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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" |
361b5843 | 39 | |
40 | /* Functions forward declaration */ | |
41 | static void pim_bs_timer_start(struct bsm_scope *scope, int bs_timeout); | |
a5164e97 | 42 | static void pim_g2rp_timer_start(struct bsm_rpinfo *bsrp, int hold_time); |
43 | static inline void pim_g2rp_timer_restart(struct bsm_rpinfo *bsrp, | |
44 | int hold_time); | |
23255dfd | 45 | |
46 | /* Memory Types */ | |
bf8d3d6a | 47 | DEFINE_MTYPE_STATIC(PIMD, PIM_BSGRP_NODE, "PIM BSR advertised grp info"); |
fdab2940 | 48 | DEFINE_MTYPE_STATIC(PIMD, PIM_BSRP_INFO, "PIM BSR advertised RP info"); |
d4a4525c | 49 | DEFINE_MTYPE_STATIC(PIMD, PIM_BSM_FRAG, "PIM BSM fragment"); |
bf8d3d6a | 50 | DEFINE_MTYPE_STATIC(PIMD, PIM_BSM_PKT_VAR_MEM, "PIM BSM Packet"); |
361b5843 | 51 | |
79d97386 | 52 | /* All bsm packets forwarded shall be fit within ip mtu less iphdr(max) */ |
53 | #define MAX_IP_HDR_LEN 24 | |
54 | ||
16c926c8 | 55 | /* pim_bsm_write_config - Write the interface pim bsm configuration.*/ |
d0e418b4 | 56 | void pim_bsm_write_config(struct vty *vty, struct interface *ifp) |
16c926c8 | 57 | { |
58 | struct pim_interface *pim_ifp = ifp->info; | |
59 | ||
60 | if (pim_ifp) { | |
61 | if (!pim_ifp->bsm_enable) | |
d17b6892 | 62 | vty_out(vty, " no " PIM_AF_NAME " pim bsm\n"); |
16c926c8 | 63 | if (!pim_ifp->ucast_bsm_accept) |
d17b6892 | 64 | vty_out(vty, " no " PIM_AF_NAME " pim unicast-bsm\n"); |
16c926c8 | 65 | } |
66 | } | |
67 | ||
fdab2940 DL |
68 | static void pim_bsm_rpinfo_free(struct bsm_rpinfo *bsrp_info) |
69 | { | |
70 | THREAD_OFF(bsrp_info->g2rp_timer); | |
71 | XFREE(MTYPE_PIM_BSRP_INFO, bsrp_info); | |
72 | } | |
73 | ||
b09bd804 | 74 | static void pim_bsm_rpinfos_free(struct bsm_rpinfos_head *head) |
fdab2940 DL |
75 | { |
76 | struct bsm_rpinfo *bsrp_info; | |
77 | ||
78 | while ((bsrp_info = bsm_rpinfos_pop(head))) | |
79 | pim_bsm_rpinfo_free(bsrp_info); | |
80 | } | |
81 | ||
b09bd804 | 82 | static void pim_free_bsgrp_data(struct bsgrp_node *bsgrp_node) |
361b5843 | 83 | { |
fdab2940 DL |
84 | pim_bsm_rpinfos_free(bsgrp_node->bsrp_list); |
85 | pim_bsm_rpinfos_free(bsgrp_node->partial_bsrp_list); | |
361b5843 | 86 | XFREE(MTYPE_PIM_BSGRP_NODE, bsgrp_node); |
87 | } | |
88 | ||
b09bd804 | 89 | static void pim_free_bsgrp_node(struct route_table *rt, struct prefix *grp) |
c295e391 | 90 | { |
91 | struct route_node *rn; | |
92 | ||
93 | rn = route_node_lookup(rt, grp); | |
94 | if (rn) { | |
95 | rn->info = NULL; | |
96 | route_unlock_node(rn); | |
97 | route_unlock_node(rn); | |
98 | } | |
99 | } | |
100 | ||
d4a4525c | 101 | static void pim_bsm_frag_free(struct bsm_frag *bsfrag) |
361b5843 | 102 | { |
d4a4525c DL |
103 | XFREE(MTYPE_PIM_BSM_FRAG, bsfrag); |
104 | } | |
105 | ||
b09bd804 | 106 | static void pim_bsm_frags_free(struct bsm_scope *scope) |
d4a4525c DL |
107 | { |
108 | struct bsm_frag *bsfrag; | |
109 | ||
110 | while ((bsfrag = bsm_frags_pop(scope->bsm_frags))) | |
111 | pim_bsm_frag_free(bsfrag); | |
361b5843 | 112 | } |
113 | ||
fdab2940 DL |
114 | int pim_bsm_rpinfo_cmp(const struct bsm_rpinfo *node1, |
115 | const struct bsm_rpinfo *node2) | |
7b3e6ba1 | 116 | { |
117 | /* RP election Algo : | |
118 | * Step-1 : Loweset Rp priority will have higher precedance. | |
119 | * Step-2 : If priority same then higher hash val will have | |
120 | * higher precedance. | |
121 | * Step-3 : If Hash val is same then highest rp address will | |
122 | * become elected RP. | |
123 | */ | |
124 | if (node1->rp_prio < node2->rp_prio) | |
125 | return -1; | |
126 | if (node1->rp_prio > node2->rp_prio) | |
127 | return 1; | |
128 | if (node1->hash < node2->hash) | |
129 | return 1; | |
130 | if (node1->hash > node2->hash) | |
131 | return -1; | |
132 | if (node1->rp_address.s_addr < node2->rp_address.s_addr) | |
133 | return 1; | |
134 | if (node1->rp_address.s_addr > node2->rp_address.s_addr) | |
135 | return -1; | |
136 | return 0; | |
137 | } | |
138 | ||
7b3e6ba1 | 139 | static struct bsgrp_node *pim_bsm_new_bsgrp_node(struct route_table *rt, |
140 | struct prefix *grp) | |
141 | { | |
142 | struct route_node *rn; | |
143 | struct bsgrp_node *bsgrp; | |
144 | ||
145 | rn = route_node_get(rt, grp); | |
146 | if (!rn) { | |
15569c58 | 147 | zlog_warn("%s: route node creation failed", __func__); |
7b3e6ba1 | 148 | return NULL; |
149 | } | |
150 | bsgrp = XCALLOC(MTYPE_PIM_BSGRP_NODE, sizeof(struct bsgrp_node)); | |
151 | ||
7b3e6ba1 | 152 | rn->info = bsgrp; |
fdab2940 DL |
153 | bsm_rpinfos_init(bsgrp->bsrp_list); |
154 | bsm_rpinfos_init(bsgrp->partial_bsrp_list); | |
7b3e6ba1 | 155 | |
156 | prefix_copy(&bsgrp->group, grp); | |
157 | return bsgrp; | |
158 | } | |
159 | ||
cc9f21da | 160 | static void pim_on_bs_timer(struct thread *t) |
23255dfd | 161 | { |
c843f56d | 162 | struct route_node *rn; |
163 | struct bsm_scope *scope; | |
164 | struct bsgrp_node *bsgrp_node; | |
165 | struct bsm_rpinfo *bsrp; | |
c843f56d | 166 | |
167 | scope = THREAD_ARG(t); | |
168 | THREAD_OFF(scope->bs_timer); | |
169 | ||
170 | if (PIM_DEBUG_BSM) | |
171 | zlog_debug("%s: Bootstrap Timer expired for scope: %d", | |
15569c58 | 172 | __func__, scope->sz_id); |
c843f56d | 173 | |
5f010b12 | 174 | pim_nht_bsr_del(scope->pim, scope->current_bsr); |
c843f56d | 175 | |
176 | /* Reset scope zone data */ | |
177 | scope->accept_nofwd_bsm = false; | |
178 | scope->state = ACCEPT_ANY; | |
179 | scope->current_bsr.s_addr = INADDR_ANY; | |
180 | scope->current_bsr_prio = 0; | |
181 | scope->current_bsr_first_ts = 0; | |
182 | scope->current_bsr_last_ts = 0; | |
183 | scope->bsm_frag_tag = 0; | |
d4a4525c | 184 | pim_bsm_frags_free(scope); |
c843f56d | 185 | |
186 | for (rn = route_top(scope->bsrp_table); rn; rn = route_next(rn)) { | |
187 | ||
188 | bsgrp_node = (struct bsgrp_node *)rn->info; | |
189 | if (!bsgrp_node) { | |
190 | if (PIM_DEBUG_BSM) | |
15569c58 | 191 | zlog_debug("%s: bsgrp_node is null", __func__); |
c843f56d | 192 | continue; |
193 | } | |
194 | /* Give grace time for rp to continue for another hold time */ | |
fdab2940 DL |
195 | bsrp = bsm_rpinfos_first(bsgrp_node->bsrp_list); |
196 | if (bsrp) | |
c843f56d | 197 | pim_g2rp_timer_restart(bsrp, bsrp->rp_holdtime); |
fdab2940 | 198 | |
c843f56d | 199 | /* clear pending list */ |
fdab2940 DL |
200 | pim_bsm_rpinfos_free(bsgrp_node->partial_bsrp_list); |
201 | bsgrp_node->pend_rp_cnt = 0; | |
