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Commit | Line | Data |
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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 | ||
259b64eb RZ |
123 | zlog_debug("%s:%d: %s %s%s%s%s%s%s %s", func, line, |
124 | bpc->bpc_mhop ? "multi-hop" : "single-hop", addr[0], addr[1], | |
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 | ||
7555dc61 | 156 | int ptm_bfd_notify(struct bfd_session *bs, uint8_t notify_state) |
d3af6147 RZ |
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 */ | |
7555dc61 | 207 | switch (notify_state) { |
d3af6147 RZ |
208 | case PTM_BFD_UP: |
209 | stream_putl(msg, BFD_STATUS_UP); | |
210 | break; | |
211 | ||
212 | case PTM_BFD_ADM_DOWN: | |
7555dc61 S |
213 | stream_putl(msg, BFD_STATUS_ADMIN_DOWN); |
214 | break; | |
215 | ||
d3af6147 RZ |
216 | case PTM_BFD_DOWN: |
217 | case PTM_BFD_INIT: | |
218 | stream_putl(msg, BFD_STATUS_DOWN); | |
219 | break; | |
220 | ||
221 | default: | |
222 | stream_putl(msg, BFD_STATUS_UNKNOWN); | |
223 | break; | |
224 | } | |
225 | ||
226 | /* BFD source prefix information. */ | |
79b4a6fc | 227 | _ptm_msg_address(msg, bs->key.family, &bs->key.local); |
d3af6147 | 228 | |
9beff0bd PG |
229 | stream_putc(msg, bs->remote_cbit); |
230 | ||
d3af6147 RZ |
231 | /* Write packet size. */ |
232 | stream_putw_at(msg, 0, stream_get_endp(msg)); | |
233 | ||
234 | return zclient_send_message(zclient); | |
235 | } | |
236 | ||
237 | static void _ptm_msg_read_address(struct stream *msg, struct sockaddr_any *sa) | |
238 | { | |
239 | uint16_t family; | |
240 | ||
241 | STREAM_GETW(msg, family); | |
242 | ||
243 | switch (family) { | |
244 | case AF_INET: | |
245 | sa->sa_sin.sin_family = family; | |
246 | STREAM_GET(&sa->sa_sin.sin_addr, msg, | |
247 | sizeof(sa->sa_sin.sin_addr)); | |
248 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
249 | sa->sa_sin.sin_len = sizeof(sa->sa_sin); | |
250 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
251 | return; | |
252 | ||
253 | case AF_INET6: | |
254 | sa->sa_sin6.sin6_family = family; | |
255 | STREAM_GET(&sa->sa_sin6.sin6_addr, msg, | |
256 | sizeof(sa->sa_sin6.sin6_addr)); | |
257 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
258 | sa->sa_sin6.sin6_len = sizeof(sa->sa_sin6); | |
259 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
260 | return; | |
261 | ||
262 | default: | |
259b64eb | 263 | zlog_warn("ptm-read-address: invalid family: %d", family); |
d3af6147 RZ |
264 | break; |
265 | } | |
266 | ||
267 | stream_failure: | |
268 | memset(sa, 0, sizeof(*sa)); | |
269 | } | |
270 | ||
45b000d0 | 271 | static int _ptm_msg_read(struct stream *msg, int command, vrf_id_t vrf_id, |
d3af6147 RZ |
272 | struct bfd_peer_cfg *bpc, struct ptm_client **pc) |
273 | { | |
274 | uint32_t pid; | |
f0d2be33 | 275 | uint8_t ttl __attribute__((unused)); |
ae9eebca | 276 | size_t ifnamelen; |
d3af6147 RZ |
277 | |
278 | /* | |
279 | * Register/Deregister/Update Message format: | |
280 | * - header: Command, VRF | |
281 | * - l: pid | |
282 | * - w: family | |
283 | * - AF_INET: | |
284 | * - l: destination ipv4 | |
285 | * - AF_INET6: | |
286 | * - 16 bytes: destination IPv6 | |
