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718e3744 | 1 | /* |
2 | * Address linked list routine. | |
3 | * Copyright (C) 1997, 98 Kunihiro Ishiguro | |
4 | * | |
5 | * This file is part of GNU Zebra. | |
6 | * | |
7 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * GNU Zebra is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
19 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
20 | * 02111-1307, USA. | |
21 | */ | |
22 | ||
23 | #include <zebra.h> | |
24 | ||
25 | #include "prefix.h" | |
26 | #include "linklist.h" | |
27 | #include "if.h" | |
28 | #include "table.h" | |
29 | #include "rib.h" | |
30 | #include "table.h" | |
31 | #include "log.h" | |
0752ef0b | 32 | #include "memory.h" |
718e3744 | 33 | |
34 | #include "zebra/zserv.h" | |
35 | #include "zebra/redistribute.h" | |
eef1fe11 | 36 | #include "zebra/interface.h" |
a1ac18c4 | 37 | #include "zebra/connected.h" |
718e3744 | 38 | \f |
ca16218d | 39 | /* withdraw a connected address */ |
40 | static void | |
41 | connected_withdraw (struct connected *ifc) | |
42 | { | |
43 | if (! ifc) | |
44 | return; | |
45 | ||
46 | /* Update interface address information to protocol daemon. */ | |
47 | if (CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL)) | |
48 | { | |
49 | zebra_interface_address_delete_update (ifc->ifp, ifc); | |
50 | ||
51 | if_subnet_delete (ifc->ifp, ifc); | |
52 | ||
53 | if (ifc->address->family == AF_INET) | |
54 | connected_down_ipv4 (ifc->ifp, ifc); | |
aa2e32be | 55 | #ifdef HAVE_IPV6 |
ca16218d | 56 | else |
57 | connected_down_ipv6 (ifc->ifp, ifc); | |
aa2e32be | 58 | #endif |
ca16218d | 59 | |
60 | UNSET_FLAG (ifc->conf, ZEBRA_IFC_REAL); | |
61 | } | |
62 | ||
63 | listnode_delete (ifc->ifp->connected, ifc); | |
64 | connected_free (ifc); | |
65 | } | |
66 | ||
67 | static void | |
68 | connected_announce (struct interface *ifp, struct connected *ifc) | |
69 | { | |
70 | if (!ifc) | |
71 | return; | |
72 | ||
73 | listnode_add (ifp->connected, ifc); | |
74 | ||
75 | /* Update interface address information to protocol daemon. */ | |
76 | if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL)) | |
77 | { | |
78 | if (ifc->address->family == AF_INET) | |
79 | if_subnet_add (ifp, ifc); | |
80 | ||
81 | SET_FLAG (ifc->conf, ZEBRA_IFC_REAL); | |
82 | ||
83 | zebra_interface_address_add_update (ifp, ifc); | |
84 | ||
85 | if (if_is_up(ifp)) | |
86 | { | |
87 | if (ifc->address->family == AF_INET) | |
88 | connected_up_ipv4 (ifp, ifc); | |
aa2e32be | 89 | #ifdef HAVE_IPV6 |
ca16218d | 90 | else |
91 | connected_up_ipv6 (ifp, ifc); | |
aa2e32be | 92 | #endif |
ca16218d | 93 | } |
94 | } | |
95 | } | |
96 | \f | |
718e3744 | 97 | /* If same interface address is already exist... */ |
98 | struct connected * | |
ca16218d | 99 | connected_check (struct interface *ifp, struct prefix *p) |
718e3744 | 100 | { |
101 | struct connected *ifc; | |
52dc7ee6 | 102 | struct listnode *node; |
718e3744 | 103 | |
1eb8ef25 | 104 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, node, ifc)) |
105 | if (prefix_same (ifc->address, p)) | |
106 | return ifc; | |
718e3744 | 107 | |
718e3744 | 108 | return NULL; |
109 | } | |
110 | ||
111 | /* Called from if_up(). */ | |
112 | void | |
113 | connected_up_ipv4 (struct interface *ifp, struct connected *ifc) | |
114 | { | |
115 | struct prefix_ipv4 p; | |
116 | struct prefix_ipv4 *addr; | |
117 | struct prefix_ipv4 *dest; | |
118 | ||
119 | if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL)) | |
120 | return; | |
