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Commit | Line | Data |
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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" |
4f52e9a6 | 37 | #include "vrrp_ndisc.h" |
247aa469 | 38 | #include "vrrp_packet.h" |
f3fe0047 | 39 | #include "vrrp_zebra.h" |
5435a2bf | 40 | |
4ec94408 QY |
41 | #define VRRP_LOGPFX "[CORE] " |
42 | ||
bf8d3d6a DL |
43 | DEFINE_MTYPE_STATIC(VRRPD, VRRP_IP, "VRRP IP address"); |
44 | DEFINE_MTYPE_STATIC(VRRPD, VRRP_RTR, "VRRP Router"); | |
7c136b08 | 45 | |
27fd8827 QY |
46 | /* statics */ |
47 | struct hash *vrrp_vrouters_hash; | |
48 | bool vrrp_autoconfig_is_on; | |
49 | int vrrp_autoconfig_version; | |
50 | ||
8cd1d277 QY |
51 | struct vrrp_defaults vd; |
52 | ||
2b64873d | 53 | const char *const vrrp_state_names[3] = { |
4ec94408 QY |
54 | [VRRP_STATE_INITIALIZE] = "Initialize", |
55 | [VRRP_STATE_MASTER] = "Master", | |
56 | [VRRP_STATE_BACKUP] = "Backup", | |
57 | }; | |
58 | ||
2b64873d | 59 | static const char *const vrrp_event_names[2] = { |
4ec94408 QY |
60 | [VRRP_EVENT_STARTUP] = "Startup", |
61 | [VRRP_EVENT_SHUTDOWN] = "Shutdown", | |
62 | }; | |
63 | ||
64 | ||
5435a2bf QY |
65 | /* Utility functions ------------------------------------------------------- */ |
66 | ||
67 | /* | |
68 | * Sets an ethaddr to RFC-defined Virtual Router MAC address. | |
69 | * | |
70 | * mac | |
71 | * ethaddr to set | |
72 | * | |
73 | * v6 | |
74 | * Whether this is a V6 or V4 Virtual Router MAC | |
75 | * | |
76 | * vrid | |
77 | * Virtual Router Identifier | |
78 | */ | |
79 | static void vrrp_mac_set(struct ethaddr *mac, bool v6, uint8_t vrid) | |
80 | { | |
81 | /* | |
82 | * V4: 00-00-5E-00-01-{VRID} | |
83 | * V6: 00-00-5E-00-02-{VRID} | |
84 | */ | |
85 | mac->octet[0] = 0x00; | |
86 | mac->octet[1] = 0x00; | |
87 | mac->octet[2] = 0x5E; | |
88 | mac->octet[3] = 0x00; | |
89 | mac->octet[4] = v6 ? 0x02 : 0x01; | |
90 | mac->octet[5] = vrid; | |
91 | } | |
92 | ||
1d21789e | 93 | /* |
862f2f37 | 94 | * Recalculates and sets skew_time and master_down_interval based |
1d21789e QY |
95 | * values. |
96 | * | |
862f2f37 QY |
97 | * r |
98 | * VRRP Router to operate on | |
1d21789e | 99 | */ |
862f2f37 | 100 | static void vrrp_recalculate_timers(struct vrrp_router *r) |
1d21789e | 101 | { |
08671293 QY |
102 | uint16_t mdiadv = r->vr->version == 3 ? r->master_adver_interval |
103 | : r->vr->advertisement_interval; | |
8b28e459 | 104 | uint16_t skm = (r->vr->version == 3) ? r->master_adver_interval : 100; |
2fff50ec | 105 | |
2884f9bb | 106 | r->skew_time = ((256 - r->vr->priority) * skm) / 256; |
08671293 | 107 | r->master_down_interval = 3 * mdiadv; |
862f2f37 | 108 | r->master_down_interval += r->skew_time; |
1d21789e QY |
109 | } |
110 | ||
5d3730c5 QY |
111 | /* |
112 | * Determines if a VRRP router is the owner of the specified address. | |
113 | * | |
dad18a2f | 114 | * The determining factor for whether an interface is the address owner is |
2f1fc30f | 115 | * simply whether the address is assigned to the VRRP base interface by someone |
dad18a2f QY |
116 | * other than vrrpd. |
117 | * | |
118 | * This function should always return the correct answer regardless of | |
119 | * master/backup status. | |
120 | * | |
2f1fc30f QY |
121 | * ifp |
122 | * The interface to check owernship of. This should be the base interface of | |
123 | * a VRRP router. | |
124 | * | |
5d3730c5 | 125 | * vr |
862f2f37 | 126 | * Virtual Router |
5d3730c5 QY |
127 | * |
128 | * Returns: | |
129 | * whether or not vr owns the specified address | |
130 | */ | |
7e205b4a | 131 | static bool vrrp_is_owner(struct interface *ifp, struct ipaddr *addr) |
5d3730c5 | 132 | { |
2f1fc30f QY |
133 | /* |
134 | * This code sanity checks implicit ownership configuration. Ideally, | |
135 | * the way we determine address ownership status for this VRRP router | |
136 | * is by looking at whether our VIPs are also assigned to the base | |
137 | * interface, and therefore count as "real" addresses. This frees the | |
138 | * user from having to manually configure priority 255 to indicate | |
139 | * address ownership. However, this means one of the VIPs will be used | |
140 | * as the source address for VRRP advertisements, which in turn means | |
141 | * that other VRRP routers will be receiving packets with a source | |
142 | * address they themselves have. This causes lots of different issues | |
143 | * so for now we're disabling this and forcing the user to configure | |
144 | * priority 255 to indicate ownership. | |
145 | */ | |
146 | ||
147 | return false; | |
148 | ||
149 | #if 0 | |
7e205b4a | 150 | struct prefix p; |
5d3730c5 | 151 | |
7e205b4a QY |
152 | p.family = IS_IPADDR_V4(addr) ? AF_INET : AF_INET6; |
153 | p.prefixlen = IS_IPADDR_V4(addr) ? IPV4_MAX_BITLEN : IPV6_MAX_BITLEN; | |
154 | memcpy(&p.u, &addr->ip, sizeof(addr->ip)); | |
dad18a2f | 155 | |
7e205b4a | 156 | return !!connected_lookup_prefix_exact(ifp, &p); |
2f1fc30f | 157 | #endif |
5d3730c5 QY |
158 | } |
159 | ||
6e93585e QY |
160 | /* |
161 | * Whether an interface has a MAC address that matches the VRRP RFC. | |
162 | * | |
163 | * ifp | |
164 | * Interface to check | |
165 | * | |
166 | * Returns: | |
167 | * Whether the interface has a VRRP mac or not | |
168 | */ | |
169 | static bool vrrp_ifp_has_vrrp_mac(struct interface *ifp) | |
170 | { | |
171 | struct ethaddr vmac4; | |
172 | struct ethaddr vmac6; | |
2fff50ec | 173 | |
6e93585e QY |
174 | vrrp_mac_set(&vmac4, 0, 0x00); |
175 | vrrp_mac_set(&vmac6, 1, 0x00); | |
176 | ||
177 | return !memcmp(ifp->hw_addr, vmac4.octet, sizeof(vmac4.octet) - 1) | |
178 | || !memcmp(ifp->hw_addr, vmac6.octet, sizeof(vmac6.octet) - 1); | |
179 | } | |
180 | ||
181 | /* | |
182 | * Lookup a Virtual Router instance given a macvlan subinterface. | |
183 | * | |
184 | * The VRID is extracted from the interface MAC and the 2-tuple (iface, vrid) | |
185 | * is used to look up any existing instances that match the interface. It does | |
186 | * not matter whether the instance is already bound to the interface or not. | |
187 | * | |
2681134b QY |
188 | * Note that the interface linkages must be correct for this to work. In other |
189 | * words, the macvlan must have a valid VRRP MAC, and its link_ifindex must be | |
190 | * be equal to the ifindex of another interface in the interface RB trees (its | |
191 | * parent). If these conditions aren't satisfied we won't find the VR. | |
192 | * | |
6e93585e QY |
193 | * mvl_ifp |
194 | * Interface pointer to use to lookup. Should be a macvlan device. | |
195 | * | |
196 | * Returns: | |
197 | * Virtual Router, if found | |
198 | * NULL otherwise | |
199 | */ | |
200 | static struct vrrp_vrouter *vrrp_lookup_by_if_mvl(struct interface *mvl_ifp) | |
201 | { | |
202 | struct interface *p; | |
203 | ||
c257cce4 | 204 | if (!mvl_ifp || mvl_ifp->link_ifindex == 0 |
76bcde9e | 205 | || !vrrp_ifp_has_vrrp_mac(mvl_ifp)) { |
c257cce4 | 206 | if (mvl_ifp && mvl_ifp->link_ifindex == 0) |
76bcde9e QY |
207 | DEBUGD(&vrrp_dbg_zebra, |
208 | VRRP_LOGPFX | |
209 | "Interface %s has no parent ifindex; disregarding", | |
210 | mvl_ifp->name); | |
c257cce4 | 211 | if (mvl_ifp && !vrrp_ifp_has_vrrp_mac(mvl_ifp)) |
76bcde9e QY |
212 | DEBUGD(&vrrp_dbg_zebra, |
213 | VRRP_LOGPFX | |
214 | "Interface %s has a non-VRRP MAC; disregarding", | |
215 | mvl_ifp->name); | |
6e93585e | 216 | return NULL; |
76bcde9e | 217 | } |
6e93585e | 218 | |
490810d5 | 219 | p = if_lookup_by_index(mvl_ifp->link_ifindex, mvl_ifp->vrf_id); |
3cb543cf QY |
220 | |
221 | if (!p) { | |
222 | DEBUGD(&vrrp_dbg_zebra, | |
223 | VRRP_LOGPFX | |
224 | "Tried to lookup interface %d, parent of %s, but it doesn't exist", | |
225 | mvl_ifp->link_ifindex, mvl_ifp->name); | |
226 | return NULL; | |
227 | } | |
228 | ||
6e93585e QY |
229 | uint8_t vrid = mvl_ifp->hw_addr[5]; |
230 | ||
231 | return vrrp_lookup(p, vrid); | |
232 | } | |
233 | ||
234 | /* | |
235 | * Lookup the Virtual Router instances configured on a particular interface. | |
236 | * | |
237 | * ifp | |
238 | * Interface pointer to use to lookup. Should not be a macvlan device. | |
239 | * | |
240 | * Returns: | |
241 | * List of virtual routers found | |
242 | */ | |
243 | static struct list *vrrp_lookup_by_if(struct interface *ifp) | |
244 | { | |
245 | struct list *l = hash_to_list(vrrp_vrouters_hash); | |
246 | struct listnode *ln, *nn; | |
247 | struct vrrp_vrouter *vr; | |
248 | ||
249 | for (ALL_LIST_ELEMENTS(l, ln, nn, vr)) | |
250 | if (vr->ifp != ifp) | |
251 | list_delete_node(l, ln); | |
252 | ||
253 | return l; | |
254 | } | |
255 | ||
256 | /* | |
257 | * Lookup any Virtual Router instances associated with a particular interface. | |
258 | * This is a combination of the results from vrrp_lookup_by_if_mvl and | |
259 | * vrrp_lookup_by_if. | |
260 | * | |
261 | * Suppose the system interface list looks like the following: | |
262 | * | |
263 | * eth0 | |
264 | * \- eth0-v0 00:00:5e:00:01:01 | |
265 | * \- eth0-v1 00:00:5e:00:02:01 | |
266 | * \- eth0-v2 00:00:5e:00:01:0a | |
267 | * | |
268 | * Passing eth0-v2 to this function will give you the VRRP instance configured | |
269 | * on eth0 with VRID 10. Passing eth0-v0 or eth0-v1 will give you the VRRP | |
270 | * instance configured on eth0 with VRID 1. Passing eth0 will give you both. | |
271 | * | |
272 | * ifp | |
273 | * Interface pointer to use to lookup. Can be any interface. | |
274 | * | |
275 | * Returns: | |
276 | * List of virtual routers found | |
277 | */ | |
278 | static struct list *vrrp_lookup_by_if_any(struct interface *ifp) | |
279 | { | |
280 | struct vrrp_vrouter *vr; | |
281 | struct list *vrs; | |
282 | ||
283 | vr = vrrp_lookup_by_if_mvl(ifp); | |
284 | vrs = vr ? list_new() : vrrp_lookup_by_if(ifp); | |
285 | ||
286 | if (vr) | |
287 | listnode_add(vrs, vr); | |
288 | ||
289 | return vrs; | |
290 | } | |
291 | ||
1d21789e QY |
292 | /* Configuration controllers ----------------------------------------------- */ |
293 | ||
6e93585e QY |
294 | void vrrp_check_start(struct vrrp_vrouter *vr) |
295 | { | |
296 | struct vrrp_router *r; | |
297 | bool start; | |
d8b92c67 | 298 | const char *whynot = NULL; |
6e93585e QY |
299 | |
300 | if (vr->shutdown || vr->ifp == NULL) | |
301 | return; | |
302 | ||
303 | r = vr->v4; | |
114a413e | 304 | /* Must not already be started */ |
6e93585e | 305 | start = r->fsm.state == VRRP_STATE_INITIALIZE; |
d8b92c67 | 306 | whynot = (!start && !whynot) ? "Already running" : whynot; |
114a413e | 307 | /* Must have a parent interface */ |
6e93585e | 308 | start = start && (vr->ifp != NULL); |
00c3cf9c | 309 | whynot = (!start && !whynot) ? "No base interface" : whynot; |
c16fb340 | 310 | #if 0 |
114a413e | 311 | /* Parent interface must be up */ |
b0ec34c8 | 312 | start = start && if_is_operative(vr->ifp); |
d8b92c67 | 313 | start = (!start && !whynot) ? "Base interface inoperative" : whynot; |
c16fb340 | 314 | #endif |
114a413e | 315 | /* Parent interface must have at least one v4 */ |
457ea8d4 | 316 | start = start && connected_count_by_family(vr->ifp, AF_INET) > 0; |
00c3cf9c | 317 | whynot = (!start && !whynot) ? "No primary IPv4 address" : whynot; |
114a413e | 318 | /* Must have a macvlan interface */ |
6e93585e | 319 | start = start && (r->mvl_ifp != NULL); |
00c3cf9c | 320 | whynot = (!start && !whynot) ? "No VRRP interface" : whynot; |
c16fb340 | 321 | #if 0 |
b0ec34c8 QY |
322 | /* Macvlan interface must be admin up */ |
323 | start = start && CHECK_FLAG(r->mvl_ifp->flags, IFF_UP); | |
d8b92c67 | 324 | start = (!start && !whynot) ? "Macvlan device admin down" : whynot; |
c16fb340 | 325 | #endif |
114a413e | 326 | /* Must have at least one VIP configured */ |
6e93585e | 327 | start = start && r->addrs->count > 0; |
00c3cf9c QY |
328 | whynot = (!start && !whynot) ? "No Virtual IP address configured" |
329 | : whynot; | |
6e93585e QY |
330 | if (start) |
