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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
38c848c9 DS |
2 | |
3 | ||
12e41d03 | 4 | /* |
896014f4 DL |
5 | * PIM for Quagga |
6 | * Copyright (C) 2008 Everton da Silva Marques | |
896014f4 | 7 | */ |
12e41d03 DL |
8 | |
9 | #include <zebra.h> | |
10 | ||
11 | #include "log.h" | |
12 | #include "prefix.h" | |
744d91b3 | 13 | #include "if.h" |
dfe43e25 DW |
14 | #include "vty.h" |
15 | #include "plist.h" | |
12e41d03 DL |
16 | |
17 | #include "pimd.h" | |
993e3d8e | 18 | #include "pim_instance.h" |
12e41d03 DL |
19 | #include "pim_str.h" |
20 | #include "pim_tlv.h" | |
21 | #include "pim_msg.h" | |
22 | #include "pim_pim.h" | |
23 | #include "pim_join.h" | |
3667b0bc | 24 | #include "pim_oil.h" |
12e41d03 DL |
25 | #include "pim_iface.h" |
26 | #include "pim_hello.h" | |
27 | #include "pim_ifchannel.h" | |
6c629103 DS |
28 | #include "pim_rpf.h" |
29 | #include "pim_rp.h" | |
982bff89 | 30 | #include "pim_jp_agg.h" |
b0f525a8 | 31 | #include "pim_util.h" |
34abbcc4 | 32 | #include "pim_ssm.h" |
12e41d03 | 33 | |
042a7541 | 34 | static void on_trace(const char *label, struct interface *ifp, pim_addr src) |
12e41d03 | 35 | { |
042a7541 DL |
36 | if (PIM_DEBUG_PIM_TRACE) |
37 | zlog_debug("%s: from %pPA on %s", label, &src, ifp->name); | |
12e41d03 DL |
38 | } |
39 | ||
d62a17ae | 40 | static void recv_join(struct interface *ifp, struct pim_neighbor *neigh, |
01adb431 DL |
41 | uint16_t holdtime, pim_addr upstream, pim_sgaddr *sg, |
42 | uint8_t source_flags) | |
12e41d03 | 43 | { |
d62a17ae | 44 | struct pim_interface *pim_ifp = NULL; |
45 | ||
01adb431 | 46 | if (PIM_DEBUG_PIM_TRACE) |
9bb93fa0 | 47 | zlog_debug( |
01adb431 | 48 | "%s: join (S,G)=%pSG rpt=%d wc=%d upstream=%pPAs holdtime=%d from %pPA on %s", |
9bb93fa0 | 49 | __func__, sg, !!(source_flags & PIM_RPT_BIT_MASK), |
01adb431 | 50 | !!(source_flags & PIM_WILDCARD_BIT_MASK), &upstream, |
9bb93fa0 | 51 | holdtime, &neigh->source_addr, ifp->name); |
d62a17ae | 52 | |
53 | pim_ifp = ifp->info; | |
df5dfb77 | 54 | assert(pim_ifp); |
d62a17ae | 55 | |
56 | ++pim_ifp->pim_ifstat_join_recv; | |
57 | ||
58 | /* | |
59 | * If the RPT and WC are set it's a (*,G) | |
60 | * and the source is the RP | |
61 | */ | |
c6950cb3 MR |
62 | if (CHECK_FLAG(source_flags, PIM_WILDCARD_BIT_MASK)) { |
63 | /* As per RFC 7761 Section 4.9.1: | |
64 | * The RPT (or Rendezvous Point Tree) bit is a 1-bit value for | |
65 | * use with PIM Join/Prune messages (see Section 4.9.5.1). If | |
66 | * the WC bit is 1, the RPT bit MUST be 1. | |
67 | */ | |
68 | if (!CHECK_FLAG(source_flags, PIM_RPT_BIT_MASK)) { | |
69 | if (PIM_DEBUG_PIM_J_P) | |
70 | zlog_debug( | |
71 | "Discarding (*,G)=%pSG join since WC bit is set but RPT bit is unset", | |
72 | sg); | |
73 | ||
74 | return; | |
75 | } | |
76 | ||
fec883d9 | 77 | struct pim_rpf *rp = RP(pim_ifp->pim, sg->grp); |
c631920c | 78 | pim_addr rpf_addr; |
