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5435a2bf | 1 | /* |
63d4bd12 QY |
2 | * VRRP global definitions and state machine. |
3 | * Copyright (C) 2018-2019 Cumulus Networks, Inc. | |
4 | * Quentin Young | |
5435a2bf QY |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the Free | |
8 | * Software Foundation; either version 2 of the License, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | * more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
41ee5442 QY |
20 | #include <zebra.h> |
21 | ||
862f2f37 QY |
22 | #include "lib/hash.h" |
23 | #include "lib/hook.h" | |
40744000 QY |
24 | #include "lib/if.h" |
25 | #include "lib/linklist.h" | |
862f2f37 | 26 | #include "lib/memory.h" |
91188ca6 | 27 | #include "lib/network.h" |
40744000 | 28 | #include "lib/prefix.h" |
862f2f37 | 29 | #include "lib/sockopt.h" |
dad18a2f | 30 | #include "lib/sockunion.h" |
40744000 | 31 | #include "lib/vrf.h" |
f828842a | 32 | #include "lib/vty.h" |
5435a2bf QY |
33 | |
34 | #include "vrrp.h" | |
40744000 | 35 | #include "vrrp_arp.h" |
b637bcd4 | 36 | #include "vrrp_debug.h" |
72df9d93 | 37 | #include "vrrp_memory.h" |
4f52e9a6 | 38 | #include "vrrp_ndisc.h" |
247aa469 | 39 | #include "vrrp_packet.h" |
f3fe0047 | 40 | #include "vrrp_zebra.h" |
5435a2bf | 41 | |
4ec94408 QY |
42 | #define VRRP_LOGPFX "[CORE] " |
43 | ||
27fd8827 QY |
44 | /* statics */ |
45 | struct hash *vrrp_vrouters_hash; | |
46 | bool vrrp_autoconfig_is_on; | |
47 | int vrrp_autoconfig_version; | |
48 | ||
8cd1d277 QY |
49 | struct vrrp_defaults vd; |
50 | ||
4ec94408 QY |
51 | const char *vrrp_state_names[3] = { |
52 | [VRRP_STATE_INITIALIZE] = "Initialize", | |
53 | [VRRP_STATE_MASTER] = "Master", | |
54 | [VRRP_STATE_BACKUP] = "Backup", | |
55 | }; | |
56 | ||
57 | const char *vrrp_event_names[2] = { | |
58 | [VRRP_EVENT_STARTUP] = "Startup", | |
59 | [VRRP_EVENT_SHUTDOWN] = "Shutdown", | |
60 | }; | |
61 | ||
62 | ||
5435a2bf QY |
63 | /* Utility functions ------------------------------------------------------- */ |
64 | ||
65 | /* | |
66 | * Sets an ethaddr to RFC-defined Virtual Router MAC address. | |
67 | * | |
68 | * mac | |
69 | * ethaddr to set | |
70 | * | |
71 | * v6 | |
72 | * Whether this is a V6 or V4 Virtual Router MAC | |
73 | * | |
74 | * vrid | |
75 | * Virtual Router Identifier | |
76 | */ | |
77 | static void vrrp_mac_set(struct ethaddr *mac, bool v6, uint8_t vrid) | |
78 | { | |
79 | /* | |
80 | * V4: 00-00-5E-00-01-{VRID} | |
81 | * V6: 00-00-5E-00-02-{VRID} | |
82 | */ | |
83 | mac->octet[0] = 0x00; | |
84 | mac->octet[1] = 0x00; | |
85 | mac->octet[2] = 0x5E; | |
86 | mac->octet[3] = 0x00; | |
87 | mac->octet[4] = v6 ? 0x02 : 0x01; | |
88 | mac->octet[5] = vrid; | |
89 | } | |
90 | ||
1d21789e | 91 | /* |
862f2f37 | 92 | * Recalculates and sets skew_time and master_down_interval based |
1d21789e QY |
93 | * values. |
94 | * | |
862f2f37 QY |
95 | * r |
96 | * VRRP Router to operate on | |
1d21789e | 97 | */ |
862f2f37 | 98 | static void vrrp_recalculate_timers(struct vrrp_router *r) |
1d21789e | 99 | { |
8b28e459 | 100 | uint16_t skm = (r->vr->version == 3) ? r->master_adver_interval : 100; |
2884f9bb | 101 | r->skew_time = ((256 - r->vr->priority) * skm) / 256; |
862f2f37 QY |
102 | r->master_down_interval = (3 * r->master_adver_interval); |
103 | r->master_down_interval += r->skew_time; | |
1d21789e QY |
104 | } |
105 | ||
5d3730c5 QY |
106 | /* |
107 | * Determines if a VRRP router is the owner of the specified address. | |
108 | * | |
dad18a2f | 109 | * The determining factor for whether an interface is the address owner is |
2f1fc30f | 110 | * simply whether the address is assigned to the VRRP base interface by someone |
dad18a2f QY |
111 | * other than vrrpd. |
112 | * | |
113 | * This function should always return the correct answer regardless of | |
114 | * master/backup status. | |
115 | * | |
2f1fc30f QY |
116 | * ifp |
117 | * The interface to check owernship of. This should be the base interface of | |
118 | * a VRRP router. | |
119 | * | |
5d3730c5 | 120 | * vr |
862f2f37 | 121 | * Virtual Router |
5d3730c5 QY |
122 | * |
123 | * Returns: | |
124 | * whether or not vr owns the specified address | |
125 | */ | |
7e205b4a | 126 | static bool vrrp_is_owner(struct interface *ifp, struct ipaddr *addr) |
5d3730c5 | 127 | { |
2f1fc30f QY |
128 | /* |
129 | * This code sanity checks implicit ownership configuration. Ideally, | |
130 | * the way we determine address ownership status for this VRRP router | |
131 | * is by looking at whether our VIPs are also assigned to the base | |
132 | * interface, and therefore count as "real" addresses. This frees the | |
133 | * user from having to manually configure priority 255 to indicate | |
134 | * address ownership. However, this means one of the VIPs will be used | |
135 | * as the source address for VRRP advertisements, which in turn means | |
136 | * that other VRRP routers will be receiving packets with a source | |
137 | * address they themselves have. This causes lots of different issues | |
138 | * so for now we're disabling this and forcing the user to configure | |
139 | * priority 255 to indicate ownership. | |
140 | */ | |
141 | ||
142 | return false; | |
143 | ||
144 | #if 0 | |
7e205b4a | 145 | struct prefix p; |
5d3730c5 | 146 | |
7e205b4a QY |
147 | p.family = IS_IPADDR_V4(addr) ? AF_INET : AF_INET6; |
148 | p.prefixlen = IS_IPADDR_V4(addr) ? IPV4_MAX_BITLEN : IPV6_MAX_BITLEN; | |
149 | memcpy(&p.u, &addr->ip, sizeof(addr->ip)); | |
dad18a2f | 150 | |
7e205b4a | 151 | return !!connected_lookup_prefix_exact(ifp, &p); |
2f1fc30f | 152 | #endif |
5d3730c5 QY |
153 | } |
154 | ||
6e93585e QY |
155 | /* |
156 | * Whether an interface has a MAC address that matches the VRRP RFC. | |
157 | * | |
158 | * ifp | |
159 | * Interface to check | |
160 | * | |
161 | * Returns: | |
162 | * Whether the interface has a VRRP mac or not | |
163 | */ | |
164 | static bool vrrp_ifp_has_vrrp_mac(struct interface *ifp) | |
165 | { | |
166 | struct ethaddr vmac4; | |
167 | struct ethaddr vmac6; | |
168 | vrrp_mac_set(&vmac4, 0, 0x00); | |
169 | vrrp_mac_set(&vmac6, 1, 0x00); | |
170 | ||
171 | return !memcmp(ifp->hw_addr, vmac4.octet, sizeof(vmac4.octet) - 1) | |
172 | || !memcmp(ifp->hw_addr, vmac6.octet, sizeof(vmac6.octet) - 1); | |
173 | } | |
174 | ||
175 | /* | |
176 | * Lookup a Virtual Router instance given a macvlan subinterface. | |
177 | * | |
178 | * The VRID is extracted from the interface MAC and the 2-tuple (iface, vrid) | |
179 | * is used to look up any existing instances that match the interface. It does | |
180 | * not matter whether the instance is already bound to the interface or not. | |
181 | * | |
182 | * mvl_ifp | |
183 | * Interface pointer to use to lookup. Should be a macvlan device. | |
184 | * | |
185 | * Returns: | |
186 | * Virtual Router, if found | |
187 | * NULL otherwise | |
188 | */ | |
189 | static struct vrrp_vrouter *vrrp_lookup_by_if_mvl(struct interface *mvl_ifp) | |
190 | { | |
191 | struct interface *p; | |
192 | ||
193 | if (!mvl_ifp || !mvl_ifp->link_ifindex | |
194 | || !vrrp_ifp_has_vrrp_mac(mvl_ifp)) | |
195 | return NULL; | |
196 | ||
197 | p = if_lookup_by_index(mvl_ifp->link_ifindex, VRF_DEFAULT); | |
198 | uint8_t vrid = mvl_ifp->hw_addr[5]; | |
199 | ||
200 | return vrrp_lookup(p, vrid); | |
201 | } | |
202 | ||
203 | /* | |
204 | * Lookup the Virtual Router instances configured on a particular interface. | |
205 | * | |
206 | * ifp | |
207 | * Interface pointer to use to lookup. Should not be a macvlan device. | |
208 | * | |
209 | * Returns: | |
210 | * List of virtual routers found | |
211 | */ | |
212 | static struct list *vrrp_lookup_by_if(struct interface *ifp) | |
213 | { | |
214 | struct list *l = hash_to_list(vrrp_vrouters_hash); | |
215 | struct listnode *ln, *nn; | |
216 | struct vrrp_vrouter *vr; | |
217 | ||
218 | for (ALL_LIST_ELEMENTS(l, ln, nn, vr)) | |
219 | if (vr->ifp != ifp) | |
220 | list_delete_node(l, ln); | |
221 | ||
222 | return l; | |
223 | } | |
224 | ||
225 | /* | |
226 | * Lookup any Virtual Router instances associated with a particular interface. | |
227 | * This is a combination of the results from vrrp_lookup_by_if_mvl and | |
228 | * vrrp_lookup_by_if. | |
229 | * | |
230 | * Suppose the system interface list looks like the following: | |
231 | * | |
232 | * eth0 | |
233 | * \- eth0-v0 00:00:5e:00:01:01 | |
234 | * \- eth0-v1 00:00:5e:00:02:01 | |
235 | * \- eth0-v2 00:00:5e:00:01:0a | |
236 | * | |
237 | * Passing eth0-v2 to this function will give you the VRRP instance configured | |
238 | * on eth0 with VRID 10. Passing eth0-v0 or eth0-v1 will give you the VRRP | |
239 | * instance configured on eth0 with VRID 1. Passing eth0 will give you both. | |
240 | * | |
241 | * ifp | |
242 | * Interface pointer to use to lookup. Can be any interface. | |
243 | * | |
244 | * Returns: | |
245 | * List of virtual routers found | |
246 | */ | |
247 | static struct list *vrrp_lookup_by_if_any(struct interface *ifp) | |
248 | { | |
249 | struct vrrp_vrouter *vr; | |
250 | struct list *vrs; | |
251 | ||
252 | vr = vrrp_lookup_by_if_mvl(ifp); | |
253 | vrs = vr ? list_new() : vrrp_lookup_by_if(ifp); | |
254 | ||
255 | if (vr) | |
256 | listnode_add(vrs, vr); | |
257 | ||
258 | return vrs; | |
259 | } | |
260 | ||
1d21789e QY |
261 | /* Configuration controllers ----------------------------------------------- */ |
262 | ||
6e93585e QY |
263 | void vrrp_check_start(struct vrrp_vrouter *vr) |
264 | { | |
265 | struct vrrp_router *r; | |
266 | bool start; | |
6309f71c | 267 | const char *whynot = NULL; |
6e93585e QY |
268 | |
269 | if (vr->shutdown || vr->ifp == NULL) | |
270 | return; | |
271 | ||
272 | r = vr->v4; | |
114a413e | 273 | /* Must not already be started */ |
6e93585e | 274 | start = r->fsm.state == VRRP_STATE_INITIALIZE; |
114a413e | 275 | /* Must have a parent interface */ |
6e93585e | 276 | start = start && (vr->ifp != NULL); |
6309f71c | 277 | whynot = (!start && !whynot) ? "No base interface" : NULL; |
c16fb340 | 278 | #if 0 |
114a413e | 279 | /* Parent interface must be up */ |
b0ec34c8 | 280 | start = start && if_is_operative(vr->ifp); |
c16fb340 | 281 | #endif |
114a413e QY |
282 | /* Parent interface must have at least one v4 */ |
283 | start = start && vr->ifp->connected->count > 1; | |
6309f71c | 284 | whynot = (!start && !whynot) ? "No primary IPv4 address" : NULL; |
114a413e | 285 | /* Must have a macvlan interface */ |
6e93585e | 286 | start = start && (r->mvl_ifp != NULL); |
6309f71c | 287 | whynot = (!start && !whynot) ? "No VRRP interface" : NULL; |
c16fb340 | 288 | #if 0 |
b0ec34c8 QY |
289 | /* Macvlan interface must be admin up */ |
290 | start = start && CHECK_FLAG(r->mvl_ifp->flags, IFF_UP); | |
c16fb340 | 291 | #endif |
114a413e | 292 | /* Must have at least one VIP configured */ |
6e93585e | 293 | start = start && r->addrs->count > 0; |
6309f71c | 294 | whynot = (!start && !whynot) ? "No Virtual IP address configured" : NULL; |
6e93585e QY |
295 | if (start) |
296 | vrrp_event(r, VRRP_EVENT_STARTUP); | |
6309f71c | 297 | else if (whynot) |
613b45b0 QY |
298 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
299 | "Refusing to start Virtual Router: %s", | |
300 | vr->vrid, family2str(r->family), whynot); | |
6e93585e QY |
301 | |
302 | r = vr->v6; | |
114a413e | 303 | /* Must not already be started */ |
