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d3af6147 RZ |
1 | /* |
2 | * BFD PTM adapter code | |
3 | * Copyright (C) 2018 Network Device Education Foundation, Inc. ("NetDEF") | |
4 | * | |
5 | * FRR is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License as published by the | |
7 | * Free Software Foundation; either version 2, or (at your option) any | |
8 | * later version. | |
9 | * | |
10 | * FRR is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with FRR; see the file COPYING. If not, write to the Free | |
17 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
18 | * 02111-1307, USA. | |
19 | */ | |
20 | ||
21 | #include <zebra.h> | |
22 | ||
23 | #include "lib/libfrr.h" | |
24 | #include "lib/queue.h" | |
25 | #include "lib/stream.h" | |
26 | #include "lib/zclient.h" | |
27 | ||
28 | #include "lib/bfd.h" | |
29 | ||
30 | #include "bfd.h" | |
31 | ||
32 | /* | |
33 | * Data structures | |
34 | */ | |
35 | struct ptm_client_notification { | |
36 | struct bfd_session *pcn_bs; | |
37 | struct ptm_client *pcn_pc; | |
38 | ||
39 | TAILQ_ENTRY(ptm_client_notification) pcn_entry; | |
40 | }; | |
41 | TAILQ_HEAD(pcnqueue, ptm_client_notification); | |
42 | ||
43 | struct ptm_client { | |
44 | uint32_t pc_pid; | |
45 | struct pcnqueue pc_pcnqueue; | |
46 | ||
47 | TAILQ_ENTRY(ptm_client) pc_entry; | |
48 | }; | |
49 | TAILQ_HEAD(pcqueue, ptm_client); | |
50 | ||
51 | static struct pcqueue pcqueue; | |
52 | static struct zclient *zclient; | |
53 | ||
54 | ||
55 | /* | |
56 | * Prototypes | |
57 | */ | |
79b4a6fc | 58 | static int _ptm_msg_address(struct stream *msg, int family, const void *addr); |
d3af6147 RZ |
59 | |
60 | static void _ptm_msg_read_address(struct stream *msg, struct sockaddr_any *sa); | |
45b000d0 | 61 | static int _ptm_msg_read(struct stream *msg, int command, vrf_id_t vrf_id, |
d3af6147 RZ |
62 | struct bfd_peer_cfg *bpc, struct ptm_client **pc); |
63 | ||
64 | static struct ptm_client *pc_lookup(uint32_t pid); | |
65 | static struct ptm_client *pc_new(uint32_t pid); | |
a375de5c | 66 | static void pc_free(struct ptm_client *pc); |
788378fe | 67 | static void pc_free_all(void); |
d3af6147 RZ |
68 | static struct ptm_client_notification *pcn_new(struct ptm_client *pc, |
69 | struct bfd_session *bs); | |
70 | static struct ptm_client_notification *pcn_lookup(struct ptm_client *pc, | |
71 | struct bfd_session *bs); | |
72 | static void pcn_free(struct ptm_client_notification *pcn); | |
73 | ||
74 | ||
45b000d0 PG |
75 | static void bfdd_dest_register(struct stream *msg, vrf_id_t vrf_id); |
76 | static void bfdd_dest_deregister(struct stream *msg, vrf_id_t vrf_id); | |
d3af6147 | 77 | static void bfdd_client_register(struct stream *msg); |
a375de5c | 78 | static void bfdd_client_deregister(struct stream *msg); |
d3af6147 RZ |
79 | |
80 | /* | |
81 | * Functions | |
82 | */ | |
83 | #ifdef BFD_DEBUG | |
84 | static void debug_printbpc(const char *func, unsigned int line, | |
85 | struct bfd_peer_cfg *bpc); | |
86 | ||
87 | static void debug_printbpc(const char *func, unsigned int line, | |
88 | struct bfd_peer_cfg *bpc) | |
89 | { | |
90 | char addr[3][128]; | |
91 | char timers[3][128]; | |
9beff0bd | 92 | char cbit_str[10]; |
d3af6147 RZ |
93 | |
94 | addr[0][0] = addr[1][0] = addr[2][0] = timers[0][0] = timers[1][0] = | |
95 | timers[2][0] = 0; | |
96 | ||
97 | snprintf(addr[0], sizeof(addr[0]), "peer:%s", satostr(&bpc->bpc_peer)); | |
98 | if (bpc->bpc_local.sa_sin.sin_family) | |
99 | snprintf(addr[1], sizeof(addr[1]), " local:%s", | |
100 | satostr(&bpc->bpc_local)); | |
101 | ||
102 | if (bpc->bpc_has_localif) | |
103 | snprintf(addr[2], sizeof(addr[2]), " ifname:%s", | |
104 | bpc->bpc_localif); | |
105 | ||
106 | if (bpc->bpc_has_vrfname) | |
