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1 | /* Zebra's client library. | |
2 | * Copyright (C) 1999 Kunihiro Ishiguro | |
3 | * Copyright (C) 2005 Andrew J. Schorr | |
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 along | |
18 | * with this program; see the file COPYING; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #include <zebra.h> | |
23 | ||
24 | #include "prefix.h" | |
25 | #include "stream.h" | |
26 | #include "buffer.h" | |
27 | #include "network.h" | |
28 | #include "vrf.h" | |
29 | #include "vrf_int.h" | |
30 | #include "if.h" | |
31 | #include "log.h" | |
32 | #include "thread.h" | |
33 | #include "zclient.h" | |
34 | #include "memory.h" | |
35 | #include "table.h" | |
36 | #include "nexthop.h" | |
37 | #include "mpls.h" | |
38 | ||
39 | DEFINE_MTYPE_STATIC(LIB, ZCLIENT, "Zclient") | |
40 | DEFINE_MTYPE_STATIC(LIB, REDIST_INST, "Redistribution instance IDs") | |
41 | ||
42 | /* Zebra client events. */ | |
43 | enum event { ZCLIENT_SCHEDULE, ZCLIENT_READ, ZCLIENT_CONNECT }; | |
44 | ||
45 | /* Prototype for event manager. */ | |
46 | static void zclient_event(enum event, struct zclient *); | |
47 | ||
48 | struct sockaddr_storage zclient_addr; | |
49 | socklen_t zclient_addr_len; | |
50 | ||
51 | /* This file local debug flag. */ | |
52 | int zclient_debug = 0; | |
53 | ||
54 | /* Allocate zclient structure. */ | |
55 | struct zclient *zclient_new(struct thread_master *master) | |
56 | { | |
57 | struct zclient *zclient; | |
58 | zclient = XCALLOC(MTYPE_ZCLIENT, sizeof(struct zclient)); | |
59 | ||
60 | zclient->ibuf = stream_new(ZEBRA_MAX_PACKET_SIZ); | |
61 | zclient->obuf = stream_new(ZEBRA_MAX_PACKET_SIZ); | |
62 | zclient->wb = buffer_new(0); | |
63 | zclient->master = master; | |
64 | ||
65 | return zclient; | |
66 | } | |
67 | ||
68 | /* This function is only called when exiting, because | |
69 | many parts of the code do not check for I/O errors, so they could | |
70 | reference an invalid pointer if the structure was ever freed. | |
71 | ||
72 | Free zclient structure. */ | |
73 | void zclient_free(struct zclient *zclient) | |
74 | { | |
75 | if (zclient->ibuf) | |
76 | stream_free(zclient->ibuf); | |
77 | if (zclient->obuf) | |
78 | stream_free(zclient->obuf); | |
79 | if (zclient->wb) | |
80 | buffer_free(zclient->wb); | |
81 | ||
82 | XFREE(MTYPE_ZCLIENT, zclient); | |
83 | } | |
84 | ||
85 | u_short *redist_check_instance(struct redist_proto *red, u_short instance) | |
86 | { | |
87 | struct listnode *node; | |
88 | u_short *id; | |
89 | ||
90 | if (!red->instances) | |
91 | return NULL; | |
92 | ||
93 | for (ALL_LIST_ELEMENTS_RO(red->instances, node, id)) | |
94 | if (*id == instance) | |
95 | return id; | |
96 | ||
97 | return NULL; | |
98 | } | |
99 | ||
100 | void redist_add_instance(struct redist_proto *red, u_short instance) | |
101 | { | |
102 | u_short *in; | |
103 | ||
104 | red->enabled = 1; | |
105 | ||
106 | if (!red->instances) | |
107 | red->instances = list_new(); | |
108 | ||
109 | in = XMALLOC(MTYPE_REDIST_INST, sizeof(u_short)); | |
110 | *in = instance; | |
111 | listnode_add(red->instances, in); | |
112 | } | |
113 | ||
114 | void redist_del_instance(struct redist_proto *red, u_short instance) | |
115 | { | |
116 | u_short *id; | |
117 | ||
118 | id = redist_check_instance(red, instance); | |
119 | if (!id) | |
120 | return; | |
121 | ||
122 | listnode_delete(red->instances, id); | |
123 | XFREE(MTYPE_REDIST_INST, id); | |
124 | if (!red->instances->count) { | |
125 | red->enabled = 0; | |
126 | list_free(red->instances); | |
127 | red->instances = NULL; | |
128 | } | |
129 | } | |
130 | ||
131 | /* Stop zebra client services. */ | |
132 | void zclient_stop(struct zclient *zclient) | |
133 | { | |
134 | afi_t afi; | |
135 | int i; | |
136 | ||
137 | if (zclient_debug) | |
138 | zlog_debug("zclient stopped"); | |
139 | ||
140 | /* Stop threads. */ | |
141 | THREAD_OFF(zclient->t_read); | |
142 | THREAD_OFF(zclient->t_connect); | |
143 | THREAD_OFF(zclient->t_write); | |
144 | ||
145 | /* Reset streams. */ | |
146 | stream_reset(zclient->ibuf); | |
147 | stream_reset(zclient->obuf); | |
148 | ||
149 | /* Empty the write buffer. */ | |
150 | buffer_reset(zclient->wb); | |
151 | ||
152 | /* Close socket. */ | |
153 | if (zclient->sock >= 0) { | |
154 | close(zclient->sock); | |
155 | zclient->sock = -1; | |
156 | } | |
157 | zclient->fail = 0; | |
158 | ||
159 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
160 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) { | |
161 | vrf_bitmap_free(zclient->redist[afi][i]); | |
162 | zclient->redist[afi][i] = VRF_BITMAP_NULL; | |
163 | } | |
164 | redist_del_instance( | |
165 | &zclient->mi_redist[afi][zclient->redist_default], | |
166 | zclient->instance); | |
167 | } | |
168 | ||
169 | vrf_bitmap_free(zclient->default_information); | |
170 | zclient->default_information = VRF_BITMAP_NULL; | |
171 | } | |
172 | ||
173 | void zclient_reset(struct zclient *zclient) | |
174 | { | |
175 | afi_t afi; | |
176 | ||
177 | zclient_stop(zclient); | |
178 | ||
179 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
180 | redist_del_instance( | |
181 | &zclient->mi_redist[afi][zclient->redist_default], | |
182 | zclient->instance); | |
183 | ||
184 | zclient_init(zclient, zclient->redist_default, zclient->instance); | |
185 | } | |
186 | ||
187 | /** | |
188 | * Connect to zebra daemon. | |
189 | * @param zclient a pointer to zclient structure | |
190 | * @return socket fd just to make sure that connection established | |
191 | * @see zclient_init | |
192 | * @see zclient_new | |
193 | */ | |
194 | int zclient_socket_connect(struct zclient *zclient) | |
195 | { | |
196 | int sock; | |
197 | int ret; | |
198 | ||
199 | /* We should think about IPv6 connection. */ | |
200 | sock = socket(zclient_addr.ss_family, SOCK_STREAM, 0); | |
201 | if (sock < 0) | |
202 | return -1; | |
203 | ||
204 | set_cloexec(sock); | |
205 | ||
206 | /* Connect to zebra. */ | |
207 | ret = connect(sock, (struct sockaddr *)&zclient_addr, | |
208 | zclient_addr_len); | |
209 | if (ret < 0) { | |
210 | if (zclient_debug) | |
211 | zlog_warn("%s connect failure: %d(%s)", | |
212 | __PRETTY_FUNCTION__, errno, | |
213 | safe_strerror(errno)); | |
214 | close(sock); | |
215 | return -1; | |
216 | } | |
217 | ||
218 | zclient->sock = sock; | |
219 | return sock; | |
220 | } | |
221 | ||
222 | static int zclient_failed(struct zclient *zclient) | |
223 | { | |
224 | zclient->fail++; | |
225 | zclient_stop(zclient); | |
226 | zclient_event(ZCLIENT_CONNECT, zclient); | |
227 | return -1; | |
228 | } | |
229 | ||
230 | static int zclient_flush_data(struct thread *thread) | |
231 | { | |
232 | struct zclient *zclient = THREAD_ARG(thread); | |
233 | ||
234 | zclient->t_write = NULL; | |
235 | if (zclient->sock < 0) | |
236 | return -1; | |
237 | switch (buffer_flush_available(zclient->wb, zclient->sock)) { | |
238 | case BUFFER_ERROR: | |
239 | zlog_warn( | |
240 | "%s: buffer_flush_available failed on zclient fd %d, closing", | |
241 | __func__, zclient->sock); | |
242 | return zclient_failed(zclient); | |
243 | break; | |
244 | case BUFFER_PENDING: | |
245 | zclient->t_write = NULL; | |
246 | thread_add_write(zclient->master, zclient_flush_data, zclient, | |
247 | zclient->sock, &zclient->t_write); | |
248 | break; | |
249 | case BUFFER_EMPTY: | |
250 | break; | |
251 | } | |
252 | return 0; | |
253 | } | |
254 | ||
255 | int zclient_send_message(struct zclient *zclient) | |
256 | { | |
257 | if (zclient->sock < 0) | |
258 | return -1; | |
259 | switch (buffer_write(zclient->wb, zclient->sock, | |
260 | STREAM_DATA(zclient->obuf), | |
261 | stream_get_endp(zclient->obuf))) { | |
262 | case BUFFER_ERROR: | |
263 | zlog_warn("%s: buffer_write failed to zclient fd %d, closing", | |
264 | __func__, zclient->sock); | |
265 | return zclient_failed(zclient); | |
266 | break; | |
267 | case BUFFER_EMPTY: | |
268 | THREAD_OFF(zclient->t_write); | |
269 | break; | |
270 | case BUFFER_PENDING: | |
271 | thread_add_write(zclient->master, zclient_flush_data, zclient, | |
272 | zclient->sock, &zclient->t_write); | |
273 | break; | |
274 | } | |
275 | return 0; | |
276 | } | |
277 | ||
278 | void zclient_create_header(struct stream *s, uint16_t command, vrf_id_t vrf_id) | |
279 | { | |
280 | /* length placeholder, caller can update */ | |
281 | stream_putw(s, ZEBRA_HEADER_SIZE); | |
282 | stream_putc(s, ZEBRA_HEADER_MARKER); | |
283 | stream_putc(s, ZSERV_VERSION); | |
284 | stream_putw(s, vrf_id); | |
285 | stream_putw(s, command); | |
286 | } | |
287 | ||
288 | int zclient_read_header(struct stream *s, int sock, u_int16_t *size, | |
289 | u_char *marker, u_char *version, vrf_id_t *vrf_id, | |
290 | u_int16_t *cmd) | |
291 | { | |
292 | if (stream_read(s, sock, ZEBRA_HEADER_SIZE) != ZEBRA_HEADER_SIZE) | |
293 | return -1; | |
294 | ||
295 | *size = stream_getw(s) - ZEBRA_HEADER_SIZE; | |
296 | *marker = stream_getc(s); | |
297 | *version = stream_getc(s); | |
298 | *vrf_id = stream_getw(s); | |
299 | *cmd = stream_getw(s); | |
300 | ||
301 | if (*version != ZSERV_VERSION || *marker != ZEBRA_HEADER_MARKER) { | |
302 | zlog_err( | |
303 | "%s: socket %d version mismatch, marker %d, version %d", | |
304 | __func__, sock, *marker, *version); | |
305 | return -1; | |
306 | } | |
307 | ||
308 | if (*size && stream_read(s, sock, *size) != *size) | |
309 | return -1; | |
310 | ||
311 | return 0; | |
312 | } | |
313 | ||
314 | /* Send simple Zebra message. */ | |
315 | static int zebra_message_send(struct zclient *zclient, int command, | |
316 | vrf_id_t vrf_id) | |
317 | { | |
318 | struct stream *s; | |
319 | ||
320 | /* Get zclient output buffer. */ | |
321 | s = zclient->obuf; | |
322 | stream_reset(s); | |
323 | ||
324 | /* Send very simple command only Zebra message. */ | |
325 | zclient_create_header(s, command, vrf_id); | |
326 | ||
327 | return zclient_send_message(zclient); | |
328 | } | |
329 | ||
