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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 | { | |
7fe1f662 DS |
338 | /* |
339 | * If we are the fhr that means we are getting a callback during | |
340 | * the pimreg period, so I believe we can ignore this packet | |
341 | */ | |
0bf27c5c | 342 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
7fe1f662 DS |
343 | { |
344 | struct pim_nexthop source; | |
4df01a4e DS |
345 | struct pim_rpf *rpf = RP (sg.grp); |
346 | pim_ifp = rpf->source_nexthop.interface->info; | |
347 | ||
f89022af | 348 | memset (&source, 0, sizeof (source)); |
7fe1f662 | 349 | //No if channel, but upstream we are at the RP. |
88d6652e DS |
350 | if (pim_nexthop_lookup (&source, up->upstream_register, 0) == 0) |
351 | pim_register_stop_send(source.interface, &sg, pim_ifp->primary_address, up->upstream_register); | |
51e82833 DS |
352 | if (!up->channel_oil) |
353 | up->channel_oil = pim_channel_oil_add (&sg, pim_ifp->mroute_vif_index); | |
5b668dd7 | 354 | pim_upstream_inherited_olist (up); |
51e82833 DS |
355 | if (!up->channel_oil->installed) |
356 | pim_mroute_add (up->channel_oil); | |
7fe1f662 DS |
357 | //Send S bit down the join. |
358 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
359 | } | |
5b668dd7 DS |
360 | else |
361 | { | |
362 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); | |
363 | pim_upstream_inherited_olist (up); | |
364 | pim_mroute_msg_wholepkt (fd, ifp, buf); | |
365 | } | |
366 | return 0; | |
8e38a2cf DS |
367 | } |
368 | ||
5f6f65b1 DS |
369 | pim_ifp = ifp->info; |
370 | oil = pim_channel_oil_add (&sg, pim_ifp->mroute_vif_index); | |
371 | if (!oil->installed) | |
372 | pim_mroute_add (oil); | |
373 | if (pim_if_connected_to_source (ifp, sg.src)) | |
08e1fe76 | 374 | { |
e5905a3b | 375 | up = pim_upstream_add (&sg, ifp, PIM_UPSTREAM_FLAG_MASK_FHR, __PRETTY_FUNCTION__); |
5f6f65b1 DS |
376 | if (!up) |
377 | { | |
378 | if (PIM_DEBUG_MROUTE) | |
379 | zlog_debug ("%s: WRONGVIF%s unable to create upstream on interface", | |
380 | pim_str_sg_dump (&sg), ifp->name); | |
381 | return -2; | |
382 | } | |
a9b59879 | 383 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); |
5ce79466 | 384 | PIM_UPSTREAM_FLAG_SET_CREATED_BY_UPSTREAM(up->flags); |
08e1fe76 | 385 | |
5f6f65b1 DS |
386 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); |
387 | up->channel_oil = oil; | |
388 | up->channel_oil->cc.pktcnt++; | |
389 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
390 | up->join_state = PIM_UPSTREAM_JOINED; | |
391 | pim_upstream_inherited_olist (up); | |
08e1fe76 | 392 | |
5f6f65b1 DS |
393 | // Send the packet to the RP |
394 | pim_mroute_msg_wholepkt (fd, ifp, buf); | |
395 | } | |
08e1fe76 DS |
396 | |
397 | return 0; | |
398 | } | |
399 | ||
e355e30f DS |
400 | int pim_mroute_msg(int fd, const char *buf, int buf_size) |
401 | { | |
402 | struct interface *ifp; | |
b05b72e8 | 403 | struct pim_interface *pim_ifp; |
e355e30f DS |
404 | const struct ip *ip_hdr; |
405 | const struct igmpmsg *msg; | |
