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12e41d03 DL |
1 | /* |
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 | |
16 | along with this program; see the file COPYING; if not, write to the | |
17 | Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, | |
18 | MA 02110-1301 USA | |
19 | ||
12e41d03 DL |
20 | */ |
21 | ||
22 | #include <zebra.h> | |
23 | #include "log.h" | |
24 | #include "privs.h" | |
744d91b3 | 25 | #include "if.h" |
065bee4b | 26 | #include "prefix.h" |
12e41d03 DL |
27 | |
28 | #include "pimd.h" | |
8e38a2cf | 29 | #include "pim_rpf.h" |
12e41d03 | 30 | #include "pim_mroute.h" |
37653d4f | 31 | #include "pim_oil.h" |
12e41d03 DL |
32 | #include "pim_str.h" |
33 | #include "pim_time.h" | |
34 | #include "pim_iface.h" | |
35 | #include "pim_macro.h" | |
c8ae3ce8 | 36 | #include "pim_rp.h" |
59471fb8 | 37 | #include "pim_oil.h" |
998af219 | 38 | #include "pim_register.h" |
56638739 | 39 | #include "pim_ifchannel.h" |
e3be0432 | 40 | #include "pim_zlookup.h" |
12e41d03 DL |
41 | |
42 | /* GLOBAL VARS */ | |
43 | extern struct zebra_privs_t pimd_privs; | |
44 | ||
45 | static void mroute_read_on(void); | |
46 | ||
47 | static int pim_mroute_set(int fd, int enable) | |
48 | { | |
49 | int err; | |
50 | int opt = enable ? MRT_INIT : MRT_DONE; | |
51 | socklen_t opt_len = sizeof(opt); | |
52 | ||
53 | err = setsockopt(fd, IPPROTO_IP, opt, &opt, opt_len); | |
54 | if (err) { | |
12e41d03 DL |
55 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,%s=%d): errno=%d: %s", |
56 | __FILE__, __PRETTY_FUNCTION__, | |
3d7765d7 | 57 | fd, enable ? "MRT_INIT" : "MRT_DONE", opt, errno, safe_strerror(errno)); |
12e41d03 DL |
58 | return -1; |
59 | } | |
60 | ||
87243934 DS |
61 | if (enable) |
62 | { | |
63 | int upcalls = IGMPMSG_WRVIFWHOLE; | |
64 | opt = MRT_PIM; | |
65 | ||
66 | err = setsockopt (fd, IPPROTO_IP, opt, &upcalls, sizeof (upcalls)); | |
67 | if (err) | |
68 | { | |
69 | zlog_warn ("Failure to register for VIFWHOLE and WRONGVIF upcalls %d %s", | |
70 | errno, safe_strerror (errno)); | |
71 | return -1; | |
72 | } | |
73 | } | |
74 | ||
12e41d03 DL |
75 | return 0; |
76 | } | |
77 | ||
065bee4b DS |
78 | static int |
79 | pim_mroute_connected_to_source (struct interface *ifp, struct in_addr src) | |
80 | { | |
81 | struct listnode *cnode; | |
82 | struct connected *c; | |
83 | struct prefix p; | |
84 | ||
85 | p.family = AF_INET; | |
86 | p.u.prefix4 = src; | |
87 | p.prefixlen = IPV4_MAX_BITLEN; | |
88 | ||
89 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, c)) | |
90 | { | |
91 | if ((c->address->family == AF_INET) && | |
92 | prefix_match (CONNECTED_PREFIX (c), &p)) | |
93 | { | |
94 | return 1; | |
95 | } | |
96 | } | |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
08e1fe76 | 101 | static const char *igmpmsgtype2str[IGMPMSG_WRVIFWHOLE + 1] = { |
e355e30f DS |
102 | "<unknown_upcall?>", |
103 | "NOCACHE", | |
104 | "WRONGVIF", | |
08e1fe76 DS |
105 | "WHOLEPKT", |
106 | "WRVIFWHOLE" }; | |
e355e30f DS |
107 | |
108 | static int | |
c29a5806 | 109 | pim_mroute_msg_nocache (int fd, struct interface *ifp, const struct igmpmsg *msg) |
12e41d03 | 110 | { |
04b40f02 | 111 | struct pim_interface *pim_ifp = ifp->info; |
59471fb8 | 112 | struct pim_upstream *up; |
065bee4b | 113 | struct pim_rpf *rpg; |
4ed0af70 | 114 | struct prefix_sg sg; |
04b40f02 | 115 | |
c8ae3ce8 | 116 | rpg = RP(msg->im_dst); |
