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6250610a | 1 | /* |
896014f4 DL |
2 | * PIM for Quagga: add the ability to configure multicast static routes |
3 | * Copyright (C) 2014 Nathan Bahr, ATCorp | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; see the file COPYING; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
6250610a | 19 | |
f91f89bc DS |
20 | #include <zebra.h> |
21 | ||
22 | #include "vty.h" | |
744d91b3 | 23 | #include "if.h" |
9867746a DS |
24 | #include "log.h" |
25 | #include "memory.h" | |
26 | #include "linklist.h" | |
f91f89bc | 27 | |
9867746a DS |
28 | #include "pimd.h" |
29 | #include "pim_oil.h" | |
6250610a JAG |
30 | #include "pim_static.h" |
31 | #include "pim_time.h" | |
32 | #include "pim_str.h" | |
6250610a | 33 | #include "pim_iface.h" |
6250610a JAG |
34 | |
35 | void pim_static_route_free(struct static_route *s_route) | |
36 | { | |
d62a17ae | 37 | XFREE(MTYPE_PIM_STATIC_ROUTE, s_route); |
6250610a JAG |
38 | } |
39 | ||
4d762f26 | 40 | static struct static_route *static_route_alloc(void) |
6250610a | 41 | { |
2b57b948 | 42 | return XCALLOC(MTYPE_PIM_STATIC_ROUTE, sizeof(struct static_route)); |
6250610a JAG |
43 | } |
44 | ||
9981117a | 45 | static struct static_route *static_route_new(ifindex_t iif, ifindex_t oif, |
d62a17ae | 46 | struct in_addr group, |
47 | struct in_addr source) | |
6250610a | 48 | { |
d62a17ae | 49 | struct static_route *s_route; |
50 | s_route = static_route_alloc(); | |
d62a17ae | 51 | |
52 | s_route->group = group; | |
53 | s_route->source = source; | |
54 | s_route->iif = iif; | |
55 | s_route->oif_ttls[oif] = 1; | |
56 | s_route->c_oil.oil_ref_count = 1; | |
57 | s_route->c_oil.oil.mfcc_origin = source; | |
58 | s_route->c_oil.oil.mfcc_mcastgrp = group; | |
59 | s_route->c_oil.oil.mfcc_parent = iif; | |
60 | s_route->c_oil.oil.mfcc_ttls[oif] = 1; | |
61 | s_route->c_oil.oif_creation[oif] = pim_time_monotonic_sec(); | |
62 | ||
63 | return s_route; | |
6250610a JAG |
64 | } |
65 | ||
66 | ||
4e0bc0f0 DS |
67 | int pim_static_add(struct pim_instance *pim, struct interface *iif, |
68 | struct interface *oif, struct in_addr group, | |
69 | struct in_addr source) | |
6250610a | 70 | { |
d62a17ae | 71 | struct listnode *node = NULL; |
72 | struct static_route *s_route = NULL; | |
73 | struct static_route *original_s_route = NULL; | |
74 | struct pim_interface *pim_iif = iif ? iif->info : NULL; | |
75 | struct pim_interface *pim_oif = oif ? oif->info : NULL; | |
76 | ifindex_t iif_index = pim_iif ? pim_iif->mroute_vif_index : 0; | |
77 | ifindex_t oif_index = pim_oif ? pim_oif->mroute_vif_index : 0; | |
78 | ||
04b6c83d | 79 | if (!iif_index || !oif_index || iif_index == -1 || oif_index == -1) { |
d62a17ae | 80 | zlog_warn( |
81 | "%s %s: Unable to add static route: Invalid interface index(iif=%d,oif=%d)", | |
82 | __FILE__, __PRETTY_FUNCTION__, iif_index, oif_index); | |
83 | return -2; | |
84 | } | |
6250610a JAG |
85 | |
86 | #ifdef PIM_ENFORCE_LOOPFREE_MFC | |
d62a17ae | 87 | if (iif_index == oif_index) { |
88 | /* looped MFC entry */ | |
89 | zlog_warn( | |
90 | "%s %s: Unable to add static route: Looped MFC entry(iif=%d,oif=%d)", | |
91 | __FILE__, __PRETTY_FUNCTION__, iif_index, oif_index); | |
92 | return -4; | |
93 | } | |
6250610a | 94 | #endif |
72ec4672 DS |
95 | if (iif->vrf_id != oif->vrf_id) { |
96 | return -3; | |
97 | } | |
98 | ||