eaa54bdb DW |
406 | char ip_src_str[INET_ADDRSTRLEN] = ""; |
407 | char ip_dst_str[INET_ADDRSTRLEN] = ""; | |
408 | char src_str[INET_ADDRSTRLEN] = "<src?>"; | |
409 | char grp_str[INET_ADDRSTRLEN] = "<grp?>"; | |
b05b72e8 DW |
410 | struct in_addr ifaddr; |
411 | struct igmp_sock *igmp; | |
12e41d03 | 412 | |
e355e30f DS |
413 | ip_hdr = (const struct ip *) buf; |
414 | ||
b05b72e8 DW |
415 | if (ip_hdr->ip_p == IPPROTO_IGMP) { |
416 | ||
417 | /* We have the IP packet but we do not know which interface this packet was | |
418 | * received on. Find the interface that is on the same subnet as the source | |
419 | * of the IP packet. | |
420 | */ | |
9f0edbc9 | 421 | ifp = pim_if_lookup_address_vrf (ip_hdr->ip_src, VRF_DEFAULT); |
b05b72e8 DW |
422 | |
423 | if (!ifp) { | |
424 | if (PIM_DEBUG_MROUTE_DETAIL) { | |
425 | pim_inet4_dump("<src?>", ip_hdr->ip_src, ip_src_str, sizeof(ip_src_str)); | |
426 | pim_inet4_dump("<dst?>", ip_hdr->ip_dst, ip_dst_str, sizeof(ip_dst_str)); | |
427 | ||
9f0edbc9 | 428 | zlog_warn("%s: igmp kernel upcall could not find usable interface for %s -> %s", |
b05b72e8 DW |
429 | __PRETTY_FUNCTION__, |
430 | ip_src_str, | |
431 | ip_dst_str); | |
432 | } | |
433 | return 0; | |
434 | } | |
b05b72e8 DW |
435 | pim_ifp = ifp->info; |
436 | ifaddr = pim_find_primary_addr(ifp); | |
437 | igmp = pim_igmp_sock_lookup_ifaddr(pim_ifp->igmp_socket_list, ifaddr); | |
438 | ||
02e5bd72 | 439 | if (PIM_DEBUG_MROUTE) { |
b05b72e8 DW |
440 | pim_inet4_dump("<src?>", ip_hdr->ip_src, ip_src_str, sizeof(ip_src_str)); |
441 | pim_inet4_dump("<dst?>", ip_hdr->ip_dst, ip_dst_str, sizeof(ip_dst_str)); | |
442 | ||
02e5bd72 DS |
443 | zlog_warn("%s: igmp kernel upcall on %s(%p) for %s -> %s", |
444 | __PRETTY_FUNCTION__, ifp->name, igmp, ip_src_str, ip_dst_str); | |
b05b72e8 | 445 | } |
02e5bd72 DS |
446 | if (igmp) |
447 | pim_igmp_packet(igmp, (char *)buf, buf_size); | |
b05b72e8 DW |
448 | |
449 | } else if (ip_hdr->ip_p) { | |
6c7197b1 | 450 | if (PIM_DEBUG_MROUTE_DETAIL) { |
e5d33c83 DS |
451 | pim_inet4_dump("<src?>", ip_hdr->ip_src, src_str, sizeof(src_str)); |
452 | pim_inet4_dump("<grp?>", ip_hdr->ip_dst, grp_str, sizeof(grp_str)); | |
b05b72e8 DW |
453 | zlog_debug("%s: no kernel upcall proto=%d src: %s dst: %s msg_size=%d", |
454 | __PRETTY_FUNCTION__, ip_hdr->ip_p, src_str, grp_str, buf_size); | |
e355e30f | 455 | } |
e355e30f | 456 | |
b05b72e8 DW |
457 | } else { |
458 | msg = (const struct igmpmsg *) buf; | |
e355e30f | 459 | |
b05b72e8 | 460 | ifp = pim_if_find_by_vif_index(msg->im_vif); |
e355e30f | 461 | |
b05b72e8 DW |
462 | if (PIM_DEBUG_MROUTE) { |
463 | pim_inet4_dump("<src?>", msg->im_src, src_str, sizeof(src_str)); | |
464 | pim_inet4_dump("<grp?>", msg->im_dst, grp_str, sizeof(grp_str)); | |
465 | 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", | |
466 | __PRETTY_FUNCTION__, | |
467 | igmpmsgtype2str[msg->im_msgtype], | |
468 | msg->im_msgtype, | |
469 | ip_hdr->ip_p, | |
470 | fd, | |
471 | src_str, | |
472 | grp_str, | |
473 | ifp->name, | |