287 | * - command != ZEBRA_BFD_DEST_DEREGISTER | |
288 | * - l: min_rx | |
289 | * - l: min_tx | |
290 | * - c: detect multiplier | |
291 | * - c: is_multihop? | |
292 | * - multihop: | |
293 | * - w: family | |
294 | * - AF_INET: | |
295 | * - l: destination ipv4 | |
296 | * - AF_INET6: | |
297 | * - 16 bytes: destination IPv6 | |
298 | * - c: ttl | |
299 | * - no multihop | |
300 | * - AF_INET6: | |
301 | * - w: family | |
302 | * - 16 bytes: ipv6 address | |
303 | * - c: ifname length | |
304 | * - X bytes: interface name | |
9beff0bd | 305 | * - c: bfd_cbit |
d3af6147 RZ |
306 | * |
307 | * q(64), l(32), w(16), c(8) | |
308 | */ | |
309 | ||
310 | /* Initialize parameters return values. */ | |
311 | memset(bpc, 0, sizeof(*bpc)); | |
312 | *pc = NULL; | |
313 | ||
314 | /* Find or allocate process context data. */ | |
315 | STREAM_GETL(msg, pid); | |
316 | ||
317 | *pc = pc_new(pid); | |
d3af6147 RZ |
318 | |
319 | /* Register/update peer information. */ | |
320 | _ptm_msg_read_address(msg, &bpc->bpc_peer); | |
321 | ||
322 | /* Determine IP type from peer destination. */ | |
323 | bpc->bpc_ipv4 = (bpc->bpc_peer.sa_sin.sin_family == AF_INET); | |
324 | ||
325 | /* Get peer configuration. */ | |
326 | if (command != ZEBRA_BFD_DEST_DEREGISTER) { | |
327 | STREAM_GETL(msg, bpc->bpc_recvinterval); | |
328 | bpc->bpc_has_recvinterval = | |
329 | (bpc->bpc_recvinterval != BPC_DEF_RECEIVEINTERVAL); | |
330 | ||
331 | STREAM_GETL(msg, bpc->bpc_txinterval); | |
332 | bpc->bpc_has_txinterval = | |
333 | (bpc->bpc_txinterval != BPC_DEF_TRANSMITINTERVAL); | |
334 | ||
335 | STREAM_GETC(msg, bpc->bpc_detectmultiplier); | |
336 | bpc->bpc_has_detectmultiplier = | |
337 | (bpc->bpc_detectmultiplier != BPC_DEF_DETECTMULTIPLIER); | |
338 | } | |
339 | ||
340 | /* Read (single|multi)hop and its options. */ | |
341 | STREAM_GETC(msg, bpc->bpc_mhop); | |
342 | if (bpc->bpc_mhop) { | |
343 | /* Read multihop source address and TTL. */ | |
344 | _ptm_msg_read_address(msg, &bpc->bpc_local); | |
345 | STREAM_GETC(msg, ttl); | |
d3af6147 RZ |
346 | } else { |
347 | /* If target is IPv6, then we must obtain local address. */ | |
348 | if (bpc->bpc_ipv4 == false) | |
349 | _ptm_msg_read_address(msg, &bpc->bpc_local); | |
350 | ||
351 | /* | |
352 | * Read interface name and make sure it fits our data | |
353 | * structure, otherwise fail. | |
354 | */ | |
355 | STREAM_GETC(msg, ifnamelen); | |
ae9f45a3 | 356 | if (ifnamelen >= sizeof(bpc->bpc_localif)) { |
259b64eb | 357 | zlog_err("ptm-read: interface name is too big"); |
d3af6147 RZ |
358 | return -1; |
359 | } | |
360 | ||
361 | bpc->bpc_has_localif = ifnamelen > 0; | |
362 | if (bpc->bpc_has_localif) { | |
363 | STREAM_GET(bpc->bpc_localif, msg, ifnamelen); | |
364 | bpc->bpc_localif[ifnamelen] = 0; | |
365 | } | |
366 | } | |
45b000d0 PG |
367 | if (vrf_id != VRF_DEFAULT) { |
368 | struct vrf *vrf; | |
369 | ||
370 | vrf = vrf_lookup_by_id(vrf_id); | |
371 | if (vrf) { | |
372 | bpc->bpc_has_vrfname = true; | |
373 | strlcpy(bpc->bpc_vrfname, vrf->name, sizeof(bpc->bpc_vrfname)); | |
374 | } else { | |
259b64eb RZ |
375 | zlog_err("ptm-read: vrf id %u could not be identified", |
376 | vrf_id); | |
45b000d0 PG |
377 | return -1; |
378 | } | |
