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1 | /* Zebra's client library. | |
2 | * Copyright (C) 1999 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published | |
8 | * by the Free Software Foundation; either version 2, or (at your | |
9 | * option) any later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GNU Zebra; see the file COPYING. If not, write to the | |
18 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
19 | * MA 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | #include <zebra.h> | |
23 | ||
24 | #include "prefix.h" | |
25 | #include "stream.h" | |
26 | #include "network.h" | |
27 | #include "if.h" | |
28 | #include "log.h" | |
29 | #include "thread.h" | |
30 | #include "zclient.h" | |
31 | #include "memory.h" | |
32 | #include "table.h" | |
33 | ||
34 | #include "zebra/rib.h" | |
35 | #include "zebra/zserv.h" | |
36 | \f | |
37 | /* Zebra client events. */ | |
38 | enum event {ZCLIENT_SCHEDULE, ZCLIENT_READ, ZCLIENT_CONNECT}; | |
39 | ||
40 | /* Prototype for event manager. */ | |
41 | static void zclient_event (enum event, struct zclient *); | |
42 | ||
43 | /* This file local debug flag. */ | |
44 | int zclient_debug = 0; | |
45 | \f | |
46 | /* Allocate zclient structure. */ | |
47 | struct zclient * | |
48 | zclient_new () | |
49 | { | |
50 | struct zclient *zclient; | |
51 | zclient = XMALLOC (MTYPE_ZCLIENT, sizeof (struct zclient)); | |
52 | memset (zclient, 0, sizeof (struct zclient)); | |
53 | ||
54 | zclient->ibuf = stream_new (ZEBRA_MAX_PACKET_SIZ); | |
55 | zclient->obuf = stream_new (ZEBRA_MAX_PACKET_SIZ); | |
56 | ||
57 | return zclient; | |
58 | } | |
59 | ||
60 | /* Free zclient structure. */ | |
61 | void | |
62 | zclient_free (struct zclient *zclient) | |
63 | { | |
64 | XFREE (MTYPE_ZCLIENT, zclient); | |
65 | } | |
66 | ||
67 | /* Initialize zebra client. Argument redist_default is unwanted | |
68 | redistribute route type. */ | |
69 | void | |
70 | zclient_init (struct zclient *zclient, int redist_default) | |
71 | { | |
72 | int i; | |
73 | ||
74 | /* Enable zebra client connection by default. */ | |
75 | zclient->enable = 1; | |
76 | ||
77 | /* Set -1 to the default socket value. */ | |
78 | zclient->sock = -1; | |
79 | ||
80 | /* Clear redistribution flags. */ | |
81 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
82 | zclient->redist[i] = 0; | |
83 | ||
84 | /* Set unwanted redistribute route. bgpd does not need BGP route | |
85 | redistribution. */ | |
86 | zclient->redist_default = redist_default; | |
87 | zclient->redist[redist_default] = 1; | |
88 | ||
89 | /* Set default-information redistribute to zero. */ | |
90 | zclient->default_information = 0; | |
91 | ||
92 | /* Schedule first zclient connection. */ | |
93 | if (zclient_debug) | |
94 | zlog_info ("zclient start scheduled"); | |
95 | ||
96 | zclient_event (ZCLIENT_SCHEDULE, zclient); | |
97 | } | |
98 | ||
99 | /* Stop zebra client services. */ | |
100 | void | |
101 | zclient_stop (struct zclient *zclient) | |
102 | { | |
103 | if (zclient_debug) | |
104 | zlog_info ("zclient stopped"); | |
105 | ||
106 | /* Stop threads. */ | |
107 | if (zclient->t_read) | |
108 | { | |
109 | thread_cancel (zclient->t_read); | |
110 | zclient->t_read = NULL; | |
111 | } | |
112 | if (zclient->t_connect) | |
113 | { | |
114 | thread_cancel (zclient->t_connect); | |
115 | zclient->t_connect = NULL; | |
116 | } | |
117 | ||
118 | /* Close socket. */ | |
119 | if (zclient->sock >= 0) | |
120 | { | |
121 | close (zclient->sock); | |
122 | zclient->sock = -1; | |
