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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 | #include "log.h" | |
22 | #include "privs.h" | |
744d91b3 | 23 | #include "if.h" |
065bee4b | 24 | #include "prefix.h" |
dfe43e25 DW |
25 | #include "vty.h" |
26 | #include "plist.h" | |
fe232c19 | 27 | #include "sockopt.h" |
3613d898 | 28 | #include "lib_errors.h" |
12e41d03 DL |
29 | |
30 | #include "pimd.h" | |
8e38a2cf | 31 | #include "pim_rpf.h" |
12e41d03 | 32 | #include "pim_mroute.h" |
37653d4f | 33 | #include "pim_oil.h" |
12e41d03 DL |
34 | #include "pim_str.h" |
35 | #include "pim_time.h" | |
36 | #include "pim_iface.h" | |
37 | #include "pim_macro.h" | |
c8ae3ce8 | 38 | #include "pim_rp.h" |
59471fb8 | 39 | #include "pim_oil.h" |
998af219 | 40 | #include "pim_register.h" |
56638739 | 41 | #include "pim_ifchannel.h" |
e3be0432 | 42 | #include "pim_zlookup.h" |
15a5dafe | 43 | #include "pim_ssm.h" |
2002dcdb | 44 | #include "pim_sock.h" |
37c3fd98 | 45 | #include "pim_vxlan.h" |
12e41d03 | 46 | |
8ea5d944 | 47 | static void mroute_read_on(struct pim_instance *pim); |
12e41d03 | 48 | |
cdbfaec5 | 49 | static int pim_mroute_set(struct pim_instance *pim, int enable) |
12e41d03 | 50 | { |
d62a17ae | 51 | int err; |
e5a2ebe6 DS |
52 | int opt, data; |
53 | socklen_t data_len = sizeof(data); | |
d62a17ae | 54 | long flags; |
55 | ||
cdbfaec5 DS |
56 | /* |
57 | * We need to create the VRF table for the pim mroute_socket | |
58 | */ | |
59 | if (pim->vrf_id != VRF_DEFAULT) { | |
0cf6db21 | 60 | frr_with_privs(&pimd_privs) { |
f507c196 | 61 | |
e5a2ebe6 | 62 | data = pim->vrf->data.l.table_id; |
01b9e3fd DL |
63 | err = setsockopt(pim->mroute_socket, IPPROTO_IP, |
64 | MRT_TABLE, | |
e5a2ebe6 | 65 | &data, data_len); |
01b9e3fd DL |
66 | if (err) { |
67 | zlog_warn( | |
68 | "%s %s: failure: setsockopt(fd=%d,IPPROTO_IP, MRT_TABLE=%d): errno=%d: %s", | |
69 | __FILE__, __PRETTY_FUNCTION__, | |
e5a2ebe6 | 70 | pim->mroute_socket, data, errno, |
01b9e3fd DL |
71 | safe_strerror(errno)); |
72 | return -1; | |
73 | } | |
f507c196 | 74 | |
01b9e3fd | 75 | } |
f507c196 DS |
76 | } |
77 | ||
0cf6db21 | 78 | frr_with_privs(&pimd_privs) { |
f0b009a4 | 79 | opt = enable ? MRT_INIT : MRT_DONE; |
e5a2ebe6 DS |
80 | /* |
81 | * *BSD *cares* about what value we pass down | |
82 | * here | |
83 | */ | |
84 | data = 1; | |
f0b009a4 | 85 | err = setsockopt(pim->mroute_socket, IPPROTO_IP, |
e5a2ebe6 | 86 | opt, &data, data_len); |
f0b009a4 DS |
87 | if (err) { |
88 | zlog_warn( | |
89 | "%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,%s=%d): errno=%d: %s", | |
90 | __FILE__, __PRETTY_FUNCTION__, | |
91 | pim->mroute_socket, | |
e5a2ebe6 | 92 | enable ? "MRT_INIT" : "MRT_DONE", data, errno, |
f0b009a4 DS |
93 | safe_strerror(errno)); |
94 | return -1; | |
95 | } | |
cdbfaec5 DS |
96 | } |
97 | ||
466e4e5b DS |
98 | #if defined(HAVE_IP_PKTINFO) |
99 | if (enable) { | |
100 | /* Linux and Solaris IP_PKTINFO */ | |
e5a2ebe6 DS |
101 | data = 1; |
102 | if (setsockopt(pim->mroute_socket, IPPROTO_IP, IP_PKTINFO, | |
103 | &data, data_len)) { | |
466e4e5b DS |
104 | zlog_warn( |
105 | "Could not set IP_PKTINFO on socket fd=%d: errno=%d: %s", | |
106 | pim->mroute_socket, errno, | |
107 | safe_strerror(errno)); | |
108 | } | |
109 | } | |
110 | #endif | |
111 | ||
cdbfaec5 | 112 | setsockopt_so_recvbuf(pim->mroute_socket, 1024 * 1024 * 8); |
d62a17ae | 113 | |
cdbfaec5 | 114 | flags = fcntl(pim->mroute_socket, F_GETFL, 0); |
d62a17ae | 115 | if (flags < 0) { |
cdbfaec5 DS |
116 | zlog_warn("Could not get flags on socket fd:%d %d %s", |
117 | pim->mroute_socket, errno, safe_strerror(errno)); | |
118 | close(pim->mroute_socket); | |
d62a17ae | 119 | return -1; |
120 | } | |
cdbfaec5 DS |
121 | if (fcntl(pim->mroute_socket, F_SETFL, flags | O_NONBLOCK)) { |
122 | zlog_warn("Could not set O_NONBLOCK on socket fd:%d %d %s", | |
123 | pim->mroute_socket, errno, safe_strerror(errno)); | |
124 | close(pim->mroute_socket); | |
d62a17ae | 125 | return -1; |
126 | } | |
127 | ||
128 | if (enable) { | |
77b7d90b | 129 | #if defined linux |
d62a17ae | 130 | int upcalls = IGMPMSG_WRVIFWHOLE; |
131 | opt = MRT_PIM; | |
132 | ||
cdbfaec5 | 133 | err = setsockopt(pim->mroute_socket, IPPROTO_IP, opt, &upcalls, |
d62a17ae | 134 | sizeof(upcalls)); |
135 | if (err) { | |
136 | zlog_warn( | |
137 | "Failure to register for VIFWHOLE and WRONGVIF upcalls %d %s", | |
138 | errno, safe_strerror(errno)); | |
139 | return -1; | |
140 | } | |
77b7d90b | 141 | #else |
d62a17ae | 142 | zlog_warn( |
143 | "PIM-SM will not work properly on this platform, until the ability to receive the WRVIFWHOLE upcall"); | |
77b7d90b | 144 | #endif |
d62a17ae | 145 | } |
146 | ||
147 | return 0; | |
12e41d03 DL |
148 | } |
149 | ||
2b64873d | 150 | static const char *const igmpmsgtype2str[IGMPMSG_WRVIFWHOLE + 1] = { |
d62a17ae | 151 | "<unknown_upcall?>", "NOCACHE", "WRONGVIF", "WHOLEPKT", "WRVIFWHOLE"}; |
152 | ||
153 | static int pim_mroute_msg_nocache(int fd, struct interface *ifp, | |
154 | const struct igmpmsg *msg) | |
12e41d03 | 155 | { |
d62a17ae | 156 | struct pim_interface *pim_ifp = ifp->info; |
157 | struct pim_upstream *up; | |
158 | struct pim_rpf *rpg; | |
159 | struct prefix_sg sg; | |
160 | ||
b575a12c | 161 | rpg = pim_ifp ? RP(pim_ifp->pim, msg->im_dst) : NULL; |
d62a17ae | 162 | /* |
163 | * If the incoming interface is unknown OR | |
164 | * the Interface type is SSM we don't need to | |
165 | * do anything here | |
166 | */ | |
b5469d02 | 167 | if (!rpg || pim_rpf_addr_is_inaddr_none(rpg)) { |
d62a17ae | 168 | if (PIM_DEBUG_MROUTE_DETAIL) |
169 | zlog_debug( | |
b5469d02 | 170 | "%s: Interface is not configured correctly to handle incoming packet: Could be !pim_ifp, !SM, !RP", |