330 | static int zebra_hello_send(struct zclient *zclient) | |
331 | { | |
332 | struct stream *s; | |
333 | ||
334 | if (zclient->redist_default) { | |
335 | s = zclient->obuf; | |
336 | stream_reset(s); | |
337 | ||
338 | /* The VRF ID in the HELLO message is always 0. */ | |
339 | zclient_create_header(s, ZEBRA_HELLO, VRF_DEFAULT); | |
340 | stream_putc(s, zclient->redist_default); | |
341 | stream_putw(s, zclient->instance); | |
342 | stream_putw_at(s, 0, stream_get_endp(s)); | |
343 | return zclient_send_message(zclient); | |
344 | } | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
349 | /* Send register requests to zebra daemon for the information in a VRF. */ | |
350 | void zclient_send_reg_requests(struct zclient *zclient, vrf_id_t vrf_id) | |
351 | { | |
352 | int i; | |
353 | afi_t afi; | |
354 | ||
355 | /* If not connected to the zebra yet. */ | |
356 | if (zclient->sock < 0) | |
357 | return; | |
358 | ||
359 | if (zclient_debug) | |
360 | zlog_debug("%s: send register messages for VRF %u", __func__, | |
361 | vrf_id); | |
362 | ||
363 | /* We need router-id information. */ | |
364 | zebra_message_send(zclient, ZEBRA_ROUTER_ID_ADD, vrf_id); | |
365 | ||
366 | /* We need interface information. */ | |
367 | zebra_message_send(zclient, ZEBRA_INTERFACE_ADD, vrf_id); | |
368 | ||
369 | /* Set unwanted redistribute route. */ | |
370 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
371 | vrf_bitmap_set(zclient->redist[afi][zclient->redist_default], | |
372 | vrf_id); | |
373 | ||
374 | /* Flush all redistribute request. */ | |
375 | if (vrf_id == VRF_DEFAULT) | |
376 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
377 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
378 | if (zclient->mi_redist[afi][i].enabled) { | |
379 | struct listnode *node; | |
380 | u_short *id; | |
381 | ||
382 | for (ALL_LIST_ELEMENTS_RO( | |
383 | zclient->mi_redist[afi][i] | |
384 | .instances, | |
385 | node, id)) | |
386 | if (!(i == zclient->redist_default | |
387 | && *id == zclient->instance)) | |
388 | zebra_redistribute_send( | |
389 | ZEBRA_REDISTRIBUTE_ADD, | |
390 | zclient, afi, i, | |
391 | *id, | |
392 | VRF_DEFAULT); | |
393 | } | |
394 | ||
395 | /* Flush all redistribute request. */ | |
396 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
397 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
398 | if (i != zclient->redist_default | |
399 | && vrf_bitmap_check(zclient->redist[afi][i], | |
400 | vrf_id)) | |
401 | zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, | |
402 | zclient, afi, i, 0, | |
403 | vrf_id); | |
404 | ||
405 | /* If default information is needed. */ | |
406 | if (vrf_bitmap_check(zclient->default_information, VRF_DEFAULT)) | |
407 | zebra_message_send(zclient, ZEBRA_REDISTRIBUTE_DEFAULT_ADD, | |
408 | vrf_id); | |
409 | } | |
410 | ||
411 | /* Send unregister requests to zebra daemon for the information in a VRF. */ | |
412 | void zclient_send_dereg_requests(struct zclient *zclient, vrf_id_t vrf_id) | |
413 | { | |
414 | int i; | |
415 | afi_t afi; | |
416 | ||
417 | /* If not connected to the zebra yet. */ | |
418 | if (zclient->sock < 0) | |
419 | return; | |
420 | ||
421 | if (zclient_debug) | |
422 | zlog_debug("%s: send deregister messages for VRF %u", __func__, | |
423 | vrf_id); | |
424 | ||
425 | /* We need router-id information. */ | |
426 | zebra_message_send(zclient, ZEBRA_ROUTER_ID_DELETE, vrf_id); | |
427 | ||
428 | /* We need interface information. */ | |
429 | zebra_message_send(zclient, ZEBRA_INTERFACE_DELETE, vrf_id); | |
430 | ||
431 | /* Set unwanted redistribute route. */ | |
432 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
433 | vrf_bitmap_set(zclient->redist[afi][zclient->redist_default], | |
434 | vrf_id); | |
435 | ||
436 | /* Flush all redistribute request. */ | |
437 | if (vrf_id == VRF_DEFAULT) | |
438 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
439 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
440 | if (zclient->mi_redist[afi][i].enabled) { | |
441 | struct listnode *node; | |
442 | u_short *id; | |
443 | ||
444 | for (ALL_LIST_ELEMENTS_RO( | |
445 | zclient->mi_redist[afi][i] | |
446 | .instances, | |
447 | node, id)) | |
448 | if (!(i == zclient->redist_default | |
449 | && *id == zclient->instance)) | |
450 | zebra_redistribute_send( | |
451 | ZEBRA_REDISTRIBUTE_DELETE, | |
452 | zclient, afi, i, | |
453 | *id, | |
454 | VRF_DEFAULT); | |
455 | } | |
456 | ||
457 | /* Flush all redistribute request. */ | |
458 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
459 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
460 | if (i != zclient->redist_default | |
461 | && vrf_bitmap_check(zclient->redist[afi][i], | |
462 | vrf_id)) | |
463 | zebra_redistribute_send( | |
464 | ZEBRA_REDISTRIBUTE_DELETE, zclient, afi, | |
465 | i, 0, vrf_id); | |
466 | ||
467 | /* If default information is needed. */ | |
468 | if (vrf_bitmap_check(zclient->default_information, VRF_DEFAULT)) | |
469 | zebra_message_send(zclient, ZEBRA_REDISTRIBUTE_DEFAULT_DELETE, | |
470 | vrf_id); | |
471 | } | |
472 | ||
473 | /* Send request to zebra daemon to start or stop RA. */ | |
474 | void zclient_send_interface_radv_req(struct zclient *zclient, vrf_id_t vrf_id, | |
475 | struct interface *ifp, int enable, | |
476 | int ra_interval) | |
477 | { | |
478 | struct stream *s; | |
479 | ||
480 | /* If not connected to the zebra yet. */ | |
481 | if (zclient->sock < 0) | |
482 | return; | |
483 | ||
484 | /* Form and send message. */ | |
485 | s = zclient->obuf; | |
486 | stream_reset(s); | |
487 | ||
488 | if (enable) | |
489 | zclient_create_header(s, ZEBRA_INTERFACE_ENABLE_RADV, vrf_id); | |
490 | else | |
491 | zclient_create_header(s, ZEBRA_INTERFACE_DISABLE_RADV, vrf_id); | |
492 | ||
493 | stream_putl(s, ifp->ifindex); | |
494 | stream_putl(s, ra_interval); | |
495 | ||
496 | stream_putw_at(s, 0, stream_get_endp(s)); | |
497 | ||
498 | zclient_send_message(zclient); | |
499 | } | |
500 | ||
501 | /* Make connection to zebra daemon. */ | |
502 | int zclient_start(struct zclient *zclient) | |
503 | { | |
504 | if (zclient_debug) | |
505 | zlog_info("zclient_start is called"); | |
506 | ||
507 | /* If already connected to the zebra. */ | |
508 | if (zclient->sock >= 0) | |
509 | return 0; | |
510 | ||
511 | /* Check connect thread. */ | |
512 | if (zclient->t_connect) | |
513 | return 0; | |
514 | ||
515 | if (zclient_socket_connect(zclient) < 0) { | |
516 | if (zclient_debug) | |
517 | zlog_debug("zclient connection fail"); | |
518 | zclient->fail++; | |
519 | zclient_event(ZCLIENT_CONNECT, zclient); | |
520 | return -1; | |
521 | } | |
522 | ||
523 | if (set_nonblocking(zclient->sock) < 0) | |
524 | zlog_warn("%s: set_nonblocking(%d) failed", __func__, | |
525 | zclient->sock); | |
526 | ||
527 | /* Clear fail count. */ | |
528 | zclient->fail = 0; | |
529 | if (zclient_debug) | |
530 | zlog_debug("zclient connect success with socket [%d]", | |
531 | zclient->sock); | |
532 | ||
533 | /* Create read thread. */ | |
534 | zclient_event(ZCLIENT_READ, zclient); | |
535 | ||
536 | zebra_hello_send(zclient); | |
537 | ||
538 | /* Inform the successful connection. */ | |
539 | if (zclient->zebra_connected) | |
540 | (*zclient->zebra_connected)(zclient); | |
541 | ||
542 | return 0; | |
543 | } | |
544 | ||
545 | /* Initialize zebra client. Argument redist_default is unwanted | |
546 | redistribute route type. */ | |
547 | void zclient_init(struct zclient *zclient, int redist_default, u_short instance) | |
548 | { | |
549 | int afi, i; | |
550 | ||
551 | /* Set -1 to the default socket value. */ | |
552 | zclient->sock = -1; | |
553 | ||
554 | /* Clear redistribution flags. */ | |
555 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
556 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
557 | zclient->redist[afi][i] = vrf_bitmap_init(); | |
558 | ||
559 | /* Set unwanted redistribute route. bgpd does not need BGP route | |
560 | redistribution. */ | |
561 | zclient->redist_default = redist_default; | |
562 | zclient->instance = instance; | |
563 | /* Pending: make afi(s) an arg. */ | |
564 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
565 | redist_add_instance(&zclient->mi_redist[afi][redist_default], | |
566 | instance); | |
567 | ||
568 | /* Set default-information redistribute to zero. */ | |
569 | zclient->default_information = vrf_bitmap_init(); | |
570 | ; | |
571 | ||
572 | if (zclient_debug) | |
573 | zlog_debug("zclient_start is called"); | |
574 | ||
575 | zclient_event(ZCLIENT_SCHEDULE, zclient); | |
576 | } | |
577 | ||
578 | /* This function is a wrapper function for calling zclient_start from | |
579 | timer or event thread. */ | |
580 | static int zclient_connect(struct thread *t) | |
581 | { | |
582 | struct zclient *zclient; | |
583 | ||
584 | zclient = THREAD_ARG(t); | |
585 | zclient->t_connect = NULL; | |
586 | ||
587 | if (zclient_debug) | |
588 | zlog_debug("zclient_connect is called"); | |
589 | ||
590 | return zclient_start(zclient); | |
591 | } | |
592 | ||
593 | /* | |
594 | * "xdr_encode"-like interface that allows daemon (client) to send | |
595 | * a message to zebra server for a route that needs to be | |
596 | * added/deleted to the kernel. Info about the route is specified | |
597 | * by the caller in a struct zapi_ipv4. zapi_ipv4_read() then writes | |
598 | * the info down the zclient socket using the stream_* functions. | |
599 | * | |
600 | * The corresponding read ("xdr_decode") function on the server | |
601 | * side is zread_ipv4_add()/zread_ipv4_delete(). | |
602 | * | |
603 | * 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 | |
604 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
605 | * | Length (2) | Command | Route Type | | |
606 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
607 | * | ZEBRA Flags | Message Flags | Prefix length | | |
608 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
609 | * | Destination IPv4 Prefix for route | | |
