libnl  3.2.24-rc1
neightbl.c
1 /*
2  * lib/route/neightbl.c neighbour tables
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation version 2.1
7  * of the License.
8  *
9  * Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch>
10  */
11 
12 /**
13  * @ingroup rtnl
14  * @defgroup neightbl Neighbour Tables
15  * @brief
16  * @{
17  */
18 
19 #include <netlink-private/netlink.h>
20 #include <netlink/netlink.h>
21 #include <netlink/utils.h>
22 #include <netlink/route/rtnl.h>
23 #include <netlink/route/neightbl.h>
24 #include <netlink/route/link.h>
25 
26 /** @cond SKIP */
27 #define NEIGHTBL_ATTR_FAMILY 0x001
28 #define NEIGHTBL_ATTR_STATS 0x002
29 #define NEIGHTBL_ATTR_NAME 0x004
30 #define NEIGHTBL_ATTR_THRESH1 0x008
31 #define NEIGHTBL_ATTR_THRESH2 0x010
32 #define NEIGHTBL_ATTR_THRESH3 0x020
33 #define NEIGHTBL_ATTR_CONFIG 0x040
34 #define NEIGHTBL_ATTR_PARMS 0x080
35 #define NEIGHTBL_ATTR_GC_INTERVAL 0x100
36 
37 #define NEIGHTBLPARM_ATTR_IFINDEX 0x0001
38 #define NEIGHTBLPARM_ATTR_REFCNT 0x0002
39 #define NEIGHTBLPARM_ATTR_QUEUE_LEN 0x0004
40 #define NEIGHTBLPARM_ATTR_APP_PROBES 0x0008
41 #define NEIGHTBLPARM_ATTR_UCAST_PROBES 0x0010
42 #define NEIGHTBLPARM_ATTR_MCAST_PROBES 0x0020
43 #define NEIGHTBLPARM_ATTR_PROXY_QLEN 0x0040
44 #define NEIGHTBLPARM_ATTR_REACHABLE_TIME 0x0080
45 #define NEIGHTBLPARM_ATTR_BASE_REACHABLE_TIME 0x0100
46 #define NEIGHTBLPARM_ATTR_RETRANS_TIME 0x0200
47 #define NEIGHTBLPARM_ATTR_GC_STALETIME 0x0400
48 #define NEIGHTBLPARM_ATTR_DELAY_PROBE_TIME 0x0800
49 #define NEIGHTBLPARM_ATTR_ANYCAST_DELAY 0x1000
50 #define NEIGHTBLPARM_ATTR_PROXY_DELAY 0x2000
51 #define NEIGHTBLPARM_ATTR_LOCKTIME 0x4000
52 
53 static struct nl_cache_ops rtnl_neightbl_ops;
54 static struct nl_object_ops neightbl_obj_ops;
55 /** @endcond */
56 
57 static int neightbl_compare(struct nl_object *_a, struct nl_object *_b,
58  uint32_t attrs, int flags)
59 {
60  struct rtnl_neightbl *a = (struct rtnl_neightbl *) _a;
61  struct rtnl_neightbl *b = (struct rtnl_neightbl *) _b;
62  int diff = 0;
63 
64 #define NT_DIFF(ATTR, EXPR) ATTR_DIFF(attrs, NEIGHTBL_ATTR_##ATTR, a, b, EXPR)
65 
66  diff |= NT_DIFF(FAMILY, a->nt_family != b->nt_family);
67  diff |= NT_DIFF(NAME, strcmp(a->nt_name, b->nt_name));
68  diff |= NT_DIFF(THRESH1, a->nt_gc_thresh1 != b->nt_gc_thresh1);
69  diff |= NT_DIFF(THRESH2, a->nt_gc_thresh2 != b->nt_gc_thresh2);
70  diff |= NT_DIFF(THRESH3, a->nt_gc_thresh3 != b->nt_gc_thresh3);
71  diff |= NT_DIFF(GC_INTERVAL, a->nt_gc_interval != b->nt_gc_interval);
72 
73 #undef NT_DIFF
74 
75  if (!(a->ce_mask & NEIGHTBL_ATTR_PARMS) &&
76  !(b->ce_mask & NEIGHTBL_ATTR_PARMS))
77  return diff;
78 
79  /* XXX: FIXME: Compare parameter table */
80 
81 
82 #if 0
83 #define REQ(F) (fp->ntp_mask & NEIGHTBLPARM_ATTR_##F)
84 #define AVAIL(F) (op->ntp_mask & NEIGHTBLPARM_ATTR_##F)
85 #define _C(F, N) (REQ(F) && (!AVAIL(F) || (op->N != fp->N)))
86  if (_C(IFINDEX, ntp_ifindex) ||
87  _C(QUEUE_LEN, ntp_queue_len) ||
88  _C(APP_PROBES, ntp_app_probes) ||
