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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 DS |
97 | if (sg->src.s_addr != rp->rpf_addr.u.prefix4.s_addr) { |
98 | char received_rp[INET_ADDRSTRLEN]; | |
99 | char local_rp[INET_ADDRSTRLEN]; | |
100 | pim_inet4_dump("<received?>", sg->src, received_rp, | |
101 | sizeof(received_rp)); | |
102 | pim_inet4_dump("<local?>", rp->rpf_addr.u.prefix4, | |
103 | local_rp, sizeof(local_rp)); | |
15569c58 DA |
104 | zlog_warn( |
105 | "%s: Specified RP(%s) in join is different than our configured RP(%s)", | |
106 | __func__, received_rp, local_rp); | |
d62a17ae | 107 | return; |
a57103e9 | 108 | } |
d62a17ae | 109 | |
34abbcc4 SG |
110 | if (pim_is_grp_ssm(pim_ifp->pim, sg->grp)) { |
111 | zlog_warn( | |
38c848c9 DS |
112 | "%s: Specified Group(%pI4) in join is now in SSM, not allowed to create PIM state", |
113 | __func__, &sg->grp); | |
34abbcc4 SG |
114 | return; |
115 | } | |
116 | ||
bca160c6 | 117 | sg->src = PIMADDR_ANY; |
d62a17ae | 118 | } |
119 | ||
120 | /* Restart join expiry timer */ | |
121 | pim_ifchannel_join_add(ifp, neigh->source_addr, upstream, sg, | |
122 | source_flags, holdtime); | |
12e41d03 DL |
123 | } |
124 | ||
d62a17ae | 125 | static void recv_prune(struct interface *ifp, struct pim_neighbor *neigh, |
126 | uint16_t holdtime, struct in_addr upstream, | |
6fff2cc6 | 127 | pim_sgaddr *sg, uint8_t source_flags) |
12e41d03 | 128 | { |
d62a17ae | 129 | struct pim_interface *pim_ifp = NULL; |
130 | ||
131 | if (PIM_DEBUG_PIM_TRACE) { | |
132 | char up_str[INET_ADDRSTRLEN]; | |
133 | char neigh_str[INET_ADDRSTRLEN]; | |
134 | pim_inet4_dump("<upstream?>", upstream, up_str, sizeof(up_str)); | |
135 | pim_inet4_dump("<neigh?>", neigh->source_addr, neigh_str, | |
136 | sizeof(neigh_str)); | |
98a81d2b DL |
137 | zlog_debug("%s: prune (S,G)=%pSG rpt=%d wc=%d upstream=%s holdtime=%d from %s on %s", |
138 | __func__, sg, | |
139 | source_flags & PIM_RPT_BIT_MASK, | |
140 | source_flags & PIM_WILDCARD_BIT_MASK, up_str, | |
141 | holdtime, | |
142 | neigh_str, ifp->name); | |
d62a17ae | 143 | } |
144 | ||
145 | pim_ifp = ifp->info; | |
df5dfb77 | 146 | assert(pim_ifp); |
d62a17ae | 147 | |
148 | ++pim_ifp->pim_ifstat_prune_recv; | |
149 | ||
150 | if ((source_flags & PIM_RPT_BIT_MASK) | |
151 | && (source_flags & PIM_WILDCARD_BIT_MASK)) { | |
5c777da8 | 152 | /* |
153 | * RFC 4601 Section 4.5.2: | |
154 | * Received Prune(*,G) messages are processed even if the | |
155 | * RP in the message does not match RP(G). | |
156 | */ | |
157 | if (PIM_DEBUG_PIM_TRACE) { | |
158 | char received_rp[INET_ADDRSTRLEN]; | |
d62a17ae | 159 | |
5c777da8 | 160 | pim_inet4_dump("<received?>", sg->src, received_rp, |
161 | sizeof(received_rp)); | |
6fff2cc6 | 162 | zlog_debug("%s: Prune received with RP(%s) for %pSG", |
5c777da8 | 163 | __func__, received_rp, sg); |
b1945363 | 164 | } |
d62a17ae | 165 | |
bca160c6 | 166 | sg->src = PIMADDR_ANY; |
d62a17ae | 167 | } |
168 | ||
169 | pim_ifchannel_prune(ifp, upstream, sg, source_flags, holdtime); | |
