libnl  1.1.4
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) 2003-2006 Thomas Graf <tgraf@suug.ch>
10  */
11 
12 /**
13  * @ingroup rtnl
14  * @defgroup neightbl Neighbour Tables
15  * @brief
16  * @{
17  */
18 
19 #include <netlink-local.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 = nl_errno(ENOMEM);
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 = nl_error(EINVAL, "NDTA_NAME is missing");
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  if (err < 0)
221  goto errout;
222 
223  err = P_ACCEPT;
224 errout:
225  rtnl_neightbl_put(ntbl);
226  return err;
227 }
228 
229 static int neightbl_request_update(struct nl_cache *c, struct nl_handle *h)
230 {
231  return nl_rtgen_request(h, RTM_GETNEIGHTBL, AF_UNSPEC, NLM_F_DUMP);
232 }
233 
234 
235 static int neightbl_dump_brief(struct nl_object *arg, struct nl_dump_params *p)
236 {
237  int line = 1;
238  struct rtnl_neightbl *ntbl = (struct rtnl_neightbl *) arg;
239 
240  dp_dump(p, "%s", ntbl->nt_name);
241 
242  if (ntbl->nt_parms.ntp_mask & NEIGHTBLPARM_ATTR_IFINDEX) {
243  struct nl_cache *link_cache;
244 
245  link_cache = nl_cache_mngt_require("route/link");
246 
247  if (link_cache) {
248  char buf[32];
249  dp_dump(p, "<%s> ",
250  rtnl_link_i2name(link_cache,
251  ntbl->nt_parms.ntp_ifindex,
252  buf, sizeof(buf)));
253  } else
254  dp_dump(p, "<%u> ", ntbl->nt_parms.ntp_ifindex);
255  } else
256  dp_dump(p, " ");
257 
258  if (ntbl->ce_mask & NEIGHTBL_ATTR_CONFIG)
259  dp_dump(p, "entries %u ", ntbl->nt_config.ndtc_entries);
260 
261  if (ntbl->ce_mask & NEIGHTBL_ATTR_PARMS) {
262  char rt[32], rt2[32];
263  struct rtnl_neightbl_parms *pa = &ntbl->nt_parms;
264 
265  dp_dump(p, "reachable-time %s retransmit-time %s",
266  nl_msec2str(pa->ntp_reachable_time, rt, sizeof(rt)),
267  nl_msec2str(pa->ntp_retrans_time, rt2, sizeof(rt2)));
268  }
269 
270  dp_dump(p, "\n");
271 
272  return line;
273 }
274 
275 static int neightbl_dump_full(struct nl_object *arg, struct nl_dump_params *p)
276 {
277  char x[32], y[32], z[32];
278  struct rtnl_neightbl *ntbl = (struct rtnl_neightbl *) arg;
279 
280  int line = neightbl_dump_brief(arg, p);
281 
282  if (ntbl->ce_mask & NEIGHTBL_ATTR_CONFIG) {
283  dp_new_line(p, line++);
284  dp_dump(p, " key-len %u entry-size %u last-flush %s\n",
285  ntbl->nt_config.ndtc_key_len,
286  ntbl->nt_config.ndtc_entry_size,
287  nl_msec2str(ntbl->nt_config.ndtc_last_flush,
288  x, sizeof(x)));
289 
290  dp_new_line(p, line++);
291  dp_dump(p, " gc threshold %u/%u/%u interval %s " \
292  "chain-position %u\n",
293  ntbl->nt_gc_thresh1, ntbl->nt_gc_thresh2,
294  ntbl->nt_gc_thresh3,
295  nl_msec2str(ntbl->nt_gc_interval, x, sizeof(x)),
296  ntbl->nt_config.ndtc_hash_chain_gc);
297 
298  dp_new_line(p, line++);
299  dp_dump(p, " hash-rand 0x%08X/0x%08X last-rand %s\n",
300  ntbl->nt_config.ndtc_hash_rnd,
301  ntbl->nt_config.ndtc_hash_mask,
302  nl_msec2str(ntbl->nt_config.ndtc_last_rand,
303  x, sizeof(x)));
304  }
305 
306  if (ntbl->ce_mask & NEIGHTBL_ATTR_PARMS) {
