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718e3744 | 1 | /* Kernel routing table updates using netlink over GNU/Linux system. |
2 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
e52702f2 | 19 | * 02111-1307, USA. |
718e3744 | 20 | */ |
21 | ||
22 | #include <zebra.h> | |
8ccc7e80 | 23 | #include <net/if_arp.h> |
718e3744 | 24 | |
25 | /* Hack for GNU libc version 2. */ | |
26 | #ifndef MSG_TRUNC | |
27 | #define MSG_TRUNC 0x20 | |
28 | #endif /* MSG_TRUNC */ | |
29 | ||
30 | #include "linklist.h" | |
31 | #include "if.h" | |
32 | #include "log.h" | |
33 | #include "prefix.h" | |
34 | #include "connected.h" | |
35 | #include "table.h" | |
26e2ae36 | 36 | #include "memory.h" |
4a1ab8e4 | 37 | #include "zebra_memory.h" |
718e3744 | 38 | #include "rib.h" |
e04ab74d | 39 | #include "thread.h" |
edd7c245 | 40 | #include "privs.h" |
fb018d25 | 41 | #include "nexthop.h" |
78104b9b | 42 | #include "vrf.h" |
5e6a74d8 | 43 | #include "vty.h" |
40c7bdb0 | 44 | #include "mpls.h" |
718e3744 | 45 | |
46 | #include "zebra/zserv.h" | |
fe18ee2d | 47 | #include "zebra/zebra_ns.h" |
7c551956 | 48 | #include "zebra/zebra_vrf.h" |
6621ca86 | 49 | #include "zebra/rt.h" |
718e3744 | 50 | #include "zebra/redistribute.h" |
51 | #include "zebra/interface.h" | |
52 | #include "zebra/debug.h" | |
12f6fb97 | 53 | #include "zebra/rtadv.h" |
567b877d | 54 | #include "zebra/zebra_ptm.h" |
40c7bdb0 | 55 | #include "zebra/zebra_mpls.h" |
1fdc9eae | 56 | #include "zebra/kernel_netlink.h" |
57 | #include "zebra/rt_netlink.h" | |
e3be0432 DS |
58 | #include "zebra/zebra_mroute.h" |
59 | ||
7021c425 | 60 | |
40c7bdb0 | 61 | /* TODO - Temporary definitions, need to refine. */ |
62 | #ifndef AF_MPLS | |
63 | #define AF_MPLS 28 | |
64 | #endif | |
65 | ||
66 | #ifndef RTA_VIA | |
c0f4be83 | 67 | #define RTA_VIA 18 |
40c7bdb0 | 68 | #endif |
69 | ||
70 | #ifndef RTA_NEWDST | |
71 | #define RTA_NEWDST 19 | |
72 | #endif | |
c0f4be83 | 73 | |
74 | #ifndef RTA_ENCAP_TYPE | |
75 | #define RTA_ENCAP_TYPE 21 | |
76 | #endif | |
77 | ||
78 | #ifndef RTA_ENCAP | |
79 | #define RTA_ENCAP 22 | |
80 | #endif | |
81 | ||
113db945 DS |
82 | #ifndef RTA_EXPIRES |
83 | #define RTA_EXPIRES 23 | |
84 | #endif | |
85 | ||
c0f4be83 | 86 | #ifndef LWTUNNEL_ENCAP_MPLS |
87 | #define LWTUNNEL_ENCAP_MPLS 1 | |
88 | #endif | |
89 | ||
90 | #ifndef MPLS_IPTUNNEL_DST | |
91 | #define MPLS_IPTUNNEL_DST 1 | |
92 | #endif | |
52d8f0d8 DS |
93 | |
94 | #ifndef NDA_MASTER | |
95 | #define NDA_MASTER 9 | |
96 | #endif | |
40c7bdb0 | 97 | /* End of temporary definitions */ |
98 | ||
99 | struct gw_family_t | |
100 | { | |
101 | u_int16_t filler; | |
102 | u_int16_t family; | |
103 | union g_addr gate; | |
104 | }; | |
105 | ||
12f6fb97 DS |
106 | /* |
107 | Pending: create an efficient table_id (in a tree/hash) based lookup) | |
108 | */ | |
109 | static vrf_id_t | |
110 | vrf_lookup_by_table (u_int32_t table_id) | |
111 | { | |
1a1a7065 | 112 | struct vrf *vrf; |
12f6fb97 | 113 | struct zebra_vrf *zvrf; |
12f6fb97 | 114 | |
1a1a7065 | 115 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) |
12f6fb97 | 116 | { |
1a1a7065 | 117 | if ((zvrf = vrf->info) == NULL || |
12f6fb97 DS |
118 | (zvrf->table_id != table_id)) |
119 | continue; | |
120 | ||
661512bf | 121 | return zvrf_id (zvrf); |
12f6fb97 DS |
122 | } |
123 | ||
124 | return VRF_DEFAULT; | |
125 | } | |
126 | ||
718e3744 | 127 | /* Looking up routing table by netlink interface. */ |
6072b24e | 128 | static int |
89a9069a DS |
129 | netlink_route_change_read_unicast (struct sockaddr_nl *snl, struct nlmsghdr *h, |
130 | ns_id_t ns_id, int startup) | |
718e3744 | 131 | { |
132 | int len; | |
133 | struct rtmsg *rtm; | |
7021c425 | 134 | struct rtattr *tb[RTA_MAX + 1]; |
718e3744 | 135 | u_char flags = 0; |
3b1098be | 136 | struct prefix p; |
05737783 | 137 | struct prefix_ipv6 src_p; |
d552ed06 | 138 | vrf_id_t vrf_id = VRF_DEFAULT; |
7021c425 | 139 | |
140 | char anyaddr[16] = { 0 }; | |
718e3744 | 141 | |
05737783 | 142 | int index = 0; |
718e3744 | 143 | int table; |
05737783 | 144 | int metric = 0; |
c50ca33a | 145 | u_int32_t mtu = 0; |
34195bf6 | 146 | |
05737783 CF |
147 | void *dest = NULL; |
148 | void *gate = NULL; | |
149 | void *prefsrc = NULL; /* IPv4 preferred source host address */ | |
150 | void *src = NULL; /* IPv6 srcdest source prefix */ | |
718e3744 | 151 | |
152 | rtm = NLMSG_DATA (h); | |
153 | ||
89a9069a | 154 | if (startup && h->nlmsg_type != RTM_NEWROUTE) |
718e3744 | 155 | return 0; |
89a9069a | 156 | if (startup && rtm->rtm_type != RTN_UNICAST) |
718e3744 | 157 | return 0; |
158 | ||
7021c425 | 159 | len = h->nlmsg_len - NLMSG_LENGTH (sizeof (struct rtmsg)); |
718e3744 | 160 | if (len < 0) |
161 | return -1; | |
162 | ||
163 | memset (tb, 0, sizeof tb); | |
164 | netlink_parse_rtattr (tb, RTA_MAX, RTM_RTA (rtm), len); | |
165 | ||
166 | if (rtm->rtm_flags & RTM_F_CLONED) | |
167 | return 0; | |
168 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
169 | return 0; | |
170 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
171 | return 0; | |
172 | ||
89a9069a DS |
173 | if (!startup && |
174 | rtm->rtm_protocol == RTPROT_ZEBRA && | |
175 | h->nlmsg_type == RTM_NEWROUTE) | |
176 | return 0; | |
177 | ||
40c7bdb0 | 178 | /* We don't care about change notifications for the MPLS table. */ |
179 | /* TODO: Revisit this. */ | |
180 | if (rtm->rtm_family == AF_MPLS) | |
181 | return 0; | |
182 | ||
ca46a78e | 183 | /* Table corresponding to route. */ |
184 | if (tb[RTA_TABLE]) | |
185 | table = *(int *) RTA_DATA (tb[RTA_TABLE]); | |
186 | else | |
187 | table = rtm->rtm_table; | |
188 | ||
189 | /* Map to VRF */ | |
190 | vrf_id = vrf_lookup_by_table(table); | |
191 | if (vrf_id == VRF_DEFAULT) | |
192 | { | |
193 | if (!is_zebra_valid_kernel_table(table) && | |
194 | !is_zebra_main_routing_table(table)) | |
195 | return 0; | |
196 | } | |
197 | ||
718e3744 | 198 | /* Route which inserted by Zebra. */ |
199 | if (rtm->rtm_protocol == RTPROT_ZEBRA) | |
200 | flags |= ZEBRA_FLAG_SELFROUTE; | |
7021c425 | 201 | |
718e3744 | 202 | if (tb[RTA_OIF]) |
203 | index = *(int *) RTA_DATA (tb[RTA_OIF]); | |
204 | ||
205 | if (tb[RTA_DST]) | |
206 | dest = RTA_DATA (tb[RTA_DST]); | |
207 | else | |
208 | dest = anyaddr; | |
209 | ||
05737783 CF |
210 | if (tb[RTA_SRC]) |
211 | src = RTA_DATA (tb[RTA_SRC]); | |
212 | else | |
213 | src = anyaddr; | |
214 | ||
7514fb77 | 215 | if (tb[RTA_PREFSRC]) |
05737783 | 216 | prefsrc = RTA_DATA (tb[RTA_PREFSRC]); |
7514fb77 | 217 | |
718e3744 | 218 | if (tb[RTA_GATEWAY]) |
219 | gate = RTA_DATA (tb[RTA_GATEWAY]); | |
220 | ||
c50ca33a TT |
221 | if (h->nlmsg_type == RTM_NEWROUTE) |
222 | { | |
223 | if (tb[RTA_PRIORITY]) | |
224 | metric = *(int *) RTA_DATA(tb[RTA_PRIORITY]); | |
225 | ||
226 | if (tb[RTA_METRICS]) | |
227 | { | |
228 | struct rtattr *mxrta[RTAX_MAX+1]; | |
229 | ||
230 | memset (mxrta, 0, sizeof mxrta); | |
231 | netlink_parse_rtattr (mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]), | |
232 | RTA_PAYLOAD(tb[RTA_METRICS])); | |
233 | ||
234 | if (mxrta[RTAX_MTU]) | |
235 | mtu = *(u_int32_t *) RTA_DATA(mxrta[RTAX_MTU]); | |
236 | } | |
237 | } | |
26e2ae36 | 238 | |
718e3744 | 239 | if (rtm->rtm_family == AF_INET) |
240 | { | |
718e3744 | 241 | p.family = AF_INET; |
616368ed | 242 | memcpy (&p.u.prefix4, dest, 4); |
