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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; | |
133 | if (node1->rp_address.s_addr < node2->rp_address.s_addr) | |
134 | return 1; | |
135 | if (node1->rp_address.s_addr > node2->rp_address.s_addr) | |
136 | return -1; | |
137 | return 0; | |
138 | } | |
139 | ||
7b3e6ba1 | 140 | static struct bsgrp_node *pim_bsm_new_bsgrp_node(struct route_table *rt, |
141 | struct prefix *grp) | |
142 | { | |
143 | struct route_node *rn; | |
144 | struct bsgrp_node *bsgrp; | |
145 | ||
146 | rn = route_node_get(rt, grp); | |
147 | if (!rn) { | |
15569c58 | 148 | zlog_warn("%s: route node creation failed", __func__); |
7b3e6ba1 | 149 | return NULL; |
150 | } | |
151 | bsgrp = XCALLOC(MTYPE_PIM_BSGRP_NODE, sizeof(struct bsgrp_node)); | |
152 | ||
7b3e6ba1 | 153 | rn->info = bsgrp; |
fdab2940 DL |
154 | bsm_rpinfos_init(bsgrp->bsrp_list); |
155 | bsm_rpinfos_init(bsgrp->partial_bsrp_list); | |
7b3e6ba1 | 156 | |
157 | prefix_copy(&bsgrp->group, grp); | |
158 | return bsgrp; | |
159 | } | |
160 | ||
cc9f21da | 161 | static void pim_on_bs_timer(struct thread *t) |
23255dfd | 162 | { |
c843f56d | 163 | struct route_node *rn; |
164 | struct bsm_scope *scope; | |
165 | struct bsgrp_node *bsgrp_node; | |
166 | struct bsm_rpinfo *bsrp; | |
c843f56d | 167 | |
168 | scope = THREAD_ARG(t); | |
169 | THREAD_OFF(scope->bs_timer); | |
170 | ||
171 | if (PIM_DEBUG_BSM) | |
172 | zlog_debug("%s: Bootstrap Timer expired for scope: %d", | |
15569c58 | 173 | __func__, scope->sz_id); |
c843f56d | 174 | |
5f010b12 | 175 | pim_nht_bsr_del(scope->pim, scope->current_bsr); |
c843f56d | 176 | |
177 | /* Reset scope zone data */ | |
178 | scope->accept_nofwd_bsm = false; | |
179 | scope->state = ACCEPT_ANY; | |
180 | scope->current_bsr.s_addr = INADDR_ANY; | |
181 | scope->current_bsr_prio = 0; | |
182 | scope->current_bsr_first_ts = 0; | |
183 | scope->current_bsr_last_ts = 0; | |
184 | scope->bsm_frag_tag = 0; | |
d4a4525c | 185 | pim_bsm_frags_free(scope); |
c843f56d | 186 | |
187 | for (rn = route_top(scope->bsrp_table); rn; rn = route_next(rn)) { | |
188 | ||
189 | bsgrp_node = (struct bsgrp_node *)rn->info; | |
190 | if (!bsgrp_node) { | |
191 | if (PIM_DEBUG_BSM) | |
15569c58 | 192 | zlog_debug("%s: bsgrp_node is null", __func__); |
c843f56d | 193 | continue; |
194 | } | |
195 | /* Give grace time for rp to continue for another hold time */ | |
fdab2940 DL |
196 | bsrp = bsm_rpinfos_first(bsgrp_node->bsrp_list); |
197 | if (bsrp) | |
c843f56d | 198 | pim_g2rp_timer_restart(bsrp, bsrp->rp_holdtime); |
fdab2940 | 199 | |
c843f56d | 200 | /* clear pending list */ |
fdab2940 DL |
201 | pim_bsm_rpinfos_free(bsgrp_node->partial_bsrp_list); |
202 | bsgrp_node->pend_rp_cnt = 0; | |
c843f56d | 203 | } |
23255dfd | 204 | } |
205 | ||
b09bd804 | 206 | static void pim_bs_timer_stop(struct bsm_scope *scope) |
23255dfd | 207 | { |
208 | if (PIM_DEBUG_BSM) | |
15569c58 DA |
209 | zlog_debug("%s : BS timer being stopped of sz: %d", __func__, |
210 | scope->sz_id); | |
23255dfd | 211 | THREAD_OFF(scope->bs_timer); |
212 | } | |
213 | ||
214 | static void pim_bs_timer_start(struct bsm_scope *scope, int bs_timeout) | |
215 | { | |
216 | if (!scope) { | |
217 | if (PIM_DEBUG_BSM) | |
15569c58 | 218 | zlog_debug("%s : Invalid scope(NULL).", __func__); |
23255dfd | 219 | return; |
220 | } | |
221 | THREAD_OFF(scope->bs_timer); | |
222 | if (PIM_DEBUG_BSM) | |
15569c58 DA |
223 | zlog_debug( |
224 | "%s : starting bs timer for scope %d with timeout %d secs", | |
225 | __func__, scope->sz_id, bs_timeout); | |
23255dfd | 226 | thread_add_timer(router->master, pim_on_bs_timer, scope, bs_timeout, |
227 | &scope->bs_timer); | |
228 | } | |
229 | ||
5acde1cf | 230 | static inline void pim_bs_timer_restart(struct bsm_scope *scope, int bs_timeout) |
231 | { | |
232 | pim_bs_timer_start(scope, bs_timeout); | |
233 | } | |
234 | ||
361b5843 | 235 | void pim_bsm_proc_init(struct pim_instance *pim) |
236 | { | |
237 | memset(&pim->global_scope, 0, sizeof(struct bsm_scope)); | |
238 | ||
239 | pim->global_scope.sz_id = PIM_GBL_SZ_ID; | |
240 | pim->global_scope.bsrp_table = route_table_init(); | |
241 | pim->global_scope.accept_nofwd_bsm = true; | |
242 | pim->global_scope.state = NO_INFO; | |
243 | pim->global_scope.pim = pim; | |
d4a4525c | 244 | bsm_frags_init(pim->global_scope.bsm_frags); |
361b5843 | 245 | pim_bs_timer_start(&pim->global_scope, PIM_BS_TIME); |
246 | } | |
247 | ||
248 | void pim_bsm_proc_free(struct pim_instance *pim) | |
249 | { | |
250 | struct route_node *rn; | |
251 | struct bsgrp_node *bsgrp; | |
252 | ||
253 | pim_bs_timer_stop(&pim->global_scope); | |
d4a4525c | 254 | pim_bsm_frags_free(&pim->global_scope); |
361b5843 | 255 | |
d0e418b4 | 256 | for (rn = route_top(pim->global_scope.bsrp_table); rn; |
257 | rn = route_next(rn)) { | |
361b5843 | 258 | bsgrp = rn->info; |
259 | if (!bsgrp) | |
260 | continue; | |
261 | pim_free_bsgrp_data(bsgrp); | |
262 | } | |
263 | ||
4d19a911 | 264 | route_table_finish(pim->global_scope.bsrp_table); |
361b5843 | 265 | } |
266 | ||
c295e391 | 267 | static bool is_hold_time_elapsed(void *data) |
268 | { | |
269 | struct bsm_rpinfo *bsrp; | |
270 | ||
271 | bsrp = data; | |
272 | ||
273 | if (bsrp->elapse_time < bsrp->rp_holdtime) | |
274 | return false; | |
275 | else | |
276 | return true; | |
277 | } | |
278 | ||
cc9f21da | 279 | static void pim_on_g2rp_timer(struct thread *t) |
a5164e97 | 280 | { |
c295e391 | 281 | struct bsm_rpinfo *bsrp; |
282 | struct bsm_rpinfo *bsrp_node; | |
283 | struct bsgrp_node *bsgrp_node; | |
c295e391 | 284 | struct pim_instance *pim; |
285 | struct rp_info *rp_info; | |
286 | struct route_node *rn; | |
287 | uint16_t elapse; | |
9dca52b9 | 288 | pim_addr bsrp_addr; |
c295e391 | 289 | |
290 | bsrp = THREAD_ARG(t); | |
291 | THREAD_OFF(bsrp->g2rp_timer); | |
292 | bsgrp_node = bsrp->bsgrp_node; | |
293 | ||
294 | /* elapse time is the hold time of expired node */ | |
295 | elapse = bsrp->rp_holdtime; | |
296 | bsrp_addr = bsrp->rp_address; | |
297 | ||
298 | /* update elapse for all bsrp nodes */ | |