107 | snprintf(addr[2], sizeof(addr[2]), " vrf:%s", bpc->bpc_vrfname); | |
108 | ||
109 | if (bpc->bpc_has_recvinterval) | |
110 | snprintf(timers[0], sizeof(timers[0]), " rx:%lu", | |
111 | bpc->bpc_recvinterval); | |
112 | ||
113 | if (bpc->bpc_has_txinterval) | |
114 | snprintf(timers[1], sizeof(timers[1]), " tx:%lu", | |
115 | bpc->bpc_recvinterval); | |
116 | ||
117 | if (bpc->bpc_has_detectmultiplier) | |
118 | snprintf(timers[2], sizeof(timers[2]), " detect-multiplier:%d", | |
119 | bpc->bpc_detectmultiplier); | |
120 | ||
9beff0bd PG |
121 | sprintf(cbit_str, "CB %x", bpc->bpc_cbit); |
122 | ||
123 | log_debug("%s:%d: %s %s%s%s%s%s%s %s", func, line, | |
d3af6147 | 124 | bpc->bpc_mhop ? "multi-hop" : "single-hop", addr[0], addr[1], |
9beff0bd | 125 | addr[2], timers[0], timers[1], timers[2], cbit_str); |
d3af6147 RZ |
126 | } |
127 | ||
128 | #define DEBUG_PRINTBPC(bpc) debug_printbpc(__FILE__, __LINE__, (bpc)) | |
129 | #else | |
130 | #define DEBUG_PRINTBPC(bpc) | |
131 | #endif /* BFD_DEBUG */ | |
132 | ||
79b4a6fc | 133 | static int _ptm_msg_address(struct stream *msg, int family, const void *addr) |
d3af6147 | 134 | { |
79b4a6fc RZ |
135 | stream_putc(msg, family); |
136 | ||
137 | switch (family) { | |
d3af6147 | 138 | case AF_INET: |
79b4a6fc | 139 | stream_put(msg, addr, sizeof(struct in_addr)); |
d3af6147 RZ |
140 | stream_putc(msg, 32); |
141 | break; | |
142 | ||
143 | case AF_INET6: | |
79b4a6fc | 144 | stream_put(msg, addr, sizeof(struct in6_addr)); |
d3af6147 RZ |
145 | stream_putc(msg, 128); |
146 | break; | |
147 | ||
148 | default: | |
79b4a6fc RZ |
149 | assert(0); |
150 | break; | |
d3af6147 RZ |
151 | } |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
156 | int ptm_bfd_notify(struct bfd_session *bs) | |
157 | { | |
158 | struct stream *msg; | |
d3af6147 | 159 | |
0684c9b1 RZ |
160 | bs->stats.znotification++; |
161 | ||
d3af6147 RZ |
162 | /* |
163 | * Message format: | |
164 | * - header: command, vrf | |
165 | * - l: interface index | |
166 | * - c: family | |
167 | * - AF_INET: | |
168 | * - 4 bytes: ipv4 | |
169 | * - AF_INET6: | |
170 | * - 16 bytes: ipv6 | |
171 | * - c: prefix length | |
172 | * - l: bfd status | |
173 | * - c: family | |
174 | * - AF_INET: | |
175 | * - 4 bytes: ipv4 | |
176 | * - AF_INET6: | |
177 | * - 16 bytes: ipv6 | |
178 | * - c: prefix length | |
9beff0bd | 179 | * - c: cbit |
d3af6147 RZ |
180 | * |
181 | * Commands: ZEBRA_BFD_DEST_REPLAY | |
182 | * | |
183 | * q(64), l(32), w(16), c(8) | |
184 | */ | |
185 | msg = zclient->obuf; | |
186 | stream_reset(msg); | |
187 | ||
188 | /* TODO: VRF handling */ | |
45b000d0 PG |
189 | if (bs->vrf) |
190 | zclient_create_header(msg, ZEBRA_BFD_DEST_REPLAY, bs->vrf->vrf_id); | |
191 | else | |
192 | zclient_create_header(msg, ZEBRA_BFD_DEST_REPLAY, VRF_DEFAULT); | |
d3af6147 | 193 | |
971532e2 RZ |
194 | /* This header will be handled by `zebra_ptm.c`. */ |
195 | stream_putl(msg, ZEBRA_INTERFACE_BFD_DEST_UPDATE); | |
196 | ||
d3af6147 | 197 | /* NOTE: Interface is a shortcut to avoid comparing source address. */ |
80edb675 RZ |
198 | if (bs->ifp != NULL) |
199 | stream_putl(msg, bs->ifp->ifindex); | |
200 | else | |
201 | stream_putl(msg, IFINDEX_INTERNAL); | |
d3af6147 RZ |
202 | |
203 | /* BFD destination prefix information. */ | |
79b4a6fc | 204 | _ptm_msg_address(msg, bs->key.family, &bs->key.peer); |
d3af6147 RZ |
205 | |
206 | /* BFD status */ | |
207 | switch (bs->ses_state) { | |
208 | case PTM_BFD_UP: | |
209 | stream_putl(msg, BFD_STATUS_UP); | |
210 | break; | |
211 | ||
212 | case PTM_BFD_ADM_DOWN: | |
213 | case PTM_BFD_DOWN: | |
214 | case PTM_BFD_INIT: | |
215 | stream_putl(msg, BFD_STATUS_DOWN); | |
216 | break; | |
217 | ||
218 | default: | |
219 | stream_putl(msg, BFD_STATUS_UNKNOWN); | |
220 | break; | |
221 | } | |
