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Commit | Line | Data |
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38c848c9 DS |
1 | |
2 | ||
12e41d03 | 3 | /* |
896014f4 DL |
4 | * PIM for Quagga |
5 | * Copyright (C) 2008 Everton da Silva Marques | |
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 along | |
18 | * with this program; see the file COPYING; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
12e41d03 DL |
21 | |
22 | #include <zebra.h> | |
23 | ||
24 | #include "log.h" | |
25 | #include "prefix.h" | |
744d91b3 | 26 | #include "if.h" |
dfe43e25 DW |
27 | #include "vty.h" |
28 | #include "plist.h" | |
12e41d03 DL |
29 | |
30 | #include "pimd.h" | |
31 | #include "pim_str.h" | |
32 | #include "pim_tlv.h" | |
33 | #include "pim_msg.h" | |
34 | #include "pim_pim.h" | |
35 | #include "pim_join.h" | |
3667b0bc | 36 | #include "pim_oil.h" |
12e41d03 DL |
37 | #include "pim_iface.h" |
38 | #include "pim_hello.h" | |
39 | #include "pim_ifchannel.h" | |
6c629103 DS |
40 | #include "pim_rpf.h" |
41 | #include "pim_rp.h" | |
982bff89 | 42 | #include "pim_jp_agg.h" |
b0f525a8 | 43 | #include "pim_util.h" |
34abbcc4 | 44 | #include "pim_ssm.h" |
12e41d03 | 45 | |
d62a17ae | 46 | static void on_trace(const char *label, struct interface *ifp, |
47 | struct in_addr src) | |
12e41d03 | 48 | { |
d62a17ae | 49 | if (PIM_DEBUG_PIM_TRACE) { |
50 | char src_str[INET_ADDRSTRLEN]; | |
51 | pim_inet4_dump("<src?>", src, src_str, sizeof(src_str)); | |
52 | zlog_debug("%s: from %s on %s", label, src_str, ifp->name); | |
53 | } | |
12e41d03 DL |
54 | } |
55 | ||
d62a17ae | 56 | static void recv_join(struct interface *ifp, struct pim_neighbor *neigh, |
57 | uint16_t holdtime, struct in_addr upstream, | |
6fff2cc6 | 58 | pim_sgaddr *sg, uint8_t source_flags) |
12e41d03 | 59 | { |
d62a17ae | 60 | struct pim_interface *pim_ifp = NULL; |
61 | ||
62 | if (PIM_DEBUG_PIM_TRACE) { | |
63 | char up_str[INET_ADDRSTRLEN]; | |
64 | char neigh_str[INET_ADDRSTRLEN]; | |
65 | pim_inet4_dump("<upstream?>", upstream, up_str, sizeof(up_str)); | |
66 | pim_inet4_dump("<neigh?>", neigh->source_addr, neigh_str, | |
67 | sizeof(neigh_str)); | |
98a81d2b DL |
68 | zlog_debug("%s: join (S,G)=%pSG rpt=%d wc=%d upstream=%s holdtime=%d from %s on %s", |
69 | __func__, sg, | |
70 | !!(source_flags & PIM_RPT_BIT_MASK), | |
71 | !!(source_flags & PIM_WILDCARD_BIT_MASK), up_str, | |
72 | holdtime, neigh_str, ifp->name); | |
d62a17ae | 73 | } |
74 | ||
75 | pim_ifp = ifp->info; | |
df5dfb77 | 76 | assert(pim_ifp); |
d62a17ae | 77 | |
78 | ++pim_ifp->pim_ifstat_join_recv; | |
79 | ||
80 | /* | |
81 | * If the RPT and WC are set it's a (*,G) | |
82 | * and the source is the RP | |
83 | */ | |
84 | if ((source_flags & PIM_RPT_BIT_MASK) | |
85 | && (source_flags & PIM_WILDCARD_BIT_MASK)) { | |
fec883d9 | 86 | struct pim_rpf *rp = RP(pim_ifp->pim, sg->grp); |
d62a17ae | 87 | |
b1945363 | 88 | if (!rp) { |
6fff2cc6 DL |
89 | zlog_warn("%s: Lookup of RP failed for %pSG", __func__, |