fdab2940 | 299 | frr_each_safe (bsm_rpinfos, bsgrp_node->bsrp_list, bsrp_node) { |
c295e391 | 300 | bsrp_node->elapse_time += elapse; |
301 | ||
fdab2940 DL |
302 | if (is_hold_time_elapsed(bsrp_node)) { |
303 | bsm_rpinfos_del(bsgrp_node->bsrp_list, bsrp_node); | |
304 | pim_bsm_rpinfo_free(bsrp_node); | |
305 | } | |
306 | } | |
c295e391 | 307 | |
308 | /* Get the next elected rp node */ | |
fdab2940 | 309 | bsrp = bsm_rpinfos_first(bsgrp_node->bsrp_list); |
c295e391 | 310 | pim = bsgrp_node->scope->pim; |
311 | rn = route_node_lookup(pim->rp_table, &bsgrp_node->group); | |
312 | ||
313 | if (!rn) { | |
5e81f5dd | 314 | zlog_warn("%s: Route node doesn't exist", __func__); |
cc9f21da | 315 | return; |
c295e391 | 316 | } |
317 | ||
318 | rp_info = (struct rp_info *)rn->info; | |
319 | ||
320 | if (!rp_info) { | |
321 | route_unlock_node(rn); | |
cc9f21da | 322 | return; |
c295e391 | 323 | } |
324 | ||
325 | if (rp_info->rp_src != RP_SRC_STATIC) { | |
326 | /* If new rp available, change it else delete the existing */ | |
327 | if (bsrp) { | |
c295e391 | 328 | pim_g2rp_timer_start( |
329 | bsrp, (bsrp->rp_holdtime - bsrp->elapse_time)); | |
49b7b2c4 | 330 | pim_rp_change(pim, bsrp->rp_address, bsgrp_node->group, |
c295e391 | 331 | RP_SRC_BSR); |
332 | } else { | |
333 | pim_rp_del(pim, bsrp_addr, bsgrp_node->group, NULL, | |
334 | RP_SRC_BSR); | |
335 | } | |
336 | } | |
337 | ||
fdab2940 DL |
338 | if (!bsm_rpinfos_count(bsgrp_node->bsrp_list) |
339 | && !bsm_rpinfos_count(bsgrp_node->partial_bsrp_list)) { | |
c295e391 | 340 | pim_free_bsgrp_node(pim->global_scope.bsrp_table, |
341 | &bsgrp_node->group); | |
342 | pim_free_bsgrp_data(bsgrp_node); | |
343 | } | |
a5164e97 | 344 | } |
345 | ||
346 | static void pim_g2rp_timer_start(struct bsm_rpinfo *bsrp, int hold_time) | |
347 | { | |
348 | if (!bsrp) { | |
349 | if (PIM_DEBUG_BSM) | |
15569c58 | 350 | zlog_debug("%s : Invalid brsp(NULL).", __func__); |
a5164e97 | 351 | return; |
352 | } | |
353 | THREAD_OFF(bsrp->g2rp_timer); | |
2dbe669b | 354 | if (PIM_DEBUG_BSM) |
a5164e97 | 355 | zlog_debug( |
ee2bbf7c | 356 | "%s : starting g2rp timer for grp: %pFX - rp: %pI4 with timeout %d secs(Actual Hold time : %d secs)", |
2dbe669b | 357 | __func__, &bsrp->bsgrp_node->group, |
ee2bbf7c | 358 | &bsrp->rp_address, hold_time, |
a5164e97 | 359 | bsrp->rp_holdtime); |
a5164e97 | 360 | |
361 | thread_add_timer(router->master, pim_on_g2rp_timer, bsrp, hold_time, | |
362 | &bsrp->g2rp_timer); | |
363 | } | |
364 | ||
365 | static inline void pim_g2rp_timer_restart(struct bsm_rpinfo *bsrp, | |
366 | int hold_time) | |
367 | { | |
368 | pim_g2rp_timer_start(bsrp, hold_time); | |
369 | } | |
370 | ||
20fd30e5 | 371 | static void pim_g2rp_timer_stop(struct bsm_rpinfo *bsrp) |
372 | { | |
373 | if (!bsrp) | |
374 | return; | |
375 | ||
2dbe669b | 376 | if (PIM_DEBUG_BSM) |
ee2bbf7c | 377 | zlog_debug("%s : stopping g2rp timer for grp: %pFX - rp: %pI4", |
2dbe669b | 378 | __func__, &bsrp->bsgrp_node->group, |
ee2bbf7c | 379 | &bsrp->rp_address); |
20fd30e5 | 380 | |
381 | THREAD_OFF(bsrp->g2rp_timer); | |
382 | } | |
383 | ||
384 | static bool is_hold_time_zero(void *data) | |
385 | { | |
386 | struct bsm_rpinfo *bsrp; | |
387 | ||
388 | bsrp = data; | |
389 | ||
390 | if (bsrp->rp_holdtime) | |
391 | return false; | |
392 | else | |
393 | return true; | |
394 | } | |
395 | ||
396 | static void pim_instate_pend_list(struct bsgrp_node *bsgrp_node) | |
397 | { | |
398 | struct bsm_rpinfo *active; | |
399 | struct bsm_rpinfo *pend; | |
20fd30e5 | 400 | struct rp_info *rp_info; |
401 | struct route_node *rn; | |
402 | struct pim_instance *pim; | |
403 | struct rp_info *rp_all; | |
404 | struct prefix group_all; | |
405 | bool had_rp_node = true; | |
406 | ||
407 | pim = bsgrp_node->scope->pim; | |
fdab2940 | 408 | active = bsm_rpinfos_first(bsgrp_node->bsrp_list); |
20fd30e5 | 409 | |
410 | /* Remove nodes with hold time 0 & check if list still has a head */ | |
5f1808ac DS |
411 | frr_each_safe (bsm_rpinfos, bsgrp_node->partial_bsrp_list, pend) { |
412 | if (is_hold_time_zero(pend)) { | |
fdab2940 | 413 | bsm_rpinfos_del(bsgrp_node->partial_bsrp_list, pend); |
5f1808ac DS |
414 | pim_bsm_rpinfo_free(pend); |
415 | } | |
416 | } | |
fdab2940 DL |
417 | |
418 | pend = bsm_rpinfos_first(bsgrp_node->partial_bsrp_list); | |
20fd30e5 | 419 | |
c6ced474 | 420 | if (!pim_get_all_mcast_group(&group_all)) |
20fd30e5 | 421 | return; |
422 | ||
423 | rp_all = pim_rp_find_match_group(pim, &group_all); | |
424 | rn = route_node_lookup(pim->rp_table, &bsgrp_node->group); | |
425 | ||
426 | if (pend) | |
427 | pim_g2rp_timer_start(pend, pend->rp_holdtime); | |
428 | ||
429 | /* if rp node doesn't exist or exist but not configured(rp_all), | |
430 | * install the rp from head(if exists) of partial list. List is | |
431 | * is sorted such that head is the elected RP for the group. | |
432 | */ | |
cc144e8b | 433 | if (!rn || (prefix_same(&rp_all->group, &bsgrp_node->group) && |
434 | pim_rpf_addr_is_inaddr_any(&rp_all->rp))) { | |
20fd30e5 | 435 | if (PIM_DEBUG_BSM) |
15569c58 | 436 | zlog_debug("%s: Route node doesn't exist", __func__); |
20fd30e5 | 437 | if (pend) |
438 | pim_rp_new(pim, pend->rp_address, bsgrp_node->group, | |
439 | NULL, RP_SRC_BSR); | |
440 | had_rp_node = false; | |
441 | } else { | |
442 | rp_info = (struct rp_info *)rn->info; | |
443 | if (!rp_info) { | |
444 | route_unlock_node(rn); | |
445 | if (pend) | |
446 | pim_rp_new(pim, pend->rp_address, | |
447 | bsgrp_node->group, NULL, RP_SRC_BSR); | |
448 | had_rp_node = false; | |
449 | } | |
450 | } | |
451 | ||
452 | /* We didn't have rp node and pending list is empty(unlikely), cleanup*/ | |
453 | if ((!had_rp_node) && (!pend)) { | |
454 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, | |
455 | &bsgrp_node->group); | |
456 | pim_free_bsgrp_data(bsgrp_node); | |
457 | return; | |
458 | } | |
459 | ||
460 | if ((had_rp_node) && (rp_info->rp_src != RP_SRC_STATIC)) { | |
461 | /* This means we searched and got rp node, needs unlock */ | |
462 | route_unlock_node(rn); | |
