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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" | |
189be399 | 27 | #include "lib/printfrr.h" |
d3af6147 RZ |
28 | |
29 | #include "lib/bfd.h" | |
30 | ||
31 | #include "bfd.h" | |
32 | ||
33 | /* | |
34 | * Data structures | |
35 | */ | |
36 | struct ptm_client_notification { | |
37 | struct bfd_session *pcn_bs; | |
38 | struct ptm_client *pcn_pc; | |
39 | ||
40 | TAILQ_ENTRY(ptm_client_notification) pcn_entry; | |
41 | }; | |
42 | TAILQ_HEAD(pcnqueue, ptm_client_notification); | |
43 | ||
44 | struct ptm_client { | |
45 | uint32_t pc_pid; | |
46 | struct pcnqueue pc_pcnqueue; | |
47 | ||
48 | TAILQ_ENTRY(ptm_client) pc_entry; | |
49 | }; | |
50 | TAILQ_HEAD(pcqueue, ptm_client); | |
51 | ||
52 | static struct pcqueue pcqueue; | |
53 | static struct zclient *zclient; | |
54 | ||
55 | ||
56 | /* | |
57 | * Prototypes | |
58 | */ | |
79b4a6fc | 59 | static int _ptm_msg_address(struct stream *msg, int family, const void *addr); |
d3af6147 RZ |
60 | |
61 | static void _ptm_msg_read_address(struct stream *msg, struct sockaddr_any *sa); | |
45b000d0 | 62 | static int _ptm_msg_read(struct stream *msg, int command, vrf_id_t vrf_id, |
d3af6147 RZ |
63 | struct bfd_peer_cfg *bpc, struct ptm_client **pc); |
64 | ||
65 | static struct ptm_client *pc_lookup(uint32_t pid); | |
66 | static struct ptm_client *pc_new(uint32_t pid); | |
a375de5c | 67 | static void pc_free(struct ptm_client *pc); |
788378fe | 68 | static void pc_free_all(void); |
d3af6147 RZ |
69 | static struct ptm_client_notification *pcn_new(struct ptm_client *pc, |
70 | struct bfd_session *bs); | |
71 | static struct ptm_client_notification *pcn_lookup(struct ptm_client *pc, | |
72 | struct bfd_session *bs); | |
73 | static void pcn_free(struct ptm_client_notification *pcn); | |
74 | ||
75 | ||
45b000d0 PG |
76 | static void bfdd_dest_register(struct stream *msg, vrf_id_t vrf_id); |
77 | static void bfdd_dest_deregister(struct stream *msg, vrf_id_t vrf_id); | |
d3af6147 | 78 | static void bfdd_client_register(struct stream *msg); |
a375de5c | 79 | static void bfdd_client_deregister(struct stream *msg); |
d3af6147 RZ |
80 | |
81 | /* | |
82 | * Functions | |
83 | */ | |
24843702 | 84 | static void debug_printbpc(const struct bfd_peer_cfg *bpc, const char *fmt, ...) |
d3af6147 | 85 | { |
24843702 RZ |
86 | char timers[3][128] = {}; |
87 | char addr[3][128] = {}; | |
18322efd | 88 | char profile[128] = {}; |
24843702 RZ |
89 | char cbit_str[32]; |
90 | char msgbuf[256]; | |
91 | va_list vl; | |
92 | ||
93 | /* Avoid debug calculations if it's disabled. */ | |
94 | if (bglobal.debug_zebra == false) | |
95 | return; | |
d3af6147 RZ |
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) | |
189be399 DL |
110 | snprintfrr(timers[0], sizeof(timers[0]), " rx:%" PRIu64, |
111 | bpc->bpc_recvinterval); | |
d3af6147 RZ |
112 | |
113 | if (bpc->bpc_has_txinterval) | |
189be399 DL |
114 | snprintfrr(timers[1], sizeof(timers[1]), " tx:%" PRIu64, |
115 | bpc->bpc_recvinterval); | |
d3af6147 RZ |
116 | |
117 | if (bpc->bpc_has_detectmultiplier) | |
118 | snprintf(timers[2], sizeof(timers[2]), " detect-multiplier:%d", | |
119 | bpc->bpc_detectmultiplier); | |
120 | ||
24843702 | 121 | snprintf(cbit_str, sizeof(cbit_str), " cbit:0x%02x", bpc->bpc_cbit); |
9beff0bd | 122 | |
18322efd RZ |
123 | if (bpc->bpc_has_profile) |
124 | snprintf(profile, sizeof(profile), " profile:%s", | |
125 | bpc->bpc_profile); | |
126 | ||
24843702 RZ |
127 | va_start(vl, fmt); |
128 | vsnprintf(msgbuf, sizeof(msgbuf), fmt, vl); | |
129 | va_end(vl); | |
d3af6147 | 130 | |
18322efd | 131 | zlog_debug("%s [mhop:%s %s%s%s%s%s%s%s%s]", msgbuf, |
24843702 | 132 | bpc->bpc_mhop ? "yes" : "no", addr[0], addr[1], addr[2], |
18322efd | 133 | timers[0], timers[1], timers[2], cbit_str, profile); |
24843702 | 134 | } |
d3af6147 | 135 | |
29191d31 RZ |
136 | static void _ptm_bfd_session_del(struct bfd_session *bs, uint8_t diag) |
137 | { | |
138 | if (bglobal.debug_peer_event) | |