123 | } | |
124 | zclient->fail = 0; | |
125 | } | |
126 | ||
127 | void | |
128 | zclient_reset (struct zclient *zclient) | |
129 | { | |
130 | zclient_stop (zclient); | |
131 | zclient_init (zclient, zclient->redist_default); | |
132 | } | |
133 | ||
134 | /* Make socket to zebra daemon. Return zebra socket. */ | |
135 | int | |
136 | zclient_socket () | |
137 | { | |
138 | int sock; | |
139 | int ret; | |
140 | struct sockaddr_in serv; | |
141 | ||
142 | /* We should think about IPv6 connection. */ | |
143 | sock = socket (AF_INET, SOCK_STREAM, 0); | |
144 | if (sock < 0) | |
145 | return -1; | |
146 | ||
147 | /* Make server socket. */ | |
148 | memset (&serv, 0, sizeof (struct sockaddr_in)); | |
149 | serv.sin_family = AF_INET; | |
150 | serv.sin_port = htons (ZEBRA_PORT); | |
151 | #ifdef HAVE_SIN_LEN | |
152 | serv.sin_len = sizeof (struct sockaddr_in); | |
153 | #endif /* HAVE_SIN_LEN */ | |
154 | serv.sin_addr.s_addr = htonl (INADDR_LOOPBACK); | |
155 | ||
156 | /* Connect to zebra. */ | |
157 | ret = connect (sock, (struct sockaddr *) &serv, sizeof (serv)); | |
158 | if (ret < 0) | |
159 | { | |
160 | close (sock); | |
161 | return -1; | |
162 | } | |
163 | return sock; | |
164 | } | |
165 | ||
166 | /* For sockaddr_un. */ | |
167 | #include <sys/un.h> | |
168 | ||
169 | int | |
170 | zclient_socket_un (char *path) | |
171 | { | |
172 | int ret; | |
173 | int sock, len; | |
174 | struct sockaddr_un addr; | |
175 | ||
176 | sock = socket (AF_UNIX, SOCK_STREAM, 0); | |
177 | if (sock < 0) | |
178 | return -1; | |
179 | ||
180 | /* Make server socket. */ | |
181 | memset (&addr, 0, sizeof (struct sockaddr_un)); | |
182 | addr.sun_family = AF_UNIX; | |
183 | strncpy (addr.sun_path, path, strlen (path)); | |
184 | #ifdef HAVE_SUN_LEN | |
185 | len = addr.sun_len = SUN_LEN(&addr); | |
186 | #else | |
187 | len = sizeof (addr.sun_family) + strlen (addr.sun_path); | |
188 | #endif /* HAVE_SUN_LEN */ | |
189 | ||
190 | ret = connect (sock, (struct sockaddr *) &addr, len); | |
191 | if (ret < 0) | |
192 | { | |
193 | close (sock); | |
194 | return -1; | |
195 | } | |
196 | return sock; | |
197 | } | |
198 | ||
199 | /* Send simple Zebra message. */ | |
200 | int | |
201 | zebra_message_send (struct zclient *zclient, int command) | |
202 | { | |
203 | struct stream *s; | |
204 | ||
205 | /* Get zclient output buffer. */ | |
206 | s = zclient->obuf; | |
207 | stream_reset (s); | |
208 | ||
209 | /* Send very simple command only Zebra message. */ | |
210 | stream_putw (s, 3); | |
211 | stream_putc (s, command); | |
212 | ||
213 | return writen (zclient->sock, s->data, 3); | |
214 | } | |
215 | ||
216 | /* Make connection to zebra daemon. */ | |
217 | int | |
218 | zclient_start (struct zclient *zclient) | |
219 | { | |
220 | int i; | |
221 | ||
222 | if (zclient_debug) | |
223 | zlog_info ("zclient_start is called"); | |
224 | ||
225 | /* zclient is disabled. */ | |
226 | if (! zclient->enable) | |
227 | return 0; | |
228 | ||
229 | /* If already connected to the zebra. */ | |
230 | if (zclient->sock >= 0) | |
231 | return 0; | |
232 | ||
233 | /* Check connect thread. */ | |
234 | if (zclient->t_connect) | |
235 | return 0; | |
236 | ||
237 | /* Make socket. */ | |
238 | #ifdef HAVE_TCP_ZEBRA | |
239 | zclient->sock = zclient_socket (); | |
240 | #else | |
241 | zclient->sock = zclient_socket_un (ZEBRA_SERV_PATH); | |
242 | #endif /* HAVE_TCP_ZEBRA */ | |
243 | if (zclient->sock < 0) | |
244 | { | |
245 | if (zclient_debug) | |
246 | zlog_info ("zclient connection fail"); | |
