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Commit | Line | Data |
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12e41d03 | 1 | /* |
896014f4 DL |
2 | * PIM for Quagga |
3 | * Copyright (C) 2008 Everton da Silva Marques | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; see the file COPYING; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
12e41d03 DL |
19 | |
20 | #include <zebra.h> | |
21 | ||
22 | #include "log.h" | |
23 | #include "prefix.h" | |
744d91b3 | 24 | #include "if.h" |
dfe43e25 DW |
25 | #include "vty.h" |
26 | #include "plist.h" | |
12e41d03 DL |
27 | |
28 | #include "pimd.h" | |
29 | #include "pim_str.h" | |
30 | #include "pim_tlv.h" | |
31 | #include "pim_msg.h" | |
32 | #include "pim_pim.h" | |
33 | #include "pim_join.h" | |
3667b0bc | 34 | #include "pim_oil.h" |
12e41d03 DL |
35 | #include "pim_iface.h" |
36 | #include "pim_hello.h" | |
37 | #include "pim_ifchannel.h" | |
6c629103 DS |
38 | #include "pim_rpf.h" |
39 | #include "pim_rp.h" | |
982bff89 | 40 | #include "pim_jp_agg.h" |
12e41d03 | 41 | |
d62a17ae | 42 | static void on_trace(const char *label, struct interface *ifp, |
43 | struct in_addr src) | |
12e41d03 | 44 | { |
d62a17ae | 45 | if (PIM_DEBUG_PIM_TRACE) { |
46 | char src_str[INET_ADDRSTRLEN]; | |
47 | pim_inet4_dump("<src?>", src, src_str, sizeof(src_str)); | |
48 | zlog_debug("%s: from %s on %s", label, src_str, ifp->name); | |
49 | } | |
12e41d03 DL |
50 | } |
51 | ||
d62a17ae | 52 | static void recv_join(struct interface *ifp, struct pim_neighbor *neigh, |
53 | uint16_t holdtime, struct in_addr upstream, | |
54 | struct prefix_sg *sg, uint8_t source_flags) | |
12e41d03 | 55 | { |
d62a17ae | 56 | struct pim_interface *pim_ifp = NULL; |
57 | ||
58 | if (PIM_DEBUG_PIM_TRACE) { | |
59 | char up_str[INET_ADDRSTRLEN]; | |
60 | char neigh_str[INET_ADDRSTRLEN]; | |
61 | pim_inet4_dump("<upstream?>", upstream, up_str, sizeof(up_str)); | |
62 | pim_inet4_dump("<neigh?>", neigh->source_addr, neigh_str, | |
63 | sizeof(neigh_str)); | |
64 | zlog_warn( | |
65 | "%s: join (S,G)=%s rpt=%d wc=%d upstream=%s holdtime=%d from %s on %s", | |
66 | __PRETTY_FUNCTION__, pim_str_sg_dump(sg), | |
67 | source_flags & PIM_RPT_BIT_MASK, | |
68 | source_flags & PIM_WILDCARD_BIT_MASK, up_str, holdtime, | |
69 | neigh_str, ifp->name); | |
70 | } | |
71 | ||
72 | pim_ifp = ifp->info; | |
73 | zassert(pim_ifp); | |
74 | ||
75 | ++pim_ifp->pim_ifstat_join_recv; | |
76 | ||
77 | /* | |
78 | * If the RPT and WC are set it's a (*,G) | |
79 | * and the source is the RP | |
80 | */ | |
81 | if ((source_flags & PIM_RPT_BIT_MASK) | |
82 | && (source_flags & PIM_WILDCARD_BIT_MASK)) { | |
83 | struct pim_rpf *rp = RP(sg->grp); | |
84 | ||
85 | /* | |
86 | * If the RP sent in the message is not | |
87 | * our RP for the group, drop the message | |
88 | */ | |
89 | if (sg->src.s_addr != rp->rpf_addr.u.prefix4.s_addr) | |
90 | return; | |
91 | ||
92 | sg->src.s_addr = INADDR_ANY; | |
93 | } | |
94 | ||
95 | /* Restart join expiry timer */ | |
96 | pim_ifchannel_join_add(ifp, neigh->source_addr, upstream, sg, | |
97 | source_flags, holdtime); | |
12e41d03 DL |
98 | } |
99 | ||
d62a17ae | 100 | static void recv_prune(struct interface *ifp, struct pim_neighbor *neigh, |
101 | uint16_t holdtime, struct in_addr upstream, | |
102 | struct prefix_sg *sg, uint8_t source_flags) | |