3a20889f PG |
379 | } else { |
380 | bpc->bpc_has_vrfname = true; | |
381 | strlcpy(bpc->bpc_vrfname, VRF_DEFAULT_NAME, sizeof(bpc->bpc_vrfname)); | |
45b000d0 | 382 | } |
d3af6147 | 383 | |
9beff0bd PG |
384 | STREAM_GETC(msg, bpc->bpc_cbit); |
385 | ||
d3af6147 RZ |
386 | /* Sanity check: peer and local address must match IP types. */ |
387 | if (bpc->bpc_local.sa_sin.sin_family != 0 | |
388 | && (bpc->bpc_local.sa_sin.sin_family | |
389 | != bpc->bpc_peer.sa_sin.sin_family)) { | |
259b64eb | 390 | zlog_warn("ptm-read: peer family doesn't match local type"); |
d3af6147 RZ |
391 | return -1; |
392 | } | |
393 | ||
394 | return 0; | |
395 | ||
396 | stream_failure: | |
397 | return -1; | |
398 | } | |
399 | ||
45b000d0 | 400 | static void bfdd_dest_register(struct stream *msg, vrf_id_t vrf_id) |
d3af6147 RZ |
401 | { |
402 | struct ptm_client *pc; | |
d3af6147 RZ |
403 | struct bfd_session *bs; |
404 | struct bfd_peer_cfg bpc; | |
405 | ||
406 | /* Read the client context and peer data. */ | |
45b000d0 | 407 | if (_ptm_msg_read(msg, ZEBRA_BFD_DEST_REGISTER, vrf_id, &bpc, &pc) == -1) |
d3af6147 RZ |
408 | return; |
409 | ||
410 | DEBUG_PRINTBPC(&bpc); | |
411 | ||
412 | /* Find or start new BFD session. */ | |
413 | bs = bs_peer_find(&bpc); | |
414 | if (bs == NULL) { | |
415 | bs = ptm_bfd_sess_new(&bpc); | |
416 | if (bs == NULL) { | |
48da2c31 RZ |
417 | if (bglobal.debug_zebra) |
418 | zlog_debug( | |
419 | "ptm-add-dest: failed to create BFD session"); | |
d3af6147 RZ |
420 | return; |
421 | } | |
422 | } else { | |
423 | /* Don't try to change echo/shutdown state. */ | |
b88113ef | 424 | bpc.bpc_echo = CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO); |
d3af6147 | 425 | bpc.bpc_shutdown = |
b88113ef | 426 | CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN); |
d3af6147 RZ |
427 | } |
428 | ||
429 | /* Create client peer notification register. */ | |
08de92af | 430 | pcn_new(pc, bs); |
d3af6147 | 431 | |
7555dc61 | 432 | ptm_bfd_notify(bs, bs->ses_state); |
d3af6147 RZ |
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) { | |
48da2c31 RZ |
451 | if (bglobal.debug_zebra) |
452 | zlog_debug("ptm-del-dest: failed to find BFD session"); | |
d3af6147 RZ |
453 | return; |
454 | } | |
455 | ||
456 | /* Unregister client peer notification. */ | |
457 | pcn = pcn_lookup(pc, bs); | |
458 | pcn_free(pcn); | |
4c741971 | 459 | if (bs->refcount || |
b88113ef | 460 | CHECK_FLAG(bs->flags, BFD_SESS_FLAG_CONFIG)) |
4c741971 | 461 | return; |
7555dc61 S |
462 | |
463 | bs->ses_state = PTM_BFD_ADM_DOWN; | |
464 | ptm_bfd_snd(bs, 0); | |
465 | ||
bc50bcc8 | 466 | ptm_bfd_sess_del(&bpc); |
d3af6147 RZ |
467 | } |
468 | ||
469 | /* | |
470 | * header: command, VRF | |
471 | * l: pid | |
472 | */ | |
473 | static void bfdd_client_register(struct stream *msg) | |
474 | { | |
d3af6147 RZ |
475 | uint32_t pid; |
476 | ||
477 | /* Find or allocate process context data. */ | |
478 | STREAM_GETL(msg, pid); | |
479 | ||
08de92af | 480 | pc_new(pid); |
d3af6147 RZ |
481 | |
482 | return; | |
483 | ||
484 | stream_failure: | |
259b64eb | 485 | zlog_err("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) { | |
48da2c31 RZ |
502 | if (bglobal.debug_zebra) |
