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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" |
dfe43e25 DW |
27 | #include "vty.h" |
28 | #include "plist.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" |
12e41d03 DL |
43 | |
44 | /* GLOBAL VARS */ | |
45 | extern struct zebra_privs_t pimd_privs; | |
46 | ||
47 | static void mroute_read_on(void); | |
48 | ||
49 | static int pim_mroute_set(int fd, int enable) | |
50 | { | |
51 | int err; | |
52 | int opt = enable ? MRT_INIT : MRT_DONE; | |
53 | socklen_t opt_len = sizeof(opt); | |
54 | ||
55 | err = setsockopt(fd, IPPROTO_IP, opt, &opt, opt_len); | |
56 | if (err) { | |
12e41d03 DL |
57 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,%s=%d): errno=%d: %s", |
58 | __FILE__, __PRETTY_FUNCTION__, | |
3d7765d7 | 59 | fd, enable ? "MRT_INIT" : "MRT_DONE", opt, errno, safe_strerror(errno)); |
12e41d03 DL |
60 | return -1; |
61 | } | |
62 | ||
87243934 DS |
63 | if (enable) |
64 | { | |
65 | int upcalls = IGMPMSG_WRVIFWHOLE; | |
66 | opt = MRT_PIM; | |
67 | ||
68 | err = setsockopt (fd, IPPROTO_IP, opt, &upcalls, sizeof (upcalls)); | |
69 | if (err) | |
70 | { | |
71 | zlog_warn ("Failure to register for VIFWHOLE and WRONGVIF upcalls %d %s", | |
72 | errno, safe_strerror (errno)); | |
73 | return -1; | |
74 | } | |
75 | } | |
76 | ||
12e41d03 DL |
77 | return 0; |
78 | } | |
79 | ||
08e1fe76 | 80 | static const char *igmpmsgtype2str[IGMPMSG_WRVIFWHOLE + 1] = { |
e355e30f DS |
81 | "<unknown_upcall?>", |
82 | "NOCACHE", | |
83 | "WRONGVIF", | |
08e1fe76 DS |
84 | "WHOLEPKT", |
85 | "WRVIFWHOLE" }; | |
e355e30f DS |
86 | |
87 | static int | |
c29a5806 | 88 | pim_mroute_msg_nocache (int fd, struct interface *ifp, const struct igmpmsg *msg) |
12e41d03 | 89 | { |
04b40f02 | 90 | struct pim_interface *pim_ifp = ifp->info; |
59471fb8 | 91 | struct pim_upstream *up; |
065bee4b | 92 | struct pim_rpf *rpg; |
4ed0af70 | 93 | struct prefix_sg sg; |
5f6f65b1 | 94 | struct channel_oil *oil; |
04b40f02 | 95 | |
c8ae3ce8 | 96 | rpg = RP(msg->im_dst); |
04b40f02 DS |
97 | /* |
98 | * If the incoming interface is unknown OR | |
99 | * the Interface type is SSM we don't need to | |
100 | * do anything here | |
101 | */ | |
63c59d0c | 102 | if ((pim_rpf_addr_is_inaddr_none (rpg)) || |
04b40f02 | 103 | (!pim_ifp) || |
b45fd505 | 104 | (!(PIM_I_am_DR(pim_ifp))) || |
04b40f02 | 105 | (pim_ifp->itype == PIM_INTERFACE_SSM)) |
ffac1326 DS |
106 | { |
107 | if (PIM_DEBUG_MROUTE_DETAIL) | |
108 | zlog_debug ("%s: Interface is not configured correctly to handle incoming packet: Could be !DR, !pim_ifp, !SM, !RP", | |
109 | __PRETTY_FUNCTION__); | |
110 | return 0; | |
111 | } | |
04b40f02 | 112 | |
065bee4b DS |
113 | /* |
114 | * If we've received a multicast packet that isn't connected to | |
115 | * us | |
116 | */ | |
3565202d | 117 | if (!pim_if_connected_to_source (ifp, msg->im_src)) |
065bee4b | 118 | { |
6c7197b1 | 119 | if (PIM_DEBUG_MROUTE_DETAIL) |
8f547471 | 120 | zlog_debug ("%s: Received incoming packet that doesn't originate on our seg", |
065bee4b DS |
121 | __PRETTY_FUNCTION__); |
122 | return 0; | |
123 | } | |
124 | ||
4ed0af70 DS |
125 | memset (&sg, 0, sizeof (struct prefix_sg)); |
126 | sg.src = msg->im_src; | |
127 | sg.grp = msg->im_dst; | |
c29a5806 DS |
128 | |
129 | if (PIM_DEBUG_MROUTE) { | |
130 | zlog_debug("%s: Adding a Route %s for WHOLEPKT consumption", | |
131 | __PRETTY_FUNCTION__, pim_str_sg_dump (&sg)); | |
132 | } | |
133 | ||
5f6f65b1 DS |
134 | oil = pim_channel_oil_add (&sg, pim_ifp->mroute_vif_index); |
135 | if (!oil) { | |
630f76b6 | 136 | if (PIM_DEBUG_MROUTE) { |
5f6f65b1 | 137 | zlog_debug("%s: Failure to add channel oil for %s", |
59471fb8 | 138 | __PRETTY_FUNCTION__, |
5074a423 | 139 | pim_str_sg_dump (&sg)); |
