debugpat [X86] Enable PAT debugging
- decnet.addr= [HW,NET]
- Format: <area>[,<node>]
- See also Documentation/networking/decnet.rst.
-
default_hugepagesz=
[HW] The size of the default HugeTLB page. This is
the size represented by the legacy /proc/ hugepages
========= =================== = ========== ==================
Directory Content Directory Content
========= =================== = ========== ==================
- core General parameter appletalk Appletalk protocol
- unix Unix domain sockets netrom NET/ROM
- 802 E802 protocol ax25 AX25
- ethernet Ethernet protocol rose X.25 PLP layer
- ipv4 IP version 4 x25 X.25 protocol
- bridge Bridging decnet DEC net
- ipv6 IP version 6 tipc TIPC
+ 802 E802 protocol mptcp Multipath TCP
+ appletalk Appletalk protocol netfilter Network Filter
+ ax25 AX25 netrom NET/ROM
+ bridge Bridging rose X.25 PLP layer
+ core General parameter tipc TIPC
+ ethernet Ethernet protocol unix Unix domain sockets
+ ipv4 IP version 4 x25 X.25 protocol
+ ipv6 IP version 6
========= =================== = ========== ==================
1. /proc/sys/net/core - Network core options
+++ /dev/null
-.. SPDX-License-Identifier: GPL-2.0
-
-=========================================
-Linux DECnet Networking Layer Information
-=========================================
-
-1. Other documentation....
-==========================
-
- - Project Home Pages
- - http://www.chygwyn.com/ - Kernel info
- - http://linux-decnet.sourceforge.net/ - Userland tools
- - http://www.sourceforge.net/projects/linux-decnet/ - Status page
-
-2. Configuring the kernel
-=========================
-
-Be sure to turn on the following options:
-
- - CONFIG_DECNET (obviously)
- - CONFIG_PROC_FS (to see what's going on)
- - CONFIG_SYSCTL (for easy configuration)
-
-if you want to try out router support (not properly debugged yet)
-you'll need the following options as well...
-
- - CONFIG_DECNET_ROUTER (to be able to add/delete routes)
- - CONFIG_NETFILTER (will be required for the DECnet routing daemon)
-
-Don't turn on SIOCGIFCONF support for DECnet unless you are really sure
-that you need it, in general you won't and it can cause ifconfig to
-malfunction.
-
-Run time configuration has changed slightly from the 2.4 system. If you
-want to configure an endnode, then the simplified procedure is as follows:
-
- - Set the MAC address on your ethernet card before starting _any_ other
- network protocols.
-
-As soon as your network card is brought into the UP state, DECnet should
-start working. If you need something more complicated or are unsure how
-to set the MAC address, see the next section. Also all configurations which
-worked with 2.4 will work under 2.5 with no change.
-
-3. Command line options
-=======================
-
-You can set a DECnet address on the kernel command line for compatibility
-with the 2.4 configuration procedure, but in general it's not needed any more.
-If you do st a DECnet address on the command line, it has only one purpose
-which is that its added to the addresses on the loopback device.
-
-With 2.4 kernels, DECnet would only recognise addresses as local if they
-were added to the loopback device. In 2.5, any local interface address
-can be used to loop back to the local machine. Of course this does not
-prevent you adding further addresses to the loopback device if you
-want to.
-
-N.B. Since the address list of an interface determines the addresses for
-which "hello" messages are sent, if you don't set an address on the loopback
-interface then you won't see any entries in /proc/net/neigh for the local
-host until such time as you start a connection. This doesn't affect the
-operation of the local communications in any other way though.
-
-The kernel command line takes options looking like the following::
-
- decnet.addr=1,2
-
-the two numbers are the node address 1,2 = 1.2 For 2.2.xx kernels
-and early 2.3.xx kernels, you must use a comma when specifying the
-DECnet address like this. For more recent 2.3.xx kernels, you may
-use almost any character except space, although a `.` would be the most
-obvious choice :-)
-
-There used to be a third number specifying the node type. This option
-has gone away in favour of a per interface node type. This is now set
-using /proc/sys/net/decnet/conf/<dev>/forwarding. This file can be
-set with a single digit, 0=EndNode, 1=L1 Router and 2=L2 Router.
-
-There are also equivalent options for modules. The node address can
-also be set through the /proc/sys/net/decnet/ files, as can other system
-parameters.
-
-Currently the only supported devices are ethernet and ip_gre. The
-ethernet address of your ethernet card has to be set according to the DECnet
-address of the node in order for it to be autoconfigured (and then appear in
-/proc/net/decnet_dev). There is a utility available at the above
-FTP sites called dn2ethaddr which can compute the correct ethernet
-address to use. The address can be set by ifconfig either before or
-at the time the device is brought up. If you are using RedHat you can
-add the line::
-
- MACADDR=AA:00:04:00:03:04
-
-or something similar, to /etc/sysconfig/network-scripts/ifcfg-eth0 or
-wherever your network card's configuration lives. Setting the MAC address
-of your ethernet card to an address starting with "hi-ord" will cause a
-DECnet address which matches to be added to the interface (which you can
-verify with iproute2).
-
-The default device for routing can be set through the /proc filesystem
-by setting /proc/sys/net/decnet/default_device to the
-device you want DECnet to route packets out of when no specific route
-is available. Usually this will be eth0, for example::
-
- echo -n "eth0" >/proc/sys/net/decnet/default_device
-
-If you don't set the default device, then it will default to the first
-ethernet card which has been autoconfigured as described above. You can
-confirm that by looking in the default_device file of course.
-
-There is a list of what the other files under /proc/sys/net/decnet/ do
-on the kernel patch web site (shown above).
-
-4. Run time kernel configuration
-================================
-
-
-This is either done through the sysctl/proc interface (see the kernel web
-pages for details on what the various options do) or through the iproute2
-package in the same way as IPv4/6 configuration is performed.
-
-Documentation for iproute2 is included with the package, although there is
-as yet no specific section on DECnet, most of the features apply to both
-IP and DECnet, albeit with DECnet addresses instead of IP addresses and
-a reduced functionality.
-
-If you want to configure a DECnet router you'll need the iproute2 package
-since its the _only_ way to add and delete routes currently. Eventually
-there will be a routing daemon to send and receive routing messages for
-each interface and update the kernel routing tables accordingly. The
-routing daemon will use netfilter to listen to routing packets, and
-rtnetlink to update the kernels routing tables.
-
-The DECnet raw socket layer has been removed since it was there purely
-for use by the routing daemon which will now use netfilter (a much cleaner
-and more generic solution) instead.
-
-5. How can I tell if its working?
-=================================
-
-Here is a quick guide of what to look for in order to know if your DECnet
-kernel subsystem is working.
-
- - Is the node address set (see /proc/sys/net/decnet/node_address)
- - Is the node of the correct type
- (see /proc/sys/net/decnet/conf/<dev>/forwarding)
- - Is the Ethernet MAC address of each Ethernet card set to match
- the DECnet address. If in doubt use the dn2ethaddr utility available
- at the ftp archive.
- - If the previous two steps are satisfied, and the Ethernet card is up,
- you should find that it is listed in /proc/net/decnet_dev and also
- that it appears as a directory in /proc/sys/net/decnet/conf/. The
- loopback device (lo) should also appear and is required to communicate
- within a node.
- - If you have any DECnet routers on your network, they should appear
- in /proc/net/decnet_neigh, otherwise this file will only contain the
- entry for the node itself (if it doesn't check to see if lo is up).
- - If you want to send to any node which is not listed in the
- /proc/net/decnet_neigh file, you'll need to set the default device
- to point to an Ethernet card with connection to a router. This is
- again done with the /proc/sys/net/decnet/default_device file.
- - Try starting a simple server and client, like the dnping/dnmirror
- over the loopback interface. With luck they should communicate.
- For this step and those after, you'll need the DECnet library
- which can be obtained from the above ftp sites as well as the
- actual utilities themselves.
- - If this seems to work, then try talking to a node on your local
- network, and see if you can obtain the same results.
- - At this point you are on your own... :-)
-
-6. How to send a bug report
-===========================
-
-If you've found a bug and want to report it, then there are several things
-you can do to help me work out exactly what it is that is wrong. Useful
-information (_most_ of which _is_ _essential_) includes:
-
- - What kernel version are you running ?
- - What version of the patch are you running ?
- - How far though the above set of tests can you get ?
- - What is in the /proc/decnet* files and /proc/sys/net/decnet/* files ?
- - Which services are you running ?
- - Which client caused the problem ?
- - How much data was being transferred ?
- - Was the network congested ?
- - How can the problem be reproduced ?
- - Can you use tcpdump to get a trace ? (N.B. Most (all?) versions of
- tcpdump don't understand how to dump DECnet properly, so including
- the hex listing of the packet contents is _essential_, usually the -x flag.
- You may also need to increase the length grabbed with the -s flag. The
- -e flag also provides very useful information (ethernet MAC addresses))
-
-7. MAC FAQ
-==========
-
-A quick FAQ on ethernet MAC addresses to explain how Linux and DECnet
-interact and how to get the best performance from your hardware.
-
-Ethernet cards are designed to normally only pass received network frames
-to a host computer when they are addressed to it, or to the broadcast address.
-
-Linux has an interface which allows the setting of extra addresses for
-an ethernet card to listen to. If the ethernet card supports it, the
-filtering operation will be done in hardware, if not the extra unwanted packets
-received will be discarded by the host computer. In the latter case,
-significant processor time and bus bandwidth can be used up on a busy
-network (see the NAPI documentation for a longer explanation of these
-effects).
-
-DECnet makes use of this interface to allow running DECnet on an ethernet
-card which has already been configured using TCP/IP (presumably using the
-built in MAC address of the card, as usual) and/or to allow multiple DECnet
-addresses on each physical interface. If you do this, be aware that if your
-ethernet card doesn't support perfect hashing in its MAC address filter
-then your computer will be doing more work than required. Some cards
-will simply set themselves into promiscuous mode in order to receive
-packets from the DECnet specified addresses. So if you have one of these
-cards its better to set the MAC address of the card as described above
-to gain the best efficiency. Better still is to use a card which supports
-NAPI as well.
-
-
-8. Mailing list
-===============
-
-If you are keen to get involved in development, or want to ask questions
-about configuration, or even just report bugs, then there is a mailing
-list that you can join, details are at:
-
-http://sourceforge.net/mail/?group_id=4993
-
-9. Legal Info
-=============
-
-The Linux DECnet project team have placed their code under the GPL. The
-software is provided "as is" and without warranty express or implied.
-DECnet is a trademark of Compaq. This software is not a product of
-Compaq. We acknowledge the help of people at Compaq in providing extra
-documentation above and beyond what was previously publicly available.
-
-Steve Whitehouse <SteveW@ACM.org>
-
cdc_mbim
dccp
dctcp
- decnet
dns_resolver
driver
eql
0x89 00-06 arch/x86/include/asm/sockios.h
0x89 0B-DF linux/sockios.h
0x89 E0-EF linux/sockios.h SIOCPROTOPRIVATE range
-0x89 E0-EF linux/dn.h PROTOPRIVATE range
0x89 F0-FF linux/sockios.h SIOCDEVPRIVATE range
0x8B all linux/wireless.h
0x8C 00-3F WiNRADiO driver
F: include/uapi/linux/dccp.h
F: net/dccp/
-DECnet NETWORK LAYER
-L: linux-decnet-user@lists.sourceforge.net
-S: Orphan
-W: http://linux-decnet.sourceforge.net
-F: Documentation/networking/decnet.rst
-F: net/decnet/
-
DECSTATION PLATFORM SUPPORT
M: "Maciej W. Rozycki" <macro@orcam.me.uk>
L: linux-mips@vger.kernel.org
CONFIG_NETWORK_SECMARK=y
CONFIG_IP_SCTP=m
CONFIG_VLAN_8021Q=m
-CONFIG_DECNET=m
-CONFIG_DECNET_ROUTER=y
# CONFIG_WIRELESS is not set
# CONFIG_UEVENT_HELPER is not set
# CONFIG_FW_LOADER is not set
CONFIG_NETWORK_SECMARK=y
CONFIG_IP_SCTP=m
CONFIG_VLAN_8021Q=m
-CONFIG_DECNET=m
-CONFIG_DECNET_ROUTER=y
# CONFIG_WIRELESS is not set
# CONFIG_UEVENT_HELPER is not set
# CONFIG_FW_LOADER is not set
CONFIG_NETWORK_SECMARK=y
CONFIG_IP_SCTP=m
CONFIG_VLAN_8021Q=m
-CONFIG_DECNET=m
-CONFIG_DECNET_ROUTER=y
# CONFIG_WIRELESS is not set
# CONFIG_UEVENT_HELPER is not set
# CONFIG_FW_LOADER is not set
CONFIG_IP_NF_ARPTABLES=m
CONFIG_IP_NF_ARPFILTER=m
CONFIG_IP_NF_ARP_MANGLE=m
-CONFIG_DECNET_NF_GRABULATOR=m
CONFIG_BRIDGE_NF_EBTABLES=m
CONFIG_BRIDGE_EBT_BROUTE=m
CONFIG_BRIDGE_EBT_T_FILTER=m
CONFIG_ATM_BR2684=m
CONFIG_BRIDGE=m
CONFIG_VLAN_8021Q=m
-CONFIG_DECNET=m
CONFIG_LLC2=m
CONFIG_ATALK=m
CONFIG_DEV_APPLETALK=m
CONFIG_IP6_NF_TARGET_REJECT=m
CONFIG_IP6_NF_MANGLE=m
CONFIG_IP6_NF_RAW=m
-CONFIG_DECNET_NF_GRABULATOR=m
CONFIG_BRIDGE_NF_EBTABLES=m
CONFIG_BRIDGE_EBT_BROUTE=m
CONFIG_BRIDGE_EBT_T_FILTER=m
CONFIG_ATM_BR2684=m
CONFIG_BRIDGE=m
CONFIG_VLAN_8021Q=m
-CONFIG_DECNET=m
CONFIG_LLC2=m
CONFIG_ATALK=m
CONFIG_DEV_APPLETALK=m
CONFIG_IP6_NF_TARGET_REJECT=m
CONFIG_IP6_NF_MANGLE=m
CONFIG_IP6_NF_RAW=m
-CONFIG_DECNET_NF_GRABULATOR=m
CONFIG_BRIDGE_NF_EBTABLES=m
CONFIG_BRIDGE_EBT_BROUTE=m
CONFIG_BRIDGE_EBT_T_FILTER=m
CONFIG_BRIDGE_EBT_SNAT=m
CONFIG_BRIDGE_EBT_LOG=m
CONFIG_BRIDGE=m
-CONFIG_DECNET=m
CONFIG_NET_SCHED=y
CONFIG_NET_SCH_CBQ=m
CONFIG_NET_SCH_HTB=m
CONFIG_ATM_BR2684=m
CONFIG_BRIDGE=m
CONFIG_VLAN_8021Q=m
-CONFIG_DECNET=m
-CONFIG_DECNET_ROUTER=y
CONFIG_ATALK=m
CONFIG_DEV_APPLETALK=m
CONFIG_IPDDP=m
* @tipc_ptr: TIPC specific data
* @atalk_ptr: AppleTalk link
* @ip_ptr: IPv4 specific data
- * @dn_ptr: DECnet specific data
* @ip6_ptr: IPv6 specific data
* @ax25_ptr: AX.25 specific data
* @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
#if IS_ENABLED(CONFIG_ATALK)
void *atalk_ptr;
#endif
-#if IS_ENABLED(CONFIG_DECNET)
- struct dn_dev __rcu *dn_ptr;
-#endif
#if IS_ENABLED(CONFIG_AX25)
void *ax25_ptr;
#endif
hook_head = rcu_dereference(net->nf.hooks_bridge[hook]);
#endif
break;
-#if IS_ENABLED(CONFIG_DECNET)
- case NFPROTO_DECNET:
- hook_head = rcu_dereference(net->nf.hooks_decnet[hook]);
- break;
-#endif
default:
WARN_ON_ONCE(1);
break;
/* in/out/forward only */
#define NF_ARP_NUMHOOKS 3
-/* max hook is NF_DN_ROUTE (6), also see uapi/linux/netfilter_decnet.h */
-#define NF_DN_NUMHOOKS 7
-
-#if IS_ENABLED(CONFIG_DECNET)
-/* Largest hook number + 1, see uapi/linux/netfilter_decnet.h */
-#define NF_MAX_HOOKS NF_DN_NUMHOOKS
-#else
#define NF_MAX_HOOKS NF_INET_NUMHOOKS
-#endif
#endif
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _NET_DN_H
-#define _NET_DN_H
-
-#include <linux/dn.h>
-#include <net/sock.h>
-#include <net/flow.h>
-#include <asm/byteorder.h>
-#include <asm/unaligned.h>
-
-struct dn_scp /* Session Control Port */
-{
- unsigned char state;
-#define DN_O 1 /* Open */
-#define DN_CR 2 /* Connect Receive */
-#define DN_DR 3 /* Disconnect Reject */
-#define DN_DRC 4 /* Discon. Rej. Complete*/
-#define DN_CC 5 /* Connect Confirm */
-#define DN_CI 6 /* Connect Initiate */
-#define DN_NR 7 /* No resources */
-#define DN_NC 8 /* No communication */
-#define DN_CD 9 /* Connect Delivery */
-#define DN_RJ 10 /* Rejected */
-#define DN_RUN 11 /* Running */
-#define DN_DI 12 /* Disconnect Initiate */
-#define DN_DIC 13 /* Disconnect Complete */
-#define DN_DN 14 /* Disconnect Notificat */
-#define DN_CL 15 /* Closed */
-#define DN_CN 16 /* Closed Notification */
-
- __le16 addrloc;
- __le16 addrrem;
- __u16 numdat;
- __u16 numoth;
- __u16 numoth_rcv;
- __u16 numdat_rcv;
- __u16 ackxmt_dat;
- __u16 ackxmt_oth;
- __u16 ackrcv_dat;
- __u16 ackrcv_oth;
- __u8 flowrem_sw;
- __u8 flowloc_sw;
-#define DN_SEND 2
-#define DN_DONTSEND 1
-#define DN_NOCHANGE 0
- __u16 flowrem_dat;
- __u16 flowrem_oth;
- __u16 flowloc_dat;
- __u16 flowloc_oth;
- __u8 services_rem;
- __u8 services_loc;
- __u8 info_rem;
- __u8 info_loc;
-
- __u16 segsize_rem;
- __u16 segsize_loc;
-
- __u8 nonagle;
- __u8 multi_ireq;
- __u8 accept_mode;
- unsigned long seg_total; /* Running total of current segment */
-
- struct optdata_dn conndata_in;
- struct optdata_dn conndata_out;
- struct optdata_dn discdata_in;
- struct optdata_dn discdata_out;
- struct accessdata_dn accessdata;
-
- struct sockaddr_dn addr; /* Local address */
- struct sockaddr_dn peer; /* Remote address */
-
- /*
- * In this case the RTT estimation is not specified in the
- * docs, nor is any back off algorithm. Here we follow well
- * known tcp algorithms with a few small variations.
- *
- * snd_window: Max number of packets we send before we wait for
- * an ack to come back. This will become part of a
- * more complicated scheme when we support flow
- * control.
- *
- * nsp_srtt: Round-Trip-Time (x8) in jiffies. This is a rolling
- * average.
- * nsp_rttvar: Round-Trip-Time-Varience (x4) in jiffies. This is the
- * varience of the smoothed average (but calculated in
- * a simpler way than for normal statistical varience
- * calculations).
- *
- * nsp_rxtshift: Backoff counter. Value is zero normally, each time
- * a packet is lost is increases by one until an ack
- * is received. Its used to index an array of backoff
- * multipliers.
- */
-#define NSP_MIN_WINDOW 1
-#define NSP_MAX_WINDOW (0x07fe)
- unsigned long max_window;
- unsigned long snd_window;
-#define NSP_INITIAL_SRTT (HZ)
- unsigned long nsp_srtt;
-#define NSP_INITIAL_RTTVAR (HZ*3)
- unsigned long nsp_rttvar;
-#define NSP_MAXRXTSHIFT 12
- unsigned long nsp_rxtshift;
-
- /*
- * Output queues, one for data, one for otherdata/linkservice
- */
- struct sk_buff_head data_xmit_queue;
- struct sk_buff_head other_xmit_queue;
-
- /*
- * Input queue for other data
- */
- struct sk_buff_head other_receive_queue;
- int other_report;
-
- /*
- * Stuff to do with the slow timer
- */
- unsigned long stamp; /* time of last transmit */
- unsigned long persist;
- int (*persist_fxn)(struct sock *sk);
- unsigned long keepalive;
- void (*keepalive_fxn)(struct sock *sk);
-
-};
-
-static inline struct dn_scp *DN_SK(struct sock *sk)
-{
- return (struct dn_scp *)(sk + 1);
-}
-
-/*
- * src,dst : Source and Destination DECnet addresses
- * hops : Number of hops through the network
- * dst_port, src_port : NSP port numbers
- * services, info : Useful data extracted from conninit messages
- * rt_flags : Routing flags byte
- * nsp_flags : NSP layer flags byte
- * segsize : Size of segment
- * segnum : Number, for data, otherdata and linkservice
- * xmit_count : Number of times we've transmitted this skb
- * stamp : Time stamp of most recent transmission, used in RTT calculations
- * iif: Input interface number
- *
- * As a general policy, this structure keeps all addresses in network
- * byte order, and all else in host byte order. Thus dst, src, dst_port
- * and src_port are in network order. All else is in host order.
- *
- */
-#define DN_SKB_CB(skb) ((struct dn_skb_cb *)(skb)->cb)
-struct dn_skb_cb {
- __le16 dst;
- __le16 src;
- __u16 hops;
- __le16 dst_port;
- __le16 src_port;
- __u8 services;
- __u8 info;
- __u8 rt_flags;
- __u8 nsp_flags;
- __u16 segsize;
- __u16 segnum;
- __u16 xmit_count;
- unsigned long stamp;
- int iif;
-};
-
-static inline __le16 dn_eth2dn(const unsigned char *ethaddr)
-{
- return get_unaligned((__le16 *)(ethaddr + 4));
-}
-
-static inline __le16 dn_saddr2dn(struct sockaddr_dn *saddr)
-{
- return *(__le16 *)saddr->sdn_nodeaddr;
-}
-
-static inline void dn_dn2eth(unsigned char *ethaddr, __le16 addr)
-{
- __u16 a = le16_to_cpu(addr);
- ethaddr[0] = 0xAA;
- ethaddr[1] = 0x00;
- ethaddr[2] = 0x04;
- ethaddr[3] = 0x00;
- ethaddr[4] = (__u8)(a & 0xff);
- ethaddr[5] = (__u8)(a >> 8);
-}
-
-static inline void dn_sk_ports_copy(struct flowidn *fld, struct dn_scp *scp)
-{
- fld->fld_sport = scp->addrloc;
- fld->fld_dport = scp->addrrem;
-}
-
-unsigned int dn_mss_from_pmtu(struct net_device *dev, int mtu);
-void dn_register_sysctl(void);
-void dn_unregister_sysctl(void);
-
-#define DN_MENUVER_ACC 0x01
-#define DN_MENUVER_USR 0x02
-#define DN_MENUVER_PRX 0x04
-#define DN_MENUVER_UIC 0x08
-
-struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr);
-struct sock *dn_find_by_skb(struct sk_buff *skb);
-#define DN_ASCBUF_LEN 9
-char *dn_addr2asc(__u16, char *);
-int dn_destroy_timer(struct sock *sk);
-
-int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf,
- unsigned char type);
-int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr,
- unsigned char *type);
-
-void dn_start_slow_timer(struct sock *sk);
-void dn_stop_slow_timer(struct sock *sk);
-
-extern __le16 decnet_address;
-extern int decnet_debug_level;
-extern int decnet_time_wait;
-extern int decnet_dn_count;
-extern int decnet_di_count;
-extern int decnet_dr_count;
-extern int decnet_no_fc_max_cwnd;
-
-extern long sysctl_decnet_mem[3];
-extern int sysctl_decnet_wmem[3];
-extern int sysctl_decnet_rmem[3];
-
-#endif /* _NET_DN_H */
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _NET_DN_DEV_H
-#define _NET_DN_DEV_H
-
-#include <linux/netdevice.h>
-
-struct dn_dev;
-
-struct dn_ifaddr {
- struct dn_ifaddr __rcu *ifa_next;
- struct dn_dev *ifa_dev;
- __le16 ifa_local;
- __le16 ifa_address;
- __u32 ifa_flags;
- __u8 ifa_scope;
- char ifa_label[IFNAMSIZ];
- struct rcu_head rcu;
-};
-
-#define DN_DEV_S_RU 0 /* Run - working normally */
-#define DN_DEV_S_CR 1 /* Circuit Rejected */
-#define DN_DEV_S_DS 2 /* Data Link Start */
-#define DN_DEV_S_RI 3 /* Routing Layer Initialize */
-#define DN_DEV_S_RV 4 /* Routing Layer Verify */
-#define DN_DEV_S_RC 5 /* Routing Layer Complete */
-#define DN_DEV_S_OF 6 /* Off */
-#define DN_DEV_S_HA 7 /* Halt */
-
-
-/*
- * The dn_dev_parms structure contains the set of parameters
- * for each device (hence inclusion in the dn_dev structure)
- * and an array is used to store the default types of supported
- * device (in dn_dev.c).
- *
- * The type field matches the ARPHRD_ constants and is used in
- * searching the list for supported devices when new devices
- * come up.
- *
- * The mode field is used to find out if a device is broadcast,
- * multipoint, or pointopoint. Please note that DECnet thinks
- * different ways about devices to the rest of the kernel
- * so the normal IFF_xxx flags are invalid here. For devices
- * which can be any combination of the previously mentioned
- * attributes, you can set this on a per device basis by
- * installing an up() routine.
- *
- * The device state field, defines the initial state in which the
- * device will come up. In the dn_dev structure, it is the actual
- * state.
- *
- * Things have changed here. I've killed timer1 since it's a user space
- * issue for a user space routing deamon to sort out. The kernel does
- * not need to be bothered with it.
- *
- * Timers:
- * t2 - Rate limit timer, min time between routing and hello messages
- * t3 - Hello timer, send hello messages when it expires
- *
- * Callbacks:
- * up() - Called to initialize device, return value can veto use of
- * device with DECnet.
- * down() - Called to turn device off when it goes down
- * timer3() - Called once for each ifaddr when timer 3 goes off
- *
- * sysctl - Hook for sysctl things
- *
- */
-struct dn_dev_parms {
- int type; /* ARPHRD_xxx */
- int mode; /* Broadcast, Unicast, Mulitpoint */
-#define DN_DEV_BCAST 1
-#define DN_DEV_UCAST 2
-#define DN_DEV_MPOINT 4
- int state; /* Initial state */
- int forwarding; /* 0=EndNode, 1=L1Router, 2=L2Router */
- unsigned long t2; /* Default value of t2 */
- unsigned long t3; /* Default value of t3 */
- int priority; /* Priority to be a router */
- char *name; /* Name for sysctl */
- int (*up)(struct net_device *);
- void (*down)(struct net_device *);
- void (*timer3)(struct net_device *, struct dn_ifaddr *ifa);
- void *sysctl;
-};
-
-
-struct dn_dev {
- struct dn_ifaddr __rcu *ifa_list;
- struct net_device *dev;
- struct dn_dev_parms parms;
- char use_long;
- struct timer_list timer;
- unsigned long t3;
- struct neigh_parms *neigh_parms;
- __u8 addr[ETH_ALEN];
- struct neighbour *router; /* Default router on circuit */
- struct neighbour *peer; /* Peer on pointopoint links */
- unsigned long uptime; /* Time device went up in jiffies */
-};
-
-struct dn_short_packet {
- __u8 msgflg;
- __le16 dstnode;
- __le16 srcnode;
- __u8 forward;
-} __packed;
-
-struct dn_long_packet {
- __u8 msgflg;
- __u8 d_area;
- __u8 d_subarea;
- __u8 d_id[6];
- __u8 s_area;
- __u8 s_subarea;
- __u8 s_id[6];
- __u8 nl2;
- __u8 visit_ct;
- __u8 s_class;
- __u8 pt;
-} __packed;
-
-/*------------------------- DRP - Routing messages ---------------------*/
-
-struct endnode_hello_message {
- __u8 msgflg;
- __u8 tiver[3];
- __u8 id[6];
- __u8 iinfo;
- __le16 blksize;
- __u8 area;
- __u8 seed[8];
- __u8 neighbor[6];
- __le16 timer;
- __u8 mpd;
- __u8 datalen;
- __u8 data[2];
-} __packed;
-
-struct rtnode_hello_message {
- __u8 msgflg;
- __u8 tiver[3];
- __u8 id[6];
- __u8 iinfo;
- __le16 blksize;
- __u8 priority;
- __u8 area;
- __le16 timer;
- __u8 mpd;
-} __packed;
-
-
-void dn_dev_init(void);
-void dn_dev_cleanup(void);
-
-int dn_dev_ioctl(unsigned int cmd, void __user *arg);
-
-void dn_dev_devices_off(void);
-void dn_dev_devices_on(void);
-
-void dn_dev_init_pkt(struct sk_buff *skb);
-void dn_dev_veri_pkt(struct sk_buff *skb);
-void dn_dev_hello(struct sk_buff *skb);
-
-void dn_dev_up(struct net_device *);
-void dn_dev_down(struct net_device *);
-
-int dn_dev_set_default(struct net_device *dev, int force);
-struct net_device *dn_dev_get_default(void);
-int dn_dev_bind_default(__le16 *addr);
-
-int register_dnaddr_notifier(struct notifier_block *nb);
-int unregister_dnaddr_notifier(struct notifier_block *nb);
-
-static inline int dn_dev_islocal(struct net_device *dev, __le16 addr)
-{
- struct dn_dev *dn_db;
- struct dn_ifaddr *ifa;
- int res = 0;
-
- rcu_read_lock();
- dn_db = rcu_dereference(dev->dn_ptr);
- if (dn_db == NULL) {
- printk(KERN_DEBUG "dn_dev_islocal: Called for non DECnet device\n");
- goto out;
- }
-
- for (ifa = rcu_dereference(dn_db->ifa_list);
- ifa != NULL;
- ifa = rcu_dereference(ifa->ifa_next))
- if ((addr ^ ifa->ifa_local) == 0) {
- res = 1;
- break;
- }
-out:
- rcu_read_unlock();
- return res;
-}
-
-#endif /* _NET_DN_DEV_H */
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _NET_DN_FIB_H
-#define _NET_DN_FIB_H
-
-#include <linux/netlink.h>
-#include <linux/refcount.h>
-#include <linux/rtnetlink.h>
-#include <net/fib_rules.h>
-
-extern const struct nla_policy rtm_dn_policy[];
-
-struct dn_fib_res {
- struct fib_rule *r;
- struct dn_fib_info *fi;
- unsigned char prefixlen;
- unsigned char nh_sel;
- unsigned char type;
- unsigned char scope;
-};
-
-struct dn_fib_nh {
- struct net_device *nh_dev;
- unsigned int nh_flags;
- unsigned char nh_scope;
- int nh_weight;
- int nh_power;
- int nh_oif;
- __le16 nh_gw;
-};
-
-struct dn_fib_info {
- struct dn_fib_info *fib_next;
- struct dn_fib_info *fib_prev;
- refcount_t fib_treeref;
- refcount_t fib_clntref;
- int fib_dead;
- unsigned int fib_flags;
- int fib_protocol;
- __le16 fib_prefsrc;
- __u32 fib_priority;
- __u32 fib_metrics[RTAX_MAX];
- int fib_nhs;
- int fib_power;
- struct dn_fib_nh fib_nh[0];
-#define dn_fib_dev fib_nh[0].nh_dev
-};
-
-
-#define DN_FIB_RES_RESET(res) ((res).nh_sel = 0)
-#define DN_FIB_RES_NH(res) ((res).fi->fib_nh[(res).nh_sel])
-
-#define DN_FIB_RES_PREFSRC(res) ((res).fi->fib_prefsrc ? : __dn_fib_res_prefsrc(&res))
-#define DN_FIB_RES_GW(res) (DN_FIB_RES_NH(res).nh_gw)
-#define DN_FIB_RES_DEV(res) (DN_FIB_RES_NH(res).nh_dev)
-#define DN_FIB_RES_OIF(res) (DN_FIB_RES_NH(res).nh_oif)
-
-typedef struct {
- __le16 datum;
-} dn_fib_key_t;
-
-typedef struct {
- __le16 datum;
-} dn_fib_hash_t;
-
-typedef struct {
- __u16 datum;
-} dn_fib_idx_t;
-
-struct dn_fib_node {
- struct dn_fib_node *fn_next;
- struct dn_fib_info *fn_info;
-#define DN_FIB_INFO(f) ((f)->fn_info)
- dn_fib_key_t fn_key;
- u8 fn_type;
- u8 fn_scope;
- u8 fn_state;
-};
-
-
-struct dn_fib_table {
- struct hlist_node hlist;
- u32 n;
-
- int (*insert)(struct dn_fib_table *t, struct rtmsg *r,
- struct nlattr *attrs[], struct nlmsghdr *n,
- struct netlink_skb_parms *req);
- int (*delete)(struct dn_fib_table *t, struct rtmsg *r,
- struct nlattr *attrs[], struct nlmsghdr *n,
- struct netlink_skb_parms *req);
- int (*lookup)(struct dn_fib_table *t, const struct flowidn *fld,
- struct dn_fib_res *res);
- int (*flush)(struct dn_fib_table *t);
- int (*dump)(struct dn_fib_table *t, struct sk_buff *skb, struct netlink_callback *cb);
-
- unsigned char data[];
-};
-
-#ifdef CONFIG_DECNET_ROUTER
-/*
- * dn_fib.c
- */
-void dn_fib_init(void);
-void dn_fib_cleanup(void);
-
-int dn_fib_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
-struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r,
- struct nlattr *attrs[],
- const struct nlmsghdr *nlh, int *errp);
-int dn_fib_semantic_match(int type, struct dn_fib_info *fi,
- const struct flowidn *fld, struct dn_fib_res *res);
-void dn_fib_release_info(struct dn_fib_info *fi);
-void dn_fib_flush(void);
-void dn_fib_select_multipath(const struct flowidn *fld, struct dn_fib_res *res);
-
-/*
- * dn_tables.c
- */
-struct dn_fib_table *dn_fib_get_table(u32 n, int creat);
-struct dn_fib_table *dn_fib_empty_table(void);
-void dn_fib_table_init(void);
-void dn_fib_table_cleanup(void);
-
-/*
- * dn_rules.c
- */
-void dn_fib_rules_init(void);
-void dn_fib_rules_cleanup(void);
-unsigned int dnet_addr_type(__le16 addr);
-int dn_fib_lookup(struct flowidn *fld, struct dn_fib_res *res);
-
-int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb);
-
-void dn_fib_free_info(struct dn_fib_info *fi);
-
-static inline void dn_fib_info_put(struct dn_fib_info *fi)
-{
- if (refcount_dec_and_test(&fi->fib_clntref))
- dn_fib_free_info(fi);
-}
-
-static inline void dn_fib_res_put(struct dn_fib_res *res)
-{
- if (res->fi)
- dn_fib_info_put(res->fi);
- if (res->r)
- fib_rule_put(res->r);
-}
-
-#else /* Endnode */
-
-#define dn_fib_init() do { } while(0)
-#define dn_fib_cleanup() do { } while(0)
-
-#define dn_fib_lookup(fl, res) (-ESRCH)
-#define dn_fib_info_put(fi) do { } while(0)
-#define dn_fib_select_multipath(fl, res) do { } while(0)
-#define dn_fib_rules_policy(saddr,res,flags) (0)
-#define dn_fib_res_put(res) do { } while(0)
-
-#endif /* CONFIG_DECNET_ROUTER */
-
-static inline __le16 dnet_make_mask(int n)
-{
- if (n)
- return cpu_to_le16(~((1 << (16 - n)) - 1));
- return cpu_to_le16(0);
-}
-
-#endif /* _NET_DN_FIB_H */
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _NET_DN_NEIGH_H
-#define _NET_DN_NEIGH_H
-
-#include <net/neighbour.h>
-
-/*
- * The position of the first two fields of
- * this structure are critical - SJW
- */
-struct dn_neigh {
- struct neighbour n;
- __le16 addr;
- unsigned long flags;
-#define DN_NDFLAG_R1 0x0001 /* Router L1 */
-#define DN_NDFLAG_R2 0x0002 /* Router L2 */
-#define DN_NDFLAG_P3 0x0004 /* Phase III Node */
- unsigned long blksize;
- __u8 priority;
-};
-
-void dn_neigh_init(void);
-void dn_neigh_cleanup(void);
-int dn_neigh_router_hello(struct net *net, struct sock *sk, struct sk_buff *skb);
-int dn_neigh_endnode_hello(struct net *net, struct sock *sk, struct sk_buff *skb);
-void dn_neigh_pointopoint_hello(struct sk_buff *skb);
-int dn_neigh_elist(struct net_device *dev, unsigned char *ptr, int n);
-int dn_to_neigh_output(struct net *net, struct sock *sk, struct sk_buff *skb);
-
-extern struct neigh_table dn_neigh_table;
-
-#endif /* _NET_DN_NEIGH_H */
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-#ifndef _NET_DN_NSP_H
-#define _NET_DN_NSP_H
-/******************************************************************************
- (c) 1995-1998 E.M. Serrat emserrat@geocities.com
-
-*******************************************************************************/
-/* dn_nsp.c functions prototyping */
-#include <linux/atomic.h>
-#include <linux/types.h>
-#include <net/sock.h>
-
-struct sk_buff;
-struct sk_buff_head;
-
-void dn_nsp_send_data_ack(struct sock *sk);
-void dn_nsp_send_oth_ack(struct sock *sk);
-void dn_send_conn_ack(struct sock *sk);
-void dn_send_conn_conf(struct sock *sk, gfp_t gfp);
-void dn_nsp_send_disc(struct sock *sk, unsigned char type,
- unsigned short reason, gfp_t gfp);
-void dn_nsp_return_disc(struct sk_buff *skb, unsigned char type,
- unsigned short reason);
-void dn_nsp_send_link(struct sock *sk, unsigned char lsflags, char fcval);
-void dn_nsp_send_conninit(struct sock *sk, unsigned char flags);
-
-void dn_nsp_output(struct sock *sk);
-int dn_nsp_check_xmit_queue(struct sock *sk, struct sk_buff *skb,
- struct sk_buff_head *q, unsigned short acknum);
-void dn_nsp_queue_xmit(struct sock *sk, struct sk_buff *skb, gfp_t gfp,
- int oob);
-unsigned long dn_nsp_persist(struct sock *sk);
-int dn_nsp_xmit_timeout(struct sock *sk);
-
-int dn_nsp_rx(struct sk_buff *);
-int dn_nsp_backlog_rcv(struct sock *sk, struct sk_buff *skb);
-
-struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri);
-struct sk_buff *dn_alloc_send_skb(struct sock *sk, size_t *size, int noblock,
- long timeo, int *err);
-
-#define NSP_REASON_OK 0 /* No error */
-#define NSP_REASON_NR 1 /* No resources */
-#define NSP_REASON_UN 2 /* Unrecognised node name */
-#define NSP_REASON_SD 3 /* Node shutting down */
-#define NSP_REASON_ID 4 /* Invalid destination end user */
-#define NSP_REASON_ER 5 /* End user lacks resources */
-#define NSP_REASON_OB 6 /* Object too busy */
-#define NSP_REASON_US 7 /* Unspecified error */
-#define NSP_REASON_TP 8 /* Third-Party abort */
-#define NSP_REASON_EA 9 /* End user has aborted the link */
-#define NSP_REASON_IF 10 /* Invalid node name format */
-#define NSP_REASON_LS 11 /* Local node shutdown */
-#define NSP_REASON_LL 32 /* Node lacks logical-link resources */
-#define NSP_REASON_LE 33 /* End user lacks logical-link resources */
-#define NSP_REASON_UR 34 /* Unacceptable RQSTRID or PASSWORD field */
-#define NSP_REASON_UA 36 /* Unacceptable ACCOUNT field */
-#define NSP_REASON_TM 38 /* End user timed out logical link */
-#define NSP_REASON_NU 39 /* Node unreachable */
-#define NSP_REASON_NL 41 /* No-link message */
-#define NSP_REASON_DC 42 /* Disconnect confirm */
-#define NSP_REASON_IO 43 /* Image data field overflow */
-
-#define NSP_DISCINIT 0x38
-#define NSP_DISCCONF 0x48
-
-/*------------------------- NSP - messages ------------------------------*/
-/* Data Messages */
-/*---------------*/
-
-/* Data Messages (data segment/interrupt/link service) */
-
-struct nsp_data_seg_msg {
- __u8 msgflg;
- __le16 dstaddr;
- __le16 srcaddr;
-} __packed;
-
-struct nsp_data_opt_msg {
- __le16 acknum;
- __le16 segnum;
- __le16 lsflgs;
-} __packed;
-
-struct nsp_data_opt_msg1 {
- __le16 acknum;
- __le16 segnum;
-} __packed;
-
-
-/* Acknowledgment Message (data/other data) */
-struct nsp_data_ack_msg {
- __u8 msgflg;
- __le16 dstaddr;
- __le16 srcaddr;
- __le16 acknum;
-} __packed;
-
-/* Connect Acknowledgment Message */
-struct nsp_conn_ack_msg {
- __u8 msgflg;
- __le16 dstaddr;
-} __packed;
-
-
-/* Connect Initiate/Retransmit Initiate/Connect Confirm */
-struct nsp_conn_init_msg {
- __u8 msgflg;
-#define NSP_CI 0x18 /* Connect Initiate */
-#define NSP_RCI 0x68 /* Retrans. Conn Init */
- __le16 dstaddr;
- __le16 srcaddr;
- __u8 services;
-#define NSP_FC_NONE 0x00 /* Flow Control None */
-#define NSP_FC_SRC 0x04 /* Seg Req. Count */
-#define NSP_FC_SCMC 0x08 /* Sess. Control Mess */
-#define NSP_FC_MASK 0x0c /* FC type mask */
- __u8 info;
- __le16 segsize;
-} __packed;
-
-/* Disconnect Initiate/Disconnect Confirm */
-struct nsp_disconn_init_msg {
- __u8 msgflg;
- __le16 dstaddr;
- __le16 srcaddr;
- __le16 reason;
-} __packed;
-
-
-
-struct srcobj_fmt {
- __u8 format;
- __u8 task;
- __le16 grpcode;
- __le16 usrcode;
- __u8 dlen;
-} __packed;
-
-/*
- * A collection of functions for manipulating the sequence
- * numbers used in NSP. Similar in operation to the functions
- * of the same name in TCP.
- */
-static __inline__ int dn_before(__u16 seq1, __u16 seq2)
-{
- seq1 &= 0x0fff;
- seq2 &= 0x0fff;
-
- return (int)((seq1 - seq2) & 0x0fff) > 2048;
-}
-
-
-static __inline__ int dn_after(__u16 seq1, __u16 seq2)
-{
- seq1 &= 0x0fff;
- seq2 &= 0x0fff;
-
- return (int)((seq2 - seq1) & 0x0fff) > 2048;
-}
-
-static __inline__ int dn_equal(__u16 seq1, __u16 seq2)
-{
- return ((seq1 ^ seq2) & 0x0fff) == 0;
-}
-
-static __inline__ int dn_before_or_equal(__u16 seq1, __u16 seq2)
-{
- return (dn_before(seq1, seq2) || dn_equal(seq1, seq2));
-}
-
-static __inline__ void seq_add(__u16 *seq, __u16 off)
-{
- (*seq) += off;
- (*seq) &= 0x0fff;
-}
-
-static __inline__ int seq_next(__u16 seq1, __u16 seq2)
-{
- return dn_equal(seq1 + 1, seq2);
-}
-
-/*
- * Can we delay the ack ?
- */
-static __inline__ int sendack(__u16 seq)
-{
- return (int)((seq & 0x1000) ? 0 : 1);
-}
-
-/*
- * Is socket congested ?
- */
-static __inline__ int dn_congested(struct sock *sk)
-{
- return atomic_read(&sk->sk_rmem_alloc) > (sk->sk_rcvbuf >> 1);
-}
-
-#define DN_MAX_NSP_DATA_HEADER (11)
-
-#endif /* _NET_DN_NSP_H */
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-#ifndef _NET_DN_ROUTE_H
-#define _NET_DN_ROUTE_H
-
-/******************************************************************************
- (c) 1995-1998 E.M. Serrat emserrat@geocities.com
-
-*******************************************************************************/
-
-#include <linux/types.h>
-#include <net/dst.h>
-
-struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri);
-int dn_route_output_sock(struct dst_entry __rcu **pprt, struct flowidn *,
- struct sock *sk, int flags);
-int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb);
-void dn_rt_cache_flush(int delay);
-int dn_route_rcv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type *pt, struct net_device *orig_dev);
-
-/* Masks for flags field */
-#define DN_RT_F_PID 0x07 /* Mask for packet type */
-#define DN_RT_F_PF 0x80 /* Padding Follows */
-#define DN_RT_F_VER 0x40 /* Version =0 discard packet if ==1 */
-#define DN_RT_F_IE 0x20 /* Intra Ethernet, Reserved in short pkt */
-#define DN_RT_F_RTS 0x10 /* Packet is being returned to sender */
-#define DN_RT_F_RQR 0x08 /* Return packet to sender upon non-delivery */
-
-/* Mask for types of routing packets */
-#define DN_RT_PKT_MSK 0x06
-/* Types of routing packets */
-#define DN_RT_PKT_SHORT 0x02 /* Short routing packet */
-#define DN_RT_PKT_LONG 0x06 /* Long routing packet */
-
-/* Mask for control/routing selection */
-#define DN_RT_PKT_CNTL 0x01 /* Set to 1 if a control packet */
-/* Types of control packets */
-#define DN_RT_CNTL_MSK 0x0f /* Mask for control packets */
-#define DN_RT_PKT_INIT 0x01 /* Initialisation packet */
-#define DN_RT_PKT_VERI 0x03 /* Verification Message */
-#define DN_RT_PKT_HELO 0x05 /* Hello and Test Message */
-#define DN_RT_PKT_L1RT 0x07 /* Level 1 Routing Message */
-#define DN_RT_PKT_L2RT 0x09 /* Level 2 Routing Message */
-#define DN_RT_PKT_ERTH 0x0b /* Ethernet Router Hello */
-#define DN_RT_PKT_EEDH 0x0d /* Ethernet EndNode Hello */
-
-/* Values for info field in hello message */
-#define DN_RT_INFO_TYPE 0x03 /* Type mask */
-#define DN_RT_INFO_L1RT 0x02 /* L1 Router */
-#define DN_RT_INFO_L2RT 0x01 /* L2 Router */
-#define DN_RT_INFO_ENDN 0x03 /* EndNode */
-#define DN_RT_INFO_VERI 0x04 /* Verification Reqd. */
-#define DN_RT_INFO_RJCT 0x08 /* Reject Flag, Reserved */
-#define DN_RT_INFO_VFLD 0x10 /* Verification Failed, Reserved */
-#define DN_RT_INFO_NOML 0x20 /* No Multicast traffic accepted */
-#define DN_RT_INFO_BLKR 0x40 /* Blocking Requested */
-
-/*
- * The fl structure is what we used to look up the route.
- * The rt_saddr & rt_daddr entries are the same as key.saddr & key.daddr
- * except for local input routes, where the rt_saddr = fl.fld_dst and
- * rt_daddr = fl.fld_src to allow the route to be used for returning
- * packets to the originating host.
