1 /*-
2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * a) Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 *
10 * b) Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the distribution.
13 *
14 * c) Neither the name of Cisco Systems, Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28 * THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 /* $KAME: sctp_asconf.c,v 1.24 2005/03/06 16:04:16 itojun Exp $ */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: releng/8.1/sys/netinet/sctp_asconf.c 209433 2010-06-22 17:45:21Z tuexen $");
35 #include <netinet/sctp_os.h>
36 #include <netinet/sctp_var.h>
37 #include <netinet/sctp_sysctl.h>
38 #include <netinet/sctp_pcb.h>
39 #include <netinet/sctp_header.h>
40 #include <netinet/sctputil.h>
41 #include <netinet/sctp_output.h>
42 #include <netinet/sctp_asconf.h>
43 #include <netinet/sctp_timer.h>
44
45 /*
46 * debug flags:
47 * SCTP_DEBUG_ASCONF1: protocol info, general info and errors
48 * SCTP_DEBUG_ASCONF2: detailed info
49 */
50 #ifdef SCTP_DEBUG
51 #endif /* SCTP_DEBUG */
52
53
54 static void
55 sctp_asconf_get_source_ip(struct mbuf *m, struct sockaddr *sa)
56 {
57 struct ip *iph;
58 struct sockaddr_in *sin;
59
60 #ifdef INET6
61 struct sockaddr_in6 *sin6;
62
63 #endif
64
65 iph = mtod(m, struct ip *);
66 if (iph->ip_v == IPVERSION) {
67 /* IPv4 source */
68 sin = (struct sockaddr_in *)sa;
69 bzero(sin, sizeof(*sin));
70 sin->sin_family = AF_INET;
71 sin->sin_len = sizeof(struct sockaddr_in);
72 sin->sin_port = 0;
73 sin->sin_addr.s_addr = iph->ip_src.s_addr;
74 return;
75 }
76 #ifdef INET6
77 else if (iph->ip_v == (IPV6_VERSION >> 4)) {
78 /* IPv6 source */
79 struct ip6_hdr *ip6;
80
81 sin6 = (struct sockaddr_in6 *)sa;
82 bzero(sin6, sizeof(*sin6));
83 sin6->sin6_family = AF_INET6;
84 sin6->sin6_len = sizeof(struct sockaddr_in6);
85 sin6->sin6_port = 0;
86 ip6 = mtod(m, struct ip6_hdr *);
87 sin6->sin6_addr = ip6->ip6_src;
88 return;
89 }
90 #endif /* INET6 */
91 else
92 return;
93 }
94
95 /*
96 * draft-ietf-tsvwg-addip-sctp
97 *
98 * An ASCONF parameter queue exists per asoc which holds the pending address
99 * operations. Lists are updated upon receipt of ASCONF-ACK.
100 *
101 * A restricted_addrs list exists per assoc to hold local addresses that are
102 * not (yet) usable by the assoc as a source address. These addresses are
103 * either pending an ASCONF operation (and exist on the ASCONF parameter
104 * queue), or they are permanently restricted (the peer has returned an
105 * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF).
106 *
107 * Deleted addresses are always immediately removed from the lists as they will
108 * (shortly) no longer exist in the kernel. We send ASCONFs as a courtesy,
109 * only if allowed.
110 */
111
112 /*
113 * ASCONF parameter processing.
114 * response_required: set if a reply is required (eg. SUCCESS_REPORT).
115 * returns a mbuf to an "error" response parameter or NULL/"success" if ok.
116 * FIX: allocating this many mbufs on the fly is pretty inefficient...
117 */
118 static struct mbuf *
119 sctp_asconf_success_response(uint32_t id)
120 {
121 struct mbuf *m_reply = NULL;
122 struct sctp_asconf_paramhdr *aph;
123
124 m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr),
125 0, M_DONTWAIT, 1, MT_DATA);
126 if (m_reply == NULL) {
127 SCTPDBG(SCTP_DEBUG_ASCONF1,
128 "asconf_success_response: couldn't get mbuf!\n");
129 return NULL;
130 }
131 aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
132 aph->correlation_id = id;
133 aph->ph.param_type = htons(SCTP_SUCCESS_REPORT);
134 aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr);
135 SCTP_BUF_LEN(m_reply) = aph->ph.param_length;
136 aph->ph.param_length = htons(aph->ph.param_length);
137
138 return m_reply;
139 }
140
141 static struct mbuf *
142 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t * error_tlv,
143 uint16_t tlv_length)
144 {
145 struct mbuf *m_reply = NULL;
146 struct sctp_asconf_paramhdr *aph;
147 struct sctp_error_cause *error;
148 uint8_t *tlv;
149
150 m_reply = sctp_get_mbuf_for_msg((sizeof(struct sctp_asconf_paramhdr) +
151 tlv_length +
152 sizeof(struct sctp_error_cause)),
153 0, M_DONTWAIT, 1, MT_DATA);
154 if (m_reply == NULL) {
155 SCTPDBG(SCTP_DEBUG_ASCONF1,
156 "asconf_error_response: couldn't get mbuf!\n");
157 return NULL;
158 }
159 aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
160 error = (struct sctp_error_cause *)(aph + 1);
161
162 aph->correlation_id = id;
163 aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND);
164 error->code = htons(cause);
165 error->length = tlv_length + sizeof(struct sctp_error_cause);
166 aph->ph.param_length = error->length +
167 sizeof(struct sctp_asconf_paramhdr);
168
169 if (aph->ph.param_length > MLEN) {
170 SCTPDBG(SCTP_DEBUG_ASCONF1,
171 "asconf_error_response: tlv_length (%xh) too big\n",
172 tlv_length);
173 sctp_m_freem(m_reply); /* discard */
174 return NULL;
175 }
176 if (error_tlv != NULL) {
177 tlv = (uint8_t *) (error + 1);
178 memcpy(tlv, error_tlv, tlv_length);
179 }
180 SCTP_BUF_LEN(m_reply) = aph->ph.param_length;
181 error->length = htons(error->length);
182 aph->ph.param_length = htons(aph->ph.param_length);
183
184 return m_reply;
185 }
186
187 static struct mbuf *
188 sctp_process_asconf_add_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph,
189 struct sctp_tcb *stcb, int response_required)
190 {
191 struct mbuf *m_reply = NULL;
192 struct sockaddr_storage sa_source, sa_store;
193 struct sctp_ipv4addr_param *v4addr;
194 uint16_t param_type, param_length, aparam_length;
195 struct sockaddr *sa;
196 struct sockaddr_in *sin;
197 int zero_address = 0;
198
199 #ifdef INET6
200 struct sockaddr_in6 *sin6;
201 struct sctp_ipv6addr_param *v6addr;
202
203 #endif /* INET6 */
204
205 aparam_length = ntohs(aph->ph.param_length);
206 v4addr = (struct sctp_ipv4addr_param *)(aph + 1);
207 #ifdef INET6
208 v6addr = (struct sctp_ipv6addr_param *)(aph + 1);
209 #endif /* INET6 */
210 param_type = ntohs(v4addr->ph.param_type);
211 param_length = ntohs(v4addr->ph.param_length);
212
213 sa = (struct sockaddr *)&sa_store;
214 switch (param_type) {
215 case SCTP_IPV4_ADDRESS:
216 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
217 /* invalid param size */
218 return NULL;
219 }
220 sin = (struct sockaddr_in *)&sa_store;
221 bzero(sin, sizeof(*sin));
222 sin->sin_family = AF_INET;
223 sin->sin_len = sizeof(struct sockaddr_in);
224 sin->sin_port = stcb->rport;
225 sin->sin_addr.s_addr = v4addr->addr;
226 if (sin->sin_addr.s_addr == INADDR_ANY)
227 zero_address = 1;
228 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
229 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
230 break;
231 case SCTP_IPV6_ADDRESS:
232 #ifdef INET6
233 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
234 /* invalid param size */
235 return NULL;
236 }
237 sin6 = (struct sockaddr_in6 *)&sa_store;
238 bzero(sin6, sizeof(*sin6));
239 sin6->sin6_family = AF_INET6;
240 sin6->sin6_len = sizeof(struct sockaddr_in6);
241 sin6->sin6_port = stcb->rport;
242 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
243 sizeof(struct in6_addr));
244 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
245 zero_address = 1;
246 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding ");
247 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
248 #else
249 /* IPv6 not enabled! */
250 /* FIX ME: currently sends back an invalid param error */
251 m_reply = sctp_asconf_error_response(aph->correlation_id,
252 SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph, aparam_length);
253 SCTPDBG(SCTP_DEBUG_ASCONF1,
254 "process_asconf_add_ip: v6 disabled- skipping ");
255 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
256 return m_reply;
257 #endif
258 break;
259 default:
260 m_reply = sctp_asconf_error_response(aph->correlation_id,
261 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
262 aparam_length);
263 return m_reply;
264 } /* end switch */
265
266 /* if 0.0.0.0/::0, add the source address instead */
267 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
268 sa = (struct sockaddr *)&sa_source;
269 sctp_asconf_get_source_ip(m, sa);
270 SCTPDBG(SCTP_DEBUG_ASCONF1,
271 "process_asconf_add_ip: using source addr ");
272 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
273 }
274 /* add the address */
275 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE,
276 SCTP_ADDR_DYNAMIC_ADDED) != 0) {
277 SCTPDBG(SCTP_DEBUG_ASCONF1,
278 "process_asconf_add_ip: error adding address\n");
279 m_reply = sctp_asconf_error_response(aph->correlation_id,
280 SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *) aph,
281 aparam_length);
282 } else {
283 /* notify upper layer */
284 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
285 if (response_required) {
286 m_reply =
287 sctp_asconf_success_response(aph->correlation_id);
288 }
289 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb,
290 NULL, SCTP_FROM_SCTP_ASCONF + SCTP_LOC_1);
291 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
292 stcb, NULL);
293 }
294
295 return m_reply;
296 }
297
298 static int
299 sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src)
300 {
301 struct sctp_nets *src_net, *net;
302
303 /* make sure the source address exists as a destination net */
304 src_net = sctp_findnet(stcb, src);
305 if (src_net == NULL) {
306 /* not found */
307 return -1;
308 }
309 /* delete all destination addresses except the source */
310 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
311 if (net != src_net) {
312 /* delete this address */
313 sctp_remove_net(stcb, net);
314 SCTPDBG(SCTP_DEBUG_ASCONF1,
315 "asconf_del_remote_addrs_except: deleting ");
316 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1,
317 (struct sockaddr *)&net->ro._l_addr);
318 /* notify upper layer */
319 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0,
320 (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED);
321 }
322 }
323 return 0;
324 }
325
326 static struct mbuf *
327 sctp_process_asconf_delete_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph,
328 struct sctp_tcb *stcb, int response_required)
329 {
330 struct mbuf *m_reply = NULL;
331 struct sockaddr_storage sa_source, sa_store;
332 struct sctp_ipv4addr_param *v4addr;
333 uint16_t param_type, param_length, aparam_length;
334 struct sockaddr *sa;
335 struct sockaddr_in *sin;
336 int zero_address = 0;
337 int result;
338
339 #ifdef INET6
340 struct sockaddr_in6 *sin6;
341 struct sctp_ipv6addr_param *v6addr;
342
343 #endif /* INET6 */
344
345 /* get the source IP address for src and 0.0.0.0/::0 delete checks */
346 sctp_asconf_get_source_ip(m, (struct sockaddr *)&sa_source);
347
348 aparam_length = ntohs(aph->ph.param_length);
349 v4addr = (struct sctp_ipv4addr_param *)(aph + 1);
350 #ifdef INET6
351 v6addr = (struct sctp_ipv6addr_param *)(aph + 1);
352 #endif /* INET6 */
353 param_type = ntohs(v4addr->ph.param_type);
354 param_length = ntohs(v4addr->ph.param_length);
355
356 sa = (struct sockaddr *)&sa_store;
357 switch (param_type) {
358 case SCTP_IPV4_ADDRESS:
359 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
360 /* invalid param size */
361 return NULL;
362 }
363 sin = (struct sockaddr_in *)&sa_store;
364 bzero(sin, sizeof(*sin));
365 sin->sin_family = AF_INET;
366 sin->sin_len = sizeof(struct sockaddr_in);
367 sin->sin_port = stcb->rport;
368 sin->sin_addr.s_addr = v4addr->addr;
369 if (sin->sin_addr.s_addr == INADDR_ANY)
370 zero_address = 1;
371 SCTPDBG(SCTP_DEBUG_ASCONF1,
372 "process_asconf_delete_ip: deleting ");
373 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
374 break;
375 case SCTP_IPV6_ADDRESS:
376 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
377 /* invalid param size */
378 return NULL;
379 }
380 #ifdef INET6
381 sin6 = (struct sockaddr_in6 *)&sa_store;
382 bzero(sin6, sizeof(*sin6));
383 sin6->sin6_family = AF_INET6;
384 sin6->sin6_len = sizeof(struct sockaddr_in6);
385 sin6->sin6_port = stcb->rport;
386 memcpy(&sin6->sin6_addr, v6addr->addr,
387 sizeof(struct in6_addr));
388 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
389 zero_address = 1;
390 SCTPDBG(SCTP_DEBUG_ASCONF1,
391 "process_asconf_delete_ip: deleting ");
392 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
393 #else
394 /* IPv6 not enabled! No "action" needed; just ack it */
395 SCTPDBG(SCTP_DEBUG_ASCONF1,
396 "process_asconf_delete_ip: v6 disabled- ignoring: ");
397 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
398 /* just respond with a "success" ASCONF-ACK */
399 return NULL;
400 #endif
401 break;
402 default:
403 m_reply = sctp_asconf_error_response(aph->correlation_id,
404 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
405 aparam_length);
406 return m_reply;
407 }
408
409 /* make sure the source address is not being deleted */
410 if (sctp_cmpaddr(sa, (struct sockaddr *)&sa_source)) {
411 /* trying to delete the source address! */
412 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n");