89  _C(UCAST_PROBES, ntp_ucast_probes) ||
90  _C(MCAST_PROBES, ntp_mcast_probes) ||
91  _C(PROXY_QLEN, ntp_proxy_qlen) ||
92  _C(LOCKTIME, ntp_locktime) ||
93  _C(RETRANS_TIME, ntp_retrans_time) ||
94  _C(BASE_REACHABLE_TIME, ntp_base_reachable_time) ||
95  _C(GC_STALETIME, ntp_gc_stale_time) ||
96  _C(DELAY_PROBE_TIME, ntp_probe_delay) ||
97  _C(ANYCAST_DELAY, ntp_anycast_delay) ||
98  _C(PROXY_DELAY, ntp_proxy_delay))
99  return 0;
100 #undef REQ
101 #undef AVAIL
102 #undef _C
103 #endif
104 
105  return diff;
106 }
107 
108 
109 static struct nla_policy neightbl_policy[NDTA_MAX+1] = {
110  [NDTA_NAME] = { .type = NLA_STRING,
111  .maxlen = NTBLNAMSIZ },
112  [NDTA_THRESH1] = { .type = NLA_U32 },
113  [NDTA_THRESH2] = { .type = NLA_U32 },
114  [NDTA_THRESH3] = { .type = NLA_U32 },
115  [NDTA_GC_INTERVAL] = { .type = NLA_U32 },
116  [NDTA_CONFIG] = { .minlen = sizeof(struct ndt_config) },
117  [NDTA_STATS] = { .minlen = sizeof(struct ndt_stats) },
118  [NDTA_PARMS] = { .type = NLA_NESTED },
119 };
120 
121 static int neightbl_msg_parser(struct nl_cache_ops *ops,
122  struct sockaddr_nl *who, struct nlmsghdr *n,
123  struct nl_parser_param *pp)
124 {
125  struct rtnl_neightbl *ntbl;
126  struct nlattr *tb[NDTA_MAX + 1];
127  struct rtgenmsg *rtmsg;
128  int err;
129 
130  ntbl = rtnl_neightbl_alloc();
131  if (!ntbl) {
132  err = -NLE_NOMEM;
133  goto errout;
134  }
135 
136  ntbl->ce_msgtype = n->nlmsg_type;
137  rtmsg = nlmsg_data(n);
138 
139  err = nlmsg_parse(n, sizeof(*rtmsg), tb, NDTA_MAX, neightbl_policy);
140  if (err < 0)
141  goto errout;
142 
143  ntbl->nt_family = rtmsg->rtgen_family;
144 
145  if (tb[NDTA_NAME] == NULL) {
146  err = -NLE_MISSING_ATTR;
147  goto errout;
148  }
149 
150  nla_strlcpy(ntbl->nt_name, tb[NDTA_NAME], NTBLNAMSIZ);
151  ntbl->ce_mask |= NEIGHTBL_ATTR_NAME;
152 
153  if (tb[NDTA_THRESH1]) {
154  ntbl->nt_gc_thresh1 = nla_get_u32(tb[NDTA_THRESH1]);
155  ntbl->ce_mask |= NEIGHTBL_ATTR_THRESH1;
156  }
157 
158  if (tb[NDTA_THRESH2]) {
159  ntbl->nt_gc_thresh2 = nla_get_u32(tb[NDTA_THRESH2]);
160  ntbl->ce_mask |= NEIGHTBL_ATTR_THRESH2;
161  }
162 
163  if (tb[NDTA_THRESH3]) {
164  ntbl->nt_gc_thresh3 = nla_get_u32(tb[NDTA_THRESH3]);
165  ntbl->ce_mask |= NEIGHTBL_ATTR_THRESH3;
166  }
167 
168  if (tb[NDTA_GC_INTERVAL]) {
169  ntbl->nt_gc_interval = nla_get_u32(tb[NDTA_GC_INTERVAL]);
170  ntbl->ce_mask |= NEIGHTBL_ATTR_GC_INTERVAL;
171  }
172 
173  if (tb[NDTA_CONFIG]) {
174  nla_memcpy(&ntbl->nt_config, tb[NDTA_CONFIG],
175  sizeof(ntbl->nt_config));
176  ntbl->ce_mask |= NEIGHTBL_ATTR_CONFIG;
177  }
178 
179  if (tb[NDTA_STATS]) {
180  nla_memcpy(&ntbl->nt_stats, tb[NDTA_STATS],
181  sizeof(ntbl->nt_stats));
182  ntbl->ce_mask |= NEIGHTBL_ATTR_STATS;
183  }
184 
185  if (tb[NDTA_PARMS]) {
186  struct nlattr *tbp[NDTPA_MAX + 1];
187  struct rtnl_neightbl_parms *p = &ntbl->nt_parms;
188 
189  err = nla_parse_nested(tbp, NDTPA_MAX, tb[NDTA_PARMS], NULL);
190  if (err < 0)
191  goto errout;
192 