59471fb8 DS |
140 | } |
141 | return 0; | |
142 | } | |
143 | ||
e5905a3b | 144 | up = pim_upstream_add (&sg, ifp, PIM_UPSTREAM_FLAG_MASK_FHR, __PRETTY_FUNCTION__); |
5f6f65b1 | 145 | if (!up) { |
630f76b6 | 146 | if (PIM_DEBUG_MROUTE) { |
5f6f65b1 | 147 | zlog_debug("%s: Failure to add upstream information for %s", |
59471fb8 | 148 | __PRETTY_FUNCTION__, |
c29a5806 | 149 | pim_str_sg_dump (&sg)); |
59471fb8 DS |
150 | } |
151 | return 0; | |
152 | } | |
a9b59879 | 153 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); |
3c72d654 | 154 | pim_upstream_set_created_by_upstream(up); |
5f6f65b1 DS |
155 | |
156 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); | |
157 | ||
158 | up->channel_oil = oil; | |
25a335e0 | 159 | up->channel_oil->cc.pktcnt++; |
0bf27c5c | 160 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); |
8a294fa2 | 161 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); |
56638739 | 162 | up->join_state = PIM_UPSTREAM_JOINED; |
59471fb8 | 163 | |
e355e30f DS |
164 | return 0; |
165 | } | |
12e41d03 | 166 | |
e355e30f | 167 | static int |
c29a5806 | 168 | pim_mroute_msg_wholepkt (int fd, struct interface *ifp, const char *buf) |
e355e30f | 169 | { |
59471fb8 | 170 | struct pim_interface *pim_ifp; |
4ed0af70 | 171 | struct prefix_sg sg; |
ed66602c | 172 | struct pim_rpf *rpg; |
c8ae3ce8 | 173 | const struct ip *ip_hdr; |
59471fb8 | 174 | struct pim_upstream *up; |
04b40f02 | 175 | |
c8ae3ce8 DS |
176 | ip_hdr = (const struct ip *)buf; |
177 | ||
4ed0af70 DS |
178 | memset (&sg, 0, sizeof (struct prefix_sg)); |
179 | sg.src = ip_hdr->ip_src; | |
180 | sg.grp = ip_hdr->ip_dst; | |
c8ae3ce8 | 181 | |
5074a423 | 182 | up = pim_upstream_find(&sg); |
59471fb8 | 183 | if (!up) { |
6c7197b1 | 184 | if (PIM_DEBUG_MROUTE_DETAIL) { |
5074a423 DS |
185 | zlog_debug("%s: Unable to find upstream channel WHOLEPKT%s", |
186 | __PRETTY_FUNCTION__, pim_str_sg_dump (&sg)); | |
59471fb8 DS |
187 | } |
188 | return 0; | |
189 | } | |
190 | ||
998af219 DS |
191 | pim_ifp = up->rpf.source_nexthop.interface->info; |
192 | ||
4ed0af70 | 193 | rpg = RP(sg.grp); |
c8ae3ce8 | 194 | |
63c59d0c | 195 | if ((pim_rpf_addr_is_inaddr_none (rpg)) || |
c8ae3ce8 | 196 | (!pim_ifp) || |
b45fd505 | 197 | (!(PIM_I_am_DR(pim_ifp))) || |
c8ae3ce8 | 198 | (pim_ifp->itype == PIM_INTERFACE_SSM)) { |
630f76b6 | 199 | if (PIM_DEBUG_MROUTE) { |
998af219 DS |
200 | zlog_debug("%s: Failed Check send packet", __PRETTY_FUNCTION__); |
201 | } | |
c8ae3ce8 | 202 | return 0; |
04b40f02 | 203 | } |
84366c7e | 204 | |
2ddab288 DS |
205 | /* |
206 | * If we've received a register suppress | |
207 | */ | |
208 | if (!up->t_rs_timer) | |
4df01a4e DS |
209 | pim_register_send((uint8_t *)buf + sizeof(struct ip), ntohs (ip_hdr->ip_len), |
210 | pim_ifp->primary_address, rpg, 0); | |
2ddab288 | 211 | |
e355e30f DS |
212 | return 0; |
213 | } | |
12e41d03 | 214 | |
e355e30f | 215 | static int |
c29a5806 | 216 | pim_mroute_msg_wrongvif (int fd, struct interface *ifp, const struct igmpmsg *msg) |
e355e30f DS |
217 | { |
218 | struct pim_ifchannel *ch; | |
219 | struct pim_interface *pim_ifp; | |
4ed0af70 | 220 | struct prefix_sg sg; |
12e41d03 | 221 | |
c29a5806 DS |
222 | memset (&sg, 0, sizeof (struct prefix_sg)); |
223 | sg.src = msg->im_src; | |
224 | sg.grp = msg->im_dst; | |
225 | ||
e355e30f DS |
226 | /* |
227 | Send Assert(S,G) on iif as response to WRONGVIF kernel upcall. | |
12e41d03 | 228 | |
e355e30f DS |
229 | RFC 4601 4.8.2. PIM-SSM-Only Routers |
230 | ||
231 | iif is the incoming interface of the packet. | |
232 | if (iif is in inherited_olist(S,G)) { | |
233 | send Assert(S,G) on iif | |
234 | } | |
235 | */ | |
12e41d03 | 236 | |
e355e30f | 237 | if (!ifp) { |
