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Commit | Line | Data |
---|---|---|
b1a1faba | 1 | /* |
c01a9466 | 2 | * BIRD -- BSD Routing Table Syncing |
b1a1faba OF |
3 | * |
4 | * (c) 2004 Ondrej Filip <feela@network.cz> | |
5 | * | |
6 | * Can be freely distributed and used under the terms of the GNU GPL. | |
7 | */ | |
8 | ||
9 | #include <stdio.h> | |
c01a9466 | 10 | #include <stdlib.h> |
b1a1faba OF |
11 | #include <ctype.h> |
12 | #include <fcntl.h> | |
13 | #include <unistd.h> | |
14 | #include <sys/param.h> | |
15 | #include <sys/types.h> | |
16 | #include <sys/socket.h> | |
17 | #include <sys/sysctl.h> | |
18 | #include <sys/ioctl.h> | |
19 | #include <netinet/in.h> | |
20 | #include <net/route.h> | |
21 | #include <net/if.h> | |
22 | #include <net/if_dl.h> | |
23 | ||
24 | #undef LOCAL_DEBUG | |
25 | ||
26 | #include "nest/bird.h" | |
27 | #include "nest/iface.h" | |
28 | #include "nest/route.h" | |
29 | #include "nest/protocol.h" | |
30 | #include "nest/iface.h" | |
31 | #include "lib/timer.h" | |
32 | #include "lib/unix.h" | |
33 | #include "lib/krt.h" | |
34 | #include "lib/string.h" | |
35 | #include "lib/socket.h" | |
36 | ||
396dfa90 | 37 | |
c01a9466 OZ |
38 | /* |
39 | * There are significant differences in multiple tables support between BSD variants. | |
40 | * | |
41 | * OpenBSD has table_id field for routes in route socket protocol, therefore all | |
42 | * tables could be managed by one kernel socket. FreeBSD lacks such field, | |
43 | * therefore multiple sockets (locked to specific table using SO_SETFIB socket | |
44 | * option) must be used. | |
45 | * | |
46 | * Both FreeBSD and OpenBSD uses separate scans for each table. In OpenBSD, | |
47 | * table_id is specified explicitly as sysctl scan argument, while in FreeBSD it | |
48 | * is handled implicitly by changing default table using setfib() syscall. | |
49 | * | |
50 | * KRT_SHARED_SOCKET - use shared kernel socked instead of one for each krt_proto | |
51 | * KRT_USE_SETFIB_SCAN - use setfib() for sysctl() route scan | |
52 | * KRT_USE_SETFIB_SOCK - use SO_SETFIB socket option for kernel sockets | |
53 | * KRT_USE_SYSCTL_7 - use 7-th arg of sysctl() as table id for route scans | |
54 | * KRT_USE_SYSCTL_NET_FIBS - use net.fibs sysctl() for dynamic max number of fibs | |
55 | */ | |
56 | ||
57 | #ifdef __FreeBSD__ | |
58 | #define KRT_MAX_TABLES 256 | |
59 | #define KRT_USE_SETFIB_SCAN | |
60 | #define KRT_USE_SETFIB_SOCK | |
61 | #define KRT_USE_SYSCTL_NET_FIBS | |
396dfa90 OZ |
62 | #endif |
63 | ||
c01a9466 OZ |
64 | #ifdef __OpenBSD__ |
65 | #define KRT_MAX_TABLES (RT_TABLEID_MAX+1) | |
66 | #define KRT_SHARED_SOCKET | |
67 | #define KRT_USE_SYSCTL_7 | |
68 | #endif | |
69 | ||
70 | #ifndef KRT_MAX_TABLES | |
71 | #define KRT_MAX_TABLES 1 | |
72 | #endif | |
73 | ||
74 | ||
75 | ||
76 | /* Dynamic max number of tables */ | |
77 | ||
78 | int krt_max_tables; | |
79 | ||
80 | #ifdef KRT_USE_SYSCTL_NET_FIBS | |
81 | ||
82 | static int | |
83 | krt_get_max_tables(void) | |
396dfa90 | 84 | { |
c01a9466 OZ |
85 | int fibs; |
86 | size_t fibs_len = sizeof(fibs); | |
87 | ||
88 | if (sysctlbyname("net.fibs", &fibs, &fibs_len, NULL, 0) < 0) | |
89 | { | |
90 | log(L_WARN "KRT: unable to get max number of fib tables: %m"); | |
91 | return 1; | |
92 | } | |
93 | ||
94 | return MIN(fibs, KRT_MAX_TABLES); | |
95 | } | |
96 | ||
97 | #else | |
98 | ||
99 | static int | |
100 | krt_get_max_tables(void) | |
101 | { | |
102 | return KRT_MAX_TABLES; | |
103 | } | |
104 | ||
105 | #endif /* KRT_USE_SYSCTL_NET_FIBS */ | |
106 | ||
107 | ||
108 | /* setfib() syscall for FreeBSD scans */ | |
109 | ||
110 | #ifdef KRT_USE_SETFIB_SCAN | |
111 | ||
112 | /* | |
113 | static int krt_default_fib; | |
114 | ||
115 | static int | |
116 | krt_get_active_fib(void) | |
117 | { | |
118 | int fib; | |
119 | size_t fib_len = sizeof(fib); | |
120 | ||
121 | if (sysctlbyname("net.my_fibnum", &fib, &fib_len, NULL, 0) < 0) | |
122 | { | |
123 | log(L_WARN "KRT: unable to get active fib number: %m"); | |
124 | return 0; | |
125 | } | |
126 | ||
127 | return fib; | |
128 | } | |
129 | */ | |
130 | ||
131 | extern int setfib(int fib); | |
396dfa90 | 132 | |
c01a9466 | 133 | #endif /* KRT_USE_SETFIB_SCAN */ |
396dfa90 | 134 | |
c01a9466 OZ |
135 | |
136 | /* table_id -> krt_proto map */ | |
137 | ||
138 | #ifdef KRT_SHARED_SOCKET | |
139 | static struct krt_proto *krt_table_map[KRT_MAX_TABLES]; | |
140 | #endif | |
396dfa90 OZ |