193 #define COPY_ENTRY(name, var) \
194  if (tbp[NDTPA_ ##name]) { \
195  p->ntp_ ##var = nla_get_u32(tbp[NDTPA_ ##name]); \
196  p->ntp_mask |= NEIGHTBLPARM_ATTR_ ##name; \
197  }
198 
199  COPY_ENTRY(IFINDEX, ifindex);
200  COPY_ENTRY(REFCNT, refcnt);
201  COPY_ENTRY(QUEUE_LEN, queue_len);
202  COPY_ENTRY(APP_PROBES, app_probes);
203  COPY_ENTRY(UCAST_PROBES, ucast_probes);
204  COPY_ENTRY(MCAST_PROBES, mcast_probes);
205  COPY_ENTRY(PROXY_QLEN, proxy_qlen);
206  COPY_ENTRY(PROXY_DELAY, proxy_delay);
207  COPY_ENTRY(ANYCAST_DELAY, anycast_delay);
208  COPY_ENTRY(LOCKTIME, locktime);
209  COPY_ENTRY(REACHABLE_TIME, reachable_time);
210  COPY_ENTRY(BASE_REACHABLE_TIME, base_reachable_time);
211  COPY_ENTRY(RETRANS_TIME, retrans_time);
212  COPY_ENTRY(GC_STALETIME, gc_stale_time);
213  COPY_ENTRY(DELAY_PROBE_TIME, probe_delay);
214 #undef COPY_ENTRY
215 
216  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
217  }
218 
219  err = pp->pp_cb((struct nl_object *) ntbl, pp);
220 errout:
221  rtnl_neightbl_put(ntbl);
222  return err;
223 }
224 
225 static int neightbl_request_update(struct nl_cache *c, struct nl_sock *h)
226 {
227  return nl_rtgen_request(h, RTM_GETNEIGHTBL, AF_UNSPEC, NLM_F_DUMP);
228 }
229 
230 
231 static void neightbl_dump_line(struct nl_object *arg, struct nl_dump_params *p)
232 {
233  struct rtnl_neightbl *ntbl = (struct rtnl_neightbl *) arg;
234 
235  nl_dump_line(p, "%s", ntbl->nt_name);
236 
237  if (ntbl->nt_parms.ntp_mask & NEIGHTBLPARM_ATTR_IFINDEX) {
238  struct nl_cache *link_cache;
239 
240  link_cache = nl_cache_mngt_require_safe("route/link");
241 
242  if (link_cache) {
243  char buf[32];
244  nl_dump(p, "<%s> ",
245  rtnl_link_i2name(link_cache,
246  ntbl->nt_parms.ntp_ifindex,
247  buf, sizeof(buf)));
248  nl_cache_put(link_cache);
249  } else
250  nl_dump(p, "<%u> ", ntbl->nt_parms.ntp_ifindex);
251  } else
252  nl_dump(p, " ");
253 
254  if (ntbl->ce_mask & NEIGHTBL_ATTR_CONFIG)
255  nl_dump(p, "entries %u ", ntbl->nt_config.ndtc_entries);
256 
257  if (ntbl->ce_mask & NEIGHTBL_ATTR_PARMS) {
258  char rt[32], rt2[32];
259  struct rtnl_neightbl_parms *pa = &ntbl->nt_parms;
260 
261  nl_dump(p, "reachable-time %s retransmit-time %s",
262  nl_msec2str(pa->ntp_reachable_time, rt, sizeof(rt)),
263  nl_msec2str(pa->ntp_retrans_time, rt2, sizeof(rt2)));
264  }
265 
266  nl_dump(p, "\n");
267 }
268 
269 static void neightbl_dump_details(struct nl_object *arg, struct nl_dump_params *p)
270 {
271  char x[32], y[32], z[32];
272  struct rtnl_neightbl *ntbl = (struct rtnl_neightbl *) arg;
273 
274  neightbl_dump_line(arg, p);
275 
276  if (ntbl->ce_mask & NEIGHTBL_ATTR_CONFIG) {
277  nl_dump_line(p, " key-len %u entry-size %u last-flush %s\n",
278  ntbl->nt_config.ndtc_key_len,
279  ntbl->nt_config.ndtc_entry_size,
280  nl_msec2str(ntbl->nt_config.ndtc_last_flush,
281  x, sizeof(x)));
282 
283  nl_dump_line(p, " gc threshold %u/%u/%u interval %s " \
284  "chain-position %u\n",
285  ntbl->nt_gc_thresh1, ntbl->nt_gc_thresh2,