15569c58 | 171 | __func__); |
b5469d02 | 172 | |
d62a17ae | 173 | return 0; |
174 | } | |
04b40f02 | 175 | |
d62a17ae | 176 | /* |
177 | * If we've received a multicast packet that isn't connected to | |
178 | * us | |
179 | */ | |
180 | if (!pim_if_connected_to_source(ifp, msg->im_src)) { | |
181 | if (PIM_DEBUG_MROUTE_DETAIL) | |
182 | zlog_debug( | |
183 | "%s: Received incoming packet that doesn't originate on our seg", | |
15569c58 | 184 | __func__); |
d62a17ae | 185 | return 0; |
186 | } | |
065bee4b | 187 | |
d62a17ae | 188 | memset(&sg, 0, sizeof(struct prefix_sg)); |
189 | sg.src = msg->im_src; | |
190 | sg.grp = msg->im_dst; | |
191 | ||
b5469d02 | 192 | if (!(PIM_I_am_DR(pim_ifp))) { |
b5469d02 | 193 | if (PIM_DEBUG_MROUTE_DETAIL) |
15569c58 DA |
194 | zlog_debug( |
195 | "%s: Interface is not the DR blackholing incoming traffic for %s", | |
196 | __func__, pim_str_sg_dump(&sg)); | |
b5469d02 DS |
197 | |
198 | /* | |
199 | * We are not the DR, but we are still receiving packets | |
200 | * Let's blackhole those packets for the moment | |
201 | * As that they will be coming up to the cpu | |
202 | * and causing us to consider them. | |
9e132a49 DS |
203 | * |
204 | * This *will* create a dangling channel_oil | |
205 | * that I see no way to get rid of. Just noting | |
206 | * this for future reference. | |
b5469d02 | 207 | */ |
02434c43 | 208 | up = pim_upstream_find_or_add( |
15569c58 DA |
209 | &sg, ifp, PIM_UPSTREAM_FLAG_MASK_SRC_NOCACHE, __func__); |
210 | pim_upstream_mroute_add(up->channel_oil, __func__); | |
b5469d02 DS |
211 | |
212 | return 0; | |
213 | } | |
214 | ||
d62a17ae | 215 | up = pim_upstream_find_or_add(&sg, ifp, PIM_UPSTREAM_FLAG_MASK_FHR, |
15569c58 | 216 | __func__); |
c29a5806 | 217 | |
d62a17ae | 218 | /* |
219 | * I moved this debug till after the actual add because | |
220 | * I want to take advantage of the up->sg_str being filled in. | |
221 | */ | |
222 | if (PIM_DEBUG_MROUTE) { | |
223 | zlog_debug("%s: Adding a Route %s for WHOLEPKT consumption", | |
15569c58 | 224 | __func__, up->sg_str); |
d62a17ae | 225 | } |
8bfb8b67 | 226 | |
d62a17ae | 227 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); |
19b807ca | 228 | pim_upstream_keep_alive_timer_start(up, pim_ifp->pim->keep_alive_time); |
d62a17ae | 229 | |
230 | up->channel_oil->cc.pktcnt++; | |
d62a17ae | 231 | // resolve mfcc_parent prior to mroute_add in channel_add_oif |
957d93ea SP |
232 | if (up->rpf.source_nexthop.interface && |
233 | up->channel_oil->oil.mfcc_parent >= MAXVIFS) { | |
7984af18 | 234 | pim_upstream_mroute_iif_update(up->channel_oil, __func__); |
d62a17ae | 235 | } |
236 | pim_register_join(up); | |
59471fb8 | 237 | |
d62a17ae | 238 | return 0; |
e355e30f | 239 | } |
12e41d03 | 240 | |
d62a17ae | 241 | static int pim_mroute_msg_wholepkt(int fd, struct interface *ifp, |
242 | const char *buf) | |
e355e30f | 243 | { |
d62a17ae | 244 | struct pim_interface *pim_ifp; |
245 | struct prefix_sg sg; | |
246 | struct pim_rpf *rpg; | |
247 | const struct ip *ip_hdr; | |
248 | struct pim_upstream *up; | |
249 | ||
9b29ea95 DS |
250 | pim_ifp = ifp->info; |
251 | ||
d62a17ae | 252 | ip_hdr = (const struct ip *)buf; |
253 | ||
254 | memset(&sg, 0, sizeof(struct prefix_sg)); | |
255 | sg.src = ip_hdr->ip_src; | |
256 | sg.grp = ip_hdr->ip_dst; | |
257 | ||
9b29ea95 | 258 | up = pim_upstream_find(pim_ifp->pim, &sg); |
d62a17ae | 259 | if (!up) { |
260 | struct prefix_sg star = sg; | |
261 | star.src.s_addr = INADDR_ANY; | |
262 | ||
9b29ea95 | 263 | up = pim_upstream_find(pim_ifp->pim, &star); |
d62a17ae | 264 | |
448139e7 | 265 | if (up && PIM_UPSTREAM_FLAG_TEST_CAN_BE_LHR(up->flags)) { |
2002dcdb | 266 | up = pim_upstream_add(pim_ifp->pim, &sg, ifp, |
d62a17ae | 267 | PIM_UPSTREAM_FLAG_MASK_SRC_LHR, |
15569c58 | 268 | __func__, NULL); |
d62a17ae | 269 | if (!up) { |
270 | if (PIM_DEBUG_MROUTE) | |
271 | zlog_debug( | |
272 | "%s: Unable to create upstream information for %s", | |
15569c58 | 273 | __func__, pim_str_sg_dump(&sg)); |
d62a17ae | 274 | return 0; |
275 | } | |
276 | pim_upstream_keep_alive_timer_start( | |
19b807ca | 277 | up, pim_ifp->pim->keep_alive_time); |
9b29ea95 | 278 | pim_upstream_inherited_olist(pim_ifp->pim, up); |
a53a9b3e | 279 | pim_upstream_update_join_desired(pim_ifp->pim, up); |
d62a17ae | 280 | |
281 | if (PIM_DEBUG_MROUTE) | |
282 | zlog_debug("%s: Creating %s upstream on LHR", | |
15569c58 | 283 | __func__, up->sg_str); |
d62a17ae | 284 | return 0; |
285 | } | |
286 | if (PIM_DEBUG_MROUTE_DETAIL) { | |
287 | zlog_debug( | |
288 | "%s: Unable to find upstream channel WHOLEPKT%s", | |
15569c58 | 289 | __func__, pim_str_sg_dump(&sg)); |
d62a17ae | 290 | } |
291 | return 0; | |
292 | } | |
59471fb8 | 293 | |
957d93ea | 294 | if (!up->rpf.source_nexthop.interface) { |
23fc858a | 295 | if (PIM_DEBUG_PIM_TRACE) |
15569c58 DA |
296 | zlog_debug("%s: up %s RPF is not present", __func__, |
297 | up->sg_str); | |
957d93ea SP |
298 | return 0; |
299 | } | |
300 | ||
d62a17ae | 301 | pim_ifp = up->rpf.source_nexthop.interface->info; |
998af219 | 302 | |
b575a12c | 303 | rpg = pim_ifp ? RP(pim_ifp->pim, sg.grp) : NULL; |
c8ae3ce8 | 304 | |
d62a17ae | 305 | if ((pim_rpf_addr_is_inaddr_none(rpg)) || (!pim_ifp) |
306 | || (!(PIM_I_am_DR(pim_ifp)))) { | |
307 | if (PIM_DEBUG_MROUTE) { | |
15569c58 | 308 | zlog_debug("%s: Failed Check send packet", __func__); |
d62a17ae | 309 | } |
310 | return 0; | |
311 | } | |
84366c7e | 312 | |
d62a17ae | 313 | /* |
314 | * If we've received a register suppress | |
315 | */ | |
316 | if (!up->t_rs_timer) { | |
6f439a70 | 317 | if (pim_is_grp_ssm(pim_ifp->pim, sg.grp)) { |
d62a17ae | 318 | if (PIM_DEBUG_PIM_REG) |
319 | zlog_debug( | |