307  struct rtnl_neightbl_parms *pa = &ntbl->nt_parms;
308 
309  dp_new_line(p, line++);
310  dp_dump(p, " refcnt %u pending-queue-limit %u " \
311  "proxy-delayed-queue-limit %u\n",
312  pa->ntp_refcnt,
313  pa->ntp_queue_len,
314  pa->ntp_proxy_qlen);
315 
316  dp_new_line(p, line++);
317  dp_dump(p, " num-userspace-probes %u num-unicast-probes " \
318  "%u num-multicast-probes %u\n",
319  pa->ntp_app_probes,
320  pa->ntp_ucast_probes,
321  pa->ntp_mcast_probes);
322 
323  dp_new_line(p, line++);
324  dp_dump(p, " min-age %s base-reachable-time %s " \
325  "stale-check-interval %s\n",
326  nl_msec2str(pa->ntp_locktime, x, sizeof(x)),
327  nl_msec2str(pa->ntp_base_reachable_time,
328  y, sizeof(y)),
329  nl_msec2str(pa->ntp_gc_stale_time, z, sizeof(z)));
330 
331  dp_new_line(p, line++);
332  dp_dump(p, " initial-probe-delay %s answer-delay %s " \
333  "proxy-answer-delay %s\n",
334  nl_msec2str(pa->ntp_probe_delay, x, sizeof(x)),
335  nl_msec2str(pa->ntp_anycast_delay, y, sizeof(y)),
336  nl_msec2str(pa->ntp_proxy_delay, z, sizeof(z)));
337  }
338 
339  return line;
340 }
341 
342 static int neightbl_dump_stats(struct nl_object *arg, struct nl_dump_params *p)
343 {
344  struct rtnl_neightbl *ntbl = (struct rtnl_neightbl *) arg;
345  int line = neightbl_dump_full(arg, p);
346 
347  if (!(ntbl->ce_mask & NEIGHTBL_ATTR_STATS))
348  return line;
349 
350  dp_new_line(p, line++);
351  dp_dump(p, " lookups %lld hits %lld failed %lld " \
352  "allocations %lld destroys %lld\n",
353  ntbl->nt_stats.ndts_lookups,
354  ntbl->nt_stats.ndts_hits,
355  ntbl->nt_stats.ndts_res_failed,
356  ntbl->nt_stats.ndts_allocs,
357  ntbl->nt_stats.ndts_destroys);
358 
359  dp_new_line(p, line++);
360  dp_dump(p, " hash-grows %lld forced-gc-runs %lld " \
361  "periodic-gc-runs %lld\n",
362  ntbl->nt_stats.ndts_hash_grows,
363  ntbl->nt_stats.ndts_forced_gc_runs,
364  ntbl->nt_stats.ndts_periodic_gc_runs);
365 
366  dp_dump(p, " rcv-unicast-probes %lld rcv-multicast-probes %lld\n",
367  ntbl->nt_stats.ndts_rcv_probes_ucast,
368  ntbl->nt_stats.ndts_rcv_probes_mcast);
369 
370  return line;
371 }
372 
373 /**
374  * @name Allocation/Freeing
375  * @{
376  */
377 
378 struct rtnl_neightbl *rtnl_neightbl_alloc(void)
379 {
380  return (struct rtnl_neightbl *) nl_object_alloc(&neightbl_obj_ops);
381 }
382 
383 void rtnl_neightbl_put(struct rtnl_neightbl *neightbl)
384 {
385  nl_object_put((struct nl_object *) neightbl);
386 }
387 
388 /** @} */
389 
390 /**
391  * @name Neighbour Table Cache Management
392  * @{
393  */
394 
395 /**
396  * Build a neighbour table cache including all neighbour tables currently configured in the kernel.
397  * @arg handle netlink handle
398  *
399  * Allocates a new neighbour table cache, initializes it properly and
400  * updates it to include all neighbour tables currently configured in
401  * the kernel.
402  *
403  * @note The caller is responsible for destroying and freeing the
404  * cache after using it.
405  * @return The new cache or NULL if an error occured.