d62a17ae | 79 | |
b1945363 | 80 | if (!rp) { |
6fff2cc6 DL |
81 | zlog_warn("%s: Lookup of RP failed for %pSG", __func__, |
82 | sg); | |
b1945363 DS |
83 | return; |
84 | } | |
d62a17ae | 85 | /* |
86 | * If the RP sent in the message is not | |
87 | * our RP for the group, drop the message | |
88 | */ | |
fc9f6f88 | 89 | rpf_addr = rp->rpf_addr; |
c631920c | 90 | if (pim_addr_cmp(sg->src, rpf_addr)) { |
15569c58 | 91 | zlog_warn( |
c631920c DL |
92 | "%s: Specified RP(%pPAs) in join is different than our configured RP(%pPAs)", |
93 | __func__, &sg->src, &rpf_addr); | |
d62a17ae | 94 | return; |
a57103e9 | 95 | } |
d62a17ae | 96 | |
34abbcc4 SG |
97 | if (pim_is_grp_ssm(pim_ifp->pim, sg->grp)) { |
98 | zlog_warn( | |
6d7bf748 | 99 | "%s: Specified Group(%pPA) in join is now in SSM, not allowed to create PIM state", |
38c848c9 | 100 | __func__, &sg->grp); |
34abbcc4 SG |
101 | return; |
102 | } | |
103 | ||
bca160c6 | 104 | sg->src = PIMADDR_ANY; |
d62a17ae | 105 | } |
106 | ||
107 | /* Restart join expiry timer */ | |
108 | pim_ifchannel_join_add(ifp, neigh->source_addr, upstream, sg, | |
109 | source_flags, holdtime); | |
12e41d03 DL |
110 | } |
111 | ||
d62a17ae | 112 | static void recv_prune(struct interface *ifp, struct pim_neighbor *neigh, |
01adb431 DL |
113 | uint16_t holdtime, pim_addr upstream, pim_sgaddr *sg, |
114 | uint8_t source_flags) | |
12e41d03 | 115 | { |
d62a17ae | 116 | struct pim_interface *pim_ifp = NULL; |
117 | ||
01adb431 | 118 | if (PIM_DEBUG_PIM_TRACE) |
9bb93fa0 | 119 | zlog_debug( |
01adb431 | 120 | "%s: prune (S,G)=%pSG rpt=%d wc=%d upstream=%pPAs holdtime=%d from %pPA on %s", |
9bb93fa0 | 121 | __func__, sg, source_flags & PIM_RPT_BIT_MASK, |
01adb431 DL |
122 | source_flags & PIM_WILDCARD_BIT_MASK, &upstream, |
123 | holdtime, &neigh->source_addr, ifp->name); | |
d62a17ae | 124 | |
125 | pim_ifp = ifp->info; | |
df5dfb77 | 126 | assert(pim_ifp); |
d62a17ae | 127 | |
128 | ++pim_ifp->pim_ifstat_prune_recv; | |
129 | ||
a23a485c MR |
130 | if (CHECK_FLAG(source_flags, PIM_WILDCARD_BIT_MASK)) { |
131 | /* As per RFC 7761 Section 4.9.1: | |
132 | * The RPT (or Rendezvous Point Tree) bit is a 1-bit value for | |
133 | * use with PIM Join/Prune messages (see Section 4.9.5.1). If | |
134 | * the WC bit is 1, the RPT bit MUST be 1. | |
135 | */ | |
136 | if (!CHECK_FLAG(source_flags, PIM_RPT_BIT_MASK)) { | |
137 | if (PIM_DEBUG_PIM_J_P) | |
138 | zlog_debug( | |
139 | "Discarding (*,G)=%pSG prune since WC bit is set but RPT bit is unset", | |
140 | sg); | |
141 | ||
142 | return; | |
143 | } | |
144 | ||
5c777da8 | 145 | /* |
146 | * RFC 4601 Section 4.5.2: | |
147 | * Received Prune(*,G) messages are processed even if the | |
148 | * RP in the message does not match RP(G). | |
149 | */ | |
8e8be741 DL |
150 | if (PIM_DEBUG_PIM_TRACE) |
151 | zlog_debug("%s: Prune received with RP(%pPAs) for %pSG", | |
152 | __func__, &sg->src, sg); | |
d62a17ae | 153 | |
