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Commit | Line | Data |
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acddc0ed | 1 | // SPDX-License-Identifier: MIT |
ca10883e DS |
2 | /* |
3 | Copyright 2011 by Matthieu Boutier and Juliusz Chroboczek | |
ca10883e DS |
4 | */ |
5 | ||
6 | #include <zebra.h> | |
7 | #include "command.h" | |
8 | #include "prefix.h" | |
9 | #include "memory.h" | |
10 | #include "table.h" | |
11 | #include "distribute.h" | |
12 | #include "prefix.h" | |
13 | #include "filter.h" | |
14 | #include "plist.h" | |
f135ba52 | 15 | #include "lib_errors.h" |
5920b3eb | 16 | #include "network.h" |
3682bd90 | 17 | #include "if.h" |
ca10883e DS |
18 | |
19 | #include "babel_main.h" | |
20 | #include "babeld.h" | |
21 | #include "util.h" | |
22 | #include "net.h" | |
23 | #include "kernel.h" | |
24 | #include "babel_interface.h" | |
25 | #include "neighbour.h" | |
26 | #include "route.h" | |
27 | #include "message.h" | |
28 | #include "resend.h" | |
29 | #include "babel_filter.h" | |
30 | #include "babel_zebra.h" | |
f135ba52 | 31 | #include "babel_errors.h" |
ca10883e | 32 | |
9affd464 YZ |
33 | #ifndef VTYSH_EXTRACT_PL |
34 | #include "babeld/babeld_clippy.c" | |
35 | #endif | |
36 | ||
bf8d3d6a DL |
37 | DEFINE_MGROUP(BABELD, "babeld"); |
38 | DEFINE_MTYPE_STATIC(BABELD, BABEL, "Babel Structure"); | |
8b7454e9 | 39 | |
cc9f21da | 40 | static void babel_init_routing_process(struct thread *thread); |
ca10883e DS |
41 | static void babel_get_myid(void); |
42 | static void babel_initial_noise(void); | |
cc9f21da DS |
43 | static void babel_read_protocol(struct thread *thread); |
44 | static void babel_main_loop(struct thread *thread); | |
ca10883e DS |
45 | static void babel_set_timer(struct timeval *timeout); |
46 | static void babel_fill_with_next_timeout(struct timeval *tv); | |
03a38493 PG |
47 | static void |
48 | babel_distribute_update (struct distribute_ctx *ctx, struct distribute *dist); | |
ca10883e DS |
49 | |
50 | /* Informations relative to the babel running daemon. */ | |
51 | static struct babel *babel_routing_process = NULL; | |
52 | static unsigned char *receive_buffer = NULL; | |
53 | static int receive_buffer_size = 0; | |
54 | ||
55 | /* timeouts */ | |
56 | struct timeval check_neighbours_timeout; | |
57 | static time_t expiry_time; | |
58 | static time_t source_expiry_time; | |
59 | ||
60 | /* Babel node structure. */ | |
612c2c15 | 61 | static int babel_config_write (struct vty *vty); |
ca10883e DS |
62 | static struct cmd_node cmd_babel_node = |
63 | { | |
f4b8291f | 64 | .name = "babel", |
ca10883e | 65 | .node = BABEL_NODE, |
24389580 | 66 | .parent_node = CONFIG_NODE, |
ca10883e | 67 | .prompt = "%s(config-router)# ", |
612c2c15 | 68 | .config_write = babel_config_write, |
ca10883e DS |
69 | }; |
70 | ||
71 | /* print current babel configuration on vty */ | |
72 | static int | |
73 | babel_config_write (struct vty *vty) | |
74 | { | |
75 | int lines = 0; | |
dd8765ca | 76 | int afi; |
ca10883e DS |
77 | int i; |
78 | ||
79 | /* list enabled debug modes */ | |
80 | lines += debug_babel_config_write (vty); | |
81 | ||
82 | if (!babel_routing_process) | |
83 | return lines; | |
5c7571d4 | 84 | vty_out (vty, "router babel\n"); |
ca10883e DS |
85 | if (diversity_kind != DIVERSITY_NONE) |
86 | { | |
5c7571d4 | 87 | vty_out (vty, " babel diversity\n"); |
ca10883e DS |
88 | lines++; |
89 | } | |
90 | if (diversity_factor != BABEL_DEFAULT_DIVERSITY_FACTOR) | |
91 | { | |
5c7571d4 | 92 | vty_out (vty, " babel diversity-factor %d\n",diversity_factor); |
ca10883e DS |
93 | lines++; |
94 | } | |
95 | if (resend_delay != BABEL_DEFAULT_RESEND_DELAY) | |
96 | { | |
5c7571d4 | 97 | vty_out (vty, " babel resend-delay %u\n", resend_delay); |
ca10883e DS |
98 | lines++; |
99 | } | |
100 | if (smoothing_half_life != BABEL_DEFAULT_SMOOTHING_HALF_LIFE) | |
101 | { | |