630f76b6 | 238 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 239 | zlog_debug("%s: WRONGVIF (S,G)=%s could not find input interface for input_vif_index=%d", |
12e41d03 | 240 | __PRETTY_FUNCTION__, |
c29a5806 | 241 | pim_str_sg_dump (&sg), msg->im_vif); |
12e41d03 | 242 | } |
e355e30f DS |
243 | return -1; |
244 | } | |
12e41d03 | 245 | |
e355e30f DS |
246 | pim_ifp = ifp->info; |
247 | if (!pim_ifp) { | |
630f76b6 | 248 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 249 | zlog_debug("%s: WRONGVIF (S,G)=%s multicast not enabled on interface %s", |
e355e30f | 250 | __PRETTY_FUNCTION__, |
c29a5806 | 251 | pim_str_sg_dump (&sg), ifp->name); |
12e41d03 | 252 | } |
e355e30f DS |
253 | return -2; |
254 | } | |
12e41d03 | 255 | |
5074a423 | 256 | ch = pim_ifchannel_find(ifp, &sg); |
e355e30f | 257 | if (!ch) { |
630f76b6 | 258 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 259 | zlog_debug("%s: WRONGVIF (S,G)=%s could not find channel on interface %s", |
e355e30f | 260 | __PRETTY_FUNCTION__, |
c29a5806 | 261 | pim_str_sg_dump (&sg), ifp->name); |
12e41d03 | 262 | } |
e355e30f DS |
263 | return -3; |
264 | } | |
12e41d03 | 265 | |
e355e30f DS |
266 | /* |
267 | RFC 4601: 4.6.1. (S,G) Assert Message State Machine | |
268 | ||
269 | Transitions from NoInfo State | |
270 | ||
271 | An (S,G) data packet arrives on interface I, AND | |
272 | CouldAssert(S,G,I)==TRUE An (S,G) data packet arrived on an | |
273 | downstream interface that is in our (S,G) outgoing interface | |
274 | list. We optimistically assume that we will be the assert | |
275 | winner for this (S,G), and so we transition to the "I am Assert | |
276 | Winner" state and perform Actions A1 (below), which will | |
277 | initiate the assert negotiation for (S,G). | |
278 | */ | |
12e41d03 | 279 | |
e355e30f | 280 | if (ch->ifassert_state != PIM_IFASSERT_NOINFO) { |
630f76b6 | 281 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 282 | zlog_debug("%s: WRONGVIF (S,G)=%s channel is not on Assert NoInfo state for interface %s", |
e355e30f | 283 | __PRETTY_FUNCTION__, |
c29a5806 | 284 | pim_str_sg_dump (&sg), ifp->name); |
12e41d03 | 285 | } |
e355e30f DS |
286 | return -4; |
287 | } | |
12e41d03 | 288 | |
e355e30f | 289 | if (!PIM_IF_FLAG_TEST_COULD_ASSERT(ch->flags)) { |
630f76b6 | 290 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 291 | zlog_debug("%s: WRONGVIF (S,G)=%s interface %s is not downstream for channel", |
e355e30f | 292 | __PRETTY_FUNCTION__, |
c29a5806 | 293 | pim_str_sg_dump (&sg), ifp->name); |
12e41d03 | 294 | } |
e355e30f DS |
295 | return -5; |
296 | } | |
12e41d03 | 297 | |
e355e30f | 298 | if (assert_action_a1(ch)) { |
630f76b6 | 299 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 300 | zlog_debug("%s: WRONGVIF (S,G)=%s assert_action_a1 failure on interface %s", |
e355e30f | 301 | __PRETTY_FUNCTION__, |
c29a5806 | 302 | pim_str_sg_dump (&sg), ifp->name); |
12e41d03 | 303 | } |
e355e30f DS |
304 | return -6; |
305 | } | |
306 | ||
307 | return 0; | |
308 | } | |
309 | ||
08e1fe76 DS |
310 | static int |
311 | pim_mroute_msg_wrvifwhole (int fd, struct interface *ifp, const char *buf) | |
312 | { | |
313 | const struct ip *ip_hdr = (const struct ip *)buf; | |
314 | struct pim_interface *pim_ifp; | |
315 | struct pim_ifchannel *ch; | |
316 | struct pim_upstream *up; | |
317 | struct prefix_sg sg; | |
5f6f65b1 | 318 | struct channel_oil *oil; |
08e1fe76 DS |
319 | |
320 | memset (&sg, 0, sizeof (struct prefix_sg)); | |
321 | sg.src = ip_hdr->ip_src; | |
322 | sg.grp = ip_hdr->ip_dst; | |
323 | ||
324 | if (PIM_DEBUG_MROUTE) | |
325 | zlog_debug ("Received WHOLEPKT Wrong Vif for %s on %s", | |
326 | pim_str_sg_dump (&sg), ifp->name); | |
327 | ||
328 | ch = pim_ifchannel_find(ifp, &sg); | |
329 | if (ch) | |
330 | { | |