320 | "%s register forward skipped as group is SSM", | |
321 | pim_str_sg_dump(&sg)); | |
322 | return 0; | |
323 | } | |
2bc31c44 AK |
324 | |
325 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) { | |
326 | if (PIM_DEBUG_PIM_REG) | |
327 | zlog_debug( | |
328 | "%s register forward skipped, not FHR", | |
329 | up->sg_str); | |
330 | return 0; | |
331 | } | |
332 | ||
d62a17ae | 333 | pim_register_send((uint8_t *)buf + sizeof(struct ip), |
334 | ntohs(ip_hdr->ip_len) - sizeof(struct ip), | |
335 | pim_ifp->primary_address, rpg, 0, up); | |
336 | } | |
337 | return 0; | |
e355e30f | 338 | } |
12e41d03 | 339 | |
d62a17ae | 340 | static int pim_mroute_msg_wrongvif(int fd, struct interface *ifp, |
341 | const struct igmpmsg *msg) | |
e355e30f | 342 | { |
d62a17ae | 343 | struct pim_ifchannel *ch; |
344 | struct pim_interface *pim_ifp; | |
345 | struct prefix_sg sg; | |
346 | ||
347 | memset(&sg, 0, sizeof(struct prefix_sg)); | |
348 | sg.src = msg->im_src; | |
349 | sg.grp = msg->im_dst; | |
350 | ||
351 | /* | |
352 | Send Assert(S,G) on iif as response to WRONGVIF kernel upcall. | |
353 | ||
354 | RFC 4601 4.8.2. PIM-SSM-Only Routers | |
355 | ||
356 | iif is the incoming interface of the packet. | |
357 | if (iif is in inherited_olist(S,G)) { | |
358 | send Assert(S,G) on iif | |
359 | } | |
360 | */ | |
361 | ||
362 | if (!ifp) { | |
363 | if (PIM_DEBUG_MROUTE) | |
364 | zlog_debug( | |
365 | "%s: WRONGVIF (S,G)=%s could not find input interface for input_vif_index=%d", | |
15569c58 | 366 | __func__, pim_str_sg_dump(&sg), msg->im_vif); |
d62a17ae | 367 | return -1; |
368 | } | |
12e41d03 | 369 | |
d62a17ae | 370 | pim_ifp = ifp->info; |
371 | if (!pim_ifp) { | |
372 | if (PIM_DEBUG_MROUTE) | |
373 | zlog_debug( | |
374 | "%s: WRONGVIF (S,G)=%s multicast not enabled on interface %s", | |
15569c58 | 375 | __func__, pim_str_sg_dump(&sg), ifp->name); |
d62a17ae | 376 | return -2; |
377 | } | |
c29a5806 | 378 | |
d62a17ae | 379 | ch = pim_ifchannel_find(ifp, &sg); |
380 | if (!ch) { | |
381 | struct prefix_sg star_g = sg; | |
382 | if (PIM_DEBUG_MROUTE) | |
383 | zlog_debug( | |
384 | "%s: WRONGVIF (S,G)=%s could not find channel on interface %s", | |
15569c58 | 385 | __func__, pim_str_sg_dump(&sg), ifp->name); |
d62a17ae | 386 | |
387 | star_g.src.s_addr = INADDR_ANY; | |
388 | ch = pim_ifchannel_find(ifp, &star_g); | |
389 | if (!ch) { | |
390 | if (PIM_DEBUG_MROUTE) | |
391 | zlog_debug( | |
392 | "%s: WRONGVIF (*,G)=%s could not find channel on interface %s", | |
15569c58 DA |
393 | __func__, pim_str_sg_dump(&star_g), |
394 | ifp->name); | |
d62a17ae | 395 | return -3; |
396 | } | |
397 | } | |
12e41d03 | 398 | |
d62a17ae | 399 | /* |
400 | RFC 4601: 4.6.1. (S,G) Assert Message State Machine | |
401 | ||
402 | Transitions from NoInfo State | |
403 | ||
404 | An (S,G) data packet arrives on interface I, AND | |
405 | CouldAssert(S,G,I)==TRUE An (S,G) data packet arrived on an | |
406 | downstream interface that is in our (S,G) outgoing interface | |
407 | list. We optimistically assume that we will be the assert | |
408 | winner for this (S,G), and so we transition to the "I am Assert | |
409 | Winner" state and perform Actions A1 (below), which will | |
410 | initiate the assert negotiation for (S,G). | |
411 | */ | |
412 | ||
413 | if (ch->ifassert_state != PIM_IFASSERT_NOINFO) { | |
414 | if (PIM_DEBUG_MROUTE) { | |
415 | zlog_debug( | |
416 | "%s: WRONGVIF (S,G)=%s channel is not on Assert NoInfo state for interface %s", | |
15569c58 | 417 | __func__, ch->sg_str, ifp->name); |
d62a17ae | 418 | } |
419 | return -4; | |
420 | } | |
e355e30f | 421 | |
d62a17ae | 422 | if (!PIM_IF_FLAG_TEST_COULD_ASSERT(ch->flags)) { |
423 | if (PIM_DEBUG_MROUTE) { | |
424 | zlog_debug( | |
425 | "%s: WRONGVIF (S,G)=%s interface %s is not downstream for channel", | |
15569c58 | 426 | __func__, ch->sg_str, ifp->name); |
d62a17ae | 427 | } |
428 | return -5; | |
429 | } | |
430 | ||
431 | if (assert_action_a1(ch)) { | |
432 | if (PIM_DEBUG_MROUTE) { | |
433 | zlog_debug( | |
434 | "%s: WRONGVIF (S,G)=%s assert_action_a1 failure on interface %s", | |
15569c58 | 435 | __func__, ch->sg_str, ifp->name); |
d62a17ae | 436 | } |
437 | return -6; | |
438 | } | |
e355e30f | 439 | |
d62a17ae | 440 | return 0; |
e355e30f DS |
441 | } |
442 | ||
d62a17ae | 443 | static int pim_mroute_msg_wrvifwhole(int fd, struct interface *ifp, |
444 | const char *buf) | |
08e1fe76 | 445 | { |
d62a17ae | 446 | const struct ip *ip_hdr = (const struct ip *)buf; |
447 | struct pim_interface *pim_ifp; | |
448 | struct pim_ifchannel *ch; | |
449 | struct pim_upstream *up; | |
450 | struct prefix_sg star_g; | |
451 | struct prefix_sg sg; | |
d62a17ae | 452 | |
fec883d9 DS |
453 | pim_ifp = ifp->info; |
454 | ||
d62a17ae | 455 | memset(&sg, 0, sizeof(struct prefix_sg)); |
456 | sg.src = ip_hdr->ip_src; | |
457 | sg.grp = ip_hdr->ip_dst; | |
458 | ||
459 | ch = pim_ifchannel_find(ifp, &sg); | |
460 | if (ch) { | |
461 | if (PIM_DEBUG_MROUTE) | |
462 | zlog_debug( | |
463 | "WRVIFWHOLE (S,G)=%s found ifchannel on interface %s", | |
464 | ch->sg_str, ifp->name); | |
465 | return -1; | |
466 | } | |
b7ddd2ec | 467 | |
d62a17ae | 468 | star_g = sg; |
469 | star_g.src.s_addr = INADDR_ANY; | |
b7ddd2ec | 470 | #if 0 |
0490c22d DS |
471 | ch = pim_ifchannel_find(ifp, &star_g); |
472 | if (ch) | |
473 | { | |
474 | if (PIM_DEBUG_MROUTE) | |
475 | zlog_debug ("WRVIFWHOLE (*,G)=%s found ifchannel on interface %s", | |
476 | pim_str_sg_dump (&star_g), ifp->name); | |
477 | return -1; | |
478 | } | |
5cd11e3c | 479 | #endif |
08e1fe76 | 480 | |
9b29ea95 | 481 | up = pim_upstream_find(pim_ifp->pim, &sg); |
d62a17ae | 482 | if (up) { |
483 | struct pim_upstream *parent; | |
484 | struct pim_nexthop source; | |
