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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) | |
8ddca704 | 94 | zlog_debug ("zclient start scheduled"); |
718e3744 | 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) | |
8ddca704 | 104 | zlog_debug ("zclient stopped"); |
718e3744 | 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 | |
8c328f11 | 170 | zclient_socket_un (const char *path) |
718e3744 | 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) | |
8ddca704 | 223 | zlog_debug ("zclient_start is called"); |
718e3744 | 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) | |
8ddca704 | 246 | zlog_debug ("zclient connection fail"); |
718e3744 | 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) | |
8ddca704 | 255 | zlog_debug ("zclient connect success with socket [%d]", zclient->sock); |
718e3744 | 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 | ||
18a6dce6 | 263 | /* We need router-id information. */ |
264 | zebra_message_send (zclient, ZEBRA_ROUTER_ID_ADD); | |
265 | ||
718e3744 | 266 | /* Flush all redistribute request. */ |
267 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
268 | if (i != zclient->redist_default && zclient->redist[i]) | |
269 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_ADD, zclient->sock, i); | |
270 | ||
271 | /* If default information is needed. */ | |
272 | if (zclient->default_information) | |
273 | zebra_message_send (zclient, ZEBRA_REDISTRIBUTE_DEFAULT_ADD); | |
274 | ||
275 | return 0; | |
276 | } | |
277 | ||
278 | /* This function is a wrapper function for calling zclient_start from | |
279 | timer or event thread. */ | |
280 | int | |
281 | zclient_connect (struct thread *t) | |
282 | { | |
283 | struct zclient *zclient; | |
284 | ||
285 | zclient = THREAD_ARG (t); | |
286 | zclient->t_connect = NULL; | |
287 | ||
288 | if (zclient_debug) | |
8ddca704 | 289 | zlog_debug ("zclient_connect is called"); |
718e3744 | 290 | |
291 | return zclient_start (zclient); | |
292 | } | |
293 | \f | |
0a589359 | 294 | /* |
295 | * "xdr_encode"-like interface that allows daemon (client) to send | |
296 | * a message to zebra server for a route that needs to be | |
297 | * added/deleted to the kernel. Info about the route is specified | |
298 | * by the caller in a struct zapi_ipv4. zapi_ipv4_read() then writes | |
299 | * the info down the zclient socket using the stream_* functions. | |
300 | * | |
301 | * The corresponding read ("xdr_decode") function on the server | |
302 | * side is zread_ipv4_add()/zread_ipv4_delete(). | |
303 | * | |
304 | * 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 1 2 3 4 5 6 7 8 9 A B C D E F | |
305 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
306 | * | Length (2) | Command | Route Type | | |
307 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
308 | * | ZEBRA Flags | Message Flags | Prefix length | | |
309 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
310 | * | Destination IPv4 Prefix for route | | |
311 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
312 | * | Nexthop count | | |
313 | * +-+-+-+-+-+-+-+-+ | |
314 | * | |
315 | * | |
316 | * A number of IPv4 nexthop(s) or nexthop interface index(es) are then | |
317 | * described, as per the Nexthop count. Each nexthop described as: | |
318 | * | |
319 | * +-+-+-+-+-+-+-+-+ | |
320 | * | Nexthop Type | Set to one of ZEBRA_NEXTHOP_* | |
