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-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
neightbl_compare(struct nl_object * _a,struct nl_object * _b,uint32_t attrs,int flags)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
neightbl_msg_parser(struct nl_cache_ops * ops,struct sockaddr_nl * who,struct nlmsghdr * n,struct nl_parser_param * pp)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 return -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
neightbl_request_update(struct nl_cache * c,struct nl_sock * h)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
neightbl_dump_line(struct nl_object * arg,struct nl_dump_params * p)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("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 } else
249 nl_dump(p, "<%u> ", ntbl->nt_parms.ntp_ifindex);
250 } else
251 nl_dump(p, " ");
252
253 if (ntbl->ce_mask & NEIGHTBL_ATTR_CONFIG)
254 nl_dump(p, "entries %u ", ntbl->nt_config.ndtc_entries);
255
256 if (ntbl->ce_mask & NEIGHTBL_ATTR_PARMS) {
257 char rt[32], rt2[32];
258 struct rtnl_neightbl_parms *pa = &ntbl->nt_parms;
259
260 nl_dump(p, "reachable-time %s retransmit-time %s",
261 nl_msec2str(pa->ntp_reachable_time, rt, sizeof(rt)),
262 nl_msec2str(pa->ntp_retrans_time, rt2, sizeof(rt2)));
263 }
264
265 nl_dump(p, "\n");
266 }
267
neightbl_dump_details(struct nl_object * arg,struct nl_dump_params * p)268 static void neightbl_dump_details(struct nl_object *arg, struct nl_dump_params *p)
269 {
270 char x[32], y[32], z[32];
271 struct rtnl_neightbl *ntbl = (struct rtnl_neightbl *) arg;
272
273 neightbl_dump_line(arg, p);
274
275 if (ntbl->ce_mask & NEIGHTBL_ATTR_CONFIG) {
276 nl_dump_line(p, " key-len %u entry-size %u last-flush %s\n",
277 ntbl->nt_config.ndtc_key_len,
278 ntbl->nt_config.ndtc_entry_size,
279 nl_msec2str(ntbl->nt_config.ndtc_last_flush,
280 x, sizeof(x)));
281
282 nl_dump_line(p, " gc threshold %u/%u/%u interval %s " \
283 "chain-position %u\n",
284 ntbl->nt_gc_thresh1, ntbl->nt_gc_thresh2,
285 ntbl->nt_gc_thresh3,
286 nl_msec2str(ntbl->nt_gc_interval, x, sizeof(x)),
287 ntbl->nt_config.ndtc_hash_chain_gc);
288
289 nl_dump_line(p, " hash-rand 0x%08X/0x%08X last-rand %s\n",
290 ntbl->nt_config.ndtc_hash_rnd,
291 ntbl->nt_config.ndtc_hash_mask,
292 nl_msec2str(ntbl->nt_config.ndtc_last_rand,
293 x, sizeof(x)));
294 }
295
296 if (ntbl->ce_mask & NEIGHTBL_ATTR_PARMS) {
297 struct rtnl_neightbl_parms *pa = &ntbl->nt_parms;
298
299 nl_dump_line(p, " refcnt %u pending-queue-limit %u " \
300 "proxy-delayed-queue-limit %u\n",
301 pa->ntp_refcnt,
302 pa->ntp_queue_len,
303 pa->ntp_proxy_qlen);
304
305 nl_dump_line(p, " num-userspace-probes %u num-unicast-probes " \
306 "%u num-multicast-probes %u\n",
307 pa->ntp_app_probes,
308 pa->ntp_ucast_probes,
309 pa->ntp_mcast_probes);
310
311 nl_dump_line(p, " min-age %s base-reachable-time %s " \
312 "stale-check-interval %s\n",
313 nl_msec2str(pa->ntp_locktime, x, sizeof(x)),
314 nl_msec2str(pa->ntp_base_reachable_time,
315 y, sizeof(y)),
316 nl_msec2str(pa->ntp_gc_stale_time, z, sizeof(z)));
317
318 nl_dump_line(p, " initial-probe-delay %s answer-delay %s " \
319 "proxy-answer-delay %s\n",
320 nl_msec2str(pa->ntp_probe_delay, x, sizeof(x)),
321 nl_msec2str(pa->ntp_anycast_delay, y, sizeof(y)),
322 nl_msec2str(pa->ntp_proxy_delay, z, sizeof(z)));
323 }
324 }
325
neightbl_dump_stats(struct nl_object * arg,struct nl_dump_params * p)326 static void neightbl_dump_stats(struct nl_object *arg, struct nl_dump_params *p)
327 {
328 struct rtnl_neightbl *ntbl = (struct rtnl_neightbl *) arg;