413 m_reply = sctp_asconf_error_response(aph->correlation_id,
414 SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *) aph,
415 aparam_length);
416 return m_reply;
417 }
418 /* if deleting 0.0.0.0/::0, delete all addresses except src addr */
419 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
420 result = sctp_asconf_del_remote_addrs_except(stcb,
421 (struct sockaddr *)&sa_source);
422
423 if (result) {
424 /* src address did not exist? */
425 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n");
426 /* what error to reply with?? */
427 m_reply =
428 sctp_asconf_error_response(aph->correlation_id,
429 SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *) aph,
430 aparam_length);
431 } else if (response_required) {
432 m_reply =
433 sctp_asconf_success_response(aph->correlation_id);
434 }
435 return m_reply;
436 }
437 /* delete the address */
438 result = sctp_del_remote_addr(stcb, sa);
439 /*
440 * note if result == -2, the address doesn't exist in the asoc but
441 * since it's being deleted anyways, we just ack the delete -- but
442 * this probably means something has already gone awry
443 */
444 if (result == -1) {
445 /* only one address in the asoc */
446 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n");
447 m_reply = sctp_asconf_error_response(aph->correlation_id,
448 SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *) aph,
449 aparam_length);
450 } else {
451 if (response_required) {
452 m_reply = sctp_asconf_success_response(aph->correlation_id);
453 }
454 /* notify upper layer */
455 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
456 }
457 return m_reply;
458 }
459
460 static struct mbuf *
461 sctp_process_asconf_set_primary(struct mbuf *m,
462 struct sctp_asconf_paramhdr *aph,
463 struct sctp_tcb *stcb, int response_required)
464 {
465 struct mbuf *m_reply = NULL;
466 struct sockaddr_storage sa_source, sa_store;
467 struct sctp_ipv4addr_param *v4addr;
468 uint16_t param_type, param_length, aparam_length;
469 struct sockaddr *sa;
470 struct sockaddr_in *sin;
471 int zero_address = 0;
472
473 #ifdef INET6
474 struct sockaddr_in6 *sin6;
475 struct sctp_ipv6addr_param *v6addr;
476
477 #endif /* INET6 */
478
479 aparam_length = ntohs(aph->ph.param_length);
480 v4addr = (struct sctp_ipv4addr_param *)(aph + 1);
481 #ifdef INET6
482 v6addr = (struct sctp_ipv6addr_param *)(aph + 1);
483 #endif /* INET6 */
484 param_type = ntohs(v4addr->ph.param_type);
485 param_length = ntohs(v4addr->ph.param_length);
486
487 sa = (struct sockaddr *)&sa_store;
488 switch (param_type) {
489 case SCTP_IPV4_ADDRESS:
490 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
491 /* invalid param size */
492 return NULL;
493 }
494 sin = (struct sockaddr_in *)&sa_store;
495 bzero(sin, sizeof(*sin));
496 sin->sin_family = AF_INET;
497 sin->sin_len = sizeof(struct sockaddr_in);
498 sin->sin_addr.s_addr = v4addr->addr;
499 if (sin->sin_addr.s_addr == INADDR_ANY)
500 zero_address = 1;
501 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
502 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
503 break;
504 case SCTP_IPV6_ADDRESS:
505 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
506 /* invalid param size */
507 return NULL;
508 }
509 #ifdef INET6
510 sin6 = (struct sockaddr_in6 *)&sa_store;
511 bzero(sin6, sizeof(*sin6));
512 sin6->sin6_family = AF_INET6;
513 sin6->sin6_len = sizeof(struct sockaddr_in6);
514 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
515 sizeof(struct in6_addr));
516 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
517 zero_address = 1;
518 SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: ");
519 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
520 #else
521 /* IPv6 not enabled! No "action" needed; just ack it */
522 SCTPDBG(SCTP_DEBUG_ASCONF1,
523 "process_asconf_set_primary: v6 disabled- ignoring: ");
524 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
525 /* just respond with a "success" ASCONF-ACK */
526 return NULL;
527 #endif
528 break;
529 default:
530 m_reply = sctp_asconf_error_response(aph->correlation_id,
531 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
532 aparam_length);
533 return m_reply;
534 }
535
536 /* if 0.0.0.0/::0, use the source address instead */
537 if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) {
538 sa = (struct sockaddr *)&sa_source;
539 sctp_asconf_get_source_ip(m, sa);
540 SCTPDBG(SCTP_DEBUG_ASCONF1,
541 "process_asconf_set_primary: using source addr ");
542 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
543 }
544 /* set the primary address */
545 if (sctp_set_primary_addr(stcb, sa, NULL) == 0) {
546 SCTPDBG(SCTP_DEBUG_ASCONF1,
547 "process_asconf_set_primary: primary address set\n");
548 /* notify upper layer */
549 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED);
550
551 if (response_required) {
552 m_reply = sctp_asconf_success_response(aph->correlation_id);
553 }
554 /*
555 * Mobility adaptation. Ideally, when the reception of SET
556 * PRIMARY with DELETE IP ADDRESS of the previous primary
557 * destination, unacknowledged DATA are retransmitted
558 * immediately to the new primary destination for seamless
559 * handover. If the destination is UNCONFIRMED and marked to
560 * REQ_PRIM, The retransmission occur when reception of the
561 * HEARTBEAT-ACK. (See sctp_handle_heartbeat_ack in
562 * sctp_input.c) Also, when change of the primary
563 * destination, it is better that all subsequent new DATA
564 * containing already queued DATA are transmitted to the new
565 * primary destination. (by micchie)
566 */
567 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
568 SCTP_MOBILITY_BASE) ||
569 sctp_is_mobility_feature_on(stcb->sctp_ep,
570 SCTP_MOBILITY_FASTHANDOFF)) &&
571 sctp_is_mobility_feature_on(stcb->sctp_ep,
572 SCTP_MOBILITY_PRIM_DELETED) &&
573 (stcb->asoc.primary_destination->dest_state &
574 SCTP_ADDR_UNCONFIRMED) == 0) {
575
576 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_TIMER + SCTP_LOC_7);
577 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
578 SCTP_MOBILITY_FASTHANDOFF)) {
579 sctp_assoc_immediate_retrans(stcb,
580 stcb->asoc.primary_destination);
581 }
582 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
583 SCTP_MOBILITY_BASE)) {
584 sctp_move_chunks_from_deleted_prim(stcb,
585 stcb->asoc.primary_destination);
586 }
587 sctp_delete_prim_timer(stcb->sctp_ep, stcb,
588 stcb->asoc.deleted_primary);
589 }
590 } else {
591 /* couldn't set the requested primary address! */
592 SCTPDBG(SCTP_DEBUG_ASCONF1,
593 "process_asconf_set_primary: set primary failed!\n");
594 /* must have been an invalid address, so report */
595 m_reply = sctp_asconf_error_response(aph->correlation_id,
596 SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph,
597 aparam_length);
598 }
599
600 return m_reply;
601 }
602
603 /*
604 * handles an ASCONF chunk.
605 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK
606 */
607 void
608 sctp_handle_asconf(struct mbuf *m, unsigned int offset,
609 struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb,
610 int first)
611 {
612 struct sctp_association *asoc;
613 uint32_t serial_num;
614 struct mbuf *n, *m_ack, *m_result, *m_tail;
615 struct sctp_asconf_ack_chunk *ack_cp;
616 struct sctp_asconf_paramhdr *aph, *ack_aph;
617 struct sctp_ipv6addr_param *p_addr;
618 unsigned int asconf_limit;
619 int error = 0; /* did an error occur? */
620
621 /* asconf param buffer */
622 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
623 struct sctp_asconf_ack *ack, *ack_next;
624
625 /* verify minimum length */
626 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) {
627 SCTPDBG(SCTP_DEBUG_ASCONF1,
628 "handle_asconf: chunk too small = %xh\n",
629 ntohs(cp->ch.chunk_length));
630 return;
631 }
632 asoc = &stcb->asoc;
633 serial_num = ntohl(cp->serial_number);
634
635 if (compare_with_wrap(asoc->asconf_seq_in, serial_num, MAX_SEQ) ||
636 serial_num == asoc->asconf_seq_in) {
637 /* got a duplicate ASCONF */
638 SCTPDBG(SCTP_DEBUG_ASCONF1,
639 "handle_asconf: got duplicate serial number = %xh\n",
640 serial_num);
641 return;
642 } else if (serial_num != (asoc->asconf_seq_in + 1)) {
643 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n",
644 serial_num, asoc->asconf_seq_in + 1);
645 return;
646 }
647 /* it's the expected "next" sequence number, so process it */
648 asoc->asconf_seq_in = serial_num; /* update sequence */
649 /* get length of all the param's in the ASCONF */
650 asconf_limit = offset + ntohs(cp->ch.chunk_length);
651 SCTPDBG(SCTP_DEBUG_ASCONF1,
652 "handle_asconf: asconf_limit=%u, sequence=%xh\n",
653 asconf_limit, serial_num);
654
655 if (first) {
656 /* delete old cache */
657 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing firstASCONF. Try to delte old cache\n");
658
659 ack = TAILQ_FIRST(&stcb->asoc.asconf_ack_sent);
660 while (ack != NULL) {
661 ack_next = TAILQ_NEXT(ack, next);
662 if (ack->serial_number == serial_num)
663 break;
664 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n",
665 ack->serial_number, serial_num);
666 TAILQ_REMOVE(&stcb->asoc.asconf_ack_sent, ack, next);
667 if (ack->data != NULL) {
668 sctp_m_freem(ack->data);
669 }
670 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack);
671 ack = ack_next;
672 }
673 }
674 m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0,
675 M_DONTWAIT, 1, MT_DATA);
676 if (m_ack == NULL) {
677 SCTPDBG(SCTP_DEBUG_ASCONF1,
678 "handle_asconf: couldn't get mbuf!\n");
679 return;
680 }
681 m_tail = m_ack; /* current reply chain's tail */
682
683 /* fill in ASCONF-ACK header */
684 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *);
685 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK;
686 ack_cp->ch.chunk_flags = 0;
687 ack_cp->serial_number = htonl(serial_num);
688 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */
689 SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk);
690 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk);
691
692 /* skip the lookup address parameter */
693 offset += sizeof(struct sctp_asconf_chunk);
694 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *) & aparam_buf);
695 if (p_addr == NULL) {
696 SCTPDBG(SCTP_DEBUG_ASCONF1,
697 "handle_asconf: couldn't get lookup addr!\n");
698 /* respond with a missing/invalid mandatory parameter error */
699 return;
700 }
701 /* param_length is already validated in process_control... */
702 offset += ntohs(p_addr->ph.param_length); /* skip lookup addr */
703
704 /* get pointer to first asconf param in ASCONF-ACK */
705 ack_aph = (struct sctp_asconf_paramhdr *)(mtod(m_ack, caddr_t)+sizeof(struct sctp_asconf_ack_chunk));
706 if (ack_aph == NULL) {
707 SCTPDBG(SCTP_DEBUG_ASCONF1, "Gak in asconf2\n");
708 return;
709 }
710 /* get pointer to first asconf param in ASCONF */
711 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *) & aparam_buf);
712 if (aph == NULL) {
713 SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n");
714 goto send_reply;
715 }
716 /* process through all parameters */
717 while (aph != NULL) {
718 unsigned int param_length, param_type;
719
720 param_type = ntohs(aph->ph.param_type);
721 param_length = ntohs(aph->ph.param_length);
722 if (offset + param_length > asconf_limit) {
723 /* parameter goes beyond end of chunk! */
724 sctp_m_freem(m_ack);
725 return;
726 }
727 m_result = NULL;
728
729 if (param_length > sizeof(aparam_buf)) {
730 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length);
731 sctp_m_freem(m_ack);
732 return;
733 }
734 if (param_length <= sizeof(struct sctp_paramhdr)) {
735 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length);
736 sctp_m_freem(m_ack);
737 }
738 /* get the entire parameter */
739 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
740 if (aph == NULL) {
741 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n");
742 sctp_m_freem(m_ack);
743 return;
744 }
745 switch (param_type) {
746 case SCTP_ADD_IP_ADDRESS:
747 asoc->peer_supports_asconf = 1;
748 m_result = sctp_process_asconf_add_ip(m, aph, stcb,
749 error);
750 break;
751 case SCTP_DEL_IP_ADDRESS:
752 asoc->peer_supports_asconf = 1;
753 m_result = sctp_process_asconf_delete_ip(m, aph, stcb,
754 error);
755 break;
756 case SCTP_ERROR_CAUSE_IND:
757 /* not valid in an ASCONF chunk */
758 break;
759 case SCTP_SET_PRIM_ADDR:
760 asoc->peer_supports_asconf = 1;
761 m_result = sctp_process_asconf_set_primary(m, aph,
762 stcb, error);
763 break;
764 case SCTP_NAT_VTAGS:
765 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n");
766 break;
767 case SCTP_SUCCESS_REPORT:
768 /* not valid in an ASCONF chunk */
769 break;
770 case SCTP_ULP_ADAPTATION:
771 /* FIX */
772 break;
773 default:
774 if ((param_type & 0x8000) == 0) {
775 /* Been told to STOP at this param */
776 asconf_limit = offset;
777 /*
778 * FIX FIX - We need to call
779 * sctp_arethere_unrecognized_parameters()
780 * to get a operr and send it for any
781 * param's with the 0x4000 bit set OR do it
782 * here ourselves... note we still must STOP
783 * if the 0x8000 bit is clear.
