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7f57883e DS |
1 | /* |
2 | * EIGRP Filter Functions. | |
3 | * Copyright (C) 2013-2015 | |
4 | * Authors: | |
5 | * Donnie Savage | |
6 | * Jan Janovic | |
7 | * Matej Perina | |
8 | * Peter Orsag | |
9 | * Peter Paluch | |
10 | * Frantisek Gazo | |
11 | * Tomas Hvorkovy | |
12 | * Martin Kontsek | |
13 | * Lukas Koribsky | |
14 | * | |
15 | * | |
16 | * This file is part of GNU Zebra. | |
17 | * | |
18 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
19 | * under the terms of the GNU General Public License as published by the | |
20 | * Free Software Foundation; either version 2, or (at your option) any | |
21 | * later version. | |
22 | * | |
23 | * GNU Zebra is distributed in the hope that it will be useful, but | |
24 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
26 | * General Public License for more details. | |
27 | * | |
896014f4 DL |
28 | * You should have received a copy of the GNU General Public License along |
29 | * with this program; see the file COPYING; if not, write to the Free Software | |
30 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
7f57883e DS |
31 | */ |
32 | ||
33 | #include <zebra.h> | |
34 | ||
35 | #include "if.h" | |
36 | #include "command.h" | |
37 | #include "prefix.h" | |
38 | #include "table.h" | |
39 | #include "thread.h" | |
40 | #include "memory.h" | |
41 | #include "log.h" | |
42 | #include "stream.h" | |
43 | #include "filter.h" | |
44 | #include "sockunion.h" | |
45 | #include "sockopt.h" | |
46 | #include "routemap.h" | |
47 | #include "if_rmap.h" | |
48 | #include "plist.h" | |
49 | #include "distribute.h" | |
50 | #include "md5.h" | |
51 | #include "keychain.h" | |
52 | #include "privs.h" | |
53 | #include "vrf.h" | |
54 | ||
55 | #include "eigrpd/eigrp_structs.h" | |
56 | #include "eigrpd/eigrpd.h" | |
57 | #include "eigrpd/eigrp_const.h" | |
58 | #include "eigrpd/eigrp_filter.h" | |
59 | #include "eigrpd/eigrp_packet.h" | |
60 | #include "eigrpd/eigrp_memory.h" | |
61 | ||
62 | /* | |
63 | * Distribute-list update functions. | |
64 | */ | |
03a38493 PG |
65 | void eigrp_distribute_update(struct distribute_ctx *ctx, |
66 | struct distribute *dist) | |
7f57883e | 67 | { |
4cfff48a | 68 | struct eigrp *e = eigrp_lookup(ctx->vrf->vrf_id); |
d62a17ae | 69 | struct interface *ifp; |
70 | struct eigrp_interface *ei = NULL; | |
71 | struct access_list *alist; | |
72 | struct prefix_list *plist; | |
73 | // struct route_map *routemap; | |
d62a17ae | 74 | |
75 | /* if no interface address is present, set list to eigrp process struct | |
76 | */ | |
d62a17ae | 77 | |
78 | /* Check if distribute-list was set for process or interface */ | |
79 | if (!dist->ifname) { | |
80 | /* access list IN for whole process */ | |
81 | if (dist->list[DISTRIBUTE_V4_IN]) { | |
82 | alist = access_list_lookup( | |
83 | AFI_IP, dist->list[DISTRIBUTE_V4_IN]); | |
84 | if (alist) | |
85 | e->list[EIGRP_FILTER_IN] = alist; | |
86 | else | |
87 | e->list[EIGRP_FILTER_IN] = NULL; | |
88 | } else { | |
89 | e->list[EIGRP_FILTER_IN] = NULL; | |
90 | } | |
91 | ||
92 | /* access list OUT for whole process */ | |
