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Commit | Line | Data |
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718e3744 | 1 | /* |
2 | * Kernel routing table updates by routing socket. | |
3 | * Copyright (C) 1997, 98 Kunihiro Ishiguro | |
4 | * | |
5 | * This file is part of GNU Zebra. | |
6 | * | |
7 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * GNU Zebra is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
896014f4 DL |
17 | * You should have received a copy of the GNU General Public License along |
18 | * with this program; see the file COPYING; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 20 | */ |
21 | ||
22 | #include <zebra.h> | |
ddfeb486 DL |
23 | |
24 | #ifndef HAVE_NETLINK | |
25 | ||
fe6c7157 | 26 | #ifdef __OpenBSD__ |
d3e2c74a RW |
27 | #include <netmpls/mpls.h> |
28 | #endif | |
718e3744 | 29 | |
30 | #include "if.h" | |
31 | #include "prefix.h" | |
32 | #include "sockunion.h" | |
33 | #include "log.h" | |
edd7c245 | 34 | #include "privs.h" |
13d60d35 | 35 | #include "vxlan.h" |
174482ef | 36 | #include "lib_errors.h" |
718e3744 | 37 | |
38 | #include "zebra/debug.h" | |
39 | #include "zebra/rib.h" | |
6621ca86 | 40 | #include "zebra/rt.h" |
dc95824a | 41 | #include "zebra/kernel_socket.h" |
d3e2c74a | 42 | #include "zebra/zebra_mpls.h" |
364fed6b | 43 | #include "zebra/zebra_errors.h" |
718e3744 | 44 | |
edd7c245 | 45 | extern struct zebra_privs_t zserv_privs; |
46 | ||
5e8c8947 | 47 | #ifdef __OpenBSD__ |
8ecdb26e | 48 | static int kernel_rtm_add_labels(struct mpls_label_stack *nh_label, |
5e8c8947 RW |
49 | struct sockaddr_mpls *smpls) |
50 | { | |
51 | if (nh_label->num_labels > 1) { | |
e914ccbe | 52 | flog_warn(EC_ZEBRA_MAX_LABELS_PUSH, |
3efd0893 | 53 | "%s: can't push %u labels at once (maximum is 1)", |
9df414fe | 54 | __func__, nh_label->num_labels); |
5e8c8947 RW |
55 | return -1; |
56 | } | |
57 | ||
58 | memset(smpls, 0, sizeof(*smpls)); | |
59 | smpls->smpls_len = sizeof(*smpls); | |
60 | smpls->smpls_family = AF_MPLS; | |
61 | smpls->smpls_label = htonl(nh_label->label[0] << MPLS_LABEL_OFFSET); | |
62 | ||
63 | return 0; | |
64 | } | |
65 | #endif | |
66 | ||
718e3744 | 67 | /* Interface between zebra message and rtm message. */ |
08ea27d1 DS |
68 | static int kernel_rtm(int cmd, const struct prefix *p, |
69 | const struct nexthop_group *ng, uint32_t metric) | |
718e3744 | 70 | |
71 | { | |
ca2c70bd | 72 | union sockunion sin_dest, sin_mask, sin_gate; |
fe6c7157 | 73 | #ifdef __OpenBSD__ |
d62a17ae | 74 | struct sockaddr_mpls smpls; |
d3e2c74a | 75 | #endif |
d62a17ae | 76 | union sockunion *smplsp = NULL; |
77 | struct nexthop *nexthop; | |
78 | int nexthop_num = 0; | |
79 | ifindex_t ifindex = 0; | |
4dd39a0e | 80 | bool gate = false; |
d62a17ae | 81 | int error; |
981dc13f | 82 | char gate_buf[INET6_BUFSIZ]; |
a8309422 | 83 | enum blackhole_type bh_type = BLACKHOLE_UNSPEC; |
d62a17ae | 84 | |
86afd529 DS |
85 | /* |
86 | * We only have the ability to ADD or DELETE at this point | |
87 | * in time. | |
88 | */ | |
89 | if (cmd != RTM_ADD && cmd != RTM_DELETE) { | |
90 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2dbe669b | 91 | zlog_debug("%s: %pFX odd command %s", __func__, p, |
