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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
361b5843 | 2 | /* |
3 | * pim_bsm.c: PIM BSM handling routines | |
4 | * | |
5 | * Copyright (C) 2018-19 Vmware, Inc. | |
6 | * Saravanan K | |
361b5843 | 7 | */ |
2618a52e DL |
8 | |
9 | #ifdef HAVE_CONFIG_H | |
10 | #include "config.h" | |
11 | #endif | |
12 | ||
361b5843 | 13 | #include "if.h" |
14 | #include "pimd.h" | |
15 | #include "pim_iface.h" | |
361b5843 | 16 | #include "pim_instance.h" |
e34e07e6 | 17 | #include "pim_neighbor.h" |
361b5843 | 18 | #include "pim_rpf.h" |
19 | #include "pim_hello.h" | |
20 | #include "pim_pim.h" | |
21 | #include "pim_nht.h" | |
22 | #include "pim_bsm.h" | |
23 | #include "pim_time.h" | |
62596d9a | 24 | #include "pim_zebra.h" |
c6ced474 | 25 | #include "pim_util.h" |
361b5843 | 26 | |
27 | /* Functions forward declaration */ | |
28 | static void pim_bs_timer_start(struct bsm_scope *scope, int bs_timeout); | |
a5164e97 | 29 | static void pim_g2rp_timer_start(struct bsm_rpinfo *bsrp, int hold_time); |
30 | static inline void pim_g2rp_timer_restart(struct bsm_rpinfo *bsrp, | |
31 | int hold_time); | |
23255dfd | 32 | |
33 | /* Memory Types */ | |
bf8d3d6a | 34 | DEFINE_MTYPE_STATIC(PIMD, PIM_BSGRP_NODE, "PIM BSR advertised grp info"); |
fdab2940 | 35 | DEFINE_MTYPE_STATIC(PIMD, PIM_BSRP_INFO, "PIM BSR advertised RP info"); |
d4a4525c | 36 | DEFINE_MTYPE_STATIC(PIMD, PIM_BSM_FRAG, "PIM BSM fragment"); |
bf8d3d6a | 37 | DEFINE_MTYPE_STATIC(PIMD, PIM_BSM_PKT_VAR_MEM, "PIM BSM Packet"); |
361b5843 | 38 | |
79d97386 | 39 | /* All bsm packets forwarded shall be fit within ip mtu less iphdr(max) */ |
40 | #define MAX_IP_HDR_LEN 24 | |
41 | ||
16c926c8 | 42 | /* pim_bsm_write_config - Write the interface pim bsm configuration.*/ |
d0e418b4 | 43 | void pim_bsm_write_config(struct vty *vty, struct interface *ifp) |
16c926c8 | 44 | { |
45 | struct pim_interface *pim_ifp = ifp->info; | |
46 | ||
47 | if (pim_ifp) { | |
48 | if (!pim_ifp->bsm_enable) | |
d17b6892 | 49 | vty_out(vty, " no " PIM_AF_NAME " pim bsm\n"); |
16c926c8 | 50 | if (!pim_ifp->ucast_bsm_accept) |
d17b6892 | 51 | vty_out(vty, " no " PIM_AF_NAME " pim unicast-bsm\n"); |
16c926c8 | 52 | } |
53 | } | |
54 | ||
fdab2940 DL |
55 | static void pim_bsm_rpinfo_free(struct bsm_rpinfo *bsrp_info) |
56 | { | |
e16d030c | 57 | EVENT_OFF(bsrp_info->g2rp_timer); |
fdab2940 DL |
58 | XFREE(MTYPE_PIM_BSRP_INFO, bsrp_info); |
59 | } | |
60 | ||
b09bd804 | 61 | static void pim_bsm_rpinfos_free(struct bsm_rpinfos_head *head) |
fdab2940 DL |
62 | { |
63 | struct bsm_rpinfo *bsrp_info; | |
64 | ||
65 | while ((bsrp_info = bsm_rpinfos_pop(head))) | |
66 | pim_bsm_rpinfo_free(bsrp_info); | |
67 | } | |
68 | ||
b09bd804 | 69 | static void pim_free_bsgrp_data(struct bsgrp_node *bsgrp_node) |
361b5843 | 70 | { |
fdab2940 DL |
71 | pim_bsm_rpinfos_free(bsgrp_node->bsrp_list); |
72 | pim_bsm_rpinfos_free(bsgrp_node->partial_bsrp_list); | |
361b5843 | 73 | XFREE(MTYPE_PIM_BSGRP_NODE, bsgrp_node); |
74 | } | |
75 | ||
b09bd804 | 76 | static void pim_free_bsgrp_node(struct route_table *rt, struct prefix *grp) |
c295e391 | 77 | { |
78 | struct route_node *rn; | |
79 | ||
80 | rn = route_node_lookup(rt, grp); | |
81 | if (rn) { | |
82 | rn->info = NULL; | |
83 | route_unlock_node(rn); | |
84 | route_unlock_node(rn); | |
85 | } | |
86 | } | |
87 | ||
d4a4525c | 88 | static void pim_bsm_frag_free(struct bsm_frag *bsfrag) |
361b5843 | 89 | { |
d4a4525c DL |
90 | XFREE(MTYPE_PIM_BSM_FRAG, bsfrag); |
91 | } | |
92 | ||
b09bd804 | 93 | static void pim_bsm_frags_free(struct bsm_scope *scope) |
d4a4525c DL |
94 | { |
95 | struct bsm_frag *bsfrag; | |
96 | ||
97 | while ((bsfrag = bsm_frags_pop(scope->bsm_frags))) | |
98 | pim_bsm_frag_free(bsfrag); | |
361b5843 | 99 | } |
100 | ||
fdab2940 DL |
101 | int pim_bsm_rpinfo_cmp(const struct bsm_rpinfo *node1, |
102 | const struct bsm_rpinfo *node2) | |
7b3e6ba1 | 103 | { |
104 | /* RP election Algo : | |
105 | * Step-1 : Loweset Rp priority will have higher precedance. | |
106 | * Step-2 : If priority same then higher hash val will have | |
107 | * higher precedance. | |
108 | * Step-3 : If Hash val is same then highest rp address will | |
109 | * become elected RP. | |
110 | */ | |
111 | if (node1->rp_prio < node2->rp_prio) | |
112 | return -1; | |
113 | if (node1->rp_prio > node2->rp_prio) | |
114 | return 1; | |
115 | if (node1->hash < node2->hash) | |
116 | return 1; | |
117 | if (node1->hash > node2->hash) | |
118 | return -1; | |
1407e40f | 119 | return pim_addr_cmp(node2->rp_address, node1->rp_address); |
7b3e6ba1 | 120 | } |
121 | ||
7b3e6ba1 | 122 | static struct bsgrp_node *pim_bsm_new_bsgrp_node(struct route_table *rt, |
123 | struct prefix *grp) | |
124 | { | |
125 | struct route_node *rn; | |
126 | struct bsgrp_node *bsgrp; | |
127 | ||
128 | rn = route_node_get(rt, grp); | |
129 | if (!rn) { | |
15569c58 | 130 | zlog_warn("%s: route node creation failed", __func__); |
7b3e6ba1 | 131 | return NULL; |
132 | } | |
133 | bsgrp = XCALLOC(MTYPE_PIM_BSGRP_NODE, sizeof(struct bsgrp_node)); | |
134 | ||
7b3e6ba1 | 135 | rn->info = bsgrp; |
fdab2940 DL |
136 | bsm_rpinfos_init(bsgrp->bsrp_list); |
137 | bsm_rpinfos_init(bsgrp->partial_bsrp_list); | |
7b3e6ba1 | 138 | |
139 | prefix_copy(&bsgrp->group, grp); | |
140 | return bsgrp; | |
141 | } | |
142 | ||
e6685141 | 143 | static void pim_on_bs_timer(struct event *t) |
23255dfd | 144 | { |
c843f56d | 145 | struct route_node *rn; |
146 | struct bsm_scope *scope; | |
147 | struct bsgrp_node *bsgrp_node; | |
148 | struct bsm_rpinfo *bsrp; | |
c843f56d | 149 | |
e16d030c DS |
150 | scope = EVENT_ARG(t); |
151 | EVENT_OFF(scope->bs_timer); | |
c843f56d | 152 | |
153 | if (PIM_DEBUG_BSM) | |
154 | zlog_debug("%s: Bootstrap Timer expired for scope: %d", | |
15569c58 | 155 | __func__, scope->sz_id); |
c843f56d | 156 | |
5f010b12 | 157 | pim_nht_bsr_del(scope->pim, scope->current_bsr); |
c843f56d | 158 | /* Reset scope zone data */ |
c843f56d | 159 | scope->state = ACCEPT_ANY; |
e309769a | 160 | scope->current_bsr = PIMADDR_ANY; |
c843f56d | 161 | scope->current_bsr_prio = 0; |
162 | scope->current_bsr_first_ts = 0; | |
163 | scope->current_bsr_last_ts = 0; | |
164 | scope->bsm_frag_tag = 0; | |
d4a4525c | 165 | pim_bsm_frags_free(scope); |
c843f56d | 166 | |
167 | for (rn = route_top(scope->bsrp_table); rn; rn = route_next(rn)) { | |
168 | ||
169 | bsgrp_node = (struct bsgrp_node *)rn->info; | |
170 | if (!bsgrp_node) { | |
171 | if (PIM_DEBUG_BSM) | |
15569c58 | 172 | zlog_debug("%s: bsgrp_node is null", __func__); |
c843f56d | 173 | continue; |
174 | } | |
175 | /* Give grace time for rp to continue for another hold time */ | |
fdab2940 DL |
176 | bsrp = bsm_rpinfos_first(bsgrp_node->bsrp_list); |
177 | if (bsrp) | |