784 */
785 }
786 /* unknown/invalid param type */
787 break;
788 } /* switch */
789
790 /* add any (error) result to the reply mbuf chain */
791 if (m_result != NULL) {
792 SCTP_BUF_NEXT(m_tail) = m_result;
793 m_tail = m_result;
794 /* update lengths, make sure it's aligned too */
795 SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result));
796 ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result);
797 /* set flag to force success reports */
798 error = 1;
799 }
800 offset += SCTP_SIZE32(param_length);
801 /* update remaining ASCONF message length to process */
802 if (offset >= asconf_limit) {
803 /* no more data in the mbuf chain */
804 break;
805 }
806 /* get pointer to next asconf param */
807 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
808 sizeof(struct sctp_asconf_paramhdr),
809 (uint8_t *) & aparam_buf);
810 if (aph == NULL) {
811 /* can't get an asconf paramhdr */
812 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n");
813 /* FIX ME - add error here... */
814 }
815 }
816
817 send_reply:
818 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length);
819 /* save the ASCONF-ACK reply */
820 ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack),
821 struct sctp_asconf_ack);
822 if (ack == NULL) {
823 sctp_m_freem(m_ack);
824 return;
825 }
826 ack->serial_number = serial_num;
827 ack->last_sent_to = NULL;
828 ack->data = m_ack;
829 ack->len = 0;
830 n = m_ack;
831 while (n) {
832 ack->len += SCTP_BUF_LEN(n);
833 n = SCTP_BUF_NEXT(n);
834 }
835 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next);
836
837 /* see if last_control_chunk_from is set properly (use IP src addr) */
838 if (stcb->asoc.last_control_chunk_from == NULL) {
839 /*
840 * this could happen if the source address was just newly
841 * added
842 */
843 struct ip *iph;
844 struct sctphdr *sh;
845 struct sockaddr_storage from_store;
846 struct sockaddr *from = (struct sockaddr *)&from_store;
847
848 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n");
849 /* pullup already done, IP options already stripped */
850 iph = mtod(m, struct ip *);
851 sh = (struct sctphdr *)((caddr_t)iph + sizeof(*iph));
852 switch (iph->ip_v) {
853 case IPVERSION:
854 {
855 struct sockaddr_in *from4;
856
857 from4 = (struct sockaddr_in *)&from_store;
858 bzero(from4, sizeof(*from4));
859 from4->sin_family = AF_INET;
860 from4->sin_len = sizeof(struct sockaddr_in);
861 from4->sin_addr.s_addr = iph->ip_src.s_addr;
862 from4->sin_port = sh->src_port;
863 break;
864 }
865 #ifdef INET6
866 case IPV6_VERSION >> 4:
867 {
868 struct ip6_hdr *ip6;
869 struct sockaddr_in6 *from6;
870
871 ip6 = mtod(m, struct ip6_hdr *);
872 from6 = (struct sockaddr_in6 *)&from_store;
873 bzero(from6, sizeof(*from6));
874 from6->sin6_family = AF_INET6;
875 from6->sin6_len = sizeof(struct sockaddr_in6);
876 from6->sin6_addr = ip6->ip6_src;
877 from6->sin6_port = sh->src_port;
878 /*
879 * Get the scopes in properly to the sin6
880 * addr's
881 */
882 /* we probably don't need these operations */
883 (void)sa6_recoverscope(from6);
884 sa6_embedscope(from6,
885 MODULE_GLOBAL(ip6_use_defzone));
886
887 break;
888 }
889 #endif
890 default:
891 /* unknown address type */
892 from = NULL;
893 }
894 if (from != NULL) {
895 SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: ");
896 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, from);
897 /* look up the from address */
898 stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, from);
899 #ifdef SCTP_DEBUG
900 if (stcb->asoc.last_control_chunk_from == NULL)
901 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n");
902 #endif
903 }
904 }
905 }
906
907 /*
908 * does the address match? returns 0 if not, 1 if so
909 */
910 static uint32_t
911 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa)
912 {
913 #ifdef INET6
914 if (sa->sa_family == AF_INET6) {
915 /* IPv6 sa address */
916 /* XXX scopeid */
917 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
918
919 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) &&
920 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr,
921 sizeof(struct in6_addr)) == 0)) {
922 return (1);
923 }
924 } else
925 #endif /* INET6 */
926 if (sa->sa_family == AF_INET) {
927 /* IPv4 sa address */
928 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
929
930 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) &&
931 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr,
932 sizeof(struct in_addr)) == 0)) {
933 return (1);
934 }
935 }
936 return (0);
937 }
938
939 /*
940 * does the address match? returns 0 if not, 1 if so
941 */
942 static uint32_t
943 sctp_addr_match(
944 struct sctp_ipv6addr_param *v6addr,
945 struct sockaddr *sa)
946 {
947 uint16_t param_type, param_length;
948 struct sctp_ipv4addr_param *v4addr = (struct sctp_ipv4addr_param *)v6addr;
949
950 #ifdef INET6
951 if (sa->sa_family == AF_INET6) {
952 /* IPv6 sa address */
953 /* XXX scopeid */
954 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
955
956 param_type = ntohs(v6addr->ph.param_type);
957 param_length = ntohs(v6addr->ph.param_length);
958
959 if ((param_type == SCTP_IPV6_ADDRESS) &&
960 param_length == sizeof(struct sctp_ipv6addr_param) &&
961 (memcmp(&v6addr->addr, &sin6->sin6_addr,
962 sizeof(struct in6_addr)) == 0)) {
963 return (1);
964 }
965 }
966 #endif
967 if (sa->sa_family == AF_INET) {
968 /* IPv4 sa address */
969 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
970
971 param_type = ntohs(v4addr->ph.param_type);
972 param_length = ntohs(v4addr->ph.param_length);
973
974 if ((param_type == SCTP_IPV4_ADDRESS) &&
975 param_length == sizeof(struct sctp_ipv4addr_param) &&
976 (memcmp(&v4addr->addr, &sin->sin_addr,
977 sizeof(struct in_addr)) == 0)) {
978 return (1);
979 }
980 }
981 return (0);
982 }
983
984 /*
985 * Cleanup for non-responded/OP ERR'd ASCONF
986 */
987 void
988 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net)
989 {
990 /* mark peer as ASCONF incapable */
991 stcb->asoc.peer_supports_asconf = 0;
992 /*
993 * clear out any existing asconfs going out
994 */
995 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net,
996 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2);
997 stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out;
998 /* remove the old ASCONF on our outbound queue */
999 sctp_toss_old_asconf(stcb);
1000 }
1001
1002 /*
1003 * cleanup any cached source addresses that may be topologically
1004 * incorrect after a new address has been added to this interface.
1005 */
1006 static void
1007 sctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn)
1008 {
1009 struct sctp_nets *net;
1010
1011 /*
1012 * Ideally, we want to only clear cached routes and source addresses
1013 * that are topologically incorrect. But since there is no easy way
1014 * to know whether the newly added address on the ifn would cause a
1015 * routing change (i.e. a new egress interface would be chosen)
1016 * without doing a new routing lookup and source address selection,
1017 * we will (for now) just flush any cached route using a different
1018 * ifn (and cached source addrs) and let output re-choose them
1019 * during the next send on that net.
1020 */
1021 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1022 /*
1023 * clear any cached route (and cached source address) if the
1024 * route's interface is NOT the same as the address change.
1025 * If it's the same interface, just clear the cached source
1026 * address.
1027 */
1028 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) &&
1029 ((ifn == NULL) ||
1030 (SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index))) {
1031 /* clear any cached route */
1032 RTFREE(net->ro.ro_rt);
1033 net->ro.ro_rt = NULL;
1034 }
1035 /* clear any cached source address */
1036 if (net->src_addr_selected) {
1037 sctp_free_ifa(net->ro._s_addr);
1038 net->ro._s_addr = NULL;
1039 net->src_addr_selected = 0;
1040 }
1041 }
1042 }
1043
1044 void
1045 sctp_move_chunks_from_deleted_prim(struct sctp_tcb *stcb, struct sctp_nets *dst)
1046 {
1047 struct sctp_association *asoc;
1048 struct sctp_stream_out *outs;
1049 struct sctp_tmit_chunk *chk;
1050 struct sctp_stream_queue_pending *sp;
1051
1052 if (dst->dest_state & SCTP_ADDR_UNCONFIRMED) {
1053 return;
1054 }
1055 if (stcb->asoc.deleted_primary == NULL) {
1056 return;
1057 }
1058 asoc = &stcb->asoc;
1059
1060 /*
1061 * now through all the streams checking for chunks sent to our bad
1062 * network.
1063 */
1064 TAILQ_FOREACH(outs, &asoc->out_wheel, next_spoke) {
1065 /* now clean up any chunks here */
1066 TAILQ_FOREACH(sp, &outs->outqueue, next) {
1067 if (sp->net == asoc->deleted_primary) {
1068 sctp_free_remote_addr(sp->net);
1069 sp->net = dst;
1070 atomic_add_int(&dst->ref_count, 1);
1071 }
1072 }
1073 }
1074 /* Now check the pending queue */
1075 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
1076 if (chk->whoTo == asoc->deleted_primary) {
1077 sctp_free_remote_addr(chk->whoTo);
1078 chk->whoTo = dst;
1079 atomic_add_int(&dst->ref_count, 1);
1080 }
1081 }
1082
1083 }
1084
1085
1086 void
1087 sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet)
1088 {
1089 int error;
1090
1091 if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) {
1092 return;
1093 }
1094 if (stcb->asoc.deleted_primary == NULL) {
1095 return;
1096 }
1097 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
1098 SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is ");
1099 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa);
1100 SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is ");
1101 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa);
1102 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb,
1103 stcb->asoc.deleted_primary,
1104 SCTP_FROM_SCTP_TIMER + SCTP_LOC_8);
1105 stcb->asoc.num_send_timers_up--;
1106 if (stcb->asoc.num_send_timers_up < 0) {
1107 stcb->asoc.num_send_timers_up = 0;
1108 }
1109 SCTP_TCB_LOCK_ASSERT(stcb);
1110 error = sctp_t3rxt_timer(stcb->sctp_ep, stcb,
1111 stcb->asoc.deleted_primary);
1112 if (error) {
1113 SCTP_INP_DECR_REF(stcb->sctp_ep);
1114 return;
1115 }
1116 SCTP_TCB_LOCK_ASSERT(stcb);
1117 #ifdef SCTP_AUDITING_ENABLED
1118 sctp_auditing(4, stcb->sctp_ep, stcb, stcb->asoc.deleted_primary);
1119 #endif
1120 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1121 if ((stcb->asoc.num_send_timers_up == 0) &&
1122 (stcb->asoc.sent_queue_cnt > 0)) {
1123 struct sctp_tmit_chunk *chk;
1124
1125 chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
1126 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
1127 stcb, chk->whoTo);
1128 }
1129 }
1130 return;
1131 }
1132
1133 static int
1134 sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t);
1135
1136 void
1137 sctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net)
1138 {
1139 struct sctp_tmit_chunk *chk;
1140
1141 SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO);
1142 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net,
1143 SCTP_FROM_SCTP_TIMER + SCTP_LOC_5);
1144 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
1145 net->error_count = 0;
1146 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1147 if (chk->whoTo == net) {
1148 if (chk->sent < SCTP_DATAGRAM_RESEND) {
1149 chk->sent = SCTP_DATAGRAM_RESEND;
1150 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1151 sctp_flight_size_decrease(chk);
1152 sctp_total_flight_decrease(stcb, chk);
1153 net->marked_retrans++;
1154 stcb->asoc.marked_retrans++;
1155 }
1156 }
1157 }
1158 if (net->marked_retrans) {
1159 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1160 }
1161 }
1162
1163 static void
1164 sctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa)
1165 {
1166 struct sctp_nets *net;
1167 int addrnum, changed;
1168
1169 /*
1170 * If number of local valid addresses is 1, the valid address is
1171 * probably newly added address. Several valid addresses in this
1172 * association. A source address may not be changed. Additionally,
1173 * they can be configured on a same interface as "alias" addresses.
1174 * (by micchie)
1175 */
1176 addrnum = sctp_local_addr_count(stcb);
1177 SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n",
1178 addrnum);
1179 if (addrnum == 1) {
1180 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1181 /* clear any cached route and source address */
1182 if (net->ro.ro_rt) {
1183 RTFREE(net->ro.ro_rt);
1184 net->ro.ro_rt = NULL;
1185 }
1186 if (net->src_addr_selected) {
1187 sctp_free_ifa(net->ro._s_addr);
1188 net->ro._s_addr = NULL;
1189 net->src_addr_selected = 0;
1190 }
1191 /* Retransmit unacknowledged DATA chunks immediately */
1192 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1193 SCTP_MOBILITY_FASTHANDOFF)) {
1194 sctp_net_immediate_retrans(stcb, net);
1195 }
1196 /* also, SET PRIMARY is maybe already sent */
1197 }
1198 return;
1199 }
1200 /* Multiple local addresses exsist in the association. */
1201 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1202 /* clear any cached route and source address */
1203 if (net->ro.ro_rt) {
1204 RTFREE(net->ro.ro_rt);
1205 net->ro.ro_rt = NULL;
1206 }
1207 if (net->src_addr_selected) {
1208 sctp_free_ifa(net->ro._s_addr);
1209 net->ro._s_addr = NULL;
1210 net->src_addr_selected = 0;
1211 }
1212 /*
1213 * Check if the nexthop is corresponding to the new address.
1214 * If the new address is corresponding to the current
1215 * nexthop, the path will be changed. If the new address is
1216 * NOT corresponding to the current nexthop, the path will
1217 * not be changed.
1218 */
1219 SCTP_RTALLOC((sctp_route_t *) & net->ro,
1220 stcb->sctp_ep->def_vrf_id);
1221 if (net->ro.ro_rt == NULL)
1222 continue;
1223
1224 changed = 0;
1225 if (net->ro._l_addr.sa.sa_family == AF_INET) {
1226 if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *) & net->ro))
1227 changed = 1;
1228 }
1229 #ifdef INET6
1230 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
1231 if (sctp_v6src_match_nexthop(
1232 &newifa->address.sin6, (sctp_route_t *) & net->ro))
1233 changed = 1;
1234 }
1235 #endif
1236 /*
1237 * if the newly added address does not relate routing
1238 * information, we skip.
1239 */
1240 if (changed == 0)
1241 continue;
1242 /* Retransmit unacknowledged DATA chunks immediately */
1243 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1244 SCTP_MOBILITY_FASTHANDOFF)) {
1245 sctp_net_immediate_retrans(stcb, net);
1246 }
1247 /* Send SET PRIMARY for this new address */
1248 if (net == stcb->asoc.primary_destination) {
1249 (void)sctp_asconf_queue_mgmt(stcb, newifa,
1250 SCTP_SET_PRIM_ADDR);
1251 }
1252 }
1253 }
1254
1255 /*
1256 * process an ADD/DELETE IP ack from peer.
1257 * addr: corresponding sctp_ifa to the address being added/deleted.
1258 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS.
1259 * flag: 1=success, 0=failure.
1260 */
1261 static void
1262 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr,
1263 uint16_t type, uint32_t flag)
1264 {
1265 /*
1266 * do the necessary asoc list work- if we get a failure indication,
1267 * leave the address on the assoc's restricted list. If we get a
1268 * success indication, remove the address from the restricted list.
