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Commit | Line | Data |
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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
718e3744 | 2 | /* |
3 | * Kernel routing table updates by routing socket. | |
4 | * Copyright (C) 1997, 98 Kunihiro Ishiguro | |
718e3744 | 5 | */ |
6 | ||
7 | #include <zebra.h> | |
ddfeb486 DL |
8 | |
9 | #ifndef HAVE_NETLINK | |
10 | ||
fe6c7157 | 11 | #ifdef __OpenBSD__ |
d3e2c74a RW |
12 | #include <netmpls/mpls.h> |
13 | #endif | |
718e3744 | 14 | |
15 | #include "if.h" | |
16 | #include "prefix.h" | |
17 | #include "sockunion.h" | |
18 | #include "log.h" | |
edd7c245 | 19 | #include "privs.h" |
13d60d35 | 20 | #include "vxlan.h" |
174482ef | 21 | #include "lib_errors.h" |
718e3744 | 22 | |
23 | #include "zebra/debug.h" | |
24 | #include "zebra/rib.h" | |
6621ca86 | 25 | #include "zebra/rt.h" |
dc95824a | 26 | #include "zebra/kernel_socket.h" |
d3e2c74a | 27 | #include "zebra/zebra_mpls.h" |
364fed6b | 28 | #include "zebra/zebra_errors.h" |
718e3744 | 29 | |
edd7c245 | 30 | extern struct zebra_privs_t zserv_privs; |
31 | ||
5e8c8947 | 32 | #ifdef __OpenBSD__ |
8ecdb26e | 33 | static int kernel_rtm_add_labels(struct mpls_label_stack *nh_label, |
5e8c8947 RW |
34 | struct sockaddr_mpls *smpls) |
35 | { | |
36 | if (nh_label->num_labels > 1) { | |
e914ccbe | 37 | flog_warn(EC_ZEBRA_MAX_LABELS_PUSH, |
3efd0893 | 38 | "%s: can't push %u labels at once (maximum is 1)", |
9df414fe | 39 | __func__, nh_label->num_labels); |
5e8c8947 RW |
40 | return -1; |
41 | } | |
42 | ||
43 | memset(smpls, 0, sizeof(*smpls)); | |
44 | smpls->smpls_len = sizeof(*smpls); | |
45 | smpls->smpls_family = AF_MPLS; | |
46 | smpls->smpls_label = htonl(nh_label->label[0] << MPLS_LABEL_OFFSET); | |
47 | ||
48 | return 0; | |
49 | } | |
50 | #endif | |
51 | ||
718e3744 | 52 | /* Interface between zebra message and rtm message. */ |
08ea27d1 DS |
53 | static int kernel_rtm(int cmd, const struct prefix *p, |
54 | const struct nexthop_group *ng, uint32_t metric) | |
718e3744 | 55 | |
56 | { | |
ca2c70bd | 57 | union sockunion sin_dest, sin_mask, sin_gate; |
fe6c7157 | 58 | #ifdef __OpenBSD__ |
d62a17ae | 59 | struct sockaddr_mpls smpls; |
d3e2c74a | 60 | #endif |
d62a17ae | 61 | union sockunion *smplsp = NULL; |
62 | struct nexthop *nexthop; | |
63 | int nexthop_num = 0; | |
64 | ifindex_t ifindex = 0; | |
4dd39a0e | 65 | bool gate = false; |
d62a17ae | 66 | int error; |
981dc13f | 67 | char gate_buf[INET6_BUFSIZ]; |
a8309422 | 68 | enum blackhole_type bh_type = BLACKHOLE_UNSPEC; |
d62a17ae | 69 | |
86afd529 DS |
70 | /* |
71 | * We only have the ability to ADD or DELETE at this point | |
72 | * in time. | |
73 | */ | |
74 | if (cmd != RTM_ADD && cmd != RTM_DELETE) { | |
75 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2dbe669b | 76 | zlog_debug("%s: %pFX odd command %s", __func__, p, |
5ea8213f | 77 | lookup_msg(rtm_type_str, cmd, NULL)); |
86afd529 DS |
78 | return 0; |
79 | } | |
80 | ||
08ea27d1 DS |
81 | memset(&sin_dest, 0, sizeof(sin_dest)); |
82 | memset(&sin_gate, 0, sizeof(sin_gate)); | |
ca2c70bd | 83 | memset(&sin_mask, 0, sizeof(sin_mask)); |
