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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 | #include "sockopt.h" | |
39 | ||
40 | DEFINE_MTYPE_STATIC(LIB, ZCLIENT, "Zclient") | |
41 | DEFINE_MTYPE_STATIC(LIB, REDIST_INST, "Redistribution instance IDs") | |
42 | ||
43 | /* Zebra client events. */ | |
44 | enum event { ZCLIENT_SCHEDULE, ZCLIENT_READ, ZCLIENT_CONNECT }; | |
45 | ||
46 | /* Prototype for event manager. */ | |
47 | static void zclient_event(enum event, struct zclient *); | |
48 | ||
49 | struct sockaddr_storage zclient_addr; | |
50 | socklen_t zclient_addr_len; | |
51 | ||
52 | /* This file local debug flag. */ | |
53 | int zclient_debug = 0; | |
54 | ||
55 | struct zclient_options zclient_options_default = {.receive_notify = false}; | |
56 | ||
57 | /* Allocate zclient structure. */ | |
58 | struct zclient *zclient_new_notify(struct thread_master *master, | |
59 | struct zclient_options *opt) | |
60 | { | |
61 | struct zclient *zclient; | |
62 | zclient = XCALLOC(MTYPE_ZCLIENT, sizeof(struct zclient)); | |
63 | ||
64 | zclient->ibuf = stream_new(ZEBRA_MAX_PACKET_SIZ); | |
65 | zclient->obuf = stream_new(ZEBRA_MAX_PACKET_SIZ); | |
66 | zclient->wb = buffer_new(0); | |
67 | zclient->master = master; | |
68 | ||
69 | zclient->receive_notify = opt->receive_notify; | |
70 | ||
71 | return zclient; | |
72 | } | |
73 | ||
74 | /* This function is only called when exiting, because | |
75 | many parts of the code do not check for I/O errors, so they could | |
76 | reference an invalid pointer if the structure was ever freed. | |
77 | ||
78 | Free zclient structure. */ | |
79 | void zclient_free(struct zclient *zclient) | |
80 | { | |
81 | if (zclient->ibuf) | |
82 | stream_free(zclient->ibuf); | |
83 | if (zclient->obuf) | |
84 | stream_free(zclient->obuf); | |
85 | if (zclient->wb) | |
86 | buffer_free(zclient->wb); | |
87 | ||
88 | XFREE(MTYPE_ZCLIENT, zclient); | |
89 | } | |
90 | ||
91 | u_short *redist_check_instance(struct redist_proto *red, u_short instance) | |
92 | { | |
93 | struct listnode *node; | |
94 | u_short *id; | |
95 | ||
96 | if (!red->instances) | |
97 | return NULL; | |
98 | ||
99 | for (ALL_LIST_ELEMENTS_RO(red->instances, node, id)) | |
100 | if (*id == instance) | |
101 | return id; | |
102 | ||
103 | return NULL; | |
104 | } | |
105 | ||
106 | void redist_add_instance(struct redist_proto *red, u_short instance) | |
107 | { | |
108 | u_short *in; | |
109 | ||
110 | red->enabled = 1; | |
111 | ||
112 | if (!red->instances) | |
113 | red->instances = list_new(); | |
114 | ||
115 | in = XMALLOC(MTYPE_REDIST_INST, sizeof(u_short)); | |
116 | *in = instance; | |
117 | listnode_add(red->instances, in); | |
118 | } | |
119 | ||
120 | void redist_del_instance(struct redist_proto *red, u_short instance) | |
121 | { | |
122 | u_short *id; | |
123 | ||
124 | id = redist_check_instance(red, instance); | |
125 | if (!id) | |
126 | return; | |
127 | ||
128 | listnode_delete(red->instances, id); | |
129 | XFREE(MTYPE_REDIST_INST, id); | |
130 | if (!red->instances->count) { | |
131 | red->enabled = 0; | |
132 | list_delete_and_null(&red->instances); | |
133 | } | |
134 | } | |
135 | ||
136 | /* Stop zebra client services. */ | |
137 | void zclient_stop(struct zclient *zclient) | |
138 | { | |
139 | afi_t afi; | |
140 | int i; | |
141 | ||
142 | if (zclient_debug) | |
143 | zlog_debug("zclient stopped"); | |
144 | ||
145 | /* Stop threads. */ | |
146 | THREAD_OFF(zclient->t_read); | |
147 | THREAD_OFF(zclient->t_connect); | |
148 | THREAD_OFF(zclient->t_write); | |
149 | ||
150 | /* Reset streams. */ | |
151 | stream_reset(zclient->ibuf); | |
152 | stream_reset(zclient->obuf); | |
153 | ||
154 | /* Empty the write buffer. */ | |
155 | buffer_reset(zclient->wb); | |
156 | ||
157 | /* Close socket. */ | |
158 | if (zclient->sock >= 0) { | |
159 | close(zclient->sock); | |
160 | zclient->sock = -1; | |
161 | } | |
162 | zclient->fail = 0; | |
163 | ||
164 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
165 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) { | |
166 | vrf_bitmap_free(zclient->redist[afi][i]); | |
167 | zclient->redist[afi][i] = VRF_BITMAP_NULL; | |
168 | } | |
169 | redist_del_instance( | |
170 | &zclient->mi_redist[afi][zclient->redist_default], | |
171 | zclient->instance); | |
172 | } | |
173 | ||
174 | vrf_bitmap_free(zclient->default_information); | |
175 | zclient->default_information = VRF_BITMAP_NULL; | |
176 | } | |
177 | ||
178 | void zclient_reset(struct zclient *zclient) | |
179 | { | |
180 | afi_t afi; | |
181 | ||
182 | zclient_stop(zclient); | |
183 | ||
184 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
185 | redist_del_instance( | |
186 | &zclient->mi_redist[afi][zclient->redist_default], | |
187 | zclient->instance); | |
188 | ||
189 | zclient_init(zclient, zclient->redist_default, zclient->instance, | |
190 | zclient->privs); | |
191 | } | |
192 | ||
193 | /** | |
194 | * Connect to zebra daemon. | |
195 | * @param zclient a pointer to zclient structure | |
196 | * @return socket fd just to make sure that connection established | |
197 | * @see zclient_init | |
198 | * @see zclient_new_notify | |
199 | */ | |
200 | int zclient_socket_connect(struct zclient *zclient) | |
201 | { | |
202 | int sock; | |
203 | int ret; | |
204 | ||
205 | /* We should think about IPv6 connection. */ | |
206 | sock = socket(zclient_addr.ss_family, SOCK_STREAM, 0); | |
207 | if (sock < 0) | |
208 | return -1; | |
209 | ||
210 | set_cloexec(sock); | |
211 | ||
212 | zclient->privs->change(ZPRIVS_RAISE); | |
213 | setsockopt_so_sendbuf(sock, 1048576); | |
214 | zclient->privs->change(ZPRIVS_LOWER); | |
215 | ||
216 | /* Connect to zebra. */ | |
217 | ret = connect(sock, (struct sockaddr *)&zclient_addr, zclient_addr_len); | |
218 | if (ret < 0) { | |
219 | if (zclient_debug) | |
220 | zlog_warn("%s connect failure: %d(%s)", | |
221 | __PRETTY_FUNCTION__, errno, | |
222 | safe_strerror(errno)); | |
223 | close(sock); | |
224 | return -1; | |
225 | } | |
226 | ||
227 | zclient->sock = sock; | |
228 | return sock; | |
229 | } | |
230 | ||
231 | static int zclient_failed(struct zclient *zclient) | |
232 | { | |
233 | zclient->fail++; | |
234 | zclient_stop(zclient); | |
235 | zclient_event(ZCLIENT_CONNECT, zclient); | |
236 | return -1; | |
237 | } | |
238 | ||
239 | static int zclient_flush_data(struct thread *thread) | |
240 | { | |
241 | struct zclient *zclient = THREAD_ARG(thread); | |
242 | ||
243 | zclient->t_write = NULL; | |
244 | if (zclient->sock < 0) | |
245 | return -1; | |
246 | switch (buffer_flush_available(zclient->wb, zclient->sock)) { | |
247 | case BUFFER_ERROR: | |
248 | zlog_warn( | |
249 | "%s: buffer_flush_available failed on zclient fd %d, closing", | |
250 | __func__, zclient->sock); | |
251 | return zclient_failed(zclient); | |
252 | break; | |
253 | case BUFFER_PENDING: | |
254 | zclient->t_write = NULL; | |
255 | thread_add_write(zclient->master, zclient_flush_data, zclient, | |
256 | zclient->sock, &zclient->t_write); | |
257 | break; | |
258 | case BUFFER_EMPTY: | |
259 | break; | |
260 | } | |
261 | return 0; | |
262 | } | |
263 | ||
264 | int zclient_send_message(struct zclient *zclient) | |
265 | { | |
266 | if (zclient->sock < 0) | |
267 | return -1; | |
268 | switch (buffer_write(zclient->wb, zclient->sock, | |
269 | STREAM_DATA(zclient->obuf), | |
270 | stream_get_endp(zclient->obuf))) { | |
271 | case BUFFER_ERROR: | |
272 | zlog_warn("%s: buffer_write failed to zclient fd %d, closing", | |
273 | __func__, zclient->sock); | |
274 | return zclient_failed(zclient); | |
275 | break; | |
276 | case BUFFER_EMPTY: | |
277 | THREAD_OFF(zclient->t_write); | |
278 | break; | |
279 | case BUFFER_PENDING: | |
280 | thread_add_write(zclient->master, zclient_flush_data, zclient, | |
281 | zclient->sock, &zclient->t_write); | |
282 | break; | |
283 | } | |
284 | return 0; | |
285 | } | |
286 | ||
287 | void zclient_create_header(struct stream *s, uint16_t command, vrf_id_t vrf_id) | |
288 | { | |
289 | /* length placeholder, caller can update */ | |
290 | stream_putw(s, ZEBRA_HEADER_SIZE); | |
291 | stream_putc(s, ZEBRA_HEADER_MARKER); | |
292 | stream_putc(s, ZSERV_VERSION); | |
293 | stream_putl(s, vrf_id); | |
294 | stream_putw(s, command); | |
295 | } | |
296 | ||
297 | int zclient_read_header(struct stream *s, int sock, u_int16_t *size, | |
298 | u_char *marker, u_char *version, vrf_id_t *vrf_id, | |
299 | u_int16_t *cmd) | |
300 | { | |
301 | if (stream_read(s, sock, ZEBRA_HEADER_SIZE) != ZEBRA_HEADER_SIZE) | |
302 | return -1; | |
303 | ||
304 | STREAM_GETW(s, *size); | |
305 | *size -= ZEBRA_HEADER_SIZE; | |
306 | STREAM_GETC(s, *marker); | |
307 | STREAM_GETC(s, *version); | |
308 | STREAM_GETL(s, *vrf_id); | |
309 | STREAM_GETW(s, *cmd); | |
310 | ||
311 | if (*version != ZSERV_VERSION || *marker != ZEBRA_HEADER_MARKER) { | |
312 | zlog_err( | |
313 | "%s: socket %d version mismatch, marker %d, version %d", | |
314 | __func__, sock, *marker, *version); | |
315 | return -1; | |
316 | } | |
317 | ||
318 | if (*size && stream_read(s, sock, *size) != *size) | |
319 | return -1; | |
320 | ||
321 | stream_failure: | |
322 | return 0; | |
323 | } | |
324 | ||
325 | /* Send simple Zebra message. */ | |
326 | static int zebra_message_send(struct zclient *zclient, int command, | |
327 | vrf_id_t vrf_id) | |
328 | { | |
329 | struct stream *s; | |
330 | ||
331 | /* Get zclient output buffer. */ | |
332 | s = zclient->obuf; | |
333 | stream_reset(s); | |
334 | ||
335 | /* Send very simple command only Zebra message. */ | |
336 | zclient_create_header(s, command, vrf_id); | |
337 | ||
338 | return zclient_send_message(zclient); | |
339 | } | |
340 | ||
341 | static int zebra_hello_send(struct zclient *zclient) | |
342 | { | |
343 | struct stream *s; | |
344 | ||
345 | if (zclient->redist_default) { | |
346 | s = zclient->obuf; | |
347 | stream_reset(s); | |
348 | ||
349 | /* The VRF ID in the HELLO message is always 0. */ | |
350 | zclient_create_header(s, ZEBRA_HELLO, VRF_DEFAULT); | |
351 | stream_putc(s, zclient->redist_default); | |
352 | stream_putw(s, zclient->instance); | |
353 | if (zclient->receive_notify) | |
354 | stream_putc(s, 1); | |
355 | else | |
356 | stream_putc(s, 0); | |
357 | ||
358 | stream_putw_at(s, 0, stream_get_endp(s)); | |
359 | return zclient_send_message(zclient); | |
360 | } | |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
365 | void zclient_send_vrf_label(struct zclient *zclient, vrf_id_t vrf_id, afi_t afi, | |
366 | mpls_label_t label, enum lsp_types_t ltype) | |
367 | { | |
368 | struct stream *s; | |
369 | ||
370 | s = zclient->obuf; | |
371 | stream_reset(s); | |
372 | ||
373 | zclient_create_header(s, ZEBRA_VRF_LABEL, vrf_id); | |
374 | stream_putl(s, label); | |
375 | stream_putc(s, afi); | |
376 | stream_putc(s, ltype); | |