5ea8213f | 92 | lookup_msg(rtm_type_str, cmd, NULL)); |
86afd529 DS |
93 | return 0; |
94 | } | |
95 | ||
08ea27d1 DS |
96 | memset(&sin_dest, 0, sizeof(sin_dest)); |
97 | memset(&sin_gate, 0, sizeof(sin_gate)); | |
ca2c70bd | 98 | memset(&sin_mask, 0, sizeof(sin_mask)); |
718e3744 | 99 | |
08ea27d1 DS |
100 | switch (p->family) { |
101 | case AF_INET: | |
102 | sin_dest.sin.sin_family = AF_INET; | |
08ea27d1 DS |
103 | sin_dest.sin.sin_addr = p->u.prefix4; |
104 | sin_gate.sin.sin_family = AF_INET; | |
0413dd75 RZ |
105 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
106 | sin_dest.sin.sin_len = sizeof(struct sockaddr_in); | |
107 | sin_gate.sin.sin_len = sizeof(struct sockaddr_in); | |
108 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
08ea27d1 DS |
109 | break; |
110 | case AF_INET6: | |
111 | sin_dest.sin6.sin6_family = AF_INET6; | |
08ea27d1 DS |
112 | sin_dest.sin6.sin6_addr = p->u.prefix6; |
113 | sin_gate.sin6.sin6_family = AF_INET6; | |
0413dd75 RZ |
114 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
115 | sin_dest.sin6.sin6_len = sizeof(struct sockaddr_in6); | |
116 | sin_gate.sin6.sin6_len = sizeof(struct sockaddr_in6); | |
117 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
08ea27d1 DS |
118 | break; |
119 | } | |
718e3744 | 120 | |
d62a17ae | 121 | /* Make gateway. */ |
01ce7cba | 122 | for (ALL_NEXTHOPS_PTR(ng, nexthop)) { |
86afd529 DS |
123 | /* |
124 | * We only want to use the actual good nexthops | |
125 | */ | |
126 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE) || | |
127 | !CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
d62a17ae | 128 | continue; |
129 | ||
c2519893 | 130 | smplsp = NULL; |
4dd39a0e | 131 | gate = false; |
981dc13f | 132 | snprintf(gate_buf, sizeof(gate_buf), "NULL"); |
d62a17ae | 133 | |
86afd529 DS |
134 | switch (nexthop->type) { |
135 | case NEXTHOP_TYPE_IPV4: | |
136 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
137 | sin_gate.sin.sin_addr = nexthop->gate.ipv4; | |
138 | sin_gate.sin.sin_family = AF_INET; | |
0413dd75 RZ |
139 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
140 | sin_gate.sin.sin_len = sizeof(struct sockaddr_in); | |
141 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
86afd529 | 142 | ifindex = nexthop->ifindex; |
4dd39a0e | 143 | gate = true; |
86afd529 DS |
144 | break; |
145 | case NEXTHOP_TYPE_IPV6: | |
146 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
147 | sin_gate.sin6.sin6_addr = nexthop->gate.ipv6; | |
148 | sin_gate.sin6.sin6_family = AF_INET6; | |
0413dd75 RZ |
149 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
150 | sin_gate.sin6.sin6_len = sizeof(struct sockaddr_in6); | |
151 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
86afd529 | 152 | ifindex = nexthop->ifindex; |
08ea27d1 DS |
153 | /* Under kame set interface index to link local address */ |
154 | #ifdef KAME | |
155 | ||
156 | #define SET_IN6_LINKLOCAL_IFINDEX(a, i) \ | |
c9277ebb DS |
157 | do { \ |
158 | (a).s6_addr[2] = ((i) >> 8) & 0xff; \ | |
159 | (a).s6_addr[3] = (i)&0xff; \ | |
160 | } while (0) | |
08ea27d1 | 161 | |
86afd529 DS |
162 | if (IN6_IS_ADDR_LINKLOCAL(&sin_gate.sin6.sin6_addr)) |
163 | SET_IN6_LINKLOCAL_IFINDEX( | |
164 | sin_gate.sin6.sin6_addr, | |
