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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]; |
d62a17ae | 83 | char prefix_buf[PREFIX_STRLEN]; |
a8309422 | 84 | enum blackhole_type bh_type = BLACKHOLE_UNSPEC; |
d62a17ae | 85 | |
683c06ad | 86 | prefix2str(p, prefix_buf, sizeof(prefix_buf)); |
718e3744 | 87 | |
86afd529 DS |
88 | /* |
89 | * We only have the ability to ADD or DELETE at this point | |
90 | * in time. | |
91 | */ | |
92 | if (cmd != RTM_ADD && cmd != RTM_DELETE) { | |
93 | if (IS_ZEBRA_DEBUG_KERNEL) | |
5ea8213f | 94 | zlog_debug("%s: %s odd command %s", |
86afd529 | 95 | __func__, prefix_buf, |
5ea8213f | 96 | lookup_msg(rtm_type_str, cmd, NULL)); |
86afd529 DS |
97 | return 0; |
98 | } | |
99 | ||
08ea27d1 DS |
100 | memset(&sin_dest, 0, sizeof(sin_dest)); |
101 | memset(&sin_gate, 0, sizeof(sin_gate)); | |
ca2c70bd | 102 | memset(&sin_mask, 0, sizeof(sin_mask)); |
718e3744 | 103 | |
08ea27d1 DS |
104 | switch (p->family) { |
105 | case AF_INET: | |
106 | sin_dest.sin.sin_family = AF_INET; | |
08ea27d1 DS |
107 | sin_dest.sin.sin_addr = p->u.prefix4; |
108 | sin_gate.sin.sin_family = AF_INET; | |
0413dd75 RZ |
109 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
110 | sin_dest.sin.sin_len = sizeof(struct sockaddr_in); | |
111 | sin_gate.sin.sin_len = sizeof(struct sockaddr_in); | |
112 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
08ea27d1 DS |
113 | break; |
114 | case AF_INET6: | |
115 | sin_dest.sin6.sin6_family = AF_INET6; | |
08ea27d1 DS |
116 | sin_dest.sin6.sin6_addr = p->u.prefix6; |
117 | sin_gate.sin6.sin6_family = AF_INET6; | |
0413dd75 RZ |
118 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
119 | sin_dest.sin6.sin6_len = sizeof(struct sockaddr_in6); | |
120 | sin_gate.sin6.sin6_len = sizeof(struct sockaddr_in6); | |
121 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
08ea27d1 DS |
122 | break; |
123 | } | |
718e3744 | 124 | |
d62a17ae | 125 | /* Make gateway. */ |
01ce7cba | 126 | for (ALL_NEXTHOPS_PTR(ng, nexthop)) { |
86afd529 DS |
127 | /* |
128 | * We only want to use the actual good nexthops | |
129 | */ | |
130 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE) || | |
131 | !CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
d62a17ae | 132 | continue; |
133 | ||
c2519893 | 134 | smplsp = NULL; |
4dd39a0e | 135 | gate = false; |
981dc13f | 136 | snprintf(gate_buf, sizeof(gate_buf), "NULL"); |
d62a17ae | 137 | |
86afd529 DS |
138 | switch (nexthop->type) { |
139 | case NEXTHOP_TYPE_IPV4: | |
140 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
141 | sin_gate.sin.sin_addr = nexthop->gate.ipv4; | |
142 | sin_gate.sin.sin_family = AF_INET; | |
0413dd75 RZ |
143 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
144 | sin_gate.sin.sin_len = sizeof(struct sockaddr_in); | |
145 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
86afd529 | 146 | ifindex = nexthop->ifindex; |
4dd39a0e | 147 | gate = true; |
86afd529 DS |
148 | break; |
149 | case NEXTHOP_TYPE_IPV6: | |
150 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
151 | sin_gate.sin6.sin6_addr = nexthop->gate.ipv6; | |
152 | sin_gate.sin6.sin6_family = AF_INET6; | |
0413dd75 RZ |
153 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
154 | sin_gate.sin6.sin6_len = sizeof(struct sockaddr_in6); | |
