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Fix some mis-usages of NULL.
[dragonfly.git] / sys / netinet / sctp_asconf.c
blobf02ffa79a13cfa6bb8ea9f28b17dedb76bc3cfc0
1 /* $KAME: sctp_asconf.c,v 1.23 2004/08/17 06:28:01 t-momose Exp $ */
2 /* $DragonFly: src/sys/netinet/sctp_asconf.c,v 1.6 2007/08/27 16:15:42 hasso Exp $ */
3
4 /*
5 * Copyright (c) 2001, 2002, 2003, 2004 Cisco Systems, Inc.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY CISCO SYSTEMS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL CISCO SYSTEMS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32 #if !(defined(__OpenBSD__) || defined(__APPLE__))
33 #include "opt_ipsec.h"
34 #endif
35 #if defined(__FreeBSD__)
36 #include "opt_compat.h"
37 #include "opt_inet6.h"
38 #include "opt_inet.h"
39 #endif
40 #if defined(__NetBSD__)
41 #include "opt_inet.h"
42 #endif
43
44 #ifdef __APPLE__
45 #include <sctp.h>
46 #elif !defined(__OpenBSD__)
47 #include "opt_sctp.h"
48 #endif
49
50 #include <sys/param.h>
51 #include <sys/systm.h>
52 #include <sys/malloc.h>
53 #include <sys/mbuf.h>
54 #include <sys/socket.h>
55 #include <sys/socketvar.h>
56 #include <sys/kernel.h>
57 #include <sys/sysctl.h>
58 #include <sys/thread2.h>
59
60 #include <net/if.h>
61 #include <net/if_types.h>
62 #include <net/route.h>
63
64 #include <netinet/in.h>
65 #include <netinet/in_systm.h>
66 #include <netinet/ip.h>
67 #include <netinet/in_pcb.h>
68 #include <netinet/in_var.h>
69 #include <netinet/ip_var.h>
70
71 #ifdef INET6
72 #include <netinet/ip6.h>
73 #include <netinet6/ip6_var.h>
74 #if defined(__FreeBSD__) || (__NetBSD__)
75 #include <netinet6/in6_pcb.h>
76 #elif defined(__OpenBSD__)
77 #include <netinet/in_pcb.h>
78 #endif
79 #include <netinet/icmp6.h>
80 #include <netinet6/nd6.h>
81 #endif /* INET6 */
82
83 #include <netinet/in_pcb.h>
84
85 #include <netinet/sctp_var.h>
86 #include <netinet/sctp_pcb.h>
87 #include <netinet/sctp_header.h>
88 #include <netinet/sctputil.h>
89 #include <netinet/sctp_output.h>
90 #include <netinet/sctp_asconf.h>
91
92 /*
93 * debug flags:
94 * SCTP_DEBUG_ASCONF1: protocol info, general info and errors
95 * SCTP_DEBUG_ASCONF2: detailed info
96 */
97 #ifdef SCTP_DEBUG
98 extern u_int32_t sctp_debug_on;
99
100 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__)
101 #define strlcpy strncpy
102 #endif
103 #endif /* SCTP_DEBUG */
104
105 /*
106 * draft-ietf-tsvwg-addip-sctp
107 *
108 * Address management only currently supported
109 * For the bound all case:
110 * the asoc local addr list is always a "DO NOT USE" list
111 * For the subset bound case:
112 * If ASCONFs are allowed:
113 * the endpoint local addr list is the usable address list
114 * the asoc local addr list is the "DO NOT USE" list
115 * If ASCONFs are not allowed:
116 * the endpoint local addr list is the default usable list
117 * the asoc local addr list is the usable address list
118 *
119 * An ASCONF parameter queue exists per asoc which holds the pending
120 * address operations. Lists are updated upon receipt of ASCONF-ACK.
121 *
122 * Deleted addresses are always immediately removed from the lists as
123 * they will (shortly) no longer exist in the kernel. We send ASCONFs
124 * as a courtesy, only if allowed.
125 */
126
127 /*
128 * ASCONF parameter processing
129 * response_required: set if a reply is required (eg. SUCCESS_REPORT)
130 * returns a mbuf to an "error" response parameter or NULL/"success" if ok
131 * FIX: allocating this many mbufs on the fly is pretty inefficient...
132 */
133
134 static struct mbuf *
135 sctp_asconf_success_response(uint32_t id)
136 {
137 struct mbuf *m_reply = NULL;
138 struct sctp_asconf_paramhdr *aph;
139
140 MGET(m_reply, MB_DONTWAIT, MT_DATA);
141 if (m_reply == NULL) {
142 #ifdef SCTP_DEBUG
143 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
144 kprintf("asconf_success_response: couldn't get mbuf!\n");
145 }
146 #endif /* SCTP_DEBUG */
147 return NULL;
148 }
149 aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
150 aph->correlation_id = id;
151 aph->ph.param_type = htons(SCTP_SUCCESS_REPORT);
152 aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr);
153 m_reply->m_len = aph->ph.param_length;
154 aph->ph.param_length = htons(aph->ph.param_length);
155
156 return m_reply;
157 }
158
159 static struct mbuf *
160 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t *error_tlv,
161 uint16_t tlv_length)
162 {
163 struct mbuf *m_reply = NULL;
164 struct sctp_asconf_paramhdr *aph;
165 struct sctp_error_cause *error;
166 uint8_t *tlv;
167
168 MGET(m_reply, MB_DONTWAIT, MT_DATA);
169 if (m_reply == NULL) {
170 #ifdef SCTP_DEBUG
171 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
172 kprintf("asconf_error_response: couldn't get mbuf!\n");
173 }
174 #endif /* SCTP_DEBUG */
175 return NULL;
176 }
177 aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
178 error = (struct sctp_error_cause *)(aph + 1);
179
180 aph->correlation_id = id;
181 aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND);
182 error->code = htons(cause);
183 error->length = tlv_length + sizeof(struct sctp_error_cause);
184 aph->ph.param_length = error->length +
185 sizeof(struct sctp_asconf_paramhdr);
186
187 if (aph->ph.param_length > MLEN) {
188 #ifdef SCTP_DEBUG
189 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
190 kprintf("asconf_error_response: tlv_length (%xh) too big\n",
191 tlv_length);
192 }
193 #endif /* SCTP_DEBUG */
194 sctp_m_freem(m_reply); /* discard */
195 return NULL;
196 }
197
198 if (error_tlv != NULL) {
199 tlv = (uint8_t *)(error + 1);
200 memcpy(tlv, error_tlv, tlv_length);
201 }
202
203 m_reply->m_len = aph->ph.param_length;
204 error->length = htons(error->length);
205 aph->ph.param_length = htons(aph->ph.param_length);
206
207 return m_reply;
208 }
209
210 static struct mbuf *
211 sctp_process_asconf_add_ip(struct sctp_asconf_paramhdr *aph,
212 struct sctp_tcb *stcb, int response_required)
213 {
214 struct mbuf *m_reply = NULL;
215 struct sockaddr_storage sa_store;
216 struct sctp_ipv4addr_param *v4addr;
217 uint16_t param_type, param_length, aparam_length;
218 struct sockaddr *sa;
219 struct sockaddr_in *sin;
220 #ifdef INET6
221 struct sockaddr_in6 *sin6;
222 struct sctp_ipv6addr_param *v6addr;
223 #endif /* INET6 */
224
225 aparam_length = ntohs(aph->ph.param_length);
226 v4addr = (struct sctp_ipv4addr_param *)(aph + 1);
227 #ifdef INET6
228 v6addr = (struct sctp_ipv6addr_param *)(aph + 1);
229 #endif /* INET6 */
230 param_type = ntohs(v4addr->ph.param_type);
231 param_length = ntohs(v4addr->ph.param_length);
232
233 sa = (struct sockaddr *)&sa_store;
234 switch (param_type) {
235 case SCTP_IPV4_ADDRESS:
236 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
237 /* invalid param size */
238 return NULL;
239 }
240 sin = (struct sockaddr_in *)&sa_store;
241 bzero(sin, sizeof(*sin));
242 sin->sin_family = AF_INET;
243 sin->sin_len = sizeof(struct sockaddr_in);
244 sin->sin_port = stcb->rport;
245 sin->sin_addr.s_addr = v4addr->addr;
246 #ifdef SCTP_DEBUG
247 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
248 kprintf("process_asconf_add_ip: adding ");
249 sctp_print_address(sa);
250 }
251 #endif /* SCTP_DEBUG */
252 break;
253 case SCTP_IPV6_ADDRESS:
254 #ifdef INET6
255 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
256 /* invalid param size */
257 return NULL;
258 }
259 sin6 = (struct sockaddr_in6 *)&sa_store;
260 bzero(sin6, sizeof(*sin6));
261 sin6->sin6_family = AF_INET6;
262 sin6->sin6_len = sizeof(struct sockaddr_in6);
263 sin6->sin6_port = stcb->rport;
264 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
265 sizeof(struct in6_addr));
266 #ifdef SCTP_DEBUG
267 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
268 kprintf("process_asconf_add_ip: adding ");
269 sctp_print_address(sa);
270 }
271 #endif /* SCTP_DEBUG */
272 #else
273 /* IPv6 not enabled! */
274 /* FIX ME: currently sends back an invalid param error */
275 m_reply = sctp_asconf_error_response(aph->correlation_id,
276 SCTP_ERROR_INVALID_PARAM, (uint8_t *)aph, aparam_length);
277 #ifdef SCTP_DEBUG
278 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
279 kprintf("process_asconf_add_ip: v6 disabled- skipping ");
280 sctp_print_address(sa);
281 }
282 #endif /* SCTP_DEBUG */
283 return m_reply;
284 #endif /* INET6 */
285 break;
286 default:
287 m_reply = sctp_asconf_error_response(aph->correlation_id,
288 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph,
289 aparam_length);
290 return m_reply;
291 } /* end switch */
292
293 /* add the address */
294 if (sctp_add_remote_addr(stcb, sa, 0, 6) != 0) {
295 #ifdef SCTP_DEBUG
296 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
297 kprintf("process_asconf_add_ip: error adding address\n");
298 }
299 #endif /* SCTP_DEBUG */
300 m_reply = sctp_asconf_error_response(aph->correlation_id,
301 SCTP_ERROR_RESOURCE_SHORTAGE, (uint8_t *)aph,
302 aparam_length);
303 } else {
304 /* notify upper layer */
305 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa);
306 if (response_required) {
307 m_reply =
308 sctp_asconf_success_response(aph->correlation_id);
309 }
310 }
311
312 return m_reply;
313 }
314
315 static struct mbuf *
316 sctp_process_asconf_delete_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph,
317 struct sctp_tcb *stcb, int response_required)
318 {
319 struct mbuf *m_reply = NULL;
320 struct sockaddr_storage sa_store, sa_source;
321 struct sctp_ipv4addr_param *v4addr;
322 uint16_t param_type, param_length, aparam_length;
323 struct sockaddr *sa;
324 struct sockaddr_in *sin;
325 struct ip *iph;
326 int result;
327 #ifdef INET6
328 struct sockaddr_in6 *sin6;
329 struct sctp_ipv6addr_param *v6addr;
330 #endif /* INET6 */
331
332 aparam_length = ntohs(aph->ph.param_length);
333 v4addr = (struct sctp_ipv4addr_param *)(aph + 1);
334 #ifdef INET6
335 v6addr = (struct sctp_ipv6addr_param *)(aph + 1);
336 #endif /* INET6 */
337 param_type = ntohs(v4addr->ph.param_type);
338 param_length = ntohs(v4addr->ph.param_length);
339
340 /* get the source IP address for deletion check */
341 iph = mtod(m, struct ip *);
342 if (iph->ip_v == IPVERSION) {
343 /* IPv4 source */
344 sin = (struct sockaddr_in *)&sa_source;
345 bzero(sin, sizeof(*sin));
346 sin->sin_family = AF_INET;
347 sin->sin_len = sizeof(struct sockaddr_in);
348 sin->sin_port = stcb->rport;
349 sin->sin_addr.s_addr = iph->ip_src.s_addr;
350 }
351 #ifdef INET6
352 else if (iph->ip_v == (IPV6_VERSION >> 4)) {
353 /* IPv6 source */
354 struct ip6_hdr *ip6;
355
356 sin6 = (struct sockaddr_in6 *)&sa_source;
357 bzero(sin6, sizeof(*sin6));
358 sin6->sin6_family = AF_INET6;
359 sin6->sin6_len = sizeof(struct sockaddr_in6);
360 sin6->sin6_port = stcb->rport;
361 ip6 = mtod(m, struct ip6_hdr *);
362 sin6->sin6_addr = ip6->ip6_src;
363 }
364 #endif /* INET6 */
365 else
366 return NULL;
367
368 sa = (struct sockaddr *)&sa_store;
369 switch (param_type) {
370 case SCTP_IPV4_ADDRESS:
371 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
372 /* invalid param size */
373 return NULL;
374 }
375 sin = (struct sockaddr_in *)&sa_store;
376 bzero(sin, sizeof(*sin));
377 sin->sin_family = AF_INET;
378 sin->sin_len = sizeof(struct sockaddr_in);
379 sin->sin_port = stcb->rport;
380 sin->sin_addr.s_addr = v4addr->addr;
381 #ifdef SCTP_DEBUG
382 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
383 kprintf("process_asconf_delete_ip: deleting ");
384 sctp_print_address(sa);
385 }
386 #endif /* SCTP_DEBUG */
387 break;
388 case SCTP_IPV6_ADDRESS:
389 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
390 /* invalid param size */
391 return NULL;
392 }
393 #ifdef INET6
394 sin6 = (struct sockaddr_in6 *)&sa_store;
395 bzero(sin6, sizeof(*sin6));
396 sin6->sin6_family = AF_INET6;
397 sin6->sin6_len = sizeof(struct sockaddr_in6);
398 sin6->sin6_port = stcb->rport;
399 memcpy(&sin6->sin6_addr, v6addr->addr,
400 sizeof(struct in6_addr));
401 #ifdef SCTP_DEBUG
402 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
403 kprintf("process_asconf_delete_ip: deleting ");
404 sctp_print_address(sa);