718e3744 | 84 | |
08ea27d1 DS |
85 | switch (p->family) { |
86 | case AF_INET: | |
87 | sin_dest.sin.sin_family = AF_INET; | |
08ea27d1 DS |
88 | sin_dest.sin.sin_addr = p->u.prefix4; |
89 | sin_gate.sin.sin_family = AF_INET; | |
0413dd75 RZ |
90 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
91 | sin_dest.sin.sin_len = sizeof(struct sockaddr_in); | |
92 | sin_gate.sin.sin_len = sizeof(struct sockaddr_in); | |
93 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
08ea27d1 DS |
94 | break; |
95 | case AF_INET6: | |
96 | sin_dest.sin6.sin6_family = AF_INET6; | |
08ea27d1 DS |
97 | sin_dest.sin6.sin6_addr = p->u.prefix6; |
98 | sin_gate.sin6.sin6_family = AF_INET6; | |
0413dd75 RZ |
99 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
100 | sin_dest.sin6.sin6_len = sizeof(struct sockaddr_in6); | |
101 | sin_gate.sin6.sin6_len = sizeof(struct sockaddr_in6); | |
102 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
08ea27d1 DS |
103 | break; |
104 | } | |
718e3744 | 105 | |
d62a17ae | 106 | /* Make gateway. */ |
01ce7cba | 107 | for (ALL_NEXTHOPS_PTR(ng, nexthop)) { |
86afd529 DS |
108 | /* |
109 | * We only want to use the actual good nexthops | |
110 | */ | |
111 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE) || | |
112 | !CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
d62a17ae | 113 | continue; |
114 | ||
c2519893 | 115 | smplsp = NULL; |
4dd39a0e | 116 | gate = false; |
981dc13f | 117 | snprintf(gate_buf, sizeof(gate_buf), "NULL"); |
d62a17ae | 118 | |
86afd529 DS |
119 | switch (nexthop->type) { |
120 | case NEXTHOP_TYPE_IPV4: | |
121 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
122 | sin_gate.sin.sin_addr = nexthop->gate.ipv4; | |
123 | sin_gate.sin.sin_family = AF_INET; | |
0413dd75 RZ |
124 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
125 | sin_gate.sin.sin_len = sizeof(struct sockaddr_in); | |
126 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
86afd529 | 127 | ifindex = nexthop->ifindex; |
4dd39a0e | 128 | gate = true; |
86afd529 DS |
129 | break; |
130 | case NEXTHOP_TYPE_IPV6: | |
131 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
132 | sin_gate.sin6.sin6_addr = nexthop->gate.ipv6; | |
133 | sin_gate.sin6.sin6_family = AF_INET6; | |
0413dd75 RZ |
134 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
135 | sin_gate.sin6.sin6_len = sizeof(struct sockaddr_in6); | |
136 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
86afd529 | 137 | ifindex = nexthop->ifindex; |
08ea27d1 DS |
138 | /* Under kame set interface index to link local address */ |
139 | #ifdef KAME | |
140 | ||
141 | #define SET_IN6_LINKLOCAL_IFINDEX(a, i) \ | |
c9277ebb DS |
142 | do { \ |
143 | (a).s6_addr[2] = ((i) >> 8) & 0xff; \ | |
144 | (a).s6_addr[3] = (i)&0xff; \ | |
145 | } while (0) | |
08ea27d1 | 146 | |
86afd529 DS |
147 | if (IN6_IS_ADDR_LINKLOCAL(&sin_gate.sin6.sin6_addr)) |
148 | SET_IN6_LINKLOCAL_IFINDEX( | |
149 | sin_gate.sin6.sin6_addr, | |
150 | ifindex); | |
08ea27d1 DS |
151 | #endif /* KAME */ |
152 | ||
4dd39a0e | 153 | gate = true; |
86afd529 DS |
154 | break; |
155 | case NEXTHOP_TYPE_IFINDEX: | |