fec883d9 | 485 | struct pim_rpf *rpf = RP(pim_ifp->pim, sg.grp); |
d62a17ae | 486 | if (!rpf || !rpf->source_nexthop.interface) |
487 | return 0; | |
488 | ||
489 | /* | |
490 | * If we have received a WRVIFWHOLE and are at this | |
491 | * point, we could be receiving the packet on the *,G | |
492 | * tree, let's check and if so we can safely drop | |
493 | * it. | |
494 | */ | |
9b29ea95 | 495 | parent = pim_upstream_find(pim_ifp->pim, &star_g); |
d62a17ae | 496 | if (parent && parent->rpf.source_nexthop.interface == ifp) |
497 | return 0; | |
498 | ||
499 | pim_ifp = rpf->source_nexthop.interface->info; | |
500 | ||
501 | memset(&source, 0, sizeof(source)); | |
502 | /* | |
503 | * If we are the fhr that means we are getting a callback during | |
504 | * the pimreg period, so I believe we can ignore this packet | |
505 | */ | |
506 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) { | |
507 | // No if channel, but upstream we are at the RP. | |
d9c9a9ee | 508 | if (pim_nexthop_lookup(pim_ifp->pim, &source, |
ade155e1 | 509 | up->upstream_register, 0)) { |
d62a17ae | 510 | pim_register_stop_send(source.interface, &sg, |
511 | pim_ifp->primary_address, | |
512 | up->upstream_register); | |
df766618 DS |
513 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
514 | } | |
46dd6edb | 515 | |
9b29ea95 | 516 | pim_upstream_inherited_olist(pim_ifp->pim, up); |
d62a17ae | 517 | if (!up->channel_oil->installed) |
69e3538c | 518 | pim_upstream_mroute_add(up->channel_oil, |
15569c58 | 519 | __func__); |
d62a17ae | 520 | } else { |
d9c9a9ee DS |
521 | if (I_am_RP(pim_ifp->pim, up->sg.grp)) { |
522 | if (pim_nexthop_lookup(pim_ifp->pim, &source, | |
ade155e1 DS |
523 | up->upstream_register, |
524 | 0)) | |
d62a17ae | 525 | pim_register_stop_send( |
526 | source.interface, &sg, | |
527 | pim_ifp->primary_address, | |
528 | up->upstream_register); | |
529 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
530 | } | |
531 | pim_upstream_keep_alive_timer_start( | |
19b807ca | 532 | up, pim_ifp->pim->keep_alive_time); |
9b29ea95 | 533 | pim_upstream_inherited_olist(pim_ifp->pim, up); |
d62a17ae | 534 | pim_mroute_msg_wholepkt(fd, ifp, buf); |
535 | } | |
536 | return 0; | |
537 | } | |
8e38a2cf | 538 | |
d62a17ae | 539 | pim_ifp = ifp->info; |
d62a17ae | 540 | if (pim_if_connected_to_source(ifp, sg.src)) { |
2002dcdb | 541 | up = pim_upstream_add(pim_ifp->pim, &sg, ifp, |
15569c58 DA |
542 | PIM_UPSTREAM_FLAG_MASK_FHR, __func__, |
543 | NULL); | |
d62a17ae | 544 | if (!up) { |
545 | if (PIM_DEBUG_MROUTE) | |
546 | zlog_debug( | |
547 | "%s: WRONGVIF%s unable to create upstream on interface", | |
548 | pim_str_sg_dump(&sg), ifp->name); | |
549 | return -2; | |
550 | } | |
551 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); | |
996c9314 LB |
552 | pim_upstream_keep_alive_timer_start( |
553 | up, pim_ifp->pim->keep_alive_time); | |
d62a17ae | 554 | up->channel_oil->cc.pktcnt++; |
555 | pim_register_join(up); | |
9b29ea95 | 556 | pim_upstream_inherited_olist(pim_ifp->pim, up); |
69e3538c AK |
557 | if (!up->channel_oil->installed) |
558 | pim_upstream_mroute_add(up->channel_oil, __func__); | |
d62a17ae | 559 | |
560 | // Send the packet to the RP | |
561 | pim_mroute_msg_wholepkt(fd, ifp, buf); | |
02434c43 DS |
562 | } else { |
563 | up = pim_upstream_add(pim_ifp->pim, &sg, ifp, | |
564 | PIM_UPSTREAM_FLAG_MASK_SRC_NOCACHE, | |
15569c58 | 565 | __func__, NULL); |
02434c43 | 566 | if (!up->channel_oil->installed) |
15569c58 | 567 | pim_upstream_mroute_add(up->channel_oil, __func__); |
d62a17ae | 568 | } |
08e1fe76 | 569 | |
d62a17ae | 570 | return 0; |
08e1fe76 DS |
571 | } |
572 | ||
405d6357 | 573 | static int pim_mroute_msg(struct pim_instance *pim, const char *buf, |
90450a3d | 574 | int buf_size, ifindex_t ifindex) |
e355e30f | 575 | { |
d62a17ae | 576 | struct interface *ifp; |
577 | struct pim_interface *pim_ifp; | |
578 | const struct ip *ip_hdr; | |
579 | const struct igmpmsg *msg; | |
580 | char ip_src_str[INET_ADDRSTRLEN] = ""; | |
581 | char ip_dst_str[INET_ADDRSTRLEN] = ""; | |
582 | char src_str[INET_ADDRSTRLEN] = "<src?>"; | |
583 | char grp_str[INET_ADDRSTRLEN] = "<grp?>"; | |
584 | struct in_addr ifaddr; | |
585 | struct igmp_sock *igmp; | |
586 | ||
f08e6750 QY |
587 | if (buf_size < (int)sizeof(struct ip)) |
588 | return 0; | |
589 | ||
d62a17ae | 590 | ip_hdr = (const struct ip *)buf; |
591 | ||
592 | if (ip_hdr->ip_p == IPPROTO_IGMP) { | |
593 | ||
594 | /* We have the IP packet but we do not know which interface this | |
595 | * packet was | |
596 | * received on. Find the interface that is on the same subnet as | |
597 | * the source | |
598 | * of the IP packet. | |
599 | */ | |
90450a3d | 600 | ifp = if_lookup_by_index(ifindex, pim->vrf_id); |
d62a17ae | 601 | |
1ef8c24e | 602 | if (!ifp || !ifp->info) |
d62a17ae | 603 | return 0; |
90450a3d | 604 | |
d62a17ae | 605 | pim_ifp = ifp->info; |
606 | ifaddr = pim_find_primary_addr(ifp); | |
607 | igmp = pim_igmp_sock_lookup_ifaddr(pim_ifp->igmp_socket_list, | |
608 | ifaddr); | |
609 | ||
610 | if (PIM_DEBUG_MROUTE) { | |
611 | pim_inet4_dump("<src?>", ip_hdr->ip_src, ip_src_str, | |
612 | sizeof(ip_src_str)); | |
613 | pim_inet4_dump("<dst?>", ip_hdr->ip_dst, ip_dst_str, | |
614 | sizeof(ip_dst_str)); | |
615 | ||
fb9670aa | 616 | zlog_debug( |
7c2bfc2a | 617 | "%s(%s): igmp kernel upcall on %s(%p) for %s -> %s", |
15569c58 DA |
618 | __func__, pim->vrf->name, ifp->name, igmp, |
619 | ip_src_str, ip_dst_str); | |
d62a17ae | 620 | } |
621 | if (igmp) | |
622 | pim_igmp_packet(igmp, (char *)buf, buf_size); | |
623 | ||
624 | } else if (ip_hdr->ip_p) { | |
625 | if (PIM_DEBUG_MROUTE_DETAIL) { | |
626 | pim_inet4_dump("<src?>", ip_hdr->ip_src, src_str, | |
