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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 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
ddfeb486 DL |
22 | |
23 | #ifdef HAVE_NETLINK | |
24 | ||
8ccc7e80 | 25 | #include <net/if_arp.h> |
ba777396 RW |
26 | #include <linux/lwtunnel.h> |
27 | #include <linux/mpls_iptunnel.h> | |
28 | #include <linux/neighbour.h> | |
29 | #include <linux/rtnetlink.h> | |
718e3744 | 30 | |
31 | /* Hack for GNU libc version 2. */ | |
32 | #ifndef MSG_TRUNC | |
33 | #define MSG_TRUNC 0x20 | |
34 | #endif /* MSG_TRUNC */ | |
35 | ||
36 | #include "linklist.h" | |
37 | #include "if.h" | |
38 | #include "log.h" | |
39 | #include "prefix.h" | |
40 | #include "connected.h" | |
41 | #include "table.h" | |
26e2ae36 | 42 | #include "memory.h" |
4a1ab8e4 | 43 | #include "zebra_memory.h" |
718e3744 | 44 | #include "rib.h" |
e04ab74d | 45 | #include "thread.h" |
edd7c245 | 46 | #include "privs.h" |
fb018d25 | 47 | #include "nexthop.h" |
78104b9b | 48 | #include "vrf.h" |
5e6a74d8 | 49 | #include "vty.h" |
40c7bdb0 | 50 | #include "mpls.h" |
13d60d35 | 51 | #include "vxlan.h" |
718e3744 | 52 | |
53 | #include "zebra/zserv.h" | |
fe18ee2d | 54 | #include "zebra/zebra_ns.h" |
7c551956 | 55 | #include "zebra/zebra_vrf.h" |
6621ca86 | 56 | #include "zebra/rt.h" |
718e3744 | 57 | #include "zebra/redistribute.h" |
58 | #include "zebra/interface.h" | |
59 | #include "zebra/debug.h" | |
12f6fb97 | 60 | #include "zebra/rtadv.h" |
567b877d | 61 | #include "zebra/zebra_ptm.h" |
40c7bdb0 | 62 | #include "zebra/zebra_mpls.h" |
1fdc9eae | 63 | #include "zebra/kernel_netlink.h" |
64 | #include "zebra/rt_netlink.h" | |
e3be0432 | 65 | #include "zebra/zebra_mroute.h" |
2232a77c | 66 | #include "zebra/zebra_vxlan.h" |
e3be0432 | 67 | |
40c7bdb0 | 68 | #ifndef AF_MPLS |
69 | #define AF_MPLS 28 | |
70 | #endif | |
71 | ||
2232a77c | 72 | static vlanid_t filter_vlan = 0; |
73 | ||
d62a17ae | 74 | struct gw_family_t { |
75 | u_int16_t filler; | |
76 | u_int16_t family; | |
77 | union g_addr gate; | |
40c7bdb0 | 78 | }; |
79 | ||
8755598a DS |
80 | char ipv4_ll_buf[16] = "169.254.0.1"; |
81 | struct in_addr ipv4_ll; | |
82 | ||
83 | /* | |
84 | * The ipv4_ll data structure is used for all 5549 | |
85 | * additions to the kernel. Let's figure out the | |
86 | * correct value one time instead for every | |
87 | * install/remove of a 5549 type route | |
88 | */ | |
d62a17ae | 89 | void rt_netlink_init(void) |
8755598a | 90 | { |
d62a17ae | 91 | inet_pton(AF_INET, ipv4_ll_buf, &ipv4_ll); |
8755598a DS |
92 | } |
93 | ||
23b1f334 DD |
94 | static inline int is_selfroute(int proto) |
95 | { | |
d62a17ae | 96 | if ((proto == RTPROT_BGP) || (proto == RTPROT_OSPF) |
97 | || (proto == RTPROT_STATIC) || (proto == RTPROT_ZEBRA) | |
98 | || (proto == RTPROT_ISIS) || (proto == RTPROT_RIPNG) | |
99 | || (proto == RTPROT_NHRP) || (proto == RTPROT_EIGRP) | |
915902cb | 100 | || (proto == RTPROT_LDP) || (proto == RTPROT_BABEL) |
7726c479 | 101 | || (proto == RTPROT_RIP) || (proto == RTPROT_SHARP)) { |
d62a17ae | 102 | return 1; |
103 | } | |
104 | ||
105 | return 0; | |
23b1f334 DD |
106 | } |
107 | ||
915902cb | 108 | static inline int zebra2proto(int proto) |
23b1f334 | 109 | { |
d62a17ae | 110 | switch (proto) { |
111 | case ZEBRA_ROUTE_BABEL: | |
112 | proto = RTPROT_BABEL; | |
113 | break; | |
114 | case ZEBRA_ROUTE_BGP: | |
115 | proto = RTPROT_BGP; | |
116 | break; | |
117 | case ZEBRA_ROUTE_OSPF: | |
118 | case ZEBRA_ROUTE_OSPF6: | |
119 | proto = RTPROT_OSPF; | |
120 | break; | |
121 | case ZEBRA_ROUTE_STATIC: | |
122 | proto = RTPROT_STATIC; | |
123 | break; | |
124 | case ZEBRA_ROUTE_ISIS: | |
125 | proto = RTPROT_ISIS; | |
126 | break; | |
127 | case ZEBRA_ROUTE_RIP: | |
128 | proto = RTPROT_RIP; | |
129 | break; | |
130 | case ZEBRA_ROUTE_RIPNG: | |
131 | proto = RTPROT_RIPNG; | |
132 | break; | |
133 | case ZEBRA_ROUTE_NHRP: | |
134 | proto = RTPROT_NHRP; | |
135 | break; | |
136 | case ZEBRA_ROUTE_EIGRP: | |
137 | proto = RTPROT_EIGRP; | |
138 | break; | |
139 | case ZEBRA_ROUTE_LDP: | |
140 | proto = RTPROT_LDP; | |
141 | break; | |
8a71d93d DS |
142 | case ZEBRA_ROUTE_SHARP: |
143 | proto = RTPROT_SHARP; | |
144 | break; | |
d62a17ae | 145 | default: |
146 | proto = RTPROT_ZEBRA; | |
147 | break; | |
148 | } | |
149 | ||
150 | return proto; | |
23b1f334 DD |
151 | } |
152 | ||
915902cb DS |
153 | static inline int proto2zebra(int proto, int family) |
154 | { | |
155 | switch (proto) { | |
156 | case RTPROT_BABEL: | |
157 | proto = ZEBRA_ROUTE_BABEL; | |
158 | break; | |
159 | case RTPROT_BGP: | |
160 | proto = ZEBRA_ROUTE_BGP; | |
161 | break; | |
162 | case RTPROT_OSPF: | |
163 | proto = (family == AFI_IP) ? | |
164 | ZEBRA_ROUTE_OSPF : ZEBRA_ROUTE_OSPF6; | |
165 | break; | |
166 | case RTPROT_ISIS: | |
167 | proto = ZEBRA_ROUTE_ISIS; | |
168 | break; | |
169 | case RTPROT_RIP: | |
170 | proto = ZEBRA_ROUTE_RIP; | |
171 | break; | |
172 | case RTPROT_RIPNG: | |
173 | proto = ZEBRA_ROUTE_RIPNG; | |
174 | break; | |
175 | case RTPROT_NHRP: | |
176 | proto = ZEBRA_ROUTE_NHRP; | |
177 | break; | |
178 | case RTPROT_EIGRP: | |
179 | proto = ZEBRA_ROUTE_EIGRP; | |
180 | break; | |
181 | case RTPROT_LDP: | |
182 | proto = ZEBRA_ROUTE_LDP; | |
183 | break; | |
184 | case RTPROT_STATIC: | |
185 | proto = ZEBRA_ROUTE_STATIC; | |
186 | break; | |
187 | default: | |
188 | proto = ZEBRA_ROUTE_KERNEL; | |
189 | break; | |
190 | } | |
191 | return proto; | |
192 | } | |
193 | ||
12f6fb97 DS |
194 | /* |
195 | Pending: create an efficient table_id (in a tree/hash) based lookup) | |
196 | */ | |
d62a17ae | 197 | static vrf_id_t vrf_lookup_by_table(u_int32_t table_id) |
12f6fb97 | 198 | { |
d62a17ae | 199 | struct vrf *vrf; |
200 | struct zebra_vrf *zvrf; | |
12f6fb97 | 201 | |
a2addae8 | 202 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
d62a17ae | 203 | if ((zvrf = vrf->info) == NULL || (zvrf->table_id != table_id)) |
204 | continue; | |
12f6fb97 | 205 | |
d62a17ae | 206 | return zvrf_id(zvrf); |
207 | } | |
12f6fb97 | 208 | |
d62a17ae | 209 | return VRF_DEFAULT; |
12f6fb97 DS |
210 | } |
211 | ||
718e3744 | 212 | /* Looking up routing table by netlink interface. */ |
d62a17ae | 213 | static int netlink_route_change_read_unicast(struct sockaddr_nl *snl, |
214 | struct nlmsghdr *h, ns_id_t ns_id, | |
215 | int startup) | |
718e3744 | 216 | { |
d62a17ae | 217 | int len; |
218 | struct rtmsg *rtm; | |
219 | struct rtattr *tb[RTA_MAX + 1]; | |
220 | u_char flags = 0; | |
221 | struct prefix p; | |
792fa92e | 222 | struct prefix_ipv6 src_p = {}; |
d62a17ae | 223 | vrf_id_t vrf_id = VRF_DEFAULT; |
224 | ||
225 | char anyaddr[16] = {0}; | |
226 | ||
915902cb | 227 | int proto = ZEBRA_ROUTE_KERNEL; |
d62a17ae | 228 | int index = 0; |
229 | int table; | |
230 | int metric = 0; | |
231 | u_int32_t mtu = 0; | |
25715c7e | 232 | uint8_t distance = 0; |
4e40b6d6 | 233 | route_tag_t tag = 0; |
d62a17ae | 234 | |
235 | void *dest = NULL; | |
236 | void *gate = NULL; | |
237 | void *prefsrc = NULL; /* IPv4 preferred source host address */ | |
238 | void *src = NULL; /* IPv6 srcdest source prefix */ | |
e655a03c | 239 | enum blackhole_type bh_type = BLACKHOLE_UNSPEC; |
d62a17ae | 240 | |
241 | rtm = NLMSG_DATA(h); | |
242 | ||
243 | if (startup && h->nlmsg_type != RTM_NEWROUTE) | |
244 | return 0; | |
e655a03c DL |
245 | switch (rtm->rtm_type) { |
246 | case RTN_UNICAST: | |
247 | break; | |
248 | case RTN_BLACKHOLE: | |
249 | bh_type = BLACKHOLE_NULL; | |
250 | break; | |
251 | case RTN_UNREACHABLE: | |
252 | bh_type = BLACKHOLE_REJECT; | |
253 | break; | |
254 | case RTN_PROHIBIT: | |
255 | bh_type = BLACKHOLE_ADMINPROHIB; | |
256 | break; | |
257 | default: | |
d62a17ae | 258 | return 0; |
e655a03c | 259 | } |
d62a17ae | 260 | |
261 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
262 | if (len < 0) | |
263 | return -1; | |
264 | ||
265 | memset(tb, 0, sizeof tb); | |
266 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
267 | ||
268 | if (rtm->rtm_flags & RTM_F_CLONED) | |
269 | return 0; | |
270 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
271 | return 0; | |
272 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
273 | return 0; | |
274 | ||
275 | if (!startup && is_selfroute(rtm->rtm_protocol) | |
276 | && h->nlmsg_type == RTM_NEWROUTE) | |
277 | return 0; | |
278 | ||
279 | /* We don't care about change notifications for the MPLS table. */ | |
280 | /* TODO: Revisit this. */ | |
281 | if (rtm->rtm_family == AF_MPLS) | |
282 | return 0; | |
283 | ||
284 | /* Table corresponding to route. */ | |
285 | if (tb[RTA_TABLE]) | |
286 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
287 | else | |
288 | table = rtm->rtm_table; | |
289 | ||
290 | /* Map to VRF */ | |
291 | vrf_id = vrf_lookup_by_table(table); | |
292 | if (vrf_id == VRF_DEFAULT) { | |
293 | if (!is_zebra_valid_kernel_table(table) | |
294 | && !is_zebra_main_routing_table(table)) | |
295 | return 0; | |
296 | } | |
297 | ||
298 | /* Route which inserted by Zebra. */ | |
915902cb | 299 | if (is_selfroute(rtm->rtm_protocol)) { |
d62a17ae | 300 | flags |= ZEBRA_FLAG_SELFROUTE; |
915902cb DS |
301 | proto = proto2zebra(rtm->rtm_protocol, rtm->rtm_family); |
302 | } | |
d62a17ae | 303 | if (tb[RTA_OIF]) |
304 | index = *(int *)RTA_DATA(tb[RTA_OIF]); | |
305 | ||
306 | if (tb[RTA_DST]) | |
307 | dest = RTA_DATA(tb[RTA_DST]); | |
308 | else | |
309 | dest = anyaddr; | |
310 | ||
311 | if (tb[RTA_SRC]) | |
312 | src = RTA_DATA(tb[RTA_SRC]); | |
313 | else | |
314 | src = anyaddr; | |
315 | ||
316 | if (tb[RTA_PREFSRC]) | |
317 | prefsrc = RTA_DATA(tb[RTA_PREFSRC]); | |
318 | ||
319 | if (tb[RTA_GATEWAY]) | |
320 | gate = RTA_DATA(tb[RTA_GATEWAY]); | |
321 | ||
f19435a8 DS |
322 | if (tb[RTA_PRIORITY]) |
323 | metric = *(int *)RTA_DATA(tb[RTA_PRIORITY]); | |
d62a17ae | 324 | |
4e40b6d6 KK |
325 | #if defined(SUPPORT_REALMS) |
326 | if (tb[RTA_FLOW]) | |
327 | tag = *(uint32_t *)RTA_DATA(tb[RTA_FLOW]); | |
328 | #endif | |
329 | ||
f19435a8 DS |
330 | if (tb[RTA_METRICS]) { |
331 | struct rtattr *mxrta[RTAX_MAX + 1]; | |
d62a17ae | 332 | |
f19435a8 DS |
333 | memset(mxrta, 0, sizeof mxrta); |
334 | netlink_parse_rtattr(mxrta, RTAX_MAX, | |
335 | RTA_DATA(tb[RTA_METRICS]), | |
336 | RTA_PAYLOAD(tb[RTA_METRICS])); | |
d62a17ae | 337 | |
f19435a8 DS |
338 | if (mxrta[RTAX_MTU]) |
339 | mtu = *(u_int32_t *)RTA_DATA(mxrta[RTAX_MTU]); | |
d62a17ae | 340 | } |
341 | ||
342 | if (rtm->rtm_family == AF_INET) { | |
343 | p.family = AF_INET; | |
344 | memcpy(&p.u.prefix4, dest, 4); | |
345 | p.prefixlen = rtm->rtm_dst_len; | |
346 | ||
347 | src_p.prefixlen = | |
348 | 0; // Forces debug below to not display anything | |
349 | } else if (rtm->rtm_family == AF_INET6) { | |
350 | p.family = AF_INET6; | |
351 | memcpy(&p.u.prefix6, dest, 16); | |
352 | p.prefixlen = rtm->rtm_dst_len; | |
353 | ||
354 | src_p.family = AF_INET6; | |
355 | memcpy(&src_p.prefix, src, 16); | |
356 | src_p.prefixlen = rtm->rtm_src_len; | |
357 | } | |
358 | ||
359 | if (rtm->rtm_src_len != 0) { | |
360 | char buf[PREFIX_STRLEN]; | |
361 | zlog_warn( | |
362 | "unsupported IPv[4|6] sourcedest route (dest %s vrf %u)", | |
363 | prefix2str(&p, buf, sizeof(buf)), vrf_id); | |
364 | return 0; | |
365 | } | |
366 | ||
25715c7e DS |
367 | /* |
368 | * For ZEBRA_ROUTE_KERNEL types: | |
369 | * | |
370 | * The metric/priority of the route received from the kernel | |
371 | * is a 32 bit number. We are going to interpret the high | |