377 | stream_putw_at(s, 0, stream_get_endp(s)); | |
378 | zclient_send_message(zclient); | |
379 | } | |
380 | ||
381 | /* Send register requests to zebra daemon for the information in a VRF. */ | |
382 | void zclient_send_reg_requests(struct zclient *zclient, vrf_id_t vrf_id) | |
383 | { | |
384 | int i; | |
385 | afi_t afi; | |
386 | ||
387 | /* If not connected to the zebra yet. */ | |
388 | if (zclient->sock < 0) | |
389 | return; | |
390 | ||
391 | if (zclient_debug) | |
392 | zlog_debug("%s: send register messages for VRF %u", __func__, | |
393 | vrf_id); | |
394 | ||
395 | /* We need router-id information. */ | |
396 | zebra_message_send(zclient, ZEBRA_ROUTER_ID_ADD, vrf_id); | |
397 | ||
398 | /* We need interface information. */ | |
399 | zebra_message_send(zclient, ZEBRA_INTERFACE_ADD, vrf_id); | |
400 | ||
401 | /* Set unwanted redistribute route. */ | |
402 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
403 | vrf_bitmap_set(zclient->redist[afi][zclient->redist_default], | |
404 | vrf_id); | |
405 | ||
406 | /* Flush all redistribute request. */ | |
407 | if (vrf_id == VRF_DEFAULT) { | |
408 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
409 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) { | |
410 | if (!zclient->mi_redist[afi][i].enabled) | |
411 | continue; | |
412 | ||
413 | struct listnode *node; | |
414 | u_short *id; | |
415 | ||
416 | for (ALL_LIST_ELEMENTS_RO( | |
417 | zclient->mi_redist[afi][i] | |
418 | .instances, | |
419 | node, id)) | |
420 | if (!(i == zclient->redist_default | |
421 | && *id == zclient->instance)) | |
422 | zebra_redistribute_send( | |
423 | ZEBRA_REDISTRIBUTE_ADD, | |
424 | zclient, afi, i, *id, | |
425 | VRF_DEFAULT); | |
426 | } | |
427 | } | |
428 | } | |
429 | ||
430 | /* Flush all redistribute request. */ | |
431 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
432 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
433 | if (i != zclient->redist_default | |
434 | && vrf_bitmap_check(zclient->redist[afi][i], | |
435 | vrf_id)) | |
436 | zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, | |
437 | zclient, afi, i, 0, | |
438 | vrf_id); | |
439 | ||
440 | /* If default information is needed. */ | |
441 | if (vrf_bitmap_check(zclient->default_information, VRF_DEFAULT)) | |
442 | zebra_message_send(zclient, ZEBRA_REDISTRIBUTE_DEFAULT_ADD, | |
443 | vrf_id); | |
444 | } | |
445 | ||
446 | /* Send unregister requests to zebra daemon for the information in a VRF. */ | |
447 | void zclient_send_dereg_requests(struct zclient *zclient, vrf_id_t vrf_id) | |
448 | { | |
449 | int i; | |
450 | afi_t afi; | |
451 | ||
452 | /* If not connected to the zebra yet. */ | |
453 | if (zclient->sock < 0) | |
454 | return; | |
455 | ||
456 | if (zclient_debug) | |
457 | zlog_debug("%s: send deregister messages for VRF %u", __func__, | |
458 | vrf_id); | |
459 | ||
460 | /* We need router-id information. */ | |
461 | zebra_message_send(zclient, ZEBRA_ROUTER_ID_DELETE, vrf_id); | |
462 | ||
463 | /* We need interface information. */ | |
464 | zebra_message_send(zclient, ZEBRA_INTERFACE_DELETE, vrf_id); | |
465 | ||
466 | /* Set unwanted redistribute route. */ | |
467 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
468 | vrf_bitmap_unset(zclient->redist[afi][zclient->redist_default], | |
469 | vrf_id); | |
470 | ||
471 | /* Flush all redistribute request. */ | |
472 | if (vrf_id == VRF_DEFAULT) { | |
473 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
474 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) { | |
475 | if (!zclient->mi_redist[afi][i].enabled) | |
476 | continue; | |
477 | ||
478 | struct listnode *node; | |
479 | u_short *id; | |
480 | ||
481 | for (ALL_LIST_ELEMENTS_RO( | |
482 | zclient->mi_redist[afi][i] | |
483 | .instances, | |
484 | node, id)) | |
485 | if (!(i == zclient->redist_default | |
486 | && *id == zclient->instance)) | |
487 | zebra_redistribute_send( | |
488 | ZEBRA_REDISTRIBUTE_DELETE, | |
489 | zclient, afi, i, *id, | |
490 | VRF_DEFAULT); | |
491 | } | |
492 | } | |
493 | } | |
494 | ||
495 | /* Flush all redistribute request. */ | |
496 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
497 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
498 | if (i != zclient->redist_default | |
499 | && vrf_bitmap_check(zclient->redist[afi][i], | |
500 | vrf_id)) | |
501 | zebra_redistribute_send( | |
502 | ZEBRA_REDISTRIBUTE_DELETE, zclient, afi, | |
503 | i, 0, vrf_id); | |
504 | ||
505 | /* If default information is needed. */ | |
506 | if (vrf_bitmap_check(zclient->default_information, VRF_DEFAULT)) | |
507 | zebra_message_send(zclient, ZEBRA_REDISTRIBUTE_DEFAULT_DELETE, | |
508 | vrf_id); | |
509 | } | |
510 | ||
511 | /* Send request to zebra daemon to start or stop RA. */ | |
512 | void zclient_send_interface_radv_req(struct zclient *zclient, vrf_id_t vrf_id, | |
513 | struct interface *ifp, int enable, | |
514 | int ra_interval) | |
515 | { | |
516 | struct stream *s; | |
517 | ||
518 | /* If not connected to the zebra yet. */ | |
519 | if (zclient->sock < 0) | |
520 | return; | |
521 | ||
522 | /* Form and send message. */ | |
523 | s = zclient->obuf; | |
524 | stream_reset(s); | |
525 | ||
526 | if (enable) | |
527 | zclient_create_header(s, ZEBRA_INTERFACE_ENABLE_RADV, vrf_id); | |
528 | else | |
529 | zclient_create_header(s, ZEBRA_INTERFACE_DISABLE_RADV, vrf_id); | |
530 | ||
531 | stream_putl(s, ifp->ifindex); | |
532 | stream_putl(s, ra_interval); | |
533 | ||
534 | stream_putw_at(s, 0, stream_get_endp(s)); | |
535 | ||
536 | zclient_send_message(zclient); | |
537 | } | |
538 | ||
539 | /* Make connection to zebra daemon. */ | |
540 | int zclient_start(struct zclient *zclient) | |
541 | { | |
542 | if (zclient_debug) | |
543 | zlog_info("zclient_start is called"); | |
544 | ||
545 | /* If already connected to the zebra. */ | |
546 | if (zclient->sock >= 0) | |
547 | return 0; | |
548 | ||
549 | /* Check connect thread. */ | |
550 | if (zclient->t_connect) | |
551 | return 0; | |
552 | ||
553 | if (zclient_socket_connect(zclient) < 0) { | |
554 | if (zclient_debug) | |
555 | zlog_debug("zclient connection fail"); | |
556 | zclient->fail++; | |
557 | zclient_event(ZCLIENT_CONNECT, zclient); | |
558 | return -1; | |
559 | } | |
560 | ||
561 | if (set_nonblocking(zclient->sock) < 0) | |
562 | zlog_warn("%s: set_nonblocking(%d) failed", __func__, | |
563 | zclient->sock); | |
564 | ||
565 | /* Clear fail count. */ | |
566 | zclient->fail = 0; | |
567 | if (zclient_debug) | |
568 | zlog_debug("zclient connect success with socket [%d]", | |
569 | zclient->sock); | |
570 | ||
571 | /* Create read thread. */ | |
572 | zclient_event(ZCLIENT_READ, zclient); | |
573 | ||
574 | zebra_hello_send(zclient); | |
575 | ||
576 | /* Inform the successful connection. */ | |
577 | if (zclient->zebra_connected) | |
578 | (*zclient->zebra_connected)(zclient); | |
579 | ||
580 | return 0; | |
581 | } | |
582 | ||
583 | /* Initialize zebra client. Argument redist_default is unwanted | |
584 | redistribute route type. */ | |
585 | void zclient_init(struct zclient *zclient, int redist_default, u_short instance, | |
586 | struct zebra_privs_t *privs) | |
587 | { | |
588 | int afi, i; | |
589 | ||
590 | /* Set -1 to the default socket value. */ | |
591 | zclient->sock = -1; | |
592 | zclient->privs = privs; | |
593 | ||
594 | /* Clear redistribution flags. */ | |
595 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
596 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
597 | zclient->redist[afi][i] = vrf_bitmap_init(); | |
598 | ||
599 | /* Set unwanted redistribute route. bgpd does not need BGP route | |
600 | redistribution. */ | |
601 | zclient->redist_default = redist_default; | |
602 | zclient->instance = instance; | |
603 | /* Pending: make afi(s) an arg. */ | |
604 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
605 | redist_add_instance(&zclient->mi_redist[afi][redist_default], | |
606 | instance); | |
607 | ||
608 | /* Set default-information redistribute to zero. */ | |
609 | zclient->default_information = vrf_bitmap_init(); | |
610 | ||
611 | if (zclient_debug) | |
612 | zlog_debug("zclient_start is called"); | |
613 | ||
614 | zclient_event(ZCLIENT_SCHEDULE, zclient); | |
615 | } | |
616 | ||
617 | /* This function is a wrapper function for calling zclient_start from | |
618 | timer or event thread. */ | |
619 | static int zclient_connect(struct thread *t) | |
620 | { | |
621 | struct zclient *zclient; | |
622 | ||
623 | zclient = THREAD_ARG(t); | |
624 | zclient->t_connect = NULL; | |
625 | ||
626 | if (zclient_debug) | |
627 | zlog_debug("zclient_connect is called"); | |
628 | ||
629 | return zclient_start(zclient); | |
630 | } | |
631 | ||
632 | int zclient_send_rnh(struct zclient *zclient, int command, struct prefix *p, | |
633 | bool exact_match, vrf_id_t vrf_id) | |
634 | { | |
635 | struct stream *s; | |
636 | ||
637 | s = zclient->obuf; | |
638 | stream_reset(s); | |
639 | zclient_create_header(s, command, vrf_id); | |
640 | stream_putc(s, (exact_match) ? 1 : 0); | |
641 | ||
642 | stream_putw(s, PREFIX_FAMILY(p)); | |
643 | stream_putc(s, p->prefixlen); | |
644 | switch (PREFIX_FAMILY(p)) { | |
645 | case AF_INET: | |
646 | stream_put_in_addr(s, &p->u.prefix4); | |
647 | break; | |
648 | case AF_INET6: | |
649 | stream_put(s, &(p->u.prefix6), 16); | |
650 | break; | |
651 | default: | |
652 | break; | |
653 | } | |
654 | stream_putw_at(s, 0, stream_get_endp(s)); | |
655 | ||
656 | return zclient_send_message(zclient); | |
657 | } | |
658 | ||
659 | /* | |
660 | * "xdr_encode"-like interface that allows daemon (client) to send | |
661 | * a message to zebra server for a route that needs to be | |
662 | * added/deleted to the kernel. Info about the route is specified | |
663 | * by the caller in a struct zapi_ipv4. zapi_ipv4_read() then writes | |
664 | * the info down the zclient socket using the stream_* functions. | |
665 | * | |
666 | * The corresponding read ("xdr_decode") function on the server | |
667 | * side is zread_ipv4_add()/zread_ipv4_delete(). | |
668 | * | |
669 | * 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 | |
670 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
671 | * | Length (2) | Command | Route Type | | |
672 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
673 | * | ZEBRA Flags | Message Flags | Prefix length | | |
674 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
675 | * | Destination IPv4 Prefix for route | | |
676 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
677 | * | Nexthop count | | |
678 | * +-+-+-+-+-+-+-+-+ | |
679 | * | |
680 | * | |
681 | * A number of IPv4 nexthop(s) or nexthop interface index(es) are then | |
682 | * described, as per the Nexthop count. Each nexthop described as: | |
683 | * | |
684 | * +-+-+-+-+-+-+-+-+ | |
