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361b5843 | 1 | /* |
2 | * pim_bsm.c: PIM BSM handling routines | |
3 | * | |
4 | * Copyright (C) 2018-19 Vmware, Inc. | |
5 | * Saravanan K | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; see the file COPYING; if not, write to the | |
19 | * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, | |
20 | * MA 02110-1301 USA | |
21 | */ | |
2618a52e DL |
22 | |
23 | #ifdef HAVE_CONFIG_H | |
24 | #include "config.h" | |
25 | #endif | |
26 | ||
361b5843 | 27 | #include "if.h" |
28 | #include "pimd.h" | |
29 | #include "pim_iface.h" | |
361b5843 | 30 | #include "pim_instance.h" |
e34e07e6 | 31 | #include "pim_neighbor.h" |
361b5843 | 32 | #include "pim_rpf.h" |
33 | #include "pim_hello.h" | |
34 | #include "pim_pim.h" | |
35 | #include "pim_nht.h" | |
36 | #include "pim_bsm.h" | |
37 | #include "pim_time.h" | |
62596d9a | 38 | #include "pim_zebra.h" |
c6ced474 | 39 | #include "pim_util.h" |
361b5843 | 40 | |
41 | /* Functions forward declaration */ | |
42 | static void pim_bs_timer_start(struct bsm_scope *scope, int bs_timeout); | |
a5164e97 | 43 | static void pim_g2rp_timer_start(struct bsm_rpinfo *bsrp, int hold_time); |
44 | static inline void pim_g2rp_timer_restart(struct bsm_rpinfo *bsrp, | |
45 | int hold_time); | |
23255dfd | 46 | |
47 | /* Memory Types */ | |
bf8d3d6a | 48 | DEFINE_MTYPE_STATIC(PIMD, PIM_BSGRP_NODE, "PIM BSR advertised grp info"); |
fdab2940 | 49 | DEFINE_MTYPE_STATIC(PIMD, PIM_BSRP_INFO, "PIM BSR advertised RP info"); |
d4a4525c | 50 | DEFINE_MTYPE_STATIC(PIMD, PIM_BSM_FRAG, "PIM BSM fragment"); |
bf8d3d6a | 51 | DEFINE_MTYPE_STATIC(PIMD, PIM_BSM_PKT_VAR_MEM, "PIM BSM Packet"); |
361b5843 | 52 | |
79d97386 | 53 | /* All bsm packets forwarded shall be fit within ip mtu less iphdr(max) */ |
54 | #define MAX_IP_HDR_LEN 24 | |
55 | ||
16c926c8 | 56 | /* pim_bsm_write_config - Write the interface pim bsm configuration.*/ |
d0e418b4 | 57 | void pim_bsm_write_config(struct vty *vty, struct interface *ifp) |
16c926c8 | 58 | { |
59 | struct pim_interface *pim_ifp = ifp->info; | |
60 | ||
61 | if (pim_ifp) { | |
62 | if (!pim_ifp->bsm_enable) | |
d17b6892 | 63 | vty_out(vty, " no " PIM_AF_NAME " pim bsm\n"); |
16c926c8 | 64 | if (!pim_ifp->ucast_bsm_accept) |
d17b6892 | 65 | vty_out(vty, " no " PIM_AF_NAME " pim unicast-bsm\n"); |
16c926c8 | 66 | } |
67 | } | |
68 | ||
fdab2940 DL |
69 | static void pim_bsm_rpinfo_free(struct bsm_rpinfo *bsrp_info) |
70 | { | |
71 | THREAD_OFF(bsrp_info->g2rp_timer); | |
72 | XFREE(MTYPE_PIM_BSRP_INFO, bsrp_info); | |
73 | } | |
74 | ||
b09bd804 | 75 | static void pim_bsm_rpinfos_free(struct bsm_rpinfos_head *head) |
fdab2940 DL |
76 | { |
77 | struct bsm_rpinfo *bsrp_info; | |
78 | ||
79 | while ((bsrp_info = bsm_rpinfos_pop(head))) | |
80 | pim_bsm_rpinfo_free(bsrp_info); | |
81 | } | |
82 | ||
b09bd804 | 83 | static void pim_free_bsgrp_data(struct bsgrp_node *bsgrp_node) |
361b5843 | 84 | { |
fdab2940 DL |
85 | pim_bsm_rpinfos_free(bsgrp_node->bsrp_list); |
86 | pim_bsm_rpinfos_free(bsgrp_node->partial_bsrp_list); | |
361b5843 | 87 | XFREE(MTYPE_PIM_BSGRP_NODE, bsgrp_node); |
88 | } | |
89 | ||
b09bd804 | 90 | static void pim_free_bsgrp_node(struct route_table *rt, struct prefix *grp) |
c295e391 | 91 | { |
92 | struct route_node *rn; | |
93 | ||
94 | rn = route_node_lookup(rt, grp); | |
95 | if (rn) { | |
96 | rn->info = NULL; | |
97 | route_unlock_node(rn); | |
98 | route_unlock_node(rn); | |
99 | } | |
100 | } | |
101 | ||
d4a4525c | 102 | static void pim_bsm_frag_free(struct bsm_frag *bsfrag) |
361b5843 | 103 | { |
d4a4525c DL |
104 | XFREE(MTYPE_PIM_BSM_FRAG, bsfrag); |
105 | } | |
106 | ||
b09bd804 | 107 | static void pim_bsm_frags_free(struct bsm_scope *scope) |
d4a4525c DL |
108 | { |
109 | struct bsm_frag *bsfrag; | |
110 | ||
111 | while ((bsfrag = bsm_frags_pop(scope->bsm_frags))) | |
112 | pim_bsm_frag_free(bsfrag); | |
361b5843 | 113 | } |
114 | ||
fdab2940 DL |
115 | int pim_bsm_rpinfo_cmp(const struct bsm_rpinfo *node1, |
116 | const struct bsm_rpinfo *node2) | |
7b3e6ba1 | 117 | { |
118 | /* RP election Algo : | |
119 | * Step-1 : Loweset Rp priority will have higher precedance. | |
120 | * Step-2 : If priority same then higher hash val will have | |
121 | * higher precedance. | |
122 | * Step-3 : If Hash val is same then highest rp address will | |
123 | * become elected RP. | |
124 | */ | |
125 | if (node1->rp_prio < node2->rp_prio) | |
126 | return -1; | |
127 | if (node1->rp_prio > node2->rp_prio) | |
128 | return 1; | |
129 | if (node1->hash < node2->hash) | |
130 | return 1; | |
131 | if (node1->hash > node2->hash) | |
132 | return -1; | |
1407e40f | 133 | return pim_addr_cmp(node2->rp_address, node1->rp_address); |
7b3e6ba1 | 134 | } |
135 | ||
7b3e6ba1 | 136 | static struct bsgrp_node *pim_bsm_new_bsgrp_node(struct route_table *rt, |
137 | struct prefix *grp) | |
138 | { | |
139 | struct route_node *rn; | |
140 | struct bsgrp_node *bsgrp; | |
141 | ||
142 | rn = route_node_get(rt, grp); | |
143 | if (!rn) { | |
15569c58 | 144 | zlog_warn("%s: route node creation failed", __func__); |
7b3e6ba1 | 145 | return NULL; |
146 | } | |
147 | bsgrp = XCALLOC(MTYPE_PIM_BSGRP_NODE, sizeof(struct bsgrp_node)); | |
148 | ||
7b3e6ba1 | 149 | rn->info = bsgrp; |
fdab2940 DL |
150 | bsm_rpinfos_init(bsgrp->bsrp_list); |
151 | bsm_rpinfos_init(bsgrp->partial_bsrp_list); | |
7b3e6ba1 | 152 | |
153 | prefix_copy(&bsgrp->group, grp); | |
154 | return bsgrp; | |
155 | } | |
156 | ||
cc9f21da | 157 | static void pim_on_bs_timer(struct thread *t) |
23255dfd | 158 | { |
c843f56d | 159 | struct route_node *rn; |
160 | struct bsm_scope *scope; | |
161 | struct bsgrp_node *bsgrp_node; | |
162 | struct bsm_rpinfo *bsrp; | |
c843f56d | 163 | |
164 | scope = THREAD_ARG(t); | |
165 | THREAD_OFF(scope->bs_timer); | |
166 | ||
167 | if (PIM_DEBUG_BSM) | |
168 | zlog_debug("%s: Bootstrap Timer expired for scope: %d", | |
15569c58 | 169 | __func__, scope->sz_id); |
c843f56d | 170 | |
5f010b12 | 171 | pim_nht_bsr_del(scope->pim, scope->current_bsr); |
c843f56d | 172 | /* Reset scope zone data */ |
173 | scope->accept_nofwd_bsm = false; | |
174 | scope->state = ACCEPT_ANY; | |
e309769a | 175 | scope->current_bsr = PIMADDR_ANY; |
c843f56d | 176 | scope->current_bsr_prio = 0; |
177 | scope->current_bsr_first_ts = 0; | |
178 | scope->current_bsr_last_ts = 0; | |
179 | scope->bsm_frag_tag = 0; | |
d4a4525c | 180 | pim_bsm_frags_free(scope); |
c843f56d | 181 | |
182 | for (rn = route_top(scope->bsrp_table); rn; rn = route_next(rn)) { | |
183 | ||
184 | bsgrp_node = (struct bsgrp_node *)rn->info; | |
185 | if (!bsgrp_node) { | |
186 | if (PIM_DEBUG_BSM) | |
15569c58 | 187 | zlog_debug("%s: bsgrp_node is null", __func__); |
c843f56d | 188 | continue; |
189 | } | |