12e41d03 DL |
170 | } |
171 | ||
d62a17ae | 172 | int pim_joinprune_recv(struct interface *ifp, struct pim_neighbor *neigh, |
173 | struct in_addr src_addr, uint8_t *tlv_buf, | |
174 | int tlv_buf_size) | |
12e41d03 | 175 | { |
d62a17ae | 176 | struct prefix msg_upstream_addr; |
b0f525a8 | 177 | struct pim_interface *pim_ifp; |
d62a17ae | 178 | uint8_t msg_num_groups; |
179 | uint16_t msg_holdtime; | |
180 | int addr_offset; | |
181 | uint8_t *buf; | |
182 | uint8_t *pastend; | |
183 | int remain; | |
184 | int group; | |
fa8c500f SP |
185 | struct pim_ifchannel *child = NULL; |
186 | struct listnode *ch_node, *nch_node; | |
d62a17ae | 187 | |
188 | buf = tlv_buf; | |
189 | pastend = tlv_buf + tlv_buf_size; | |
b0f525a8 | 190 | pim_ifp = ifp->info; |
d62a17ae | 191 | |
192 | /* | |
193 | Parse ucast addr | |
194 | */ | |
195 | addr_offset = | |
196 | pim_parse_addr_ucast(&msg_upstream_addr, buf, pastend - buf); | |
197 | if (addr_offset < 1) { | |
198 | char src_str[INET_ADDRSTRLEN]; | |
199 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); | |
200 | zlog_warn("%s: pim_parse_addr_ucast() failure: from %s on %s", | |
15569c58 | 201 | __func__, src_str, ifp->name); |
d62a17ae | 202 | return -1; |
203 | } | |
204 | buf += addr_offset; | |
205 | ||
206 | /* | |
207 | Check upstream address family | |
208 | */ | |
209 | if (msg_upstream_addr.family != AF_INET) { | |
fb9670aa DS |
210 | char src_str[INET_ADDRSTRLEN]; |
211 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); | |
15569c58 DA |
212 | zlog_warn( |
213 | "%s: ignoring join/prune directed to unexpected addr family=%d from %s on %s", | |
214 | __func__, msg_upstream_addr.family, src_str, ifp->name); | |
d62a17ae | 215 | return -2; |
216 | } | |
217 | ||
218 | remain = pastend - buf; | |
219 | if (remain < 4) { | |
220 | char src_str[INET_ADDRSTRLEN]; | |
221 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); | |
222 | zlog_warn( | |
223 | "%s: short join/prune message buffer for group list: size=%d minimum=%d from %s on %s", | |
15569c58 | 224 | __func__, remain, 4, src_str, ifp->name); |
d62a17ae | 225 | return -4; |
226 | } | |
227 | ||
228 | ++buf; /* skip reserved byte */ | |
229 | msg_num_groups = *(const uint8_t *)buf; | |
230 | ++buf; | |
231 | msg_holdtime = ntohs(*(const uint16_t *)buf); | |
232 | ++buf; | |
233 | ++buf; | |
234 | ||
235 | if (PIM_DEBUG_PIM_J_P) { | |
236 | char src_str[INET_ADDRSTRLEN]; | |
237 | char upstream_str[INET_ADDRSTRLEN]; | |
238 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); | |
239 | pim_inet4_dump("<addr?>", msg_upstream_addr.u.prefix4, | |
240 | upstream_str, sizeof(upstream_str)); | |
241 | zlog_debug( | |
242 | "%s: join/prune upstream=%s groups=%d holdtime=%d from %s on %s", | |
15569c58 DA |
243 | __func__, upstream_str, msg_num_groups, msg_holdtime, |
244 | src_str, ifp->name); | |
d62a17ae | 245 | } |
246 | ||
247 | /* Scan groups */ | |
248 | for (group = 0; group < msg_num_groups; ++group) { | |
6fff2cc6 | 249 | pim_sgaddr sg; |