463 | ||
464 | if (active && pend) { | |
465 | if ((active->rp_address.s_addr | |
466 | != pend->rp_address.s_addr)) | |
467 | pim_rp_change(pim, pend->rp_address, | |
468 | bsgrp_node->group, RP_SRC_BSR); | |
469 | } | |
470 | ||
471 | /* Possible when the first BSM has group with 0 rp count */ | |
472 | if ((!active) && (!pend)) { | |
473 | if (PIM_DEBUG_BSM) { | |
474 | zlog_debug( | |
475 | "%s: Both bsrp and partial list are empty", | |
15569c58 | 476 | __func__); |
20fd30e5 | 477 | } |
478 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, | |
479 | &bsgrp_node->group); | |
480 | pim_free_bsgrp_data(bsgrp_node); | |
481 | return; | |
482 | } | |
483 | ||
484 | /* Possible when a group with 0 rp count received in BSM */ | |
485 | if ((active) && (!pend)) { | |
486 | pim_rp_del(pim, active->rp_address, bsgrp_node->group, | |
487 | NULL, RP_SRC_BSR); | |
488 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, | |
489 | &bsgrp_node->group); | |
490 | if (PIM_DEBUG_BSM) { | |
491 | zlog_debug("%s:Pend List is null,del grp node", | |
15569c58 | 492 | __func__); |
20fd30e5 | 493 | } |
494 | pim_free_bsgrp_data(bsgrp_node); | |
495 | return; | |
496 | } | |
497 | } | |
498 | ||
499 | if ((had_rp_node) && (rp_info->rp_src == RP_SRC_STATIC)) { | |
500 | /* We need to unlock rn this case */ | |
501 | route_unlock_node(rn); | |
502 | /* there is a chance that static rp exist and bsrp cleaned | |
503 | * so clean bsgrp node if pending list empty | |
504 | */ | |
505 | if (!pend) { | |
506 | if (PIM_DEBUG_BSM) | |
507 | zlog_debug( | |
508 | "%s: Partial list is empty, static rp exists", | |
15569c58 | 509 | __func__); |
20fd30e5 | 510 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, |
511 | &bsgrp_node->group); | |
512 | pim_free_bsgrp_data(bsgrp_node); | |
513 | return; | |
514 | } | |
515 | } | |
516 | ||
517 | /* swap the list & delete all nodes in partial list (old bsrp_list) | |
518 | * before swap | |
519 | * active is head of bsrp list | |
520 | * pend is head of partial list | |
521 | * After swap | |
522 | * active is head of partial list | |
523 | * pend is head of bsrp list | |
524 | * So check appriate head after swap and clean the new partial list | |
525 | */ | |
fdab2940 DL |
526 | bsm_rpinfos_swap_all(bsgrp_node->bsrp_list, |
527 | bsgrp_node->partial_bsrp_list); | |
20fd30e5 | 528 | |
fdab2940 | 529 | if (active) |
20fd30e5 | 530 | pim_g2rp_timer_stop(active); |
fdab2940 | 531 | pim_bsm_rpinfos_free(bsgrp_node->partial_bsrp_list); |
20fd30e5 | 532 | } |
533 | ||
5acde1cf | 534 | static bool is_preferred_bsr(struct pim_instance *pim, struct in_addr bsr, |
535 | uint32_t bsr_prio) | |
536 | { | |
537 | if (bsr.s_addr == pim->global_scope.current_bsr.s_addr) | |
538 | return true; | |
539 | ||
540 | if (bsr_prio > pim->global_scope.current_bsr_prio) | |
541 | return true; | |
542 | ||
543 | else if (bsr_prio == pim->global_scope.current_bsr_prio) { | |
e34c4619 | 544 | if (ntohl(bsr.s_addr) |
545 | >= ntohl(pim->global_scope.current_bsr.s_addr)) | |
5acde1cf | 546 | return true; |
547 | else | |
548 | return false; | |
549 | } else | |
550 | return false; | |
551 | } | |
552 | ||
553 | static void pim_bsm_update(struct pim_instance *pim, struct in_addr bsr, | |
554 | uint32_t bsr_prio) | |
555 | { | |
5acde1cf | 556 | if (bsr.s_addr != pim->global_scope.current_bsr.s_addr) { |
5f010b12 | 557 | pim_nht_bsr_del(pim, pim->global_scope.current_bsr); |
4efdb9c6 | 558 | pim_nht_bsr_add(pim, bsr); |
5acde1cf | 559 | |
5acde1cf | 560 | pim->global_scope.current_bsr = bsr; |
561 | pim->global_scope.current_bsr_first_ts = | |
562 | pim_time_monotonic_sec(); | |
563 | pim->global_scope.state = ACCEPT_PREFERRED; | |
564 | } | |
565 | pim->global_scope.current_bsr_prio = bsr_prio; | |
566 | pim->global_scope.current_bsr_last_ts = pim_time_monotonic_sec(); | |
567 | } | |
568 | ||
b09bd804 DL |
569 | void pim_bsm_clear(struct pim_instance *pim) |
570 | { | |
571 | struct route_node *rn; | |
572 | struct route_node *rpnode; | |
573 | struct bsgrp_node *bsgrp; | |
574 | struct prefix nht_p; | |
575 | struct prefix g_all; | |
576 | struct rp_info *rp_all; | |
577 | struct pim_upstream *up; | |
578 | struct rp_info *rp_info; | |
62596d9a | 579 | bool upstream_updated = false; |
b09bd804 | 580 | |
5f010b12 | 581 | pim_nht_bsr_del(pim, pim->global_scope.current_bsr); |
b09bd804 DL |
582 | |
583 | /* Reset scope zone data */ | |
584 | pim->global_scope.accept_nofwd_bsm = false; | |
585 | pim->global_scope.state = ACCEPT_ANY; | |
586 | pim->global_scope.current_bsr.s_addr = INADDR_ANY; | |
587 | pim->global_scope.current_bsr_prio = 0; | |
588 | pim->global_scope.current_bsr_first_ts = 0; | |
589 | pim->global_scope.current_bsr_last_ts = 0; | |
590 | pim->global_scope.bsm_frag_tag = 0; | |
591 | pim_bsm_frags_free(&pim->global_scope); | |
592 | ||
593 | pim_bs_timer_stop(&pim->global_scope); | |
594 | ||
595 | for (rn = route_top(pim->global_scope.bsrp_table); rn; | |
596 | rn = route_next(rn)) { | |
597 | bsgrp = rn->info; | |
598 | if (!bsgrp) | |
599 | continue; | |
600 | ||
601 | rpnode = route_node_lookup(pim->rp_table, &bsgrp->group); | |
602 | ||
603 | if (!rpnode) { | |
604 | pim_free_bsgrp_node(bsgrp->scope->bsrp_table, | |
605 | &bsgrp->group); | |
606 | pim_free_bsgrp_data(bsgrp); | |
607 | continue; | |
608 | } | |
609 | ||
610 | rp_info = (struct rp_info *)rpnode->info; | |
611 | ||
612 | if ((!rp_info) || (rp_info->rp_src != RP_SRC_BSR)) { | |
613 | pim_free_bsgrp_node(bsgrp->scope->bsrp_table, | |
614 | &bsgrp->group); | |
615 | pim_free_bsgrp_data(bsgrp); | |
616 | continue; | |
617 | } | |
618 | ||
619 | /* Deregister addr with Zebra NHT */ | |
620 | nht_p.family = AF_INET; | |
621 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
622 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
623 | ||
624 | if (PIM_DEBUG_PIM_NHT_RP) { | |
625 | zlog_debug("%s: Deregister RP addr %pFX with Zebra ", | |
626 | __func__, &nht_p); | |
627 | } | |
628 | ||
629 | pim_delete_tracked_nexthop(pim, &nht_p, NULL, rp_info); | |
630 | ||
c6ced474 | 631 | if (!pim_get_all_mcast_group(&g_all)) |