406  */
407 struct nl_cache * rtnl_neightbl_alloc_cache(struct nl_handle *handle)
408 {
409  struct nl_cache * cache;
410 
411  cache = nl_cache_alloc(&rtnl_neightbl_ops);
412  if (cache == NULL)
413  return NULL;
414 
415  if (handle && nl_cache_refill(handle, cache) < 0) {
416  nl_cache_free(cache);
417  return NULL;
418  }
419 
420  return cache;
421 }
422 
423 /**
424  * Lookup neighbour table by name and optional interface index
425  * @arg cache neighbour table cache
426  * @arg name name of table
427  * @arg ifindex optional interface index
428  *
429  * Looks up the neighbour table matching the specified name and
430  * optionally the specified ifindex to retrieve device specific
431  * parameter sets.
432  *
433  * @return ptr to neighbour table inside the cache or NULL if no
434  * match was found.
435  */
436 struct rtnl_neightbl *rtnl_neightbl_get(struct nl_cache *cache,
437  const char *name, int ifindex)
438 {
439  struct rtnl_neightbl *nt;
440 
441  if (cache->c_ops != &rtnl_neightbl_ops)
442  return NULL;
443 
444  nl_list_for_each_entry(nt, &cache->c_items, ce_list) {
445  if (!strcasecmp(nt->nt_name, name) &&
446  ((!ifindex && !nt->nt_parms.ntp_ifindex) ||
447  (ifindex && ifindex == nt->nt_parms.ntp_ifindex))) {
448  nl_object_get((struct nl_object *) nt);
449  return nt;
450  }
451  }
452 
453  return NULL;
454 }
455 
456 /** @} */
457 
458 /**
459  * @name Neighbour Table Modifications
460  * @{
461  */
462 
463 /**
464  * Builds a netlink change request message to change neighbour table attributes
465  * @arg old neighbour table to change
466  * @arg tmpl template with requested changes
467  *
468  * Builds a new netlink message requesting a change of neighbour table
469  * attributes. The netlink message header isn't fully equipped with all
470  * relevant fields and must be sent out via nl_send_auto_complete() or
471  * supplemented as needed.
472  * \a old must point to a neighbour table currently configured in the
473  * kernel and \a tmpl must contain the attributes to be changed set via
474  * \c rtnl_neightbl_set_* functions.
475  *
476  * @return New netlink message
477  */
478 struct nl_msg * rtnl_neightbl_build_change_request(struct rtnl_neightbl *old,
479  struct rtnl_neightbl *tmpl)
480 {
481  struct nl_msg *m;
482  struct ndtmsg ndt = {
483  .ndtm_family = old->nt_family,
484  };
485 
486  m = nlmsg_alloc_simple(RTM_SETNEIGHTBL, 0);
487  nlmsg_append(m, &ndt, sizeof(ndt), NLMSG_ALIGNTO);
488 
489  nla_put_string(m, NDTA_NAME, old->nt_name);
490 
491  if (tmpl->ce_mask & NEIGHTBL_ATTR_THRESH1)
492  nla_put_u32(m, NDTA_THRESH1, tmpl->nt_gc_thresh1);
493 
494  if (tmpl->ce_mask & NEIGHTBL_ATTR_THRESH2)