bca160c6 | 154 | sg->src = PIMADDR_ANY; |
d62a17ae | 155 | } |
156 | ||
157 | pim_ifchannel_prune(ifp, upstream, sg, source_flags, holdtime); | |
12e41d03 DL |
158 | } |
159 | ||
d62a17ae | 160 | int pim_joinprune_recv(struct interface *ifp, struct pim_neighbor *neigh, |
17280eee | 161 | pim_addr src_addr, uint8_t *tlv_buf, int tlv_buf_size) |
12e41d03 | 162 | { |
0d360092 DL |
163 | pim_addr msg_upstream_addr; |
164 | bool wrong_af = false; | |
b0f525a8 | 165 | struct pim_interface *pim_ifp; |
d62a17ae | 166 | uint8_t msg_num_groups; |
167 | uint16_t msg_holdtime; | |
168 | int addr_offset; | |
169 | uint8_t *buf; | |
170 | uint8_t *pastend; | |
171 | int remain; | |
172 | int group; | |
fa8c500f SP |
173 | struct pim_ifchannel *child = NULL; |
174 | struct listnode *ch_node, *nch_node; | |
d62a17ae | 175 | |
176 | buf = tlv_buf; | |
177 | pastend = tlv_buf + tlv_buf_size; | |
b0f525a8 | 178 | pim_ifp = ifp->info; |
d62a17ae | 179 | |
b9695c6d | 180 | if (pim_ifp->pim_passive_enable) { |
181 | if (PIM_DEBUG_PIM_PACKETS) | |
182 | zlog_debug( | |
183 | "skip receiving PIM message on passive interface %s", | |
184 | ifp->name); | |
185 | return 0; | |
186 | } | |
187 | ||
d62a17ae | 188 | /* |
189 | Parse ucast addr | |
190 | */ | |
0d360092 DL |
191 | addr_offset = pim_parse_addr_ucast(&msg_upstream_addr, buf, |
192 | pastend - buf, &wrong_af); | |
d62a17ae | 193 | if (addr_offset < 1) { |
17280eee MR |
194 | zlog_warn("%s: pim_parse_addr_ucast() failure: from %pPA on %s", |
195 | __func__, &src_addr, ifp->name); | |
d62a17ae | 196 | return -1; |
197 | } | |
198 | buf += addr_offset; | |
199 | ||
200 | /* | |
201 | Check upstream address family | |
202 | */ | |
0d360092 | 203 | if (wrong_af) { |
15569c58 | 204 | zlog_warn( |
17280eee MR |
205 | "%s: ignoring join/prune directed to unexpected addr family from %pPA on %s", |
206 | __func__, &src_addr, ifp->name); | |
d62a17ae | 207 | return -2; |
208 | } | |
209 | ||
210 | remain = pastend - buf; | |
211 | if (remain < 4) { | |
d62a17ae | 212 | zlog_warn( |
17280eee MR |
213 | "%s: short join/prune message buffer for group list: size=%d minimum=%d from %pPA on %s", |
214 | __func__, remain, 4, &src_addr, ifp->name); | |
d62a17ae | 215 | return -4; |
216 | } | |
217 | ||
218 | ++buf; /* skip reserved byte */ | |
219 | msg_num_groups = *(const uint8_t *)buf; | |
220 | ++buf; | |
221 | msg_holdtime = ntohs(*(const uint16_t *)buf); | |
222 | ++buf; | |
223 | ++buf; | |
224 | ||
17280eee | 225 | if (PIM_DEBUG_PIM_J_P) |
d62a17ae | 226 | zlog_debug( |
17280eee | 227 | "%s: join/prune upstream=%pPAs groups=%d holdtime=%d from %pPA on %s", |
0d360092 | 228 | __func__, &msg_upstream_addr, msg_num_groups, |
17280eee | 229 | msg_holdtime, &src_addr, ifp->name); |
d62a17ae | 230 | |
231 | /* Scan groups */ | |
232 | for (group = 0; group < msg_num_groups; ++group) { | |
6fff2cc6 | 233 | pim_sgaddr sg; |
d62a17ae | 234 | uint8_t msg_source_flags; |