321 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
322 | * | IPv4 Nexthop address or Interface Index number | | |
323 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
324 | * | |
325 | * Alternatively, if the flags field has ZEBRA_FLAG_BLACKHOLE or | |
326 | * ZEBRA_FLAG_REJECT is set then Nexthop count is set to 1, then _no_ | |
327 | * nexthop information is provided, and the message describes a prefix | |
328 | * to blackhole or reject route. | |
329 | * | |
330 | * If ZAPI_MESSAGE_DISTANCE is set, the distance value is written as a 1 | |
331 | * byte value. | |
332 | * | |
333 | * If ZAPI_MESSAGE_METRIC is set, the metric value is written as an 8 | |
334 | * byte value. | |
335 | * | |
336 | * XXX: No attention paid to alignment. | |
337 | */ | |
718e3744 | 338 | int |
0a589359 | 339 | zapi_ipv4_route (u_char cmd, struct zclient *zclient, struct prefix_ipv4 *p, |
340 | struct zapi_ipv4 *api) | |
718e3744 | 341 | { |
342 | int i; | |
343 | int psize; | |
344 | struct stream *s; | |
345 | ||
346 | /* Reset stream. */ | |
347 | s = zclient->obuf; | |
348 | stream_reset (s); | |
349 | ||
350 | /* Length place holder. */ | |
351 | stream_putw (s, 0); | |
352 | ||
353 | /* Put command, type and nexthop. */ | |
0a589359 | 354 | stream_putc (s, cmd); |
718e3744 | 355 | stream_putc (s, api->type); |
356 | stream_putc (s, api->flags); | |
357 | stream_putc (s, api->message); | |
718e3744 | 358 | |
718e3744 | 359 | /* Put prefix information. */ |
360 | psize = PSIZE (p->prefixlen); | |
361 | stream_putc (s, p->prefixlen); | |
0a589359 | 362 | stream_write (s, (u_char *) & p->prefix, psize); |
718e3744 | 363 | |
364 | /* Nexthop, ifindex, distance and metric information. */ | |
365 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) | |
366 | { | |
595db7f1 | 367 | if (CHECK_FLAG (api->flags, ZEBRA_FLAG_BLACKHOLE)) |
368 | { | |
369 | stream_putc (s, 1); | |
370 | stream_putc (s, ZEBRA_NEXTHOP_BLACKHOLE); | |
0a589359 | 371 | /* XXX assert(api->nexthop_num == 0); */ |
372 | /* XXX assert(api->ifindex_num == 0); */ | |
595db7f1 | 373 | } |
374 | else | |
375 | stream_putc (s, api->nexthop_num + api->ifindex_num); | |
718e3744 | 376 | |
377 | for (i = 0; i < api->nexthop_num; i++) | |
595db7f1 | 378 | { |
379 | stream_putc (s, ZEBRA_NEXTHOP_IPV4); | |
380 | stream_put_in_addr (s, api->nexthop[i]); | |
381 | } | |
718e3744 | 382 | for (i = 0; i < api->ifindex_num; i++) |
595db7f1 | 383 | { |
384 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
385 | stream_putl (s, api->ifindex[i]); | |
386 | } | |
718e3744 | 387 | } |
388 | ||
389 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) | |
390 | stream_putc (s, api->distance); | |
391 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) | |
392 | stream_putl (s, api->metric); | |
393 | ||
394 | /* Put length at the first point of the stream. */ | |
395 | stream_putw_at (s, 0, stream_get_endp (s)); | |
396 | ||
397 | return writen (zclient->sock, s->data, stream_get_endp (s)); | |
398 | } | |
399 | ||
400 | #ifdef HAVE_IPV6 | |
401 | int | |
0a589359 | 402 | zapi_ipv6_route (u_char cmd, struct zclient *zclient, struct prefix_ipv6 *p, |
718e3744 | 403 | struct zapi_ipv6 *api) |
404 | { | |
405 | int i; | |
406 | int psize; | |
407 | struct stream *s; | |
408 | ||
409 | /* Reset stream. */ | |
410 | s = zclient->obuf; | |
411 | stream_reset (s); | |
412 | ||
413 | /* Length place holder. */ | |
