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12e41d03 DL |
1 | /* |
2 | PIM for Quagga | |
3 | Copyright (C) 2008 Everton da Silva Marques | |
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 | |
12e41d03 DL |
19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
23 | #include "log.h" | |
744d91b3 | 24 | #include "if.h" |
12e41d03 DL |
25 | |
26 | #include "pimd.h" | |
27 | #include "pim_pim.h" | |
28 | #include "pim_str.h" | |
29 | #include "pim_tlv.h" | |
30 | #include "pim_util.h" | |
31 | #include "pim_hello.h" | |
32 | #include "pim_iface.h" | |
33 | #include "pim_neighbor.h" | |
34 | #include "pim_upstream.h" | |
35 | ||
36 | static void on_trace(const char *label, | |
37 | struct interface *ifp, struct in_addr src) | |
38 | { | |
39 | if (PIM_DEBUG_PIM_TRACE) { | |
eaa54bdb | 40 | char src_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
41 | pim_inet4_dump("<src?>", src, src_str, sizeof(src_str)); |
42 | zlog_debug("%s: from %s on %s", | |
43 | label, src_str, ifp->name); | |
44 | } | |
45 | } | |
46 | ||
47 | static void tlv_trace_bool(const char *label, const char *tlv_name, | |
48 | const char *ifname, struct in_addr src_addr, | |
49 | int isset, int value) | |
50 | { | |
51 | if (isset) { | |
eaa54bdb | 52 | char src_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
53 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); |
54 | zlog_debug("%s: PIM hello option from %s on interface %s: %s=%d", | |
55 | label, | |
56 | src_str, ifname, | |
57 | tlv_name, value); | |
58 | } | |
59 | } | |
60 | ||
61 | static void tlv_trace_uint16(const char *label, const char *tlv_name, | |
62 | const char *ifname, struct in_addr src_addr, | |
63 | int isset, uint16_t value) | |
64 | { | |
65 | if (isset) { | |
eaa54bdb | 66 | char src_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
67 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); |
68 | zlog_debug("%s: PIM hello option from %s on interface %s: %s=%u", | |
69 | label, | |
70 | src_str, ifname, | |
71 | tlv_name, value); | |
72 | } | |
73 | } | |
74 | ||
75 | static void tlv_trace_uint32(const char *label, const char *tlv_name, | |
76 | const char *ifname, struct in_addr src_addr, | |
77 | int isset, uint32_t value) | |
78 | { | |
79 | if (isset) { | |
eaa54bdb | 80 | char src_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
81 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); |
82 | zlog_debug("%s: PIM hello option from %s on interface %s: %s=%u", | |
83 | label, | |
84 | src_str, ifname, | |
85 | tlv_name, value); | |
86 | } | |
87 | } | |
88 | ||
89 | static void tlv_trace_uint32_hex(const char *label, const char *tlv_name, | |
90 | const char *ifname, struct in_addr src_addr, | |
91 | int isset, uint32_t value) | |
92 | { | |
93 | if (isset) { | |
eaa54bdb | 94 | char src_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
95 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); |
96 | zlog_debug("%s: PIM hello option from %s on interface %s: %s=%08x", | |
97 | label, | |
98 | src_str, ifname, | |
99 | tlv_name, value); | |
100 | } | |
101 | } | |
102 | ||
103 | #if 0 | |
104 | static void tlv_trace(const char *label, const char *tlv_name, | |