610 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
611 | * | Nexthop count | | |
612 | * +-+-+-+-+-+-+-+-+ | |
613 | * | |
614 | * | |
615 | * A number of IPv4 nexthop(s) or nexthop interface index(es) are then | |
616 | * described, as per the Nexthop count. Each nexthop described as: | |
617 | * | |
618 | * +-+-+-+-+-+-+-+-+ | |
619 | * | Nexthop Type | Set to one of ZEBRA_NEXTHOP_* | |
620 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
621 | * | IPv4 Nexthop address or Interface Index number | | |
622 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
623 | * | |
624 | * Alternatively, if the flags field has ZEBRA_FLAG_BLACKHOLE or | |
625 | * ZEBRA_FLAG_REJECT is set then Nexthop count is set to 1, then _no_ | |
626 | * nexthop information is provided, and the message describes a prefix | |
627 | * to blackhole or reject route. | |
628 | * | |
629 | * The original struct zapi_ipv4, zapi_ipv4_route() and zread_ipv4_*() | |
630 | * infrastructure was built around the traditional (32-bit "gate OR | |
631 | * ifindex") nexthop data unit. A special encoding can be used to feed | |
632 | * onlink (64-bit "gate AND ifindex") nexthops into zapi_ipv4_route() | |
633 | * using the same zapi_ipv4 structure. This is done by setting zapi_ipv4 | |
634 | * fields as follows: | |
635 | * - .message |= ZAPI_MESSAGE_NEXTHOP | ZAPI_MESSAGE_ONLINK | |
636 | * - .nexthop_num == .ifindex_num | |
637 | * - .nexthop and .ifindex are filled with gate and ifindex parts of | |
638 | * each compound nexthop, both in the same order | |
639 | * | |
640 | * zapi_ipv4_route() will produce two nexthop data units for each such | |
641 | * interleaved 64-bit nexthop. On the zserv side of the socket it will be | |
642 | * mapped to a singlle NEXTHOP_TYPE_IPV4_IFINDEX_OL RIB nexthop structure. | |
643 | * | |
644 | * If ZAPI_MESSAGE_DISTANCE is set, the distance value is written as a 1 | |
645 | * byte value. | |
646 | * | |
647 | * If ZAPI_MESSAGE_METRIC is set, the metric value is written as an 8 | |
648 | * byte value. | |
649 | * | |
650 | * If ZAPI_MESSAGE_TAG is set, the tag value is written as a 4 byte value | |
651 | * | |
652 | * If ZAPI_MESSAGE_MTU is set, the mtu value is written as a 4 byte value | |
653 | * | |
654 | * XXX: No attention paid to alignment. | |
655 | */ | |
656 | int zapi_ipv4_route(u_char cmd, struct zclient *zclient, struct prefix_ipv4 *p, | |
657 | struct zapi_ipv4 *api) | |
658 | { | |
659 | int i; | |
660 | int psize; | |
661 | struct stream *s; | |
662 | ||
663 | /* Reset stream. */ | |
664 | s = zclient->obuf; | |
665 | stream_reset(s); | |
666 | ||
667 | /* Some checks for labeled-unicast. The current expectation is that each | |
668 | * nexthop is accompanied by a label in the case of labeled-unicast. | |
669 | */ | |
670 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL) | |
671 | && CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) { | |
672 | /* We expect prefixes installed with labels and the number to | |
673 | * match | |
674 | * the number of nexthops. | |
675 | */ | |
676 | assert(api->label_num == api->nexthop_num); | |
677 | } | |
678 | ||
679 | zclient_create_header(s, cmd, api->vrf_id); | |
680 | ||
681 | /* Put type and nexthop. */ | |
682 | stream_putc(s, api->type); | |
683 | stream_putw(s, api->instance); | |
684 | stream_putl(s, api->flags); | |
685 | stream_putc(s, api->message); | |
686 | stream_putw(s, api->safi); | |
687 | ||
688 | /* Put prefix information. */ | |
689 | psize = PSIZE(p->prefixlen); | |
690 | stream_putc(s, p->prefixlen); | |
691 | stream_write(s, (u_char *)&p->prefix, psize); | |
692 | ||
693 | /* Nexthop, ifindex, distance and metric information. */ | |
694 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) { | |
695 | /* traditional 32-bit data units */ | |
696 | if (CHECK_FLAG(api->flags, ZEBRA_FLAG_BLACKHOLE)) { | |
697 | stream_putc(s, 1); | |
698 | stream_putc(s, NEXTHOP_TYPE_BLACKHOLE); | |
699 | /* XXX assert(api->nexthop_num == 0); */ | |
700 | /* XXX assert(api->ifindex_num == 0); */ | |
701 | } else | |
702 | stream_putc(s, api->nexthop_num + api->ifindex_num); | |
703 | ||
704 | for (i = 0; i < api->nexthop_num; i++) { | |
705 | stream_putc(s, NEXTHOP_TYPE_IPV4); | |
706 | stream_put_in_addr(s, api->nexthop[i]); | |
707 | /* For labeled-unicast, each nexthop is followed by | |
708 | * label. */ | |
709 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL)) | |
710 | stream_putl(s, api->label[i]); | |
711 | } | |
712 | for (i = 0; i < api->ifindex_num; i++) { | |
713 | stream_putc(s, NEXTHOP_TYPE_IFINDEX); | |
714 | stream_putl(s, api->ifindex[i]); | |
715 | } | |
716 | } | |
717 | ||
718 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_DISTANCE)) | |
719 | stream_putc(s, api->distance); | |
720 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_METRIC)) | |
721 | stream_putl(s, api->metric); | |
722 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_TAG)) | |
723 | stream_putl(s, api->tag); | |
724 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_MTU)) | |
725 | stream_putl(s, api->mtu); | |
726 | ||
727 | /* Put length at the first point of the stream. */ | |
728 | stream_putw_at(s, 0, stream_get_endp(s)); | |
729 | ||
730 | return zclient_send_message(zclient); | |
731 | } | |
732 | ||
733 | int zapi_ipv4_route_ipv6_nexthop(u_char cmd, struct zclient *zclient, | |
734 | struct prefix_ipv4 *p, struct zapi_ipv6 *api) | |
735 | { | |
736 | int i; | |
737 | int psize; | |
738 | struct stream *s; | |
739 | ||
740 | /* Reset stream. */ | |
741 | s = zclient->obuf; | |
742 | stream_reset(s); | |
743 | ||
744 | /* Some checks for labeled-unicast. The current expectation is that each | |
745 | * nexthop is accompanied by a label in the case of labeled-unicast. | |
746 | */ | |
747 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL) | |
748 | && CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) { | |
749 | /* We expect prefixes installed with labels and the number to | |
750 | * match | |
751 | * the number of nexthops. | |
752 | */ | |
753 | assert(api->label_num == api->nexthop_num); | |
754 | } | |
755 | ||
756 | zclient_create_header(s, cmd, api->vrf_id); | |
757 | ||
758 | /* Put type and nexthop. */ | |
759 | stream_putc(s, api->type); | |
760 | stream_putw(s, api->instance); | |
761 | stream_putl(s, api->flags); | |
762 | stream_putc(s, api->message); | |
763 | stream_putw(s, api->safi); | |
764 | ||
765 | /* Put prefix information. */ | |
766 | psize = PSIZE(p->prefixlen); | |
767 | stream_putc(s, p->prefixlen); | |
768 | stream_write(s, (u_char *)&p->prefix, psize); | |
769 | ||
770 | /* Nexthop, ifindex, distance and metric information. */ | |
771 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) { | |
772 | if (CHECK_FLAG(api->flags, ZEBRA_FLAG_BLACKHOLE)) { | |
773 | stream_putc(s, 1); | |
774 | stream_putc(s, NEXTHOP_TYPE_BLACKHOLE); | |
775 | /* XXX assert(api->nexthop_num == 0); */ | |
776 | /* XXX assert(api->ifindex_num == 0); */ | |
777 | } else | |
778 | stream_putc(s, api->nexthop_num + api->ifindex_num); | |
779 | ||
780 | for (i = 0; i < api->nexthop_num; i++) { | |
781 | stream_putc(s, NEXTHOP_TYPE_IPV6); | |
782 | stream_write(s, (u_char *)api->nexthop[i], 16); | |
783 | /* For labeled-unicast, each nexthop is followed by | |
784 | * label. */ | |
785 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL)) | |
786 | stream_putl(s, api->label[i]); | |
787 | } | |
788 | for (i = 0; i < api->ifindex_num; i++) { | |
789 | stream_putc(s, NEXTHOP_TYPE_IFINDEX); | |
790 | stream_putl(s, api->ifindex[i]); | |
791 | } | |
792 | } | |
793 | ||
794 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_DISTANCE)) | |
795 | stream_putc(s, api->distance); | |
796 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_METRIC)) | |
797 | stream_putl(s, api->metric); | |
798 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_TAG)) | |
799 | stream_putl(s, api->tag); | |
800 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_MTU)) | |
801 | stream_putl(s, api->mtu); | |
802 | ||
803 | /* Put length at the first point of the stream. */ | |
804 | stream_putw_at(s, 0, stream_get_endp(s)); | |
805 | ||
806 | return zclient_send_message(zclient); | |
807 | } | |
808 | ||
809 | int zapi_ipv6_route(u_char cmd, struct zclient *zclient, struct prefix_ipv6 *p, | |
810 | struct prefix_ipv6 *src_p, struct zapi_ipv6 *api) | |
811 | { | |
812 | int i; | |
813 | int psize; | |
814 | struct stream *s; | |
815 | ||
816 | /* either we have !SRCPFX && src_p == NULL, or SRCPFX && src_p != NULL | |
817 | */ | |
818 | assert(!(api->message & ZAPI_MESSAGE_SRCPFX) == !src_p); | |
819 | ||
820 | /* Reset stream. */ | |
821 | s = zclient->obuf; | |
822 | stream_reset(s); | |
823 | ||
824 | /* Some checks for labeled-unicast. The current expectation is that each | |
825 | * nexthop is accompanied by a label in the case of labeled-unicast. | |
826 | */ | |
827 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL) | |
828 | && CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) { | |
829 | /* We expect prefixes installed with labels and the number to | |
830 | * match | |
831 | * the number of nexthops. | |
832 | */ | |
833 | assert(api->label_num == api->nexthop_num); | |
834 | } | |
835 | ||
836 | zclient_create_header(s, cmd, api->vrf_id); | |
837 | ||
838 | /* Put type and nexthop. */ | |
839 | stream_putc(s, api->type); | |
840 | stream_putw(s, api->instance); | |
841 | stream_putl(s, api->flags); | |
842 | stream_putc(s, api->message); | |
843 | stream_putw(s, api->safi); | |
844 | ||
845 | /* Put prefix information. */ | |
846 | psize = PSIZE(p->prefixlen); | |
847 | stream_putc(s, p->prefixlen); | |
848 | stream_write(s, (u_char *)&p->prefix, psize); | |
849 | ||
850 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_SRCPFX)) { | |
851 | psize = PSIZE(src_p->prefixlen); | |
852 | stream_putc(s, src_p->prefixlen); | |
853 | stream_write(s, (u_char *)&src_p->prefix, psize); | |
