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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 | ||
b5114685 VT |
42 | char *zclient_serv_path = NULL; |
43 | ||
718e3744 | 44 | /* This file local debug flag. */ |
45 | int zclient_debug = 0; | |
6b0655a2 | 46 | |
718e3744 | 47 | /* Allocate zclient structure. */ |
48 | struct zclient * | |
4140ca4d | 49 | zclient_new (struct thread_master *master) |
718e3744 | 50 | { |
51 | struct zclient *zclient; | |
393deb9b | 52 | zclient = XCALLOC (MTYPE_ZCLIENT, sizeof (struct zclient)); |
718e3744 | 53 | |
54 | zclient->ibuf = stream_new (ZEBRA_MAX_PACKET_SIZ); | |
55 | zclient->obuf = stream_new (ZEBRA_MAX_PACKET_SIZ); | |
634f9ea2 | 56 | zclient->wb = buffer_new(0); |
4140ca4d | 57 | zclient->master = master; |
718e3744 | 58 | |
59 | return zclient; | |
60 | } | |
61 | ||
228da428 | 62 | /* This function is only called when exiting, because |
634f9ea2 | 63 | many parts of the code do not check for I/O errors, so they could |
64 | reference an invalid pointer if the structure was ever freed. | |
634f9ea2 | 65 | |
228da428 | 66 | Free zclient structure. */ |
718e3744 | 67 | void |
68 | zclient_free (struct zclient *zclient) | |
69 | { | |
634f9ea2 | 70 | if (zclient->ibuf) |
71 | stream_free(zclient->ibuf); | |
72 | if (zclient->obuf) | |
73 | stream_free(zclient->obuf); | |
74 | if (zclient->wb) | |
75 | buffer_free(zclient->wb); | |
76 | ||
718e3744 | 77 | XFREE (MTYPE_ZCLIENT, zclient); |
78 | } | |
79 | ||
7c8ff89e DS |
80 | int |
81 | redist_check_instance (struct redist_proto *red, u_short instance) | |
82 | { | |
83 | struct listnode *node; | |
84 | u_short *id; | |
85 | ||
86 | if (!red->instances) | |
87 | return 0; | |
88 | ||
89 | for (ALL_LIST_ELEMENTS_RO (red->instances, node, id)) | |
90 | if (*id == instance) | |
91 | return 1; | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
96 | void | |
97 | redist_add_instance (struct redist_proto *red, u_short instance) | |
98 | { | |
99 | u_short *in; | |
100 | ||
101 | red->enabled = 1; | |
102 | ||
103 | if (!red->instances) | |
104 | red->instances = list_new(); | |
105 | ||
106 | in = (u_short *)calloc(1, sizeof(u_short)); | |
107 | *in = instance; | |
108 | listnode_add (red->instances, in); | |
109 | } | |
110 | ||
111 | void | |
112 | redist_del_instance (struct redist_proto *red, u_short instance) | |
113 | { | |
114 | struct listnode *node; | |
115 | u_short *id = NULL; | |
116 | ||
117 | if (!red->instances) | |
24873f0c | 118 | return; |
7c8ff89e DS |
119 | |
120 | for (ALL_LIST_ELEMENTS_RO (red->instances, node, id)) | |
121 | if (*id == instance) | |
122 | break; | |
123 | ||
124 | if (id) | |
125 | { | |
126 | listnode_delete(red->instances, id); | |
127 | if (!red->instances->count) | |
128 | { | |
129 | red->enabled = 0; | |
130 | list_free(red->instances); | |
131 | red->instances = NULL; | |
132 | } | |
133 | } | |
134 | } | |
135 | ||
718e3744 | 136 | /* Stop zebra client services. */ |
137 | void | |
138 | zclient_stop (struct zclient *zclient) | |
139 | { | |
140 | if (zclient_debug) | |
8ddca704 | 141 | zlog_debug ("zclient stopped"); |
718e3744 | 142 | |
143 | /* Stop threads. */ | |
634f9ea2 | 144 | THREAD_OFF(zclient->t_read); |
145 | THREAD_OFF(zclient->t_connect); | |
146 | THREAD_OFF(zclient->t_write); | |
147 | ||
148 | /* Reset streams. */ | |
149 | stream_reset(zclient->ibuf); | |
150 | stream_reset(zclient->obuf); | |
151 | ||
152 | /* Empty the write buffer. */ | |
153 | buffer_reset(zclient->wb); | |
718e3744 | 154 | |
155 | /* Close socket. */ | |
156 | if (zclient->sock >= 0) | |
157 | { | |
158 | close (zclient->sock); | |
159 | zclient->sock = -1; | |
160 | } | |
161 | zclient->fail = 0; | |
162 | } | |
163 | ||
164 | void | |
165 | zclient_reset (struct zclient *zclient) | |
166 | { | |
7076bb2f | 167 | afi_t afi; |
3d68677e | 168 | |
718e3744 | 169 | zclient_stop (zclient); |
3d68677e DS |
170 | |
171 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
7076bb2f | 172 | redist_del_instance (&zclient->mi_redist[afi][zclient->redist_default], zclient->instance); |
3d68677e | 173 | |
7c8ff89e | 174 | zclient_init (zclient, zclient->redist_default, zclient->instance); |
718e3744 | 175 | } |
176 | ||
b5114685 VT |
177 | #ifdef HAVE_TCP_ZEBRA |
178 | ||
718e3744 | 179 | /* Make socket to zebra daemon. Return zebra socket. */ |
b5114685 | 180 | static int |
634f9ea2 | 181 | zclient_socket(void) |
718e3744 | 182 | { |
183 | int sock; | |
184 | int ret; | |
185 | struct sockaddr_in serv; | |
186 | ||
187 | /* We should think about IPv6 connection. */ | |
188 | sock = socket (AF_INET, SOCK_STREAM, 0); | |
189 | if (sock < 0) | |
190 | return -1; | |
191 | ||
192 | /* Make server socket. */ | |
193 | memset (&serv, 0, sizeof (struct sockaddr_in)); | |
194 | serv.sin_family = AF_INET; | |
195 | serv.sin_port = htons (ZEBRA_PORT); | |
6f0e3f6e | 196 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
718e3744 | 197 | serv.sin_len = sizeof (struct sockaddr_in); |
6f0e3f6e | 198 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
718e3744 | 199 | serv.sin_addr.s_addr = htonl (INADDR_LOOPBACK); |
200 | ||
201 | /* Connect to zebra. */ | |
202 | ret = connect (sock, (struct sockaddr *) &serv, sizeof (serv)); | |
203 | if (ret < 0) | |
204 | { | |
205 | close (sock); | |
206 | return -1; | |
207 | } | |
208 | return sock; | |
209 | } | |
210 | ||
3414d035 | 211 | #else |
b5114685 | 212 | |
718e3744 | 213 | /* For sockaddr_un. */ |
214 | #include <sys/un.h> | |
215 | ||
b5114685 | 216 | static int |
8c328f11 | 217 | zclient_socket_un (const char *path) |
718e3744 | 218 | { |
219 | int ret; | |
220 | int sock, len; | |
221 | struct sockaddr_un addr; | |
222 | ||
223 | sock = socket (AF_UNIX, SOCK_STREAM, 0); | |
224 | if (sock < 0) | |
225 | return -1; | |
226 | ||
227 | /* Make server socket. */ | |
228 | memset (&addr, 0, sizeof (struct sockaddr_un)); | |
229 | addr.sun_family = AF_UNIX; | |
230 | strncpy (addr.sun_path, path, strlen (path)); | |
6f0e3f6e | 231 | #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN |
718e3744 | 232 | len = addr.sun_len = SUN_LEN(&addr); |
233 | #else | |
234 | len = sizeof (addr.sun_family) + strlen (addr.sun_path); | |
6f0e3f6e | 235 | #endif /* HAVE_STRUCT_SOCKADDR_UN_SUN_LEN */ |
718e3744 | 236 | |
237 | ret = connect (sock, (struct sockaddr *) &addr, len); | |
238 | if (ret < 0) | |
239 | { | |
240 | close (sock); | |
241 | return -1; | |
242 | } | |