331 | if (PIM_DEBUG_MROUTE) | |
332 | zlog_debug ("WRVIFWHOLE (S,G)=%s found ifchannel on interface %s", | |
333 | pim_str_sg_dump (&sg), ifp->name); | |
334 | return -1; | |
335 | } | |
336 | ||
337 | if (PIM_DEBUG_MROUTE) | |
338 | zlog_debug ("If channel: %p", ch); | |
339 | ||
8e38a2cf DS |
340 | up = pim_upstream_find (&sg); |
341 | if (up) | |
342 | { | |
9244dd13 DS |
343 | struct pim_nexthop source; |
344 | struct pim_rpf *rpf = RP (sg.grp); | |
345 | if (!rpf || !rpf->source_nexthop.interface) | |
346 | return 0; | |
347 | ||
348 | pim_ifp = rpf->source_nexthop.interface->info; | |
349 | ||
350 | memset (&source, 0, sizeof (source)); | |
7fe1f662 DS |
351 | /* |
352 | * If we are the fhr that means we are getting a callback during | |
353 | * the pimreg period, so I believe we can ignore this packet | |
354 | */ | |
0bf27c5c | 355 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
7fe1f662 | 356 | { |
7fe1f662 | 357 | //No if channel, but upstream we are at the RP. |
88d6652e DS |
358 | if (pim_nexthop_lookup (&source, up->upstream_register, 0) == 0) |
359 | pim_register_stop_send(source.interface, &sg, pim_ifp->primary_address, up->upstream_register); | |
51e82833 DS |
360 | if (!up->channel_oil) |
361 | up->channel_oil = pim_channel_oil_add (&sg, pim_ifp->mroute_vif_index); | |
5b668dd7 | 362 | pim_upstream_inherited_olist (up); |
51e82833 DS |
363 | if (!up->channel_oil->installed) |
364 | pim_mroute_add (up->channel_oil); | |
3a66b17b | 365 | pim_upstream_set_sptbit (up, ifp); |
7fe1f662 | 366 | } |
5b668dd7 DS |
367 | else |
368 | { | |
9244dd13 DS |
369 | if (I_am_RP (up->sg.grp)) |
370 | { | |
371 | if (pim_nexthop_lookup (&source, up->upstream_register, 0) == 0) | |
372 | pim_register_stop_send(source.interface, &sg, pim_ifp->primary_address, up->upstream_register); | |
373 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
374 | } | |
5b668dd7 DS |
375 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); |
376 | pim_upstream_inherited_olist (up); | |
377 | pim_mroute_msg_wholepkt (fd, ifp, buf); | |
378 | } | |
379 | return 0; | |
8e38a2cf DS |
380 | } |
381 | ||
5f6f65b1 DS |
382 | pim_ifp = ifp->info; |
383 | oil = pim_channel_oil_add (&sg, pim_ifp->mroute_vif_index); | |
384 | if (!oil->installed) | |
385 | pim_mroute_add (oil); | |
386 | if (pim_if_connected_to_source (ifp, sg.src)) | |
08e1fe76 | 387 | { |
e5905a3b | 388 | up = pim_upstream_add (&sg, ifp, PIM_UPSTREAM_FLAG_MASK_FHR, __PRETTY_FUNCTION__); |
5f6f65b1 DS |
389 | if (!up) |
390 | { | |
391 | if (PIM_DEBUG_MROUTE) | |
392 | zlog_debug ("%s: WRONGVIF%s unable to create upstream on interface", | |
393 | pim_str_sg_dump (&sg), ifp->name); | |
394 | return -2; | |
395 | } | |
a9b59879 | 396 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); |
3c72d654 | 397 | pim_upstream_set_created_by_upstream(up); |
08e1fe76 | 398 | |
5f6f65b1 DS |
399 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); |
400 | up->channel_oil = oil; | |
401 | up->channel_oil->cc.pktcnt++; | |
402 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
403 | up->join_state = PIM_UPSTREAM_JOINED; | |
404 | pim_upstream_inherited_olist (up); | |
08e1fe76 | 405 | |
5f6f65b1 DS |
406 | // Send the packet to the RP |
407 | pim_mroute_msg_wholepkt (fd, ifp, buf); | |
408 | } | |
08e1fe76 DS |
409 | |
410 | return 0; | |
411 | } | |
412 | ||
e355e30f DS |
413 | int pim_mroute_msg(int fd, const char *buf, int buf_size) |
414 | { | |
415 | struct interface *ifp; | |
b05b72e8 | 416 | struct pim_interface *pim_ifp; |
e355e30f DS |
417 | const struct ip *ip_hdr; |
418 | const struct igmpmsg *msg; | |
eaa54bdb DW |
419 | char ip_src_str[INET_ADDRSTRLEN] = ""; |
420 | char ip_dst_str[INET_ADDRSTRLEN] = ""; | |
421 | char src_str[INET_ADDRSTRLEN] = "<src?>"; | |