6e93585e | 304 | start = r->fsm.state == VRRP_STATE_INITIALIZE; |
114a413e | 305 | /* Must have a parent interface */ |
6e93585e | 306 | start = start && (vr->ifp != NULL); |
6309f71c | 307 | whynot = (!start && !whynot) ? "No base interface" : NULL; |
c16fb340 | 308 | #if 0 |
114a413e | 309 | /* Parent interface must be up */ |
b0ec34c8 | 310 | start = start && if_is_operative(vr->ifp); |
c16fb340 | 311 | #endif |
114a413e | 312 | /* Must have a macvlan interface */ |
6e93585e | 313 | start = start && (r->mvl_ifp != NULL); |
6309f71c | 314 | whynot = (!start && !whynot) ? "No VRRP interface" : NULL; |
c16fb340 | 315 | #if 0 |
b0ec34c8 QY |
316 | /* Macvlan interface must be admin up */ |
317 | start = start && CHECK_FLAG(r->mvl_ifp->flags, IFF_UP); | |
114a413e QY |
318 | /* Macvlan interface must have a link local */ |
319 | start = start && connected_get_linklocal(r->mvl_ifp); | |
6309f71c | 320 | whynot = (!start && !whynot) ? "No link local address configured" : NULL; |
1760ce42 | 321 | #endif |
6309f71c QY |
322 | /* Macvlan interface must have a v6 IP besides the link local */ |
323 | start = start && (r->mvl_ifp->connected->count >= 2); | |
324 | whynot = (!start && !whynot) ? "No Virtual IP address configured" : NULL; | |
114a413e | 325 | /* Must have at least one VIP configured */ |
6e93585e QY |
326 | start = start && r->addrs->count > 0; |
327 | if (start) | |
328 | vrrp_event(r, VRRP_EVENT_STARTUP); | |
6309f71c | 329 | else if (whynot) |
613b45b0 QY |
330 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
331 | "Refusing to start Virtual Router: %s", | |
332 | vr->vrid, family2str(r->family), whynot); | |
6e93585e QY |
333 | } |
334 | ||
1d21789e | 335 | void vrrp_set_priority(struct vrrp_vrouter *vr, uint8_t priority) |
c23edd74 | 336 | { |
862f2f37 | 337 | vr->priority = priority; |
bac08ded QY |
338 | vr->v4->priority = priority; |
339 | vr->v6->priority = priority; | |
c23edd74 QY |
340 | } |
341 | ||
1d21789e QY |
342 | void vrrp_set_advertisement_interval(struct vrrp_vrouter *vr, |
343 | uint16_t advertisement_interval) | |
344 | { | |
345 | if (vr->advertisement_interval == advertisement_interval) | |
346 | return; | |
347 | ||
862f2f37 QY |
348 | vr->advertisement_interval = advertisement_interval; |
349 | vrrp_recalculate_timers(vr->v4); | |
350 | vrrp_recalculate_timers(vr->v6); | |
351 | } | |
352 | ||
2cd90902 | 353 | static bool vrrp_has_ip(struct vrrp_vrouter *vr, struct ipaddr *ip) |
862f2f37 | 354 | { |
2cd90902 QY |
355 | struct vrrp_router *r = ip->ipa_type == IPADDR_V4 ? vr->v4 : vr->v6; |
356 | struct listnode *ln; | |
357 | struct ipaddr *iter; | |
862f2f37 | 358 | |
2cd90902 | 359 | for (ALL_LIST_ELEMENTS_RO(r->addrs, ln, iter)) |
e920b0b2 | 360 | if (!memcmp(&iter->ip, &ip->ip, IPADDRSZ(ip))) |
2cd90902 | 361 | return true; |
10133a59 | 362 | |
2cd90902 QY |
363 | return false; |
364 | } | |
365 | ||
6e93585e | 366 | int vrrp_add_ip(struct vrrp_router *r, struct ipaddr *ip) |
2cd90902 | 367 | { |
27fd8827 QY |
368 | int af = (ip->ipa_type == IPADDR_V6) ? AF_INET6 : AF_INET; |
369 | ||
370 | assert(r->family == af); | |
371 | ||
2cd90902 QY |
372 | if (vrrp_has_ip(r->vr, ip)) |
373 | return 0; | |
374 | ||
375 | if (!vrrp_is_owner(r->vr->ifp, ip) && r->is_owner) { | |
10133a59 | 376 | char ipbuf[INET6_ADDRSTRLEN]; |
2cd90902 | 377 | inet_ntop(r->family, &ip->ip, ipbuf, sizeof(ipbuf)); |
10133a59 | 378 | zlog_err( |
613b45b0 | 379 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
10133a59 | 380 | "This VRRP router is not the address owner of %s, but is the address owner of other addresses; this config is unsupported.", |
613b45b0 | 381 | r->vr->vrid, family2str(r->family), ipbuf); |
2cd90902 | 382 | return -1; |
10133a59 QY |
383 | } |
384 | ||
72df9d93 | 385 | struct ipaddr *new = XCALLOC(MTYPE_VRRP_IP, sizeof(struct ipaddr)); |
2cd90902 QY |
386 | |
387 | *new = *ip; | |
388 | listnode_add(r->addrs, new); | |
389 | ||
6e93585e | 390 | if (r->fsm.state == VRRP_STATE_MASTER) { |
2cd90902 QY |
391 | switch (r->family) { |
392 | case AF_INET: | |
393 | vrrp_garp_send(r, &new->ipaddr_v4); | |
394 | break; | |
395 | case AF_INET6: | |
396 | vrrp_ndisc_una_send(r, new); | |
397 | break; | |
398 | } | |
399 | } | |
400 | ||
6e93585e | 401 | return 0; |
2cd90902 QY |
402 | } |
403 | ||
6e93585e | 404 | int vrrp_add_ipv4(struct vrrp_vrouter *vr, struct in_addr v4) |
2cd90902 QY |
405 | { |
406 | struct ipaddr ip; | |
407 | ip.ipa_type = IPADDR_V4; | |
408 | ip.ipaddr_v4 = v4; | |
6e93585e | 409 | return vrrp_add_ip(vr->v4, &ip); |
2cd90902 QY |
410 | } |
411 | ||
6e93585e | 412 | int vrrp_add_ipv6(struct vrrp_vrouter *vr, struct in6_addr v6) |
2cd90902 QY |
413 | { |
414 | struct ipaddr ip; | |
415 | ip.ipa_type = IPADDR_V6; | |
416 | ip.ipaddr_v6 = v6; | |
6e93585e | 417 | return vrrp_add_ip(vr->v6, &ip); |
1d21789e QY |
418 | } |
419 | ||
6e93585e | 420 | int vrrp_del_ip(struct vrrp_router *r, struct ipaddr *ip) |
c23edd74 | 421 | { |
2cd90902 QY |
422 | struct listnode *ln, *nn; |
423 | struct ipaddr *iter; | |
424 | int ret = 0; | |
c23edd74 | 425 | |
2cd90902 QY |
426 | if (!vrrp_has_ip(r->vr, ip)) |
427 | return 0; | |
10133a59 | 428 | |
6e93585e QY |
429 | for (ALL_LIST_ELEMENTS(r->addrs, ln, nn, iter)) |
430 | if (!memcmp(&iter->ip, &ip->ip, IPADDRSZ(ip))) | |
431 | list_delete_node(r->addrs, ln); | |
2cd90902 QY |
432 | |
433 | /* | |
6e93585e QY |
434 | * NB: Deleting the last address and then issuing a shutdown will cause |
435 | * transmission of a priority 0 VRRP Advertisement - as per the RFC - | |
436 | * but it will have no addresses. This is not forbidden in the RFC but | |
437 | * might confuse other implementations. | |
2cd90902 | 438 | */ |
6e93585e QY |
439 | if (r->addrs->count == 0 && r->fsm.state != VRRP_STATE_INITIALIZE) |
440 | ret = vrrp_event(r, VRRP_EVENT_SHUTDOWN); | |
10133a59 | 441 | |
2cd90902 QY |
442 | return ret; |
443 | } | |
4f52e9a6 | 444 | |
6e93585e | 445 | int vrrp_del_ipv6(struct vrrp_vrouter *vr, struct in6_addr v6) |
2cd90902 QY |
446 | { |
447 | struct ipaddr ip; | |
448 | ip.ipa_type = IPADDR_V6; | |
449 | ip.ipaddr_v6 = v6; | |
6e93585e | 450 | return vrrp_del_ip(vr->v6, &ip); |
862f2f37 QY |
451 | } |
452 | ||
6e93585e | 453 | int vrrp_del_ipv4(struct vrrp_vrouter *vr, struct in_addr v4) |
862f2f37 | 454 | { |
2cd90902 QY |
455 | struct ipaddr ip; |
456 | ip.ipa_type = IPADDR_V4; | |
457 | ip.ipaddr_v4 = v4; | |
6e93585e | 458 | return vrrp_del_ip(vr->v4, &ip); |
c23edd74 QY |
459 | } |
460 | ||
1d21789e QY |
461 | |
462 | /* Creation and destruction ------------------------------------------------ */ | |
463 | ||
6287cefe QY |
464 | static void vrrp_router_addr_list_del_cb(void *val) |
465 | { | |
466 | struct ipaddr *ip = val; | |
72df9d93 | 467 | XFREE(MTYPE_VRRP_IP, ip); |
6287cefe QY |
468 | } |
469 | ||
85467974 QY |
470 | /* |
471 | * Search for a suitable macvlan subinterface we can attach to, and if found, | |
472 | * attach to it. | |
473 | * | |
474 | * r | |
475 | * Router to attach to interface | |
476 | * | |
477 | * Returns: | |
478 | * Whether an interface was successfully attached | |
479 | */ | |
480 | static bool vrrp_attach_interface(struct vrrp_router *r) | |
862f2f37 | 481 | { |
dad18a2f QY |
482 | /* Search for existing interface with computed MAC address */ |
483 | struct interface **ifps; | |
484 | size_t ifps_cnt = if_lookup_by_hwaddr( | |
485 | r->vmac.octet, sizeof(r->vmac.octet), &ifps, VRF_DEFAULT); | |
486 | ||
487 | /* | |
1b1f3c43 QY |
488 | * Filter to only those macvlan interfaces whose parent is the base |
489 | * interface this VRRP router is configured on. | |
dad18a2f QY |
490 | * |
491 | * If there are still multiple interfaces we just select the first one, | |
492 | * as it should be functionally identical to the others. | |
493 | */ | |
494 | unsigned int candidates = 0; | |
495 | struct interface *selection = NULL; | |
496 | for (unsigned int i = 0; i < ifps_cnt; i++) { | |
b0ec34c8 | 497 | if (ifps[i]->link_ifindex != r->vr->ifp->ifindex) |
dad18a2f QY |
498 | ifps[i] = NULL; |
499 | else { | |
500 | selection = selection ? selection : ifps[i]; | |
501 | candidates++; | |
502 | } | |
503 | } | |
504 | ||
b79640e4 QY |
505 | if (ifps_cnt) |
506 | XFREE(MTYPE_TMP, ifps); | |
dad18a2f QY |
507 | |
508 | char ethstr[ETHER_ADDR_STRLEN]; | |
509 | prefix_mac2str(&r->vmac, ethstr, sizeof(ethstr)); | |
510 | ||
511 | assert(!!selection == !!candidates); | |
512 | ||
513 | if (candidates == 0) | |
613b45b0 QY |
514 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
515 | "Interface: None (no interface found w/ MAC %s)", | |
e6341d21 | 516 | r->vr->vrid, family2str(r->family), ethstr); |
dad18a2f | 517 | else if (candidates > 1) |
613b45b0 QY |
518 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
519 | "Interface: Multiple interfaces found; using %s", | |
e6341d21 | 520 | r->vr->vrid, family2str(r->family), selection->name); |
dad18a2f | 521 | else |
613b45b0 QY |
522 | zlog_info(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
523 | "Interface: %s", | |
e6341d21 | 524 | r->vr->vrid, family2str(r->family), selection->name); |
dad18a2f | 525 | |
7e205b4a | 526 | r->mvl_ifp = selection; |
dad18a2f | 527 | |
85467974 | 528 | return !!r->mvl_ifp; |
85467974 QY |
529 | } |
530 | ||
531 | static struct vrrp_router *vrrp_router_create(struct vrrp_vrouter *vr, | |
532 | int family) | |
533 | { | |
72df9d93 QY |
534 | struct vrrp_router *r = |
535 | XCALLOC(MTYPE_VRRP_RTR, sizeof(struct vrrp_router)); | |
85467974 QY |
536 | |
537 | r->family = family; | |
538 | r->sock_rx = -1; | |
539 | r->sock_tx = -1; | |
540 | r->vr = vr; | |
541 | r->addrs = list_new(); | |
542 | r->addrs->del = vrrp_router_addr_list_del_cb; | |
543 | r->priority = vr->priority; | |
544 | r->fsm.state = VRRP_STATE_INITIALIZE; | |
545 | vrrp_mac_set(&r->vmac, family == AF_INET6, vr->vrid); | |
546 | ||
547 | vrrp_attach_interface(r); | |
548 | ||
862f2f37 QY |
549 | return r; |
550 | } | |
551 | ||
552 | static void vrrp_router_destroy(struct vrrp_router *r) | |
553 | { | |
6287cefe QY |
554 | if (r->is_active) |
555 | vrrp_event(r, VRRP_EVENT_SHUTDOWN); | |
556 | ||
d60b2ffd | 557 | if (r->sock_rx >= 0) { |
dad18a2f | 558 | close(r->sock_rx); |
d60b2ffd QY |
559 | } |
560 | if (r->sock_tx >= 0) { | |
dad18a2f | 561 | close(r->sock_tx); |
d60b2ffd | 562 | } |
6287cefe | 563 | |
862f2f37 QY |
564 | /* FIXME: also delete list elements */ |
565 | list_delete(&r->addrs); | |
72df9d93 | 566 | XFREE(MTYPE_VRRP_RTR, r); |
862f2f37 QY |
567 | } |
568 | ||
99966840 QY |
569 | struct vrrp_vrouter *vrrp_vrouter_create(struct interface *ifp, uint8_t vrid, |
570 | uint8_t version) | |
5435a2bf | 571 | { |
4f0b6b45 | 572 | struct vrrp_vrouter *vr = vrrp_lookup(ifp, vrid); |
6287cefe QY |
573 | |
574 | if (vr) | |
575 | return vr; | |
576 | ||
99966840 QY |
577 | if (version != 2 && version != 3) |
578 | return NULL; | |
579 | ||
72df9d93 | 580 | vr = XCALLOC(MTYPE_VRRP_RTR, sizeof(struct vrrp_vrouter)); |
5435a2bf | 581 | |
5435a2bf | 582 | vr->ifp = ifp; |
99966840 | 583 | vr->version = version; |
5435a2bf | 584 | vr->vrid = vrid; |
8cd1d277 QY |
585 | vr->priority = vd.priority; |
586 | vr->preempt_mode = vd.preempt_mode; | |
587 | vr->accept_mode = vd.accept_mode; | |
588 | vr->shutdown = vd.shutdown; | |
862f2f37 QY |
589 | |