495  nla_put_u32(m, NDTA_THRESH2, tmpl->nt_gc_thresh2);
496 
497  if (tmpl->ce_mask & NEIGHTBL_ATTR_THRESH2)
498  nla_put_u32(m, NDTA_THRESH2, tmpl->nt_gc_thresh2);
499 
500  if (tmpl->ce_mask & NEIGHTBL_ATTR_GC_INTERVAL)
501  nla_put_u64(m, NDTA_GC_INTERVAL,
502  tmpl->nt_gc_interval);
503 
504  if (tmpl->ce_mask & NEIGHTBL_ATTR_PARMS) {
505  struct rtnl_neightbl_parms *p = &tmpl->nt_parms;
506  struct nl_msg *parms = nlmsg_alloc();
507 
508  if (old->nt_parms.ntp_mask & NEIGHTBLPARM_ATTR_IFINDEX)
509  nla_put_u32(parms, NDTPA_IFINDEX,
510  old->nt_parms.ntp_ifindex);
511 
512 
513  if (p->ntp_mask & NEIGHTBLPARM_ATTR_QUEUE_LEN)
514  nla_put_u32(parms, NDTPA_QUEUE_LEN, p->ntp_queue_len);
515 
516  if (p->ntp_mask & NEIGHTBLPARM_ATTR_APP_PROBES)
517  nla_put_u32(parms, NDTPA_APP_PROBES, p->ntp_app_probes);
518 
519  if (p->ntp_mask & NEIGHTBLPARM_ATTR_UCAST_PROBES)
520  nla_put_u32(parms, NDTPA_UCAST_PROBES,
521  p->ntp_ucast_probes);
522 
523  if (p->ntp_mask & NEIGHTBLPARM_ATTR_MCAST_PROBES)
524  nla_put_u32(parms, NDTPA_MCAST_PROBES,
525  p->ntp_mcast_probes);
526 
527  if (p->ntp_mask & NEIGHTBLPARM_ATTR_PROXY_QLEN)
528  nla_put_u32(parms, NDTPA_PROXY_QLEN,
529  p->ntp_proxy_qlen);
530 
531  if (p->ntp_mask & NEIGHTBLPARM_ATTR_BASE_REACHABLE_TIME)
532  nla_put_u64(parms, NDTPA_BASE_REACHABLE_TIME,
533  p->ntp_base_reachable_time);
534 
535  if (p->ntp_mask & NEIGHTBLPARM_ATTR_RETRANS_TIME)
536  nla_put_u64(parms, NDTPA_RETRANS_TIME,
537  p->ntp_retrans_time);
538 
539  if (p->ntp_mask & NEIGHTBLPARM_ATTR_GC_STALETIME)
540  nla_put_u64(parms, NDTPA_GC_STALETIME,
541  p->ntp_gc_stale_time);
542 
543  if (p->ntp_mask & NEIGHTBLPARM_ATTR_DELAY_PROBE_TIME)
544  nla_put_u64(parms, NDTPA_DELAY_PROBE_TIME,
545  p->ntp_proxy_delay);
546 
547  if (p->ntp_mask & NEIGHTBLPARM_ATTR_ANYCAST_DELAY)
548  nla_put_u64(parms, NDTPA_ANYCAST_DELAY,
549  p->ntp_anycast_delay);
550 
551  if (p->ntp_mask & NEIGHTBLPARM_ATTR_PROXY_DELAY)
552  nla_put_u64(parms, NDTPA_PROXY_DELAY,
553  p->ntp_proxy_delay);
554 
555  if (p->ntp_mask & NEIGHTBLPARM_ATTR_LOCKTIME)
556  nla_put_u64(parms, NDTPA_LOCKTIME, p->ntp_locktime);
557 
558  nla_put_nested(m, NDTA_PARMS, parms);
559  nlmsg_free(parms);
560  }
561 
562  return m;
563 }
564 
565 /**
566  * Change neighbour table attributes
567  * @arg handle netlink handle
568  * @arg old neighbour table to be changed
569  * @arg tmpl template with requested changes
570  *
571  * Builds a new netlink message by calling
572  * rtnl_neightbl_build_change_request(), sends the request to the
573  * kernel and waits for the next ACK to be received, i.e. blocks
574  * until the request has been processed.