139 | zlog_debug("session-delete: %s", bs_to_string(bs)); | |
140 | ||
141 | /* Change state and notify peer. */ | |
142 | bs->ses_state = PTM_BFD_DOWN; | |
143 | bs->local_diag = diag; | |
144 | ptm_bfd_snd(bs, 0); | |
145 | ||
146 | /* Session reached refcount == 0, lets delete it. */ | |
147 | if (bs->refcount == 0) { | |
148 | /* | |
149 | * Sanity check: if there is a refcount bug, we can't delete | |
150 | * the session a user configured manually. Lets leave a | |
151 | * message here so we can catch the bug if it exists. | |
152 | */ | |
153 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_CONFIG)) { | |
154 | zlog_err( | |
3efd0893 | 155 | "ptm-del-session: [%s] session refcount is zero but it was configured by CLI", |
29191d31 RZ |
156 | bs_to_string(bs)); |
157 | } else { | |
158 | control_notify_config(BCM_NOTIFY_CONFIG_DELETE, bs); | |
159 | bfd_session_free(bs); | |
160 | } | |
161 | } | |
162 | } | |
163 | ||
79b4a6fc | 164 | static int _ptm_msg_address(struct stream *msg, int family, const void *addr) |
d3af6147 | 165 | { |
79b4a6fc RZ |
166 | stream_putc(msg, family); |
167 | ||
168 | switch (family) { | |
d3af6147 | 169 | case AF_INET: |
79b4a6fc | 170 | stream_put(msg, addr, sizeof(struct in_addr)); |
d3af6147 RZ |
171 | stream_putc(msg, 32); |
172 | break; | |
173 | ||
174 | case AF_INET6: | |
79b4a6fc | 175 | stream_put(msg, addr, sizeof(struct in6_addr)); |
d3af6147 RZ |
176 | stream_putc(msg, 128); |
177 | break; | |
178 | ||
179 | default: | |
79b4a6fc RZ |
180 | assert(0); |
181 | break; | |
d3af6147 RZ |
182 | } |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
7555dc61 | 187 | int ptm_bfd_notify(struct bfd_session *bs, uint8_t notify_state) |
d3af6147 RZ |
188 | { |
189 | struct stream *msg; | |
d3af6147 | 190 | |
0684c9b1 RZ |
191 | bs->stats.znotification++; |
192 | ||
d3af6147 RZ |
193 | /* |
194 | * Message format: | |
195 | * - header: command, vrf | |
196 | * - l: interface index | |
197 | * - c: family | |
198 | * - AF_INET: | |
199 | * - 4 bytes: ipv4 | |
200 | * - AF_INET6: | |
201 | * - 16 bytes: ipv6 | |
202 | * - c: prefix length | |
203 | * - l: bfd status | |
204 | * - c: family | |
205 | * - AF_INET: | |
206 | * - 4 bytes: ipv4 | |
207 | * - AF_INET6: | |
208 | * - 16 bytes: ipv6 | |
209 | * - c: prefix length | |
9beff0bd | 210 | * - c: cbit |
d3af6147 RZ |
211 | * |
212 | * Commands: ZEBRA_BFD_DEST_REPLAY | |
213 | * | |
214 | * q(64), l(32), w(16), c(8) | |
215 | */ | |
216 | msg = zclient->obuf; | |
217 | stream_reset(msg); | |
218 | ||
219 | /* TODO: VRF handling */ | |
45b000d0 PG |
220 | if (bs->vrf) |
221 | zclient_create_header(msg, ZEBRA_BFD_DEST_REPLAY, bs->vrf->vrf_id); | |
222 | else | |
223 | zclient_create_header(msg, ZEBRA_BFD_DEST_REPLAY, VRF_DEFAULT); | |
d3af6147 | 224 | |
971532e2 RZ |
225 | /* This header will be handled by `zebra_ptm.c`. */ |
226 | stream_putl(msg, ZEBRA_INTERFACE_BFD_DEST_UPDATE); | |
227 | ||
d3af6147 | 228 | /* NOTE: Interface is a shortcut to avoid comparing source address. */ |
80edb675 RZ |
229 | if (bs->ifp != NULL) |
230 | stream_putl(msg, bs->ifp->ifindex); | |
231 | else | |
232 | stream_putl(msg, IFINDEX_INTERNAL); | |
d3af6147 RZ |
233 | |
234 | /* BFD destination prefix information. */ | |
79b4a6fc | 235 | _ptm_msg_address(msg, bs->key.family, &bs->key.peer); |
d3af6147 RZ |
236 | |
237 | /* BFD status */ | |
7555dc61 | 238 | switch (notify_state) { |
d3af6147 RZ |
239 | case PTM_BFD_UP: |
240 | stream_putl(msg, BFD_STATUS_UP); | |
241 | break; | |
242 | ||
243 | case PTM_BFD_ADM_DOWN: | |
7555dc61 S |
244 | stream_putl(msg, BFD_STATUS_ADMIN_DOWN); |
245 | break; | |
246 | ||
d3af6147 RZ |
247 | case PTM_BFD_DOWN: |
248 | case PTM_BFD_INIT: | |
249 | stream_putl(msg, BFD_STATUS_DOWN); | |
250 | break; | |
251 | ||
252 | default: | |
253 | stream_putl(msg, BFD_STATUS_UNKNOWN); | |
254 | break; | |
255 | } | |
256 | ||
257 | /* BFD source prefix information. */ | |
79b4a6fc | 258 | _ptm_msg_address(msg, bs->key.family, &bs->key.local); |
d3af6147 | 259 | |
9beff0bd PG |
