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718e3744 | 1 | /* Routing Information Base. |
2 | * Copyright (C) 1997, 98, 99, 2001 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra 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 | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
19 | * 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | #include <zebra.h> | |
23 | ||
24 | #include "prefix.h" | |
25 | #include "table.h" | |
26 | #include "memory.h" | |
27 | #include "str.h" | |
28 | #include "command.h" | |
29 | #include "if.h" | |
30 | #include "log.h" | |
31 | #include "sockunion.h" | |
4d38fdb4 | 32 | #include "linklist.h" |
33 | #include "thread.h" | |
34 | #include "workqueue.h" | |
7514fb77 PJ |
35 | #include "prefix.h" |
36 | #include "routemap.h" | |
fb018d25 | 37 | #include "nexthop.h" |
b72ede27 | 38 | #include "vrf.h" |
718e3744 | 39 | |
40 | #include "zebra/rib.h" | |
41 | #include "zebra/rt.h" | |
42 | #include "zebra/zserv.h" | |
43 | #include "zebra/redistribute.h" | |
44 | #include "zebra/debug.h" | |
5adc2528 | 45 | #include "zebra/zebra_fpm.h" |
fb018d25 | 46 | #include "zebra/zebra_rnh.h" |
88177fe3 | 47 | #include "zebra/interface.h" |
718e3744 | 48 | |
49 | /* Default rtm_table for all clients */ | |
b21b19c5 | 50 | extern struct zebra_t zebrad; |
718e3744 | 51 | |
6baf7bb8 DS |
52 | /* Should we allow non Quagga processes to delete our routes */ |
53 | extern int allow_delete; | |
54 | ||
457eb9af PJ |
55 | /* Hold time for RIB process, should be very minimal. |
56 | * it is useful to able to set it otherwise for testing, hence exported | |
57 | * as global here for test-rig code. | |
58 | */ | |
59 | int rib_process_hold_time = 10; | |
60 | ||
718e3744 | 61 | /* Each route type's string and default distance value. */ |
d145bc00 | 62 | static const struct |
718e3744 | 63 | { |
64 | int key; | |
65 | int distance; | |
5734509c | 66 | } route_info[ZEBRA_ROUTE_MAX] = |
718e3744 | 67 | { |
5734509c PJ |
68 | [ZEBRA_ROUTE_SYSTEM] = {ZEBRA_ROUTE_SYSTEM, 0}, |
69 | [ZEBRA_ROUTE_KERNEL] = {ZEBRA_ROUTE_KERNEL, 0}, | |
70 | [ZEBRA_ROUTE_CONNECT] = {ZEBRA_ROUTE_CONNECT, 0}, | |
71 | [ZEBRA_ROUTE_STATIC] = {ZEBRA_ROUTE_STATIC, 1}, | |
72 | [ZEBRA_ROUTE_RIP] = {ZEBRA_ROUTE_RIP, 120}, | |
73 | [ZEBRA_ROUTE_RIPNG] = {ZEBRA_ROUTE_RIPNG, 120}, | |
74 | [ZEBRA_ROUTE_OSPF] = {ZEBRA_ROUTE_OSPF, 110}, | |
75 | [ZEBRA_ROUTE_OSPF6] = {ZEBRA_ROUTE_OSPF6, 110}, | |
76 | [ZEBRA_ROUTE_ISIS] = {ZEBRA_ROUTE_ISIS, 115}, | |
77 | [ZEBRA_ROUTE_BGP] = {ZEBRA_ROUTE_BGP, 20 /* IBGP is 200. */}, | |
78 | [ZEBRA_ROUTE_BABEL] = {ZEBRA_ROUTE_BABEL, 95}, | |
7052f228 | 79 | /* no entry/default: 150 */ |
718e3744 | 80 | }; |
6b0655a2 | 81 | |
718e3744 | 82 | /* Vector for routing table. */ |
b72ede27 | 83 | static vector zebra_vrf_vector; |
718e3744 | 84 | |
1b5ed1b0 | 85 | /* |
b72ede27 | 86 | * nexthop_type_to_str |
1b5ed1b0 | 87 | */ |
b72ede27 FL |
88 | const char * |
89 | nexthop_type_to_str (enum nexthop_types_t nh_type) | |
718e3744 | 90 | { |
b72ede27 FL |
91 | static const char *desc[] = { |
92 | "none", | |
93 | "Directly connected", | |
94 | "Interface route", | |
95 | "IPv4 nexthop", | |
96 | "IPv4 nexthop with ifindex", | |
97 | "IPv4 nexthop with ifname", | |
98 | "IPv6 nexthop", | |
99 | "IPv6 nexthop with ifindex", | |
100 | "IPv6 nexthop with ifname", | |
101 | "Null0 nexthop", | |
102 | }; | |
7a4bb9c5 | 103 | |
b72ede27 FL |
104 | if (nh_type >= ZEBRA_NUM_OF (desc)) |
105 | return "<Invalid nh type>"; | |
7a4bb9c5 | 106 | |
b72ede27 | 107 | return desc[nh_type]; |
7a4bb9c5 DS |
108 | } |
109 | ||
110 | int | |
111 | is_zebra_valid_kernel_table(u_int32_t table_id) | |
112 | { | |
113 | if ((table_id > ZEBRA_KERNEL_TABLE_MAX) || | |
114 | (table_id == RT_TABLE_UNSPEC) || | |
115 | (table_id == RT_TABLE_LOCAL) || | |
116 | (table_id == RT_TABLE_COMPAT)) | |
117 | return 0; | |
118 | else | |
119 | return 1; | |
120 | } | |
121 | ||
122 | int | |
123 | is_zebra_main_routing_table(u_int32_t table_id) | |
124 | { | |
125 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) | |
126 | return 1; | |
127 | return 0; | |
128 | } | |
129 | ||
0aabccc0 DD |
130 | int |
131 | zebra_check_addr (struct prefix *p) | |
132 | { | |
133 | if (p->family == AF_INET) | |
134 | { | |
135 | u_int32_t addr; | |
136 | ||
137 | addr = p->u.prefix4.s_addr; | |
138 | addr = ntohl (addr); | |
139 | ||
140 | if (IPV4_NET127 (addr) | |
141 | || IN_CLASSD (addr) | |
142 | || IPV4_LINKLOCAL(addr)) | |
143 | return 0; | |
144 | } | |
145 | #ifdef HAVE_IPV6 | |
146 | if (p->family == AF_INET6) | |
147 | { | |
148 | if (IN6_IS_ADDR_LOOPBACK (&p->u.prefix6)) | |
149 | return 0; | |
150 | if (IN6_IS_ADDR_LINKLOCAL(&p->u.prefix6)) | |
151 | return 0; | |
152 | } | |
153 | #endif /* HAVE_IPV6 */ | |
154 | return 1; | |
155 | } | |
156 | ||
fa713d9e | 157 | /* Add nexthop to the end of a nexthop list. */ |
4e3afb14 | 158 | static void |
fa713d9e | 159 | _nexthop_add (struct nexthop **target, struct nexthop *nexthop) |
718e3744 | 160 | { |
161 | struct nexthop *last; | |
162 | ||
fa713d9e | 163 | for (last = *target; last && last->next; last = last->next) |
718e3744 | 164 | ; |
165 | if (last) | |
166 | last->next = nexthop; | |
167 | else | |
fa713d9e | 168 | *target = nexthop; |
718e3744 | 169 | nexthop->prev = last; |
fa713d9e | 170 | } |
718e3744 | 171 | |
fa713d9e | 172 | /* Add nexthop to the end of a rib node's nexthop list */ |
fb018d25 | 173 | void |
fa713d9e CF |
174 | nexthop_add (struct rib *rib, struct nexthop *nexthop) |
175 | { | |
176 | _nexthop_add(&rib->nexthop, nexthop); | |
718e3744 | 177 | rib->nexthop_num++; |
178 | } | |
179 | ||
6e26278c DS |
180 | static void |
181 | _copy_nexthops (struct nexthop **tnh, struct nexthop *nh) | |
182 | { | |
183 | struct nexthop *nexthop; | |
184 | struct nexthop *nh1; | |
185 | ||
186 | for (nh1 = nh; nh1; nh1 = nh1->next) | |
187 | { | |
188 | nexthop = nexthop_new(); | |
189 | nexthop->flags = nh->flags; | |
190 | nexthop->type = nh->type; | |
191 | nexthop->ifindex = nh->ifindex; | |
192 | if (nh->ifname) | |
193 | nexthop->ifname = XSTRDUP(0, nh->ifname); | |
194 | memcpy(&(nexthop->gate), &(nh->gate), sizeof(union g_addr)); | |
195 | memcpy(&(nexthop->src), &(nh->src), sizeof(union g_addr)); | |
196 | _nexthop_add(tnh, nexthop); | |
197 | ||
198 | if (CHECK_FLAG(nh1->flags, NEXTHOP_FLAG_RECURSIVE)) | |
199 | _copy_nexthops(&nexthop->resolved, nh1->resolved); | |
200 | } | |
201 | } | |
202 | ||
203 | /** | |
204 | * copy_nexthop - copy a nexthop to the rib structure. | |
205 | */ | |
206 | void | |
207 | copy_nexthops (struct rib *rib, struct nexthop *nh) | |
208 | { | |
209 | struct nexthop *nexthop; | |
210 | ||
211 | nexthop = nexthop_new(); | |
212 | nexthop->flags = nh->flags; | |
213 | nexthop->type = nh->type; | |
214 | nexthop->ifindex = nh->ifindex; | |
215 | if (nh->ifname) | |
216 | nexthop->ifname = XSTRDUP(0, nh->ifname); | |
217 | memcpy(&(nexthop->gate), &(nh->gate), sizeof(union g_addr)); | |
218 | memcpy(&(nexthop->src), &(nh->src), sizeof(union g_addr)); | |
219 | nexthop_add(rib, nexthop); | |
220 | if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_RECURSIVE)) | |
221 | _copy_nexthops(&nexthop->resolved, nh->resolved); | |
222 | } | |
223 | ||
718e3744 | 224 | /* Delete specified nexthop from the list. */ |
a1ac18c4 | 225 | static void |
718e3744 | 226 | nexthop_delete (struct rib *rib, struct nexthop *nexthop) |
227 | { | |
228 | if (nexthop->next) | |
229 | nexthop->next->prev = nexthop->prev; | |
230 | if (nexthop->prev) | |
231 | nexthop->prev->next = nexthop->next; | |
232 | else | |
233 | rib->nexthop = nexthop->next; | |
234 | rib->nexthop_num--; | |
235 | } | |
236 | ||
237 | /* Free nexthop. */ | |
fb018d25 | 238 | void |
6e26278c | 239 | nexthop_free (struct nexthop *nexthop, struct route_node *rn) |
718e3744 | 240 | { |
a4b70768 | 241 | if (nexthop->ifname) |
242 | XFREE (0, nexthop->ifname); | |
fa713d9e | 243 | if (nexthop->resolved) |
6e26278c | 244 | nexthops_free(nexthop->resolved, rn); |
718e3744 | 245 | XFREE (MTYPE_NEXTHOP, nexthop); |
246 | } | |
247 | ||
fa713d9e | 248 | /* Frees a list of nexthops */ |
fb018d25 | 249 | void |
6e26278c | 250 | nexthops_free (struct nexthop *nexthop, struct route_node *rn) |
fa713d9e CF |
251 | { |
252 | struct nexthop *nh, *next; | |
6e26278c | 253 | struct prefix nh_p; |
fa713d9e CF |
254 | |
255 | for (nh = nexthop; nh; nh = next) | |
256 | { | |
257 | next = nh->next; | |
6e26278c DS |
258 | if (nh->type == NEXTHOP_TYPE_IPV4) |
259 | { | |
260 | nh_p.family = AF_INET; | |
261 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
262 | nh_p.u.prefix4 = nh->gate.ipv4; | |
70c0f184 | 263 | zebra_deregister_rnh_static_nh(&nh_p, rn); |
6e26278c DS |
264 | } |
265 | else if (nh->type == NEXTHOP_TYPE_IPV6) | |
266 | { | |
267 | nh_p.family = AF_INET6; | |
268 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
269 | nh_p.u.prefix6 = nh->gate.ipv6; | |
70c0f184 | 270 | zebra_deregister_rnh_static_nh(&nh_p, rn); |
6e26278c | 271 | } |
6e26278c | 272 | nexthop_free (nh, rn); |
fa713d9e CF |
273 | } |
274 | } | |
275 | ||
718e3744 | 276 | struct nexthop * |
277 | nexthop_ifindex_add (struct rib *rib, unsigned int ifindex) | |
278 | { | |
279 | struct nexthop *nexthop; | |
280 | ||
393deb9b | 281 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 282 | nexthop->type = NEXTHOP_TYPE_IFINDEX; |
283 | nexthop->ifindex = ifindex; | |
284 | ||
285 | nexthop_add (rib, nexthop); | |
286 | ||
287 | return nexthop; | |
288 | } | |
289 | ||
290 | struct nexthop * | |
291 | nexthop_ifname_add (struct rib *rib, char *ifname) | |
292 | { | |
293 | struct nexthop *nexthop; | |
294 | ||
393deb9b | 295 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 296 | nexthop->type = NEXTHOP_TYPE_IFNAME; |
a4b70768 | 297 | nexthop->ifname = XSTRDUP (0, ifname); |
718e3744 | 298 | |
299 | nexthop_add (rib, nexthop); | |
300 | ||
301 | return nexthop; | |
302 | } | |
303 | ||
304 | struct nexthop * | |
7514fb77 | 305 | nexthop_ipv4_add (struct rib *rib, struct in_addr *ipv4, struct in_addr *src) |
718e3744 | 306 | { |
307 | struct nexthop *nexthop; | |
308 | ||
393deb9b | 309 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 310 | nexthop->type = NEXTHOP_TYPE_IPV4; |
311 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
312 | if (src) |
313 | nexthop->src.ipv4 = *src; | |
718e3744 | 314 | |
315 | nexthop_add (rib, nexthop); | |
316 | ||
317 | return nexthop; | |
318 | } | |
319 | ||
26e2ae36 | 320 | struct nexthop * |
718e3744 | 321 | nexthop_ipv4_ifindex_add (struct rib *rib, struct in_addr *ipv4, |
7514fb77 | 322 | struct in_addr *src, unsigned int ifindex) |
718e3744 | 323 | { |
324 | struct nexthop *nexthop; | |
325 | ||
393deb9b | 326 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 327 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
328 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
329 | if (src) |
330 | nexthop->src.ipv4 = *src; | |
718e3744 | 331 | nexthop->ifindex = ifindex; |
332 | ||
333 | nexthop_add (rib, nexthop); | |
334 | ||
335 | return nexthop; | |
336 | } | |
337 | ||
c8a1cb5c DS |
338 | struct nexthop * |
339 | nexthop_ipv4_ifindex_ol_add (struct rib *rib, const struct in_addr *ipv4, | |
340 | const struct in_addr *src, const unsigned int ifindex) | |
341 | { | |
342 | struct nexthop *nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
343 | ||
344 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
345 | IPV4_ADDR_COPY (&nexthop->gate.ipv4, ipv4); | |
346 | if (src) | |
347 | IPV4_ADDR_COPY (&nexthop->src.ipv4, src); | |
348 | nexthop->ifindex = ifindex; | |
349 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK); | |
350 | nexthop_add (rib, nexthop); | |
351 | return nexthop; | |
352 | } | |
353 | ||
718e3744 | 354 | #ifdef HAVE_IPV6 |
355 | struct nexthop * | |
356 | nexthop_ipv6_add (struct rib *rib, struct in6_addr *ipv6) | |
357 | { | |
358 | struct nexthop *nexthop; | |
359 | ||
393deb9b | 360 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 361 | nexthop->type = NEXTHOP_TYPE_IPV6; |
362 | nexthop->gate.ipv6 = *ipv6; | |
363 | ||
364 | nexthop_add (rib, nexthop); | |
365 | ||
366 | return nexthop; | |
367 | } | |
368 | ||
41fc2714 | 369 | struct nexthop * |
718e3744 | 370 | nexthop_ipv6_ifname_add (struct rib *rib, struct in6_addr *ipv6, |
371 | char *ifname) | |
372 | { | |
373 | struct nexthop *nexthop; | |
374 | ||
393deb9b | 375 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 376 | nexthop->type = NEXTHOP_TYPE_IPV6_IFNAME; |
377 | nexthop->gate.ipv6 = *ipv6; | |
378 | nexthop->ifname = XSTRDUP (0, ifname); | |
379 | ||
380 | nexthop_add (rib, nexthop); | |
381 | ||
382 | return nexthop; | |
383 | } | |
384 | ||
41fc2714 | 385 | struct nexthop * |
718e3744 | 386 | nexthop_ipv6_ifindex_add (struct rib *rib, struct in6_addr *ipv6, |
387 | unsigned int ifindex) | |
388 | { | |
389 | struct nexthop *nexthop; | |
390 | ||
393deb9b | 391 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 392 | nexthop->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
393 | nexthop->gate.ipv6 = *ipv6; | |
394 | nexthop->ifindex = ifindex; | |
395 | ||
396 | nexthop_add (rib, nexthop); | |
397 | ||
398 | return nexthop; | |
399 | } | |
400 | #endif /* HAVE_IPV6 */ | |
401 | ||
595db7f1 | 402 | struct nexthop * |
403 | nexthop_blackhole_add (struct rib *rib) | |
404 | { | |
405 | struct nexthop *nexthop; | |
406 | ||
393deb9b | 407 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
595db7f1 | 408 | nexthop->type = NEXTHOP_TYPE_BLACKHOLE; |
409 | SET_FLAG (rib->flags, ZEBRA_FLAG_BLACKHOLE); | |
410 | ||
411 | nexthop_add (rib, nexthop); | |
412 | ||
413 | return nexthop; | |
414 | } | |
415 | ||
fa713d9e CF |
416 | /* This method checks whether a recursive nexthop has at |
417 | * least one resolved nexthop in the fib. | |
418 | */ | |
419 | int | |
420 | nexthop_has_fib_child(struct nexthop *nexthop) | |
421 | { | |
422 | struct nexthop *nh; | |
423 | ||
424 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
425 | return 0; | |
426 | ||
427 | for (nh = nexthop->resolved; nh; nh = nh->next) | |
428 | if (CHECK_FLAG (nh->flags, NEXTHOP_FLAG_FIB)) | |
429 | return 1; | |
430 | ||
431 | return 0; | |
432 | } | |
433 | ||
718e3744 | 434 | /* If force flag is not set, do not modify falgs at all for uninstall |
435 | the route from FIB. */ | |
a1ac18c4 | 436 | static int |
718e3744 | 437 | nexthop_active_ipv4 (struct rib *rib, struct nexthop *nexthop, int set, |
438 | struct route_node *top) | |
439 | { | |
440 | struct prefix_ipv4 p; | |
441 | struct route_table *table; | |
442 | struct route_node *rn; | |
443 | struct rib *match; | |
fa713d9e | 444 | int resolved; |
6e26278c | 445 | struct nexthop *newhop, *tnewhop; |
fa713d9e | 446 | struct nexthop *resolved_hop; |
6e26278c | 447 | int recursing = 0; |
c8a1cb5c | 448 | struct interface *ifp; |
718e3744 | 449 | |
450 | if (nexthop->type == NEXTHOP_TYPE_IPV4) | |
451 | nexthop->ifindex = 0; | |
452 | ||
453 | if (set) | |
fa713d9e CF |
454 | { |
455 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 456 | nexthops_free(nexthop->resolved, top); |
fa713d9e CF |
457 | nexthop->resolved = NULL; |
458 | } | |
718e3744 | 459 | |
6e26278c DS |
460 | /* Skip nexthops that have been filtered out due to route-map */ |
461 | /* The nexthops are specific to this route and so the same */ | |
462 | /* nexthop for a different route may not have this flag set */ | |
463 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
464 | return 0; | |
465 | ||
c8a1cb5c DS |
466 | /* onlink flag is an indication that we need to only check that |
467 | * the link is up, we won't find the GW address in the routing | |
468 | * table. | |
469 | */ | |
470 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
471 | { | |
472 | ifp = if_lookup_by_index (nexthop->ifindex); | |
473 | if (ifp && if_is_operative(ifp)) | |
474 | return 1; | |
475 | else | |
476 | return 0; | |
477 | } | |
478 | ||
718e3744 | 479 | /* Make lookup prefix. */ |
480 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
481 | p.family = AF_INET; | |
482 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
483 | p.prefix = nexthop->gate.ipv4; | |
484 | ||
485 | /* Lookup table. */ | |
b72ede27 | 486 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, VRF_DEFAULT); |
718e3744 | 487 | if (! table) |
488 | return 0; | |
489 | ||
490 | rn = route_node_match (table, (struct prefix *) &p); | |
491 | while (rn) | |
492 | { | |
493 | route_unlock_node (rn); | |
494 | ||
a50c107e | 495 | /* If lookup self prefix return immediately. */ |
718e3744 | 496 | if (rn == top) |
497 | return 0; | |
498 | ||
499 | /* Pick up selected route. */ | |
18ff3edd DS |
500 | /* However, do not resolve over default route unless explicitly allowed. */ |
501 | if (is_default_prefix (&rn->p) && | |
502 | !nh_resolve_via_default (p.family)) | |
503 | return 0; | |
504 | ||
9fd92e3c | 505 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
506 | { |
507 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
508 | continue; | |
509 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
510 | break; | |
511 | } | |
718e3744 | 512 | |
513 | /* If there is no selected route or matched route is EGP, go up | |
514 | tree. */ | |
6e26278c | 515 | if (! match) |
718e3744 | 516 | { |
517 | do { | |
518 | rn = rn->parent; | |
519 | } while (rn && rn->info == NULL); | |
520 | if (rn) | |
521 | route_lock_node (rn); | |
522 | } | |
523 | else | |
524 | { | |
48a53dc7 CF |
525 | /* If the longest prefix match for the nexthop yields |
526 | * a blackhole, mark it as inactive. */ | |
527 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
528 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
529 | return 0; | |
530 | ||
718e3744 | 531 | if (match->type == ZEBRA_ROUTE_CONNECT) |
532 | { | |
533 | /* Directly point connected route. */ | |
534 | newhop = match->nexthop; | |
535 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV4) | |
536 | nexthop->ifindex = newhop->ifindex; | |
537 | ||
538 | return 1; | |
539 | } | |
540 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
541 | { | |
fa713d9e | 542 | resolved = 0; |
718e3744 | 543 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
544 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
545 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
546 | { | |
547 | if (set) | |
548 | { | |
549 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 550 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
fa713d9e CF |
551 | |
552 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
553 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
c3e6b595 CF |
554 | /* If the resolving route specifies a gateway, use it */ |
555 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
556 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
557 | || newhop->type == NEXTHOP_TYPE_IPV4_IFNAME) | |