372 | * order byte as the Admin Distance and the low order 3 bytes | |
373 | * as the metric. | |
374 | * | |
375 | * This will allow us to do two things: | |
376 | * 1) Allow the creation of kernel routes that can be | |
377 | * overridden by zebra. | |
378 | * 2) Allow the old behavior for 'most' kernel route types | |
379 | * if a user enters 'ip route ...' v4 routes get a metric | |
380 | * of 0 and v6 routes get a metric of 1024. Both of these | |
381 | * values will end up with a admin distance of 0, which | |
382 | * will cause them to win for the purposes of zebra. | |
383 | */ | |
384 | if (proto == ZEBRA_ROUTE_KERNEL) { | |
385 | distance = (metric >> 24) & 0xFF; | |
386 | metric = (metric & 0x00FFFFFF); | |
387 | } | |
388 | ||
d62a17ae | 389 | if (IS_ZEBRA_DEBUG_KERNEL) { |
390 | char buf[PREFIX_STRLEN]; | |
391 | char buf2[PREFIX_STRLEN]; | |
392 | zlog_debug( | |
25715c7e | 393 | "%s %s%s%s vrf %u metric: %d Admin Distance: %d", nl_msg_type_to_str(h->nlmsg_type), |
d62a17ae | 394 | prefix2str(&p, buf, sizeof(buf)), |
395 | src_p.prefixlen ? " from " : "", | |
396 | src_p.prefixlen ? prefix2str(&src_p, buf2, sizeof(buf2)) | |
397 | : "", | |
25715c7e | 398 | vrf_id, metric, distance); |
d62a17ae | 399 | } |
400 | ||
401 | afi_t afi = AFI_IP; | |
402 | if (rtm->rtm_family == AF_INET6) | |
403 | afi = AFI_IP6; | |
404 | ||
405 | if (h->nlmsg_type == RTM_NEWROUTE) { | |
fd36be7e DL |
406 | if (!tb[RTA_MULTIPATH]) { |
407 | struct nexthop nh; | |
408 | size_t sz = (afi == AFI_IP) ? 4 : 16; | |
409 | ||
410 | memset(&nh, 0, sizeof(nh)); | |
af760ec1 DS |
411 | |
412 | if (bh_type == BLACKHOLE_UNSPEC) { | |
413 | if (index && !gate) | |
414 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
415 | else if (index && gate) | |
1dca2eaa | 416 | nh.type = (afi == AFI_IP) |
af760ec1 DS |
417 | ? NEXTHOP_TYPE_IPV4_IFINDEX |
418 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
419 | else if (!index && gate) | |
1dca2eaa RW |
420 | nh.type = (afi == AFI_IP) |
421 | ? NEXTHOP_TYPE_IPV4 | |
422 | : NEXTHOP_TYPE_IPV6; | |
af760ec1 DS |
423 | else { |
424 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
425 | nh.bh_type = bh_type; | |
426 | } | |
427 | } else { | |
fd36be7e | 428 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
e655a03c DL |
429 | nh.bh_type = bh_type; |
430 | } | |
fd36be7e DL |
431 | nh.ifindex = index; |
432 | if (prefsrc) | |
433 | memcpy(&nh.src, prefsrc, sz); | |
434 | if (gate) | |
435 | memcpy(&nh.gate, gate, sz); | |
915902cb DS |
436 | |
437 | rib_add(afi, SAFI_UNICAST, vrf_id, proto, | |
4e40b6d6 KK |
438 | 0, flags, &p, NULL, &nh, table, metric, |
439 | mtu, distance, tag); | |
fd36be7e | 440 | } else { |
d62a17ae | 441 | /* This is a multipath route */ |
442 | ||
443 | struct route_entry *re; | |
444 | struct rtnexthop *rtnh = | |
445 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
446 | ||
447 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
448 | ||
449 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); | |
915902cb | 450 | re->type = proto; |
25715c7e | 451 | re->distance = distance; |
d62a17ae | 452 | re->flags = flags; |
453 | re->metric = metric; | |
454 | re->mtu = mtu; | |
455 | re->vrf_id = vrf_id; | |
456 | re->table = table; | |
457 | re->nexthop_num = 0; | |
458 | re->uptime = time(NULL); | |
4e40b6d6 | 459 | re->tag = tag; |
d62a17ae | 460 | |
461 | for (;;) { | |
462 | if (len < (int)sizeof(*rtnh) | |
463 | || rtnh->rtnh_len > len) | |
464 | break; | |
465 | ||
466 | index = rtnh->rtnh_ifindex; | |
467 | gate = 0; | |
468 | if (rtnh->rtnh_len > sizeof(*rtnh)) { | |
469 | memset(tb, 0, sizeof(tb)); | |
470 | netlink_parse_rtattr( | |
471 | tb, RTA_MAX, RTNH_DATA(rtnh), | |
472 | rtnh->rtnh_len - sizeof(*rtnh)); | |
473 | if (tb[RTA_GATEWAY]) | |
474 | gate = RTA_DATA( | |
475 | tb[RTA_GATEWAY]); | |
476 | } | |
477 | ||
478 | if (gate) { | |
479 | if (rtm->rtm_family == AF_INET) { | |
480 | if (index) | |
481 | route_entry_nexthop_ipv4_ifindex_add( | |
482 | re, gate, | |
483 | prefsrc, index); | |
484 | else | |
485 | route_entry_nexthop_ipv4_add( | |
486 | re, gate, | |
487 | prefsrc); | |
488 | } else if (rtm->rtm_family | |
489 | == AF_INET6) { | |
490 | if (index) | |
491 | route_entry_nexthop_ipv6_ifindex_add( | |
492 | re, gate, | |
493 | index); | |
494 | else | |
495 | route_entry_nexthop_ipv6_add( | |
496 | re, gate); | |
497 | } | |
498 | } else | |
499 | route_entry_nexthop_ifindex_add(re, | |
500 | index); | |
501 | ||
502 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
503 | rtnh = RTNH_NEXT(rtnh); | |
504 | } | |
505 | ||
506 | zserv_nexthop_num_warn(__func__, | |
507 | (const struct prefix *)&p, | |
508 | re->nexthop_num); | |
509 | if (re->nexthop_num == 0) | |
510 | XFREE(MTYPE_RE, re); | |
511 | else | |
7990990e | 512 | rib_add_multipath(afi, SAFI_UNICAST, &p, |
d62a17ae | 513 | NULL, re); |
514 | } | |
515 | } else { | |
fd36be7e DL |
516 | if (!tb[RTA_MULTIPATH]) { |
517 | struct nexthop nh; | |
518 | size_t sz = (afi == AFI_IP) ? 4 : 16; | |
519 | ||
520 | memset(&nh, 0, sizeof(nh)); | |
8ba5bd58 RW |
521 | if (bh_type == BLACKHOLE_UNSPEC) { |
522 | if (index && !gate) | |
523 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
524 | else if (index && gate) | |
525 | nh.type = | |
526 | (afi == AFI_IP) | |
527 | ? NEXTHOP_TYPE_IPV4_IFINDEX | |
528 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
529 | else if (!index && gate) | |
530 | nh.type = (afi == AFI_IP) | |
531 | ? NEXTHOP_TYPE_IPV4 | |
60466a63 | 532 | : NEXTHOP_TYPE_IPV6; |
8ba5bd58 RW |
533 | else { |
534 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
535 | nh.bh_type = BLACKHOLE_UNSPEC; | |
536 | } | |
537 | } else { | |
fd36be7e | 538 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
8ba5bd58 RW |
539 | nh.bh_type = bh_type; |
540 | } | |
fd36be7e DL |
541 | nh.ifindex = index; |
542 | if (gate) | |
543 | memcpy(&nh.gate, gate, sz); | |
d62a17ae | 544 | rib_delete(afi, SAFI_UNICAST, vrf_id, |
915902cb | 545 | proto, 0, flags, &p, NULL, &nh, |
6134fd82 | 546 | table, metric, true, NULL); |
fd36be7e DL |
547 | } else { |
548 | /* XXX: need to compare the entire list of nexthops | |
549 | * here for NLM_F_APPEND stupidity */ | |
550 | rib_delete(afi, SAFI_UNICAST, vrf_id, | |
915902cb | 551 | proto, 0, flags, &p, NULL, NULL, |
6134fd82 | 552 | table, metric, true, NULL); |
d62a17ae | 553 | } |
554 | } | |
555 | ||
556 | return 0; | |
718e3744 | 557 | } |
558 | ||
e3be0432 DS |
559 | static struct mcast_route_data *mroute = NULL; |
560 | ||
d62a17ae | 561 | static int netlink_route_change_read_multicast(struct sockaddr_nl *snl, |
562 | struct nlmsghdr *h, | |
563 | ns_id_t ns_id, int startup) | |
565fdc75 | 564 | { |
d62a17ae | 565 | int len; |
566 | struct rtmsg *rtm; | |
567 | struct rtattr *tb[RTA_MAX + 1]; | |
568 | struct mcast_route_data *m; | |
569 | struct mcast_route_data mr; | |
570 | int iif = 0; | |
571 | int count; | |
572 | int oif[256]; | |
573 | int oif_count = 0; | |
574 | char sbuf[40]; | |
575 | char gbuf[40]; | |
576 | char oif_list[256] = "\0"; | |
577 | vrf_id_t vrf = ns_id; | |
43b5cc5e | 578 | int table; |
d62a17ae | 579 | |
580 | if (mroute) | |
581 | m = mroute; | |
582 | else { | |
583 | memset(&mr, 0, sizeof(mr)); | |
584 | m = &mr; | |
585 | } | |
586 | ||
587 | rtm = NLMSG_DATA(h); | |
588 | ||
589 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
590 | ||
591 | memset(tb, 0, sizeof tb); | |
592 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
90d82769 | 593 | |
43b5cc5e DS |
594 | if (tb[RTA_TABLE]) |
595 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
596 | else | |
597 | table = rtm->rtm_table; | |
598 | ||
599 | vrf = vrf_lookup_by_table(table); | |
600 | ||
d62a17ae | 601 | if (tb[RTA_IIF]) |
602 | iif = *(int *)RTA_DATA(tb[RTA_IIF]); | |
603 | ||
604 | if (tb[RTA_SRC]) | |
bd8b9272 | 605 | m->sg.src = *(struct in_addr *)RTA_DATA(tb[RTA_SRC]); |
d62a17ae | 606 | |
607 | if (tb[RTA_DST]) | |
bd8b9272 | 608 | m->sg.grp = *(struct in_addr *)RTA_DATA(tb[RTA_DST]); |
d62a17ae | 609 | |
610 | if ((RTA_EXPIRES <= RTA_MAX) && tb[RTA_EXPIRES]) | |
611 | m->lastused = *(unsigned long long *)RTA_DATA(tb[RTA_EXPIRES]); | |
612 | ||
613 | if (tb[RTA_MULTIPATH]) { | |
614 | struct rtnexthop *rtnh = | |
615 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
616 | ||
617 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
618 | for (;;) { | |
619 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
620 | break; | |
621 | ||
622 | oif[oif_count] = rtnh->rtnh_ifindex; | |
623 | oif_count++; | |
624 | ||
625 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
626 | rtnh = RTNH_NEXT(rtnh); | |
627 | } | |
628 | } | |
629 | ||
630 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
631 | struct interface *ifp; | |
0af35d90 RW |
632 | strlcpy(sbuf, inet_ntoa(m->sg.src), sizeof(sbuf)); |
633 | strlcpy(gbuf, inet_ntoa(m->sg.grp), sizeof(gbuf)); | |
d62a17ae | 634 | for (count = 0; count < oif_count; count++) { |
635 | ifp = if_lookup_by_index(oif[count], vrf); | |
636 | char temp[256]; | |
637 | ||
638 | sprintf(temp, "%s ", ifp->name); | |
639 | strcat(oif_list, temp); | |
640 | } | |
43b5cc5e | 641 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(vrf); |
d62a17ae | 642 | ifp = if_lookup_by_index(iif, vrf); |
43b5cc5e DS |
643 | zlog_debug( |
644 | "MCAST VRF: %s(%d) %s (%s,%s) IIF: %s OIF: %s jiffies: %lld", | |
645 | zvrf->vrf->name, vrf, nl_msg_type_to_str(h->nlmsg_type), | |
646 | sbuf, gbuf, ifp->name, oif_list, m->lastused); | |
90d82769 | 647 | } |
d62a17ae | 648 | return 0; |
565fdc75 DS |
649 | } |
650 | ||
d62a17ae | 651 | int netlink_route_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
652 | ns_id_t ns_id, int startup) | |
565fdc75 | 653 | { |
d62a17ae | 654 | int len; |
655 | vrf_id_t vrf_id = ns_id; | |
656 | struct rtmsg *rtm; | |
657 | ||
658 | rtm = NLMSG_DATA(h); | |
659 | ||
660 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) { | |
661 | /* If this is not route add/delete message print warning. */ | |
662 | zlog_warn("Kernel message: %d vrf %u\n", h->nlmsg_type, vrf_id); | |
663 | return 0; | |
664 | } | |
665 | ||
666 | /* Connected route. */ | |
667 | if (IS_ZEBRA_DEBUG_KERNEL) | |
668 | zlog_debug("%s %s %s proto %s vrf %u", | |
669 | nl_msg_type_to_str(h->nlmsg_type), | |
670 | nl_family_to_str(rtm->rtm_family), | |
671 | nl_rttype_to_str(rtm->rtm_type), | |
672 | nl_rtproto_to_str(rtm->rtm_protocol), vrf_id); | |
673 | ||
674 | /* We don't care about change notifications for the MPLS table. */ | |
675 | /* TODO: Revisit this. */ | |
676 | if (rtm->rtm_family == AF_MPLS) | |
677 | return 0; | |
678 | ||
679 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
680 | if (len < 0) | |
681 | return -1; | |
682 | ||
e655a03c | 683 | if (rtm->rtm_type == RTN_MULTICAST) |
d62a17ae | 684 | netlink_route_change_read_multicast(snl, h, ns_id, startup); |
e655a03c DL |
685 | else |
686 | netlink_route_change_read_unicast(snl, h, ns_id, startup); | |
d62a17ae | 687 | return 0; |
565fdc75 DS |
688 | } |
689 | ||
289602d7 | 690 | /* Request for specific route information from the kernel */ |
d62a17ae | 691 | static int netlink_request_route(struct zebra_ns *zns, int family, int type) |
289602d7 | 692 | { |
d62a17ae | 693 | struct { |
694 | struct nlmsghdr n; | |
695 | struct rtmsg rtm; | |
696 | } req; | |
697 | ||
698 | /* Form the request, specifying filter (rtattr) if needed. */ | |