- */
-struct dn_route {
- struct dst_entry dst;
- struct dn_route __rcu *dn_next;
-
- struct neighbour *n;
-
- struct flowidn fld;
-
- __le16 rt_saddr;
- __le16 rt_daddr;
- __le16 rt_gateway;
- __le16 rt_local_src; /* Source used for forwarding packets */
- __le16 rt_src_map;
- __le16 rt_dst_map;
-
- unsigned int rt_flags;
- unsigned int rt_type;
-};
-
-static inline bool dn_is_input_route(struct dn_route *rt)
-{
- return rt->fld.flowidn_iif != 0;
-}
-
-static inline bool dn_is_output_route(struct dn_route *rt)
-{
- return rt->fld.flowidn_iif == 0;
-}
-
-void dn_route_init(void);
-void dn_route_cleanup(void);
-
-#include <net/sock.h>
-#include <linux/if_arp.h>
-
-static inline void dn_rt_send(struct sk_buff *skb)
-{
- dev_queue_xmit(skb);
-}
-
-static inline void dn_rt_finish_output(struct sk_buff *skb, char *dst, char *src)
-{
- struct net_device *dev = skb->dev;
-
- if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
- dst = NULL;
-
- if (dev_hard_header(skb, dev, ETH_P_DNA_RT, dst, src, skb->len) >= 0)
- dn_rt_send(skb);
- else
- kfree_skb(skb);
-}
-
-#endif /* _NET_DN_ROUTE_H */
#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
struct nf_hook_entries __rcu *hooks_bridge[NF_INET_NUMHOOKS];
#endif
-#if IS_ENABLED(CONFIG_DECNET)
- struct nf_hook_entries __rcu *hooks_decnet[NF_DN_NUMHOOKS];
-#endif
#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV4)
unsigned int defrag_ipv4_users;
#endif
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef _LINUX_DN_H
-#define _LINUX_DN_H
-
-#include <linux/ioctl.h>
-#include <linux/types.h>
-#include <linux/if_ether.h>
-
-/*
-
- DECnet Data Structures and Constants
-
-*/
-
-/*
- * DNPROTO_NSP can't be the same as SOL_SOCKET,
- * so increment each by one (compared to ULTRIX)
- */
-#define DNPROTO_NSP 2 /* NSP protocol number */
-#define DNPROTO_ROU 3 /* Routing protocol number */
-#define DNPROTO_NML 4 /* Net mgt protocol number */
-#define DNPROTO_EVL 5 /* Evl protocol number (usr) */
-#define DNPROTO_EVR 6 /* Evl protocol number (evl) */
-#define DNPROTO_NSPT 7 /* NSP trace protocol number */
-
-
-#define DN_ADDL 2
-#define DN_MAXADDL 2 /* ULTRIX headers have 20 here, but pathworks has 2 */
-#define DN_MAXOPTL 16
-#define DN_MAXOBJL 16
-#define DN_MAXACCL 40
-#define DN_MAXALIASL 128
-#define DN_MAXNODEL 256
-#define DNBUFSIZE 65023
-
-/*
- * SET/GET Socket options - must match the DSO_ numbers below
- */
-#define SO_CONDATA 1
-#define SO_CONACCESS 2
-#define SO_PROXYUSR 3
-#define SO_LINKINFO 7
-
-#define DSO_CONDATA 1 /* Set/Get connect data */
-#define DSO_DISDATA 10 /* Set/Get disconnect data */
-#define DSO_CONACCESS 2 /* Set/Get connect access data */
-#define DSO_ACCEPTMODE 4 /* Set/Get accept mode */
-#define DSO_CONACCEPT 5 /* Accept deferred connection */
-#define DSO_CONREJECT 6 /* Reject deferred connection */
-#define DSO_LINKINFO 7 /* Set/Get link information */
-#define DSO_STREAM 8 /* Set socket type to stream */
-#define DSO_SEQPACKET 9 /* Set socket type to sequenced packet */
-#define DSO_MAXWINDOW 11 /* Maximum window size allowed */
-#define DSO_NODELAY 12 /* Turn off nagle */
-#define DSO_CORK 13 /* Wait for more data! */
-#define DSO_SERVICES 14 /* NSP Services field */
-#define DSO_INFO 15 /* NSP Info field */
-#define DSO_MAX 15 /* Maximum option number */
-
-
-/* LINK States */
-#define LL_INACTIVE 0
-#define LL_CONNECTING 1
-#define LL_RUNNING 2
-#define LL_DISCONNECTING 3
-
-#define ACC_IMMED 0
-#define ACC_DEFER 1
-
-#define SDF_WILD 1 /* Wild card object */
-#define SDF_PROXY 2 /* Addr eligible for proxy */
-#define SDF_UICPROXY 4 /* Use uic-based proxy */
-
-/* Structures */
-
-
-struct dn_naddr {
- __le16 a_len;
- __u8 a_addr[DN_MAXADDL]; /* Two bytes little endian */
-};
-
-struct sockaddr_dn {
- __u16 sdn_family;
- __u8 sdn_flags;
- __u8 sdn_objnum;
- __le16 sdn_objnamel;
- __u8 sdn_objname[DN_MAXOBJL];
- struct dn_naddr sdn_add;
-};
-#define sdn_nodeaddrl sdn_add.a_len /* Node address length */
-#define sdn_nodeaddr sdn_add.a_addr /* Node address */
-
-
-
-/*
- * DECnet set/get DSO_CONDATA, DSO_DISDATA (optional data) structure
- */
-struct optdata_dn {
- __le16 opt_status; /* Extended status return */
-#define opt_sts opt_status
- __le16 opt_optl; /* Length of user data */
- __u8 opt_data[16]; /* User data */
-};
-
-struct accessdata_dn {
- __u8 acc_accl;
- __u8 acc_acc[DN_MAXACCL];
- __u8 acc_passl;
- __u8 acc_pass[DN_MAXACCL];
- __u8 acc_userl;
- __u8 acc_user[DN_MAXACCL];
-};
-
-/*
- * DECnet logical link information structure
- */
-struct linkinfo_dn {
- __u16 idn_segsize; /* Segment size for link */
- __u8 idn_linkstate; /* Logical link state */
-};
-
-/*
- * Ethernet address format (for DECnet)
- */
-union etheraddress {
- __u8 dne_addr[ETH_ALEN]; /* Full ethernet address */
- struct {
- __u8 dne_hiord[4]; /* DECnet HIORD prefix */
- __u8 dne_nodeaddr[2]; /* DECnet node address */
- } dne_remote;
-};
-
-
-/*
- * DECnet physical socket address format
- */
-struct dn_addr {
- __le16 dna_family; /* AF_DECnet */
- union etheraddress dna_netaddr; /* DECnet ethernet address */
-};
-
-#define DECNET_IOCTL_BASE 0x89 /* PROTOPRIVATE range */
-
-#define SIOCSNETADDR _IOW(DECNET_IOCTL_BASE, 0xe0, struct dn_naddr)
-#define SIOCGNETADDR _IOR(DECNET_IOCTL_BASE, 0xe1, struct dn_naddr)
-#define OSIOCSNETADDR _IOW(DECNET_IOCTL_BASE, 0xe0, int)
-#define OSIOCGNETADDR _IOR(DECNET_IOCTL_BASE, 0xe1, int)
-
-#endif /* _LINUX_DN_H */
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef __LINUX_DECNET_NETFILTER_H
-#define __LINUX_DECNET_NETFILTER_H
-
-/* DECnet-specific defines for netfilter.
- * This file (C) Steve Whitehouse 1999 derived from the
- * ipv4 netfilter header file which is
- * (C)1998 Rusty Russell -- This code is GPL.
- */
-
-#include <linux/netfilter.h>
-
-/* only for userspace compatibility */
-#ifndef __KERNEL__
-
-#include <limits.h> /* for INT_MIN, INT_MAX */
-
-/* kernel define is in netfilter_defs.h */
-#define NF_DN_NUMHOOKS 7
-#endif /* ! __KERNEL__ */
-
-/* DECnet Hooks */
-/* After promisc drops, checksum checks. */
-#define NF_DN_PRE_ROUTING 0
-/* If the packet is destined for this box. */
-#define NF_DN_LOCAL_IN 1
-/* If the packet is destined for another interface. */
-#define NF_DN_FORWARD 2
-/* Packets coming from a local process. */
-#define NF_DN_LOCAL_OUT 3
-/* Packets about to hit the wire. */
-#define NF_DN_POST_ROUTING 4
-/* Input Hello Packets */
-#define NF_DN_HELLO 5
-/* Input Routing Packets */
-#define NF_DN_ROUTE 6
-
-enum nf_dn_hook_priorities {
- NF_DN_PRI_FIRST = INT_MIN,
- NF_DN_PRI_CONNTRACK = -200,
- NF_DN_PRI_MANGLE = -150,
- NF_DN_PRI_NAT_DST = -100,
- NF_DN_PRI_FILTER = 0,
- NF_DN_PRI_NAT_SRC = 100,
- NF_DN_PRI_DNRTMSG = 200,
- NF_DN_PRI_LAST = INT_MAX,
-};
-
-struct nf_dn_rtmsg {
- int nfdn_ifindex;
-};
-
-#define NFDN_RTMSG(r) ((unsigned char *)(r) + NLMSG_ALIGN(sizeof(struct nf_dn_rtmsg)))
-
-#ifndef __KERNEL__
-/* backwards compatibility for userspace */
-#define DNRMG_L1_GROUP 0x01
-#define DNRMG_L2_GROUP 0x02
-#endif
-
-enum {
- DNRNG_NLGRP_NONE,
-#define DNRNG_NLGRP_NONE DNRNG_NLGRP_NONE
- DNRNG_NLGRP_L1,
-#define DNRNG_NLGRP_L1 DNRNG_NLGRP_L1
- DNRNG_NLGRP_L2,
-#define DNRNG_NLGRP_L2 DNRNG_NLGRP_L2
- __DNRNG_NLGRP_MAX
-};
-#define DNRNG_NLGRP_MAX (__DNRNG_NLGRP_MAX - 1)
-
-#endif /*__LINUX_DECNET_NETFILTER_H*/
#define NETLINK_CONNECTOR 11
#define NETLINK_NETFILTER 12 /* netfilter subsystem */
#define NETLINK_IP6_FW 13
-#define NETLINK_DNRTMSG 14 /* DECnet routing messages */
+#define NETLINK_DNRTMSG 14 /* DECnet routing messages (obsolete) */
#define NETLINK_KOBJECT_UEVENT 15 /* Kernel messages to userspace */
#define NETLINK_GENERIC 16
/* leave room for NETLINK_DM (DM Events) */
source "net/netfilter/Kconfig"
source "net/ipv4/netfilter/Kconfig"
source "net/ipv6/netfilter/Kconfig"
-source "net/decnet/netfilter/Kconfig"
source "net/bridge/netfilter/Kconfig"
endif
source "net/bridge/Kconfig"
source "net/dsa/Kconfig"
source "net/8021q/Kconfig"
-source "net/decnet/Kconfig"
source "net/llc/Kconfig"
source "drivers/net/appletalk/Kconfig"
source "net/x25/Kconfig"
obj-$(CONFIG_STREAM_PARSER) += strparser/
obj-$(CONFIG_ATM) += atm/
obj-$(CONFIG_L2TP) += l2tp/
-obj-$(CONFIG_DECNET) += decnet/
obj-$(CONFIG_PHONET) += phonet/
ifneq ($(CONFIG_VLAN_8021Q),)
obj-y += 8021q/
BUG_ON(!list_empty(&dev->ptype_specific));
WARN_ON(rcu_access_pointer(dev->ip_ptr));
WARN_ON(rcu_access_pointer(dev->ip6_ptr));
-#if IS_ENABLED(CONFIG_DECNET)
- WARN_ON(dev->dn_ptr);
-#endif
+
if (dev->priv_destructor)
dev->priv_destructor(dev);
if (dev->needs_free_netdev)
case AF_INET6:
tbl = neigh_tables[NEIGH_ND_TABLE];
break;
- case AF_DECnet:
- tbl = neigh_tables[NEIGH_DN_TABLE];
- break;
}
return tbl;
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# DECnet configuration
-#
-config DECNET
- tristate "DECnet Support"
- help
- The DECnet networking protocol was used in many products made by
- Digital (now Compaq). It provides reliable stream and sequenced
- packet communications over which run a variety of services similar
- to those which run over TCP/IP.
-
- To find some tools to use with the kernel layer support, please
- look at Patrick Caulfield's web site:
- <http://linux-decnet.sourceforge.net/>.
-
- More detailed documentation is available in
- <file:Documentation/networking/decnet.rst>.
-
- Be sure to say Y to "/proc file system support" and "Sysctl support"
- below when using DECnet, since you will need sysctl support to aid
- in configuration at run time.
-
- The DECnet code is also available as a module ( = code which can be
- inserted in and removed from the running kernel whenever you want).
- The module is called decnet.
-
-config DECNET_ROUTER
- bool "DECnet: router support"
- depends on DECNET
- select FIB_RULES
- help
- Add support for turning your DECnet Endnode into a level 1 or 2
- router. This is an experimental, but functional option. If you
- do say Y here, then make sure that you also say Y to "Kernel/User
- network link driver", "Routing messages" and "Network packet
- filtering". The first two are required to allow configuration via
- rtnetlink (you will need Alexey Kuznetsov's iproute2 package
- from <ftp://ftp.tux.org/pub/net/ip-routing/>). The "Network packet
- filtering" option will be required for the forthcoming routing daemon
- to work.
-
- See <file:Documentation/networking/decnet.rst> for more information.
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0
-
-obj-$(CONFIG_DECNET) += decnet.o
-
-decnet-y := af_decnet.o dn_nsp_in.o dn_nsp_out.o \
- dn_route.o dn_dev.o dn_neigh.o dn_timer.o
-decnet-$(CONFIG_DECNET_ROUTER) += dn_fib.o dn_rules.o dn_table.o
-decnet-y += sysctl_net_decnet.o
-
-obj-$(CONFIG_NETFILTER) += netfilter/
+++ /dev/null
- Linux DECnet Project
- ======================
-
-The documentation for this kernel subsystem is available in the
-Documentation/networking subdirectory of this distribution and also
-on line at http://www.chygwyn.com/DECnet/
-
-Steve Whitehouse <SteveW@ACM.org>
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-/*
- * DECnet An implementation of the DECnet protocol suite for the LINUX
- * operating system. DECnet is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * DECnet Socket Layer Interface
- *
- * Authors: Eduardo Marcelo Serrat <emserrat@geocities.com>
- * Patrick Caulfield <patrick@pandh.demon.co.uk>
- *
- * Changes:
- * Steve Whitehouse: Copied from Eduardo Serrat and Patrick Caulfield's
- * version of the code. Original copyright preserved
- * below.
- * Steve Whitehouse: Some bug fixes, cleaning up some code to make it
- * compatible with my routing layer.
- * Steve Whitehouse: Merging changes from Eduardo Serrat and Patrick
- * Caulfield.
- * Steve Whitehouse: Further bug fixes, checking module code still works
- * with new routing layer.
- * Steve Whitehouse: Additional set/get_sockopt() calls.
- * Steve Whitehouse: Fixed TIOCINQ ioctl to be same as Eduardo's new
- * code.
- * Steve Whitehouse: recvmsg() changed to try and behave in a POSIX like
- * way. Didn't manage it entirely, but its better.
- * Steve Whitehouse: ditto for sendmsg().
- * Steve Whitehouse: A selection of bug fixes to various things.
- * Steve Whitehouse: Added TIOCOUTQ ioctl.
- * Steve Whitehouse: Fixes to username2sockaddr & sockaddr2username.
- * Steve Whitehouse: Fixes to connect() error returns.
- * Patrick Caulfield: Fixes to delayed acceptance logic.
- * David S. Miller: New socket locking
- * Steve Whitehouse: Socket list hashing/locking
- * Arnaldo C. Melo: use capable, not suser
- * Steve Whitehouse: Removed unused code. Fix to use sk->allocation
- * when required.
- * Patrick Caulfield: /proc/net/decnet now has object name/number
- * Steve Whitehouse: Fixed local port allocation, hashed sk list
- * Matthew Wilcox: Fixes for dn_ioctl()
- * Steve Whitehouse: New connect/accept logic to allow timeouts and
- * prepare for sendpage etc.
- */
-
-
-/******************************************************************************
- (c) 1995-1998 E.M. Serrat emserrat@geocities.com
-
-
-HISTORY:
-
-Version Kernel Date Author/Comments
-------- ------ ---- ---------------
-Version 0.0.1 2.0.30 01-dic-97 Eduardo Marcelo Serrat
- (emserrat@geocities.com)
-
- First Development of DECnet Socket La-
- yer for Linux. Only supports outgoing
- connections.
-
-Version 0.0.2 2.1.105 20-jun-98 Patrick J. Caulfield
- (patrick@pandh.demon.co.uk)
-
- Port to new kernel development version.
-
-Version 0.0.3 2.1.106 25-jun-98 Eduardo Marcelo Serrat
- (emserrat@geocities.com)
- _
- Added support for incoming connections
- so we can start developing server apps
- on Linux.
- -
- Module Support
-Version 0.0.4 2.1.109 21-jul-98 Eduardo Marcelo Serrat
- (emserrat@geocities.com)
- _
- Added support for X11R6.4. Now we can
- use DECnet transport for X on Linux!!!
- -
-Version 0.0.5 2.1.110 01-aug-98 Eduardo Marcelo Serrat
- (emserrat@geocities.com)
- Removed bugs on flow control
- Removed bugs on incoming accessdata
- order
- -
-Version 0.0.6 2.1.110 07-aug-98 Eduardo Marcelo Serrat
- dn_recvmsg fixes
-
- Patrick J. Caulfield
- dn_bind fixes
-*******************************************************************************/
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/sched/signal.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/netdevice.h>
-#include <linux/inet.h>
-#include <linux/route.h>
-#include <linux/netfilter.h>
-#include <linux/seq_file.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <net/flow.h>
-#include <asm/ioctls.h>
-#include <linux/capability.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/proc_fs.h>
-#include <linux/stat.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/jiffies.h>
-#include <net/net_namespace.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/fib_rules.h>
-#include <net/tcp.h>
-#include <net/dn.h>
-#include <net/dn_nsp.h>
-#include <net/dn_dev.h>
-#include <net/dn_route.h>
-#include <net/dn_fib.h>
-#include <net/dn_neigh.h>
-
-struct dn_sock {
- struct sock sk;
- struct dn_scp scp;
-};
-
-static void dn_keepalive(struct sock *sk);
-
-#define DN_SK_HASH_SHIFT 8
-#define DN_SK_HASH_SIZE (1 << DN_SK_HASH_SHIFT)
-#define DN_SK_HASH_MASK (DN_SK_HASH_SIZE - 1)
-
-
-static const struct proto_ops dn_proto_ops;
-static DEFINE_RWLOCK(dn_hash_lock);
-static struct hlist_head dn_sk_hash[DN_SK_HASH_SIZE];
-static struct hlist_head dn_wild_sk;
-static atomic_long_t decnet_memory_allocated;
-static DEFINE_PER_CPU(int, decnet_memory_per_cpu_fw_alloc);
-
-static int __dn_setsockopt(struct socket *sock, int level, int optname,
- sockptr_t optval, unsigned int optlen, int flags);
-static int __dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen, int flags);
-
-static struct hlist_head *dn_find_list(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- if (scp->addr.sdn_flags & SDF_WILD)
- return hlist_empty(&dn_wild_sk) ? &dn_wild_sk : NULL;
-
- return &dn_sk_hash[le16_to_cpu(scp->addrloc) & DN_SK_HASH_MASK];
-}
-
-/*
- * Valid ports are those greater than zero and not already in use.
- */
-static int check_port(__le16 port)
-{
- struct sock *sk;
-
- if (port == 0)
- return -1;
-
- sk_for_each(sk, &dn_sk_hash[le16_to_cpu(port) & DN_SK_HASH_MASK]) {
- struct dn_scp *scp = DN_SK(sk);
- if (scp->addrloc == port)
- return -1;
- }
- return 0;
-}
-
-static unsigned short port_alloc(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
- static unsigned short port = 0x2000;
- unsigned short i_port = port;
-
- while(check_port(cpu_to_le16(++port)) != 0) {
- if (port == i_port)
- return 0;
- }
-
- scp->addrloc = cpu_to_le16(port);
-
- return 1;
-}
-
-/*
- * Since this is only ever called from user
- * level, we don't need a write_lock() version
- * of this.
- */
-static int dn_hash_sock(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
- struct hlist_head *list;
- int rv = -EUSERS;
-
- BUG_ON(sk_hashed(sk));
-
- write_lock_bh(&dn_hash_lock);
-
- if (!scp->addrloc && !port_alloc(sk))
- goto out;
-
- rv = -EADDRINUSE;
- if ((list = dn_find_list(sk)) == NULL)
- goto out;
-
- sk_add_node(sk, list);
- rv = 0;
-out:
- write_unlock_bh(&dn_hash_lock);
- return rv;
-}
-
-static void dn_unhash_sock(struct sock *sk)
-{
- write_lock(&dn_hash_lock);
- sk_del_node_init(sk);
- write_unlock(&dn_hash_lock);
-}
-
-static void dn_unhash_sock_bh(struct sock *sk)
-{
- write_lock_bh(&dn_hash_lock);
- sk_del_node_init(sk);
- write_unlock_bh(&dn_hash_lock);
-}
-
-static struct hlist_head *listen_hash(struct sockaddr_dn *addr)
-{
- int i;
- unsigned int hash = addr->sdn_objnum;
-
- if (hash == 0) {
- hash = addr->sdn_objnamel;
- for(i = 0; i < le16_to_cpu(addr->sdn_objnamel); i++) {
- hash ^= addr->sdn_objname[i];
- hash ^= (hash << 3);
- }
- }
-
- return &dn_sk_hash[hash & DN_SK_HASH_MASK];
-}
-
-/*
- * Called to transform a socket from bound (i.e. with a local address)
- * into a listening socket (doesn't need a local port number) and rehashes
- * based upon the object name/number.
- */
-static void dn_rehash_sock(struct sock *sk)
-{
- struct hlist_head *list;
- struct dn_scp *scp = DN_SK(sk);
-
- if (scp->addr.sdn_flags & SDF_WILD)
- return;
-
- write_lock_bh(&dn_hash_lock);
- sk_del_node_init(sk);
- DN_SK(sk)->addrloc = 0;
- list = listen_hash(&DN_SK(sk)->addr);
- sk_add_node(sk, list);
- write_unlock_bh(&dn_hash_lock);
-}
-
-int dn_sockaddr2username(struct sockaddr_dn *sdn, unsigned char *buf, unsigned char type)
-{
- int len = 2;
-
- *buf++ = type;
-
- switch (type) {
- case 0:
- *buf++ = sdn->sdn_objnum;
- break;
- case 1:
- *buf++ = 0;
- *buf++ = le16_to_cpu(sdn->sdn_objnamel);
- memcpy(buf, sdn->sdn_objname, le16_to_cpu(sdn->sdn_objnamel));
- len = 3 + le16_to_cpu(sdn->sdn_objnamel);
- break;
- case 2:
- memset(buf, 0, 5);
- buf += 5;
- *buf++ = le16_to_cpu(sdn->sdn_objnamel);
- memcpy(buf, sdn->sdn_objname, le16_to_cpu(sdn->sdn_objnamel));
- len = 7 + le16_to_cpu(sdn->sdn_objnamel);
- break;
- }
-
- return len;
-}
-
-/*
- * On reception of usernames, we handle types 1 and 0 for destination
- * addresses only. Types 2 and 4 are used for source addresses, but the
- * UIC, GIC are ignored and they are both treated the same way. Type 3
- * is never used as I've no idea what its purpose might be or what its
- * format is.
- */
-int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *sdn, unsigned char *fmt)
-{
- unsigned char type;
- int size = len;
- int namel = 12;
-
- sdn->sdn_objnum = 0;
- sdn->sdn_objnamel = cpu_to_le16(0);
- memset(sdn->sdn_objname, 0, DN_MAXOBJL);
-
- if (len < 2)
- return -1;
-
- len -= 2;
- *fmt = *data++;
- type = *data++;
-
- switch (*fmt) {
- case 0:
- sdn->sdn_objnum = type;
- return 2;
- case 1:
- namel = 16;
- break;
- case 2:
- len -= 4;
- data += 4;
- break;
- case 4:
- len -= 8;
- data += 8;
- break;
- default:
- return -1;
- }
-
- len -= 1;
-
- if (len < 0)
- return -1;
-
- sdn->sdn_objnamel = cpu_to_le16(*data++);
- len -= le16_to_cpu(sdn->sdn_objnamel);
-
- if ((len < 0) || (le16_to_cpu(sdn->sdn_objnamel) > namel))
- return -1;
-
- memcpy(sdn->sdn_objname, data, le16_to_cpu(sdn->sdn_objnamel));
-
- return size - len;
-}
-
-struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr)
-{
- struct hlist_head *list = listen_hash(addr);
- struct sock *sk;
-
- read_lock(&dn_hash_lock);
- sk_for_each(sk, list) {
- struct dn_scp *scp = DN_SK(sk);
- if (sk->sk_state != TCP_LISTEN)
- continue;
- if (scp->addr.sdn_objnum) {
- if (scp->addr.sdn_objnum != addr->sdn_objnum)
- continue;
- } else {
- if (addr->sdn_objnum)
- continue;
- if (scp->addr.sdn_objnamel != addr->sdn_objnamel)
- continue;
- if (memcmp(scp->addr.sdn_objname, addr->sdn_objname, le16_to_cpu(addr->sdn_objnamel)) != 0)
- continue;
- }
- sock_hold(sk);
- read_unlock(&dn_hash_lock);
- return sk;
- }
-
- sk = sk_head(&dn_wild_sk);
- if (sk) {
- if (sk->sk_state == TCP_LISTEN)
- sock_hold(sk);
- else
- sk = NULL;
- }
-
- read_unlock(&dn_hash_lock);
- return sk;
-}
-
-struct sock *dn_find_by_skb(struct sk_buff *skb)
-{
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- struct sock *sk;
- struct dn_scp *scp;
-
- read_lock(&dn_hash_lock);
- sk_for_each(sk, &dn_sk_hash[le16_to_cpu(cb->dst_port) & DN_SK_HASH_MASK]) {
- scp = DN_SK(sk);
- if (cb->src != dn_saddr2dn(&scp->peer))
- continue;
- if (cb->dst_port != scp->addrloc)
- continue;
- if (scp->addrrem && (cb->src_port != scp->addrrem))
- continue;
- sock_hold(sk);
- goto found;
- }
- sk = NULL;
-found:
- read_unlock(&dn_hash_lock);
- return sk;
-}
-
-
-
-static void dn_destruct(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- skb_queue_purge(&scp->data_xmit_queue);
- skb_queue_purge(&scp->other_xmit_queue);
- skb_queue_purge(&scp->other_receive_queue);
-
- dst_release(rcu_dereference_protected(sk->sk_dst_cache, 1));
-}
-
-static unsigned long dn_memory_pressure;
-
-static void dn_enter_memory_pressure(struct sock *sk)
-{
- if (!dn_memory_pressure) {
- dn_memory_pressure = 1;
- }
-}
-
-static struct proto dn_proto = {
- .name = "NSP",
- .owner = THIS_MODULE,
- .enter_memory_pressure = dn_enter_memory_pressure,
- .memory_pressure = &dn_memory_pressure,
-
- .memory_allocated = &decnet_memory_allocated,
- .per_cpu_fw_alloc = &decnet_memory_per_cpu_fw_alloc,
-
- .sysctl_mem = sysctl_decnet_mem,
- .sysctl_wmem = sysctl_decnet_wmem,
- .sysctl_rmem = sysctl_decnet_rmem,
- .max_header = DN_MAX_NSP_DATA_HEADER + 64,
- .obj_size = sizeof(struct dn_sock),
-};
-
-static struct sock *dn_alloc_sock(struct net *net, struct socket *sock, gfp_t gfp, int kern)
-{
- struct dn_scp *scp;
- struct sock *sk = sk_alloc(net, PF_DECnet, gfp, &dn_proto, kern);
-
- if (!sk)
- goto out;
-
- if (sock)
- sock->ops = &dn_proto_ops;
- sock_init_data(sock, sk);
-
- sk->sk_backlog_rcv = dn_nsp_backlog_rcv;
- sk->sk_destruct = dn_destruct;
- sk->sk_no_check_tx = 1;
- sk->sk_family = PF_DECnet;
- sk->sk_protocol = 0;
- sk->sk_allocation = gfp;
- sk->sk_sndbuf = READ_ONCE(sysctl_decnet_wmem[1]);
- sk->sk_rcvbuf = READ_ONCE(sysctl_decnet_rmem[1]);
-
- /* Initialization of DECnet Session Control Port */
- scp = DN_SK(sk);
- scp->state = DN_O; /* Open */
- scp->numdat = 1; /* Next data seg to tx */
- scp->numoth = 1; /* Next oth data to tx */
- scp->ackxmt_dat = 0; /* Last data seg ack'ed */
- scp->ackxmt_oth = 0; /* Last oth data ack'ed */
- scp->ackrcv_dat = 0; /* Highest data ack recv*/
- scp->ackrcv_oth = 0; /* Last oth data ack rec*/
- scp->flowrem_sw = DN_SEND;
- scp->flowloc_sw = DN_SEND;
- scp->flowrem_dat = 0;
- scp->flowrem_oth = 1;
- scp->flowloc_dat = 0;
- scp->flowloc_oth = 1;
- scp->services_rem = 0;
- scp->services_loc = 1 | NSP_FC_NONE;
- scp->info_rem = 0;
- scp->info_loc = 0x03; /* NSP version 4.1 */
- scp->segsize_rem = 230 - DN_MAX_NSP_DATA_HEADER; /* Default: Updated by remote segsize */
- scp->nonagle = 0;
- scp->multi_ireq = 1;
- scp->accept_mode = ACC_IMMED;
- scp->addr.sdn_family = AF_DECnet;
- scp->peer.sdn_family = AF_DECnet;
- scp->accessdata.acc_accl = 5;
- memcpy(scp->accessdata.acc_acc, "LINUX", 5);
-
- scp->max_window = NSP_MAX_WINDOW;
- scp->snd_window = NSP_MIN_WINDOW;
- scp->nsp_srtt = NSP_INITIAL_SRTT;
- scp->nsp_rttvar = NSP_INITIAL_RTTVAR;
- scp->nsp_rxtshift = 0;
-
- skb_queue_head_init(&scp->data_xmit_queue);
- skb_queue_head_init(&scp->other_xmit_queue);
- skb_queue_head_init(&scp->other_receive_queue);
-
- scp->persist = 0;
- scp->persist_fxn = NULL;
- scp->keepalive = 10 * HZ;
- scp->keepalive_fxn = dn_keepalive;
-
- dn_start_slow_timer(sk);
-out:
- return sk;
-}
-
-/*
- * Keepalive timer.
- * FIXME: Should respond to SO_KEEPALIVE etc.
- */
-static void dn_keepalive(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- /*
- * By checking the other_data transmit queue is empty
- * we are double checking that we are not sending too
- * many of these keepalive frames.
- */
- if (skb_queue_empty(&scp->other_xmit_queue))
- dn_nsp_send_link(sk, DN_NOCHANGE, 0);
-}
-
-
-/*
- * Timer for shutdown/destroyed sockets.
- * When socket is dead & no packets have been sent for a
- * certain amount of time, they are removed by this
- * routine. Also takes care of sending out DI & DC
- * frames at correct times.
- */
-int dn_destroy_timer(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- scp->persist = dn_nsp_persist(sk);
-
- switch (scp->state) {
- case DN_DI:
- dn_nsp_send_disc(sk, NSP_DISCINIT, 0, GFP_ATOMIC);
- if (scp->nsp_rxtshift >= decnet_di_count)
- scp->state = DN_CN;
- return 0;
-
- case DN_DR:
- dn_nsp_send_disc(sk, NSP_DISCINIT, 0, GFP_ATOMIC);
- if (scp->nsp_rxtshift >= decnet_dr_count)
- scp->state = DN_DRC;
- return 0;
-
- case DN_DN:
- if (scp->nsp_rxtshift < decnet_dn_count) {
- /* printk(KERN_DEBUG "dn_destroy_timer: DN\n"); */
- dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC,
- GFP_ATOMIC);
- return 0;
- }
- }
-
- scp->persist = (HZ * decnet_time_wait);
-
- if (sk->sk_socket)
- return 0;
-
- if (time_after_eq(jiffies, scp->stamp + HZ * decnet_time_wait)) {
- dn_unhash_sock(sk);
- sock_put(sk);
- return 1;
- }
-
- return 0;
-}
-
-static void dn_destroy_sock(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- scp->nsp_rxtshift = 0; /* reset back off */
-
- if (sk->sk_socket) {
- if (sk->sk_socket->state != SS_UNCONNECTED)
- sk->sk_socket->state = SS_DISCONNECTING;
- }
-
- sk->sk_state = TCP_CLOSE;
-
- switch (scp->state) {
- case DN_DN:
- dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC,
- sk->sk_allocation);
- scp->persist_fxn = dn_destroy_timer;
- scp->persist = dn_nsp_persist(sk);
- break;
- case DN_CR:
- scp->state = DN_DR;
- goto disc_reject;
- case DN_RUN:
- scp->state = DN_DI;
- fallthrough;
- case DN_DI:
- case DN_DR:
-disc_reject:
- dn_nsp_send_disc(sk, NSP_DISCINIT, 0, sk->sk_allocation);
- fallthrough;
- case DN_NC:
- case DN_NR:
- case DN_RJ:
- case DN_DIC:
- case DN_CN:
- case DN_DRC:
- case DN_CI:
- case DN_CD:
- scp->persist_fxn = dn_destroy_timer;
- scp->persist = dn_nsp_persist(sk);
- break;
- default:
- printk(KERN_DEBUG "DECnet: dn_destroy_sock passed socket in invalid state\n");
- fallthrough;
- case DN_O:
- dn_stop_slow_timer(sk);
-
- dn_unhash_sock_bh(sk);
- sock_put(sk);
-
- break;
- }
-}
-
-char *dn_addr2asc(__u16 addr, char *buf)
-{
- unsigned short node, area;
-
- node = addr & 0x03ff;
- area = addr >> 10;
- sprintf(buf, "%hd.%hd", area, node);
-
- return buf;
-}
-
-
-
-static int dn_create(struct net *net, struct socket *sock, int protocol,
- int kern)
-{
- struct sock *sk;
-
- if (protocol < 0 || protocol > U8_MAX)
- return -EINVAL;
-
- if (!net_eq(net, &init_net))
- return -EAFNOSUPPORT;
-
- switch (sock->type) {
- case SOCK_SEQPACKET:
- if (protocol != DNPROTO_NSP)
- return -EPROTONOSUPPORT;
- break;
- case SOCK_STREAM:
- break;
- default:
- return -ESOCKTNOSUPPORT;
- }
-
-
- if ((sk = dn_alloc_sock(net, sock, GFP_KERNEL, kern)) == NULL)
- return -ENOBUFS;
-
- sk->sk_protocol = protocol;
-
- return 0;
-}
-
-
-static int
-dn_release(struct socket *sock)
-{
- struct sock *sk = sock->sk;
-
- if (sk) {
- sock_orphan(sk);
- sock_hold(sk);
- lock_sock(sk);
- dn_destroy_sock(sk);
- release_sock(sk);
- sock_put(sk);
- }
-
- return 0;
-}
-
-static int dn_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- struct sockaddr_dn *saddr = (struct sockaddr_dn *)uaddr;
- struct net_device *dev, *ldev;
- int rv;
-
- if (addr_len != sizeof(struct sockaddr_dn))
- return -EINVAL;
-
- if (saddr->sdn_family != AF_DECnet)
- return -EINVAL;
-
- if (le16_to_cpu(saddr->sdn_nodeaddrl) && (le16_to_cpu(saddr->sdn_nodeaddrl) != 2))
- return -EINVAL;
-
- if (le16_to_cpu(saddr->sdn_objnamel) > DN_MAXOBJL)
- return -EINVAL;
-
- if (saddr->sdn_flags & ~SDF_WILD)
- return -EINVAL;
-
- if (!capable(CAP_NET_BIND_SERVICE) && (saddr->sdn_objnum ||
- (saddr->sdn_flags & SDF_WILD)))
- return -EACCES;
-
- if (!(saddr->sdn_flags & SDF_WILD)) {
- if (le16_to_cpu(saddr->sdn_nodeaddrl)) {
- rcu_read_lock();
- ldev = NULL;
- for_each_netdev_rcu(&init_net, dev) {
- if (!dev->dn_ptr)
- continue;
- if (dn_dev_islocal(dev, dn_saddr2dn(saddr))) {
- ldev = dev;
- break;
- }
- }
- rcu_read_unlock();
- if (ldev == NULL)
- return -EADDRNOTAVAIL;
- }
- }
-
- rv = -EINVAL;
- lock_sock(sk);
- if (sock_flag(sk, SOCK_ZAPPED)) {
- memcpy(&scp->addr, saddr, addr_len);
- sock_reset_flag(sk, SOCK_ZAPPED);
-
- rv = dn_hash_sock(sk);
- if (rv)
- sock_set_flag(sk, SOCK_ZAPPED);
- }
- release_sock(sk);
-
- return rv;
-}
-
-
-static int dn_auto_bind(struct socket *sock)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- int rv;
-
- sock_reset_flag(sk, SOCK_ZAPPED);
-
- scp->addr.sdn_flags = 0;
- scp->addr.sdn_objnum = 0;
-
- /*
- * This stuff is to keep compatibility with Eduardo's
- * patch. I hope I can dispense with it shortly...
- */
- if ((scp->accessdata.acc_accl != 0) &&
- (scp->accessdata.acc_accl <= 12)) {
-
- scp->addr.sdn_objnamel = cpu_to_le16(scp->accessdata.acc_accl);
- memcpy(scp->addr.sdn_objname, scp->accessdata.acc_acc, le16_to_cpu(scp->addr.sdn_objnamel));
-
- scp->accessdata.acc_accl = 0;
- memset(scp->accessdata.acc_acc, 0, 40);
- }
- /* End of compatibility stuff */
-
- scp->addr.sdn_add.a_len = cpu_to_le16(2);
- rv = dn_dev_bind_default((__le16 *)scp->addr.sdn_add.a_addr);
- if (rv == 0) {
- rv = dn_hash_sock(sk);
- if (rv)
- sock_set_flag(sk, SOCK_ZAPPED);
- }
-
- return rv;
-}
-
-static int dn_confirm_accept(struct sock *sk, long *timeo, gfp_t allocation)
-{
- struct dn_scp *scp = DN_SK(sk);
- DEFINE_WAIT_FUNC(wait, woken_wake_function);
- int err;
-
- if (scp->state != DN_CR)
- return -EINVAL;
-
- scp->state = DN_CC;
- scp->segsize_loc = dst_metric_advmss(__sk_dst_get(sk));
- dn_send_conn_conf(sk, allocation);
-
- add_wait_queue(sk_sleep(sk), &wait);
- for(;;) {
- release_sock(sk);
- if (scp->state == DN_CC)
- *timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, *timeo);
- lock_sock(sk);
- err = 0;
- if (scp->state == DN_RUN)
- break;
- err = sock_error(sk);
- if (err)
- break;
- err = sock_intr_errno(*timeo);
- if (signal_pending(current))
- break;
- err = -EAGAIN;
- if (!*timeo)
- break;
- }
- remove_wait_queue(sk_sleep(sk), &wait);
- if (err == 0) {
- sk->sk_socket->state = SS_CONNECTED;
- } else if (scp->state != DN_CC) {
- sk->sk_socket->state = SS_UNCONNECTED;
- }
- return err;
-}
-
-static int dn_wait_run(struct sock *sk, long *timeo)
-{
- struct dn_scp *scp = DN_SK(sk);
- DEFINE_WAIT_FUNC(wait, woken_wake_function);
- int err = 0;
-
- if (scp->state == DN_RUN)
- goto out;
-
- if (!*timeo)
- return -EALREADY;
-
- add_wait_queue(sk_sleep(sk), &wait);
- for(;;) {
- release_sock(sk);
- if (scp->state == DN_CI || scp->state == DN_CC)
- *timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, *timeo);
- lock_sock(sk);
- err = 0;
- if (scp->state == DN_RUN)
- break;
- err = sock_error(sk);
- if (err)
- break;
- err = sock_intr_errno(*timeo);
- if (signal_pending(current))
- break;
- err = -ETIMEDOUT;
- if (!*timeo)
- break;
- }
- remove_wait_queue(sk_sleep(sk), &wait);
-out:
- if (err == 0) {
- sk->sk_socket->state = SS_CONNECTED;
- } else if (scp->state != DN_CI && scp->state != DN_CC) {
- sk->sk_socket->state = SS_UNCONNECTED;
- }
- return err;
-}
-
-static int __dn_connect(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags)
-{
- struct socket *sock = sk->sk_socket;
- struct dn_scp *scp = DN_SK(sk);
- int err = -EISCONN;
- struct flowidn fld;
- struct dst_entry *dst;
-
- if (sock->state == SS_CONNECTED)
- goto out;
-
- if (sock->state == SS_CONNECTING) {
- err = 0;
- if (scp->state == DN_RUN) {
- sock->state = SS_CONNECTED;
- goto out;
- }
- err = -ECONNREFUSED;
- if (scp->state != DN_CI && scp->state != DN_CC) {
- sock->state = SS_UNCONNECTED;
- goto out;
- }
- return dn_wait_run(sk, timeo);
- }
-
- err = -EINVAL;
- if (scp->state != DN_O)
- goto out;
-
- if (addr == NULL || addrlen != sizeof(struct sockaddr_dn))
- goto out;
- if (addr->sdn_family != AF_DECnet)
- goto out;
- if (addr->sdn_flags & SDF_WILD)
- goto out;
-
- if (sock_flag(sk, SOCK_ZAPPED)) {
- err = dn_auto_bind(sk->sk_socket);
- if (err)
- goto out;
- }
-
- memcpy(&scp->peer, addr, sizeof(struct sockaddr_dn));
-
- err = -EHOSTUNREACH;
- memset(&fld, 0, sizeof(fld));
- fld.flowidn_oif = sk->sk_bound_dev_if;
- fld.daddr = dn_saddr2dn(&scp->peer);
- fld.saddr = dn_saddr2dn(&scp->addr);
- dn_sk_ports_copy(&fld, scp);
- fld.flowidn_proto = DNPROTO_NSP;
- if (dn_route_output_sock(&sk->sk_dst_cache, &fld, sk, flags) < 0)
- goto out;
- dst = __sk_dst_get(sk);
- sk->sk_route_caps = dst->dev->features;
- sock->state = SS_CONNECTING;
- scp->state = DN_CI;
- scp->segsize_loc = dst_metric_advmss(dst);
-
- dn_nsp_send_conninit(sk, NSP_CI);
- err = -EINPROGRESS;
- if (*timeo) {
- err = dn_wait_run(sk, timeo);
- }
-out:
- return err;
-}
-
-static int dn_connect(struct socket *sock, struct sockaddr *uaddr, int addrlen, int flags)
-{
- struct sockaddr_dn *addr = (struct sockaddr_dn *)uaddr;
- struct sock *sk = sock->sk;
- int err;
- long timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
-
- lock_sock(sk);
- err = __dn_connect(sk, addr, addrlen, &timeo, 0);
- release_sock(sk);
-
- return err;
-}
-
-static inline int dn_check_state(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- switch (scp->state) {
- case DN_RUN:
- return 0;
- case DN_CR:
- return dn_confirm_accept(sk, timeo, sk->sk_allocation);
- case DN_CI:
- case DN_CC:
- return dn_wait_run(sk, timeo);
- case DN_O:
- return __dn_connect(sk, addr, addrlen, timeo, flags);
- }
-
- return -EINVAL;
-}
-
-
-static void dn_access_copy(struct sk_buff *skb, struct accessdata_dn *acc)
-{
- unsigned char *ptr = skb->data;
-
- acc->acc_userl = *ptr++;
- memcpy(&acc->acc_user, ptr, acc->acc_userl);
- ptr += acc->acc_userl;
-
- acc->acc_passl = *ptr++;
- memcpy(&acc->acc_pass, ptr, acc->acc_passl);
- ptr += acc->acc_passl;
-
- acc->acc_accl = *ptr++;
- memcpy(&acc->acc_acc, ptr, acc->acc_accl);
-
- skb_pull(skb, acc->acc_accl + acc->acc_passl + acc->acc_userl + 3);
-
-}
-
-static void dn_user_copy(struct sk_buff *skb, struct optdata_dn *opt)
-{
- unsigned char *ptr = skb->data;
- u16 len = *ptr++; /* yes, it's 8bit on the wire */
-
- BUG_ON(len > 16); /* we've checked the contents earlier */
- opt->opt_optl = cpu_to_le16(len);
- opt->opt_status = 0;
- memcpy(opt->opt_data, ptr, len);
- skb_pull(skb, len + 1);
-}
-
-static struct sk_buff *dn_wait_for_connect(struct sock *sk, long *timeo)
-{
- DEFINE_WAIT_FUNC(wait, woken_wake_function);
- struct sk_buff *skb = NULL;
- int err = 0;
-
- add_wait_queue(sk_sleep(sk), &wait);
- for(;;) {
- release_sock(sk);
- skb = skb_dequeue(&sk->sk_receive_queue);
- if (skb == NULL) {
- *timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, *timeo);
- skb = skb_dequeue(&sk->sk_receive_queue);
- }
- lock_sock(sk);
- if (skb != NULL)
- break;
- err = -EINVAL;
- if (sk->sk_state != TCP_LISTEN)
- break;
- err = sock_intr_errno(*timeo);
- if (signal_pending(current))
- break;
- err = -EAGAIN;
- if (!*timeo)
- break;
- }
- remove_wait_queue(sk_sleep(sk), &wait);
-
- return skb == NULL ? ERR_PTR(err) : skb;
-}
-
-static int dn_accept(struct socket *sock, struct socket *newsock, int flags,
- bool kern)
-{
- struct sock *sk = sock->sk, *newsk;
- struct sk_buff *skb = NULL;
- struct dn_skb_cb *cb;
- unsigned char menuver;
- int err = 0;
- unsigned char type;
- long timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
- struct dst_entry *dst;
-
- lock_sock(sk);
-
- if (sk->sk_state != TCP_LISTEN || DN_SK(sk)->state != DN_O) {
- release_sock(sk);
- return -EINVAL;
- }
-
- skb = skb_dequeue(&sk->sk_receive_queue);
- if (skb == NULL) {
- skb = dn_wait_for_connect(sk, &timeo);
- if (IS_ERR(skb)) {
- release_sock(sk);
- return PTR_ERR(skb);
- }
- }
-
- cb = DN_SKB_CB(skb);
- sk_acceptq_removed(sk);
- newsk = dn_alloc_sock(sock_net(sk), newsock, sk->sk_allocation, kern);
- if (newsk == NULL) {
- release_sock(sk);
- kfree_skb(skb);
- return -ENOBUFS;
- }
- release_sock(sk);
-
- dst = skb_dst(skb);
- sk_dst_set(newsk, dst);
- skb_dst_set(skb, NULL);
-
- DN_SK(newsk)->state = DN_CR;
- DN_SK(newsk)->addrrem = cb->src_port;
- DN_SK(newsk)->services_rem = cb->services;
- DN_SK(newsk)->info_rem = cb->info;
- DN_SK(newsk)->segsize_rem = cb->segsize;
- DN_SK(newsk)->accept_mode = DN_SK(sk)->accept_mode;
-
- if (DN_SK(newsk)->segsize_rem < 230)
- DN_SK(newsk)->segsize_rem = 230;
-
- if ((DN_SK(newsk)->services_rem & NSP_FC_MASK) == NSP_FC_NONE)
- DN_SK(newsk)->max_window = decnet_no_fc_max_cwnd;
-
- newsk->sk_state = TCP_LISTEN;
- memcpy(&(DN_SK(newsk)->addr), &(DN_SK(sk)->addr), sizeof(struct sockaddr_dn));
-
- /*
- * If we are listening on a wild socket, we don't want
- * the newly created socket on the wrong hash queue.