d62a17ae | 250 | uint8_t msg_source_flags; |
251 | uint16_t msg_num_joined_sources; | |
252 | uint16_t msg_num_pruned_sources; | |
253 | int source; | |
254 | struct pim_ifchannel *starg_ch = NULL, *sg_ch = NULL; | |
b0f525a8 | 255 | bool filtered = false; |
d62a17ae | 256 | |
6fff2cc6 | 257 | memset(&sg, 0, sizeof(sg)); |
d62a17ae | 258 | addr_offset = pim_parse_addr_group(&sg, buf, pastend - buf); |
259 | if (addr_offset < 1) { | |
260 | return -5; | |
261 | } | |
262 | buf += addr_offset; | |
263 | ||
264 | remain = pastend - buf; | |
265 | if (remain < 4) { | |
266 | char src_str[INET_ADDRSTRLEN]; | |
267 | pim_inet4_dump("<src?>", src_addr, src_str, | |
268 | sizeof(src_str)); | |
269 | zlog_warn( | |
270 | "%s: short join/prune buffer for source list: size=%d minimum=%d from %s on %s", | |
15569c58 | 271 | __func__, remain, 4, src_str, ifp->name); |
d62a17ae | 272 | return -6; |
273 | } | |
274 | ||
275 | msg_num_joined_sources = ntohs(*(const uint16_t *)buf); | |
276 | buf += 2; | |
277 | msg_num_pruned_sources = ntohs(*(const uint16_t *)buf); | |
278 | buf += 2; | |
279 | ||
280 | if (PIM_DEBUG_PIM_J_P) { | |
281 | char src_str[INET_ADDRSTRLEN]; | |
282 | char upstream_str[INET_ADDRSTRLEN]; | |
283 | char group_str[INET_ADDRSTRLEN]; | |
284 | pim_inet4_dump("<src?>", src_addr, src_str, | |
285 | sizeof(src_str)); | |
286 | pim_inet4_dump("<addr?>", msg_upstream_addr.u.prefix4, | |
287 | upstream_str, sizeof(upstream_str)); | |
288 | pim_inet4_dump("<grp?>", sg.grp, group_str, | |
289 | sizeof(group_str)); | |
fb9670aa | 290 | zlog_debug( |
d62a17ae | 291 | "%s: join/prune upstream=%s group=%s/32 join_src=%d prune_src=%d from %s on %s", |
15569c58 | 292 | __func__, upstream_str, group_str, |
d62a17ae | 293 | msg_num_joined_sources, msg_num_pruned_sources, |
294 | src_str, ifp->name); | |
295 | } | |
296 | ||
b0f525a8 QY |
297 | /* boundary check */ |
298 | filtered = pim_is_group_filtered(pim_ifp, &sg.grp); | |
299 | ||
d62a17ae | 300 | /* Scan joined sources */ |
301 | for (source = 0; source < msg_num_joined_sources; ++source) { | |
302 | addr_offset = pim_parse_addr_source( | |
303 | &sg, &msg_source_flags, buf, pastend - buf); | |
304 | if (addr_offset < 1) { | |
305 | return -7; | |
306 | } | |
307 | ||
308 | buf += addr_offset; | |
309 | ||
b0f525a8 QY |
310 | /* if we are filtering this group, skip the join */ |
311 | if (filtered) | |
312 | continue; | |
313 | ||
d62a17ae | 314 | recv_join(ifp, neigh, msg_holdtime, |
315 | msg_upstream_addr.u.prefix4, &sg, | |
316 | msg_source_flags); | |
317 | ||
2a27f13b | 318 | if (pim_addr_is_any(sg.src)) { |
d62a17ae | 319 | starg_ch = pim_ifchannel_find(ifp, &sg); |
320 | if (starg_ch) | |
321 | pim_ifchannel_set_star_g_join_state( | |
c206937b | 322 | starg_ch, 0, 1); |
d62a17ae | 323 | } |
324 | } | |
325 | ||
326 | /* Scan pruned sources */ | |
327 | for (source = 0; source < msg_num_pruned_sources; ++source) { | |
328 | addr_offset = pim_parse_addr_source( | |
329 | &sg, &msg_source_flags, buf, pastend - buf); | |
330 | if (addr_offset < 1) { | |