235 | uint16_t msg_num_joined_sources; | |
236 | uint16_t msg_num_pruned_sources; | |
237 | int source; | |
238 | struct pim_ifchannel *starg_ch = NULL, *sg_ch = NULL; | |
b0f525a8 | 239 | bool filtered = false; |
d62a17ae | 240 | |
6fff2cc6 | 241 | memset(&sg, 0, sizeof(sg)); |
d62a17ae | 242 | addr_offset = pim_parse_addr_group(&sg, buf, pastend - buf); |
243 | if (addr_offset < 1) { | |
244 | return -5; | |
245 | } | |
246 | buf += addr_offset; | |
247 | ||
248 | remain = pastend - buf; | |
249 | if (remain < 4) { | |
d62a17ae | 250 | zlog_warn( |
17280eee MR |
251 | "%s: short join/prune buffer for source list: size=%d minimum=%d from %pPA on %s", |
252 | __func__, remain, 4, &src_addr, ifp->name); | |
d62a17ae | 253 | return -6; |
254 | } | |
255 | ||
256 | msg_num_joined_sources = ntohs(*(const uint16_t *)buf); | |
257 | buf += 2; | |
258 | msg_num_pruned_sources = ntohs(*(const uint16_t *)buf); | |
259 | buf += 2; | |
260 | ||
17280eee | 261 | if (PIM_DEBUG_PIM_J_P) |
fb9670aa | 262 | zlog_debug( |
17280eee | 263 | "%s: join/prune upstream=%pPAs group=%pPA/32 join_src=%d prune_src=%d from %pPA on %s", |
0d360092 | 264 | __func__, &msg_upstream_addr, &sg.grp, |
d62a17ae | 265 | msg_num_joined_sources, msg_num_pruned_sources, |
17280eee | 266 | &src_addr, ifp->name); |
d62a17ae | 267 | |
b0f525a8 QY |
268 | /* boundary check */ |
269 | filtered = pim_is_group_filtered(pim_ifp, &sg.grp); | |
270 | ||
d62a17ae | 271 | /* Scan joined sources */ |
272 | for (source = 0; source < msg_num_joined_sources; ++source) { | |
273 | addr_offset = pim_parse_addr_source( | |
274 | &sg, &msg_source_flags, buf, pastend - buf); | |
275 | if (addr_offset < 1) { | |
276 | return -7; | |
277 | } | |
278 | ||
279 | buf += addr_offset; | |
280 | ||
b0f525a8 QY |
281 | /* if we are filtering this group, skip the join */ |
282 | if (filtered) | |
283 | continue; | |
284 | ||
0d360092 DL |
285 | recv_join(ifp, neigh, msg_holdtime, msg_upstream_addr, |
286 | &sg, msg_source_flags); | |
d62a17ae | 287 | |
2a27f13b | 288 | if (pim_addr_is_any(sg.src)) { |
d62a17ae | 289 | starg_ch = pim_ifchannel_find(ifp, &sg); |
290 | if (starg_ch) | |
291 | pim_ifchannel_set_star_g_join_state( | |
c206937b | 292 | starg_ch, 0, 1); |
d62a17ae | 293 | } |
294 | } | |
295 | ||
296 | /* Scan pruned sources */ | |
297 | for (source = 0; source < msg_num_pruned_sources; ++source) { | |
298 | addr_offset = pim_parse_addr_source( | |
299 | &sg, &msg_source_flags, buf, pastend - buf); | |
300 | if (addr_offset < 1) { | |
301 | return -8; | |
302 | } | |
303 | ||
d62a17ae | 304 | buf += addr_offset; |
b0f525a8 QY |
305 | |
306 | /* if we are filtering this group, skip the prune */ | |
307 | if (filtered) | |
308 | continue; | |
309 | ||
0d360092 DL |
310 | recv_prune(ifp, neigh, msg_holdtime, msg_upstream_addr, |
311 | &sg, msg_source_flags); | |
8e7a4c6e DS |
312 | /* |
313 | * So if we are receiving a S,G,RPT prune | |
