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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" | |
6b0655a2 | 35 | |
718e3744 | 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; | |
6b0655a2 | 48 | |
718e3744 | 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 | ||
7c8ff89e DS |
81 | int |
82 | redist_check_instance (struct redist_proto *red, u_short instance) | |
83 | { | |
84 | struct listnode *node; | |
85 | u_short *id; | |
86 | ||
87 | if (!red->instances) | |
88 | return 0; | |
89 | ||
90 | for (ALL_LIST_ELEMENTS_RO (red->instances, node, id)) | |
91 | if (*id == instance) | |
92 | return 1; | |
93 | ||
94 | return 0; | |
95 | } | |
96 | ||
97 | void | |
98 | redist_add_instance (struct redist_proto *red, u_short instance) | |
99 | { | |
100 | u_short *in; | |
101 | ||
102 | red->enabled = 1; | |
103 | ||
104 | if (!red->instances) | |
105 | red->instances = list_new(); | |
106 | ||
107 | in = (u_short *)calloc(1, sizeof(u_short)); | |
108 | *in = instance; | |
109 | listnode_add (red->instances, in); | |
110 | } | |
111 | ||
112 | void | |
113 | redist_del_instance (struct redist_proto *red, u_short instance) | |
114 | { | |
115 | struct listnode *node; | |
116 | u_short *id = NULL; | |
117 | ||
118 | if (!red->instances) | |
119 | return 0; | |
120 | ||
121 | for (ALL_LIST_ELEMENTS_RO (red->instances, node, id)) | |
122 | if (*id == instance) | |
123 | break; | |
124 | ||
125 | if (id) | |
126 | { | |
127 | listnode_delete(red->instances, id); | |
128 | if (!red->instances->count) | |
129 | { | |
130 | red->enabled = 0; | |
131 | list_free(red->instances); | |
132 | red->instances = NULL; | |
133 | } | |
134 | } | |
135 | } | |
136 | ||
718e3744 | 137 | /* Initialize zebra client. Argument redist_default is unwanted |
138 | redistribute route type. */ | |
139 | void | |
7c8ff89e | 140 | zclient_init (struct zclient *zclient, int redist_default, u_short instance) |
718e3744 | 141 | { |
8bb0831e | 142 | int afi, i; |
718e3744 | 143 | |
144 | /* Enable zebra client connection by default. */ | |
145 | zclient->enable = 1; | |
146 | ||
147 | /* Set -1 to the default socket value. */ | |
148 | zclient->sock = -1; | |
149 | ||
150 | /* Clear redistribution flags. */ | |
8bb0831e DS |
151 | for (afi = AFI_IP; afi < AFI_MAX; afi++) |
152 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
153 | memset(&zclient->redist[afi][i], 0, sizeof(struct redist_proto)); | |
718e3744 | 154 | |
155 | /* Set unwanted redistribute route. bgpd does not need BGP route | |
156 | redistribution. */ | |
157 | zclient->redist_default = redist_default; | |
7c8ff89e | 158 | zclient->instance = instance; |
8bb0831e DS |
159 | /* Pending: make afi(s) an arg. */ |
160 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
161 | redist_add_instance (&zclient->redist[afi][redist_default], instance); | |
718e3744 | 162 | |
163 | /* Set default-information redistribute to zero. */ | |
164 | zclient->default_information = 0; | |
165 | ||
166 | /* Schedule first zclient connection. */ | |
167 | if (zclient_debug) | |
8ddca704 | 168 | zlog_debug ("zclient start scheduled"); |
718e3744 | 169 | |
170 | zclient_event (ZCLIENT_SCHEDULE, zclient); | |
171 | } | |
172 | ||
173 | /* Stop zebra client services. */ | |
174 | void | |
175 | zclient_stop (struct zclient *zclient) | |
176 | { | |
177 | if (zclient_debug) | |
8ddca704 | 178 | zlog_debug ("zclient stopped"); |
718e3744 | 179 | |
180 | /* Stop threads. */ | |
634f9ea2 | 181 | THREAD_OFF(zclient->t_read); |
182 | THREAD_OFF(zclient->t_connect); | |
183 | THREAD_OFF(zclient->t_write); | |
184 | ||
185 | /* Reset streams. */ | |
186 | stream_reset(zclient->ibuf); | |
187 | stream_reset(zclient->obuf); | |
188 | ||
189 | /* Empty the write buffer. */ | |
190 | buffer_reset(zclient->wb); | |
718e3744 | 191 | |
192 | /* Close socket. */ | |
193 | if (zclient->sock >= 0) | |
194 | { | |
195 | close (zclient->sock); | |
196 | zclient->sock = -1; | |
197 | } | |
198 | zclient->fail = 0; | |
199 | } | |
200 | ||
201 | void | |
202 | zclient_reset (struct zclient *zclient) | |
203 | { | |
204 | zclient_stop (zclient); | |
7c8ff89e | 205 | zclient_init (zclient, zclient->redist_default, zclient->instance); |
718e3744 | 206 | } |
207 | ||
b5114685 VT |
208 | #ifdef HAVE_TCP_ZEBRA |
209 | ||
718e3744 | 210 | /* Make socket to zebra daemon. Return zebra socket. */ |
b5114685 | 211 | static int |
634f9ea2 | 212 | zclient_socket(void) |
718e3744 | 213 | { |
214 | int sock; | |
215 | int ret; | |
216 | struct sockaddr_in serv; | |
217 | ||
218 | /* We should think about IPv6 connection. */ | |
219 | sock = socket (AF_INET, SOCK_STREAM, 0); | |
220 | if (sock < 0) | |
221 | return -1; | |
222 | ||
223 | /* Make server socket. */ | |
224 | memset (&serv, 0, sizeof (struct sockaddr_in)); | |
225 | serv.sin_family = AF_INET; | |
226 | serv.sin_port = htons (ZEBRA_PORT); | |
6f0e3f6e | 227 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
718e3744 | 228 | serv.sin_len = sizeof (struct sockaddr_in); |
6f0e3f6e | 229 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
718e3744 | 230 | serv.sin_addr.s_addr = htonl (INADDR_LOOPBACK); |
231 | ||
232 | /* Connect to zebra. */ | |
233 | ret = connect (sock, (struct sockaddr *) &serv, sizeof (serv)); | |
234 | if (ret < 0) | |
235 | { | |
236 | close (sock); | |
237 | return -1; | |
238 | } | |
239 | return sock; | |
240 | } | |
241 | ||
3414d035 | 242 | #else |
b5114685 | 243 | |
718e3744 | 244 | /* For sockaddr_un. */ |
245 | #include <sys/un.h> | |
246 | ||
b5114685 | 247 | static int |
8c328f11 | 248 | zclient_socket_un (const char *path) |
