]>
git.proxmox.com Git - mirror_frr.git/blob - pimd/pim_static.c
2 * PIM for Quagga: add the ability to configure multicast static routes
3 * Copyright (C) 2014 Nathan Bahr, ATCorp
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.
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.
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
30 #include "pim_static.h"
33 #include "pim_iface.h"
35 void pim_static_route_free(struct static_route
*s_route
)
37 XFREE(MTYPE_PIM_STATIC_ROUTE
, s_route
);
40 static struct static_route
*static_route_alloc(void)
42 return XCALLOC(MTYPE_PIM_STATIC_ROUTE
, sizeof(struct static_route
));
45 static struct static_route
*static_route_new(ifindex_t iif
, ifindex_t oif
,
47 struct in_addr source
)
49 struct static_route
*s_route
;
50 s_route
= static_route_alloc();
52 s_route
->group
= group
;
53 s_route
->source
= source
;
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();
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
)
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;
79 if (!iif_index
|| !oif_index
|| iif_index
== -1 || oif_index
== -1) {
81 "%s %s: Unable to add static route: Invalid interface index(iif=%d,oif=%d)",
82 __FILE__
, __PRETTY_FUNCTION__
, iif_index
, oif_index
);
86 #ifdef PIM_ENFORCE_LOOPFREE_MFC
87 if (iif_index
== oif_index
) {
88 /* looped MFC entry */
90 "%s %s: Unable to add static route: Looped MFC entry(iif=%d,oif=%d)",
91 __FILE__
, __PRETTY_FUNCTION__
, iif_index
, oif_index
);
95 if (iif
->vrf_id
!= oif
->vrf_id
) {
99 for (ALL_LIST_ELEMENTS_RO(pim
->static_routes
, node
, s_route
)) {
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
));
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
,
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
126 original_s_route
= static_route_alloc();
127 memcpy(original_s_route
, s_route
,
128 sizeof(struct static_route
));
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
;
139 /* input interface changed */
140 s_route
->iif
= iif_index
;
141 s_route
->c_oil
.oil
.mfcc_parent
= iif_index
;
143 #ifdef PIM_ENFORCE_LOOPFREE_MFC
144 /* check to make sure the new input was not an
146 if (s_route
->oif_ttls
[iif_index
]) {
147 s_route
->oif_ttls
[iif_index
] = 0;
148 s_route
->c_oil
.oif_creation
[iif_index
] =
151 .mfcc_ttls
[iif_index
] = 0;
152 --s_route
->c_oil
.oil_ref_count
;
156 /* now add the new output, if it is new */
157 if (!s_route
->oif_ttls
[oif_index
]) {
158 s_route
->oif_ttls
[oif_index
] = 1;
159 s_route
->c_oil
.oif_creation
[oif_index
] =
160 pim_time_monotonic_sec();
162 .mfcc_ttls
[oif_index
] = 1;
163 ++s_route
->c_oil
.oil_ref_count
;
171 /* If node is null then we reached the end of the list without finding a
174 s_route
= static_route_new(iif_index
, oif_index
, group
, source
);
175 listnode_add(pim
->static_routes
, s_route
);
178 s_route
->c_oil
.pim
= pim
;
180 if (pim_mroute_add(&s_route
->c_oil
, __PRETTY_FUNCTION__
)) {
181 char gifaddr_str
[INET_ADDRSTRLEN
];
182 char sifaddr_str
[INET_ADDRSTRLEN
];
183 pim_inet4_dump("<ifaddr?>", group
, gifaddr_str
,
184 sizeof(gifaddr_str
));
185 pim_inet4_dump("<ifaddr?>", source
, sifaddr_str
,
186 sizeof(sifaddr_str
));
188 "%s %s: Unable to add static route(iif=%d,oif=%d,group=%s,source=%s)",
189 __FILE__
, __PRETTY_FUNCTION__
, iif_index
, oif_index
,
190 gifaddr_str
, sifaddr_str
);
192 /* Need to put s_route back to the way it was */
193 if (original_s_route
) {
194 memcpy(s_route
, original_s_route
,
195 sizeof(struct static_route
));
197 /* we never stored off a copy, so it must have been a
199 listnode_delete(pim
->static_routes
, s_route
);
200 pim_static_route_free(s_route
);
203 if (original_s_route
) {
204 pim_static_route_free(original_s_route
);
210 /* Make sure we free the memory for the route copy if used */
211 if (original_s_route
) {
212 pim_static_route_free(original_s_route
);
215 if (PIM_DEBUG_STATIC
) {
216 char gifaddr_str
[INET_ADDRSTRLEN
];
217 char sifaddr_str
[INET_ADDRSTRLEN
];
218 pim_inet4_dump("<ifaddr?>", group
