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ca10883e DS |
1 | /* |
2 | Copyright 2011 by Matthieu Boutier and Juliusz Chroboczek | |
3 | ||
4 | Permission is hereby granted, free of charge, to any person obtaining a copy | |
5 | of this software and associated documentation files (the "Software"), to deal | |
6 | in the Software without restriction, including without limitation the rights | |
7 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
8 | copies of the Software, and to permit persons to whom the Software is | |
9 | furnished to do so, subject to the following conditions: | |
10 | ||
11 | The above copyright notice and this permission notice shall be included in | |
12 | all copies or substantial portions of the Software. | |
13 | ||
14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
17 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
18 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
19 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
20 | THE SOFTWARE. | |
21 | */ | |
22 | ||
23 | #include <zebra.h> | |
24 | #include "command.h" | |
25 | #include "prefix.h" | |
26 | #include "memory.h" | |
27 | #include "table.h" | |
28 | #include "distribute.h" | |
29 | #include "prefix.h" | |
30 | #include "filter.h" | |
31 | #include "plist.h" | |
f135ba52 | 32 | #include "lib_errors.h" |
5920b3eb | 33 | #include "network.h" |
ca10883e DS |
34 | |
35 | #include "babel_main.h" | |
36 | #include "babeld.h" | |
37 | #include "util.h" | |
38 | #include "net.h" | |
39 | #include "kernel.h" | |
40 | #include "babel_interface.h" | |
41 | #include "neighbour.h" | |
42 | #include "route.h" | |
43 | #include "message.h" | |
44 | #include "resend.h" | |
45 | #include "babel_filter.h" | |
46 | #include "babel_zebra.h" | |
f135ba52 | 47 | #include "babel_errors.h" |
ca10883e | 48 | |
bf8d3d6a DL |
49 | DEFINE_MGROUP(BABELD, "babeld"); |
50 | DEFINE_MTYPE_STATIC(BABELD, BABEL, "Babel Structure"); | |
8b7454e9 | 51 | |
ca10883e DS |
52 | static int babel_init_routing_process(struct thread *thread); |
53 | static void babel_get_myid(void); | |
54 | static void babel_initial_noise(void); | |
55 | static int babel_read_protocol (struct thread *thread); | |
56 | static int babel_main_loop(struct thread *thread); | |
57 | static void babel_set_timer(struct timeval *timeout); | |
58 | static void babel_fill_with_next_timeout(struct timeval *tv); | |
03a38493 PG |
59 | static void |
60 | babel_distribute_update (struct distribute_ctx *ctx, struct distribute *dist); | |
ca10883e DS |
61 | |
62 | /* Informations relative to the babel running daemon. */ | |
63 | static struct babel *babel_routing_process = NULL; | |
64 | static unsigned char *receive_buffer = NULL; | |
65 | static int receive_buffer_size = 0; | |
66 | ||
67 | /* timeouts */ | |
68 | struct timeval check_neighbours_timeout; | |
69 | static time_t expiry_time; | |
70 | static time_t source_expiry_time; | |
71 | ||
72 | /* Babel node structure. */ | |
612c2c15 | 73 | static int babel_config_write (struct vty *vty); |
ca10883e DS |
74 | static struct cmd_node cmd_babel_node = |
75 | { | |
f4b8291f | 76 | .name = "babel", |
ca10883e | 77 | .node = BABEL_NODE, |
24389580 | 78 | .parent_node = CONFIG_NODE, |
ca10883e | 79 | .prompt = "%s(config-router)# ", |
612c2c15 | 80 | .config_write = babel_config_write, |
ca10883e DS |
81 | }; |
82 | ||
83 | /* print current babel configuration on vty */ | |
84 | static int | |
85 | babel_config_write (struct vty *vty) | |
86 | { | |