422 | char grp_str[INET_ADDRSTRLEN] = "<grp?>"; | |
b05b72e8 DW |
423 | struct in_addr ifaddr; |
424 | struct igmp_sock *igmp; | |
12e41d03 | 425 | |
e355e30f DS |
426 | ip_hdr = (const struct ip *) buf; |
427 | ||
b05b72e8 DW |
428 | if (ip_hdr->ip_p == IPPROTO_IGMP) { |
429 | ||
430 | /* We have the IP packet but we do not know which interface this packet was | |
431 | * received on. Find the interface that is on the same subnet as the source | |
432 | * of the IP packet. | |
433 | */ | |
9f0edbc9 | 434 | ifp = pim_if_lookup_address_vrf (ip_hdr->ip_src, VRF_DEFAULT); |
b05b72e8 DW |
435 | |
436 | if (!ifp) { | |
437 | if (PIM_DEBUG_MROUTE_DETAIL) { | |
438 | pim_inet4_dump("<src?>", ip_hdr->ip_src, ip_src_str, sizeof(ip_src_str)); | |
439 | pim_inet4_dump("<dst?>", ip_hdr->ip_dst, ip_dst_str, sizeof(ip_dst_str)); | |
440 | ||
9f0edbc9 | 441 | zlog_warn("%s: igmp kernel upcall could not find usable interface for %s -> %s", |
b05b72e8 DW |
442 | __PRETTY_FUNCTION__, |
443 | ip_src_str, | |
444 | ip_dst_str); | |
445 | } | |
446 | return 0; | |
447 | } | |
b05b72e8 DW |
448 | pim_ifp = ifp->info; |
449 | ifaddr = pim_find_primary_addr(ifp); | |
450 | igmp = pim_igmp_sock_lookup_ifaddr(pim_ifp->igmp_socket_list, ifaddr); | |
451 | ||
02e5bd72 | 452 | if (PIM_DEBUG_MROUTE) { |
b05b72e8 DW |
453 | pim_inet4_dump("<src?>", ip_hdr->ip_src, ip_src_str, sizeof(ip_src_str)); |
454 | pim_inet4_dump("<dst?>", ip_hdr->ip_dst, ip_dst_str, sizeof(ip_dst_str)); | |
455 | ||
02e5bd72 DS |
456 | zlog_warn("%s: igmp kernel upcall on %s(%p) for %s -> %s", |
457 | __PRETTY_FUNCTION__, ifp->name, igmp, ip_src_str, ip_dst_str); | |
b05b72e8 | 458 | } |
02e5bd72 DS |
459 | if (igmp) |
460 | pim_igmp_packet(igmp, (char *)buf, buf_size); | |
b05b72e8 DW |
461 | |
462 | } else if (ip_hdr->ip_p) { | |
6c7197b1 | 463 | if (PIM_DEBUG_MROUTE_DETAIL) { |
e5d33c83 DS |
464 | pim_inet4_dump("<src?>", ip_hdr->ip_src, src_str, sizeof(src_str)); |
465 | pim_inet4_dump("<grp?>", ip_hdr->ip_dst, grp_str, sizeof(grp_str)); | |
b05b72e8 DW |
466 | zlog_debug("%s: no kernel upcall proto=%d src: %s dst: %s msg_size=%d", |
467 | __PRETTY_FUNCTION__, ip_hdr->ip_p, src_str, grp_str, buf_size); | |
e355e30f | 468 | } |
e355e30f | 469 | |
b05b72e8 DW |
470 | } else { |
471 | msg = (const struct igmpmsg *) buf; | |
e355e30f | 472 | |
b05b72e8 | 473 | ifp = pim_if_find_by_vif_index(msg->im_vif); |
e355e30f | 474 | |
b05b72e8 DW |
475 | if (PIM_DEBUG_MROUTE) { |
476 | pim_inet4_dump("<src?>", msg->im_src, src_str, sizeof(src_str)); | |
477 | pim_inet4_dump("<grp?>", msg->im_dst, grp_str, sizeof(grp_str)); | |
478 | zlog_warn("%s: pim kernel upcall %s type=%d ip_p=%d from fd=%d for (S,G)=(%s,%s) on %s vifi=%d size=%d", | |
479 | __PRETTY_FUNCTION__, | |
480 | igmpmsgtype2str[msg->im_msgtype], | |
481 | msg->im_msgtype, | |
482 | ip_hdr->ip_p, | |
483 | fd, | |
484 | src_str, | |
485 | grp_str, | |
486 | ifp->name, | |
487 | msg->im_vif, buf_size); | |
488 | } | |
e355e30f | 489 | |
b05b72e8 DW |
490 | switch (msg->im_msgtype) { |
491 | case IGMPMSG_WRONGVIF: | |
492 | return pim_mroute_msg_wrongvif(fd, ifp, msg); | |
493 | break; | |
494 | case IGMPMSG_NOCACHE: | |
495 | return pim_mroute_msg_nocache(fd, ifp, msg); | |
496 | break; | |
497 | case IGMPMSG_WHOLEPKT: | |
498 | return pim_mroute_msg_wholepkt(fd, ifp, (const char *)msg); | |
499 | break; | |
500 | case IGMPMSG_WRVIFWHOLE: | |
501 | return pim_mroute_msg_wrvifwhole (fd, ifp, (const char *)msg); | |
502 | break; | |
503 | default: | |
504 | break; | |
505 | } | |
e355e30f | 506 | } |
12e41d03 DL |
507 | |
508 | return 0; | |
509 | } | |
510 | ||
511 | static int mroute_read_msg(int fd) | |
512 | { | |
eab2a327 | 513 | char buf[10000]; |
12e41d03 DL |
514 | int rd; |