685 | * | Nexthop Type | Set to one of ZEBRA_NEXTHOP_* | |
686 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
687 | * | IPv4 Nexthop address or Interface Index number | | |
688 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
689 | * | |
690 | * Alternatively, if the route is a blackhole route, then Nexthop count | |
691 | * is set to 1 and a nexthop of type NEXTHOP_TYPE_BLACKHOLE is the sole | |
692 | * nexthop. | |
693 | * | |
694 | * The original struct zapi_ipv4, zapi_ipv4_route() and zread_ipv4_*() | |
695 | * infrastructure was built around the traditional (32-bit "gate OR | |
696 | * ifindex") nexthop data unit. A special encoding can be used to feed | |
697 | * onlink (64-bit "gate AND ifindex") nexthops into zapi_ipv4_route() | |
698 | * using the same zapi_ipv4 structure. This is done by setting zapi_ipv4 | |
699 | * fields as follows: | |
700 | * - .message |= ZAPI_MESSAGE_NEXTHOP | ZAPI_MESSAGE_ONLINK | |
701 | * - .nexthop_num == .ifindex_num | |
702 | * - .nexthop and .ifindex are filled with gate and ifindex parts of | |
703 | * each compound nexthop, both in the same order | |
704 | * | |
705 | * zapi_ipv4_route() will produce two nexthop data units for each such | |
706 | * interleaved 64-bit nexthop. On the zserv side of the socket it will be | |
707 | * mapped to a singlle NEXTHOP_TYPE_IPV4_IFINDEX_OL RIB nexthop structure. | |
708 | * | |
709 | * If ZAPI_MESSAGE_DISTANCE is set, the distance value is written as a 1 | |
710 | * byte value. | |
711 | * | |
712 | * If ZAPI_MESSAGE_METRIC is set, the metric value is written as an 8 | |
713 | * byte value. | |
714 | * | |
715 | * If ZAPI_MESSAGE_TAG is set, the tag value is written as a 4 byte value | |
716 | * | |
717 | * If ZAPI_MESSAGE_MTU is set, the mtu value is written as a 4 byte value | |
718 | * | |
719 | * XXX: No attention paid to alignment. | |
720 | */ | |
721 | int zapi_ipv4_route(u_char cmd, struct zclient *zclient, struct prefix_ipv4 *p, | |
722 | struct zapi_ipv4 *api) | |
723 | { | |
724 | int i; | |
725 | int psize; | |
726 | struct stream *s; | |
727 | ||
728 | /* Reset stream. */ | |
729 | s = zclient->obuf; | |
730 | stream_reset(s); | |
731 | ||
732 | /* Some checks for labeled-unicast. The current expectation is that each | |
733 | * nexthop is accompanied by a label in the case of labeled-unicast. | |
734 | */ | |
735 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL) | |
736 | && CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) { | |
737 | /* We expect prefixes installed with labels and the number to | |
738 | * match | |
739 | * the number of nexthops. | |
740 | */ | |
741 | assert(api->label_num == api->nexthop_num); | |
742 | } | |
743 | ||
744 | zclient_create_header(s, cmd, api->vrf_id); | |
745 | ||
746 | /* Put type and nexthop. */ | |
747 | stream_putc(s, api->type); | |
748 | stream_putw(s, api->instance); | |
749 | stream_putl(s, api->flags); | |
750 | stream_putc(s, api->message); | |
751 | stream_putw(s, api->safi); | |
752 | ||
753 | /* Put prefix information. */ | |
754 | psize = PSIZE(p->prefixlen); | |
755 | stream_putc(s, p->prefixlen); | |
756 | stream_write(s, (u_char *)&p->prefix, psize); | |
757 | ||
758 | /* Nexthop, ifindex, distance and metric information. */ | |
759 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) { | |
760 | stream_putc(s, api->nexthop_num + api->ifindex_num); | |
761 | ||
762 | for (i = 0; i < api->nexthop_num; i++) { | |
763 | stream_putc(s, NEXTHOP_TYPE_IPV4); | |
764 | stream_put_in_addr(s, api->nexthop[i]); | |
765 | /* For labeled-unicast, each nexthop is followed by | |
766 | * label. */ | |
767 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL)) | |
768 | stream_putl(s, api->label[i]); | |
769 | } | |
770 | for (i = 0; i < api->ifindex_num; i++) { | |
771 | stream_putc(s, NEXTHOP_TYPE_IFINDEX); | |
772 | stream_putl(s, api->ifindex[i]); | |
773 | } | |
774 | } | |
775 | ||
776 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_DISTANCE)) | |
777 | stream_putc(s, api->distance); | |
778 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_METRIC)) | |
779 | stream_putl(s, api->metric); | |
780 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_TAG)) | |
781 | stream_putl(s, api->tag); | |
782 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_MTU)) | |
783 | stream_putl(s, api->mtu); | |
784 | ||
785 | /* Put length at the first point of the stream. */ | |
786 | stream_putw_at(s, 0, stream_get_endp(s)); | |
787 | ||
788 | return zclient_send_message(zclient); | |
789 | } | |
790 | ||
791 | int zapi_ipv4_route_ipv6_nexthop(u_char cmd, struct zclient *zclient, | |
792 | struct prefix_ipv4 *p, struct zapi_ipv6 *api) | |
793 | { | |
794 | int i; | |
795 | int psize; | |
796 | struct stream *s; | |
797 | ||
798 | /* Reset stream. */ | |
799 | s = zclient->obuf; | |
800 | stream_reset(s); | |
801 | ||
802 | /* Some checks for labeled-unicast. The current expectation is that each | |
803 | * nexthop is accompanied by a label in the case of labeled-unicast. | |
804 | */ | |
805 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL) | |
806 | && CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) { | |
807 | /* We expect prefixes installed with labels and the number to | |
808 | * match | |
809 | * the number of nexthops. | |
810 | */ | |
811 | assert(api->label_num == api->nexthop_num); | |
812 | } | |
813 | ||
814 | zclient_create_header(s, cmd, api->vrf_id); | |
815 | ||
816 | /* Put type and nexthop. */ | |
817 | stream_putc(s, api->type); | |
818 | stream_putw(s, api->instance); | |
819 | stream_putl(s, api->flags); | |
820 | stream_putc(s, api->message); | |
821 | stream_putw(s, api->safi); | |
822 | ||
823 | /* Put prefix information. */ | |
824 | psize = PSIZE(p->prefixlen); | |
825 | stream_putc(s, p->prefixlen); | |
826 | stream_write(s, (u_char *)&p->prefix, psize); | |
827 | ||
828 | /* Nexthop, ifindex, distance and metric information. */ | |
829 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) { | |
830 | stream_putc(s, api->nexthop_num + api->ifindex_num); | |
831 | ||
832 | for (i = 0; i < api->nexthop_num; i++) { | |
833 | stream_putc(s, NEXTHOP_TYPE_IPV6); | |
834 | stream_write(s, (u_char *)api->nexthop[i], 16); | |
835 | /* For labeled-unicast, each nexthop is followed by | |
836 | * label. */ | |
837 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL)) | |
838 | stream_putl(s, api->label[i]); | |
839 | } | |
840 | for (i = 0; i < api->ifindex_num; i++) { | |
841 | stream_putc(s, NEXTHOP_TYPE_IFINDEX); | |
842 | stream_putl(s, api->ifindex[i]); | |
843 | } | |
844 | } | |
845 | ||
846 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_DISTANCE)) | |
847 | stream_putc(s, api->distance); | |
848 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_METRIC)) | |
849 | stream_putl(s, api->metric); | |
850 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_TAG)) | |
851 | stream_putl(s, api->tag); | |
852 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_MTU)) | |
853 | stream_putl(s, api->mtu); | |
854 | ||
855 | /* Put length at the first point of the stream. */ | |
856 | stream_putw_at(s, 0, stream_get_endp(s)); | |
857 | ||
858 | return zclient_send_message(zclient); | |
859 | } | |
860 | ||
861 | int zapi_ipv6_route(u_char cmd, struct zclient *zclient, struct prefix_ipv6 *p, | |
862 | struct prefix_ipv6 *src_p, struct zapi_ipv6 *api) | |
863 | { | |
864 | int i; | |
865 | int psize; | |
866 | struct stream *s; | |
867 | ||
868 | /* either we have !SRCPFX && src_p == NULL, or SRCPFX && src_p != NULL | |
869 | */ | |
870 | assert(!(api->message & ZAPI_MESSAGE_SRCPFX) == !src_p); | |
871 | ||
872 | /* Reset stream. */ | |
873 | s = zclient->obuf; | |
874 | stream_reset(s); | |
875 | ||
876 | /* Some checks for labeled-unicast. The current expectation is that each | |
877 | * nexthop is accompanied by a label in the case of labeled-unicast. | |
878 | */ | |
879 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL) | |
880 | && CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) { | |
881 | /* We expect prefixes installed with labels and the number to | |
882 | * match | |
883 | * the number of nexthops. | |
884 | */ | |
885 | assert(api->label_num == api->nexthop_num); | |
886 | } | |
887 | ||
888 | zclient_create_header(s, cmd, api->vrf_id); | |
889 | ||
890 | /* Put type and nexthop. */ | |
891 | stream_putc(s, api->type); | |
892 | stream_putw(s, api->instance); | |
893 | stream_putl(s, api->flags); | |
894 | stream_putc(s, api->message); | |
895 | stream_putw(s, api->safi); | |
896 | ||
897 | /* Put prefix information. */ | |
898 | psize = PSIZE(p->prefixlen); | |
899 | stream_putc(s, p->prefixlen); | |
900 | stream_write(s, (u_char *)&p->prefix, psize); | |
901 | ||
902 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_SRCPFX)) { | |
903 | psize = PSIZE(src_p->prefixlen); | |
904 | stream_putc(s, src_p->prefixlen); | |
905 | stream_write(s, (u_char *)&src_p->prefix, psize); | |
906 | } | |
907 | ||
908 | /* Nexthop, ifindex, distance and metric information. */ | |
909 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) { | |
910 | stream_putc(s, api->nexthop_num + api->ifindex_num); | |
911 | ||
912 | for (i = 0; i < api->nexthop_num; i++) { | |
913 | stream_putc(s, NEXTHOP_TYPE_IPV6); | |
914 | stream_write(s, (u_char *)api->nexthop[i], 16); | |
915 | /* For labeled-unicast, each nexthop is followed by | |
916 | * label. */ | |
917 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL)) | |
918 | stream_putl(s, api->label[i]); | |
919 | } | |
920 | for (i = 0; i < api->ifindex_num; i++) { | |
921 | stream_putc(s, NEXTHOP_TYPE_IFINDEX); | |
922 | stream_putl(s, api->ifindex[i]); | |
923 | } | |
924 | } | |
925 | ||
926 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_DISTANCE)) | |
927 | stream_putc(s, api->distance); | |
928 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_METRIC)) | |
929 | stream_putl(s, api->metric); | |
930 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_TAG)) | |
931 | stream_putl(s, api->tag); | |
932 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_MTU)) | |
933 | stream_putl(s, api->mtu); | |
934 | ||
935 | /* Put length at the first point of the stream. */ | |
936 | stream_putw_at(s, 0, stream_get_endp(s)); | |
937 | ||
938 | return zclient_send_message(zclient); | |
939 | } | |
940 | ||
941 | int zclient_route_send(u_char cmd, struct zclient *zclient, | |
942 | struct zapi_route *api) | |
943 | { | |
944 | if (zapi_route_encode(cmd, zclient->obuf, api) < 0) | |
945 | return -1; | |
946 | return zclient_send_message(zclient); | |
947 | } | |
948 | ||
949 | int zapi_route_encode(u_char cmd, struct stream *s, struct zapi_route *api) | |
950 | { | |
951 | struct zapi_nexthop *api_nh; | |
952 | int i; | |
953 | int psize; | |
954 | ||
955 | stream_reset(s); | |