405 }
406 #endif /* SCTP_DEBUG */
407 #else
408 /* IPv6 not enabled! No "action" needed; just ack it */
409 #ifdef SCTP_DEBUG
410 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
411 kprintf("process_asconf_delete_ip: v6 disabled- ignoring: ");
412 sctp_print_address(sa);
413 }
414 #endif /* SCTP_DEBUG */
415 /* just respond with a "success" ASCONF-ACK */
416 return NULL;
417 #endif /* INET6 */
418 break;
419 default:
420 m_reply = sctp_asconf_error_response(aph->correlation_id,
421 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph,
422 aparam_length);
423 return m_reply;
424 } /* end switch */
425
426 /* make sure the source address is not being deleted */
427 if ((memcmp(sa, &sa_source, sizeof(struct sockaddr_in)) == 0)
428 #ifdef INET6
429 || (memcmp(sa, &sa_source, sizeof(struct sockaddr_in6)) == 0)
430 #endif /* INET6 */
431 ) {
432 /* trying to delete the source address! */
433 #ifdef SCTP_DEBUG
434 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
435 kprintf("process_asconf_delete_ip: tried to delete source addr\n");
436 }
437 #endif /* SCTP_DEBUG */
438 m_reply = sctp_asconf_error_response(aph->correlation_id,
439 SCTP_ERROR_DELETE_SOURCE_ADDR, (uint8_t *)aph,
440 aparam_length);
441 return m_reply;
442 }
443
444 /* delete the address */
445 result = sctp_del_remote_addr(stcb, sa);
446 /*
447 * note if result == -2, the address doesn't exist in the asoc
448 * but since it's being deleted anyways, we just ack the delete
449 * -- but this probably means something has already gone awry
450 */
451 if (result == -1) {
452 /* only one address in the asoc */
453 #ifdef SCTP_DEBUG
454 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
455 kprintf("process_asconf_delete_ip: tried to delete last IP addr!\n");
456 }
457 #endif /* SCTP_DEBUG */
458 m_reply = sctp_asconf_error_response(aph->correlation_id,
459 SCTP_ERROR_DELETE_LAST_ADDR, (uint8_t *)aph,
460 aparam_length);
461 } else {
462 /* notify upper layer */
463 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa);
464 }
465
466 if (response_required) {
467 m_reply = sctp_asconf_success_response(aph->correlation_id);
468 }
469 return m_reply;
470 }
471
472 static struct mbuf *
473 sctp_process_asconf_set_primary(struct sctp_asconf_paramhdr *aph,
474 struct sctp_tcb *stcb, int response_required)
475 {
476 struct mbuf *m_reply = NULL;
477 struct sockaddr_storage sa_store;
478 struct sctp_ipv4addr_param *v4addr;
479 uint16_t param_type, param_length, aparam_length;
480 struct sockaddr *sa;
481 struct sockaddr_in *sin;
482 #ifdef INET6
483 struct sockaddr_in6 *sin6;
484 struct sctp_ipv6addr_param *v6addr;
485 #endif /* INET6 */
486
487 aparam_length = ntohs(aph->ph.param_length);
488 v4addr = (struct sctp_ipv4addr_param *)(aph + 1);
489 #ifdef INET6
490 v6addr = (struct sctp_ipv6addr_param *)(aph + 1);
491 #endif /* INET6 */
492 param_type = ntohs(v4addr->ph.param_type);
493 param_length = ntohs(v4addr->ph.param_length);
494
495 sa = (struct sockaddr *)&sa_store;
496 switch (param_type) {
497 case SCTP_IPV4_ADDRESS:
498 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
499 /* invalid param size */
500 return NULL;
501 }
502 sin = (struct sockaddr_in *)&sa_store;
503 bzero(sin, sizeof(*sin));
504 sin->sin_family = AF_INET;
505 sin->sin_len = sizeof(struct sockaddr_in);
506 sin->sin_addr.s_addr = v4addr->addr;
507 #ifdef SCTP_DEBUG
508 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
509 kprintf("process_asconf_set_primary: ");
510 sctp_print_address(sa);
511 }
512 #endif /* SCTP_DEBUG */
513 break;
514 case SCTP_IPV6_ADDRESS:
515 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
516 /* invalid param size */
517 return NULL;
518 }
519 #ifdef INET6
520 sin6 = (struct sockaddr_in6 *)&sa_store;
521 bzero(sin6, sizeof(*sin6));
522 sin6->sin6_family = AF_INET6;
523 sin6->sin6_len = sizeof(struct sockaddr_in6);
524 memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr,
525 sizeof(struct in6_addr));
526 #ifdef SCTP_DEBUG
527 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
528 kprintf("process_asconf_set_primary: ");
529 sctp_print_address(sa);
530 }
531 #endif /* SCTP_DEBUG */
532 #else
533 /* IPv6 not enabled! No "action" needed; just ack it */
534 #ifdef SCTP_DEBUG
535 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
536 kprintf("process_asconf_set_primary: v6 disabled- ignoring: ");
537 sctp_print_address(sa);
538 }
539 #endif /* SCTP_DEBUG */
540 /* just respond with a "success" ASCONF-ACK */
541 return NULL;
542 #endif /* INET6 */
543 break;
544 default:
545 m_reply = sctp_asconf_error_response(aph->correlation_id,
546 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph,
547 aparam_length);
548 return m_reply;
549 } /* end switch */
550
551 /* set the primary address */
552 if (sctp_set_primary_addr(stcb, sa, NULL) == 0) {
553 #ifdef SCTP_DEBUG
554 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
555 kprintf("process_asconf_set_primary: primary address set\n");
556 }
557 #endif /* SCTP_DEBUG */
558 /* notify upper layer */
559 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa);
560
561 if (response_required) {
562 m_reply = sctp_asconf_success_response(aph->correlation_id);
563 }
564 } else {
565 /* couldn't set the requested primary address! */
566 #ifdef SCTP_DEBUG
567 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
568 kprintf("process_asconf_set_primary: set primary failed!\n");
569 }
570 #endif /* SCTP_DEBUG */
571 /* must have been an invalid address, so report */
572 m_reply = sctp_asconf_error_response(aph->correlation_id,
573 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph,
574 aparam_length);
575 }
576
577 return m_reply;
578 }
579
580 /*
581 * handles an ASCONF chunk
582 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK
583 */
584 void
585 sctp_handle_asconf(struct mbuf *m, unsigned int offset, struct sctp_asconf_chunk *cp,
586 struct sctp_tcb *stcb, struct sctp_nets *net)
587 {
588 struct sctp_association *asoc;
589 uint32_t serial_num;
590 struct mbuf *m_ack, *m_result, *m_tail;
591 struct sctp_asconf_ack_chunk *ack_cp;
592 struct sctp_asconf_paramhdr *aph, *ack_aph;
593 struct sctp_ipv6addr_param *p_addr;
594 unsigned int asconf_limit;
595 int error = 0; /* did an error occur? */
596 /* asconf param buffer */
597 static u_int8_t aparam_buf[DEFAULT_PARAM_BUFFER];
598
599 /* verify minimum length */
600 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) {
601 #ifdef SCTP_DEBUG
602 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
603 kprintf("handle_asconf: chunk too small = %xh\n",
604 ntohs(cp->ch.chunk_length));
605 }
606 #endif /* SCTP_DEBUG */
607 return;
608 }
609
610 asoc = &stcb->asoc;
611 serial_num = ntohl(cp->serial_number);
612
613 if (serial_num == asoc->asconf_seq_in) {
614 /* got a duplicate ASCONF */
615 #ifdef SCTP_DEBUG
616 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
617 kprintf("handle_asconf: got duplicate serial number = %xh\n",
618 serial_num);
619 }
620 #endif /* SCTP_DEBUG */
621 /* resend last ASCONF-ACK... */
622 sctp_send_asconf_ack(stcb, 1);
623 return;
624 } else if (serial_num != (asoc->asconf_seq_in + 1)) {
625 #ifdef SCTP_DEBUG
626 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
627 kprintf("handle_asconf: incorrect serial number = %xh (expected next = %xh)\n",
628 serial_num, asoc->asconf_seq_in+1);
629 }
630 #endif /* SCTP_DEBUG */
631 return;
632 }
633
634 /* it's the expected "next" sequence number, so process it */
635 asoc->asconf_seq_in = serial_num; /* update sequence */
636 /* get length of all the param's in the ASCONF */
637 asconf_limit = offset + ntohs(cp->ch.chunk_length);
638 #ifdef SCTP_DEBUG
639 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
640 kprintf("handle_asconf: asconf_limit=%u, sequence=%xh\n",
641 asconf_limit, serial_num);
642 }
643 #endif /* SCTP_DEBUG */
644 if (asoc->last_asconf_ack_sent != NULL) {
645 /* free last ASCONF-ACK message sent */
646 sctp_m_freem(asoc->last_asconf_ack_sent);
647 asoc->last_asconf_ack_sent = NULL;
648 }
649 MGETHDR(m_ack, MB_DONTWAIT, MT_DATA);
650 if (m_ack == NULL) {
651 #ifdef SCTP_DEBUG
652 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
653 kprintf("handle_asconf: couldn't get mbuf!\n");
654 }
655 #endif /* SCTP_DEBUG */
656 return;
657 }
658 m_tail = m_ack; /* current reply chain's tail */
659
660 /* fill in ASCONF-ACK header */
661 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *);
662 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK;
663 ack_cp->ch.chunk_flags = 0;
664 ack_cp->serial_number = htonl(serial_num);
665 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */
666 m_ack->m_len = sizeof(struct sctp_asconf_ack_chunk);
667 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk);
668 m_ack->m_pkthdr.len = sizeof(struct sctp_asconf_ack_chunk);
669
670 /* skip the lookup address parameter */
671 offset += sizeof(struct sctp_asconf_chunk);
672 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *)&aparam_buf);
673 if (p_addr == NULL) {
674 #ifdef SCTP_DEBUG
675 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
676 kprintf("handle_asconf: couldn't get lookup addr!\n");
677 }
678 #endif /* SCTP_DEBUG */
679
680 /* respond with a missing/invalid mandatory parameter error */
681 return;
682 }
683 /* param_length is already validated in process_control... */
684 offset += ntohs(p_addr->ph.param_length); /* skip lookup addr */
685
686 /* get pointer to first asconf param in ASCONF */
687 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *)&aparam_buf);
688 /* get pointer to first asconf param in ASCONF-ACK */
689 if (aph == NULL) {
690 kprintf("Gak in asconf\n");
691 return;
692 }
693 ack_aph = (struct sctp_asconf_paramhdr *)(mtod(m_ack, caddr_t) + sizeof(struct sctp_asconf_ack_chunk));
694 if (ack_aph == NULL) {
695 kprintf("Gak in asconf2\n");
696 return;
697 }
698
699 /* process through all parameters */
700 while (aph != NULL) {
701 unsigned int param_length, param_type;
702
703 param_type = ntohs(aph->ph.param_type);
704 param_length = ntohs(aph->ph.param_length);
705 if (offset + param_length > asconf_limit) {
706 /* parameter goes beyond end of chunk! */
707 sctp_m_freem(m_ack);
708 return;
709 }
710 m_result = NULL;
711
712 if (param_length > sizeof(aparam_buf)) {
713 #ifdef SCTP_DEBUG
714 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
715 kprintf("handle_asconf: param length (%u) larger than buffer size!\n", param_length);
716 }
717 #endif /* SCTP_DEBUG */
718 sctp_m_freem(m_ack);
719 return;
720 }
721 if (param_length <= sizeof(struct sctp_paramhdr)) {
722 #ifdef SCTP_DEBUG
723 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
724 kprintf("handle_asconf: param length (%u) too short\n", param_length);
725 }
726 #endif /* SCTP_DEBUG */
727 sctp_m_freem(m_ack);
728 }
729
730 /* get the entire parameter */
731 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
732 if (aph == NULL) {
733 kprintf("Gag\n");
734 sctp_m_freem(m_ack);
735 return;
736 }
737 switch (param_type) {
738 case SCTP_ADD_IP_ADDRESS:
739 asoc->peer_supports_asconf = 1;
740 m_result = sctp_process_asconf_add_ip(aph, stcb, error);
741 break;
742 case SCTP_DEL_IP_ADDRESS:
743 asoc->peer_supports_asconf = 1;
744 m_result = sctp_process_asconf_delete_ip(m, aph, stcb,
745 error);
746 break;
747 case SCTP_ERROR_CAUSE_IND:
748 /* not valid in an ASCONF chunk */
749 break;
750 case SCTP_SET_PRIM_ADDR:
751 asoc->peer_supports_asconf_setprim = 1;
752 m_result = sctp_process_asconf_set_primary(aph, stcb,
753 error);
754 break;
755 case SCTP_SUCCESS_REPORT:
756 /* not valid in an ASCONF chunk */
757 break;
758 case SCTP_ULP_ADAPTION:
759 /* FIX */
760 break;
761 default:
762 if ((param_type & 0x8000) == 0) {
763 /* Been told to STOP at this param */
764 asconf_limit = offset;
765 /* FIX FIX - We need to call sctp_arethere_unrecognized_parameters()
766 * to get a operr and send it for any param's with the
767 * 0x4000 bit set OR do it here ourselves... note we still
768 * must STOP if the 0x8000 bit is clear.