590 | vr->v4 = vrrp_router_create(vr, AF_INET); | |
591 | vr->v6 = vrrp_router_create(vr, AF_INET6); | |
592 | ||
8cd1d277 | 593 | vrrp_set_advertisement_interval(vr, vd.advertisement_interval); |
5435a2bf QY |
594 | |
595 | hash_get(vrrp_vrouters_hash, vr, hash_alloc_intern); | |
596 | ||
597 | return vr; | |
598 | } | |
599 | ||
c23edd74 QY |
600 | void vrrp_vrouter_destroy(struct vrrp_vrouter *vr) |
601 | { | |
862f2f37 QY |
602 | vrrp_router_destroy(vr->v4); |
603 | vrrp_router_destroy(vr->v6); | |
c23edd74 | 604 | hash_release(vrrp_vrouters_hash, vr); |
72df9d93 | 605 | XFREE(MTYPE_VRRP_RTR, vr); |
c23edd74 QY |
606 | } |
607 | ||
4f0b6b45 | 608 | struct vrrp_vrouter *vrrp_lookup(struct interface *ifp, uint8_t vrid) |
5435a2bf QY |
609 | { |
610 | struct vrrp_vrouter vr; | |
611 | vr.vrid = vrid; | |
4f0b6b45 | 612 | vr.ifp = ifp; |
5435a2bf QY |
613 | |
614 | return hash_lookup(vrrp_vrouters_hash, &vr); | |
615 | } | |
616 | ||
617 | /* Network ----------------------------------------------------------------- */ | |
618 | ||
10133a59 QY |
619 | /* Forward decls */ |
620 | static void vrrp_change_state(struct vrrp_router *r, int to); | |
621 | static int vrrp_adver_timer_expire(struct thread *thread); | |
622 | static int vrrp_master_down_timer_expire(struct thread *thread); | |
623 | ||
5435a2bf | 624 | /* |
91188ca6 | 625 | * Create and multicast a VRRP ADVERTISEMENT message. |
5435a2bf | 626 | * |
862f2f37 QY |
627 | * r |
628 | * VRRP Router for which to send ADVERTISEMENT | |
5435a2bf | 629 | */ |
862f2f37 | 630 | static void vrrp_send_advertisement(struct vrrp_router *r) |
5435a2bf | 631 | { |
247aa469 | 632 | struct vrrp_pkt *pkt; |
d9e01e1c | 633 | ssize_t pktsz; |
862f2f37 QY |
634 | struct ipaddr *addrs[r->addrs->count]; |
635 | union sockunion dest; | |
247aa469 | 636 | |
862f2f37 | 637 | list_to_array(r->addrs, (void **)addrs, r->addrs->count); |
247aa469 | 638 | |
99966840 QY |
639 | pktsz = vrrp_pkt_adver_build(&pkt, &r->src, r->vr->version, r->vr->vrid, |
640 | r->priority, r->vr->advertisement_interval, | |
d9e01e1c | 641 | r->addrs->count, (struct ipaddr **)&addrs); |
247aa469 | 642 | |
b637bcd4 QY |
643 | if (DEBUG_MODE_CHECK(&vrrp_dbg_pkt, DEBUG_MODE_ALL)) |
644 | zlog_hexdump(pkt, (size_t)pktsz); | |
247aa469 | 645 | |
354b49d6 QY |
646 | const char *group = r->family == AF_INET ? VRRP_MCASTV4_GROUP_STR |
647 | : VRRP_MCASTV6_GROUP_STR; | |
862f2f37 | 648 | str2sockunion(group, &dest); |
247aa469 | 649 | |
d9e01e1c | 650 | ssize_t sent = sendto(r->sock_tx, pkt, (size_t)pktsz, 0, &dest.sa, |
862f2f37 | 651 | sockunion_sizeof(&dest)); |
4ec94408 | 652 | |
72df9d93 | 653 | XFREE(MTYPE_VRRP_PKT, pkt); |
bb54fa3a | 654 | |
4ec94408 | 655 | if (sent < 0) { |
613b45b0 | 656 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
8071d5c3 | 657 | "Failed to send VRRP Advertisement: %s", |
613b45b0 QY |
658 | r->vr->vrid, family2str(r->family), |
659 | safe_strerror(errno)); | |
6332c77f QY |
660 | } else { |
661 | ++r->stats.adver_tx_cnt; | |
4ec94408 | 662 | } |
5435a2bf QY |
663 | } |
664 | ||
10133a59 QY |
665 | /* |
666 | * Receive and parse VRRP advertisement. | |
667 | * | |
668 | * By the time we get here all fields have been validated for basic correctness | |
669 | * and the packet is a valid VRRP packet. | |
670 | * | |
671 | * However, we have not validated whether the VRID is correct for this virtual | |
672 | * router, nor whether the priority is correct (i.e. is not 255 when we are the | |
99966840 QY |
673 | * address owner), nor whether the advertisement interval equals our own |
674 | * configured value (this check is only performed in VRRPv2). | |
0f1f98e8 QY |
675 | * |
676 | * r | |
677 | * VRRP Router associated with the socket this advertisement was received on | |
678 | * | |
679 | * src | |
680 | * Source address of sender | |
681 | * | |
682 | * pkt | |
683 | * The advertisement they sent | |
684 | * | |
685 | * pktsize | |
686 | * Size of advertisement | |
687 | * | |
688 | * Returns: | |
689 | * -1 if advertisement is invalid | |
690 | * 0 otherwise | |
10133a59 | 691 | */ |
0f1f98e8 QY |
692 | static int vrrp_recv_advertisement(struct vrrp_router *r, struct ipaddr *src, |
693 | struct vrrp_pkt *pkt, size_t pktsize) | |
5435a2bf | 694 | { |
3708883c QY |
695 | char sipstr[INET6_ADDRSTRLEN]; |
696 | ipaddr2str(src, sipstr, sizeof(sipstr)); | |
c7e65c4f QY |
697 | char dipstr[INET6_ADDRSTRLEN]; |
698 | ipaddr2str(&r->src, dipstr, sizeof(dipstr)); | |
3708883c | 699 | |
91188ca6 | 700 | char dumpbuf[BUFSIZ]; |
d9e01e1c | 701 | vrrp_pkt_adver_dump(dumpbuf, sizeof(dumpbuf), pkt); |
b637bcd4 | 702 | DEBUGD(&vrrp_dbg_proto, |
613b45b0 | 703 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
b637bcd4 | 704 | "Received VRRP Advertisement from %s:\n%s", |
613b45b0 | 705 | r->vr->vrid, family2str(r->family), sipstr, dumpbuf); |
10133a59 QY |
706 | |
707 | /* Check that VRID matches our configured VRID */ | |
708 | if (pkt->hdr.vrid != r->vr->vrid) { | |
b637bcd4 | 709 | DEBUGD(&vrrp_dbg_proto, |
613b45b0 QY |
710 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
711 | "Datagram invalid: Advertisement contains VRID %" PRIu8 | |
b637bcd4 QY |
712 | " which does not match our instance", |
713 | r->vr->vrid, family2str(r->family), pkt->hdr.vrid); | |
10133a59 QY |
714 | return -1; |
715 | } | |
716 | ||
717 | /* Verify that we are not the IPvX address owner */ | |
718 | if (r->is_owner) { | |
b637bcd4 | 719 | DEBUGD(&vrrp_dbg_proto, |
613b45b0 QY |
720 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
721 | "Datagram invalid: Received advertisement but we are the address owner", | |
b637bcd4 | 722 | r->vr->vrid, family2str(r->family)); |
10133a59 QY |
723 | return -1; |
724 | } | |
725 | ||
99966840 QY |
726 | /* If v2, verify that adver time matches ours */ |
727 | bool adveq = (pkt->hdr.v2.adver_int | |
728 | == MAX(r->vr->advertisement_interval / 100, 1)); | |
729 | if (r->vr->version == 2 && !adveq) { | |
b637bcd4 | 730 | DEBUGD(&vrrp_dbg_proto, |
613b45b0 QY |
731 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
732 | "Datagram invalid: Received advertisement with advertisement interval %" PRIu8 | |
b637bcd4 QY |
733 | " unequal to our configured value %u", |
734 | r->vr->vrid, family2str(r->family), | |
735 | pkt->hdr.v2.adver_int, | |
736 | MAX(r->vr->advertisement_interval / 100, 1)); | |
99966840 QY |
737 | return -1; |
738 | } | |
739 | ||
740 | ||
10133a59 | 741 | /* Check that # IPs received matches our # configured IPs */ |
b637bcd4 QY |
742 | if (pkt->hdr.naddr != r->addrs->count) |
743 | DEBUGD(&vrrp_dbg_proto, | |
613b45b0 QY |
744 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
745 | "Datagram has %" PRIu8 | |
b637bcd4 QY |
746 | " addresses, but this VRRP instance has %u", |
747 | r->vr->vrid, family2str(r->family), pkt->hdr.naddr, | |
748 | r->addrs->count); | |
10133a59 | 749 | |
6332c77f QY |
750 | ++r->stats.adver_rx_cnt; |
751 | ||
0f1f98e8 | 752 | int addrcmp; |
0f1f98e8 | 753 | |
10133a59 QY |
754 | switch (r->fsm.state) { |
755 | case VRRP_STATE_MASTER: | |
e920b0b2 | 756 | addrcmp = memcmp(&src->ip, &r->src.ip, IPADDRSZ(src)); |
0f1f98e8 | 757 | |
10133a59 QY |
758 | if (pkt->hdr.priority == 0) { |
759 | vrrp_send_advertisement(r); | |
760 | THREAD_OFF(r->t_adver_timer); | |
761 | thread_add_timer_msec( | |
762 | master, vrrp_adver_timer_expire, r, | |
763 | r->vr->advertisement_interval * 10, | |
764 | &r->t_adver_timer); | |
0f1f98e8 | 765 | } else if (pkt->hdr.priority > r->priority |
354b49d6 QY |
766 | || ((pkt->hdr.priority == r->priority) |
767 | && addrcmp > 0)) { | |
3708883c | 768 | zlog_info( |
613b45b0 | 769 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
3708883c QY |
770 | "Received advertisement from %s w/ priority %" PRIu8 |
771 | "; switching to Backup", | |
613b45b0 QY |
772 | r->vr->vrid, family2str(r->family), sipstr, |
773 | pkt->hdr.priority); | |
10133a59 | 774 | THREAD_OFF(r->t_adver_timer); |
99966840 QY |
775 | if (r->vr->version == 3) { |
776 | r->master_adver_interval = | |
777 | htons(pkt->hdr.v3.adver_int); | |
778 | } | |
10133a59 QY |
779 | vrrp_recalculate_timers(r); |
780 | THREAD_OFF(r->t_master_down_timer); | |
781 | thread_add_timer_msec(master, | |
782 | vrrp_master_down_timer_expire, r, | |
783 | r->master_down_interval * 10, | |
784 | &r->t_master_down_timer); | |
785 | vrrp_change_state(r, VRRP_STATE_BACKUP); | |
786 | } else { | |
787 | /* Discard advertisement */ | |
b637bcd4 | 788 | DEBUGD(&vrrp_dbg_proto, |
613b45b0 | 789 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
c7e65c4f | 790 | "Discarding advertisement from %s (%" PRIu8 |
a6070d48 | 791 | " <= %" PRIu8 " & %s <= %s)", |
613b45b0 QY |
792 | r->vr->vrid, family2str(r->family), sipstr, |
793 | pkt->hdr.priority, r->priority, sipstr, dipstr); | |
10133a59 QY |
794 | } |
795 | break; | |
796 | case VRRP_STATE_BACKUP: | |
797 | if (pkt->hdr.priority == 0) { | |
798 | THREAD_OFF(r->t_master_down_timer); | |
799 | thread_add_timer_msec( | |
800 | master, vrrp_master_down_timer_expire, r, | |
801 | r->skew_time * 10, &r->t_master_down_timer); | |
802 | } else if (r->vr->preempt_mode == false | |
803 | || pkt->hdr.priority >= r->priority) { | |
99966840 QY |
804 | if (r->vr->version == 3) { |
805 | r->master_adver_interval = | |
806 | ntohs(pkt->hdr.v3.adver_int); | |
807 | } | |
10133a59 QY |
808 | vrrp_recalculate_timers(r); |
809 | THREAD_OFF(r->t_master_down_timer); | |
810 | thread_add_timer_msec(master, | |
811 | vrrp_master_down_timer_expire, r, | |
812 | r->master_down_interval * 10, | |
813 | &r->t_master_down_timer); | |
814 | } else if (r->vr->preempt_mode == true | |
815 | && pkt->hdr.priority < r->priority) { | |
816 | /* Discard advertisement */ | |
b637bcd4 | 817 | DEBUGD(&vrrp_dbg_proto, |
613b45b0 | 818 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
c7e65c4f QY |
819 | "Discarding advertisement from %s (%" PRIu8 |
820 | " < %" PRIu8 " & preempt = true)", | |
613b45b0 QY |
821 | r->vr->vrid, family2str(r->family), sipstr, |
822 | pkt->hdr.priority, r->priority); | |
10133a59 QY |
823 | } |
824 | break; | |
825 | case VRRP_STATE_INITIALIZE: | |
613b45b0 | 826 | zlog_err(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
10133a59 | 827 | "Received ADVERTISEMENT in state %s; this is a bug", |
613b45b0 QY |
828 | r->vr->vrid, family2str(r->family), |
829 | vrrp_state_names[r->fsm.state]); | |
10133a59 QY |
830 | break; |
831 | } | |
832 | ||
833 | return 0; | |
91188ca6 QY |
834 | } |
835 | ||
836 | /* | |
837 | * Read and process next IPvX datagram. | |
838 | */ | |
839 | static int vrrp_read(struct thread *thread) | |
840 | { | |
841 | struct vrrp_router *r = thread->arg; | |
842 | ||
843 | struct vrrp_pkt *pkt; | |
844 | ssize_t pktsize; | |
845 | ssize_t nbytes; | |
846 | bool resched; | |
847 | char errbuf[BUFSIZ]; | |
fa211f1c | 848 | struct sockaddr_storage sa; |
91188ca6 | 849 | uint8_t control[64]; |
d04bb25a | 850 | struct ipaddr src = {}; |
91188ca6 QY |
851 | |
852 | struct msghdr m; | |
853 | struct iovec iov; | |
854 | iov.iov_base = r->ibuf; | |
855 | iov.iov_len = sizeof(r->ibuf); | |
fa211f1c QY |
856 | m.msg_name = &sa; |
857 | m.msg_namelen = sizeof(sa); | |
91188ca6 QY |
858 | m.msg_iov = &iov; |
859 | m.msg_iovlen = 1; | |
860 | m.msg_control = control; | |
861 | m.msg_controllen = sizeof(control); | |
862 | ||
