]>
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 if (!original_s_route
) {
130 memcpy(original_s_route
, s_route
,
131 sizeof(struct static_route
));
133 /* Route exists and has the same input interface, but
134 * adding a new output interface */
135 if (s_route
->iif
== iif_index
) {
136 s_route
->oif_ttls
[oif_index
] = 1;
137 s_route
->c_oil
.oil
.mfcc_ttls
[oif_index
] = 1;
138 s_route
->c_oil
.oif_creation
[oif_index
] =
139 pim_time_monotonic_sec();
140 ++s_route
->c_oil
.oil_ref_count
;
142 /* input interface changed */
143 s_route
->iif
= iif_index
;
144 s_route
->c_oil
.oil
.mfcc_parent
= iif_index
;
146 #ifdef PIM_ENFORCE_LOOPFREE_MFC
147 /* check to make sure the new input was not an
149 if (s_route
->oif_ttls
[iif_index
]) {
150 s_route
->oif_ttls
[iif_index
] = 0;
151 s_route
->c_oil
.oif_creation
[iif_index
] =
154 .mfcc_ttls
[iif_index
] = 0;
155 --s_route
->c_oil
.oil_ref_count
;
159 /* now add the new output, if it is new */
160 if (!s_route
->oif_ttls
[oif_index
]) {
161 s_route
->oif_ttls
[oif_index
] = 1;
162 s_route
->c_oil
.oif_creation
[oif_index
] =
163 pim_time_monotonic_sec();
165 .mfcc_ttls
[oif_index
] = 1;
166 ++s_route
->c_oil
.oil_ref_count
;
174 /* If node is null then we reached the end of the list without finding a
177 s_route
= static_route_new(iif_index
, oif_index
, group
, source
);
178 listnode_add(pim
->static_routes
, s_route
);
181 s_route
->c_oil
.pim
= pim
;
183 if (pim_mroute_add(&s_route
->c_oil
, __PRETTY_FUNCTION__
)) {
184 char gifaddr_str
[INET_ADDRSTRLEN
];
185 char sifaddr_str
[INET_ADDRSTRLEN
];
186 pim_inet4_dump("<ifaddr?>", group
, gifaddr_str
,
187 sizeof(gifaddr_str
));
188 pim_inet4_dump("<ifaddr?>", source
, sifaddr_str
,
189 sizeof(sifaddr_str
));
191 "%s %s: Unable to add static route(iif=%d,oif=%d,group=%s,source=%s)",
192 __FILE__
, __PRETTY_FUNCTION__
, iif_index
, oif_index
,
193 gifaddr_str
, sifaddr_str
);
195 /* Need to put s_route back to the way it was */
196 if (original_s_route
) {
197 memcpy(s_route
, original_s_route
,
198 sizeof(struct static_route
));
200 /* we never stored off a copy, so it must have been a
202 listnode_delete(pim
->static_routes
, s_route
);
203 pim_static_route_free(s_route
);
206 if (original_s_route
) {
207 pim_static_route_free(original_s_route
);
213 /* Make sure we free the memory for the route copy if used */
214 if (original_s_route
) {
215 pim_static_route_free(original_s_route
);
218 if (PIM_DEBUG_STATIC
) {
219 char gifaddr_str
[INET_ADDRSTRLEN
];
220 char sifaddr_str
[INET_ADDRSTRLEN
];
221 pim_inet4_dump("<ifaddr?>", group
, gifaddr_str
,
222 sizeof(gifaddr_str
));
223 pim_inet4_dump("<ifaddr?>", source
, sifaddr_str
,
224 sizeof(sifaddr_str
));
226 "%s: Static route added(iif=%d,oif=%d,group=%s,source=%s)",
227 __PRETTY_FUNCTION__
, iif_index
, oif_index
, gifaddr_str
,
234 int pim_static_del(struct pim_instance
*pim
, struct interface
*iif
,
235 struct interface
*oif
, struct in_addr group
,
236 struct in_addr source
)
238 struct listnode
*node
= NULL
;
239 struct listnode
*nextnode
= NULL
;
240 struct static_route
*s_route
= NULL
;
241 struct pim_interface
*pim_iif
= iif
? iif
->info
: 0;
242 struct pim_interface
*pim_oif
= oif
? oif
->info
: 0;
243 ifindex_t iif_index
= pim_iif
? pim_iif
->mroute_vif_index
: 0;