c843f56d | 202 | } |
23255dfd | 203 | } |
204 | ||
b09bd804 | 205 | static void pim_bs_timer_stop(struct bsm_scope *scope) |
23255dfd | 206 | { |
207 | if (PIM_DEBUG_BSM) | |
15569c58 DA |
208 | zlog_debug("%s : BS timer being stopped of sz: %d", __func__, |
209 | scope->sz_id); | |
23255dfd | 210 | THREAD_OFF(scope->bs_timer); |
211 | } | |
212 | ||
213 | static void pim_bs_timer_start(struct bsm_scope *scope, int bs_timeout) | |
214 | { | |
215 | if (!scope) { | |
216 | if (PIM_DEBUG_BSM) | |
15569c58 | 217 | zlog_debug("%s : Invalid scope(NULL).", __func__); |
23255dfd | 218 | return; |
219 | } | |
220 | THREAD_OFF(scope->bs_timer); | |
221 | if (PIM_DEBUG_BSM) | |
15569c58 DA |
222 | zlog_debug( |
223 | "%s : starting bs timer for scope %d with timeout %d secs", | |
224 | __func__, scope->sz_id, bs_timeout); | |
23255dfd | 225 | thread_add_timer(router->master, pim_on_bs_timer, scope, bs_timeout, |
226 | &scope->bs_timer); | |
227 | } | |
228 | ||
5acde1cf | 229 | static inline void pim_bs_timer_restart(struct bsm_scope *scope, int bs_timeout) |
230 | { | |
231 | pim_bs_timer_start(scope, bs_timeout); | |
232 | } | |
233 | ||
361b5843 | 234 | void pim_bsm_proc_init(struct pim_instance *pim) |
235 | { | |
236 | memset(&pim->global_scope, 0, sizeof(struct bsm_scope)); | |
237 | ||
238 | pim->global_scope.sz_id = PIM_GBL_SZ_ID; | |
239 | pim->global_scope.bsrp_table = route_table_init(); | |
240 | pim->global_scope.accept_nofwd_bsm = true; | |
241 | pim->global_scope.state = NO_INFO; | |
242 | pim->global_scope.pim = pim; | |
d4a4525c | 243 | bsm_frags_init(pim->global_scope.bsm_frags); |
361b5843 | 244 | pim_bs_timer_start(&pim->global_scope, PIM_BS_TIME); |
245 | } | |
246 | ||
247 | void pim_bsm_proc_free(struct pim_instance *pim) | |
248 | { | |
249 | struct route_node *rn; | |
250 | struct bsgrp_node *bsgrp; | |
251 | ||
252 | pim_bs_timer_stop(&pim->global_scope); | |
d4a4525c | 253 | pim_bsm_frags_free(&pim->global_scope); |
361b5843 | 254 | |
d0e418b4 | 255 | for (rn = route_top(pim->global_scope.bsrp_table); rn; |
256 | rn = route_next(rn)) { | |
361b5843 | 257 | bsgrp = rn->info; |
258 | if (!bsgrp) | |
259 | continue; | |
260 | pim_free_bsgrp_data(bsgrp); | |
261 | } | |
262 | ||
4d19a911 | 263 | route_table_finish(pim->global_scope.bsrp_table); |
361b5843 | 264 | } |
265 | ||
c295e391 | 266 | static bool is_hold_time_elapsed(void *data) |
267 | { | |
268 | struct bsm_rpinfo *bsrp; | |
269 | ||
270 | bsrp = data; | |
271 | ||
272 | if (bsrp->elapse_time < bsrp->rp_holdtime) | |
273 | return false; | |
274 | else | |
275 | return true; | |
276 | } | |
277 | ||
cc9f21da | 278 | static void pim_on_g2rp_timer(struct thread *t) |
a5164e97 | 279 | { |
c295e391 | 280 | struct bsm_rpinfo *bsrp; |
281 | struct bsm_rpinfo *bsrp_node; | |
282 | struct bsgrp_node *bsgrp_node; | |
c295e391 | 283 | struct pim_instance *pim; |
284 | struct rp_info *rp_info; | |
285 | struct route_node *rn; | |
286 | uint16_t elapse; | |
287 | struct in_addr bsrp_addr; | |
288 | ||
289 | bsrp = THREAD_ARG(t); | |
290 | THREAD_OFF(bsrp->g2rp_timer); | |
291 | bsgrp_node = bsrp->bsgrp_node; | |
292 | ||
293 | /* elapse time is the hold time of expired node */ | |
294 | elapse = bsrp->rp_holdtime; | |
295 | bsrp_addr = bsrp->rp_address; | |
296 | ||
297 | /* update elapse for all bsrp nodes */ | |
fdab2940 | 298 | frr_each_safe (bsm_rpinfos, bsgrp_node->bsrp_list, bsrp_node) { |
c295e391 | 299 | bsrp_node->elapse_time += elapse; |
300 | ||
fdab2940 DL |
301 | if (is_hold_time_elapsed(bsrp_node)) { |
302 | bsm_rpinfos_del(bsgrp_node->bsrp_list, bsrp_node); | |
303 | pim_bsm_rpinfo_free(bsrp_node); | |
304 | } | |
305 | } | |
c295e391 | 306 | |
307 | /* Get the next elected rp node */ | |
fdab2940 | 308 | bsrp = bsm_rpinfos_first(bsgrp_node->bsrp_list); |
c295e391 | 309 | pim = bsgrp_node->scope->pim; |
310 | rn = route_node_lookup(pim->rp_table, &bsgrp_node->group); | |
311 | ||
312 | if (!rn) { | |
5e81f5dd | 313 | zlog_warn("%s: Route node doesn't exist", __func__); |
cc9f21da | 314 | return; |
c295e391 | 315 | } |
316 | ||
317 | rp_info = (struct rp_info *)rn->info; | |
318 | ||
319 | if (!rp_info) { | |
320 | route_unlock_node(rn); | |
cc9f21da | 321 | return; |
c295e391 | 322 | } |
323 | ||
324 | if (rp_info->rp_src != RP_SRC_STATIC) { | |
325 | /* If new rp available, change it else delete the existing */ | |
326 | if (bsrp) { | |
c295e391 | 327 | pim_g2rp_timer_start( |
328 | bsrp, (bsrp->rp_holdtime - bsrp->elapse_time)); | |
49b7b2c4 | 329 | pim_rp_change(pim, bsrp->rp_address, bsgrp_node->group, |
c295e391 | 330 | RP_SRC_BSR); |
331 | } else { | |
332 | pim_rp_del(pim, bsrp_addr, bsgrp_node->group, NULL, | |
333 | RP_SRC_BSR); | |
334 | } | |
335 | } | |
336 | ||
fdab2940 DL |
337 | if (!bsm_rpinfos_count(bsgrp_node->bsrp_list) |
338 | && !bsm_rpinfos_count(bsgrp_node->partial_bsrp_list)) { | |
c295e391 | 339 | pim_free_bsgrp_node(pim->global_scope.bsrp_table, |
340 | &bsgrp_node->group); | |
341 | pim_free_bsgrp_data(bsgrp_node); | |
342 | } | |
a5164e97 | 343 | } |
344 | ||
345 | static void pim_g2rp_timer_start(struct bsm_rpinfo *bsrp, int hold_time) | |
346 | { | |
347 | if (!bsrp) { | |
348 | if (PIM_DEBUG_BSM) | |
15569c58 | 349 | zlog_debug("%s : Invalid brsp(NULL).", __func__); |
a5164e97 | 350 | return; |
351 | } | |
352 | THREAD_OFF(bsrp->g2rp_timer); | |
2dbe669b | 353 | if (PIM_DEBUG_BSM) |
a5164e97 | 354 | zlog_debug( |
ee2bbf7c | 355 | "%s : starting g2rp timer for grp: %pFX - rp: %pI4 with timeout %d secs(Actual Hold time : %d secs)", |
2dbe669b | 356 | __func__, &bsrp->bsgrp_node->group, |
ee2bbf7c | 357 | &bsrp->rp_address, hold_time, |
a5164e97 | 358 | bsrp->rp_holdtime); |
a5164e97 | 359 | |
360 | thread_add_timer(router->master, pim_on_g2rp_timer, bsrp, hold_time, | |
361 | &bsrp->g2rp_timer); | |
362 | } | |
363 | ||
364 | static inline void pim_g2rp_timer_restart(struct bsm_rpinfo *bsrp, | |
365 | int hold_time) | |
366 | { | |
367 | pim_g2rp_timer_start(bsrp, hold_time); | |
368 | } | |
369 | ||
20fd30e5 | 370 | static void pim_g2rp_timer_stop(struct bsm_rpinfo *bsrp) |
371 | { | |
372 | if (!bsrp) | |
373 | return; | |
374 | ||
2dbe669b | 375 | if (PIM_DEBUG_BSM) |
ee2bbf7c | 376 | zlog_debug("%s : stopping g2rp timer for grp: %pFX - rp: %pI4", |
2dbe669b | 377 | __func__, &bsrp->bsgrp_node->group, |
ee2bbf7c | 378 | &bsrp->rp_address); |
20fd30e5 | 379 | |
380 | THREAD_OFF(bsrp->g2rp_timer); | |
381 | } | |
382 | ||