dad18a2f | 863 | nbytes = recvmsg(r->sock_rx, &m, MSG_DONTWAIT); |
91188ca6 QY |
864 | |
865 | if ((nbytes < 0 && ERRNO_IO_RETRY(errno))) { | |
866 | resched = true; | |
867 | goto done; | |
868 | } else if (nbytes <= 0) { | |
869 | vrrp_event(r, VRRP_EVENT_SHUTDOWN); | |
870 | resched = false; | |
871 | goto done; | |
872 | } | |
873 | ||
b637bcd4 QY |
874 | if (DEBUG_MODE_CHECK(&vrrp_dbg_pkt, DEBUG_MODE_ALL)) { |
875 | DEBUGD(&vrrp_dbg_pkt, | |
613b45b0 QY |
876 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
877 | "Datagram rx: ", | |
b637bcd4 QY |
878 | r->vr->vrid, family2str(r->family)); |
879 | zlog_hexdump(r->ibuf, nbytes); | |
880 | } | |
91188ca6 | 881 | |
8cb3d803 QY |
882 | pktsize = vrrp_pkt_parse_datagram(r->family, r->vr->version, &m, nbytes, |
883 | &src, &pkt, errbuf, sizeof(errbuf)); | |
91188ca6 | 884 | |
613b45b0 | 885 | if (pktsize < 0) |
b637bcd4 | 886 | DEBUGD(&vrrp_dbg_pkt, |
613b45b0 QY |
887 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
888 | "Datagram invalid: %s", | |
b637bcd4 | 889 | r->vr->vrid, family2str(r->family), errbuf); |
613b45b0 | 890 | else |
0f1f98e8 | 891 | vrrp_recv_advertisement(r, &src, pkt, pktsize); |
91188ca6 QY |
892 | |
893 | resched = true; | |
894 | ||
895 | done: | |
896 | memset(r->ibuf, 0x00, sizeof(r->ibuf)); | |
897 | ||
898 | if (resched) | |
dad18a2f QY |
899 | thread_add_read(master, vrrp_read, r, r->sock_rx, &r->t_read); |
900 | ||
901 | return 0; | |
902 | } | |
903 | ||
904 | /* | |
905 | * Finds the first connected address of the appropriate family on a VRRP | |
906 | * router's interface and binds the Tx socket of the VRRP router to that | |
907 | * address. | |
908 | * | |
8071d5c3 QY |
909 | * Also sets src field of vrrp_router. |
910 | * | |
dad18a2f QY |
911 | * r |
912 | * VRRP router to operate on | |
913 | * | |
914 | * Returns: | |
915 | * 0 on success | |
916 | * -1 on failure | |
917 | */ | |
918 | static int vrrp_bind_to_primary_connected(struct vrrp_router *r) | |
919 | { | |
920 | char ipstr[INET6_ADDRSTRLEN]; | |
7e205b4a QY |
921 | struct interface *ifp; |
922 | ||
bd0934fa QY |
923 | /* |
924 | * A slight quirk: the RFC specifies that advertisements under IPv6 must | |
925 | * be transmitted using the link local address of the source interface | |
926 | */ | |
927 | ifp = r->family == AF_INET ? r->vr->ifp : r->mvl_ifp; | |
dad18a2f QY |
928 | |
929 | struct listnode *ln; | |
930 | struct connected *c = NULL; | |
7e205b4a | 931 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, ln, c)) |
22e4b6a7 QY |
932 | if (c->address->family == r->family) { |
933 | if (r->family == AF_INET6 | |
934 | && IN6_IS_ADDR_LINKLOCAL(&c->address->u.prefix6)) | |
935 | break; | |
936 | else if (r->family == AF_INET) | |
937 | break; | |
938 | } | |
dad18a2f QY |
939 | |
940 | if (c == NULL) { | |
613b45b0 QY |
941 | zlog_err(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
942 | "Failed to find address to bind on %s", | |
7e205b4a | 943 | r->vr->vrid, family2str(r->family), ifp->name); |
dad18a2f QY |
944 | return -1; |
945 | } | |
946 | ||
7e205b4a QY |
947 | union sockunion su; |
948 | memset(&su, 0x00, sizeof(su)); | |
dad18a2f | 949 | |
7e205b4a QY |
950 | switch (r->family) { |
951 | case AF_INET: | |
8071d5c3 QY |
952 | r->src.ipa_type = IPADDR_V4; |
953 | r->src.ipaddr_v4 = c->address->u.prefix4; | |
7e205b4a QY |
954 | su.sin.sin_family = AF_INET; |
955 | su.sin.sin_addr = c->address->u.prefix4; | |
956 | break; | |
957 | case AF_INET6: | |
8071d5c3 QY |
958 | r->src.ipa_type = IPADDR_V6; |
959 | r->src.ipaddr_v6 = c->address->u.prefix6; | |
7e205b4a QY |
960 | su.sin6.sin6_family = AF_INET6; |
961 | su.sin6.sin6_scope_id = ifp->ifindex; | |
962 | su.sin6.sin6_addr = c->address->u.prefix6; | |
963 | break; | |
964 | } | |
dad18a2f QY |
965 | |
966 | sockopt_reuseaddr(r->sock_tx); | |
7e205b4a | 967 | if (bind(r->sock_tx, (const struct sockaddr *)&su, sizeof(su)) < 0) { |
dad18a2f | 968 | zlog_err( |
613b45b0 | 969 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
dad18a2f | 970 | "Failed to bind Tx socket to primary IP address %s: %s", |
613b45b0 | 971 | r->vr->vrid, family2str(r->family), |
dad18a2f QY |
972 | inet_ntop(r->family, |
973 | (const void *)&c->address->u.prefix, ipstr, | |
974 | sizeof(ipstr)), | |
975 | safe_strerror(errno)); | |
976 | return -1; | |
977 | } else { | |
b637bcd4 | 978 | DEBUGD(&vrrp_dbg_sock, |
613b45b0 | 979 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
b637bcd4 | 980 | "Bound Tx socket to primary IP address %s", |
613b45b0 | 981 | r->vr->vrid, family2str(r->family), |
b637bcd4 QY |
982 | inet_ntop(r->family, (const void *)&c->address->u.prefix, |
983 | ipstr, sizeof(ipstr))); | |
dad18a2f | 984 | } |
91188ca6 QY |
985 | |
986 | return 0; | |
5435a2bf | 987 | } |
5435a2bf QY |
988 | |
989 | /* | |
dad18a2f QY |
990 | * Creates and configures VRRP router sockets. |
991 | * | |
992 | * This function: | |
993 | * - Creates two sockets, one for Tx, one for Rx | |
994 | * - Joins the Rx socket to the appropriate VRRP multicast group | |
995 | * - Sets the Tx socket to set the TTL (v4) or Hop Limit (v6) field to 255 for | |
996 | * all transmitted IPvX packets | |
997 | * - Requests the kernel to deliver IPv6 header values needed to validate VRRP | |
998 | * packets | |
dad18a2f QY |
999 | * |
1000 | * If any of the above fail, the sockets are closed. The only exception is if | |
1001 | * the TTL / Hop Limit settings fail; these are logged, but configuration | |
1002 | * proceeds. | |
5435a2bf QY |
1003 | * |
1004 | * The first connected address on the Virtual Router's interface is used as the | |
1005 | * interface address. | |
1006 | * | |
862f2f37 QY |
1007 | * r |
1008 | * VRRP Router for which to create listen socket | |
dad18a2f QY |
1009 | * |
1010 | * Returns: | |
1011 | * 0 on success | |
1012 | * -1 on failure | |
5435a2bf | 1013 | */ |
862f2f37 | 1014 | static int vrrp_socket(struct vrrp_router *r) |
5435a2bf | 1015 | { |
5435a2bf | 1016 | int ret; |
91188ca6 | 1017 | bool failed = false; |
5435a2bf | 1018 | |
dad18a2f QY |
1019 | frr_elevate_privs(&vrrp_privs) |
1020 | { | |
1021 | r->sock_rx = socket(r->family, SOCK_RAW, IPPROTO_VRRP); | |
1022 | r->sock_tx = socket(r->family, SOCK_RAW, IPPROTO_VRRP); | |
5435a2bf QY |
1023 | } |
1024 | ||
dad18a2f QY |
1025 | if (r->sock_rx < 0 || r->sock_tx < 0) { |
1026 | const char *rxtx = r->sock_rx < 0 ? "Rx" : "Tx"; | |
613b45b0 QY |
1027 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1028 | "Can't create VRRP %s socket", | |
dad18a2f | 1029 | r->vr->vrid, family2str(r->family), rxtx); |
91188ca6 QY |
1030 | failed = true; |
1031 | goto done; | |
4ec94408 | 1032 | } |
40744000 | 1033 | |
dad18a2f | 1034 | /* Configure sockets */ |
91188ca6 | 1035 | if (r->family == AF_INET) { |
dad18a2f | 1036 | /* Set Tx socket to always Tx with TTL set to 255 */ |
91188ca6 | 1037 | int ttl = 255; |
dad18a2f | 1038 | ret = setsockopt(r->sock_tx, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, |
91188ca6 QY |
1039 | sizeof(ttl)); |
1040 | if (ret < 0) { | |
1041 | zlog_warn( | |
613b45b0 | 1042 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
91188ca6 | 1043 | "Failed to set outgoing multicast TTL count to 255; RFC 5798 compliant implementations will drop our packets", |
613b45b0 | 1044 | r->vr->vrid, family2str(r->family)); |
91188ca6 QY |
1045 | } |
1046 | ||
6ad94d3a QY |
1047 | /* Set Tx socket DSCP byte */ |
1048 | setsockopt_ipv4_tos(r->sock_tx, IPTOS_PREC_INTERNETCONTROL); | |
1049 | ||
6e9529ed QY |
1050 | /* Turn off multicast loop on Tx */ |
1051 | setsockopt_ipv4_multicast_loop(r->sock_tx, 0); | |
1052 | ||
b523b241 QY |
1053 | /* Bind Rx socket to exact interface */ |
1054 | vrrp_privs.change(ZPRIVS_RAISE); | |
1055 | { | |
1056 | ret = setsockopt(r->sock_rx, SOL_SOCKET, | |
1057 | SO_BINDTODEVICE, r->vr->ifp->name, | |
1058 | strlen(r->vr->ifp->name)); | |
1059 | } | |
1060 | vrrp_privs.change(ZPRIVS_LOWER); | |
1061 | if (ret) { | |
613b45b0 | 1062 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
b523b241 | 1063 | "Failed to bind Rx socket to %s: %s", |
613b45b0 QY |
1064 | r->vr->vrid, family2str(r->family), |
1065 | r->vr->ifp->name, safe_strerror(errno)); | |
b523b241 QY |
1066 | failed = true; |
1067 | goto done; | |
1068 | } | |
b637bcd4 | 1069 | DEBUGD(&vrrp_dbg_sock, |
613b45b0 QY |
1070 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1071 | "Bound Rx socket to %s", | |
1072 | r->vr->vrid, family2str(r->family), r->vr->ifp->name); | |
b523b241 QY |
1073 | |
1074 | /* Bind Rx socket to v4 multicast address */ | |
1075 | struct sockaddr_in sa = {0}; | |
1076 | sa.sin_family = AF_INET; | |
1077 | sa.sin_addr.s_addr = htonl(VRRP_MCASTV4_GROUP); | |
1078 | if (bind(r->sock_rx, (struct sockaddr *)&sa, sizeof(sa))) { | |
1079 | zlog_err( | |
613b45b0 QY |
1080 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1081 | "Failed to bind Rx socket to VRRP multicast group: %s", | |
b523b241 QY |
1082 | r->vr->vrid, family2str(r->family), |
1083 | safe_strerror(errno)); | |
1084 | failed = true; | |
1085 | goto done; | |
1086 | } | |
b637bcd4 | 1087 | DEBUGD(&vrrp_dbg_sock, |
613b45b0 QY |
1088 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1089 | "Bound Rx socket to VRRP multicast group", | |
b637bcd4 | 1090 | r->vr->vrid, family2str(r->family)); |
b523b241 | 1091 | |
dad18a2f QY |
1092 | /* Join Rx socket to VRRP IPv4 multicast group */ |
1093 | struct connected *c = listhead(r->vr->ifp->connected)->data; | |
91188ca6 | 1094 | struct in_addr v4 = c->address->u.prefix4; |
dad18a2f QY |
1095 | ret = setsockopt_ipv4_multicast(r->sock_rx, IP_ADD_MEMBERSHIP, |
1096 | v4, htonl(VRRP_MCASTV4_GROUP), | |
862f2f37 | 1097 | r->vr->ifp->ifindex); |
b523b241 QY |
1098 | if (ret < 0) { |
1099 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID | |
1100 | "Failed to join VRRP %s multicast group", | |
1101 | r->vr->vrid, family2str(r->family)); | |
1102 | failed = true; | |
1103 | goto done; | |
1104 | } | |
b637bcd4 | 1105 | DEBUGD(&vrrp_dbg_sock, |
613b45b0 QY |
1106 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1107 | "Joined VRRP multicast group", | |
b637bcd4 | 1108 | r->vr->vrid, family2str(r->family)); |
7e205b4a QY |
1109 | |
1110 | /* Set outgoing interface for advertisements */ | |
1111 | struct ip_mreqn mreqn = {}; | |
1112 | mreqn.imr_ifindex = r->mvl_ifp->ifindex; | |
1113 | ret = setsockopt(r->sock_tx, IPPROTO_IP, IP_MULTICAST_IF, | |
1114 | (void *)&mreqn, sizeof(mreqn)); | |
1115 | if (ret < 0) { | |
1116 | zlog_warn( | |
613b45b0 | 1117 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
7e205b4a | 1118 | "Could not set %s as outgoing multicast interface", |
613b45b0 QY |
1119 | r->vr->vrid, family2str(r->family), |
1120 | r->mvl_ifp->name); | |
7e205b4a QY |
1121 | failed = true; |
1122 | goto done; | |
1123 | } | |
b637bcd4 | 1124 | DEBUGD(&vrrp_dbg_sock, |
613b45b0 | 1125 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
b637bcd4 | 1126 | "Set %s as outgoing multicast interface", |
613b45b0 | 1127 | r->vr->vrid, family2str(r->family), r->mvl_ifp->name); |
1760ce42 QY |
1128 | |
1129 | /* Select and bind source address */ | |
1130 | if (vrrp_bind_to_primary_connected(r) < 0) { | |
1131 | failed = true; | |
1132 | goto done; | |
1133 | } | |
1134 | ||
91188ca6 | 1135 | } else if (r->family == AF_INET6) { |
