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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) | |
62 | vty_out(vty, " no ip pim bsm\n"); | |
63 | if (!pim_ifp->ucast_bsm_accept) | |
64 | vty_out(vty, " no ip pim unicast-bsm\n"); | |
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 | ||
23255dfd | 160 | static int pim_on_bs_timer(struct thread *t) |
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 | return 0; |
204 | } | |
205 | ||
b09bd804 | 206 | static void pim_bs_timer_stop(struct bsm_scope *scope) |
23255dfd | 207 | { |
208 | if (PIM_DEBUG_BSM) | |
15569c58 DA |
209 | zlog_debug("%s : BS timer being stopped of sz: %d", __func__, |
210 | scope->sz_id); | |
23255dfd | 211 | THREAD_OFF(scope->bs_timer); |
212 | } | |
213 | ||
214 | static void pim_bs_timer_start(struct bsm_scope *scope, int bs_timeout) | |
215 | { | |
216 | if (!scope) { | |
217 | if (PIM_DEBUG_BSM) | |
15569c58 | 218 | zlog_debug("%s : Invalid scope(NULL).", __func__); |
23255dfd | 219 | return; |
220 | } | |
221 | THREAD_OFF(scope->bs_timer); | |
222 | if (PIM_DEBUG_BSM) | |
15569c58 DA |
223 | zlog_debug( |
224 | "%s : starting bs timer for scope %d with timeout %d secs", | |
225 | __func__, scope->sz_id, bs_timeout); | |
23255dfd | 226 | thread_add_timer(router->master, pim_on_bs_timer, scope, bs_timeout, |
227 | &scope->bs_timer); | |
228 | } | |
229 | ||
5acde1cf | 230 | static inline void pim_bs_timer_restart(struct bsm_scope *scope, int bs_timeout) |
231 | { | |
232 | pim_bs_timer_start(scope, bs_timeout); | |
233 | } | |
234 | ||
361b5843 | 235 | void pim_bsm_proc_init(struct pim_instance *pim) |
236 | { | |
237 | memset(&pim->global_scope, 0, sizeof(struct bsm_scope)); | |
238 | ||
239 | pim->global_scope.sz_id = PIM_GBL_SZ_ID; | |
240 | pim->global_scope.bsrp_table = route_table_init(); | |
241 | pim->global_scope.accept_nofwd_bsm = true; | |
242 | pim->global_scope.state = NO_INFO; | |
243 | pim->global_scope.pim = pim; | |
d4a4525c | 244 | bsm_frags_init(pim->global_scope.bsm_frags); |
361b5843 | 245 | pim_bs_timer_start(&pim->global_scope, PIM_BS_TIME); |
246 | } | |
247 | ||
248 | void pim_bsm_proc_free(struct pim_instance *pim) | |
249 | { | |
250 | struct route_node *rn; | |
251 | struct bsgrp_node *bsgrp; | |
252 | ||
253 | pim_bs_timer_stop(&pim->global_scope); | |
d4a4525c | 254 | pim_bsm_frags_free(&pim->global_scope); |
361b5843 | 255 | |
d0e418b4 | 256 | for (rn = route_top(pim->global_scope.bsrp_table); rn; |
257 | rn = route_next(rn)) { | |
361b5843 | 258 | bsgrp = rn->info; |
259 | if (!bsgrp) | |
260 | continue; | |
261 | pim_free_bsgrp_data(bsgrp); | |
262 | } | |
263 | ||
4d19a911 | 264 | route_table_finish(pim->global_scope.bsrp_table); |
361b5843 | 265 | } |
266 | ||
c295e391 | 267 | static bool is_hold_time_elapsed(void *data) |
268 | { | |
269 | struct bsm_rpinfo *bsrp; | |
270 | ||
271 | bsrp = data; | |
272 | ||
273 | if (bsrp->elapse_time < bsrp->rp_holdtime) | |
274 | return false; | |
275 | else | |
276 | return true; | |
277 | } | |
278 | ||
a5164e97 | 279 | static int pim_on_g2rp_timer(struct thread *t) |
280 | { | |
c295e391 | 281 | struct bsm_rpinfo *bsrp; |
282 | struct bsm_rpinfo *bsrp_node; | |
283 | struct bsgrp_node *bsgrp_node; | |
c295e391 | 284 | struct pim_instance *pim; |
285 | struct rp_info *rp_info; | |
286 | struct route_node *rn; | |
287 | uint16_t elapse; | |
288 | struct in_addr bsrp_addr; | |
289 | ||
290 | bsrp = THREAD_ARG(t); | |
291 | THREAD_OFF(bsrp->g2rp_timer); | |
292 | bsgrp_node = bsrp->bsgrp_node; | |
293 | ||
294 | /* elapse time is the hold time of expired node */ | |
295 | elapse = bsrp->rp_holdtime; | |
296 | bsrp_addr = bsrp->rp_address; | |
297 | ||
298 | /* update elapse for all bsrp nodes */ | |
fdab2940 | 299 | frr_each_safe (bsm_rpinfos, bsgrp_node->bsrp_list, bsrp_node) { |
c295e391 | 300 | bsrp_node->elapse_time += elapse; |
301 | ||
fdab2940 DL |
302 | if (is_hold_time_elapsed(bsrp_node)) { |
303 | bsm_rpinfos_del(bsgrp_node->bsrp_list, bsrp_node); | |
304 | pim_bsm_rpinfo_free(bsrp_node); | |
305 | } | |
306 | } | |
c295e391 | 307 | |
308 | /* Get the next elected rp node */ | |
fdab2940 | 309 | bsrp = bsm_rpinfos_first(bsgrp_node->bsrp_list); |
c295e391 | 310 | pim = bsgrp_node->scope->pim; |
311 | rn = route_node_lookup(pim->rp_table, &bsgrp_node->group); | |
312 | ||
313 | if (!rn) { | |
5e81f5dd | 314 | zlog_warn("%s: Route node doesn't exist", __func__); |
c295e391 | 315 | return 0; |
316 | } | |
317 | ||
318 | rp_info = (struct rp_info *)rn->info; | |
319 | ||
320 | if (!rp_info) { | |
321 | route_unlock_node(rn); | |
322 | return 0; | |
323 | } | |
324 | ||
325 | if (rp_info->rp_src != RP_SRC_STATIC) { | |
326 | /* If new rp available, change it else delete the existing */ | |
327 | if (bsrp) { | |
328 | bsrp_addr = bsrp->rp_address; | |
329 | pim_g2rp_timer_start( | |
330 | bsrp, (bsrp->rp_holdtime - bsrp->elapse_time)); | |
331 | pim_rp_change(pim, bsrp_addr, bsgrp_node->group, | |
332 | RP_SRC_BSR); | |
333 | } else { | |
334 | pim_rp_del(pim, bsrp_addr, bsgrp_node->group, NULL, | |
335 | RP_SRC_BSR); | |
336 | } | |
337 | } | |
338 | ||
fdab2940 DL |
339 | if (!bsm_rpinfos_count(bsgrp_node->bsrp_list) |
340 | && !bsm_rpinfos_count(bsgrp_node->partial_bsrp_list)) { | |
c295e391 | 341 | pim_free_bsgrp_node(pim->global_scope.bsrp_table, |
342 | &bsgrp_node->group); | |
343 | pim_free_bsgrp_data(bsgrp_node); | |
344 | } | |
345 | ||
a5164e97 | 346 | return 0; |
347 | } | |
348 | ||
349 | static void pim_g2rp_timer_start(struct bsm_rpinfo *bsrp, int hold_time) | |
350 | { | |
351 | if (!bsrp) { | |
352 | if (PIM_DEBUG_BSM) | |
15569c58 | 353 | zlog_debug("%s : Invalid brsp(NULL).", __func__); |
a5164e97 | 354 | return; |
355 | } | |
356 | THREAD_OFF(bsrp->g2rp_timer); | |
2dbe669b | 357 | if (PIM_DEBUG_BSM) |
a5164e97 | 358 | zlog_debug( |
