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6250610a JAG |
1 | /* |
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 | |
16 | along with this program; see the file COPYING; if not, write to the | |
17 | Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, | |
18 | MA 02110-1301 USA | |
19 | ||
20 | $QuaggaId: $Format:%an, %ai, %h$ $ | |
21 | */ | |
22 | ||
f91f89bc DS |
23 | #include <zebra.h> |
24 | ||
25 | #include "vty.h" | |
744d91b3 | 26 | #include "if.h" |
9867746a DS |
27 | #include "log.h" |
28 | #include "memory.h" | |
29 | #include "linklist.h" | |
f91f89bc | 30 | |
9867746a DS |
31 | #include "pimd.h" |
32 | #include "pim_oil.h" | |
6250610a JAG |
33 | #include "pim_static.h" |
34 | #include "pim_time.h" | |
35 | #include "pim_str.h" | |
6250610a | 36 | #include "pim_iface.h" |
6250610a JAG |
37 | |
38 | void pim_static_route_free(struct static_route *s_route) | |
39 | { | |
40 | XFREE(MTYPE_PIM_STATIC_ROUTE, s_route); | |
41 | } | |
42 | ||
43 | static struct static_route * static_route_alloc() | |
44 | { | |
45 | struct static_route *s_route; | |
46 | ||
47 | s_route = XCALLOC(MTYPE_PIM_STATIC_ROUTE, sizeof(*s_route)); | |
48 | if (!s_route) { | |
4d114a94 | 49 | zlog_err("PIM XCALLOC(%zu) failure", sizeof(*s_route)); |
6250610a JAG |
50 | return 0; |
51 | } | |
52 | return s_route; | |
53 | } | |
54 | ||
55 | static struct static_route *static_route_new(unsigned int iif, | |
56 | unsigned int oif, | |
57 | struct in_addr group, | |
58 | struct in_addr source) | |
59 | { | |
60 | struct static_route * s_route; | |
61 | s_route = static_route_alloc(); | |
62 | if (!s_route) { | |
63 | return 0; | |
64 | } | |
65 | ||
66 | s_route->group = group; | |
67 | s_route->source = source; | |
68 | s_route->iif = iif; | |
69 | s_route->oif_ttls[oif] = 1; | |
9867746a DS |
70 | s_route->c_oil.oil_ref_count = 1; |
71 | s_route->c_oil.oil.mfcc_origin = source; | |
72 | s_route->c_oil.oil.mfcc_mcastgrp = group; | |
73 | s_route->c_oil.oil.mfcc_parent = iif; | |
74 | s_route->c_oil.oil.mfcc_ttls[oif] = 1; | |
75 | s_route->c_oil.oif_creation[oif] = pim_time_monotonic_sec(); | |
6250610a JAG |
76 | |
77 | return s_route; | |
78 | } | |
79 | ||
80 | ||
81 | int pim_static_add(struct interface *iif, struct interface *oif, struct in_addr group, struct in_addr source) | |
82 | { | |
83 | struct listnode *node = 0; | |
84 | struct static_route *s_route = 0; | |
85 | struct static_route *original_s_route = 0; | |
86 | struct pim_interface *pim_iif = iif ? iif->info : 0; | |
87 | struct pim_interface *pim_oif = oif ? oif->info : 0; | |
b892f1dd PJ |
88 | ifindex_t iif_index = pim_iif ? pim_iif->mroute_vif_index : 0; |
89 | ifindex_t oif_index = pim_oif ? pim_oif->mroute_vif_index : 0; | |
6250610a JAG |
90 | |
91 | if (!iif_index || !oif_index) { | |
92 | zlog_warn("%s %s: Unable to add static route: Invalid interface index(iif=%d,oif=%d)", | |
93 | __FILE__, __PRETTY_FUNCTION__, | |
94 | iif_index, | |
95 | oif_index); | |
96 | return -2; | |
97 | } | |
98 | ||
99 | #ifdef PIM_ENFORCE_LOOPFREE_MFC | |
100 | if (iif_index == oif_index) { | |
101 | /* looped MFC entry */ | |