769 */
770 }
771 /* unknown/invalid param type */
772 break;
773 } /* switch */
774
775 /* add any (error) result to the reply mbuf chain */
776 if (m_result != NULL) {
777 #ifdef SCTP_DEBUG
778 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
779 kprintf("handle_asconf: adding reply...\n");
780 }
781 #endif /* SCTP_DEBUG */
782 m_tail->m_next = m_result;
783 m_tail = m_result;
784 /* update lengths, make sure it's aligned too */
785 m_result->m_len = SCTP_SIZE32(m_result->m_len);
786 m_ack->m_pkthdr.len += m_result->m_len;
787 ack_cp->ch.chunk_length += m_result->m_len;
788 /* set flag to force success reports */
789 error = 1;
790 }
791
792 offset += SCTP_SIZE32(param_length);
793 /* update remaining ASCONF message length to process */
794 if (offset >= asconf_limit) {
795 /* no more data in the mbuf chain */
796 break;
797 }
798 /* get pointer to next asconf param */
799 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
800 sizeof(struct sctp_asconf_paramhdr),
801 (uint8_t *)&aparam_buf);
802 if (aph == NULL) {
803 /* can't get an asconf paramhdr */
804 #ifdef SCTP_DEBUG
805 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
806 kprintf("handle_asconf: can't get asconf param hdr!\n");
807 }
808 #endif /* SCTP_DEBUG */
809 /* FIX ME - add error here... */
810 }
811 } /* while */
812
813 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length);
814 /* save the ASCONF-ACK reply */
815 asoc->last_asconf_ack_sent = m_ack;
816 /* and send (a new one) it out... */
817 sctp_send_asconf_ack(stcb, 0);
818 }
819
820 /*
821 * does the address match?
822 * returns 0 if not, 1 if so
823 */
824 static uint32_t
825 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa)
826 {
827 #ifdef INET6
828 if (sa->sa_family == AF_INET6) {
829 /* IPv6 sa address */
830 /* XXX scopeid */
831 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
832 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) &&
833 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr,
834 sizeof(struct in6_addr)) == 0)) {
835 return (1);
836 }
837 } else
838 #endif /* INET6 */
839 if (sa->sa_family == AF_INET) {
840 /* IPv4 sa address */
841 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
842 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) &&
843 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr,
844 sizeof(struct in_addr)) == 0)) {
845 return (1);
846 }
847 }
848 return (0);
849 }
850
851 /*
852 * Cleanup for non-responded/OP ERR'd ASCONF
853 */
854 void
855 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net)
856 {
857 #ifdef SCTP_DEBUG
858 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
859 kprintf("asconf_cleanup: marking peer ASCONF incapable and cleaning up\n");
860 }
861 #endif /* SCTP_DEBUG */
862 /* mark peer as ASCONF incapable */
863 stcb->asoc.peer_supports_asconf = 0;
864 stcb->asoc.peer_supports_asconf_setprim = 0;
865 /*
866 * clear out any existing asconfs going out
867 */
868 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net);
869 stcb->asoc.asconf_seq_out++;
870 /* remove the old ASCONF on our outbound queue */
871 sctp_toss_old_asconf(stcb);
872 }
873
874 /*
875 * process an ADD/DELETE IP ack from peer
876 * ifa: corresponding ifaddr to the address being added/deleted
877 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS
878 * flag: 1=success, 0=failure
879 */
880 static void
881 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct ifaddr *addr,
882 uint16_t type, uint32_t flag)
883 {
884
885 /*
886 * do the necessary asoc list work-
887 * if we get a failure indication, leave the address on the
888 * "do not use" asoc list
889 * if we get a success indication, remove the address from
890 * the list
891 */
892 /*
893 * Note: this will only occur for ADD_IP_ADDRESS, since
894 * DEL_IP_ADDRESS is never actually added to the list...
895 */
896 if (flag) {
897 /* success case, so remove from the list */
898 sctp_del_local_addr_assoc(stcb, addr);
899 }
900 /* else, leave it on the list */
901 }
902
903 /*
904 * add an asconf add/delete IP address parameter to the queue
905 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR
906 * returns 0 if completed, non-zero if not completed
907 * NOTE: if adding, but delete already scheduled (and not yet
908 * sent out), simply remove from queue. Same for deleting
909 * an address already scheduled for add. If a duplicate
910 * operation is found, ignore the new one.
911 */
912 static uint32_t
913 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct ifaddr *ifa, uint16_t type)
914 {
915 struct sctp_asconf_addr *aa, *aa_next;
916 #ifdef SCTP_DEBUG
917 char buf[128]; /* for address in string format */
918 #endif /* SCTP_DEBUG */
919
920 /* see if peer supports ASCONF */
921 if (stcb->asoc.peer_supports_asconf == 0) {
922 #ifdef SCTP_DEBUG
923 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
924 kprintf("asconf_queue_add: peer doesn't support ASCONF\n");
925 }
926 #endif /* SCTP_DEBUG */
927 return (-1);
928 }
929
930 /* make sure the request isn't already in the queue */
931 for (aa=TAILQ_FIRST(&stcb->asoc.asconf_queue); aa!=NULL; aa=aa_next) {
932 aa_next = TAILQ_NEXT(aa, next);
933 /* address match? */
934 if (sctp_asconf_addr_match(aa, ifa->ifa_addr) == 0)
935 continue;
936 /* is the request already in queue (sent or not) */
937 if (aa->ap.aph.ph.param_type == type) {
938 #ifdef SCTP_DEBUG
939 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
940 kprintf("asconf_queue_add: request already exists\n");
941 }
942 #endif /* SCTP_DEBUG */
943 return (-1);
944 }
945 /* is the negative request already in queue, and not sent */
946 if (aa->sent == 0 &&
947 /* add requested, delete already queued */
948 ((type == SCTP_ADD_IP_ADDRESS &&
949 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) ||
950 /* delete requested, add already queued */
951 (type == SCTP_DEL_IP_ADDRESS &&
952 aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS))) {
953 /* delete the existing entry in the queue */
954 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
955 /* take the entry off the appropriate list */
956 sctp_asconf_addr_mgmt_ack(stcb, aa->ifa, type, 1);
957 /* free the entry */
958 FREE(aa, M_PCB);
959
960 #ifdef SCTP_DEBUG
961 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
962 kprintf("asconf_queue_add: removing 'opposite' queued request\n");
963 }
964 #endif /* SCTP_DEBUG */
965 return (-1);
966 }
967 } /* for each aa */
968
969 /* adding new request to the queue */
970 MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), M_PCB, M_NOWAIT);
971 if (aa == NULL) {
972 /* didn't get memory */
973 #ifdef SCTP_DEBUG
974 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
975 kprintf("asconf_queue_add: failed to get memory!\n");
976 }
977 #endif /* SCTP_DEBUG */
978 return (-1);
979 }
980 /* fill in asconf address parameter fields */
981 /* top level elements are "networked" during send */
982 aa->ap.aph.ph.param_type = type;
983 aa->ifa = ifa;
984 /* correlation_id filled in during send routine later... */
985 if (ifa->ifa_addr->sa_family == AF_INET6) {
986 /* IPv6 address */
987 struct sockaddr_in6 *sin6;
988
989 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
990 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
991 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
992 aa->ap.aph.ph.param_length =
993 sizeof(struct sctp_asconf_paramhdr) +
994 sizeof(struct sctp_ipv6addr_param);
995 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
996 sizeof(struct in6_addr));
997 #ifdef SCTP_DEBUG
998 strlcpy(buf, ip6_sprintf(&sin6->sin6_addr), sizeof(buf));
999 #endif /* SCTP_DEBUG */
1000
1001 } else if (ifa->ifa_addr->sa_family == AF_INET) {
1002 /* IPv4 address */
1003 struct sockaddr_in *sin = (struct sockaddr_in *)ifa->ifa_addr;
1004 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1005 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1006 aa->ap.aph.ph.param_length =
1007 sizeof(struct sctp_asconf_paramhdr) +
1008 sizeof(struct sctp_ipv4addr_param);
1009 memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1010 sizeof(struct in_addr));
1011 #ifdef SCTP_DEBUG
1012 strlcpy(buf, inet_ntoa(sin->sin_addr), sizeof(buf));
1013 #endif /* SCTP_DEBUG */
1014 } else {
1015 /* invalid family! */
1016 return (-1);
1017 }
1018 aa->sent = 0; /* clear sent flag */
1019
1020 /*
1021 * if we are deleting an address it should go out last
1022 * otherwise, add it to front of the pending queue
1023 */
1024 if (type == SCTP_ADD_IP_ADDRESS) {
1025 /* add goes to the front of the queue */
1026 TAILQ_INSERT_HEAD(&stcb->asoc.asconf_queue, aa, next);
1027 #ifdef SCTP_DEBUG
1028 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1029 kprintf("asconf_queue_add: appended asconf ADD_IP_ADDRESS: %s\n", buf);
1030 }
1031 #endif /* SCTP_DEBUG */
1032 } else {
1033 /* delete and set primary goes to the back of the queue */
1034 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1035 #ifdef SCTP_DEBUG
1036 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1037 if (type == SCTP_DEL_IP_ADDRESS) {
1038 kprintf("asconf_queue_add: inserted asconf DEL_IP_ADDRESS: %s\n", buf);
1039 } else {
1040 kprintf("asconf_queue_add: inserted asconf SET_PRIM_ADDR: %s\n", buf);
1041 }
1042 }
1043 #endif /* SCTP_DEBUG */
1044 }
1045
1046 return (0);
1047 }
1048
1049 /*
1050 * add an asconf add/delete IP address parameter to the queue by addr
1051 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR
1052 * returns 0 if completed, non-zero if not completed
1053 * NOTE: if adding, but delete already scheduled (and not yet
1054 * sent out), simply remove from queue. Same for deleting
1055 * an address already scheduled for add. If a duplicate
1056 * operation is found, ignore the new one.