b09bd804 DL |
632 | return; |
633 | ||
634 | rp_all = pim_rp_find_match_group(pim, &g_all); | |
635 | ||
636 | if (rp_all == rp_info) { | |
cc144e8b | 637 | pim_addr_to_prefix(&rp_all->rp.rpf_addr, PIMADDR_ANY); |
b09bd804 DL |
638 | rp_all->i_am_rp = 0; |
639 | } else { | |
640 | /* Delete the rp_info from rp-list */ | |
641 | listnode_delete(pim->rp_list, rp_info); | |
642 | ||
643 | /* Delete the rp node from rp_table */ | |
644 | rpnode->info = NULL; | |
645 | route_unlock_node(rpnode); | |
646 | route_unlock_node(rpnode); | |
647 | XFREE(MTYPE_PIM_RP, rp_info); | |
648 | } | |
649 | ||
650 | pim_free_bsgrp_node(bsgrp->scope->bsrp_table, &bsgrp->group); | |
651 | pim_free_bsgrp_data(bsgrp); | |
652 | } | |
653 | pim_rp_refresh_group_to_rp_mapping(pim); | |
654 | ||
655 | ||
656 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { | |
657 | /* Find the upstream (*, G) whose upstream address is same as | |
658 | * the RP | |
659 | */ | |
2a27f13b | 660 | if (!pim_addr_is_any(up->sg.src)) |
b09bd804 DL |
661 | continue; |
662 | ||
663 | struct prefix grp; | |
664 | struct rp_info *trp_info; | |
665 | ||
c631920c | 666 | pim_addr_to_prefix(&grp, up->sg.grp); |
b09bd804 DL |
667 | trp_info = pim_rp_find_match_group(pim, &grp); |
668 | ||
669 | /* RP not found for the group grp */ | |
cc144e8b | 670 | if (pim_rpf_addr_is_inaddr_any(&trp_info->rp)) { |
b09bd804 DL |
671 | pim_upstream_rpf_clear(pim, up); |
672 | pim_rp_set_upstream_addr(pim, &up->upstream_addr, | |
673 | up->sg.src, up->sg.grp); | |
674 | } else { | |
675 | /* RP found for the group grp */ | |
676 | pim_upstream_update(pim, up); | |
62596d9a | 677 | upstream_updated = true; |
b09bd804 DL |
678 | } |
679 | } | |
62596d9a MR |
680 | |
681 | if (upstream_updated) | |
682 | pim_zebra_update_all_interfaces(pim); | |
b09bd804 DL |
683 | } |
684 | ||
79d97386 | 685 | static bool pim_bsm_send_intf(uint8_t *buf, int len, struct interface *ifp, |
29fd9fca | 686 | pim_addr dst_addr) |
79d97386 | 687 | { |
688 | struct pim_interface *pim_ifp; | |
689 | ||
690 | pim_ifp = ifp->info; | |
691 | ||
692 | if (!pim_ifp) { | |
693 | if (PIM_DEBUG_BSM) | |
694 | zlog_debug("%s: Pim interface not available for %s", | |
15569c58 | 695 | __func__, ifp->name); |
79d97386 | 696 | return false; |
697 | } | |
698 | ||
699 | if (pim_ifp->pim_sock_fd == -1) { | |
700 | if (PIM_DEBUG_BSM) | |
701 | zlog_debug("%s: Pim sock not available for %s", | |
15569c58 | 702 | __func__, ifp->name); |
79d97386 | 703 | return false; |
704 | } | |
705 | ||
3bb29c4e | 706 | if (pim_msg_send(pim_ifp->pim_sock_fd, pim_ifp->primary_address, |
ac5c9346 | 707 | dst_addr, buf, len, ifp)) { |
3bb29c4e | 708 | zlog_warn("%s: Could not send BSM message on interface: %s", |
15569c58 | 709 | __func__, ifp->name); |
3bb29c4e DS |
710 | return false; |
711 | } | |
712 | ||
ac5c9346 | 713 | if (!pim_ifp->pim_passive_enable) |
714 | pim_ifp->pim_ifstat_bsm_tx++; | |
715 | ||
79d97386 | 716 | pim_ifp->pim->bsm_sent++; |
717 | return true; | |
718 | } | |
719 | ||
40270c35 | 720 | static bool pim_bsm_frag_send(uint8_t *buf, uint32_t len, struct interface *ifp, |
29fd9fca | 721 | uint32_t pim_mtu, pim_addr dst_addr, bool no_fwd) |
40270c35 | 722 | { |
145e4c38 | 723 | struct pim_interface *pim_ifp = ifp->info; |
40270c35 | 724 | struct bsmmsg_grpinfo *grpinfo, *curgrp; |
725 | uint8_t *firstgrp_ptr; | |
726 | uint8_t *pkt; | |
727 | uint8_t *pak_start; | |
728 | uint32_t parsed_len = 0; | |
729 | uint32_t this_pkt_rem; | |
730 | uint32_t copy_byte_count; | |
731 | uint32_t this_pkt_len; | |
732 | uint8_t total_rp_cnt; | |
733 | uint8_t this_rp_cnt; | |
734 | uint8_t frag_rp_cnt; | |
735 | uint8_t rp_fit_cnt; | |
736 | bool pak_pending = false; | |
737 | ||
738 | /* MTU passed here is PIM MTU (IP MTU less IP Hdr) */ | |
739 | if (pim_mtu < (PIM_MIN_BSM_LEN)) { | |
740 | zlog_warn( | |
f79f7a7b | 741 | "%s: mtu(pim mtu: %d) size less than minimum bootstrap len", |
15569c58 | 742 | __func__, pim_mtu); |
40270c35 | 743 | if (PIM_DEBUG_BSM) |
744 | zlog_debug( | |
f79f7a7b | 745 | "%s: mtu (pim mtu:%d) less than minimum bootstrap len", |
15569c58 | 746 | __func__, pim_mtu); |
40270c35 | 747 | return false; |
748 | } | |
749 | ||
750 | pak_start = XCALLOC(MTYPE_PIM_BSM_PKT_VAR_MEM, pim_mtu); | |
751 | ||
40270c35 | 752 | pkt = pak_start; |
753 | ||
754 | /* Fill PIM header later before sending packet to calc checksum */ | |
755 | pkt += PIM_MSG_HEADER_LEN; | |
756 | buf += PIM_MSG_HEADER_LEN; | |
757 | ||
758 | /* copy bsm header to new packet at offset of pim hdr */ | |
759 | memcpy(pkt, buf, PIM_BSM_HDR_LEN); | |
760 | pkt += PIM_BSM_HDR_LEN; | |
761 | buf += PIM_BSM_HDR_LEN; | |
762 | parsed_len += (PIM_MSG_HEADER_LEN + PIM_BSM_HDR_LEN); | |
763 | ||
764 | /* Store the position of first grp ptr, which can be reused for | |
765 | * next packet to start filling group. old bsm header and pim hdr | |
766 | * remains. So need not be filled again for next packet onwards. | |
767 | */ | |
768 | firstgrp_ptr = pkt; | |
769 | ||
770 | /* we received mtu excluding IP hdr len as param | |
771 | * now this_pkt_rem is mtu excluding | |
772 | * PIM_BSM_HDR_LEN + PIM_MSG_HEADER_LEN | |
773 | */ | |
774 | this_pkt_rem = pim_mtu - (PIM_BSM_HDR_LEN + PIM_MSG_HEADER_LEN); | |
775 | ||
776 | /* For each group till the packet length parsed */ | |
777 | while (parsed_len < len) { | |
778 | /* pkt ---> fragment's current pointer | |
779 | * buf ---> input buffer's current pointer | |
780 | * mtu ---> size of the pim packet - PIM header | |
781 | * curgrp ---> current group on the fragment | |
782 | * grpinfo ---> current group on the input buffer | |
783 | * this_pkt_rem ---> bytes remaing on the current fragment | |
784 | * rp_fit_cnt ---> num of rp for current grp that | |
785 | * fits this frag | |
786 | * total_rp_cnt ---> total rp present for the group in the buf | |
787 | * frag_rp_cnt ---> no of rp for the group to be fit in | |
788 | * the frag | |
789 | * this_rp_cnt ---> how many rp have we parsed | |
790 | */ | |
791 | grpinfo = (struct bsmmsg_grpinfo *)buf; | |