854 | } | |
855 | ||
856 | /* Nexthop, ifindex, distance and metric information. */ | |
857 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) { | |
858 | if (CHECK_FLAG(api->flags, ZEBRA_FLAG_BLACKHOLE)) { | |
859 | stream_putc(s, 1); | |
860 | stream_putc(s, NEXTHOP_TYPE_BLACKHOLE); | |
861 | /* XXX assert(api->nexthop_num == 0); */ | |
862 | /* XXX assert(api->ifindex_num == 0); */ | |
863 | } else | |
864 | stream_putc(s, api->nexthop_num + api->ifindex_num); | |
865 | ||
866 | for (i = 0; i < api->nexthop_num; i++) { | |
867 | stream_putc(s, NEXTHOP_TYPE_IPV6); | |
868 | stream_write(s, (u_char *)api->nexthop[i], 16); | |
869 | /* For labeled-unicast, each nexthop is followed by | |
870 | * label. */ | |
871 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL)) | |
872 | stream_putl(s, api->label[i]); | |
873 | } | |
874 | for (i = 0; i < api->ifindex_num; i++) { | |
875 | stream_putc(s, NEXTHOP_TYPE_IFINDEX); | |
876 | stream_putl(s, api->ifindex[i]); | |
877 | } | |
878 | } | |
879 | ||
880 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_DISTANCE)) | |
881 | stream_putc(s, api->distance); | |
882 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_METRIC)) | |
883 | stream_putl(s, api->metric); | |
884 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_TAG)) | |
885 | stream_putl(s, api->tag); | |
886 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_MTU)) | |
887 | stream_putl(s, api->mtu); | |
888 | ||
889 | /* Put length at the first point of the stream. */ | |
890 | stream_putw_at(s, 0, stream_get_endp(s)); | |
891 | ||
892 | return zclient_send_message(zclient); | |
893 | } | |
894 | ||
895 | int zclient_route_send(u_char cmd, struct zclient *zclient, | |
896 | struct zapi_route *api) | |
897 | { | |
898 | if (zapi_route_encode(cmd, zclient->obuf, api) < 0) | |
899 | return -1; | |
900 | return zclient_send_message(zclient); | |
901 | } | |
902 | ||
903 | int zapi_route_encode(u_char cmd, struct stream *s, struct zapi_route *api) | |
904 | { | |
905 | struct zapi_nexthop *api_nh; | |
906 | int i; | |
907 | int psize; | |
908 | ||
909 | stream_reset(s); | |
910 | zclient_create_header(s, cmd, api->vrf_id); | |
911 | ||
912 | stream_putc(s, api->type); | |
913 | stream_putw(s, api->instance); | |
914 | stream_putl(s, api->flags); | |
915 | stream_putc(s, api->message); | |
916 | stream_putw(s, api->safi); | |
917 | ||
918 | /* Put prefix information. */ | |
919 | stream_putc(s, api->prefix.family); | |
920 | psize = PSIZE(api->prefix.prefixlen); | |
921 | stream_putc(s, api->prefix.prefixlen); | |
922 | stream_write(s, (u_char *)&api->prefix.u.prefix, psize); | |
923 | ||
924 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_SRCPFX)) { | |
925 | psize = PSIZE(api->src_prefix.prefixlen); | |
926 | stream_putc(s, api->src_prefix.prefixlen); | |
927 | stream_write(s, (u_char *)&api->src_prefix.prefix, psize); | |
928 | } | |
929 | ||
930 | /* Nexthops. */ | |
931 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) { | |
932 | /* limit the number of nexthops if necessary */ | |
933 | if (api->nexthop_num > MULTIPATH_NUM) { | |
934 | char buf[PREFIX2STR_BUFFER]; | |
935 | ||
936 | prefix2str(&api->prefix, buf, sizeof(buf)); | |
937 | zlog_warn( | |
938 | "%s: prefix %s: encoding %u nexthops out of %u", | |
939 | __func__, buf, MULTIPATH_NUM, api->nexthop_num); | |
940 | api->nexthop_num = MULTIPATH_NUM; | |
941 | } | |
942 | ||
943 | stream_putc(s, api->nexthop_num); | |
944 | ||
945 | for (i = 0; i < api->nexthop_num; i++) { | |
946 | api_nh = &api->nexthops[i]; | |
947 | ||
948 | stream_putc(s, api_nh->type); | |
949 | switch (api_nh->type) { | |
950 | case NEXTHOP_TYPE_BLACKHOLE: | |
951 | break; | |
952 | case NEXTHOP_TYPE_IPV4: | |
953 | stream_put_in_addr(s, &api_nh->gate.ipv4); | |
954 | break; | |
955 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
956 | stream_put_in_addr(s, &api_nh->gate.ipv4); | |
957 | stream_putl(s, api_nh->ifindex); | |
958 | break; | |
959 | case NEXTHOP_TYPE_IFINDEX: | |
960 | stream_putl(s, api_nh->ifindex); | |
961 | break; | |
962 | case NEXTHOP_TYPE_IPV6: | |
963 | stream_write(s, (u_char *)&api_nh->gate.ipv6, | |
964 | 16); | |
965 | break; | |
966 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
967 | stream_write(s, (u_char *)&api_nh->gate.ipv6, | |
968 | 16); | |
969 | stream_putl(s, api_nh->ifindex); | |
970 | break; | |
971 | } | |
972 | ||
973 | /* MPLS labels for BGP-LU or Segment Routing */ | |
974 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL)) { | |
975 | if (api_nh->label_num > MPLS_MAX_LABELS) { | |
976 | char buf[PREFIX2STR_BUFFER]; | |
977 | prefix2str(&api->prefix, buf, | |
978 | sizeof(buf)); | |
979 | zlog_err( | |
980 | "%s: prefix %s: can't encode " | |
981 | "%u labels (maximum is %u)", | |
982 | __func__, buf, | |
983 | api_nh->label_num, | |
984 | MPLS_MAX_LABELS); | |
985 | return -1; | |
986 | } | |
987 | ||
988 | stream_putc(s, api_nh->label_num); | |
989 | stream_put(s, &api_nh->labels[0], | |
990 | api_nh->label_num | |
991 | * sizeof(mpls_label_t)); | |
992 | } | |
993 | } | |
994 | } | |
995 | ||
996 | /* Attributes. */ | |
997 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_DISTANCE)) | |
998 | stream_putc(s, api->distance); | |
999 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_METRIC)) | |
1000 | stream_putl(s, api->metric); | |
1001 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_TAG)) | |
1002 | stream_putl(s, api->tag); | |
1003 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_MTU)) | |
1004 | stream_putl(s, api->mtu); | |
1005 | ||
1006 | /* Put length at the first point of the stream. */ | |
1007 | stream_putw_at(s, 0, stream_get_endp(s)); | |
1008 | ||
1009 | return 0; | |
1010 | } | |
1011 | ||
1012 | int zapi_route_decode(struct stream *s, struct zapi_route *api) | |
1013 | { | |
1014 | struct zapi_nexthop *api_nh; | |
1015 | int i; | |
1016 | ||
1017 | memset(api, 0, sizeof(*api)); | |
1018 | ||
1019 | /* Type, flags, message. */ | |
1020 | api->type = stream_getc(s); | |
1021 | api->instance = stream_getw(s); | |
1022 | api->flags = stream_getl(s); | |
1023 | api->message = stream_getc(s); | |
1024 | api->safi = stream_getw(s); | |
1025 | ||
1026 | /* Prefix. */ | |
1027 | api->prefix.family = stream_getc(s); | |
1028 | switch (api->prefix.family) { | |
1029 | case AF_INET: | |
1030 | api->prefix.prefixlen = MIN(IPV4_MAX_PREFIXLEN, stream_getc(s)); | |
1031 | break; | |
1032 | case AF_INET6: | |
1033 | api->prefix.prefixlen = MIN(IPV6_MAX_PREFIXLEN, stream_getc(s)); | |
1034 | break; | |
1035 | } | |
1036 | stream_get(&api->prefix.u.prefix, s, PSIZE(api->prefix.prefixlen)); | |
1037 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_SRCPFX)) { | |
1038 | api->src_prefix.family = AF_INET6; | |
1039 | api->src_prefix.prefixlen = stream_getc(s); | |
1040 | stream_get(&api->src_prefix.prefix, s, | |
1041 | PSIZE(api->src_prefix.prefixlen)); | |
1042 | ||
1043 | if (api->prefix.family != AF_INET6 | |
1044 | || api->src_prefix.prefixlen == 0) | |
1045 | UNSET_FLAG(api->message, ZAPI_MESSAGE_SRCPFX); | |
1046 | } | |
1047 | ||
1048 | /* Nexthops. */ | |
1049 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) { | |
1050 | api->nexthop_num = stream_getc(s); | |
1051 | if (api->nexthop_num > MULTIPATH_NUM) { | |
1052 | zlog_warn("%s: invalid number of nexthops (%u)", | |
1053 | __func__, api->nexthop_num); | |
1054 | return -1; | |
1055 | } | |
1056 | ||
1057 | for (i = 0; i < api->nexthop_num; i++) { | |
1058 | api_nh = &api->nexthops[i]; | |
1059 | ||
1060 | api_nh->type = stream_getc(s); | |
1061 | switch (api_nh->type) { | |
1062 | case NEXTHOP_TYPE_BLACKHOLE: | |
1063 | break; | |
1064 | case NEXTHOP_TYPE_IPV4: | |
1065 | api_nh->gate.ipv4.s_addr = stream_get_ipv4(s); | |
1066 | break; | |
1067 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1068 | api_nh->gate.ipv4.s_addr = stream_get_ipv4(s); | |
1069 | api_nh->ifindex = stream_getl(s); | |
1070 | break; | |
1071 | case NEXTHOP_TYPE_IFINDEX: | |
1072 | api_nh->ifindex = stream_getl(s); | |
1073 | break; | |
1074 | case NEXTHOP_TYPE_IPV6: | |
1075 | stream_get(&api_nh->gate.ipv6, s, 16); | |
1076 | break; | |
1077 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1078 | stream_get(&api_nh->gate.ipv6, s, 16); | |
1079 | api_nh->ifindex = stream_getl(s); | |
1080 | break; | |
1081 | } | |
1082 | ||
1083 | /* MPLS labels for BGP-LU or Segment Routing */ | |
1084 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL)) { | |
1085 | api_nh->label_num = stream_getc(s); | |
1086 | ||
1087 | if (api_nh->label_num > MPLS_MAX_LABELS) { | |
1088 | zlog_warn( | |
1089 | "%s: invalid number of MPLS " | |
1090 | "labels (%u)", | |
1091 | __func__, api_nh->label_num); | |
1092 | return -1; | |
1093 | } | |
1094 | ||
1095 | stream_get(&api_nh->labels[0], s, | |
1096 | api_nh->label_num | |
1097 | * sizeof(mpls_label_t)); | |
1098 | } | |
1099 | } | |
1100 | } | |
1101 | ||
1102 | /* Attributes. */ | |
1103 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_DISTANCE)) | |
1104 | api->distance = stream_getc(s); | |
1105 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_METRIC)) | |
1106 | api->metric = stream_getl(s); | |
1107 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_TAG)) | |
1108 | api->tag = stream_getl(s); | |
1109 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_MTU)) | |
1110 | api->mtu = stream_getl(s); | |
1111 | ||
1112 | return 0; | |
1113 | } | |
1114 | ||
1115 | /* | |
1116 | * send a ZEBRA_REDISTRIBUTE_ADD or ZEBRA_REDISTRIBUTE_DELETE | |
1117 | * for the route type (ZEBRA_ROUTE_KERNEL etc.). The zebra server will | |
1118 | * then set/unset redist[type] in the client handle (a struct zserv) for the | |
1119 | * sending client | |
1120 | */ | |
1121 | int zebra_redistribute_send(int command, struct zclient *zclient, afi_t afi, | |
1122 | int type, u_short instance, vrf_id_t vrf_id) | |
1123 | { | |
