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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 | ||
746c4f02 | 47 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
718e3744 | 48 | /* Adjust netmask socket length. Return value is a adjusted sin_len |
49 | value. */ | |
d62a17ae | 50 | static int sin_masklen(struct in_addr mask) |
718e3744 | 51 | { |
d62a17ae | 52 | char *p, *lim; |
53 | int len; | |
54 | struct sockaddr_in sin; | |
718e3744 | 55 | |
d62a17ae | 56 | if (mask.s_addr == 0) |
57 | return sizeof(long); | |
718e3744 | 58 | |
d62a17ae | 59 | sin.sin_addr = mask; |
60 | len = sizeof(struct sockaddr_in); | |
718e3744 | 61 | |
d62a17ae | 62 | lim = (char *)&sin.sin_addr; |
63 | p = lim + sizeof(sin.sin_addr); | |
718e3744 | 64 | |
d62a17ae | 65 | while (*--p == 0 && p >= lim) |
66 | len--; | |
67 | return len; | |
718e3744 | 68 | } |
746c4f02 | 69 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
718e3744 | 70 | |
5e8c8947 | 71 | #ifdef __OpenBSD__ |
8ecdb26e | 72 | static int kernel_rtm_add_labels(struct mpls_label_stack *nh_label, |
5e8c8947 RW |
73 | struct sockaddr_mpls *smpls) |
74 | { | |
75 | if (nh_label->num_labels > 1) { | |
e914ccbe | 76 | flog_warn(EC_ZEBRA_MAX_LABELS_PUSH, |
9df414fe QY |
77 | "%s: can't push %u labels at " |
78 | "once (maximum is 1)", | |
79 | __func__, nh_label->num_labels); | |
5e8c8947 RW |
80 | return -1; |
81 | } | |
82 | ||
83 | memset(smpls, 0, sizeof(*smpls)); | |
84 | smpls->smpls_len = sizeof(*smpls); | |
85 | smpls->smpls_family = AF_MPLS; | |
86 | smpls->smpls_label = htonl(nh_label->label[0] << MPLS_LABEL_OFFSET); | |
87 | ||
88 | return 0; | |
89 | } | |
90 | #endif | |
91 | ||
9ba0e570 DS |
92 | #ifdef SIN6_LEN |
93 | /* Calculate sin6_len value for netmask socket value. */ | |
94 | static int sin6_masklen(struct in6_addr mask) | |
95 | { | |
96 | struct sockaddr_in6 sin6; | |
97 | char *p, *lim; | |
98 | int len; | |
99 | ||
100 | if (IN6_IS_ADDR_UNSPECIFIED(&mask)) | |
101 | return sizeof(long); | |
102 | ||
103 | sin6.sin6_addr = mask; | |
104 | len = sizeof(struct sockaddr_in6); | |
105 | ||
106 | lim = (char *)&sin6.sin6_addr; | |
107 | p = lim + sizeof(sin6.sin6_addr); | |
108 | ||
109 | while (*--p == 0 && p >= lim) | |
110 | len--; | |
111 | ||
112 | return len; | |
113 | } | |
114 | #endif /* SIN6_LEN */ | |
115 | ||
718e3744 | 116 | /* Interface between zebra message and rtm message. */ |
08ea27d1 DS |
117 | static int kernel_rtm(int cmd, const struct prefix *p, |
118 | const struct nexthop_group *ng, uint32_t metric) | |
718e3744 | 119 | |
120 | { | |
ca2c70bd DS |
121 | union sockunion *mask = NULL; |
122 | union sockunion sin_dest, sin_mask, sin_gate; | |
fe6c7157 | 123 | #ifdef __OpenBSD__ |
d62a17ae | 124 | struct sockaddr_mpls smpls; |
d3e2c74a | 125 | #endif |
d62a17ae | 126 | union sockunion *smplsp = NULL; |
127 | struct nexthop *nexthop; | |
128 | int nexthop_num = 0; | |