331 | vrrp_event(r, VRRP_EVENT_STARTUP); | |
6309f71c | 332 | else if (whynot) |
613b45b0 QY |
333 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
334 | "Refusing to start Virtual Router: %s", | |
335 | vr->vrid, family2str(r->family), whynot); | |
6e93585e | 336 | |
d8b92c67 QY |
337 | whynot = NULL; |
338 | ||
6e93585e | 339 | r = vr->v6; |
114a413e | 340 | /* Must not already be started */ |
6e93585e | 341 | start = r->fsm.state == VRRP_STATE_INITIALIZE; |
d8b92c67 | 342 | whynot = (!start && !whynot) ? "Already running" : whynot; |
26c7454b | 343 | /* Must not be v2 */ |
bdf16661 | 344 | start = start && vr->version != 2; |
00c3cf9c | 345 | whynot = (!start && !whynot) ? "VRRPv2 does not support v6" : whynot; |
114a413e | 346 | /* Must have a parent interface */ |
6e93585e | 347 | start = start && (vr->ifp != NULL); |
00c3cf9c | 348 | whynot = (!start && !whynot) ? "No base interface" : whynot; |
c16fb340 | 349 | #if 0 |
114a413e | 350 | /* Parent interface must be up */ |
b0ec34c8 | 351 | start = start && if_is_operative(vr->ifp); |
d8b92c67 | 352 | start = (!start && !whynot) ? "Base interface inoperative" : whynot; |
c16fb340 | 353 | #endif |
114a413e | 354 | /* Must have a macvlan interface */ |
6e93585e | 355 | start = start && (r->mvl_ifp != NULL); |
00c3cf9c | 356 | whynot = (!start && !whynot) ? "No VRRP interface" : whynot; |
c16fb340 | 357 | #if 0 |
b0ec34c8 QY |
358 | /* Macvlan interface must be admin up */ |
359 | start = start && CHECK_FLAG(r->mvl_ifp->flags, IFF_UP); | |
d8b92c67 | 360 | start = (!start && !whynot) ? "Macvlan device admin down" : whynot; |
114a413e QY |
361 | /* Macvlan interface must have a link local */ |
362 | start = start && connected_get_linklocal(r->mvl_ifp); | |
2fff50ec | 363 | whynot = |
457ea8d4 | 364 | (!start && !whynot) ? "No link local address configured" : whynot; |
6309f71c | 365 | /* Macvlan interface must have a v6 IP besides the link local */ |
457ea8d4 | 366 | start = start && (connected_count_by_family(r->mvl_ifp, AF_INET6) > 1); |
2fff50ec | 367 | whynot = (!start && !whynot) |
457ea8d4 GN |
368 | ? "No Virtual IPv6 address configured on macvlan device" |
369 | : whynot; | |
d5dc62c4 | 370 | #endif |
114a413e | 371 | /* Must have at least one VIP configured */ |
6e93585e | 372 | start = start && r->addrs->count > 0; |
2fff50ec | 373 | whynot = |
457ea8d4 | 374 | (!start && !whynot) ? "No Virtual IP address configured" : whynot; |
6e93585e QY |
375 | if (start) |
376 | vrrp_event(r, VRRP_EVENT_STARTUP); | |
6309f71c | 377 | else if (whynot) |
613b45b0 QY |
378 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
379 | "Refusing to start Virtual Router: %s", | |
380 | vr->vrid, family2str(r->family), whynot); | |
6e93585e QY |
381 | } |
382 | ||
1d21789e | 383 | void vrrp_set_priority(struct vrrp_vrouter *vr, uint8_t priority) |
c23edd74 | 384 | { |
862f2f37 | 385 | vr->priority = priority; |
bac08ded QY |
386 | vr->v4->priority = priority; |
387 | vr->v6->priority = priority; | |
c23edd74 QY |
388 | } |
389 | ||
1d21789e QY |
390 | void vrrp_set_advertisement_interval(struct vrrp_vrouter *vr, |
391 | uint16_t advertisement_interval) | |
392 | { | |
393 | if (vr->advertisement_interval == advertisement_interval) | |
394 | return; | |
395 | ||
862f2f37 QY |
396 | vr->advertisement_interval = advertisement_interval; |
397 | vrrp_recalculate_timers(vr->v4); | |
398 | vrrp_recalculate_timers(vr->v6); | |
399 | } | |
400 | ||
2cd90902 | 401 | static bool vrrp_has_ip(struct vrrp_vrouter *vr, struct ipaddr *ip) |
862f2f37 | 402 | { |
2cd90902 QY |
403 | struct vrrp_router *r = ip->ipa_type == IPADDR_V4 ? vr->v4 : vr->v6; |
404 | struct listnode *ln; | |
405 | struct ipaddr *iter; | |
862f2f37 | 406 | |
2cd90902 | 407 | for (ALL_LIST_ELEMENTS_RO(r->addrs, ln, iter)) |
e920b0b2 | 408 | if (!memcmp(&iter->ip, &ip->ip, IPADDRSZ(ip))) |
2cd90902 | 409 | return true; |
10133a59 | 410 | |
2cd90902 QY |
411 | return false; |
412 | } | |
413 | ||
671fd2a3 | 414 | int vrrp_add_ip(struct vrrp_vrouter *vr, struct ipaddr *ip) |
2cd90902 | 415 | { |
671fd2a3 QY |
416 | struct vrrp_router *r = IS_IPADDR_V4(ip) ? vr->v4 : vr->v6; |
417 | int af = r->family; | |
27fd8827 QY |
418 | |
419 | assert(r->family == af); | |
359c72ba | 420 | assert(!(r->vr->version == 2 && ip->ipa_type == IPADDR_V6)); |
27fd8827 | 421 | |
2cd90902 QY |
422 | if (vrrp_has_ip(r->vr, ip)) |
423 | return 0; | |
424 | ||
425 | if (!vrrp_is_owner(r->vr->ifp, ip) && r->is_owner) { | |
10133a59 | 426 | char ipbuf[INET6_ADDRSTRLEN]; |
2fff50ec | 427 | |
2cd90902 | 428 | inet_ntop(r->family, &ip->ip, ipbuf, sizeof(ipbuf)); |
10133a59 | 429 | zlog_err( |
613b45b0 | 430 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
10133a59 | 431 | "This VRRP router is not the address owner of %s, but is the address owner of other addresses; this config is unsupported.", |
613b45b0 | 432 | r->vr->vrid, family2str(r->family), ipbuf); |
2cd90902 | 433 | return -1; |
10133a59 QY |
434 | } |
435 | ||
72df9d93 | 436 | struct ipaddr *new = XCALLOC(MTYPE_VRRP_IP, sizeof(struct ipaddr)); |
2cd90902 QY |
437 | |
438 | *new = *ip; | |
439 | listnode_add(r->addrs, new); | |
440 | ||
6e93585e | 441 | if (r->fsm.state == VRRP_STATE_MASTER) { |
2cd90902 QY |
442 | switch (r->family) { |
443 | case AF_INET: | |
444 | vrrp_garp_send(r, &new->ipaddr_v4); | |
445 | break; | |
446 | case AF_INET6: | |
447 | vrrp_ndisc_una_send(r, new); | |
448 | break; | |
449 | } | |
450 | } | |
451 | ||
6e93585e | 452 | return 0; |
2cd90902 QY |
453 | } |
454 | ||
6e93585e | 455 | int vrrp_add_ipv4(struct vrrp_vrouter *vr, struct in_addr v4) |
2cd90902 QY |
456 | { |
457 | struct ipaddr ip; | |
2fff50ec | 458 | |
2cd90902 QY |
459 | ip.ipa_type = IPADDR_V4; |
460 | ip.ipaddr_v4 = v4; | |
671fd2a3 | 461 | return vrrp_add_ip(vr, &ip); |
2cd90902 QY |
462 | } |
463 | ||
6e93585e | 464 | int vrrp_add_ipv6(struct vrrp_vrouter *vr, struct in6_addr v6) |
2cd90902 | 465 | { |
359c72ba QY |
466 | assert(vr->version != 2); |
467 | ||
2cd90902 | 468 | struct ipaddr ip; |
2fff50ec | 469 | |
2cd90902 QY |
470 | ip.ipa_type = IPADDR_V6; |
471 | ip.ipaddr_v6 = v6; | |
671fd2a3 | 472 | return vrrp_add_ip(vr, &ip); |
1d21789e QY |
473 | } |
474 | ||
671fd2a3 | 475 | int vrrp_del_ip(struct vrrp_vrouter *vr, struct ipaddr *ip) |
c23edd74 | 476 | { |
2cd90902 QY |
477 | struct listnode *ln, *nn; |
478 | struct ipaddr *iter; | |
479 | int ret = 0; | |
c23edd74 | 480 | |
671fd2a3 QY |
481 | struct vrrp_router *r = IS_IPADDR_V4(ip) ? vr->v4 : vr->v6; |
482 | ||
2cd90902 QY |
483 | if (!vrrp_has_ip(r->vr, ip)) |
484 | return 0; | |
10133a59 | 485 | |
6e93585e QY |
486 | for (ALL_LIST_ELEMENTS(r->addrs, ln, nn, iter)) |
487 | if (!memcmp(&iter->ip, &ip->ip, IPADDRSZ(ip))) | |
488 | list_delete_node(r->addrs, ln); | |
2cd90902 QY |
489 | |
490 | /* | |
6e93585e QY |
491 | * NB: Deleting the last address and then issuing a shutdown will cause |
492 | * transmission of a priority 0 VRRP Advertisement - as per the RFC - | |
493 | * but it will have no addresses. This is not forbidden in the RFC but | |
494 | * might confuse other implementations. | |
2cd90902 | 495 | */ |
6e93585e QY |
496 | if (r->addrs->count == 0 && r->fsm.state != VRRP_STATE_INITIALIZE) |
497 | ret = vrrp_event(r, VRRP_EVENT_SHUTDOWN); | |
10133a59 | 498 | |
2cd90902 QY |
499 | return ret; |
500 | } | |
4f52e9a6 | 501 | |
6e93585e | 502 | int vrrp_del_ipv6(struct vrrp_vrouter *vr, struct in6_addr v6) |
2cd90902 QY |
503 | { |
504 | struct ipaddr ip; | |
2fff50ec | 505 | |
2cd90902 QY |
506 | ip.ipa_type = IPADDR_V6; |
507 | ip.ipaddr_v6 = v6; | |
671fd2a3 | 508 | return vrrp_del_ip(vr, &ip); |
862f2f37 QY |
509 | } |
510 | ||
6e93585e | 511 | int vrrp_del_ipv4(struct vrrp_vrouter *vr, struct in_addr v4) |
862f2f37 | 512 | { |
2cd90902 | 513 | struct ipaddr ip; |
2fff50ec | 514 | |
2cd90902 QY |
515 | ip.ipa_type = IPADDR_V4; |
516 | ip.ipaddr_v4 = v4; | |
671fd2a3 | 517 | return vrrp_del_ip(vr, &ip); |
c23edd74 QY |
518 | } |
519 | ||
1d21789e QY |
520 | |
521 | /* Creation and destruction ------------------------------------------------ */ | |
522 | ||
6287cefe QY |
523 | static void vrrp_router_addr_list_del_cb(void *val) |
524 | { | |
525 | struct ipaddr *ip = val; | |
2fff50ec | 526 | |
72df9d93 | 527 | XFREE(MTYPE_VRRP_IP, ip); |
6287cefe QY |
528 | } |
529 | ||
85467974 QY |
530 | /* |
531 | * Search for a suitable macvlan subinterface we can attach to, and if found, | |
532 | * attach to it. | |
533 | * | |
534 | * r | |
535 | * Router to attach to interface | |
536 | * | |
537 | * Returns: | |
538 | * Whether an interface was successfully attached | |
539 | */ | |
540 | static bool vrrp_attach_interface(struct vrrp_router *r) | |
862f2f37 | 541 | { |
dad18a2f QY |
542 | /* Search for existing interface with computed MAC address */ |
543 | struct interface **ifps; | |
2fff50ec | 544 | |
490810d5 QY |
545 | size_t ifps_cnt = |
546 | if_lookup_by_hwaddr(r->vmac.octet, sizeof(r->vmac.octet), &ifps, | |
547 | r->vr->ifp->vrf_id); | |
dad18a2f QY |
548 | |
549 | /* | |
1b1f3c43 QY |
550 | * Filter to only those macvlan interfaces whose parent is the base |
551 | * interface this VRRP router is configured on. | |
dad18a2f QY |
552 | * |
553 | * If there are still multiple interfaces we just select the first one, | |
554 | * as it should be functionally identical to the others. | |
555 | */ | |
556 | unsigned int candidates = 0; | |
557 | struct interface *selection = NULL; | |
2fff50ec | 558 | |
dad18a2f | 559 | for (unsigned int i = 0; i < ifps_cnt; i++) { |
b0ec34c8 | 560 | if (ifps[i]->link_ifindex != r->vr->ifp->ifindex) |
dad18a2f QY |
561 | ifps[i] = NULL; |
562 | else { | |
563 | selection = selection ? selection : ifps[i]; | |
564 | candidates++; | |
565 | } | |
566 | } | |
567 | ||
b79640e4 QY |
568 | if (ifps_cnt) |
569 | XFREE(MTYPE_TMP, ifps); | |
dad18a2f QY |
570 | |
571 | char ethstr[ETHER_ADDR_STRLEN]; | |
2fff50ec | 572 | |
dad18a2f QY |
573 | prefix_mac2str(&r->vmac, ethstr, sizeof(ethstr)); |
574 | ||
575 | assert(!!selection == !!candidates); | |
576 | ||
577 | if (candidates == 0) | |
613b45b0 QY |
578 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
579 | "Interface: None (no interface found w/ MAC %s)", | |
e6341d21 | 580 | r->vr->vrid, family2str(r->family), ethstr); |
dad18a2f | 581 | else if (candidates > 1) |
613b45b0 QY |
582 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
583 | "Interface: Multiple interfaces found; using %s", | |
e6341d21 | 584 | r->vr->vrid, family2str(r->family), selection->name); |
dad18a2f | 585 | else |
613b45b0 QY |
586 | zlog_info(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
587 | "Interface: %s", | |
e6341d21 | 588 | r->vr->vrid, family2str(r->family), selection->name); |
dad18a2f | 589 | |
7e205b4a | 590 | r->mvl_ifp = selection; |
dad18a2f | 591 | |
85467974 | 592 | return !!r->mvl_ifp; |
85467974 QY |
593 | } |
594 | ||
595 | static struct vrrp_router *vrrp_router_create(struct vrrp_vrouter *vr, | |
596 | int family) | |
597 | { | |
72df9d93 QY |
598 | struct vrrp_router *r = |
599 | XCALLOC(MTYPE_VRRP_RTR, sizeof(struct vrrp_router)); | |
85467974 QY |
600 | |
601 | r->family = family; | |
602 | r->sock_rx = -1; | |
603 | r->sock_tx = -1; | |
604 | r->vr = vr; | |
605 | r->addrs = list_new(); | |
606 | r->addrs->del = vrrp_router_addr_list_del_cb; | |
607 | r->priority = vr->priority; | |
608 | r->fsm.state = VRRP_STATE_INITIALIZE; | |
609 | vrrp_mac_set(&r->vmac, family == AF_INET6, vr->vrid); | |
610 | ||
611 | vrrp_attach_interface(r); | |
612 | ||
862f2f37 QY |
613 | return r; |
614 | } | |
615 | ||
616 | static void vrrp_router_destroy(struct vrrp_router *r) | |
617 | { | |
6287cefe QY |
618 | if (r->is_active) |
619 | vrrp_event(r, VRRP_EVENT_SHUTDOWN); | |
620 | ||
2fff50ec | 621 | if (r->sock_rx >= 0) |
dad18a2f | 622 | close(r->sock_rx); |
2fff50ec | 623 | if (r->sock_tx >= 0) |
dad18a2f | 624 | close(r->sock_tx); |
6287cefe | 625 | |