c843f56d | 178 | pim_g2rp_timer_restart(bsrp, bsrp->rp_holdtime); |
fdab2940 | 179 | |
c843f56d | 180 | /* clear pending list */ |
fdab2940 DL |
181 | pim_bsm_rpinfos_free(bsgrp_node->partial_bsrp_list); |
182 | bsgrp_node->pend_rp_cnt = 0; | |
c843f56d | 183 | } |
23255dfd | 184 | } |
185 | ||
b09bd804 | 186 | static void pim_bs_timer_stop(struct bsm_scope *scope) |
23255dfd | 187 | { |
188 | if (PIM_DEBUG_BSM) | |
15569c58 DA |
189 | zlog_debug("%s : BS timer being stopped of sz: %d", __func__, |
190 | scope->sz_id); | |
e16d030c | 191 | EVENT_OFF(scope->bs_timer); |
23255dfd | 192 | } |
193 | ||
194 | static void pim_bs_timer_start(struct bsm_scope *scope, int bs_timeout) | |
195 | { | |
196 | if (!scope) { | |
197 | if (PIM_DEBUG_BSM) | |
15569c58 | 198 | zlog_debug("%s : Invalid scope(NULL).", __func__); |
23255dfd | 199 | return; |
200 | } | |
e16d030c | 201 | EVENT_OFF(scope->bs_timer); |
23255dfd | 202 | if (PIM_DEBUG_BSM) |
15569c58 DA |
203 | zlog_debug( |
204 | "%s : starting bs timer for scope %d with timeout %d secs", | |
205 | __func__, scope->sz_id, bs_timeout); | |
907a2395 DS |
206 | event_add_timer(router->master, pim_on_bs_timer, scope, bs_timeout, |
207 | &scope->bs_timer); | |
23255dfd | 208 | } |
209 | ||
5acde1cf | 210 | static inline void pim_bs_timer_restart(struct bsm_scope *scope, int bs_timeout) |
211 | { | |
212 | pim_bs_timer_start(scope, bs_timeout); | |
213 | } | |
214 | ||
361b5843 | 215 | void pim_bsm_proc_init(struct pim_instance *pim) |
216 | { | |
217 | memset(&pim->global_scope, 0, sizeof(struct bsm_scope)); | |
218 | ||
219 | pim->global_scope.sz_id = PIM_GBL_SZ_ID; | |
220 | pim->global_scope.bsrp_table = route_table_init(); | |
221 | pim->global_scope.accept_nofwd_bsm = true; | |
222 | pim->global_scope.state = NO_INFO; | |
223 | pim->global_scope.pim = pim; | |
d4a4525c | 224 | bsm_frags_init(pim->global_scope.bsm_frags); |
361b5843 | 225 | pim_bs_timer_start(&pim->global_scope, PIM_BS_TIME); |
226 | } | |
227 | ||
228 | void pim_bsm_proc_free(struct pim_instance *pim) | |
229 | { | |
230 | struct route_node *rn; | |
231 | struct bsgrp_node *bsgrp; | |
232 | ||
233 | pim_bs_timer_stop(&pim->global_scope); | |
d4a4525c | 234 | pim_bsm_frags_free(&pim->global_scope); |
361b5843 | 235 | |
d0e418b4 | 236 | for (rn = route_top(pim->global_scope.bsrp_table); rn; |
237 | rn = route_next(rn)) { | |
361b5843 | 238 | bsgrp = rn->info; |
239 | if (!bsgrp) | |
240 | continue; | |
241 | pim_free_bsgrp_data(bsgrp); | |
242 | } | |
243 | ||
4d19a911 | 244 | route_table_finish(pim->global_scope.bsrp_table); |
361b5843 | 245 | } |
246 | ||
c295e391 | 247 | static bool is_hold_time_elapsed(void *data) |
248 | { | |
249 | struct bsm_rpinfo *bsrp; | |
250 | ||
251 | bsrp = data; | |
252 | ||
253 | if (bsrp->elapse_time < bsrp->rp_holdtime) | |
254 | return false; | |
255 | else | |
256 | return true; | |
257 | } | |
258 | ||
e6685141 | 259 | static void pim_on_g2rp_timer(struct event *t) |
a5164e97 | 260 | { |
c295e391 | 261 | struct bsm_rpinfo *bsrp; |
262 | struct bsm_rpinfo *bsrp_node; | |
263 | struct bsgrp_node *bsgrp_node; | |
c295e391 | 264 | struct pim_instance *pim; |
265 | struct rp_info *rp_info; | |
266 | struct route_node *rn; | |
267 | uint16_t elapse; | |
9dca52b9 | 268 | pim_addr bsrp_addr; |
c295e391 | 269 | |
e16d030c DS |
270 | bsrp = EVENT_ARG(t); |
271 | EVENT_OFF(bsrp->g2rp_timer); | |
c295e391 | 272 | bsgrp_node = bsrp->bsgrp_node; |
273 | ||
274 | /* elapse time is the hold time of expired node */ | |
275 | elapse = bsrp->rp_holdtime; | |
276 | bsrp_addr = bsrp->rp_address; | |
277 | ||
278 | /* update elapse for all bsrp nodes */ | |
fdab2940 | 279 | frr_each_safe (bsm_rpinfos, bsgrp_node->bsrp_list, bsrp_node) { |
c295e391 | 280 | bsrp_node->elapse_time += elapse; |
281 | ||
fdab2940 DL |
282 | if (is_hold_time_elapsed(bsrp_node)) { |
283 | bsm_rpinfos_del(bsgrp_node->bsrp_list, bsrp_node); | |
284 | pim_bsm_rpinfo_free(bsrp_node); | |
285 | } | |
286 | } | |
c295e391 | 287 | |
288 | /* Get the next elected rp node */ | |
fdab2940 | 289 | bsrp = bsm_rpinfos_first(bsgrp_node->bsrp_list); |
c295e391 | 290 | pim = bsgrp_node->scope->pim; |
291 | rn = route_node_lookup(pim->rp_table, &bsgrp_node->group); | |
292 | ||
293 | if (!rn) { | |
5e81f5dd | 294 | zlog_warn("%s: Route node doesn't exist", __func__); |
cc9f21da | 295 | return; |
c295e391 | 296 | } |
297 | ||
298 | rp_info = (struct rp_info *)rn->info; | |
299 | ||
300 | if (!rp_info) { | |
301 | route_unlock_node(rn); | |
cc9f21da | 302 | return; |
c295e391 | 303 | } |
304 | ||
305 | if (rp_info->rp_src != RP_SRC_STATIC) { | |
306 | /* If new rp available, change it else delete the existing */ | |
307 | if (bsrp) { | |
c295e391 | 308 | pim_g2rp_timer_start( |
309 | bsrp, (bsrp->rp_holdtime - bsrp->elapse_time)); | |
49b7b2c4 | 310 | pim_rp_change(pim, bsrp->rp_address, bsgrp_node->group, |
c295e391 | 311 | RP_SRC_BSR); |
312 | } else { | |
313 | pim_rp_del(pim, bsrp_addr, bsgrp_node->group, NULL, | |
314 | RP_SRC_BSR); | |
315 | } | |
316 | } | |
317 | ||
fdab2940 DL |
318 | if (!bsm_rpinfos_count(bsgrp_node->bsrp_list) |
319 | && !bsm_rpinfos_count(bsgrp_node->partial_bsrp_list)) { | |
c295e391 | 320 | pim_free_bsgrp_node(pim->global_scope.bsrp_table, |
321 | &bsgrp_node->group); | |
322 | pim_free_bsgrp_data(bsgrp_node); | |
323 | } | |
a5164e97 | 324 | } |
325 | ||
326 | static void pim_g2rp_timer_start(struct bsm_rpinfo *bsrp, int hold_time) | |
327 | { | |
328 | if (!bsrp) { | |
329 | if (PIM_DEBUG_BSM) | |
15569c58 | 330 | zlog_debug("%s : Invalid brsp(NULL).", __func__); |
a5164e97 | 331 | return; |
332 | } | |
e16d030c | 333 | EVENT_OFF(bsrp->g2rp_timer); |
2dbe669b | 334 | if (PIM_DEBUG_BSM) |
a5164e97 | 335 | zlog_debug( |
11e1593f | 336 | "%s : starting g2rp timer for grp: %pFX - rp: %pPAs with timeout %d secs(Actual Hold time : %d secs)", |
337 | __func__, &bsrp->bsgrp_node->group, &bsrp->rp_address, | |
338 | hold_time, bsrp->rp_holdtime); | |
a5164e97 | 339 | |
907a2395 DS |
340 | event_add_timer(router->master, pim_on_g2rp_timer, bsrp, hold_time, |
341 | &bsrp->g2rp_timer); | |
a5164e97 | 342 | } |
343 | ||
344 | static inline void pim_g2rp_timer_restart(struct bsm_rpinfo *bsrp, | |
345 | int hold_time) | |
346 | { | |
347 | pim_g2rp_timer_start(bsrp, hold_time); | |
348 | } | |
349 | ||
20fd30e5 | 350 | static void pim_g2rp_timer_stop(struct bsm_rpinfo *bsrp) |
351 | { | |
352 | if (!bsrp) | |
353 | return; | |
354 | ||
2dbe669b | 355 | if (PIM_DEBUG_BSM) |
11e1593f | 356 | zlog_debug("%s : stopping g2rp timer for grp: %pFX - rp: %pPAs", |
2dbe669b | 357 | __func__, &bsrp->bsgrp_node->group, |
ee2bbf7c | 358 | &bsrp->rp_address); |
20fd30e5 | 359 | |
e16d030c | 360 | EVENT_OFF(bsrp->g2rp_timer); |
20fd30e5 | 361 | } |
362 | ||
363 | static bool is_hold_time_zero(void *data) | |
364 | { | |