129 | ifindex_t ifindex = 0; | |
130 | int gate = 0; | |
131 | int error; | |
132 | char prefix_buf[PREFIX_STRLEN]; | |
a8309422 | 133 | enum blackhole_type bh_type = BLACKHOLE_UNSPEC; |
d62a17ae | 134 | |
135 | if (IS_ZEBRA_DEBUG_RIB) | |
136 | prefix2str(p, prefix_buf, sizeof(prefix_buf)); | |
718e3744 | 137 | |
08ea27d1 DS |
138 | memset(&sin_dest, 0, sizeof(sin_dest)); |
139 | memset(&sin_gate, 0, sizeof(sin_gate)); | |
ca2c70bd | 140 | memset(&sin_mask, 0, sizeof(sin_mask)); |
718e3744 | 141 | |
08ea27d1 DS |
142 | switch (p->family) { |
143 | case AF_INET: | |
144 | sin_dest.sin.sin_family = AF_INET; | |
145 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN | |
146 | sin_dest.sin.sin_len = sizeof(sin_dest); | |
147 | sin_gate.sin.sin_len = sizeof(sin_gate); | |
148 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ | |
149 | sin_dest.sin.sin_addr = p->u.prefix4; | |
150 | sin_gate.sin.sin_family = AF_INET; | |
151 | break; | |
152 | case AF_INET6: | |
153 | sin_dest.sin6.sin6_family = AF_INET6; | |
154 | #ifdef SIN6_LEN | |
155 | sin_dest.sin6.sin6_len = sizeof(sin_dest); | |
156 | #endif /* SIN6_LEN */ | |
157 | sin_dest.sin6.sin6_addr = p->u.prefix6; | |
158 | sin_gate.sin6.sin6_family = AF_INET6; | |
6f0e3f6e | 159 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
08ea27d1 | 160 | sin_gate.sin6.sin6_len = sizeof(sin_gate); |
6f0e3f6e | 161 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
08ea27d1 DS |
162 | break; |
163 | } | |
718e3744 | 164 | |
d62a17ae | 165 | /* Make gateway. */ |
01ce7cba | 166 | for (ALL_NEXTHOPS_PTR(ng, nexthop)) { |
d62a17ae | 167 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) |
168 | continue; | |
169 | ||
170 | gate = 0; | |
171 | char gate_buf[INET_ADDRSTRLEN] = "NULL"; | |
172 | ||
173 | /* | |
174 | * XXX We need to refrain from kernel operations in some cases, | |
175 | * but this if statement seems overly cautious - what about | |
176 | * other than ADD and DELETE? | |
177 | */ | |
996c9314 | 178 | if ((cmd == RTM_ADD && NEXTHOP_IS_ACTIVE(nexthop->flags)) |
01ce7cba | 179 | || (cmd == RTM_DELETE)) { |
08ea27d1 DS |
180 | switch (nexthop->type) { |
181 | case NEXTHOP_TYPE_IPV4: | |
182 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
ca2c70bd | 183 | sin_gate.sin.sin_addr = nexthop->gate.ipv4; |
08ea27d1 DS |
184 | sin_gate.sin.sin_family = AF_INET; |
185 | ifindex = nexthop->ifindex; | |
d62a17ae | 186 | gate = 1; |
08ea27d1 DS |
187 | break; |
188 | case NEXTHOP_TYPE_IPV6: | |
189 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
190 | sin_gate.sin6.sin6_addr = nexthop->gate.ipv6; | |
191 | sin_gate.sin6.sin6_family = AF_INET6; | |
d62a17ae | 192 | ifindex = nexthop->ifindex; |
08ea27d1 DS |
193 | /* Under kame set interface index to link local address */ |
194 | #ifdef KAME | |
195 | ||
196 | #define SET_IN6_LINKLOCAL_IFINDEX(a, i) \ | |
197 | do { \ | |
198 | (a).s6_addr[2] = ((i) >> 8) & 0xff; \ | |