222 | ||
223 | /* BFD source prefix information. */ | |
79b4a6fc | 224 | _ptm_msg_address(msg, bs->key.family, &bs->key.local); |
d3af6147 | 225 | |
9beff0bd PG |
226 | stream_putc(msg, bs->remote_cbit); |
227 | ||
d3af6147 RZ |
228 | /* Write packet size. */ |
229 | stream_putw_at(msg, 0, stream_get_endp(msg)); | |
230 | ||
231 | return zclient_send_message(zclient); | |
232 | } | |
233 | ||
234 | static void _ptm_msg_read_address(struct stream *msg, struct sockaddr_any *sa) | |
235 | { | |
236 | uint16_t family; | |
237 | ||
238 | STREAM_GETW(msg, family); | |
239 | ||
240 | switch (family) { | |
241 | case AF_INET: | |
242 | sa->sa_sin.sin_family = family; | |
243 | STREAM_GET(&sa->sa_sin.sin_addr, msg, | |
244 | sizeof(sa->sa_sin.sin_addr)); | |
245 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
246 | sa->sa_sin.sin_len = sizeof(sa->sa_sin); | |
247 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
248 | return; | |
249 | ||
250 | case AF_INET6: | |
251 | sa->sa_sin6.sin6_family = family; | |
252 | STREAM_GET(&sa->sa_sin6.sin6_addr, msg, | |
253 | sizeof(sa->sa_sin6.sin6_addr)); | |
254 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
255 | sa->sa_sin6.sin6_len = sizeof(sa->sa_sin6); | |
256 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
257 | return; | |
258 | ||
259 | default: | |
ae9f45a3 | 260 | log_warning("ptm-read-address: invalid family: %d", family); |
d3af6147 RZ |
261 | break; |
262 | } | |
263 | ||
264 | stream_failure: | |
265 | memset(sa, 0, sizeof(*sa)); | |
266 | } | |
267 | ||
45b000d0 | 268 | static int _ptm_msg_read(struct stream *msg, int command, vrf_id_t vrf_id, |
d3af6147 RZ |
269 | struct bfd_peer_cfg *bpc, struct ptm_client **pc) |
270 | { | |
271 | uint32_t pid; | |
f0d2be33 | 272 | uint8_t ttl __attribute__((unused)); |
ae9eebca | 273 | size_t ifnamelen; |
d3af6147 RZ |
274 | |
275 | /* | |
276 | * Register/Deregister/Update Message format: | |
277 | * - header: Command, VRF | |
278 | * - l: pid | |
279 | * - w: family | |
280 | * - AF_INET: | |
281 | * - l: destination ipv4 | |
282 | * - AF_INET6: | |
283 | * - 16 bytes: destination IPv6 | |
284 | * - command != ZEBRA_BFD_DEST_DEREGISTER | |
285 | * - l: min_rx | |
286 | * - l: min_tx | |
287 | * - c: detect multiplier | |
288 | * - c: is_multihop? | |
289 | * - multihop: | |
290 | * - w: family | |
291 | * - AF_INET: | |
292 | * - l: destination ipv4 | |
293 | * - AF_INET6: | |
294 | * - 16 bytes: destination IPv6 | |
295 | * - c: ttl | |
296 | * - no multihop | |
297 | * - AF_INET6: | |
298 | * - w: family | |
299 | * - 16 bytes: ipv6 address | |
300 | * - c: ifname length | |
301 | * - X bytes: interface name | |
9beff0bd | 302 | * - c: bfd_cbit |
d3af6147 RZ |
303 | * |
304 | * q(64), l(32), w(16), c(8) | |
305 | */ | |
306 | ||
307 | /* Initialize parameters return values. */ | |
308 | memset(bpc, 0, sizeof(*bpc)); | |
309 | *pc = NULL; | |
310 | ||
311 | /* Find or allocate process context data. */ | |
312 | STREAM_GETL(msg, pid); | |
313 | ||
314 | *pc = pc_new(pid); | |
315 | if (*pc == NULL) { | |
ae9f45a3 | 316 | log_debug("ptm-read: failed to allocate memory"); |
d3af6147 RZ |
317 | return -1; |
318 | } | |
319 | ||
320 | /* Register/update peer information. */ | |
321 | _ptm_msg_read_address(msg, &bpc->bpc_peer); | |
322 | ||
323 | /* Determine IP type from peer destination. */ | |
324 | bpc->bpc_ipv4 = (bpc->bpc_peer.sa_sin.sin_family == AF_INET); | |
325 | ||
326 | /* Get peer configuration. */ | |
327 | if (command != ZEBRA_BFD_DEST_DEREGISTER) { | |
328 | STREAM_GETL(msg, bpc->bpc_recvinterval); | |
329 | bpc->bpc_has_recvinterval = | |
330 | (bpc->bpc_recvinterval != BPC_DEF_RECEIVEINTERVAL); | |
331 | ||
332 | STREAM_GETL(msg, bpc->bpc_txinterval); | |
333 | bpc->bpc_has_txinterval = | |