87 | int lines = 0; | |
dd8765ca | 88 | int afi; |
ca10883e DS |
89 | int i; |
90 | ||
91 | /* list enabled debug modes */ | |
92 | lines += debug_babel_config_write (vty); | |
93 | ||
94 | if (!babel_routing_process) | |
95 | return lines; | |
5c7571d4 | 96 | vty_out (vty, "router babel\n"); |
ca10883e DS |
97 | if (diversity_kind != DIVERSITY_NONE) |
98 | { | |
5c7571d4 | 99 | vty_out (vty, " babel diversity\n"); |
ca10883e DS |
100 | lines++; |
101 | } | |
102 | if (diversity_factor != BABEL_DEFAULT_DIVERSITY_FACTOR) | |
103 | { | |
5c7571d4 | 104 | vty_out (vty, " babel diversity-factor %d\n",diversity_factor); |
ca10883e DS |
105 | lines++; |
106 | } | |
107 | if (resend_delay != BABEL_DEFAULT_RESEND_DELAY) | |
108 | { | |
5c7571d4 | 109 | vty_out (vty, " babel resend-delay %u\n", resend_delay); |
ca10883e DS |
110 | lines++; |
111 | } | |
112 | if (smoothing_half_life != BABEL_DEFAULT_SMOOTHING_HALF_LIFE) | |
113 | { | |
5c7571d4 | 114 | vty_out (vty, " babel smoothing-half-life %u\n", |
96ade3ed | 115 | smoothing_half_life); |
ca10883e DS |
116 | lines++; |
117 | } | |
118 | /* list enabled interfaces */ | |
119 | lines = 1 + babel_enable_if_config_write (vty); | |
120 | /* list redistributed protocols */ | |
dd8765ca RW |
121 | for (afi = AFI_IP; afi <= AFI_IP6; afi++) { |
122 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) { | |
123 | if (i != zclient->redist_default && | |
124 | vrf_bitmap_check (zclient->redist[afi][i], VRF_DEFAULT)) { | |
125 | vty_out (vty, " redistribute %s %s\n", | |
126 | (afi == AFI_IP) ? "ipv4" : "ipv6", | |
127 | zebra_route_string(i)); | |
128 | lines++; | |
129 | } | |
ca10883e | 130 | } |
dd8765ca | 131 | } |
ca10883e | 132 | |
03a38493 | 133 | lines += config_write_distribute (vty, babel_routing_process->distribute_ctx); |
ca10883e DS |
134 | |
135 | return lines; | |
136 | } | |
137 | ||
138 | ||
139 | static int | |
140 | babel_create_routing_process (void) | |
141 | { | |
142 | assert (babel_routing_process == NULL); | |
143 | ||
144 | /* Allocaste Babel instance. */ | |
0d6f7fd6 | 145 | babel_routing_process = XCALLOC(MTYPE_BABEL, sizeof(struct babel)); |
ca10883e DS |
146 | |
147 | /* Initialize timeouts */ | |
148 | gettime(&babel_now); | |
149 | expiry_time = babel_now.tv_sec + roughly(30); | |
150 | source_expiry_time = babel_now.tv_sec + roughly(300); | |
151 | ||
152 | /* Make socket for Babel protocol. */ | |
153 | protocol_socket = babel_socket(protocol_port); | |
154 | if (protocol_socket < 0) { | |
450971aa | 155 | flog_err_sys(EC_LIB_SOCKET, "Couldn't create link local socket: %s", |
f135ba52 | 156 | safe_strerror(errno)); |
ca10883e DS |
157 | goto fail; |
158 | } | |
159 | ||
160 | /* Threads. */ | |
161 | thread_add_read(master, &babel_read_protocol, NULL, protocol_socket, &babel_routing_process->t_read); | |
162 | /* wait a little: zebra will announce interfaces, addresses, routes... */ | |
163 | thread_add_timer_msec(master, babel_init_routing_process, NULL, 200L, &babel_routing_process->t_update); | |
ca10883e | 164 | |
03a38493 PG |
165 | /* Distribute list install. */ |
166 | babel_routing_process->distribute_ctx = distribute_list_ctx_create (vrf_lookup_by_id(VRF_DEFAULT)); | |
167 | distribute_list_add_hook (babel_routing_process->distribute_ctx, babel_distribute_update); | |
168 | distribute_list_delete_hook (babel_routing_process->distribute_ctx, babel_distribute_update); | |
169 | return 0; | |
ca10883e DS |
170 | fail: |
171 | XFREE(MTYPE_BABEL, babel_routing_process); | |