- */
- DN_SK(newsk)->addr.sdn_flags &= ~SDF_WILD;
-
- skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->addr), &type));
- skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->peer), &type));
- *(__le16 *)(DN_SK(newsk)->peer.sdn_add.a_addr) = cb->src;
- *(__le16 *)(DN_SK(newsk)->addr.sdn_add.a_addr) = cb->dst;
-
- menuver = *skb->data;
- skb_pull(skb, 1);
-
- if (menuver & DN_MENUVER_ACC)
- dn_access_copy(skb, &(DN_SK(newsk)->accessdata));
-
- if (menuver & DN_MENUVER_USR)
- dn_user_copy(skb, &(DN_SK(newsk)->conndata_in));
-
- if (menuver & DN_MENUVER_PRX)
- DN_SK(newsk)->peer.sdn_flags |= SDF_PROXY;
-
- if (menuver & DN_MENUVER_UIC)
- DN_SK(newsk)->peer.sdn_flags |= SDF_UICPROXY;
-
- kfree_skb(skb);
-
- memcpy(&(DN_SK(newsk)->conndata_out), &(DN_SK(sk)->conndata_out),
- sizeof(struct optdata_dn));
- memcpy(&(DN_SK(newsk)->discdata_out), &(DN_SK(sk)->discdata_out),
- sizeof(struct optdata_dn));
-
- lock_sock(newsk);
- err = dn_hash_sock(newsk);
- if (err == 0) {
- sock_reset_flag(newsk, SOCK_ZAPPED);
- dn_send_conn_ack(newsk);
-
- /*
- * Here we use sk->sk_allocation since although the conn conf is
- * for the newsk, the context is the old socket.
- */
- if (DN_SK(newsk)->accept_mode == ACC_IMMED)
- err = dn_confirm_accept(newsk, &timeo,
- sk->sk_allocation);
- }
- release_sock(newsk);
- return err;
-}
-
-
-static int dn_getname(struct socket *sock, struct sockaddr *uaddr,int peer)
-{
- struct sockaddr_dn *sa = (struct sockaddr_dn *)uaddr;
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
-
- lock_sock(sk);
-
- if (peer) {
- if ((sock->state != SS_CONNECTED &&
- sock->state != SS_CONNECTING) &&
- scp->accept_mode == ACC_IMMED) {
- release_sock(sk);
- return -ENOTCONN;
- }
-
- memcpy(sa, &scp->peer, sizeof(struct sockaddr_dn));
- } else {
- memcpy(sa, &scp->addr, sizeof(struct sockaddr_dn));
- }
-
- release_sock(sk);
-
- return sizeof(struct sockaddr_dn);
-}
-
-
-static __poll_t dn_poll(struct file *file, struct socket *sock, poll_table *wait)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- __poll_t mask = datagram_poll(file, sock, wait);
-
- if (!skb_queue_empty_lockless(&scp->other_receive_queue))
- mask |= EPOLLRDBAND;
-
- return mask;
-}
-
-static int dn_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- int err = -EOPNOTSUPP;
- long amount = 0;
- struct sk_buff *skb;
- int val;
-
- switch(cmd)
- {
- case SIOCGIFADDR:
- case SIOCSIFADDR:
- return dn_dev_ioctl(cmd, (void __user *)arg);
-
- case SIOCATMARK:
- lock_sock(sk);
- val = !skb_queue_empty(&scp->other_receive_queue);
- if (scp->state != DN_RUN)
- val = -ENOTCONN;
- release_sock(sk);
- return val;
-
- case TIOCOUTQ:
- amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
- if (amount < 0)
- amount = 0;
- err = put_user(amount, (int __user *)arg);
- break;
-
- case TIOCINQ:
- lock_sock(sk);
- skb = skb_peek(&scp->other_receive_queue);
- if (skb) {
- amount = skb->len;
- } else {
- skb_queue_walk(&sk->sk_receive_queue, skb)
- amount += skb->len;
- }
- release_sock(sk);
- err = put_user(amount, (int __user *)arg);
- break;
-
- default:
- err = -ENOIOCTLCMD;
- break;
- }
-
- return err;
-}
-
-static int dn_listen(struct socket *sock, int backlog)
-{
- struct sock *sk = sock->sk;
- int err = -EINVAL;
-
- lock_sock(sk);
-
- if (sock_flag(sk, SOCK_ZAPPED))
- goto out;
-
- if ((DN_SK(sk)->state != DN_O) || (sk->sk_state == TCP_LISTEN))
- goto out;
-
- sk->sk_max_ack_backlog = backlog;
- sk->sk_ack_backlog = 0;
- sk->sk_state = TCP_LISTEN;
- err = 0;
- dn_rehash_sock(sk);
-
-out:
- release_sock(sk);
-
- return err;
-}
-
-
-static int dn_shutdown(struct socket *sock, int how)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- int err = -ENOTCONN;
-
- lock_sock(sk);
-
- if (sock->state == SS_UNCONNECTED)
- goto out;
-
- err = 0;
- if (sock->state == SS_DISCONNECTING)
- goto out;
-
- err = -EINVAL;
- if (scp->state == DN_O)
- goto out;
-
- if (how != SHUT_RDWR)
- goto out;
-
- sk->sk_shutdown = SHUTDOWN_MASK;
- dn_destroy_sock(sk);
- err = 0;
-
-out:
- release_sock(sk);
-
- return err;
-}
-
-static int dn_setsockopt(struct socket *sock, int level, int optname,
- sockptr_t optval, unsigned int optlen)
-{
- struct sock *sk = sock->sk;
- int err;
-
- lock_sock(sk);
- err = __dn_setsockopt(sock, level, optname, optval, optlen, 0);
- release_sock(sk);
-#ifdef CONFIG_NETFILTER
- /* we need to exclude all possible ENOPROTOOPTs except default case */
- if (err == -ENOPROTOOPT && optname != DSO_LINKINFO &&
- optname != DSO_STREAM && optname != DSO_SEQPACKET)
- err = nf_setsockopt(sk, PF_DECnet, optname, optval, optlen);
-#endif
-
- return err;
-}
-
-static int __dn_setsockopt(struct socket *sock, int level, int optname,
- sockptr_t optval, unsigned int optlen, int flags)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- long timeo;
- union {
- struct optdata_dn opt;
- struct accessdata_dn acc;
- int mode;
- unsigned long win;
- int val;
- unsigned char services;
- unsigned char info;
- } u;
- int err;
-
- if (optlen && sockptr_is_null(optval))
- return -EINVAL;
-
- if (optlen > sizeof(u))
- return -EINVAL;
-
- if (copy_from_sockptr(&u, optval, optlen))
- return -EFAULT;
-
- switch (optname) {
- case DSO_CONDATA:
- if (sock->state == SS_CONNECTED)
- return -EISCONN;
- if ((scp->state != DN_O) && (scp->state != DN_CR))
- return -EINVAL;
-
- if (optlen != sizeof(struct optdata_dn))
- return -EINVAL;
-
- if (le16_to_cpu(u.opt.opt_optl) > 16)
- return -EINVAL;
-
- memcpy(&scp->conndata_out, &u.opt, optlen);
- break;
-
- case DSO_DISDATA:
- if (sock->state != SS_CONNECTED &&
- scp->accept_mode == ACC_IMMED)
- return -ENOTCONN;
-
- if (optlen != sizeof(struct optdata_dn))
- return -EINVAL;
-
- if (le16_to_cpu(u.opt.opt_optl) > 16)
- return -EINVAL;
-
- memcpy(&scp->discdata_out, &u.opt, optlen);
- break;
-
- case DSO_CONACCESS:
- if (sock->state == SS_CONNECTED)
- return -EISCONN;
- if (scp->state != DN_O)
- return -EINVAL;
-
- if (optlen != sizeof(struct accessdata_dn))
- return -EINVAL;
-
- if ((u.acc.acc_accl > DN_MAXACCL) ||
- (u.acc.acc_passl > DN_MAXACCL) ||
- (u.acc.acc_userl > DN_MAXACCL))
- return -EINVAL;
-
- memcpy(&scp->accessdata, &u.acc, optlen);
- break;
-
- case DSO_ACCEPTMODE:
- if (sock->state == SS_CONNECTED)
- return -EISCONN;
- if (scp->state != DN_O)
- return -EINVAL;
-
- if (optlen != sizeof(int))
- return -EINVAL;
-
- if ((u.mode != ACC_IMMED) && (u.mode != ACC_DEFER))
- return -EINVAL;
-
- scp->accept_mode = (unsigned char)u.mode;
- break;
-
- case DSO_CONACCEPT:
- if (scp->state != DN_CR)
- return -EINVAL;
- timeo = sock_rcvtimeo(sk, 0);
- err = dn_confirm_accept(sk, &timeo, sk->sk_allocation);
- return err;
-
- case DSO_CONREJECT:
- if (scp->state != DN_CR)
- return -EINVAL;
-
- scp->state = DN_DR;
- sk->sk_shutdown = SHUTDOWN_MASK;
- dn_nsp_send_disc(sk, 0x38, 0, sk->sk_allocation);
- break;
-
- case DSO_MAXWINDOW:
- if (optlen != sizeof(unsigned long))
- return -EINVAL;
- if (u.win > NSP_MAX_WINDOW)
- u.win = NSP_MAX_WINDOW;
- if (u.win == 0)
- return -EINVAL;
- scp->max_window = u.win;
- if (scp->snd_window > u.win)
- scp->snd_window = u.win;
- break;
-
- case DSO_NODELAY:
- if (optlen != sizeof(int))
- return -EINVAL;
- if (scp->nonagle == TCP_NAGLE_CORK)
- return -EINVAL;
- scp->nonagle = (u.val == 0) ? 0 : TCP_NAGLE_OFF;
- /* if (scp->nonagle == 1) { Push pending frames } */
- break;
-
- case DSO_CORK:
- if (optlen != sizeof(int))
- return -EINVAL;
- if (scp->nonagle == TCP_NAGLE_OFF)
- return -EINVAL;
- scp->nonagle = (u.val == 0) ? 0 : TCP_NAGLE_CORK;
- /* if (scp->nonagle == 0) { Push pending frames } */
- break;
-
- case DSO_SERVICES:
- if (optlen != sizeof(unsigned char))
- return -EINVAL;
- if ((u.services & ~NSP_FC_MASK) != 0x01)
- return -EINVAL;
- if ((u.services & NSP_FC_MASK) == NSP_FC_MASK)
- return -EINVAL;
- scp->services_loc = u.services;
- break;
-
- case DSO_INFO:
- if (optlen != sizeof(unsigned char))
- return -EINVAL;
- if (u.info & 0xfc)
- return -EINVAL;
- scp->info_loc = u.info;
- break;
-
- case DSO_LINKINFO:
- case DSO_STREAM:
- case DSO_SEQPACKET:
- default:
- return -ENOPROTOOPT;
- }
-
- return 0;
-}
-
-static int dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
-{
- struct sock *sk = sock->sk;
- int err;
-
- lock_sock(sk);
- err = __dn_getsockopt(sock, level, optname, optval, optlen, 0);
- release_sock(sk);
-#ifdef CONFIG_NETFILTER
- if (err == -ENOPROTOOPT && optname != DSO_STREAM &&
- optname != DSO_SEQPACKET && optname != DSO_CONACCEPT &&
- optname != DSO_CONREJECT) {
- int len;
-
- if (get_user(len, optlen))
- return -EFAULT;
-
- err = nf_getsockopt(sk, PF_DECnet, optname, optval, &len);
- if (err >= 0)
- err = put_user(len, optlen);
- }
-#endif
-
- return err;
-}
-
-static int __dn_getsockopt(struct socket *sock, int level,int optname, char __user *optval,int __user *optlen, int flags)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- struct linkinfo_dn link;
- unsigned int r_len;
- void *r_data = NULL;
- unsigned int val;
-
- if(get_user(r_len , optlen))
- return -EFAULT;
-
- switch (optname) {
- case DSO_CONDATA:
- if (r_len > sizeof(struct optdata_dn))
- r_len = sizeof(struct optdata_dn);
- r_data = &scp->conndata_in;
- break;
-
- case DSO_DISDATA:
- if (r_len > sizeof(struct optdata_dn))
- r_len = sizeof(struct optdata_dn);
- r_data = &scp->discdata_in;
- break;
-
- case DSO_CONACCESS:
- if (r_len > sizeof(struct accessdata_dn))
- r_len = sizeof(struct accessdata_dn);
- r_data = &scp->accessdata;
- break;
-
- case DSO_ACCEPTMODE:
- if (r_len > sizeof(unsigned char))
- r_len = sizeof(unsigned char);
- r_data = &scp->accept_mode;
- break;
-
- case DSO_LINKINFO:
- if (r_len > sizeof(struct linkinfo_dn))
- r_len = sizeof(struct linkinfo_dn);
-
- memset(&link, 0, sizeof(link));
-
- switch (sock->state) {
- case SS_CONNECTING:
- link.idn_linkstate = LL_CONNECTING;
- break;
- case SS_DISCONNECTING:
- link.idn_linkstate = LL_DISCONNECTING;
- break;
- case SS_CONNECTED:
- link.idn_linkstate = LL_RUNNING;
- break;
- default:
- link.idn_linkstate = LL_INACTIVE;
- }
-
- link.idn_segsize = scp->segsize_rem;
- r_data = &link;
- break;
-
- case DSO_MAXWINDOW:
- if (r_len > sizeof(unsigned long))
- r_len = sizeof(unsigned long);
- r_data = &scp->max_window;
- break;
-
- case DSO_NODELAY:
- if (r_len > sizeof(int))
- r_len = sizeof(int);
- val = (scp->nonagle == TCP_NAGLE_OFF);
- r_data = &val;
- break;
-
- case DSO_CORK:
- if (r_len > sizeof(int))
- r_len = sizeof(int);
- val = (scp->nonagle == TCP_NAGLE_CORK);
- r_data = &val;
- break;
-
- case DSO_SERVICES:
- if (r_len > sizeof(unsigned char))
- r_len = sizeof(unsigned char);
- r_data = &scp->services_rem;
- break;
-
- case DSO_INFO:
- if (r_len > sizeof(unsigned char))
- r_len = sizeof(unsigned char);
- r_data = &scp->info_rem;
- break;
-
- case DSO_STREAM:
- case DSO_SEQPACKET:
- case DSO_CONACCEPT:
- case DSO_CONREJECT:
- default:
- return -ENOPROTOOPT;
- }
-
- if (r_data) {
- if (copy_to_user(optval, r_data, r_len))
- return -EFAULT;
- if (put_user(r_len, optlen))
- return -EFAULT;
- }
-
- return 0;
-}
-
-
-static int dn_data_ready(struct sock *sk, struct sk_buff_head *q, int flags, int target)
-{
- struct sk_buff *skb;
- int len = 0;
-
- if (flags & MSG_OOB)
- return !skb_queue_empty(q) ? 1 : 0;
-
- skb_queue_walk(q, skb) {
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- len += skb->len;
-
- if (cb->nsp_flags & 0x40) {
- /* SOCK_SEQPACKET reads to EOM */
- if (sk->sk_type == SOCK_SEQPACKET)
- return 1;
- /* so does SOCK_STREAM unless WAITALL is specified */
- if (!(flags & MSG_WAITALL))
- return 1;
- }
-
- /* minimum data length for read exceeded */
- if (len >= target)
- return 1;
- }
-
- return 0;
-}
-
-
-static int dn_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
- int flags)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- struct sk_buff_head *queue = &sk->sk_receive_queue;
- size_t target = size > 1 ? 1 : 0;
- size_t copied = 0;
- int rv = 0;
- struct sk_buff *skb, *n;
- struct dn_skb_cb *cb = NULL;
- unsigned char eor = 0;
- long timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
-
- lock_sock(sk);
-
- if (sock_flag(sk, SOCK_ZAPPED)) {
- rv = -EADDRNOTAVAIL;
- goto out;
- }
-
- if (sk->sk_shutdown & RCV_SHUTDOWN) {
- rv = 0;
- goto out;
- }
-
- rv = dn_check_state(sk, NULL, 0, &timeo, flags);
- if (rv)
- goto out;
-
- if (flags & ~(MSG_CMSG_COMPAT|MSG_PEEK|MSG_OOB|MSG_WAITALL|MSG_DONTWAIT|MSG_NOSIGNAL)) {
- rv = -EOPNOTSUPP;
- goto out;
- }
-
- if (flags & MSG_OOB)
- queue = &scp->other_receive_queue;
-
- if (flags & MSG_WAITALL)
- target = size;
-
-
- /*
- * See if there is data ready to read, sleep if there isn't
- */
- for(;;) {
- DEFINE_WAIT_FUNC(wait, woken_wake_function);
-
- if (sk->sk_err)
- goto out;
-
- if (!skb_queue_empty(&scp->other_receive_queue)) {
- if (!(flags & MSG_OOB)) {
- msg->msg_flags |= MSG_OOB;
- if (!scp->other_report) {
- scp->other_report = 1;
- goto out;
- }
- }
- }
-
- if (scp->state != DN_RUN)
- goto out;
-
- if (signal_pending(current)) {
- rv = sock_intr_errno(timeo);
- goto out;
- }
-
- if (dn_data_ready(sk, queue, flags, target))
- break;
-
- if (flags & MSG_DONTWAIT) {
- rv = -EWOULDBLOCK;
- goto out;
- }
-
- add_wait_queue(sk_sleep(sk), &wait);
- sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
- sk_wait_event(sk, &timeo, dn_data_ready(sk, queue, flags, target), &wait);
- sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
- remove_wait_queue(sk_sleep(sk), &wait);
- }
-
- skb_queue_walk_safe(queue, skb, n) {
- unsigned int chunk = skb->len;
- cb = DN_SKB_CB(skb);
-
- if ((chunk + copied) > size)
- chunk = size - copied;
-
- if (memcpy_to_msg(msg, skb->data, chunk)) {
- rv = -EFAULT;
- break;
- }
- copied += chunk;
-
- if (!(flags & MSG_PEEK))
- skb_pull(skb, chunk);
-
- eor = cb->nsp_flags & 0x40;
-
- if (skb->len == 0) {
- skb_unlink(skb, queue);
- kfree_skb(skb);
- /*
- * N.B. Don't refer to skb or cb after this point
- * in loop.
- */
- if ((scp->flowloc_sw == DN_DONTSEND) && !dn_congested(sk)) {
- scp->flowloc_sw = DN_SEND;
- dn_nsp_send_link(sk, DN_SEND, 0);
- }
- }
-
- if (eor) {
- if (sk->sk_type == SOCK_SEQPACKET)
- break;
- if (!(flags & MSG_WAITALL))
- break;
- }
-
- if (flags & MSG_OOB)
- break;
-
- if (copied >= target)
- break;
- }
-
- rv = copied;
-
-
- if (eor && (sk->sk_type == SOCK_SEQPACKET))
- msg->msg_flags |= MSG_EOR;
-
-out:
- if (rv == 0)
- rv = (flags & MSG_PEEK) ? -sk->sk_err : sock_error(sk);
-
- if ((rv >= 0) && msg->msg_name) {
- __sockaddr_check_size(sizeof(struct sockaddr_dn));
- memcpy(msg->msg_name, &scp->peer, sizeof(struct sockaddr_dn));
- msg->msg_namelen = sizeof(struct sockaddr_dn);
- }
-
- release_sock(sk);
-
- return rv;
-}
-
-
-static inline int dn_queue_too_long(struct dn_scp *scp, struct sk_buff_head *queue, int flags)
-{
- unsigned char fctype = scp->services_rem & NSP_FC_MASK;
- if (skb_queue_len(queue) >= scp->snd_window)
- return 1;
- if (fctype != NSP_FC_NONE) {
- if (flags & MSG_OOB) {
- if (scp->flowrem_oth == 0)
- return 1;
- } else {
- if (scp->flowrem_dat == 0)
- return 1;
- }
- }
- return 0;
-}
-
-/*
- * The DECnet spec requires that the "routing layer" accepts packets which
- * are at least 230 bytes in size. This excludes any headers which the NSP
- * layer might add, so we always assume that we'll be using the maximal
- * length header on data packets. The variation in length is due to the
- * inclusion (or not) of the two 16 bit acknowledgement fields so it doesn't
- * make much practical difference.
- */
-unsigned int dn_mss_from_pmtu(struct net_device *dev, int mtu)
-{
- unsigned int mss = 230 - DN_MAX_NSP_DATA_HEADER;
- if (dev) {
- struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
- mtu -= LL_RESERVED_SPACE(dev);
- if (dn_db->use_long)
- mtu -= 21;
- else
- mtu -= 6;
- mtu -= DN_MAX_NSP_DATA_HEADER;
- } else {
- /*
- * 21 = long header, 16 = guess at MAC header length
- */
- mtu -= (21 + DN_MAX_NSP_DATA_HEADER + 16);
- }
- if (mtu > mss)
- mss = mtu;
- return mss;
-}
-
-static inline unsigned int dn_current_mss(struct sock *sk, int flags)
-{
- struct dst_entry *dst = __sk_dst_get(sk);
- struct dn_scp *scp = DN_SK(sk);
- int mss_now = min_t(int, scp->segsize_loc, scp->segsize_rem);
-
- /* Other data messages are limited to 16 bytes per packet */
- if (flags & MSG_OOB)
- return 16;
-
- /* This works out the maximum size of segment we can send out */
- if (dst) {
- u32 mtu = dst_mtu(dst);
- mss_now = min_t(int, dn_mss_from_pmtu(dst->dev, mtu), mss_now);
- }
-
- return mss_now;
-}
-
-/*
- * N.B. We get the timeout wrong here, but then we always did get it
- * wrong before and this is another step along the road to correcting
- * it. It ought to get updated each time we pass through the routine,
- * but in practise it probably doesn't matter too much for now.
- */
-static inline struct sk_buff *dn_alloc_send_pskb(struct sock *sk,
- unsigned long datalen, int noblock,
- int *errcode)
-{
- struct sk_buff *skb = sock_alloc_send_skb(sk, datalen,
- noblock, errcode);
- if (skb) {
- skb->protocol = htons(ETH_P_DNA_RT);
- skb->pkt_type = PACKET_OUTGOING;
- }
- return skb;
-}
-
-static int dn_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
-{
- struct sock *sk = sock->sk;
- struct dn_scp *scp = DN_SK(sk);
- size_t mss;
- struct sk_buff_head *queue = &scp->data_xmit_queue;
- int flags = msg->msg_flags;
- int err = 0;
- size_t sent = 0;
- int addr_len = msg->msg_namelen;
- DECLARE_SOCKADDR(struct sockaddr_dn *, addr, msg->msg_name);
- struct sk_buff *skb = NULL;
- struct dn_skb_cb *cb;
- size_t len;
- unsigned char fctype;
- long timeo;
-
- if (flags & ~(MSG_TRYHARD|MSG_OOB|MSG_DONTWAIT|MSG_EOR|MSG_NOSIGNAL|MSG_MORE|MSG_CMSG_COMPAT))
- return -EOPNOTSUPP;
-
- if (addr_len && (addr_len != sizeof(struct sockaddr_dn)))
- return -EINVAL;
-
- lock_sock(sk);
- timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT);
- /*
- * The only difference between stream sockets and sequenced packet
- * sockets is that the stream sockets always behave as if MSG_EOR
- * has been set.
- */
- if (sock->type == SOCK_STREAM) {
- if (flags & MSG_EOR) {
- err = -EINVAL;
- goto out;
- }
- flags |= MSG_EOR;
- }
-
-
- err = dn_check_state(sk, addr, addr_len, &timeo, flags);
- if (err)
- goto out_err;
-
- if (sk->sk_shutdown & SEND_SHUTDOWN) {
- err = -EPIPE;
- if (!(flags & MSG_NOSIGNAL))
- send_sig(SIGPIPE, current, 0);
- goto out_err;
- }
-
- if ((flags & MSG_TRYHARD) && sk->sk_dst_cache)
- dst_negative_advice(sk);
-
- mss = scp->segsize_rem;
- fctype = scp->services_rem & NSP_FC_MASK;
-
- mss = dn_current_mss(sk, flags);
-
- if (flags & MSG_OOB) {
- queue = &scp->other_xmit_queue;
- if (size > mss) {
- err = -EMSGSIZE;
- goto out;
- }
- }
-
- scp->persist_fxn = dn_nsp_xmit_timeout;
-
- while(sent < size) {
- err = sock_error(sk);
- if (err)
- goto out;
-
- if (signal_pending(current)) {
- err = sock_intr_errno(timeo);
- goto out;
- }
-
- /*
- * Calculate size that we wish to send.
- */
- len = size - sent;
-
- if (len > mss)
- len = mss;
-
- /*
- * Wait for queue size to go down below the window
- * size.
- */
- if (dn_queue_too_long(scp, queue, flags)) {
- DEFINE_WAIT_FUNC(wait, woken_wake_function);
-
- if (flags & MSG_DONTWAIT) {
- err = -EWOULDBLOCK;
- goto out;
- }
-
- add_wait_queue(sk_sleep(sk), &wait);
- sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
- sk_wait_event(sk, &timeo,
- !dn_queue_too_long(scp, queue, flags), &wait);
- sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
- remove_wait_queue(sk_sleep(sk), &wait);
- continue;
- }
-
- /*
- * Get a suitably sized skb.
- * 64 is a bit of a hack really, but its larger than any
- * link-layer headers and has served us well as a good
- * guess as to their real length.
- */
- skb = dn_alloc_send_pskb(sk, len + 64 + DN_MAX_NSP_DATA_HEADER,
- flags & MSG_DONTWAIT, &err);
-
- if (err)
- break;
-
- if (!skb)
- continue;
-
- cb = DN_SKB_CB(skb);
-
- skb_reserve(skb, 64 + DN_MAX_NSP_DATA_HEADER);
-
- if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
- err = -EFAULT;
- goto out;
- }
-
- if (flags & MSG_OOB) {
- cb->nsp_flags = 0x30;
- if (fctype != NSP_FC_NONE)
- scp->flowrem_oth--;
- } else {
- cb->nsp_flags = 0x00;
- if (scp->seg_total == 0)
- cb->nsp_flags |= 0x20;
-
- scp->seg_total += len;
-
- if (((sent + len) == size) && (flags & MSG_EOR)) {
- cb->nsp_flags |= 0x40;
- scp->seg_total = 0;
- if (fctype == NSP_FC_SCMC)
- scp->flowrem_dat--;
- }
- if (fctype == NSP_FC_SRC)
- scp->flowrem_dat--;
- }
-
- sent += len;
- dn_nsp_queue_xmit(sk, skb, sk->sk_allocation, flags & MSG_OOB);
- skb = NULL;
-
- scp->persist = dn_nsp_persist(sk);
-
- }
-out:
-
- kfree_skb(skb);
-
- release_sock(sk);
-
- return sent ? sent : err;
-
-out_err:
- err = sk_stream_error(sk, flags, err);
- release_sock(sk);
- return err;
-}
-
-static int dn_device_event(struct notifier_block *this, unsigned long event,
- void *ptr)
-{
- struct net_device *dev = netdev_notifier_info_to_dev(ptr);
-
- if (!net_eq(dev_net(dev), &init_net))
- return NOTIFY_DONE;
-
- switch (event) {
- case NETDEV_UP:
- dn_dev_up(dev);
- break;
- case NETDEV_DOWN:
- dn_dev_down(dev);
- break;
- default:
- break;
- }
-
- return NOTIFY_DONE;
-}
-
-static struct notifier_block dn_dev_notifier = {
- .notifier_call = dn_device_event,
-};
-
-static struct packet_type dn_dix_packet_type __read_mostly = {
- .type = cpu_to_be16(ETH_P_DNA_RT),
- .func = dn_route_rcv,
-};
-
-#ifdef CONFIG_PROC_FS
-struct dn_iter_state {
- int bucket;
-};
-
-static struct sock *dn_socket_get_first(struct seq_file *seq)
-{
- struct dn_iter_state *state = seq->private;
- struct sock *n = NULL;
-
- for(state->bucket = 0;
- state->bucket < DN_SK_HASH_SIZE;
- ++state->bucket) {
- n = sk_head(&dn_sk_hash[state->bucket]);
- if (n)
- break;
- }
-
- return n;
-}
-
-static struct sock *dn_socket_get_next(struct seq_file *seq,
- struct sock *n)
-{
- struct dn_iter_state *state = seq->private;
-
- n = sk_next(n);
- while (!n) {
- if (++state->bucket >= DN_SK_HASH_SIZE)
- break;
- n = sk_head(&dn_sk_hash[state->bucket]);
- }
- return n;
-}
-
-static struct sock *socket_get_idx(struct seq_file *seq, loff_t *pos)
-{
- struct sock *sk = dn_socket_get_first(seq);
-
- if (sk) {
- while(*pos && (sk = dn_socket_get_next(seq, sk)))
- --*pos;
- }
- return *pos ? NULL : sk;
-}
-
-static void *dn_socket_get_idx(struct seq_file *seq, loff_t pos)
-{
- void *rc;
- read_lock_bh(&dn_hash_lock);
- rc = socket_get_idx(seq, &pos);
- if (!rc) {
- read_unlock_bh(&dn_hash_lock);
- }
- return rc;
-}
-
-static void *dn_socket_seq_start(struct seq_file *seq, loff_t *pos)
-{
- return *pos ? dn_socket_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
-}
-
-static void *dn_socket_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- void *rc;
-
- if (v == SEQ_START_TOKEN) {
- rc = dn_socket_get_idx(seq, 0);
- goto out;
- }
-
- rc = dn_socket_get_next(seq, v);
- if (rc)
- goto out;
- read_unlock_bh(&dn_hash_lock);
-out:
- ++*pos;
- return rc;
-}
-
-static void dn_socket_seq_stop(struct seq_file *seq, void *v)
-{
- if (v && v != SEQ_START_TOKEN)
- read_unlock_bh(&dn_hash_lock);
-}
-
-#define IS_NOT_PRINTABLE(x) ((x) < 32 || (x) > 126)
-
-static void dn_printable_object(struct sockaddr_dn *dn, unsigned char *buf)
-{
- int i;
-
- switch (le16_to_cpu(dn->sdn_objnamel)) {
- case 0:
- sprintf(buf, "%d", dn->sdn_objnum);
- break;
- default:
- for (i = 0; i < le16_to_cpu(dn->sdn_objnamel); i++) {
- buf[i] = dn->sdn_objname[i];
- if (IS_NOT_PRINTABLE(buf[i]))
- buf[i] = '.';
- }
- buf[i] = 0;
- }
-}
-
-static char *dn_state2asc(unsigned char state)
-{
- switch (state) {
- case DN_O:
- return "OPEN";
- case DN_CR:
- return " CR";
- case DN_DR:
- return " DR";
- case DN_DRC:
- return " DRC";
- case DN_CC:
- return " CC";
- case DN_CI:
- return " CI";
- case DN_NR:
- return " NR";
- case DN_NC:
- return " NC";
- case DN_CD:
- return " CD";
- case DN_RJ:
- return " RJ";
- case DN_RUN:
- return " RUN";
- case DN_DI:
- return " DI";
- case DN_DIC:
- return " DIC";
- case DN_DN:
- return " DN";
- case DN_CL:
- return " CL";
- case DN_CN:
- return " CN";
- }
-
- return "????";
-}
-
-static inline void dn_socket_format_entry(struct seq_file *seq, struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
- char buf1[DN_ASCBUF_LEN];
- char buf2[DN_ASCBUF_LEN];
- char local_object[DN_MAXOBJL+3];
- char remote_object[DN_MAXOBJL+3];
-
- dn_printable_object(&scp->addr, local_object);
- dn_printable_object(&scp->peer, remote_object);
-
- seq_printf(seq,
- "%6s/%04X %04d:%04d %04d:%04d %01d %-16s "
- "%6s/%04X %04d:%04d %04d:%04d %01d %-16s %4s %s\n",
- dn_addr2asc(le16_to_cpu(dn_saddr2dn(&scp->addr)), buf1),
- scp->addrloc,
- scp->numdat,
- scp->numoth,
- scp->ackxmt_dat,
- scp->ackxmt_oth,
- scp->flowloc_sw,
- local_object,
- dn_addr2asc(le16_to_cpu(dn_saddr2dn(&scp->peer)), buf2),
- scp->addrrem,
- scp->numdat_rcv,
- scp->numoth_rcv,
- scp->ackrcv_dat,
- scp->ackrcv_oth,
- scp->flowrem_sw,
- remote_object,
- dn_state2asc(scp->state),
- ((scp->accept_mode == ACC_IMMED) ? "IMMED" : "DEFER"));
-}
-
-static int dn_socket_seq_show(struct seq_file *seq, void *v)
-{
- if (v == SEQ_START_TOKEN) {
- seq_puts(seq, "Local Remote\n");
- } else {
- dn_socket_format_entry(seq, v);
- }
- return 0;
-}
-
-static const struct seq_operations dn_socket_seq_ops = {
- .start = dn_socket_seq_start,
- .next = dn_socket_seq_next,
- .stop = dn_socket_seq_stop,
- .show = dn_socket_seq_show,
-};
-#endif
-
-static const struct net_proto_family dn_family_ops = {
- .family = AF_DECnet,
- .create = dn_create,
- .owner = THIS_MODULE,
-};
-
-static const struct proto_ops dn_proto_ops = {
- .family = AF_DECnet,
- .owner = THIS_MODULE,
- .release = dn_release,
- .bind = dn_bind,
- .connect = dn_connect,
- .socketpair = sock_no_socketpair,
- .accept = dn_accept,
- .getname = dn_getname,
- .poll = dn_poll,
- .ioctl = dn_ioctl,
- .listen = dn_listen,
- .shutdown = dn_shutdown,
- .setsockopt = dn_setsockopt,
- .getsockopt = dn_getsockopt,
- .sendmsg = dn_sendmsg,
- .recvmsg = dn_recvmsg,
- .mmap = sock_no_mmap,
- .sendpage = sock_no_sendpage,
-};
-
-MODULE_DESCRIPTION("The Linux DECnet Network Protocol");
-MODULE_AUTHOR("Linux DECnet Project Team");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_NETPROTO(PF_DECnet);
-
-static const char banner[] __initconst = KERN_INFO
-"NET4: DECnet for Linux: V.2.5.68s (C) 1995-2003 Linux DECnet Project Team\n";
-
-static int __init decnet_init(void)
-{
- int rc;
-
- printk(banner);
-
- rc = proto_register(&dn_proto, 1);
- if (rc != 0)
- goto out;
-
- dn_neigh_init();
- dn_dev_init();
- dn_route_init();
- dn_fib_init();
-
- sock_register(&dn_family_ops);
- dev_add_pack(&dn_dix_packet_type);
- register_netdevice_notifier(&dn_dev_notifier);
-
- proc_create_seq_private("decnet", 0444, init_net.proc_net,
- &dn_socket_seq_ops, sizeof(struct dn_iter_state),
- NULL);
- dn_register_sysctl();
-out:
- return rc;
-
-}
-module_init(decnet_init);
-
-/*
- * Prevent DECnet module unloading until its fixed properly.
- * Requires an audit of the code to check for memory leaks and
- * initialisation problems etc.
- */
-#if 0
-static void __exit decnet_exit(void)
-{
- sock_unregister(AF_DECnet);
- rtnl_unregister_all(PF_DECnet);
- dev_remove_pack(&dn_dix_packet_type);
-
- dn_unregister_sysctl();
-
- unregister_netdevice_notifier(&dn_dev_notifier);
-
- dn_route_cleanup();
- dn_dev_cleanup();
- dn_neigh_cleanup();
- dn_fib_cleanup();
-
- remove_proc_entry("decnet", init_net.proc_net);
-
- proto_unregister(&dn_proto);
-
- rcu_barrier(); /* Wait for completion of call_rcu()'s */
-}
-module_exit(decnet_exit);
-#endif
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * DECnet An implementation of the DECnet protocol suite for the LINUX
- * operating system. DECnet is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * DECnet Device Layer
- *
- * Authors: Steve Whitehouse <SteveW@ACM.org>
- * Eduardo Marcelo Serrat <emserrat@geocities.com>
- *
- * Changes:
- * Steve Whitehouse : Devices now see incoming frames so they
- * can mark on who it came from.
- * Steve Whitehouse : Fixed bug in creating neighbours. Each neighbour
- * can now have a device specific setup func.
- * Steve Whitehouse : Added /proc/sys/net/decnet/conf/<dev>/
- * Steve Whitehouse : Fixed bug which sometimes killed timer
- * Steve Whitehouse : Multiple ifaddr support
- * Steve Whitehouse : SIOCGIFCONF is now a compile time option
- * Steve Whitehouse : /proc/sys/net/decnet/conf/<sys>/forwarding
- * Steve Whitehouse : Removed timer1 - it's a user space issue now
- * Patrick Caulfield : Fixed router hello message format
- * Steve Whitehouse : Got rid of constant sizes for blksize for
- * devices. All mtu based now.
- */
-
-#include <linux/capability.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/init.h>
-#include <linux/net.h>
-#include <linux/netdevice.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/if_addr.h>
-#include <linux/if_arp.h>
-#include <linux/if_ether.h>
-#include <linux/skbuff.h>
-#include <linux/sysctl.h>
-#include <linux/notifier.h>
-#include <linux/slab.h>
-#include <linux/jiffies.h>
-#include <linux/uaccess.h>
-#include <net/net_namespace.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/flow.h>
-#include <net/fib_rules.h>
-#include <net/netlink.h>
-#include <net/dn.h>
-#include <net/dn_dev.h>
-#include <net/dn_route.h>
-#include <net/dn_neigh.h>
-#include <net/dn_fib.h>
-
-#define DN_IFREQ_SIZE (offsetof(struct ifreq, ifr_ifru) + sizeof(struct sockaddr_dn))
-
-static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
-static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00};
-static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00};
-static unsigned char dn_eco_version[3] = {0x02,0x00,0x00};
-
-extern struct neigh_table dn_neigh_table;
-
-/*
- * decnet_address is kept in network order.
- */
-__le16 decnet_address = 0;
-
-static DEFINE_SPINLOCK(dndev_lock);
-static struct net_device *decnet_default_device;
-static BLOCKING_NOTIFIER_HEAD(dnaddr_chain);
-
-static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
-static void dn_dev_delete(struct net_device *dev);
-static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa);
-
-static int dn_eth_up(struct net_device *);
-static void dn_eth_down(struct net_device *);
-static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
-static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);
-
-static struct dn_dev_parms dn_dev_list[] = {
-{
- .type = ARPHRD_ETHER, /* Ethernet */
- .mode = DN_DEV_BCAST,
- .state = DN_DEV_S_RU,
- .t2 = 1,
- .t3 = 10,
- .name = "ethernet",
- .up = dn_eth_up,
- .down = dn_eth_down,
- .timer3 = dn_send_brd_hello,
-},
-{
- .type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */
- .mode = DN_DEV_BCAST,
- .state = DN_DEV_S_RU,
- .t2 = 1,
- .t3 = 10,
- .name = "ipgre",
- .timer3 = dn_send_brd_hello,
-},
-#if 0
-{
- .type = ARPHRD_X25, /* Bog standard X.25 */
- .mode = DN_DEV_UCAST,
- .state = DN_DEV_S_DS,
- .t2 = 1,
- .t3 = 120,
- .name = "x25",
- .timer3 = dn_send_ptp_hello,
-},
-#endif
-#if 0
-{
- .type = ARPHRD_PPP, /* DECnet over PPP */
- .mode = DN_DEV_BCAST,
- .state = DN_DEV_S_RU,
- .t2 = 1,
- .t3 = 10,
- .name = "ppp",
- .timer3 = dn_send_brd_hello,
-},
-#endif
-{
- .type = ARPHRD_DDCMP, /* DECnet over DDCMP */
- .mode = DN_DEV_UCAST,
- .state = DN_DEV_S_DS,
- .t2 = 1,
- .t3 = 120,
- .name = "ddcmp",
- .timer3 = dn_send_ptp_hello,
-},
-{
- .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */
- .mode = DN_DEV_BCAST,
- .state = DN_DEV_S_RU,
- .t2 = 1,
- .t3 = 10,
- .name = "loopback",
- .timer3 = dn_send_brd_hello,
-}
-};
-
-#define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list)
-
-#define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x)
-
-#ifdef CONFIG_SYSCTL
-
-static int min_t2[] = { 1 };
-static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
-static int min_t3[] = { 1 };
-static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */
-
-static int min_priority[1];
-static int max_priority[] = { 127 }; /* From DECnet spec */
-
-static int dn_forwarding_proc(struct ctl_table *, int, void *, size_t *,
- loff_t *);
-static struct dn_dev_sysctl_table {
- struct ctl_table_header *sysctl_header;
- struct ctl_table dn_dev_vars[5];
-} dn_dev_sysctl = {
- NULL,
- {
- {
- .procname = "forwarding",
- .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = dn_forwarding_proc,
- },
- {
- .procname = "priority",
- .data = (void *)DN_DEV_PARMS_OFFSET(priority),
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_priority,
- .extra2 = &max_priority
- },
- {
- .procname = "t2",
- .data = (void *)DN_DEV_PARMS_OFFSET(t2),
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_t2,
- .extra2 = &max_t2
- },
- {
- .procname = "t3",
- .data = (void *)DN_DEV_PARMS_OFFSET(t3),
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_t3,
- .extra2 = &max_t3
- },
- { }
- },
-};
-
-static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
-{
- struct dn_dev_sysctl_table *t;
- int i;
-
- char path[sizeof("net/decnet/conf/") + IFNAMSIZ];
-
- t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
- if (t == NULL)
- return;
-
- for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
- long offset = (long)t->dn_dev_vars[i].data;
- t->dn_dev_vars[i].data = ((char *)parms) + offset;
- }
-
- snprintf(path, sizeof(path), "net/decnet/conf/%s",
- dev? dev->name : parms->name);
-
- t->dn_dev_vars[0].extra1 = (void *)dev;
-
- t->sysctl_header = register_net_sysctl(&init_net, path, t->dn_dev_vars);
- if (t->sysctl_header == NULL)
- kfree(t);
- else
- parms->sysctl = t;
-}
-
-static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
-{
- if (parms->sysctl) {
- struct dn_dev_sysctl_table *t = parms->sysctl;
- parms->sysctl = NULL;
- unregister_net_sysctl_table(t->sysctl_header);
- kfree(t);
- }
-}
-
-static int dn_forwarding_proc(struct ctl_table *table, int write,
- void *buffer, size_t *lenp, loff_t *ppos)
-{
-#ifdef CONFIG_DECNET_ROUTER
- struct net_device *dev = table->extra1;
- struct dn_dev *dn_db;
- int err;
- int tmp, old;
-
- if (table->extra1 == NULL)
- return -EINVAL;
-
- dn_db = rcu_dereference_raw(dev->dn_ptr);
- old = dn_db->parms.forwarding;
-
- err = proc_dointvec(table, write, buffer, lenp, ppos);
-
- if ((err >= 0) && write) {
- if (dn_db->parms.forwarding < 0)
- dn_db->parms.forwarding = 0;
- if (dn_db->parms.forwarding > 2)
- dn_db->parms.forwarding = 2;
- /*
- * What an ugly hack this is... its works, just. It
- * would be nice if sysctl/proc were just that little
- * bit more flexible so I don't have to write a special
- * routine, or suffer hacks like this - SJW
- */
- tmp = dn_db->parms.forwarding;
- dn_db->parms.forwarding = old;
- if (dn_db->parms.down)
- dn_db->parms.down(dev);
- dn_db->parms.forwarding = tmp;
- if (dn_db->parms.up)
- dn_db->parms.up(dev);
- }
-
- return err;
-#else
- return -EINVAL;
-#endif
-}
-
-#else /* CONFIG_SYSCTL */
-static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
-{
-}
-static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
-{
-}
-
-#endif /* CONFIG_SYSCTL */
-
-static inline __u16 mtu2blksize(struct net_device *dev)
-{
- u32 blksize = dev->mtu;
- if (blksize > 0xffff)
- blksize = 0xffff;
-
- if (dev->type == ARPHRD_ETHER ||
- dev->type == ARPHRD_PPP ||
- dev->type == ARPHRD_IPGRE ||
- dev->type == ARPHRD_LOOPBACK)
- blksize -= 2;
-
- return (__u16)blksize;
-}
-
-static struct dn_ifaddr *dn_dev_alloc_ifa(void)
-{
- struct dn_ifaddr *ifa;
-
- ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
-
- return ifa;
-}
-
-static void dn_dev_free_ifa(struct dn_ifaddr *ifa)
-{
- kfree_rcu(ifa, rcu);
-}
-
-static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr __rcu **ifap, int destroy)
-{
- struct dn_ifaddr *ifa1 = rtnl_dereference(*ifap);
- unsigned char mac_addr[6];
- struct net_device *dev = dn_db->dev;
-
- ASSERT_RTNL();
-
- *ifap = ifa1->ifa_next;
-
- if (dn_db->dev->type == ARPHRD_ETHER) {
- if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
- dn_dn2eth(mac_addr, ifa1->ifa_local);
- dev_mc_del(dev, mac_addr);
- }
- }
-
- dn_ifaddr_notify(RTM_DELADDR, ifa1);
- blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
- if (destroy) {
- dn_dev_free_ifa(ifa1);
-
- if (dn_db->ifa_list == NULL)
- dn_dev_delete(dn_db->dev);
- }
-}
-
-static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
-{
- struct net_device *dev = dn_db->dev;
- struct dn_ifaddr *ifa1;
- unsigned char mac_addr[6];
-
- ASSERT_RTNL();
-
- /* Check for duplicates */
- for (ifa1 = rtnl_dereference(dn_db->ifa_list);
- ifa1 != NULL;
- ifa1 = rtnl_dereference(ifa1->ifa_next)) {
- if (ifa1->ifa_local == ifa->ifa_local)
- return -EEXIST;
- }
-
- if (dev->type == ARPHRD_ETHER) {
- if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
- dn_dn2eth(mac_addr, ifa->ifa_local);
- dev_mc_add(dev, mac_addr);
- }
- }
-
- ifa->ifa_next = dn_db->ifa_list;
- rcu_assign_pointer(dn_db->ifa_list, ifa);
-
- dn_ifaddr_notify(RTM_NEWADDR, ifa);
- blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
-
- return 0;
-}
-
-static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
-{
- struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
- int rv;
-
- if (dn_db == NULL) {
- int err;
- dn_db = dn_dev_create(dev, &err);
- if (dn_db == NULL)
- return err;
- }
-
- ifa->ifa_dev = dn_db;
-
- if (dev->flags & IFF_LOOPBACK)
- ifa->ifa_scope = RT_SCOPE_HOST;
-
- rv = dn_dev_insert_ifa(dn_db, ifa);
- if (rv)
- dn_dev_free_ifa(ifa);
- return rv;
-}
-
-
-int dn_dev_ioctl(unsigned int cmd, void __user *arg)
-{
- char buffer[DN_IFREQ_SIZE];
- struct ifreq *ifr = (struct ifreq *)buffer;
- struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
- struct dn_dev *dn_db;
- struct net_device *dev;
- struct dn_ifaddr *ifa = NULL;
- struct dn_ifaddr __rcu **ifap = NULL;
- int ret = 0;
-
- if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
- return -EFAULT;
- ifr->ifr_name[IFNAMSIZ-1] = 0;
-
- dev_load(&init_net, ifr->ifr_name);
-
- switch (cmd) {
- case SIOCGIFADDR:
- break;
- case SIOCSIFADDR:
- if (!capable(CAP_NET_ADMIN))
- return -EACCES;
- if (sdn->sdn_family != AF_DECnet)
- return -EINVAL;
- break;
- default:
- return -EINVAL;
- }
-
- rtnl_lock();
-
- if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
- ret = -ENODEV;
- goto done;
- }
-
- if ((dn_db = rtnl_dereference(dev->dn_ptr)) != NULL) {
- for (ifap = &dn_db->ifa_list;
- (ifa = rtnl_dereference(*ifap)) != NULL;
- ifap = &ifa->ifa_next)
- if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
- break;
- }
-
- if (ifa == NULL && cmd != SIOCSIFADDR) {
- ret = -EADDRNOTAVAIL;
- goto done;
- }
-
- switch (cmd) {
- case SIOCGIFADDR:
- *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
- if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
- ret = -EFAULT;
- break;
-
- case SIOCSIFADDR:
- if (!ifa) {
- if ((ifa = dn_dev_alloc_ifa()) == NULL) {
- ret = -ENOBUFS;
- break;
- }
- memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
- } else {
- if (ifa->ifa_local == dn_saddr2dn(sdn))
- break;
- dn_dev_del_ifa(dn_db, ifap, 0);
- }
-
- ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
-
- ret = dn_dev_set_ifa(dev, ifa);
- }
-done:
- rtnl_unlock();
-
- return ret;
-}
-
-struct net_device *dn_dev_get_default(void)
-{
- struct net_device *dev;
-
- spin_lock(&dndev_lock);
- dev = decnet_default_device;
- if (dev) {
- if (dev->dn_ptr)
- dev_hold(dev);
- else
- dev = NULL;
- }
- spin_unlock(&dndev_lock);
-
- return dev;
-}
-
-int dn_dev_set_default(struct net_device *dev, int force)
-{
- struct net_device *old = NULL;
- int rv = -EBUSY;
- if (!dev->dn_ptr)
- return -ENODEV;
-
- spin_lock(&dndev_lock);
- if (force || decnet_default_device == NULL) {
- old = decnet_default_device;
- decnet_default_device = dev;
- rv = 0;
- }
- spin_unlock(&dndev_lock);
-
- dev_put(old);
- return rv;
-}
-
-static void dn_dev_check_default(struct net_device *dev)
-{
- spin_lock(&dndev_lock);
- if (dev == decnet_default_device) {
- decnet_default_device = NULL;
- } else {
- dev = NULL;
- }
- spin_unlock(&dndev_lock);
-
- dev_put(dev);
-}
-
-/*
- * Called with RTNL
- */
-static struct dn_dev *dn_dev_by_index(int ifindex)
-{
- struct net_device *dev;
- struct dn_dev *dn_dev = NULL;
-
- dev = __dev_get_by_index(&init_net, ifindex);
- if (dev)
- dn_dev = rtnl_dereference(dev->dn_ptr);
-
- return dn_dev;
-}
-
-static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
- [IFA_ADDRESS] = { .type = NLA_U16 },
- [IFA_LOCAL] = { .type = NLA_U16 },
- [IFA_LABEL] = { .type = NLA_STRING,
- .len = IFNAMSIZ - 1 },
- [IFA_FLAGS] = { .type = NLA_U32 },
-};
-
-static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct netlink_ext_ack *extack)
-{
- struct net *net = sock_net(skb->sk);
- struct nlattr *tb[IFA_MAX+1];
- struct dn_dev *dn_db;
- struct ifaddrmsg *ifm;
- struct dn_ifaddr *ifa;
- struct dn_ifaddr __rcu **ifap;
- int err = -EINVAL;
-
- if (!netlink_capable(skb, CAP_NET_ADMIN))
- return -EPERM;
-
- if (!net_eq(net, &init_net))
- goto errout;
-
- err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX,
- dn_ifa_policy, extack);
- if (err < 0)
- goto errout;
-
- err = -ENODEV;
- ifm = nlmsg_data(nlh);
- if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
- goto errout;
-
- err = -EADDRNOTAVAIL;
- for (ifap = &dn_db->ifa_list;
- (ifa = rtnl_dereference(*ifap)) != NULL;
- ifap = &ifa->ifa_next) {
- if (tb[IFA_LOCAL] &&
- nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
- continue;
-
- if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
- continue;
-
- dn_dev_del_ifa(dn_db, ifap, 1);
- return 0;
- }
-
-errout:
- return err;
-}
-
-static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct netlink_ext_ack *extack)
-{
- struct net *net = sock_net(skb->sk);
- struct nlattr *tb[IFA_MAX+1];
- struct net_device *dev;
- struct dn_dev *dn_db;
- struct ifaddrmsg *ifm;
- struct dn_ifaddr *ifa;
- int err;
-
- if (!netlink_capable(skb, CAP_NET_ADMIN))
- return -EPERM;
-
- if (!net_eq(net, &init_net))
- return -EINVAL;
-
- err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX,
- dn_ifa_policy, extack);
- if (err < 0)
- return err;
-
- if (tb[IFA_LOCAL] == NULL)
- return -EINVAL;
-
- ifm = nlmsg_data(nlh);
- if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL)
- return -ENODEV;
-
- if ((dn_db = rtnl_dereference(dev->dn_ptr)) == NULL) {
- dn_db = dn_dev_create(dev, &err);
- if (!dn_db)
- return err;
- }
-
- if ((ifa = dn_dev_alloc_ifa()) == NULL)
- return -ENOBUFS;
-
- if (tb[IFA_ADDRESS] == NULL)
- tb[IFA_ADDRESS] = tb[IFA_LOCAL];
-
- ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
- ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
- ifa->ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) :
- ifm->ifa_flags;
- ifa->ifa_scope = ifm->ifa_scope;
- ifa->ifa_dev = dn_db;
-
- if (tb[IFA_LABEL])
- nla_strscpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
- else
- memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
-
- err = dn_dev_insert_ifa(dn_db, ifa);
- if (err)
- dn_dev_free_ifa(ifa);
-
- return err;
-}
-
-static inline size_t dn_ifaddr_nlmsg_size(void)
-{
- return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
- + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
- + nla_total_size(2) /* IFA_ADDRESS */
- + nla_total_size(2) /* IFA_LOCAL */
- + nla_total_size(4); /* IFA_FLAGS */
-}
-
-static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
- u32 portid, u32 seq, int event, unsigned int flags)
-{
- struct ifaddrmsg *ifm;
- struct nlmsghdr *nlh;
- u32 ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
-
- nlh = nlmsg_put(skb, portid, seq, event, sizeof(*ifm), flags);
- if (nlh == NULL)
- return -EMSGSIZE;
-
- ifm = nlmsg_data(nlh);
- ifm->ifa_family = AF_DECnet;
- ifm->ifa_prefixlen = 16;
- ifm->ifa_flags = ifa_flags;
- ifm->ifa_scope = ifa->ifa_scope;
- ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
-
- if ((ifa->ifa_address &&
- nla_put_le16(skb, IFA_ADDRESS, ifa->ifa_address)) ||
- (ifa->ifa_local &&
- nla_put_le16(skb, IFA_LOCAL, ifa->ifa_local)) ||
- (ifa->ifa_label[0] &&
- nla_put_string(skb, IFA_LABEL, ifa->ifa_label)) ||
- nla_put_u32(skb, IFA_FLAGS, ifa_flags))
- goto nla_put_failure;
- nlmsg_end(skb, nlh);
- return 0;
-
-nla_put_failure:
- nlmsg_cancel(skb, nlh);
- return -EMSGSIZE;
-}
-
-static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
-{
- struct sk_buff *skb;
- int err = -ENOBUFS;
-
- skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
- if (skb == NULL)
- goto errout;
-
- err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
- if (err < 0) {
- /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */
- WARN_ON(err == -EMSGSIZE);
- kfree_skb(skb);
- goto errout;
- }
- rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
- return;
-errout:
- if (err < 0)
- rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err);
-}
-
-static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
-{
- struct net *net = sock_net(skb->sk);
- int idx, dn_idx = 0, skip_ndevs, skip_naddr;
- struct net_device *dev;
- struct dn_dev *dn_db;
- struct dn_ifaddr *ifa;
-
- if (!net_eq(net, &init_net))
- return 0;
-
- skip_ndevs = cb->args[0];
- skip_naddr = cb->args[1];
-
- idx = 0;
- rcu_read_lock();
- for_each_netdev_rcu(&init_net, dev) {
- if (idx < skip_ndevs)
- goto cont;
- else if (idx > skip_ndevs) {
- /* Only skip over addresses for first dev dumped
- * in this iteration (idx == skip_ndevs) */
- skip_naddr = 0;
- }
-
- if ((dn_db = rcu_dereference(dev->dn_ptr)) == NULL)
- goto cont;
-
- for (ifa = rcu_dereference(dn_db->ifa_list), dn_idx = 0; ifa;
- ifa = rcu_dereference(ifa->ifa_next), dn_idx++) {
- if (dn_idx < skip_naddr)
- continue;
-
- if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).portid,
- cb->nlh->nlmsg_seq, RTM_NEWADDR,
- NLM_F_MULTI) < 0)
- goto done;
- }
-cont:
- idx++;
- }
-done:
- rcu_read_unlock();
- cb->args[0] = idx;
- cb->args[1] = dn_idx;
-
- return skb->len;
-}
-
-static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
-{
- struct dn_dev *dn_db;
- struct dn_ifaddr *ifa;
- int rv = -ENODEV;
-
- rcu_read_lock();
- dn_db = rcu_dereference(dev->dn_ptr);
- if (dn_db == NULL)
- goto out;
-
- ifa = rcu_dereference(dn_db->ifa_list);
- if (ifa != NULL) {
- *addr = ifa->ifa_local;
- rv = 0;
- }
-out:
- rcu_read_unlock();
- return rv;
-}
-
-/*
- * Find a default address to bind to.