503 | zlog_debug("ptm-del-client: failed to find client: %u", | |
504 | pid); | |
a375de5c RZ |
505 | return; |
506 | } | |
507 | ||
508 | pc_free(pc); | |
509 | ||
510 | return; | |
511 | ||
512 | stream_failure: | |
259b64eb | 513 | zlog_err("ptm-del-client: failed to deregister client"); |
a375de5c RZ |
514 | } |
515 | ||
121f9dee | 516 | static int bfdd_replay(ZAPI_CALLBACK_ARGS) |
d3af6147 | 517 | { |
121f9dee | 518 | struct stream *msg = zclient->ibuf; |
d3af6147 RZ |
519 | uint32_t rcmd; |
520 | ||
521 | STREAM_GETL(msg, rcmd); | |
522 | ||
523 | switch (rcmd) { | |
524 | case ZEBRA_BFD_DEST_REGISTER: | |
525 | case ZEBRA_BFD_DEST_UPDATE: | |
45b000d0 | 526 | bfdd_dest_register(msg, vrf_id); |
d3af6147 RZ |
527 | break; |
528 | case ZEBRA_BFD_DEST_DEREGISTER: | |
45b000d0 | 529 | bfdd_dest_deregister(msg, vrf_id); |
d3af6147 RZ |
530 | break; |
531 | case ZEBRA_BFD_CLIENT_REGISTER: | |
532 | bfdd_client_register(msg); | |
533 | break; | |
a375de5c RZ |
534 | case ZEBRA_BFD_CLIENT_DEREGISTER: |
535 | bfdd_client_deregister(msg); | |
536 | break; | |
d3af6147 RZ |
537 | |
538 | default: | |
48da2c31 RZ |
539 | if (bglobal.debug_zebra) |
540 | zlog_debug("ptm-replay: invalid message type %u", rcmd); | |
d3af6147 RZ |
541 | return -1; |
542 | } | |
543 | ||
544 | return 0; | |
545 | ||
546 | stream_failure: | |
259b64eb | 547 | zlog_err("ptm-replay: failed to find command"); |
d3af6147 RZ |
548 | return -1; |
549 | } | |
550 | ||
971532e2 RZ |
551 | static void bfdd_zebra_connected(struct zclient *zc) |
552 | { | |
553 | struct stream *msg = zc->obuf; | |
554 | ||
788378fe RZ |
555 | /* Clean-up and free ptm clients data memory. */ |
556 | pc_free_all(); | |
557 | ||
971532e2 RZ |
558 | /* |
559 | * The replay is an empty message just to trigger client daemons | |
560 | * configuration replay. | |
561 | */ | |
562 | stream_reset(msg); | |
563 | zclient_create_header(msg, ZEBRA_BFD_DEST_REPLAY, VRF_DEFAULT); | |
564 | stream_putl(msg, ZEBRA_BFD_DEST_REPLAY); | |
565 | stream_putw_at(msg, 0, stream_get_endp(msg)); | |
566 | ||
80edb675 RZ |
567 | /* Ask for interfaces information. */ |
568 | zclient_create_header(msg, ZEBRA_INTERFACE_ADD, VRF_DEFAULT); | |
569 | ||
570 | /* Send requests. */ | |
971532e2 RZ |
571 | zclient_send_message(zclient); |
572 | } | |
573 | ||
d245e522 RZ |
574 | static void bfdd_sessions_enable_interface(struct interface *ifp) |
575 | { | |
576 | struct bfd_session_observer *bso; | |
577 | struct bfd_session *bs; | |
a36898e7 | 578 | struct vrf *vrf; |
d245e522 RZ |
579 | |
580 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
b4335515 | 581 | bs = bso->bso_bs; |
d245e522 | 582 | /* Interface name mismatch. */ |
79b4a6fc | 583 | if (strcmp(ifp->name, bs->key.ifname)) |
d245e522 | 584 | continue; |
a36898e7 DS |
585 | vrf = vrf_lookup_by_id(ifp->vrf_id); |
586 | if (!vrf) | |
587 | continue; | |
b4335515 PG |
588 | if (bs->key.vrfname[0] && |
589 | strcmp(vrf->name, bs->key.vrfname)) | |
590 | continue; | |
d245e522 RZ |
591 | /* Skip enabled sessions. */ |
592 | if (bs->sock != -1) | |
593 | continue; | |
594 | ||
595 | /* Try to enable it. */ | |
596 | bfd_session_enable(bs); | |
597 | } | |
598 | } | |
599 | ||