260 | stream_putc(msg, bs->remote_cbit); |
261 | ||
d3af6147 RZ |
262 | /* Write packet size. */ |
263 | stream_putw_at(msg, 0, stream_get_endp(msg)); | |
264 | ||
265 | return zclient_send_message(zclient); | |
266 | } | |
267 | ||
268 | static void _ptm_msg_read_address(struct stream *msg, struct sockaddr_any *sa) | |
269 | { | |
270 | uint16_t family; | |
271 | ||
272 | STREAM_GETW(msg, family); | |
273 | ||
274 | switch (family) { | |
275 | case AF_INET: | |
276 | sa->sa_sin.sin_family = family; | |
277 | STREAM_GET(&sa->sa_sin.sin_addr, msg, | |
278 | sizeof(sa->sa_sin.sin_addr)); | |
279 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
280 | sa->sa_sin.sin_len = sizeof(sa->sa_sin); | |
281 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
282 | return; | |
283 | ||
284 | case AF_INET6: | |
285 | sa->sa_sin6.sin6_family = family; | |
286 | STREAM_GET(&sa->sa_sin6.sin6_addr, msg, | |
287 | sizeof(sa->sa_sin6.sin6_addr)); | |
288 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
289 | sa->sa_sin6.sin6_len = sizeof(sa->sa_sin6); | |
290 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
291 | return; | |
292 | ||
293 | default: | |
259b64eb | 294 | zlog_warn("ptm-read-address: invalid family: %d", family); |
d3af6147 RZ |
295 | break; |
296 | } | |
297 | ||
298 | stream_failure: | |
299 | memset(sa, 0, sizeof(*sa)); | |
300 | } | |
301 | ||
45b000d0 | 302 | static int _ptm_msg_read(struct stream *msg, int command, vrf_id_t vrf_id, |
d3af6147 RZ |
303 | struct bfd_peer_cfg *bpc, struct ptm_client **pc) |
304 | { | |
305 | uint32_t pid; | |
ae9eebca | 306 | size_t ifnamelen; |
d3af6147 RZ |
307 | |
308 | /* | |
309 | * Register/Deregister/Update Message format: | |
310 | * - header: Command, VRF | |
311 | * - l: pid | |
312 | * - w: family | |
313 | * - AF_INET: | |
314 | * - l: destination ipv4 | |
315 | * - AF_INET6: | |
316 | * - 16 bytes: destination IPv6 | |
317 | * - command != ZEBRA_BFD_DEST_DEREGISTER | |
318 | * - l: min_rx | |
319 | * - l: min_tx | |
320 | * - c: detect multiplier | |
321 | * - c: is_multihop? | |
322 | * - multihop: | |
323 | * - w: family | |
324 | * - AF_INET: | |
325 | * - l: destination ipv4 | |
326 | * - AF_INET6: | |
327 | * - 16 bytes: destination IPv6 | |
328 | * - c: ttl | |
329 | * - no multihop | |
330 | * - AF_INET6: | |
331 | * - w: family | |
332 | * - 16 bytes: ipv6 address | |
333 | * - c: ifname length | |
334 | * - X bytes: interface name | |
9beff0bd | 335 | * - c: bfd_cbit |
18322efd RZ |
336 | * - c: profile name length. |
337 | * - X bytes: profile name. | |
d3af6147 RZ |
338 | * |
339 | * q(64), l(32), w(16), c(8) | |
340 | */ | |
341 | ||
342 | /* Initialize parameters return values. */ | |
343 | memset(bpc, 0, sizeof(*bpc)); | |
344 | *pc = NULL; | |
345 | ||
346 | /* Find or allocate process context data. */ | |
347 | STREAM_GETL(msg, pid); | |
348 | ||
349 | *pc = pc_new(pid); | |
d3af6147 RZ |
350 | |
351 | /* Register/update peer information. */ | |
352 | _ptm_msg_read_address(msg, &bpc->bpc_peer); | |
353 | ||
354 | /* Determine IP type from peer destination. */ | |
355 | bpc->bpc_ipv4 = (bpc->bpc_peer.sa_sin.sin_family == AF_INET); | |
356 | ||
357 | /* Get peer configuration. */ | |
358 | if (command != ZEBRA_BFD_DEST_DEREGISTER) { | |
359 | STREAM_GETL(msg, bpc->bpc_recvinterval); | |
360 | bpc->bpc_has_recvinterval = | |
361 | (bpc->bpc_recvinterval != BPC_DEF_RECEIVEINTERVAL); | |
362 | ||
363 | STREAM_GETL(msg, bpc->bpc_txinterval); | |
364 | bpc->bpc_has_txinterval = | |
365 | (bpc->bpc_txinterval != BPC_DEF_TRANSMITINTERVAL); | |
366 | ||
367 | STREAM_GETC(msg, bpc->bpc_detectmultiplier); | |
368 | bpc->bpc_has_detectmultiplier = | |
369 | (bpc->bpc_detectmultiplier != BPC_DEF_DETECTMULTIPLIER); | |
370 | } | |
371 | ||
372 | /* Read (single|multi)hop and its options. */ | |
373 | STREAM_GETC(msg, bpc->bpc_mhop); | |
374 | if (bpc->bpc_mhop) { | |
375 | /* Read multihop source address and TTL. */ | |
376 | _ptm_msg_read_address(msg, &bpc->bpc_local); | |
262e1d25 RZ |