102 | zlog_warn("%s %s: Unable to add static route: Looped MFC entry(iif=%d,oif=%d)", | |
103 | __FILE__, __PRETTY_FUNCTION__, | |
104 | iif_index, | |
105 | oif_index); | |
106 | return -4; | |
107 | } | |
108 | #endif | |
109 | ||
110 | for (ALL_LIST_ELEMENTS_RO(qpim_static_route_list, node, s_route)) { | |
111 | if (s_route->group.s_addr == group.s_addr && | |
112 | s_route->source.s_addr == source.s_addr) { | |
113 | if (s_route->iif == iif_index && | |
114 | s_route->oif_ttls[oif_index]) { | |
115 | char gifaddr_str[100]; | |
116 | char sifaddr_str[100]; | |
117 | pim_inet4_dump("<ifaddr?>", group, gifaddr_str, sizeof(gifaddr_str)); | |
118 | pim_inet4_dump("<ifaddr?>", source, sifaddr_str, sizeof(sifaddr_str)); | |
119 | zlog_warn("%s %s: Unable to add static route: Route already exists (iif=%d,oif=%d,group=%s,source=%s)", | |
120 | __FILE__, __PRETTY_FUNCTION__, | |
121 | iif_index, | |
122 | oif_index, | |
123 | gifaddr_str, | |
124 | sifaddr_str); | |
125 | return -3; | |
126 | } | |
127 | ||
128 | /* Ok, from here on out we will be making changes to the s_route structure, but if | |
129 | * for some reason we fail to commit these changes to the kernel, we want to be able | |
130 | * restore the state of the list. So copy the node data and if need be, we can copy | |
131 | * back if it fails. | |
132 | */ | |
133 | original_s_route = static_route_alloc(); | |
134 | if (!original_s_route) { | |
135 | return -5; | |
136 | } | |
137 | memcpy(original_s_route, s_route, sizeof(struct static_route)); | |
138 | ||
139 | /* Route exists and has the same input interface, but adding a new output interface */ | |
140 | if (s_route->iif == iif_index) { | |
141 | s_route->oif_ttls[oif_index] = 1; | |
9867746a DS |
142 | s_route->c_oil.oil.mfcc_ttls[oif_index] = 1; |
143 | s_route->c_oil.oif_creation[oif_index] = pim_time_monotonic_sec(); | |
144 | ++s_route->c_oil.oil_ref_count; | |
6250610a JAG |
145 | } else { |
146 | /* input interface changed */ | |
147 | s_route->iif = iif_index; | |
9867746a | 148 | s_route->c_oil.oil.mfcc_parent = iif_index; |
6250610a JAG |
149 | |
150 | #ifdef PIM_ENFORCE_LOOPFREE_MFC | |
151 | /* check to make sure the new input was not an old output */ | |
152 | if (s_route->oif_ttls[iif_index]) { | |
153 | s_route->oif_ttls[iif_index] = 0; | |
9867746a DS |
154 | s_route->c_oil.oif_creation[iif_index] = 0; |
155 | s_route->c_oil.oil.mfcc_ttls[iif_index] = 0; | |
156 | --s_route->c_oil.oil_ref_count; | |
6250610a JAG |
157 | } |
158 | #endif | |
159 | ||
160 | /* now add the new output, if it is new */ | |
161 | if (!s_route->oif_ttls[oif_index]) { | |
162 | s_route->oif_ttls[oif_index] = 1; | |
9867746a DS |
163 | s_route->c_oil.oif_creation[oif_index] = pim_time_monotonic_sec(); |
164 | s_route->c_oil.oil.mfcc_ttls[oif_index] = 1; | |
165 | ++s_route->c_oil.oil_ref_count; | |
6250610a JAG |
166 | } |
167 | } | |
168 | ||
169 | break; | |
170 | } | |
171 | } | |
172 | ||
173 | /* If node is null then we reached the end of the list without finding a match */ | |
174 | if (!node) { | |
175 | s_route = static_route_new(iif_index, oif_index, group, source); | |