365 | struct bsm_rpinfo *bsrp; | |
366 | ||
367 | bsrp = data; | |
368 | ||
369 | if (bsrp->rp_holdtime) | |
370 | return false; | |
371 | else | |
372 | return true; | |
373 | } | |
374 | ||
375 | static void pim_instate_pend_list(struct bsgrp_node *bsgrp_node) | |
376 | { | |
377 | struct bsm_rpinfo *active; | |
378 | struct bsm_rpinfo *pend; | |
20fd30e5 | 379 | struct rp_info *rp_info; |
380 | struct route_node *rn; | |
381 | struct pim_instance *pim; | |
382 | struct rp_info *rp_all; | |
383 | struct prefix group_all; | |
384 | bool had_rp_node = true; | |
385 | ||
386 | pim = bsgrp_node->scope->pim; | |
fdab2940 | 387 | active = bsm_rpinfos_first(bsgrp_node->bsrp_list); |
20fd30e5 | 388 | |
389 | /* Remove nodes with hold time 0 & check if list still has a head */ | |
5f1808ac DS |
390 | frr_each_safe (bsm_rpinfos, bsgrp_node->partial_bsrp_list, pend) { |
391 | if (is_hold_time_zero(pend)) { | |
fdab2940 | 392 | bsm_rpinfos_del(bsgrp_node->partial_bsrp_list, pend); |
5f1808ac DS |
393 | pim_bsm_rpinfo_free(pend); |
394 | } | |
395 | } | |
fdab2940 DL |
396 | |
397 | pend = bsm_rpinfos_first(bsgrp_node->partial_bsrp_list); | |
20fd30e5 | 398 | |
c6ced474 | 399 | if (!pim_get_all_mcast_group(&group_all)) |
20fd30e5 | 400 | return; |
401 | ||
402 | rp_all = pim_rp_find_match_group(pim, &group_all); | |
403 | rn = route_node_lookup(pim->rp_table, &bsgrp_node->group); | |
404 | ||
405 | if (pend) | |
406 | pim_g2rp_timer_start(pend, pend->rp_holdtime); | |
407 | ||
408 | /* if rp node doesn't exist or exist but not configured(rp_all), | |
409 | * install the rp from head(if exists) of partial list. List is | |
410 | * is sorted such that head is the elected RP for the group. | |
411 | */ | |
cc144e8b | 412 | if (!rn || (prefix_same(&rp_all->group, &bsgrp_node->group) && |
413 | pim_rpf_addr_is_inaddr_any(&rp_all->rp))) { | |
20fd30e5 | 414 | if (PIM_DEBUG_BSM) |
15569c58 | 415 | zlog_debug("%s: Route node doesn't exist", __func__); |
20fd30e5 | 416 | if (pend) |
417 | pim_rp_new(pim, pend->rp_address, bsgrp_node->group, | |
418 | NULL, RP_SRC_BSR); | |
419 | had_rp_node = false; | |
420 | } else { | |
421 | rp_info = (struct rp_info *)rn->info; | |
422 | if (!rp_info) { | |
423 | route_unlock_node(rn); | |
424 | if (pend) | |
425 | pim_rp_new(pim, pend->rp_address, | |
426 | bsgrp_node->group, NULL, RP_SRC_BSR); | |
427 | had_rp_node = false; | |
428 | } | |
429 | } | |
430 | ||
431 | /* We didn't have rp node and pending list is empty(unlikely), cleanup*/ | |
432 | if ((!had_rp_node) && (!pend)) { | |
433 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, | |
434 | &bsgrp_node->group); | |
435 | pim_free_bsgrp_data(bsgrp_node); | |
436 | return; | |
437 | } | |
438 | ||
439 | if ((had_rp_node) && (rp_info->rp_src != RP_SRC_STATIC)) { | |
440 | /* This means we searched and got rp node, needs unlock */ | |
441 | route_unlock_node(rn); | |
442 | ||
443 | if (active && pend) { | |
11e1593f | 444 | if (pim_addr_cmp(active->rp_address, pend->rp_address)) |
20fd30e5 | 445 | pim_rp_change(pim, pend->rp_address, |
446 | bsgrp_node->group, RP_SRC_BSR); | |
447 | } | |
448 | ||
449 | /* Possible when the first BSM has group with 0 rp count */ | |
450 | if ((!active) && (!pend)) { | |
451 | if (PIM_DEBUG_BSM) { | |
452 | zlog_debug( | |
453 | "%s: Both bsrp and partial list are empty", | |
15569c58 | 454 | __func__); |
20fd30e5 | 455 | } |
456 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, | |
457 | &bsgrp_node->group); | |
458 | pim_free_bsgrp_data(bsgrp_node); | |
459 | return; | |
460 | } | |
461 | ||
462 | /* Possible when a group with 0 rp count received in BSM */ | |
463 | if ((active) && (!pend)) { | |
464 | pim_rp_del(pim, active->rp_address, bsgrp_node->group, | |
465 | NULL, RP_SRC_BSR); | |
466 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, | |
467 | &bsgrp_node->group); | |
468 | if (PIM_DEBUG_BSM) { | |
469 | zlog_debug("%s:Pend List is null,del grp node", | |
15569c58 | 470 | __func__); |
20fd30e5 | 471 | } |
472 | pim_free_bsgrp_data(bsgrp_node); | |
473 | return; | |
474 | } | |
475 | } | |
476 | ||
477 | if ((had_rp_node) && (rp_info->rp_src == RP_SRC_STATIC)) { | |
478 | /* We need to unlock rn this case */ | |
479 | route_unlock_node(rn); | |
480 | /* there is a chance that static rp exist and bsrp cleaned | |
481 | * so clean bsgrp node if pending list empty | |
482 | */ | |
483 | if (!pend) { | |
484 | if (PIM_DEBUG_BSM) | |
485 | zlog_debug( | |
486 | "%s: Partial list is empty, static rp exists", | |
15569c58 | 487 | __func__); |
20fd30e5 | 488 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, |
489 | &bsgrp_node->group); | |
490 | pim_free_bsgrp_data(bsgrp_node); | |
491 | return; | |
492 | } | |
493 | } | |
494 | ||
495 | /* swap the list & delete all nodes in partial list (old bsrp_list) | |
496 | * before swap | |
497 | * active is head of bsrp list | |
498 | * pend is head of partial list | |
499 | * After swap | |
500 | * active is head of partial list | |
501 | * pend is head of bsrp list | |
502 | * So check appriate head after swap and clean the new partial list | |
503 | */ | |
fdab2940 DL |
504 | bsm_rpinfos_swap_all(bsgrp_node->bsrp_list, |
505 | bsgrp_node->partial_bsrp_list); | |
20fd30e5 | 506 | |
fdab2940 | 507 | if (active) |
20fd30e5 | 508 | pim_g2rp_timer_stop(active); |
fdab2940 | 509 | pim_bsm_rpinfos_free(bsgrp_node->partial_bsrp_list); |
20fd30e5 | 510 | } |
511 | ||
e309769a | 512 | static bool is_preferred_bsr(struct pim_instance *pim, pim_addr bsr, |
5acde1cf | 513 | uint32_t bsr_prio) |
514 | { | |
e309769a | 515 | if (!pim_addr_cmp(bsr, pim->global_scope.current_bsr)) |
5acde1cf | 516 | return true; |
517 | ||
518 | if (bsr_prio > pim->global_scope.current_bsr_prio) | |
519 | return true; | |
520 | ||
521 | else if (bsr_prio == pim->global_scope.current_bsr_prio) { | |
e309769a | 522 | if (pim_addr_cmp(bsr, pim->global_scope.current_bsr) >= 0) |
5acde1cf | 523 | return true; |
524 | else | |
525 | return false; | |
526 | } else | |
527 | return false; | |
528 | } | |
529 | ||
e309769a | 530 | static void pim_bsm_update(struct pim_instance *pim, pim_addr bsr, |
5acde1cf | 531 | uint32_t bsr_prio) |
532 | { | |
11e1593f | 533 | if (pim_addr_cmp(bsr, pim->global_scope.current_bsr)) { |
5f010b12 | 534 | pim_nht_bsr_del(pim, pim->global_scope.current_bsr); |
4efdb9c6 | 535 | pim_nht_bsr_add(pim, bsr); |
5acde1cf | 536 | |
5acde1cf | 537 | pim->global_scope.current_bsr = bsr; |
538 | pim->global_scope.current_bsr_first_ts = | |
539 | pim_time_monotonic_sec(); | |
540 | pim->global_scope.state = ACCEPT_PREFERRED; | |
541 | } | |
542 | pim->global_scope.current_bsr_prio = bsr_prio; | |
543 | pim->global_scope.current_bsr_last_ts = pim_time_monotonic_sec(); | |
544 | } | |
545 | ||
b09bd804 DL |
546 | void pim_bsm_clear(struct pim_instance *pim) |