286  ntbl->nt_gc_thresh3,
287  nl_msec2str(ntbl->nt_gc_interval, x, sizeof(x)),
288  ntbl->nt_config.ndtc_hash_chain_gc);
289 
290  nl_dump_line(p, " hash-rand 0x%08X/0x%08X last-rand %s\n",
291  ntbl->nt_config.ndtc_hash_rnd,
292  ntbl->nt_config.ndtc_hash_mask,
293  nl_msec2str(ntbl->nt_config.ndtc_last_rand,
294  x, sizeof(x)));
295  }
296 
297  if (ntbl->ce_mask & NEIGHTBL_ATTR_PARMS) {
298  struct rtnl_neightbl_parms *pa = &ntbl->nt_parms;
299 
300  nl_dump_line(p, " refcnt %u pending-queue-limit %u " \
301  "proxy-delayed-queue-limit %u\n",
302  pa->ntp_refcnt,
303  pa->ntp_queue_len,
304  pa->ntp_proxy_qlen);
305 
306  nl_dump_line(p, " num-userspace-probes %u num-unicast-probes " \
307  "%u num-multicast-probes %u\n",
308  pa->ntp_app_probes,
309  pa->ntp_ucast_probes,
310  pa->ntp_mcast_probes);
311 
312  nl_dump_line(p, " min-age %s base-reachable-time %s " \
313  "stale-check-interval %s\n",
314  nl_msec2str(pa->ntp_locktime, x, sizeof(x)),
315  nl_msec2str(pa->ntp_base_reachable_time,
316  y, sizeof(y)),
317  nl_msec2str(pa->ntp_gc_stale_time, z, sizeof(z)));
318 
319  nl_dump_line(p, " initial-probe-delay %s answer-delay %s " \
320  "proxy-answer-delay %s\n",
321  nl_msec2str(pa->ntp_probe_delay, x, sizeof(x)),
322  nl_msec2str(pa->ntp_anycast_delay, y, sizeof(y)),
323  nl_msec2str(pa->ntp_proxy_delay, z, sizeof(z)));
324  }
325 }
326 
327 static void neightbl_dump_stats(struct nl_object *arg, struct nl_dump_params *p)
328 {
329  struct rtnl_neightbl *ntbl = (struct rtnl_neightbl *) arg;
330 
331  neightbl_dump_details(arg, p);
332 
333  if (!(ntbl->ce_mask & NEIGHTBL_ATTR_STATS))
334  return;
335 
336  nl_dump_line(p, " " \
337  " lookups %" PRIu64 \
338  " hits %" PRIu64 \
339  " failed %" PRIu64 \
340  " allocations %" PRIu64 \
341  " destroys %" PRIu64 \
342  "\n",
343  ntbl->nt_stats.ndts_lookups,
344  ntbl->nt_stats.ndts_hits,
345  ntbl->nt_stats.ndts_res_failed,
346  ntbl->nt_stats.ndts_allocs,
347  ntbl->nt_stats.ndts_destroys);
348 
349  nl_dump_line(p, " " \
350  " hash-grows %" PRIu64 \
351  " forced-gc-runs %" PRIu64 \
352  " periodic-gc-runs %" PRIu64 \
353  "\n",
354  ntbl->nt_stats.ndts_hash_grows,
355  ntbl->nt_stats.ndts_forced_gc_runs,
356  ntbl->nt_stats.ndts_periodic_gc_runs);
357 
358  nl_dump_line(p, " " \
359  " rcv-unicast-probes %" PRIu64 \
360  " rcv-multicast-probes %" PRIu64 \
361  "\n",
362  ntbl->nt_stats.ndts_rcv_probes_ucast,
363  ntbl->nt_stats.ndts_rcv_probes_mcast);
364 }
365 
366 /**
367  * @name Allocation/Freeing
368  * @{
369  */
370 
371 struct rtnl_neightbl *rtnl_neightbl_alloc(void)
372 {
373  return (struct rtnl_neightbl *) nl_object_alloc(&neightbl_obj_ops);
374 }
375 
376 void rtnl_neightbl_put(struct rtnl_neightbl *neightbl)
377 {
378  nl_object_put((struct nl_object *) neightbl);
379 }
380 
381 /** @} */
382 
383 /**
384  * @name Neighbour Table Cache Management
385  * @{
386  */
387 
388 /**
389  * Build a neighbour table cache including all neighbour tables currently configured in the kernel.