718e3744 | 249 | { |
250 | int ret; | |
251 | int sock, len; | |
252 | struct sockaddr_un addr; | |
253 | ||
254 | sock = socket (AF_UNIX, SOCK_STREAM, 0); | |
255 | if (sock < 0) | |
256 | return -1; | |
257 | ||
258 | /* Make server socket. */ | |
259 | memset (&addr, 0, sizeof (struct sockaddr_un)); | |
260 | addr.sun_family = AF_UNIX; | |
261 | strncpy (addr.sun_path, path, strlen (path)); | |
6f0e3f6e | 262 | #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN |
718e3744 | 263 | len = addr.sun_len = SUN_LEN(&addr); |
264 | #else | |
265 | len = sizeof (addr.sun_family) + strlen (addr.sun_path); | |
6f0e3f6e | 266 | #endif /* HAVE_STRUCT_SOCKADDR_UN_SUN_LEN */ |
718e3744 | 267 | |
268 | ret = connect (sock, (struct sockaddr *) &addr, len); | |
269 | if (ret < 0) | |
270 | { | |
271 | close (sock); | |
272 | return -1; | |
273 | } | |
274 | return sock; | |
275 | } | |
276 | ||
3414d035 VT |
277 | #endif /* HAVE_TCP_ZEBRA */ |
278 | ||
b5114685 VT |
279 | /** |
280 | * Connect to zebra daemon. | |
281 | * @param zclient a pointer to zclient structure | |
282 | * @return socket fd just to make sure that connection established | |
283 | * @see zclient_init | |
284 | * @see zclient_new | |
285 | */ | |
286 | int | |
287 | zclient_socket_connect (struct zclient *zclient) | |
288 | { | |
289 | #ifdef HAVE_TCP_ZEBRA | |
290 | zclient->sock = zclient_socket (); | |
291 | #else | |
292 | zclient->sock = zclient_socket_un (zclient_serv_path ? zclient_serv_path : ZEBRA_SERV_PATH); | |
293 | #endif | |
294 | return zclient->sock; | |
295 | } | |
296 | ||
634f9ea2 | 297 | static int |
298 | zclient_failed(struct zclient *zclient) | |
299 | { | |
300 | zclient->fail++; | |
301 | zclient_stop(zclient); | |
302 | zclient_event(ZCLIENT_CONNECT, zclient); | |
303 | return -1; | |
304 | } | |
305 | ||
306 | static int | |
307 | zclient_flush_data(struct thread *thread) | |
308 | { | |
309 | struct zclient *zclient = THREAD_ARG(thread); | |
310 | ||
311 | zclient->t_write = NULL; | |
312 | if (zclient->sock < 0) | |
313 | return -1; | |
314 | switch (buffer_flush_available(zclient->wb, zclient->sock)) | |
315 | { | |
316 | case BUFFER_ERROR: | |
317 | zlog_warn("%s: buffer_flush_available failed on zclient fd %d, closing", | |
318 | __func__, zclient->sock); | |
319 | return zclient_failed(zclient); | |
320 | break; | |
321 | case BUFFER_PENDING: | |
322 | zclient->t_write = thread_add_write(master, zclient_flush_data, | |
323 | zclient, zclient->sock); | |
324 | break; | |
325 | case BUFFER_EMPTY: | |
326 | break; | |
327 | } | |
328 | return 0; | |
329 | } | |
330 | ||
718e3744 | 331 | int |
634f9ea2 | 332 | zclient_send_message(struct zclient *zclient) |
333 | { | |
334 | if (zclient->sock < 0) | |
335 | return -1; | |
336 | switch (buffer_write(zclient->wb, zclient->sock, STREAM_DATA(zclient->obuf), | |
337 | stream_get_endp(zclient->obuf))) | |
338 | { | |
339 | case BUFFER_ERROR: | |
340 | zlog_warn("%s: buffer_write failed to zclient fd %d, closing", | |
341 | __func__, zclient->sock); | |
342 | return zclient_failed(zclient); | |
343 | break; | |
344 | case BUFFER_EMPTY: | |
345 | THREAD_OFF(zclient->t_write); | |
346 | break; | |
347 | case BUFFER_PENDING: | |
348 | THREAD_WRITE_ON(master, zclient->t_write, | |
349 | zclient_flush_data, zclient, zclient->sock); | |
350 | break; | |
351 | } | |
352 | return 0; | |
353 | } | |
354 | ||
d211086a | 355 | void |
c1b9800a | 356 | zclient_create_header (struct stream *s, uint16_t command) |
357 | { | |
358 | /* length placeholder, caller can update */ | |
359 | stream_putw (s, ZEBRA_HEADER_SIZE); | |
360 | stream_putc (s, ZEBRA_HEADER_MARKER); | |
361 | stream_putc (s, ZSERV_VERSION); | |
362 | stream_putw (s, command); | |
363 | } | |
364 | ||
634f9ea2 | 365 | /* Send simple Zebra message. */ |
366 | static int | |
718e3744 | 367 | zebra_message_send (struct zclient *zclient, int command) |
368 | { | |
369 | struct stream *s; | |
370 | ||
371 | /* Get zclient output buffer. */ | |
372 | s = zclient->obuf; | |
373 | stream_reset (s); | |
374 | ||
375 | /* Send very simple command only Zebra message. */ | |
c1b9800a | 376 | zclient_create_header (s, command); |
377 | ||
634f9ea2 | 378 | return zclient_send_message(zclient); |
718e3744 | 379 | } |
380 | ||
2ea1ab1c VT |
381 | static int |
382 | zebra_hello_send (struct zclient *zclient) | |
383 | { | |
384 | struct stream *s; | |
385 | ||
386 | if (zclient->redist_default) | |
387 | { | |
388 | s = zclient->obuf; | |
389 | stream_reset (s); | |
390 | ||
391 | zclient_create_header (s, ZEBRA_HELLO); | |
392 | stream_putc (s, zclient->redist_default); | |
7c8ff89e | 393 | stream_putw (s, zclient->instance); |
2ea1ab1c VT |
394 | stream_putw_at (s, 0, stream_get_endp (s)); |
395 | return zclient_send_message(zclient); | |
396 | } | |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
718e3744 | 401 | /* Make connection to zebra daemon. */ |
402 | int | |
403 | zclient_start (struct zclient *zclient) | |
404 | { | |
405 | int i; | |
8bb0831e | 406 | afi_t afi; |
718e3744 | 407 | |
408 | if (zclient_debug) | |
8ddca704 | 409 | zlog_debug ("zclient_start is called"); |
718e3744 | 410 | |
411 | /* zclient is disabled. */ | |
412 | if (! zclient->enable) | |
413 | return 0; | |
414 | ||
415 | /* If already connected to the zebra. */ | |
416 | if (zclient->sock >= 0) | |
417 | return 0; | |
418 | ||
419 | /* Check connect thread. */ | |
420 | if (zclient->t_connect) | |
421 | return 0; | |
422 | ||
b5114685 | 423 | if (zclient_socket_connect(zclient) < 0) |
718e3744 | 424 | { |
425 | if (zclient_debug) | |