247 | zclient->fail++; | |
248 | zclient_event (ZCLIENT_CONNECT, zclient); | |
249 | return -1; | |
250 | } | |
251 | ||
252 | /* Clear fail count. */ | |
253 | zclient->fail = 0; | |
254 | if (zclient_debug) | |
255 | zlog_info ("zclient connect success with socket [%d]", zclient->sock); | |
256 | ||
257 | /* Create read thread. */ | |
258 | zclient_event (ZCLIENT_READ, zclient); | |
259 | ||
260 | /* We need interface information. */ | |
261 | zebra_message_send (zclient, ZEBRA_INTERFACE_ADD); | |
262 | ||
263 | /* Flush all redistribute request. */ | |
264 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
265 | if (i != zclient->redist_default && zclient->redist[i]) | |
266 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_ADD, zclient->sock, i); | |
267 | ||
268 | /* If default information is needed. */ | |
269 | if (zclient->default_information) | |
270 | zebra_message_send (zclient, ZEBRA_REDISTRIBUTE_DEFAULT_ADD); | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
275 | /* This function is a wrapper function for calling zclient_start from | |
276 | timer or event thread. */ | |
277 | int | |
278 | zclient_connect (struct thread *t) | |
279 | { | |
280 | struct zclient *zclient; | |
281 | ||
282 | zclient = THREAD_ARG (t); | |
283 | zclient->t_connect = NULL; | |
284 | ||
285 | if (zclient_debug) | |
286 | zlog_info ("zclient_connect is called"); | |
287 | ||
288 | return zclient_start (zclient); | |
289 | } | |
290 | \f | |
291 | int | |
292 | zapi_ipv4_add (struct zclient *zclient, struct prefix_ipv4 *p, | |
293 | struct zapi_ipv4 *api) | |
294 | { | |
295 | int i; | |
296 | int psize; | |
297 | struct stream *s; | |
298 | ||
299 | /* Reset stream. */ | |
300 | s = zclient->obuf; | |
301 | stream_reset (s); | |
302 | ||
303 | /* Length place holder. */ | |
304 | stream_putw (s, 0); | |
305 | ||
306 | /* Put command, type and nexthop. */ | |
307 | stream_putc (s, ZEBRA_IPV4_ROUTE_ADD); | |
308 | stream_putc (s, api->type); | |
309 | stream_putc (s, api->flags); | |
310 | stream_putc (s, api->message); | |
311 | ||
312 | /* Put prefix information. */ | |
313 | psize = PSIZE (p->prefixlen); | |
314 | stream_putc (s, p->prefixlen); | |
315 | stream_write (s, (u_char *)&p->prefix, psize); | |
316 | ||
317 | /* Nexthop, ifindex, distance and metric information. */ | |
318 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) | |
319 | { | |
320 | if (CHECK_FLAG (api->flags, ZEBRA_FLAG_BLACKHOLE)) | |
321 | { | |
322 | stream_putc (s, 1); | |
323 | stream_putc (s, ZEBRA_NEXTHOP_BLACKHOLE); | |
324 | /* XXX assert(api->nexthop_num == 0); */ | |
325 | /* XXX assert(api->ifindex_num == 0); */ | |
326 | } | |
327 | else | |
328 | stream_putc (s, api->nexthop_num + api->ifindex_num); | |
329 | ||
330 | for (i = 0; i < api->nexthop_num; i++) | |
331 | { | |
332 | stream_putc (s, ZEBRA_NEXTHOP_IPV4); | |
333 | stream_put_in_addr (s, api->nexthop[i]); | |
334 | } | |
335 | for (i = 0; i < api->ifindex_num; i++) | |
336 | { | |
337 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
338 | stream_putl (s, api->ifindex[i]); | |
339 | } | |
340 | } | |
341 | ||
342 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) | |
343 | stream_putc (s, api->distance); | |
344 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) | |
345 | stream_putl (s, api->metric); | |
346 | ||
347 | /* Put length at the first point of the stream. */ | |
348 | stream_putw_at (s, 0, stream_get_endp (s)); | |
349 | ||
350 | return writen (zclient->sock, s->data, stream_get_endp (s)); | |