627 | sizeof(src_str)); | |
628 | pim_inet4_dump("<grp?>", ip_hdr->ip_dst, grp_str, | |
629 | sizeof(grp_str)); | |
630 | zlog_debug( | |
631 | "%s: no kernel upcall proto=%d src: %s dst: %s msg_size=%d", | |
15569c58 DA |
632 | __func__, ip_hdr->ip_p, src_str, grp_str, |
633 | buf_size); | |
d62a17ae | 634 | } |
635 | ||
636 | } else { | |
637 | msg = (const struct igmpmsg *)buf; | |
638 | ||
7cfc7bcf | 639 | ifp = pim_if_find_by_vif_index(pim, msg->im_vif); |
d62a17ae | 640 | |
641 | if (!ifp) | |
642 | return 0; | |
643 | if (PIM_DEBUG_MROUTE) { | |
644 | pim_inet4_dump("<src?>", msg->im_src, src_str, | |
645 | sizeof(src_str)); | |
646 | pim_inet4_dump("<grp?>", msg->im_dst, grp_str, | |
647 | sizeof(grp_str)); | |
fb9670aa | 648 | zlog_debug( |
d62a17ae | 649 | "%s: pim kernel upcall %s type=%d ip_p=%d from fd=%d for (S,G)=(%s,%s) on %s vifi=%d size=%d", |
15569c58 | 650 | __func__, igmpmsgtype2str[msg->im_msgtype], |
405d6357 DS |
651 | msg->im_msgtype, ip_hdr->ip_p, |
652 | pim->mroute_socket, src_str, grp_str, ifp->name, | |
653 | msg->im_vif, buf_size); | |
d62a17ae | 654 | } |
655 | ||
656 | switch (msg->im_msgtype) { | |
657 | case IGMPMSG_WRONGVIF: | |
405d6357 DS |
658 | return pim_mroute_msg_wrongvif(pim->mroute_socket, ifp, |
659 | msg); | |
d62a17ae | 660 | break; |
661 | case IGMPMSG_NOCACHE: | |
405d6357 DS |
662 | return pim_mroute_msg_nocache(pim->mroute_socket, ifp, |
663 | msg); | |
d62a17ae | 664 | break; |
665 | case IGMPMSG_WHOLEPKT: | |
405d6357 | 666 | return pim_mroute_msg_wholepkt(pim->mroute_socket, ifp, |
d62a17ae | 667 | (const char *)msg); |
668 | break; | |
669 | case IGMPMSG_WRVIFWHOLE: | |
405d6357 DS |
670 | return pim_mroute_msg_wrvifwhole( |
671 | pim->mroute_socket, ifp, (const char *)msg); | |
d62a17ae | 672 | break; |
673 | default: | |
674 | break; | |
675 | } | |
676 | } | |
12e41d03 | 677 | |
d62a17ae | 678 | return 0; |
12e41d03 DL |
679 | } |
680 | ||
12e41d03 DL |
681 | static int mroute_read(struct thread *t) |
682 | { | |
8ea5d944 | 683 | struct pim_instance *pim; |
d62a17ae | 684 | static long long count; |
685 | char buf[10000]; | |
686 | int result = 0; | |
687 | int cont = 1; | |
d62a17ae | 688 | int rd; |
90450a3d | 689 | ifindex_t ifindex; |
8ea5d944 | 690 | pim = THREAD_ARG(t); |
d62a17ae | 691 | |
692 | while (cont) { | |
90450a3d DS |
693 | rd = pim_socket_recvfromto(pim->mroute_socket, (uint8_t *)buf, |
694 | sizeof(buf), NULL, NULL, NULL, NULL, | |
695 | &ifindex); | |
61e99c94 | 696 | if (rd <= 0) { |
d62a17ae | 697 | if (errno == EINTR) |
698 | continue; | |
699 | if (errno == EWOULDBLOCK || errno == EAGAIN) | |
700 | break; | |
701 | ||
15569c58 DA |
702 | zlog_warn( |
703 | "%s: failure reading rd=%d: fd=%d: errno=%d: %s", | |
704 | __func__, rd, pim->mroute_socket, errno, | |
705 | safe_strerror(errno)); | |
d62a17ae | 706 | goto done; |
707 | } | |
708 | ||
90450a3d | 709 | result = pim_mroute_msg(pim, buf, rd, ifindex); |
d62a17ae | 710 | |
711 | count++; | |
75373cca | 712 | if (count % router->packet_process == 0) |
d62a17ae | 713 | cont = 0; |
714 | } | |
715 | /* Keep reading */ | |
716 | done: | |
8ea5d944 | 717 | mroute_read_on(pim); |
12e41d03 | 718 | |
d62a17ae | 719 | return result; |
12e41d03 DL |
720 | } |
721 | ||
8ea5d944 | 722 | static void mroute_read_on(struct pim_instance *pim) |
12e41d03 | 723 | { |
36417fcc | 724 | thread_add_read(router->master, mroute_read, pim, pim->mroute_socket, |
8ea5d944 | 725 | &pim->thread); |
12e41d03 DL |
726 | } |
727 | ||
8ea5d944 | 728 | static void mroute_read_off(struct pim_instance *pim) |
12e41d03 | 729 | { |
8ea5d944 | 730 | THREAD_OFF(pim->thread); |
12e41d03 DL |
731 | } |
732 | ||
6beed987 | 733 | int pim_mroute_socket_enable(struct pim_instance *pim) |
12e41d03 | 734 | { |
d62a17ae | 735 | int fd; |
12e41d03 | 736 | |
0cf6db21 | 737 | frr_with_privs(&pimd_privs) { |
12e41d03 | 738 | |
01b9e3fd | 739 | fd = socket(AF_INET, SOCK_RAW, IPPROTO_IGMP); |
12e41d03 | 740 | |
01b9e3fd DL |
741 | if (fd < 0) { |
742 | zlog_warn("Could not create mroute socket: errno=%d: %s", | |
743 | errno, | |
744 | safe_strerror(errno)); | |
745 | return -2; | |
746 | } | |
e691f179 | 747 | |
466e4e5b | 748 | #ifdef SO_BINDTODEVICE |
01b9e3fd | 749 | if (pim->vrf->vrf_id != VRF_DEFAULT |
633fc9b1 DL |
750 | && setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, |
751 | pim->vrf->name, strlen(pim->vrf->name))) { | |
01b9e3fd DL |
752 | zlog_warn("Could not setsockopt SO_BINDTODEVICE: %s", |
753 | safe_strerror(errno)); | |
754 | close(fd); | |
755 | return -3; | |
756 | } | |
466e4e5b | 757 | #endif |
90450a3d | 758 | |
01b9e3fd | 759 | } |
12e41d03 | 760 | |
cdbfaec5 DS |
761 | pim->mroute_socket = fd; |
762 | if (pim_mroute_set(pim, 1)) { | |
d62a17ae | 763 | zlog_warn( |
764 | "Could not enable mroute on socket fd=%d: errno=%d: %s", | |
765 | fd, errno, safe_strerror(errno)); | |
766 | close(fd); | |
cdbfaec5 | 767 | pim->mroute_socket = -1; |
d62a17ae | 768 | return -3; |
769 | } | |
12e41d03 | 770 | |
6beed987 | 771 | pim->mroute_socket_creation = pim_time_monotonic_sec(); |
b45cefcb | 772 | |
8ea5d944 | 773 | mroute_read_on(pim); |
12e41d03 | 774 | |
d62a17ae | 775 | return 0; |
12e41d03 DL |
776 | } |
777 | ||
6beed987 | 778 | int pim_mroute_socket_disable(struct pim_instance *pim) |
12e41d03 | 779 | { |
cdbfaec5 | 780 | if (pim_mroute_set(pim, 0)) { |
d62a17ae | 781 | zlog_warn( |
782 | "Could not disable mroute on socket fd=%d: errno=%d: %s", | |
405d6357 | 783 | pim->mroute_socket, errno, safe_strerror(errno)); |
d62a17ae | 784 | return -2; |
785 | } | |
786 | ||
6beed987 | 787 | if (close(pim->mroute_socket)) { |
d62a17ae | 788 | zlog_warn("Failure closing mroute socket: fd=%d errno=%d: %s", |