1269 */
1270 /*
1271 * Note: this will only occur for ADD_IP_ADDRESS, since
1272 * DEL_IP_ADDRESS is never actually added to the list...
1273 */
1274 if (flag) {
1275 /* success case, so remove from the restricted list */
1276 sctp_del_local_addr_restricted(stcb, addr);
1277
1278 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
1279 SCTP_MOBILITY_BASE) ||
1280 sctp_is_mobility_feature_on(stcb->sctp_ep,
1281 SCTP_MOBILITY_FASTHANDOFF)) {
1282 sctp_path_check_and_react(stcb, addr);
1283 return;
1284 }
1285 /* clear any cached/topologically incorrect source addresses */
1286 sctp_asconf_nets_cleanup(stcb, addr->ifn_p);
1287 }
1288 /* else, leave it on the list */
1289 }
1290
1291 /*
1292 * add an asconf add/delete/set primary IP address parameter to the queue.
1293 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1294 * returns 0 if queued, -1 if not queued/removed.
1295 * NOTE: if adding, but a delete for the same address is already scheduled
1296 * (and not yet sent out), simply remove it from queue. Same for deleting
1297 * an address already scheduled for add. If a duplicate operation is found,
1298 * ignore the new one.
1299 */
1300 static int
1301 sctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1302 uint16_t type)
1303 {
1304 struct sctp_asconf_addr *aa, *aa_next;
1305 struct sockaddr *sa;
1306
1307 /* make sure the request isn't already in the queue */
1308 for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL;
1309 aa = aa_next) {
1310 aa_next = TAILQ_NEXT(aa, next);
1311 /* address match? */
1312 if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0)
1313 continue;
1314 /*
1315 * is the request already in queue but not sent? pass the
1316 * request already sent in order to resolve the following
1317 * case: 1. arrival of ADD, then sent 2. arrival of DEL. we
1318 * can't remove the ADD request already sent 3. arrival of
1319 * ADD
1320 */
1321 if (aa->ap.aph.ph.param_type == type && aa->sent == 0) {
1322 return (-1);
1323 }
1324 /* is the negative request already in queue, and not sent */
1325 if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) &&
1326 (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) {
1327 /* add requested, delete already queued */
1328 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1329 /* remove the ifa from the restricted list */
1330 sctp_del_local_addr_restricted(stcb, ifa);
1331 /* free the asconf param */
1332 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1333 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n");
1334 return (-1);
1335 }
1336 if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) &&
1337 (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) {
1338 /* delete requested, add already queued */
1339 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1340 /* remove the aa->ifa from the restricted list */
1341 sctp_del_local_addr_restricted(stcb, aa->ifa);
1342 /* free the asconf param */
1343 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1344 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n");
1345 return (-1);
1346 }
1347 } /* for each aa */
1348
1349 /* adding new request to the queue */
1350 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1351 SCTP_M_ASC_ADDR);
1352 if (aa == NULL) {
1353 /* didn't get memory */
1354 SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n");
1355 return (-1);
1356 }
1357 aa->special_del = 0;
1358 /* fill in asconf address parameter fields */
1359 /* top level elements are "networked" during send */
1360 aa->ap.aph.ph.param_type = type;
1361 aa->ifa = ifa;
1362 atomic_add_int(&ifa->refcount, 1);
1363 /* correlation_id filled in during send routine later... */
1364 if (ifa->address.sa.sa_family == AF_INET6) {
1365 /* IPv6 address */
1366 struct sockaddr_in6 *sin6;
1367
1368 sin6 = (struct sockaddr_in6 *)&ifa->address.sa;
1369 sa = (struct sockaddr *)sin6;
1370 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1371 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1372 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1373 sizeof(struct sctp_ipv6addr_param);
1374 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1375 sizeof(struct in6_addr));
1376 } else if (ifa->address.sa.sa_family == AF_INET) {
1377 /* IPv4 address */
1378 struct sockaddr_in *sin;
1379
1380 sin = (struct sockaddr_in *)&ifa->address.sa;
1381 sa = (struct sockaddr *)sin;
1382 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1383 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1384 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) +
1385 sizeof(struct sctp_ipv4addr_param);
1386 memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1387 sizeof(struct in_addr));
1388 } else {
1389 /* invalid family! */
1390 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1391 sctp_free_ifa(ifa);
1392 return (-1);
1393 }
1394 aa->sent = 0; /* clear sent flag */
1395
1396 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1397 #ifdef SCTP_DEBUG
1398 if (SCTP_BASE_SYSCTL(sctp_debug_on) && SCTP_DEBUG_ASCONF2) {
1399 if (type == SCTP_ADD_IP_ADDRESS) {
1400 SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: ");
1401 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
1402 } else if (type == SCTP_DEL_IP_ADDRESS) {
1403 SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: ");
1404 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
1405 } else {
1406 SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: ");
1407 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
1408 }
1409 }
1410 #endif
1411
1412 return (0);
1413 }
1414
1415
1416 /*
1417 * add an asconf operation for the given ifa and type.
1418 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR.
1419 * returns 0 if completed, -1 if not completed, 1 if immediate send is
1420 * advisable.
1421 */
1422 static int
1423 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa,
1424 uint16_t type)
1425 {
1426 uint32_t status;
1427 int pending_delete_queued = 0;
1428
1429 /* see if peer supports ASCONF */
1430 if (stcb->asoc.peer_supports_asconf == 0) {
1431 return (-1);
1432 }
1433 /*
1434 * if this is deleting the last address from the assoc, mark it as
1435 * pending.
1436 */
1437 if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending &&
1438 (sctp_local_addr_count(stcb) < 2)) {
1439 /* set the pending delete info only */
1440 stcb->asoc.asconf_del_pending = 1;
1441 stcb->asoc.asconf_addr_del_pending = ifa;
1442 atomic_add_int(&ifa->refcount, 1);
1443 SCTPDBG(SCTP_DEBUG_ASCONF2,
1444 "asconf_queue_add: mark delete last address pending\n");
1445 return (-1);
1446 }
1447 /* queue an asconf parameter */
1448 status = sctp_asconf_queue_mgmt(stcb, ifa, type);
1449
1450 /*
1451 * if this is an add, and there is a delete also pending (i.e. the
1452 * last local address is being changed), queue the pending delete
1453 * too.
1454 */
1455 if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) {
1456 /* queue in the pending delete */
1457 if (sctp_asconf_queue_mgmt(stcb,
1458 stcb->asoc.asconf_addr_del_pending,
1459 SCTP_DEL_IP_ADDRESS) == 0) {
1460 SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n");
1461 pending_delete_queued = 1;
1462 /* clear out the pending delete info */
1463 stcb->asoc.asconf_del_pending = 0;
1464 sctp_free_ifa(stcb->asoc.asconf_addr_del_pending);
1465 stcb->asoc.asconf_addr_del_pending = NULL;
1466 }
1467 }
1468 if (pending_delete_queued) {
1469 struct sctp_nets *net;
1470
1471 /*
1472 * since we know that the only/last address is now being
1473 * changed in this case, reset the cwnd/rto on all nets to
1474 * start as a new address and path. Also clear the error
1475 * counts to give the assoc the best chance to complete the
1476 * address change.
1477 */
1478 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1479 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb,
1480 net);
1481 net->RTO = 0;
1482 net->error_count = 0;
1483 }
1484 stcb->asoc.overall_error_count = 0;
1485 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1486 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1487 stcb->asoc.overall_error_count,
1488 0,
1489 SCTP_FROM_SCTP_ASCONF,
1490 __LINE__);
1491 }
1492 /* queue in an advisory set primary too */
1493 (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR);
1494 /* let caller know we should send this out immediately */
1495 status = 1;
1496 }
1497 return (status);
1498 }
1499
1500 /*-
1501 * add an asconf delete IP address parameter to the queue by sockaddr and
1502 * possibly with no sctp_ifa available. This is only called by the routine
1503 * that checks the addresses in an INIT-ACK against the current address list.
1504 * returns 0 if completed, non-zero if not completed.
1505 * NOTE: if an add is already scheduled (and not yet sent out), simply
1506 * remove it from queue. If a duplicate operation is found, ignore the
1507 * new one.
1508 */
1509 static int
1510 sctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa)
1511 {
1512 struct sctp_ifa *ifa;
1513 struct sctp_asconf_addr *aa, *aa_next;
1514 uint32_t vrf_id;
1515
1516 if (stcb == NULL) {
1517 return (-1);
1518 }
1519 /* see if peer supports ASCONF */
1520 if (stcb->asoc.peer_supports_asconf == 0) {
1521 return (-1);
1522 }
1523 /* make sure the request isn't already in the queue */
1524 for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL;
1525 aa = aa_next) {
1526 aa_next = TAILQ_NEXT(aa, next);
1527 /* address match? */
1528 if (sctp_asconf_addr_match(aa, sa) == 0)
1529 continue;
1530 /* is the request already in queue (sent or not) */
1531 if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
1532 return (-1);
1533 }
1534 /* is the negative request already in queue, and not sent */
1535 if (aa->sent == 1)
1536 continue;
1537 if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) {
1538 /* add already queued, so remove existing entry */
1539 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1540 sctp_del_local_addr_restricted(stcb, aa->ifa);
1541 /* free the entry */
1542 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1543 return (-1);
1544 }
1545 } /* for each aa */
1546
1547 /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */
1548 if (stcb) {
1549 vrf_id = stcb->asoc.vrf_id;
1550 } else {
1551 vrf_id = SCTP_DEFAULT_VRFID;
1552 }
1553 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
1554
1555 /* adding new request to the queue */
1556 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
1557 SCTP_M_ASC_ADDR);
1558 if (aa == NULL) {
1559 /* didn't get memory */
1560 SCTPDBG(SCTP_DEBUG_ASCONF1,
1561 "sctp_asconf_queue_sa_delete: failed to get memory!\n");
1562 return (-1);
1563 }
1564 aa->special_del = 0;
1565 /* fill in asconf address parameter fields */
1566 /* top level elements are "networked" during send */
1567 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
1568 aa->ifa = ifa;
1569 if (ifa)
1570 atomic_add_int(&ifa->refcount, 1);
1571 /* correlation_id filled in during send routine later... */
1572 if (sa->sa_family == AF_INET6) {
1573 /* IPv6 address */
1574 struct sockaddr_in6 *sin6;
1575
1576 sin6 = (struct sockaddr_in6 *)sa;
1577 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1578 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1579 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param);
1580 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1581 sizeof(struct in6_addr));
1582 } else if (sa->sa_family == AF_INET) {
1583 /* IPv4 address */
1584 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
1585
1586 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1587 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1588 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param);
1589 memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1590 sizeof(struct in_addr));
1591 } else {
1592 /* invalid family! */
1593 SCTP_FREE(aa, SCTP_M_ASC_ADDR);
1594 if (ifa)
1595 sctp_free_ifa(ifa);
1596 return (-1);
1597 }
1598 aa->sent = 0; /* clear sent flag */
1599
1600 /* delete goes to the back of the queue */
1601 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1602
1603 /* sa_ignore MEMLEAK {memory is put on the tailq} */
1604 return (0);
1605 }
1606
1607 /*
1608 * find a specific asconf param on our "sent" queue
1609 */
1610 static struct sctp_asconf_addr *
1611 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id)
1612 {
1613 struct sctp_asconf_addr *aa;
1614
1615 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
1616 if (aa->ap.aph.correlation_id == correlation_id &&
1617 aa->sent == 1) {
1618 /* found it */
1619 return (aa);
1620 }
1621 }
1622 /* didn't find it */
1623 return (NULL);
1624 }
1625
1626 /*
1627 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do
1628 * notifications based on the error response
1629 */
1630 static void
1631 sctp_asconf_process_error(struct sctp_tcb *stcb,
1632 struct sctp_asconf_paramhdr *aph)
1633 {
1634 struct sctp_error_cause *eh;
1635 struct sctp_paramhdr *ph;
1636 uint16_t param_type;
1637 uint16_t error_code;
1638
1639 eh = (struct sctp_error_cause *)(aph + 1);
1640 ph = (struct sctp_paramhdr *)(eh + 1);
1641 /* validate lengths */
1642 if (htons(eh->length) + sizeof(struct sctp_error_cause) >
1643 htons(aph->ph.param_length)) {
1644 /* invalid error cause length */
1645 SCTPDBG(SCTP_DEBUG_ASCONF1,
1646 "asconf_process_error: cause element too long\n");
1647 return;
1648 }
1649 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) >
1650 htons(eh->length)) {
1651 /* invalid included TLV length */
1652 SCTPDBG(SCTP_DEBUG_ASCONF1,
1653 "asconf_process_error: included TLV too long\n");
1654 return;
1655 }
1656 /* which error code ? */
1657 error_code = ntohs(eh->code);
1658 param_type = ntohs(aph->ph.param_type);
1659 /* FIX: this should go back up the REMOTE_ERROR ULP notify */
1660 switch (error_code) {
1661 case SCTP_CAUSE_RESOURCE_SHORTAGE:
1662 /* we allow ourselves to "try again" for this error */
1663 break;
1664 default:
1665 /* peer can't handle it... */
1666 switch (param_type) {
1667 case SCTP_ADD_IP_ADDRESS:
1668 case SCTP_DEL_IP_ADDRESS:
1669 stcb->asoc.peer_supports_asconf = 0;
1670 break;
1671 case SCTP_SET_PRIM_ADDR:
1672 stcb->asoc.peer_supports_asconf = 0;
1673 break;
1674 default:
1675 break;
1676 }
1677 }
1678 }
1679
1680 /*
1681 * process an asconf queue param.
1682 * aparam: parameter to process, will be removed from the queue.