329
330 neightbl_dump_details(arg, p);
331
332 if (!(ntbl->ce_mask & NEIGHTBL_ATTR_STATS))
333 return;
334
335 nl_dump_line(p, " lookups %lld hits %lld failed %lld " \
336 "allocations %lld destroys %lld\n",
337 ntbl->nt_stats.ndts_lookups,
338 ntbl->nt_stats.ndts_hits,
339 ntbl->nt_stats.ndts_res_failed,
340 ntbl->nt_stats.ndts_allocs,
341 ntbl->nt_stats.ndts_destroys);
342
343 nl_dump_line(p, " hash-grows %lld forced-gc-runs %lld " \
344 "periodic-gc-runs %lld\n",
345 ntbl->nt_stats.ndts_hash_grows,
346 ntbl->nt_stats.ndts_forced_gc_runs,
347 ntbl->nt_stats.ndts_periodic_gc_runs);
348
349 nl_dump_line(p, " rcv-unicast-probes %lld rcv-multicast-probes %lld\n",
350 ntbl->nt_stats.ndts_rcv_probes_ucast,
351 ntbl->nt_stats.ndts_rcv_probes_mcast);
352 }
353
354 /**
355 * @name Allocation/Freeing
356 * @{
357 */
358
rtnl_neightbl_alloc(void)359 struct rtnl_neightbl *rtnl_neightbl_alloc(void)
360 {
361 return (struct rtnl_neightbl *) nl_object_alloc(&neightbl_obj_ops);
362 }
363
rtnl_neightbl_put(struct rtnl_neightbl * neightbl)364 void rtnl_neightbl_put(struct rtnl_neightbl *neightbl)
365 {
366 nl_object_put((struct nl_object *) neightbl);
367 }
368
369 /** @} */
370
371 /**
372 * @name Neighbour Table Cache Management
373 * @{
374 */
375
376 /**
377 * Build a neighbour table cache including all neighbour tables currently configured in the kernel.
378 * @arg sk Netlink socket.
379 * @arg result Pointer to store resulting cache.
380 *
381 * Allocates a new neighbour table cache, initializes it properly and
382 * updates it to include all neighbour tables currently configured in
383 * the kernel.
384 *
385 * @return 0 on success or a negative error code.
386 */
rtnl_neightbl_alloc_cache(struct nl_sock * sk,struct nl_cache ** result)387 int rtnl_neightbl_alloc_cache(struct nl_sock *sk, struct nl_cache **result)
388 {
389 return nl_cache_alloc_and_fill(&rtnl_neightbl_ops, sk, result);
390 }
391
392 /**
393 * Lookup neighbour table by name and optional interface index
394 * @arg cache neighbour table cache
395 * @arg name name of table
396 * @arg ifindex optional interface index
397 *
398 * Looks up the neighbour table matching the specified name and
399 * optionally the specified ifindex to retrieve device specific
400 * parameter sets.
401 *
402 * @return ptr to neighbour table inside the cache or NULL if no
403 * match was found.
404 */
rtnl_neightbl_get(struct nl_cache * cache,const char * name,int ifindex)405 struct rtnl_neightbl *rtnl_neightbl_get(struct nl_cache *cache,
406 const char *name, int ifindex)
407 {
408 struct rtnl_neightbl *nt;
409
410 if (cache->c_ops != &rtnl_neightbl_ops)
411 return NULL;
412
413 nl_list_for_each_entry(nt, &cache->c_items, ce_list) {
414 if (!strcasecmp(nt->nt_name, name) &&
415 ((!ifindex && !nt->nt_parms.ntp_ifindex) ||
416 (ifindex && ifindex == nt->nt_parms.ntp_ifindex))) {
417 nl_object_get((struct nl_object *) nt);
418 return nt;
419 }
420 }
421
422 return NULL;
423 }
424
425 /** @} */
426
427 /**
428 * @name Neighbour Table Modifications
429 * @{
430 */
431
432 /**
433 * Builds a netlink change request message to change neighbour table attributes
434 * @arg old neighbour table to change
435 * @arg tmpl template with requested changes
436 * @arg result Pointer to store resulting message.
437 *
438 * Builds a new netlink message requesting a change of neighbour table
439 * attributes. The netlink message header isn't fully equipped with all
440 * relevant fields and must be sent out via nl_send_auto_complete() or
441 * supplemented as needed.