8ddca704 | 426 | zlog_debug ("zclient connection fail"); |
718e3744 | 427 | zclient->fail++; |
428 | zclient_event (ZCLIENT_CONNECT, zclient); | |
429 | return -1; | |
430 | } | |
431 | ||
634f9ea2 | 432 | if (set_nonblocking(zclient->sock) < 0) |
433 | zlog_warn("%s: set_nonblocking(%d) failed", __func__, zclient->sock); | |
434 | ||
718e3744 | 435 | /* Clear fail count. */ |
436 | zclient->fail = 0; | |
437 | if (zclient_debug) | |
8ddca704 | 438 | zlog_debug ("zclient connect success with socket [%d]", zclient->sock); |
718e3744 | 439 | |
440 | /* Create read thread. */ | |
441 | zclient_event (ZCLIENT_READ, zclient); | |
442 | ||
2ea1ab1c VT |
443 | zebra_hello_send (zclient); |
444 | ||
18a6dce6 | 445 | /* We need router-id information. */ |
446 | zebra_message_send (zclient, ZEBRA_ROUTER_ID_ADD); | |
447 | ||
08a7a916 DT |
448 | /* We need interface information. */ |
449 | zebra_message_send (zclient, ZEBRA_INTERFACE_ADD); | |
450 | ||
718e3744 | 451 | /* Flush all redistribute request. */ |
8bb0831e DS |
452 | for (afi = AFI_IP; afi < AFI_MAX; afi++) |
453 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
454 | if (zclient->redist[afi][i].enabled) | |
455 | { | |
456 | struct listnode *node; | |
457 | u_short *id; | |
7c8ff89e | 458 | |
8bb0831e DS |
459 | for (ALL_LIST_ELEMENTS_RO(zclient->redist[afi][i].instances, node, id)) |
460 | if (!(i == zclient->redist_default && *id == zclient->instance)) | |
461 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_ADD, zclient, afi, i, *id); | |
462 | } | |
718e3744 | 463 | |
464 | /* If default information is needed. */ | |
465 | if (zclient->default_information) | |
466 | zebra_message_send (zclient, ZEBRA_REDISTRIBUTE_DEFAULT_ADD); | |
467 | ||
468 | return 0; | |
469 | } | |
470 | ||
471 | /* This function is a wrapper function for calling zclient_start from | |
472 | timer or event thread. */ | |
634f9ea2 | 473 | static int |
718e3744 | 474 | zclient_connect (struct thread *t) |
475 | { | |
476 | struct zclient *zclient; | |
477 | ||
478 | zclient = THREAD_ARG (t); | |
479 | zclient->t_connect = NULL; | |
480 | ||
481 | if (zclient_debug) | |
8ddca704 | 482 | zlog_debug ("zclient_connect is called"); |
718e3744 | 483 | |
484 | return zclient_start (zclient); | |
485 | } | |
6b0655a2 | 486 | |
0a589359 | 487 | /* |
488 | * "xdr_encode"-like interface that allows daemon (client) to send | |
489 | * a message to zebra server for a route that needs to be | |
490 | * added/deleted to the kernel. Info about the route is specified | |
491 | * by the caller in a struct zapi_ipv4. zapi_ipv4_read() then writes | |
492 | * the info down the zclient socket using the stream_* functions. | |
493 | * | |
494 | * The corresponding read ("xdr_decode") function on the server | |
495 | * side is zread_ipv4_add()/zread_ipv4_delete(). | |
496 | * | |
497 | * 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 | |
498 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
499 | * | Length (2) | Command | Route Type | | |
500 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
501 | * | ZEBRA Flags | Message Flags | Prefix length | | |
502 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
503 | * | Destination IPv4 Prefix for route | | |
504 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
505 | * | Nexthop count | | |
506 | * +-+-+-+-+-+-+-+-+ | |
507 | * | |
508 | * | |
509 | * A number of IPv4 nexthop(s) or nexthop interface index(es) are then | |
510 | * described, as per the Nexthop count. Each nexthop described as: | |
511 | * | |
512 | * +-+-+-+-+-+-+-+-+ | |
513 | * | Nexthop Type | Set to one of ZEBRA_NEXTHOP_* | |
514 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
515 | * | IPv4 Nexthop address or Interface Index number | | |
516 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
517 | * | |
518 | * Alternatively, if the flags field has ZEBRA_FLAG_BLACKHOLE or | |
519 | * ZEBRA_FLAG_REJECT is set then Nexthop count is set to 1, then _no_ | |
520 | * nexthop information is provided, and the message describes a prefix | |
521 | * to blackhole or reject route. | |
522 | * | |
c8a1cb5c DS |
523 | * The original struct zapi_ipv4, zapi_ipv4_route() and zread_ipv4_*() |
524 | * infrastructure was built around the traditional (32-bit "gate OR | |
525 | * ifindex") nexthop data unit. A special encoding can be used to feed | |
526 | * onlink (64-bit "gate AND ifindex") nexthops into zapi_ipv4_route() | |
527 | * using the same zapi_ipv4 structure. This is done by setting zapi_ipv4 | |
528 | * fields as follows: | |
529 | * - .message |= ZAPI_MESSAGE_NEXTHOP | ZAPI_MESSAGE_ONLINK | |
530 | * - .nexthop_num == .ifindex_num | |
531 | * - .nexthop and .ifindex are filled with gate and ifindex parts of | |
532 | * each compound nexthop, both in the same order | |
533 | * | |
534 | * zapi_ipv4_route() will produce two nexthop data units for each such | |
535 | * interleaved 64-bit nexthop. On the zserv side of the socket it will be | |
536 | * mapped to a singlle NEXTHOP_TYPE_IPV4_IFINDEX_OL RIB nexthop structure. | |
537 | * | |
0a589359 | 538 | * If ZAPI_MESSAGE_DISTANCE is set, the distance value is written as a 1 |
539 | * byte value. | |
540 | * | |
541 | * If ZAPI_MESSAGE_METRIC is set, the metric value is written as an 8 | |
542 | * byte value. | |
543 | * | |
0d9551dc DS |
544 | * If ZAPI_MESSAGE_TAG is set, the tag value is written as a 2 byte value |
545 | * | |
0a589359 | 546 | * XXX: No attention paid to alignment. |
547 | */ | |
718e3744 | 548 | int |
0a589359 | 549 | zapi_ipv4_route (u_char cmd, struct zclient *zclient, struct prefix_ipv4 *p, |