314 | * before we have any data for that S,G | |
315 | * We need to retrieve the sg_ch after | |
316 | * we parse the prune. | |
317 | */ | |
318 | sg_ch = pim_ifchannel_find(ifp, &sg); | |
319 | ||
fa8c500f SP |
320 | if (!sg_ch) |
321 | continue; | |
322 | ||
323 | /* (*,G) prune received */ | |
324 | for (ALL_LIST_ELEMENTS(sg_ch->sources, ch_node, | |
325 | nch_node, child)) { | |
326 | if (PIM_IF_FLAG_TEST_S_G_RPT(child->flags)) { | |
327 | if (child->ifjoin_state | |
328 | == PIM_IFJOIN_PRUNE_PENDING_TMP) | |
e16d030c | 329 | EVENT_OFF( |
fa8c500f | 330 | child->t_ifjoin_prune_pending_timer); |
e16d030c | 331 | EVENT_OFF(child->t_ifjoin_expiry_timer); |
fa8c500f SP |
332 | PIM_IF_FLAG_UNSET_S_G_RPT(child->flags); |
333 | child->ifjoin_state = PIM_IFJOIN_NOINFO; | |
99f9518b | 334 | delete_on_noinfo(child); |
fa8c500f SP |
335 | } |
336 | } | |
337 | ||
d62a17ae | 338 | /* Received SG-RPT Prune delete oif from specific S,G */ |
fa8c500f | 339 | if (starg_ch && (msg_source_flags & PIM_RPT_BIT_MASK) |
d62a17ae | 340 | && !(msg_source_flags & PIM_WILDCARD_BIT_MASK)) { |
341 | struct pim_upstream *up = sg_ch->upstream; | |
342 | PIM_IF_FLAG_SET_S_G_RPT(sg_ch->flags); | |
343 | if (up) { | |
23fc858a | 344 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 345 | zlog_debug( |
346 | "%s: SGRpt flag is set, del inherit oif from up %s", | |
15569c58 | 347 | __func__, up->sg_str); |
1537a668 | 348 | pim_channel_del_inherited_oif( |
d62a17ae | 349 | up->channel_oil, |
350 | starg_ch->interface, | |
1b249e70 | 351 | __func__); |
d62a17ae | 352 | } |
353 | } | |
354 | } | |
b0f525a8 | 355 | if (starg_ch && !filtered) |
c206937b | 356 | pim_ifchannel_set_star_g_join_state(starg_ch, 1, 0); |
d62a17ae | 357 | starg_ch = NULL; |
358 | } /* scan groups */ | |
359 | ||
360 | return 0; | |
12e41d03 DL |
361 | } |
362 | ||
982bff89 DS |
363 | /* |
364 | * J/P Message Format | |
365 | * | |
366 | * While the RFC clearly states that this is 32 bits wide, it | |
367 | * is cheating. These fields: | |
368 | * Encoded-Unicast format (6 bytes MIN) | |
369 | * Encoded-Group format (8 bytes MIN) | |
370 | * Encoded-Source format (8 bytes MIN) | |
371 | * are *not* 32 bits wide. | |
372 | * | |
373 | * Nor does the RFC explicitly call out the size for: | |
374 | * Reserved (1 byte) | |
375 | * Num Groups (1 byte) | |
376 | * Holdtime (2 bytes) | |
377 | * Number of Joined Sources (2 bytes) | |
378 | * Number of Pruned Sources (2 bytes) | |
379 | * | |
380 | * This leads to a missleading representation from casual | |
381 | * reading and making assumptions. Be careful! | |
382 | * | |
383 | * 0 1 2 3 | |
384 | * 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 | |
385 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
386 | * |PIM Ver| Type | Reserved | Checksum | | |
387 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
388 | * | Upstream Neighbor Address (Encoded-Unicast format) | | |