141 | |
142 | ||
c01a9466 | 143 | /* Route socket message processing */ |
b1a1faba | 144 | |
b1a1faba OF |
145 | int |
146 | krt_capable(rte *e) | |
147 | { | |
148 | rta *a = e->attrs; | |
149 | ||
b1a1faba OF |
150 | return |
151 | a->cast == RTC_UNICAST && | |
152 | (a->dest == RTD_ROUTER | |
153 | || a->dest == RTD_DEVICE | |
154 | #ifdef RTF_REJECT | |
155 | || a->dest == RTD_UNREACHABLE | |
156 | #endif | |
157 | #ifdef RTF_BLACKHOLE | |
ff2857b0 | 158 | || a->dest == RTD_BLACKHOLE |
b1a1faba OF |
159 | #endif |
160 | ); | |
161 | } | |
162 | ||
c01a9466 OZ |
163 | #ifndef RTAX_MAX |
164 | #define RTAX_MAX 8 | |
165 | #endif | |
166 | ||
167 | struct ks_msg | |
168 | { | |
169 | struct rt_msghdr rtm; | |
170 | struct sockaddr_storage buf[RTAX_MAX]; | |
171 | }; | |
172 | ||
b1a1faba OF |
173 | #define ROUNDUP(a) \ |
174 | ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) | |
175 | ||
176 | #define NEXTADDR(w, u) \ | |
177 | if (msg.rtm.rtm_addrs & (w)) {\ | |
178 | l = ROUNDUP(((struct sockaddr *)&(u))->sa_len);\ | |
179 | memmove(body, &(u), l); body += l;} | |
180 | ||
ff2857b0 OZ |
181 | #define GETADDR(p, F) \ |
182 | bzero(p, sizeof(*p));\ | |
183 | if ((addrs & (F)) && ((struct sockaddr *)body)->sa_len) {\ | |
ae80a2de | 184 | uint l = ROUNDUP(((struct sockaddr *)body)->sa_len);\ |
ff2857b0 OZ |
185 | memcpy(p, body, (l > sizeof(*p) ? sizeof(*p) : l));\ |
186 | body += l;} | |
187 | ||
32f95476 | 188 | static int |
c01a9466 | 189 | krt_send_route(struct krt_proto *p, int cmd, rte *e) |
b1a1faba OF |
190 | { |
191 | net *net = e->net; | |
192 | rta *a = e->attrs; | |
193 | static int msg_seq; | |
194 | struct iface *j, *i = a->iface; | |
195 | int l; | |
196 | struct ks_msg msg; | |
197 | char *body = (char *)msg.buf; | |
198 | sockaddr gate, mask, dst; | |
44aa101c | 199 | ip_addr gw; |
b1a1faba | 200 | |
ff2857b0 | 201 | DBG("krt-sock: send %I/%d via %I\n", net->n.prefix, net->n.pxlen, a->gw); |
b1a1faba | 202 | |
b88a1d40 | 203 | bzero(&msg,sizeof (struct rt_msghdr)); |
b1a1faba OF |
204 | msg.rtm.rtm_version = RTM_VERSION; |
205 | msg.rtm.rtm_type = cmd; | |
206 | msg.rtm.rtm_seq = msg_seq++; | |
207 | msg.rtm.rtm_addrs = RTA_DST; | |
ff2857b0 | 208 | msg.rtm.rtm_flags = RTF_UP | RTF_PROTO1; |
b1a1faba | 209 | |
ff2857b0 | 210 | if (net->n.pxlen == MAX_PREFIX_LENGTH) |
b1a1faba | 211 | msg.rtm.rtm_flags |= RTF_HOST; |
b1a1faba | 212 | else |
b1a1faba | 213 | msg.rtm.rtm_addrs |= RTA_NETMASK; |
c01a9466 OZ |
214 | |
215 | #ifdef KRT_SHARED_SOCKET | |
216 | msg.rtm.rtm_tableid = KRT_CF->sys.table_id; | |
217 | #endif | |
b1a1faba OF |
218 | |
219 | #ifdef RTF_REJECT | |
220 | if(a->dest == RTD_UNREACHABLE) | |
221 | msg.rtm.rtm_flags |= RTF_REJECT; | |
222 | #endif | |
223 | #ifdef RTF_BLACKHOLE | |
224 | if(a->dest == RTD_BLACKHOLE) | |
225 | msg.rtm.rtm_flags |= RTF_BLACKHOLE; | |
226 | #endif | |
227 | ||
228 | /* This is really very nasty, but I'm not able | |
229 | * to add "(reject|blackhole)" route without | |
230 | * gateway set | |
231 | */ | |
232 | if(!i) | |
233 | { | |
8281ff20 | 234 | i = HEAD(iface_list); |
77772dbc | 235 | |
8281ff20 OF |
236 | WALK_LIST(j, iface_list) |
237 | { | |
238 | if (j->flags & IF_LOOPBACK) | |
b1a1faba | 239 | { |
8281ff20 OF |
240 | i = j; |
241 | break; | |
b1a1faba OF |
242 | } |
243 | } | |
244 | } | |
245 | ||
44aa101c OZ |
246 | gw = a->gw; |
247 | ||
248 | #ifdef IPV6 | |
249 | /* Embed interface ID to link-local address */ | |
304ac2e8 | 250 | if (ipa_is_link_local(gw)) |
44aa101c OZ |
251 | _I0(gw) = 0xfe800000 | (i->index & 0x0000ffff); |
252 | #endif | |
253 | ||
05476c4d OZ |
254 | sockaddr_fill(&dst, BIRD_AF, net->n.prefix, NULL, 0); |
255 | sockaddr_fill(&mask, BIRD_AF, ipa_mkmask(net->n.pxlen), NULL, 0); | |
256 | sockaddr_fill(&gate, BIRD_AF, gw, NULL, 0); | |
44aa101c | 257 | |
b1a1faba OF |
258 | switch (a->dest) |
259 | { | |
260 | case RTD_ROUTER: | |
261 | msg.rtm.rtm_flags |= RTF_GATEWAY; | |
262 | msg.rtm.rtm_addrs |= RTA_GATEWAY; | |
263 | break; | |
029ec22d | 264 | |
b1a1faba OF |
265 | #ifdef RTF_REJECT |
266 | case RTD_UNREACHABLE: | |
267 | #endif | |
268 | #ifdef RTF_BLACKHOLE | |
269 | case RTD_BLACKHOLE: | |
270 | #endif | |
271 | case RTD_DEVICE: | |
272 | if(i) | |
273 | { | |
7d196668 | 274 | #ifdef RTF_CLONING |
b1a1faba OF |
275 | if (cmd == RTM_ADD && (i->flags & IF_MULTIACCESS) != IF_MULTIACCESS) /* PTP */ |
276 | msg.rtm.rtm_flags |= RTF_CLONING; | |
7d196668 | 277 | #endif |