105 | const char *ifname, struct in_addr src_addr, | |
106 | int isset) | |
107 | { | |
108 | if (isset) { | |
eaa54bdb | 109 | char src_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
110 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); |
111 | zlog_debug("%s: PIM hello option from %s on interface %s: %s", | |
112 | label, | |
113 | src_str, ifname, | |
114 | tlv_name); | |
115 | } | |
116 | } | |
117 | #endif | |
118 | ||
119 | static void tlv_trace_list(const char *label, const char *tlv_name, | |
120 | const char *ifname, struct in_addr src_addr, | |
121 | int isset, struct list *addr_list) | |
122 | { | |
123 | if (isset) { | |
eaa54bdb | 124 | char src_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
125 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); |
126 | zlog_debug("%s: PIM hello option from %s on interface %s: %s size=%d list=%p", | |
127 | label, | |
128 | src_str, ifname, | |
129 | tlv_name, | |
130 | addr_list ? ((int) listcount(addr_list)) : -1, | |
131 | (void *) addr_list); | |
132 | } | |
133 | } | |
134 | ||
135 | #define FREE_ADDR_LIST \ | |
136 | if (hello_option_addr_list) { \ | |
137 | list_delete(hello_option_addr_list); \ | |
138 | } | |
139 | ||
140 | #define FREE_ADDR_LIST_THEN_RETURN(code) \ | |
141 | { \ | |
142 | FREE_ADDR_LIST \ | |
143 | return (code); \ | |
144 | } | |
145 | ||
146 | int pim_hello_recv(struct interface *ifp, | |
147 | struct in_addr src_addr, | |
148 | uint8_t *tlv_buf, int tlv_buf_size) | |
149 | { | |
150 | struct pim_interface *pim_ifp; | |
151 | struct pim_neighbor *neigh; | |
152 | uint8_t *tlv_curr; | |
153 | uint8_t *tlv_pastend; | |
154 | pim_hello_options hello_options = 0; /* bit array recording options found */ | |
155 | uint16_t hello_option_holdtime = 0; | |
156 | uint16_t hello_option_propagation_delay = 0; | |
157 | uint16_t hello_option_override_interval = 0; | |
158 | uint32_t hello_option_dr_priority = 0; | |
159 | uint32_t hello_option_generation_id = 0; | |
160 | struct list *hello_option_addr_list = 0; | |
161 | ||
aea6cb94 DS |
162 | if (PIM_DEBUG_PIM_HELLO) |
163 | on_trace(__PRETTY_FUNCTION__, ifp, src_addr); | |
12e41d03 DL |
164 | |
165 | pim_ifp = ifp->info; | |
166 | zassert(pim_ifp); | |
167 | ||
168 | ++pim_ifp->pim_ifstat_hello_recv; | |
169 | ||
170 | /* | |
171 | Parse PIM hello TLVs | |
172 | */ | |
173 | zassert(tlv_buf_size >= 0); | |
174 | tlv_curr = tlv_buf; | |
175 | tlv_pastend = tlv_buf + tlv_buf_size; | |
176 | ||
177 | while (tlv_curr < tlv_pastend) { | |
178 | uint16_t option_type; | |
179 | uint16_t option_len; | |
180 | int remain = tlv_pastend - tlv_curr; | |
181 | ||
182 | if (remain < PIM_TLV_MIN_SIZE) { | |
aea6cb94 | 183 | if (PIM_DEBUG_PIM_HELLO) { |
eaa54bdb | 184 | char src_str[INET_ADDRSTRLEN]; |
aea6cb94 DS |
185 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); |
186 | zlog_debug("%s: short PIM hello TLV size=%d < min=%d from %s on interface %s", | |
187 | __PRETTY_FUNCTION__, | |
188 | remain, PIM_TLV_MIN_SIZE, | |
189 | src_str, ifp->name); | |
190 | } | |
12e41d03 DL |
191 | FREE_ADDR_LIST_THEN_RETURN(-1); |
192 | } | |
193 | ||
194 | option_type = PIM_TLV_GET_TYPE(tlv_curr); | |