550 | struct zapi_ipv4 *api) | |
718e3744 | 551 | { |
552 | int i; | |
553 | int psize; | |
554 | struct stream *s; | |
555 | ||
556 | /* Reset stream. */ | |
557 | s = zclient->obuf; | |
558 | stream_reset (s); | |
c1b9800a | 559 | |
560 | zclient_create_header (s, cmd); | |
561 | ||
562 | /* Put type and nexthop. */ | |
718e3744 | 563 | stream_putc (s, api->type); |
7c8ff89e | 564 | stream_putw (s, api->instance); |
718e3744 | 565 | stream_putc (s, api->flags); |
566 | stream_putc (s, api->message); | |
5a616c08 | 567 | stream_putw (s, api->safi); |
718e3744 | 568 | |
718e3744 | 569 | /* Put prefix information. */ |
570 | psize = PSIZE (p->prefixlen); | |
571 | stream_putc (s, p->prefixlen); | |
0a589359 | 572 | stream_write (s, (u_char *) & p->prefix, psize); |
718e3744 | 573 | |
574 | /* Nexthop, ifindex, distance and metric information. */ | |
c8a1cb5c DS |
575 | /* ZAPI_MESSAGE_ONLINK implies interleaving */ |
576 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_ONLINK)) | |
718e3744 | 577 | { |
c8a1cb5c DS |
578 | /* ZAPI_MESSAGE_NEXTHOP is required for proper receiving */ |
579 | assert (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)); | |
580 | /* 64-bit data units, interleaved between nexthop[] and ifindex[] */ | |
581 | assert (api->nexthop_num == api->ifindex_num); | |
582 | stream_putc (s, api->nexthop_num * 2); | |
583 | for (i = 0; i < api->nexthop_num; i++) | |
584 | { | |
585 | stream_putc (s, ZEBRA_NEXTHOP_IPV4_ONLINK); | |
586 | stream_put_in_addr (s, api->nexthop[i]); | |
587 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
588 | stream_putl (s, api->ifindex[i]); | |
589 | } | |
590 | } | |
591 | else if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) | |
592 | { | |
593 | /* traditional 32-bit data units */ | |
595db7f1 | 594 | if (CHECK_FLAG (api->flags, ZEBRA_FLAG_BLACKHOLE)) |
595 | { | |
596 | stream_putc (s, 1); | |
597 | stream_putc (s, ZEBRA_NEXTHOP_BLACKHOLE); | |
0a589359 | 598 | /* XXX assert(api->nexthop_num == 0); */ |
599 | /* XXX assert(api->ifindex_num == 0); */ | |
595db7f1 | 600 | } |
601 | else | |
602 | stream_putc (s, api->nexthop_num + api->ifindex_num); | |
718e3744 | 603 | |
604 | for (i = 0; i < api->nexthop_num; i++) | |
595db7f1 | 605 | { |
606 | stream_putc (s, ZEBRA_NEXTHOP_IPV4); | |
607 | stream_put_in_addr (s, api->nexthop[i]); | |
608 | } | |
718e3744 | 609 | for (i = 0; i < api->ifindex_num; i++) |
595db7f1 | 610 | { |
611 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
612 | stream_putl (s, api->ifindex[i]); | |
613 | } | |
718e3744 | 614 | } |
615 | ||
616 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) | |
617 | stream_putc (s, api->distance); | |
618 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) | |
619 | stream_putl (s, api->metric); | |
0d9551dc DS |
620 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_TAG)) |
621 | stream_putw (s, api->tag); | |
718e3744 | 622 | |
623 | /* Put length at the first point of the stream. */ | |
624 | stream_putw_at (s, 0, stream_get_endp (s)); | |
625 | ||
634f9ea2 | 626 | return zclient_send_message(zclient); |
718e3744 | 627 | } |
628 | ||
629 | #ifdef HAVE_IPV6 | |
630 | int | |
0a589359 | 631 | zapi_ipv6_route (u_char cmd, struct zclient *zclient, struct prefix_ipv6 *p, |
718e3744 | 632 | struct zapi_ipv6 *api) |
633 | { | |
634 | int i; | |
635 | int psize; | |
636 | struct stream *s; | |
637 | ||
638 | /* Reset stream. */ | |
639 | s = zclient->obuf; | |
640 | stream_reset (s); | |
641 | ||
c1b9800a | 642 | zclient_create_header (s, cmd); |
718e3744 | 643 | |
c1b9800a | 644 | /* Put type and nexthop. */ |
718e3744 | 645 | stream_putc (s, api->type); |
7c8ff89e | 646 | stream_putw (s, api->instance); |
718e3744 | 647 | stream_putc (s, api->flags); |
648 | stream_putc (s, api->message); | |
c7ec179a | 649 | stream_putw (s, api->safi); |
718e3744 | 650 | |
651 | /* Put prefix information. */ | |
652 | psize = PSIZE (p->prefixlen); | |
653 | stream_putc (s, p->prefixlen); | |
654 | stream_write (s, (u_char *)&p->prefix, psize); | |
655 | ||
656 | /* Nexthop, ifindex, distance and metric information. */ | |
657 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) | |
658 | { | |
c3c0ac83 DS |
659 | if (CHECK_FLAG (api->flags, ZEBRA_FLAG_BLACKHOLE)) |
660 | { | |
661 | stream_putc (s, 1); | |
662 | stream_putc (s, ZEBRA_NEXTHOP_BLACKHOLE); | |
663 | /* XXX assert(api->nexthop_num == 0); */ | |
664 | /* XXX assert(api->ifindex_num == 0); */ | |
665 | } | |
666 | else | |
667 | stream_putc (s, api->nexthop_num + api->ifindex_num); | |
718e3744 | 668 | |
669 | for (i = 0; i < api->nexthop_num; i++) | |
670 | { | |
671 | stream_putc (s, ZEBRA_NEXTHOP_IPV6); | |
672 | stream_write (s, (u_char *)api->nexthop[i], 16); | |
673 | } | |
674 | for (i = 0; i < api->ifindex_num; i++) | |
675 | { | |
676 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
677 | stream_putl (s, api->ifindex[i]); | |
678 | } | |
679 | } | |
680 | ||
681 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) | |
682 | stream_putc (s, api->distance); | |
683 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) | |
684 | stream_putl (s, api->metric); | |
0d9551dc DS |
685 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_TAG)) |
686 | stream_putw (s, api->tag); | |
718e3744 | 687 | |
688 | /* Put length at the first point of the stream. */ | |
689 | stream_putw_at (s, 0, stream_get_endp (s)); | |
690 | ||
634f9ea2 | 691 | return zclient_send_message(zclient); |
718e3744 | 692 | } |
718e3744 | 693 | #endif /* HAVE_IPV6 */ |
694 | ||
0a589359 | 695 | /* |
696 | * send a ZEBRA_REDISTRIBUTE_ADD or ZEBRA_REDISTRIBUTE_DELETE | |