5c7571d4 | 102 | vty_out (vty, " babel smoothing-half-life %u\n", |
96ade3ed | 103 | smoothing_half_life); |
ca10883e DS |
104 | lines++; |
105 | } | |
106 | /* list enabled interfaces */ | |
107 | lines = 1 + babel_enable_if_config_write (vty); | |
108 | /* list redistributed protocols */ | |
dd8765ca RW |
109 | for (afi = AFI_IP; afi <= AFI_IP6; afi++) { |
110 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) { | |
111 | if (i != zclient->redist_default && | |
112 | vrf_bitmap_check (zclient->redist[afi][i], VRF_DEFAULT)) { | |
113 | vty_out (vty, " redistribute %s %s\n", | |
114 | (afi == AFI_IP) ? "ipv4" : "ipv6", | |
115 | zebra_route_string(i)); | |
116 | lines++; | |
117 | } | |
ca10883e | 118 | } |
dd8765ca | 119 | } |
ca10883e | 120 | |
03a38493 | 121 | lines += config_write_distribute (vty, babel_routing_process->distribute_ctx); |
ca10883e | 122 | |
07679ad9 IR |
123 | vty_out (vty, "exit\n"); |
124 | ||
ca10883e DS |
125 | return lines; |
126 | } | |
127 | ||
128 | ||
129 | static int | |
130 | babel_create_routing_process (void) | |
131 | { | |
132 | assert (babel_routing_process == NULL); | |
133 | ||
134 | /* Allocaste Babel instance. */ | |
0d6f7fd6 | 135 | babel_routing_process = XCALLOC(MTYPE_BABEL, sizeof(struct babel)); |
ca10883e DS |
136 | |
137 | /* Initialize timeouts */ | |
138 | gettime(&babel_now); | |
139 | expiry_time = babel_now.tv_sec + roughly(30); | |
140 | source_expiry_time = babel_now.tv_sec + roughly(300); | |
141 | ||
142 | /* Make socket for Babel protocol. */ | |
143 | protocol_socket = babel_socket(protocol_port); | |
144 | if (protocol_socket < 0) { | |
450971aa | 145 | flog_err_sys(EC_LIB_SOCKET, "Couldn't create link local socket: %s", |
f135ba52 | 146 | safe_strerror(errno)); |
ca10883e DS |
147 | goto fail; |
148 | } | |
149 | ||
150 | /* Threads. */ | |
403081e1 | 151 | thread_add_read(master, babel_read_protocol, NULL, protocol_socket, &babel_routing_process->t_read); |
ca10883e DS |
152 | /* wait a little: zebra will announce interfaces, addresses, routes... */ |
153 | thread_add_timer_msec(master, babel_init_routing_process, NULL, 200L, &babel_routing_process->t_update); | |
ca10883e | 154 | |
03a38493 PG |
155 | /* Distribute list install. */ |
156 | babel_routing_process->distribute_ctx = distribute_list_ctx_create (vrf_lookup_by_id(VRF_DEFAULT)); | |
157 | distribute_list_add_hook (babel_routing_process->distribute_ctx, babel_distribute_update); | |
158 | distribute_list_delete_hook (babel_routing_process->distribute_ctx, babel_distribute_update); | |
159 | return 0; | |
ca10883e DS |
160 | fail: |
161 | XFREE(MTYPE_BABEL, babel_routing_process); | |
ca10883e DS |
162 | return -1; |
163 | } | |
164 | ||
165 | /* thread reading entries form others babel daemons */ | |
cc9f21da | 166 | static void babel_read_protocol(struct thread *thread) |
ca10883e DS |
167 | { |
168 | int rc; | |
f4e14fdb | 169 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
ca10883e DS |
170 | struct interface *ifp = NULL; |
171 | struct sockaddr_in6 sin6; | |
ca10883e DS |
172 | |
173 | assert(babel_routing_process != NULL); | |
174 | assert(protocol_socket >= 0); | |
175 | ||
176 | rc = babel_recv(protocol_socket, | |
177 | receive_buffer, receive_buffer_size, | |
178 | (struct sockaddr*)&sin6, sizeof(sin6)); | |
179 | if(rc < 0) { | |
180 | if(errno != EAGAIN && errno != EINTR) { | |
450971aa | 181 | flog_err_sys(EC_LIB_SOCKET, "recv: %s", safe_strerror(errno)); |
ca10883e DS |
182 | } |
183 | } else { | |
f4e14fdb | 184 | FOR_ALL_INTERFACES(vrf, ifp) { |
ca10883e DS |
185 | if(!if_up(ifp)) |
186 | continue; | |
187 | if(ifp->ifindex == (ifindex_t)sin6.sin6_scope_id) { | |
188 | parse_packet((unsigned char*)&sin6.sin6_addr, ifp, | |
189 | receive_buffer, rc); | |
190 | break; | |
191 | } | |
192 | } | |
193 | } | |
194 | ||
195 | /* re-add thread */ | |