334 | (bpc->bpc_txinterval != BPC_DEF_TRANSMITINTERVAL); | |
335 | ||
336 | STREAM_GETC(msg, bpc->bpc_detectmultiplier); | |
337 | bpc->bpc_has_detectmultiplier = | |
338 | (bpc->bpc_detectmultiplier != BPC_DEF_DETECTMULTIPLIER); | |
339 | } | |
340 | ||
341 | /* Read (single|multi)hop and its options. */ | |
342 | STREAM_GETC(msg, bpc->bpc_mhop); | |
343 | if (bpc->bpc_mhop) { | |
344 | /* Read multihop source address and TTL. */ | |
345 | _ptm_msg_read_address(msg, &bpc->bpc_local); | |
346 | STREAM_GETC(msg, ttl); | |
d3af6147 RZ |
347 | } else { |
348 | /* If target is IPv6, then we must obtain local address. */ | |
349 | if (bpc->bpc_ipv4 == false) | |
350 | _ptm_msg_read_address(msg, &bpc->bpc_local); | |
351 | ||
352 | /* | |
353 | * Read interface name and make sure it fits our data | |
354 | * structure, otherwise fail. | |
355 | */ | |
356 | STREAM_GETC(msg, ifnamelen); | |
ae9f45a3 RZ |
357 | if (ifnamelen >= sizeof(bpc->bpc_localif)) { |
358 | log_error("ptm-read: interface name is too big"); | |
d3af6147 RZ |
359 | return -1; |
360 | } | |
361 | ||
362 | bpc->bpc_has_localif = ifnamelen > 0; | |
363 | if (bpc->bpc_has_localif) { | |
364 | STREAM_GET(bpc->bpc_localif, msg, ifnamelen); | |
365 | bpc->bpc_localif[ifnamelen] = 0; | |
366 | } | |
367 | } | |
45b000d0 PG |
368 | if (vrf_id != VRF_DEFAULT) { |
369 | struct vrf *vrf; | |
370 | ||
371 | vrf = vrf_lookup_by_id(vrf_id); | |
372 | if (vrf) { | |
373 | bpc->bpc_has_vrfname = true; | |
374 | strlcpy(bpc->bpc_vrfname, vrf->name, sizeof(bpc->bpc_vrfname)); | |
375 | } else { | |
376 | log_error("ptm-read: vrf id %u could not be identified", vrf_id); | |
377 | return -1; | |
378 | } | |
379 | } | |
d3af6147 | 380 | |
9beff0bd PG |
381 | STREAM_GETC(msg, bpc->bpc_cbit); |
382 | ||
d3af6147 RZ |
383 | /* Sanity check: peer and local address must match IP types. */ |
384 | if (bpc->bpc_local.sa_sin.sin_family != 0 | |
385 | && (bpc->bpc_local.sa_sin.sin_family | |
386 | != bpc->bpc_peer.sa_sin.sin_family)) { | |
ae9f45a3 | 387 | log_warning("ptm-read: peer family doesn't match local type"); |
d3af6147 RZ |
388 | return -1; |
389 | } | |
390 | ||
391 | return 0; | |
392 | ||
393 | stream_failure: | |
394 | return -1; | |
395 | } | |
396 | ||
45b000d0 | 397 | static void bfdd_dest_register(struct stream *msg, vrf_id_t vrf_id) |
d3af6147 RZ |
398 | { |
399 | struct ptm_client *pc; | |
400 | struct ptm_client_notification *pcn; | |
401 | struct bfd_session *bs; | |
402 | struct bfd_peer_cfg bpc; | |
403 | ||
404 | /* Read the client context and peer data. */ | |
45b000d0 | 405 | if (_ptm_msg_read(msg, ZEBRA_BFD_DEST_REGISTER, vrf_id, &bpc, &pc) == -1) |
d3af6147 RZ |
406 | return; |
407 | ||
408 | DEBUG_PRINTBPC(&bpc); | |
409 | ||
410 | /* Find or start new BFD session. */ | |
411 | bs = bs_peer_find(&bpc); | |
412 | if (bs == NULL) { | |
413 | bs = ptm_bfd_sess_new(&bpc); | |
414 | if (bs == NULL) { | |
ae9f45a3 | 415 | log_debug("ptm-add-dest: failed to create BFD session"); |
d3af6147 RZ |
416 | return; |
417 | } | |
418 | } else { | |
419 | /* Don't try to change echo/shutdown state. */ | |
420 | bpc.bpc_echo = BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO); | |
421 | bpc.bpc_shutdown = | |
422 | BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN); | |
423 | } | |
424 | ||
425 | /* Create client peer notification register. */ | |
426 | pcn = pcn_new(pc, bs); | |
427 | if (pcn == NULL) { | |
ae9f45a3 | 428 | log_error("ptm-add-dest: failed to registrate notifications"); |
d3af6147 RZ |
429 | return; |
430 | } | |
431 | ||
432 | ptm_bfd_notify(bs); | |
433 | } | |
434 | ||
45b000d0 | 435 | static void bfdd_dest_deregister(struct stream *msg, vrf_id_t vrf_id) |
d3af6147 RZ |
436 | { |
437 | struct ptm_client *pc; | |
438 | struct ptm_client_notification *pcn; | |