558 | { | |
559 | resolved_hop->type = newhop->type; | |
560 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
561 | ||
562 | if (newhop->ifindex) | |
563 | { | |
564 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
565 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
566 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
567 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
c3e6b595 CF |
568 | } |
569 | } | |
570 | ||
571 | /* If the resolving route is an interface route, | |
572 | * it means the gateway we are looking up is connected | |
573 | * to that interface. (The actual network is _not_ onlink). | |
574 | * Therefore, the resolved route should have the original | |
575 | * gateway as nexthop as it is directly connected. | |
576 | * | |
577 | * On Linux, we have to set the onlink netlink flag because | |
578 | * otherwise, the kernel won't accept the route. */ | |
718e3744 | 579 | if (newhop->type == NEXTHOP_TYPE_IFINDEX |
c3e6b595 CF |
580 | || newhop->type == NEXTHOP_TYPE_IFNAME) |
581 | { | |
582 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
583 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
584 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
585 | resolved_hop->ifindex = newhop->ifindex; | |
586 | } | |
fa713d9e | 587 | |
6e26278c DS |
588 | _nexthop_add(&nexthop->resolved, resolved_hop); |
589 | } | |
590 | resolved = 1; | |
591 | } | |
592 | return resolved; | |
593 | } | |
594 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
595 | { | |
596 | resolved = 0; | |
597 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
598 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
599 | { | |
600 | if (set) | |
601 | { | |
602 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
603 | ||
604 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
605 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
606 | /* If the resolving route specifies a gateway, use it */ | |
607 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
608 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
609 | || newhop->type == NEXTHOP_TYPE_IPV4_IFNAME) | |
610 | { | |
611 | resolved_hop->type = newhop->type; | |
612 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
613 | ||
614 | if (newhop->ifindex) | |
615 | { | |
616 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
617 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
618 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
619 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
6e26278c DS |
620 | } |
621 | } | |
622 | ||
623 | /* If the resolving route is an interface route, | |
624 | * it means the gateway we are looking up is connected | |
625 | * to that interface. (The actual network is _not_ onlink). | |
626 | * Therefore, the resolved route should have the original | |
627 | * gateway as nexthop as it is directly connected. | |
628 | * | |
629 | * On Linux, we have to set the onlink netlink flag because | |
630 | * otherwise, the kernel won't accept the route. | |
631 | */ | |
632 | if (newhop->type == NEXTHOP_TYPE_IFINDEX | |
633 | || newhop->type == NEXTHOP_TYPE_IFNAME) | |
634 | { | |
635 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
636 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
637 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
638 | resolved_hop->ifindex = newhop->ifindex; | |
639 | } | |
640 | ||
fa713d9e | 641 | _nexthop_add(&nexthop->resolved, resolved_hop); |
718e3744 | 642 | } |
fa713d9e | 643 | resolved = 1; |
718e3744 | 644 | } |
fa713d9e | 645 | return resolved; |
718e3744 | 646 | } |
647 | else | |
648 | { | |
649 | return 0; | |
650 | } | |
651 | } | |
652 | } | |
653 | return 0; | |
654 | } | |
655 | ||
656 | #ifdef HAVE_IPV6 | |
657 | /* If force flag is not set, do not modify falgs at all for uninstall | |
658 | the route from FIB. */ | |
a1ac18c4 | 659 | static int |
718e3744 | 660 | nexthop_active_ipv6 (struct rib *rib, struct nexthop *nexthop, int set, |
661 | struct route_node *top) | |
662 | { | |
663 | struct prefix_ipv6 p; | |
664 | struct route_table *table; | |
665 | struct route_node *rn; | |
666 | struct rib *match; | |
fa713d9e | 667 | int resolved; |
6e26278c DS |
668 | struct nexthop *newhop, *tnewhop; |
669 | int recursing = 0; | |
fa713d9e | 670 | struct nexthop *resolved_hop; |
718e3744 | 671 | |
672 | if (nexthop->type == NEXTHOP_TYPE_IPV6) | |
673 | nexthop->ifindex = 0; | |
674 | ||
675 | if (set) | |
fa713d9e CF |
676 | { |
677 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 678 | nexthops_free(nexthop->resolved, top); |
fa713d9e CF |
679 | nexthop->resolved = NULL; |
680 | } | |
718e3744 | 681 | |
6e26278c DS |
682 | /* Skip nexthops that have been filtered out due to route-map */ |
683 | /* The nexthops are specific to this route and so the same */ | |
684 | /* nexthop for a different route may not have this flag set */ | |
685 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
686 | return 0; | |
687 | ||
718e3744 | 688 | /* Make lookup prefix. */ |
689 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
690 | p.family = AF_INET6; | |
691 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
692 | p.prefix = nexthop->gate.ipv6; | |
693 | ||
694 | /* Lookup table. */ | |
b72ede27 | 695 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT); |
718e3744 | 696 | if (! table) |
697 | return 0; | |
698 | ||
699 | rn = route_node_match (table, (struct prefix *) &p); | |
700 | while (rn) | |
701 | { | |
702 | route_unlock_node (rn); | |
703 | ||
a50c107e | 704 | /* If lookup self prefix return immediately. */ |
718e3744 | 705 | if (rn == top) |
706 | return 0; | |
707 | ||
708 | /* Pick up selected route. */ | |
18ff3edd DS |
709 | /* However, do not resolve over default route unless explicitly allowed. */ |
710 | if (is_default_prefix (&rn->p) && | |
711 | !nh_resolve_via_default (p.family)) | |
712 | return 0; | |
713 | ||
9fd92e3c | 714 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
715 | { |
716 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
717 | continue; | |
718 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
719 | break; | |
720 | } | |
718e3744 | 721 | |
722 | /* If there is no selected route or matched route is EGP, go up | |
723 | tree. */ | |
6e26278c | 724 | if (! match) |
718e3744 | 725 | { |
726 | do { | |
727 | rn = rn->parent; | |
728 | } while (rn && rn->info == NULL); | |
729 | if (rn) | |
730 | route_lock_node (rn); | |
731 | } | |
732 | else | |
733 | { | |
48a53dc7 CF |
734 | /* If the longest prefix match for the nexthop yields |
735 | * a blackhole, mark it as inactive. */ | |
736 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
737 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
738 | return 0; | |
739 | ||
718e3744 | 740 | if (match->type == ZEBRA_ROUTE_CONNECT) |
741 | { | |
742 | /* Directly point connected route. */ | |
743 | newhop = match->nexthop; | |
744 | ||
745 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV6) | |
746 | nexthop->ifindex = newhop->ifindex; | |
747 | ||
748 | return 1; | |
749 | } | |
750 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
751 | { | |
fa713d9e | 752 | resolved = 0; |
718e3744 | 753 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
754 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
755 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
6e26278c DS |
756 | { |
757 | if (set) | |
758 | { | |
759 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
760 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
761 | ||
762 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
763 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
764 | /* See nexthop_active_ipv4 for a description how the | |
765 | * resolved nexthop is constructed. */ | |
766 | if (newhop->type == NEXTHOP_TYPE_IPV6 | |
767 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
768 | || newhop->type == NEXTHOP_TYPE_IPV6_IFNAME) | |
769 | { | |
770 | resolved_hop->type = newhop->type; | |
771 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
772 | ||
773 | if (newhop->ifindex) | |
774 | { | |
775 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
776 | resolved_hop->ifindex = newhop->ifindex; | |
777 | } | |
778 | } | |
779 | ||
780 | if (newhop->type == NEXTHOP_TYPE_IFINDEX | |
781 | || newhop->type == NEXTHOP_TYPE_IFNAME) | |
782 | { | |
783 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
784 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
785 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
786 | resolved_hop->ifindex = newhop->ifindex; | |
787 | } | |
788 | ||
789 | _nexthop_add(&nexthop->resolved, resolved_hop); | |
790 | } | |
791 | resolved = 1; | |
792 | } | |
793 | return resolved; | |
794 | } | |
795 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
796 | { | |
797 | resolved = 0; | |
798 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
799 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
718e3744 | 800 | { |
801 | if (set) | |
802 | { | |
803 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
fa713d9e CF |
804 | |
805 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
806 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
c3e6b595 CF |
807 | /* See nexthop_active_ipv4 for a description how the |
808 | * resolved nexthop is constructed. */ | |
718e3744 | 809 | if (newhop->type == NEXTHOP_TYPE_IPV6 |
810 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
811 | || newhop->type == NEXTHOP_TYPE_IPV6_IFNAME) | |
c3e6b595 CF |
812 | { |
813 | resolved_hop->type = newhop->type; | |
814 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
815 | ||
816 | if (newhop->ifindex) | |
817 | { | |
818 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
819 | resolved_hop->ifindex = newhop->ifindex; | |
820 | } | |
821 | } | |
fa713d9e | 822 | |
718e3744 | 823 | if (newhop->type == NEXTHOP_TYPE_IFINDEX |
c3e6b595 CF |
824 | || newhop->type == NEXTHOP_TYPE_IFNAME) |
825 | { | |
826 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
827 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
828 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
829 | resolved_hop->ifindex = newhop->ifindex; | |
830 | } | |
fa713d9e CF |
831 | |
832 | _nexthop_add(&nexthop->resolved, resolved_hop); | |
718e3744 | 833 | } |
fa713d9e | 834 | resolved = 1; |
718e3744 | 835 | } |
fa713d9e | 836 | return resolved; |
718e3744 | 837 | } |
838 | else | |
839 | { | |
840 | return 0; | |
841 | } | |
842 | } | |
843 | } | |
844 | return 0; | |
845 | } | |
846 | #endif /* HAVE_IPV6 */ | |
847 | ||
848 | struct rib * | |
849 | rib_match_ipv4 (struct in_addr addr) | |
850 | { | |
851 | struct prefix_ipv4 p; | |
852 | struct route_table *table; | |
853 | struct route_node *rn; | |
854 | struct rib *match; | |
fa713d9e CF |
855 | struct nexthop *newhop, *tnewhop; |
856 | int recursing; | |
718e3744 | 857 | |
858 | /* Lookup table. */ | |
b72ede27 | 859 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, VRF_DEFAULT); |
718e3744 | 860 | if (! table) |
861 | return 0; | |
862 | ||
863 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
864 | p.family = AF_INET; | |
865 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
866 | p.prefix = addr; | |
867 | ||
868 | rn = route_node_match (table, (struct prefix *) &p); | |
869 | ||
870 | while (rn) | |
871 | { | |
872 | route_unlock_node (rn); | |
873 | ||
874 | /* Pick up selected route. */ | |
9fd92e3c | 875 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
876 | { |
877 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
878 | continue; | |
879 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
880 | break; | |
881 | } | |
718e3744 | 882 | |
883 | /* If there is no selected route or matched route is EGP, go up | |
884 | tree. */ | |
6e26278c | 885 | if (! match) |
718e3744 | 886 | { |
887 | do { | |
888 | rn = rn->parent; | |
889 | } while (rn && rn->info == NULL); | |
890 | if (rn) | |
891 | route_lock_node (rn); | |
892 | } | |
893 | else | |
894 | { | |
895 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
896 | /* Directly point connected route. */ | |
897 | return match; | |
898 | else | |
899 | { | |
fa713d9e | 900 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) |
718e3744 | 901 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
902 | return match; | |
903 | return NULL; | |
904 | } | |
905 | } | |
906 | } | |
907 | return NULL; | |
908 | } | |
909 | ||
910 | struct rib * | |
911 | rib_lookup_ipv4 (struct prefix_ipv4 *p) | |
912 | { | |
913 | struct route_table *table; | |
914 | struct route_node *rn; | |
915 | struct rib *match; | |
fa713d9e CF |
916 | struct nexthop *nexthop, *tnexthop; |
917 | int recursing; | |
718e3744 | 918 | |
919 | /* Lookup table. */ | |
b72ede27 | 920 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, VRF_DEFAULT); |
718e3744 | 921 | if (! table) |
922 | return 0; | |
923 | ||
924 | rn = route_node_lookup (table, (struct prefix *) p); | |
925 | ||
926 | /* No route for this prefix. */ | |
927 | if (! rn) | |
928 | return NULL; | |
929 | ||
930 | /* Unlock node. */ | |
931 | route_unlock_node (rn); | |
932 | ||
9fd92e3c | 933 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
934 | { |
935 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
936 | continue; | |
937 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
938 | break; | |
939 | } | |
718e3744 | 940 | |
6e26278c | 941 | if (! match) |
718e3744 | 942 | return NULL; |
943 | ||
944 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
945 | return match; | |
946 | ||
fa713d9e | 947 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 948 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
949 | return match; | |
950 | ||
951 | return NULL; | |
952 | } | |
953 | ||
dc95824a DO |
954 | /* |
955 | * This clone function, unlike its original rib_lookup_ipv4(), checks | |
956 | * if specified IPv4 route record (prefix/mask -> gate) exists in | |
957 | * the whole RIB and has ZEBRA_FLAG_SELECTED set. | |
958 | * | |
959 | * Return values: | |
960 | * -1: error | |
961 | * 0: exact match found | |
962 | * 1: a match was found with a different gate | |
963 | * 2: connected route found | |
964 | * 3: no matches found | |
965 | */ | |
966 | int | |
967 | rib_lookup_ipv4_route (struct prefix_ipv4 *p, union sockunion * qgate) | |
968 | { | |
969 | struct route_table *table; | |
970 | struct route_node *rn; | |
971 | struct rib *match; | |
fa713d9e CF |
972 | struct nexthop *nexthop, *tnexthop; |
973 | int recursing; | |
974 | int nexthops_active; | |
dc95824a DO |
975 | |
976 | /* Lookup table. */ | |
b72ede27 | 977 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, VRF_DEFAULT); |
dc95824a DO |
978 | if (! table) |
979 | return ZEBRA_RIB_LOOKUP_ERROR; | |
980 | ||
981 | /* Scan the RIB table for exactly matching RIB entry. */ | |
982 | rn = route_node_lookup (table, (struct prefix *) p); | |
983 | ||
984 | /* No route for this prefix. */ | |
985 | if (! rn) | |
986 | return ZEBRA_RIB_NOTFOUND; | |
987 | ||
988 | /* Unlock node. */ | |
989 | route_unlock_node (rn); | |
990 | ||
991 | /* Find out if a "selected" RR for the discovered RIB entry exists ever. */ | |
9fd92e3c | 992 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
993 | { |
994 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
995 | continue; | |
996 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
997 | break; | |
998 | } | |
dc95824a DO |
999 | |
1000 | /* None such found :( */ | |
1001 | if (!match) | |
1002 | return ZEBRA_RIB_NOTFOUND; | |
1003 | ||
1004 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
1005 | return ZEBRA_RIB_FOUND_CONNECTED; | |
1006 | ||
1007 | /* Ok, we have a cood candidate, let's check it's nexthop list... */ | |
fa713d9e CF |
1008 | nexthops_active = 0; |
1009 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) | |
dc95824a | 1010 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
dc95824a | 1011 | { |
fa713d9e CF |
1012 | nexthops_active = 1; |
1013 | if (nexthop->gate.ipv4.s_addr == sockunion2ip (qgate)) | |
1014 | return ZEBRA_RIB_FOUND_EXACT; | |
dc95824a | 1015 | if (IS_ZEBRA_DEBUG_RIB) |
fa713d9e CF |
1016 | { |
1017 | char gate_buf[INET_ADDRSTRLEN], qgate_buf[INET_ADDRSTRLEN]; | |
1018 | inet_ntop (AF_INET, &nexthop->gate.ipv4.s_addr, gate_buf, INET_ADDRSTRLEN); | |
1019 | inet_ntop (AF_INET, &sockunion2ip(qgate), qgate_buf, INET_ADDRSTRLEN); | |
1020 | zlog_debug ("%s: qgate == %s, %s == %s", __func__, | |
1021 | qgate_buf, recursing ? "rgate" : "gate", gate_buf); | |
1022 | } | |
dc95824a | 1023 | } |
fa713d9e CF |
1024 | |
1025 | if (nexthops_active) | |
1026 | return ZEBRA_RIB_FOUND_NOGATE; | |
dc95824a DO |
1027 | |
1028 | return ZEBRA_RIB_NOTFOUND; | |
1029 | } | |
1030 | ||
718e3744 | 1031 | #ifdef HAVE_IPV6 |
1032 | struct rib * | |
1033 | rib_match_ipv6 (struct in6_addr *addr) | |
1034 | { | |
1035 | struct prefix_ipv6 p; | |
1036 | struct route_table *table; | |
1037 | struct route_node *rn; | |
1038 | struct rib *match; | |
fa713d9e CF |
1039 | struct nexthop *newhop, *tnewhop; |
1040 | int recursing; | |
718e3744 | 1041 | |
1042 | /* Lookup table. */ | |
b72ede27 | 1043 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT); |
718e3744 | 1044 | if (! table) |
1045 | return 0; | |
1046 | ||
1047 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
1048 | p.family = AF_INET6; | |
1049 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
1050 | IPV6_ADDR_COPY (&p.prefix, addr); | |
1051 | ||
1052 | rn = route_node_match (table, (struct prefix *) &p); | |
1053 | ||
1054 | while (rn) | |
1055 | { | |
1056 | route_unlock_node (rn); | |
1057 | ||
1058 | /* Pick up selected route. */ | |
9fd92e3c | 1059 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
1060 | { |
1061 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
1062 | continue; | |
1063 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
1064 | break; | |
1065 | } | |
718e3744 | 1066 | |
1067 | /* If there is no selected route or matched route is EGP, go up | |
1068 | tree. */ | |
6e26278c | 1069 | if (! match) |
718e3744 | 1070 | { |
1071 | do { | |
1072 | rn = rn->parent; | |
1073 | } while (rn && rn->info == NULL); | |
1074 | if (rn) | |
1075 | route_lock_node (rn); | |
1076 | } | |
1077 | else | |
1078 | { | |
1079 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
1080 | /* Directly point connected route. */ | |
1081 | return match; | |
1082 | else | |
1083 | { | |
fa713d9e | 1084 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) |
718e3744 | 1085 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
1086 | return match; | |
1087 | return NULL; | |
1088 | } | |
1089 | } | |
1090 | } | |
1091 | return NULL; | |
1092 | } | |
1093 | #endif /* HAVE_IPV6 */ | |
1094 | ||
7514fb77 PJ |
1095 | #define RIB_SYSTEM_ROUTE(R) \ |
1096 | ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT) | |