, gifaddr_str
,
219 sizeof(gifaddr_str
));
220 pim_inet4_dump("<ifaddr?>", source
, sifaddr_str
,
221 sizeof(sifaddr_str
));
223 "%s: Static route added(iif=%d,oif=%d,group=%s,source=%s)",
224 __PRETTY_FUNCTION__
, iif_index
, oif_index
, gifaddr_str
,
231 int pim_static_del(struct pim_instance
*pim
, struct interface
*iif
,
232 struct interface
*oif
, struct in_addr group
,
233 struct in_addr source
)
235 struct listnode
*node
= NULL
;
236 struct listnode
*nextnode
= NULL
;
237 struct static_route
*s_route
= NULL
;
238 struct pim_interface
*pim_iif
= iif
? iif
->info
: 0;
239 struct pim_interface
*pim_oif
= oif
? oif
->info
: 0;
240 ifindex_t iif_index
= pim_iif
? pim_iif
->mroute_vif_index
: 0;
241 ifindex_t oif_index
= pim_oif
? pim_oif
->mroute_vif_index
: 0;
243 if (!iif_index
|| !oif_index
) {
245 "%s %s: Unable to remove static route: Invalid interface index(iif=%d,oif=%d)",
246 __FILE__
, __PRETTY_FUNCTION__
, iif_index
, oif_index
);
250 for (ALL_LIST_ELEMENTS(pim
->static_routes
, node
, nextnode
, s_route
)) {
251 if (s_route
->iif
== iif_index
252 && s_route
->group
.s_addr
== group
.s_addr
253 && s_route
->source
.s_addr
== source
.s_addr
254 && s_route
->oif_ttls
[oif_index
]) {
255 s_route
->oif_ttls
[oif_index
] = 0;
256 s_route
->c_oil
.oil
.mfcc_ttls
[oif_index
] = 0;
257 --s_route
->c_oil
.oil_ref_count
;
259 /* If there are no more outputs then delete the whole
260 * route, otherwise set the route with the new outputs
262 if (s_route
->c_oil
.oil_ref_count
<= 0
263 ? pim_mroute_del(&s_route
->c_oil
,
265 : pim_mroute_add(&s_route
->c_oil
,
266 __PRETTY_FUNCTION__
)) {
267 char gifaddr_str
[INET_ADDRSTRLEN
];
268 char sifaddr_str
[INET_ADDRSTRLEN
];
269 pim_inet4_dump("<ifaddr?>", group
, gifaddr_str
,
270 sizeof(gifaddr_str
));
271 pim_inet4_dump("<ifaddr?>", source
, sifaddr_str
,
272 sizeof(sifaddr_str
));
274 "%s %s: Unable to remove static route(iif=%d,oif=%d,group=%s,source=%s)",
275 __FILE__
, __PRETTY_FUNCTION__
,
276 iif_index
, oif_index
, gifaddr_str
,
279 s_route
->oif_ttls
[oif_index
] = 1;
280 s_route
->c_oil
.oil
.mfcc_ttls
[oif_index
] = 1;
281 ++s_route
->c_oil
.oil_ref_count
;
286 s_route
->c_oil
.oif_creation
[oif_index
] = 0;
288 if (s_route
->c_oil
.oil_ref_count
<= 0) {
289 listnode_delete(pim
->static_routes
, s_route
);
290 pim_static_route_free(s_route
);
293 if (PIM_DEBUG_STATIC
) {
294 char gifaddr_str
[INET_ADDRSTRLEN
];
295 char sifaddr_str
[INET_ADDRSTRLEN
];
296 pim_inet4_dump("<ifaddr?>", group
, gifaddr_str
,
297 sizeof(gifaddr_str
));
298 pim_inet4_dump("<ifaddr?>", source
, sifaddr_str
,
299 sizeof(sifaddr_str
));
301 "%s: Static route removed(iif=%d,oif=%d,group=%s,source=%s)",
302 __PRETTY_FUNCTION__
, iif_index
,
303 oif_index
, gifaddr_str
, sifaddr_str
);
311 char gifaddr_str
[INET_ADDRSTRLEN
];
312 char sifaddr_str
[INET_ADDRSTRLEN
];
313 pim_inet4_dump("<ifaddr?>", group
, gifaddr_str
,
314 sizeof(gifaddr_str
));
315 pim_inet4_dump("<ifaddr?>", source
, sifaddr_str
,
316 sizeof(sifaddr_str
));
318 "%s %s: Unable to remove static route: Route does not exist(iif=%d,oif=%d,group=%s,source=%s)",
319 __FILE__
, __PRETTY_FUNCTION__
, iif_index
, oif_index
,
320 gifaddr_str
, sifaddr_str
);
327 int pim_static_write_mroute(struct pim_instance
*pim
, struct vty
*vty
,
328 struct interface
*ifp
)
330 struct pim_interface
*pim_ifp
= ifp
->info
;
331 struct listnode
*node
;
332 struct static_route
*sroute
;
334 char sbuf
[INET_ADDRSTRLEN
];
335 char gbuf
[INET_ADDRSTRLEN
];
340 for (ALL_LIST_ELEMENTS_RO(pim
->static_routes
, node
, sroute
)) {
341 pim_inet4_dump("<ifaddr?>", sroute
->group
, gbuf
, sizeof(gbuf
));
342 pim_inet4_dump("<ifaddr?>", sroute
->source
, sbuf
, sizeof(sbuf
));
343 if (sroute
->iif
== pim_ifp
->mroute_vif_index
) {
345 for (i
= 0; i
< MAXVIFS
; i
++)
346 if (sroute
->oif_ttls
[i
]) {
347 struct interface
*oifp
=
348 pim_if_find_by_vif_index(pim
,
350 if (sroute
->source
.s_addr
== 0)
352 " ip mroute %s %s\n",
356 " ip mroute %s %s %s\n",
357 oifp
->name
, gbuf
, sbuf
);