4e0bc0f0 | 99 | for (ALL_LIST_ELEMENTS_RO(pim->static_routes, node, s_route)) { |
d62a17ae | 100 | if (s_route->group.s_addr == group.s_addr |
101 | && s_route->source.s_addr == source.s_addr) { | |
102 | if (s_route->iif == iif_index | |
103 | && s_route->oif_ttls[oif_index]) { | |
104 | char gifaddr_str[INET_ADDRSTRLEN]; | |
105 | char sifaddr_str[INET_ADDRSTRLEN]; | |
106 | pim_inet4_dump("<ifaddr?>", group, gifaddr_str, | |
107 | sizeof(gifaddr_str)); | |
108 | pim_inet4_dump("<ifaddr?>", source, sifaddr_str, | |
109 | sizeof(sifaddr_str)); | |
110 | zlog_warn( | |
111 | "%s %s: Unable to add static route: Route already exists (iif=%d,oif=%d,group=%s,source=%s)", | |
112 | __FILE__, __PRETTY_FUNCTION__, | |
113 | iif_index, oif_index, gifaddr_str, | |
114 | sifaddr_str); | |
115 | return -3; | |
116 | } | |
117 | ||
118 | /* Ok, from here on out we will be making changes to the | |
119 | * s_route structure, but if | |
120 | * for some reason we fail to commit these changes to | |
121 | * the kernel, we want to be able | |
122 | * restore the state of the list. So copy the node data | |
123 | * and if need be, we can copy | |
124 | * back if it fails. | |
125 | */ | |
126 | original_s_route = static_route_alloc(); | |
d62a17ae | 127 | memcpy(original_s_route, s_route, |
128 | sizeof(struct static_route)); | |
129 | ||
130 | /* Route exists and has the same input interface, but | |
131 | * adding a new output interface */ | |
132 | if (s_route->iif == iif_index) { | |
133 | s_route->oif_ttls[oif_index] = 1; | |
134 | s_route->c_oil.oil.mfcc_ttls[oif_index] = 1; | |
135 | s_route->c_oil.oif_creation[oif_index] = | |
136 | pim_time_monotonic_sec(); | |
137 | ++s_route->c_oil.oil_ref_count; | |
138 | } else { | |
139 | /* input interface changed */ | |
140 | s_route->iif = iif_index; | |
7984af18 | 141 | pim_static_mroute_iif_update(&s_route->c_oil, |
afb2f470 DS |
142 | iif_index, |
143 | __PRETTY_FUNCTION__); | |
6250610a JAG |
144 | |
145 | #ifdef PIM_ENFORCE_LOOPFREE_MFC | |
d62a17ae | 146 | /* check to make sure the new input was not an |
147 | * old output */ | |
148 | if (s_route->oif_ttls[iif_index]) { | |
149 | s_route->oif_ttls[iif_index] = 0; | |
150 | s_route->c_oil.oif_creation[iif_index] = | |
151 | 0; | |
152 | s_route->c_oil.oil | |
153 | .mfcc_ttls[iif_index] = 0; | |
154 | --s_route->c_oil.oil_ref_count; | |
155 | } | |
6250610a JAG |
156 | #endif |
157 | ||
d62a17ae | 158 | /* now add the new output, if it is new */ |
159 | if (!s_route->oif_ttls[oif_index]) { | |
160 | s_route->oif_ttls[oif_index] = 1; | |
161 | s_route->c_oil.oif_creation[oif_index] = | |
162 | pim_time_monotonic_sec(); | |
163 | s_route->c_oil.oil | |
164 | .mfcc_ttls[oif_index] = 1; | |
165 | ++s_route->c_oil.oil_ref_count; | |
166 | } | |
167 | } | |
168 | ||
169 | break; | |
170 | } | |
171 | } | |
172 | ||
173 | /* If node is null then we reached the end of the list without finding a | |
174 | * match */ | |
175 | if (!node) { | |
176 | s_route = static_route_new(iif_index, oif_index, group, source); | |
4e0bc0f0 | 177 | listnode_add(pim->static_routes, s_route); |
d62a17ae | 178 | } |
179 | ||
2e4e8571 DS |
180 | s_route->c_oil.pim = pim; |
181 | ||
69e3538c | 182 | if (pim_static_mroute_add(&s_route->c_oil, __PRETTY_FUNCTION__)) { |
d62a17ae | 183 | char gifaddr_str[INET_ADDRSTRLEN]; |
184 | char sifaddr_str[INET_ADDRSTRLEN]; | |
