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718e3744 | 1 | /* Zebra's client library. |
2 | * Copyright (C) 1999 Kunihiro Ishiguro | |
634f9ea2 | 3 | * Copyright (C) 2005 Andrew J. Schorr |
718e3744 | 4 | * |
5 | * This file is part of GNU Zebra. | |
6 | * | |
7 | * GNU Zebra is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published | |
9 | * by the Free Software Foundation; either version 2, or (at your | |
10 | * option) any later version. | |
11 | * | |
12 | * GNU Zebra is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with GNU Zebra; see the file COPYING. If not, write to the | |
19 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
20 | * MA 02111-1307, USA. | |
21 | */ | |
22 | ||
23 | #include <zebra.h> | |
24 | ||
25 | #include "prefix.h" | |
26 | #include "stream.h" | |
634f9ea2 | 27 | #include "buffer.h" |
718e3744 | 28 | #include "network.h" |
29 | #include "if.h" | |
30 | #include "log.h" | |
31 | #include "thread.h" | |
32 | #include "zclient.h" | |
33 | #include "memory.h" | |
34 | #include "table.h" | |
718e3744 | 35 | \f |
36 | /* Zebra client events. */ | |
37 | enum event {ZCLIENT_SCHEDULE, ZCLIENT_READ, ZCLIENT_CONNECT}; | |
38 | ||
39 | /* Prototype for event manager. */ | |
40 | static void zclient_event (enum event, struct zclient *); | |
41 | ||
634f9ea2 | 42 | extern struct thread_master *master; |
43 | ||
b5114685 VT |
44 | char *zclient_serv_path = NULL; |
45 | ||
718e3744 | 46 | /* This file local debug flag. */ |
47 | int zclient_debug = 0; | |
48 | \f | |
49 | /* Allocate zclient structure. */ | |
50 | struct zclient * | |
51 | zclient_new () | |
52 | { | |
53 | struct zclient *zclient; | |
393deb9b | 54 | zclient = XCALLOC (MTYPE_ZCLIENT, sizeof (struct zclient)); |
718e3744 | 55 | |
56 | zclient->ibuf = stream_new (ZEBRA_MAX_PACKET_SIZ); | |
57 | zclient->obuf = stream_new (ZEBRA_MAX_PACKET_SIZ); | |
634f9ea2 | 58 | zclient->wb = buffer_new(0); |
718e3744 | 59 | |
60 | return zclient; | |
61 | } | |
62 | ||
228da428 | 63 | /* This function is only called when exiting, because |
634f9ea2 | 64 | many parts of the code do not check for I/O errors, so they could |
65 | reference an invalid pointer if the structure was ever freed. | |
634f9ea2 | 66 | |
228da428 | 67 | Free zclient structure. */ |
718e3744 | 68 | void |
69 | zclient_free (struct zclient *zclient) | |
70 | { | |
634f9ea2 | 71 | if (zclient->ibuf) |
72 | stream_free(zclient->ibuf); | |
73 | if (zclient->obuf) | |
74 | stream_free(zclient->obuf); | |
75 | if (zclient->wb) | |
76 | buffer_free(zclient->wb); | |
77 | ||
718e3744 | 78 | XFREE (MTYPE_ZCLIENT, zclient); |
79 | } | |
80 | ||
81 | /* Initialize zebra client. Argument redist_default is unwanted | |
82 | redistribute route type. */ | |
83 | void | |
84 | zclient_init (struct zclient *zclient, int redist_default) | |
85 | { | |
86 | int i; | |
87 | ||
88 | /* Enable zebra client connection by default. */ | |
89 | zclient->enable = 1; | |
90 | ||
91 | /* Set -1 to the default socket value. */ | |
92 | zclient->sock = -1; | |
93 | ||
94 | /* Clear redistribution flags. */ | |
95 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
96 | zclient->redist[i] = 0; | |
97 | ||
98 | /* Set unwanted redistribute route. bgpd does not need BGP route | |
99 | redistribution. */ | |
100 | zclient->redist_default = redist_default; | |
101 | zclient->redist[redist_default] = 1; | |
102 | ||
103 | /* Set default-information redistribute to zero. */ | |
104 | zclient->default_information = 0; | |
105 | ||
106 | /* Schedule first zclient connection. */ | |
107 | if (zclient_debug) | |
8ddca704 | 108 | zlog_debug ("zclient start scheduled"); |
718e3744 | 109 | |
110 | zclient_event (ZCLIENT_SCHEDULE, zclient); | |
111 | } | |
112 | ||
113 | /* Stop zebra client services. */ | |
114 | void | |
115 | zclient_stop (struct zclient *zclient) | |
116 | { | |
117 | if (zclient_debug) | |
8ddca704 | 118 | zlog_debug ("zclient stopped"); |
718e3744 | 119 | |
120 | /* Stop threads. */ | |
634f9ea2 | 121 | THREAD_OFF(zclient->t_read); |
122 | THREAD_OFF(zclient->t_connect); | |
123 | THREAD_OFF(zclient->t_write); | |
124 | ||
125 | /* Reset streams. */ | |
126 | stream_reset(zclient->ibuf); | |
127 | stream_reset(zclient->obuf); | |
128 | ||
129 | /* Empty the write buffer. */ | |
130 | buffer_reset(zclient->wb); | |
718e3744 | 131 | |
132 | /* Close socket. */ | |
133 | if (zclient->sock >= 0) | |
134 | { | |
135 | close (zclient->sock); | |
136 | zclient->sock = -1; | |
137 | } | |
138 | zclient->fail = 0; | |
139 | } | |
140 | ||
141 | void | |
142 | zclient_reset (struct zclient *zclient) | |
143 | { | |
144 | zclient_stop (zclient); | |
145 | zclient_init (zclient, zclient->redist_default); | |