ee2bbf7c | 359 | "%s : starting g2rp timer for grp: %pFX - rp: %pI4 with timeout %d secs(Actual Hold time : %d secs)", |
2dbe669b | 360 | __func__, &bsrp->bsgrp_node->group, |
ee2bbf7c | 361 | &bsrp->rp_address, hold_time, |
a5164e97 | 362 | bsrp->rp_holdtime); |
a5164e97 | 363 | |
364 | thread_add_timer(router->master, pim_on_g2rp_timer, bsrp, hold_time, | |
365 | &bsrp->g2rp_timer); | |
366 | } | |
367 | ||
368 | static inline void pim_g2rp_timer_restart(struct bsm_rpinfo *bsrp, | |
369 | int hold_time) | |
370 | { | |
371 | pim_g2rp_timer_start(bsrp, hold_time); | |
372 | } | |
373 | ||
20fd30e5 | 374 | static void pim_g2rp_timer_stop(struct bsm_rpinfo *bsrp) |
375 | { | |
376 | if (!bsrp) | |
377 | return; | |
378 | ||
2dbe669b | 379 | if (PIM_DEBUG_BSM) |
ee2bbf7c | 380 | zlog_debug("%s : stopping g2rp timer for grp: %pFX - rp: %pI4", |
2dbe669b | 381 | __func__, &bsrp->bsgrp_node->group, |
ee2bbf7c | 382 | &bsrp->rp_address); |
20fd30e5 | 383 | |
384 | THREAD_OFF(bsrp->g2rp_timer); | |
385 | } | |
386 | ||
387 | static bool is_hold_time_zero(void *data) | |
388 | { | |
389 | struct bsm_rpinfo *bsrp; | |
390 | ||
391 | bsrp = data; | |
392 | ||
393 | if (bsrp->rp_holdtime) | |
394 | return false; | |
395 | else | |
396 | return true; | |
397 | } | |
398 | ||
399 | static void pim_instate_pend_list(struct bsgrp_node *bsgrp_node) | |
400 | { | |
401 | struct bsm_rpinfo *active; | |
402 | struct bsm_rpinfo *pend; | |
20fd30e5 | 403 | struct rp_info *rp_info; |
404 | struct route_node *rn; | |
405 | struct pim_instance *pim; | |
406 | struct rp_info *rp_all; | |
407 | struct prefix group_all; | |
408 | bool had_rp_node = true; | |
409 | ||
410 | pim = bsgrp_node->scope->pim; | |
fdab2940 | 411 | active = bsm_rpinfos_first(bsgrp_node->bsrp_list); |
20fd30e5 | 412 | |
413 | /* Remove nodes with hold time 0 & check if list still has a head */ | |
5f1808ac DS |
414 | frr_each_safe (bsm_rpinfos, bsgrp_node->partial_bsrp_list, pend) { |
415 | if (is_hold_time_zero(pend)) { | |
fdab2940 | 416 | bsm_rpinfos_del(bsgrp_node->partial_bsrp_list, pend); |
5f1808ac DS |
417 | pim_bsm_rpinfo_free(pend); |
418 | } | |
419 | } | |
fdab2940 DL |
420 | |
421 | pend = bsm_rpinfos_first(bsgrp_node->partial_bsrp_list); | |
20fd30e5 | 422 | |
423 | if (!str2prefix("224.0.0.0/4", &group_all)) | |
424 | return; | |
425 | ||
426 | rp_all = pim_rp_find_match_group(pim, &group_all); | |
427 | rn = route_node_lookup(pim->rp_table, &bsgrp_node->group); | |
428 | ||
429 | if (pend) | |
430 | pim_g2rp_timer_start(pend, pend->rp_holdtime); | |
431 | ||
432 | /* if rp node doesn't exist or exist but not configured(rp_all), | |
433 | * install the rp from head(if exists) of partial list. List is | |
434 | * is sorted such that head is the elected RP for the group. | |
435 | */ | |
436 | if (!rn || (prefix_same(&rp_all->group, &bsgrp_node->group) | |
437 | && pim_rpf_addr_is_inaddr_none(&rp_all->rp))) { | |
438 | if (PIM_DEBUG_BSM) | |
15569c58 | 439 | zlog_debug("%s: Route node doesn't exist", __func__); |
20fd30e5 | 440 | if (pend) |
441 | pim_rp_new(pim, pend->rp_address, bsgrp_node->group, | |
442 | NULL, RP_SRC_BSR); | |
443 | had_rp_node = false; | |
444 | } else { | |
445 | rp_info = (struct rp_info *)rn->info; | |
446 | if (!rp_info) { | |
447 | route_unlock_node(rn); | |
448 | if (pend) | |
449 | pim_rp_new(pim, pend->rp_address, | |
450 | bsgrp_node->group, NULL, RP_SRC_BSR); | |
451 | had_rp_node = false; | |
452 | } | |
453 | } | |
454 | ||
455 | /* We didn't have rp node and pending list is empty(unlikely), cleanup*/ | |
456 | if ((!had_rp_node) && (!pend)) { | |
457 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, | |
458 | &bsgrp_node->group); | |
459 | pim_free_bsgrp_data(bsgrp_node); | |
460 | return; | |
461 | } | |
462 | ||
463 | if ((had_rp_node) && (rp_info->rp_src != RP_SRC_STATIC)) { | |
464 | /* This means we searched and got rp node, needs unlock */ | |
465 | route_unlock_node(rn); | |
466 | ||
467 | if (active && pend) { | |
468 | if ((active->rp_address.s_addr | |
469 | != pend->rp_address.s_addr)) | |
470 | pim_rp_change(pim, pend->rp_address, | |
471 | bsgrp_node->group, RP_SRC_BSR); | |
472 | } | |
473 | ||
474 | /* Possible when the first BSM has group with 0 rp count */ | |
475 | if ((!active) && (!pend)) { | |
476 | if (PIM_DEBUG_BSM) { | |
477 | zlog_debug( | |
478 | "%s: Both bsrp and partial list are empty", | |
15569c58 | 479 | __func__); |
20fd30e5 | 480 | } |
481 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, | |
482 | &bsgrp_node->group); | |
483 | pim_free_bsgrp_data(bsgrp_node); | |
484 | return; | |
485 | } | |
486 | ||
487 | /* Possible when a group with 0 rp count received in BSM */ | |
488 | if ((active) && (!pend)) { | |
489 | pim_rp_del(pim, active->rp_address, bsgrp_node->group, | |
490 | NULL, RP_SRC_BSR); | |
491 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, | |
492 | &bsgrp_node->group); | |
493 | if (PIM_DEBUG_BSM) { | |
494 | zlog_debug("%s:Pend List is null,del grp node", | |
15569c58 | 495 | __func__); |
20fd30e5 | 496 | } |
497 | pim_free_bsgrp_data(bsgrp_node); | |
498 | return; | |
499 | } | |
500 | } | |
501 | ||
502 | if ((had_rp_node) && (rp_info->rp_src == RP_SRC_STATIC)) { | |
503 | /* We need to unlock rn this case */ | |
504 | route_unlock_node(rn); | |
505 | /* there is a chance that static rp exist and bsrp cleaned | |
506 | * so clean bsgrp node if pending list empty | |
507 | */ | |
508 | if (!pend) { | |
509 | if (PIM_DEBUG_BSM) | |
510 | zlog_debug( | |
511 | "%s: Partial list is empty, static rp exists", | |
15569c58 | 512 | __func__); |
20fd30e5 | 513 | pim_free_bsgrp_node(bsgrp_node->scope->bsrp_table, |
514 | &bsgrp_node->group); | |
515 | pim_free_bsgrp_data(bsgrp_node); | |
516 | return; | |
517 | } | |
518 | } | |
519 | ||
520 | /* swap the list & delete all nodes in partial list (old bsrp_list) | |
