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