390  * @arg sk Netlink socket.
391  * @arg result Pointer to store resulting cache.
392  *
393  * Allocates a new neighbour table cache, initializes it properly and
394  * updates it to include all neighbour tables currently configured in
395  * the kernel.
396  *
397  * @return 0 on success or a negative error code.
398  */
399 int rtnl_neightbl_alloc_cache(struct nl_sock *sk, struct nl_cache **result)
400 {
401  return nl_cache_alloc_and_fill(&rtnl_neightbl_ops, sk, result);
402 }
403 
404 /**
405  * Lookup neighbour table by name and optional interface index
406  * @arg cache neighbour table cache
407  * @arg name name of table
408  * @arg ifindex optional interface index
409  *
410  * Looks up the neighbour table matching the specified name and
411  * optionally the specified ifindex to retrieve device specific
412  * parameter sets.
413  *
414  * @return ptr to neighbour table inside the cache or NULL if no
415  * match was found.
416  */
417 struct rtnl_neightbl *rtnl_neightbl_get(struct nl_cache *cache,
418  const char *name, int ifindex)
419 {
420  struct rtnl_neightbl *nt;
421 
422  if (cache->c_ops != &rtnl_neightbl_ops)
423  return NULL;
424 
425  nl_list_for_each_entry(nt, &cache->c_items, ce_list) {
426  if (!strcasecmp(nt->nt_name, name) &&
427  ((!ifindex && !nt->nt_parms.ntp_ifindex) ||
428  (ifindex && ifindex == nt->nt_parms.ntp_ifindex))) {
429  nl_object_get((struct nl_object *) nt);
430  return nt;
431  }
432  }
433 
434  return NULL;
435 }
436 
437 /** @} */
438 
439 /**
440  * @name Neighbour Table Modifications
441  * @{
442  */
443 
444 /**
445  * Builds a netlink change request message to change neighbour table attributes
446  * @arg old neighbour table to change
447  * @arg tmpl template with requested changes
448  * @arg result Pointer to store resulting message.
449  *
450  * Builds a new netlink message requesting a change of neighbour table
451  * attributes. The netlink message header isn't fully equipped with all
452  * relevant fields and must be sent out via nl_send_auto_complete() or
453  * supplemented as needed.
454  * \a old must point to a neighbour table currently configured in the
455  * kernel and \a tmpl must contain the attributes to be changed set via
456  * \c rtnl_neightbl_set_* functions.
457  *
458  * @return 0 on success or a negative error code.
459  */
460 int rtnl_neightbl_build_change_request(struct rtnl_neightbl *old,
461  struct rtnl_neightbl *tmpl,
462  struct nl_msg **result)
463 {
464  struct nl_msg *m, *parms = NULL;
465  struct ndtmsg ndt = {
466  .ndtm_family = old->nt_family,
467  };
468 
469  m = nlmsg_alloc_simple(RTM_SETNEIGHTBL, 0);
470  if (!m)
471  return -NLE_NOMEM;
472 
473  if (nlmsg_append(m, &ndt, sizeof(ndt), NLMSG_ALIGNTO) < 0)
474  goto nla_put_failure;
475 
476  NLA_PUT_STRING(m, NDTA_NAME, old->nt_name);
477 
478  if (tmpl->ce_mask & NEIGHTBL_ATTR_THRESH1)
479  NLA_PUT_U32(m, NDTA_THRESH1, tmpl->nt_gc_thresh1);