1097 | ||
dc95824a DO |
1098 | /* This function verifies reachability of one given nexthop, which can be |
1099 | * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored | |
1100 | * in nexthop->flags field. If the 4th parameter, 'set', is non-zero, | |
1101 | * nexthop->ifindex will be updated appropriately as well. | |
1102 | * An existing route map can turn (otherwise active) nexthop into inactive, but | |
1103 | * not vice versa. | |
1104 | * | |
1105 | * The return value is the final value of 'ACTIVE' flag. | |
1106 | */ | |
1107 | ||
d02c56cd | 1108 | static unsigned |
718e3744 | 1109 | nexthop_active_check (struct route_node *rn, struct rib *rib, |
1110 | struct nexthop *nexthop, int set) | |
1111 | { | |
f3a1732e | 1112 | rib_table_info_t *info = rn->table->info; |
718e3744 | 1113 | struct interface *ifp; |
7514fb77 | 1114 | route_map_result_t ret = RMAP_MATCH; |
7514fb77 | 1115 | int family; |
518f0eb1 | 1116 | char buf[INET6_ADDRSTRLEN+1]; |
718e3744 | 1117 | |
7a4bb9c5 DS |
1118 | if (rn->p.family == AF_INET) |
1119 | family = AFI_IP; | |
1120 | else if (rn->p.family == AF_INET6) | |
1121 | family = AFI_IP6; | |
1122 | else | |
1123 | family = 0; | |
718e3744 | 1124 | switch (nexthop->type) |
1125 | { | |
1126 | case NEXTHOP_TYPE_IFINDEX: | |
1127 | ifp = if_lookup_by_index (nexthop->ifindex); | |
3f087670 | 1128 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1129 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1130 | else | |
1131 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1132 | break; | |
718e3744 | 1133 | case NEXTHOP_TYPE_IPV6_IFNAME: |
7514fb77 PJ |
1134 | family = AFI_IP6; |
1135 | case NEXTHOP_TYPE_IFNAME: | |
718e3744 | 1136 | ifp = if_lookup_by_name (nexthop->ifname); |
3f087670 | 1137 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1138 | { |
1139 | if (set) | |
1140 | nexthop->ifindex = ifp->ifindex; | |
1141 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1142 | } | |
1143 | else | |
1144 | { | |
1145 | if (set) | |
1146 | nexthop->ifindex = 0; | |
1147 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1148 | } | |
1149 | break; | |
1150 | case NEXTHOP_TYPE_IPV4: | |
1151 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
7514fb77 | 1152 | family = AFI_IP; |
718e3744 | 1153 | if (nexthop_active_ipv4 (rib, nexthop, set, rn)) |
1154 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1155 | else | |
1156 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1157 | break; | |
1158 | #ifdef HAVE_IPV6 | |
1159 | case NEXTHOP_TYPE_IPV6: | |
7514fb77 | 1160 | family = AFI_IP6; |
718e3744 | 1161 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) |
1162 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1163 | else | |
1164 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1165 | break; | |
1166 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
fb5d585c | 1167 | /* RFC 5549, v4 prefix with v6 NH */ |
1168 | if (rn->p.family != AF_INET) | |
1169 | family = AFI_IP6; | |
718e3744 | 1170 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->gate.ipv6)) |
1171 | { | |
1172 | ifp = if_lookup_by_index (nexthop->ifindex); | |
3f087670 | 1173 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1174 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1175 | else | |
1176 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1177 | } | |
1178 | else | |
1179 | { | |
1180 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) | |
1181 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1182 | else | |
1183 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1184 | } | |
1185 | break; | |
1186 | #endif /* HAVE_IPV6 */ | |
595db7f1 | 1187 | case NEXTHOP_TYPE_BLACKHOLE: |
1188 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1189 | break; | |
718e3744 | 1190 | default: |
1191 | break; | |
1192 | } | |
7514fb77 PJ |
1193 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) |
1194 | return 0; | |
1195 | ||
f3a1732e CF |
1196 | /* XXX: What exactly do those checks do? Do we support |
1197 | * e.g. IPv4 routes with IPv6 nexthops or vice versa? */ | |
7514fb77 PJ |
1198 | if (RIB_SYSTEM_ROUTE(rib) || |
1199 | (family == AFI_IP && rn->p.family != AF_INET) || | |
1200 | (family == AFI_IP6 && rn->p.family != AF_INET6)) | |
1201 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1202 | ||
f3a1732e CF |
1203 | /* The original code didn't determine the family correctly |
1204 | * e.g. for NEXTHOP_TYPE_IFINDEX. Retrieve the correct afi | |
1205 | * from the rib_table_info in those cases. | |
1206 | * Possibly it may be better to use only the rib_table_info | |
1207 | * in every case. | |
1208 | */ | |
1209 | if (!family) | |
1210 | family = info->afi; | |
1211 | ||
c52ef59f | 1212 | memset(&nexthop->rmap_src.ipv6, 0, sizeof(union g_addr)); |
c52ef59f | 1213 | |
ca84c8ef DS |
1214 | /* It'll get set if required inside */ |
1215 | ret = zebra_route_map_check(family, rib->type, &rn->p, nexthop, rib->tag); | |
7514fb77 | 1216 | if (ret == RMAP_DENYMATCH) |
518f0eb1 DS |
1217 | { |
1218 | if (IS_ZEBRA_DEBUG_RIB) | |
1219 | { | |
1220 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, sizeof (buf)); | |
1221 | zlog_debug("%s: Filtering out %s with NH out %s due to route map", | |
1222 | __FUNCTION__, buf, nexthop->ifname); | |
1223 | } | |
1224 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1225 | } | |
718e3744 | 1226 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1227 | } | |
1228 | ||
03e232a4 DO |
1229 | /* Iterate over all nexthops of the given RIB entry and refresh their |
1230 | * ACTIVE flag. rib->nexthop_active_num is updated accordingly. If any | |
1231 | * nexthop is found to toggle the ACTIVE flag, the whole rib structure | |
1232 | * is flagged with ZEBRA_FLAG_CHANGED. The 4th 'set' argument is | |
1233 | * transparently passed to nexthop_active_check(). | |
1234 | * | |
1235 | * Return value is the new number of active nexthops. | |
1236 | */ | |
1237 | ||
a1ac18c4 | 1238 | static int |
718e3744 | 1239 | nexthop_active_update (struct route_node *rn, struct rib *rib, int set) |
1240 | { | |
1241 | struct nexthop *nexthop; | |
c52ef59f | 1242 | union g_addr prev_src; |
6e26278c DS |
1243 | unsigned int prev_active, prev_index, new_active, old_num_nh; |
1244 | ||
1245 | old_num_nh = rib->nexthop_active_num; | |
718e3744 | 1246 | |
1247 | rib->nexthop_active_num = 0; | |
1248 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1249 | ||
1250 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
03e232a4 | 1251 | { |
c52ef59f DS |
1252 | /* No protocol daemon provides src and so we're skipping tracking it */ |
1253 | prev_src = nexthop->rmap_src; | |
03e232a4 | 1254 | prev_active = CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
c3a56063 | 1255 | prev_index = nexthop->ifindex; |
03e232a4 DO |
1256 | if ((new_active = nexthop_active_check (rn, rib, nexthop, set))) |
1257 | rib->nexthop_active_num++; | |
c52ef59f | 1258 | /* Don't allow src setting on IPv6 addr for now */ |
c3a56063 | 1259 | if (prev_active != new_active || |
c52ef59f DS |
1260 | prev_index != nexthop->ifindex || |
1261 | ((nexthop->type >= NEXTHOP_TYPE_IFINDEX && | |
1262 | nexthop->type < NEXTHOP_TYPE_IPV6) && | |
0aabccc0 DD |
1263 | prev_src.ipv4.s_addr != nexthop->rmap_src.ipv4.s_addr) || |
1264 | ((nexthop->type >= NEXTHOP_TYPE_IPV6 && | |
1265 | nexthop->type < NEXTHOP_TYPE_BLACKHOLE) && | |
1266 | !(IPV6_ADDR_SAME (&prev_src.ipv6, &nexthop->rmap_src.ipv6)))) | |
6e26278c DS |
1267 | { |
1268 | SET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1269 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1270 | } | |
03e232a4 | 1271 | } |
6e26278c DS |
1272 | |
1273 | if (old_num_nh != rib->nexthop_active_num) | |
1274 | SET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1275 | ||
1276 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_CHANGED)) | |
1277 | { | |
1278 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1279 | } | |
1280 | ||
718e3744 | 1281 | return rib->nexthop_active_num; |
1282 | } | |
6baeb988 | 1283 | |
6b0655a2 | 1284 | |
718e3744 | 1285 | |
6ae24471 DS |
1286 | /* Update flag indicates whether this is a "replace" or not. Currently, this |
1287 | * is only used for IPv4. | |
1288 | */ | |
a1ac18c4 | 1289 | static void |
6ae24471 | 1290 | rib_install_kernel (struct route_node *rn, struct rib *rib, int update) |
718e3744 | 1291 | { |
1292 | int ret = 0; | |
fa713d9e CF |
1293 | struct nexthop *nexthop, *tnexthop; |
1294 | int recursing; | |
718e3744 | 1295 | |
5adc2528 AS |
1296 | /* |
1297 | * Make sure we update the FPM any time we send new information to | |
1298 | * the kernel. | |
1299 | */ | |
1300 | zfpm_trigger_update (rn, "installing in kernel"); | |
718e3744 | 1301 | switch (PREFIX_FAMILY (&rn->p)) |
1302 | { | |
1303 | case AF_INET: | |
6ae24471 DS |
1304 | if (update) |
1305 | ret = kernel_update_ipv4 (&rn->p, rib); | |
1306 | else | |
1307 | ret = kernel_add_ipv4 (&rn->p, rib); | |
718e3744 | 1308 | break; |
1309 | #ifdef HAVE_IPV6 | |
1310 | case AF_INET6: | |
1311 | ret = kernel_add_ipv6 (&rn->p, rib); | |
1312 | break; | |
1313 | #endif /* HAVE_IPV6 */ | |
1314 | } | |
1315 | ||
dc95824a | 1316 | /* This condition is never met, if we are using rt_socket.c */ |
718e3744 | 1317 | if (ret < 0) |
1318 | { | |
fa713d9e | 1319 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 1320 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
1321 | } | |
1322 | } | |
1323 | ||
1324 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 1325 | static int |
718e3744 | 1326 | rib_uninstall_kernel (struct route_node *rn, struct rib *rib) |
1327 | { | |
1328 | int ret = 0; | |
fa713d9e CF |
1329 | struct nexthop *nexthop, *tnexthop; |
1330 | int recursing; | |
718e3744 | 1331 | |
5adc2528 AS |
1332 | /* |
1333 | * Make sure we update the FPM any time we send new information to | |
1334 | * the kernel. | |
1335 | */ | |
1336 | zfpm_trigger_update (rn, "uninstalling from kernel"); | |
1337 | ||
718e3744 | 1338 | switch (PREFIX_FAMILY (&rn->p)) |
1339 | { | |
1340 | case AF_INET: | |
1341 | ret = kernel_delete_ipv4 (&rn->p, rib); | |
1342 | break; | |
1343 | #ifdef HAVE_IPV6 | |
1344 | case AF_INET6: | |
1345 | ret = kernel_delete_ipv6 (&rn->p, rib); | |
1346 | break; | |
1347 | #endif /* HAVE_IPV6 */ | |
1348 | } | |
1349 | ||
fa713d9e | 1350 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 1351 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
1352 | ||
1353 | return ret; | |
1354 | } | |
1355 | ||
1356 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 1357 | static void |
718e3744 | 1358 | rib_uninstall (struct route_node *rn, struct rib *rib) |
1359 | { | |
1360 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
1361 | { | |
5adc2528 AS |
1362 | zfpm_trigger_update (rn, "rib_uninstall"); |
1363 | ||
718e3744 | 1364 | redistribute_delete (&rn->p, rib); |
1365 | if (! RIB_SYSTEM_ROUTE (rib)) | |
1366 | rib_uninstall_kernel (rn, rib); | |
1367 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_SELECTED); | |
1368 | } | |
1369 | } | |
1370 | ||
6d691129 PJ |
1371 | static void rib_unlink (struct route_node *, struct rib *); |
1372 | ||
9fd92e3c AS |
1373 | /* |
1374 | * rib_can_delete_dest | |
1375 | * | |
1376 | * Returns TRUE if the given dest can be deleted from the table. | |
1377 | */ | |
1378 | static int | |
1379 | rib_can_delete_dest (rib_dest_t *dest) | |
1380 | { | |
1381 | if (dest->routes) | |
1382 | { | |
1383 | return 0; | |
1384 | } | |
1385 | ||
5adc2528 AS |
1386 | /* |
1387 | * Don't delete the dest if we have to update the FPM about this | |
1388 | * prefix. | |
1389 | */ | |
1390 | if (CHECK_FLAG (dest->flags, RIB_DEST_UPDATE_FPM) || | |
1391 | CHECK_FLAG (dest->flags, RIB_DEST_SENT_TO_FPM)) | |
1392 | return 0; | |
1393 | ||
9fd92e3c AS |
1394 | return 1; |
1395 | } | |
1396 | ||
1397 | /* | |
1398 | * rib_gc_dest | |
1399 | * | |
1400 | * Garbage collect the rib dest corresponding to the given route node | |
1401 | * if appropriate. | |
1402 | * | |
1403 | * Returns TRUE if the dest was deleted, FALSE otherwise. | |
1404 | */ | |
1405 | int | |
1406 | rib_gc_dest (struct route_node *rn) | |
1407 | { | |
1408 | rib_dest_t *dest; | |
1409 | char buf[INET6_ADDRSTRLEN]; | |
1410 | ||
1411 | dest = rib_dest_from_rnode (rn); | |
1412 | if (!dest) | |
1413 | return 0; | |
1414 | ||
1415 | if (!rib_can_delete_dest (dest)) | |
1416 | return 0; | |
1417 | ||
1418 | if (IS_ZEBRA_DEBUG_RIB) | |
1419 | { | |
1420 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, sizeof (buf)); | |
1421 | zlog_debug ("%s: %s/%d: removing dest from table", __func__, | |
1422 | buf, rn->p.prefixlen); | |
1423 | } | |
1424 | ||
1425 | dest->rnode = NULL; | |
1426 | XFREE (MTYPE_RIB_DEST, dest); | |
1427 | rn->info = NULL; | |
1428 | ||
1429 | /* | |
1430 | * Release the one reference that we keep on the route node. | |
1431 | */ | |
1432 | route_unlock_node (rn); | |
1433 | return 1; | |
1434 | } | |
1435 | ||
718e3744 | 1436 | /* Core function for processing routing information base. */ |
e96f9203 DO |
1437 | static void |
1438 | rib_process (struct route_node *rn) | |
718e3744 | 1439 | { |
1440 | struct rib *rib; | |
1441 | struct rib *next; | |
1442 | struct rib *fib = NULL; | |
1443 | struct rib *select = NULL; | |
6d691129 | 1444 | struct rib *del = NULL; |
d753e9ee | 1445 | int installed = 0; |
fa713d9e CF |
1446 | struct nexthop *nexthop = NULL, *tnexthop; |
1447 | int recursing; | |
f304cb48 | 1448 | char buf[INET6_ADDRSTRLEN]; |
6ae24471 | 1449 | int update_ok = 0; |
4d38fdb4 | 1450 | |
1451 | assert (rn); | |
1452 | ||
93bdadae | 1453 | if (IS_ZEBRA_DEBUG_RIB || IS_ZEBRA_DEBUG_RIB_Q) |
f304cb48 | 1454 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae | 1455 | |
9fd92e3c | 1456 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 1457 | { |
6e26278c DS |
1458 | UNSET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
1459 | ||
718e3744 | 1460 | /* Currently installed rib. */ |
1461 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
6d691129 PJ |
1462 | { |
1463 | assert (fib == NULL); | |
1464 | fib = rib; | |
1465 | } | |
ca657c65 | 1466 | |
6d691129 PJ |
1467 | /* Unlock removed routes, so they'll be freed, bar the FIB entry, |
1468 | * which we need to do do further work with below. | |
1469 | */ | |
1470 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
1471 | { | |
1472 | if (rib != fib) | |
1473 | { | |
1474 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae PJ |
1475 | zlog_debug ("%s: %s/%d: rn %p, removing rib %p", __func__, |
1476 | buf, rn->p.prefixlen, rn, rib); | |
9fd92e3c | 1477 | rib_unlink (rn, rib); |
6d691129 PJ |
1478 | } |
1479 | else | |
1480 | del = rib; | |
1481 | ||
1482 | continue; | |
1483 | } | |
4d38fdb4 | 1484 | |
718e3744 | 1485 | /* Skip unreachable nexthop. */ |
ca657c65 DS |
1486 | /* This first call to nexthop_active_update is merely to determine if |
1487 | * there's any change to nexthops associated with this RIB entry. Now, | |
1488 | * rib_process() can be invoked due to an external event such as link | |
1489 | * down or due to next-hop-tracking evaluation. In the latter case, | |
1490 | * a decision has already been made that the NHs have changed. So, no | |
1491 | * need to invoke a potentially expensive call again. Further, since | |
1492 | * the change might be in a recursive NH which is not caught in | |
1493 | * the nexthop_active_update() code. Thus, we might miss changes to | |
1494 | * recursive NHs. | |
6e26278c | 1495 | */ |
ca657c65 | 1496 | if (!CHECK_FLAG(rib->flags, ZEBRA_FLAG_CHANGED) && |
6e26278c | 1497 | ! nexthop_active_update (rn, rib, 0)) |
7021c425 | 1498 | continue; |
718e3744 | 1499 | |
1500 | /* Infinit distance. */ | |
1501 | if (rib->distance == DISTANCE_INFINITY) | |
8733ba72 DS |
1502 | { |
1503 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1504 | continue; | |
1505 | } | |
718e3744 | 1506 | |
af887b51 | 1507 | /* Newly selected rib, the common case. */ |
1508 | if (!select) | |
1509 | { | |
1510 | select = rib; | |
1511 | continue; | |
1512 | } | |
1513 | ||
1514 | /* filter route selection in following order: | |
af887b51 | 1515 | * - connected beats other types |
a8d9c1f9 | 1516 | * - lower distance beats higher |
af887b51 | 1517 | * - lower metric beats higher for equal distance |
1518 | * - last, hence oldest, route wins tie break. | |
1519 | */ | |
a1038a15 | 1520 | |
1521 | /* Connected routes. Pick the last connected | |
1522 | * route of the set of lowest metric connected routes. | |
1523 | */ | |
a8d9c1f9 | 1524 | if (rib->type == ZEBRA_ROUTE_CONNECT) |
1525 | { | |
a1038a15 | 1526 | if (select->type != ZEBRA_ROUTE_CONNECT |
a8d9c1f9 | 1527 | || rib->metric <= select->metric) |
8733ba72 DS |
1528 | { |
1529 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); | |
1530 | select = rib; | |
1531 | } | |
1532 | else | |
1533 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
a1038a15 | 1534 | continue; |
a8d9c1f9 | 1535 | } |
1536 | else if (select->type == ZEBRA_ROUTE_CONNECT) | |
8733ba72 DS |
1537 | { |
1538 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1539 | continue; | |
1540 | } | |
a8d9c1f9 | 1541 | |
1542 | /* higher distance loses */ | |
1543 | if (rib->distance > select->distance) | |
8733ba72 DS |
1544 | { |
1545 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1546 | continue; | |
1547 | } | |
a8d9c1f9 | 1548 | |
1549 | /* lower wins */ | |
1550 | if (rib->distance < select->distance) | |
1551 | { | |
8733ba72 | 1552 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); |
af887b51 | 1553 | select = rib; |
a8d9c1f9 | 1554 | continue; |
1555 | } | |
1556 | ||
1557 | /* metric tie-breaks equal distance */ | |
1558 | if (rib->metric <= select->metric) | |
8733ba72 DS |
1559 | { |
1560 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); | |
1561 | select = rib; | |
1562 | } | |
9fd92e3c | 1563 | } /* RNODE_FOREACH_RIB_SAFE */ |
dc95824a DO |
1564 | |
1565 | /* After the cycle is finished, the following pointers will be set: | |
1566 | * select --- the winner RIB entry, if any was found, otherwise NULL | |
1567 | * fib --- the SELECTED RIB entry, if any, otherwise NULL | |
1568 | * del --- equal to fib, if fib is queued for deletion, NULL otherwise | |
1569 | * rib --- NULL | |
1570 | */ | |
1571 | ||
1572 | /* Same RIB entry is selected. Update FIB and finish. */ | |
718e3744 | 1573 | if (select && select == fib) |
1574 | { | |
6d691129 | 1575 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1576 | zlog_debug ("%s: %s/%d: Updating existing route, select %p, fib %p", |
1577 | __func__, buf, rn->p.prefixlen, select, fib); | |
718e3744 | 1578 | if (CHECK_FLAG (select->flags, ZEBRA_FLAG_CHANGED)) |
4d38fdb4 | 1579 | { |
5adc2528 AS |
1580 | zfpm_trigger_update (rn, "updating existing route"); |
1581 | ||
4d38fdb4 | 1582 | if (! RIB_SYSTEM_ROUTE (select)) |
6ae24471 DS |
1583 | { |