414 | stream_putw (s, 0); | |
415 | ||
416 | /* Put command, type and nexthop. */ | |
0a589359 | 417 | stream_putc (s, cmd); |
718e3744 | 418 | stream_putc (s, api->type); |
419 | stream_putc (s, api->flags); | |
420 | stream_putc (s, api->message); | |
421 | ||
422 | /* Put prefix information. */ | |
423 | psize = PSIZE (p->prefixlen); | |
424 | stream_putc (s, p->prefixlen); | |
425 | stream_write (s, (u_char *)&p->prefix, psize); | |
426 | ||
427 | /* Nexthop, ifindex, distance and metric information. */ | |
428 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) | |
429 | { | |
430 | stream_putc (s, api->nexthop_num + api->ifindex_num); | |
431 | ||
432 | for (i = 0; i < api->nexthop_num; i++) | |
433 | { | |
434 | stream_putc (s, ZEBRA_NEXTHOP_IPV6); | |
435 | stream_write (s, (u_char *)api->nexthop[i], 16); | |
436 | } | |
437 | for (i = 0; i < api->ifindex_num; i++) | |
438 | { | |
439 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
440 | stream_putl (s, api->ifindex[i]); | |
441 | } | |
442 | } | |
443 | ||
444 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) | |
445 | stream_putc (s, api->distance); | |
446 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) | |
447 | stream_putl (s, api->metric); | |
448 | ||
449 | /* Put length at the first point of the stream. */ | |
450 | stream_putw_at (s, 0, stream_get_endp (s)); | |
451 | ||
452 | return writen (zclient->sock, s->data, stream_get_endp (s)); | |
453 | } | |
718e3744 | 454 | #endif /* HAVE_IPV6 */ |
455 | ||
0a589359 | 456 | /* |
457 | * send a ZEBRA_REDISTRIBUTE_ADD or ZEBRA_REDISTRIBUTE_DELETE | |
458 | * for the route type (ZEBRA_ROUTE_KERNEL etc.). The zebra server will | |
459 | * then set/unset redist[type] in the client handle (a struct zserv) for the | |
460 | * sending client | |
461 | */ | |
718e3744 | 462 | int |
463 | zebra_redistribute_send (int command, int sock, int type) | |
464 | { | |
465 | int ret; | |
466 | struct stream *s; | |
467 | ||
468 | s = stream_new (ZEBRA_MAX_PACKET_SIZ); | |
469 | ||
470 | /* Total length of the messages. */ | |
471 | stream_putw (s, 4); | |
472 | ||
473 | stream_putc (s, command); | |
474 | stream_putc (s, type); | |
475 | ||
476 | ret = writen (sock, s->data, 4); | |
477 | ||
478 | stream_free (s); | |
479 | ||
480 | return ret; | |
481 | } | |
482 | ||
18a6dce6 | 483 | /* Router-id update from zebra daemon. */ |
484 | void | |
485 | zebra_router_id_update_read (struct stream *s, struct prefix *rid) | |
486 | { | |
487 | int plen; | |
488 | ||
489 | /* Fetch interface address. */ | |
490 | rid->family = stream_getc (s); | |
491 | ||
492 | plen = prefix_blen (rid); | |
493 | stream_get (&rid->u.prefix, s, plen); | |
494 | rid->prefixlen = stream_getc (s); | |
495 | } | |
496 | ||
718e3744 | 497 | /* Interface addition from zebra daemon. */ |
0a589359 | 498 | /* |
499 | * The format of the message sent with type ZEBRA_INTERFACE_ADD or | |
500 | * ZEBRA_INTERFACE_DELETE from zebra to the client is: | |
501 | * 0 1 2 3 | |
502 | * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 | |
503 | * +-+-+-+-+-+-+-+-+ | |
504 | * | type | | |
505 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
506 | * | ifname | | |
507 | * | | | |
508 | * | | | |
509 | * | | | |
510 | * | | | |
511 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
512 | * | ifindex | | |
513 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