383 | static bool is_hold_time_zero(void *data) | |
384 | { | |
385 | struct bsm_rpinfo *bsrp; | |
386 | ||
387 | bsrp = data; | |
388 | ||
389 | if (bsrp->rp_holdtime) | |
390 | return false; | |
391 | else | |
392 | return true; | |
393 | } | |
394 | ||
395 | static void pim_instate_pend_list(struct bsgrp_node *bsgrp_node) | |
396 | { | |
397 | struct bsm_rpinfo *active; | |
398 | struct bsm_rpinfo *pend; | |
20fd30e5 | 399 | struct rp_info *rp_info; |
400 | struct route_node *rn; | |
401 | struct pim_instance *pim; | |
402 | struct rp_info *rp_all; | |
403 | struct prefix group_all; | |
404 | bool had_rp_node = true; | |
405 | ||
406 | pim = bsgrp_node->scope->pim; | |
fdab2940 | 407 | active = bsm_rpinfos_first(bsgrp_node->bsrp_list); |
20fd30e5 | 408 | |
409 | /* Remove nodes with hold time 0 & check if list still has a head */ | |
5f1808ac DS |
410 | frr_each_safe (bsm_rpinfos, bsgrp_node->partial_bsrp_list, pend) { |
411 | if (is_hold_time_zero(pend)) { | |
fdab2940 | 412 | bsm_rpinfos_del(bsgrp_node->partial_bsrp_list, pend); |
5f1808ac DS |
413 | pim_bsm_rpinfo_free(pend); |
414 | } | |
415 | } | |
fdab2940 DL |
416 | |
417 | pend = bsm_rpinfos_first(bsgrp_node->partial_bsrp_list); | |
20fd30e5 | 418 | |
419 | if (!str2prefix("224.0.0.0/4", &group_all)) | |
420 | return; | |
421 | ||
422 | rp_all = pim_rp_find_match_group(pim, &group_all); | |
423 | rn = route_node_lookup(pim->rp_table, &bsgrp_node->group); | |
424 | ||
425 | if (pend) | |
426 | pim_g2rp_timer_start(pend, pend->rp_holdtime); | |
427 | ||
428 | /* if rp node doesn't exist or exist but not configured(rp_all), | |
429 | * install the rp from head(if exists) of partial list. List is | |
430 | * is sorted such that head is the elected RP for the group. | |
431 | */ | |
cc144e8b | 432 | if (!rn || (prefix_same(&rp_all->group, &bsgrp_node->group) && |
433 | pim_rpf_addr_is_inaddr_any(&rp_all->rp))) { | |
20fd30e5 | 434 | if (PIM_DEBUG_BSM) |
15569c58 | 435 | zlog_debug("%s: Route node doesn't exist", __func__); |
20fd30e5 | 436 | if (pend) |
437 | pim_rp_new(pim, pend->rp_address, bsgrp_node->group, | |
438 | NULL, RP_SRC_BSR); | |
439 | had_rp_node = false; | |
440 | } else { | |
441 | rp_info = (struct rp_info *)rn->info; | |
442 | if (!rp_info) { | |
443 | route_unlock_node(rn); | |
444 | if (pend) | |
445 | pim_rp_new(pim, pend->rp_address, | |
446 | bsgrp_node->group, NULL, RP_SRC_BSR); | |
447 | had_rp_node = false; | |
448 | } | |
449 | } | |
450 | ||
451 | /* We didn't have rp node and pending list is empty(unlikely), cleanup*/ | |
452 | if ((!had_rp_node) && (!pend)) { | |
453 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, | |
454 | &bsgrp_node->group); | |
455 | pim_free_bsgrp_data(bsgrp_node); | |
456 | return; | |
457 | } | |
458 | ||
459 | if ((had_rp_node) && (rp_info->rp_src != RP_SRC_STATIC)) { | |
460 | /* This means we searched and got rp node, needs unlock */ | |
461 | route_unlock_node(rn); | |
462 | ||
463 | if (active && pend) { | |
464 | if ((active->rp_address.s_addr | |
465 | != pend->rp_address.s_addr)) | |
466 | pim_rp_change(pim, pend->rp_address, | |
467 | bsgrp_node->group, RP_SRC_BSR); | |
468 | } | |
469 | ||
470 | /* Possible when the first BSM has group with 0 rp count */ | |
471 | if ((!active) && (!pend)) { | |
472 | if (PIM_DEBUG_BSM) { | |
473 | zlog_debug( | |
474 | "%s: Both bsrp and partial list are empty", | |
15569c58 | 475 | __func__); |
20fd30e5 | 476 | } |
477 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, | |
478 | &bsgrp_node->group); | |
479 | pim_free_bsgrp_data(bsgrp_node); | |
480 | return; | |
481 | } | |
482 | ||
483 | /* Possible when a group with 0 rp count received in BSM */ | |
484 | if ((active) && (!pend)) { | |
485 | pim_rp_del(pim, active->rp_address, bsgrp_node->group, | |
486 | NULL, RP_SRC_BSR); | |
487 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, | |
488 | &bsgrp_node->group); | |
489 | if (PIM_DEBUG_BSM) { | |
490 | zlog_debug("%s:Pend List is null,del grp node", | |
15569c58 | 491 | __func__); |
20fd30e5 | 492 | } |
493 | pim_free_bsgrp_data(bsgrp_node); | |
494 | return; | |
495 | } | |
496 | } | |
497 | ||
498 | if ((had_rp_node) && (rp_info->rp_src == RP_SRC_STATIC)) { | |
499 | /* We need to unlock rn this case */ | |
500 | route_unlock_node(rn); | |
501 | /* there is a chance that static rp exist and bsrp cleaned | |
502 | * so clean bsgrp node if pending list empty | |
503 | */ | |
504 | if (!pend) { | |
505 | if (PIM_DEBUG_BSM) | |
506 | zlog_debug( | |
507 | "%s: Partial list is empty, static rp exists", | |
15569c58 | 508 | __func__); |
20fd30e5 | 509 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, |
510 | &bsgrp_node->group); | |
511 | pim_free_bsgrp_data(bsgrp_node); | |
512 | return; | |
513 | } | |
514 | } | |
515 | ||
516 | /* swap the list & delete all nodes in partial list (old bsrp_list) | |
517 | * before swap | |
518 | * active is head of bsrp list | |
519 | * pend is head of partial list | |
520 | * After swap | |
521 | * active is head of partial list | |
522 | * pend is head of bsrp list | |
523 | * So check appriate head after swap and clean the new partial list | |
524 | */ | |
fdab2940 DL |
525 | bsm_rpinfos_swap_all(bsgrp_node->bsrp_list, |
526 | bsgrp_node->partial_bsrp_list); | |
20fd30e5 | 527 | |
fdab2940 | 528 | if (active) |
20fd30e5 | 529 | pim_g2rp_timer_stop(active); |
fdab2940 | 530 | pim_bsm_rpinfos_free(bsgrp_node->partial_bsrp_list); |
20fd30e5 | 531 | } |
532 | ||
5acde1cf | 533 | static bool is_preferred_bsr(struct pim_instance *pim, struct in_addr bsr, |
534 | uint32_t bsr_prio) | |
535 | { | |
536 | if (bsr.s_addr == pim->global_scope.current_bsr.s_addr) | |
537 | return true; | |
538 | ||
539 | if (bsr_prio > pim->global_scope.current_bsr_prio) | |
540 | return true; | |
541 | ||
542 | else if (bsr_prio == pim->global_scope.current_bsr_prio) { | |
e34c4619 | 543 | if (ntohl(bsr.s_addr) |
544 | >= ntohl(pim->global_scope.current_bsr.s_addr)) | |
5acde1cf | 545 | return true; |
546 | else | |
547 | return false; | |
548 | } else | |
549 | return false; | |
550 | } | |
551 | ||
552 | static void pim_bsm_update(struct pim_instance *pim, struct in_addr bsr, | |
553 | uint32_t bsr_prio) | |
554 | { | |
5acde1cf | 555 | if (bsr.s_addr != pim->global_scope.current_bsr.s_addr) { |
5f010b12 | 556 | pim_nht_bsr_del(pim, pim->global_scope.current_bsr); |
4efdb9c6 | 557 | pim_nht_bsr_add(pim, bsr); |
5acde1cf | 558 | |