ca10883e DS |
172 | return -1; |
173 | } | |
174 | ||
175 | /* thread reading entries form others babel daemons */ | |
176 | static int | |
177 | babel_read_protocol (struct thread *thread) | |
178 | { | |
179 | int rc; | |
f4e14fdb | 180 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
ca10883e DS |
181 | struct interface *ifp = NULL; |
182 | struct sockaddr_in6 sin6; | |
ca10883e DS |
183 | |
184 | assert(babel_routing_process != NULL); | |
185 | assert(protocol_socket >= 0); | |
186 | ||
187 | rc = babel_recv(protocol_socket, | |
188 | receive_buffer, receive_buffer_size, | |
189 | (struct sockaddr*)&sin6, sizeof(sin6)); | |
190 | if(rc < 0) { | |
191 | if(errno != EAGAIN && errno != EINTR) { | |
450971aa | 192 | flog_err_sys(EC_LIB_SOCKET, "recv: %s", safe_strerror(errno)); |
ca10883e DS |
193 | } |
194 | } else { | |
f4e14fdb | 195 | FOR_ALL_INTERFACES(vrf, ifp) { |
ca10883e DS |
196 | if(!if_up(ifp)) |
197 | continue; | |
198 | if(ifp->ifindex == (ifindex_t)sin6.sin6_scope_id) { | |
199 | parse_packet((unsigned char*)&sin6.sin6_addr, ifp, | |
200 | receive_buffer, rc); | |
201 | break; | |
202 | } | |
203 | } | |
204 | } | |
205 | ||
206 | /* re-add thread */ | |
207 | thread_add_read(master, &babel_read_protocol, NULL, protocol_socket, &babel_routing_process->t_read); | |
208 | return 0; | |
209 | } | |
210 | ||
211 | /* Zebra will give some information, especially about interfaces. This function | |
212 | must be call with a litte timeout wich may give zebra the time to do his job, | |
213 | making these inits have sense. */ | |
214 | static int | |
215 | babel_init_routing_process(struct thread *thread) | |
216 | { | |
5920b3eb | 217 | myseqno = (frr_weak_random() & 0xFFFF); |
ca10883e DS |
218 | babel_get_myid(); |
219 | babel_load_state_file(); | |
220 | debugf(BABEL_DEBUG_COMMON, "My ID is : %s.", format_eui64(myid)); | |
221 | babel_initial_noise(); | |
222 | babel_main_loop(thread);/* this function self-add to the t_update thread */ | |
223 | return 0; | |
224 | } | |
225 | ||
226 | /* fill "myid" with an unique id (only if myid != {0}). */ | |
227 | static void | |
228 | babel_get_myid(void) | |
229 | { | |
f4e14fdb | 230 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
ca10883e | 231 | struct interface *ifp = NULL; |
ca10883e DS |
232 | int rc; |
233 | int i; | |
234 | ||
235 | /* if we already have an id (from state file), we return. */ | |
236 | if (memcmp(myid, zeroes, 8) != 0) { | |
237 | return; | |
238 | } | |
239 | ||
f4e14fdb | 240 | FOR_ALL_INTERFACES(vrf, ifp) { |
ca10883e DS |
241 | /* ifp->ifindex is not necessarily valid at this point */ |
242 | int ifindex = if_nametoindex(ifp->name); | |
243 | if(ifindex > 0) { | |
244 | unsigned char eui[8]; | |
edb1d4a0 | 245 | rc = if_eui64(ifindex, eui); |
ca10883e DS |
246 | if(rc < 0) |
247 | continue; | |
248 | memcpy(myid, eui, 8); | |
249 | return; | |
250 | } | |
251 | } | |
252 | ||
253 | /* We failed to get a global EUI64 from the interfaces we were given. | |
254 | Let's try to find an interface with a MAC address. */ | |
255 | for(i = 1; i < 256; i++) { | |
256 | char buf[IF_NAMESIZE], *ifname; | |
257 | unsigned char eui[8]; | |
258 | ifname = if_indextoname(i, buf); | |
259 | if(ifname == NULL) | |
260 | continue; | |
edb1d4a0 | 261 | rc = if_eui64(i, eui); |
ca10883e DS |
262 | if(rc < 0) |
263 | continue; | |
264 | memcpy(myid, eui, 8); | |
265 | return; | |
266 | } | |
267 | ||