12e41d03 | 103 | { |
d62a17ae | 104 | struct pim_interface *pim_ifp = NULL; |
105 | ||
106 | if (PIM_DEBUG_PIM_TRACE) { | |
107 | char up_str[INET_ADDRSTRLEN]; | |
108 | char neigh_str[INET_ADDRSTRLEN]; | |
109 | pim_inet4_dump("<upstream?>", upstream, up_str, sizeof(up_str)); | |
110 | pim_inet4_dump("<neigh?>", neigh->source_addr, neigh_str, | |
111 | sizeof(neigh_str)); | |
112 | zlog_warn( | |
113 | "%s: prune (S,G)=%s rpt=%d wc=%d upstream=%s holdtime=%d from %s on %s", | |
114 | __PRETTY_FUNCTION__, pim_str_sg_dump(sg), | |
115 | source_flags & PIM_RPT_BIT_MASK, | |
116 | source_flags & PIM_WILDCARD_BIT_MASK, up_str, holdtime, | |
117 | neigh_str, ifp->name); | |
118 | } | |
119 | ||
120 | pim_ifp = ifp->info; | |
121 | zassert(pim_ifp); | |
122 | ||
123 | ++pim_ifp->pim_ifstat_prune_recv; | |
124 | ||
125 | if ((source_flags & PIM_RPT_BIT_MASK) | |
126 | && (source_flags & PIM_WILDCARD_BIT_MASK)) { | |
127 | struct pim_rpf *rp = RP(sg->grp); | |
128 | ||
129 | // Ignoring Prune *,G's at the moment. | |
130 | if (sg->src.s_addr != rp->rpf_addr.u.prefix4.s_addr) | |
131 | return; | |
132 | ||
133 | sg->src.s_addr = INADDR_ANY; | |
134 | } | |
135 | ||
136 | pim_ifchannel_prune(ifp, upstream, sg, source_flags, holdtime); | |
12e41d03 DL |
137 | } |
138 | ||
d62a17ae | 139 | int pim_joinprune_recv(struct interface *ifp, struct pim_neighbor *neigh, |
140 | struct in_addr src_addr, uint8_t *tlv_buf, | |
141 | int tlv_buf_size) | |
12e41d03 | 142 | { |
d62a17ae | 143 | struct prefix msg_upstream_addr; |
144 | uint8_t msg_num_groups; | |
145 | uint16_t msg_holdtime; | |
146 | int addr_offset; | |
147 | uint8_t *buf; | |
148 | uint8_t *pastend; | |
149 | int remain; | |
150 | int group; | |
151 | ||
152 | buf = tlv_buf; | |
153 | pastend = tlv_buf + tlv_buf_size; | |
154 | ||
155 | /* | |
156 | Parse ucast addr | |
157 | */ | |
158 | addr_offset = | |
159 | pim_parse_addr_ucast(&msg_upstream_addr, buf, pastend - buf); | |
160 | if (addr_offset < 1) { | |
161 | char src_str[INET_ADDRSTRLEN]; | |
162 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); | |
163 | zlog_warn("%s: pim_parse_addr_ucast() failure: from %s on %s", | |
164 | __PRETTY_FUNCTION__, src_str, ifp->name); | |
165 | return -1; | |
166 | } | |
167 | buf += addr_offset; | |
168 | ||
169 | /* | |
170 | Check upstream address family | |
171 | */ | |
172 | if (msg_upstream_addr.family != AF_INET) { | |
173 | if (PIM_DEBUG_PIM_J_P) { | |
174 | char src_str[INET_ADDRSTRLEN]; | |
175 | pim_inet4_dump("<src?>", src_addr, src_str, | |
176 | sizeof(src_str)); | |
177 | zlog_warn( | |
178 | "%s: ignoring join/prune directed to unexpected addr family=%d from %s on %s", | |
179 | __PRETTY_FUNCTION__, msg_upstream_addr.family, | |
180 | src_str, ifp->name); | |
181 | } | |
182 | return -2; | |
183 | } | |
184 | ||
185 | remain = pastend - buf; | |
186 | if (remain < 4) { | |
187 | char src_str[INET_ADDRSTRLEN]; | |
188 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); | |
189 | zlog_warn( | |
190 | "%s: short join/prune message buffer for group list: size=%d minimum=%d from %s on %s", | |
191 | __PRETTY_FUNCTION__, remain, 4, src_str, ifp->name); | |
192 | return -4; | |
193 | } | |
194 | ||
195 | ++buf; /* skip reserved byte */ | |
196 | msg_num_groups = *(const uint8_t *)buf; | |
197 | ++buf; | |
198 | msg_holdtime = ntohs(*(const uint16_t *)buf); | |
