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718e3744 | 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 | } | |
325 | else | |
326 | stream_putc (s, api->nexthop_num + api->ifindex_num); | |
327 | ||
328 | for (i = 0; i < api->nexthop_num; i++) | |
329 | { | |
330 | stream_putc (s, ZEBRA_NEXTHOP_IPV4); | |
331 | stream_put_in_addr (s, api->nexthop[i]); | |
332 | } | |
333 | for (i = 0; i < api->ifindex_num; i++) | |
334 | { | |
335 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
336 | stream_putl (s, api->ifindex[i]); | |
337 | } | |
338 | } | |
339 | ||
340 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) | |
341 | stream_putc (s, api->distance); | |
342 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) | |
343 | stream_putl (s, api->metric); | |
344 | ||
345 | /* Put length at the first point of the stream. */ | |
346 | stream_putw_at (s, 0, stream_get_endp (s)); | |
347 | ||
348 | return writen (zclient->sock, s->data, stream_get_endp (s)); | |
349 | } | |
350 | ||
351 | int | |
352 | zapi_ipv4_delete (struct zclient *zclient, struct prefix_ipv4 *p, | |
353 | struct zapi_ipv4 *api) | |
354 | { | |
355 | int i; | |
356 | int psize; | |
357 | struct stream *s; | |
358 | ||
359 | /* Reset stream. */ | |
360 | s = zclient->obuf; | |
361 | stream_reset (s); | |
362 | ||
363 | /* Length place holder. */ | |
364 | stream_putw (s, 0); | |
365 | ||
366 | /* Put command, type and nexthop. */ | |
367 | stream_putc (s, ZEBRA_IPV4_ROUTE_DELETE); | |
368 | stream_putc (s, api->type); | |
369 | stream_putc (s, api->flags); | |
370 | stream_putc (s, api->message); | |
371 | ||
372 | /* Put prefix information. */ | |
373 | psize = PSIZE (p->prefixlen); | |
374 | stream_putc (s, p->prefixlen); | |
375 | stream_write (s, (u_char *)&p->prefix, psize); | |
376 | ||
377 | /* Nexthop, ifindex, distance and metric information. */ | |
378 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) | |
379 | { | |
380 | if (CHECK_FLAG (api->flags, ZEBRA_FLAG_BLACKHOLE)) | |
381 | { | |
382 | stream_putc (s, 1); | |
383 | stream_putc (s, ZEBRA_NEXTHOP_BLACKHOLE); | |
384 | } | |
385 | else | |
386 | stream_putc (s, api->nexthop_num + api->ifindex_num); | |
387 | ||
388 | for (i = 0; i < api->nexthop_num; i++) | |
389 | { | |
390 | stream_putc (s, ZEBRA_NEXTHOP_IPV4); | |
391 | stream_put_in_addr (s, api->nexthop[i]); | |
392 | } | |
393 | for (i = 0; i < api->ifindex_num; i++) | |
394 | { | |
395 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
396 | stream_putl (s, api->ifindex[i]); | |
397 | } | |
398 | } | |
399 | ||
400 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) | |
401 | stream_putc (s, api->distance); | |
402 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) | |
403 | stream_putl (s, api->metric); | |
404 | ||
405 | /* Put length at the first point of the stream. */ | |
406 | stream_putw_at (s, 0, stream_get_endp (s)); | |
407 | ||
408 | return writen (zclient->sock, s->data, stream_get_endp (s)); | |
409 | } | |
410 | ||
411 | #ifdef HAVE_IPV6 | |
412 | int | |
413 | zapi_ipv6_add (struct zclient *zclient, struct prefix_ipv6 *p, | |
414 | struct zapi_ipv6 *api) | |
415 | { | |
416 | int i; | |
417 | int psize; | |
418 | struct stream *s; | |
419 | ||
420 | /* Reset stream. */ | |
421 | s = zclient->obuf; | |
422 | stream_reset (s); | |
423 | ||
424 | /* Length place holder. */ | |
425 | stream_putw (s, 0); | |
426 | ||
427 | /* Put command, type and nexthop. */ | |
428 | stream_putc (s, ZEBRA_IPV6_ROUTE_ADD); | |
429 | stream_putc (s, api->type); | |
430 | stream_putc (s, api->flags); | |
431 | stream_putc (s, api->message); | |
432 | ||
433 | /* Put prefix information. */ | |
434 | psize = PSIZE (p->prefixlen); | |