377 | STREAM_GETC(msg, bpc->bpc_minimum_ttl); |
378 | if (bpc->bpc_minimum_ttl >= BFD_TTL_VAL | |
379 | || bpc->bpc_minimum_ttl == 0) { | |
380 | zlog_warn("%s: received invalid TTL configuration %d", | |
381 | __func__, bpc->bpc_has_minimum_ttl); | |
382 | bpc->bpc_minimum_ttl = BFD_DEF_MHOP_TTL; | |
383 | bpc->bpc_has_minimum_ttl = false; | |
384 | } else { | |
385 | bpc->bpc_minimum_ttl = | |
386 | (BFD_TTL_VAL + 1) - bpc->bpc_minimum_ttl; | |
387 | bpc->bpc_has_minimum_ttl = true; | |
388 | } | |
d3af6147 RZ |
389 | } else { |
390 | /* If target is IPv6, then we must obtain local address. */ | |
391 | if (bpc->bpc_ipv4 == false) | |
392 | _ptm_msg_read_address(msg, &bpc->bpc_local); | |
393 | ||
394 | /* | |
395 | * Read interface name and make sure it fits our data | |
396 | * structure, otherwise fail. | |
397 | */ | |
398 | STREAM_GETC(msg, ifnamelen); | |
ae9f45a3 | 399 | if (ifnamelen >= sizeof(bpc->bpc_localif)) { |
259b64eb | 400 | zlog_err("ptm-read: interface name is too big"); |
d3af6147 RZ |
401 | return -1; |
402 | } | |
403 | ||
404 | bpc->bpc_has_localif = ifnamelen > 0; | |
405 | if (bpc->bpc_has_localif) { | |
406 | STREAM_GET(bpc->bpc_localif, msg, ifnamelen); | |
407 | bpc->bpc_localif[ifnamelen] = 0; | |
408 | } | |
409 | } | |
45b000d0 PG |
410 | if (vrf_id != VRF_DEFAULT) { |
411 | struct vrf *vrf; | |
412 | ||
413 | vrf = vrf_lookup_by_id(vrf_id); | |
414 | if (vrf) { | |
415 | bpc->bpc_has_vrfname = true; | |
416 | strlcpy(bpc->bpc_vrfname, vrf->name, sizeof(bpc->bpc_vrfname)); | |
417 | } else { | |
259b64eb RZ |
418 | zlog_err("ptm-read: vrf id %u could not be identified", |
419 | vrf_id); | |
45b000d0 PG |
420 | return -1; |
421 | } | |
3a20889f PG |
422 | } else { |
423 | bpc->bpc_has_vrfname = true; | |
424 | strlcpy(bpc->bpc_vrfname, VRF_DEFAULT_NAME, sizeof(bpc->bpc_vrfname)); | |
45b000d0 | 425 | } |
d3af6147 | 426 | |
9beff0bd PG |
427 | STREAM_GETC(msg, bpc->bpc_cbit); |
428 | ||
18322efd RZ |
429 | /* Handle profile names. */ |
430 | STREAM_GETC(msg, ifnamelen); | |
431 | bpc->bpc_has_profile = ifnamelen > 0; | |
432 | if (bpc->bpc_has_profile) { | |
433 | STREAM_GET(bpc->bpc_profile, msg, ifnamelen); | |
434 | bpc->bpc_profile[ifnamelen] = 0; | |
435 | } | |
436 | ||
d3af6147 RZ |
437 | /* Sanity check: peer and local address must match IP types. */ |
438 | if (bpc->bpc_local.sa_sin.sin_family != 0 | |
439 | && (bpc->bpc_local.sa_sin.sin_family | |
440 | != bpc->bpc_peer.sa_sin.sin_family)) { | |
259b64eb | 441 | zlog_warn("ptm-read: peer family doesn't match local type"); |
d3af6147 RZ |
442 | return -1; |
443 | } | |
444 | ||
445 | return 0; | |
446 | ||
447 | stream_failure: | |
448 | return -1; | |
449 | } | |
450 | ||
45b000d0 | 451 | static void bfdd_dest_register(struct stream *msg, vrf_id_t vrf_id) |
d3af6147 RZ |
452 | { |
453 | struct ptm_client *pc; | |
d3af6147 RZ |
454 | struct bfd_session *bs; |
455 | struct bfd_peer_cfg bpc; | |
456 | ||
457 | /* Read the client context and peer data. */ | |
45b000d0 | 458 | if (_ptm_msg_read(msg, ZEBRA_BFD_DEST_REGISTER, vrf_id, &bpc, &pc) == -1) |
d3af6147 RZ |
459 | return; |
460 | ||
24843702 | 461 | debug_printbpc(&bpc, "ptm-add-dest: register peer"); |
d3af6147 RZ |
462 | |
463 | /* Find or start new BFD session. */ | |
464 | bs = bs_peer_find(&bpc); | |
465 | if (bs == NULL) { | |
466 | bs = ptm_bfd_sess_new(&bpc); | |
467 | if (bs == NULL) { | |
48da2c31 RZ |
468 | if (bglobal.debug_zebra) |
469 | zlog_debug( | |
470 | "ptm-add-dest: failed to create BFD session"); | |
d3af6147 RZ |
471 | return; |
472 | } | |
ccc9ada8 RZ |
473 | |
474 | /* Protocol created peers are 'no shutdown' by default. */ | |
475 | bs->peer_profile.admin_shutdown = false; | |
d3af6147 | 476 | } else { |
18322efd RZ |
477 | /* |
478 | * BFD session was already created, we are just updating the | |
479 | * current peer. | |
480 | * | |
481 | * `ptm-bfd` (or `HAVE_BFDD == 0`) is the only implementation | |
482 | * that allow users to set peer specific timers via protocol. | |