442 * \a old must point to a neighbour table currently configured in the
443 * kernel and \a tmpl must contain the attributes to be changed set via
444 * \c rtnl_neightbl_set_* functions.
445 *
446 * @return 0 on success or a negative error code.
447 */
rtnl_neightbl_build_change_request(struct rtnl_neightbl * old,struct rtnl_neightbl * tmpl,struct nl_msg ** result)448 int rtnl_neightbl_build_change_request(struct rtnl_neightbl *old,
449 struct rtnl_neightbl *tmpl,
450 struct nl_msg **result)
451 {
452 struct nl_msg *m, *parms = NULL;
453 struct ndtmsg ndt = {
454 .ndtm_family = old->nt_family,
455 };
456
457 m = nlmsg_alloc_simple(RTM_SETNEIGHTBL, 0);
458 if (!m)
459 return -NLE_NOMEM;
460
461 if (nlmsg_append(m, &ndt, sizeof(ndt), NLMSG_ALIGNTO) < 0)
462 goto nla_put_failure;
463
464 NLA_PUT_STRING(m, NDTA_NAME, old->nt_name);
465
466 if (tmpl->ce_mask & NEIGHTBL_ATTR_THRESH1)
467 NLA_PUT_U32(m, NDTA_THRESH1, tmpl->nt_gc_thresh1);
468
469 if (tmpl->ce_mask & NEIGHTBL_ATTR_THRESH2)
470 NLA_PUT_U32(m, NDTA_THRESH2, tmpl->nt_gc_thresh2);
471
472 if (tmpl->ce_mask & NEIGHTBL_ATTR_THRESH2)
473 NLA_PUT_U32(m, NDTA_THRESH2, tmpl->nt_gc_thresh2);
474
475 if (tmpl->ce_mask & NEIGHTBL_ATTR_GC_INTERVAL)
476 NLA_PUT_U64(m, NDTA_GC_INTERVAL,
477 tmpl->nt_gc_interval);
478
479 if (tmpl->ce_mask & NEIGHTBL_ATTR_PARMS) {
480 struct rtnl_neightbl_parms *p = &tmpl->nt_parms;
481
482 parms = nlmsg_alloc();
483 if (!parms)
484 goto nla_put_failure;
485
486 if (old->nt_parms.ntp_mask & NEIGHTBLPARM_ATTR_IFINDEX)
487 NLA_PUT_U32(parms, NDTPA_IFINDEX,
488 old->nt_parms.ntp_ifindex);
489
490
491 if (p->ntp_mask & NEIGHTBLPARM_ATTR_QUEUE_LEN)
492 NLA_PUT_U32(parms, NDTPA_QUEUE_LEN, p->ntp_queue_len);
493
494 if (p->ntp_mask & NEIGHTBLPARM_ATTR_APP_PROBES)
495 NLA_PUT_U32(parms, NDTPA_APP_PROBES, p->ntp_app_probes);
496
497 if (p->ntp_mask & NEIGHTBLPARM_ATTR_UCAST_PROBES)
498 NLA_PUT_U32(parms, NDTPA_UCAST_PROBES,
499 p->ntp_ucast_probes);
500
501 if (p->ntp_mask & NEIGHTBLPARM_ATTR_MCAST_PROBES)
502 NLA_PUT_U32(parms, NDTPA_MCAST_PROBES,
503 p->ntp_mcast_probes);
504
505 if (p->ntp_mask & NEIGHTBLPARM_ATTR_PROXY_QLEN)
506 NLA_PUT_U32(parms, NDTPA_PROXY_QLEN,
507 p->ntp_proxy_qlen);
508
509 if (p->ntp_mask & NEIGHTBLPARM_ATTR_BASE_REACHABLE_TIME)
510 NLA_PUT_U64(parms, NDTPA_BASE_REACHABLE_TIME,
511 p->ntp_base_reachable_time);
512
513 if (p->ntp_mask & NEIGHTBLPARM_ATTR_RETRANS_TIME)
514 NLA_PUT_U64(parms, NDTPA_RETRANS_TIME,
515 p->ntp_retrans_time);
516
517 if (p->ntp_mask & NEIGHTBLPARM_ATTR_GC_STALETIME)
518 NLA_PUT_U64(parms, NDTPA_GC_STALETIME,
519 p->ntp_gc_stale_time);
520
521 if (p->ntp_mask & NEIGHTBLPARM_ATTR_DELAY_PROBE_TIME)
522 NLA_PUT_U64(parms, NDTPA_DELAY_PROBE_TIME,
523 p->ntp_proxy_delay);
524
525 if (p->ntp_mask & NEIGHTBLPARM_ATTR_ANYCAST_DELAY)
526 NLA_PUT_U64(parms, NDTPA_ANYCAST_DELAY,
527 p->ntp_anycast_delay);
528
529 if (p->ntp_mask & NEIGHTBLPARM_ATTR_PROXY_DELAY)
530 NLA_PUT_U64(parms, NDTPA_PROXY_DELAY,
531 p->ntp_proxy_delay);
532
533 if (p->ntp_mask & NEIGHTBLPARM_ATTR_LOCKTIME)
534 NLA_PUT_U64(parms, NDTPA_LOCKTIME, p->ntp_locktime);
535
536 if (nla_put_nested(m, NDTA_PARMS, parms) < 0)
537 goto nla_put_failure;
538
539 nlmsg_free(parms);
540 }
541
542 *result = m;
543 return 0;
544
545 nla_put_failure:
546 if (parms)
547 nlmsg_free(parms);
548 nlmsg_free(m);
549 return -NLE_MSGSIZE;
550 }
551