b1a1faba OF |
278 | |
279 | if(!i->addr) { | |
c429d4a4 | 280 | log(L_ERR "KRT: interface %s has no IP addess", i->name); |
32f95476 | 281 | return -1; |
b1a1faba OF |
282 | } |
283 | ||
029ec22d | 284 | sockaddr_fill(&gate, BIRD_AF, i->addr->ip, NULL, 0); |
b1a1faba OF |
285 | msg.rtm.rtm_addrs |= RTA_GATEWAY; |
286 | } | |
b1a1faba OF |
287 | break; |
288 | default: | |
289 | bug("krt-sock: unknown flags, but not filtered"); | |
290 | } | |
291 | ||
1554cc02 | 292 | msg.rtm.rtm_index = i->index; |
b1a1faba OF |
293 | |
294 | NEXTADDR(RTA_DST, dst); | |
295 | NEXTADDR(RTA_GATEWAY, gate); | |
296 | NEXTADDR(RTA_NETMASK, mask); | |
297 | ||
298 | l = body - (char *)&msg; | |
299 | msg.rtm.rtm_msglen = l; | |
300 | ||
c01a9466 | 301 | if ((l = write(p->sys.sk->fd, (char *)&msg, l)) < 0) { |
1cb97af4 | 302 | log(L_ERR "KRT: Error sending route %I/%d to kernel: %m", net->n.prefix, net->n.pxlen); |
32f95476 | 303 | return -1; |
b1a1faba | 304 | } |
32f95476 OZ |
305 | |
306 | return 0; | |
b1a1faba OF |
307 | } |
308 | ||
309 | void | |
c01a9466 | 310 | krt_replace_rte(struct krt_proto *p, net *n, rte *new, rte *old, |
7a2c48da | 311 | struct ea_list *eattrs UNUSED) |
b1a1faba | 312 | { |
32f95476 OZ |
313 | int err = 0; |
314 | ||
b1a1faba | 315 | if (old) |
c01a9466 | 316 | krt_send_route(p, RTM_DELETE, old); |
32f95476 | 317 | |
b1a1faba | 318 | if (new) |
c01a9466 | 319 | err = krt_send_route(p, RTM_ADD, new); |
32f95476 OZ |
320 | |
321 | if (err < 0) | |
322 | n->n.flags |= KRF_SYNC_ERROR; | |
323 | else | |
324 | n->n.flags &= ~KRF_SYNC_ERROR; | |
b1a1faba OF |
325 | } |
326 | ||
ff2857b0 OZ |
327 | #define SKIP(ARG...) do { DBG("KRT: Ignoring route - " ARG); return; } while(0) |
328 | ||
282997f2 | 329 | static void |
c01a9466 | 330 | krt_read_route(struct ks_msg *msg, struct krt_proto *p, int scan) |
b1a1faba | 331 | { |
c01a9466 OZ |
332 | /* p is NULL iff KRT_SHARED_SOCKET and !scan */ |
333 | ||
b1a1faba OF |
334 | rte *e; |
335 | net *net; | |
ff2857b0 | 336 | sockaddr dst, gate, mask; |
b1a1faba OF |
337 | ip_addr idst, igate, imask; |
338 | void *body = (char *)msg->buf; | |
90097f4f | 339 | int new = (msg->rtm.rtm_type != RTM_DELETE); |
ff2857b0 | 340 | char *errmsg = "KRT: Invalid route received"; |
b1a1faba OF |
341 | int flags = msg->rtm.rtm_flags; |
342 | int addrs = msg->rtm.rtm_addrs; | |
72aed1a0 OZ |
343 | int src; |
344 | byte src2; | |
b1a1faba | 345 | |
ff2857b0 OZ |
346 | if (!(flags & RTF_UP) && scan) |
347 | SKIP("not up in scan\n"); | |
b1a1faba | 348 | |
ff2857b0 OZ |
349 | if (!(flags & RTF_DONE) && !scan) |
350 | SKIP("not done in async\n"); | |
b1a1faba | 351 | |
ff2857b0 OZ |
352 | if (flags & RTF_LLINFO) |
353 | SKIP("link-local\n"); | |
b1a1faba | 354 | |
c01a9466 OZ |
355 | #ifdef KRT_SHARED_SOCKET |
356 | if (!scan) | |
357 | { | |
358 | int table_id = msg->rtm.rtm_tableid; | |
359 | p = (table_id < KRT_MAX_TABLES) ? krt_table_map[table_id] : NULL; | |
360 | ||
361 | if (!p) | |
362 | SKIP("unknown table id %d\n", table_id); | |
363 | } | |
364 | #endif | |
365 | ||
ff2857b0 OZ |
366 | GETADDR(&dst, RTA_DST); |
367 | GETADDR(&gate, RTA_GATEWAY); | |
368 | GETADDR(&mask, RTA_NETMASK); | |
b1a1faba | 369 | |
05476c4d | 370 | if (dst.sa.sa_family != BIRD_AF) |
ff2857b0 | 371 | SKIP("invalid DST"); |
b1a1faba | 372 | |
05476c4d OZ |
373 | idst = ipa_from_sa(&dst); |
374 | imask = ipa_from_sa(&mask); | |
375 | igate = (gate.sa.sa_family == BIRD_AF) ? ipa_from_sa(&gate) : IPA_NONE; | |
b1a1faba | 376 | |
ff2857b0 OZ |
377 | /* We do not test family for RTA_NETMASK, because BSD sends us |
378 | some strange values, but interpreting them as IPv4/IPv6 works */ | |
05476c4d | 379 | |
b1a1faba | 380 | |
ff2857b0 OZ |
381 | int c = ipa_classify_net(idst); |
382 | if ((c < 0) || !(c & IADDR_HOST) || ((c & IADDR_SCOPE_MASK) <= SCOPE_LINK)) | |
383 | SKIP("strange class/scope\n"); | |
b1a1faba | 384 | |
88a183c6 | 385 | int pxlen = (flags & RTF_HOST) ? MAX_PREFIX_LENGTH : ipa_masklen(imask); |
ff2857b0 OZ |
386 | if (pxlen < 0) |
387 | { log(L_ERR "%s (%I) - netmask %I", errmsg, idst, imask); return; } | |
b1a1faba | 388 | |
ff2857b0 OZ |
389 | if ((flags & RTF_GATEWAY) && ipa_zero(igate)) |
390 | { log(L_ERR "%s (%I/%d) - missing gateway", errmsg, idst, pxlen); return; } | |
391 | ||
392 | u32 self_mask = RTF_PROTO1; | |
a9f380fe | 393 | u32 alien_mask = RTF_STATIC | RTF_PROTO1 | RTF_GATEWAY; |
ff2857b0 | 394 | |
72aed1a0 OZ |
395 | src2 = (flags & RTF_STATIC) ? 1 : 0; |