521 | * before swap | |
522 | * active is head of bsrp list | |
523 | * pend is head of partial list | |
524 | * After swap | |
525 | * active is head of partial list | |
526 | * pend is head of bsrp list | |
527 | * So check appriate head after swap and clean the new partial list | |
528 | */ | |
fdab2940 DL |
529 | bsm_rpinfos_swap_all(bsgrp_node->bsrp_list, |
530 | bsgrp_node->partial_bsrp_list); | |
20fd30e5 | 531 | |
fdab2940 | 532 | if (active) |
20fd30e5 | 533 | pim_g2rp_timer_stop(active); |
fdab2940 | 534 | pim_bsm_rpinfos_free(bsgrp_node->partial_bsrp_list); |
20fd30e5 | 535 | } |
536 | ||
5acde1cf | 537 | static bool is_preferred_bsr(struct pim_instance *pim, struct in_addr bsr, |
538 | uint32_t bsr_prio) | |
539 | { | |
540 | if (bsr.s_addr == pim->global_scope.current_bsr.s_addr) | |
541 | return true; | |
542 | ||
543 | if (bsr_prio > pim->global_scope.current_bsr_prio) | |
544 | return true; | |
545 | ||
546 | else if (bsr_prio == pim->global_scope.current_bsr_prio) { | |
e34c4619 | 547 | if (ntohl(bsr.s_addr) |
548 | >= ntohl(pim->global_scope.current_bsr.s_addr)) | |
5acde1cf | 549 | return true; |
550 | else | |
551 | return false; | |
552 | } else | |
553 | return false; | |
554 | } | |
555 | ||
556 | static void pim_bsm_update(struct pim_instance *pim, struct in_addr bsr, | |
557 | uint32_t bsr_prio) | |
558 | { | |
5acde1cf | 559 | if (bsr.s_addr != pim->global_scope.current_bsr.s_addr) { |
5f010b12 | 560 | pim_nht_bsr_del(pim, pim->global_scope.current_bsr); |
4efdb9c6 | 561 | pim_nht_bsr_add(pim, bsr); |
5acde1cf | 562 | |
5acde1cf | 563 | pim->global_scope.current_bsr = bsr; |
564 | pim->global_scope.current_bsr_first_ts = | |
565 | pim_time_monotonic_sec(); | |
566 | pim->global_scope.state = ACCEPT_PREFERRED; | |
567 | } | |
568 | pim->global_scope.current_bsr_prio = bsr_prio; | |
569 | pim->global_scope.current_bsr_last_ts = pim_time_monotonic_sec(); | |
570 | } | |
571 | ||
b09bd804 DL |
572 | void pim_bsm_clear(struct pim_instance *pim) |
573 | { | |
574 | struct route_node *rn; | |
575 | struct route_node *rpnode; | |
576 | struct bsgrp_node *bsgrp; | |
577 | struct prefix nht_p; | |
578 | struct prefix g_all; | |
579 | struct rp_info *rp_all; | |
580 | struct pim_upstream *up; | |
581 | struct rp_info *rp_info; | |
62596d9a | 582 | bool upstream_updated = false; |
b09bd804 | 583 | |
5f010b12 | 584 | pim_nht_bsr_del(pim, pim->global_scope.current_bsr); |
b09bd804 DL |
585 | |
586 | /* Reset scope zone data */ | |
587 | pim->global_scope.accept_nofwd_bsm = false; | |
588 | pim->global_scope.state = ACCEPT_ANY; | |
589 | pim->global_scope.current_bsr.s_addr = INADDR_ANY; | |
590 | pim->global_scope.current_bsr_prio = 0; | |
591 | pim->global_scope.current_bsr_first_ts = 0; | |
592 | pim->global_scope.current_bsr_last_ts = 0; | |
593 | pim->global_scope.bsm_frag_tag = 0; | |
594 | pim_bsm_frags_free(&pim->global_scope); | |
595 | ||
596 | pim_bs_timer_stop(&pim->global_scope); | |
597 | ||
598 | for (rn = route_top(pim->global_scope.bsrp_table); rn; | |
599 | rn = route_next(rn)) { | |
600 | bsgrp = rn->info; | |
601 | if (!bsgrp) | |
602 | continue; | |
603 | ||
604 | rpnode = route_node_lookup(pim->rp_table, &bsgrp->group); | |
605 | ||
606 | if (!rpnode) { | |
607 | pim_free_bsgrp_node(bsgrp->scope->bsrp_table, | |
608 | &bsgrp->group); | |
609 | pim_free_bsgrp_data(bsgrp); | |
610 | continue; | |
611 | } | |
612 | ||
613 | rp_info = (struct rp_info *)rpnode->info; | |
614 | ||
615 | if ((!rp_info) || (rp_info->rp_src != RP_SRC_BSR)) { | |
616 | pim_free_bsgrp_node(bsgrp->scope->bsrp_table, | |
617 | &bsgrp->group); | |
618 | pim_free_bsgrp_data(bsgrp); | |
619 | continue; | |
620 | } | |
621 | ||
622 | /* Deregister addr with Zebra NHT */ | |
623 | nht_p.family = AF_INET; | |
624 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
625 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
626 | ||
627 | if (PIM_DEBUG_PIM_NHT_RP) { | |
628 | zlog_debug("%s: Deregister RP addr %pFX with Zebra ", | |
629 | __func__, &nht_p); | |
630 | } | |
631 | ||
632 | pim_delete_tracked_nexthop(pim, &nht_p, NULL, rp_info); | |
633 | ||
634 | if (!str2prefix("224.0.0.0/4", &g_all)) | |
635 | return; | |
636 | ||
637 | rp_all = pim_rp_find_match_group(pim, &g_all); | |
638 | ||
639 | if (rp_all == rp_info) { | |
640 | rp_all->rp.rpf_addr.family = AF_INET; | |
641 | rp_all->rp.rpf_addr.u.prefix4.s_addr = INADDR_NONE; | |
642 | rp_all->i_am_rp = 0; | |
643 | } else { | |
644 | /* Delete the rp_info from rp-list */ | |
645 | listnode_delete(pim->rp_list, rp_info); | |
646 | ||
647 | /* Delete the rp node from rp_table */ | |
648 | rpnode->info = NULL; | |
649 | route_unlock_node(rpnode); | |
650 | route_unlock_node(rpnode); | |
651 | XFREE(MTYPE_PIM_RP, rp_info); | |
652 | } | |
653 | ||
654 | pim_free_bsgrp_node(bsgrp->scope->bsrp_table, &bsgrp->group); | |
655 | pim_free_bsgrp_data(bsgrp); | |
656 | } | |
657 | pim_rp_refresh_group_to_rp_mapping(pim); | |
658 | ||
659 | ||
660 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { | |
661 | /* Find the upstream (*, G) whose upstream address is same as | |
662 | * the RP | |
663 | */ | |
2a27f13b | 664 | if (!pim_addr_is_any(up->sg.src)) |
b09bd804 DL |
665 | continue; |
666 | ||
667 | struct prefix grp; | |
668 | struct rp_info *trp_info; | |
669 | ||
c631920c | 670 | pim_addr_to_prefix(&grp, up->sg.grp); |
b09bd804 DL |
671 | trp_info = pim_rp_find_match_group(pim, &grp); |
672 | ||
673 | /* RP not found for the group grp */ | |
674 | if (pim_rpf_addr_is_inaddr_none(&trp_info->rp)) { | |
675 | pim_upstream_rpf_clear(pim, up); | |
676 | pim_rp_set_upstream_addr(pim, &up->upstream_addr, | |
677 | up->sg.src, up->sg.grp); | |
678 | } else { | |
679 | /* RP found for the group grp */ | |
680 | pim_upstream_update(pim, up); | |