244 ifindex_t oif_index
= pim_oif
? pim_oif
->mroute_vif_index
: 0;
246 if (!iif_index
|| !oif_index
) {
248 "%s %s: Unable to remove static route: Invalid interface index(iif=%d,oif=%d)",
249 __FILE__
, __PRETTY_FUNCTION__
, iif_index
, oif_index
);
253 for (ALL_LIST_ELEMENTS(pim
->static_routes
, node
, nextnode
, s_route
)) {
254 if (s_route
->iif
== iif_index
255 && s_route
->group
.s_addr
== group
.s_addr
256 && s_route
->source
.s_addr
== source
.s_addr
257 && s_route
->oif_ttls
[oif_index
]) {
258 s_route
->oif_ttls
[oif_index
] = 0;
259 s_route
->c_oil
.oil
.mfcc_ttls
[oif_index
] = 0;
260 --s_route
->c_oil
.oil_ref_count
;
262 /* If there are no more outputs then delete the whole
263 * route, otherwise set the route with the new outputs
265 if (s_route
->c_oil
.oil_ref_count
<= 0
266 ? pim_mroute_del(&s_route
->c_oil
,
268 : pim_mroute_add(&s_route
->c_oil
,
269 __PRETTY_FUNCTION__
)) {
270 char gifaddr_str
[INET_ADDRSTRLEN
];
271 char sifaddr_str
[INET_ADDRSTRLEN
];
272 pim_inet4_dump("<ifaddr?>", group
, gifaddr_str
,
273 sizeof(gifaddr_str
));
274 pim_inet4_dump("<ifaddr?>", source
, sifaddr_str
,
275 sizeof(sifaddr_str
));
277 "%s %s: Unable to remove static route(iif=%d,oif=%d,group=%s,source=%s)",
278 __FILE__
, __PRETTY_FUNCTION__
,
279 iif_index
, oif_index
, gifaddr_str
,
282 s_route
->oif_ttls
[oif_index
] = 1;
283 s_route
->c_oil
.oil
.mfcc_ttls
[oif_index
] = 1;
284 ++s_route
->c_oil
.oil_ref_count
;
289 s_route
->c_oil
.oif_creation
[oif_index
] = 0;
291 if (s_route
->c_oil
.oil_ref_count
<= 0) {
292 listnode_delete(pim
->static_routes
, s_route
);
293 pim_static_route_free(s_route
);
296 if (PIM_DEBUG_STATIC
) {
297 char gifaddr_str
[INET_ADDRSTRLEN
];
298 char sifaddr_str
[INET_ADDRSTRLEN
];
299 pim_inet4_dump("<ifaddr?>", group
, gifaddr_str
,
300 sizeof(gifaddr_str
));
301 pim_inet4_dump("<ifaddr?>", source
, sifaddr_str
,
302 sizeof(sifaddr_str
));
304 "%s: Static route removed(iif=%d,oif=%d,group=%s,source=%s)",
305 __PRETTY_FUNCTION__
, iif_index
,
306 oif_index
, gifaddr_str
, sifaddr_str
);
314 char gifaddr_str
[INET_ADDRSTRLEN
];
315 char sifaddr_str
[INET_ADDRSTRLEN
];
316 pim_inet4_dump("<ifaddr?>", group
, gifaddr_str
,
317 sizeof(gifaddr_str
));
318 pim_inet4_dump("<ifaddr?>", source
, sifaddr_str
,
319 sizeof(sifaddr_str
));
321 "%s %s: Unable to remove static route: Route does not exist(iif=%d,oif=%d,group=%s,source=%s)",
322 __FILE__
, __PRETTY_FUNCTION__
, iif_index
, oif_index
,
323 gifaddr_str
, sifaddr_str
);
330 int pim_static_write_mroute(struct pim_instance
*pim
, struct vty
*vty
,
331 struct interface
*ifp
)
333 struct pim_interface
*pim_ifp
= ifp
->info
;
334 struct listnode
*node
;
335 struct static_route
*sroute
;
337 char sbuf
[INET_ADDRSTRLEN
];
338 char gbuf
[INET_ADDRSTRLEN
];
343 for (ALL_LIST_ELEMENTS_RO(pim
->static_routes
, node
, sroute
)) {
344 pim_inet4_dump("<ifaddr?>", sroute
->group
, gbuf
, sizeof(gbuf
));
345 pim_inet4_dump("<ifaddr?>", sroute
->source
, sbuf
, sizeof(sbuf
));
346 if (sroute
->iif
== pim_ifp
->mroute_vif_index
) {
348 for (i
= 0; i
< MAXVIFS
; i
++)
349 if (sroute
->oif_ttls
[i
]) {
350 struct interface
*oifp
=
351 pim_if_find_by_vif_index(pim
,
353 if (sroute
->source
.s_addr
== 0)
355 " ip mroute %s %s\n",
359 " ip mroute %s %s %s\n",
360 oifp
->name
, gbuf
, sbuf
);