146 | } | |
147 | ||
b5114685 VT |
148 | #ifdef HAVE_TCP_ZEBRA |
149 | ||
718e3744 | 150 | /* Make socket to zebra daemon. Return zebra socket. */ |
b5114685 | 151 | static int |
634f9ea2 | 152 | zclient_socket(void) |
718e3744 | 153 | { |
154 | int sock; | |
155 | int ret; | |
156 | struct sockaddr_in serv; | |
157 | ||
158 | /* We should think about IPv6 connection. */ | |
159 | sock = socket (AF_INET, SOCK_STREAM, 0); | |
160 | if (sock < 0) | |
161 | return -1; | |
162 | ||
163 | /* Make server socket. */ | |
164 | memset (&serv, 0, sizeof (struct sockaddr_in)); | |
165 | serv.sin_family = AF_INET; | |
166 | serv.sin_port = htons (ZEBRA_PORT); | |
6f0e3f6e | 167 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
718e3744 | 168 | serv.sin_len = sizeof (struct sockaddr_in); |
6f0e3f6e | 169 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
718e3744 | 170 | serv.sin_addr.s_addr = htonl (INADDR_LOOPBACK); |
171 | ||
172 | /* Connect to zebra. */ | |
173 | ret = connect (sock, (struct sockaddr *) &serv, sizeof (serv)); | |
174 | if (ret < 0) | |
175 | { | |
176 | close (sock); | |
177 | return -1; | |
178 | } | |
179 | return sock; | |
180 | } | |
181 | ||
3414d035 | 182 | #else |
b5114685 | 183 | |
718e3744 | 184 | /* For sockaddr_un. */ |
185 | #include <sys/un.h> | |
186 | ||
b5114685 | 187 | static int |
8c328f11 | 188 | zclient_socket_un (const char *path) |
718e3744 | 189 | { |
190 | int ret; | |
191 | int sock, len; | |
192 | struct sockaddr_un addr; | |
193 | ||
194 | sock = socket (AF_UNIX, SOCK_STREAM, 0); | |
195 | if (sock < 0) | |
196 | return -1; | |
197 | ||
198 | /* Make server socket. */ | |
199 | memset (&addr, 0, sizeof (struct sockaddr_un)); | |
200 | addr.sun_family = AF_UNIX; | |
201 | strncpy (addr.sun_path, path, strlen (path)); | |
6f0e3f6e | 202 | #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN |
718e3744 | 203 | len = addr.sun_len = SUN_LEN(&addr); |
204 | #else | |
205 | len = sizeof (addr.sun_family) + strlen (addr.sun_path); | |
6f0e3f6e | 206 | #endif /* HAVE_STRUCT_SOCKADDR_UN_SUN_LEN */ |
718e3744 | 207 | |
208 | ret = connect (sock, (struct sockaddr *) &addr, len); | |
209 | if (ret < 0) | |
210 | { | |
211 | close (sock); | |
212 | return -1; | |
213 | } | |
214 | return sock; | |
215 | } | |
216 | ||
3414d035 VT |
217 | #endif /* HAVE_TCP_ZEBRA */ |
218 | ||
b5114685 VT |
219 | /** |
220 | * Connect to zebra daemon. | |
221 | * @param zclient a pointer to zclient structure | |
222 | * @return socket fd just to make sure that connection established | |
223 | * @see zclient_init | |
224 | * @see zclient_new | |
225 | */ | |
226 | int | |
227 | zclient_socket_connect (struct zclient *zclient) | |
228 | { | |
229 | #ifdef HAVE_TCP_ZEBRA | |
230 | zclient->sock = zclient_socket (); | |
231 | #else | |
232 | zclient->sock = zclient_socket_un (zclient_serv_path ? zclient_serv_path : ZEBRA_SERV_PATH); | |
233 | #endif | |
234 | return zclient->sock; | |
235 | } | |
236 | ||
634f9ea2 | 237 | static int |
238 | zclient_failed(struct zclient *zclient) | |
239 | { | |
240 | zclient->fail++; | |
241 | zclient_stop(zclient); | |
242 | zclient_event(ZCLIENT_CONNECT, zclient); | |
243 | return -1; | |
244 | } | |
245 | ||
246 | static int | |
247 | zclient_flush_data(struct thread *thread) | |
248 | { | |
249 | struct zclient *zclient = THREAD_ARG(thread); | |
250 | ||
251 | zclient->t_write = NULL; | |
252 | if (zclient->sock < 0) | |
253 | return -1; | |
254 | switch (buffer_flush_available(zclient->wb, zclient->sock)) | |
255 | { | |
256 | case BUFFER_ERROR: | |
257 | zlog_warn("%s: buffer_flush_available failed on zclient fd %d, closing", | |
258 | __func__, zclient->sock); | |
259 | return zclient_failed(zclient); | |
260 | break; | |
261 | case BUFFER_PENDING: | |
262 | zclient->t_write = thread_add_write(master, zclient_flush_data, | |
263 | zclient, zclient->sock); | |
264 | break; | |
265 | case BUFFER_EMPTY: | |
266 | break; | |
267 | } | |
268 | return 0; | |
269 | } | |
270 | ||
718e3744 | 271 | int |
634f9ea2 | 272 | zclient_send_message(struct zclient *zclient) |
273 | { | |
274 | if (zclient->sock < 0) | |
275 | return -1; | |
276 | switch (buffer_write(zclient->wb, zclient->sock, STREAM_DATA(zclient->obuf), | |
277 | stream_get_endp(zclient->obuf))) | |
278 | { | |
279 | case BUFFER_ERROR: | |
280 | zlog_warn("%s: buffer_write failed to zclient fd %d, closing", | |
281 | __func__, zclient->sock); | |
282 | return zclient_failed(zclient); | |
283 | break; | |
284 | case BUFFER_EMPTY: | |
285 | THREAD_OFF(zclient->t_write); | |
286 | break; | |
287 | case BUFFER_PENDING: | |
288 | THREAD_WRITE_ON(master, zclient->t_write, | |
289 | zclient_flush_data, zclient, zclient->sock); | |