93 | if (dist->list[DISTRIBUTE_V4_OUT]) { | |
94 | alist = access_list_lookup( | |
95 | AFI_IP, dist->list[DISTRIBUTE_V4_OUT]); | |
96 | if (alist) | |
97 | e->list[EIGRP_FILTER_OUT] = alist; | |
98 | else | |
99 | e->list[EIGRP_FILTER_OUT] = NULL; | |
100 | } else { | |
101 | e->list[EIGRP_FILTER_OUT] = NULL; | |
102 | } | |
103 | ||
104 | /* PREFIX_LIST IN for process */ | |
105 | if (dist->prefix[DISTRIBUTE_V4_IN]) { | |
106 | plist = prefix_list_lookup( | |
107 | AFI_IP, dist->prefix[DISTRIBUTE_V4_IN]); | |
108 | if (plist) { | |
109 | e->prefix[EIGRP_FILTER_IN] = plist; | |
110 | } else | |
111 | e->prefix[EIGRP_FILTER_IN] = NULL; | |
112 | } else | |
113 | e->prefix[EIGRP_FILTER_IN] = NULL; | |
114 | ||
115 | /* PREFIX_LIST OUT for process */ | |
116 | if (dist->prefix[DISTRIBUTE_V4_OUT]) { | |
117 | plist = prefix_list_lookup( | |
118 | AFI_IP, dist->prefix[DISTRIBUTE_V4_OUT]); | |
119 | if (plist) { | |
120 | e->prefix[EIGRP_FILTER_OUT] = plist; | |
121 | ||
122 | } else | |
123 | e->prefix[EIGRP_FILTER_OUT] = NULL; | |
124 | } else | |
125 | e->prefix[EIGRP_FILTER_OUT] = NULL; | |
126 | ||
127 | // This is commented out, because the distribute.[ch] code | |
128 | // changes looked poorly written from first glance | |
129 | // commit was 133bdf2d | |
130 | // TODO: DBS | |
7f57883e | 131 | #if 0 |
f9e5c9ca DS |
132 | /* route-map IN for whole process */ |
133 | if (dist->route[DISTRIBUTE_V4_IN]) | |
134 | { | |
135 | routemap = route_map_lookup_by_name (dist->route[DISTRIBUTE_V4_IN]); | |
136 | if (routemap) | |
137 | e->routemap[EIGRP_FILTER_IN] = routemap; | |
138 | else | |
139 | e->routemap[EIGRP_FILTER_IN] = NULL; | |
140 | } | |
141 | else | |
142 | { | |
143 | e->routemap[EIGRP_FILTER_IN] = NULL; | |
144 | } | |
145 | ||
146 | /* route-map OUT for whole process */ | |
147 | if (dist->route[DISTRIBUTE_V4_OUT]) | |
148 | { | |
149 | routemap = route_map_lookup_by_name (dist->route[DISTRIBUTE_V4_OUT]); | |
150 | if (routemap) | |
151 | e->routemap[EIGRP_FILTER_OUT] = routemap; | |
152 | else | |
153 | e->routemap[EIGRP_FILTER_OUT] = NULL; | |
154 | } | |
155 | else | |
156 | { | |
157 | e->routemap[EIGRP_FILTER_OUT] = NULL; | |
158 | } | |
7f57883e | 159 | #endif |
d62a17ae | 160 | // TODO: check Graceful restart after 10sec |
161 | ||
162 | /* check if there is already GR scheduled */ | |
163 | if (e->t_distribute != NULL) { | |
164 | /* if is, cancel schedule */ | |
165 | thread_cancel(e->t_distribute); | |
166 | } | |
167 | /* schedule Graceful restart for whole process in 10sec */ | |
168 | e->t_distribute = NULL; | |
169 | thread_add_timer(master, eigrp_distribute_timer_process, e, | |
170 | (10), &e->t_distribute); | |
171 | ||
172 | return; | |
173 | } | |
174 | ||
daa64bdf | 175 | ifp = if_lookup_by_name(dist->ifname, e->vrf_id); |
d62a17ae | 176 | if (ifp == NULL) |
177 | return; | |
178 | ||
179 | /*struct eigrp_if_info * info = ifp->info; | |
180 | ei = info->eigrp_interface;*/ | |
181 | struct listnode *node, *nnode; | |
182 | struct eigrp_interface *ei2; | |
183 | /* Find proper interface */ | |
184 | for (ALL_LIST_ELEMENTS(e->eiflist, node, nnode, ei2)) { | |
185 | if (strcmp(ei2->ifp->name, ifp->name) == 0) { | |