190 | /* Give grace time for rp to continue for another hold time */ | |
fdab2940 DL |
191 | bsrp = bsm_rpinfos_first(bsgrp_node->bsrp_list); |
192 | if (bsrp) | |
c843f56d | 193 | pim_g2rp_timer_restart(bsrp, bsrp->rp_holdtime); |
fdab2940 | 194 | |
c843f56d | 195 | /* clear pending list */ |
fdab2940 DL |
196 | pim_bsm_rpinfos_free(bsgrp_node->partial_bsrp_list); |
197 | bsgrp_node->pend_rp_cnt = 0; | |
c843f56d | 198 | } |
23255dfd | 199 | } |
200 | ||
b09bd804 | 201 | static void pim_bs_timer_stop(struct bsm_scope *scope) |
23255dfd | 202 | { |
203 | if (PIM_DEBUG_BSM) | |
15569c58 DA |
204 | zlog_debug("%s : BS timer being stopped of sz: %d", __func__, |
205 | scope->sz_id); | |
23255dfd | 206 | THREAD_OFF(scope->bs_timer); |
207 | } | |
208 | ||
209 | static void pim_bs_timer_start(struct bsm_scope *scope, int bs_timeout) | |
210 | { | |
211 | if (!scope) { | |
212 | if (PIM_DEBUG_BSM) | |
15569c58 | 213 | zlog_debug("%s : Invalid scope(NULL).", __func__); |
23255dfd | 214 | return; |
215 | } | |
216 | THREAD_OFF(scope->bs_timer); | |
217 | if (PIM_DEBUG_BSM) | |
15569c58 DA |
218 | zlog_debug( |
219 | "%s : starting bs timer for scope %d with timeout %d secs", | |
220 | __func__, scope->sz_id, bs_timeout); | |
23255dfd | 221 | thread_add_timer(router->master, pim_on_bs_timer, scope, bs_timeout, |
222 | &scope->bs_timer); | |
223 | } | |
224 | ||
5acde1cf | 225 | static inline void pim_bs_timer_restart(struct bsm_scope *scope, int bs_timeout) |
226 | { | |
227 | pim_bs_timer_start(scope, bs_timeout); | |
228 | } | |
229 | ||
361b5843 | 230 | void pim_bsm_proc_init(struct pim_instance *pim) |
231 | { | |
232 | memset(&pim->global_scope, 0, sizeof(struct bsm_scope)); | |
233 | ||
234 | pim->global_scope.sz_id = PIM_GBL_SZ_ID; | |
235 | pim->global_scope.bsrp_table = route_table_init(); | |
236 | pim->global_scope.accept_nofwd_bsm = true; | |
237 | pim->global_scope.state = NO_INFO; | |
238 | pim->global_scope.pim = pim; | |
d4a4525c | 239 | bsm_frags_init(pim->global_scope.bsm_frags); |
361b5843 | 240 | pim_bs_timer_start(&pim->global_scope, PIM_BS_TIME); |
241 | } | |
242 | ||
243 | void pim_bsm_proc_free(struct pim_instance *pim) | |
244 | { | |
245 | struct route_node *rn; | |
246 | struct bsgrp_node *bsgrp; | |
247 | ||
248 | pim_bs_timer_stop(&pim->global_scope); | |
d4a4525c | 249 | pim_bsm_frags_free(&pim->global_scope); |
361b5843 | 250 | |
d0e418b4 | 251 | for (rn = route_top(pim->global_scope.bsrp_table); rn; |
252 | rn = route_next(rn)) { | |
361b5843 | 253 | bsgrp = rn->info; |
254 | if (!bsgrp) | |
255 | continue; | |
256 | pim_free_bsgrp_data(bsgrp); | |
257 | } | |
258 | ||
4d19a911 | 259 | route_table_finish(pim->global_scope.bsrp_table); |
361b5843 | 260 | } |
261 | ||
c295e391 | 262 | static bool is_hold_time_elapsed(void *data) |
263 | { | |
264 | struct bsm_rpinfo *bsrp; | |
265 | ||
266 | bsrp = data; | |
267 | ||
268 | if (bsrp->elapse_time < bsrp->rp_holdtime) | |
269 | return false; | |
270 | else | |
271 | return true; | |
272 | } | |
273 | ||
cc9f21da | 274 | static void pim_on_g2rp_timer(struct thread *t) |
a5164e97 | 275 | { |
c295e391 | 276 | struct bsm_rpinfo *bsrp; |
277 | struct bsm_rpinfo *bsrp_node; | |
278 | struct bsgrp_node *bsgrp_node; | |
c295e391 | 279 | struct pim_instance *pim; |
280 | struct rp_info *rp_info; | |
281 | struct route_node *rn; | |
282 | uint16_t elapse; | |
9dca52b9 | 283 | pim_addr bsrp_addr; |
c295e391 | 284 | |
285 | bsrp = THREAD_ARG(t); | |
286 | THREAD_OFF(bsrp->g2rp_timer); | |
287 | bsgrp_node = bsrp->bsgrp_node; | |
288 | ||
289 | /* elapse time is the hold time of expired node */ | |
290 | elapse = bsrp->rp_holdtime; | |
291 | bsrp_addr = bsrp->rp_address; | |
292 | ||
293 | /* update elapse for all bsrp nodes */ | |
fdab2940 | 294 | frr_each_safe (bsm_rpinfos, bsgrp_node->bsrp_list, bsrp_node) { |
c295e391 | 295 | bsrp_node->elapse_time += elapse; |
296 | ||
fdab2940 DL |
297 | if (is_hold_time_elapsed(bsrp_node)) { |
298 | bsm_rpinfos_del(bsgrp_node->bsrp_list, bsrp_node); | |
299 | pim_bsm_rpinfo_free(bsrp_node); | |
300 | } | |
301 | } | |
c295e391 | 302 | |
303 | /* Get the next elected rp node */ | |
fdab2940 | 304 | bsrp = bsm_rpinfos_first(bsgrp_node->bsrp_list); |
c295e391 | 305 | pim = bsgrp_node->scope->pim; |
306 | rn = route_node_lookup(pim->rp_table, &bsgrp_node->group); | |
307 | ||
308 | if (!rn) { | |
5e81f5dd | 309 | zlog_warn("%s: Route node doesn't exist", __func__); |
cc9f21da | 310 | return; |
c295e391 | 311 | } |
312 | ||
313 | rp_info = (struct rp_info *)rn->info; | |
314 | ||
315 | if (!rp_info) { | |
316 | route_unlock_node(rn); | |
cc9f21da | 317 | return; |
c295e391 | 318 | } |
319 | ||
320 | if (rp_info->rp_src != RP_SRC_STATIC) { | |
321 | /* If new rp available, change it else delete the existing */ | |
322 | if (bsrp) { | |
c295e391 | 323 | pim_g2rp_timer_start( |
324 | bsrp, (bsrp->rp_holdtime - bsrp->elapse_time)); | |
49b7b2c4 | 325 | pim_rp_change(pim, bsrp->rp_address, bsgrp_node->group, |
c295e391 | 326 | RP_SRC_BSR); |
327 | } else { | |
328 | pim_rp_del(pim, bsrp_addr, bsgrp_node->group, NULL, | |
329 | RP_SRC_BSR); | |
330 | } | |
331 | } | |
332 | ||
fdab2940 DL |
333 | if (!bsm_rpinfos_count(bsgrp_node->bsrp_list) |
334 | && !bsm_rpinfos_count(bsgrp_node->partial_bsrp_list)) { | |
c295e391 | 335 | pim_free_bsgrp_node(pim->global_scope.bsrp_table, |
336 | &bsgrp_node->group); | |
337 | pim_free_bsgrp_data(bsgrp_node); | |
338 | } | |
a5164e97 | 339 | } |
340 | ||
341 | static void pim_g2rp_timer_start(struct bsm_rpinfo *bsrp, int hold_time) | |
342 | { | |
343 | if (!bsrp) { | |
344 | if (PIM_DEBUG_BSM) | |
15569c58 | 345 | zlog_debug("%s : Invalid brsp(NULL).", __func__); |
a5164e97 | 346 | return; |
347 | } | |
348 | THREAD_OFF(bsrp->g2rp_timer); | |
2dbe669b | 349 | if (PIM_DEBUG_BSM) |
a5164e97 | 350 | zlog_debug( |
11e1593f | 351 | "%s : starting g2rp timer for grp: %pFX - rp: %pPAs with timeout %d secs(Actual Hold time : %d secs)", |
352 | __func__, &bsrp->bsgrp_node->group, &bsrp->rp_address, | |
353 | hold_time, bsrp->rp_holdtime); | |
a5164e97 | 354 | |
355 | thread_add_timer(router->master, pim_on_g2rp_timer, bsrp, hold_time, | |
356 | &bsrp->g2rp_timer); | |
357 | } | |
358 | ||
359 | static inline void pim_g2rp_timer_restart(struct bsm_rpinfo *bsrp, | |
360 | int hold_time) | |
361 | { | |
362 | pim_g2rp_timer_start(bsrp, hold_time); | |
363 | } | |
364 | ||
20fd30e5 | 365 | static void pim_g2rp_timer_stop(struct bsm_rpinfo *bsrp) |
366 | { | |
367 | if (!bsrp) | |
368 | return; | |
369 | ||
2dbe669b | 370 | if (PIM_DEBUG_BSM) |
11e1593f | 371 | zlog_debug("%s : stopping g2rp timer for grp: %pFX - rp: %pPAs", |
2dbe669b | 372 | __func__, &bsrp->bsgrp_node->group, |
ee2bbf7c | 373 | &bsrp->rp_address); |
20fd30e5 | 374 | |
375 | THREAD_OFF(bsrp->g2rp_timer); | |
376 | } | |
377 | ||