435 | stream_putc (s, p->prefixlen); | |
436 | stream_write (s, (u_char *)&p->prefix, psize); | |
437 | ||
438 | /* Nexthop, ifindex, distance and metric information. */ | |
439 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) | |
440 | { | |
441 | stream_putc (s, api->nexthop_num + api->ifindex_num); | |
442 | ||
443 | for (i = 0; i < api->nexthop_num; i++) | |
444 | { | |
445 | stream_putc (s, ZEBRA_NEXTHOP_IPV6); | |
446 | stream_write (s, (u_char *)api->nexthop[i], 16); | |
447 | } | |
448 | for (i = 0; i < api->ifindex_num; i++) | |
449 | { | |
450 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
451 | stream_putl (s, api->ifindex[i]); | |
452 | } | |
453 | } | |
454 | ||
455 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) | |
456 | stream_putc (s, api->distance); | |
457 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) | |
458 | stream_putl (s, api->metric); | |
459 | ||
460 | /* Put length at the first point of the stream. */ | |
461 | stream_putw_at (s, 0, stream_get_endp (s)); | |
462 | ||
463 | return writen (zclient->sock, s->data, stream_get_endp (s)); | |
464 | } | |
465 | ||
466 | int | |
467 | zapi_ipv6_delete (struct zclient *zclient, struct prefix_ipv6 *p, | |
468 | struct zapi_ipv6 *api) | |
469 | { | |
470 | int i; | |
471 | int psize; | |
472 | struct stream *s; | |
473 | ||
474 | /* Reset stream. */ | |
475 | s = zclient->obuf; | |
476 | stream_reset (s); | |
477 | ||
478 | /* Length place holder. */ | |
479 | stream_putw (s, 0); | |
480 | ||
481 | /* Put command, type and nexthop. */ | |
482 | stream_putc (s, ZEBRA_IPV6_ROUTE_DELETE); | |
483 | stream_putc (s, api->type); | |
484 | stream_putc (s, api->flags); | |
485 | stream_putc (s, api->message); | |
486 | ||
487 | /* Put prefix information. */ | |
488 | psize = PSIZE (p->prefixlen); | |
489 | stream_putc (s, p->prefixlen); | |
490 | stream_write (s, (u_char *)&p->prefix, psize); | |
491 | ||
492 | /* Nexthop, ifindex, distance and metric information. */ | |
493 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) | |
494 | { | |
495 | stream_putc (s, api->nexthop_num + api->ifindex_num); | |
496 | ||
497 | for (i = 0; i < api->nexthop_num; i++) | |
498 | { | |
499 | stream_putc (s, ZEBRA_NEXTHOP_IPV6); | |
500 | stream_write (s, (u_char *)api->nexthop[i], 16); | |
501 | } | |
502 | for (i = 0; i < api->ifindex_num; i++) | |
503 | { | |
504 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
505 | stream_putl (s, api->ifindex[i]); | |
506 | } | |
507 | } | |
508 | ||
509 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) | |
510 | stream_putc (s, api->distance); | |
511 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) | |
512 | stream_putl (s, api->metric); | |
513 | ||
514 | /* Put length at the first point of the stream. */ | |
515 | stream_putw_at (s, 0, stream_get_endp (s)); | |
516 | ||
517 | return writen (zclient->sock, s->data, stream_get_endp (s)); | |
518 | } | |
519 | ||
520 | #endif /* HAVE_IPV6 */ | |
521 | ||
522 | int | |
523 | zebra_redistribute_send (int command, int sock, int type) | |
524 | { | |
525 | int ret; | |
526 | struct stream *s; | |
527 | ||
528 | s = stream_new (ZEBRA_MAX_PACKET_SIZ); | |
529 | ||
530 | /* Total length of the messages. */ | |
531 | stream_putw (s, 4); | |
532 | ||
533 | stream_putc (s, command); | |
534 | stream_putc (s, type); | |
535 | ||
536 | ret = writen (sock, s->data, 4); | |
537 | ||
538 | stream_free (s); | |
539 | ||
540 | return ret; | |
541 | } | |
542 | ||
543 | /* Interface addition from zebra daemon. */ | |
544 | struct interface * | |
545 | zebra_interface_add_read (struct stream *s) | |
546 | { | |
547 | struct interface *ifp; | |
548 | u_char ifname_tmp[INTERFACE_NAMSIZ]; | |