483 | * BFD daemon (this code) on the other hand only supports | |
484 | * changing peer configuration manually (through `peer` node) | |
485 | * or via profiles. | |
486 | */ | |
487 | if (bpc.bpc_has_profile) | |
488 | bfd_profile_apply(bpc.bpc_profile, bs); | |
d3af6147 RZ |
489 | } |
490 | ||
491 | /* Create client peer notification register. */ | |
08de92af | 492 | pcn_new(pc, bs); |
d3af6147 | 493 | |
7555dc61 | 494 | ptm_bfd_notify(bs, bs->ses_state); |
d3af6147 RZ |
495 | } |
496 | ||
45b000d0 | 497 | static void bfdd_dest_deregister(struct stream *msg, vrf_id_t vrf_id) |
d3af6147 RZ |
498 | { |
499 | struct ptm_client *pc; | |
500 | struct ptm_client_notification *pcn; | |
501 | struct bfd_session *bs; | |
502 | struct bfd_peer_cfg bpc; | |
503 | ||
504 | /* Read the client context and peer data. */ | |
45b000d0 | 505 | if (_ptm_msg_read(msg, ZEBRA_BFD_DEST_DEREGISTER, vrf_id, &bpc, &pc) == -1) |
d3af6147 RZ |
506 | return; |
507 | ||
24843702 | 508 | debug_printbpc(&bpc, "ptm-del-dest: deregister peer"); |
d3af6147 RZ |
509 | |
510 | /* Find or start new BFD session. */ | |
511 | bs = bs_peer_find(&bpc); | |
512 | if (bs == NULL) { | |
48da2c31 RZ |
513 | if (bglobal.debug_zebra) |
514 | zlog_debug("ptm-del-dest: failed to find BFD session"); | |
d3af6147 RZ |
515 | return; |
516 | } | |
517 | ||
518 | /* Unregister client peer notification. */ | |
519 | pcn = pcn_lookup(pc, bs); | |
29191d31 RZ |
520 | if (pcn != NULL) { |
521 | pcn_free(pcn); | |
4c741971 | 522 | return; |
29191d31 | 523 | } |
7555dc61 | 524 | |
29191d31 RZ |
525 | if (bglobal.debug_zebra) |
526 | zlog_debug("ptm-del-dest: failed to find BFD session"); | |
7555dc61 | 527 | |
29191d31 RZ |
528 | /* |
529 | * XXX: We either got a double deregistration or the daemon who | |
530 | * created this is no longer around. Lets try to delete it anyway | |
531 | * and the worst case is the refcount will detain us. | |
532 | */ | |
533 | _ptm_bfd_session_del(bs, BD_NEIGHBOR_DOWN); | |
d3af6147 RZ |
534 | } |
535 | ||
536 | /* | |
537 | * header: command, VRF | |
538 | * l: pid | |
539 | */ | |
540 | static void bfdd_client_register(struct stream *msg) | |
541 | { | |
d3af6147 RZ |
542 | uint32_t pid; |
543 | ||
544 | /* Find or allocate process context data. */ | |
545 | STREAM_GETL(msg, pid); | |
546 | ||
08de92af | 547 | pc_new(pid); |
d3af6147 RZ |
548 | |
549 | return; | |
550 | ||
551 | stream_failure: | |
259b64eb | 552 | zlog_err("ptm-add-client: failed to register client"); |
d3af6147 RZ |
553 | } |
554 | ||
a375de5c RZ |
555 | /* |
556 | * header: command, VRF | |
557 | * l: pid | |
558 | */ | |
559 | static void bfdd_client_deregister(struct stream *msg) | |
560 | { | |
561 | struct ptm_client *pc; | |
562 | uint32_t pid; | |
563 | ||
564 | /* Find or allocate process context data. */ | |
565 | STREAM_GETL(msg, pid); | |
566 | ||
567 | pc = pc_lookup(pid); | |
568 | if (pc == NULL) { | |
48da2c31 RZ |
569 | if (bglobal.debug_zebra) |
570 | zlog_debug("ptm-del-client: failed to find client: %u", | |
571 | pid); | |
a375de5c RZ |
572 | return; |
573 | } | |
574 | ||
29191d31 RZ |
575 | if (bglobal.debug_zebra) |
576 | zlog_debug("ptm-del-client: client pid %u", pid); | |
577 | ||
a375de5c RZ |
578 | pc_free(pc); |
579 | ||
580 | return; | |
581 | ||
582 | stream_failure: | |
259b64eb | 583 | zlog_err("ptm-del-client: failed to deregister client"); |
a375de5c RZ |
584 | } |
585 | ||
121f9dee | 586 | static int bfdd_replay(ZAPI_CALLBACK_ARGS) |
d3af6147 | 587 | { |
121f9dee | 588 | struct stream *msg = zclient->ibuf; |
d3af6147 RZ |
589 | uint32_t rcmd; |
590 | ||
591 | STREAM_GETL(msg, rcmd); | |
592 | ||
593 | switch (rcmd) { | |
594 | case ZEBRA_BFD_DEST_REGISTER: | |
595 | case ZEBRA_BFD_DEST_UPDATE: | |
45b000d0 | 596 | bfdd_dest_register(msg, vrf_id); |
d3af6147 RZ |
597 | break; |
598 | case ZEBRA_BFD_DEST_DEREGISTER: | |
45b000d0 | 599 | bfdd_dest_deregister(msg, vrf_id); |
d3af6147 RZ |
600 | break; |
601 | case ZEBRA_BFD_CLIENT_REGISTER: | |
602 | bfdd_client_register(msg); | |
603 | break; | |