389 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
390 | * | Reserved | Num groups | Holdtime | | |
391 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
392 | * | Multicast Group Address 1 (Encoded-Group format) | | |
393 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
394 | * | Number of Joined Sources | Number of Pruned Sources | | |
395 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
396 | * | Joined Source Address 1 (Encoded-Source format) | | |
397 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
398 | * | . | | |
399 | * | . | | |
400 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
401 | * | Joined Source Address n (Encoded-Source format) | | |
402 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
403 | * | Pruned Source Address 1 (Encoded-Source format) | | |
404 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
405 | * | . | | |
406 | * | . | | |
407 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
408 | * | Pruned Source Address n (Encoded-Source format) | | |
409 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
410 | * | Multicast Group Address m (Encoded-Group format) | | |
411 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
412 | * | Number of Joined Sources | Number of Pruned Sources | | |
413 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
414 | * | Joined Source Address 1 (Encoded-Source format) | | |
415 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
416 | * | . | | |
417 | * | . | | |
418 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
419 | * | Joined Source Address n (Encoded-Source format) | | |
420 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
421 | * | Pruned Source Address 1 (Encoded-Source format) | | |
422 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
423 | * | . | | |
424 | * | . | | |
425 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
426 | * | Pruned Source Address n (Encoded-Source format) | | |
427 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
428 | */ | |
d62a17ae | 429 | int pim_joinprune_send(struct pim_rpf *rpf, struct list *groups) |
12e41d03 | 430 | { |
d62a17ae | 431 | struct pim_jp_agg_group *group; |
432 | struct pim_interface *pim_ifp = NULL; | |
433 | struct pim_jp_groups *grp = NULL; | |
a97986ff | 434 | struct pim_jp *msg = NULL; |
d62a17ae | 435 | struct listnode *node, *nnode; |
436 | uint8_t pim_msg[10000]; | |
437 | uint8_t *curr_ptr = pim_msg; | |
438 | bool new_packet = true; | |
439 | size_t packet_left = 0; | |
440 | size_t packet_size = 0; | |
441 | size_t group_size = 0; | |
442 | ||
d62a17ae | 443 | if (rpf->source_nexthop.interface) |
444 | pim_ifp = rpf->source_nexthop.interface->info; | |
445 | else { | |
5e81f5dd | 446 | zlog_warn("%s: RPF interface is not present", __func__); |
d62a17ae | 447 | return -1; |
448 | } | |
449 | ||
042a7541 | 450 | |
fc9f6f88 | 451 | on_trace(__func__, rpf->source_nexthop.interface, rpf->rpf_addr); |
957d93ea | 452 | |