5acde1cf | 559 | pim->global_scope.current_bsr = bsr; |
560 | pim->global_scope.current_bsr_first_ts = | |
561 | pim_time_monotonic_sec(); | |
562 | pim->global_scope.state = ACCEPT_PREFERRED; | |
563 | } | |
564 | pim->global_scope.current_bsr_prio = bsr_prio; | |
565 | pim->global_scope.current_bsr_last_ts = pim_time_monotonic_sec(); | |
566 | } | |
567 | ||
b09bd804 DL |
568 | void pim_bsm_clear(struct pim_instance *pim) |
569 | { | |
570 | struct route_node *rn; | |
571 | struct route_node *rpnode; | |
572 | struct bsgrp_node *bsgrp; | |
573 | struct prefix nht_p; | |
574 | struct prefix g_all; | |
575 | struct rp_info *rp_all; | |
576 | struct pim_upstream *up; | |
577 | struct rp_info *rp_info; | |
62596d9a | 578 | bool upstream_updated = false; |
b09bd804 | 579 | |
5f010b12 | 580 | pim_nht_bsr_del(pim, pim->global_scope.current_bsr); |
b09bd804 DL |
581 | |
582 | /* Reset scope zone data */ | |
583 | pim->global_scope.accept_nofwd_bsm = false; | |
584 | pim->global_scope.state = ACCEPT_ANY; | |
585 | pim->global_scope.current_bsr.s_addr = INADDR_ANY; | |
586 | pim->global_scope.current_bsr_prio = 0; | |
587 | pim->global_scope.current_bsr_first_ts = 0; | |
588 | pim->global_scope.current_bsr_last_ts = 0; | |
589 | pim->global_scope.bsm_frag_tag = 0; | |
590 | pim_bsm_frags_free(&pim->global_scope); | |
591 | ||
592 | pim_bs_timer_stop(&pim->global_scope); | |
593 | ||
594 | for (rn = route_top(pim->global_scope.bsrp_table); rn; | |
595 | rn = route_next(rn)) { | |
596 | bsgrp = rn->info; | |
597 | if (!bsgrp) | |
598 | continue; | |
599 | ||
600 | rpnode = route_node_lookup(pim->rp_table, &bsgrp->group); | |
601 | ||
602 | if (!rpnode) { | |
603 | pim_free_bsgrp_node(bsgrp->scope->bsrp_table, | |
604 | &bsgrp->group); | |
605 | pim_free_bsgrp_data(bsgrp); | |
606 | continue; | |
607 | } | |
608 | ||
609 | rp_info = (struct rp_info *)rpnode->info; | |
610 | ||
611 | if ((!rp_info) || (rp_info->rp_src != RP_SRC_BSR)) { | |
612 | pim_free_bsgrp_node(bsgrp->scope->bsrp_table, | |
613 | &bsgrp->group); | |
614 | pim_free_bsgrp_data(bsgrp); | |
615 | continue; | |
616 | } | |
617 | ||
618 | /* Deregister addr with Zebra NHT */ | |
619 | nht_p.family = AF_INET; | |
620 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
621 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
622 | ||
623 | if (PIM_DEBUG_PIM_NHT_RP) { | |
624 | zlog_debug("%s: Deregister RP addr %pFX with Zebra ", | |
625 | __func__, &nht_p); | |
626 | } | |
627 | ||
628 | pim_delete_tracked_nexthop(pim, &nht_p, NULL, rp_info); | |
629 | ||
630 | if (!str2prefix("224.0.0.0/4", &g_all)) | |
631 | return; | |
632 | ||
633 | rp_all = pim_rp_find_match_group(pim, &g_all); | |
634 | ||
635 | if (rp_all == rp_info) { | |
cc144e8b | 636 | pim_addr_to_prefix(&rp_all->rp.rpf_addr, PIMADDR_ANY); |
b09bd804 DL |
637 | rp_all->i_am_rp = 0; |
638 | } else { | |
639 | /* Delete the rp_info from rp-list */ | |
640 | listnode_delete(pim->rp_list, rp_info); | |
641 | ||
642 | /* Delete the rp node from rp_table */ | |
643 | rpnode->info = NULL; | |
644 | route_unlock_node(rpnode); | |
645 | route_unlock_node(rpnode); | |
646 | XFREE(MTYPE_PIM_RP, rp_info); | |
647 | } | |
648 | ||
649 | pim_free_bsgrp_node(bsgrp->scope->bsrp_table, &bsgrp->group); | |
650 | pim_free_bsgrp_data(bsgrp); | |
651 | } | |
652 | pim_rp_refresh_group_to_rp_mapping(pim); | |
653 | ||
654 | ||
655 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { | |
656 | /* Find the upstream (*, G) whose upstream address is same as | |
657 | * the RP | |
658 | */ | |
2a27f13b | 659 | if (!pim_addr_is_any(up->sg.src)) |
b09bd804 DL |
660 | continue; |
661 | ||
662 | struct prefix grp; | |
663 | struct rp_info *trp_info; | |
664 | ||
c631920c | 665 | pim_addr_to_prefix(&grp, up->sg.grp); |
b09bd804 DL |
666 | trp_info = pim_rp_find_match_group(pim, &grp); |
667 | ||
668 | /* RP not found for the group grp */ | |
cc144e8b | 669 | if (pim_rpf_addr_is_inaddr_any(&trp_info->rp)) { |
b09bd804 DL |
670 | pim_upstream_rpf_clear(pim, up); |
671 | pim_rp_set_upstream_addr(pim, &up->upstream_addr, | |
672 | up->sg.src, up->sg.grp); | |
673 | } else { | |
674 | /* RP found for the group grp */ | |
675 | pim_upstream_update(pim, up); | |
62596d9a | 676 | upstream_updated = true; |
b09bd804 DL |
677 | } |
678 | } | |
62596d9a MR |
679 | |
680 | if (upstream_updated) | |
681 | pim_zebra_update_all_interfaces(pim); | |
b09bd804 DL |
682 | } |
683 | ||
79d97386 | 684 | static bool pim_bsm_send_intf(uint8_t *buf, int len, struct interface *ifp, |
29fd9fca | 685 | pim_addr dst_addr) |
79d97386 | 686 | { |
687 | struct pim_interface *pim_ifp; | |
688 | ||
689 | pim_ifp = ifp->info; | |
690 | ||
691 | if (!pim_ifp) { | |
692 | if (PIM_DEBUG_BSM) | |
693 | zlog_debug("%s: Pim interface not available for %s", | |
15569c58 | 694 | __func__, ifp->name); |
79d97386 | 695 | return false; |
696 | } | |
697 | ||
698 | if (pim_ifp->pim_sock_fd == -1) { | |
699 | if (PIM_DEBUG_BSM) | |
700 | zlog_debug("%s: Pim sock not available for %s", | |
15569c58 | 701 | __func__, ifp->name); |
79d97386 | 702 | return false; |
703 | } | |
704 | ||
3bb29c4e DS |
705 | if (pim_msg_send(pim_ifp->pim_sock_fd, pim_ifp->primary_address, |
706 | dst_addr, buf, len, ifp->name)) { | |
707 | zlog_warn("%s: Could not send BSM message on interface: %s", | |
15569c58 | 708 | __func__, ifp->name); |
3bb29c4e DS |
709 | return false; |
710 | } | |
711 | ||
79d97386 | 712 | pim_ifp->pim_ifstat_bsm_tx++; |
713 | pim_ifp->pim->bsm_sent++; | |
714 | return true; | |
715 | } | |
716 | ||
40270c35 | 717 | static bool pim_bsm_frag_send(uint8_t *buf, uint32_t len, struct interface *ifp, |
29fd9fca | 718 | uint32_t pim_mtu, pim_addr dst_addr, bool no_fwd) |
40270c35 | 719 | { |
720 | struct bsmmsg_grpinfo *grpinfo, *curgrp; | |
721 | uint8_t *firstgrp_ptr; | |
722 | uint8_t *pkt; | |
723 | uint8_t *pak_start; | |
724 | uint32_t parsed_len = 0; | |
725 | uint32_t this_pkt_rem; | |
726 | uint32_t copy_byte_count; | |
727 | uint32_t this_pkt_len; | |
728 | uint8_t total_rp_cnt; | |
729 | uint8_t this_rp_cnt; | |
730 | uint8_t frag_rp_cnt; | |
731 | uint8_t rp_fit_cnt; | |
732 | bool pak_pending = false; | |
733 | ||
734 | /* MTU passed here is PIM MTU (IP MTU less IP Hdr) */ | |
735 | if (pim_mtu < (PIM_MIN_BSM_LEN)) { | |
736 | zlog_warn( | |
f79f7a7b | 737 | "%s: mtu(pim mtu: %d) size less than minimum bootstrap len", |
15569c58 | 738 | __func__, pim_mtu); |
40270c35 | 739 | if (PIM_DEBUG_BSM) |