199 | (a).s6_addr[3] = (i)&0xff; \ | |
200 | } while (0) | |
201 | ||
202 | if (IN6_IS_ADDR_LINKLOCAL( | |
203 | &sin_gate.sin6.sin6_addr)) | |
204 | SET_IN6_LINKLOCAL_IFINDEX( | |
205 | sin_gate.sin6.sin6_addr, | |
206 | ifindex); | |
207 | #endif /* KAME */ | |
208 | ||
d62a17ae | 209 | gate = 1; |
08ea27d1 DS |
210 | break; |
211 | case NEXTHOP_TYPE_IFINDEX: | |
212 | ifindex = nexthop->ifindex; | |
213 | break; | |
214 | case NEXTHOP_TYPE_BLACKHOLE: | |
215 | bh_type = nexthop->bh_type; | |
216 | switch (p->family) { | |
217 | case AFI_IP: { | |
218 | struct in_addr loopback; | |
219 | loopback.s_addr = | |
220 | htonl(INADDR_LOOPBACK); | |
221 | sin_gate.sin.sin_addr = loopback; | |
222 | gate = 1; | |
223 | } | |
224 | break; | |
225 | case AFI_IP6: | |
226 | break; | |
227 | } | |
d62a17ae | 228 | } |
229 | ||
08ea27d1 DS |
230 | switch (p->family) { |
231 | case AF_INET: | |
232 | if (gate && p->prefixlen == 32) | |
233 | mask = NULL; | |
234 | else { | |
235 | masklen2ip(p->prefixlen, | |
236 | &sin_mask.sin.sin_addr); | |
237 | sin_mask.sin.sin_family = AF_INET; | |
6f0e3f6e | 238 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
08ea27d1 DS |
239 | sin_mask.sin.sin_len = sin_masklen( |
240 | sin_mask.sin.sin_addr); | |
6f0e3f6e | 241 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
08ea27d1 DS |
242 | mask = &sin_mask; |
243 | } | |
244 | break; | |
245 | case AF_INET6: | |
246 | if (gate && p->prefixlen == 128) | |
247 | mask = NULL; | |
248 | else { | |
249 | masklen2ip6(p->prefixlen, | |
250 | &sin_mask.sin6.sin6_addr); | |
251 | sin_mask.sin6.sin6_family = AF_INET6; | |
252 | #ifdef SIN6_LEN | |
253 | sin_mask.sin6.sin6_len = sin6_masklen( | |
254 | sin_mask.sin6.sin6_addr); | |
255 | #endif /* SIN6_LEN */ | |
256 | mask = &sin_mask; | |
257 | } | |
258 | break; | |
d62a17ae | 259 | } |
718e3744 | 260 | |
fe6c7157 | 261 | #ifdef __OpenBSD__ |
5e8c8947 RW |
262 | if (nexthop->nh_label |
263 | && !kernel_rtm_add_labels(nexthop->nh_label, | |
264 | &smpls)) | |
265 | continue; | |
266 | smplsp = (union sockunion *)&smpls; | |
d3e2c74a | 267 | #endif |
ca2c70bd DS |
268 | error = rtm_write(cmd, &sin_dest, mask, |
269 | gate ? &sin_gate : NULL, smplsp, | |
270 | ifindex, bh_type, metric); | |
d62a17ae | 271 | |
f183e380 | 272 | if (IS_ZEBRA_DEBUG_KERNEL) { |
d62a17ae | 273 | if (!gate) { |
274 | zlog_debug( | |
01ce7cba MS |
275 | "%s: %s: attention! gate not found for re", |
276 | __func__, prefix_buf); | |
d62a17ae | 277 | } else |
08ea27d1 DS |
278 | inet_ntop(p->family == AFI_IP ? AF_INET |
279 | : AF_INET6, | |
ca2c70bd | 280 | &sin_gate.sin.sin_addr, |
d62a17ae | 281 | gate_buf, INET_ADDRSTRLEN); |
282 | } | |
d62a17ae | 283 | switch (error) { |
08ea27d1 DS |
284 | /* We only flag nexthops as being in FIB if |
285 | * rtm_write() did its work. */ | |
d62a17ae | 286 | case ZEBRA_ERR_NOERROR: |
287 | nexthop_num++; | |