552 /**
553 * Change neighbour table attributes
554 * @arg sk Netlink socket.
555 * @arg old neighbour table to be changed
556 * @arg tmpl template with requested changes
557 *
558 * Builds a new netlink message by calling
559 * rtnl_neightbl_build_change_request(), sends the request to the
560 * kernel and waits for the next ACK to be received, i.e. blocks
561 * until the request has been processed.
562 *
563 * @return 0 on success or a negative error code
564 */
rtnl_neightbl_change(struct nl_sock * sk,struct rtnl_neightbl * old,struct rtnl_neightbl * tmpl)565 int rtnl_neightbl_change(struct nl_sock *sk, struct rtnl_neightbl *old,
566 struct rtnl_neightbl *tmpl)
567 {
568 struct nl_msg *msg;
569 int err;
570
571 if ((err = rtnl_neightbl_build_change_request(old, tmpl, &msg)) < 0)
572 return err;
573
574 err = nl_send_auto_complete(sk, msg);
575 nlmsg_free(msg);
576 if (err < 0)
577 return err;
578
579 return wait_for_ack(sk);
580 }
581
582 /** @} */
583
584 /**
585 * @name Attribute Modification
586 * @{
587 */
588
rtnl_neightbl_set_family(struct rtnl_neightbl * ntbl,int family)589 void rtnl_neightbl_set_family(struct rtnl_neightbl *ntbl, int family)
590 {
591 ntbl->nt_family = family;
592 ntbl->ce_mask |= NEIGHTBL_ATTR_FAMILY;
593 }
594
rtnl_neightbl_set_gc_interval(struct rtnl_neightbl * ntbl,uint64_t ms)595 void rtnl_neightbl_set_gc_interval(struct rtnl_neightbl *ntbl, uint64_t ms)
596 {
597 ntbl->nt_gc_interval = ms;
598 ntbl->ce_mask |= NEIGHTBL_ATTR_GC_INTERVAL;
599 }
600
rtnl_neightbl_set_gc_tresh1(struct rtnl_neightbl * ntbl,int thresh)601 void rtnl_neightbl_set_gc_tresh1(struct rtnl_neightbl *ntbl, int thresh)
602 {
603 ntbl->nt_gc_thresh1 = thresh;
604 ntbl->ce_mask |= NEIGHTBL_ATTR_THRESH1;
605 }
606
rtnl_neightbl_set_gc_tresh2(struct rtnl_neightbl * ntbl,int thresh)607 void rtnl_neightbl_set_gc_tresh2(struct rtnl_neightbl *ntbl, int thresh)
608 {
609 ntbl->nt_gc_thresh2 = thresh;
610 ntbl->ce_mask |= NEIGHTBL_ATTR_THRESH2;
611 }
612
rtnl_neightbl_set_gc_tresh3(struct rtnl_neightbl * ntbl,int thresh)613 void rtnl_neightbl_set_gc_tresh3(struct rtnl_neightbl *ntbl, int thresh)
614 {
615 ntbl->nt_gc_thresh3 = thresh;
616 ntbl->ce_mask |= NEIGHTBL_ATTR_THRESH3;
617 }
618
rtnl_neightbl_set_name(struct rtnl_neightbl * ntbl,const char * name)619 void rtnl_neightbl_set_name(struct rtnl_neightbl *ntbl, const char *name)
620 {
621 strncpy(ntbl->nt_name, name, sizeof(ntbl->nt_name) - 1);
622 ntbl->ce_mask |= NEIGHTBL_ATTR_NAME;
623 }
624
rtnl_neightbl_set_dev(struct rtnl_neightbl * ntbl,int ifindex)625 void rtnl_neightbl_set_dev(struct rtnl_neightbl *ntbl, int ifindex)
626 {
627 ntbl->nt_parms.ntp_ifindex = ifindex;
628 ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_IFINDEX;
629 ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
630 }
631
632 /**
633 * Set the queue length for pending requests of a neighbour table to the specified value
634 * @arg ntbl neighbour table to change
635 * @arg len new queue len
636 */
rtnl_neightbl_set_queue_len(struct rtnl_neightbl * ntbl,int len)637 void rtnl_neightbl_set_queue_len(struct rtnl_neightbl *ntbl, int len)
638 {
639 ntbl->nt_parms.ntp_queue_len = len;
640 ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_QUEUE_LEN;
641 ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
642 }
643
644 /**
645 * Set the queue length for delay proxy arp requests of a neighbour table to the specified value