405d6357 | 789 | pim->mroute_socket, errno, safe_strerror(errno)); |
d62a17ae | 790 | return -3; |
791 | } | |
792 | ||
8ea5d944 | 793 | mroute_read_off(pim); |
6beed987 | 794 | pim->mroute_socket = -1; |
d62a17ae | 795 | |
796 | return 0; | |
12e41d03 DL |
797 | } |
798 | ||
799 | /* | |
800 | For each network interface (e.g., physical or a virtual tunnel) that | |
801 | would be used for multicast forwarding, a corresponding multicast | |
802 | interface must be added to the kernel. | |
803 | */ | |
d62a17ae | 804 | int pim_mroute_add_vif(struct interface *ifp, struct in_addr ifaddr, |
805 | unsigned char flags) | |
12e41d03 | 806 | { |
d62a17ae | 807 | struct pim_interface *pim_ifp = ifp->info; |
808 | struct vifctl vc; | |
809 | int err; | |
12e41d03 | 810 | |
08f4f901 | 811 | if (PIM_DEBUG_MROUTE) |
15569c58 | 812 | zlog_debug("%s: Add Vif %d (%s[%s])", __func__, |
996c9314 LB |
813 | pim_ifp->mroute_vif_index, ifp->name, |
814 | pim_ifp->pim->vrf->name); | |
08f4f901 | 815 | |
d62a17ae | 816 | memset(&vc, 0, sizeof(vc)); |
817 | vc.vifc_vifi = pim_ifp->mroute_vif_index; | |
b3f2bf7c | 818 | #ifdef VIFF_USE_IFINDEX |
d62a17ae | 819 | vc.vifc_lcl_ifindex = ifp->ifindex; |
b3f2bf7c | 820 | #else |
d62a17ae | 821 | if (ifaddr.s_addr == INADDR_ANY) { |
822 | zlog_warn( | |
823 | "%s: unnumbered interfaces are not supported on this platform", | |
15569c58 | 824 | __func__); |
d62a17ae | 825 | return -1; |
826 | } | |
827 | memcpy(&vc.vifc_lcl_addr, &ifaddr, sizeof(vc.vifc_lcl_addr)); | |
b3f2bf7c | 828 | #endif |
d62a17ae | 829 | vc.vifc_flags = flags; |
830 | vc.vifc_threshold = PIM_MROUTE_MIN_TTL; | |
831 | vc.vifc_rate_limit = 0; | |
832 | ||
833 | #ifdef PIM_DVMRP_TUNNEL | |
834 | if (vc.vifc_flags & VIFF_TUNNEL) { | |
835 | memcpy(&vc.vifc_rmt_addr, &vif_remote_addr, | |
836 | sizeof(vc.vifc_rmt_addr)); | |
837 | } | |
12e41d03 DL |
838 | #endif |
839 | ||
ea3d967b | 840 | err = setsockopt(pim_ifp->pim->mroute_socket, IPPROTO_IP, MRT_ADD_VIF, |
d62a17ae | 841 | (void *)&vc, sizeof(vc)); |
842 | if (err) { | |
843 | char ifaddr_str[INET_ADDRSTRLEN]; | |
12e41d03 | 844 | |
d62a17ae | 845 | pim_inet4_dump("<ifaddr?>", ifaddr, ifaddr_str, |
846 | sizeof(ifaddr_str)); | |
12e41d03 | 847 | |
d62a17ae | 848 | zlog_warn( |
08f4f901 | 849 | "%s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_ADD_VIF,vif_index=%d,ifaddr=%s,flag=%d): errno=%d: %s", |
15569c58 DA |
850 | __func__, pim_ifp->pim->mroute_socket, ifp->ifindex, |
851 | ifaddr_str, flags, errno, safe_strerror(errno)); | |
d62a17ae | 852 | return -2; |
853 | } | |
12e41d03 | 854 | |
d62a17ae | 855 | return 0; |
12e41d03 DL |
856 | } |
857 | ||
ea3d967b | 858 | int pim_mroute_del_vif(struct interface *ifp) |
12e41d03 | 859 | { |
ea3d967b | 860 | struct pim_interface *pim_ifp = ifp->info; |
d62a17ae | 861 | struct vifctl vc; |
862 | int err; | |
863 | ||
ea3d967b | 864 | if (PIM_DEBUG_MROUTE) |
15569c58 | 865 | zlog_debug("%s: Del Vif %d (%s[%s])", __func__, |
996c9314 LB |
866 | pim_ifp->mroute_vif_index, ifp->name, |
867 | pim_ifp->pim->vrf->name); | |
12e41d03 | 868 | |
d62a17ae | 869 | memset(&vc, 0, sizeof(vc)); |
ea3d967b | 870 | vc.vifc_vifi = pim_ifp->mroute_vif_index; |
d62a17ae | 871 | |
ea3d967b | 872 | err = setsockopt(pim_ifp->pim->mroute_socket, IPPROTO_IP, MRT_DEL_VIF, |
d62a17ae | 873 | (void *)&vc, sizeof(vc)); |
874 | if (err) { | |
875 | zlog_warn( | |
876 | "%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_DEL_VIF,vif_index=%d): errno=%d: %s", | |
15569c58 DA |
877 | __FILE__, __func__, pim_ifp->pim->mroute_socket, |
878 | pim_ifp->mroute_vif_index, errno, safe_strerror(errno)); | |
d62a17ae | 879 | return -2; |
880 | } | |
12e41d03 | 881 | |
d62a17ae | 882 | return 0; |
12e41d03 DL |
883 | } |
884 | ||
60eb7e6b AK |
885 | /* |
886 | * Prevent creating MFC entry with OIF=IIF. | |
887 | * | |
888 | * This is a protection against implementation mistakes. | |
889 | * | |
890 | * PIM protocol implicitely ensures loopfree multicast topology. | |
891 | * | |
892 | * IGMP must be protected against adding looped MFC entries created | |
893 | * by both source and receiver attached to the same interface. See | |
894 | * TODO T22. | |
895 | * We shall allow igmp to create upstream when it is DR for the intf. | |
896 | * Assume RP reachable via non DR. | |
897 | */ | |
898 | bool pim_mroute_allow_iif_in_oil(struct channel_oil *c_oil, | |
899 | int oif_index) | |
900 | { | |
901 | #ifdef PIM_ENFORCE_LOOPFREE_MFC | |
902 | struct interface *ifp_out; | |
903 | struct pim_interface *pim_ifp; | |
904 | ||
905 | if (c_oil->up && | |
906 | PIM_UPSTREAM_FLAG_TEST_ALLOW_IIF_IN_OIL(c_oil->up->flags)) | |
907 | return true; | |
908 | ||
909 | ifp_out = pim_if_find_by_vif_index(c_oil->pim, oif_index); | |
910 | if (!ifp_out) | |
911 | return false; | |
912 | pim_ifp = ifp_out->info; | |
913 | if (!pim_ifp) | |
914 | return false; | |
915 | if ((c_oil->oif_flags[oif_index] & PIM_OIF_FLAG_PROTO_IGMP) && | |
916 | PIM_I_am_DR(pim_ifp)) | |
917 | return true; | |
918 | ||
919 | return false; | |
920 | #else | |
921 | return true; | |
922 | #endif | |
923 | } | |
924 | ||
5a5f404e AK |
925 | static inline void pim_mroute_copy(struct mfcctl *oil, |
926 | struct channel_oil *c_oil) | |
927 | { | |
928 | int i; | |
929 | ||
930 | oil->mfcc_origin = c_oil->oil.mfcc_origin; | |
931 | oil->mfcc_mcastgrp = c_oil->oil.mfcc_mcastgrp; | |
932 | oil->mfcc_parent = c_oil->oil.mfcc_parent; | |
933 | ||
934 | for (i = 0; i < MAXVIFS; ++i) { | |
60eb7e6b AK |
935 | if ((oil->mfcc_parent == i) && |
936 | !pim_mroute_allow_iif_in_oil(c_oil, i)) { | |
937 | oil->mfcc_ttls[i] = 0; | |
938 | continue; | |
939 | } | |
940 | ||
5a5f404e AK |
941 | if (c_oil->oif_flags[i] & PIM_OIF_FLAG_MUTE) |