697 | * for the route type (ZEBRA_ROUTE_KERNEL etc.). The zebra server will | |
698 | * then set/unset redist[type] in the client handle (a struct zserv) for the | |
699 | * sending client | |
700 | */ | |
718e3744 | 701 | int |
8bb0831e | 702 | zebra_redistribute_send (int command, struct zclient *zclient, afi_t afi, int type, |
7c8ff89e | 703 | u_short instance) |
718e3744 | 704 | { |
718e3744 | 705 | struct stream *s; |
706 | ||
634f9ea2 | 707 | s = zclient->obuf; |
708 | stream_reset(s); | |
718e3744 | 709 | |
c1b9800a | 710 | zclient_create_header (s, command); |
8bb0831e | 711 | stream_putc (s, afi); |
718e3744 | 712 | stream_putc (s, type); |
7c8ff89e | 713 | stream_putw (s, instance); |
c1b9800a | 714 | |
715 | stream_putw_at (s, 0, stream_get_endp (s)); | |
716 | ||
634f9ea2 | 717 | return zclient_send_message(zclient); |
718e3744 | 718 | } |
719 | ||
18a6dce6 | 720 | /* Router-id update from zebra daemon. */ |
721 | void | |
722 | zebra_router_id_update_read (struct stream *s, struct prefix *rid) | |
723 | { | |
724 | int plen; | |
725 | ||
726 | /* Fetch interface address. */ | |
727 | rid->family = stream_getc (s); | |
728 | ||
729 | plen = prefix_blen (rid); | |
730 | stream_get (&rid->u.prefix, s, plen); | |
731 | rid->prefixlen = stream_getc (s); | |
732 | } | |
733 | ||
718e3744 | 734 | /* Interface addition from zebra daemon. */ |
0a589359 | 735 | /* |
736 | * The format of the message sent with type ZEBRA_INTERFACE_ADD or | |
737 | * ZEBRA_INTERFACE_DELETE from zebra to the client is: | |
738 | * 0 1 2 3 | |
739 | * 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 | |
740 | * +-+-+-+-+-+-+-+-+ | |
741 | * | type | | |
742 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
743 | * | ifname | | |
744 | * | | | |
745 | * | | | |
746 | * | | | |
747 | * | | | |
748 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
749 | * | ifindex | | |
750 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
751 | * | if_flags | | |
c77d4546 | 752 | * | | |
0a589359 | 753 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
754 | * | metric | | |
755 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
756 | * | ifmtu | | |
757 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
758 | * | ifmtu6 | | |
759 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
760 | * | bandwidth | | |
761 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
762 | * | sockaddr_dl | | |
763 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
764 | */ | |
765 | ||
718e3744 | 766 | struct interface * |
767 | zebra_interface_add_read (struct stream *s) | |
768 | { | |
769 | struct interface *ifp; | |
02ff83c5 | 770 | char ifname_tmp[INTERFACE_NAMSIZ]; |
718e3744 | 771 | |
772 | /* Read interface name. */ | |
773 | stream_get (ifname_tmp, s, INTERFACE_NAMSIZ); | |
774 | ||
a349198f | 775 | /* Lookup/create interface by name. */ |
776 | ifp = if_get_by_name_len (ifname_tmp, strnlen(ifname_tmp, INTERFACE_NAMSIZ)); | |
718e3744 | 777 | |
51d4ef83 | 778 | zebra_interface_if_set_value (s, ifp); |
718e3744 | 779 | |
718e3744 | 780 | return ifp; |
781 | } | |
782 | ||
0a589359 | 783 | /* |
784 | * Read interface up/down msg (ZEBRA_INTERFACE_UP/ZEBRA_INTERFACE_DOWN) | |
785 | * from zebra server. The format of this message is the same as | |
786 | * that sent for ZEBRA_INTERFACE_ADD/ZEBRA_INTERFACE_DELETE (see | |
787 | * comments for zebra_interface_add_read), except that no sockaddr_dl | |
788 | * is sent at the tail of the message. | |
789 | */ | |
718e3744 | 790 | struct interface * |
791 | zebra_interface_state_read (struct stream *s) | |
792 | { | |
793 | struct interface *ifp; | |
02ff83c5 | 794 | char ifname_tmp[INTERFACE_NAMSIZ]; |
718e3744 | 795 | |
796 | /* Read interface name. */ | |
797 | stream_get (ifname_tmp, s, INTERFACE_NAMSIZ); | |
798 | ||
799 | /* Lookup this by interface index. */ | |
a349198f | 800 | ifp = if_lookup_by_name_len (ifname_tmp, |
801 | strnlen(ifname_tmp, INTERFACE_NAMSIZ)); | |
718e3744 | 802 | |
803 | /* If such interface does not exist, indicate an error */ | |
804 | if (! ifp) | |
805 | return NULL; | |
806 | ||
51d4ef83 | 807 | zebra_interface_if_set_value (s, ifp); |
718e3744 | 808 | |
809 | return ifp; | |
810 | } | |
811 | ||
0a589359 | 812 | /* |
813 | * format of message for address additon is: | |
814 | * 0 | |
815 | * 0 1 2 3 4 5 6 7 | |
816 | * +-+-+-+-+-+-+-+-+ | |
817 | * | type | ZEBRA_INTERFACE_ADDRESS_ADD or | |
818 | * +-+-+-+-+-+-+-+-+ ZEBRA_INTERFACE_ADDRES_DELETE | |
819 | * | | | |
820 | * + + | |
821 | * | ifindex | | |
822 | * + + | |
823 | * | | | |
824 | * + + | |
825 | * | | | |
826 | * +-+-+-+-+-+-+-+-+ | |
827 | * | ifc_flags | flags for connected address | |
828 | * +-+-+-+-+-+-+-+-+ | |
829 | * | addr_family | | |
830 | * +-+-+-+-+-+-+-+-+ | |
831 | * | addr... | | |
832 | * : : | |
833 | * | | | |
834 | * +-+-+-+-+-+-+-+-+ | |
835 | * | addr_len | len of addr. E.g., addr_len = 4 for ipv4 addrs. | |
836 | * +-+-+-+-+-+-+-+-+ | |
837 | * | daddr.. | | |
838 | * : : | |
839 | * | | | |
840 | * +-+-+-+-+-+-+-+-+ | |
841 | * | |
842 | */ | |
843 | ||
18a6dce6 | 844 | void |
845 | zebra_interface_if_set_value (struct stream *s, struct interface *ifp) | |
846 | { | |
847 | /* Read interface's index. */ | |
848 | ifp->ifindex = stream_getl (s); | |
508ec910 | 849 | ifp->status = stream_getc (s); |
18a6dce6 | 850 | |
851 | /* Read interface's value. */ | |
c77d4546 | 852 | ifp->flags = stream_getq (s); |
244c1cdc DS |
853 | ifp->ptm_enable = stream_getc (s); |
854 | ifp->ptm_status = stream_getc (s); | |
18a6dce6 | 855 | ifp->metric = stream_getl (s); |