600 | static void bfdd_sessions_disable_interface(struct interface *ifp) | |
601 | { | |
602 | struct bfd_session_observer *bso; | |
603 | struct bfd_session *bs; | |
604 | ||
605 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
d245e522 | 606 | bs = bso->bso_bs; |
79b4a6fc | 607 | if (strcmp(ifp->name, bs->key.ifname)) |
d245e522 RZ |
608 | continue; |
609 | /* Skip disabled sessions. */ | |
610 | if (bs->sock == -1) | |
611 | continue; | |
612 | ||
d245e522 RZ |
613 | bfd_session_disable(bs); |
614 | ||
d245e522 RZ |
615 | } |
616 | } | |
617 | ||
d24af713 PG |
618 | void bfdd_sessions_enable_vrf(struct vrf *vrf) |
619 | { | |
620 | struct bfd_session_observer *bso; | |
621 | struct bfd_session *bs; | |
622 | ||
623 | /* it may affect configs without interfaces */ | |
624 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
625 | bs = bso->bso_bs; | |
f06e248c PG |
626 | /* update name */ |
627 | if (bs->vrf && bs->vrf == vrf) { | |
628 | if (!strmatch(bs->key.vrfname, vrf->name)) | |
629 | bfd_session_update_vrf_name(bs, vrf); | |
630 | } | |
d24af713 PG |
631 | if (bs->vrf) |
632 | continue; | |
633 | if (bs->key.vrfname[0] && | |
634 | strcmp(vrf->name, bs->key.vrfname)) | |
635 | continue; | |
636 | /* need to update the vrf information on | |
637 | * bs so that callbacks are handled | |
638 | */ | |
639 | bs->vrf = vrf; | |
640 | /* Skip enabled sessions. */ | |
641 | if (bs->sock != -1) | |
642 | continue; | |
643 | /* Try to enable it. */ | |
644 | bfd_session_enable(bs); | |
645 | } | |
646 | } | |
647 | ||
648 | void bfdd_sessions_disable_vrf(struct vrf *vrf) | |
649 | { | |
650 | struct bfd_session_observer *bso; | |
651 | struct bfd_session *bs; | |
652 | ||
653 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
d24af713 PG |
654 | bs = bso->bso_bs; |
655 | if (bs->key.vrfname[0] && | |
656 | strcmp(vrf->name, bs->key.vrfname)) | |
657 | continue; | |
658 | /* Skip disabled sessions. */ | |
659 | if (bs->sock == -1) | |
660 | continue; | |
661 | ||
d24af713 PG |
662 | bfd_session_disable(bs); |
663 | } | |
664 | } | |
665 | ||
3c3c3252 | 666 | static int bfd_ifp_destroy(struct interface *ifp) |
80edb675 | 667 | { |
48da2c31 RZ |
668 | if (bglobal.debug_zebra) |
669 | zlog_debug("zclient: delete interface %s", ifp->name); | |
670 | ||
d245e522 | 671 | bfdd_sessions_disable_interface(ifp); |
80edb675 RZ |
672 | |
673 | return 0; | |
674 | } | |
675 | ||
121f9dee | 676 | static int bfdd_interface_vrf_update(ZAPI_CALLBACK_ARGS) |
b333abc2 RZ |
677 | { |
678 | struct interface *ifp; | |
679 | vrf_id_t nvrfid; | |
680 | ||
121f9dee | 681 | ifp = zebra_interface_vrf_update_read(zclient->ibuf, vrf_id, &nvrfid); |
b333abc2 RZ |
682 | if (ifp == NULL) |
683 | return 0; | |
a36898e7 DS |
684 | |
685 | if_update_to_new_vrf(ifp, nvrfid); | |
b333abc2 RZ |
686 | |
687 | return 0; | |
688 | } | |
689 | ||
261e0ba9 RZ |
690 | static void bfdd_sessions_enable_address(struct connected *ifc) |
691 | { | |
692 | struct bfd_session_observer *bso; | |
693 | struct bfd_session *bs; | |
694 | struct prefix prefix; | |
695 | ||
696 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
261e0ba9 RZ |
697 | /* Skip enabled sessions. */ |
698 | bs = bso->bso_bs; | |