792 | memcpy(pkt, buf, PIM_BSM_GRP_LEN); | |
793 | curgrp = (struct bsmmsg_grpinfo *)pkt; | |
794 | parsed_len += PIM_BSM_GRP_LEN; | |
795 | pkt += PIM_BSM_GRP_LEN; | |
796 | buf += PIM_BSM_GRP_LEN; | |
797 | this_pkt_rem -= PIM_BSM_GRP_LEN; | |
798 | ||
799 | /* initialize rp count and total_rp_cnt before the rp loop */ | |
800 | this_rp_cnt = 0; | |
801 | total_rp_cnt = grpinfo->frag_rp_count; | |
802 | ||
803 | /* Loop till all RPs for the group parsed */ | |
804 | while (this_rp_cnt < total_rp_cnt) { | |
805 | /* All RP from a group processed here. | |
806 | * group is pointed by grpinfo. | |
807 | * At this point make sure buf pointing to a RP | |
808 | * within a group | |
809 | */ | |
810 | rp_fit_cnt = this_pkt_rem / PIM_BSM_RP_LEN; | |
811 | ||
812 | /* calculate how many rp am i going to copy in | |
813 | * this frag | |
814 | */ | |
815 | if (rp_fit_cnt > (total_rp_cnt - this_rp_cnt)) | |
816 | frag_rp_cnt = total_rp_cnt - this_rp_cnt; | |
817 | else | |
818 | frag_rp_cnt = rp_fit_cnt; | |
819 | ||
820 | /* populate the frag rp count for the current grp */ | |
821 | curgrp->frag_rp_count = frag_rp_cnt; | |
822 | copy_byte_count = frag_rp_cnt * PIM_BSM_RP_LEN; | |
823 | ||
824 | /* copy all the rp that we are fitting in this | |
825 | * frag for the grp | |
826 | */ | |
827 | memcpy(pkt, buf, copy_byte_count); | |
828 | this_rp_cnt += frag_rp_cnt; | |
829 | buf += copy_byte_count; | |
830 | pkt += copy_byte_count; | |
831 | parsed_len += copy_byte_count; | |
832 | this_pkt_rem -= copy_byte_count; | |
833 | ||
834 | /* Either we couldn't fit all rp for the group or the | |
835 | * mtu reached | |
836 | */ | |
837 | if ((this_rp_cnt < total_rp_cnt) | |
838 | || (this_pkt_rem | |
839 | < (PIM_BSM_GRP_LEN + PIM_BSM_RP_LEN))) { | |
840 | /* No space to fit in more rp, send this pkt */ | |
841 | this_pkt_len = pim_mtu - this_pkt_rem; | |
145e4c38 DL |
842 | pim_msg_build_header( |
843 | pim_ifp->primary_address, dst_addr, | |
844 | pak_start, this_pkt_len, | |
845 | PIM_MSG_TYPE_BOOTSTRAP, no_fwd); | |
40270c35 | 846 | pim_bsm_send_intf(pak_start, this_pkt_len, ifp, |
847 | dst_addr); | |
848 | ||
849 | /* Construct next fragment. Reuse old packet */ | |
850 | pkt = firstgrp_ptr; | |
851 | this_pkt_rem = pim_mtu - (PIM_BSM_HDR_LEN | |
852 | + PIM_MSG_HEADER_LEN); | |
853 | ||
f5267398 DS |
854 | /* If pkt can't accommodate next group + at |
855 | * least one rp, we must break out of this inner | |
856 | * loop and process next RP | |
40270c35 | 857 | */ |
858 | if (total_rp_cnt == this_rp_cnt) | |
859 | break; | |
860 | ||
861 | /* If some more RPs for the same group pending, | |
862 | * fill grp hdr | |
863 | */ | |
864 | memcpy(pkt, (uint8_t *)grpinfo, | |
865 | PIM_BSM_GRP_LEN); | |
866 | curgrp = (struct bsmmsg_grpinfo *)pkt; | |
867 | pkt += PIM_BSM_GRP_LEN; | |
868 | this_pkt_rem -= PIM_BSM_GRP_LEN; | |
869 | pak_pending = false; | |
870 | } else { | |
871 | /* We filled something but not yet sent out */ | |
872 | pak_pending = true; | |
873 | } | |
874 | } /* while RP count */ | |
875 | } /*while parsed len */ | |
876 | ||
877 | /* Send if we have any unsent packet */ | |
878 | if (pak_pending) { | |
879 | this_pkt_len = pim_mtu - this_pkt_rem; | |
145e4c38 DL |
880 | pim_msg_build_header(pim_ifp->primary_address, dst_addr, |
881 | pak_start, this_pkt_len, | |
40270c35 | 882 | PIM_MSG_TYPE_BOOTSTRAP, no_fwd); |
883 | pim_bsm_send_intf(pak_start, (pim_mtu - this_pkt_rem), ifp, | |
884 | dst_addr); | |
885 | } | |
886 | XFREE(MTYPE_PIM_BSM_PKT_VAR_MEM, pak_start); | |
887 | return true; | |
888 | } | |
889 | ||
79d97386 | 890 | static void pim_bsm_fwd_whole_sz(struct pim_instance *pim, uint8_t *buf, |
891 | uint32_t len, int sz) | |
892 | { | |
893 | struct interface *ifp; | |
894 | struct pim_interface *pim_ifp; | |
29fd9fca | 895 | pim_addr dst_addr; |
79d97386 | 896 | uint32_t pim_mtu; |
2951a7a4 QY |
897 | bool no_fwd = false; |
898 | bool ret = false; | |
79d97386 | 899 | |
900 | /* For now only global scope zone is supported, so send on all | |
901 | * pim interfaces in the vrf | |
902 | */ | |
903 | dst_addr = qpim_all_pim_routers_addr; | |
904 | FOR_ALL_INTERFACES (pim->vrf, ifp) { | |
905 | pim_ifp = ifp->info; | |
906 | if ((!pim_ifp) || (!pim_ifp->bsm_enable)) | |
907 | continue; | |
9255f21e | 908 | |
909 | /* | |
910 | * RFC 5059 Sec 3.4: | |
911 | * When a Bootstrap message is forwarded, it is forwarded out | |
912 | * of every multicast-capable interface that has PIM neighbors. | |
913 | * | |
914 | * So skipping pim interfaces with no neighbors. | |
915 | */ | |
916 | if (listcount(pim_ifp->pim_neighbor_list) == 0) | |
917 | continue; | |
918 | ||
79d97386 | 919 | pim_hello_require(ifp); |
920 | pim_mtu = ifp->mtu - MAX_IP_HDR_LEN; | |
921 | if (pim_mtu < len) { | |
40270c35 | 922 | ret = pim_bsm_frag_send(buf, len, ifp, pim_mtu, |
923 | dst_addr, no_fwd); | |
924 | if (PIM_DEBUG_BSM) | |
925 | zlog_debug("%s: pim_bsm_frag_send returned %s", | |
15569c58 | 926 | __func__, ret ? "TRUE" : "FALSE"); |
79d97386 | 927 | } else { |
145e4c38 DL |
928 | pim_msg_build_header(pim_ifp->primary_address, dst_addr, |
929 | buf, len, PIM_MSG_TYPE_BOOTSTRAP, | |
79d97386 | 930 | no_fwd); |
931 | if (!pim_bsm_send_intf(buf, len, ifp, dst_addr)) { | |
932 | if (PIM_DEBUG_BSM) | |
933 | zlog_debug( | |
2951a7a4 | 934 | "%s: pim_bsm_send_intf returned false", |
15569c58 | 935 | __func__); |
79d97386 | 936 | } |
937 | } | |
938 | } | |
939 | } | |
940 | ||
6bb2ef35 | 941 | bool pim_bsm_new_nbr_fwd(struct pim_neighbor *neigh, struct interface *ifp) |
942 | { | |
29fd9fca | 943 | pim_addr dst_addr; |
6bb2ef35 | 944 | struct pim_interface *pim_ifp; |
945 | struct bsm_scope *scope; | |
d4a4525c | 946 | struct bsm_frag *bsfrag; |
6bb2ef35 | 947 | char neigh_src_str[INET_ADDRSTRLEN]; |
948 | uint32_t pim_mtu; | |
949 | bool no_fwd = true; | |
950 | bool ret = false; | |
951 | ||
9bb93fa0 DL |
952 | if (PIM_DEBUG_BSM) |
953 | zlog_debug("%s: New neighbor %pPA seen on %s", __func__, | |
954 | &neigh->source_addr, ifp->name); | |
6bb2ef35 | 955 | |
956 | pim_ifp = ifp->info; | |
957 | ||