1057 */
1058 static uint32_t
1059 sctp_asconf_queue_add_sa(struct sctp_tcb *stcb, struct sockaddr *sa,
1060 uint16_t type)
1061 {
1062 struct sctp_asconf_addr *aa, *aa_next;
1063
1064 /* see if peer supports ASCONF */
1065 if (stcb->asoc.peer_supports_asconf == 0) {
1066 #ifdef SCTP_DEBUG
1067 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1068 kprintf("asconf_queue_add_sa: peer doesn't support ASCONF\n");
1069 }
1070 #endif /* SCTP_DEBUG */
1071 return (-1);
1072 }
1073
1074 /* make sure the request isn't already in the queue */
1075 for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL;
1076 aa = aa_next) {
1077 aa_next = TAILQ_NEXT(aa, next);
1078 /* address match? */
1079 if (sctp_asconf_addr_match(aa, sa) == 0)
1080 continue;
1081 /* is the request already in queue (sent or not) */
1082 if (aa->ap.aph.ph.param_type == type) {
1083 #ifdef SCTP_DEBUG
1084 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1085 kprintf("asconf_queue_add_sa: request already exists\n");
1086 }
1087 #endif /* SCTP_DEBUG */
1088 return (-1);
1089 }
1090
1091 /* is the negative request already in queue, and not sent */
1092 if (aa->sent == 1)
1093 continue;
1094 if (type == SCTP_ADD_IP_ADDRESS &&
1095 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
1096 /* add requested, delete already queued */
1097
1098 /* delete the existing entry in the queue */
1099 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1100 /* free the entry */
1101 FREE(aa, M_PCB);
1102 #ifdef SCTP_DEBUG
1103 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1104 kprintf("asconf_queue_add_sa: removing queued delete request\n");
1105 }
1106 #endif /* SCTP_DEBUG */
1107 return (-1);
1108 } else if (type == SCTP_DEL_IP_ADDRESS &&
1109 aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) {
1110 /* delete requested, add already queued */
1111
1112 /* delete the existing entry in the queue */
1113 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1114 /* take the entry off the appropriate list */
1115 sctp_asconf_addr_mgmt_ack(stcb, aa->ifa, type, 1);
1116 /* free the entry */
1117 FREE(aa, M_PCB);
1118 #ifdef SCTP_DEBUG
1119 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1120 kprintf("asconf_queue_add_sa: removing queued add request\n");
1121 }
1122 #endif /* SCTP_DEBUG */
1123 return (-1);
1124 }
1125 } /* for each aa */
1126
1127 /* adding new request to the queue */
1128 MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), M_PCB, M_NOWAIT);
1129 if (aa == NULL) {
1130 /* didn't get memory */
1131 #ifdef SCTP_DEBUG
1132 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1133 kprintf("asconf_queue_add_sa: failed to get memory!\n");
1134 }
1135 #endif /* SCTP_DEBUG */
1136 return (-1);
1137 }
1138 /* fill in asconf address parameter fields */
1139 /* top level elements are "networked" during send */
1140 aa->ap.aph.ph.param_type = type;
1141 aa->ifa = sctp_find_ifa_by_addr(sa);
1142 /* correlation_id filled in during send routine later... */
1143 if (sa->sa_family == AF_INET6) {
1144 /* IPv6 address */
1145 struct sockaddr_in6 *sin6;
1146
1147 sin6 = (struct sockaddr_in6 *)sa;
1148 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1149 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1150 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param);
1151 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1152 sizeof(struct in6_addr));
1153 } else if (sa->sa_family == AF_INET) {
1154 /* IPv4 address */
1155 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
1156 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1157 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1158 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param);
1159 memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1160 sizeof(struct in_addr));
1161 } else {
1162 /* invalid family! */
1163 return (-1);
1164 }
1165 aa->sent = 0; /* clear sent flag */
1166
1167 /*
1168 * if we are deleting an address it should go out last
1169 * otherwise, add it to front of the pending queue
1170 */
1171 if (type == SCTP_ADD_IP_ADDRESS) {
1172 /* add goes to the front of the queue */
1173 TAILQ_INSERT_HEAD(&stcb->asoc.asconf_queue, aa, next);
1174 #ifdef SCTP_DEBUG
1175 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1176 kprintf("asconf_queue_add_sa: appended asconf ADD_IP_ADDRESS\n");
1177 }
1178 #endif /* SCTP_DEBUG */
1179 } else {
1180 /* delete and set primary goes to the back of the queue */
1181 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1182 #ifdef SCTP_DEBUG
1183 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1184 if (type == SCTP_DEL_IP_ADDRESS) {
1185 kprintf("asconf_queue_add_sa: inserted asconf DEL_IP_ADDRESS\n");
1186 } else {
1187 kprintf("asconf_queue_add_sa: inserted asconf SET_PRIM_ADDR\n");
1188 }
1189 }
1190 #endif /* SCTP_DEBUG */
1191 }
1192
1193 return (0);
1194 }
1195
1196 /*
1197 * find a specific asconf param on our "sent" queue
1198 */
1199 static struct sctp_asconf_addr *
1200 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id)
1201 {
1202 struct sctp_asconf_addr *aa;
1203
1204 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
1205 if (aa->ap.aph.correlation_id == correlation_id &&
1206 aa->sent == 1) {
1207 /* found it */
1208 return (aa);
1209 }
1210 }
1211 /* didn't find it */
1212 return (NULL);
1213 }
1214
1215 /*
1216 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter
1217 * and do notifications based on the error response
1218 */
1219 static void
1220 sctp_asconf_process_error(struct sctp_tcb *stcb,
1221 struct sctp_asconf_paramhdr *aph)
1222 {
1223 struct sctp_error_cause *eh;
1224 struct sctp_paramhdr *ph;
1225 uint16_t param_type;
1226 uint16_t error_code;
1227
1228 eh = (struct sctp_error_cause *)(aph + 1);
1229 ph = (struct sctp_paramhdr *)(eh + 1);
1230 /* validate lengths */
1231 if (htons(eh->length) + sizeof(struct sctp_error_cause) >
1232 htons(aph->ph.param_length)) {
1233 /* invalid error cause length */
1234 #ifdef SCTP_DEBUG
1235 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1236 kprintf("asconf_process_error: cause element too long\n");
1237 }
1238 #endif /* SCTP_DEBUG */
1239 return;
1240 }
1241 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) >
1242 htons(eh->length)) {
1243 /* invalid included TLV length */
1244 #ifdef SCTP_DEBUG
1245 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1246 kprintf("asconf_process_error: included TLV too long\n");
1247 }
1248 #endif /* SCTP_DEBUG */
1249 return;
1250 }
1251
1252 /* which error code ? */
1253 error_code = ntohs(eh->code);
1254 param_type = ntohs(aph->ph.param_type);
1255 /* FIX: this should go back up the REMOTE_ERROR ULP notify */
1256 switch (error_code) {
1257 case SCTP_ERROR_RESOURCE_SHORTAGE:
1258 /* we allow ourselves to "try again" for this error */
1259 break;
1260 default:
1261 /* peer can't handle it... */
1262 switch (param_type) {
1263 case SCTP_ADD_IP_ADDRESS:
1264 case SCTP_DEL_IP_ADDRESS:
1265 stcb->asoc.peer_supports_asconf = 0;
1266 break;
1267 case SCTP_SET_PRIM_ADDR:
1268 stcb->asoc.peer_supports_asconf_setprim = 0;
1269 break;
1270 default:
1271 break;
1272 }
1273 }
1274 }
1275
1276 /*
1277 * process an asconf queue param
1278 * aparam: parameter to process, will be removed from the queue
1279 * flag: 1=success, 0=failure
1280 */
1281 static void
1282 sctp_asconf_process_param_ack(struct sctp_tcb *stcb,
1283 struct sctp_asconf_addr *aparam, uint32_t flag)
1284 {
1285 uint16_t param_type;
1286
1287 /* process this param */
1288 param_type = aparam->ap.aph.ph.param_type;
1289 #ifdef SCTP_DEBUG
1290 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1291 kprintf("process_param_ack: handling asconf parameter type=%xh\n", param_type);
1292 }
1293 #endif /* SCTP_DEBUG */
1294 switch (param_type) {
1295 case SCTP_ADD_IP_ADDRESS:
1296 #ifdef SCTP_DEBUG
1297 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1298 kprintf("process_param_ack: added IP address\n");
1299 }
1300 #endif /* SCTP_DEBUG */
1301 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, param_type, flag);
1302 break;
1303 case SCTP_DEL_IP_ADDRESS:
1304 #ifdef SCTP_DEBUG
1305 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1306 kprintf("process_param_ack: deleted IP address\n");
1307 }
1308 #endif /* SCTP_DEBUG */
1309 /* nothing really to do... lists already updated */
1310 break;
1311 case SCTP_SET_PRIM_ADDR:
1312 /* nothing to do... peer may start using this addr */
1313 if (flag == 0)
1314 stcb->asoc.peer_supports_asconf_setprim = 0;
1315 break;
1316 default:
1317 /* should NEVER happen */
1318 break;
1319 } /* switch */
1320
1321 /* remove the param and free it */
1322 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next);
1323 FREE(aparam, M_PCB);
1324 }
1325
1326 /*
1327 * cleanup from a bad asconf ack parameter
1328 */
1329 static void
1330 sctp_asconf_ack_clear(struct sctp_tcb *stcb)
1331 {
1332 /* assume peer doesn't really know how to do asconfs */
1333 stcb->asoc.peer_supports_asconf = 0;
1334 stcb->asoc.peer_supports_asconf_setprim = 0;
1335 /* XXX we could free the pending queue here */
1336 }
1337
1338 void
1339 sctp_handle_asconf_ack(struct mbuf *m, int offset,
1340 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb,
1341 struct sctp_nets *net)
1342 {
1343 struct sctp_association *asoc;
1344 uint32_t serial_num;
1345 uint16_t ack_length;
1346 struct sctp_asconf_paramhdr *aph;
1347 struct sctp_asconf_addr *aa, *aa_next;
1348 uint32_t last_error_id = 0; /* last error correlation id */
1349 uint32_t id;
1350 struct sctp_asconf_addr *ap;
1351 /* asconf param buffer */
1352 static u_int8_t aparam_buf[DEFAULT_PARAM_BUFFER];
1353
1354 /* verify minimum length */
1355 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) {
1356 #ifdef SCTP_DEBUG
1357 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1358 kprintf("handle_asconf_ack: chunk too small = %xh\n",
1359 ntohs(cp->ch.chunk_length));
1360 }
1361 #endif /* SCTP_DEBUG */
1362 return;
1363 }
1364
1365 asoc = &stcb->asoc;
1366 serial_num = ntohl(cp->serial_number);
1367
1368 /*
1369 * NOTE: we may want to handle this differently- currently, we
1370 * will abort when we get an ack for the expected serial number + 1
1371 * (eg. we didn't send it), process an ack normally if it is the
1372 * expected serial number, and re-send the previous ack for *ALL*
1373 * other serial numbers
1374 */
1375
1376 /*
1377 * if the serial number is the next expected, but I didn't send it,
1378 * abort the asoc, since someone probably just hijacked us...
1379 */
1380 if (serial_num == (asoc->asconf_seq_out + 1)) {
1381 sctp_abort_an_association(stcb->sctp_ep, stcb,
1382 SCTP_ERROR_ILLEGAL_ASCONF_ACK, NULL);
1383 #ifdef SCTP_DEBUG
1384 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1385 kprintf("handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n");
1386 }
1387 #endif /* SCTP_DEBUG */
1388 return;
1389 }
1390
1391 if (serial_num != asoc->asconf_seq_out) {
1392 /* got a duplicate/unexpected ASCONF-ACK */
1393 #ifdef SCTP_DEBUG
1394 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1395 kprintf("handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", serial_num, asoc->asconf_seq_out);
1396 }
1397 #endif /* SCTP_DEBUG */
1398 return;
1399 }
1400 /* stop our timer */
1401 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net);
1402
1403 /* process the ASCONF-ACK contents */
1404 ack_length = ntohs(cp->ch.chunk_length) -
1405 sizeof(struct sctp_asconf_ack_chunk);
1406 offset += sizeof(struct sctp_asconf_ack_chunk);
1407 /* process through all parameters */
1408 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) {
1409 unsigned int param_length, param_type;
1410
1411 /* get pointer to next asconf parameter */
1412 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
1413 sizeof(struct sctp_asconf_paramhdr), aparam_buf);
1414 if (aph == NULL) {
1415 /* can't get an asconf paramhdr */
1416 sctp_asconf_ack_clear(stcb);
1417 return;
1418 }
1419 param_type = ntohs(aph->ph.param_type);
1420 param_length = ntohs(aph->ph.param_length);
1421 if (param_length > ack_length) {
1422 sctp_asconf_ack_clear(stcb);
1423 return;
1424 }
1425 if (param_length < sizeof(struct sctp_paramhdr)) {
1426 sctp_asconf_ack_clear(stcb);
1427 return;
1428 }
1429
1430 /* get the complete parameter... */
1431 if (param_length > sizeof(aparam_buf)) {
1432 #ifdef SCTP_DEBUG
1433 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1434 kprintf("param length (%u) larger than buffer size!\n", param_length);
1435 }
1436 #endif /* SCTP_DEBUG */
1437 sctp_asconf_ack_clear(stcb);
1438 return;
1439 }
1440 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
1441 if (aph == NULL) {
1442 sctp_asconf_ack_clear(stcb);
1443 return;
1444 }
1445 /* correlation_id is transparent to peer, no ntohl needed */
1446 id = aph->correlation_id;
1447
1448 switch (param_type) {
1449 case SCTP_ERROR_CAUSE_IND:
1450 last_error_id = id;
1451 /* find the corresponding asconf param in our queue */
1452 ap = sctp_asconf_find_param(stcb, id);
1453 if (ap == NULL) {
1454 /* hmm... can't find this in our queue! */
1455 break;
1456 }
1457 /* process the parameter, failed flag */
1458 sctp_asconf_process_param_ack(stcb, ap, 0);
1459 /* process the error response */
1460 sctp_asconf_process_error(stcb, aph);
1461 break;
1462 case SCTP_SUCCESS_REPORT:
1463 /* find the corresponding asconf param in our queue */
1464 ap = sctp_asconf_find_param(stcb, id);
1465 if (ap == NULL) {
1466 /* hmm... can't find this in our queue! */
1467 break;
1468 }
1469 /* process the parameter, success flag */
1470 sctp_asconf_process_param_ack(stcb, ap, 1);
1471 break;
1472 default:
1473 break;
1474 } /* switch */
1475
1476 /* update remaining ASCONF-ACK message length to process */
1477 ack_length -= SCTP_SIZE32(param_length);
1478 if (ack_length <= 0) {
1479 /* no more data in the mbuf chain */
1480 break;
1481 }
1482 offset += SCTP_SIZE32(param_length);
1483 } /* while */
1484
1485 /*
1486 * if there are any "sent" params still on the queue, these are
1487 * implicitly "success", or "failed" (if we got an error back)
1488 * ... so process these appropriately
1489 *
1490 * we assume that the correlation_id's are monotonically increasing
1491 * beginning from 1 and that we don't have *that* many outstanding
1492 * at any given time
1493 */
1494 if (last_error_id == 0)
1495 last_error_id--; /* set to "max" value */
1496 for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL;
1497 aa = aa_next) {
1498 aa_next = TAILQ_NEXT(aa, next);
1499 if (aa->sent == 1) {
1500 /*
1501 * implicitly successful or failed
1502 * if correlation_id < last_error_id, then success
1503 * else, failure
1504 */
1505 if (aa->ap.aph.correlation_id < last_error_id)
1506 sctp_asconf_process_param_ack(stcb, aa,
1507 SCTP_SUCCESS_REPORT);
1508 else
1509 sctp_asconf_process_param_ack(stcb, aa,
1510 SCTP_ERROR_CAUSE_IND);
1511 } else {
1512 /*
1513 * since we always process in order (FIFO queue)
1514 * if we reach one that hasn't been sent, the
1515 * rest should not have been sent either.