1683 * flag: 1=success case, 0=failure case
1684 */
1685 static void
1686 sctp_asconf_process_param_ack(struct sctp_tcb *stcb,
1687 struct sctp_asconf_addr *aparam, uint32_t flag)
1688 {
1689 uint16_t param_type;
1690
1691 /* process this param */
1692 param_type = aparam->ap.aph.ph.param_type;
1693 switch (param_type) {
1694 case SCTP_ADD_IP_ADDRESS:
1695 SCTPDBG(SCTP_DEBUG_ASCONF1,
1696 "process_param_ack: added IP address\n");
1697 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, param_type, flag);
1698 break;
1699 case SCTP_DEL_IP_ADDRESS:
1700 SCTPDBG(SCTP_DEBUG_ASCONF1,
1701 "process_param_ack: deleted IP address\n");
1702 /* nothing really to do... lists already updated */
1703 break;
1704 case SCTP_SET_PRIM_ADDR:
1705 SCTPDBG(SCTP_DEBUG_ASCONF1,
1706 "process_param_ack: set primary IP address\n");
1707 /* nothing to do... peer may start using this addr */
1708 if (flag == 0)
1709 stcb->asoc.peer_supports_asconf = 0;
1710 break;
1711 default:
1712 /* should NEVER happen */
1713 break;
1714 }
1715
1716 /* remove the param and free it */
1717 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next);
1718 if (aparam->ifa)
1719 sctp_free_ifa(aparam->ifa);
1720 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1721 }
1722
1723 /*
1724 * cleanup from a bad asconf ack parameter
1725 */
1726 static void
1727 sctp_asconf_ack_clear(struct sctp_tcb *stcb)
1728 {
1729 /* assume peer doesn't really know how to do asconfs */
1730 stcb->asoc.peer_supports_asconf = 0;
1731 /* XXX we could free the pending queue here */
1732 }
1733
1734 void
1735 sctp_handle_asconf_ack(struct mbuf *m, int offset,
1736 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb,
1737 struct sctp_nets *net, int *abort_no_unlock)
1738 {
1739 struct sctp_association *asoc;
1740 uint32_t serial_num;
1741 uint16_t ack_length;
1742 struct sctp_asconf_paramhdr *aph;
1743 struct sctp_asconf_addr *aa, *aa_next;
1744 uint32_t last_error_id = 0; /* last error correlation id */
1745 uint32_t id;
1746 struct sctp_asconf_addr *ap;
1747
1748 /* asconf param buffer */
1749 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
1750
1751 /* verify minimum length */
1752 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) {
1753 SCTPDBG(SCTP_DEBUG_ASCONF1,
1754 "handle_asconf_ack: chunk too small = %xh\n",
1755 ntohs(cp->ch.chunk_length));
1756 return;
1757 }
1758 asoc = &stcb->asoc;
1759 serial_num = ntohl(cp->serial_number);
1760
1761 /*
1762 * NOTE: we may want to handle this differently- currently, we will
1763 * abort when we get an ack for the expected serial number + 1 (eg.
1764 * we didn't send it), process an ack normally if it is the expected
1765 * serial number, and re-send the previous ack for *ALL* other
1766 * serial numbers
1767 */
1768
1769 /*
1770 * if the serial number is the next expected, but I didn't send it,
1771 * abort the asoc, since someone probably just hijacked us...
1772 */
1773 if (serial_num == (asoc->asconf_seq_out + 1)) {
1774 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n");
1775 sctp_abort_an_association(stcb->sctp_ep, stcb,
1776 SCTP_CAUSE_ILLEGAL_ASCONF_ACK, NULL, SCTP_SO_NOT_LOCKED);
1777 *abort_no_unlock = 1;
1778 return;
1779 }
1780 if (serial_num != asoc->asconf_seq_out_acked + 1) {
1781 /* got a duplicate/unexpected ASCONF-ACK */
1782 SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n",
1783 serial_num, asoc->asconf_seq_out_acked + 1);
1784 return;
1785 }
1786 if (serial_num == asoc->asconf_seq_out - 1) {
1787 /* stop our timer */
1788 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net,
1789 SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3);
1790 }
1791 /* process the ASCONF-ACK contents */
1792 ack_length = ntohs(cp->ch.chunk_length) -
1793 sizeof(struct sctp_asconf_ack_chunk);
1794 offset += sizeof(struct sctp_asconf_ack_chunk);
1795 /* process through all parameters */
1796 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) {
1797 unsigned int param_length, param_type;
1798
1799 /* get pointer to next asconf parameter */
1800 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
1801 sizeof(struct sctp_asconf_paramhdr), aparam_buf);
1802 if (aph == NULL) {
1803 /* can't get an asconf paramhdr */
1804 sctp_asconf_ack_clear(stcb);
1805 return;
1806 }
1807 param_type = ntohs(aph->ph.param_type);
1808 param_length = ntohs(aph->ph.param_length);
1809 if (param_length > ack_length) {
1810 sctp_asconf_ack_clear(stcb);
1811 return;
1812 }
1813 if (param_length < sizeof(struct sctp_paramhdr)) {
1814 sctp_asconf_ack_clear(stcb);
1815 return;
1816 }
1817 /* get the complete parameter... */
1818 if (param_length > sizeof(aparam_buf)) {
1819 SCTPDBG(SCTP_DEBUG_ASCONF1,
1820 "param length (%u) larger than buffer size!\n", param_length);
1821 sctp_asconf_ack_clear(stcb);
1822 return;
1823 }
1824 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
1825 if (aph == NULL) {
1826 sctp_asconf_ack_clear(stcb);
1827 return;
1828 }
1829 /* correlation_id is transparent to peer, no ntohl needed */
1830 id = aph->correlation_id;
1831
1832 switch (param_type) {
1833 case SCTP_ERROR_CAUSE_IND:
1834 last_error_id = id;
1835 /* find the corresponding asconf param in our queue */
1836 ap = sctp_asconf_find_param(stcb, id);
1837 if (ap == NULL) {
1838 /* hmm... can't find this in our queue! */
1839 break;
1840 }
1841 /* process the parameter, failed flag */
1842 sctp_asconf_process_param_ack(stcb, ap, 0);
1843 /* process the error response */
1844 sctp_asconf_process_error(stcb, aph);
1845 break;
1846 case SCTP_SUCCESS_REPORT:
1847 /* find the corresponding asconf param in our queue */
1848 ap = sctp_asconf_find_param(stcb, id);
1849 if (ap == NULL) {
1850 /* hmm... can't find this in our queue! */
1851 break;
1852 }
1853 /* process the parameter, success flag */
1854 sctp_asconf_process_param_ack(stcb, ap, 1);
1855 break;
1856 default:
1857 break;
1858 } /* switch */
1859
1860 /* update remaining ASCONF-ACK message length to process */
1861 ack_length -= SCTP_SIZE32(param_length);
1862 if (ack_length <= 0) {
1863 /* no more data in the mbuf chain */
1864 break;
1865 }
1866 offset += SCTP_SIZE32(param_length);
1867 } /* while */
1868
1869 /*
1870 * if there are any "sent" params still on the queue, these are
1871 * implicitly "success", or "failed" (if we got an error back) ...
1872 * so process these appropriately
1873 *
1874 * we assume that the correlation_id's are monotonically increasing
1875 * beginning from 1 and that we don't have *that* many outstanding
1876 * at any given time
1877 */
1878 if (last_error_id == 0)
1879 last_error_id--;/* set to "max" value */
1880 for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL;
1881 aa = aa_next) {
1882 aa_next = TAILQ_NEXT(aa, next);
1883 if (aa->sent == 1) {
1884 /*
1885 * implicitly successful or failed if correlation_id
1886 * < last_error_id, then success else, failure
1887 */
1888 if (aa->ap.aph.correlation_id < last_error_id)
1889 sctp_asconf_process_param_ack(stcb, aa, 1);
1890 else
1891 sctp_asconf_process_param_ack(stcb, aa, 0);
1892 } else {
1893 /*
1894 * since we always process in order (FIFO queue) if
1895 * we reach one that hasn't been sent, the rest
1896 * should not have been sent either. so, we're
1897 * done...
1898 */
1899 break;
1900 }
1901 }
1902
1903 /* update the next sequence number to use */
1904 asoc->asconf_seq_out_acked++;
1905 /* remove the old ASCONF on our outbound queue */
1906 sctp_toss_old_asconf(stcb);
1907 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) {
1908 #ifdef SCTP_TIMER_BASED_ASCONF
1909 /* we have more params, so restart our timer */
1910 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep,
1911 stcb, net);
1912 #else
1913 /* we have more params, so send out more */
1914 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1915 #endif
1916 }
1917 }
1918
1919 #ifdef INET6
1920 static uint32_t
1921 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa)
1922 {
1923 struct sockaddr_in6 *sin6, *net6;
1924 struct sctp_nets *net;
1925
1926 if (sa->sa_family != AF_INET6) {
1927 /* wrong family */
1928 return (0);
1929 }
1930 sin6 = (struct sockaddr_in6 *)sa;
1931 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) {
1932 /* not link local address */
1933 return (0);
1934 }
1935 /* hunt through our destination nets list for this scope_id */
1936 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1937 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family !=
1938 AF_INET6)
1939 continue;
1940 net6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1941 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0)
1942 continue;
1943 if (sctp_is_same_scope(sin6, net6)) {
1944 /* found one */
1945 return (1);
1946 }
1947 }
1948 /* didn't find one */
1949 return (0);
1950 }
1951
1952 #endif
1953
1954 /*
1955 * address management functions
1956 */
1957 static void
1958 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1959 struct sctp_ifa *ifa, uint16_t type, int addr_locked)
1960 {
1961 int status;
1962
1963
1964 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 &&
1965 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
1966 /* subset bound, no ASCONF allowed case, so ignore */
1967 return;
1968 }
1969 /*
1970 * note: we know this is not the subset bound, no ASCONF case eg.
1971 * this is boundall or subset bound w/ASCONF allowed
1972 */
1973
1974 /* first, make sure it's a good address family */
1975 if (ifa->address.sa.sa_family != AF_INET6 &&
1976 ifa->address.sa.sa_family != AF_INET) {
1977 return;
1978 }
1979 /* make sure we're "allowed" to add this type of addr */
1980 if (ifa->address.sa.sa_family == AF_INET6) {
1981 /* invalid if we're not a v6 endpoint */
1982 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)
1983 return;
1984 /* is the v6 addr really valid ? */
1985 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1986 return;
1987 }
1988 }
1989 /* put this address on the "pending/do not use yet" list */
1990 sctp_add_local_addr_restricted(stcb, ifa);
1991 /*
1992 * check address scope if address is out of scope, don't queue
1993 * anything... note: this would leave the address on both inp and
1994 * asoc lists
1995 */
1996 switch (ifa->address.sa.sa_family) {
1997 #ifdef INET6
1998 case AF_INET6:
1999 {
2000 struct sockaddr_in6 *sin6;
2001
2002 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
2003 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2004 /* we skip unspecifed addresses */
2005 return;
2006 }
2007 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2008 if (stcb->asoc.local_scope == 0) {
2009 return;
2010 }
2011 /* is it the right link local scope? */
2012 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
2013 return;
2014 }
2015 }
2016 if (stcb->asoc.site_scope == 0 &&
2017 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
2018 return;
2019 }
2020 break;
2021 }
2022 #endif
2023 case AF_INET:
2024 {
2025 struct sockaddr_in *sin;
2026 struct in6pcb *inp6;
2027
2028 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2029 /* invalid if we are a v6 only endpoint */
2030 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2031 SCTP_IPV6_V6ONLY(inp6))
2032 return;
2033
2034 sin = (struct sockaddr_in *)&ifa->address.sa;
2035 if (sin->sin_addr.s_addr == 0) {
2036 /* we skip unspecifed addresses */
2037 return;
2038 }
2039 if (stcb->asoc.ipv4_local_scope == 0 &&
2040 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2041 return;
2042 }
2043 break;
2044 }
2045 default:
2046 /* else, not AF_INET or AF_INET6, so skip */
2047 return;
2048 }
2049
2050 /* queue an asconf for this address add/delete */
2051 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
2052 /* does the peer do asconf? */
2053 if (stcb->asoc.peer_supports_asconf) {
2054 /* queue an asconf for this addr */
2055 status = sctp_asconf_queue_add(stcb, ifa, type);
2056
2057 /*
2058 * if queued ok, and in the open state, send out the
2059 * ASCONF. If in the non-open state, these will be
2060 * sent when the state goes open.