378 | static bool is_hold_time_zero(void *data) | |
379 | { | |
380 | struct bsm_rpinfo *bsrp; | |
381 | ||
382 | bsrp = data; | |
383 | ||
384 | if (bsrp->rp_holdtime) | |
385 | return false; | |
386 | else | |
387 | return true; | |
388 | } | |
389 | ||
390 | static void pim_instate_pend_list(struct bsgrp_node *bsgrp_node) | |
391 | { | |
392 | struct bsm_rpinfo *active; | |
393 | struct bsm_rpinfo *pend; | |
20fd30e5 | 394 | struct rp_info *rp_info; |
395 | struct route_node *rn; | |
396 | struct pim_instance *pim; | |
397 | struct rp_info *rp_all; | |
398 | struct prefix group_all; | |
399 | bool had_rp_node = true; | |
400 | ||
401 | pim = bsgrp_node->scope->pim; | |
fdab2940 | 402 | active = bsm_rpinfos_first(bsgrp_node->bsrp_list); |
20fd30e5 | 403 | |
404 | /* Remove nodes with hold time 0 & check if list still has a head */ | |
5f1808ac DS |
405 | frr_each_safe (bsm_rpinfos, bsgrp_node->partial_bsrp_list, pend) { |
406 | if (is_hold_time_zero(pend)) { | |
fdab2940 | 407 | bsm_rpinfos_del(bsgrp_node->partial_bsrp_list, pend); |
5f1808ac DS |
408 | pim_bsm_rpinfo_free(pend); |
409 | } | |
410 | } | |
fdab2940 DL |
411 | |
412 | pend = bsm_rpinfos_first(bsgrp_node->partial_bsrp_list); | |
20fd30e5 | 413 | |
c6ced474 | 414 | if (!pim_get_all_mcast_group(&group_all)) |
20fd30e5 | 415 | return; |
416 | ||
417 | rp_all = pim_rp_find_match_group(pim, &group_all); | |
418 | rn = route_node_lookup(pim->rp_table, &bsgrp_node->group); | |
419 | ||
420 | if (pend) | |
421 | pim_g2rp_timer_start(pend, pend->rp_holdtime); | |
422 | ||
423 | /* if rp node doesn't exist or exist but not configured(rp_all), | |
424 | * install the rp from head(if exists) of partial list. List is | |
425 | * is sorted such that head is the elected RP for the group. | |
426 | */ | |
cc144e8b | 427 | if (!rn || (prefix_same(&rp_all->group, &bsgrp_node->group) && |
428 | pim_rpf_addr_is_inaddr_any(&rp_all->rp))) { | |
20fd30e5 | 429 | if (PIM_DEBUG_BSM) |
15569c58 | 430 | zlog_debug("%s: Route node doesn't exist", __func__); |
20fd30e5 | 431 | if (pend) |
432 | pim_rp_new(pim, pend->rp_address, bsgrp_node->group, | |
433 | NULL, RP_SRC_BSR); | |
434 | had_rp_node = false; | |
435 | } else { | |
436 | rp_info = (struct rp_info *)rn->info; | |
437 | if (!rp_info) { | |
438 | route_unlock_node(rn); | |
439 | if (pend) | |
440 | pim_rp_new(pim, pend->rp_address, | |
441 | bsgrp_node->group, NULL, RP_SRC_BSR); | |
442 | had_rp_node = false; | |
443 | } | |
444 | } | |
445 | ||
446 | /* We didn't have rp node and pending list is empty(unlikely), cleanup*/ | |
447 | if ((!had_rp_node) && (!pend)) { | |
448 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, | |
449 | &bsgrp_node->group); | |
450 | pim_free_bsgrp_data(bsgrp_node); | |
451 | return; | |
452 | } | |
453 | ||
454 | if ((had_rp_node) && (rp_info->rp_src != RP_SRC_STATIC)) { | |
455 | /* This means we searched and got rp node, needs unlock */ | |
456 | route_unlock_node(rn); | |
457 | ||
458 | if (active && pend) { | |
11e1593f | 459 | if (pim_addr_cmp(active->rp_address, pend->rp_address)) |
20fd30e5 | 460 | pim_rp_change(pim, pend->rp_address, |
461 | bsgrp_node->group, RP_SRC_BSR); | |
462 | } | |
463 | ||
464 | /* Possible when the first BSM has group with 0 rp count */ | |
465 | if ((!active) && (!pend)) { | |
466 | if (PIM_DEBUG_BSM) { | |
467 | zlog_debug( | |
468 | "%s: Both bsrp and partial list are empty", | |
15569c58 | 469 | __func__); |
20fd30e5 | 470 | } |
471 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, | |
472 | &bsgrp_node->group); | |
473 | pim_free_bsgrp_data(bsgrp_node); | |
474 | return; | |
475 | } | |
476 | ||
477 | /* Possible when a group with 0 rp count received in BSM */ | |
478 | if ((active) && (!pend)) { | |
479 | pim_rp_del(pim, active->rp_address, bsgrp_node->group, | |
480 | NULL, RP_SRC_BSR); | |
481 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, | |
482 | &bsgrp_node->group); | |
483 | if (PIM_DEBUG_BSM) { | |
484 | zlog_debug("%s:Pend List is null,del grp node", | |
15569c58 | 485 | __func__); |
20fd30e5 | 486 | } |
487 | pim_free_bsgrp_data(bsgrp_node); | |
488 | return; | |
489 | } | |
490 | } | |
491 | ||
492 | if ((had_rp_node) && (rp_info->rp_src == RP_SRC_STATIC)) { | |
493 | /* We need to unlock rn this case */ | |
494 | route_unlock_node(rn); | |
495 | /* there is a chance that static rp exist and bsrp cleaned | |
496 | * so clean bsgrp node if pending list empty | |
497 | */ | |
498 | if (!pend) { | |
499 | if (PIM_DEBUG_BSM) | |
500 | zlog_debug( | |
501 | "%s: Partial list is empty, static rp exists", | |
15569c58 | 502 | __func__); |
20fd30e5 | 503 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, |
504 | &bsgrp_node->group); | |
505 | pim_free_bsgrp_data(bsgrp_node); | |
506 | return; | |
507 | } | |
508 | } | |
509 | ||
510 | /* swap the list & delete all nodes in partial list (old bsrp_list) | |
511 | * before swap | |
512 | * active is head of bsrp list | |
513 | * pend is head of partial list | |
514 | * After swap | |
515 | * active is head of partial list | |
516 | * pend is head of bsrp list | |
517 | * So check appriate head after swap and clean the new partial list | |
518 | */ | |
fdab2940 DL |
519 | bsm_rpinfos_swap_all(bsgrp_node->bsrp_list, |
520 | bsgrp_node->partial_bsrp_list); | |
20fd30e5 | 521 | |
fdab2940 | 522 | if (active) |
20fd30e5 | 523 | pim_g2rp_timer_stop(active); |
fdab2940 | 524 | pim_bsm_rpinfos_free(bsgrp_node->partial_bsrp_list); |
20fd30e5 | 525 | } |
526 | ||
e309769a | 527 | static bool is_preferred_bsr(struct pim_instance *pim, pim_addr bsr, |
5acde1cf | 528 | uint32_t bsr_prio) |
529 | { | |
e309769a | 530 | if (!pim_addr_cmp(bsr, pim->global_scope.current_bsr)) |
5acde1cf | 531 | return true; |
532 | ||
533 | if (bsr_prio > pim->global_scope.current_bsr_prio) | |
534 | return true; | |
535 | ||
536 | else if (bsr_prio == pim->global_scope.current_bsr_prio) { | |
e309769a | 537 | if (pim_addr_cmp(bsr, pim->global_scope.current_bsr) >= 0) |
5acde1cf | 538 | return true; |
539 | else | |
540 | return false; | |
541 | } else | |
542 | return false; | |
543 | } | |
544 | ||
e309769a | 545 | static void pim_bsm_update(struct pim_instance *pim, pim_addr bsr, |
5acde1cf | 546 | uint32_t bsr_prio) |
547 | { | |
11e1593f | 548 | if (pim_addr_cmp(bsr, pim->global_scope.current_bsr)) { |
5f010b12 | 549 | pim_nht_bsr_del(pim, pim->global_scope.current_bsr); |
4efdb9c6 | 550 | pim_nht_bsr_add(pim, bsr); |
5acde1cf | 551 | |
5acde1cf | 552 | pim->global_scope.current_bsr = bsr; |
553 | pim->global_scope.current_bsr_first_ts = | |
554 | pim_time_monotonic_sec(); | |
555 | pim->global_scope.state = ACCEPT_PREFERRED; | |
556 | } | |
557 | pim->global_scope.current_bsr_prio = bsr_prio; | |
558 | pim->global_scope.current_bsr_last_ts = pim_time_monotonic_sec(); | |