1584 | /* For v4, use the replace semantics of netlink. */ | |
1585 | if (PREFIX_FAMILY (&rn->p) == AF_INET) | |
5048fe14 | 1586 | update_ok = 1; |
6ae24471 DS |
1587 | else |
1588 | rib_uninstall_kernel (rn, select); | |
1589 | } | |
1590 | ||
718e3744 | 1591 | |
4d38fdb4 | 1592 | /* Set real nexthop. */ |
6e26278c DS |
1593 | /* Need to check if any NHs are active to clear the |
1594 | * the selected flag | |
1595 | */ | |
1596 | if (nexthop_active_update (rn, select, 1)) | |
1597 | { | |
6ae24471 DS |
1598 | /* Clear FIB flag for IPv4, install will set it */ |
1599 | if (update_ok) | |
1600 | { | |
1601 | for (nexthop = select->nexthop; nexthop; nexthop = nexthop->next) | |
1602 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1603 | } | |
6e26278c | 1604 | if (! RIB_SYSTEM_ROUTE (select)) |
6ae24471 | 1605 | rib_install_kernel (rn, select, update_ok); |
5048fe14 | 1606 | |
1607 | /* assuming that the receiver knows how to dedup */ | |
c41fc67b | 1608 | redistribute_update (&rn->p, select, NULL); |
6e26278c DS |
1609 | } |
1610 | else | |
1611 | { | |
5048fe14 | 1612 | /* Withdraw unreachable redistribute route */ |
1613 | redistribute_delete(&rn->p, select); | |
1614 | ||
6ae24471 DS |
1615 | /* For IPv4, do the uninstall here. */ |
1616 | if (update_ok) | |
1617 | rib_uninstall_kernel (rn, select); | |
6e26278c DS |
1618 | UNSET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); |
1619 | } | |
ca657c65 | 1620 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); |
6e26278c | 1621 | } |
d753e9ee | 1622 | else if (! RIB_SYSTEM_ROUTE (select)) |
4d38fdb4 | 1623 | { |
1624 | /* Housekeeping code to deal with | |
1625 | race conditions in kernel with linux | |
1626 | netlink reporting interface up before IPv4 or IPv6 protocol | |
1627 | is ready to add routes. | |
1628 | This makes sure the routes are IN the kernel. | |
1629 | */ | |
1630 | ||
fa713d9e | 1631 | for (ALL_NEXTHOPS_RO(select->nexthop, nexthop, tnexthop, recursing)) |
a3aaf5b0 | 1632 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
4d38fdb4 | 1633 | { |
a3aaf5b0 DO |
1634 | installed = 1; |
1635 | break; | |
4d38fdb4 | 1636 | } |
1637 | if (! installed) | |
6ae24471 | 1638 | rib_install_kernel (rn, select, 0); |
4d38fdb4 | 1639 | } |
6d691129 | 1640 | goto end; |
718e3744 | 1641 | } |
1642 | ||
dc95824a DO |
1643 | /* At this point we either haven't found the best RIB entry or it is |
1644 | * different from what we currently intend to flag with SELECTED. In both | |
1645 | * cases, if a RIB block is present in FIB, it should be withdrawn. | |
1646 | */ | |
718e3744 | 1647 | if (fib) |
1648 | { | |
6d691129 | 1649 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1650 | zlog_debug ("%s: %s/%d: Removing existing route, fib %p", __func__, |
1651 | buf, rn->p.prefixlen, fib); | |
5adc2528 AS |
1652 | |
1653 | zfpm_trigger_update (rn, "removing existing route"); | |
1654 | ||
5048fe14 | 1655 | /* If there's no route to replace this with, withdraw redistribute */ |
1656 | if (!select) | |
1657 | redistribute_delete(&rn->p, fib); | |
6ae24471 | 1658 | |
718e3744 | 1659 | if (! RIB_SYSTEM_ROUTE (fib)) |
6ae24471 DS |
1660 | { |
1661 | /* For v4, use the replace semantics of netlink -- only if there is | |
1662 | * another route to replace this with. | |
1663 | */ | |
1664 | if (PREFIX_FAMILY (&rn->p) == AF_INET) | |
1665 | { | |
5048fe14 | 1666 | if (!select) |
6ae24471 DS |
1667 | rib_uninstall_kernel (rn, fib); |
1668 | else | |
1669 | update_ok = 1; | |
1670 | } | |
1671 | else | |
1672 | rib_uninstall_kernel (rn, fib); | |
1673 | } | |
718e3744 | 1674 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); |
1675 | ||
1676 | /* Set real nexthop. */ | |
1677 | nexthop_active_update (rn, fib, 1); | |
ca657c65 | 1678 | UNSET_FLAG(fib->flags, ZEBRA_FLAG_CHANGED); |
718e3744 | 1679 | } |
1680 | ||
dc95824a DO |
1681 | /* Regardless of some RIB entry being SELECTED or not before, now we can |
1682 | * tell, that if a new winner exists, FIB is still not updated with this | |
1683 | * data, but ready to be. | |
1684 | */ | |
718e3744 | 1685 | if (select) |
1686 | { | |
6d691129 | 1687 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1688 | zlog_debug ("%s: %s/%d: Adding route, select %p", __func__, buf, |
1689 | rn->p.prefixlen, select); | |
5adc2528 AS |
1690 | |
1691 | zfpm_trigger_update (rn, "new route selected"); | |
1692 | ||
718e3744 | 1693 | /* Set real nexthop. */ |
6e26278c DS |
1694 | if (nexthop_active_update (rn, select, 1)) |
1695 | { | |
6ae24471 DS |
1696 | /* Clear FIB flag for IPv4 for previous installed route. */ |
1697 | if (update_ok) | |
1698 | { | |
1699 | assert (fib); | |
1700 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
1701 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1702 | } | |
6e26278c | 1703 | if (! RIB_SYSTEM_ROUTE (select)) |
6ae24471 | 1704 | rib_install_kernel (rn, select, update_ok); |
6e26278c | 1705 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); |
5048fe14 | 1706 | /* Unconditionally announce, this part is exercised by new routes */ |
c41fc67b | 1707 | /* If we cannot add, for example route added is learnt by the */ |
1708 | /* protocol we're trying to redistribute to, delete the redist */ | |
1709 | /* This is notified by setting the is_update to 1 */ | |
1710 | redistribute_update (&rn->p, select, fib); | |
6e26278c | 1711 | } |
6ae24471 DS |
1712 | else |
1713 | { | |
1714 | /* For IPv4, uninstall prior route here, if any. */ | |
1715 | if (update_ok) | |
1716 | { | |
1717 | assert (fib); | |
1718 | rib_uninstall_kernel (rn, fib); | |
1719 | } | |
5048fe14 | 1720 | /* if "select", the earlier redist delete wouldn't have happened */ |
1721 | redistribute_delete(&rn->p, select); | |
6ae24471 | 1722 | } |
ca657c65 | 1723 | UNSET_FLAG(select->flags, ZEBRA_FLAG_CHANGED); |
718e3744 | 1724 | } |
4d38fdb4 | 1725 | |
6d691129 PJ |
1726 | /* FIB route was removed, should be deleted */ |
1727 | if (del) | |
1728 | { | |
1729 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae PJ |
1730 | zlog_debug ("%s: %s/%d: Deleting fib %p, rn %p", __func__, buf, |
1731 | rn->p.prefixlen, del, rn); | |
6d691129 PJ |
1732 | rib_unlink (rn, del); |
1733 | } | |
4d38fdb4 | 1734 | |
6d691129 PJ |
1735 | end: |
1736 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
93bdadae | 1737 | zlog_debug ("%s: %s/%d: rn %p dequeued", __func__, buf, rn->p.prefixlen, rn); |
9fd92e3c AS |
1738 | |
1739 | /* | |
1740 | * Check if the dest can be deleted now. | |
1741 | */ | |
1742 | rib_gc_dest (rn); | |
e96f9203 DO |
1743 | } |
1744 | ||
5110a0c6 SH |
1745 | /* Take a list of route_node structs and return 1, if there was a record |
1746 | * picked from it and processed by rib_process(). Don't process more, | |
1747 | * than one RN record; operate only in the specified sub-queue. | |
e96f9203 | 1748 | */ |
ef9b113e | 1749 | static unsigned int |
e96f9203 DO |
1750 | process_subq (struct list * subq, u_char qindex) |
1751 | { | |
5110a0c6 | 1752 | struct listnode *lnode = listhead (subq); |
e96f9203 | 1753 | struct route_node *rnode; |
5110a0c6 SH |
1754 | |
1755 | if (!lnode) | |
e96f9203 | 1756 | return 0; |
5110a0c6 | 1757 | |
e96f9203 DO |
1758 | rnode = listgetdata (lnode); |
1759 | rib_process (rnode); | |
5110a0c6 | 1760 | |
9fd92e3c AS |
1761 | if (rnode->info) |
1762 | UNSET_FLAG (rib_dest_from_rnode (rnode)->flags, RIB_ROUTE_QUEUED (qindex)); | |
1763 | ||
67b9467f | 1764 | #if 0 |
5110a0c6 SH |
1765 | else |
1766 | { | |
1767 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", | |
1768 | __func__, rnode, rnode->lock); | |
1769 | zlog_backtrace(LOG_DEBUG); | |
1770 | } | |
67b9467f | 1771 | #endif |
e96f9203 DO |
1772 | route_unlock_node (rnode); |
1773 | list_delete_node (subq, lnode); | |
1774 | return 1; | |
1775 | } | |
1776 | ||
fb018d25 DS |
1777 | /* |
1778 | * All meta queues have been processed. Trigger next-hop evaluation. | |
1779 | */ | |
1780 | static void | |
1781 | meta_queue_process_complete (struct work_queue *dummy) | |
1782 | { | |
078430f6 DS |
1783 | zebra_evaluate_rnh(0, AF_INET, 0, RNH_NEXTHOP_TYPE, NULL); |
1784 | zebra_evaluate_rnh(0, AF_INET, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
fb018d25 | 1785 | #ifdef HAVE_IPV6 |
078430f6 DS |
1786 | zebra_evaluate_rnh(0, AF_INET6, 0, RNH_NEXTHOP_TYPE, NULL); |
1787 | zebra_evaluate_rnh(0, AF_INET6, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
fb018d25 DS |
1788 | #endif /* HAVE_IPV6 */ |
1789 | } | |
1790 | ||
e96f9203 DO |
1791 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from |
1792 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and data | |
1793 | * is pointed to the meta queue structure. | |
1794 | */ | |
1795 | static wq_item_status | |
1796 | meta_queue_process (struct work_queue *dummy, void *data) | |
1797 | { | |
1798 | struct meta_queue * mq = data; | |
5110a0c6 SH |
1799 | unsigned i; |
1800 | ||
e96f9203 DO |
1801 | for (i = 0; i < MQ_SIZE; i++) |
1802 | if (process_subq (mq->subq[i], i)) | |
5110a0c6 SH |
1803 | { |
1804 | mq->size--; | |
1805 | break; | |
1806 | } | |
e96f9203 DO |
1807 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; |
1808 | } | |
1809 | ||
9fd92e3c AS |
1810 | /* |
1811 | * Map from rib types to queue type (priority) in meta queue | |
1812 | */ | |
5110a0c6 SH |
1813 | static const u_char meta_queue_map[ZEBRA_ROUTE_MAX] = { |
1814 | [ZEBRA_ROUTE_SYSTEM] = 4, | |
1815 | [ZEBRA_ROUTE_KERNEL] = 0, | |
1816 | [ZEBRA_ROUTE_CONNECT] = 0, | |
1817 | [ZEBRA_ROUTE_STATIC] = 1, | |
1818 | [ZEBRA_ROUTE_RIP] = 2, | |
1819 | [ZEBRA_ROUTE_RIPNG] = 2, | |
1820 | [ZEBRA_ROUTE_OSPF] = 2, | |
1821 | [ZEBRA_ROUTE_OSPF6] = 2, | |
1822 | [ZEBRA_ROUTE_ISIS] = 2, | |
1823 | [ZEBRA_ROUTE_BGP] = 3, | |
1824 | [ZEBRA_ROUTE_HSLS] = 4, | |
5734509c | 1825 | [ZEBRA_ROUTE_BABEL] = 2, |
7a4bb9c5 | 1826 | [ZEBRA_ROUTE_TABLE] = 1, |
5110a0c6 SH |
1827 | }; |
1828 | ||
1829 | /* Look into the RN and queue it into one or more priority queues, | |
1830 | * increasing the size for each data push done. | |
e96f9203 | 1831 | */ |
ef9b113e SH |
1832 | static void |
1833 | rib_meta_queue_add (struct meta_queue *mq, struct route_node *rn) | |
e96f9203 | 1834 | { |
e96f9203 DO |
1835 | struct rib *rib; |
1836 | char buf[INET6_ADDRSTRLEN]; | |
5110a0c6 | 1837 | |
e96f9203 DO |
1838 | if (IS_ZEBRA_DEBUG_RIB_Q) |
1839 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
5110a0c6 | 1840 | |
9fd92e3c | 1841 | RNODE_FOREACH_RIB (rn, rib) |
e96f9203 | 1842 | { |
5110a0c6 SH |
1843 | u_char qindex = meta_queue_map[rib->type]; |
1844 | ||
1845 | /* Invariant: at this point we always have rn->info set. */ | |
9fd92e3c AS |
1846 | if (CHECK_FLAG (rib_dest_from_rnode (rn)->flags, |
1847 | RIB_ROUTE_QUEUED (qindex))) | |
5110a0c6 SH |
1848 | { |
1849 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
1850 | zlog_debug ("%s: %s/%d: rn %p is already queued in sub-queue %u", | |
1851 | __func__, buf, rn->p.prefixlen, rn, qindex); | |
1852 | continue; | |
1853 | } | |
1854 | ||
9fd92e3c | 1855 | SET_FLAG (rib_dest_from_rnode (rn)->flags, RIB_ROUTE_QUEUED (qindex)); |
5110a0c6 SH |
1856 | listnode_add (mq->subq[qindex], rn); |
1857 | route_lock_node (rn); | |
1858 | mq->size++; | |
1859 | ||
e96f9203 | 1860 | if (IS_ZEBRA_DEBUG_RIB_Q) |
5110a0c6 SH |
1861 | zlog_debug ("%s: %s/%d: queued rn %p into sub-queue %u", |
1862 | __func__, buf, rn->p.prefixlen, rn, qindex); | |
e96f9203 | 1863 | } |
4d38fdb4 | 1864 | } |
1865 | ||
6d691129 | 1866 | /* Add route_node to work queue and schedule processing */ |
6e26278c | 1867 | void |
6d691129 | 1868 | rib_queue_add (struct zebra_t *zebra, struct route_node *rn) |
4d38fdb4 | 1869 | { |
fc328ac9 SV |
1870 | char buf[INET_ADDRSTRLEN]; |
1871 | assert (zebra && rn); | |
4d38fdb4 | 1872 | |
93bdadae | 1873 | if (IS_ZEBRA_DEBUG_RIB_Q) |
fc328ac9 SV |
1874 | inet_ntop (AF_INET, &rn->p.u.prefix, buf, INET_ADDRSTRLEN); |
1875 | ||
1876 | /* Pointless to queue a route_node with no RIB entries to add or remove */ | |
9fd92e3c | 1877 | if (!rnode_to_ribs (rn)) |
6d691129 | 1878 | { |
fc328ac9 SV |
1879 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", |
1880 | __func__, rn, rn->lock); | |
1881 | zlog_backtrace(LOG_DEBUG); | |
1882 | return; | |
1883 | } | |
1884 | ||
1885 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
1886 | zlog_info ("%s: %s/%d: work queue added", __func__, buf, rn->p.prefixlen); | |
1887 | ||
1888 | assert (zebra); | |
4d38fdb4 | 1889 | |
fc328ac9 SV |
1890 | if (zebra->ribq == NULL) |
1891 | { | |
1892 | zlog_err ("%s: work_queue does not exist!", __func__); | |
1893 | return; | |
4d38fdb4 | 1894 | } |
4d38fdb4 | 1895 | |
cc2dd928 SH |
1896 | /* |
1897 | * The RIB queue should normally be either empty or holding the only | |
1898 | * work_queue_item element. In the latter case this element would | |
1899 | * hold a pointer to the meta queue structure, which must be used to | |
1900 | * actually queue the route nodes to process. So create the MQ | |
1901 | * holder, if necessary, then push the work into it in any case. | |
e96f9203 DO |
1902 | * This semantics was introduced after 0.99.9 release. |
1903 | */ | |
e96f9203 DO |
1904 | if (!zebra->ribq->items->count) |
1905 | work_queue_add (zebra->ribq, zebra->mq); | |
1906 | ||
1907 | rib_meta_queue_add (zebra->mq, rn); | |
fc328ac9 SV |
1908 | |
1909 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
1910 | zlog_debug ("%s: %s/%d: rn %p queued", __func__, buf, rn->p.prefixlen, rn); | |
1911 | ||
1912 | return; | |
4d38fdb4 | 1913 | } |
1914 | ||
5110a0c6 SH |
1915 | /* Create new meta queue. |
1916 | A destructor function doesn't seem to be necessary here. | |
1917 | */ | |
ef9b113e SH |
1918 | static struct meta_queue * |
1919 | meta_queue_new (void) | |
e96f9203 DO |
1920 | { |
1921 | struct meta_queue *new; | |
5110a0c6 SH |
1922 | unsigned i; |
1923 | ||
1924 | new = XCALLOC (MTYPE_WORK_QUEUE, sizeof (struct meta_queue)); | |
1925 | assert(new); | |
e96f9203 | 1926 | |
e96f9203 | 1927 | for (i = 0; i < MQ_SIZE; i++) |
5110a0c6 SH |
1928 | { |
1929 | new->subq[i] = list_new (); | |
1930 | assert(new->subq[i]); | |
1931 | } | |
1932 | ||
e96f9203 DO |
1933 | return new; |
1934 | } | |
1935 | ||
4d38fdb4 | 1936 | /* initialise zebra rib work queue */ |
a1ac18c4 | 1937 | static void |
4d38fdb4 | 1938 | rib_queue_init (struct zebra_t *zebra) |
1939 | { | |
fc328ac9 SV |
1940 | assert (zebra); |
1941 | ||
4d38fdb4 | 1942 | if (! (zebra->ribq = work_queue_new (zebra->master, |
6d691129 | 1943 | "route_node processing"))) |
4d38fdb4 | 1944 | { |
6d691129 | 1945 | zlog_err ("%s: could not initialise work queue!", __func__); |
4d38fdb4 | 1946 | return; |
1947 | } | |
1948 | ||
1949 | /* fill in the work queue spec */ | |
e96f9203 | 1950 | zebra->ribq->spec.workfunc = &meta_queue_process; |
4d38fdb4 | 1951 | zebra->ribq->spec.errorfunc = NULL; |
fb018d25 | 1952 | zebra->ribq->spec.completion_func = &meta_queue_process_complete; |
4d38fdb4 | 1953 | /* XXX: TODO: These should be runtime configurable via vty */ |
1954 | zebra->ribq->spec.max_retries = 3; | |
457eb9af | 1955 | zebra->ribq->spec.hold = rib_process_hold_time; |
4d38fdb4 | 1956 | |
e96f9203 | 1957 | if (!(zebra->mq = meta_queue_new ())) |
fc328ac9 | 1958 | { |
e96f9203 | 1959 | zlog_err ("%s: could not initialise meta queue!", __func__); |
fc328ac9 SV |
1960 | return; |
1961 | } | |
1962 | return; | |
718e3744 | 1963 | } |
1964 | ||
6d691129 PJ |
1965 | /* RIB updates are processed via a queue of pointers to route_nodes. |
1966 | * | |
1967 | * The queue length is bounded by the maximal size of the routing table, | |
1968 | * as a route_node will not be requeued, if already queued. | |
1969 | * | |
3c0755dc PJ |
1970 | * RIBs are submitted via rib_addnode or rib_delnode which set minimal |
1971 | * state, or static_install_ipv{4,6} (when an existing RIB is updated) | |
1972 | * and then submit route_node to queue for best-path selection later. | |
1973 | * Order of add/delete state changes are preserved for any given RIB. | |
6d691129 PJ |
1974 | * |
1975 | * Deleted RIBs are reaped during best-path selection. | |
1976 | * | |
1977 | * rib_addnode | |
1978 | * |-> rib_link or unset RIB_ENTRY_REMOVE |->Update kernel with | |
3c0755dc PJ |
1979 | * |-------->| | best RIB, if required |
1980 | * | | | |
1981 | * static_install->|->rib_addqueue...... -> rib_process | |
1982 | * | | | |
1983 | * |-------->| |-> rib_unlink | |
6d691129 PJ |
1984 | * |-> set RIB_ENTRY_REMOVE | |
1985 | * rib_delnode (RIB freed) | |
1986 | * | |
9fd92e3c AS |
1987 | * The 'info' pointer of a route_node points to a rib_dest_t |
1988 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
1989 | * dest is created on-demand by rib_link() and is kept around at least | |
1990 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
6d691129 PJ |
1991 | * |
1992 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): | |
1993 | * | |
1994 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
1995 | * - dest attached to route_node: |
1996 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
1997 | * - route_node processing queue |
1998 | * - managed by: rib_addqueue, rib_process. | |
1999 | * | |
2000 | */ | |
2001 | ||
718e3744 | 2002 | /* Add RIB to head of the route node. */ |
a1ac18c4 | 2003 | static void |
6d691129 | 2004 | rib_link (struct route_node *rn, struct rib *rib) |
718e3744 | 2005 | { |
2006 | struct rib *head; | |
9fd92e3c | 2007 | rib_dest_t *dest; |
f304cb48 | 2008 | char buf[INET6_ADDRSTRLEN]; |
7a4bb9c5 | 2009 | afi_t afi; |
9fd92e3c | 2010 | |
4d38fdb4 | 2011 | assert (rib && rn); |
2012 | ||
6d691129 | 2013 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae | 2014 | { |
f304cb48 | 2015 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae PJ |
2016 | zlog_debug ("%s: %s/%d: rn %p, rib %p", __func__, |
2017 | buf, rn->p.prefixlen, rn, rib); | |
2018 | } | |
6d691129 | 2019 | |
9fd92e3c AS |
2020 | dest = rib_dest_from_rnode (rn); |
2021 | if (!dest) | |
6d691129 PJ |
2022 | { |
2023 | if (IS_ZEBRA_DEBUG_RIB) | |
9fd92e3c AS |
2024 | { |
2025 | zlog_debug ("%s: %s/%d: adding dest to table", __func__, | |
2026 | buf, rn->p.prefixlen); | |
2027 | } | |
2028 | ||
2029 | dest = XCALLOC (MTYPE_RIB_DEST, sizeof (rib_dest_t)); | |
2030 | route_lock_node (rn); /* rn route table reference */ | |
2031 | rn->info = dest; | |
2032 | dest->rnode = rn; | |
2033 | } | |
2034 | ||
2035 | head = dest->routes; | |
2036 | if (head) | |
2037 | { | |
6d691129 | 2038 | head->prev = rib; |
6d691129 | 2039 | } |
718e3744 | 2040 | rib->next = head; |
9fd92e3c | 2041 | dest->routes = rib; |
7a4bb9c5 DS |
2042 | |
2043 | /* Further processing only if entry is in main table */ | |
2044 | if ((rib->table == RT_TABLE_MAIN) || (rib->table == zebrad.rtm_table_default)) | |
2045 | rib_queue_add (&zebrad, rn); | |
2046 | else | |
2047 | { | |
2048 | if (IS_ZEBRA_DEBUG_RIB) | |
2049 | { | |
