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b1a1faba OF |
1 | /* |
2 | * BIRD -- Unix Routing Table Syncing | |
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> | |
10 | #include <ctype.h> | |
11 | #include <fcntl.h> | |
12 | #include <unistd.h> | |
13 | #include <sys/param.h> | |
14 | #include <sys/types.h> | |
15 | #include <sys/socket.h> | |
16 | #include <sys/sysctl.h> | |
17 | #include <sys/ioctl.h> | |
18 | #include <netinet/in.h> | |
19 | #include <net/route.h> | |
20 | #include <net/if.h> | |
21 | #include <net/if_dl.h> | |
22 | ||
23 | #undef LOCAL_DEBUG | |
24 | ||
25 | #include "nest/bird.h" | |
26 | #include "nest/iface.h" | |
27 | #include "nest/route.h" | |
28 | #include "nest/protocol.h" | |
29 | #include "nest/iface.h" | |
30 | #include "lib/timer.h" | |
31 | #include "lib/unix.h" | |
32 | #include "lib/krt.h" | |
33 | #include "lib/string.h" | |
34 | #include "lib/socket.h" | |
35 | ||
36 | #ifdef IPV6 | |
37 | #define HOST_MASK 128 | |
38 | #else | |
39 | #define HOST_MASK 32 | |
40 | #endif | |
41 | ||
42 | int rt_sock = 0; | |
43 | ||
44 | #define CHECK_FAMILY(sa) \ | |
45 | ((((struct sockaddr *)sa)->sa_family) == BIRD_AF) | |
46 | ||
47 | struct iface * | |
48 | krt_temp_iface_index(struct krt_proto *p, unsigned index) | |
49 | { | |
50 | struct iface *i, *j; | |
51 | ||
52 | WALK_LIST(i, p->scan.temp_ifs) | |
53 | if (i->index == index) | |
54 | return i; | |
55 | i = mb_allocz(p->p.pool, sizeof(struct iface)); | |
56 | if (j = if_find_by_index(index)) | |
57 | { | |
58 | strcpy(i->name, j->name); | |
59 | i->addr = j->addr; | |
60 | } | |
61 | else | |
62 | strcpy(i->name, "?"); | |
63 | i->index = index; | |
64 | add_tail(&p->scan.temp_ifs, &i->n); | |
65 | return i; | |
66 | } | |
67 | ||
68 | ||
69 | int | |
70 | krt_capable(rte *e) | |
71 | { | |
72 | rta *a = e->attrs; | |
73 | ||
74 | #ifdef CONFIG_AUTO_ROUTES | |
75 | if (a->source == RTS_DEVICE) | |
76 | return 0; | |
77 | #endif | |
78 | return | |
79 | a->cast == RTC_UNICAST && | |
80 | (a->dest == RTD_ROUTER | |
81 | || a->dest == RTD_DEVICE | |
82 | #ifdef RTF_REJECT | |
83 | || a->dest == RTD_UNREACHABLE | |
84 | #endif | |
85 | #ifdef RTF_BLACKHOLE | |
86 | || a->dest == RTD_BLACKHOLE /* FIXME Prohibited? */ | |
87 | #endif | |
88 | ); | |
89 | } | |
90 | ||
91 | #define ROUNDUP(a) \ | |
92 | ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) | |
93 | ||
94 | #define NEXTADDR(w, u) \ | |
95 | if (msg.rtm.rtm_addrs & (w)) {\ | |
96 | l = ROUNDUP(((struct sockaddr *)&(u))->sa_len);\ | |
97 | memmove(body, &(u), l); body += l;} | |
98 | ||
99 | static void | |
100 | krt_sock_send(int cmd, rte *e, char *name) | |
101 | { | |
102 | net *net = e->net; | |
103 | rta *a = e->attrs; | |
104 | static int msg_seq; | |
105 | struct iface *j, *i = a->iface; | |