04b40f02 DS |
117 | /* |
118 | * If the incoming interface is unknown OR | |
119 | * the Interface type is SSM we don't need to | |
120 | * do anything here | |
121 | */ | |
ed66602c | 122 | if ((rpg->rpf_addr.s_addr == INADDR_NONE) || |
04b40f02 | 123 | (!pim_ifp) || |
b45fd505 | 124 | (!(PIM_I_am_DR(pim_ifp))) || |
04b40f02 DS |
125 | (pim_ifp->itype == PIM_INTERFACE_SSM)) |
126 | return 0; | |
127 | ||
065bee4b DS |
128 | /* |
129 | * If we've received a multicast packet that isn't connected to | |
130 | * us | |
131 | */ | |
132 | if (!pim_mroute_connected_to_source (ifp, msg->im_src)) | |
133 | { | |
630f76b6 | 134 | if (PIM_DEBUG_MROUTE) |
065bee4b DS |
135 | zlog_debug ("%s: Received incoming packet that does originate on our seg", |
136 | __PRETTY_FUNCTION__); | |
137 | return 0; | |
138 | } | |
139 | ||
4ed0af70 DS |
140 | memset (&sg, 0, sizeof (struct prefix_sg)); |
141 | sg.src = msg->im_src; | |
142 | sg.grp = msg->im_dst; | |
c29a5806 DS |
143 | |
144 | if (PIM_DEBUG_MROUTE) { | |
145 | zlog_debug("%s: Adding a Route %s for WHOLEPKT consumption", | |
146 | __PRETTY_FUNCTION__, pim_str_sg_dump (&sg)); | |
147 | } | |
148 | ||
5074a423 | 149 | up = pim_upstream_add (&sg, ifp); |
59471fb8 | 150 | if (!up) { |
630f76b6 | 151 | if (PIM_DEBUG_MROUTE) { |
5074a423 | 152 | zlog_debug("%s: Failure to add upstream information for %s", |
59471fb8 | 153 | __PRETTY_FUNCTION__, |
5074a423 | 154 | pim_str_sg_dump (&sg)); |
59471fb8 DS |
155 | } |
156 | return 0; | |
157 | } | |
158 | ||
3667e8a0 DS |
159 | pim_upstream_keep_alive_timer_start (up, PIM_KEEPALIVE_PERIOD); |
160 | ||
05e451f8 | 161 | up->channel_oil = pim_channel_oil_add(&sg, |
59471fb8 DS |
162 | pim_ifp->mroute_vif_index); |
163 | if (!up->channel_oil) { | |
630f76b6 | 164 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 165 | zlog_debug("%s: Failure to add channel oil for %s", |
59471fb8 | 166 | __PRETTY_FUNCTION__, |
c29a5806 | 167 | pim_str_sg_dump (&sg)); |
59471fb8 DS |
168 | } |
169 | return 0; | |
170 | } | |
25a335e0 | 171 | up->channel_oil->cc.pktcnt++; |
56638739 | 172 | up->fhr = 1; |
8a294fa2 | 173 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); |
56638739 | 174 | up->join_state = PIM_UPSTREAM_JOINED; |
59471fb8 | 175 | |
e355e30f DS |
176 | return 0; |
177 | } | |
12e41d03 | 178 | |
e355e30f | 179 | static int |
c29a5806 | 180 | pim_mroute_msg_wholepkt (int fd, struct interface *ifp, const char *buf) |
e355e30f | 181 | { |
59471fb8 | 182 | struct pim_interface *pim_ifp; |
4ed0af70 | 183 | struct prefix_sg sg; |
ed66602c | 184 | struct pim_rpf *rpg; |
c8ae3ce8 | 185 | const struct ip *ip_hdr; |
59471fb8 | 186 | struct pim_upstream *up; |
04b40f02 | 187 | |
c8ae3ce8 DS |
188 | ip_hdr = (const struct ip *)buf; |
189 | ||
4ed0af70 DS |
190 | memset (&sg, 0, sizeof (struct prefix_sg)); |
191 | sg.src = ip_hdr->ip_src; | |
192 | sg.grp = ip_hdr->ip_dst; | |
c8ae3ce8 | 193 | |
5074a423 | 194 | up = pim_upstream_find(&sg); |
59471fb8 | 195 | if (!up) { |
630f76b6 | 196 | if (PIM_DEBUG_MROUTE) { |
5074a423 DS |
197 | zlog_debug("%s: Unable to find upstream channel WHOLEPKT%s", |
198 | __PRETTY_FUNCTION__, pim_str_sg_dump (&sg)); | |
59471fb8 DS |
199 | } |
200 | return 0; | |
201 | } | |
202 | ||
998af219 DS |
203 | pim_ifp = up->rpf.source_nexthop.interface->info; |
204 | ||
4ed0af70 | 205 | rpg = RP(sg.grp); |
c8ae3ce8 | 206 | |