856 | ifp->mtu = stream_getl (s); | |
508ec910 | 857 | ifp->mtu6 = stream_getl (s); |
18a6dce6 | 858 | ifp->bandwidth = stream_getl (s); |
51d4ef83 | 859 | #ifdef HAVE_STRUCT_SOCKADDR_DL |
ca3ccd87 | 860 | stream_get (&ifp->sdl, s, sizeof (ifp->sdl_storage)); |
51d4ef83 JB |
861 | #else |
862 | ifp->hw_addr_len = stream_getl (s); | |
863 | if (ifp->hw_addr_len) | |
864 | stream_get (ifp->hw_addr, s, ifp->hw_addr_len); | |
865 | #endif /* HAVE_STRUCT_SOCKADDR_DL */ | |
18a6dce6 | 866 | } |
867 | ||
3fb9cd6e | 868 | static int |
869 | memconstant(const void *s, int c, size_t n) | |
870 | { | |
871 | const u_char *p = s; | |
872 | ||
873 | while (n-- > 0) | |
874 | if (*p++ != c) | |
875 | return 0; | |
876 | return 1; | |
877 | } | |
878 | ||
d5a5c8f0 DS |
879 | struct interface* |
880 | zebra_interface_bfd_read (struct stream *s, struct prefix *p) | |
881 | { | |
882 | unsigned int ifindex; | |
883 | struct interface *ifp; | |
884 | int plen; | |
885 | ||
886 | /* Get interface index. */ | |
887 | ifindex = stream_getl (s); | |
888 | ||
889 | /* Lookup index. */ | |
890 | ifp = if_lookup_by_index (ifindex); | |
891 | if (ifp == NULL) | |
892 | { | |
893 | zlog_warn ("zebra_interface_bfd_read: " | |
894 | "Can't find interface by ifindex: %d ", ifindex); | |
895 | return NULL; | |
896 | } | |
897 | ||
898 | /* Fetch interface address. */ | |
899 | p->family = stream_getc (s); | |
900 | ||
901 | plen = prefix_blen (p); | |
902 | stream_get (&p->u.prefix, s, plen); | |
903 | p->prefixlen = stream_getc (s); | |
904 | ||
905 | return ifp; | |
906 | } | |
907 | ||
718e3744 | 908 | struct connected * |
0a589359 | 909 | zebra_interface_address_read (int type, struct stream *s) |
718e3744 | 910 | { |
911 | unsigned int ifindex; | |
912 | struct interface *ifp; | |
913 | struct connected *ifc; | |
0a589359 | 914 | struct prefix p, d; |
718e3744 | 915 | int family; |
916 | int plen; | |
0a589359 | 917 | u_char ifc_flags; |
718e3744 | 918 | |
0a589359 | 919 | memset (&p, 0, sizeof(p)); |
920 | memset (&d, 0, sizeof(d)); | |
718e3744 | 921 | |
922 | /* Get interface index. */ | |
923 | ifindex = stream_getl (s); | |
924 | ||
925 | /* Lookup index. */ | |
926 | ifp = if_lookup_by_index (ifindex); | |
927 | if (ifp == NULL) | |
928 | { | |
0a589359 | 929 | zlog_warn ("zebra_interface_address_read(%s): " |
930 | "Can't find interface by ifindex: %d ", | |
931 | (type == ZEBRA_INTERFACE_ADDRESS_ADD? "ADD" : "DELETE"), | |
932 | ifindex); | |
718e3744 | 933 | return NULL; |
934 | } | |
935 | ||
936 | /* Fetch flag. */ | |
0a589359 | 937 | ifc_flags = stream_getc (s); |
718e3744 | 938 | |
939 | /* Fetch interface address. */ | |
940 | family = p.family = stream_getc (s); | |
941 | ||
0a589359 | 942 | plen = prefix_blen (&p); |
943 | stream_get (&p.u.prefix, s, plen); | |
718e3744 | 944 | p.prefixlen = stream_getc (s); |
945 | ||
946 | /* Fetch destination address. */ | |
0a589359 | 947 | stream_get (&d.u.prefix, s, plen); |
718e3744 | 948 | d.family = family; |
949 | ||
0a589359 | 950 | if (type == ZEBRA_INTERFACE_ADDRESS_ADD) |
951 | { | |
3fb9cd6e | 952 | /* N.B. NULL destination pointers are encoded as all zeroes */ |
953 | ifc = connected_add_by_prefix(ifp, &p,(memconstant(&d.u.prefix,0,plen) ? | |
954 | NULL : &d)); | |
0a589359 | 955 | if (ifc != NULL) |
e4529636 AS |
956 | { |
957 | ifc->flags = ifc_flags; | |
958 | if (ifc->destination) | |
959 | ifc->destination->prefixlen = ifc->address->prefixlen; | |
90444ca3 DL |
960 | else if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_PEER)) |
961 | { | |
962 | /* carp interfaces on OpenBSD with 0.0.0.0/0 as "peer" */ | |
963 | char buf[BUFSIZ]; | |
964 | prefix2str (ifc->address, buf, sizeof(buf)); | |
965 | zlog_warn("warning: interface %s address %s " | |
966 | "with peer flag set, but no peer address!", | |
967 | ifp->name, buf); | |
968 | UNSET_FLAG(ifc->flags, ZEBRA_IFA_PEER); | |
969 | } | |
e4529636 | 970 | } |
0a589359 | 971 | } |
972 | else | |
973 | { | |
974 | assert (type == ZEBRA_INTERFACE_ADDRESS_DELETE); | |
975 | ifc = connected_delete_by_prefix(ifp, &p); | |
976 | } | |
718e3744 | 977 | |
978 | return ifc; | |
979 | } | |
0a589359 | 980 | |
a80beece DS |
981 | /* |
982 | * format of message for neighbor connected address is: | |
983 | * 0 | |
984 | * 0 1 2 3 4 5 6 7 | |
985 | * +-+-+-+-+-+-+-+-+ | |
986 | * | type | ZEBRA_INTERFACE_NBR_ADDRESS_ADD or | |
987 | * +-+-+-+-+-+-+-+-+ ZEBRA_INTERFACE_NBR_ADDRES_DELETE | |
988 | * | | | |
989 | * + + | |
990 | * | ifindex | | |
991 | * + + | |
992 | * | | | |
993 | * + + | |
994 | * | | | |
995 | * +-+-+-+-+-+-+-+-+ | |
996 | * | addr_family | | |
997 | * +-+-+-+-+-+-+-+-+ | |
998 | * | addr... | | |
999 | * : : | |
1000 | * | | | |
1001 | * +-+-+-+-+-+-+-+-+ | |
1002 | * | addr_len | len of addr. | |
1003 | * +-+-+-+-+-+-+-+-+ | |
1004 | */ | |
1005 | struct nbr_connected * | |
1006 | zebra_interface_nbr_address_read (int type, struct stream *s) | |
1007 | { | |
1008 | unsigned int ifindex; | |
1009 | struct interface *ifp; | |
1010 | struct prefix p; | |
1011 | struct nbr_connected *ifc; | |
1012 | ||
1013 | /* Get interface index. */ | |
1014 | ifindex = stream_getl (s); | |
1015 | ||
1016 | /* Lookup index. */ | |
1017 | ifp = if_lookup_by_index (ifindex); | |
1018 | if (ifp == NULL) | |
1019 | { | |
1020 | zlog_warn ("zebra_nbr_interface_address_read(%s): " | |
1021 | "Can't find interface by ifindex: %d ", | |
1022 | (type == ZEBRA_INTERFACE_NBR_ADDRESS_ADD? "ADD" : "DELETE"), | |
1023 | ifindex); | |
1024 | return NULL; | |
1025 | } | |
1026 | ||
1027 | p.family = stream_getc (s); | |