699 | memset(&req, 0, sizeof(req)); | |
700 | req.n.nlmsg_type = type; | |
701 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
702 | req.rtm.rtm_family = family; | |
703 | ||
704 | return netlink_request(&zns->netlink_cmd, &req.n); | |
289602d7 | 705 | } |
706 | ||
718e3744 | 707 | /* Routing table read function using netlink interface. Only called |
708 | bootstrap time. */ | |
d62a17ae | 709 | int netlink_route_read(struct zebra_ns *zns) |
718e3744 | 710 | { |
d62a17ae | 711 | int ret; |
712 | ||
713 | /* Get IPv4 routing table. */ | |
714 | ret = netlink_request_route(zns, AF_INET, RTM_GETROUTE); | |
715 | if (ret < 0) | |
716 | return ret; | |
717 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
718 | &zns->netlink_cmd, zns, 0, 1); | |
719 | if (ret < 0) | |
720 | return ret; | |
721 | ||
722 | /* Get IPv6 routing table. */ | |
723 | ret = netlink_request_route(zns, AF_INET6, RTM_GETROUTE); | |
724 | if (ret < 0) | |
725 | return ret; | |
726 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
727 | &zns->netlink_cmd, zns, 0, 1); | |
728 | if (ret < 0) | |
729 | return ret; | |
730 | ||
731 | return 0; | |
718e3744 | 732 | } |
733 | ||
d62a17ae | 734 | static void _netlink_route_nl_add_gateway_info(u_char route_family, |
735 | u_char gw_family, | |
736 | struct nlmsghdr *nlmsg, | |
737 | size_t req_size, int bytelen, | |
738 | struct nexthop *nexthop) | |
40c7bdb0 | 739 | { |
d62a17ae | 740 | if (route_family == AF_MPLS) { |
741 | struct gw_family_t gw_fam; | |
742 | ||
743 | gw_fam.family = gw_family; | |
744 | if (gw_family == AF_INET) | |
745 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
746 | else | |
747 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
748 | addattr_l(nlmsg, req_size, RTA_VIA, &gw_fam.family, | |
749 | bytelen + 2); | |
750 | } else { | |
751 | if (gw_family == AF_INET) | |
752 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
753 | &nexthop->gate.ipv4, bytelen); | |
754 | else | |
755 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
756 | &nexthop->gate.ipv6, bytelen); | |
757 | } | |
40c7bdb0 | 758 | } |
759 | ||
d62a17ae | 760 | static void _netlink_route_rta_add_gateway_info(u_char route_family, |
761 | u_char gw_family, | |
762 | struct rtattr *rta, | |
763 | struct rtnexthop *rtnh, | |
764 | size_t req_size, int bytelen, | |
765 | struct nexthop *nexthop) | |
40c7bdb0 | 766 | { |
d62a17ae | 767 | if (route_family == AF_MPLS) { |
768 | struct gw_family_t gw_fam; | |
769 | ||
770 | gw_fam.family = gw_family; | |
771 | if (gw_family == AF_INET) | |
772 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
773 | else | |
774 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
775 | rta_addattr_l(rta, req_size, RTA_VIA, &gw_fam.family, | |
776 | bytelen + 2); | |
777 | rtnh->rtnh_len += RTA_LENGTH(bytelen + 2); | |
778 | } else { | |
779 | if (gw_family == AF_INET) | |
780 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
781 | &nexthop->gate.ipv4, bytelen); | |
782 | else | |
783 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
784 | &nexthop->gate.ipv6, bytelen); | |
785 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
786 | } | |
40c7bdb0 | 787 | } |
788 | ||
fa713d9e CF |
789 | /* This function takes a nexthop as argument and adds |
790 | * the appropriate netlink attributes to an existing | |
791 | * netlink message. | |
792 | * | |
793 | * @param routedesc: Human readable description of route type | |
794 | * (direct/recursive, single-/multipath) | |
795 | * @param bytelen: Length of addresses in bytes. | |
796 | * @param nexthop: Nexthop information | |
797 | * @param nlmsg: nlmsghdr structure to fill in. | |
798 | * @param req_size: The size allocated for the message. | |
799 | */ | |
d62a17ae | 800 | static void _netlink_route_build_singlepath(const char *routedesc, int bytelen, |
801 | struct nexthop *nexthop, | |
802 | struct nlmsghdr *nlmsg, | |
803 | struct rtmsg *rtmsg, | |
804 | size_t req_size, int cmd) | |
fa713d9e | 805 | { |
d62a17ae | 806 | struct nexthop_label *nh_label; |
807 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; | |
9a62e84b | 808 | char label_buf[256]; |
d62a17ae | 809 | |
810 | /* | |
811 | * label_buf is *only* currently used within debugging. | |
812 | * As such when we assign it we are guarding it inside | |
813 | * a debug test. If you want to change this make sure | |
814 | * you fix this assumption | |
815 | */ | |
816 | label_buf[0] = '\0'; | |
817 | /* outgoing label - either as NEWDST (in the case of LSR) or as ENCAP | |
818 | * (in the case of LER) | |
819 | */ | |
820 | nh_label = nexthop->nh_label; | |
821 | if (rtmsg->rtm_family == AF_MPLS) { | |
822 | assert(nh_label); | |
823 | assert(nh_label->num_labels == 1); | |
824 | } | |
825 | ||
826 | if (nh_label && nh_label->num_labels) { | |
827 | int i, num_labels = 0; | |
828 | u_int32_t bos; | |
829 | char label_buf1[20]; | |
830 | ||
831 | for (i = 0; i < nh_label->num_labels; i++) { | |
832 | if (nh_label->label[i] != MPLS_IMP_NULL_LABEL) { | |
833 | bos = ((i == (nh_label->num_labels - 1)) ? 1 | |
834 | : 0); | |
835 | out_lse[i] = mpls_lse_encode(nh_label->label[i], | |
836 | 0, 0, bos); | |
837 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
838 | if (!num_labels) | |
9a62e84b | 839 | sprintf(label_buf, "label %u", |
d62a17ae | 840 | nh_label->label[i]); |
841 | else { | |
9a62e84b | 842 | sprintf(label_buf1, "/%u", |
d62a17ae | 843 | nh_label->label[i]); |
9a62e84b RW |
844 | strlcat(label_buf, label_buf1, |
845 | sizeof(label_buf)); | |
d62a17ae | 846 | } |
847 | } | |
848 | num_labels++; | |
849 | } | |
850 | } | |
851 | if (num_labels) { | |
852 | if (rtmsg->rtm_family == AF_MPLS) | |
853 | addattr_l(nlmsg, req_size, RTA_NEWDST, &out_lse, | |
854 | num_labels * sizeof(mpls_lse_t)); | |
855 | else { | |
856 | struct rtattr *nest; | |
857 | u_int16_t encap = LWTUNNEL_ENCAP_MPLS; | |
858 | ||
859 | addattr_l(nlmsg, req_size, RTA_ENCAP_TYPE, | |
860 | &encap, sizeof(u_int16_t)); | |
861 | nest = addattr_nest(nlmsg, req_size, RTA_ENCAP); | |
862 | addattr_l(nlmsg, req_size, MPLS_IPTUNNEL_DST, | |
863 | &out_lse, | |
864 | num_labels * sizeof(mpls_lse_t)); | |
865 | addattr_nest_end(nlmsg, nest); | |
866 | } | |
66d42727 | 867 | } |
0aabccc0 | 868 | } |
fa713d9e | 869 | |
d62a17ae | 870 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
871 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
872 | ||
873 | if (rtmsg->rtm_family == AF_INET | |
874 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
875 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
876 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
877 | addattr_l(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4); | |
878 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
879 | ||
880 | if (nexthop->rmap_src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
881 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
882 | &nexthop->rmap_src.ipv4, bytelen); | |
883 | else if (nexthop->src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
884 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
885 | &nexthop->src.ipv4, bytelen); | |
886 | ||
887 | if (IS_ZEBRA_DEBUG_KERNEL) | |
888 | zlog_debug( | |
889 | " 5549: _netlink_route_build_singlepath() (%s): " | |
890 | "nexthop via %s %s if %u", | |
891 | routedesc, ipv4_ll_buf, label_buf, | |
892 | nexthop->ifindex); | |
893 | return; | |
0aabccc0 DD |
894 | } |
895 | ||
d62a17ae | 896 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
897 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
898 | /* Send deletes to the kernel without specifying the next-hop */ | |
899 | if (cmd != RTM_DELROUTE) | |
900 | _netlink_route_nl_add_gateway_info( | |
901 | rtmsg->rtm_family, AF_INET, nlmsg, req_size, | |
902 | bytelen, nexthop); | |
903 | ||
904 | if (cmd == RTM_NEWROUTE) { | |
905 | if (nexthop->rmap_src.ipv4.s_addr) | |
906 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
907 | &nexthop->rmap_src.ipv4, bytelen); | |
908 | else if (nexthop->src.ipv4.s_addr) | |
909 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
910 | &nexthop->src.ipv4, bytelen); | |
911 | } | |
912 | ||
913 | if (IS_ZEBRA_DEBUG_KERNEL) | |
914 | zlog_debug( | |
915 | "netlink_route_multipath() (%s): " | |
916 | "nexthop via %s %s if %u", | |
917 | routedesc, inet_ntoa(nexthop->gate.ipv4), | |
918 | label_buf, nexthop->ifindex); | |
0aabccc0 | 919 | } |
fa713d9e | 920 | |
d62a17ae | 921 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
922 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
923 | _netlink_route_nl_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
924 | nlmsg, req_size, bytelen, | |
925 | nexthop); | |
926 | ||
927 | if (cmd == RTM_NEWROUTE) { | |
928 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
929 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
930 | &nexthop->rmap_src.ipv6, bytelen); | |
931 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
932 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
933 | &nexthop->src.ipv6, bytelen); | |
934 | } | |
fa713d9e | 935 | |
d62a17ae | 936 | if (IS_ZEBRA_DEBUG_KERNEL) |
937 | zlog_debug( | |
938 | "netlink_route_multipath() (%s): " | |
939 | "nexthop via %s %s if %u", | |
940 | routedesc, inet6_ntoa(nexthop->gate.ipv6), | |
941 | label_buf, nexthop->ifindex); | |
942 | } | |
943 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX | |
944 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
945 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
946 | ||
947 | if (cmd == RTM_NEWROUTE) { | |
948 | if (nexthop->rmap_src.ipv4.s_addr) | |
949 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
950 | &nexthop->rmap_src.ipv4, bytelen); | |
951 | else if (nexthop->src.ipv4.s_addr) | |
952 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
953 | &nexthop->src.ipv4, bytelen); | |
954 | } | |
fa713d9e | 955 | |
d62a17ae | 956 | if (IS_ZEBRA_DEBUG_KERNEL) |
957 | zlog_debug( | |
958 | "netlink_route_multipath() (%s): " | |
959 | "nexthop via if %u", | |
960 | routedesc, nexthop->ifindex); | |
0aabccc0 DD |
961 | } |
962 | ||
d62a17ae | 963 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { |
964 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
965 | ||
966 | if (cmd == RTM_NEWROUTE) { | |
967 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
968 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
969 | &nexthop->rmap_src.ipv6, bytelen); | |
970 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
971 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
972 | &nexthop->src.ipv6, bytelen); | |
973 | } | |
974 | ||
975 | if (IS_ZEBRA_DEBUG_KERNEL) | |
976 | zlog_debug( | |
977 | "netlink_route_multipath() (%s): " | |
978 | "nexthop via if %u", | |
979 | routedesc, nexthop->ifindex); | |
980 | } | |
fa713d9e CF |
981 | } |
982 | ||
983 | /* This function takes a nexthop as argument and | |
984 | * appends to the given rtattr/rtnexthop pair the | |
985 | * representation of the nexthop. If the nexthop | |
986 | * defines a preferred source, the src parameter | |
987 | * will be modified to point to that src, otherwise | |
988 | * it will be kept unmodified. | |
989 | * | |
990 | * @param routedesc: Human readable description of route type | |
991 | * (direct/recursive, single-/multipath) | |
992 | * @param bytelen: Length of addresses in bytes. | |
993 | * @param nexthop: Nexthop information | |