195 | tlv_curr += PIM_TLV_TYPE_SIZE; | |
196 | option_len = PIM_TLV_GET_LENGTH(tlv_curr); | |
197 | tlv_curr += PIM_TLV_LENGTH_SIZE; | |
198 | ||
199 | if ((tlv_curr + option_len) > tlv_pastend) { | |
aea6cb94 | 200 | if (PIM_DEBUG_PIM_HELLO) { |
eaa54bdb | 201 | char src_str[INET_ADDRSTRLEN]; |
aea6cb94 DS |
202 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); |
203 | zlog_debug("%s: long PIM hello TLV type=%d length=%d > left=%td from %s on interface %s", | |
204 | __PRETTY_FUNCTION__, | |
205 | option_type, option_len, tlv_pastend - tlv_curr, | |
206 | src_str, ifp->name); | |
207 | } | |
12e41d03 DL |
208 | FREE_ADDR_LIST_THEN_RETURN(-2); |
209 | } | |
210 | ||
aea6cb94 | 211 | if (PIM_DEBUG_PIM_HELLO) { |
eaa54bdb | 212 | char src_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
213 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); |
214 | zlog_debug("%s: parse left_size=%d: PIM hello TLV type=%d length=%d from %s on %s", | |
215 | __PRETTY_FUNCTION__, | |
216 | remain, | |
217 | option_type, option_len, | |
218 | src_str, ifp->name); | |
219 | } | |
220 | ||
221 | switch (option_type) { | |
222 | case PIM_MSG_OPTION_TYPE_HOLDTIME: | |
223 | if (pim_tlv_parse_holdtime(ifp->name, src_addr, | |
224 | &hello_options, | |
225 | &hello_option_holdtime, | |
226 | option_len, | |
227 | tlv_curr)) { | |
228 | FREE_ADDR_LIST_THEN_RETURN(-3); | |
229 | } | |
230 | break; | |
231 | case PIM_MSG_OPTION_TYPE_LAN_PRUNE_DELAY: | |
232 | if (pim_tlv_parse_lan_prune_delay(ifp->name, src_addr, | |
233 | &hello_options, | |
234 | &hello_option_propagation_delay, | |
235 | &hello_option_override_interval, | |
236 | option_len, | |
237 | tlv_curr)) { | |
238 | FREE_ADDR_LIST_THEN_RETURN(-4); | |
239 | } | |
240 | break; | |
241 | case PIM_MSG_OPTION_TYPE_DR_PRIORITY: | |
242 | if (pim_tlv_parse_dr_priority(ifp->name, src_addr, | |
243 | &hello_options, | |
244 | &hello_option_dr_priority, | |
245 | option_len, | |
246 | tlv_curr)) { | |
247 | FREE_ADDR_LIST_THEN_RETURN(-5); | |
248 | } | |
249 | break; | |
250 | case PIM_MSG_OPTION_TYPE_GENERATION_ID: | |
251 | if (pim_tlv_parse_generation_id(ifp->name, src_addr, | |
252 | &hello_options, | |
253 | &hello_option_generation_id, | |
254 | option_len, | |
255 | tlv_curr)) { | |
256 | FREE_ADDR_LIST_THEN_RETURN(-6); | |
257 | } | |
258 | break; | |
259 | case PIM_MSG_OPTION_TYPE_ADDRESS_LIST: | |
260 | if (pim_tlv_parse_addr_list(ifp->name, src_addr, | |
261 | &hello_options, | |
262 | &hello_option_addr_list, | |
263 | option_len, | |
264 | tlv_curr)) { | |
265 | return -7; | |
266 | } | |
267 | break; | |
268 | case PIM_MSG_OPTION_TYPE_DM_STATE_REFRESH: | |
aea6cb94 | 269 | if (PIM_DEBUG_PIM_HELLO) { |
eaa54bdb | 270 | char src_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
271 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); |
272 | zlog_debug("%s: ignoring PIM hello dense-mode state refresh TLV option type=%d length=%d from %s on interface %s", | |
273 | __PRETTY_FUNCTION__, | |
274 | option_type, option_len, | |
275 | src_str, ifp->name); | |
276 | } | |
277 | break; | |
278 | default: | |
aea6cb94 | 279 | if (PIM_DEBUG_PIM_HELLO) { |
eaa54bdb | 280 | char src_str[INET_ADDRSTRLEN]; |