2050 | zlog_debug ("%s: %s/%d: Skipping further RIB processing of non-main table", | |
2051 | __func__, buf, rn->p.prefixlen); | |
2052 | } | |
2053 | afi = (rn->p.family == AF_INET) ? AFI_IP : | |
2054 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2055 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
2056 | zebra_add_import_table_entry(rn, rib); | |
2057 | } | |
718e3744 | 2058 | } |
2059 | ||
a1ac18c4 | 2060 | static void |
6d691129 | 2061 | rib_addnode (struct route_node *rn, struct rib *rib) |
718e3744 | 2062 | { |
6d691129 PJ |
2063 | /* RIB node has been un-removed before route-node is processed. |
2064 | * route_node must hence already be on the queue for processing.. | |
2065 | */ | |
2066 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2067 | { | |
2068 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae | 2069 | { |
f304cb48 DO |
2070 | char buf[INET6_ADDRSTRLEN]; |
2071 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
93bdadae PJ |
2072 | zlog_debug ("%s: %s/%d: rn %p, un-removed rib %p", |
2073 | __func__, buf, rn->p.prefixlen, rn, rib); | |
2074 | } | |
6d691129 PJ |
2075 | UNSET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
2076 | return; | |
2077 | } | |
2078 | rib_link (rn, rib); | |
2079 | } | |
2080 | ||
9fd92e3c AS |
2081 | /* |
2082 | * rib_unlink | |
2083 | * | |
2084 | * Detach a rib structure from a route_node. | |
2085 | * | |
2086 | * Note that a call to rib_unlink() should be followed by a call to | |
2087 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
2088 | * longer required to be deleted. | |
2089 | */ | |
6d691129 PJ |
2090 | static void |
2091 | rib_unlink (struct route_node *rn, struct rib *rib) | |
2092 | { | |
f304cb48 | 2093 | char buf[INET6_ADDRSTRLEN]; |
9fd92e3c | 2094 | rib_dest_t *dest; |
6d691129 | 2095 | |
4d38fdb4 | 2096 | assert (rn && rib); |
6d691129 PJ |
2097 | |
2098 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae | 2099 | { |
f304cb48 | 2100 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae PJ |
2101 | zlog_debug ("%s: %s/%d: rn %p, rib %p", |
2102 | __func__, buf, rn->p.prefixlen, rn, rib); | |
2103 | } | |
6d691129 | 2104 | |
9fd92e3c AS |
2105 | dest = rib_dest_from_rnode (rn); |
2106 | ||
718e3744 | 2107 | if (rib->next) |
2108 | rib->next->prev = rib->prev; | |
6d691129 | 2109 | |
718e3744 | 2110 | if (rib->prev) |
2111 | rib->prev->next = rib->next; | |
2112 | else | |
6d691129 | 2113 | { |
9fd92e3c | 2114 | dest->routes = rib->next; |
6d691129 PJ |
2115 | } |
2116 | ||
2117 | /* free RIB and nexthops */ | |
6e26278c | 2118 | nexthops_free(rib->nexthop, rn); |
6d691129 PJ |
2119 | XFREE (MTYPE_RIB, rib); |
2120 | ||
6d691129 PJ |
2121 | } |
2122 | ||
2123 | static void | |
2124 | rib_delnode (struct route_node *rn, struct rib *rib) | |
2125 | { | |
7a4bb9c5 DS |
2126 | afi_t afi; |
2127 | ||
6d691129 | 2128 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae | 2129 | { |
f304cb48 DO |
2130 | char buf[INET6_ADDRSTRLEN]; |
2131 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
93bdadae PJ |
2132 | zlog_debug ("%s: %s/%d: rn %p, rib %p, removing", __func__, |
2133 | buf, rn->p.prefixlen, rn, rib); | |
2134 | } | |
6d691129 | 2135 | SET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
7a4bb9c5 DS |
2136 | |
2137 | if ((rib->table == RT_TABLE_MAIN) || (rib->table == zebrad.rtm_table_default)) | |
2138 | rib_queue_add (&zebrad, rn); | |
2139 | else | |
2140 | { | |
2141 | afi = (rn->p.family == AF_INET) ? AFI_IP : | |
2142 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2143 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
2144 | zebra_del_import_table_entry(rn, rib); | |
2145 | /* Just clean up if non main table */ | |
2146 | rib_unlink(rn, rib); | |
2147 | } | |
718e3744 | 2148 | } |
2149 | ||
2150 | int | |
7c8ff89e | 2151 | rib_add_ipv4 (int type, u_short instance, int flags, struct prefix_ipv4 *p, |
7514fb77 | 2152 | struct in_addr *gate, struct in_addr *src, |
7a4bb9c5 | 2153 | unsigned int ifindex, u_int32_t table_id, |
cddf391b | 2154 | u_int32_t metric, u_char distance, safi_t safi) |
718e3744 | 2155 | { |
2156 | struct rib *rib; | |
2157 | struct rib *same = NULL; | |
2158 | struct route_table *table; | |
2159 | struct route_node *rn; | |
2160 | struct nexthop *nexthop; | |
2161 | ||
2162 | /* Lookup table. */ | |
7a4bb9c5 DS |
2163 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) |
2164 | { | |
b72ede27 | 2165 | table = zebra_vrf_table (AFI_IP, safi, VRF_DEFAULT); |
7a4bb9c5 DS |
2166 | } |
2167 | else | |
2168 | { | |
b72ede27 | 2169 | table = zebra_vrf_other_route_table (AFI_IP, table_id, VRF_DEFAULT); |
7a4bb9c5 | 2170 | } |
718e3744 | 2171 | if (! table) |
2172 | return 0; | |
2173 | ||
2174 | /* Make it sure prefixlen is applied to the prefix. */ | |
2175 | apply_mask_ipv4 (p); | |
2176 | ||
2177 | /* Set default distance by route type. */ | |
2178 | if (distance == 0) | |
2179 | { | |
837d16cc | 2180 | if ((unsigned)type >= array_size(route_info)) |
7052f228 DL |
2181 | distance = 150; |
2182 | else | |
2183 | distance = route_info[type].distance; | |
718e3744 | 2184 | |
2185 | /* iBGP distance is 200. */ | |
2186 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
2187 | distance = 200; | |
2188 | } | |
2189 | ||
2190 | /* Lookup route node.*/ | |
2191 | rn = route_node_get (table, (struct prefix *) p); | |
2192 | ||
2193 | /* If same type of route are installed, treat it as a implicit | |
2194 | withdraw. */ | |
9fd92e3c | 2195 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2196 | { |
6d691129 PJ |
2197 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2198 | continue; | |
2199 | ||
ebf1ead0 | 2200 | if (rib->type != type) |
2201 | continue; | |
7c8ff89e DS |
2202 | if (rib->instance != instance) |
2203 | continue; | |
7a4bb9c5 | 2204 | |
ebf1ead0 | 2205 | if (rib->type != ZEBRA_ROUTE_CONNECT) |
4d38fdb4 | 2206 | { |
2207 | same = rib; | |
2208 | break; | |
2209 | } | |
ebf1ead0 | 2210 | /* Duplicate connected route comes in. */ |
2211 | else if ((nexthop = rib->nexthop) && | |
2212 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
6d691129 PJ |
2213 | nexthop->ifindex == ifindex && |
2214 | !CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
ebf1ead0 | 2215 | { |
2216 | rib->refcnt++; | |
2217 | return 0 ; | |
2218 | } | |
718e3744 | 2219 | } |
2220 | ||
2221 | /* Allocate new rib structure. */ | |
4d38fdb4 | 2222 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
718e3744 | 2223 | rib->type = type; |
7c8ff89e | 2224 | rib->instance = instance; |
718e3744 | 2225 | rib->distance = distance; |
2226 | rib->flags = flags; | |
2227 | rib->metric = metric; | |
7a4bb9c5 | 2228 | rib->table = table_id; |
718e3744 | 2229 | rib->nexthop_num = 0; |
2230 | rib->uptime = time (NULL); | |
2231 | ||
2232 | /* Nexthop settings. */ | |
2233 | if (gate) | |
2234 | { | |
2235 | if (ifindex) | |
7514fb77 | 2236 | nexthop_ipv4_ifindex_add (rib, gate, src, ifindex); |
718e3744 | 2237 | else |
7514fb77 | 2238 | nexthop_ipv4_add (rib, gate, src); |
718e3744 | 2239 | } |
2240 | else | |
2241 | nexthop_ifindex_add (rib, ifindex); | |
2242 | ||
2243 | /* If this route is kernel route, set FIB flag to the route. */ | |
2244 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
2245 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2246 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2247 | ||
2248 | /* Link new rib to node.*/ | |
dc95824a | 2249 | if (IS_ZEBRA_DEBUG_RIB) |
7a4bb9c5 DS |
2250 | { |
2251 | zlog_debug ("%s: called rib_addnode (%p, %p) on new RIB entry", | |
2252 | __func__, rn, rib); | |
2253 | rib_dump ((struct prefix *)p, rib); | |
2254 | } | |
718e3744 | 2255 | rib_addnode (rn, rib); |
4d38fdb4 | 2256 | |
718e3744 | 2257 | /* Free implicit route.*/ |
2258 | if (same) | |
dc95824a DO |
2259 | { |
2260 | if (IS_ZEBRA_DEBUG_RIB) | |
2261 | zlog_debug ("%s: calling rib_delnode (%p, %p)", __func__, rn, rib); | |
4d38fdb4 | 2262 | rib_delnode (rn, same); |
dc95824a | 2263 | } |
4d38fdb4 | 2264 | |
2265 | route_unlock_node (rn); | |
718e3744 | 2266 | return 0; |
2267 | } | |
2268 | ||
dc95824a DO |
2269 | /* This function dumps the contents of a given RIB entry into |
2270 | * standard debug log. Calling function name and IP prefix in | |
2271 | * question are passed as 1st and 2nd arguments. | |
2272 | */ | |
2273 | ||
f7bf4153 DL |
2274 | void _rib_dump (const char * func, |
2275 | union prefix46constptr pp, const struct rib * rib) | |
dc95824a | 2276 | { |
f7bf4153 | 2277 | const struct prefix *p = pp.p; |
fed643f4 | 2278 | char straddr[INET6_ADDRSTRLEN]; |
fa713d9e CF |
2279 | struct nexthop *nexthop, *tnexthop; |
2280 | int recursing; | |
dc95824a | 2281 | |
fed643f4 | 2282 | inet_ntop (p->family, &p->u.prefix, straddr, INET6_ADDRSTRLEN); |
fa713d9e | 2283 | zlog_debug ("%s: dumping RIB entry %p for %s/%d", func, rib, straddr, p->prefixlen); |
dc95824a DO |
2284 | zlog_debug |
2285 | ( | |
7c8ff89e | 2286 | "%s: refcnt == %lu, uptime == %lu, type == %u, instance == %d, table == %d", |
dc95824a DO |
2287 | func, |
2288 | rib->refcnt, | |
d02c56cd | 2289 | (unsigned long) rib->uptime, |
dc95824a | 2290 | rib->type, |
7c8ff89e | 2291 | rib->instance, |
dc95824a DO |
2292 | rib->table |
2293 | ); | |
2294 | zlog_debug | |
2295 | ( | |
2296 | "%s: metric == %u, distance == %u, flags == %u, status == %u", | |
2297 | func, | |
2298 | rib->metric, | |
2299 | rib->distance, | |
2300 | rib->flags, | |
2301 | rib->status | |
2302 | ); | |
2303 | zlog_debug | |
2304 | ( | |
2305 | "%s: nexthop_num == %u, nexthop_active_num == %u, nexthop_fib_num == %u", | |
2306 | func, | |
2307 | rib->nexthop_num, | |
2308 | rib->nexthop_active_num, | |
2309 | rib->nexthop_fib_num | |
2310 | ); | |
fed643f4 | 2311 | |
fa713d9e CF |
2312 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
2313 | { | |
fed643f4 | 2314 | inet_ntop (p->family, &nexthop->gate, straddr, INET6_ADDRSTRLEN); |
fa713d9e CF |
2315 | zlog_debug |
2316 | ( | |
2317 | "%s: %s %s with flags %s%s%s", | |
2318 | func, | |
2319 | (recursing ? " NH" : "NH"), | |
2320 | straddr, | |
2321 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE) ? "ACTIVE " : ""), | |
2322 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB) ? "FIB " : ""), | |
2323 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE) ? "RECURSIVE" : "") | |
2324 | ); | |
2325 | } | |
dc95824a DO |
2326 | zlog_debug ("%s: dump complete", func); |
2327 | } | |
2328 | ||
2329 | /* This is an exported helper to rtm_read() to dump the strange | |
2330 | * RIB entry found by rib_lookup_ipv4_route() | |
2331 | */ | |
2332 | ||
2333 | void rib_lookup_and_dump (struct prefix_ipv4 * p) | |
2334 | { | |
2335 | struct route_table *table; | |
2336 | struct route_node *rn; | |
2337 | struct rib *rib; | |
2338 | char prefix_buf[INET_ADDRSTRLEN]; | |
2339 | ||
2340 | /* Lookup table. */ | |
b72ede27 | 2341 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, VRF_DEFAULT); |
dc95824a DO |
2342 | if (! table) |
2343 | { | |
b72ede27 | 2344 | zlog_err ("%s: zebra_vrf_table() returned NULL", __func__); |
dc95824a DO |
2345 | return; |
2346 | } | |
2347 | ||
2348 | inet_ntop (AF_INET, &p->prefix.s_addr, prefix_buf, INET_ADDRSTRLEN); | |
2349 | /* Scan the RIB table for exactly matching RIB entry. */ | |
2350 | rn = route_node_lookup (table, (struct prefix *) p); | |
2351 | ||
2352 | /* No route for this prefix. */ | |
2353 | if (! rn) | |
2354 | { | |
2355 | zlog_debug ("%s: lookup failed for %s/%d", __func__, prefix_buf, p->prefixlen); | |
2356 | return; | |
2357 | } | |
2358 | ||
2359 | /* Unlock node. */ | |
2360 | route_unlock_node (rn); | |
2361 | ||
2362 | /* let's go */ | |
9fd92e3c | 2363 | RNODE_FOREACH_RIB (rn, rib) |
dc95824a DO |
2364 | { |
2365 | zlog_debug | |
2366 | ( | |
2367 | "%s: rn %p, rib %p: %s, %s", | |
2368 | __func__, | |
2369 | rn, | |
2370 | rib, | |
2371 | (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED) ? "removed" : "NOT removed"), | |
2372 | (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) ? "selected" : "NOT selected") | |
2373 | ); | |
f7bf4153 | 2374 | rib_dump (p, rib); |
dc95824a DO |
2375 | } |
2376 | } | |
2377 | ||
20e5ff0a DO |
2378 | /* Check if requested address assignment will fail due to another |
2379 | * route being installed by zebra in FIB already. Take necessary | |
2380 | * actions, if needed: remove such a route from FIB and deSELECT | |
2381 | * corresponding RIB entry. Then put affected RN into RIBQ head. | |
2382 | */ | |
2383 | void rib_lookup_and_pushup (struct prefix_ipv4 * p) | |
2384 | { | |
2385 | struct route_table *table; | |
2386 | struct route_node *rn; | |
2387 | struct rib *rib; | |
2388 | unsigned changed = 0; | |
2389 | ||
b72ede27 | 2390 | if (NULL == (table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, VRF_DEFAULT))) |
20e5ff0a | 2391 | { |
b72ede27 | 2392 | zlog_err ("%s: zebra_vrf_table() returned NULL", __func__); |
20e5ff0a DO |
2393 | return; |
2394 | } | |
2395 | ||
2396 | /* No matches would be the simplest case. */ | |
2397 | if (NULL == (rn = route_node_lookup (table, (struct prefix *) p))) | |
2398 | return; | |
2399 | ||
2400 | /* Unlock node. */ | |
2401 | route_unlock_node (rn); | |
2402 | ||
2403 | /* Check all RIB entries. In case any changes have to be done, requeue | |
2404 | * the RN into RIBQ head. If the routing message about the new connected | |
2405 | * route (generated by the IP address we are going to assign very soon) | |
2406 | * comes before the RIBQ is processed, the new RIB entry will join | |
2407 | * RIBQ record already on head. This is necessary for proper revalidation | |
2408 | * of the rest of the RIB. | |
2409 | */ | |
9fd92e3c | 2410 | RNODE_FOREACH_RIB (rn, rib) |
20e5ff0a DO |
2411 | { |
2412 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) && | |
2413 | ! RIB_SYSTEM_ROUTE (rib)) | |
2414 | { | |
2415 | changed = 1; | |
2416 | if (IS_ZEBRA_DEBUG_RIB) | |
2417 | { | |
2418 | char buf[INET_ADDRSTRLEN]; | |
2419 | inet_ntop (rn->p.family, &p->prefix, buf, INET_ADDRSTRLEN); | |
2420 | zlog_debug ("%s: freeing way for connected prefix %s/%d", __func__, buf, p->prefixlen); | |
f7bf4153 | 2421 | rib_dump (&rn->p, rib); |
20e5ff0a DO |
2422 | } |
2423 | rib_uninstall (rn, rib); | |
2424 | } | |
2425 | } | |
2426 | if (changed) | |
20e5ff0a | 2427 | rib_queue_add (&zebrad, rn); |
20e5ff0a DO |
2428 | } |
2429 | ||
718e3744 | 2430 | int |
cddf391b | 2431 | rib_add_ipv4_multipath (struct prefix_ipv4 *p, struct rib *rib, safi_t safi) |
718e3744 | 2432 | { |
2433 | struct route_table *table; | |
2434 | struct route_node *rn; | |
2435 | struct rib *same; | |
2436 | struct nexthop *nexthop; | |
04b02fda | 2437 | int ret = 0; |
4d38fdb4 | 2438 | |
718e3744 | 2439 | /* Lookup table. */ |
7a4bb9c5 DS |
2440 | if ((rib->table == zebrad.rtm_table_default) || (rib->table == RT_TABLE_MAIN)) |
2441 | { | |
b72ede27 | 2442 | table = zebra_vrf_table (AFI_IP, safi, VRF_DEFAULT); |
7a4bb9c5 DS |
2443 | } |
2444 | else | |
2445 | { | |
b72ede27 | 2446 | table = zebra_vrf_other_route_table (AFI_IP, rib->table, VRF_DEFAULT); |
7a4bb9c5 | 2447 | } |
718e3744 | 2448 | if (! table) |
2449 | return 0; | |
cddf391b | 2450 | |
718e3744 | 2451 | /* Make it sure prefixlen is applied to the prefix. */ |
2452 | apply_mask_ipv4 (p); | |
2453 | ||
2454 | /* Set default distance by route type. */ | |
2455 | if (rib->distance == 0) | |
2456 | { | |
2457 | rib->distance = route_info[rib->type].distance; | |
2458 | ||
2459 | /* iBGP distance is 200. */ | |
2460 | if (rib->type == ZEBRA_ROUTE_BGP | |
2461 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
2462 | rib->distance = 200; | |
2463 | } | |
2464 | ||
2465 | /* Lookup route node.*/ | |
2466 | rn = route_node_get (table, (struct prefix *) p); | |
2467 | ||
2468 | /* If same type of route are installed, treat it as a implicit | |
2469 | withdraw. */ | |
9fd92e3c | 2470 | RNODE_FOREACH_RIB (rn, same) |
718e3744 | 2471 | { |
0b8c4f1d | 2472 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) |
6d691129 PJ |
2473 | continue; |
2474 | ||
7c8ff89e DS |
2475 | if (same->type == rib->type && same->instance == rib->instance |
2476 | && same->table == rib->table | |
718e3744 | 2477 | && same->type != ZEBRA_ROUTE_CONNECT) |
4d38fdb4 | 2478 | break; |
718e3744 | 2479 | } |
4d38fdb4 | 2480 | |
718e3744 | 2481 | /* If this route is kernel route, set FIB flag to the route. */ |
2482 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) | |
2483 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2484 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2485 | ||
2486 | /* Link new rib to node.*/ | |
2487 | rib_addnode (rn, rib); | |
04b02fda | 2488 | ret = 1; |
dc95824a DO |
2489 | if (IS_ZEBRA_DEBUG_RIB) |
2490 | { | |
2491 | zlog_debug ("%s: called rib_addnode (%p, %p) on new RIB entry", | |
2492 | __func__, rn, rib); | |
f7bf4153 | 2493 | rib_dump (p, rib); |
dc95824a | 2494 | } |
718e3744 | 2495 | |
718e3744 | 2496 | /* Free implicit route.*/ |
2497 | if (same) | |
dc95824a DO |
2498 | { |
2499 | if (IS_ZEBRA_DEBUG_RIB) | |
2500 | { | |
2501 | zlog_debug ("%s: calling rib_delnode (%p, %p) on existing RIB entry", | |
2502 | __func__, rn, same); | |
f7bf4153 | 2503 | rib_dump (p, same); |
dc95824a | 2504 | } |
4d38fdb4 | 2505 | rib_delnode (rn, same); |
04b02fda | 2506 | ret = -1; |
dc95824a | 2507 | } |
4d38fdb4 | 2508 | |
2509 | route_unlock_node (rn); | |
04b02fda | 2510 | return ret; |
718e3744 | 2511 | } |
2512 | ||
ebf1ead0 | 2513 | /* XXX factor with rib_delete_ipv6 */ |
718e3744 | 2514 | int |
7c8ff89e | 2515 | rib_delete_ipv4 (int type, u_short instance, int flags, struct prefix_ipv4 *p, |
7a4bb9c5 DS |
2516 | struct in_addr *gate, unsigned int ifindex, |
2517 | u_int32_t table_id, safi_t safi) | |
718e3744 | 2518 | { |
2519 | struct route_table *table; | |
2520 | struct route_node *rn; | |
2521 | struct rib *rib; | |
2522 | struct rib *fib = NULL; | |
2523 | struct rib *same = NULL; | |
fa713d9e CF |
2524 | struct nexthop *nexthop, *tnexthop; |
2525 | int recursing; | |
81cce018 SH |
2526 | char buf1[INET_ADDRSTRLEN]; |
2527 | char buf2[INET_ADDRSTRLEN]; | |
718e3744 | 2528 | |
2529 | /* Lookup table. */ | |
7a4bb9c5 DS |
2530 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) |
2531 | { | |
b72ede27 | 2532 | table = zebra_vrf_table (AFI_IP, safi, VRF_DEFAULT); |
7a4bb9c5 DS |
2533 | } |
2534 | else | |
2535 | { | |
b72ede27 | 2536 | table = zebra_vrf_other_route_table(AFI_IP, table_id, VRF_DEFAULT); |
7a4bb9c5 | 2537 | } |
718e3744 | 2538 | if (! table) |
2539 | return 0; | |
2540 | ||
2541 | /* Apply mask. */ | |
2542 | apply_mask_ipv4 (p); | |
2543 | ||
b52aef18 CF |
2544 | if (IS_ZEBRA_DEBUG_KERNEL) |
2545 | { | |
2546 | if (gate) | |
2547 | zlog_debug ("rib_delete_ipv4(): route delete %s/%d via %s ifindex %d", | |
2548 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), | |
2549 | p->prefixlen, | |