575  *
576  * @return 0 on success or a negative error code
577  */
578 int rtnl_neightbl_change(struct nl_handle *handle, struct rtnl_neightbl *old,
579  struct rtnl_neightbl *tmpl)
580 {
581  int err;
582  struct nl_msg *msg;
583 
584  msg = rtnl_neightbl_build_change_request(old, tmpl);
585  err = nl_send_auto_complete(handle, msg);
586  nlmsg_free(msg);
587  if (err < 0)
588  return err;
589 
590  return nl_wait_for_ack(handle);
591 }
592 
593 /** @} */
594 
595 /**
596  * @name Attribute Modification
597  * @{
598  */
599 
600 void rtnl_neightbl_set_family(struct rtnl_neightbl *ntbl, int family)
601 {
602  ntbl->nt_family = family;
603  ntbl->ce_mask |= NEIGHTBL_ATTR_FAMILY;
604 }
605 
606 void rtnl_neightbl_set_gc_interval(struct rtnl_neightbl *ntbl, uint64_t ms)
607 {
608  ntbl->nt_gc_interval = ms;
609  ntbl->ce_mask |= NEIGHTBL_ATTR_GC_INTERVAL;
610 }
611 
612 void rtnl_neightbl_set_gc_tresh1(struct rtnl_neightbl *ntbl, int thresh)
613 {
614  ntbl->nt_gc_thresh1 = thresh;
615  ntbl->ce_mask |= NEIGHTBL_ATTR_THRESH1;
616 }
617 
618 void rtnl_neightbl_set_gc_tresh2(struct rtnl_neightbl *ntbl, int thresh)
619 {
620  ntbl->nt_gc_thresh2 = thresh;
621  ntbl->ce_mask |= NEIGHTBL_ATTR_THRESH2;
622 }
623 
624 void rtnl_neightbl_set_gc_tresh3(struct rtnl_neightbl *ntbl, int thresh)
625 {
626  ntbl->nt_gc_thresh3 = thresh;
627  ntbl->ce_mask |= NEIGHTBL_ATTR_THRESH3;
628 }
629 
630 void rtnl_neightbl_set_name(struct rtnl_neightbl *ntbl, const char *name)
631 {
632  strncpy(ntbl->nt_name, name, sizeof(ntbl->nt_name) - 1);
633  ntbl->ce_mask |= NEIGHTBL_ATTR_NAME;
634 }
635 
636 void rtnl_neightbl_set_dev(struct rtnl_neightbl *ntbl, int ifindex)
637 {
638  ntbl->nt_parms.ntp_ifindex = ifindex;
639  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_IFINDEX;
640  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
641 }
642 
643 /**
644  * Set the queue length for pending requests of a neighbour table to the specified value
645  * @arg ntbl neighbour table to change
646  * @arg len new queue len
647  */
648 void rtnl_neightbl_set_queue_len(struct rtnl_neightbl *ntbl, int len)
649 {
650  ntbl->nt_parms.ntp_queue_len = len;
651  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_QUEUE_LEN;
652  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
653 }
654 
655 /**
656  * Set the queue length for delay proxy arp requests of a neighbour table to the specified value
657  * @arg ntbl neighbour table to change
658  * @arg len new queue len
659  */
660 void rtnl_neightbl_set_proxy_queue_len(struct rtnl_neightbl *ntbl, int len)
661 {
662  ntbl->nt_parms.ntp_proxy_qlen = len;
663  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_PROXY_QLEN;
664  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
665 }
666 
667 /**
668  * Set the number of application probes of a neighbour table to the specified value
669  * @arg ntbl neighbour table to change
670  * @arg probes new probes value
671  */
672 void rtnl_neightbl_set_app_probes(struct rtnl_neightbl *ntbl, int probes)
673 {
674  ntbl->nt_parms.ntp_app_probes = probes;
675  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_APP_PROBES;
676  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
677 }
678 
679 /**
680  * Set the number of unicast probes of a neighbour table to the specified value
681  * @arg ntbl neighbour table to change
682  * @arg probes new probes value
683  */
684 void rtnl_neightbl_set_ucast_probes(struct rtnl_neightbl *ntbl, int probes)
685 {
686  ntbl->nt_parms.ntp_ucast_probes = probes;
687  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_UCAST_PROBES;
688  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
689 }
690 
691 /**
692  * Set the number of multicast probes of a neighbour table to the specified value
693  * @arg ntbl neighbour table to change
694  * @arg probes new probes value
695  */
696 void rtnl_neightbl_set_mcast_probes(struct rtnl_neightbl *ntbl, int probes)
697 {
698  ntbl->nt_parms.ntp_mcast_probes = probes;
699  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_MCAST_PROBES;
700  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
701 }
702 
703 /**
704  * Set the base reachable time of a neighbour table to the specified value