2061 */
2062 if (status == 0 &&
2063 SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2064 #ifdef SCTP_TIMER_BASED_ASCONF
2065 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
2066 stcb, stcb->asoc.primary_destination);
2067 #else
2068 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2069 addr_locked);
2070 #endif
2071 }
2072 }
2073 }
2074 }
2075
2076
2077 int
2078 sctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val)
2079 {
2080 struct sctp_asconf_iterator *asc;
2081 struct sctp_ifa *ifa;
2082 struct sctp_laddr *l;
2083 int type;
2084 int cnt_invalid = 0;
2085
2086 asc = (struct sctp_asconf_iterator *)ptr;
2087 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2088 ifa = l->ifa;
2089 type = l->action;
2090 if (ifa->address.sa.sa_family == AF_INET6) {
2091 /* invalid if we're not a v6 endpoint */
2092 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2093 cnt_invalid++;
2094 if (asc->cnt == cnt_invalid)
2095 return (1);
2096 else
2097 continue;
2098 }
2099 } else if (ifa->address.sa.sa_family == AF_INET) {
2100 /* invalid if we are a v6 only endpoint */
2101 struct in6pcb *inp6;
2102
2103 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2104 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2105 SCTP_IPV6_V6ONLY(inp6)) {
2106 cnt_invalid++;
2107 if (asc->cnt == cnt_invalid)
2108 return (1);
2109 else
2110 continue;
2111 }
2112 } else {
2113 /* invalid address family */
2114 cnt_invalid++;
2115 if (asc->cnt == cnt_invalid)
2116 return (1);
2117 else
2118 continue;
2119 }
2120 }
2121 return (0);
2122 }
2123
2124 static int
2125 sctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val)
2126 {
2127 struct sctp_ifa *ifa;
2128 struct sctp_asconf_iterator *asc;
2129 struct sctp_laddr *laddr, *nladdr, *l;
2130
2131 /* Only for specific case not bound all */
2132 asc = (struct sctp_asconf_iterator *)ptr;
2133 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2134 ifa = l->ifa;
2135 if (l->action == SCTP_ADD_IP_ADDRESS) {
2136 LIST_FOREACH(laddr, &inp->sctp_addr_list,
2137 sctp_nxt_addr) {
2138 if (laddr->ifa == ifa) {
2139 laddr->action = 0;
2140 break;
2141 }
2142 }
2143 } else if (l->action == SCTP_DEL_IP_ADDRESS) {
2144 laddr = LIST_FIRST(&inp->sctp_addr_list);
2145 while (laddr) {
2146 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2147 /* remove only after all guys are done */
2148 if (laddr->ifa == ifa) {
2149 sctp_del_local_addr_ep(inp, ifa);
2150 }
2151 laddr = nladdr;
2152 }
2153 }
2154 }
2155 return (0);
2156 }
2157
2158 void
2159 sctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2160 void *ptr, uint32_t val)
2161 {
2162 struct sctp_asconf_iterator *asc;
2163 struct sctp_ifa *ifa;
2164 struct sctp_laddr *l;
2165 int cnt_invalid = 0;
2166 int type, status;
2167 int num_queued = 0;
2168
2169 asc = (struct sctp_asconf_iterator *)ptr;
2170 LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) {
2171 ifa = l->ifa;
2172 type = l->action;
2173
2174 /* address's vrf_id must be the vrf_id of the assoc */
2175 if (ifa->vrf_id != stcb->asoc.vrf_id) {
2176 continue;
2177 }
2178 /* Same checks again for assoc */
2179 switch (ifa->address.sa.sa_family) {
2180 #ifdef INET6
2181 case AF_INET6:
2182 {
2183 /* invalid if we're not a v6 endpoint */
2184 struct sockaddr_in6 *sin6;
2185
2186 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
2187 cnt_invalid++;
2188 if (asc->cnt == cnt_invalid)
2189 return;
2190 else
2191 continue;
2192 }
2193 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
2194 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2195 /* we skip unspecifed addresses */
2196 continue;
2197 }
2198 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2199 if (stcb->asoc.local_scope == 0) {
2200 continue;
2201 }
2202 /* is it the right link local scope? */
2203 if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) {
2204 continue;
2205 }
2206 }
2207 break;
2208 }
2209 #endif
2210 case AF_INET:
2211 {
2212 /* invalid if we are a v6 only endpoint */
2213 struct in6pcb *inp6;
2214 struct sockaddr_in *sin;
2215
2216 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
2217 /* invalid if we are a v6 only endpoint */
2218 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2219 SCTP_IPV6_V6ONLY(inp6))
2220 continue;
2221
2222 sin = (struct sockaddr_in *)&ifa->address.sa;
2223 if (sin->sin_addr.s_addr == 0) {
2224 /* we skip unspecifed addresses */
2225 continue;
2226 }
2227 if (stcb->asoc.ipv4_local_scope == 0 &&
2228 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2229 continue;
2230 }
2231 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2232 SCTP_IPV6_V6ONLY(inp6)) {
2233 cnt_invalid++;
2234 if (asc->cnt == cnt_invalid)
2235 return;
2236 else
2237 continue;
2238 }
2239 break;
2240 }
2241 default:
2242 /* invalid address family */
2243 cnt_invalid++;
2244 if (asc->cnt == cnt_invalid)
2245 return;
2246 else
2247 continue;
2248 break;
2249 }
2250
2251 if (type == SCTP_ADD_IP_ADDRESS) {
2252 /* prevent this address from being used as a source */
2253 sctp_add_local_addr_restricted(stcb, ifa);
2254 } else if (type == SCTP_DEL_IP_ADDRESS) {
2255 struct sctp_nets *net;
2256
2257 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2258 sctp_rtentry_t *rt;
2259
2260 /* delete this address if cached */
2261 if (net->ro._s_addr == ifa) {
2262 sctp_free_ifa(net->ro._s_addr);
2263 net->ro._s_addr = NULL;
2264 net->src_addr_selected = 0;
2265 rt = net->ro.ro_rt;
2266 if (rt) {
2267 RTFREE(rt);
2268 net->ro.ro_rt = NULL;
2269 }
2270 /*
2271 * Now we deleted our src address,
2272 * should we not also now reset the
2273 * cwnd/rto to start as if its a new
2274 * address?
2275 */
2276 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
2277 net->RTO = 0;
2278
2279 }
2280 }
2281 } else if (type == SCTP_SET_PRIM_ADDR) {
2282 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2283 /* must validate the ifa is in the ep */
2284 if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) {
2285 continue;
2286 }
2287 } else {
2288 /* Need to check scopes for this guy */
2289 if (sctp_is_address_in_scope(ifa,
2290 stcb->asoc.ipv4_addr_legal,
2291 stcb->asoc.ipv6_addr_legal,
2292 stcb->asoc.loopback_scope,
2293 stcb->asoc.ipv4_local_scope,
2294 stcb->asoc.local_scope,
2295 stcb->asoc.site_scope, 0) == 0) {
2296 continue;
2297 }
2298 }
2299 }
2300 /* queue an asconf for this address add/delete */
2301 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) &&
2302 stcb->asoc.peer_supports_asconf) {
2303 /* queue an asconf for this addr */
2304 status = sctp_asconf_queue_add(stcb, ifa, type);
2305 /*
2306 * if queued ok, and in the open state, update the
2307 * count of queued params. If in the non-open
2308 * state, these get sent when the assoc goes open.
2309 */
2310 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2311 if (status >= 0) {
2312 num_queued++;
2313 }
2314 }
2315 }
2316 }
2317 /*
2318 * If we have queued params in the open state, send out an ASCONF.
2319 */
2320 if (num_queued > 0) {
2321 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2322 SCTP_ADDR_NOT_LOCKED);
2323 }
2324 }
2325
2326 void
2327 sctp_asconf_iterator_end(void *ptr, uint32_t val)
2328 {
2329 struct sctp_asconf_iterator *asc;
2330 struct sctp_ifa *ifa;
2331 struct sctp_laddr *l, *l_next;
2332
2333 asc = (struct sctp_asconf_iterator *)ptr;
2334 l = LIST_FIRST(&asc->list_of_work);
2335 while (l != NULL) {
2336 l_next = LIST_NEXT(l, sctp_nxt_addr);
2337 ifa = l->ifa;
2338 if (l->action == SCTP_ADD_IP_ADDRESS) {
2339 /* Clear the defer use flag */
2340 ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
2341 }
2342 sctp_free_ifa(ifa);
2343 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l);
2344 SCTP_DECR_LADDR_COUNT();
2345 l = l_next;
2346 }
2347 SCTP_FREE(asc, SCTP_M_ASC_IT);
2348 }
2349
2350 /*
2351 * sa is the sockaddr to ask the peer to set primary to.
2352 * returns: 0 = completed, -1 = error
2353 */
2354 int32_t
2355 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
2356 {
2357 uint32_t vrf_id;
2358 struct sctp_ifa *ifa;
2359
2360 /* find the ifa for the desired set primary */
2361 vrf_id = stcb->asoc.vrf_id;
2362 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
2363 if (ifa == NULL) {
2364 /* Invalid address */
2365 return (-1);
2366 }
2367 /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2368 if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) {
2369 /* set primary queuing succeeded */
2370 SCTPDBG(SCTP_DEBUG_ASCONF1,
2371 "set_primary_ip_address_sa: queued on tcb=%p, ",
2372 stcb);
2373 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2374 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2375 #ifdef SCTP_TIMER_BASED_ASCONF
2376 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2377 stcb->sctp_ep, stcb,
2378 stcb->asoc.primary_destination);
2379 #else
2380 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2381 SCTP_ADDR_NOT_LOCKED);
2382 #endif
2383 }
2384 } else {
2385 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ",
2386 stcb);
2387 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa);
2388 return (-1);
2389 }
2390 return (0);
2391 }
2392
2393 void
2394 sctp_set_primary_ip_address(struct sctp_ifa *ifa)
2395 {
2396 struct sctp_inpcb *inp;
2397
2398 /* go through all our PCB's */
2399 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
2400 struct sctp_tcb *stcb;
2401
2402 /* process for all associations for this endpoint */
2403 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
2404 /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2405 if (!sctp_asconf_queue_add(stcb, ifa,
2406 SCTP_SET_PRIM_ADDR)) {
2407 /* set primary queuing succeeded */
2408 SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ",
2409 stcb);
2410 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa);
2411 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2412 #ifdef SCTP_TIMER_BASED_ASCONF
2413 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2414 stcb->sctp_ep, stcb,
2415 stcb->asoc.primary_destination);
2416 #else
2417 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2418 SCTP_ADDR_NOT_LOCKED);
2419 #endif
2420 }
2421 }
2422 } /* for each stcb */
2423 } /* for each inp */
2424 }
2425
2426 int
2427 sctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa)
2428 {
2429 struct sctp_tmit_chunk *chk, *nchk;
2430 unsigned int offset, asconf_limit;
2431 struct sctp_asconf_chunk *acp;
2432 struct sctp_asconf_paramhdr *aph;
2433 uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE];
2434 struct sctp_ipv6addr_param *p_addr;
2435 int add_cnt, del_cnt;
2436 uint16_t last_param_type;
2437
2438 add_cnt = del_cnt = 0;
2439 last_param_type = 0;
2440 for (chk = TAILQ_FIRST(&stcb->asoc.asconf_send_queue); chk != NULL;
2441 chk = nchk) {
2442 /* get next chk */
2443 nchk = TAILQ_NEXT(chk, sctp_next);
2444
2445 if (chk->data == NULL) {
2446 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n");
2447 continue;
2448 }
2449 offset = 0;
2450 acp = mtod(chk->data, struct sctp_asconf_chunk *);
2451 offset += sizeof(struct sctp_asconf_chunk);
2452 asconf_limit = ntohs(acp->ch.chunk_length);
2453 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf);
2454 if (p_addr == NULL) {
2455 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n");
2456 continue;
2457 }
2458 offset += ntohs(p_addr->ph.param_length);
2459
2460 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2461 if (aph == NULL) {
2462 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n");
2463 continue;
2464 }
2465 while (aph != NULL) {
2466 unsigned int param_length, param_type;
2467
2468 param_type = ntohs(aph->ph.param_type);
2469 param_length = ntohs(aph->ph.param_length);
2470 if (offset + param_length > asconf_limit) {
2471 /* parameter goes beyond end of chunk! */
2472 break;
2473 }
2474 if (param_length > sizeof(aparam_buf)) {
2475 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length);
2476 break;
2477 }
2478 if (param_length <= sizeof(struct sctp_paramhdr)) {
2479 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length);
2480 break;
2481 }
2482 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf);
2483 if (aph == NULL) {
2484 SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n");
2485 break;
2486 }
2487 p_addr = (struct sctp_ipv6addr_param *)(aph + 1);
2488 if (sctp_addr_match(p_addr, &sctp_ifa->address.sa) != 0) {
2489 switch (param_type) {
2490 case SCTP_ADD_IP_ADDRESS:
2491 add_cnt++;
2492 break;
2493 case SCTP_DEL_IP_ADDRESS:
2494 del_cnt++;
2495 break;
2496 default:
2497 break;
2498 }
2499 last_param_type = param_type;
2500 }
2501 offset += SCTP_SIZE32(param_length);
2502 if (offset >= asconf_limit) {
2503 /* no more data in the mbuf chain */
2504 break;
2505 }
2506 /* get pointer to next asconf param */
2507 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf);
2508 }
2509 }
2510
2511 /*
2512 * we want to find the sequences which consist of ADD -> DEL -> ADD
2513 * or DEL -> ADD
2514 */
2515 if (add_cnt > del_cnt ||
2516 (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) {
2517 return 1;
2518 }
2519 return 0;
2520 }
2521
2522 static struct sockaddr *
2523 sctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked)
2524 {
2525 struct sctp_vrf *vrf = NULL;
2526 struct sctp_ifn *sctp_ifn;
2527 struct sctp_ifa *sctp_ifa;
2528
2529 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2530 SCTP_IPI_ADDR_RLOCK();
2531 vrf = sctp_find_vrf(stcb->asoc.vrf_id);
2532 if (vrf == NULL) {
2533 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2534 SCTP_IPI_ADDR_RUNLOCK();
2535 return (NULL);
2536 }
2537 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2538 if (stcb->asoc.loopback_scope == 0 &&
2539 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2540 /* Skip if loopback_scope not set */
2541 continue;
2542 }
2543 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2544 if (sctp_ifa->address.sa.sa_family == AF_INET &&
2545 stcb->asoc.ipv4_addr_legal) {
2546 struct sockaddr_in *sin;
2547
2548 sin = (struct sockaddr_in *)&sctp_ifa->address.sa;
2549 if (sin->sin_addr.s_addr == 0) {
2550 /* skip unspecifed addresses */
2551 continue;
2552 }
2553 if (stcb->asoc.ipv4_local_scope == 0 &&
2554 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))
2555 continue;
2556
2557 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2558 (!sctp_is_addr_pending(stcb, sctp_ifa)))
2559 continue;
2560 /* found a valid local v4 address to use */
2561 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2562 SCTP_IPI_ADDR_RUNLOCK();
2563 return (&sctp_ifa->address.sa);
2564 } else if (sctp_ifa->address.sa.sa_family == AF_INET6 &&
2565 stcb->asoc.ipv6_addr_legal) {
2566 struct sockaddr_in6 *sin6;
2567
2568 if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2569 continue;
2570 }
2571 sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sa;
2572 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2573 /* we skip unspecifed addresses */
2574 continue;
2575 }
2576 if (stcb->asoc.local_scope == 0 &&
2577 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
2578 continue;
2579 if (stcb->asoc.site_scope == 0 &&
2580 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))
2581 continue;
2582
2583 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
2584 (!sctp_is_addr_pending(stcb, sctp_ifa)))
2585 continue;
2586 /* found a valid local v6 address to use */
2587 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2588 SCTP_IPI_ADDR_RUNLOCK();
2589 return (&sctp_ifa->address.sa);
2590 }
2591 }
2592 }
2593 /* no valid addresses found */
2594 if (addr_locked == SCTP_ADDR_NOT_LOCKED)
2595 SCTP_IPI_ADDR_RUNLOCK();
2596 return (NULL);
2597 }
2598
2599 static struct sockaddr *
2600 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb)
2601 {
2602 struct sctp_laddr *laddr;
2603
2604 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
2605 if (laddr->ifa == NULL) {
2606 continue;
2607 }
2608 /* is the address restricted ? */
2609 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
2610 (!sctp_is_addr_pending(stcb, laddr->ifa)))
2611 continue;
2612
2613 /* found a valid local address to use */
2614 return (&laddr->ifa->address.sa);
2615 }
2616 /* no valid addresses found */
2617 return (NULL);
2618 }
2619
2620 /*
2621 * builds an ASCONF chunk from queued ASCONF params.