155 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
86afd529 | 156 | ifindex = nexthop->ifindex; |
08ea27d1 DS |
157 | /* Under kame set interface index to link local address */ |
158 | #ifdef KAME | |
159 | ||
160 | #define SET_IN6_LINKLOCAL_IFINDEX(a, i) \ | |
c9277ebb DS |
161 | do { \ |
162 | (a).s6_addr[2] = ((i) >> 8) & 0xff; \ | |
163 | (a).s6_addr[3] = (i)&0xff; \ | |
164 | } while (0) | |
08ea27d1 | 165 | |
86afd529 DS |
166 | if (IN6_IS_ADDR_LINKLOCAL(&sin_gate.sin6.sin6_addr)) |
167 | SET_IN6_LINKLOCAL_IFINDEX( | |
168 | sin_gate.sin6.sin6_addr, | |
169 | ifindex); | |
08ea27d1 DS |
170 | #endif /* KAME */ |
171 | ||
4dd39a0e | 172 | gate = true; |
86afd529 DS |
173 | break; |
174 | case NEXTHOP_TYPE_IFINDEX: | |
175 | ifindex = nexthop->ifindex; | |
176 | break; | |
177 | case NEXTHOP_TYPE_BLACKHOLE: | |
178 | bh_type = nexthop->bh_type; | |
179 | switch (p->family) { | |
c3d6b386 | 180 | case AF_INET: { |
86afd529 | 181 | struct in_addr loopback; |
381477e8 | 182 | |
86afd529 DS |
183 | loopback.s_addr = htonl(INADDR_LOOPBACK); |
184 | sin_gate.sin.sin_addr = loopback; | |
0413dd75 RZ |
185 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
186 | sin_gate.sin.sin_len = | |
187 | sizeof(struct sockaddr_in); | |
188 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
4dd39a0e | 189 | gate = true; |
381477e8 DS |
190 | } break; |
191 | case AF_INET6: { | |
192 | struct in6_addr loopback; | |
193 | ||
194 | inet_pton(AF_INET6, "::1", &loopback); | |
195 | ||
196 | sin_gate.sin6.sin6_addr = loopback; | |
197 | sin_gate.sin6.sin6_family = AF_INET6; | |
198 | ||
199 | #ifdef HAVE_STRUCTSOCKADDR_SA_LEN | |
200 | sin_gate.sin6.sin6_len = | |
201 | sizeof(struct sockaddr_in6); | |
202 | #endif /* HAVE_STRUCTSOCKADDR_SA_LEN */ | |
203 | gate = true; | |
204 | } break; | |
d62a17ae | 205 | } |
86afd529 DS |
206 | } |
207 | ||
208 | switch (p->family) { | |
209 | case AF_INET: | |
18d10d88 DS |
210 | masklen2ip(p->prefixlen, &sin_mask.sin.sin_addr); |
211 | sin_mask.sin.sin_family = AF_INET; | |
0413dd75 RZ |
212 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
213 | sin_mask.sin.sin_len = sizeof(struct sockaddr_in); | |
214 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
86afd529 DS |
215 | break; |
216 | case AF_INET6: | |
18d10d88 DS |
217 | masklen2ip6(p->prefixlen, &sin_mask.sin6.sin6_addr); |
218 | sin_mask.sin6.sin6_family = AF_INET6; | |
0413dd75 RZ |
219 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
220 | sin_mask.sin6.sin6_len = sizeof(struct sockaddr_in6); | |
221 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
86afd529 DS |
222 | break; |
223 | } | |
718e3744 | 224 | |
fe6c7157 | 225 | #ifdef __OpenBSD__ |
b24204be MS |
226 | if (nexthop->nh_label) { |
227 | if (kernel_rtm_add_labels(nexthop->nh_label, | |
228 | &smpls) != 0) | |
229 | continue; | |
230 | smplsp = (union sockunion *)&smpls; | |
231 | } | |
d3e2c74a | 232 | #endif |
18d10d88 | 233 | error = rtm_write(cmd, &sin_dest, &sin_mask, |
86afd529 DS |
234 | gate ? &sin_gate : NULL, smplsp, |
235 | ifindex, bh_type, metric); | |
236 | ||
237 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
238 | if (!gate) { | |
981dc13f RZ |
239 | zlog_debug( |
240 | "%s: %s: attention! gate not found for re", | |