699 | if (bs->sock != -1) | |
700 | continue; | |
701 | ||
702 | /* Check address. */ | |
703 | prefix = bso->bso_addr; | |
704 | prefix.prefixlen = ifc->address->prefixlen; | |
705 | if (prefix_cmp(&prefix, ifc->address)) | |
706 | continue; | |
707 | ||
708 | /* Try to enable it. */ | |
709 | bfd_session_enable(bs); | |
710 | } | |
711 | } | |
712 | ||
121f9dee | 713 | static int bfdd_interface_address_update(ZAPI_CALLBACK_ARGS) |
261e0ba9 RZ |
714 | { |
715 | struct connected *ifc; | |
48da2c31 | 716 | char buf[64]; |
261e0ba9 | 717 | |
121f9dee | 718 | ifc = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id); |
261e0ba9 RZ |
719 | if (ifc == NULL) |
720 | return 0; | |
721 | ||
48da2c31 RZ |
722 | if (bglobal.debug_zebra) |
723 | zlog_debug("zclient: %s local address %s", | |
724 | cmd == ZEBRA_INTERFACE_ADDRESS_ADD ? "add" | |
725 | : "delete", | |
726 | prefix2str(ifc->address, buf, sizeof(buf))); | |
727 | ||
261e0ba9 RZ |
728 | bfdd_sessions_enable_address(ifc); |
729 | ||
730 | return 0; | |
731 | } | |
732 | ||
138c5a74 DS |
733 | static int bfd_ifp_create(struct interface *ifp) |
734 | { | |
48da2c31 RZ |
735 | if (bglobal.debug_zebra) |
736 | zlog_debug("zclient: add interface %s", ifp->name); | |
737 | ||
ef7bd2a3 DS |
738 | bfdd_sessions_enable_interface(ifp); |
739 | ||
138c5a74 DS |
740 | return 0; |
741 | } | |
742 | ||
d3af6147 RZ |
743 | void bfdd_zclient_init(struct zebra_privs_t *bfdd_priv) |
744 | { | |
138c5a74 | 745 | if_zapi_callbacks(bfd_ifp_create, NULL, NULL, bfd_ifp_destroy); |
26f63a1e | 746 | zclient = zclient_new(master, &zclient_options_default); |
d3af6147 RZ |
747 | assert(zclient != NULL); |
748 | zclient_init(zclient, ZEBRA_ROUTE_BFD, 0, bfdd_priv); | |
749 | ||
750 | /* | |
751 | * We'll receive all messages through replay, however it will | |
752 | * contain a special field with the real command inside so we | |
753 | * avoid having to create too many handlers. | |
754 | */ | |
755 | zclient->bfd_dest_replay = bfdd_replay; | |
971532e2 RZ |
756 | |
757 | /* Send replay request on zebra connect. */ | |
758 | zclient->zebra_connected = bfdd_zebra_connected; | |
80edb675 | 759 | |
b333abc2 RZ |
760 | /* Learn about interface VRF. */ |
761 | zclient->interface_vrf_update = bfdd_interface_vrf_update; | |
261e0ba9 RZ |
762 | |
763 | /* Learn about new addresses being registered. */ | |
764 | zclient->interface_address_add = bfdd_interface_address_update; | |
765 | zclient->interface_address_delete = bfdd_interface_address_update; | |
d3af6147 RZ |
766 | } |
767 | ||
54aadda1 PG |
768 | void bfdd_zclient_register(vrf_id_t vrf_id) |
769 | { | |
770 | if (!zclient || zclient->sock < 0) | |
771 | return; | |
772 | zclient_send_reg_requests(zclient, vrf_id); | |
773 | } | |
774 | ||
775 | void bfdd_zclient_unregister(vrf_id_t vrf_id) | |
776 | { | |
777 | if (!zclient || zclient->sock < 0) | |
778 | return; | |
779 | zclient_send_dereg_requests(zclient, vrf_id); | |
780 | } | |
781 | ||
d3af6147 RZ |
782 | void bfdd_zclient_stop(void) |
783 | { | |
784 | zclient_stop(zclient); | |
788378fe RZ |
785 | |
786 | /* Clean-up and free ptm clients data memory. */ | |
787 | pc_free_all(); | |
d3af6147 RZ |
788 | } |
789 | ||
790 | ||