2622 * returns NULL on error (no mbuf, no ASCONF params queued, etc).
2623 */
2624 struct mbuf *
2625 sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked)
2626 {
2627 struct mbuf *m_asconf, *m_asconf_chk;
2628 struct sctp_asconf_addr *aa;
2629 struct sctp_asconf_chunk *acp;
2630 struct sctp_asconf_paramhdr *aph;
2631 struct sctp_asconf_addr_param *aap;
2632 uint32_t p_length;
2633 uint32_t correlation_id = 1; /* 0 is reserved... */
2634 caddr_t ptr, lookup_ptr;
2635 uint8_t lookup_used = 0;
2636
2637 /* are there any asconf params to send? */
2638 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2639 if (aa->sent == 0)
2640 break;
2641 }
2642 if (aa == NULL)
2643 return (NULL);
2644
2645 /*
2646 * get a chunk header mbuf and a cluster for the asconf params since
2647 * it's simpler to fill in the asconf chunk header lookup address on
2648 * the fly
2649 */
2650 m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_DONTWAIT, 1, MT_DATA);
2651 if (m_asconf_chk == NULL) {
2652 /* no mbuf's */
2653 SCTPDBG(SCTP_DEBUG_ASCONF1,
2654 "compose_asconf: couldn't get chunk mbuf!\n");
2655 return (NULL);
2656 }
2657 m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
2658 if (m_asconf == NULL) {
2659 /* no mbuf's */
2660 SCTPDBG(SCTP_DEBUG_ASCONF1,
2661 "compose_asconf: couldn't get mbuf!\n");
2662 sctp_m_freem(m_asconf_chk);
2663 return (NULL);
2664 }
2665 SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk);
2666 SCTP_BUF_LEN(m_asconf) = 0;
2667 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *);
2668 bzero(acp, sizeof(struct sctp_asconf_chunk));
2669 /* save pointers to lookup address and asconf params */
2670 lookup_ptr = (caddr_t)(acp + 1); /* after the header */
2671 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */
2672
2673 /* fill in chunk header info */
2674 acp->ch.chunk_type = SCTP_ASCONF;
2675 acp->ch.chunk_flags = 0;
2676 acp->serial_number = htonl(stcb->asoc.asconf_seq_out);
2677 stcb->asoc.asconf_seq_out++;
2678
2679 /* add parameters... up to smallest MTU allowed */
2680 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2681 if (aa->sent)
2682 continue;
2683 /* get the parameter length */
2684 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length);
2685 /* will it fit in current chunk? */
2686 if (SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) {
2687 /* won't fit, so we're done with this chunk */
2688 break;
2689 }
2690 /* assign (and store) a correlation id */
2691 aa->ap.aph.correlation_id = correlation_id++;
2692
2693 /*
2694 * fill in address if we're doing a delete this is a simple
2695 * way for us to fill in the correlation address, which
2696 * should only be used by the peer if we're deleting our
2697 * source address and adding a new address (e.g. renumbering
2698 * case)
2699 */
2700 if (lookup_used == 0 &&
2701 (aa->special_del == 0) &&
2702 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
2703 struct sctp_ipv6addr_param *lookup;
2704 uint16_t p_size, addr_size;
2705
2706 lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2707 lookup->ph.param_type =
2708 htons(aa->ap.addrp.ph.param_type);
2709 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) {
2710 /* copy IPv6 address */
2711 p_size = sizeof(struct sctp_ipv6addr_param);
2712 addr_size = sizeof(struct in6_addr);
2713 } else {
2714 /* copy IPv4 address */
2715 p_size = sizeof(struct sctp_ipv4addr_param);
2716 addr_size = sizeof(struct in_addr);
2717 }
2718 lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2719 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size);
2720 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2721 lookup_used = 1;
2722 }
2723 /* copy into current space */
2724 memcpy(ptr, &aa->ap, p_length);
2725
2726 /* network elements and update lengths */
2727 aph = (struct sctp_asconf_paramhdr *)ptr;
2728 aap = (struct sctp_asconf_addr_param *)ptr;
2729 /* correlation_id is transparent to peer, no htonl needed */
2730 aph->ph.param_type = htons(aph->ph.param_type);
2731 aph->ph.param_length = htons(aph->ph.param_length);
2732 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type);
2733 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length);
2734
2735 SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length);
2736 ptr += SCTP_SIZE32(p_length);
2737
2738 /*
2739 * these params are removed off the pending list upon
2740 * getting an ASCONF-ACK back from the peer, just set flag
2741 */
2742 aa->sent = 1;
2743 }
2744 /* check to see if the lookup addr has been populated yet */
2745 if (lookup_used == 0) {
2746 /* NOTE: if the address param is optional, can skip this... */
2747 /* add any valid (existing) address... */
2748 struct sctp_ipv6addr_param *lookup;
2749 uint16_t p_size, addr_size;
2750 struct sockaddr *found_addr;
2751 caddr_t addr_ptr;
2752
2753 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)
2754 found_addr = sctp_find_valid_localaddr(stcb,
2755 addr_locked);
2756 else
2757 found_addr = sctp_find_valid_localaddr_ep(stcb);
2758
2759 lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2760 if (found_addr != NULL) {
2761 if (found_addr->sa_family == AF_INET6) {
2762 /* copy IPv6 address */
2763 lookup->ph.param_type =
2764 htons(SCTP_IPV6_ADDRESS);
2765 p_size = sizeof(struct sctp_ipv6addr_param);
2766 addr_size = sizeof(struct in6_addr);
2767 addr_ptr = (caddr_t)&((struct sockaddr_in6 *)
2768 found_addr)->sin6_addr;
2769 } else {
2770 /* copy IPv4 address */
2771 lookup->ph.param_type =
2772 htons(SCTP_IPV4_ADDRESS);
2773 p_size = sizeof(struct sctp_ipv4addr_param);
2774 addr_size = sizeof(struct in_addr);
2775 addr_ptr = (caddr_t)&((struct sockaddr_in *)
2776 found_addr)->sin_addr;
2777 }
2778 lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2779 memcpy(lookup->addr, addr_ptr, addr_size);
2780 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size);
2781 lookup_used = 1;
2782 } else {
2783 /* uh oh... don't have any address?? */
2784 SCTPDBG(SCTP_DEBUG_ASCONF1,
2785 "compose_asconf: no lookup addr!\n");
2786 /* for now, we send a IPv4 address of 0.0.0.0 */
2787 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS);
2788 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)));
2789 bzero(lookup->addr, sizeof(struct in_addr));
2790 SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param));
2791 lookup_used = 1;
2792 }
2793 }
2794 /* chain it all together */
2795 SCTP_BUF_NEXT(m_asconf_chk) = m_asconf;
2796 *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf);
2797 acp->ch.chunk_length = ntohs(*retlen);
2798
2799 return (m_asconf_chk);
2800 }
2801
2802 /*
2803 * section to handle address changes before an association is up eg. changes
2804 * during INIT/INIT-ACK/COOKIE-ECHO handshake
2805 */
2806
2807 /*
2808 * processes the (local) addresses in the INIT-ACK chunk
2809 */
2810 static void
2811 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m,
2812 unsigned int offset, unsigned int length)
2813 {
2814 struct sctp_paramhdr tmp_param, *ph;
2815 uint16_t plen, ptype;
2816 struct sctp_ifa *sctp_ifa;
2817 struct sctp_ipv6addr_param addr_store;
2818 struct sockaddr_in6 sin6;
2819 struct sockaddr_in sin;
2820 struct sockaddr *sa;
2821 uint32_t vrf_id;
2822
2823 SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n");
2824 if (stcb == NULL) /* Un-needed check for SA */
2825 return;
2826
2827 /* convert to upper bound */
2828 length += offset;
2829
2830 if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2831 return;
2832 }
2833 /* init the addresses */
2834 bzero(&sin6, sizeof(sin6));
2835 sin6.sin6_family = AF_INET6;
2836 sin6.sin6_len = sizeof(sin6);
2837 sin6.sin6_port = stcb->rport;
2838
2839 bzero(&sin, sizeof(sin));
2840 sin.sin_len = sizeof(sin);
2841 sin.sin_family = AF_INET;
2842 sin.sin_port = stcb->rport;
2843
2844 /* go through the addresses in the init-ack */
2845 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2846 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param);
2847 while (ph != NULL) {
2848 ptype = ntohs(ph->param_type);
2849 plen = ntohs(ph->param_length);
2850 if (ptype == SCTP_IPV6_ADDRESS) {
2851 struct sctp_ipv6addr_param *a6p;
2852
2853 /* get the entire IPv6 address param */
2854 a6p = (struct sctp_ipv6addr_param *)
2855 sctp_m_getptr(m, offset,
2856 sizeof(struct sctp_ipv6addr_param),
2857 (uint8_t *) & addr_store);
2858 if (plen != sizeof(struct sctp_ipv6addr_param) ||
2859 a6p == NULL) {
2860 return;
2861 }
2862 memcpy(&sin6.sin6_addr, a6p->addr,
2863 sizeof(struct in6_addr));
2864 sa = (struct sockaddr *)&sin6;
2865 } else if (ptype == SCTP_IPV4_ADDRESS) {
2866 struct sctp_ipv4addr_param *a4p;
2867
2868 /* get the entire IPv4 address param */
2869 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset,
2870 sizeof(struct sctp_ipv4addr_param),
2871 (uint8_t *) & addr_store);
2872 if (plen != sizeof(struct sctp_ipv4addr_param) ||
2873 a4p == NULL) {
2874 return;
2875 }
2876 sin.sin_addr.s_addr = a4p->addr;
2877 sa = (struct sockaddr *)&sin;
2878 } else {
2879 goto next_addr;
2880 }
2881
2882 /* see if this address really (still) exists */
2883 if (stcb) {
2884 vrf_id = stcb->asoc.vrf_id;
2885 } else {
2886 vrf_id = SCTP_DEFAULT_VRFID;
2887 }
2888 sctp_ifa = sctp_find_ifa_by_addr(sa, vrf_id,
2889 SCTP_ADDR_NOT_LOCKED);
2890 if (sctp_ifa == NULL) {
2891 /* address doesn't exist anymore */
2892 int status;
2893
2894 /* are ASCONFs allowed ? */
2895 if ((sctp_is_feature_on(stcb->sctp_ep,
2896 SCTP_PCB_FLAGS_DO_ASCONF)) &&
2897 stcb->asoc.peer_supports_asconf) {
2898 /* queue an ASCONF DEL_IP_ADDRESS */
2899 status = sctp_asconf_queue_sa_delete(stcb, sa);
2900 /*
2901 * if queued ok, and in correct state, send
2902 * out the ASCONF.
2903 */
2904 if (status == 0 &&
2905 SCTP_GET_STATE(&stcb->asoc) ==
2906 SCTP_STATE_OPEN) {
2907 #ifdef SCTP_TIMER_BASED_ASCONF
2908 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2909 stcb->sctp_ep, stcb,
2910 stcb->asoc.primary_destination);
2911 #else
2912 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2913 SCTP_ADDR_NOT_LOCKED);
2914 #endif
2915 }
2916 }
2917 }
2918 next_addr:
2919 /*
2920 * Sanity check: Make sure the length isn't 0, otherwise
2921 * we'll be stuck in this loop for a long time...