514 | * | if_flags | | |
515 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
516 | * | metric | | |
517 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
518 | * | ifmtu | | |
519 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
520 | * | ifmtu6 | | |
521 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
522 | * | bandwidth | | |
523 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
524 | * | sockaddr_dl | | |
525 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
526 | */ | |
527 | ||
718e3744 | 528 | struct interface * |
529 | zebra_interface_add_read (struct stream *s) | |
530 | { | |
531 | struct interface *ifp; | |
02ff83c5 | 532 | char ifname_tmp[INTERFACE_NAMSIZ]; |
718e3744 | 533 | |
534 | /* Read interface name. */ | |
535 | stream_get (ifname_tmp, s, INTERFACE_NAMSIZ); | |
536 | ||
537 | /* Lookup this by interface name. */ | |
538 | ifp = if_lookup_by_name (ifname_tmp); | |
539 | ||
540 | /* If such interface does not exist, make new one. */ | |
541 | if (! ifp) | |
106d2fd5 | 542 | ifp = if_create (ifname_tmp, INTERFACE_NAMSIZ); |
718e3744 | 543 | |
544 | /* Read interface's index. */ | |
545 | ifp->ifindex = stream_getl (s); | |
546 | ||
547 | /* Read interface's value. */ | |
2e3b2e47 | 548 | ifp->status = stream_getc (s); |
718e3744 | 549 | ifp->flags = stream_getl (s); |
550 | ifp->metric = stream_getl (s); | |
551 | ifp->mtu = stream_getl (s); | |
0a589359 | 552 | ifp->mtu6 = stream_getl (s); |
718e3744 | 553 | ifp->bandwidth = stream_getl (s); |
554 | #ifdef HAVE_SOCKADDR_DL | |
555 | stream_get (&ifp->sdl, s, sizeof (ifp->sdl)); | |
556 | #else | |
557 | ifp->hw_addr_len = stream_getl (s); | |
558 | if (ifp->hw_addr_len) | |
559 | stream_get (ifp->hw_addr, s, ifp->hw_addr_len); | |
560 | #endif /* HAVE_SOCKADDR_DL */ | |
561 | ||
562 | return ifp; | |
563 | } | |
564 | ||
0a589359 | 565 | /* |
566 | * Read interface up/down msg (ZEBRA_INTERFACE_UP/ZEBRA_INTERFACE_DOWN) | |
567 | * from zebra server. The format of this message is the same as | |
568 | * that sent for ZEBRA_INTERFACE_ADD/ZEBRA_INTERFACE_DELETE (see | |
569 | * comments for zebra_interface_add_read), except that no sockaddr_dl | |
570 | * is sent at the tail of the message. | |
571 | */ | |
718e3744 | 572 | struct interface * |
573 | zebra_interface_state_read (struct stream *s) | |
574 | { | |
575 | struct interface *ifp; | |
02ff83c5 | 576 | char ifname_tmp[INTERFACE_NAMSIZ]; |
718e3744 | 577 | |
578 | /* Read interface name. */ | |
579 | stream_get (ifname_tmp, s, INTERFACE_NAMSIZ); | |
580 | ||
581 | /* Lookup this by interface index. */ | |
582 | ifp = if_lookup_by_name (ifname_tmp); | |
583 | ||
584 | /* If such interface does not exist, indicate an error */ | |
585 | if (! ifp) | |
586 | return NULL; | |
587 | ||
588 | /* Read interface's index. */ | |
589 | ifp->ifindex = stream_getl (s); | |
590 | ||
591 | /* Read interface's value. */ | |
2e3b2e47 | 592 | ifp->status = stream_getc (s); |
718e3744 | 593 | ifp->flags = stream_getl (s); |
594 | ifp->metric = stream_getl (s); | |
595 | ifp->mtu = stream_getl (s); | |
0a589359 | 596 | ifp->mtu6 = stream_getl (s); |
718e3744 | 597 | ifp->bandwidth = stream_getl (s); |
598 | ||
599 | return ifp; | |
600 | } | |
601 | ||
0a589359 | 602 | /* |
603 | * format of message for address additon is: | |
604 | * 0 | |
605 | * 0 1 2 3 4 5 6 7 | |
606 | * +-+-+-+-+-+-+-+-+ | |