791 | /* | |
792 | * Client handling. | |
793 | */ | |
794 | static struct ptm_client *pc_lookup(uint32_t pid) | |
795 | { | |
796 | struct ptm_client *pc; | |
797 | ||
798 | TAILQ_FOREACH (pc, &pcqueue, pc_entry) { | |
799 | if (pc->pc_pid != pid) | |
800 | continue; | |
801 | ||
802 | break; | |
803 | } | |
804 | ||
805 | return pc; | |
806 | } | |
807 | ||
808 | static struct ptm_client *pc_new(uint32_t pid) | |
809 | { | |
810 | struct ptm_client *pc; | |
811 | ||
812 | /* Look up first, if not found create the client. */ | |
813 | pc = pc_lookup(pid); | |
814 | if (pc != NULL) | |
815 | return pc; | |
816 | ||
817 | /* Allocate the client data and save it. */ | |
818 | pc = XCALLOC(MTYPE_BFDD_CONTROL, sizeof(*pc)); | |
d3af6147 RZ |
819 | |
820 | pc->pc_pid = pid; | |
821 | TAILQ_INSERT_HEAD(&pcqueue, pc, pc_entry); | |
822 | return pc; | |
823 | } | |
824 | ||
a375de5c RZ |
825 | static void pc_free(struct ptm_client *pc) |
826 | { | |
827 | struct ptm_client_notification *pcn; | |
828 | ||
829 | if (pc == NULL) | |
830 | return; | |
831 | ||
832 | TAILQ_REMOVE(&pcqueue, pc, pc_entry); | |
833 | ||
834 | while (!TAILQ_EMPTY(&pc->pc_pcnqueue)) { | |
835 | pcn = TAILQ_FIRST(&pc->pc_pcnqueue); | |
836 | pcn_free(pcn); | |
837 | } | |
838 | ||
839 | XFREE(MTYPE_BFDD_CONTROL, pc); | |
840 | } | |
841 | ||
788378fe RZ |
842 | static void pc_free_all(void) |
843 | { | |
844 | struct ptm_client *pc; | |
845 | ||
846 | while (!TAILQ_EMPTY(&pcqueue)) { | |
847 | pc = TAILQ_FIRST(&pcqueue); | |
848 | pc_free(pc); | |
849 | } | |
850 | } | |
851 | ||
d3af6147 RZ |
852 | static struct ptm_client_notification *pcn_new(struct ptm_client *pc, |
853 | struct bfd_session *bs) | |
854 | { | |
855 | struct ptm_client_notification *pcn; | |
856 | ||
857 | /* Try to find an existing pcn fist. */ | |
858 | pcn = pcn_lookup(pc, bs); | |
859 | if (pcn != NULL) | |
860 | return pcn; | |
861 | ||
862 | /* Save the client notification data. */ | |
863 | pcn = XCALLOC(MTYPE_BFDD_NOTIFICATION, sizeof(*pcn)); | |
d3af6147 RZ |
864 | |
865 | TAILQ_INSERT_HEAD(&pc->pc_pcnqueue, pcn, pcn_entry); | |
866 | pcn->pcn_pc = pc; | |
867 | pcn->pcn_bs = bs; | |
868 | bs->refcount++; | |
869 | ||
870 | return pcn; | |
871 | } | |
872 | ||
873 | static struct ptm_client_notification *pcn_lookup(struct ptm_client *pc, | |
874 | struct bfd_session *bs) | |
875 | { | |
876 | struct ptm_client_notification *pcn; | |
877 | ||
878 | TAILQ_FOREACH (pcn, &pc->pc_pcnqueue, pcn_entry) { | |
879 | if (pcn->pcn_bs != bs) | |
880 | continue; | |
881 | ||
882 | break; | |
883 | } | |
884 | ||
885 | return pcn; | |
886 | } | |
887 | ||
888 | static void pcn_free(struct ptm_client_notification *pcn) | |
889 | { | |
890 | struct ptm_client *pc; | |
891 | struct bfd_session *bs; | |
892 | ||
893 | if (pcn == NULL) | |
894 | return; | |
895 | ||
896 | /* Handle session de-registration. */ | |
897 | bs = pcn->pcn_bs; | |
898 | pcn->pcn_bs = NULL; | |
899 | bs->refcount--; | |
900 | ||
901 | /* Handle ptm_client deregistration. */ | |
902 | pc = pcn->pcn_pc; | |
903 | pcn->pcn_pc = NULL; | |
904 | TAILQ_REMOVE(&pc->pc_pcnqueue, pcn, pcn_entry); | |
905 | ||
906 | XFREE(MTYPE_BFDD_NOTIFICATION, pcn); | |
907 | } |