a375de5c RZ |
604 | case ZEBRA_BFD_CLIENT_DEREGISTER: |
605 | bfdd_client_deregister(msg); | |
606 | break; | |
d3af6147 RZ |
607 | |
608 | default: | |
48da2c31 RZ |
609 | if (bglobal.debug_zebra) |
610 | zlog_debug("ptm-replay: invalid message type %u", rcmd); | |
d3af6147 RZ |
611 | return -1; |
612 | } | |
613 | ||
614 | return 0; | |
615 | ||
616 | stream_failure: | |
259b64eb | 617 | zlog_err("ptm-replay: failed to find command"); |
d3af6147 RZ |
618 | return -1; |
619 | } | |
620 | ||
971532e2 RZ |
621 | static void bfdd_zebra_connected(struct zclient *zc) |
622 | { | |
623 | struct stream *msg = zc->obuf; | |
624 | ||
788378fe RZ |
625 | /* Clean-up and free ptm clients data memory. */ |
626 | pc_free_all(); | |
627 | ||
971532e2 RZ |
628 | /* |
629 | * The replay is an empty message just to trigger client daemons | |
630 | * configuration replay. | |
631 | */ | |
632 | stream_reset(msg); | |
633 | zclient_create_header(msg, ZEBRA_BFD_DEST_REPLAY, VRF_DEFAULT); | |
634 | stream_putl(msg, ZEBRA_BFD_DEST_REPLAY); | |
635 | stream_putw_at(msg, 0, stream_get_endp(msg)); | |
636 | ||
80edb675 RZ |
637 | /* Ask for interfaces information. */ |
638 | zclient_create_header(msg, ZEBRA_INTERFACE_ADD, VRF_DEFAULT); | |
639 | ||
640 | /* Send requests. */ | |
971532e2 RZ |
641 | zclient_send_message(zclient); |
642 | } | |
643 | ||
d245e522 RZ |
644 | static void bfdd_sessions_enable_interface(struct interface *ifp) |
645 | { | |
646 | struct bfd_session_observer *bso; | |
647 | struct bfd_session *bs; | |
a36898e7 | 648 | struct vrf *vrf; |
d245e522 RZ |
649 | |
650 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
b4335515 | 651 | bs = bso->bso_bs; |
d245e522 | 652 | /* Interface name mismatch. */ |
79b4a6fc | 653 | if (strcmp(ifp->name, bs->key.ifname)) |
d245e522 | 654 | continue; |
a36898e7 DS |
655 | vrf = vrf_lookup_by_id(ifp->vrf_id); |
656 | if (!vrf) | |
657 | continue; | |
b4335515 PG |
658 | if (bs->key.vrfname[0] && |
659 | strcmp(vrf->name, bs->key.vrfname)) | |
660 | continue; | |
d245e522 RZ |
661 | /* Skip enabled sessions. */ |
662 | if (bs->sock != -1) | |
663 | continue; | |
664 | ||
665 | /* Try to enable it. */ | |
666 | bfd_session_enable(bs); | |
667 | } | |
668 | } | |
669 | ||
670 | static void bfdd_sessions_disable_interface(struct interface *ifp) | |
671 | { | |
672 | struct bfd_session_observer *bso; | |
673 | struct bfd_session *bs; | |
674 | ||
675 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
d245e522 | 676 | bs = bso->bso_bs; |
79b4a6fc | 677 | if (strcmp(ifp->name, bs->key.ifname)) |
d245e522 RZ |
678 | continue; |
679 | /* Skip disabled sessions. */ | |
680 | if (bs->sock == -1) | |
681 | continue; | |
682 | ||
d245e522 RZ |
683 | bfd_session_disable(bs); |
684 | ||
d245e522 RZ |
685 | } |
686 | } | |
687 | ||
d24af713 PG |
688 | void bfdd_sessions_enable_vrf(struct vrf *vrf) |
689 | { | |
690 | struct bfd_session_observer *bso; | |
691 | struct bfd_session *bs; | |
692 | ||
693 | /* it may affect configs without interfaces */ | |
694 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
695 | bs = bso->bso_bs; | |
f06e248c PG |
696 | /* update name */ |
697 | if (bs->vrf && bs->vrf == vrf) { | |
698 | if (!strmatch(bs->key.vrfname, vrf->name)) | |
699 | bfd_session_update_vrf_name(bs, vrf); | |
700 | } | |
d24af713 PG |
701 | if (bs->vrf) |
702 | continue; | |
703 | if (bs->key.vrfname[0] && | |
704 | strcmp(vrf->name, bs->key.vrfname)) | |
705 | continue; | |
706 | /* need to update the vrf information on | |
707 | * bs so that callbacks are handled | |
708 | */ | |
709 | bs->vrf = vrf; | |
710 | /* Skip enabled sessions. */ | |
711 | if (bs->sock != -1) | |
712 | continue; | |
713 | /* Try to enable it. */ | |
714 | bfd_session_enable(bs); | |
715 | } | |
716 | } | |
717 | ||
718 | void bfdd_sessions_disable_vrf(struct vrf *vrf) | |
719 | { | |
720 | struct bfd_session_observer *bso; | |
721 | struct bfd_session *bs; | |
722 | ||
723 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
d24af713 PG |