331 | return -8; | |
332 | } | |
333 | ||
d62a17ae | 334 | buf += addr_offset; |
b0f525a8 QY |
335 | |
336 | /* if we are filtering this group, skip the prune */ | |
337 | if (filtered) | |
338 | continue; | |
339 | ||
d62a17ae | 340 | recv_prune(ifp, neigh, msg_holdtime, |
341 | msg_upstream_addr.u.prefix4, &sg, | |
342 | msg_source_flags); | |
8e7a4c6e DS |
343 | /* |
344 | * So if we are receiving a S,G,RPT prune | |
345 | * before we have any data for that S,G | |
346 | * We need to retrieve the sg_ch after | |
347 | * we parse the prune. | |
348 | */ | |
349 | sg_ch = pim_ifchannel_find(ifp, &sg); | |
350 | ||
fa8c500f SP |
351 | if (!sg_ch) |
352 | continue; | |
353 | ||
354 | /* (*,G) prune received */ | |
355 | for (ALL_LIST_ELEMENTS(sg_ch->sources, ch_node, | |
356 | nch_node, child)) { | |
357 | if (PIM_IF_FLAG_TEST_S_G_RPT(child->flags)) { | |
358 | if (child->ifjoin_state | |
359 | == PIM_IFJOIN_PRUNE_PENDING_TMP) | |
360 | THREAD_OFF( | |
361 | child->t_ifjoin_prune_pending_timer); | |
99f9518b | 362 | THREAD_OFF( |
363 | child->t_ifjoin_expiry_timer); | |
fa8c500f SP |
364 | PIM_IF_FLAG_UNSET_S_G_RPT(child->flags); |
365 | child->ifjoin_state = PIM_IFJOIN_NOINFO; | |
99f9518b | 366 | delete_on_noinfo(child); |
fa8c500f SP |
367 | } |
368 | } | |
369 | ||
d62a17ae | 370 | /* Received SG-RPT Prune delete oif from specific S,G */ |
fa8c500f | 371 | if (starg_ch && (msg_source_flags & PIM_RPT_BIT_MASK) |
d62a17ae | 372 | && !(msg_source_flags & PIM_WILDCARD_BIT_MASK)) { |
373 | struct pim_upstream *up = sg_ch->upstream; | |
374 | PIM_IF_FLAG_SET_S_G_RPT(sg_ch->flags); | |
375 | if (up) { | |
23fc858a | 376 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 377 | zlog_debug( |
378 | "%s: SGRpt flag is set, del inherit oif from up %s", | |
15569c58 | 379 | __func__, up->sg_str); |
1537a668 | 380 | pim_channel_del_inherited_oif( |
d62a17ae | 381 | up->channel_oil, |
382 | starg_ch->interface, | |
1b249e70 | 383 | __func__); |
d62a17ae | 384 | } |
385 | } | |
386 | } | |
b0f525a8 | 387 | if (starg_ch && !filtered) |
c206937b | 388 | pim_ifchannel_set_star_g_join_state(starg_ch, 1, 0); |
d62a17ae | 389 | starg_ch = NULL; |
390 | } /* scan groups */ | |
391 | ||
392 | return 0; | |
12e41d03 DL |
393 | } |
394 | ||
982bff89 DS |
395 | /* |
396 | * J/P Message Format | |
397 | * | |
398 | * While the RFC clearly states that this is 32 bits wide, it | |
399 | * is cheating. These fields: | |
400 | * Encoded-Unicast format (6 bytes MIN) | |
401 | * Encoded-Group format (8 bytes MIN) | |
402 | * Encoded-Source format (8 bytes MIN) | |
403 | * are *not* 32 bits wide. | |
404 | * | |
405 | * Nor does the RFC explicitly call out the size for: | |
406 | * Reserved (1 byte) | |
407 | * Num Groups (1 byte) | |
408 | * Holdtime (2 bytes) | |
409 | * Number of Joined Sources (2 bytes) | |
410 | * Number of Pruned Sources (2 bytes) | |
411 | * | |
412 | * This leads to a missleading representation from casual | |
413 | * reading and making assumptions. Be careful! | |
414 | * | |
415 | * 0 1 2 3 | |