1124 | struct stream *s; | |
1125 | ||
1126 | s = zclient->obuf; | |
1127 | stream_reset(s); | |
1128 | ||
1129 | zclient_create_header(s, command, vrf_id); | |
1130 | stream_putc(s, afi); | |
1131 | stream_putc(s, type); | |
1132 | stream_putw(s, instance); | |
1133 | ||
1134 | stream_putw_at(s, 0, stream_get_endp(s)); | |
1135 | ||
1136 | return zclient_send_message(zclient); | |
1137 | } | |
1138 | ||
1139 | /* Get prefix in ZServ format; family should be filled in on prefix */ | |
1140 | static void zclient_stream_get_prefix(struct stream *s, struct prefix *p) | |
1141 | { | |
1142 | size_t plen = prefix_blen(p); | |
1143 | u_char c; | |
1144 | p->prefixlen = 0; | |
1145 | ||
1146 | if (plen == 0) | |
1147 | return; | |
1148 | ||
1149 | stream_get(&p->u.prefix, s, plen); | |
1150 | c = stream_getc(s); | |
1151 | p->prefixlen = MIN(plen * 8, c); | |
1152 | } | |
1153 | ||
1154 | /* Router-id update from zebra daemon. */ | |
1155 | void zebra_router_id_update_read(struct stream *s, struct prefix *rid) | |
1156 | { | |
1157 | /* Fetch interface address. */ | |
1158 | rid->family = stream_getc(s); | |
1159 | ||
1160 | zclient_stream_get_prefix(s, rid); | |
1161 | } | |
1162 | ||
1163 | /* Interface addition from zebra daemon. */ | |
1164 | /* | |
1165 | * The format of the message sent with type ZEBRA_INTERFACE_ADD or | |
1166 | * ZEBRA_INTERFACE_DELETE from zebra to the client is: | |
1167 | * 0 1 2 3 | |
1168 | * 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 | |
1169 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1170 | * | ifname | | |
1171 | * | | | |
1172 | * | | | |
1173 | * | | | |
1174 | * | | | |
1175 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1176 | * | ifindex | | |
1177 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1178 | * | status | | |
1179 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1180 | * | if_flags | | |
1181 | * | | | |
1182 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1183 | * | metric | | |
1184 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1185 | * | speed | | |
1186 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1187 | * | ifmtu | | |
1188 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1189 | * | ifmtu6 | | |
1190 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1191 | * | bandwidth | | |
1192 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1193 | * | Link Layer Type | | |
1194 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1195 | * | Harware Address Length | | |
1196 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1197 | * | Hardware Address if HW lenght different from 0 | | |
1198 | * | ... max INTERFACE_HWADDR_MAX | | |
1199 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1200 | * | Link_params? | Whether a link-params follows: 1 or 0. | |
1201 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1202 | * | Link_params 0 or 1 INTERFACE_LINK_PARAMS_SIZE sized | | |
1203 | * | .... (struct if_link_params). | | |
1204 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1205 | */ | |
1206 | ||
1207 | static void zclient_vrf_add(struct zclient *zclient, vrf_id_t vrf_id) | |
1208 | { | |
1209 | struct vrf *vrf; | |
1210 | char vrfname_tmp[VRF_NAMSIZ]; | |
1211 | struct vrf_data data; | |
1212 | ||
1213 | stream_get(&data, zclient->ibuf, sizeof(struct vrf_data)); | |
1214 | /* Read interface name. */ | |
1215 | stream_get(vrfname_tmp, zclient->ibuf, VRF_NAMSIZ); | |
1216 | ||
1217 | /* Lookup/create vrf by vrf_id. */ | |
1218 | vrf = vrf_get(vrf_id, vrfname_tmp); | |
1219 | vrf->data = data; | |
1220 | ||
1221 | vrf_enable(vrf); | |
1222 | } | |
1223 | ||
1224 | static void zclient_vrf_delete(struct zclient *zclient, vrf_id_t vrf_id) | |
1225 | { | |
1226 | struct vrf *vrf; | |
1227 | ||
1228 | /* Lookup vrf by vrf_id. */ | |
1229 | vrf = vrf_lookup_by_id(vrf_id); | |
1230 | ||
1231 | /* | |
1232 | * If a routing protocol doesn't know about a | |
1233 | * vrf that is about to be deleted. There is | |
1234 | * no point in attempting to delete it. | |
1235 | */ | |
1236 | if (!vrf) | |
1237 | return; | |
1238 | ||
1239 | vrf_delete(vrf); | |
1240 | } | |
1241 | ||
1242 | struct interface *zebra_interface_add_read(struct stream *s, vrf_id_t vrf_id) | |
1243 | { | |
1244 | struct interface *ifp; | |
1245 | char ifname_tmp[INTERFACE_NAMSIZ]; | |
1246 | ||
1247 | /* Read interface name. */ | |
1248 | stream_get(ifname_tmp, s, INTERFACE_NAMSIZ); | |
1249 | ||
1250 | /* Lookup/create interface by name. */ | |
1251 | ifp = if_get_by_name_len( | |
1252 | ifname_tmp, strnlen(ifname_tmp, INTERFACE_NAMSIZ), vrf_id, 0); | |
1253 | ||
1254 | zebra_interface_if_set_value(s, ifp); | |
1255 | ||
1256 | return ifp; | |
1257 | } | |
1258 | ||
1259 | /* | |
1260 | * Read interface up/down msg (ZEBRA_INTERFACE_UP/ZEBRA_INTERFACE_DOWN) | |
1261 | * from zebra server. The format of this message is the same as | |
1262 | * that sent for ZEBRA_INTERFACE_ADD/ZEBRA_INTERFACE_DELETE (see | |
1263 | * comments for zebra_interface_add_read), except that no sockaddr_dl | |
1264 | * is sent at the tail of the message. | |
1265 | */ | |
1266 | struct interface *zebra_interface_state_read(struct stream *s, vrf_id_t vrf_id) | |
1267 | { | |
1268 | struct interface *ifp; | |
1269 | char ifname_tmp[INTERFACE_NAMSIZ]; | |
1270 | ||
1271 | /* Read interface name. */ | |
1272 | stream_get(ifname_tmp, s, INTERFACE_NAMSIZ); | |
1273 | ||
1274 | /* Lookup this by interface index. */ | |
1275 | ifp = if_lookup_by_name_len( | |
1276 | ifname_tmp, strnlen(ifname_tmp, INTERFACE_NAMSIZ), vrf_id); | |
1277 | if (ifp == NULL) { | |
1278 | zlog_warn("INTERFACE_STATE: Cannot find IF %s in VRF %d", | |
1279 | ifname_tmp, vrf_id); | |
1280 | return NULL; | |
1281 | } | |
1282 | ||
1283 | zebra_interface_if_set_value(s, ifp); | |
1284 | ||
1285 | return ifp; | |
1286 | } | |
1287 | ||
1288 | static void link_params_set_value(struct stream *s, struct if_link_params *iflp) | |
1289 | { | |
1290 | ||
1291 | if (iflp == NULL) | |
1292 | return; | |
1293 | ||
1294 | iflp->lp_status = stream_getl(s); | |
1295 | iflp->te_metric = stream_getl(s); | |
1296 | iflp->max_bw = stream_getf(s); | |
1297 | iflp->max_rsv_bw = stream_getf(s); | |
1298 | uint32_t bwclassnum = stream_getl(s); | |
1299 | { | |
1300 | unsigned int i; | |
1301 | for (i = 0; i < bwclassnum && i < MAX_CLASS_TYPE; i++) | |
1302 | iflp->unrsv_bw[i] = stream_getf(s); | |
1303 | if (i < bwclassnum) | |
1304 | zlog_err( | |
1305 | "%s: received %d > %d (MAX_CLASS_TYPE) bw entries" | |
1306 | " - outdated library?", | |
1307 | __func__, bwclassnum, MAX_CLASS_TYPE); | |
1308 | } | |
1309 | iflp->admin_grp = stream_getl(s); | |
1310 | iflp->rmt_as = stream_getl(s); | |
1311 | iflp->rmt_ip.s_addr = stream_get_ipv4(s); | |
1312 | ||
1313 | iflp->av_delay = stream_getl(s); | |
1314 | iflp->min_delay = stream_getl(s); | |
1315 | iflp->max_delay = stream_getl(s); | |
1316 | iflp->delay_var = stream_getl(s); | |
1317 | ||
1318 | iflp->pkt_loss = stream_getf(s); | |
1319 | iflp->res_bw = stream_getf(s); | |
1320 | iflp->ava_bw = stream_getf(s); | |
1321 | iflp->use_bw = stream_getf(s); | |
1322 | } | |
1323 | ||
1324 | struct interface *zebra_interface_link_params_read(struct stream *s) | |
1325 | { | |
1326 | struct if_link_params *iflp; | |
1327 | ifindex_t ifindex; | |
1328 | ||
1329 | assert(s); | |
1330 | ||
1331 | ifindex = stream_getl(s); | |
1332 | ||
1333 | struct interface *ifp = if_lookup_by_index(ifindex, VRF_DEFAULT); | |
1334 | ||
1335 | if (ifp == NULL) { | |
1336 | zlog_err("%s: unknown ifindex %u, shouldn't happen", __func__, | |
1337 | ifindex); | |
1338 | return NULL; | |
1339 | } | |
1340 | ||
1341 | if ((iflp = if_link_params_get(ifp)) == NULL) | |
1342 | return NULL; | |
1343 | ||
1344 | link_params_set_value(s, iflp); | |
1345 | ||
1346 | return ifp; | |
1347 | } | |
1348 | ||
1349 | void zebra_interface_if_set_value(struct stream *s, struct interface *ifp) | |
1350 | { | |
1351 | u_char link_params_status = 0; | |
1352 | ||
1353 | /* Read interface's index. */ | |
1354 | ifp->ifindex = stream_getl(s); | |
1355 | ifp->status = stream_getc(s); | |
1356 | ||
1357 | /* Read interface's value. */ | |
1358 | ifp->flags = stream_getq(s); | |
1359 | ifp->ptm_enable = stream_getc(s); | |
1360 | ifp->ptm_status = stream_getc(s); | |
1361 | ifp->metric = stream_getl(s); | |
1362 | ifp->speed = stream_getl(s); | |
1363 | ifp->mtu = stream_getl(s); | |
1364 | ifp->mtu6 = stream_getl(s); | |
1365 | ifp->bandwidth = stream_getl(s); | |
1366 | ifp->ll_type = stream_getl(s); | |
1367 | ifp->hw_addr_len = stream_getl(s); | |
1368 | if (ifp->hw_addr_len) | |
1369 | stream_get(ifp->hw_addr, s, | |
1370 | MIN(ifp->hw_addr_len, INTERFACE_HWADDR_MAX)); | |
1371 | ||
1372 | /* Read Traffic Engineering status */ | |
1373 | link_params_status = stream_getc(s); | |
1374 | /* Then, Traffic Engineering parameters if any */ | |
1375 | if (link_params_status) { | |
1376 | struct if_link_params *iflp = if_link_params_get(ifp); | |
1377 | link_params_set_value(s, iflp); | |
1378 | } | |
1379 | } | |
1380 | ||
1381 | size_t zebra_interface_link_params_write(struct stream *s, | |
1382 | struct interface *ifp) | |
1383 | { | |
1384 | size_t w; | |
1385 | struct if_link_params *iflp; | |
1386 | int i; | |
1387 | ||
1388 | if (s == NULL || ifp == NULL || ifp->link_params == NULL) | |
1389 | return 0; | |
1390 | ||
1391 | iflp = ifp->link_params; | |
1392 | w = 0; | |
1393 | ||
1394 | w += stream_putl(s, iflp->lp_status); | |
1395 | ||
1396 | w += stream_putl(s, iflp->te_metric); | |
1397 | w += stream_putf(s, iflp->max_bw); | |
1398 | w += stream_putf(s, iflp->max_rsv_bw); | |
1399 | ||
1400 | w += stream_putl(s, MAX_CLASS_TYPE); | |
1401 | for (i = 0; i < MAX_CLASS_TYPE; i++) | |
1402 | w += stream_putf(s, iflp->unrsv_bw[i]); | |
1403 | ||
1404 | w += stream_putl(s, iflp->admin_grp); | |
1405 | w += stream_putl(s, iflp->rmt_as); | |
1406 | w += stream_put_in_addr(s, &iflp->rmt_ip); | |
1407 | ||