ed66602c | 207 | if ((rpg->rpf_addr.s_addr == INADDR_NONE) || |
c8ae3ce8 | 208 | (!pim_ifp) || |
b45fd505 | 209 | (!(PIM_I_am_DR(pim_ifp))) || |
c8ae3ce8 | 210 | (pim_ifp->itype == PIM_INTERFACE_SSM)) { |
630f76b6 | 211 | if (PIM_DEBUG_MROUTE) { |
998af219 DS |
212 | zlog_debug("%s: Failed Check send packet", __PRETTY_FUNCTION__); |
213 | } | |
c8ae3ce8 | 214 | return 0; |
04b40f02 | 215 | } |
84366c7e | 216 | |
2ddab288 DS |
217 | /* |
218 | * If we've received a register suppress | |
219 | */ | |
220 | if (!up->t_rs_timer) | |
b100a4f5 | 221 | pim_register_send((uint8_t *)buf + sizeof(struct ip), ntohs (ip_hdr->ip_len), rpg, 0); |
2ddab288 | 222 | |
e355e30f DS |
223 | return 0; |
224 | } | |
12e41d03 | 225 | |
e355e30f | 226 | static int |
c29a5806 | 227 | pim_mroute_msg_wrongvif (int fd, struct interface *ifp, const struct igmpmsg *msg) |
e355e30f DS |
228 | { |
229 | struct pim_ifchannel *ch; | |
230 | struct pim_interface *pim_ifp; | |
4ed0af70 | 231 | struct prefix_sg sg; |
12e41d03 | 232 | |
c29a5806 DS |
233 | memset (&sg, 0, sizeof (struct prefix_sg)); |
234 | sg.src = msg->im_src; | |
235 | sg.grp = msg->im_dst; | |
236 | ||
e355e30f DS |
237 | /* |
238 | Send Assert(S,G) on iif as response to WRONGVIF kernel upcall. | |
12e41d03 | 239 | |
e355e30f DS |
240 | RFC 4601 4.8.2. PIM-SSM-Only Routers |
241 | ||
242 | iif is the incoming interface of the packet. | |
243 | if (iif is in inherited_olist(S,G)) { | |
244 | send Assert(S,G) on iif | |
245 | } | |
246 | */ | |
12e41d03 | 247 | |
e355e30f | 248 | if (!ifp) { |
630f76b6 | 249 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 250 | zlog_debug("%s: WRONGVIF (S,G)=%s could not find input interface for input_vif_index=%d", |
12e41d03 | 251 | __PRETTY_FUNCTION__, |
c29a5806 | 252 | pim_str_sg_dump (&sg), msg->im_vif); |
12e41d03 | 253 | } |
e355e30f DS |
254 | return -1; |
255 | } | |
12e41d03 | 256 | |
e355e30f DS |
257 | pim_ifp = ifp->info; |
258 | if (!pim_ifp) { | |
630f76b6 | 259 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 260 | zlog_debug("%s: WRONGVIF (S,G)=%s multicast not enabled on interface %s", |
e355e30f | 261 | __PRETTY_FUNCTION__, |
c29a5806 | 262 | pim_str_sg_dump (&sg), ifp->name); |
12e41d03 | 263 | } |
e355e30f DS |
264 | return -2; |
265 | } | |
12e41d03 | 266 | |
5074a423 | 267 | ch = pim_ifchannel_find(ifp, &sg); |
e355e30f | 268 | if (!ch) { |
630f76b6 | 269 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 270 | zlog_debug("%s: WRONGVIF (S,G)=%s could not find channel on interface %s", |
e355e30f | 271 | __PRETTY_FUNCTION__, |
c29a5806 | 272 | pim_str_sg_dump (&sg), ifp->name); |
12e41d03 | 273 | } |
e355e30f DS |
274 | return -3; |
275 | } | |
12e41d03 | 276 | |
e355e30f DS |
277 | /* |
278 | RFC 4601: 4.6.1. (S,G) Assert Message State Machine | |
279 | ||
280 | Transitions from NoInfo State | |
281 | ||
282 | An (S,G) data packet arrives on interface I, AND | |
283 | CouldAssert(S,G,I)==TRUE An (S,G) data packet arrived on an | |
284 | downstream interface that is in our (S,G) outgoing interface | |
285 | list. We optimistically assume that we will be the assert | |
286 | winner for this (S,G), and so we transition to the "I am Assert | |
287 | Winner" state and perform Actions A1 (below), which will | |
288 | initiate the assert negotiation for (S,G). | |
289 | */ | |
12e41d03 | 290 | |
e355e30f | 291 | if (ch->ifassert_state != PIM_IFASSERT_NOINFO) { |