956 | zclient_create_header(s, cmd, api->vrf_id); | |
957 | ||
958 | stream_putc(s, api->type); | |
959 | stream_putw(s, api->instance); | |
960 | stream_putl(s, api->flags); | |
961 | stream_putc(s, api->message); | |
962 | stream_putc(s, api->safi); | |
963 | if (CHECK_FLAG(api->flags, ZEBRA_FLAG_EVPN_ROUTE)) | |
964 | stream_put(s, &(api->rmac), sizeof(struct ethaddr)); | |
965 | ||
966 | /* Put prefix information. */ | |
967 | stream_putc(s, api->prefix.family); | |
968 | psize = PSIZE(api->prefix.prefixlen); | |
969 | stream_putc(s, api->prefix.prefixlen); | |
970 | stream_write(s, (u_char *)&api->prefix.u.prefix, psize); | |
971 | ||
972 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_SRCPFX)) { | |
973 | psize = PSIZE(api->src_prefix.prefixlen); | |
974 | stream_putc(s, api->src_prefix.prefixlen); | |
975 | stream_write(s, (u_char *)&api->src_prefix.prefix, psize); | |
976 | } | |
977 | ||
978 | /* Nexthops. */ | |
979 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) { | |
980 | /* limit the number of nexthops if necessary */ | |
981 | if (api->nexthop_num > MULTIPATH_NUM) { | |
982 | char buf[PREFIX2STR_BUFFER]; | |
983 | ||
984 | prefix2str(&api->prefix, buf, sizeof(buf)); | |
985 | zlog_warn( | |
986 | "%s: prefix %s: can't encode %u nexthops " | |
987 | "(maximum is %u)", | |
988 | __func__, buf, api->nexthop_num, MULTIPATH_NUM); | |
989 | return -1; | |
990 | } | |
991 | ||
992 | stream_putw(s, api->nexthop_num); | |
993 | ||
994 | for (i = 0; i < api->nexthop_num; i++) { | |
995 | api_nh = &api->nexthops[i]; | |
996 | ||
997 | stream_putl(s, api_nh->vrf_id); | |
998 | stream_putc(s, api_nh->type); | |
999 | switch (api_nh->type) { | |
1000 | case NEXTHOP_TYPE_BLACKHOLE: | |
1001 | stream_putc(s, api_nh->bh_type); | |
1002 | break; | |
1003 | case NEXTHOP_TYPE_IPV4: | |
1004 | stream_put_in_addr(s, &api_nh->gate.ipv4); | |
1005 | break; | |
1006 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1007 | stream_put_in_addr(s, &api_nh->gate.ipv4); | |
1008 | stream_putl(s, api_nh->ifindex); | |
1009 | break; | |
1010 | case NEXTHOP_TYPE_IFINDEX: | |
1011 | stream_putl(s, api_nh->ifindex); | |
1012 | break; | |
1013 | case NEXTHOP_TYPE_IPV6: | |
1014 | stream_write(s, (u_char *)&api_nh->gate.ipv6, | |
1015 | 16); | |
1016 | break; | |
1017 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1018 | stream_write(s, (u_char *)&api_nh->gate.ipv6, | |
1019 | 16); | |
1020 | stream_putl(s, api_nh->ifindex); | |
1021 | break; | |
1022 | default: | |
1023 | zlog_warn( | |
1024 | "%s: Specified Nexthop type %d does not exist", | |
1025 | __PRETTY_FUNCTION__, api_nh->type); | |
1026 | return -1; | |
1027 | } | |
1028 | ||
1029 | /* MPLS labels for BGP-LU or Segment Routing */ | |
1030 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL)) { | |
1031 | if (api_nh->label_num > MPLS_MAX_LABELS) { | |
1032 | char buf[PREFIX2STR_BUFFER]; | |
1033 | prefix2str(&api->prefix, buf, | |
1034 | sizeof(buf)); | |
1035 | zlog_err( | |
1036 | "%s: prefix %s: can't encode " | |
1037 | "%u labels (maximum is %u)", | |
1038 | __func__, buf, | |
1039 | api_nh->label_num, | |
1040 | MPLS_MAX_LABELS); | |
1041 | return -1; | |
1042 | } | |
1043 | ||
1044 | stream_putc(s, api_nh->label_num); | |
1045 | stream_put(s, &api_nh->labels[0], | |
1046 | api_nh->label_num | |
1047 | * sizeof(mpls_label_t)); | |
1048 | } | |
1049 | } | |
1050 | } | |
1051 | ||
1052 | /* Attributes. */ | |
1053 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_DISTANCE)) | |
1054 | stream_putc(s, api->distance); | |
1055 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_METRIC)) | |
1056 | stream_putl(s, api->metric); | |
1057 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_TAG)) | |
1058 | stream_putl(s, api->tag); | |
1059 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_MTU)) | |
1060 | stream_putl(s, api->mtu); | |
1061 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_TABLEID)) | |
1062 | stream_putl(s, api->tableid); | |
1063 | ||
1064 | /* Put length at the first point of the stream. */ | |
1065 | stream_putw_at(s, 0, stream_get_endp(s)); | |
1066 | ||
1067 | return 0; | |
1068 | } | |
1069 | ||
1070 | int zapi_route_decode(struct stream *s, struct zapi_route *api) | |
1071 | { | |
1072 | struct zapi_nexthop *api_nh; | |
1073 | int i; | |
1074 | ||
1075 | memset(api, 0, sizeof(*api)); | |
1076 | ||
1077 | /* Type, flags, message. */ | |
1078 | STREAM_GETC(s, api->type); | |
1079 | if (api->type > ZEBRA_ROUTE_MAX) { | |
1080 | zlog_warn("%s: Specified route type: %d is not a legal value\n", | |
1081 | __PRETTY_FUNCTION__, api->type); | |
1082 | return -1; | |
1083 | } | |
1084 | ||
1085 | STREAM_GETW(s, api->instance); | |
1086 | STREAM_GETL(s, api->flags); | |
1087 | STREAM_GETC(s, api->message); | |
1088 | STREAM_GETC(s, api->safi); | |
1089 | if (CHECK_FLAG(api->flags, ZEBRA_FLAG_EVPN_ROUTE)) | |
1090 | STREAM_GET(&(api->rmac), s, sizeof(struct ethaddr)); | |
1091 | ||
1092 | /* Prefix. */ | |
1093 | STREAM_GETC(s, api->prefix.family); | |
1094 | STREAM_GETC(s, api->prefix.prefixlen); | |
1095 | switch (api->prefix.family) { | |
1096 | case AF_INET: | |
1097 | if (api->prefix.prefixlen > IPV4_MAX_PREFIXLEN) { | |
1098 | zlog_warn( | |
1099 | "%s: V4 prefixlen is %d which should not be more than 32", | |
1100 | __PRETTY_FUNCTION__, api->prefix.prefixlen); | |
1101 | return -1; | |
1102 | } | |
1103 | break; | |
1104 | case AF_INET6: | |
1105 | if (api->prefix.prefixlen > IPV6_MAX_PREFIXLEN) { | |
1106 | zlog_warn( | |
1107 | "%s: v6 prefixlen is %d which should not be more than 128", | |
1108 | __PRETTY_FUNCTION__, api->prefix.prefixlen); | |
1109 | return -1; | |
1110 | } | |
1111 | break; | |
1112 | default: | |
1113 | zlog_warn("%s: Specified family %d is not v4 or v6", | |
1114 | __PRETTY_FUNCTION__, api->prefix.family); | |
1115 | return -1; | |
1116 | } | |
1117 | STREAM_GET(&api->prefix.u.prefix, s, PSIZE(api->prefix.prefixlen)); | |
1118 | ||
1119 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_SRCPFX)) { | |
1120 | api->src_prefix.family = AF_INET6; | |
1121 | STREAM_GETC(s, api->src_prefix.prefixlen); | |
1122 | if (api->src_prefix.prefixlen > IPV6_MAX_PREFIXLEN) { | |
1123 | zlog_warn( | |
1124 | "%s: SRC Prefix prefixlen received: %d is too large", | |
1125 | __PRETTY_FUNCTION__, api->src_prefix.prefixlen); | |
1126 | return -1; | |
1127 | } | |
1128 | STREAM_GET(&api->src_prefix.prefix, s, | |
1129 | PSIZE(api->src_prefix.prefixlen)); | |
1130 | ||
1131 | if (api->prefix.family != AF_INET6 | |
1132 | || api->src_prefix.prefixlen == 0) { | |
1133 | zlog_warn( | |
1134 | "%s: SRC prefix specified in some manner that makes no sense", | |
1135 | __PRETTY_FUNCTION__); | |
1136 | return -1; | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | /* Nexthops. */ | |
1141 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) { | |
1142 | STREAM_GETW(s, api->nexthop_num); | |
1143 | if (api->nexthop_num > MULTIPATH_NUM) { | |
1144 | zlog_warn("%s: invalid number of nexthops (%u)", | |
1145 | __func__, api->nexthop_num); | |
1146 | return -1; | |
1147 | } | |
1148 | ||
1149 | for (i = 0; i < api->nexthop_num; i++) { | |
1150 | api_nh = &api->nexthops[i]; | |
1151 | ||
1152 | STREAM_GETL(s, api_nh->vrf_id); | |
1153 | STREAM_GETC(s, api_nh->type); | |
1154 | switch (api_nh->type) { | |
1155 | case NEXTHOP_TYPE_BLACKHOLE: | |
1156 | STREAM_GETC(s, api_nh->bh_type); | |
1157 | break; | |
1158 | case NEXTHOP_TYPE_IPV4: | |
1159 | STREAM_GET(&api_nh->gate.ipv4.s_addr, s, | |
1160 | IPV4_MAX_BYTELEN); | |
1161 | break; | |
1162 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1163 | STREAM_GET(&api_nh->gate.ipv4.s_addr, s, | |
1164 | IPV4_MAX_BYTELEN); | |
1165 | STREAM_GETL(s, api_nh->ifindex); | |
1166 | break; | |
1167 | case NEXTHOP_TYPE_IFINDEX: | |
1168 | STREAM_GETL(s, api_nh->ifindex); | |
1169 | break; | |
1170 | case NEXTHOP_TYPE_IPV6: | |
1171 | STREAM_GET(&api_nh->gate.ipv6, s, 16); | |
1172 | break; | |
1173 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1174 | STREAM_GET(&api_nh->gate.ipv6, s, 16); | |
1175 | STREAM_GETL(s, api_nh->ifindex); | |
1176 | break; | |
1177 | default: | |
1178 | zlog_warn( | |
1179 | "%s: Specified nexthop type %d does not exist", | |
1180 | __PRETTY_FUNCTION__, api_nh->type); | |
1181 | return -1; | |
1182 | } | |
1183 | ||
1184 | /* MPLS labels for BGP-LU or Segment Routing */ | |
1185 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL)) { | |
1186 | STREAM_GETC(s, api_nh->label_num); | |
1187 | ||
1188 | if (api_nh->label_num > MPLS_MAX_LABELS) { | |
1189 | zlog_warn( | |
1190 | "%s: invalid number of MPLS " | |
1191 | "labels (%u)", | |
1192 | __func__, api_nh->label_num); | |
1193 | return -1; | |
1194 | } | |
1195 | ||
1196 | STREAM_GET(&api_nh->labels[0], s, | |
1197 | api_nh->label_num | |
1198 | * sizeof(mpls_label_t)); | |
1199 | } | |
1200 | } | |
1201 | } | |
1202 | ||
1203 | /* Attributes. */ | |
1204 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_DISTANCE)) | |
1205 | STREAM_GETC(s, api->distance); | |
1206 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_METRIC)) | |
1207 | STREAM_GETL(s, api->metric); | |
1208 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_TAG)) | |
1209 | STREAM_GETL(s, api->tag); | |
1210 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_MTU)) | |
1211 | STREAM_GETL(s, api->mtu); | |
1212 | if (CHECK_FLAG(api->message, ZAPI_MESSAGE_TABLEID)) | |
1213 | STREAM_GETL(s, api->tableid); | |
1214 | ||
1215 | stream_failure: | |
1216 | return 0; | |
1217 | } | |
1218 | ||
1219 | bool zapi_route_notify_decode(struct stream *s, struct prefix *p, | |
1220 | uint32_t *tableid, | |
1221 | enum zapi_route_notify_owner *note) | |
1222 | { | |
1223 | uint32_t t; | |
1224 | ||
1225 | STREAM_GET(note, s, sizeof(*note)); | |
1226 | ||
1227 | STREAM_GETC(s, p->family); | |
1228 | STREAM_GETC(s, p->prefixlen); | |
1229 | STREAM_GET(&p->u.prefix, s, prefix_blen(p)); | |
1230 | STREAM_GETL(s, t); | |
1231 | ||
1232 | *tableid = t; | |
1233 | ||
1234 | return true; | |
1235 | ||
1236 | stream_failure: | |
1237 | return false; | |
1238 | } | |
1239 | ||
1240 | bool zapi_rule_notify_decode(struct stream *s, uint32_t *seqno, | |
1241 | uint32_t *priority, uint32_t *unique, | |
1242 | ifindex_t *ifindex, | |
1243 | enum zapi_rule_notify_owner *note) | |
1244 | { | |
1245 | uint32_t prio, seq, uni; | |
1246 | ifindex_t ifi; | |
1247 | ||
1248 | STREAM_GET(note, s, sizeof(*note)); | |
1249 | ||
1250 | STREAM_GETL(s, seq); | |
1251 | STREAM_GETL(s, prio); | |
1252 | STREAM_GETL(s, uni); | |
1253 | STREAM_GETL(s, ifi); | |
1254 | ||
1255 | if (zclient_debug) | |
1256 | zlog_debug("%s: %u %u %u %u", __PRETTY_FUNCTION__, | |
1257 | seq, prio, uni, ifi); | |
1258 | *seqno = seq; | |
1259 | *priority = prio; | |
1260 | *unique = uni; | |
1261 | *ifindex = ifi; | |
1262 | ||