718e3744 | 243 | p.prefixlen = rtm->rtm_dst_len; |
a2ca67d1 DS |
244 | } |
245 | else if (rtm->rtm_family == AF_INET6) | |
246 | { | |
247 | p.family = AF_INET6; | |
248 | memcpy (&p.u.prefix6, dest, 16); | |
249 | p.prefixlen = rtm->rtm_dst_len; | |
718e3744 | 250 | |
a2ca67d1 DS |
251 | src_p.family = AF_INET6; |
252 | memcpy (&src_p.prefix, src, 16); | |
253 | src_p.prefixlen = rtm->rtm_src_len; | |
254 | } | |
05737783 | 255 | |
a2ca67d1 DS |
256 | if (rtm->rtm_src_len != 0) |
257 | { | |
258 | char buf[PREFIX_STRLEN]; | |
259 | zlog_warn ("unsupported IPv[4|6] sourcedest route (dest %s vrf %u)", | |
260 | prefix2str (&p, buf, sizeof(buf)), vrf_id); | |
261 | return 0; | |
262 | } | |
263 | ||
264 | if (IS_ZEBRA_DEBUG_KERNEL) | |
265 | { | |
266 | char buf[PREFIX_STRLEN]; | |
267 | char buf2[PREFIX_STRLEN]; | |
268 | zlog_debug ("%s %s%s%s vrf %u", | |
269 | nl_msg_type_to_str (h->nlmsg_type), | |
270 | prefix2str (&p, buf, sizeof(buf)), | |
271 | src_p.prefixlen ? " from " : "", | |
272 | src_p.prefixlen ? prefix2str(&src_p, buf2, sizeof(buf2)) : "", | |
273 | vrf_id); | |
274 | } | |
718e3744 | 275 | |
a2ca67d1 DS |
276 | afi_t afi = AFI_IP; |
277 | if (rtm->rtm_family == AF_INET6) | |
278 | afi = AFI_IP6; | |
279 | ||
280 | if (h->nlmsg_type == RTM_NEWROUTE) | |
281 | { | |
282 | if (!tb[RTA_MULTIPATH]) | |
283 | rib_add (afi, SAFI_UNICAST, vrf_id, ZEBRA_ROUTE_KERNEL, | |
284 | 0, flags, &p, NULL, gate, prefsrc, index, | |
285 | table, metric, mtu, 0); | |
286 | else | |
26e2ae36 | 287 | { |
a2ca67d1 DS |
288 | /* This is a multipath route */ |
289 | ||
290 | struct rib *rib; | |
291 | struct rtnexthop *rtnh = | |
292 | (struct rtnexthop *) RTA_DATA (tb[RTA_MULTIPATH]); | |
293 | ||
294 | len = RTA_PAYLOAD (tb[RTA_MULTIPATH]); | |
295 | ||
296 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); | |
297 | rib->type = ZEBRA_ROUTE_KERNEL; | |
298 | rib->distance = 0; | |
299 | rib->flags = flags; | |
300 | rib->metric = metric; | |
301 | rib->mtu = mtu; | |
302 | rib->vrf_id = vrf_id; | |
303 | rib->table = table; | |
304 | rib->nexthop_num = 0; | |
305 | rib->uptime = time (NULL); | |
306 | ||
307 | for (;;) | |
26e2ae36 | 308 | { |
a2ca67d1 DS |
309 | if (len < (int) sizeof (*rtnh) || rtnh->rtnh_len > len) |
310 | break; | |
26e2ae36 | 311 | |
a2ca67d1 DS |
312 | index = rtnh->rtnh_ifindex; |
313 | gate = 0; | |
314 | if (rtnh->rtnh_len > sizeof (*rtnh)) | |
315 | { | |
316 | memset (tb, 0, sizeof (tb)); | |
317 | netlink_parse_rtattr (tb, RTA_MAX, RTNH_DATA (rtnh), | |
318 | rtnh->rtnh_len - sizeof (*rtnh)); | |
319 | if (tb[RTA_GATEWAY]) | |
320 | gate = RTA_DATA (tb[RTA_GATEWAY]); | |
321 | } | |
26e2ae36 | 322 | |
a2ca67d1 DS |
323 | if (gate) |
324 | { | |
325 | if (rtm->rtm_family == AF_INET) | |
26e2ae36 JB |
326 | { |
327 | if (index) | |
05737783 | 328 | rib_nexthop_ipv4_ifindex_add (rib, gate, prefsrc, index); |
26e2ae36 | 329 | else |
05737783 | 330 | rib_nexthop_ipv4_add (rib, gate, prefsrc); |
26e2ae36 | 331 | } |
a2ca67d1 DS |
332 | else if (rtm->rtm_family == AF_INET6) |
333 | { | |
334 | if (index) | |
335 | rib_nexthop_ipv6_ifindex_add (rib, gate, index); | |
336 | else | |
337 | rib_nexthop_ipv6_add (rib,gate); | |
338 | } | |
1fdc9eae | 339 | } |
1fdc9eae | 340 | else |
a2ca67d1 | 341 | rib_nexthop_ifindex_add (rib, index); |
26e2ae36 | 342 | |
a2ca67d1 DS |
343 | len -= NLMSG_ALIGN(rtnh->rtnh_len); |
344 | rtnh = RTNH_NEXT(rtnh); | |
345 | } | |
05737783 | 346 | |
a2ca67d1 DS |
347 | zserv_nexthop_num_warn(__func__, (const struct prefix *)&p, |
348 | rib->nexthop_num); | |
349 | if (rib->nexthop_num == 0) | |
350 | XFREE (MTYPE_RIB, rib); | |
351 | else | |
352 | rib_add_multipath (AFI_IP, SAFI_UNICAST, &p, NULL, rib); | |
7021c425 | 353 | } |
718e3744 | 354 | } |
a2ca67d1 | 355 | else |
2f8685a2 DS |
356 | { |
357 | if (!tb[RTA_MULTIPATH]) | |
358 | rib_delete (afi, SAFI_UNICAST, vrf_id, ZEBRA_ROUTE_KERNEL, 0, flags, | |
359 | &p, NULL, gate, index, table); | |
360 | else | |
361 | { | |
362 | struct rtnexthop *rtnh = | |
363 | (struct rtnexthop *) RTA_DATA (tb[RTA_MULTIPATH]); | |
364 | ||
365 | len = RTA_PAYLOAD (tb[RTA_MULTIPATH]); | |
366 | ||
367 | for (;;) | |
368 | { | |
369 | if (len < (int) sizeof (*rtnh) || rtnh->rtnh_len > len) | |
370 | break; | |
371 | ||
372 | gate = NULL; | |
373 | if (rtnh->rtnh_len > sizeof (*rtnh)) | |
374 | { | |
375 | memset (tb, 0, sizeof (tb)); | |
376 | netlink_parse_rtattr (tb, RTA_MAX, RTNH_DATA (rtnh), | |
377 | rtnh->rtnh_len - sizeof (*rtnh)); | |
378 | if (tb[RTA_GATEWAY]) | |
379 | gate = RTA_DATA (tb[RTA_GATEWAY]); | |
380 | } | |
381 | ||
382 | if (gate) | |
383 | rib_delete (afi, SAFI_UNICAST, vrf_id, ZEBRA_ROUTE_KERNEL, 0, flags, | |
384 | &p, NULL, gate, index, table); | |
385 | ||
386 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
387 | rtnh = RTNH_NEXT(rtnh); | |
388 | } | |
389 | } | |
390 | } | |
718e3744 | 391 | |
392 | return 0; | |
393 | } | |
394 | ||
e3be0432 DS |
395 | static struct mcast_route_data *mroute = NULL; |
396 | ||
565fdc75 DS |
397 | static int |
398 | netlink_route_change_read_multicast (struct sockaddr_nl *snl, struct nlmsghdr *h, | |
936ebf0a | 399 | ns_id_t ns_id, int startup) |
565fdc75 DS |
400 | { |
401 | int len; | |
402 | struct rtmsg *rtm; | |
403 | struct rtattr *tb[RTA_MAX + 1]; | |
e3be0432 DS |
404 | struct mcast_route_data *m; |
405 | struct mcast_route_data mr; | |
90d82769 DS |
406 | int iif = 0; |
407 | int count; | |
408 | int oif[256]; | |
409 | int oif_count = 0; | |
410 | char sbuf[40]; | |
411 | char gbuf[40]; | |
412 | char oif_list[256] = "\0"; | |
90d82769 | 413 | vrf_id_t vrf = ns_id; |
565fdc75 | 414 | |
e3be0432 DS |
415 | if (mroute) |
416 | m = mroute; | |
417 | else | |
f0242f68 DS |
418 | { |
419 | memset (&mr, 0, sizeof (mr)); | |
420 | m = &mr; | |
421 | } | |
e3be0432 | 422 | |
565fdc75 DS |
423 | rtm = NLMSG_DATA (h); |
424 | ||
425 | len = h->nlmsg_len - NLMSG_LENGTH (sizeof (struct rtmsg)); | |
426 | ||
427 | memset (tb, 0, sizeof tb); | |
428 | netlink_parse_rtattr (tb, RTA_MAX, RTM_RTA (rtm), len); | |
429 | ||
90d82769 DS |
430 | if (tb[RTA_IIF]) |
431 | iif = *(int *)RTA_DATA (tb[RTA_IIF]); | |
432 | ||
433 | if (tb[RTA_SRC]) | |
e3be0432 | 434 | m->sg.src = *(struct in_addr *)RTA_DATA (tb[RTA_SRC]); |
90d82769 DS |
435 | |
436 | if (tb[RTA_DST]) | |
e3be0432 | 437 | m->sg.grp = *(struct in_addr *)RTA_DATA (tb[RTA_DST]); |
90d82769 | 438 | |
113db945 | 439 | if ((RTA_EXPIRES <= RTA_MAX) && tb[RTA_EXPIRES]) |
e3be0432 | 440 | m->lastused = *(unsigned long long *)RTA_DATA (tb[RTA_EXPIRES]); |
90d82769 DS |
441 | |
442 | if (tb[RTA_MULTIPATH]) | |
443 | { | |
444 | struct rtnexthop *rtnh = | |
445 | (struct rtnexthop *)RTA_DATA (tb[RTA_MULTIPATH]); | |
446 | ||
447 | len = RTA_PAYLOAD (tb[RTA_MULTIPATH]); | |
448 | for (;;) | |
449 | { | |
450 | if (len < (int) sizeof (*rtnh) || rtnh->rtnh_len > len) | |
451 | break; | |
452 | ||
453 | oif[oif_count] = rtnh->rtnh_ifindex; | |
454 | oif_count++; | |
455 | ||
456 | len -= NLMSG_ALIGN (rtnh->rtnh_len); | |
457 | rtnh = RTNH_NEXT (rtnh); | |
458 | } | |
459 | } | |
460 | ||
461 | if (IS_ZEBRA_DEBUG_KERNEL) | |
462 | { | |
82d64e8e | 463 | struct interface *ifp; |
e3be0432 DS |
464 | strcpy (sbuf, inet_ntoa (m->sg.src)); |
465 | strcpy (gbuf, inet_ntoa (m->sg.grp)); | |
90d82769 DS |
466 | for (count = 0; count < oif_count; count++) |