630f76b6 | 292 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 293 | zlog_debug("%s: WRONGVIF (S,G)=%s channel is not on Assert NoInfo state for interface %s", |
e355e30f | 294 | __PRETTY_FUNCTION__, |
c29a5806 | 295 | pim_str_sg_dump (&sg), ifp->name); |
12e41d03 | 296 | } |
e355e30f DS |
297 | return -4; |
298 | } | |
12e41d03 | 299 | |
e355e30f | 300 | if (!PIM_IF_FLAG_TEST_COULD_ASSERT(ch->flags)) { |
630f76b6 | 301 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 302 | zlog_debug("%s: WRONGVIF (S,G)=%s interface %s is not downstream for channel", |
e355e30f | 303 | __PRETTY_FUNCTION__, |
c29a5806 | 304 | pim_str_sg_dump (&sg), ifp->name); |
12e41d03 | 305 | } |
e355e30f DS |
306 | return -5; |
307 | } | |
12e41d03 | 308 | |
e355e30f | 309 | if (assert_action_a1(ch)) { |
630f76b6 | 310 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 311 | zlog_debug("%s: WRONGVIF (S,G)=%s assert_action_a1 failure on interface %s", |
e355e30f | 312 | __PRETTY_FUNCTION__, |
c29a5806 | 313 | pim_str_sg_dump (&sg), ifp->name); |
12e41d03 | 314 | } |
e355e30f DS |
315 | return -6; |
316 | } | |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
08e1fe76 DS |
321 | static int |
322 | pim_mroute_msg_wrvifwhole (int fd, struct interface *ifp, const char *buf) | |
323 | { | |
324 | const struct ip *ip_hdr = (const struct ip *)buf; | |
325 | struct pim_interface *pim_ifp; | |
326 | struct pim_ifchannel *ch; | |
327 | struct pim_upstream *up; | |
328 | struct prefix_sg sg; | |
329 | ||
330 | memset (&sg, 0, sizeof (struct prefix_sg)); | |
331 | sg.src = ip_hdr->ip_src; | |
332 | sg.grp = ip_hdr->ip_dst; | |
333 | ||
334 | if (PIM_DEBUG_MROUTE) | |
335 | zlog_debug ("Received WHOLEPKT Wrong Vif for %s on %s", | |
336 | pim_str_sg_dump (&sg), ifp->name); | |
337 | ||
338 | ch = pim_ifchannel_find(ifp, &sg); | |
339 | if (ch) | |
340 | { | |
341 | if (PIM_DEBUG_MROUTE) | |
342 | zlog_debug ("WRVIFWHOLE (S,G)=%s found ifchannel on interface %s", | |
343 | pim_str_sg_dump (&sg), ifp->name); | |
344 | return -1; | |
345 | } | |
346 | ||
347 | if (PIM_DEBUG_MROUTE) | |
348 | zlog_debug ("If channel: %p", ch); | |
349 | ||
8e38a2cf DS |
350 | up = pim_upstream_find (&sg); |
351 | if (up) | |
352 | { | |
353 | struct pim_nexthop source; | |
354 | //No if channel, but upstream we are at the RP. | |
355 | pim_nexthop_lookup (&source, up->upstream_register, NULL); | |
356 | pim_register_stop_send(source.interface, &sg, up->upstream_register); | |
357 | //Send S bit down the join. | |
4712642e | 358 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
8e38a2cf DS |
359 | return 0; |
360 | } | |
361 | ||
08e1fe76 DS |
362 | up = pim_upstream_add (&sg, ifp); |
363 | ||
364 | if (!up) | |
365 | { | |
366 | if (PIM_DEBUG_MROUTE) | |
367 | zlog_debug ("%s: WRONGVIF%s unable to create upstream on interface", | |
368 | pim_str_sg_dump (&sg), ifp->name); | |
369 | return -2; | |
370 | } | |
371 | ||
372 | if (pim_mroute_connected_to_source (ifp, sg.src)) | |
373 | up->fhr = 1; | |
374 | ||
375 | pim_ifp = ifp->info; | |
376 | pim_upstream_keep_alive_timer_start (up, PIM_KEEPALIVE_PERIOD); | |
377 | up->channel_oil = pim_channel_oil_add (&sg, pim_ifp->mroute_vif_index); | |
378 | up->channel_oil->cc.pktcnt++; | |
379 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
380 | up->join_state = PIM_UPSTREAM_JOINED; | |