- *
- * This is one of those areas where the initial VMS concepts don't really
- * map onto the Linux concepts, and since we introduced multiple addresses
- * per interface we have to cope with slightly odd ways of finding out what
- * "our address" really is. Mostly it's not a problem; for this we just guess
- * a sensible default. Eventually the routing code will take care of all the
- * nasties for us I hope.
- */
-int dn_dev_bind_default(__le16 *addr)
-{
- struct net_device *dev;
- int rv;
- dev = dn_dev_get_default();
-last_chance:
- if (dev) {
- rv = dn_dev_get_first(dev, addr);
- dev_put(dev);
- if (rv == 0 || dev == init_net.loopback_dev)
- return rv;
- }
- dev = init_net.loopback_dev;
- dev_hold(dev);
- goto last_chance;
-}
-
-static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
-{
- struct endnode_hello_message *msg;
- struct sk_buff *skb = NULL;
- __le16 *pktlen;
- struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
-
- if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
- return;
-
- skb->dev = dev;
-
- msg = skb_put(skb, sizeof(*msg));
-
- msg->msgflg = 0x0D;
- memcpy(msg->tiver, dn_eco_version, 3);
- dn_dn2eth(msg->id, ifa->ifa_local);
- msg->iinfo = DN_RT_INFO_ENDN;
- msg->blksize = cpu_to_le16(mtu2blksize(dev));
- msg->area = 0x00;
- memset(msg->seed, 0, 8);
- memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
-
- if (dn_db->router) {
- struct dn_neigh *dn = container_of(dn_db->router, struct dn_neigh, n);
- dn_dn2eth(msg->neighbor, dn->addr);
- }
-
- msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3);
- msg->mpd = 0x00;
- msg->datalen = 0x02;
- memset(msg->data, 0xAA, 2);
-
- pktlen = skb_push(skb, 2);
- *pktlen = cpu_to_le16(skb->len - 2);
-
- skb_reset_network_header(skb);
-
- dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
-}
-
-
-#define DRDELAY (5 * HZ)
-
-static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
-{
- /* First check time since device went up */
- if (time_before(jiffies, dn_db->uptime + DRDELAY))
- return 0;
-
- /* If there is no router, then yes... */
- if (!dn_db->router)
- return 1;
-
- /* otherwise only if we have a higher priority or.. */
- if (dn->priority < dn_db->parms.priority)
- return 1;
-
- /* if we have equal priority and a higher node number */
- if (dn->priority != dn_db->parms.priority)
- return 0;
-
- if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local))
- return 1;
-
- return 0;
-}
-
-static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
-{
- int n;
- struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
- struct dn_neigh *dn = container_of(dn_db->router, struct dn_neigh, n);
- struct sk_buff *skb;
- size_t size;
- unsigned char *ptr;
- unsigned char *i1, *i2;
- __le16 *pktlen;
- char *src;
-
- if (mtu2blksize(dev) < (26 + 7))
- return;
-
- n = mtu2blksize(dev) - 26;
- n /= 7;
-
- if (n > 32)
- n = 32;
-
- size = 2 + 26 + 7 * n;
-
- if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
- return;
-
- skb->dev = dev;
- ptr = skb_put(skb, size);
-
- *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
- *ptr++ = 2; /* ECO */
- *ptr++ = 0;
- *ptr++ = 0;
- dn_dn2eth(ptr, ifa->ifa_local);
- src = ptr;
- ptr += ETH_ALEN;
- *ptr++ = dn_db->parms.forwarding == 1 ?
- DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
- *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev));
- ptr += 2;
- *ptr++ = dn_db->parms.priority; /* Priority */
- *ptr++ = 0; /* Area: Reserved */
- *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3);
- ptr += 2;
- *ptr++ = 0; /* MPD: Reserved */
- i1 = ptr++;
- memset(ptr, 0, 7); /* Name: Reserved */
- ptr += 7;
- i2 = ptr++;
-
- n = dn_neigh_elist(dev, ptr, n);
-
- *i2 = 7 * n;
- *i1 = 8 + *i2;
-
- skb_trim(skb, (27 + *i2));
-
- pktlen = skb_push(skb, 2);
- *pktlen = cpu_to_le16(skb->len - 2);
-
- skb_reset_network_header(skb);
-
- if (dn_am_i_a_router(dn, dn_db, ifa)) {
- struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
- if (skb2) {
- dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
- }
- }
-
- dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
-}
-
-static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
-{
- struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
-
- if (dn_db->parms.forwarding == 0)
- dn_send_endnode_hello(dev, ifa);
- else
- dn_send_router_hello(dev, ifa);
-}
-
-static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
-{
- int tdlen = 16;
- int size = dev->hard_header_len + 2 + 4 + tdlen;
- struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
- int i;
- unsigned char *ptr;
- char src[ETH_ALEN];
-
- if (skb == NULL)
- return ;
-
- skb->dev = dev;
- skb_push(skb, dev->hard_header_len);
- ptr = skb_put(skb, 2 + 4 + tdlen);
-
- *ptr++ = DN_RT_PKT_HELO;
- *((__le16 *)ptr) = ifa->ifa_local;
- ptr += 2;
- *ptr++ = tdlen;
-
- for(i = 0; i < tdlen; i++)
- *ptr++ = 0252;
-
- dn_dn2eth(src, ifa->ifa_local);
- dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
-}
-
-static int dn_eth_up(struct net_device *dev)
-{
- struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
-
- if (dn_db->parms.forwarding == 0)
- dev_mc_add(dev, dn_rt_all_end_mcast);
- else
- dev_mc_add(dev, dn_rt_all_rt_mcast);
-
- dn_db->use_long = 1;
-
- return 0;
-}
-
-static void dn_eth_down(struct net_device *dev)
-{
- struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
-
- if (dn_db->parms.forwarding == 0)
- dev_mc_del(dev, dn_rt_all_end_mcast);
- else
- dev_mc_del(dev, dn_rt_all_rt_mcast);
-}
-
-static void dn_dev_set_timer(struct net_device *dev);
-
-static void dn_dev_timer_func(struct timer_list *t)
-{
- struct dn_dev *dn_db = from_timer(dn_db, t, timer);
- struct net_device *dev;
- struct dn_ifaddr *ifa;
-
- rcu_read_lock();
- dev = dn_db->dev;
- if (dn_db->t3 <= dn_db->parms.t2) {
- if (dn_db->parms.timer3) {
- for (ifa = rcu_dereference(dn_db->ifa_list);
- ifa;
- ifa = rcu_dereference(ifa->ifa_next)) {
- if (!(ifa->ifa_flags & IFA_F_SECONDARY))
- dn_db->parms.timer3(dev, ifa);
- }
- }
- dn_db->t3 = dn_db->parms.t3;
- } else {
- dn_db->t3 -= dn_db->parms.t2;
- }
- rcu_read_unlock();
- dn_dev_set_timer(dev);
-}
-
-static void dn_dev_set_timer(struct net_device *dev)
-{
- struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
-
- if (dn_db->parms.t2 > dn_db->parms.t3)
- dn_db->parms.t2 = dn_db->parms.t3;
-
- dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
-
- add_timer(&dn_db->timer);
-}
-
-static struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
-{
- int i;
- struct dn_dev_parms *p = dn_dev_list;
- struct dn_dev *dn_db;
-
- for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
- if (p->type == dev->type)
- break;
- }
-
- *err = -ENODEV;
- if (i == DN_DEV_LIST_SIZE)
- return NULL;
-
- *err = -ENOBUFS;
- if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
- return NULL;
-
- memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
-
- rcu_assign_pointer(dev->dn_ptr, dn_db);
- dn_db->dev = dev;
- timer_setup(&dn_db->timer, dn_dev_timer_func, 0);
-
- dn_db->uptime = jiffies;
-
- dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
- if (!dn_db->neigh_parms) {
- RCU_INIT_POINTER(dev->dn_ptr, NULL);
- kfree(dn_db);
- return NULL;
- }
-
- if (dn_db->parms.up) {
- if (dn_db->parms.up(dev) < 0) {
- neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
- dev->dn_ptr = NULL;
- kfree(dn_db);
- return NULL;
- }
- }
-
- dn_dev_sysctl_register(dev, &dn_db->parms);
-
- dn_dev_set_timer(dev);
-
- *err = 0;
- return dn_db;
-}
-
-
-/*
- * This processes a device up event. We only start up
- * the loopback device & ethernet devices with correct
- * MAC addresses automatically. Others must be started
- * specifically.
- *
- * FIXME: How should we configure the loopback address ? If we could dispense
- * with using decnet_address here and for autobind, it will be one less thing
- * for users to worry about setting up.
- */
-
-void dn_dev_up(struct net_device *dev)
-{
- struct dn_ifaddr *ifa;
- __le16 addr = decnet_address;
- int maybe_default = 0;
- struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
-
- if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
- return;
-
- /*
- * Need to ensure that loopback device has a dn_db attached to it
- * to allow creation of neighbours against it, even though it might
- * not have a local address of its own. Might as well do the same for
- * all autoconfigured interfaces.
- */
- if (dn_db == NULL) {
- int err;
- dn_db = dn_dev_create(dev, &err);
- if (dn_db == NULL)
- return;
- }
-
- if (dev->type == ARPHRD_ETHER) {
- if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
- return;
- addr = dn_eth2dn(dev->dev_addr);
- maybe_default = 1;
- }
-
- if (addr == 0)
- return;
-
- if ((ifa = dn_dev_alloc_ifa()) == NULL)
- return;
-
- ifa->ifa_local = ifa->ifa_address = addr;
- ifa->ifa_flags = 0;
- ifa->ifa_scope = RT_SCOPE_UNIVERSE;
- strcpy(ifa->ifa_label, dev->name);
-
- dn_dev_set_ifa(dev, ifa);
-
- /*
- * Automagically set the default device to the first automatically
- * configured ethernet card in the system.
- */
- if (maybe_default) {
- dev_hold(dev);
- if (dn_dev_set_default(dev, 0))
- dev_put(dev);
- }
-}
-
-static void dn_dev_delete(struct net_device *dev)
-{
- struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
-
- if (dn_db == NULL)
- return;
-
- del_timer_sync(&dn_db->timer);
- dn_dev_sysctl_unregister(&dn_db->parms);
- dn_dev_check_default(dev);
- neigh_ifdown(&dn_neigh_table, dev);
-
- if (dn_db->parms.down)
- dn_db->parms.down(dev);
-
- dev->dn_ptr = NULL;
-
- neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
- neigh_ifdown(&dn_neigh_table, dev);
-
- if (dn_db->router)
- neigh_release(dn_db->router);
- if (dn_db->peer)
- neigh_release(dn_db->peer);
-
- kfree(dn_db);
-}
-
-void dn_dev_down(struct net_device *dev)
-{
- struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
- struct dn_ifaddr *ifa;
-
- if (dn_db == NULL)
- return;
-
- while ((ifa = rtnl_dereference(dn_db->ifa_list)) != NULL) {
- dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
- dn_dev_free_ifa(ifa);
- }
-
- dn_dev_delete(dev);
-}
-
-void dn_dev_init_pkt(struct sk_buff *skb)
-{
-}
-
-void dn_dev_veri_pkt(struct sk_buff *skb)
-{
-}
-
-void dn_dev_hello(struct sk_buff *skb)
-{
-}
-
-void dn_dev_devices_off(void)
-{
- struct net_device *dev;
-
- rtnl_lock();
- for_each_netdev(&init_net, dev)
- dn_dev_down(dev);
- rtnl_unlock();
-
-}
-
-void dn_dev_devices_on(void)
-{
- struct net_device *dev;
-
- rtnl_lock();
- for_each_netdev(&init_net, dev) {
- if (dev->flags & IFF_UP)
- dn_dev_up(dev);
- }
- rtnl_unlock();
-}
-
-int register_dnaddr_notifier(struct notifier_block *nb)
-{
- return blocking_notifier_chain_register(&dnaddr_chain, nb);
-}
-
-int unregister_dnaddr_notifier(struct notifier_block *nb)
-{
- return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
-}
-
-#ifdef CONFIG_PROC_FS
-static inline int is_dn_dev(struct net_device *dev)
-{
- return dev->dn_ptr != NULL;
-}
-
-static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
- __acquires(RCU)
-{
- int i;
- struct net_device *dev;
-
- rcu_read_lock();
-
- if (*pos == 0)
- return SEQ_START_TOKEN;
-
- i = 1;
- for_each_netdev_rcu(&init_net, dev) {
- if (!is_dn_dev(dev))
- continue;
-
- if (i++ == *pos)
- return dev;
- }
-
- return NULL;
-}
-
-static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- struct net_device *dev;
-
- ++*pos;
-
- dev = v;
- if (v == SEQ_START_TOKEN)
- dev = net_device_entry(&init_net.dev_base_head);
-
- for_each_netdev_continue_rcu(&init_net, dev) {
- if (!is_dn_dev(dev))
- continue;
-
- return dev;
- }
-
- return NULL;
-}
-
-static void dn_dev_seq_stop(struct seq_file *seq, void *v)
- __releases(RCU)
-{
- rcu_read_unlock();
-}
-
-static char *dn_type2asc(char type)
-{
- switch (type) {
- case DN_DEV_BCAST:
- return "B";
- case DN_DEV_UCAST:
- return "U";
- case DN_DEV_MPOINT:
- return "M";
- }
-
- return "?";
-}
-
-static int dn_dev_seq_show(struct seq_file *seq, void *v)
-{
- if (v == SEQ_START_TOKEN)
- seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
- else {
- struct net_device *dev = v;
- char peer_buf[DN_ASCBUF_LEN];
- char router_buf[DN_ASCBUF_LEN];
- struct dn_dev *dn_db = rcu_dereference(dev->dn_ptr);
-
- seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
- " %04hu %03d %02x %-10s %-7s %-7s\n",
- dev->name,
- dn_type2asc(dn_db->parms.mode),
- 0, 0,
- dn_db->t3, dn_db->parms.t3,
- mtu2blksize(dev),
- dn_db->parms.priority,
- dn_db->parms.state, dn_db->parms.name,
- dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
- dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
- }
- return 0;
-}
-
-static const struct seq_operations dn_dev_seq_ops = {
- .start = dn_dev_seq_start,
- .next = dn_dev_seq_next,
- .stop = dn_dev_seq_stop,
- .show = dn_dev_seq_show,
-};
-#endif /* CONFIG_PROC_FS */
-
-static int addr[2];
-module_param_array(addr, int, NULL, 0444);
-MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
-
-void __init dn_dev_init(void)
-{
- if (addr[0] > 63 || addr[0] < 0) {
- printk(KERN_ERR "DECnet: Area must be between 0 and 63");
- return;
- }
-
- if (addr[1] > 1023 || addr[1] < 0) {
- printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
- return;
- }
-
- decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]);
-
- dn_dev_devices_on();
-
- rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_NEWADDR,
- dn_nl_newaddr, NULL, 0);
- rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_DELADDR,
- dn_nl_deladdr, NULL, 0);
- rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_GETADDR,
- NULL, dn_nl_dump_ifaddr, 0);
-
- proc_create_seq("decnet_dev", 0444, init_net.proc_net, &dn_dev_seq_ops);
-
-#ifdef CONFIG_SYSCTL
- {
- int i;
- for(i = 0; i < DN_DEV_LIST_SIZE; i++)
- dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
- }
-#endif /* CONFIG_SYSCTL */
-}
-
-void __exit dn_dev_cleanup(void)
-{
-#ifdef CONFIG_SYSCTL
- {
- int i;
- for(i = 0; i < DN_DEV_LIST_SIZE; i++)
- dn_dev_sysctl_unregister(&dn_dev_list[i]);
- }
-#endif /* CONFIG_SYSCTL */
-
- remove_proc_entry("decnet_dev", init_net.proc_net);
-
- dn_dev_devices_off();
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * DECnet An implementation of the DECnet protocol suite for the LINUX
- * operating system. DECnet is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * DECnet Routing Forwarding Information Base (Glue/Info List)
- *
- * Author: Steve Whitehouse <SteveW@ACM.org>
- *
- *
- * Changes:
- * Alexey Kuznetsov : SMP locking changes
- * Steve Whitehouse : Rewrote it... Well to be more correct, I
- * copied most of it from the ipv4 fib code.
- * Steve Whitehouse : Updated it in style and fixed a few bugs
- * which were fixed in the ipv4 code since
- * this code was copied from it.
- *
- */
-#include <linux/string.h>
-#include <linux/net.h>
-#include <linux/socket.h>
-#include <linux/slab.h>
-#include <linux/sockios.h>
-#include <linux/init.h>
-#include <linux/skbuff.h>
-#include <linux/netlink.h>
-#include <linux/rtnetlink.h>
-#include <linux/proc_fs.h>
-#include <linux/netdevice.h>
-#include <linux/timer.h>
-#include <linux/spinlock.h>
-#include <linux/atomic.h>
-#include <linux/uaccess.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/flow.h>
-#include <net/fib_rules.h>
-#include <net/dn.h>
-#include <net/dn_route.h>
-#include <net/dn_fib.h>
-#include <net/dn_neigh.h>
-#include <net/dn_dev.h>
-#include <net/rtnh.h>
-
-#define RT_MIN_TABLE 1
-
-#define for_fib_info() { struct dn_fib_info *fi;\
- for(fi = dn_fib_info_list; fi; fi = fi->fib_next)
-#define endfor_fib_info() }
-
-#define for_nexthops(fi) { int nhsel; const struct dn_fib_nh *nh;\
- for(nhsel = 0, nh = (fi)->fib_nh; nhsel < (fi)->fib_nhs; nh++, nhsel++)
-
-#define change_nexthops(fi) { int nhsel; struct dn_fib_nh *nh;\
- for(nhsel = 0, nh = (struct dn_fib_nh *)((fi)->fib_nh); nhsel < (fi)->fib_nhs; nh++, nhsel++)
-
-#define endfor_nexthops(fi) }
-
-static DEFINE_SPINLOCK(dn_fib_multipath_lock);
-static struct dn_fib_info *dn_fib_info_list;
-static DEFINE_SPINLOCK(dn_fib_info_lock);
-
-static struct
-{
- int error;
- u8 scope;
-} dn_fib_props[RTN_MAX+1] = {
- [RTN_UNSPEC] = { .error = 0, .scope = RT_SCOPE_NOWHERE },
- [RTN_UNICAST] = { .error = 0, .scope = RT_SCOPE_UNIVERSE },
- [RTN_LOCAL] = { .error = 0, .scope = RT_SCOPE_HOST },
- [RTN_BROADCAST] = { .error = -EINVAL, .scope = RT_SCOPE_NOWHERE },
- [RTN_ANYCAST] = { .error = -EINVAL, .scope = RT_SCOPE_NOWHERE },
- [RTN_MULTICAST] = { .error = -EINVAL, .scope = RT_SCOPE_NOWHERE },
- [RTN_BLACKHOLE] = { .error = -EINVAL, .scope = RT_SCOPE_UNIVERSE },
- [RTN_UNREACHABLE] = { .error = -EHOSTUNREACH, .scope = RT_SCOPE_UNIVERSE },
- [RTN_PROHIBIT] = { .error = -EACCES, .scope = RT_SCOPE_UNIVERSE },
- [RTN_THROW] = { .error = -EAGAIN, .scope = RT_SCOPE_UNIVERSE },
- [RTN_NAT] = { .error = 0, .scope = RT_SCOPE_NOWHERE },
- [RTN_XRESOLVE] = { .error = -EINVAL, .scope = RT_SCOPE_NOWHERE },
-};
-
-static int dn_fib_sync_down(__le16 local, struct net_device *dev, int force);
-static int dn_fib_sync_up(struct net_device *dev);
-
-void dn_fib_free_info(struct dn_fib_info *fi)
-{
- if (fi->fib_dead == 0) {
- printk(KERN_DEBUG "DECnet: BUG! Attempt to free alive dn_fib_info\n");
- return;
- }
-
- change_nexthops(fi) {
- dev_put(nh->nh_dev);
- nh->nh_dev = NULL;
- } endfor_nexthops(fi);
- kfree(fi);
-}
-
-void dn_fib_release_info(struct dn_fib_info *fi)
-{
- spin_lock(&dn_fib_info_lock);
- if (fi && refcount_dec_and_test(&fi->fib_treeref)) {
- if (fi->fib_next)
- fi->fib_next->fib_prev = fi->fib_prev;
- if (fi->fib_prev)
- fi->fib_prev->fib_next = fi->fib_next;
- if (fi == dn_fib_info_list)
- dn_fib_info_list = fi->fib_next;
- fi->fib_dead = 1;
- dn_fib_info_put(fi);
- }
- spin_unlock(&dn_fib_info_lock);
-}
-
-static inline int dn_fib_nh_comp(const struct dn_fib_info *fi, const struct dn_fib_info *ofi)
-{
- const struct dn_fib_nh *onh = ofi->fib_nh;
-
- for_nexthops(fi) {
- if (nh->nh_oif != onh->nh_oif ||
- nh->nh_gw != onh->nh_gw ||
- nh->nh_scope != onh->nh_scope ||
- nh->nh_weight != onh->nh_weight ||
- ((nh->nh_flags^onh->nh_flags)&~RTNH_F_DEAD))
- return -1;
- onh++;
- } endfor_nexthops(fi);
- return 0;
-}
-
-static inline struct dn_fib_info *dn_fib_find_info(const struct dn_fib_info *nfi)
-{
- for_fib_info() {
- if (fi->fib_nhs != nfi->fib_nhs)
- continue;
- if (nfi->fib_protocol == fi->fib_protocol &&
- nfi->fib_prefsrc == fi->fib_prefsrc &&
- nfi->fib_priority == fi->fib_priority &&
- memcmp(nfi->fib_metrics, fi->fib_metrics, sizeof(fi->fib_metrics)) == 0 &&
- ((nfi->fib_flags^fi->fib_flags)&~RTNH_F_DEAD) == 0 &&
- (nfi->fib_nhs == 0 || dn_fib_nh_comp(fi, nfi) == 0))
- return fi;
- } endfor_fib_info();
- return NULL;
-}
-
-static int dn_fib_count_nhs(const struct nlattr *attr)
-{
- struct rtnexthop *nhp = nla_data(attr);
- int nhs = 0, nhlen = nla_len(attr);
-
- while (rtnh_ok(nhp, nhlen)) {
- nhs++;
- nhp = rtnh_next(nhp, &nhlen);
- }
-
- /* leftover implies invalid nexthop configuration, discard it */
- return nhlen > 0 ? 0 : nhs;
-}
-
-static int dn_fib_get_nhs(struct dn_fib_info *fi, const struct nlattr *attr,
- const struct rtmsg *r)
-{
- struct rtnexthop *nhp = nla_data(attr);
- int nhlen = nla_len(attr);
-
- change_nexthops(fi) {
- int attrlen;
-
- if (!rtnh_ok(nhp, nhlen))
- return -EINVAL;
-
- nh->nh_flags = (r->rtm_flags&~0xFF) | nhp->rtnh_flags;
- nh->nh_oif = nhp->rtnh_ifindex;
- nh->nh_weight = nhp->rtnh_hops + 1;
-
- attrlen = rtnh_attrlen(nhp);
- if (attrlen > 0) {
- struct nlattr *gw_attr;
-
- gw_attr = nla_find((struct nlattr *) (nhp + 1), attrlen, RTA_GATEWAY);
- nh->nh_gw = gw_attr ? nla_get_le16(gw_attr) : 0;
- }
-
- nhp = rtnh_next(nhp, &nhlen);
- } endfor_nexthops(fi);
-
- return 0;
-}
-
-
-static int dn_fib_check_nh(const struct rtmsg *r, struct dn_fib_info *fi, struct dn_fib_nh *nh)
-{
- int err;
-
- if (nh->nh_gw) {
- struct flowidn fld;
- struct dn_fib_res res;
-
- if (nh->nh_flags&RTNH_F_ONLINK) {
- struct net_device *dev;
-
- if (r->rtm_scope >= RT_SCOPE_LINK)
- return -EINVAL;
- if (dnet_addr_type(nh->nh_gw) != RTN_UNICAST)
- return -EINVAL;
- if ((dev = __dev_get_by_index(&init_net, nh->nh_oif)) == NULL)
- return -ENODEV;
- if (!(dev->flags&IFF_UP))
- return -ENETDOWN;
- nh->nh_dev = dev;
- dev_hold(dev);
- nh->nh_scope = RT_SCOPE_LINK;
- return 0;
- }
-
- memset(&fld, 0, sizeof(fld));
- fld.daddr = nh->nh_gw;
- fld.flowidn_oif = nh->nh_oif;
- fld.flowidn_scope = r->rtm_scope + 1;
-
- if (fld.flowidn_scope < RT_SCOPE_LINK)
- fld.flowidn_scope = RT_SCOPE_LINK;
-
- if ((err = dn_fib_lookup(&fld, &res)) != 0)
- return err;
-
- err = -EINVAL;
- if (res.type != RTN_UNICAST && res.type != RTN_LOCAL)
- goto out;
- nh->nh_scope = res.scope;
- nh->nh_oif = DN_FIB_RES_OIF(res);
- nh->nh_dev = DN_FIB_RES_DEV(res);
- if (nh->nh_dev == NULL)
- goto out;
- dev_hold(nh->nh_dev);
- err = -ENETDOWN;
- if (!(nh->nh_dev->flags & IFF_UP))
- goto out;
- err = 0;
-out:
- dn_fib_res_put(&res);
- return err;
- } else {
- struct net_device *dev;
-
- if (nh->nh_flags&(RTNH_F_PERVASIVE|RTNH_F_ONLINK))
- return -EINVAL;
-
- dev = __dev_get_by_index(&init_net, nh->nh_oif);
- if (dev == NULL || dev->dn_ptr == NULL)
- return -ENODEV;
- if (!(dev->flags&IFF_UP))
- return -ENETDOWN;
- nh->nh_dev = dev;
- dev_hold(nh->nh_dev);
- nh->nh_scope = RT_SCOPE_HOST;
- }
-
- return 0;
-}
-
-
-struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r, struct nlattr *attrs[],
- const struct nlmsghdr *nlh, int *errp)
-{
- int err;
- struct dn_fib_info *fi = NULL;
- struct dn_fib_info *ofi;
- int nhs = 1;
-
- if (r->rtm_type > RTN_MAX)
- goto err_inval;
-
- if (dn_fib_props[r->rtm_type].scope > r->rtm_scope)
- goto err_inval;
-
- if (attrs[RTA_MULTIPATH] &&
- (nhs = dn_fib_count_nhs(attrs[RTA_MULTIPATH])) == 0)
- goto err_inval;
-
- fi = kzalloc(struct_size(fi, fib_nh, nhs), GFP_KERNEL);
- err = -ENOBUFS;
- if (fi == NULL)
- goto failure;
-
- fi->fib_protocol = r->rtm_protocol;
- fi->fib_nhs = nhs;
- fi->fib_flags = r->rtm_flags;
-
- if (attrs[RTA_PRIORITY])
- fi->fib_priority = nla_get_u32(attrs[RTA_PRIORITY]);
-
- if (attrs[RTA_METRICS]) {
- struct nlattr *attr;
- int rem;
-
- nla_for_each_nested(attr, attrs[RTA_METRICS], rem) {
- int type = nla_type(attr);
-
- if (type) {
- if (type > RTAX_MAX || type == RTAX_CC_ALGO ||
- nla_len(attr) < 4)
- goto err_inval;
-
- fi->fib_metrics[type-1] = nla_get_u32(attr);
- }
- }
- }
-
- if (attrs[RTA_PREFSRC])
- fi->fib_prefsrc = nla_get_le16(attrs[RTA_PREFSRC]);
-
- if (attrs[RTA_MULTIPATH]) {
- if ((err = dn_fib_get_nhs(fi, attrs[RTA_MULTIPATH], r)) != 0)
- goto failure;
-
- if (attrs[RTA_OIF] &&
- fi->fib_nh->nh_oif != nla_get_u32(attrs[RTA_OIF]))
- goto err_inval;
-
- if (attrs[RTA_GATEWAY] &&
- fi->fib_nh->nh_gw != nla_get_le16(attrs[RTA_GATEWAY]))
- goto err_inval;
- } else {
- struct dn_fib_nh *nh = fi->fib_nh;
-
- if (attrs[RTA_OIF])
- nh->nh_oif = nla_get_u32(attrs[RTA_OIF]);
-
- if (attrs[RTA_GATEWAY])
- nh->nh_gw = nla_get_le16(attrs[RTA_GATEWAY]);
-
- nh->nh_flags = r->rtm_flags;
- nh->nh_weight = 1;
- }
-
- if (r->rtm_type == RTN_NAT) {
- if (!attrs[RTA_GATEWAY] || nhs != 1 || attrs[RTA_OIF])
- goto err_inval;
-
- fi->fib_nh->nh_gw = nla_get_le16(attrs[RTA_GATEWAY]);
- goto link_it;
- }
-
- if (dn_fib_props[r->rtm_type].error) {
- if (attrs[RTA_GATEWAY] || attrs[RTA_OIF] || attrs[RTA_MULTIPATH])
- goto err_inval;
-
- goto link_it;
- }
-
- if (r->rtm_scope > RT_SCOPE_HOST)
- goto err_inval;
-
- if (r->rtm_scope == RT_SCOPE_HOST) {
- struct dn_fib_nh *nh = fi->fib_nh;
-
- /* Local address is added */
- if (nhs != 1 || nh->nh_gw)
- goto err_inval;
- nh->nh_scope = RT_SCOPE_NOWHERE;
- nh->nh_dev = dev_get_by_index(&init_net, fi->fib_nh->nh_oif);
- err = -ENODEV;
- if (nh->nh_dev == NULL)
- goto failure;
- } else {
- change_nexthops(fi) {
- if ((err = dn_fib_check_nh(r, fi, nh)) != 0)
- goto failure;
- } endfor_nexthops(fi)
- }
-
- if (fi->fib_prefsrc) {
- if (r->rtm_type != RTN_LOCAL || !attrs[RTA_DST] ||
- fi->fib_prefsrc != nla_get_le16(attrs[RTA_DST]))
- if (dnet_addr_type(fi->fib_prefsrc) != RTN_LOCAL)
- goto err_inval;
- }
-
-link_it:
- if ((ofi = dn_fib_find_info(fi)) != NULL) {
- fi->fib_dead = 1;
- dn_fib_free_info(fi);
- refcount_inc(&ofi->fib_treeref);
- return ofi;
- }
-
- refcount_set(&fi->fib_treeref, 1);
- refcount_set(&fi->fib_clntref, 1);
- spin_lock(&dn_fib_info_lock);
- fi->fib_next = dn_fib_info_list;
- fi->fib_prev = NULL;
- if (dn_fib_info_list)
- dn_fib_info_list->fib_prev = fi;
- dn_fib_info_list = fi;
- spin_unlock(&dn_fib_info_lock);
- return fi;
-
-err_inval:
- err = -EINVAL;
-
-failure:
- *errp = err;
- if (fi) {
- fi->fib_dead = 1;
- dn_fib_free_info(fi);
- }
-
- return NULL;
-}
-
-int dn_fib_semantic_match(int type, struct dn_fib_info *fi, const struct flowidn *fld, struct dn_fib_res *res)
-{
- int err = dn_fib_props[type].error;
-
- if (err == 0) {
- if (fi->fib_flags & RTNH_F_DEAD)
- return 1;
-
- res->fi = fi;
-
- switch (type) {
- case RTN_NAT:
- DN_FIB_RES_RESET(*res);
- refcount_inc(&fi->fib_clntref);
- return 0;
- case RTN_UNICAST:
- case RTN_LOCAL:
- for_nexthops(fi) {
- if (nh->nh_flags & RTNH_F_DEAD)
- continue;
- if (!fld->flowidn_oif ||
- fld->flowidn_oif == nh->nh_oif)
- break;
- }
- if (nhsel < fi->fib_nhs) {
- res->nh_sel = nhsel;
- refcount_inc(&fi->fib_clntref);
- return 0;
- }
- endfor_nexthops(fi);
- res->fi = NULL;
- return 1;
- default:
- net_err_ratelimited("DECnet: impossible routing event : dn_fib_semantic_match type=%d\n",
- type);
- res->fi = NULL;
- return -EINVAL;
- }
- }
- return err;
-}
-
-void dn_fib_select_multipath(const struct flowidn *fld, struct dn_fib_res *res)
-{
- struct dn_fib_info *fi = res->fi;
- int w;
-
- spin_lock_bh(&dn_fib_multipath_lock);
- if (fi->fib_power <= 0) {
- int power = 0;
- change_nexthops(fi) {
- if (!(nh->nh_flags&RTNH_F_DEAD)) {
- power += nh->nh_weight;
- nh->nh_power = nh->nh_weight;
- }
- } endfor_nexthops(fi);
- fi->fib_power = power;
- if (power < 0) {
- spin_unlock_bh(&dn_fib_multipath_lock);
- res->nh_sel = 0;
- return;
- }
- }
-
- w = jiffies % fi->fib_power;
-
- change_nexthops(fi) {
- if (!(nh->nh_flags&RTNH_F_DEAD) && nh->nh_power) {
- if ((w -= nh->nh_power) <= 0) {
- nh->nh_power--;
- fi->fib_power--;
- res->nh_sel = nhsel;
- spin_unlock_bh(&dn_fib_multipath_lock);
- return;
- }
- }
- } endfor_nexthops(fi);
- res->nh_sel = 0;
- spin_unlock_bh(&dn_fib_multipath_lock);
-}
-
-static inline u32 rtm_get_table(struct nlattr *attrs[], u8 table)
-{
- if (attrs[RTA_TABLE])
- table = nla_get_u32(attrs[RTA_TABLE]);
-
- return table;
-}
-
-static int dn_fib_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct netlink_ext_ack *extack)
-{
- struct net *net = sock_net(skb->sk);
- struct dn_fib_table *tb;
- struct rtmsg *r = nlmsg_data(nlh);
- struct nlattr *attrs[RTA_MAX+1];
- int err;
-
- if (!netlink_capable(skb, CAP_NET_ADMIN))
- return -EPERM;
-
- if (!net_eq(net, &init_net))
- return -EINVAL;
-
- err = nlmsg_parse_deprecated(nlh, sizeof(*r), attrs, RTA_MAX,
- rtm_dn_policy, extack);
- if (err < 0)
- return err;
-
- tb = dn_fib_get_table(rtm_get_table(attrs, r->rtm_table), 0);
- if (!tb)
- return -ESRCH;
-
- return tb->delete(tb, r, attrs, nlh, &NETLINK_CB(skb));
-}
-
-static int dn_fib_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct netlink_ext_ack *extack)
-{
- struct net *net = sock_net(skb->sk);
- struct dn_fib_table *tb;
- struct rtmsg *r = nlmsg_data(nlh);
- struct nlattr *attrs[RTA_MAX+1];
- int err;
-
- if (!netlink_capable(skb, CAP_NET_ADMIN))
- return -EPERM;
-
- if (!net_eq(net, &init_net))
- return -EINVAL;
-
- err = nlmsg_parse_deprecated(nlh, sizeof(*r), attrs, RTA_MAX,
- rtm_dn_policy, extack);
- if (err < 0)
- return err;
-
- tb = dn_fib_get_table(rtm_get_table(attrs, r->rtm_table), 1);
- if (!tb)
- return -ENOBUFS;
-
- return tb->insert(tb, r, attrs, nlh, &NETLINK_CB(skb));
-}
-
-static void fib_magic(int cmd, int type, __le16 dst, int dst_len, struct dn_ifaddr *ifa)
-{
- struct dn_fib_table *tb;
- struct {
- struct nlmsghdr nlh;
- struct rtmsg rtm;
- } req;
- struct {
- struct nlattr hdr;
- __le16 dst;
- } dst_attr = {
- .dst = dst,
- };
- struct {
- struct nlattr hdr;
- __le16 prefsrc;
- } prefsrc_attr = {
- .prefsrc = ifa->ifa_local,
- };
- struct {
- struct nlattr hdr;
- u32 oif;
- } oif_attr = {
- .oif = ifa->ifa_dev->dev->ifindex,
- };
- struct nlattr *attrs[RTA_MAX+1] = {
- [RTA_DST] = (struct nlattr *) &dst_attr,
- [RTA_PREFSRC] = (struct nlattr * ) &prefsrc_attr,
- [RTA_OIF] = (struct nlattr *) &oif_attr,
- };
-
- memset(&req.rtm, 0, sizeof(req.rtm));
-
- if (type == RTN_UNICAST)
- tb = dn_fib_get_table(RT_MIN_TABLE, 1);
- else
- tb = dn_fib_get_table(RT_TABLE_LOCAL, 1);
-
- if (tb == NULL)
- return;
-
- req.nlh.nlmsg_len = sizeof(req);
- req.nlh.nlmsg_type = cmd;
- req.nlh.nlmsg_flags = NLM_F_REQUEST|NLM_F_CREATE|NLM_F_APPEND;
- req.nlh.nlmsg_pid = 0;
- req.nlh.nlmsg_seq = 0;
-
- req.rtm.rtm_dst_len = dst_len;
- req.rtm.rtm_table = tb->n;
- req.rtm.rtm_protocol = RTPROT_KERNEL;
- req.rtm.rtm_scope = (type != RTN_LOCAL ? RT_SCOPE_LINK : RT_SCOPE_HOST);
- req.rtm.rtm_type = type;
-
- if (cmd == RTM_NEWROUTE)
- tb->insert(tb, &req.rtm, attrs, &req.nlh, NULL);
- else
- tb->delete(tb, &req.rtm, attrs, &req.nlh, NULL);
-}
-
-static void dn_fib_add_ifaddr(struct dn_ifaddr *ifa)
-{
-
- fib_magic(RTM_NEWROUTE, RTN_LOCAL, ifa->ifa_local, 16, ifa);
-
-#if 0
- if (!(dev->flags&IFF_UP))
- return;
- /* In the future, we will want to add default routes here */
-
-#endif
-}
-
-static void dn_fib_del_ifaddr(struct dn_ifaddr *ifa)
-{
- int found_it = 0;
- struct net_device *dev;
- struct dn_dev *dn_db;
- struct dn_ifaddr *ifa2;
-
- ASSERT_RTNL();
-
- /* Scan device list */
- rcu_read_lock();
- for_each_netdev_rcu(&init_net, dev) {
- dn_db = rcu_dereference(dev->dn_ptr);
- if (dn_db == NULL)
- continue;
- for (ifa2 = rcu_dereference(dn_db->ifa_list);
- ifa2 != NULL;
- ifa2 = rcu_dereference(ifa2->ifa_next)) {
- if (ifa2->ifa_local == ifa->ifa_local) {
- found_it = 1;
- break;
- }
- }
- }
- rcu_read_unlock();
-
- if (found_it == 0) {
- fib_magic(RTM_DELROUTE, RTN_LOCAL, ifa->ifa_local, 16, ifa);
-
- if (dnet_addr_type(ifa->ifa_local) != RTN_LOCAL) {
- if (dn_fib_sync_down(ifa->ifa_local, NULL, 0))
- dn_fib_flush();
- }
- }
-}
-
-static void dn_fib_disable_addr(struct net_device *dev, int force)
-{
- if (dn_fib_sync_down(0, dev, force))
- dn_fib_flush();
- dn_rt_cache_flush(0);
- neigh_ifdown(&dn_neigh_table, dev);
-}
-
-static int dn_fib_dnaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
-{
- struct dn_ifaddr *ifa = (struct dn_ifaddr *)ptr;
-
- switch (event) {
- case NETDEV_UP:
- dn_fib_add_ifaddr(ifa);
- dn_fib_sync_up(ifa->ifa_dev->dev);
- dn_rt_cache_flush(-1);
- break;
- case NETDEV_DOWN:
- dn_fib_del_ifaddr(ifa);
- if (ifa->ifa_dev && ifa->ifa_dev->ifa_list == NULL) {
- dn_fib_disable_addr(ifa->ifa_dev->dev, 1);
- } else {
- dn_rt_cache_flush(-1);
- }
- break;
- }
- return NOTIFY_DONE;
-}
-
-static int dn_fib_sync_down(__le16 local, struct net_device *dev, int force)
-{
- int ret = 0;
- int scope = RT_SCOPE_NOWHERE;
-
- if (force)
- scope = -1;
-
- for_fib_info() {
- /*
- * This makes no sense for DECnet.... we will almost
- * certainly have more than one local address the same
- * over all our interfaces. It needs thinking about
- * some more.