942 | oil->mfcc_ttls[i] = 0; | |
943 | else | |
944 | oil->mfcc_ttls[i] = c_oil->oil.mfcc_ttls[i]; | |
945 | } | |
946 | } | |
947 | ||
69e3538c AK |
948 | /* This function must not be called directly 0 |
949 | * use pim_upstream_mroute_add or pim_static_mroute_add instead | |
950 | */ | |
951 | static int pim_mroute_add(struct channel_oil *c_oil, const char *name) | |
12e41d03 | 952 | { |
9a0f71c9 | 953 | struct pim_instance *pim = c_oil->pim; |
5a5f404e | 954 | struct mfcctl tmp_oil; |
d62a17ae | 955 | int err; |
d62a17ae | 956 | |
856e863f DS |
957 | pim->mroute_add_last = pim_time_monotonic_sec(); |
958 | ++pim->mroute_add_events; | |
d62a17ae | 959 | |
5a5f404e AK |
960 | /* Copy the oil to a temporary structure to fixup (without need to |
961 | * later restore) before sending the mroute add to the dataplane | |
962 | */ | |
963 | pim_mroute_copy(&tmp_oil, c_oil); | |
d3aded99 | 964 | |
d62a17ae | 965 | /* The linux kernel *expects* the incoming |
966 | * vif to be part of the outgoing list | |
967 | * in the case of a (*,G). | |
968 | */ | |
969 | if (c_oil->oil.mfcc_origin.s_addr == INADDR_ANY) { | |
5a5f404e | 970 | tmp_oil.mfcc_ttls[c_oil->oil.mfcc_parent] = 1; |
76e4825a AK |
971 | } |
972 | ||
d62a17ae | 973 | /* |
974 | * If we have an unresolved cache entry for the S,G | |
975 | * it is owned by the pimreg for the incoming IIF | |
976 | * So set pimreg as the IIF temporarily to cause | |
977 | * the packets to be forwarded. Then set it | |
978 | * to the correct IIF afterwords. | |
979 | */ | |
980 | if (!c_oil->installed && c_oil->oil.mfcc_origin.s_addr != INADDR_ANY | |
981 | && c_oil->oil.mfcc_parent != 0) { | |
5a5f404e | 982 | tmp_oil.mfcc_parent = 0; |
d62a17ae | 983 | } |
856e863f | 984 | err = setsockopt(pim->mroute_socket, IPPROTO_IP, MRT_ADD_MFC, |
5a5f404e | 985 | &tmp_oil, sizeof(tmp_oil)); |
d62a17ae | 986 | |
987 | if (!err && !c_oil->installed | |
988 | && c_oil->oil.mfcc_origin.s_addr != INADDR_ANY | |
5a5f404e AK |
989 | && c_oil->oil.mfcc_parent != 0) { |
990 | tmp_oil.mfcc_parent = c_oil->oil.mfcc_parent; | |
856e863f | 991 | err = setsockopt(pim->mroute_socket, IPPROTO_IP, MRT_ADD_MFC, |
5a5f404e | 992 | &tmp_oil, sizeof(tmp_oil)); |
42e01756 | 993 | } |
37c3fd98 | 994 | |
d62a17ae | 995 | if (err) { |
996 | zlog_warn( | |
997 | "%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_ADD_MFC): errno=%d: %s", | |
15569c58 DA |
998 | __FILE__, __func__, pim->mroute_socket, errno, |
999 | safe_strerror(errno)); | |
d62a17ae | 1000 | return -2; |
1001 | } | |
12e41d03 | 1002 | |
d62a17ae | 1003 | if (PIM_DEBUG_MROUTE) { |
1004 | char buf[1000]; | |
15569c58 DA |
1005 | zlog_debug("%s(%s), vrf %s Added Route: %s", __func__, name, |
1006 | pim->vrf->name, | |
d62a17ae | 1007 | pim_channel_oil_dump(c_oil, buf, sizeof(buf))); |
1008 | } | |
6a78764e | 1009 | |
d62a17ae | 1010 | c_oil->installed = 1; |
e7cd85bd SP |
1011 | c_oil->mroute_creation = pim_time_monotonic_sec(); |
1012 | ||
d62a17ae | 1013 | return 0; |
12e41d03 DL |
1014 | } |
1015 | ||
7984af18 AK |
1016 | static int pim_upstream_get_mroute_iif(struct channel_oil *c_oil, |
1017 | const char *name) | |
69e3538c AK |
1018 | { |
1019 | vifi_t iif = MAXVIFS; | |
69e3538c AK |
1020 | struct interface *ifp = NULL; |
1021 | struct pim_interface *pim_ifp; | |
1022 | struct pim_upstream *up = c_oil->up; | |
1023 | ||
1024 | if (up) { | |
1025 | if (PIM_UPSTREAM_FLAG_TEST_USE_RPT(up->flags)) { | |
1026 | if (up->parent) | |
1027 | ifp = up->parent->rpf.source_nexthop.interface; | |
1028 | } else { | |
1029 | ifp = up->rpf.source_nexthop.interface; | |
1030 | } | |
1031 | if (ifp) { | |
1032 | pim_ifp = (struct pim_interface *)ifp->info; | |
1033 | if (pim_ifp) | |
1034 | iif = pim_ifp->mroute_vif_index; | |
1035 | } | |
1036 | } | |
7984af18 AK |
1037 | return iif; |
1038 | } | |
69e3538c | 1039 | |
7984af18 AK |
1040 | static int pim_upstream_mroute_update(struct channel_oil *c_oil, |
1041 | const char *name) | |
1042 | { | |
1043 | char buf[1000]; | |
69e3538c AK |
1044 | |
1045 | if (c_oil->oil.mfcc_parent >= MAXVIFS) { | |
1046 | /* the c_oil cannot be installed as a mroute yet */ | |
1047 | if (PIM_DEBUG_MROUTE) | |
1048 | zlog_debug( | |
1049 | "%s(%s) %s mroute not ready to be installed; %s", | |
7984af18 | 1050 | __func__, name, |
69e3538c AK |
1051 | pim_channel_oil_dump(c_oil, buf, |
1052 | sizeof(buf)), | |
1053 | c_oil->installed ? | |
1054 | "uninstall" : "skip"); | |
1055 | /* if already installed flush it out as we are going to stop | |
1056 | * updates to it leaving it in a stale state | |
1057 | */ | |
1058 | if (c_oil->installed) | |
1059 | pim_mroute_del(c_oil, name); | |
1060 | /* return success (skipped) */ | |
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | return pim_mroute_add(c_oil, name); | |
1065 | } | |
1066 | ||
70c86421 AK |
1067 | /* IIF associated with SGrpt entries are re-evaluated when the parent |
1068 | * (*,G) entries IIF changes | |
1069 | */ | |
1070 | static void pim_upstream_all_sources_iif_update(struct pim_upstream *up) | |
1071 | { | |
1072 | struct listnode *listnode; | |
1073 | struct pim_upstream *child; | |
1074 | ||
1075 | for (ALL_LIST_ELEMENTS_RO(up->sources, listnode, | |
1076 | child)) { | |
1077 | if (PIM_UPSTREAM_FLAG_TEST_USE_RPT(child->flags)) | |
1078 | pim_upstream_mroute_iif_update(child->channel_oil, | |
1079 | __func__); | |
1080 | } | |
1081 | } | |
1082 | ||
7984af18 AK |
1083 | /* In the case of "PIM state machine" added mroutes an upstream entry |
1084 | * must be present to decide on the SPT-forwarding vs. RPT-forwarding. | |
1085 | */ | |
1086 | int pim_upstream_mroute_add(struct channel_oil *c_oil, const char *name) | |
1087 | { | |
70c86421 AK |
1088 | vifi_t iif; |
1089 | ||