381 | pim_upstream_inherited_olist (up); | |
382 | ||
383 | // Send the packet to the RP | |
384 | pim_mroute_msg_wholepkt (fd, ifp, buf); | |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
e355e30f DS |
389 | int pim_mroute_msg(int fd, const char *buf, int buf_size) |
390 | { | |
391 | struct interface *ifp; | |
392 | const struct ip *ip_hdr; | |
393 | const struct igmpmsg *msg; | |
394 | char src_str[100] = "<src?>"; | |
395 | char grp_str[100] = "<grp?>"; | |
12e41d03 | 396 | |
e355e30f DS |
397 | ip_hdr = (const struct ip *) buf; |
398 | ||
399 | /* kernel upcall must have protocol=0 */ | |
400 | if (ip_hdr->ip_p) { | |
401 | /* this is not a kernel upcall */ | |
630f76b6 | 402 | if (PIM_DEBUG_MROUTE) { |
e5d33c83 DS |
403 | pim_inet4_dump("<src?>", ip_hdr->ip_src, src_str, sizeof(src_str)); |
404 | pim_inet4_dump("<grp?>", ip_hdr->ip_dst, grp_str, sizeof(grp_str)); | |
405 | zlog_debug("%s: not a kernel upcall proto=%d src: %s dst: %s msg_size=%d", | |
406 | __PRETTY_FUNCTION__, ip_hdr->ip_p, src_str, grp_str, buf_size); | |
e355e30f | 407 | } |
12e41d03 | 408 | return 0; |
e355e30f DS |
409 | } |
410 | ||
411 | msg = (const struct igmpmsg *) buf; | |
412 | ||
413 | ifp = pim_if_find_by_vif_index(msg->im_vif); | |
414 | ||
630f76b6 | 415 | if (PIM_DEBUG_MROUTE) { |
e355e30f DS |
416 | pim_inet4_dump("<src?>", msg->im_src, src_str, sizeof(src_str)); |
417 | pim_inet4_dump("<grp?>", msg->im_dst, grp_str, sizeof(grp_str)); | |
418 | zlog_warn("%s: kernel upcall %s type=%d ip_p=%d from fd=%d for (S,G)=(%s,%s) on %s vifi=%d", | |
419 | __PRETTY_FUNCTION__, | |
420 | igmpmsgtype2str[msg->im_msgtype], | |
421 | msg->im_msgtype, | |
422 | ip_hdr->ip_p, | |
423 | fd, | |
424 | src_str, | |
425 | grp_str, | |
0bc327f7 | 426 | ifp->name, |
e355e30f DS |
427 | msg->im_vif); |
428 | } | |
429 | ||
430 | switch (msg->im_msgtype) { | |
431 | case IGMPMSG_WRONGVIF: | |
c29a5806 | 432 | return pim_mroute_msg_wrongvif(fd, ifp, msg); |
e355e30f DS |
433 | break; |
434 | case IGMPMSG_NOCACHE: | |
c29a5806 | 435 | return pim_mroute_msg_nocache(fd, ifp, msg); |
e355e30f DS |
436 | break; |
437 | case IGMPMSG_WHOLEPKT: | |
c29a5806 | 438 | return pim_mroute_msg_wholepkt(fd, ifp, (const char *)msg); |
e355e30f | 439 | break; |
08e1fe76 DS |
440 | case IGMPMSG_WRVIFWHOLE: |
441 | return pim_mroute_msg_wrvifwhole (fd, ifp, (const char *)msg); | |
442 | break; | |
e355e30f DS |
443 | default: |
444 | break; | |
445 | } | |
12e41d03 DL |
446 | |
447 | return 0; | |
448 | } | |
449 | ||
450 | static int mroute_read_msg(int fd) | |
451 | { | |
f0ce50d4 | 452 | char buf[2000]; |
12e41d03 DL |
453 | int rd; |
454 | ||
12e41d03 DL |
455 | rd = read(fd, buf, sizeof(buf)); |
456 | if (rd < 0) { | |
457 | zlog_warn("%s: failure reading fd=%d: errno=%d: %s", | |
458 | __PRETTY_FUNCTION__, fd, errno, safe_strerror(errno)); | |
f0ce50d4 | 459 | return -1; |
12e41d03 DL |
460 | } |
461 | ||
462 | return pim_mroute_msg(fd, buf, rd); | |
463 | } | |
464 | ||
465 | static int mroute_read(struct thread *t) | |
466 | { | |
467 | int fd; | |
468 | int result; | |
469 | ||
470 | zassert(t); | |
471 | zassert(!THREAD_ARG(t)); | |
472 | ||
473 | fd = THREAD_FD(t); | |
474 | zassert(fd == qpim_mroute_socket_fd); | |
475 | ||
476 | result = mroute_read_msg(fd); | |
477 | ||
478 | /* Keep reading */ | |
479 | qpim_mroute_socket_reader = 0; | |
480 | mroute_read_on(); | |