156 | ifindex = nexthop->ifindex; | |
157 | break; | |
158 | case NEXTHOP_TYPE_BLACKHOLE: | |
159 | bh_type = nexthop->bh_type; | |
160 | switch (p->family) { | |
c3d6b386 | 161 | case AF_INET: { |
86afd529 | 162 | struct in_addr loopback; |
381477e8 | 163 | |
86afd529 DS |
164 | loopback.s_addr = htonl(INADDR_LOOPBACK); |
165 | sin_gate.sin.sin_addr = loopback; | |
0413dd75 RZ |
166 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
167 | sin_gate.sin.sin_len = | |
168 | sizeof(struct sockaddr_in); | |
169 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
4dd39a0e | 170 | gate = true; |
381477e8 DS |
171 | } break; |
172 | case AF_INET6: { | |
173 | struct in6_addr loopback; | |
174 | ||
175 | inet_pton(AF_INET6, "::1", &loopback); | |
176 | ||
177 | sin_gate.sin6.sin6_addr = loopback; | |
178 | sin_gate.sin6.sin6_family = AF_INET6; | |
179 | ||
180 | #ifdef HAVE_STRUCTSOCKADDR_SA_LEN | |
181 | sin_gate.sin6.sin6_len = | |
182 | sizeof(struct sockaddr_in6); | |
183 | #endif /* HAVE_STRUCTSOCKADDR_SA_LEN */ | |
184 | gate = true; | |
185 | } break; | |
d62a17ae | 186 | } |
86afd529 DS |
187 | } |
188 | ||
189 | switch (p->family) { | |
190 | case AF_INET: | |
18d10d88 DS |
191 | masklen2ip(p->prefixlen, &sin_mask.sin.sin_addr); |
192 | sin_mask.sin.sin_family = AF_INET; | |
0413dd75 RZ |
193 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
194 | sin_mask.sin.sin_len = sizeof(struct sockaddr_in); | |
195 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
86afd529 DS |
196 | break; |
197 | case AF_INET6: | |
18d10d88 DS |
198 | masklen2ip6(p->prefixlen, &sin_mask.sin6.sin6_addr); |
199 | sin_mask.sin6.sin6_family = AF_INET6; | |
0413dd75 RZ |
200 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
201 | sin_mask.sin6.sin6_len = sizeof(struct sockaddr_in6); | |
202 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
86afd529 DS |
203 | break; |
204 | } | |
718e3744 | 205 | |
fe6c7157 | 206 | #ifdef __OpenBSD__ |
b24204be MS |
207 | if (nexthop->nh_label) { |
208 | if (kernel_rtm_add_labels(nexthop->nh_label, | |
209 | &smpls) != 0) | |
210 | continue; | |
211 | smplsp = (union sockunion *)&smpls; | |
212 | } | |
d3e2c74a | 213 | #endif |
18d10d88 | 214 | error = rtm_write(cmd, &sin_dest, &sin_mask, |
86afd529 DS |
215 | gate ? &sin_gate : NULL, smplsp, |
216 | ifindex, bh_type, metric); | |
217 | ||
218 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
219 | if (!gate) { | |
981dc13f | 220 | zlog_debug( |
2dbe669b DA |
221 | "%s: %pFX: attention! gate not found for re", |
222 | __func__, p); | |
981dc13f RZ |
223 | } else { |
224 | switch (p->family) { | |
c3d6b386 | 225 | case AF_INET: |
981dc13f RZ |
226 | inet_ntop(AF_INET, |
227 | &sin_gate.sin.sin_addr, | |
228 | gate_buf, sizeof(gate_buf)); | |
229 | break; | |
230 | ||
c3d6b386 | 231 | case AF_INET6: |
981dc13f RZ |
232 | inet_ntop(AF_INET6, |
233 | &sin_gate.sin6.sin6_addr, | |
234 | gate_buf, sizeof(gate_buf)); | |
235 | break; | |
236 | ||
237 | default: | |
238 | snprintf(gate_buf, sizeof(gate_buf), | |
239 | "(invalid-af)"); | |
240 | break; | |
241 | } | |
242 | } | |
86afd529 DS |
243 | } |
244 | switch (error) { | |