1028 | stream_get (&p.u.prefix, s, prefix_blen (&p)); | |
1029 | p.prefixlen = stream_getc (s); | |
1030 | ||
1031 | if (type == ZEBRA_INTERFACE_NBR_ADDRESS_ADD) | |
1032 | { | |
1033 | /* Currently only supporting P2P links, so any new RA source address is | |
1034 | considered as the replacement of the previously learnt Link-Local address. */ | |
1035 | if (!(ifc = listnode_head(ifp->nbr_connected))) | |
1036 | { | |
1037 | ifc = nbr_connected_new (); | |
1038 | ifc->address = prefix_new (); | |
1039 | ifc->ifp = ifp; | |
1040 | listnode_add (ifp->nbr_connected, ifc); | |
1041 | } | |
1042 | ||
1043 | prefix_copy(ifc->address, &p); | |
1044 | } | |
1045 | else | |
1046 | { | |
1047 | assert (type == ZEBRA_INTERFACE_NBR_ADDRESS_DELETE); | |
1048 | ||
1049 | ifc = nbr_connected_check(ifp, &p); | |
1050 | if (ifc) | |
1051 | listnode_delete (ifp->nbr_connected, ifc); | |
1052 | } | |
1053 | ||
1054 | return ifc; | |
1055 | } | |
6b0655a2 | 1056 | |
718e3744 | 1057 | /* Zebra client message read function. */ |
634f9ea2 | 1058 | static int |
718e3744 | 1059 | zclient_read (struct thread *thread) |
1060 | { | |
634f9ea2 | 1061 | size_t already; |
c1b9800a | 1062 | uint16_t length, command; |
1063 | uint8_t marker, version; | |
718e3744 | 1064 | struct zclient *zclient; |
1065 | ||
1066 | /* Get socket to zebra. */ | |
718e3744 | 1067 | zclient = THREAD_ARG (thread); |
1068 | zclient->t_read = NULL; | |
1069 | ||
634f9ea2 | 1070 | /* Read zebra header (if we don't have it already). */ |
1071 | if ((already = stream_get_endp(zclient->ibuf)) < ZEBRA_HEADER_SIZE) | |
718e3744 | 1072 | { |
634f9ea2 | 1073 | ssize_t nbyte; |
1074 | if (((nbyte = stream_read_try(zclient->ibuf, zclient->sock, | |
1075 | ZEBRA_HEADER_SIZE-already)) == 0) || | |
1076 | (nbyte == -1)) | |
1077 | { | |
1078 | if (zclient_debug) | |
1079 | zlog_debug ("zclient connection closed socket [%d].", zclient->sock); | |
1080 | return zclient_failed(zclient); | |
1081 | } | |
1082 | if (nbyte != (ssize_t)(ZEBRA_HEADER_SIZE-already)) | |
1083 | { | |
1084 | /* Try again later. */ | |
1085 | zclient_event (ZCLIENT_READ, zclient); | |
1086 | return 0; | |
1087 | } | |
1088 | already = ZEBRA_HEADER_SIZE; | |
718e3744 | 1089 | } |
1090 | ||
634f9ea2 | 1091 | /* Reset to read from the beginning of the incoming packet. */ |
1092 | stream_set_getp(zclient->ibuf, 0); | |
718e3744 | 1093 | |
c1b9800a | 1094 | /* Fetch header values. */ |
718e3744 | 1095 | length = stream_getw (zclient->ibuf); |
c1b9800a | 1096 | marker = stream_getc (zclient->ibuf); |
1097 | version = stream_getc (zclient->ibuf); | |
1098 | command = stream_getw (zclient->ibuf); | |
1099 | ||
1100 | if (marker != ZEBRA_HEADER_MARKER || version != ZSERV_VERSION) | |
1101 | { | |
1102 | zlog_err("%s: socket %d version mismatch, marker %d, version %d", | |
1103 | __func__, zclient->sock, marker, version); | |
1104 | return zclient_failed(zclient); | |
1105 | } | |
1106 | ||
634f9ea2 | 1107 | if (length < ZEBRA_HEADER_SIZE) |
1108 | { | |
1109 | zlog_err("%s: socket %d message length %u is less than %d ", | |
1110 | __func__, zclient->sock, length, ZEBRA_HEADER_SIZE); | |
1111 | return zclient_failed(zclient); | |
1112 | } | |
1113 | ||
718e3744 | 1114 | /* Length check. */ |
634f9ea2 | 1115 | if (length > STREAM_SIZE(zclient->ibuf)) |
718e3744 | 1116 | { |
634f9ea2 | 1117 | struct stream *ns; |
1118 | zlog_warn("%s: message size %u exceeds buffer size %lu, expanding...", | |
1119 | __func__, length, (u_long)STREAM_SIZE(zclient->ibuf)); | |
1120 | ns = stream_new(length); | |
1121 | stream_copy(ns, zclient->ibuf); | |
718e3744 | 1122 | stream_free (zclient->ibuf); |
634f9ea2 | 1123 | zclient->ibuf = ns; |
718e3744 | 1124 | } |
718e3744 | 1125 | |
1126 | /* Read rest of zebra packet. */ | |
634f9ea2 | 1127 | if (already < length) |
1128 | { | |
1129 | ssize_t nbyte; | |
1130 | if (((nbyte = stream_read_try(zclient->ibuf, zclient->sock, | |
1131 | length-already)) == 0) || | |
1132 | (nbyte == -1)) | |
1133 | { | |
1134 | if (zclient_debug) | |
1135 | zlog_debug("zclient connection closed socket [%d].", zclient->sock); | |
1136 | return zclient_failed(zclient); | |
1137 | } | |
1138 | if (nbyte != (ssize_t)(length-already)) | |
1139 | { | |
1140 | /* Try again later. */ | |
1141 | zclient_event (ZCLIENT_READ, zclient); | |
1142 | return 0; | |
1143 | } | |
1144 | } | |
1145 | ||
1146 | length -= ZEBRA_HEADER_SIZE; | |
718e3744 | 1147 | |
0a589359 | 1148 | if (zclient_debug) |
8ddca704 | 1149 | zlog_debug("zclient 0x%p command 0x%x \n", zclient, command); |
0a589359 | 1150 | |
718e3744 | 1151 | switch (command) |
1152 | { | |
18a6dce6 | 1153 | case ZEBRA_ROUTER_ID_UPDATE: |
1154 | if (zclient->router_id_update) | |
9206f9ec | 1155 | (*zclient->router_id_update) (command, zclient, length); |
18a6dce6 | 1156 | break; |
718e3744 | 1157 | case ZEBRA_INTERFACE_ADD: |
1158 | if (zclient->interface_add) | |
9206f9ec | 1159 | (*zclient->interface_add) (command, zclient, length); |
718e3744 | 1160 | break; |
1161 | case ZEBRA_INTERFACE_DELETE: | |
1162 | if (zclient->interface_delete) | |
9206f9ec | 1163 | (*zclient->interface_delete) (command, zclient, length); |
718e3744 | 1164 | break; |
1165 | case ZEBRA_INTERFACE_ADDRESS_ADD: | |
1166 | if (zclient->interface_address_add) | |
9206f9ec | 1167 | (*zclient->interface_address_add) (command, zclient, length); |
718e3744 | 1168 | break; |
1169 | case ZEBRA_INTERFACE_ADDRESS_DELETE: | |
1170 | if (zclient->interface_address_delete) | |
9206f9ec | 1171 | (*zclient->interface_address_delete) (command, zclient, length); |
718e3744 | 1172 | break; |
d5a5c8f0 DS |