351 | } | |
352 | ||
353 | int | |
354 | zapi_ipv4_delete (struct zclient *zclient, struct prefix_ipv4 *p, | |
355 | struct zapi_ipv4 *api) | |
356 | { | |
357 | int i; | |
358 | int psize; | |
359 | struct stream *s; | |
360 | ||
361 | /* Reset stream. */ | |
362 | s = zclient->obuf; | |
363 | stream_reset (s); | |
364 | ||
365 | /* Length place holder. */ | |
366 | stream_putw (s, 0); | |
367 | ||
368 | /* Put command, type and nexthop. */ | |
369 | stream_putc (s, ZEBRA_IPV4_ROUTE_DELETE); | |
370 | stream_putc (s, api->type); | |
371 | stream_putc (s, api->flags); | |
372 | stream_putc (s, api->message); | |
373 | ||
374 | /* Put prefix information. */ | |
375 | psize = PSIZE (p->prefixlen); | |
376 | stream_putc (s, p->prefixlen); | |
377 | stream_write (s, (u_char *)&p->prefix, psize); | |
378 | ||
379 | /* Nexthop, ifindex, distance and metric information. */ | |
380 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) | |
381 | { | |
382 | if (CHECK_FLAG (api->flags, ZEBRA_FLAG_BLACKHOLE)) | |
383 | { | |
384 | stream_putc (s, 1); | |
385 | stream_putc (s, ZEBRA_NEXTHOP_BLACKHOLE); | |
386 | /* XXX assert(api->nexthop_num == 0); */ | |
387 | /* XXX assert(api->ifindex_num == 0); */ | |
388 | } | |
389 | else | |
390 | stream_putc (s, api->nexthop_num + api->ifindex_num); | |
391 | ||
392 | for (i = 0; i < api->nexthop_num; i++) | |
393 | { | |
394 | stream_putc (s, ZEBRA_NEXTHOP_IPV4); | |
395 | stream_put_in_addr (s, api->nexthop[i]); | |
396 | } | |
397 | for (i = 0; i < api->ifindex_num; i++) | |
398 | { | |
399 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
400 | stream_putl (s, api->ifindex[i]); | |
401 | } | |
402 | } | |
403 | ||
404 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) | |
405 | stream_putc (s, api->distance); | |
406 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) | |
407 | stream_putl (s, api->metric); | |
408 | ||
409 | /* Put length at the first point of the stream. */ | |
410 | stream_putw_at (s, 0, stream_get_endp (s)); | |
411 | ||
412 | return writen (zclient->sock, s->data, stream_get_endp (s)); | |
413 | } | |
414 | ||
415 | #ifdef HAVE_IPV6 | |
416 | int | |
417 | zapi_ipv6_add (struct zclient *zclient, struct prefix_ipv6 *p, | |
418 | struct zapi_ipv6 *api) | |
419 | { | |
420 | int i; | |
421 | int psize; | |
422 | struct stream *s; | |
423 | ||
424 | /* Reset stream. */ | |
425 | s = zclient->obuf; | |
426 | stream_reset (s); | |
427 | ||
428 | /* Length place holder. */ | |
429 | stream_putw (s, 0); | |
430 | ||
431 | /* Put command, type and nexthop. */ | |
432 | stream_putc (s, ZEBRA_IPV6_ROUTE_ADD); | |
433 | stream_putc (s, api->type); | |
434 | stream_putc (s, api->flags); | |
435 | stream_putc (s, api->message); | |
436 | ||
437 | /* Put prefix information. */ | |
438 | psize = PSIZE (p->prefixlen); | |
439 | stream_putc (s, p->prefixlen); | |
440 | stream_write (s, (u_char *)&p->prefix, psize); | |
441 | ||
442 | /* Nexthop, ifindex, distance and metric information. */ | |
443 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) | |
444 | { | |
445 | stream_putc (s, api->nexthop_num + api->ifindex_num); | |
446 | ||
447 | for (i = 0; i < api->nexthop_num; i++) | |
448 | { | |
449 | stream_putc (s, ZEBRA_NEXTHOP_IPV6); | |
450 | stream_write (s, (u_char *)api->nexthop[i], 16); | |
451 | } | |
452 | for (i = 0; i < api->ifindex_num; i++) | |
453 | { | |
454 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
455 | stream_putl (s, api->ifindex[i]); | |
456 | } | |
457 | } | |
458 | ||