199 | ++buf; | |
200 | ++buf; | |
201 | ||
202 | if (PIM_DEBUG_PIM_J_P) { | |
203 | char src_str[INET_ADDRSTRLEN]; | |
204 | char upstream_str[INET_ADDRSTRLEN]; | |
205 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); | |
206 | pim_inet4_dump("<addr?>", msg_upstream_addr.u.prefix4, | |
207 | upstream_str, sizeof(upstream_str)); | |
208 | zlog_debug( | |
209 | "%s: join/prune upstream=%s groups=%d holdtime=%d from %s on %s", | |
210 | __PRETTY_FUNCTION__, upstream_str, msg_num_groups, | |
211 | msg_holdtime, src_str, ifp->name); | |
212 | } | |
213 | ||
214 | /* Scan groups */ | |
215 | for (group = 0; group < msg_num_groups; ++group) { | |
216 | struct prefix_sg sg; | |
217 | uint8_t msg_source_flags; | |
218 | uint16_t msg_num_joined_sources; | |
219 | uint16_t msg_num_pruned_sources; | |
220 | int source; | |
221 | struct pim_ifchannel *starg_ch = NULL, *sg_ch = NULL; | |
222 | uint8_t starg_alone = 0; | |
223 | ||
224 | memset(&sg, 0, sizeof(struct prefix_sg)); | |
225 | addr_offset = pim_parse_addr_group(&sg, buf, pastend - buf); | |
226 | if (addr_offset < 1) { | |
227 | return -5; | |
228 | } | |
229 | buf += addr_offset; | |
230 | ||
231 | remain = pastend - buf; | |
232 | if (remain < 4) { | |
233 | char src_str[INET_ADDRSTRLEN]; | |
234 | pim_inet4_dump("<src?>", src_addr, src_str, | |
235 | sizeof(src_str)); | |
236 | zlog_warn( | |
237 | "%s: short join/prune buffer for source list: size=%d minimum=%d from %s on %s", | |
238 | __PRETTY_FUNCTION__, remain, 4, src_str, | |
239 | ifp->name); | |
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 | ||
248 | if (PIM_DEBUG_PIM_J_P) { | |
249 | char src_str[INET_ADDRSTRLEN]; | |
250 | char upstream_str[INET_ADDRSTRLEN]; | |
251 | char group_str[INET_ADDRSTRLEN]; | |
252 | pim_inet4_dump("<src?>", src_addr, src_str, | |
253 | sizeof(src_str)); | |
254 | pim_inet4_dump("<addr?>", msg_upstream_addr.u.prefix4, | |
255 | upstream_str, sizeof(upstream_str)); | |
256 | pim_inet4_dump("<grp?>", sg.grp, group_str, | |
257 | sizeof(group_str)); | |
258 | zlog_warn( | |
259 | "%s: join/prune upstream=%s group=%s/32 join_src=%d prune_src=%d from %s on %s", | |
260 | __PRETTY_FUNCTION__, upstream_str, group_str, | |
261 | msg_num_joined_sources, msg_num_pruned_sources, | |
262 | src_str, ifp->name); | |
263 | } | |
264 | ||
265 | /* Scan joined sources */ | |
266 | for (source = 0; source < msg_num_joined_sources; ++source) { | |
267 | addr_offset = pim_parse_addr_source( | |
268 | &sg, &msg_source_flags, buf, pastend - buf); | |
269 | if (addr_offset < 1) { | |
270 | return -7; | |
271 | } | |
272 | ||
273 | buf += addr_offset; | |
274 | ||
275 | recv_join(ifp, neigh, msg_holdtime, | |
276 | msg_upstream_addr.u.prefix4, &sg, | |
277 | msg_source_flags); | |
278 | ||
279 | if (sg.src.s_addr == INADDR_ANY) { | |
280 | starg_alone = 1; | |
281 | starg_ch = pim_ifchannel_find(ifp, &sg); | |
282 | if (starg_ch) | |
283 | pim_ifchannel_set_star_g_join_state( | |
284 | starg_ch, 0, msg_source_flags, | |
285 | 1, starg_alone); | |
286 | } | |
287 | } | |
288 | ||
289 | /* Scan pruned sources */ | |
290 | for (source = 0; source < msg_num_pruned_sources; ++source) { | |
291 | addr_offset = pim_parse_addr_source( | |
292 | &sg, &msg_source_flags, buf, pastend - buf); | |
293 | if (addr_offset < 1) { | |
294 | return -8; | |
295 | } | |
296 | ||