1263 | return true; | |
1264 | ||
1265 | stream_failure: | |
1266 | return false; | |
1267 | } | |
1268 | ||
1269 | struct nexthop *nexthop_from_zapi_nexthop(struct zapi_nexthop *znh) | |
1270 | { | |
1271 | struct nexthop *n = nexthop_new(); | |
1272 | ||
1273 | n->type = znh->type; | |
1274 | n->vrf_id = znh->vrf_id; | |
1275 | n->ifindex = znh->ifindex; | |
1276 | n->gate = znh->gate; | |
1277 | ||
1278 | /* | |
1279 | * This function does not currently handle labels | |
1280 | */ | |
1281 | ||
1282 | return n; | |
1283 | } | |
1284 | ||
1285 | bool zapi_nexthop_update_decode(struct stream *s, struct zapi_route *nhr) | |
1286 | { | |
1287 | uint32_t i; | |
1288 | ||
1289 | memset(nhr, 0, sizeof(*nhr)); | |
1290 | ||
1291 | STREAM_GETW(s, nhr->prefix.family); | |
1292 | STREAM_GETC(s, nhr->prefix.prefixlen); | |
1293 | switch (nhr->prefix.family) { | |
1294 | case AF_INET: | |
1295 | STREAM_GET(&nhr->prefix.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN); | |
1296 | break; | |
1297 | case AF_INET6: | |
1298 | STREAM_GET(&nhr->prefix.u.prefix6, s, IPV6_MAX_BYTELEN); | |
1299 | break; | |
1300 | default: | |
1301 | break; | |
1302 | } | |
1303 | ||
1304 | STREAM_GETC(s, nhr->type); | |
1305 | STREAM_GETW(s, nhr->instance); | |
1306 | STREAM_GETC(s, nhr->distance); | |
1307 | STREAM_GETL(s, nhr->metric); | |
1308 | STREAM_GETC(s, nhr->nexthop_num); | |
1309 | ||
1310 | for (i = 0; i < nhr->nexthop_num; i++) { | |
1311 | STREAM_GETC(s, nhr->nexthops[i].type); | |
1312 | switch (nhr->nexthops[i].type) { | |
1313 | case NEXTHOP_TYPE_IPV4: | |
1314 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1315 | STREAM_GET(&nhr->nexthops[i].gate.ipv4.s_addr, s, | |
1316 | IPV4_MAX_BYTELEN); | |
1317 | STREAM_GETL(s, nhr->nexthops[i].ifindex); | |
1318 | break; | |
1319 | case NEXTHOP_TYPE_IFINDEX: | |
1320 | STREAM_GETL(s, nhr->nexthops[i].ifindex); | |
1321 | break; | |
1322 | case NEXTHOP_TYPE_IPV6: | |
1323 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1324 | STREAM_GET(&nhr->nexthops[i].gate.ipv6, s, | |
1325 | IPV6_MAX_BYTELEN); | |
1326 | STREAM_GETL(s, nhr->nexthops[i].ifindex); | |
1327 | break; | |
1328 | case NEXTHOP_TYPE_BLACKHOLE: | |
1329 | break; | |
1330 | } | |
1331 | } | |
1332 | ||
1333 | return true; | |
1334 | stream_failure: | |
1335 | return false; | |
1336 | } | |
1337 | ||
1338 | /* | |
1339 | * send a ZEBRA_REDISTRIBUTE_ADD or ZEBRA_REDISTRIBUTE_DELETE | |
1340 | * for the route type (ZEBRA_ROUTE_KERNEL etc.). The zebra server will | |
1341 | * then set/unset redist[type] in the client handle (a struct zserv) for the | |
1342 | * sending client | |
1343 | */ | |
1344 | int zebra_redistribute_send(int command, struct zclient *zclient, afi_t afi, | |
1345 | int type, u_short instance, vrf_id_t vrf_id) | |
1346 | { | |
1347 | struct stream *s; | |
1348 | ||
1349 | s = zclient->obuf; | |
1350 | stream_reset(s); | |
1351 | ||
1352 | zclient_create_header(s, command, vrf_id); | |
1353 | stream_putc(s, afi); | |
1354 | stream_putc(s, type); | |
1355 | stream_putw(s, instance); | |
1356 | ||
1357 | stream_putw_at(s, 0, stream_get_endp(s)); | |
1358 | ||
1359 | return zclient_send_message(zclient); | |
1360 | } | |
1361 | ||
1362 | /* Get prefix in ZServ format; family should be filled in on prefix */ | |
1363 | static void zclient_stream_get_prefix(struct stream *s, struct prefix *p) | |
1364 | { | |
1365 | size_t plen = prefix_blen(p); | |
1366 | u_char c; | |
1367 | p->prefixlen = 0; | |
1368 | ||
1369 | if (plen == 0) | |
1370 | return; | |
1371 | ||
1372 | stream_get(&p->u.prefix, s, plen); | |
1373 | STREAM_GETC(s, c); | |
1374 | p->prefixlen = MIN(plen * 8, c); | |
1375 | ||
1376 | stream_failure: | |
1377 | return; | |
1378 | } | |
1379 | ||
1380 | /* Router-id update from zebra daemon. */ | |
1381 | void zebra_router_id_update_read(struct stream *s, struct prefix *rid) | |
1382 | { | |
1383 | /* Fetch interface address. */ | |
1384 | STREAM_GETC(s, rid->family); | |
1385 | ||
1386 | zclient_stream_get_prefix(s, rid); | |
1387 | ||
1388 | stream_failure: | |
1389 | return; | |
1390 | } | |
1391 | ||
1392 | /* Interface addition from zebra daemon. */ | |
1393 | /* | |
1394 | * The format of the message sent with type ZEBRA_INTERFACE_ADD or | |
1395 | * ZEBRA_INTERFACE_DELETE from zebra to the client is: | |
1396 | * 0 1 2 3 | |
1397 | * 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 | |
1398 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1399 | * | ifname | | |
1400 | * | | | |
1401 | * | | | |
1402 | * | | | |
1403 | * | | | |
1404 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1405 | * | ifindex | | |
1406 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1407 | * | status | | |
1408 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1409 | * | if_flags | | |
1410 | * | | | |
1411 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1412 | * | metric | | |
1413 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1414 | * | speed | | |
1415 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1416 | * | ifmtu | | |
1417 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1418 | * | ifmtu6 | | |
1419 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1420 | * | bandwidth | | |
1421 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1422 | * | Link Layer Type | | |
1423 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1424 | * | Harware Address Length | | |
1425 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1426 | * | Hardware Address if HW lenght different from 0 | | |
1427 | * | ... max INTERFACE_HWADDR_MAX | | |
1428 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1429 | * | Link_params? | Whether a link-params follows: 1 or 0. | |
1430 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1431 | * | Link_params 0 or 1 INTERFACE_LINK_PARAMS_SIZE sized | | |
1432 | * | .... (struct if_link_params). | | |
1433 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
1434 | */ | |
1435 | ||
1436 | static void zclient_vrf_add(struct zclient *zclient, vrf_id_t vrf_id) | |
1437 | { | |
1438 | struct vrf *vrf; | |
1439 | char vrfname_tmp[VRF_NAMSIZ]; | |
1440 | struct vrf_data data; | |
1441 | ||
1442 | stream_get(&data, zclient->ibuf, sizeof(struct vrf_data)); | |
1443 | /* Read interface name. */ | |
1444 | stream_get(vrfname_tmp, zclient->ibuf, VRF_NAMSIZ); | |
1445 | ||
1446 | /* Lookup/create vrf by vrf_id. */ | |
1447 | vrf = vrf_get(vrf_id, vrfname_tmp); | |
1448 | vrf->data.l.table_id = data.l.table_id; | |
1449 | memcpy(vrf->data.l.netns_name, data.l.netns_name, NS_NAMSIZ); | |
1450 | vrf_enable(vrf); | |
1451 | } | |
1452 | ||
1453 | static void zclient_vrf_delete(struct zclient *zclient, vrf_id_t vrf_id) | |
1454 | { | |
1455 | struct vrf *vrf; | |
1456 | ||
1457 | /* Lookup vrf by vrf_id. */ | |
1458 | vrf = vrf_lookup_by_id(vrf_id); | |
1459 | ||
1460 | /* | |
1461 | * If a routing protocol doesn't know about a | |
1462 | * vrf that is about to be deleted. There is | |
1463 | * no point in attempting to delete it. | |
1464 | */ | |
1465 | if (!vrf) | |
1466 | return; | |
1467 | ||
1468 | vrf_delete(vrf); | |
1469 | } | |
1470 | ||
1471 | struct interface *zebra_interface_add_read(struct stream *s, vrf_id_t vrf_id) | |
1472 | { | |
1473 | struct interface *ifp; | |
1474 | char ifname_tmp[INTERFACE_NAMSIZ]; | |
1475 | ||
1476 | /* Read interface name. */ | |
1477 | stream_get(ifname_tmp, s, INTERFACE_NAMSIZ); | |
1478 | ||
1479 | /* Lookup/create interface by name. */ | |
1480 | ifp = if_get_by_name(ifname_tmp, vrf_id, 0); | |
1481 | ||
1482 | zebra_interface_if_set_value(s, ifp); | |
1483 | ||
1484 | return ifp; | |
1485 | } | |
1486 | ||
1487 | /* | |
1488 | * Read interface up/down msg (ZEBRA_INTERFACE_UP/ZEBRA_INTERFACE_DOWN) | |
1489 | * from zebra server. The format of this message is the same as | |
1490 | * that sent for ZEBRA_INTERFACE_ADD/ZEBRA_INTERFACE_DELETE (see | |
1491 | * comments for zebra_interface_add_read), except that no sockaddr_dl | |
1492 | * is sent at the tail of the message. | |
1493 | */ | |
1494 | struct interface *zebra_interface_state_read(struct stream *s, vrf_id_t vrf_id) | |
1495 | { | |
1496 | struct interface *ifp; | |
1497 | char ifname_tmp[INTERFACE_NAMSIZ]; | |
1498 | ||
1499 | /* Read interface name. */ | |
1500 | stream_get(ifname_tmp, s, INTERFACE_NAMSIZ); | |
1501 | ||
1502 | /* Lookup this by interface index. */ | |
1503 | ifp = if_lookup_by_name(ifname_tmp, vrf_id); | |
1504 | if (ifp == NULL) { | |
1505 | zlog_warn("INTERFACE_STATE: Cannot find IF %s in VRF %d", | |
1506 | ifname_tmp, vrf_id); | |
1507 | return NULL; | |
1508 | } | |
1509 | ||
1510 | zebra_interface_if_set_value(s, ifp); | |
1511 | ||
1512 | return ifp; | |
1513 | } | |
1514 | ||
1515 | static void link_params_set_value(struct stream *s, struct if_link_params *iflp) | |
1516 | { | |
1517 | ||
1518 | if (iflp == NULL) | |
1519 | return; | |
1520 | ||
1521 | iflp->lp_status = stream_getl(s); | |
1522 | iflp->te_metric = stream_getl(s); | |
1523 | iflp->max_bw = stream_getf(s); | |
1524 | iflp->max_rsv_bw = stream_getf(s); | |
1525 | uint32_t bwclassnum = stream_getl(s); | |
1526 | { | |
1527 | unsigned int i; | |
1528 | for (i = 0; i < bwclassnum && i < MAX_CLASS_TYPE; i++) | |
1529 | iflp->unrsv_bw[i] = stream_getf(s); | |
1530 | if (i < bwclassnum) | |
1531 | zlog_err( | |
1532 | "%s: received %d > %d (MAX_CLASS_TYPE) bw entries" | |
1533 | " - outdated library?", | |
1534 | __func__, bwclassnum, MAX_CLASS_TYPE); | |
1535 | } | |
1536 | iflp->admin_grp = stream_getl(s); | |
1537 | iflp->rmt_as = stream_getl(s); | |
1538 | iflp->rmt_ip.s_addr = stream_get_ipv4(s); | |
1539 | ||
1540 | iflp->av_delay = stream_getl(s); | |
1541 | iflp->min_delay = stream_getl(s); | |
1542 | iflp->max_delay = stream_getl(s); | |
1543 | iflp->delay_var = stream_getl(s); | |
1544 | ||
1545 | iflp->pkt_loss = stream_getf(s); | |
1546 | iflp->res_bw = stream_getf(s); | |
1547 | iflp->ava_bw = stream_getf(s); | |
1548 | iflp->use_bw = stream_getf(s); | |
1549 | } | |
1550 | ||
1551 | struct interface *zebra_interface_link_params_read(struct stream *s) | |
1552 | { | |
1553 | struct if_link_params *iflp; | |
1554 | ifindex_t ifindex; | |
1555 | ||
1556 | assert(s); | |
1557 | ||
1558 | ifindex = stream_getl(s); | |
1559 | ||
1560 | struct interface *ifp = if_lookup_by_index(ifindex, VRF_DEFAULT); | |
1561 | ||
1562 | if (ifp == NULL) { | |
1563 | zlog_err("%s: unknown ifindex %u, shouldn't happen", __func__, | |
1564 | ifindex); | |
1565 | return NULL; | |
1566 | } | |
1567 | ||
1568 | if ((iflp = if_link_params_get(ifp)) == NULL) | |
1569 | return NULL; | |
1570 | ||
1571 | link_params_set_value(s, iflp); | |
1572 | ||
1573 | return ifp; | |
1574 | } | |
1575 | ||
1576 | void zebra_interface_if_set_value(struct stream *s, struct interface *ifp) | |
1577 | { | |