862f2f37 QY |
626 | /* FIXME: also delete list elements */ |
627 | list_delete(&r->addrs); | |
72df9d93 | 628 | XFREE(MTYPE_VRRP_RTR, r); |
862f2f37 QY |
629 | } |
630 | ||
99966840 QY |
631 | struct vrrp_vrouter *vrrp_vrouter_create(struct interface *ifp, uint8_t vrid, |
632 | uint8_t version) | |
5435a2bf | 633 | { |
4f0b6b45 | 634 | struct vrrp_vrouter *vr = vrrp_lookup(ifp, vrid); |
6287cefe QY |
635 | |
636 | if (vr) | |
637 | return vr; | |
638 | ||
99966840 QY |
639 | if (version != 2 && version != 3) |
640 | return NULL; | |
641 | ||
72df9d93 | 642 | vr = XCALLOC(MTYPE_VRRP_RTR, sizeof(struct vrrp_vrouter)); |
5435a2bf | 643 | |
5435a2bf | 644 | vr->ifp = ifp; |
99966840 | 645 | vr->version = version; |
5435a2bf | 646 | vr->vrid = vrid; |
8cd1d277 QY |
647 | vr->priority = vd.priority; |
648 | vr->preempt_mode = vd.preempt_mode; | |
649 | vr->accept_mode = vd.accept_mode; | |
650 | vr->shutdown = vd.shutdown; | |
862f2f37 QY |
651 | |
652 | vr->v4 = vrrp_router_create(vr, AF_INET); | |
653 | vr->v6 = vrrp_router_create(vr, AF_INET6); | |
654 | ||
8cd1d277 | 655 | vrrp_set_advertisement_interval(vr, vd.advertisement_interval); |
5435a2bf QY |
656 | |
657 | hash_get(vrrp_vrouters_hash, vr, hash_alloc_intern); | |
658 | ||
659 | return vr; | |
660 | } | |
661 | ||
c23edd74 QY |
662 | void vrrp_vrouter_destroy(struct vrrp_vrouter *vr) |
663 | { | |
862f2f37 QY |
664 | vrrp_router_destroy(vr->v4); |
665 | vrrp_router_destroy(vr->v6); | |
c23edd74 | 666 | hash_release(vrrp_vrouters_hash, vr); |
72df9d93 | 667 | XFREE(MTYPE_VRRP_RTR, vr); |
c23edd74 QY |
668 | } |
669 | ||
fb8b348c | 670 | struct vrrp_vrouter *vrrp_lookup(const struct interface *ifp, uint8_t vrid) |
5435a2bf QY |
671 | { |
672 | struct vrrp_vrouter vr; | |
2fff50ec | 673 | |
5435a2bf | 674 | vr.vrid = vrid; |
fb8b348c | 675 | vr.ifp = (struct interface *)ifp; |
5435a2bf QY |
676 | |
677 | return hash_lookup(vrrp_vrouters_hash, &vr); | |
678 | } | |
679 | ||
680 | /* Network ----------------------------------------------------------------- */ | |
681 | ||
10133a59 QY |
682 | /* Forward decls */ |
683 | static void vrrp_change_state(struct vrrp_router *r, int to); | |
684 | static int vrrp_adver_timer_expire(struct thread *thread); | |
685 | static int vrrp_master_down_timer_expire(struct thread *thread); | |
686 | ||
958b1487 QY |
687 | /* |
688 | * Finds the first connected address of the appropriate family on a VRRP | |
689 | * router's interface and binds the Tx socket of the VRRP router to that | |
690 | * address. | |
691 | * | |
692 | * Also sets src field of vrrp_router. | |
693 | * | |
694 | * r | |
695 | * VRRP router to operate on | |
696 | * | |
697 | * Returns: | |
698 | * 0 on success | |
699 | * -1 on failure | |
700 | */ | |
701 | static int vrrp_bind_to_primary_connected(struct vrrp_router *r) | |
702 | { | |
958b1487 QY |
703 | struct interface *ifp; |
704 | ||
705 | /* | |
706 | * A slight quirk: the RFC specifies that advertisements under IPv6 must | |
707 | * be transmitted using the link local address of the source interface | |
708 | */ | |
709 | ifp = r->family == AF_INET ? r->vr->ifp : r->mvl_ifp; | |
710 | ||
711 | struct listnode *ln; | |
712 | struct connected *c = NULL; | |
2fff50ec | 713 | |
958b1487 QY |
714 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, ln, c)) |
715 | if (c->address->family == r->family) { | |
716 | if (r->family == AF_INET6 | |
717 | && IN6_IS_ADDR_LINKLOCAL(&c->address->u.prefix6)) | |
718 | break; | |
719 | else if (r->family == AF_INET) | |
720 | break; | |
721 | } | |
722 | ||
723 | if (c == NULL) { | |
724 | zlog_err(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM | |
725 | "Failed to find address to bind on %s", | |
726 | r->vr->vrid, family2str(r->family), ifp->name); | |
727 | return -1; | |
728 | } | |
729 | ||
730 | union sockunion su; | |
2fff50ec | 731 | |
958b1487 QY |
732 | memset(&su, 0x00, sizeof(su)); |
733 | ||
734 | switch (r->family) { | |
735 | case AF_INET: | |
736 | r->src.ipa_type = IPADDR_V4; | |
737 | r->src.ipaddr_v4 = c->address->u.prefix4; | |
738 | su.sin.sin_family = AF_INET; | |
739 | su.sin.sin_addr = c->address->u.prefix4; | |
740 | break; | |
741 | case AF_INET6: | |
742 | r->src.ipa_type = IPADDR_V6; | |
743 | r->src.ipaddr_v6 = c->address->u.prefix6; | |
744 | su.sin6.sin6_family = AF_INET6; | |
745 | su.sin6.sin6_scope_id = ifp->ifindex; | |
746 | su.sin6.sin6_addr = c->address->u.prefix6; | |
747 | break; | |
748 | } | |
749 | ||
19c38250 QY |
750 | int ret = 0; |
751 | ||
958b1487 QY |
752 | sockopt_reuseaddr(r->sock_tx); |
753 | if (bind(r->sock_tx, (const struct sockaddr *)&su, sizeof(su)) < 0) { | |
754 | zlog_err( | |
755 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM | |
26b6d034 PR |
756 | "Failed to bind Tx socket to primary IP address %pFX: %s", |
757 | r->vr->vrid, family2str(r->family), c->address, | |
958b1487 | 758 | safe_strerror(errno)); |
19c38250 | 759 | ret = -1; |
958b1487 QY |
760 | } else { |
761 | DEBUGD(&vrrp_dbg_sock, | |
762 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM | |
26b6d034 PR |
763 | "Bound Tx socket to primary IP address %pFX", |
764 | r->vr->vrid, family2str(r->family), c->address); | |
958b1487 QY |
765 | } |
766 | ||
19c38250 | 767 | return ret; |
958b1487 QY |
768 | } |
769 | ||
770 | ||
5435a2bf | 771 | /* |
91188ca6 | 772 | * Create and multicast a VRRP ADVERTISEMENT message. |
5435a2bf | 773 | * |
862f2f37 QY |
774 | * r |
775 | * VRRP Router for which to send ADVERTISEMENT | |
5435a2bf | 776 | */ |
862f2f37 | 777 | static void vrrp_send_advertisement(struct vrrp_router *r) |
5435a2bf | 778 | { |
247aa469 | 779 | struct vrrp_pkt *pkt; |
d9e01e1c | 780 | ssize_t pktsz; |
862f2f37 QY |
781 | struct ipaddr *addrs[r->addrs->count]; |
782 | union sockunion dest; | |
247aa469 | 783 | |
958b1487 QY |
784 | if (r->src.ipa_type == IPADDR_NONE |
785 | && vrrp_bind_to_primary_connected(r) < 0) | |
786 | return; | |
787 | ||
862f2f37 | 788 | list_to_array(r->addrs, (void **)addrs, r->addrs->count); |
247aa469 | 789 | |
99966840 QY |
790 | pktsz = vrrp_pkt_adver_build(&pkt, &r->src, r->vr->version, r->vr->vrid, |
791 | r->priority, r->vr->advertisement_interval, | |
d9e01e1c | 792 | r->addrs->count, (struct ipaddr **)&addrs); |
247aa469 | 793 | |
b637bcd4 QY |
794 | if (DEBUG_MODE_CHECK(&vrrp_dbg_pkt, DEBUG_MODE_ALL)) |
795 | zlog_hexdump(pkt, (size_t)pktsz); | |
247aa469 | 796 | |
354b49d6 QY |
797 | const char *group = r->family == AF_INET ? VRRP_MCASTV4_GROUP_STR |
798 | : VRRP_MCASTV6_GROUP_STR; | |
ab059def | 799 | (void)str2sockunion(group, &dest); |
247aa469 | 800 | |
d9e01e1c | 801 | ssize_t sent = sendto(r->sock_tx, pkt, (size_t)pktsz, 0, &dest.sa, |
862f2f37 | 802 | sockunion_sizeof(&dest)); |
4ec94408 | 803 | |
7c136b08 | 804 | vrrp_pkt_free(pkt); |
bb54fa3a | 805 | |
4ec94408 | 806 | if (sent < 0) { |
613b45b0 | 807 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
8071d5c3 | 808 | "Failed to send VRRP Advertisement: %s", |
613b45b0 QY |
809 | r->vr->vrid, family2str(r->family), |
810 | safe_strerror(errno)); | |
6332c77f QY |
811 | } else { |
812 | ++r->stats.adver_tx_cnt; | |
4ec94408 | 813 | } |
5435a2bf QY |
814 | } |
815 | ||
10133a59 QY |
816 | /* |
817 | * Receive and parse VRRP advertisement. | |
818 | * | |
819 | * By the time we get here all fields have been validated for basic correctness | |
820 | * and the packet is a valid VRRP packet. | |
821 | * | |
822 | * However, we have not validated whether the VRID is correct for this virtual | |
823 | * router, nor whether the priority is correct (i.e. is not 255 when we are the | |
99966840 QY |
824 | * address owner), nor whether the advertisement interval equals our own |
825 | * configured value (this check is only performed in VRRPv2). | |
0f1f98e8 QY |
826 | * |
827 | * r | |
828 | * VRRP Router associated with the socket this advertisement was received on | |
829 | * | |
830 | * src | |
831 | * Source address of sender | |
832 | * | |
833 | * pkt | |
834 | * The advertisement they sent | |
835 | * | |
836 | * pktsize | |
837 | * Size of advertisement | |
838 | * | |
839 | * Returns: | |
840 | * -1 if advertisement is invalid | |
841 | * 0 otherwise | |
10133a59 | 842 | */ |
0f1f98e8 QY |
843 | static int vrrp_recv_advertisement(struct vrrp_router *r, struct ipaddr *src, |
844 | struct vrrp_pkt *pkt, size_t pktsize) | |
5435a2bf | 845 | { |
3708883c | 846 | char sipstr[INET6_ADDRSTRLEN]; |
c7e65c4f | 847 | char dipstr[INET6_ADDRSTRLEN]; |
2fff50ec QY |
848 | |
849 | ipaddr2str(src, sipstr, sizeof(sipstr)); | |
c7e65c4f | 850 | ipaddr2str(&r->src, dipstr, sizeof(dipstr)); |
3708883c | 851 | |
91188ca6 | 852 | char dumpbuf[BUFSIZ]; |
2fff50ec | 853 | |
d9e01e1c | 854 | vrrp_pkt_adver_dump(dumpbuf, sizeof(dumpbuf), pkt); |
b637bcd4 | 855 | DEBUGD(&vrrp_dbg_proto, |
613b45b0 | 856 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1d5453d6 | 857 | "Received VRRP Advertisement from %s: %s", |
613b45b0 | 858 | r->vr->vrid, family2str(r->family), sipstr, dumpbuf); |
10133a59 QY |
859 | |
860 | /* Check that VRID matches our configured VRID */ | |
861 | if (pkt->hdr.vrid != r->vr->vrid) { | |
b637bcd4 | 862 | DEBUGD(&vrrp_dbg_proto, |
613b45b0 | 863 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
6cde4b45 | 864 | "Datagram invalid: Advertisement contains VRID %hhu which does not match our instance", |
b637bcd4 | 865 | r->vr->vrid, family2str(r->family), pkt->hdr.vrid); |
10133a59 QY |
866 | return -1; |
867 | } | |
868 | ||
869 | /* Verify that we are not the IPvX address owner */ | |
870 | if (r->is_owner) { | |
b637bcd4 | 871 | DEBUGD(&vrrp_dbg_proto, |
613b45b0 QY |
872 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
873 | "Datagram invalid: Received advertisement but we are the address owner", | |
b637bcd4 | 874 | r->vr->vrid, family2str(r->family)); |
10133a59 QY |
875 | return -1; |
876 | } | |
877 | ||
99966840 QY |
878 | /* If v2, verify that adver time matches ours */ |
879 | bool adveq = (pkt->hdr.v2.adver_int | |
880 | == MAX(r->vr->advertisement_interval / 100, 1)); | |
881 | if (r->vr->version == 2 && !adveq) { | |
b637bcd4 | 882 | DEBUGD(&vrrp_dbg_proto, |
613b45b0 | 883 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
6cde4b45 | 884 | "Datagram invalid: Received advertisement with advertisement interval %hhu unequal to our configured value %u", |
b637bcd4 QY |
885 | r->vr->vrid, family2str(r->family), |
886 | pkt->hdr.v2.adver_int, | |
887 | MAX(r->vr->advertisement_interval / 100, 1)); | |
99966840 QY |
888 | return -1; |
889 | } | |
890 | ||
891 | ||
10133a59 | 892 | /* Check that # IPs received matches our # configured IPs */ |
b637bcd4 QY |
893 | if (pkt->hdr.naddr != r->addrs->count) |
894 | DEBUGD(&vrrp_dbg_proto, | |
613b45b0 | 895 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
6cde4b45 | 896 | "Datagram has %hhu addresses, but this VRRP instance has %u", |
b637bcd4 QY |
897 | r->vr->vrid, family2str(r->family), pkt->hdr.naddr, |
898 | r->addrs->count); | |
10133a59 | 899 | |
6332c77f QY |
900 | ++r->stats.adver_rx_cnt; |
901 | ||
0f1f98e8 | 902 | int addrcmp; |
0f1f98e8 | 903 | |
10133a59 QY |
904 | switch (r->fsm.state) { |
905 | case VRRP_STATE_MASTER: | |
e920b0b2 | 906 | addrcmp = memcmp(&src->ip, &r->src.ip, IPADDRSZ(src)); |
0f1f98e8 | 907 | |
10133a59 QY |
908 | if (pkt->hdr.priority == 0) { |
909 | vrrp_send_advertisement(r); | |
910 | THREAD_OFF(r->t_adver_timer); | |
911 | thread_add_timer_msec( | |
912 | master, vrrp_adver_timer_expire, r, | |
de7fe61e | 913 | r->vr->advertisement_interval * CS2MS, |
10133a59 | 914 | &r->t_adver_timer); |
0f1f98e8 | 915 | } else if (pkt->hdr.priority > r->priority |
354b49d6 QY |
916 | || ((pkt->hdr.priority == r->priority) |
917 | && addrcmp > 0)) { | |
3708883c | 918 | zlog_info( |
613b45b0 | 919 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
6cde4b45 | 920 | "Received advertisement from %s w/ priority %hhu; switching to Backup", |