559 | } | |
560 | ||
b09bd804 DL |
561 | void pim_bsm_clear(struct pim_instance *pim) |
562 | { | |
563 | struct route_node *rn; | |
564 | struct route_node *rpnode; | |
565 | struct bsgrp_node *bsgrp; | |
b63192cf | 566 | pim_addr nht_p; |
b09bd804 DL |
567 | struct prefix g_all; |
568 | struct rp_info *rp_all; | |
569 | struct pim_upstream *up; | |
570 | struct rp_info *rp_info; | |
62596d9a | 571 | bool upstream_updated = false; |
b09bd804 | 572 | |
5f010b12 | 573 | pim_nht_bsr_del(pim, pim->global_scope.current_bsr); |
b09bd804 DL |
574 | |
575 | /* Reset scope zone data */ | |
576 | pim->global_scope.accept_nofwd_bsm = false; | |
577 | pim->global_scope.state = ACCEPT_ANY; | |
e309769a | 578 | pim->global_scope.current_bsr = PIMADDR_ANY; |
b09bd804 DL |
579 | pim->global_scope.current_bsr_prio = 0; |
580 | pim->global_scope.current_bsr_first_ts = 0; | |
581 | pim->global_scope.current_bsr_last_ts = 0; | |
582 | pim->global_scope.bsm_frag_tag = 0; | |
583 | pim_bsm_frags_free(&pim->global_scope); | |
584 | ||
585 | pim_bs_timer_stop(&pim->global_scope); | |
586 | ||
587 | for (rn = route_top(pim->global_scope.bsrp_table); rn; | |
588 | rn = route_next(rn)) { | |
589 | bsgrp = rn->info; | |
590 | if (!bsgrp) | |
591 | continue; | |
592 | ||
593 | rpnode = route_node_lookup(pim->rp_table, &bsgrp->group); | |
594 | ||
595 | if (!rpnode) { | |
596 | pim_free_bsgrp_node(bsgrp->scope->bsrp_table, | |
597 | &bsgrp->group); | |
598 | pim_free_bsgrp_data(bsgrp); | |
599 | continue; | |
600 | } | |
601 | ||
602 | rp_info = (struct rp_info *)rpnode->info; | |
603 | ||
604 | if ((!rp_info) || (rp_info->rp_src != RP_SRC_BSR)) { | |
605 | pim_free_bsgrp_node(bsgrp->scope->bsrp_table, | |
606 | &bsgrp->group); | |
607 | pim_free_bsgrp_data(bsgrp); | |
608 | continue; | |
609 | } | |
610 | ||
611 | /* Deregister addr with Zebra NHT */ | |
b63192cf | 612 | nht_p = rp_info->rp.rpf_addr; |
b09bd804 DL |
613 | |
614 | if (PIM_DEBUG_PIM_NHT_RP) { | |
b63192cf | 615 | zlog_debug("%s: Deregister RP addr %pPA with Zebra ", |
b09bd804 DL |
616 | __func__, &nht_p); |
617 | } | |
618 | ||
e6e53006 | 619 | pim_delete_tracked_nexthop(pim, nht_p, NULL, rp_info); |
b09bd804 | 620 | |
c6ced474 | 621 | if (!pim_get_all_mcast_group(&g_all)) |
b09bd804 DL |
622 | return; |
623 | ||
624 | rp_all = pim_rp_find_match_group(pim, &g_all); | |
625 | ||
626 | if (rp_all == rp_info) { | |
b63192cf | 627 | rp_all->rp.rpf_addr = PIMADDR_ANY; |
b09bd804 DL |
628 | rp_all->i_am_rp = 0; |
629 | } else { | |
630 | /* Delete the rp_info from rp-list */ | |
631 | listnode_delete(pim->rp_list, rp_info); | |
632 | ||
633 | /* Delete the rp node from rp_table */ | |
634 | rpnode->info = NULL; | |
635 | route_unlock_node(rpnode); | |
636 | route_unlock_node(rpnode); | |
637 | XFREE(MTYPE_PIM_RP, rp_info); | |
638 | } | |
639 | ||
640 | pim_free_bsgrp_node(bsgrp->scope->bsrp_table, &bsgrp->group); | |
641 | pim_free_bsgrp_data(bsgrp); | |
642 | } | |
643 | pim_rp_refresh_group_to_rp_mapping(pim); | |
644 | ||
645 | ||
646 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { | |
647 | /* Find the upstream (*, G) whose upstream address is same as | |
648 | * the RP | |
649 | */ | |
2a27f13b | 650 | if (!pim_addr_is_any(up->sg.src)) |
b09bd804 DL |
651 | continue; |
652 | ||
653 | struct prefix grp; | |
654 | struct rp_info *trp_info; | |
655 | ||
c631920c | 656 | pim_addr_to_prefix(&grp, up->sg.grp); |
b09bd804 DL |
657 | trp_info = pim_rp_find_match_group(pim, &grp); |
658 | ||
659 | /* RP not found for the group grp */ | |
cc144e8b | 660 | if (pim_rpf_addr_is_inaddr_any(&trp_info->rp)) { |
b09bd804 DL |
661 | pim_upstream_rpf_clear(pim, up); |
662 | pim_rp_set_upstream_addr(pim, &up->upstream_addr, | |
663 | up->sg.src, up->sg.grp); | |
664 | } else { | |
665 | /* RP found for the group grp */ | |
666 | pim_upstream_update(pim, up); | |
62596d9a | 667 | upstream_updated = true; |
b09bd804 DL |
668 | } |
669 | } | |
62596d9a MR |
670 | |
671 | if (upstream_updated) | |
672 | pim_zebra_update_all_interfaces(pim); | |
b09bd804 DL |
673 | } |
674 | ||
79d97386 | 675 | static bool pim_bsm_send_intf(uint8_t *buf, int len, struct interface *ifp, |
29fd9fca | 676 | pim_addr dst_addr) |
79d97386 | 677 | { |
678 | struct pim_interface *pim_ifp; | |
679 | ||
680 | pim_ifp = ifp->info; | |
681 | ||
682 | if (!pim_ifp) { | |
683 | if (PIM_DEBUG_BSM) | |
684 | zlog_debug("%s: Pim interface not available for %s", | |
15569c58 | 685 | __func__, ifp->name); |
79d97386 | 686 | return false; |
687 | } | |
688 | ||
689 | if (pim_ifp->pim_sock_fd == -1) { | |
690 | if (PIM_DEBUG_BSM) | |
691 | zlog_debug("%s: Pim sock not available for %s", | |
15569c58 | 692 | __func__, ifp->name); |
79d97386 | 693 | return false; |
694 | } | |
695 | ||
3bb29c4e | 696 | if (pim_msg_send(pim_ifp->pim_sock_fd, pim_ifp->primary_address, |
ac5c9346 | 697 | dst_addr, buf, len, ifp)) { |
3bb29c4e | 698 | zlog_warn("%s: Could not send BSM message on interface: %s", |
15569c58 | 699 | __func__, ifp->name); |
3bb29c4e DS |
700 | return false; |
701 | } | |
702 | ||
ac5c9346 | 703 | if (!pim_ifp->pim_passive_enable) |
704 | pim_ifp->pim_ifstat_bsm_tx++; | |
705 | ||
79d97386 | 706 | pim_ifp->pim->bsm_sent++; |
707 | return true; | |
708 | } | |
709 | ||
40270c35 | 710 | static bool pim_bsm_frag_send(uint8_t *buf, uint32_t len, struct interface *ifp, |
29fd9fca | 711 | uint32_t pim_mtu, pim_addr dst_addr, bool no_fwd) |
40270c35 | 712 | { |
145e4c38 | 713 | struct pim_interface *pim_ifp = ifp->info; |
40270c35 | 714 | struct bsmmsg_grpinfo *grpinfo, *curgrp; |
715 | uint8_t *firstgrp_ptr; | |
716 | uint8_t *pkt; | |
717 | uint8_t *pak_start; | |
718 | uint32_t parsed_len = 0; | |
719 | uint32_t this_pkt_rem; | |
720 | uint32_t copy_byte_count; | |
721 | uint32_t this_pkt_len; | |
722 | uint8_t total_rp_cnt; | |
723 | uint8_t this_rp_cnt; | |
724 | uint8_t frag_rp_cnt; | |
725 | uint8_t rp_fit_cnt; | |
726 | bool pak_pending = false; | |
727 | ||
728 | /* MTU passed here is PIM MTU (IP MTU less IP Hdr) */ | |
729 | if (pim_mtu < (PIM_MIN_BSM_LEN)) { | |
730 | zlog_warn( | |
f79f7a7b | 731 | "%s: mtu(pim mtu: %d) size less than minimum bootstrap len", |
15569c58 | 732 | __func__, pim_mtu); |
40270c35 | 733 | if (PIM_DEBUG_BSM) |
734 | zlog_debug( | |
f79f7a7b | 735 | "%s: mtu (pim mtu:%d) less than minimum bootstrap len", |
15569c58 | 736 | __func__, pim_mtu); |
40270c35 | 737 | return false; |
738 | } | |
739 | ||
740 | pak_start = XCALLOC(MTYPE_PIM_BSM_PKT_VAR_MEM, pim_mtu); | |
741 | ||
40270c35 | 742 | pkt = pak_start; |
743 | ||
744 | /* Fill PIM header later before sending packet to calc checksum */ | |
745 | pkt += PIM_MSG_HEADER_LEN; | |
746 | buf += PIM_MSG_HEADER_LEN; | |
747 | ||
748 | /* copy bsm header to new packet at offset of pim hdr */ | |