297 | sg_ch = pim_ifchannel_find(ifp, &sg); | |
298 | ||
299 | buf += addr_offset; | |
300 | starg_alone = 0; | |
301 | recv_prune(ifp, neigh, msg_holdtime, | |
302 | msg_upstream_addr.u.prefix4, &sg, | |
303 | msg_source_flags); | |
304 | ||
305 | /* Received SG-RPT Prune delete oif from specific S,G */ | |
306 | if (starg_ch && sg_ch | |
307 | && (msg_source_flags & PIM_RPT_BIT_MASK) | |
308 | && !(msg_source_flags & PIM_WILDCARD_BIT_MASK)) { | |
309 | struct pim_upstream *up = sg_ch->upstream; | |
310 | PIM_IF_FLAG_SET_S_G_RPT(sg_ch->flags); | |
311 | if (up) { | |
312 | if (PIM_DEBUG_TRACE) | |
313 | zlog_debug( | |
314 | "%s: SGRpt flag is set, del inherit oif from up %s", | |
315 | __PRETTY_FUNCTION__, | |
316 | up->sg_str); | |
317 | pim_channel_del_oif( | |
318 | up->channel_oil, | |
319 | starg_ch->interface, | |
320 | PIM_OIF_FLAG_PROTO_STAR); | |
321 | } | |
322 | } | |
323 | } | |
324 | if (starg_ch) | |
325 | pim_ifchannel_set_star_g_join_state( | |
326 | starg_ch, 1, msg_source_flags, 0, starg_alone); | |
327 | starg_ch = NULL; | |
328 | } /* scan groups */ | |
329 | ||
330 | return 0; | |
12e41d03 DL |
331 | } |
332 | ||
982bff89 DS |
333 | /* |
334 | * J/P Message Format | |
335 | * | |
336 | * While the RFC clearly states that this is 32 bits wide, it | |
337 | * is cheating. These fields: | |
338 | * Encoded-Unicast format (6 bytes MIN) | |
339 | * Encoded-Group format (8 bytes MIN) | |
340 | * Encoded-Source format (8 bytes MIN) | |
341 | * are *not* 32 bits wide. | |
342 | * | |
343 | * Nor does the RFC explicitly call out the size for: | |
344 | * Reserved (1 byte) | |
345 | * Num Groups (1 byte) | |
346 | * Holdtime (2 bytes) | |
347 | * Number of Joined Sources (2 bytes) | |
348 | * Number of Pruned Sources (2 bytes) | |
349 | * | |
350 | * This leads to a missleading representation from casual | |
351 | * reading and making assumptions. Be careful! | |
352 | * | |
353 | * 0 1 2 3 | |
354 | * 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 | |
355 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
356 | * |PIM Ver| Type | Reserved | Checksum | | |
357 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
358 | * | Upstream Neighbor Address (Encoded-Unicast format) | | |
359 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
360 | * | Reserved | Num groups | Holdtime | | |
361 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
362 | * | Multicast Group Address 1 (Encoded-Group format) | | |
363 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
364 | * | Number of Joined Sources | Number of Pruned Sources | | |
365 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
366 | * | Joined Source Address 1 (Encoded-Source format) | | |
367 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
368 | * | . | | |
369 | * | . | | |
370 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
371 | * | Joined Source Address n (Encoded-Source format) | | |
372 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
373 | * | Pruned Source Address 1 (Encoded-Source format) | | |
374 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
375 | * | . | | |
376 | * | . | | |
377 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
378 | * | Pruned Source Address n (Encoded-Source format) | | |
379 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