481 | ||
482 | return result; | |
483 | } | |
484 | ||
485 | static void mroute_read_on() | |
486 | { | |
487 | zassert(!qpim_mroute_socket_reader); | |
488 | zassert(PIM_MROUTE_IS_ENABLED); | |
489 | ||
490 | THREAD_READ_ON(master, qpim_mroute_socket_reader, | |
491 | mroute_read, 0, qpim_mroute_socket_fd); | |
492 | } | |
493 | ||
494 | static void mroute_read_off() | |
495 | { | |
496 | THREAD_OFF(qpim_mroute_socket_reader); | |
497 | } | |
498 | ||
499 | int pim_mroute_socket_enable() | |
500 | { | |
501 | int fd; | |
502 | ||
503 | if (PIM_MROUTE_IS_ENABLED) | |
504 | return -1; | |
505 | ||
506 | if ( pimd_privs.change (ZPRIVS_RAISE) ) | |
507 | zlog_err ("pim_mroute_socket_enable: could not raise privs, %s", | |
508 | safe_strerror (errno) ); | |
509 | ||
510 | fd = socket(AF_INET, SOCK_RAW, IPPROTO_IGMP); | |
511 | ||
512 | if ( pimd_privs.change (ZPRIVS_LOWER) ) | |
513 | zlog_err ("pim_mroute_socket_enable: could not lower privs, %s", | |
514 | safe_strerror (errno) ); | |
515 | ||
516 | if (fd < 0) { | |
517 | zlog_warn("Could not create mroute socket: errno=%d: %s", | |
518 | errno, safe_strerror(errno)); | |
519 | return -2; | |
520 | } | |
521 | ||
522 | if (pim_mroute_set(fd, 1)) { | |
523 | zlog_warn("Could not enable mroute on socket fd=%d: errno=%d: %s", | |
524 | fd, errno, safe_strerror(errno)); | |
525 | close(fd); | |
526 | return -3; | |
527 | } | |
528 | ||
529 | qpim_mroute_socket_fd = fd; | |
b45cefcb | 530 | |
12e41d03 DL |
531 | qpim_mroute_socket_creation = pim_time_monotonic_sec(); |
532 | mroute_read_on(); | |
533 | ||
12e41d03 DL |
534 | return 0; |
535 | } | |
536 | ||
537 | int pim_mroute_socket_disable() | |
538 | { | |
539 | if (PIM_MROUTE_IS_DISABLED) | |
540 | return -1; | |
541 | ||
542 | if (pim_mroute_set(qpim_mroute_socket_fd, 0)) { | |
543 | zlog_warn("Could not disable mroute on socket fd=%d: errno=%d: %s", | |
544 | qpim_mroute_socket_fd, errno, safe_strerror(errno)); | |
545 | return -2; | |
546 | } | |
547 | ||
548 | if (close(qpim_mroute_socket_fd)) { | |
549 | zlog_warn("Failure closing mroute socket: fd=%d errno=%d: %s", | |
550 | qpim_mroute_socket_fd, errno, safe_strerror(errno)); | |
551 | return -3; | |
552 | } | |
553 | ||
554 | mroute_read_off(); | |
555 | qpim_mroute_socket_fd = -1; | |
556 | ||
12e41d03 DL |
557 | return 0; |
558 | } | |
559 | ||
560 | /* | |
561 | For each network interface (e.g., physical or a virtual tunnel) that | |
562 | would be used for multicast forwarding, a corresponding multicast | |
563 | interface must be added to the kernel. | |
564 | */ | |
744d91b3 | 565 | int pim_mroute_add_vif(struct interface *ifp, struct in_addr ifaddr, unsigned char flags) |
12e41d03 | 566 | { |
744d91b3 | 567 | struct pim_interface *pim_ifp = ifp->info; |
12e41d03 DL |
568 | struct vifctl vc; |
569 | int err; | |
570 | ||
571 | if (PIM_MROUTE_IS_DISABLED) { | |
572 | zlog_warn("%s: global multicast is disabled", | |
573 | __PRETTY_FUNCTION__); | |
574 | return -1; | |
575 | } | |
576 | ||
577 | memset(&vc, 0, sizeof(vc)); | |
744d91b3 | 578 | vc.vifc_vifi = pim_ifp->mroute_vif_index; |
b3f2bf7c | 579 | #ifdef VIFF_USE_IFINDEX |
744d91b3 | 580 | vc.vifc_lcl_ifindex = ifp->ifindex; |
b3f2bf7c RW |
581 | #else |
582 | if (ifaddr.s_addr == INADDR_ANY) { | |
583 | zlog_warn("%s: unnumbered interfaces are not supported on this platform", | |
584 | __PRETTY_FUNCTION__); | |