290 | break; | |
291 | } | |
292 | return 0; | |
293 | } | |
294 | ||
d211086a | 295 | void |
c1b9800a | 296 | zclient_create_header (struct stream *s, uint16_t command) |
297 | { | |
298 | /* length placeholder, caller can update */ | |
299 | stream_putw (s, ZEBRA_HEADER_SIZE); | |
300 | stream_putc (s, ZEBRA_HEADER_MARKER); | |
301 | stream_putc (s, ZSERV_VERSION); | |
302 | stream_putw (s, command); | |
303 | } | |
304 | ||
634f9ea2 | 305 | /* Send simple Zebra message. */ |
306 | static int | |
718e3744 | 307 | zebra_message_send (struct zclient *zclient, int command) |
308 | { | |
309 | struct stream *s; | |
310 | ||
311 | /* Get zclient output buffer. */ | |
312 | s = zclient->obuf; | |
313 | stream_reset (s); | |
314 | ||
315 | /* Send very simple command only Zebra message. */ | |
c1b9800a | 316 | zclient_create_header (s, command); |
317 | ||
634f9ea2 | 318 | return zclient_send_message(zclient); |
718e3744 | 319 | } |
320 | ||
2ea1ab1c VT |
321 | static int |
322 | zebra_hello_send (struct zclient *zclient) | |
323 | { | |
324 | struct stream *s; | |
325 | ||
326 | if (zclient->redist_default) | |
327 | { | |
328 | s = zclient->obuf; | |
329 | stream_reset (s); | |
330 | ||
331 | zclient_create_header (s, ZEBRA_HELLO); | |
332 | stream_putc (s, zclient->redist_default); | |
333 | stream_putw_at (s, 0, stream_get_endp (s)); | |
334 | return zclient_send_message(zclient); | |
335 | } | |
336 | ||
337 | return 0; | |
338 | } | |
339 | ||
718e3744 | 340 | /* Make connection to zebra daemon. */ |
341 | int | |
342 | zclient_start (struct zclient *zclient) | |
343 | { | |
344 | int i; | |
345 | ||
346 | if (zclient_debug) | |
8ddca704 | 347 | zlog_debug ("zclient_start is called"); |
718e3744 | 348 | |
349 | /* zclient is disabled. */ | |
350 | if (! zclient->enable) | |
351 | return 0; | |
352 | ||
353 | /* If already connected to the zebra. */ | |
354 | if (zclient->sock >= 0) | |
355 | return 0; | |
356 | ||
357 | /* Check connect thread. */ | |
358 | if (zclient->t_connect) | |
359 | return 0; | |
360 | ||
b5114685 | 361 | if (zclient_socket_connect(zclient) < 0) |
718e3744 | 362 | { |
363 | if (zclient_debug) | |
8ddca704 | 364 | zlog_debug ("zclient connection fail"); |
718e3744 | 365 | zclient->fail++; |
366 | zclient_event (ZCLIENT_CONNECT, zclient); | |
367 | return -1; | |
368 | } | |
369 | ||
634f9ea2 | 370 | if (set_nonblocking(zclient->sock) < 0) |
371 | zlog_warn("%s: set_nonblocking(%d) failed", __func__, zclient->sock); | |
372 | ||
718e3744 | 373 | /* Clear fail count. */ |
374 | zclient->fail = 0; | |
375 | if (zclient_debug) | |
8ddca704 | 376 | zlog_debug ("zclient connect success with socket [%d]", zclient->sock); |
718e3744 | 377 | |
378 | /* Create read thread. */ | |
379 | zclient_event (ZCLIENT_READ, zclient); | |
380 | ||
2ea1ab1c VT |
381 | zebra_hello_send (zclient); |
382 | ||
18a6dce6 | 383 | /* We need router-id information. */ |
384 | zebra_message_send (zclient, ZEBRA_ROUTER_ID_ADD); | |
385 | ||
08a7a916 DT |
386 | /* We need interface information. */ |
387 | zebra_message_send (zclient, ZEBRA_INTERFACE_ADD); | |
388 | ||
718e3744 | 389 | /* Flush all redistribute request. */ |
390 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
391 | if (i != zclient->redist_default && zclient->redist[i]) | |
634f9ea2 | 392 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_ADD, zclient, i); |
718e3744 | 393 | |
394 | /* If default information is needed. */ | |
395 | if (zclient->default_information) | |
396 | zebra_message_send (zclient, ZEBRA_REDISTRIBUTE_DEFAULT_ADD); | |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
401 | /* This function is a wrapper function for calling zclient_start from | |
402 | timer or event thread. */ | |
634f9ea2 | 403 | static int |
718e3744 | 404 | zclient_connect (struct thread *t) |
405 | { | |
406 | struct zclient *zclient; | |
407 | ||
408 | zclient = THREAD_ARG (t); | |
409 | zclient->t_connect = NULL; | |
410 | ||
411 | if (zclient_debug) | |
8ddca704 | 412 | zlog_debug ("zclient_connect is called"); |
718e3744 | 413 | |
414 | return zclient_start (zclient); | |
415 | } | |
416 | \f | |
0a589359 | 417 | /* |
418 | * "xdr_encode"-like interface that allows daemon (client) to send | |
419 | * a message to zebra server for a route that needs to be | |
420 | * added/deleted to the kernel. Info about the route is specified | |
421 | * by the caller in a struct zapi_ipv4. zapi_ipv4_read() then writes | |
422 | * the info down the zclient socket using the stream_* functions. | |
423 | * | |
424 | * The corresponding read ("xdr_decode") function on the server | |
425 | * side is zread_ipv4_add()/zread_ipv4_delete(). | |
426 | * | |