1516 * so, we're done...
1517 */
1518 break;
1519 }
1520 }
1521
1522 /* update the next sequence number to use */
1523 asoc->asconf_seq_out++;
1524 /* remove the old ASCONF on our outbound queue */
1525 sctp_toss_old_asconf(stcb);
1526 /* clear the sent flag to allow new ASCONFs */
1527 asoc->asconf_sent = 0;
1528 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) {
1529 /* we have more params, so restart our timer */
1530 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep,
1531 stcb, net);
1532 }
1533 }
1534
1535 /* is this an interface that we care about at all? */
1536 static uint32_t
1537 sctp_is_desired_interface_type(struct ifaddr *ifa)
1538 {
1539 int result;
1540
1541 /* check the interface type to see if it's one we care about */
1542 switch (ifa->ifa_ifp->if_type) {
1543 case IFT_ETHER:
1544 case IFT_ISO88023:
1545 case IFT_STARLAN:
1546 case IFT_P10:
1547 case IFT_P80:
1548 case IFT_HY:
1549 case IFT_PPP:
1550 case IFT_XETHER:
1551 case IFT_SLIP:
1552 case IFT_GIF:
1553 result = 1;
1554 break;
1555 default:
1556 #ifdef SCTP_DEBUG
1557 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1558 kprintf("ignoring interface type = %u\n",
1559 ifa->ifa_ifp->if_type);
1560 }
1561 #endif /* SCTP_DEBUG */
1562 result = 0;
1563 } /* end switch */
1564
1565 return (result);
1566 }
1567
1568 static uint32_t
1569 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa)
1570 {
1571 struct sockaddr_in6 *sin6, *net6;
1572 struct sctp_nets *net;
1573
1574 if (sa->sa_family != AF_INET6) {
1575 /* wrong family */
1576 return (0);
1577 }
1578
1579 sin6 = (struct sockaddr_in6 *)sa;
1580 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) {
1581 /* not link local address */
1582 return (0);
1583 }
1584
1585 /* hunt through our destination nets list for this scope_id */
1586 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1587 if (((struct sockaddr *)(&net->ro._l_addr))->sa_family !=
1588 AF_INET6)
1589 continue;
1590 net6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1591 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0)
1592 continue;
1593 if (sctp_is_same_scope(sin6, net6)) {
1594 /* found one */
1595 return (1);
1596 }
1597 }
1598 /* didn't find one */
1599 return (0);
1600 }
1601
1602 /*
1603 * address management functions
1604 */
1605 static void
1606 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1607 struct ifaddr *ifa, uint16_t type)
1608 {
1609 int status;
1610 #ifdef SCTP_DEBUG
1611 char buf[128]; /* for address in string format */
1612 #endif /* SCTP_DEBUG */
1613
1614 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 &&
1615 (inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0) {
1616 /* subset bound, no ASCONF allowed case, so ignore */
1617 return;
1618 }
1619
1620 /*
1621 * note: we know this is not the subset bound, no ASCONF case
1622 * eg. this is boundall or subset bound w/ASCONF allowed
1623 */
1624
1625 /* first, make sure it's a good address family */
1626 if (ifa->ifa_addr->sa_family != AF_INET6 &&
1627 ifa->ifa_addr->sa_family != AF_INET) {
1628 return;
1629 }
1630
1631 /* make sure we're "allowed" to add this type of addr */
1632 if (ifa->ifa_addr->sa_family == AF_INET6) {
1633 struct in6_ifaddr *ifa6;
1634
1635 /* invalid if we're not a v6 endpoint */
1636 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)
1637 return;
1638 /* is the v6 addr really valid ? */
1639 ifa6 = (struct in6_ifaddr *)ifa;
1640 if (IFA6_IS_DEPRECATED(ifa6) ||
1641 (ifa6->ia6_flags &
1642 (IN6_IFF_DETACHED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))) {
1643 /* can't use an invalid address */
1644 return;
1645 }
1646 }
1647
1648 /* put this address on the "pending/do not use yet" list */
1649 /*
1650 * Note: we do this primarily for the subset bind case
1651 * We don't have scoping flags at the EP level, so we must
1652 * add link local/site local addresses to the EP, then need
1653 * to "negate" them here. Recall that this routine is only
1654 * called for the subset bound w/ASCONF allowed case.
1655 */
1656
1657 /*
1658 * do a scope_id check against any link local addresses
1659 * in the destination nets list to see if we should put
1660 * this local address on the pending list or not
1661 * eg. don't put on the list if we have a link local
1662 * destination with the same scope_id
1663 */
1664 if (type == SCTP_ADD_IP_ADDRESS) {
1665 if (sctp_is_scopeid_in_nets(stcb, ifa->ifa_addr) == 0) {
1666 sctp_add_local_addr_assoc(stcb, ifa);
1667 #ifdef SCTP_DEBUG
1668 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1669 kprintf("addr_mgmt_assoc: added to pending list ");
1670 sctp_print_address(ifa->ifa_addr);
1671 }
1672 #endif /* SCTP_DEBUG */
1673 }
1674 }
1675 /*
1676 * check address scope
1677 * if address is out of scope, don't queue anything...
1678 * note: this would leave the address on both inp and asoc lists
1679 */
1680 if (ifa->ifa_addr->sa_family == AF_INET6) {
1681 struct sockaddr_in6 *sin6;
1682
1683 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1684 #ifdef SCTP_DEBUG
1685 strlcpy(buf, ip6_sprintf(&sin6->sin6_addr), sizeof(buf));
1686 #endif /* SCTP_DEBUG */
1687 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1688 /* we skip unspecifed addresses */
1689 #ifdef SCTP_DEBUG
1690 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1691 kprintf("addr_mgmt_assoc: unspecified IPv6 addr\n");
1692 }
1693 #endif /* SCTP_DEBUG */
1694 return;
1695 }
1696 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1697 if (stcb->asoc.local_scope == 0) {
1698 #ifdef SCTP_DEBUG
1699 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1700 kprintf("addr_mgmt_assoc: skipping link local IPv6 addr: %s\n", buf);
1701 }
1702 #endif /* SCTP_DEBUG */
1703 return;
1704 }
1705 /* is it the right link local scope? */
1706 if (sctp_is_scopeid_in_nets(stcb, ifa->ifa_addr) == 0) {
1707 #ifdef SCTP_DEBUG
1708 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1709 kprintf("addr_mgmt_assoc: skipping link local IPv6 addr: %s, wrong scope_id\n", buf);
1710 }
1711 #endif /* SCTP_DEBUG */
1712 return;
1713 }
1714 }
1715 if (stcb->asoc.site_scope == 0 &&
1716 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
1717 #ifdef SCTP_DEBUG
1718 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1719 kprintf("addr_mgmt_assoc: skipping site local IPv6 addr: %s\n", buf);
1720 }
1721 #endif /* SCTP_DEBUG */
1722 return;
1723 }
1724 } else if (ifa->ifa_addr->sa_family == AF_INET) {
1725 struct sockaddr_in *sin;
1726 struct in6pcb *inp6;
1727
1728 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
1729 /* invalid if we are a v6 only endpoint */
1730 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1731 #if defined(__OpenBSD__)
1732 (0) /* we always do dual bind */
1733 #elif defined (__NetBSD__)
1734 (inp6->in6p_flags & IN6P_IPV6_V6ONLY)
1735 #else
1736 (inp6->inp_flags & IN6P_IPV6_V6ONLY)
1737 #endif
1738 )
1739 return;
1740
1741 sin = (struct sockaddr_in *)ifa->ifa_addr;
1742 #ifdef SCTP_DEBUG
1743 strlcpy(buf, inet_ntoa(sin->sin_addr), sizeof(buf));
1744 #endif /* SCTP_DEBUG */
1745 if (sin->sin_addr.s_addr == 0) {
1746 /* we skip unspecifed addresses */
1747 #ifdef SCTP_DEBUG
1748 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1749 kprintf("addr_mgmt_assoc: unspecified IPv4 addr\n");
1750 }
1751 #endif /* SCTP_DEBUG */
1752 return;
1753 }
1754 if (stcb->asoc.ipv4_local_scope == 0 &&
1755 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1756 #ifdef SCTP_DEBUG
1757 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1758 kprintf("addr_mgmt_assoc: skipping private IPv4 addr: %s\n", buf);
1759 }
1760 #endif /* SCTP_DEBUG */
1761 return;
1762 }
1763 } else {
1764 /* else, not AF_INET or AF_INET6, so skip */
1765 #ifdef SCTP_DEBUG
1766 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1767 kprintf("addr_mgmt_assoc: not AF_INET or AF_INET6\n");
1768 }
1769 #endif /* SCTP_DEBUG */
1770 return;
1771 }
1772
1773 /* queue an asconf for this address add/delete */
1774 if (inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) {
1775 /* does the peer do asconf? */
1776 if (stcb->asoc.peer_supports_asconf) {
1777 /* queue an asconf for this addr */
1778 status = sctp_asconf_queue_add(stcb, ifa, type);
1779 /*
1780 * if queued ok, and in correct state, set the
1781 * ASCONF timer
1782 * if in non-open state, we will set this timer
1783 * when the state does go open and do all the
1784 * asconf's
1785 */
1786 if (status == 0 &&
1787 SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
1788 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
1789 stcb, stcb->asoc.primary_destination);
1790 }
1791 }
1792 } else {
1793 /* this is the boundall, no ASCONF case */
1794 #if 0 /* assume kernel will delete this very shortly; add done above */
1795 if (type == SCTP_DEL_IP_ADDRESS) {
1796 /* if deleting, add this addr to the do not use list */
1797 sctp_add_local_addr_assoc(stcb, ifa);
1798 }
1799 #endif
1800 }
1801 }
1802
1803 static void
1804 sctp_addr_mgmt_ep(struct sctp_inpcb *inp, struct ifaddr *ifa, uint16_t type)
1805 {
1806 struct sctp_tcb *stcb;
1807
1808 SCTP_INP_WLOCK(inp);
1809 /* make sure we're "allowed" to add this type of addr */
1810 if (ifa->ifa_addr->sa_family == AF_INET6) {
1811 struct in6_ifaddr *ifa6;
1812
1813 /* invalid if we're not a v6 endpoint */
1814 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1815 SCTP_INP_WUNLOCK(inp);
1816 return;
1817 }
1818 /* is the v6 addr really valid ? */
1819 ifa6 = (struct in6_ifaddr *)ifa;
1820 if (IFA6_IS_DEPRECATED(ifa6) ||
1821 (ifa6->ia6_flags &
1822 (IN6_IFF_DETACHED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))) {
1823 /* can't use an invalid address */
1824 SCTP_INP_WUNLOCK(inp);
1825 return;
1826 }
1827 } else if (ifa->ifa_addr->sa_family == AF_INET) {
1828 /* invalid if we are a v6 only endpoint */
1829 struct in6pcb *inp6;
1830 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
1831
1832 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1833 #if defined(__OpenBSD__)
1834 (0) /* we always do dual bind */
1835 #elif defined (__NetBSD__)
1836 (inp6->in6p_flags & IN6P_IPV6_V6ONLY)
1837 #else
1838 (inp6->inp_flags & IN6P_IPV6_V6ONLY)
1839 #endif
1840 ) {
1841 SCTP_INP_WUNLOCK(inp);
1842 return;
1843 }
1844 } else {
1845 /* invalid address family */
1846 SCTP_INP_WUNLOCK(inp);
1847 return;
1848 }
1849 /* is this endpoint subset bound ? */
1850 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1851 /* subset bound endpoint */
1852 if ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0) {
1853 /*
1854 * subset bound, but ASCONFs not allowed...