- */
- if (local && fi->fib_prefsrc == local) {
- fi->fib_flags |= RTNH_F_DEAD;
- ret++;
- } else if (dev && fi->fib_nhs) {
- int dead = 0;
-
- change_nexthops(fi) {
- if (nh->nh_flags&RTNH_F_DEAD)
- dead++;
- else if (nh->nh_dev == dev &&
- nh->nh_scope != scope) {
- spin_lock_bh(&dn_fib_multipath_lock);
- nh->nh_flags |= RTNH_F_DEAD;
- fi->fib_power -= nh->nh_power;
- nh->nh_power = 0;
- spin_unlock_bh(&dn_fib_multipath_lock);
- dead++;
- }
- } endfor_nexthops(fi)
- if (dead == fi->fib_nhs) {
- fi->fib_flags |= RTNH_F_DEAD;
- ret++;
- }
- }
- } endfor_fib_info();
- return ret;
-}
-
-
-static int dn_fib_sync_up(struct net_device *dev)
-{
- int ret = 0;
-
- if (!(dev->flags&IFF_UP))
- return 0;
-
- for_fib_info() {
- int alive = 0;
-
- change_nexthops(fi) {
- if (!(nh->nh_flags&RTNH_F_DEAD)) {
- alive++;
- continue;
- }
- if (nh->nh_dev == NULL || !(nh->nh_dev->flags&IFF_UP))
- continue;
- if (nh->nh_dev != dev || dev->dn_ptr == NULL)
- continue;
- alive++;
- spin_lock_bh(&dn_fib_multipath_lock);
- nh->nh_power = 0;
- nh->nh_flags &= ~RTNH_F_DEAD;
- spin_unlock_bh(&dn_fib_multipath_lock);
- } endfor_nexthops(fi);
-
- if (alive > 0) {
- fi->fib_flags &= ~RTNH_F_DEAD;
- ret++;
- }
- } endfor_fib_info();
- return ret;
-}
-
-static struct notifier_block dn_fib_dnaddr_notifier = {
- .notifier_call = dn_fib_dnaddr_event,
-};
-
-void __exit dn_fib_cleanup(void)
-{
- dn_fib_table_cleanup();
- dn_fib_rules_cleanup();
-
- unregister_dnaddr_notifier(&dn_fib_dnaddr_notifier);
-}
-
-
-void __init dn_fib_init(void)
-{
- dn_fib_table_init();
- dn_fib_rules_init();
-
- register_dnaddr_notifier(&dn_fib_dnaddr_notifier);
-
- rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_NEWROUTE,
- dn_fib_rtm_newroute, NULL, 0);
- rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_DELROUTE,
- dn_fib_rtm_delroute, NULL, 0);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * DECnet An implementation of the DECnet protocol suite for the LINUX
- * operating system. DECnet is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * DECnet Neighbour Functions (Adjacency Database and
- * On-Ethernet Cache)
- *
- * Author: Steve Whitehouse <SteveW@ACM.org>
- *
- *
- * Changes:
- * Steve Whitehouse : Fixed router listing routine
- * Steve Whitehouse : Added error_report functions
- * Steve Whitehouse : Added default router detection
- * Steve Whitehouse : Hop counts in outgoing messages
- * Steve Whitehouse : Fixed src/dst in outgoing messages so
- * forwarding now stands a good chance of
- * working.
- * Steve Whitehouse : Fixed neighbour states (for now anyway).
- * Steve Whitehouse : Made error_report functions dummies. This
- * is not the right place to return skbs.
- * Steve Whitehouse : Convert to seq_file
- *
- */
-
-#include <linux/net.h>
-#include <linux/module.h>
-#include <linux/socket.h>
-#include <linux/if_arp.h>
-#include <linux/slab.h>
-#include <linux/if_ether.h>
-#include <linux/init.h>
-#include <linux/proc_fs.h>
-#include <linux/string.h>
-#include <linux/netfilter_decnet.h>
-#include <linux/spinlock.h>
-#include <linux/seq_file.h>
-#include <linux/rcupdate.h>
-#include <linux/jhash.h>
-#include <linux/atomic.h>
-#include <net/net_namespace.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/flow.h>
-#include <net/dn.h>
-#include <net/dn_dev.h>
-#include <net/dn_neigh.h>
-#include <net/dn_route.h>
-
-static int dn_neigh_construct(struct neighbour *);
-static void dn_neigh_error_report(struct neighbour *, struct sk_buff *);
-static int dn_neigh_output(struct neighbour *neigh, struct sk_buff *skb);
-
-/*
- * Operations for adding the link layer header.
- */
-static const struct neigh_ops dn_neigh_ops = {
- .family = AF_DECnet,
- .error_report = dn_neigh_error_report,
- .output = dn_neigh_output,
- .connected_output = dn_neigh_output,
-};
-
-static u32 dn_neigh_hash(const void *pkey,
- const struct net_device *dev,
- __u32 *hash_rnd)
-{
- return jhash_2words(*(__u16 *)pkey, 0, hash_rnd[0]);
-}
-
-static bool dn_key_eq(const struct neighbour *neigh, const void *pkey)
-{
- return neigh_key_eq16(neigh, pkey);
-}
-
-struct neigh_table dn_neigh_table = {
- .family = PF_DECnet,
- .entry_size = NEIGH_ENTRY_SIZE(sizeof(struct dn_neigh)),
- .key_len = sizeof(__le16),
- .protocol = cpu_to_be16(ETH_P_DNA_RT),
- .hash = dn_neigh_hash,
- .key_eq = dn_key_eq,
- .constructor = dn_neigh_construct,
- .id = "dn_neigh_cache",
- .parms ={
- .tbl = &dn_neigh_table,
- .reachable_time = 30 * HZ,
- .data = {
- [NEIGH_VAR_MCAST_PROBES] = 0,
- [NEIGH_VAR_UCAST_PROBES] = 0,
- [NEIGH_VAR_APP_PROBES] = 0,
- [NEIGH_VAR_RETRANS_TIME] = 1 * HZ,
- [NEIGH_VAR_BASE_REACHABLE_TIME] = 30 * HZ,
- [NEIGH_VAR_DELAY_PROBE_TIME] = 5 * HZ,
- [NEIGH_VAR_INTERVAL_PROBE_TIME_MS] = 5 * HZ,
- [NEIGH_VAR_GC_STALETIME] = 60 * HZ,
- [NEIGH_VAR_QUEUE_LEN_BYTES] = SK_WMEM_MAX,
- [NEIGH_VAR_PROXY_QLEN] = 0,
- [NEIGH_VAR_ANYCAST_DELAY] = 0,
- [NEIGH_VAR_PROXY_DELAY] = 0,
- [NEIGH_VAR_LOCKTIME] = 1 * HZ,
- },
- },
- .gc_interval = 30 * HZ,
- .gc_thresh1 = 128,
- .gc_thresh2 = 512,
- .gc_thresh3 = 1024,
-};
-
-static int dn_neigh_construct(struct neighbour *neigh)
-{
- struct net_device *dev = neigh->dev;
- struct dn_neigh *dn = container_of(neigh, struct dn_neigh, n);
- struct dn_dev *dn_db;
- struct neigh_parms *parms;
-
- rcu_read_lock();
- dn_db = rcu_dereference(dev->dn_ptr);
- if (dn_db == NULL) {
- rcu_read_unlock();
- return -EINVAL;
- }
-
- parms = dn_db->neigh_parms;
- if (!parms) {
- rcu_read_unlock();
- return -EINVAL;
- }
-
- __neigh_parms_put(neigh->parms);
- neigh->parms = neigh_parms_clone(parms);
- rcu_read_unlock();
-
- neigh->ops = &dn_neigh_ops;
- neigh->nud_state = NUD_NOARP;
- neigh->output = neigh->ops->connected_output;
-
- if ((dev->type == ARPHRD_IPGRE) || (dev->flags & IFF_POINTOPOINT))
- memcpy(neigh->ha, dev->broadcast, dev->addr_len);
- else if ((dev->type == ARPHRD_ETHER) || (dev->type == ARPHRD_LOOPBACK))
- dn_dn2eth(neigh->ha, dn->addr);
- else {
- net_dbg_ratelimited("Trying to create neigh for hw %d\n",
- dev->type);
- return -EINVAL;
- }
-
- /*
- * Make an estimate of the remote block size by assuming that its
- * two less then the device mtu, which it true for ethernet (and
- * other things which support long format headers) since there is
- * an extra length field (of 16 bits) which isn't part of the
- * ethernet headers and which the DECnet specs won't admit is part
- * of the DECnet routing headers either.
- *
- * If we over estimate here its no big deal, the NSP negotiations
- * will prevent us from sending packets which are too large for the
- * remote node to handle. In any case this figure is normally updated
- * by a hello message in most cases.
- */
- dn->blksize = dev->mtu - 2;
-
- return 0;
-}
-
-static void dn_neigh_error_report(struct neighbour *neigh, struct sk_buff *skb)
-{
- printk(KERN_DEBUG "dn_neigh_error_report: called\n");
- kfree_skb(skb);
-}
-
-static int dn_neigh_output(struct neighbour *neigh, struct sk_buff *skb)
-{
- struct dst_entry *dst = skb_dst(skb);
- struct dn_route *rt = (struct dn_route *)dst;
- struct net_device *dev = neigh->dev;
- char mac_addr[ETH_ALEN];
- unsigned int seq;
- int err;
-
- dn_dn2eth(mac_addr, rt->rt_local_src);
- do {
- seq = read_seqbegin(&neigh->ha_lock);
- err = dev_hard_header(skb, dev, ntohs(skb->protocol),
- neigh->ha, mac_addr, skb->len);
- } while (read_seqretry(&neigh->ha_lock, seq));
-
- if (err >= 0)
- err = dev_queue_xmit(skb);
- else {
- kfree_skb(skb);
- err = -EINVAL;
- }
- return err;
-}
-
-static int dn_neigh_output_packet(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
- struct dst_entry *dst = skb_dst(skb);
- struct dn_route *rt = (struct dn_route *)dst;
- struct neighbour *neigh = rt->n;
-
- return neigh->output(neigh, skb);
-}
-
-/*
- * For talking to broadcast devices: Ethernet & PPP
- */
-static int dn_long_output(struct neighbour *neigh, struct sock *sk,
- struct sk_buff *skb)
-{
- struct net_device *dev = neigh->dev;
- int headroom = dev->hard_header_len + sizeof(struct dn_long_packet) + 3;
- unsigned char *data;
- struct dn_long_packet *lp;
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
-
-
- if (skb_headroom(skb) < headroom) {
- struct sk_buff *skb2 = skb_realloc_headroom(skb, headroom);
- if (skb2 == NULL) {
- net_crit_ratelimited("dn_long_output: no memory\n");
- kfree_skb(skb);
- return -ENOBUFS;
- }
- consume_skb(skb);
- skb = skb2;
- net_info_ratelimited("dn_long_output: Increasing headroom\n");
- }
-
- data = skb_push(skb, sizeof(struct dn_long_packet) + 3);
- lp = (struct dn_long_packet *)(data+3);
-
- *((__le16 *)data) = cpu_to_le16(skb->len - 2);
- *(data + 2) = 1 | DN_RT_F_PF; /* Padding */
-
- lp->msgflg = DN_RT_PKT_LONG|(cb->rt_flags&(DN_RT_F_IE|DN_RT_F_RQR|DN_RT_F_RTS));
- lp->d_area = lp->d_subarea = 0;
- dn_dn2eth(lp->d_id, cb->dst);
- lp->s_area = lp->s_subarea = 0;
- dn_dn2eth(lp->s_id, cb->src);
- lp->nl2 = 0;
- lp->visit_ct = cb->hops & 0x3f;
- lp->s_class = 0;
- lp->pt = 0;
-
- skb_reset_network_header(skb);
-
- return NF_HOOK(NFPROTO_DECNET, NF_DN_POST_ROUTING,
- &init_net, sk, skb, NULL, neigh->dev,
- dn_neigh_output_packet);
-}
-
-/*
- * For talking to pointopoint and multidrop devices: DDCMP and X.25
- */
-static int dn_short_output(struct neighbour *neigh, struct sock *sk,
- struct sk_buff *skb)
-{
- struct net_device *dev = neigh->dev;
- int headroom = dev->hard_header_len + sizeof(struct dn_short_packet) + 2;
- struct dn_short_packet *sp;
- unsigned char *data;
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
-
-
- if (skb_headroom(skb) < headroom) {
- struct sk_buff *skb2 = skb_realloc_headroom(skb, headroom);
- if (skb2 == NULL) {
- net_crit_ratelimited("dn_short_output: no memory\n");
- kfree_skb(skb);
- return -ENOBUFS;
- }
- consume_skb(skb);
- skb = skb2;
- net_info_ratelimited("dn_short_output: Increasing headroom\n");
- }
-
- data = skb_push(skb, sizeof(struct dn_short_packet) + 2);
- *((__le16 *)data) = cpu_to_le16(skb->len - 2);
- sp = (struct dn_short_packet *)(data+2);
-
- sp->msgflg = DN_RT_PKT_SHORT|(cb->rt_flags&(DN_RT_F_RQR|DN_RT_F_RTS));
- sp->dstnode = cb->dst;
- sp->srcnode = cb->src;
- sp->forward = cb->hops & 0x3f;
-
- skb_reset_network_header(skb);
-
- return NF_HOOK(NFPROTO_DECNET, NF_DN_POST_ROUTING,
- &init_net, sk, skb, NULL, neigh->dev,
- dn_neigh_output_packet);
-}
-
-/*
- * For talking to DECnet phase III nodes
- * Phase 3 output is the same as short output, execpt that
- * it clears the area bits before transmission.
- */
-static int dn_phase3_output(struct neighbour *neigh, struct sock *sk,
- struct sk_buff *skb)
-{
- struct net_device *dev = neigh->dev;
- int headroom = dev->hard_header_len + sizeof(struct dn_short_packet) + 2;
- struct dn_short_packet *sp;
- unsigned char *data;
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
-
- if (skb_headroom(skb) < headroom) {
- struct sk_buff *skb2 = skb_realloc_headroom(skb, headroom);
- if (skb2 == NULL) {
- net_crit_ratelimited("dn_phase3_output: no memory\n");
- kfree_skb(skb);
- return -ENOBUFS;
- }
- consume_skb(skb);
- skb = skb2;
- net_info_ratelimited("dn_phase3_output: Increasing headroom\n");
- }
-
- data = skb_push(skb, sizeof(struct dn_short_packet) + 2);
- *((__le16 *)data) = cpu_to_le16(skb->len - 2);
- sp = (struct dn_short_packet *)(data + 2);
-
- sp->msgflg = DN_RT_PKT_SHORT|(cb->rt_flags&(DN_RT_F_RQR|DN_RT_F_RTS));
- sp->dstnode = cb->dst & cpu_to_le16(0x03ff);
- sp->srcnode = cb->src & cpu_to_le16(0x03ff);
- sp->forward = cb->hops & 0x3f;
-
- skb_reset_network_header(skb);
-
- return NF_HOOK(NFPROTO_DECNET, NF_DN_POST_ROUTING,
- &init_net, sk, skb, NULL, neigh->dev,
- dn_neigh_output_packet);
-}
-
-int dn_to_neigh_output(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
- struct dst_entry *dst = skb_dst(skb);
- struct dn_route *rt = (struct dn_route *) dst;
- struct neighbour *neigh = rt->n;
- struct dn_neigh *dn = container_of(neigh, struct dn_neigh, n);
- struct dn_dev *dn_db;
- bool use_long;
-
- rcu_read_lock();
- dn_db = rcu_dereference(neigh->dev->dn_ptr);
- if (dn_db == NULL) {
- rcu_read_unlock();
- return -EINVAL;
- }
- use_long = dn_db->use_long;
- rcu_read_unlock();
-
- if (dn->flags & DN_NDFLAG_P3)
- return dn_phase3_output(neigh, sk, skb);
- if (use_long)
- return dn_long_output(neigh, sk, skb);
- else
- return dn_short_output(neigh, sk, skb);
-}
-
-/*
- * Unfortunately, the neighbour code uses the device in its hash
- * function, so we don't get any advantage from it. This function
- * basically does a neigh_lookup(), but without comparing the device
- * field. This is required for the On-Ethernet cache
- */
-
-/*
- * Pointopoint link receives a hello message
- */
-void dn_neigh_pointopoint_hello(struct sk_buff *skb)
-{
- kfree_skb(skb);
-}
-
-/*
- * Ethernet router hello message received
- */
-int dn_neigh_router_hello(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
- struct rtnode_hello_message *msg = (struct rtnode_hello_message *)skb->data;
-
- struct neighbour *neigh;
- struct dn_neigh *dn;
- struct dn_dev *dn_db;
- __le16 src;
-
- src = dn_eth2dn(msg->id);
-
- neigh = __neigh_lookup(&dn_neigh_table, &src, skb->dev, 1);
-
- dn = container_of(neigh, struct dn_neigh, n);
-
- if (neigh) {
- write_lock(&neigh->lock);
-
- neigh->used = jiffies;
- dn_db = rcu_dereference(neigh->dev->dn_ptr);
-
- if (!(neigh->nud_state & NUD_PERMANENT)) {
- neigh->updated = jiffies;
-
- if (neigh->dev->type == ARPHRD_ETHER)
- memcpy(neigh->ha, ð_hdr(skb)->h_source, ETH_ALEN);
-
- dn->blksize = le16_to_cpu(msg->blksize);
- dn->priority = msg->priority;
-
- dn->flags &= ~DN_NDFLAG_P3;
-
- switch (msg->iinfo & DN_RT_INFO_TYPE) {
- case DN_RT_INFO_L1RT:
- dn->flags &=~DN_NDFLAG_R2;
- dn->flags |= DN_NDFLAG_R1;
- break;
- case DN_RT_INFO_L2RT:
- dn->flags |= DN_NDFLAG_R2;
- }
- }
-
- /* Only use routers in our area */
- if ((le16_to_cpu(src)>>10) == (le16_to_cpu((decnet_address))>>10)) {
- if (!dn_db->router) {
- dn_db->router = neigh_clone(neigh);
- } else {
- if (msg->priority > container_of(dn_db->router,
- struct dn_neigh, n)->priority)
- neigh_release(xchg(&dn_db->router, neigh_clone(neigh)));
- }
- }
- write_unlock(&neigh->lock);
- neigh_release(neigh);
- }
-
- kfree_skb(skb);
- return 0;
-}
-
-/*
- * Endnode hello message received
- */
-int dn_neigh_endnode_hello(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
- struct endnode_hello_message *msg = (struct endnode_hello_message *)skb->data;
- struct neighbour *neigh;
- struct dn_neigh *dn;
- __le16 src;
-
- src = dn_eth2dn(msg->id);
-
- neigh = __neigh_lookup(&dn_neigh_table, &src, skb->dev, 1);
-
- dn = container_of(neigh, struct dn_neigh, n);
-
- if (neigh) {
- write_lock(&neigh->lock);
-
- neigh->used = jiffies;
-
- if (!(neigh->nud_state & NUD_PERMANENT)) {
- neigh->updated = jiffies;
-
- if (neigh->dev->type == ARPHRD_ETHER)
- memcpy(neigh->ha, ð_hdr(skb)->h_source, ETH_ALEN);
- dn->flags &= ~(DN_NDFLAG_R1 | DN_NDFLAG_R2);
- dn->blksize = le16_to_cpu(msg->blksize);
- dn->priority = 0;
- }
-
- write_unlock(&neigh->lock);
- neigh_release(neigh);
- }
-
- kfree_skb(skb);
- return 0;
-}
-
-static char *dn_find_slot(char *base, int max, int priority)
-{
- int i;
- unsigned char *min = NULL;
-
- base += 6; /* skip first id */
-
- for(i = 0; i < max; i++) {
- if (!min || (*base < *min))
- min = base;
- base += 7; /* find next priority */
- }
-
- if (!min)
- return NULL;
-
- return (*min < priority) ? (min - 6) : NULL;
-}
-
-struct elist_cb_state {
- struct net_device *dev;
- unsigned char *ptr;
- unsigned char *rs;
- int t, n;
-};
-
-static void neigh_elist_cb(struct neighbour *neigh, void *_info)
-{
- struct elist_cb_state *s = _info;
- struct dn_neigh *dn;
-
- if (neigh->dev != s->dev)
- return;
-
- dn = container_of(neigh, struct dn_neigh, n);
- if (!(dn->flags & (DN_NDFLAG_R1|DN_NDFLAG_R2)))
- return;
-
- if (s->t == s->n)
- s->rs = dn_find_slot(s->ptr, s->n, dn->priority);
- else
- s->t++;
- if (s->rs == NULL)
- return;
-
- dn_dn2eth(s->rs, dn->addr);
- s->rs += 6;
- *(s->rs) = neigh->nud_state & NUD_CONNECTED ? 0x80 : 0x0;
- *(s->rs) |= dn->priority;
- s->rs++;
-}
-
-int dn_neigh_elist(struct net_device *dev, unsigned char *ptr, int n)
-{
- struct elist_cb_state state;
-
- state.dev = dev;
- state.t = 0;
- state.n = n;
- state.ptr = ptr;
- state.rs = ptr;
-
- neigh_for_each(&dn_neigh_table, neigh_elist_cb, &state);
-
- return state.t;
-}
-
-
-#ifdef CONFIG_PROC_FS
-
-static inline void dn_neigh_format_entry(struct seq_file *seq,
- struct neighbour *n)
-{
- struct dn_neigh *dn = container_of(n, struct dn_neigh, n);
- char buf[DN_ASCBUF_LEN];
-
- read_lock(&n->lock);
- seq_printf(seq, "%-7s %s%s%s %02x %02d %07ld %-8s\n",
- dn_addr2asc(le16_to_cpu(dn->addr), buf),
- (dn->flags&DN_NDFLAG_R1) ? "1" : "-",
- (dn->flags&DN_NDFLAG_R2) ? "2" : "-",
- (dn->flags&DN_NDFLAG_P3) ? "3" : "-",
- dn->n.nud_state,
- refcount_read(&dn->n.refcnt),
- dn->blksize,
- (dn->n.dev) ? dn->n.dev->name : "?");
- read_unlock(&n->lock);
-}
-
-static int dn_neigh_seq_show(struct seq_file *seq, void *v)
-{
- if (v == SEQ_START_TOKEN) {
- seq_puts(seq, "Addr Flags State Use Blksize Dev\n");
- } else {
- dn_neigh_format_entry(seq, v);
- }
-
- return 0;
-}
-
-static void *dn_neigh_seq_start(struct seq_file *seq, loff_t *pos)
-{
- return neigh_seq_start(seq, pos, &dn_neigh_table,
- NEIGH_SEQ_NEIGH_ONLY);
-}
-
-static const struct seq_operations dn_neigh_seq_ops = {
- .start = dn_neigh_seq_start,
- .next = neigh_seq_next,
- .stop = neigh_seq_stop,
- .show = dn_neigh_seq_show,
-};
-#endif
-
-void __init dn_neigh_init(void)
-{
- neigh_table_init(NEIGH_DN_TABLE, &dn_neigh_table);
- proc_create_net("decnet_neigh", 0444, init_net.proc_net,
- &dn_neigh_seq_ops, sizeof(struct neigh_seq_state));
-}
-
-void __exit dn_neigh_cleanup(void)
-{
- remove_proc_entry("decnet_neigh", init_net.proc_net);
- neigh_table_clear(NEIGH_DN_TABLE, &dn_neigh_table);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * DECnet An implementation of the DECnet protocol suite for the LINUX
- * operating system. DECnet is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * DECnet Network Services Protocol (Input)
- *
- * Author: Eduardo Marcelo Serrat <emserrat@geocities.com>
- *
- * Changes:
- *
- * Steve Whitehouse: Split into dn_nsp_in.c and dn_nsp_out.c from
- * original dn_nsp.c.
- * Steve Whitehouse: Updated to work with my new routing architecture.
- * Steve Whitehouse: Add changes from Eduardo Serrat's patches.
- * Steve Whitehouse: Put all ack handling code in a common routine.
- * Steve Whitehouse: Put other common bits into dn_nsp_rx()
- * Steve Whitehouse: More checks on skb->len to catch bogus packets
- * Fixed various race conditions and possible nasties.
- * Steve Whitehouse: Now handles returned conninit frames.
- * David S. Miller: New socket locking
- * Steve Whitehouse: Fixed lockup when socket filtering was enabled.
- * Paul Koning: Fix to push CC sockets into RUN when acks are
- * received.
- * Steve Whitehouse:
- * Patrick Caulfield: Checking conninits for correctness & sending of error
- * responses.
- * Steve Whitehouse: Added backlog congestion level return codes.
- * Patrick Caulfield:
- * Steve Whitehouse: Added flow control support (outbound)
- * Steve Whitehouse: Prepare for nonlinear skbs
- */
-
-/******************************************************************************
- (c) 1995-1998 E.M. Serrat emserrat@geocities.com
-
-*******************************************************************************/
-
-#include <linux/errno.h>
-#include <linux/filter.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/netdevice.h>
-#include <linux/inet.h>
-#include <linux/route.h>
-#include <linux/slab.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/termios.h>
-#include <linux/interrupt.h>
-#include <linux/proc_fs.h>
-#include <linux/stat.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/netfilter_decnet.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/dn.h>
-#include <net/dn_nsp.h>
-#include <net/dn_dev.h>
-#include <net/dn_route.h>
-
-extern int decnet_log_martians;
-
-static void dn_log_martian(struct sk_buff *skb, const char *msg)
-{
- if (decnet_log_martians) {
- char *devname = skb->dev ? skb->dev->name : "???";
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- net_info_ratelimited("DECnet: Martian packet (%s) dev=%s src=0x%04hx dst=0x%04hx srcport=0x%04hx dstport=0x%04hx\n",
- msg, devname,
- le16_to_cpu(cb->src),
- le16_to_cpu(cb->dst),
- le16_to_cpu(cb->src_port),
- le16_to_cpu(cb->dst_port));
- }
-}
-
-/*
- * For this function we've flipped the cross-subchannel bit
- * if the message is an otherdata or linkservice message. Thus
- * we can use it to work out what to update.
- */
-static void dn_ack(struct sock *sk, struct sk_buff *skb, unsigned short ack)
-{
- struct dn_scp *scp = DN_SK(sk);
- unsigned short type = ((ack >> 12) & 0x0003);
- int wakeup = 0;
-
- switch (type) {
- case 0: /* ACK - Data */
- if (dn_after(ack, scp->ackrcv_dat)) {
- scp->ackrcv_dat = ack & 0x0fff;
- wakeup |= dn_nsp_check_xmit_queue(sk, skb,
- &scp->data_xmit_queue,
- ack);
- }
- break;
- case 1: /* NAK - Data */
- break;
- case 2: /* ACK - OtherData */
- if (dn_after(ack, scp->ackrcv_oth)) {
- scp->ackrcv_oth = ack & 0x0fff;
- wakeup |= dn_nsp_check_xmit_queue(sk, skb,
- &scp->other_xmit_queue,
- ack);
- }
- break;
- case 3: /* NAK - OtherData */
- break;
- }
-
- if (wakeup && !sock_flag(sk, SOCK_DEAD))
- sk->sk_state_change(sk);
-}
-
-/*
- * This function is a universal ack processor.
- */
-static int dn_process_ack(struct sock *sk, struct sk_buff *skb, int oth)
-{
- __le16 *ptr = (__le16 *)skb->data;
- int len = 0;
- unsigned short ack;
-
- if (skb->len < 2)
- return len;
-
- if ((ack = le16_to_cpu(*ptr)) & 0x8000) {
- skb_pull(skb, 2);
- ptr++;
- len += 2;
- if ((ack & 0x4000) == 0) {
- if (oth)
- ack ^= 0x2000;
- dn_ack(sk, skb, ack);
- }
- }
-
- if (skb->len < 2)
- return len;
-
- if ((ack = le16_to_cpu(*ptr)) & 0x8000) {
- skb_pull(skb, 2);
- len += 2;
- if ((ack & 0x4000) == 0) {
- if (oth)
- ack ^= 0x2000;
- dn_ack(sk, skb, ack);
- }
- }
-
- return len;
-}
-
-
-/**
- * dn_check_idf - Check an image data field format is correct.
- * @pptr: Pointer to pointer to image data
- * @len: Pointer to length of image data
- * @max: The maximum allowed length of the data in the image data field
- * @follow_on: Check that this many bytes exist beyond the end of the image data
- *
- * Returns: 0 if ok, -1 on error
- */
-static inline int dn_check_idf(unsigned char **pptr, int *len, unsigned char max, unsigned char follow_on)
-{
- unsigned char *ptr = *pptr;
- unsigned char flen = *ptr++;
-
- (*len)--;
- if (flen > max)
- return -1;
- if ((flen + follow_on) > *len)
- return -1;
-
- *len -= flen;
- *pptr = ptr + flen;
- return 0;
-}
-
-/*
- * Table of reason codes to pass back to node which sent us a badly
- * formed message, plus text messages for the log. A zero entry in
- * the reason field means "don't reply" otherwise a disc init is sent with
- * the specified reason code.
- */
-static struct {
- unsigned short reason;
- const char *text;
-} ci_err_table[] = {
- { 0, "CI: Truncated message" },
- { NSP_REASON_ID, "CI: Destination username error" },
- { NSP_REASON_ID, "CI: Destination username type" },
- { NSP_REASON_US, "CI: Source username error" },
- { 0, "CI: Truncated at menuver" },
- { 0, "CI: Truncated before access or user data" },
- { NSP_REASON_IO, "CI: Access data format error" },
- { NSP_REASON_IO, "CI: User data format error" }
-};
-
-/*
- * This function uses a slightly different lookup method
- * to find its sockets, since it searches on object name/number
- * rather than port numbers. Various tests are done to ensure that
- * the incoming data is in the correct format before it is queued to
- * a socket.
- */
-static struct sock *dn_find_listener(struct sk_buff *skb, unsigned short *reason)
-{
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- struct nsp_conn_init_msg *msg = (struct nsp_conn_init_msg *)skb->data;
- struct sockaddr_dn dstaddr;
- struct sockaddr_dn srcaddr;
- unsigned char type = 0;
- int dstlen;
- int srclen;
- unsigned char *ptr;
- int len;
- int err = 0;
- unsigned char menuver;
-
- memset(&dstaddr, 0, sizeof(struct sockaddr_dn));
- memset(&srcaddr, 0, sizeof(struct sockaddr_dn));
-
- /*
- * 1. Decode & remove message header
- */
- cb->src_port = msg->srcaddr;
- cb->dst_port = msg->dstaddr;
- cb->services = msg->services;
- cb->info = msg->info;
- cb->segsize = le16_to_cpu(msg->segsize);
-
- if (!pskb_may_pull(skb, sizeof(*msg)))
- goto err_out;
-
- skb_pull(skb, sizeof(*msg));
-
- len = skb->len;
- ptr = skb->data;
-
- /*
- * 2. Check destination end username format
- */
- dstlen = dn_username2sockaddr(ptr, len, &dstaddr, &type);
- err++;
- if (dstlen < 0)
- goto err_out;
-
- err++;
- if (type > 1)
- goto err_out;
-
- len -= dstlen;
- ptr += dstlen;
-
- /*
- * 3. Check source end username format
- */
- srclen = dn_username2sockaddr(ptr, len, &srcaddr, &type);
- err++;
- if (srclen < 0)
- goto err_out;
-
- len -= srclen;
- ptr += srclen;
- err++;
- if (len < 1)
- goto err_out;
-
- menuver = *ptr;
- ptr++;
- len--;
-
- /*
- * 4. Check that optional data actually exists if menuver says it does
- */
- err++;
- if ((menuver & (DN_MENUVER_ACC | DN_MENUVER_USR)) && (len < 1))
- goto err_out;
-
- /*
- * 5. Check optional access data format
- */
- err++;
- if (menuver & DN_MENUVER_ACC) {
- if (dn_check_idf(&ptr, &len, 39, 1))
- goto err_out;
- if (dn_check_idf(&ptr, &len, 39, 1))
- goto err_out;
- if (dn_check_idf(&ptr, &len, 39, (menuver & DN_MENUVER_USR) ? 1 : 0))
- goto err_out;
- }
-
- /*
- * 6. Check optional user data format
- */
- err++;
- if (menuver & DN_MENUVER_USR) {
- if (dn_check_idf(&ptr, &len, 16, 0))
- goto err_out;
- }
-
- /*
- * 7. Look up socket based on destination end username
- */
- return dn_sklist_find_listener(&dstaddr);
-err_out:
- dn_log_martian(skb, ci_err_table[err].text);
- *reason = ci_err_table[err].reason;
- return NULL;
-}
-
-
-static void dn_nsp_conn_init(struct sock *sk, struct sk_buff *skb)
-{
- if (sk_acceptq_is_full(sk)) {
- kfree_skb(skb);
- return;
- }
-
- sk_acceptq_added(sk);
- skb_queue_tail(&sk->sk_receive_queue, skb);
- sk->sk_state_change(sk);
-}
-
-static void dn_nsp_conn_conf(struct sock *sk, struct sk_buff *skb)
-{
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- struct dn_scp *scp = DN_SK(sk);
- unsigned char *ptr;
-
- if (skb->len < 4)
- goto out;
-
- ptr = skb->data;
- cb->services = *ptr++;
- cb->info = *ptr++;
- cb->segsize = le16_to_cpu(*(__le16 *)ptr);
-
- if ((scp->state == DN_CI) || (scp->state == DN_CD)) {
- scp->persist = 0;
- scp->addrrem = cb->src_port;
- sk->sk_state = TCP_ESTABLISHED;
- scp->state = DN_RUN;
- scp->services_rem = cb->services;
- scp->info_rem = cb->info;
- scp->segsize_rem = cb->segsize;
-
- if ((scp->services_rem & NSP_FC_MASK) == NSP_FC_NONE)
- scp->max_window = decnet_no_fc_max_cwnd;
-
- if (skb->len > 0) {
- u16 dlen = *skb->data;
- if ((dlen <= 16) && (dlen <= skb->len)) {
- scp->conndata_in.opt_optl = cpu_to_le16(dlen);
- skb_copy_from_linear_data_offset(skb, 1,
- scp->conndata_in.opt_data, dlen);
- }
- }
- dn_nsp_send_link(sk, DN_NOCHANGE, 0);
- if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_state_change(sk);
- }
-
-out:
- kfree_skb(skb);
-}
-
-static void dn_nsp_conn_ack(struct sock *sk, struct sk_buff *skb)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- if (scp->state == DN_CI) {
- scp->state = DN_CD;
- scp->persist = 0;
- }
-
- kfree_skb(skb);
-}
-
-static void dn_nsp_disc_init(struct sock *sk, struct sk_buff *skb)
-{
- struct dn_scp *scp = DN_SK(sk);
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- unsigned short reason;
-
- if (skb->len < 2)
- goto out;
-
- reason = le16_to_cpu(*(__le16 *)skb->data);
- skb_pull(skb, 2);
-
- scp->discdata_in.opt_status = cpu_to_le16(reason);
- scp->discdata_in.opt_optl = 0;
- memset(scp->discdata_in.opt_data, 0, 16);
-
- if (skb->len > 0) {
- u16 dlen = *skb->data;
- if ((dlen <= 16) && (dlen <= skb->len)) {
- scp->discdata_in.opt_optl = cpu_to_le16(dlen);
- skb_copy_from_linear_data_offset(skb, 1, scp->discdata_in.opt_data, dlen);
- }
- }
-
- scp->addrrem = cb->src_port;
- sk->sk_state = TCP_CLOSE;
-
- switch (scp->state) {
- case DN_CI:
- case DN_CD:
- scp->state = DN_RJ;
- sk->sk_err = ECONNREFUSED;
- break;
- case DN_RUN:
- sk->sk_shutdown |= SHUTDOWN_MASK;
- scp->state = DN_DN;
- break;
- case DN_DI:
- scp->state = DN_DIC;
- break;
- }
-
- if (!sock_flag(sk, SOCK_DEAD)) {
- if (sk->sk_socket->state != SS_UNCONNECTED)
- sk->sk_socket->state = SS_DISCONNECTING;
- sk->sk_state_change(sk);
- }
-
- /*
- * It appears that its possible for remote machines to send disc
- * init messages with no port identifier if we are in the CI and
- * possibly also the CD state. Obviously we shouldn't reply with
- * a message if we don't know what the end point is.
- */
- if (scp->addrrem) {
- dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC, GFP_ATOMIC);
- }
- scp->persist_fxn = dn_destroy_timer;
- scp->persist = dn_nsp_persist(sk);
-
-out:
- kfree_skb(skb);
-}
-
-/*
- * disc_conf messages are also called no_resources or no_link
- * messages depending upon the "reason" field.
- */
-static void dn_nsp_disc_conf(struct sock *sk, struct sk_buff *skb)
-{
- struct dn_scp *scp = DN_SK(sk);
- unsigned short reason;
-
- if (skb->len != 2)
- goto out;
-
- reason = le16_to_cpu(*(__le16 *)skb->data);
-
- sk->sk_state = TCP_CLOSE;
-
- switch (scp->state) {
- case DN_CI:
- scp->state = DN_NR;
- break;
- case DN_DR:
- if (reason == NSP_REASON_DC)
- scp->state = DN_DRC;
- if (reason == NSP_REASON_NL)
- scp->state = DN_CN;
- break;
- case DN_DI:
- scp->state = DN_DIC;
- break;
- case DN_RUN:
- sk->sk_shutdown |= SHUTDOWN_MASK;
- fallthrough;
- case DN_CC:
- scp->state = DN_CN;
- }
-
- if (!sock_flag(sk, SOCK_DEAD)) {
- if (sk->sk_socket->state != SS_UNCONNECTED)
- sk->sk_socket->state = SS_DISCONNECTING;
- sk->sk_state_change(sk);
- }
-
- scp->persist_fxn = dn_destroy_timer;
- scp->persist = dn_nsp_persist(sk);
-
-out:
- kfree_skb(skb);
-}
-
-static void dn_nsp_linkservice(struct sock *sk, struct sk_buff *skb)
-{
- struct dn_scp *scp = DN_SK(sk);
- unsigned short segnum;
- unsigned char lsflags;
- signed char fcval;
- int wake_up = 0;
- char *ptr = skb->data;
- unsigned char fctype = scp->services_rem & NSP_FC_MASK;
-
- if (skb->len != 4)
- goto out;
-
- segnum = le16_to_cpu(*(__le16 *)ptr);
- ptr += 2;
- lsflags = *(unsigned char *)ptr++;
- fcval = *ptr;
-
- /*
- * Here we ignore erroneous packets which should really
- * should cause a connection abort. It is not critical
- * for now though.
- */
- if (lsflags & 0xf8)
- goto out;
-
- if (seq_next(scp->numoth_rcv, segnum)) {
- seq_add(&scp->numoth_rcv, 1);
- switch(lsflags & 0x04) { /* FCVAL INT */
- case 0x00: /* Normal Request */
- switch(lsflags & 0x03) { /* FCVAL MOD */
- case 0x00: /* Request count */
- if (fcval < 0) {
- unsigned char p_fcval = -fcval;
- if ((scp->flowrem_dat > p_fcval) &&
- (fctype == NSP_FC_SCMC)) {
- scp->flowrem_dat -= p_fcval;
- }
- } else if (fcval > 0) {
- scp->flowrem_dat += fcval;
- wake_up = 1;
- }
- break;
- case 0x01: /* Stop outgoing data */
- scp->flowrem_sw = DN_DONTSEND;
- break;
- case 0x02: /* Ok to start again */
- scp->flowrem_sw = DN_SEND;
- dn_nsp_output(sk);
- wake_up = 1;
- }
- break;
- case 0x04: /* Interrupt Request */
- if (fcval > 0) {
- scp->flowrem_oth += fcval;
- wake_up = 1;
- }
- break;
- }
- if (wake_up && !sock_flag(sk, SOCK_DEAD))
- sk->sk_state_change(sk);
- }
-
- dn_nsp_send_oth_ack(sk);
-
-out:
- kfree_skb(skb);
-}
-
-/*
- * Copy of sock_queue_rcv_skb (from sock.h) without
- * bh_lock_sock() (its already held when this is called) which
- * also allows data and other data to be queued to a socket.
- */
-static __inline__ int dn_queue_skb(struct sock *sk, struct sk_buff *skb, int sig, struct sk_buff_head *queue)
-{
- int err;
-
- /* Cast skb->rcvbuf to unsigned... It's pointless, but reduces
- number of warnings when compiling with -W --ANK
- */
- if (atomic_read(&sk->sk_rmem_alloc) + skb->truesize >=
- (unsigned int)sk->sk_rcvbuf) {
- err = -ENOMEM;
- goto out;
- }
-
- err = sk_filter(sk, skb);
- if (err)
- goto out;
-
- skb_set_owner_r(skb, sk);
- skb_queue_tail(queue, skb);
-
- if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_data_ready(sk);
-out:
- return err;
-}
-
-static void dn_nsp_otherdata(struct sock *sk, struct sk_buff *skb)
-{
- struct dn_scp *scp = DN_SK(sk);
- unsigned short segnum;
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- int queued = 0;
-
- if (skb->len < 2)
- goto out;
-
- cb->segnum = segnum = le16_to_cpu(*(__le16 *)skb->data);
- skb_pull(skb, 2);
-
- if (seq_next(scp->numoth_rcv, segnum)) {
-
- if (dn_queue_skb(sk, skb, SIGURG, &scp->other_receive_queue) == 0) {
- seq_add(&scp->numoth_rcv, 1);
- scp->other_report = 0;
- queued = 1;
- }
- }
-
- dn_nsp_send_oth_ack(sk);
-out:
- if (!queued)
- kfree_skb(skb);
-}
-
-static void dn_nsp_data(struct sock *sk, struct sk_buff *skb)
-{
- int queued = 0;
- unsigned short segnum;
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- struct dn_scp *scp = DN_SK(sk);
-
- if (skb->len < 2)
- goto out;
-
- cb->segnum = segnum = le16_to_cpu(*(__le16 *)skb->data);
- skb_pull(skb, 2);
-
- if (seq_next(scp->numdat_rcv, segnum)) {
- if (dn_queue_skb(sk, skb, SIGIO, &sk->sk_receive_queue) == 0) {
- seq_add(&scp->numdat_rcv, 1);
- queued = 1;
- }
-
- if ((scp->flowloc_sw == DN_SEND) && dn_congested(sk)) {
- scp->flowloc_sw = DN_DONTSEND;
- dn_nsp_send_link(sk, DN_DONTSEND, 0);
- }
- }
-
- dn_nsp_send_data_ack(sk);
-out:
- if (!queued)
- kfree_skb(skb);
-}
-
-/*
- * If one of our conninit messages is returned, this function
- * deals with it. It puts the socket into the NO_COMMUNICATION
- * state.
- */
-static void dn_returned_conn_init(struct sock *sk, struct sk_buff *skb)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- if (scp->state == DN_CI) {
- scp->state = DN_NC;
- sk->sk_state = TCP_CLOSE;
- if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_state_change(sk);
- }
-
- kfree_skb(skb);
-}
-
-static int dn_nsp_no_socket(struct sk_buff *skb, unsigned short reason)
-{
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- int ret = NET_RX_DROP;
-
- /* Must not reply to returned packets */
- if (cb->rt_flags & DN_RT_F_RTS)
- goto out;
-
- if ((reason != NSP_REASON_OK) && ((cb->nsp_flags & 0x0c) == 0x08)) {
- switch (cb->nsp_flags & 0x70) {
- case 0x10:
- case 0x60: /* (Retransmitted) Connect Init */
- dn_nsp_return_disc(skb, NSP_DISCINIT, reason);
- ret = NET_RX_SUCCESS;
- break;
- case 0x20: /* Connect Confirm */
- dn_nsp_return_disc(skb, NSP_DISCCONF, reason);
- ret = NET_RX_SUCCESS;
- break;
- }
- }
-
-out:
- kfree_skb(skb);
- return ret;
-}
-
-static int dn_nsp_rx_packet(struct net *net, struct sock *sk2,
- struct sk_buff *skb)
-{
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- struct sock *sk = NULL;
- unsigned char *ptr = (unsigned char *)skb->data;
- unsigned short reason = NSP_REASON_NL;
-
- if (!pskb_may_pull(skb, 2))
- goto free_out;
-
- skb_reset_transport_header(skb);
- cb->nsp_flags = *ptr++;
-
- if (decnet_debug_level & 2)
- printk(KERN_DEBUG "dn_nsp_rx: Message type 0x%02x\n", (int)cb->nsp_flags);
-
- if (cb->nsp_flags & 0x83)
- goto free_out;
-
- /*
- * Filter out conninits and useless packet types
- */
- if ((cb->nsp_flags & 0x0c) == 0x08) {
- switch (cb->nsp_flags & 0x70) {
- case 0x00: /* NOP */
- case 0x70: /* Reserved */
- case 0x50: /* Reserved, Phase II node init */
- goto free_out;
- case 0x10:
- case 0x60:
- if (unlikely(cb->rt_flags & DN_RT_F_RTS))
- goto free_out;
- sk = dn_find_listener(skb, &reason);
- goto got_it;
- }
- }
-
- if (!pskb_may_pull(skb, 3))
- goto free_out;
-
- /*
- * Grab the destination address.
- */
- cb->dst_port = *(__le16 *)ptr;
- cb->src_port = 0;
- ptr += 2;
-
- /*
- * If not a connack, grab the source address too.
- */
- if (pskb_may_pull(skb, 5)) {
- cb->src_port = *(__le16 *)ptr;
- ptr += 2;
- skb_pull(skb, 5);
- }
-
- /*
- * Returned packets...
- * Swap src & dst and look up in the normal way.
- */
- if (unlikely(cb->rt_flags & DN_RT_F_RTS)) {
- swap(cb->dst_port, cb->src_port);
- swap(cb->dst, cb->src);
- }
-
- /*
- * Find the socket to which this skb is destined.
- */
- sk = dn_find_by_skb(skb);
-got_it:
- if (sk != NULL) {
- struct dn_scp *scp = DN_SK(sk);
-
- /* Reset backoff */
- scp->nsp_rxtshift = 0;
-
- /*
- * We linearize everything except data segments here.
- */
- if (cb->nsp_flags & ~0x60) {
- if (unlikely(skb_linearize(skb)))
- goto free_out;
- }
-
- return sk_receive_skb(sk, skb, 0);
- }
-
- return dn_nsp_no_socket(skb, reason);
-
-free_out:
- kfree_skb(skb);
- return NET_RX_DROP;
-}
-
-int dn_nsp_rx(struct sk_buff *skb)
-{
- return NF_HOOK(NFPROTO_DECNET, NF_DN_LOCAL_IN,
- &init_net, NULL, skb, skb->dev, NULL,
- dn_nsp_rx_packet);
-}
-
-/*
- * This is the main receive routine for sockets. It is called
- * from the above when the socket is not busy, and also from
- * sock_release() when there is a backlog queued up.
- */
-int dn_nsp_backlog_rcv(struct sock *sk, struct sk_buff *skb)
-{
- struct dn_scp *scp = DN_SK(sk);
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
-
- if (cb->rt_flags & DN_RT_F_RTS) {
- if (cb->nsp_flags == 0x18 || cb->nsp_flags == 0x68)
- dn_returned_conn_init(sk, skb);
- else
- kfree_skb(skb);
- return NET_RX_SUCCESS;
- }
-
- /*
- * Control packet.