459 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) | |
460 | stream_putc (s, api->distance); | |
461 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) | |
462 | stream_putl (s, api->metric); | |
463 | ||
464 | /* Put length at the first point of the stream. */ | |
465 | stream_putw_at (s, 0, stream_get_endp (s)); | |
466 | ||
467 | return writen (zclient->sock, s->data, stream_get_endp (s)); | |
468 | } | |
469 | ||
470 | int | |
471 | zapi_ipv6_delete (struct zclient *zclient, struct prefix_ipv6 *p, | |
472 | struct zapi_ipv6 *api) | |
473 | { | |
474 | int i; | |
475 | int psize; | |
476 | struct stream *s; | |
477 | ||
478 | /* Reset stream. */ | |
479 | s = zclient->obuf; | |
480 | stream_reset (s); | |
481 | ||
482 | /* Length place holder. */ | |
483 | stream_putw (s, 0); | |
484 | ||
485 | /* Put command, type and nexthop. */ | |
486 | stream_putc (s, ZEBRA_IPV6_ROUTE_DELETE); | |
487 | stream_putc (s, api->type); | |
488 | stream_putc (s, api->flags); | |
489 | stream_putc (s, api->message); | |
490 | ||
491 | /* Put prefix information. */ | |
492 | psize = PSIZE (p->prefixlen); | |
493 | stream_putc (s, p->prefixlen); | |
494 | stream_write (s, (u_char *)&p->prefix, psize); | |
495 | ||
496 | /* Nexthop, ifindex, distance and metric information. */ | |
497 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) | |
498 | { | |
499 | stream_putc (s, api->nexthop_num + api->ifindex_num); | |
500 | ||
501 | for (i = 0; i < api->nexthop_num; i++) | |
502 | { | |
503 | stream_putc (s, ZEBRA_NEXTHOP_IPV6); | |
504 | stream_write (s, (u_char *)api->nexthop[i], 16); | |
505 | } | |
506 | for (i = 0; i < api->ifindex_num; i++) | |
507 | { | |
508 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
509 | stream_putl (s, api->ifindex[i]); | |
510 | } | |
511 | } | |
512 | ||
513 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) | |
514 | stream_putc (s, api->distance); | |
515 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) | |
516 | stream_putl (s, api->metric); | |
517 | ||
518 | /* Put length at the first point of the stream. */ | |
519 | stream_putw_at (s, 0, stream_get_endp (s)); | |
520 | ||
521 | return writen (zclient->sock, s->data, stream_get_endp (s)); | |
522 | } | |
523 | ||
524 | #endif /* HAVE_IPV6 */ | |
525 | ||
526 | int | |
527 | zebra_redistribute_send (int command, int sock, int type) | |
528 | { | |
529 | int ret; | |
530 | struct stream *s; | |
531 | ||
532 | s = stream_new (ZEBRA_MAX_PACKET_SIZ); | |
533 | ||
534 | /* Total length of the messages. */ | |
535 | stream_putw (s, 4); | |
536 | ||
537 | stream_putc (s, command); | |
538 | stream_putc (s, type); | |
539 | ||
540 | ret = writen (sock, s->data, 4); | |
541 | ||
542 | stream_free (s); | |
543 | ||
544 | return ret; | |
545 | } | |
546 | ||
547 | /* Interface addition from zebra daemon. */ | |
548 | struct interface * | |
549 | zebra_interface_add_read (struct stream *s) | |
550 | { | |
551 | struct interface *ifp; | |
552 | u_char ifname_tmp[INTERFACE_NAMSIZ]; | |
553 | ||
554 | /* Read interface name. */ | |
555 | stream_get (ifname_tmp, s, INTERFACE_NAMSIZ); | |
556 | ||
557 | /* Lookup this by interface name. */ | |
558 | ifp = if_lookup_by_name (ifname_tmp); | |
559 | ||
560 | /* If such interface does not exist, make new one. */ | |
561 | if (! ifp) | |
562 | ifp = if_create (ifname_tmp, INTERFACE_NAMSIZ); | |
563 | ||
564 | /* Read interface's index. */ | |
565 | ifp->ifindex = stream_getl (s); | |
566 | ||
567 | /* Read interface's value. */ | |
568 | ifp->status = stream_getc (s); | |