176 | listnode_add(qpim_static_route_list, s_route); | |
177 | } | |
178 | ||
c171d6d8 | 179 | if (pim_mroute_add(&s_route->c_oil)) |
6250610a JAG |
180 | { |
181 | char gifaddr_str[100]; | |
182 | char sifaddr_str[100]; | |
183 | pim_inet4_dump("<ifaddr?>", group, gifaddr_str, sizeof(gifaddr_str)); | |
184 | pim_inet4_dump("<ifaddr?>", source, sifaddr_str, sizeof(sifaddr_str)); | |
185 | zlog_warn("%s %s: Unable to add static route(iif=%d,oif=%d,group=%s,source=%s)", | |
186 | __FILE__, __PRETTY_FUNCTION__, | |
187 | iif_index, | |
188 | oif_index, | |
189 | gifaddr_str, | |
190 | sifaddr_str); | |
191 | ||
192 | /* Need to put s_route back to the way it was */ | |
193 | if (original_s_route) { | |
194 | memcpy(s_route, original_s_route, sizeof(struct static_route)); | |
195 | } else { | |
196 | /* we never stored off a copy, so it must have been a fresh new route */ | |
197 | listnode_delete(qpim_static_route_list, s_route); | |
198 | pim_static_route_free(s_route); | |
199 | } | |
200 | ||
201 | return -1; | |
202 | } | |
203 | ||
204 | /* Make sure we free the memory for the route copy if used */ | |
205 | if (original_s_route) { | |
206 | pim_static_route_free(original_s_route); | |
207 | } | |
208 | ||
209 | if (PIM_DEBUG_STATIC) { | |
210 | char gifaddr_str[100]; | |
211 | char sifaddr_str[100]; | |
212 | pim_inet4_dump("<ifaddr?>", group, gifaddr_str, sizeof(gifaddr_str)); | |
213 | pim_inet4_dump("<ifaddr?>", source, sifaddr_str, sizeof(sifaddr_str)); | |
214 | zlog_debug("%s: Static route added(iif=%d,oif=%d,group=%s,source=%s)", | |
215 | __PRETTY_FUNCTION__, | |
216 | iif_index, | |
217 | oif_index, | |
218 | gifaddr_str, | |
219 | sifaddr_str); | |
220 | } | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
225 | int pim_static_del(struct interface *iif, struct interface *oif, struct in_addr group, struct in_addr source) | |
226 | { | |
227 | struct listnode *node = 0; | |
228 | struct listnode *nextnode = 0; | |
229 | struct static_route *s_route = 0; | |
230 | struct pim_interface *pim_iif = iif ? iif->info : 0; | |
231 | struct pim_interface *pim_oif = oif ? oif->info : 0; | |
b892f1dd PJ |
232 | ifindex_t iif_index = pim_iif ? pim_iif->mroute_vif_index : 0; |
233 | ifindex_t oif_index = pim_oif ? pim_oif->mroute_vif_index : 0; | |
6250610a JAG |
234 | |
235 | if (!iif_index || !oif_index) { | |
236 | zlog_warn("%s %s: Unable to remove static route: Invalid interface index(iif=%d,oif=%d)", | |
237 | __FILE__, __PRETTY_FUNCTION__, | |
238 | iif_index, | |
239 | oif_index); | |
240 | return -2; | |
241 | } | |
242 | ||
243 | for (ALL_LIST_ELEMENTS(qpim_static_route_list, node, nextnode, s_route)) { | |
244 | if (s_route->iif == iif_index && | |
245 | s_route->group.s_addr == group.s_addr && | |
246 | s_route->source.s_addr == source.s_addr && | |
247 | s_route->oif_ttls[oif_index]) { | |
248 | s_route->oif_ttls[oif_index] = 0; | |
9867746a DS |
249 | s_route->c_oil.oil.mfcc_ttls[oif_index] = 0; |
250 | --s_route->c_oil.oil_ref_count; | |
6250610a JAG |
251 | |
252 | /* If there are no more outputs then delete the whole route, otherwise set the route with the new outputs */ | |