749 | memcpy(pkt, buf, PIM_BSM_HDR_LEN); | |
750 | pkt += PIM_BSM_HDR_LEN; | |
751 | buf += PIM_BSM_HDR_LEN; | |
752 | parsed_len += (PIM_MSG_HEADER_LEN + PIM_BSM_HDR_LEN); | |
753 | ||
754 | /* Store the position of first grp ptr, which can be reused for | |
755 | * next packet to start filling group. old bsm header and pim hdr | |
756 | * remains. So need not be filled again for next packet onwards. | |
757 | */ | |
758 | firstgrp_ptr = pkt; | |
759 | ||
760 | /* we received mtu excluding IP hdr len as param | |
761 | * now this_pkt_rem is mtu excluding | |
762 | * PIM_BSM_HDR_LEN + PIM_MSG_HEADER_LEN | |
763 | */ | |
764 | this_pkt_rem = pim_mtu - (PIM_BSM_HDR_LEN + PIM_MSG_HEADER_LEN); | |
765 | ||
766 | /* For each group till the packet length parsed */ | |
767 | while (parsed_len < len) { | |
768 | /* pkt ---> fragment's current pointer | |
769 | * buf ---> input buffer's current pointer | |
770 | * mtu ---> size of the pim packet - PIM header | |
771 | * curgrp ---> current group on the fragment | |
772 | * grpinfo ---> current group on the input buffer | |
773 | * this_pkt_rem ---> bytes remaing on the current fragment | |
774 | * rp_fit_cnt ---> num of rp for current grp that | |
775 | * fits this frag | |
776 | * total_rp_cnt ---> total rp present for the group in the buf | |
777 | * frag_rp_cnt ---> no of rp for the group to be fit in | |
778 | * the frag | |
779 | * this_rp_cnt ---> how many rp have we parsed | |
780 | */ | |
781 | grpinfo = (struct bsmmsg_grpinfo *)buf; | |
782 | memcpy(pkt, buf, PIM_BSM_GRP_LEN); | |
783 | curgrp = (struct bsmmsg_grpinfo *)pkt; | |
784 | parsed_len += PIM_BSM_GRP_LEN; | |
785 | pkt += PIM_BSM_GRP_LEN; | |
786 | buf += PIM_BSM_GRP_LEN; | |
787 | this_pkt_rem -= PIM_BSM_GRP_LEN; | |
788 | ||
789 | /* initialize rp count and total_rp_cnt before the rp loop */ | |
790 | this_rp_cnt = 0; | |
791 | total_rp_cnt = grpinfo->frag_rp_count; | |
792 | ||
793 | /* Loop till all RPs for the group parsed */ | |
794 | while (this_rp_cnt < total_rp_cnt) { | |
795 | /* All RP from a group processed here. | |
796 | * group is pointed by grpinfo. | |
797 | * At this point make sure buf pointing to a RP | |
798 | * within a group | |
799 | */ | |
800 | rp_fit_cnt = this_pkt_rem / PIM_BSM_RP_LEN; | |
801 | ||
802 | /* calculate how many rp am i going to copy in | |
803 | * this frag | |
804 | */ | |
805 | if (rp_fit_cnt > (total_rp_cnt - this_rp_cnt)) | |
806 | frag_rp_cnt = total_rp_cnt - this_rp_cnt; | |
807 | else | |
808 | frag_rp_cnt = rp_fit_cnt; | |
809 | ||
810 | /* populate the frag rp count for the current grp */ | |
811 | curgrp->frag_rp_count = frag_rp_cnt; | |
812 | copy_byte_count = frag_rp_cnt * PIM_BSM_RP_LEN; | |
813 | ||
814 | /* copy all the rp that we are fitting in this | |
815 | * frag for the grp | |
816 | */ | |
817 | memcpy(pkt, buf, copy_byte_count); | |
818 | this_rp_cnt += frag_rp_cnt; | |
819 | buf += copy_byte_count; | |
820 | pkt += copy_byte_count; | |
821 | parsed_len += copy_byte_count; | |
822 | this_pkt_rem -= copy_byte_count; | |
823 | ||
824 | /* Either we couldn't fit all rp for the group or the | |
825 | * mtu reached | |
826 | */ | |
827 | if ((this_rp_cnt < total_rp_cnt) | |
828 | || (this_pkt_rem | |
829 | < (PIM_BSM_GRP_LEN + PIM_BSM_RP_LEN))) { | |
830 | /* No space to fit in more rp, send this pkt */ | |
831 | this_pkt_len = pim_mtu - this_pkt_rem; | |
145e4c38 DL |
832 | pim_msg_build_header( |
833 | pim_ifp->primary_address, dst_addr, | |
834 | pak_start, this_pkt_len, | |
835 | PIM_MSG_TYPE_BOOTSTRAP, no_fwd); | |
40270c35 | 836 | pim_bsm_send_intf(pak_start, this_pkt_len, ifp, |
837 | dst_addr); | |
838 | ||
839 | /* Construct next fragment. Reuse old packet */ | |
840 | pkt = firstgrp_ptr; | |
841 | this_pkt_rem = pim_mtu - (PIM_BSM_HDR_LEN | |
842 | + PIM_MSG_HEADER_LEN); | |
843 | ||
f5267398 DS |
844 | /* If pkt can't accommodate next group + at |
845 | * least one rp, we must break out of this inner | |
846 | * loop and process next RP | |
40270c35 | 847 | */ |
848 | if (total_rp_cnt == this_rp_cnt) | |
849 | break; | |
850 | ||
851 | /* If some more RPs for the same group pending, | |
852 | * fill grp hdr | |
853 | */ | |
854 | memcpy(pkt, (uint8_t *)grpinfo, | |
855 | PIM_BSM_GRP_LEN); | |
856 | curgrp = (struct bsmmsg_grpinfo *)pkt; | |
857 | pkt += PIM_BSM_GRP_LEN; | |
858 | this_pkt_rem -= PIM_BSM_GRP_LEN; | |
859 | pak_pending = false; | |
860 | } else { | |
861 | /* We filled something but not yet sent out */ | |
862 | pak_pending = true; | |
863 | } | |
864 | } /* while RP count */ | |
865 | } /*while parsed len */ | |
866 | ||
867 | /* Send if we have any unsent packet */ | |
868 | if (pak_pending) { | |
869 | this_pkt_len = pim_mtu - this_pkt_rem; | |
145e4c38 DL |
870 | pim_msg_build_header(pim_ifp->primary_address, dst_addr, |
871 | pak_start, this_pkt_len, | |
40270c35 | 872 | PIM_MSG_TYPE_BOOTSTRAP, no_fwd); |
873 | pim_bsm_send_intf(pak_start, (pim_mtu - this_pkt_rem), ifp, | |
874 | dst_addr); | |
875 | } | |
876 | XFREE(MTYPE_PIM_BSM_PKT_VAR_MEM, pak_start); | |
877 | return true; | |
878 | } | |
879 | ||
79d97386 | 880 | static void pim_bsm_fwd_whole_sz(struct pim_instance *pim, uint8_t *buf, |
881 | uint32_t len, int sz) | |
882 | { | |
883 | struct interface *ifp; | |
884 | struct pim_interface *pim_ifp; | |
29fd9fca | 885 | pim_addr dst_addr; |
79d97386 | 886 | uint32_t pim_mtu; |
2951a7a4 QY |
887 | bool no_fwd = false; |
888 | bool ret = false; | |
79d97386 | 889 | |
890 | /* For now only global scope zone is supported, so send on all | |
891 | * pim interfaces in the vrf | |
892 | */ | |
893 | dst_addr = qpim_all_pim_routers_addr; | |
894 | FOR_ALL_INTERFACES (pim->vrf, ifp) { | |
895 | pim_ifp = ifp->info; | |
896 | if ((!pim_ifp) || (!pim_ifp->bsm_enable)) | |
897 | continue; | |
9255f21e | 898 | |
899 | /* | |
900 | * RFC 5059 Sec 3.4: | |
901 | * When a Bootstrap message is forwarded, it is forwarded out | |
902 | * of every multicast-capable interface that has PIM neighbors. | |
903 | * | |
904 | * So skipping pim interfaces with no neighbors. | |
905 | */ | |
906 | if (listcount(pim_ifp->pim_neighbor_list) == 0) | |
907 | continue; | |
908 | ||
79d97386 | 909 | pim_hello_require(ifp); |
910 | pim_mtu = ifp->mtu - MAX_IP_HDR_LEN; | |
911 | if (pim_mtu < len) { | |
40270c35 | 912 | ret = pim_bsm_frag_send(buf, len, ifp, pim_mtu, |
913 | dst_addr, no_fwd); | |
914 | if (PIM_DEBUG_BSM) | |
915 | zlog_debug("%s: pim_bsm_frag_send returned %s", | |
15569c58 | 916 | __func__, ret ? "TRUE" : "FALSE"); |
79d97386 | 917 | } else { |
145e4c38 DL |
918 | pim_msg_build_header(pim_ifp->primary_address, dst_addr, |
919 | buf, len, PIM_MSG_TYPE_BOOTSTRAP, | |
79d97386 | 920 | no_fwd); |
921 | if (!pim_bsm_send_intf(buf, len, ifp, dst_addr)) { | |
922 | if (PIM_DEBUG_BSM) | |
923 | zlog_debug( | |