5c997d29 | 268 | flog_err(EC_BABEL_CONFIG, "Couldn't find router id -- using random value."); |
ca10883e DS |
269 | |
270 | rc = read_random_bytes(myid, 8); | |
271 | if(rc < 0) { | |
5b003f31 | 272 | flog_err(EC_BABEL_CONFIG, "read(random): %s (cannot assign an ID)", |
e33b116c | 273 | safe_strerror(errno)); |
ca10883e DS |
274 | exit(1); |
275 | } | |
276 | /* Clear group and global bits */ | |
277 | myid[0] &= ~3; | |
278 | } | |
279 | ||
280 | /* Make some noise so that others notice us, and send retractions in | |
281 | case we were restarted recently */ | |
282 | static void | |
283 | babel_initial_noise(void) | |
284 | { | |
f4e14fdb | 285 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
ca10883e | 286 | struct interface *ifp = NULL; |
ca10883e | 287 | |
f4e14fdb | 288 | FOR_ALL_INTERFACES(vrf, ifp) { |
ca10883e DS |
289 | if(!if_up(ifp)) |
290 | continue; | |
291 | /* Apply jitter before we send the first message. */ | |
292 | usleep(roughly(10000)); | |
293 | gettime(&babel_now); | |
294 | send_hello(ifp); | |
295 | send_wildcard_retraction(ifp); | |
296 | } | |
297 | ||
f4e14fdb | 298 | FOR_ALL_INTERFACES(vrf, ifp) { |
ca10883e DS |
299 | if(!if_up(ifp)) |
300 | continue; | |
301 | usleep(roughly(10000)); | |
302 | gettime(&babel_now); | |
303 | send_hello(ifp); | |
304 | send_wildcard_retraction(ifp); | |
305 | send_self_update(ifp); | |
306 | send_request(ifp, NULL, 0); | |
307 | flushupdates(ifp); | |
308 | flushbuf(ifp); | |
309 | } | |
310 | } | |
311 | ||
312 | /* Delete all the added babel routes, make babeld only speak to zebra. */ | |
313 | static void | |
4d762f26 | 314 | babel_clean_routing_process(void) |
ca10883e DS |
315 | { |
316 | flush_all_routes(); | |
317 | babel_interface_close_all(); | |
318 | ||
b3d6bc6e MS |
319 | /* cancel events */ |
320 | thread_cancel(&babel_routing_process->t_read); | |
321 | thread_cancel(&babel_routing_process->t_update); | |
ca10883e | 322 | |
03a38493 | 323 | distribute_list_delete(&babel_routing_process->distribute_ctx); |
ca10883e | 324 | XFREE(MTYPE_BABEL, babel_routing_process); |
ca10883e DS |
325 | } |
326 | ||
327 | /* Function used with timeout. */ | |
328 | static int | |
329 | babel_main_loop(struct thread *thread) | |
330 | { | |
331 | struct timeval tv; | |
f4e14fdb | 332 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
ca10883e | 333 | struct interface *ifp = NULL; |
ca10883e DS |
334 | |
335 | while(1) { | |
336 | gettime(&babel_now); | |
337 | ||
338 | /* timeouts --------------------------------------------------------- */ | |
339 | /* get the next timeout */ | |
340 | babel_fill_with_next_timeout(&tv); | |
341 | /* if there is no timeout, we must wait. */ | |
342 | if(timeval_compare(&tv, &babel_now) > 0) { | |
343 | timeval_minus(&tv, &tv, &babel_now); | |
a97986ff DL |
344 | debugf(BABEL_DEBUG_TIMEOUT, "babel main loop : timeout: %lld msecs", |
345 | (long long)tv.tv_sec * 1000 + tv.tv_usec / 1000); | |
ca10883e DS |
346 | /* it happens often to have less than 1 ms, it's bad. */ |
347 | timeval_add_msec(&tv, &tv, 300); | |
348 | babel_set_timer(&tv); | |
349 | return 0; | |
350 | } | |
351 | ||
352 | gettime(&babel_now); | |
353 | ||
354 | /* update database -------------------------------------------------- */ | |
355 | if(timeval_compare(&check_neighbours_timeout, &babel_now) < 0) { | |
356 | int msecs; | |
357 | msecs = check_neighbours(); | |
358 | /* Multiply by 3/2 to allow neighbours to expire. */ | |
359 | msecs = MAX(3 * msecs / 2, 10); | |
360 | schedule_neighbours_check(msecs, 1); | |