243 | return sock; | |
244 | } | |
245 | ||
3414d035 VT |
246 | #endif /* HAVE_TCP_ZEBRA */ |
247 | ||
b5114685 VT |
248 | /** |
249 | * Connect to zebra daemon. | |
250 | * @param zclient a pointer to zclient structure | |
251 | * @return socket fd just to make sure that connection established | |
252 | * @see zclient_init | |
253 | * @see zclient_new | |
254 | */ | |
255 | int | |
256 | zclient_socket_connect (struct zclient *zclient) | |
257 | { | |
258 | #ifdef HAVE_TCP_ZEBRA | |
259 | zclient->sock = zclient_socket (); | |
260 | #else | |
261 | zclient->sock = zclient_socket_un (zclient_serv_path ? zclient_serv_path : ZEBRA_SERV_PATH); | |
262 | #endif | |
263 | return zclient->sock; | |
264 | } | |
265 | ||
634f9ea2 | 266 | static int |
267 | zclient_failed(struct zclient *zclient) | |
268 | { | |
269 | zclient->fail++; | |
270 | zclient_stop(zclient); | |
271 | zclient_event(ZCLIENT_CONNECT, zclient); | |
272 | return -1; | |
273 | } | |
274 | ||
275 | static int | |
276 | zclient_flush_data(struct thread *thread) | |
277 | { | |
278 | struct zclient *zclient = THREAD_ARG(thread); | |
279 | ||
280 | zclient->t_write = NULL; | |
281 | if (zclient->sock < 0) | |
282 | return -1; | |
283 | switch (buffer_flush_available(zclient->wb, zclient->sock)) | |
284 | { | |
285 | case BUFFER_ERROR: | |
286 | zlog_warn("%s: buffer_flush_available failed on zclient fd %d, closing", | |
287 | __func__, zclient->sock); | |
288 | return zclient_failed(zclient); | |
289 | break; | |
290 | case BUFFER_PENDING: | |
4140ca4d | 291 | zclient->t_write = thread_add_write(zclient->master, zclient_flush_data, |
634f9ea2 | 292 | zclient, zclient->sock); |
293 | break; | |
294 | case BUFFER_EMPTY: | |
295 | break; | |
296 | } | |
297 | return 0; | |
298 | } | |
299 | ||
718e3744 | 300 | int |
634f9ea2 | 301 | zclient_send_message(struct zclient *zclient) |
302 | { | |
303 | if (zclient->sock < 0) | |
304 | return -1; | |
305 | switch (buffer_write(zclient->wb, zclient->sock, STREAM_DATA(zclient->obuf), | |
306 | stream_get_endp(zclient->obuf))) | |
307 | { | |
308 | case BUFFER_ERROR: | |
309 | zlog_warn("%s: buffer_write failed to zclient fd %d, closing", | |
310 | __func__, zclient->sock); | |
311 | return zclient_failed(zclient); | |
312 | break; | |
313 | case BUFFER_EMPTY: | |
314 | THREAD_OFF(zclient->t_write); | |
315 | break; | |
316 | case BUFFER_PENDING: | |
4140ca4d | 317 | THREAD_WRITE_ON(zclient->master, zclient->t_write, |
634f9ea2 | 318 | zclient_flush_data, zclient, zclient->sock); |
319 | break; | |
320 | } | |
321 | return 0; | |
322 | } | |
323 | ||
d211086a | 324 | void |
7076bb2f | 325 | zclient_create_header (struct stream *s, uint16_t command, vrf_id_t vrf_id) |
c1b9800a | 326 | { |
327 | /* length placeholder, caller can update */ | |
328 | stream_putw (s, ZEBRA_HEADER_SIZE); | |
329 | stream_putc (s, ZEBRA_HEADER_MARKER); | |
330 | stream_putc (s, ZSERV_VERSION); | |
7076bb2f | 331 | stream_putw (s, vrf_id); |
c1b9800a | 332 | stream_putw (s, command); |
333 | } | |
334 | ||
634f9ea2 | 335 | /* Send simple Zebra message. */ |
336 | static int | |
7076bb2f | 337 | zebra_message_send (struct zclient *zclient, int command, vrf_id_t vrf_id) |
718e3744 | 338 | { |
339 | struct stream *s; | |
340 | ||
341 | /* Get zclient output buffer. */ | |
342 | s = zclient->obuf; | |
343 | stream_reset (s); | |
344 | ||
345 | /* Send very simple command only Zebra message. */ | |
7076bb2f | 346 | zclient_create_header (s, command, vrf_id); |
c1b9800a | 347 | |
634f9ea2 | 348 | return zclient_send_message(zclient); |
718e3744 | 349 | } |
350 | ||
2ea1ab1c VT |
351 | static int |
352 | zebra_hello_send (struct zclient *zclient) | |
353 | { | |
354 | struct stream *s; | |
355 | ||
356 | if (zclient->redist_default) | |
357 | { | |
358 | s = zclient->obuf; | |
359 | stream_reset (s); | |
360 | ||
7076bb2f FL |
361 | /* The VRF ID in the HELLO message is always 0. */ |
362 | zclient_create_header (s, ZEBRA_HELLO, VRF_DEFAULT); | |
2ea1ab1c | 363 | stream_putc (s, zclient->redist_default); |
7c8ff89e | 364 | stream_putw (s, zclient->instance); |
2ea1ab1c VT |
365 | stream_putw_at (s, 0, stream_get_endp (s)); |
366 | return zclient_send_message(zclient); | |
367 | } | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
7076bb2f FL |
372 | /* Send requests to zebra daemon for the information in a VRF. */ |
373 | void | |
374 | zclient_send_requests (struct zclient *zclient, vrf_id_t vrf_id) | |
375 | { | |
376 | int i; | |
377 | afi_t afi; | |
378 | ||
379 | /* zclient is disabled. */ | |
380 | if (! zclient->enable) | |
381 | return; | |
382 | ||
383 | /* If not connected to the zebra yet. */ | |
384 | if (zclient->sock < 0) | |
385 | return; | |
386 | ||
387 | if (zclient_debug) | |
388 | zlog_debug ("%s: send messages for VRF %u", __func__, vrf_id); | |
389 | ||
390 | /* We need router-id information. */ | |
391 | zebra_message_send (zclient, ZEBRA_ROUTER_ID_ADD, vrf_id); | |
392 | ||
393 | /* We need interface information. */ | |
394 | zebra_message_send (zclient, ZEBRA_INTERFACE_ADD, vrf_id); | |
395 | ||
396 | /* Set unwanted redistribute route. */ | |
397 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
398 | vrf_bitmap_set (zclient->redist[afi][zclient->redist_default], vrf_id); | |
399 | ||
400 | /* Flush all redistribute request. */ | |
401 | if (vrf_id == VRF_DEFAULT) | |
402 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
403 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
404 | if (zclient->mi_redist[afi][i].enabled) | |
405 | { | |
406 | struct listnode *node; | |
407 | u_short *id; | |
408 | ||
409 | for (ALL_LIST_ELEMENTS_RO(zclient->mi_redist[afi][i].instances, node, id)) | |
410 | if (!(i == zclient->redist_default && *id == zclient->instance)) | |
411 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_ADD, zclient, afi, i, | |
412 | *id, VRF_DEFAULT); | |
413 | } | |
414 | ||
415 | /* Flush all redistribute request. */ | |
416 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
417 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
418 | if (i != zclient->redist_default && | |
419 | vrf_bitmap_check (zclient->redist[afi][i], vrf_id)) | |
420 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_ADD, zclient, afi, i, 0, vrf_id); | |
421 | ||
422 | /* If default information is needed. */ | |
423 | if (vrf_bitmap_check (zclient->default_information, VRF_DEFAULT)) | |