f183e380 | 288 | if (IS_ZEBRA_DEBUG_KERNEL) |
d62a17ae | 289 | zlog_debug( |
290 | "%s: %s: successfully did NH %s", | |
291 | __func__, prefix_buf, gate_buf); | |
f183e380 | 292 | if (cmd == RTM_ADD) |
08ea27d1 | 293 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
d62a17ae | 294 | break; |
295 | ||
08ea27d1 DS |
296 | /* The only valid case for this error is |
297 | * kernel's failure to install a multipath | |
298 | * route, which is common for FreeBSD. This | |
299 | * should be | |
300 | * ignored silently, but logged as an error | |
301 | * otherwise. | |
302 | */ | |
d62a17ae | 303 | case ZEBRA_ERR_RTEXIST: |
304 | if (cmd != RTM_ADD) | |
af4c2728 | 305 | flog_err( |
450971aa | 306 | EC_LIB_SYSTEM_CALL, |
d62a17ae | 307 | "%s: rtm_write() returned %d for command %d", |
308 | __func__, error, cmd); | |
309 | continue; | |
d62a17ae | 310 | |
08ea27d1 | 311 | /* Note any unexpected status returns */ |
d62a17ae | 312 | default: |
af4c2728 | 313 | flog_err( |
450971aa | 314 | EC_LIB_SYSTEM_CALL, |
d62a17ae | 315 | "%s: %s: rtm_write() unexpectedly returned %d for command %s", |
316 | __func__, | |
317 | prefix2str(p, prefix_buf, | |
318 | sizeof(prefix_buf)), | |
319 | error, | |
320 | lookup_msg(rtm_type_str, cmd, NULL)); | |
321 | break; | |
322 | } | |
323 | } /* if (cmd and flags make sense) */ | |
f183e380 | 324 | else if (IS_ZEBRA_DEBUG_KERNEL) |
d62a17ae | 325 | zlog_debug("%s: odd command %s for flags %d", __func__, |
326 | lookup_msg(rtm_type_str, cmd, NULL), | |
327 | nexthop->flags); | |
328 | } /* for (ALL_NEXTHOPS(...))*/ | |
329 | ||
330 | /* If there was no useful nexthop, then complain. */ | |
560e3136 DS |
331 | if (nexthop_num == 0) { |
332 | if (IS_ZEBRA_DEBUG_KERNEL) | |
01ce7cba MS |
333 | zlog_debug("%s: No useful nexthops were found in RIB prefix %s", |
334 | __func__, prefix2str(p, prefix_buf, | |
335 | sizeof(prefix_buf))); | |
560e3136 DS |
336 | return 1; |
337 | } | |
d62a17ae | 338 | |
339 | return 0; /*XXX*/ | |
718e3744 | 340 | } |
341 | ||
01ce7cba MS |
342 | /* |
343 | * Update or delete a prefix from the kernel, | |
344 | * using info from a dataplane context struct. | |
345 | */ | |
25779064 | 346 | enum zebra_dplane_result kernel_route_update(struct zebra_dplane_ctx *ctx) |
01ce7cba MS |
347 | { |
348 | enum zebra_dplane_result res = ZEBRA_DPLANE_REQUEST_SUCCESS; | |
349 | ||
350 | if (dplane_ctx_get_src(ctx) != NULL) { | |
351 | zlog_err("route add: IPv6 sourcedest routes unsupported!"); | |
352 | res = ZEBRA_DPLANE_REQUEST_FAILURE; | |
353 | goto done; | |
354 | } | |
355 | ||
49ddb66a | 356 | frr_elevate_privs(&zserv_privs) { |
f183e380 MS |
357 | |
358 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_DELETE) | |
359 | kernel_rtm(RTM_DELETE, dplane_ctx_get_dest(ctx), | |
360 | dplane_ctx_get_ng(ctx), | |
361 | dplane_ctx_get_metric(ctx)); | |
362 | else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_INSTALL) | |