994 | * @param rta: rtnetlink attribute structure | |
995 | * @param rtnh: pointer to an rtnetlink nexthop structure | |
996 | * @param src: pointer pointing to a location where | |
997 | * the prefsrc should be stored. | |
998 | */ | |
d62a17ae | 999 | static void _netlink_route_build_multipath(const char *routedesc, int bytelen, |
1000 | struct nexthop *nexthop, | |
1001 | struct rtattr *rta, | |
1002 | struct rtnexthop *rtnh, | |
1003 | struct rtmsg *rtmsg, | |
1004 | union g_addr **src) | |
fa713d9e | 1005 | { |
d62a17ae | 1006 | struct nexthop_label *nh_label; |
1007 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; | |
9a62e84b | 1008 | char label_buf[256]; |
d62a17ae | 1009 | |
1010 | rtnh->rtnh_len = sizeof(*rtnh); | |
1011 | rtnh->rtnh_flags = 0; | |
1012 | rtnh->rtnh_hops = 0; | |
1013 | rta->rta_len += rtnh->rtnh_len; | |
1014 | ||
1015 | /* | |
1016 | * label_buf is *only* currently used within debugging. | |
1017 | * As such when we assign it we are guarding it inside | |
1018 | * a debug test. If you want to change this make sure | |
1019 | * you fix this assumption | |
1020 | */ | |
1021 | label_buf[0] = '\0'; | |
1022 | /* outgoing label - either as NEWDST (in the case of LSR) or as ENCAP | |
1023 | * (in the case of LER) | |
1024 | */ | |
1025 | nh_label = nexthop->nh_label; | |
1026 | if (rtmsg->rtm_family == AF_MPLS) { | |
1027 | assert(nh_label); | |
1028 | assert(nh_label->num_labels == 1); | |
1029 | } | |
1030 | ||
1031 | if (nh_label && nh_label->num_labels) { | |
1032 | int i, num_labels = 0; | |
1033 | u_int32_t bos; | |
1034 | char label_buf1[20]; | |
1035 | ||
1036 | for (i = 0; i < nh_label->num_labels; i++) { | |
1037 | if (nh_label->label[i] != MPLS_IMP_NULL_LABEL) { | |
1038 | bos = ((i == (nh_label->num_labels - 1)) ? 1 | |
1039 | : 0); | |
1040 | out_lse[i] = mpls_lse_encode(nh_label->label[i], | |
1041 | 0, 0, bos); | |
1042 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
1043 | if (!num_labels) | |
9a62e84b | 1044 | sprintf(label_buf, "label %u", |
d62a17ae | 1045 | nh_label->label[i]); |
1046 | else { | |
9a62e84b | 1047 | sprintf(label_buf1, "/%u", |
d62a17ae | 1048 | nh_label->label[i]); |
9a62e84b RW |
1049 | strlcat(label_buf, label_buf1, |
1050 | sizeof(label_buf)); | |
d62a17ae | 1051 | } |
1052 | } | |
1053 | num_labels++; | |
1054 | } | |
1055 | } | |
1056 | if (num_labels) { | |
1057 | if (rtmsg->rtm_family == AF_MPLS) { | |
1058 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_NEWDST, | |
1059 | &out_lse, | |
1060 | num_labels * sizeof(mpls_lse_t)); | |
1061 | rtnh->rtnh_len += RTA_LENGTH( | |
1062 | num_labels * sizeof(mpls_lse_t)); | |
1063 | } else { | |
1064 | struct rtattr *nest; | |
1065 | u_int16_t encap = LWTUNNEL_ENCAP_MPLS; | |
1066 | int len = rta->rta_len; | |
1067 | ||
1068 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, | |
1069 | RTA_ENCAP_TYPE, &encap, | |
1070 | sizeof(u_int16_t)); | |
1071 | nest = rta_nest(rta, NL_PKT_BUF_SIZE, | |
1072 | RTA_ENCAP); | |
1073 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, | |
1074 | MPLS_IPTUNNEL_DST, &out_lse, | |
1075 | num_labels * sizeof(mpls_lse_t)); | |
1076 | rta_nest_end(rta, nest); | |
1077 | rtnh->rtnh_len += rta->rta_len - len; | |
1078 | } | |
66d42727 | 1079 | } |
d62a17ae | 1080 | } |
1081 | ||
1082 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
1083 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1084 | ||
1085 | if (rtmsg->rtm_family == AF_INET | |
1086 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1087 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
1088 | bytelen = 4; | |
1089 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1090 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_GATEWAY, &ipv4_ll, | |
1091 | bytelen); | |
1092 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
1093 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1094 | ||
1095 | if (nexthop->rmap_src.ipv4.s_addr) | |
1096 | *src = &nexthop->rmap_src; | |
1097 | else if (nexthop->src.ipv4.s_addr) | |
1098 | *src = &nexthop->src; | |
1099 | ||
1100 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1101 | zlog_debug( | |
1102 | " 5549: netlink_route_build_multipath() (%s): " | |
1103 | "nexthop via %s %s if %u", | |
1104 | routedesc, ipv4_ll_buf, label_buf, | |
1105 | nexthop->ifindex); | |
1106 | return; | |
1107 | } | |
1108 | ||
1109 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
1110 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1111 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET, | |
1112 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1113 | bytelen, nexthop); | |
1114 | if (nexthop->rmap_src.ipv4.s_addr) | |
1115 | *src = &nexthop->rmap_src; | |
1116 | else if (nexthop->src.ipv4.s_addr) | |
1117 | *src = &nexthop->src; | |
1118 | ||
1119 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1120 | zlog_debug( | |
1121 | "netlink_route_multipath() (%s): " | |
1122 | "nexthop via %s %s if %u", | |
1123 | routedesc, inet_ntoa(nexthop->gate.ipv4), | |
1124 | label_buf, nexthop->ifindex); | |
1125 | } | |
1126 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1127 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1128 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
1129 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1130 | bytelen, nexthop); | |
1131 | ||
1132 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1133 | *src = &nexthop->rmap_src; | |
1134 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1135 | *src = &nexthop->src; | |
1136 | ||
1137 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1138 | zlog_debug( | |
1139 | "netlink_route_multipath() (%s): " | |
1140 | "nexthop via %s %s if %u", | |
1141 | routedesc, inet6_ntoa(nexthop->gate.ipv6), | |
1142 | label_buf, nexthop->ifindex); | |
1143 | } | |
1144 | /* ifindex */ | |
1145 | if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
1146 | || nexthop->type == NEXTHOP_TYPE_IFINDEX) { | |
1147 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1148 | ||
1149 | if (nexthop->rmap_src.ipv4.s_addr) | |
1150 | *src = &nexthop->rmap_src; | |
1151 | else if (nexthop->src.ipv4.s_addr) | |
1152 | *src = &nexthop->src; | |
1153 | ||
1154 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1155 | zlog_debug( | |
1156 | "netlink_route_multipath() (%s): " | |
1157 | "nexthop via if %u", | |
1158 | routedesc, nexthop->ifindex); | |
1159 | } else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1160 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1161 | ||
1162 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1163 | zlog_debug( | |
1164 | "netlink_route_multipath() (%s): " | |
1165 | "nexthop via if %u", | |
1166 | routedesc, nexthop->ifindex); | |
1167 | } else { | |
1168 | rtnh->rtnh_ifindex = 0; | |
1169 | } | |
fa713d9e CF |
1170 | } |
1171 | ||
d62a17ae | 1172 | static inline void _netlink_mpls_build_singlepath(const char *routedesc, |
1173 | zebra_nhlfe_t *nhlfe, | |
1174 | struct nlmsghdr *nlmsg, | |
1175 | struct rtmsg *rtmsg, | |
1176 | size_t req_size, int cmd) | |
40c7bdb0 | 1177 | { |
d62a17ae | 1178 | int bytelen; |
1179 | u_char family; | |
40c7bdb0 | 1180 | |
d62a17ae | 1181 | family = NHLFE_FAMILY(nhlfe); |
1182 | bytelen = (family == AF_INET ? 4 : 16); | |
1183 | _netlink_route_build_singlepath(routedesc, bytelen, nhlfe->nexthop, | |
1184 | nlmsg, rtmsg, req_size, cmd); | |
40c7bdb0 | 1185 | } |
1186 | ||
1187 | ||
1188 | static inline void | |
d62a17ae | 1189 | _netlink_mpls_build_multipath(const char *routedesc, zebra_nhlfe_t *nhlfe, |
1190 | struct rtattr *rta, struct rtnexthop *rtnh, | |
1191 | struct rtmsg *rtmsg, union g_addr **src) | |
40c7bdb0 | 1192 | { |
d62a17ae | 1193 | int bytelen; |
1194 | u_char family; | |
40c7bdb0 | 1195 | |
d62a17ae | 1196 | family = NHLFE_FAMILY(nhlfe); |
1197 | bytelen = (family == AF_INET ? 4 : 16); | |
1198 | _netlink_route_build_multipath(routedesc, bytelen, nhlfe->nexthop, rta, | |
1199 | rtnh, rtmsg, src); | |
40c7bdb0 | 1200 | } |
1201 | ||
1202 | ||
fa713d9e CF |
1203 | /* Log debug information for netlink_route_multipath |
1204 | * if debug logging is enabled. | |
1205 | * | |
1206 | * @param cmd: Netlink command which is to be processed | |
1207 | * @param p: Prefix for which the change is due | |
1208 | * @param nexthop: Nexthop which is currently processed | |
1209 | * @param routedesc: Semantic annotation for nexthop | |
1210 | * (recursive, multipath, etc.) | |
1211 | * @param family: Address family which the change concerns | |
1212 | */ | |
d62a17ae | 1213 | static void _netlink_route_debug(int cmd, struct prefix *p, |
1214 | struct nexthop *nexthop, const char *routedesc, | |
1215 | int family, struct zebra_vrf *zvrf) | |
fa713d9e | 1216 | { |
d62a17ae | 1217 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1218 | char buf[PREFIX_STRLEN]; | |
1219 | zlog_debug( | |
1220 | "netlink_route_multipath() (%s): %s %s vrf %u type %s", | |
1221 | routedesc, nl_msg_type_to_str(cmd), | |
1222 | prefix2str(p, buf, sizeof(buf)), zvrf_id(zvrf), | |
1223 | (nexthop) ? nexthop_type_to_str(nexthop->type) : "UNK"); | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | static void _netlink_mpls_debug(int cmd, u_int32_t label, const char *routedesc) | |
40c7bdb0 | 1228 | { |
d62a17ae | 1229 | if (IS_ZEBRA_DEBUG_KERNEL) |
1230 | zlog_debug("netlink_mpls_multipath() (%s): %s %u/20", routedesc, | |
1231 | nl_msg_type_to_str(cmd), label); | |
fa713d9e CF |
1232 | } |
1233 | ||
d62a17ae | 1234 | static int netlink_neigh_update(int cmd, int ifindex, uint32_t addr, char *lla, |
1235 | int llalen) | |
5c610faf | 1236 | { |
d62a17ae | 1237 | struct { |
1238 | struct nlmsghdr n; | |
1239 | struct ndmsg ndm; | |
1240 | char buf[256]; | |
1241 | } req; | |
5c610faf | 1242 | |
d62a17ae | 1243 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); |
8f7d9fc0 | 1244 | |
d62a17ae | 1245 | memset(&req.n, 0, sizeof(req.n)); |
1246 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
5c610faf | 1247 | |
d62a17ae | 1248 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
1249 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1250 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
1251 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
a55ba23f | 1252 | |
d62a17ae | 1253 | req.ndm.ndm_family = AF_INET; |
1254 | req.ndm.ndm_state = NUD_PERMANENT; | |
1255 | req.ndm.ndm_ifindex = ifindex; | |
1256 | req.ndm.ndm_type = RTN_UNICAST; | |
5c610faf | 1257 | |
d62a17ae | 1258 | addattr_l(&req.n, sizeof(req), NDA_DST, &addr, 4); |
1259 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, lla, llalen); | |
5c610faf | 1260 | |
d62a17ae | 1261 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, |
1262 | 0); | |
5c610faf DS |
1263 | } |
1264 | ||
718e3744 | 1265 | /* Routing table change via netlink interface. */ |
6ae24471 | 1266 | /* Update flag indicates whether this is a "replace" or not. */ |
d62a17ae | 1267 | static int netlink_route_multipath(int cmd, struct prefix *p, |
1268 | struct prefix *src_p, struct route_entry *re, | |
1269 | int update) | |
718e3744 | 1270 | { |
d62a17ae | 1271 | int bytelen; |
1272 | struct sockaddr_nl snl; | |
1273 | struct nexthop *nexthop = NULL; | |
1274 | unsigned int nexthop_num; | |
a8309422 | 1275 | int discard = 0; |
d62a17ae | 1276 | int family = PREFIX_FAMILY(p); |
1277 | const char *routedesc; | |
1278 | int setsrc = 0; | |
1279 | union g_addr src; | |
1280 | ||
1281 | struct { | |