361 | } | |
362 | ||
363 | if(babel_now.tv_sec >= expiry_time) { | |
364 | expire_routes(); | |
365 | expire_resend(); | |
366 | expiry_time = babel_now.tv_sec + roughly(30); | |
367 | } | |
368 | ||
369 | if(babel_now.tv_sec >= source_expiry_time) { | |
370 | expire_sources(); | |
371 | source_expiry_time = babel_now.tv_sec + roughly(300); | |
372 | } | |
373 | ||
f4e14fdb | 374 | FOR_ALL_INTERFACES(vrf, ifp) { |
ca10883e DS |
375 | babel_interface_nfo *babel_ifp = NULL; |
376 | if(!if_up(ifp)) | |
377 | continue; | |
378 | babel_ifp = babel_get_if_nfo(ifp); | |
379 | if(timeval_compare(&babel_now, &babel_ifp->hello_timeout) >= 0) | |
380 | send_hello(ifp); | |
381 | if(timeval_compare(&babel_now, &babel_ifp->update_timeout) >= 0) | |
382 | send_update(ifp, 0, NULL, 0); | |
383 | if(timeval_compare(&babel_now, | |
384 | &babel_ifp->update_flush_timeout) >= 0) | |
385 | flushupdates(ifp); | |
386 | } | |
387 | ||
388 | if(resend_time.tv_sec != 0) { | |
389 | if(timeval_compare(&babel_now, &resend_time) >= 0) | |
390 | do_resend(); | |
391 | } | |
392 | ||
393 | if(unicast_flush_timeout.tv_sec != 0) { | |
394 | if(timeval_compare(&babel_now, &unicast_flush_timeout) >= 0) | |
395 | flush_unicast(1); | |
396 | } | |
397 | ||
f4e14fdb | 398 | FOR_ALL_INTERFACES(vrf, ifp) { |
ca10883e DS |
399 | babel_interface_nfo *babel_ifp = NULL; |
400 | if(!if_up(ifp)) | |
401 | continue; | |
402 | babel_ifp = babel_get_if_nfo(ifp); | |
403 | if(babel_ifp->flush_timeout.tv_sec != 0) { | |
404 | if(timeval_compare(&babel_now, &babel_ifp->flush_timeout) >= 0) | |
405 | flushbuf(ifp); | |
406 | } | |
407 | } | |
408 | } | |
409 | ||
410 | assert(0); /* this line should never be reach */ | |
be04d148 | 411 | return 0; |
ca10883e DS |
412 | } |
413 | ||
414 | static void | |
415 | printIfMin(struct timeval *tv, int cmd, const char *tag, const char *ifname) | |
416 | { | |
417 | static struct timeval curr_tv; | |
418 | static char buffer[200]; | |
419 | static const char *curr_tag = NULL; | |
420 | ||
421 | switch (cmd) { | |
422 | case 0: /* reset timeval */ | |
423 | curr_tv = *tv; | |
424 | if(ifname != NULL) { | |
425 | snprintf(buffer, 200L, "interface: %s; %s", ifname, tag); | |
426 | curr_tag = buffer; | |
427 | } else { | |
428 | curr_tag = tag; | |
429 | } | |
430 | break; | |
431 | case 1: /* take the min */ | |
432 | if (tv->tv_sec == 0 && tv->tv_usec == 0) { /* if (tv == ∞) */ | |
433 | break; | |
434 | } | |
435 | if (tv->tv_sec < curr_tv.tv_sec ||(tv->tv_sec == curr_tv.tv_sec && | |
436 | tv->tv_usec < curr_tv.tv_usec)) { | |
437 | curr_tv = *tv; | |
438 | if(ifname != NULL) { | |
439 | snprintf(buffer, 200L, "interface: %s; %s", ifname, tag); | |
440 | curr_tag = buffer; | |
441 | } else { | |
442 | curr_tag = tag; | |
443 | } | |
444 | } | |
445 | break; | |
446 | case 2: /* print message */ | |
447 | debugf(BABEL_DEBUG_TIMEOUT, "next timeout due to: %s", curr_tag); | |
448 | break; | |
449 | default: | |
450 | break; | |
451 | } | |
452 | } | |
453 | ||
454 | static void | |
455 | babel_fill_with_next_timeout(struct timeval *tv) | |
456 | { | |
457 | #if (defined NO_DEBUG) | |
458 | #define printIfMin(a,b,c,d) | |
459 | #else | |
460 | #define printIfMin(a,b,c,d) \ | |
461 | if (UNLIKELY(debug & BABEL_DEBUG_TIMEOUT)) {printIfMin(a,b,c,d);} | |
462 | ||
f4e14fdb | 463 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
ca10883e | 464 | struct interface *ifp = NULL; |
ca10883e DS |
465 | |
466 | *tv = check_neighbours_timeout; | |