607 | * | type | ZEBRA_INTERFACE_ADDRESS_ADD or | |
608 | * +-+-+-+-+-+-+-+-+ ZEBRA_INTERFACE_ADDRES_DELETE | |
609 | * | | | |
610 | * + + | |
611 | * | ifindex | | |
612 | * + + | |
613 | * | | | |
614 | * + + | |
615 | * | | | |
616 | * +-+-+-+-+-+-+-+-+ | |
617 | * | ifc_flags | flags for connected address | |
618 | * +-+-+-+-+-+-+-+-+ | |
619 | * | addr_family | | |
620 | * +-+-+-+-+-+-+-+-+ | |
621 | * | addr... | | |
622 | * : : | |
623 | * | | | |
624 | * +-+-+-+-+-+-+-+-+ | |
625 | * | addr_len | len of addr. E.g., addr_len = 4 for ipv4 addrs. | |
626 | * +-+-+-+-+-+-+-+-+ | |
627 | * | daddr.. | | |
628 | * : : | |
629 | * | | | |
630 | * +-+-+-+-+-+-+-+-+ | |
631 | * | |
632 | */ | |
633 | ||
18a6dce6 | 634 | void |
635 | zebra_interface_if_set_value (struct stream *s, struct interface *ifp) | |
636 | { | |
637 | /* Read interface's index. */ | |
638 | ifp->ifindex = stream_getl (s); | |
508ec910 | 639 | ifp->status = stream_getc (s); |
18a6dce6 | 640 | |
641 | /* Read interface's value. */ | |
642 | ifp->flags = stream_getl (s); | |
643 | ifp->metric = stream_getl (s); | |
644 | ifp->mtu = stream_getl (s); | |
508ec910 | 645 | ifp->mtu6 = stream_getl (s); |
18a6dce6 | 646 | ifp->bandwidth = stream_getl (s); |
647 | } | |
648 | ||
3fb9cd6e | 649 | static int |
650 | memconstant(const void *s, int c, size_t n) | |
651 | { | |
652 | const u_char *p = s; | |
653 | ||
654 | while (n-- > 0) | |
655 | if (*p++ != c) | |
656 | return 0; | |
657 | return 1; | |
658 | } | |
659 | ||
718e3744 | 660 | struct connected * |
0a589359 | 661 | zebra_interface_address_read (int type, struct stream *s) |
718e3744 | 662 | { |
663 | unsigned int ifindex; | |
664 | struct interface *ifp; | |
665 | struct connected *ifc; | |
0a589359 | 666 | struct prefix p, d; |
718e3744 | 667 | int family; |
668 | int plen; | |
0a589359 | 669 | u_char ifc_flags; |
718e3744 | 670 | |
0a589359 | 671 | memset (&p, 0, sizeof(p)); |
672 | memset (&d, 0, sizeof(d)); | |
718e3744 | 673 | |
674 | /* Get interface index. */ | |
675 | ifindex = stream_getl (s); | |
676 | ||
677 | /* Lookup index. */ | |
678 | ifp = if_lookup_by_index (ifindex); | |
679 | if (ifp == NULL) | |
680 | { | |
0a589359 | 681 | zlog_warn ("zebra_interface_address_read(%s): " |
682 | "Can't find interface by ifindex: %d ", | |
683 | (type == ZEBRA_INTERFACE_ADDRESS_ADD? "ADD" : "DELETE"), | |
684 | ifindex); | |
718e3744 | 685 | return NULL; |
686 | } | |
687 | ||
688 | /* Fetch flag. */ | |
0a589359 | 689 | ifc_flags = stream_getc (s); |
718e3744 | 690 | |
691 | /* Fetch interface address. */ | |
692 | family = p.family = stream_getc (s); | |
693 | ||
0a589359 | 694 | plen = prefix_blen (&p); |
695 | stream_get (&p.u.prefix, s, plen); | |
718e3744 | 696 | p.prefixlen = stream_getc (s); |
697 | ||
698 | /* Fetch destination address. */ | |
0a589359 | 699 | stream_get (&d.u.prefix, s, plen); |
718e3744 | 700 | d.family = family; |
701 | ||
0a589359 | 702 | if (type == ZEBRA_INTERFACE_ADDRESS_ADD) |
703 | { | |
3fb9cd6e | 704 | /* N.B. NULL destination pointers are encoded as all zeroes */ |
705 | ifc = connected_add_by_prefix(ifp, &p,(memconstant(&d.u.prefix,0,plen) ? | |
706 | NULL : &d)); | |
0a589359 | 707 | if (ifc != NULL) |
708 | ifc->flags = ifc_flags; | |
709 | } | |
710 | else | |
711 | { | |
712 | assert (type == ZEBRA_INTERFACE_ADDRESS_DELETE); | |
713 | ifc = connected_delete_by_prefix(ifp, &p); | |