1282 | struct nlmsghdr n; | |
1283 | struct rtmsg r; | |
1284 | char buf[NL_PKT_BUF_SIZE]; | |
1285 | } req; | |
1286 | ||
1287 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
1288 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); | |
1289 | ||
1290 | memset(&req, 0, sizeof req - NL_PKT_BUF_SIZE); | |
1291 | ||
1292 | bytelen = (family == AF_INET ? 4 : 16); | |
1293 | ||
1294 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
1295 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1296 | if ((cmd == RTM_NEWROUTE) && update) | |
1297 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
1298 | req.n.nlmsg_type = cmd; | |
1299 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
1300 | ||
1301 | req.r.rtm_family = family; | |
1302 | req.r.rtm_dst_len = p->prefixlen; | |
1303 | req.r.rtm_src_len = src_p ? src_p->prefixlen : 0; | |
915902cb | 1304 | req.r.rtm_protocol = zebra2proto(re->type); |
d62a17ae | 1305 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
a8309422 | 1306 | req.r.rtm_type = RTN_UNICAST; |
d62a17ae | 1307 | |
d62a17ae | 1308 | addattr_l(&req.n, sizeof req, RTA_DST, &p->u.prefix, bytelen); |
1309 | if (src_p) | |
1310 | addattr_l(&req.n, sizeof req, RTA_SRC, &src_p->u.prefix, | |
1311 | bytelen); | |
1312 | ||
1313 | /* Metric. */ | |
1314 | /* Hardcode the metric for all routes coming from zebra. Metric isn't | |
1315 | * used | |
1316 | * either by the kernel or by zebra. Its purely for calculating best | |
1317 | * path(s) | |
1318 | * by the routing protocol and for communicating with protocol peers. | |
1319 | */ | |
1320 | addattr32(&req.n, sizeof req, RTA_PRIORITY, NL_DEFAULT_ROUTE_METRIC); | |
4e40b6d6 KK |
1321 | #if defined(SUPPORT_REALMS) |
1322 | if (re->tag > 0 && re->tag <= 255) | |
1323 | addattr32(&req.n, sizeof req, RTA_FLOW, re->tag); | |
1324 | #endif | |
d62a17ae | 1325 | /* Table corresponding to this route. */ |
1326 | if (re->table < 256) | |
1327 | req.r.rtm_table = re->table; | |
1328 | else { | |
1329 | req.r.rtm_table = RT_TABLE_UNSPEC; | |
1330 | addattr32(&req.n, sizeof req, RTA_TABLE, re->table); | |
0aabccc0 | 1331 | } |
718e3744 | 1332 | |
a8309422 DL |
1333 | if (discard) |
1334 | goto skip; | |
1335 | ||
d62a17ae | 1336 | if (re->mtu || re->nexthop_mtu) { |
1337 | char buf[NL_PKT_BUF_SIZE]; | |
1338 | struct rtattr *rta = (void *)buf; | |
1339 | u_int32_t mtu = re->mtu; | |
1340 | if (!mtu || (re->nexthop_mtu && re->nexthop_mtu < mtu)) | |
1341 | mtu = re->nexthop_mtu; | |
1342 | rta->rta_type = RTA_METRICS; | |
1343 | rta->rta_len = RTA_LENGTH(0); | |
1344 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTAX_MTU, &mtu, sizeof mtu); | |
1345 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_METRICS, RTA_DATA(rta), | |
1346 | RTA_PAYLOAD(rta)); | |
1347 | } | |
1348 | ||
d62a17ae | 1349 | /* Count overall nexthops so we can decide whether to use singlepath |
1350 | * or multipath case. */ | |
1351 | nexthop_num = 0; | |
1352 | for (ALL_NEXTHOPS(re->nexthop, nexthop)) { | |
1353 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1354 | continue; | |
1355 | if (cmd == RTM_NEWROUTE | |
25b9cb0c | 1356 | && !NEXTHOP_IS_ACTIVE(nexthop->flags)) |
d62a17ae | 1357 | continue; |
1358 | if (cmd == RTM_DELROUTE | |
1359 | && !CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1360 | continue; | |
1361 | ||
1362 | nexthop_num++; | |
1363 | } | |
1364 | ||
1365 | /* Singlepath case. */ | |
1366 | if (nexthop_num == 1 || multipath_num == 1) { | |
1367 | nexthop_num = 0; | |
1368 | for (ALL_NEXTHOPS(re->nexthop, nexthop)) { | |
1f1d24a8 DS |
1369 | /* |
1370 | * So we want to cover 2 types of blackhole | |
1371 | * routes here: | |
1372 | * 1) A normal blackhole route( ala from a static | |
1373 | * install. | |
1374 | * 2) A recursively resolved blackhole route | |
1375 | */ | |
1376 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) { | |
1377 | switch (nexthop->bh_type) { | |
1378 | case BLACKHOLE_ADMINPROHIB: | |
1379 | req.r.rtm_type = RTN_PROHIBIT; | |
1380 | break; | |
1381 | case BLACKHOLE_REJECT: | |
1382 | req.r.rtm_type = RTN_UNREACHABLE; | |
1383 | break; | |
1384 | default: | |
1385 | req.r.rtm_type = RTN_BLACKHOLE; | |
1386 | break; | |
1387 | } | |
1388 | goto skip; | |
1389 | } | |
d62a17ae | 1390 | if (CHECK_FLAG(nexthop->flags, |
1391 | NEXTHOP_FLAG_RECURSIVE)) { | |
1392 | if (!setsrc) { | |
1393 | if (family == AF_INET) { | |
1394 | if (nexthop->rmap_src.ipv4 | |
1395 | .s_addr | |
1396 | != 0) { | |
1397 | src.ipv4 = | |
1398 | nexthop->rmap_src | |
1399 | .ipv4; | |
1400 | setsrc = 1; | |
1401 | } else if (nexthop->src.ipv4 | |
1402 | .s_addr | |
1403 | != 0) { | |
1404 | src.ipv4 = | |
1405 | nexthop->src | |
1406 | .ipv4; | |
1407 | setsrc = 1; | |
1408 | } | |
1409 | } else if (family == AF_INET6) { | |
1410 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1411 | &nexthop->rmap_src | |
1412 | .ipv6)) { | |
1413 | src.ipv6 = | |
1414 | nexthop->rmap_src | |
1415 | .ipv6; | |
1416 | setsrc = 1; | |
1417 | } else if ( | |
1418 | !IN6_IS_ADDR_UNSPECIFIED( | |
1419 | &nexthop->src | |
1420 | .ipv6)) { | |
1421 | src.ipv6 = | |
1422 | nexthop->src | |
1423 | .ipv6; | |
1424 | setsrc = 1; | |
1425 | } | |
1426 | } | |
1427 | } | |
1428 | continue; | |
1429 | } | |
1430 | ||
1431 | if ((cmd == RTM_NEWROUTE | |
25b9cb0c | 1432 | && NEXTHOP_IS_ACTIVE(nexthop->flags)) |
d62a17ae | 1433 | || (cmd == RTM_DELROUTE |
1434 | && CHECK_FLAG(nexthop->flags, | |
1435 | NEXTHOP_FLAG_FIB))) { | |
1436 | routedesc = nexthop->rparent | |
8b1450b9 RW |
1437 | ? "recursive, single-path" |
1438 | : "single-path"; | |
d62a17ae | 1439 | |
1440 | _netlink_route_debug(cmd, p, nexthop, routedesc, | |
1441 | family, zvrf); | |
1442 | _netlink_route_build_singlepath( | |
1443 | routedesc, bytelen, nexthop, &req.n, | |
1444 | &req.r, sizeof req, cmd); | |
1445 | nexthop_num++; | |
1446 | break; | |
1447 | } | |
1448 | } | |
1449 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1450 | if (family == AF_INET) | |
1451 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1452 | &src.ipv4, bytelen); | |
1453 | else if (family == AF_INET6) | |
1454 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1455 | &src.ipv6, bytelen); | |
1456 | } | |
1457 | } else { | |
1458 | char buf[NL_PKT_BUF_SIZE]; | |
1459 | struct rtattr *rta = (void *)buf; | |
1460 | struct rtnexthop *rtnh; | |
1461 | union g_addr *src1 = NULL; | |
1462 | ||
1463 | rta->rta_type = RTA_MULTIPATH; | |
1464 | rta->rta_len = RTA_LENGTH(0); | |
1465 | rtnh = RTA_DATA(rta); | |
1466 | ||
1467 | nexthop_num = 0; | |
1468 | for (ALL_NEXTHOPS(re->nexthop, nexthop)) { | |
1469 | if (nexthop_num >= multipath_num) | |
1470 | break; | |
1471 | ||
1472 | if (CHECK_FLAG(nexthop->flags, | |
1473 | NEXTHOP_FLAG_RECURSIVE)) { | |
1474 | /* This only works for IPv4 now */ | |
1475 | if (!setsrc) { | |
1476 | if (family == AF_INET) { | |
1477 | if (nexthop->rmap_src.ipv4 | |
1478 | .s_addr | |
1479 | != 0) { | |
1480 | src.ipv4 = | |
1481 | nexthop->rmap_src | |
1482 | .ipv4; | |
1483 | setsrc = 1; | |
1484 | } else if (nexthop->src.ipv4 | |
1485 | .s_addr | |
1486 | != 0) { | |
1487 | src.ipv4 = | |
1488 | nexthop->src | |
1489 | .ipv4; | |
1490 | setsrc = 1; | |
1491 | } | |
1492 | } else if (family == AF_INET6) { | |
1493 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1494 | &nexthop->rmap_src | |
1495 | .ipv6)) { | |
1496 | src.ipv6 = | |
1497 | nexthop->rmap_src | |
1498 | .ipv6; | |
1499 | setsrc = 1; | |
1500 | } else if ( | |
1501 | !IN6_IS_ADDR_UNSPECIFIED( | |
1502 | &nexthop->src | |
1503 | .ipv6)) { | |
1504 | src.ipv6 = | |
1505 | nexthop->src | |
1506 | .ipv6; | |
1507 | setsrc = 1; | |
1508 | } | |
1509 | } | |
1510 | } | |
1511 | continue; | |
1512 | } | |
1513 | ||
1514 | if ((cmd == RTM_NEWROUTE | |
25b9cb0c | 1515 | && NEXTHOP_IS_ACTIVE(nexthop->flags)) |
d62a17ae | 1516 | || (cmd == RTM_DELROUTE |
1517 | && CHECK_FLAG(nexthop->flags, | |
1518 | NEXTHOP_FLAG_FIB))) { | |
1519 | routedesc = nexthop->rparent | |
8b1450b9 RW |
1520 | ? "recursive, multipath" |
1521 | : "multipath"; | |
d62a17ae | 1522 | nexthop_num++; |
1523 | ||
1524 | _netlink_route_debug(cmd, p, nexthop, routedesc, | |
1525 | family, zvrf); | |
1526 | _netlink_route_build_multipath( | |
1527 | routedesc, bytelen, nexthop, rta, rtnh, | |
1528 | &req.r, &src1); | |
1529 | rtnh = RTNH_NEXT(rtnh); | |
1530 | ||
1531 | if (!setsrc && src1) { | |
1532 | if (family == AF_INET) | |
1533 | src.ipv4 = src1->ipv4; | |
1534 | else if (family == AF_INET6) | |
1535 | src.ipv6 = src1->ipv6; | |
1536 | ||
1537 | setsrc = 1; | |
1538 | } | |
1539 | } | |
1540 | } | |
1541 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1542 | if (family == AF_INET) | |
1543 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1544 | &src.ipv4, bytelen); | |
1545 | else if (family == AF_INET6) | |
1546 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1547 | &src.ipv6, bytelen); | |
1548 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1549 | zlog_debug("Setting source"); | |
1550 | } | |
1551 | ||
1552 | if (rta->rta_len > RTA_LENGTH(0)) | |
1553 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
1554 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
1555 | } | |
718e3744 | 1556 | |
d62a17ae | 1557 | /* If there is no useful nexthop then return. */ |
1558 | if (nexthop_num == 0) { | |
1559 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1560 | zlog_debug( | |
1561 | "netlink_route_multipath(): No useful nexthop."); | |
1562 | return 0; | |
1563 | } | |
718e3744 | 1564 | |
7021c425 | 1565 | skip: |
718e3744 | 1566 | |
d62a17ae | 1567 | /* Destination netlink address. */ |
1568 | memset(&snl, 0, sizeof snl); | |
1569 | snl.nl_family = AF_NETLINK; | |
718e3744 | 1570 | |
d62a17ae | 1571 | /* Talk to netlink socket. */ |
1572 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
1573 | 0); | |
718e3744 | 1574 | } |
1575 | ||
43b5cc5e | 1576 | int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *in) |
e3be0432 | 1577 | { |
d62a17ae | 1578 | int suc = 0; |
1579 | struct mcast_route_data *mr = (struct mcast_route_data *)in; | |
bd8b9272 DS |
1580 | struct { |
1581 | struct nlmsghdr n; | |
1582 | struct ndmsg ndm; | |
1583 | char buf[256]; | |
1584 | } req; | |
e3be0432 | 1585 | |
d62a17ae | 1586 | mroute = mr; |
bd8b9272 DS |
1587 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); |
1588 | ||
1589 | memset(&req.n, 0, sizeof(req.n)); | |
1590 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1591 | ||
1592 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1593 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1594 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
1595 | ||
1596 | req.ndm.ndm_family = RTNL_FAMILY_IPMR; | |
1597 | req.n.nlmsg_type = RTM_GETROUTE; | |
1598 | ||
1599 | addattr_l(&req.n, sizeof(req), RTA_IIF, &mroute->ifindex, 4); | |
1600 | addattr_l(&req.n, sizeof(req), RTA_OIF, &mroute->ifindex, 4); | |
1601 | addattr_l(&req.n, sizeof(req), RTA_SRC, &mroute->sg.src.s_addr, 4); | |
1602 | addattr_l(&req.n, sizeof(req), RTA_DST, &mroute->sg.grp.s_addr, 4); | |
1603 | addattr_l(&req.n, sizeof(req), RTA_TABLE, &zvrf->table_id, 4); | |
e3be0432 | 1604 | |
bd8b9272 DS |
1605 | suc = netlink_talk(netlink_route_change_read_multicast, &req.n, |
1606 | &zns->netlink_cmd, zns, 0); | |
e3be0432 | 1607 | |
bd8b9272 | 1608 | mroute = NULL; |
d62a17ae | 1609 | return suc; |
e3be0432 DS |
1610 | } |
1611 | ||