1855 * if adding, nothing to do, since not allowed
1856 * if deleting, remove address from endpoint
1857 * peer will have to "timeout" this addr
1858 */
1859 if (type == SCTP_DEL_IP_ADDRESS) {
1860 sctp_del_local_addr_ep(inp, ifa);
1861 }
1862 /* no asconfs to queue for this inp... */
1863 SCTP_INP_WUNLOCK(inp);
1864 return;
1865 } else {
1866 /*
1867 * subset bound, ASCONFs allowed...
1868 * if adding, add address to endpoint list
1869 * if deleting, remove address from endpoint
1870 */
1871 if (type == SCTP_ADD_IP_ADDRESS) {
1872 sctp_add_local_addr_ep(inp, ifa);
1873 } else {
1874 sctp_del_local_addr_ep(inp, ifa);
1875 }
1876 /* drop through and notify all asocs */
1877 }
1878 }
1879
1880 crit_enter();
1881 /* process for all associations for this endpoint */
1882 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
1883 SCTP_TCB_LOCK(stcb);
1884 sctp_addr_mgmt_assoc(inp, stcb, ifa, type);
1885 SCTP_TCB_UNLOCK(stcb);
1886 } /* for each stcb */
1887 crit_exit();
1888 SCTP_INP_WUNLOCK(inp);
1889 }
1890
1891 /*
1892 * restrict the use of this address
1893 */
1894 static void
1895 sctp_addr_mgmt_restrict_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
1896 {
1897 struct sctp_tcb *stcb;
1898
1899 /* is this endpoint bound to all? */
1900 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1901 /*
1902 * Nothing to do for subset bound case.
1903 * Allow sctp_bindx() to manage the address lists
1904 */
1905 return;
1906 }
1907
1908 crit_enter();
1909 SCTP_INP_RLOCK(inp);
1910 /* process for all associations for this endpoint */
1911 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
1912 /* put this address on the "pending/do not use yet" list */
1913 SCTP_TCB_LOCK(stcb);
1914 sctp_add_local_addr_assoc(stcb, ifa);
1915 SCTP_TCB_UNLOCK(stcb);
1916 #ifdef SCTP_DEBUG
1917 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1918 kprintf("restrict_ep: added addr to unusable list\n");
1919 }
1920 #endif /* SCTP_DEBUG */
1921 } /* for each stcb */
1922 crit_exit();
1923 SCTP_INP_RUNLOCK(inp);
1924 }
1925
1926 /*
1927 * this is only called for kernel initiated address changes
1928 * eg. it will check the PCB_FLAGS_AUTO_ASCONF flag
1929 */
1930 static void
1931 sctp_addr_mgmt(struct ifaddr *ifa, uint16_t type) {
1932 struct sockaddr *sa;
1933 struct sctp_inpcb *inp;
1934
1935 /* make sure we care about this interface... */
1936 if (!sctp_is_desired_interface_type(ifa)) {
1937 #ifdef SCTP_DEBUG
1938 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1939 kprintf("sctp_addr_mgmt: ignoring this interface\n");
1940 }
1941 #endif /* SCTP_DEBUG */
1942 return;
1943 }
1944
1945 sa = ifa->ifa_addr;
1946 if (sa->sa_family != AF_INET && sa->sa_family != AF_INET6)
1947 return;
1948
1949 #ifdef SCTP_DEBUG
1950 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1951 if (type == SCTP_ADD_IP_ADDRESS)
1952 kprintf("sctp_addr_mgmt: kernel adds ");
1953 else
1954 kprintf("sctp_addr_mgmt: kernel deletes ");
1955 sctp_print_address(sa);
1956 }
1957 #endif /* SCTP_DEBUG */
1958
1959 /* go through all our PCB's */
1960 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
1961 if (inp->sctp_flags & SCTP_PCB_FLAGS_AUTO_ASCONF) {
1962 sctp_addr_mgmt_ep(inp, ifa, type);
1963 } else {
1964 /* this address is going away anyways... */
1965 if (type == SCTP_DEL_IP_ADDRESS)
1966 return;
1967 /* (temporarily) restrict this address */
1968 sctp_addr_mgmt_restrict_ep(inp, ifa);
1969 }
1970 /* else, not allowing automatic asconf's, so ignore */
1971 } /* for each inp */
1972 }
1973
1974 /*
1975 * add/delete IP address requests from kernel (via routing change)
1976 * assumed that the address is non-broadcast, non-multicast
1977 * all addresses are passed from any type of interface-- need to filter
1978 * duplicate addresses may get requested
1979 */
1980
1981 void
1982 sctp_add_ip_address(struct ifaddr *ifa)
1983 {
1984 sctp_addr_mgmt(ifa, SCTP_ADD_IP_ADDRESS);
1985 }
1986
1987 void
1988 sctp_delete_ip_address(struct ifaddr *ifa)
1989 {
1990 struct sctp_inpcb *inp;
1991
1992 /* process the delete */
1993 sctp_addr_mgmt(ifa, SCTP_DEL_IP_ADDRESS);
1994
1995 /*
1996 * need to remove this ifaddr from any cached routes
1997 * and also any from any assoc "restricted/pending" lists
1998 */
1999 /* make sure we care about this interface... */
2000 if (!sctp_is_desired_interface_type(ifa)) {
2001 #ifdef SCTP_DEBUG
2002 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2003 kprintf("sctp_delete_ip_address: ignoring this interface\n");
2004 }
2005 #endif /* SCTP_DEBUG */
2006 return;
2007 }
2008
2009 /* go through all our PCB's */
2010 SCTP_INP_INFO_RLOCK();
2011 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
2012 struct sctp_tcb *stcb;
2013 struct sctp_laddr *laddr, *laddr_next;
2014
2015 /* process for all associations for this endpoint */
2016 SCTP_INP_RLOCK(inp);
2017 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
2018 struct sctp_nets *net;
2019
2020 /* process through the nets list */
2021 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2022 struct rtentry *rt;
2023 /* delete this address if cached */
2024 rt = net->ro.ro_rt;
2025 if (rt != NULL && rt->rt_ifa == ifa) {
2026 /* RTFREE(rt);*/
2027 net->ro.ro_rt = NULL;
2028 }
2029 } /* for each net */
2030 /* process through the asoc "pending" list */
2031 laddr = LIST_FIRST(&stcb->asoc.sctp_local_addr_list);
2032 while (laddr != NULL) {
2033 laddr_next = LIST_NEXT(laddr, sctp_nxt_addr);
2034 /* remove if in use */
2035 if (laddr->ifa == ifa) {
2036 sctp_remove_laddr(laddr);
2037 }
2038 laddr = laddr_next;
2039 } /* while */
2040 } /* for each stcb */
2041 /* process through the inp bound addr list */
2042 laddr = LIST_FIRST(&inp->sctp_addr_list);
2043 while (laddr != NULL) {
2044 laddr_next = LIST_NEXT(laddr, sctp_nxt_addr);
2045 /* remove if in use */
2046 if (laddr->ifa == ifa) {
2047 sctp_remove_laddr(laddr);
2048 }
2049 laddr = laddr_next;
2050 } /* while */
2051 SCTP_INP_RUNLOCK(inp);
2052 } /* for each inp */
2053 SCTP_INP_INFO_RUNLOCK();
2054 }
2055
2056 /*
2057 * sa is the sockaddr to ask the peer to set primary to
2058 * returns: 0 = completed, -1 = error
2059 */
2060 int32_t
2061 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
2062 {
2063 /* NOTE: we currently don't check the validity of the address! */
2064
2065 /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2066 if (!sctp_asconf_queue_add_sa(stcb, sa, SCTP_SET_PRIM_ADDR)) {
2067 /* set primary queuing succeeded */
2068 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2069 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2070 stcb->sctp_ep, stcb,
2071 stcb->asoc.primary_destination);
2072 }
2073 #ifdef SCTP_DEBUG
2074 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2075 kprintf("set_primary_ip_address_sa: queued on tcb=%p, ",
2076 stcb);
2077 sctp_print_address(sa);
2078 }
2079 #endif /* SCTP_DEBUG */
2080 } else {
2081 #ifdef SCTP_DEBUG
2082 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2083 kprintf("set_primary_ip_address_sa: failed to add to queue on tcb=%p, ",
2084 stcb);
2085 sctp_print_address(sa);
2086 }
2087 #endif /* SCTP_DEBUG */
2088 return (-1);
2089 }
2090 return (0);
2091 }
2092
2093 void
2094 sctp_set_primary_ip_address(struct ifaddr *ifa)
2095 {
2096 struct sctp_inpcb *inp;
2097
2098 /* make sure we care about this interface... */
2099 if (!sctp_is_desired_interface_type(ifa)) {
2100 #ifdef SCTP_DEBUG
2101 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2102 kprintf("set_primary_ip_address: ignoring this interface\n");
2103 }
2104 #endif /* SCTP_DEBUG */
2105 return;
2106 }
2107
2108 /* go through all our PCB's */
2109 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
2110 struct sctp_tcb *stcb;
2111
2112 /* process for all associations for this endpoint */
2113 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
2114 /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2115 if (!sctp_asconf_queue_add(stcb, ifa,
2116 SCTP_SET_PRIM_ADDR)) {
2117 /* set primary queuing succeeded */
2118 if (SCTP_GET_STATE(&stcb->asoc) ==
2119 SCTP_STATE_OPEN) {
2120 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2121 stcb->sctp_ep, stcb,
2122 stcb->asoc.primary_destination);
2123 }
2124 #ifdef SCTP_DEBUG
2125 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2126 kprintf("set_primary_ip_address: queued on stcb=%p, ",
2127 stcb);
2128 sctp_print_address(ifa->ifa_addr);
2129 }
2130 #endif /* SCTP_DEBUG */
2131 } else {
2132 #ifdef SCTP_DEBUG
2133 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2134 kprintf("set_primary_ip_address: failed to add to queue, ");
2135 sctp_print_address(ifa->ifa_addr);
2136 }
2137 #endif /* SCTP_DEBUG */
2138 }
2139 } /* for each stcb */
2140 } /* for each inp */
2141 }
2142
2143 static struct sockaddr *
2144 sctp_find_valid_localaddr(struct sctp_tcb *stcb)
2145 {
2146 struct ifnet *ifn;
2147 struct ifaddr *ifa;
2148
2149 TAILQ_FOREACH(ifn, &ifnet, if_list) {
2150 if (stcb->asoc.loopback_scope == 0 && ifn->if_type == IFT_LOOP) {
2151 /* Skip if loopback_scope not set */
2152 continue;
2153 }
2154 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
2155 if (ifa->ifa_addr->sa_family == AF_INET &&
2156 stcb->asoc.ipv4_addr_legal) {
2157 struct sockaddr_in *sin;
2158
2159 sin = (struct sockaddr_in *)ifa->ifa_addr;
2160 if (sin->sin_addr.s_addr == 0) {
2161 /* skip unspecifed addresses */
2162 continue;
2163 }
2164 if (stcb->asoc.ipv4_local_scope == 0 &&
2165 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))
2166 continue;
2167
2168 if (sctp_is_addr_restricted(stcb,
2169 ifa->ifa_addr))
2170 continue;
2171 /* found a valid local v4 address to use */
2172 return (ifa->ifa_addr);
2173 } else if (ifa->ifa_addr->sa_family == AF_INET6 &&
2174 stcb->asoc.ipv6_addr_legal) {
2175 struct sockaddr_in6 *sin6;
2176 struct in6_ifaddr *ifa6;
2177
2178 ifa6 = (struct in6_ifaddr *)ifa;
2179 if (IFA6_IS_DEPRECATED(ifa6) ||
2180 (ifa6->ia6_flags & (IN6_IFF_DETACHED |
2181 IN6_IFF_ANYCAST | IN6_IFF_NOTREADY)))
2182 continue;
2183
2184 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
2185 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2186 /* we skip unspecifed addresses */
2187 continue;
2188 }
2189 if (stcb->asoc.local_scope == 0 &&
2190 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
2191 continue;
2192 if (stcb->asoc.site_scope == 0 &&
2193 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))
2194 continue;
2195
2196 /* found a valid local v6 address to use */
2197 return (ifa->ifa_addr);
2198 }
2199 }
2200 }
2201 /* no valid addresses found */
2202 return (NULL);
2203 }
2204
2205 static struct sockaddr *
2206 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb)
2207 {
2208 struct sctp_laddr *laddr;
2209
2210 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
2211 if (laddr->ifa == NULL) {
2212 #ifdef SCTP_DEBUG
2213 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2214 kprintf("find_valid_localaddr_ep: laddr error\n");