90 | sg); | |
b1945363 DS |
91 | return; |
92 | } | |
d62a17ae | 93 | /* |
94 | * If the RP sent in the message is not | |
95 | * our RP for the group, drop the message | |
96 | */ | |
a57103e9 | 97 | if (sg->src.s_addr != rp->rpf_addr.u.prefix4.s_addr) { |
a57103e9 | 98 | char local_rp[INET_ADDRSTRLEN]; |
a57103e9 DS |
99 | pim_inet4_dump("<local?>", rp->rpf_addr.u.prefix4, |
100 | local_rp, sizeof(local_rp)); | |
15569c58 | 101 | zlog_warn( |
8e8be741 DL |
102 | "%s: Specified RP(%pPAs) in join is different than our configured RP(%s)", |
103 | __func__, &sg->src, local_rp); | |
d62a17ae | 104 | return; |
a57103e9 | 105 | } |
d62a17ae | 106 | |
34abbcc4 SG |
107 | if (pim_is_grp_ssm(pim_ifp->pim, sg->grp)) { |
108 | zlog_warn( | |
6d7bf748 | 109 | "%s: Specified Group(%pPA) in join is now in SSM, not allowed to create PIM state", |
38c848c9 | 110 | __func__, &sg->grp); |
34abbcc4 SG |
111 | return; |
112 | } | |
113 | ||
bca160c6 | 114 | sg->src = PIMADDR_ANY; |
d62a17ae | 115 | } |
116 | ||
117 | /* Restart join expiry timer */ | |
118 | pim_ifchannel_join_add(ifp, neigh->source_addr, upstream, sg, | |
119 | source_flags, holdtime); | |
12e41d03 DL |
120 | } |
121 | ||
d62a17ae | 122 | static void recv_prune(struct interface *ifp, struct pim_neighbor *neigh, |
123 | uint16_t holdtime, struct in_addr upstream, | |
6fff2cc6 | 124 | pim_sgaddr *sg, uint8_t source_flags) |
12e41d03 | 125 | { |
d62a17ae | 126 | struct pim_interface *pim_ifp = NULL; |
127 | ||
128 | if (PIM_DEBUG_PIM_TRACE) { | |
129 | char up_str[INET_ADDRSTRLEN]; | |
130 | char neigh_str[INET_ADDRSTRLEN]; | |
131 | pim_inet4_dump("<upstream?>", upstream, up_str, sizeof(up_str)); | |
132 | pim_inet4_dump("<neigh?>", neigh->source_addr, neigh_str, | |
133 | sizeof(neigh_str)); | |
98a81d2b DL |
134 | zlog_debug("%s: prune (S,G)=%pSG rpt=%d wc=%d upstream=%s holdtime=%d from %s on %s", |
135 | __func__, sg, | |
136 | source_flags & PIM_RPT_BIT_MASK, | |
137 | source_flags & PIM_WILDCARD_BIT_MASK, up_str, | |
138 | holdtime, | |
139 | neigh_str, ifp->name); | |
d62a17ae | 140 | } |
141 | ||
142 | pim_ifp = ifp->info; | |
df5dfb77 | 143 | assert(pim_ifp); |
d62a17ae | 144 | |
145 | ++pim_ifp->pim_ifstat_prune_recv; | |
146 | ||
147 | if ((source_flags & PIM_RPT_BIT_MASK) | |
148 | && (source_flags & PIM_WILDCARD_BIT_MASK)) { | |
5c777da8 | 149 | /* |
150 | * RFC 4601 Section 4.5.2: | |
151 | * Received Prune(*,G) messages are processed even if the | |
152 | * RP in the message does not match RP(G). | |
153 | */ | |
8e8be741 DL |
154 | if (PIM_DEBUG_PIM_TRACE) |
155 | zlog_debug("%s: Prune received with RP(%pPAs) for %pSG", | |
156 | __func__, &sg->src, sg); | |
d62a17ae | 157 | |
bca160c6 | 158 | sg->src = PIMADDR_ANY; |
d62a17ae | 159 | } |
160 | ||
161 | pim_ifchannel_prune(ifp, upstream, sg, source_flags, holdtime); | |
12e41d03 DL |
162 | } |
163 | ||
d62a17ae | 164 | int pim_joinprune_recv(struct interface *ifp, struct pim_neighbor *neigh, |