427 | * 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 | |
428 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
429 | * | Length (2) | Command | Route Type | | |
430 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
431 | * | ZEBRA Flags | Message Flags | Prefix length | | |
432 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
433 | * | Destination IPv4 Prefix for route | | |
434 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
435 | * | Nexthop count | | |
436 | * +-+-+-+-+-+-+-+-+ | |
437 | * | |
438 | * | |
439 | * A number of IPv4 nexthop(s) or nexthop interface index(es) are then | |
440 | * described, as per the Nexthop count. Each nexthop described as: | |
441 | * | |
442 | * +-+-+-+-+-+-+-+-+ | |
443 | * | Nexthop Type | Set to one of ZEBRA_NEXTHOP_* | |
444 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
445 | * | IPv4 Nexthop address or Interface Index number | | |
446 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
447 | * | |
448 | * Alternatively, if the flags field has ZEBRA_FLAG_BLACKHOLE or | |
449 | * ZEBRA_FLAG_REJECT is set then Nexthop count is set to 1, then _no_ | |
450 | * nexthop information is provided, and the message describes a prefix | |
451 | * to blackhole or reject route. | |
452 | * | |
453 | * If ZAPI_MESSAGE_DISTANCE is set, the distance value is written as a 1 | |
454 | * byte value. | |
455 | * | |
456 | * If ZAPI_MESSAGE_METRIC is set, the metric value is written as an 8 | |
457 | * byte value. | |
458 | * | |
459 | * XXX: No attention paid to alignment. | |
460 | */ | |
718e3744 | 461 | int |
0a589359 | 462 | zapi_ipv4_route (u_char cmd, struct zclient *zclient, struct prefix_ipv4 *p, |
463 | struct zapi_ipv4 *api) | |
718e3744 | 464 | { |
465 | int i; | |
466 | int psize; | |
467 | struct stream *s; | |
468 | ||
469 | /* Reset stream. */ | |
470 | s = zclient->obuf; | |
471 | stream_reset (s); | |
c1b9800a | 472 | |
473 | zclient_create_header (s, cmd); | |
474 | ||
475 | /* Put type and nexthop. */ | |
718e3744 | 476 | stream_putc (s, api->type); |
477 | stream_putc (s, api->flags); | |
478 | stream_putc (s, api->message); | |
718e3744 | 479 | |
718e3744 | 480 | /* Put prefix information. */ |
481 | psize = PSIZE (p->prefixlen); | |
482 | stream_putc (s, p->prefixlen); | |
0a589359 | 483 | stream_write (s, (u_char *) & p->prefix, psize); |
718e3744 | 484 | |
485 | /* Nexthop, ifindex, distance and metric information. */ | |
486 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) | |
487 | { | |
595db7f1 | 488 | if (CHECK_FLAG (api->flags, ZEBRA_FLAG_BLACKHOLE)) |
489 | { | |
490 | stream_putc (s, 1); | |
491 | stream_putc (s, ZEBRA_NEXTHOP_BLACKHOLE); | |
0a589359 | 492 | /* XXX assert(api->nexthop_num == 0); */ |
493 | /* XXX assert(api->ifindex_num == 0); */ | |
595db7f1 | 494 | } |
495 | else | |
496 | stream_putc (s, api->nexthop_num + api->ifindex_num); | |
718e3744 | 497 | |
498 | for (i = 0; i < api->nexthop_num; i++) | |
595db7f1 | 499 | { |
500 | stream_putc (s, ZEBRA_NEXTHOP_IPV4); | |
501 | stream_put_in_addr (s, api->nexthop[i]); | |
502 | } | |
718e3744 | 503 | for (i = 0; i < api->ifindex_num; i++) |
595db7f1 | 504 | { |
505 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
506 | stream_putl (s, api->ifindex[i]); | |
507 | } | |
718e3744 | 508 | } |
509 | ||
510 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) | |
511 | stream_putc (s, api->distance); | |
512 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) | |
513 | stream_putl (s, api->metric); | |
514 | ||
515 | /* Put length at the first point of the stream. */ | |
516 | stream_putw_at (s, 0, stream_get_endp (s)); | |
517 | ||
634f9ea2 | 518 | return zclient_send_message(zclient); |
718e3744 | 519 | } |
520 | ||
521 | #ifdef HAVE_IPV6 | |
522 | int | |
0a589359 | 523 | zapi_ipv6_route (u_char cmd, struct zclient *zclient, struct prefix_ipv6 *p, |
718e3744 | 524 | struct zapi_ipv6 *api) |
525 | { | |
526 | int i; | |
527 | int psize; | |
528 | struct stream *s; | |
529 | ||
530 | /* Reset stream. */ | |
531 | s = zclient->obuf; | |
532 | stream_reset (s); | |
533 | ||
c1b9800a | 534 | zclient_create_header (s, cmd); |
718e3744 | 535 | |
c1b9800a | 536 | /* Put type and nexthop. */ |
718e3744 | 537 | stream_putc (s, api->type); |
538 | stream_putc (s, api->flags); | |
539 | stream_putc (s, api->message); | |
540 | ||
541 | /* Put prefix information. */ | |
542 | psize = PSIZE (p->prefixlen); | |
543 | stream_putc (s, p->prefixlen); | |
544 | stream_write (s, (u_char *)&p->prefix, psize); | |
545 | ||
546 | /* Nexthop, ifindex, distance and metric information. */ | |
547 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) | |
548 | { | |
549 | stream_putc (s, api->nexthop_num + api->ifindex_num); | |