724 | bs = bso->bso_bs; |
725 | if (bs->key.vrfname[0] && | |
726 | strcmp(vrf->name, bs->key.vrfname)) | |
727 | continue; | |
728 | /* Skip disabled sessions. */ | |
729 | if (bs->sock == -1) | |
730 | continue; | |
731 | ||
d24af713 PG |
732 | bfd_session_disable(bs); |
733 | } | |
734 | } | |
735 | ||
3c3c3252 | 736 | static int bfd_ifp_destroy(struct interface *ifp) |
80edb675 | 737 | { |
48da2c31 RZ |
738 | if (bglobal.debug_zebra) |
739 | zlog_debug("zclient: delete interface %s", ifp->name); | |
740 | ||
d245e522 | 741 | bfdd_sessions_disable_interface(ifp); |
80edb675 RZ |
742 | |
743 | return 0; | |
744 | } | |
745 | ||
121f9dee | 746 | static int bfdd_interface_vrf_update(ZAPI_CALLBACK_ARGS) |
b333abc2 RZ |
747 | { |
748 | struct interface *ifp; | |
749 | vrf_id_t nvrfid; | |
750 | ||
121f9dee | 751 | ifp = zebra_interface_vrf_update_read(zclient->ibuf, vrf_id, &nvrfid); |
b333abc2 RZ |
752 | if (ifp == NULL) |
753 | return 0; | |
a36898e7 DS |
754 | |
755 | if_update_to_new_vrf(ifp, nvrfid); | |
b333abc2 RZ |
756 | |
757 | return 0; | |
758 | } | |
759 | ||
261e0ba9 RZ |
760 | static void bfdd_sessions_enable_address(struct connected *ifc) |
761 | { | |
762 | struct bfd_session_observer *bso; | |
763 | struct bfd_session *bs; | |
764 | struct prefix prefix; | |
765 | ||
766 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
261e0ba9 RZ |
767 | /* Skip enabled sessions. */ |
768 | bs = bso->bso_bs; | |
769 | if (bs->sock != -1) | |
770 | continue; | |
771 | ||
772 | /* Check address. */ | |
773 | prefix = bso->bso_addr; | |
774 | prefix.prefixlen = ifc->address->prefixlen; | |
775 | if (prefix_cmp(&prefix, ifc->address)) | |
776 | continue; | |
777 | ||
778 | /* Try to enable it. */ | |
779 | bfd_session_enable(bs); | |
780 | } | |
781 | } | |
782 | ||
121f9dee | 783 | static int bfdd_interface_address_update(ZAPI_CALLBACK_ARGS) |
261e0ba9 RZ |
784 | { |
785 | struct connected *ifc; | |
786 | ||
121f9dee | 787 | ifc = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id); |
261e0ba9 RZ |
788 | if (ifc == NULL) |
789 | return 0; | |
790 | ||
48da2c31 | 791 | if (bglobal.debug_zebra) |
2dbe669b | 792 | zlog_debug("zclient: %s local address %pFX", |
48da2c31 RZ |
793 | cmd == ZEBRA_INTERFACE_ADDRESS_ADD ? "add" |
794 | : "delete", | |
2dbe669b | 795 | ifc->address); |
48da2c31 | 796 | |
261e0ba9 RZ |
797 | bfdd_sessions_enable_address(ifc); |
798 | ||
799 | return 0; | |
800 | } | |
801 | ||
138c5a74 DS |
802 | static int bfd_ifp_create(struct interface *ifp) |
803 | { | |
48da2c31 RZ |
804 | if (bglobal.debug_zebra) |
805 | zlog_debug("zclient: add interface %s", ifp->name); | |
806 | ||
ef7bd2a3 DS |
807 | bfdd_sessions_enable_interface(ifp); |
808 | ||
138c5a74 DS |
809 | return 0; |
810 | } | |
811 | ||
d3af6147 RZ |
812 | void bfdd_zclient_init(struct zebra_privs_t *bfdd_priv) |
813 | { | |
138c5a74 | 814 | if_zapi_callbacks(bfd_ifp_create, NULL, NULL, bfd_ifp_destroy); |
26f63a1e | 815 | zclient = zclient_new(master, &zclient_options_default); |
d3af6147 RZ |
816 | assert(zclient != NULL); |
817 | zclient_init(zclient, ZEBRA_ROUTE_BFD, 0, bfdd_priv); | |
818 | ||
819 | /* | |
820 | * We'll receive all messages through replay, however it will | |
821 | * contain a special field with the real command inside so we | |
822 | * avoid having to create too many handlers. | |
823 | */ | |
824 | zclient->bfd_dest_replay = bfdd_replay; | |
971532e2 RZ |
825 | |
826 | /* Send replay request on zebra connect. */ | |
827 | zclient->zebra_connected = bfdd_zebra_connected; | |
80edb675 | 828 | |
b333abc2 RZ |
829 | /* Learn about interface VRF. */ |
830 | zclient->interface_vrf_update = bfdd_interface_vrf_update; | |
261e0ba9 RZ |
831 | |
832 | /* Learn about new addresses being registered. */ | |
833 | zclient->interface_address_add = bfdd_interface_address_update; | |
834 | zclient->interface_address_delete = bfdd_interface_address_update; | |
d3af6147 RZ |
835 | } |
836 | ||
54aadda1 PG |
837 | void bfdd_zclient_register(vrf_id_t vrf_id) |
838 | { | |