613b45b0 QY |
921 | r->vr->vrid, family2str(r->family), sipstr, |
922 | pkt->hdr.priority); | |
10133a59 | 923 | THREAD_OFF(r->t_adver_timer); |
99966840 QY |
924 | if (r->vr->version == 3) { |
925 | r->master_adver_interval = | |
926 | htons(pkt->hdr.v3.adver_int); | |
927 | } | |
10133a59 QY |
928 | vrrp_recalculate_timers(r); |
929 | THREAD_OFF(r->t_master_down_timer); | |
930 | thread_add_timer_msec(master, | |
931 | vrrp_master_down_timer_expire, r, | |
de7fe61e | 932 | r->master_down_interval * CS2MS, |
10133a59 QY |
933 | &r->t_master_down_timer); |
934 | vrrp_change_state(r, VRRP_STATE_BACKUP); | |
935 | } else { | |
936 | /* Discard advertisement */ | |
b637bcd4 | 937 | DEBUGD(&vrrp_dbg_proto, |
613b45b0 | 938 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
6cde4b45 | 939 | "Discarding advertisement from %s (%hhu <= %hhu & %s <= %s)", |
613b45b0 QY |
940 | r->vr->vrid, family2str(r->family), sipstr, |
941 | pkt->hdr.priority, r->priority, sipstr, dipstr); | |
10133a59 QY |
942 | } |
943 | break; | |
944 | case VRRP_STATE_BACKUP: | |
945 | if (pkt->hdr.priority == 0) { | |
946 | THREAD_OFF(r->t_master_down_timer); | |
947 | thread_add_timer_msec( | |
948 | master, vrrp_master_down_timer_expire, r, | |
de7fe61e | 949 | r->skew_time * CS2MS, &r->t_master_down_timer); |
a8f58eb6 | 950 | } else if (!r->vr->preempt_mode |
10133a59 | 951 | || pkt->hdr.priority >= r->priority) { |
99966840 QY |
952 | if (r->vr->version == 3) { |
953 | r->master_adver_interval = | |
954 | ntohs(pkt->hdr.v3.adver_int); | |
955 | } | |
10133a59 QY |
956 | vrrp_recalculate_timers(r); |
957 | THREAD_OFF(r->t_master_down_timer); | |
958 | thread_add_timer_msec(master, | |
959 | vrrp_master_down_timer_expire, r, | |
de7fe61e | 960 | r->master_down_interval * CS2MS, |
10133a59 | 961 | &r->t_master_down_timer); |
a8f58eb6 | 962 | } else if (r->vr->preempt_mode |
10133a59 QY |
963 | && pkt->hdr.priority < r->priority) { |
964 | /* Discard advertisement */ | |
b637bcd4 | 965 | DEBUGD(&vrrp_dbg_proto, |
613b45b0 | 966 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
6cde4b45 | 967 | "Discarding advertisement from %s (%hhu < %hhu & preempt = true)", |
613b45b0 QY |
968 | r->vr->vrid, family2str(r->family), sipstr, |
969 | pkt->hdr.priority, r->priority); | |
10133a59 QY |
970 | } |
971 | break; | |
972 | case VRRP_STATE_INITIALIZE: | |
613b45b0 | 973 | zlog_err(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
10133a59 | 974 | "Received ADVERTISEMENT in state %s; this is a bug", |
613b45b0 QY |
975 | r->vr->vrid, family2str(r->family), |
976 | vrrp_state_names[r->fsm.state]); | |
10133a59 QY |
977 | break; |
978 | } | |
979 | ||
980 | return 0; | |
91188ca6 QY |
981 | } |
982 | ||
983 | /* | |
984 | * Read and process next IPvX datagram. | |
985 | */ | |
986 | static int vrrp_read(struct thread *thread) | |
987 | { | |
988 | struct vrrp_router *r = thread->arg; | |
989 | ||
990 | struct vrrp_pkt *pkt; | |
991 | ssize_t pktsize; | |
992 | ssize_t nbytes; | |
993 | bool resched; | |
994 | char errbuf[BUFSIZ]; | |
fa211f1c | 995 | struct sockaddr_storage sa; |
91188ca6 | 996 | uint8_t control[64]; |
d04bb25a | 997 | struct ipaddr src = {}; |
91188ca6 | 998 | |
ab059def | 999 | struct msghdr m = {}; |
91188ca6 | 1000 | struct iovec iov; |
2fff50ec | 1001 | |
91188ca6 QY |
1002 | iov.iov_base = r->ibuf; |
1003 | iov.iov_len = sizeof(r->ibuf); | |
fa211f1c QY |
1004 | m.msg_name = &sa; |
1005 | m.msg_namelen = sizeof(sa); | |
91188ca6 QY |
1006 | m.msg_iov = &iov; |
1007 | m.msg_iovlen = 1; | |
1008 | m.msg_control = control; | |
1009 | m.msg_controllen = sizeof(control); | |
1010 | ||
dad18a2f | 1011 | nbytes = recvmsg(r->sock_rx, &m, MSG_DONTWAIT); |
91188ca6 QY |
1012 | |
1013 | if ((nbytes < 0 && ERRNO_IO_RETRY(errno))) { | |
1014 | resched = true; | |
1015 | goto done; | |
1016 | } else if (nbytes <= 0) { | |
1017 | vrrp_event(r, VRRP_EVENT_SHUTDOWN); | |
1018 | resched = false; | |
1019 | goto done; | |
1020 | } | |
1021 | ||
b637bcd4 QY |
1022 | if (DEBUG_MODE_CHECK(&vrrp_dbg_pkt, DEBUG_MODE_ALL)) { |
1023 | DEBUGD(&vrrp_dbg_pkt, | |
613b45b0 QY |
1024 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1025 | "Datagram rx: ", | |
b637bcd4 QY |
1026 | r->vr->vrid, family2str(r->family)); |
1027 | zlog_hexdump(r->ibuf, nbytes); | |
1028 | } | |
91188ca6 | 1029 | |
8cb3d803 QY |
1030 | pktsize = vrrp_pkt_parse_datagram(r->family, r->vr->version, &m, nbytes, |
1031 | &src, &pkt, errbuf, sizeof(errbuf)); | |
91188ca6 | 1032 | |
613b45b0 | 1033 | if (pktsize < 0) |
b637bcd4 | 1034 | DEBUGD(&vrrp_dbg_pkt, |
613b45b0 QY |
1035 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1036 | "Datagram invalid: %s", | |
b637bcd4 | 1037 | r->vr->vrid, family2str(r->family), errbuf); |
613b45b0 | 1038 | else |
0f1f98e8 | 1039 | vrrp_recv_advertisement(r, &src, pkt, pktsize); |
91188ca6 QY |
1040 | |
1041 | resched = true; | |
1042 | ||
1043 | done: | |
1044 | memset(r->ibuf, 0x00, sizeof(r->ibuf)); | |
1045 | ||
1046 | if (resched) | |
dad18a2f QY |
1047 | thread_add_read(master, vrrp_read, r, r->sock_rx, &r->t_read); |
1048 | ||
1049 | return 0; | |
1050 | } | |
1051 | ||
5435a2bf | 1052 | /* |
dad18a2f QY |
1053 | * Creates and configures VRRP router sockets. |
1054 | * | |
1055 | * This function: | |
1056 | * - Creates two sockets, one for Tx, one for Rx | |
490810d5 QY |
1057 | * - Binds the Tx socket to the macvlan device, if necessary (VRF case) |
1058 | * - Binds the Rx socket to the base interface | |
dad18a2f QY |
1059 | * - Joins the Rx socket to the appropriate VRRP multicast group |
1060 | * - Sets the Tx socket to set the TTL (v4) or Hop Limit (v6) field to 255 for | |
1061 | * all transmitted IPvX packets | |
1062 | * - Requests the kernel to deliver IPv6 header values needed to validate VRRP | |
1063 | * packets | |
dad18a2f QY |
1064 | * |
1065 | * If any of the above fail, the sockets are closed. The only exception is if | |
1066 | * the TTL / Hop Limit settings fail; these are logged, but configuration | |
1067 | * proceeds. | |
5435a2bf QY |
1068 | * |
1069 | * The first connected address on the Virtual Router's interface is used as the | |
1070 | * interface address. | |
1071 | * | |
862f2f37 QY |
1072 | * r |
1073 | * VRRP Router for which to create listen socket | |
dad18a2f QY |
1074 | * |
1075 | * Returns: | |
1076 | * 0 on success | |
1077 | * -1 on failure | |
5435a2bf | 1078 | */ |
862f2f37 | 1079 | static int vrrp_socket(struct vrrp_router *r) |
5435a2bf | 1080 | { |
5435a2bf | 1081 | int ret; |
91188ca6 | 1082 | bool failed = false; |
5435a2bf | 1083 | |
0cf6db21 | 1084 | frr_with_privs(&vrrp_privs) { |
444a06ea QY |
1085 | r->sock_rx = vrf_socket(r->family, SOCK_RAW, IPPROTO_VRRP, |
1086 | r->vr->ifp->vrf_id, NULL); | |
1087 | r->sock_tx = vrf_socket(r->family, SOCK_RAW, IPPROTO_VRRP, | |
1088 | r->vr->ifp->vrf_id, NULL); | |
5435a2bf QY |
1089 | } |
1090 | ||
dad18a2f QY |
1091 | if (r->sock_rx < 0 || r->sock_tx < 0) { |
1092 | const char *rxtx = r->sock_rx < 0 ? "Rx" : "Tx"; | |
2fff50ec | 1093 | |
613b45b0 QY |
1094 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1095 | "Can't create VRRP %s socket", | |
dad18a2f | 1096 | r->vr->vrid, family2str(r->family), rxtx); |
91188ca6 QY |
1097 | failed = true; |
1098 | goto done; | |
4ec94408 | 1099 | } |
40744000 | 1100 | |
490810d5 QY |
1101 | /* |
1102 | * Bind Tx socket to macvlan device - necessary for VRF support, | |
1103 | * otherwise the kernel will select the vrf device | |
1104 | */ | |
1105 | if (r->vr->ifp->vrf_id != VRF_DEFAULT) { | |
1106 | frr_with_privs (&vrrp_privs) { | |
1107 | ret = setsockopt(r->sock_tx, SOL_SOCKET, | |
1108 | SO_BINDTODEVICE, r->mvl_ifp->name, | |
1109 | strlen(r->mvl_ifp->name)); | |
1110 | } | |
1111 | ||
1112 | if (ret < 0) { | |
1113 | zlog_warn( | |
1114 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM | |
1115 | "Failed to bind Tx socket to macvlan device '%s'", | |
1116 | r->vr->vrid, family2str(r->family), | |
1117 | r->mvl_ifp->name); | |
1118 | failed = true; | |
1119 | goto done; | |
1120 | } | |
1121 | } | |
dad18a2f | 1122 | /* Configure sockets */ |
91188ca6 | 1123 | if (r->family == AF_INET) { |
dad18a2f | 1124 | /* Set Tx socket to always Tx with TTL set to 255 */ |
91188ca6 | 1125 | int ttl = 255; |
2fff50ec | 1126 | |
dad18a2f | 1127 | ret = setsockopt(r->sock_tx, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, |
91188ca6 QY |
1128 | sizeof(ttl)); |
1129 | if (ret < 0) { | |
1130 | zlog_warn( | |
613b45b0 | 1131 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
91188ca6 | 1132 | "Failed to set outgoing multicast TTL count to 255; RFC 5798 compliant implementations will drop our packets", |
613b45b0 | 1133 | r->vr->vrid, family2str(r->family)); |
91188ca6 QY |
1134 | } |
1135 | ||
6ad94d3a QY |
1136 | /* Set Tx socket DSCP byte */ |
1137 | setsockopt_ipv4_tos(r->sock_tx, IPTOS_PREC_INTERNETCONTROL); | |
1138 | ||
6e9529ed QY |
1139 | /* Turn off multicast loop on Tx */ |
1140 | setsockopt_ipv4_multicast_loop(r->sock_tx, 0); | |
1141 | ||
b523b241 | 1142 | /* Bind Rx socket to exact interface */ |
0cf6db21 | 1143 | frr_with_privs(&vrrp_privs) { |
b523b241 QY |
1144 | ret = setsockopt(r->sock_rx, SOL_SOCKET, |
1145 | SO_BINDTODEVICE, r->vr->ifp->name, | |
1146 | strlen(r->vr->ifp->name)); | |
1147 | } | |
b523b241 | 1148 | if (ret) { |
613b45b0 | 1149 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
b523b241 | 1150 | "Failed to bind Rx socket to %s: %s", |
613b45b0 QY |
1151 | r->vr->vrid, family2str(r->family), |
1152 | r->vr->ifp->name, safe_strerror(errno)); | |
b523b241 QY |
1153 | failed = true; |
1154 | goto done; | |
1155 | } | |
b637bcd4 | 1156 | DEBUGD(&vrrp_dbg_sock, |
613b45b0 QY |
1157 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1158 | "Bound Rx socket to %s", | |
1159 | r->vr->vrid, family2str(r->family), r->vr->ifp->name); | |
b523b241 QY |
1160 | |
1161 | /* Bind Rx socket to v4 multicast address */ | |
1162 | struct sockaddr_in sa = {0}; | |
2fff50ec | 1163 | |
b523b241 QY |
1164 | sa.sin_family = AF_INET; |
1165 | sa.sin_addr.s_addr = htonl(VRRP_MCASTV4_GROUP); | |
1166 | if (bind(r->sock_rx, (struct sockaddr *)&sa, sizeof(sa))) { | |
1167 | zlog_err( | |
613b45b0 QY |
1168 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1169 | "Failed to bind Rx socket to VRRP multicast group: %s", | |
b523b241 QY |
1170 | r->vr->vrid, family2str(r->family), |
1171 | safe_strerror(errno)); | |
1172 | failed = true; | |
1173 | goto done; | |
1174 | } | |
b637bcd4 | 1175 | DEBUGD(&vrrp_dbg_sock, |
613b45b0 QY |
1176 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1177 | "Bound Rx socket to VRRP multicast group", | |
b637bcd4 | 1178 | r->vr->vrid, family2str(r->family)); |
b523b241 | 1179 | |
dad18a2f | 1180 | /* Join Rx socket to VRRP IPv4 multicast group */ |
bdf16661 | 1181 | assert(listhead(r->vr->ifp->connected)); |
dad18a2f | 1182 | struct connected *c = listhead(r->vr->ifp->connected)->data; |
91188ca6 | 1183 | struct in_addr v4 = c->address->u.prefix4; |
2fff50ec | 1184 | |
dad18a2f QY |
1185 | ret = setsockopt_ipv4_multicast(r->sock_rx, IP_ADD_MEMBERSHIP, |
1186 | v4, htonl(VRRP_MCASTV4_GROUP), | |
862f2f37 | 1187 | r->vr->ifp->ifindex); |
b523b241 QY |
1188 | if (ret < 0) { |
1189 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID | |
1190 | "Failed to join VRRP %s multicast group", | |
1191 | r->vr->vrid, family2str(r->family)); | |
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 | "Joined VRRP multicast group", | |
b637bcd4 | 1198 | r->vr->vrid, family2str(r->family)); |
7e205b4a QY |
1199 | |
1200 | /* Set outgoing interface for advertisements */ | |
1201 | struct ip_mreqn mreqn = {}; | |
2fff50ec | 1202 | |
7e205b4a QY |
1203 | mreqn.imr_ifindex = r->mvl_ifp->ifindex; |
1204 | ret = setsockopt(r->sock_tx, IPPROTO_IP, IP_MULTICAST_IF, | |
1205 | (void *)&mreqn, sizeof(mreqn)); | |
1206 | if (ret < 0) { | |