185 | pim_inet4_dump("<ifaddr?>", group, gifaddr_str, | |
186 | sizeof(gifaddr_str)); | |
187 | pim_inet4_dump("<ifaddr?>", source, sifaddr_str, | |
188 | sizeof(sifaddr_str)); | |
189 | zlog_warn( | |
190 | "%s %s: Unable to add static route(iif=%d,oif=%d,group=%s,source=%s)", | |
191 | __FILE__, __PRETTY_FUNCTION__, iif_index, oif_index, | |
192 | gifaddr_str, sifaddr_str); | |
193 | ||
194 | /* Need to put s_route back to the way it was */ | |
195 | if (original_s_route) { | |
196 | memcpy(s_route, original_s_route, | |
197 | sizeof(struct static_route)); | |
198 | } else { | |
199 | /* we never stored off a copy, so it must have been a | |
200 | * fresh new route */ | |
4e0bc0f0 | 201 | listnode_delete(pim->static_routes, s_route); |
d62a17ae | 202 | pim_static_route_free(s_route); |
203 | } | |
204 | ||
205 | if (original_s_route) { | |
206 | pim_static_route_free(original_s_route); | |
207 | } | |
208 | ||
209 | return -1; | |
210 | } | |
211 | ||
212 | /* Make sure we free the memory for the route copy if used */ | |
213 | if (original_s_route) { | |
214 | pim_static_route_free(original_s_route); | |
215 | } | |
216 | ||
217 | if (PIM_DEBUG_STATIC) { | |
218 | char gifaddr_str[INET_ADDRSTRLEN]; | |
219 | char sifaddr_str[INET_ADDRSTRLEN]; | |
220 | pim_inet4_dump("<ifaddr?>", group, gifaddr_str, | |
221 | sizeof(gifaddr_str)); | |
222 | pim_inet4_dump("<ifaddr?>", source, sifaddr_str, | |
223 | sizeof(sifaddr_str)); | |
224 | zlog_debug( | |
225 | "%s: Static route added(iif=%d,oif=%d,group=%s,source=%s)", | |
226 | __PRETTY_FUNCTION__, iif_index, oif_index, gifaddr_str, | |
227 | sifaddr_str); | |
228 | } | |
229 | ||
230 | return 0; | |
6250610a JAG |
231 | } |
232 | ||
4e0bc0f0 DS |
233 | int pim_static_del(struct pim_instance *pim, struct interface *iif, |
234 | struct interface *oif, struct in_addr group, | |
235 | struct in_addr source) | |
6250610a | 236 | { |
d62a17ae | 237 | struct listnode *node = NULL; |
238 | struct listnode *nextnode = NULL; | |
239 | struct static_route *s_route = NULL; | |
240 | struct pim_interface *pim_iif = iif ? iif->info : 0; | |
241 | struct pim_interface *pim_oif = oif ? oif->info : 0; | |
242 | ifindex_t iif_index = pim_iif ? pim_iif->mroute_vif_index : 0; | |
243 | ifindex_t oif_index = pim_oif ? pim_oif->mroute_vif_index : 0; | |
244 | ||
245 | if (!iif_index || !oif_index) { | |
246 | zlog_warn( | |
247 | "%s %s: Unable to remove static route: Invalid interface index(iif=%d,oif=%d)", | |
248 | __FILE__, __PRETTY_FUNCTION__, iif_index, oif_index); | |
249 | return -2; | |
250 | } | |
251 | ||
4e0bc0f0 | 252 | for (ALL_LIST_ELEMENTS(pim->static_routes, node, nextnode, s_route)) { |
d62a17ae | 253 | if (s_route->iif == iif_index |
254 | && s_route->group.s_addr == group.s_addr | |
255 | && s_route->source.s_addr == source.s_addr | |
256 | && s_route->oif_ttls[oif_index]) { | |
257 | s_route->oif_ttls[oif_index] = 0; | |
258 | s_route->c_oil.oil.mfcc_ttls[oif_index] = 0; | |
259 | --s_route->c_oil.oil_ref_count; | |
260 | ||
261 | /* If there are no more outputs then delete the whole | |
262 | * route, otherwise set the route with the new outputs | |
263 | */ | |
264 | if (s_route->c_oil.oil_ref_count <= 0 | |
265 | ? pim_mroute_del(&s_route->c_oil, | |
266 | __PRETTY_FUNCTION__) | |
69e3538c | 267 | : pim_static_mroute_add(&s_route->c_oil, |
d62a17ae | 268 | __PRETTY_FUNCTION__)) { |