569 | ifp->flags = stream_getl (s); | |
570 | ifp->metric = stream_getl (s); | |
571 | ifp->mtu = stream_getl (s); | |
572 | ifp->bandwidth = stream_getl (s); | |
573 | #ifdef HAVE_SOCKADDR_DL | |
574 | stream_get (&ifp->sdl, s, sizeof (ifp->sdl)); | |
575 | #else | |
576 | ifp->hw_addr_len = stream_getl (s); | |
577 | if (ifp->hw_addr_len) | |
578 | stream_get (ifp->hw_addr, s, ifp->hw_addr_len); | |
579 | #endif /* HAVE_SOCKADDR_DL */ | |
580 | ||
581 | return ifp; | |
582 | } | |
583 | ||
584 | /* Read interface up/down msg from zebra daemon. */ | |
585 | struct interface * | |
586 | zebra_interface_state_read (struct stream *s) | |
587 | { | |
588 | struct interface *ifp; | |
589 | u_char ifname_tmp[INTERFACE_NAMSIZ]; | |
590 | ||
591 | /* Read interface name. */ | |
592 | stream_get (ifname_tmp, s, INTERFACE_NAMSIZ); | |
593 | ||
594 | /* Lookup this by interface index. */ | |
595 | ifp = if_lookup_by_name (ifname_tmp); | |
596 | ||
597 | /* If such interface does not exist, indicate an error */ | |
598 | if (! ifp) | |
599 | return NULL; | |
600 | ||
601 | /* Read interface's index. */ | |
602 | ifp->ifindex = stream_getl (s); | |
603 | ||
604 | /* Read interface's value. */ | |
605 | ifp->status = stream_getc (s); | |
606 | ifp->flags = stream_getl (s); | |
607 | ifp->metric = stream_getl (s); | |
608 | ifp->mtu = stream_getl (s); | |
609 | ifp->bandwidth = stream_getl (s); | |
610 | ||
611 | return ifp; | |
612 | } | |
613 | ||
614 | struct connected * | |
615 | zebra_interface_address_add_read (struct stream *s) | |
616 | { | |
617 | unsigned int ifindex; | |
618 | struct interface *ifp; | |
619 | struct connected *ifc; | |
620 | struct prefix *p; | |
621 | int family; | |
622 | int plen; | |
623 | ||
624 | /* Get interface index. */ | |
625 | ifindex = stream_getl (s); | |
626 | ||
627 | /* Lookup index. */ | |
628 | ifp = if_lookup_by_index (ifindex); | |
629 | if (ifp == NULL) | |
630 | { | |
631 | zlog_warn ("zebra_interface_address_add_read: Can't find interface by ifindex: %d ", ifindex); | |
632 | return NULL; | |
633 | } | |
634 | ||
635 | /* Allocate new connected address. */ | |
636 | ifc = connected_new (); | |
637 | ifc->ifp = ifp; | |
638 | ||
639 | /* Fetch flag. */ | |
640 | ifc->flags = stream_getc (s); | |
641 | ||
642 | /* Fetch interface address. */ | |
643 | p = prefix_new (); | |
644 | family = p->family = stream_getc (s); | |
645 | ||
646 | plen = prefix_blen (p); | |
647 | stream_get (&p->u.prefix, s, plen); | |
648 | p->prefixlen = stream_getc (s); | |
649 | ifc->address = p; | |
650 | ||
651 | /* Fetch destination address. */ | |
652 | p = prefix_new (); | |
653 | stream_get (&p->u.prefix, s, plen); | |
654 | p->family = family; | |
655 | ||
656 | ifc->destination = p; | |
657 | ||
658 | p = ifc->address; | |
659 | ||
660 | /* Add connected address to the interface. */ | |
661 | listnode_add (ifp->connected, ifc); | |
662 | ||
663 | return ifc; | |
664 | } | |
665 | ||
666 | struct connected * | |
667 | zebra_interface_address_delete_read (struct stream *s) | |
668 | { | |
669 | unsigned int ifindex; | |
670 | struct interface *ifp; | |
671 | struct connected *ifc; | |
672 | struct prefix p; | |
673 | struct prefix d; | |
674 | int family; | |
675 | int len; | |
676 | u_char flags; | |
677 | ||
678 | /* Get interface index. */ | |
679 | ifindex = stream_getl (s); | |
680 | ||
681 | /* Lookup index. */ | |
682 | ifp = if_lookup_by_index (ifindex); | |
683 | if (ifp == NULL) | |
684 | { | |