424 | zebra_message_send (zclient, ZEBRA_REDISTRIBUTE_DEFAULT_ADD, vrf_id); | |
425 | } | |
426 | ||
718e3744 | 427 | /* Make connection to zebra daemon. */ |
428 | int | |
429 | zclient_start (struct zclient *zclient) | |
430 | { | |
7076bb2f FL |
431 | if (zclient_debug) |
432 | zlog_info ("zclient_start is called"); | |
433 | ||
434 | /* zclient is disabled. */ | |
435 | if (! zclient->enable) | |
436 | return 0; | |
718e3744 | 437 | |
718e3744 | 438 | /* If already connected to the zebra. */ |
439 | if (zclient->sock >= 0) | |
440 | return 0; | |
441 | ||
442 | /* Check connect thread. */ | |
443 | if (zclient->t_connect) | |
444 | return 0; | |
445 | ||
7076bb2f FL |
446 | if (zclient_socket_connect(zclient) < 0) |
447 | { | |
448 | if (zclient_debug) | |
449 | zlog_debug ("zclient connection fail"); | |
450 | zclient->fail++; | |
451 | zclient_event (ZCLIENT_CONNECT, zclient); | |
452 | return -1; | |
453 | } | |
718e3744 | 454 | |
7076bb2f FL |
455 | if (set_nonblocking(zclient->sock) < 0) |
456 | zlog_warn("%s: set_nonblocking(%d) failed", __func__, zclient->sock); | |
718e3744 | 457 | |
7076bb2f FL |
458 | /* Clear fail count. */ |
459 | zclient->fail = 0; | |
460 | if (zclient_debug) | |
461 | zlog_debug ("zclient connect success with socket [%d]", zclient->sock); | |
718e3744 | 462 | |
7076bb2f FL |
463 | /* Create read thread. */ |
464 | zclient_event (ZCLIENT_READ, zclient); | |
718e3744 | 465 | |
7076bb2f | 466 | zebra_hello_send (zclient); |
718e3744 | 467 | |
7076bb2f FL |
468 | /* Inform the successful connection. */ |
469 | if (zclient->zebra_connected) | |
470 | (*zclient->zebra_connected) (zclient); | |
718e3744 | 471 | |
7076bb2f | 472 | return 0; |
718e3744 | 473 | } |
6b0655a2 | 474 | |
078430f6 DS |
475 | /* Initialize zebra client. Argument redist_default is unwanted |
476 | redistribute route type. */ | |
477 | void | |
478 | zclient_init (struct zclient *zclient, int redist_default, u_short instance) | |
479 | { | |
480 | int afi, i; | |
481 | ||
482 | /* Enable zebra client connection by default. */ | |
483 | zclient->enable = 1; | |
484 | ||
485 | /* Set -1 to the default socket value. */ | |
486 | zclient->sock = -1; | |
487 | ||
488 | /* Clear redistribution flags. */ | |
489 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
490 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
7076bb2f | 491 | zclient->redist[afi][i] = vrf_bitmap_init(); |
078430f6 DS |
492 | |
493 | /* Set unwanted redistribute route. bgpd does not need BGP route | |
494 | redistribution. */ | |
495 | zclient->redist_default = redist_default; | |
496 | zclient->instance = instance; | |
497 | /* Pending: make afi(s) an arg. */ | |
498 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
7076bb2f | 499 | redist_add_instance (&zclient->mi_redist[afi][redist_default], instance); |
078430f6 DS |
500 | |
501 | /* Set default-information redistribute to zero. */ | |
7076bb2f | 502 | zclient->default_information = vrf_bitmap_init ();; |
078430f6 DS |
503 | |
504 | if (zclient_debug) | |
505 | zlog_debug ("zclient_start is called"); | |
506 | ||
7076bb2f FL |
507 | zclient_event (ZCLIENT_SCHEDULE, zclient); |
508 | } | |
078430f6 | 509 | |
7076bb2f FL |
510 | /* This function is a wrapper function for calling zclient_start from |
511 | timer or event thread. */ | |
512 | static int | |
513 | zclient_connect (struct thread *t) | |
514 | { | |
515 | struct zclient *zclient; | |
078430f6 | 516 | |
7076bb2f FL |
517 | zclient = THREAD_ARG (t); |
518 | zclient->t_connect = NULL; | |
078430f6 | 519 | |
078430f6 | 520 | if (zclient_debug) |
7076bb2f | 521 | zlog_debug ("zclient_connect is called"); |
078430f6 | 522 | |
7076bb2f | 523 | return zclient_start (zclient); |
078430f6 DS |
524 | } |
525 | ||
0a589359 | 526 | /* |
527 | * "xdr_encode"-like interface that allows daemon (client) to send | |
528 | * a message to zebra server for a route that needs to be | |
529 | * added/deleted to the kernel. Info about the route is specified | |
530 | * by the caller in a struct zapi_ipv4. zapi_ipv4_read() then writes | |
531 | * the info down the zclient socket using the stream_* functions. | |
532 | * | |
533 | * The corresponding read ("xdr_decode") function on the server | |
534 | * side is zread_ipv4_add()/zread_ipv4_delete(). | |
535 | * | |
536 | * 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 | |
537 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
538 | * | Length (2) | Command | Route Type | | |
539 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
540 | * | ZEBRA Flags | Message Flags | Prefix length | | |
541 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
542 | * | Destination IPv4 Prefix for route | | |
543 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
544 | * | Nexthop count | | |
545 | * +-+-+-+-+-+-+-+-+ | |
546 | * | |
547 | * | |
548 | * A number of IPv4 nexthop(s) or nexthop interface index(es) are then | |
549 | * described, as per the Nexthop count. Each nexthop described as: | |
550 | * | |
551 | * +-+-+-+-+-+-+-+-+ | |
552 | * | Nexthop Type | Set to one of ZEBRA_NEXTHOP_* | |
553 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
554 | * | IPv4 Nexthop address or Interface Index number | | |
555 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
556 | * | |
557 | * Alternatively, if the flags field has ZEBRA_FLAG_BLACKHOLE or | |
558 | * ZEBRA_FLAG_REJECT is set then Nexthop count is set to 1, then _no_ | |
559 | * nexthop information is provided, and the message describes a prefix | |
560 | * to blackhole or reject route. | |
561 | * | |
c8a1cb5c DS |
562 | * The original struct zapi_ipv4, zapi_ipv4_route() and zread_ipv4_*() |
563 | * infrastructure was built around the traditional (32-bit "gate OR | |
564 | * ifindex") nexthop data unit. A special encoding can be used to feed | |
565 | * onlink (64-bit "gate AND ifindex") nexthops into zapi_ipv4_route() | |
566 | * using the same zapi_ipv4 structure. This is done by setting zapi_ipv4 | |
567 | * fields as follows: | |
568 | * - .message |= ZAPI_MESSAGE_NEXTHOP | ZAPI_MESSAGE_ONLINK | |
569 | * - .nexthop_num == .ifindex_num | |
570 | * - .nexthop and .ifindex are filled with gate and ifindex parts of | |
571 | * each compound nexthop, both in the same order | |
572 | * | |
573 | * zapi_ipv4_route() will produce two nexthop data units for each such | |
574 | * interleaved 64-bit nexthop. On the zserv side of the socket it will be | |