106 | int l; | |
107 | struct ks_msg msg; | |
108 | char *body = (char *)msg.buf; | |
109 | sockaddr gate, mask, dst; | |
110 | ||
111 | log("KRT sock send: %I/%d via %I", net->n.prefix, net->n.pxlen, a->gw); | |
112 | ||
113 | fill_in_sockaddr(&dst, net->n.prefix, 0); | |
114 | fill_in_sockaddr(&mask, ipa_mkmask(net->n.pxlen), 0); | |
115 | fill_in_sockaddr(&gate, a->gw, 0); | |
116 | ||
117 | memset (&msg, 0, sizeof (struct rt_msghdr)); | |
118 | msg.rtm.rtm_version = RTM_VERSION; | |
119 | msg.rtm.rtm_type = cmd; | |
120 | msg.rtm.rtm_seq = msg_seq++; | |
121 | msg.rtm.rtm_addrs = RTA_DST; | |
122 | msg.rtm.rtm_flags = RTF_UP; | |
123 | ||
124 | if (net->n.pxlen == HOST_MASK) | |
125 | { | |
126 | msg.rtm.rtm_flags |= RTF_HOST; | |
127 | } | |
128 | else | |
129 | { | |
130 | msg.rtm.rtm_addrs |= RTA_NETMASK; | |
131 | } | |
132 | ||
133 | #ifdef RTF_REJECT | |
134 | if(a->dest == RTD_UNREACHABLE) | |
135 | msg.rtm.rtm_flags |= RTF_REJECT; | |
136 | #endif | |
137 | #ifdef RTF_BLACKHOLE | |
138 | if(a->dest == RTD_BLACKHOLE) | |
139 | msg.rtm.rtm_flags |= RTF_BLACKHOLE; | |
140 | #endif | |
141 | ||
142 | /* This is really very nasty, but I'm not able | |
143 | * to add "(reject|blackhole)" route without | |
144 | * gateway set | |
145 | */ | |
146 | if(!i) | |
147 | { | |
148 | i = HEAD(iface_list); | |
149 | ||
150 | WALK_LIST(j, iface_list) | |
151 | { | |
152 | if (j->flags & IF_LOOPBACK) | |
153 | { | |
154 | i = j; | |
155 | break; | |
156 | } | |
157 | } | |
158 | } | |
159 | ||
160 | switch (a->dest) | |
161 | { | |
162 | case RTD_ROUTER: | |
163 | msg.rtm.rtm_flags |= RTF_GATEWAY; | |
164 | msg.rtm.rtm_addrs |= RTA_GATEWAY; | |
165 | break; | |
166 | #ifdef RTF_REJECT | |
167 | case RTD_UNREACHABLE: | |
168 | #endif | |
169 | #ifdef RTF_BLACKHOLE | |
170 | case RTD_BLACKHOLE: | |
171 | #endif | |
172 | case RTD_DEVICE: | |
173 | if(i) | |
174 | { | |
175 | if (cmd == RTM_ADD && (i->flags & IF_MULTIACCESS) != IF_MULTIACCESS) /* PTP */ | |
176 | msg.rtm.rtm_flags |= RTF_CLONING; | |
177 | ||
178 | if(!i->addr) { | |
179 | log(L_ERR "KIF: interface \"%s\" has no IP addess", i->name); | |
180 | return; | |
181 | } | |
182 | ||
183 | fill_in_sockaddr(&gate, i->addr->ip, 0); | |
184 | msg.rtm.rtm_addrs |= RTA_GATEWAY; | |
185 | } | |
186 | else | |
187 | { | |
188 | bug("krt-sock: interface route %I/%d without interface", net->n.prefix, net->n.pxlen); | |
189 | } | |
190 | break; | |
191 | default: | |
192 | bug("krt-sock: unknown flags, but not filtered"); | |
193 | } | |
194 | ||
195 | if(i) msg.rtm.rtm_index = i->index; | |
196 | ||
197 | NEXTADDR(RTA_DST, dst); | |
198 | NEXTADDR(RTA_GATEWAY, gate); | |
199 | NEXTADDR(RTA_NETMASK, mask); | |
200 | ||
201 | l = body - (char *)&msg; | |
202 | msg.rtm.rtm_msglen = l; | |