439 | struct bfd_session *bs; | |
440 | struct bfd_peer_cfg bpc; | |
441 | ||
442 | /* Read the client context and peer data. */ | |
45b000d0 | 443 | if (_ptm_msg_read(msg, ZEBRA_BFD_DEST_DEREGISTER, vrf_id, &bpc, &pc) == -1) |
d3af6147 RZ |
444 | return; |
445 | ||
446 | DEBUG_PRINTBPC(&bpc); | |
447 | ||
448 | /* Find or start new BFD session. */ | |
449 | bs = bs_peer_find(&bpc); | |
450 | if (bs == NULL) { | |
ae9f45a3 | 451 | log_debug("ptm-del-dest: failed to find BFD session"); |
d3af6147 RZ |
452 | return; |
453 | } | |
454 | ||
455 | /* Unregister client peer notification. */ | |
456 | pcn = pcn_lookup(pc, bs); | |
457 | pcn_free(pcn); | |
4c741971 PG |
458 | if (bs->refcount || |
459 | BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_CONFIG)) | |
460 | return; | |
bc50bcc8 | 461 | ptm_bfd_sess_del(&bpc); |
d3af6147 RZ |
462 | } |
463 | ||
464 | /* | |
465 | * header: command, VRF | |
466 | * l: pid | |
467 | */ | |
468 | static void bfdd_client_register(struct stream *msg) | |
469 | { | |
470 | struct ptm_client *pc; | |
471 | uint32_t pid; | |
472 | ||
473 | /* Find or allocate process context data. */ | |
474 | STREAM_GETL(msg, pid); | |
475 | ||
476 | pc = pc_new(pid); | |
477 | if (pc == NULL) { | |
ae9f45a3 | 478 | log_error("ptm-add-client: failed to register client: %u", pid); |
d3af6147 RZ |
479 | return; |
480 | } | |
481 | ||
482 | return; | |
483 | ||
484 | stream_failure: | |
ae9f45a3 | 485 | log_error("ptm-add-client: failed to register client"); |
d3af6147 RZ |
486 | } |
487 | ||
a375de5c RZ |
488 | /* |
489 | * header: command, VRF | |
490 | * l: pid | |
491 | */ | |
492 | static void bfdd_client_deregister(struct stream *msg) | |
493 | { | |
494 | struct ptm_client *pc; | |
495 | uint32_t pid; | |
496 | ||
497 | /* Find or allocate process context data. */ | |
498 | STREAM_GETL(msg, pid); | |
499 | ||
500 | pc = pc_lookup(pid); | |
501 | if (pc == NULL) { | |
ae9f45a3 | 502 | log_debug("ptm-del-client: failed to find client: %u", pid); |
a375de5c RZ |
503 | return; |
504 | } | |
505 | ||
506 | pc_free(pc); | |
507 | ||
508 | return; | |
509 | ||
510 | stream_failure: | |
ae9f45a3 | 511 | log_error("ptm-del-client: failed to deregister client"); |
a375de5c RZ |
512 | } |
513 | ||
121f9dee | 514 | static int bfdd_replay(ZAPI_CALLBACK_ARGS) |
d3af6147 | 515 | { |
121f9dee | 516 | struct stream *msg = zclient->ibuf; |
d3af6147 RZ |
517 | uint32_t rcmd; |
518 | ||
519 | STREAM_GETL(msg, rcmd); | |
520 | ||
521 | switch (rcmd) { | |
522 | case ZEBRA_BFD_DEST_REGISTER: | |
523 | case ZEBRA_BFD_DEST_UPDATE: | |
45b000d0 | 524 | bfdd_dest_register(msg, vrf_id); |
d3af6147 RZ |
525 | break; |
526 | case ZEBRA_BFD_DEST_DEREGISTER: | |
45b000d0 | 527 | bfdd_dest_deregister(msg, vrf_id); |
d3af6147 RZ |
528 | break; |
529 | case ZEBRA_BFD_CLIENT_REGISTER: | |
530 | bfdd_client_register(msg); | |
531 | break; | |
a375de5c RZ |
532 | case ZEBRA_BFD_CLIENT_DEREGISTER: |
533 | bfdd_client_deregister(msg); | |
534 | break; | |
d3af6147 RZ |
535 | |
536 | default: | |
ae9f45a3 | 537 | log_debug("ptm-replay: invalid message type %u", rcmd); |
d3af6147 RZ |
538 | return -1; |
539 | } | |
540 | ||
541 | return 0; | |
542 | ||
543 | stream_failure: | |
ae9f45a3 | 544 | log_error("ptm-replay: failed to find command"); |
d3af6147 RZ |
545 | return -1; |
546 | } | |
547 | ||
971532e2 RZ |
548 | static void bfdd_zebra_connected(struct zclient *zc) |
549 | { | |
550 | struct stream *msg = zc->obuf; | |
551 | ||
788378fe RZ |
552 | /* Clean-up and free ptm clients data memory. */ |
553 | pc_free_all(); | |
554 | ||
971532e2 RZ |
555 | /* |
556 | * The replay is an empty message just to trigger client daemons | |
557 | * configuration replay. | |
558 | */ | |
559 | stream_reset(msg); | |