685 | zlog_warn ("zebra_interface_address_delete_read: Can't find interface by ifindex: %d ", ifindex); | |
686 | return NULL; | |
687 | } | |
688 | ||
689 | /* Fetch flag. */ | |
690 | flags = stream_getc (s); | |
691 | ||
692 | /* Fetch interface address. */ | |
693 | family = p.family = stream_getc (s); | |
694 | ||
695 | len = prefix_blen (&p); | |
696 | stream_get (&p.u.prefix, s, len); | |
697 | p.prefixlen = stream_getc (s); | |
698 | ||
699 | /* Fetch destination address. */ | |
700 | stream_get (&d.u.prefix, s, len); | |
701 | d.family = family; | |
702 | ||
703 | ifc = connected_delete_by_prefix (ifp, &p); | |
704 | ||
705 | return ifc; | |
706 | } | |
707 | \f | |
708 | /* Zebra client message read function. */ | |
709 | int | |
710 | zclient_read (struct thread *thread) | |
711 | { | |
712 | int ret; | |
713 | int nbytes; | |
714 | int sock; | |
715 | zebra_size_t length; | |
716 | zebra_command_t command; | |
717 | struct zclient *zclient; | |
718 | ||
719 | /* Get socket to zebra. */ | |
720 | sock = THREAD_FD (thread); | |
721 | zclient = THREAD_ARG (thread); | |
722 | zclient->t_read = NULL; | |
723 | ||
724 | /* Clear input buffer. */ | |
725 | stream_reset (zclient->ibuf); | |
726 | ||
727 | /* Read zebra header. */ | |
728 | nbytes = stream_read (zclient->ibuf, sock, ZEBRA_HEADER_SIZE); | |
729 | ||
730 | /* zebra socket is closed. */ | |
731 | if (nbytes == 0) | |
732 | { | |
733 | if (zclient_debug) | |
734 | zlog_info ("zclient connection closed socket [%d].", sock); | |
735 | zclient->fail++; | |
736 | zclient_stop (zclient); | |
737 | zclient_event (ZCLIENT_CONNECT, zclient); | |
738 | return -1; | |
739 | } | |
740 | ||
741 | /* zebra read error. */ | |
742 | if (nbytes < 0 || nbytes != ZEBRA_HEADER_SIZE) | |
743 | { | |
744 | if (zclient_debug) | |
745 | zlog_info ("Can't read all packet (length %d).", nbytes); | |
746 | zclient->fail++; | |
747 | zclient_stop (zclient); | |
748 | zclient_event (ZCLIENT_CONNECT, zclient); | |
749 | return -1; | |
750 | } | |
751 | ||
752 | /* Fetch length and command. */ | |
753 | length = stream_getw (zclient->ibuf); | |
754 | command = stream_getc (zclient->ibuf); | |
755 | ||
756 | /* Length check. */ | |
757 | if (length >= zclient->ibuf->size) | |
758 | { | |
759 | stream_free (zclient->ibuf); | |
760 | zclient->ibuf = stream_new (length + 1); | |
761 | } | |
762 | length -= ZEBRA_HEADER_SIZE; | |
763 | ||
764 | /* Read rest of zebra packet. */ | |
765 | nbytes = stream_read (zclient->ibuf, sock, length); | |
766 | if (nbytes != length) | |
767 | { | |
768 | if (zclient_debug) | |
769 | zlog_info ("zclient connection closed socket [%d].", sock); | |
770 | zclient->fail++; | |
771 | zclient_stop (zclient); | |
772 | zclient_event (ZCLIENT_CONNECT, zclient); | |
773 | return -1; | |
774 | } | |
775 | ||
776 | switch (command) | |
777 | { | |
778 | case ZEBRA_INTERFACE_ADD: | |
779 | if (zclient->interface_add) | |
780 | ret = (*zclient->interface_add) (command, zclient, length); | |
781 | break; | |
782 | case ZEBRA_INTERFACE_DELETE: | |
783 | if (zclient->interface_delete) | |
784 | ret = (*zclient->interface_delete) (command, zclient, length); | |
785 | break; | |
786 | case ZEBRA_INTERFACE_ADDRESS_ADD: | |
787 | if (zclient->interface_address_add) | |
788 | ret = (*zclient->interface_address_add) (command, zclient, length); | |
789 | break; | |
790 | case ZEBRA_INTERFACE_ADDRESS_DELETE: | |
791 | if (zclient->interface_address_delete) | |
792 | ret = (*zclient->interface_address_delete) (command, zclient, length); | |
793 | break; | |