d62a17ae | 453 | if (!pim_ifp) { |
5e81f5dd | 454 | zlog_warn("%s: multicast not enabled on interface %s", __func__, |
d62a17ae | 455 | rpf->source_nexthop.interface->name); |
456 | return -1; | |
457 | } | |
458 | ||
fc9f6f88 | 459 | if (pim_addr_is_any(rpf->rpf_addr)) { |
042a7541 DL |
460 | if (PIM_DEBUG_PIM_J_P) |
461 | zlog_debug( | |
462 | "%s: upstream=%pPA is myself on interface %s", | |
fc9f6f88 | 463 | __func__, &rpf->rpf_addr, |
042a7541 | 464 | rpf->source_nexthop.interface->name); |
d62a17ae | 465 | return 0; |
466 | } | |
467 | ||
468 | /* | |
469 | RFC 4601: 4.3.1. Sending Hello Messages | |
470 | ||
471 | Thus, if a router needs to send a Join/Prune or Assert message on | |
472 | an interface on which it has not yet sent a Hello message with the | |
473 | currently configured IP address, then it MUST immediately send the | |
474 | relevant Hello message without waiting for the Hello Timer to | |
475 | expire, followed by the Join/Prune or Assert message. | |
476 | */ | |
477 | pim_hello_require(rpf->source_nexthop.interface); | |
478 | ||
479 | for (ALL_LIST_ELEMENTS(groups, node, nnode, group)) { | |
480 | if (new_packet) { | |
481 | msg = (struct pim_jp *)pim_msg; | |
482 | ||
483 | memset(msg, 0, sizeof(*msg)); | |
484 | ||
042a7541 | 485 | pim_msg_addr_encode_ucast((uint8_t *)&msg->addr, |
fc9f6f88 | 486 | rpf->rpf_addr); |
d62a17ae | 487 | msg->reserved = 0; |
488 | msg->holdtime = htons(PIM_JP_HOLDTIME); | |
489 | ||
490 | new_packet = false; | |
491 | ||
492 | grp = &msg->groups[0]; | |
493 | curr_ptr = (uint8_t *)grp; | |
494 | packet_size = sizeof(struct pim_msg_header); | |
16763d77 | 495 | packet_size += sizeof(pim_encoded_unicast); |
d62a17ae | 496 | packet_size += |
497 | 4; // reserved (1) + groups (1) + holdtime (2) | |
498 | ||
499 | packet_left = rpf->source_nexthop.interface->mtu - 24; | |
500 | packet_left -= packet_size; | |
501 | } | |
042a7541 | 502 | if (PIM_DEBUG_PIM_J_P) |
d62a17ae | 503 | zlog_debug( |
042a7541 | 504 | "%s: sending (G)=%pPAs to upstream=%pPA on interface %s", |
fc9f6f88 | 505 | __func__, &group->group, &rpf->rpf_addr, |
d62a17ae | 506 | rpf->source_nexthop.interface->name); |
d62a17ae | 507 | |
508 | group_size = pim_msg_get_jp_group_size(group->sources); | |
509 | if (group_size > packet_left) { | |
145e4c38 DL |
510 | pim_msg_build_header(pim_ifp->primary_address, |
511 | qpim_all_pim_routers_addr, pim_msg, | |
512 | packet_size, | |
d57a8bbf | 513 | PIM_MSG_TYPE_JOIN_PRUNE, false); |
d62a17ae | 514 | if (pim_msg_send(pim_ifp->pim_sock_fd, |
515 | pim_ifp->primary_address, | |
516 | qpim_all_pim_routers_addr, pim_msg, | |
517 | packet_size, | |
22870562 | 518 | rpf->source_nexthop.interface)) { |
d62a17ae | 519 | zlog_warn( |
520 | "%s: could not send PIM message on interface %s", | |
5e81f5dd | 521 | __func__, |
d62a17ae | 522 | rpf->source_nexthop.interface->name); |
523 | } | |
524 | ||
525 | msg = (struct pim_jp *)pim_msg; | |