467 | { | |
7e2b7603 | 468 | ifp = if_lookup_by_index (oif[count], vrf); |
90d82769 DS |
469 | char temp[256]; |
470 | ||
471 | sprintf (temp, "%s ", ifp->name); | |
472 | strcat (oif_list, temp); | |
473 | } | |
7e2b7603 | 474 | ifp = if_lookup_by_index (iif, vrf); |
82d64e8e DS |
475 | zlog_debug ("MCAST %s (%s,%s) IIF: %s OIF: %s jiffies: %lld", |
476 | nl_msg_type_to_str(h->nlmsg_type), sbuf, gbuf, ifp->name, oif_list, m->lastused); | |
90d82769 | 477 | } |
565fdc75 DS |
478 | return 0; |
479 | } | |
480 | ||
481 | int | |
482 | netlink_route_change (struct sockaddr_nl *snl, struct nlmsghdr *h, | |
936ebf0a | 483 | ns_id_t ns_id, int startup) |
565fdc75 DS |
484 | { |
485 | int len; | |
486 | vrf_id_t vrf_id = ns_id; | |
487 | struct rtmsg *rtm; | |
488 | ||
489 | rtm = NLMSG_DATA (h); | |
490 | ||
491 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) | |
492 | { | |
493 | /* If this is not route add/delete message print warning. */ | |
494 | zlog_warn ("Kernel message: %d vrf %u\n", h->nlmsg_type, vrf_id); | |
495 | return 0; | |
496 | } | |
497 | ||
498 | /* Connected route. */ | |
499 | if (IS_ZEBRA_DEBUG_KERNEL) | |
500 | zlog_debug ("%s %s %s proto %s vrf %u", | |
90d82769 DS |
501 | nl_msg_type_to_str (h->nlmsg_type), |
502 | nl_family_to_str (rtm->rtm_family), | |
503 | nl_rttype_to_str (rtm->rtm_type), | |
565fdc75 | 504 | nl_rtproto_to_str (rtm->rtm_protocol), |
90d82769 | 505 | vrf_id); |
565fdc75 DS |
506 | |
507 | /* We don't care about change notifications for the MPLS table. */ | |
508 | /* TODO: Revisit this. */ | |
509 | if (rtm->rtm_family == AF_MPLS) | |
510 | return 0; | |
511 | ||
512 | len = h->nlmsg_len - NLMSG_LENGTH (sizeof (struct rtmsg)); | |
513 | if (len < 0) | |
514 | return -1; | |
515 | ||
516 | switch (rtm->rtm_type) | |
517 | { | |
518 | case RTN_UNICAST: | |
936ebf0a | 519 | netlink_route_change_read_unicast (snl, h, ns_id, startup); |
565fdc75 DS |
520 | break; |
521 | case RTN_MULTICAST: | |
936ebf0a | 522 | netlink_route_change_read_multicast (snl, h, ns_id, startup); |
565fdc75 DS |
523 | break; |
524 | default: | |
525 | return 0; | |
526 | break; | |
527 | } | |
528 | ||
529 | return 0; | |
530 | } | |
531 | ||
718e3744 | 532 | /* Routing table read function using netlink interface. Only called |
533 | bootstrap time. */ | |
534 | int | |
12f6fb97 | 535 | netlink_route_read (struct zebra_ns *zns) |
718e3744 | 536 | { |
537 | int ret; | |
7021c425 | 538 | |
718e3744 | 539 | /* Get IPv4 routing table. */ |
12f6fb97 | 540 | ret = netlink_request (AF_INET, RTM_GETROUTE, &zns->netlink_cmd); |
718e3744 | 541 | if (ret < 0) |
542 | return ret; | |
89a9069a | 543 | ret = netlink_parse_info (netlink_route_change_read_unicast, &zns->netlink_cmd, zns, 0, 1); |
718e3744 | 544 | if (ret < 0) |
545 | return ret; | |
546 | ||
718e3744 | 547 | /* Get IPv6 routing table. */ |
12f6fb97 | 548 | ret = netlink_request (AF_INET6, RTM_GETROUTE, &zns->netlink_cmd); |
718e3744 | 549 | if (ret < 0) |
550 | return ret; | |
89a9069a | 551 | ret = netlink_parse_info (netlink_route_change_read_unicast, &zns->netlink_cmd, zns, 0, 1); |
718e3744 | 552 | if (ret < 0) |
553 | return ret; | |
718e3744 | 554 | |
555 | return 0; | |
556 | } | |
557 | ||
40c7bdb0 | 558 | static void |
559 | _netlink_route_nl_add_gateway_info (u_char route_family, u_char gw_family, | |
560 | struct nlmsghdr *nlmsg, | |
561 | size_t req_size, int bytelen, | |
562 | struct nexthop *nexthop) | |
563 | { | |
564 | if (route_family == AF_MPLS) | |
565 | { | |
566 | struct gw_family_t gw_fam; | |
567 | ||
568 | gw_fam.family = gw_family; | |
569 | if (gw_family == AF_INET) | |
570 | memcpy (&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
571 | else | |
572 | memcpy (&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
573 | addattr_l (nlmsg, req_size, RTA_VIA, &gw_fam.family, bytelen+2); | |
574 | } | |
575 | else | |
576 | { | |
577 | if (gw_family == AF_INET) | |
578 | addattr_l (nlmsg, req_size, RTA_GATEWAY, &nexthop->gate.ipv4, bytelen); | |
579 | else | |
580 | addattr_l (nlmsg, req_size, RTA_GATEWAY, &nexthop->gate.ipv6, bytelen); | |
581 | } | |
582 | } | |
583 | ||
584 | static void | |
585 | _netlink_route_rta_add_gateway_info (u_char route_family, u_char gw_family, | |
586 | struct rtattr *rta, struct rtnexthop *rtnh, | |
587 | size_t req_size, int bytelen, | |
588 | struct nexthop *nexthop) | |
589 | { | |
590 | if (route_family == AF_MPLS) | |
591 | { | |
592 | struct gw_family_t gw_fam; | |
593 | ||
594 | gw_fam.family = gw_family; | |
595 | if (gw_family == AF_INET) | |
596 | memcpy (&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
597 | else | |
598 | memcpy (&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
599 | rta_addattr_l (rta, req_size, RTA_VIA, &gw_fam.family, bytelen+2); | |
600 | rtnh->rtnh_len += RTA_LENGTH (bytelen + 2); | |
601 | } | |
602 | else | |
603 | { | |
604 | if (gw_family == AF_INET) | |
605 | rta_addattr_l (rta, req_size, RTA_GATEWAY, &nexthop->gate.ipv4, bytelen); | |
606 | else | |
607 | rta_addattr_l (rta, req_size, RTA_GATEWAY, &nexthop->gate.ipv6, bytelen); | |
608 | rtnh->rtnh_len += sizeof (struct rtattr) + bytelen; | |
609 | } | |
610 | } | |
611 | ||
fa713d9e CF |
612 | /* This function takes a nexthop as argument and adds |
613 | * the appropriate netlink attributes to an existing | |
614 | * netlink message. | |
615 | * | |
616 | * @param routedesc: Human readable description of route type | |
617 | * (direct/recursive, single-/multipath) | |
618 | * @param bytelen: Length of addresses in bytes. | |
619 | * @param nexthop: Nexthop information | |
620 | * @param nlmsg: nlmsghdr structure to fill in. | |
621 | * @param req_size: The size allocated for the message. | |
622 | */ | |
623 | static void | |
624 | _netlink_route_build_singlepath( | |
625 | const char *routedesc, | |
626 | int bytelen, | |
627 | struct nexthop *nexthop, | |
628 | struct nlmsghdr *nlmsg, | |
e8d3d299 | 629 | struct rtmsg *rtmsg, |
c52ef59f DS |
630 | size_t req_size, |
631 | int cmd) | |
fa713d9e | 632 | { |
c0f4be83 | 633 | struct nexthop_label *nh_label; |
634 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; | |
40c7bdb0 | 635 | char label_buf[100]; |
5c610faf DS |
636 | |
637 | if (rtmsg->rtm_family == AF_INET && | |
638 | (nexthop->type == NEXTHOP_TYPE_IPV6 | |
5c610faf DS |
639 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) |
640 | { | |
641 | char buf[16] = "169.254.0.1"; | |
642 | struct in_addr ipv4_ll; | |
643 | ||
644 | inet_pton (AF_INET, buf, &ipv4_ll); | |
645 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
646 | addattr_l (nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4); | |
647 | addattr32 (nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
648 | ||
fb5d585c | 649 | if (nexthop->rmap_src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) |
650 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
651 | &nexthop->rmap_src.ipv4, bytelen); | |
652 | else if (nexthop->src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
653 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
654 | &nexthop->src.ipv4, bytelen); | |
655 | ||
5c610faf DS |
656 | if (IS_ZEBRA_DEBUG_KERNEL) |
657 | zlog_debug(" 5549: _netlink_route_build_singlepath() (%s): " | |
658 | "nexthop via %s if %u", | |
659 | routedesc, buf, nexthop->ifindex); | |
660 | return; | |