416 | * 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 | |
417 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
418 | * |PIM Ver| Type | Reserved | Checksum | | |
419 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
420 | * | Upstream Neighbor Address (Encoded-Unicast format) | | |
421 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
422 | * | Reserved | Num groups | Holdtime | | |
423 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
424 | * | Multicast Group Address 1 (Encoded-Group format) | | |
425 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
426 | * | Number of Joined Sources | Number of Pruned Sources | | |
427 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
428 | * | Joined Source Address 1 (Encoded-Source format) | | |
429 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
430 | * | . | | |
431 | * | . | | |
432 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
433 | * | Joined Source Address n (Encoded-Source format) | | |
434 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
435 | * | Pruned Source Address 1 (Encoded-Source format) | | |
436 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
437 | * | . | | |
438 | * | . | | |
439 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
440 | * | Pruned Source Address n (Encoded-Source format) | | |
441 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
442 | * | Multicast Group Address m (Encoded-Group format) | | |
443 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
444 | * | Number of Joined Sources | Number of Pruned Sources | | |
445 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
446 | * | Joined Source Address 1 (Encoded-Source format) | | |
447 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
448 | * | . | | |
449 | * | . | | |
450 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
451 | * | Joined Source Address n (Encoded-Source format) | | |
452 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
453 | * | Pruned Source Address 1 (Encoded-Source format) | | |
454 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
455 | * | . | | |
456 | * | . | | |
457 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
458 | * | Pruned Source Address n (Encoded-Source format) | | |
459 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
460 | */ | |
d62a17ae | 461 | int pim_joinprune_send(struct pim_rpf *rpf, struct list *groups) |
12e41d03 | 462 | { |
d62a17ae | 463 | struct pim_jp_agg_group *group; |
464 | struct pim_interface *pim_ifp = NULL; | |
465 | struct pim_jp_groups *grp = NULL; | |
a97986ff | 466 | struct pim_jp *msg = NULL; |
d62a17ae | 467 | struct listnode *node, *nnode; |
468 | uint8_t pim_msg[10000]; | |
469 | uint8_t *curr_ptr = pim_msg; | |
470 | bool new_packet = true; | |
471 | size_t packet_left = 0; | |
472 | size_t packet_size = 0; | |
473 | size_t group_size = 0; | |
474 | ||
d62a17ae | 475 | if (rpf->source_nexthop.interface) |
476 | pim_ifp = rpf->source_nexthop.interface->info; | |
477 | else { | |