165 | ifindex); | |
08ea27d1 DS |
166 | #endif /* KAME */ |
167 | ||
4dd39a0e | 168 | gate = true; |
86afd529 DS |
169 | break; |
170 | case NEXTHOP_TYPE_IFINDEX: | |
171 | ifindex = nexthop->ifindex; | |
172 | break; | |
173 | case NEXTHOP_TYPE_BLACKHOLE: | |
174 | bh_type = nexthop->bh_type; | |
175 | switch (p->family) { | |
c3d6b386 | 176 | case AF_INET: { |
86afd529 | 177 | struct in_addr loopback; |
381477e8 | 178 | |
86afd529 DS |
179 | loopback.s_addr = htonl(INADDR_LOOPBACK); |
180 | sin_gate.sin.sin_addr = loopback; | |
0413dd75 RZ |
181 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
182 | sin_gate.sin.sin_len = | |
183 | sizeof(struct sockaddr_in); | |
184 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
4dd39a0e | 185 | gate = true; |
381477e8 DS |
186 | } break; |
187 | case AF_INET6: { | |
188 | struct in6_addr loopback; | |
189 | ||
190 | inet_pton(AF_INET6, "::1", &loopback); | |
191 | ||
192 | sin_gate.sin6.sin6_addr = loopback; | |
193 | sin_gate.sin6.sin6_family = AF_INET6; | |
194 | ||
195 | #ifdef HAVE_STRUCTSOCKADDR_SA_LEN | |
196 | sin_gate.sin6.sin6_len = | |
197 | sizeof(struct sockaddr_in6); | |
198 | #endif /* HAVE_STRUCTSOCKADDR_SA_LEN */ | |
199 | gate = true; | |
200 | } break; | |
d62a17ae | 201 | } |
86afd529 DS |
202 | } |
203 | ||
204 | switch (p->family) { | |
205 | case AF_INET: | |
18d10d88 DS |
206 | masklen2ip(p->prefixlen, &sin_mask.sin.sin_addr); |
207 | sin_mask.sin.sin_family = AF_INET; | |
0413dd75 RZ |
208 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
209 | sin_mask.sin.sin_len = sizeof(struct sockaddr_in); | |
210 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
86afd529 DS |
211 | break; |
212 | case AF_INET6: | |
18d10d88 DS |
213 | masklen2ip6(p->prefixlen, &sin_mask.sin6.sin6_addr); |
214 | sin_mask.sin6.sin6_family = AF_INET6; | |
0413dd75 RZ |
215 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
216 | sin_mask.sin6.sin6_len = sizeof(struct sockaddr_in6); | |
217 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
86afd529 DS |
218 | break; |
219 | } | |
718e3744 | 220 | |
fe6c7157 | 221 | #ifdef __OpenBSD__ |
b24204be MS |
222 | if (nexthop->nh_label) { |
223 | if (kernel_rtm_add_labels(nexthop->nh_label, | |
224 | &smpls) != 0) | |
225 | continue; | |
226 | smplsp = (union sockunion *)&smpls; | |
227 | } | |
d3e2c74a | 228 | #endif |
18d10d88 | 229 | error = rtm_write(cmd, &sin_dest, &sin_mask, |
86afd529 DS |
230 | gate ? &sin_gate : NULL, smplsp, |
231 | ifindex, bh_type, metric); | |
232 | ||
233 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
234 | if (!gate) { | |
981dc13f | 235 | zlog_debug( |
2dbe669b DA |
236 | "%s: %pFX: attention! gate not found for re", |
237 | __func__, p); | |
981dc13f RZ |
238 | } else { |
239 | switch (p->family) { | |
c3d6b386 | 240 | case AF_INET: |
981dc13f RZ |
241 | inet_ntop(AF_INET, |
242 | &sin_gate.sin.sin_addr, | |
243 | gate_buf, sizeof(gate_buf)); | |
244 | break; | |
245 | ||
c3d6b386 | 246 | case AF_INET6: |
981dc13f RZ |
247 | inet_ntop(AF_INET6, |
248 | &sin_gate.sin6.sin6_addr, | |
249 | gate_buf, sizeof(gate_buf)); | |
250 | break; | |
251 | ||
252 | default: | |
253 | snprintf(gate_buf, sizeof(gate_buf), | |
254 | "(invalid-af)"); | |