839 | if (!zclient || zclient->sock < 0) | |
840 | return; | |
841 | zclient_send_reg_requests(zclient, vrf_id); | |
842 | } | |
843 | ||
844 | void bfdd_zclient_unregister(vrf_id_t vrf_id) | |
845 | { | |
846 | if (!zclient || zclient->sock < 0) | |
847 | return; | |
848 | zclient_send_dereg_requests(zclient, vrf_id); | |
849 | } | |
850 | ||
d3af6147 RZ |
851 | void bfdd_zclient_stop(void) |
852 | { | |
853 | zclient_stop(zclient); | |
788378fe RZ |
854 | |
855 | /* Clean-up and free ptm clients data memory. */ | |
856 | pc_free_all(); | |
d3af6147 RZ |
857 | } |
858 | ||
859 | ||
860 | /* | |
861 | * Client handling. | |
862 | */ | |
863 | static struct ptm_client *pc_lookup(uint32_t pid) | |
864 | { | |
865 | struct ptm_client *pc; | |
866 | ||
867 | TAILQ_FOREACH (pc, &pcqueue, pc_entry) { | |
868 | if (pc->pc_pid != pid) | |
869 | continue; | |
870 | ||
871 | break; | |
872 | } | |
873 | ||
874 | return pc; | |
875 | } | |
876 | ||
877 | static struct ptm_client *pc_new(uint32_t pid) | |
878 | { | |
879 | struct ptm_client *pc; | |
880 | ||
881 | /* Look up first, if not found create the client. */ | |
882 | pc = pc_lookup(pid); | |
883 | if (pc != NULL) | |
884 | return pc; | |
885 | ||
886 | /* Allocate the client data and save it. */ | |
887 | pc = XCALLOC(MTYPE_BFDD_CONTROL, sizeof(*pc)); | |
d3af6147 RZ |
888 | |
889 | pc->pc_pid = pid; | |
890 | TAILQ_INSERT_HEAD(&pcqueue, pc, pc_entry); | |
891 | return pc; | |
892 | } | |
893 | ||
a375de5c RZ |
894 | static void pc_free(struct ptm_client *pc) |
895 | { | |
896 | struct ptm_client_notification *pcn; | |
897 | ||
a375de5c RZ |
898 | TAILQ_REMOVE(&pcqueue, pc, pc_entry); |
899 | ||
900 | while (!TAILQ_EMPTY(&pc->pc_pcnqueue)) { | |
901 | pcn = TAILQ_FIRST(&pc->pc_pcnqueue); | |
902 | pcn_free(pcn); | |
903 | } | |
904 | ||
905 | XFREE(MTYPE_BFDD_CONTROL, pc); | |
906 | } | |
907 | ||
788378fe RZ |
908 | static void pc_free_all(void) |
909 | { | |
910 | struct ptm_client *pc; | |
911 | ||
912 | while (!TAILQ_EMPTY(&pcqueue)) { | |
913 | pc = TAILQ_FIRST(&pcqueue); | |
914 | pc_free(pc); | |
915 | } | |
916 | } | |
917 | ||
d3af6147 RZ |
918 | static struct ptm_client_notification *pcn_new(struct ptm_client *pc, |
919 | struct bfd_session *bs) | |
920 | { | |
921 | struct ptm_client_notification *pcn; | |
922 | ||
923 | /* Try to find an existing pcn fist. */ | |
924 | pcn = pcn_lookup(pc, bs); | |
925 | if (pcn != NULL) | |
926 | return pcn; | |
927 | ||
928 | /* Save the client notification data. */ | |
929 | pcn = XCALLOC(MTYPE_BFDD_NOTIFICATION, sizeof(*pcn)); | |
d3af6147 RZ |
930 | |
931 | TAILQ_INSERT_HEAD(&pc->pc_pcnqueue, pcn, pcn_entry); | |
932 | pcn->pcn_pc = pc; | |
933 | pcn->pcn_bs = bs; | |
934 | bs->refcount++; | |
935 | ||
936 | return pcn; | |
937 | } | |
938 | ||
939 | static struct ptm_client_notification *pcn_lookup(struct ptm_client *pc, | |
940 | struct bfd_session *bs) | |
941 | { | |
942 | struct ptm_client_notification *pcn; | |
943 | ||
944 | TAILQ_FOREACH (pcn, &pc->pc_pcnqueue, pcn_entry) { | |
945 | if (pcn->pcn_bs != bs) | |
946 | continue; | |
947 | ||
948 | break; | |
949 | } | |
950 | ||
951 | return pcn; | |
952 | } | |
953 | ||
954 | static void pcn_free(struct ptm_client_notification *pcn) | |
955 | { | |
956 | struct ptm_client *pc; | |
957 | struct bfd_session *bs; | |
958 | ||
d3af6147 RZ |
959 | /* Handle session de-registration. */ |
960 | bs = pcn->pcn_bs; | |
961 | pcn->pcn_bs = NULL; | |
962 | bs->refcount--; | |
963 | ||
29191d31 RZ |
964 | /* Log modification to users. */ |
965 | if (bglobal.debug_zebra) | |
966 | zlog_debug("ptm-del-session: [%s] refcount=%" PRIu64, | |
967 | bs_to_string(bs), bs->refcount); | |
968 | ||
969 | /* Set session down. */ | |
970 | _ptm_bfd_session_del(bs, BD_NEIGHBOR_DOWN); | |
971 | ||
d3af6147 RZ |
972 | /* Handle ptm_client deregistration. */ |
973 | pc = pcn->pcn_pc; | |
974 | pcn->pcn_pc = NULL; | |
975 | TAILQ_REMOVE(&pc->pc_pcnqueue, pcn, pcn_entry); | |
976 | ||
977 | XFREE(MTYPE_BFDD_NOTIFICATION, pcn); | |
978 | } |