550 | ||
551 | for (i = 0; i < api->nexthop_num; i++) | |
552 | { | |
553 | stream_putc (s, ZEBRA_NEXTHOP_IPV6); | |
554 | stream_write (s, (u_char *)api->nexthop[i], 16); | |
555 | } | |
556 | for (i = 0; i < api->ifindex_num; i++) | |
557 | { | |
558 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
559 | stream_putl (s, api->ifindex[i]); | |
560 | } | |
561 | } | |
562 | ||
563 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) | |
564 | stream_putc (s, api->distance); | |
565 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) | |
566 | stream_putl (s, api->metric); | |
567 | ||
568 | /* Put length at the first point of the stream. */ | |
569 | stream_putw_at (s, 0, stream_get_endp (s)); | |
570 | ||
634f9ea2 | 571 | return zclient_send_message(zclient); |
718e3744 | 572 | } |
718e3744 | 573 | #endif /* HAVE_IPV6 */ |
574 | ||
0a589359 | 575 | /* |
576 | * send a ZEBRA_REDISTRIBUTE_ADD or ZEBRA_REDISTRIBUTE_DELETE | |
577 | * for the route type (ZEBRA_ROUTE_KERNEL etc.). The zebra server will | |
578 | * then set/unset redist[type] in the client handle (a struct zserv) for the | |
579 | * sending client | |
580 | */ | |
718e3744 | 581 | int |
634f9ea2 | 582 | zebra_redistribute_send (int command, struct zclient *zclient, int type) |
718e3744 | 583 | { |
718e3744 | 584 | struct stream *s; |
585 | ||
634f9ea2 | 586 | s = zclient->obuf; |
587 | stream_reset(s); | |
718e3744 | 588 | |
c1b9800a | 589 | zclient_create_header (s, command); |
718e3744 | 590 | stream_putc (s, type); |
c1b9800a | 591 | |
592 | stream_putw_at (s, 0, stream_get_endp (s)); | |
593 | ||
634f9ea2 | 594 | return zclient_send_message(zclient); |
718e3744 | 595 | } |
596 | ||
18a6dce6 | 597 | /* Router-id update from zebra daemon. */ |
598 | void | |
599 | zebra_router_id_update_read (struct stream *s, struct prefix *rid) | |
600 | { | |
601 | int plen; | |
602 | ||
603 | /* Fetch interface address. */ | |
604 | rid->family = stream_getc (s); | |
605 | ||
606 | plen = prefix_blen (rid); | |
607 | stream_get (&rid->u.prefix, s, plen); | |
608 | rid->prefixlen = stream_getc (s); | |
609 | } | |
610 | ||
718e3744 | 611 | /* Interface addition from zebra daemon. */ |
0a589359 | 612 | /* |
613 | * The format of the message sent with type ZEBRA_INTERFACE_ADD or | |
614 | * ZEBRA_INTERFACE_DELETE from zebra to the client is: | |
615 | * 0 1 2 3 | |
616 | * 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 | |
617 | * +-+-+-+-+-+-+-+-+ | |
618 | * | type | | |
619 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
620 | * | ifname | | |
621 | * | | | |
622 | * | | | |
623 | * | | | |
624 | * | | | |
625 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
626 | * | ifindex | | |
627 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
628 | * | if_flags | | |
c77d4546 | 629 | * | | |
0a589359 | 630 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
631 | * | metric | | |
632 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
633 | * | ifmtu | | |
634 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
635 | * | ifmtu6 | | |
636 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
637 | * | bandwidth | | |
638 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
639 | * | sockaddr_dl | | |
640 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
641 | */ | |
642 | ||
718e3744 | 643 | struct interface * |
644 | zebra_interface_add_read (struct stream *s) | |
645 | { | |
646 | struct interface *ifp; | |
02ff83c5 | 647 | char ifname_tmp[INTERFACE_NAMSIZ]; |
718e3744 | 648 | |
649 | /* Read interface name. */ | |
650 | stream_get (ifname_tmp, s, INTERFACE_NAMSIZ); | |
651 | ||
a349198f | 652 | /* Lookup/create interface by name. */ |
653 | ifp = if_get_by_name_len (ifname_tmp, strnlen(ifname_tmp, INTERFACE_NAMSIZ)); | |
718e3744 | 654 | |
655 | /* Read interface's index. */ | |
656 | ifp->ifindex = stream_getl (s); | |
657 | ||
658 | /* Read interface's value. */ | |
2e3b2e47 | 659 | ifp->status = stream_getc (s); |
c77d4546 | 660 | ifp->flags = stream_getq (s); |
718e3744 | 661 | ifp->metric = stream_getl (s); |
662 | ifp->mtu = stream_getl (s); | |
0a589359 | 663 | ifp->mtu6 = stream_getl (s); |
718e3744 | 664 | ifp->bandwidth = stream_getl (s); |
6f0e3f6e | 665 | #ifdef HAVE_STRUCT_SOCKADDR_DL |
718e3744 | 666 | stream_get (&ifp->sdl, s, sizeof (ifp->sdl)); |
667 | #else | |
668 | ifp->hw_addr_len = stream_getl (s); | |
669 | if (ifp->hw_addr_len) | |
670 | stream_get (ifp->hw_addr, s, ifp->hw_addr_len); | |
6f0e3f6e | 671 | #endif /* HAVE_STRUCT_SOCKADDR_DL */ |
718e3744 | 672 | |
673 | return ifp; | |
674 | } | |
675 | ||
0a589359 | 676 | /* |
677 | * Read interface up/down msg (ZEBRA_INTERFACE_UP/ZEBRA_INTERFACE_DOWN) | |
