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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 DS |
105 | (pim_ifp->itype == PIM_INTERFACE_SSM)) |
106 | return 0; | |
107 | ||
065bee4b DS |
108 | /* |
109 | * If we've received a multicast packet that isn't connected to | |
110 | * us | |
111 | */ | |
3565202d | 112 | if (!pim_if_connected_to_source (ifp, msg->im_src)) |
065bee4b | 113 | { |
6c7197b1 | 114 | if (PIM_DEBUG_MROUTE_DETAIL) |
8f547471 | 115 | zlog_debug ("%s: Received incoming packet that doesn't originate on our seg", |
065bee4b DS |
116 | __PRETTY_FUNCTION__); |
117 | return 0; | |
118 | } | |
119 | ||
4ed0af70 DS |
120 | memset (&sg, 0, sizeof (struct prefix_sg)); |
121 | sg.src = msg->im_src; | |
122 | sg.grp = msg->im_dst; | |
c29a5806 DS |
123 | |
124 | if (PIM_DEBUG_MROUTE) { | |
125 | zlog_debug("%s: Adding a Route %s for WHOLEPKT consumption", | |
126 | __PRETTY_FUNCTION__, pim_str_sg_dump (&sg)); | |
127 | } | |
128 | ||
5f6f65b1 DS |
129 | oil = pim_channel_oil_add (&sg, pim_ifp->mroute_vif_index); |
130 | if (!oil) { | |
630f76b6 | 131 | if (PIM_DEBUG_MROUTE) { |
5f6f65b1 | 132 | zlog_debug("%s: Failure to add channel oil for %s", |
59471fb8 | 133 | __PRETTY_FUNCTION__, |
5074a423 | 134 | pim_str_sg_dump (&sg)); |
59471fb8 DS |
135 | } |
136 | return 0; | |
137 | } | |
138 | ||
e5905a3b | 139 | up = pim_upstream_add (&sg, ifp, PIM_UPSTREAM_FLAG_MASK_FHR, __PRETTY_FUNCTION__); |
5f6f65b1 | 140 | if (!up) { |
630f76b6 | 141 | if (PIM_DEBUG_MROUTE) { |
5f6f65b1 | 142 | zlog_debug("%s: Failure to add upstream information for %s", |
59471fb8 | 143 | __PRETTY_FUNCTION__, |
c29a5806 | 144 | pim_str_sg_dump (&sg)); |
59471fb8 DS |
145 | } |
146 | return 0; | |
147 | } | |
a9b59879 | 148 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); |
5ce79466 | 149 | PIM_UPSTREAM_FLAG_SET_CREATED_BY_UPSTREAM(up->flags); |
5f6f65b1 DS |
150 | |
151 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); | |
152 | ||
153 | up->channel_oil = oil; | |
25a335e0 | 154 | up->channel_oil->cc.pktcnt++; |
0bf27c5c | 155 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); |
8a294fa2 | 156 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); |
56638739 | 157 | up->join_state = PIM_UPSTREAM_JOINED; |
59471fb8 | 158 | |
e355e30f DS |
159 | return 0; |
160 | } | |
12e41d03 | 161 | |
e355e30f | 162 | static int |
c29a5806 | 163 | pim_mroute_msg_wholepkt (int fd, struct interface *ifp, const char *buf) |
e355e30f | 164 | { |
59471fb8 | 165 | struct pim_interface *pim_ifp; |
4ed0af70 | 166 | struct prefix_sg sg; |
ed66602c | 167 | struct pim_rpf *rpg; |
c8ae3ce8 | 168 | const struct ip *ip_hdr; |
59471fb8 | 169 | struct pim_upstream *up; |
04b40f02 | 170 | |
c8ae3ce8 DS |
171 | ip_hdr = (const struct ip *)buf; |
172 | ||
4ed0af70 DS |
173 | memset (&sg, 0, sizeof (struct prefix_sg)); |
174 | sg.src = ip_hdr->ip_src; | |
175 | sg.grp = ip_hdr->ip_dst; | |
c8ae3ce8 | 176 | |
5074a423 | 177 | up = pim_upstream_find(&sg); |
59471fb8 | 178 | if (!up) { |
6c7197b1 | 179 | if (PIM_DEBUG_MROUTE_DETAIL) { |
5074a423 DS |
180 | zlog_debug("%s: Unable to find upstream channel WHOLEPKT%s", |
181 | __PRETTY_FUNCTION__, pim_str_sg_dump (&sg)); | |
59471fb8 DS |
182 | } |
183 | return 0; | |
184 | } | |
185 | ||
998af219 DS |
186 | pim_ifp = up->rpf.source_nexthop.interface->info; |
187 | ||
4ed0af70 | 188 | rpg = RP(sg.grp); |
c8ae3ce8 | 189 | |
63c59d0c | 190 | if ((pim_rpf_addr_is_inaddr_none (rpg)) || |