121 | ||
122 | addr = (struct prefix_ipv4 *) ifc->address; | |
123 | dest = (struct prefix_ipv4 *) ifc->destination; | |
124 | ||
125 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
126 | p.family = AF_INET; | |
127 | p.prefixlen = addr->prefixlen; | |
128 | ||
129 | /* Point-to-point check. */ | |
3fb9cd6e | 130 | if (CONNECTED_POINTOPOINT_HOST(ifc)) |
718e3744 | 131 | p.prefix = dest->prefix; |
132 | else | |
133 | p.prefix = addr->prefix; | |
134 | ||
135 | /* Apply mask to the network. */ | |
136 | apply_mask_ipv4 (&p); | |
137 | ||
138 | /* In case of connected address is 0.0.0.0/0 we treat it tunnel | |
139 | address. */ | |
140 | if (prefix_ipv4_any (&p)) | |
141 | return; | |
142 | ||
143 | rib_add_ipv4 (ZEBRA_ROUTE_CONNECT, 0, &p, NULL, ifp->ifindex, 0, 0, 0); | |
144 | ||
145 | rib_update (); | |
146 | } | |
147 | ||
148 | /* Add connected IPv4 route to the interface. */ | |
149 | void | |
150 | connected_add_ipv4 (struct interface *ifp, int flags, struct in_addr *addr, | |
d06b2a64 | 151 | u_char prefixlen, struct in_addr *broad, |
152 | const char *label) | |
718e3744 | 153 | { |
154 | struct prefix_ipv4 *p; | |
155 | struct connected *ifc; | |
156 | struct connected *current; | |
157 | ||
158 | /* Make connected structure. */ | |
159 | ifc = connected_new (); | |
160 | ifc->ifp = ifp; | |
161 | ifc->flags = flags; | |
162 | ||
163 | /* Allocate new connected address. */ | |
164 | p = prefix_ipv4_new (); | |
165 | p->family = AF_INET; | |
166 | p->prefix = *addr; | |
167 | p->prefixlen = prefixlen; | |
168 | ifc->address = (struct prefix *) p; | |
ca16218d | 169 | |
718e3744 | 170 | /* If there is broadcast or pointopoint address. */ |
171 | if (broad) | |
172 | { | |
173 | p = prefix_ipv4_new (); | |
174 | p->family = AF_INET; | |
175 | p->prefix = *broad; | |
176 | ifc->destination = (struct prefix *) p; | |
3fb9cd6e | 177 | |
178 | /* validate the destination address */ | |
179 | if (ifp->flags & IFF_POINTOPOINT) | |
180 | { | |
181 | if (IPV4_ADDR_SAME(addr,broad)) | |
182 | zlog_warn("warning: PtP interface %s has same local and peer " | |
183 | "address %s, routing protocols may malfunction", | |
184 | ifp->name,inet_ntoa(*addr)); | |
185 | else if ((prefixlen != IPV4_MAX_PREFIXLEN) && | |
186 | (ipv4_network_addr(addr->s_addr,prefixlen) != | |
187 | ipv4_network_addr(broad->s_addr,prefixlen))) | |
188 | { | |
189 | char buf[2][INET_ADDRSTRLEN]; | |
190 | zlog_warn("warning: PtP interface %s network mismatch: local " | |
191 | "%s/%d vs. peer %s, routing protocols may malfunction", | |
192 | ifp->name, | |
193 | inet_ntop (AF_INET, addr, buf[0], sizeof(buf[0])), | |
194 | prefixlen, | |
195 | inet_ntop (AF_INET, broad, buf[1], sizeof(buf[1]))); | |
196 | } | |
197 | } | |
198 | else | |
199 | { | |
200 | if (broad->s_addr != ipv4_broadcast_addr(addr->s_addr,prefixlen)) | |
201 | { | |
202 | char buf[2][INET_ADDRSTRLEN]; | |
203 | struct in_addr bcalc; | |
204 | bcalc.s_addr = ipv4_broadcast_addr(addr->s_addr,prefixlen); | |
205 | zlog_warn("warning: interface %s broadcast addr %s/%d != " | |
206 | "calculated %s, routing protocols may malfunction", | |
207 | ifp->name, | |
208 | inet_ntop (AF_INET, broad, buf[0], sizeof(buf[0])), | |
209 | prefixlen, | |
210 | inet_ntop (AF_INET, &bcalc, buf[1], sizeof(buf[1]))); | |
211 | } | |
212 | } | |
213 | ||
718e3744 | 214 | } |
3fb9cd6e | 215 | else |
216 | /* no broadcast or destination address was supplied */ | |
341a8f1a | 217 | if ((prefixlen == IPV4_MAX_PREFIXLEN) && if_is_pointopoint(ifp)) |