549 | ||
550 | /* Read interface name. */ | |
551 | stream_get (ifname_tmp, s, INTERFACE_NAMSIZ); | |
552 | ||
553 | /* Lookup this by interface name. */ | |
554 | ifp = if_lookup_by_name (ifname_tmp); | |
555 | ||
556 | /* If such interface does not exist, make new one. */ | |
557 | if (! ifp) | |
558 | { | |
559 | ifp = if_create (); | |
560 | strncpy (ifp->name, ifname_tmp, IFNAMSIZ); | |
561 | } | |
562 | ||
563 | /* Read interface's index. */ | |
564 | ifp->ifindex = stream_getl (s); | |
565 | ||
566 | /* Read interface's value. */ | |
567 | ifp->flags = stream_getl (s); | |
568 | ifp->metric = stream_getl (s); | |
569 | ifp->mtu = stream_getl (s); | |
570 | ifp->bandwidth = stream_getl (s); | |
571 | #ifdef HAVE_SOCKADDR_DL | |
572 | stream_get (&ifp->sdl, s, sizeof (ifp->sdl)); | |
573 | #else | |
574 | ifp->hw_addr_len = stream_getl (s); | |
575 | if (ifp->hw_addr_len) | |
576 | stream_get (ifp->hw_addr, s, ifp->hw_addr_len); | |
577 | #endif /* HAVE_SOCKADDR_DL */ | |
578 | ||
579 | return ifp; | |
580 | } | |
581 | ||
582 | /* Read interface up/down msg from zebra daemon. */ | |
583 | struct interface * | |
584 | zebra_interface_state_read (struct stream *s) | |
585 | { | |
586 | struct interface *ifp; | |
587 | u_char ifname_tmp[INTERFACE_NAMSIZ]; | |
588 | ||
589 | /* Read interface name. */ | |
590 | stream_get (ifname_tmp, s, INTERFACE_NAMSIZ); | |
591 | ||
592 | /* Lookup this by interface index. */ | |
593 | ifp = if_lookup_by_name (ifname_tmp); | |
594 | ||
595 | /* If such interface does not exist, indicate an error */ | |
596 | if (! ifp) | |
597 | return NULL; | |
598 | ||
599 | /* Read interface's index. */ | |
600 | ifp->ifindex = stream_getl (s); | |
601 | ||
602 | /* Read interface's value. */ | |
603 | ifp->flags = stream_getl (s); | |
604 | ifp->metric = stream_getl (s); | |
605 | ifp->mtu = stream_getl (s); | |
606 | ifp->bandwidth = stream_getl (s); | |
607 | ||
608 | return ifp; | |
609 | } | |
610 | ||
611 | struct connected * | |
612 | zebra_interface_address_add_read (struct stream *s) | |
613 | { | |
614 | unsigned int ifindex; | |
615 | struct interface *ifp; | |
616 | struct connected *ifc; | |
617 | struct prefix *p; | |
618 | int family; | |
619 | int plen; | |
620 | ||
621 | /* Get interface index. */ | |
622 | ifindex = stream_getl (s); | |
623 | ||
624 | /* Lookup index. */ | |
625 | ifp = if_lookup_by_index (ifindex); | |
626 | if (ifp == NULL) | |
627 | { | |
628 | zlog_warn ("zebra_interface_address_add_read: Can't find interface by ifindex: %d ", ifindex); | |
629 | return NULL; | |
630 | } | |
631 | ||
632 | /* Allocate new connected address. */ | |
633 | ifc = connected_new (); | |
634 | ifc->ifp = ifp; | |
635 | ||
636 | /* Fetch flag. */ | |
637 | ifc->flags = stream_getc (s); | |
638 | ||
639 | /* Fetch interface address. */ | |
640 | p = prefix_new (); | |
641 | family = p->family = stream_getc (s); | |
642 | ||
643 | plen = prefix_blen (p); | |
644 | stream_get (&p->u.prefix, s, plen); | |
645 | p->prefixlen = stream_getc (s); | |
646 | ifc->address = p; | |
647 | ||
648 | /* Fetch destination address. */ | |
649 | p = prefix_new (); | |
650 | stream_get (&p->u.prefix, s, plen); | |
651 | p->family = family; | |
652 | ||
653 | ifc->destination = p; | |
654 | ||
655 | p = ifc->address; | |
656 | ||
657 | /* Add connected address to the interface. */ | |
658 | listnode_add (ifp->connected, ifc); | |
659 | ||
660 | return ifc; | |
661 | } | |
662 | ||
663 | struct connected * | |
664 | zebra_interface_address_delete_read (struct stream *s) | |
665 | { | |
666 | unsigned int ifindex; | |
667 | struct interface *ifp; | |
668 | struct connected *ifc; | |
669 | struct prefix p; | |