196 | thread_add_read(master, &babel_read_protocol, NULL, protocol_socket, &babel_routing_process->t_read); | |
ca10883e DS |
197 | } |
198 | ||
199 | /* Zebra will give some information, especially about interfaces. This function | |
200 | must be call with a litte timeout wich may give zebra the time to do his job, | |
201 | making these inits have sense. */ | |
cc9f21da | 202 | static void babel_init_routing_process(struct thread *thread) |
ca10883e | 203 | { |
5920b3eb | 204 | myseqno = (frr_weak_random() & 0xFFFF); |
ca10883e DS |
205 | babel_get_myid(); |
206 | babel_load_state_file(); | |
207 | debugf(BABEL_DEBUG_COMMON, "My ID is : %s.", format_eui64(myid)); | |
208 | babel_initial_noise(); | |
209 | babel_main_loop(thread);/* this function self-add to the t_update thread */ | |
ca10883e DS |
210 | } |
211 | ||
212 | /* fill "myid" with an unique id (only if myid != {0}). */ | |
213 | static void | |
214 | babel_get_myid(void) | |
215 | { | |
f4e14fdb | 216 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
ca10883e | 217 | struct interface *ifp = NULL; |
ca10883e DS |
218 | int rc; |
219 | int i; | |
220 | ||
221 | /* if we already have an id (from state file), we return. */ | |
222 | if (memcmp(myid, zeroes, 8) != 0) { | |
223 | return; | |
224 | } | |
225 | ||
f4e14fdb | 226 | FOR_ALL_INTERFACES(vrf, ifp) { |
ca10883e DS |
227 | /* ifp->ifindex is not necessarily valid at this point */ |
228 | int ifindex = if_nametoindex(ifp->name); | |
229 | if(ifindex > 0) { | |
230 | unsigned char eui[8]; | |
edb1d4a0 | 231 | rc = if_eui64(ifindex, eui); |
ca10883e DS |
232 | if(rc < 0) |
233 | continue; | |
234 | memcpy(myid, eui, 8); | |
235 | return; | |
236 | } | |
237 | } | |
238 | ||
239 | /* We failed to get a global EUI64 from the interfaces we were given. | |
240 | Let's try to find an interface with a MAC address. */ | |
241 | for(i = 1; i < 256; i++) { | |
3682bd90 | 242 | char buf[INTERFACE_NAMSIZ], *ifname; |
ca10883e DS |
243 | unsigned char eui[8]; |
244 | ifname = if_indextoname(i, buf); | |
245 | if(ifname == NULL) | |
246 | continue; | |
edb1d4a0 | 247 | rc = if_eui64(i, eui); |
ca10883e DS |
248 | if(rc < 0) |
249 | continue; | |
250 | memcpy(myid, eui, 8); | |
251 | return; | |
252 | } | |
253 | ||
5c997d29 | 254 | flog_err(EC_BABEL_CONFIG, "Couldn't find router id -- using random value."); |
ca10883e DS |
255 | |
256 | rc = read_random_bytes(myid, 8); | |
257 | if(rc < 0) { | |
5b003f31 | 258 | flog_err(EC_BABEL_CONFIG, "read(random): %s (cannot assign an ID)", |
e33b116c | 259 | safe_strerror(errno)); |
ca10883e DS |
260 | exit(1); |
261 | } | |
262 | /* Clear group and global bits */ | |
03b7208c | 263 | UNSET_FLAG (myid[0], 3); |
ca10883e DS |
264 | } |
265 | ||
266 | /* Make some noise so that others notice us, and send retractions in | |
267 | case we were restarted recently */ | |
268 | static void | |
269 | babel_initial_noise(void) | |
270 | { | |
f4e14fdb | 271 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
ca10883e | 272 | struct interface *ifp = NULL; |
ca10883e | 273 | |
f4e14fdb | 274 | FOR_ALL_INTERFACES(vrf, ifp) { |
ca10883e DS |
275 | if(!if_up(ifp)) |
276 | continue; | |
277 | /* Apply jitter before we send the first message. */ | |
278 | usleep(roughly(10000)); | |
279 | gettime(&babel_now); | |
280 | send_hello(ifp); | |
281 | send_wildcard_retraction(ifp); | |
282 | } | |
283 | ||
f4e14fdb | 284 | FOR_ALL_INTERFACES(vrf, ifp) { |
ca10883e DS |
285 | if(!if_up(ifp)) |
286 | continue; | |
287 | usleep(roughly(10000)); | |
288 | gettime(&babel_now); | |
289 | send_hello(ifp); | |
290 | send_wildcard_retraction(ifp); | |
291 | send_self_update(ifp); | |
292 | send_request(ifp, NULL, 0); | |
293 | flushupdates(ifp); | |
294 | flushbuf(ifp); | |
295 | } | |
296 | } | |
297 | ||
298 | /* Delete all the added babel routes, make babeld only speak to zebra. */ | |
299 | static void | |
4d762f26 | 300 | babel_clean_routing_process(void) |