dad18a2f QY |
1136 | /* Always transmit IPv6 packets with hop limit set to 255 */ |
1137 | ret = setsockopt_ipv6_multicast_hops(r->sock_tx, 255); | |
91188ca6 QY |
1138 | if (ret < 0) { |
1139 | zlog_warn( | |
613b45b0 | 1140 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
91188ca6 | 1141 | "Failed to set outgoing multicast hop count to 255; RFC 5798 compliant implementations will drop our packets", |
613b45b0 | 1142 | r->vr->vrid, family2str(r->family)); |
91188ca6 | 1143 | } |
d04bb25a | 1144 | |
6ad94d3a QY |
1145 | /* Set Tx socket DSCP byte */ |
1146 | setsockopt_ipv6_tclass(r->sock_tx, IPTOS_PREC_INTERNETCONTROL); | |
1147 | ||
d04bb25a QY |
1148 | /* Request hop limit delivery */ |
1149 | setsockopt_ipv6_hoplimit(r->sock_rx, 1); | |
91188ca6 | 1150 | if (ret < 0) { |
613b45b0 | 1151 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
91188ca6 | 1152 | "Failed to request IPv6 Hop Limit delivery", |
613b45b0 | 1153 | r->vr->vrid, family2str(r->family)); |
91188ca6 QY |
1154 | failed = true; |
1155 | goto done; | |
1156 | } | |
1157 | ||
6e9529ed QY |
1158 | /* Turn off multicast loop on Tx */ |
1159 | setsockopt_ipv6_multicast_loop(r->sock_tx, 0); | |
1160 | ||
b523b241 QY |
1161 | /* Bind Rx socket to exact interface */ |
1162 | vrrp_privs.change(ZPRIVS_RAISE); | |
1163 | { | |
1164 | ret = setsockopt(r->sock_rx, SOL_SOCKET, | |
1165 | SO_BINDTODEVICE, r->vr->ifp->name, | |
1166 | strlen(r->vr->ifp->name)); | |
1167 | } | |
1168 | vrrp_privs.change(ZPRIVS_LOWER); | |
1169 | if (ret) { | |
613b45b0 | 1170 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
b523b241 | 1171 | "Failed to bind Rx socket to %s: %s", |
613b45b0 QY |
1172 | r->vr->vrid, family2str(r->family), |
1173 | r->vr->ifp->name, safe_strerror(errno)); | |
b523b241 QY |
1174 | failed = true; |
1175 | goto done; | |
1176 | } | |
b637bcd4 | 1177 | DEBUGD(&vrrp_dbg_sock, |
613b45b0 QY |
1178 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1179 | "Bound Rx socket to %s", | |
1180 | r->vr->vrid, family2str(r->family), r->vr->ifp->name); | |
b523b241 QY |
1181 | |
1182 | /* Bind Rx socket to v6 multicast address */ | |
1183 | struct sockaddr_in6 sa = {0}; | |
1184 | sa.sin6_family = AF_INET6; | |
1185 | inet_pton(AF_INET6, VRRP_MCASTV6_GROUP_STR, &sa.sin6_addr); | |
1186 | if (bind(r->sock_rx, (struct sockaddr *)&sa, sizeof(sa))) { | |
1187 | zlog_err( | |
613b45b0 QY |
1188 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1189 | "Failed to bind Rx socket to VRRP multicast group: %s", | |
b523b241 QY |
1190 | r->vr->vrid, family2str(r->family), |
1191 | safe_strerror(errno)); | |
1192 | failed = true; | |
1193 | goto done; | |
1194 | } | |
b637bcd4 | 1195 | DEBUGD(&vrrp_dbg_sock, |
613b45b0 QY |
1196 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1197 | "Bound Rx socket to VRRP multicast group", | |
b637bcd4 | 1198 | r->vr->vrid, family2str(r->family)); |
b523b241 | 1199 | |
91188ca6 | 1200 | /* Join VRRP IPv6 multicast group */ |
862f2f37 | 1201 | struct ipv6_mreq mreq; |
dad18a2f QY |
1202 | inet_pton(AF_INET6, VRRP_MCASTV6_GROUP_STR, |
1203 | &mreq.ipv6mr_multiaddr); | |
862f2f37 | 1204 | mreq.ipv6mr_interface = r->vr->ifp->ifindex; |
dad18a2f QY |
1205 | ret = setsockopt(r->sock_rx, IPPROTO_IPV6, IPV6_JOIN_GROUP, |
1206 | &mreq, sizeof(mreq)); | |
b523b241 | 1207 | if (ret < 0) { |
613b45b0 QY |
1208 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1209 | "Failed to join VRRP multicast group", | |
b523b241 QY |
1210 | r->vr->vrid, family2str(r->family)); |
1211 | failed = true; | |
1212 | goto done; | |
1213 | } | |
b637bcd4 | 1214 | DEBUGD(&vrrp_dbg_sock, |
613b45b0 QY |
1215 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1216 | "Joined VRRP multicast group", | |
b637bcd4 | 1217 | r->vr->vrid, family2str(r->family)); |
7e205b4a QY |
1218 | |
1219 | /* Set outgoing interface for advertisements */ | |
1220 | ret = setsockopt(r->sock_tx, IPPROTO_IPV6, IPV6_MULTICAST_IF, | |
1221 | &r->mvl_ifp->ifindex, sizeof(ifindex_t)); | |
1222 | if (ret < 0) { | |
1223 | zlog_warn( | |
613b45b0 | 1224 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
7e205b4a | 1225 | "Could not set %s as outgoing multicast interface", |
613b45b0 QY |
1226 | r->vr->vrid, family2str(r->family), |
1227 | r->mvl_ifp->name); | |
7e205b4a QY |
1228 | failed = true; |
1229 | goto done; | |
1230 | } | |
b637bcd4 | 1231 | DEBUGD(&vrrp_dbg_sock, |
613b45b0 | 1232 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
b637bcd4 | 1233 | "Set %s as outgoing multicast interface", |
613b45b0 | 1234 | r->vr->vrid, family2str(r->family), r->mvl_ifp->name); |
862f2f37 QY |
1235 | } |
1236 | ||
91188ca6 QY |
1237 | done: |
1238 | ret = 0; | |
1239 | if (failed) { | |
613b45b0 QY |
1240 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1241 | "Failed to initialize VRRP router", | |
91188ca6 | 1242 | r->vr->vrid, family2str(r->family)); |
1b5e2a22 | 1243 | if (r->sock_rx >= 0) { |
dad18a2f | 1244 | close(r->sock_rx); |
1b5e2a22 QY |
1245 | r->sock_rx = -1; |
1246 | } | |
1247 | if (r->sock_tx >= 0) { | |
dad18a2f | 1248 | close(r->sock_tx); |
1b5e2a22 QY |
1249 | r->sock_tx = -1; |
1250 | } | |
91188ca6 QY |
1251 | ret = -1; |
1252 | } | |
1253 | ||
1254 | return ret; | |
5435a2bf QY |
1255 | } |
1256 | ||
1257 | ||
1258 | /* State machine ----------------------------------------------------------- */ | |
1259 | ||
862f2f37 | 1260 | DEFINE_HOOK(vrrp_change_state_hook, (struct vrrp_router * r, int to), (r, to)); |
5435a2bf QY |
1261 | |
1262 | /* | |
1263 | * Handle any necessary actions during state change to MASTER state. | |
1264 | * | |
862f2f37 QY |
1265 | * r |
1266 | * VRRP Router to operate on | |
5435a2bf | 1267 | */ |
862f2f37 | 1268 | static void vrrp_change_state_master(struct vrrp_router *r) |
5435a2bf | 1269 | { |
f3fe0047 QY |
1270 | /* Enable ND Router Advertisements */ |
1271 | if (r->family == AF_INET6) | |
1272 | vrrp_zebra_radv_set(r, true); | |
c3bd894e | 1273 | |
ee5aabb6 | 1274 | /* Set protodown off */ |
c3bd894e | 1275 | vrrp_zclient_send_interface_protodown(r->mvl_ifp, false); |
ee5aabb6 QY |
1276 | |
1277 | /* | |
1278 | * If protodown is already off, we can send our stuff, otherwise we | |
1279 | * have to delay until the interface is all the way up | |
1280 | */ | |
1281 | if (if_is_operative(r->mvl_ifp)) { | |
1282 | vrrp_send_advertisement(r); | |
1283 | ||
1284 | if (r->family == AF_INET) | |
1285 | vrrp_garp_send_all(r); | |
1286 | else if (r->family == AF_INET6) | |
1287 | vrrp_ndisc_una_send_all(r); | |
1288 | } else { | |
1289 | DEBUGD(&vrrp_dbg_proto, | |
613b45b0 | 1290 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
ee5aabb6 | 1291 | "Delaying VRRP advertisement until interface is up", |
613b45b0 | 1292 | r->vr->vrid, family2str(r->family)); |
ee5aabb6 QY |
1293 | r->advert_pending = true; |
1294 | ||
1295 | if (r->family == AF_INET) { | |
1296 | DEBUGD(&vrrp_dbg_proto, | |
613b45b0 | 1297 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
ee5aabb6 | 1298 | "Delaying VRRP gratuitous ARPs until interface is up", |
613b45b0 | 1299 | r->vr->vrid, family2str(r->family)); |
ee5aabb6 QY |
1300 | r->garp_pending = true; |
1301 | } else if (r->family == AF_INET6) { | |
1302 | DEBUGD(&vrrp_dbg_proto, | |
613b45b0 | 1303 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
ee5aabb6 | 1304 | "Delaying VRRP unsolicited neighbor advertisement until interface is up", |
613b45b0 | 1305 | r->vr->vrid, family2str(r->family)); |
ee5aabb6 QY |
1306 | r->ndisc_pending = true; |
1307 | } | |
1308 | } | |
5435a2bf QY |
1309 | } |
1310 | ||
1311 | /* | |
1312 | * Handle any necessary actions during state change to BACKUP state. | |
1313 | * | |
862f2f37 | 1314 | * r |
5435a2bf QY |
1315 | * Virtual Router to operate on |
1316 | */ | |
862f2f37 | 1317 | static void vrrp_change_state_backup(struct vrrp_router *r) |
5435a2bf | 1318 | { |
f3fe0047 QY |
1319 | /* Disable ND Router Advertisements */ |
1320 | if (r->family == AF_INET6) | |
1321 | vrrp_zebra_radv_set(r, false); | |
c3bd894e | 1322 | |
45505f63 QY |
1323 | /* Disable Adver_Timer */ |
1324 | THREAD_OFF(r->t_adver_timer); | |
1325 | ||
d60b2ffd QY |
1326 | r->advert_pending = false; |
1327 | r->garp_pending = false; | |
1328 | r->ndisc_pending = false; | |
1329 | ||
c3bd894e | 1330 | vrrp_zclient_send_interface_protodown(r->mvl_ifp, true); |
5435a2bf QY |
1331 | } |
1332 | ||
1333 | /* | |
1334 | * Handle any necessary actions during state change to INITIALIZE state. | |
1335 | * | |
1336 | * This is not called for initial startup, only when transitioning from MASTER | |
1337 | * or BACKUP. | |
1338 | * | |
862f2f37 QY |
1339 | * r |
1340 | * VRRP Router to operate on | |
5435a2bf | 1341 | */ |
862f2f37 | 1342 | static void vrrp_change_state_initialize(struct vrrp_router *r) |
5435a2bf | 1343 | { |
862f2f37 QY |
1344 | r->vr->advertisement_interval = r->vr->advertisement_interval; |
1345 | r->master_adver_interval = 0; | |
1346 | vrrp_recalculate_timers(r); | |
f3fe0047 | 1347 | |
d60b2ffd QY |
1348 | r->advert_pending = false; |
1349 | r->garp_pending = false; | |
1350 | r->ndisc_pending = false; | |
1351 | ||
f3fe0047 QY |
1352 | /* Disable ND Router Advertisements */ |
1353 | if (r->family == AF_INET6) | |
1354 | vrrp_zebra_radv_set(r, false); | |
5435a2bf QY |
1355 | } |
1356 | ||
862f2f37 | 1357 | void (*vrrp_change_state_handlers[])(struct vrrp_router *vr) = { |
5435a2bf QY |
1358 | [VRRP_STATE_MASTER] = vrrp_change_state_master, |
1359 | [VRRP_STATE_BACKUP] = vrrp_change_state_backup, | |
1360 | [VRRP_STATE_INITIALIZE] = vrrp_change_state_initialize, | |
1361 | }; | |
1362 | ||
1363 | /* | |
1364 | * Change Virtual Router FSM position. Handles transitional actions and calls | |
1365 | * any subscribers to the state change hook. | |
1366 | * | |
862f2f37 | 1367 | * r |
5435a2bf QY |
1368 | * Virtual Router for which to change state |
1369 | * | |
1370 | * to | |
1371 | * State to change to | |
1372 | */ | |
862f2f37 | 1373 | static void vrrp_change_state(struct vrrp_router *r, int to) |
5435a2bf | 1374 | { |
6287cefe QY |
1375 | if (r->fsm.state == to) |
1376 | return; | |
1377 | ||
5435a2bf | 1378 | /* Call our handlers, then any subscribers */ |
862f2f37 QY |
1379 | vrrp_change_state_handlers[to](r); |
1380 | hook_call(vrrp_change_state_hook, r, to); | |
613b45b0 QY |
1381 | zlog_info(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM "%s -> %s", |
1382 | r->vr->vrid, family2str(r->family), | |
862f2f37 QY |
1383 | vrrp_state_names[r->fsm.state], vrrp_state_names[to]); |
1384 | r->fsm.state = to; | |
6332c77f QY |
1385 | |
1386 | ++r->stats.trans_cnt; | |
5435a2bf QY |
1387 | } |
1388 | ||
1389 | /* | |
1390 | * Called when Adver_Timer expires. | |
1391 | */ | |
1392 | static int vrrp_adver_timer_expire(struct thread *thread) | |
1393 | { | |
862f2f37 | 1394 | struct vrrp_router *r = thread->arg; |
5435a2bf | 1395 | |
b637bcd4 | 1396 | DEBUGD(&vrrp_dbg_proto, |
613b45b0 QY |
1397 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1398 | "Adver_Timer expired", | |
1399 | r->vr->vrid, family2str(r->family)); | |
4ec94408 | 1400 | |
862f2f37 | 1401 | if (r->fsm.state == VRRP_STATE_MASTER) { |
3e7a4043 | 1402 | /* Send an ADVERTISEMENT */ |
862f2f37 | 1403 | vrrp_send_advertisement(r); |
5435a2bf | 1404 | |
3e7a4043 | 1405 | /* Reset the Adver_Timer to Advertisement_Interval */ |