165 | struct in_addr src_addr, uint8_t *tlv_buf, | |
166 | int tlv_buf_size) | |
12e41d03 | 167 | { |
d62a17ae | 168 | struct prefix msg_upstream_addr; |
b0f525a8 | 169 | struct pim_interface *pim_ifp; |
d62a17ae | 170 | uint8_t msg_num_groups; |
171 | uint16_t msg_holdtime; | |
172 | int addr_offset; | |
173 | uint8_t *buf; | |
174 | uint8_t *pastend; | |
175 | int remain; | |
176 | int group; | |
fa8c500f SP |
177 | struct pim_ifchannel *child = NULL; |
178 | struct listnode *ch_node, *nch_node; | |
d62a17ae | 179 | |
180 | buf = tlv_buf; | |
181 | pastend = tlv_buf + tlv_buf_size; | |
b0f525a8 | 182 | pim_ifp = ifp->info; |
d62a17ae | 183 | |
184 | /* | |
185 | Parse ucast addr | |
186 | */ | |
187 | addr_offset = | |
188 | pim_parse_addr_ucast(&msg_upstream_addr, buf, pastend - buf); | |
189 | if (addr_offset < 1) { | |
190 | char src_str[INET_ADDRSTRLEN]; | |
191 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); | |
192 | zlog_warn("%s: pim_parse_addr_ucast() failure: from %s on %s", | |
15569c58 | 193 | __func__, src_str, ifp->name); |
d62a17ae | 194 | return -1; |
195 | } | |
196 | buf += addr_offset; | |
197 | ||
198 | /* | |
199 | Check upstream address family | |
200 | */ | |
201 | if (msg_upstream_addr.family != AF_INET) { | |
fb9670aa DS |
202 | char src_str[INET_ADDRSTRLEN]; |
203 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); | |
15569c58 DA |
204 | zlog_warn( |
205 | "%s: ignoring join/prune directed to unexpected addr family=%d from %s on %s", | |
206 | __func__, msg_upstream_addr.family, src_str, ifp->name); | |
d62a17ae | 207 | return -2; |
208 | } | |
209 | ||
210 | remain = pastend - buf; | |
211 | if (remain < 4) { | |
212 | char src_str[INET_ADDRSTRLEN]; | |
213 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); | |
214 | zlog_warn( | |
215 | "%s: short join/prune message buffer for group list: size=%d minimum=%d from %s on %s", | |
15569c58 | 216 | __func__, remain, 4, src_str, ifp->name); |
d62a17ae | 217 | return -4; |
218 | } | |
219 | ||
220 | ++buf; /* skip reserved byte */ | |
221 | msg_num_groups = *(const uint8_t *)buf; | |
222 | ++buf; | |
223 | msg_holdtime = ntohs(*(const uint16_t *)buf); | |
224 | ++buf; | |
225 | ++buf; | |
226 | ||
227 | if (PIM_DEBUG_PIM_J_P) { | |
228 | char src_str[INET_ADDRSTRLEN]; | |
229 | char upstream_str[INET_ADDRSTRLEN]; | |
230 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); | |
231 | pim_inet4_dump("<addr?>", msg_upstream_addr.u.prefix4, | |
232 | upstream_str, sizeof(upstream_str)); | |
233 | zlog_debug( | |
234 | "%s: join/prune upstream=%s groups=%d holdtime=%d from %s on %s", | |
15569c58 DA |
235 | __func__, upstream_str, msg_num_groups, msg_holdtime, |
236 | src_str, ifp->name); | |
d62a17ae | 237 | } |
238 | ||
239 | /* Scan groups */ | |
240 | for (group = 0; group < msg_num_groups; ++group) { | |
6fff2cc6 | 241 | pim_sgaddr sg; |
d62a17ae | 242 | uint8_t msg_source_flags; |
243 | uint16_t msg_num_joined_sources; | |
244 | uint16_t msg_num_pruned_sources; | |