ca10883e DS |
301 | { |
302 | flush_all_routes(); | |
303 | babel_interface_close_all(); | |
304 | ||
b3d6bc6e MS |
305 | /* cancel events */ |
306 | thread_cancel(&babel_routing_process->t_read); | |
307 | thread_cancel(&babel_routing_process->t_update); | |
ca10883e | 308 | |
03a38493 | 309 | distribute_list_delete(&babel_routing_process->distribute_ctx); |
ca10883e | 310 | XFREE(MTYPE_BABEL, babel_routing_process); |
ca10883e DS |
311 | } |
312 | ||
313 | /* Function used with timeout. */ | |
cc9f21da | 314 | static void babel_main_loop(struct thread *thread) |
ca10883e DS |
315 | { |
316 | struct timeval tv; | |
f4e14fdb | 317 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
ca10883e | 318 | struct interface *ifp = NULL; |
ca10883e DS |
319 | |
320 | while(1) { | |
321 | gettime(&babel_now); | |
322 | ||
323 | /* timeouts --------------------------------------------------------- */ | |
324 | /* get the next timeout */ | |
325 | babel_fill_with_next_timeout(&tv); | |
326 | /* if there is no timeout, we must wait. */ | |
327 | if(timeval_compare(&tv, &babel_now) > 0) { | |
328 | timeval_minus(&tv, &tv, &babel_now); | |
a97986ff DL |
329 | debugf(BABEL_DEBUG_TIMEOUT, "babel main loop : timeout: %lld msecs", |
330 | (long long)tv.tv_sec * 1000 + tv.tv_usec / 1000); | |
ca10883e DS |
331 | /* it happens often to have less than 1 ms, it's bad. */ |
332 | timeval_add_msec(&tv, &tv, 300); | |
333 | babel_set_timer(&tv); | |
cc9f21da DS |
334 | return; |
335 | } | |
ca10883e DS |
336 | |
337 | gettime(&babel_now); | |
338 | ||
339 | /* update database -------------------------------------------------- */ | |
340 | if(timeval_compare(&check_neighbours_timeout, &babel_now) < 0) { | |
341 | int msecs; | |
342 | msecs = check_neighbours(); | |
343 | /* Multiply by 3/2 to allow neighbours to expire. */ | |
344 | msecs = MAX(3 * msecs / 2, 10); | |
345 | schedule_neighbours_check(msecs, 1); | |
346 | } | |
347 | ||
348 | if(babel_now.tv_sec >= expiry_time) { | |
349 | expire_routes(); | |
350 | expire_resend(); | |
351 | expiry_time = babel_now.tv_sec + roughly(30); | |
352 | } | |
353 | ||
354 | if(babel_now.tv_sec >= source_expiry_time) { | |
355 | expire_sources(); | |
356 | source_expiry_time = babel_now.tv_sec + roughly(300); | |
357 | } | |
358 | ||
f4e14fdb | 359 | FOR_ALL_INTERFACES(vrf, ifp) { |
ca10883e DS |
360 | babel_interface_nfo *babel_ifp = NULL; |
361 | if(!if_up(ifp)) | |
362 | continue; | |
363 | babel_ifp = babel_get_if_nfo(ifp); | |
364 | if(timeval_compare(&babel_now, &babel_ifp->hello_timeout) >= 0) | |
365 | send_hello(ifp); | |
366 | if(timeval_compare(&babel_now, &babel_ifp->update_timeout) >= 0) | |
367 | send_update(ifp, 0, NULL, 0); | |
368 | if(timeval_compare(&babel_now, | |
369 | &babel_ifp->update_flush_timeout) >= 0) | |
370 | flushupdates(ifp); | |
371 | } | |
372 | ||
373 | if(resend_time.tv_sec != 0) { | |
374 | if(timeval_compare(&babel_now, &resend_time) >= 0) | |
375 | do_resend(); | |
376 | } | |
377 | ||
378 | if(unicast_flush_timeout.tv_sec != 0) { | |
379 | if(timeval_compare(&babel_now, &unicast_flush_timeout) >= 0) | |
380 | flush_unicast(1); | |
381 | } | |
382 | ||
f4e14fdb | 383 | FOR_ALL_INTERFACES(vrf, ifp) { |
ca10883e DS |
384 | babel_interface_nfo *babel_ifp = NULL; |
385 | if(!if_up(ifp)) | |
386 | continue; | |
387 | babel_ifp = babel_get_if_nfo(ifp); | |
388 | if(babel_ifp->flush_timeout.tv_sec != 0) { | |
389 | if(timeval_compare(&babel_now, &babel_ifp->flush_timeout) >= 0) | |
390 | flushbuf(ifp); | |
391 | } | |
392 | } | |
393 | } | |
394 | ||
395 | assert(0); /* this line should never be reach */ | |
396 | } | |
397 | ||
398 | static void | |
399 | printIfMin(struct timeval *tv, int cmd, const char *tag, const char *ifname) | |
400 | { | |
401 | static struct timeval curr_tv; | |
402 | static char buffer[200]; | |
403 | static const char *curr_tag = NULL; | |