2951a7a4 | 924 | "%s: pim_bsm_send_intf returned false", |
15569c58 | 925 | __func__); |
79d97386 | 926 | } |
927 | } | |
928 | } | |
929 | } | |
930 | ||
6bb2ef35 | 931 | bool pim_bsm_new_nbr_fwd(struct pim_neighbor *neigh, struct interface *ifp) |
932 | { | |
29fd9fca | 933 | pim_addr dst_addr; |
6bb2ef35 | 934 | struct pim_interface *pim_ifp; |
935 | struct bsm_scope *scope; | |
d4a4525c | 936 | struct bsm_frag *bsfrag; |
6bb2ef35 | 937 | uint32_t pim_mtu; |
938 | bool no_fwd = true; | |
939 | bool ret = false; | |
940 | ||
9bb93fa0 DL |
941 | if (PIM_DEBUG_BSM) |
942 | zlog_debug("%s: New neighbor %pPA seen on %s", __func__, | |
943 | &neigh->source_addr, ifp->name); | |
6bb2ef35 | 944 | |
945 | pim_ifp = ifp->info; | |
946 | ||
947 | /* DR only forwards BSM packet */ | |
034db86b | 948 | if (!pim_addr_cmp(pim_ifp->pim_dr_addr, pim_ifp->primary_address)) { |
6bb2ef35 | 949 | if (PIM_DEBUG_BSM) |
950 | zlog_debug( | |
951 | "%s: It is not DR, so don't forward BSM packet", | |
5e81f5dd | 952 | __func__); |
6bb2ef35 | 953 | } |
954 | ||
955 | if (!pim_ifp->bsm_enable) { | |
956 | if (PIM_DEBUG_BSM) | |
5e81f5dd DS |
957 | zlog_debug("%s: BSM proc not enabled on %s", __func__, |
958 | ifp->name); | |
6bb2ef35 | 959 | return ret; |
960 | } | |
961 | ||
962 | scope = &pim_ifp->pim->global_scope; | |
963 | ||
d4a4525c | 964 | if (!bsm_frags_count(scope->bsm_frags)) { |
6bb2ef35 | 965 | if (PIM_DEBUG_BSM) |
966 | zlog_debug("%s: BSM list for the scope is empty", | |
5e81f5dd | 967 | __func__); |
6bb2ef35 | 968 | return ret; |
969 | } | |
970 | ||
971 | if (!pim_ifp->ucast_bsm_accept) { | |
972 | dst_addr = qpim_all_pim_routers_addr; | |
973 | if (PIM_DEBUG_BSM) | |
cefd2343 | 974 | zlog_debug("%s: Sending BSM mcast to %pPA", __func__, |
975 | &neigh->source_addr); | |
6bb2ef35 | 976 | } else { |
977 | dst_addr = neigh->source_addr; | |
978 | if (PIM_DEBUG_BSM) | |
cefd2343 | 979 | zlog_debug("%s: Sending BSM ucast to %pPA", __func__, |
980 | &neigh->source_addr); | |
6bb2ef35 | 981 | } |
982 | pim_mtu = ifp->mtu - MAX_IP_HDR_LEN; | |
983 | pim_hello_require(ifp); | |
984 | ||
d4a4525c DL |
985 | frr_each (bsm_frags, scope->bsm_frags, bsfrag) { |
986 | if (pim_mtu < bsfrag->size) { | |
987 | ret = pim_bsm_frag_send(bsfrag->data, bsfrag->size, ifp, | |
988 | pim_mtu, dst_addr, no_fwd); | |
6bb2ef35 | 989 | if (!ret) { |
990 | if (PIM_DEBUG_BSM) | |
991 | zlog_debug( | |
992 | "%s: pim_bsm_frag_send failed", | |
5e81f5dd | 993 | __func__); |
6bb2ef35 | 994 | } |
995 | } else { | |
996 | /* Pim header needs to be constructed */ | |
145e4c38 DL |
997 | pim_msg_build_header(pim_ifp->primary_address, dst_addr, |
998 | bsfrag->data, bsfrag->size, | |
6bb2ef35 | 999 | PIM_MSG_TYPE_BOOTSTRAP, no_fwd); |
d4a4525c DL |
1000 | ret = pim_bsm_send_intf(bsfrag->data, bsfrag->size, ifp, |
1001 | dst_addr); | |
6bb2ef35 | 1002 | if (!ret) { |
1003 | if (PIM_DEBUG_BSM) | |
1004 | zlog_debug( | |
1005 | "%s: pim_bsm_frag_send failed", | |
5e81f5dd | 1006 | __func__); |
6bb2ef35 | 1007 | } |
1008 | } | |
1009 | } | |
1010 | return ret; | |
1011 | } | |
1012 | ||
d0e418b4 | 1013 | struct bsgrp_node *pim_bsm_get_bsgrp_node(struct bsm_scope *scope, |
1014 | struct prefix *grp) | |
1015 | { | |
1016 | struct route_node *rn; | |
1017 | struct bsgrp_node *bsgrp; | |
1018 | ||
1019 | rn = route_node_lookup(scope->bsrp_table, grp); | |
1020 | if (!rn) { | |
1021 | if (PIM_DEBUG_BSM) | |
1022 | zlog_debug("%s: Route node doesn't exist for the group", | |
15569c58 | 1023 | __func__); |
d0e418b4 | 1024 | return NULL; |
1025 | } | |
1026 | bsgrp = rn->info; | |
1027 | route_unlock_node(rn); | |
1028 | ||
1029 | return bsgrp; | |
1030 | } | |
5acde1cf | 1031 | |
c0590b1c | 1032 | static uint32_t hash_calc_on_grp_rp(struct prefix group, pim_addr rp, |
7b3e6ba1 | 1033 | uint8_t hashmasklen) |
1034 | { | |
1035 | uint64_t temp; | |
1036 | uint32_t hash; | |
1037 | uint32_t grpaddr; | |
1038 | uint32_t rp_add; | |
1039 | uint32_t mask = 0xffffffff; | |
1040 | ||
1041 | /* mask to be made zero if hashmasklen is 0 because mask << 32 | |
1042 | * may not give 0. hashmasklen can be 0 to 32. | |
1043 | */ | |
1044 | if (hashmasklen == 0) | |
1045 | mask = 0; | |
1046 | ||
1047 | /* in_addr stores ip in big endian, hence network byte order | |
1048 | * convert to uint32 before processing hash | |
1049 | */ | |
c0590b1c | 1050 | #if PIM_IPV == 4 |
7b3e6ba1 | 1051 | grpaddr = ntohl(group.u.prefix4.s_addr); |
c0590b1c | 1052 | #else |
1053 | grpaddr = group.u.prefix6.s6_addr32[0] ^ group.u.prefix6.s6_addr32[1] ^ | |
1054 | group.u.prefix6.s6_addr32[2] ^ group.u.prefix6.s6_addr32[3]; | |
1055 | #endif | |
7b3e6ba1 | 1056 | /* Avoid shifting by 32 bit on a 32 bit register */ |
1057 | if (hashmasklen) | |
1058 | grpaddr = grpaddr & ((mask << (32 - hashmasklen))); | |
1059 | else | |
1060 | grpaddr = grpaddr & mask; | |
1407e40f | 1061 | |
c0590b1c | 1062 | #if PIM_IPV == 4 |
7b3e6ba1 | 1063 | rp_add = ntohl(rp.s_addr); |
c0590b1c | 1064 | #else |
1065 | rp_add = rp.s6_addr32[0] ^ rp.s6_addr32[1] ^ rp.s6_addr32[2] ^ | |
1066 | rp.s6_addr32[3]; | |
1067 | #endif | |
29f7fc87 DS |
1068 | temp = 1103515245 * ((1103515245 * (uint64_t)grpaddr + 12345) ^ rp_add) |
1069 | + 12345; | |
7b3e6ba1 | 1070 | hash = temp & (0x7fffffff); |
1071 | return hash; | |
1072 | } | |
1073 | ||
1074 | static bool pim_install_bsm_grp_rp(struct pim_instance *pim, | |
1075 | struct bsgrp_node *grpnode, | |
1076 | struct bsmmsg_rpinfo *rp) | |
1077 | { | |
1078 | struct bsm_rpinfo *bsm_rpinfo; | |
1079 | uint8_t hashMask_len = pim->global_scope.hashMasklen; | |
1080 | ||
1081 | /*memory allocation for bsm_rpinfo */ | |
fdab2940 | 1082 | bsm_rpinfo = XCALLOC(MTYPE_PIM_BSRP_INFO, sizeof(*bsm_rpinfo)); |
7b3e6ba1 | 1083 | |
7b3e6ba1 | 1084 | bsm_rpinfo->rp_prio = rp->rp_pri; |
1085 | bsm_rpinfo->rp_holdtime = rp->rp_holdtime; | |
1407e40f | 1086 | bsm_rpinfo->rp_address = rp->rpaddr.addr; |
7b3e6ba1 | 1087 | bsm_rpinfo->elapse_time = 0; |
1088 | ||
1089 | /* Back pointer to the group node. */ | |
1090 | bsm_rpinfo->bsgrp_node = grpnode; | |
1091 | ||
1092 | /* update hash for this rp node */ | |
1093 | bsm_rpinfo->hash = hash_calc_on_grp_rp(grpnode->group, rp->rpaddr.addr, | |
1094 | hashMask_len); | |
fdab2940 | 1095 | if (bsm_rpinfos_add(grpnode->partial_bsrp_list, bsm_rpinfo) == NULL) { |
7b3e6ba1 | 1096 | if (PIM_DEBUG_BSM) |
1097 | zlog_debug( | |
63efca0e | 1098 | "%s, bs_rpinfo node added to the partial bs_rplist.", |
15569c58 | 1099 | __func__); |
7b3e6ba1 | 1100 | return true; |
1101 | } | |
1102 | ||
1103 | if (PIM_DEBUG_BSM) | |
63efca0e | 1104 | zlog_debug("%s: list node not added", __func__); |
7b3e6ba1 | 1105 | |
fdab2940 | 1106 | XFREE(MTYPE_PIM_BSRP_INFO, bsm_rpinfo); |
7b3e6ba1 | 1107 | return false; |
1108 | } | |
1109 | ||