480 
481  if (tmpl->ce_mask & NEIGHTBL_ATTR_THRESH2)
482  NLA_PUT_U32(m, NDTA_THRESH2, tmpl->nt_gc_thresh2);
483 
484  if (tmpl->ce_mask & NEIGHTBL_ATTR_THRESH2)
485  NLA_PUT_U32(m, NDTA_THRESH2, tmpl->nt_gc_thresh2);
486 
487  if (tmpl->ce_mask & NEIGHTBL_ATTR_GC_INTERVAL)
488  NLA_PUT_U64(m, NDTA_GC_INTERVAL,
489  tmpl->nt_gc_interval);
490 
491  if (tmpl->ce_mask & NEIGHTBL_ATTR_PARMS) {
492  struct rtnl_neightbl_parms *p = &tmpl->nt_parms;
493 
494  parms = nlmsg_alloc();
495  if (!parms)
496  goto nla_put_failure;
497 
498  if (old->nt_parms.ntp_mask & NEIGHTBLPARM_ATTR_IFINDEX)
499  NLA_PUT_U32(parms, NDTPA_IFINDEX,
500  old->nt_parms.ntp_ifindex);
501 
502 
503  if (p->ntp_mask & NEIGHTBLPARM_ATTR_QUEUE_LEN)
504  NLA_PUT_U32(parms, NDTPA_QUEUE_LEN, p->ntp_queue_len);
505 
506  if (p->ntp_mask & NEIGHTBLPARM_ATTR_APP_PROBES)
507  NLA_PUT_U32(parms, NDTPA_APP_PROBES, p->ntp_app_probes);
508 
509  if (p->ntp_mask & NEIGHTBLPARM_ATTR_UCAST_PROBES)
510  NLA_PUT_U32(parms, NDTPA_UCAST_PROBES,
511  p->ntp_ucast_probes);
512 
513  if (p->ntp_mask & NEIGHTBLPARM_ATTR_MCAST_PROBES)
514  NLA_PUT_U32(parms, NDTPA_MCAST_PROBES,
515  p->ntp_mcast_probes);
516 
517  if (p->ntp_mask & NEIGHTBLPARM_ATTR_PROXY_QLEN)
518  NLA_PUT_U32(parms, NDTPA_PROXY_QLEN,
519  p->ntp_proxy_qlen);
520 
521  if (p->ntp_mask & NEIGHTBLPARM_ATTR_BASE_REACHABLE_TIME)
522  NLA_PUT_U64(parms, NDTPA_BASE_REACHABLE_TIME,
523  p->ntp_base_reachable_time);
524 
525  if (p->ntp_mask & NEIGHTBLPARM_ATTR_RETRANS_TIME)
526  NLA_PUT_U64(parms, NDTPA_RETRANS_TIME,
527  p->ntp_retrans_time);
528 
529  if (p->ntp_mask & NEIGHTBLPARM_ATTR_GC_STALETIME)
530  NLA_PUT_U64(parms, NDTPA_GC_STALETIME,
531  p->ntp_gc_stale_time);
532 
533  if (p->ntp_mask & NEIGHTBLPARM_ATTR_DELAY_PROBE_TIME)
534  NLA_PUT_U64(parms, NDTPA_DELAY_PROBE_TIME,
535  p->ntp_proxy_delay);
536 
537  if (p->ntp_mask & NEIGHTBLPARM_ATTR_ANYCAST_DELAY)
538  NLA_PUT_U64(parms, NDTPA_ANYCAST_DELAY,
539  p->ntp_anycast_delay);
540 
541  if (p->ntp_mask & NEIGHTBLPARM_ATTR_PROXY_DELAY)
542  NLA_PUT_U64(parms, NDTPA_PROXY_DELAY,
543  p->ntp_proxy_delay);
544 
545  if (p->ntp_mask & NEIGHTBLPARM_ATTR_LOCKTIME)
546  NLA_PUT_U64(parms, NDTPA_LOCKTIME, p->ntp_locktime);
547 
548  if (nla_put_nested(m, NDTA_PARMS, parms) < 0)
549  goto nla_put_failure;
550 
551  nlmsg_free(parms);
552  }
553 
554  *result = m;
555  return 0;
556 
557 nla_put_failure:
558  if (parms)
559  nlmsg_free(parms);
560  nlmsg_free(m);
561  return -NLE_MSGSIZE;
562 }
563 
564 /**
565  * Change neighbour table attributes
566  * @arg sk Netlink socket.
567  * @arg old neighbour table to be changed
568  * @arg tmpl template with requested changes
569  *
570  * Builds a new netlink message by calling
571  * rtnl_neightbl_build_change_request(), sends the request to the
572  * kernel and waits for the next ACK to be received, i.e. blocks
573  * until the request has been processed.