661 | } | |
662 | ||
40c7bdb0 | 663 | label_buf[0] = '\0'; |
c0f4be83 | 664 | /* outgoing label - either as NEWDST (in the case of LSR) or as ENCAP |
665 | * (in the case of LER) | |
666 | */ | |
667 | nh_label = nexthop->nh_label; | |
40c7bdb0 | 668 | if (rtmsg->rtm_family == AF_MPLS) |
669 | { | |
c0f4be83 | 670 | assert (nh_label); |
671 | assert (nh_label->num_labels == 1); | |
672 | } | |
40c7bdb0 | 673 | |
c0f4be83 | 674 | if (nh_label && nh_label->num_labels) |
675 | { | |
676 | int i, num_labels = 0; | |
677 | u_int32_t bos; | |
678 | char label_buf1[20]; | |
e52702f2 | 679 | |
c0f4be83 | 680 | for (i = 0; i < nh_label->num_labels; i++) |
40c7bdb0 | 681 | { |
c0f4be83 | 682 | if (nh_label->label[i] != MPLS_IMP_NULL_LABEL) |
683 | { | |
684 | bos = ((i == (nh_label->num_labels - 1)) ? 1 : 0); | |
685 | out_lse[i] = mpls_lse_encode (nh_label->label[i], 0, 0, bos); | |
686 | if (!num_labels) | |
687 | sprintf (label_buf, "label %d", nh_label->label[i]); | |
688 | else | |
689 | { | |
690 | sprintf (label_buf1, "/%d", nh_label->label[i]); | |
691 | strcat (label_buf, label_buf1); | |
692 | } | |
693 | num_labels++; | |
694 | } | |
695 | } | |
696 | if (num_labels) | |
697 | { | |
698 | if (rtmsg->rtm_family == AF_MPLS) | |
699 | addattr_l (nlmsg, req_size, RTA_NEWDST, | |
700 | &out_lse, num_labels * sizeof(mpls_lse_t)); | |
701 | else | |
702 | { | |
703 | struct rtattr *nest; | |
704 | u_int16_t encap = LWTUNNEL_ENCAP_MPLS; | |
705 | ||
706 | addattr_l(nlmsg, req_size, RTA_ENCAP_TYPE, | |
707 | &encap, sizeof (u_int16_t)); | |
708 | nest = addattr_nest(nlmsg, req_size, RTA_ENCAP); | |
709 | addattr_l (nlmsg, req_size, MPLS_IPTUNNEL_DST, | |
710 | &out_lse, num_labels * sizeof(mpls_lse_t)); | |
711 | addattr_nest_end(nlmsg, nest); | |
712 | } | |
40c7bdb0 | 713 | } |
714 | } | |
715 | ||
e8d3d299 CF |
716 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
717 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
5c610faf | 718 | |
fa713d9e CF |
719 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
720 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) | |
721 | { | |
659b52a8 DS |
722 | /* Send deletes to the kernel without specifying the next-hop */ |
723 | if (cmd != RTM_DELROUTE) | |
724 | _netlink_route_nl_add_gateway_info (rtmsg->rtm_family, AF_INET, nlmsg, | |
725 | req_size, bytelen, nexthop); | |
c52ef59f | 726 | |
0aabccc0 DD |
727 | if (cmd == RTM_NEWROUTE) |
728 | { | |
729 | if (nexthop->rmap_src.ipv4.s_addr) | |
730 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
731 | &nexthop->rmap_src.ipv4, bytelen); | |
732 | else if (nexthop->src.ipv4.s_addr) | |
733 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
734 | &nexthop->src.ipv4, bytelen); | |
735 | } | |
fa713d9e CF |
736 | |
737 | if (IS_ZEBRA_DEBUG_KERNEL) | |
738 | zlog_debug("netlink_route_multipath() (%s): " | |
40c7bdb0 | 739 | "nexthop via %s %s if %u", |
fa713d9e CF |
740 | routedesc, |
741 | inet_ntoa (nexthop->gate.ipv4), | |
40c7bdb0 | 742 | label_buf, nexthop->ifindex); |
fa713d9e | 743 | } |
fa713d9e | 744 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
fa713d9e CF |
745 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
746 | { | |
40c7bdb0 | 747 | _netlink_route_nl_add_gateway_info (rtmsg->rtm_family, AF_INET6, nlmsg, |
748 | req_size, bytelen, nexthop); | |
fa713d9e | 749 | |
0aabccc0 DD |
750 | if (cmd == RTM_NEWROUTE) |
751 | { | |
752 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
753 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
754 | &nexthop->rmap_src.ipv6, bytelen); | |
755 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
756 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
757 | &nexthop->src.ipv6, bytelen); | |
758 | } | |
759 | ||
fa713d9e CF |
760 | if (IS_ZEBRA_DEBUG_KERNEL) |
761 | zlog_debug("netlink_route_multipath() (%s): " | |
40c7bdb0 | 762 | "nexthop via %s %s if %u", |
fa713d9e CF |
763 | routedesc, |
764 | inet6_ntoa (nexthop->gate.ipv6), | |
40c7bdb0 | 765 | label_buf, nexthop->ifindex); |
fa713d9e | 766 | } |
fa713d9e | 767 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX |
fa713d9e CF |
768 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
769 | { | |
770 | addattr32 (nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
771 | ||
0aabccc0 DD |
772 | if (cmd == RTM_NEWROUTE) |
773 | { | |
774 | if (nexthop->rmap_src.ipv4.s_addr) | |
775 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
776 | &nexthop->rmap_src.ipv4, bytelen); | |
777 | else if (nexthop->src.ipv4.s_addr) | |
778 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
779 | &nexthop->src.ipv4, bytelen); | |
780 | } | |
fa713d9e CF |
781 | |
782 | if (IS_ZEBRA_DEBUG_KERNEL) | |
783 | zlog_debug("netlink_route_multipath() (%s): " | |
784 | "nexthop via if %u", routedesc, nexthop->ifindex); | |
785 | } | |
786 | ||
3ee39b5b | 787 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
fa713d9e CF |
788 | { |
789 | addattr32 (nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
790 | ||
0aabccc0 DD |
791 | if (cmd == RTM_NEWROUTE) |
792 | { | |
793 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
794 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
795 | &nexthop->rmap_src.ipv6, bytelen); | |
796 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
797 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
798 | &nexthop->src.ipv6, bytelen); | |
799 | } | |
800 | ||
fa713d9e CF |
801 | if (IS_ZEBRA_DEBUG_KERNEL) |
802 | zlog_debug("netlink_route_multipath() (%s): " | |
803 | "nexthop via if %u", routedesc, nexthop->ifindex); | |
804 | } | |
805 | } | |
806 | ||
807 | /* This function takes a nexthop as argument and | |
808 | * appends to the given rtattr/rtnexthop pair the | |
809 | * representation of the nexthop. If the nexthop | |
810 | * defines a preferred source, the src parameter | |
811 | * will be modified to point to that src, otherwise | |
812 | * it will be kept unmodified. | |
813 | * | |
814 | * @param routedesc: Human readable description of route type | |
815 | * (direct/recursive, single-/multipath) | |
816 | * @param bytelen: Length of addresses in bytes. | |
817 | * @param nexthop: Nexthop information | |
818 | * @param rta: rtnetlink attribute structure | |
819 | * @param rtnh: pointer to an rtnetlink nexthop structure | |
820 | * @param src: pointer pointing to a location where | |
821 | * the prefsrc should be stored. | |
822 | */ | |
823 | static void | |
824 | _netlink_route_build_multipath( | |
825 | const char *routedesc, | |
826 | int bytelen, | |
827 | struct nexthop *nexthop, | |
828 | struct rtattr *rta, | |
829 | struct rtnexthop *rtnh, | |
5c610faf DS |
830 | struct rtmsg *rtmsg, |
831 | union g_addr **src) | |
fa713d9e | 832 | { |
c0f4be83 | 833 | struct nexthop_label *nh_label; |
834 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; | |
40c7bdb0 | 835 | char label_buf[100]; |
836 | ||
fa713d9e CF |
837 | rtnh->rtnh_len = sizeof (*rtnh); |
838 | rtnh->rtnh_flags = 0; | |
839 | rtnh->rtnh_hops = 0; | |
840 | rta->rta_len += rtnh->rtnh_len; | |
841 | ||
5c610faf DS |
842 | if (rtmsg->rtm_family == AF_INET && |
843 | (nexthop->type == NEXTHOP_TYPE_IPV6 | |
5c610faf DS |
844 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) |
845 | { | |
846 | char buf[16] = "169.254.0.1"; | |
847 | struct in_addr ipv4_ll; | |
848 | ||