678 | * from zebra server. The format of this message is the same as | |
679 | * that sent for ZEBRA_INTERFACE_ADD/ZEBRA_INTERFACE_DELETE (see | |
680 | * comments for zebra_interface_add_read), except that no sockaddr_dl | |
681 | * is sent at the tail of the message. | |
682 | */ | |
718e3744 | 683 | struct interface * |
684 | zebra_interface_state_read (struct stream *s) | |
685 | { | |
686 | struct interface *ifp; | |
02ff83c5 | 687 | char ifname_tmp[INTERFACE_NAMSIZ]; |
718e3744 | 688 | |
689 | /* Read interface name. */ | |
690 | stream_get (ifname_tmp, s, INTERFACE_NAMSIZ); | |
691 | ||
692 | /* Lookup this by interface index. */ | |
a349198f | 693 | ifp = if_lookup_by_name_len (ifname_tmp, |
694 | strnlen(ifname_tmp, INTERFACE_NAMSIZ)); | |
718e3744 | 695 | |
696 | /* If such interface does not exist, indicate an error */ | |
697 | if (! ifp) | |
698 | return NULL; | |
699 | ||
700 | /* Read interface's index. */ | |
701 | ifp->ifindex = stream_getl (s); | |
702 | ||
703 | /* Read interface's value. */ | |
2e3b2e47 | 704 | ifp->status = stream_getc (s); |
c77d4546 | 705 | ifp->flags = stream_getq (s); |
718e3744 | 706 | ifp->metric = stream_getl (s); |
707 | ifp->mtu = stream_getl (s); | |
0a589359 | 708 | ifp->mtu6 = stream_getl (s); |
718e3744 | 709 | ifp->bandwidth = stream_getl (s); |
710 | ||
711 | return ifp; | |
712 | } | |
713 | ||
0a589359 | 714 | /* |
715 | * format of message for address additon is: | |
716 | * 0 | |
717 | * 0 1 2 3 4 5 6 7 | |
718 | * +-+-+-+-+-+-+-+-+ | |
719 | * | type | ZEBRA_INTERFACE_ADDRESS_ADD or | |
720 | * +-+-+-+-+-+-+-+-+ ZEBRA_INTERFACE_ADDRES_DELETE | |
721 | * | | | |
722 | * + + | |
723 | * | ifindex | | |
724 | * + + | |
725 | * | | | |
726 | * + + | |
727 | * | | | |
728 | * +-+-+-+-+-+-+-+-+ | |
729 | * | ifc_flags | flags for connected address | |
730 | * +-+-+-+-+-+-+-+-+ | |
731 | * | addr_family | | |
732 | * +-+-+-+-+-+-+-+-+ | |
733 | * | addr... | | |
734 | * : : | |
735 | * | | | |
736 | * +-+-+-+-+-+-+-+-+ | |
737 | * | addr_len | len of addr. E.g., addr_len = 4 for ipv4 addrs. | |
738 | * +-+-+-+-+-+-+-+-+ | |
739 | * | daddr.. | | |
740 | * : : | |
741 | * | | | |
742 | * +-+-+-+-+-+-+-+-+ | |
743 | * | |
744 | */ | |
745 | ||
18a6dce6 | 746 | void |
747 | zebra_interface_if_set_value (struct stream *s, struct interface *ifp) | |
748 | { | |
749 | /* Read interface's index. */ | |
750 | ifp->ifindex = stream_getl (s); | |
508ec910 | 751 | ifp->status = stream_getc (s); |
18a6dce6 | 752 | |
753 | /* Read interface's value. */ | |
c77d4546 | 754 | ifp->flags = stream_getq (s); |
18a6dce6 | 755 | ifp->metric = stream_getl (s); |
756 | ifp->mtu = stream_getl (s); | |
508ec910 | 757 | ifp->mtu6 = stream_getl (s); |
18a6dce6 | 758 | ifp->bandwidth = stream_getl (s); |
759 | } | |
760 | ||
3fb9cd6e | 761 | static int |
762 | memconstant(const void *s, int c, size_t n) | |
763 | { | |
764 | const u_char *p = s; | |
765 | ||
766 | while (n-- > 0) | |
767 | if (*p++ != c) | |
768 | return 0; | |
769 | return 1; | |
770 | } | |
771 | ||
718e3744 | 772 | struct connected * |
0a589359 | 773 | zebra_interface_address_read (int type, struct stream *s) |
718e3744 | 774 | { |
775 | unsigned int ifindex; | |
776 | struct interface *ifp; | |
777 | struct connected *ifc; | |
0a589359 | 778 | struct prefix p, d; |
718e3744 | 779 | int family; |
780 | int plen; | |
0a589359 | 781 | u_char ifc_flags; |
718e3744 | 782 | |
0a589359 | 783 | memset (&p, 0, sizeof(p)); |
784 | memset (&d, 0, sizeof(d)); | |
718e3744 | 785 | |
786 | /* Get interface index. */ | |
787 | ifindex = stream_getl (s); | |
788 | ||
789 | /* Lookup index. */ | |
790 | ifp = if_lookup_by_index (ifindex); | |
791 | if (ifp == NULL) | |
792 | { | |
0a589359 | 793 | zlog_warn ("zebra_interface_address_read(%s): " |
794 | "Can't find interface by ifindex: %d ", | |
795 | (type == ZEBRA_INTERFACE_ADDRESS_ADD? "ADD" : "DELETE"), | |
796 | ifindex); | |
718e3744 | 797 | return NULL; |
798 | } | |
799 | ||
800 | /* Fetch flag. */ | |
0a589359 | 801 | ifc_flags = stream_getc (s); |
718e3744 | 802 | |
803 | /* Fetch interface address. */ | |
804 | family = p.family = stream_getc (s); | |
805 | ||
0a589359 | 806 | plen = prefix_blen (&p); |
807 | stream_get (&p.u.prefix, s, plen); | |
718e3744 | 808 | p.prefixlen = stream_getc (s); |
809 | ||
810 | /* Fetch destination address. */ | |
0a589359 | 811 | stream_get (&d.u.prefix, s, plen); |
718e3744 | 812 | d.family = family; |
813 | ||
0a589359 | 814 | if (type == ZEBRA_INTERFACE_ADDRESS_ADD) |
815 | { | |
3fb9cd6e | 816 | /* N.B. NULL destination pointers are encoded as all zeroes */ |
817 | ifc = connected_add_by_prefix(ifp, &p,(memconstant(&d.u.prefix,0,plen) ? | |