560 | zclient_create_header(msg, ZEBRA_BFD_DEST_REPLAY, VRF_DEFAULT); | |
561 | stream_putl(msg, ZEBRA_BFD_DEST_REPLAY); | |
562 | stream_putw_at(msg, 0, stream_get_endp(msg)); | |
563 | ||
80edb675 RZ |
564 | /* Ask for interfaces information. */ |
565 | zclient_create_header(msg, ZEBRA_INTERFACE_ADD, VRF_DEFAULT); | |
566 | ||
567 | /* Send requests. */ | |
971532e2 RZ |
568 | zclient_send_message(zclient); |
569 | } | |
570 | ||
d245e522 RZ |
571 | static void bfdd_sessions_enable_interface(struct interface *ifp) |
572 | { | |
573 | struct bfd_session_observer *bso; | |
574 | struct bfd_session *bs; | |
a41c4e1b PG |
575 | struct vrf *vrf = ifp->vrf; |
576 | ||
577 | if (!vrf) | |
578 | return; | |
d245e522 RZ |
579 | |
580 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
b4335515 | 581 | bs = bso->bso_bs; |
d245e522 RZ |
582 | if (bso->bso_isinterface == false) |
583 | continue; | |
d245e522 | 584 | /* Interface name mismatch. */ |
79b4a6fc | 585 | if (strcmp(ifp->name, bs->key.ifname)) |
d245e522 | 586 | continue; |
b4335515 PG |
587 | if (bs->key.vrfname[0] && |
588 | strcmp(vrf->name, bs->key.vrfname)) | |
589 | continue; | |
d245e522 RZ |
590 | /* Skip enabled sessions. */ |
591 | if (bs->sock != -1) | |
592 | continue; | |
593 | ||
594 | /* Try to enable it. */ | |
595 | bfd_session_enable(bs); | |
596 | } | |
597 | } | |
598 | ||
599 | static void bfdd_sessions_disable_interface(struct interface *ifp) | |
600 | { | |
601 | struct bfd_session_observer *bso; | |
602 | struct bfd_session *bs; | |
603 | ||
604 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
605 | if (bso->bso_isinterface == false) | |
606 | continue; | |
607 | ||
608 | /* Interface name mismatch. */ | |
609 | bs = bso->bso_bs; | |
79b4a6fc | 610 | if (strcmp(ifp->name, bs->key.ifname)) |
d245e522 RZ |
611 | continue; |
612 | /* Skip disabled sessions. */ | |
613 | if (bs->sock == -1) | |
614 | continue; | |
615 | ||
616 | /* Try to enable it. */ | |
617 | bfd_session_disable(bs); | |
618 | ||
d245e522 RZ |
619 | } |
620 | } | |
621 | ||
d24af713 PG |
622 | void bfdd_sessions_enable_vrf(struct vrf *vrf) |
623 | { | |
624 | struct bfd_session_observer *bso; | |
625 | struct bfd_session *bs; | |
626 | ||
627 | /* it may affect configs without interfaces */ | |
628 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
629 | bs = bso->bso_bs; | |
630 | if (bs->vrf) | |
631 | continue; | |
632 | if (bs->key.vrfname[0] && | |
633 | strcmp(vrf->name, bs->key.vrfname)) | |
634 | continue; | |
635 | /* need to update the vrf information on | |
636 | * bs so that callbacks are handled | |
637 | */ | |
638 | bs->vrf = vrf; | |
639 | /* Skip enabled sessions. */ | |
640 | if (bs->sock != -1) | |
641 | continue; | |
642 | /* Try to enable it. */ | |
643 | bfd_session_enable(bs); | |
644 | } | |
645 | } | |
646 | ||
647 | void bfdd_sessions_disable_vrf(struct vrf *vrf) | |
648 | { | |
649 | struct bfd_session_observer *bso; | |
650 | struct bfd_session *bs; | |
651 | ||
652 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
653 | if (bso->bso_isinterface) | |
654 | continue; | |
655 | bs = bso->bso_bs; | |
656 | if (bs->key.vrfname[0] && | |
657 | strcmp(vrf->name, bs->key.vrfname)) | |
658 | continue; | |
659 | /* Skip disabled sessions. */ | |
660 | if (bs->sock == -1) | |
661 | continue; | |
662 | ||
663 | /* Try to enable it. */ | |
664 | bfd_session_disable(bs); | |
665 | } | |
666 | } | |
667 | ||
121f9dee | 668 | static int bfdd_interface_update(ZAPI_CALLBACK_ARGS) |
80edb675 | 669 | { |
d245e522 RZ |
670 | struct interface *ifp; |
671 | ||
80edb675 RZ |
672 | /* |
673 | * `zebra_interface_add_read` will handle the interface creation | |
674 | * on `lib/if.c`. We'll use that data structure instead of | |
675 | * rolling our own. | |