849 | inet_pton (AF_INET, buf, &ipv4_ll); | |
850 | bytelen = 4; | |
851 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
852 | rta_addattr_l (rta, NL_PKT_BUF_SIZE, RTA_GATEWAY, | |
853 | &ipv4_ll, bytelen); | |
854 | rtnh->rtnh_len += sizeof (struct rtattr) + bytelen; | |
855 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
856 | ||
fb5d585c | 857 | if (nexthop->rmap_src.ipv4.s_addr) |
858 | *src = &nexthop->rmap_src; | |
859 | else if (nexthop->src.ipv4.s_addr) | |
860 | *src = &nexthop->src; | |
861 | ||
5c610faf DS |
862 | if (IS_ZEBRA_DEBUG_KERNEL) |
863 | zlog_debug(" 5549: netlink_route_build_multipath() (%s): " | |
864 | "nexthop via %s if %u", | |
865 | routedesc, buf, nexthop->ifindex); | |
866 | return; | |
867 | } | |
868 | ||
40c7bdb0 | 869 | label_buf[0] = '\0'; |
c0f4be83 | 870 | /* outgoing label - either as NEWDST (in the case of LSR) or as ENCAP |
871 | * (in the case of LER) | |
872 | */ | |
873 | nh_label = nexthop->nh_label; | |
40c7bdb0 | 874 | if (rtmsg->rtm_family == AF_MPLS) |
875 | { | |
c0f4be83 | 876 | assert (nh_label); |
877 | assert (nh_label->num_labels == 1); | |
878 | } | |
879 | ||
880 | if (nh_label && nh_label->num_labels) | |
881 | { | |
882 | int i, num_labels = 0; | |
883 | u_int32_t bos; | |
884 | char label_buf1[20]; | |
40c7bdb0 | 885 | |
c0f4be83 | 886 | for (i = 0; i < nh_label->num_labels; i++) |
40c7bdb0 | 887 | { |
c0f4be83 | 888 | if (nh_label->label[i] != MPLS_IMP_NULL_LABEL) |
889 | { | |
890 | bos = ((i == (nh_label->num_labels - 1)) ? 1 : 0); | |
891 | out_lse[i] = mpls_lse_encode (nh_label->label[i], 0, 0, bos); | |
892 | if (!num_labels) | |
893 | sprintf (label_buf, "label %d", nh_label->label[i]); | |
894 | else | |
895 | { | |
896 | sprintf (label_buf1, "/%d", nh_label->label[i]); | |
897 | strcat (label_buf, label_buf1); | |
898 | } | |
899 | num_labels++; | |
900 | } | |
901 | } | |
902 | if (num_labels) | |
903 | { | |
904 | if (rtmsg->rtm_family == AF_MPLS) | |
905 | { | |
906 | rta_addattr_l (rta, NL_PKT_BUF_SIZE, RTA_NEWDST, | |
907 | &out_lse, num_labels * sizeof(mpls_lse_t)); | |
908 | rtnh->rtnh_len += RTA_LENGTH (num_labels * sizeof(mpls_lse_t)); | |
909 | } | |
910 | else | |
911 | { | |
912 | struct rtattr *nest; | |
913 | u_int16_t encap = LWTUNNEL_ENCAP_MPLS; | |
914 | int len = rta->rta_len; | |
915 | ||
916 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_ENCAP_TYPE, | |
917 | &encap, sizeof (u_int16_t)); | |
918 | nest = rta_nest(rta, NL_PKT_BUF_SIZE, RTA_ENCAP); | |
919 | rta_addattr_l (rta, NL_PKT_BUF_SIZE, MPLS_IPTUNNEL_DST, | |
920 | &out_lse, num_labels * sizeof(mpls_lse_t)); | |
921 | rta_nest_end(rta, nest); | |
922 | rtnh->rtnh_len += rta->rta_len - len; | |
923 | } | |
40c7bdb0 | 924 | } |
925 | } | |
5c610faf | 926 | |
e8d3d299 CF |
927 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
928 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
929 | ||
fa713d9e CF |
930 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
931 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) | |
932 | { | |
40c7bdb0 | 933 | _netlink_route_rta_add_gateway_info (rtmsg->rtm_family, AF_INET, rta, |
934 | rtnh, NL_PKT_BUF_SIZE, bytelen, nexthop); | |
c52ef59f DS |
935 | if (nexthop->rmap_src.ipv4.s_addr) |
936 | *src = &nexthop->rmap_src; | |
937 | else if (nexthop->src.ipv4.s_addr) | |
938 | *src = &nexthop->src; | |
fa713d9e CF |
939 | |
940 | if (IS_ZEBRA_DEBUG_KERNEL) | |
941 | zlog_debug("netlink_route_multipath() (%s): " | |
40c7bdb0 | 942 | "nexthop via %s %s if %u", |
fa713d9e CF |
943 | routedesc, |
944 | inet_ntoa (nexthop->gate.ipv4), | |
40c7bdb0 | 945 | label_buf, nexthop->ifindex); |
fa713d9e | 946 | } |
fa713d9e | 947 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
fa713d9e CF |
948 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
949 | { | |
40c7bdb0 | 950 | _netlink_route_rta_add_gateway_info (rtmsg->rtm_family, AF_INET6, rta, |
951 | rtnh, NL_PKT_BUF_SIZE, bytelen, nexthop); | |
0aabccc0 DD |
952 | |
953 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
954 | *src = &nexthop->rmap_src; | |
955 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
956 | *src = &nexthop->src; | |
957 | ||
fa713d9e CF |
958 | if (IS_ZEBRA_DEBUG_KERNEL) |
959 | zlog_debug("netlink_route_multipath() (%s): " | |
40c7bdb0 | 960 | "nexthop via %s %s if %u", |
fa713d9e CF |
961 | routedesc, |
962 | inet6_ntoa (nexthop->gate.ipv6), | |
40c7bdb0 | 963 | label_buf, nexthop->ifindex); |
fa713d9e | 964 | } |
fa713d9e CF |
965 | /* ifindex */ |
966 | if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
3ee39b5b | 967 | || nexthop->type == NEXTHOP_TYPE_IFINDEX) |
fa713d9e CF |
968 | { |
969 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
c52ef59f DS |
970 | |
971 | if (nexthop->rmap_src.ipv4.s_addr) | |
972 | *src = &nexthop->rmap_src; | |
973 | else if (nexthop->src.ipv4.s_addr) | |
fa713d9e | 974 | *src = &nexthop->src; |
c52ef59f | 975 | |
fa713d9e CF |
976 | if (IS_ZEBRA_DEBUG_KERNEL) |
977 | zlog_debug("netlink_route_multipath() (%s): " | |
978 | "nexthop via if %u", routedesc, nexthop->ifindex); | |
979 | } | |
3ee39b5b | 980 | else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
fa713d9e CF |
981 | { |
982 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
983 | ||
984 | if (IS_ZEBRA_DEBUG_KERNEL) | |
985 | zlog_debug("netlink_route_multipath() (%s): " | |
986 | "nexthop via if %u", routedesc, nexthop->ifindex); | |
987 | } | |
988 | else | |
989 | { | |
990 | rtnh->rtnh_ifindex = 0; | |
991 | } | |
992 | } | |
993 | ||
40c7bdb0 | 994 | static inline void |
995 | _netlink_mpls_build_singlepath( | |
996 | const char *routedesc, | |
997 | zebra_nhlfe_t *nhlfe, | |
998 | struct nlmsghdr *nlmsg, | |
999 | struct rtmsg *rtmsg, | |
1000 | size_t req_size, | |
1001 | int cmd) | |
1002 | { | |
1003 | int bytelen; | |
1004 | u_char family; | |
1005 | ||
1006 | family = NHLFE_FAMILY (nhlfe); | |
1007 | bytelen = (family == AF_INET ? 4 : 16); | |
1008 | _netlink_route_build_singlepath(routedesc, bytelen, nhlfe->nexthop, | |
1009 | nlmsg, rtmsg, req_size, cmd); | |
1010 | } | |
1011 | ||
1012 | ||
1013 | static inline void | |
1014 | _netlink_mpls_build_multipath( | |
1015 | const char *routedesc, | |
1016 | zebra_nhlfe_t *nhlfe, | |
1017 | struct rtattr *rta, | |
1018 | struct rtnexthop *rtnh, | |
1019 | struct rtmsg *rtmsg, | |
1020 | union g_addr **src) | |
1021 | { | |
1022 | int bytelen; | |
1023 | u_char family; | |
1024 | ||
1025 | family = NHLFE_FAMILY (nhlfe); | |
1026 | bytelen = (family == AF_INET ? 4 : 16); | |
1027 | _netlink_route_build_multipath(routedesc, bytelen, nhlfe->nexthop, | |
1028 | rta, rtnh, rtmsg, src); | |
1029 | } | |
1030 | ||
1031 | ||
fa713d9e CF |
1032 | /* Log debug information for netlink_route_multipath |
1033 | * if debug logging is enabled. | |
1034 | * | |
1035 | * @param cmd: Netlink command which is to be processed | |
1036 | * @param p: Prefix for which the change is due | |
1037 | * @param nexthop: Nexthop which is currently processed | |
1038 | * @param routedesc: Semantic annotation for nexthop | |
1039 | * (recursive, multipath, etc.) | |
1040 | * @param family: Address family which the change concerns | |
1041 | */ | |
1042 | static void | |
1043 | _netlink_route_debug( | |
1044 | int cmd, | |
1045 | struct prefix *p, | |
1046 | struct nexthop *nexthop, | |
1047 | const char *routedesc, | |