245 | int source; | |
246 | struct pim_ifchannel *starg_ch = NULL, *sg_ch = NULL; | |
b0f525a8 | 247 | bool filtered = false; |
d62a17ae | 248 | |
6fff2cc6 | 249 | memset(&sg, 0, sizeof(sg)); |
d62a17ae | 250 | addr_offset = pim_parse_addr_group(&sg, buf, pastend - buf); |
251 | if (addr_offset < 1) { | |
252 | return -5; | |
253 | } | |
254 | buf += addr_offset; | |
255 | ||
256 | remain = pastend - buf; | |
257 | if (remain < 4) { | |
258 | char src_str[INET_ADDRSTRLEN]; | |
259 | pim_inet4_dump("<src?>", src_addr, src_str, | |
260 | sizeof(src_str)); | |
261 | zlog_warn( | |
262 | "%s: short join/prune buffer for source list: size=%d minimum=%d from %s on %s", | |
15569c58 | 263 | __func__, remain, 4, src_str, ifp->name); |
d62a17ae | 264 | return -6; |
265 | } | |
266 | ||
267 | msg_num_joined_sources = ntohs(*(const uint16_t *)buf); | |
268 | buf += 2; | |
269 | msg_num_pruned_sources = ntohs(*(const uint16_t *)buf); | |
270 | buf += 2; | |
271 | ||
272 | if (PIM_DEBUG_PIM_J_P) { | |
273 | char src_str[INET_ADDRSTRLEN]; | |
274 | char upstream_str[INET_ADDRSTRLEN]; | |
d62a17ae | 275 | pim_inet4_dump("<src?>", src_addr, src_str, |
276 | sizeof(src_str)); | |
277 | pim_inet4_dump("<addr?>", msg_upstream_addr.u.prefix4, | |
278 | upstream_str, sizeof(upstream_str)); | |
fb9670aa | 279 | zlog_debug( |
8e8be741 DL |
280 | "%s: join/prune upstream=%s group=%pPA/32 join_src=%d prune_src=%d from %s on %s", |
281 | __func__, upstream_str, &sg.grp, | |
d62a17ae | 282 | msg_num_joined_sources, msg_num_pruned_sources, |
283 | src_str, ifp->name); | |
284 | } | |
285 | ||
b0f525a8 QY |
286 | /* boundary check */ |
287 | filtered = pim_is_group_filtered(pim_ifp, &sg.grp); | |
288 | ||
d62a17ae | 289 | /* Scan joined sources */ |
290 | for (source = 0; source < msg_num_joined_sources; ++source) { | |
291 | addr_offset = pim_parse_addr_source( | |
292 | &sg, &msg_source_flags, buf, pastend - buf); | |
293 | if (addr_offset < 1) { | |
294 | return -7; | |
295 | } | |
296 | ||
297 | buf += addr_offset; | |
298 | ||
b0f525a8 QY |
299 | /* if we are filtering this group, skip the join */ |
300 | if (filtered) | |
301 | continue; | |
302 | ||
d62a17ae | 303 | recv_join(ifp, neigh, msg_holdtime, |
304 | msg_upstream_addr.u.prefix4, &sg, | |
305 | msg_source_flags); | |
306 | ||
2a27f13b | 307 | if (pim_addr_is_any(sg.src)) { |
d62a17ae | 308 | starg_ch = pim_ifchannel_find(ifp, &sg); |
309 | if (starg_ch) | |
310 | pim_ifchannel_set_star_g_join_state( | |
c206937b | 311 | starg_ch, 0, 1); |
d62a17ae | 312 | } |
313 | } | |
314 | ||
315 | /* Scan pruned sources */ | |
316 | for (source = 0; source < msg_num_pruned_sources; ++source) { | |
317 | addr_offset = pim_parse_addr_source( | |
318 | &sg, &msg_source_flags, buf, pastend - buf); | |
319 | if (addr_offset < 1) { | |
320 | return -8; | |
321 | } | |
322 | ||
d62a17ae | 323 | buf += addr_offset; |
b0f525a8 QY |
324 | |
325 | /* if we are filtering this group, skip the prune */ | |
326 | if (filtered) | |