396 | src2 |= (flags & RTF_PROTO1) ? 2 : 0; | |
397 | ||
ff2857b0 OZ |
398 | #ifdef RTF_PROTO2 |
399 | alien_mask |= RTF_PROTO2; | |
72aed1a0 | 400 | src2 |= (flags & RTF_PROTO2) ? 4 : 0; |
ff2857b0 | 401 | #endif |
b1a1faba | 402 | |
ff2857b0 OZ |
403 | #ifdef RTF_PROTO3 |
404 | alien_mask |= RTF_PROTO3; | |
72aed1a0 | 405 | src2 |= (flags & RTF_PROTO3) ? 8 : 0; |
ff2857b0 OZ |
406 | #endif |
407 | ||
a9f380fe OZ |
408 | #ifdef RTF_REJECT |
409 | alien_mask |= RTF_REJECT; | |
410 | #endif | |
411 | ||
412 | #ifdef RTF_BLACKHOLE | |
413 | alien_mask |= RTF_BLACKHOLE; | |
414 | #endif | |
415 | ||
ff2857b0 OZ |
416 | if (flags & (RTF_DYNAMIC | RTF_MODIFIED)) |
417 | src = KRT_SRC_REDIRECT; | |
418 | else if (flags & self_mask) | |
419 | { | |
420 | if (!scan) | |
421 | SKIP("echo\n"); | |
422 | src = KRT_SRC_BIRD; | |
423 | } | |
424 | else if (flags & alien_mask) | |
425 | src = KRT_SRC_ALIEN; | |
426 | else | |
427 | src = KRT_SRC_KERNEL; | |
428 | ||
429 | net = net_get(p->p.table, idst, pxlen); | |
b1a1faba | 430 | |
cfe34a31 | 431 | rta a = { |
094d2bdb | 432 | .src = p->p.main_source, |
cfe34a31 OZ |
433 | .source = RTS_INHERIT, |
434 | .scope = SCOPE_UNIVERSE, | |
435 | .cast = RTC_UNICAST | |
436 | }; | |
b1a1faba | 437 | |
ff2857b0 OZ |
438 | /* reject/blackhole routes have also set RTF_GATEWAY, |
439 | we wil check them first. */ | |
b1a1faba OF |
440 | |
441 | #ifdef RTF_REJECT | |
442 | if(flags & RTF_REJECT) { | |
443 | a.dest = RTD_UNREACHABLE; | |
ff2857b0 | 444 | goto done; |
b1a1faba OF |
445 | } |
446 | #endif | |
447 | ||
448 | #ifdef RTF_BLACKHOLE | |
449 | if(flags & RTF_BLACKHOLE) { | |
450 | a.dest = RTD_BLACKHOLE; | |
ff2857b0 | 451 | goto done; |
b1a1faba OF |
452 | } |
453 | #endif | |
454 | ||
ff2857b0 OZ |
455 | a.iface = if_find_by_index(msg->rtm.rtm_index); |
456 | if (!a.iface) | |
457 | { | |
458 | log(L_ERR "KRT: Received route %I/%d with unknown ifindex %u", | |
459 | net->n.prefix, net->n.pxlen, msg->rtm.rtm_index); | |
460 | return; | |
461 | } | |
462 | ||
463 | if (flags & RTF_GATEWAY) | |
b1a1faba | 464 | { |
ff2857b0 OZ |
465 | neighbor *ng; |
466 | a.dest = RTD_ROUTER; | |
467 | a.gw = igate; | |
b1a1faba | 468 | |
44aa101c OZ |
469 | #ifdef IPV6 |
470 | /* Clean up embedded interface ID returned in link-local address */ | |
304ac2e8 | 471 | if (ipa_is_link_local(a.gw)) |
44aa101c OZ |
472 | _I0(a.gw) = 0xfe800000; |
473 | #endif | |
474 | ||
ff2857b0 OZ |
475 | ng = neigh_find2(&p->p, &a.gw, a.iface, 0); |
476 | if (!ng || (ng->scope == SCOPE_HOST)) | |
477 | { | |
de14a7c7 OZ |
478 | /* Ignore routes with next-hop 127.0.0.1, host routes with such |
479 | next-hop appear on OpenBSD for address aliases. */ | |
480 | if (ipa_classify(a.gw) == (IADDR_HOST | SCOPE_HOST)) | |
481 | return; | |
482 | ||
ff2857b0 OZ |
483 | log(L_ERR "KRT: Received route %I/%d with strange next-hop %I", |
484 | net->n.prefix, net->n.pxlen, a.gw); | |
485 | return; | |
486 | } | |
487 | } | |
488 | else | |
489 | a.dest = RTD_DEVICE; | |
b1a1faba | 490 | |
ff2857b0 | 491 | done: |
b1a1faba OF |
492 | e = rte_get_temp(&a); |
493 | e->net = net; | |
494 | e->u.krt.src = src; | |
72aed1a0 | 495 | e->u.krt.proto = src2; |
e86cfd41 OZ |
496 | e->u.krt.seen = 0; |
497 | e->u.krt.best = 0; | |
b1a1faba OF |
498 | e->u.krt.metric = 0; |
499 | ||
500 | if (scan) | |
501 | krt_got_route(p, e); | |
502 | else | |
503 | krt_got_route_async(p, e, new); | |
504 | } | |
505 | ||
09686693 OZ |
506 | static void |
507 | krt_read_ifannounce(struct ks_msg *msg) | |
508 | { | |
509 | struct if_announcemsghdr *ifam = (struct if_announcemsghdr *)&msg->rtm; | |
510 | ||
511 | if (ifam->ifan_what == IFAN_ARRIVAL) | |
512 | { | |
513 | /* Not enough info to create the iface, so we just trigger iface scan */ | |
514 | kif_request_scan(); | |
515 | } | |
516 | else if (ifam->ifan_what == IFAN_DEPARTURE) | |
517 | { | |
518 | struct iface *iface = if_find_by_index(ifam->ifan_index); | |
519 | ||
520 | /* Interface is destroyed */ | |
521 | if (!iface) | |
522 | { | |
523 | DBG("KRT: unknown interface (%s, #%d) going down. Ignoring\n", ifam->ifan_name, ifam->ifan_index); | |
524 | return; | |
525 | } | |
526 | ||
527 | if_delete(iface); | |
528 | } | |
529 | ||
530 | DBG("KRT: IFANNOUNCE what: %d index %d name %s\n", ifam->ifan_what, ifam->ifan_index, ifam->ifan_name); | |
531 | } | |
532 | ||
282997f2 | 533 | static void |
3216eb03 | 534 | krt_read_ifinfo(struct ks_msg *msg, int scan) |