203 | ||
204 | if ((l = write(rt_sock, (char *)&msg, l)) < 0) { | |
205 | log(L_ERR "KIF: error writting route to socket (%I/%d)", net->n.prefix, net->n.pxlen); | |
206 | } | |
207 | } | |
208 | ||
209 | void | |
210 | krt_set_notify(struct krt_proto *p, net *net, rte *new, rte *old) | |
211 | { | |
212 | if (old) | |
213 | { | |
214 | DBG("krt_remove_route(%I/%d)\n", net->n.prefix, net->n.pxlen); | |
215 | krt_sock_send(RTM_DELETE, old, "RTM_DELETE"); | |
216 | ||
217 | } | |
218 | if (new) | |
219 | { | |
220 | DBG("krt_add_route(%I/%d)\n", net->n.prefix, net->n.pxlen); | |
221 | krt_sock_send(RTM_ADD, new, "RTM_ADD"); | |
222 | } | |
223 | } | |
224 | ||
225 | void | |
226 | krt_set_start(struct krt_proto *x, int first) | |
227 | { | |
228 | sock *sk_rt; | |
229 | static int ks_open_tried = 0; | |
230 | ||
231 | if (ks_open_tried) | |
232 | return; | |
233 | ||
234 | ks_open_tried = 1; | |
235 | ||
236 | DBG("KRT: Opening kernel socket\n"); | |
237 | ||
238 | if( (rt_sock = socket(PF_ROUTE, SOCK_RAW, AF_UNSPEC)) < 0) | |
239 | die("Cannot open kernel socket for routes"); | |
240 | ||
241 | sk_rt = sk_new(krt_pool); | |
242 | sk_rt->type = SK_MAGIC; | |
243 | sk_rt->rx_hook = krt_set_hook; | |
244 | sk_rt->fd = rt_sock; | |
245 | sk_rt->data = x; | |
246 | if (sk_open(sk_rt)) | |
247 | bug("Krt_sock: sk_rt_open failed"); | |
248 | } | |
249 | ||
250 | static int | |
251 | krt_set_hook(sock *sk, int size) | |
252 | { | |
253 | int l; | |
254 | struct ks_msg msg; | |
255 | ||
256 | l = read(sk->fd, (char *)&msg, sizeof(msg)); | |
257 | ||
258 | krt_read_msg((struct proto *)sk->data, &msg, 0); | |
259 | return 0; | |
260 | } | |
261 | ||
262 | void | |
263 | krt_read_rt(struct ks_msg *msg, struct krt_proto *p, int scan) | |
264 | { | |
265 | sockaddr gate, mask, dst; | |
266 | rta a; | |
267 | rte *e; | |
268 | net *net; | |
269 | u32 oif; | |
270 | ip_addr idst, igate, imask; | |
271 | void *body = (char *)msg->buf; | |
272 | int new = (msg->rtm.rtm_type == RTM_ADD); | |
273 | int src; | |
274 | int flags = msg->rtm.rtm_flags; | |
275 | int addrs = msg->rtm.rtm_addrs; | |
276 | int masklen = -1; | |
277 | ||
278 | if (!(flags & RTF_UP)) | |
279 | { | |
280 | DBG("Down.\n"); | |
281 | return; | |
282 | } | |
283 | ||
284 | if (flags & RTF_HOST) | |
285 | masklen = HOST_MASK; | |
286 | ||
287 | if(!CHECK_FAMILY(body)) return; | |
288 | ||
289 | if(msg->rtm.rtm_flags & RTF_LLINFO) return; /* ARPs etc. */ | |
290 | ||
291 | #define GETADDR(p, F) \ | |
292 | memset(p, 0, sizeof(*p));\ | |
293 | if ((addrs & (F)) && ((struct sockaddr *)body)->sa_len) {\ | |
294 | unsigned int l = ROUNDUP(((struct sockaddr *)body)->sa_len);\ | |
295 | memcpy(p, body, (l > sizeof(*p) ? sizeof(*p) : l));\ | |
296 | body += l;} | |
297 | ||