404 | ||
405 | switch (cmd) { | |
406 | case 0: /* reset timeval */ | |
407 | curr_tv = *tv; | |
408 | if(ifname != NULL) { | |
409 | snprintf(buffer, 200L, "interface: %s; %s", ifname, tag); | |
410 | curr_tag = buffer; | |
411 | } else { | |
412 | curr_tag = tag; | |
413 | } | |
414 | break; | |
415 | case 1: /* take the min */ | |
416 | if (tv->tv_sec == 0 && tv->tv_usec == 0) { /* if (tv == ∞) */ | |
417 | break; | |
418 | } | |
419 | if (tv->tv_sec < curr_tv.tv_sec ||(tv->tv_sec == curr_tv.tv_sec && | |
420 | tv->tv_usec < curr_tv.tv_usec)) { | |
421 | curr_tv = *tv; | |
422 | if(ifname != NULL) { | |
423 | snprintf(buffer, 200L, "interface: %s; %s", ifname, tag); | |
424 | curr_tag = buffer; | |
425 | } else { | |
426 | curr_tag = tag; | |
427 | } | |
428 | } | |
429 | break; | |
430 | case 2: /* print message */ | |
431 | debugf(BABEL_DEBUG_TIMEOUT, "next timeout due to: %s", curr_tag); | |
432 | break; | |
433 | default: | |
434 | break; | |
435 | } | |
436 | } | |
437 | ||
438 | static void | |
439 | babel_fill_with_next_timeout(struct timeval *tv) | |
440 | { | |
441 | #if (defined NO_DEBUG) | |
442 | #define printIfMin(a,b,c,d) | |
443 | #else | |
444 | #define printIfMin(a,b,c,d) \ | |
445 | if (UNLIKELY(debug & BABEL_DEBUG_TIMEOUT)) {printIfMin(a,b,c,d);} | |
446 | ||
f4e14fdb | 447 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
ca10883e | 448 | struct interface *ifp = NULL; |
ca10883e DS |
449 | |
450 | *tv = check_neighbours_timeout; | |
451 | printIfMin(tv, 0, "check_neighbours_timeout", NULL); | |
452 | timeval_min_sec(tv, expiry_time); | |
453 | printIfMin(tv, 1, "expiry_time", NULL); | |
454 | timeval_min_sec(tv, source_expiry_time); | |
455 | printIfMin(tv, 1, "source_expiry_time", NULL); | |
456 | timeval_min(tv, &resend_time); | |
457 | printIfMin(tv, 1, "resend_time", NULL); | |
f4e14fdb | 458 | FOR_ALL_INTERFACES(vrf, ifp) { |
ca10883e DS |
459 | babel_interface_nfo *babel_ifp = NULL; |
460 | if(!if_up(ifp)) | |
461 | continue; | |
462 | babel_ifp = babel_get_if_nfo(ifp); | |
463 | timeval_min(tv, &babel_ifp->flush_timeout); | |
464 | printIfMin(tv, 1, "flush_timeout", ifp->name); | |
465 | timeval_min(tv, &babel_ifp->hello_timeout); | |
466 | printIfMin(tv, 1, "hello_timeout", ifp->name); | |
467 | timeval_min(tv, &babel_ifp->update_timeout); | |
468 | printIfMin(tv, 1, "update_timeout", ifp->name); | |
469 | timeval_min(tv, &babel_ifp->update_flush_timeout); | |
470 | printIfMin(tv, 1, "update_flush_timeout",ifp->name); | |
471 | } | |
472 | timeval_min(tv, &unicast_flush_timeout); | |
473 | printIfMin(tv, 1, "unicast_flush_timeout", NULL); | |
474 | printIfMin(tv, 2, NULL, NULL); | |
475 | #undef printIfMin | |
476 | #endif | |
477 | } | |
478 | ||
479 | /* set the t_update thread of the babel routing process to be launch in | |
480 | 'timeout' (approximate at the milisecond) */ | |
481 | static void | |
482 | babel_set_timer(struct timeval *timeout) | |
483 | { | |
484 | long msecs = timeout->tv_sec * 1000 + timeout->tv_usec / 1000; | |
b3d6bc6e | 485 | thread_cancel(&(babel_routing_process->t_update)); |
ca10883e DS |
486 | thread_add_timer_msec(master, babel_main_loop, NULL, msecs, &babel_routing_process->t_update); |
487 | } | |
488 | ||
489 | void | |
490 | schedule_neighbours_check(int msecs, int override) | |
491 | { | |
492 | struct timeval timeout; | |
493 | ||
494 | timeval_add_msec(&timeout, &babel_now, msecs); | |
495 | if(override) | |
496 | check_neighbours_timeout = timeout; | |
497 | else | |
498 | timeval_min(&check_neighbours_timeout, &timeout); | |
499 | } | |
500 | ||
501 | int | |
502 | resize_receive_buffer(int size) | |
503 | { | |
504 | if(size <= receive_buffer_size) | |
505 | return 0; | |
506 | ||
507 | if(receive_buffer == NULL) { | |
508 | receive_buffer = malloc(size); | |
509 | if(receive_buffer == NULL) { | |
