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