958 | /* DR only forwards BSM packet */ | |
034db86b | 959 | if (!pim_addr_cmp(pim_ifp->pim_dr_addr, pim_ifp->primary_address)) { |
6bb2ef35 | 960 | if (PIM_DEBUG_BSM) |
961 | zlog_debug( | |
962 | "%s: It is not DR, so don't forward BSM packet", | |
5e81f5dd | 963 | __func__); |
6bb2ef35 | 964 | } |
965 | ||
966 | if (!pim_ifp->bsm_enable) { | |
967 | if (PIM_DEBUG_BSM) | |
5e81f5dd DS |
968 | zlog_debug("%s: BSM proc not enabled on %s", __func__, |
969 | ifp->name); | |
6bb2ef35 | 970 | return ret; |
971 | } | |
972 | ||
973 | scope = &pim_ifp->pim->global_scope; | |
974 | ||
d4a4525c | 975 | if (!bsm_frags_count(scope->bsm_frags)) { |
6bb2ef35 | 976 | if (PIM_DEBUG_BSM) |
977 | zlog_debug("%s: BSM list for the scope is empty", | |
5e81f5dd | 978 | __func__); |
6bb2ef35 | 979 | return ret; |
980 | } | |
981 | ||
982 | if (!pim_ifp->ucast_bsm_accept) { | |
983 | dst_addr = qpim_all_pim_routers_addr; | |
984 | if (PIM_DEBUG_BSM) | |
5e81f5dd DS |
985 | zlog_debug("%s: Sending BSM mcast to %s", __func__, |
986 | neigh_src_str); | |
6bb2ef35 | 987 | } else { |
988 | dst_addr = neigh->source_addr; | |
989 | if (PIM_DEBUG_BSM) | |
5e81f5dd DS |
990 | zlog_debug("%s: Sending BSM ucast to %s", __func__, |
991 | neigh_src_str); | |
6bb2ef35 | 992 | } |
993 | pim_mtu = ifp->mtu - MAX_IP_HDR_LEN; | |
994 | pim_hello_require(ifp); | |
995 | ||
d4a4525c DL |
996 | frr_each (bsm_frags, scope->bsm_frags, bsfrag) { |
997 | if (pim_mtu < bsfrag->size) { | |
998 | ret = pim_bsm_frag_send(bsfrag->data, bsfrag->size, ifp, | |
999 | pim_mtu, dst_addr, no_fwd); | |
6bb2ef35 | 1000 | if (!ret) { |
1001 | if (PIM_DEBUG_BSM) | |
1002 | zlog_debug( | |
1003 | "%s: pim_bsm_frag_send failed", | |
5e81f5dd | 1004 | __func__); |
6bb2ef35 | 1005 | } |
1006 | } else { | |
1007 | /* Pim header needs to be constructed */ | |
145e4c38 DL |
1008 | pim_msg_build_header(pim_ifp->primary_address, dst_addr, |
1009 | bsfrag->data, bsfrag->size, | |
6bb2ef35 | 1010 | PIM_MSG_TYPE_BOOTSTRAP, no_fwd); |
d4a4525c DL |
1011 | ret = pim_bsm_send_intf(bsfrag->data, bsfrag->size, ifp, |
1012 | dst_addr); | |
6bb2ef35 | 1013 | if (!ret) { |
1014 | if (PIM_DEBUG_BSM) | |
1015 | zlog_debug( | |
1016 | "%s: pim_bsm_frag_send failed", | |
5e81f5dd | 1017 | __func__); |
6bb2ef35 | 1018 | } |
1019 | } | |
1020 | } | |
1021 | return ret; | |
1022 | } | |
1023 | ||
d0e418b4 | 1024 | struct bsgrp_node *pim_bsm_get_bsgrp_node(struct bsm_scope *scope, |
1025 | struct prefix *grp) | |
1026 | { | |
1027 | struct route_node *rn; | |
1028 | struct bsgrp_node *bsgrp; | |
1029 | ||
1030 | rn = route_node_lookup(scope->bsrp_table, grp); | |
1031 | if (!rn) { | |
1032 | if (PIM_DEBUG_BSM) | |
1033 | zlog_debug("%s: Route node doesn't exist for the group", | |
15569c58 | 1034 | __func__); |
d0e418b4 | 1035 | return NULL; |
1036 | } | |
1037 | bsgrp = rn->info; | |
1038 | route_unlock_node(rn); | |
1039 | ||
1040 | return bsgrp; | |
1041 | } | |
5acde1cf | 1042 | |
7b3e6ba1 | 1043 | static uint32_t hash_calc_on_grp_rp(struct prefix group, struct in_addr rp, |
1044 | uint8_t hashmasklen) | |
1045 | { | |
1046 | uint64_t temp; | |
1047 | uint32_t hash; | |
1048 | uint32_t grpaddr; | |
1049 | uint32_t rp_add; | |
1050 | uint32_t mask = 0xffffffff; | |
1051 | ||
1052 | /* mask to be made zero if hashmasklen is 0 because mask << 32 | |
1053 | * may not give 0. hashmasklen can be 0 to 32. | |
1054 | */ | |
1055 | if (hashmasklen == 0) | |
1056 | mask = 0; | |
1057 | ||
1058 | /* in_addr stores ip in big endian, hence network byte order | |
1059 | * convert to uint32 before processing hash | |
1060 | */ | |
1061 | grpaddr = ntohl(group.u.prefix4.s_addr); | |
1062 | /* Avoid shifting by 32 bit on a 32 bit register */ | |
1063 | if (hashmasklen) | |
1064 | grpaddr = grpaddr & ((mask << (32 - hashmasklen))); | |
1065 | else | |
1066 | grpaddr = grpaddr & mask; | |
1067 | rp_add = ntohl(rp.s_addr); | |
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; | |
1086 | memcpy(&bsm_rpinfo->rp_address, &rp->rpaddr.addr, | |
1087 | sizeof(struct in_addr)); | |
1088 | bsm_rpinfo->elapse_time = 0; | |
1089 | ||
1090 | /* Back pointer to the group node. */ | |
1091 | bsm_rpinfo->bsgrp_node = grpnode; | |
1092 | ||
1093 | /* update hash for this rp node */ | |
1094 | bsm_rpinfo->hash = hash_calc_on_grp_rp(grpnode->group, rp->rpaddr.addr, | |
1095 | hashMask_len); | |
fdab2940 | 1096 | if (bsm_rpinfos_add(grpnode->partial_bsrp_list, bsm_rpinfo) == NULL) { |
7b3e6ba1 | 1097 | if (PIM_DEBUG_BSM) |
1098 | zlog_debug( | |
63efca0e | 1099 | "%s, bs_rpinfo node added to the partial bs_rplist.", |
15569c58 | 1100 | __func__); |
7b3e6ba1 | 1101 | return true; |
1102 | } | |
1103 | ||
1104 | if (PIM_DEBUG_BSM) | |
63efca0e | 1105 | zlog_debug("%s: list node not added", __func__); |
7b3e6ba1 | 1106 | |
fdab2940 | 1107 | XFREE(MTYPE_PIM_BSRP_INFO, bsm_rpinfo); |
7b3e6ba1 | 1108 | return false; |
1109 | } | |
1110 | ||
1111 | static void pim_update_pending_rp_cnt(struct bsm_scope *sz, | |
1112 | struct bsgrp_node *bsgrp, | |
1113 | uint16_t bsm_frag_tag, | |
1114 | uint32_t total_rp_count) | |
1115 | { | |
1116 | if (bsgrp->pend_rp_cnt) { | |
1117 | /* received bsm is different packet , | |
1118 | * it is not same fragment. | |
1119 | */ | |
1120 | if (bsm_frag_tag != bsgrp->frag_tag) { | |
1121 | if (PIM_DEBUG_BSM) | |
1122 | zlog_debug( | |
63efca0e | 1123 | "%s,Received a new BSM ,so clear the pending bs_rpinfo list.", |
15569c58 | 1124 | __func__); |
fdab2940 | 1125 | pim_bsm_rpinfos_free(bsgrp->partial_bsrp_list); |
7b3e6ba1 | 1126 | bsgrp->pend_rp_cnt = total_rp_count; |
1127 | } | |
1128 | } else | |
1129 | bsgrp->pend_rp_cnt = total_rp_count; | |
1130 | ||
1131 | bsgrp->frag_tag = bsm_frag_tag; | |
1132 | } | |
1133 | ||
1134 | /* Parsing BSR packet and adding to partial list of corresponding bsgrp node */ | |
1135 | static bool pim_bsm_parse_install_g2rp(struct bsm_scope *scope, uint8_t *buf, | |
1136 | int buflen, uint16_t bsm_frag_tag) | |
1137 | { | |
1138 | struct bsmmsg_grpinfo grpinfo; | |
1139 | struct bsmmsg_rpinfo rpinfo; | |
1140 | struct prefix group; | |