1578 | u_char link_params_status = 0; | |
1579 | ||
1580 | /* Read interface's index. */ | |
1581 | if_set_index(ifp, stream_getl(s)); | |
1582 | ifp->status = stream_getc(s); | |
1583 | ||
1584 | /* Read interface's value. */ | |
1585 | ifp->flags = stream_getq(s); | |
1586 | ifp->ptm_enable = stream_getc(s); | |
1587 | ifp->ptm_status = stream_getc(s); | |
1588 | ifp->metric = stream_getl(s); | |
1589 | ifp->speed = stream_getl(s); | |
1590 | ifp->mtu = stream_getl(s); | |
1591 | ifp->mtu6 = stream_getl(s); | |
1592 | ifp->bandwidth = stream_getl(s); | |
1593 | ifp->ll_type = stream_getl(s); | |
1594 | ifp->hw_addr_len = stream_getl(s); | |
1595 | if (ifp->hw_addr_len) | |
1596 | stream_get(ifp->hw_addr, s, | |
1597 | MIN(ifp->hw_addr_len, INTERFACE_HWADDR_MAX)); | |
1598 | ||
1599 | /* Read Traffic Engineering status */ | |
1600 | link_params_status = stream_getc(s); | |
1601 | /* Then, Traffic Engineering parameters if any */ | |
1602 | if (link_params_status) { | |
1603 | struct if_link_params *iflp = if_link_params_get(ifp); | |
1604 | link_params_set_value(s, iflp); | |
1605 | } | |
1606 | } | |
1607 | ||
1608 | size_t zebra_interface_link_params_write(struct stream *s, | |
1609 | struct interface *ifp) | |
1610 | { | |
1611 | size_t w; | |
1612 | struct if_link_params *iflp; | |
1613 | int i; | |
1614 | ||
1615 | if (s == NULL || ifp == NULL || ifp->link_params == NULL) | |
1616 | return 0; | |
1617 | ||
1618 | iflp = ifp->link_params; | |
1619 | w = 0; | |
1620 | ||
1621 | w += stream_putl(s, iflp->lp_status); | |
1622 | ||
1623 | w += stream_putl(s, iflp->te_metric); | |
1624 | w += stream_putf(s, iflp->max_bw); | |
1625 | w += stream_putf(s, iflp->max_rsv_bw); | |
1626 | ||
1627 | w += stream_putl(s, MAX_CLASS_TYPE); | |
1628 | for (i = 0; i < MAX_CLASS_TYPE; i++) | |
1629 | w += stream_putf(s, iflp->unrsv_bw[i]); | |
1630 | ||
1631 | w += stream_putl(s, iflp->admin_grp); | |
1632 | w += stream_putl(s, iflp->rmt_as); | |
1633 | w += stream_put_in_addr(s, &iflp->rmt_ip); | |
1634 | ||
1635 | w += stream_putl(s, iflp->av_delay); | |
1636 | w += stream_putl(s, iflp->min_delay); | |
1637 | w += stream_putl(s, iflp->max_delay); | |
1638 | w += stream_putl(s, iflp->delay_var); | |
1639 | ||
1640 | w += stream_putf(s, iflp->pkt_loss); | |
1641 | w += stream_putf(s, iflp->res_bw); | |
1642 | w += stream_putf(s, iflp->ava_bw); | |
1643 | w += stream_putf(s, iflp->use_bw); | |
1644 | ||
1645 | return w; | |
1646 | } | |
1647 | ||
1648 | /* | |
1649 | * format of message for address additon is: | |
1650 | * 0 | |
1651 | * 0 1 2 3 4 5 6 7 | |
1652 | * +-+-+-+-+-+-+-+-+ | |
1653 | * | type | ZEBRA_INTERFACE_ADDRESS_ADD or | |
1654 | * +-+-+-+-+-+-+-+-+ ZEBRA_INTERFACE_ADDRES_DELETE | |
1655 | * | | | |
1656 | * + + | |
1657 | * | ifindex | | |
1658 | * + + | |
1659 | * | | | |
1660 | * + + | |
1661 | * | | | |
1662 | * +-+-+-+-+-+-+-+-+ | |
1663 | * | ifc_flags | flags for connected address | |
1664 | * +-+-+-+-+-+-+-+-+ | |
1665 | * | addr_family | | |
1666 | * +-+-+-+-+-+-+-+-+ | |
1667 | * | addr... | | |
1668 | * : : | |
1669 | * | | | |
1670 | * +-+-+-+-+-+-+-+-+ | |
1671 | * | addr_len | len of addr. E.g., addr_len = 4 for ipv4 addrs. | |
1672 | * +-+-+-+-+-+-+-+-+ | |
1673 | * | daddr.. | | |
1674 | * : : | |
1675 | * | | | |
1676 | * +-+-+-+-+-+-+-+-+ | |
1677 | */ | |
1678 | ||
1679 | static int memconstant(const void *s, int c, size_t n) | |
1680 | { | |
1681 | const u_char *p = s; | |
1682 | ||
1683 | while (n-- > 0) | |
1684 | if (*p++ != c) | |
1685 | return 0; | |
1686 | return 1; | |
1687 | } | |
1688 | ||
1689 | ||
1690 | struct connected *zebra_interface_address_read(int type, struct stream *s, | |
1691 | vrf_id_t vrf_id) | |
1692 | { | |
1693 | ifindex_t ifindex; | |
1694 | struct interface *ifp; | |
1695 | struct connected *ifc; | |
1696 | struct prefix p, d, *dp; | |
1697 | int plen; | |
1698 | u_char ifc_flags; | |
1699 | ||
1700 | memset(&p, 0, sizeof(p)); | |
1701 | memset(&d, 0, sizeof(d)); | |
1702 | ||
1703 | /* Get interface index. */ | |
1704 | ifindex = stream_getl(s); | |
1705 | ||
1706 | /* Lookup index. */ | |
1707 | ifp = if_lookup_by_index(ifindex, vrf_id); | |
1708 | if (ifp == NULL) { | |
1709 | zlog_warn("INTERFACE_ADDRESS_%s: Cannot find IF %u in VRF %d", | |
1710 | (type == ZEBRA_INTERFACE_ADDRESS_ADD) ? "ADD" : "DEL", | |
1711 | ifindex, vrf_id); | |
1712 | return NULL; | |
1713 | } | |
1714 | ||
1715 | /* Fetch flag. */ | |
1716 | ifc_flags = stream_getc(s); | |
1717 | ||
1718 | /* Fetch interface address. */ | |
1719 | d.family = p.family = stream_getc(s); | |
1720 | plen = prefix_blen(&d); | |
1721 | ||
1722 | zclient_stream_get_prefix(s, &p); | |
1723 | ||
1724 | /* Fetch destination address. */ | |
1725 | stream_get(&d.u.prefix, s, plen); | |
1726 | ||
1727 | /* N.B. NULL destination pointers are encoded as all zeroes */ | |
1728 | dp = memconstant(&d.u.prefix, 0, plen) ? NULL : &d; | |
1729 | ||
1730 | if (type == ZEBRA_INTERFACE_ADDRESS_ADD) { | |
1731 | ifc = connected_lookup_prefix_exact(ifp, &p); | |
1732 | if (!ifc) { | |
1733 | /* N.B. NULL destination pointers are encoded as all | |
1734 | * zeroes */ | |
1735 | ifc = connected_add_by_prefix(ifp, &p, dp); | |
1736 | } | |
1737 | if (ifc) { | |
1738 | ifc->flags = ifc_flags; | |
1739 | if (ifc->destination) | |
1740 | ifc->destination->prefixlen = | |
1741 | ifc->address->prefixlen; | |
1742 | else if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_PEER)) { | |
1743 | /* carp interfaces on OpenBSD with 0.0.0.0/0 as | |
1744 | * "peer" */ | |
1745 | char buf[PREFIX_STRLEN]; | |
1746 | zlog_warn( | |
1747 | "warning: interface %s address %s " | |
1748 | "with peer flag set, but no peer address!", | |
1749 | ifp->name, prefix2str(ifc->address, buf, | |
1750 | sizeof buf)); | |
1751 | UNSET_FLAG(ifc->flags, ZEBRA_IFA_PEER); | |
1752 | } | |
1753 | } | |
1754 | } else { | |
1755 | assert(type == ZEBRA_INTERFACE_ADDRESS_DELETE); | |
1756 | ifc = connected_delete_by_prefix(ifp, &p); | |
1757 | } | |
1758 | ||
1759 | return ifc; | |
1760 | } | |
1761 | ||
1762 | /* | |
1763 | * format of message for neighbor connected address is: | |
1764 | * 0 | |
1765 | * 0 1 2 3 4 5 6 7 | |
1766 | * +-+-+-+-+-+-+-+-+ | |
1767 | * | type | ZEBRA_INTERFACE_NBR_ADDRESS_ADD or | |
1768 | * +-+-+-+-+-+-+-+-+ ZEBRA_INTERFACE_NBR_ADDRES_DELETE | |
1769 | * | | | |
1770 | * + + | |
1771 | * | ifindex | | |
1772 | * + + | |
1773 | * | | | |
1774 | * + + | |
1775 | * | | | |
1776 | * +-+-+-+-+-+-+-+-+ | |
1777 | * | addr_family | | |
1778 | * +-+-+-+-+-+-+-+-+ | |
1779 | * | addr... | | |
1780 | * : : | |
1781 | * | | | |
1782 | * +-+-+-+-+-+-+-+-+ | |
1783 | * | addr_len | len of addr. | |
1784 | * +-+-+-+-+-+-+-+-+ | |
1785 | */ | |
1786 | struct nbr_connected * | |
1787 | zebra_interface_nbr_address_read(int type, struct stream *s, vrf_id_t vrf_id) | |
1788 | { | |
1789 | unsigned int ifindex; | |
1790 | struct interface *ifp; | |
1791 | struct prefix p; | |
1792 | struct nbr_connected *ifc; | |
1793 | ||
1794 | /* Get interface index. */ | |
1795 | ifindex = stream_getl(s); | |
1796 | ||
1797 | /* Lookup index. */ | |
1798 | ifp = if_lookup_by_index(ifindex, vrf_id); | |
1799 | if (ifp == NULL) { | |
1800 | zlog_warn("INTERFACE_NBR_%s: Cannot find IF %u in VRF %d", | |
1801 | (type == ZEBRA_INTERFACE_NBR_ADDRESS_ADD) ? "ADD" | |
1802 | : "DELETE", | |
1803 | ifindex, vrf_id); | |
1804 | return NULL; | |
1805 | } | |
1806 | ||
1807 | p.family = stream_getc(s); | |
1808 | stream_get(&p.u.prefix, s, prefix_blen(&p)); | |
1809 | p.prefixlen = stream_getc(s); | |
1810 | ||
1811 | if (type == ZEBRA_INTERFACE_NBR_ADDRESS_ADD) { | |
1812 | /* Currently only supporting P2P links, so any new RA source | |
1813 | address is | |
1814 | considered as the replacement of the previously learnt | |
1815 | Link-Local address. */ | |
1816 | if (!(ifc = listnode_head(ifp->nbr_connected))) { | |
1817 | ifc = nbr_connected_new(); | |
1818 | ifc->address = prefix_new(); | |
1819 | ifc->ifp = ifp; | |
1820 | listnode_add(ifp->nbr_connected, ifc); | |
1821 | } | |
1822 | ||
1823 | prefix_copy(ifc->address, &p); | |
1824 | } else { | |
1825 | assert(type == ZEBRA_INTERFACE_NBR_ADDRESS_DELETE); | |
1826 | ||
1827 | ifc = nbr_connected_check(ifp, &p); | |
1828 | if (ifc) | |
1829 | listnode_delete(ifp->nbr_connected, ifc); | |
1830 | } | |
1831 | ||
1832 | return ifc; | |
1833 | } | |
1834 | ||
1835 | struct interface *zebra_interface_vrf_update_read(struct stream *s, | |
1836 | vrf_id_t vrf_id, | |
1837 | vrf_id_t *new_vrf_id) | |
1838 | { | |
1839 | unsigned int ifindex; | |
1840 | struct interface *ifp; | |
1841 | vrf_id_t new_id; | |
1842 | ||
1843 | /* Get interface index. */ | |
1844 | ifindex = stream_getl(s); | |
1845 | ||
1846 | /* Lookup interface. */ | |
1847 | ifp = if_lookup_by_index(ifindex, vrf_id); | |
1848 | if (ifp == NULL) { | |
1849 | zlog_warn("INTERFACE_VRF_UPDATE: Cannot find IF %u in VRF %d", | |
1850 | ifindex, vrf_id); | |
1851 | return NULL; | |
1852 | } | |
1853 | ||
1854 | /* Fetch new VRF Id. */ | |
1855 | new_id = stream_getw(s); | |
1856 | ||
1857 | *new_vrf_id = new_id; | |
1858 | return ifp; | |
1859 | } | |
1860 | ||
1861 | /* filter unwanted messages until the expected one arrives */ | |
1862 | static int zclient_read_sync_response(struct zclient *zclient, | |
1863 | u_int16_t expected_cmd) | |
1864 | { | |
1865 | struct stream *s; | |
1866 | u_int16_t size = -1; | |
1867 | u_char marker; | |
1868 | u_char version; | |
1869 | vrf_id_t vrf_id; | |
1870 | u_int16_t cmd; | |
1871 | fd_set readfds; | |
1872 | int ret; | |
1873 | ||
1874 | ret = 0; | |
1875 | cmd = expected_cmd + 1; | |
1876 | while (ret == 0 && cmd != expected_cmd) { | |
1877 | s = zclient->ibuf; | |
1878 | stream_reset(s); | |
1879 | ||
1880 | /* wait until response arrives */ | |
1881 | FD_ZERO(&readfds); | |
1882 | FD_SET(zclient->sock, &readfds); | |
1883 | select(zclient->sock + 1, &readfds, NULL, NULL, NULL); | |
1884 | if (!FD_ISSET(zclient->sock, &readfds)) | |
1885 | continue; | |
1886 | /* read response */ | |
1887 | ret = zclient_read_header(s, zclient->sock, &size, &marker, | |
1888 | &version, &vrf_id, &cmd); | |
1889 | if (zclient_debug) | |
1890 | zlog_debug("%s: Response (%d bytes) received", __func__, | |
1891 | size); | |
1892 | } | |
1893 | if (ret != 0) { | |
1894 | zlog_err("%s: Invalid Sync Message Reply", __func__); | |
1895 | return -1; | |
1896 | } | |
1897 | ||
1898 | return 0; | |
1899 | } | |
1900 | /** | |
1901 | * Connect to label manager in a syncronous way | |
1902 | * | |
1903 | * It first writes the request to zcient output buffer and then | |
1904 | * immediately reads the answer from the input buffer. | |
1905 | * | |
1906 | * @param zclient Zclient used to connect to label manager (zebra) | |
1907 | * @result Result of response | |
1908 | */ | |