241 | __func__, prefix_buf); | |
242 | } else { | |
243 | switch (p->family) { | |
c3d6b386 | 244 | case AF_INET: |
981dc13f RZ |
245 | inet_ntop(AF_INET, |
246 | &sin_gate.sin.sin_addr, | |
247 | gate_buf, sizeof(gate_buf)); | |
248 | break; | |
249 | ||
c3d6b386 | 250 | case AF_INET6: |
981dc13f RZ |
251 | inet_ntop(AF_INET6, |
252 | &sin_gate.sin6.sin6_addr, | |
253 | gate_buf, sizeof(gate_buf)); | |
254 | break; | |
255 | ||
256 | default: | |
257 | snprintf(gate_buf, sizeof(gate_buf), | |
258 | "(invalid-af)"); | |
259 | break; | |
260 | } | |
261 | } | |
86afd529 DS |
262 | } |
263 | switch (error) { | |
264 | /* We only flag nexthops as being in FIB if | |
265 | * rtm_write() did its work. */ | |
266 | case ZEBRA_ERR_NOERROR: | |
267 | nexthop_num++; | |
268 | if (IS_ZEBRA_DEBUG_KERNEL) | |
269 | zlog_debug("%s: %s: successfully did NH %s", | |
270 | __func__, prefix_buf, gate_buf); | |
271 | if (cmd == RTM_ADD) | |
272 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
273 | break; | |
274 | ||
275 | /* The only valid case for this error is | |
276 | * kernel's failure to install a multipath | |
277 | * route, which is common for FreeBSD. This | |
278 | * should be ignored silently, but logged as an error | |
279 | * otherwise. | |
280 | */ | |
281 | case ZEBRA_ERR_RTEXIST: | |
282 | if (cmd != RTM_ADD) | |
283 | flog_err(EC_LIB_SYSTEM_CALL, | |
284 | "%s: rtm_write() returned %d for command %d", | |
285 | __func__, error, cmd); | |
286 | continue; | |
d62a17ae | 287 | |
86afd529 DS |
288 | /* Note any unexpected status returns */ |
289 | default: | |
31be7dbb RZ |
290 | flog_err( |
291 | EC_LIB_SYSTEM_CALL, | |
292 | "%s: %s: rtm_write() unexpectedly returned %d for command %s", | |
293 | __func__, prefix_buf, error, | |
294 | lookup_msg(rtm_type_str, cmd, NULL)); | |
86afd529 DS |
295 | break; |
296 | } | |
d62a17ae | 297 | } /* for (ALL_NEXTHOPS(...))*/ |
298 | ||
299 | /* If there was no useful nexthop, then complain. */ | |
560e3136 DS |
300 | if (nexthop_num == 0) { |
301 | if (IS_ZEBRA_DEBUG_KERNEL) | |
31be7dbb RZ |
302 | zlog_debug( |
303 | "%s: No useful nexthops were found in RIB prefix %s", | |
304 | __func__, prefix_buf); | |
560e3136 DS |
305 | return 1; |
306 | } | |
d62a17ae | 307 | |
308 | return 0; /*XXX*/ | |
718e3744 | 309 | } |
310 | ||
01ce7cba MS |
311 | /* |
312 | * Update or delete a prefix from the kernel, | |
313 | * using info from a dataplane context struct. | |
314 | */ | |
25779064 | 315 | enum zebra_dplane_result kernel_route_update(struct zebra_dplane_ctx *ctx) |
01ce7cba MS |
316 | { |
317 | enum zebra_dplane_result res = ZEBRA_DPLANE_REQUEST_SUCCESS; | |
3cdba47a | 318 | uint32_t type, old_type; |
01ce7cba MS |
319 | |
320 | if (dplane_ctx_get_src(ctx) != NULL) { | |
321 | zlog_err("route add: IPv6 sourcedest routes unsupported!"); | |
e677d109 | 322 | return ZEBRA_DPLANE_REQUEST_FAILURE; |
01ce7cba MS |
323 | } |
324 | ||
3cdba47a DS |
325 | type = dplane_ctx_get_type(ctx); |
326 | old_type = dplane_ctx_get_old_type(ctx); | |
327 | ||
0cf6db21 | 328 | frr_with_privs(&zserv_privs) { |
f183e380 | 329 | |
3cdba47a DS |
330 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_DELETE) { |
331 | if (!RSYSTEM_ROUTE(type)) | |
332 | kernel_rtm(RTM_DELETE, dplane_ctx_get_dest(ctx), | |