1141 | struct bsgrp_node *bsgrp = NULL; | |
1142 | int frag_rp_cnt = 0; | |
1143 | int offset = 0; | |
1144 | int ins_count = 0; | |
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)); | |
1156 | ||
1157 | if (PIM_DEBUG_BSM) { | |
1158 | char grp_str[INET_ADDRSTRLEN]; | |
1159 | ||
1160 | pim_inet4_dump("<Group?>", grpinfo.group.addr, grp_str, | |
1161 | sizeof(grp_str)); | |
1162 | zlog_debug( | |
63efca0e | 1163 | "%s, Group %s Rpcount:%d Fragment-Rp-count:%d", |
15569c58 | 1164 | __func__, grp_str, grpinfo.rp_count, |
7b3e6ba1 | 1165 | grpinfo.frag_rp_count); |
1166 | } | |
1167 | ||
1168 | buf += sizeof(struct bsmmsg_grpinfo); | |
1169 | offset += sizeof(struct bsmmsg_grpinfo); | |
1170 | ||
7b3e6ba1 | 1171 | group.family = AF_INET; |
b1945363 DS |
1172 | if (grpinfo.group.mask > IPV4_MAX_BITLEN) { |
1173 | if (PIM_DEBUG_BSM) | |
15569c58 DA |
1174 | zlog_debug( |
1175 | "%s, v4 prefix length specified: %d is too long", | |
1176 | __func__, grpinfo.group.mask); | |
b1945363 DS |
1177 | return false; |
1178 | } | |
7b3e6ba1 | 1179 | group.prefixlen = grpinfo.group.mask; |
1180 | group.u.prefix4.s_addr = grpinfo.group.addr.s_addr; | |
1181 | ||
1182 | /* Get the Group node for the BSM rp table */ | |
1183 | bsgrp = pim_bsm_get_bsgrp_node(scope, &group); | |
1184 | ||
43038bd5 DL |
1185 | if (grpinfo.rp_count == 0) { |
1186 | struct bsm_rpinfo *old_rpinfo; | |
1187 | ||
1188 | /* BSR explicitly no longer has RPs for this group */ | |
1189 | if (!bsgrp) | |
1190 | continue; | |
1191 | ||
1192 | if (PIM_DEBUG_BSM) { | |
1193 | char grp_str[INET_ADDRSTRLEN]; | |
1194 | ||
1195 | pim_inet4_dump("<Group?>", grpinfo.group.addr, | |
1196 | grp_str, sizeof(grp_str)); | |
1197 | zlog_debug("%s, Rp count is zero for group: %s", | |
1198 | __func__, grp_str); | |
1199 | } | |
1200 | ||
1201 | old_rpinfo = bsm_rpinfos_first(bsgrp->bsrp_list); | |
1202 | if (old_rpinfo) | |
1203 | pim_rp_del(scope->pim, old_rpinfo->rp_address, | |
1204 | group, NULL, RP_SRC_BSR); | |
1205 | ||
1206 | pim_free_bsgrp_node(scope->bsrp_table, &bsgrp->group); | |
1207 | pim_free_bsgrp_data(bsgrp); | |
1208 | continue; | |
1209 | } | |
1210 | ||
7b3e6ba1 | 1211 | if (!bsgrp) { |
1212 | if (PIM_DEBUG_BSM) | |
63efca0e DL |
1213 | zlog_debug("%s, Create new BSM Group node.", |
1214 | __func__); | |
7b3e6ba1 | 1215 | |
1216 | /* create a new node to be added to the tree. */ | |
1217 | bsgrp = pim_bsm_new_bsgrp_node(scope->bsrp_table, | |
1218 | &group); | |
1219 | ||
1220 | if (!bsgrp) { | |
1221 | zlog_debug( | |
63efca0e | 1222 | "%s, Failed to get the BSM group node.", |
15569c58 | 1223 | __func__); |
7b3e6ba1 | 1224 | continue; |
1225 | } | |
1226 | ||
1227 | bsgrp->scope = scope; | |
1228 | } | |
1229 | ||
1230 | pim_update_pending_rp_cnt(scope, bsgrp, bsm_frag_tag, | |
1231 | grpinfo.rp_count); | |
1232 | frag_rp_cnt = grpinfo.frag_rp_count; | |
1233 | ins_count = 0; | |
1234 | ||
1235 | while (frag_rp_cnt--) { | |
b1945363 DS |
1236 | if (offset + (int)sizeof(struct bsmmsg_rpinfo) |
1237 | > buflen) { | |
1238 | if (PIM_DEBUG_BSM) | |
1239 | zlog_debug( | |
1240 | "%s, buflen received: %u is less than the internal data structure of the packet would suggest", | |
15569c58 | 1241 | __func__, buflen); |
b1945363 DS |
1242 | return false; |
1243 | } | |
1244 | ||
7b3e6ba1 | 1245 | /* Extract RP address tlv from BSM */ |
1246 | memcpy(&rpinfo, buf, sizeof(struct bsmmsg_rpinfo)); | |
1247 | rpinfo.rp_holdtime = ntohs(rpinfo.rp_holdtime); | |
1248 | buf += sizeof(struct bsmmsg_rpinfo); | |
1249 | offset += sizeof(struct bsmmsg_rpinfo); | |
1250 | ||
1251 | if (PIM_DEBUG_BSM) { | |
1252 | char rp_str[INET_ADDRSTRLEN]; | |
1253 | ||
1254 | pim_inet4_dump("<Rpaddr?>", rpinfo.rpaddr.addr, | |
1255 | rp_str, sizeof(rp_str)); | |
1256 | zlog_debug( | |
63efca0e | 1257 | "%s, Rp address - %s; pri:%d hold:%d", |
15569c58 DA |
1258 | __func__, rp_str, rpinfo.rp_pri, |
1259 | rpinfo.rp_holdtime); | |
7b3e6ba1 | 1260 | } |
1261 | ||
1262 | /* Call Install api to update grp-rp mappings */ | |
1263 | if (pim_install_bsm_grp_rp(scope->pim, bsgrp, &rpinfo)) | |
1264 | ins_count++; | |
1265 | } | |
1266 | ||
1267 | bsgrp->pend_rp_cnt -= ins_count; | |
1268 | ||
1269 | if (!bsgrp->pend_rp_cnt) { | |
1270 | if (PIM_DEBUG_BSM) | |
1271 | zlog_debug( | |
1272 | "%s, Recvd all the rps for this group, so bsrp list with penidng rp list.", | |
15569c58 | 1273 | __func__); |
20fd30e5 | 1274 | /* replace the bsrp_list with pending list */ |
1275 | pim_instate_pend_list(bsgrp); | |
7b3e6ba1 | 1276 | } |
1277 | } | |
1278 | return true; | |
1279 | } | |
1280 | ||
76bfa030 | 1281 | int pim_bsm_process(struct interface *ifp, pim_sgaddr *sg, uint8_t *buf, |
5acde1cf | 1282 | uint32_t buf_size, bool no_fwd) |
1283 | { | |
1284 | struct bsm_hdr *bshdr; | |
79d97386 | 1285 | int sz = PIM_GBL_SZ_ID; |
5acde1cf | 1286 | struct bsmmsg_grpinfo *msg_grp; |
1287 | struct pim_interface *pim_ifp = NULL; | |
d4a4525c | 1288 | struct bsm_frag *bsfrag; |
5acde1cf | 1289 | struct pim_instance *pim; |
1290 | char bsr_str[INET_ADDRSTRLEN]; | |
1291 | uint16_t frag_tag; | |
2951a7a4 | 1292 | bool empty_bsm = false; |
5acde1cf | 1293 | |
1294 | /* BSM Packet acceptance validation */ | |
1295 | pim_ifp = ifp->info; | |
1296 | if (!pim_ifp) { | |
1297 | if (PIM_DEBUG_BSM) | |
1298 | zlog_debug("%s: multicast not enabled on interface %s", | |
15569c58 | 1299 | __func__, ifp->name); |
5acde1cf | 1300 | return -1; |
1301 | } | |
1302 | ||
fd3eb43d | 1303 | if (pim_ifp->pim_passive_enable) { |
1304 | if (PIM_DEBUG_PIM_PACKETS) | |
1305 | zlog_debug( | |
1306 | "skip receiving PIM message on passive interface %s", | |
1307 | ifp->name); | |
1308 | return 0; | |
1309 | } | |
1310 | ||
5acde1cf | 1311 | pim_ifp->pim_ifstat_bsm_rx++; |
1312 | pim = pim_ifp->pim; | |
1313 | pim->bsm_rcvd++; | |
1314 | ||
1315 | /* Drop if bsm processing is disabled on interface */ | |
1316 | if (!pim_ifp->bsm_enable) { | |
15569c58 DA |
1317 | zlog_warn("%s: BSM not enabled on interface %s", __func__, |
1318 | ifp->name); | |
5acde1cf | 1319 | pim_ifp->pim_ifstat_bsm_cfg_miss++; |