1909 | int lm_label_manager_connect(struct zclient *zclient) | |
1910 | { | |
1911 | int ret; | |
1912 | struct stream *s; | |
1913 | u_char result; | |
1914 | ||
1915 | if (zclient_debug) | |
1916 | zlog_debug("Connecting to Label Manager"); | |
1917 | ||
1918 | if (zclient->sock < 0) | |
1919 | return -1; | |
1920 | ||
1921 | /* send request */ | |
1922 | s = zclient->obuf; | |
1923 | stream_reset(s); | |
1924 | zclient_create_header(s, ZEBRA_LABEL_MANAGER_CONNECT, VRF_DEFAULT); | |
1925 | ||
1926 | /* proto */ | |
1927 | stream_putc(s, zclient->redist_default); | |
1928 | /* instance */ | |
1929 | stream_putw(s, zclient->instance); | |
1930 | ||
1931 | /* Put length at the first point of the stream. */ | |
1932 | stream_putw_at(s, 0, stream_get_endp(s)); | |
1933 | ||
1934 | ret = writen(zclient->sock, s->data, stream_get_endp(s)); | |
1935 | if (ret < 0) { | |
1936 | zlog_err("%s: can't write to zclient->sock", __func__); | |
1937 | close(zclient->sock); | |
1938 | zclient->sock = -1; | |
1939 | return -1; | |
1940 | } | |
1941 | if (ret == 0) { | |
1942 | zlog_err("%s: zclient->sock connection closed", __func__); | |
1943 | close(zclient->sock); | |
1944 | zclient->sock = -1; | |
1945 | return -1; | |
1946 | } | |
1947 | if (zclient_debug) | |
1948 | zlog_debug("%s: Label manager connect request (%d bytes) sent", | |
1949 | __func__, ret); | |
1950 | ||
1951 | /* read response */ | |
1952 | if (zclient_read_sync_response(zclient, ZEBRA_LABEL_MANAGER_CONNECT) | |
1953 | != 0) | |
1954 | return -1; | |
1955 | ||
1956 | /* result */ | |
1957 | s = zclient->ibuf; | |
1958 | result = stream_getc(s); | |
1959 | if (zclient_debug) | |
1960 | zlog_debug( | |
1961 | "%s: Label Manager connect response received, result %u", | |
1962 | __func__, result); | |
1963 | ||
1964 | return (int)result; | |
1965 | } | |
1966 | ||
1967 | /** | |
1968 | * Function to request a label chunk in a syncronous way | |
1969 | * | |
1970 | * It first writes the request to zlcient output buffer and then | |
1971 | * immediately reads the answer from the input buffer. | |
1972 | * | |
1973 | * @param zclient Zclient used to connect to label manager (zebra) | |
1974 | * @param keep Avoid garbage collection | |
1975 | * @param chunk_size Amount of labels requested | |
1976 | * @param start To write first assigned chunk label to | |
1977 | * @param end To write last assigned chunk label to | |
1978 | * @result 0 on success, -1 otherwise | |
1979 | */ | |
1980 | int lm_get_label_chunk(struct zclient *zclient, u_char keep, | |
1981 | uint32_t chunk_size, uint32_t *start, uint32_t *end) | |
1982 | { | |
1983 | int ret; | |
1984 | struct stream *s; | |
1985 | u_char response_keep; | |
1986 | ||
1987 | if (zclient_debug) | |
1988 | zlog_debug("Getting Label Chunk"); | |
1989 | ||
1990 | if (zclient->sock < 0) | |
1991 | return -1; | |
1992 | ||
1993 | /* send request */ | |
1994 | s = zclient->obuf; | |
1995 | stream_reset(s); | |
1996 | zclient_create_header(s, ZEBRA_GET_LABEL_CHUNK, VRF_DEFAULT); | |
1997 | /* keep */ | |
1998 | stream_putc(s, keep); | |
1999 | /* chunk size */ | |
2000 | stream_putl(s, chunk_size); | |
2001 | /* Put length at the first point of the stream. */ | |
2002 | stream_putw_at(s, 0, stream_get_endp(s)); | |
2003 | ||
2004 | ret = writen(zclient->sock, s->data, stream_get_endp(s)); | |
2005 | if (ret < 0) { | |
2006 | zlog_err("%s: can't write to zclient->sock", __func__); | |
2007 | close(zclient->sock); | |
2008 | zclient->sock = -1; | |
2009 | return -1; | |
2010 | } | |
2011 | if (ret == 0) { | |
2012 | zlog_err("%s: zclient->sock connection closed", __func__); | |
2013 | close(zclient->sock); | |
2014 | zclient->sock = -1; | |
2015 | return -1; | |
2016 | } | |
2017 | if (zclient_debug) | |
2018 | zlog_debug("%s: Label chunk request (%d bytes) sent", __func__, | |
2019 | ret); | |
2020 | ||
2021 | /* read response */ | |
2022 | if (zclient_read_sync_response(zclient, ZEBRA_GET_LABEL_CHUNK) != 0) | |
2023 | return -1; | |
2024 | ||
2025 | s = zclient->ibuf; | |
2026 | /* keep */ | |
2027 | response_keep = stream_getc(s); | |
2028 | /* start and end labels */ | |
2029 | *start = stream_getl(s); | |
2030 | *end = stream_getl(s); | |
2031 | ||
2032 | /* not owning this response */ | |
2033 | if (keep != response_keep) { | |
2034 | zlog_err( | |
2035 | "%s: Invalid Label chunk: %u - %u, keeps mismatch %u != %u", | |
2036 | __func__, *start, *end, keep, response_keep); | |
2037 | } | |
2038 | /* sanity */ | |
2039 | if (*start > *end || *start < MPLS_LABEL_UNRESERVED_MIN | |
2040 | || *end > MPLS_LABEL_UNRESERVED_MAX) { | |
2041 | zlog_err("%s: Invalid Label chunk: %u - %u", __func__, *start, | |
2042 | *end); | |
2043 | return -1; | |
2044 | } | |
2045 | ||
2046 | if (zclient_debug) | |
2047 | zlog_debug("Label Chunk assign: %u - %u (%u) ", *start, *end, | |
2048 | response_keep); | |
2049 | ||
2050 | return 0; | |
2051 | } | |
2052 | ||
2053 | /** | |
2054 | * Function to release a label chunk | |
2055 | * | |
2056 | * @param zclient Zclient used to connect to label manager (zebra) | |
2057 | * @param start First label of chunk | |
2058 | * @param end Last label of chunk | |
2059 | * @result 0 on success, -1 otherwise | |
2060 | */ | |
2061 | int lm_release_label_chunk(struct zclient *zclient, uint32_t start, | |
2062 | uint32_t end) | |
2063 | { | |
2064 | int ret; | |
2065 | struct stream *s; | |
2066 | ||
2067 | if (zclient_debug) | |
2068 | zlog_debug("Releasing Label Chunk"); | |
2069 | ||
2070 | if (zclient->sock < 0) | |
2071 | return -1; | |
2072 | ||
2073 | /* send request */ | |
2074 | s = zclient->obuf; | |
2075 | stream_reset(s); | |
2076 | zclient_create_header(s, ZEBRA_RELEASE_LABEL_CHUNK, VRF_DEFAULT); | |
2077 | ||
2078 | /* start */ | |
2079 | stream_putl(s, start); | |
2080 | /* end */ | |
2081 | stream_putl(s, end); | |
2082 | ||
2083 | /* Put length at the first point of the stream. */ | |
2084 | stream_putw_at(s, 0, stream_get_endp(s)); | |
2085 | ||
2086 | ret = writen(zclient->sock, s->data, stream_get_endp(s)); | |
2087 | if (ret < 0) { | |
2088 | zlog_err("%s: can't write to zclient->sock", __func__); | |
2089 | close(zclient->sock); | |
2090 | zclient->sock = -1; | |
2091 | return -1; | |
2092 | } | |
2093 | if (ret == 0) { | |
2094 | zlog_err("%s: zclient->sock connection closed", __func__); | |
2095 | close(zclient->sock); | |
2096 | zclient->sock = -1; | |
2097 | return -1; | |
2098 | } | |
2099 | ||
2100 | return 0; | |
2101 | } | |
2102 | ||
2103 | int zebra_send_pw(struct zclient *zclient, int command, struct zapi_pw *pw) | |
2104 | { | |
2105 | struct stream *s; | |
2106 | ||
2107 | /* Reset stream. */ | |
2108 | s = zclient->obuf; | |
2109 | stream_reset(s); | |
2110 | ||
2111 | zclient_create_header(s, command, VRF_DEFAULT); | |
2112 | stream_write(s, pw->ifname, IF_NAMESIZE); | |
2113 | stream_putl(s, pw->ifindex); | |
2114 | ||
2115 | /* Put type */ | |
2116 | stream_putl(s, pw->type); | |
2117 | ||
2118 | /* Put nexthop */ | |
2119 | stream_putl(s, pw->af); | |
2120 | switch (pw->af) { | |
2121 | case AF_INET: | |
2122 | stream_put_in_addr(s, &pw->nexthop.ipv4); | |
2123 | break; | |
2124 | case AF_INET6: | |
2125 | stream_write(s, (u_char *)&pw->nexthop.ipv6, 16); | |
2126 | break; | |
2127 | default: | |
2128 | zlog_err("%s: unknown af", __func__); | |
2129 | return -1; | |
2130 | } | |
2131 | ||
2132 | /* Put labels */ | |
2133 | stream_putl(s, pw->local_label); | |
2134 | stream_putl(s, pw->remote_label); | |
2135 | ||
2136 | /* Put flags */ | |
2137 | stream_putc(s, pw->flags); | |
2138 | ||
2139 | /* Protocol specific fields */ | |
2140 | stream_write(s, &pw->data, sizeof(union pw_protocol_fields)); | |
2141 | ||
2142 | /* Put length at the first point of the stream. */ | |
2143 | stream_putw_at(s, 0, stream_get_endp(s)); | |
2144 | ||
2145 | return zclient_send_message(zclient); | |
2146 | } | |
2147 | ||
2148 | /* | |
2149 | * Receive PW status update from Zebra and send it to LDE process. | |
2150 | */ | |
2151 | void zebra_read_pw_status_update(int command, struct zclient *zclient, | |
2152 | zebra_size_t length, vrf_id_t vrf_id, | |
2153 | struct zapi_pw_status *pw) | |
2154 | { | |
2155 | struct stream *s; | |
2156 | ||
2157 | memset(pw, 0, sizeof(struct zapi_pw_status)); | |
2158 | s = zclient->ibuf; | |
2159 | ||
2160 | /* Get data. */ | |
2161 | stream_get(pw->ifname, s, IF_NAMESIZE); | |
2162 | pw->ifindex = stream_getl(s); | |
2163 | pw->status = stream_getl(s); | |
2164 | } | |
2165 | ||
2166 | /* Zebra client message read function. */ | |
2167 | static int zclient_read(struct thread *thread) | |
2168 | { | |
2169 | size_t already; | |
2170 | uint16_t length, command; | |
2171 | uint8_t marker, version; | |
2172 | vrf_id_t vrf_id; | |
2173 | struct zclient *zclient; | |
2174 | ||
2175 | /* Get socket to zebra. */ | |
2176 | zclient = THREAD_ARG(thread); | |
2177 | zclient->t_read = NULL; | |
2178 | ||
2179 | /* Read zebra header (if we don't have it already). */ | |
2180 | if ((already = stream_get_endp(zclient->ibuf)) < ZEBRA_HEADER_SIZE) { | |
2181 | ssize_t nbyte; | |
2182 | if (((nbyte = stream_read_try(zclient->ibuf, zclient->sock, | |
2183 | ZEBRA_HEADER_SIZE - already)) | |
2184 | == 0) | |
2185 | || (nbyte == -1)) { | |
2186 | if (zclient_debug) | |
2187 | zlog_debug( | |
2188 | "zclient connection closed socket [%d].", | |
2189 | zclient->sock); | |
2190 | return zclient_failed(zclient); | |
2191 | } | |
2192 | if (nbyte != (ssize_t)(ZEBRA_HEADER_SIZE - already)) { | |
2193 | /* Try again later. */ | |
2194 | zclient_event(ZCLIENT_READ, zclient); | |
2195 | return 0; | |
2196 | } | |
2197 | already = ZEBRA_HEADER_SIZE; | |
2198 | } | |
2199 | ||
2200 | /* Reset to read from the beginning of the incoming packet. */ | |
2201 | stream_set_getp(zclient->ibuf, 0); | |
2202 | ||
2203 | /* Fetch header values. */ | |
2204 | length = stream_getw(zclient->ibuf); | |
2205 | marker = stream_getc(zclient->ibuf); | |
2206 | version = stream_getc(zclient->ibuf); | |
2207 | vrf_id = stream_getl(zclient->ibuf); | |
2208 | command = stream_getw(zclient->ibuf); | |
2209 | ||
2210 | if (marker != ZEBRA_HEADER_MARKER || version != ZSERV_VERSION) { | |
2211 | zlog_err( | |
2212 | "%s: socket %d version mismatch, marker %d, version %d", | |
2213 | __func__, zclient->sock, marker, version); | |
2214 | return zclient_failed(zclient); | |
2215 | } | |
2216 | ||
2217 | if (length < ZEBRA_HEADER_SIZE) { | |
2218 | zlog_err("%s: socket %d message length %u is less than %d ", | |
2219 | __func__, zclient->sock, length, ZEBRA_HEADER_SIZE); | |
2220 | return zclient_failed(zclient); | |
2221 | } | |
2222 | ||
2223 | /* Length check. */ | |
2224 | if (length > STREAM_SIZE(zclient->ibuf)) { | |
2225 | struct stream *ns; | |
2226 | zlog_warn( | |
2227 | "%s: message size %u exceeds buffer size %lu, expanding...", | |
