Add missing ppp.h

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

diff --git a/ppp.h b/ppp.h
new file mode 100644 (file)
index 0000000..354c449
--- /dev/null
+++ b/ppp.h
@@ -0,0 +1,106 @@
+/*
+ * OpenConnect (SSL + DTLS) VPN client
+ *
+ * Copyright © 2020 David Woodhouse, Daniel Lenski
+ *
+ * Authors: David Woodhouse <dwmw2@infradead.org>, Daniel Lenski <dlenski@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * version 2.1, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ */
+
+#ifndef __OPENCONNECT_PPP_H__
+#define __OPENCONNECT_PPP_H__
+
+#include <config.h>
+
+#include "openconnect-internal.h"
+
+#define PPP_LCP                0xc021
+#define PPP_IPCP       0x8021
+#define PPP_IP6CP      0x8057
+#define PPP_IP         0x21
+#define PPP_IP6                0x57
+
+#define CONFREQ 1
+#define CONFACK 2
+#define CONFNAK 3
+#define CONFREJ 4
+#define TERMREQ 5
+#define TERMACK 6
+#define CODEREJ 7
+#define PROTREJ 8
+#define ECHOREQ 9
+#define ECHOREP 10
+#define DISCREQ 11
+
+#define PPPINITFCS16    0xffff  /* Initial FCS value */
+#define PPPGOODFCS16    0xf0b8  /* Good final FCS value */
+
+/* When sending LCP, always escape characters < 0x20 */
+#define ASYNCMAP_LCP 0xffffffffUL
+
+/* Our own flag values, not wire protocol */
+#define ACCOMP 1
+#define PFCOMP 2
+#define VJCOMP 4
+
+#define PPPS_DEAD              0
+#define PPPS_ESTABLISH         1
+#define PPPS_OPENED            2
+#define PPPS_AUTHENTICATE      3
+#define PPPS_NETWORK           4
+#define PPPS_TERMINATE         5
+
+#define NCP_CONF_REQ_RECEIVED  1
+#define NCP_CONF_REQ_SENT      2
+#define NCP_CONF_ACK_RECEIVED  4
+#define NCP_CONF_ACK_SENT      8
+#define NCP_TERM_REQ_SENT      16
+#define NCP_TERM_REQ_RECEIVED  32
+#define NCP_TERM_ACK_SENT      16
+#define NCP_TERM_ACK_RECEIVED  32
+
+struct oc_ncp {
+       int state;
+       int id;
+       time_t last_req;
+};
+
+struct oc_ppp {
+       /* We need to know these before we start */
+       int encap;
+       int encap_len;
+       int hdlc;
+       int want_ipv4;
+       int want_ipv6;
+
+       int ppp_state;
+       struct oc_ncp lcp;
+       struct oc_ncp ipcp;
+       struct oc_ncp ip6cp;
+
+       /* Outgoing options */
+       uint32_t out_asyncmap;
+       int out_lcp_opts;
+       int32_t out_lcp_magic; /* stored in on-the-wire order */
+       struct in_addr out_peer_addr;
+       uint64_t out_ipv6_int_ident;
+       uint8_t util_id;
+
+       /* Incoming options */
+       int exp_ppp_hdr_size;
+       uint32_t in_asyncmap;
+       int in_lcp_opts;
+       int32_t in_lcp_magic; /* stored in on-the-wire order */
+       struct in_addr in_peer_addr;
+       uint64_t in_ipv6_int_ident;
+};
+
+#endif /* __OPENCONNECT_PPP_H__ */