8f7d9fc0 FL |
1048 | int family, |
1049 | struct zebra_vrf *zvrf) | |
fa713d9e CF |
1050 | { |
1051 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1052 | { | |
35d921cc TT |
1053 | char buf[PREFIX_STRLEN]; |
1054 | zlog_debug ("netlink_route_multipath() (%s): %s %s vrf %u type %s", | |
1055 | routedesc, | |
1fdc9eae | 1056 | nl_msg_type_to_str (cmd), |
661512bf | 1057 | prefix2str (p, buf, sizeof(buf)), zvrf_id (zvrf), |
40c7bdb0 | 1058 | (nexthop) ? nexthop_type_to_str (nexthop->type) : "UNK"); |
fa713d9e | 1059 | } |
e52702f2 | 1060 | } |
fa713d9e | 1061 | |
40c7bdb0 | 1062 | static void |
1063 | _netlink_mpls_debug( | |
1064 | int cmd, | |
1065 | u_int32_t label, | |
1066 | const char *routedesc) | |
1067 | { | |
1068 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1069 | zlog_debug ("netlink_mpls_multipath() (%s): %s %u/20", | |
1fdc9eae | 1070 | routedesc, nl_msg_type_to_str (cmd), label); |
fa713d9e CF |
1071 | } |
1072 | ||
6b8a5694 | 1073 | static int |
1bb6e9b7 | 1074 | netlink_neigh_update (int cmd, int ifindex, uint32_t addr, char *lla, int llalen) |
5c610faf DS |
1075 | { |
1076 | struct { | |
1077 | struct nlmsghdr n; | |
1078 | struct ndmsg ndm; | |
1079 | char buf[256]; | |
1080 | } req; | |
1081 | ||
fe18ee2d | 1082 | struct zebra_ns *zns = zebra_ns_lookup (NS_DEFAULT); |
8f7d9fc0 | 1083 | |
5c610faf DS |
1084 | memset(&req.n, 0, sizeof(req.n)); |
1085 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1086 | ||
1087 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1088 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1089 | req.n.nlmsg_type = cmd; //RTM_NEWNEIGH or RTM_DELNEIGH | |
1090 | req.ndm.ndm_family = AF_INET; | |
1091 | req.ndm.ndm_state = NUD_PERMANENT; | |
1092 | req.ndm.ndm_ifindex = ifindex; | |
1093 | req.ndm.ndm_type = RTN_UNICAST; | |
1094 | ||
1095 | addattr_l(&req.n, sizeof(req), NDA_DST, &addr, 4); | |
1096 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, lla, llalen); | |
1097 | ||
936ebf0a | 1098 | return netlink_talk (netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, 0); |
5c610faf DS |
1099 | } |
1100 | ||
718e3744 | 1101 | /* Routing table change via netlink interface. */ |
6ae24471 | 1102 | /* Update flag indicates whether this is a "replace" or not. */ |
6072b24e | 1103 | static int |
05737783 CF |
1104 | netlink_route_multipath (int cmd, struct prefix *p, struct prefix *src_p, |
1105 | struct rib *rib, int update) | |
718e3744 | 1106 | { |
1107 | int bytelen; | |
1108 | struct sockaddr_nl snl; | |
fa713d9e CF |
1109 | struct nexthop *nexthop = NULL, *tnexthop; |
1110 | int recursing; | |
37fe7731 | 1111 | unsigned int nexthop_num; |
718e3744 | 1112 | int discard; |
be717a0a | 1113 | int family = PREFIX_FAMILY(p); |
fa713d9e | 1114 | const char *routedesc; |
c52ef59f DS |
1115 | int setsrc = 0; |
1116 | union g_addr src; | |
718e3744 | 1117 | |
7021c425 | 1118 | struct |
718e3744 | 1119 | { |
1120 | struct nlmsghdr n; | |
1121 | struct rtmsg r; | |
3cadc0cd | 1122 | char buf[NL_PKT_BUF_SIZE]; |
718e3744 | 1123 | } req; |
1124 | ||
fe18ee2d | 1125 | struct zebra_ns *zns = zebra_ns_lookup (NS_DEFAULT); |
8f7d9fc0 FL |
1126 | struct zebra_vrf *zvrf = vrf_info_lookup (rib->vrf_id); |
1127 | ||
a4c06dec | 1128 | memset (&req, 0, sizeof req - NL_PKT_BUF_SIZE); |
718e3744 | 1129 | |
1130 | bytelen = (family == AF_INET ? 4 : 16); | |
1131 | ||
1132 | req.n.nlmsg_len = NLMSG_LENGTH (sizeof (struct rtmsg)); | |
1133 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
6ae24471 DS |
1134 | if ((cmd == RTM_NEWROUTE) && update) |
1135 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
718e3744 | 1136 | req.n.nlmsg_type = cmd; |
1137 | req.r.rtm_family = family; | |
718e3744 | 1138 | req.r.rtm_dst_len = p->prefixlen; |
05737783 | 1139 | req.r.rtm_src_len = src_p ? src_p->prefixlen : 0; |
40da2216 TT |
1140 | req.r.rtm_protocol = RTPROT_ZEBRA; |
1141 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; | |
718e3744 | 1142 | |
7021c425 | 1143 | if ((rib->flags & ZEBRA_FLAG_BLACKHOLE) || (rib->flags & ZEBRA_FLAG_REJECT)) |
718e3744 | 1144 | discard = 1; |
1145 | else | |
1146 | discard = 0; | |
1147 | ||
7021c425 | 1148 | if (cmd == RTM_NEWROUTE) |
718e3744 | 1149 | { |
7021c425 | 1150 | if (discard) |
595db7f1 | 1151 | { |
1152 | if (rib->flags & ZEBRA_FLAG_BLACKHOLE) | |
1153 | req.r.rtm_type = RTN_BLACKHOLE; | |
1154 | else if (rib->flags & ZEBRA_FLAG_REJECT) | |
1155 | req.r.rtm_type = RTN_UNREACHABLE; | |
7021c425 | 1156 | else |
1157 | assert (RTN_BLACKHOLE != RTN_UNREACHABLE); /* false */ | |
1158 | } | |
595db7f1 | 1159 | else |
7021c425 | 1160 | req.r.rtm_type = RTN_UNICAST; |
718e3744 | 1161 | } |
1162 | ||
1163 | addattr_l (&req.n, sizeof req, RTA_DST, &p->u.prefix, bytelen); | |
05737783 CF |
1164 | if (src_p) |
1165 | addattr_l (&req.n, sizeof req, RTA_SRC, &src_p->u.prefix, bytelen); | |
718e3744 | 1166 | |
1167 | /* Metric. */ | |
1f5705f0 DS |
1168 | /* Hardcode the metric for all routes coming from zebra. Metric isn't used |
1169 | * either by the kernel or by zebra. Its purely for calculating best path(s) | |
1170 | * by the routing protocol and for communicating with protocol peers. | |
1171 | */ | |
1172 | addattr32 (&req.n, sizeof req, RTA_PRIORITY, NL_DEFAULT_ROUTE_METRIC); | |
718e3744 | 1173 | |
ca46a78e | 1174 | /* Table corresponding to this route. */ |
1175 | if (rib->table < 256) | |
1176 | req.r.rtm_table = rib->table; | |
1177 | else | |
1178 | { | |
1179 | req.r.rtm_table = RT_TABLE_UNSPEC; | |
1180 | addattr32(&req.n, sizeof req, RTA_TABLE, rib->table); | |
1181 | } | |
1182 | ||
c50ca33a TT |
1183 | if (rib->mtu || rib->nexthop_mtu) |
1184 | { | |
1185 | char buf[NL_PKT_BUF_SIZE]; | |
1186 | struct rtattr *rta = (void *) buf; | |
1187 | u_int32_t mtu = rib->mtu; | |
1188 | if (!mtu || (rib->nexthop_mtu && rib->nexthop_mtu < mtu)) | |
1189 | mtu = rib->nexthop_mtu; | |
1190 | rta->rta_type = RTA_METRICS; | |
1191 | rta->rta_len = RTA_LENGTH(0); | |
1192 | rta_addattr_l (rta, NL_PKT_BUF_SIZE, RTAX_MTU, &mtu, sizeof mtu); | |
1193 | addattr_l (&req.n, NL_PKT_BUF_SIZE, RTA_METRICS, RTA_DATA (rta), | |
1194 | RTA_PAYLOAD (rta)); | |
1195 | } | |
1196 | ||
718e3744 | 1197 | if (discard) |
1198 | { | |
1199 | if (cmd == RTM_NEWROUTE) | |
fa713d9e CF |
1200 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
1201 | { | |
1202 | /* We shouldn't encounter recursive nexthops on discard routes, | |
1203 | * but it is probably better to handle that case correctly anyway. | |
1204 | */ | |
1205 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1206 | continue; | |
fa713d9e | 1207 | } |
718e3744 | 1208 | goto skip; |
1209 | } | |
1210 | ||
fa713d9e CF |
1211 | /* Count overall nexthops so we can decide whether to use singlepath |
1212 | * or multipath case. */ | |
1213 | nexthop_num = 0; | |
1214 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
1215 | { | |
1216 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1217 | continue; | |
1218 | if (cmd == RTM_NEWROUTE && !CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1219 | continue; | |
1220 | if (cmd == RTM_DELROUTE && !CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1221 | continue; | |
1222 | ||
1223 | nexthop_num++; | |
1224 | } | |
1225 | ||
1226 | /* Singlepath case. */ | |
37fe7731 | 1227 | if (nexthop_num == 1 || multipath_num == 1) |