1207 | zlog_warn( | |
613b45b0 | 1208 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
7e205b4a | 1209 | "Could not set %s as outgoing multicast interface", |
613b45b0 QY |
1210 | r->vr->vrid, family2str(r->family), |
1211 | r->mvl_ifp->name); | |
7e205b4a QY |
1212 | failed = true; |
1213 | goto done; | |
1214 | } | |
b637bcd4 | 1215 | DEBUGD(&vrrp_dbg_sock, |
613b45b0 | 1216 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
b637bcd4 | 1217 | "Set %s as outgoing multicast interface", |
613b45b0 | 1218 | r->vr->vrid, family2str(r->family), r->mvl_ifp->name); |
1760ce42 QY |
1219 | |
1220 | /* Select and bind source address */ | |
1221 | if (vrrp_bind_to_primary_connected(r) < 0) { | |
1222 | failed = true; | |
1223 | goto done; | |
1224 | } | |
1225 | ||
91188ca6 | 1226 | } else if (r->family == AF_INET6) { |
dad18a2f QY |
1227 | /* Always transmit IPv6 packets with hop limit set to 255 */ |
1228 | ret = setsockopt_ipv6_multicast_hops(r->sock_tx, 255); | |
91188ca6 QY |
1229 | if (ret < 0) { |
1230 | zlog_warn( | |
613b45b0 | 1231 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
91188ca6 | 1232 | "Failed to set outgoing multicast hop count to 255; RFC 5798 compliant implementations will drop our packets", |
613b45b0 | 1233 | r->vr->vrid, family2str(r->family)); |
91188ca6 | 1234 | } |
d04bb25a | 1235 | |
6ad94d3a QY |
1236 | /* Set Tx socket DSCP byte */ |
1237 | setsockopt_ipv6_tclass(r->sock_tx, IPTOS_PREC_INTERNETCONTROL); | |
1238 | ||
d04bb25a QY |
1239 | /* Request hop limit delivery */ |
1240 | setsockopt_ipv6_hoplimit(r->sock_rx, 1); | |
91188ca6 | 1241 | if (ret < 0) { |
613b45b0 | 1242 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
91188ca6 | 1243 | "Failed to request IPv6 Hop Limit delivery", |
613b45b0 | 1244 | r->vr->vrid, family2str(r->family)); |
91188ca6 QY |
1245 | failed = true; |
1246 | goto done; | |
1247 | } | |
1248 | ||
6e9529ed QY |
1249 | /* Turn off multicast loop on Tx */ |
1250 | setsockopt_ipv6_multicast_loop(r->sock_tx, 0); | |
1251 | ||
b523b241 | 1252 | /* Bind Rx socket to exact interface */ |
0cf6db21 | 1253 | frr_with_privs(&vrrp_privs) { |
b523b241 QY |
1254 | ret = setsockopt(r->sock_rx, SOL_SOCKET, |
1255 | SO_BINDTODEVICE, r->vr->ifp->name, | |
1256 | strlen(r->vr->ifp->name)); | |
1257 | } | |
b523b241 | 1258 | if (ret) { |
613b45b0 | 1259 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
b523b241 | 1260 | "Failed to bind Rx socket to %s: %s", |
613b45b0 QY |
1261 | r->vr->vrid, family2str(r->family), |
1262 | r->vr->ifp->name, safe_strerror(errno)); | |
b523b241 QY |
1263 | failed = true; |
1264 | goto done; | |
1265 | } | |
b637bcd4 | 1266 | DEBUGD(&vrrp_dbg_sock, |
613b45b0 QY |
1267 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1268 | "Bound Rx socket to %s", | |
1269 | r->vr->vrid, family2str(r->family), r->vr->ifp->name); | |
b523b241 QY |
1270 | |
1271 | /* Bind Rx socket to v6 multicast address */ | |
1272 | struct sockaddr_in6 sa = {0}; | |
2fff50ec | 1273 | |
b523b241 QY |
1274 | sa.sin6_family = AF_INET6; |
1275 | inet_pton(AF_INET6, VRRP_MCASTV6_GROUP_STR, &sa.sin6_addr); | |
1276 | if (bind(r->sock_rx, (struct sockaddr *)&sa, sizeof(sa))) { | |
1277 | zlog_err( | |
613b45b0 QY |
1278 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1279 | "Failed to bind Rx socket to VRRP multicast group: %s", | |
b523b241 QY |
1280 | r->vr->vrid, family2str(r->family), |
1281 | safe_strerror(errno)); | |
1282 | failed = true; | |
1283 | goto done; | |
1284 | } | |
b637bcd4 | 1285 | DEBUGD(&vrrp_dbg_sock, |
613b45b0 QY |
1286 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1287 | "Bound Rx socket to VRRP multicast group", | |
b637bcd4 | 1288 | r->vr->vrid, family2str(r->family)); |
b523b241 | 1289 | |
91188ca6 | 1290 | /* Join VRRP IPv6 multicast group */ |
862f2f37 | 1291 | struct ipv6_mreq mreq; |
2fff50ec | 1292 | |
dad18a2f QY |
1293 | inet_pton(AF_INET6, VRRP_MCASTV6_GROUP_STR, |
1294 | &mreq.ipv6mr_multiaddr); | |
862f2f37 | 1295 | mreq.ipv6mr_interface = r->vr->ifp->ifindex; |
dad18a2f QY |
1296 | ret = setsockopt(r->sock_rx, IPPROTO_IPV6, IPV6_JOIN_GROUP, |
1297 | &mreq, sizeof(mreq)); | |
b523b241 | 1298 | if (ret < 0) { |
613b45b0 QY |
1299 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1300 | "Failed to join VRRP multicast group", | |
b523b241 QY |
1301 | r->vr->vrid, family2str(r->family)); |
1302 | failed = true; | |
1303 | goto done; | |
1304 | } | |
b637bcd4 | 1305 | DEBUGD(&vrrp_dbg_sock, |
613b45b0 QY |
1306 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1307 | "Joined VRRP multicast group", | |
b637bcd4 | 1308 | r->vr->vrid, family2str(r->family)); |
7e205b4a QY |
1309 | |
1310 | /* Set outgoing interface for advertisements */ | |
1311 | ret = setsockopt(r->sock_tx, IPPROTO_IPV6, IPV6_MULTICAST_IF, | |
1312 | &r->mvl_ifp->ifindex, sizeof(ifindex_t)); | |
1313 | if (ret < 0) { | |
1314 | zlog_warn( | |
613b45b0 | 1315 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
7e205b4a | 1316 | "Could not set %s as outgoing multicast interface", |
613b45b0 QY |
1317 | r->vr->vrid, family2str(r->family), |
1318 | r->mvl_ifp->name); | |
7e205b4a QY |
1319 | failed = true; |
1320 | goto done; | |
1321 | } | |
b637bcd4 | 1322 | DEBUGD(&vrrp_dbg_sock, |
613b45b0 | 1323 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
b637bcd4 | 1324 | "Set %s as outgoing multicast interface", |
613b45b0 | 1325 | r->vr->vrid, family2str(r->family), r->mvl_ifp->name); |
862f2f37 QY |
1326 | } |
1327 | ||
91188ca6 QY |
1328 | done: |
1329 | ret = 0; | |
1330 | if (failed) { | |
613b45b0 QY |
1331 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1332 | "Failed to initialize VRRP router", | |
91188ca6 | 1333 | r->vr->vrid, family2str(r->family)); |
1b5e2a22 | 1334 | if (r->sock_rx >= 0) { |
dad18a2f | 1335 | close(r->sock_rx); |
1b5e2a22 QY |
1336 | r->sock_rx = -1; |
1337 | } | |
1338 | if (r->sock_tx >= 0) { | |
dad18a2f | 1339 | close(r->sock_tx); |
1b5e2a22 QY |
1340 | r->sock_tx = -1; |
1341 | } | |
91188ca6 QY |
1342 | ret = -1; |
1343 | } | |
1344 | ||
1345 | return ret; | |
5435a2bf QY |
1346 | } |
1347 | ||
1348 | ||
1349 | /* State machine ----------------------------------------------------------- */ | |
1350 | ||
2fff50ec | 1351 | DEFINE_HOOK(vrrp_change_state_hook, (struct vrrp_router *r, int to), (r, to)); |
5435a2bf QY |
1352 | |
1353 | /* | |
1354 | * Handle any necessary actions during state change to MASTER state. | |
1355 | * | |
862f2f37 QY |
1356 | * r |
1357 | * VRRP Router to operate on | |
5435a2bf | 1358 | */ |
862f2f37 | 1359 | static void vrrp_change_state_master(struct vrrp_router *r) |
5435a2bf | 1360 | { |
f3fe0047 QY |
1361 | /* Enable ND Router Advertisements */ |
1362 | if (r->family == AF_INET6) | |
1363 | vrrp_zebra_radv_set(r, true); | |
c3bd894e | 1364 | |
ee5aabb6 | 1365 | /* Set protodown off */ |
c3bd894e | 1366 | vrrp_zclient_send_interface_protodown(r->mvl_ifp, false); |
ee5aabb6 QY |
1367 | |
1368 | /* | |
1369 | * If protodown is already off, we can send our stuff, otherwise we | |
1370 | * have to delay until the interface is all the way up | |
1371 | */ | |
1372 | if (if_is_operative(r->mvl_ifp)) { | |
1373 | vrrp_send_advertisement(r); | |
1374 | ||
1375 | if (r->family == AF_INET) | |
1376 | vrrp_garp_send_all(r); | |
1377 | else if (r->family == AF_INET6) | |
1378 | vrrp_ndisc_una_send_all(r); | |
1379 | } else { | |
1380 | DEBUGD(&vrrp_dbg_proto, | |
613b45b0 | 1381 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
ee5aabb6 | 1382 | "Delaying VRRP advertisement until interface is up", |
613b45b0 | 1383 | r->vr->vrid, family2str(r->family)); |
ee5aabb6 QY |
1384 | r->advert_pending = true; |
1385 | ||
1386 | if (r->family == AF_INET) { | |
1387 | DEBUGD(&vrrp_dbg_proto, | |
613b45b0 | 1388 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
ee5aabb6 | 1389 | "Delaying VRRP gratuitous ARPs until interface is up", |
613b45b0 | 1390 | r->vr->vrid, family2str(r->family)); |
ee5aabb6 QY |
1391 | r->garp_pending = true; |
1392 | } else if (r->family == AF_INET6) { | |
1393 | DEBUGD(&vrrp_dbg_proto, | |
613b45b0 | 1394 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
ee5aabb6 | 1395 | "Delaying VRRP unsolicited neighbor advertisement until interface is up", |
613b45b0 | 1396 | r->vr->vrid, family2str(r->family)); |
ee5aabb6 QY |
1397 | r->ndisc_pending = true; |
1398 | } | |
1399 | } | |
5435a2bf QY |
1400 | } |
1401 | ||
1402 | /* | |
1403 | * Handle any necessary actions during state change to BACKUP state. | |
1404 | * | |
862f2f37 | 1405 | * r |
5435a2bf QY |
1406 | * Virtual Router to operate on |
1407 | */ | |
862f2f37 | 1408 | static void vrrp_change_state_backup(struct vrrp_router *r) |
5435a2bf | 1409 | { |
f3fe0047 QY |
1410 | /* Disable ND Router Advertisements */ |
1411 | if (r->family == AF_INET6) | |
1412 | vrrp_zebra_radv_set(r, false); | |
c3bd894e | 1413 | |
45505f63 QY |
1414 | /* Disable Adver_Timer */ |
1415 | THREAD_OFF(r->t_adver_timer); | |
1416 | ||
d60b2ffd QY |
1417 | r->advert_pending = false; |
1418 | r->garp_pending = false; | |
1419 | r->ndisc_pending = false; | |
958b1487 | 1420 | memset(&r->src, 0x00, sizeof(r->src)); |
d60b2ffd | 1421 | |
c3bd894e | 1422 | vrrp_zclient_send_interface_protodown(r->mvl_ifp, true); |
5435a2bf QY |
1423 | } |
1424 | ||
1425 | /* | |
1426 | * Handle any necessary actions during state change to INITIALIZE state. | |
1427 | * | |
1428 | * This is not called for initial startup, only when transitioning from MASTER | |
1429 | * or BACKUP. | |
1430 | * | |
862f2f37 QY |
1431 | * r |
1432 | * VRRP Router to operate on | |
5435a2bf | 1433 | */ |
862f2f37 | 1434 | static void vrrp_change_state_initialize(struct vrrp_router *r) |
5435a2bf | 1435 | { |
862f2f37 QY |
1436 | r->master_adver_interval = 0; |
1437 | vrrp_recalculate_timers(r); | |
f3fe0047 | 1438 | |
d60b2ffd QY |
1439 | r->advert_pending = false; |
1440 | r->garp_pending = false; | |
1441 | r->ndisc_pending = false; | |
1442 | ||
f3fe0047 | 1443 | /* Disable ND Router Advertisements */ |
9323f278 | 1444 | if (r->family == AF_INET6 && r->mvl_ifp) |
f3fe0047 | 1445 | vrrp_zebra_radv_set(r, false); |
5435a2bf QY |
1446 | } |
1447 | ||
2b64873d | 1448 | void (*const vrrp_change_state_handlers[])(struct vrrp_router *vr) = { |
5435a2bf QY |
1449 | [VRRP_STATE_MASTER] = vrrp_change_state_master, |
1450 | [VRRP_STATE_BACKUP] = vrrp_change_state_backup, | |
1451 | [VRRP_STATE_INITIALIZE] = vrrp_change_state_initialize, | |
1452 | }; | |
1453 | ||
1454 | /* | |
1455 | * Change Virtual Router FSM position. Handles transitional actions and calls | |
1456 | * any subscribers to the state change hook. | |
1457 | * | |
862f2f37 | 1458 | * r |
5435a2bf QY |
1459 | * Virtual Router for which to change state |
1460 | * | |
1461 | * to | |
1462 | * State to change to | |
1463 | */ | |
862f2f37 | 1464 | static void vrrp_change_state(struct vrrp_router *r, int to) |
5435a2bf | 1465 | { |
6287cefe QY |
1466 | if (r->fsm.state == to) |
1467 | return; | |
1468 | ||
5435a2bf | 1469 | /* Call our handlers, then any subscribers */ |
862f2f37 QY |
1470 | vrrp_change_state_handlers[to](r); |
1471 | hook_call(vrrp_change_state_hook, r, to); | |
613b45b0 QY |
1472 | zlog_info(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM "%s -> %s", |
1473 | r->vr->vrid, family2str(r->family), | |
862f2f37 QY |
1474 | vrrp_state_names[r->fsm.state], vrrp_state_names[to]); |
1475 | r->fsm.state = to; | |
6332c77f QY |
1476 | |
1477 | ++r->stats.trans_cnt; | |
5435a2bf QY |
1478 | } |
1479 | ||
1480 | /* | |
1481 | * Called when Adver_Timer expires. | |
1482 | */ | |
1483 | static int vrrp_adver_timer_expire(struct thread *thread) | |
1484 | { | |
862f2f37 | 1485 | struct vrrp_router *r = thread->arg; |
5435a2bf | 1486 | |
b637bcd4 | 1487 | DEBUGD(&vrrp_dbg_proto, |
613b45b0 QY |
1488 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1489 | "Adver_Timer expired", | |
1490 | r->vr->vrid, family2str(r->family)); | |