298 | GETADDR (&dst, RTA_DST); | |
299 | GETADDR (&gate, RTA_GATEWAY); | |
300 | GETADDR (&mask, RTA_NETMASK); | |
301 | ||
302 | idst = IPA_NONE; | |
303 | igate = IPA_NONE; | |
304 | imask = IPA_NONE; | |
305 | ||
306 | get_sockaddr(&dst, &idst, NULL, 0); | |
307 | if(CHECK_FAMILY(&gate)) get_sockaddr(&gate, &igate, NULL, 0); | |
308 | get_sockaddr(&mask, &imask, NULL, 0); | |
309 | ||
310 | if (masklen < 0) masklen = ipa_mklen(imask); | |
311 | ||
312 | if (flags & (RTF_DYNAMIC | RTF_MODIFIED)) | |
313 | { | |
314 | log(L_WARN "krt: Ignoring redirect to %I/%d via %I", idst, masklen, igate); | |
315 | return; | |
316 | } | |
317 | ||
318 | if (masklen < 0) | |
319 | { | |
320 | log(L_WARN "krt: Got invalid route from kernel!"); | |
321 | return; | |
322 | } | |
323 | ||
324 | net = net_get(p->p.table, idst, masklen); | |
325 | ||
326 | memset(&a, 0, sizeof(a)); | |
327 | ||
328 | a.proto = &p->p; | |
329 | a.source = RTS_INHERIT; | |
330 | a.scope = SCOPE_UNIVERSE; | |
331 | a.cast = RTC_UNICAST; | |
332 | a.flags = a.aflags = 0; | |
333 | a.from = IPA_NONE; | |
334 | a.gw = IPA_NONE; | |
335 | a.iface = NULL; | |
336 | a.eattrs = NULL; | |
337 | ||
338 | a.dest = RTD_NONE; | |
339 | ||
340 | ||
341 | if (flags & RTF_GATEWAY) | |
342 | { | |
343 | neighbor *ng = neigh_find(&p->p, &igate, 0); | |
344 | if (ng && ng->scope) | |
345 | a.iface = ng->iface; | |
346 | else | |
347 | log(L_WARN "Kernel told us to use non-neighbor %I for %I/%d", igate, net->n.prefix, net->n.pxlen); | |
348 | ||
349 | a.dest = RTD_ROUTER; | |
350 | a.gw = igate; | |
351 | } | |
352 | else | |
353 | { | |
354 | a.dest = RTD_DEVICE; | |
355 | a.gw = IPA_NONE; | |
356 | a.iface = krt_temp_iface_index(p, msg->rtm.rtm_index); | |
357 | } | |
358 | ||
359 | #ifdef RTF_REJECT | |
360 | if(flags & RTF_REJECT) { | |
361 | a.dest = RTD_UNREACHABLE; | |
362 | a.gw = IPA_NONE; | |
363 | } | |
364 | #endif | |
365 | ||
366 | #ifdef RTF_BLACKHOLE | |
367 | if(flags & RTF_BLACKHOLE) { | |
368 | a.dest = RTD_BLACKHOLE; | |
369 | a.gw = IPA_NONE; | |
370 | } | |
371 | #endif | |
372 | ||
373 | if (a.dest == RTD_NONE) | |
374 | { | |
375 | log(L_WARN "Kernel reporting unknown route type to %I/%d", net->n.prefix, net->n.pxlen); | |
376 | return; | |
377 | } | |
378 | ||
379 | src = KRT_SRC_UNKNOWN; /* FIXME */ | |
380 | ||
381 | ||
382 | ||
383 | e = rte_get_temp(&a); | |
384 | e->net = net; | |
385 | e->u.krt.src = src; | |
386 | //e->u.krt.proto = i->rtm_protocol; | |
387 | //e->u.krt.type = i->rtm_type; | |
388 | e->u.krt.metric = 0; | |
389 | ||
390 | if (scan) | |
391 | krt_got_route(p, e); | |
392 | else | |
393 | krt_got_route_async(p, e, new); | |
394 | } | |
395 | ||
396 | void | |
397 | krt_read_ifinfo(struct ks_msg *msg) | |
398 | { | |
399 | struct if_msghdr *ifm = (struct if_msghdr *)&msg->rtm; | |