380 | * | Multicast Group Address m (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 | */ | |
d62a17ae | 399 | int pim_joinprune_send(struct pim_rpf *rpf, struct list *groups) |
12e41d03 | 400 | { |
d62a17ae | 401 | struct pim_jp_agg_group *group; |
402 | struct pim_interface *pim_ifp = NULL; | |
403 | struct pim_jp_groups *grp = NULL; | |
404 | struct pim_jp *msg; | |
405 | struct listnode *node, *nnode; | |
406 | uint8_t pim_msg[10000]; | |
407 | uint8_t *curr_ptr = pim_msg; | |
408 | bool new_packet = true; | |
409 | size_t packet_left = 0; | |
410 | size_t packet_size = 0; | |
411 | size_t group_size = 0; | |
412 | ||
413 | on_trace(__PRETTY_FUNCTION__, rpf->source_nexthop.interface, | |
414 | rpf->rpf_addr.u.prefix4); | |
415 | ||
416 | if (rpf->source_nexthop.interface) | |
417 | pim_ifp = rpf->source_nexthop.interface->info; | |
418 | else { | |
419 | zlog_warn("%s: RPF interface is not present", | |
420 | __PRETTY_FUNCTION__); | |
421 | return -1; | |
422 | } | |
423 | ||
424 | if (!pim_ifp) { | |
425 | zlog_warn("%s: multicast not enabled on interface %s", | |
426 | __PRETTY_FUNCTION__, | |
427 | rpf->source_nexthop.interface->name); | |
428 | return -1; | |
429 | } | |
430 | ||
431 | if (PIM_INADDR_IS_ANY(rpf->rpf_addr.u.prefix4)) { | |
432 | if (PIM_DEBUG_PIM_J_P) { | |
433 | char dst_str[INET_ADDRSTRLEN]; | |
434 | pim_inet4_dump("<dst?>", rpf->rpf_addr.u.prefix4, | |
435 | dst_str, sizeof(dst_str)); | |
436 | zlog_debug("%s: upstream=%s is myself on interface %s", | |
437 | __PRETTY_FUNCTION__, dst_str, | |
438 | rpf->source_nexthop.interface->name); | |
439 | } | |
440 | return 0; | |
441 | } | |
442 | ||
443 | /* | |
444 | RFC 4601: 4.3.1. Sending Hello Messages | |
445 | ||
446 | Thus, if a router needs to send a Join/Prune or Assert message on | |
447 | an interface on which it has not yet sent a Hello message with the | |
448 | currently configured IP address, then it MUST immediately send the | |
449 | relevant Hello message without waiting for the Hello Timer to | |
450 | expire, followed by the Join/Prune or Assert message. | |
451 | */ | |
452 | pim_hello_require(rpf->source_nexthop.interface); | |
453 | ||
454 | for (ALL_LIST_ELEMENTS(groups, node, nnode, group)) { | |
455 | if (new_packet) { | |
456 | msg = (struct pim_jp *)pim_msg; | |
457 | ||
458 | memset(msg, 0, sizeof(*msg)); | |
459 | ||
460 | pim_msg_addr_encode_ipv4_ucast((uint8_t *)&msg->addr, | |
461 | rpf->rpf_addr.u.prefix4); | |
462 | msg->reserved = 0; | |
463 | msg->holdtime = htons(PIM_JP_HOLDTIME); | |
464 | ||
465 | new_packet = false; | |
466 | ||
467 | grp = &msg->groups[0]; | |
468 | curr_ptr = (uint8_t *)grp; | |
469 | packet_size = sizeof(struct pim_msg_header); | |
470 | packet_size += sizeof(struct pim_encoded_ipv4_unicast); | |
471 | packet_size += | |
472 | 4; // reserved (1) + groups (1) + holdtime (2) | |
473 | ||
474 | packet_left = rpf->source_nexthop.interface->mtu - 24; | |
475 | packet_left -= packet_size; | |
476 | } | |
477 | if (PIM_DEBUG_PIM_J_P) { | |
478 | char dst_str[INET_ADDRSTRLEN]; | |
479 | char grp_str[INET_ADDRSTRLEN]; | |
480 | pim_inet4_dump("<dst?>", rpf->rpf_addr.u.prefix4, | |
481 | dst_str, sizeof(dst_str)); | |
482 | pim_inet4_dump("<grp?>", group->group, grp_str, | |
483 | sizeof(grp_str)); | |
484 | zlog_debug( | |
485 | "%s: sending (G)=%s to upstream=%s on interface %s", | |