12e41d03 | 281 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); |
aea6cb94 DS |
282 | zlog_debug("%s: ignoring unknown PIM hello TLV type=%d length=%d from %s on interface %s", |
283 | __PRETTY_FUNCTION__, | |
284 | option_type, option_len, | |
285 | src_str, ifp->name); | |
12e41d03 DL |
286 | } |
287 | } | |
288 | ||
289 | tlv_curr += option_len; | |
290 | } | |
291 | ||
292 | /* | |
293 | Check received PIM hello options | |
294 | */ | |
295 | ||
aea6cb94 | 296 | if (PIM_DEBUG_PIM_HELLO) { |
12e41d03 DL |
297 | tlv_trace_uint16(__PRETTY_FUNCTION__, "holdtime", |
298 | ifp->name, src_addr, | |
299 | PIM_OPTION_IS_SET(hello_options, PIM_OPTION_MASK_HOLDTIME), | |
300 | hello_option_holdtime); | |
301 | tlv_trace_uint16(__PRETTY_FUNCTION__, "propagation_delay", | |
302 | ifp->name, src_addr, | |
303 | PIM_OPTION_IS_SET(hello_options, PIM_OPTION_MASK_LAN_PRUNE_DELAY), | |
304 | hello_option_propagation_delay); | |
305 | tlv_trace_uint16(__PRETTY_FUNCTION__, "override_interval", | |
306 | ifp->name, src_addr, | |
307 | PIM_OPTION_IS_SET(hello_options, PIM_OPTION_MASK_LAN_PRUNE_DELAY), | |
308 | hello_option_override_interval); | |
309 | tlv_trace_bool(__PRETTY_FUNCTION__, "can_disable_join_suppression", | |
310 | ifp->name, src_addr, | |
311 | PIM_OPTION_IS_SET(hello_options, PIM_OPTION_MASK_LAN_PRUNE_DELAY), | |
312 | PIM_OPTION_IS_SET(hello_options, PIM_OPTION_MASK_CAN_DISABLE_JOIN_SUPPRESSION)); | |
313 | tlv_trace_uint32(__PRETTY_FUNCTION__, "dr_priority", | |
314 | ifp->name, src_addr, | |
315 | PIM_OPTION_IS_SET(hello_options, PIM_OPTION_MASK_DR_PRIORITY), | |
316 | hello_option_dr_priority); | |
317 | tlv_trace_uint32_hex(__PRETTY_FUNCTION__, "generation_id", | |
318 | ifp->name, src_addr, | |
319 | PIM_OPTION_IS_SET(hello_options, PIM_OPTION_MASK_GENERATION_ID), | |
320 | hello_option_generation_id); | |
321 | tlv_trace_list(__PRETTY_FUNCTION__, "address_list", | |
322 | ifp->name, src_addr, | |
323 | PIM_OPTION_IS_SET(hello_options, PIM_OPTION_MASK_ADDRESS_LIST), | |
324 | hello_option_addr_list); | |
325 | } | |
326 | ||
327 | if (!PIM_OPTION_IS_SET(hello_options, PIM_OPTION_MASK_HOLDTIME)) { | |
aea6cb94 | 328 | if (PIM_DEBUG_PIM_HELLO) { |
eaa54bdb | 329 | char src_str[INET_ADDRSTRLEN]; |
aea6cb94 DS |
330 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); |
331 | zlog_debug("%s: PIM hello missing holdtime from %s on interface %s", | |
332 | __PRETTY_FUNCTION__, | |
333 | src_str, ifp->name); | |
334 | } | |
12e41d03 DL |
335 | } |
336 | ||
337 | /* | |
338 | New neighbor? | |
339 | */ | |
340 | ||
341 | neigh = pim_neighbor_find(ifp, src_addr); | |
342 | if (!neigh) { | |
343 | /* Add as new neighbor */ | |
344 | ||
345 | neigh = pim_neighbor_add(ifp, src_addr, | |
346 | hello_options, | |
347 | hello_option_holdtime, | |
348 | hello_option_propagation_delay, | |
349 | hello_option_override_interval, | |
350 | hello_option_dr_priority, | |
351 | hello_option_generation_id, | |
1148de0a DS |
352 | hello_option_addr_list, |
353 | PIM_NEIGHBOR_SEND_DELAY); | |
12e41d03 | 354 | if (!neigh) { |
aea6cb94 | 355 | if (PIM_DEBUG_PIM_HELLO) { |
eaa54bdb | 356 | char src_str[INET_ADDRSTRLEN]; |
aea6cb94 DS |
357 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); |