1408 | w += stream_putl(s, iflp->av_delay); | |
1409 | w += stream_putl(s, iflp->min_delay); | |
1410 | w += stream_putl(s, iflp->max_delay); | |
1411 | w += stream_putl(s, iflp->delay_var); | |
1412 | ||
1413 | w += stream_putf(s, iflp->pkt_loss); | |
1414 | w += stream_putf(s, iflp->res_bw); | |
1415 | w += stream_putf(s, iflp->ava_bw); | |
1416 | w += stream_putf(s, iflp->use_bw); | |
1417 | ||
1418 | return w; | |
1419 | } | |
1420 | ||
1421 | /* | |
1422 | * format of message for address additon is: | |
1423 | * 0 | |
1424 | * 0 1 2 3 4 5 6 7 | |
1425 | * +-+-+-+-+-+-+-+-+ | |
1426 | * | type | ZEBRA_INTERFACE_ADDRESS_ADD or | |
1427 | * +-+-+-+-+-+-+-+-+ ZEBRA_INTERFACE_ADDRES_DELETE | |
1428 | * | | | |
1429 | * + + | |
1430 | * | ifindex | | |
1431 | * + + | |
1432 | * | | | |
1433 | * + + | |
1434 | * | | | |
1435 | * +-+-+-+-+-+-+-+-+ | |
1436 | * | ifc_flags | flags for connected address | |
1437 | * +-+-+-+-+-+-+-+-+ | |
1438 | * | addr_family | | |
1439 | * +-+-+-+-+-+-+-+-+ | |
1440 | * | addr... | | |
1441 | * : : | |
1442 | * | | | |
1443 | * +-+-+-+-+-+-+-+-+ | |
1444 | * | addr_len | len of addr. E.g., addr_len = 4 for ipv4 addrs. | |
1445 | * +-+-+-+-+-+-+-+-+ | |
1446 | * | daddr.. | | |
1447 | * : : | |
1448 | * | | | |
1449 | * +-+-+-+-+-+-+-+-+ | |
1450 | */ | |
1451 | ||
1452 | static int memconstant(const void *s, int c, size_t n) | |
1453 | { | |
1454 | const u_char *p = s; | |
1455 | ||
1456 | while (n-- > 0) | |
1457 | if (*p++ != c) | |
1458 | return 0; | |
1459 | return 1; | |
1460 | } | |
1461 | ||
1462 | ||
1463 | struct connected *zebra_interface_address_read(int type, struct stream *s, | |
1464 | vrf_id_t vrf_id) | |
1465 | { | |
1466 | ifindex_t ifindex; | |
1467 | struct interface *ifp; | |
1468 | struct connected *ifc; | |
1469 | struct prefix p, d, *dp; | |
1470 | int plen; | |
1471 | u_char ifc_flags; | |
1472 | ||
1473 | memset(&p, 0, sizeof(p)); | |
1474 | memset(&d, 0, sizeof(d)); | |
1475 | ||
1476 | /* Get interface index. */ | |
1477 | ifindex = stream_getl(s); | |
1478 | ||
1479 | /* Lookup index. */ | |
1480 | ifp = if_lookup_by_index(ifindex, vrf_id); | |
1481 | if (ifp == NULL) { | |
1482 | zlog_warn("INTERFACE_ADDRESS_%s: Cannot find IF %u in VRF %d", | |
1483 | (type == ZEBRA_INTERFACE_ADDRESS_ADD) ? "ADD" : "DEL", | |
1484 | ifindex, vrf_id); | |
1485 | return NULL; | |
1486 | } | |
1487 | ||
1488 | /* Fetch flag. */ | |
1489 | ifc_flags = stream_getc(s); | |
1490 | ||
1491 | /* Fetch interface address. */ | |
1492 | d.family = p.family = stream_getc(s); | |
1493 | plen = prefix_blen(&d); | |
1494 | ||
1495 | zclient_stream_get_prefix(s, &p); | |
1496 | ||
1497 | /* Fetch destination address. */ | |
1498 | stream_get(&d.u.prefix, s, plen); | |
1499 | ||
1500 | /* N.B. NULL destination pointers are encoded as all zeroes */ | |
1501 | dp = memconstant(&d.u.prefix, 0, plen) ? NULL : &d; | |
1502 | ||
1503 | if (type == ZEBRA_INTERFACE_ADDRESS_ADD) { | |
1504 | ifc = connected_lookup_prefix_exact(ifp, &p); | |
1505 | if (!ifc) { | |
1506 | /* N.B. NULL destination pointers are encoded as all | |
1507 | * zeroes */ | |
1508 | ifc = connected_add_by_prefix(ifp, &p, dp); | |
1509 | } | |
1510 | if (ifc) { | |
1511 | ifc->flags = ifc_flags; | |
1512 | if (ifc->destination) | |
1513 | ifc->destination->prefixlen = | |
1514 | ifc->address->prefixlen; | |
1515 | else if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_PEER)) { | |
1516 | /* carp interfaces on OpenBSD with 0.0.0.0/0 as | |
1517 | * "peer" */ | |
1518 | char buf[PREFIX_STRLEN]; | |
1519 | zlog_warn( | |
1520 | "warning: interface %s address %s " | |
1521 | "with peer flag set, but no peer address!", | |
1522 | ifp->name, prefix2str(ifc->address, buf, | |
1523 | sizeof buf)); | |
1524 | UNSET_FLAG(ifc->flags, ZEBRA_IFA_PEER); | |
1525 | } | |
1526 | } | |
1527 | } else { | |
1528 | assert(type == ZEBRA_INTERFACE_ADDRESS_DELETE); | |
1529 | ifc = connected_delete_by_prefix(ifp, &p); | |
1530 | } | |
1531 | ||
1532 | return ifc; | |
1533 | } | |
1534 | ||
1535 | /* | |
1536 | * format of message for neighbor connected address is: | |
1537 | * 0 | |
1538 | * 0 1 2 3 4 5 6 7 | |
1539 | * +-+-+-+-+-+-+-+-+ | |
1540 | * | type | ZEBRA_INTERFACE_NBR_ADDRESS_ADD or | |
1541 | * +-+-+-+-+-+-+-+-+ ZEBRA_INTERFACE_NBR_ADDRES_DELETE | |
1542 | * | | | |
1543 | * + + | |
1544 | * | ifindex | | |
1545 | * + + | |
1546 | * | | | |
1547 | * + + | |
1548 | * | | | |
1549 | * +-+-+-+-+-+-+-+-+ | |
1550 | * | addr_family | | |
1551 | * +-+-+-+-+-+-+-+-+ | |
1552 | * | addr... | | |
1553 | * : : | |
1554 | * | | | |
1555 | * +-+-+-+-+-+-+-+-+ | |
1556 | * | addr_len | len of addr. | |
1557 | * +-+-+-+-+-+-+-+-+ | |
1558 | */ | |
1559 | struct nbr_connected * | |
1560 | zebra_interface_nbr_address_read(int type, struct stream *s, vrf_id_t vrf_id) | |
1561 | { | |
1562 | unsigned int ifindex; | |
1563 | struct interface *ifp; | |
1564 | struct prefix p; | |
1565 | struct nbr_connected *ifc; | |
1566 | ||
1567 | /* Get interface index. */ | |
1568 | ifindex = stream_getl(s); | |
1569 | ||
1570 | /* Lookup index. */ | |
1571 | ifp = if_lookup_by_index(ifindex, vrf_id); | |
1572 | if (ifp == NULL) { | |
1573 | zlog_warn("INTERFACE_NBR_%s: Cannot find IF %u in VRF %d", | |
1574 | (type == ZEBRA_INTERFACE_NBR_ADDRESS_ADD) ? "ADD" | |
1575 | : "DELETE", | |
1576 | ifindex, vrf_id); | |
1577 | return NULL; | |
1578 | } | |
1579 | ||
1580 | p.family = stream_getc(s); | |
1581 | stream_get(&p.u.prefix, s, prefix_blen(&p)); | |
1582 | p.prefixlen = stream_getc(s); | |
1583 | ||
1584 | if (type == ZEBRA_INTERFACE_NBR_ADDRESS_ADD) { | |
1585 | /* Currently only supporting P2P links, so any new RA source | |
1586 | address is | |
1587 | considered as the replacement of the previously learnt | |
1588 | Link-Local address. */ | |
1589 | if (!(ifc = listnode_head(ifp->nbr_connected))) { | |
1590 | ifc = nbr_connected_new(); | |
1591 | ifc->address = prefix_new(); | |
1592 | ifc->ifp = ifp; | |
1593 | listnode_add(ifp->nbr_connected, ifc); | |
1594 | } | |
1595 | ||
1596 | prefix_copy(ifc->address, &p); | |
1597 | } else { | |
1598 | assert(type == ZEBRA_INTERFACE_NBR_ADDRESS_DELETE); | |
1599 | ||
1600 | ifc = nbr_connected_check(ifp, &p); | |
1601 | if (ifc) | |
1602 | listnode_delete(ifp->nbr_connected, ifc); | |
1603 | } | |
1604 | ||
1605 | return ifc; | |
1606 | } | |
1607 | ||
1608 | struct interface *zebra_interface_vrf_update_read(struct stream *s, | |
1609 | vrf_id_t vrf_id, | |
1610 | vrf_id_t *new_vrf_id) | |
1611 | { | |
1612 | unsigned int ifindex; | |
1613 | struct interface *ifp; | |
1614 | vrf_id_t new_id = VRF_DEFAULT; | |
1615 | ||
1616 | /* Get interface index. */ | |
1617 | ifindex = stream_getl(s); | |
1618 | ||
1619 | /* Lookup interface. */ | |
1620 | ifp = if_lookup_by_index(ifindex, vrf_id); | |
1621 | if (ifp == NULL) { | |
1622 | zlog_warn("INTERFACE_VRF_UPDATE: Cannot find IF %u in VRF %d", | |
1623 | ifindex, vrf_id); | |
1624 | return NULL; | |
1625 | } | |
1626 | ||
1627 | /* Fetch new VRF Id. */ | |
1628 | new_id = stream_getw(s); | |
1629 | ||
1630 | *new_vrf_id = new_id; | |
1631 | return ifp; | |
1632 | } | |
1633 | ||
1634 | /* filter unwanted messages until the expected one arrives */ | |
1635 | static int zclient_read_sync_response(struct zclient *zclient, | |
1636 | u_int16_t expected_cmd) | |
1637 | { | |
1638 | struct stream *s; | |
1639 | u_int16_t size; | |
1640 | u_char marker; | |
1641 | u_char version; | |
1642 | vrf_id_t vrf_id; | |
1643 | u_int16_t cmd; | |
1644 | fd_set readfds; | |
1645 | int ret; | |
1646 | ||
1647 | ret = 0; | |
1648 | cmd = expected_cmd + 1; | |
1649 | while (ret == 0 && cmd != expected_cmd) { | |
1650 | s = zclient->ibuf; | |
1651 | stream_reset(s); | |
1652 | ||
1653 | /* wait until response arrives */ | |
1654 | FD_ZERO(&readfds); | |
1655 | FD_SET(zclient->sock, &readfds); | |
1656 | select(zclient->sock + 1, &readfds, NULL, NULL, NULL); | |
1657 | if (!FD_ISSET(zclient->sock, &readfds)) | |
1658 | continue; | |
1659 | /* read response */ | |
1660 | ret = zclient_read_header(s, zclient->sock, &size, &marker, | |
1661 | &version, &vrf_id, &cmd); | |
1662 | if (zclient_debug) | |
1663 | zlog_debug("%s: Response (%d bytes) received", __func__, | |
1664 | size); | |
1665 | } | |
1666 | if (ret != 0) { | |
1667 | zlog_err("%s: Invalid Sync Message Reply", __func__); | |
1668 | return -1; | |
1669 | } | |
1670 | ||
1671 | return 0; | |
1672 | } | |
1673 | /** | |
1674 | * Connect to label manager in a syncronous way | |
1675 | * | |
1676 | * It first writes the request to zcient output buffer and then | |
1677 | * immediately reads the answer from the input buffer. | |
1678 | * | |
1679 | * @param zclient Zclient used to connect to label manager (zebra) | |
1680 | * @result Result of response | |
1681 | */ | |
1682 | int lm_label_manager_connect(struct zclient *zclient) | |
1683 | { | |
1684 | int ret; | |
1685 | struct stream *s; | |
1686 | u_char result; | |
1687 | ||
1688 | if (zclient_debug) | |
1689 | zlog_debug("Connecting to Label Manager"); | |
1690 | ||
1691 | if (zclient->sock < 0) | |
1692 | return -1; | |
1693 | ||
1694 | /* send request */ | |
1695 | s = zclient->obuf; | |
1696 | stream_reset(s); | |
1697 | zclient_create_header(s, ZEBRA_LABEL_MANAGER_CONNECT, VRF_DEFAULT); | |
1698 | ||
1699 | /* proto */ | |
1700 | stream_putc(s, zclient->redist_default); | |
1701 | /* instance */ | |
1702 | stream_putw(s, zclient->instance); | |
1703 | ||
1704 | /* Put length at the first point of the stream. */ | |
1705 | stream_putw_at(s, 0, stream_get_endp(s)); | |
1706 | ||
1707 | ret = writen(zclient->sock, s->data, stream_get_endp(s)); | |
1708 | if (ret < 0) { | |
1709 | zlog_err("%s: can't write to zclient->sock", __func__); | |
1710 | close(zclient->sock); | |
1711 | zclient->sock = -1; | |
1712 | return -1; | |
1713 | } | |
1714 | if (ret == 0) { | |
1715 | zlog_err("%s: zclient->sock connection closed", __func__); | |