547 | { | |
548 | struct route_node *rn; | |
549 | struct route_node *rpnode; | |
550 | struct bsgrp_node *bsgrp; | |
b63192cf | 551 | pim_addr nht_p; |
b09bd804 DL |
552 | struct prefix g_all; |
553 | struct rp_info *rp_all; | |
554 | struct pim_upstream *up; | |
555 | struct rp_info *rp_info; | |
62596d9a | 556 | bool upstream_updated = false; |
b09bd804 | 557 | |
5f010b12 | 558 | pim_nht_bsr_del(pim, pim->global_scope.current_bsr); |
b09bd804 DL |
559 | |
560 | /* Reset scope zone data */ | |
561 | pim->global_scope.accept_nofwd_bsm = false; | |
562 | pim->global_scope.state = ACCEPT_ANY; | |
e309769a | 563 | pim->global_scope.current_bsr = PIMADDR_ANY; |
b09bd804 DL |
564 | pim->global_scope.current_bsr_prio = 0; |
565 | pim->global_scope.current_bsr_first_ts = 0; | |
566 | pim->global_scope.current_bsr_last_ts = 0; | |
567 | pim->global_scope.bsm_frag_tag = 0; | |
568 | pim_bsm_frags_free(&pim->global_scope); | |
569 | ||
570 | pim_bs_timer_stop(&pim->global_scope); | |
571 | ||
572 | for (rn = route_top(pim->global_scope.bsrp_table); rn; | |
573 | rn = route_next(rn)) { | |
574 | bsgrp = rn->info; | |
575 | if (!bsgrp) | |
576 | continue; | |
577 | ||
578 | rpnode = route_node_lookup(pim->rp_table, &bsgrp->group); | |
579 | ||
580 | if (!rpnode) { | |
581 | pim_free_bsgrp_node(bsgrp->scope->bsrp_table, | |
582 | &bsgrp->group); | |
583 | pim_free_bsgrp_data(bsgrp); | |
584 | continue; | |
585 | } | |
586 | ||
587 | rp_info = (struct rp_info *)rpnode->info; | |
588 | ||
589 | if ((!rp_info) || (rp_info->rp_src != RP_SRC_BSR)) { | |
590 | pim_free_bsgrp_node(bsgrp->scope->bsrp_table, | |
591 | &bsgrp->group); | |
592 | pim_free_bsgrp_data(bsgrp); | |
593 | continue; | |
594 | } | |
595 | ||
596 | /* Deregister addr with Zebra NHT */ | |
b63192cf | 597 | nht_p = rp_info->rp.rpf_addr; |
b09bd804 DL |
598 | |
599 | if (PIM_DEBUG_PIM_NHT_RP) { | |
b63192cf | 600 | zlog_debug("%s: Deregister RP addr %pPA with Zebra ", |
b09bd804 DL |
601 | __func__, &nht_p); |
602 | } | |
603 | ||
e6e53006 | 604 | pim_delete_tracked_nexthop(pim, nht_p, NULL, rp_info); |
b09bd804 | 605 | |
c6ced474 | 606 | if (!pim_get_all_mcast_group(&g_all)) |
b09bd804 DL |
607 | return; |
608 | ||
609 | rp_all = pim_rp_find_match_group(pim, &g_all); | |
610 | ||
611 | if (rp_all == rp_info) { | |
b63192cf | 612 | rp_all->rp.rpf_addr = PIMADDR_ANY; |
b09bd804 DL |
613 | rp_all->i_am_rp = 0; |
614 | } else { | |
615 | /* Delete the rp_info from rp-list */ | |
616 | listnode_delete(pim->rp_list, rp_info); | |
617 | ||
618 | /* Delete the rp node from rp_table */ | |
619 | rpnode->info = NULL; | |
620 | route_unlock_node(rpnode); | |
621 | route_unlock_node(rpnode); | |
622 | XFREE(MTYPE_PIM_RP, rp_info); | |
623 | } | |
624 | ||
625 | pim_free_bsgrp_node(bsgrp->scope->bsrp_table, &bsgrp->group); | |
626 | pim_free_bsgrp_data(bsgrp); | |
627 | } | |
628 | pim_rp_refresh_group_to_rp_mapping(pim); | |
629 | ||
630 | ||
631 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { | |
632 | /* Find the upstream (*, G) whose upstream address is same as | |
633 | * the RP | |
634 | */ | |
2a27f13b | 635 | if (!pim_addr_is_any(up->sg.src)) |
b09bd804 DL |
636 | continue; |
637 | ||
638 | struct prefix grp; | |
639 | struct rp_info *trp_info; | |
640 | ||
c631920c | 641 | pim_addr_to_prefix(&grp, up->sg.grp); |
b09bd804 DL |
642 | trp_info = pim_rp_find_match_group(pim, &grp); |
643 | ||
644 | /* RP not found for the group grp */ | |
cc144e8b | 645 | if (pim_rpf_addr_is_inaddr_any(&trp_info->rp)) { |
b09bd804 DL |
646 | pim_upstream_rpf_clear(pim, up); |
647 | pim_rp_set_upstream_addr(pim, &up->upstream_addr, | |
648 | up->sg.src, up->sg.grp); | |
649 | } else { | |
650 | /* RP found for the group grp */ | |
651 | pim_upstream_update(pim, up); | |
62596d9a | 652 | upstream_updated = true; |
b09bd804 DL |
653 | } |
654 | } | |
62596d9a MR |
655 | |
656 | if (upstream_updated) | |
657 | pim_zebra_update_all_interfaces(pim); | |
b09bd804 DL |
658 | } |
659 | ||
79d97386 | 660 | static bool pim_bsm_send_intf(uint8_t *buf, int len, struct interface *ifp, |
29fd9fca | 661 | pim_addr dst_addr) |
79d97386 | 662 | { |
663 | struct pim_interface *pim_ifp; | |
664 | ||
665 | pim_ifp = ifp->info; | |
666 | ||
667 | if (!pim_ifp) { | |
668 | if (PIM_DEBUG_BSM) | |
669 | zlog_debug("%s: Pim interface not available for %s", | |
15569c58 | 670 | __func__, ifp->name); |
79d97386 | 671 | return false; |
672 | } | |
673 | ||
674 | if (pim_ifp->pim_sock_fd == -1) { | |
675 | if (PIM_DEBUG_BSM) | |
676 | zlog_debug("%s: Pim sock not available for %s", | |
15569c58 | 677 | __func__, ifp->name); |
79d97386 | 678 | return false; |
679 | } | |
680 | ||
3bb29c4e | 681 | if (pim_msg_send(pim_ifp->pim_sock_fd, pim_ifp->primary_address, |
ac5c9346 | 682 | dst_addr, buf, len, ifp)) { |
3bb29c4e | 683 | zlog_warn("%s: Could not send BSM message on interface: %s", |
15569c58 | 684 | __func__, ifp->name); |
3bb29c4e DS |
685 | return false; |
686 | } | |
687 | ||
ac5c9346 | 688 | if (!pim_ifp->pim_passive_enable) |
689 | pim_ifp->pim_ifstat_bsm_tx++; | |
690 | ||
79d97386 | 691 | pim_ifp->pim->bsm_sent++; |
692 | return true; | |
693 | } | |
694 | ||
40270c35 | 695 | static bool pim_bsm_frag_send(uint8_t *buf, uint32_t len, struct interface *ifp, |
29fd9fca | 696 | uint32_t pim_mtu, pim_addr dst_addr, bool no_fwd) |
40270c35 | 697 | { |
145e4c38 | 698 | struct pim_interface *pim_ifp = ifp->info; |
40270c35 | 699 | struct bsmmsg_grpinfo *grpinfo, *curgrp; |
700 | uint8_t *firstgrp_ptr; | |
701 | uint8_t *pkt; | |
702 | uint8_t *pak_start; | |
703 | uint32_t parsed_len = 0; | |
704 | uint32_t this_pkt_rem; | |
705 | uint32_t copy_byte_count; | |
706 | uint32_t this_pkt_len; | |
707 | uint8_t total_rp_cnt; | |
708 | uint8_t this_rp_cnt; | |
709 | uint8_t frag_rp_cnt; | |
710 | uint8_t rp_fit_cnt; | |
711 | bool pak_pending = false; | |
712 | ||
713 | /* MTU passed here is PIM MTU (IP MTU less IP Hdr) */ | |
714 | if (pim_mtu < (PIM_MIN_BSM_LEN)) { | |
715 | zlog_warn( | |
f79f7a7b | 716 | "%s: mtu(pim mtu: %d) size less than minimum bootstrap len", |
15569c58 | 717 | __func__, pim_mtu); |
40270c35 | 718 | if (PIM_DEBUG_BSM) |
719 | zlog_debug( | |
f79f7a7b | 720 | "%s: mtu (pim mtu:%d) less than minimum bootstrap len", |
15569c58 | 721 | __func__, pim_mtu); |
40270c35 | 722 | return false; |
723 | } | |
724 | ||
725 | pak_start = XCALLOC(MTYPE_PIM_BSM_PKT_VAR_MEM, pim_mtu); | |
726 | ||
40270c35 | 727 | pkt = pak_start; |
728 | ||
729 | /* Fill PIM header later before sending packet to calc checksum */ | |
730 | pkt += PIM_MSG_HEADER_LEN; | |
731 | buf += PIM_MSG_HEADER_LEN; | |
732 | ||
733 | /* copy bsm header to new packet at offset of pim hdr */ | |
734 | memcpy(pkt, buf, PIM_BSM_HDR_LEN); | |
735 | pkt += PIM_BSM_HDR_LEN; | |
736 | buf += PIM_BSM_HDR_LEN; | |