358 | zlog_warn("%s: failure creating PIM neighbor %s on interface %s", | |
359 | __PRETTY_FUNCTION__, | |
360 | src_str, ifp->name); | |
361 | } | |
12e41d03 DL |
362 | FREE_ADDR_LIST_THEN_RETURN(-8); |
363 | } | |
364 | ||
365 | /* actual addr list has been saved under neighbor */ | |
366 | return 0; | |
367 | } | |
368 | ||
369 | /* | |
370 | Received generation ID ? | |
371 | */ | |
372 | ||
373 | if (PIM_OPTION_IS_SET(hello_options, PIM_OPTION_MASK_GENERATION_ID)) { | |
374 | /* GenID mismatch ? */ | |
375 | if (!PIM_OPTION_IS_SET(neigh->hello_options, PIM_OPTION_MASK_GENERATION_ID) || | |
376 | (hello_option_generation_id != neigh->generation_id)) { | |
12e41d03 DL |
377 | /* GenID mismatch, then replace neighbor */ |
378 | ||
aea6cb94 | 379 | if (PIM_DEBUG_PIM_HELLO) { |
eaa54bdb | 380 | char src_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
381 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); |
382 | zlog_debug("%s: GenId mismatch new=%08x old=%08x: replacing neighbor %s on %s", | |
383 | __PRETTY_FUNCTION__, | |
384 | hello_option_generation_id, | |
385 | neigh->generation_id, | |
386 | src_str, ifp->name); | |
387 | } | |
388 | ||
389 | pim_upstream_rpf_genid_changed(neigh->source_addr); | |
390 | ||
391 | pim_neighbor_delete(ifp, neigh, "GenID mismatch"); | |
392 | neigh = pim_neighbor_add(ifp, src_addr, | |
393 | hello_options, | |
394 | hello_option_holdtime, | |
395 | hello_option_propagation_delay, | |
396 | hello_option_override_interval, | |
397 | hello_option_dr_priority, | |
398 | hello_option_generation_id, | |
1148de0a DS |
399 | hello_option_addr_list, |
400 | PIM_NEIGHBOR_SEND_NOW); | |
12e41d03 | 401 | if (!neigh) { |
aea6cb94 | 402 | if (PIM_DEBUG_PIM_HELLO) { |
eaa54bdb | 403 | char src_str[INET_ADDRSTRLEN]; |
aea6cb94 DS |
404 | pim_inet4_dump("<src?>", src_addr, src_str, sizeof(src_str)); |
405 | zlog_debug("%s: failure re-creating PIM neighbor %s on interface %s", | |
406 | __PRETTY_FUNCTION__, | |
407 | src_str, ifp->name); | |
408 | } | |
12e41d03 DL |
409 | FREE_ADDR_LIST_THEN_RETURN(-9); |
410 | } | |
411 | /* actual addr list is saved under neighbor */ | |
412 | return 0; | |
413 | ||
414 | } /* GenId mismatch: replace neighbor */ | |
415 | ||
416 | } /* GenId received */ | |
417 | ||
418 | /* | |
419 | Update existing neighbor | |
420 | */ | |
421 | ||
422 | pim_neighbor_update(neigh, | |
423 | hello_options, | |
424 | hello_option_holdtime, | |
425 | hello_option_dr_priority, | |
426 | hello_option_addr_list); | |
427 | /* actual addr list is saved under neighbor */ | |
428 | return 0; | |
429 | } | |
430 | ||
431 | int pim_hello_build_tlv(const char *ifname, | |
432 | uint8_t *tlv_buf, int tlv_buf_size, | |
433 | uint16_t holdtime, | |
434 | uint32_t dr_priority, | |
435 | uint32_t generation_id, | |
436 | uint16_t propagation_delay, | |
437 | uint16_t override_interval, | |
438 | int can_disable_join_suppression, | |
439 | struct list *ifconnected) | |
440 | { | |
441 | uint8_t *curr = tlv_buf; | |
442 | uint8_t *pastend = tlv_buf + tlv_buf_size; | |
443 | uint8_t *tmp; | |
444 | ||
445 | /* | |
446 | * Append options | |
447 | */ | |
448 | ||
449 | /* Holdtime */ | |