670 | struct prefix d; | |
671 | int family; | |
672 | int len; | |
673 | u_char flags; | |
674 | ||
675 | /* Get interface index. */ | |
676 | ifindex = stream_getl (s); | |
677 | ||
678 | /* Lookup index. */ | |
679 | ifp = if_lookup_by_index (ifindex); | |
680 | if (ifp == NULL) | |
681 | { | |
682 | zlog_warn ("zebra_interface_address_delete_read: Can't find interface by ifindex: %d ", ifindex); | |
683 | return NULL; | |
684 | } | |
685 | ||
686 | /* Fetch flag. */ | |
687 | flags = stream_getc (s); | |
688 | ||
689 | /* Fetch interface address. */ | |
690 | family = p.family = stream_getc (s); | |
691 | ||
692 | len = prefix_blen (&p); | |
693 | stream_get (&p.u.prefix, s, len); | |
694 | p.prefixlen = stream_getc (s); | |
695 | ||
696 | /* Fetch destination address. */ | |
697 | stream_get (&d.u.prefix, s, len); | |
698 | d.family = family; | |
699 | ||
700 | ifc = connected_delete_by_prefix (ifp, &p); | |
701 | ||
702 | return ifc; | |
703 | } | |
704 | \f | |
705 | /* Zebra client message read function. */ | |
706 | int | |
707 | zclient_read (struct thread *thread) | |
708 | { | |
709 | int ret; | |
710 | int nbytes; | |
711 | int sock; | |
712 | zebra_size_t length; | |
713 | zebra_command_t command; | |
714 | struct zclient *zclient; | |
715 | ||
716 | /* Get socket to zebra. */ | |
717 | sock = THREAD_FD (thread); | |
718 | zclient = THREAD_ARG (thread); | |
719 | zclient->t_read = NULL; | |
720 | ||
721 | /* Clear input buffer. */ | |
722 | stream_reset (zclient->ibuf); | |
723 | ||
724 | /* Read zebra header. */ | |
725 | nbytes = stream_read (zclient->ibuf, sock, ZEBRA_HEADER_SIZE); | |
726 | ||
727 | /* zebra socket is closed. */ | |
728 | if (nbytes == 0) | |
729 | { | |
730 | if (zclient_debug) | |
731 | zlog_info ("zclient connection closed socket [%d].", sock); | |
732 | zclient->fail++; | |
733 | zclient_stop (zclient); | |
734 | zclient_event (ZCLIENT_CONNECT, zclient); | |
735 | return -1; | |
736 | } | |
737 | ||
738 | /* zebra read error. */ | |
739 | if (nbytes < 0 || nbytes != ZEBRA_HEADER_SIZE) | |
740 | { | |
741 | if (zclient_debug) | |
742 | zlog_info ("Can't read all packet (length %d).", nbytes); | |
743 | zclient->fail++; | |
744 | zclient_stop (zclient); | |
745 | zclient_event (ZCLIENT_CONNECT, zclient); | |
746 | return -1; | |
747 | } | |
748 | ||
749 | /* Fetch length and command. */ | |
750 | length = stream_getw (zclient->ibuf); | |
751 | command = stream_getc (zclient->ibuf); | |
752 | ||
753 | /* Length check. */ | |
754 | if (length >= zclient->ibuf->size) | |
755 | { | |
756 | stream_free (zclient->ibuf); | |
757 | zclient->ibuf = stream_new (length + 1); | |
758 | } | |
759 | length -= ZEBRA_HEADER_SIZE; | |
760 | ||
761 | /* Read rest of zebra packet. */ | |
762 | nbytes = stream_read (zclient->ibuf, sock, length); | |
763 | if (nbytes != length) | |
764 | { | |
765 | if (zclient_debug) | |
766 | zlog_info ("zclient connection closed socket [%d].", sock); | |
767 | zclient->fail++; | |
768 | zclient_stop (zclient); | |
769 | zclient_event (ZCLIENT_CONNECT, zclient); | |
770 | return -1; | |
771 | } | |
772 | ||
773 | switch (command) | |
774 | { | |
775 | case ZEBRA_INTERFACE_ADD: | |
776 | if (zclient->interface_add) | |
777 | ret = (*zclient->interface_add) (command, zclient, length); | |
778 | break; | |
779 | case ZEBRA_INTERFACE_DELETE: | |
780 | if (zclient->interface_delete) | |
781 | ret = (*zclient->interface_delete) (command, zclient, length); | |
782 | break; | |
783 | case ZEBRA_INTERFACE_ADDRESS_ADD: | |
784 | if (zclient->interface_address_add) | |
785 | ret = (*zclient->interface_address_add) (command, zclient, length); | |
786 | break; | |
787 | case ZEBRA_INTERFACE_ADDRESS_DELETE: | |