186 | ei = ei2; | |
187 | break; | |
188 | } | |
189 | } | |
85bbc95d | 190 | assert(ei != NULL); |
d62a17ae | 191 | |
192 | /* Access-list for interface in */ | |
193 | if (dist->list[DISTRIBUTE_V4_IN]) { | |
194 | alist = access_list_lookup(AFI_IP, | |
195 | dist->list[DISTRIBUTE_V4_IN]); | |
196 | if (alist) { | |
197 | ei->list[EIGRP_FILTER_IN] = alist; | |
198 | } else | |
199 | ei->list[EIGRP_FILTER_IN] = NULL; | |
200 | } else { | |
201 | ei->list[EIGRP_FILTER_IN] = NULL; | |
202 | } | |
203 | ||
204 | /* Access-list for interface in */ | |
205 | if (dist->list[DISTRIBUTE_V4_OUT]) { | |
206 | alist = access_list_lookup(AFI_IP, | |
207 | dist->list[DISTRIBUTE_V4_OUT]); | |
208 | if (alist) | |
209 | ei->list[EIGRP_FILTER_OUT] = alist; | |
210 | else | |
211 | ei->list[EIGRP_FILTER_OUT] = NULL; | |
212 | ||
213 | } else | |
214 | ei->list[EIGRP_FILTER_OUT] = NULL; | |
215 | ||
216 | /* Prefix-list for interface in */ | |
217 | if (dist->prefix[DISTRIBUTE_V4_IN]) { | |
218 | plist = prefix_list_lookup(AFI_IP, | |
219 | dist->prefix[DISTRIBUTE_V4_IN]); | |
220 | if (plist) | |
221 | ei->prefix[EIGRP_FILTER_IN] = plist; | |
222 | else | |
223 | ei->prefix[EIGRP_FILTER_IN] = NULL; | |
224 | } else | |
225 | ei->prefix[EIGRP_FILTER_IN] = NULL; | |
226 | ||
227 | /* Prefix-list for interface out */ | |
228 | if (dist->prefix[DISTRIBUTE_V4_OUT]) { | |
229 | plist = prefix_list_lookup(AFI_IP, | |
230 | dist->prefix[DISTRIBUTE_V4_OUT]); | |
231 | if (plist) | |
232 | ei->prefix[EIGRP_FILTER_OUT] = plist; | |
233 | else | |
234 | ei->prefix[EIGRP_FILTER_OUT] = NULL; | |
235 | } else | |
236 | ei->prefix[EIGRP_FILTER_OUT] = NULL; | |
7f57883e DS |
237 | |
238 | #if 0 | |
239 | /* route-map IN for whole process */ | |
240 | if (dist->route[DISTRIBUTE_V4_IN]) | |
f9e5c9ca DS |
241 | { |
242 | zlog_info("<DEBUG ACL ALL in"); | |
243 | routemap = route_map_lookup_by_name (dist->route[DISTRIBUTE_V4_IN]); | |
244 | if (routemap) | |
245 | ei->routemap[EIGRP_FILTER_IN] = routemap; | |
246 | else | |
247 | ei->routemap[EIGRP_FILTER_IN] = NULL; | |
248 | } | |
7f57883e | 249 | else |
f9e5c9ca DS |
250 | { |
251 | ei->routemap[EIGRP_FILTER_IN] = NULL; | |
252 | } | |
7f57883e DS |
253 | |
254 | /* route-map OUT for whole process */ | |
255 | if (dist->route[DISTRIBUTE_V4_OUT]) | |
f9e5c9ca DS |
256 | { |
257 | routemap = route_map_lookup_by_name (dist->route[DISTRIBUTE_V4_OUT]); | |
258 | if (routemap) | |
259 | ei->routemap[EIGRP_FILTER_OUT] = routemap; | |
260 | else | |
261 | ei->routemap[EIGRP_FILTER_OUT] = NULL; | |
262 | } | |
7f57883e | 263 | else |
f9e5c9ca DS |
264 | { |
265 | ei->routemap[EIGRP_FILTER_OUT] = NULL; | |
266 | } | |
7f57883e | 267 | #endif |
d62a17ae | 268 | // TODO: check Graceful restart after 10sec |
269 | ||
270 | /* check if there is already GR scheduled */ | |
271 | if (ei->t_distribute != NULL) { | |
272 | /* if is, cancel schedule */ | |
273 | thread_cancel(ei->t_distribute); | |
274 | } | |
275 | /* schedule Graceful restart for interface in 10sec */ | |
276 | e->t_distribute = NULL; | |
277 | thread_add_timer(master, eigrp_distribute_timer_interface, ei, 10, | |
278 | &e->t_distribute); | |