4ec94408 | 1491 | |
862f2f37 | 1492 | if (r->fsm.state == VRRP_STATE_MASTER) { |
3e7a4043 | 1493 | /* Send an ADVERTISEMENT */ |
862f2f37 | 1494 | vrrp_send_advertisement(r); |
5435a2bf | 1495 | |
3e7a4043 | 1496 | /* Reset the Adver_Timer to Advertisement_Interval */ |
862f2f37 | 1497 | thread_add_timer_msec(master, vrrp_adver_timer_expire, r, |
de7fe61e | 1498 | r->vr->advertisement_interval * CS2MS, |
862f2f37 | 1499 | &r->t_adver_timer); |
3e7a4043 | 1500 | } else { |
613b45b0 | 1501 | zlog_err(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
b637bcd4 | 1502 | "Adver_Timer expired in state '%s'; this is a bug", |
613b45b0 QY |
1503 | r->vr->vrid, family2str(r->family), |
1504 | vrrp_state_names[r->fsm.state]); | |
5435a2bf | 1505 | } |
3e7a4043 | 1506 | |
5435a2bf QY |
1507 | return 0; |
1508 | } | |
1509 | ||
1510 | /* | |
4ec94408 | 1511 | * Called when Master_Down_Timer expires. |
5435a2bf QY |
1512 | */ |
1513 | static int vrrp_master_down_timer_expire(struct thread *thread) | |
1514 | { | |
862f2f37 | 1515 | struct vrrp_router *r = thread->arg; |
4ec94408 | 1516 | |
613b45b0 QY |
1517 | zlog_info(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1518 | "Master_Down_Timer expired", | |
1519 | r->vr->vrid, family2str(r->family)); | |
5435a2bf | 1520 | |
c7e3b83d | 1521 | thread_add_timer_msec(master, vrrp_adver_timer_expire, r, |
de7fe61e | 1522 | r->vr->advertisement_interval * CS2MS, |
c7e3b83d QY |
1523 | &r->t_adver_timer); |
1524 | vrrp_change_state(r, VRRP_STATE_MASTER); | |
1525 | ||
5435a2bf QY |
1526 | return 0; |
1527 | } | |
1528 | ||
1529 | /* | |
1530 | * Event handler for Startup event. | |
1531 | * | |
1532 | * Creates sockets, sends advertisements and ARP requests, starts timers, | |
1d21789e QY |
1533 | * and transitions the Virtual Router to either Master or Backup states. |
1534 | * | |
1535 | * This function will also initialize the program's global ARP subsystem if it | |
1536 | * has not yet been initialized. | |
5435a2bf | 1537 | * |
862f2f37 QY |
1538 | * r |
1539 | * VRRP Router on which to apply Startup event | |
1d21789e QY |
1540 | * |
1541 | * Returns: | |
1542 | * < 0 if the session socket could not be created, or the state is not | |
1543 | * Initialize | |
1544 | * 0 on success | |
5435a2bf | 1545 | */ |
862f2f37 | 1546 | static int vrrp_startup(struct vrrp_router *r) |
5435a2bf | 1547 | { |
1d21789e | 1548 | /* May only be called when the state is Initialize */ |
862f2f37 | 1549 | if (r->fsm.state != VRRP_STATE_INITIALIZE) |
1d21789e QY |
1550 | return -1; |
1551 | ||
7e205b4a | 1552 | /* Must have a valid macvlan interface available */ |
85467974 | 1553 | if (r->mvl_ifp == NULL && !vrrp_attach_interface(r)) { |
613b45b0 QY |
1554 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1555 | "No appropriate interface found", | |
7e205b4a QY |
1556 | r->vr->vrid, family2str(r->family)); |
1557 | return -1; | |
1558 | } | |
1559 | ||
40744000 | 1560 | /* Initialize global gratuitous ARP socket if necessary */ |
862f2f37 | 1561 | if (r->family == AF_INET && !vrrp_garp_is_init()) |
40744000 | 1562 | vrrp_garp_init(); |
4f52e9a6 QY |
1563 | if (r->family == AF_INET6 && !vrrp_ndisc_is_init()) |
1564 | vrrp_ndisc_init(); | |
40744000 | 1565 | |
5435a2bf | 1566 | /* Create socket */ |
dad18a2f | 1567 | if (r->sock_rx < 0 || r->sock_tx < 0) { |
862f2f37 | 1568 | int ret = vrrp_socket(r); |
2fff50ec | 1569 | |
dad18a2f | 1570 | if (ret < 0 || r->sock_tx < 0 || r->sock_rx < 0) |
862f2f37 QY |
1571 | return ret; |
1572 | } | |
5435a2bf QY |
1573 | |
1574 | /* Schedule listener */ | |
dad18a2f | 1575 | thread_add_read(master, vrrp_read, r, r->sock_rx, &r->t_read); |
5435a2bf | 1576 | |
91188ca6 | 1577 | /* Configure effective priority */ |
bdf16661 | 1578 | assert(listhead(r->addrs)); |
862f2f37 | 1579 | struct ipaddr *primary = (struct ipaddr *)listhead(r->addrs)->data; |
862f2f37 | 1580 | char ipbuf[INET6_ADDRSTRLEN]; |
2fff50ec | 1581 | |
862f2f37 QY |
1582 | inet_ntop(r->family, &primary->ip.addr, ipbuf, sizeof(ipbuf)); |
1583 | ||
2f1fc30f QY |
1584 | if (r->vr->priority == VRRP_PRIO_MASTER |
1585 | || vrrp_is_owner(r->vr->ifp, primary)) { | |
862f2f37 QY |
1586 | r->priority = VRRP_PRIO_MASTER; |
1587 | vrrp_recalculate_timers(r); | |
1588 | ||
5d3730c5 | 1589 | zlog_info( |
613b45b0 | 1590 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
2f1fc30f | 1591 | "%s has priority set to 255 or owns primary Virtual Router IP %s; electing self as Master", |
613b45b0 QY |
1592 | r->vr->vrid, family2str(r->family), r->vr->ifp->name, |
1593 | ipbuf); | |
5d3730c5 QY |
1594 | } |
1595 | ||
862f2f37 | 1596 | if (r->priority == VRRP_PRIO_MASTER) { |
862f2f37 | 1597 | thread_add_timer_msec(master, vrrp_adver_timer_expire, r, |
de7fe61e | 1598 | r->vr->advertisement_interval * CS2MS, |
862f2f37 QY |
1599 | &r->t_adver_timer); |
1600 | vrrp_change_state(r, VRRP_STATE_MASTER); | |
5435a2bf | 1601 | } else { |
862f2f37 QY |
1602 | r->master_adver_interval = r->vr->advertisement_interval; |
1603 | vrrp_recalculate_timers(r); | |
1604 | thread_add_timer_msec(master, vrrp_master_down_timer_expire, r, | |
de7fe61e | 1605 | r->master_down_interval * CS2MS, |
862f2f37 QY |
1606 | &r->t_master_down_timer); |
1607 | vrrp_change_state(r, VRRP_STATE_BACKUP); | |
5435a2bf | 1608 | } |
a8144d7f | 1609 | |
862f2f37 QY |
1610 | r->is_active = true; |
1611 | ||
a8144d7f | 1612 | return 0; |
5435a2bf QY |
1613 | } |
1614 | ||
1d21789e QY |
1615 | /* |
1616 | * Shuts down a Virtual Router and transitions it to Initialize. | |
1617 | * | |
1618 | * This call must be idempotent; it is safe to call multiple times on the same | |
862f2f37 | 1619 | * VRRP Router. |
1d21789e | 1620 | */ |
862f2f37 | 1621 | static int vrrp_shutdown(struct vrrp_router *r) |
5435a2bf | 1622 | { |
45505f63 QY |
1623 | uint8_t saved_prio; |
1624 | ||
862f2f37 QY |
1625 | switch (r->fsm.state) { |
1626 | case VRRP_STATE_MASTER: | |
862f2f37 | 1627 | /* Send an ADVERTISEMENT with Priority = 0 */ |
45505f63 | 1628 | saved_prio = r->priority; |
862f2f37 QY |
1629 | r->priority = 0; |
1630 | vrrp_send_advertisement(r); | |
1631 | r->priority = saved_prio; | |
1632 | break; | |
1633 | case VRRP_STATE_BACKUP: | |
862f2f37 QY |
1634 | break; |
1635 | case VRRP_STATE_INITIALIZE: | |
b637bcd4 | 1636 | DEBUGD(&vrrp_dbg_proto, |
613b45b0 | 1637 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
b637bcd4 | 1638 | "Received '%s' event in '%s' state; ignoring", |
613b45b0 QY |
1639 | r->vr->vrid, family2str(r->family), |
1640 | vrrp_event_names[VRRP_EVENT_SHUTDOWN], | |
b637bcd4 | 1641 | vrrp_state_names[VRRP_STATE_INITIALIZE]); |
2681134b | 1642 | return 0; |
3e7a4043 QY |
1643 | } |
1644 | ||
45505f63 QY |
1645 | /* Cancel all timers */ |
1646 | THREAD_OFF(r->t_adver_timer); | |
1647 | THREAD_OFF(r->t_master_down_timer); | |
a90edf08 QY |
1648 | THREAD_OFF(r->t_read); |
1649 | THREAD_OFF(r->t_write); | |
45505f63 | 1650 | |
4d2ea6bf | 1651 | /* Protodown macvlan */ |
9323f278 QY |
1652 | if (r->mvl_ifp) |
1653 | vrrp_zclient_send_interface_protodown(r->mvl_ifp, true); | |
4d2ea6bf | 1654 | |
958b1487 QY |
1655 | /* Throw away our source address */ |
1656 | memset(&r->src, 0x00, sizeof(r->src)); | |
1657 | ||
b7dc1bbb QY |
1658 | if (r->sock_rx > 0) { |
1659 | close(r->sock_rx); | |
1660 | r->sock_rx = -1; | |
1661 | } | |
1662 | if (r->sock_tx > 0) { | |
1663 | close(r->sock_tx); | |
1664 | r->sock_tx = -1; | |
1665 | } | |
1666 | ||
862f2f37 | 1667 | vrrp_change_state(r, VRRP_STATE_INITIALIZE); |
1d21789e | 1668 | |
73b5cb19 QY |
1669 | r->is_active = false; |
1670 | ||
a8144d7f | 1671 | return 0; |
5435a2bf QY |
1672 | } |
1673 | ||
2b64873d | 1674 | static int (*const vrrp_event_handlers[])(struct vrrp_router *r) = { |
5435a2bf QY |
1675 | [VRRP_EVENT_STARTUP] = vrrp_startup, |
1676 | [VRRP_EVENT_SHUTDOWN] = vrrp_shutdown, | |
1677 | }; | |
1678 | ||
1679 | /* | |
862f2f37 | 1680 | * Spawn a VRRP FSM event on a VRRP Router. |
5435a2bf QY |
1681 | * |
1682 | * vr | |
862f2f37 | 1683 | * VRRP Router on which to spawn event |
5435a2bf QY |
1684 | * |
1685 | * event | |
1686 | * The event to spawn | |
27fd8827 QY |
1687 | * |
1688 | * Returns: | |
1689 | * -1 on failure | |
1690 | * 0 otherwise | |
5435a2bf | 1691 | */ |
862f2f37 | 1692 | int vrrp_event(struct vrrp_router *r, int event) |
5435a2bf | 1693 | { |
613b45b0 QY |
1694 | zlog_info(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM "'%s' event", |
1695 | r->vr->vrid, family2str(r->family), vrrp_event_names[event]); | |
862f2f37 | 1696 | return vrrp_event_handlers[event](r); |
5435a2bf QY |
1697 | } |
1698 | ||
1699 | ||
27fd8827 QY |
1700 | /* Autoconfig -------------------------------------------------------------- */ |
1701 | ||
1702 | /* | |
1703 | * Set the configured addresses for this VRRP instance to exactly the addresses | |
1704 | * present on its macvlan subinterface(s). | |
1705 | * | |
1706 | * vr | |
1707 | * VRRP router to act on | |
1708 | */ | |
ac1429b9 | 1709 | static void vrrp_autoconfig_autoaddrupdate(struct vrrp_router *r) |
27fd8827 | 1710 | { |
27fd8827 QY |
1711 | struct listnode *ln; |
1712 | struct connected *c = NULL; | |
ac1429b9 | 1713 | bool is_v6_ll; |
27fd8827 | 1714 | |
ac1429b9 QY |
1715 | if (!r->mvl_ifp) |
1716 | return; | |
27fd8827 | 1717 | |
ac1429b9 | 1718 | DEBUGD(&vrrp_dbg_auto, |
613b45b0 QY |
1719 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1720 | "Setting Virtual IP list to match IPv4 addresses on %s", | |
ac1429b9 QY |
1721 | r->vr->vrid, family2str(r->family), r->mvl_ifp->name); |
1722 | for (ALL_LIST_ELEMENTS_RO(r->mvl_ifp->connected, ln, c)) { | |
1723 | is_v6_ll = (c->address->family == AF_INET6 | |
1724 | && IN6_IS_ADDR_LINKLOCAL(&c->address->u.prefix6)); | |
1725 | if (c->address->family == r->family && !is_v6_ll) { | |
ac1429b9 | 1726 | DEBUGD(&vrrp_dbg_auto, |
613b45b0 | 1727 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
26b6d034 PR |
1728 | "Adding %pFX", |
1729 | r->vr->vrid, family2str(r->family), c->address); | |
ac1429b9 QY |
1730 | if (r->family == AF_INET) |
1731 | vrrp_add_ipv4(r->vr, c->address->u.prefix4); | |
359c72ba | 1732 | else if (r->vr->version == 3) |
ac1429b9 QY |
1733 | vrrp_add_ipv6(r->vr, c->address->u.prefix6); |
1734 | } | |
b637bcd4 | 1735 | } |
27fd8827 | 1736 | |
ac1429b9 | 1737 | vrrp_check_start(r->vr); |
6e93585e | 1738 | |
ac1429b9 | 1739 | if (r->addrs->count == 0 && r->fsm.state != VRRP_STATE_INITIALIZE) { |
b637bcd4 | 1740 | DEBUGD(&vrrp_dbg_auto, |
613b45b0 QY |
1741 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1742 | "Virtual IP list is empty; shutting down", | |
ac1429b9 QY |
1743 | r->vr->vrid, family2str(r->family)); |
1744 | vrrp_event(r, VRRP_EVENT_SHUTDOWN); | |
b637bcd4 | 1745 | } |
27fd8827 | 1746 | } |
5435a2bf | 1747 | |
53e60e5c QY |
1748 | static struct vrrp_vrouter * |
1749 | vrrp_autoconfig_autocreate(struct interface *mvl_ifp) | |
1750 | { | |
1751 | struct interface *p; | |
1752 | struct vrrp_vrouter *vr; | |
1753 | ||
490810d5 | 1754 | p = if_lookup_by_index(mvl_ifp->link_ifindex, mvl_ifp->vrf_id); |
27fd8827 QY |
1755 | |
1756 | if (!p) | |
1757 | return NULL; | |
1758 | ||
53e60e5c | 1759 | uint8_t vrid = mvl_ifp->hw_addr[5]; |
613b45b0 | 1760 | uint8_t fam = mvl_ifp->hw_addr[4]; |
53e60e5c | 1761 | |
00984df7 | 1762 | DEBUGD(&vrrp_dbg_auto, |
613b45b0 QY |
1763 | VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1764 | "Autoconfiguring VRRP on %s", | |
1765 | vrid, family2str(fam), p->name); | |
53e60e5c | 1766 | |
53e60e5c QY |
1767 | vr = vrrp_vrouter_create(p, vrid, vrrp_autoconfig_version); |
1768 | ||
27fd8827 | 1769 | if (!vr) { |
613b45b0 QY |
1770 | zlog_warn(VRRP_LOGPFX VRRP_LOGPFX_VRID VRRP_LOGPFX_FAM |
1771 | "Failed to autoconfigure VRRP on %s", | |
1772 | vrid, family2str(fam), p->name); | |
53e60e5c | 1773 | return NULL; |
27fd8827 | 1774 | } |
53e60e5c | 1775 | |
d37281cb QY |
1776 | vr->autoconf = true; |