b1a1faba OF |
535 | { |
536 | struct if_msghdr *ifm = (struct if_msghdr *)&msg->rtm; | |
537 | void *body = (void *)(ifm + 1); | |
538 | struct sockaddr_dl *dl = NULL; | |
ae80a2de | 539 | uint i; |
732a0a25 | 540 | struct iface *iface = NULL, f = {}; |
b1a1faba | 541 | int fl = ifm->ifm_flags; |
732a0a25 | 542 | int nlen = 0; |
b1a1faba | 543 | |
d32a071d | 544 | for (i = 1; i<=RTA_IFP; i <<= 1) |
b1a1faba | 545 | { |
d32a071d | 546 | if (i & ifm->ifm_addrs) |
b1a1faba | 547 | { |
d32a071d | 548 | if (i == RTA_IFP) |
b1a1faba OF |
549 | { |
550 | dl = (struct sockaddr_dl *)body; | |
551 | break; | |
552 | } | |
d32a071d | 553 | body += ROUNDUP(((struct sockaddr *)&(body))->sa_len); |
b1a1faba OF |
554 | } |
555 | } | |
556 | ||
732a0a25 | 557 | if (dl && (dl->sdl_family != AF_LINK)) |
b1a1faba | 558 | { |
09686693 | 559 | log(L_WARN "Ignoring strange IFINFO"); |
b1a1faba OF |
560 | return; |
561 | } | |
562 | ||
732a0a25 OZ |
563 | if (dl) |
564 | nlen = MIN(sizeof(f.name)-1, dl->sdl_nlen); | |
565 | ||
566 | /* Note that asynchronous IFINFO messages do not contain iface | |
567 | name, so we have to found an existing iface by iface index */ | |
b1a1faba | 568 | |
732a0a25 OZ |
569 | iface = if_find_by_index(ifm->ifm_index); |
570 | if (!iface) | |
b1a1faba OF |
571 | { |
572 | /* New interface */ | |
732a0a25 OZ |
573 | if (!dl) |
574 | return; /* No interface name, ignoring */ | |
dad7ee70 | 575 | |
732a0a25 OZ |
576 | memcpy(f.name, dl->sdl_data, nlen); |
577 | DBG("New interface '%s' found\n", f.name); | |
578 | } | |
579 | else if (dl && memcmp(iface->name, dl->sdl_data, nlen)) | |
580 | { | |
581 | /* Interface renamed */ | |
582 | if_delete(iface); | |
583 | memcpy(f.name, dl->sdl_data, nlen); | |
b1a1faba OF |
584 | } |
585 | else | |
586 | { | |
732a0a25 OZ |
587 | /* Old interface */ |
588 | memcpy(f.name, iface->name, sizeof(f.name)); | |
b1a1faba OF |
589 | } |
590 | ||
732a0a25 | 591 | f.index = ifm->ifm_index; |
b1a1faba | 592 | f.mtu = ifm->ifm_data.ifi_mtu; |
b1a1faba OF |
593 | |
594 | if (fl & IFF_UP) | |
f25cb0ef OZ |
595 | f.flags |= IF_ADMIN_UP; |
596 | if (ifm->ifm_data.ifi_link_state != LINK_STATE_DOWN) | |
597 | f.flags |= IF_LINK_UP; /* up or unknown */ | |
b1a1faba OF |
598 | if (fl & IFF_LOOPBACK) /* Loopback */ |
599 | f.flags |= IF_MULTIACCESS | IF_LOOPBACK | IF_IGNORE; | |
600 | else if (fl & IFF_POINTOPOINT) /* PtP */ | |
601 | f.flags |= IF_MULTICAST; | |
602 | else if (fl & IFF_BROADCAST) /* Broadcast */ | |
603 | f.flags |= IF_MULTIACCESS | IF_BROADCAST | IF_MULTICAST; | |
604 | else | |
605 | f.flags |= IF_MULTIACCESS; /* NBMA */ | |
606 | ||
3216eb03 OZ |
607 | iface = if_update(&f); |
608 | ||
609 | if (!scan) | |
610 | if_end_partial_update(iface); | |
b1a1faba OF |
611 | } |
612 | ||
282997f2 | 613 | static void |
3216eb03 | 614 | krt_read_addr(struct ks_msg *msg, int scan) |
b1a1faba OF |
615 | { |
616 | struct ifa_msghdr *ifam = (struct ifa_msghdr *)&msg->rtm; | |
617 | void *body = (void *)(ifam + 1); | |
618 | sockaddr addr, mask, brd; | |
b1a1faba OF |
619 | struct iface *iface = NULL; |
620 | struct ifa ifa; | |
621 | struct sockaddr null; | |
622 | ip_addr iaddr, imask, ibrd; | |
623 | int addrs = ifam->ifam_addrs; | |
624 | int scope, masklen = -1; | |
625 | int new = (ifam->ifam_type == RTM_NEWADDR); | |
b1a1faba | 626 | |
ff2857b0 OZ |
627 | /* Strange messages with zero (invalid) ifindex appear on OpenBSD */ |
628 | if (ifam->ifam_index == 0) | |
629 | return; | |
630 | ||
b1a1faba OF |
631 | if(!(iface = if_find_by_index(ifam->ifam_index))) |
632 | { | |
633 | log(L_ERR "KIF: Received address message for unknown interface %d", ifam->ifam_index); | |
634 | return; | |
635 | } | |
636 | ||
637 | GETADDR (&null, RTA_DST); | |
638 | GETADDR (&null, RTA_GATEWAY); | |
639 | GETADDR (&mask, RTA_NETMASK); | |
640 | GETADDR (&null, RTA_GENMASK); | |
641 | GETADDR (&null, RTA_IFP); | |
642 | GETADDR (&addr, RTA_IFA); | |
643 | GETADDR (&null, RTA_AUTHOR); | |
644 | GETADDR (&brd, RTA_BRD); | |
645 | ||
ff2857b0 | 646 | /* Some other family address */ |
05476c4d | 647 | if (addr.sa.sa_family != BIRD_AF) |
ff2857b0 | 648 | return; |
b1a1faba | 649 | |
05476c4d OZ |
650 | iaddr = ipa_from_sa(&addr); |
651 | imask = ipa_from_sa(&mask); | |
652 | ibrd = ipa_from_sa(&brd); | |
653 | ||
b1a1faba | 654 | |
88a183c6 | 655 | if ((masklen = ipa_masklen(imask)) < 0) |
b1a1faba | 656 | { |
64534ea2 | 657 | log(L_ERR "KIF: Invalid masklen %I for %s", imask, iface->name); |