585 | return -1; | |
586 | } | |
587 | memcpy(&vc.vifc_lcl_addr, &ifaddr, sizeof(vc.vifc_lcl_addr)); | |
588 | #endif | |
b45cefcb | 589 | vc.vifc_flags = flags; |
12e41d03 DL |
590 | vc.vifc_threshold = PIM_MROUTE_MIN_TTL; |
591 | vc.vifc_rate_limit = 0; | |
12e41d03 DL |
592 | |
593 | #ifdef PIM_DVMRP_TUNNEL | |
594 | if (vc.vifc_flags & VIFF_TUNNEL) { | |
595 | memcpy(&vc.vifc_rmt_addr, &vif_remote_addr, sizeof(vc.vifc_rmt_addr)); | |
596 | } | |
597 | #endif | |
598 | ||
b45cefcb | 599 | err = setsockopt(qpim_mroute_socket_fd, IPPROTO_IP, MRT_ADD_VIF, (void*) &vc, sizeof(vc)); |
12e41d03 DL |
600 | if (err) { |
601 | char ifaddr_str[100]; | |
12e41d03 DL |
602 | |
603 | pim_inet4_dump("<ifaddr?>", ifaddr, ifaddr_str, sizeof(ifaddr_str)); | |
604 | ||
59471fb8 | 605 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_ADD_VIF,vif_index=%d,ifaddr=%s,flag=%d): errno=%d: %s", |
12e41d03 | 606 | __FILE__, __PRETTY_FUNCTION__, |
744d91b3 | 607 | qpim_mroute_socket_fd, ifp->ifindex, ifaddr_str, flags, |
3d7765d7 | 608 | errno, safe_strerror(errno)); |
12e41d03 DL |
609 | return -2; |
610 | } | |
611 | ||
612 | return 0; | |
613 | } | |
614 | ||
615 | int pim_mroute_del_vif(int vif_index) | |
616 | { | |
617 | struct vifctl vc; | |
618 | int err; | |
619 | ||
620 | if (PIM_MROUTE_IS_DISABLED) { | |
621 | zlog_warn("%s: global multicast is disabled", | |
622 | __PRETTY_FUNCTION__); | |
623 | return -1; | |
624 | } | |
625 | ||
626 | memset(&vc, 0, sizeof(vc)); | |
627 | vc.vifc_vifi = vif_index; | |
628 | ||
629 | err = setsockopt(qpim_mroute_socket_fd, IPPROTO_IP, MRT_DEL_VIF, (void*) &vc, sizeof(vc)); | |
630 | if (err) { | |
12e41d03 DL |
631 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_DEL_VIF,vif_index=%d): errno=%d: %s", |
632 | __FILE__, __PRETTY_FUNCTION__, | |
633 | qpim_mroute_socket_fd, vif_index, | |
3d7765d7 | 634 | errno, safe_strerror(errno)); |
12e41d03 DL |
635 | return -2; |
636 | } | |
637 | ||
638 | return 0; | |
639 | } | |
640 | ||
c171d6d8 | 641 | int pim_mroute_add(struct channel_oil *c_oil) |
12e41d03 DL |
642 | { |
643 | int err; | |
2ca35b3d | 644 | int orig = 0; |
0365f56b | 645 | int orig_iif_vif = 0; |
12e41d03 DL |
646 | |
647 | qpim_mroute_add_last = pim_time_monotonic_sec(); | |
648 | ++qpim_mroute_add_events; | |
649 | ||
650 | if (PIM_MROUTE_IS_DISABLED) { | |
651 | zlog_warn("%s: global multicast is disabled", | |
652 | __PRETTY_FUNCTION__); | |
653 | return -1; | |
654 | } | |
655 | ||
d3aded99 DS |
656 | /* The linux kernel *expects* the incoming |
657 | * vif to be part of the outgoing list | |
658 | * in the case of a (*,G). | |
659 | */ | |
c171d6d8 | 660 | if (c_oil->oil.mfcc_origin.s_addr == INADDR_ANY) |
d3aded99 | 661 | { |
c171d6d8 DS |
662 | orig = c_oil->oil.mfcc_ttls[c_oil->oil.mfcc_parent]; |
663 | c_oil->oil.mfcc_ttls[c_oil->oil.mfcc_parent] = 1; | |
d3aded99 DS |
664 | } |
665 | ||
0365f56b DS |
666 | /* |
667 | * If we have an unresolved cache entry for the S,G | |
668 | * it is owned by the pimreg for the incoming IIF | |
669 | * So set pimreg as the IIF temporarily to cause | |
670 | * the packets to be forwarded. Then set it | |
671 | * to the correct IIF afterwords. | |
672 | */ | |
673 | if (!c_oil->installed && c_oil->oil.mfcc_origin.s_addr != INADDR_ANY && | |
674 | c_oil->oil.mfcc_parent != 0) | |
675 | { | |
676 | orig_iif_vif = c_oil->oil.mfcc_parent; | |