474 | msg->im_vif, buf_size); | |
475 | } | |
e355e30f | 476 | |
b05b72e8 DW |
477 | switch (msg->im_msgtype) { |
478 | case IGMPMSG_WRONGVIF: | |
479 | return pim_mroute_msg_wrongvif(fd, ifp, msg); | |
480 | break; | |
481 | case IGMPMSG_NOCACHE: | |
482 | return pim_mroute_msg_nocache(fd, ifp, msg); | |
483 | break; | |
484 | case IGMPMSG_WHOLEPKT: | |
485 | return pim_mroute_msg_wholepkt(fd, ifp, (const char *)msg); | |
486 | break; | |
487 | case IGMPMSG_WRVIFWHOLE: | |
488 | return pim_mroute_msg_wrvifwhole (fd, ifp, (const char *)msg); | |
489 | break; | |
490 | default: | |
491 | break; | |
492 | } | |
e355e30f | 493 | } |
12e41d03 DL |
494 | |
495 | return 0; | |
496 | } | |
497 | ||
498 | static int mroute_read_msg(int fd) | |
499 | { | |
eab2a327 | 500 | char buf[10000]; |
12e41d03 DL |
501 | int rd; |
502 | ||
12e41d03 DL |
503 | rd = read(fd, buf, sizeof(buf)); |
504 | if (rd < 0) { | |
505 | zlog_warn("%s: failure reading fd=%d: errno=%d: %s", | |
506 | __PRETTY_FUNCTION__, fd, errno, safe_strerror(errno)); | |
f0ce50d4 | 507 | return -1; |
12e41d03 DL |
508 | } |
509 | ||
510 | return pim_mroute_msg(fd, buf, rd); | |
511 | } | |
512 | ||
513 | static int mroute_read(struct thread *t) | |
514 | { | |
515 | int fd; | |
516 | int result; | |
517 | ||
518 | zassert(t); | |
519 | zassert(!THREAD_ARG(t)); | |
520 | ||
521 | fd = THREAD_FD(t); | |
522 | zassert(fd == qpim_mroute_socket_fd); | |
523 | ||
524 | result = mroute_read_msg(fd); | |
525 | ||
526 | /* Keep reading */ | |
527 | qpim_mroute_socket_reader = 0; | |
528 | mroute_read_on(); | |
529 | ||
530 | return result; | |
531 | } | |
532 | ||
533 | static void mroute_read_on() | |
534 | { | |
535 | zassert(!qpim_mroute_socket_reader); | |
536 | zassert(PIM_MROUTE_IS_ENABLED); | |
537 | ||
538 | THREAD_READ_ON(master, qpim_mroute_socket_reader, | |
539 | mroute_read, 0, qpim_mroute_socket_fd); | |
540 | } | |
541 | ||
542 | static void mroute_read_off() | |
543 | { | |
544 | THREAD_OFF(qpim_mroute_socket_reader); | |
545 | } | |
546 | ||
547 | int pim_mroute_socket_enable() | |
548 | { | |
549 | int fd; | |
550 | ||
551 | if (PIM_MROUTE_IS_ENABLED) | |
552 | return -1; | |
553 | ||
554 | if ( pimd_privs.change (ZPRIVS_RAISE) ) | |
555 | zlog_err ("pim_mroute_socket_enable: could not raise privs, %s", | |
556 | safe_strerror (errno) ); | |
557 | ||
558 | fd = socket(AF_INET, SOCK_RAW, IPPROTO_IGMP); | |
559 | ||
560 | if ( pimd_privs.change (ZPRIVS_LOWER) ) | |
561 | zlog_err ("pim_mroute_socket_enable: could not lower privs, %s", | |
562 | safe_strerror (errno) ); | |
563 | ||
564 | if (fd < 0) { | |
565 | zlog_warn("Could not create mroute socket: errno=%d: %s", | |
566 | errno, safe_strerror(errno)); | |
567 | return -2; | |
568 | } | |
569 | ||
570 | if (pim_mroute_set(fd, 1)) { | |
571 | zlog_warn("Could not enable mroute on socket fd=%d: errno=%d: %s", | |
572 | fd, errno, safe_strerror(errno)); | |
573 | close(fd); | |
574 | return -3; | |
575 | } | |
576 | ||
577 | qpim_mroute_socket_fd = fd; | |
b45cefcb | 578 | |
12e41d03 DL |