450 | curr = pim_tlv_append_uint16(curr, | |
451 | pastend, | |
452 | PIM_MSG_OPTION_TYPE_HOLDTIME, | |
453 | holdtime); | |
454 | if (!curr) { | |
aea6cb94 DS |
455 | if (PIM_DEBUG_PIM_HELLO) { |
456 | zlog_debug("%s: could not set PIM hello Holdtime option for interface %s", | |
457 | __PRETTY_FUNCTION__, ifname); | |
458 | } | |
12e41d03 DL |
459 | return -1; |
460 | } | |
461 | ||
462 | /* LAN Prune Delay */ | |
463 | tmp = pim_tlv_append_2uint16(curr, | |
464 | pastend, | |
465 | PIM_MSG_OPTION_TYPE_LAN_PRUNE_DELAY, | |
466 | propagation_delay, | |
467 | override_interval); | |
468 | if (!tmp) { | |
aea6cb94 DS |
469 | if (PIM_DEBUG_PIM_HELLO) { |
470 | zlog_debug("%s: could not set PIM LAN Prune Delay option for interface %s", | |
471 | __PRETTY_FUNCTION__, ifname); | |
472 | } | |
12e41d03 DL |
473 | return -1; |
474 | } | |
475 | if (can_disable_join_suppression) { | |
476 | *((uint8_t*)(curr) + 4) |= 0x80; /* enable T bit */ | |
477 | } | |
478 | curr = tmp; | |
479 | ||
480 | /* DR Priority */ | |
481 | curr = pim_tlv_append_uint32(curr, | |
482 | pastend, | |
483 | PIM_MSG_OPTION_TYPE_DR_PRIORITY, | |
484 | dr_priority); | |
485 | if (!curr) { | |
aea6cb94 DS |
486 | if (PIM_DEBUG_PIM_HELLO) { |
487 | zlog_debug("%s: could not set PIM hello DR Priority option for interface %s", | |
488 | __PRETTY_FUNCTION__, ifname); | |
489 | } | |
12e41d03 DL |
490 | return -2; |
491 | } | |
492 | ||
493 | /* Generation ID */ | |
494 | curr = pim_tlv_append_uint32(curr, | |
495 | pastend, | |
496 | PIM_MSG_OPTION_TYPE_GENERATION_ID, | |
497 | generation_id); | |
498 | if (!curr) { | |
aea6cb94 DS |
499 | if (PIM_DEBUG_PIM_HELLO) { |
500 | zlog_debug("%s: could not set PIM hello Generation ID option for interface %s", | |
501 | __PRETTY_FUNCTION__, ifname); | |
502 | } | |
12e41d03 DL |
503 | return -3; |
504 | } | |
505 | ||
506 | /* Secondary Address List */ | |
507 | if (ifconnected) { | |
508 | curr = pim_tlv_append_addrlist_ucast(curr, | |
509 | pastend, | |
510 | ifconnected); | |
511 | if (!curr) { | |
aea6cb94 DS |
512 | if (PIM_DEBUG_PIM_HELLO) { |
513 | zlog_debug("%s: could not set PIM hello Secondary Address List option for interface %s", | |
514 | __PRETTY_FUNCTION__, ifname); | |
515 | } | |
12e41d03 DL |
516 | return -4; |
517 | } | |
518 | } | |
519 | ||
520 | return curr - tlv_buf; | |
521 | } | |
522 | ||
523 | /* | |
524 | RFC 4601: 4.3.1. Sending Hello Messages | |
525 | ||
526 | Thus, if a router needs to send a Join/Prune or Assert message on an | |
527 | interface on which it has not yet sent a Hello message with the | |
528 | currently configured IP address, then it MUST immediately send the | |
529 | relevant Hello message without waiting for the Hello Timer to | |
530 | expire, followed by the Join/Prune or Assert message. | |
531 | */ | |
532 | void pim_hello_require(struct interface *ifp) | |
533 | { | |
534 | struct pim_interface *pim_ifp; | |
535 | ||
536 | zassert(ifp); | |
537 | ||
538 | pim_ifp = ifp->info; | |
539 | ||
540 | zassert(pim_ifp); | |
541 | ||
542 | if (pim_ifp->pim_ifstat_hello_sent) | |
543 | return; | |
544 | ||
545 | pim_hello_restart_now(ifp); /* Send hello and restart timer */ | |
546 | } |