718e3744 | 1228 | { |
fa713d9e CF |
1229 | nexthop_num = 0; |
1230 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
7021c425 | 1231 | { |
fa713d9e | 1232 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) |
c52ef59f | 1233 | { |
c52ef59f DS |
1234 | if (!setsrc) |
1235 | { | |
0aabccc0 DD |
1236 | if (family == AF_INET) |
1237 | { | |
1238 | if (nexthop->rmap_src.ipv4.s_addr != 0) | |
1239 | { | |
1240 | src.ipv4 = nexthop->rmap_src.ipv4; | |
1241 | setsrc = 1; | |
1242 | } | |
1243 | else if (nexthop->src.ipv4.s_addr != 0) | |
1244 | { | |
1245 | src.ipv4 = nexthop->src.ipv4; | |
1246 | setsrc = 1; | |
1247 | } | |
1248 | } | |
1249 | else if (family == AF_INET6) | |
1250 | { | |
1251 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1252 | { | |
1253 | src.ipv6 = nexthop->rmap_src.ipv6; | |
1254 | setsrc = 1; | |
1255 | } | |
1256 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1257 | { | |
1258 | src.ipv6 = nexthop->src.ipv6; | |
1259 | setsrc = 1; | |
1260 | } | |
1261 | } | |
c52ef59f DS |
1262 | } |
1263 | continue; | |
1264 | } | |
7021c425 | 1265 | |
1266 | if ((cmd == RTM_NEWROUTE | |
1267 | && CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1268 | || (cmd == RTM_DELROUTE | |
1269 | && CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB))) | |
1270 | { | |
fa713d9e | 1271 | routedesc = recursing ? "recursive, 1 hop" : "single hop"; |
7021c425 | 1272 | |
8f7d9fc0 | 1273 | _netlink_route_debug(cmd, p, nexthop, routedesc, family, zvrf); |
fa713d9e | 1274 | _netlink_route_build_singlepath(routedesc, bytelen, |
e8d3d299 | 1275 | nexthop, &req.n, &req.r, |
c52ef59f | 1276 | sizeof req, cmd); |
7021c425 | 1277 | nexthop_num++; |
1278 | break; | |
1279 | } | |
1280 | } | |
c52ef59f | 1281 | if (setsrc && (cmd == RTM_NEWROUTE)) |
0aabccc0 DD |
1282 | { |
1283 | if (family == AF_INET) | |
1284 | addattr_l (&req.n, sizeof req, RTA_PREFSRC, &src.ipv4, bytelen); | |
1285 | else if (family == AF_INET6) | |
1286 | addattr_l (&req.n, sizeof req, RTA_PREFSRC, &src.ipv6, bytelen); | |
1287 | } | |
718e3744 | 1288 | } |
1289 | else | |
1290 | { | |
3cadc0cd | 1291 | char buf[NL_PKT_BUF_SIZE]; |
718e3744 | 1292 | struct rtattr *rta = (void *) buf; |
1293 | struct rtnexthop *rtnh; | |
c52ef59f | 1294 | union g_addr *src1 = NULL; |
718e3744 | 1295 | |
1296 | rta->rta_type = RTA_MULTIPATH; | |
7021c425 | 1297 | rta->rta_len = RTA_LENGTH (0); |
1298 | rtnh = RTA_DATA (rta); | |
718e3744 | 1299 | |
1300 | nexthop_num = 0; | |
fa713d9e | 1301 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
7021c425 | 1302 | { |
37fe7731 | 1303 | if (nexthop_num >= multipath_num) |
fa713d9e CF |
1304 | break; |
1305 | ||
1306 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
c52ef59f DS |
1307 | { |
1308 | /* This only works for IPv4 now */ | |
1309 | if (!setsrc) | |
1310 | { | |
0aabccc0 DD |
1311 | if (family == AF_INET) |
1312 | { | |
1313 | if (nexthop->rmap_src.ipv4.s_addr != 0) | |
1314 | { | |
1315 | src.ipv4 = nexthop->rmap_src.ipv4; | |
1316 | setsrc = 1; | |
1317 | } | |
1318 | else if (nexthop->src.ipv4.s_addr != 0) | |
1319 | { | |
1320 | src.ipv4 = nexthop->src.ipv4; | |
1321 | setsrc = 1; | |
1322 | } | |
1323 | } | |
1324 | else if (family == AF_INET6) | |
1325 | { | |
1326 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1327 | { | |
1328 | src.ipv6 = nexthop->rmap_src.ipv6; | |
1329 | setsrc = 1; | |
1330 | } | |
1331 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1332 | { | |
1333 | src.ipv6 = nexthop->src.ipv6; | |
1334 | setsrc = 1; | |
1335 | } | |
1336 | } | |
c52ef59f DS |
1337 | } |
1338 | continue; | |
1339 | } | |
fa713d9e | 1340 | |
7021c425 | 1341 | if ((cmd == RTM_NEWROUTE |
1342 | && CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1343 | || (cmd == RTM_DELROUTE | |
1344 | && CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB))) | |
1345 | { | |
fa713d9e | 1346 | routedesc = recursing ? "recursive, multihop" : "multihop"; |
7021c425 | 1347 | nexthop_num++; |
1348 | ||
fa713d9e | 1349 | _netlink_route_debug(cmd, p, nexthop, |
8f7d9fc0 | 1350 | routedesc, family, zvrf); |
fa713d9e | 1351 | _netlink_route_build_multipath(routedesc, bytelen, |
5c610faf | 1352 | nexthop, rta, rtnh, &req.r, &src1); |
7021c425 | 1353 | rtnh = RTNH_NEXT (rtnh); |
1354 | ||
c52ef59f DS |
1355 | if (!setsrc && src1) |
1356 | { | |
0aabccc0 DD |
1357 | if (family == AF_INET) |
1358 | src.ipv4 = src1->ipv4; | |
1359 | else if (family == AF_INET6) | |
1360 | src.ipv6 = src1->ipv6; | |
1361 | ||
c52ef59f DS |
1362 | setsrc = 1; |
1363 | } | |
7021c425 | 1364 | } |
1365 | } | |
c52ef59f | 1366 | if (setsrc && (cmd == RTM_NEWROUTE)) |
0aabccc0 DD |
1367 | { |
1368 | if (family == AF_INET) | |
1369 | addattr_l (&req.n, sizeof req, RTA_PREFSRC, &src.ipv4, bytelen); | |
1370 | else if (family == AF_INET6) | |
1371 | addattr_l (&req.n, sizeof req, RTA_PREFSRC, &src.ipv6, bytelen); | |
82a95360 DS |
1372 | if (IS_ZEBRA_DEBUG_KERNEL) |
1373 | zlog_debug("Setting source"); | |
0aabccc0 | 1374 | } |
718e3744 | 1375 | |
1376 | if (rta->rta_len > RTA_LENGTH (0)) | |
3cadc0cd | 1377 | addattr_l (&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, RTA_DATA (rta), |
7021c425 | 1378 | RTA_PAYLOAD (rta)); |
718e3744 | 1379 | } |
1380 | ||
1381 | /* If there is no useful nexthop then return. */ | |
1382 | if (nexthop_num == 0) | |
1383 | { | |
1384 | if (IS_ZEBRA_DEBUG_KERNEL) | |
b6178002 | 1385 | zlog_debug ("netlink_route_multipath(): No useful nexthop."); |
718e3744 | 1386 | return 0; |
1387 | } | |
1388 | ||
7021c425 | 1389 | skip: |
718e3744 | 1390 | |
1391 | /* Destination netlink address. */ | |
1392 | memset (&snl, 0, sizeof snl); | |
1393 | snl.nl_family = AF_NETLINK; | |
1394 | ||
718e3744 | 1395 | /* Talk to netlink socket. */ |
936ebf0a | 1396 | return netlink_talk (netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, 0); |
718e3744 | 1397 | } |
1398 | ||
e3be0432 | 1399 | int |
1498c059 | 1400 | kernel_get_ipmr_sg_stats (void *in) |
e3be0432 DS |
1401 | { |
1402 | int suc = 0; | |
1403 | struct mcast_route_data *mr = (struct mcast_route_data *)in; | |
1404 | struct { | |
1405 | struct nlmsghdr n; | |
1406 | struct ndmsg ndm; | |
1407 | char buf[256]; | |
1408 | } req; | |
1409 | ||
1410 | mroute = mr; | |
1411 | struct zebra_ns *zns = zebra_ns_lookup (NS_DEFAULT); | |
1412 | ||
1413 | memset(&req.n, 0, sizeof(req.n)); | |
1414 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1415 | ||
1416 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1417 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1418 | req.ndm.ndm_family = AF_INET; | |
1419 | req.n.nlmsg_type = RTM_GETROUTE; | |
1420 | ||
1421 | addattr_l (&req.n, sizeof (req), RTA_IIF, &mroute->ifindex, 4); | |
1422 | addattr_l (&req.n, sizeof (req), RTA_OIF, &mroute->ifindex, 4); | |
1423 | addattr_l (&req.n, sizeof (req), RTA_SRC, &mroute->sg.src.s_addr, 4); | |
1424 | addattr_l (&req.n, sizeof (req), RTA_DST, &mroute->sg.grp.s_addr, 4); | |
1425 | ||
936ebf0a | 1426 | suc = netlink_talk (netlink_route_change_read_multicast, &req.n, &zns->netlink_cmd, zns, 0); |
e3be0432 DS |
1427 | |
1428 | mroute = NULL; | |
1429 | return suc; | |
1430 | } | |
1431 | ||
718e3744 | 1432 | int |
05737783 CF |
1433 | kernel_route_rib (struct prefix *p, struct prefix *src_p, |
1434 | struct rib *old, struct rib *new) | |
718e3744 | 1435 | { |