740 | zlog_debug( | |
f79f7a7b | 741 | "%s: mtu (pim mtu:%d) less than minimum bootstrap len", |
15569c58 | 742 | __func__, pim_mtu); |
40270c35 | 743 | return false; |
744 | } | |
745 | ||
746 | pak_start = XCALLOC(MTYPE_PIM_BSM_PKT_VAR_MEM, pim_mtu); | |
747 | ||
40270c35 | 748 | pkt = pak_start; |
749 | ||
750 | /* Fill PIM header later before sending packet to calc checksum */ | |
751 | pkt += PIM_MSG_HEADER_LEN; | |
752 | buf += PIM_MSG_HEADER_LEN; | |
753 | ||
754 | /* copy bsm header to new packet at offset of pim hdr */ | |
755 | memcpy(pkt, buf, PIM_BSM_HDR_LEN); | |
756 | pkt += PIM_BSM_HDR_LEN; | |
757 | buf += PIM_BSM_HDR_LEN; | |
758 | parsed_len += (PIM_MSG_HEADER_LEN + PIM_BSM_HDR_LEN); | |
759 | ||
760 | /* Store the position of first grp ptr, which can be reused for | |
761 | * next packet to start filling group. old bsm header and pim hdr | |
762 | * remains. So need not be filled again for next packet onwards. | |
763 | */ | |
764 | firstgrp_ptr = pkt; | |
765 | ||
766 | /* we received mtu excluding IP hdr len as param | |
767 | * now this_pkt_rem is mtu excluding | |
768 | * PIM_BSM_HDR_LEN + PIM_MSG_HEADER_LEN | |
769 | */ | |
770 | this_pkt_rem = pim_mtu - (PIM_BSM_HDR_LEN + PIM_MSG_HEADER_LEN); | |
771 | ||
772 | /* For each group till the packet length parsed */ | |
773 | while (parsed_len < len) { | |
774 | /* pkt ---> fragment's current pointer | |
775 | * buf ---> input buffer's current pointer | |
776 | * mtu ---> size of the pim packet - PIM header | |
777 | * curgrp ---> current group on the fragment | |
778 | * grpinfo ---> current group on the input buffer | |
779 | * this_pkt_rem ---> bytes remaing on the current fragment | |
780 | * rp_fit_cnt ---> num of rp for current grp that | |
781 | * fits this frag | |
782 | * total_rp_cnt ---> total rp present for the group in the buf | |
783 | * frag_rp_cnt ---> no of rp for the group to be fit in | |
784 | * the frag | |
785 | * this_rp_cnt ---> how many rp have we parsed | |
786 | */ | |
787 | grpinfo = (struct bsmmsg_grpinfo *)buf; | |
788 | memcpy(pkt, buf, PIM_BSM_GRP_LEN); | |
789 | curgrp = (struct bsmmsg_grpinfo *)pkt; | |
790 | parsed_len += PIM_BSM_GRP_LEN; | |
791 | pkt += PIM_BSM_GRP_LEN; | |
792 | buf += PIM_BSM_GRP_LEN; | |
793 | this_pkt_rem -= PIM_BSM_GRP_LEN; | |
794 | ||
795 | /* initialize rp count and total_rp_cnt before the rp loop */ | |
796 | this_rp_cnt = 0; | |
797 | total_rp_cnt = grpinfo->frag_rp_count; | |
798 | ||
799 | /* Loop till all RPs for the group parsed */ | |
800 | while (this_rp_cnt < total_rp_cnt) { | |
801 | /* All RP from a group processed here. | |
802 | * group is pointed by grpinfo. | |
803 | * At this point make sure buf pointing to a RP | |
804 | * within a group | |
805 | */ | |
806 | rp_fit_cnt = this_pkt_rem / PIM_BSM_RP_LEN; | |
807 | ||
808 | /* calculate how many rp am i going to copy in | |
809 | * this frag | |
810 | */ | |
811 | if (rp_fit_cnt > (total_rp_cnt - this_rp_cnt)) | |
812 | frag_rp_cnt = total_rp_cnt - this_rp_cnt; | |
813 | else | |
814 | frag_rp_cnt = rp_fit_cnt; | |
815 | ||
816 | /* populate the frag rp count for the current grp */ | |
817 | curgrp->frag_rp_count = frag_rp_cnt; | |
818 | copy_byte_count = frag_rp_cnt * PIM_BSM_RP_LEN; | |
819 | ||
820 | /* copy all the rp that we are fitting in this | |
821 | * frag for the grp | |
822 | */ | |
823 | memcpy(pkt, buf, copy_byte_count); | |
824 | this_rp_cnt += frag_rp_cnt; | |
825 | buf += copy_byte_count; | |
826 | pkt += copy_byte_count; | |
827 | parsed_len += copy_byte_count; | |
828 | this_pkt_rem -= copy_byte_count; | |
829 | ||
830 | /* Either we couldn't fit all rp for the group or the | |
831 | * mtu reached | |
832 | */ | |
833 | if ((this_rp_cnt < total_rp_cnt) | |
834 | || (this_pkt_rem | |
835 | < (PIM_BSM_GRP_LEN + PIM_BSM_RP_LEN))) { | |
836 | /* No space to fit in more rp, send this pkt */ | |
837 | this_pkt_len = pim_mtu - this_pkt_rem; | |
838 | pim_msg_build_header(pak_start, this_pkt_len, | |
839 | PIM_MSG_TYPE_BOOTSTRAP, | |
840 | no_fwd); | |
841 | pim_bsm_send_intf(pak_start, this_pkt_len, ifp, | |
842 | dst_addr); | |
843 | ||
844 | /* Construct next fragment. Reuse old packet */ | |
845 | pkt = firstgrp_ptr; | |
846 | this_pkt_rem = pim_mtu - (PIM_BSM_HDR_LEN | |
847 | + PIM_MSG_HEADER_LEN); | |
848 | ||
849 | /* If pkt can't accomodate next group + atleast | |
850 | * one rp, we must break out of this inner loop | |
851 | * and process next RP | |
852 | */ | |
853 | if (total_rp_cnt == this_rp_cnt) | |
854 | break; | |
855 | ||
856 | /* If some more RPs for the same group pending, | |
857 | * fill grp hdr | |
858 | */ | |
859 | memcpy(pkt, (uint8_t *)grpinfo, | |
860 | PIM_BSM_GRP_LEN); | |
861 | curgrp = (struct bsmmsg_grpinfo *)pkt; | |
862 | pkt += PIM_BSM_GRP_LEN; | |
863 | this_pkt_rem -= PIM_BSM_GRP_LEN; | |
864 | pak_pending = false; | |
865 | } else { | |
866 | /* We filled something but not yet sent out */ | |
867 | pak_pending = true; | |
868 | } | |
869 | } /* while RP count */ | |
870 | } /*while parsed len */ | |
871 | ||
872 | /* Send if we have any unsent packet */ | |
873 | if (pak_pending) { | |
874 | this_pkt_len = pim_mtu - this_pkt_rem; | |
875 | pim_msg_build_header(pak_start, this_pkt_len, | |
876 | PIM_MSG_TYPE_BOOTSTRAP, no_fwd); | |
877 | pim_bsm_send_intf(pak_start, (pim_mtu - this_pkt_rem), ifp, | |
878 | dst_addr); | |
879 | } | |
880 | XFREE(MTYPE_PIM_BSM_PKT_VAR_MEM, pak_start); | |
881 | return true; | |
882 | } | |
883 | ||
79d97386 | 884 | static void pim_bsm_fwd_whole_sz(struct pim_instance *pim, uint8_t *buf, |
885 | uint32_t len, int sz) | |
886 | { | |
887 | struct interface *ifp; | |
888 | struct pim_interface *pim_ifp; | |
29fd9fca | 889 | pim_addr dst_addr; |
79d97386 | 890 | uint32_t pim_mtu; |
2951a7a4 QY |
891 | bool no_fwd = false; |
892 | bool ret = false; | |
79d97386 | 893 | |
894 | /* For now only global scope zone is supported, so send on all | |
895 | * pim interfaces in the vrf | |
896 | */ | |
897 | dst_addr = qpim_all_pim_routers_addr; | |
898 | FOR_ALL_INTERFACES (pim->vrf, ifp) { | |
899 | pim_ifp = ifp->info; | |
900 | if ((!pim_ifp) || (!pim_ifp->bsm_enable)) | |
901 | continue; | |
9255f21e | 902 | |
903 | /* | |
904 | * RFC 5059 Sec 3.4: | |
905 | * When a Bootstrap message is forwarded, it is forwarded out | |
906 | * of every multicast-capable interface that has PIM neighbors. | |
907 | * | |
908 | * So skipping pim interfaces with no neighbors. | |