c8ae3ce8 | 191 | (!pim_ifp) || |
b45fd505 | 192 | (!(PIM_I_am_DR(pim_ifp))) || |
c8ae3ce8 | 193 | (pim_ifp->itype == PIM_INTERFACE_SSM)) { |
630f76b6 | 194 | if (PIM_DEBUG_MROUTE) { |
998af219 DS |
195 | zlog_debug("%s: Failed Check send packet", __PRETTY_FUNCTION__); |
196 | } | |
c8ae3ce8 | 197 | return 0; |
04b40f02 | 198 | } |
84366c7e | 199 | |
2ddab288 DS |
200 | /* |
201 | * If we've received a register suppress | |
202 | */ | |
203 | if (!up->t_rs_timer) | |
4df01a4e DS |
204 | pim_register_send((uint8_t *)buf + sizeof(struct ip), ntohs (ip_hdr->ip_len), |
205 | pim_ifp->primary_address, rpg, 0); | |
2ddab288 | 206 | |
e355e30f DS |
207 | return 0; |
208 | } | |
12e41d03 | 209 | |
e355e30f | 210 | static int |
c29a5806 | 211 | pim_mroute_msg_wrongvif (int fd, struct interface *ifp, const struct igmpmsg *msg) |
e355e30f DS |
212 | { |
213 | struct pim_ifchannel *ch; | |
214 | struct pim_interface *pim_ifp; | |
4ed0af70 | 215 | struct prefix_sg sg; |
12e41d03 | 216 | |
c29a5806 DS |
217 | memset (&sg, 0, sizeof (struct prefix_sg)); |
218 | sg.src = msg->im_src; | |
219 | sg.grp = msg->im_dst; | |
220 | ||
e355e30f DS |
221 | /* |
222 | Send Assert(S,G) on iif as response to WRONGVIF kernel upcall. | |
12e41d03 | 223 | |
e355e30f DS |
224 | RFC 4601 4.8.2. PIM-SSM-Only Routers |
225 | ||
226 | iif is the incoming interface of the packet. | |
227 | if (iif is in inherited_olist(S,G)) { | |
228 | send Assert(S,G) on iif | |
229 | } | |
230 | */ | |
12e41d03 | 231 | |
e355e30f | 232 | if (!ifp) { |
630f76b6 | 233 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 234 | zlog_debug("%s: WRONGVIF (S,G)=%s could not find input interface for input_vif_index=%d", |
12e41d03 | 235 | __PRETTY_FUNCTION__, |
c29a5806 | 236 | pim_str_sg_dump (&sg), msg->im_vif); |
12e41d03 | 237 | } |
e355e30f DS |
238 | return -1; |
239 | } | |
12e41d03 | 240 | |
e355e30f DS |
241 | pim_ifp = ifp->info; |
242 | if (!pim_ifp) { | |
630f76b6 | 243 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 244 | zlog_debug("%s: WRONGVIF (S,G)=%s multicast not enabled on interface %s", |
e355e30f | 245 | __PRETTY_FUNCTION__, |
c29a5806 | 246 | pim_str_sg_dump (&sg), ifp->name); |
12e41d03 | 247 | } |
e355e30f DS |
248 | return -2; |
249 | } | |
12e41d03 | 250 | |
5074a423 | 251 | ch = pim_ifchannel_find(ifp, &sg); |
e355e30f | 252 | if (!ch) { |
630f76b6 | 253 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 254 | zlog_debug("%s: WRONGVIF (S,G)=%s could not find channel on interface %s", |
e355e30f | 255 | __PRETTY_FUNCTION__, |
c29a5806 | 256 | pim_str_sg_dump (&sg), ifp->name); |
12e41d03 | 257 | } |
e355e30f DS |
258 | return -3; |
259 | } | |
12e41d03 | 260 | |
e355e30f DS |
261 | /* |
262 | RFC 4601: 4.6.1. (S,G) Assert Message State Machine | |
263 | ||
264 | Transitions from NoInfo State | |
265 | ||
266 | An (S,G) data packet arrives on interface I, AND | |
267 | CouldAssert(S,G,I)==TRUE An (S,G) data packet arrived on an | |
268 | downstream interface that is in our (S,G) outgoing interface | |
269 | list. We optimistically assume that we will be the assert | |
270 | winner for this (S,G), and so we transition to the "I am Assert | |
271 | Winner" state and perform Actions A1 (below), which will | |
272 | initiate the assert negotiation for (S,G). | |
273 | */ | |
12e41d03 | 274 | |
e355e30f | 275 | if (ch->ifassert_state != PIM_IFASSERT_NOINFO) { |