2228 | __func__, length, (u_long)STREAM_SIZE(zclient->ibuf)); | |
2229 | ns = stream_new(length); | |
2230 | stream_copy(ns, zclient->ibuf); | |
2231 | stream_free(zclient->ibuf); | |
2232 | zclient->ibuf = ns; | |
2233 | } | |
2234 | ||
2235 | /* Read rest of zebra packet. */ | |
2236 | if (already < length) { | |
2237 | ssize_t nbyte; | |
2238 | if (((nbyte = stream_read_try(zclient->ibuf, zclient->sock, | |
2239 | length - already)) | |
2240 | == 0) | |
2241 | || (nbyte == -1)) { | |
2242 | if (zclient_debug) | |
2243 | zlog_debug( | |
2244 | "zclient connection closed socket [%d].", | |
2245 | zclient->sock); | |
2246 | return zclient_failed(zclient); | |
2247 | } | |
2248 | if (nbyte != (ssize_t)(length - already)) { | |
2249 | /* Try again later. */ | |
2250 | zclient_event(ZCLIENT_READ, zclient); | |
2251 | return 0; | |
2252 | } | |
2253 | } | |
2254 | ||
2255 | length -= ZEBRA_HEADER_SIZE; | |
2256 | ||
2257 | if (zclient_debug) | |
2258 | zlog_debug("zclient 0x%p command 0x%x VRF %u\n", | |
2259 | (void *)zclient, command, vrf_id); | |
2260 | ||
2261 | switch (command) { | |
2262 | case ZEBRA_ROUTER_ID_UPDATE: | |
2263 | if (zclient->router_id_update) | |
2264 | (*zclient->router_id_update)(command, zclient, length, | |
2265 | vrf_id); | |
2266 | break; | |
2267 | case ZEBRA_VRF_ADD: | |
2268 | zclient_vrf_add(zclient, vrf_id); | |
2269 | break; | |
2270 | case ZEBRA_VRF_DELETE: | |
2271 | zclient_vrf_delete(zclient, vrf_id); | |
2272 | break; | |
2273 | case ZEBRA_INTERFACE_ADD: | |
2274 | if (zclient->interface_add) | |
2275 | (*zclient->interface_add)(command, zclient, length, | |
2276 | vrf_id); | |
2277 | break; | |
2278 | case ZEBRA_INTERFACE_DELETE: | |
2279 | if (zclient->interface_delete) | |
2280 | (*zclient->interface_delete)(command, zclient, length, | |
2281 | vrf_id); | |
2282 | break; | |
2283 | case ZEBRA_INTERFACE_ADDRESS_ADD: | |
2284 | if (zclient->interface_address_add) | |
2285 | (*zclient->interface_address_add)(command, zclient, | |
2286 | length, vrf_id); | |
2287 | break; | |
2288 | case ZEBRA_INTERFACE_ADDRESS_DELETE: | |
2289 | if (zclient->interface_address_delete) | |
2290 | (*zclient->interface_address_delete)(command, zclient, | |
2291 | length, vrf_id); | |
2292 | break; | |
2293 | case ZEBRA_INTERFACE_BFD_DEST_UPDATE: | |
2294 | if (zclient->interface_bfd_dest_update) | |
2295 | (*zclient->interface_bfd_dest_update)(command, zclient, | |
2296 | length, vrf_id); | |
2297 | break; | |
2298 | case ZEBRA_INTERFACE_NBR_ADDRESS_ADD: | |
2299 | if (zclient->interface_nbr_address_add) | |
2300 | (*zclient->interface_nbr_address_add)(command, zclient, | |
2301 | length, vrf_id); | |
2302 | break; | |
2303 | case ZEBRA_INTERFACE_NBR_ADDRESS_DELETE: | |
2304 | if (zclient->interface_nbr_address_delete) | |
2305 | (*zclient->interface_nbr_address_delete)( | |
2306 | command, zclient, length, vrf_id); | |
2307 | break; | |
2308 | case ZEBRA_INTERFACE_UP: | |
2309 | if (zclient->interface_up) | |
2310 | (*zclient->interface_up)(command, zclient, length, | |
2311 | vrf_id); | |
2312 | break; | |
2313 | case ZEBRA_INTERFACE_DOWN: | |
2314 | if (zclient->interface_down) | |
2315 | (*zclient->interface_down)(command, zclient, length, | |
2316 | vrf_id); | |
2317 | break; | |
2318 | case ZEBRA_INTERFACE_VRF_UPDATE: | |
2319 | if (zclient->interface_vrf_update) | |
2320 | (*zclient->interface_vrf_update)(command, zclient, | |
2321 | length, vrf_id); | |
2322 | break; | |
2323 | case ZEBRA_NEXTHOP_UPDATE: | |
2324 | if (zclient_debug) | |
2325 | zlog_debug("zclient rcvd nexthop update\n"); | |
2326 | if (zclient->nexthop_update) | |
2327 | (*zclient->nexthop_update)(command, zclient, length, | |
2328 | vrf_id); | |
2329 | break; | |
2330 | case ZEBRA_IMPORT_CHECK_UPDATE: | |
2331 | if (zclient_debug) | |
2332 | zlog_debug("zclient rcvd import check update\n"); | |
2333 | if (zclient->import_check_update) | |
2334 | (*zclient->import_check_update)(command, zclient, | |
2335 | length, vrf_id); | |
2336 | break; | |
2337 | case ZEBRA_BFD_DEST_REPLAY: | |
2338 | if (zclient->bfd_dest_replay) | |
2339 | (*zclient->bfd_dest_replay)(command, zclient, length, | |
2340 | vrf_id); | |
2341 | break; | |
2342 | case ZEBRA_REDISTRIBUTE_ROUTE_ADD: | |
2343 | if (zclient->redistribute_route_add) | |
2344 | (*zclient->redistribute_route_add)(command, zclient, | |
2345 | length, vrf_id); | |
2346 | break; | |
2347 | case ZEBRA_REDISTRIBUTE_ROUTE_DEL: | |
2348 | if (zclient->redistribute_route_del) | |
2349 | (*zclient->redistribute_route_del)(command, zclient, | |
2350 | length, vrf_id); | |
2351 | break; | |
2352 | case ZEBRA_INTERFACE_LINK_PARAMS: | |
2353 | if (zclient->interface_link_params) | |
2354 | (*zclient->interface_link_params)(command, zclient, | |
2355 | length); | |
2356 | break; | |
2357 | case ZEBRA_FEC_UPDATE: | |
2358 | if (zclient_debug) | |
2359 | zlog_debug("zclient rcvd fec update\n"); | |
2360 | if (zclient->fec_update) | |
2361 | (*zclient->fec_update)(command, zclient, length); | |
2362 | break; | |
2363 | case ZEBRA_VNI_ADD: | |
2364 | if (zclient->local_vni_add) | |
2365 | (*zclient->local_vni_add)(command, zclient, length, | |
2366 | vrf_id); | |
2367 | break; | |
2368 | case ZEBRA_VNI_DEL: | |
2369 | if (zclient->local_vni_del) | |
2370 | (*zclient->local_vni_del)(command, zclient, length, | |
2371 | vrf_id); | |
2372 | break; | |
2373 | case ZEBRA_L3VNI_ADD: | |
2374 | if (zclient->local_l3vni_add) | |
2375 | (*zclient->local_l3vni_add)(command, zclient, length, | |
2376 | vrf_id); | |
2377 | break; | |
2378 | case ZEBRA_L3VNI_DEL: | |
2379 | if (zclient->local_l3vni_del) | |
2380 | (*zclient->local_l3vni_del)(command, zclient, length, | |
2381 | vrf_id); | |
2382 | break; | |
2383 | case ZEBRA_MACIP_ADD: | |
2384 | if (zclient->local_macip_add) | |
2385 | (*zclient->local_macip_add)(command, zclient, length, | |
2386 | vrf_id); | |
2387 | break; | |
2388 | case ZEBRA_MACIP_DEL: | |
2389 | if (zclient->local_macip_del) | |
2390 | (*zclient->local_macip_del)(command, zclient, length, | |
2391 | vrf_id); | |
2392 | break; | |
2393 | case ZEBRA_IP_PREFIX_ROUTE_ADD: | |
2394 | if (zclient->local_ip_prefix_add) | |
2395 | (*zclient->local_ip_prefix_add)(command, zclient, | |
2396 | length, vrf_id); | |
2397 | break; | |
2398 | case ZEBRA_IP_PREFIX_ROUTE_DEL: | |
2399 | if (zclient->local_ip_prefix_del) | |
2400 | (*zclient->local_ip_prefix_del)(command, zclient, | |
2401 | length, vrf_id); | |
2402 | break; | |
2403 | case ZEBRA_PW_STATUS_UPDATE: | |
2404 | if (zclient->pw_status_update) | |
2405 | (*zclient->pw_status_update)(command, zclient, length, | |
2406 | vrf_id); | |
2407 | break; | |
2408 | case ZEBRA_ROUTE_NOTIFY_OWNER: | |
2409 | if (zclient->route_notify_owner) | |
2410 | (*zclient->route_notify_owner)(command, zclient, length, | |
2411 | vrf_id); | |
2412 | break; | |
2413 | case ZEBRA_RULE_NOTIFY_OWNER: | |
2414 | if (zclient->rule_notify_owner) | |
2415 | (*zclient->rule_notify_owner)(command, zclient, length, | |
2416 | vrf_id); | |
2417 | default: | |
2418 | break; | |
2419 | } | |
2420 | ||
2421 | if (zclient->sock < 0) | |
2422 | /* Connection was closed during packet processing. */ | |
2423 | return -1; | |
2424 | ||
2425 | /* Register read thread. */ | |
2426 | stream_reset(zclient->ibuf); | |
2427 | zclient_event(ZCLIENT_READ, zclient); | |
2428 | ||
2429 | return 0; | |
2430 | } | |
2431 | ||
2432 | void zclient_redistribute(int command, struct zclient *zclient, afi_t afi, | |
2433 | int type, u_short instance, vrf_id_t vrf_id) | |
2434 | { | |
2435 | ||
2436 | if (instance) { | |
2437 | if (command == ZEBRA_REDISTRIBUTE_ADD) { | |
2438 | if (redist_check_instance( | |
2439 | &zclient->mi_redist[afi][type], instance)) | |
2440 | return; | |
2441 | redist_add_instance(&zclient->mi_redist[afi][type], | |
2442 | instance); | |
2443 | } else { | |
2444 | if (!redist_check_instance( | |
2445 | &zclient->mi_redist[afi][type], instance)) | |
2446 | return; | |
2447 | redist_del_instance(&zclient->mi_redist[afi][type], | |
2448 | instance); | |
2449 | } | |
2450 | ||
2451 | } else { | |
2452 | if (command == ZEBRA_REDISTRIBUTE_ADD) { | |
2453 | if (vrf_bitmap_check(zclient->redist[afi][type], | |
2454 | vrf_id)) | |
2455 | return; | |
2456 | vrf_bitmap_set(zclient->redist[afi][type], vrf_id); | |
2457 | } else { | |
2458 | if (!vrf_bitmap_check(zclient->redist[afi][type], | |
2459 | vrf_id)) | |
2460 | return; | |
2461 | vrf_bitmap_unset(zclient->redist[afi][type], vrf_id); | |
2462 | } | |
2463 | } | |
2464 | ||
2465 | if (zclient->sock > 0) | |
2466 | zebra_redistribute_send(command, zclient, afi, type, instance, | |
2467 | vrf_id); | |
2468 | } | |
2469 | ||
2470 | ||
2471 | void zclient_redistribute_default(int command, struct zclient *zclient, | |
2472 | vrf_id_t vrf_id) | |
2473 | { | |
2474 | ||
2475 | if (command == ZEBRA_REDISTRIBUTE_DEFAULT_ADD) { | |
2476 | if (vrf_bitmap_check(zclient->default_information, vrf_id)) | |
2477 | return; | |
2478 | vrf_bitmap_set(zclient->default_information, vrf_id); | |
2479 | } else { | |
2480 | if (!vrf_bitmap_check(zclient->default_information, vrf_id)) | |
2481 | return; | |
2482 | vrf_bitmap_unset(zclient->default_information, vrf_id); | |
2483 | } | |
2484 | ||
2485 | if (zclient->sock > 0) | |
2486 | zebra_message_send(zclient, command, vrf_id); | |
2487 | } | |
2488 | ||
2489 | static void zclient_event(enum event event, struct zclient *zclient) | |
2490 | { | |
2491 | switch (event) { | |
2492 | case ZCLIENT_SCHEDULE: | |
2493 | thread_add_event(zclient->master, zclient_connect, zclient, 0, | |
2494 | &zclient->t_connect); | |
2495 | break; | |
2496 | case ZCLIENT_CONNECT: | |
2497 | if (zclient_debug) | |
2498 | zlog_debug( | |
2499 | "zclient connect failures: %d schedule interval is now %d", | |
2500 | zclient->fail, zclient->fail < 3 ? 10 : 60); | |
2501 | thread_add_timer(zclient->master, zclient_connect, zclient, | |
2502 | zclient->fail < 3 ? 10 : 60, | |
2503 | &zclient->t_connect); | |
2504 | break; | |
2505 | case ZCLIENT_READ: | |
2506 | zclient->t_read = NULL; | |
2507 | thread_add_read(zclient->master, zclient_read, zclient, | |
2508 | zclient->sock, &zclient->t_read); | |
2509 | break; | |
2510 | } | |
2511 | } | |
2512 | ||
2513 | void zclient_interface_set_master(struct zclient *client, | |
2514 | struct interface *master, | |
2515 | struct interface *slave) | |
2516 | { | |
2517 | struct stream *s; | |
2518 | ||
2519 | s = client->obuf; | |
2520 | stream_reset(s); | |
2521 | ||
2522 | zclient_create_header(s, ZEBRA_INTERFACE_SET_MASTER, master->vrf_id); | |
2523 | ||
2524 | stream_putl(s, master->vrf_id); | |
2525 | stream_putl(s, master->ifindex); | |
2526 | stream_putl(s, slave->vrf_id); | |
2527 | stream_putl(s, slave->ifindex); | |
2528 | ||
2529 | stream_putw_at(s, 0, stream_get_endp(s)); | |
2530 | zclient_send_message(client); | |
2531 | } |