579 | qpim_mroute_socket_creation = pim_time_monotonic_sec(); |
580 | mroute_read_on(); | |
581 | ||
12e41d03 DL |
582 | return 0; |
583 | } | |
584 | ||
585 | int pim_mroute_socket_disable() | |
586 | { | |
587 | if (PIM_MROUTE_IS_DISABLED) | |
588 | return -1; | |
589 | ||
590 | if (pim_mroute_set(qpim_mroute_socket_fd, 0)) { | |
591 | zlog_warn("Could not disable mroute on socket fd=%d: errno=%d: %s", | |
592 | qpim_mroute_socket_fd, errno, safe_strerror(errno)); | |
593 | return -2; | |
594 | } | |
595 | ||
596 | if (close(qpim_mroute_socket_fd)) { | |
597 | zlog_warn("Failure closing mroute socket: fd=%d errno=%d: %s", | |
598 | qpim_mroute_socket_fd, errno, safe_strerror(errno)); | |
599 | return -3; | |
600 | } | |
601 | ||
602 | mroute_read_off(); | |
603 | qpim_mroute_socket_fd = -1; | |
604 | ||
12e41d03 DL |
605 | return 0; |
606 | } | |
607 | ||
608 | /* | |
609 | For each network interface (e.g., physical or a virtual tunnel) that | |
610 | would be used for multicast forwarding, a corresponding multicast | |
611 | interface must be added to the kernel. | |
612 | */ | |
744d91b3 | 613 | int pim_mroute_add_vif(struct interface *ifp, struct in_addr ifaddr, unsigned char flags) |
12e41d03 | 614 | { |
744d91b3 | 615 | struct pim_interface *pim_ifp = ifp->info; |
12e41d03 DL |
616 | struct vifctl vc; |
617 | int err; | |
618 | ||
619 | if (PIM_MROUTE_IS_DISABLED) { | |
620 | zlog_warn("%s: global multicast is disabled", | |
621 | __PRETTY_FUNCTION__); | |
622 | return -1; | |
623 | } | |
624 | ||
625 | memset(&vc, 0, sizeof(vc)); | |
744d91b3 | 626 | vc.vifc_vifi = pim_ifp->mroute_vif_index; |
b3f2bf7c | 627 | #ifdef VIFF_USE_IFINDEX |
744d91b3 | 628 | vc.vifc_lcl_ifindex = ifp->ifindex; |
b3f2bf7c RW |
629 | #else |
630 | if (ifaddr.s_addr == INADDR_ANY) { | |
631 | zlog_warn("%s: unnumbered interfaces are not supported on this platform", | |
632 | __PRETTY_FUNCTION__); | |
633 | return -1; | |
634 | } | |
635 | memcpy(&vc.vifc_lcl_addr, &ifaddr, sizeof(vc.vifc_lcl_addr)); | |
636 | #endif | |
b45cefcb | 637 | vc.vifc_flags = flags; |
12e41d03 DL |
638 | vc.vifc_threshold = PIM_MROUTE_MIN_TTL; |
639 | vc.vifc_rate_limit = 0; | |
12e41d03 DL |
640 | |
641 | #ifdef PIM_DVMRP_TUNNEL | |
642 | if (vc.vifc_flags & VIFF_TUNNEL) { | |
643 | memcpy(&vc.vifc_rmt_addr, &vif_remote_addr, sizeof(vc.vifc_rmt_addr)); | |
644 | } | |
645 | #endif | |
646 | ||
b45cefcb | 647 | err = setsockopt(qpim_mroute_socket_fd, IPPROTO_IP, MRT_ADD_VIF, (void*) &vc, sizeof(vc)); |
12e41d03 | 648 | if (err) { |
eaa54bdb | 649 | char ifaddr_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
650 | |
651 | pim_inet4_dump("<ifaddr?>", ifaddr, ifaddr_str, sizeof(ifaddr_str)); | |
652 | ||
59471fb8 | 653 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_ADD_VIF,vif_index=%d,ifaddr=%s,flag=%d): errno=%d: %s", |
12e41d03 | 654 | __FILE__, __PRETTY_FUNCTION__, |
744d91b3 | 655 | qpim_mroute_socket_fd, ifp->ifindex, ifaddr_str, flags, |
3d7765d7 | 656 | errno, safe_strerror(errno)); |
12e41d03 DL |
657 | return -2; |