5e81f5dd | 478 | zlog_warn("%s: RPF interface is not present", __func__); |
d62a17ae | 479 | return -1; |
480 | } | |
481 | ||
5e81f5dd DS |
482 | on_trace(__func__, rpf->source_nexthop.interface, |
483 | rpf->rpf_addr.u.prefix4); | |
957d93ea | 484 | |
d62a17ae | 485 | if (!pim_ifp) { |
5e81f5dd | 486 | zlog_warn("%s: multicast not enabled on interface %s", __func__, |
d62a17ae | 487 | rpf->source_nexthop.interface->name); |
488 | return -1; | |
489 | } | |
490 | ||
491 | if (PIM_INADDR_IS_ANY(rpf->rpf_addr.u.prefix4)) { | |
492 | if (PIM_DEBUG_PIM_J_P) { | |
493 | char dst_str[INET_ADDRSTRLEN]; | |
494 | pim_inet4_dump("<dst?>", rpf->rpf_addr.u.prefix4, | |
495 | dst_str, sizeof(dst_str)); | |
496 | zlog_debug("%s: upstream=%s is myself on interface %s", | |
5e81f5dd | 497 | __func__, dst_str, |
d62a17ae | 498 | rpf->source_nexthop.interface->name); |
499 | } | |
500 | return 0; | |
501 | } | |
502 | ||
503 | /* | |
504 | RFC 4601: 4.3.1. Sending Hello Messages | |
505 | ||
506 | Thus, if a router needs to send a Join/Prune or Assert message on | |
507 | an interface on which it has not yet sent a Hello message with the | |
508 | currently configured IP address, then it MUST immediately send the | |
509 | relevant Hello message without waiting for the Hello Timer to | |
510 | expire, followed by the Join/Prune or Assert message. | |
511 | */ | |
512 | pim_hello_require(rpf->source_nexthop.interface); | |
513 | ||
514 | for (ALL_LIST_ELEMENTS(groups, node, nnode, group)) { | |
515 | if (new_packet) { | |
516 | msg = (struct pim_jp *)pim_msg; | |
517 | ||
518 | memset(msg, 0, sizeof(*msg)); | |
519 | ||
520 | pim_msg_addr_encode_ipv4_ucast((uint8_t *)&msg->addr, | |
521 | rpf->rpf_addr.u.prefix4); | |
522 | msg->reserved = 0; | |
523 | msg->holdtime = htons(PIM_JP_HOLDTIME); | |
524 | ||
525 | new_packet = false; | |
526 | ||
527 | grp = &msg->groups[0]; | |
528 | curr_ptr = (uint8_t *)grp; | |
529 | packet_size = sizeof(struct pim_msg_header); | |
530 | packet_size += sizeof(struct pim_encoded_ipv4_unicast); | |
531 | packet_size += | |
532 | 4; // reserved (1) + groups (1) + holdtime (2) | |
533 | ||
534 | packet_left = rpf->source_nexthop.interface->mtu - 24; | |
535 | packet_left -= packet_size; | |
536 | } | |
537 | if (PIM_DEBUG_PIM_J_P) { | |
538 | char dst_str[INET_ADDRSTRLEN]; | |
539 | char grp_str[INET_ADDRSTRLEN]; | |
540 | pim_inet4_dump("<dst?>", rpf->rpf_addr.u.prefix4, | |
541 | dst_str, sizeof(dst_str)); | |
542 | pim_inet4_dump("<grp?>", group->group, grp_str, | |
543 | sizeof(grp_str)); | |
544 | zlog_debug( | |
545 | "%s: sending (G)=%s to upstream=%s on interface %s", | |
5e81f5dd | 546 | __func__, grp_str, dst_str, |
d62a17ae | 547 | rpf->source_nexthop.interface->name); |
548 | } | |
549 | ||
550 | group_size = pim_msg_get_jp_group_size(group->sources); | |
551 | if (group_size > packet_left) { | |
552 | pim_msg_build_header(pim_msg, packet_size, | |
d57a8bbf | 553 | PIM_MSG_TYPE_JOIN_PRUNE, false); |
d62a17ae | 554 | if (pim_msg_send(pim_ifp->pim_sock_fd, |