575 | * mapped to a singlle NEXTHOP_TYPE_IPV4_IFINDEX_OL RIB nexthop structure. | |
576 | * | |
0a589359 | 577 | * If ZAPI_MESSAGE_DISTANCE is set, the distance value is written as a 1 |
578 | * byte value. | |
579 | * | |
580 | * If ZAPI_MESSAGE_METRIC is set, the metric value is written as an 8 | |
581 | * byte value. | |
582 | * | |
0d9551dc DS |
583 | * If ZAPI_MESSAGE_TAG is set, the tag value is written as a 2 byte value |
584 | * | |
0a589359 | 585 | * XXX: No attention paid to alignment. |
586 | */ | |
718e3744 | 587 | int |
0a589359 | 588 | zapi_ipv4_route (u_char cmd, struct zclient *zclient, struct prefix_ipv4 *p, |
589 | struct zapi_ipv4 *api) | |
718e3744 | 590 | { |
591 | int i; | |
592 | int psize; | |
593 | struct stream *s; | |
594 | ||
595 | /* Reset stream. */ | |
596 | s = zclient->obuf; | |
597 | stream_reset (s); | |
7076bb2f FL |
598 | |
599 | zclient_create_header (s, cmd, api->vrf_id); | |
c1b9800a | 600 | |
601 | /* Put type and nexthop. */ | |
718e3744 | 602 | stream_putc (s, api->type); |
7c8ff89e | 603 | stream_putw (s, api->instance); |
718e3744 | 604 | stream_putc (s, api->flags); |
605 | stream_putc (s, api->message); | |
5a616c08 | 606 | stream_putw (s, api->safi); |
718e3744 | 607 | |
718e3744 | 608 | /* Put prefix information. */ |
609 | psize = PSIZE (p->prefixlen); | |
610 | stream_putc (s, p->prefixlen); | |
0a589359 | 611 | stream_write (s, (u_char *) & p->prefix, psize); |
718e3744 | 612 | |
613 | /* Nexthop, ifindex, distance and metric information. */ | |
d44ca835 | 614 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) |
c8a1cb5c DS |
615 | { |
616 | /* traditional 32-bit data units */ | |
595db7f1 | 617 | if (CHECK_FLAG (api->flags, ZEBRA_FLAG_BLACKHOLE)) |
618 | { | |
619 | stream_putc (s, 1); | |
620 | stream_putc (s, ZEBRA_NEXTHOP_BLACKHOLE); | |
0a589359 | 621 | /* XXX assert(api->nexthop_num == 0); */ |
622 | /* XXX assert(api->ifindex_num == 0); */ | |
595db7f1 | 623 | } |
624 | else | |
625 | stream_putc (s, api->nexthop_num + api->ifindex_num); | |
718e3744 | 626 | |
627 | for (i = 0; i < api->nexthop_num; i++) | |
595db7f1 | 628 | { |
629 | stream_putc (s, ZEBRA_NEXTHOP_IPV4); | |
630 | stream_put_in_addr (s, api->nexthop[i]); | |
631 | } | |
718e3744 | 632 | for (i = 0; i < api->ifindex_num; i++) |
595db7f1 | 633 | { |
634 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
635 | stream_putl (s, api->ifindex[i]); | |
636 | } | |
718e3744 | 637 | } |
638 | ||
639 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) | |
640 | stream_putc (s, api->distance); | |
641 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) | |
642 | stream_putl (s, api->metric); | |
0d9551dc DS |
643 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_TAG)) |
644 | stream_putw (s, api->tag); | |
718e3744 | 645 | |
646 | /* Put length at the first point of the stream. */ | |
647 | stream_putw_at (s, 0, stream_get_endp (s)); | |
648 | ||
634f9ea2 | 649 | return zclient_send_message(zclient); |
718e3744 | 650 | } |
651 | ||
652 | #ifdef HAVE_IPV6 | |
8a92a8a0 DS |
653 | int |
654 | zapi_ipv4_route_ipv6_nexthop (u_char cmd, struct zclient *zclient, | |
655 | struct prefix_ipv4 *p, struct zapi_ipv6 *api) | |
656 | { | |
657 | int i; | |
658 | int psize; | |
659 | struct stream *s; | |
660 | ||
661 | /* Reset stream. */ | |
662 | s = zclient->obuf; | |
663 | stream_reset (s); | |
664 | ||
7076bb2f | 665 | zclient_create_header (s, cmd, api->vrf_id); |
8a92a8a0 DS |
666 | |
667 | /* Put type and nexthop. */ | |
668 | stream_putc (s, api->type); | |
669 | stream_putw (s, api->instance); | |
670 | stream_putc (s, api->flags); | |
671 | stream_putc (s, api->message); | |
672 | stream_putw (s, api->safi); | |
673 | ||
674 | /* Put prefix information. */ | |
675 | psize = PSIZE (p->prefixlen); | |
676 | stream_putc (s, p->prefixlen); | |
677 | stream_write (s, (u_char *) & p->prefix, psize); | |
678 | ||
679 | /* Nexthop, ifindex, distance and metric information. */ | |
680 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) | |
681 | { | |
682 | if (CHECK_FLAG (api->flags, ZEBRA_FLAG_BLACKHOLE)) | |
683 | { | |
684 | stream_putc (s, 1); | |
685 | stream_putc (s, ZEBRA_NEXTHOP_BLACKHOLE); | |
686 | /* XXX assert(api->nexthop_num == 0); */ | |
687 | /* XXX assert(api->ifindex_num == 0); */ | |
688 | } | |
689 | else | |
690 | stream_putc (s, api->nexthop_num + api->ifindex_num); | |
691 | ||
692 | for (i = 0; i < api->nexthop_num; i++) | |
693 | { | |
694 | stream_putc (s, ZEBRA_NEXTHOP_IPV6); | |
695 | stream_write (s, (u_char *)api->nexthop[i], 16); | |
696 | } | |
697 | for (i = 0; i < api->ifindex_num; i++) | |
698 | { | |
699 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
700 | stream_putl (s, api->ifindex[i]); | |
701 | } | |
702 | } | |
703 | ||
704 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) | |
705 | stream_putc (s, api->distance); | |
706 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) | |
707 | stream_putl (s, api->metric); | |
708 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_TAG)) | |
709 | stream_putw (s, api->tag); | |
710 | ||
711 | /* Put length at the first point of the stream. */ | |
712 | stream_putw_at (s, 0, stream_get_endp (s)); | |
713 | ||
714 | return zclient_send_message(zclient); | |
715 | } | |
716 | ||
718e3744 | 717 | int |
0a589359 | 718 | zapi_ipv6_route (u_char cmd, struct zclient *zclient, struct prefix_ipv6 *p, |
718e3744 | 719 | struct zapi_ipv6 *api) |
720 | { | |
721 | int i; | |
722 | int psize; | |
723 | struct stream *s; | |
724 | ||
725 | /* Reset stream. */ | |
726 | s = zclient->obuf; | |
727 | stream_reset (s); | |
728 | ||
7076bb2f | 729 | zclient_create_header (s, cmd, api->vrf_id); |
718e3744 | 730 | |
c1b9800a | 731 | /* Put type and nexthop. */ |
718e3744 | 732 | stream_putc (s, api->type); |
7c8ff89e | 733 | stream_putw (s, api->instance); |
718e3744 | 734 | stream_putc (s, api->flags); |
735 | stream_putc (s, api->message); | |
c7ec179a | 736 | stream_putw (s, api->safi); |
718e3744 | 737 | |
738 | /* Put prefix information. */ | |
739 | psize = PSIZE (p->prefixlen); | |
740 | stream_putc (s, p->prefixlen); | |
741 | stream_write (s, (u_char *)&p->prefix, psize); | |
742 | ||
743 | /* Nexthop, ifindex, distance and metric information. */ | |
744 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) | |
745 | { | |
c3c0ac83 DS |
746 | if (CHECK_FLAG (api->flags, ZEBRA_FLAG_BLACKHOLE)) |
747 | { | |
748 | stream_putc (s, 1); | |