- */
- if ((cb->nsp_flags & 0x0c) == 0x08) {
- switch (cb->nsp_flags & 0x70) {
- case 0x10:
- case 0x60:
- dn_nsp_conn_init(sk, skb);
- break;
- case 0x20:
- dn_nsp_conn_conf(sk, skb);
- break;
- case 0x30:
- dn_nsp_disc_init(sk, skb);
- break;
- case 0x40:
- dn_nsp_disc_conf(sk, skb);
- break;
- }
-
- } else if (cb->nsp_flags == 0x24) {
- /*
- * Special for connacks, 'cos they don't have
- * ack data or ack otherdata info.
- */
- dn_nsp_conn_ack(sk, skb);
- } else {
- int other = 1;
-
- /* both data and ack frames can kick a CC socket into RUN */
- if ((scp->state == DN_CC) && !sock_flag(sk, SOCK_DEAD)) {
- scp->state = DN_RUN;
- sk->sk_state = TCP_ESTABLISHED;
- sk->sk_state_change(sk);
- }
-
- if ((cb->nsp_flags & 0x1c) == 0)
- other = 0;
- if (cb->nsp_flags == 0x04)
- other = 0;
-
- /*
- * Read out ack data here, this applies equally
- * to data, other data, link service and both
- * ack data and ack otherdata.
- */
- dn_process_ack(sk, skb, other);
-
- /*
- * If we've some sort of data here then call a
- * suitable routine for dealing with it, otherwise
- * the packet is an ack and can be discarded.
- */
- if ((cb->nsp_flags & 0x0c) == 0) {
-
- if (scp->state != DN_RUN)
- goto free_out;
-
- switch (cb->nsp_flags) {
- case 0x10: /* LS */
- dn_nsp_linkservice(sk, skb);
- break;
- case 0x30: /* OD */
- dn_nsp_otherdata(sk, skb);
- break;
- default:
- dn_nsp_data(sk, skb);
- }
-
- } else { /* Ack, chuck it out here */
-free_out:
- kfree_skb(skb);
- }
- }
-
- return NET_RX_SUCCESS;
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * DECnet An implementation of the DECnet protocol suite for the LINUX
- * operating system. DECnet is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * DECnet Network Services Protocol (Output)
- *
- * Author: Eduardo Marcelo Serrat <emserrat@geocities.com>
- *
- * Changes:
- *
- * Steve Whitehouse: Split into dn_nsp_in.c and dn_nsp_out.c from
- * original dn_nsp.c.
- * Steve Whitehouse: Updated to work with my new routing architecture.
- * Steve Whitehouse: Added changes from Eduardo Serrat's patches.
- * Steve Whitehouse: Now conninits have the "return" bit set.
- * Steve Whitehouse: Fixes to check alloc'd skbs are non NULL!
- * Moved output state machine into one function
- * Steve Whitehouse: New output state machine
- * Paul Koning: Connect Confirm message fix.
- * Eduardo Serrat: Fix to stop dn_nsp_do_disc() sending malformed packets.
- * Steve Whitehouse: dn_nsp_output() and friends needed a spring clean
- * Steve Whitehouse: Moved dn_nsp_send() in here from route.h
- */
-
-/******************************************************************************
- (c) 1995-1998 E.M. Serrat emserrat@geocities.com
-
-*******************************************************************************/
-
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/netdevice.h>
-#include <linux/inet.h>
-#include <linux/route.h>
-#include <linux/slab.h>
-#include <net/sock.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/termios.h>
-#include <linux/interrupt.h>
-#include <linux/proc_fs.h>
-#include <linux/stat.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/if_packet.h>
-#include <linux/jiffies.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/flow.h>
-#include <net/dn.h>
-#include <net/dn_nsp.h>
-#include <net/dn_dev.h>
-#include <net/dn_route.h>
-
-
-static int nsp_backoff[NSP_MAXRXTSHIFT + 1] = { 1, 2, 4, 8, 16, 32, 64, 64, 64, 64, 64, 64, 64 };
-
-static void dn_nsp_send(struct sk_buff *skb)
-{
- struct sock *sk = skb->sk;
- struct dn_scp *scp = DN_SK(sk);
- struct dst_entry *dst;
- struct flowidn fld;
-
- skb_reset_transport_header(skb);
- scp->stamp = jiffies;
-
- dst = sk_dst_check(sk, 0);
- if (dst) {
-try_again:
- skb_dst_set(skb, dst);
- dst_output(&init_net, skb->sk, skb);
- return;
- }
-
- memset(&fld, 0, sizeof(fld));
- fld.flowidn_oif = sk->sk_bound_dev_if;
- fld.saddr = dn_saddr2dn(&scp->addr);
- fld.daddr = dn_saddr2dn(&scp->peer);
- dn_sk_ports_copy(&fld, scp);
- fld.flowidn_proto = DNPROTO_NSP;
- if (dn_route_output_sock(&sk->sk_dst_cache, &fld, sk, 0) == 0) {
- dst = sk_dst_get(sk);
- sk->sk_route_caps = dst->dev->features;
- goto try_again;
- }
-
- sk->sk_err = EHOSTUNREACH;
- if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_state_change(sk);
-}
-
-
-/*
- * If sk == NULL, then we assume that we are supposed to be making
- * a routing layer skb. If sk != NULL, then we are supposed to be
- * creating an skb for the NSP layer.
- *
- * The eventual aim is for each socket to have a cached header size
- * for its outgoing packets, and to set hdr from this when sk != NULL.
- */
-struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri)
-{
- struct sk_buff *skb;
- int hdr = 64;
-
- if ((skb = alloc_skb(size + hdr, pri)) == NULL)
- return NULL;
-
- skb->protocol = htons(ETH_P_DNA_RT);
- skb->pkt_type = PACKET_OUTGOING;
-
- if (sk)
- skb_set_owner_w(skb, sk);
-
- skb_reserve(skb, hdr);
-
- return skb;
-}
-
-/*
- * Calculate persist timer based upon the smoothed round
- * trip time and the variance. Backoff according to the
- * nsp_backoff[] array.
- */
-unsigned long dn_nsp_persist(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- unsigned long t = ((scp->nsp_srtt >> 2) + scp->nsp_rttvar) >> 1;
-
- t *= nsp_backoff[scp->nsp_rxtshift];
-
- if (t < HZ) t = HZ;
- if (t > (600*HZ)) t = (600*HZ);
-
- if (scp->nsp_rxtshift < NSP_MAXRXTSHIFT)
- scp->nsp_rxtshift++;
-
- /* printk(KERN_DEBUG "rxtshift %lu, t=%lu\n", scp->nsp_rxtshift, t); */
-
- return t;
-}
-
-/*
- * This is called each time we get an estimate for the rtt
- * on the link.
- */
-static void dn_nsp_rtt(struct sock *sk, long rtt)
-{
- struct dn_scp *scp = DN_SK(sk);
- long srtt = (long)scp->nsp_srtt;
- long rttvar = (long)scp->nsp_rttvar;
- long delta;
-
- /*
- * If the jiffies clock flips over in the middle of timestamp
- * gathering this value might turn out negative, so we make sure
- * that is it always positive here.
- */
- if (rtt < 0)
- rtt = -rtt;
- /*
- * Add new rtt to smoothed average
- */
- delta = ((rtt << 3) - srtt);
- srtt += (delta >> 3);
- if (srtt >= 1)
- scp->nsp_srtt = (unsigned long)srtt;
- else
- scp->nsp_srtt = 1;
-
- /*
- * Add new rtt variance to smoothed varience
- */
- delta >>= 1;
- rttvar += ((((delta>0)?(delta):(-delta)) - rttvar) >> 2);
- if (rttvar >= 1)
- scp->nsp_rttvar = (unsigned long)rttvar;
- else
- scp->nsp_rttvar = 1;
-
- /* printk(KERN_DEBUG "srtt=%lu rttvar=%lu\n", scp->nsp_srtt, scp->nsp_rttvar); */
-}
-
-/**
- * dn_nsp_clone_and_send - Send a data packet by cloning it
- * @skb: The packet to clone and transmit
- * @gfp: memory allocation flag
- *
- * Clone a queued data or other data packet and transmit it.
- *
- * Returns: The number of times the packet has been sent previously
- */
-static inline unsigned int dn_nsp_clone_and_send(struct sk_buff *skb,
- gfp_t gfp)
-{
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- struct sk_buff *skb2;
- int ret = 0;
-
- if ((skb2 = skb_clone(skb, gfp)) != NULL) {
- ret = cb->xmit_count;
- cb->xmit_count++;
- cb->stamp = jiffies;
- skb2->sk = skb->sk;
- dn_nsp_send(skb2);
- }
-
- return ret;
-}
-
-/**
- * dn_nsp_output - Try and send something from socket queues
- * @sk: The socket whose queues are to be investigated
- *
- * Try and send the packet on the end of the data and other data queues.
- * Other data gets priority over data, and if we retransmit a packet we
- * reduce the window by dividing it in two.
- *
- */
-void dn_nsp_output(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
- struct sk_buff *skb;
- unsigned int reduce_win = 0;
-
- /*
- * First we check for otherdata/linkservice messages
- */
- if ((skb = skb_peek(&scp->other_xmit_queue)) != NULL)
- reduce_win = dn_nsp_clone_and_send(skb, GFP_ATOMIC);
-
- /*
- * If we may not send any data, we don't.
- * If we are still trying to get some other data down the
- * channel, we don't try and send any data.
- */
- if (reduce_win || (scp->flowrem_sw != DN_SEND))
- goto recalc_window;
-
- if ((skb = skb_peek(&scp->data_xmit_queue)) != NULL)
- reduce_win = dn_nsp_clone_and_send(skb, GFP_ATOMIC);
-
- /*
- * If we've sent any frame more than once, we cut the
- * send window size in half. There is always a minimum
- * window size of one available.
- */
-recalc_window:
- if (reduce_win) {
- scp->snd_window >>= 1;
- if (scp->snd_window < NSP_MIN_WINDOW)
- scp->snd_window = NSP_MIN_WINDOW;
- }
-}
-
-int dn_nsp_xmit_timeout(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- dn_nsp_output(sk);
-
- if (!skb_queue_empty(&scp->data_xmit_queue) ||
- !skb_queue_empty(&scp->other_xmit_queue))
- scp->persist = dn_nsp_persist(sk);
-
- return 0;
-}
-
-static inline __le16 *dn_mk_common_header(struct dn_scp *scp, struct sk_buff *skb, unsigned char msgflag, int len)
-{
- unsigned char *ptr = skb_push(skb, len);
-
- BUG_ON(len < 5);
-
- *ptr++ = msgflag;
- *((__le16 *)ptr) = scp->addrrem;
- ptr += 2;
- *((__le16 *)ptr) = scp->addrloc;
- ptr += 2;
- return (__le16 __force *)ptr;
-}
-
-static __le16 *dn_mk_ack_header(struct sock *sk, struct sk_buff *skb, unsigned char msgflag, int hlen, int other)
-{
- struct dn_scp *scp = DN_SK(sk);
- unsigned short acknum = scp->numdat_rcv & 0x0FFF;
- unsigned short ackcrs = scp->numoth_rcv & 0x0FFF;
- __le16 *ptr;
-
- BUG_ON(hlen < 9);
-
- scp->ackxmt_dat = acknum;
- scp->ackxmt_oth = ackcrs;
- acknum |= 0x8000;
- ackcrs |= 0x8000;
-
- /* If this is an "other data/ack" message, swap acknum and ackcrs */
- if (other)
- swap(acknum, ackcrs);
-
- /* Set "cross subchannel" bit in ackcrs */
- ackcrs |= 0x2000;
-
- ptr = dn_mk_common_header(scp, skb, msgflag, hlen);
-
- *ptr++ = cpu_to_le16(acknum);
- *ptr++ = cpu_to_le16(ackcrs);
-
- return ptr;
-}
-
-static __le16 *dn_nsp_mk_data_header(struct sock *sk, struct sk_buff *skb, int oth)
-{
- struct dn_scp *scp = DN_SK(sk);
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- __le16 *ptr = dn_mk_ack_header(sk, skb, cb->nsp_flags, 11, oth);
-
- if (unlikely(oth)) {
- cb->segnum = scp->numoth;
- seq_add(&scp->numoth, 1);
- } else {
- cb->segnum = scp->numdat;
- seq_add(&scp->numdat, 1);
- }
- *(ptr++) = cpu_to_le16(cb->segnum);
-
- return ptr;
-}
-
-void dn_nsp_queue_xmit(struct sock *sk, struct sk_buff *skb,
- gfp_t gfp, int oth)
-{
- struct dn_scp *scp = DN_SK(sk);
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- unsigned long t = ((scp->nsp_srtt >> 2) + scp->nsp_rttvar) >> 1;
-
- cb->xmit_count = 0;
- dn_nsp_mk_data_header(sk, skb, oth);
-
- /*
- * Slow start: If we have been idle for more than
- * one RTT, then reset window to min size.
- */
- if (time_is_before_jiffies(scp->stamp + t))
- scp->snd_window = NSP_MIN_WINDOW;
-
- if (oth)
- skb_queue_tail(&scp->other_xmit_queue, skb);
- else
- skb_queue_tail(&scp->data_xmit_queue, skb);
-
- if (scp->flowrem_sw != DN_SEND)
- return;
-
- dn_nsp_clone_and_send(skb, gfp);
-}
-
-
-int dn_nsp_check_xmit_queue(struct sock *sk, struct sk_buff *skb, struct sk_buff_head *q, unsigned short acknum)
-{
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- struct dn_scp *scp = DN_SK(sk);
- struct sk_buff *skb2, *n, *ack = NULL;
- int wakeup = 0;
- int try_retrans = 0;
- unsigned long reftime = cb->stamp;
- unsigned long pkttime;
- unsigned short xmit_count;
- unsigned short segnum;
-
- skb_queue_walk_safe(q, skb2, n) {
- struct dn_skb_cb *cb2 = DN_SKB_CB(skb2);
-
- if (dn_before_or_equal(cb2->segnum, acknum))
- ack = skb2;
-
- /* printk(KERN_DEBUG "ack: %s %04x %04x\n", ack ? "ACK" : "SKIP", (int)cb2->segnum, (int)acknum); */
-
- if (ack == NULL)
- continue;
-
- /* printk(KERN_DEBUG "check_xmit_queue: %04x, %d\n", acknum, cb2->xmit_count); */
-
- /* Does _last_ packet acked have xmit_count > 1 */
- try_retrans = 0;
- /* Remember to wake up the sending process */
- wakeup = 1;
- /* Keep various statistics */
- pkttime = cb2->stamp;
- xmit_count = cb2->xmit_count;
- segnum = cb2->segnum;
- /* Remove and drop ack'ed packet */
- skb_unlink(ack, q);
- kfree_skb(ack);
- ack = NULL;
-
- /*
- * We don't expect to see acknowledgements for packets we
- * haven't sent yet.
- */
- WARN_ON(xmit_count == 0);
-
- /*
- * If the packet has only been sent once, we can use it
- * to calculate the RTT and also open the window a little
- * further.
- */
- if (xmit_count == 1) {
- if (dn_equal(segnum, acknum))
- dn_nsp_rtt(sk, (long)(pkttime - reftime));
-
- if (scp->snd_window < scp->max_window)
- scp->snd_window++;
- }
-
- /*
- * Packet has been sent more than once. If this is the last
- * packet to be acknowledged then we want to send the next
- * packet in the send queue again (assumes the remote host does
- * go-back-N error control).
- */
- if (xmit_count > 1)
- try_retrans = 1;
- }
-
- if (try_retrans)
- dn_nsp_output(sk);
-
- return wakeup;
-}
-
-void dn_nsp_send_data_ack(struct sock *sk)
-{
- struct sk_buff *skb = NULL;
-
- if ((skb = dn_alloc_skb(sk, 9, GFP_ATOMIC)) == NULL)
- return;
-
- skb_reserve(skb, 9);
- dn_mk_ack_header(sk, skb, 0x04, 9, 0);
- dn_nsp_send(skb);
-}
-
-void dn_nsp_send_oth_ack(struct sock *sk)
-{
- struct sk_buff *skb = NULL;
-
- if ((skb = dn_alloc_skb(sk, 9, GFP_ATOMIC)) == NULL)
- return;
-
- skb_reserve(skb, 9);
- dn_mk_ack_header(sk, skb, 0x14, 9, 1);
- dn_nsp_send(skb);
-}
-
-
-void dn_send_conn_ack (struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
- struct sk_buff *skb = NULL;
- struct nsp_conn_ack_msg *msg;
-
- if ((skb = dn_alloc_skb(sk, 3, sk->sk_allocation)) == NULL)
- return;
-
- msg = skb_put(skb, 3);
- msg->msgflg = 0x24;
- msg->dstaddr = scp->addrrem;
-
- dn_nsp_send(skb);
-}
-
-static int dn_nsp_retrans_conn_conf(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- if (scp->state == DN_CC)
- dn_send_conn_conf(sk, GFP_ATOMIC);
-
- return 0;
-}
-
-void dn_send_conn_conf(struct sock *sk, gfp_t gfp)
-{
- struct dn_scp *scp = DN_SK(sk);
- struct sk_buff *skb = NULL;
- struct nsp_conn_init_msg *msg;
- __u8 len = (__u8)le16_to_cpu(scp->conndata_out.opt_optl);
-
- if ((skb = dn_alloc_skb(sk, 50 + len, gfp)) == NULL)
- return;
-
- msg = skb_put(skb, sizeof(*msg));
- msg->msgflg = 0x28;
- msg->dstaddr = scp->addrrem;
- msg->srcaddr = scp->addrloc;
- msg->services = scp->services_loc;
- msg->info = scp->info_loc;
- msg->segsize = cpu_to_le16(scp->segsize_loc);
-
- skb_put_u8(skb, len);
-
- if (len > 0)
- skb_put_data(skb, scp->conndata_out.opt_data, len);
-
-
- dn_nsp_send(skb);
-
- scp->persist = dn_nsp_persist(sk);
- scp->persist_fxn = dn_nsp_retrans_conn_conf;
-}
-
-
-static __inline__ void dn_nsp_do_disc(struct sock *sk, unsigned char msgflg,
- unsigned short reason, gfp_t gfp,
- struct dst_entry *dst,
- int ddl, unsigned char *dd, __le16 rem, __le16 loc)
-{
- struct sk_buff *skb = NULL;
- int size = 7 + ddl + ((msgflg == NSP_DISCINIT) ? 1 : 0);
- unsigned char *msg;
-
- if ((dst == NULL) || (rem == 0)) {
- net_dbg_ratelimited("DECnet: dn_nsp_do_disc: BUG! Please report this to SteveW@ACM.org rem=%u dst=%p\n",
- le16_to_cpu(rem), dst);
- return;
- }
-
- if ((skb = dn_alloc_skb(sk, size, gfp)) == NULL)
- return;
-
- msg = skb_put(skb, size);
- *msg++ = msgflg;
- *(__le16 *)msg = rem;
- msg += 2;
- *(__le16 *)msg = loc;
- msg += 2;
- *(__le16 *)msg = cpu_to_le16(reason);
- msg += 2;
- if (msgflg == NSP_DISCINIT)
- *msg++ = ddl;
-
- if (ddl) {
- memcpy(msg, dd, ddl);
- }
-
- /*
- * This doesn't go via the dn_nsp_send() function since we need
- * to be able to send disc packets out which have no socket
- * associations.
- */
- skb_dst_set(skb, dst_clone(dst));
- dst_output(&init_net, skb->sk, skb);
-}
-
-
-void dn_nsp_send_disc(struct sock *sk, unsigned char msgflg,
- unsigned short reason, gfp_t gfp)
-{
- struct dn_scp *scp = DN_SK(sk);
- int ddl = 0;
-
- if (msgflg == NSP_DISCINIT)
- ddl = le16_to_cpu(scp->discdata_out.opt_optl);
-
- if (reason == 0)
- reason = le16_to_cpu(scp->discdata_out.opt_status);
-
- dn_nsp_do_disc(sk, msgflg, reason, gfp, __sk_dst_get(sk), ddl,
- scp->discdata_out.opt_data, scp->addrrem, scp->addrloc);
-}
-
-
-void dn_nsp_return_disc(struct sk_buff *skb, unsigned char msgflg,
- unsigned short reason)
-{
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- int ddl = 0;
- gfp_t gfp = GFP_ATOMIC;
-
- dn_nsp_do_disc(NULL, msgflg, reason, gfp, skb_dst(skb), ddl,
- NULL, cb->src_port, cb->dst_port);
-}
-
-
-void dn_nsp_send_link(struct sock *sk, unsigned char lsflags, char fcval)
-{
- struct dn_scp *scp = DN_SK(sk);
- struct sk_buff *skb;
- unsigned char *ptr;
- gfp_t gfp = GFP_ATOMIC;
-
- if ((skb = dn_alloc_skb(sk, DN_MAX_NSP_DATA_HEADER + 2, gfp)) == NULL)
- return;
-
- skb_reserve(skb, DN_MAX_NSP_DATA_HEADER);
- ptr = skb_put(skb, 2);
- DN_SKB_CB(skb)->nsp_flags = 0x10;
- *ptr++ = lsflags;
- *ptr = fcval;
-
- dn_nsp_queue_xmit(sk, skb, gfp, 1);
-
- scp->persist = dn_nsp_persist(sk);
- scp->persist_fxn = dn_nsp_xmit_timeout;
-}
-
-static int dn_nsp_retrans_conninit(struct sock *sk)
-{
- struct dn_scp *scp = DN_SK(sk);
-
- if (scp->state == DN_CI)
- dn_nsp_send_conninit(sk, NSP_RCI);
-
- return 0;
-}
-
-void dn_nsp_send_conninit(struct sock *sk, unsigned char msgflg)
-{
- struct dn_scp *scp = DN_SK(sk);
- struct nsp_conn_init_msg *msg;
- unsigned char aux;
- unsigned char menuver;
- struct dn_skb_cb *cb;
- unsigned char type = 1;
- gfp_t allocation = (msgflg == NSP_CI) ? sk->sk_allocation : GFP_ATOMIC;
- struct sk_buff *skb = dn_alloc_skb(sk, 200, allocation);
-
- if (!skb)
- return;
-
- cb = DN_SKB_CB(skb);
- msg = skb_put(skb, sizeof(*msg));
-
- msg->msgflg = msgflg;
- msg->dstaddr = 0x0000; /* Remote Node will assign it*/
-
- msg->srcaddr = scp->addrloc;
- msg->services = scp->services_loc; /* Requested flow control */
- msg->info = scp->info_loc; /* Version Number */
- msg->segsize = cpu_to_le16(scp->segsize_loc); /* Max segment size */
-
- if (scp->peer.sdn_objnum)
- type = 0;
-
- skb_put(skb, dn_sockaddr2username(&scp->peer,
- skb_tail_pointer(skb), type));
- skb_put(skb, dn_sockaddr2username(&scp->addr,
- skb_tail_pointer(skb), 2));
-
- menuver = DN_MENUVER_ACC | DN_MENUVER_USR;
- if (scp->peer.sdn_flags & SDF_PROXY)
- menuver |= DN_MENUVER_PRX;
- if (scp->peer.sdn_flags & SDF_UICPROXY)
- menuver |= DN_MENUVER_UIC;
-
- skb_put_u8(skb, menuver); /* Menu Version */
-
- aux = scp->accessdata.acc_userl;
- skb_put_u8(skb, aux);
- if (aux > 0)
- skb_put_data(skb, scp->accessdata.acc_user, aux);
-
- aux = scp->accessdata.acc_passl;
- skb_put_u8(skb, aux);
- if (aux > 0)
- skb_put_data(skb, scp->accessdata.acc_pass, aux);
-
- aux = scp->accessdata.acc_accl;
- skb_put_u8(skb, aux);
- if (aux > 0)
- skb_put_data(skb, scp->accessdata.acc_acc, aux);
-
- aux = (__u8)le16_to_cpu(scp->conndata_out.opt_optl);
- skb_put_u8(skb, aux);
- if (aux > 0)
- skb_put_data(skb, scp->conndata_out.opt_data, aux);
-
- scp->persist = dn_nsp_persist(sk);
- scp->persist_fxn = dn_nsp_retrans_conninit;
-
- cb->rt_flags = DN_RT_F_RQR;
-
- dn_nsp_send(skb);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * DECnet An implementation of the DECnet protocol suite for the LINUX
- * operating system. DECnet is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * DECnet Routing Functions (Endnode and Router)
- *
- * Authors: Steve Whitehouse <SteveW@ACM.org>
- * Eduardo Marcelo Serrat <emserrat@geocities.com>
- *
- * Changes:
- * Steve Whitehouse : Fixes to allow "intra-ethernet" and
- * "return-to-sender" bits on outgoing
- * packets.
- * Steve Whitehouse : Timeouts for cached routes.
- * Steve Whitehouse : Use dst cache for input routes too.
- * Steve Whitehouse : Fixed error values in dn_send_skb.
- * Steve Whitehouse : Rework routing functions to better fit
- * DECnet routing design
- * Alexey Kuznetsov : New SMP locking
- * Steve Whitehouse : More SMP locking changes & dn_cache_dump()
- * Steve Whitehouse : Prerouting NF hook, now really is prerouting.
- * Fixed possible skb leak in rtnetlink funcs.
- * Steve Whitehouse : Dave Miller's dynamic hash table sizing and
- * Alexey Kuznetsov's finer grained locking
- * from ipv4/route.c.
- * Steve Whitehouse : Routing is now starting to look like a
- * sensible set of code now, mainly due to
- * my copying the IPv4 routing code. The
- * hooks here are modified and will continue
- * to evolve for a while.
- * Steve Whitehouse : Real SMP at last :-) Also new netfilter
- * stuff. Look out raw sockets your days
- * are numbered!
- * Steve Whitehouse : Added return-to-sender functions. Added
- * backlog congestion level return codes.
- * Steve Whitehouse : Fixed bug where routes were set up with
- * no ref count on net devices.
- * Steve Whitehouse : RCU for the route cache
- * Steve Whitehouse : Preparations for the flow cache
- * Steve Whitehouse : Prepare for nonlinear skbs
- */
-
-/******************************************************************************
- (c) 1995-1998 E.M. Serrat emserrat@geocities.com
-
-*******************************************************************************/
-
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/netdevice.h>
-#include <linux/inet.h>
-#include <linux/route.h>
-#include <linux/in_route.h>
-#include <linux/slab.h>
-#include <net/sock.h>
-#include <linux/mm.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/init.h>
-#include <linux/rtnetlink.h>
-#include <linux/string.h>
-#include <linux/netfilter_decnet.h>
-#include <linux/rcupdate.h>
-#include <linux/times.h>
-#include <linux/export.h>
-#include <asm/errno.h>
-#include <net/net_namespace.h>
-#include <net/netlink.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/flow.h>
-#include <net/fib_rules.h>
-#include <net/dn.h>
-#include <net/dn_dev.h>
-#include <net/dn_nsp.h>
-#include <net/dn_route.h>
-#include <net/dn_neigh.h>
-#include <net/dn_fib.h>
-
-struct dn_rt_hash_bucket {
- struct dn_route __rcu *chain;
- spinlock_t lock;
-};
-
-extern struct neigh_table dn_neigh_table;
-
-
-static unsigned char dn_hiord_addr[6] = {0xAA, 0x00, 0x04, 0x00, 0x00, 0x00};
-
-static const int dn_rt_min_delay = 2 * HZ;
-static const int dn_rt_max_delay = 10 * HZ;
-static const int dn_rt_mtu_expires = 10 * 60 * HZ;
-
-static unsigned long dn_rt_deadline;
-
-static int dn_dst_gc(struct dst_ops *ops);
-static struct dst_entry *dn_dst_check(struct dst_entry *, __u32);
-static unsigned int dn_dst_default_advmss(const struct dst_entry *dst);
-static unsigned int dn_dst_mtu(const struct dst_entry *dst);
-static void dn_dst_destroy(struct dst_entry *);
-static void dn_dst_ifdown(struct dst_entry *, struct net_device *dev, int how);
-static struct dst_entry *dn_dst_negative_advice(struct dst_entry *);
-static void dn_dst_link_failure(struct sk_buff *);
-static void dn_dst_update_pmtu(struct dst_entry *dst, struct sock *sk,
- struct sk_buff *skb , u32 mtu,
- bool confirm_neigh);
-static void dn_dst_redirect(struct dst_entry *dst, struct sock *sk,
- struct sk_buff *skb);
-static struct neighbour *dn_dst_neigh_lookup(const struct dst_entry *dst,
- struct sk_buff *skb,
- const void *daddr);
-static int dn_route_input(struct sk_buff *);
-static void dn_run_flush(struct timer_list *unused);
-
-static struct dn_rt_hash_bucket *dn_rt_hash_table;
-static unsigned int dn_rt_hash_mask;
-
-static struct timer_list dn_route_timer;
-static DEFINE_TIMER(dn_rt_flush_timer, dn_run_flush);
-int decnet_dst_gc_interval = 2;
-
-static struct dst_ops dn_dst_ops = {
- .family = PF_DECnet,
- .gc_thresh = 128,
- .gc = dn_dst_gc,
- .check = dn_dst_check,
- .default_advmss = dn_dst_default_advmss,
- .mtu = dn_dst_mtu,
- .cow_metrics = dst_cow_metrics_generic,
- .destroy = dn_dst_destroy,
- .ifdown = dn_dst_ifdown,
- .negative_advice = dn_dst_negative_advice,
- .link_failure = dn_dst_link_failure,
- .update_pmtu = dn_dst_update_pmtu,
- .redirect = dn_dst_redirect,
- .neigh_lookup = dn_dst_neigh_lookup,
-};
-
-static void dn_dst_destroy(struct dst_entry *dst)
-{
- struct dn_route *rt = (struct dn_route *) dst;
-
- if (rt->n)
- neigh_release(rt->n);
- dst_destroy_metrics_generic(dst);
-}
-
-static void dn_dst_ifdown(struct dst_entry *dst, struct net_device *dev, int how)
-{
- if (how) {
- struct dn_route *rt = (struct dn_route *) dst;
- struct neighbour *n = rt->n;
-
- if (n && n->dev == dev) {
- n->dev = blackhole_netdev;
- dev_hold(n->dev);
- dev_put(dev);
- }
- }
-}
-
-static __inline__ unsigned int dn_hash(__le16 src, __le16 dst)
-{
- __u16 tmp = (__u16 __force)(src ^ dst);
- tmp ^= (tmp >> 3);
- tmp ^= (tmp >> 5);
- tmp ^= (tmp >> 10);
- return dn_rt_hash_mask & (unsigned int)tmp;
-}
-
-static void dn_dst_check_expire(struct timer_list *unused)
-{
- int i;
- struct dn_route *rt;
- struct dn_route __rcu **rtp;
- unsigned long now = jiffies;
- unsigned long expire = 120 * HZ;
-
- for (i = 0; i <= dn_rt_hash_mask; i++) {
- rtp = &dn_rt_hash_table[i].chain;
-
- spin_lock(&dn_rt_hash_table[i].lock);
- while ((rt = rcu_dereference_protected(*rtp,
- lockdep_is_held(&dn_rt_hash_table[i].lock))) != NULL) {
- if (atomic_read(&rt->dst.__refcnt) > 1 ||
- (now - rt->dst.lastuse) < expire) {
- rtp = &rt->dn_next;
- continue;
- }
- *rtp = rt->dn_next;
- rt->dn_next = NULL;
- dst_dev_put(&rt->dst);
- dst_release(&rt->dst);
- }
- spin_unlock(&dn_rt_hash_table[i].lock);
-
- if (jiffies != now)
- break;
- }
-
- mod_timer(&dn_route_timer, now + decnet_dst_gc_interval * HZ);
-}
-
-static int dn_dst_gc(struct dst_ops *ops)
-{
- struct dn_route *rt;
- struct dn_route __rcu **rtp;
- int i;
- unsigned long now = jiffies;
- unsigned long expire = 10 * HZ;
-
- for (i = 0; i <= dn_rt_hash_mask; i++) {
-
- spin_lock_bh(&dn_rt_hash_table[i].lock);
- rtp = &dn_rt_hash_table[i].chain;
-
- while ((rt = rcu_dereference_protected(*rtp,
- lockdep_is_held(&dn_rt_hash_table[i].lock))) != NULL) {
- if (atomic_read(&rt->dst.__refcnt) > 1 ||
- (now - rt->dst.lastuse) < expire) {
- rtp = &rt->dn_next;
- continue;
- }
- *rtp = rt->dn_next;
- rt->dn_next = NULL;
- dst_dev_put(&rt->dst);
- dst_release(&rt->dst);
- break;
- }
- spin_unlock_bh(&dn_rt_hash_table[i].lock);
- }
-
- return 0;
-}
-
-/*
- * The decnet standards don't impose a particular minimum mtu, what they
- * do insist on is that the routing layer accepts a datagram of at least
- * 230 bytes long. Here we have to subtract the routing header length from
- * 230 to get the minimum acceptable mtu. If there is no neighbour, then we
- * assume the worst and use a long header size.
- *
- * We update both the mtu and the advertised mss (i.e. the segment size we
- * advertise to the other end).
- */
-static void dn_dst_update_pmtu(struct dst_entry *dst, struct sock *sk,
- struct sk_buff *skb, u32 mtu,
- bool confirm_neigh)
-{
- struct dn_route *rt = (struct dn_route *) dst;
- struct neighbour *n = rt->n;
- u32 min_mtu = 230;
- struct dn_dev *dn;
-
- dn = n ? rcu_dereference_raw(n->dev->dn_ptr) : NULL;
-
- if (dn && dn->use_long == 0)
- min_mtu -= 6;
- else
- min_mtu -= 21;
-
- if (dst_metric(dst, RTAX_MTU) > mtu && mtu >= min_mtu) {
- if (!(dst_metric_locked(dst, RTAX_MTU))) {
- dst_metric_set(dst, RTAX_MTU, mtu);
- dst_set_expires(dst, dn_rt_mtu_expires);
- }
- if (!(dst_metric_locked(dst, RTAX_ADVMSS))) {
- u32 mss = mtu - DN_MAX_NSP_DATA_HEADER;
- u32 existing_mss = dst_metric_raw(dst, RTAX_ADVMSS);
- if (!existing_mss || existing_mss > mss)
- dst_metric_set(dst, RTAX_ADVMSS, mss);
- }
- }
-}
-
-static void dn_dst_redirect(struct dst_entry *dst, struct sock *sk,
- struct sk_buff *skb)
-{
-}
-
-/*
- * When a route has been marked obsolete. (e.g. routing cache flush)
- */
-static struct dst_entry *dn_dst_check(struct dst_entry *dst, __u32 cookie)
-{
- return NULL;
-}
-
-static struct dst_entry *dn_dst_negative_advice(struct dst_entry *dst)
-{
- dst_release(dst);
- return NULL;
-}
-
-static void dn_dst_link_failure(struct sk_buff *skb)
-{
-}
-
-static inline int compare_keys(struct flowidn *fl1, struct flowidn *fl2)
-{
- return ((fl1->daddr ^ fl2->daddr) |
- (fl1->saddr ^ fl2->saddr) |
- (fl1->flowidn_mark ^ fl2->flowidn_mark) |
- (fl1->flowidn_scope ^ fl2->flowidn_scope) |
- (fl1->flowidn_oif ^ fl2->flowidn_oif) |
- (fl1->flowidn_iif ^ fl2->flowidn_iif)) == 0;
-}
-
-static int dn_insert_route(struct dn_route *rt, unsigned int hash, struct dn_route **rp)
-{
- struct dn_route *rth;
- struct dn_route __rcu **rthp;
- unsigned long now = jiffies;
-
- rthp = &dn_rt_hash_table[hash].chain;
-
- spin_lock_bh(&dn_rt_hash_table[hash].lock);
- while ((rth = rcu_dereference_protected(*rthp,
- lockdep_is_held(&dn_rt_hash_table[hash].lock))) != NULL) {
- if (compare_keys(&rth->fld, &rt->fld)) {
- /* Put it first */
- *rthp = rth->dn_next;
- rcu_assign_pointer(rth->dn_next,
- dn_rt_hash_table[hash].chain);
- rcu_assign_pointer(dn_rt_hash_table[hash].chain, rth);
-
- dst_hold_and_use(&rth->dst, now);
- spin_unlock_bh(&dn_rt_hash_table[hash].lock);
-
- dst_release_immediate(&rt->dst);
- *rp = rth;
- return 0;
- }
- rthp = &rth->dn_next;
- }
-
- rcu_assign_pointer(rt->dn_next, dn_rt_hash_table[hash].chain);
- rcu_assign_pointer(dn_rt_hash_table[hash].chain, rt);
-
- dst_hold_and_use(&rt->dst, now);
- spin_unlock_bh(&dn_rt_hash_table[hash].lock);
- *rp = rt;
- return 0;
-}
-
-static void dn_run_flush(struct timer_list *unused)
-{
- int i;
- struct dn_route *rt, *next;
-
- for (i = 0; i < dn_rt_hash_mask; i++) {
- spin_lock_bh(&dn_rt_hash_table[i].lock);
-
- rt = xchg((struct dn_route **)&dn_rt_hash_table[i].chain, NULL);
- if (!rt)
- goto nothing_to_declare;
-
- for (; rt; rt = next) {
- next = rcu_dereference_raw(rt->dn_next);
- RCU_INIT_POINTER(rt->dn_next, NULL);
- dst_dev_put(&rt->dst);
- dst_release(&rt->dst);
- }
-
-nothing_to_declare:
- spin_unlock_bh(&dn_rt_hash_table[i].lock);
- }
-}
-
-static DEFINE_SPINLOCK(dn_rt_flush_lock);
-
-void dn_rt_cache_flush(int delay)
-{
- unsigned long now = jiffies;
- int user_mode = !in_interrupt();
-
- if (delay < 0)
- delay = dn_rt_min_delay;
-
- spin_lock_bh(&dn_rt_flush_lock);
-
- if (del_timer(&dn_rt_flush_timer) && delay > 0 && dn_rt_deadline) {
- long tmo = (long)(dn_rt_deadline - now);
-
- if (user_mode && tmo < dn_rt_max_delay - dn_rt_min_delay)
- tmo = 0;
-
- if (delay > tmo)
- delay = tmo;
- }
-
- if (delay <= 0) {
- spin_unlock_bh(&dn_rt_flush_lock);
- dn_run_flush(NULL);
- return;
- }
-
- if (dn_rt_deadline == 0)
- dn_rt_deadline = now + dn_rt_max_delay;
-
- dn_rt_flush_timer.expires = now + delay;
- add_timer(&dn_rt_flush_timer);
- spin_unlock_bh(&dn_rt_flush_lock);
-}
-
-/**
- * dn_return_short - Return a short packet to its sender
- * @skb: The packet to return
- *
- */
-static int dn_return_short(struct sk_buff *skb)
-{
- struct dn_skb_cb *cb;
- unsigned char *ptr;
- __le16 *src;
- __le16 *dst;
-
- /* Add back headers */
- skb_push(skb, skb->data - skb_network_header(skb));
-
- skb = skb_unshare(skb, GFP_ATOMIC);
- if (!skb)
- return NET_RX_DROP;
-
- cb = DN_SKB_CB(skb);
- /* Skip packet length and point to flags */
- ptr = skb->data + 2;
- *ptr++ = (cb->rt_flags & ~DN_RT_F_RQR) | DN_RT_F_RTS;
-
- dst = (__le16 *)ptr;
- ptr += 2;
- src = (__le16 *)ptr;
- ptr += 2;
- *ptr = 0; /* Zero hop count */
-
- swap(*src, *dst);
-
- skb->pkt_type = PACKET_OUTGOING;
- dn_rt_finish_output(skb, NULL, NULL);
- return NET_RX_SUCCESS;
-}
-
-/**
- * dn_return_long - Return a long packet to its sender
- * @skb: The long format packet to return
- *
- */
-static int dn_return_long(struct sk_buff *skb)
-{
- struct dn_skb_cb *cb;
- unsigned char *ptr;
- unsigned char *src_addr, *dst_addr;
- unsigned char tmp[ETH_ALEN];
-
- /* Add back all headers */
- skb_push(skb, skb->data - skb_network_header(skb));
-
- skb = skb_unshare(skb, GFP_ATOMIC);
- if (!skb)
- return NET_RX_DROP;
-
- cb = DN_SKB_CB(skb);
- /* Ignore packet length and point to flags */
- ptr = skb->data + 2;
-
- /* Skip padding */
- if (*ptr & DN_RT_F_PF) {
- char padlen = (*ptr & ~DN_RT_F_PF);
- ptr += padlen;
- }
-
- *ptr++ = (cb->rt_flags & ~DN_RT_F_RQR) | DN_RT_F_RTS;
- ptr += 2;
- dst_addr = ptr;
- ptr += 8;
- src_addr = ptr;
- ptr += 6;
- *ptr = 0; /* Zero hop count */
-
- /* Swap source and destination */
- memcpy(tmp, src_addr, ETH_ALEN);
- memcpy(src_addr, dst_addr, ETH_ALEN);
- memcpy(dst_addr, tmp, ETH_ALEN);
-
- skb->pkt_type = PACKET_OUTGOING;
- dn_rt_finish_output(skb, dst_addr, src_addr);
- return NET_RX_SUCCESS;
-}
-
-/**
- * dn_route_rx_packet - Try and find a route for an incoming packet
- * @net: The applicable net namespace
- * @sk: Socket packet transmitted on
- * @skb: The packet to find a route for
- *
- * Returns: result of input function if route is found, error code otherwise
- */
-static int dn_route_rx_packet(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
- struct dn_skb_cb *cb;
- int err;
-
- err = dn_route_input(skb);
- if (err == 0)
- return dst_input(skb);
-
- cb = DN_SKB_CB(skb);
- if (decnet_debug_level & 4) {
- char *devname = skb->dev ? skb->dev->name : "???";
-
- printk(KERN_DEBUG
- "DECnet: dn_route_rx_packet: rt_flags=0x%02x dev=%s len=%d src=0x%04hx dst=0x%04hx err=%d type=%d\n",
- (int)cb->rt_flags, devname, skb->len,
- le16_to_cpu(cb->src), le16_to_cpu(cb->dst),
- err, skb->pkt_type);
- }
-
- if ((skb->pkt_type == PACKET_HOST) && (cb->rt_flags & DN_RT_F_RQR)) {
- switch (cb->rt_flags & DN_RT_PKT_MSK) {
- case DN_RT_PKT_SHORT:
- return dn_return_short(skb);
- case DN_RT_PKT_LONG:
- return dn_return_long(skb);
- }
- }
-
- kfree_skb(skb);
- return NET_RX_DROP;
-}
-
-static int dn_route_rx_long(struct sk_buff *skb)
-{
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- unsigned char *ptr = skb->data;
-
- if (!pskb_may_pull(skb, 21)) /* 20 for long header, 1 for shortest nsp */
- goto drop_it;
-
- skb_pull(skb, 20);
- skb_reset_transport_header(skb);
-
- /* Destination info */
- ptr += 2;
- cb->dst = dn_eth2dn(ptr);
- if (memcmp(ptr, dn_hiord_addr, 4) != 0)
- goto drop_it;
- ptr += 6;
-
-
- /* Source info */
- ptr += 2;
- cb->src = dn_eth2dn(ptr);
- if (memcmp(ptr, dn_hiord_addr, 4) != 0)
- goto drop_it;
- ptr += 6;
- /* Other junk */
- ptr++;
- cb->hops = *ptr++; /* Visit Count */
-
- return NF_HOOK(NFPROTO_DECNET, NF_DN_PRE_ROUTING,
- &init_net, NULL, skb, skb->dev, NULL,
- dn_route_rx_packet);
-
-drop_it:
- kfree_skb(skb);
- return NET_RX_DROP;
-}
-
-
-
-static int dn_route_rx_short(struct sk_buff *skb)
-{
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- unsigned char *ptr = skb->data;
-
- if (!pskb_may_pull(skb, 6)) /* 5 for short header + 1 for shortest nsp */
- goto drop_it;
-
- skb_pull(skb, 5);
- skb_reset_transport_header(skb);
-
- cb->dst = *(__le16 *)ptr;
- ptr += 2;
- cb->src = *(__le16 *)ptr;
- ptr += 2;
- cb->hops = *ptr & 0x3f;
-
- return NF_HOOK(NFPROTO_DECNET, NF_DN_PRE_ROUTING,
- &init_net, NULL, skb, skb->dev, NULL,
- dn_route_rx_packet);
-
-drop_it:
- kfree_skb(skb);
- return NET_RX_DROP;
-}
-
-static int dn_route_discard(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
- /*
- * I know we drop the packet here, but that's considered success in
- * this case
- */
- kfree_skb(skb);
- return NET_RX_SUCCESS;
-}
-
-static int dn_route_ptp_hello(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
- dn_dev_hello(skb);
- dn_neigh_pointopoint_hello(skb);
- return NET_RX_SUCCESS;
-}
-
-int dn_route_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
-{
- struct dn_skb_cb *cb;
- unsigned char flags = 0;
- __u16 len = le16_to_cpu(*(__le16 *)skb->data);
- struct dn_dev *dn = rcu_dereference(dev->dn_ptr);
- unsigned char padlen = 0;
-
- if (!net_eq(dev_net(dev), &init_net))
- goto dump_it;
-
- if (dn == NULL)
- goto dump_it;
-
- skb = skb_share_check(skb, GFP_ATOMIC);
- if (!skb)
- goto out;
-
- if (!pskb_may_pull(skb, 3))
- goto dump_it;
-
- skb_pull(skb, 2);
-
- if (len > skb->len)
- goto dump_it;
-
- skb_trim(skb, len);
-
- flags = *skb->data;
-
- cb = DN_SKB_CB(skb);
- cb->stamp = jiffies;
- cb->iif = dev->ifindex;
-
- /*
- * If we have padding, remove it.
- */
- if (flags & DN_RT_F_PF) {
- padlen = flags & ~DN_RT_F_PF;
- if (!pskb_may_pull(skb, padlen + 1))
- goto dump_it;
- skb_pull(skb, padlen);
- flags = *skb->data;
- }
-
- skb_reset_network_header(skb);
-
- /*
- * Weed out future version DECnet
- */
- if (flags & DN_RT_F_VER)
- goto dump_it;
-
- cb->rt_flags = flags;
-
- if (decnet_debug_level & 1)
- printk(KERN_DEBUG
- "dn_route_rcv: got 0x%02x from %s [%d %d %d]\n",
- (int)flags, dev->name, len, skb->len,
- padlen);
-
- if (flags & DN_RT_PKT_CNTL) {
- if (unlikely(skb_linearize(skb)))
- goto dump_it;
-
- switch (flags & DN_RT_CNTL_MSK) {
- case DN_RT_PKT_INIT:
- dn_dev_init_pkt(skb);
- break;
- case DN_RT_PKT_VERI:
- dn_dev_veri_pkt(skb);
- break;
- }
-
- if (dn->parms.state != DN_DEV_S_RU)
- goto dump_it;
-
- switch (flags & DN_RT_CNTL_MSK) {
- case DN_RT_PKT_HELO:
- return NF_HOOK(NFPROTO_DECNET, NF_DN_HELLO,
- &init_net, NULL, skb, skb->dev, NULL,
- dn_route_ptp_hello);
-
- case DN_RT_PKT_L1RT:
- case DN_RT_PKT_L2RT:
- return NF_HOOK(NFPROTO_DECNET, NF_DN_ROUTE,
- &init_net, NULL, skb, skb->dev, NULL,
- dn_route_discard);
- case DN_RT_PKT_ERTH:
- return NF_HOOK(NFPROTO_DECNET, NF_DN_HELLO,
- &init_net, NULL, skb, skb->dev, NULL,
- dn_neigh_router_hello);
-
- case DN_RT_PKT_EEDH:
- return NF_HOOK(NFPROTO_DECNET, NF_DN_HELLO,
- &init_net, NULL, skb, skb->dev, NULL,
- dn_neigh_endnode_hello);
- }
- } else {
- if (dn->parms.state != DN_DEV_S_RU)
- goto dump_it;
-
- skb_pull(skb, 1); /* Pull flags */
-
- switch (flags & DN_RT_PKT_MSK) {
- case DN_RT_PKT_LONG:
- return dn_route_rx_long(skb);
- case DN_RT_PKT_SHORT:
- return dn_route_rx_short(skb);
- }
- }
-
-dump_it:
- kfree_skb(skb);
-out:
- return NET_RX_DROP;
-}
-
-static int dn_output(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
- struct dst_entry *dst = skb_dst(skb);
- struct dn_route *rt = (struct dn_route *)dst;
- struct net_device *dev = dst->dev;
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
-
- int err = -EINVAL;
-
- if (rt->n == NULL)
- goto error;
-
- skb->dev = dev;
-
- cb->src = rt->rt_saddr;
- cb->dst = rt->rt_daddr;
-
- /*
- * Always set the Intra-Ethernet bit on all outgoing packets
- * originated on this node. Only valid flag from upper layers
- * is return-to-sender-requested. Set hop count to 0 too.