363 | kernel_rtm(RTM_ADD, dplane_ctx_get_dest(ctx), | |
364 | dplane_ctx_get_ng(ctx), | |
365 | dplane_ctx_get_metric(ctx)); | |
366 | else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_UPDATE) { | |
367 | /* Must do delete and add separately - | |
368 | * no update available | |
369 | */ | |
370 | kernel_rtm(RTM_DELETE, dplane_ctx_get_dest(ctx), | |
371 | dplane_ctx_get_old_ng(ctx), | |
372 | dplane_ctx_get_old_metric(ctx)); | |
373 | ||
374 | kernel_rtm(RTM_ADD, dplane_ctx_get_dest(ctx), | |
375 | dplane_ctx_get_ng(ctx), | |
376 | dplane_ctx_get_metric(ctx)); | |
377 | } else { | |
378 | zlog_err("Invalid routing socket update op %s (%u)", | |
379 | dplane_op2str(dplane_ctx_get_op(ctx)), | |
380 | dplane_ctx_get_op(ctx)); | |
381 | res = ZEBRA_DPLANE_REQUEST_FAILURE; | |
382 | } | |
383 | } /* Elevated privs */ | |
01ce7cba MS |
384 | |
385 | done: | |
386 | ||
387 | return res; | |
388 | } | |
389 | ||
d62a17ae | 390 | int kernel_neigh_update(int add, int ifindex, uint32_t addr, char *lla, |
5895d33f | 391 | int llalen, ns_id_t ns_id) |
6b8a5694 | 392 | { |
d62a17ae | 393 | /* TODO */ |
394 | return 0; | |
6b8a5694 | 395 | } |
1498c059 | 396 | |
43b5cc5e | 397 | extern int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *mroute) |
1498c059 | 398 | { |
d62a17ae | 399 | return 0; |
1498c059 | 400 | } |
13d60d35 | 401 | |
d62a17ae | 402 | int kernel_add_vtep(vni_t vni, struct interface *ifp, struct in_addr *vtep_ip) |
13d60d35 | 403 | { |
d62a17ae | 404 | return 0; |
13d60d35 | 405 | } |
406 | ||
d62a17ae | 407 | int kernel_del_vtep(vni_t vni, struct interface *ifp, struct in_addr *vtep_ip) |
13d60d35 | 408 | { |
d62a17ae | 409 | return 0; |
13d60d35 | 410 | } |
2232a77c | 411 | |
d62a17ae | 412 | int kernel_add_mac(struct interface *ifp, vlanid_t vid, struct ethaddr *mac, |
a37f4598 | 413 | struct in_addr vtep_ip, bool sticky) |
2232a77c | 414 | { |
d62a17ae | 415 | return 0; |
2232a77c | 416 | } |
417 | ||
d62a17ae | 418 | int kernel_del_mac(struct interface *ifp, vlanid_t vid, struct ethaddr *mac, |
d63c1b18 | 419 | struct in_addr vtep_ip) |
2232a77c | 420 | { |
d62a17ae | 421 | return 0; |
2232a77c | 422 | } |
423 | ||
d62a17ae | 424 | int kernel_add_neigh(struct interface *ifp, struct ipaddr *ip, |
68e33151 | 425 | struct ethaddr *mac, uint8_t flags) |
2232a77c | 426 | { |
d62a17ae | 427 | return 0; |
2232a77c | 428 | } |
429 | ||
d62a17ae | 430 | int kernel_del_neigh(struct interface *ifp, struct ipaddr *ip) |
2232a77c | 431 | { |
d62a17ae | 432 | return 0; |
2232a77c | 433 | } |
e0ae31b8 DS |
434 | |
435 | extern int kernel_interface_set_master(struct interface *master, | |
436 | struct interface *slave) | |
437 | { | |
438 | return 0; | |
439 | } | |
0ecfe5bf | 440 | |
dc7b3cae DS |
441 | uint32_t kernel_get_speed(struct interface *ifp) |
442 | { | |
443 | return ifp->speed; | |
444 | } | |
445 | ||
ddfeb486 | 446 | #endif /* !HAVE_NETLINK */ |