574  *
575  * @return 0 on success or a negative error code
576  */
577 int rtnl_neightbl_change(struct nl_sock *sk, struct rtnl_neightbl *old,
578  struct rtnl_neightbl *tmpl)
579 {
580  struct nl_msg *msg;
581  int err;
582 
583  if ((err = rtnl_neightbl_build_change_request(old, tmpl, &msg)) < 0)
584  return err;
585 
586  err = nl_send_auto_complete(sk, msg);
587  nlmsg_free(msg);
588  if (err < 0)
589  return err;
590 
591  return wait_for_ack(sk);
592 }
593 
594 /** @} */
595 
596 /**
597  * @name Attribute Modification
598  * @{
599  */
600 
601 void rtnl_neightbl_set_family(struct rtnl_neightbl *ntbl, int family)
602 {
603  ntbl->nt_family = family;
604  ntbl->ce_mask |= NEIGHTBL_ATTR_FAMILY;
605 }
606 
607 void rtnl_neightbl_set_gc_interval(struct rtnl_neightbl *ntbl, uint64_t ms)
608 {
609  ntbl->nt_gc_interval = ms;
610  ntbl->ce_mask |= NEIGHTBL_ATTR_GC_INTERVAL;
611 }
612 
613 void rtnl_neightbl_set_gc_tresh1(struct rtnl_neightbl *ntbl, int thresh)
614 {
615  ntbl->nt_gc_thresh1 = thresh;
616  ntbl->ce_mask |= NEIGHTBL_ATTR_THRESH1;
617 }
618 
619 void rtnl_neightbl_set_gc_tresh2(struct rtnl_neightbl *ntbl, int thresh)
620 {
621  ntbl->nt_gc_thresh2 = thresh;
622  ntbl->ce_mask |= NEIGHTBL_ATTR_THRESH2;
623 }
624 
625 void rtnl_neightbl_set_gc_tresh3(struct rtnl_neightbl *ntbl, int thresh)
626 {
627  ntbl->nt_gc_thresh3 = thresh;
628  ntbl->ce_mask |= NEIGHTBL_ATTR_THRESH3;
629 }
630 
631 void rtnl_neightbl_set_name(struct rtnl_neightbl *ntbl, const char *name)
632 {
633  strncpy(ntbl->nt_name, name, sizeof(ntbl->nt_name) - 1);
634  ntbl->ce_mask |= NEIGHTBL_ATTR_NAME;
635 }
636 
637 void rtnl_neightbl_set_dev(struct rtnl_neightbl *ntbl, int ifindex)
638 {
639  ntbl->nt_parms.ntp_ifindex = ifindex;
640  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_IFINDEX;
641  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
642 }
643 
644 /**
645  * Set the queue length for pending requests of a neighbour table to the specified value
646  * @arg ntbl neighbour table to change
647  * @arg len new queue len
648  */
649 void rtnl_neightbl_set_queue_len(struct rtnl_neightbl *ntbl, int len)
650 {
651  ntbl->nt_parms.ntp_queue_len = len;
652  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_QUEUE_LEN;
653  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
654 }
655 
656 /**
657  * Set the queue length for delay proxy arp requests of a neighbour table to the specified value
658  * @arg ntbl neighbour table to change
659  * @arg len new queue len
660  */
661 void rtnl_neightbl_set_proxy_queue_len(struct rtnl_neightbl *ntbl, int len)
662 {
663  ntbl->nt_parms.ntp_proxy_qlen = len;
664  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_PROXY_QLEN;
665  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
666 }
667 
668 /**
669  * Set the number of application probes of a neighbour table to the specified value
670  * @arg ntbl neighbour table to change
671  * @arg probes new probes value
672  */
673 void rtnl_neightbl_set_app_probes(struct rtnl_neightbl *ntbl, int probes)
674 {
675  ntbl->nt_parms.ntp_app_probes = probes;
676  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_APP_PROBES;
677  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
678 }
679 
680 /**
681  * Set the number of unicast probes of a neighbour table to the specified value
682  * @arg ntbl neighbour table to change
683  * @arg probes new probes value
684  */
685 void rtnl_neightbl_set_ucast_probes(struct rtnl_neightbl *ntbl, int probes)
686 {
687  ntbl->nt_parms.ntp_ucast_probes = probes;
688  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_UCAST_PROBES;
689  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
690 }
691 
692 /**
693  * Set the number of multicast probes of a neighbour table to the specified value
694  * @arg ntbl neighbour table to change
695  * @arg probes new probes value
696  */
697 void rtnl_neightbl_set_mcast_probes(struct rtnl_neightbl *ntbl, int probes)
698 {
699  ntbl->nt_parms.ntp_mcast_probes = probes;
700  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_MCAST_PROBES;
701  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
702 }
703 
704 /**
705  * Set the base reachable time of a neighbour table to the specified value