b1a1faba OF |
658 | return; |
659 | } | |
660 | ||
64534ea2 OZ |
661 | #ifdef IPV6 |
662 | /* Clean up embedded interface ID returned in link-local address */ | |
b1a1faba | 663 | |
304ac2e8 | 664 | if (ipa_is_link_local(iaddr)) |
64534ea2 | 665 | _I0(iaddr) = 0xfe800000; |
b1a1faba | 666 | |
304ac2e8 | 667 | if (ipa_is_link_local(ibrd)) |
64534ea2 OZ |
668 | _I0(ibrd) = 0xfe800000; |
669 | #endif | |
b1a1faba | 670 | |
b1a1faba | 671 | |
64534ea2 OZ |
672 | bzero(&ifa, sizeof(ifa)); |
673 | ifa.iface = iface; | |
674 | ifa.ip = iaddr; | |
b1a1faba | 675 | ifa.pxlen = masklen; |
b1a1faba OF |
676 | |
677 | scope = ipa_classify(ifa.ip); | |
b1a1faba OF |
678 | if (scope < 0) |
679 | { | |
680 | log(L_ERR "KIF: Invalid interface address %I for %s", ifa.ip, iface->name); | |
681 | return; | |
682 | } | |
683 | ifa.scope = scope & IADDR_SCOPE_MASK; | |
684 | ||
f515e229 | 685 | if (masklen < BITS_PER_IP_ADDRESS) |
ba321706 | 686 | { |
afa9f66c | 687 | ifa.prefix = ipa_and(ifa.ip, ipa_mkmask(masklen)); |
ba321706 | 688 | |
9b061f7e | 689 | if (masklen == (BITS_PER_IP_ADDRESS - 1)) |
ba321706 OZ |
690 | ifa.opposite = ipa_opposite_m1(ifa.ip); |
691 | ||
692 | #ifndef IPV6 | |
9b061f7e | 693 | if (masklen == (BITS_PER_IP_ADDRESS - 2)) |
ba321706 OZ |
694 | ifa.opposite = ipa_opposite_m2(ifa.ip); |
695 | #endif | |
f515e229 | 696 | |
64534ea2 OZ |
697 | if (iface->flags & IF_BROADCAST) |
698 | ifa.brd = ibrd; | |
699 | ||
f515e229 | 700 | if (!(iface->flags & IF_MULTIACCESS)) |
64534ea2 | 701 | ifa.opposite = ibrd; |
ba321706 | 702 | } |
64534ea2 | 703 | else if (!(iface->flags & IF_MULTIACCESS) && ipa_nonzero(ibrd)) |
afa9f66c | 704 | { |
64534ea2 | 705 | ifa.prefix = ifa.opposite = ibrd; |
52a43ae3 | 706 | ifa.flags |= IA_PEER; |
f515e229 OZ |
707 | } |
708 | else | |
709 | { | |
710 | ifa.prefix = ifa.ip; | |
711 | ifa.flags |= IA_HOST; | |
afa9f66c OZ |
712 | } |
713 | ||
b1a1faba OF |
714 | if (new) |
715 | ifa_update(&ifa); | |
716 | else | |
717 | ifa_delete(&ifa); | |
3216eb03 OZ |
718 | |
719 | if (!scan) | |
720 | if_end_partial_update(iface); | |
b1a1faba OF |
721 | } |
722 | ||
c01a9466 | 723 | static void |
b1a1faba OF |
724 | krt_read_msg(struct proto *p, struct ks_msg *msg, int scan) |
725 | { | |
c01a9466 OZ |
726 | /* p is NULL iff KRT_SHARED_SOCKET and !scan */ |
727 | ||
b1a1faba OF |
728 | switch (msg->rtm.rtm_type) |
729 | { | |
730 | case RTM_GET: | |
731 | if(!scan) return; | |
732 | case RTM_ADD: | |
733 | case RTM_DELETE: | |
90097f4f | 734 | case RTM_CHANGE: |
c01a9466 | 735 | krt_read_route(msg, (struct krt_proto *)p, scan); |
b1a1faba | 736 | break; |
09686693 OZ |
737 | case RTM_IFANNOUNCE: |
738 | krt_read_ifannounce(msg); | |
739 | break; | |
b1a1faba | 740 | case RTM_IFINFO: |
3216eb03 | 741 | krt_read_ifinfo(msg, scan); |
b1a1faba OF |
742 | break; |
743 | case RTM_NEWADDR: | |
744 | case RTM_DELADDR: | |
3216eb03 | 745 | krt_read_addr(msg, scan); |
b1a1faba | 746 | break; |
b1a1faba | 747 | default: |
b1a1faba OF |
748 | break; |
749 | } | |
750 | } | |
751 | ||
c01a9466 OZ |
752 | |
753 | /* Sysctl based scans */ | |
754 | ||
755 | static byte *krt_buffer; | |
756 | static size_t krt_buflen, krt_bufmin; | |
757 | static struct proto *krt_buffer_owner; | |
758 | ||
759 | static byte * | |
760 | krt_buffer_update(struct proto *p, size_t *needed) | |
761 | { | |
762 | size_t req = *needed; | |
763 | ||
764 | if ((req > krt_buflen) || | |
765 | ((p == krt_buffer_owner) && (req < krt_bufmin))) | |
766 | { | |
767 | /* min buflen is 32 kB, step is 8 kB, or 128 kB if > 1 MB */ | |
768 | size_t step = (req < 0x100000) ? 0x2000 : 0x20000; | |
769 | krt_buflen = (req < 0x6000) ? 0x8000 : (req + step); | |
770 | krt_bufmin = (req < 0x8000) ? 0 : (req - 2*step); | |
771 | ||
772 | if (krt_buffer) | |
773 | mb_free(krt_buffer); | |
774 | krt_buffer = mb_alloc(krt_pool, krt_buflen); | |
775 | krt_buffer_owner = p; | |
776 | } | |
777 | ||
778 | *needed = krt_buflen; | |
779 | return krt_buffer; | |
780 | } | |
781 | ||
282997f2 | 782 | static void |
c01a9466 | 783 | krt_buffer_release(struct proto *p) |
b1a1faba | 784 | { |
c01a9466 OZ |
785 | if (p == krt_buffer_owner) |
786 | { | |
787 | mb_free(krt_buffer); | |
788 | krt_buffer = NULL; | |
789 | krt_buflen = 0; | |
790 | krt_buffer_owner = 0; | |
791 | } | |
792 | } | |
793 | ||
282997f2 | 794 | static void |
c01a9466 | 795 | krt_sysctl_scan(struct proto *p, int cmd, int table_id) |