2215 }
2216 #endif /* SCTP_DEBUG */
2217 continue;
2218 }
2219 if (laddr->ifa->ifa_addr == NULL) {
2220 #ifdef SCTP_DEBUG
2221 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2222 kprintf("find_valid_localaddr_ep: laddr->ifa error\n");
2223 }
2224 #endif /* SCTP_DEBUG */
2225 continue;
2226 }
2227 /* is the address restricted ? */
2228 if (sctp_is_addr_restricted(stcb, laddr->ifa->ifa_addr))
2229 continue;
2230
2231 /* found a valid local address to use */
2232 return (laddr->ifa->ifa_addr);
2233 }
2234 /* no valid addresses found */
2235 return (NULL);
2236 }
2237
2238 /*
2239 * builds an ASCONF chunk from queued ASCONF params
2240 * returns NULL on error (no mbuf, no ASCONF params queued, etc)
2241 */
2242 struct mbuf *
2243 sctp_compose_asconf(struct sctp_tcb *stcb)
2244 {
2245 struct mbuf *m_asconf, *m_asconf_chk;
2246 struct sctp_asconf_addr *aa;
2247 struct sctp_asconf_chunk *acp;
2248 struct sctp_asconf_paramhdr *aph;
2249 struct sctp_asconf_addr_param *aap;
2250 uint32_t p_length;
2251 uint32_t correlation_id = 1; /* 0 is reserved... */
2252 caddr_t ptr, lookup_ptr;
2253 uint8_t lookup_used = 0;
2254
2255 /* are there any asconf params to send? */
2256 if (TAILQ_EMPTY(&stcb->asoc.asconf_queue)) {
2257 return (NULL);
2258 }
2259
2260 /*
2261 * get a chunk header mbuf and a cluster for the asconf params
2262 * since it's simpler to fill in the asconf chunk header lookup
2263 * address on the fly
2264 */
2265 m_asconf_chk = NULL;
2266 MGETHDR(m_asconf_chk, MB_DONTWAIT, MT_DATA);
2267 if (m_asconf_chk == NULL) {
2268 /* no mbuf's */
2269 #ifdef SCTP_DEBUG
2270 if (sctp_debug_on & SCTP_DEBUG_ASCONF1)
2271 kprintf("compose_asconf: couldn't get chunk mbuf!\n");
2272 #endif /* SCTP_DEBUG */
2273 return (NULL);
2274 }
2275 m_asconf = NULL;
2276 MGETHDR(m_asconf, MB_DONTWAIT, MT_HEADER);
2277 if (m_asconf == NULL) {
2278 /* no mbuf's */
2279 #ifdef SCTP_DEBUG
2280 if (sctp_debug_on & SCTP_DEBUG_ASCONF1)
2281 kprintf("compose_asconf: couldn't get mbuf!\n");
2282 #endif /* SCTP_DEBUG */
2283 sctp_m_freem(m_asconf_chk);
2284 return (NULL);
2285 }
2286 MCLGET(m_asconf, MB_DONTWAIT);
2287 if ((m_asconf->m_flags & M_EXT) != M_EXT) {
2288 /* failed to get cluster buffer */
2289 #ifdef SCTP_DEBUG
2290 if (sctp_debug_on & SCTP_DEBUG_ASCONF1)
2291 kprintf("compose_asconf: couldn't get cluster!\n");
2292 #endif /* SCTP_DEBUG */
2293 sctp_m_freem(m_asconf_chk);
2294 sctp_m_freem(m_asconf);
2295 return (NULL);
2296 }
2297
2298 m_asconf_chk->m_len = sizeof(struct sctp_asconf_chunk);
2299 m_asconf->m_len = 0;
2300 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *);
2301 bzero(acp, sizeof(struct sctp_asconf_chunk));
2302 /* save pointers to lookup address and asconf params */
2303 lookup_ptr = (caddr_t)(acp + 1); /* after the header */
2304 ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */
2305
2306 /* fill in chunk header info */
2307 acp->ch.chunk_type = SCTP_ASCONF;
2308 acp->ch.chunk_flags = 0;
2309 acp->serial_number = htonl(stcb->asoc.asconf_seq_out);
2310
2311 /* add parameters... up to smallest MTU allowed */
2312 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2313 /* get the parameter length */
2314 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length);
2315 /* will it fit in current chunk? */
2316 if (m_asconf->m_len + p_length > stcb->asoc.smallest_mtu) {
2317 /* won't fit, so we're done with this chunk */
2318 break;
2319 }
2320 /* assign (and store) a correlation id */
2321 aa->ap.aph.correlation_id = correlation_id++;
2322
2323 /*
2324 * fill in address if we're doing a delete
2325 * this is a simple way for us to fill in the correlation
2326 * address, which should only be used by the peer if we're
2327 * deleting our source address and adding a new address
2328 * (e.g. renumbering case)
2329 */
2330 if (lookup_used == 0 &&
2331 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
2332 struct sctp_ipv6addr_param *lookup;
2333 uint16_t p_size, addr_size;
2334
2335 lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2336 lookup->ph.param_type =
2337 htons(aa->ap.addrp.ph.param_type);
2338 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) {
2339 /* copy IPv6 address */
2340 p_size = sizeof(struct sctp_ipv6addr_param);
2341 addr_size = sizeof(struct in6_addr);
2342 } else {
2343 /* copy IPv4 address */
2344 p_size = sizeof(struct sctp_ipv4addr_param);
2345 addr_size = sizeof(struct in_addr);
2346 }
2347 lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2348 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size);
2349 m_asconf_chk->m_len += SCTP_SIZE32(p_size);
2350 lookup_used = 1;
2351 }
2352
2353 /* copy into current space */
2354 memcpy(ptr, &aa->ap, p_length);
2355
2356 /* network elements and update lengths */
2357 aph = (struct sctp_asconf_paramhdr *) ptr;
2358 aap = (struct sctp_asconf_addr_param *) ptr;
2359 /* correlation_id is transparent to peer, no htonl needed */
2360 aph->ph.param_type = htons(aph->ph.param_type);
2361 aph->ph.param_length = htons(aph->ph.param_length);
2362 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type);
2363 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length);
2364
2365 m_asconf->m_len += SCTP_SIZE32(p_length);
2366 ptr += SCTP_SIZE32(p_length);
2367
2368 /*
2369 * these params are removed off the pending list upon
2370 * getting an ASCONF-ACK back from the peer, just set flag
2371 */
2372 aa->sent = 1;
2373 }
2374 /* check to see if the lookup addr has been populated yet */
2375 if (lookup_used == 0) {
2376 /* NOTE: if the address param is optional, can skip this... */
2377 /* add any valid (existing) address... */
2378 struct sctp_ipv6addr_param *lookup;
2379 uint16_t p_size, addr_size;
2380 struct sockaddr *found_addr;
2381 caddr_t addr_ptr;
2382
2383 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)
2384 found_addr = sctp_find_valid_localaddr(stcb);
2385 else
2386 found_addr = sctp_find_valid_localaddr_ep(stcb);
2387
2388 lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2389 if (found_addr != NULL) {
2390 if (found_addr->sa_family == AF_INET6) {
2391 /* copy IPv6 address */
2392 lookup->ph.param_type =
2393 htons(SCTP_IPV6_ADDRESS);
2394 p_size = sizeof(struct sctp_ipv6addr_param);
2395 addr_size = sizeof(struct in6_addr);
2396 addr_ptr = (caddr_t)&((struct sockaddr_in6 *)
2397 found_addr)->sin6_addr;
2398 } else {
2399 /* copy IPv4 address */
2400 lookup->ph.param_type =
2401 htons(SCTP_IPV4_ADDRESS);
2402 p_size = sizeof(struct sctp_ipv4addr_param);
2403 addr_size = sizeof(struct in_addr);
2404 addr_ptr = (caddr_t)&((struct sockaddr_in *)
2405 found_addr)->sin_addr;
2406 }
2407 lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2408 memcpy(lookup->addr, addr_ptr, addr_size);
2409 m_asconf_chk->m_len += SCTP_SIZE32(p_size);
2410 lookup_used = 1;
2411 } else {
2412 /* uh oh... don't have any address?? */
2413 #ifdef SCTP_DEBUG
2414 if (sctp_debug_on & SCTP_DEBUG_ASCONF1)
2415 kprintf("compose_asconf: no lookup addr!\n");
2416 #endif /* SCTP_DEBUG */
2417 /* for now, we send a IPv4 address of 0.0.0.0 */
2418 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS);
2419 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)));
2420 bzero(lookup->addr, sizeof(struct in_addr));
2421 m_asconf_chk->m_len += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param));
2422 lookup_used = 1;
2423 }
2424 }
2425
2426 /* chain it all together */
2427 m_asconf_chk->m_next = m_asconf;
2428 m_asconf_chk->m_pkthdr.len = m_asconf_chk->m_len + m_asconf->m_len;
2429 acp->ch.chunk_length = ntohs(m_asconf_chk->m_pkthdr.len);
2430
2431 /* update "sent" flag */
2432 stcb->asoc.asconf_sent++;
2433
2434 return (m_asconf_chk);
2435 }
2436
2437 /*
2438 * section to handle address changes before an association is up
2439 * eg. changes during INIT/INIT-ACK/COOKIE-ECHO handshake
2440 */
2441
2442 /*
2443 * processes the (local) addresses in the INIT-ACK chunk
2444 */
2445 static void
2446 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m,
2447 unsigned int offset, unsigned int length)
2448 {
2449 struct sctp_paramhdr tmp_param, *ph;
2450 uint16_t plen, ptype;
2451 struct sctp_ipv6addr_param addr_store;
2452 struct sockaddr_in6 sin6;
2453 struct sockaddr_in sin;
2454 struct sockaddr *sa;
2455 struct ifaddr *ifa;
2456
2457 #ifdef SCTP_DEBUG
2458 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2459 kprintf("processing init-ack addresses\n");
2460 }
2461 #endif /* SCTP_DEBUG */
2462
2463 /* convert to upper bound */
2464 length += offset;
2465
2466 if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2467 #ifdef SCTP_DEBUG
2468 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2469 kprintf("process_initack_addrs: invalid offset?\n");
2470 }
2471 #endif /* SCTP_DEBUG */
2472 return;
2473 }
2474
2475 /* init the addresses */
2476 bzero(&sin6, sizeof(sin6));
2477 sin6.sin6_family = AF_INET6;
2478 sin6.sin6_len = sizeof(sin6);
2479 sin6.sin6_port = stcb->rport;
2480
2481 bzero(&sin, sizeof(sin));
2482 sin.sin_len = sizeof(sin);
2483 sin.sin_family = AF_INET;
2484 sin.sin_port = stcb->rport;
2485
2486 /* go through the addresses in the init-ack */
2487 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2488 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2489 while (ph != NULL) {
2490 ptype = ntohs(ph->param_type);
2491 plen = ntohs(ph->param_length);
2492 if (ptype == SCTP_IPV6_ADDRESS) {
2493 struct sctp_ipv6addr_param *a6p;
2494 /* get the entire IPv6 address param */
2495 #ifdef SCTP_DEBUG
2496 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2497 kprintf("process_initack_addrs: checking IPv6 param\n");
2498 }
2499 #endif /* SCTP_DEBUG */
2500 a6p = (struct sctp_ipv6addr_param *)
2501 sctp_m_getptr(m, offset,
2502 sizeof(struct sctp_ipv6addr_param),
2503 (uint8_t *)&addr_store);
2504 if (plen != sizeof(struct sctp_ipv6addr_param) ||
2505 a6p == NULL) {
2506 #ifdef SCTP_DEBUG
2507 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2508 kprintf("process_initack_addrs: invalid IPv6 param length\n");
2509 }
2510 #endif /* SCTP_DEBUG */
2511 return;
2512 }
2513 memcpy(&sin6.sin6_addr, a6p->addr,
2514 sizeof(struct in6_addr));
2515 sa = (struct sockaddr *)&sin6;
2516 } else if (ptype == SCTP_IPV4_ADDRESS) {
2517 struct sctp_ipv4addr_param *a4p;
2518 /* get the entire IPv4 address param */
2519 #ifdef SCTP_DEBUG
2520 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2521 kprintf("process_initack_addrs: checking IPv4 param\n");
2522 }
2523 #endif /* SCTP_DEBUG */
2524 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_ipv4addr_param), (uint8_t *)&addr_store);
2525 if (plen != sizeof(struct sctp_ipv4addr_param) ||
2526 a4p == NULL) {
2527 #ifdef SCTP_DEBUG
2528 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2529 kprintf("process_initack_addrs: invalid IPv4 param length\n");
2530 }
2531 #endif /* SCTP_DEBUG */
2532 return;