630f76b6 | 276 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 277 | zlog_debug("%s: WRONGVIF (S,G)=%s channel is not on Assert NoInfo state for interface %s", |
e355e30f | 278 | __PRETTY_FUNCTION__, |
c29a5806 | 279 | pim_str_sg_dump (&sg), ifp->name); |
12e41d03 | 280 | } |
e355e30f DS |
281 | return -4; |
282 | } | |
12e41d03 | 283 | |
e355e30f | 284 | if (!PIM_IF_FLAG_TEST_COULD_ASSERT(ch->flags)) { |
630f76b6 | 285 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 286 | zlog_debug("%s: WRONGVIF (S,G)=%s interface %s is not downstream for channel", |
e355e30f | 287 | __PRETTY_FUNCTION__, |
c29a5806 | 288 | pim_str_sg_dump (&sg), ifp->name); |
12e41d03 | 289 | } |
e355e30f DS |
290 | return -5; |
291 | } | |
12e41d03 | 292 | |
e355e30f | 293 | if (assert_action_a1(ch)) { |
630f76b6 | 294 | if (PIM_DEBUG_MROUTE) { |
c29a5806 | 295 | zlog_debug("%s: WRONGVIF (S,G)=%s assert_action_a1 failure on interface %s", |
e355e30f | 296 | __PRETTY_FUNCTION__, |
c29a5806 | 297 | pim_str_sg_dump (&sg), ifp->name); |
12e41d03 | 298 | } |
e355e30f DS |
299 | return -6; |
300 | } | |
301 | ||
302 | return 0; | |
303 | } | |
304 | ||
08e1fe76 DS |
305 | static int |
306 | pim_mroute_msg_wrvifwhole (int fd, struct interface *ifp, const char *buf) | |
307 | { | |
308 | const struct ip *ip_hdr = (const struct ip *)buf; | |
309 | struct pim_interface *pim_ifp; | |
310 | struct pim_ifchannel *ch; | |
311 | struct pim_upstream *up; | |
312 | struct prefix_sg sg; | |
5f6f65b1 | 313 | struct channel_oil *oil; |
08e1fe76 DS |
314 | |
315 | memset (&sg, 0, sizeof (struct prefix_sg)); | |
316 | sg.src = ip_hdr->ip_src; | |
317 | sg.grp = ip_hdr->ip_dst; | |
318 | ||
319 | if (PIM_DEBUG_MROUTE) | |
320 | zlog_debug ("Received WHOLEPKT Wrong Vif for %s on %s", | |
321 | pim_str_sg_dump (&sg), ifp->name); | |
322 | ||
323 | ch = pim_ifchannel_find(ifp, &sg); | |
324 | if (ch) | |
325 | { | |
326 | if (PIM_DEBUG_MROUTE) | |
327 | zlog_debug ("WRVIFWHOLE (S,G)=%s found ifchannel on interface %s", | |
328 | pim_str_sg_dump (&sg), ifp->name); | |
329 | return -1; | |
330 | } | |
331 | ||
332 | if (PIM_DEBUG_MROUTE) | |
333 | zlog_debug ("If channel: %p", ch); | |
334 | ||
8e38a2cf DS |
335 | up = pim_upstream_find (&sg); |
336 | if (up) | |
337 | { | |
9244dd13 DS |
338 | struct pim_nexthop source; |
339 | struct pim_rpf *rpf = RP (sg.grp); | |
340 | if (!rpf || !rpf->source_nexthop.interface) | |
341 | return 0; | |
342 | ||
343 | pim_ifp = rpf->source_nexthop.interface->info; | |
344 | ||
345 | memset (&source, 0, sizeof (source)); | |
7fe1f662 DS |
346 | /* |
347 | * If we are the fhr that means we are getting a callback during | |
348 | * the pimreg period, so I believe we can ignore this packet | |
349 | */ | |
0bf27c5c | 350 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
7fe1f662 | 351 | { |
7fe1f662 | 352 | //No if channel, but upstream we are at the RP. |
88d6652e DS |
353 | if (pim_nexthop_lookup (&source, up->upstream_register, 0) == 0) |
354 | pim_register_stop_send(source.interface, &sg, pim_ifp->primary_address, up->upstream_register); | |
51e82833 DS |
355 | if (!up->channel_oil) |
356 | up->channel_oil = pim_channel_oil_add (&sg, pim_ifp->mroute_vif_index); | |
5b668dd7 | 357 | pim_upstream_inherited_olist (up); |
51e82833 DS |
358 | if (!up->channel_oil->installed) |
359 | pim_mroute_add (up->channel_oil); | |
3a66b17b | 360 | pim_upstream_set_sptbit (up, ifp); |
7fe1f662 | 361 | } |
5b668dd7 DS |
362 | else |
363 | { | |
9244dd13 DS |