788 | if (zclient->interface_address_delete) | |
789 | ret = (*zclient->interface_address_delete) (command, zclient, length); | |
790 | break; | |
791 | case ZEBRA_INTERFACE_UP: | |
792 | if (zclient->interface_up) | |
793 | ret = (*zclient->interface_up) (command, zclient, length); | |
794 | break; | |
795 | case ZEBRA_INTERFACE_DOWN: | |
796 | if (zclient->interface_down) | |
797 | ret = (*zclient->interface_down) (command, zclient, length); | |
798 | break; | |
799 | case ZEBRA_IPV4_ROUTE_ADD: | |
800 | if (zclient->ipv4_route_add) | |
801 | ret = (*zclient->ipv4_route_add) (command, zclient, length); | |
802 | break; | |
803 | case ZEBRA_IPV4_ROUTE_DELETE: | |
804 | if (zclient->ipv4_route_delete) | |
805 | ret = (*zclient->ipv4_route_delete) (command, zclient, length); | |
806 | break; | |
807 | case ZEBRA_IPV6_ROUTE_ADD: | |
808 | if (zclient->ipv6_route_add) | |
809 | ret = (*zclient->ipv6_route_add) (command, zclient, length); | |
810 | break; | |
811 | case ZEBRA_IPV6_ROUTE_DELETE: | |
812 | if (zclient->ipv6_route_delete) | |
813 | ret = (*zclient->ipv6_route_delete) (command, zclient, length); | |
814 | break; | |
815 | default: | |
816 | break; | |
817 | } | |
818 | ||
819 | /* Register read thread. */ | |
820 | zclient_event (ZCLIENT_READ, zclient); | |
821 | ||
822 | return 0; | |
823 | } | |
824 | ||
825 | void | |
826 | zclient_redistribute_set (struct zclient *zclient, int type) | |
827 | { | |
828 | if (zclient->redist[type]) | |
829 | return; | |
830 | ||
831 | zclient->redist[type] = 1; | |
832 | ||
833 | if (zclient->sock > 0) | |
834 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_ADD, zclient->sock, type); | |
835 | } | |
836 | ||
837 | void | |
838 | zclient_redistribute_unset (struct zclient *zclient, int type) | |
839 | { | |
840 | if (! zclient->redist[type]) | |
841 | return; | |
842 | ||
843 | zclient->redist[type] = 0; | |
844 | ||
845 | if (zclient->sock > 0) | |
846 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_DELETE, zclient->sock, type); | |
847 | } | |
848 | ||
849 | void | |
850 | zclient_redistribute_default_set (struct zclient *zclient) | |
851 | { | |
852 | if (zclient->default_information) | |
853 | return; | |
854 | ||
855 | zclient->default_information = 1; | |
856 | ||
857 | if (zclient->sock > 0) | |
858 | zebra_message_send (zclient, ZEBRA_REDISTRIBUTE_DEFAULT_ADD); | |
859 | } | |
860 | ||
861 | void | |
862 | zclient_redistribute_default_unset (struct zclient *zclient) | |
863 | { | |
864 | if (! zclient->default_information) | |
865 | return; | |
866 | ||
867 | zclient->default_information = 0; | |
868 | ||
869 | if (zclient->sock > 0) | |
870 | zebra_message_send (zclient, ZEBRA_REDISTRIBUTE_DEFAULT_DELETE); | |
871 | } | |
872 | \f | |
873 | extern struct thread_master *master; | |
874 | ||
875 | static void | |
876 | zclient_event (enum event event, struct zclient *zclient) | |
877 | { | |
878 | switch (event) | |
879 | { | |
880 | case ZCLIENT_SCHEDULE: | |
881 | if (! zclient->t_connect) | |
882 | zclient->t_connect = | |
883 | thread_add_event (master, zclient_connect, zclient, 0); | |
884 | break; | |
885 | case ZCLIENT_CONNECT: | |
886 | if (zclient->fail >= 10) | |
887 | return; | |
888 | if (zclient_debug) | |
889 | zlog_info ("zclient connect schedule interval is %d", | |
890 | zclient->fail < 3 ? 10 : 60); | |
891 | if (! zclient->t_connect) | |
892 | zclient->t_connect = | |
893 | thread_add_timer (master, zclient_connect, zclient, | |
894 | zclient->fail < 3 ? 10 : 60); | |
895 | break; | |
896 | case ZCLIENT_READ: | |
897 | zclient->t_read = | |
898 | thread_add_read (master, zclient_read, zclient, zclient->sock); | |
899 | break; | |
900 | } | |
901 | } |