646 * @arg ntbl neighbour table to change
647 * @arg len new queue len
648 */
rtnl_neightbl_set_proxy_queue_len(struct rtnl_neightbl * ntbl,int len)649 void rtnl_neightbl_set_proxy_queue_len(struct rtnl_neightbl *ntbl, int len)
650 {
651 ntbl->nt_parms.ntp_proxy_qlen = len;
652 ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_PROXY_QLEN;
653 ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
654 }
655
656 /**
657 * Set the number of application probes of a neighbour table to the specified value
658 * @arg ntbl neighbour table to change
659 * @arg probes new probes value
660 */
rtnl_neightbl_set_app_probes(struct rtnl_neightbl * ntbl,int probes)661 void rtnl_neightbl_set_app_probes(struct rtnl_neightbl *ntbl, int probes)
662 {
663 ntbl->nt_parms.ntp_app_probes = probes;
664 ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_APP_PROBES;
665 ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
666 }
667
668 /**
669 * Set the number of unicast probes of a neighbour table to the specified value
670 * @arg ntbl neighbour table to change
671 * @arg probes new probes value
672 */
rtnl_neightbl_set_ucast_probes(struct rtnl_neightbl * ntbl,int probes)673 void rtnl_neightbl_set_ucast_probes(struct rtnl_neightbl *ntbl, int probes)
674 {
675 ntbl->nt_parms.ntp_ucast_probes = probes;
676 ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_UCAST_PROBES;
677 ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
678 }
679
680 /**
681 * Set the number of multicast probes of a neighbour table to the specified value
682 * @arg ntbl neighbour table to change
683 * @arg probes new probes value
684 */
rtnl_neightbl_set_mcast_probes(struct rtnl_neightbl * ntbl,int probes)685 void rtnl_neightbl_set_mcast_probes(struct rtnl_neightbl *ntbl, int probes)
686 {
687 ntbl->nt_parms.ntp_mcast_probes = probes;
688 ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_MCAST_PROBES;
689 ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
690 }
691
692 /**
693 * Set the base reachable time of a neighbour table to the specified value
694 * @arg ntbl neighbour table to change
695 * @arg ms new base reachable time in milliseconds
696 */
rtnl_neightbl_set_base_reachable_time(struct rtnl_neightbl * ntbl,uint64_t ms)697 void rtnl_neightbl_set_base_reachable_time(struct rtnl_neightbl *ntbl,
698 uint64_t ms)
699 {
700 ntbl->nt_parms.ntp_base_reachable_time = ms;
701 ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_BASE_REACHABLE_TIME;
702 ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
703 }
704
705 /**
706 * Set the retransmit time of a neighbour table to the specified value
707 * @arg ntbl neighbour table to change
708 * @arg ms new retransmit time
709 */
rtnl_neightbl_set_retrans_time(struct rtnl_neightbl * ntbl,uint64_t ms)710 void rtnl_neightbl_set_retrans_time(struct rtnl_neightbl *ntbl, uint64_t ms)
711 {
712 ntbl->nt_parms.ntp_retrans_time = ms;
713 ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_RETRANS_TIME;
714 ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
715 }
716
717 /**
718 * Set the gc stale time of a neighbour table to the specified value
719 * @arg ntbl neighbour table to change
720 * @arg ms new gc stale time in milliseconds
721 */
rtnl_neightbl_set_gc_stale_time(struct rtnl_neightbl * ntbl,uint64_t ms)722 void rtnl_neightbl_set_gc_stale_time(struct rtnl_neightbl *ntbl, uint64_t ms)