- */
- cb->rt_flags &= ~DN_RT_F_RQR;
- cb->rt_flags |= DN_RT_F_IE;
- cb->hops = 0;
-
- return NF_HOOK(NFPROTO_DECNET, NF_DN_LOCAL_OUT,
- &init_net, sk, skb, NULL, dev,
- dn_to_neigh_output);
-
-error:
- net_dbg_ratelimited("dn_output: This should not happen\n");
-
- kfree_skb(skb);
-
- return err;
-}
-
-static int dn_forward(struct sk_buff *skb)
-{
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- struct dst_entry *dst = skb_dst(skb);
- struct dn_dev *dn_db = rcu_dereference(dst->dev->dn_ptr);
- struct dn_route *rt;
- int header_len;
- struct net_device *dev = skb->dev;
-
- if (skb->pkt_type != PACKET_HOST)
- goto drop;
-
- /* Ensure that we have enough space for headers */
- rt = (struct dn_route *)skb_dst(skb);
- header_len = dn_db->use_long ? 21 : 6;
- if (skb_cow(skb, LL_RESERVED_SPACE(rt->dst.dev)+header_len))
- goto drop;
-
- /*
- * Hop count exceeded.
- */
- if (++cb->hops > 30)
- goto drop;
-
- skb->dev = rt->dst.dev;
-
- /*
- * If packet goes out same interface it came in on, then set
- * the Intra-Ethernet bit. This has no effect for short
- * packets, so we don't need to test for them here.
- */
- cb->rt_flags &= ~DN_RT_F_IE;
- if (rt->rt_flags & RTCF_DOREDIRECT)
- cb->rt_flags |= DN_RT_F_IE;
-
- return NF_HOOK(NFPROTO_DECNET, NF_DN_FORWARD,
- &init_net, NULL, skb, dev, skb->dev,
- dn_to_neigh_output);
-
-drop:
- kfree_skb(skb);
- return NET_RX_DROP;
-}
-
-/*
- * Used to catch bugs. This should never normally get
- * called.
- */
-static int dn_rt_bug_out(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
-
- net_dbg_ratelimited("dn_rt_bug: skb from:%04x to:%04x\n",
- le16_to_cpu(cb->src), le16_to_cpu(cb->dst));
-
- kfree_skb(skb);
-
- return NET_RX_DROP;
-}
-
-static int dn_rt_bug(struct sk_buff *skb)
-{
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
-
- net_dbg_ratelimited("dn_rt_bug: skb from:%04x to:%04x\n",
- le16_to_cpu(cb->src), le16_to_cpu(cb->dst));
-
- kfree_skb(skb);
-
- return NET_RX_DROP;
-}
-
-static unsigned int dn_dst_default_advmss(const struct dst_entry *dst)
-{
- return dn_mss_from_pmtu(dst->dev, dst_mtu(dst));
-}
-
-static unsigned int dn_dst_mtu(const struct dst_entry *dst)
-{
- unsigned int mtu = dst_metric_raw(dst, RTAX_MTU);
-
- return mtu ? : dst->dev->mtu;
-}
-
-static struct neighbour *dn_dst_neigh_lookup(const struct dst_entry *dst,
- struct sk_buff *skb,
- const void *daddr)
-{
- return __neigh_lookup_errno(&dn_neigh_table, daddr, dst->dev);
-}
-
-static int dn_rt_set_next_hop(struct dn_route *rt, struct dn_fib_res *res)
-{
- struct dn_fib_info *fi = res->fi;
- struct net_device *dev = rt->dst.dev;
- unsigned int mss_metric;
- struct neighbour *n;
-
- if (fi) {
- if (DN_FIB_RES_GW(*res) &&
- DN_FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK)
- rt->rt_gateway = DN_FIB_RES_GW(*res);
- dst_init_metrics(&rt->dst, fi->fib_metrics, true);
- }
- rt->rt_type = res->type;
-
- if (dev != NULL && rt->n == NULL) {
- n = __neigh_lookup_errno(&dn_neigh_table, &rt->rt_gateway, dev);
- if (IS_ERR(n))
- return PTR_ERR(n);
- rt->n = n;
- }
-
- if (dst_metric(&rt->dst, RTAX_MTU) > rt->dst.dev->mtu)
- dst_metric_set(&rt->dst, RTAX_MTU, rt->dst.dev->mtu);
- mss_metric = dst_metric_raw(&rt->dst, RTAX_ADVMSS);
- if (mss_metric) {
- unsigned int mss = dn_mss_from_pmtu(dev, dst_mtu(&rt->dst));
- if (mss_metric > mss)
- dst_metric_set(&rt->dst, RTAX_ADVMSS, mss);
- }
- return 0;
-}
-
-static inline int dn_match_addr(__le16 addr1, __le16 addr2)
-{
- __u16 tmp = le16_to_cpu(addr1) ^ le16_to_cpu(addr2);
- int match = 16;
- while (tmp) {
- tmp >>= 1;
- match--;
- }
- return match;
-}
-
-static __le16 dnet_select_source(const struct net_device *dev, __le16 daddr, int scope)
-{
- __le16 saddr = 0;
- struct dn_dev *dn_db;
- struct dn_ifaddr *ifa;
- int best_match = 0;
- int ret;
-
- rcu_read_lock();
- dn_db = rcu_dereference(dev->dn_ptr);
- for (ifa = rcu_dereference(dn_db->ifa_list);
- ifa != NULL;
- ifa = rcu_dereference(ifa->ifa_next)) {
- if (ifa->ifa_scope > scope)
- continue;
- if (!daddr) {
- saddr = ifa->ifa_local;
- break;
- }
- ret = dn_match_addr(daddr, ifa->ifa_local);
- if (ret > best_match)
- saddr = ifa->ifa_local;
- if (best_match == 0)
- saddr = ifa->ifa_local;
- }
- rcu_read_unlock();
-
- return saddr;
-}
-
-static inline __le16 __dn_fib_res_prefsrc(struct dn_fib_res *res)
-{
- return dnet_select_source(DN_FIB_RES_DEV(*res), DN_FIB_RES_GW(*res), res->scope);
-}
-
-static inline __le16 dn_fib_rules_map_destination(__le16 daddr, struct dn_fib_res *res)
-{
- __le16 mask = dnet_make_mask(res->prefixlen);
- return (daddr&~mask)|res->fi->fib_nh->nh_gw;
-}
-
-static int dn_route_output_slow(struct dst_entry **pprt, const struct flowidn *oldflp, int try_hard)
-{
- struct flowidn fld = {
- .daddr = oldflp->daddr,
- .saddr = oldflp->saddr,
- .flowidn_scope = RT_SCOPE_UNIVERSE,
- .flowidn_mark = oldflp->flowidn_mark,
- .flowidn_iif = LOOPBACK_IFINDEX,
- .flowidn_oif = oldflp->flowidn_oif,
- };
- struct dn_route *rt = NULL;
- struct net_device *dev_out = NULL, *dev;
- struct neighbour *neigh = NULL;
- unsigned int hash;
- unsigned int flags = 0;
- struct dn_fib_res res = { .fi = NULL, .type = RTN_UNICAST };
- int err;
- int free_res = 0;
- __le16 gateway = 0;
-
- if (decnet_debug_level & 16)
- printk(KERN_DEBUG
- "dn_route_output_slow: dst=%04x src=%04x mark=%d"
- " iif=%d oif=%d\n", le16_to_cpu(oldflp->daddr),
- le16_to_cpu(oldflp->saddr),
- oldflp->flowidn_mark, LOOPBACK_IFINDEX,
- oldflp->flowidn_oif);
-
- /* If we have an output interface, verify its a DECnet device */
- if (oldflp->flowidn_oif) {
- dev_out = dev_get_by_index(&init_net, oldflp->flowidn_oif);
- err = -ENODEV;
- if (dev_out && dev_out->dn_ptr == NULL) {
- dev_put(dev_out);
- dev_out = NULL;
- }
- if (dev_out == NULL)
- goto out;
- }
-
- /* If we have a source address, verify that its a local address */
- if (oldflp->saddr) {
- err = -EADDRNOTAVAIL;
-
- if (dev_out) {
- if (dn_dev_islocal(dev_out, oldflp->saddr))
- goto source_ok;
- dev_put(dev_out);
- goto out;
- }
- rcu_read_lock();
- for_each_netdev_rcu(&init_net, dev) {
- if (!dev->dn_ptr)
- continue;
- if (!dn_dev_islocal(dev, oldflp->saddr))
- continue;
- if ((dev->flags & IFF_LOOPBACK) &&
- oldflp->daddr &&
- !dn_dev_islocal(dev, oldflp->daddr))
- continue;
-
- dev_out = dev;
- break;
- }
- rcu_read_unlock();
- if (dev_out == NULL)
- goto out;
- dev_hold(dev_out);
-source_ok:
- ;
- }
-
- /* No destination? Assume its local */
- if (!fld.daddr) {
- fld.daddr = fld.saddr;
-
- dev_put(dev_out);
- err = -EINVAL;
- dev_out = init_net.loopback_dev;
- if (!dev_out->dn_ptr)
- goto out;
- err = -EADDRNOTAVAIL;
- dev_hold(dev_out);
- if (!fld.daddr) {
- fld.daddr =
- fld.saddr = dnet_select_source(dev_out, 0,
- RT_SCOPE_HOST);
- if (!fld.daddr)
- goto done;
- }
- fld.flowidn_oif = LOOPBACK_IFINDEX;
- res.type = RTN_LOCAL;
- goto make_route;
- }
-
- if (decnet_debug_level & 16)
- printk(KERN_DEBUG
- "dn_route_output_slow: initial checks complete."
- " dst=%04x src=%04x oif=%d try_hard=%d\n",
- le16_to_cpu(fld.daddr), le16_to_cpu(fld.saddr),
- fld.flowidn_oif, try_hard);
-
- /*
- * N.B. If the kernel is compiled without router support then
- * dn_fib_lookup() will evaluate to non-zero so this if () block
- * will always be executed.
- */
- err = -ESRCH;
- if (try_hard || (err = dn_fib_lookup(&fld, &res)) != 0) {
- struct dn_dev *dn_db;
- if (err != -ESRCH)
- goto out;
- /*
- * Here the fallback is basically the standard algorithm for
- * routing in endnodes which is described in the DECnet routing
- * docs
- *
- * If we are not trying hard, look in neighbour cache.
- * The result is tested to ensure that if a specific output
- * device/source address was requested, then we honour that
- * here
- */
- if (!try_hard) {
- neigh = neigh_lookup_nodev(&dn_neigh_table, &init_net, &fld.daddr);
- if (neigh) {
- if ((oldflp->flowidn_oif &&
- (neigh->dev->ifindex != oldflp->flowidn_oif)) ||
- (oldflp->saddr &&
- (!dn_dev_islocal(neigh->dev,
- oldflp->saddr)))) {
- neigh_release(neigh);
- neigh = NULL;
- } else {
- dev_put(dev_out);
- if (dn_dev_islocal(neigh->dev, fld.daddr)) {
- dev_out = init_net.loopback_dev;
- res.type = RTN_LOCAL;
- } else {
- dev_out = neigh->dev;
- }
- dev_hold(dev_out);
- goto select_source;
- }
- }
- }
-
- /* Not there? Perhaps its a local address */
- if (dev_out == NULL)
- dev_out = dn_dev_get_default();
- err = -ENODEV;
- if (dev_out == NULL)
- goto out;
- dn_db = rcu_dereference_raw(dev_out->dn_ptr);
- if (!dn_db)
- goto e_inval;
- /* Possible improvement - check all devices for local addr */
- if (dn_dev_islocal(dev_out, fld.daddr)) {
- dev_put(dev_out);
- dev_out = init_net.loopback_dev;
- dev_hold(dev_out);
- res.type = RTN_LOCAL;
- goto select_source;
- }
- /* Not local either.... try sending it to the default router */
- neigh = neigh_clone(dn_db->router);
- BUG_ON(neigh && neigh->dev != dev_out);
-
- /* Ok then, we assume its directly connected and move on */
-select_source:
- if (neigh)
- gateway = container_of(neigh, struct dn_neigh, n)->addr;
- if (gateway == 0)
- gateway = fld.daddr;
- if (fld.saddr == 0) {
- fld.saddr = dnet_select_source(dev_out, gateway,
- res.type == RTN_LOCAL ?
- RT_SCOPE_HOST :
- RT_SCOPE_LINK);
- if (fld.saddr == 0 && res.type != RTN_LOCAL)
- goto e_addr;
- }
- fld.flowidn_oif = dev_out->ifindex;
- goto make_route;
- }
- free_res = 1;
-
- if (res.type == RTN_NAT)
- goto e_inval;
-
- if (res.type == RTN_LOCAL) {
- if (!fld.saddr)
- fld.saddr = fld.daddr;
- dev_put(dev_out);
- dev_out = init_net.loopback_dev;
- dev_hold(dev_out);
- if (!dev_out->dn_ptr)
- goto e_inval;
- fld.flowidn_oif = dev_out->ifindex;
- if (res.fi)
- dn_fib_info_put(res.fi);
- res.fi = NULL;
- goto make_route;
- }
-
- if (res.fi->fib_nhs > 1 && fld.flowidn_oif == 0)
- dn_fib_select_multipath(&fld, &res);
-
- /*
- * We could add some logic to deal with default routes here and
- * get rid of some of the special casing above.
- */
-
- if (!fld.saddr)
- fld.saddr = DN_FIB_RES_PREFSRC(res);
-
- dev_put(dev_out);
- dev_out = DN_FIB_RES_DEV(res);
- dev_hold(dev_out);
- fld.flowidn_oif = dev_out->ifindex;
- gateway = DN_FIB_RES_GW(res);
-
-make_route:
- if (dev_out->flags & IFF_LOOPBACK)
- flags |= RTCF_LOCAL;
-
- rt = dst_alloc(&dn_dst_ops, dev_out, 0, DST_OBSOLETE_NONE, 0);
- if (rt == NULL)
- goto e_nobufs;
-
- rt->dn_next = NULL;
- memset(&rt->fld, 0, sizeof(rt->fld));
- rt->fld.saddr = oldflp->saddr;
- rt->fld.daddr = oldflp->daddr;
- rt->fld.flowidn_oif = oldflp->flowidn_oif;
- rt->fld.flowidn_iif = 0;
- rt->fld.flowidn_mark = oldflp->flowidn_mark;
-
- rt->rt_saddr = fld.saddr;
- rt->rt_daddr = fld.daddr;
- rt->rt_gateway = gateway ? gateway : fld.daddr;
- rt->rt_local_src = fld.saddr;
-
- rt->rt_dst_map = fld.daddr;
- rt->rt_src_map = fld.saddr;
-
- rt->n = neigh;
- neigh = NULL;
-
- rt->dst.lastuse = jiffies;
- rt->dst.output = dn_output;
- rt->dst.input = dn_rt_bug;
- rt->rt_flags = flags;
- if (flags & RTCF_LOCAL)
- rt->dst.input = dn_nsp_rx;
-
- err = dn_rt_set_next_hop(rt, &res);
- if (err)
- goto e_neighbour;
-
- hash = dn_hash(rt->fld.saddr, rt->fld.daddr);
- /* dn_insert_route() increments dst->__refcnt */
- dn_insert_route(rt, hash, (struct dn_route **)pprt);
-
-done:
- if (neigh)
- neigh_release(neigh);
- if (free_res)
- dn_fib_res_put(&res);
- dev_put(dev_out);
-out:
- return err;
-
-e_addr:
- err = -EADDRNOTAVAIL;
- goto done;
-e_inval:
- err = -EINVAL;
- goto done;
-e_nobufs:
- err = -ENOBUFS;
- goto done;
-e_neighbour:
- dst_release_immediate(&rt->dst);
- goto e_nobufs;
-}
-
-
-/*
- * N.B. The flags may be moved into the flowi at some future stage.
- */
-static int __dn_route_output_key(struct dst_entry **pprt, const struct flowidn *flp, int flags)
-{
- unsigned int hash = dn_hash(flp->saddr, flp->daddr);
- struct dn_route *rt = NULL;
-
- if (!(flags & MSG_TRYHARD)) {
- rcu_read_lock_bh();
- for (rt = rcu_dereference_bh(dn_rt_hash_table[hash].chain); rt;
- rt = rcu_dereference_bh(rt->dn_next)) {
- if ((flp->daddr == rt->fld.daddr) &&
- (flp->saddr == rt->fld.saddr) &&
- (flp->flowidn_mark == rt->fld.flowidn_mark) &&
- dn_is_output_route(rt) &&
- (rt->fld.flowidn_oif == flp->flowidn_oif)) {
- dst_hold_and_use(&rt->dst, jiffies);
- rcu_read_unlock_bh();
- *pprt = &rt->dst;
- return 0;
- }
- }
- rcu_read_unlock_bh();
- }
-
- return dn_route_output_slow(pprt, flp, flags);
-}
-
-static int dn_route_output_key(struct dst_entry **pprt, struct flowidn *flp, int flags)
-{
- int err;
-
- err = __dn_route_output_key(pprt, flp, flags);
- if (err == 0 && flp->flowidn_proto) {
- *pprt = xfrm_lookup(&init_net, *pprt,
- flowidn_to_flowi(flp), NULL, 0);
- if (IS_ERR(*pprt)) {
- err = PTR_ERR(*pprt);
- *pprt = NULL;
- }
- }
- return err;
-}
-
-int dn_route_output_sock(struct dst_entry __rcu **pprt, struct flowidn *fl, struct sock *sk, int flags)
-{
- int err;
-
- err = __dn_route_output_key(pprt, fl, flags & MSG_TRYHARD);
- if (err == 0 && fl->flowidn_proto) {
- *pprt = xfrm_lookup(&init_net, *pprt,
- flowidn_to_flowi(fl), sk, 0);
- if (IS_ERR(*pprt)) {
- err = PTR_ERR(*pprt);
- *pprt = NULL;
- }
- }
- return err;
-}
-
-static int dn_route_input_slow(struct sk_buff *skb)
-{
- struct dn_route *rt = NULL;
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- struct net_device *in_dev = skb->dev;
- struct net_device *out_dev = NULL;
- struct dn_dev *dn_db;
- struct neighbour *neigh = NULL;
- unsigned int hash;
- int flags = 0;
- __le16 gateway = 0;
- __le16 local_src = 0;
- struct flowidn fld = {
- .daddr = cb->dst,
- .saddr = cb->src,
- .flowidn_scope = RT_SCOPE_UNIVERSE,
- .flowidn_mark = skb->mark,
- .flowidn_iif = skb->dev->ifindex,
- };
- struct dn_fib_res res = { .fi = NULL, .type = RTN_UNREACHABLE };
- int err = -EINVAL;
- int free_res = 0;
-
- dev_hold(in_dev);
-
- dn_db = rcu_dereference(in_dev->dn_ptr);
- if (!dn_db)
- goto out;
-
- /* Zero source addresses are not allowed */
- if (fld.saddr == 0)
- goto out;
-
- /*
- * In this case we've just received a packet from a source
- * outside ourselves pretending to come from us. We don't
- * allow it any further to prevent routing loops, spoofing and
- * other nasties. Loopback packets already have the dst attached
- * so this only affects packets which have originated elsewhere.
- */
- err = -ENOTUNIQ;
- if (dn_dev_islocal(in_dev, cb->src))
- goto out;
-
- err = dn_fib_lookup(&fld, &res);
- if (err) {
- if (err != -ESRCH)
- goto out;
- /*
- * Is the destination us ?
- */
- if (!dn_dev_islocal(in_dev, cb->dst))
- goto e_inval;
-
- res.type = RTN_LOCAL;
- } else {
- __le16 src_map = fld.saddr;
- free_res = 1;
-
- out_dev = DN_FIB_RES_DEV(res);
- if (out_dev == NULL) {
- net_crit_ratelimited("Bug in dn_route_input_slow() No output device\n");
- goto e_inval;
- }
- dev_hold(out_dev);
-
- if (res.r)
- src_map = fld.saddr; /* no NAT support for now */
-
- gateway = DN_FIB_RES_GW(res);
- if (res.type == RTN_NAT) {
- fld.daddr = dn_fib_rules_map_destination(fld.daddr, &res);
- dn_fib_res_put(&res);
- free_res = 0;
- if (dn_fib_lookup(&fld, &res))
- goto e_inval;
- free_res = 1;
- if (res.type != RTN_UNICAST)
- goto e_inval;
- flags |= RTCF_DNAT;
- gateway = fld.daddr;
- }
- fld.saddr = src_map;
- }
-
- switch (res.type) {
- case RTN_UNICAST:
- /*
- * Forwarding check here, we only check for forwarding
- * being turned off, if you want to only forward intra
- * area, its up to you to set the routing tables up
- * correctly.
- */
- if (dn_db->parms.forwarding == 0)
- goto e_inval;
-
- if (res.fi->fib_nhs > 1 && fld.flowidn_oif == 0)
- dn_fib_select_multipath(&fld, &res);
-
- /*
- * Check for out_dev == in_dev. We use the RTCF_DOREDIRECT
- * flag as a hint to set the intra-ethernet bit when
- * forwarding. If we've got NAT in operation, we don't do
- * this optimisation.
- */
- if (out_dev == in_dev && !(flags & RTCF_NAT))
- flags |= RTCF_DOREDIRECT;
-
- local_src = DN_FIB_RES_PREFSRC(res);
- break;
- case RTN_BLACKHOLE:
- case RTN_UNREACHABLE:
- break;
- case RTN_LOCAL:
- flags |= RTCF_LOCAL;
- fld.saddr = cb->dst;
- fld.daddr = cb->src;
-
- /* Routing tables gave us a gateway */
- if (gateway)
- goto make_route;
-
- /* Packet was intra-ethernet, so we know its on-link */
- if (cb->rt_flags & DN_RT_F_IE) {
- gateway = cb->src;
- goto make_route;
- }
-
- /* Use the default router if there is one */
- neigh = neigh_clone(dn_db->router);
- if (neigh) {
- gateway = container_of(neigh, struct dn_neigh, n)->addr;
- goto make_route;
- }
-
- /* Close eyes and pray */
- gateway = cb->src;
- goto make_route;
- default:
- goto e_inval;
- }
-
-make_route:
- rt = dst_alloc(&dn_dst_ops, out_dev, 1, DST_OBSOLETE_NONE, 0);
- if (rt == NULL)
- goto e_nobufs;
-
- rt->dn_next = NULL;
- memset(&rt->fld, 0, sizeof(rt->fld));
- rt->rt_saddr = fld.saddr;
- rt->rt_daddr = fld.daddr;
- rt->rt_gateway = fld.daddr;
- if (gateway)
- rt->rt_gateway = gateway;
- rt->rt_local_src = local_src ? local_src : rt->rt_saddr;
-
- rt->rt_dst_map = fld.daddr;
- rt->rt_src_map = fld.saddr;
-
- rt->fld.saddr = cb->src;
- rt->fld.daddr = cb->dst;
- rt->fld.flowidn_oif = 0;
- rt->fld.flowidn_iif = in_dev->ifindex;
- rt->fld.flowidn_mark = fld.flowidn_mark;
-
- rt->n = neigh;
- rt->dst.lastuse = jiffies;
- rt->dst.output = dn_rt_bug_out;
- switch (res.type) {
- case RTN_UNICAST:
- rt->dst.input = dn_forward;
- break;
- case RTN_LOCAL:
- rt->dst.output = dn_output;
- rt->dst.input = dn_nsp_rx;
- rt->dst.dev = in_dev;
- flags |= RTCF_LOCAL;
- break;
- default:
- case RTN_UNREACHABLE:
- case RTN_BLACKHOLE:
- rt->dst.input = dst_discard;
- }
- rt->rt_flags = flags;
-
- err = dn_rt_set_next_hop(rt, &res);
- if (err)
- goto e_neighbour;
-
- hash = dn_hash(rt->fld.saddr, rt->fld.daddr);
- /* dn_insert_route() increments dst->__refcnt */
- dn_insert_route(rt, hash, &rt);
- skb_dst_set(skb, &rt->dst);
-
-done:
- if (neigh)
- neigh_release(neigh);
- if (free_res)
- dn_fib_res_put(&res);
- dev_put(in_dev);
- dev_put(out_dev);
-out:
- return err;
-
-e_inval:
- err = -EINVAL;
- goto done;
-
-e_nobufs:
- err = -ENOBUFS;
- goto done;
-
-e_neighbour:
- dst_release_immediate(&rt->dst);
- goto done;
-}
-
-static int dn_route_input(struct sk_buff *skb)
-{
- struct dn_route *rt;
- struct dn_skb_cb *cb = DN_SKB_CB(skb);
- unsigned int hash = dn_hash(cb->src, cb->dst);
-
- if (skb_dst(skb))
- return 0;
-
- rcu_read_lock();
- for (rt = rcu_dereference(dn_rt_hash_table[hash].chain); rt != NULL;
- rt = rcu_dereference(rt->dn_next)) {
- if ((rt->fld.saddr == cb->src) &&
- (rt->fld.daddr == cb->dst) &&
- (rt->fld.flowidn_oif == 0) &&
- (rt->fld.flowidn_mark == skb->mark) &&
- (rt->fld.flowidn_iif == cb->iif)) {
- dst_hold_and_use(&rt->dst, jiffies);
- rcu_read_unlock();
- skb_dst_set(skb, (struct dst_entry *)rt);
- return 0;
- }
- }
- rcu_read_unlock();
-
- return dn_route_input_slow(skb);
-}
-
-static int dn_rt_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
- int event, int nowait, unsigned int flags)
-{
- struct dn_route *rt = (struct dn_route *)skb_dst(skb);
- struct rtmsg *r;
- struct nlmsghdr *nlh;
- long expires;
-
- nlh = nlmsg_put(skb, portid, seq, event, sizeof(*r), flags);
- if (!nlh)
- return -EMSGSIZE;
-
- r = nlmsg_data(nlh);
- r->rtm_family = AF_DECnet;
- r->rtm_dst_len = 16;
- r->rtm_src_len = 0;
- r->rtm_tos = 0;
- r->rtm_table = RT_TABLE_MAIN;
- r->rtm_type = rt->rt_type;
- r->rtm_flags = (rt->rt_flags & ~0xFFFF) | RTM_F_CLONED;
- r->rtm_scope = RT_SCOPE_UNIVERSE;
- r->rtm_protocol = RTPROT_UNSPEC;
-
- if (rt->rt_flags & RTCF_NOTIFY)
- r->rtm_flags |= RTM_F_NOTIFY;
-
- if (nla_put_u32(skb, RTA_TABLE, RT_TABLE_MAIN) < 0 ||
- nla_put_le16(skb, RTA_DST, rt->rt_daddr) < 0)
- goto errout;
-
- if (rt->fld.saddr) {
- r->rtm_src_len = 16;
- if (nla_put_le16(skb, RTA_SRC, rt->fld.saddr) < 0)
- goto errout;
- }
- if (rt->dst.dev &&
- nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex) < 0)
- goto errout;
-
- /*
- * Note to self - change this if input routes reverse direction when
- * they deal only with inputs and not with replies like they do
- * currently.
- */
- if (nla_put_le16(skb, RTA_PREFSRC, rt->rt_local_src) < 0)
- goto errout;
-
- if (rt->rt_daddr != rt->rt_gateway &&
- nla_put_le16(skb, RTA_GATEWAY, rt->rt_gateway) < 0)
- goto errout;
-
- if (rtnetlink_put_metrics(skb, dst_metrics_ptr(&rt->dst)) < 0)
- goto errout;
-
- expires = rt->dst.expires ? rt->dst.expires - jiffies : 0;
- if (rtnl_put_cacheinfo(skb, &rt->dst, 0, expires,
- rt->dst.error) < 0)
- goto errout;
-
- if (dn_is_input_route(rt) &&
- nla_put_u32(skb, RTA_IIF, rt->fld.flowidn_iif) < 0)
- goto errout;
-
- nlmsg_end(skb, nlh);
- return 0;
-
-errout:
- nlmsg_cancel(skb, nlh);
- return -EMSGSIZE;
-}
-
-const struct nla_policy rtm_dn_policy[RTA_MAX + 1] = {
- [RTA_DST] = { .type = NLA_U16 },
- [RTA_SRC] = { .type = NLA_U16 },
- [RTA_IIF] = { .type = NLA_U32 },
- [RTA_OIF] = { .type = NLA_U32 },
- [RTA_GATEWAY] = { .type = NLA_U16 },
- [RTA_PRIORITY] = { .type = NLA_U32 },
- [RTA_PREFSRC] = { .type = NLA_U16 },
- [RTA_METRICS] = { .type = NLA_NESTED },
- [RTA_MULTIPATH] = { .type = NLA_NESTED },
- [RTA_TABLE] = { .type = NLA_U32 },
- [RTA_MARK] = { .type = NLA_U32 },
-};
-
-/*
- * This is called by both endnodes and routers now.
- */
-static int dn_cache_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh,
- struct netlink_ext_ack *extack)
-{
- struct net *net = sock_net(in_skb->sk);
- struct rtmsg *rtm = nlmsg_data(nlh);
- struct dn_route *rt = NULL;
- struct dn_skb_cb *cb;
- int err;
- struct sk_buff *skb;
- struct flowidn fld;
- struct nlattr *tb[RTA_MAX+1];
-
- if (!net_eq(net, &init_net))
- return -EINVAL;
-
- err = nlmsg_parse_deprecated(nlh, sizeof(*rtm), tb, RTA_MAX,
- rtm_dn_policy, extack);
- if (err < 0)
- return err;
-
- memset(&fld, 0, sizeof(fld));
- fld.flowidn_proto = DNPROTO_NSP;
-
- skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
- if (skb == NULL)
- return -ENOBUFS;
- skb_reset_mac_header(skb);
- cb = DN_SKB_CB(skb);
-
- if (tb[RTA_SRC])
- fld.saddr = nla_get_le16(tb[RTA_SRC]);
-
- if (tb[RTA_DST])
- fld.daddr = nla_get_le16(tb[RTA_DST]);
-
- if (tb[RTA_IIF])
- fld.flowidn_iif = nla_get_u32(tb[RTA_IIF]);
-
- if (fld.flowidn_iif) {
- struct net_device *dev;
- dev = __dev_get_by_index(&init_net, fld.flowidn_iif);
- if (!dev || !dev->dn_ptr) {
- kfree_skb(skb);
- return -ENODEV;
- }
- skb->protocol = htons(ETH_P_DNA_RT);
- skb->dev = dev;
- cb->src = fld.saddr;
- cb->dst = fld.daddr;
- local_bh_disable();
- err = dn_route_input(skb);
- local_bh_enable();
- memset(cb, 0, sizeof(struct dn_skb_cb));
- rt = (struct dn_route *)skb_dst(skb);
- if (!err && -rt->dst.error)
- err = rt->dst.error;
- } else {
- if (tb[RTA_OIF])
- fld.flowidn_oif = nla_get_u32(tb[RTA_OIF]);
-
- err = dn_route_output_key((struct dst_entry **)&rt, &fld, 0);
- }
-
- skb->dev = NULL;
- if (err)
- goto out_free;
- skb_dst_set(skb, &rt->dst);
- if (rtm->rtm_flags & RTM_F_NOTIFY)
- rt->rt_flags |= RTCF_NOTIFY;
-
- err = dn_rt_fill_info(skb, NETLINK_CB(in_skb).portid, nlh->nlmsg_seq, RTM_NEWROUTE, 0, 0);
- if (err < 0) {
- err = -EMSGSIZE;
- goto out_free;
- }
-
- return rtnl_unicast(skb, &init_net, NETLINK_CB(in_skb).portid);
-
-out_free:
- kfree_skb(skb);
- return err;
-}
-
-/*
- * For routers, this is called from dn_fib_dump, but for endnodes its
- * called directly from the rtnetlink dispatch table.
- */
-int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb)
-{
- struct net *net = sock_net(skb->sk);
- struct dn_route *rt;
- int h, s_h;
- int idx, s_idx;
- struct rtmsg *rtm;
-
- if (!net_eq(net, &init_net))
- return 0;
-
- if (nlmsg_len(cb->nlh) < sizeof(struct rtmsg))
- return -EINVAL;
-
- rtm = nlmsg_data(cb->nlh);
- if (!(rtm->rtm_flags & RTM_F_CLONED))
- return 0;
-
- s_h = cb->args[0];
- s_idx = idx = cb->args[1];
- for (h = 0; h <= dn_rt_hash_mask; h++) {
- if (h < s_h)
- continue;
- if (h > s_h)
- s_idx = 0;
- rcu_read_lock_bh();
- for (rt = rcu_dereference_bh(dn_rt_hash_table[h].chain), idx = 0;
- rt;
- rt = rcu_dereference_bh(rt->dn_next), idx++) {
- if (idx < s_idx)
- continue;
- skb_dst_set(skb, dst_clone(&rt->dst));
- if (dn_rt_fill_info(skb, NETLINK_CB(cb->skb).portid,
- cb->nlh->nlmsg_seq, RTM_NEWROUTE,
- 1, NLM_F_MULTI) < 0) {
- skb_dst_drop(skb);
- rcu_read_unlock_bh();
- goto done;
- }
- skb_dst_drop(skb);
- }
- rcu_read_unlock_bh();
- }
-
-done:
- cb->args[0] = h;
- cb->args[1] = idx;
- return skb->len;
-}
-
-#ifdef CONFIG_PROC_FS
-struct dn_rt_cache_iter_state {
- int bucket;
-};
-
-static struct dn_route *dn_rt_cache_get_first(struct seq_file *seq)
-{
- struct dn_route *rt = NULL;
- struct dn_rt_cache_iter_state *s = seq->private;
-
- for (s->bucket = dn_rt_hash_mask; s->bucket >= 0; --s->bucket) {
- rcu_read_lock_bh();
- rt = rcu_dereference_bh(dn_rt_hash_table[s->bucket].chain);
- if (rt)
- break;
- rcu_read_unlock_bh();
- }
- return rt;
-}
-
-static struct dn_route *dn_rt_cache_get_next(struct seq_file *seq, struct dn_route *rt)
-{
- struct dn_rt_cache_iter_state *s = seq->private;
-
- rt = rcu_dereference_bh(rt->dn_next);
- while (!rt) {
- rcu_read_unlock_bh();
- if (--s->bucket < 0)
- break;
- rcu_read_lock_bh();
- rt = rcu_dereference_bh(dn_rt_hash_table[s->bucket].chain);
- }
- return rt;
-}
-
-static void *dn_rt_cache_seq_start(struct seq_file *seq, loff_t *pos)
-{
- struct dn_route *rt = dn_rt_cache_get_first(seq);
-
- if (rt) {
- while (*pos && (rt = dn_rt_cache_get_next(seq, rt)))
- --*pos;
- }
- return *pos ? NULL : rt;
-}
-
-static void *dn_rt_cache_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- struct dn_route *rt = dn_rt_cache_get_next(seq, v);
- ++*pos;
- return rt;
-}
-
-static void dn_rt_cache_seq_stop(struct seq_file *seq, void *v)
-{
- if (v)
- rcu_read_unlock_bh();
-}
-
-static int dn_rt_cache_seq_show(struct seq_file *seq, void *v)
-{
- struct dn_route *rt = v;
- char buf1[DN_ASCBUF_LEN], buf2[DN_ASCBUF_LEN];
-
- seq_printf(seq, "%-8s %-7s %-7s %04d %04d %04d\n",
- rt->dst.dev ? rt->dst.dev->name : "*",
- dn_addr2asc(le16_to_cpu(rt->rt_daddr), buf1),
- dn_addr2asc(le16_to_cpu(rt->rt_saddr), buf2),
- atomic_read(&rt->dst.__refcnt),
- rt->dst.__use, 0);
- return 0;
-}
-
-static const struct seq_operations dn_rt_cache_seq_ops = {
- .start = dn_rt_cache_seq_start,
- .next = dn_rt_cache_seq_next,
- .stop = dn_rt_cache_seq_stop,
- .show = dn_rt_cache_seq_show,
-};
-#endif /* CONFIG_PROC_FS */
-
-void __init dn_route_init(void)
-{
- int i, goal, order;
-
- dn_dst_ops.kmem_cachep =
- kmem_cache_create("dn_dst_cache", sizeof(struct dn_route), 0,
- SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
- dst_entries_init(&dn_dst_ops);
- timer_setup(&dn_route_timer, dn_dst_check_expire, 0);
- dn_route_timer.expires = jiffies + decnet_dst_gc_interval * HZ;
- add_timer(&dn_route_timer);
-
- goal = totalram_pages() >> (26 - PAGE_SHIFT);
-
- for (order = 0; (1UL << order) < goal; order++)
- /* NOTHING */;
-
- /*
- * Only want 1024 entries max, since the table is very, very unlikely
- * to be larger than that.