1110 | static void pim_update_pending_rp_cnt(struct bsm_scope *sz, | |
1111 | struct bsgrp_node *bsgrp, | |
1112 | uint16_t bsm_frag_tag, | |
1113 | uint32_t total_rp_count) | |
1114 | { | |
1115 | if (bsgrp->pend_rp_cnt) { | |
1116 | /* received bsm is different packet , | |
1117 | * it is not same fragment. | |
1118 | */ | |
1119 | if (bsm_frag_tag != bsgrp->frag_tag) { | |
1120 | if (PIM_DEBUG_BSM) | |
1121 | zlog_debug( | |
63efca0e | 1122 | "%s,Received a new BSM ,so clear the pending bs_rpinfo list.", |
15569c58 | 1123 | __func__); |
fdab2940 | 1124 | pim_bsm_rpinfos_free(bsgrp->partial_bsrp_list); |
7b3e6ba1 | 1125 | bsgrp->pend_rp_cnt = total_rp_count; |
1126 | } | |
1127 | } else | |
1128 | bsgrp->pend_rp_cnt = total_rp_count; | |
1129 | ||
1130 | bsgrp->frag_tag = bsm_frag_tag; | |
1131 | } | |
1132 | ||
1133 | /* Parsing BSR packet and adding to partial list of corresponding bsgrp node */ | |
1134 | static bool pim_bsm_parse_install_g2rp(struct bsm_scope *scope, uint8_t *buf, | |
1135 | int buflen, uint16_t bsm_frag_tag) | |
1136 | { | |
1137 | struct bsmmsg_grpinfo grpinfo; | |
1138 | struct bsmmsg_rpinfo rpinfo; | |
1139 | struct prefix group; | |
1140 | struct bsgrp_node *bsgrp = NULL; | |
1141 | int frag_rp_cnt = 0; | |
1142 | int offset = 0; | |
1143 | int ins_count = 0; | |
81a688bc | 1144 | pim_addr grp_addr; |
7b3e6ba1 | 1145 | |
1146 | while (buflen > offset) { | |
b1945363 DS |
1147 | if (offset + (int)sizeof(struct bsmmsg_grpinfo) > buflen) { |
1148 | if (PIM_DEBUG_BSM) | |
1149 | zlog_debug( | |
1150 | "%s: buflen received %d is less than the internal data structure of the packet would suggest", | |
15569c58 | 1151 | __func__, buflen); |
b1945363 DS |
1152 | return false; |
1153 | } | |
7b3e6ba1 | 1154 | /* Extract Group tlv from BSM */ |
1155 | memcpy(&grpinfo, buf, sizeof(struct bsmmsg_grpinfo)); | |
81a688bc | 1156 | grp_addr = grpinfo.group.addr; |
7b3e6ba1 | 1157 | |
81a688bc | 1158 | if (PIM_DEBUG_BSM) |
7b3e6ba1 | 1159 | zlog_debug( |
81a688bc | 1160 | "%s, Group %pPAs Rpcount:%d Fragment-Rp-count:%d", |
1161 | __func__, &grp_addr, grpinfo.rp_count, | |
7b3e6ba1 | 1162 | grpinfo.frag_rp_count); |
7b3e6ba1 | 1163 | |
1164 | buf += sizeof(struct bsmmsg_grpinfo); | |
1165 | offset += sizeof(struct bsmmsg_grpinfo); | |
1166 | ||
81a688bc | 1167 | group.family = PIM_AF; |
1168 | if (grpinfo.group.mask > PIM_MAX_BITLEN) { | |
b1945363 | 1169 | if (PIM_DEBUG_BSM) |
15569c58 | 1170 | zlog_debug( |
81a688bc | 1171 | "%s, prefix length specified: %d is too long", |
15569c58 | 1172 | __func__, grpinfo.group.mask); |
b1945363 DS |
1173 | return false; |
1174 | } | |
81a688bc | 1175 | |
1176 | pim_addr_to_prefix(&group, grp_addr); | |
7b3e6ba1 | 1177 | group.prefixlen = grpinfo.group.mask; |
7b3e6ba1 | 1178 | |
1179 | /* Get the Group node for the BSM rp table */ | |
1180 | bsgrp = pim_bsm_get_bsgrp_node(scope, &group); | |
1181 | ||
43038bd5 DL |
1182 | if (grpinfo.rp_count == 0) { |
1183 | struct bsm_rpinfo *old_rpinfo; | |
1184 | ||
1185 | /* BSR explicitly no longer has RPs for this group */ | |
1186 | if (!bsgrp) | |
1187 | continue; | |
1188 | ||
81a688bc | 1189 | if (PIM_DEBUG_BSM) |
1190 | zlog_debug( | |
1191 | "%s, Rp count is zero for group: %pPAs", | |
1192 | __func__, &grp_addr); | |
43038bd5 DL |
1193 | |
1194 | old_rpinfo = bsm_rpinfos_first(bsgrp->bsrp_list); | |
1195 | if (old_rpinfo) | |
1196 | pim_rp_del(scope->pim, old_rpinfo->rp_address, | |
1197 | group, NULL, RP_SRC_BSR); | |
1198 | ||
1199 | pim_free_bsgrp_node(scope->bsrp_table, &bsgrp->group); | |
1200 | pim_free_bsgrp_data(bsgrp); | |
1201 | continue; | |
1202 | } | |
1203 | ||
7b3e6ba1 | 1204 | if (!bsgrp) { |
1205 | if (PIM_DEBUG_BSM) | |
63efca0e DL |
1206 | zlog_debug("%s, Create new BSM Group node.", |
1207 | __func__); | |
7b3e6ba1 | 1208 | |
1209 | /* create a new node to be added to the tree. */ | |
1210 | bsgrp = pim_bsm_new_bsgrp_node(scope->bsrp_table, | |
1211 | &group); | |
1212 | ||
1213 | if (!bsgrp) { | |
1214 | zlog_debug( | |
63efca0e | 1215 | "%s, Failed to get the BSM group node.", |
15569c58 | 1216 | __func__); |
7b3e6ba1 | 1217 | continue; |
1218 | } | |
1219 | ||
1220 | bsgrp->scope = scope; | |
1221 | } | |
1222 | ||
1223 | pim_update_pending_rp_cnt(scope, bsgrp, bsm_frag_tag, | |
1224 | grpinfo.rp_count); | |
1225 | frag_rp_cnt = grpinfo.frag_rp_count; | |
1226 | ins_count = 0; | |
1227 | ||
1228 | while (frag_rp_cnt--) { | |
b1945363 DS |
1229 | if (offset + (int)sizeof(struct bsmmsg_rpinfo) |
1230 | > buflen) { | |
1231 | if (PIM_DEBUG_BSM) | |
1232 | zlog_debug( | |
1233 | "%s, buflen received: %u is less than the internal data structure of the packet would suggest", | |
15569c58 | 1234 | __func__, buflen); |
b1945363 DS |
1235 | return false; |
1236 | } | |
1237 | ||
7b3e6ba1 | 1238 | /* Extract RP address tlv from BSM */ |
1239 | memcpy(&rpinfo, buf, sizeof(struct bsmmsg_rpinfo)); | |
1240 | rpinfo.rp_holdtime = ntohs(rpinfo.rp_holdtime); | |
1241 | buf += sizeof(struct bsmmsg_rpinfo); | |
1242 | offset += sizeof(struct bsmmsg_rpinfo); | |
1243 | ||
1244 | if (PIM_DEBUG_BSM) { | |
1407e40f | 1245 | pim_addr rp_addr; |
7b3e6ba1 | 1246 | |
1407e40f | 1247 | rp_addr = rpinfo.rpaddr.addr; |
7b3e6ba1 | 1248 | zlog_debug( |
1407e40f | 1249 | "%s, Rp address - %pPAs; pri:%d hold:%d", |
1250 | __func__, &rp_addr, rpinfo.rp_pri, | |
15569c58 | 1251 | rpinfo.rp_holdtime); |
7b3e6ba1 | 1252 | } |
1253 | ||
1254 | /* Call Install api to update grp-rp mappings */ | |
1255 | if (pim_install_bsm_grp_rp(scope->pim, bsgrp, &rpinfo)) | |
1256 | ins_count++; | |
1257 | } | |
1258 | ||
1259 | bsgrp->pend_rp_cnt -= ins_count; | |
1260 | ||
1261 | if (!bsgrp->pend_rp_cnt) { | |
1262 | if (PIM_DEBUG_BSM) | |
1263 | zlog_debug( | |
1264 | "%s, Recvd all the rps for this group, so bsrp list with penidng rp list.", | |
15569c58 | 1265 | __func__); |
20fd30e5 | 1266 | /* replace the bsrp_list with pending list */ |
1267 | pim_instate_pend_list(bsgrp); | |
7b3e6ba1 | 1268 | } |
1269 | } | |
1270 | return true; | |
1271 | } | |
1272 | ||
76bfa030 | 1273 | int pim_bsm_process(struct interface *ifp, pim_sgaddr *sg, uint8_t *buf, |
5acde1cf | 1274 | uint32_t buf_size, bool no_fwd) |
1275 | { | |
1276 | struct bsm_hdr *bshdr; | |
79d97386 | 1277 | int sz = PIM_GBL_SZ_ID; |
5acde1cf | 1278 | struct bsmmsg_grpinfo *msg_grp; |
1279 | struct pim_interface *pim_ifp = NULL; | |
d4a4525c | 1280 | struct bsm_frag *bsfrag; |
5acde1cf | 1281 | struct pim_instance *pim; |
5acde1cf | 1282 | uint16_t frag_tag; |
cefb7247 | 1283 | pim_addr bsr_addr; |
2951a7a4 | 1284 | bool empty_bsm = false; |
5acde1cf | 1285 | |
1286 | /* BSM Packet acceptance validation */ | |
1287 | pim_ifp = ifp->info; | |
1288 | if (!pim_ifp) { | |
1289 | if (PIM_DEBUG_BSM) | |
1290 | zlog_debug("%s: multicast not enabled on interface %s", | |