486 | __PRETTY_FUNCTION__, grp_str, dst_str, | |
487 | rpf->source_nexthop.interface->name); | |
488 | } | |
489 | ||
490 | group_size = pim_msg_get_jp_group_size(group->sources); | |
491 | if (group_size > packet_left) { | |
492 | pim_msg_build_header(pim_msg, packet_size, | |
493 | PIM_MSG_TYPE_JOIN_PRUNE); | |
494 | if (pim_msg_send(pim_ifp->pim_sock_fd, | |
495 | pim_ifp->primary_address, | |
496 | qpim_all_pim_routers_addr, pim_msg, | |
497 | packet_size, | |
498 | rpf->source_nexthop.interface->name)) { | |
499 | zlog_warn( | |
500 | "%s: could not send PIM message on interface %s", | |
501 | __PRETTY_FUNCTION__, | |
502 | rpf->source_nexthop.interface->name); | |
503 | } | |
504 | ||
505 | msg = (struct pim_jp *)pim_msg; | |
506 | memset(msg, 0, sizeof(*msg)); | |
507 | ||
508 | pim_msg_addr_encode_ipv4_ucast((uint8_t *)&msg->addr, | |
509 | rpf->rpf_addr.u.prefix4); | |
510 | msg->reserved = 0; | |
511 | msg->holdtime = htons(PIM_JP_HOLDTIME); | |
512 | ||
513 | new_packet = false; | |
514 | ||
515 | grp = &msg->groups[0]; | |
516 | curr_ptr = (uint8_t *)grp; | |
517 | packet_size = sizeof(struct pim_msg_header); | |
518 | packet_size += sizeof(struct pim_encoded_ipv4_unicast); | |
519 | packet_size += | |
520 | 4; // reserved (1) + groups (1) + holdtime (2) | |
521 | ||
522 | packet_left = rpf->source_nexthop.interface->mtu - 24; | |
523 | packet_left -= packet_size; | |
524 | } | |
525 | ||
526 | msg->num_groups++; | |
527 | /* | |
528 | Build PIM message | |
529 | */ | |
530 | ||
531 | curr_ptr += group_size; | |
532 | packet_left -= group_size; | |
533 | packet_size += group_size; | |
534 | pim_msg_build_jp_groups(grp, group, group_size); | |
535 | ||
536 | pim_ifp->pim_ifstat_join_send += ntohs(grp->joins); | |
537 | pim_ifp->pim_ifstat_prune_send += ntohs(grp->prunes); | |
538 | ||
539 | if (PIM_DEBUG_PIM_TRACE) | |
540 | zlog_debug( | |
541 | "%s: interface %s num_joins %u num_prunes %u", | |
542 | __PRETTY_FUNCTION__, | |
543 | rpf->source_nexthop.interface->name, | |
544 | ntohs(grp->joins), ntohs(grp->prunes)); | |
545 | ||
546 | grp = (struct pim_jp_groups *)curr_ptr; | |
547 | if (packet_left < sizeof(struct pim_jp_groups) | |
548 | || msg->num_groups == 255) { | |
549 | pim_msg_build_header(pim_msg, packet_size, | |
550 | PIM_MSG_TYPE_JOIN_PRUNE); | |
551 | if (pim_msg_send(pim_ifp->pim_sock_fd, | |
552 | pim_ifp->primary_address, | |
553 | qpim_all_pim_routers_addr, pim_msg, | |
554 | packet_size, | |
555 | rpf->source_nexthop.interface->name)) { | |
556 | zlog_warn( | |
557 | "%s: could not send PIM message on interface %s", | |
558 | __PRETTY_FUNCTION__, | |
559 | rpf->source_nexthop.interface->name); | |
560 | } | |
561 | ||
562 | new_packet = true; | |
563 | } | |
564 | } | |
565 | ||
566 | ||
567 | if (!new_packet) { | |
568 | // msg->num_groups = htons (msg->num_groups); | |
569 | pim_msg_build_header(pim_msg, packet_size, | |
570 | PIM_MSG_TYPE_JOIN_PRUNE); | |
571 | if (pim_msg_send(pim_ifp->pim_sock_fd, pim_ifp->primary_address, | |
572 | qpim_all_pim_routers_addr, pim_msg, | |
573 | packet_size, | |
574 | rpf->source_nexthop.interface->name)) { | |
575 | zlog_warn( | |
576 | "%s: could not send PIM message on interface %s", | |
577 | __PRETTY_FUNCTION__, | |
578 | rpf->source_nexthop.interface->name); | |
579 | } | |
580 | } | |
581 | return 0; | |
12e41d03 | 582 | } |