676 | */ | |
677 | if (cmd == ZEBRA_INTERFACE_ADD) { | |
121f9dee | 678 | ifp = zebra_interface_add_read(zclient->ibuf, vrf_id); |
d245e522 RZ |
679 | if (ifp == NULL) |
680 | return 0; | |
681 | ||
682 | bfdd_sessions_enable_interface(ifp); | |
80edb675 RZ |
683 | return 0; |
684 | } | |
685 | ||
686 | /* Update interface information. */ | |
121f9dee | 687 | ifp = zebra_interface_state_read(zclient->ibuf, vrf_id); |
d245e522 RZ |
688 | if (ifp == NULL) |
689 | return 0; | |
80edb675 | 690 | |
d245e522 | 691 | bfdd_sessions_disable_interface(ifp); |
80edb675 | 692 | |
9d6c33ea DS |
693 | if_set_index(ifp, IFINDEX_INTERNAL); |
694 | ||
80edb675 RZ |
695 | return 0; |
696 | } | |
697 | ||
121f9dee | 698 | static int bfdd_interface_vrf_update(ZAPI_CALLBACK_ARGS) |
b333abc2 RZ |
699 | { |
700 | struct interface *ifp; | |
da85f5e0 | 701 | struct vrf *nvrf; |
b333abc2 RZ |
702 | vrf_id_t nvrfid; |
703 | ||
121f9dee | 704 | ifp = zebra_interface_vrf_update_read(zclient->ibuf, vrf_id, &nvrfid); |
b333abc2 RZ |
705 | if (ifp == NULL) |
706 | return 0; | |
da85f5e0 PG |
707 | nvrf = vrf_lookup_by_id(nvrfid); |
708 | if_update_to_new_vrf(ifp, nvrf); | |
b333abc2 RZ |
709 | |
710 | return 0; | |
711 | } | |
712 | ||
261e0ba9 RZ |
713 | static void bfdd_sessions_enable_address(struct connected *ifc) |
714 | { | |
715 | struct bfd_session_observer *bso; | |
716 | struct bfd_session *bs; | |
717 | struct prefix prefix; | |
718 | ||
719 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
720 | if (bso->bso_isaddress == false) | |
721 | continue; | |
722 | ||
723 | /* Skip enabled sessions. */ | |
724 | bs = bso->bso_bs; | |
725 | if (bs->sock != -1) | |
726 | continue; | |
727 | ||
728 | /* Check address. */ | |
729 | prefix = bso->bso_addr; | |
730 | prefix.prefixlen = ifc->address->prefixlen; | |
731 | if (prefix_cmp(&prefix, ifc->address)) | |
732 | continue; | |
733 | ||
734 | /* Try to enable it. */ | |
735 | bfd_session_enable(bs); | |
736 | } | |
737 | } | |
738 | ||
121f9dee | 739 | static int bfdd_interface_address_update(ZAPI_CALLBACK_ARGS) |
261e0ba9 RZ |
740 | { |
741 | struct connected *ifc; | |
742 | ||
121f9dee | 743 | ifc = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id); |
261e0ba9 RZ |
744 | if (ifc == NULL) |
745 | return 0; | |
746 | ||
747 | bfdd_sessions_enable_address(ifc); | |
748 | ||
749 | return 0; | |
750 | } | |
751 | ||
d3af6147 RZ |
752 | void bfdd_zclient_init(struct zebra_privs_t *bfdd_priv) |
753 | { | |
26f63a1e | 754 | zclient = zclient_new(master, &zclient_options_default); |
d3af6147 RZ |
755 | assert(zclient != NULL); |
756 | zclient_init(zclient, ZEBRA_ROUTE_BFD, 0, bfdd_priv); | |
757 | ||
758 | /* | |
759 | * We'll receive all messages through replay, however it will | |
760 | * contain a special field with the real command inside so we | |
761 | * avoid having to create too many handlers. | |
762 | */ | |
763 | zclient->bfd_dest_replay = bfdd_replay; | |
971532e2 RZ |
764 | |
765 | /* Send replay request on zebra connect. */ | |
766 | zclient->zebra_connected = bfdd_zebra_connected; | |
80edb675 RZ |
767 | |
768 | /* Learn interfaces from zebra instead of the OS. */ | |
769 | zclient->interface_add = bfdd_interface_update; | |
770 | zclient->interface_delete = bfdd_interface_update; | |
b333abc2 RZ |
771 | |
772 | /* Learn about interface VRF. */ | |
773 | zclient->interface_vrf_update = bfdd_interface_vrf_update; | |
261e0ba9 RZ |
774 | |
775 | /* Learn about new addresses being registered. */ | |
776 | zclient->interface_address_add = bfdd_interface_address_update; | |
777 | zclient->interface_address_delete = bfdd_interface_address_update; | |
d3af6147 RZ |
778 | } |
779 | ||
54aadda1 PG |
780 | void bfdd_zclient_register(vrf_id_t vrf_id) |
781 | { | |
782 | if (!zclient || zclient->sock < 0) | |