2550 | inet_ntoa (*gate), | |
2551 | ifindex); | |
2552 | else | |
2553 | zlog_debug ("rib_delete_ipv4(): route delete %s/%d ifindex %d", | |
2554 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), | |
2555 | p->prefixlen, | |
2556 | ifindex); | |
2557 | } | |
5ec90d28 | 2558 | |
718e3744 | 2559 | /* Lookup route node. */ |
2560 | rn = route_node_lookup (table, (struct prefix *) p); | |
2561 | if (! rn) | |
2562 | { | |
2563 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2564 | { | |
2565 | if (gate) | |
b6178002 | 2566 | zlog_debug ("route %s/%d via %s ifindex %d doesn't exist in rib", |
81cce018 | 2567 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2568 | p->prefixlen, |
81cce018 | 2569 | inet_ntop (AF_INET, gate, buf2, INET_ADDRSTRLEN), |
718e3744 | 2570 | ifindex); |
2571 | else | |
b6178002 | 2572 | zlog_debug ("route %s/%d ifindex %d doesn't exist in rib", |
81cce018 | 2573 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2574 | p->prefixlen, |
2575 | ifindex); | |
2576 | } | |
2577 | return ZEBRA_ERR_RTNOEXIST; | |
2578 | } | |
2579 | ||
2580 | /* Lookup same type route. */ | |
9fd92e3c | 2581 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2582 | { |
6d691129 PJ |
2583 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2584 | continue; | |
2585 | ||
718e3744 | 2586 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
2587 | fib = rib; | |
2588 | ||
ebf1ead0 | 2589 | if (rib->type != type) |
2590 | continue; | |
7c8ff89e DS |
2591 | if (rib->instance != instance) |
2592 | continue; | |
ebf1ead0 | 2593 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && |
4f1735fd | 2594 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 2595 | { |
4f1735fd MF |
2596 | if (nexthop->ifindex != ifindex) |
2597 | continue; | |
ebf1ead0 | 2598 | if (rib->refcnt) |
718e3744 | 2599 | { |
ebf1ead0 | 2600 | rib->refcnt--; |
2601 | route_unlock_node (rn); | |
2602 | route_unlock_node (rn); | |
2603 | return 0; | |
718e3744 | 2604 | } |
ebf1ead0 | 2605 | same = rib; |
2606 | break; | |
718e3744 | 2607 | } |
ebf1ead0 | 2608 | /* Make sure that the route found has the same gateway. */ |
fa713d9e | 2609 | else |
5ec90d28 | 2610 | { |
fa713d9e CF |
2611 | if (gate == NULL) |
2612 | { | |
2613 | same = rib; | |
2614 | break; | |
2615 | } | |
2616 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
2617 | if (IPV4_ADDR_SAME (&nexthop->gate.ipv4, gate)) | |
2618 | { | |
2619 | same = rib; | |
2620 | break; | |
2621 | } | |
2622 | if (same) | |
2623 | break; | |
2624 | } | |
718e3744 | 2625 | } |
718e3744 | 2626 | /* If same type of route can't be found and this message is from |
2627 | kernel. */ | |
2628 | if (! same) | |
2629 | { | |
2037f143 DS |
2630 | if (fib && type == ZEBRA_ROUTE_KERNEL && |
2631 | CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) | |
2632 | { | |
2633 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2634 | { | |
2635 | zlog_debug ("Zebra route %s/%d was deleted by others from kernel", | |
2636 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), | |
2637 | p->prefixlen); | |
2638 | } | |
6baf7bb8 DS |
2639 | if (allow_delete) |
2640 | { | |
2641 | /* Unset flags. */ | |
2642 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
2643 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2644 | ||
2645 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
2646 | } | |
2647 | else | |
2648 | { | |
2649 | /* This means someone else, other than Zebra, has deleted | |
2650 | * a Zebra router from the kernel. We will add it back */ | |
2651 | rib_install_kernel(rn, fib, 0); | |
2652 | } | |
2037f143 | 2653 | } |
718e3744 | 2654 | else |
2655 | { | |
2656 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2657 | { | |
2658 | if (gate) | |
b6178002 | 2659 | zlog_debug ("route %s/%d via %s ifindex %d type %d doesn't exist in rib", |
81cce018 | 2660 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2661 | p->prefixlen, |
81cce018 | 2662 | inet_ntop (AF_INET, gate, buf2, INET_ADDRSTRLEN), |
718e3744 | 2663 | ifindex, |
2664 | type); | |
2665 | else | |
b6178002 | 2666 | zlog_debug ("route %s/%d ifindex %d type %d doesn't exist in rib", |
81cce018 | 2667 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2668 | p->prefixlen, |
2669 | ifindex, | |
2670 | type); | |
2671 | } | |
2672 | route_unlock_node (rn); | |
2673 | return ZEBRA_ERR_RTNOEXIST; | |
2674 | } | |
2675 | } | |
4d38fdb4 | 2676 | |
718e3744 | 2677 | if (same) |
4d38fdb4 | 2678 | rib_delnode (rn, same); |
2679 | ||
718e3744 | 2680 | route_unlock_node (rn); |
718e3744 | 2681 | return 0; |
2682 | } | |
6b0655a2 | 2683 | |
718e3744 | 2684 | /* Install static route into rib. */ |
a1ac18c4 | 2685 | static void |
718e3744 | 2686 | static_install_ipv4 (struct prefix *p, struct static_ipv4 *si) |
2687 | { | |
2688 | struct rib *rib; | |
2689 | struct route_node *rn; | |
2690 | struct route_table *table; | |
6e26278c | 2691 | struct prefix nh_p; |
718e3744 | 2692 | |
2693 | /* Lookup table. */ | |
b72ede27 | 2694 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, VRF_DEFAULT); |
718e3744 | 2695 | if (! table) |
2696 | return; | |
2697 | ||
2698 | /* Lookup existing route */ | |
2699 | rn = route_node_get (table, p); | |
9fd92e3c | 2700 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
2701 | { |
2702 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2703 | continue; | |
2704 | ||
2705 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
2706 | break; | |
2707 | } | |
718e3744 | 2708 | |
2709 | if (rib) | |
2710 | { | |
0d9551dc DS |
2711 | /* if tag value changed , update old value in RIB */ |
2712 | if (rib->tag != si->tag) | |
2713 | rib->tag = si->tag; | |
2714 | ||
718e3744 | 2715 | /* Same distance static route is there. Update it with new |
2716 | nexthop. */ | |
718e3744 | 2717 | route_unlock_node (rn); |
718e3744 | 2718 | switch (si->type) |
7021c425 | 2719 | { |
2720 | case STATIC_IPV4_GATEWAY: | |
7514fb77 | 2721 | nexthop_ipv4_add (rib, &si->gate.ipv4, NULL); |
6e26278c DS |
2722 | nh_p.family = AF_INET; |
2723 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
2724 | nh_p.u.prefix4 = si->gate.ipv4; | |
2725 | zebra_register_rnh_static_nh(&nh_p, rn); | |
7021c425 | 2726 | break; |
2727 | case STATIC_IPV4_IFNAME: | |
2728 | nexthop_ifname_add (rib, si->gate.ifname); | |
2729 | break; | |
2730 | case STATIC_IPV4_BLACKHOLE: | |
2731 | nexthop_blackhole_add (rib); | |
2732 | break; | |
4d38fdb4 | 2733 | } |
3c0755dc | 2734 | rib_queue_add (&zebrad, rn); |
718e3744 | 2735 | } |
2736 | else | |
2737 | { | |
2738 | /* This is new static route. */ | |
4d38fdb4 | 2739 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
2740 | ||
718e3744 | 2741 | rib->type = ZEBRA_ROUTE_STATIC; |
7c8ff89e | 2742 | rib->instance = 0; |
718e3744 | 2743 | rib->distance = si->distance; |
2744 | rib->metric = 0; | |
b0145ddb | 2745 | rib->table = zebrad.rtm_table_default; |
718e3744 | 2746 | rib->nexthop_num = 0; |
0d9551dc | 2747 | rib->tag = si->tag; |
718e3744 | 2748 | |
2749 | switch (si->type) | |
7021c425 | 2750 | { |
2751 | case STATIC_IPV4_GATEWAY: | |
7514fb77 | 2752 | nexthop_ipv4_add (rib, &si->gate.ipv4, NULL); |
6e26278c DS |
2753 | nh_p.family = AF_INET; |
2754 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
2755 | nh_p.u.prefix4 = si->gate.ipv4; | |
2756 | zebra_register_rnh_static_nh(&nh_p, rn); | |
7021c425 | 2757 | break; |
2758 | case STATIC_IPV4_IFNAME: | |
2759 | nexthop_ifname_add (rib, si->gate.ifname); | |
2760 | break; | |
2761 | case STATIC_IPV4_BLACKHOLE: | |
2762 | nexthop_blackhole_add (rib); | |
2763 | break; | |
2764 | } | |
718e3744 | 2765 | |
81dfcaa2 | 2766 | /* Save the flags of this static routes (reject, blackhole) */ |
2767 | rib->flags = si->flags; | |
2768 | ||
718e3744 | 2769 | /* Link this rib to the tree. */ |
2770 | rib_addnode (rn, rib); | |
718e3744 | 2771 | } |
2772 | } | |
2773 | ||
a1ac18c4 | 2774 | static int |
718e3744 | 2775 | static_ipv4_nexthop_same (struct nexthop *nexthop, struct static_ipv4 *si) |
2776 | { | |
2777 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
2778 | && si->type == STATIC_IPV4_GATEWAY | |
2779 | && IPV4_ADDR_SAME (&nexthop->gate.ipv4, &si->gate.ipv4)) | |
2780 | return 1; | |
2781 | if (nexthop->type == NEXTHOP_TYPE_IFNAME | |
2782 | && si->type == STATIC_IPV4_IFNAME | |
2783 | && strcmp (nexthop->ifname, si->gate.ifname) == 0) | |
2784 | return 1; | |
595db7f1 | 2785 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE |
2786 | && si->type == STATIC_IPV4_BLACKHOLE) | |
2787 | return 1; | |
e8e1946e | 2788 | return 0; |
718e3744 | 2789 | } |
2790 | ||
2791 | /* Uninstall static route from RIB. */ | |
a1ac18c4 | 2792 | static void |
718e3744 | 2793 | static_uninstall_ipv4 (struct prefix *p, struct static_ipv4 *si) |
2794 | { | |
2795 | struct route_node *rn; | |
2796 | struct rib *rib; | |
2797 | struct nexthop *nexthop; | |
2798 | struct route_table *table; | |
6e26278c | 2799 | struct prefix nh_p; |
718e3744 | 2800 | |
2801 | /* Lookup table. */ | |
b72ede27 | 2802 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, VRF_DEFAULT); |
718e3744 | 2803 | if (! table) |
2804 | return; | |
4d38fdb4 | 2805 | |
718e3744 | 2806 | /* Lookup existing route with type and distance. */ |
2807 | rn = route_node_lookup (table, p); | |
2808 | if (! rn) | |
2809 | return; | |
2810 | ||
9fd92e3c | 2811 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
2812 | { |
2813 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2814 | continue; | |
2815 | ||
0d9551dc DS |
2816 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance && |
2817 | rib->tag == si->tag) | |
6d691129 PJ |
2818 | break; |
2819 | } | |
718e3744 | 2820 | |
2821 | if (! rib) | |
2822 | { | |
2823 | route_unlock_node (rn); | |
2824 | return; | |
2825 | } | |
2826 | ||
2827 | /* Lookup nexthop. */ | |
2828 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2829 | if (static_ipv4_nexthop_same (nexthop, si)) | |
2830 | break; | |
2831 | ||
2832 | /* Can't find nexthop. */ | |
2833 | if (! nexthop) | |
2834 | { | |
2835 | route_unlock_node (rn); | |
2836 | return; | |
2837 | } | |
2838 | ||
2839 | /* Check nexthop. */ | |
2840 | if (rib->nexthop_num == 1) | |
6d691129 | 2841 | rib_delnode (rn, rib); |
718e3744 | 2842 | else |
2843 | { | |
94ad353d DS |
2844 | /* Mark this nexthop as inactive and reinstall the route. Then, delete |
2845 | * the nexthop. There is no need to re-evaluate the route for this | |
2846 | * scenario. | |
2847 | */ | |
2848 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
6baeb988 | 2849 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
94ad353d | 2850 | { |
6ae24471 | 2851 | /* If there are other active nexthops, do an update. */ |
94ad353d DS |
2852 | if (rib->nexthop_active_num > 1) |
2853 | { | |
6ae24471 | 2854 | rib_install_kernel (rn, rib, 1); |
c41fc67b | 2855 | redistribute_update (&rn->p, rib, NULL); |
94ad353d | 2856 | } |
6ae24471 | 2857 | else |
5048fe14 | 2858 | { |
2859 | redistribute_delete (&rn->p, rib); | |
2860 | rib_uninstall_kernel (rn, rib); | |
2861 | } | |
94ad353d | 2862 | } |
6e26278c | 2863 | |
94ad353d | 2864 | /* Delete the nexthop and dereg from NHT */ |
6e26278c DS |
2865 | nh_p.family = AF_INET; |
2866 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
2867 | nh_p.u.prefix4 = nexthop->gate.ipv4; | |
319572cc | 2868 | nexthop_delete (rib, nexthop); |
6e26278c DS |
2869 | zebra_deregister_rnh_static_nh(&nh_p, rn); |
2870 | nexthop_free (nexthop, rn); | |
718e3744 | 2871 | } |
718e3744 | 2872 | /* Unlock node. */ |
2873 | route_unlock_node (rn); | |
2874 | } | |
2875 | ||
2876 | /* Add static route into static route configuration. */ | |
2877 | int | |
39db97e4 | 2878 | static_add_ipv4 (struct prefix *p, struct in_addr *gate, const char *ifname, |
0d9551dc | 2879 | u_char flags, u_short tag, u_char distance, u_int32_t vrf_id) |
718e3744 | 2880 | { |
2881 | u_char type = 0; | |
2882 | struct route_node *rn; | |
2883 | struct static_ipv4 *si; | |
2884 | struct static_ipv4 *pp; | |
2885 | struct static_ipv4 *cp; | |
2886 | struct static_ipv4 *update = NULL; | |
2887 | struct route_table *stable; | |
2888 | ||
2889 | /* Lookup table. */ | |
b72ede27 | 2890 | stable = zebra_vrf_static_table (AFI_IP, SAFI_UNICAST, vrf_id); |
718e3744 | 2891 | if (! stable) |
2892 | return -1; | |
2893 | ||
2894 | /* Lookup static route prefix. */ | |
2895 | rn = route_node_get (stable, p); | |
2896 | ||
2897 | /* Make flags. */ | |
2898 | if (gate) | |
2899 | type = STATIC_IPV4_GATEWAY; | |
368aa3f0 | 2900 | else if (ifname) |
718e3744 | 2901 | type = STATIC_IPV4_IFNAME; |
595db7f1 | 2902 | else |
2903 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 2904 | |
2905 | /* Do nothing if there is a same static route. */ | |
2906 | for (si = rn->info; si; si = si->next) | |
2907 | { | |
2908 | if (type == si->type | |
2909 | && (! gate || IPV4_ADDR_SAME (gate, &si->gate.ipv4)) | |
2910 | && (! ifname || strcmp (ifname, si->gate.ifname) == 0)) | |
2911 | { | |
0d9551dc | 2912 | if ((distance == si->distance) && (tag == si->tag)) |
718e3744 | 2913 | { |
2914 | route_unlock_node (rn); | |
2915 | return 0; | |
2916 | } | |
2917 | else | |
2918 | update = si; | |
2919 | } | |
2920 | } | |
2921 | ||
0d9551dc | 2922 | /* Distance or tag changed. */ |
718e3744 | 2923 | if (update) |
0d9551dc | 2924 | static_delete_ipv4 (p, gate, ifname, update->tag, update->distance, vrf_id); |
718e3744 | 2925 | |
2926 | /* Make new static route structure. */ | |
393deb9b | 2927 | si = XCALLOC (MTYPE_STATIC_IPV4, sizeof (struct static_ipv4)); |
718e3744 | 2928 | |
2929 | si->type = type; | |
2930 | si->distance = distance; | |
81dfcaa2 | 2931 | si->flags = flags; |
0d9551dc | 2932 | si->tag = tag; |
718e3744 | 2933 | |
2934 | if (gate) | |
2935 | si->gate.ipv4 = *gate; | |
2936 | if (ifname) | |
2937 | si->gate.ifname = XSTRDUP (0, ifname); | |
2938 | ||
2939 | /* Add new static route information to the tree with sort by | |
2940 | distance value and gateway address. */ | |
2941 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
2942 | { | |
2943 | if (si->distance < cp->distance) | |
2944 | break; | |
2945 | if (si->distance > cp->distance) | |
2946 | continue; | |
2947 | if (si->type == STATIC_IPV4_GATEWAY && cp->type == STATIC_IPV4_GATEWAY) | |
2948 | { | |
2949 | if (ntohl (si->gate.ipv4.s_addr) < ntohl (cp->gate.ipv4.s_addr)) | |
2950 | break; | |
2951 | if (ntohl (si->gate.ipv4.s_addr) > ntohl (cp->gate.ipv4.s_addr)) | |
2952 | continue; | |
2953 | } | |
2954 | } | |
2955 | ||
2956 | /* Make linked list. */ | |
2957 | if (pp) | |
2958 | pp->next = si; | |
2959 | else | |
2960 | rn->info = si; | |
2961 | if (cp) | |
2962 | cp->prev = si; | |
2963 | si->prev = pp; | |
2964 | si->next = cp; | |
2965 | ||
2966 | /* Install into rib. */ | |
2967 | static_install_ipv4 (p, si); | |
2968 | ||
2969 | return 1; | |
2970 | } | |
2971 | ||
2972 | /* Delete static route from static route configuration. */ | |
2973 | int | |
39db97e4 | 2974 | static_delete_ipv4 (struct prefix *p, struct in_addr *gate, const char *ifname, |
0d9551dc | 2975 | u_short tag, u_char distance, u_int32_t vrf_id) |
718e3744 | 2976 | { |
2977 | u_char type = 0; | |
2978 | struct route_node *rn; | |
2979 | struct static_ipv4 *si; | |
2980 | struct route_table *stable; | |
2981 | ||
2982 | /* Lookup table. */ | |
b72ede27 | 2983 | stable = zebra_vrf_static_table (AFI_IP, SAFI_UNICAST, vrf_id); |
718e3744 | 2984 | if (! stable) |
2985 | return -1; | |
2986 | ||
2987 | /* Lookup static route prefix. */ | |
2988 | rn = route_node_lookup (stable, p); | |
2989 | if (! rn) | |
2990 | return 0; | |
2991 | ||
2992 | /* Make flags. */ | |
2993 | if (gate) | |
2994 | type = STATIC_IPV4_GATEWAY; | |
2995 | else if (ifname) | |
2996 | type = STATIC_IPV4_IFNAME; | |
595db7f1 | 2997 | else |
2998 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 2999 | |
3000 | /* Find same static route is the tree */ | |
3001 | for (si = rn->info; si; si = si->next) | |
3002 | if (type == si->type | |
3003 | && (! gate || IPV4_ADDR_SAME (gate, &si->gate.ipv4)) | |
0d9551dc DS |
3004 | && (! ifname || strcmp (ifname, si->gate.ifname) == 0) |
3005 | && (! tag || (tag == si->tag))) | |
718e3744 | 3006 | break; |
3007 | ||
3008 | /* Can't find static route. */ | |
3009 | if (! si) | |
3010 | { | |
3011 | route_unlock_node (rn); | |
3012 | return 0; | |
3013 | } | |
3014 | ||
3015 | /* Install into rib. */ | |
3016 | static_uninstall_ipv4 (p, si); | |
3017 | ||
3018 | /* Unlink static route from linked list. */ | |
3019 | if (si->prev) | |
3020 | si->prev->next = si->next; | |
3021 | else | |
3022 | rn->info = si->next; | |
3023 | if (si->next) | |
3024 | si->next->prev = si->prev; | |
143a385f | 3025 | route_unlock_node (rn); |
718e3744 | 3026 | |
3027 | /* Free static route configuration. */ | |
a0f6acd8 | 3028 | if (ifname) |
3029 | XFREE (0, si->gate.ifname); | |
718e3744 | 3030 | XFREE (MTYPE_STATIC_IPV4, si); |
3031 | ||
143a385f | 3032 | route_unlock_node (rn); |
3033 | ||
718e3744 | 3034 | return 1; |
3035 | } | |
3036 | ||
6b0655a2 | 3037 | |
718e3744 | 3038 | #ifdef HAVE_IPV6 |
41fc2714 | 3039 | int |
718e3744 | 3040 | rib_bogus_ipv6 (int type, struct prefix_ipv6 *p, |
3041 | struct in6_addr *gate, unsigned int ifindex, int table) | |
3042 | { | |
726f9b2b | 3043 | if (type == ZEBRA_ROUTE_CONNECT && IN6_IS_ADDR_UNSPECIFIED (&p->prefix)) { |
3044 | #if defined (MUSICA) || defined (LINUX) | |
3045 | /* IN6_IS_ADDR_V4COMPAT(&p->prefix) */ | |
3046 | if (p->prefixlen == 96) | |
3047 | return 0; | |
3048 | #endif /* MUSICA */ | |
718e3744 | 3049 | return 1; |
726f9b2b | 3050 | } |
718e3744 | 3051 | if (type == ZEBRA_ROUTE_KERNEL && IN6_IS_ADDR_UNSPECIFIED (&p->prefix) |
3052 | && p->prefixlen == 96 && gate && IN6_IS_ADDR_UNSPECIFIED (gate)) | |
3053 | { | |
3054 | kernel_delete_ipv6_old (p, gate, ifindex, 0, table); | |
3055 | return 1; | |
3056 | } | |
3057 | return 0; | |
3058 | } | |
3059 | ||
3060 | int | |
7c8ff89e | 3061 | rib_add_ipv6 (int type, u_short instance, int flags, struct prefix_ipv6 *p, |
7a4bb9c5 | 3062 | struct in6_addr *gate, unsigned int ifindex, u_int32_t table_id, |
f768f367 | 3063 | u_int32_t metric, u_char distance, safi_t safi) |
718e3744 | 3064 | { |
3065 | struct rib *rib; | |
3066 | struct rib *same = NULL; | |
3067 | struct route_table *table; | |
3068 | struct route_node *rn; | |
3069 | struct nexthop *nexthop; | |
3070 | ||
718e3744 | 3071 | /* Lookup table. */ |
7a4bb9c5 DS |
3072 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) |
3073 | { | |
b72ede27 | 3074 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT); |
7a4bb9c5 DS |
3075 | } |
3076 | else | |
3077 | { | |
b72ede27 | 3078 | table = zebra_vrf_other_route_table(AFI_IP6, table_id, VRF_DEFAULT); |
7a4bb9c5 | 3079 | } |
718e3744 | 3080 | if (! table) |
3081 | return 0; | |
3082 | ||
3083 | /* Make sure mask is applied. */ | |
3084 | apply_mask_ipv6 (p); | |