327 | continue; | |
328 | ||
d62a17ae | 329 | recv_prune(ifp, neigh, msg_holdtime, |
330 | msg_upstream_addr.u.prefix4, &sg, | |
331 | msg_source_flags); | |
8e7a4c6e DS |
332 | /* |
333 | * So if we are receiving a S,G,RPT prune | |
334 | * before we have any data for that S,G | |
335 | * We need to retrieve the sg_ch after | |
336 | * we parse the prune. | |
337 | */ | |
338 | sg_ch = pim_ifchannel_find(ifp, &sg); | |
339 | ||
fa8c500f SP |
340 | if (!sg_ch) |
341 | continue; | |
342 | ||
343 | /* (*,G) prune received */ | |
344 | for (ALL_LIST_ELEMENTS(sg_ch->sources, ch_node, | |
345 | nch_node, child)) { | |
346 | if (PIM_IF_FLAG_TEST_S_G_RPT(child->flags)) { | |
347 | if (child->ifjoin_state | |
348 | == PIM_IFJOIN_PRUNE_PENDING_TMP) | |
349 | THREAD_OFF( | |
350 | child->t_ifjoin_prune_pending_timer); | |
99f9518b | 351 | THREAD_OFF( |
352 | child->t_ifjoin_expiry_timer); | |
fa8c500f SP |
353 | PIM_IF_FLAG_UNSET_S_G_RPT(child->flags); |
354 | child->ifjoin_state = PIM_IFJOIN_NOINFO; | |
99f9518b | 355 | delete_on_noinfo(child); |
fa8c500f SP |
356 | } |
357 | } | |
358 | ||
d62a17ae | 359 | /* Received SG-RPT Prune delete oif from specific S,G */ |
fa8c500f | 360 | if (starg_ch && (msg_source_flags & PIM_RPT_BIT_MASK) |
d62a17ae | 361 | && !(msg_source_flags & PIM_WILDCARD_BIT_MASK)) { |
362 | struct pim_upstream *up = sg_ch->upstream; | |
363 | PIM_IF_FLAG_SET_S_G_RPT(sg_ch->flags); | |
364 | if (up) { | |
23fc858a | 365 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 366 | zlog_debug( |
367 | "%s: SGRpt flag is set, del inherit oif from up %s", | |
15569c58 | 368 | __func__, up->sg_str); |
1537a668 | 369 | pim_channel_del_inherited_oif( |
d62a17ae | 370 | up->channel_oil, |
371 | starg_ch->interface, | |
1b249e70 | 372 | __func__); |
d62a17ae | 373 | } |
374 | } | |
375 | } | |
b0f525a8 | 376 | if (starg_ch && !filtered) |
c206937b | 377 | pim_ifchannel_set_star_g_join_state(starg_ch, 1, 0); |
d62a17ae | 378 | starg_ch = NULL; |
379 | } /* scan groups */ | |
380 | ||
381 | return 0; | |
12e41d03 DL |
382 | } |
383 | ||
982bff89 DS |
384 | /* |
385 | * J/P Message Format | |
386 | * | |
387 | * While the RFC clearly states that this is 32 bits wide, it | |
388 | * is cheating. These fields: | |
389 | * Encoded-Unicast format (6 bytes MIN) | |
390 | * Encoded-Group format (8 bytes MIN) | |
391 | * Encoded-Source format (8 bytes MIN) | |
392 | * are *not* 32 bits wide. | |
393 | * | |
394 | * Nor does the RFC explicitly call out the size for: | |
395 | * Reserved (1 byte) | |
396 | * Num Groups (1 byte) | |
397 | * Holdtime (2 bytes) | |
398 | * Number of Joined Sources (2 bytes) | |
399 | * Number of Pruned Sources (2 bytes) | |
400 | * | |
401 | * This leads to a missleading representation from casual | |
402 | * reading and making assumptions. Be careful! | |
403 | * | |
404 | * 0 1 2 3 | |
405 | * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 | |
406 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