269 | char gifaddr_str[INET_ADDRSTRLEN]; | |
270 | char sifaddr_str[INET_ADDRSTRLEN]; | |
271 | pim_inet4_dump("<ifaddr?>", group, gifaddr_str, | |
272 | sizeof(gifaddr_str)); | |
273 | pim_inet4_dump("<ifaddr?>", source, sifaddr_str, | |
274 | sizeof(sifaddr_str)); | |
275 | zlog_warn( | |
276 | "%s %s: Unable to remove static route(iif=%d,oif=%d,group=%s,source=%s)", | |
277 | __FILE__, __PRETTY_FUNCTION__, | |
278 | iif_index, oif_index, gifaddr_str, | |
279 | sifaddr_str); | |
280 | ||
281 | s_route->oif_ttls[oif_index] = 1; | |
282 | s_route->c_oil.oil.mfcc_ttls[oif_index] = 1; | |
283 | ++s_route->c_oil.oil_ref_count; | |
284 | ||
285 | return -1; | |
286 | } | |
287 | ||
288 | s_route->c_oil.oif_creation[oif_index] = 0; | |
289 | ||
290 | if (s_route->c_oil.oil_ref_count <= 0) { | |
4e0bc0f0 | 291 | listnode_delete(pim->static_routes, s_route); |
d62a17ae | 292 | pim_static_route_free(s_route); |
293 | } | |
294 | ||
295 | if (PIM_DEBUG_STATIC) { | |
296 | char gifaddr_str[INET_ADDRSTRLEN]; | |
297 | char sifaddr_str[INET_ADDRSTRLEN]; | |
298 | pim_inet4_dump("<ifaddr?>", group, gifaddr_str, | |
299 | sizeof(gifaddr_str)); | |
300 | pim_inet4_dump("<ifaddr?>", source, sifaddr_str, | |
301 | sizeof(sifaddr_str)); | |
302 | zlog_debug( | |
303 | "%s: Static route removed(iif=%d,oif=%d,group=%s,source=%s)", | |
304 | __PRETTY_FUNCTION__, iif_index, | |
305 | oif_index, gifaddr_str, sifaddr_str); | |
306 | } | |
307 | ||
308 | break; | |
309 | } | |
310 | } | |
311 | ||
312 | if (!node) { | |
313 | char gifaddr_str[INET_ADDRSTRLEN]; | |
314 | char sifaddr_str[INET_ADDRSTRLEN]; | |
315 | pim_inet4_dump("<ifaddr?>", group, gifaddr_str, | |
316 | sizeof(gifaddr_str)); | |
317 | pim_inet4_dump("<ifaddr?>", source, sifaddr_str, | |
318 | sizeof(sifaddr_str)); | |
319 | zlog_warn( | |
320 | "%s %s: Unable to remove static route: Route does not exist(iif=%d,oif=%d,group=%s,source=%s)", | |
321 | __FILE__, __PRETTY_FUNCTION__, iif_index, oif_index, | |
322 | gifaddr_str, sifaddr_str); | |
323 | return -3; | |
324 | } | |
325 | ||
326 | return 0; | |
6250610a | 327 | } |
f91f89bc | 328 | |
64c86530 | 329 | int pim_static_write_mroute(struct pim_instance *pim, struct vty *vty, |
4e0bc0f0 | 330 | struct interface *ifp) |
f91f89bc | 331 | { |
d62a17ae | 332 | struct pim_interface *pim_ifp = ifp->info; |
333 | struct listnode *node; | |
334 | struct static_route *sroute; | |
335 | int count = 0; | |
336 | char sbuf[INET_ADDRSTRLEN]; | |
337 | char gbuf[INET_ADDRSTRLEN]; | |
338 | ||
339 | if (!pim_ifp) | |
340 | return 0; | |
341 | ||
4e0bc0f0 | 342 | for (ALL_LIST_ELEMENTS_RO(pim->static_routes, node, sroute)) { |
d62a17ae | 343 | pim_inet4_dump("<ifaddr?>", sroute->group, gbuf, sizeof(gbuf)); |
344 | pim_inet4_dump("<ifaddr?>", sroute->source, sbuf, sizeof(sbuf)); | |
345 | if (sroute->iif == pim_ifp->mroute_vif_index) { | |
346 | int i; | |
347 | for (i = 0; i < MAXVIFS; i++) | |
348 | if (sroute->oif_ttls[i]) { | |
349 | struct interface *oifp = | |
7cfc7bcf DS |
350 | pim_if_find_by_vif_index(pim, |
351 | i); | |
d62a17ae | 352 | if (sroute->source.s_addr == 0) |
353 | vty_out(vty, | |
354 | " ip mroute %s %s\n", | |
355 | oifp->name, gbuf); | |
356 | else | |
357 | vty_out(vty, | |
358 | " ip mroute %s %s %s\n", | |
359 | oifp->name, gbuf, sbuf); | |
360 | count++; | |
361 | } | |
362 | } | |
363 | } | |
364 | ||
365 | return count; | |
f91f89bc | 366 | } |