5b003f31 | 510 | flog_err(EC_BABEL_MEMORY, "malloc(receive_buffer): %s", |
f135ba52 | 511 | safe_strerror(errno)); |
ca10883e DS |
512 | return -1; |
513 | } | |
514 | receive_buffer_size = size; | |
515 | } else { | |
516 | unsigned char *new; | |
517 | new = realloc(receive_buffer, size); | |
518 | if(new == NULL) { | |
5b003f31 | 519 | flog_err(EC_BABEL_MEMORY, "realloc(receive_buffer): %s", |
f135ba52 | 520 | safe_strerror(errno)); |
ca10883e DS |
521 | return -1; |
522 | } | |
523 | receive_buffer = new; | |
524 | receive_buffer_size = size; | |
525 | } | |
526 | return 1; | |
527 | } | |
528 | ||
529 | static void | |
03a38493 | 530 | babel_distribute_update (struct distribute_ctx *ctx, struct distribute *dist) |
ca10883e DS |
531 | { |
532 | struct interface *ifp; | |
533 | babel_interface_nfo *babel_ifp; | |
534 | int type; | |
535 | int family; | |
536 | ||
537 | if (! dist->ifname) | |
538 | return; | |
539 | ||
a36898e7 | 540 | ifp = if_lookup_by_name (dist->ifname, VRF_DEFAULT); |
ca10883e DS |
541 | if (ifp == NULL) |
542 | return; | |
543 | ||
544 | babel_ifp = babel_get_if_nfo(ifp); | |
545 | ||
546 | for (type = 0; type < DISTRIBUTE_MAX; type++) { | |
547 | family = type == DISTRIBUTE_V4_IN || type == DISTRIBUTE_V4_OUT ? | |
548 | AFI_IP : AFI_IP6; | |
549 | if (dist->list[type]) | |
550 | babel_ifp->list[type] = access_list_lookup (family, | |
551 | dist->list[type]); | |
552 | else | |
553 | babel_ifp->list[type] = NULL; | |
554 | if (dist->prefix[type]) | |
555 | babel_ifp->prefix[type] = prefix_list_lookup (family, | |
556 | dist->prefix[type]); | |
557 | else | |
558 | babel_ifp->prefix[type] = NULL; | |
559 | } | |
560 | } | |
561 | ||
562 | static void | |
563 | babel_distribute_update_interface (struct interface *ifp) | |
564 | { | |
03a38493 | 565 | struct distribute *dist = NULL; |
ca10883e | 566 | |
03a38493 PG |
567 | if (babel_routing_process) |
568 | dist = distribute_lookup(babel_routing_process->distribute_ctx, ifp->name); | |
ca10883e | 569 | if (dist) |
03a38493 | 570 | babel_distribute_update (babel_routing_process->distribute_ctx, dist); |
ca10883e DS |
571 | } |
572 | ||
573 | /* Update all interface's distribute list. */ | |
574 | static void | |
575 | babel_distribute_update_all (struct prefix_list *notused) | |
576 | { | |
f4e14fdb | 577 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
ca10883e | 578 | struct interface *ifp; |
ca10883e | 579 | |
451fda4f | 580 | FOR_ALL_INTERFACES (vrf, ifp) |
ca10883e DS |
581 | babel_distribute_update_interface (ifp); |
582 | } | |
583 | ||
584 | static void | |
585 | babel_distribute_update_all_wrapper (struct access_list *notused) | |
586 | { | |
587 | babel_distribute_update_all(NULL); | |
588 | } | |
589 | ||
590 | ||
591 | /* [Command] */ | |
f84d11d1 DS |
592 | DEFUN_NOSH (router_babel, |
593 | router_babel_cmd, | |
594 | "router babel", | |
595 | "Enable a routing process\n" | |
596 | "Make Babel instance command\n") | |
ca10883e DS |
597 | { |
598 | int ret; | |
599 | ||
600 | vty->node = BABEL_NODE; | |
601 | ||
602 | if (!babel_routing_process) { | |
603 | ret = babel_create_routing_process (); | |
604 | ||
605 | /* Notice to user we couldn't create Babel. */ | |
606 | if (ret < 0) { | |
607 | zlog_warn ("can't create Babel"); | |
608 | return CMD_WARNING; | |
609 | } | |
610 | } | |
611 | ||
612 | return CMD_SUCCESS; | |
613 | } | |
614 | ||
615 | /* [Command] */ | |
616 | DEFUN (no_router_babel, | |
617 | no_router_babel_cmd, | |
618 | "no router babel", | |
619 | NO_STR | |
620 | "Disable a routing process\n" | |
7111c1a0 | 621 | "Remove Babel instance command\n") |
ca10883e DS |
622 | { |
623 | if(babel_routing_process) | |
624 | babel_clean_routing_process(); | |
625 | return CMD_SUCCESS; | |
626 | } | |
627 | ||
628 | /* [Babel Command] */ | |
629 | DEFUN (babel_diversity, | |
630 | babel_diversity_cmd, | |
631 | "babel diversity", | |