467 | printIfMin(tv, 0, "check_neighbours_timeout", NULL); | |
468 | timeval_min_sec(tv, expiry_time); | |
469 | printIfMin(tv, 1, "expiry_time", NULL); | |
470 | timeval_min_sec(tv, source_expiry_time); | |
471 | printIfMin(tv, 1, "source_expiry_time", NULL); | |
472 | timeval_min(tv, &resend_time); | |
473 | printIfMin(tv, 1, "resend_time", NULL); | |
f4e14fdb | 474 | FOR_ALL_INTERFACES(vrf, ifp) { |
ca10883e DS |
475 | babel_interface_nfo *babel_ifp = NULL; |
476 | if(!if_up(ifp)) | |
477 | continue; | |
478 | babel_ifp = babel_get_if_nfo(ifp); | |
479 | timeval_min(tv, &babel_ifp->flush_timeout); | |
480 | printIfMin(tv, 1, "flush_timeout", ifp->name); | |
481 | timeval_min(tv, &babel_ifp->hello_timeout); | |
482 | printIfMin(tv, 1, "hello_timeout", ifp->name); | |
483 | timeval_min(tv, &babel_ifp->update_timeout); | |
484 | printIfMin(tv, 1, "update_timeout", ifp->name); | |
485 | timeval_min(tv, &babel_ifp->update_flush_timeout); | |
486 | printIfMin(tv, 1, "update_flush_timeout",ifp->name); | |
487 | } | |
488 | timeval_min(tv, &unicast_flush_timeout); | |
489 | printIfMin(tv, 1, "unicast_flush_timeout", NULL); | |
490 | printIfMin(tv, 2, NULL, NULL); | |
491 | #undef printIfMin | |
492 | #endif | |
493 | } | |
494 | ||
495 | /* set the t_update thread of the babel routing process to be launch in | |
496 | 'timeout' (approximate at the milisecond) */ | |
497 | static void | |
498 | babel_set_timer(struct timeval *timeout) | |
499 | { | |
500 | long msecs = timeout->tv_sec * 1000 + timeout->tv_usec / 1000; | |
b3d6bc6e | 501 | thread_cancel(&(babel_routing_process->t_update)); |
ca10883e DS |
502 | thread_add_timer_msec(master, babel_main_loop, NULL, msecs, &babel_routing_process->t_update); |
503 | } | |
504 | ||
505 | void | |
506 | schedule_neighbours_check(int msecs, int override) | |
507 | { | |
508 | struct timeval timeout; | |
509 | ||
510 | timeval_add_msec(&timeout, &babel_now, msecs); | |
511 | if(override) | |
512 | check_neighbours_timeout = timeout; | |
513 | else | |
514 | timeval_min(&check_neighbours_timeout, &timeout); | |
515 | } | |
516 | ||
517 | int | |
518 | resize_receive_buffer(int size) | |
519 | { | |
520 | if(size <= receive_buffer_size) | |
521 | return 0; | |
522 | ||
523 | if(receive_buffer == NULL) { | |
524 | receive_buffer = malloc(size); | |
525 | if(receive_buffer == NULL) { | |
5b003f31 | 526 | flog_err(EC_BABEL_MEMORY, "malloc(receive_buffer): %s", |
f135ba52 | 527 | safe_strerror(errno)); |
ca10883e DS |
528 | return -1; |
529 | } | |
530 | receive_buffer_size = size; | |
531 | } else { | |
532 | unsigned char *new; | |
533 | new = realloc(receive_buffer, size); | |
534 | if(new == NULL) { | |
5b003f31 | 535 | flog_err(EC_BABEL_MEMORY, "realloc(receive_buffer): %s", |
f135ba52 | 536 | safe_strerror(errno)); |
ca10883e DS |
537 | return -1; |
538 | } | |
539 | receive_buffer = new; | |
540 | receive_buffer_size = size; | |
541 | } | |
542 | return 1; | |
543 | } | |
544 | ||
545 | static void | |
03a38493 | 546 | babel_distribute_update (struct distribute_ctx *ctx, struct distribute *dist) |
ca10883e DS |
547 | { |
548 | struct interface *ifp; | |
549 | babel_interface_nfo *babel_ifp; | |
550 | int type; | |
551 | int family; | |
552 | ||
553 | if (! dist->ifname) | |
554 | return; | |
555 | ||
a36898e7 | 556 | ifp = if_lookup_by_name (dist->ifname, VRF_DEFAULT); |
ca10883e DS |
557 | if (ifp == NULL) |
558 | return; | |
559 | ||
560 | babel_ifp = babel_get_if_nfo(ifp); | |
561 | ||