364 | if (I_am_RP (up->sg.grp)) |
365 | { | |
366 | if (pim_nexthop_lookup (&source, up->upstream_register, 0) == 0) | |
367 | pim_register_stop_send(source.interface, &sg, pim_ifp->primary_address, up->upstream_register); | |
368 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
369 | } | |
5b668dd7 DS |
370 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); |
371 | pim_upstream_inherited_olist (up); | |
372 | pim_mroute_msg_wholepkt (fd, ifp, buf); | |
373 | } | |
374 | return 0; | |
8e38a2cf DS |
375 | } |
376 | ||
5f6f65b1 DS |
377 | pim_ifp = ifp->info; |
378 | oil = pim_channel_oil_add (&sg, pim_ifp->mroute_vif_index); | |
379 | if (!oil->installed) | |
380 | pim_mroute_add (oil); | |
381 | if (pim_if_connected_to_source (ifp, sg.src)) | |
08e1fe76 | 382 | { |
e5905a3b | 383 | up = pim_upstream_add (&sg, ifp, PIM_UPSTREAM_FLAG_MASK_FHR, __PRETTY_FUNCTION__); |
5f6f65b1 DS |
384 | if (!up) |
385 | { | |
386 | if (PIM_DEBUG_MROUTE) | |
387 | zlog_debug ("%s: WRONGVIF%s unable to create upstream on interface", | |
388 | pim_str_sg_dump (&sg), ifp->name); | |
389 | return -2; | |
390 | } | |
a9b59879 | 391 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); |
5ce79466 | 392 | PIM_UPSTREAM_FLAG_SET_CREATED_BY_UPSTREAM(up->flags); |
08e1fe76 | 393 | |
5f6f65b1 DS |
394 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); |
395 | up->channel_oil = oil; | |
396 | up->channel_oil->cc.pktcnt++; | |
397 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
398 | up->join_state = PIM_UPSTREAM_JOINED; | |
399 | pim_upstream_inherited_olist (up); | |
08e1fe76 | 400 | |
5f6f65b1 DS |
401 | // Send the packet to the RP |
402 | pim_mroute_msg_wholepkt (fd, ifp, buf); | |
403 | } | |
08e1fe76 DS |
404 | |
405 | return 0; | |
406 | } | |
407 | ||
e355e30f DS |
408 | int pim_mroute_msg(int fd, const char *buf, int buf_size) |
409 | { | |
410 | struct interface *ifp; | |
b05b72e8 | 411 | struct pim_interface *pim_ifp; |
e355e30f DS |
412 | const struct ip *ip_hdr; |
413 | const struct igmpmsg *msg; | |
eaa54bdb DW |
414 | char ip_src_str[INET_ADDRSTRLEN] = ""; |
415 | char ip_dst_str[INET_ADDRSTRLEN] = ""; | |
416 | char src_str[INET_ADDRSTRLEN] = "<src?>"; | |
417 | char grp_str[INET_ADDRSTRLEN] = "<grp?>"; | |
b05b72e8 DW |
418 | struct in_addr ifaddr; |
419 | struct igmp_sock *igmp; | |
12e41d03 | 420 | |
e355e30f DS |
421 | ip_hdr = (const struct ip *) buf; |
422 | ||
b05b72e8 DW |
423 | if (ip_hdr->ip_p == IPPROTO_IGMP) { |
424 | ||
425 | /* We have the IP packet but we do not know which interface this packet was | |
426 | * received on. Find the interface that is on the same subnet as the source | |
427 | * of the IP packet. | |
428 | */ | |
9f0edbc9 | 429 | ifp = pim_if_lookup_address_vrf (ip_hdr->ip_src, VRF_DEFAULT); |
b05b72e8 DW |
430 | |
431 | if (!ifp) { | |
432 | if (PIM_DEBUG_MROUTE_DETAIL) { | |
433 | pim_inet4_dump("<src?>", ip_hdr->ip_src, ip_src_str, sizeof(ip_src_str)); | |
434 | pim_inet4_dump("<dst?>", ip_hdr->ip_dst, ip_dst_str, sizeof(ip_dst_str)); | |
435 | ||
9f0edbc9 | 436 | zlog_warn("%s: igmp kernel upcall could not find usable interface for %s -> %s", |
b05b72e8 DW |
437 | __PRETTY_FUNCTION__, |
438 | ip_src_str, | |
439 | ip_dst_str); | |
440 | } | |
441 | return 0; | |
442 | } | |
b05b72e8 DW |
443 | pim_ifp = ifp->info; |
444 | ifaddr = pim_find_primary_addr(ifp); | |
445 | igmp = pim_igmp_sock_lookup_ifaddr(pim_ifp->igmp_socket_list, ifaddr); | |