526 | memset(msg, 0, sizeof(*msg)); | |
527 | ||
042a7541 | 528 | pim_msg_addr_encode_ucast((uint8_t *)&msg->addr, |
fc9f6f88 | 529 | rpf->rpf_addr); |
d62a17ae | 530 | msg->reserved = 0; |
531 | msg->holdtime = htons(PIM_JP_HOLDTIME); | |
532 | ||
533 | new_packet = false; | |
534 | ||
535 | grp = &msg->groups[0]; | |
536 | curr_ptr = (uint8_t *)grp; | |
537 | packet_size = sizeof(struct pim_msg_header); | |
16763d77 | 538 | packet_size += sizeof(pim_encoded_unicast); |
d62a17ae | 539 | packet_size += |
540 | 4; // reserved (1) + groups (1) + holdtime (2) | |
541 | ||
542 | packet_left = rpf->source_nexthop.interface->mtu - 24; | |
543 | packet_left -= packet_size; | |
544 | } | |
545 | ||
546 | msg->num_groups++; | |
547 | /* | |
548 | Build PIM message | |
549 | */ | |
550 | ||
551 | curr_ptr += group_size; | |
552 | packet_left -= group_size; | |
553 | packet_size += group_size; | |
554 | pim_msg_build_jp_groups(grp, group, group_size); | |
555 | ||
22870562 | 556 | if (!pim_ifp->pim_passive_enable) { |
557 | pim_ifp->pim_ifstat_join_send += ntohs(grp->joins); | |
558 | pim_ifp->pim_ifstat_prune_send += ntohs(grp->prunes); | |
559 | } | |
d62a17ae | 560 | |
561 | if (PIM_DEBUG_PIM_TRACE) | |
562 | zlog_debug( | |
563 | "%s: interface %s num_joins %u num_prunes %u", | |
5e81f5dd | 564 | __func__, rpf->source_nexthop.interface->name, |
d62a17ae | 565 | ntohs(grp->joins), ntohs(grp->prunes)); |
566 | ||
567 | grp = (struct pim_jp_groups *)curr_ptr; | |
568 | if (packet_left < sizeof(struct pim_jp_groups) | |
569 | || msg->num_groups == 255) { | |
145e4c38 DL |
570 | pim_msg_build_header(pim_ifp->primary_address, |
571 | qpim_all_pim_routers_addr, pim_msg, | |
572 | packet_size, | |
d57a8bbf | 573 | PIM_MSG_TYPE_JOIN_PRUNE, false); |
d62a17ae | 574 | if (pim_msg_send(pim_ifp->pim_sock_fd, |
575 | pim_ifp->primary_address, | |
576 | qpim_all_pim_routers_addr, pim_msg, | |
577 | packet_size, | |
22870562 | 578 | rpf->source_nexthop.interface)) { |
d62a17ae | 579 | zlog_warn( |
580 | "%s: could not send PIM message on interface %s", | |
5e81f5dd | 581 | __func__, |
d62a17ae | 582 | rpf->source_nexthop.interface->name); |
583 | } | |
584 | ||
585 | new_packet = true; | |
586 | } | |
587 | } | |
588 | ||
589 | ||
590 | if (!new_packet) { | |
591 | // msg->num_groups = htons (msg->num_groups); | |
145e4c38 DL |
592 | pim_msg_build_header( |
593 | pim_ifp->primary_address, qpim_all_pim_routers_addr, | |
594 | pim_msg, packet_size, PIM_MSG_TYPE_JOIN_PRUNE, false); | |
d62a17ae | 595 | if (pim_msg_send(pim_ifp->pim_sock_fd, pim_ifp->primary_address, |
596 | qpim_all_pim_routers_addr, pim_msg, | |
22870562 | 597 | packet_size, rpf->source_nexthop.interface)) { |
d62a17ae | 598 | zlog_warn( |
599 | "%s: could not send PIM message on interface %s", | |
5e81f5dd | 600 | __func__, rpf->source_nexthop.interface->name); |
d62a17ae | 601 | } |
602 | } | |
603 | return 0; | |
12e41d03 | 604 | } |