909 | */ | |
910 | if (listcount(pim_ifp->pim_neighbor_list) == 0) | |
911 | continue; | |
912 | ||
79d97386 | 913 | pim_hello_require(ifp); |
914 | pim_mtu = ifp->mtu - MAX_IP_HDR_LEN; | |
915 | if (pim_mtu < len) { | |
40270c35 | 916 | ret = pim_bsm_frag_send(buf, len, ifp, pim_mtu, |
917 | dst_addr, no_fwd); | |
918 | if (PIM_DEBUG_BSM) | |
919 | zlog_debug("%s: pim_bsm_frag_send returned %s", | |
15569c58 | 920 | __func__, ret ? "TRUE" : "FALSE"); |
79d97386 | 921 | } else { |
922 | pim_msg_build_header(buf, len, PIM_MSG_TYPE_BOOTSTRAP, | |
923 | no_fwd); | |
924 | if (!pim_bsm_send_intf(buf, len, ifp, dst_addr)) { | |
925 | if (PIM_DEBUG_BSM) | |
926 | zlog_debug( | |
2951a7a4 | 927 | "%s: pim_bsm_send_intf returned false", |
15569c58 | 928 | __func__); |
79d97386 | 929 | } |
930 | } | |
931 | } | |
932 | } | |
933 | ||
6bb2ef35 | 934 | bool pim_bsm_new_nbr_fwd(struct pim_neighbor *neigh, struct interface *ifp) |
935 | { | |
29fd9fca | 936 | pim_addr dst_addr; |
6bb2ef35 | 937 | struct pim_interface *pim_ifp; |
938 | struct bsm_scope *scope; | |
d4a4525c | 939 | struct bsm_frag *bsfrag; |
6bb2ef35 | 940 | char neigh_src_str[INET_ADDRSTRLEN]; |
941 | uint32_t pim_mtu; | |
942 | bool no_fwd = true; | |
943 | bool ret = false; | |
944 | ||
9bb93fa0 DL |
945 | if (PIM_DEBUG_BSM) |
946 | zlog_debug("%s: New neighbor %pPA seen on %s", __func__, | |
947 | &neigh->source_addr, ifp->name); | |
6bb2ef35 | 948 | |
949 | pim_ifp = ifp->info; | |
950 | ||
951 | /* DR only forwards BSM packet */ | |
034db86b | 952 | if (!pim_addr_cmp(pim_ifp->pim_dr_addr, pim_ifp->primary_address)) { |
6bb2ef35 | 953 | if (PIM_DEBUG_BSM) |
954 | zlog_debug( | |
955 | "%s: It is not DR, so don't forward BSM packet", | |
5e81f5dd | 956 | __func__); |
6bb2ef35 | 957 | } |
958 | ||
959 | if (!pim_ifp->bsm_enable) { | |
960 | if (PIM_DEBUG_BSM) | |
5e81f5dd DS |
961 | zlog_debug("%s: BSM proc not enabled on %s", __func__, |
962 | ifp->name); | |
6bb2ef35 | 963 | return ret; |
964 | } | |
965 | ||
966 | scope = &pim_ifp->pim->global_scope; | |
967 | ||
d4a4525c | 968 | if (!bsm_frags_count(scope->bsm_frags)) { |
6bb2ef35 | 969 | if (PIM_DEBUG_BSM) |
970 | zlog_debug("%s: BSM list for the scope is empty", | |
5e81f5dd | 971 | __func__); |
6bb2ef35 | 972 | return ret; |
973 | } | |
974 | ||
975 | if (!pim_ifp->ucast_bsm_accept) { | |
976 | dst_addr = qpim_all_pim_routers_addr; | |
977 | if (PIM_DEBUG_BSM) | |
5e81f5dd DS |
978 | zlog_debug("%s: Sending BSM mcast to %s", __func__, |
979 | neigh_src_str); | |
6bb2ef35 | 980 | } else { |
981 | dst_addr = neigh->source_addr; | |
982 | if (PIM_DEBUG_BSM) | |
5e81f5dd DS |
983 | zlog_debug("%s: Sending BSM ucast to %s", __func__, |
984 | neigh_src_str); | |
6bb2ef35 | 985 | } |
986 | pim_mtu = ifp->mtu - MAX_IP_HDR_LEN; | |
987 | pim_hello_require(ifp); | |
988 | ||
d4a4525c DL |
989 | frr_each (bsm_frags, scope->bsm_frags, bsfrag) { |
990 | if (pim_mtu < bsfrag->size) { | |
991 | ret = pim_bsm_frag_send(bsfrag->data, bsfrag->size, ifp, | |
992 | pim_mtu, dst_addr, no_fwd); | |
6bb2ef35 | 993 | if (!ret) { |
994 | if (PIM_DEBUG_BSM) | |
995 | zlog_debug( | |
996 | "%s: pim_bsm_frag_send failed", | |
5e81f5dd | 997 | __func__); |
6bb2ef35 | 998 | } |
999 | } else { | |
1000 | /* Pim header needs to be constructed */ | |
d4a4525c | 1001 | pim_msg_build_header(bsfrag->data, bsfrag->size, |
6bb2ef35 | 1002 | PIM_MSG_TYPE_BOOTSTRAP, no_fwd); |
d4a4525c DL |
1003 | ret = pim_bsm_send_intf(bsfrag->data, bsfrag->size, ifp, |
1004 | dst_addr); | |
6bb2ef35 | 1005 | if (!ret) { |
1006 | if (PIM_DEBUG_BSM) | |
1007 | zlog_debug( | |
1008 | "%s: pim_bsm_frag_send failed", | |
5e81f5dd | 1009 | __func__); |
6bb2ef35 | 1010 | } |
1011 | } | |
1012 | } | |
1013 | return ret; | |
1014 | } | |
1015 | ||
d0e418b4 | 1016 | struct bsgrp_node *pim_bsm_get_bsgrp_node(struct bsm_scope *scope, |
1017 | struct prefix *grp) | |
1018 | { | |
1019 | struct route_node *rn; | |
1020 | struct bsgrp_node *bsgrp; | |
1021 | ||
1022 | rn = route_node_lookup(scope->bsrp_table, grp); | |
1023 | if (!rn) { | |
1024 | if (PIM_DEBUG_BSM) | |
1025 | zlog_debug("%s: Route node doesn't exist for the group", | |
15569c58 | 1026 | __func__); |
d0e418b4 | 1027 | return NULL; |
1028 | } | |
1029 | bsgrp = rn->info; | |
1030 | route_unlock_node(rn); | |
1031 | ||
1032 | return bsgrp; | |
1033 | } | |
5acde1cf | 1034 | |
7b3e6ba1 | 1035 | static uint32_t hash_calc_on_grp_rp(struct prefix group, struct in_addr rp, |
1036 | uint8_t hashmasklen) | |
1037 | { | |
1038 | uint64_t temp; | |
1039 | uint32_t hash; | |
1040 | uint32_t grpaddr; | |
1041 | uint32_t rp_add; | |
1042 | uint32_t mask = 0xffffffff; | |
1043 | ||
1044 | /* mask to be made zero if hashmasklen is 0 because mask << 32 | |
1045 | * may not give 0. hashmasklen can be 0 to 32. | |
1046 | */ | |
1047 | if (hashmasklen == 0) | |
1048 | mask = 0; | |
1049 | ||
1050 | /* in_addr stores ip in big endian, hence network byte order | |
1051 | * convert to uint32 before processing hash | |
1052 | */ | |
1053 | grpaddr = ntohl(group.u.prefix4.s_addr); | |
1054 | /* Avoid shifting by 32 bit on a 32 bit register */ | |
1055 | if (hashmasklen) | |
1056 | grpaddr = grpaddr & ((mask << (32 - hashmasklen))); | |
1057 | else | |
1058 | grpaddr = grpaddr & mask; | |
1059 | rp_add = ntohl(rp.s_addr); | |
29f7fc87 DS |
1060 | temp = 1103515245 * ((1103515245 * (uint64_t)grpaddr + 12345) ^ rp_add) |
1061 | + 12345; | |
7b3e6ba1 | 1062 | hash = temp & (0x7fffffff); |
1063 | return hash; | |
1064 | } | |
1065 | ||
1066 | static bool pim_install_bsm_grp_rp(struct pim_instance *pim, | |
1067 | struct bsgrp_node *grpnode, | |
1068 | struct bsmmsg_rpinfo *rp) | |
1069 | { | |
1070 | struct bsm_rpinfo *bsm_rpinfo; | |
1071 | uint8_t hashMask_len = pim->global_scope.hashMasklen; | |
1072 | ||
1073 | /*memory allocation for bsm_rpinfo */ | |
fdab2940 | 1074 | bsm_rpinfo = XCALLOC(MTYPE_PIM_BSRP_INFO, sizeof(*bsm_rpinfo)); |
7b3e6ba1 | 1075 | |
7b3e6ba1 | 1076 | bsm_rpinfo->rp_prio = rp->rp_pri; |
1077 | bsm_rpinfo->rp_holdtime = rp->rp_holdtime; | |
1078 | memcpy(&bsm_rpinfo->rp_address, &rp->rpaddr.addr, | |
1079 | sizeof(struct in_addr)); | |
1080 | bsm_rpinfo->elapse_time = 0; | |
1081 | ||
1082 | /* Back pointer to the group node. */ | |
1083 | bsm_rpinfo->bsgrp_node = grpnode; | |
1084 | ||
1085 | /* update hash for this rp node */ | |
1086 | bsm_rpinfo->hash = hash_calc_on_grp_rp(grpnode->group, rp->rpaddr.addr, | |