749 | stream_putc (s, ZEBRA_NEXTHOP_BLACKHOLE); | |
750 | /* XXX assert(api->nexthop_num == 0); */ | |
751 | /* XXX assert(api->ifindex_num == 0); */ | |
752 | } | |
753 | else | |
754 | stream_putc (s, api->nexthop_num + api->ifindex_num); | |
718e3744 | 755 | |
756 | for (i = 0; i < api->nexthop_num; i++) | |
757 | { | |
758 | stream_putc (s, ZEBRA_NEXTHOP_IPV6); | |
759 | stream_write (s, (u_char *)api->nexthop[i], 16); | |
760 | } | |
761 | for (i = 0; i < api->ifindex_num; i++) | |
762 | { | |
763 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); | |
764 | stream_putl (s, api->ifindex[i]); | |
765 | } | |
766 | } | |
767 | ||
768 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) | |
769 | stream_putc (s, api->distance); | |
770 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) | |
771 | stream_putl (s, api->metric); | |
0d9551dc DS |
772 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_TAG)) |
773 | stream_putw (s, api->tag); | |
718e3744 | 774 | |
775 | /* Put length at the first point of the stream. */ | |
776 | stream_putw_at (s, 0, stream_get_endp (s)); | |
777 | ||
634f9ea2 | 778 | return zclient_send_message(zclient); |
718e3744 | 779 | } |
718e3744 | 780 | #endif /* HAVE_IPV6 */ |
781 | ||
0a589359 | 782 | /* |
783 | * send a ZEBRA_REDISTRIBUTE_ADD or ZEBRA_REDISTRIBUTE_DELETE | |
784 | * for the route type (ZEBRA_ROUTE_KERNEL etc.). The zebra server will | |
785 | * then set/unset redist[type] in the client handle (a struct zserv) for the | |
786 | * sending client | |
787 | */ | |
718e3744 | 788 | int |
8bb0831e | 789 | zebra_redistribute_send (int command, struct zclient *zclient, afi_t afi, int type, |
7076bb2f | 790 | u_short instance, vrf_id_t vrf_id) |
718e3744 | 791 | { |
718e3744 | 792 | struct stream *s; |
793 | ||
634f9ea2 | 794 | s = zclient->obuf; |
795 | stream_reset(s); | |
718e3744 | 796 | |
7076bb2f | 797 | zclient_create_header (s, command, vrf_id); |
8bb0831e | 798 | stream_putc (s, afi); |
718e3744 | 799 | stream_putc (s, type); |
7c8ff89e | 800 | stream_putw (s, instance); |
c1b9800a | 801 | |
802 | stream_putw_at (s, 0, stream_get_endp (s)); | |
803 | ||
634f9ea2 | 804 | return zclient_send_message(zclient); |
718e3744 | 805 | } |
806 | ||
18a6dce6 | 807 | /* Router-id update from zebra daemon. */ |
808 | void | |
809 | zebra_router_id_update_read (struct stream *s, struct prefix *rid) | |
810 | { | |
811 | int plen; | |
812 | ||
813 | /* Fetch interface address. */ | |
814 | rid->family = stream_getc (s); | |
815 | ||
816 | plen = prefix_blen (rid); | |
817 | stream_get (&rid->u.prefix, s, plen); | |
818 | rid->prefixlen = stream_getc (s); | |
819 | } | |
820 | ||
718e3744 | 821 | /* Interface addition from zebra daemon. */ |
0a589359 | 822 | /* |
823 | * The format of the message sent with type ZEBRA_INTERFACE_ADD or | |
824 | * ZEBRA_INTERFACE_DELETE from zebra to the client is: | |
825 | * 0 1 2 3 | |
826 | * 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 | |
827 | * +-+-+-+-+-+-+-+-+ | |
828 | * | type | | |
829 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
830 | * | ifname | | |
831 | * | | | |
832 | * | | | |
833 | * | | | |
834 | * | | | |
835 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
836 | * | ifindex | | |
837 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
838 | * | if_flags | | |
c77d4546 | 839 | * | | |
0a589359 | 840 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
841 | * | metric | | |
842 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
843 | * | ifmtu | | |
844 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
845 | * | ifmtu6 | | |
846 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
847 | * | bandwidth | | |
848 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
849 | * | sockaddr_dl | | |
850 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
851 | */ | |
852 | ||
718e3744 | 853 | struct interface * |
7076bb2f | 854 | zebra_interface_add_read (struct stream *s, vrf_id_t vrf_id) |
718e3744 | 855 | { |
856 | struct interface *ifp; | |
02ff83c5 | 857 | char ifname_tmp[INTERFACE_NAMSIZ]; |
718e3744 | 858 | |
859 | /* Read interface name. */ | |
860 | stream_get (ifname_tmp, s, INTERFACE_NAMSIZ); | |
861 | ||
a349198f | 862 | /* Lookup/create interface by name. */ |
7076bb2f FL |
863 | ifp = if_get_by_name_len_vrf (ifname_tmp, |
864 | strnlen (ifname_tmp, INTERFACE_NAMSIZ), | |
865 | vrf_id); | |
718e3744 | 866 | |
51d4ef83 | 867 | zebra_interface_if_set_value (s, ifp); |
718e3744 | 868 | |
718e3744 | 869 | return ifp; |
870 | } | |
871 | ||
0a589359 | 872 | /* |
873 | * Read interface up/down msg (ZEBRA_INTERFACE_UP/ZEBRA_INTERFACE_DOWN) | |
874 | * from zebra server. The format of this message is the same as | |
875 | * that sent for ZEBRA_INTERFACE_ADD/ZEBRA_INTERFACE_DELETE (see | |
876 | * comments for zebra_interface_add_read), except that no sockaddr_dl | |
877 | * is sent at the tail of the message. | |
878 | */ | |
718e3744 | 879 | struct interface * |
7076bb2f | 880 | zebra_interface_state_read (struct stream *s, vrf_id_t vrf_id) |
718e3744 | 881 | { |
882 | struct interface *ifp; | |
02ff83c5 | 883 | char ifname_tmp[INTERFACE_NAMSIZ]; |
718e3744 | 884 | |
885 | /* Read interface name. */ | |
886 | stream_get (ifname_tmp, s, INTERFACE_NAMSIZ); | |
887 | ||
888 | /* Lookup this by interface index. */ | |
7076bb2f FL |
889 | ifp = if_lookup_by_name_len_vrf (ifname_tmp, |
890 | strnlen (ifname_tmp, INTERFACE_NAMSIZ), | |
891 | vrf_id); | |
718e3744 | 892 | |
893 | /* If such interface does not exist, indicate an error */ | |
894 | if (! ifp) | |
895 | return NULL; | |
896 | ||
51d4ef83 | 897 | zebra_interface_if_set_value (s, ifp); |
718e3744 | 898 | |
899 | return ifp; | |
900 | } | |
901 | ||
0a589359 | 902 | /* |
903 | * format of message for address additon is: | |
904 | * 0 | |
905 | * 0 1 2 3 4 5 6 7 | |
906 | * +-+-+-+-+-+-+-+-+ | |
907 | * | type | ZEBRA_INTERFACE_ADDRESS_ADD or | |
908 | * +-+-+-+-+-+-+-+-+ ZEBRA_INTERFACE_ADDRES_DELETE | |
909 | * | | | |
910 | * + + | |
911 | * | ifindex | | |
912 | * + + | |
913 | * | | | |
914 | * + + | |
915 | * | | | |
916 | * +-+-+-+-+-+-+-+-+ | |
917 | * | ifc_flags | flags for connected address | |
918 | * +-+-+-+-+-+-+-+-+ | |
919 | * | addr_family | | |
920 | * +-+-+-+-+-+-+-+-+ | |
921 | * | addr... | | |
922 | * : : | |
923 | * | | | |
924 | * +-+-+-+-+-+-+-+-+ | |
925 | * | addr_len | len of addr. E.g., addr_len = 4 for ipv4 addrs. | |