407 | * |PIM Ver| Type | Reserved | Checksum | | |
408 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
409 | * | Upstream Neighbor Address (Encoded-Unicast format) | | |
410 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
411 | * | Reserved | Num groups | Holdtime | | |
412 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
413 | * | Multicast Group Address 1 (Encoded-Group format) | | |
414 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
415 | * | Number of Joined Sources | Number of Pruned Sources | | |
416 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
417 | * | Joined Source Address 1 (Encoded-Source format) | | |
418 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
419 | * | . | | |
420 | * | . | | |
421 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
422 | * | Joined Source Address n (Encoded-Source format) | | |
423 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
424 | * | Pruned Source Address 1 (Encoded-Source format) | | |
425 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
426 | * | . | | |
427 | * | . | | |
428 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
429 | * | Pruned Source Address n (Encoded-Source format) | | |
430 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
431 | * | Multicast Group Address m (Encoded-Group format) | | |
432 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
433 | * | Number of Joined Sources | Number of Pruned Sources | | |
434 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
435 | * | Joined Source Address 1 (Encoded-Source format) | | |
436 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
437 | * | . | | |
438 | * | . | | |
439 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
440 | * | Joined Source Address n (Encoded-Source format) | | |
441 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
442 | * | Pruned Source Address 1 (Encoded-Source format) | | |
443 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
444 | * | . | | |
445 | * | . | | |
446 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
447 | * | Pruned Source Address n (Encoded-Source format) | | |
448 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
449 | */ | |
d62a17ae | 450 | int pim_joinprune_send(struct pim_rpf *rpf, struct list *groups) |
12e41d03 | 451 | { |
d62a17ae | 452 | struct pim_jp_agg_group *group; |
453 | struct pim_interface *pim_ifp = NULL; | |
454 | struct pim_jp_groups *grp = NULL; | |
a97986ff | 455 | struct pim_jp *msg = NULL; |
d62a17ae | 456 | struct listnode *node, *nnode; |
457 | uint8_t pim_msg[10000]; | |
458 | uint8_t *curr_ptr = pim_msg; | |
459 | bool new_packet = true; | |
460 | size_t packet_left = 0; | |
461 | size_t packet_size = 0; | |
462 | size_t group_size = 0; | |
463 | ||
d62a17ae | 464 | if (rpf->source_nexthop.interface) |
465 | pim_ifp = rpf->source_nexthop.interface->info; | |
466 | else { | |
5e81f5dd | 467 | zlog_warn("%s: RPF interface is not present", __func__); |
d62a17ae | 468 | return -1; |