677 | c_oil->oil.mfcc_parent = 0; | |
678 | } | |
12e41d03 | 679 | err = setsockopt(qpim_mroute_socket_fd, IPPROTO_IP, MRT_ADD_MFC, |
c171d6d8 | 680 | &c_oil->oil, sizeof(c_oil->oil)); |
d3aded99 | 681 | |
0365f56b DS |
682 | if (!err && !c_oil->installed && c_oil->oil.mfcc_origin.s_addr != INADDR_ANY && |
683 | orig_iif_vif != 0) | |
684 | { | |
685 | c_oil->oil.mfcc_parent = orig_iif_vif; | |
686 | err = setsockopt (qpim_mroute_socket_fd, IPPROTO_IP, MRT_ADD_MFC, | |
687 | &c_oil->oil, sizeof (c_oil->oil)); | |
688 | } | |
689 | ||
c171d6d8 DS |
690 | if (c_oil->oil.mfcc_origin.s_addr == INADDR_ANY) |
691 | c_oil->oil.mfcc_ttls[c_oil->oil.mfcc_parent] = orig; | |
d3aded99 | 692 | |
12e41d03 | 693 | if (err) { |
12e41d03 DL |
694 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_ADD_MFC): errno=%d: %s", |
695 | __FILE__, __PRETTY_FUNCTION__, | |
696 | qpim_mroute_socket_fd, | |
3d7765d7 | 697 | errno, safe_strerror(errno)); |
12e41d03 DL |
698 | return -2; |
699 | } | |
700 | ||
58302dc7 | 701 | c_oil->installed = 1; |
12e41d03 DL |
702 | return 0; |
703 | } | |
704 | ||
c171d6d8 | 705 | int pim_mroute_del (struct channel_oil *c_oil) |
12e41d03 DL |
706 | { |
707 | int err; | |
708 | ||
709 | qpim_mroute_del_last = pim_time_monotonic_sec(); | |
710 | ++qpim_mroute_del_events; | |
711 | ||
712 | if (PIM_MROUTE_IS_DISABLED) { | |
713 | zlog_warn("%s: global multicast is disabled", | |
714 | __PRETTY_FUNCTION__); | |
715 | return -1; | |
716 | } | |
717 | ||
c171d6d8 | 718 | err = setsockopt(qpim_mroute_socket_fd, IPPROTO_IP, MRT_DEL_MFC, &c_oil->oil, sizeof(c_oil->oil)); |
12e41d03 | 719 | if (err) { |
12e41d03 DL |
720 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_DEL_MFC): errno=%d: %s", |
721 | __FILE__, __PRETTY_FUNCTION__, | |
722 | qpim_mroute_socket_fd, | |
3d7765d7 | 723 | errno, safe_strerror(errno)); |
12e41d03 DL |
724 | return -2; |
725 | } | |
726 | ||
58302dc7 DS |
727 | c_oil->installed = 0; |
728 | ||
12e41d03 DL |
729 | return 0; |
730 | } | |
3667e8a0 DS |
731 | |
732 | void | |
733 | pim_mroute_update_counters (struct channel_oil *c_oil) | |
734 | { | |
735 | struct sioc_sg_req sgreq; | |
736 | ||
737 | memset (&sgreq, 0, sizeof(sgreq)); | |
738 | sgreq.src = c_oil->oil.mfcc_origin; | |
739 | sgreq.grp = c_oil->oil.mfcc_mcastgrp; | |
740 | ||
741 | c_oil->cc.oldpktcnt = c_oil->cc.pktcnt; | |
742 | c_oil->cc.oldbytecnt = c_oil->cc.bytecnt; | |
743 | c_oil->cc.oldwrong_if = c_oil->cc.wrong_if; | |
e3be0432 | 744 | c_oil->cc.oldlastused = c_oil->cc.lastused; |
3667e8a0 DS |
745 | |
746 | if (ioctl (qpim_mroute_socket_fd, SIOCGETSGCNT, &sgreq)) | |
747 | { | |
748 | char group_str[100]; | |
749 | char source_str[100]; | |
750 | ||
751 | pim_inet4_dump("<group?>", c_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); | |
752 | pim_inet4_dump("<source?>", c_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
753 | ||
754 | zlog_warn ("ioctl(SIOCGETSGCNT=%lu) failure for (S,G)=(%s,%s): errno=%d: %s", | |
755 | (unsigned long)SIOCGETSGCNT, | |
756 | source_str, | |
757 | group_str, | |
758 | errno, | |
759 | safe_strerror(errno)); | |
760 | return; | |
761 | } | |
762 | ||
e3be0432 | 763 | pim_zlookup_sg_statistics (c_oil); |
3667e8a0 DS |
764 | c_oil->cc.pktcnt = sgreq.pktcnt; |
765 | c_oil->cc.bytecnt = sgreq.bytecnt; | |
766 | c_oil->cc.wrong_if = sgreq.wrong_if; | |
767 | ||
768 | return; | |
769 | } |