632 | "Babel commands\n" | |
633 | "Enable diversity-aware routing.\n") | |
634 | { | |
635 | diversity_kind = DIVERSITY_CHANNEL; | |
636 | return CMD_SUCCESS; | |
637 | } | |
638 | ||
639 | /* [Babel Command] */ | |
640 | DEFUN (no_babel_diversity, | |
641 | no_babel_diversity_cmd, | |
642 | "no babel diversity", | |
643 | NO_STR | |
644 | "Babel commands\n" | |
645 | "Disable diversity-aware routing.\n") | |
646 | { | |
647 | diversity_kind = DIVERSITY_NONE; | |
648 | return CMD_SUCCESS; | |
649 | } | |
650 | ||
651 | /* [Babel Command] */ | |
9affd464 | 652 | DEFPY (babel_diversity_factor, |
ca10883e | 653 | babel_diversity_factor_cmd, |
9affd464 YZ |
654 | "[no] babel diversity-factor (1-256)$factor", |
655 | NO_STR | |
ca10883e DS |
656 | "Babel commands\n" |
657 | "Set the diversity factor.\n" | |
658 | "Factor in units of 1/256.\n") | |
659 | { | |
9affd464 | 660 | diversity_factor = no ? BABEL_DEFAULT_DIVERSITY_FACTOR : factor; |
ca10883e DS |
661 | return CMD_SUCCESS; |
662 | } | |
663 | ||
664 | /* [Babel Command] */ | |
9affd464 | 665 | DEFPY (babel_set_resend_delay, |
ca10883e | 666 | babel_set_resend_delay_cmd, |
9affd464 YZ |
667 | "[no] babel resend-delay (20-655340)$delay", |
668 | NO_STR | |
ca10883e DS |
669 | "Babel commands\n" |
670 | "Time before resending a message\n" | |
671 | "Milliseconds\n") | |
672 | { | |
9affd464 | 673 | resend_delay = no ? BABEL_DEFAULT_RESEND_DELAY : delay; |
ca10883e DS |
674 | return CMD_SUCCESS; |
675 | } | |
676 | ||
677 | /* [Babel Command] */ | |
9affd464 | 678 | DEFPY (babel_set_smoothing_half_life, |
ca10883e | 679 | babel_set_smoothing_half_life_cmd, |
9affd464 YZ |
680 | "[no] babel smoothing-half-life (0-65534)$seconds", |
681 | NO_STR | |
ca10883e DS |
682 | "Babel commands\n" |
683 | "Smoothing half-life\n" | |
684 | "Seconds (0 to disable)\n") | |
685 | { | |
9affd464 YZ |
686 | change_smoothing_half_life(no ? BABEL_DEFAULT_SMOOTHING_HALF_LIFE |
687 | : seconds); | |
ca10883e DS |
688 | return CMD_SUCCESS; |
689 | } | |
690 | ||
32282a6e DS |
691 | DEFUN (babel_distribute_list, |
692 | babel_distribute_list_cmd, | |
c60dec36 | 693 | "distribute-list [prefix] ACCESSLIST4_NAME <in|out> [WORD]", |
32282a6e DS |
694 | "Filter networks in routing updates\n" |
695 | "Specify a prefix\n" | |
696 | "Access-list name\n" | |
697 | "Filter incoming routing updates\n" | |
698 | "Filter outgoing routing updates\n" | |
699 | "Interface name\n") | |
700 | { | |
701 | const char *ifname = NULL; | |
702 | int prefix = (argv[1]->type == WORD_TKN) ? 1 : 0; | |
703 | ||
704 | if (argv[argc - 1]->type == VARIABLE_TKN) | |
705 | ifname = argv[argc - 1]->arg; | |
706 | ||
707 | return distribute_list_parser(prefix, true, argv[2 + prefix]->text, | |
708 | argv[1 + prefix]->arg, ifname); | |
709 | } | |
710 | ||
711 | DEFUN (babel_no_distribute_list, | |
712 | babel_no_distribute_list_cmd, | |
c60dec36 | 713 | "no distribute-list [prefix] ACCESSLIST4_NAME <in|out> [WORD]", |
32282a6e DS |
714 | NO_STR |
715 | "Filter networks in routing updates\n" | |
716 | "Specify a prefix\n" | |
717 | "Access-list name\n" | |
718 | "Filter incoming routing updates\n" | |
719 | "Filter outgoing routing updates\n" | |
720 | "Interface name\n") | |
721 | { | |
722 | const char *ifname = NULL; | |
723 | int prefix = (argv[2]->type == WORD_TKN) ? 1 : 0; | |
724 | ||
725 | if (argv[argc - 1]->type == VARIABLE_TKN) | |
726 | ifname = argv[argc - 1]->arg; | |
727 | ||
728 | return distribute_list_no_parser(vty, prefix, true, | |
729 | argv[3 + prefix]->text, | |
730 | argv[2 + prefix]->arg, ifname); | |
731 | } | |
732 | ||
733 | DEFUN (babel_ipv6_distribute_list, | |
734 | babel_ipv6_distribute_list_cmd, | |
c60dec36 | 735 | "ipv6 distribute-list [prefix] ACCESSLIST6_NAME <in|out> [WORD]", |
32282a6e DS |
736 | "IPv6\n" |
737 | "Filter networks in routing updates\n" | |
738 | "Specify a prefix\n" | |