783 | return; | |
784 | zclient_send_reg_requests(zclient, vrf_id); | |
785 | } | |
786 | ||
787 | void bfdd_zclient_unregister(vrf_id_t vrf_id) | |
788 | { | |
789 | if (!zclient || zclient->sock < 0) | |
790 | return; | |
791 | zclient_send_dereg_requests(zclient, vrf_id); | |
792 | } | |
793 | ||
d3af6147 RZ |
794 | void bfdd_zclient_stop(void) |
795 | { | |
796 | zclient_stop(zclient); | |
788378fe RZ |
797 | |
798 | /* Clean-up and free ptm clients data memory. */ | |
799 | pc_free_all(); | |
d3af6147 RZ |
800 | } |
801 | ||
802 | ||
803 | /* | |
804 | * Client handling. | |
805 | */ | |
806 | static struct ptm_client *pc_lookup(uint32_t pid) | |
807 | { | |
808 | struct ptm_client *pc; | |
809 | ||
810 | TAILQ_FOREACH (pc, &pcqueue, pc_entry) { | |
811 | if (pc->pc_pid != pid) | |
812 | continue; | |
813 | ||
814 | break; | |
815 | } | |
816 | ||
817 | return pc; | |
818 | } | |
819 | ||
820 | static struct ptm_client *pc_new(uint32_t pid) | |
821 | { | |
822 | struct ptm_client *pc; | |
823 | ||
824 | /* Look up first, if not found create the client. */ | |
825 | pc = pc_lookup(pid); | |
826 | if (pc != NULL) | |
827 | return pc; | |
828 | ||
829 | /* Allocate the client data and save it. */ | |
830 | pc = XCALLOC(MTYPE_BFDD_CONTROL, sizeof(*pc)); | |
d3af6147 RZ |
831 | |
832 | pc->pc_pid = pid; | |
833 | TAILQ_INSERT_HEAD(&pcqueue, pc, pc_entry); | |
834 | return pc; | |
835 | } | |
836 | ||
a375de5c RZ |
837 | static void pc_free(struct ptm_client *pc) |
838 | { | |
839 | struct ptm_client_notification *pcn; | |
840 | ||
841 | if (pc == NULL) | |
842 | return; | |
843 | ||
844 | TAILQ_REMOVE(&pcqueue, pc, pc_entry); | |
845 | ||
846 | while (!TAILQ_EMPTY(&pc->pc_pcnqueue)) { | |
847 | pcn = TAILQ_FIRST(&pc->pc_pcnqueue); | |
848 | pcn_free(pcn); | |
849 | } | |
850 | ||
851 | XFREE(MTYPE_BFDD_CONTROL, pc); | |
852 | } | |
853 | ||
788378fe RZ |
854 | static void pc_free_all(void) |
855 | { | |
856 | struct ptm_client *pc; | |
857 | ||
858 | while (!TAILQ_EMPTY(&pcqueue)) { | |
859 | pc = TAILQ_FIRST(&pcqueue); | |
860 | pc_free(pc); | |
861 | } | |
862 | } | |
863 | ||
d3af6147 RZ |
864 | static struct ptm_client_notification *pcn_new(struct ptm_client *pc, |
865 | struct bfd_session *bs) | |
866 | { | |
867 | struct ptm_client_notification *pcn; | |
868 | ||
869 | /* Try to find an existing pcn fist. */ | |
870 | pcn = pcn_lookup(pc, bs); | |
871 | if (pcn != NULL) | |
872 | return pcn; | |
873 | ||
874 | /* Save the client notification data. */ | |
875 | pcn = XCALLOC(MTYPE_BFDD_NOTIFICATION, sizeof(*pcn)); | |
d3af6147 RZ |
876 | |
877 | TAILQ_INSERT_HEAD(&pc->pc_pcnqueue, pcn, pcn_entry); | |
878 | pcn->pcn_pc = pc; | |
879 | pcn->pcn_bs = bs; | |
880 | bs->refcount++; | |
881 | ||
882 | return pcn; | |
883 | } | |
884 | ||
885 | static struct ptm_client_notification *pcn_lookup(struct ptm_client *pc, | |
886 | struct bfd_session *bs) | |
887 | { | |
888 | struct ptm_client_notification *pcn; | |
889 | ||
890 | TAILQ_FOREACH (pcn, &pc->pc_pcnqueue, pcn_entry) { | |
891 | if (pcn->pcn_bs != bs) | |
892 | continue; | |
893 | ||
894 | break; | |
895 | } | |
896 | ||
897 | return pcn; | |
898 | } | |
899 | ||
900 | static void pcn_free(struct ptm_client_notification *pcn) | |
901 | { | |
902 | struct ptm_client *pc; | |
903 | struct bfd_session *bs; | |
904 | ||
905 | if (pcn == NULL) | |
906 | return; | |
907 | ||
908 | /* Handle session de-registration. */ | |
909 | bs = pcn->pcn_bs; | |
910 | pcn->pcn_bs = NULL; | |
911 | bs->refcount--; | |
912 | ||
913 | /* Handle ptm_client deregistration. */ | |
914 | pc = pcn->pcn_pc; | |
915 | pcn->pcn_pc = NULL; | |
916 | TAILQ_REMOVE(&pc->pc_pcnqueue, pcn, pcn_entry); | |
917 | ||
918 | XFREE(MTYPE_BFDD_NOTIFICATION, pcn); | |
919 | } |