658 | } | |
659 | ||
660 | return 0; | |
661 | } | |
662 | ||
663 | int pim_mroute_del_vif(int vif_index) | |
664 | { | |
665 | struct vifctl vc; | |
666 | int err; | |
667 | ||
668 | if (PIM_MROUTE_IS_DISABLED) { | |
669 | zlog_warn("%s: global multicast is disabled", | |
670 | __PRETTY_FUNCTION__); | |
671 | return -1; | |
672 | } | |
673 | ||
674 | memset(&vc, 0, sizeof(vc)); | |
675 | vc.vifc_vifi = vif_index; | |
676 | ||
677 | err = setsockopt(qpim_mroute_socket_fd, IPPROTO_IP, MRT_DEL_VIF, (void*) &vc, sizeof(vc)); | |
678 | if (err) { | |
12e41d03 DL |
679 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_DEL_VIF,vif_index=%d): errno=%d: %s", |
680 | __FILE__, __PRETTY_FUNCTION__, | |
681 | qpim_mroute_socket_fd, vif_index, | |
3d7765d7 | 682 | errno, safe_strerror(errno)); |
12e41d03 DL |
683 | return -2; |
684 | } | |
685 | ||
686 | return 0; | |
687 | } | |
688 | ||
c171d6d8 | 689 | int pim_mroute_add(struct channel_oil *c_oil) |
12e41d03 DL |
690 | { |
691 | int err; | |
2ca35b3d | 692 | int orig = 0; |
0365f56b | 693 | int orig_iif_vif = 0; |
12e41d03 DL |
694 | |
695 | qpim_mroute_add_last = pim_time_monotonic_sec(); | |
696 | ++qpim_mroute_add_events; | |
697 | ||
698 | if (PIM_MROUTE_IS_DISABLED) { | |
699 | zlog_warn("%s: global multicast is disabled", | |
700 | __PRETTY_FUNCTION__); | |
701 | return -1; | |
702 | } | |
703 | ||
d3aded99 DS |
704 | /* The linux kernel *expects* the incoming |
705 | * vif to be part of the outgoing list | |
706 | * in the case of a (*,G). | |
707 | */ | |
c171d6d8 | 708 | if (c_oil->oil.mfcc_origin.s_addr == INADDR_ANY) |
d3aded99 | 709 | { |
c171d6d8 DS |
710 | orig = c_oil->oil.mfcc_ttls[c_oil->oil.mfcc_parent]; |
711 | c_oil->oil.mfcc_ttls[c_oil->oil.mfcc_parent] = 1; | |
d3aded99 DS |
712 | } |
713 | ||
0365f56b DS |
714 | /* |
715 | * If we have an unresolved cache entry for the S,G | |
716 | * it is owned by the pimreg for the incoming IIF | |
717 | * So set pimreg as the IIF temporarily to cause | |
718 | * the packets to be forwarded. Then set it | |
719 | * to the correct IIF afterwords. | |
720 | */ | |
721 | if (!c_oil->installed && c_oil->oil.mfcc_origin.s_addr != INADDR_ANY && | |
722 | c_oil->oil.mfcc_parent != 0) | |
723 | { | |
724 | orig_iif_vif = c_oil->oil.mfcc_parent; | |
725 | c_oil->oil.mfcc_parent = 0; | |
726 | } | |
12e41d03 | 727 | err = setsockopt(qpim_mroute_socket_fd, IPPROTO_IP, MRT_ADD_MFC, |
c171d6d8 | 728 | &c_oil->oil, sizeof(c_oil->oil)); |
d3aded99 | 729 | |
0365f56b DS |
730 | if (!err && !c_oil->installed && c_oil->oil.mfcc_origin.s_addr != INADDR_ANY && |
731 | orig_iif_vif != 0) | |
732 | { | |
733 | c_oil->oil.mfcc_parent = orig_iif_vif; | |
734 | err = setsockopt (qpim_mroute_socket_fd, IPPROTO_IP, MRT_ADD_MFC, | |
735 | &c_oil->oil, sizeof (c_oil->oil)); | |
736 | } | |
737 | ||
c171d6d8 DS |
738 | if (c_oil->oil.mfcc_origin.s_addr == INADDR_ANY) |
739 | c_oil->oil.mfcc_ttls[c_oil->oil.mfcc_parent] = orig; | |
d3aded99 | 740 | |
12e41d03 | 741 | if (err) { |
12e41d03 DL |