926 | * +-+-+-+-+-+-+-+-+ | |
927 | * | daddr.. | | |
928 | * : : | |
929 | * | | | |
930 | * +-+-+-+-+-+-+-+-+ | |
931 | * | |
932 | */ | |
933 | ||
18a6dce6 | 934 | void |
935 | zebra_interface_if_set_value (struct stream *s, struct interface *ifp) | |
936 | { | |
937 | /* Read interface's index. */ | |
938 | ifp->ifindex = stream_getl (s); | |
508ec910 | 939 | ifp->status = stream_getc (s); |
18a6dce6 | 940 | |
941 | /* Read interface's value. */ | |
c77d4546 | 942 | ifp->flags = stream_getq (s); |
244c1cdc DS |
943 | ifp->ptm_enable = stream_getc (s); |
944 | ifp->ptm_status = stream_getc (s); | |
18a6dce6 | 945 | ifp->metric = stream_getl (s); |
946 | ifp->mtu = stream_getl (s); | |
508ec910 | 947 | ifp->mtu6 = stream_getl (s); |
18a6dce6 | 948 | ifp->bandwidth = stream_getl (s); |
51d4ef83 | 949 | #ifdef HAVE_STRUCT_SOCKADDR_DL |
ca3ccd87 | 950 | stream_get (&ifp->sdl, s, sizeof (ifp->sdl_storage)); |
51d4ef83 JB |
951 | #else |
952 | ifp->hw_addr_len = stream_getl (s); | |
953 | if (ifp->hw_addr_len) | |
954 | stream_get (ifp->hw_addr, s, ifp->hw_addr_len); | |
955 | #endif /* HAVE_STRUCT_SOCKADDR_DL */ | |
18a6dce6 | 956 | } |
957 | ||
3fb9cd6e | 958 | static int |
959 | memconstant(const void *s, int c, size_t n) | |
960 | { | |
961 | const u_char *p = s; | |
962 | ||
963 | while (n-- > 0) | |
964 | if (*p++ != c) | |
965 | return 0; | |
966 | return 1; | |
967 | } | |
968 | ||
d5a5c8f0 | 969 | |
718e3744 | 970 | struct connected * |
7076bb2f | 971 | zebra_interface_address_read (int type, struct stream *s, vrf_id_t vrf_id) |
718e3744 | 972 | { |
973 | unsigned int ifindex; | |
974 | struct interface *ifp; | |
975 | struct connected *ifc; | |
0a589359 | 976 | struct prefix p, d; |
718e3744 | 977 | int family; |
978 | int plen; | |
0a589359 | 979 | u_char ifc_flags; |
718e3744 | 980 | |
0a589359 | 981 | memset (&p, 0, sizeof(p)); |
982 | memset (&d, 0, sizeof(d)); | |
718e3744 | 983 | |
984 | /* Get interface index. */ | |
985 | ifindex = stream_getl (s); | |
986 | ||
987 | /* Lookup index. */ | |
7076bb2f | 988 | ifp = if_lookup_by_index_vrf (ifindex, vrf_id); |
718e3744 | 989 | if (ifp == NULL) |
990 | { | |
0a589359 | 991 | zlog_warn ("zebra_interface_address_read(%s): " |
992 | "Can't find interface by ifindex: %d ", | |
993 | (type == ZEBRA_INTERFACE_ADDRESS_ADD? "ADD" : "DELETE"), | |
994 | ifindex); | |
718e3744 | 995 | return NULL; |
996 | } | |
997 | ||
998 | /* Fetch flag. */ | |
0a589359 | 999 | ifc_flags = stream_getc (s); |
718e3744 | 1000 | |
1001 | /* Fetch interface address. */ | |
1002 | family = p.family = stream_getc (s); | |
1003 | ||
0a589359 | 1004 | plen = prefix_blen (&p); |
1005 | stream_get (&p.u.prefix, s, plen); | |
718e3744 | 1006 | p.prefixlen = stream_getc (s); |
1007 | ||
1008 | /* Fetch destination address. */ | |
0a589359 | 1009 | stream_get (&d.u.prefix, s, plen); |
718e3744 | 1010 | d.family = family; |
1011 | ||
0a589359 | 1012 | if (type == ZEBRA_INTERFACE_ADDRESS_ADD) |
1013 | { | |
3fb9cd6e | 1014 | /* N.B. NULL destination pointers are encoded as all zeroes */ |
1015 | ifc = connected_add_by_prefix(ifp, &p,(memconstant(&d.u.prefix,0,plen) ? | |
1016 | NULL : &d)); | |
0a589359 | 1017 | if (ifc != NULL) |
e4529636 AS |
1018 | { |
1019 | ifc->flags = ifc_flags; | |
1020 | if (ifc->destination) | |
1021 | ifc->destination->prefixlen = ifc->address->prefixlen; | |
90444ca3 DL |
1022 | else if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_PEER)) |
1023 | { | |
1024 | /* carp interfaces on OpenBSD with 0.0.0.0/0 as "peer" */ | |
4690c7d7 | 1025 | char buf[PREFIX2STR_BUFFER]; |
90444ca3 DL |
1026 | prefix2str (ifc->address, buf, sizeof(buf)); |
1027 | zlog_warn("warning: interface %s address %s " | |
1028 | "with peer flag set, but no peer address!", | |
1029 | ifp->name, buf); | |
1030 | UNSET_FLAG(ifc->flags, ZEBRA_IFA_PEER); | |
1031 | } | |
e4529636 | 1032 | } |
0a589359 | 1033 | } |
1034 | else | |
1035 | { | |
1036 | assert (type == ZEBRA_INTERFACE_ADDRESS_DELETE); | |
1037 | ifc = connected_delete_by_prefix(ifp, &p); | |
1038 | } | |
718e3744 | 1039 | |
1040 | return ifc; | |
1041 | } | |
0a589359 | 1042 | |
a80beece DS |
1043 | /* |
1044 | * format of message for neighbor connected address is: | |
1045 | * 0 | |
1046 | * 0 1 2 3 4 5 6 7 | |
1047 | * +-+-+-+-+-+-+-+-+ | |
1048 | * | type | ZEBRA_INTERFACE_NBR_ADDRESS_ADD or | |
1049 | * +-+-+-+-+-+-+-+-+ ZEBRA_INTERFACE_NBR_ADDRES_DELETE | |
1050 | * | | | |
1051 | * + + | |
1052 | * | ifindex | | |
1053 | * + + | |
1054 | * | | | |
1055 | * + + | |
1056 | * | | | |
1057 | * +-+-+-+-+-+-+-+-+ | |
1058 | * | addr_family | | |
1059 | * +-+-+-+-+-+-+-+-+ | |
1060 | * | addr... | | |
1061 | * : : | |
1062 | * | | | |
1063 | * +-+-+-+-+-+-+-+-+ | |
1064 | * | addr_len | len of addr. | |
1065 | * +-+-+-+-+-+-+-+-+ | |
1066 | */ | |
1067 | struct nbr_connected * | |
7076bb2f | 1068 | zebra_interface_nbr_address_read (int type, struct stream *s, vrf_id_t vrf_id) |
a80beece DS |
1069 | { |
1070 | unsigned int ifindex; | |
1071 | struct interface *ifp; | |
1072 | struct prefix p; | |
1073 | struct nbr_connected *ifc; | |
1074 | ||
1075 | /* Get interface index. */ | |
1076 | ifindex = stream_getl (s); | |
1077 | ||
1078 | /* Lookup index. */ | |
1079 | ifp = if_lookup_by_index (ifindex); | |
1080 | if (ifp == NULL) | |
1081 | { | |
1082 | zlog_warn ("zebra_nbr_interface_address_read(%s): " | |
1083 | "Can't find interface by ifindex: %d ", | |
1084 | (type == ZEBRA_INTERFACE_NBR_ADDRESS_ADD? "ADD" : "DELETE"), | |
1085 | ifindex); | |
1086 | return NULL; | |
1087 | } | |
1088 | ||
1089 | p.family = stream_getc (s); | |
1090 | stream_get (&p.u.prefix, s, prefix_blen (&p)); | |
1091 | p.prefixlen = stream_getc (s); | |
1092 | ||
1093 | if (type == ZEBRA_INTERFACE_NBR_ADDRESS_ADD) | |
1094 | { | |
1095 | /* Currently only supporting P2P links, so any new RA source address is | |
1096 | considered as the replacement of the previously learnt Link-Local address. */ | |
1097 | if (!(ifc = listnode_head(ifp->nbr_connected))) | |
1098 | { | |
1099 | ifc = nbr_connected_new (); | |
1100 | ifc->address = prefix_new (); | |
1101 | ifc->ifp = ifp; | |
1102 | listnode_add (ifp->nbr_connected, ifc); | |
1103 | } | |
1104 | ||
1105 | prefix_copy(ifc->address, &p); | |
1106 | } | |
1107 | else | |
1108 | { | |
1109 | assert (type == ZEBRA_INTERFACE_NBR_ADDRESS_DELETE); | |
1110 | ||
1111 | ifc = nbr_connected_check(ifp, &p); | |
1112 | if (ifc) | |