0c555cc6 DS |
1612 | void kernel_route_rib(struct prefix *p, struct prefix *src_p, |
1613 | struct route_entry *old, struct route_entry *new) | |
718e3744 | 1614 | { |
0c555cc6 DS |
1615 | int ret = 0; |
1616 | ||
0af35d90 RW |
1617 | assert(old || new); |
1618 | ||
0c555cc6 DS |
1619 | if (new) { |
1620 | if (p->family == AF_INET) | |
1621 | ret = netlink_route_multipath(RTM_NEWROUTE, p, src_p, | |
1622 | new, (old) ? 1 : 0); | |
1623 | else { | |
1624 | /* | |
1625 | * So v6 route replace semantics are not in | |
1626 | * the kernel at this point as I understand it. | |
1627 | * So let's do a delete than an add. | |
1628 | * In the future once v6 route replace semantics | |
1629 | * are in we can figure out what to do here to | |
1630 | * allow working with old and new kernels. | |
1631 | * | |
1632 | * I'm also intentionally ignoring the failure case | |
1633 | * of the route delete. If that happens yeah we're | |
1634 | * screwed. | |
1635 | */ | |
1636 | if (old) | |
1637 | netlink_route_multipath(RTM_DELROUTE, p, | |
1638 | src_p, old, 0); | |
1639 | ret = netlink_route_multipath(RTM_NEWROUTE, p, | |
1640 | src_p, new, 0); | |
1641 | } | |
1642 | kernel_route_rib_pass_fail(p, new, | |
1643 | (!ret) ? | |
1644 | SOUTHBOUND_INSTALL_SUCCESS : | |
1645 | SOUTHBOUND_INSTALL_FAILURE); | |
1646 | return; | |
1647 | } | |
718e3744 | 1648 | |
0c555cc6 DS |
1649 | if (old) { |
1650 | ret = netlink_route_multipath(RTM_DELROUTE, p, src_p, old, 0); | |
e7fcb843 | 1651 | |
0c555cc6 DS |
1652 | kernel_route_rib_pass_fail(p, old, |
1653 | (!ret) ? | |
1654 | SOUTHBOUND_DELETE_SUCCESS : | |
1655 | SOUTHBOUND_DELETE_FAILURE); | |
1656 | } | |
718e3744 | 1657 | } |
1658 | ||
d62a17ae | 1659 | int kernel_neigh_update(int add, int ifindex, uint32_t addr, char *lla, |
1660 | int llalen) | |
6b8a5694 | 1661 | { |
d62a17ae | 1662 | return netlink_neigh_update(add ? RTM_NEWNEIGH : RTM_DELNEIGH, ifindex, |
1663 | addr, lla, llalen); | |
6b8a5694 | 1664 | } |
718e3744 | 1665 | |
13d60d35 | 1666 | /* |
1667 | * Add remote VTEP to the flood list for this VxLAN interface (VNI). This | |
1668 | * is done by adding an FDB entry with a MAC of 00:00:00:00:00:00. | |
1669 | */ | |
d62a17ae | 1670 | static int netlink_vxlan_flood_list_update(struct interface *ifp, |
1671 | struct in_addr *vtep_ip, int cmd) | |
13d60d35 | 1672 | { |
d62a17ae | 1673 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); |
1674 | struct { | |
1675 | struct nlmsghdr n; | |
1676 | struct ndmsg ndm; | |
1677 | char buf[256]; | |
1678 | } req; | |
1679 | u_char dst_mac[6] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; | |
1680 | ||
1681 | memset(&req.n, 0, sizeof(req.n)); | |
1682 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1683 | ||
1684 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1685 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1686 | if (cmd == RTM_NEWNEIGH) | |
1687 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_APPEND); | |
1688 | req.n.nlmsg_type = cmd; | |
1689 | req.ndm.ndm_family = PF_BRIDGE; | |
1690 | req.ndm.ndm_state = NUD_NOARP | NUD_PERMANENT; | |
1691 | req.ndm.ndm_flags |= NTF_SELF; // Handle by "self", not "master" | |
1692 | ||
1693 | ||
1694 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, &dst_mac, 6); | |
1695 | req.ndm.ndm_ifindex = ifp->ifindex; | |
1696 | addattr_l(&req.n, sizeof(req), NDA_DST, &vtep_ip->s_addr, 4); | |
1697 | ||
1698 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
1699 | 0); | |
13d60d35 | 1700 | } |
1701 | ||
1702 | /* | |
d62a17ae | 1703 | * Add remote VTEP for this VxLAN interface (VNI). In Linux, this involves |
1704 | * adding | |
13d60d35 | 1705 | * a "flood" MAC FDB entry. |
1706 | */ | |
d62a17ae | 1707 | int kernel_add_vtep(vni_t vni, struct interface *ifp, struct in_addr *vtep_ip) |
13d60d35 | 1708 | { |
d62a17ae | 1709 | if (IS_ZEBRA_DEBUG_VXLAN) |
1710 | zlog_debug("Install %s into flood list for VNI %u intf %s(%u)", | |
1711 | inet_ntoa(*vtep_ip), vni, ifp->name, ifp->ifindex); | |
13d60d35 | 1712 | |
d62a17ae | 1713 | return netlink_vxlan_flood_list_update(ifp, vtep_ip, RTM_NEWNEIGH); |
13d60d35 | 1714 | } |
1715 | ||
1716 | /* | |
1717 | * Remove remote VTEP for this VxLAN interface (VNI). In Linux, this involves | |
1718 | * deleting the "flood" MAC FDB entry. | |
1719 | */ | |
d62a17ae | 1720 | int kernel_del_vtep(vni_t vni, struct interface *ifp, struct in_addr *vtep_ip) |
13d60d35 | 1721 | { |
d62a17ae | 1722 | if (IS_ZEBRA_DEBUG_VXLAN) |
1723 | zlog_debug( | |
1724 | "Uninstall %s from flood list for VNI %u intf %s(%u)", | |
1725 | inet_ntoa(*vtep_ip), vni, ifp->name, ifp->ifindex); | |
13d60d35 | 1726 | |
d62a17ae | 1727 | return netlink_vxlan_flood_list_update(ifp, vtep_ip, RTM_DELNEIGH); |
13d60d35 | 1728 | } |
1729 | ||
2232a77c | 1730 | #ifndef NDA_RTA |
d62a17ae | 1731 | #define NDA_RTA(r) \ |
1732 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) | |
2232a77c | 1733 | #endif |
1734 | ||
d62a17ae | 1735 | static int netlink_macfdb_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
1736 | int len) | |
2232a77c | 1737 | { |
d62a17ae | 1738 | struct ndmsg *ndm; |
1739 | struct interface *ifp; | |
1740 | struct zebra_if *zif; | |
d62a17ae | 1741 | struct rtattr *tb[NDA_MAX + 1]; |
1742 | struct interface *br_if; | |
1743 | struct ethaddr mac; | |
1744 | vlanid_t vid = 0; | |
1745 | struct prefix vtep_ip; | |
1746 | int vid_present = 0, dst_present = 0; | |
1747 | char buf[ETHER_ADDR_STRLEN]; | |
1748 | char vid_buf[20]; | |
1749 | char dst_buf[30]; | |
1750 | u_char sticky = 0; | |
1751 | ||
1752 | ndm = NLMSG_DATA(h); | |
1753 | ||
2853fed6 | 1754 | /* We only process macfdb notifications if EVPN is enabled */ |
1755 | if (!is_evpn_enabled()) | |
1756 | return 0; | |
1757 | ||
d62a17ae | 1758 | /* The interface should exist. */ |
1759 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT), | |
1760 | ndm->ndm_ifindex); | |
2853fed6 | 1761 | if (!ifp || !ifp->info) |
d62a17ae | 1762 | return 0; |
1763 | ||
1764 | /* The interface should be something we're interested in. */ | |
1765 | if (!IS_ZEBRA_IF_BRIDGE_SLAVE(ifp)) | |
1766 | return 0; | |
1767 | ||
1768 | /* Drop "permanent" entries. */ | |
1769 | if (ndm->ndm_state & NUD_PERMANENT) | |
1770 | return 0; | |
1771 | ||
1772 | zif = (struct zebra_if *)ifp->info; | |
1773 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
1774 | zlog_warn("%s family %s IF %s(%u) brIF %u - no bridge master", | |
1775 | nl_msg_type_to_str(h->nlmsg_type), | |
1776 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1777 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex); | |
1778 | return 0; | |
1779 | } | |
1780 | ||
1781 | /* Parse attributes and extract fields of interest. */ | |
1782 | memset(tb, 0, sizeof tb); | |
1783 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
1784 | ||
1785 | if (!tb[NDA_LLADDR]) { | |
1786 | zlog_warn("%s family %s IF %s(%u) brIF %u - no LLADDR", | |
1787 | nl_msg_type_to_str(h->nlmsg_type), | |
1788 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1789 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex); | |
1790 | return 0; | |
1791 | } | |
1792 | ||
ff8b7eb8 | 1793 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
d62a17ae | 1794 | zlog_warn( |
df0b13cf | 1795 | "%s family %s IF %s(%u) brIF %u - LLADDR is not MAC, len %lu", |
d62a17ae | 1796 | nl_msg_type_to_str(h->nlmsg_type), |
1797 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1798 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex, | |
df0b13cf | 1799 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); |
d62a17ae | 1800 | return 0; |
1801 | } | |
1802 | ||
ff8b7eb8 | 1803 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 1804 | |
1805 | if ((NDA_VLAN <= NDA_MAX) && tb[NDA_VLAN]) { | |
1806 | vid_present = 1; | |
1807 | vid = *(u_int16_t *)RTA_DATA(tb[NDA_VLAN]); | |
1808 | sprintf(vid_buf, " VLAN %u", vid); | |
1809 | } | |
1810 | ||
1811 | if (tb[NDA_DST]) { | |
1812 | /* TODO: Only IPv4 supported now. */ | |
1813 | dst_present = 1; | |
1814 | vtep_ip.family = AF_INET; | |
1815 | vtep_ip.prefixlen = IPV4_MAX_BITLEN; | |
1816 | memcpy(&(vtep_ip.u.prefix4.s_addr), RTA_DATA(tb[NDA_DST]), | |
1817 | IPV4_MAX_BYTELEN); | |
1818 | sprintf(dst_buf, " dst %s", inet_ntoa(vtep_ip.u.prefix4)); | |
1819 | } | |
1820 | ||
1821 | sticky = (ndm->ndm_state & NUD_NOARP) ? 1 : 0; | |
1822 | ||
1823 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1824 | zlog_debug("Rx %s family %s IF %s(%u)%s %sMAC %s%s", | |
1825 | nl_msg_type_to_str(h->nlmsg_type), | |
1826 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1827 | ndm->ndm_ifindex, vid_present ? vid_buf : "", | |
1828 | sticky ? "sticky " : "", | |
1829 | prefix_mac2str(&mac, buf, sizeof(buf)), | |
1830 | dst_present ? dst_buf : ""); | |
1831 | ||
1832 | if (filter_vlan && vid != filter_vlan) | |
1833 | return 0; | |
1834 | ||
1835 | /* If add or update, do accordingly if learnt on a "local" interface; if | |
1836 | * the notification is over VxLAN, this has to be related to | |
1837 | * multi-homing, | |
1838 | * so perform an implicit delete of any local entry (if it exists). | |
1839 | */ | |
1840 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
1841 | /* Drop "permanent" entries. */ | |
1842 | if (ndm->ndm_state & NUD_PERMANENT) | |
1843 | return 0; | |
1844 | ||
1845 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
1846 | return zebra_vxlan_check_del_local_mac(ifp, br_if, &mac, | |
1847 | vid); | |
1848 | ||
1849 | return zebra_vxlan_local_mac_add_update(ifp, br_if, &mac, vid, | |
1850 | sticky); | |
1851 | } | |
1852 | ||
1853 | /* This is a delete notification. | |
1854 | * 1. For a MAC over VxLan, check if it needs to be refreshed(readded) | |
1855 | * 2. For a MAC over "local" interface, delete the mac | |
1856 | * Note: We will get notifications from both bridge driver and VxLAN | |
1857 | * driver. | |
1858 | * Ignore the notification from VxLan driver as it is also generated | |
1859 | * when mac moves from remote to local. | |
1860 | */ | |
1861 | if (dst_present) | |
1862 | return 0; | |
1863 | ||
1864 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
1865 | return zebra_vxlan_check_readd_remote_mac(ifp, br_if, &mac, | |
1866 | vid); | |
1867 | ||
1868 | return zebra_vxlan_local_mac_del(ifp, br_if, &mac, vid); | |
2232a77c | 1869 | } |
1870 | ||
d62a17ae | 1871 | static int netlink_macfdb_table(struct sockaddr_nl *snl, struct nlmsghdr *h, |
1872 | ns_id_t ns_id, int startup) | |
2232a77c | 1873 | { |
d62a17ae | 1874 | int len; |
1875 | struct ndmsg *ndm; | |
2232a77c | 1876 | |
d62a17ae | 1877 | if (h->nlmsg_type != RTM_NEWNEIGH) |
1878 | return 0; | |
2232a77c | 1879 | |
d62a17ae | 1880 | /* Length validity. */ |
1881 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1882 | if (len < 0) | |
1883 | return -1; | |
2232a77c | 1884 | |
d62a17ae | 1885 | /* We are interested only in AF_BRIDGE notifications. */ |
1886 | ndm = NLMSG_DATA(h); | |
1887 | if (ndm->ndm_family != AF_BRIDGE) | |
1888 | return 0; | |
2232a77c | 1889 | |
d62a17ae | 1890 | return netlink_macfdb_change(snl, h, len); |
2232a77c | 1891 | } |
1892 | ||
1893 | /* Request for MAC FDB information from the kernel */ | |
d62a17ae | 1894 | static int netlink_request_macs(struct zebra_ns *zns, int family, int type, |
1895 | ifindex_t master_ifindex) | |
2232a77c | 1896 | { |
d62a17ae | 1897 | struct { |
1898 | struct nlmsghdr n; | |
1899 | struct ifinfomsg ifm; | |