245 | /* We only flag nexthops as being in FIB if | |
246 | * rtm_write() did its work. */ | |
247 | case ZEBRA_ERR_NOERROR: | |
248 | nexthop_num++; | |
249 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2dbe669b DA |
250 | zlog_debug("%s: %pFX: successfully did NH %s", |
251 | __func__, p, gate_buf); | |
86afd529 DS |
252 | if (cmd == RTM_ADD) |
253 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
254 | break; | |
255 | ||
256 | /* The only valid case for this error is | |
257 | * kernel's failure to install a multipath | |
258 | * route, which is common for FreeBSD. This | |
259 | * should be ignored silently, but logged as an error | |
260 | * otherwise. | |
261 | */ | |
262 | case ZEBRA_ERR_RTEXIST: | |
263 | if (cmd != RTM_ADD) | |
264 | flog_err(EC_LIB_SYSTEM_CALL, | |
265 | "%s: rtm_write() returned %d for command %d", | |
266 | __func__, error, cmd); | |
267 | continue; | |
d62a17ae | 268 | |
86afd529 | 269 | /* Note any unexpected status returns */ |
f2f2a16a DS |
270 | case ZEBRA_ERR_RTNOEXIST: |
271 | if (cmd != RTM_DELETE) | |
272 | flog_err(EC_LIB_SYSTEM_CALL, | |
273 | "%s: rtm_write() returned %d for command %d", | |
274 | __func__, error, cmd); | |
275 | break; | |
86afd529 | 276 | default: |
31be7dbb RZ |
277 | flog_err( |
278 | EC_LIB_SYSTEM_CALL, | |
2dbe669b DA |
279 | "%s: %pFX: rtm_write() unexpectedly returned %d for command %s", |
280 | __func__, p, error, | |
31be7dbb | 281 | lookup_msg(rtm_type_str, cmd, NULL)); |
86afd529 DS |
282 | break; |
283 | } | |
d62a17ae | 284 | } /* for (ALL_NEXTHOPS(...))*/ |
285 | ||
286 | /* If there was no useful nexthop, then complain. */ | |
560e3136 DS |
287 | if (nexthop_num == 0) { |
288 | if (IS_ZEBRA_DEBUG_KERNEL) | |
31be7dbb | 289 | zlog_debug( |
2dbe669b DA |
290 | "%s: No useful nexthops were found in RIB prefix %pFX", |
291 | __func__, p); | |
560e3136 DS |
292 | return 1; |
293 | } | |
d62a17ae | 294 | |
295 | return 0; /*XXX*/ | |
718e3744 | 296 | } |
297 | ||
01ce7cba MS |
298 | /* |
299 | * Update or delete a prefix from the kernel, | |
300 | * using info from a dataplane context struct. | |
301 | */ | |
25779064 | 302 | enum zebra_dplane_result kernel_route_update(struct zebra_dplane_ctx *ctx) |
01ce7cba MS |
303 | { |
304 | enum zebra_dplane_result res = ZEBRA_DPLANE_REQUEST_SUCCESS; | |
3cdba47a | 305 | uint32_t type, old_type; |
01ce7cba MS |
306 | |
307 | if (dplane_ctx_get_src(ctx) != NULL) { | |
308 | zlog_err("route add: IPv6 sourcedest routes unsupported!"); | |
e677d109 | 309 | return ZEBRA_DPLANE_REQUEST_FAILURE; |
01ce7cba MS |
310 | } |
311 | ||
3cdba47a DS |
312 | type = dplane_ctx_get_type(ctx); |
313 | old_type = dplane_ctx_get_old_type(ctx); | |
314 | ||
0cf6db21 | 315 | frr_with_privs(&zserv_privs) { |
f183e380 | 316 | |
3cdba47a DS |
317 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_DELETE) { |
318 | if (!RSYSTEM_ROUTE(type)) | |
319 | kernel_rtm(RTM_DELETE, dplane_ctx_get_dest(ctx), | |
320 | dplane_ctx_get_ng(ctx), | |
321 | dplane_ctx_get_metric(ctx)); | |
322 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_INSTALL) { | |
323 | if (!RSYSTEM_ROUTE(type)) | |