1777 | ||
1778 | /* | |
1779 | * If these interfaces are protodown on, we need to un-protodown them | |
1780 | * in order to get Zebra to send us their addresses so we can | |
1781 | * autoconfigure them. | |
1782 | */ | |
1783 | if (vr->v4->mvl_ifp) | |
1784 | vrrp_zclient_send_interface_protodown(vr->v4->mvl_ifp, false); | |
1785 | if (vr->v6->mvl_ifp) | |
1786 | vrrp_zclient_send_interface_protodown(vr->v6->mvl_ifp, false); | |
1787 | ||
1788 | /* If they're not, we can go ahead and add the addresses we have */ | |
ac1429b9 QY |
1789 | vrrp_autoconfig_autoaddrupdate(vr->v4); |
1790 | vrrp_autoconfig_autoaddrupdate(vr->v6); | |
53e60e5c | 1791 | |
53e60e5c QY |
1792 | return vr; |
1793 | } | |
1794 | ||
6e93585e QY |
1795 | /* |
1796 | * Callback to notify autoconfig of interface add. | |
1797 | * | |
1798 | * If the interface is a VRRP-compatible device, and there is no existing VRRP | |
1799 | * router running on it, one is created. All addresses on the interface are | |
1800 | * added to the router. | |
1801 | * | |
1802 | * ifp | |
1803 | * Interface to operate on | |
1804 | * | |
1805 | * Returns: | |
1806 | * -1 on failure | |
1807 | * 0 otherwise | |
1808 | */ | |
1809 | static int vrrp_autoconfig_if_add(struct interface *ifp) | |
27fd8827 | 1810 | { |
2198a5bb QY |
1811 | bool created = false; |
1812 | struct vrrp_vrouter *vr; | |
1813 | ||
27fd8827 QY |
1814 | if (!vrrp_autoconfig_is_on) |
1815 | return 0; | |
1816 | ||
27fd8827 QY |
1817 | if (!ifp || !ifp->link_ifindex || !vrrp_ifp_has_vrrp_mac(ifp)) |
1818 | return -1; | |
1819 | ||
6e93585e | 1820 | vr = vrrp_lookup_by_if_mvl(ifp); |
27fd8827 | 1821 | |
2198a5bb | 1822 | if (!vr) { |
27fd8827 | 1823 | vr = vrrp_autoconfig_autocreate(ifp); |
d37281cb | 1824 | created = true; |
2198a5bb | 1825 | } |
27fd8827 | 1826 | |
a8f58eb6 | 1827 | if (!vr || !vr->autoconf) |
27fd8827 | 1828 | return 0; |
d37281cb QY |
1829 | |
1830 | if (!created) { | |
1831 | /* | |
1832 | * We didn't create it, but it has already been autoconfigured. | |
1833 | * Try to attach this interface to the existing instance. | |
1834 | */ | |
1835 | if (!vr->v4->mvl_ifp) { | |
1836 | vrrp_attach_interface(vr->v4); | |
1837 | /* If we just attached it, make sure it's turned on */ | |
1838 | if (vr->v4->mvl_ifp) { | |
1839 | vrrp_zclient_send_interface_protodown( | |
1840 | vr->v4->mvl_ifp, false); | |
1841 | /* | |
1842 | * If it's already up, we can go ahead and add | |
1843 | * the addresses we have | |
1844 | */ | |
1845 | vrrp_autoconfig_autoaddrupdate(vr->v4); | |
1846 | } | |
1847 | } | |
1848 | if (!vr->v6->mvl_ifp) { | |
1849 | vrrp_attach_interface(vr->v6); | |
1850 | /* If we just attached it, make sure it's turned on */ | |
1851 | if (vr->v6->mvl_ifp) { | |
1852 | vrrp_zclient_send_interface_protodown( | |
1853 | vr->v6->mvl_ifp, false); | |
1854 | /* | |
1855 | * If it's already up, we can go ahead and add | |
1856 | * the addresses we have | |
1857 | */ | |
1858 | vrrp_autoconfig_autoaddrupdate(vr->v6); | |
1859 | } | |
1860 | } | |
27fd8827 QY |
1861 | } |
1862 | ||
1863 | return 0; | |
1864 | } | |
1865 | ||
6e93585e QY |
1866 | /* |
1867 | * Callback to notify autoconfig of interface delete. | |
1868 | * | |
1869 | * If the interface is a VRRP-compatible device, and a VRRP router is running | |
1870 | * on it, and that VRRP router was automatically configured, it will be | |
1871 | * deleted. If that was the last router for the corresponding VRID (i.e., if | |
1872 | * this interface was a v4 VRRP interface and no v6 router is configured for | |
1873 | * the same VRID) then the entire virtual router is deleted. | |
1874 | * | |
1875 | * ifp | |
1876 | * Interface to operate on | |
1877 | * | |
1878 | * Returns: | |
1879 | * -1 on failure | |
1880 | * 0 otherwise | |
1881 | */ | |
1882 | static int vrrp_autoconfig_if_del(struct interface *ifp) | |
27fd8827 QY |
1883 | { |
1884 | if (!vrrp_autoconfig_is_on) | |
1885 | return 0; | |
1886 | ||
6e93585e QY |
1887 | struct vrrp_vrouter *vr; |
1888 | struct listnode *ln; | |
1889 | struct list *vrs; | |
27fd8827 | 1890 | |
6e93585e | 1891 | vrs = vrrp_lookup_by_if_any(ifp); |
27fd8827 | 1892 | |
6e93585e QY |
1893 | for (ALL_LIST_ELEMENTS_RO(vrs, ln, vr)) |
1894 | if (vr->autoconf | |
1895 | && (!vr->ifp || (!vr->v4->mvl_ifp && !vr->v6->mvl_ifp))) { | |
b637bcd4 QY |
1896 | DEBUGD(&vrrp_dbg_auto, |
1897 | VRRP_LOGPFX VRRP_LOGPFX_VRID | |
6e93585e QY |
1898 | "All VRRP interfaces for instance deleted; destroying autoconfigured VRRP router", |
1899 | vr->vrid); | |
1900 | vrrp_vrouter_destroy(vr); | |
b637bcd4 | 1901 | } |
27fd8827 | 1902 | |
6e93585e | 1903 | list_delete(&vrs); |
27fd8827 QY |
1904 | |
1905 | return 0; | |
1906 | } | |
1907 | ||
6e93585e QY |
1908 | /* |
1909 | * Callback to notify autoconfig of interface up. | |
1910 | * | |
8bceffc7 QY |
1911 | * Creates VRRP instance on interface if it does not exist. Otherwise does |
1912 | * nothing. | |
6e93585e QY |
1913 | * |
1914 | * ifp | |
1915 | * Interface to operate on | |
1916 | * | |
1917 | * Returns: | |
1918 | * -1 on failure | |
1919 | * 0 otherwise | |
1920 | */ | |
1921 | static int vrrp_autoconfig_if_up(struct interface *ifp) | |
53e60e5c | 1922 | { |
27fd8827 QY |
1923 | if (!vrrp_autoconfig_is_on) |
1924 | return 0; | |
1925 | ||
6e93585e | 1926 | struct vrrp_vrouter *vr = vrrp_lookup_by_if_mvl(ifp); |
27fd8827 QY |
1927 | |
1928 | if (vr && !vr->autoconf) | |
1929 | return 0; | |
1930 | ||
1931 | if (!vr) { | |
1932 | vrrp_autoconfig_if_add(ifp); | |
53e60e5c QY |
1933 | return 0; |
1934 | } | |
1935 | ||
27fd8827 QY |
1936 | return 0; |
1937 | } | |
1938 | ||
6e93585e QY |
1939 | /* |
1940 | * Callback to notify autoconfig of interface down. | |
1941 | * | |
1942 | * Does nothing. An interface down event is accompanied by address deletion | |
1943 | * events for all the addresses on the interface; if an autoconfigured VRRP | |
1944 | * router exists on this interface, then it will have all its addresses deleted | |
1945 | * and end up in Initialize. | |
1946 | * | |
1947 | * ifp | |
1948 | * Interface to operate on | |
1949 | * | |
1950 | * Returns: | |
1951 | * -1 on failure | |
1952 | * 0 otherwise | |
1953 | */ | |
1954 | static int vrrp_autoconfig_if_down(struct interface *ifp) | |
27fd8827 QY |
1955 | { |
1956 | if (!vrrp_autoconfig_is_on) | |
1957 | return 0; | |
1958 | ||
1959 | return 0; | |
1960 | } | |
1961 | ||
6e93585e QY |
1962 | /* |
1963 | * Callback to notify autoconfig of a new interface address. | |
1964 | * | |
1965 | * If a VRRP router exists on this interface, its address list is updated to | |
1966 | * match the new address list. If no addresses remain, a Shutdown event is | |
1967 | * issued to the VRRP router. | |
1968 | * | |
1969 | * ifp | |
1970 | * Interface to operate on | |
1971 | * | |
1972 | * Returns: | |
1973 | * -1 on failure | |
1974 | * 0 otherwise | |
1975 | * | |
1976 | */ | |
1977 | static int vrrp_autoconfig_if_address_add(struct interface *ifp) | |
27fd8827 QY |
1978 | { |
1979 | if (!vrrp_autoconfig_is_on) | |
1980 | return 0; | |
1981 | ||
6e93585e | 1982 | struct vrrp_vrouter *vr = vrrp_lookup_by_if_mvl(ifp); |
27fd8827 | 1983 | |
ac1429b9 QY |
1984 | if (vr && vr->autoconf) { |
1985 | if (vr->v4->mvl_ifp == ifp) | |
1986 | vrrp_autoconfig_autoaddrupdate(vr->v4); | |
1987 | else if (vr->v6->mvl_ifp == ifp) | |
1988 | vrrp_autoconfig_autoaddrupdate(vr->v6); | |
1989 | } | |
27fd8827 QY |
1990 | |
1991 | return 0; | |
1992 | } | |
1993 | ||
6e93585e QY |
1994 | /* |
1995 | * Callback to notify autoconfig of a removed interface address. | |
1996 | * | |
1997 | * If a VRRP router exists on this interface, its address list is updated to | |
1998 | * match the new address list. If no addresses remain, a Shutdown event is | |
1999 | * issued to the VRRP router. | |
2000 | * | |
2001 | * ifp | |
2002 | * Interface to operate on | |
2003 | * | |
2004 | * Returns: | |
2005 | * -1 on failure | |
2006 | * 0 otherwise | |
2007 | * | |
2008 | */ | |
2009 | static int vrrp_autoconfig_if_address_del(struct interface *ifp) | |
27fd8827 QY |
2010 | { |
2011 | if (!vrrp_autoconfig_is_on) | |
2012 | return 0; | |
2013 | ||
6e93585e | 2014 | struct vrrp_vrouter *vr = vrrp_lookup_by_if_mvl(ifp); |
27fd8827 | 2015 | |
ac1429b9 QY |
2016 | if (vr && vr->autoconf) { |
2017 | if (vr->v4->mvl_ifp == ifp) | |
2018 | vrrp_autoconfig_autoaddrupdate(vr->v4); | |
2019 | else if (vr->v6->mvl_ifp == ifp) | |
2020 | vrrp_autoconfig_autoaddrupdate(vr->v6); | |
2021 | } | |
27fd8827 QY |
2022 | |
2023 | return 0; | |
2024 | } | |
2025 | ||
2026 | int vrrp_autoconfig(void) | |
2027 | { | |
2028 | if (!vrrp_autoconfig_is_on) | |
2029 | return 0; | |
2030 | ||
490810d5 | 2031 | struct vrf *vrf; |
27fd8827 | 2032 | struct interface *ifp; |
53e60e5c | 2033 | |
490810d5 QY |
2034 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
2035 | FOR_ALL_INTERFACES (vrf, ifp) | |
2036 | vrrp_autoconfig_if_add(ifp); | |
2037 | } | |
53e60e5c QY |
2038 | |
2039 | return 0; | |
2040 | } | |
2041 | ||
27fd8827 QY |
2042 | void vrrp_autoconfig_on(int version) |
2043 | { | |
2044 | vrrp_autoconfig_is_on = true; | |
2045 | vrrp_autoconfig_version = version; | |
2046 | ||
2047 | vrrp_autoconfig(); | |
2048 | } | |
2049 | ||
2050 | void vrrp_autoconfig_off(void) | |
2051 | { | |
2052 | vrrp_autoconfig_is_on = false; | |
2053 | ||
2054 | struct list *ll = hash_to_list(vrrp_vrouters_hash); | |
2055 | ||
2056 | struct listnode *ln; | |
2057 | struct vrrp_vrouter *vr; | |
2058 | ||
2059 | for (ALL_LIST_ELEMENTS_RO(ll, ln, vr)) | |
2060 | if (vr->autoconf) | |
2061 | vrrp_vrouter_destroy(vr); | |
2062 | ||
2063 | list_delete(&ll); | |
2064 | } | |
2065 | ||
6e93585e QY |
2066 | /* Interface tracking ------------------------------------------------------ */ |
2067 | ||
2068 | /* | |
2069 | * Bind any pending interfaces. | |
2070 | * | |
2071 | * mvl_ifp | |
2072 | * macvlan interface that some VRRP instances might want to bind to | |
2073 | */ | |
2074 | static void vrrp_bind_pending(struct interface *mvl_ifp) | |
2075 | { | |
2076 | struct vrrp_vrouter *vr; | |
2077 | ||
76bcde9e QY |
2078 | DEBUGD(&vrrp_dbg_zebra, |
2079 | VRRP_LOGPFX | |
2080 | "Searching for instances that could use interface %s", | |
2081 | mvl_ifp->name); | |
2082 | ||
6e93585e QY |
2083 | vr = vrrp_lookup_by_if_mvl(mvl_ifp); |
2084 | ||
2085 | if (vr) { | |
76bcde9e QY |
2086 | DEBUGD(&vrrp_dbg_zebra, |
2087 | VRRP_LOGPFX VRRP_LOGPFX_VRID | |
2088 | "<-- This instance can probably use interface %s", | |
2089 | vr->vrid, mvl_ifp->name); | |
2090 | ||
6e93585e QY |
2091 | if (mvl_ifp->hw_addr[4] == 0x01 && !vr->v4->mvl_ifp) |
2092 | vrrp_attach_interface(vr->v4); | |
2093 | else if (mvl_ifp->hw_addr[4] == 0x02 && !vr->v6->mvl_ifp) | |
2094 | vrrp_attach_interface(vr->v6); | |
2095 | } | |
2096 | } | |
2097 | ||
2098 | void vrrp_if_up(struct interface *ifp) | |
2099 | { | |
2100 | struct vrrp_vrouter *vr; | |
2101 | struct listnode *ln; | |
2102 | struct list *vrs; | |
2103 | ||
2104 | vrrp_bind_pending(ifp); | |
2105 | ||
2106 | vrs = vrrp_lookup_by_if_any(ifp); | |
2107 | ||
d60b2ffd | 2108 | for (ALL_LIST_ELEMENTS_RO(vrs, ln, vr)) { |
6e93585e QY |
2109 | vrrp_check_start(vr); |
2110 | ||
ee5aabb6 QY |
2111 | if (!if_is_operative(ifp)) |
2112 | continue; | |
2113 | ||
d60b2ffd QY |
2114 | /* |
2115 | * Handle the situation in which we performed a state | |
2116 | * transition on this VRRP router but needed to wait for the | |
2117 | * macvlan interface to come up to perform some actions | |
2118 | */ | |
2119 | if (ifp == vr->v4->mvl_ifp) { | |
2120 | if (vr->v4->advert_pending) { | |
2121 | DEBUGD(&vrrp_dbg_proto, | |
2122 | VRRP_LOGPFX VRRP_LOGPFX_VRID | |
613b45b0 | 2123 | VRRP_LOGPFX_FAM |
d60b2ffd | 2124 | "Interface up; sending pending advertisement", |
613b45b0 | 2125 | vr->vrid, family2str(vr->v4->family)); |
d60b2ffd QY |
2126 | vrrp_send_advertisement(vr->v4); |