818 | NULL : &d)); | |
0a589359 | 819 | if (ifc != NULL) |
e4529636 AS |
820 | { |
821 | ifc->flags = ifc_flags; | |
822 | if (ifc->destination) | |
823 | ifc->destination->prefixlen = ifc->address->prefixlen; | |
824 | } | |
0a589359 | 825 | } |
826 | else | |
827 | { | |
828 | assert (type == ZEBRA_INTERFACE_ADDRESS_DELETE); | |
829 | ifc = connected_delete_by_prefix(ifp, &p); | |
830 | } | |
718e3744 | 831 | |
832 | return ifc; | |
833 | } | |
0a589359 | 834 | |
718e3744 | 835 | \f |
836 | /* Zebra client message read function. */ | |
634f9ea2 | 837 | static int |
718e3744 | 838 | zclient_read (struct thread *thread) |
839 | { | |
634f9ea2 | 840 | size_t already; |
c1b9800a | 841 | uint16_t length, command; |
842 | uint8_t marker, version; | |
718e3744 | 843 | struct zclient *zclient; |
844 | ||
845 | /* Get socket to zebra. */ | |
718e3744 | 846 | zclient = THREAD_ARG (thread); |
847 | zclient->t_read = NULL; | |
848 | ||
634f9ea2 | 849 | /* Read zebra header (if we don't have it already). */ |
850 | if ((already = stream_get_endp(zclient->ibuf)) < ZEBRA_HEADER_SIZE) | |
718e3744 | 851 | { |
634f9ea2 | 852 | ssize_t nbyte; |
853 | if (((nbyte = stream_read_try(zclient->ibuf, zclient->sock, | |
854 | ZEBRA_HEADER_SIZE-already)) == 0) || | |
855 | (nbyte == -1)) | |
856 | { | |
857 | if (zclient_debug) | |
858 | zlog_debug ("zclient connection closed socket [%d].", zclient->sock); | |
859 | return zclient_failed(zclient); | |
860 | } | |
861 | if (nbyte != (ssize_t)(ZEBRA_HEADER_SIZE-already)) | |
862 | { | |
863 | /* Try again later. */ | |
864 | zclient_event (ZCLIENT_READ, zclient); | |
865 | return 0; | |
866 | } | |
867 | already = ZEBRA_HEADER_SIZE; | |
718e3744 | 868 | } |
869 | ||
634f9ea2 | 870 | /* Reset to read from the beginning of the incoming packet. */ |
871 | stream_set_getp(zclient->ibuf, 0); | |
718e3744 | 872 | |
c1b9800a | 873 | /* Fetch header values. */ |
718e3744 | 874 | length = stream_getw (zclient->ibuf); |
c1b9800a | 875 | marker = stream_getc (zclient->ibuf); |
876 | version = stream_getc (zclient->ibuf); | |
877 | command = stream_getw (zclient->ibuf); | |
878 | ||
879 | if (marker != ZEBRA_HEADER_MARKER || version != ZSERV_VERSION) | |
880 | { | |
881 | zlog_err("%s: socket %d version mismatch, marker %d, version %d", | |
882 | __func__, zclient->sock, marker, version); | |
883 | return zclient_failed(zclient); | |
884 | } | |
885 | ||
634f9ea2 | 886 | if (length < ZEBRA_HEADER_SIZE) |
887 | { | |
888 | zlog_err("%s: socket %d message length %u is less than %d ", | |
889 | __func__, zclient->sock, length, ZEBRA_HEADER_SIZE); | |
890 | return zclient_failed(zclient); | |
891 | } | |
892 | ||
718e3744 | 893 | /* Length check. */ |
634f9ea2 | 894 | if (length > STREAM_SIZE(zclient->ibuf)) |
718e3744 | 895 | { |
634f9ea2 | 896 | struct stream *ns; |
897 | zlog_warn("%s: message size %u exceeds buffer size %lu, expanding...", | |
898 | __func__, length, (u_long)STREAM_SIZE(zclient->ibuf)); | |
899 | ns = stream_new(length); | |
900 | stream_copy(ns, zclient->ibuf); | |
718e3744 | 901 | stream_free (zclient->ibuf); |
634f9ea2 | 902 | zclient->ibuf = ns; |
718e3744 | 903 | } |
718e3744 | 904 | |
905 | /* Read rest of zebra packet. */ | |
634f9ea2 | 906 | if (already < length) |
907 | { | |
908 | ssize_t nbyte; | |
909 | if (((nbyte = stream_read_try(zclient->ibuf, zclient->sock, | |
910 | length-already)) == 0) || | |
911 | (nbyte == -1)) | |
912 | { | |
913 | if (zclient_debug) | |
914 | zlog_debug("zclient connection closed socket [%d].", zclient->sock); | |
915 | return zclient_failed(zclient); | |
916 | } | |
917 | if (nbyte != (ssize_t)(length-already)) | |
918 | { | |
919 | /* Try again later. */ | |
920 | zclient_event (ZCLIENT_READ, zclient); | |
921 | return 0; | |
922 | } | |
923 | } | |
924 | ||
925 | length -= ZEBRA_HEADER_SIZE; | |
718e3744 | 926 | |
0a589359 | 927 | if (zclient_debug) |
8ddca704 | 928 | zlog_debug("zclient 0x%p command 0x%x \n", zclient, command); |
0a589359 | 929 | |
718e3744 | 930 | switch (command) |
931 | { | |
18a6dce6 | 932 | case ZEBRA_ROUTER_ID_UPDATE: |
933 | if (zclient->router_id_update) | |
9206f9ec | 934 | (*zclient->router_id_update) (command, zclient, length); |
18a6dce6 | 935 | break; |
718e3744 | 936 | case ZEBRA_INTERFACE_ADD: |
937 | if (zclient->interface_add) | |
9206f9ec | 938 | (*zclient->interface_add) (command, zclient, length); |
718e3744 | 939 | break; |
940 | case ZEBRA_INTERFACE_DELETE: | |
941 | if (zclient->interface_delete) | |
9206f9ec | 942 | (*zclient->interface_delete) (command, zclient, length); |
718e3744 | 943 | break; |
944 | case ZEBRA_INTERFACE_ADDRESS_ADD: | |
945 | if (zclient->interface_address_add) | |