562 | for (type = 0; type < DISTRIBUTE_MAX; type++) { | |
563 | family = type == DISTRIBUTE_V4_IN || type == DISTRIBUTE_V4_OUT ? | |
564 | AFI_IP : AFI_IP6; | |
565 | if (dist->list[type]) | |
566 | babel_ifp->list[type] = access_list_lookup (family, | |
567 | dist->list[type]); | |
568 | else | |
569 | babel_ifp->list[type] = NULL; | |
570 | if (dist->prefix[type]) | |
571 | babel_ifp->prefix[type] = prefix_list_lookup (family, | |
572 | dist->prefix[type]); | |
573 | else | |
574 | babel_ifp->prefix[type] = NULL; | |
575 | } | |
576 | } | |
577 | ||
578 | static void | |
579 | babel_distribute_update_interface (struct interface *ifp) | |
580 | { | |
03a38493 | 581 | struct distribute *dist = NULL; |
ca10883e | 582 | |
03a38493 PG |
583 | if (babel_routing_process) |
584 | dist = distribute_lookup(babel_routing_process->distribute_ctx, ifp->name); | |
ca10883e | 585 | if (dist) |
03a38493 | 586 | babel_distribute_update (babel_routing_process->distribute_ctx, dist); |
ca10883e DS |
587 | } |
588 | ||
589 | /* Update all interface's distribute list. */ | |
590 | static void | |
591 | babel_distribute_update_all (struct prefix_list *notused) | |
592 | { | |
f4e14fdb | 593 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
ca10883e | 594 | struct interface *ifp; |
ca10883e | 595 | |
451fda4f | 596 | FOR_ALL_INTERFACES (vrf, ifp) |
ca10883e DS |
597 | babel_distribute_update_interface (ifp); |
598 | } | |
599 | ||
600 | static void | |
601 | babel_distribute_update_all_wrapper (struct access_list *notused) | |
602 | { | |
603 | babel_distribute_update_all(NULL); | |
604 | } | |
605 | ||
606 | ||
607 | /* [Command] */ | |
f84d11d1 DS |
608 | DEFUN_NOSH (router_babel, |
609 | router_babel_cmd, | |
610 | "router babel", | |
611 | "Enable a routing process\n" | |
612 | "Make Babel instance command\n") | |
ca10883e DS |
613 | { |
614 | int ret; | |
615 | ||
616 | vty->node = BABEL_NODE; | |
617 | ||
618 | if (!babel_routing_process) { | |
619 | ret = babel_create_routing_process (); | |
620 | ||
621 | /* Notice to user we couldn't create Babel. */ | |
622 | if (ret < 0) { | |
623 | zlog_warn ("can't create Babel"); | |
624 | return CMD_WARNING; | |
625 | } | |
626 | } | |
627 | ||
628 | return CMD_SUCCESS; | |
629 | } | |
630 | ||
631 | /* [Command] */ | |
632 | DEFUN (no_router_babel, | |
633 | no_router_babel_cmd, | |
634 | "no router babel", | |
635 | NO_STR | |
636 | "Disable a routing process\n" | |
7111c1a0 | 637 | "Remove Babel instance command\n") |
ca10883e DS |
638 | { |
639 | if(babel_routing_process) | |
640 | babel_clean_routing_process(); | |
641 | return CMD_SUCCESS; | |
642 | } | |
643 | ||
644 | /* [Babel Command] */ | |
645 | DEFUN (babel_diversity, | |
646 | babel_diversity_cmd, | |
647 | "babel diversity", | |
648 | "Babel commands\n" | |
649 | "Enable diversity-aware routing.\n") | |
650 | { | |
651 | diversity_kind = DIVERSITY_CHANNEL; | |
652 | return CMD_SUCCESS; | |
653 | } | |
654 | ||
655 | /* [Babel Command] */ | |
656 | DEFUN (no_babel_diversity, | |
657 | no_babel_diversity_cmd, | |
658 | "no babel diversity", | |
659 | NO_STR | |
660 | "Babel commands\n" | |
661 | "Disable diversity-aware routing.\n") | |
662 | { | |
663 | diversity_kind = DIVERSITY_NONE; | |
664 | return CMD_SUCCESS; | |
665 | } | |
666 | ||
667 | /* [Babel Command] */ | |
668 | DEFUN (babel_diversity_factor, | |
669 | babel_diversity_factor_cmd, | |
670 | "babel diversity-factor (1-256)", | |
671 | "Babel commands\n" | |
672 | "Set the diversity factor.\n" | |