446 | ||
02e5bd72 | 447 | if (PIM_DEBUG_MROUTE) { |
b05b72e8 DW |
448 | pim_inet4_dump("<src?>", ip_hdr->ip_src, ip_src_str, sizeof(ip_src_str)); |
449 | pim_inet4_dump("<dst?>", ip_hdr->ip_dst, ip_dst_str, sizeof(ip_dst_str)); | |
450 | ||
02e5bd72 DS |
451 | zlog_warn("%s: igmp kernel upcall on %s(%p) for %s -> %s", |
452 | __PRETTY_FUNCTION__, ifp->name, igmp, ip_src_str, ip_dst_str); | |
b05b72e8 | 453 | } |
02e5bd72 DS |
454 | if (igmp) |
455 | pim_igmp_packet(igmp, (char *)buf, buf_size); | |
b05b72e8 DW |
456 | |
457 | } else if (ip_hdr->ip_p) { | |
6c7197b1 | 458 | if (PIM_DEBUG_MROUTE_DETAIL) { |
e5d33c83 DS |
459 | pim_inet4_dump("<src?>", ip_hdr->ip_src, src_str, sizeof(src_str)); |
460 | pim_inet4_dump("<grp?>", ip_hdr->ip_dst, grp_str, sizeof(grp_str)); | |
b05b72e8 DW |
461 | zlog_debug("%s: no kernel upcall proto=%d src: %s dst: %s msg_size=%d", |
462 | __PRETTY_FUNCTION__, ip_hdr->ip_p, src_str, grp_str, buf_size); | |
e355e30f | 463 | } |
e355e30f | 464 | |
b05b72e8 DW |
465 | } else { |
466 | msg = (const struct igmpmsg *) buf; | |
e355e30f | 467 | |
b05b72e8 | 468 | ifp = pim_if_find_by_vif_index(msg->im_vif); |
e355e30f | 469 | |
b05b72e8 DW |
470 | if (PIM_DEBUG_MROUTE) { |
471 | pim_inet4_dump("<src?>", msg->im_src, src_str, sizeof(src_str)); | |
472 | pim_inet4_dump("<grp?>", msg->im_dst, grp_str, sizeof(grp_str)); | |
473 | 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", | |
474 | __PRETTY_FUNCTION__, | |
475 | igmpmsgtype2str[msg->im_msgtype], | |
476 | msg->im_msgtype, | |
477 | ip_hdr->ip_p, | |
478 | fd, | |
479 | src_str, | |
480 | grp_str, | |
481 | ifp->name, | |
482 | msg->im_vif, buf_size); | |
483 | } | |
e355e30f | 484 | |
b05b72e8 DW |
485 | switch (msg->im_msgtype) { |
486 | case IGMPMSG_WRONGVIF: | |
487 | return pim_mroute_msg_wrongvif(fd, ifp, msg); | |
488 | break; | |
489 | case IGMPMSG_NOCACHE: | |
490 | return pim_mroute_msg_nocache(fd, ifp, msg); | |
491 | break; | |
492 | case IGMPMSG_WHOLEPKT: | |
493 | return pim_mroute_msg_wholepkt(fd, ifp, (const char *)msg); | |
494 | break; | |
495 | case IGMPMSG_WRVIFWHOLE: | |
496 | return pim_mroute_msg_wrvifwhole (fd, ifp, (const char *)msg); | |
497 | break; | |
498 | default: | |
499 | break; | |
500 | } | |
e355e30f | 501 | } |
12e41d03 DL |
502 | |
503 | return 0; | |
504 | } | |
505 | ||
506 | static int mroute_read_msg(int fd) | |
507 | { | |
eab2a327 | 508 | char buf[10000]; |
12e41d03 DL |
509 | int rd; |
510 | ||
12e41d03 DL |
511 | rd = read(fd, buf, sizeof(buf)); |
512 | if (rd < 0) { | |
513 | zlog_warn("%s: failure reading fd=%d: errno=%d: %s", | |
514 | __PRETTY_FUNCTION__, fd, errno, safe_strerror(errno)); | |
f0ce50d4 | 515 | return -1; |
12e41d03 DL |
516 | } |
517 | ||
518 | return pim_mroute_msg(fd, buf, rd); | |
519 | } | |
520 | ||
521 | static int mroute_read(struct thread *t) | |
522 | { | |
523 | int fd; | |
524 | int result; | |
525 | ||
526 | zassert(t); | |
527 | zassert(!THREAD_ARG(t)); | |
528 | ||
529 | fd = THREAD_FD(t); | |
530 | zassert(fd == qpim_mroute_socket_fd); | |
531 | ||
532 | result = mroute_read_msg(fd); | |
533 | ||
534 | /* Keep reading */ | |
535 | qpim_mroute_socket_reader = 0; | |
536 | mroute_read_on(); | |
537 | ||
538 | return result; | |
539 | } | |
540 | ||
541 | static void mroute_read_on() | |
542 | { | |
543 | zassert(!qpim_mroute_socket_reader); | |
544 | zassert(PIM_MROUTE_IS_ENABLED); | |
545 | ||
546 | THREAD_READ_ON(master, qpim_mroute_socket_reader, | |