1716 | close(zclient->sock); | |
1717 | zclient->sock = -1; | |
1718 | return -1; | |
1719 | } | |
1720 | if (zclient_debug) | |
1721 | zlog_debug("%s: Label manager connect request (%d bytes) sent", | |
1722 | __func__, ret); | |
1723 | ||
1724 | /* read response */ | |
1725 | if (zclient_read_sync_response(zclient, ZEBRA_LABEL_MANAGER_CONNECT) | |
1726 | != 0) | |
1727 | return -1; | |
1728 | ||
1729 | /* result */ | |
1730 | s = zclient->ibuf; | |
1731 | result = stream_getc(s); | |
1732 | if (zclient_debug) | |
1733 | zlog_debug( | |
1734 | "%s: Label Manager connect response received, result %u", | |
1735 | __func__, result); | |
1736 | ||
1737 | return (int)result; | |
1738 | } | |
1739 | ||
1740 | /** | |
1741 | * Function to request a label chunk in a syncronous way | |
1742 | * | |
1743 | * It first writes the request to zlcient output buffer and then | |
1744 | * immediately reads the answer from the input buffer. | |
1745 | * | |
1746 | * @param zclient Zclient used to connect to label manager (zebra) | |
1747 | * @param keep Avoid garbage collection | |
1748 | * @param chunk_size Amount of labels requested | |
1749 | * @param start To write first assigned chunk label to | |
1750 | * @param end To write last assigned chunk label to | |
1751 | * @result 0 on success, -1 otherwise | |
1752 | */ | |
1753 | int lm_get_label_chunk(struct zclient *zclient, u_char keep, | |
1754 | uint32_t chunk_size, uint32_t *start, uint32_t *end) | |
1755 | { | |
1756 | int ret; | |
1757 | struct stream *s; | |
1758 | u_char response_keep; | |
1759 | ||
1760 | if (zclient_debug) | |
1761 | zlog_debug("Getting Label Chunk"); | |
1762 | ||
1763 | if (zclient->sock < 0) | |
1764 | return -1; | |
1765 | ||
1766 | /* send request */ | |
1767 | s = zclient->obuf; | |
1768 | stream_reset(s); | |
1769 | zclient_create_header(s, ZEBRA_GET_LABEL_CHUNK, VRF_DEFAULT); | |
1770 | /* keep */ | |
1771 | stream_putc(s, keep); | |
1772 | /* chunk size */ | |
1773 | stream_putl(s, chunk_size); | |
1774 | /* Put length at the first point of the stream. */ | |
1775 | stream_putw_at(s, 0, stream_get_endp(s)); | |
1776 | ||
1777 | ret = writen(zclient->sock, s->data, stream_get_endp(s)); | |
1778 | if (ret < 0) { | |
1779 | zlog_err("%s: can't write to zclient->sock", __func__); | |
1780 | close(zclient->sock); | |
1781 | zclient->sock = -1; | |
1782 | return -1; | |
1783 | } | |
1784 | if (ret == 0) { | |
1785 | zlog_err("%s: zclient->sock connection closed", __func__); | |
1786 | close(zclient->sock); | |
1787 | zclient->sock = -1; | |
1788 | return -1; | |
1789 | } | |
1790 | if (zclient_debug) | |
1791 | zlog_debug("%s: Label chunk request (%d bytes) sent", __func__, | |
1792 | ret); | |
1793 | ||
1794 | /* read response */ | |
1795 | if (zclient_read_sync_response(zclient, ZEBRA_GET_LABEL_CHUNK) != 0) | |
1796 | return -1; | |
1797 | ||
1798 | s = zclient->ibuf; | |
1799 | /* keep */ | |
1800 | response_keep = stream_getc(s); | |
1801 | /* start and end labels */ | |
1802 | *start = stream_getl(s); | |
1803 | *end = stream_getl(s); | |
1804 | ||
1805 | /* not owning this response */ | |
1806 | if (keep != response_keep) { | |
1807 | zlog_err( | |
1808 | "%s: Invalid Label chunk: %u - %u, keeps mismatch %u != %u", | |
1809 | __func__, *start, *end, keep, response_keep); | |
1810 | } | |
1811 | /* sanity */ | |
1812 | if (*start > *end || *start < MPLS_MIN_UNRESERVED_LABEL | |
1813 | || *end > MPLS_MAX_UNRESERVED_LABEL) { | |
1814 | zlog_err("%s: Invalid Label chunk: %u - %u", __func__, *start, | |
1815 | *end); | |
1816 | return -1; | |
1817 | } | |
1818 | ||
1819 | if (zclient_debug) | |
1820 | zlog_debug("Label Chunk assign: %u - %u (%u) ", *start, *end, | |
1821 | response_keep); | |
1822 | ||
1823 | return 0; | |
1824 | } | |
1825 | ||
1826 | /** | |
1827 | * Function to release a label chunk | |
1828 | * | |
1829 | * @param zclient Zclient used to connect to label manager (zebra) | |
1830 | * @param start First label of chunk | |
1831 | * @param end Last label of chunk | |
1832 | * @result 0 on success, -1 otherwise | |
1833 | */ | |
1834 | int lm_release_label_chunk(struct zclient *zclient, uint32_t start, | |
1835 | uint32_t end) | |
1836 | { | |
1837 | int ret; | |
1838 | struct stream *s; | |
1839 | ||
1840 | if (zclient_debug) | |
1841 | zlog_debug("Releasing Label Chunk"); | |
1842 | ||
1843 | if (zclient->sock < 0) | |
1844 | return -1; | |
1845 | ||
1846 | /* send request */ | |
1847 | s = zclient->obuf; | |
1848 | stream_reset(s); | |
1849 | zclient_create_header(s, ZEBRA_RELEASE_LABEL_CHUNK, VRF_DEFAULT); | |
1850 | ||
1851 | /* start */ | |
1852 | stream_putl(s, start); | |
1853 | /* end */ | |
1854 | stream_putl(s, end); | |
1855 | ||
1856 | /* Put length at the first point of the stream. */ | |
1857 | stream_putw_at(s, 0, stream_get_endp(s)); | |
1858 | ||
1859 | ret = writen(zclient->sock, s->data, stream_get_endp(s)); | |
1860 | if (ret < 0) { | |
1861 | zlog_err("%s: can't write to zclient->sock", __func__); | |
1862 | close(zclient->sock); | |
1863 | zclient->sock = -1; | |
1864 | return -1; | |
1865 | } | |
1866 | if (ret == 0) { | |
1867 | zlog_err("%s: zclient->sock connection closed", __func__); | |
1868 | close(zclient->sock); | |
1869 | zclient->sock = -1; | |
1870 | return -1; | |
1871 | } | |
1872 | ||
1873 | return 0; | |
1874 | } | |
1875 | ||
1876 | int zebra_send_pw(struct zclient *zclient, int command, struct zapi_pw *pw) | |
1877 | { | |
1878 | struct stream *s; | |
1879 | ||
1880 | /* Reset stream. */ | |
1881 | s = zclient->obuf; | |
1882 | stream_reset(s); | |
1883 | ||
1884 | zclient_create_header(s, command, VRF_DEFAULT); | |
1885 | stream_write(s, pw->ifname, IF_NAMESIZE); | |
1886 | stream_putl(s, pw->ifindex); | |
1887 | ||
1888 | /* Put type */ | |
1889 | stream_putl(s, pw->type); | |
1890 | ||
1891 | /* Put nexthop */ | |
1892 | stream_putl(s, pw->af); | |
1893 | switch (pw->af) { | |
1894 | case AF_INET: | |
1895 | stream_put_in_addr(s, &pw->nexthop.ipv4); | |
1896 | break; | |
1897 | case AF_INET6: | |
1898 | stream_write(s, (u_char *)&pw->nexthop.ipv6, 16); | |
1899 | break; | |
1900 | default: | |
1901 | zlog_err("%s: unknown af", __func__); | |
1902 | return -1; | |
1903 | } | |
1904 | ||
1905 | /* Put labels */ | |
1906 | stream_putl(s, pw->local_label); | |
1907 | stream_putl(s, pw->remote_label); | |
1908 | ||
1909 | /* Put flags */ | |
1910 | stream_putc(s, pw->flags); | |
1911 | ||
1912 | /* Protocol specific fields */ | |
1913 | stream_write(s, &pw->data, sizeof(union pw_protocol_fields)); | |
1914 | ||
1915 | /* Put length at the first point of the stream. */ | |
1916 | stream_putw_at(s, 0, stream_get_endp(s)); | |
1917 | ||
1918 | return zclient_send_message(zclient); | |
1919 | } | |
1920 | ||
1921 | /* | |
1922 | * Receive PW status update from Zebra and send it to LDE process. | |
1923 | */ | |
1924 | void zebra_read_pw_status_update(int command, struct zclient *zclient, | |
1925 | zebra_size_t length, vrf_id_t vrf_id, | |
1926 | struct zapi_pw_status *pw) | |
1927 | { | |
1928 | struct stream *s; | |
1929 | ||
1930 | memset(pw, 0, sizeof(struct zapi_pw_status)); | |
1931 | s = zclient->ibuf; | |
1932 | ||
1933 | /* Get data. */ | |
1934 | stream_get(pw->ifname, s, IF_NAMESIZE); | |
1935 | pw->ifindex = stream_getl(s); | |
1936 | pw->status = stream_getl(s); | |
1937 | } | |
1938 | ||
1939 | /* Zebra client message read function. */ | |
1940 | static int zclient_read(struct thread *thread) | |
1941 | { | |
1942 | size_t already; | |
1943 | uint16_t length, command; | |
1944 | uint8_t marker, version; | |
1945 | vrf_id_t vrf_id; | |
1946 | struct zclient *zclient; | |
1947 | ||
1948 | /* Get socket to zebra. */ | |
1949 | zclient = THREAD_ARG(thread); | |
1950 | zclient->t_read = NULL; | |
1951 | ||
1952 | /* Read zebra header (if we don't have it already). */ | |
1953 | if ((already = stream_get_endp(zclient->ibuf)) < ZEBRA_HEADER_SIZE) { | |
1954 | ssize_t nbyte; | |
1955 | if (((nbyte = stream_read_try(zclient->ibuf, zclient->sock, | |
1956 | ZEBRA_HEADER_SIZE - already)) | |
1957 | == 0) | |
1958 | || (nbyte == -1)) { | |
1959 | if (zclient_debug) | |
1960 | zlog_debug( | |
1961 | "zclient connection closed socket [%d].", | |
1962 | zclient->sock); | |
1963 | return zclient_failed(zclient); | |
1964 | } | |
1965 | if (nbyte != (ssize_t)(ZEBRA_HEADER_SIZE - already)) { | |
1966 | /* Try again later. */ | |
1967 | zclient_event(ZCLIENT_READ, zclient); | |
1968 | return 0; | |
1969 | } | |
1970 | already = ZEBRA_HEADER_SIZE; | |
1971 | } | |
1972 | ||
1973 | /* Reset to read from the beginning of the incoming packet. */ | |
1974 | stream_set_getp(zclient->ibuf, 0); | |
1975 | ||
1976 | /* Fetch header values. */ | |
1977 | length = stream_getw(zclient->ibuf); | |
1978 | marker = stream_getc(zclient->ibuf); | |
1979 | version = stream_getc(zclient->ibuf); | |
1980 | vrf_id = stream_getw(zclient->ibuf); | |
1981 | command = stream_getw(zclient->ibuf); | |
1982 | ||
1983 | if (marker != ZEBRA_HEADER_MARKER || version != ZSERV_VERSION) { | |
1984 | zlog_err( | |
1985 | "%s: socket %d version mismatch, marker %d, version %d", | |
1986 | __func__, zclient->sock, marker, version); | |
1987 | return zclient_failed(zclient); | |
1988 | } | |
1989 | ||
1990 | if (length < ZEBRA_HEADER_SIZE) { | |
1991 | zlog_err("%s: socket %d message length %u is less than %d ", | |
1992 | __func__, zclient->sock, length, ZEBRA_HEADER_SIZE); | |
1993 | return zclient_failed(zclient); | |
1994 | } | |
1995 | ||
1996 | /* Length check. */ | |
1997 | if (length > STREAM_SIZE(zclient->ibuf)) { | |
1998 | struct stream *ns; | |
1999 | zlog_warn( | |
2000 | "%s: message size %u exceeds buffer size %lu, expanding...", | |
2001 | __func__, length, (u_long)STREAM_SIZE(zclient->ibuf)); | |
2002 | ns = stream_new(length); | |
2003 | stream_copy(ns, zclient->ibuf); | |
2004 | stream_free(zclient->ibuf); | |
2005 | zclient->ibuf = ns; | |
2006 | } | |
2007 | ||