15569c58 | 1291 | __func__, ifp->name); |
5acde1cf | 1292 | return -1; |
1293 | } | |
1294 | ||
fd3eb43d | 1295 | if (pim_ifp->pim_passive_enable) { |
1296 | if (PIM_DEBUG_PIM_PACKETS) | |
1297 | zlog_debug( | |
1298 | "skip receiving PIM message on passive interface %s", | |
1299 | ifp->name); | |
1300 | return 0; | |
1301 | } | |
1302 | ||
5acde1cf | 1303 | pim_ifp->pim_ifstat_bsm_rx++; |
1304 | pim = pim_ifp->pim; | |
1305 | pim->bsm_rcvd++; | |
1306 | ||
1307 | /* Drop if bsm processing is disabled on interface */ | |
1308 | if (!pim_ifp->bsm_enable) { | |
15569c58 DA |
1309 | zlog_warn("%s: BSM not enabled on interface %s", __func__, |
1310 | ifp->name); | |
5acde1cf | 1311 | pim_ifp->pim_ifstat_bsm_cfg_miss++; |
1312 | pim->bsm_dropped++; | |
1313 | return -1; | |
1314 | } | |
1315 | ||
d83a854b | 1316 | if (buf_size < (PIM_MSG_HEADER_LEN + sizeof(struct bsm_hdr))) { |
b1945363 | 1317 | if (PIM_DEBUG_BSM) |
15569c58 DA |
1318 | zlog_debug( |
1319 | "%s: received buffer length of %d which is too small to properly decode", | |
1320 | __func__, buf_size); | |
b1945363 DS |
1321 | return -1; |
1322 | } | |
1323 | ||
5acde1cf | 1324 | bshdr = (struct bsm_hdr *)(buf + PIM_MSG_HEADER_LEN); |
1ae87bdd | 1325 | if (bshdr->hm_len > PIM_MAX_BITLEN) { |
1326 | zlog_warn( | |
1327 | "Bad hashmask length for %s; got %hhu, expected value in range 0-32", | |
1328 | PIM_AF_NAME, bshdr->hm_len); | |
817f8933 QY |
1329 | pim->bsm_dropped++; |
1330 | return -1; | |
1331 | } | |
5acde1cf | 1332 | pim->global_scope.hashMasklen = bshdr->hm_len; |
1333 | frag_tag = ntohs(bshdr->frag_tag); | |
cefb7247 DL |
1334 | /* NB: bshdr->bsr_addr.addr is packed/unaligned => memcpy */ |
1335 | memcpy(&bsr_addr, &bshdr->bsr_addr.addr, sizeof(bsr_addr)); | |
5acde1cf | 1336 | |
1337 | /* Identify empty BSM */ | |
1338 | if ((buf_size - PIM_BSM_HDR_LEN - PIM_MSG_HEADER_LEN) < PIM_BSM_GRP_LEN) | |
1339 | empty_bsm = true; | |
1340 | ||
1341 | if (!empty_bsm) { | |
1342 | msg_grp = (struct bsmmsg_grpinfo *)(buf + PIM_MSG_HEADER_LEN | |
1343 | + PIM_BSM_HDR_LEN); | |
1344 | /* Currently we don't support scope zoned BSM */ | |
1345 | if (msg_grp->group.sz) { | |
1346 | if (PIM_DEBUG_BSM) | |
1347 | zlog_debug( | |
1348 | "%s : Administratively scoped range BSM received", | |
15569c58 | 1349 | __func__); |
5acde1cf | 1350 | pim_ifp->pim_ifstat_bsm_invalid_sz++; |
1351 | pim->bsm_dropped++; | |
1352 | return -1; | |
1353 | } | |
1354 | } | |
1355 | ||
1356 | /* Drop if bsr is not preferred bsr */ | |
cefb7247 | 1357 | if (!is_preferred_bsr(pim, bsr_addr, bshdr->bsr_prio)) { |
5acde1cf | 1358 | if (PIM_DEBUG_BSM) |
1359 | zlog_debug("%s : Received a non-preferred BSM", | |
15569c58 | 1360 | __func__); |
5acde1cf | 1361 | pim->bsm_dropped++; |
1362 | return -1; | |
1363 | } | |
1364 | ||
1365 | if (no_fwd) { | |
1366 | /* only accept no-forward BSM if quick refresh on startup */ | |
1367 | if ((pim->global_scope.accept_nofwd_bsm) | |
1368 | || (frag_tag == pim->global_scope.bsm_frag_tag)) { | |
1369 | pim->global_scope.accept_nofwd_bsm = false; | |
1370 | } else { | |
1371 | if (PIM_DEBUG_BSM) | |
1372 | zlog_debug( | |
1ae87bdd | 1373 | "%s : nofwd_bsm received on %pPAs when accpt_nofwd_bsm false", |
cefb7247 | 1374 | __func__, &bsr_addr); |
5acde1cf | 1375 | pim->bsm_dropped++; |
1376 | pim_ifp->pim_ifstat_ucast_bsm_cfg_miss++; | |
1377 | return -1; | |
1378 | } | |
1379 | } | |
1380 | ||
f0e91749 | 1381 | if (!pim_addr_cmp(sg->grp, qpim_all_pim_routers_addr)) { |
4efdb9c6 DL |
1382 | /* Multicast BSMs are only accepted if source interface & IP |
1383 | * match RPF towards the BSR's IP address, or they have | |
1384 | * no-forward set | |
1385 | */ | |
cefb7247 DL |
1386 | if (!no_fwd && |
1387 | !pim_nht_bsr_rpf_check(pim, bsr_addr, ifp, sg->src)) { | |
4efdb9c6 DL |
1388 | if (PIM_DEBUG_BSM) |
1389 | zlog_debug( | |
1ae87bdd | 1390 | "BSM check: RPF to BSR %pPAs is not %pPA%%%s", |
cefb7247 | 1391 | &bsr_addr, &sg->src, ifp->name); |
4efdb9c6 DL |
1392 | pim->bsm_dropped++; |
1393 | return -1; | |
5acde1cf | 1394 | } |
76bfa030 | 1395 | } else if (if_address_is_local(&sg->grp, PIM_AF, pim->vrf->vrf_id)) { |
5acde1cf | 1396 | /* Unicast BSM received - if ucast bsm not enabled on |
1397 | * the interface, drop it | |
1398 | */ | |
1399 | if (!pim_ifp->ucast_bsm_accept) { | |
1400 | if (PIM_DEBUG_BSM) | |
1401 | zlog_debug( | |
1402 | "%s : Unicast BSM not enabled on interface %s", | |
15569c58 | 1403 | __func__, ifp->name); |
5acde1cf | 1404 | pim_ifp->pim_ifstat_ucast_bsm_cfg_miss++; |
1405 | pim->bsm_dropped++; | |
1406 | return -1; | |
1407 | } | |
1408 | ||
1409 | } else { | |
1410 | if (PIM_DEBUG_BSM) | |
1411 | zlog_debug("%s : Invalid destination address", | |
15569c58 | 1412 | __func__); |
5acde1cf | 1413 | pim->bsm_dropped++; |
1414 | return -1; | |
1415 | } | |
1416 | ||
1417 | if (empty_bsm) { | |
1418 | if (PIM_DEBUG_BSM) | |
15569c58 | 1419 | zlog_debug("%s : Empty Pref BSM received", __func__); |
5acde1cf | 1420 | } |
7b3e6ba1 | 1421 | /* Parse Update bsm rp table and install/uninstall rp if required */ |
1422 | if (!pim_bsm_parse_install_g2rp( | |
1423 | &pim_ifp->pim->global_scope, | |
1424 | (buf + PIM_BSM_HDR_LEN + PIM_MSG_HEADER_LEN), | |
1425 | (buf_size - PIM_BSM_HDR_LEN - PIM_MSG_HEADER_LEN), | |
1426 | frag_tag)) { | |
1427 | if (PIM_DEBUG_BSM) { | |
63efca0e | 1428 | zlog_debug("%s, Parsing BSM failed.", __func__); |
7b3e6ba1 | 1429 | } |
1430 | pim->bsm_dropped++; | |
1431 | return -1; | |
1432 | } | |
5acde1cf | 1433 | /* Restart the bootstrap timer */ |
1434 | pim_bs_timer_restart(&pim_ifp->pim->global_scope, | |
1435 | PIM_BSR_DEFAULT_TIMEOUT); | |
1436 | ||
1437 | /* If new BSM received, clear the old bsm database */ | |
1438 | if (pim_ifp->pim->global_scope.bsm_frag_tag != frag_tag) { | |
1439 | if (PIM_DEBUG_BSM) { | |
1440 | zlog_debug("%s: Current frag tag: %d Frag teg rcvd: %d", | |
15569c58 | 1441 | __func__, |
5acde1cf | 1442 | pim_ifp->pim->global_scope.bsm_frag_tag, |
1443 | frag_tag); | |
1444 | } | |
d4a4525c | 1445 | pim_bsm_frags_free(&pim_ifp->pim->global_scope); |
5acde1cf | 1446 | pim_ifp->pim->global_scope.bsm_frag_tag = frag_tag; |
1447 | } | |
1448 | ||
1449 | /* update the scope information from bsm */ | |
cefb7247 | 1450 | pim_bsm_update(pim, bsr_addr, bshdr->bsr_prio); |
79d97386 | 1451 | |
1452 | if (!no_fwd) { | |
1453 | pim_bsm_fwd_whole_sz(pim_ifp->pim, buf, buf_size, sz); | |
d4a4525c DL |
1454 | bsfrag = XCALLOC(MTYPE_PIM_BSM_FRAG, |
1455 | sizeof(struct bsm_frag) + buf_size); | |
79d97386 | 1456 | |
d4a4525c DL |
1457 | bsfrag->size = buf_size; |
1458 | memcpy(bsfrag->data, buf, buf_size); | |
1459 | bsm_frags_add_tail(pim_ifp->pim->global_scope.bsm_frags, | |
1460 | bsfrag); | |
79d97386 | 1461 | } |
1462 | ||
5acde1cf | 1463 | return 0; |
1464 | } |