be717a0a | 1436 | if (!old && new) |
05737783 | 1437 | return netlink_route_multipath (RTM_NEWROUTE, p, src_p, new, 0); |
be717a0a | 1438 | if (old && !new) |
05737783 | 1439 | return netlink_route_multipath (RTM_DELROUTE, p, src_p, old, 0); |
718e3744 | 1440 | |
05737783 | 1441 | return netlink_route_multipath (RTM_NEWROUTE, p, src_p, new, 1); |
718e3744 | 1442 | } |
1443 | ||
6b8a5694 RW |
1444 | int |
1445 | kernel_neigh_update (int add, int ifindex, uint32_t addr, char *lla, int llalen) | |
1446 | { | |
1447 | return netlink_neigh_update(add ? RTM_NEWNEIGH : RTM_DELNEIGH, ifindex, addr, | |
1448 | lla, llalen); | |
1449 | } | |
718e3744 | 1450 | |
40c7bdb0 | 1451 | /* |
1452 | * MPLS label forwarding table change via netlink interface. | |
1453 | */ | |
be0dba35 | 1454 | int |
40c7bdb0 | 1455 | netlink_mpls_multipath (int cmd, zebra_lsp_t *lsp) |
1456 | { | |
1457 | mpls_lse_t lse; | |
1458 | zebra_nhlfe_t *nhlfe; | |
1459 | struct nexthop *nexthop = NULL; | |
37fe7731 | 1460 | unsigned int nexthop_num; |
40c7bdb0 | 1461 | const char *routedesc; |
1462 | struct zebra_ns *zns = zebra_ns_lookup (NS_DEFAULT); | |
1463 | ||
1464 | struct | |
1465 | { | |
1466 | struct nlmsghdr n; | |
1467 | struct rtmsg r; | |
1468 | char buf[NL_PKT_BUF_SIZE]; | |
1469 | } req; | |
1470 | ||
1471 | memset (&req, 0, sizeof req - NL_PKT_BUF_SIZE); | |
1472 | ||
1473 | ||
1474 | /* | |
1475 | * Count # nexthops so we can decide whether to use singlepath | |
1476 | * or multipath case. | |
1477 | */ | |
1478 | nexthop_num = 0; | |
1479 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
1480 | { | |
1481 | nexthop = nhlfe->nexthop; | |
1482 | if (!nexthop) | |
1483 | continue; | |
1484 | if (cmd == RTM_NEWROUTE) | |
1485 | { | |
1486 | /* Count all selected NHLFEs */ | |
1487 | if (CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_SELECTED) && | |
1488 | CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1489 | nexthop_num++; | |
1490 | } | |
1491 | else /* DEL */ | |
1492 | { | |
1493 | /* Count all installed NHLFEs */ | |
1494 | if (CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED) && | |
1495 | CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1496 | nexthop_num++; | |
1497 | } | |
1498 | } | |
1499 | ||
1500 | if (nexthop_num == 0) // unexpected | |
1501 | return 0; | |
1502 | ||
1503 | req.n.nlmsg_len = NLMSG_LENGTH (sizeof (struct rtmsg)); | |
1504 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1505 | req.n.nlmsg_type = cmd; | |
1506 | req.r.rtm_family = AF_MPLS; | |
1507 | req.r.rtm_table = RT_TABLE_MAIN; | |
1508 | req.r.rtm_dst_len = MPLS_LABEL_LEN_BITS; | |
1509 | req.r.rtm_protocol = RTPROT_ZEBRA; | |
1510 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; | |
1511 | req.r.rtm_type = RTN_UNICAST; | |
1512 | ||
1513 | if (cmd == RTM_NEWROUTE) | |
1514 | /* We do a replace to handle update. */ | |
1515 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
1516 | ||
1517 | /* Fill destination */ | |
1518 | lse = mpls_lse_encode (lsp->ile.in_label, 0, 0, 1); | |
1519 | addattr_l (&req.n, sizeof req, RTA_DST, &lse, sizeof(mpls_lse_t)); | |
1520 | ||
1521 | /* Fill nexthops (paths) based on single-path or multipath. The paths | |
1522 | * chosen depend on the operation. | |
1523 | */ | |
37fe7731 | 1524 | if (nexthop_num == 1 || multipath_num == 1) |
40c7bdb0 | 1525 | { |
1526 | routedesc = "single hop"; | |
1527 | _netlink_mpls_debug(cmd, lsp->ile.in_label, routedesc); | |
1528 | ||
1529 | nexthop_num = 0; | |
1530 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
1531 | { | |
1532 | nexthop = nhlfe->nexthop; | |
1533 | if (!nexthop) | |
1534 | continue; | |
1535 | ||
1536 | if ((cmd == RTM_NEWROUTE && | |
1537 | (CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_SELECTED) && | |
1538 | CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE))) || | |
1539 | (cmd == RTM_DELROUTE && | |
1540 | (CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED) && | |
1541 | CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)))) | |
1542 | { | |
1543 | /* Add the gateway */ | |
1544 | _netlink_mpls_build_singlepath(routedesc, nhlfe, | |
1545 | &req.n, &req.r, sizeof req, cmd); | |
1546 | if (cmd == RTM_NEWROUTE) | |
1547 | { | |
1548 | SET_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
1549 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1550 | } | |
1551 | else | |
1552 | { | |
1553 | UNSET_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
1554 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1555 | } | |
1556 | nexthop_num++; | |
1557 | break; | |
1558 | } | |
1559 | } | |
1560 | } | |
1561 | else /* Multipath case */ | |
1562 | { | |
1563 | char buf[NL_PKT_BUF_SIZE]; | |
1564 | struct rtattr *rta = (void *) buf; | |
1565 | struct rtnexthop *rtnh; | |
1566 | union g_addr *src1 = NULL; | |
1567 | ||
1568 | rta->rta_type = RTA_MULTIPATH; | |
1569 | rta->rta_len = RTA_LENGTH (0); | |
1570 | rtnh = RTA_DATA (rta); | |
1571 | ||
1572 | routedesc = "multihop"; | |
1573 | _netlink_mpls_debug(cmd, lsp->ile.in_label, routedesc); | |
1574 | ||
1575 | nexthop_num = 0; | |
1576 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
1577 | { | |
1578 | nexthop = nhlfe->nexthop; | |
1579 | if (!nexthop) | |
1580 | continue; | |
1581 | ||
37fe7731 | 1582 | if (nexthop_num >= multipath_num) |
40c7bdb0 | 1583 | break; |
1584 | ||
1585 | if ((cmd == RTM_NEWROUTE && | |
1586 | (CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_SELECTED) && | |
1587 | CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE))) || | |
1588 | (cmd == RTM_DELROUTE && | |
1589 | (CHECK_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED) && | |
1590 | CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)))) | |
1591 | { | |
1592 | nexthop_num++; | |
1593 | ||
1594 | /* Build the multipath */ | |
1595 | _netlink_mpls_build_multipath(routedesc, nhlfe, rta, | |
1596 | rtnh, &req.r, &src1); | |
1597 | rtnh = RTNH_NEXT (rtnh); | |
1598 | ||
1599 | if (cmd == RTM_NEWROUTE) | |
1600 | { | |
1601 | SET_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
1602 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1603 | } | |
1604 | else | |
1605 | { | |
1606 | UNSET_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
1607 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1608 | } | |
1609 | ||
1610 | } | |
1611 | } | |
1612 | ||
1613 | /* Add the multipath */ | |
1614 | if (rta->rta_len > RTA_LENGTH (0)) | |
1615 | addattr_l (&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, RTA_DATA (rta), | |
1616 | RTA_PAYLOAD (rta)); | |
1617 | } | |
1618 | ||
1619 | /* Talk to netlink socket. */ | |
936ebf0a | 1620 | return netlink_talk (netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, 0); |
40c7bdb0 | 1621 | } |
1622 | ||
1623 | /* | |
1624 | * Handle failure in LSP install, clear flags for NHLFE. | |
1625 | */ | |
be0dba35 | 1626 | void |
40c7bdb0 | 1627 | clear_nhlfe_installed (zebra_lsp_t *lsp) |
1628 | { | |
1629 | zebra_nhlfe_t *nhlfe; | |
1630 | struct nexthop *nexthop; | |
1631 | ||
1632 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
1633 | { | |
1634 | nexthop = nhlfe->nexthop; | |
1635 | if (!nexthop) | |
1636 | continue; | |
1637 | ||
1638 | UNSET_FLAG (nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
1639 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1640 | } | |
1641 | } |