469 | } | |
470 | ||
5e81f5dd DS |
471 | on_trace(__func__, rpf->source_nexthop.interface, |
472 | rpf->rpf_addr.u.prefix4); | |
957d93ea | 473 | |
d62a17ae | 474 | if (!pim_ifp) { |
5e81f5dd | 475 | zlog_warn("%s: multicast not enabled on interface %s", __func__, |
d62a17ae | 476 | rpf->source_nexthop.interface->name); |
477 | return -1; | |
478 | } | |
479 | ||
480 | if (PIM_INADDR_IS_ANY(rpf->rpf_addr.u.prefix4)) { | |
481 | if (PIM_DEBUG_PIM_J_P) { | |
482 | char dst_str[INET_ADDRSTRLEN]; | |
483 | pim_inet4_dump("<dst?>", rpf->rpf_addr.u.prefix4, | |
484 | dst_str, sizeof(dst_str)); | |
485 | zlog_debug("%s: upstream=%s is myself on interface %s", | |
5e81f5dd | 486 | __func__, dst_str, |
d62a17ae | 487 | rpf->source_nexthop.interface->name); |
488 | } | |
489 | return 0; | |
490 | } | |
491 | ||
492 | /* | |
493 | RFC 4601: 4.3.1. Sending Hello Messages | |
494 | ||
495 | Thus, if a router needs to send a Join/Prune or Assert message on | |
496 | an interface on which it has not yet sent a Hello message with the | |
497 | currently configured IP address, then it MUST immediately send the | |
498 | relevant Hello message without waiting for the Hello Timer to | |
499 | expire, followed by the Join/Prune or Assert message. | |
500 | */ | |
501 | pim_hello_require(rpf->source_nexthop.interface); | |
502 | ||
503 | for (ALL_LIST_ELEMENTS(groups, node, nnode, group)) { | |
504 | if (new_packet) { | |
505 | msg = (struct pim_jp *)pim_msg; | |
506 | ||
507 | memset(msg, 0, sizeof(*msg)); | |
508 | ||
509 | pim_msg_addr_encode_ipv4_ucast((uint8_t *)&msg->addr, | |
510 | rpf->rpf_addr.u.prefix4); | |
511 | msg->reserved = 0; | |
512 | msg->holdtime = htons(PIM_JP_HOLDTIME); | |
513 | ||
514 | new_packet = false; | |
515 | ||
516 | grp = &msg->groups[0]; | |
517 | curr_ptr = (uint8_t *)grp; | |
518 | packet_size = sizeof(struct pim_msg_header); | |
519 | packet_size += sizeof(struct pim_encoded_ipv4_unicast); | |
520 | packet_size += | |
521 | 4; // reserved (1) + groups (1) + holdtime (2) | |
522 | ||
523 | packet_left = rpf->source_nexthop.interface->mtu - 24; | |
524 | packet_left -= packet_size; | |
525 | } | |
526 | if (PIM_DEBUG_PIM_J_P) { | |
527 | char dst_str[INET_ADDRSTRLEN]; | |
528 | char grp_str[INET_ADDRSTRLEN]; | |
529 | pim_inet4_dump("<dst?>", rpf->rpf_addr.u.prefix4, | |
530 | dst_str, sizeof(dst_str)); | |
531 | pim_inet4_dump("<grp?>", group->group, grp_str, | |
532 | sizeof(grp_str)); | |
533 | zlog_debug( | |
534 | "%s: sending (G)=%s to upstream=%s on interface %s", | |
5e81f5dd | 535 | __func__, grp_str, dst_str, |
d62a17ae | 536 | rpf->source_nexthop.interface->name); |
537 | } | |
538 | ||
539 | group_size = pim_msg_get_jp_group_size(group->sources); | |
540 | if (group_size > packet_left) { | |
541 | pim_msg_build_header(pim_msg, packet_size, | |
d57a8bbf | 542 | PIM_MSG_TYPE_JOIN_PRUNE, false); |
d62a17ae | 543 | if (pim_msg_send(pim_ifp->pim_sock_fd, |
544 | pim_ifp->primary_address, | |
545 | qpim_all_pim_routers_addr, pim_msg, | |