547 | mroute_read, 0, qpim_mroute_socket_fd); | |
548 | } | |
549 | ||
550 | static void mroute_read_off() | |
551 | { | |
552 | THREAD_OFF(qpim_mroute_socket_reader); | |
553 | } | |
554 | ||
555 | int pim_mroute_socket_enable() | |
556 | { | |
557 | int fd; | |
558 | ||
559 | if (PIM_MROUTE_IS_ENABLED) | |
560 | return -1; | |
561 | ||
562 | if ( pimd_privs.change (ZPRIVS_RAISE) ) | |
563 | zlog_err ("pim_mroute_socket_enable: could not raise privs, %s", | |
564 | safe_strerror (errno) ); | |
565 | ||
566 | fd = socket(AF_INET, SOCK_RAW, IPPROTO_IGMP); | |
567 | ||
568 | if ( pimd_privs.change (ZPRIVS_LOWER) ) | |
569 | zlog_err ("pim_mroute_socket_enable: could not lower privs, %s", | |
570 | safe_strerror (errno) ); | |
571 | ||
572 | if (fd < 0) { | |
573 | zlog_warn("Could not create mroute socket: errno=%d: %s", | |
574 | errno, safe_strerror(errno)); | |
575 | return -2; | |
576 | } | |
577 | ||
578 | if (pim_mroute_set(fd, 1)) { | |
579 | zlog_warn("Could not enable mroute on socket fd=%d: errno=%d: %s", | |
580 | fd, errno, safe_strerror(errno)); | |
581 | close(fd); | |
582 | return -3; | |
583 | } | |
584 | ||
585 | qpim_mroute_socket_fd = fd; | |
b45cefcb | 586 | |
12e41d03 DL |
587 | qpim_mroute_socket_creation = pim_time_monotonic_sec(); |
588 | mroute_read_on(); | |
589 | ||
12e41d03 DL |
590 | return 0; |
591 | } | |
592 | ||
593 | int pim_mroute_socket_disable() | |
594 | { | |
595 | if (PIM_MROUTE_IS_DISABLED) | |
596 | return -1; | |
597 | ||
598 | if (pim_mroute_set(qpim_mroute_socket_fd, 0)) { | |
599 | zlog_warn("Could not disable mroute on socket fd=%d: errno=%d: %s", | |
600 | qpim_mroute_socket_fd, errno, safe_strerror(errno)); | |
601 | return -2; | |
602 | } | |
603 | ||
604 | if (close(qpim_mroute_socket_fd)) { | |
605 | zlog_warn("Failure closing mroute socket: fd=%d errno=%d: %s", | |
606 | qpim_mroute_socket_fd, errno, safe_strerror(errno)); | |
607 | return -3; | |
608 | } | |
609 | ||
610 | mroute_read_off(); | |
611 | qpim_mroute_socket_fd = -1; | |
612 | ||
12e41d03 DL |
613 | return 0; |
614 | } | |
615 | ||
616 | /* | |
617 | For each network interface (e.g., physical or a virtual tunnel) that | |
618 | would be used for multicast forwarding, a corresponding multicast | |
619 | interface must be added to the kernel. | |
620 | */ | |
744d91b3 | 621 | int pim_mroute_add_vif(struct interface *ifp, struct in_addr ifaddr, unsigned char flags) |
12e41d03 | 622 | { |
744d91b3 | 623 | struct pim_interface *pim_ifp = ifp->info; |
12e41d03 DL |
624 | struct vifctl vc; |
625 | int err; | |
626 | ||
627 | if (PIM_MROUTE_IS_DISABLED) { | |
628 | zlog_warn("%s: global multicast is disabled", | |
629 | __PRETTY_FUNCTION__); | |
630 | return -1; | |
631 | } | |
632 | ||
633 | memset(&vc, 0, sizeof(vc)); | |
744d91b3 | 634 | vc.vifc_vifi = pim_ifp->mroute_vif_index; |
b3f2bf7c | 635 | #ifdef VIFF_USE_IFINDEX |
744d91b3 | 636 | vc.vifc_lcl_ifindex = ifp->ifindex; |
b3f2bf7c RW |
637 | #else |
638 | if (ifaddr.s_addr == INADDR_ANY) { | |
639 | zlog_warn("%s: unnumbered interfaces are not supported on this platform", | |
640 | __PRETTY_FUNCTION__); | |
641 | return -1; | |
642 | } | |
643 | memcpy(&vc.vifc_lcl_addr, &ifaddr, sizeof(vc.vifc_lcl_addr)); | |
644 | #endif | |
b45cefcb | 645 | vc.vifc_flags = flags; |
12e41d03 DL |
646 | vc.vifc_threshold = PIM_MROUTE_MIN_TTL; |
647 | vc.vifc_rate_limit = 0; | |
12e41d03 DL |
648 | |
649 | #ifdef PIM_DVMRP_TUNNEL | |