737 | parsed_len += (PIM_MSG_HEADER_LEN + PIM_BSM_HDR_LEN); | |
738 | ||
739 | /* Store the position of first grp ptr, which can be reused for | |
740 | * next packet to start filling group. old bsm header and pim hdr | |
741 | * remains. So need not be filled again for next packet onwards. | |
742 | */ | |
743 | firstgrp_ptr = pkt; | |
744 | ||
745 | /* we received mtu excluding IP hdr len as param | |
746 | * now this_pkt_rem is mtu excluding | |
747 | * PIM_BSM_HDR_LEN + PIM_MSG_HEADER_LEN | |
748 | */ | |
749 | this_pkt_rem = pim_mtu - (PIM_BSM_HDR_LEN + PIM_MSG_HEADER_LEN); | |
750 | ||
751 | /* For each group till the packet length parsed */ | |
752 | while (parsed_len < len) { | |
753 | /* pkt ---> fragment's current pointer | |
754 | * buf ---> input buffer's current pointer | |
755 | * mtu ---> size of the pim packet - PIM header | |
756 | * curgrp ---> current group on the fragment | |
757 | * grpinfo ---> current group on the input buffer | |
758 | * this_pkt_rem ---> bytes remaing on the current fragment | |
759 | * rp_fit_cnt ---> num of rp for current grp that | |
760 | * fits this frag | |
761 | * total_rp_cnt ---> total rp present for the group in the buf | |
762 | * frag_rp_cnt ---> no of rp for the group to be fit in | |
763 | * the frag | |
764 | * this_rp_cnt ---> how many rp have we parsed | |
765 | */ | |
766 | grpinfo = (struct bsmmsg_grpinfo *)buf; | |
767 | memcpy(pkt, buf, PIM_BSM_GRP_LEN); | |
768 | curgrp = (struct bsmmsg_grpinfo *)pkt; | |
769 | parsed_len += PIM_BSM_GRP_LEN; | |
770 | pkt += PIM_BSM_GRP_LEN; | |
771 | buf += PIM_BSM_GRP_LEN; | |
772 | this_pkt_rem -= PIM_BSM_GRP_LEN; | |
773 | ||
774 | /* initialize rp count and total_rp_cnt before the rp loop */ | |
775 | this_rp_cnt = 0; | |
776 | total_rp_cnt = grpinfo->frag_rp_count; | |
777 | ||
778 | /* Loop till all RPs for the group parsed */ | |
779 | while (this_rp_cnt < total_rp_cnt) { | |
780 | /* All RP from a group processed here. | |
781 | * group is pointed by grpinfo. | |
782 | * At this point make sure buf pointing to a RP | |
783 | * within a group | |
784 | */ | |
785 | rp_fit_cnt = this_pkt_rem / PIM_BSM_RP_LEN; | |
786 | ||
787 | /* calculate how many rp am i going to copy in | |
788 | * this frag | |
789 | */ | |
790 | if (rp_fit_cnt > (total_rp_cnt - this_rp_cnt)) | |
791 | frag_rp_cnt = total_rp_cnt - this_rp_cnt; | |
792 | else | |
793 | frag_rp_cnt = rp_fit_cnt; | |
794 | ||
795 | /* populate the frag rp count for the current grp */ | |
796 | curgrp->frag_rp_count = frag_rp_cnt; | |
797 | copy_byte_count = frag_rp_cnt * PIM_BSM_RP_LEN; | |
798 | ||
799 | /* copy all the rp that we are fitting in this | |
800 | * frag for the grp | |
801 | */ | |
802 | memcpy(pkt, buf, copy_byte_count); | |
803 | this_rp_cnt += frag_rp_cnt; | |
804 | buf += copy_byte_count; | |
805 | pkt += copy_byte_count; | |
806 | parsed_len += copy_byte_count; | |
807 | this_pkt_rem -= copy_byte_count; | |
808 | ||
809 | /* Either we couldn't fit all rp for the group or the | |
810 | * mtu reached | |
811 | */ | |
812 | if ((this_rp_cnt < total_rp_cnt) | |
813 | || (this_pkt_rem | |
814 | < (PIM_BSM_GRP_LEN + PIM_BSM_RP_LEN))) { | |
815 | /* No space to fit in more rp, send this pkt */ | |
816 | this_pkt_len = pim_mtu - this_pkt_rem; | |
145e4c38 DL |
817 | pim_msg_build_header( |
818 | pim_ifp->primary_address, dst_addr, | |
819 | pak_start, this_pkt_len, | |
820 | PIM_MSG_TYPE_BOOTSTRAP, no_fwd); | |
40270c35 | 821 | pim_bsm_send_intf(pak_start, this_pkt_len, ifp, |
822 | dst_addr); | |
823 | ||
824 | /* Construct next fragment. Reuse old packet */ | |
825 | pkt = firstgrp_ptr; | |
826 | this_pkt_rem = pim_mtu - (PIM_BSM_HDR_LEN | |
827 | + PIM_MSG_HEADER_LEN); | |
828 | ||
f5267398 DS |
829 | /* If pkt can't accommodate next group + at |
830 | * least one rp, we must break out of this inner | |
831 | * loop and process next RP | |
40270c35 | 832 | */ |
833 | if (total_rp_cnt == this_rp_cnt) | |
834 | break; | |
835 | ||
836 | /* If some more RPs for the same group pending, | |
837 | * fill grp hdr | |
838 | */ | |
839 | memcpy(pkt, (uint8_t *)grpinfo, | |
840 | PIM_BSM_GRP_LEN); | |
841 | curgrp = (struct bsmmsg_grpinfo *)pkt; | |
842 | pkt += PIM_BSM_GRP_LEN; | |
843 | this_pkt_rem -= PIM_BSM_GRP_LEN; | |
844 | pak_pending = false; | |
845 | } else { | |
846 | /* We filled something but not yet sent out */ | |
847 | pak_pending = true; | |
848 | } | |
849 | } /* while RP count */ | |
850 | } /*while parsed len */ | |
851 | ||
852 | /* Send if we have any unsent packet */ | |
853 | if (pak_pending) { | |
854 | this_pkt_len = pim_mtu - this_pkt_rem; | |
145e4c38 DL |
855 | pim_msg_build_header(pim_ifp->primary_address, dst_addr, |
856 | pak_start, this_pkt_len, | |
40270c35 | 857 | PIM_MSG_TYPE_BOOTSTRAP, no_fwd); |
858 | pim_bsm_send_intf(pak_start, (pim_mtu - this_pkt_rem), ifp, | |
859 | dst_addr); | |
860 | } | |
861 | XFREE(MTYPE_PIM_BSM_PKT_VAR_MEM, pak_start); | |
862 | return true; | |
863 | } | |
864 | ||
79d97386 | 865 | static void pim_bsm_fwd_whole_sz(struct pim_instance *pim, uint8_t *buf, |
866 | uint32_t len, int sz) | |
867 | { | |
868 | struct interface *ifp; | |
869 | struct pim_interface *pim_ifp; | |
29fd9fca | 870 | pim_addr dst_addr; |
79d97386 | 871 | uint32_t pim_mtu; |
2951a7a4 QY |
872 | bool no_fwd = false; |
873 | bool ret = false; | |
79d97386 | 874 | |
875 | /* For now only global scope zone is supported, so send on all | |
876 | * pim interfaces in the vrf | |
877 | */ | |
878 | dst_addr = qpim_all_pim_routers_addr; | |
879 | FOR_ALL_INTERFACES (pim->vrf, ifp) { | |
880 | pim_ifp = ifp->info; | |
881 | if ((!pim_ifp) || (!pim_ifp->bsm_enable)) | |
882 | continue; | |
9255f21e | 883 | |
884 | /* | |
885 | * RFC 5059 Sec 3.4: | |
886 | * When a Bootstrap message is forwarded, it is forwarded out | |
887 | * of every multicast-capable interface that has PIM neighbors. | |
888 | * | |
889 | * So skipping pim interfaces with no neighbors. | |
890 | */ | |
891 | if (listcount(pim_ifp->pim_neighbor_list) == 0) | |
892 | continue; | |
893 | ||
79d97386 | 894 | pim_hello_require(ifp); |
895 | pim_mtu = ifp->mtu - MAX_IP_HDR_LEN; | |
896 | if (pim_mtu < len) { | |
40270c35 | 897 | ret = pim_bsm_frag_send(buf, len, ifp, pim_mtu, |
898 | dst_addr, no_fwd); | |
899 | if (PIM_DEBUG_BSM) | |
900 | zlog_debug("%s: pim_bsm_frag_send returned %s", | |
15569c58 | 901 | __func__, ret ? "TRUE" : "FALSE"); |
79d97386 | 902 | } else { |
145e4c38 DL |
903 | pim_msg_build_header(pim_ifp->primary_address, dst_addr, |
904 | buf, len, PIM_MSG_TYPE_BOOTSTRAP, | |
79d97386 | 905 | no_fwd); |
906 | if (!pim_bsm_send_intf(buf, len, ifp, dst_addr)) { | |
907 | if (PIM_DEBUG_BSM) | |
908 | zlog_debug( | |
2951a7a4 | 909 | "%s: pim_bsm_send_intf returned false", |
15569c58 | 910 | __func__); |
79d97386 | 911 | } |
912 | } | |