2127 | vr->v4->advert_pending = false; | |
2128 | } | |
2129 | if (vr->v4->garp_pending) { | |
2130 | DEBUGD(&vrrp_dbg_proto, | |
2131 | VRRP_LOGPFX VRRP_LOGPFX_VRID | |
613b45b0 | 2132 | VRRP_LOGPFX_FAM |
d60b2ffd | 2133 | "Interface up; sending pending gratuitous ARP", |
613b45b0 | 2134 | vr->vrid, family2str(vr->v4->family)); |
d60b2ffd QY |
2135 | vrrp_garp_send_all(vr->v4); |
2136 | vr->v4->garp_pending = false; | |
2137 | } | |
2138 | } | |
2139 | if (ifp == vr->v6->mvl_ifp) { | |
2140 | if (vr->v6->advert_pending) { | |
2141 | DEBUGD(&vrrp_dbg_proto, | |
2142 | VRRP_LOGPFX VRRP_LOGPFX_VRID | |
613b45b0 | 2143 | VRRP_LOGPFX_FAM |
d60b2ffd | 2144 | "Interface up; sending pending advertisement", |
613b45b0 | 2145 | vr->vrid, family2str(vr->v6->family)); |
d60b2ffd QY |
2146 | vrrp_send_advertisement(vr->v6); |
2147 | vr->v6->advert_pending = false; | |
2148 | } | |
2149 | if (vr->v6->ndisc_pending) { | |
2150 | DEBUGD(&vrrp_dbg_proto, | |
2151 | VRRP_LOGPFX VRRP_LOGPFX_VRID | |
613b45b0 | 2152 | VRRP_LOGPFX_FAM |
d60b2ffd | 2153 | "Interface up; sending pending Unsolicited Neighbor Advertisement", |
613b45b0 | 2154 | vr->vrid, family2str(vr->v6->family)); |
d60b2ffd QY |
2155 | vrrp_ndisc_una_send_all(vr->v6); |
2156 | vr->v6->ndisc_pending = false; | |
2157 | } | |
2158 | } | |
2159 | } | |
2160 | ||
6e93585e QY |
2161 | list_delete(&vrs); |
2162 | ||
2163 | vrrp_autoconfig_if_up(ifp); | |
2164 | } | |
2165 | ||
2166 | void vrrp_if_down(struct interface *ifp) | |
2167 | { | |
2168 | struct vrrp_vrouter *vr; | |
2169 | struct listnode *ln; | |
2170 | struct list *vrs; | |
2171 | ||
2e3d7564 QY |
2172 | vrrp_bind_pending(ifp); |
2173 | ||
6e93585e QY |
2174 | vrs = vrrp_lookup_by_if_any(ifp); |
2175 | ||
2176 | for (ALL_LIST_ELEMENTS_RO(vrs, ln, vr)) { | |
2e3d7564 QY |
2177 | vrrp_check_start(vr); |
2178 | ||
c4485ad5 QY |
2179 | if (vr->ifp == ifp || vr->v4->mvl_ifp == ifp |
2180 | || vr->v6->mvl_ifp == ifp) { | |
2181 | DEBUGD(&vrrp_dbg_auto, | |
2182 | VRRP_LOGPFX VRRP_LOGPFX_VRID "Interface %s down", | |
2183 | vr->vrid, ifp->name); | |
6e93585e QY |
2184 | } |
2185 | } | |
2186 | ||
2187 | list_delete(&vrs); | |
2188 | ||
2189 | vrrp_autoconfig_if_down(ifp); | |
2190 | } | |
2191 | ||
2192 | void vrrp_if_add(struct interface *ifp) | |
2193 | { | |
2194 | vrrp_bind_pending(ifp); | |
2195 | ||
2196 | /* thanks, zebra */ | |
2197 | if (CHECK_FLAG(ifp->flags, IFF_UP)) | |
2198 | vrrp_if_up(ifp); | |
2199 | ||
2200 | vrrp_autoconfig_if_add(ifp); | |
2201 | } | |
2202 | ||
2203 | void vrrp_if_del(struct interface *ifp) | |
2204 | { | |
2205 | struct listnode *ln; | |
2206 | struct vrrp_vrouter *vr; | |
6e93585e QY |
2207 | |
2208 | vrrp_if_down(ifp); | |
2209 | ||
2681134b QY |
2210 | /* |
2211 | * You think we'd be able use vrrp_lookup_by_if_any to find interfaces? | |
2212 | * Nah. FRR's interface management is insane. There are no ordering | |
2213 | * guarantees about what interfaces are deleted when. Maybe this is a | |
2214 | * macvlan and its parent was already deleted, in which case its | |
2215 | * ifindex is now IFINDEX_INTERNAL, so ifp->link_ifindex - while still | |
2216 | * valid - doesn't match any interface on the system, meaning we can't | |
2217 | * use any of the vrrp_lookup* functions since they rely on finding the | |
2218 | * base interface of what they're given by following link_ifindex. | |
2219 | * | |
2220 | * Since we need to actually NULL out pointers in this function to | |
2221 | * avoid a UAF - since the caller will (might) free ifp after we return | |
2222 | * - we need to look up based on pointers. | |
2223 | */ | |
2224 | struct list *vrs = hash_to_list(vrrp_vrouters_hash); | |
2225 | ||
6e93585e | 2226 | for (ALL_LIST_ELEMENTS_RO(vrs, ln, vr)) { |
2681134b QY |
2227 | if (ifp == vr->ifp) { |
2228 | vrrp_event(vr->v4, VRRP_EVENT_SHUTDOWN); | |
2229 | vrrp_event(vr->v6, VRRP_EVENT_SHUTDOWN); | |
61980c71 | 2230 | /* |
2681134b QY |
2231 | * Stands to reason if the base was deleted, so were |
2232 | * (or will be) its children | |
61980c71 | 2233 | */ |
2681134b QY |
2234 | vr->v4->mvl_ifp = NULL; |
2235 | vr->v6->mvl_ifp = NULL; | |
61980c71 | 2236 | /* |
2681134b QY |
2237 | * We shouldn't need to lose the reference if it's the |
2238 | * primary interface, because that was configured | |
2239 | * explicitly in our config, and thus will be kept as a | |
2240 | * stub; to avoid stupid bugs, double check that | |
61980c71 | 2241 | */ |
2681134b QY |
2242 | assert(ifp->configured); |
2243 | } else if (ifp == vr->v4->mvl_ifp) { | |
2244 | vrrp_event(vr->v4, VRRP_EVENT_SHUTDOWN); | |
61980c71 | 2245 | /* |
2681134b QY |
2246 | * If this is a macvlan, then it wasn't explicitly |
2247 | * configured and will be deleted when we return from | |
2248 | * this function, so we need to lose the reference | |
61980c71 | 2249 | */ |
2681134b QY |
2250 | vr->v4->mvl_ifp = NULL; |
2251 | } else if (ifp == vr->v6->mvl_ifp) { | |
2252 | vrrp_event(vr->v6, VRRP_EVENT_SHUTDOWN); | |
61980c71 | 2253 | /* |
2681134b | 2254 | * If this is a macvlan, then it wasn't explicitly |
61980c71 QY |
2255 | * configured and will be deleted when we return from |
2256 | * this function, so we need to lose the reference | |
2257 | */ | |
2681134b | 2258 | vr->v6->mvl_ifp = NULL; |
62475ecd | 2259 | } |
6e93585e QY |
2260 | } |
2261 | ||
2262 | list_delete(&vrs); | |
2263 | ||
2264 | vrrp_autoconfig_if_del(ifp); | |
2265 | } | |
2266 | ||
2267 | void vrrp_if_address_add(struct interface *ifp) | |
2268 | { | |
2269 | struct vrrp_vrouter *vr; | |
2270 | struct listnode *ln; | |
2271 | struct list *vrs; | |
2272 | ||
2273 | /* | |
2274 | * We have to do a wide search here, because we need to know when a v6 | |
2275 | * macvlan device gets a new address. This is because the macvlan link | |
2276 | * local is used as the source address for v6 advertisements, and hence | |
2277 | * "do I have a link local" constitutes an activation condition for v6 | |
2278 | * virtual routers. | |
2279 | */ | |
2280 | vrs = vrrp_lookup_by_if_any(ifp); | |
2281 | ||
2282 | for (ALL_LIST_ELEMENTS_RO(vrs, ln, vr)) | |
2283 | vrrp_check_start(vr); | |
2284 | ||
2285 | list_delete(&vrs); | |
2286 | ||
2287 | vrrp_autoconfig_if_address_add(ifp); | |
2288 | } | |
2289 | ||
2290 | void vrrp_if_address_del(struct interface *ifp) | |
2291 | { | |
89f34204 QY |
2292 | /* |
2293 | * Zebra is stupid and sends us address deletion notifications | |
2294 | * when any of the following condition sets are met: | |
2295 | * | |
b0ec34c8 QY |
2296 | * - if_is_operative && address deleted |
2297 | * - if_is_operative -> !if_is_operative | |
89f34204 QY |
2298 | * |
2299 | * Note that the second one is nonsense, because Zebra behaves as | |
2300 | * though an interface going down means all the addresses on that | |
2301 | * interface got deleted. Which is a problem for autoconfig because all | |
2302 | * the addresses on an interface going away means the VRRP session goes | |
2303 | * to Initialize. However interfaces go down whenever we transition to | |
2304 | * Backup, so this effectively means that for autoconfigured instances | |
2305 | * we actually end up in Initialize whenever we try to go into Backup. | |
2306 | * | |
2307 | * Also, Zebra does NOT send us notifications when: | |
b0ec34c8 | 2308 | * - !if_is_operative && address deleted |
89f34204 QY |
2309 | * |
2310 | * Which means if we're in backup and an address is deleted out from | |
2311 | * under us, we won't even know. | |
2312 | * | |
2313 | * The only solution here is to only resynchronize our address list | |
2314 | * when: | |
2315 | * | |
2316 | * - An interfaces comes up | |
2317 | * - An interface address is added | |
2318 | * - An interface address is deleted AND the interface is up | |
2319 | * | |
2320 | * Even though this is only a problem with autoconfig at the moment I'm | |
2321 | * papering over Zebra's braindead semantics here. Every piece of code | |
2322 | * in this function should be protected by a check that the interface | |
2323 | * is up. | |
2324 | */ | |
2fff50ec | 2325 | if (if_is_operative(ifp)) |
89f34204 | 2326 | vrrp_autoconfig_if_address_del(ifp); |
6e93585e QY |
2327 | } |
2328 | ||
27fd8827 QY |
2329 | /* Other ------------------------------------------------------------------- */ |
2330 | ||
f828842a QY |
2331 | int vrrp_config_write_global(struct vty *vty) |
2332 | { | |
8cd1d277 QY |
2333 | unsigned int writes = 0; |
2334 | ||
2335 | if (vrrp_autoconfig_is_on && ++writes) | |
f828842a QY |
2336 | vty_out(vty, "vrrp autoconfigure%s\n", |
2337 | vrrp_autoconfig_version == 2 ? " version 2" : ""); | |
2338 | ||
f495425b | 2339 | /* FIXME: needs to be udpated for full YANG conversion. */ |
8cd1d277 | 2340 | if (vd.priority != VRRP_DEFAULT_PRIORITY && ++writes) |
6cde4b45 | 2341 | vty_out(vty, "vrrp default priority %hhu\n", vd.priority); |
8cd1d277 QY |
2342 | |
2343 | if (vd.advertisement_interval != VRRP_DEFAULT_ADVINT && ++writes) | |
2344 | vty_out(vty, | |
0b1321e2 | 2345 | "vrrp default advertisement-interval %u\n", |
33b010a9 | 2346 | vd.advertisement_interval * CS2MS); |
8cd1d277 QY |
2347 | |
2348 | if (vd.preempt_mode != VRRP_DEFAULT_PREEMPT && ++writes) | |
2349 | vty_out(vty, "%svrrp default preempt\n", | |
2350 | !vd.preempt_mode ? "no " : ""); | |
2351 | ||
2352 | if (vd.accept_mode != VRRP_DEFAULT_ACCEPT && ++writes) | |
2353 | vty_out(vty, "%svrrp default accept\n", | |
2354 | !vd.accept_mode ? "no " : ""); | |
2355 | ||
2356 | if (vd.shutdown != VRRP_DEFAULT_SHUTDOWN && ++writes) | |
2357 | vty_out(vty, "%svrrp default shutdown\n", | |
2358 | !vd.shutdown ? "no " : ""); | |
2359 | ||
2360 | return writes; | |
f828842a QY |
2361 | } |
2362 | ||
53ca01e5 | 2363 | static unsigned int vrrp_hash_key(const void *arg) |
5435a2bf | 2364 | { |
53ca01e5 | 2365 | const struct vrrp_vrouter *vr = arg; |
4f0b6b45 | 2366 | char key[IFNAMSIZ + 64]; |
2fff50ec | 2367 | |
0b1321e2 | 2368 | snprintf(key, sizeof(key), "%s@%u", vr->ifp->name, vr->vrid); |
4f0b6b45 QY |
2369 | |
2370 | return string_hash_make(key); | |
5435a2bf QY |
2371 | } |
2372 | ||
2373 | static bool vrrp_hash_cmp(const void *arg1, const void *arg2) | |
2374 | { | |
2375 | const struct vrrp_vrouter *vr1 = arg1; | |
2376 | const struct vrrp_vrouter *vr2 = arg2; | |
2377 | ||
4f0b6b45 | 2378 | if (vr1->ifp != vr2->ifp) |
f06c4576 | 2379 | return false; |
4f0b6b45 | 2380 | if (vr1->vrid != vr2->vrid) |
f06c4576 | 2381 | return false; |
4f0b6b45 | 2382 | |
f06c4576 | 2383 | return true; |
5435a2bf QY |
2384 | } |
2385 | ||
2386 | void vrrp_init(void) | |
2387 | { | |
8cd1d277 | 2388 | /* Set default defaults */ |
f495425b QY |
2389 | vd.version = yang_get_default_uint8("%s/version", VRRP_XPATH_FULL); |
2390 | vd.priority = yang_get_default_uint8("%s/priority", VRRP_XPATH_FULL); | |
2391 | vd.advertisement_interval = yang_get_default_uint16( | |
2392 | "%s/advertisement-interval", VRRP_XPATH_FULL); | |
2393 | vd.preempt_mode = yang_get_default_bool("%s/preempt", VRRP_XPATH_FULL); | |
2394 | vd.accept_mode = | |
2395 | yang_get_default_bool("%s/accept-mode", VRRP_XPATH_FULL); | |
8cd1d277 QY |
2396 | vd.shutdown = VRRP_DEFAULT_SHUTDOWN; |
2397 | ||
53e60e5c | 2398 | vrrp_autoconfig_version = 3; |
5435a2bf QY |
2399 | vrrp_vrouters_hash = hash_create(&vrrp_hash_key, vrrp_hash_cmp, |
2400 | "VRRP virtual router hash"); | |
2401 | vrf_init(NULL, NULL, NULL, NULL, NULL); | |
2402 | } | |
f1175ba9 QY |
2403 | |
2404 | void vrrp_fini(void) | |
2405 | { | |
2406 | /* Destroy all instances */ | |
2407 | struct list *vrs = hash_to_list(vrrp_vrouters_hash); | |
2408 | ||
2409 | struct listnode *ln; | |
2410 | struct vrrp_vrouter *vr; | |
2411 | ||
19c38250 | 2412 | for (ALL_LIST_ELEMENTS_RO(vrs, ln, vr)) |
f1175ba9 | 2413 | vrrp_vrouter_destroy(vr); |
f1175ba9 QY |
2414 | |
2415 | list_delete(&vrs); | |
2416 | ||
2417 | hash_clean(vrrp_vrouters_hash, NULL); | |
2418 | hash_free(vrrp_vrouters_hash); | |
2419 | } |