515 | ||
12e41d03 DL |
516 | rd = read(fd, buf, sizeof(buf)); |
517 | if (rd < 0) { | |
518 | zlog_warn("%s: failure reading fd=%d: errno=%d: %s", | |
519 | __PRETTY_FUNCTION__, fd, errno, safe_strerror(errno)); | |
f0ce50d4 | 520 | return -1; |
12e41d03 DL |
521 | } |
522 | ||
523 | return pim_mroute_msg(fd, buf, rd); | |
524 | } | |
525 | ||
526 | static int mroute_read(struct thread *t) | |
527 | { | |
528 | int fd; | |
529 | int result; | |
530 | ||
12e41d03 DL |
531 | |
532 | fd = THREAD_FD(t); | |
12e41d03 DL |
533 | |
534 | result = mroute_read_msg(fd); | |
535 | ||
536 | /* Keep reading */ | |
537 | qpim_mroute_socket_reader = 0; | |
538 | mroute_read_on(); | |
539 | ||
540 | return result; | |
541 | } | |
542 | ||
543 | static void mroute_read_on() | |
544 | { | |
545 | zassert(!qpim_mroute_socket_reader); | |
546 | zassert(PIM_MROUTE_IS_ENABLED); | |
547 | ||
548 | THREAD_READ_ON(master, qpim_mroute_socket_reader, | |
549 | mroute_read, 0, qpim_mroute_socket_fd); | |
550 | } | |
551 | ||
552 | static void mroute_read_off() | |
553 | { | |
554 | THREAD_OFF(qpim_mroute_socket_reader); | |
555 | } | |
556 | ||
557 | int pim_mroute_socket_enable() | |
558 | { | |
559 | int fd; | |
560 | ||
561 | if (PIM_MROUTE_IS_ENABLED) | |
562 | return -1; | |
563 | ||
564 | if ( pimd_privs.change (ZPRIVS_RAISE) ) | |
565 | zlog_err ("pim_mroute_socket_enable: could not raise privs, %s", | |
566 | safe_strerror (errno) ); | |
567 | ||
568 | fd = socket(AF_INET, SOCK_RAW, IPPROTO_IGMP); | |
569 | ||
570 | if ( pimd_privs.change (ZPRIVS_LOWER) ) | |
571 | zlog_err ("pim_mroute_socket_enable: could not lower privs, %s", | |
572 | safe_strerror (errno) ); | |
573 | ||
574 | if (fd < 0) { | |
575 | zlog_warn("Could not create mroute socket: errno=%d: %s", | |
576 | errno, safe_strerror(errno)); | |
577 | return -2; | |
578 | } | |
579 | ||
580 | if (pim_mroute_set(fd, 1)) { | |
581 | zlog_warn("Could not enable mroute on socket fd=%d: errno=%d: %s", | |
582 | fd, errno, safe_strerror(errno)); | |
583 | close(fd); | |
584 | return -3; | |
585 | } | |
586 | ||
587 | qpim_mroute_socket_fd = fd; | |
b45cefcb | 588 | |
12e41d03 DL |
589 | qpim_mroute_socket_creation = pim_time_monotonic_sec(); |
590 | mroute_read_on(); | |
591 | ||
12e41d03 DL |
592 | return 0; |
593 | } | |
594 | ||
595 | int pim_mroute_socket_disable() | |
596 | { | |
597 | if (PIM_MROUTE_IS_DISABLED) | |
598 | return -1; | |
599 | ||
600 | if (pim_mroute_set(qpim_mroute_socket_fd, 0)) { | |
601 | zlog_warn("Could not disable mroute on socket fd=%d: errno=%d: %s", | |
602 | qpim_mroute_socket_fd, errno, safe_strerror(errno)); | |
603 | return -2; | |
604 | } | |
605 | ||
606 | if (close(qpim_mroute_socket_fd)) { | |
607 | zlog_warn("Failure closing mroute socket: fd=%d errno=%d: %s", | |
608 | qpim_mroute_socket_fd, errno, safe_strerror(errno)); | |
609 | return -3; | |
610 | } | |
611 | ||
612 | mroute_read_off(); | |
613 | qpim_mroute_socket_fd = -1; | |
614 | ||
12e41d03 DL |
615 | return 0; |
616 | } | |
617 | ||
618 | /* | |
619 | For each network interface (e.g., physical or a virtual tunnel) that | |
620 | would be used for multicast forwarding, a corresponding multicast | |
621 | interface must be added to the kernel. | |
622 | */ | |
744d91b3 | 623 | int pim_mroute_add_vif(struct interface *ifp, struct in_addr ifaddr, unsigned char flags) |
12e41d03 | 624 | { |
744d91b3 | 625 | struct pim_interface *pim_ifp = ifp->info; |
12e41d03 DL |
626 | struct vifctl vc; |
627 | int err; | |
628 | ||
629 | if (PIM_MROUTE_IS_DISABLED) { | |
630 | zlog_warn("%s: global multicast is disabled", | |
631 | __PRETTY_FUNCTION__); | |
632 | return -1; | |
633 | } | |
634 | ||
635 | memset(&vc, 0, sizeof(vc)); | |
744d91b3 | 636 | vc.vifc_vifi = pim_ifp->mroute_vif_index; |