913 | } | |
914 | } | |
915 | ||
6bb2ef35 | 916 | bool pim_bsm_new_nbr_fwd(struct pim_neighbor *neigh, struct interface *ifp) |
917 | { | |
29fd9fca | 918 | pim_addr dst_addr; |
6bb2ef35 | 919 | struct pim_interface *pim_ifp; |
920 | struct bsm_scope *scope; | |
d4a4525c | 921 | struct bsm_frag *bsfrag; |
6bb2ef35 | 922 | uint32_t pim_mtu; |
923 | bool no_fwd = true; | |
924 | bool ret = false; | |
925 | ||
9bb93fa0 DL |
926 | if (PIM_DEBUG_BSM) |
927 | zlog_debug("%s: New neighbor %pPA seen on %s", __func__, | |
928 | &neigh->source_addr, ifp->name); | |
6bb2ef35 | 929 | |
930 | pim_ifp = ifp->info; | |
931 | ||
932 | /* DR only forwards BSM packet */ | |
034db86b | 933 | if (!pim_addr_cmp(pim_ifp->pim_dr_addr, pim_ifp->primary_address)) { |
6bb2ef35 | 934 | if (PIM_DEBUG_BSM) |
935 | zlog_debug( | |
936 | "%s: It is not DR, so don't forward BSM packet", | |
5e81f5dd | 937 | __func__); |
6bb2ef35 | 938 | } |
939 | ||
940 | if (!pim_ifp->bsm_enable) { | |
941 | if (PIM_DEBUG_BSM) | |
5e81f5dd DS |
942 | zlog_debug("%s: BSM proc not enabled on %s", __func__, |
943 | ifp->name); | |
6bb2ef35 | 944 | return ret; |
945 | } | |
946 | ||
947 | scope = &pim_ifp->pim->global_scope; | |
948 | ||
d4a4525c | 949 | if (!bsm_frags_count(scope->bsm_frags)) { |
6bb2ef35 | 950 | if (PIM_DEBUG_BSM) |
951 | zlog_debug("%s: BSM list for the scope is empty", | |
5e81f5dd | 952 | __func__); |
6bb2ef35 | 953 | return ret; |
954 | } | |
955 | ||
956 | if (!pim_ifp->ucast_bsm_accept) { | |
957 | dst_addr = qpim_all_pim_routers_addr; | |
958 | if (PIM_DEBUG_BSM) | |
cefd2343 | 959 | zlog_debug("%s: Sending BSM mcast to %pPA", __func__, |
960 | &neigh->source_addr); | |
6bb2ef35 | 961 | } else { |
962 | dst_addr = neigh->source_addr; | |
963 | if (PIM_DEBUG_BSM) | |
cefd2343 | 964 | zlog_debug("%s: Sending BSM ucast to %pPA", __func__, |
965 | &neigh->source_addr); | |
6bb2ef35 | 966 | } |
967 | pim_mtu = ifp->mtu - MAX_IP_HDR_LEN; | |
968 | pim_hello_require(ifp); | |
969 | ||
d4a4525c DL |
970 | frr_each (bsm_frags, scope->bsm_frags, bsfrag) { |
971 | if (pim_mtu < bsfrag->size) { | |
972 | ret = pim_bsm_frag_send(bsfrag->data, bsfrag->size, ifp, | |
973 | pim_mtu, dst_addr, no_fwd); | |
6bb2ef35 | 974 | if (!ret) { |
975 | if (PIM_DEBUG_BSM) | |
976 | zlog_debug( | |
977 | "%s: pim_bsm_frag_send failed", | |
5e81f5dd | 978 | __func__); |
6bb2ef35 | 979 | } |
980 | } else { | |
981 | /* Pim header needs to be constructed */ | |
145e4c38 DL |
982 | pim_msg_build_header(pim_ifp->primary_address, dst_addr, |
983 | bsfrag->data, bsfrag->size, | |
6bb2ef35 | 984 | PIM_MSG_TYPE_BOOTSTRAP, no_fwd); |
d4a4525c DL |
985 | ret = pim_bsm_send_intf(bsfrag->data, bsfrag->size, ifp, |
986 | dst_addr); | |
6bb2ef35 | 987 | if (!ret) { |
988 | if (PIM_DEBUG_BSM) | |
989 | zlog_debug( | |
990 | "%s: pim_bsm_frag_send failed", | |
5e81f5dd | 991 | __func__); |
6bb2ef35 | 992 | } |
993 | } | |
994 | } | |
995 | return ret; | |
996 | } | |
997 | ||
d0e418b4 | 998 | struct bsgrp_node *pim_bsm_get_bsgrp_node(struct bsm_scope *scope, |
999 | struct prefix *grp) | |
1000 | { | |
1001 | struct route_node *rn; | |
1002 | struct bsgrp_node *bsgrp; | |
1003 | ||
1004 | rn = route_node_lookup(scope->bsrp_table, grp); | |
1005 | if (!rn) { | |
1006 | if (PIM_DEBUG_BSM) | |
1007 | zlog_debug("%s: Route node doesn't exist for the group", | |
15569c58 | 1008 | __func__); |
d0e418b4 | 1009 | return NULL; |
1010 | } | |
1011 | bsgrp = rn->info; | |
1012 | route_unlock_node(rn); | |
1013 | ||
1014 | return bsgrp; | |
1015 | } | |
5acde1cf | 1016 | |
c0590b1c | 1017 | static uint32_t hash_calc_on_grp_rp(struct prefix group, pim_addr rp, |
7b3e6ba1 | 1018 | uint8_t hashmasklen) |
1019 | { | |
1020 | uint64_t temp; | |
1021 | uint32_t hash; | |
1022 | uint32_t grpaddr; | |
1023 | uint32_t rp_add; | |
1024 | uint32_t mask = 0xffffffff; | |
1025 | ||
1026 | /* mask to be made zero if hashmasklen is 0 because mask << 32 | |
1027 | * may not give 0. hashmasklen can be 0 to 32. | |
1028 | */ | |
1029 | if (hashmasklen == 0) | |
1030 | mask = 0; | |
1031 | ||
1032 | /* in_addr stores ip in big endian, hence network byte order | |
1033 | * convert to uint32 before processing hash | |
1034 | */ | |
c0590b1c | 1035 | #if PIM_IPV == 4 |
7b3e6ba1 | 1036 | grpaddr = ntohl(group.u.prefix4.s_addr); |
c0590b1c | 1037 | #else |
1038 | grpaddr = group.u.prefix6.s6_addr32[0] ^ group.u.prefix6.s6_addr32[1] ^ | |
1039 | group.u.prefix6.s6_addr32[2] ^ group.u.prefix6.s6_addr32[3]; | |
1040 | #endif | |
7b3e6ba1 | 1041 | /* Avoid shifting by 32 bit on a 32 bit register */ |
1042 | if (hashmasklen) | |
1043 | grpaddr = grpaddr & ((mask << (32 - hashmasklen))); | |
1044 | else | |
1045 | grpaddr = grpaddr & mask; | |
1407e40f | 1046 | |
c0590b1c | 1047 | #if PIM_IPV == 4 |
7b3e6ba1 | 1048 | rp_add = ntohl(rp.s_addr); |
c0590b1c | 1049 | #else |
1050 | rp_add = rp.s6_addr32[0] ^ rp.s6_addr32[1] ^ rp.s6_addr32[2] ^ | |
1051 | rp.s6_addr32[3]; | |
1052 | #endif | |
29f7fc87 DS |
1053 | temp = 1103515245 * ((1103515245 * (uint64_t)grpaddr + 12345) ^ rp_add) |
1054 | + 12345; | |
7b3e6ba1 | 1055 | hash = temp & (0x7fffffff); |
1056 | return hash; | |
1057 | } | |
1058 | ||
1059 | static bool pim_install_bsm_grp_rp(struct pim_instance *pim, | |
1060 | struct bsgrp_node *grpnode, | |
1061 | struct bsmmsg_rpinfo *rp) | |
1062 | { | |
1063 | struct bsm_rpinfo *bsm_rpinfo; | |
1064 | uint8_t hashMask_len = pim->global_scope.hashMasklen; | |
1065 | ||
1066 | /*memory allocation for bsm_rpinfo */ | |
fdab2940 | 1067 | bsm_rpinfo = XCALLOC(MTYPE_PIM_BSRP_INFO, sizeof(*bsm_rpinfo)); |
7b3e6ba1 | 1068 | |
7b3e6ba1 | 1069 | bsm_rpinfo->rp_prio = rp->rp_pri; |
1070 | bsm_rpinfo->rp_holdtime = rp->rp_holdtime; | |
1407e40f | 1071 | bsm_rpinfo->rp_address = rp->rpaddr.addr; |
7b3e6ba1 | 1072 | bsm_rpinfo->elapse_time = 0; |
1073 | ||
1074 | /* Back pointer to the group node. */ | |
1075 | bsm_rpinfo->bsgrp_node = grpnode; | |
1076 | ||
1077 | /* update hash for this rp node */ | |
1078 | bsm_rpinfo->hash = hash_calc_on_grp_rp(grpnode->group, rp->rpaddr.addr, | |
1079 | hashMask_len); | |
fdab2940 | 1080 | if (bsm_rpinfos_add(grpnode->partial_bsrp_list, bsm_rpinfo) == NULL) { |
7b3e6ba1 | 1081 | if (PIM_DEBUG_BSM) |
1082 | zlog_debug( | |
63efca0e | 1083 | "%s, bs_rpinfo node added to the partial bs_rplist.", |
15569c58 | 1084 | __func__); |
7b3e6ba1 | 1085 | return true; |
1086 | } | |
1087 | ||
1088 | if (PIM_DEBUG_BSM) | |
63efca0e | 1089 | zlog_debug("%s: list node not added", __func__); |
7b3e6ba1 | 1090 | |
fdab2940 | 1091 | XFREE(MTYPE_PIM_BSRP_INFO, bsm_rpinfo); |
7b3e6ba1 | 1092 | return false; |
1093 | } | |
1094 | ||
1095 | static void pim_update_pending_rp_cnt(struct bsm_scope *sz, | |
1096 | struct bsgrp_node *bsgrp, | |
1097 | uint16_t bsm_frag_tag, | |
1098 | uint32_t total_rp_count) | |
