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