400 | void *body = (void *)(ifm + 1); | |
401 | struct sockaddr_dl *dl = NULL; | |
402 | unsigned int i; | |
403 | struct iface *iface = NULL, f; | |
404 | char *ifname = "(none)"; | |
405 | int fl = ifm->ifm_flags; | |
406 | ||
407 | for(i = 1; i!=0; i <<= 1) | |
408 | { | |
409 | if((i & ifm->ifm_addrs) && (i == RTA_IFP)) | |
410 | { | |
411 | if( i == RTA_IFP) | |
412 | { | |
413 | dl = (struct sockaddr_dl *)body; | |
414 | break; | |
415 | } | |
416 | body += ROUNDUP(((struct sockaddr *)&(body))->sa_len);\ | |
417 | } | |
418 | } | |
419 | ||
420 | if(dl && (dl->sdl_family != AF_LINK)) | |
421 | { | |
422 | log("Ignoring strange IFINFO"); | |
423 | return; | |
424 | } | |
425 | ||
426 | if(dl) ifname = dl->sdl_data; | |
427 | ||
428 | iface = if_find_by_index(ifm->ifm_index); | |
429 | ||
430 | if(!iface) | |
431 | { | |
432 | /* New interface */ | |
433 | if(!dl) return; /* No interface name, ignoring */ | |
434 | DBG("New interface \"%s\" found", ifname); | |
435 | bzero(&f, sizeof(f)); | |
436 | f.index = ifm->ifm_index; | |
437 | strncpy(f.name, ifname, sizeof(f.name) -1); | |
438 | } | |
439 | else | |
440 | { | |
441 | memcpy(&f, iface, sizeof(struct iface)); | |
442 | } | |
443 | ||
444 | f.mtu = ifm->ifm_data.ifi_mtu; | |
445 | f.flags = 0; | |
446 | ||
447 | if (fl & IFF_UP) | |
448 | { | |
449 | //f.flags |= IF_UP; /* FIXME */ | |
450 | f.flags |= IF_LINK_UP; | |
451 | } | |
452 | if (fl & IFF_LOOPBACK) /* Loopback */ | |
453 | f.flags |= IF_MULTIACCESS | IF_LOOPBACK | IF_IGNORE; | |
454 | else if (fl & IFF_POINTOPOINT) /* PtP */ | |
455 | f.flags |= IF_MULTICAST; | |
456 | else if (fl & IFF_BROADCAST) /* Broadcast */ | |
457 | f.flags |= IF_MULTIACCESS | IF_BROADCAST | IF_MULTICAST; | |
458 | else | |
459 | f.flags |= IF_MULTIACCESS; /* NBMA */ | |
460 | ||
461 | if((!iface) || memcmp(&f, iface, sizeof(struct iface))) | |
462 | if_update(&f); /* Just if something happens */ | |
463 | } | |
464 | ||
465 | void | |
466 | krt_read_addr(struct ks_msg *msg) | |
467 | { | |
468 | struct ifa_msghdr *ifam = (struct ifa_msghdr *)&msg->rtm; | |
469 | void *body = (void *)(ifam + 1); | |
470 | sockaddr addr, mask, brd; | |
471 | unsigned int i; | |
472 | struct iface *iface = NULL; | |
473 | struct ifa ifa; | |
474 | struct sockaddr null; | |
475 | ip_addr iaddr, imask, ibrd; | |
476 | int addrs = ifam->ifam_addrs; | |
477 | int scope, masklen = -1; | |
478 | int new = (ifam->ifam_type == RTM_NEWADDR); | |
479 | int fl = ifam->ifam_flags; | |
480 | ||
481 | if(!(iface = if_find_by_index(ifam->ifam_index))) | |
482 | { | |
483 | log(L_ERR "KIF: Received address message for unknown interface %d", ifam->ifam_index); | |
484 | return; | |
485 | } | |
486 | ||
487 | GETADDR (&null, RTA_DST); | |
488 | GETADDR (&null, RTA_GATEWAY); | |