1113 | listnode_delete (ifp->nbr_connected, ifc); | |
1114 | } | |
1115 | ||
1116 | return ifc; | |
1117 | } | |
6b0655a2 | 1118 | |
718e3744 | 1119 | /* Zebra client message read function. */ |
634f9ea2 | 1120 | static int |
718e3744 | 1121 | zclient_read (struct thread *thread) |
1122 | { | |
634f9ea2 | 1123 | size_t already; |
c1b9800a | 1124 | uint16_t length, command; |
1125 | uint8_t marker, version; | |
7076bb2f | 1126 | vrf_id_t vrf_id; |
718e3744 | 1127 | struct zclient *zclient; |
1128 | ||
1129 | /* Get socket to zebra. */ | |
718e3744 | 1130 | zclient = THREAD_ARG (thread); |
1131 | zclient->t_read = NULL; | |
1132 | ||
634f9ea2 | 1133 | /* Read zebra header (if we don't have it already). */ |
1134 | if ((already = stream_get_endp(zclient->ibuf)) < ZEBRA_HEADER_SIZE) | |
718e3744 | 1135 | { |
634f9ea2 | 1136 | ssize_t nbyte; |
1137 | if (((nbyte = stream_read_try(zclient->ibuf, zclient->sock, | |
1138 | ZEBRA_HEADER_SIZE-already)) == 0) || | |
1139 | (nbyte == -1)) | |
1140 | { | |
1141 | if (zclient_debug) | |
1142 | zlog_debug ("zclient connection closed socket [%d].", zclient->sock); | |
1143 | return zclient_failed(zclient); | |
1144 | } | |
1145 | if (nbyte != (ssize_t)(ZEBRA_HEADER_SIZE-already)) | |
1146 | { | |
1147 | /* Try again later. */ | |
1148 | zclient_event (ZCLIENT_READ, zclient); | |
1149 | return 0; | |
1150 | } | |
1151 | already = ZEBRA_HEADER_SIZE; | |
718e3744 | 1152 | } |
1153 | ||
634f9ea2 | 1154 | /* Reset to read from the beginning of the incoming packet. */ |
1155 | stream_set_getp(zclient->ibuf, 0); | |
718e3744 | 1156 | |
c1b9800a | 1157 | /* Fetch header values. */ |
718e3744 | 1158 | length = stream_getw (zclient->ibuf); |
c1b9800a | 1159 | marker = stream_getc (zclient->ibuf); |
1160 | version = stream_getc (zclient->ibuf); | |
7076bb2f | 1161 | vrf_id = stream_getw (zclient->ibuf); |
c1b9800a | 1162 | command = stream_getw (zclient->ibuf); |
1163 | ||
1164 | if (marker != ZEBRA_HEADER_MARKER || version != ZSERV_VERSION) | |
1165 | { | |
1166 | zlog_err("%s: socket %d version mismatch, marker %d, version %d", | |
1167 | __func__, zclient->sock, marker, version); | |
1168 | return zclient_failed(zclient); | |
1169 | } | |
1170 | ||
634f9ea2 | 1171 | if (length < ZEBRA_HEADER_SIZE) |
1172 | { | |
1173 | zlog_err("%s: socket %d message length %u is less than %d ", | |
1174 | __func__, zclient->sock, length, ZEBRA_HEADER_SIZE); | |
1175 | return zclient_failed(zclient); | |
1176 | } | |
1177 | ||
718e3744 | 1178 | /* Length check. */ |
634f9ea2 | 1179 | if (length > STREAM_SIZE(zclient->ibuf)) |
718e3744 | 1180 | { |
634f9ea2 | 1181 | struct stream *ns; |
1182 | zlog_warn("%s: message size %u exceeds buffer size %lu, expanding...", | |
1183 | __func__, length, (u_long)STREAM_SIZE(zclient->ibuf)); | |
1184 | ns = stream_new(length); | |
1185 | stream_copy(ns, zclient->ibuf); | |
718e3744 | 1186 | stream_free (zclient->ibuf); |
634f9ea2 | 1187 | zclient->ibuf = ns; |
718e3744 | 1188 | } |
718e3744 | 1189 | |
1190 | /* Read rest of zebra packet. */ | |
634f9ea2 | 1191 | if (already < length) |
1192 | { | |
1193 | ssize_t nbyte; | |
1194 | if (((nbyte = stream_read_try(zclient->ibuf, zclient->sock, | |
1195 | length-already)) == 0) || | |
1196 | (nbyte == -1)) | |
1197 | { | |
1198 | if (zclient_debug) | |
1199 | zlog_debug("zclient connection closed socket [%d].", zclient->sock); | |
1200 | return zclient_failed(zclient); | |
1201 | } | |
1202 | if (nbyte != (ssize_t)(length-already)) | |
1203 | { | |
1204 | /* Try again later. */ | |
1205 | zclient_event (ZCLIENT_READ, zclient); | |
1206 | return 0; | |
1207 | } | |
1208 | } | |
1209 | ||
1210 | length -= ZEBRA_HEADER_SIZE; | |
718e3744 | 1211 | |
0a589359 | 1212 | if (zclient_debug) |
7076bb2f | 1213 | zlog_debug("zclient 0x%p command 0x%x VRF %u\n", (void *)zclient, command, vrf_id); |
0a589359 | 1214 | |
718e3744 | 1215 | switch (command) |
1216 | { | |
18a6dce6 | 1217 | case ZEBRA_ROUTER_ID_UPDATE: |
1218 | if (zclient->router_id_update) | |
7076bb2f | 1219 | (*zclient->router_id_update) (command, zclient, length, vrf_id); |
18a6dce6 | 1220 | break; |
718e3744 | 1221 | case ZEBRA_INTERFACE_ADD: |
1222 | if (zclient->interface_add) | |
7076bb2f | 1223 | (*zclient->interface_add) (command, zclient, length, vrf_id); |
718e3744 | 1224 | break; |
1225 | case ZEBRA_INTERFACE_DELETE: | |
1226 | if (zclient->interface_delete) | |
7076bb2f | 1227 | (*zclient->interface_delete) (command, zclient, length, vrf_id); |
718e3744 | 1228 | break; |
1229 | case ZEBRA_INTERFACE_ADDRESS_ADD: | |
1230 | if (zclient->interface_address_add) | |
7076bb2f | 1231 | (*zclient->interface_address_add) (command, zclient, length, vrf_id); |
718e3744 | 1232 | break; |
1233 | case ZEBRA_INTERFACE_ADDRESS_DELETE: | |
1234 | if (zclient->interface_address_delete) | |
7076bb2f | 1235 | (*zclient->interface_address_delete) (command, zclient, length, vrf_id); |
718e3744 | 1236 | break; |
68fe91d6 | 1237 | case ZEBRA_INTERFACE_BFD_DEST_UPDATE: |
1238 | if (zclient->interface_bfd_dest_update) | |
7076bb2f | 1239 | (*zclient->interface_bfd_dest_update) (command, zclient, length, vrf_id); |
d5a5c8f0 | 1240 | break; |
a80beece DS |
1241 | case ZEBRA_INTERFACE_NBR_ADDRESS_ADD: |
1242 | if (zclient->interface_nbr_address_add) | |
7076bb2f | 1243 | (*zclient->interface_nbr_address_add) (command, zclient, length, vrf_id); |
a80beece DS |
1244 | break; |
1245 | case ZEBRA_INTERFACE_NBR_ADDRESS_DELETE: | |
1246 | if (zclient->interface_nbr_address_delete) | |
7076bb2f | 1247 | (*zclient->interface_nbr_address_delete) (command, zclient, length, vrf_id); |
a80beece | 1248 | break; |
718e3744 | 1249 | case ZEBRA_INTERFACE_UP: |
1250 | if (zclient->interface_up) | |
7076bb2f | 1251 | (*zclient->interface_up) (command, zclient, length, vrf_id); |
718e3744 | 1252 | break; |
1253 | case ZEBRA_INTERFACE_DOWN: | |
1254 | if (zclient->interface_down) | |
7076bb2f | 1255 | (*zclient->interface_down) (command, zclient, length, vrf_id); |
718e3744 | 1256 | break; |
1257 | case ZEBRA_IPV4_ROUTE_ADD: | |
1258 | if (zclient->ipv4_route_add) | |
7076bb2f | 1259 | (*zclient->ipv4_route_add) (command, zclient, length, vrf_id); |
718e3744 | 1260 | break; |
1261 | case ZEBRA_IPV4_ROUTE_DELETE: | |
1262 | if (zclient->ipv4_route_delete) | |
7076bb2f | 1263 | (*zclient->ipv4_route_delete) (command, zclient, length, vrf_id); |
718e3744 | 1264 | break; |
1265 | case ZEBRA_IPV6_ROUTE_ADD: | |