862f2f37 QY |
1406 | thread_add_timer_msec(master, vrrp_adver_timer_expire, r, |
1407 | r->vr->advertisement_interval * 10, | |
1408 | &r->t_adver_timer); | |
3e7a4043 | 1409 | } else { |
613b45b0 | 1410 | zlog_err(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
b637bcd4 | 1411 | "Adver_Timer expired in state '%s'; this is a bug", |
613b45b0 QY |
1412 | r->vr->vrid, family2str(r->family), |
1413 | vrrp_state_names[r->fsm.state]); | |
5435a2bf | 1414 | } |
3e7a4043 | 1415 | |
5435a2bf QY |
1416 | return 0; |
1417 | } | |
1418 | ||
1419 | /* | |
4ec94408 | 1420 | * Called when Master_Down_Timer expires. |
5435a2bf QY |
1421 | */ |
1422 | static int vrrp_master_down_timer_expire(struct thread *thread) | |
1423 | { | |
862f2f37 | 1424 | struct vrrp_router *r = thread->arg; |
4ec94408 | 1425 | |
613b45b0 QY |
1426 | zlog_info(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1427 | "Master_Down_Timer expired", | |
1428 | r->vr->vrid, family2str(r->family)); | |
5435a2bf | 1429 | |
c7e3b83d QY |
1430 | thread_add_timer_msec(master, vrrp_adver_timer_expire, r, |
1431 | r->vr->advertisement_interval * 10, | |
1432 | &r->t_adver_timer); | |
1433 | vrrp_change_state(r, VRRP_STATE_MASTER); | |
1434 | ||
5435a2bf QY |
1435 | return 0; |
1436 | } | |
1437 | ||
1438 | /* | |
1439 | * Event handler for Startup event. | |
1440 | * | |
1441 | * Creates sockets, sends advertisements and ARP requests, starts timers, | |
1d21789e QY |
1442 | * and transitions the Virtual Router to either Master or Backup states. |
1443 | * | |
1444 | * This function will also initialize the program's global ARP subsystem if it | |
1445 | * has not yet been initialized. | |
5435a2bf | 1446 | * |
862f2f37 QY |
1447 | * r |
1448 | * VRRP Router on which to apply Startup event | |
1d21789e QY |
1449 | * |
1450 | * Returns: | |
1451 | * < 0 if the session socket could not be created, or the state is not | |
1452 | * Initialize | |
1453 | * 0 on success | |
5435a2bf | 1454 | */ |
862f2f37 | 1455 | static int vrrp_startup(struct vrrp_router *r) |
5435a2bf | 1456 | { |
1d21789e | 1457 | /* May only be called when the state is Initialize */ |
862f2f37 | 1458 | if (r->fsm.state != VRRP_STATE_INITIALIZE) |
1d21789e QY |
1459 | return -1; |
1460 | ||
7e205b4a | 1461 | /* Must have a valid macvlan interface available */ |
85467974 | 1462 | if (r->mvl_ifp == NULL && !vrrp_attach_interface(r)) { |
613b45b0 QY |
1463 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1464 | "No appropriate interface found", | |
7e205b4a QY |
1465 | r->vr->vrid, family2str(r->family)); |
1466 | return -1; | |
1467 | } | |
1468 | ||
40744000 | 1469 | /* Initialize global gratuitous ARP socket if necessary */ |
862f2f37 | 1470 | if (r->family == AF_INET && !vrrp_garp_is_init()) |
40744000 | 1471 | vrrp_garp_init(); |
4f52e9a6 QY |
1472 | if (r->family == AF_INET6 && !vrrp_ndisc_is_init()) |
1473 | vrrp_ndisc_init(); | |
40744000 | 1474 | |
5435a2bf | 1475 | /* Create socket */ |
dad18a2f | 1476 | if (r->sock_rx < 0 || r->sock_tx < 0) { |
862f2f37 | 1477 | int ret = vrrp_socket(r); |
dad18a2f | 1478 | if (ret < 0 || r->sock_tx < 0 || r->sock_rx < 0) |
862f2f37 QY |
1479 | return ret; |
1480 | } | |
5435a2bf QY |
1481 | |
1482 | /* Schedule listener */ | |
dad18a2f | 1483 | thread_add_read(master, vrrp_read, r, r->sock_rx, &r->t_read); |
5435a2bf | 1484 | |
91188ca6 | 1485 | /* Configure effective priority */ |
862f2f37 QY |
1486 | struct ipaddr *primary = (struct ipaddr *)listhead(r->addrs)->data; |
1487 | ||
1488 | char ipbuf[INET6_ADDRSTRLEN]; | |
1489 | inet_ntop(r->family, &primary->ip.addr, ipbuf, sizeof(ipbuf)); | |
1490 | ||
2f1fc30f QY |
1491 | if (r->vr->priority == VRRP_PRIO_MASTER |
1492 | || vrrp_is_owner(r->vr->ifp, primary)) { | |
862f2f37 QY |
1493 | r->priority = VRRP_PRIO_MASTER; |
1494 | vrrp_recalculate_timers(r); | |
1495 | ||
5d3730c5 | 1496 | zlog_info( |
613b45b0 | 1497 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
2f1fc30f | 1498 | "%s has priority set to 255 or owns primary Virtual Router IP %s; electing self as Master", |
613b45b0 QY |
1499 | r->vr->vrid, family2str(r->family), r->vr->ifp->name, |
1500 | ipbuf); | |
5d3730c5 QY |
1501 | } |
1502 | ||
862f2f37 | 1503 | if (r->priority == VRRP_PRIO_MASTER) { |
862f2f37 QY |
1504 | thread_add_timer_msec(master, vrrp_adver_timer_expire, r, |
1505 | r->vr->advertisement_interval * 10, | |
1506 | &r->t_adver_timer); | |
1507 | vrrp_change_state(r, VRRP_STATE_MASTER); | |
5435a2bf | 1508 | } else { |
862f2f37 QY |
1509 | r->master_adver_interval = r->vr->advertisement_interval; |
1510 | vrrp_recalculate_timers(r); | |
1511 | thread_add_timer_msec(master, vrrp_master_down_timer_expire, r, | |
1512 | r->master_down_interval * 10, | |
1513 | &r->t_master_down_timer); | |
1514 | vrrp_change_state(r, VRRP_STATE_BACKUP); | |
5435a2bf | 1515 | } |
a8144d7f | 1516 | |
862f2f37 QY |
1517 | r->is_active = true; |
1518 | ||
a8144d7f | 1519 | return 0; |
5435a2bf QY |
1520 | } |
1521 | ||
1d21789e QY |
1522 | /* |
1523 | * Shuts down a Virtual Router and transitions it to Initialize. | |
1524 | * | |
1525 | * This call must be idempotent; it is safe to call multiple times on the same | |
862f2f37 | 1526 | * VRRP Router. |
1d21789e | 1527 | */ |
862f2f37 | 1528 | static int vrrp_shutdown(struct vrrp_router *r) |
5435a2bf | 1529 | { |
45505f63 QY |
1530 | uint8_t saved_prio; |
1531 | ||
862f2f37 QY |
1532 | switch (r->fsm.state) { |
1533 | case VRRP_STATE_MASTER: | |
862f2f37 | 1534 | /* Send an ADVERTISEMENT with Priority = 0 */ |
45505f63 | 1535 | saved_prio = r->priority; |
862f2f37 QY |
1536 | r->priority = 0; |
1537 | vrrp_send_advertisement(r); | |
1538 | r->priority = saved_prio; | |
1539 | break; | |
1540 | case VRRP_STATE_BACKUP: | |
862f2f37 QY |
1541 | break; |
1542 | case VRRP_STATE_INITIALIZE: | |
b637bcd4 | 1543 | DEBUGD(&vrrp_dbg_proto, |
613b45b0 | 1544 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
b637bcd4 | 1545 | "Received '%s' event in '%s' state; ignoring", |
613b45b0 QY |
1546 | r->vr->vrid, family2str(r->family), |
1547 | vrrp_event_names[VRRP_EVENT_SHUTDOWN], | |
b637bcd4 | 1548 | vrrp_state_names[VRRP_STATE_INITIALIZE]); |
862f2f37 | 1549 | break; |
3e7a4043 QY |
1550 | } |
1551 | ||
45505f63 QY |
1552 | /* Cancel all timers */ |
1553 | THREAD_OFF(r->t_adver_timer); | |
1554 | THREAD_OFF(r->t_master_down_timer); | |
a90edf08 QY |
1555 | THREAD_OFF(r->t_read); |
1556 | THREAD_OFF(r->t_write); | |
45505f63 | 1557 | |
4d2ea6bf QY |
1558 | /* Protodown macvlan */ |
1559 | vrrp_zclient_send_interface_protodown(r->mvl_ifp, true); | |
1560 | ||
b7dc1bbb QY |
1561 | if (r->sock_rx > 0) { |
1562 | close(r->sock_rx); | |
1563 | r->sock_rx = -1; | |
1564 | } | |
1565 | if (r->sock_tx > 0) { | |
1566 | close(r->sock_tx); | |
1567 | r->sock_tx = -1; | |
1568 | } | |
1569 | ||
862f2f37 | 1570 | vrrp_change_state(r, VRRP_STATE_INITIALIZE); |
1d21789e | 1571 | |
73b5cb19 QY |
1572 | r->is_active = false; |
1573 | ||
a8144d7f | 1574 | return 0; |
5435a2bf QY |
1575 | } |
1576 | ||
862f2f37 | 1577 | static int (*vrrp_event_handlers[])(struct vrrp_router *r) = { |
5435a2bf QY |
1578 | [VRRP_EVENT_STARTUP] = vrrp_startup, |
1579 | [VRRP_EVENT_SHUTDOWN] = vrrp_shutdown, | |
1580 | }; | |
1581 | ||
1582 | /* | |
862f2f37 | 1583 | * Spawn a VRRP FSM event on a VRRP Router. |
5435a2bf QY |
1584 | * |
1585 | * vr | |
862f2f37 | 1586 | * VRRP Router on which to spawn event |
5435a2bf QY |
1587 | * |
1588 | * event | |
1589 | * The event to spawn | |
27fd8827 QY |
1590 | * |
1591 | * Returns: | |
1592 | * -1 on failure | |
1593 | * 0 otherwise | |
5435a2bf | 1594 | */ |
862f2f37 | 1595 | int vrrp_event(struct vrrp_router *r, int event) |
5435a2bf | 1596 | { |
613b45b0 QY |
1597 | zlog_info(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM "'%s' event", |
1598 | r->vr->vrid, family2str(r->family), vrrp_event_names[event]); | |
862f2f37 | 1599 | return vrrp_event_handlers[event](r); |
5435a2bf QY |
1600 | } |
1601 | ||
1602 | ||
27fd8827 QY |
1603 | /* Autoconfig -------------------------------------------------------------- */ |
1604 | ||
1605 | /* | |
1606 | * Set the configured addresses for this VRRP instance to exactly the addresses | |
1607 | * present on its macvlan subinterface(s). | |
1608 | * | |
1609 | * vr | |
1610 | * VRRP router to act on | |
1611 | */ | |
ac1429b9 | 1612 | static void vrrp_autoconfig_autoaddrupdate(struct vrrp_router *r) |
27fd8827 | 1613 | { |
27fd8827 QY |
1614 | struct listnode *ln; |
1615 | struct connected *c = NULL; | |
ac1429b9 | 1616 | bool is_v6_ll; |
00984df7 | 1617 | char ipbuf[INET6_ADDRSTRLEN]; |
27fd8827 | 1618 | |
ac1429b9 QY |
1619 | if (!r->mvl_ifp) |
1620 | return; | |
27fd8827 | 1621 | |
ac1429b9 | 1622 | DEBUGD(&vrrp_dbg_auto, |
613b45b0 QY |
1623 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1624 | "Setting Virtual IP list to match IPv4 addresses on %s", | |
ac1429b9 QY |
1625 | r->vr->vrid, family2str(r->family), r->mvl_ifp->name); |
1626 | for (ALL_LIST_ELEMENTS_RO(r->mvl_ifp->connected, ln, c)) { | |
1627 | is_v6_ll = (c->address->family == AF_INET6 | |
1628 | && IN6_IS_ADDR_LINKLOCAL(&c->address->u.prefix6)); | |
1629 | if (c->address->family == r->family && !is_v6_ll) { | |
1630 | inet_ntop(r->family, &c->address->u.prefix, ipbuf, | |
1631 | sizeof(ipbuf)); | |
1632 | DEBUGD(&vrrp_dbg_auto, | |
613b45b0 QY |
1633 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1634 | "Adding %s", | |
1635 | r->vr->vrid, family2str(r->family), ipbuf); | |
ac1429b9 QY |
1636 | if (r->family == AF_INET) |
1637 | vrrp_add_ipv4(r->vr, c->address->u.prefix4); | |
1638 | else | |
1639 | vrrp_add_ipv6(r->vr, c->address->u.prefix6); | |
1640 | } | |
b637bcd4 | 1641 | } |
27fd8827 | 1642 | |
ac1429b9 | 1643 | vrrp_check_start(r->vr); |
6e93585e | 1644 | |
ac1429b9 | 1645 | if (r->addrs->count == 0 && r->fsm.state != VRRP_STATE_INITIALIZE) { |
b637bcd4 | 1646 | DEBUGD(&vrrp_dbg_auto, |
613b45b0 QY |
1647 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1648 | "Virtual IP list is empty; shutting down", | |
ac1429b9 QY |
1649 | r->vr->vrid, family2str(r->family)); |
1650 | vrrp_event(r, VRRP_EVENT_SHUTDOWN); | |
b637bcd4 | 1651 | } |
27fd8827 | 1652 | } |
5435a2bf | 1653 | |
53e60e5c QY |
1654 | static struct vrrp_vrouter * |
1655 | vrrp_autoconfig_autocreate(struct interface *mvl_ifp) | |
1656 | { | |
1657 | struct interface *p; | |
1658 | struct vrrp_vrouter *vr; | |
1659 | ||
1660 | p = if_lookup_by_index(mvl_ifp->link_ifindex, VRF_DEFAULT); | |
27fd8827 QY |
1661 | |
1662 | if (!p) | |
1663 | return NULL; | |
1664 | ||
53e60e5c | 1665 | uint8_t vrid = mvl_ifp->hw_addr[5]; |
613b45b0 | 1666 | uint8_t fam = mvl_ifp->hw_addr[4]; |
53e60e5c | 1667 | |
00984df7 | 1668 | DEBUGD(&vrrp_dbg_auto, |
613b45b0 QY |
1669 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1670 | "Autoconfiguring VRRP on %s", | |
1671 | vrid, family2str(fam), p->name); | |
53e60e5c | 1672 | |
53e60e5c QY |
1673 | vr = vrrp_vrouter_create(p, vrid, vrrp_autoconfig_version); |
1674 | ||
27fd8827 | 1675 | if (!vr) { |
613b45b0 QY |
1676 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1677 | "Failed to autoconfigure VRRP on %s", | |
1678 | vrid, family2str(fam), p->name); | |
53e60e5c | 1679 | return NULL; |
27fd8827 | 1680 | } |
53e60e5c | 1681 | |
d37281cb QY |
1682 | vr->autoconf = true; |
1683 | ||