218 | zlog_warn("warning: PtP interface %s with addr %s/%d needs a " | |
219 | "peer address",ifp->name,inet_ntoa(*addr),prefixlen); | |
718e3744 | 220 | |
221 | /* Label of this address. */ | |
222 | if (label) | |
0752ef0b | 223 | ifc->label = XSTRDUP (MTYPE_CONNECTED_LABEL, label); |
718e3744 | 224 | |
225 | /* Check same connected route. */ | |
ca16218d | 226 | if ((current = connected_check (ifp, (struct prefix *) ifc->address))) |
227 | connected_withdraw (current); /* implicit withdraw - freebsd does this */ | |
228 | ||
229 | connected_announce (ifp, ifc); | |
718e3744 | 230 | } |
231 | ||
232 | void | |
233 | connected_down_ipv4 (struct interface *ifp, struct connected *ifc) | |
234 | { | |
235 | struct prefix_ipv4 p; | |
236 | struct prefix_ipv4 *addr; | |
237 | struct prefix_ipv4 *dest; | |
238 | ||
239 | if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL)) | |
240 | return; | |
241 | ||
242 | addr = (struct prefix_ipv4 *)ifc->address; | |
243 | dest = (struct prefix_ipv4 *)ifc->destination; | |
244 | ||
245 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
246 | p.family = AF_INET; | |
247 | p.prefixlen = addr->prefixlen; | |
248 | ||
960182aa | 249 | /* Point-to-point check. */ |
3fb9cd6e | 250 | if (CONNECTED_POINTOPOINT_HOST(ifc)) |
718e3744 | 251 | p.prefix = dest->prefix; |
252 | else | |
253 | p.prefix = addr->prefix; | |
254 | ||
255 | /* Apply mask to the network. */ | |
256 | apply_mask_ipv4 (&p); | |
257 | ||
258 | /* In case of connected address is 0.0.0.0/0 we treat it tunnel | |
259 | address. */ | |
260 | if (prefix_ipv4_any (&p)) | |
261 | return; | |
262 | ||
263 | rib_delete_ipv4 (ZEBRA_ROUTE_CONNECT, 0, &p, NULL, ifp->ifindex, 0); | |
264 | ||
265 | rib_update (); | |
266 | } | |
267 | ||
268 | /* Delete connected IPv4 route to the interface. */ | |
269 | void | |
270 | connected_delete_ipv4 (struct interface *ifp, int flags, struct in_addr *addr, | |
0752ef0b | 271 | u_char prefixlen, struct in_addr *broad) |
718e3744 | 272 | { |
273 | struct prefix_ipv4 p; | |
274 | struct connected *ifc; | |
275 | ||
276 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
277 | p.family = AF_INET; | |
278 | p.prefix = *addr; | |
279 | p.prefixlen = prefixlen; | |
280 | ||
ca16218d | 281 | ifc = connected_check (ifp, (struct prefix *) &p); |
718e3744 | 282 | if (! ifc) |
283 | return; | |
ca16218d | 284 | |
285 | connected_withdraw (ifc); | |
718e3744 | 286 | } |
287 | ||
288 | #ifdef HAVE_IPV6 | |
718e3744 | 289 | void |
290 | connected_up_ipv6 (struct interface *ifp, struct connected *ifc) | |
291 | { | |
292 | struct prefix_ipv6 p; | |
293 | struct prefix_ipv6 *addr; | |
294 | struct prefix_ipv6 *dest; | |
295 | ||
296 | if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL)) | |
297 | return; | |
298 | ||
299 | addr = (struct prefix_ipv6 *) ifc->address; | |
300 | dest = (struct prefix_ipv6 *) ifc->destination; | |
301 | ||
302 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
303 | p.family = AF_INET6; | |
304 | p.prefixlen = addr->prefixlen; | |
305 | ||
31a476c7 | 306 | if (if_is_pointopoint (ifp) && dest) |
718e3744 | 307 | { |
308 | if (IN6_IS_ADDR_UNSPECIFIED (&dest->prefix)) | |
309 | p.prefix = addr->prefix; | |
310 | else | |
311 | p.prefix = dest->prefix; | |
312 | } | |
313 | else | |
314 | p.prefix = addr->prefix; | |
315 | ||
316 | /* Apply mask to the network. */ | |
317 | apply_mask_ipv6 (&p); | |
318 | ||
726f9b2b | 319 | #if ! defined (MUSICA) && ! defined (LINUX) |