- */
- while (order && ((((1UL << order) * PAGE_SIZE) /
- sizeof(struct dn_rt_hash_bucket)) >= 2048))
- order--;
-
- do {
- dn_rt_hash_mask = (1UL << order) * PAGE_SIZE /
- sizeof(struct dn_rt_hash_bucket);
- while (dn_rt_hash_mask & (dn_rt_hash_mask - 1))
- dn_rt_hash_mask--;
- dn_rt_hash_table = (struct dn_rt_hash_bucket *)
- __get_free_pages(GFP_ATOMIC, order);
- } while (dn_rt_hash_table == NULL && --order > 0);
-
- if (!dn_rt_hash_table)
- panic("Failed to allocate DECnet route cache hash table\n");
-
- printk(KERN_INFO
- "DECnet: Routing cache hash table of %u buckets, %ldKbytes\n",
- dn_rt_hash_mask,
- (long)(dn_rt_hash_mask*sizeof(struct dn_rt_hash_bucket))/1024);
-
- dn_rt_hash_mask--;
- for (i = 0; i <= dn_rt_hash_mask; i++) {
- spin_lock_init(&dn_rt_hash_table[i].lock);
- dn_rt_hash_table[i].chain = NULL;
- }
-
- dn_dst_ops.gc_thresh = (dn_rt_hash_mask + 1);
-
- proc_create_seq_private("decnet_cache", 0444, init_net.proc_net,
- &dn_rt_cache_seq_ops,
- sizeof(struct dn_rt_cache_iter_state), NULL);
-
-#ifdef CONFIG_DECNET_ROUTER
- rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_GETROUTE,
- dn_cache_getroute, dn_fib_dump, 0);
-#else
- rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_GETROUTE,
- dn_cache_getroute, dn_cache_dump, 0);
-#endif
-}
-
-void __exit dn_route_cleanup(void)
-{
- del_timer(&dn_route_timer);
- dn_run_flush(NULL);
-
- remove_proc_entry("decnet_cache", init_net.proc_net);
- dst_entries_destroy(&dn_dst_ops);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-
-/*
- * DECnet An implementation of the DECnet protocol suite for the LINUX
- * operating system. DECnet is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * DECnet Routing Forwarding Information Base (Rules)
- *
- * Author: Steve Whitehouse <SteveW@ACM.org>
- * Mostly copied from Alexey Kuznetsov's ipv4/fib_rules.c
- *
- *
- * Changes:
- * Steve Whitehouse <steve@chygwyn.com>
- * Updated for Thomas Graf's generic rules
- *
- */
-#include <linux/net.h>
-#include <linux/init.h>
-#include <linux/netlink.h>
-#include <linux/rtnetlink.h>
-#include <linux/netdevice.h>
-#include <linux/spinlock.h>
-#include <linux/list.h>
-#include <linux/rcupdate.h>
-#include <linux/export.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/flow.h>
-#include <net/fib_rules.h>
-#include <net/dn.h>
-#include <net/dn_fib.h>
-#include <net/dn_neigh.h>
-#include <net/dn_dev.h>
-#include <net/dn_route.h>
-
-static struct fib_rules_ops *dn_fib_rules_ops;
-
-struct dn_fib_rule
-{
- struct fib_rule common;
- unsigned char dst_len;
- unsigned char src_len;
- __le16 src;
- __le16 srcmask;
- __le16 dst;
- __le16 dstmask;
- __le16 srcmap;
- u8 flags;
-};
-
-
-int dn_fib_lookup(struct flowidn *flp, struct dn_fib_res *res)
-{
- struct fib_lookup_arg arg = {
- .result = res,
- };
- int err;
-
- err = fib_rules_lookup(dn_fib_rules_ops,
- flowidn_to_flowi(flp), 0, &arg);
- res->r = arg.rule;
-
- return err;
-}
-
-static int dn_fib_rule_action(struct fib_rule *rule, struct flowi *flp,
- int flags, struct fib_lookup_arg *arg)
-{
- struct flowidn *fld = &flp->u.dn;
- int err = -EAGAIN;
- struct dn_fib_table *tbl;
-
- switch(rule->action) {
- case FR_ACT_TO_TBL:
- break;
-
- case FR_ACT_UNREACHABLE:
- err = -ENETUNREACH;
- goto errout;
-
- case FR_ACT_PROHIBIT:
- err = -EACCES;
- goto errout;
-
- case FR_ACT_BLACKHOLE:
- default:
- err = -EINVAL;
- goto errout;
- }
-
- tbl = dn_fib_get_table(rule->table, 0);
- if (tbl == NULL)
- goto errout;
-
- err = tbl->lookup(tbl, fld, (struct dn_fib_res *)arg->result);
- if (err > 0)
- err = -EAGAIN;
-errout:
- return err;
-}
-
-static int dn_fib_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
-{
- struct dn_fib_rule *r = (struct dn_fib_rule *)rule;
- struct flowidn *fld = &fl->u.dn;
- __le16 daddr = fld->daddr;
- __le16 saddr = fld->saddr;
-
- if (((saddr ^ r->src) & r->srcmask) ||
- ((daddr ^ r->dst) & r->dstmask))
- return 0;
-
- return 1;
-}
-
-static int dn_fib_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
- struct fib_rule_hdr *frh,
- struct nlattr **tb,
- struct netlink_ext_ack *extack)
-{
- int err = -EINVAL;
- struct dn_fib_rule *r = (struct dn_fib_rule *)rule;
-
- if (frh->tos) {
- NL_SET_ERR_MSG(extack, "Invalid tos value");
- goto errout;
- }
-
- if (rule->table == RT_TABLE_UNSPEC) {
- if (rule->action == FR_ACT_TO_TBL) {
- struct dn_fib_table *table;
-
- table = dn_fib_empty_table();
- if (table == NULL) {
- err = -ENOBUFS;
- goto errout;
- }
-
- rule->table = table->n;
- }
- }
-
- if (frh->src_len)
- r->src = nla_get_le16(tb[FRA_SRC]);
-
- if (frh->dst_len)
- r->dst = nla_get_le16(tb[FRA_DST]);
-
- r->src_len = frh->src_len;
- r->srcmask = dnet_make_mask(r->src_len);
- r->dst_len = frh->dst_len;
- r->dstmask = dnet_make_mask(r->dst_len);
- err = 0;
-errout:
- return err;
-}
-
-static int dn_fib_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
- struct nlattr **tb)
-{
- struct dn_fib_rule *r = (struct dn_fib_rule *)rule;
-
- if (frh->src_len && (r->src_len != frh->src_len))
- return 0;
-
- if (frh->dst_len && (r->dst_len != frh->dst_len))
- return 0;
-
- if (frh->src_len && (r->src != nla_get_le16(tb[FRA_SRC])))
- return 0;
-
- if (frh->dst_len && (r->dst != nla_get_le16(tb[FRA_DST])))
- return 0;
-
- return 1;
-}
-
-unsigned int dnet_addr_type(__le16 addr)
-{
- struct flowidn fld = { .daddr = addr };
- struct dn_fib_res res;
- unsigned int ret = RTN_UNICAST;
- struct dn_fib_table *tb = dn_fib_get_table(RT_TABLE_LOCAL, 0);
-
- res.r = NULL;
-
- if (tb) {
- if (!tb->lookup(tb, &fld, &res)) {
- ret = res.type;
- dn_fib_res_put(&res);
- }
- }
- return ret;
-}
-
-static int dn_fib_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
- struct fib_rule_hdr *frh)
-{
- struct dn_fib_rule *r = (struct dn_fib_rule *)rule;
-
- frh->dst_len = r->dst_len;
- frh->src_len = r->src_len;
- frh->tos = 0;
-
- if ((r->dst_len &&
- nla_put_le16(skb, FRA_DST, r->dst)) ||
- (r->src_len &&
- nla_put_le16(skb, FRA_SRC, r->src)))
- goto nla_put_failure;
- return 0;
-
-nla_put_failure:
- return -ENOBUFS;
-}
-
-static void dn_fib_rule_flush_cache(struct fib_rules_ops *ops)
-{
- dn_rt_cache_flush(-1);
-}
-
-static const struct fib_rules_ops __net_initconst dn_fib_rules_ops_template = {
- .family = AF_DECnet,
- .rule_size = sizeof(struct dn_fib_rule),
- .addr_size = sizeof(u16),
- .action = dn_fib_rule_action,
- .match = dn_fib_rule_match,
- .configure = dn_fib_rule_configure,
- .compare = dn_fib_rule_compare,
- .fill = dn_fib_rule_fill,
- .flush_cache = dn_fib_rule_flush_cache,
- .nlgroup = RTNLGRP_DECnet_RULE,
- .owner = THIS_MODULE,
- .fro_net = &init_net,
-};
-
-void __init dn_fib_rules_init(void)
-{
- dn_fib_rules_ops =
- fib_rules_register(&dn_fib_rules_ops_template, &init_net);
- BUG_ON(IS_ERR(dn_fib_rules_ops));
- BUG_ON(fib_default_rule_add(dn_fib_rules_ops, 0x7fff,
- RT_TABLE_MAIN, 0));
-}
-
-void __exit dn_fib_rules_cleanup(void)
-{
- rtnl_lock();
- fib_rules_unregister(dn_fib_rules_ops);
- rtnl_unlock();
- rcu_barrier();
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * DECnet An implementation of the DECnet protocol suite for the LINUX
- * operating system. DECnet is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * DECnet Routing Forwarding Information Base (Routing Tables)
- *
- * Author: Steve Whitehouse <SteveW@ACM.org>
- * Mostly copied from the IPv4 routing code
- *
- *
- * Changes:
- *
- */
-#include <linux/string.h>
-#include <linux/net.h>
-#include <linux/socket.h>
-#include <linux/slab.h>
-#include <linux/sockios.h>
-#include <linux/init.h>
-#include <linux/skbuff.h>
-#include <linux/rtnetlink.h>
-#include <linux/proc_fs.h>
-#include <linux/netdevice.h>
-#include <linux/timer.h>
-#include <linux/spinlock.h>
-#include <linux/atomic.h>
-#include <linux/uaccess.h>
-#include <linux/route.h> /* RTF_xxx */
-#include <net/neighbour.h>
-#include <net/netlink.h>
-#include <net/tcp.h>
-#include <net/dst.h>
-#include <net/flow.h>
-#include <net/fib_rules.h>
-#include <net/dn.h>
-#include <net/dn_route.h>
-#include <net/dn_fib.h>
-#include <net/dn_neigh.h>
-#include <net/dn_dev.h>
-
-struct dn_zone
-{
- struct dn_zone *dz_next;
- struct dn_fib_node **dz_hash;
- int dz_nent;
- int dz_divisor;
- u32 dz_hashmask;
-#define DZ_HASHMASK(dz) ((dz)->dz_hashmask)
- int dz_order;
- __le16 dz_mask;
-#define DZ_MASK(dz) ((dz)->dz_mask)
-};
-
-struct dn_hash
-{
- struct dn_zone *dh_zones[17];
- struct dn_zone *dh_zone_list;
-};
-
-#define dz_key_0(key) ((key).datum = 0)
-
-#define for_nexthops(fi) { int nhsel; const struct dn_fib_nh *nh;\
- for(nhsel = 0, nh = (fi)->fib_nh; nhsel < (fi)->fib_nhs; nh++, nhsel++)
-
-#define endfor_nexthops(fi) }
-
-#define DN_MAX_DIVISOR 1024
-#define DN_S_ZOMBIE 1
-#define DN_S_ACCESSED 2
-
-#define DN_FIB_SCAN(f, fp) \
-for( ; ((f) = *(fp)) != NULL; (fp) = &(f)->fn_next)
-
-#define DN_FIB_SCAN_KEY(f, fp, key) \
-for( ; ((f) = *(fp)) != NULL && dn_key_eq((f)->fn_key, (key)); (fp) = &(f)->fn_next)
-
-#define RT_TABLE_MIN 1
-#define DN_FIB_TABLE_HASHSZ 256
-static struct hlist_head dn_fib_table_hash[DN_FIB_TABLE_HASHSZ];
-static DEFINE_RWLOCK(dn_fib_tables_lock);
-
-static struct kmem_cache *dn_hash_kmem __read_mostly;
-static int dn_fib_hash_zombies;
-
-static inline dn_fib_idx_t dn_hash(dn_fib_key_t key, struct dn_zone *dz)
-{
- u16 h = le16_to_cpu(key.datum)>>(16 - dz->dz_order);
- h ^= (h >> 10);
- h ^= (h >> 6);
- h &= DZ_HASHMASK(dz);
- return *(dn_fib_idx_t *)&h;
-}
-
-static inline dn_fib_key_t dz_key(__le16 dst, struct dn_zone *dz)
-{
- dn_fib_key_t k;
- k.datum = dst & DZ_MASK(dz);
- return k;
-}
-
-static inline struct dn_fib_node **dn_chain_p(dn_fib_key_t key, struct dn_zone *dz)
-{
- return &dz->dz_hash[dn_hash(key, dz).datum];
-}
-
-static inline struct dn_fib_node *dz_chain(dn_fib_key_t key, struct dn_zone *dz)
-{
- return dz->dz_hash[dn_hash(key, dz).datum];
-}
-
-static inline int dn_key_eq(dn_fib_key_t a, dn_fib_key_t b)
-{
- return a.datum == b.datum;
-}
-
-static inline int dn_key_leq(dn_fib_key_t a, dn_fib_key_t b)
-{
- return a.datum <= b.datum;
-}
-
-static inline void dn_rebuild_zone(struct dn_zone *dz,
- struct dn_fib_node **old_ht,
- int old_divisor)
-{
- struct dn_fib_node *f, **fp, *next;
- int i;
-
- for(i = 0; i < old_divisor; i++) {
- for(f = old_ht[i]; f; f = next) {
- next = f->fn_next;
- for(fp = dn_chain_p(f->fn_key, dz);
- *fp && dn_key_leq((*fp)->fn_key, f->fn_key);
- fp = &(*fp)->fn_next)
- /* NOTHING */;
- f->fn_next = *fp;
- *fp = f;
- }
- }
-}
-
-static void dn_rehash_zone(struct dn_zone *dz)
-{
- struct dn_fib_node **ht, **old_ht;
- int old_divisor, new_divisor;
- u32 new_hashmask;
-
- old_divisor = dz->dz_divisor;
-
- switch (old_divisor) {
- case 16:
- new_divisor = 256;
- new_hashmask = 0xFF;
- break;
- default:
- printk(KERN_DEBUG "DECnet: dn_rehash_zone: BUG! %d\n",
- old_divisor);
- fallthrough;
- case 256:
- new_divisor = 1024;
- new_hashmask = 0x3FF;
- break;
- }
-
- ht = kcalloc(new_divisor, sizeof(struct dn_fib_node*), GFP_KERNEL);
- if (ht == NULL)
- return;
-
- write_lock_bh(&dn_fib_tables_lock);
- old_ht = dz->dz_hash;
- dz->dz_hash = ht;
- dz->dz_hashmask = new_hashmask;
- dz->dz_divisor = new_divisor;
- dn_rebuild_zone(dz, old_ht, old_divisor);
- write_unlock_bh(&dn_fib_tables_lock);
- kfree(old_ht);
-}
-
-static void dn_free_node(struct dn_fib_node *f)
-{
- dn_fib_release_info(DN_FIB_INFO(f));
- kmem_cache_free(dn_hash_kmem, f);
-}
-
-
-static struct dn_zone *dn_new_zone(struct dn_hash *table, int z)
-{
- int i;
- struct dn_zone *dz = kzalloc(sizeof(struct dn_zone), GFP_KERNEL);
- if (!dz)
- return NULL;
-
- if (z) {
- dz->dz_divisor = 16;
- dz->dz_hashmask = 0x0F;
- } else {
- dz->dz_divisor = 1;
- dz->dz_hashmask = 0;
- }
-
- dz->dz_hash = kcalloc(dz->dz_divisor, sizeof(struct dn_fib_node *), GFP_KERNEL);
- if (!dz->dz_hash) {
- kfree(dz);
- return NULL;
- }
-
- dz->dz_order = z;
- dz->dz_mask = dnet_make_mask(z);
-
- for(i = z + 1; i <= 16; i++)
- if (table->dh_zones[i])
- break;
-
- write_lock_bh(&dn_fib_tables_lock);
- if (i>16) {
- dz->dz_next = table->dh_zone_list;
- table->dh_zone_list = dz;
- } else {
- dz->dz_next = table->dh_zones[i]->dz_next;
- table->dh_zones[i]->dz_next = dz;
- }
- table->dh_zones[z] = dz;
- write_unlock_bh(&dn_fib_tables_lock);
- return dz;
-}
-
-
-static int dn_fib_nh_match(struct rtmsg *r, struct nlmsghdr *nlh, struct nlattr *attrs[], struct dn_fib_info *fi)
-{
- struct rtnexthop *nhp;
- int nhlen;
-
- if (attrs[RTA_PRIORITY] &&
- nla_get_u32(attrs[RTA_PRIORITY]) != fi->fib_priority)
- return 1;
-
- if (attrs[RTA_OIF] || attrs[RTA_GATEWAY]) {
- if ((!attrs[RTA_OIF] || nla_get_u32(attrs[RTA_OIF]) == fi->fib_nh->nh_oif) &&
- (!attrs[RTA_GATEWAY] || nla_get_le16(attrs[RTA_GATEWAY]) != fi->fib_nh->nh_gw))
- return 0;
- return 1;
- }
-
- if (!attrs[RTA_MULTIPATH])
- return 0;
-
- nhp = nla_data(attrs[RTA_MULTIPATH]);
- nhlen = nla_len(attrs[RTA_MULTIPATH]);
-
- for_nexthops(fi) {
- int attrlen = nhlen - sizeof(struct rtnexthop);
- __le16 gw;
-
- if (attrlen < 0 || (nhlen -= nhp->rtnh_len) < 0)
- return -EINVAL;
- if (nhp->rtnh_ifindex && nhp->rtnh_ifindex != nh->nh_oif)
- return 1;
- if (attrlen) {
- struct nlattr *gw_attr;
-
- gw_attr = nla_find((struct nlattr *) (nhp + 1), attrlen, RTA_GATEWAY);
- gw = gw_attr ? nla_get_le16(gw_attr) : 0;
-
- if (gw && gw != nh->nh_gw)
- return 1;
- }
- nhp = RTNH_NEXT(nhp);
- } endfor_nexthops(fi);
-
- return 0;
-}
-
-static inline size_t dn_fib_nlmsg_size(struct dn_fib_info *fi)
-{
- size_t payload = NLMSG_ALIGN(sizeof(struct rtmsg))
- + nla_total_size(4) /* RTA_TABLE */
- + nla_total_size(2) /* RTA_DST */
- + nla_total_size(4) /* RTA_PRIORITY */
- + nla_total_size(TCP_CA_NAME_MAX); /* RTAX_CC_ALGO */
-
- /* space for nested metrics */
- payload += nla_total_size((RTAX_MAX * nla_total_size(4)));
-
- if (fi->fib_nhs) {
- /* Also handles the special case fib_nhs == 1 */
-
- /* each nexthop is packed in an attribute */
- size_t nhsize = nla_total_size(sizeof(struct rtnexthop));
-
- /* may contain a gateway attribute */
- nhsize += nla_total_size(4);
-
- /* all nexthops are packed in a nested attribute */
- payload += nla_total_size(fi->fib_nhs * nhsize);
- }
-
- return payload;
-}
-
-static int dn_fib_dump_info(struct sk_buff *skb, u32 portid, u32 seq, int event,
- u32 tb_id, u8 type, u8 scope, void *dst, int dst_len,
- struct dn_fib_info *fi, unsigned int flags)
-{
- struct rtmsg *rtm;
- struct nlmsghdr *nlh;
-
- nlh = nlmsg_put(skb, portid, seq, event, sizeof(*rtm), flags);
- if (!nlh)
- return -EMSGSIZE;
-
- rtm = nlmsg_data(nlh);
- rtm->rtm_family = AF_DECnet;
- rtm->rtm_dst_len = dst_len;
- rtm->rtm_src_len = 0;
- rtm->rtm_tos = 0;
- rtm->rtm_table = tb_id;
- rtm->rtm_flags = fi->fib_flags;
- rtm->rtm_scope = scope;
- rtm->rtm_type = type;
- rtm->rtm_protocol = fi->fib_protocol;
-
- if (nla_put_u32(skb, RTA_TABLE, tb_id) < 0)
- goto errout;
-
- if (rtm->rtm_dst_len &&
- nla_put(skb, RTA_DST, 2, dst) < 0)
- goto errout;
-
- if (fi->fib_priority &&
- nla_put_u32(skb, RTA_PRIORITY, fi->fib_priority) < 0)
- goto errout;
-
- if (rtnetlink_put_metrics(skb, fi->fib_metrics) < 0)
- goto errout;
-
- if (fi->fib_nhs == 1) {
- if (fi->fib_nh->nh_gw &&
- nla_put_le16(skb, RTA_GATEWAY, fi->fib_nh->nh_gw) < 0)
- goto errout;
-
- if (fi->fib_nh->nh_oif &&
- nla_put_u32(skb, RTA_OIF, fi->fib_nh->nh_oif) < 0)
- goto errout;
- }
-
- if (fi->fib_nhs > 1) {
- struct rtnexthop *nhp;
- struct nlattr *mp_head;
-
- mp_head = nla_nest_start_noflag(skb, RTA_MULTIPATH);
- if (!mp_head)
- goto errout;
-
- for_nexthops(fi) {
- if (!(nhp = nla_reserve_nohdr(skb, sizeof(*nhp))))
- goto errout;
-
- nhp->rtnh_flags = nh->nh_flags & 0xFF;
- nhp->rtnh_hops = nh->nh_weight - 1;
- nhp->rtnh_ifindex = nh->nh_oif;
-
- if (nh->nh_gw &&
- nla_put_le16(skb, RTA_GATEWAY, nh->nh_gw) < 0)
- goto errout;
-
- nhp->rtnh_len = skb_tail_pointer(skb) - (unsigned char *)nhp;
- } endfor_nexthops(fi);
-
- nla_nest_end(skb, mp_head);
- }
-
- nlmsg_end(skb, nlh);
- return 0;
-
-errout:
- nlmsg_cancel(skb, nlh);
- return -EMSGSIZE;
-}
-
-
-static void dn_rtmsg_fib(int event, struct dn_fib_node *f, int z, u32 tb_id,
- struct nlmsghdr *nlh, struct netlink_skb_parms *req)
-{
- struct sk_buff *skb;
- u32 portid = req ? req->portid : 0;
- int err = -ENOBUFS;
-
- skb = nlmsg_new(dn_fib_nlmsg_size(DN_FIB_INFO(f)), GFP_KERNEL);
- if (skb == NULL)
- goto errout;
-
- err = dn_fib_dump_info(skb, portid, nlh->nlmsg_seq, event, tb_id,
- f->fn_type, f->fn_scope, &f->fn_key, z,
- DN_FIB_INFO(f), 0);
- if (err < 0) {
- /* -EMSGSIZE implies BUG in dn_fib_nlmsg_size() */
- WARN_ON(err == -EMSGSIZE);
- kfree_skb(skb);
- goto errout;
- }
- rtnl_notify(skb, &init_net, portid, RTNLGRP_DECnet_ROUTE, nlh, GFP_KERNEL);
- return;
-errout:
- if (err < 0)
- rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_ROUTE, err);
-}
-
-static __inline__ int dn_hash_dump_bucket(struct sk_buff *skb,
- struct netlink_callback *cb,
- struct dn_fib_table *tb,
- struct dn_zone *dz,
- struct dn_fib_node *f)
-{
- int i, s_i;
-
- s_i = cb->args[4];
- for(i = 0; f; i++, f = f->fn_next) {
- if (i < s_i)
- continue;
- if (f->fn_state & DN_S_ZOMBIE)
- continue;
- if (dn_fib_dump_info(skb, NETLINK_CB(cb->skb).portid,
- cb->nlh->nlmsg_seq,
- RTM_NEWROUTE,
- tb->n,
- (f->fn_state & DN_S_ZOMBIE) ? 0 : f->fn_type,
- f->fn_scope, &f->fn_key, dz->dz_order,
- f->fn_info, NLM_F_MULTI) < 0) {
- cb->args[4] = i;
- return -1;
- }
- }
- cb->args[4] = i;
- return skb->len;
-}
-
-static __inline__ int dn_hash_dump_zone(struct sk_buff *skb,
- struct netlink_callback *cb,
- struct dn_fib_table *tb,
- struct dn_zone *dz)
-{
- int h, s_h;
-
- s_h = cb->args[3];
- for(h = 0; h < dz->dz_divisor; h++) {
- if (h < s_h)
- continue;
- if (h > s_h)
- memset(&cb->args[4], 0, sizeof(cb->args) - 4*sizeof(cb->args[0]));
- if (dz->dz_hash == NULL || dz->dz_hash[h] == NULL)
- continue;
- if (dn_hash_dump_bucket(skb, cb, tb, dz, dz->dz_hash[h]) < 0) {
- cb->args[3] = h;
- return -1;
- }
- }
- cb->args[3] = h;
- return skb->len;
-}
-
-static int dn_fib_table_dump(struct dn_fib_table *tb, struct sk_buff *skb,
- struct netlink_callback *cb)
-{
- int m, s_m;
- struct dn_zone *dz;
- struct dn_hash *table = (struct dn_hash *)tb->data;
-
- s_m = cb->args[2];
- read_lock(&dn_fib_tables_lock);
- for(dz = table->dh_zone_list, m = 0; dz; dz = dz->dz_next, m++) {
- if (m < s_m)
- continue;
- if (m > s_m)
- memset(&cb->args[3], 0, sizeof(cb->args) - 3*sizeof(cb->args[0]));
-
- if (dn_hash_dump_zone(skb, cb, tb, dz) < 0) {
- cb->args[2] = m;
- read_unlock(&dn_fib_tables_lock);
- return -1;
- }
- }
- read_unlock(&dn_fib_tables_lock);
- cb->args[2] = m;
-
- return skb->len;
-}
-
-int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb)
-{
- struct net *net = sock_net(skb->sk);
- unsigned int h, s_h;
- unsigned int e = 0, s_e;
- struct dn_fib_table *tb;
- int dumped = 0;
-
- if (!net_eq(net, &init_net))
- return 0;
-
- if (nlmsg_len(cb->nlh) >= sizeof(struct rtmsg) &&
- ((struct rtmsg *)nlmsg_data(cb->nlh))->rtm_flags&RTM_F_CLONED)
- return dn_cache_dump(skb, cb);
-
- s_h = cb->args[0];
- s_e = cb->args[1];
-
- for (h = s_h; h < DN_FIB_TABLE_HASHSZ; h++, s_h = 0) {
- e = 0;
- hlist_for_each_entry(tb, &dn_fib_table_hash[h], hlist) {
- if (e < s_e)
- goto next;
- if (dumped)
- memset(&cb->args[2], 0, sizeof(cb->args) -
- 2 * sizeof(cb->args[0]));
- if (tb->dump(tb, skb, cb) < 0)
- goto out;
- dumped = 1;
-next:
- e++;
- }
- }
-out:
- cb->args[1] = e;
- cb->args[0] = h;
-
- return skb->len;
-}
-
-static int dn_fib_table_insert(struct dn_fib_table *tb, struct rtmsg *r, struct nlattr *attrs[],
- struct nlmsghdr *n, struct netlink_skb_parms *req)
-{
- struct dn_hash *table = (struct dn_hash *)tb->data;
- struct dn_fib_node *new_f, *f, **fp, **del_fp;
- struct dn_zone *dz;
- struct dn_fib_info *fi;
- int z = r->rtm_dst_len;
- int type = r->rtm_type;
- dn_fib_key_t key;
- int err;
-
- if (z > 16)
- return -EINVAL;
-
- dz = table->dh_zones[z];
- if (!dz && !(dz = dn_new_zone(table, z)))
- return -ENOBUFS;
-
- dz_key_0(key);
- if (attrs[RTA_DST]) {
- __le16 dst = nla_get_le16(attrs[RTA_DST]);
- if (dst & ~DZ_MASK(dz))
- return -EINVAL;
- key = dz_key(dst, dz);
- }
-
- if ((fi = dn_fib_create_info(r, attrs, n, &err)) == NULL)
- return err;
-
- if (dz->dz_nent > (dz->dz_divisor << 2) &&
- dz->dz_divisor > DN_MAX_DIVISOR &&
- (z==16 || (1<<z) > dz->dz_divisor))
- dn_rehash_zone(dz);
-
- fp = dn_chain_p(key, dz);
-
- DN_FIB_SCAN(f, fp) {
- if (dn_key_leq(key, f->fn_key))
- break;
- }
-
- del_fp = NULL;
-
- if (f && (f->fn_state & DN_S_ZOMBIE) &&
- dn_key_eq(f->fn_key, key)) {
- del_fp = fp;
- fp = &f->fn_next;
- f = *fp;
- goto create;
- }
-
- DN_FIB_SCAN_KEY(f, fp, key) {
- if (fi->fib_priority <= DN_FIB_INFO(f)->fib_priority)
- break;
- }
-
- if (f && dn_key_eq(f->fn_key, key) &&
- fi->fib_priority == DN_FIB_INFO(f)->fib_priority) {
- struct dn_fib_node **ins_fp;
-
- err = -EEXIST;
- if (n->nlmsg_flags & NLM_F_EXCL)
- goto out;
-
- if (n->nlmsg_flags & NLM_F_REPLACE) {
- del_fp = fp;
- fp = &f->fn_next;
- f = *fp;
- goto replace;
- }
-
- ins_fp = fp;
- err = -EEXIST;
-
- DN_FIB_SCAN_KEY(f, fp, key) {
- if (fi->fib_priority != DN_FIB_INFO(f)->fib_priority)
- break;
- if (f->fn_type == type &&
- f->fn_scope == r->rtm_scope &&
- DN_FIB_INFO(f) == fi)
- goto out;
- }
-
- if (!(n->nlmsg_flags & NLM_F_APPEND)) {
- fp = ins_fp;
- f = *fp;
- }
- }
-
-create:
- err = -ENOENT;
- if (!(n->nlmsg_flags & NLM_F_CREATE))
- goto out;
-
-replace:
- err = -ENOBUFS;
- new_f = kmem_cache_zalloc(dn_hash_kmem, GFP_KERNEL);
- if (new_f == NULL)
- goto out;
-
- new_f->fn_key = key;
- new_f->fn_type = type;
- new_f->fn_scope = r->rtm_scope;
- DN_FIB_INFO(new_f) = fi;
-
- new_f->fn_next = f;
- write_lock_bh(&dn_fib_tables_lock);
- *fp = new_f;
- write_unlock_bh(&dn_fib_tables_lock);
- dz->dz_nent++;
-
- if (del_fp) {
- f = *del_fp;
- write_lock_bh(&dn_fib_tables_lock);
- *del_fp = f->fn_next;
- write_unlock_bh(&dn_fib_tables_lock);
-
- if (!(f->fn_state & DN_S_ZOMBIE))
- dn_rtmsg_fib(RTM_DELROUTE, f, z, tb->n, n, req);
- if (f->fn_state & DN_S_ACCESSED)
- dn_rt_cache_flush(-1);
- dn_free_node(f);
- dz->dz_nent--;
- } else {
- dn_rt_cache_flush(-1);
- }
-
- dn_rtmsg_fib(RTM_NEWROUTE, new_f, z, tb->n, n, req);
-
- return 0;
-out:
- dn_fib_release_info(fi);
- return err;
-}
-
-
-static int dn_fib_table_delete(struct dn_fib_table *tb, struct rtmsg *r, struct nlattr *attrs[],
- struct nlmsghdr *n, struct netlink_skb_parms *req)
-{
- struct dn_hash *table = (struct dn_hash*)tb->data;
- struct dn_fib_node **fp, **del_fp, *f;
- int z = r->rtm_dst_len;
- struct dn_zone *dz;
- dn_fib_key_t key;
- int matched;
-
-
- if (z > 16)
- return -EINVAL;
-
- if ((dz = table->dh_zones[z]) == NULL)
- return -ESRCH;
-
- dz_key_0(key);
- if (attrs[RTA_DST]) {
- __le16 dst = nla_get_le16(attrs[RTA_DST]);
- if (dst & ~DZ_MASK(dz))
- return -EINVAL;
- key = dz_key(dst, dz);
- }
-
- fp = dn_chain_p(key, dz);
-
- DN_FIB_SCAN(f, fp) {
- if (dn_key_eq(f->fn_key, key))
- break;
- if (dn_key_leq(key, f->fn_key))
- return -ESRCH;
- }
-
- matched = 0;
- del_fp = NULL;
- DN_FIB_SCAN_KEY(f, fp, key) {
- struct dn_fib_info *fi = DN_FIB_INFO(f);
-
- if (f->fn_state & DN_S_ZOMBIE)
- return -ESRCH;
-
- matched++;
-
- if (del_fp == NULL &&
- (!r->rtm_type || f->fn_type == r->rtm_type) &&
- (r->rtm_scope == RT_SCOPE_NOWHERE || f->fn_scope == r->rtm_scope) &&
- (!r->rtm_protocol ||
- fi->fib_protocol == r->rtm_protocol) &&
- dn_fib_nh_match(r, n, attrs, fi) == 0)
- del_fp = fp;
- }
-
- if (del_fp) {
- f = *del_fp;
- dn_rtmsg_fib(RTM_DELROUTE, f, z, tb->n, n, req);
-
- if (matched != 1) {
- write_lock_bh(&dn_fib_tables_lock);
- *del_fp = f->fn_next;
- write_unlock_bh(&dn_fib_tables_lock);
-
- if (f->fn_state & DN_S_ACCESSED)
- dn_rt_cache_flush(-1);
- dn_free_node(f);
- dz->dz_nent--;
- } else {
- f->fn_state |= DN_S_ZOMBIE;
- if (f->fn_state & DN_S_ACCESSED) {
- f->fn_state &= ~DN_S_ACCESSED;
- dn_rt_cache_flush(-1);
- }
- if (++dn_fib_hash_zombies > 128)
- dn_fib_flush();
- }
-
- return 0;
- }
-
- return -ESRCH;
-}
-
-static inline int dn_flush_list(struct dn_fib_node **fp, int z, struct dn_hash *table)
-{
- int found = 0;
- struct dn_fib_node *f;
-
- while((f = *fp) != NULL) {
- struct dn_fib_info *fi = DN_FIB_INFO(f);
-
- if (fi && ((f->fn_state & DN_S_ZOMBIE) || (fi->fib_flags & RTNH_F_DEAD))) {
- write_lock_bh(&dn_fib_tables_lock);
- *fp = f->fn_next;
- write_unlock_bh(&dn_fib_tables_lock);
-
- dn_free_node(f);
- found++;
- continue;
- }
- fp = &f->fn_next;
- }
-
- return found;
-}
-
-static int dn_fib_table_flush(struct dn_fib_table *tb)
-{
- struct dn_hash *table = (struct dn_hash *)tb->data;
- struct dn_zone *dz;
- int found = 0;
-
- dn_fib_hash_zombies = 0;
- for(dz = table->dh_zone_list; dz; dz = dz->dz_next) {
- int i;
- int tmp = 0;
- for(i = dz->dz_divisor-1; i >= 0; i--)
- tmp += dn_flush_list(&dz->dz_hash[i], dz->dz_order, table);
- dz->dz_nent -= tmp;
- found += tmp;
- }
-
- return found;
-}
-
-static int dn_fib_table_lookup(struct dn_fib_table *tb, const struct flowidn *flp, struct dn_fib_res *res)
-{
- int err;
- struct dn_zone *dz;
- struct dn_hash *t = (struct dn_hash *)tb->data;
-
- read_lock(&dn_fib_tables_lock);
- for(dz = t->dh_zone_list; dz; dz = dz->dz_next) {
- struct dn_fib_node *f;
- dn_fib_key_t k = dz_key(flp->daddr, dz);
-
- for(f = dz_chain(k, dz); f; f = f->fn_next) {
- if (!dn_key_eq(k, f->fn_key)) {
- if (dn_key_leq(k, f->fn_key))
- break;
- else
- continue;
- }
-
- f->fn_state |= DN_S_ACCESSED;
-
- if (f->fn_state&DN_S_ZOMBIE)
- continue;
-
- if (f->fn_scope < flp->flowidn_scope)
- continue;
-
- err = dn_fib_semantic_match(f->fn_type, DN_FIB_INFO(f), flp, res);
-
- if (err == 0) {
- res->type = f->fn_type;
- res->scope = f->fn_scope;
- res->prefixlen = dz->dz_order;
- goto out;
- }
- if (err < 0)
- goto out;
- }
- }
- err = 1;
-out:
- read_unlock(&dn_fib_tables_lock);
- return err;
-}
-
-
-struct dn_fib_table *dn_fib_get_table(u32 n, int create)
-{
- struct dn_fib_table *t;
- unsigned int h;
-
- if (n < RT_TABLE_MIN)
- return NULL;
-
- if (n > RT_TABLE_MAX)
- return NULL;
-
- h = n & (DN_FIB_TABLE_HASHSZ - 1);
- rcu_read_lock();
- hlist_for_each_entry_rcu(t, &dn_fib_table_hash[h], hlist) {
- if (t->n == n) {
- rcu_read_unlock();
- return t;
- }
- }
- rcu_read_unlock();
-
- if (!create)
- return NULL;
-
- if (in_interrupt()) {
- net_dbg_ratelimited("DECnet: BUG! Attempt to create routing table from interrupt\n");
- return NULL;
- }
-
- t = kzalloc(sizeof(struct dn_fib_table) + sizeof(struct dn_hash),
- GFP_KERNEL);
- if (t == NULL)
- return NULL;
-
- t->n = n;
- t->insert = dn_fib_table_insert;
- t->delete = dn_fib_table_delete;
- t->lookup = dn_fib_table_lookup;
- t->flush = dn_fib_table_flush;
- t->dump = dn_fib_table_dump;
- hlist_add_head_rcu(&t->hlist, &dn_fib_table_hash[h]);
-
- return t;
-}
-
-struct dn_fib_table *dn_fib_empty_table(void)
-{
- u32 id;
-
- for(id = RT_TABLE_MIN; id <= RT_TABLE_MAX; id++)
- if (dn_fib_get_table(id, 0) == NULL)
- return dn_fib_get_table(id, 1);
- return NULL;
-}
-
-void dn_fib_flush(void)
-{
- int flushed = 0;
- struct dn_fib_table *tb;
- unsigned int h;
-
- for (h = 0; h < DN_FIB_TABLE_HASHSZ; h++) {
- hlist_for_each_entry(tb, &dn_fib_table_hash[h], hlist)
- flushed += tb->flush(tb);
- }
-
- if (flushed)
- dn_rt_cache_flush(-1);
-}
-
-void __init dn_fib_table_init(void)
-{
- dn_hash_kmem = kmem_cache_create("dn_fib_info_cache",
- sizeof(struct dn_fib_info),
- 0, SLAB_HWCACHE_ALIGN,
- NULL);
-}
-
-void __exit dn_fib_table_cleanup(void)
-{
- struct dn_fib_table *t;
- struct hlist_node *next;
- unsigned int h;
-
- write_lock(&dn_fib_tables_lock);
- for (h = 0; h < DN_FIB_TABLE_HASHSZ; h++) {
- hlist_for_each_entry_safe(t, next, &dn_fib_table_hash[h],
- hlist) {
- hlist_del(&t->hlist);
- kfree(t);
- }
- }
- write_unlock(&dn_fib_tables_lock);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * DECnet An implementation of the DECnet protocol suite for the LINUX
- * operating system. DECnet is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * DECnet Socket Timer Functions
- *
- * Author: Steve Whitehouse <SteveW@ACM.org>
- *
- *
- * Changes:
- * Steve Whitehouse : Made keepalive timer part of the same
- * timer idea.
- * Steve Whitehouse : Added checks for sk->sock_readers
- * David S. Miller : New socket locking
- * Steve Whitehouse : Timer grabs socket ref.
- */
-#include <linux/net.h>
-#include <linux/socket.h>
-#include <linux/skbuff.h>
-#include <linux/netdevice.h>
-#include <linux/timer.h>
-#include <linux/spinlock.h>
-#include <net/sock.h>
-#include <linux/atomic.h>
-#include <linux/jiffies.h>
-#include <net/flow.h>
-#include <net/dn.h>
-
-/*
- * Slow timer is for everything else (n * 500mS)
- */
-
-#define SLOW_INTERVAL (HZ/2)
-
-static void dn_slow_timer(struct timer_list *t);
-
-void dn_start_slow_timer(struct sock *sk)
-{
- timer_setup(&sk->sk_timer, dn_slow_timer, 0);
- sk_reset_timer(sk, &sk->sk_timer, jiffies + SLOW_INTERVAL);
-}
-
-void dn_stop_slow_timer(struct sock *sk)
-{
- sk_stop_timer(sk, &sk->sk_timer);
-}
-
-static void dn_slow_timer(struct timer_list *t)
-{
- struct sock *sk = from_timer(sk, t, sk_timer);
- struct dn_scp *scp = DN_SK(sk);
-
- bh_lock_sock(sk);
-
- if (sock_owned_by_user(sk)) {
- sk_reset_timer(sk, &sk->sk_timer, jiffies + HZ / 10);
- goto out;
- }
-
- /*
- * The persist timer is the standard slow timer used for retransmits
- * in both connection establishment and disconnection as well as
- * in the RUN state. The different states are catered for by changing
- * the function pointer in the socket. Setting the timer to a value
- * of zero turns it off. We allow the persist_fxn to turn the
- * timer off in a permant way by returning non-zero, so that
- * timer based routines may remove sockets. This is why we have a
- * sock_hold()/sock_put() around the timer to prevent the socket
- * going away in the middle.
- */
- if (scp->persist && scp->persist_fxn) {
- if (scp->persist <= SLOW_INTERVAL) {
- scp->persist = 0;
-
- if (scp->persist_fxn(sk))
- goto out;
- } else {
- scp->persist -= SLOW_INTERVAL;
- }
- }
-
- /*
- * Check for keepalive timeout. After the other timer 'cos if
- * the previous timer caused a retransmit, we don't need to
- * do this. scp->stamp is the last time that we sent a packet.
- * The keepalive function sends a link service packet to the
- * other end. If it remains unacknowledged, the standard
- * socket timers will eventually shut the socket down. Each
- * time we do this, scp->stamp will be updated, thus
- * we won't try and send another until scp->keepalive has passed
- * since the last successful transmission.
- */
- if (scp->keepalive && scp->keepalive_fxn && (scp->state == DN_RUN)) {
- if (time_after_eq(jiffies, scp->stamp + scp->keepalive))
- scp->keepalive_fxn(sk);
- }
-
- sk_reset_timer(sk, &sk->sk_timer, jiffies + SLOW_INTERVAL);
-out:
- bh_unlock_sock(sk);
- sock_put(sk);
-}
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# DECnet netfilter configuration
-#
-
-menu "DECnet: Netfilter Configuration"
- depends on DECNET && NETFILTER
- depends on NETFILTER_ADVANCED
-
-config DECNET_NF_GRABULATOR
- tristate "Routing message grabulator (for userland routing daemon)"
- help
- Enable this module if you want to use the userland DECnet routing
- daemon. You will also need to enable routing support for DECnet
- unless you just want to monitor routing messages from other nodes.
-
-endmenu
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Makefile for DECnet netfilter modules
-#
-
-obj-$(CONFIG_DECNET_NF_GRABULATOR) += dn_rtmsg.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * DECnet An implementation of the DECnet protocol suite for the LINUX
- * operating system. DECnet is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * DECnet Routing Message Grabulator
- *
- * (C) 2000 ChyGwyn Limited - https://www.chygwyn.com/
- *
- * Author: Steven Whitehouse <steve@chygwyn.com>
- */
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/netdevice.h>
-#include <linux/netfilter.h>
-#include <linux/spinlock.h>
-#include <net/netlink.h>
-#include <linux/netfilter_decnet.h>
-
-#include <net/sock.h>
-#include <net/flow.h>
-#include <net/dn.h>
-#include <net/dn_route.h>
-
-static struct sock *dnrmg = NULL;
-
-
-static struct sk_buff *dnrmg_build_message(struct sk_buff *rt_skb, int *errp)
-{
- struct sk_buff *skb = NULL;
- size_t size;
- sk_buff_data_t old_tail;
- struct nlmsghdr *nlh;
- unsigned char *ptr;
- struct nf_dn_rtmsg *rtm;
-
- size = NLMSG_ALIGN(rt_skb->len) +
- NLMSG_ALIGN(sizeof(struct nf_dn_rtmsg));
- skb = nlmsg_new(size, GFP_ATOMIC);
- if (!skb) {
- *errp = -ENOMEM;
- return NULL;
- }
- old_tail = skb->tail;
- nlh = nlmsg_put(skb, 0, 0, 0, size, 0);
- if (!nlh) {
- kfree_skb(skb);
- *errp = -ENOMEM;
- return NULL;
- }
- rtm = (struct nf_dn_rtmsg *)nlmsg_data(nlh);
- rtm->nfdn_ifindex = rt_skb->dev->ifindex;
- ptr = NFDN_RTMSG(rtm);
- skb_copy_from_linear_data(rt_skb, ptr, rt_skb->len);
- nlh->nlmsg_len = skb->tail - old_tail;
- return skb;
-}
-
-static void dnrmg_send_peer(struct sk_buff *skb)
-{
- struct sk_buff *skb2;
- int status = 0;
- int group = 0;
- unsigned char flags = *skb->data;
-
- switch (flags & DN_RT_CNTL_MSK) {
- case DN_RT_PKT_L1RT:
- group = DNRNG_NLGRP_L1;
- break;
- case DN_RT_PKT_L2RT:
- group = DNRNG_NLGRP_L2;
- break;
- default:
- return;
- }
-
- skb2 = dnrmg_build_message(skb, &status);
- if (skb2 == NULL)
- return;
- NETLINK_CB(skb2).dst_group = group;
- netlink_broadcast(dnrmg, skb2, 0, group, GFP_ATOMIC);
-}
-
-
-static unsigned int dnrmg_hook(void *priv,
- struct sk_buff *skb,
- const struct nf_hook_state *state)
-{
- dnrmg_send_peer(skb);
- return NF_ACCEPT;
-}
-
-
-#define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err), NULL); return; } while (0)
-
-static inline void dnrmg_receive_user_skb(struct sk_buff *skb)
-{
- struct nlmsghdr *nlh = nlmsg_hdr(skb);
-
- if (skb->len < sizeof(*nlh) ||
- nlh->nlmsg_len < sizeof(*nlh) ||
- skb->len < nlh->nlmsg_len)
- return;
-
- if (!netlink_capable(skb, CAP_NET_ADMIN))
- RCV_SKB_FAIL(-EPERM);
-
- /* Eventually we might send routing messages too */
-
- RCV_SKB_FAIL(-EINVAL);
-}
-
-static const struct nf_hook_ops dnrmg_ops = {
- .hook = dnrmg_hook,
- .pf = NFPROTO_DECNET,
- .hooknum = NF_DN_ROUTE,
- .priority = NF_DN_PRI_DNRTMSG,
-};
-
-static int __init dn_rtmsg_init(void)
-{
- int rv = 0;
- struct netlink_kernel_cfg cfg = {
- .groups = DNRNG_NLGRP_MAX,
- .input = dnrmg_receive_user_skb,
- };
-
- dnrmg = netlink_kernel_create(&init_net, NETLINK_DNRTMSG, &cfg);
- if (dnrmg == NULL) {
- printk(KERN_ERR "dn_rtmsg: Cannot create netlink socket");
- return -ENOMEM;
- }
-
- rv = nf_register_net_hook(&init_net, &dnrmg_ops);
- if (rv) {
- netlink_kernel_release(dnrmg);
- }
-
- return rv;
-}
-
-static void __exit dn_rtmsg_fini(void)
-{
- nf_unregister_net_hook(&init_net, &dnrmg_ops);
- netlink_kernel_release(dnrmg);
-}
-
-
-MODULE_DESCRIPTION("DECnet Routing Message Grabulator");
-MODULE_AUTHOR("Steven Whitehouse <steve@chygwyn.com>");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_DNRTMSG);
-
-module_init(dn_rtmsg_init);
-module_exit(dn_rtmsg_fini);
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * DECnet An implementation of the DECnet protocol suite for the LINUX
- * operating system. DECnet is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * DECnet sysctl support functions
- *
- * Author: Steve Whitehouse <SteveW@ACM.org>
- *
- *
- * Changes:
- * Steve Whitehouse - C99 changes and default device handling
- * Steve Whitehouse - Memory buffer settings, like the tcp ones
- *
- */
-#include <linux/mm.h>
-#include <linux/sysctl.h>
-#include <linux/fs.h>
-#include <linux/netdevice.h>
-#include <linux/string.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/flow.h>
-
-#include <linux/uaccess.h>
-
-#include <net/dn.h>
-#include <net/dn_dev.h>
-#include <net/dn_route.h>
-
-
-int decnet_debug_level;
-int decnet_time_wait = 30;
-int decnet_dn_count = 1;
-int decnet_di_count = 3;
-int decnet_dr_count = 3;
-int decnet_log_martians = 1;
-int decnet_no_fc_max_cwnd = NSP_MIN_WINDOW;
-
-/* Reasonable defaults, I hope, based on tcp's defaults */
-long sysctl_decnet_mem[3] = { 768 << 3, 1024 << 3, 1536 << 3 };
-int sysctl_decnet_wmem[3] = { 4 * 1024, 16 * 1024, 128 * 1024 };
-int sysctl_decnet_rmem[3] = { 4 * 1024, 87380, 87380 * 2 };
-
-#ifdef CONFIG_SYSCTL
-extern int decnet_dst_gc_interval;
-static int min_decnet_time_wait[] = { 5 };
-static int max_decnet_time_wait[] = { 600 };
-static int min_state_count[] = { 1 };
-static int max_state_count[] = { NSP_MAXRXTSHIFT };
-static int min_decnet_dst_gc_interval[] = { 1 };
-static int max_decnet_dst_gc_interval[] = { 60 };
-static int min_decnet_no_fc_max_cwnd[] = { NSP_MIN_WINDOW };
-static int max_decnet_no_fc_max_cwnd[] = { NSP_MAX_WINDOW };
-static char node_name[7] = "???";
-
-static struct ctl_table_header *dn_table_header = NULL;
-
-/*
- * ctype.h :-)
- */
-#define ISNUM(x) (((x) >= '0') && ((x) <= '9'))
-#define ISLOWER(x) (((x) >= 'a') && ((x) <= 'z'))
-#define ISUPPER(x) (((x) >= 'A') && ((x) <= 'Z'))
-#define ISALPHA(x) (ISLOWER(x) || ISUPPER(x))
-#define INVALID_END_CHAR(x) (ISNUM(x) || ISALPHA(x))
-
-static void strip_it(char *str)
-{
- for(;;) {
- switch (*str) {
- case ' ':
- case '\n':
- case '\r':
- case ':':
- *str = 0;
- fallthrough;
- case 0:
- return;
- }
- str++;
- }
-}
-
-/*
- * Simple routine to parse an ascii DECnet address
- * into a network order address.
- */
-static int parse_addr(__le16 *addr, char *str)
-{
- __u16 area, node;
-
- while(*str && !ISNUM(*str)) str++;
-
- if (*str == 0)
- return -1;
-
- area = (*str++ - '0');
- if (ISNUM(*str)) {
- area *= 10;
- area += (*str++ - '0');
- }
-
- if (*str++ != '.')
- return -1;
-
- if (!ISNUM(*str))
- return -1;
-
- node = *str++ - '0';
- if (ISNUM(*str)) {
- node *= 10;
- node += (*str++ - '0');
- }
- if (ISNUM(*str)) {
- node *= 10;
- node += (*str++ - '0');
- }
- if (ISNUM(*str)) {
- node *= 10;
- node += (*str++ - '0');
- }
-
- if ((node > 1023) || (area > 63))
- return -1;
-
- if (INVALID_END_CHAR(*str))
- return -1;
-
- *addr = cpu_to_le16((area << 10) | node);
-
- return 0;
-}
-
-static int dn_node_address_handler(struct ctl_table *table, int write,
- void *buffer, size_t *lenp, loff_t *ppos)
-{
- char addr[DN_ASCBUF_LEN];
- size_t len;
- __le16 dnaddr;
-
- if (!*lenp || (*ppos && !write)) {
- *lenp = 0;
- return 0;
- }
-
- if (write) {
- len = (*lenp < DN_ASCBUF_LEN) ? *lenp : (DN_ASCBUF_LEN-1);
- memcpy(addr, buffer, len);
- addr[len] = 0;
- strip_it(addr);
-
- if (parse_addr(&dnaddr, addr))
- return -EINVAL;
-
- dn_dev_devices_off();
-
- decnet_address = dnaddr;
-
- dn_dev_devices_on();
-
- *ppos += len;
-
- return 0;
- }
-
- dn_addr2asc(le16_to_cpu(decnet_address), addr);
- len = strlen(addr);
- addr[len++] = '\n';
-
- if (len > *lenp)
- len = *lenp;
- memcpy(buffer, addr, len);
- *lenp = len;
- *ppos += len;
-
- return 0;
-}
-
-static int dn_def_dev_handler(struct ctl_table *table, int write,
- void *buffer, size_t *lenp, loff_t *ppos)
-{
- size_t len;
- struct net_device *dev;
- char devname[17];
-
- if (!*lenp || (*ppos && !write)) {
- *lenp = 0;
- return 0;
- }
-
- if (write) {
- if (*lenp > 16)
- return -E2BIG;
-
- memcpy(devname, buffer, *lenp);
- devname[*lenp] = 0;
- strip_it(devname);
-
- dev = dev_get_by_name(&init_net, devname);
- if (dev == NULL)
- return -ENODEV;
-
- if (dev->dn_ptr == NULL) {
- dev_put(dev);
- return -ENODEV;
- }
-
- if (dn_dev_set_default(dev, 1)) {
- dev_put(dev);
- return -ENODEV;
- }
- *ppos += *lenp;
-
- return 0;
- }
-
- dev = dn_dev_get_default();
- if (dev == NULL) {
- *lenp = 0;
- return 0;
- }
-
- strcpy(devname, dev->name);
- dev_put(dev);
- len = strlen(devname);
- devname[len++] = '\n';
-
- if (len > *lenp) len = *lenp;
-
- memcpy(buffer, devname, len);
- *lenp = len;
- *ppos += len;
-
- return 0;
-}
-
-static struct ctl_table dn_table[] = {
- {
- .procname = "node_address",
- .maxlen = 7,
- .mode = 0644,
- .proc_handler = dn_node_address_handler,
- },
- {
- .procname = "node_name",
- .data = node_name,
- .maxlen = 7,
- .mode = 0644,
- .proc_handler = proc_dostring,
- },
- {
- .procname = "default_device",
- .maxlen = 16,
- .mode = 0644,
- .proc_handler = dn_def_dev_handler,
- },
- {
- .procname = "time_wait",
- .data = &decnet_time_wait,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_decnet_time_wait,
- .extra2 = &max_decnet_time_wait
- },
- {
- .procname = "dn_count",
- .data = &decnet_dn_count,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_state_count,
- .extra2 = &max_state_count
- },
- {
- .procname = "di_count",
- .data = &decnet_di_count,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_state_count,
- .extra2 = &max_state_count
- },
- {
- .procname = "dr_count",
- .data = &decnet_dr_count,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_state_count,
- .extra2 = &max_state_count
- },
- {
- .procname = "dst_gc_interval",
- .data = &decnet_dst_gc_interval,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_decnet_dst_gc_interval,
- .extra2 = &max_decnet_dst_gc_interval
- },
- {
- .procname = "no_fc_max_cwnd",
- .data = &decnet_no_fc_max_cwnd,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_decnet_no_fc_max_cwnd,
- .extra2 = &max_decnet_no_fc_max_cwnd
- },
- {
- .procname = "decnet_mem",
- .data = &sysctl_decnet_mem,
- .maxlen = sizeof(sysctl_decnet_mem),
- .mode = 0644,
- .proc_handler = proc_doulongvec_minmax
- },
- {
- .procname = "decnet_rmem",
- .data = &sysctl_decnet_rmem,
- .maxlen = sizeof(sysctl_decnet_rmem),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "decnet_wmem",
- .data = &sysctl_decnet_wmem,
- .maxlen = sizeof(sysctl_decnet_wmem),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "debug",
- .data = &decnet_debug_level,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- { }
-};
-
-void dn_register_sysctl(void)
-{
- dn_table_header = register_net_sysctl(&init_net, "net/decnet", dn_table);
-}
-
-void dn_unregister_sysctl(void)
-{
- unregister_net_sysctl_table(dn_table_header);
-}
-
-#else /* CONFIG_SYSCTL */
-void dn_unregister_sysctl(void)
-{
-}
-void dn_register_sysctl(void)
-{
-}
-
-#endif
if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_ipv6) <= hooknum))
return NULL;
return net->nf.hooks_ipv6 + hooknum;
-#if IS_ENABLED(CONFIG_DECNET)
- case NFPROTO_DECNET:
- if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_decnet) <= hooknum))
- return NULL;
- return net->nf.hooks_decnet + hooknum;
-#endif
default:
WARN_ON_ONCE(1);
return NULL;
#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
__netfilter_net_init(net->nf.hooks_bridge, ARRAY_SIZE(net->nf.hooks_bridge));
#endif
-#if IS_ENABLED(CONFIG_DECNET)
- __netfilter_net_init(net->nf.hooks_decnet, ARRAY_SIZE(net->nf.hooks_decnet));
-#endif
-
#ifdef CONFIG_PROC_FS
net->nf.proc_netfilter = proc_net_mkdir(net, "netfilter",
net->proc_net);
hook_head = rcu_dereference(net->nf.hooks_bridge[hook]);
#endif
break;
-#if IS_ENABLED(CONFIG_DECNET)
- case NFPROTO_DECNET:
- if (hook >= ARRAY_SIZE(net->nf.hooks_decnet))
- return ERR_PTR(-EINVAL);
- hook_head = rcu_dereference(net->nf.hooks_decnet[hook]);
- break;
-#endif
#if defined(CONFIG_NETFILTER_INGRESS) || defined(CONFIG_NETFILTER_EGRESS)
case NFPROTO_NETDEV:
if (hook >= NF_NETDEV_NUMHOOKS)
projects / users / jedix / linux-maple.git / commitdiff