255 | break; | |
256 | } | |
257 | } | |
86afd529 DS |
258 | } |
259 | switch (error) { | |
260 | /* We only flag nexthops as being in FIB if | |
261 | * rtm_write() did its work. */ | |
262 | case ZEBRA_ERR_NOERROR: | |
263 | nexthop_num++; | |
264 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2dbe669b DA |
265 | zlog_debug("%s: %pFX: successfully did NH %s", |
266 | __func__, p, gate_buf); | |
86afd529 DS |
267 | if (cmd == RTM_ADD) |
268 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
269 | break; | |
270 | ||
271 | /* The only valid case for this error is | |
272 | * kernel's failure to install a multipath | |
273 | * route, which is common for FreeBSD. This | |
274 | * should be ignored silently, but logged as an error | |
275 | * otherwise. | |
276 | */ | |
277 | case ZEBRA_ERR_RTEXIST: | |
278 | if (cmd != RTM_ADD) | |
279 | flog_err(EC_LIB_SYSTEM_CALL, | |
280 | "%s: rtm_write() returned %d for command %d", | |
281 | __func__, error, cmd); | |
282 | continue; | |
d62a17ae | 283 | |
86afd529 DS |
284 | /* Note any unexpected status returns */ |
285 | default: | |
31be7dbb RZ |
286 | flog_err( |
287 | EC_LIB_SYSTEM_CALL, | |
2dbe669b DA |
288 | "%s: %pFX: rtm_write() unexpectedly returned %d for command %s", |
289 | __func__, p, error, | |
31be7dbb | 290 | lookup_msg(rtm_type_str, cmd, NULL)); |
86afd529 DS |
291 | break; |
292 | } | |
d62a17ae | 293 | } /* for (ALL_NEXTHOPS(...))*/ |
294 | ||
295 | /* If there was no useful nexthop, then complain. */ | |
560e3136 DS |
296 | if (nexthop_num == 0) { |
297 | if (IS_ZEBRA_DEBUG_KERNEL) | |
31be7dbb | 298 | zlog_debug( |
2dbe669b DA |
299 | "%s: No useful nexthops were found in RIB prefix %pFX", |
300 | __func__, p); | |
560e3136 DS |
301 | return 1; |
302 | } | |
d62a17ae | 303 | |
304 | return 0; /*XXX*/ | |
718e3744 | 305 | } |
306 | ||
01ce7cba MS |
307 | /* |
308 | * Update or delete a prefix from the kernel, | |
309 | * using info from a dataplane context struct. | |
310 | */ | |
25779064 | 311 | enum zebra_dplane_result kernel_route_update(struct zebra_dplane_ctx *ctx) |
01ce7cba MS |
312 | { |
313 | enum zebra_dplane_result res = ZEBRA_DPLANE_REQUEST_SUCCESS; | |
3cdba47a | 314 | uint32_t type, old_type; |
01ce7cba MS |
315 | |
316 | if (dplane_ctx_get_src(ctx) != NULL) { | |
317 | zlog_err("route add: IPv6 sourcedest routes unsupported!"); | |
e677d109 | 318 | return ZEBRA_DPLANE_REQUEST_FAILURE; |
01ce7cba MS |
319 | } |
320 | ||
3cdba47a DS |
321 | type = dplane_ctx_get_type(ctx); |
322 | old_type = dplane_ctx_get_old_type(ctx); | |
323 | ||
0cf6db21 | 324 | frr_with_privs(&zserv_privs) { |
f183e380 | 325 | |
3cdba47a DS |
326 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_DELETE) { |
327 | if (!RSYSTEM_ROUTE(type)) | |
328 | kernel_rtm(RTM_DELETE, dplane_ctx_get_dest(ctx), | |
329 | dplane_ctx_get_ng(ctx), | |
330 | dplane_ctx_get_metric(ctx)); | |
331 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_INSTALL) { | |
332 | if (!RSYSTEM_ROUTE(type)) | |
333 | kernel_rtm(RTM_ADD, dplane_ctx_get_dest(ctx), | |
334 | dplane_ctx_get_ng(ctx), | |
335 | dplane_ctx_get_metric(ctx)); | |
336 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_UPDATE) { | |
f183e380 MS |