333 | dplane_ctx_get_ng(ctx), | |
334 | dplane_ctx_get_metric(ctx)); | |
335 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_INSTALL) { | |
336 | if (!RSYSTEM_ROUTE(type)) | |
337 | kernel_rtm(RTM_ADD, dplane_ctx_get_dest(ctx), | |
338 | dplane_ctx_get_ng(ctx), | |
339 | dplane_ctx_get_metric(ctx)); | |
340 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_UPDATE) { | |
f183e380 MS |
341 | /* Must do delete and add separately - |
342 | * no update available | |
343 | */ | |
3cdba47a DS |
344 | if (!RSYSTEM_ROUTE(old_type)) |
345 | kernel_rtm(RTM_DELETE, dplane_ctx_get_dest(ctx), | |
346 | dplane_ctx_get_old_ng(ctx), | |
347 | dplane_ctx_get_old_metric(ctx)); | |
348 | ||
349 | if (!RSYSTEM_ROUTE(type)) | |
350 | kernel_rtm(RTM_ADD, dplane_ctx_get_dest(ctx), | |
351 | dplane_ctx_get_ng(ctx), | |
352 | dplane_ctx_get_metric(ctx)); | |
f183e380 MS |
353 | } else { |
354 | zlog_err("Invalid routing socket update op %s (%u)", | |
355 | dplane_op2str(dplane_ctx_get_op(ctx)), | |
356 | dplane_ctx_get_op(ctx)); | |
357 | res = ZEBRA_DPLANE_REQUEST_FAILURE; | |
358 | } | |
359 | } /* Elevated privs */ | |
01ce7cba | 360 | |
01ce7cba MS |
361 | return res; |
362 | } | |
363 | ||
07cc1745 SW |
364 | enum zebra_dplane_result kernel_nexthop_update(struct zebra_dplane_ctx *ctx) |
365 | { | |
366 | return ZEBRA_DPLANE_REQUEST_SUCCESS; | |
367 | } | |
368 | ||
d62a17ae | 369 | int kernel_neigh_update(int add, int ifindex, uint32_t addr, char *lla, |
5895d33f | 370 | int llalen, ns_id_t ns_id) |
6b8a5694 | 371 | { |
d62a17ae | 372 | /* TODO */ |
373 | return 0; | |
6b8a5694 | 374 | } |
1498c059 | 375 | |
931fa60c MS |
376 | /* NYI on routing-socket platforms, but we've always returned 'success'... */ |
377 | enum zebra_dplane_result kernel_neigh_update_ctx(struct zebra_dplane_ctx *ctx) | |
378 | { | |
379 | return ZEBRA_DPLANE_REQUEST_SUCCESS; | |
380 | } | |
381 | ||
43b5cc5e | 382 | extern int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *mroute) |
1498c059 | 383 | { |
d62a17ae | 384 | return 0; |
1498c059 | 385 | } |
13d60d35 | 386 | |
036d93c0 MS |
387 | /* |
388 | * Update MAC, using dataplane context object. No-op here for now. | |
389 | */ | |
390 | enum zebra_dplane_result kernel_mac_update_ctx(struct zebra_dplane_ctx *ctx) | |
2232a77c | 391 | { |
036d93c0 | 392 | return ZEBRA_DPLANE_REQUEST_SUCCESS; |
2232a77c | 393 | } |
394 | ||
e0ae31b8 DS |
395 | extern int kernel_interface_set_master(struct interface *master, |
396 | struct interface *slave) | |
397 | { | |
398 | return 0; | |
399 | } | |
0ecfe5bf | 400 | |
594c2878 | 401 | uint32_t kernel_get_speed(struct interface *ifp, int *error) |
dc7b3cae DS |
402 | { |
403 | return ifp->speed; | |
404 | } | |
405 | ||
265fa78d AK |
406 | int kernel_upd_mac_nh(uint32_t nh_id, struct in_addr vtep_ip) |
407 | { | |
408 | return 0; | |
409 | } | |
410 | ||
411 | int kernel_del_mac_nh(uint32_t nh_id) | |
412 | { | |
413 | return 0; | |
414 | } | |
415 | ||
416 | int kernel_upd_mac_nhg(uint32_t nhg_id, uint32_t nh_cnt, | |
417 | struct nh_grp *nh_ids) | |
418 | { | |
419 | return 0; | |
420 | } | |
421 | ||
422 | int kernel_del_mac_nhg(uint32_t nhg_id) | |
423 | { | |
424 | return 0; | |
425 | } | |
426 | ||
ddfeb486 | 427 | #endif /* !HAVE_NETLINK */ |