555 | pim_ifp->primary_address, | |
556 | qpim_all_pim_routers_addr, pim_msg, | |
557 | packet_size, | |
558 | rpf->source_nexthop.interface->name)) { | |
559 | zlog_warn( | |
560 | "%s: could not send PIM message on interface %s", | |
5e81f5dd | 561 | __func__, |
d62a17ae | 562 | rpf->source_nexthop.interface->name); |
563 | } | |
564 | ||
565 | msg = (struct pim_jp *)pim_msg; | |
566 | memset(msg, 0, sizeof(*msg)); | |
567 | ||
568 | pim_msg_addr_encode_ipv4_ucast((uint8_t *)&msg->addr, | |
569 | rpf->rpf_addr.u.prefix4); | |
570 | msg->reserved = 0; | |
571 | msg->holdtime = htons(PIM_JP_HOLDTIME); | |
572 | ||
573 | new_packet = false; | |
574 | ||
575 | grp = &msg->groups[0]; | |
576 | curr_ptr = (uint8_t *)grp; | |
577 | packet_size = sizeof(struct pim_msg_header); | |
578 | packet_size += sizeof(struct pim_encoded_ipv4_unicast); | |
579 | packet_size += | |
580 | 4; // reserved (1) + groups (1) + holdtime (2) | |
581 | ||
582 | packet_left = rpf->source_nexthop.interface->mtu - 24; | |
583 | packet_left -= packet_size; | |
584 | } | |
585 | ||
586 | msg->num_groups++; | |
587 | /* | |
588 | Build PIM message | |
589 | */ | |
590 | ||
591 | curr_ptr += group_size; | |
592 | packet_left -= group_size; | |
593 | packet_size += group_size; | |
594 | pim_msg_build_jp_groups(grp, group, group_size); | |
595 | ||
596 | pim_ifp->pim_ifstat_join_send += ntohs(grp->joins); | |
597 | pim_ifp->pim_ifstat_prune_send += ntohs(grp->prunes); | |
598 | ||
599 | if (PIM_DEBUG_PIM_TRACE) | |
600 | zlog_debug( | |
601 | "%s: interface %s num_joins %u num_prunes %u", | |
5e81f5dd | 602 | __func__, rpf->source_nexthop.interface->name, |
d62a17ae | 603 | ntohs(grp->joins), ntohs(grp->prunes)); |
604 | ||
605 | grp = (struct pim_jp_groups *)curr_ptr; | |
606 | if (packet_left < sizeof(struct pim_jp_groups) | |
607 | || msg->num_groups == 255) { | |
608 | pim_msg_build_header(pim_msg, packet_size, | |
d57a8bbf | 609 | PIM_MSG_TYPE_JOIN_PRUNE, false); |
d62a17ae | 610 | if (pim_msg_send(pim_ifp->pim_sock_fd, |
611 | pim_ifp->primary_address, | |
612 | qpim_all_pim_routers_addr, pim_msg, | |
613 | packet_size, | |
614 | rpf->source_nexthop.interface->name)) { | |
615 | zlog_warn( | |
616 | "%s: could not send PIM message on interface %s", | |
5e81f5dd | 617 | __func__, |
d62a17ae | 618 | rpf->source_nexthop.interface->name); |
619 | } | |
620 | ||
621 | new_packet = true; | |
622 | } | |
623 | } | |
624 | ||
625 | ||
626 | if (!new_packet) { | |
627 | // msg->num_groups = htons (msg->num_groups); | |
628 | pim_msg_build_header(pim_msg, packet_size, | |
d57a8bbf | 629 | PIM_MSG_TYPE_JOIN_PRUNE, false); |
d62a17ae | 630 | if (pim_msg_send(pim_ifp->pim_sock_fd, pim_ifp->primary_address, |
631 | qpim_all_pim_routers_addr, pim_msg, | |
632 | packet_size, | |
633 | rpf->source_nexthop.interface->name)) { | |
634 | zlog_warn( | |
635 | "%s: could not send PIM message on interface %s", | |
5e81f5dd | 636 | __func__, rpf->source_nexthop.interface->name); |
d62a17ae | 637 | } |
638 | } | |
639 | return 0; | |
12e41d03 | 640 | } |