1099 | { | |
1100 | if (bsgrp->pend_rp_cnt) { | |
1101 | /* received bsm is different packet , | |
1102 | * it is not same fragment. | |
1103 | */ | |
1104 | if (bsm_frag_tag != bsgrp->frag_tag) { | |
1105 | if (PIM_DEBUG_BSM) | |
1106 | zlog_debug( | |
63efca0e | 1107 | "%s,Received a new BSM ,so clear the pending bs_rpinfo list.", |
15569c58 | 1108 | __func__); |
fdab2940 | 1109 | pim_bsm_rpinfos_free(bsgrp->partial_bsrp_list); |
7b3e6ba1 | 1110 | bsgrp->pend_rp_cnt = total_rp_count; |
1111 | } | |
1112 | } else | |
1113 | bsgrp->pend_rp_cnt = total_rp_count; | |
1114 | ||
1115 | bsgrp->frag_tag = bsm_frag_tag; | |
1116 | } | |
1117 | ||
1118 | /* Parsing BSR packet and adding to partial list of corresponding bsgrp node */ | |
1119 | static bool pim_bsm_parse_install_g2rp(struct bsm_scope *scope, uint8_t *buf, | |
1120 | int buflen, uint16_t bsm_frag_tag) | |
1121 | { | |
1122 | struct bsmmsg_grpinfo grpinfo; | |
1123 | struct bsmmsg_rpinfo rpinfo; | |
1124 | struct prefix group; | |
1125 | struct bsgrp_node *bsgrp = NULL; | |
1126 | int frag_rp_cnt = 0; | |
1127 | int offset = 0; | |
1128 | int ins_count = 0; | |
81a688bc | 1129 | pim_addr grp_addr; |
7b3e6ba1 | 1130 | |
1131 | while (buflen > offset) { | |
b1945363 DS |
1132 | if (offset + (int)sizeof(struct bsmmsg_grpinfo) > buflen) { |
1133 | if (PIM_DEBUG_BSM) | |
1134 | zlog_debug( | |
1135 | "%s: buflen received %d is less than the internal data structure of the packet would suggest", | |
15569c58 | 1136 | __func__, buflen); |
b1945363 DS |
1137 | return false; |
1138 | } | |
7b3e6ba1 | 1139 | /* Extract Group tlv from BSM */ |
1140 | memcpy(&grpinfo, buf, sizeof(struct bsmmsg_grpinfo)); | |
81a688bc | 1141 | grp_addr = grpinfo.group.addr; |
7b3e6ba1 | 1142 | |
81a688bc | 1143 | if (PIM_DEBUG_BSM) |
7b3e6ba1 | 1144 | zlog_debug( |
81a688bc | 1145 | "%s, Group %pPAs Rpcount:%d Fragment-Rp-count:%d", |
1146 | __func__, &grp_addr, grpinfo.rp_count, | |
7b3e6ba1 | 1147 | grpinfo.frag_rp_count); |
7b3e6ba1 | 1148 | |
1149 | buf += sizeof(struct bsmmsg_grpinfo); | |
1150 | offset += sizeof(struct bsmmsg_grpinfo); | |
1151 | ||
81a688bc | 1152 | group.family = PIM_AF; |
1153 | if (grpinfo.group.mask > PIM_MAX_BITLEN) { | |
b1945363 | 1154 | if (PIM_DEBUG_BSM) |
15569c58 | 1155 | zlog_debug( |
81a688bc | 1156 | "%s, prefix length specified: %d is too long", |
15569c58 | 1157 | __func__, grpinfo.group.mask); |
b1945363 DS |
1158 | return false; |
1159 | } | |
81a688bc | 1160 | |
1161 | pim_addr_to_prefix(&group, grp_addr); | |
7b3e6ba1 | 1162 | group.prefixlen = grpinfo.group.mask; |
7b3e6ba1 | 1163 | |
1164 | /* Get the Group node for the BSM rp table */ | |
1165 | bsgrp = pim_bsm_get_bsgrp_node(scope, &group); | |
1166 | ||
43038bd5 DL |
1167 | if (grpinfo.rp_count == 0) { |
1168 | struct bsm_rpinfo *old_rpinfo; | |
1169 | ||
1170 | /* BSR explicitly no longer has RPs for this group */ | |
1171 | if (!bsgrp) | |
1172 | continue; | |
1173 | ||
81a688bc | 1174 | if (PIM_DEBUG_BSM) |
1175 | zlog_debug( | |
1176 | "%s, Rp count is zero for group: %pPAs", | |
1177 | __func__, &grp_addr); | |
43038bd5 DL |
1178 | |
1179 | old_rpinfo = bsm_rpinfos_first(bsgrp->bsrp_list); | |
1180 | if (old_rpinfo) | |
1181 | pim_rp_del(scope->pim, old_rpinfo->rp_address, | |
1182 | group, NULL, RP_SRC_BSR); | |
1183 | ||
1184 | pim_free_bsgrp_node(scope->bsrp_table, &bsgrp->group); | |
1185 | pim_free_bsgrp_data(bsgrp); | |
1186 | continue; | |
1187 | } | |
1188 | ||
7b3e6ba1 | 1189 | if (!bsgrp) { |
1190 | if (PIM_DEBUG_BSM) | |
63efca0e DL |
1191 | zlog_debug("%s, Create new BSM Group node.", |
1192 | __func__); | |
7b3e6ba1 | 1193 | |
1194 | /* create a new node to be added to the tree. */ | |
1195 | bsgrp = pim_bsm_new_bsgrp_node(scope->bsrp_table, | |
1196 | &group); | |
1197 | ||
1198 | if (!bsgrp) { | |
1199 | zlog_debug( | |
63efca0e | 1200 | "%s, Failed to get the BSM group node.", |
15569c58 | 1201 | __func__); |
7b3e6ba1 | 1202 | continue; |
1203 | } | |
1204 | ||
1205 | bsgrp->scope = scope; | |
1206 | } | |
1207 | ||
1208 | pim_update_pending_rp_cnt(scope, bsgrp, bsm_frag_tag, | |
1209 | grpinfo.rp_count); | |
1210 | frag_rp_cnt = grpinfo.frag_rp_count; | |
1211 | ins_count = 0; | |
1212 | ||
1213 | while (frag_rp_cnt--) { | |
b1945363 DS |
1214 | if (offset + (int)sizeof(struct bsmmsg_rpinfo) |
1215 | > buflen) { | |
1216 | if (PIM_DEBUG_BSM) | |
1217 | zlog_debug( | |
1218 | "%s, buflen received: %u is less than the internal data structure of the packet would suggest", | |
15569c58 | 1219 | __func__, buflen); |
b1945363 DS |
1220 | return false; |
1221 | } | |
1222 | ||
7b3e6ba1 | 1223 | /* Extract RP address tlv from BSM */ |
1224 | memcpy(&rpinfo, buf, sizeof(struct bsmmsg_rpinfo)); | |
1225 | rpinfo.rp_holdtime = ntohs(rpinfo.rp_holdtime); | |
1226 | buf += sizeof(struct bsmmsg_rpinfo); | |
1227 | offset += sizeof(struct bsmmsg_rpinfo); | |
1228 | ||
1229 | if (PIM_DEBUG_BSM) { | |
1407e40f | 1230 | pim_addr rp_addr; |
7b3e6ba1 | 1231 | |
1407e40f | 1232 | rp_addr = rpinfo.rpaddr.addr; |
7b3e6ba1 | 1233 | zlog_debug( |
1407e40f | 1234 | "%s, Rp address - %pPAs; pri:%d hold:%d", |
1235 | __func__, &rp_addr, rpinfo.rp_pri, | |
15569c58 | 1236 | rpinfo.rp_holdtime); |
7b3e6ba1 | 1237 | } |
1238 | ||
1239 | /* Call Install api to update grp-rp mappings */ | |
1240 | if (pim_install_bsm_grp_rp(scope->pim, bsgrp, &rpinfo)) | |
1241 | ins_count++; | |
1242 | } | |
1243 | ||
1244 | bsgrp->pend_rp_cnt -= ins_count; | |
1245 | ||
1246 | if (!bsgrp->pend_rp_cnt) { | |
1247 | if (PIM_DEBUG_BSM) | |
1248 | zlog_debug( | |
1249 | "%s, Recvd all the rps for this group, so bsrp list with penidng rp list.", | |
15569c58 | 1250 | __func__); |
20fd30e5 | 1251 | /* replace the bsrp_list with pending list */ |
1252 | pim_instate_pend_list(bsgrp); | |
7b3e6ba1 | 1253 | } |
1254 | } | |
1255 | return true; | |
1256 | } | |
1257 | ||
76bfa030 | 1258 | int pim_bsm_process(struct interface *ifp, pim_sgaddr *sg, uint8_t *buf, |
5acde1cf | 1259 | uint32_t buf_size, bool no_fwd) |
1260 | { | |
1261 | struct bsm_hdr *bshdr; | |
79d97386 | 1262 | int sz = PIM_GBL_SZ_ID; |
5acde1cf | 1263 | struct bsmmsg_grpinfo *msg_grp; |
1264 | struct pim_interface *pim_ifp = NULL; | |
d4a4525c | 1265 | struct bsm_frag *bsfrag; |
5acde1cf | 1266 | struct pim_instance *pim; |
5acde1cf | 1267 | uint16_t frag_tag; |
cefb7247 | 1268 | pim_addr bsr_addr; |
2951a7a4 | 1269 | bool empty_bsm = false; |
5acde1cf | 1270 | |
1271 | /* BSM Packet acceptance validation */ | |
1272 | pim_ifp = ifp->info; | |
1273 | if (!pim_ifp) { | |
1274 | if (PIM_DEBUG_BSM) | |
1275 | zlog_debug("%s: multicast not enabled on interface %s", | |
15569c58 | 1276 | __func__, ifp->name); |
5acde1cf | 1277 | return -1; |
1278 | } | |
1279 | ||
fd3eb43d | 1280 | if (pim_ifp->pim_passive_enable) { |
1281 | if (PIM_DEBUG_PIM_PACKETS) | |