62596d9a | 681 | upstream_updated = true; |
b09bd804 DL |
682 | } |
683 | } | |
62596d9a MR |
684 | |
685 | if (upstream_updated) | |
686 | pim_zebra_update_all_interfaces(pim); | |
b09bd804 DL |
687 | } |
688 | ||
79d97386 | 689 | static bool pim_bsm_send_intf(uint8_t *buf, int len, struct interface *ifp, |
690 | struct in_addr dst_addr) | |
691 | { | |
692 | struct pim_interface *pim_ifp; | |
693 | ||
694 | pim_ifp = ifp->info; | |
695 | ||
696 | if (!pim_ifp) { | |
697 | if (PIM_DEBUG_BSM) | |
698 | zlog_debug("%s: Pim interface not available for %s", | |
15569c58 | 699 | __func__, ifp->name); |
79d97386 | 700 | return false; |
701 | } | |
702 | ||
703 | if (pim_ifp->pim_sock_fd == -1) { | |
704 | if (PIM_DEBUG_BSM) | |
705 | zlog_debug("%s: Pim sock not available for %s", | |
15569c58 | 706 | __func__, ifp->name); |
79d97386 | 707 | return false; |
708 | } | |
709 | ||
3bb29c4e DS |
710 | if (pim_msg_send(pim_ifp->pim_sock_fd, pim_ifp->primary_address, |
711 | dst_addr, buf, len, ifp->name)) { | |
712 | zlog_warn("%s: Could not send BSM message on interface: %s", | |
15569c58 | 713 | __func__, ifp->name); |
3bb29c4e DS |
714 | return false; |
715 | } | |
716 | ||
79d97386 | 717 | pim_ifp->pim_ifstat_bsm_tx++; |
718 | pim_ifp->pim->bsm_sent++; | |
719 | return true; | |
720 | } | |
721 | ||
40270c35 | 722 | static bool pim_bsm_frag_send(uint8_t *buf, uint32_t len, struct interface *ifp, |
723 | uint32_t pim_mtu, struct in_addr dst_addr, | |
724 | bool no_fwd) | |
725 | { | |
726 | struct bsmmsg_grpinfo *grpinfo, *curgrp; | |
727 | uint8_t *firstgrp_ptr; | |
728 | uint8_t *pkt; | |
729 | uint8_t *pak_start; | |
730 | uint32_t parsed_len = 0; | |
731 | uint32_t this_pkt_rem; | |
732 | uint32_t copy_byte_count; | |
733 | uint32_t this_pkt_len; | |
734 | uint8_t total_rp_cnt; | |
735 | uint8_t this_rp_cnt; | |
736 | uint8_t frag_rp_cnt; | |
737 | uint8_t rp_fit_cnt; | |
738 | bool pak_pending = false; | |
739 | ||
740 | /* MTU passed here is PIM MTU (IP MTU less IP Hdr) */ | |
741 | if (pim_mtu < (PIM_MIN_BSM_LEN)) { | |
742 | zlog_warn( | |
f79f7a7b | 743 | "%s: mtu(pim mtu: %d) size less than minimum bootstrap len", |
15569c58 | 744 | __func__, pim_mtu); |
40270c35 | 745 | if (PIM_DEBUG_BSM) |
746 | zlog_debug( | |
f79f7a7b | 747 | "%s: mtu (pim mtu:%d) less than minimum bootstrap len", |
15569c58 | 748 | __func__, pim_mtu); |
40270c35 | 749 | return false; |
750 | } | |
751 | ||
752 | pak_start = XCALLOC(MTYPE_PIM_BSM_PKT_VAR_MEM, pim_mtu); | |
753 | ||
40270c35 | 754 | pkt = pak_start; |
755 | ||
756 | /* Fill PIM header later before sending packet to calc checksum */ | |
757 | pkt += PIM_MSG_HEADER_LEN; | |
758 | buf += PIM_MSG_HEADER_LEN; | |
759 | ||
760 | /* copy bsm header to new packet at offset of pim hdr */ | |
761 | memcpy(pkt, buf, PIM_BSM_HDR_LEN); | |
762 | pkt += PIM_BSM_HDR_LEN; | |
763 | buf += PIM_BSM_HDR_LEN; | |
764 | parsed_len += (PIM_MSG_HEADER_LEN + PIM_BSM_HDR_LEN); | |
765 | ||
766 | /* Store the position of first grp ptr, which can be reused for | |
767 | * next packet to start filling group. old bsm header and pim hdr | |
768 | * remains. So need not be filled again for next packet onwards. | |
769 | */ | |
770 | firstgrp_ptr = pkt; | |
771 | ||
772 | /* we received mtu excluding IP hdr len as param | |
773 | * now this_pkt_rem is mtu excluding | |
774 | * PIM_BSM_HDR_LEN + PIM_MSG_HEADER_LEN | |
775 | */ | |
776 | this_pkt_rem = pim_mtu - (PIM_BSM_HDR_LEN + PIM_MSG_HEADER_LEN); | |
777 | ||
778 | /* For each group till the packet length parsed */ | |
779 | while (parsed_len < len) { | |
780 | /* pkt ---> fragment's current pointer | |
781 | * buf ---> input buffer's current pointer | |
782 | * mtu ---> size of the pim packet - PIM header | |
783 | * curgrp ---> current group on the fragment | |
784 | * grpinfo ---> current group on the input buffer | |
785 | * this_pkt_rem ---> bytes remaing on the current fragment | |
786 | * rp_fit_cnt ---> num of rp for current grp that | |
787 | * fits this frag | |
788 | * total_rp_cnt ---> total rp present for the group in the buf | |
789 | * frag_rp_cnt ---> no of rp for the group to be fit in | |
790 | * the frag | |
791 | * this_rp_cnt ---> how many rp have we parsed | |
792 | */ | |
793 | grpinfo = (struct bsmmsg_grpinfo *)buf; | |
794 | memcpy(pkt, buf, PIM_BSM_GRP_LEN); | |
795 | curgrp = (struct bsmmsg_grpinfo *)pkt; | |
796 | parsed_len += PIM_BSM_GRP_LEN; | |
797 | pkt += PIM_BSM_GRP_LEN; | |
798 | buf += PIM_BSM_GRP_LEN; | |
799 | this_pkt_rem -= PIM_BSM_GRP_LEN; | |
800 | ||
801 | /* initialize rp count and total_rp_cnt before the rp loop */ | |
802 | this_rp_cnt = 0; | |
803 | total_rp_cnt = grpinfo->frag_rp_count; | |
804 | ||
805 | /* Loop till all RPs for the group parsed */ | |
806 | while (this_rp_cnt < total_rp_cnt) { | |
807 | /* All RP from a group processed here. | |
808 | * group is pointed by grpinfo. | |
809 | * At this point make sure buf pointing to a RP | |
810 | * within a group | |
811 | */ | |
812 | rp_fit_cnt = this_pkt_rem / PIM_BSM_RP_LEN; | |
813 | ||
814 | /* calculate how many rp am i going to copy in | |
815 | * this frag | |
816 | */ | |
817 | if (rp_fit_cnt > (total_rp_cnt - this_rp_cnt)) | |
818 | frag_rp_cnt = total_rp_cnt - this_rp_cnt; | |
819 | else | |
820 | frag_rp_cnt = rp_fit_cnt; | |
821 | ||
822 | /* populate the frag rp count for the current grp */ | |
823 | curgrp->frag_rp_count = frag_rp_cnt; | |
824 | copy_byte_count = frag_rp_cnt * PIM_BSM_RP_LEN; | |
825 | ||
826 | /* copy all the rp that we are fitting in this | |
827 | * frag for the grp | |
828 | */ | |
829 | memcpy(pkt, buf, copy_byte_count); | |
830 | this_rp_cnt += frag_rp_cnt; | |
831 | buf += copy_byte_count; | |
832 | pkt += copy_byte_count; | |
833 | parsed_len += copy_byte_count; | |
834 | this_pkt_rem -= copy_byte_count; | |
835 | ||