1087 | hashMask_len); | |
fdab2940 | 1088 | if (bsm_rpinfos_add(grpnode->partial_bsrp_list, bsm_rpinfo) == NULL) { |
7b3e6ba1 | 1089 | if (PIM_DEBUG_BSM) |
1090 | zlog_debug( | |
63efca0e | 1091 | "%s, bs_rpinfo node added to the partial bs_rplist.", |
15569c58 | 1092 | __func__); |
7b3e6ba1 | 1093 | return true; |
1094 | } | |
1095 | ||
1096 | if (PIM_DEBUG_BSM) | |
63efca0e | 1097 | zlog_debug("%s: list node not added", __func__); |
7b3e6ba1 | 1098 | |
fdab2940 | 1099 | XFREE(MTYPE_PIM_BSRP_INFO, bsm_rpinfo); |
7b3e6ba1 | 1100 | return false; |
1101 | } | |
1102 | ||
1103 | static void pim_update_pending_rp_cnt(struct bsm_scope *sz, | |
1104 | struct bsgrp_node *bsgrp, | |
1105 | uint16_t bsm_frag_tag, | |
1106 | uint32_t total_rp_count) | |
1107 | { | |
1108 | if (bsgrp->pend_rp_cnt) { | |
1109 | /* received bsm is different packet , | |
1110 | * it is not same fragment. | |
1111 | */ | |
1112 | if (bsm_frag_tag != bsgrp->frag_tag) { | |
1113 | if (PIM_DEBUG_BSM) | |
1114 | zlog_debug( | |
63efca0e | 1115 | "%s,Received a new BSM ,so clear the pending bs_rpinfo list.", |
15569c58 | 1116 | __func__); |
fdab2940 | 1117 | pim_bsm_rpinfos_free(bsgrp->partial_bsrp_list); |
7b3e6ba1 | 1118 | bsgrp->pend_rp_cnt = total_rp_count; |
1119 | } | |
1120 | } else | |
1121 | bsgrp->pend_rp_cnt = total_rp_count; | |
1122 | ||
1123 | bsgrp->frag_tag = bsm_frag_tag; | |
1124 | } | |
1125 | ||
1126 | /* Parsing BSR packet and adding to partial list of corresponding bsgrp node */ | |
1127 | static bool pim_bsm_parse_install_g2rp(struct bsm_scope *scope, uint8_t *buf, | |
1128 | int buflen, uint16_t bsm_frag_tag) | |
1129 | { | |
1130 | struct bsmmsg_grpinfo grpinfo; | |
1131 | struct bsmmsg_rpinfo rpinfo; | |
1132 | struct prefix group; | |
1133 | struct bsgrp_node *bsgrp = NULL; | |
1134 | int frag_rp_cnt = 0; | |
1135 | int offset = 0; | |
1136 | int ins_count = 0; | |
1137 | ||
1138 | while (buflen > offset) { | |
b1945363 DS |
1139 | if (offset + (int)sizeof(struct bsmmsg_grpinfo) > buflen) { |
1140 | if (PIM_DEBUG_BSM) | |
1141 | zlog_debug( | |
1142 | "%s: buflen received %d is less than the internal data structure of the packet would suggest", | |
15569c58 | 1143 | __func__, buflen); |
b1945363 DS |
1144 | return false; |
1145 | } | |
7b3e6ba1 | 1146 | /* Extract Group tlv from BSM */ |
1147 | memcpy(&grpinfo, buf, sizeof(struct bsmmsg_grpinfo)); | |
1148 | ||
1149 | if (PIM_DEBUG_BSM) { | |
1150 | char grp_str[INET_ADDRSTRLEN]; | |
1151 | ||
1152 | pim_inet4_dump("<Group?>", grpinfo.group.addr, grp_str, | |
1153 | sizeof(grp_str)); | |
1154 | zlog_debug( | |
63efca0e | 1155 | "%s, Group %s Rpcount:%d Fragment-Rp-count:%d", |
15569c58 | 1156 | __func__, grp_str, grpinfo.rp_count, |
7b3e6ba1 | 1157 | grpinfo.frag_rp_count); |
1158 | } | |
1159 | ||
1160 | buf += sizeof(struct bsmmsg_grpinfo); | |
1161 | offset += sizeof(struct bsmmsg_grpinfo); | |
1162 | ||
7b3e6ba1 | 1163 | group.family = AF_INET; |
b1945363 DS |
1164 | if (grpinfo.group.mask > IPV4_MAX_BITLEN) { |
1165 | if (PIM_DEBUG_BSM) | |
15569c58 DA |
1166 | zlog_debug( |
1167 | "%s, v4 prefix length specified: %d is too long", | |
1168 | __func__, grpinfo.group.mask); | |
b1945363 DS |
1169 | return false; |
1170 | } | |
7b3e6ba1 | 1171 | group.prefixlen = grpinfo.group.mask; |
1172 | group.u.prefix4.s_addr = grpinfo.group.addr.s_addr; | |
1173 | ||
1174 | /* Get the Group node for the BSM rp table */ | |
1175 | bsgrp = pim_bsm_get_bsgrp_node(scope, &group); | |
1176 | ||
43038bd5 DL |
1177 | if (grpinfo.rp_count == 0) { |
1178 | struct bsm_rpinfo *old_rpinfo; | |
1179 | ||
1180 | /* BSR explicitly no longer has RPs for this group */ | |
1181 | if (!bsgrp) | |
1182 | continue; | |
1183 | ||
1184 | if (PIM_DEBUG_BSM) { | |
1185 | char grp_str[INET_ADDRSTRLEN]; | |
1186 | ||
1187 | pim_inet4_dump("<Group?>", grpinfo.group.addr, | |
1188 | grp_str, sizeof(grp_str)); | |
1189 | zlog_debug("%s, Rp count is zero for group: %s", | |
1190 | __func__, grp_str); | |
1191 | } | |
1192 | ||
1193 | old_rpinfo = bsm_rpinfos_first(bsgrp->bsrp_list); | |
1194 | if (old_rpinfo) | |
1195 | pim_rp_del(scope->pim, old_rpinfo->rp_address, | |
1196 | group, NULL, RP_SRC_BSR); | |
1197 | ||
1198 | pim_free_bsgrp_node(scope->bsrp_table, &bsgrp->group); | |
1199 | pim_free_bsgrp_data(bsgrp); | |
1200 | continue; | |
1201 | } | |
1202 | ||
7b3e6ba1 | 1203 | if (!bsgrp) { |
1204 | if (PIM_DEBUG_BSM) | |
63efca0e DL |
1205 | zlog_debug("%s, Create new BSM Group node.", |
1206 | __func__); | |
7b3e6ba1 | 1207 | |
1208 | /* create a new node to be added to the tree. */ | |
1209 | bsgrp = pim_bsm_new_bsgrp_node(scope->bsrp_table, | |
1210 | &group); | |
1211 | ||
1212 | if (!bsgrp) { | |
1213 | zlog_debug( | |
63efca0e | 1214 | "%s, Failed to get the BSM group node.", |
15569c58 | 1215 | __func__); |
7b3e6ba1 | 1216 | continue; |
1217 | } | |
1218 | ||
1219 | bsgrp->scope = scope; | |
1220 | } | |
1221 | ||
1222 | pim_update_pending_rp_cnt(scope, bsgrp, bsm_frag_tag, | |
1223 | grpinfo.rp_count); | |
1224 | frag_rp_cnt = grpinfo.frag_rp_count; | |
1225 | ins_count = 0; | |
1226 | ||
1227 | while (frag_rp_cnt--) { | |
b1945363 DS |
1228 | if (offset + (int)sizeof(struct bsmmsg_rpinfo) |
1229 | > buflen) { | |
1230 | if (PIM_DEBUG_BSM) | |
1231 | zlog_debug( | |
1232 | "%s, buflen received: %u is less than the internal data structure of the packet would suggest", | |
15569c58 | 1233 | __func__, buflen); |
b1945363 DS |
1234 | return false; |
1235 | } | |
1236 | ||
7b3e6ba1 | 1237 | /* Extract RP address tlv from BSM */ |
1238 | memcpy(&rpinfo, buf, sizeof(struct bsmmsg_rpinfo)); | |
1239 | rpinfo.rp_holdtime = ntohs(rpinfo.rp_holdtime); | |
1240 | buf += sizeof(struct bsmmsg_rpinfo); | |
1241 | offset += sizeof(struct bsmmsg_rpinfo); | |
1242 | ||
1243 | if (PIM_DEBUG_BSM) { | |
1244 | char rp_str[INET_ADDRSTRLEN]; | |
1245 | ||
1246 | pim_inet4_dump("<Rpaddr?>", rpinfo.rpaddr.addr, | |
1247 | rp_str, sizeof(rp_str)); | |
1248 | zlog_debug( | |
63efca0e | 1249 | "%s, Rp address - %s; pri:%d hold:%d", |
15569c58 DA |
1250 | __func__, rp_str, rpinfo.rp_pri, |
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 | ||
5acde1cf | 1273 | int pim_bsm_process(struct interface *ifp, struct ip *ip_hdr, uint8_t *buf, |
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; |
1282 | char bsr_str[INET_ADDRSTRLEN]; | |
1283 | uint16_t frag_tag; | |
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 | ||