723 {
724 ntbl->nt_parms.ntp_gc_stale_time = ms;
725 ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_GC_STALETIME;
726 ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
727 }
728
729 /**
730 * Set the first probe delay time of a neighbour table to the specified value
731 * @arg ntbl neighbour table to change
732 * @arg ms new first probe delay time in milliseconds
733 */
rtnl_neightbl_set_delay_probe_time(struct rtnl_neightbl * ntbl,uint64_t ms)734 void rtnl_neightbl_set_delay_probe_time(struct rtnl_neightbl *ntbl, uint64_t ms)
735 {
736 ntbl->nt_parms.ntp_probe_delay = ms;
737 ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_DELAY_PROBE_TIME;
738 ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
739 }
740
741 /**
742 * Set the anycast delay of a neighbour table to the specified value
743 * @arg ntbl neighbour table to change
744 * @arg ms new anycast delay in milliseconds
745 */
rtnl_neightbl_set_anycast_delay(struct rtnl_neightbl * ntbl,uint64_t ms)746 void rtnl_neightbl_set_anycast_delay(struct rtnl_neightbl *ntbl, uint64_t ms)
747 {
748 ntbl->nt_parms.ntp_anycast_delay = ms;
749 ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_ANYCAST_DELAY;
750 ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
751 }
752
753 /**
754 * Set the proxy delay of a neighbour table to the specified value
755 * @arg ntbl neighbour table to change
756 * @arg ms new proxy delay in milliseconds
757 */
rtnl_neightbl_set_proxy_delay(struct rtnl_neightbl * ntbl,uint64_t ms)758 void rtnl_neightbl_set_proxy_delay(struct rtnl_neightbl *ntbl, uint64_t ms)
759 {
760 ntbl->nt_parms.ntp_proxy_delay = ms;
761 ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_PROXY_DELAY;
762 ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
763 }
764
765 /**
766 * Set the locktime of a neighbour table to the specified value
767 * @arg ntbl neighbour table to change
768 * @arg ms new locktime in milliseconds
769 */
rtnl_neightbl_set_locktime(struct rtnl_neightbl * ntbl,uint64_t ms)770 void rtnl_neightbl_set_locktime(struct rtnl_neightbl *ntbl, uint64_t ms)
771 {
772 ntbl->nt_parms.ntp_locktime = ms;
773 ntbl->nt_parms.ntp_mask |= NEIGHTBLPARM_ATTR_LOCKTIME;
774 ntbl->ce_mask |= NEIGHTBL_ATTR_PARMS;
775 }
776
777 /** @} */
778
779 static struct nl_object_ops neightbl_obj_ops = {
780 .oo_name = "route/neightbl",
781 .oo_size = sizeof(struct rtnl_neightbl),
782 .oo_dump = {
783 [NL_DUMP_LINE] = neightbl_dump_line,
784 [NL_DUMP_DETAILS] = neightbl_dump_details,
785 [NL_DUMP_STATS] = neightbl_dump_stats,
786 },
787 .oo_compare = neightbl_compare,
788 };
789
790 static struct nl_cache_ops rtnl_neightbl_ops = {
791 .co_name = "route/neightbl",
792 .co_hdrsize = sizeof(struct rtgenmsg),
793 .co_msgtypes = {
794 { RTM_NEWNEIGHTBL, NL_ACT_NEW, "new" },
795 { RTM_SETNEIGHTBL, NL_ACT_SET, "set" },
796 { RTM_GETNEIGHTBL, NL_ACT_GET, "get" },
797 END_OF_MSGTYPES_LIST,
798 },
799 .co_protocol = NETLINK_ROUTE,
800 .co_request_update = neightbl_request_update,
801 .co_msg_parser = neightbl_msg_parser,
802 .co_obj_ops = &neightbl_obj_ops,
803 };
804
neightbl_init(void)805 static void __init neightbl_init(void)
806 {
807 nl_cache_mngt_register(&rtnl_neightbl_ops);
808 }
809
neightbl_exit(void)810 static void __exit neightbl_exit(void)
811 {
812 nl_cache_mngt_unregister(&rtnl_neightbl_ops);
813 }
814
815 /** @} */
816