650 | if (vc.vifc_flags & VIFF_TUNNEL) { | |
651 | memcpy(&vc.vifc_rmt_addr, &vif_remote_addr, sizeof(vc.vifc_rmt_addr)); | |
652 | } | |
653 | #endif | |
654 | ||
b45cefcb | 655 | err = setsockopt(qpim_mroute_socket_fd, IPPROTO_IP, MRT_ADD_VIF, (void*) &vc, sizeof(vc)); |
12e41d03 | 656 | if (err) { |
eaa54bdb | 657 | char ifaddr_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
658 | |
659 | pim_inet4_dump("<ifaddr?>", ifaddr, ifaddr_str, sizeof(ifaddr_str)); | |
660 | ||
59471fb8 | 661 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_ADD_VIF,vif_index=%d,ifaddr=%s,flag=%d): errno=%d: %s", |
12e41d03 | 662 | __FILE__, __PRETTY_FUNCTION__, |
744d91b3 | 663 | qpim_mroute_socket_fd, ifp->ifindex, ifaddr_str, flags, |
3d7765d7 | 664 | errno, safe_strerror(errno)); |
12e41d03 DL |
665 | return -2; |
666 | } | |
667 | ||
668 | return 0; | |
669 | } | |
670 | ||
671 | int pim_mroute_del_vif(int vif_index) | |
672 | { | |
673 | struct vifctl vc; | |
674 | int err; | |
675 | ||
676 | if (PIM_MROUTE_IS_DISABLED) { | |
677 | zlog_warn("%s: global multicast is disabled", | |
678 | __PRETTY_FUNCTION__); | |
679 | return -1; | |
680 | } | |
681 | ||
682 | memset(&vc, 0, sizeof(vc)); | |
683 | vc.vifc_vifi = vif_index; | |
684 | ||
685 | err = setsockopt(qpim_mroute_socket_fd, IPPROTO_IP, MRT_DEL_VIF, (void*) &vc, sizeof(vc)); | |
686 | if (err) { | |
12e41d03 DL |
687 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_DEL_VIF,vif_index=%d): errno=%d: %s", |
688 | __FILE__, __PRETTY_FUNCTION__, | |
689 | qpim_mroute_socket_fd, vif_index, | |
3d7765d7 | 690 | errno, safe_strerror(errno)); |
12e41d03 DL |
691 | return -2; |
692 | } | |
693 | ||
694 | return 0; | |
695 | } | |
696 | ||
c171d6d8 | 697 | int pim_mroute_add(struct channel_oil *c_oil) |
12e41d03 DL |
698 | { |
699 | int err; | |
2ca35b3d | 700 | int orig = 0; |
0365f56b | 701 | int orig_iif_vif = 0; |
12e41d03 DL |
702 | |
703 | qpim_mroute_add_last = pim_time_monotonic_sec(); | |
704 | ++qpim_mroute_add_events; | |
705 | ||
706 | if (PIM_MROUTE_IS_DISABLED) { | |
707 | zlog_warn("%s: global multicast is disabled", | |
708 | __PRETTY_FUNCTION__); | |
709 | return -1; | |
710 | } | |
711 | ||
d3aded99 DS |
712 | /* The linux kernel *expects* the incoming |
713 | * vif to be part of the outgoing list | |
714 | * in the case of a (*,G). | |
715 | */ | |
c171d6d8 | 716 | if (c_oil->oil.mfcc_origin.s_addr == INADDR_ANY) |
d3aded99 | 717 | { |
c171d6d8 DS |
718 | orig = c_oil->oil.mfcc_ttls[c_oil->oil.mfcc_parent]; |
719 | c_oil->oil.mfcc_ttls[c_oil->oil.mfcc_parent] = 1; | |
d3aded99 DS |
720 | } |
721 | ||
0365f56b DS |
722 | /* |
723 | * If we have an unresolved cache entry for the S,G | |
724 | * it is owned by the pimreg for the incoming IIF | |
725 | * So set pimreg as the IIF temporarily to cause | |
726 | * the packets to be forwarded. Then set it | |
727 | * to the correct IIF afterwords. | |
728 | */ | |
729 | if (!c_oil->installed && c_oil->oil.mfcc_origin.s_addr != INADDR_ANY && | |
730 | c_oil->oil.mfcc_parent != 0) | |
731 | { | |
732 | orig_iif_vif = c_oil->oil.mfcc_parent; | |
733 | c_oil->oil.mfcc_parent = 0; | |
734 | } | |
12e41d03 | 735 | err = setsockopt(qpim_mroute_socket_fd, IPPROTO_IP, MRT_ADD_MFC, |
c171d6d8 | 736 | &c_oil->oil, sizeof(c_oil->oil)); |
d3aded99 | 737 | |
0365f56b DS |
738 | if (!err && !c_oil->installed && c_oil->oil.mfcc_origin.s_addr != INADDR_ANY && |
739 | orig_iif_vif != 0) | |