714 | } | |
718e3744 | 715 | |
716 | return ifc; | |
717 | } | |
0a589359 | 718 | |
718e3744 | 719 | \f |
720 | /* Zebra client message read function. */ | |
721 | int | |
722 | zclient_read (struct thread *thread) | |
723 | { | |
724 | int ret; | |
725 | int nbytes; | |
726 | int sock; | |
727 | zebra_size_t length; | |
728 | zebra_command_t command; | |
729 | struct zclient *zclient; | |
730 | ||
731 | /* Get socket to zebra. */ | |
732 | sock = THREAD_FD (thread); | |
733 | zclient = THREAD_ARG (thread); | |
734 | zclient->t_read = NULL; | |
735 | ||
736 | /* Clear input buffer. */ | |
737 | stream_reset (zclient->ibuf); | |
738 | ||
739 | /* Read zebra header. */ | |
740 | nbytes = stream_read (zclient->ibuf, sock, ZEBRA_HEADER_SIZE); | |
741 | ||
742 | /* zebra socket is closed. */ | |
743 | if (nbytes == 0) | |
744 | { | |
745 | if (zclient_debug) | |
8ddca704 | 746 | zlog_debug ("zclient connection closed socket [%d].", sock); |
718e3744 | 747 | zclient->fail++; |
748 | zclient_stop (zclient); | |
749 | zclient_event (ZCLIENT_CONNECT, zclient); | |
750 | return -1; | |
751 | } | |
752 | ||
753 | /* zebra read error. */ | |
754 | if (nbytes < 0 || nbytes != ZEBRA_HEADER_SIZE) | |
755 | { | |
756 | if (zclient_debug) | |
8ddca704 | 757 | zlog_debug ("Can't read all packet (length %d).", nbytes); |
718e3744 | 758 | zclient->fail++; |
759 | zclient_stop (zclient); | |
760 | zclient_event (ZCLIENT_CONNECT, zclient); | |
761 | return -1; | |
762 | } | |
763 | ||
764 | /* Fetch length and command. */ | |
765 | length = stream_getw (zclient->ibuf); | |
766 | command = stream_getc (zclient->ibuf); | |
767 | ||
768 | /* Length check. */ | |
769 | if (length >= zclient->ibuf->size) | |
770 | { | |
771 | stream_free (zclient->ibuf); | |
772 | zclient->ibuf = stream_new (length + 1); | |
773 | } | |
774 | length -= ZEBRA_HEADER_SIZE; | |
775 | ||
776 | /* Read rest of zebra packet. */ | |
777 | nbytes = stream_read (zclient->ibuf, sock, length); | |
778 | if (nbytes != length) | |
779 | { | |
780 | if (zclient_debug) | |
8ddca704 | 781 | zlog_debug ("zclient connection closed socket [%d].", sock); |
718e3744 | 782 | zclient->fail++; |
783 | zclient_stop (zclient); | |
784 | zclient_event (ZCLIENT_CONNECT, zclient); | |
785 | return -1; | |
786 | } | |
787 | ||
0a589359 | 788 | if (zclient_debug) |
8ddca704 | 789 | zlog_debug("zclient 0x%p command 0x%x \n", zclient, command); |
0a589359 | 790 | |
718e3744 | 791 | switch (command) |
792 | { | |
18a6dce6 | 793 | case ZEBRA_ROUTER_ID_UPDATE: |
794 | if (zclient->router_id_update) | |
795 | ret = (*zclient->router_id_update) (command, zclient, length); | |
796 | break; | |
718e3744 | 797 | case ZEBRA_INTERFACE_ADD: |
798 | if (zclient->interface_add) | |
799 | ret = (*zclient->interface_add) (command, zclient, length); | |
800 | break; | |
801 | case ZEBRA_INTERFACE_DELETE: | |
802 | if (zclient->interface_delete) | |
803 | ret = (*zclient->interface_delete) (command, zclient, length); | |
804 | break; | |
805 | case ZEBRA_INTERFACE_ADDRESS_ADD: | |
806 | if (zclient->interface_address_add) | |
807 | ret = (*zclient->interface_address_add) (command, zclient, length); | |
808 | break; | |
809 | case ZEBRA_INTERFACE_ADDRESS_DELETE: | |
810 | if (zclient->interface_address_delete) | |
811 | ret = (*zclient->interface_address_delete) (command, zclient, length); | |
812 | break; | |
813 | case ZEBRA_INTERFACE_UP: | |