b3f2bf7c | 637 | #ifdef VIFF_USE_IFINDEX |
744d91b3 | 638 | vc.vifc_lcl_ifindex = ifp->ifindex; |
b3f2bf7c RW |
639 | #else |
640 | if (ifaddr.s_addr == INADDR_ANY) { | |
641 | zlog_warn("%s: unnumbered interfaces are not supported on this platform", | |
642 | __PRETTY_FUNCTION__); | |
643 | return -1; | |
644 | } | |
645 | memcpy(&vc.vifc_lcl_addr, &ifaddr, sizeof(vc.vifc_lcl_addr)); | |
646 | #endif | |
b45cefcb | 647 | vc.vifc_flags = flags; |
12e41d03 DL |
648 | vc.vifc_threshold = PIM_MROUTE_MIN_TTL; |
649 | vc.vifc_rate_limit = 0; | |
12e41d03 DL |
650 | |
651 | #ifdef PIM_DVMRP_TUNNEL | |
652 | if (vc.vifc_flags & VIFF_TUNNEL) { | |
653 | memcpy(&vc.vifc_rmt_addr, &vif_remote_addr, sizeof(vc.vifc_rmt_addr)); | |
654 | } | |
655 | #endif | |
656 | ||
b45cefcb | 657 | err = setsockopt(qpim_mroute_socket_fd, IPPROTO_IP, MRT_ADD_VIF, (void*) &vc, sizeof(vc)); |
12e41d03 | 658 | if (err) { |
eaa54bdb | 659 | char ifaddr_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
660 | |
661 | pim_inet4_dump("<ifaddr?>", ifaddr, ifaddr_str, sizeof(ifaddr_str)); | |
662 | ||
59471fb8 | 663 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_ADD_VIF,vif_index=%d,ifaddr=%s,flag=%d): errno=%d: %s", |
12e41d03 | 664 | __FILE__, __PRETTY_FUNCTION__, |
744d91b3 | 665 | qpim_mroute_socket_fd, ifp->ifindex, ifaddr_str, flags, |
3d7765d7 | 666 | errno, safe_strerror(errno)); |
12e41d03 DL |
667 | return -2; |
668 | } | |
669 | ||
670 | return 0; | |
671 | } | |
672 | ||
673 | int pim_mroute_del_vif(int vif_index) | |
674 | { | |
675 | struct vifctl vc; | |
676 | int err; | |
677 | ||
678 | if (PIM_MROUTE_IS_DISABLED) { | |
679 | zlog_warn("%s: global multicast is disabled", | |
680 | __PRETTY_FUNCTION__); | |
681 | return -1; | |
682 | } | |
683 | ||
684 | memset(&vc, 0, sizeof(vc)); | |
685 | vc.vifc_vifi = vif_index; | |
686 | ||
687 | err = setsockopt(qpim_mroute_socket_fd, IPPROTO_IP, MRT_DEL_VIF, (void*) &vc, sizeof(vc)); | |
688 | if (err) { | |
12e41d03 DL |
689 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_DEL_VIF,vif_index=%d): errno=%d: %s", |
690 | __FILE__, __PRETTY_FUNCTION__, | |
691 | qpim_mroute_socket_fd, vif_index, | |
3d7765d7 | 692 | errno, safe_strerror(errno)); |
12e41d03 DL |
693 | return -2; |
694 | } | |
695 | ||
696 | return 0; | |
697 | } | |
698 | ||
c171d6d8 | 699 | int pim_mroute_add(struct channel_oil *c_oil) |
12e41d03 DL |
700 | { |
701 | int err; | |
2ca35b3d | 702 | int orig = 0; |
0365f56b | 703 | int orig_iif_vif = 0; |
12e41d03 DL |
704 | |
705 | qpim_mroute_add_last = pim_time_monotonic_sec(); | |
706 | ++qpim_mroute_add_events; | |
707 | ||
708 | if (PIM_MROUTE_IS_DISABLED) { | |
709 | zlog_warn("%s: global multicast is disabled", | |
710 | __PRETTY_FUNCTION__); | |
711 | return -1; | |
712 | } | |
713 | ||
d3aded99 DS |
714 | /* The linux kernel *expects* the incoming |
715 | * vif to be part of the outgoing list | |
716 | * in the case of a (*,G). | |
717 | */ | |
c171d6d8 | 718 | if (c_oil->oil.mfcc_origin.s_addr == INADDR_ANY) |
d3aded99 | 719 | { |
c171d6d8 DS |
720 | orig = c_oil->oil.mfcc_ttls[c_oil->oil.mfcc_parent]; |
721 | c_oil->oil.mfcc_ttls[c_oil->oil.mfcc_parent] = 1; | |
d3aded99 DS |
722 | } |
723 | ||
0365f56b DS |
724 | /* |
725 | * If we have an unresolved cache entry for the S,G | |
726 | * it is owned by the pimreg for the incoming IIF | |
727 | * So set pimreg as the IIF temporarily to cause | |
728 | * the packets to be forwarded. Then set it | |
729 | * to the correct IIF afterwords. | |
730 | */ | |
731 | if (!c_oil->installed && c_oil->oil.mfcc_origin.s_addr != INADDR_ANY && | |
732 | c_oil->oil.mfcc_parent != 0) | |
733 | { | |
734 | orig_iif_vif = c_oil->oil.mfcc_parent; | |
735 | c_oil->oil.mfcc_parent = 0; | |