3085 | ||
3086 | /* Set default distance by route type. */ | |
be61c4eb | 3087 | if (!distance) |
3088 | distance = route_info[type].distance; | |
718e3744 | 3089 | |
3090 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
3091 | distance = 200; | |
3092 | ||
3093 | /* Filter bogus route. */ | |
3094 | if (rib_bogus_ipv6 (type, p, gate, ifindex, 0)) | |
3095 | return 0; | |
3096 | ||
3097 | /* Lookup route node.*/ | |
3098 | rn = route_node_get (table, (struct prefix *) p); | |
3099 | ||
3100 | /* If same type of route are installed, treat it as a implicit | |
3101 | withdraw. */ | |
9fd92e3c | 3102 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 3103 | { |
6d691129 PJ |
3104 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3105 | continue; | |
3106 | ||
ebf1ead0 | 3107 | if (rib->type != type) |
3108 | continue; | |
7c8ff89e DS |
3109 | if (rib->instance != instance) |
3110 | continue; | |
ebf1ead0 | 3111 | if (rib->type != ZEBRA_ROUTE_CONNECT) |
718e3744 | 3112 | { |
3113 | same = rib; | |
718e3744 | 3114 | break; |
3115 | } | |
ebf1ead0 | 3116 | else if ((nexthop = rib->nexthop) && |
3117 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
3118 | nexthop->ifindex == ifindex) | |
3119 | { | |
3120 | rib->refcnt++; | |
3121 | return 0; | |
3122 | } | |
718e3744 | 3123 | } |
3124 | ||
3125 | /* Allocate new rib structure. */ | |
4d38fdb4 | 3126 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
3127 | ||
718e3744 | 3128 | rib->type = type; |
7c8ff89e | 3129 | rib->instance = instance; |
718e3744 | 3130 | rib->distance = distance; |
3131 | rib->flags = flags; | |
3132 | rib->metric = metric; | |
7a4bb9c5 | 3133 | rib->table = table_id; |
718e3744 | 3134 | rib->nexthop_num = 0; |
3135 | rib->uptime = time (NULL); | |
3136 | ||
3137 | /* Nexthop settings. */ | |
3138 | if (gate) | |
3139 | { | |
3140 | if (ifindex) | |
3141 | nexthop_ipv6_ifindex_add (rib, gate, ifindex); | |
3142 | else | |
3143 | nexthop_ipv6_add (rib, gate); | |
3144 | } | |
3145 | else | |
3146 | nexthop_ifindex_add (rib, ifindex); | |
3147 | ||
3148 | /* If this route is kernel route, set FIB flag to the route. */ | |
3149 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
3150 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
3151 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
3152 | ||
3153 | /* Link new rib to node.*/ | |
3154 | rib_addnode (rn, rib); | |
fed643f4 VB |
3155 | if (IS_ZEBRA_DEBUG_RIB) |
3156 | { | |
3157 | zlog_debug ("%s: called rib_addnode (%p, %p) on new RIB entry", | |
3158 | __func__, rn, rib); | |
f7bf4153 | 3159 | rib_dump (p, rib); |
fed643f4 | 3160 | } |
718e3744 | 3161 | |
718e3744 | 3162 | /* Free implicit route.*/ |
3163 | if (same) | |
fed643f4 VB |
3164 | { |
3165 | if (IS_ZEBRA_DEBUG_RIB) | |
3166 | { | |
3167 | zlog_debug ("%s: calling rib_delnode (%p, %p) on existing RIB entry", | |
3168 | __func__, rn, same); | |
f7bf4153 | 3169 | rib_dump (p, same); |
fed643f4 | 3170 | } |
4d38fdb4 | 3171 | rib_delnode (rn, same); |
fed643f4 | 3172 | } |
4d38fdb4 | 3173 | |
3174 | route_unlock_node (rn); | |
718e3744 | 3175 | return 0; |
3176 | } | |
3177 | ||
41fc2714 | 3178 | int |
8a92a8a0 | 3179 | rib_add_ipv6_multipath (struct prefix *p, struct rib *rib, safi_t safi, |
41fc2714 DS |
3180 | unsigned long ifindex) |
3181 | { | |
3182 | struct route_table *table; | |
3183 | struct route_node *rn; | |
3184 | struct rib *same = NULL; | |
3185 | struct nexthop *nexthop; | |
3186 | int ret = 0; | |
4e3afb14 | 3187 | unsigned int table_id = 0; |
41fc2714 | 3188 | |
8a92a8a0 | 3189 | if (p->family == AF_INET) |
7a4bb9c5 | 3190 | { |
8a92a8a0 DS |
3191 | if (!rib) |
3192 | return 0; | |
3193 | ||
b72ede27 | 3194 | table = zebra_vrf_table (AFI_IP, safi, VRF_DEFAULT); |
8a92a8a0 DS |
3195 | if (!table) |
3196 | return 0; | |
3197 | /* Make it sure prefixlen is applied to the prefix. */ | |
88177fe3 | 3198 | apply_mask_ipv4 ((struct prefix_ipv4 *)p); |
7a4bb9c5 DS |
3199 | } |
3200 | else | |
3201 | { | |
8a92a8a0 DS |
3202 | if (rib) |
3203 | table_id = rib->table; | |
3204 | else | |
3205 | return 0; /* why are we getting called with NULL rib */ | |
41fc2714 | 3206 | |
8a92a8a0 DS |
3207 | /* Lookup table. */ |
3208 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) | |
3209 | { | |
b72ede27 | 3210 | table = zebra_vrf_table (AFI_IP6, safi, VRF_DEFAULT); |
8a92a8a0 DS |
3211 | } |
3212 | else | |
3213 | { | |
b72ede27 | 3214 | table = zebra_vrf_other_route_table(AFI_IP6, table_id, VRF_DEFAULT); |
8a92a8a0 | 3215 | } |
41fc2714 | 3216 | |
8a92a8a0 DS |
3217 | if (! table) |
3218 | return 0; | |
3219 | ||
3220 | /* Make sure mask is applied. */ | |
88177fe3 | 3221 | apply_mask_ipv6 ((struct prefix_ipv6 *)p); |
8a92a8a0 DS |
3222 | |
3223 | } | |
41fc2714 DS |
3224 | |
3225 | /* Set default distance by route type. */ | |
3226 | if (rib->distance == 0) | |
3227 | { | |
3228 | rib->distance = route_info[rib->type].distance; | |
3229 | ||
3230 | /* iBGP distance is 200. */ | |
3231 | if (rib->type == ZEBRA_ROUTE_BGP | |
3232 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
3233 | rib->distance = 200; | |
3234 | } | |
3235 | ||
3236 | /* Lookup route node.*/ | |
3237 | rn = route_node_get (table, (struct prefix *) p); | |
3238 | ||
3239 | /* If same type of route are installed, treat it as a implicit | |
3240 | withdraw. */ | |
3241 | RNODE_FOREACH_RIB (rn, same) { | |
3242 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) { | |
3243 | continue; | |
3244 | } | |
3245 | if (same->type != rib->type) { | |
3246 | continue; | |
3247 | } | |
3248 | ||
7c8ff89e DS |
3249 | if (same->instance != rib->instance) { |
3250 | continue; | |
3251 | } | |
3252 | ||
41fc2714 DS |
3253 | if (same->table != rib->table) { |
3254 | continue; | |
3255 | } | |
3256 | if (same->type != ZEBRA_ROUTE_CONNECT) { | |
3257 | break; | |
3258 | } | |
3259 | else if ((nexthop = same->nexthop) && | |
3260 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
3261 | nexthop->ifindex == ifindex) { | |
3262 | same->refcnt++; | |
3263 | return 0; | |
3264 | } | |
3265 | } | |
3266 | ||
3267 | /* If this route is kernel route, set FIB flag to the route. */ | |
3268 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) { | |
3269 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) { | |
3270 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
3271 | } | |
3272 | } | |
3273 | ||
3274 | /* Link new rib to node.*/ | |
3275 | rib_addnode (rn, rib); | |
3276 | ret = 1; | |
3277 | /* Free implicit route.*/ | |
3278 | if (same) | |
3279 | { | |
3280 | if (IS_ZEBRA_DEBUG_RIB) | |
3281 | { | |
3282 | zlog_debug ("%s: calling rib_delnode (%p, %p) on existing RIB entry", | |
3283 | __func__, rn, same); | |
3284 | rib_dump ((struct prefix *)p, same); | |
3285 | } | |
3286 | rib_delnode (rn, same); | |
3287 | ret = -1; | |
3288 | } | |
3289 | ||
3290 | route_unlock_node (rn); | |
3291 | return ret; | |
3292 | } | |
3293 | ||
ebf1ead0 | 3294 | /* XXX factor with rib_delete_ipv6 */ |
718e3744 | 3295 | int |
7c8ff89e | 3296 | rib_delete_ipv6 (int type, u_short instance, int flags, struct prefix_ipv6 *p, |
7a4bb9c5 | 3297 | struct in6_addr *gate, unsigned int ifindex, u_int32_t table_id, safi_t safi) |
718e3744 | 3298 | { |
3299 | struct route_table *table; | |
3300 | struct route_node *rn; | |
3301 | struct rib *rib; | |
3302 | struct rib *fib = NULL; | |
3303 | struct rib *same = NULL; | |
fa713d9e CF |
3304 | struct nexthop *nexthop, *tnexthop; |
3305 | int recursing; | |
81cce018 SH |
3306 | char buf1[INET6_ADDRSTRLEN]; |
3307 | char buf2[INET6_ADDRSTRLEN]; | |
718e3744 | 3308 | |
3309 | /* Apply mask. */ | |
3310 | apply_mask_ipv6 (p); | |
3311 | ||
3312 | /* Lookup table. */ | |
7a4bb9c5 DS |
3313 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) |
3314 | { | |
b72ede27 | 3315 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT); |
7a4bb9c5 DS |
3316 | } |
3317 | else | |
3318 | { | |
b72ede27 | 3319 | table = zebra_vrf_other_route_table(AFI_IP6, table_id, VRF_DEFAULT); |
7a4bb9c5 | 3320 | } |
718e3744 | 3321 | if (! table) |
3322 | return 0; | |
4d38fdb4 | 3323 | |
718e3744 | 3324 | /* Lookup route node. */ |
3325 | rn = route_node_lookup (table, (struct prefix *) p); | |
3326 | if (! rn) | |
3327 | { | |
3328 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3329 | { | |
3330 | if (gate) | |
b6178002 | 3331 | zlog_debug ("route %s/%d via %s ifindex %d doesn't exist in rib", |
81cce018 | 3332 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 3333 | p->prefixlen, |
81cce018 | 3334 | inet_ntop (AF_INET6, gate, buf2, INET6_ADDRSTRLEN), |
718e3744 | 3335 | ifindex); |
3336 | else | |
b6178002 | 3337 | zlog_debug ("route %s/%d ifindex %d doesn't exist in rib", |
81cce018 | 3338 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 3339 | p->prefixlen, |
3340 | ifindex); | |
3341 | } | |
3342 | return ZEBRA_ERR_RTNOEXIST; | |
3343 | } | |
3344 | ||
3345 | /* Lookup same type route. */ | |
9fd92e3c | 3346 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 3347 | { |
6d691129 PJ |
3348 | if (CHECK_FLAG(rib->status, RIB_ENTRY_REMOVED)) |
3349 | continue; | |
3350 | ||
718e3744 | 3351 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
3352 | fib = rib; | |
3353 | ||
ebf1ead0 | 3354 | if (rib->type != type) |
3355 | continue; | |
7c8ff89e DS |
3356 | if (rib->instance != instance) |
3357 | continue; | |
ebf1ead0 | 3358 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && |
4f1735fd | 3359 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 3360 | { |
4f1735fd MF |
3361 | if (nexthop->ifindex != ifindex) |
3362 | continue; | |
ebf1ead0 | 3363 | if (rib->refcnt) |
718e3744 | 3364 | { |
ebf1ead0 | 3365 | rib->refcnt--; |
3366 | route_unlock_node (rn); | |
3367 | route_unlock_node (rn); | |
3368 | return 0; | |
718e3744 | 3369 | } |
ebf1ead0 | 3370 | same = rib; |
3371 | break; | |
718e3744 | 3372 | } |
ebf1ead0 | 3373 | /* Make sure that the route found has the same gateway. */ |
fa713d9e CF |
3374 | else |
3375 | { | |
3376 | if (gate == NULL) | |
3377 | { | |
3378 | same = rib; | |
3379 | break; | |
3380 | } | |
3381 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
3382 | if (IPV6_ADDR_SAME (&nexthop->gate.ipv6, gate)) | |
3383 | { | |
3384 | same = rib; | |
3385 | break; | |
3386 | } | |
3387 | if (same) | |
3388 | break; | |
3389 | } | |
718e3744 | 3390 | } |
3391 | ||
3392 | /* If same type of route can't be found and this message is from | |
3393 | kernel. */ | |
3394 | if (! same) | |
3395 | { | |
2037f143 DS |
3396 | if (fib && type == ZEBRA_ROUTE_KERNEL && |
3397 | CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) | |
3398 | { | |
3399 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3400 | { | |
3401 | zlog_debug ("Zebra route %s/%d was deleted by others from kernel", | |
deee6b32 | 3402 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
2037f143 DS |
3403 | p->prefixlen); |
3404 | } | |
6baf7bb8 DS |
3405 | if (allow_delete) |
3406 | { | |
3407 | /* Unset flags. */ | |
3408 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
3409 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
3410 | ||
3411 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
3412 | } | |
3413 | else | |
3414 | { | |
3415 | /* This means someone else, other than Zebra, has deleted a Zebra | |
3416 | * route from the kernel. We will add it back */ | |
3417 | rib_install_kernel(rn, fib, 0); | |
3418 | } | |
2037f143 | 3419 | } |
718e3744 | 3420 | else |
3421 | { | |
3422 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3423 | { | |
3424 | if (gate) | |
b6178002 | 3425 | zlog_debug ("route %s/%d via %s ifindex %d type %d doesn't exist in rib", |
81cce018 | 3426 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 3427 | p->prefixlen, |
81cce018 | 3428 | inet_ntop (AF_INET6, gate, buf2, INET6_ADDRSTRLEN), |
718e3744 | 3429 | ifindex, |
3430 | type); | |
3431 | else | |
b6178002 | 3432 | zlog_debug ("route %s/%d ifindex %d type %d doesn't exist in rib", |
81cce018 | 3433 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 3434 | p->prefixlen, |
3435 | ifindex, | |
3436 | type); | |
3437 | } | |
3438 | route_unlock_node (rn); | |
3439 | return ZEBRA_ERR_RTNOEXIST; | |
3440 | } | |
3441 | } | |
3442 | ||
718e3744 | 3443 | if (same) |
4d38fdb4 | 3444 | rib_delnode (rn, same); |
3445 | ||
718e3744 | 3446 | route_unlock_node (rn); |
718e3744 | 3447 | return 0; |
3448 | } | |
6b0655a2 | 3449 | |
718e3744 | 3450 | /* Install static route into rib. */ |
a1ac18c4 | 3451 | static void |
718e3744 | 3452 | static_install_ipv6 (struct prefix *p, struct static_ipv6 *si) |
3453 | { | |
3454 | struct rib *rib; | |
3455 | struct route_table *table; | |
3456 | struct route_node *rn; | |
6e26278c | 3457 | struct prefix nh_p; |
718e3744 | 3458 | |
3459 | /* Lookup table. */ | |
b72ede27 | 3460 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT); |
718e3744 | 3461 | if (! table) |
3462 | return; | |
3463 | ||
3464 | /* Lookup existing route */ | |
3465 | rn = route_node_get (table, p); | |
9fd92e3c | 3466 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
3467 | { |
3468 | if (CHECK_FLAG(rib->status, RIB_ENTRY_REMOVED)) | |
3469 | continue; | |
3470 | ||
3471 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
3472 | break; | |
3473 | } | |
718e3744 | 3474 | |
3475 | if (rib) | |
3476 | { | |
0d9551dc DS |
3477 | /* if tag value changed , update old value in RIB */ |
3478 | if (rib->tag != si->tag) | |
3479 | rib->tag = si->tag; | |
3480 | ||
718e3744 | 3481 | /* Same distance static route is there. Update it with new |
3482 | nexthop. */ | |
718e3744 | 3483 | route_unlock_node (rn); |
3484 | ||
3485 | switch (si->type) | |
3486 | { | |
3487 | case STATIC_IPV6_GATEWAY: | |
3488 | nexthop_ipv6_add (rib, &si->ipv6); | |
6e26278c DS |
3489 | nh_p.family = AF_INET6; |
3490 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
3491 | nh_p.u.prefix6 = si->ipv6; | |
3492 | zebra_register_rnh_static_nh(&nh_p, rn); | |
718e3744 | 3493 | break; |
3494 | case STATIC_IPV6_IFNAME: | |
3495 | nexthop_ifname_add (rib, si->ifname); | |
3496 | break; | |
3497 | case STATIC_IPV6_GATEWAY_IFNAME: | |
3498 | nexthop_ipv6_ifname_add (rib, &si->ipv6, si->ifname); | |
3499 | break; | |
3500 | } | |
3c0755dc | 3501 | rib_queue_add (&zebrad, rn); |
718e3744 | 3502 | } |
3503 | else | |
3504 | { | |
3505 | /* This is new static route. */ | |
4d38fdb4 | 3506 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
3507 | ||
718e3744 | 3508 | rib->type = ZEBRA_ROUTE_STATIC; |
7c8ff89e | 3509 | rib->instance = 0; |
718e3744 | 3510 | rib->distance = si->distance; |
3511 | rib->metric = 0; | |
4595531e | 3512 | rib->table = zebrad.rtm_table_default; |
718e3744 | 3513 | rib->nexthop_num = 0; |
0d9551dc | 3514 | rib->tag = si->tag; |
718e3744 | 3515 | |
3516 | switch (si->type) | |
3517 | { | |
3518 | case STATIC_IPV6_GATEWAY: | |
3519 | nexthop_ipv6_add (rib, &si->ipv6); | |
6e26278c DS |
3520 | nh_p.family = AF_INET6; |
3521 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
3522 | nh_p.u.prefix6 = si->ipv6; | |
3523 | zebra_register_rnh_static_nh(&nh_p, rn); | |
718e3744 | 3524 | break; |
3525 | case STATIC_IPV6_IFNAME: | |
3526 | nexthop_ifname_add (rib, si->ifname); | |
3527 | break; | |
3528 | case STATIC_IPV6_GATEWAY_IFNAME: | |
3529 | nexthop_ipv6_ifname_add (rib, &si->ipv6, si->ifname); | |
3530 | break; | |
3531 | } | |
3532 | ||
81dfcaa2 | 3533 | /* Save the flags of this static routes (reject, blackhole) */ |
3534 | rib->flags = si->flags; | |
3535 | ||
718e3744 | 3536 | /* Link this rib to the tree. */ |
3537 | rib_addnode (rn, rib); | |
718e3744 | 3538 | } |
3539 | } | |
3540 | ||
a1ac18c4 | 3541 | static int |
718e3744 | 3542 | static_ipv6_nexthop_same (struct nexthop *nexthop, struct static_ipv6 *si) |
3543 | { | |
3544 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
3545 | && si->type == STATIC_IPV6_GATEWAY | |
3546 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->ipv6)) | |
3547 | return 1; | |
3548 | if (nexthop->type == NEXTHOP_TYPE_IFNAME | |
3549 | && si->type == STATIC_IPV6_IFNAME | |
3550 | && strcmp (nexthop->ifname, si->ifname) == 0) | |
3551 | return 1; | |
3552 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME | |
3553 | && si->type == STATIC_IPV6_GATEWAY_IFNAME | |
3554 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->ipv6) | |
3555 | && strcmp (nexthop->ifname, si->ifname) == 0) | |
3556 | return 1; | |
e8e1946e | 3557 | return 0; |
718e3744 | 3558 | } |
3559 | ||
a1ac18c4 | 3560 | static void |
718e3744 | 3561 | static_uninstall_ipv6 (struct prefix *p, struct static_ipv6 *si) |
3562 | { | |
3563 | struct route_table *table; | |
3564 | struct route_node *rn; | |
3565 | struct rib *rib; | |
3566 | struct nexthop *nexthop; | |
6e26278c | 3567 | struct prefix nh_p; |
718e3744 | 3568 | |
3569 | /* Lookup table. */ | |
b72ede27 | 3570 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT); |
718e3744 | 3571 | if (! table) |
3572 | return; | |
3573 | ||
3574 | /* Lookup existing route with type and distance. */ | |
3575 | rn = route_node_lookup (table, (struct prefix *) p); | |
3576 | if (! rn) | |
3577 | return; | |
3578 | ||
9fd92e3c | 3579 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
3580 | { |
3581 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
3582 | continue; | |
3583 | ||
0d9551dc DS |
3584 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance && |
3585 | rib->tag == si->tag) | |
6d691129 PJ |
3586 | break; |
3587 | } | |
3588 | ||
718e3744 | 3589 | if (! rib) |
3590 | { | |
3591 | route_unlock_node (rn); | |
3592 | return; | |
3593 | } | |
3594 | ||
3595 | /* Lookup nexthop. */ | |
3596 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
3597 | if (static_ipv6_nexthop_same (nexthop, si)) | |
3598 | break; | |
3599 | ||
3600 | /* Can't find nexthop. */ | |
3601 | if (! nexthop) | |
3602 | { | |
3603 | route_unlock_node (rn); | |
3604 | return; | |
3605 | } | |
3606 | ||
3607 | /* Check nexthop. */ | |
3608 | if (rib->nexthop_num == 1) | |
3609 | { | |
3610 | rib_delnode (rn, rib); | |
718e3744 | 3611 | } |
3612 | else | |
3613 | { | |
94ad353d DS |
3614 | /* Mark this nexthop as inactive and reinstall the route. Then, delete |
3615 | * the nexthop. There is no need to re-evaluate the route for this | |
3616 | * scenario. | |
3617 | */ | |
3618 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
6baeb988 | 3619 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
94ad353d DS |
3620 | { |
3621 | redistribute_delete (&rn->p, rib); | |
3622 | rib_uninstall_kernel (rn, rib); | |
3623 | /* Are there other active nexthops? */ | |
3624 | if (rib->nexthop_active_num > 1) | |
3625 | { | |
6ae24471 | 3626 | rib_install_kernel (rn, rib, 0); |
c41fc67b | 3627 | redistribute_update (&rn->p, rib, NULL); |
94ad353d DS |
3628 | } |
3629 | } | |
6e26278c | 3630 | |
94ad353d | 3631 | /* Delete the nexthop and dereg from NHT */ |