739 | "Access-list name\n" | |
740 | "Filter incoming routing updates\n" | |
741 | "Filter outgoing routing updates\n" | |
742 | "Interface name\n") | |
743 | { | |
744 | const char *ifname = NULL; | |
745 | int prefix = (argv[2]->type == WORD_TKN) ? 1 : 0; | |
746 | ||
747 | if (argv[argc - 1]->type == VARIABLE_TKN) | |
748 | ifname = argv[argc - 1]->arg; | |
749 | ||
750 | return distribute_list_parser(prefix, false, argv[3 + prefix]->text, | |
751 | argv[2 + prefix]->arg, ifname); | |
752 | } | |
753 | ||
754 | DEFUN (babel_no_ipv6_distribute_list, | |
755 | babel_no_ipv6_distribute_list_cmd, | |
c60dec36 | 756 | "no ipv6 distribute-list [prefix] ACCESSLIST6_NAME <in|out> [WORD]", |
32282a6e DS |
757 | NO_STR |
758 | "IPv6\n" | |
759 | "Filter networks in routing updates\n" | |
760 | "Specify a prefix\n" | |
761 | "Access-list name\n" | |
762 | "Filter incoming routing updates\n" | |
763 | "Filter outgoing routing updates\n" | |
764 | "Interface name\n") | |
765 | { | |
766 | const char *ifname = NULL; | |
767 | int prefix = (argv[3]->type == WORD_TKN) ? 1 : 0; | |
768 | ||
769 | if (argv[argc - 1]->type == VARIABLE_TKN) | |
770 | ifname = argv[argc - 1]->arg; | |
771 | ||
772 | return distribute_list_no_parser(vty, prefix, false, | |
773 | argv[4 + prefix]->text, | |
774 | argv[3 + prefix]->arg, ifname); | |
775 | } | |
776 | ||
ca10883e DS |
777 | void |
778 | babeld_quagga_init(void) | |
779 | { | |
780 | ||
612c2c15 | 781 | install_node(&cmd_babel_node); |
ca10883e DS |
782 | |
783 | install_element(CONFIG_NODE, &router_babel_cmd); | |
784 | install_element(CONFIG_NODE, &no_router_babel_cmd); | |
785 | ||
786 | install_default(BABEL_NODE); | |
787 | install_element(BABEL_NODE, &babel_diversity_cmd); | |
788 | install_element(BABEL_NODE, &no_babel_diversity_cmd); | |
789 | install_element(BABEL_NODE, &babel_diversity_factor_cmd); | |
790 | install_element(BABEL_NODE, &babel_set_resend_delay_cmd); | |
791 | install_element(BABEL_NODE, &babel_set_smoothing_half_life_cmd); | |
792 | ||
32282a6e DS |
793 | install_element(BABEL_NODE, &babel_distribute_list_cmd); |
794 | install_element(BABEL_NODE, &babel_no_distribute_list_cmd); | |
795 | install_element(BABEL_NODE, &babel_ipv6_distribute_list_cmd); | |
796 | install_element(BABEL_NODE, &babel_no_ipv6_distribute_list_cmd); | |
797 | ||
cfc369c4 | 798 | vrf_cmd_init(NULL); |
f5eef2d5 | 799 | |
ca10883e DS |
800 | babel_if_init(); |
801 | ||
802 | /* Access list install. */ | |
803 | access_list_init (); | |
804 | access_list_add_hook (babel_distribute_update_all_wrapper); | |
805 | access_list_delete_hook (babel_distribute_update_all_wrapper); | |
806 | ||
807 | /* Prefix list initialize.*/ | |
808 | prefix_list_init (); | |
809 | prefix_list_add_hook (babel_distribute_update_all); | |
810 | prefix_list_delete_hook (babel_distribute_update_all); | |
ca10883e DS |
811 | } |
812 | ||
813 | /* Stubs to adapt Babel's filtering calls to Quagga's infrastructure. */ | |
814 | ||
815 | int | |
816 | input_filter(const unsigned char *id, | |
817 | const unsigned char *prefix, unsigned short plen, | |
818 | const unsigned char *neigh, unsigned int ifindex) | |
819 | { | |
820 | return babel_filter(0, prefix, plen, ifindex); | |
821 | } | |
822 | ||
823 | int | |
824 | output_filter(const unsigned char *id, const unsigned char *prefix, | |
825 | unsigned short plen, unsigned int ifindex) | |
826 | { | |
827 | return babel_filter(1, prefix, plen, ifindex); | |
828 | } | |
829 | ||
830 | /* There's no redistribute filter in Quagga -- the zebra daemon does its | |
831 | own filtering. */ | |
832 | int | |
833 | redistribute_filter(const unsigned char *prefix, unsigned short plen, | |
834 | unsigned int ifindex, int proto) | |
835 | { | |
836 | return 0; | |
837 | } | |
838 | ||
03a38493 PG |
839 | struct babel *babel_lookup(void) |
840 | { | |
841 | return babel_routing_process; | |
842 | } |