705  * @arg ntbl neighbour table to change
706  * @arg ms new base reachable time in milliseconds
707  */
708 void rtnl_neightbl_set_base_reachable_time(struct rtnl_neightbl *ntbl,
709  uint64_t ms)
710 {
711  ntbl->nt_parms.ntp_base_reachable_time = ms;
712  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_BASE_REACHABLE_TIME;
713  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
714 }
715 
716 /**
717  * Set the retransmit time of a neighbour table to the specified value
718  * @arg ntbl neighbour table to change
719  * @arg ms new retransmit time
720  */
721 void rtnl_neightbl_set_retrans_time(struct rtnl_neightbl *ntbl, uint64_t ms)
722 {
723  ntbl->nt_parms.ntp_retrans_time = ms;
724  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_RETRANS_TIME;
725  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
726 }
727 
728 /**
729  * Set the gc stale time of a neighbour table to the specified value
730  * @arg ntbl neighbour table to change
731  * @arg ms new gc stale time in milliseconds
732  */
733 void rtnl_neightbl_set_gc_stale_time(struct rtnl_neightbl *ntbl, uint64_t ms)
734 {
735  ntbl->nt_parms.ntp_gc_stale_time = ms;
736  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_GC_STALETIME;
737  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
738 }
739 
740 /**
741  * Set the first probe delay time of a neighbour table to the specified value
742  * @arg ntbl neighbour table to change
743  * @arg ms new first probe delay time in milliseconds
744  */
745 void rtnl_neightbl_set_delay_probe_time(struct rtnl_neightbl *ntbl, uint64_t ms)
746 {
747  ntbl->nt_parms.ntp_probe_delay = ms;
748  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_DELAY_PROBE_TIME;
749  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
750 }
751 
752 /**
753  * Set the anycast delay of a neighbour table to the specified value
754  * @arg ntbl neighbour table to change
755  * @arg ms new anycast delay in milliseconds
756  */
757 void rtnl_neightbl_set_anycast_delay(struct rtnl_neightbl *ntbl, uint64_t ms)
758 {
759  ntbl->nt_parms.ntp_anycast_delay = ms;
760  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_ANYCAST_DELAY;
761  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
762 }
763 
764 /**
765  * Set the proxy delay of a neighbour table to the specified value
766  * @arg ntbl neighbour table to change
767  * @arg ms new proxy delay in milliseconds
768  */
769 void rtnl_neightbl_set_proxy_delay(struct rtnl_neightbl *ntbl, uint64_t ms)
770 {
771  ntbl->nt_parms.ntp_proxy_delay = ms;
772  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_PROXY_DELAY;
773  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
774 }
775 
776 /**
777  * Set the locktime of a neighbour table to the specified value
778  * @arg ntbl neighbour table to change
779  * @arg ms new locktime in milliseconds
780  */
781 void rtnl_neightbl_set_locktime(struct rtnl_neightbl *ntbl, uint64_t ms)
782 {
783  ntbl->nt_parms.ntp_locktime = ms;
784  ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_LOCKTIME;
785  ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
786 }
787 
788 /** @} */
789 
790 static struct nl_object_ops neightbl_obj_ops = {
791  .oo_name = "route/neightbl",
792  .oo_size = sizeof(struct rtnl_neightbl),
793  .oo_dump[NL_DUMP_BRIEF] = neightbl_dump_brief,
794  .oo_dump[NL_DUMP_FULL] = neightbl_dump_full,
795  .oo_dump[NL_DUMP_STATS] = neightbl_dump_stats,
796  .oo_compare = neightbl_compare,
797 };
798 
799 static struct nl_cache_ops rtnl_neightbl_ops = {
800  .co_name = "route/neightbl",
801  .co_hdrsize = sizeof(struct rtgenmsg),
802  .co_msgtypes = {
803  { RTM_NEWNEIGHTBL, NL_ACT_NEW, "new" },
804  { RTM_SETNEIGHTBL, NL_ACT_SET, "set" },
805  { RTM_GETNEIGHTBL, NL_ACT_GET, "get" },
806  END_OF_MSGTYPES_LIST,
807  },
808  .co_protocol = NETLINK_ROUTE,
809  .co_request_update = neightbl_request_update,
810  .co_msg_parser = neightbl_msg_parser,
811  .co_obj_ops = &neightbl_obj_ops,
812 };
813 
814 static void __init neightbl_init(void)
815 {
816  nl_cache_mngt_register(&rtnl_neightbl_ops);
817 }
818 
819 static void __exit neightbl_exit(void)
820 {
821  nl_cache_mngt_unregister(&rtnl_neightbl_ops);
822 }
823 
824 /** @} */