740 | { | |
741 | c_oil->oil.mfcc_parent = orig_iif_vif; | |
742 | err = setsockopt (qpim_mroute_socket_fd, IPPROTO_IP, MRT_ADD_MFC, | |
743 | &c_oil->oil, sizeof (c_oil->oil)); | |
744 | } | |
745 | ||
c171d6d8 DS |
746 | if (c_oil->oil.mfcc_origin.s_addr == INADDR_ANY) |
747 | c_oil->oil.mfcc_ttls[c_oil->oil.mfcc_parent] = orig; | |
d3aded99 | 748 | |
12e41d03 | 749 | if (err) { |
12e41d03 DL |
750 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_ADD_MFC): errno=%d: %s", |
751 | __FILE__, __PRETTY_FUNCTION__, | |
752 | qpim_mroute_socket_fd, | |
3d7765d7 | 753 | errno, safe_strerror(errno)); |
12e41d03 DL |
754 | return -2; |
755 | } | |
756 | ||
58302dc7 | 757 | c_oil->installed = 1; |
12e41d03 DL |
758 | return 0; |
759 | } | |
760 | ||
c171d6d8 | 761 | int pim_mroute_del (struct channel_oil *c_oil) |
12e41d03 DL |
762 | { |
763 | int err; | |
764 | ||
765 | qpim_mroute_del_last = pim_time_monotonic_sec(); | |
766 | ++qpim_mroute_del_events; | |
767 | ||
768 | if (PIM_MROUTE_IS_DISABLED) { | |
769 | zlog_warn("%s: global multicast is disabled", | |
770 | __PRETTY_FUNCTION__); | |
771 | return -1; | |
772 | } | |
773 | ||
c171d6d8 | 774 | err = setsockopt(qpim_mroute_socket_fd, IPPROTO_IP, MRT_DEL_MFC, &c_oil->oil, sizeof(c_oil->oil)); |
12e41d03 | 775 | if (err) { |
05ca4827 DS |
776 | if (PIM_DEBUG_MROUTE) |
777 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_DEL_MFC): errno=%d: %s", | |
778 | __FILE__, __PRETTY_FUNCTION__, | |
779 | qpim_mroute_socket_fd, | |
780 | errno, safe_strerror(errno)); | |
12e41d03 DL |
781 | return -2; |
782 | } | |
783 | ||
58302dc7 DS |
784 | c_oil->installed = 0; |
785 | ||
12e41d03 DL |
786 | return 0; |
787 | } | |
3667e8a0 DS |
788 | |
789 | void | |
790 | pim_mroute_update_counters (struct channel_oil *c_oil) | |
791 | { | |
792 | struct sioc_sg_req sgreq; | |
793 | ||
3667e8a0 DS |
794 | c_oil->cc.oldpktcnt = c_oil->cc.pktcnt; |
795 | c_oil->cc.oldbytecnt = c_oil->cc.bytecnt; | |
796 | c_oil->cc.oldwrong_if = c_oil->cc.wrong_if; | |
797 | ||
c7b1183f DS |
798 | if (!c_oil->installed) |
799 | { | |
800 | c_oil->cc.lastused = 100 * qpim_keep_alive_time; | |
801 | if (PIM_DEBUG_MROUTE) | |
802 | { | |
803 | struct prefix_sg sg; | |
804 | ||
805 | sg.src = c_oil->oil.mfcc_origin; | |
806 | sg.grp = c_oil->oil.mfcc_mcastgrp; | |
807 | if (PIM_DEBUG_MROUTE) | |
808 | zlog_debug("Channel(%s) is not installed no need to collect data from kernel", | |
809 | pim_str_sg_dump (&sg)); | |
810 | } | |
811 | return; | |
812 | } | |
813 | ||
814 | memset (&sgreq, 0, sizeof(sgreq)); | |
815 | sgreq.src = c_oil->oil.mfcc_origin; | |
816 | sgreq.grp = c_oil->oil.mfcc_mcastgrp; | |
817 | ||
51e82833 | 818 | pim_zlookup_sg_statistics (c_oil); |
3667e8a0 DS |
819 | if (ioctl (qpim_mroute_socket_fd, SIOCGETSGCNT, &sgreq)) |
820 | { | |
c7b1183f DS |
821 | if (PIM_DEBUG_MROUTE) |
822 | { | |
823 | struct prefix_sg sg; | |
824 | ||
825 | sg.src = c_oil->oil.mfcc_origin; | |
826 | sg.grp = c_oil->oil.mfcc_mcastgrp; | |
827 | ||
828 | zlog_warn ("ioctl(SIOCGETSGCNT=%lu) failure for (S,G)=(%s): errno=%d: %s", | |
829 | (unsigned long)SIOCGETSGCNT, | |
830 | pim_str_sg_dump (&sg), | |
831 | errno, | |
832 | safe_strerror(errno)); | |
833 | } | |
3667e8a0 DS |
834 | return; |
835 | } | |
836 | ||
837 | c_oil->cc.pktcnt = sgreq.pktcnt; | |
838 | c_oil->cc.bytecnt = sgreq.bytecnt; | |
839 | c_oil->cc.wrong_if = sgreq.wrong_if; | |
840 | ||
841 | return; | |
842 | } |