489 | GETADDR (&mask, RTA_NETMASK); | |
490 | GETADDR (&null, RTA_GENMASK); | |
491 | GETADDR (&null, RTA_IFP); | |
492 | GETADDR (&addr, RTA_IFA); | |
493 | GETADDR (&null, RTA_AUTHOR); | |
494 | GETADDR (&brd, RTA_BRD); | |
495 | ||
496 | if(!CHECK_FAMILY(&addr)) return; /* Some other family address */ | |
497 | ||
498 | get_sockaddr(&addr, &iaddr, NULL, 0); | |
499 | get_sockaddr(&mask, &imask, NULL, 0); | |
500 | get_sockaddr(&brd, &ibrd, NULL, 0); | |
501 | ||
502 | if ((masklen = ipa_mklen(imask)) < 0) | |
503 | { | |
504 | log("Invalid masklen"); | |
505 | return; | |
506 | } | |
507 | ||
508 | memset(&ifa, 0, sizeof(ifa)); | |
509 | ||
510 | ifa.iface = iface; | |
511 | ||
512 | memcpy(&ifa.ip, &iaddr, sizeof(ip_addr)); | |
513 | ifa.pxlen = masklen; | |
514 | memcpy(&ifa.brd, &ibrd, sizeof(ip_addr)); | |
515 | ||
516 | scope = ipa_classify(ifa.ip); | |
517 | ||
518 | ifa.prefix = ipa_and(ifa.ip, ipa_mkmask(masklen)); | |
519 | ||
520 | if (scope < 0) | |
521 | { | |
522 | log(L_ERR "KIF: Invalid interface address %I for %s", ifa.ip, iface->name); | |
523 | return; | |
524 | } | |
525 | ifa.scope = scope & IADDR_SCOPE_MASK; | |
526 | ||
527 | if (new) | |
528 | ifa_update(&ifa); | |
529 | else | |
530 | ifa_delete(&ifa); | |
531 | } | |
532 | ||
533 | ||
534 | void | |
535 | krt_read_msg(struct proto *p, struct ks_msg *msg, int scan) | |
536 | { | |
537 | switch (msg->rtm.rtm_type) | |
538 | { | |
539 | case RTM_GET: | |
540 | if(!scan) return; | |
541 | case RTM_ADD: | |
542 | case RTM_DELETE: | |
543 | //log("KRT_ADD/DELETE"); | |
544 | krt_read_rt(msg, (struct krt_proto *)p, scan); | |
545 | break; | |
546 | case RTM_IFINFO: | |
547 | //log("KRT_IFINFO"); | |
548 | krt_read_ifinfo(msg); | |
549 | break; | |
550 | case RTM_NEWADDR: | |
551 | case RTM_DELADDR: | |
552 | //log("KRT_NEWADDR/DELADDR"); | |
553 | krt_read_addr(msg); | |
554 | break; | |
555 | #ifdef RTM_IFANNOUNCE | |
556 | case RTM_IFANNOUNCE: | |
557 | log("KRT_IFANNOUNCE"); | |
558 | //ifan_read (&buf.ian.ifan); | |
559 | break; | |
560 | #endif /* RTM_IFANNOUNCE */ | |
561 | default: | |
562 | log("Unprocessed RTM_type: %d", msg->rtm.rtm_type); | |
563 | break; | |
564 | } | |
565 | } | |
566 | ||
567 | ||
568 | struct iface * | |
569 | krt_temp_iface(struct krt_proto *p, char *name) | |
570 | { | |
571 | struct iface *i; | |
572 | ||
573 | WALK_LIST(i, p->scan.temp_ifs) | |
574 | if (!strcmp(i->name, name)) | |
575 | return i; | |
576 | i = mb_allocz(p->p.pool, sizeof(struct iface)); | |
577 | strcpy(i->name, name); | |
578 | add_tail(&p->scan.temp_ifs, &i->n); | |
579 | return i; | |
580 | } | |
581 | ||
582 | ||
583 | void | |
584 | krt_scan_construct(struct krt_config *c) | |
585 | { | |
586 | } | |
587 | ||
588 | void | |