814 | if (zclient->interface_up) | |
815 | ret = (*zclient->interface_up) (command, zclient, length); | |
816 | break; | |
817 | case ZEBRA_INTERFACE_DOWN: | |
818 | if (zclient->interface_down) | |
819 | ret = (*zclient->interface_down) (command, zclient, length); | |
820 | break; | |
821 | case ZEBRA_IPV4_ROUTE_ADD: | |
822 | if (zclient->ipv4_route_add) | |
823 | ret = (*zclient->ipv4_route_add) (command, zclient, length); | |
824 | break; | |
825 | case ZEBRA_IPV4_ROUTE_DELETE: | |
826 | if (zclient->ipv4_route_delete) | |
827 | ret = (*zclient->ipv4_route_delete) (command, zclient, length); | |
828 | break; | |
829 | case ZEBRA_IPV6_ROUTE_ADD: | |
830 | if (zclient->ipv6_route_add) | |
831 | ret = (*zclient->ipv6_route_add) (command, zclient, length); | |
832 | break; | |
833 | case ZEBRA_IPV6_ROUTE_DELETE: | |
834 | if (zclient->ipv6_route_delete) | |
835 | ret = (*zclient->ipv6_route_delete) (command, zclient, length); | |
836 | break; | |
837 | default: | |
838 | break; | |
839 | } | |
840 | ||
841 | /* Register read thread. */ | |
842 | zclient_event (ZCLIENT_READ, zclient); | |
843 | ||
844 | return 0; | |
845 | } | |
846 | ||
847 | void | |
0a589359 | 848 | zclient_redistribute (int command, struct zclient *zclient, int type) |
718e3744 | 849 | { |
718e3744 | 850 | |
0a589359 | 851 | if (command == ZEBRA_REDISTRIBUTE_ADD) |
852 | { | |
853 | if (zclient->redist[type]) | |
854 | return; | |
855 | zclient->redist[type] = 1; | |
856 | } | |
857 | else | |
858 | { | |
859 | if (!zclient->redist[type]) | |
860 | return; | |
861 | zclient->redist[type] = 0; | |
862 | } | |
718e3744 | 863 | |
864 | if (zclient->sock > 0) | |
0a589359 | 865 | zebra_redistribute_send (command, zclient->sock, type); |
718e3744 | 866 | } |
867 | ||
718e3744 | 868 | |
869 | void | |
0a589359 | 870 | zclient_redistribute_default (int command, struct zclient *zclient) |
718e3744 | 871 | { |
718e3744 | 872 | |
0a589359 | 873 | if (command == ZEBRA_REDISTRIBUTE_DEFAULT_ADD) |
874 | { | |
875 | if (zclient->default_information) | |
876 | return; | |
877 | zclient->default_information = 1; | |
878 | } | |
879 | else | |
880 | { | |
881 | if (!zclient->default_information) | |
882 | return; | |
883 | zclient->default_information = 0; | |
884 | } | |
718e3744 | 885 | |
886 | if (zclient->sock > 0) | |
0a589359 | 887 | zebra_message_send (zclient, command); |
718e3744 | 888 | } |
889 | ||
718e3744 | 890 | \f |
891 | extern struct thread_master *master; | |
892 | ||
893 | static void | |
894 | zclient_event (enum event event, struct zclient *zclient) | |
895 | { | |
896 | switch (event) | |
897 | { | |
898 | case ZCLIENT_SCHEDULE: | |
899 | if (! zclient->t_connect) | |
900 | zclient->t_connect = | |
901 | thread_add_event (master, zclient_connect, zclient, 0); | |
902 | break; | |
903 | case ZCLIENT_CONNECT: | |
904 | if (zclient->fail >= 10) | |
905 | return; | |
906 | if (zclient_debug) | |
8ddca704 | 907 | zlog_debug ("zclient connect schedule interval is %d", |
718e3744 | 908 | zclient->fail < 3 ? 10 : 60); |
909 | if (! zclient->t_connect) | |
910 | zclient->t_connect = | |
911 | thread_add_timer (master, zclient_connect, zclient, | |
912 | zclient->fail < 3 ? 10 : 60); | |
913 | break; | |
914 | case ZCLIENT_READ: | |
915 | zclient->t_read = | |
916 | thread_add_read (master, zclient_read, zclient, zclient->sock); | |
917 | break; | |
918 | } | |
919 | } |