742 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_ADD_MFC): errno=%d: %s", |
743 | __FILE__, __PRETTY_FUNCTION__, | |
744 | qpim_mroute_socket_fd, | |
3d7765d7 | 745 | errno, safe_strerror(errno)); |
12e41d03 DL |
746 | return -2; |
747 | } | |
748 | ||
58302dc7 | 749 | c_oil->installed = 1; |
12e41d03 DL |
750 | return 0; |
751 | } | |
752 | ||
c171d6d8 | 753 | int pim_mroute_del (struct channel_oil *c_oil) |
12e41d03 DL |
754 | { |
755 | int err; | |
756 | ||
757 | qpim_mroute_del_last = pim_time_monotonic_sec(); | |
758 | ++qpim_mroute_del_events; | |
759 | ||
760 | if (PIM_MROUTE_IS_DISABLED) { | |
761 | zlog_warn("%s: global multicast is disabled", | |
762 | __PRETTY_FUNCTION__); | |
763 | return -1; | |
764 | } | |
765 | ||
c171d6d8 | 766 | err = setsockopt(qpim_mroute_socket_fd, IPPROTO_IP, MRT_DEL_MFC, &c_oil->oil, sizeof(c_oil->oil)); |
12e41d03 | 767 | if (err) { |
05ca4827 DS |
768 | if (PIM_DEBUG_MROUTE) |
769 | zlog_warn("%s %s: failure: setsockopt(fd=%d,IPPROTO_IP,MRT_DEL_MFC): errno=%d: %s", | |
770 | __FILE__, __PRETTY_FUNCTION__, | |
771 | qpim_mroute_socket_fd, | |
772 | errno, safe_strerror(errno)); | |
12e41d03 DL |
773 | return -2; |
774 | } | |
775 | ||
58302dc7 DS |
776 | c_oil->installed = 0; |
777 | ||
12e41d03 DL |
778 | return 0; |
779 | } | |
3667e8a0 DS |
780 | |
781 | void | |
782 | pim_mroute_update_counters (struct channel_oil *c_oil) | |
783 | { | |
784 | struct sioc_sg_req sgreq; | |
785 | ||
3667e8a0 DS |
786 | c_oil->cc.oldpktcnt = c_oil->cc.pktcnt; |
787 | c_oil->cc.oldbytecnt = c_oil->cc.bytecnt; | |
788 | c_oil->cc.oldwrong_if = c_oil->cc.wrong_if; | |
789 | ||
c7b1183f DS |
790 | if (!c_oil->installed) |
791 | { | |
792 | c_oil->cc.lastused = 100 * qpim_keep_alive_time; | |
793 | if (PIM_DEBUG_MROUTE) | |
794 | { | |
795 | struct prefix_sg sg; | |
796 | ||
797 | sg.src = c_oil->oil.mfcc_origin; | |
798 | sg.grp = c_oil->oil.mfcc_mcastgrp; | |
799 | if (PIM_DEBUG_MROUTE) | |
800 | zlog_debug("Channel(%s) is not installed no need to collect data from kernel", | |
801 | pim_str_sg_dump (&sg)); | |
802 | } | |
803 | return; | |
804 | } | |
805 | ||
806 | memset (&sgreq, 0, sizeof(sgreq)); | |
807 | sgreq.src = c_oil->oil.mfcc_origin; | |
808 | sgreq.grp = c_oil->oil.mfcc_mcastgrp; | |
809 | ||
51e82833 | 810 | pim_zlookup_sg_statistics (c_oil); |
3667e8a0 DS |
811 | if (ioctl (qpim_mroute_socket_fd, SIOCGETSGCNT, &sgreq)) |
812 | { | |
c7b1183f DS |
813 | if (PIM_DEBUG_MROUTE) |
814 | { | |
815 | struct prefix_sg sg; | |
816 | ||
817 | sg.src = c_oil->oil.mfcc_origin; | |
818 | sg.grp = c_oil->oil.mfcc_mcastgrp; | |
819 | ||
820 | zlog_warn ("ioctl(SIOCGETSGCNT=%lu) failure for (S,G)=(%s): errno=%d: %s", | |
821 | (unsigned long)SIOCGETSGCNT, | |
822 | pim_str_sg_dump (&sg), | |
823 | errno, | |
824 | safe_strerror(errno)); | |
825 | } | |
3667e8a0 DS |
826 | return; |
827 | } | |
828 | ||
829 | c_oil->cc.pktcnt = sgreq.pktcnt; | |
830 | c_oil->cc.bytecnt = sgreq.bytecnt; | |
831 | c_oil->cc.wrong_if = sgreq.wrong_if; | |
832 | ||
833 | return; | |
834 | } |