589 | krt_scan_preconfig(struct config *c) | |
590 | { | |
591 | } | |
592 | ||
593 | void | |
594 | krt_scan_postconfig(struct krt_config *c) | |
595 | { | |
596 | } | |
597 | ||
598 | void | |
599 | krt_scan_start(struct krt_proto *x, int first) | |
600 | { | |
601 | init_list(&x->scan.temp_ifs); | |
602 | } | |
603 | ||
604 | void | |
605 | krt_scan_shutdown(struct krt_proto *x, int last) | |
606 | { | |
607 | } | |
608 | ||
609 | void | |
610 | krt_sysctl_scan(struct proto *p, pool *pool, byte **buf, int *bl, int cmd) | |
611 | { | |
612 | byte *next; | |
613 | int obl, needed, mib[6], on; | |
614 | struct ks_msg *m; | |
615 | ||
616 | mib[0] = CTL_NET; | |
617 | mib[1] = PF_ROUTE; | |
618 | mib[2] = 0; | |
619 | mib[3] = BIRD_PF; | |
620 | mib[4] = cmd; | |
621 | mib[5] = 0; | |
622 | ||
623 | if( sysctl(mib, 6 , NULL , &needed, NULL, 0) < 0) | |
624 | { | |
625 | die("RT scan..."); | |
626 | } | |
627 | ||
628 | obl = *bl; | |
629 | ||
630 | while(needed > *bl) *bl *= 2; | |
631 | while(needed < (*bl/2)) *bl /= 2; | |
632 | ||
633 | if( (obl!=*bl) || !*buf) | |
634 | { | |
635 | if(*buf) mb_free(*buf); | |
636 | if( (*buf = mb_alloc(pool, *bl)) == NULL ) die("RT scan buf alloc"); | |
637 | } | |
638 | ||
639 | on = needed; | |
640 | ||
641 | if( sysctl(mib, 6 , *buf, &needed, NULL, 0) < 0) | |
642 | { | |
643 | if(on != needed) return; /* The buffer size changed since last sysctl */ | |
644 | die("RT scan 2"); | |
645 | } | |
646 | ||
647 | for (next = *buf; next < (*buf + needed); next += m->rtm.rtm_msglen) | |
648 | { | |
649 | m = (struct ks_msg *)next; | |
650 | krt_read_msg(p, m, 1); | |
651 | } | |
652 | } | |
653 | ||
654 | void | |
655 | krt_scan_fire(struct krt_proto *p) | |
656 | { | |
657 | static byte *buf = NULL; | |
658 | static int bl = 32768; | |
659 | krt_sysctl_scan((struct proto *)p , p->krt_pool, &buf, &bl, NET_RT_DUMP); | |
660 | } | |
661 | ||
662 | void | |
663 | krt_if_scan(struct kif_proto *p) | |
664 | { | |
665 | static byte *buf = NULL; | |
666 | static int bl = 4096; | |
667 | struct proto *P = (struct proto *)p; | |
668 | if_start_update(); | |
669 | krt_sysctl_scan(P, P->pool, &buf, &bl, NET_RT_IFLIST); | |
670 | if_end_update(); | |
671 | } | |
672 | ||
673 | ||
674 | void | |
675 | krt_set_construct(struct krt_config *c) | |
676 | { | |
677 | } | |
678 | ||
679 | void | |
680 | krt_set_shutdown(struct krt_proto *x, int last) | |
681 | { | |
682 | } | |
683 | ||
684 | void | |
685 | krt_if_io_init(void) | |
686 | { | |
687 | } | |
688 | ||
689 | void | |
690 | krt_if_construct(struct kif_config *c) | |
691 | { | |
692 | } | |
693 | ||
694 | void | |
695 | krt_if_start(struct kif_proto *p) | |
696 | { | |
697 | } | |
698 | ||
699 | void | |
700 | krt_if_shutdown(struct kif_proto *p) | |
701 | { | |
702 | } | |
703 |