2922 */
2923 if (SCTP_SIZE32(plen) == 0) {
2924 SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n",
2925 plen, ptype);
2926 return;
2927 }
2928 /* get next parameter */
2929 offset += SCTP_SIZE32(plen);
2930 if ((offset + sizeof(struct sctp_paramhdr)) > length)
2931 return;
2932 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2933 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param);
2934 } /* while */
2935 }
2936
2937 /* FIX ME: need to verify return result for v6 address type if v6 disabled */
2938 /*
2939 * checks to see if a specific address is in the initack address list returns
2940 * 1 if found, 0 if not
2941 */
2942 static uint32_t
2943 sctp_addr_in_initack(struct sctp_tcb *stcb, struct mbuf *m, uint32_t offset,
2944 uint32_t length, struct sockaddr *sa)
2945 {
2946 struct sctp_paramhdr tmp_param, *ph;
2947 uint16_t plen, ptype;
2948 struct sctp_ipv6addr_param addr_store;
2949 struct sockaddr_in *sin;
2950 struct sctp_ipv4addr_param *a4p;
2951
2952 #ifdef INET6
2953 struct sockaddr_in6 *sin6;
2954 struct sctp_ipv6addr_param *a6p;
2955 struct sockaddr_in6 sin6_tmp;
2956
2957 #endif /* INET6 */
2958
2959 if (
2960 #ifdef INET6
2961 (sa->sa_family != AF_INET6) &&
2962 #endif /* INET6 */
2963 (sa->sa_family != AF_INET))
2964 return (0);
2965
2966 SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for ");
2967 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa);
2968 /* convert to upper bound */
2969 length += offset;
2970
2971 if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2972 SCTPDBG(SCTP_DEBUG_ASCONF1,
2973 "find_initack_addr: invalid offset?\n");
2974 return (0);
2975 }
2976 /* go through the addresses in the init-ack */
2977 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2978 sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param);
2979 while (ph != NULL) {
2980 ptype = ntohs(ph->param_type);
2981 plen = ntohs(ph->param_length);
2982 #ifdef INET6
2983 if (ptype == SCTP_IPV6_ADDRESS && sa->sa_family == AF_INET6) {
2984 /* get the entire IPv6 address param */
2985 a6p = (struct sctp_ipv6addr_param *)
2986 sctp_m_getptr(m, offset,
2987 sizeof(struct sctp_ipv6addr_param),
2988 (uint8_t *) & addr_store);
2989 if (plen != sizeof(struct sctp_ipv6addr_param) ||
2990 (ph == NULL) ||
2991 (a6p == NULL)) {
2992 return (0);
2993 }
2994 sin6 = (struct sockaddr_in6 *)sa;
2995 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
2996 /* create a copy and clear scope */
2997 memcpy(&sin6_tmp, sin6,
2998 sizeof(struct sockaddr_in6));
2999 sin6 = &sin6_tmp;
3000 in6_clearscope(&sin6->sin6_addr);
3001 }
3002 if (memcmp(&sin6->sin6_addr, a6p->addr,
3003 sizeof(struct in6_addr)) == 0) {
3004 /* found it */
3005 return (1);
3006 }
3007 } else
3008 #endif /* INET6 */
3009
3010 if (ptype == SCTP_IPV4_ADDRESS &&
3011 sa->sa_family == AF_INET) {
3012 /* get the entire IPv4 address param */
3013 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m,
3014 offset, sizeof(struct sctp_ipv4addr_param),
3015 (uint8_t *) & addr_store);
3016 if (plen != sizeof(struct sctp_ipv4addr_param) ||
3017 (ph == NULL) ||
3018 (a4p == NULL)) {
3019 return (0);
3020 }
3021 sin = (struct sockaddr_in *)sa;
3022 if (sin->sin_addr.s_addr == a4p->addr) {
3023 /* found it */
3024 return (1);
3025 }
3026 }
3027 /* get next parameter */
3028 offset += SCTP_SIZE32(plen);
3029 if (offset + sizeof(struct sctp_paramhdr) > length)
3030 return (0);
3031 ph = (struct sctp_paramhdr *)
3032 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
3033 (uint8_t *) & tmp_param);
3034 } /* while */
3035 /* not found! */
3036 return (0);
3037 }
3038
3039 /*
3040 * makes sure that the current endpoint local addr list is consistent with
3041 * the new association (eg. subset bound, asconf allowed) adds addresses as
3042 * necessary
3043 */
3044 static void
3045 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3046 int length, struct sockaddr *init_addr)
3047 {
3048 struct sctp_laddr *laddr;
3049
3050 /* go through the endpoint list */
3051 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3052 /* be paranoid and validate the laddr */
3053 if (laddr->ifa == NULL) {
3054 SCTPDBG(SCTP_DEBUG_ASCONF1,
3055 "check_addr_list_ep: laddr->ifa is NULL");
3056 continue;
3057 }
3058 if (laddr->ifa == NULL) {
3059 SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL");
3060 continue;
3061 }
3062 /* do i have it implicitly? */
3063 if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) {
3064 continue;
3065 }
3066 /* check to see if in the init-ack */
3067 if (!sctp_addr_in_initack(stcb, m, offset, length,
3068 &laddr->ifa->address.sa)) {
3069 /* try to add it */
3070 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa,
3071 SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED);
3072 }
3073 }
3074 }
3075
3076 /*
3077 * makes sure that the current kernel address list is consistent with the new
3078 * association (with all addrs bound) adds addresses as necessary
3079 */
3080 static void
3081 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3082 int length, struct sockaddr *init_addr,
3083 uint16_t local_scope, uint16_t site_scope,
3084 uint16_t ipv4_scope, uint16_t loopback_scope)
3085 {
3086 struct sctp_vrf *vrf = NULL;
3087 struct sctp_ifn *sctp_ifn;
3088 struct sctp_ifa *sctp_ifa;
3089 uint32_t vrf_id;
3090
3091 if (stcb) {
3092 vrf_id = stcb->asoc.vrf_id;
3093 } else {
3094 return;
3095 }
3096 SCTP_IPI_ADDR_RLOCK();
3097 vrf = sctp_find_vrf(vrf_id);
3098 if (vrf == NULL) {
3099 SCTP_IPI_ADDR_RUNLOCK();
3100 return;
3101 }
3102 /* go through all our known interfaces */
3103 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3104 if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3105 /* skip loopback interface */
3106 continue;
3107 }
3108 /* go through each interface address */
3109 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3110 /* do i have it implicitly? */
3111 if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) {
3112 continue;
3113 }
3114 /* check to see if in the init-ack */
3115 if (!sctp_addr_in_initack(stcb, m, offset, length,
3116 &sctp_ifa->address.sa)) {
3117 /* try to add it */
3118 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb,
3119 sctp_ifa, SCTP_ADD_IP_ADDRESS,
3120 SCTP_ADDR_LOCKED);
3121 }
3122 } /* end foreach ifa */
3123 } /* end foreach ifn */
3124 SCTP_IPI_ADDR_RUNLOCK();
3125 }
3126
3127 /*
3128 * validates an init-ack chunk (from a cookie-echo) with current addresses
3129 * adds addresses from the init-ack into our local address list, if needed
3130 * queues asconf adds/deletes addresses as needed and makes appropriate list
3131 * changes for source address selection m, offset: points to the start of the
3132 * address list in an init-ack chunk length: total length of the address
3133 * params only init_addr: address where my INIT-ACK was sent from
3134 */
3135 void
3136 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3137 int length, struct sockaddr *init_addr,
3138 uint16_t local_scope, uint16_t site_scope,
3139 uint16_t ipv4_scope, uint16_t loopback_scope)
3140 {
3141 /* process the local addresses in the initack */
3142 sctp_process_initack_addresses(stcb, m, offset, length);
3143
3144 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3145 /* bound all case */
3146 sctp_check_address_list_all(stcb, m, offset, length, init_addr,
3147 local_scope, site_scope, ipv4_scope, loopback_scope);
3148 } else {
3149 /* subset bound case */
3150 if (sctp_is_feature_on(stcb->sctp_ep,
3151 SCTP_PCB_FLAGS_DO_ASCONF)) {
3152 /* asconf's allowed */
3153 sctp_check_address_list_ep(stcb, m, offset, length,
3154 init_addr);
3155 }
3156 /* else, no asconfs allowed, so what we sent is what we get */
3157 }
3158 }
3159
3160 /*
3161 * sctp_bindx() support
3162 */
3163 uint32_t
3164 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa,
3165 uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap)
3166 {
3167 struct sctp_ifa *ifa;
3168
3169 if (sa->sa_len == 0) {
3170 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3171 return (EINVAL);
3172 }
3173 if (sctp_ifap) {
3174 ifa = sctp_ifap;
3175 } else if (type == SCTP_ADD_IP_ADDRESS) {
3176 /* For an add the address MUST be on the system */
3177 ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
3178 } else if (type == SCTP_DEL_IP_ADDRESS) {
3179 /* For a delete we need to find it in the inp */
3180 ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED);
3181 } else {
3182 ifa = NULL;
3183 }
3184 if (ifa != NULL) {
3185 if (type == SCTP_ADD_IP_ADDRESS) {
3186 sctp_add_local_addr_ep(inp, ifa, type);
3187 } else if (type == SCTP_DEL_IP_ADDRESS) {
3188 struct sctp_laddr *laddr;
3189
3190 if (inp->laddr_count < 2) {
3191 /* can't delete the last local address */
3192 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL);
3193 return (EINVAL);
3194 }
3195 LIST_FOREACH(laddr, &inp->sctp_addr_list,
3196 sctp_nxt_addr) {
3197 if (ifa == laddr->ifa) {
3198 /* Mark in the delete */
3199 laddr->action = type;
3200 }
3201 }
3202 }
3203 if (!LIST_EMPTY(&inp->sctp_asoc_list)) {
3204 /*
3205 * There is no need to start the iterator if the inp
3206 * has no associations.
3207 */
3208 struct sctp_asconf_iterator *asc;
3209 struct sctp_laddr *wi;
3210
3211 SCTP_MALLOC(asc, struct sctp_asconf_iterator *,
3212 sizeof(struct sctp_asconf_iterator),
3213 SCTP_M_ASC_IT);
3214 if (asc == NULL) {
3215 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3216 return (ENOMEM);
3217 }
3218 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
3219 if (wi == NULL) {
3220 SCTP_FREE(asc, SCTP_M_ASC_IT);
3221 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM);
3222 return (ENOMEM);
3223 }
3224 LIST_INIT(&asc->list_of_work);
3225 asc->cnt = 1;
3226 SCTP_INCR_LADDR_COUNT();
3227 wi->ifa = ifa;
3228 wi->action = type;
3229 atomic_add_int(&ifa->refcount, 1);
3230 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr);
3231 (void)sctp_initiate_iterator(sctp_asconf_iterator_ep,
3232 sctp_asconf_iterator_stcb,
3233 sctp_asconf_iterator_ep_end,
3234 SCTP_PCB_ANY_FLAGS,
3235 SCTP_PCB_ANY_FEATURES,
3236 SCTP_ASOC_ANY_STATE,
3237 (void *)asc, 0,
3238 sctp_asconf_iterator_end, inp, 0);
3239 }
3240 return (0);
3241 } else {
3242 /* invalid address! */
3243 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL);
3244 return (EADDRNOTAVAIL);
3245 }
3246 }
3247
3248 void
3249 sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb,
3250 struct sctp_nets *net)
3251 {
3252 struct sctp_asconf_addr *aa;
3253 struct sctp_ifa *sctp_ifap;
3254 struct sctp_asconf_tag_param *vtag;
3255 struct sockaddr_in *to;
3256
3257 #ifdef INET6
3258 struct sockaddr_in6 *to6;
3259
3260 #endif
3261 if (net == NULL) {
3262 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n");
3263 return;
3264 }
3265 if (stcb == NULL) {
3266 SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n");
3267 return;
3268 }
3269 /*
3270 * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) -
3271 * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr)
3272 */
3273 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3274 SCTP_M_ASC_ADDR);
3275 if (aa == NULL) {
3276 /* didn't get memory */
3277 SCTPDBG(SCTP_DEBUG_ASCONF1,
3278 "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3279 return;
3280 }
3281 aa->special_del = 0;
3282 /* fill in asconf address parameter fields */
3283 /* top level elements are "networked" during send */
3284 aa->ifa = NULL;
3285 aa->sent = 0; /* clear sent flag */
3286 vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph;
3287 vtag->aph.ph.param_type = SCTP_NAT_VTAGS;
3288 vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param);
3289 vtag->local_vtag = htonl(stcb->asoc.my_vtag);
3290 vtag->remote_vtag = htonl(stcb->asoc.peer_vtag);
3291 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3292
3293 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3294 SCTP_M_ASC_ADDR);
3295 if (aa == NULL) {
3296 /* didn't get memory */
3297 SCTPDBG(SCTP_DEBUG_ASCONF1,
3298 "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3299 return;
3300 }
3301 memset(aa, 0, sizeof(struct sctp_asconf_addr));
3302 /* fill in asconf address parameter fields */
3303 /* ADD(0.0.0.0) */
3304 if (net->ro._l_addr.sa.sa_family == AF_INET) {
3305 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3306 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3307 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3308 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3309 /* No need to add an address, we are using 0.0.0.0 */
3310 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3311 }
3312 #ifdef INET6
3313 else if (net->ro._l_addr.sa.sa_family == AF_INET6) {
3314 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3315 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3316 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3317 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3318 /* No need to add an address, we are using 0.0.0.0 */
3319 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3320 }
3321 #endif /* INET6 */
3322 SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa),
3323 SCTP_M_ASC_ADDR);
3324 if (aa == NULL) {
3325 /* didn't get memory */
3326 SCTPDBG(SCTP_DEBUG_ASCONF1,
3327 "sctp_asconf_send_nat_state_update: failed to get memory!\n");
3328 return;
3329 }
3330 memset(aa, 0, sizeof(struct sctp_asconf_addr));
3331 /* fill in asconf address parameter fields */
3332 /* ADD(0.0.0.0) */
3333 if (net->ro._l_addr.sa.sa_family == AF_INET) {
3334 aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS;
3335 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param);
3336 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
3337 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param);
3338 /* No need to add an address, we are using 0.0.0.0 */
3339 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3340 }
3341 #ifdef INET6
3342 else if (net->ro._l_addr.sa.sa_family == AF_INET6) {
3343 aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS;
3344 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param);
3345 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
3346 aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param);
3347 /* No need to add an address, we are using 0.0.0.0 */
3348 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
3349 }
3350 #endif /* INET6 */
3351 /* Now we must hunt the addresses and add all global addresses */
3352 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3353 struct sctp_vrf *vrf = NULL;
3354 struct sctp_ifn *sctp_ifnp;
3355 uint32_t vrf_id;
3356
3357 vrf_id = stcb->sctp_ep->def_vrf_id;
3358 vrf = sctp_find_vrf(vrf_id);
3359 if (vrf == NULL) {
3360 goto skip_rest;
3361 }
3362 SCTP_IPI_ADDR_RLOCK();
3363 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
3364 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
3365 if (sctp_ifap->address.sa.sa_family == AF_INET) {
3366 to = &sctp_ifap->address.sin;
3367
3368 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3369 continue;
3370 }
3371 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3372 continue;
3373 }
3374 }
3375 #ifdef INET6
3376 else if (sctp_ifap->address.sa.sa_family == AF_INET6) {
3377 to6 = &sctp_ifap->address.sin6;
3378 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3379 continue;
3380 }
3381 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3382 continue;
3383 }
3384 }
3385 #endif
3386 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3387 }
3388 }
3389 SCTP_IPI_ADDR_RUNLOCK();
3390 } else {
3391 struct sctp_laddr *laddr;
3392
3393 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
3394 if (laddr->ifa == NULL) {
3395 continue;
3396 }
3397 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
3398 /*
3399 * Address being deleted by the system, dont
3400 * list.
3401 */
3402 continue;
3403 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
3404 /*
3405 * Address being deleted on this ep don't
3406 * list.
3407 */
3408 continue;
3409 }
3410 sctp_ifap = laddr->ifa;
3411 if (sctp_ifap->address.sa.sa_family == AF_INET) {
3412 to = &sctp_ifap->address.sin;
3413
3414 if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) {
3415 continue;
3416 }
3417 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3418 continue;
3419 }
3420 }
3421 #ifdef INET6
3422 else if (sctp_ifap->address.sa.sa_family == AF_INET6) {
3423 to6 = &sctp_ifap->address.sin6;
3424 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
3425 continue;
3426 }
3427 if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3428 continue;
3429 }
3430 }
3431 #endif
3432 sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS);
3433 }
3434 }
3435 skip_rest:
3436 /* Now we must send the asconf into the queue */
3437 sctp_send_asconf(stcb, net, 0);
3438 }
Cache object: 4590d2d73bc434404b3afc6b6dcdcee1
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