1295 | pim_ifp->pim_ifstat_bsm_rx++; | |
1296 | pim = pim_ifp->pim; | |
1297 | pim->bsm_rcvd++; | |
1298 | ||
1299 | /* Drop if bsm processing is disabled on interface */ | |
1300 | if (!pim_ifp->bsm_enable) { | |
15569c58 DA |
1301 | zlog_warn("%s: BSM not enabled on interface %s", __func__, |
1302 | ifp->name); | |
5acde1cf | 1303 | pim_ifp->pim_ifstat_bsm_cfg_miss++; |
1304 | pim->bsm_dropped++; | |
1305 | return -1; | |
1306 | } | |
1307 | ||
d83a854b | 1308 | if (buf_size < (PIM_MSG_HEADER_LEN + sizeof(struct bsm_hdr))) { |
b1945363 | 1309 | if (PIM_DEBUG_BSM) |
15569c58 DA |
1310 | zlog_debug( |
1311 | "%s: received buffer length of %d which is too small to properly decode", | |
1312 | __func__, buf_size); | |
b1945363 DS |
1313 | return -1; |
1314 | } | |
1315 | ||
5acde1cf | 1316 | bshdr = (struct bsm_hdr *)(buf + PIM_MSG_HEADER_LEN); |
1317 | pim_inet4_dump("<bsr?>", bshdr->bsr_addr.addr, bsr_str, | |
1318 | sizeof(bsr_str)); | |
12256b84 | 1319 | if (bshdr->hm_len > IPV4_MAX_BITLEN) { |
6cde4b45 | 1320 | zlog_warn("Bad hashmask length for IPv4; got %hhu, expected value in range 0-32", |
817f8933 QY |
1321 | bshdr->hm_len); |
1322 | pim->bsm_dropped++; | |
1323 | return -1; | |
1324 | } | |
5acde1cf | 1325 | pim->global_scope.hashMasklen = bshdr->hm_len; |
1326 | frag_tag = ntohs(bshdr->frag_tag); | |
1327 | ||
1328 | /* Identify empty BSM */ | |
1329 | if ((buf_size - PIM_BSM_HDR_LEN - PIM_MSG_HEADER_LEN) < PIM_BSM_GRP_LEN) | |
1330 | empty_bsm = true; | |
1331 | ||
1332 | if (!empty_bsm) { | |
1333 | msg_grp = (struct bsmmsg_grpinfo *)(buf + PIM_MSG_HEADER_LEN | |
1334 | + PIM_BSM_HDR_LEN); | |
1335 | /* Currently we don't support scope zoned BSM */ | |
1336 | if (msg_grp->group.sz) { | |
1337 | if (PIM_DEBUG_BSM) | |
1338 | zlog_debug( | |
1339 | "%s : Administratively scoped range BSM received", | |
15569c58 | 1340 | __func__); |
5acde1cf | 1341 | pim_ifp->pim_ifstat_bsm_invalid_sz++; |
1342 | pim->bsm_dropped++; | |
1343 | return -1; | |
1344 | } | |
1345 | } | |
1346 | ||
1347 | /* Drop if bsr is not preferred bsr */ | |
1348 | if (!is_preferred_bsr(pim, bshdr->bsr_addr.addr, bshdr->bsr_prio)) { | |
1349 | if (PIM_DEBUG_BSM) | |
1350 | zlog_debug("%s : Received a non-preferred BSM", | |
15569c58 | 1351 | __func__); |
5acde1cf | 1352 | pim->bsm_dropped++; |
1353 | return -1; | |
1354 | } | |
1355 | ||
1356 | if (no_fwd) { | |
1357 | /* only accept no-forward BSM if quick refresh on startup */ | |
1358 | if ((pim->global_scope.accept_nofwd_bsm) | |
1359 | || (frag_tag == pim->global_scope.bsm_frag_tag)) { | |
1360 | pim->global_scope.accept_nofwd_bsm = false; | |
1361 | } else { | |
1362 | if (PIM_DEBUG_BSM) | |
1363 | zlog_debug( | |
1364 | "%s : nofwd_bsm received on %s when accpt_nofwd_bsm false", | |
15569c58 | 1365 | __func__, bsr_str); |
5acde1cf | 1366 | pim->bsm_dropped++; |
1367 | pim_ifp->pim_ifstat_ucast_bsm_cfg_miss++; | |
1368 | return -1; | |
1369 | } | |
1370 | } | |
1371 | ||
809c11a9 DL |
1372 | #if PIM_IPV == 4 |
1373 | if (ip_hdr->ip_dst.s_addr == qpim_all_pim_routers_addr.s_addr) | |
1374 | #else | |
1375 | if (0) | |
1376 | #endif | |
1377 | { | |
4efdb9c6 DL |
1378 | /* Multicast BSMs are only accepted if source interface & IP |
1379 | * match RPF towards the BSR's IP address, or they have | |
1380 | * no-forward set | |
1381 | */ | |
1382 | if (!no_fwd | |
1383 | && !pim_nht_bsr_rpf_check(pim, bshdr->bsr_addr.addr, ifp, | |
1384 | ip_hdr->ip_src)) { | |
1385 | if (PIM_DEBUG_BSM) | |
1386 | zlog_debug( | |
1387 | "BSM check: RPF to BSR %s is not %pI4%%%s", | |
1388 | bsr_str, &ip_hdr->ip_src, ifp->name); | |
1389 | pim->bsm_dropped++; | |
1390 | return -1; | |
5acde1cf | 1391 | } |
1e9044be DL |
1392 | } else if (if_address_is_local(&ip_hdr->ip_dst, AF_INET, |
1393 | pim->vrf->vrf_id)) { | |
5acde1cf | 1394 | /* Unicast BSM received - if ucast bsm not enabled on |
1395 | * the interface, drop it | |
1396 | */ | |
1397 | if (!pim_ifp->ucast_bsm_accept) { | |
1398 | if (PIM_DEBUG_BSM) | |
1399 | zlog_debug( | |
1400 | "%s : Unicast BSM not enabled on interface %s", | |
15569c58 | 1401 | __func__, ifp->name); |
5acde1cf | 1402 | pim_ifp->pim_ifstat_ucast_bsm_cfg_miss++; |
1403 | pim->bsm_dropped++; | |
1404 | return -1; | |
1405 | } | |
1406 | ||
1407 | } else { | |
1408 | if (PIM_DEBUG_BSM) | |
1409 | zlog_debug("%s : Invalid destination address", | |
15569c58 | 1410 | __func__); |
5acde1cf | 1411 | pim->bsm_dropped++; |
1412 | return -1; | |
1413 | } | |
1414 | ||
1415 | if (empty_bsm) { | |
1416 | if (PIM_DEBUG_BSM) | |
15569c58 | 1417 | zlog_debug("%s : Empty Pref BSM received", __func__); |
5acde1cf | 1418 | } |
7b3e6ba1 | 1419 | /* Parse Update bsm rp table and install/uninstall rp if required */ |
1420 | if (!pim_bsm_parse_install_g2rp( | |
1421 | &pim_ifp->pim->global_scope, | |
1422 | (buf + PIM_BSM_HDR_LEN + PIM_MSG_HEADER_LEN), | |
1423 | (buf_size - PIM_BSM_HDR_LEN - PIM_MSG_HEADER_LEN), | |
1424 | frag_tag)) { | |
1425 | if (PIM_DEBUG_BSM) { | |
63efca0e | 1426 | zlog_debug("%s, Parsing BSM failed.", __func__); |
7b3e6ba1 | 1427 | } |
1428 | pim->bsm_dropped++; | |
1429 | return -1; | |
1430 | } | |
5acde1cf | 1431 | /* Restart the bootstrap timer */ |
1432 | pim_bs_timer_restart(&pim_ifp->pim->global_scope, | |
1433 | PIM_BSR_DEFAULT_TIMEOUT); | |
1434 | ||
1435 | /* If new BSM received, clear the old bsm database */ | |
1436 | if (pim_ifp->pim->global_scope.bsm_frag_tag != frag_tag) { | |
1437 | if (PIM_DEBUG_BSM) { | |
1438 | zlog_debug("%s: Current frag tag: %d Frag teg rcvd: %d", | |
15569c58 | 1439 | __func__, |
5acde1cf | 1440 | pim_ifp->pim->global_scope.bsm_frag_tag, |
1441 | frag_tag); | |
1442 | } | |
d4a4525c | 1443 | pim_bsm_frags_free(&pim_ifp->pim->global_scope); |
5acde1cf | 1444 | pim_ifp->pim->global_scope.bsm_frag_tag = frag_tag; |
1445 | } | |
1446 | ||
1447 | /* update the scope information from bsm */ | |
1448 | pim_bsm_update(pim, bshdr->bsr_addr.addr, bshdr->bsr_prio); | |
79d97386 | 1449 | |
1450 | if (!no_fwd) { | |
1451 | pim_bsm_fwd_whole_sz(pim_ifp->pim, buf, buf_size, sz); | |
d4a4525c DL |
1452 | bsfrag = XCALLOC(MTYPE_PIM_BSM_FRAG, |
1453 | sizeof(struct bsm_frag) + buf_size); | |
79d97386 | 1454 | |
d4a4525c DL |
1455 | bsfrag->size = buf_size; |
1456 | memcpy(bsfrag->data, buf, buf_size); | |
1457 | bsm_frags_add_tail(pim_ifp->pim->global_scope.bsm_frags, | |
1458 | bsfrag); | |
79d97386 | 1459 | } |
1460 | ||
5acde1cf | 1461 | return 0; |
1462 | } |