1173 | case ZEBRA_INTERFACE_BFD_DEST_DOWN: |
1174 | if (zclient->interface_bfd_dest_down) | |
1175 | (*zclient->interface_bfd_dest_down) (command, zclient, length); | |
1176 | break; | |
a80beece DS |
1177 | case ZEBRA_INTERFACE_NBR_ADDRESS_ADD: |
1178 | if (zclient->interface_nbr_address_add) | |
1179 | (*zclient->interface_nbr_address_add) (command, zclient, length); | |
1180 | break; | |
1181 | case ZEBRA_INTERFACE_NBR_ADDRESS_DELETE: | |
1182 | if (zclient->interface_nbr_address_delete) | |
1183 | (*zclient->interface_nbr_address_delete) (command, zclient, length); | |
1184 | break; | |
718e3744 | 1185 | case ZEBRA_INTERFACE_UP: |
1186 | if (zclient->interface_up) | |
9206f9ec | 1187 | (*zclient->interface_up) (command, zclient, length); |
718e3744 | 1188 | break; |
1189 | case ZEBRA_INTERFACE_DOWN: | |
1190 | if (zclient->interface_down) | |
9206f9ec | 1191 | (*zclient->interface_down) (command, zclient, length); |
718e3744 | 1192 | break; |
1193 | case ZEBRA_IPV4_ROUTE_ADD: | |
1194 | if (zclient->ipv4_route_add) | |
9206f9ec | 1195 | (*zclient->ipv4_route_add) (command, zclient, length); |
718e3744 | 1196 | break; |
1197 | case ZEBRA_IPV4_ROUTE_DELETE: | |
1198 | if (zclient->ipv4_route_delete) | |
9206f9ec | 1199 | (*zclient->ipv4_route_delete) (command, zclient, length); |
718e3744 | 1200 | break; |
1201 | case ZEBRA_IPV6_ROUTE_ADD: | |
1202 | if (zclient->ipv6_route_add) | |
9206f9ec | 1203 | (*zclient->ipv6_route_add) (command, zclient, length); |
718e3744 | 1204 | break; |
1205 | case ZEBRA_IPV6_ROUTE_DELETE: | |
1206 | if (zclient->ipv6_route_delete) | |
9206f9ec | 1207 | (*zclient->ipv6_route_delete) (command, zclient, length); |
718e3744 | 1208 | break; |
fb018d25 DS |
1209 | case ZEBRA_NEXTHOP_UPDATE: |
1210 | if (zclient_debug) | |
1211 | zlog_debug("zclient rcvd nexthop update\n"); | |
1212 | if (zclient->nexthop_update) | |
1213 | (*zclient->nexthop_update) (command, zclient, length); | |
1214 | break; | |
718e3744 | 1215 | default: |
1216 | break; | |
1217 | } | |
1218 | ||
634f9ea2 | 1219 | if (zclient->sock < 0) |
1220 | /* Connection was closed during packet processing. */ | |
1221 | return -1; | |
1222 | ||
718e3744 | 1223 | /* Register read thread. */ |
634f9ea2 | 1224 | stream_reset(zclient->ibuf); |
718e3744 | 1225 | zclient_event (ZCLIENT_READ, zclient); |
1226 | ||
1227 | return 0; | |
1228 | } | |
1229 | ||
1230 | void | |
8bb0831e | 1231 | zclient_redistribute (int command, struct zclient *zclient, afi_t afi, int type, |
7c8ff89e | 1232 | u_short instance) |
718e3744 | 1233 | { |
718e3744 | 1234 | |
0a589359 | 1235 | if (command == ZEBRA_REDISTRIBUTE_ADD) |
1236 | { | |
8bb0831e | 1237 | if (redist_check_instance(&zclient->redist[afi][type], instance)) |
0a589359 | 1238 | return; |
8bb0831e | 1239 | redist_add_instance(&zclient->redist[afi][type], instance); |
0a589359 | 1240 | } |
1241 | else | |
1242 | { | |
8bb0831e | 1243 | if (!redist_check_instance(&zclient->redist[afi][type], instance)) |
0a589359 | 1244 | return; |
8bb0831e | 1245 | redist_del_instance(&zclient->redist[afi][type], instance); |
0a589359 | 1246 | } |
718e3744 | 1247 | |
1248 | if (zclient->sock > 0) | |
8bb0831e | 1249 | zebra_redistribute_send (command, zclient, afi, type, instance); |
718e3744 | 1250 | } |
1251 | ||
718e3744 | 1252 | |
1253 | void | |
0a589359 | 1254 | zclient_redistribute_default (int command, struct zclient *zclient) |
718e3744 | 1255 | { |
718e3744 | 1256 | |
0a589359 | 1257 | if (command == ZEBRA_REDISTRIBUTE_DEFAULT_ADD) |
1258 | { | |
1259 | if (zclient->default_information) | |
1260 | return; | |
1261 | zclient->default_information = 1; | |
1262 | } | |
1263 | else | |
1264 | { | |
1265 | if (!zclient->default_information) | |
1266 | return; | |
1267 | zclient->default_information = 0; | |
1268 | } | |
718e3744 | 1269 | |
1270 | if (zclient->sock > 0) | |
0a589359 | 1271 | zebra_message_send (zclient, command); |
718e3744 | 1272 | } |
1273 | ||
718e3744 | 1274 | static void |
1275 | zclient_event (enum event event, struct zclient *zclient) | |
1276 | { | |
1277 | switch (event) | |
1278 | { | |
1279 | case ZCLIENT_SCHEDULE: | |
1280 | if (! zclient->t_connect) | |
1281 | zclient->t_connect = | |
1282 | thread_add_event (master, zclient_connect, zclient, 0); | |
1283 | break; | |
1284 | case ZCLIENT_CONNECT: | |
1285 | if (zclient->fail >= 10) | |
1286 | return; | |
1287 | if (zclient_debug) | |
8ddca704 | 1288 | zlog_debug ("zclient connect schedule interval is %d", |
718e3744 | 1289 | zclient->fail < 3 ? 10 : 60); |
1290 | if (! zclient->t_connect) | |
1291 | zclient->t_connect = | |
1292 | thread_add_timer (master, zclient_connect, zclient, | |
1293 | zclient->fail < 3 ? 10 : 60); | |
1294 | break; | |
1295 | case ZCLIENT_READ: | |
1296 | zclient->t_read = | |
1297 | thread_add_read (master, zclient_read, zclient, zclient->sock); | |
1298 | break; | |
1299 | } | |
1300 | } | |
b5114685 VT |
1301 | |
1302 | void | |
1303 | zclient_serv_path_set (char *path) | |
1304 | { | |
1305 | struct stat sb; | |
1306 | ||
1307 | /* reset */ | |
1308 | zclient_serv_path = NULL; | |
1309 | ||
1310 | /* test if `path' is socket. don't set it otherwise. */ | |
1311 | if (stat(path, &sb) == -1) | |
1312 | { | |
1313 | zlog_warn ("%s: zebra socket `%s' does not exist", __func__, path); | |
1314 | return; | |
1315 | } | |
1316 | ||
1317 | if ((sb.st_mode & S_IFMT) != S_IFSOCK) | |
1318 | { | |
1319 | zlog_warn ("%s: `%s' is not unix socket, sir", __func__, path); | |
1320 | return; | |
1321 | } | |
1322 | ||
1323 | /* it seems that path is unix socket */ | |
1324 | zclient_serv_path = path; | |
1325 | } | |
1326 |