337 | /* Must do delete and add separately - |
338 | * no update available | |
339 | */ | |
3cdba47a DS |
340 | if (!RSYSTEM_ROUTE(old_type)) |
341 | kernel_rtm(RTM_DELETE, dplane_ctx_get_dest(ctx), | |
342 | dplane_ctx_get_old_ng(ctx), | |
343 | dplane_ctx_get_old_metric(ctx)); | |
344 | ||
345 | if (!RSYSTEM_ROUTE(type)) | |
346 | kernel_rtm(RTM_ADD, dplane_ctx_get_dest(ctx), | |
347 | dplane_ctx_get_ng(ctx), | |
348 | dplane_ctx_get_metric(ctx)); | |
f183e380 MS |
349 | } else { |
350 | zlog_err("Invalid routing socket update op %s (%u)", | |
351 | dplane_op2str(dplane_ctx_get_op(ctx)), | |
352 | dplane_ctx_get_op(ctx)); | |
353 | res = ZEBRA_DPLANE_REQUEST_FAILURE; | |
354 | } | |
355 | } /* Elevated privs */ | |
01ce7cba | 356 | |
01ce7cba MS |
357 | return res; |
358 | } | |
359 | ||
07cc1745 SW |
360 | enum zebra_dplane_result kernel_nexthop_update(struct zebra_dplane_ctx *ctx) |
361 | { | |
362 | return ZEBRA_DPLANE_REQUEST_SUCCESS; | |
363 | } | |
364 | ||
7723e8d3 PG |
365 | int kernel_neigh_register(vrf_id_t vrf_id, struct zserv *client, bool reg) |
366 | { | |
367 | /* TODO */ | |
368 | return 0; | |
369 | } | |
370 | ||
05657ec2 PG |
371 | int kernel_neigh_update(int add, int ifindex, void *addr, char *lla, int llalen, |
372 | ns_id_t ns_id, uint8_t family, bool permanent) | |
6b8a5694 | 373 | { |
d62a17ae | 374 | /* TODO */ |
375 | return 0; | |
6b8a5694 | 376 | } |
1498c059 | 377 | |
931fa60c MS |
378 | /* NYI on routing-socket platforms, but we've always returned 'success'... */ |
379 | enum zebra_dplane_result kernel_neigh_update_ctx(struct zebra_dplane_ctx *ctx) | |
380 | { | |
381 | return ZEBRA_DPLANE_REQUEST_SUCCESS; | |
382 | } | |
383 | ||
43b5cc5e | 384 | extern int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *mroute) |
1498c059 | 385 | { |
d62a17ae | 386 | return 0; |
1498c059 | 387 | } |
13d60d35 | 388 | |
036d93c0 MS |
389 | /* |
390 | * Update MAC, using dataplane context object. No-op here for now. | |
391 | */ | |
392 | enum zebra_dplane_result kernel_mac_update_ctx(struct zebra_dplane_ctx *ctx) | |
2232a77c | 393 | { |
036d93c0 | 394 | return ZEBRA_DPLANE_REQUEST_SUCCESS; |
2232a77c | 395 | } |
396 | ||
e18747a9 PG |
397 | int kernel_configure_if_link(struct interface *ifp, struct interface *link_ifp, |
398 | ns_id_t ns_id) | |
541025d6 PG |
399 | { |
400 | return 0; | |
401 | } | |
402 | ||
e0ae31b8 DS |
403 | extern int kernel_interface_set_master(struct interface *master, |
404 | struct interface *slave) | |
405 | { | |
406 | return 0; | |
407 | } | |
0ecfe5bf | 408 | |
594c2878 | 409 | uint32_t kernel_get_speed(struct interface *ifp, int *error) |
dc7b3cae DS |
410 | { |
411 | return ifp->speed; | |
412 | } | |
413 | ||
265fa78d AK |
414 | int kernel_upd_mac_nh(uint32_t nh_id, struct in_addr vtep_ip) |
415 | { | |
416 | return 0; | |
417 | } | |
418 | ||
419 | int kernel_del_mac_nh(uint32_t nh_id) | |
420 | { | |
421 | return 0; | |
422 | } | |
423 | ||
424 | int kernel_upd_mac_nhg(uint32_t nhg_id, uint32_t nh_cnt, | |
425 | struct nh_grp *nh_ids) | |
426 | { | |
427 | return 0; | |
428 | } | |
429 | ||
430 | int kernel_del_mac_nhg(uint32_t nhg_id) | |
431 | { | |
432 | return 0; | |
433 | } | |
434 | ||
ddfeb486 | 435 | #endif /* !HAVE_NETLINK */ |