836 | /* Either we couldn't fit all rp for the group or the | |
837 | * mtu reached | |
838 | */ | |
839 | if ((this_rp_cnt < total_rp_cnt) | |
840 | || (this_pkt_rem | |
841 | < (PIM_BSM_GRP_LEN + PIM_BSM_RP_LEN))) { | |
842 | /* No space to fit in more rp, send this pkt */ | |
843 | this_pkt_len = pim_mtu - this_pkt_rem; | |
844 | pim_msg_build_header(pak_start, this_pkt_len, | |
845 | PIM_MSG_TYPE_BOOTSTRAP, | |
846 | no_fwd); | |
847 | pim_bsm_send_intf(pak_start, this_pkt_len, ifp, | |
848 | dst_addr); | |
849 | ||
850 | /* Construct next fragment. Reuse old packet */ | |
851 | pkt = firstgrp_ptr; | |
852 | this_pkt_rem = pim_mtu - (PIM_BSM_HDR_LEN | |
853 | + PIM_MSG_HEADER_LEN); | |
854 | ||
855 | /* If pkt can't accomodate next group + atleast | |
856 | * one rp, we must break out of this inner loop | |
857 | * and process next RP | |
858 | */ | |
859 | if (total_rp_cnt == this_rp_cnt) | |
860 | break; | |
861 | ||
862 | /* If some more RPs for the same group pending, | |
863 | * fill grp hdr | |
864 | */ | |
865 | memcpy(pkt, (uint8_t *)grpinfo, | |
866 | PIM_BSM_GRP_LEN); | |
867 | curgrp = (struct bsmmsg_grpinfo *)pkt; | |
868 | pkt += PIM_BSM_GRP_LEN; | |
869 | this_pkt_rem -= PIM_BSM_GRP_LEN; | |
870 | pak_pending = false; | |
871 | } else { | |
872 | /* We filled something but not yet sent out */ | |
873 | pak_pending = true; | |
874 | } | |
875 | } /* while RP count */ | |
876 | } /*while parsed len */ | |
877 | ||
878 | /* Send if we have any unsent packet */ | |
879 | if (pak_pending) { | |
880 | this_pkt_len = pim_mtu - this_pkt_rem; | |
881 | pim_msg_build_header(pak_start, this_pkt_len, | |
882 | PIM_MSG_TYPE_BOOTSTRAP, no_fwd); | |
883 | pim_bsm_send_intf(pak_start, (pim_mtu - this_pkt_rem), ifp, | |
884 | dst_addr); | |
885 | } | |
886 | XFREE(MTYPE_PIM_BSM_PKT_VAR_MEM, pak_start); | |
887 | return true; | |
888 | } | |
889 | ||
79d97386 | 890 | static void pim_bsm_fwd_whole_sz(struct pim_instance *pim, uint8_t *buf, |
891 | uint32_t len, int sz) | |
892 | { | |
893 | struct interface *ifp; | |
894 | struct pim_interface *pim_ifp; | |
895 | struct in_addr dst_addr; | |
896 | uint32_t pim_mtu; | |
2951a7a4 QY |
897 | bool no_fwd = false; |
898 | bool ret = false; | |
79d97386 | 899 | |
900 | /* For now only global scope zone is supported, so send on all | |
901 | * pim interfaces in the vrf | |
902 | */ | |
903 | dst_addr = qpim_all_pim_routers_addr; | |
904 | FOR_ALL_INTERFACES (pim->vrf, ifp) { | |
905 | pim_ifp = ifp->info; | |
906 | if ((!pim_ifp) || (!pim_ifp->bsm_enable)) | |
907 | continue; | |
9255f21e | 908 | |
909 | /* | |
910 | * RFC 5059 Sec 3.4: | |
911 | * When a Bootstrap message is forwarded, it is forwarded out | |
912 | * of every multicast-capable interface that has PIM neighbors. | |
913 | * | |
914 | * So skipping pim interfaces with no neighbors. | |
915 | */ | |
916 | if (listcount(pim_ifp->pim_neighbor_list) == 0) | |
917 | continue; | |
918 | ||
79d97386 | 919 | pim_hello_require(ifp); |
920 | pim_mtu = ifp->mtu - MAX_IP_HDR_LEN; | |
921 | if (pim_mtu < len) { | |
40270c35 | 922 | ret = pim_bsm_frag_send(buf, len, ifp, pim_mtu, |
923 | dst_addr, no_fwd); | |
924 | if (PIM_DEBUG_BSM) | |
925 | zlog_debug("%s: pim_bsm_frag_send returned %s", | |
15569c58 | 926 | __func__, ret ? "TRUE" : "FALSE"); |
79d97386 | 927 | } else { |
928 | pim_msg_build_header(buf, len, PIM_MSG_TYPE_BOOTSTRAP, | |
929 | no_fwd); | |
930 | if (!pim_bsm_send_intf(buf, len, ifp, dst_addr)) { | |
931 | if (PIM_DEBUG_BSM) | |
932 | zlog_debug( | |
2951a7a4 | 933 | "%s: pim_bsm_send_intf returned false", |
15569c58 | 934 | __func__); |
79d97386 | 935 | } |
936 | } | |
937 | } | |
938 | } | |
939 | ||
6bb2ef35 | 940 | bool pim_bsm_new_nbr_fwd(struct pim_neighbor *neigh, struct interface *ifp) |
941 | { | |
942 | struct in_addr dst_addr; | |
943 | struct pim_interface *pim_ifp; | |
944 | struct bsm_scope *scope; | |
d4a4525c | 945 | struct bsm_frag *bsfrag; |
6bb2ef35 | 946 | char neigh_src_str[INET_ADDRSTRLEN]; |
947 | uint32_t pim_mtu; | |
948 | bool no_fwd = true; | |
949 | bool ret = false; | |
950 | ||
951 | if (PIM_DEBUG_BSM) { | |
952 | pim_inet4_dump("<src?>", neigh->source_addr, neigh_src_str, | |
953 | sizeof(neigh_src_str)); | |
5e81f5dd DS |
954 | zlog_debug("%s: New neighbor %s seen on %s", __func__, |
955 | neigh_src_str, ifp->name); | |
6bb2ef35 | 956 | } |
957 | ||
958 | pim_ifp = ifp->info; | |
959 | ||
960 | /* DR only forwards BSM packet */ | |
961 | if (pim_ifp->pim_dr_addr.s_addr == pim_ifp->primary_address.s_addr) { | |
962 | if (PIM_DEBUG_BSM) | |
963 | zlog_debug( | |
964 | "%s: It is not DR, so don't forward BSM packet", | |
5e81f5dd | 965 | __func__); |
6bb2ef35 | 966 | } |
967 | ||
968 | if (!pim_ifp->bsm_enable) { | |
969 | if (PIM_DEBUG_BSM) | |
5e81f5dd DS |
970 | zlog_debug("%s: BSM proc not enabled on %s", __func__, |
971 | ifp->name); | |
6bb2ef35 | 972 | return ret; |
973 | } | |
974 | ||
975 | scope = &pim_ifp->pim->global_scope; | |
976 | ||
d4a4525c | 977 | if (!bsm_frags_count(scope->bsm_frags)) { |
6bb2ef35 | 978 | if (PIM_DEBUG_BSM) |
979 | zlog_debug("%s: BSM list for the scope is empty", | |
5e81f5dd | 980 | __func__); |
6bb2ef35 | 981 | return ret; |
982 | } | |
983 | ||
984 | if (!pim_ifp->ucast_bsm_accept) { | |
985 | dst_addr = qpim_all_pim_routers_addr; | |
986 | if (PIM_DEBUG_BSM) | |
5e81f5dd DS |
987 | zlog_debug("%s: Sending BSM mcast to %s", __func__, |
988 | neigh_src_str); | |
6bb2ef35 | 989 | } else { |
990 | dst_addr = neigh->source_addr; | |
991 | if (PIM_DEBUG_BSM) | |
5e81f5dd DS |
992 | zlog_debug("%s: Sending BSM ucast to %s", __func__, |
993 | neigh_src_str); | |
6bb2ef35 | 994 | } |
995 | pim_mtu = ifp->mtu - MAX_IP_HDR_LEN; | |
996 | pim_hello_require(ifp); | |
997 | ||
d4a4525c DL |
998 | frr_each (bsm_frags, scope->bsm_frags, bsfrag) { |
999 | if (pim_mtu < bsfrag->size) { | |