324 | kernel_rtm(RTM_ADD, dplane_ctx_get_dest(ctx), | |
325 | dplane_ctx_get_ng(ctx), | |
326 | dplane_ctx_get_metric(ctx)); | |
327 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_UPDATE) { | |
f183e380 MS |
328 | /* Must do delete and add separately - |
329 | * no update available | |
330 | */ | |
3cdba47a DS |
331 | if (!RSYSTEM_ROUTE(old_type)) |
332 | kernel_rtm(RTM_DELETE, dplane_ctx_get_dest(ctx), | |
333 | dplane_ctx_get_old_ng(ctx), | |
334 | dplane_ctx_get_old_metric(ctx)); | |
335 | ||
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)); | |
f183e380 MS |
340 | } else { |
341 | zlog_err("Invalid routing socket update op %s (%u)", | |
342 | dplane_op2str(dplane_ctx_get_op(ctx)), | |
343 | dplane_ctx_get_op(ctx)); | |
344 | res = ZEBRA_DPLANE_REQUEST_FAILURE; | |
345 | } | |
346 | } /* Elevated privs */ | |
01ce7cba | 347 | |
01ce7cba MS |
348 | return res; |
349 | } | |
350 | ||
07cc1745 SW |
351 | enum zebra_dplane_result kernel_nexthop_update(struct zebra_dplane_ctx *ctx) |
352 | { | |
353 | return ZEBRA_DPLANE_REQUEST_SUCCESS; | |
354 | } | |
355 | ||
7723e8d3 PG |
356 | int kernel_neigh_register(vrf_id_t vrf_id, struct zserv *client, bool reg) |
357 | { | |
358 | /* TODO */ | |
359 | return 0; | |
360 | } | |
361 | ||
05657ec2 PG |
362 | int kernel_neigh_update(int add, int ifindex, void *addr, char *lla, int llalen, |
363 | ns_id_t ns_id, uint8_t family, bool permanent) | |
6b8a5694 | 364 | { |
d62a17ae | 365 | /* TODO */ |
366 | return 0; | |
6b8a5694 | 367 | } |
1498c059 | 368 | |
931fa60c MS |
369 | /* NYI on routing-socket platforms, but we've always returned 'success'... */ |
370 | enum zebra_dplane_result kernel_neigh_update_ctx(struct zebra_dplane_ctx *ctx) | |
371 | { | |
372 | return ZEBRA_DPLANE_REQUEST_SUCCESS; | |
373 | } | |
374 | ||
43b5cc5e | 375 | extern int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *mroute) |
1498c059 | 376 | { |
d62a17ae | 377 | return 0; |
1498c059 | 378 | } |
13d60d35 | 379 | |
036d93c0 MS |
380 | /* |
381 | * Update MAC, using dataplane context object. No-op here for now. | |
382 | */ | |
383 | enum zebra_dplane_result kernel_mac_update_ctx(struct zebra_dplane_ctx *ctx) | |
2232a77c | 384 | { |
036d93c0 | 385 | return ZEBRA_DPLANE_REQUEST_SUCCESS; |
2232a77c | 386 | } |
387 | ||
e0ae31b8 DS |
388 | extern int kernel_interface_set_master(struct interface *master, |
389 | struct interface *slave) | |
390 | { | |
391 | return 0; | |
392 | } | |
0ecfe5bf | 393 | |
594c2878 | 394 | uint32_t kernel_get_speed(struct interface *ifp, int *error) |
dc7b3cae DS |
395 | { |
396 | return ifp->speed; | |
397 | } | |
398 | ||
265fa78d AK |
399 | int kernel_upd_mac_nh(uint32_t nh_id, struct in_addr vtep_ip) |
400 | { | |
401 | return 0; | |
402 | } | |
403 | ||
404 | int kernel_del_mac_nh(uint32_t nh_id) | |
405 | { | |
406 | return 0; | |
407 | } | |
408 | ||
409 | int kernel_upd_mac_nhg(uint32_t nhg_id, uint32_t nh_cnt, | |
410 | struct nh_grp *nh_ids) | |
411 | { | |
412 | return 0; | |
413 | } | |
414 | ||
415 | int kernel_del_mac_nhg(uint32_t nhg_id) | |
416 | { | |
417 | return 0; | |
418 | } | |
419 | ||
ddfeb486 | 420 | #endif /* !HAVE_NETLINK */ |