546 | packet_size, | |
547 | rpf->source_nexthop.interface->name)) { | |
548 | zlog_warn( | |
549 | "%s: could not send PIM message on interface %s", | |
5e81f5dd | 550 | __func__, |
d62a17ae | 551 | rpf->source_nexthop.interface->name); |
552 | } | |
553 | ||
554 | msg = (struct pim_jp *)pim_msg; | |
555 | memset(msg, 0, sizeof(*msg)); | |
556 | ||
557 | pim_msg_addr_encode_ipv4_ucast((uint8_t *)&msg->addr, | |
558 | rpf->rpf_addr.u.prefix4); | |
559 | msg->reserved = 0; | |
560 | msg->holdtime = htons(PIM_JP_HOLDTIME); | |
561 | ||
562 | new_packet = false; | |
563 | ||
564 | grp = &msg->groups[0]; | |
565 | curr_ptr = (uint8_t *)grp; | |
566 | packet_size = sizeof(struct pim_msg_header); | |
567 | packet_size += sizeof(struct pim_encoded_ipv4_unicast); | |
568 | packet_size += | |
569 | 4; // reserved (1) + groups (1) + holdtime (2) | |
570 | ||
571 | packet_left = rpf->source_nexthop.interface->mtu - 24; | |
572 | packet_left -= packet_size; | |
573 | } | |
574 | ||
575 | msg->num_groups++; | |
576 | /* | |
577 | Build PIM message | |
578 | */ | |
579 | ||
580 | curr_ptr += group_size; | |
581 | packet_left -= group_size; | |
582 | packet_size += group_size; | |
583 | pim_msg_build_jp_groups(grp, group, group_size); | |
584 | ||
585 | pim_ifp->pim_ifstat_join_send += ntohs(grp->joins); | |
586 | pim_ifp->pim_ifstat_prune_send += ntohs(grp->prunes); | |
587 | ||
588 | if (PIM_DEBUG_PIM_TRACE) | |
589 | zlog_debug( | |
590 | "%s: interface %s num_joins %u num_prunes %u", | |
5e81f5dd | 591 | __func__, rpf->source_nexthop.interface->name, |
d62a17ae | 592 | ntohs(grp->joins), ntohs(grp->prunes)); |
593 | ||
594 | grp = (struct pim_jp_groups *)curr_ptr; | |
595 | if (packet_left < sizeof(struct pim_jp_groups) | |
596 | || msg->num_groups == 255) { | |
597 | pim_msg_build_header(pim_msg, packet_size, | |
d57a8bbf | 598 | PIM_MSG_TYPE_JOIN_PRUNE, false); |
d62a17ae | 599 | if (pim_msg_send(pim_ifp->pim_sock_fd, |
600 | pim_ifp->primary_address, | |
601 | qpim_all_pim_routers_addr, pim_msg, | |
602 | packet_size, | |
603 | rpf->source_nexthop.interface->name)) { | |
604 | zlog_warn( | |
605 | "%s: could not send PIM message on interface %s", | |
5e81f5dd | 606 | __func__, |
d62a17ae | 607 | rpf->source_nexthop.interface->name); |
608 | } | |
609 | ||
610 | new_packet = true; | |
611 | } | |
612 | } | |
613 | ||
614 | ||
615 | if (!new_packet) { | |
616 | // msg->num_groups = htons (msg->num_groups); | |
617 | pim_msg_build_header(pim_msg, packet_size, | |
d57a8bbf | 618 | PIM_MSG_TYPE_JOIN_PRUNE, false); |
d62a17ae | 619 | if (pim_msg_send(pim_ifp->pim_sock_fd, pim_ifp->primary_address, |
620 | qpim_all_pim_routers_addr, pim_msg, | |
621 | packet_size, | |
622 | rpf->source_nexthop.interface->name)) { | |
623 | zlog_warn( | |
624 | "%s: could not send PIM message on interface %s", | |
5e81f5dd | 625 | __func__, rpf->source_nexthop.interface->name); |
d62a17ae | 626 | } |
627 | } | |
628 | return 0; | |
12e41d03 | 629 | } |