1900 | char buf[256]; | |
1901 | } req; | |
1902 | ||
1903 | /* Form the request, specifying filter (rtattr) if needed. */ | |
1904 | memset(&req, 0, sizeof(req)); | |
1905 | req.n.nlmsg_type = type; | |
1906 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); | |
1907 | req.ifm.ifi_family = family; | |
1908 | if (master_ifindex) | |
1909 | addattr32(&req.n, sizeof(req), IFLA_MASTER, master_ifindex); | |
1910 | ||
1911 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2232a77c | 1912 | } |
1913 | ||
1914 | /* | |
1915 | * MAC forwarding database read using netlink interface. This is invoked | |
1916 | * at startup. | |
1917 | */ | |
d62a17ae | 1918 | int netlink_macfdb_read(struct zebra_ns *zns) |
2232a77c | 1919 | { |
d62a17ae | 1920 | int ret; |
1921 | ||
1922 | /* Get bridge FDB table. */ | |
1923 | ret = netlink_request_macs(zns, AF_BRIDGE, RTM_GETNEIGH, 0); | |
1924 | if (ret < 0) | |
1925 | return ret; | |
1926 | /* We are reading entire table. */ | |
1927 | filter_vlan = 0; | |
1928 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, zns, | |
1929 | 0, 1); | |
1930 | ||
1931 | return ret; | |
2232a77c | 1932 | } |
1933 | ||
1934 | /* | |
1935 | * MAC forwarding database read using netlink interface. This is for a | |
1936 | * specific bridge and matching specific access VLAN (if VLAN-aware bridge). | |
1937 | */ | |
d62a17ae | 1938 | int netlink_macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp, |
1939 | struct interface *br_if) | |
2232a77c | 1940 | { |
d62a17ae | 1941 | struct zebra_if *br_zif; |
1942 | struct zebra_if *zif; | |
1943 | struct zebra_l2info_vxlan *vxl; | |
1944 | int ret = 0; | |
1945 | ||
1946 | ||
1947 | /* Save VLAN we're filtering on, if needed. */ | |
1948 | br_zif = (struct zebra_if *)br_if->info; | |
1949 | zif = (struct zebra_if *)ifp->info; | |
1950 | vxl = &zif->l2info.vxl; | |
1951 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif)) | |
1952 | filter_vlan = vxl->access_vlan; | |
1953 | ||
1954 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
1955 | */ | |
1956 | ret = netlink_request_macs(zns, AF_BRIDGE, RTM_GETNEIGH, | |
1957 | br_if->ifindex); | |
1958 | if (ret < 0) | |
1959 | return ret; | |
1960 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, zns, | |
1961 | 0, 0); | |
1962 | ||
1963 | /* Reset VLAN filter. */ | |
1964 | filter_vlan = 0; | |
1965 | return ret; | |
2232a77c | 1966 | } |
1967 | ||
d62a17ae | 1968 | static int netlink_macfdb_update(struct interface *ifp, vlanid_t vid, |
1969 | struct ethaddr *mac, struct in_addr vtep_ip, | |
1970 | int local, int cmd, u_char sticky) | |
2232a77c | 1971 | { |
d62a17ae | 1972 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); |
1973 | struct { | |
1974 | struct nlmsghdr n; | |
1975 | struct ndmsg ndm; | |
1976 | char buf[256]; | |
1977 | } req; | |
1978 | int dst_alen; | |
1979 | struct zebra_if *zif; | |
1980 | struct interface *br_if; | |
1981 | struct zebra_if *br_zif; | |
1982 | char buf[ETHER_ADDR_STRLEN]; | |
1983 | int vid_present = 0, dst_present = 0; | |
1984 | char vid_buf[20]; | |
1985 | char dst_buf[30]; | |
1986 | ||
1987 | zif = ifp->info; | |
1988 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
1989 | zlog_warn("MAC %s on IF %s(%u) - no mapping to bridge", | |
1990 | (cmd == RTM_NEWNEIGH) ? "add" : "del", ifp->name, | |
1991 | ifp->ifindex); | |
1992 | return -1; | |
1993 | } | |
1994 | ||
1995 | memset(&req.n, 0, sizeof(req.n)); | |
1996 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1997 | ||
1998 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1999 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2000 | if (cmd == RTM_NEWNEIGH) | |
2001 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
2002 | req.n.nlmsg_type = cmd; | |
2003 | req.ndm.ndm_family = AF_BRIDGE; | |
2004 | req.ndm.ndm_flags |= NTF_SELF | NTF_MASTER; | |
2005 | req.ndm.ndm_state = NUD_REACHABLE; | |
2006 | ||
2007 | if (sticky) | |
2008 | req.ndm.ndm_state |= NUD_NOARP; | |
2009 | else | |
2010 | req.ndm.ndm_flags |= NTF_EXT_LEARNED; | |
2011 | ||
2012 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
2013 | req.ndm.ndm_ifindex = ifp->ifindex; | |
2014 | if (!local) { | |
2015 | dst_alen = 4; // TODO: hardcoded | |
2016 | addattr_l(&req.n, sizeof(req), NDA_DST, &vtep_ip, dst_alen); | |
2017 | dst_present = 1; | |
2018 | sprintf(dst_buf, " dst %s", inet_ntoa(vtep_ip)); | |
2019 | } | |
2020 | br_zif = (struct zebra_if *)br_if->info; | |
2021 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif) && vid > 0) { | |
2022 | addattr16(&req.n, sizeof(req), NDA_VLAN, vid); | |
2023 | vid_present = 1; | |
2024 | sprintf(vid_buf, " VLAN %u", vid); | |
2025 | } | |
2026 | addattr32(&req.n, sizeof(req), NDA_MASTER, br_if->ifindex); | |
2027 | ||
2028 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2029 | zlog_debug("Tx %s family %s IF %s(%u)%s %sMAC %s%s", | |
2030 | nl_msg_type_to_str(cmd), | |
2031 | nl_family_to_str(req.ndm.ndm_family), ifp->name, | |
2032 | ifp->ifindex, vid_present ? vid_buf : "", | |
2033 | sticky ? "sticky " : "", | |
2034 | prefix_mac2str(mac, buf, sizeof(buf)), | |
2035 | dst_present ? dst_buf : ""); | |
2036 | ||
2037 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
2038 | 0); | |
2232a77c | 2039 | } |
2040 | ||
d62a17ae | 2041 | #define NUD_VALID \ |
2042 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE | NUD_PROBE | NUD_STALE \ | |
2043 | | NUD_DELAY) | |
2232a77c | 2044 | |
d62a17ae | 2045 | static int netlink_ipneigh_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
2046 | int len) | |
2232a77c | 2047 | { |
d62a17ae | 2048 | struct ndmsg *ndm; |
2049 | struct interface *ifp; | |
2050 | struct zebra_if *zif; | |
d62a17ae | 2051 | struct rtattr *tb[NDA_MAX + 1]; |
2052 | struct interface *link_if; | |
2053 | struct ethaddr mac; | |
2054 | struct ipaddr ip; | |
2055 | char buf[ETHER_ADDR_STRLEN]; | |
2056 | char buf2[INET6_ADDRSTRLEN]; | |
2057 | int mac_present = 0; | |
2058 | u_char ext_learned; | |
2059 | ||
2060 | ndm = NLMSG_DATA(h); | |
2061 | ||
2853fed6 | 2062 | /* We only process neigh notifications if EVPN is enabled */ |
2063 | if (!is_evpn_enabled()) | |
2064 | return 0; | |
2065 | ||
d62a17ae | 2066 | /* The interface should exist. */ |
2067 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT), | |
2068 | ndm->ndm_ifindex); | |
2853fed6 | 2069 | if (!ifp || !ifp->info) |
d62a17ae | 2070 | return 0; |
2071 | ||
2072 | /* Drop "permanent" entries. */ | |
2073 | if (ndm->ndm_state & NUD_PERMANENT) | |
2074 | return 0; | |
2075 | ||
2076 | zif = (struct zebra_if *)ifp->info; | |
2077 | /* The neighbor is present on an SVI. From this, we locate the | |
2078 | * underlying | |
2079 | * bridge because we're only interested in neighbors on a VxLAN bridge. | |
2080 | * The bridge is located based on the nature of the SVI: | |
2081 | * (a) In the case of a VLAN-aware bridge, the SVI is a L3 VLAN | |
2082 | * interface | |
2083 | * and is linked to the bridge | |
2084 | * (b) In the case of a VLAN-unaware bridge, the SVI is the bridge | |
2085 | * inteface | |
2086 | * itself | |
2087 | */ | |
2088 | if (IS_ZEBRA_IF_VLAN(ifp)) { | |
71349e03 MK |
2089 | link_if = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT), |
2090 | zif->link_ifindex); | |
d62a17ae | 2091 | if (!link_if) |
2092 | return 0; | |
2093 | } else if (IS_ZEBRA_IF_BRIDGE(ifp)) | |
2094 | link_if = ifp; | |
2095 | else | |
2096 | return 0; | |
2097 | ||
2098 | /* Parse attributes and extract fields of interest. */ | |
2099 | memset(tb, 0, sizeof tb); | |
2100 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
2101 | ||
2102 | if (!tb[NDA_DST]) { | |
2103 | zlog_warn("%s family %s IF %s(%u) - no DST", | |
2104 | nl_msg_type_to_str(h->nlmsg_type), | |
2105 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2106 | ndm->ndm_ifindex); | |
2107 | return 0; | |
2108 | } | |
2109 | memset(&mac, 0, sizeof(struct ethaddr)); | |
2110 | memset(&ip, 0, sizeof(struct ipaddr)); | |
2111 | ip.ipa_type = (ndm->ndm_family == AF_INET) ? IPADDR_V4 : IPADDR_V6; | |
2112 | memcpy(&ip.ip.addr, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST])); | |
2113 | ||
2114 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
2115 | if (tb[NDA_LLADDR]) { | |
ff8b7eb8 | 2116 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
d62a17ae | 2117 | zlog_warn( |
df0b13cf | 2118 | "%s family %s IF %s(%u) - LLADDR is not MAC, len %lu", |
d62a17ae | 2119 | nl_msg_type_to_str(h->nlmsg_type), |
2120 | nl_family_to_str(ndm->ndm_family), | |
2121 | ifp->name, ndm->ndm_ifindex, | |
df0b13cf | 2122 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); |
d62a17ae | 2123 | return 0; |
2124 | } | |
2125 | ||
2126 | mac_present = 1; | |
ff8b7eb8 | 2127 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 2128 | } |
2129 | ||
2130 | ext_learned = (ndm->ndm_flags & NTF_EXT_LEARNED) ? 1 : 0; | |
2131 | ||
2132 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2133 | zlog_debug( | |
2134 | "Rx %s family %s IF %s(%u) IP %s MAC %s state 0x%x flags 0x%x", | |
2135 | nl_msg_type_to_str(h->nlmsg_type), | |
2136 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2137 | ndm->ndm_ifindex, | |
2138 | ipaddr2str(&ip, buf2, sizeof(buf2)), | |
2139 | mac_present | |
2140 | ? prefix_mac2str(&mac, buf, sizeof(buf)) | |
2141 | : "", | |
2142 | ndm->ndm_state, ndm->ndm_flags); | |
2143 | ||
2144 | /* If the neighbor state is valid for use, process as an add or | |
2145 | * update | |
2146 | * else process as a delete. Note that the delete handling may | |
2147 | * result | |
2148 | * in re-adding the neighbor if it is a valid "remote" neighbor. | |
2149 | */ | |
2150 | if (ndm->ndm_state & NUD_VALID) | |
2151 | return zebra_vxlan_local_neigh_add_update( | |
2152 | ifp, link_if, &ip, &mac, ndm->ndm_state, | |
2153 | ext_learned); | |
2154 | ||
2155 | return zebra_vxlan_local_neigh_del(ifp, link_if, &ip); | |
2156 | } | |
2157 | ||
2158 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2159 | zlog_debug("Rx %s family %s IF %s(%u) IP %s", | |
2160 | nl_msg_type_to_str(h->nlmsg_type), | |
2161 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2162 | ndm->ndm_ifindex, | |
2163 | ipaddr2str(&ip, buf2, sizeof(buf2))); | |
2164 | ||
2165 | /* Process the delete - it may result in re-adding the neighbor if it is | |
2166 | * a valid "remote" neighbor. | |
2167 | */ | |
2168 | return zebra_vxlan_local_neigh_del(ifp, link_if, &ip); | |
2232a77c | 2169 | } |
2170 | ||
d62a17ae | 2171 | static int netlink_neigh_table(struct sockaddr_nl *snl, struct nlmsghdr *h, |
2172 | ns_id_t ns_id, int startup) | |
2232a77c | 2173 | { |
d62a17ae | 2174 | int len; |
2175 | struct ndmsg *ndm; | |
2232a77c | 2176 | |
d62a17ae | 2177 | if (h->nlmsg_type != RTM_NEWNEIGH) |
2178 | return 0; | |
2232a77c | 2179 | |
d62a17ae | 2180 | /* Length validity. */ |
2181 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2182 | if (len < 0) | |
2183 | return -1; | |
2232a77c | 2184 | |
d62a17ae | 2185 | /* We are interested only in AF_INET or AF_INET6 notifications. */ |
2186 | ndm = NLMSG_DATA(h); | |
2187 | if (ndm->ndm_family != AF_INET && ndm->ndm_family != AF_INET6) | |
2188 | return 0; | |
2232a77c | 2189 | |
d62a17ae | 2190 | return netlink_neigh_change(snl, h, len); |
2232a77c | 2191 | } |
2192 | ||
2193 | /* Request for IP neighbor information from the kernel */ | |
d62a17ae | 2194 | static int netlink_request_neigh(struct zebra_ns *zns, int family, int type, |