736 | } | |
12e41d03 | 737 | err = setsockopt(qpim_mroute_socket_fd, IPPROTO_IP, MRT_ADD_MFC, |
c171d6d8 | 738 | &c_oil->oil, sizeof(c_oil->oil)); |
d3aded99 | 739 | |
0365f56b DS |
740 | if (!err && !c_oil->installed && c_oil->oil.mfcc_origin.s_addr != INADDR_ANY && |
741 | orig_iif_vif != 0) | |
742 | { | |
743 | c_oil->oil.mfcc_parent = orig_iif_vif; | |
744 | err = setsockopt (qpim_mroute_socket_fd, IPPROTO_IP, MRT_ADD_MFC, | |
745 | &c_oil->oil, sizeof (c_oil->oil)); | |
746 | } | |
747 | ||
c171d6d8 DS |
748 | if (c_oil->oil.mfcc_origin.s_addr == INADDR_ANY) |
749 | c_oil->oil.mfcc_ttls[c_oil->oil.mfcc_parent] = orig; | |
d3aded99 | 750 | |
12e41d03 | 751 | if (err) { |
12e41d03 DL |
752 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_ADD_MFC): errno=%d: %s", |
753 | __FILE__, __PRETTY_FUNCTION__, | |
754 | qpim_mroute_socket_fd, | |
3d7765d7 | 755 | errno, safe_strerror(errno)); |
12e41d03 DL |
756 | return -2; |
757 | } | |
758 | ||
58302dc7 | 759 | c_oil->installed = 1; |
12e41d03 DL |
760 | return 0; |
761 | } | |
762 | ||
c171d6d8 | 763 | int pim_mroute_del (struct channel_oil *c_oil) |
12e41d03 DL |
764 | { |
765 | int err; | |
766 | ||
767 | qpim_mroute_del_last = pim_time_monotonic_sec(); | |
768 | ++qpim_mroute_del_events; | |
769 | ||
770 | if (PIM_MROUTE_IS_DISABLED) { | |
771 | zlog_warn("%s: global multicast is disabled", | |
772 | __PRETTY_FUNCTION__); | |
773 | return -1; | |
774 | } | |
775 | ||
c171d6d8 | 776 | err = setsockopt(qpim_mroute_socket_fd, IPPROTO_IP, MRT_DEL_MFC, &c_oil->oil, sizeof(c_oil->oil)); |
12e41d03 | 777 | if (err) { |
05ca4827 DS |
778 | if (PIM_DEBUG_MROUTE) |
779 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_DEL_MFC): errno=%d: %s", | |
780 | __FILE__, __PRETTY_FUNCTION__, | |
781 | qpim_mroute_socket_fd, | |
782 | errno, safe_strerror(errno)); | |
12e41d03 DL |
783 | return -2; |
784 | } | |
785 | ||
58302dc7 DS |
786 | c_oil->installed = 0; |
787 | ||
12e41d03 DL |
788 | return 0; |
789 | } | |
3667e8a0 DS |
790 | |
791 | void | |
792 | pim_mroute_update_counters (struct channel_oil *c_oil) | |
793 | { | |
794 | struct sioc_sg_req sgreq; | |
795 | ||
3667e8a0 DS |
796 | c_oil->cc.oldpktcnt = c_oil->cc.pktcnt; |
797 | c_oil->cc.oldbytecnt = c_oil->cc.bytecnt; | |
798 | c_oil->cc.oldwrong_if = c_oil->cc.wrong_if; | |
799 | ||
c7b1183f DS |
800 | if (!c_oil->installed) |
801 | { | |
802 | c_oil->cc.lastused = 100 * qpim_keep_alive_time; | |
803 | if (PIM_DEBUG_MROUTE) | |
804 | { | |
805 | struct prefix_sg sg; | |
806 | ||
807 | sg.src = c_oil->oil.mfcc_origin; | |
808 | sg.grp = c_oil->oil.mfcc_mcastgrp; | |
809 | if (PIM_DEBUG_MROUTE) | |
810 | zlog_debug("Channel(%s) is not installed no need to collect data from kernel", | |
811 | pim_str_sg_dump (&sg)); | |
812 | } | |
813 | return; | |
814 | } | |
815 | ||
816 | memset (&sgreq, 0, sizeof(sgreq)); | |
817 | sgreq.src = c_oil->oil.mfcc_origin; | |
818 | sgreq.grp = c_oil->oil.mfcc_mcastgrp; | |
819 | ||
51e82833 | 820 | pim_zlookup_sg_statistics (c_oil); |
3667e8a0 DS |
821 | if (ioctl (qpim_mroute_socket_fd, SIOCGETSGCNT, &sgreq)) |
822 | { | |
c7b1183f DS |
823 | if (PIM_DEBUG_MROUTE) |
824 | { | |
825 | struct prefix_sg sg; | |
826 | ||
827 | sg.src = c_oil->oil.mfcc_origin; | |
828 | sg.grp = c_oil->oil.mfcc_mcastgrp; | |
829 | ||
830 | zlog_warn ("ioctl(SIOCGETSGCNT=%lu) failure for (S,G)=(%s): errno=%d: %s", | |
831 | (unsigned long)SIOCGETSGCNT, | |
832 | pim_str_sg_dump (&sg), | |
833 | errno, | |
834 | safe_strerror(errno)); | |
835 | } | |
3667e8a0 DS |
836 | return; |
837 | } | |
838 | ||
839 | c_oil->cc.pktcnt = sgreq.pktcnt; | |
840 | c_oil->cc.bytecnt = sgreq.bytecnt; | |
841 | c_oil->cc.wrong_if = sgreq.wrong_if; | |
842 | ||
843 | return; | |
844 | } |