1000 | ret = pim_bsm_frag_send(bsfrag->data, bsfrag->size, ifp, | |
1001 | pim_mtu, dst_addr, no_fwd); | |
6bb2ef35 | 1002 | if (!ret) { |
1003 | if (PIM_DEBUG_BSM) | |
1004 | zlog_debug( | |
1005 | "%s: pim_bsm_frag_send failed", | |
5e81f5dd | 1006 | __func__); |
6bb2ef35 | 1007 | } |
1008 | } else { | |
1009 | /* Pim header needs to be constructed */ | |
d4a4525c | 1010 | pim_msg_build_header(bsfrag->data, bsfrag->size, |
6bb2ef35 | 1011 | PIM_MSG_TYPE_BOOTSTRAP, no_fwd); |
d4a4525c DL |
1012 | ret = pim_bsm_send_intf(bsfrag->data, bsfrag->size, ifp, |
1013 | dst_addr); | |
6bb2ef35 | 1014 | if (!ret) { |
1015 | if (PIM_DEBUG_BSM) | |
1016 | zlog_debug( | |
1017 | "%s: pim_bsm_frag_send failed", | |
5e81f5dd | 1018 | __func__); |
6bb2ef35 | 1019 | } |
1020 | } | |
1021 | } | |
1022 | return ret; | |
1023 | } | |
1024 | ||
d0e418b4 | 1025 | struct bsgrp_node *pim_bsm_get_bsgrp_node(struct bsm_scope *scope, |
1026 | struct prefix *grp) | |
1027 | { | |
1028 | struct route_node *rn; | |
1029 | struct bsgrp_node *bsgrp; | |
1030 | ||
1031 | rn = route_node_lookup(scope->bsrp_table, grp); | |
1032 | if (!rn) { | |
1033 | if (PIM_DEBUG_BSM) | |
1034 | zlog_debug("%s: Route node doesn't exist for the group", | |
15569c58 | 1035 | __func__); |
d0e418b4 | 1036 | return NULL; |
1037 | } | |
1038 | bsgrp = rn->info; | |
1039 | route_unlock_node(rn); | |
1040 | ||
1041 | return bsgrp; | |
1042 | } | |
5acde1cf | 1043 | |
7b3e6ba1 | 1044 | static uint32_t hash_calc_on_grp_rp(struct prefix group, struct in_addr rp, |
1045 | uint8_t hashmasklen) | |
1046 | { | |
1047 | uint64_t temp; | |
1048 | uint32_t hash; | |
1049 | uint32_t grpaddr; | |
1050 | uint32_t rp_add; | |
1051 | uint32_t mask = 0xffffffff; | |
1052 | ||
1053 | /* mask to be made zero if hashmasklen is 0 because mask << 32 | |
1054 | * may not give 0. hashmasklen can be 0 to 32. | |
1055 | */ | |
1056 | if (hashmasklen == 0) | |
1057 | mask = 0; | |
1058 | ||
1059 | /* in_addr stores ip in big endian, hence network byte order | |
1060 | * convert to uint32 before processing hash | |
1061 | */ | |
1062 | grpaddr = ntohl(group.u.prefix4.s_addr); | |
1063 | /* Avoid shifting by 32 bit on a 32 bit register */ | |
1064 | if (hashmasklen) | |
1065 | grpaddr = grpaddr & ((mask << (32 - hashmasklen))); | |
1066 | else | |
1067 | grpaddr = grpaddr & mask; | |
1068 | rp_add = ntohl(rp.s_addr); | |
29f7fc87 DS |
1069 | temp = 1103515245 * ((1103515245 * (uint64_t)grpaddr + 12345) ^ rp_add) |
1070 | + 12345; | |
7b3e6ba1 | 1071 | hash = temp & (0x7fffffff); |
1072 | return hash; | |
1073 | } | |
1074 | ||
1075 | static bool pim_install_bsm_grp_rp(struct pim_instance *pim, | |
1076 | struct bsgrp_node *grpnode, | |
1077 | struct bsmmsg_rpinfo *rp) | |
1078 | { | |
1079 | struct bsm_rpinfo *bsm_rpinfo; | |
1080 | uint8_t hashMask_len = pim->global_scope.hashMasklen; | |
1081 | ||
1082 | /*memory allocation for bsm_rpinfo */ | |
fdab2940 | 1083 | bsm_rpinfo = XCALLOC(MTYPE_PIM_BSRP_INFO, sizeof(*bsm_rpinfo)); |
7b3e6ba1 | 1084 | |
7b3e6ba1 | 1085 | bsm_rpinfo->rp_prio = rp->rp_pri; |
1086 | bsm_rpinfo->rp_holdtime = rp->rp_holdtime; | |
1087 | memcpy(&bsm_rpinfo->rp_address, &rp->rpaddr.addr, | |
1088 | sizeof(struct in_addr)); | |
1089 | bsm_rpinfo->elapse_time = 0; | |
1090 | ||
1091 | /* Back pointer to the group node. */ | |
1092 | bsm_rpinfo->bsgrp_node = grpnode; | |
1093 | ||
1094 | /* update hash for this rp node */ | |
1095 | bsm_rpinfo->hash = hash_calc_on_grp_rp(grpnode->group, rp->rpaddr.addr, | |
1096 | hashMask_len); | |
fdab2940 | 1097 | if (bsm_rpinfos_add(grpnode->partial_bsrp_list, bsm_rpinfo) == NULL) { |
7b3e6ba1 | 1098 | if (PIM_DEBUG_BSM) |
1099 | zlog_debug( | |
63efca0e | 1100 | "%s, bs_rpinfo node added to the partial bs_rplist.", |
15569c58 | 1101 | __func__); |
7b3e6ba1 | 1102 | return true; |
1103 | } | |
1104 | ||
1105 | if (PIM_DEBUG_BSM) | |
63efca0e | 1106 | zlog_debug("%s: list node not added", __func__); |
7b3e6ba1 | 1107 | |
fdab2940 | 1108 | XFREE(MTYPE_PIM_BSRP_INFO, bsm_rpinfo); |
7b3e6ba1 | 1109 | return false; |
1110 | } | |
1111 | ||
1112 | static void pim_update_pending_rp_cnt(struct bsm_scope *sz, | |
1113 | struct bsgrp_node *bsgrp, | |
1114 | uint16_t bsm_frag_tag, | |
1115 | uint32_t total_rp_count) | |
1116 | { | |
1117 | if (bsgrp->pend_rp_cnt) { | |
1118 | /* received bsm is different packet , | |
1119 | * it is not same fragment. | |
1120 | */ | |
1121 | if (bsm_frag_tag != bsgrp->frag_tag) { | |
1122 | if (PIM_DEBUG_BSM) | |
1123 | zlog_debug( | |
63efca0e | 1124 | "%s,Received a new BSM ,so clear the pending bs_rpinfo list.", |
15569c58 | 1125 | __func__); |
fdab2940 | 1126 | pim_bsm_rpinfos_free(bsgrp->partial_bsrp_list); |
7b3e6ba1 | 1127 | bsgrp->pend_rp_cnt = total_rp_count; |
1128 | } | |
1129 | } else | |
1130 | bsgrp->pend_rp_cnt = total_rp_count; | |
1131 | ||
1132 | bsgrp->frag_tag = bsm_frag_tag; | |
1133 | } | |
1134 | ||
1135 | /* Parsing BSR packet and adding to partial list of corresponding bsgrp node */ | |
1136 | static bool pim_bsm_parse_install_g2rp(struct bsm_scope *scope, uint8_t *buf, | |
1137 | int buflen, uint16_t bsm_frag_tag) | |
1138 | { | |
1139 | struct bsmmsg_grpinfo grpinfo; | |
1140 | struct bsmmsg_rpinfo rpinfo; | |
1141 | struct prefix group; | |
1142 | struct bsgrp_node *bsgrp = NULL; | |
1143 | int frag_rp_cnt = 0; | |
1144 | int offset = 0; | |
1145 | int ins_count = 0; | |
1146 | ||
1147 | while (buflen > offset) { | |
b1945363 DS |
1148 | if (offset + (int)sizeof(struct bsmmsg_grpinfo) > buflen) { |
1149 | if (PIM_DEBUG_BSM) | |
1150 | zlog_debug( | |
1151 | "%s: buflen received %d is less than the internal data structure of the packet would suggest", | |
15569c58 | 1152 | __func__, buflen); |
b1945363 DS |
1153 | return false; |
1154 | } | |
7b3e6ba1 | 1155 | /* Extract Group tlv from BSM */ |