794 | case ZEBRA_INTERFACE_UP: | |
795 | if (zclient->interface_up) | |
796 | ret = (*zclient->interface_up) (command, zclient, length); | |
797 | break; | |
798 | case ZEBRA_INTERFACE_DOWN: | |
799 | if (zclient->interface_down) | |
800 | ret = (*zclient->interface_down) (command, zclient, length); | |
801 | break; | |
802 | case ZEBRA_IPV4_ROUTE_ADD: | |
803 | if (zclient->ipv4_route_add) | |
804 | ret = (*zclient->ipv4_route_add) (command, zclient, length); | |
805 | break; | |
806 | case ZEBRA_IPV4_ROUTE_DELETE: | |
807 | if (zclient->ipv4_route_delete) | |
808 | ret = (*zclient->ipv4_route_delete) (command, zclient, length); | |
809 | break; | |
810 | case ZEBRA_IPV6_ROUTE_ADD: | |
811 | if (zclient->ipv6_route_add) | |
812 | ret = (*zclient->ipv6_route_add) (command, zclient, length); | |
813 | break; | |
814 | case ZEBRA_IPV6_ROUTE_DELETE: | |
815 | if (zclient->ipv6_route_delete) | |
816 | ret = (*zclient->ipv6_route_delete) (command, zclient, length); | |
817 | break; | |
818 | default: | |
819 | break; | |
820 | } | |
821 | ||
822 | /* Register read thread. */ | |
823 | zclient_event (ZCLIENT_READ, zclient); | |
824 | ||
825 | return 0; | |
826 | } | |
827 | ||
828 | void | |
829 | zclient_redistribute_set (struct zclient *zclient, int type) | |
830 | { | |
831 | if (zclient->redist[type]) | |
832 | return; | |
833 | ||
834 | zclient->redist[type] = 1; | |
835 | ||
836 | if (zclient->sock > 0) | |
837 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_ADD, zclient->sock, type); | |
838 | } | |
839 | ||
840 | void | |
841 | zclient_redistribute_unset (struct zclient *zclient, int type) | |
842 | { | |
843 | if (! zclient->redist[type]) | |
844 | return; | |
845 | ||
846 | zclient->redist[type] = 0; | |
847 | ||
848 | if (zclient->sock > 0) | |
849 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_DELETE, zclient->sock, type); | |
850 | } | |
851 | ||
852 | void | |
853 | zclient_redistribute_default_set (struct zclient *zclient) | |
854 | { | |
855 | if (zclient->default_information) | |
856 | return; | |
857 | ||
858 | zclient->default_information = 1; | |
859 | ||
860 | if (zclient->sock > 0) | |
861 | zebra_message_send (zclient, ZEBRA_REDISTRIBUTE_DEFAULT_ADD); | |
862 | } | |
863 | ||
864 | void | |
865 | zclient_redistribute_default_unset (struct zclient *zclient) | |
866 | { | |
867 | if (! zclient->default_information) | |
868 | return; | |
869 | ||
870 | zclient->default_information = 0; | |
871 | ||
872 | if (zclient->sock > 0) | |
873 | zebra_message_send (zclient, ZEBRA_REDISTRIBUTE_DEFAULT_DELETE); | |
874 | } | |
875 | \f | |
876 | extern struct thread_master *master; | |
877 | ||
878 | static void | |
879 | zclient_event (enum event event, struct zclient *zclient) | |
880 | { | |
881 | switch (event) | |
882 | { | |
883 | case ZCLIENT_SCHEDULE: | |
884 | if (! zclient->t_connect) | |
885 | zclient->t_connect = | |
886 | thread_add_event (master, zclient_connect, zclient, 0); | |
887 | break; | |
888 | case ZCLIENT_CONNECT: | |
889 | if (zclient->fail >= 10) | |
890 | return; | |
891 | if (zclient_debug) | |
892 | zlog_info ("zclient connect schedule interval is %d", | |
893 | zclient->fail < 3 ? 10 : 60); | |
894 | if (! zclient->t_connect) | |
895 | zclient->t_connect = | |
896 | thread_add_timer (master, zclient_connect, zclient, | |
897 | zclient->fail < 3 ? 10 : 60); | |
898 | break; | |
899 | case ZCLIENT_READ: | |
900 | zclient->t_read = | |
901 | thread_add_read (master, zclient_read, zclient, zclient->sock); | |
902 | break; | |
903 | } | |
904 | } |