9206f9ec | 946 | (*zclient->interface_address_add) (command, zclient, length); |
718e3744 | 947 | break; |
948 | case ZEBRA_INTERFACE_ADDRESS_DELETE: | |
949 | if (zclient->interface_address_delete) | |
9206f9ec | 950 | (*zclient->interface_address_delete) (command, zclient, length); |
718e3744 | 951 | break; |
952 | case ZEBRA_INTERFACE_UP: | |
953 | if (zclient->interface_up) | |
9206f9ec | 954 | (*zclient->interface_up) (command, zclient, length); |
718e3744 | 955 | break; |
956 | case ZEBRA_INTERFACE_DOWN: | |
957 | if (zclient->interface_down) | |
9206f9ec | 958 | (*zclient->interface_down) (command, zclient, length); |
718e3744 | 959 | break; |
960 | case ZEBRA_IPV4_ROUTE_ADD: | |
961 | if (zclient->ipv4_route_add) | |
9206f9ec | 962 | (*zclient->ipv4_route_add) (command, zclient, length); |
718e3744 | 963 | break; |
964 | case ZEBRA_IPV4_ROUTE_DELETE: | |
965 | if (zclient->ipv4_route_delete) | |
9206f9ec | 966 | (*zclient->ipv4_route_delete) (command, zclient, length); |
718e3744 | 967 | break; |
968 | case ZEBRA_IPV6_ROUTE_ADD: | |
969 | if (zclient->ipv6_route_add) | |
9206f9ec | 970 | (*zclient->ipv6_route_add) (command, zclient, length); |
718e3744 | 971 | break; |
972 | case ZEBRA_IPV6_ROUTE_DELETE: | |
973 | if (zclient->ipv6_route_delete) | |
9206f9ec | 974 | (*zclient->ipv6_route_delete) (command, zclient, length); |
718e3744 | 975 | break; |
976 | default: | |
977 | break; | |
978 | } | |
979 | ||
634f9ea2 | 980 | if (zclient->sock < 0) |
981 | /* Connection was closed during packet processing. */ | |
982 | return -1; | |
983 | ||
718e3744 | 984 | /* Register read thread. */ |
634f9ea2 | 985 | stream_reset(zclient->ibuf); |
718e3744 | 986 | zclient_event (ZCLIENT_READ, zclient); |
987 | ||
988 | return 0; | |
989 | } | |
990 | ||
991 | void | |
0a589359 | 992 | zclient_redistribute (int command, struct zclient *zclient, int type) |
718e3744 | 993 | { |
718e3744 | 994 | |
0a589359 | 995 | if (command == ZEBRA_REDISTRIBUTE_ADD) |
996 | { | |
997 | if (zclient->redist[type]) | |
998 | return; | |
999 | zclient->redist[type] = 1; | |
1000 | } | |
1001 | else | |
1002 | { | |
1003 | if (!zclient->redist[type]) | |
1004 | return; | |
1005 | zclient->redist[type] = 0; | |
1006 | } | |
718e3744 | 1007 | |
1008 | if (zclient->sock > 0) | |
634f9ea2 | 1009 | zebra_redistribute_send (command, zclient, type); |
718e3744 | 1010 | } |
1011 | ||
718e3744 | 1012 | |
1013 | void | |
0a589359 | 1014 | zclient_redistribute_default (int command, struct zclient *zclient) |
718e3744 | 1015 | { |
718e3744 | 1016 | |
0a589359 | 1017 | if (command == ZEBRA_REDISTRIBUTE_DEFAULT_ADD) |
1018 | { | |
1019 | if (zclient->default_information) | |
1020 | return; | |
1021 | zclient->default_information = 1; | |
1022 | } | |
1023 | else | |
1024 | { | |
1025 | if (!zclient->default_information) | |
1026 | return; | |
1027 | zclient->default_information = 0; | |
1028 | } | |
718e3744 | 1029 | |
1030 | if (zclient->sock > 0) | |
0a589359 | 1031 | zebra_message_send (zclient, command); |
718e3744 | 1032 | } |
1033 | ||
718e3744 | 1034 | static void |
1035 | zclient_event (enum event event, struct zclient *zclient) | |
1036 | { | |
1037 | switch (event) | |
1038 | { | |
1039 | case ZCLIENT_SCHEDULE: | |
1040 | if (! zclient->t_connect) | |
1041 | zclient->t_connect = | |
1042 | thread_add_event (master, zclient_connect, zclient, 0); | |
1043 | break; | |
1044 | case ZCLIENT_CONNECT: | |
1045 | if (zclient->fail >= 10) | |
1046 | return; | |
1047 | if (zclient_debug) | |
8ddca704 | 1048 | zlog_debug ("zclient connect schedule interval is %d", |
718e3744 | 1049 | zclient->fail < 3 ? 10 : 60); |
1050 | if (! zclient->t_connect) | |
1051 | zclient->t_connect = | |
1052 | thread_add_timer (master, zclient_connect, zclient, | |
1053 | zclient->fail < 3 ? 10 : 60); | |
1054 | break; | |
1055 | case ZCLIENT_READ: | |
1056 | zclient->t_read = | |
1057 | thread_add_read (master, zclient_read, zclient, zclient->sock); | |
1058 | break; | |
1059 | } | |
1060 | } | |
b5114685 VT |
1061 | |
1062 | void | |
1063 | zclient_serv_path_set (char *path) | |
1064 | { | |
1065 | struct stat sb; | |
1066 | ||
1067 | /* reset */ | |
1068 | zclient_serv_path = NULL; | |
1069 | ||
1070 | /* test if `path' is socket. don't set it otherwise. */ | |
1071 | if (stat(path, &sb) == -1) | |
1072 | { | |
1073 | zlog_warn ("%s: zebra socket `%s' does not exist", __func__, path); | |
1074 | return; | |
1075 | } | |
1076 | ||
1077 | if ((sb.st_mode & S_IFMT) != S_IFSOCK) | |
1078 | { | |
1079 | zlog_warn ("%s: `%s' is not unix socket, sir", __func__, path); | |
1080 | return; | |
1081 | } | |
1082 | ||
1083 | /* it seems that path is unix socket */ | |
1084 | zclient_serv_path = path; | |
1085 | } | |
1086 |