1684 | /* | |
1685 | * If these interfaces are protodown on, we need to un-protodown them | |
1686 | * in order to get Zebra to send us their addresses so we can | |
1687 | * autoconfigure them. | |
1688 | */ | |
1689 | if (vr->v4->mvl_ifp) | |
1690 | vrrp_zclient_send_interface_protodown(vr->v4->mvl_ifp, false); | |
1691 | if (vr->v6->mvl_ifp) | |
1692 | vrrp_zclient_send_interface_protodown(vr->v6->mvl_ifp, false); | |
1693 | ||
1694 | /* If they're not, we can go ahead and add the addresses we have */ | |
ac1429b9 QY |
1695 | vrrp_autoconfig_autoaddrupdate(vr->v4); |
1696 | vrrp_autoconfig_autoaddrupdate(vr->v6); | |
53e60e5c | 1697 | |
53e60e5c QY |
1698 | return vr; |
1699 | } | |
1700 | ||
6e93585e QY |
1701 | /* |
1702 | * Callback to notify autoconfig of interface add. | |
1703 | * | |
1704 | * If the interface is a VRRP-compatible device, and there is no existing VRRP | |
1705 | * router running on it, one is created. All addresses on the interface are | |
1706 | * added to the router. | |
1707 | * | |
1708 | * ifp | |
1709 | * Interface to operate on | |
1710 | * | |
1711 | * Returns: | |
1712 | * -1 on failure | |
1713 | * 0 otherwise | |
1714 | */ | |
1715 | static int vrrp_autoconfig_if_add(struct interface *ifp) | |
27fd8827 | 1716 | { |
2198a5bb QY |
1717 | bool created = false; |
1718 | struct vrrp_vrouter *vr; | |
1719 | ||
27fd8827 QY |
1720 | if (!vrrp_autoconfig_is_on) |
1721 | return 0; | |
1722 | ||
27fd8827 QY |
1723 | if (!ifp || !ifp->link_ifindex || !vrrp_ifp_has_vrrp_mac(ifp)) |
1724 | return -1; | |
1725 | ||
6e93585e | 1726 | vr = vrrp_lookup_by_if_mvl(ifp); |
27fd8827 | 1727 | |
2198a5bb | 1728 | if (!vr) { |
27fd8827 | 1729 | vr = vrrp_autoconfig_autocreate(ifp); |
d37281cb | 1730 | created = true; |
2198a5bb | 1731 | } |
27fd8827 | 1732 | |
d37281cb | 1733 | if (!vr || vr->autoconf == false) |
27fd8827 | 1734 | return 0; |
d37281cb QY |
1735 | |
1736 | if (!created) { | |
1737 | /* | |
1738 | * We didn't create it, but it has already been autoconfigured. | |
1739 | * Try to attach this interface to the existing instance. | |
1740 | */ | |
1741 | if (!vr->v4->mvl_ifp) { | |
1742 | vrrp_attach_interface(vr->v4); | |
1743 | /* If we just attached it, make sure it's turned on */ | |
1744 | if (vr->v4->mvl_ifp) { | |
1745 | vrrp_zclient_send_interface_protodown( | |
1746 | vr->v4->mvl_ifp, false); | |
1747 | /* | |
1748 | * If it's already up, we can go ahead and add | |
1749 | * the addresses we have | |
1750 | */ | |
1751 | vrrp_autoconfig_autoaddrupdate(vr->v4); | |
1752 | } | |
1753 | } | |
1754 | if (!vr->v6->mvl_ifp) { | |
1755 | vrrp_attach_interface(vr->v6); | |
1756 | /* If we just attached it, make sure it's turned on */ | |
1757 | if (vr->v6->mvl_ifp) { | |
1758 | vrrp_zclient_send_interface_protodown( | |
1759 | vr->v6->mvl_ifp, false); | |
1760 | /* | |
1761 | * If it's already up, we can go ahead and add | |
1762 | * the addresses we have | |
1763 | */ | |
1764 | vrrp_autoconfig_autoaddrupdate(vr->v6); | |
1765 | } | |
1766 | } | |
27fd8827 QY |
1767 | } |
1768 | ||
1769 | return 0; | |
1770 | } | |
1771 | ||
6e93585e QY |
1772 | /* |
1773 | * Callback to notify autoconfig of interface delete. | |
1774 | * | |
1775 | * If the interface is a VRRP-compatible device, and a VRRP router is running | |
1776 | * on it, and that VRRP router was automatically configured, it will be | |
1777 | * deleted. If that was the last router for the corresponding VRID (i.e., if | |
1778 | * this interface was a v4 VRRP interface and no v6 router is configured for | |
1779 | * the same VRID) then the entire virtual router is deleted. | |
1780 | * | |
1781 | * ifp | |
1782 | * Interface to operate on | |
1783 | * | |
1784 | * Returns: | |
1785 | * -1 on failure | |
1786 | * 0 otherwise | |
1787 | */ | |
1788 | static int vrrp_autoconfig_if_del(struct interface *ifp) | |
27fd8827 QY |
1789 | { |
1790 | if (!vrrp_autoconfig_is_on) | |
1791 | return 0; | |
1792 | ||
6e93585e QY |
1793 | struct vrrp_vrouter *vr; |
1794 | struct listnode *ln; | |
1795 | struct list *vrs; | |
27fd8827 | 1796 | |
6e93585e | 1797 | vrs = vrrp_lookup_by_if_any(ifp); |
27fd8827 | 1798 | |
6e93585e QY |
1799 | for (ALL_LIST_ELEMENTS_RO(vrs, ln, vr)) |
1800 | if (vr->autoconf | |
1801 | && (!vr->ifp || (!vr->v4->mvl_ifp && !vr->v6->mvl_ifp))) { | |
b637bcd4 QY |
1802 | DEBUGD(&vrrp_dbg_auto, |
1803 | VRRP_LOGPFX VRRP_LOGPFX_VRID | |
6e93585e QY |
1804 | "All VRRP interfaces for instance deleted; destroying autoconfigured VRRP router", |
1805 | vr->vrid); | |
1806 | vrrp_vrouter_destroy(vr); | |
b637bcd4 | 1807 | } |
27fd8827 | 1808 | |
6e93585e | 1809 | list_delete(&vrs); |
27fd8827 QY |
1810 | |
1811 | return 0; | |
1812 | } | |
1813 | ||
6e93585e QY |
1814 | /* |
1815 | * Callback to notify autoconfig of interface up. | |
1816 | * | |
8bceffc7 QY |
1817 | * Creates VRRP instance on interface if it does not exist. Otherwise does |
1818 | * nothing. | |
6e93585e QY |
1819 | * |
1820 | * ifp | |
1821 | * Interface to operate on | |
1822 | * | |
1823 | * Returns: | |
1824 | * -1 on failure | |
1825 | * 0 otherwise | |
1826 | */ | |
1827 | static int vrrp_autoconfig_if_up(struct interface *ifp) | |
53e60e5c | 1828 | { |
27fd8827 QY |
1829 | if (!vrrp_autoconfig_is_on) |
1830 | return 0; | |
1831 | ||
6e93585e | 1832 | struct vrrp_vrouter *vr = vrrp_lookup_by_if_mvl(ifp); |
27fd8827 QY |
1833 | |
1834 | if (vr && !vr->autoconf) | |
1835 | return 0; | |
1836 | ||
1837 | if (!vr) { | |
1838 | vrrp_autoconfig_if_add(ifp); | |
53e60e5c QY |
1839 | return 0; |
1840 | } | |
1841 | ||
27fd8827 QY |
1842 | return 0; |
1843 | } | |
1844 | ||
6e93585e QY |
1845 | /* |
1846 | * Callback to notify autoconfig of interface down. | |
1847 | * | |
1848 | * Does nothing. An interface down event is accompanied by address deletion | |
1849 | * events for all the addresses on the interface; if an autoconfigured VRRP | |
1850 | * router exists on this interface, then it will have all its addresses deleted | |
1851 | * and end up in Initialize. | |
1852 | * | |
1853 | * ifp | |
1854 | * Interface to operate on | |
1855 | * | |
1856 | * Returns: | |
1857 | * -1 on failure | |
1858 | * 0 otherwise | |
1859 | */ | |
1860 | static int vrrp_autoconfig_if_down(struct interface *ifp) | |
27fd8827 QY |
1861 | { |
1862 | if (!vrrp_autoconfig_is_on) | |
1863 | return 0; | |
1864 | ||
1865 | return 0; | |
1866 | } | |
1867 | ||
6e93585e QY |
1868 | /* |
1869 | * Callback to notify autoconfig of a new interface address. | |
1870 | * | |
1871 | * If a VRRP router exists on this interface, its address list is updated to | |
1872 | * match the new address list. If no addresses remain, a Shutdown event is | |
1873 | * issued to the VRRP router. | |
1874 | * | |
1875 | * ifp | |
1876 | * Interface to operate on | |
1877 | * | |
1878 | * Returns: | |
1879 | * -1 on failure | |
1880 | * 0 otherwise | |
1881 | * | |
1882 | */ | |
1883 | static int vrrp_autoconfig_if_address_add(struct interface *ifp) | |
27fd8827 QY |
1884 | { |
1885 | if (!vrrp_autoconfig_is_on) | |
1886 | return 0; | |
1887 | ||
6e93585e | 1888 | struct vrrp_vrouter *vr = vrrp_lookup_by_if_mvl(ifp); |
27fd8827 | 1889 | |
ac1429b9 QY |
1890 | if (vr && vr->autoconf) { |
1891 | if (vr->v4->mvl_ifp == ifp) | |
1892 | vrrp_autoconfig_autoaddrupdate(vr->v4); | |
1893 | else if (vr->v6->mvl_ifp == ifp) | |
1894 | vrrp_autoconfig_autoaddrupdate(vr->v6); | |
1895 | } | |
27fd8827 QY |
1896 | |
1897 | return 0; | |
1898 | } | |
1899 | ||
6e93585e QY |
1900 | /* |
1901 | * Callback to notify autoconfig of a removed interface address. | |
1902 | * | |
1903 | * If a VRRP router exists on this interface, its address list is updated to | |
1904 | * match the new address list. If no addresses remain, a Shutdown event is | |
1905 | * issued to the VRRP router. | |
1906 | * | |
1907 | * ifp | |
1908 | * Interface to operate on | |
1909 | * | |
1910 | * Returns: | |
1911 | * -1 on failure | |
1912 | * 0 otherwise | |
1913 | * | |
1914 | */ | |
1915 | static int vrrp_autoconfig_if_address_del(struct interface *ifp) | |
27fd8827 QY |
1916 | { |
1917 | if (!vrrp_autoconfig_is_on) | |
1918 | return 0; | |
1919 | ||
6e93585e | 1920 | struct vrrp_vrouter *vr = vrrp_lookup_by_if_mvl(ifp); |
27fd8827 | 1921 | |
ac1429b9 QY |
1922 | if (vr && vr->autoconf) { |
1923 | if (vr->v4->mvl_ifp == ifp) | |
1924 | vrrp_autoconfig_autoaddrupdate(vr->v4); | |
1925 | else if (vr->v6->mvl_ifp == ifp) | |
1926 | vrrp_autoconfig_autoaddrupdate(vr->v6); | |
1927 | } | |
27fd8827 QY |
1928 | |
1929 | return 0; | |
1930 | } | |
1931 | ||
1932 | int vrrp_autoconfig(void) | |
1933 | { | |
1934 | if (!vrrp_autoconfig_is_on) | |
1935 | return 0; | |
1936 | ||
53e60e5c | 1937 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
27fd8827 | 1938 | struct interface *ifp; |
53e60e5c QY |
1939 | |
1940 | FOR_ALL_INTERFACES (vrf, ifp) | |
27fd8827 | 1941 | vrrp_autoconfig_if_add(ifp); |
53e60e5c QY |
1942 | |
1943 | return 0; | |
1944 | } | |
1945 | ||
27fd8827 QY |
1946 | void vrrp_autoconfig_on(int version) |
1947 | { | |
1948 | vrrp_autoconfig_is_on = true; | |
1949 | vrrp_autoconfig_version = version; | |
1950 | ||
1951 | vrrp_autoconfig(); | |
1952 | } | |
1953 | ||
1954 | void vrrp_autoconfig_off(void) | |
1955 | { | |
1956 | vrrp_autoconfig_is_on = false; | |
1957 | ||
1958 | struct list *ll = hash_to_list(vrrp_vrouters_hash); | |
1959 | ||
1960 | struct listnode *ln; | |
1961 | struct vrrp_vrouter *vr; | |
1962 | ||
1963 | for (ALL_LIST_ELEMENTS_RO(ll, ln, vr)) | |
1964 | if (vr->autoconf) | |
1965 | vrrp_vrouter_destroy(vr); | |
1966 | ||
1967 | list_delete(&ll); | |
1968 | } | |
1969 | ||
6e93585e QY |
1970 | /* Interface tracking ------------------------------------------------------ */ |
1971 | ||
1972 | /* | |
1973 | * Bind any pending interfaces. | |
1974 | * | |
1975 | * mvl_ifp | |
1976 | * macvlan interface that some VRRP instances might want to bind to | |
1977 | */ | |
1978 | static void vrrp_bind_pending(struct interface *mvl_ifp) | |
1979 | { | |
1980 | struct vrrp_vrouter *vr; | |
1981 | ||
1982 | vr = vrrp_lookup_by_if_mvl(mvl_ifp); | |
1983 | ||
1984 | if (vr) { | |
1985 | if (mvl_ifp->hw_addr[4] == 0x01 && !vr->v4->mvl_ifp) | |
1986 | vrrp_attach_interface(vr->v4); | |
1987 | else if (mvl_ifp->hw_addr[4] == 0x02 && !vr->v6->mvl_ifp) | |
1988 | vrrp_attach_interface(vr->v6); | |
1989 | } | |
1990 | } | |
1991 | ||
1992 | void vrrp_if_up(struct interface *ifp) | |
1993 | { | |
1994 | struct vrrp_vrouter *vr; | |
1995 | struct listnode *ln; | |
1996 | struct list *vrs; | |
1997 | ||
1998 | vrrp_bind_pending(ifp); | |
1999 | ||
2000 | vrs = vrrp_lookup_by_if_any(ifp); | |
2001 | ||
d60b2ffd | 2002 | for (ALL_LIST_ELEMENTS_RO(vrs, ln, vr)) { |
6e93585e QY |
2003 | vrrp_check_start(vr); |
2004 | ||
ee5aabb6 QY |
2005 | if (!if_is_operative(ifp)) |
2006 | continue; | |
2007 | ||
d60b2ffd QY |
2008 | /* |
2009 | * Handle the situation in which we performed a state | |
2010 | * transition on this VRRP router but needed to wait for the | |
2011 | * macvlan interface to come up to perform some actions | |
2012 | */ | |
2013 | if (ifp == vr->v4->mvl_ifp) { | |
2014 | if (vr->v4->advert_pending) { | |
2015 | DEBUGD(&vrrp_dbg_proto, | |
2016 | VRRP_LOGPFX VRRP_LOGPFX_VRID | |
613b45b0 | 2017 | VRRP_LOGPFX_FAM |
d60b2ffd | 2018 | "Interface up; sending pending advertisement", |