2008 | /* Read rest of zebra packet. */ | |
2009 | if (already < length) { | |
2010 | ssize_t nbyte; | |
2011 | if (((nbyte = stream_read_try(zclient->ibuf, zclient->sock, | |
2012 | length - already)) | |
2013 | == 0) | |
2014 | || (nbyte == -1)) { | |
2015 | if (zclient_debug) | |
2016 | zlog_debug( | |
2017 | "zclient connection closed socket [%d].", | |
2018 | zclient->sock); | |
2019 | return zclient_failed(zclient); | |
2020 | } | |
2021 | if (nbyte != (ssize_t)(length - already)) { | |
2022 | /* Try again later. */ | |
2023 | zclient_event(ZCLIENT_READ, zclient); | |
2024 | return 0; | |
2025 | } | |
2026 | } | |
2027 | ||
2028 | length -= ZEBRA_HEADER_SIZE; | |
2029 | ||
2030 | if (zclient_debug) | |
2031 | zlog_debug("zclient 0x%p command 0x%x VRF %u\n", | |
2032 | (void *)zclient, command, vrf_id); | |
2033 | ||
2034 | switch (command) { | |
2035 | case ZEBRA_ROUTER_ID_UPDATE: | |
2036 | if (zclient->router_id_update) | |
2037 | (*zclient->router_id_update)(command, zclient, length, | |
2038 | vrf_id); | |
2039 | break; | |
2040 | case ZEBRA_VRF_ADD: | |
2041 | zclient_vrf_add(zclient, vrf_id); | |
2042 | break; | |
2043 | case ZEBRA_VRF_DELETE: | |
2044 | zclient_vrf_delete(zclient, vrf_id); | |
2045 | break; | |
2046 | case ZEBRA_INTERFACE_ADD: | |
2047 | if (zclient->interface_add) | |
2048 | (*zclient->interface_add)(command, zclient, length, | |
2049 | vrf_id); | |
2050 | break; | |
2051 | case ZEBRA_INTERFACE_DELETE: | |
2052 | if (zclient->interface_delete) | |
2053 | (*zclient->interface_delete)(command, zclient, length, | |
2054 | vrf_id); | |
2055 | break; | |
2056 | case ZEBRA_INTERFACE_ADDRESS_ADD: | |
2057 | if (zclient->interface_address_add) | |
2058 | (*zclient->interface_address_add)(command, zclient, | |
2059 | length, vrf_id); | |
2060 | break; | |
2061 | case ZEBRA_INTERFACE_ADDRESS_DELETE: | |
2062 | if (zclient->interface_address_delete) | |
2063 | (*zclient->interface_address_delete)(command, zclient, | |
2064 | length, vrf_id); | |
2065 | break; | |
2066 | case ZEBRA_INTERFACE_BFD_DEST_UPDATE: | |
2067 | if (zclient->interface_bfd_dest_update) | |
2068 | (*zclient->interface_bfd_dest_update)(command, zclient, | |
2069 | length, vrf_id); | |
2070 | break; | |
2071 | case ZEBRA_INTERFACE_NBR_ADDRESS_ADD: | |
2072 | if (zclient->interface_nbr_address_add) | |
2073 | (*zclient->interface_nbr_address_add)(command, zclient, | |
2074 | length, vrf_id); | |
2075 | break; | |
2076 | case ZEBRA_INTERFACE_NBR_ADDRESS_DELETE: | |
2077 | if (zclient->interface_nbr_address_delete) | |
2078 | (*zclient->interface_nbr_address_delete)( | |
2079 | command, zclient, length, vrf_id); | |
2080 | break; | |
2081 | case ZEBRA_INTERFACE_UP: | |
2082 | if (zclient->interface_up) | |
2083 | (*zclient->interface_up)(command, zclient, length, | |
2084 | vrf_id); | |
2085 | break; | |
2086 | case ZEBRA_INTERFACE_DOWN: | |
2087 | if (zclient->interface_down) | |
2088 | (*zclient->interface_down)(command, zclient, length, | |
2089 | vrf_id); | |
2090 | break; | |
2091 | case ZEBRA_INTERFACE_VRF_UPDATE: | |
2092 | if (zclient->interface_vrf_update) | |
2093 | (*zclient->interface_vrf_update)(command, zclient, | |
2094 | length, vrf_id); | |
2095 | break; | |
2096 | case ZEBRA_NEXTHOP_UPDATE: | |
2097 | if (zclient_debug) | |
2098 | zlog_debug("zclient rcvd nexthop update\n"); | |
2099 | if (zclient->nexthop_update) | |
2100 | (*zclient->nexthop_update)(command, zclient, length, | |
2101 | vrf_id); | |
2102 | break; | |
2103 | case ZEBRA_IMPORT_CHECK_UPDATE: | |
2104 | if (zclient_debug) | |
2105 | zlog_debug("zclient rcvd import check update\n"); | |
2106 | if (zclient->import_check_update) | |
2107 | (*zclient->import_check_update)(command, zclient, | |
2108 | length, vrf_id); | |
2109 | break; | |
2110 | case ZEBRA_BFD_DEST_REPLAY: | |
2111 | if (zclient->bfd_dest_replay) | |
2112 | (*zclient->bfd_dest_replay)(command, zclient, length, | |
2113 | vrf_id); | |
2114 | break; | |
2115 | case ZEBRA_REDISTRIBUTE_IPV4_ADD: | |
2116 | if (zclient->redistribute_route_ipv4_add) | |
2117 | (*zclient->redistribute_route_ipv4_add)( | |
2118 | command, zclient, length, vrf_id); | |
2119 | break; | |
2120 | case ZEBRA_REDISTRIBUTE_IPV4_DEL: | |
2121 | if (zclient->redistribute_route_ipv4_del) | |
2122 | (*zclient->redistribute_route_ipv4_del)( | |
2123 | command, zclient, length, vrf_id); | |
2124 | break; | |
2125 | case ZEBRA_REDISTRIBUTE_IPV6_ADD: | |
2126 | if (zclient->redistribute_route_ipv6_add) | |
2127 | (*zclient->redistribute_route_ipv6_add)( | |
2128 | command, zclient, length, vrf_id); | |
2129 | break; | |
2130 | case ZEBRA_REDISTRIBUTE_IPV6_DEL: | |
2131 | if (zclient->redistribute_route_ipv6_del) | |
2132 | (*zclient->redistribute_route_ipv6_del)( | |
2133 | command, zclient, length, vrf_id); | |
2134 | break; | |
2135 | case ZEBRA_INTERFACE_LINK_PARAMS: | |
2136 | if (zclient->interface_link_params) | |
2137 | (*zclient->interface_link_params)(command, zclient, | |
2138 | length); | |
2139 | break; | |
2140 | case ZEBRA_FEC_UPDATE: | |
2141 | if (zclient_debug) | |
2142 | zlog_debug("zclient rcvd fec update\n"); | |
2143 | if (zclient->fec_update) | |
2144 | (*zclient->fec_update)(command, zclient, length); | |
2145 | break; | |
2146 | case ZEBRA_VNI_ADD: | |
2147 | if (zclient->local_vni_add) | |
2148 | (*zclient->local_vni_add)(command, zclient, length, | |
2149 | vrf_id); | |
2150 | break; | |
2151 | case ZEBRA_VNI_DEL: | |
2152 | if (zclient->local_vni_del) | |
2153 | (*zclient->local_vni_del)(command, zclient, length, | |
2154 | vrf_id); | |
2155 | break; | |
2156 | case ZEBRA_MACIP_ADD: | |
2157 | if (zclient->local_macip_add) | |
2158 | (*zclient->local_macip_add)(command, zclient, length, | |
2159 | vrf_id); | |
2160 | break; | |
2161 | case ZEBRA_MACIP_DEL: | |
2162 | if (zclient->local_macip_del) | |
2163 | (*zclient->local_macip_del)(command, zclient, length, | |
2164 | vrf_id); | |
2165 | break; | |
2166 | case ZEBRA_PW_STATUS_UPDATE: | |
2167 | if (zclient->pw_status_update) | |
2168 | (*zclient->pw_status_update)(command, zclient, length, | |
2169 | vrf_id); | |
2170 | break; | |
2171 | default: | |
2172 | break; | |
2173 | } | |
2174 | ||
2175 | if (zclient->sock < 0) | |
2176 | /* Connection was closed during packet processing. */ | |
2177 | return -1; | |
2178 | ||
2179 | /* Register read thread. */ | |
2180 | stream_reset(zclient->ibuf); | |
2181 | zclient_event(ZCLIENT_READ, zclient); | |
2182 | ||
2183 | return 0; | |
2184 | } | |
2185 | ||
2186 | void zclient_redistribute(int command, struct zclient *zclient, afi_t afi, | |
2187 | int type, u_short instance, vrf_id_t vrf_id) | |
2188 | { | |
2189 | ||
2190 | if (instance) { | |
2191 | if (command == ZEBRA_REDISTRIBUTE_ADD) { | |
2192 | if (redist_check_instance( | |
2193 | &zclient->mi_redist[afi][type], instance)) | |
2194 | return; | |
2195 | redist_add_instance(&zclient->mi_redist[afi][type], | |
2196 | instance); | |
2197 | } else { | |
2198 | if (!redist_check_instance( | |
2199 | &zclient->mi_redist[afi][type], instance)) | |
2200 | return; | |
2201 | redist_del_instance(&zclient->mi_redist[afi][type], | |
2202 | instance); | |
2203 | } | |
2204 | ||
2205 | } else { | |
2206 | if (command == ZEBRA_REDISTRIBUTE_ADD) { | |
2207 | if (vrf_bitmap_check(zclient->redist[afi][type], | |
2208 | vrf_id)) | |
2209 | return; | |
2210 | vrf_bitmap_set(zclient->redist[afi][type], vrf_id); | |
2211 | } else { | |
2212 | if (!vrf_bitmap_check(zclient->redist[afi][type], | |
2213 | vrf_id)) | |
2214 | return; | |
2215 | vrf_bitmap_unset(zclient->redist[afi][type], vrf_id); | |
2216 | } | |
2217 | } | |
2218 | ||
2219 | if (zclient->sock > 0) | |
2220 | zebra_redistribute_send(command, zclient, afi, type, instance, | |
2221 | vrf_id); | |
2222 | } | |
2223 | ||
2224 | ||
2225 | void zclient_redistribute_default(int command, struct zclient *zclient, | |
2226 | vrf_id_t vrf_id) | |
2227 | { | |
2228 | ||
2229 | if (command == ZEBRA_REDISTRIBUTE_DEFAULT_ADD) { | |
2230 | if (vrf_bitmap_check(zclient->default_information, vrf_id)) | |
2231 | return; | |
2232 | vrf_bitmap_set(zclient->default_information, vrf_id); | |
2233 | } else { | |
2234 | if (!vrf_bitmap_check(zclient->default_information, vrf_id)) | |
2235 | return; | |
2236 | vrf_bitmap_unset(zclient->default_information, vrf_id); | |
2237 | } | |
2238 | ||
2239 | if (zclient->sock > 0) | |
2240 | zebra_message_send(zclient, command, vrf_id); | |
2241 | } | |
2242 | ||
2243 | static void zclient_event(enum event event, struct zclient *zclient) | |
2244 | { | |
2245 | switch (event) { | |
2246 | case ZCLIENT_SCHEDULE: | |
2247 | thread_add_event(zclient->master, zclient_connect, zclient, 0, | |
2248 | &zclient->t_connect); | |
2249 | break; | |
2250 | case ZCLIENT_CONNECT: | |
2251 | if (zclient_debug) | |
2252 | zlog_debug( | |
2253 | "zclient connect failures: %d schedule interval is now %d", | |
2254 | zclient->fail, zclient->fail < 3 ? 10 : 60); | |
2255 | thread_add_timer(zclient->master, zclient_connect, zclient, | |
2256 | zclient->fail < 3 ? 10 : 60, | |
2257 | &zclient->t_connect); | |
2258 | break; | |
2259 | case ZCLIENT_READ: | |
2260 | zclient->t_read = NULL; | |
2261 | thread_add_read(zclient->master, zclient_read, zclient, | |
2262 | zclient->sock, &zclient->t_read); | |
2263 | break; | |
2264 | } | |
2265 | } | |
2266 | ||
2267 | void zclient_interface_set_master(struct zclient *client, | |
2268 | struct interface *master, | |
2269 | struct interface *slave) | |
2270 | { | |
2271 | struct stream *s; | |
2272 | ||
2273 | s = client->obuf; | |
2274 | stream_reset(s); | |
2275 | ||
2276 | zclient_create_header(s, ZEBRA_INTERFACE_SET_MASTER, master->vrf_id); | |
2277 | ||
2278 | stream_putw(s, master->vrf_id); | |
2279 | stream_putl(s, master->ifindex); | |
2280 | stream_putw(s, slave->vrf_id); | |
2281 | stream_putl(s, slave->ifindex); | |
2282 | ||
2283 | stream_putw_at(s, 0, stream_get_endp(s)); | |
2284 | zclient_send_message(client); | |
2285 | } |