b1a1faba | 796 | { |
c01a9466 OZ |
797 | byte *buf, *next; |
798 | int mib[7], mcnt; | |
799 | size_t needed; | |
b1a1faba | 800 | struct ks_msg *m; |
4aef102b | 801 | int retries = 3; |
c01a9466 | 802 | int rv; |
b1a1faba OF |
803 | |
804 | mib[0] = CTL_NET; | |
805 | mib[1] = PF_ROUTE; | |
806 | mib[2] = 0; | |
05476c4d | 807 | mib[3] = BIRD_AF; |
b1a1faba OF |
808 | mib[4] = cmd; |
809 | mib[5] = 0; | |
c01a9466 | 810 | mcnt = 6; |
b1a1faba | 811 | |
c01a9466 OZ |
812 | #ifdef KRT_USE_SYSCTL_7 |
813 | if (table_id >= 0) | |
814 | { | |
815 | mib[6] = table_id; | |
816 | mcnt = 7; | |
817 | } | |
818 | #endif | |
b1a1faba | 819 | |
c01a9466 OZ |
820 | #ifdef KRT_USE_SETFIB_SCAN |
821 | if (table_id > 0) | |
822 | if (setfib(table_id) < 0) | |
823 | { | |
824 | log(L_ERR "KRT: setfib(%d) failed: %m", table_id); | |
825 | return; | |
826 | } | |
827 | #endif | |
b1a1faba | 828 | |
c01a9466 OZ |
829 | try: |
830 | rv = sysctl(mib, mcnt, NULL, &needed, NULL, 0); | |
831 | if (rv < 0) | |
b1a1faba | 832 | { |
c01a9466 OZ |
833 | /* OpenBSD returns EINVAL for not yet used tables */ |
834 | if ((errno == EINVAL) && (table_id > 0)) | |
835 | goto exit; | |
836 | ||
837 | log(L_ERR "KRT: Route scan estimate failed: %m"); | |
838 | goto exit; | |
b1a1faba OF |
839 | } |
840 | ||
c01a9466 OZ |
841 | /* The table is empty */ |
842 | if (needed == 0) | |
843 | goto exit; | |
844 | ||
845 | buf = krt_buffer_update(p, &needed); | |
846 | ||
847 | rv = sysctl(mib, mcnt, buf, &needed, NULL, 0); | |
848 | if (rv < 0) | |
b1a1faba | 849 | { |
c01a9466 OZ |
850 | /* The buffer size changed since last sysctl ('needed' is not changed) */ |
851 | if ((errno == ENOMEM) && retries--) | |
852 | goto try; | |
4aef102b | 853 | |
c01a9466 OZ |
854 | log(L_ERR "KRT: Route scan failed: %m"); |
855 | goto exit; | |
b1a1faba OF |
856 | } |
857 | ||
c01a9466 OZ |
858 | #ifdef KRT_USE_SETFIB_SCAN |
859 | if (table_id > 0) | |
860 | if (setfib(0) < 0) | |
861 | die("KRT: setfib(%d) failed: %m", 0); | |
862 | #endif | |
863 | ||
864 | /* Process received messages */ | |
865 | for (next = buf; next < (buf + needed); next += m->rtm.rtm_msglen) | |
b1a1faba OF |
866 | { |
867 | m = (struct ks_msg *)next; | |
868 | krt_read_msg(p, m, 1); | |
869 | } | |
b1a1faba | 870 | |
c01a9466 OZ |
871 | return; |
872 | ||
873 | exit: | |
874 | krt_buffer_release(p); | |
875 | ||
876 | #ifdef KRT_USE_SETFIB_SCAN | |
877 | if (table_id > 0) | |
878 | if (setfib(0) < 0) | |
879 | die("KRT: setfib(%d) failed: %m", 0); | |
880 | #endif | |
881 | } | |
ff2857b0 | 882 | |
b1a1faba | 883 | void |
396dfa90 | 884 | krt_do_scan(struct krt_proto *p) |
b1a1faba | 885 | { |
c01a9466 | 886 | krt_sysctl_scan(&p->p, NET_RT_DUMP, KRT_CF->sys.table_id); |
b1a1faba OF |
887 | } |
888 | ||
889 | void | |
396dfa90 | 890 | kif_do_scan(struct kif_proto *p) |
b1a1faba | 891 | { |
b1a1faba | 892 | if_start_update(); |
c01a9466 | 893 | krt_sysctl_scan(&p->p, NET_RT_IFLIST, -1); |
b1a1faba OF |
894 | if_end_update(); |
895 | } | |
896 | ||
c01a9466 OZ |
897 | |
898 | /* Kernel sockets */ | |
899 | ||
396dfa90 OZ |
900 | static int |
901 | krt_sock_hook(sock *sk, int size UNUSED) | |
902 | { | |
903 | struct ks_msg msg; | |
904 | int l = read(sk->fd, (char *)&msg, sizeof(msg)); | |
905 | ||
c01a9466 | 906 | if (l <= 0) |
396dfa90 OZ |
907 | log(L_ERR "krt-sock: read failed"); |
908 | else | |
c01a9466 | 909 | krt_read_msg((struct proto *) sk->data, &msg, 0); |
396dfa90 OZ |
910 | |
911 | return 0; | |
912 | } | |
b1a1faba | 913 | |
c01a9466 OZ |
914 | static sock * |
915 | krt_sock_open(pool *pool, void *data, int table_id) | |
916 | { | |
917 | sock *sk; | |
918 | int fd; | |
919 | ||
920 | fd = socket(PF_ROUTE, SOCK_RAW, AF_UNSPEC); | |
921 | if (fd < 0) | |
922 | die("Cannot open kernel socket for routes"); | |
923 | ||
924 | #ifdef KRT_USE_SETFIB_SOCK | |
925 | if (table_id > 0) | |
926 | { | |
927 | if (setsockopt(fd, SOL_SOCKET, SO_SETFIB, &table_id, sizeof(table_id)) < 0) | |
928 | die("Cannot set FIB %d for kernel socket: %m", table_id); | |
929 | } | |
930 | #endif | |
931 | ||
932 | sk = sk_new(pool); | |
933 | sk->type = SK_MAGIC; | |
934 | sk->rx_hook = krt_sock_hook; | |
935 | sk->fd = fd; | |
936 | sk->data = data; | |
937 | ||
938 | if (sk_open(sk) < 0) | |
939 | bug("krt-sock: sk_open failed"); | |
940 | ||
941 | return sk; | |
942 | } | |
943 | ||
944 | ||
945 | #ifdef KRT_SHARED_SOCKET | |
946 | ||
947 | static sock *krt_sock; | |