1156 | memcpy(&grpinfo, buf, sizeof(struct bsmmsg_grpinfo)); | |
1157 | ||
1158 | if (PIM_DEBUG_BSM) { | |
1159 | char grp_str[INET_ADDRSTRLEN]; | |
1160 | ||
1161 | pim_inet4_dump("<Group?>", grpinfo.group.addr, grp_str, | |
1162 | sizeof(grp_str)); | |
1163 | zlog_debug( | |
63efca0e | 1164 | "%s, Group %s Rpcount:%d Fragment-Rp-count:%d", |
15569c58 | 1165 | __func__, grp_str, grpinfo.rp_count, |
7b3e6ba1 | 1166 | grpinfo.frag_rp_count); |
1167 | } | |
1168 | ||
1169 | buf += sizeof(struct bsmmsg_grpinfo); | |
1170 | offset += sizeof(struct bsmmsg_grpinfo); | |
1171 | ||
7b3e6ba1 | 1172 | group.family = AF_INET; |
b1945363 DS |
1173 | if (grpinfo.group.mask > IPV4_MAX_BITLEN) { |
1174 | if (PIM_DEBUG_BSM) | |
15569c58 DA |
1175 | zlog_debug( |
1176 | "%s, v4 prefix length specified: %d is too long", | |
1177 | __func__, grpinfo.group.mask); | |
b1945363 DS |
1178 | return false; |
1179 | } | |
7b3e6ba1 | 1180 | group.prefixlen = grpinfo.group.mask; |
1181 | group.u.prefix4.s_addr = grpinfo.group.addr.s_addr; | |
1182 | ||
1183 | /* Get the Group node for the BSM rp table */ | |
1184 | bsgrp = pim_bsm_get_bsgrp_node(scope, &group); | |
1185 | ||
43038bd5 DL |
1186 | if (grpinfo.rp_count == 0) { |
1187 | struct bsm_rpinfo *old_rpinfo; | |
1188 | ||
1189 | /* BSR explicitly no longer has RPs for this group */ | |
1190 | if (!bsgrp) | |
1191 | continue; | |
1192 | ||
1193 | if (PIM_DEBUG_BSM) { | |
1194 | char grp_str[INET_ADDRSTRLEN]; | |
1195 | ||
1196 | pim_inet4_dump("<Group?>", grpinfo.group.addr, | |
1197 | grp_str, sizeof(grp_str)); | |
1198 | zlog_debug("%s, Rp count is zero for group: %s", | |
1199 | __func__, grp_str); | |
1200 | } | |
1201 | ||
1202 | old_rpinfo = bsm_rpinfos_first(bsgrp->bsrp_list); | |
1203 | if (old_rpinfo) | |
1204 | pim_rp_del(scope->pim, old_rpinfo->rp_address, | |
1205 | group, NULL, RP_SRC_BSR); | |
1206 | ||
1207 | pim_free_bsgrp_node(scope->bsrp_table, &bsgrp->group); | |
1208 | pim_free_bsgrp_data(bsgrp); | |
1209 | continue; | |
1210 | } | |
1211 | ||
7b3e6ba1 | 1212 | if (!bsgrp) { |
1213 | if (PIM_DEBUG_BSM) | |
63efca0e DL |
1214 | zlog_debug("%s, Create new BSM Group node.", |
1215 | __func__); | |
7b3e6ba1 | 1216 | |
1217 | /* create a new node to be added to the tree. */ | |
1218 | bsgrp = pim_bsm_new_bsgrp_node(scope->bsrp_table, | |
1219 | &group); | |
1220 | ||
1221 | if (!bsgrp) { | |
1222 | zlog_debug( | |
63efca0e | 1223 | "%s, Failed to get the BSM group node.", |
15569c58 | 1224 | __func__); |
7b3e6ba1 | 1225 | continue; |
1226 | } | |
1227 | ||
1228 | bsgrp->scope = scope; | |
1229 | } | |
1230 | ||
1231 | pim_update_pending_rp_cnt(scope, bsgrp, bsm_frag_tag, | |
1232 | grpinfo.rp_count); | |
1233 | frag_rp_cnt = grpinfo.frag_rp_count; | |
1234 | ins_count = 0; | |
1235 | ||
1236 | while (frag_rp_cnt--) { | |
b1945363 DS |
1237 | if (offset + (int)sizeof(struct bsmmsg_rpinfo) |
1238 | > buflen) { | |
1239 | if (PIM_DEBUG_BSM) | |
1240 | zlog_debug( | |
1241 | "%s, buflen received: %u is less than the internal data structure of the packet would suggest", | |
15569c58 | 1242 | __func__, buflen); |
b1945363 DS |
1243 | return false; |
1244 | } | |
1245 | ||
7b3e6ba1 | 1246 | /* Extract RP address tlv from BSM */ |
1247 | memcpy(&rpinfo, buf, sizeof(struct bsmmsg_rpinfo)); | |
1248 | rpinfo.rp_holdtime = ntohs(rpinfo.rp_holdtime); | |
1249 | buf += sizeof(struct bsmmsg_rpinfo); | |
1250 | offset += sizeof(struct bsmmsg_rpinfo); | |
1251 | ||
1252 | if (PIM_DEBUG_BSM) { | |
1253 | char rp_str[INET_ADDRSTRLEN]; | |
1254 | ||
1255 | pim_inet4_dump("<Rpaddr?>", rpinfo.rpaddr.addr, | |
1256 | rp_str, sizeof(rp_str)); | |
1257 | zlog_debug( | |
63efca0e | 1258 | "%s, Rp address - %s; pri:%d hold:%d", |
15569c58 DA |
1259 | __func__, rp_str, rpinfo.rp_pri, |
1260 | rpinfo.rp_holdtime); | |
7b3e6ba1 | 1261 | } |
1262 | ||
1263 | /* Call Install api to update grp-rp mappings */ | |
1264 | if (pim_install_bsm_grp_rp(scope->pim, bsgrp, &rpinfo)) | |
1265 | ins_count++; | |
1266 | } | |
1267 | ||
1268 | bsgrp->pend_rp_cnt -= ins_count; | |
1269 | ||
1270 | if (!bsgrp->pend_rp_cnt) { | |
1271 | if (PIM_DEBUG_BSM) | |
1272 | zlog_debug( | |
1273 | "%s, Recvd all the rps for this group, so bsrp list with penidng rp list.", | |
15569c58 | 1274 | __func__); |
20fd30e5 | 1275 | /* replace the bsrp_list with pending list */ |
1276 | pim_instate_pend_list(bsgrp); | |
7b3e6ba1 | 1277 | } |
1278 | } | |
1279 | return true; | |
1280 | } | |
1281 | ||
5acde1cf | 1282 | int pim_bsm_process(struct interface *ifp, struct ip *ip_hdr, uint8_t *buf, |
1283 | uint32_t buf_size, bool no_fwd) | |
1284 | { | |
1285 | struct bsm_hdr *bshdr; | |
79d97386 | 1286 | int sz = PIM_GBL_SZ_ID; |
5acde1cf | 1287 | struct bsmmsg_grpinfo *msg_grp; |
1288 | struct pim_interface *pim_ifp = NULL; | |
d4a4525c | 1289 | struct bsm_frag *bsfrag; |
5acde1cf | 1290 | struct pim_instance *pim; |
1291 | char bsr_str[INET_ADDRSTRLEN]; | |
1292 | uint16_t frag_tag; | |
2951a7a4 | 1293 | bool empty_bsm = false; |
5acde1cf | 1294 | |
1295 | /* BSM Packet acceptance validation */ | |
1296 | pim_ifp = ifp->info; | |
1297 | if (!pim_ifp) { | |
1298 | if (PIM_DEBUG_BSM) | |
1299 | zlog_debug("%s: multicast not enabled on interface %s", | |
15569c58 | 1300 | __func__, ifp->name); |
5acde1cf | 1301 | return -1; |
1302 | } | |
1303 | ||
1304 | pim_ifp->pim_ifstat_bsm_rx++; | |
1305 | pim = pim_ifp->pim; | |
1306 | pim->bsm_rcvd++; | |
1307 | ||
1308 | /* Drop if bsm processing is disabled on interface */ | |
1309 | if (!pim_ifp->bsm_enable) { | |
15569c58 DA |
1310 | zlog_warn("%s: BSM not enabled on interface %s", __func__, |
1311 | ifp->name); | |
5acde1cf | 1312 | pim_ifp->pim_ifstat_bsm_cfg_miss++; |
1313 | pim->bsm_dropped++; | |
1314 | return -1; | |
1315 | } | |
1316 | ||
d83a854b | 1317 | if (buf_size < (PIM_MSG_HEADER_LEN + sizeof(struct bsm_hdr))) { |