1320 | pim->bsm_dropped++; | |
1321 | return -1; | |
1322 | } | |
1323 | ||
d83a854b | 1324 | if (buf_size < (PIM_MSG_HEADER_LEN + sizeof(struct bsm_hdr))) { |
b1945363 | 1325 | if (PIM_DEBUG_BSM) |
15569c58 DA |
1326 | zlog_debug( |
1327 | "%s: received buffer length of %d which is too small to properly decode", | |
1328 | __func__, buf_size); | |
b1945363 DS |
1329 | return -1; |
1330 | } | |
1331 | ||
5acde1cf | 1332 | bshdr = (struct bsm_hdr *)(buf + PIM_MSG_HEADER_LEN); |
1333 | pim_inet4_dump("<bsr?>", bshdr->bsr_addr.addr, bsr_str, | |
1334 | sizeof(bsr_str)); | |
12256b84 | 1335 | if (bshdr->hm_len > IPV4_MAX_BITLEN) { |
6cde4b45 | 1336 | zlog_warn("Bad hashmask length for IPv4; got %hhu, expected value in range 0-32", |
817f8933 QY |
1337 | bshdr->hm_len); |
1338 | pim->bsm_dropped++; | |
1339 | return -1; | |
1340 | } | |
5acde1cf | 1341 | pim->global_scope.hashMasklen = bshdr->hm_len; |
1342 | frag_tag = ntohs(bshdr->frag_tag); | |
1343 | ||
1344 | /* Identify empty BSM */ | |
1345 | if ((buf_size - PIM_BSM_HDR_LEN - PIM_MSG_HEADER_LEN) < PIM_BSM_GRP_LEN) | |
1346 | empty_bsm = true; | |
1347 | ||
1348 | if (!empty_bsm) { | |
1349 | msg_grp = (struct bsmmsg_grpinfo *)(buf + PIM_MSG_HEADER_LEN | |
1350 | + PIM_BSM_HDR_LEN); | |
1351 | /* Currently we don't support scope zoned BSM */ | |
1352 | if (msg_grp->group.sz) { | |
1353 | if (PIM_DEBUG_BSM) | |
1354 | zlog_debug( | |
1355 | "%s : Administratively scoped range BSM received", | |
15569c58 | 1356 | __func__); |
5acde1cf | 1357 | pim_ifp->pim_ifstat_bsm_invalid_sz++; |
1358 | pim->bsm_dropped++; | |
1359 | return -1; | |
1360 | } | |
1361 | } | |
1362 | ||
1363 | /* Drop if bsr is not preferred bsr */ | |
1364 | if (!is_preferred_bsr(pim, bshdr->bsr_addr.addr, bshdr->bsr_prio)) { | |
1365 | if (PIM_DEBUG_BSM) | |
1366 | zlog_debug("%s : Received a non-preferred BSM", | |
15569c58 | 1367 | __func__); |
5acde1cf | 1368 | pim->bsm_dropped++; |
1369 | return -1; | |
1370 | } | |
1371 | ||
1372 | if (no_fwd) { | |
1373 | /* only accept no-forward BSM if quick refresh on startup */ | |
1374 | if ((pim->global_scope.accept_nofwd_bsm) | |
1375 | || (frag_tag == pim->global_scope.bsm_frag_tag)) { | |
1376 | pim->global_scope.accept_nofwd_bsm = false; | |
1377 | } else { | |
1378 | if (PIM_DEBUG_BSM) | |
1379 | zlog_debug( | |
1380 | "%s : nofwd_bsm received on %s when accpt_nofwd_bsm false", | |
15569c58 | 1381 | __func__, bsr_str); |
5acde1cf | 1382 | pim->bsm_dropped++; |
1383 | pim_ifp->pim_ifstat_ucast_bsm_cfg_miss++; | |
1384 | return -1; | |
1385 | } | |
1386 | } | |
1387 | ||
809c11a9 | 1388 | #if PIM_IPV == 4 |
76bfa030 | 1389 | if (!pim_addr_cmp(sg->grp, qpim_all_pim_routers_addr)) |
809c11a9 DL |
1390 | #else |
1391 | if (0) | |
1392 | #endif | |
1393 | { | |
4efdb9c6 DL |
1394 | /* Multicast BSMs are only accepted if source interface & IP |
1395 | * match RPF towards the BSR's IP address, or they have | |
1396 | * no-forward set | |
1397 | */ | |
76bfa030 MR |
1398 | if (!no_fwd && !pim_nht_bsr_rpf_check(pim, bshdr->bsr_addr.addr, |
1399 | ifp, sg->src)) { | |
4efdb9c6 DL |
1400 | if (PIM_DEBUG_BSM) |
1401 | zlog_debug( | |
76bfa030 MR |
1402 | "BSM check: RPF to BSR %s is not %pPA%%%s", |
1403 | bsr_str, &sg->src, ifp->name); | |
4efdb9c6 DL |
1404 | pim->bsm_dropped++; |
1405 | return -1; | |
5acde1cf | 1406 | } |
76bfa030 | 1407 | } else if (if_address_is_local(&sg->grp, PIM_AF, pim->vrf->vrf_id)) { |
5acde1cf | 1408 | /* Unicast BSM received - if ucast bsm not enabled on |
1409 | * the interface, drop it | |
1410 | */ | |
1411 | if (!pim_ifp->ucast_bsm_accept) { | |
1412 | if (PIM_DEBUG_BSM) | |
1413 | zlog_debug( | |
1414 | "%s : Unicast BSM not enabled on interface %s", | |
15569c58 | 1415 | __func__, ifp->name); |
5acde1cf | 1416 | pim_ifp->pim_ifstat_ucast_bsm_cfg_miss++; |
1417 | pim->bsm_dropped++; | |
1418 | return -1; | |
1419 | } | |
1420 | ||
1421 | } else { | |
1422 | if (PIM_DEBUG_BSM) | |
1423 | zlog_debug("%s : Invalid destination address", | |
15569c58 | 1424 | __func__); |
5acde1cf | 1425 | pim->bsm_dropped++; |
1426 | return -1; | |
1427 | } | |
1428 | ||
1429 | if (empty_bsm) { | |
1430 | if (PIM_DEBUG_BSM) | |
15569c58 | 1431 | zlog_debug("%s : Empty Pref BSM received", __func__); |
5acde1cf | 1432 | } |
7b3e6ba1 | 1433 | /* Parse Update bsm rp table and install/uninstall rp if required */ |
1434 | if (!pim_bsm_parse_install_g2rp( | |
1435 | &pim_ifp->pim->global_scope, | |
1436 | (buf + PIM_BSM_HDR_LEN + PIM_MSG_HEADER_LEN), | |
1437 | (buf_size - PIM_BSM_HDR_LEN - PIM_MSG_HEADER_LEN), | |
1438 | frag_tag)) { | |
1439 | if (PIM_DEBUG_BSM) { | |
63efca0e | 1440 | zlog_debug("%s, Parsing BSM failed.", __func__); |
7b3e6ba1 | 1441 | } |
1442 | pim->bsm_dropped++; | |
1443 | return -1; | |
1444 | } | |
5acde1cf | 1445 | /* Restart the bootstrap timer */ |
1446 | pim_bs_timer_restart(&pim_ifp->pim->global_scope, | |
1447 | PIM_BSR_DEFAULT_TIMEOUT); | |
1448 | ||
1449 | /* If new BSM received, clear the old bsm database */ | |
1450 | if (pim_ifp->pim->global_scope.bsm_frag_tag != frag_tag) { | |
1451 | if (PIM_DEBUG_BSM) { | |
1452 | zlog_debug("%s: Current frag tag: %d Frag teg rcvd: %d", | |
15569c58 | 1453 | __func__, |
5acde1cf | 1454 | pim_ifp->pim->global_scope.bsm_frag_tag, |
1455 | frag_tag); | |
1456 | } | |
d4a4525c | 1457 | pim_bsm_frags_free(&pim_ifp->pim->global_scope); |
5acde1cf | 1458 | pim_ifp->pim->global_scope.bsm_frag_tag = frag_tag; |
1459 | } | |
1460 | ||
1461 | /* update the scope information from bsm */ | |
1462 | pim_bsm_update(pim, bshdr->bsr_addr.addr, bshdr->bsr_prio); | |
79d97386 | 1463 | |
1464 | if (!no_fwd) { | |
1465 | pim_bsm_fwd_whole_sz(pim_ifp->pim, buf, buf_size, sz); | |
d4a4525c DL |
1466 | bsfrag = XCALLOC(MTYPE_PIM_BSM_FRAG, |
1467 | sizeof(struct bsm_frag) + buf_size); | |
79d97386 | 1468 | |
d4a4525c DL |
1469 | bsfrag->size = buf_size; |
1470 | memcpy(bsfrag->data, buf, buf_size); | |
1471 | bsm_frags_add_tail(pim_ifp->pim->global_scope.bsm_frags, | |
1472 | bsfrag); | |
79d97386 | 1473 | } |
1474 | ||
5acde1cf | 1475 | return 0; |
1476 | } |