320 | /* XXX: It is already done by rib_bogus_ipv6 within rib_add_ipv6 */ | |
718e3744 | 321 | if (IN6_IS_ADDR_UNSPECIFIED (&p.prefix)) |
322 | return; | |
726f9b2b | 323 | #endif |
718e3744 | 324 | |
be61c4eb | 325 | rib_add_ipv6 (ZEBRA_ROUTE_CONNECT, 0, &p, NULL, ifp->ifindex, 0, 0, 0); |
718e3744 | 326 | |
327 | rib_update (); | |
328 | } | |
329 | ||
330 | /* Add connected IPv6 route to the interface. */ | |
331 | void | |
332 | connected_add_ipv6 (struct interface *ifp, struct in6_addr *addr, | |
0752ef0b | 333 | u_char prefixlen, struct in6_addr *broad, char *label) |
718e3744 | 334 | { |
335 | struct prefix_ipv6 *p; | |
336 | struct connected *ifc; | |
337 | struct connected *current; | |
338 | ||
339 | /* Make connected structure. */ | |
340 | ifc = connected_new (); | |
341 | ifc->ifp = ifp; | |
342 | ||
343 | /* Allocate new connected address. */ | |
344 | p = prefix_ipv6_new (); | |
345 | p->family = AF_INET6; | |
346 | IPV6_ADDR_COPY (&p->prefix, addr); | |
347 | p->prefixlen = prefixlen; | |
348 | ifc->address = (struct prefix *) p; | |
349 | ||
350 | /* If there is broadcast or pointopoint address. */ | |
351 | if (broad) | |
352 | { | |
353 | p = prefix_ipv6_new (); | |
354 | p->family = AF_INET6; | |
355 | IPV6_ADDR_COPY (&p->prefix, broad); | |
356 | ifc->destination = (struct prefix *) p; | |
357 | } | |
358 | ||
0752ef0b | 359 | /* Label of this address. */ |
360 | if (label) | |
361 | ifc->label = XSTRDUP (MTYPE_CONNECTED_LABEL, label); | |
362 | ||
ca16218d | 363 | if ((current = connected_check (ifp, (struct prefix *) ifc->address))) |
364 | connected_withdraw (current); /* implicit update of existing address */ | |
365 | ||
366 | connected_announce (ifp, ifc); | |
718e3744 | 367 | } |
368 | ||
369 | void | |
370 | connected_down_ipv6 (struct interface *ifp, struct connected *ifc) | |
371 | { | |
372 | struct prefix_ipv6 p; | |
373 | struct prefix_ipv6 *addr; | |
374 | struct prefix_ipv6 *dest; | |
375 | ||
376 | if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL)) | |
377 | return; | |
378 | ||
379 | addr = (struct prefix_ipv6 *) ifc->address; | |
380 | dest = (struct prefix_ipv6 *) ifc->destination; | |
381 | ||
382 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
383 | p.family = AF_INET6; | |
384 | p.prefixlen = addr->prefixlen; | |
385 | ||
31a476c7 | 386 | if (if_is_pointopoint (ifp) && dest) |
718e3744 | 387 | { |
388 | if (IN6_IS_ADDR_UNSPECIFIED (&dest->prefix)) | |
389 | p.prefix = addr->prefix; | |
390 | else | |
391 | p.prefix = dest->prefix; | |
392 | } | |
393 | else | |
394 | p.prefix = addr->prefix; | |
395 | ||
396 | apply_mask_ipv6 (&p); | |
397 | ||
398 | if (IN6_IS_ADDR_UNSPECIFIED (&p.prefix)) | |
399 | return; | |
400 | ||
401 | rib_delete_ipv6 (ZEBRA_ROUTE_CONNECT, 0, &p, NULL, ifp->ifindex, 0); | |
402 | ||
403 | rib_update (); | |
404 | } | |
405 | ||
406 | void | |
407 | connected_delete_ipv6 (struct interface *ifp, struct in6_addr *address, | |
fce954f8 | 408 | u_char prefixlen, struct in6_addr *broad) |
718e3744 | 409 | { |
410 | struct prefix_ipv6 p; | |
411 | struct connected *ifc; | |
412 | ||
413 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
414 | p.family = AF_INET6; | |
415 | memcpy (&p.prefix, address, sizeof (struct in6_addr)); | |
416 | p.prefixlen = prefixlen; | |
417 | ||
ca16218d | 418 | ifc = connected_check (ifp, (struct prefix *) &p); |
718e3744 | 419 | if (! ifc) |
420 | return; | |
421 | ||
ca16218d | 422 | connected_withdraw (ifc); |
718e3744 | 423 | } |
424 | #endif /* HAVE_IPV6 */ |