1266 | if (zclient->ipv6_route_add) | |
7076bb2f | 1267 | (*zclient->ipv6_route_add) (command, zclient, length, vrf_id); |
718e3744 | 1268 | break; |
1269 | case ZEBRA_IPV6_ROUTE_DELETE: | |
1270 | if (zclient->ipv6_route_delete) | |
7076bb2f | 1271 | (*zclient->ipv6_route_delete) (command, zclient, length, vrf_id); |
718e3744 | 1272 | break; |
fb018d25 DS |
1273 | case ZEBRA_NEXTHOP_UPDATE: |
1274 | if (zclient_debug) | |
1275 | zlog_debug("zclient rcvd nexthop update\n"); | |
1276 | if (zclient->nexthop_update) | |
7076bb2f | 1277 | (*zclient->nexthop_update) (command, zclient, length, vrf_id); |
fb018d25 | 1278 | break; |
078430f6 DS |
1279 | case ZEBRA_IMPORT_CHECK_UPDATE: |
1280 | if (zclient_debug) | |
1281 | zlog_debug("zclient rcvd import check update\n"); | |
1282 | if (zclient->import_check_update) | |
7076bb2f | 1283 | (*zclient->import_check_update) (command, zclient, length, vrf_id); |
078430f6 | 1284 | break; |
c43ed2e4 DS |
1285 | case ZEBRA_BFD_DEST_REPLAY: |
1286 | if (zclient->bfd_dest_replay) | |
7076bb2f | 1287 | (*zclient->bfd_dest_replay) (command, zclient, length, vrf_id); |
c43ed2e4 | 1288 | break; |
5048fe14 | 1289 | case ZEBRA_REDISTRIBUTE_IPV4_ADD: |
1290 | if (zclient->redistribute_route_ipv4_add) | |
7076bb2f | 1291 | (*zclient->redistribute_route_ipv4_add) (command, zclient, length, vrf_id); |
5048fe14 | 1292 | break; |
1293 | case ZEBRA_REDISTRIBUTE_IPV4_DEL: | |
1294 | if (zclient->redistribute_route_ipv4_del) | |
7076bb2f | 1295 | (*zclient->redistribute_route_ipv4_del) (command, zclient, length, vrf_id); |
5048fe14 | 1296 | break; |
1297 | case ZEBRA_REDISTRIBUTE_IPV6_ADD: | |
1298 | if (zclient->redistribute_route_ipv6_add) | |
7076bb2f | 1299 | (*zclient->redistribute_route_ipv6_add) (command, zclient, length, vrf_id); |
5048fe14 | 1300 | break; |
1301 | case ZEBRA_REDISTRIBUTE_IPV6_DEL: | |
1302 | if (zclient->redistribute_route_ipv6_del) | |
7076bb2f | 1303 | (*zclient->redistribute_route_ipv6_del) (command, zclient, length, vrf_id); |
5048fe14 | 1304 | break; |
718e3744 | 1305 | default: |
1306 | break; | |
1307 | } | |
1308 | ||
634f9ea2 | 1309 | if (zclient->sock < 0) |
1310 | /* Connection was closed during packet processing. */ | |
1311 | return -1; | |
1312 | ||
718e3744 | 1313 | /* Register read thread. */ |
634f9ea2 | 1314 | stream_reset(zclient->ibuf); |
718e3744 | 1315 | zclient_event (ZCLIENT_READ, zclient); |
1316 | ||
1317 | return 0; | |
1318 | } | |
1319 | ||
1320 | void | |
8bb0831e | 1321 | zclient_redistribute (int command, struct zclient *zclient, afi_t afi, int type, |
7076bb2f | 1322 | u_short instance, vrf_id_t vrf_id) |
718e3744 | 1323 | { |
718e3744 | 1324 | |
7076bb2f FL |
1325 | if (instance) { |
1326 | if (command == ZEBRA_REDISTRIBUTE_ADD) | |
1327 | { | |
1328 | if (redist_check_instance(&zclient->mi_redist[afi][type], instance)) | |
1329 | return; | |
1330 | redist_add_instance(&zclient->mi_redist[afi][type], instance); | |
1331 | } | |
1332 | else | |
1333 | { | |
1334 | if (!redist_check_instance(&zclient->mi_redist[afi][type], instance)) | |
1335 | return; | |
1336 | redist_del_instance(&zclient->mi_redist[afi][type], instance); | |
1337 | } | |
1338 | ||
1339 | } else { | |
1340 | if (command == ZEBRA_REDISTRIBUTE_ADD) | |
1341 | { | |
1342 | if (vrf_bitmap_check (zclient->redist[afi][type], vrf_id)) | |
1343 | return; | |
1344 | vrf_bitmap_set (zclient->redist[afi][type], vrf_id); | |
1345 | } | |
1346 | else | |
1347 | { | |
1348 | if (!vrf_bitmap_check (zclient->redist[afi][type], vrf_id)) | |
1349 | return; | |
1350 | vrf_bitmap_unset (zclient->redist[afi][type], vrf_id); | |
1351 | } | |
1352 | } | |
718e3744 | 1353 | |
1354 | if (zclient->sock > 0) | |
7076bb2f | 1355 | zebra_redistribute_send (command, zclient, afi, type, instance, vrf_id); |
718e3744 | 1356 | } |
1357 | ||
718e3744 | 1358 | |
1359 | void | |
7076bb2f FL |
1360 | zclient_redistribute_default (int command, struct zclient *zclient, |
1361 | vrf_id_t vrf_id) | |
718e3744 | 1362 | { |
718e3744 | 1363 | |
0a589359 | 1364 | if (command == ZEBRA_REDISTRIBUTE_DEFAULT_ADD) |
1365 | { | |
7076bb2f | 1366 | if (vrf_bitmap_check (zclient->default_information, vrf_id)) |
0a589359 | 1367 | return; |
7076bb2f | 1368 | vrf_bitmap_set (zclient->default_information, vrf_id); |
0a589359 | 1369 | } |
1370 | else | |
1371 | { | |
7076bb2f | 1372 | if (!vrf_bitmap_check (zclient->default_information, vrf_id)) |
0a589359 | 1373 | return; |
7076bb2f | 1374 | vrf_bitmap_unset (zclient->default_information, vrf_id); |
0a589359 | 1375 | } |
718e3744 | 1376 | |
1377 | if (zclient->sock > 0) | |
7076bb2f | 1378 | zebra_message_send (zclient, command, vrf_id); |
718e3744 | 1379 | } |
1380 | ||
718e3744 | 1381 | static void |
1382 | zclient_event (enum event event, struct zclient *zclient) | |
1383 | { | |
1384 | switch (event) | |
1385 | { | |
1386 | case ZCLIENT_SCHEDULE: | |
1387 | if (! zclient->t_connect) | |
1388 | zclient->t_connect = | |
4140ca4d | 1389 | thread_add_event (zclient->master, zclient_connect, zclient, 0); |
718e3744 | 1390 | break; |
1391 | case ZCLIENT_CONNECT: | |
1392 | if (zclient->fail >= 10) | |
1393 | return; | |
1394 | if (zclient_debug) | |
8ddca704 | 1395 | zlog_debug ("zclient connect schedule interval is %d", |
718e3744 | 1396 | zclient->fail < 3 ? 10 : 60); |
1397 | if (! zclient->t_connect) | |
1398 | zclient->t_connect = | |
4140ca4d | 1399 | thread_add_timer (zclient->master, zclient_connect, zclient, |
718e3744 | 1400 | zclient->fail < 3 ? 10 : 60); |
1401 | break; | |
1402 | case ZCLIENT_READ: | |
1403 | zclient->t_read = | |
4140ca4d | 1404 | thread_add_read (zclient->master, zclient_read, zclient, zclient->sock); |
718e3744 | 1405 | break; |
1406 | } | |
1407 | } | |
b5114685 VT |
1408 | |
1409 | void | |
1410 | zclient_serv_path_set (char *path) | |
1411 | { | |
1412 | struct stat sb; | |
1413 | ||
1414 | /* reset */ | |
1415 | zclient_serv_path = NULL; | |
1416 | ||
1417 | /* test if `path' is socket. don't set it otherwise. */ | |
1418 | if (stat(path, &sb) == -1) | |
1419 | { | |
1420 | zlog_warn ("%s: zebra socket `%s' does not exist", __func__, path); | |
1421 | return; | |
1422 | } | |
1423 | ||
1424 | if ((sb.st_mode & S_IFMT) != S_IFSOCK) | |
1425 | { | |
1426 | zlog_warn ("%s: `%s' is not unix socket, sir", __func__, path); | |
1427 | return; | |
1428 | } | |
1429 | ||
1430 | /* it seems that path is unix socket */ | |
1431 | zclient_serv_path = path; | |
1432 | } | |
1433 |