b1945363 | 1318 | if (PIM_DEBUG_BSM) |
15569c58 DA |
1319 | zlog_debug( |
1320 | "%s: received buffer length of %d which is too small to properly decode", | |
1321 | __func__, buf_size); | |
b1945363 DS |
1322 | return -1; |
1323 | } | |
1324 | ||
5acde1cf | 1325 | bshdr = (struct bsm_hdr *)(buf + PIM_MSG_HEADER_LEN); |
1326 | pim_inet4_dump("<bsr?>", bshdr->bsr_addr.addr, bsr_str, | |
1327 | sizeof(bsr_str)); | |
12256b84 | 1328 | if (bshdr->hm_len > IPV4_MAX_BITLEN) { |
6cde4b45 | 1329 | zlog_warn("Bad hashmask length for IPv4; got %hhu, expected value in range 0-32", |
817f8933 QY |
1330 | bshdr->hm_len); |
1331 | pim->bsm_dropped++; | |
1332 | return -1; | |
1333 | } | |
5acde1cf | 1334 | pim->global_scope.hashMasklen = bshdr->hm_len; |
1335 | frag_tag = ntohs(bshdr->frag_tag); | |
1336 | ||
1337 | /* Identify empty BSM */ | |
1338 | if ((buf_size - PIM_BSM_HDR_LEN - PIM_MSG_HEADER_LEN) < PIM_BSM_GRP_LEN) | |
1339 | empty_bsm = true; | |
1340 | ||
1341 | if (!empty_bsm) { | |
1342 | msg_grp = (struct bsmmsg_grpinfo *)(buf + PIM_MSG_HEADER_LEN | |
1343 | + PIM_BSM_HDR_LEN); | |
1344 | /* Currently we don't support scope zoned BSM */ | |
1345 | if (msg_grp->group.sz) { | |
1346 | if (PIM_DEBUG_BSM) | |
1347 | zlog_debug( | |
1348 | "%s : Administratively scoped range BSM received", | |
15569c58 | 1349 | __func__); |
5acde1cf | 1350 | pim_ifp->pim_ifstat_bsm_invalid_sz++; |
1351 | pim->bsm_dropped++; | |
1352 | return -1; | |
1353 | } | |
1354 | } | |
1355 | ||
1356 | /* Drop if bsr is not preferred bsr */ | |
1357 | if (!is_preferred_bsr(pim, bshdr->bsr_addr.addr, bshdr->bsr_prio)) { | |
1358 | if (PIM_DEBUG_BSM) | |
1359 | zlog_debug("%s : Received a non-preferred BSM", | |
15569c58 | 1360 | __func__); |
5acde1cf | 1361 | pim->bsm_dropped++; |
1362 | return -1; | |
1363 | } | |
1364 | ||
1365 | if (no_fwd) { | |
1366 | /* only accept no-forward BSM if quick refresh on startup */ | |
1367 | if ((pim->global_scope.accept_nofwd_bsm) | |
1368 | || (frag_tag == pim->global_scope.bsm_frag_tag)) { | |
1369 | pim->global_scope.accept_nofwd_bsm = false; | |
1370 | } else { | |
1371 | if (PIM_DEBUG_BSM) | |
1372 | zlog_debug( | |
1373 | "%s : nofwd_bsm received on %s when accpt_nofwd_bsm false", | |
15569c58 | 1374 | __func__, bsr_str); |
5acde1cf | 1375 | pim->bsm_dropped++; |
1376 | pim_ifp->pim_ifstat_ucast_bsm_cfg_miss++; | |
1377 | return -1; | |
1378 | } | |
1379 | } | |
1380 | ||
5acde1cf | 1381 | if (ip_hdr->ip_dst.s_addr == qpim_all_pim_routers_addr.s_addr) { |
4efdb9c6 DL |
1382 | /* Multicast BSMs are only accepted if source interface & IP |
1383 | * match RPF towards the BSR's IP address, or they have | |
1384 | * no-forward set | |
1385 | */ | |
1386 | if (!no_fwd | |
1387 | && !pim_nht_bsr_rpf_check(pim, bshdr->bsr_addr.addr, ifp, | |
1388 | ip_hdr->ip_src)) { | |
1389 | if (PIM_DEBUG_BSM) | |
1390 | zlog_debug( | |
1391 | "BSM check: RPF to BSR %s is not %pI4%%%s", | |
1392 | bsr_str, &ip_hdr->ip_src, ifp->name); | |
1393 | pim->bsm_dropped++; | |
1394 | return -1; | |
5acde1cf | 1395 | } |
1e9044be DL |
1396 | } else if (if_address_is_local(&ip_hdr->ip_dst, AF_INET, |
1397 | pim->vrf->vrf_id)) { | |
5acde1cf | 1398 | /* Unicast BSM received - if ucast bsm not enabled on |
1399 | * the interface, drop it | |
1400 | */ | |
1401 | if (!pim_ifp->ucast_bsm_accept) { | |
1402 | if (PIM_DEBUG_BSM) | |
1403 | zlog_debug( | |
1404 | "%s : Unicast BSM not enabled on interface %s", | |
15569c58 | 1405 | __func__, ifp->name); |
5acde1cf | 1406 | pim_ifp->pim_ifstat_ucast_bsm_cfg_miss++; |
1407 | pim->bsm_dropped++; | |
1408 | return -1; | |
1409 | } | |
1410 | ||
1411 | } else { | |
1412 | if (PIM_DEBUG_BSM) | |
1413 | zlog_debug("%s : Invalid destination address", | |
15569c58 | 1414 | __func__); |
5acde1cf | 1415 | pim->bsm_dropped++; |
1416 | return -1; | |
1417 | } | |
1418 | ||
1419 | if (empty_bsm) { | |
1420 | if (PIM_DEBUG_BSM) | |
15569c58 | 1421 | zlog_debug("%s : Empty Pref BSM received", __func__); |
5acde1cf | 1422 | } |
7b3e6ba1 | 1423 | /* Parse Update bsm rp table and install/uninstall rp if required */ |
1424 | if (!pim_bsm_parse_install_g2rp( | |
1425 | &pim_ifp->pim->global_scope, | |
1426 | (buf + PIM_BSM_HDR_LEN + PIM_MSG_HEADER_LEN), | |
1427 | (buf_size - PIM_BSM_HDR_LEN - PIM_MSG_HEADER_LEN), | |
1428 | frag_tag)) { | |
1429 | if (PIM_DEBUG_BSM) { | |
63efca0e | 1430 | zlog_debug("%s, Parsing BSM failed.", __func__); |
7b3e6ba1 | 1431 | } |
1432 | pim->bsm_dropped++; | |
1433 | return -1; | |
1434 | } | |
5acde1cf | 1435 | /* Restart the bootstrap timer */ |
1436 | pim_bs_timer_restart(&pim_ifp->pim->global_scope, | |
1437 | PIM_BSR_DEFAULT_TIMEOUT); | |
1438 | ||
1439 | /* If new BSM received, clear the old bsm database */ | |
1440 | if (pim_ifp->pim->global_scope.bsm_frag_tag != frag_tag) { | |
1441 | if (PIM_DEBUG_BSM) { | |
1442 | zlog_debug("%s: Current frag tag: %d Frag teg rcvd: %d", | |
15569c58 | 1443 | __func__, |
5acde1cf | 1444 | pim_ifp->pim->global_scope.bsm_frag_tag, |
1445 | frag_tag); | |
1446 | } | |
d4a4525c | 1447 | pim_bsm_frags_free(&pim_ifp->pim->global_scope); |
5acde1cf | 1448 | pim_ifp->pim->global_scope.bsm_frag_tag = frag_tag; |
1449 | } | |
1450 | ||
1451 | /* update the scope information from bsm */ | |
1452 | pim_bsm_update(pim, bshdr->bsr_addr.addr, bshdr->bsr_prio); | |
79d97386 | 1453 | |
1454 | if (!no_fwd) { | |
1455 | pim_bsm_fwd_whole_sz(pim_ifp->pim, buf, buf_size, sz); | |
d4a4525c DL |
1456 | bsfrag = XCALLOC(MTYPE_PIM_BSM_FRAG, |
1457 | sizeof(struct bsm_frag) + buf_size); | |
79d97386 | 1458 | |
d4a4525c DL |
1459 | bsfrag->size = buf_size; |
1460 | memcpy(bsfrag->data, buf, buf_size); | |
1461 | bsm_frags_add_tail(pim_ifp->pim->global_scope.bsm_frags, | |
1462 | bsfrag); | |
79d97386 | 1463 | } |
1464 | ||
5acde1cf | 1465 | return 0; |
1466 | } |