2195 | ifindex_t ifindex) | |
2232a77c | 2196 | { |
d62a17ae | 2197 | struct { |
2198 | struct nlmsghdr n; | |
2199 | struct ndmsg ndm; | |
2200 | char buf[256]; | |
2201 | } req; | |
2202 | ||
2203 | /* Form the request, specifying filter (rtattr) if needed. */ | |
2204 | memset(&req, 0, sizeof(req)); | |
2205 | req.n.nlmsg_type = type; | |
2206 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2207 | req.ndm.ndm_family = family; | |
2208 | if (ifindex) | |
2209 | addattr32(&req.n, sizeof(req), NDA_IFINDEX, ifindex); | |
2210 | ||
2211 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2232a77c | 2212 | } |
2213 | ||
2214 | /* | |
2215 | * IP Neighbor table read using netlink interface. This is invoked | |
2216 | * at startup. | |
2217 | */ | |
d62a17ae | 2218 | int netlink_neigh_read(struct zebra_ns *zns) |
2232a77c | 2219 | { |
d62a17ae | 2220 | int ret; |
2232a77c | 2221 | |
d62a17ae | 2222 | /* Get IP neighbor table. */ |
2223 | ret = netlink_request_neigh(zns, AF_UNSPEC, RTM_GETNEIGH, 0); | |
2224 | if (ret < 0) | |
2225 | return ret; | |
2226 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, zns, 0, | |
2227 | 1); | |
2232a77c | 2228 | |
d62a17ae | 2229 | return ret; |
2232a77c | 2230 | } |
2231 | ||
2232 | /* | |
2233 | * IP Neighbor table read using netlink interface. This is for a specific | |
2234 | * VLAN device. | |
2235 | */ | |
d62a17ae | 2236 | int netlink_neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if) |
2232a77c | 2237 | { |
d62a17ae | 2238 | int ret = 0; |
2232a77c | 2239 | |
d62a17ae | 2240 | ret = netlink_request_neigh(zns, AF_UNSPEC, RTM_GETNEIGH, |
2241 | vlan_if->ifindex); | |
2242 | if (ret < 0) | |
2243 | return ret; | |
2244 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, zns, 0, | |
2245 | 0); | |
2232a77c | 2246 | |
d62a17ae | 2247 | return ret; |
2232a77c | 2248 | } |
2249 | ||
d62a17ae | 2250 | int netlink_neigh_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
2251 | ns_id_t ns_id) | |
2232a77c | 2252 | { |
d62a17ae | 2253 | int len; |
2254 | struct ndmsg *ndm; | |
2232a77c | 2255 | |
d62a17ae | 2256 | if (!(h->nlmsg_type == RTM_NEWNEIGH || h->nlmsg_type == RTM_DELNEIGH)) |
2257 | return 0; | |
2232a77c | 2258 | |
d62a17ae | 2259 | /* Length validity. */ |
2260 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2261 | if (len < 0) | |
2262 | return -1; | |
2232a77c | 2263 | |
d62a17ae | 2264 | /* Is this a notification for the MAC FDB or IP neighbor table? */ |
2265 | ndm = NLMSG_DATA(h); | |
2266 | if (ndm->ndm_family == AF_BRIDGE) | |
2267 | return netlink_macfdb_change(snl, h, len); | |
2232a77c | 2268 | |
d62a17ae | 2269 | if (ndm->ndm_type != RTN_UNICAST) |
2270 | return 0; | |
2232a77c | 2271 | |
d62a17ae | 2272 | if (ndm->ndm_family == AF_INET || ndm->ndm_family == AF_INET6) |
2273 | return netlink_ipneigh_change(snl, h, len); | |
2232a77c | 2274 | |
d62a17ae | 2275 | return 0; |
2232a77c | 2276 | } |
2277 | ||
d62a17ae | 2278 | static int netlink_neigh_update2(struct interface *ifp, struct ipaddr *ip, |
2279 | struct ethaddr *mac, u_int32_t flags, int cmd) | |
2232a77c | 2280 | { |
d62a17ae | 2281 | struct { |
2282 | struct nlmsghdr n; | |
2283 | struct ndmsg ndm; | |
2284 | char buf[256]; | |
2285 | } req; | |
2286 | int ipa_len; | |
2287 | ||
2288 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
2289 | char buf[INET6_ADDRSTRLEN]; | |
2290 | char buf2[ETHER_ADDR_STRLEN]; | |
2291 | ||
2292 | memset(&req.n, 0, sizeof(req.n)); | |
2293 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
2294 | ||
2295 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2296 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2297 | if (cmd == RTM_NEWNEIGH) | |
2298 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
2299 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
2300 | req.ndm.ndm_family = IS_IPADDR_V4(ip) ? AF_INET : AF_INET6; | |
2301 | req.ndm.ndm_state = flags; | |
2302 | req.ndm.ndm_ifindex = ifp->ifindex; | |
2303 | req.ndm.ndm_type = RTN_UNICAST; | |
2304 | req.ndm.ndm_flags = NTF_EXT_LEARNED; | |
2305 | ||
2306 | ||
2307 | ipa_len = IS_IPADDR_V4(ip) ? IPV4_MAX_BYTELEN : IPV6_MAX_BYTELEN; | |
2308 | addattr_l(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); | |
2309 | if (mac) | |
2310 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
2311 | ||
2312 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2313 | zlog_debug("Tx %s family %s IF %s(%u) Neigh %s MAC %s", | |
2314 | nl_msg_type_to_str(cmd), | |
2315 | nl_family_to_str(req.ndm.ndm_family), ifp->name, | |
2316 | ifp->ifindex, ipaddr2str(ip, buf, sizeof(buf)), | |
2317 | mac ? prefix_mac2str(mac, buf2, sizeof(buf2)) | |
2318 | : "null"); | |
2319 | ||
2320 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
2321 | 0); | |
2232a77c | 2322 | } |
2323 | ||
d62a17ae | 2324 | int kernel_add_mac(struct interface *ifp, vlanid_t vid, struct ethaddr *mac, |
2325 | struct in_addr vtep_ip, u_char sticky) | |
2232a77c | 2326 | { |
d62a17ae | 2327 | return netlink_macfdb_update(ifp, vid, mac, vtep_ip, 0, RTM_NEWNEIGH, |
2328 | sticky); | |
2232a77c | 2329 | } |
2330 | ||
d62a17ae | 2331 | int kernel_del_mac(struct interface *ifp, vlanid_t vid, struct ethaddr *mac, |
2332 | struct in_addr vtep_ip, int local) | |
2232a77c | 2333 | { |
d62a17ae | 2334 | return netlink_macfdb_update(ifp, vid, mac, vtep_ip, local, |
2335 | RTM_DELNEIGH, 0); | |
2232a77c | 2336 | } |
2337 | ||
d62a17ae | 2338 | int kernel_add_neigh(struct interface *ifp, struct ipaddr *ip, |
2339 | struct ethaddr *mac) | |
2232a77c | 2340 | { |
d62a17ae | 2341 | return netlink_neigh_update2(ifp, ip, mac, NUD_REACHABLE, RTM_NEWNEIGH); |
2232a77c | 2342 | } |
2343 | ||
d62a17ae | 2344 | int kernel_del_neigh(struct interface *ifp, struct ipaddr *ip) |
2232a77c | 2345 | { |
d62a17ae | 2346 | return netlink_neigh_update2(ifp, ip, NULL, 0, RTM_DELNEIGH); |
2232a77c | 2347 | } |
2348 | ||
40c7bdb0 | 2349 | /* |
2350 | * MPLS label forwarding table change via netlink interface. | |
2351 | */ | |
d62a17ae | 2352 | int netlink_mpls_multipath(int cmd, zebra_lsp_t *lsp) |
40c7bdb0 | 2353 | { |
d62a17ae | 2354 | mpls_lse_t lse; |
2355 | zebra_nhlfe_t *nhlfe; | |
2356 | struct nexthop *nexthop = NULL; | |
2357 | unsigned int nexthop_num; | |
2358 | const char *routedesc; | |
2359 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
805444ce | 2360 | int route_type; |
d62a17ae | 2361 | |
2362 | struct { | |
2363 | struct nlmsghdr n; | |
2364 | struct rtmsg r; | |
2365 | char buf[NL_PKT_BUF_SIZE]; | |
2366 | } req; | |
2367 | ||
2368 | memset(&req, 0, sizeof req - NL_PKT_BUF_SIZE); | |
2369 | ||
d62a17ae | 2370 | /* |
2371 | * Count # nexthops so we can decide whether to use singlepath | |
2372 | * or multipath case. | |
2373 | */ | |
2374 | nexthop_num = 0; | |
2375 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2376 | nexthop = nhlfe->nexthop; | |
2377 | if (!nexthop) | |
2378 | continue; | |
2379 | if (cmd == RTM_NEWROUTE) { | |
2380 | /* Count all selected NHLFEs */ | |
2381 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2382 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
2383 | nexthop_num++; | |
2384 | } else /* DEL */ | |
2385 | { | |
2386 | /* Count all installed NHLFEs */ | |
2387 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) | |
2388 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
2389 | nexthop_num++; | |
2390 | } | |
2391 | } | |
2392 | ||
8dc8a4b6 | 2393 | if ((nexthop_num == 0) || (!lsp->best_nhlfe && (cmd != RTM_DELROUTE))) |
d62a17ae | 2394 | return 0; |
2395 | ||
2396 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
2397 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
2398 | req.n.nlmsg_type = cmd; | |
2399 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
2400 | ||
2401 | req.r.rtm_family = AF_MPLS; | |
2402 | req.r.rtm_table = RT_TABLE_MAIN; | |
2403 | req.r.rtm_dst_len = MPLS_LABEL_LEN_BITS; | |
d62a17ae | 2404 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
2405 | req.r.rtm_type = RTN_UNICAST; | |
2406 | ||
8dc8a4b6 | 2407 | if (cmd == RTM_NEWROUTE) { |
d62a17ae | 2408 | /* We do a replace to handle update. */ |
2409 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
2410 | ||
8dc8a4b6 DS |
2411 | /* set the protocol value if installing */ |
2412 | route_type = re_type_from_lsp_type(lsp->best_nhlfe->type); | |
2413 | req.r.rtm_protocol = zebra2proto(route_type); | |
2414 | } | |
2415 | ||
d62a17ae | 2416 | /* Fill destination */ |
2417 | lse = mpls_lse_encode(lsp->ile.in_label, 0, 0, 1); | |
2418 | addattr_l(&req.n, sizeof req, RTA_DST, &lse, sizeof(mpls_lse_t)); | |
2419 | ||
2420 | /* Fill nexthops (paths) based on single-path or multipath. The paths | |
2421 | * chosen depend on the operation. | |
2422 | */ | |
2423 | if (nexthop_num == 1 || multipath_num == 1) { | |
8b1450b9 | 2424 | routedesc = "single-path"; |
d62a17ae | 2425 | _netlink_mpls_debug(cmd, lsp->ile.in_label, routedesc); |
2426 | ||
2427 | nexthop_num = 0; | |
2428 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2429 | nexthop = nhlfe->nexthop; | |
2430 | if (!nexthop) | |
2431 | continue; | |
2432 | ||
2433 | if ((cmd == RTM_NEWROUTE | |
2434 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2435 | && CHECK_FLAG(nexthop->flags, | |
2436 | NEXTHOP_FLAG_ACTIVE))) | |
2437 | || (cmd == RTM_DELROUTE | |
2438 | && (CHECK_FLAG(nhlfe->flags, | |
2439 | NHLFE_FLAG_INSTALLED) | |
2440 | && CHECK_FLAG(nexthop->flags, | |
2441 | NEXTHOP_FLAG_FIB)))) { | |
2442 | /* Add the gateway */ | |
2443 | _netlink_mpls_build_singlepath(routedesc, nhlfe, | |
2444 | &req.n, &req.r, | |
2445 | sizeof req, cmd); | |
d62a17ae | 2446 | nexthop_num++; |
2447 | break; | |
2448 | } | |
2449 | } | |
2450 | } else /* Multipath case */ | |
2451 | { | |
2452 | char buf[NL_PKT_BUF_SIZE]; | |
2453 | struct rtattr *rta = (void *)buf; | |
2454 | struct rtnexthop *rtnh; | |
2455 | union g_addr *src1 = NULL; | |
2456 | ||
2457 | rta->rta_type = RTA_MULTIPATH; | |
2458 | rta->rta_len = RTA_LENGTH(0); | |
2459 | rtnh = RTA_DATA(rta); | |
2460 | ||
8b1450b9 | 2461 | routedesc = "multipath"; |
d62a17ae | 2462 | _netlink_mpls_debug(cmd, lsp->ile.in_label, routedesc); |
2463 | ||
2464 | nexthop_num = 0; | |
2465 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2466 | nexthop = nhlfe->nexthop; | |
2467 | if (!nexthop) | |
2468 | continue; | |
2469 | ||
2470 | if (nexthop_num >= multipath_num) | |
2471 | break; | |
2472 | ||
2473 | if ((cmd == RTM_NEWROUTE | |
2474 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2475 | && CHECK_FLAG(nexthop->flags, | |
2476 | NEXTHOP_FLAG_ACTIVE))) | |
2477 | || (cmd == RTM_DELROUTE | |
2478 | && (CHECK_FLAG(nhlfe->flags, | |
2479 | NHLFE_FLAG_INSTALLED) | |
2480 | && CHECK_FLAG(nexthop->flags, | |
2481 | NEXTHOP_FLAG_FIB)))) { | |
2482 | nexthop_num++; | |
2483 | ||
2484 | /* Build the multipath */ | |
2485 | _netlink_mpls_build_multipath(routedesc, nhlfe, | |
2486 | rta, rtnh, &req.r, | |
2487 | &src1); | |
2488 | rtnh = RTNH_NEXT(rtnh); | |
d62a17ae | 2489 | } |
2490 | } | |
2491 | ||
2492 | /* Add the multipath */ | |
2493 | if (rta->rta_len > RTA_LENGTH(0)) | |
2494 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
2495 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
2496 | } | |
2497 | ||
2498 | /* Talk to netlink socket. */ | |
2499 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
2500 | 0); | |
40c7bdb0 | 2501 | } |
ddfeb486 | 2502 | #endif /* HAVE_NETLINK */ |