6e26278c DS |
3632 | nh_p.family = AF_INET6; |
3633 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
3634 | nh_p.u.prefix6 = nexthop->gate.ipv6; | |
319572cc | 3635 | nexthop_delete (rib, nexthop); |
6e26278c DS |
3636 | zebra_deregister_rnh_static_nh(&nh_p, rn); |
3637 | nexthop_free (nexthop, rn); | |
718e3744 | 3638 | } |
718e3744 | 3639 | /* Unlock node. */ |
3640 | route_unlock_node (rn); | |
3641 | } | |
3642 | ||
3643 | /* Add static route into static route configuration. */ | |
3644 | int | |
3645 | static_add_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
0d9551dc DS |
3646 | const char *ifname, u_char flags, u_short tag, |
3647 | u_char distance, u_int32_t vrf_id) | |
718e3744 | 3648 | { |
3649 | struct route_node *rn; | |
3650 | struct static_ipv6 *si; | |
3651 | struct static_ipv6 *pp; | |
3652 | struct static_ipv6 *cp; | |
3653 | struct route_table *stable; | |
3654 | ||
3655 | /* Lookup table. */ | |
b72ede27 | 3656 | stable = zebra_vrf_static_table (AFI_IP6, SAFI_UNICAST, vrf_id); |
718e3744 | 3657 | if (! stable) |
3658 | return -1; | |
27b47253 PJ |
3659 | |
3660 | if (!gate && | |
3661 | (type == STATIC_IPV6_GATEWAY || type == STATIC_IPV6_GATEWAY_IFNAME)) | |
3662 | return -1; | |
3663 | ||
3664 | if (!ifname && | |
3665 | (type == STATIC_IPV6_GATEWAY_IFNAME || type == STATIC_IPV6_IFNAME)) | |
3666 | return -1; | |
718e3744 | 3667 | |
3668 | /* Lookup static route prefix. */ | |
3669 | rn = route_node_get (stable, p); | |
3670 | ||
3671 | /* Do nothing if there is a same static route. */ | |
3672 | for (si = rn->info; si; si = si->next) | |
3673 | { | |
3674 | if (distance == si->distance | |
3675 | && type == si->type | |
0d9551dc | 3676 | && tag == si->tag |
718e3744 | 3677 | && (! gate || IPV6_ADDR_SAME (gate, &si->ipv6)) |
3678 | && (! ifname || strcmp (ifname, si->ifname) == 0)) | |
3679 | { | |
3680 | route_unlock_node (rn); | |
3681 | return 0; | |
3682 | } | |
3683 | } | |
3684 | ||
3685 | /* Make new static route structure. */ | |
393deb9b | 3686 | si = XCALLOC (MTYPE_STATIC_IPV6, sizeof (struct static_ipv6)); |
718e3744 | 3687 | |
3688 | si->type = type; | |
3689 | si->distance = distance; | |
81dfcaa2 | 3690 | si->flags = flags; |
0d9551dc | 3691 | si->tag = tag; |
718e3744 | 3692 | |
3693 | switch (type) | |
3694 | { | |
3695 | case STATIC_IPV6_GATEWAY: | |
3696 | si->ipv6 = *gate; | |
3697 | break; | |
3698 | case STATIC_IPV6_IFNAME: | |
3699 | si->ifname = XSTRDUP (0, ifname); | |
3700 | break; | |
3701 | case STATIC_IPV6_GATEWAY_IFNAME: | |
3702 | si->ipv6 = *gate; | |
3703 | si->ifname = XSTRDUP (0, ifname); | |
3704 | break; | |
3705 | } | |
3706 | ||
3707 | /* Add new static route information to the tree with sort by | |
3708 | distance value and gateway address. */ | |
3709 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
3710 | { | |
3711 | if (si->distance < cp->distance) | |
3712 | break; | |
3713 | if (si->distance > cp->distance) | |
3714 | continue; | |
3715 | } | |
3716 | ||
3717 | /* Make linked list. */ | |
3718 | if (pp) | |
3719 | pp->next = si; | |
3720 | else | |
3721 | rn->info = si; | |
3722 | if (cp) | |
3723 | cp->prev = si; | |
3724 | si->prev = pp; | |
3725 | si->next = cp; | |
3726 | ||
3727 | /* Install into rib. */ | |
3728 | static_install_ipv6 (p, si); | |
3729 | ||
3730 | return 1; | |
3731 | } | |
3732 | ||
3733 | /* Delete static route from static route configuration. */ | |
3734 | int | |
3735 | static_delete_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
0d9551dc DS |
3736 | const char *ifname, u_short tag, u_char distance, |
3737 | u_int32_t vrf_id) | |
718e3744 | 3738 | { |
3739 | struct route_node *rn; | |
3740 | struct static_ipv6 *si; | |
3741 | struct route_table *stable; | |
3742 | ||
3743 | /* Lookup table. */ | |
b72ede27 | 3744 | stable = zebra_vrf_static_table (AFI_IP6, SAFI_UNICAST, vrf_id); |
718e3744 | 3745 | if (! stable) |
3746 | return -1; | |
3747 | ||
3748 | /* Lookup static route prefix. */ | |
3749 | rn = route_node_lookup (stable, p); | |
3750 | if (! rn) | |
3751 | return 0; | |
3752 | ||
3753 | /* Find same static route is the tree */ | |
3754 | for (si = rn->info; si; si = si->next) | |
3755 | if (distance == si->distance | |
3756 | && type == si->type | |
3757 | && (! gate || IPV6_ADDR_SAME (gate, &si->ipv6)) | |
0d9551dc DS |
3758 | && (! ifname || strcmp (ifname, si->ifname) == 0) |
3759 | && (! tag || (tag == si->tag))) | |
718e3744 | 3760 | break; |
3761 | ||
3762 | /* Can't find static route. */ | |
3763 | if (! si) | |
3764 | { | |
3765 | route_unlock_node (rn); | |
3766 | return 0; | |
3767 | } | |
3768 | ||
3769 | /* Install into rib. */ | |
3770 | static_uninstall_ipv6 (p, si); | |
3771 | ||
3772 | /* Unlink static route from linked list. */ | |
3773 | if (si->prev) | |
3774 | si->prev->next = si->next; | |
3775 | else | |
3776 | rn->info = si->next; | |
3777 | if (si->next) | |
3778 | si->next->prev = si->prev; | |
3779 | ||
3780 | /* Free static route configuration. */ | |
a0f6acd8 | 3781 | if (ifname) |
3782 | XFREE (0, si->ifname); | |
718e3744 | 3783 | XFREE (MTYPE_STATIC_IPV6, si); |
3784 | ||
3785 | return 1; | |
3786 | } | |
3787 | #endif /* HAVE_IPV6 */ | |
6b0655a2 | 3788 | |
b84c7253 | 3789 | /* RIB update function. */ |
3790 | void | |
3791 | rib_update_static (void) | |
3792 | { | |
3793 | struct route_node *rn; | |
3794 | struct route_table *table; | |
3795 | struct rib *rib, *next; | |
3796 | ||
b72ede27 | 3797 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, VRF_DEFAULT); |
b84c7253 | 3798 | if (table) |
3799 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
3800 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) | |
3801 | if (rib->type == ZEBRA_ROUTE_STATIC) | |
3802 | { | |
3803 | rib_queue_add (&zebrad, rn); | |
3804 | break; | |
3805 | } | |
3806 | ||
b72ede27 | 3807 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT); |
b84c7253 | 3808 | if (table) |
3809 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
3810 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) | |
3811 | if (rib->type == ZEBRA_ROUTE_STATIC) | |
3812 | { | |
3813 | rib_queue_add (&zebrad, rn); | |
3814 | break; | |
3815 | } | |
3816 | } | |
3817 | ||
718e3744 | 3818 | /* RIB update function. */ |
3819 | void | |
a1ac18c4 | 3820 | rib_update (void) |
718e3744 | 3821 | { |
3822 | struct route_node *rn; | |
3823 | struct route_table *table; | |
4d38fdb4 | 3824 | |
b72ede27 | 3825 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, VRF_DEFAULT); |
718e3744 | 3826 | if (table) |
3827 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3828 | if (rnode_to_ribs (rn)) |
6d691129 | 3829 | rib_queue_add (&zebrad, rn); |
718e3744 | 3830 | |
b72ede27 | 3831 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT); |
718e3744 | 3832 | if (table) |
3833 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3834 | if (rnode_to_ribs (rn)) |
6d691129 | 3835 | rib_queue_add (&zebrad, rn); |
718e3744 | 3836 | } |
3837 | ||
6b0655a2 | 3838 | |
718e3744 | 3839 | /* Remove all routes which comes from non main table. */ |
a1ac18c4 | 3840 | static void |
718e3744 | 3841 | rib_weed_table (struct route_table *table) |
3842 | { | |
3843 | struct route_node *rn; | |
3844 | struct rib *rib; | |
3845 | struct rib *next; | |
3846 | ||
3847 | if (table) | |
3848 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3849 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 3850 | { |
6d691129 PJ |
3851 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3852 | continue; | |
3853 | ||
b21b19c5 | 3854 | if (rib->table != zebrad.rtm_table_default && |
718e3744 | 3855 | rib->table != RT_TABLE_MAIN) |
4d38fdb4 | 3856 | rib_delnode (rn, rib); |
718e3744 | 3857 | } |
3858 | } | |
3859 | ||
3860 | /* Delete all routes from non main table. */ | |
3861 | void | |
a1ac18c4 | 3862 | rib_weed_tables (void) |
718e3744 | 3863 | { |
b72ede27 FL |
3864 | rib_weed_table (zebra_vrf_table (AFI_IP, SAFI_UNICAST, VRF_DEFAULT)); |
3865 | rib_weed_table (zebra_vrf_table (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT)); | |
718e3744 | 3866 | } |
6b0655a2 | 3867 | |
718e3744 | 3868 | /* Delete self installed routes after zebra is relaunched. */ |
a1ac18c4 | 3869 | static void |
718e3744 | 3870 | rib_sweep_table (struct route_table *table) |
3871 | { | |
3872 | struct route_node *rn; | |
3873 | struct rib *rib; | |
3874 | struct rib *next; | |
3875 | int ret = 0; | |
3876 | ||
3877 | if (table) | |
3878 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3879 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 3880 | { |
6d691129 PJ |
3881 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3882 | continue; | |
3883 | ||
718e3744 | 3884 | if (rib->type == ZEBRA_ROUTE_KERNEL && |
3885 | CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELFROUTE)) | |
3886 | { | |
3887 | ret = rib_uninstall_kernel (rn, rib); | |
3888 | if (! ret) | |
4d38fdb4 | 3889 | rib_delnode (rn, rib); |
718e3744 | 3890 | } |
3891 | } | |
3892 | } | |
3893 | ||
3894 | /* Sweep all RIB tables. */ | |
3895 | void | |
a1ac18c4 | 3896 | rib_sweep_route (void) |
718e3744 | 3897 | { |
b72ede27 FL |
3898 | rib_sweep_table (zebra_vrf_table (AFI_IP, SAFI_UNICAST, VRF_DEFAULT)); |
3899 | rib_sweep_table (zebra_vrf_table (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT)); | |
718e3744 | 3900 | } |
2ea1ab1c VT |
3901 | |
3902 | /* Remove specific by protocol routes from 'table'. */ | |
3903 | static unsigned long | |
7c8ff89e | 3904 | rib_score_proto_table (u_char proto, u_short instance, struct route_table *table) |
2ea1ab1c VT |
3905 | { |
3906 | struct route_node *rn; | |
3907 | struct rib *rib; | |
3908 | struct rib *next; | |
3909 | unsigned long n = 0; | |
3910 | ||
3911 | if (table) | |
3912 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3913 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
2ea1ab1c | 3914 | { |
2ea1ab1c VT |
3915 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3916 | continue; | |
7c8ff89e | 3917 | if (rib->type == proto && rib->instance == instance) |
2ea1ab1c VT |
3918 | { |
3919 | rib_delnode (rn, rib); | |
3920 | n++; | |
3921 | } | |
3922 | } | |
3923 | ||
3924 | return n; | |
3925 | } | |
3926 | ||
3927 | /* Remove specific by protocol routes. */ | |
3928 | unsigned long | |
7c8ff89e | 3929 | rib_score_proto (u_char proto, u_short instance) |
2ea1ab1c | 3930 | { |
b72ede27 FL |
3931 | return rib_score_proto_table (proto, instance, zebra_vrf_table (AFI_IP, SAFI_UNICAST, VRF_DEFAULT)) |
3932 | +rib_score_proto_table (proto, instance, zebra_vrf_table (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT)); | |
2ea1ab1c VT |
3933 | } |
3934 | ||
718e3744 | 3935 | /* Close RIB and clean up kernel routes. */ |
a1ac18c4 | 3936 | static void |
718e3744 | 3937 | rib_close_table (struct route_table *table) |
3938 | { | |
3939 | struct route_node *rn; | |
3940 | struct rib *rib; | |
3941 | ||
3942 | if (table) | |
3943 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3944 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 | 3945 | { |
9fd92e3c AS |
3946 | if (!CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
3947 | continue; | |
3948 | ||
5adc2528 AS |
3949 | zfpm_trigger_update (rn, NULL); |
3950 | ||
9fd92e3c AS |
3951 | if (! RIB_SYSTEM_ROUTE (rib)) |
3952 | rib_uninstall_kernel (rn, rib); | |
6d691129 | 3953 | } |
718e3744 | 3954 | } |
3955 | ||
3956 | /* Close all RIB tables. */ | |
3957 | void | |
a1ac18c4 | 3958 | rib_close (void) |
718e3744 | 3959 | { |
5c610faf DS |
3960 | struct listnode *node, *nnode; |
3961 | struct interface *ifp; | |
3962 | ||
b72ede27 FL |
3963 | rib_close_table (zebra_vrf_table (AFI_IP, SAFI_UNICAST, VRF_DEFAULT)); |
3964 | rib_close_table (zebra_vrf_table (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT)); | |
5c610faf DS |
3965 | |
3966 | for (ALL_LIST_ELEMENTS (iflist, node, nnode, ifp)) | |
3967 | if_nbr_ipv6ll_to_ipv4ll_neigh_del_all(ifp); | |
718e3744 | 3968 | } |
6b0655a2 | 3969 | |
718e3744 | 3970 | /* Routing information base initialize. */ |
3971 | void | |
a1ac18c4 | 3972 | rib_init (void) |
718e3744 | 3973 | { |
4d38fdb4 | 3974 | rib_queue_init (&zebrad); |
718e3744 | 3975 | } |
0915bb0c AS |
3976 | |
3977 | /* | |
3978 | * vrf_id_get_next | |
3979 | * | |
3980 | * Get the first vrf id that is greater than the given vrf id if any. | |
3981 | * | |
3982 | * Returns TRUE if a vrf id was found, FALSE otherwise. | |
3983 | */ | |
3984 | static inline int | |
b72ede27 | 3985 | vrf_id_get_next (vrf_id_t vrf_id, vrf_id_t *next_id_p) |
0915bb0c | 3986 | { |
b72ede27 FL |
3987 | vrf_iter_t iter = vrf_iterator (vrf_id); |
3988 | struct zebra_vrf *zvrf = vrf_iter2info (iter); | |
3989 | ||
3990 | /* The same one ? Then find out the next. */ | |
3991 | if (zvrf && (zvrf->vrf_id == vrf_id)) | |
3992 | zvrf = vrf_iter2info (vrf_next (iter)); | |
3993 | ||
3994 | if (zvrf) | |
0915bb0c | 3995 | { |
b72ede27 FL |
3996 | *next_id_p = zvrf->vrf_id; |
3997 | return 1; | |
0915bb0c AS |
3998 | } |
3999 | ||
4000 | return 0; | |
4001 | } | |
4002 | ||
4003 | /* | |
4004 | * rib_tables_iter_next | |
4005 | * | |
4006 | * Returns the next table in the iteration. | |
4007 | */ | |
4008 | struct route_table * | |
4009 | rib_tables_iter_next (rib_tables_iter_t *iter) | |
4010 | { | |
4011 | struct route_table *table; | |
4012 | ||
4013 | /* | |
4014 | * Array that helps us go over all AFI/SAFI combinations via one | |
4015 | * index. | |
4016 | */ | |
4017 | static struct { | |
4018 | afi_t afi; | |
4019 | safi_t safi; | |
4020 | } afi_safis[] = { | |
4021 | { AFI_IP, SAFI_UNICAST }, | |
4022 | { AFI_IP, SAFI_MULTICAST }, | |
4023 | { AFI_IP6, SAFI_UNICAST }, | |
4024 | { AFI_IP6, SAFI_MULTICAST }, | |
4025 | }; | |
4026 | ||
4027 | table = NULL; | |
4028 | ||
4029 | switch (iter->state) | |
4030 | { | |
4031 | ||
4032 | case RIB_TABLES_ITER_S_INIT: | |
4033 | iter->vrf_id = 0; | |
4034 | iter->afi_safi_ix = -1; | |
4035 | ||
4036 | /* Fall through */ | |
4037 | ||
4038 | case RIB_TABLES_ITER_S_ITERATING: | |
4039 | iter->afi_safi_ix++; | |
4040 | while (1) | |
4041 | { | |
4042 | ||
4043 | while (iter->afi_safi_ix < (int) ZEBRA_NUM_OF (afi_safis)) | |
4044 | { | |
b72ede27 | 4045 | table = zebra_vrf_table (afi_safis[iter->afi_safi_ix].afi, |
0915bb0c AS |
4046 | afi_safis[iter->afi_safi_ix].safi, |
4047 | iter->vrf_id); | |
4048 | if (table) | |
4049 | break; | |
4050 | ||
4051 | iter->afi_safi_ix++; | |
4052 | } | |
4053 | ||
4054 | /* | |
4055 | * Found another table in this vrf. | |
4056 | */ | |
4057 | if (table) | |
4058 | break; | |
4059 | ||
4060 | /* | |
4061 | * Done with all tables in the current vrf, go to the next | |
4062 | * one. | |
4063 | */ | |
4064 | if (!vrf_id_get_next (iter->vrf_id, &iter->vrf_id)) | |
4065 | break; | |
4066 | ||
4067 | iter->afi_safi_ix = 0; | |
4068 | } | |
4069 | ||
4070 | break; | |
4071 | ||
4072 | case RIB_TABLES_ITER_S_DONE: | |
4073 | return NULL; | |
4074 | } | |
4075 | ||
4076 | if (table) | |
4077 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
4078 | else | |
4079 | iter->state = RIB_TABLES_ITER_S_DONE; | |
4080 | ||
4081 | return table; | |
4082 | } | |
b72ede27 FL |
4083 | |
4084 | /* | |
4085 | * Create a routing table for the specific AFI/SAFI in the given VRF. | |
4086 | */ | |
4087 | static void | |
4088 | zebra_vrf_table_create (struct zebra_vrf *zvrf, afi_t afi, safi_t safi) | |
4089 | { | |
4090 | rib_table_info_t *info; | |
4091 | struct route_table *table; | |
4092 | ||
4093 | assert (!zvrf->table[afi][safi]); | |
4094 | ||
4095 | table = route_table_init (); | |
4096 | zvrf->table[afi][safi] = table; | |
4097 | ||
4098 | info = XCALLOC (MTYPE_RIB_TABLE_INFO, sizeof (*info)); | |
4099 | info->zvrf = zvrf; | |
4100 | info->afi = afi; | |
4101 | info->safi = safi; | |
4102 | table->info = info; | |
4103 | } | |
4104 | ||
4105 | /* Allocate new zebra VRF. */ | |
4106 | struct zebra_vrf * | |
4107 | zebra_vrf_alloc (vrf_id_t vrf_id) | |
4108 | { | |
4109 | struct zebra_vrf *zvrf; | |
4110 | ||
4111 | zvrf = XCALLOC (MTYPE_ZEBRA_VRF, sizeof (struct zebra_vrf)); | |
4112 | ||
4113 | /* Allocate routing table and static table. */ | |
4114 | zebra_vrf_table_create (zvrf, AFI_IP, SAFI_UNICAST); | |
4115 | zebra_vrf_table_create (zvrf, AFI_IP6, SAFI_UNICAST); | |
4116 | zvrf->stable[AFI_IP][SAFI_UNICAST] = route_table_init (); | |
4117 | zvrf->stable[AFI_IP6][SAFI_UNICAST] = route_table_init (); | |
4118 | zebra_vrf_table_create (zvrf, AFI_IP, SAFI_MULTICAST); | |
4119 | zebra_vrf_table_create (zvrf, AFI_IP6, SAFI_MULTICAST); | |
4120 | zvrf->stable[AFI_IP][SAFI_MULTICAST] = route_table_init (); | |
4121 | zvrf->stable[AFI_IP6][SAFI_MULTICAST] = route_table_init (); | |
4122 | ||
4123 | zvrf->rnh_table[AFI_IP] = route_table_init(); | |
4124 | zvrf->rnh_table[AFI_IP6] = route_table_init(); | |
4125 | ||
4126 | zvrf->import_check_table[AFI_IP] = route_table_init(); | |
4127 | zvrf->import_check_table[AFI_IP6] = route_table_init(); | |
4128 | ||
4129 | /* Set VRF ID */ | |
4130 | zvrf->vrf_id = vrf_id; | |
4131 | ||
4132 | return zvrf; | |
4133 | } | |
4134 | ||
4135 | /* Lookup VRF by identifier. */ | |
4136 | struct zebra_vrf * | |
4137 | zebra_vrf_lookup (vrf_id_t vrf_id) | |
4138 | { | |
4139 | return vector_lookup (zebra_vrf_vector, vrf_id); | |
4140 | } | |
4141 | ||
4142 | /* Lookup the routing table in an enabled VRF. */ | |
4143 | struct route_table * | |
4144 | zebra_vrf_table (afi_t afi, safi_t safi, vrf_id_t vrf_id) | |
4145 | { | |
4146 | struct zebra_vrf *zvrf = vrf_info_lookup (vrf_id); | |
4147 | ||
4148 | if (!zvrf) | |
4149 | return NULL; | |
4150 | ||
4151 | if (afi >= AFI_MAX || safi >= SAFI_MAX) | |
4152 | return NULL; | |
4153 | ||
4154 | return zvrf->table[afi][safi]; | |
4155 | } | |
4156 | ||
4157 | /* Lookup the static routing table in a VRF. */ | |
4158 | struct route_table * | |
4159 | zebra_vrf_static_table (afi_t afi, safi_t safi, vrf_id_t vrf_id) | |
4160 | { | |
4161 | struct zebra_vrf *zvrf = vrf_info_lookup (vrf_id); | |
4162 | ||
4163 | if (!zvrf) | |
4164 | return NULL; | |
4165 | ||
4166 | if (afi >= AFI_MAX || safi >= SAFI_MAX) | |
4167 | return NULL; | |
4168 | ||
4169 | return zvrf->stable[afi][safi]; | |
4170 | } | |
4171 | ||
4172 | struct route_table * | |
4173 | zebra_vrf_other_route_table (afi_t afi, u_int32_t table_id, vrf_id_t vrf_id) | |
4174 | { | |
4175 | struct zebra_vrf *zvrf; | |
4176 | ||
4177 | zvrf = vrf_info_lookup (vrf_id); | |
4178 | if (! zvrf) | |
4179 | return NULL; | |
4180 | ||
4181 | if(afi >= AFI_MAX) | |
4182 | return NULL; | |
4183 | ||
4184 | if (table_id >= ZEBRA_KERNEL_TABLE_MAX) | |
4185 | return NULL; | |
4186 | ||
4187 | if (zvrf->other_table[afi][table_id] == NULL) | |
4188 | { | |
4189 | zvrf->other_table[afi][table_id] = route_table_init(); | |
4190 | } | |
4191 | ||
4192 | return (zvrf->other_table[afi][table_id]); | |
4193 | } | |
4194 | ||
4195 |