1282 | zlog_debug( | |
1283 | "skip receiving PIM message on passive interface %s", | |
1284 | ifp->name); | |
1285 | return 0; | |
1286 | } | |
1287 | ||
5acde1cf | 1288 | pim_ifp->pim_ifstat_bsm_rx++; |
1289 | pim = pim_ifp->pim; | |
1290 | pim->bsm_rcvd++; | |
1291 | ||
1292 | /* Drop if bsm processing is disabled on interface */ | |
1293 | if (!pim_ifp->bsm_enable) { | |
15569c58 DA |
1294 | zlog_warn("%s: BSM not enabled on interface %s", __func__, |
1295 | ifp->name); | |
5acde1cf | 1296 | pim_ifp->pim_ifstat_bsm_cfg_miss++; |
1297 | pim->bsm_dropped++; | |
1298 | return -1; | |
1299 | } | |
1300 | ||
d83a854b | 1301 | if (buf_size < (PIM_MSG_HEADER_LEN + sizeof(struct bsm_hdr))) { |
b1945363 | 1302 | if (PIM_DEBUG_BSM) |
15569c58 DA |
1303 | zlog_debug( |
1304 | "%s: received buffer length of %d which is too small to properly decode", | |
1305 | __func__, buf_size); | |
b1945363 DS |
1306 | return -1; |
1307 | } | |
1308 | ||
5acde1cf | 1309 | bshdr = (struct bsm_hdr *)(buf + PIM_MSG_HEADER_LEN); |
1ae87bdd | 1310 | if (bshdr->hm_len > PIM_MAX_BITLEN) { |
1311 | zlog_warn( | |
1312 | "Bad hashmask length for %s; got %hhu, expected value in range 0-32", | |
1313 | PIM_AF_NAME, bshdr->hm_len); | |
817f8933 QY |
1314 | pim->bsm_dropped++; |
1315 | return -1; | |
1316 | } | |
5acde1cf | 1317 | pim->global_scope.hashMasklen = bshdr->hm_len; |
1318 | frag_tag = ntohs(bshdr->frag_tag); | |
cefb7247 DL |
1319 | /* NB: bshdr->bsr_addr.addr is packed/unaligned => memcpy */ |
1320 | memcpy(&bsr_addr, &bshdr->bsr_addr.addr, sizeof(bsr_addr)); | |
5acde1cf | 1321 | |
1322 | /* Identify empty BSM */ | |
1323 | if ((buf_size - PIM_BSM_HDR_LEN - PIM_MSG_HEADER_LEN) < PIM_BSM_GRP_LEN) | |
1324 | empty_bsm = true; | |
1325 | ||
1326 | if (!empty_bsm) { | |
1327 | msg_grp = (struct bsmmsg_grpinfo *)(buf + PIM_MSG_HEADER_LEN | |
1328 | + PIM_BSM_HDR_LEN); | |
1329 | /* Currently we don't support scope zoned BSM */ | |
1330 | if (msg_grp->group.sz) { | |
1331 | if (PIM_DEBUG_BSM) | |
1332 | zlog_debug( | |
1333 | "%s : Administratively scoped range BSM received", | |
15569c58 | 1334 | __func__); |
5acde1cf | 1335 | pim_ifp->pim_ifstat_bsm_invalid_sz++; |
1336 | pim->bsm_dropped++; | |
1337 | return -1; | |
1338 | } | |
1339 | } | |
1340 | ||
1341 | /* Drop if bsr is not preferred bsr */ | |
cefb7247 | 1342 | if (!is_preferred_bsr(pim, bsr_addr, bshdr->bsr_prio)) { |
5acde1cf | 1343 | if (PIM_DEBUG_BSM) |
1344 | zlog_debug("%s : Received a non-preferred BSM", | |
15569c58 | 1345 | __func__); |
5acde1cf | 1346 | pim->bsm_dropped++; |
1347 | return -1; | |
1348 | } | |
1349 | ||
1350 | if (no_fwd) { | |
1351 | /* only accept no-forward BSM if quick refresh on startup */ | |
1352 | if ((pim->global_scope.accept_nofwd_bsm) | |
1353 | || (frag_tag == pim->global_scope.bsm_frag_tag)) { | |
1354 | pim->global_scope.accept_nofwd_bsm = false; | |
1355 | } else { | |
1356 | if (PIM_DEBUG_BSM) | |
1357 | zlog_debug( | |
1ae87bdd | 1358 | "%s : nofwd_bsm received on %pPAs when accpt_nofwd_bsm false", |
cefb7247 | 1359 | __func__, &bsr_addr); |
5acde1cf | 1360 | pim->bsm_dropped++; |
1361 | pim_ifp->pim_ifstat_ucast_bsm_cfg_miss++; | |
1362 | return -1; | |
1363 | } | |
1364 | } | |
1365 | ||
8b462d55 SP |
1366 | /* BSM packet is seen, so resetting accept_nofwd_bsm to false */ |
1367 | if (pim->global_scope.accept_nofwd_bsm) | |
1368 | pim->global_scope.accept_nofwd_bsm = false; | |
1369 | ||
f0e91749 | 1370 | if (!pim_addr_cmp(sg->grp, qpim_all_pim_routers_addr)) { |
4efdb9c6 DL |
1371 | /* Multicast BSMs are only accepted if source interface & IP |
1372 | * match RPF towards the BSR's IP address, or they have | |
1373 | * no-forward set | |
1374 | */ | |
cefb7247 DL |
1375 | if (!no_fwd && |
1376 | !pim_nht_bsr_rpf_check(pim, bsr_addr, ifp, sg->src)) { | |
4efdb9c6 DL |
1377 | if (PIM_DEBUG_BSM) |
1378 | zlog_debug( | |
1ae87bdd | 1379 | "BSM check: RPF to BSR %pPAs is not %pPA%%%s", |
cefb7247 | 1380 | &bsr_addr, &sg->src, ifp->name); |
4efdb9c6 DL |
1381 | pim->bsm_dropped++; |
1382 | return -1; | |
5acde1cf | 1383 | } |
76bfa030 | 1384 | } else if (if_address_is_local(&sg->grp, PIM_AF, pim->vrf->vrf_id)) { |
5acde1cf | 1385 | /* Unicast BSM received - if ucast bsm not enabled on |
1386 | * the interface, drop it | |
1387 | */ | |
1388 | if (!pim_ifp->ucast_bsm_accept) { | |
1389 | if (PIM_DEBUG_BSM) | |
1390 | zlog_debug( | |
1391 | "%s : Unicast BSM not enabled on interface %s", | |
15569c58 | 1392 | __func__, ifp->name); |
5acde1cf | 1393 | pim_ifp->pim_ifstat_ucast_bsm_cfg_miss++; |
1394 | pim->bsm_dropped++; | |
1395 | return -1; | |
1396 | } | |
1397 | ||
1398 | } else { | |
1399 | if (PIM_DEBUG_BSM) | |
1400 | zlog_debug("%s : Invalid destination address", | |
15569c58 | 1401 | __func__); |
5acde1cf | 1402 | pim->bsm_dropped++; |
1403 | return -1; | |
1404 | } | |
1405 | ||
1406 | if (empty_bsm) { | |
1407 | if (PIM_DEBUG_BSM) | |
15569c58 | 1408 | zlog_debug("%s : Empty Pref BSM received", __func__); |
5acde1cf | 1409 | } |
7b3e6ba1 | 1410 | /* Parse Update bsm rp table and install/uninstall rp if required */ |
1411 | if (!pim_bsm_parse_install_g2rp( | |
1412 | &pim_ifp->pim->global_scope, | |
1413 | (buf + PIM_BSM_HDR_LEN + PIM_MSG_HEADER_LEN), | |
1414 | (buf_size - PIM_BSM_HDR_LEN - PIM_MSG_HEADER_LEN), | |
1415 | frag_tag)) { | |
1416 | if (PIM_DEBUG_BSM) { | |
63efca0e | 1417 | zlog_debug("%s, Parsing BSM failed.", __func__); |
7b3e6ba1 | 1418 | } |
1419 | pim->bsm_dropped++; | |
1420 | return -1; | |
1421 | } | |
5acde1cf | 1422 | /* Restart the bootstrap timer */ |
1423 | pim_bs_timer_restart(&pim_ifp->pim->global_scope, | |
1424 | PIM_BSR_DEFAULT_TIMEOUT); | |
1425 | ||
1426 | /* If new BSM received, clear the old bsm database */ | |
1427 | if (pim_ifp->pim->global_scope.bsm_frag_tag != frag_tag) { | |
1428 | if (PIM_DEBUG_BSM) { | |
1429 | zlog_debug("%s: Current frag tag: %d Frag teg rcvd: %d", | |
15569c58 | 1430 | __func__, |
5acde1cf | 1431 | pim_ifp->pim->global_scope.bsm_frag_tag, |
1432 | frag_tag); | |
1433 | } | |
d4a4525c | 1434 | pim_bsm_frags_free(&pim_ifp->pim->global_scope); |
5acde1cf | 1435 | pim_ifp->pim->global_scope.bsm_frag_tag = frag_tag; |
1436 | } | |
1437 | ||
1438 | /* update the scope information from bsm */ | |
cefb7247 | 1439 | pim_bsm_update(pim, bsr_addr, bshdr->bsr_prio); |
79d97386 | 1440 | |
1441 | if (!no_fwd) { | |
1442 | pim_bsm_fwd_whole_sz(pim_ifp->pim, buf, buf_size, sz); | |
d4a4525c DL |
1443 | bsfrag = XCALLOC(MTYPE_PIM_BSM_FRAG, |
1444 | sizeof(struct bsm_frag) + buf_size); | |
79d97386 | 1445 | |
d4a4525c DL |
1446 | bsfrag->size = buf_size; |
1447 | memcpy(bsfrag->data, buf, buf_size); | |
1448 | bsm_frags_add_tail(pim_ifp->pim->global_scope.bsm_frags, | |
1449 | bsfrag); | |
79d97386 | 1450 | } |
1451 | ||
5acde1cf | 1452 | return 0; |
1453 | } |