7f57883e DS |
279 | } |
280 | ||
281 | /* | |
282 | * Function called by prefix-list and access-list update | |
283 | */ | |
d62a17ae | 284 | void eigrp_distribute_update_interface(struct interface *ifp) |
7f57883e | 285 | { |
d62a17ae | 286 | struct distribute *dist; |
03a38493 | 287 | struct eigrp *eigrp; |
7f57883e | 288 | |
e9449961 | 289 | eigrp = eigrp_lookup(ifp->vrf_id); |
03a38493 PG |
290 | if (!eigrp) |
291 | return; | |
292 | dist = distribute_lookup(eigrp->distribute_ctx, ifp->name); | |
d62a17ae | 293 | if (dist) |
03a38493 PG |
294 | eigrp_distribute_update(eigrp->distribute_ctx, |
295 | dist); | |
7f57883e DS |
296 | } |
297 | ||
298 | /* Update all interface's distribute list. | |
299 | * Function used in hook for prefix-list | |
300 | */ | |
d62a17ae | 301 | void eigrp_distribute_update_all(struct prefix_list *notused) |
7f57883e | 302 | { |
4cfff48a | 303 | struct vrf *vrf; |
d62a17ae | 304 | struct interface *ifp; |
7f57883e | 305 | |
4cfff48a DS |
306 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
307 | FOR_ALL_INTERFACES (vrf, ifp) | |
308 | eigrp_distribute_update_interface(ifp); | |
309 | } | |
7f57883e DS |
310 | } |
311 | ||
312 | /* | |
313 | * Function used in hook for acces-list | |
314 | */ | |
d62a17ae | 315 | void eigrp_distribute_update_all_wrapper(struct access_list *notused) |
7f57883e | 316 | { |
d62a17ae | 317 | eigrp_distribute_update_all(NULL); |
7f57883e DS |
318 | } |
319 | ||
320 | /* | |
321 | * @fn eigrp_distribute_timer_process | |
322 | * | |
f9e5c9ca | 323 | * @param[in] thread current execution thread timer is associated with |
7f57883e | 324 | * |
f9e5c9ca | 325 | * @return int always returns 0 |
7f57883e DS |
326 | * |
327 | * @par | |
328 | * Called when 10sec waiting time expire and | |
329 | * executes Graceful restart for whole process | |
330 | */ | |
d62a17ae | 331 | int eigrp_distribute_timer_process(struct thread *thread) |
7f57883e | 332 | { |
d62a17ae | 333 | struct eigrp *eigrp; |
7f57883e | 334 | |
d62a17ae | 335 | eigrp = THREAD_ARG(thread); |
336 | eigrp->t_distribute = NULL; | |
7f57883e | 337 | |
d62a17ae | 338 | /* execute GR for whole process */ |
339 | eigrp_update_send_process_GR(eigrp, EIGRP_GR_FILTER, NULL); | |
7f57883e | 340 | |
d62a17ae | 341 | return 0; |
7f57883e DS |
342 | } |
343 | ||
344 | /* | |
345 | * @fn eigrp_distribute_timer_interface | |
346 | * | |
f9e5c9ca | 347 | * @param[in] thread current execution thread timer is associated with |
7f57883e | 348 | * |
f9e5c9ca | 349 | * @return int always returns 0 |
7f57883e DS |
350 | * |
351 | * @par | |
352 | * Called when 10sec waiting time expire and | |
353 | * executes Graceful restart for interface | |
354 | */ | |
d62a17ae | 355 | int eigrp_distribute_timer_interface(struct thread *thread) |
7f57883e | 356 | { |
d62a17ae | 357 | struct eigrp_interface *ei; |
7f57883e | 358 | |
d62a17ae | 359 | ei = THREAD_ARG(thread); |
360 | ei->t_distribute = NULL; | |
7f57883e | 361 | |
d62a17ae | 362 | /* execute GR for interface */ |
363 | eigrp_update_send_interface_GR(ei, EIGRP_GR_FILTER, NULL); | |
7f57883e | 364 | |
d62a17ae | 365 | return 0; |
7f57883e | 366 | } |