1090 | iif = pim_upstream_get_mroute_iif(c_oil, name); | |
1091 | ||
1092 | if (c_oil->oil.mfcc_parent != iif) { | |
1093 | c_oil->oil.mfcc_parent = iif; | |
1094 | if (c_oil->oil.mfcc_origin.s_addr == INADDR_ANY && | |
1095 | c_oil->up) | |
1096 | pim_upstream_all_sources_iif_update(c_oil->up); | |
1097 | } else { | |
1098 | c_oil->oil.mfcc_parent = iif; | |
1099 | } | |
7984af18 AK |
1100 | |
1101 | return pim_upstream_mroute_update(c_oil, name); | |
1102 | } | |
1103 | ||
1104 | /* Look for IIF changes and update the dateplane entry only if the IIF | |
1105 | * has changed. | |
1106 | */ | |
1107 | int pim_upstream_mroute_iif_update(struct channel_oil *c_oil, const char *name) | |
1108 | { | |
1109 | vifi_t iif; | |
1110 | char buf[1000]; | |
1111 | ||
1112 | iif = pim_upstream_get_mroute_iif(c_oil, name); | |
1113 | if (c_oil->oil.mfcc_parent == iif) { | |
1114 | /* no change */ | |
1115 | return 0; | |
1116 | } | |
1117 | c_oil->oil.mfcc_parent = iif; | |
1118 | ||
70c86421 AK |
1119 | if (c_oil->oil.mfcc_origin.s_addr == INADDR_ANY && |
1120 | c_oil->up) | |
1121 | pim_upstream_all_sources_iif_update(c_oil->up); | |
1122 | ||
7984af18 AK |
1123 | if (PIM_DEBUG_MROUTE_DETAIL) |
1124 | zlog_debug("%s(%s) %s mroute iif update %d", | |
1125 | __func__, name, | |
1126 | pim_channel_oil_dump(c_oil, buf, | |
1127 | sizeof(buf)), iif); | |
1128 | /* XXX: is this hack needed? */ | |
1129 | c_oil->oil_inherited_rescan = 1; | |
1130 | return pim_upstream_mroute_update(c_oil, name); | |
1131 | } | |
1132 | ||
69e3538c AK |
1133 | int pim_static_mroute_add(struct channel_oil *c_oil, const char *name) |
1134 | { | |
1135 | return pim_mroute_add(c_oil, name); | |
1136 | } | |
1137 | ||
7984af18 AK |
1138 | void pim_static_mroute_iif_update(struct channel_oil *c_oil, |
1139 | int input_vif_index, | |
1140 | const char *name) | |
1141 | { | |
1142 | if (c_oil->oil.mfcc_parent == input_vif_index) | |
1143 | return; | |
1144 | ||
1145 | c_oil->oil.mfcc_parent = input_vif_index; | |
1146 | if (input_vif_index == MAXVIFS) | |
1147 | pim_mroute_del(c_oil, name); | |
1148 | else | |
1149 | pim_static_mroute_add(c_oil, name); | |
1150 | } | |
1151 | ||
d62a17ae | 1152 | int pim_mroute_del(struct channel_oil *c_oil, const char *name) |
12e41d03 | 1153 | { |
9a0f71c9 | 1154 | struct pim_instance *pim = c_oil->pim; |
d62a17ae | 1155 | int err; |
1156 | ||
856e863f DS |
1157 | pim->mroute_del_last = pim_time_monotonic_sec(); |
1158 | ++pim->mroute_del_events; | |
d62a17ae | 1159 | |
1160 | if (!c_oil->installed) { | |
1161 | if (PIM_DEBUG_MROUTE) { | |
1162 | char buf[1000]; | |
1163 | zlog_debug( | |
1164 | "%s %s: vifi %d for route is %s not installed, do not need to send del req. ", | |
15569c58 | 1165 | __FILE__, __func__, c_oil->oil.mfcc_parent, |
d62a17ae | 1166 | pim_channel_oil_dump(c_oil, buf, sizeof(buf))); |
1167 | } | |
1168 | return -2; | |
1169 | } | |
12e41d03 | 1170 | |
856e863f | 1171 | err = setsockopt(pim->mroute_socket, IPPROTO_IP, MRT_DEL_MFC, |
d62a17ae | 1172 | &c_oil->oil, sizeof(c_oil->oil)); |
1173 | if (err) { | |
1174 | if (PIM_DEBUG_MROUTE) | |
1175 | zlog_warn( | |
1176 | "%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_DEL_MFC): errno=%d: %s", | |
15569c58 | 1177 | __FILE__, __func__, pim->mroute_socket, errno, |
d62a17ae | 1178 | safe_strerror(errno)); |
1179 | return -2; | |
1180 | } | |
429a291b | 1181 | |
d62a17ae | 1182 | if (PIM_DEBUG_MROUTE) { |
1183 | char buf[1000]; | |
15569c58 DA |
1184 | zlog_debug("%s(%s), vrf %s Deleted Route: %s", __func__, name, |
1185 | pim->vrf->name, | |
d62fd596 | 1186 | pim_channel_oil_dump(c_oil, buf, sizeof(buf))); |
d62a17ae | 1187 | } |
781a1745 | 1188 | |
d62a17ae | 1189 | // Reset kernel installed flag |
1190 | c_oil->installed = 0; | |
58302dc7 | 1191 | |
d62a17ae | 1192 | return 0; |
12e41d03 | 1193 | } |
3667e8a0 | 1194 | |
d62a17ae | 1195 | void pim_mroute_update_counters(struct channel_oil *c_oil) |
3667e8a0 | 1196 | { |
9a0f71c9 | 1197 | struct pim_instance *pim = c_oil->pim; |
d62a17ae | 1198 | struct sioc_sg_req sgreq; |
1199 | ||
1200 | c_oil->cc.oldpktcnt = c_oil->cc.pktcnt; | |
1201 | c_oil->cc.oldbytecnt = c_oil->cc.bytecnt; | |
1202 | c_oil->cc.oldwrong_if = c_oil->cc.wrong_if; | |
1203 | ||
1204 | if (!c_oil->installed) { | |
19b807ca | 1205 | c_oil->cc.lastused = 100 * pim->keep_alive_time; |
d62a17ae | 1206 | if (PIM_DEBUG_MROUTE) { |
1207 | struct prefix_sg sg; | |
1208 | ||
1209 | sg.src = c_oil->oil.mfcc_origin; | |
1210 | sg.grp = c_oil->oil.mfcc_mcastgrp; | |
1211 | if (PIM_DEBUG_MROUTE) | |
1212 | zlog_debug( | |
41714081 | 1213 | "Channel%s is not installed no need to collect data from kernel", |
d62a17ae | 1214 | pim_str_sg_dump(&sg)); |
1215 | } | |
1216 | return; | |
c7b1183f | 1217 | } |
c7b1183f | 1218 | |
d62a17ae | 1219 | memset(&sgreq, 0, sizeof(sgreq)); |
1220 | sgreq.src = c_oil->oil.mfcc_origin; | |
1221 | sgreq.grp = c_oil->oil.mfcc_mcastgrp; | |
1222 | ||
1223 | pim_zlookup_sg_statistics(c_oil); | |
856e863f | 1224 | if (ioctl(pim->mroute_socket, SIOCGETSGCNT, &sgreq)) { |
fb9670aa | 1225 | struct prefix_sg sg; |
d62a17ae | 1226 | |
fb9670aa DS |
1227 | sg.src = c_oil->oil.mfcc_origin; |
1228 | sg.grp = c_oil->oil.mfcc_mcastgrp; | |
d62a17ae | 1229 | |
fb9670aa DS |
1230 | zlog_warn("ioctl(SIOCGETSGCNT=%lu) failure for (S,G)=%s: errno=%d: %s", |
1231 | (unsigned long)SIOCGETSGCNT, pim_str_sg_dump(&sg), | |
1232 | errno, safe_strerror(errno)); | |
d62a17ae | 1233 | return; |
c7b1183f | 1234 | } |
3667e8a0 | 1235 | |
d62a17ae | 1236 | c_oil->cc.pktcnt = sgreq.pktcnt; |
1237 | c_oil->cc.bytecnt = sgreq.bytecnt; | |
1238 | c_oil->cc.wrong_if = sgreq.wrong_if; | |
3667e8a0 | 1239 | |
d62a17ae | 1240 | return; |
3667e8a0 | 1241 | } |