673 | "Factor in units of 1/256.\n") | |
674 | { | |
675 | int factor; | |
676 | ||
facfee22 | 677 | factor = strtoul(argv[2]->arg, NULL, 10); |
ca10883e DS |
678 | |
679 | diversity_factor = factor; | |
680 | return CMD_SUCCESS; | |
681 | } | |
682 | ||
683 | /* [Babel Command] */ | |
684 | DEFUN (babel_set_resend_delay, | |
685 | babel_set_resend_delay_cmd, | |
686 | "babel resend-delay (20-655340)", | |
687 | "Babel commands\n" | |
688 | "Time before resending a message\n" | |
689 | "Milliseconds\n") | |
690 | { | |
691 | int interval; | |
692 | ||
facfee22 | 693 | interval = strtoul(argv[2]->arg, NULL, 10); |
ca10883e DS |
694 | |
695 | resend_delay = interval; | |
696 | return CMD_SUCCESS; | |
697 | } | |
698 | ||
699 | /* [Babel Command] */ | |
700 | DEFUN (babel_set_smoothing_half_life, | |
701 | babel_set_smoothing_half_life_cmd, | |
702 | "babel smoothing-half-life (0-65534)", | |
703 | "Babel commands\n" | |
704 | "Smoothing half-life\n" | |
705 | "Seconds (0 to disable)\n") | |
706 | { | |
707 | int seconds; | |
708 | ||
facfee22 | 709 | seconds = strtoul(argv[2]->arg, NULL, 10); |
ca10883e DS |
710 | |
711 | change_smoothing_half_life(seconds); | |
712 | return CMD_SUCCESS; | |
713 | } | |
714 | ||
715 | void | |
716 | babeld_quagga_init(void) | |
717 | { | |
718 | ||
612c2c15 | 719 | install_node(&cmd_babel_node); |
ca10883e DS |
720 | |
721 | install_element(CONFIG_NODE, &router_babel_cmd); | |
722 | install_element(CONFIG_NODE, &no_router_babel_cmd); | |
723 | ||
724 | install_default(BABEL_NODE); | |
725 | install_element(BABEL_NODE, &babel_diversity_cmd); | |
726 | install_element(BABEL_NODE, &no_babel_diversity_cmd); | |
727 | install_element(BABEL_NODE, &babel_diversity_factor_cmd); | |
728 | install_element(BABEL_NODE, &babel_set_resend_delay_cmd); | |
729 | install_element(BABEL_NODE, &babel_set_smoothing_half_life_cmd); | |
730 | ||
731 | babel_if_init(); | |
732 | ||
733 | /* Access list install. */ | |
734 | access_list_init (); | |
735 | access_list_add_hook (babel_distribute_update_all_wrapper); | |
736 | access_list_delete_hook (babel_distribute_update_all_wrapper); | |
737 | ||
738 | /* Prefix list initialize.*/ | |
739 | prefix_list_init (); | |
740 | prefix_list_add_hook (babel_distribute_update_all); | |
741 | prefix_list_delete_hook (babel_distribute_update_all); | |
742 | ||
743 | /* Distribute list install. */ | |
03a38493 | 744 | distribute_list_init(BABEL_NODE); |
ca10883e DS |
745 | } |
746 | ||
747 | /* Stubs to adapt Babel's filtering calls to Quagga's infrastructure. */ | |
748 | ||
749 | int | |
750 | input_filter(const unsigned char *id, | |
751 | const unsigned char *prefix, unsigned short plen, | |
752 | const unsigned char *neigh, unsigned int ifindex) | |
753 | { | |
754 | return babel_filter(0, prefix, plen, ifindex); | |
755 | } | |
756 | ||
757 | int | |
758 | output_filter(const unsigned char *id, const unsigned char *prefix, | |
759 | unsigned short plen, unsigned int ifindex) | |
760 | { | |
761 | return babel_filter(1, prefix, plen, ifindex); | |
762 | } | |
763 | ||
764 | /* There's no redistribute filter in Quagga -- the zebra daemon does its | |
765 | own filtering. */ | |
766 | int | |
767 | redistribute_filter(const unsigned char *prefix, unsigned short plen, | |
768 | unsigned int ifindex, int proto) | |
769 | { | |
770 | return 0; | |
771 | } | |
772 | ||
03a38493 PG |
773 | struct babel *babel_lookup(void) |
774 | { | |
775 | return babel_routing_process; | |
776 | } |