613b45b0 | 2019 | vr->vrid, family2str(vr->v4->family)); |
d60b2ffd QY |
2020 | vrrp_send_advertisement(vr->v4); |
2021 | vr->v4->advert_pending = false; | |
2022 | } | |
2023 | if (vr->v4->garp_pending) { | |
2024 | DEBUGD(&vrrp_dbg_proto, | |
2025 | VRRP_LOGPFX VRRP_LOGPFX_VRID | |
613b45b0 | 2026 | VRRP_LOGPFX_FAM |
d60b2ffd | 2027 | "Interface up; sending pending gratuitous ARP", |
613b45b0 | 2028 | vr->vrid, family2str(vr->v4->family)); |
d60b2ffd QY |
2029 | vrrp_garp_send_all(vr->v4); |
2030 | vr->v4->garp_pending = false; | |
2031 | } | |
2032 | } | |
2033 | if (ifp == vr->v6->mvl_ifp) { | |
2034 | if (vr->v6->advert_pending) { | |
2035 | DEBUGD(&vrrp_dbg_proto, | |
2036 | VRRP_LOGPFX VRRP_LOGPFX_VRID | |
613b45b0 | 2037 | VRRP_LOGPFX_FAM |
d60b2ffd | 2038 | "Interface up; sending pending advertisement", |
613b45b0 | 2039 | vr->vrid, family2str(vr->v6->family)); |
d60b2ffd QY |
2040 | vrrp_send_advertisement(vr->v6); |
2041 | vr->v6->advert_pending = false; | |
2042 | } | |
2043 | if (vr->v6->ndisc_pending) { | |
2044 | DEBUGD(&vrrp_dbg_proto, | |
2045 | VRRP_LOGPFX VRRP_LOGPFX_VRID | |
613b45b0 | 2046 | VRRP_LOGPFX_FAM |
d60b2ffd | 2047 | "Interface up; sending pending Unsolicited Neighbor Advertisement", |
613b45b0 | 2048 | vr->vrid, family2str(vr->v6->family)); |
d60b2ffd QY |
2049 | vrrp_ndisc_una_send_all(vr->v6); |
2050 | vr->v6->ndisc_pending = false; | |
2051 | } | |
2052 | } | |
2053 | } | |
2054 | ||
6e93585e QY |
2055 | list_delete(&vrs); |
2056 | ||
2057 | vrrp_autoconfig_if_up(ifp); | |
2058 | } | |
2059 | ||
2060 | void vrrp_if_down(struct interface *ifp) | |
2061 | { | |
2062 | struct vrrp_vrouter *vr; | |
2063 | struct listnode *ln; | |
2064 | struct list *vrs; | |
2065 | ||
2066 | vrs = vrrp_lookup_by_if_any(ifp); | |
2067 | ||
2068 | for (ALL_LIST_ELEMENTS_RO(vrs, ln, vr)) { | |
c4485ad5 QY |
2069 | if (vr->ifp == ifp || vr->v4->mvl_ifp == ifp |
2070 | || vr->v6->mvl_ifp == ifp) { | |
2071 | DEBUGD(&vrrp_dbg_auto, | |
2072 | VRRP_LOGPFX VRRP_LOGPFX_VRID "Interface %s down", | |
2073 | vr->vrid, ifp->name); | |
6e93585e QY |
2074 | } |
2075 | } | |
2076 | ||
2077 | list_delete(&vrs); | |
2078 | ||
2079 | vrrp_autoconfig_if_down(ifp); | |
2080 | } | |
2081 | ||
2082 | void vrrp_if_add(struct interface *ifp) | |
2083 | { | |
2084 | vrrp_bind_pending(ifp); | |
2085 | ||
2086 | /* thanks, zebra */ | |
2087 | if (CHECK_FLAG(ifp->flags, IFF_UP)) | |
2088 | vrrp_if_up(ifp); | |
2089 | ||
2090 | vrrp_autoconfig_if_add(ifp); | |
2091 | } | |
2092 | ||
2093 | void vrrp_if_del(struct interface *ifp) | |
2094 | { | |
2095 | struct listnode *ln; | |
2096 | struct vrrp_vrouter *vr; | |
2097 | struct list *vrs = vrrp_lookup_by_if_any(ifp); | |
2098 | ||
2099 | vrrp_if_down(ifp); | |
2100 | ||
2101 | for (ALL_LIST_ELEMENTS_RO(vrs, ln, vr)) { | |
62475ecd QY |
2102 | if ((vr->v4->mvl_ifp == ifp || vr->ifp == ifp) |
2103 | && vr->v4->fsm.state != VRRP_STATE_INITIALIZE) { | |
2104 | vrrp_event(vr->v4, VRRP_EVENT_SHUTDOWN); | |
6e93585e | 2105 | vr->v4->mvl_ifp = NULL; |
62475ecd QY |
2106 | } else if ((vr->v6->mvl_ifp == ifp || vr->ifp == ifp) |
2107 | && vr->v6->fsm.state != VRRP_STATE_INITIALIZE) { | |
2108 | vrrp_event(vr->v6, VRRP_EVENT_SHUTDOWN); | |
6e93585e | 2109 | vr->v6->mvl_ifp = NULL; |
62475ecd | 2110 | } |
6e93585e QY |
2111 | } |
2112 | ||
2113 | list_delete(&vrs); | |
2114 | ||
2115 | vrrp_autoconfig_if_del(ifp); | |
2116 | } | |
2117 | ||
2118 | void vrrp_if_address_add(struct interface *ifp) | |
2119 | { | |
2120 | struct vrrp_vrouter *vr; | |
2121 | struct listnode *ln; | |
2122 | struct list *vrs; | |
2123 | ||
2124 | /* | |
2125 | * We have to do a wide search here, because we need to know when a v6 | |
2126 | * macvlan device gets a new address. This is because the macvlan link | |
2127 | * local is used as the source address for v6 advertisements, and hence | |
2128 | * "do I have a link local" constitutes an activation condition for v6 | |
2129 | * virtual routers. | |
2130 | */ | |
2131 | vrs = vrrp_lookup_by_if_any(ifp); | |
2132 | ||
2133 | for (ALL_LIST_ELEMENTS_RO(vrs, ln, vr)) | |
2134 | vrrp_check_start(vr); | |
2135 | ||
2136 | list_delete(&vrs); | |
2137 | ||
2138 | vrrp_autoconfig_if_address_add(ifp); | |
2139 | } | |
2140 | ||
2141 | void vrrp_if_address_del(struct interface *ifp) | |
2142 | { | |
89f34204 QY |
2143 | /* |
2144 | * Zebra is stupid and sends us address deletion notifications | |
2145 | * when any of the following condition sets are met: | |
2146 | * | |
b0ec34c8 QY |
2147 | * - if_is_operative && address deleted |
2148 | * - if_is_operative -> !if_is_operative | |
89f34204 QY |
2149 | * |
2150 | * Note that the second one is nonsense, because Zebra behaves as | |
2151 | * though an interface going down means all the addresses on that | |
2152 | * interface got deleted. Which is a problem for autoconfig because all | |
2153 | * the addresses on an interface going away means the VRRP session goes | |
2154 | * to Initialize. However interfaces go down whenever we transition to | |
2155 | * Backup, so this effectively means that for autoconfigured instances | |
2156 | * we actually end up in Initialize whenever we try to go into Backup. | |
2157 | * | |
2158 | * Also, Zebra does NOT send us notifications when: | |
b0ec34c8 | 2159 | * - !if_is_operative && address deleted |
89f34204 QY |
2160 | * |
2161 | * Which means if we're in backup and an address is deleted out from | |
2162 | * under us, we won't even know. | |
2163 | * | |
2164 | * The only solution here is to only resynchronize our address list | |
2165 | * when: | |
2166 | * | |
2167 | * - An interfaces comes up | |
2168 | * - An interface address is added | |
2169 | * - An interface address is deleted AND the interface is up | |
2170 | * | |
2171 | * Even though this is only a problem with autoconfig at the moment I'm | |
2172 | * papering over Zebra's braindead semantics here. Every piece of code | |
2173 | * in this function should be protected by a check that the interface | |
2174 | * is up. | |
2175 | */ | |
b0ec34c8 | 2176 | if (if_is_operative(ifp)) { |
89f34204 QY |
2177 | vrrp_autoconfig_if_address_del(ifp); |
2178 | } | |
6e93585e QY |
2179 | } |
2180 | ||
27fd8827 QY |
2181 | /* Other ------------------------------------------------------------------- */ |
2182 | ||
f828842a QY |
2183 | int vrrp_config_write_interface(struct vty *vty) |
2184 | { | |
2185 | struct list *vrs = hash_to_list(vrrp_vrouters_hash); | |
3a9c6f93 | 2186 | struct listnode *ln, *ipln; |
f828842a QY |
2187 | struct vrrp_vrouter *vr; |
2188 | int writes = 0; | |
2189 | ||
2190 | for (ALL_LIST_ELEMENTS_RO(vrs, ln, vr)) { | |
2191 | vty_frame(vty, "interface %s\n", vr->ifp->name); | |
2192 | ++writes; | |
2193 | ||
2194 | vty_out(vty, " vrrp %" PRIu8 "%s\n", vr->vrid, | |
2195 | vr->version == 2 ? " version 2" : ""); | |
2196 | ++writes; | |
2197 | ||
8cd1d277 QY |
2198 | if (vr->shutdown != vd.shutdown && ++writes) |
2199 | vty_out(vty, " %svrrp %" PRIu8 " shutdown\n", | |
2200 | vr->shutdown ? "" : "no ", vr->vrid); | |
f96a183b | 2201 | |
8cd1d277 QY |
2202 | if (vr->preempt_mode != vd.preempt_mode && ++writes) |
2203 | vty_out(vty, " %svrrp %" PRIu8 " preempt\n", | |
2204 | vr->preempt_mode ? "" : "no ", vr->vrid); | |
f828842a | 2205 | |
8cd1d277 QY |
2206 | if (vr->accept_mode != vd.accept_mode && ++writes) |
2207 | vty_out(vty, " %svrrp %" PRIu8 " accept\n", | |
2208 | vr->accept_mode ? "" : "no ", vr->vrid); | |
f828842a | 2209 | |
8cd1d277 | 2210 | if (vr->advertisement_interval != vd.advertisement_interval |
f828842a QY |
2211 | && ++writes) |
2212 | vty_out(vty, | |
2213 | " vrrp %" PRIu8 | |
2214 | " advertisement-interval %" PRIu16 "\n", | |
2215 | vr->vrid, vr->advertisement_interval); | |
2216 | ||
8cd1d277 | 2217 | if (vr->priority != vd.priority && ++writes) |
f828842a QY |
2218 | vty_out(vty, " vrrp %" PRIu8 " priority %" PRIu8 "\n", |
2219 | vr->vrid, vr->priority); | |
2220 | ||
f828842a QY |
2221 | struct ipaddr *ip; |
2222 | ||
3a9c6f93 | 2223 | for (ALL_LIST_ELEMENTS_RO(vr->v4->addrs, ipln, ip)) { |
f828842a QY |
2224 | char ipbuf[INET6_ADDRSTRLEN]; |
2225 | ipaddr2str(ip, ipbuf, sizeof(ipbuf)); | |
2226 | vty_out(vty, " vrrp %" PRIu8 " ip %s\n", vr->vrid, | |
2227 | ipbuf); | |
2228 | ++writes; | |
2229 | } | |
3a9c6f93 QY |
2230 | |
2231 | for (ALL_LIST_ELEMENTS_RO(vr->v6->addrs, ipln, ip)) { | |
f828842a QY |
2232 | char ipbuf[INET6_ADDRSTRLEN]; |
2233 | ipaddr2str(ip, ipbuf, sizeof(ipbuf)); | |
2234 | vty_out(vty, " vrrp %" PRIu8 " ipv6 %s\n", vr->vrid, | |
2235 | ipbuf); | |
2236 | ++writes; | |
2237 | } | |
3a9c6f93 | 2238 | vty_endframe(vty, "!\n"); |
f828842a QY |
2239 | } |
2240 | ||
2241 | return writes; | |
2242 | } | |
2243 | ||
2244 | int vrrp_config_write_global(struct vty *vty) | |
2245 | { | |
8cd1d277 QY |
2246 | unsigned int writes = 0; |
2247 | ||
2248 | if (vrrp_autoconfig_is_on && ++writes) | |
f828842a QY |
2249 | vty_out(vty, "vrrp autoconfigure%s\n", |
2250 | vrrp_autoconfig_version == 2 ? " version 2" : ""); | |
2251 | ||
8cd1d277 QY |
2252 | if (vd.priority != VRRP_DEFAULT_PRIORITY && ++writes) |
2253 | vty_out(vty, "vrrp default priority %" PRIu8 "\n", vd.priority); | |
2254 | ||
2255 | if (vd.advertisement_interval != VRRP_DEFAULT_ADVINT && ++writes) | |
2256 | vty_out(vty, | |
2257 | "vrrp default advertisement-interval %" PRIu16 "\n", | |
2258 | vd.advertisement_interval); | |
2259 | ||
2260 | if (vd.preempt_mode != VRRP_DEFAULT_PREEMPT && ++writes) | |
2261 | vty_out(vty, "%svrrp default preempt\n", | |
2262 | !vd.preempt_mode ? "no " : ""); | |
2263 | ||
2264 | if (vd.accept_mode != VRRP_DEFAULT_ACCEPT && ++writes) | |
2265 | vty_out(vty, "%svrrp default accept\n", | |
2266 | !vd.accept_mode ? "no " : ""); | |
2267 | ||
2268 | if (vd.shutdown != VRRP_DEFAULT_SHUTDOWN && ++writes) | |
2269 | vty_out(vty, "%svrrp default shutdown\n", | |
2270 | !vd.shutdown ? "no " : ""); | |
2271 | ||
2272 | return writes; | |
f828842a QY |
2273 | } |
2274 | ||
5435a2bf QY |
2275 | static unsigned int vrrp_hash_key(void *arg) |
2276 | { | |
2277 | struct vrrp_vrouter *vr = arg; | |
2278 | ||
4f0b6b45 | 2279 | char key[IFNAMSIZ + 64]; |
fc278f75 | 2280 | snprintf(key, sizeof(key), "%s@%" PRIu8, vr->ifp->name, vr->vrid); |
4f0b6b45 QY |
2281 | |
2282 | return string_hash_make(key); | |
5435a2bf QY |
2283 | } |
2284 | ||
2285 | static bool vrrp_hash_cmp(const void *arg1, const void *arg2) | |
2286 | { | |
2287 | const struct vrrp_vrouter *vr1 = arg1; | |
2288 | const struct vrrp_vrouter *vr2 = arg2; | |
2289 | ||
4f0b6b45 QY |
2290 | if (vr1->ifp != vr2->ifp) |
2291 | return 0; | |
2292 | if (vr1->vrid != vr2->vrid) | |
2293 | return 0; | |
2294 | ||
2295 | return 1; | |
5435a2bf QY |
2296 | } |
2297 | ||
2298 | void vrrp_init(void) | |
2299 | { | |
8cd1d277 QY |
2300 | /* Set default defaults */ |
2301 | vd.priority = VRRP_DEFAULT_PRIORITY; | |
2302 | vd.advertisement_interval = VRRP_DEFAULT_ADVINT; | |
2303 | vd.preempt_mode = VRRP_DEFAULT_PREEMPT; | |
2304 | vd.accept_mode = VRRP_DEFAULT_ACCEPT; | |
2305 | vd.shutdown = VRRP_DEFAULT_SHUTDOWN; | |
2306 | ||
53e60e5c | 2307 | vrrp_autoconfig_version = 3; |
5435a2bf QY |
2308 | vrrp_vrouters_hash = hash_create(&vrrp_hash_key, vrrp_hash_cmp, |
2309 | "VRRP virtual router hash"); | |
2310 | vrf_init(NULL, NULL, NULL, NULL, NULL); | |
2311 | } |