948 | static int krt_sock_count; | |
949 | ||
950 | ||
951 | static void | |
952 | krt_sock_open_shared(void) | |
953 | { | |
954 | if (!krt_sock_count) | |
955 | krt_sock = krt_sock_open(krt_pool, NULL, -1); | |
956 | ||
957 | krt_sock_count++; | |
958 | } | |
959 | ||
960 | static void | |
961 | krt_sock_close_shared(void) | |
962 | { | |
963 | krt_sock_count--; | |
964 | ||
965 | if (!krt_sock_count) | |
966 | { | |
967 | rfree(krt_sock); | |
968 | krt_sock = NULL; | |
969 | } | |
970 | } | |
971 | ||
9ddbfbdd | 972 | int |
c01a9466 | 973 | krt_sys_start(struct krt_proto *p) |
b1a1faba | 974 | { |
c01a9466 | 975 | krt_table_map[KRT_CF->sys.table_id] = p; |
396dfa90 | 976 | |
c01a9466 OZ |
977 | krt_sock_open_shared(); |
978 | p->sys.sk = krt_sock; | |
9ddbfbdd JMM |
979 | |
980 | return 1; | |
c01a9466 | 981 | } |
396dfa90 | 982 | |
c01a9466 OZ |
983 | void |
984 | krt_sys_shutdown(struct krt_proto *p) | |
985 | { | |
986 | krt_sock_close_shared(); | |
987 | p->sys.sk = NULL; | |
396dfa90 | 988 | |
c01a9466 | 989 | krt_table_map[KRT_CF->sys.table_id] = NULL; |
396dfa90 | 990 | |
c01a9466 OZ |
991 | krt_buffer_release(&p->p); |
992 | } | |
396dfa90 | 993 | |
c01a9466 OZ |
994 | #else |
995 | ||
9ddbfbdd | 996 | int |
c01a9466 OZ |
997 | krt_sys_start(struct krt_proto *p) |
998 | { | |
999 | p->sys.sk = krt_sock_open(p->p.pool, p, KRT_CF->sys.table_id); | |
9ddbfbdd | 1000 | return 1; |
b1a1faba OF |
1001 | } |
1002 | ||
1003 | void | |
c01a9466 | 1004 | krt_sys_shutdown(struct krt_proto *p) |
b1a1faba | 1005 | { |
c01a9466 OZ |
1006 | rfree(p->sys.sk); |
1007 | p->sys.sk = NULL; | |
a209d5d8 | 1008 | |
c01a9466 | 1009 | krt_buffer_release(&p->p); |
ff2857b0 | 1010 | } |
b1a1faba | 1011 | |
c01a9466 OZ |
1012 | #endif /* KRT_SHARED_SOCKET */ |
1013 | ||
a209d5d8 | 1014 | |
c01a9466 OZ |
1015 | /* KRT configuration callbacks */ |
1016 | ||
1017 | static u32 krt_table_cf[(KRT_MAX_TABLES+31) / 32]; | |
1018 | ||
1019 | int | |
1020 | krt_sys_reconfigure(struct krt_proto *p UNUSED, struct krt_config *n, struct krt_config *o) | |
1021 | { | |
1022 | return n->sys.table_id == o->sys.table_id; | |
ff2857b0 | 1023 | } |
b1a1faba OF |
1024 | |
1025 | void | |
c01a9466 | 1026 | krt_sys_preconfig(struct config *c UNUSED) |
b1a1faba | 1027 | { |
c01a9466 OZ |
1028 | krt_max_tables = krt_get_max_tables(); |
1029 | bzero(&krt_table_cf, sizeof(krt_table_cf)); | |
b1a1faba OF |
1030 | } |
1031 | ||
1032 | void | |
c01a9466 | 1033 | krt_sys_postconfig(struct krt_config *x) |
b1a1faba | 1034 | { |
c01a9466 OZ |
1035 | u32 *tbl = krt_table_cf; |
1036 | int id = x->sys.table_id; | |
1037 | ||
1038 | if (tbl[id/32] & (1 << (id%32))) | |
1039 | cf_error("Multiple kernel syncers defined for table #%d", id); | |
1040 | ||
1041 | tbl[id/32] |= (1 << (id%32)); | |
b1a1faba OF |
1042 | } |
1043 | ||
c01a9466 OZ |
1044 | void krt_sys_init_config(struct krt_config *c) |
1045 | { | |
1046 | c->sys.table_id = 0; /* Default table */ | |
1047 | } | |
a209d5d8 | 1048 | |
c01a9466 OZ |
1049 | void krt_sys_copy_config(struct krt_config *d, struct krt_config *s) |
1050 | { | |
1051 | d->sys.table_id = s->sys.table_id; | |
1052 | } | |
1053 | ||
1054 | ||
1055 | /* KIF misc code */ | |
1056 | ||
b1a1faba | 1057 | void |
c01a9466 | 1058 | kif_sys_start(struct kif_proto *p UNUSED) |
b1a1faba | 1059 | { |
c01a9466 | 1060 | } |
a209d5d8 | 1061 | |
c01a9466 OZ |
1062 | void |
1063 | kif_sys_shutdown(struct kif_proto *p) | |
1064 | { | |
1065 | krt_buffer_release(&p->p); | |
b1a1faba OF |
1066 | } |
1067 | ||
e237b28a OZ |
1068 | |
1069 | struct ifa * | |
1070 | kif_get_primary_ip(struct iface *i) | |
1071 | { | |
1072 | #ifndef IPV6 | |
1073 | static int fd = -1; | |
1074 | ||
1075 | if (fd < 0) | |
1076 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
1077 | ||
1078 | struct ifreq ifr; | |
1079 | memset(&ifr, 0, sizeof(ifr)); | |
1080 | strncpy(ifr.ifr_name, i->name, IFNAMSIZ); | |
1081 | ||
1082 | int rv = ioctl(fd, SIOCGIFADDR, (char *) &ifr); | |
1083 | if (rv < 0) | |
1084 | return NULL; | |
1085 | ||
1086 | ip_addr addr; | |
1087 | struct sockaddr_in *sin = (struct sockaddr_in *) &ifr.ifr_addr; | |
1088 | memcpy(&addr, &sin->sin_addr.s_addr, sizeof(ip_addr)); | |
1089 | ipa_ntoh(addr); | |
1090 | ||
1091 | struct ifa *a; | |
1092 | WALK_LIST(a, i->addrs) | |
1093 | { | |
1094 | if (ipa_equal(a->ip, addr)) | |
1095 | return a; | |
1096 | } | |
1097 | #endif | |
1098 | ||
1099 | return NULL; | |
1100 | } |