9867746a | 253 | if (s_route->c_oil.oil_ref_count <= 0 ? |
c171d6d8 | 254 | pim_mroute_del(&s_route->c_oil) : pim_mroute_add(&s_route->c_oil)) { |
6250610a JAG |
255 | char gifaddr_str[100]; |
256 | char sifaddr_str[100]; | |
257 | pim_inet4_dump("<ifaddr?>", group, gifaddr_str, sizeof(gifaddr_str)); | |
258 | pim_inet4_dump("<ifaddr?>", source, sifaddr_str, sizeof(sifaddr_str)); | |
259 | zlog_warn("%s %s: Unable to remove static route(iif=%d,oif=%d,group=%s,source=%s)", | |
260 | __FILE__, __PRETTY_FUNCTION__, | |
261 | iif_index, | |
262 | oif_index, | |
263 | gifaddr_str, | |
264 | sifaddr_str); | |
265 | ||
266 | s_route->oif_ttls[oif_index] = 1; | |
9867746a DS |
267 | s_route->c_oil.oil.mfcc_ttls[oif_index] = 1; |
268 | ++s_route->c_oil.oil_ref_count; | |
6250610a JAG |
269 | |
270 | return -1; | |
271 | } | |
272 | ||
9867746a | 273 | s_route->c_oil.oif_creation[oif_index] = 0; |
6250610a | 274 | |
9867746a | 275 | if (s_route->c_oil.oil_ref_count <= 0) { |
6250610a JAG |
276 | listnode_delete(qpim_static_route_list, s_route); |
277 | pim_static_route_free(s_route); | |
278 | } | |
279 | ||
280 | if (PIM_DEBUG_STATIC) { | |
281 | char gifaddr_str[100]; | |
282 | char sifaddr_str[100]; | |
283 | pim_inet4_dump("<ifaddr?>", group, gifaddr_str, sizeof(gifaddr_str)); | |
284 | pim_inet4_dump("<ifaddr?>", source, sifaddr_str, sizeof(sifaddr_str)); | |
285 | zlog_debug("%s: Static route removed(iif=%d,oif=%d,group=%s,source=%s)", | |
286 | __PRETTY_FUNCTION__, | |
287 | iif_index, | |
288 | oif_index, | |
289 | gifaddr_str, | |
290 | sifaddr_str); | |
291 | } | |
292 | ||
293 | break; | |
294 | } | |
295 | } | |
296 | ||
297 | if (!node) { | |
298 | char gifaddr_str[100]; | |
299 | char sifaddr_str[100]; | |
300 | pim_inet4_dump("<ifaddr?>", group, gifaddr_str, sizeof(gifaddr_str)); | |
301 | pim_inet4_dump("<ifaddr?>", source, sifaddr_str, sizeof(sifaddr_str)); | |
302 | zlog_warn("%s %s: Unable to remove static route: Route does not exist(iif=%d,oif=%d,group=%s,source=%s)", | |
303 | __FILE__, __PRETTY_FUNCTION__, | |
304 | iif_index, | |
305 | oif_index, | |
306 | gifaddr_str, | |
307 | sifaddr_str); | |
308 | return -3; | |
309 | } | |
310 | ||
311 | return 0; | |
312 | } | |
f91f89bc DS |
313 | |
314 | int | |
315 | pim_static_write_mroute (struct vty *vty, struct interface *ifp) | |
316 | { | |
317 | struct listnode *node; | |
318 | struct static_route *sroute; | |
319 | int count = 0; | |
320 | char sbuf[100]; | |
321 | char gbuf[100]; | |
322 | ||
323 | for (ALL_LIST_ELEMENTS_RO (qpim_static_route_list, node, sroute)) | |
324 | { | |
325 | pim_inet4_dump ("<ifaddr?>", sroute->group, gbuf, sizeof (gbuf)); | |
326 | pim_inet4_dump ("<ifaddr?>", sroute->source, sbuf, sizeof (sbuf)); | |
327 | if (sroute->iif == ifp->ifindex) | |
328 | { | |
329 | int i; | |
330 | for (i = 0; i < MAXVIFS; i++) | |
331 | if (sroute->oif_ttls[i]) | |
332 | { | |
333 | struct interface *oifp = if_lookup_by_index (i); | |
334 | vty_out (vty, " ip mroute %s %s %s%s", oifp->name, gbuf, sbuf, VTY_NEWLINE); | |
335 | count ++; | |
336 | } | |
337 | } | |
338 | } | |
339 | ||
340 | return count; | |
341 | } |