706  * @arg ntbl neighbour table to change
707  * @arg ms new base reachable time in milliseconds
708  */
709 void rtnl_neightbl_set_base_reachable_time(struct rtnl_neightbl *ntbl,
710  uint64_t ms)
711 {
712  ntbl->nt_parms.ntp_base_reachable_time = ms;
713  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_BASE_REACHABLE_TIME;
714  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
715 }
716 
717 /**
718  * Set the retransmit time of a neighbour table to the specified value
719  * @arg ntbl neighbour table to change
720  * @arg ms new retransmit time
721  */
722 void rtnl_neightbl_set_retrans_time(struct rtnl_neightbl *ntbl, uint64_t ms)
723 {
724  ntbl->nt_parms.ntp_retrans_time = ms;
725  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_RETRANS_TIME;
726  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
727 }
728 
729 /**
730  * Set the gc stale time of a neighbour table to the specified value
731  * @arg ntbl neighbour table to change
732  * @arg ms new gc stale time in milliseconds
733  */
734 void rtnl_neightbl_set_gc_stale_time(struct rtnl_neightbl *ntbl, uint64_t ms)
735 {
736  ntbl->nt_parms.ntp_gc_stale_time = ms;
737  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_GC_STALETIME;
738  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
739 }
740 
741 /**
742  * Set the first probe delay time of a neighbour table to the specified value
743  * @arg ntbl neighbour table to change
744  * @arg ms new first probe delay time in milliseconds
745  */
746 void rtnl_neightbl_set_delay_probe_time(struct rtnl_neightbl *ntbl, uint64_t ms)
747 {
748  ntbl->nt_parms.ntp_probe_delay = ms;
749  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_DELAY_PROBE_TIME;
750  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
751 }
752 
753 /**
754  * Set the anycast delay of a neighbour table to the specified value
755  * @arg ntbl neighbour table to change
756  * @arg ms new anycast delay in milliseconds
757  */
758 void rtnl_neightbl_set_anycast_delay(struct rtnl_neightbl *ntbl, uint64_t ms)
759 {
760  ntbl->nt_parms.ntp_anycast_delay = ms;
761  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_ANYCAST_DELAY;
762  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
763 }
764 
765 /**
766  * Set the proxy delay of a neighbour table to the specified value
767  * @arg ntbl neighbour table to change
768  * @arg ms new proxy delay in milliseconds
769  */
770 void rtnl_neightbl_set_proxy_delay(struct rtnl_neightbl *ntbl, uint64_t ms)
771 {
772  ntbl->nt_parms.ntp_proxy_delay = ms;
773  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_PROXY_DELAY;
774  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
775 }
776 
777 /**
778  * Set the locktime of a neighbour table to the specified value
779  * @arg ntbl neighbour table to change
780  * @arg ms new locktime in milliseconds
781  */
782 void rtnl_neightbl_set_locktime(struct rtnl_neightbl *ntbl, uint64_t ms)
783 {
784  ntbl->nt_parms.ntp_locktime = ms;
785  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_LOCKTIME;
786  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
787 }
788 
789 /** @} */
790 
791 static struct nl_object_ops neightbl_obj_ops = {
792  .oo_name = "route/neightbl",
793  .oo_size = sizeof(struct rtnl_neightbl),
794  .oo_dump = {
795  [NL_DUMP_LINE] = neightbl_dump_line,
796  [NL_DUMP_DETAILS] = neightbl_dump_details,
797  [NL_DUMP_STATS] = neightbl_dump_stats,
798  },
799  .oo_compare = neightbl_compare,
800 };
801 
802 static struct nl_cache_ops rtnl_neightbl_ops = {
803  .co_name = "route/neightbl",
804  .co_hdrsize = sizeof(struct rtgenmsg),
805  .co_msgtypes = {
806  { RTM_NEWNEIGHTBL, NL_ACT_NEW, "new" },
807  { RTM_SETNEIGHTBL, NL_ACT_SET, "set" },
808  { RTM_GETNEIGHTBL, NL_ACT_GET, "get" },
809  END_OF_MSGTYPES_LIST,
810  },
811  .co_protocol = NETLINK_ROUTE,
812  .co_request_update = neightbl_request_update,
813  .co_msg_parser = neightbl_msg_parser,
814  .co_obj_ops = &neightbl_obj_ops,
815 };
816 
817 static void __init neightbl_init(void)
818 {
819  nl_cache_mngt_register(&rtnl_neightbl_ops);
820 }
821 
822 static void __exit neightbl_exit(void)
823 {
824  nl_cache_mngt_unregister(&rtnl_neightbl_ops);
825 }
826 
827 /** @} */