2533 }
2534 sin.sin_addr.s_addr = a4p->addr;
2535 sa = (struct sockaddr *)&sin;
2536 } else {
2537 #ifdef SCTP_DEBUG
2538 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2539 kprintf("process_initack_addrs: skipping param type=%xh\n", ptype);
2540 }
2541 #endif /* SCTP_DEBUG */
2542 goto next_addr;
2543 }
2544
2545 /* see if this address really (still) exists */
2546 ifa = sctp_find_ifa_by_addr(sa);
2547 if (ifa == NULL) {
2548 /* address doesn't exist anymore */
2549 int status;
2550 /* are ASCONFs allowed ? */
2551 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) &&
2552 stcb->asoc.peer_supports_asconf) {
2553 /* queue an ASCONF DEL_IP_ADDRESS */
2554 status = sctp_asconf_queue_add_sa(stcb, sa,
2555 SCTP_DEL_IP_ADDRESS);
2556 /*
2557 * if queued ok, and in correct state,
2558 * set the ASCONF timer
2559 */
2560 if (status == 0 &&
2561 SCTP_GET_STATE(&stcb->asoc) ==
2562 SCTP_STATE_OPEN) {
2563 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2564 stcb->sctp_ep, stcb,
2565 stcb->asoc.primary_destination);
2566 }
2567 }
2568 } else {
2569 /* address still exists */
2570 /*
2571 * if subset bound, ep addr's managed by default
2572 * if not doing ASCONF, add the address to the assoc
2573 */
2574 if ((stcb->sctp_ep->sctp_flags &
2575 SCTP_PCB_FLAGS_BOUNDALL) == 0 &&
2576 (stcb->sctp_ep->sctp_flags &
2577 SCTP_PCB_FLAGS_DO_ASCONF) == 0) {
2578 #ifdef SCTP_DEBUG
2579 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2580 kprintf("process_initack_addrs: adding local addr to asoc\n");
2581 }
2582 #endif /* SCTP_DEBUG */
2583 sctp_add_local_addr_assoc(stcb, ifa);
2584 }
2585 }
2586
2587 next_addr:
2588 /* get next parameter */
2589 offset += SCTP_SIZE32(plen);
2590 if ((offset + sizeof(struct sctp_paramhdr)) > length)
2591 return;
2592 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2593 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2594 } /* while */
2595 }
2596
2597 /* FIX ME: need to verify return result for v6 address type if v6 disabled */
2598 /*
2599 * checks to see if a specific address is in the initack address list
2600 * returns 1 if found, 0 if not
2601 */
2602 static uint32_t
2603 sctp_addr_in_initack(struct sctp_tcb *stcb, struct mbuf *m, unsigned int offset,
2604 unsigned int length, struct sockaddr *sa)
2605 {
2606 struct sctp_paramhdr tmp_param, *ph;
2607 uint16_t plen, ptype;
2608 struct sctp_ipv6addr_param addr_store;
2609 struct sockaddr_in *sin;
2610 struct sctp_ipv4addr_param *a4p;
2611 #ifdef INET6
2612 struct sockaddr_in6 *sin6, sin6_tmp;
2613 struct sctp_ipv6addr_param *a6p;
2614 #endif /* INET6 */
2615
2616 if (
2617 #ifdef INET6
2618 (sa->sa_family != AF_INET6) &&
2619 #endif /* INET6 */
2620 (sa->sa_family != AF_INET))
2621 return (0);
2622
2623 #ifdef SCTP_DEBUG
2624 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2625 kprintf("find_initack_addr: starting search for ");
2626 sctp_print_address(sa);
2627 }
2628 #endif /* SCTP_DEBUG */
2629 /* convert to upper bound */
2630 length += offset;
2631
2632 if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2633 #ifdef SCTP_DEBUG
2634 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2635 kprintf("find_initack_addr: invalid offset?\n");
2636 }
2637 #endif /* SCTP_DEBUG */
2638 return (0);
2639 }
2640
2641 /* go through the addresses in the init-ack */
2642 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2643 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2644 while (ph != NULL) {
2645 ptype = ntohs(ph->param_type);
2646 plen = ntohs(ph->param_length);
2647 #ifdef INET6
2648 if (ptype == SCTP_IPV6_ADDRESS && sa->sa_family == AF_INET6) {
2649 /* get the entire IPv6 address param */
2650 #ifdef SCTP_DEBUG
2651 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2652 kprintf("addr_in_initack: checking IPv6 param\n");
2653 }
2654 #endif /* SCTP_DEBUG */
2655 a6p = (struct sctp_ipv6addr_param *)
2656 sctp_m_getptr(m, offset,
2657 sizeof(struct sctp_ipv6addr_param),
2658 (uint8_t *)&addr_store);
2659 if (plen != sizeof(struct sctp_ipv6addr_param) ||
2660 ph == NULL) {
2661 #ifdef SCTP_DEBUG
2662 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2663 kprintf("addr_in_initack: invalid IPv6 param length\n");
2664 }
2665 #endif /* SCTP_DEBUG */
2666 return (0);
2667 }
2668 sin6 = (struct sockaddr_in6 *)sa;
2669 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
2670 /* create a copy and clear scope */
2671 memcpy(&sin6_tmp, sin6,
2672 sizeof(struct sockaddr_in6));
2673 sin6 = &sin6_tmp;
2674 in6_clearscope(&sin6->sin6_addr);
2675 }
2676 if (memcmp(&sin6->sin6_addr, a6p->addr,
2677 sizeof(struct in6_addr)) == 0) {
2678 /* found it */
2679 #ifdef SCTP_DEBUG
2680 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2681 kprintf("addr_in_initack: found IPv6 addr\n");
2682 }
2683 #endif /* SCTP_DEBUG */
2684 return (1);
2685 }
2686 } else
2687 #endif /* INET6 */
2688
2689 if (ptype == SCTP_IPV4_ADDRESS &&
2690 sa->sa_family == AF_INET) {
2691 /* get the entire IPv4 address param */
2692 #ifdef SCTP_DEBUG
2693 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2694 kprintf("addr_in_initack: checking IPv4 param\n");
2695 }
2696 #endif /* SCTP_DEBUG */
2697 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m,
2698 offset, sizeof(struct sctp_ipv4addr_param),
2699 (uint8_t *)&addr_store);
2700 if (plen != sizeof(struct sctp_ipv4addr_param) ||
2701 ph == NULL) {
2702 #ifdef SCTP_DEBUG
2703 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2704 kprintf("addr_in_initack: invalid IPv4 param length\n");
2705 }
2706 #endif /* SCTP_DEBUG */
2707 return (0);
2708 }
2709 sin = (struct sockaddr_in *)sa;
2710 if (sin->sin_addr.s_addr == a4p->addr) {
2711 /* found it */
2712 #ifdef SCTP_DEBUG
2713 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2714 kprintf("addr_in_initack: found IPv4 addr\n");
2715 }
2716 #endif /* SCTP_DEBUG */
2717 return (1);
2718 }
2719 } else {
2720 #ifdef SCTP_DEBUG
2721 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2722 kprintf("addr_in_initack: skipping param type=%xh\n", ptype);
2723 }
2724 #endif /* SCTP_DEBUG */
2725 }
2726 /* get next parameter */
2727 offset += SCTP_SIZE32(plen);
2728 if (offset + sizeof(struct sctp_paramhdr) > length)
2729 return (0);
2730 ph = (struct sctp_paramhdr *)
2731 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
2732 (uint8_t *)&tmp_param);
2733 } /* while */
2734 /* not found! */
2735 #ifdef SCTP_DEBUG
2736 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2737 kprintf("addr_in_initack: not found!\n");
2738 }
2739 #endif /* SCTP_DEBUG */
2740 return (0);
2741 }
2742
2743 /*
2744 * makes sure that the current endpoint local addr list is consistent
2745 * with the new association (eg. subset bound, asconf allowed)
2746 * adds addresses as necessary
2747 */
2748 static void
2749 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset,
2750 int length, struct sockaddr *init_addr)
2751 {
2752 struct sctp_laddr *laddr;
2753
2754 /* go through the endpoint list */
2755 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
2756 /* be paranoid and validate the laddr */
2757 if (laddr->ifa == NULL) {
2758 #ifdef SCTP_DEBUG
2759 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2760 kprintf("check_addr_list_ep: laddr->ifa is NULL");
2761 }
2762 #endif
2763 continue;
2764 }
2765 if (laddr->ifa->ifa_addr == NULL) {
2766 #ifdef SCTP_DEBUG
2767 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2768 kprintf("check_addr_list_ep: laddr->ifa->ifa_addr is NULL");
2769 }
2770 #endif
2771 continue;
2772 }
2773 /* do i have it implicitly? */
2774 if (sctp_cmpaddr(laddr->ifa->ifa_addr, init_addr)) {
2775 #ifdef SCTP_DEBUG
2776 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2777 kprintf("check_address_list_all: skipping ");
2778 sctp_print_address(laddr->ifa->ifa_addr);
2779 }
2780 #endif /* SCTP_DEBUG */
2781 continue;
2782 }
2783 /* check to see if in the init-ack */
2784 if (!sctp_addr_in_initack(stcb, m, offset, length,
2785 laddr->ifa->ifa_addr)) {
2786 /* try to add it */
2787 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa,
2788 SCTP_ADD_IP_ADDRESS);
2789 }
2790 }
2791 }
2792
2793 /*
2794 * makes sure that the current kernel address list is consistent
2795 * with the new association (with all addrs bound)
2796 * adds addresses as necessary
2797 */
2798 static void
2799 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset,
2800 int length, struct sockaddr *init_addr, uint16_t local_scope,
2801 uint16_t site_scope, uint16_t ipv4_scope, uint16_t loopback_scope)
2802 {
2803 struct ifnet *ifn;
2804 struct ifaddr *ifa;
2805
2806 /* go through all our known interfaces */
2807 TAILQ_FOREACH(ifn, &ifnet, if_list) {
2808 if (loopback_scope == 0 && ifn->if_type == IFT_LOOP) {
2809 /* skip loopback interface */
2810 continue;
2811 }
2812
2813 /* go through each interface address */
2814 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
2815 /* do i have it implicitly? */
2816 if (sctp_cmpaddr(ifa->ifa_addr, init_addr)) {
2817 #ifdef SCTP_DEBUG
2818 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2819 kprintf("check_address_list_all: skipping ");
2820 sctp_print_address(ifa->ifa_addr);
2821 }
2822 #endif /* SCTP_DEBUG */
2823 continue;
2824 }
2825 /* check to see if in the init-ack */
2826 if (!sctp_addr_in_initack(stcb, m, offset, length,
2827 ifa->ifa_addr)) {
2828 /* try to add it */
2829 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb,
2830 ifa, SCTP_ADD_IP_ADDRESS);
2831 }
2832 } /* end foreach ifa */
2833 } /* end foreach ifn */
2834 }
2835
2836 /*
2837 * validates an init-ack chunk (from a cookie-echo) with current addresses
2838 * adds addresses from the init-ack into our local address list, if needed
2839 * queues asconf adds/deletes addresses as needed and makes appropriate
2840 * list changes for source address selection
2841 * m, offset: points to the start of the address list in an init-ack chunk
2842 * length: total length of the address params only
2843 * init_addr: address where my INIT-ACK was sent from
2844 */
2845 void
2846 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset,
2847 int length, struct sockaddr *init_addr, uint16_t local_scope,
2848 uint16_t site_scope, uint16_t ipv4_scope, uint16_t loopback_scope)
2849 {
2850
2851 /* process the local addresses in the initack */
2852 sctp_process_initack_addresses(stcb, m, offset, length);
2853
2854 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
2855 /* bound all case */
2856 sctp_check_address_list_all(stcb, m, offset, length, init_addr,
2857 local_scope, site_scope, ipv4_scope, loopback_scope);
2858 } else {
2859 /* subset bound case */
2860 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) {
2861 /* asconf's allowed */
2862 sctp_check_address_list_ep(stcb, m, offset, length,
2863 init_addr);
2864 }
2865 /* else, no asconfs allowed, so what we sent is what we get */
2866 }
2867 }
2868
2869 /*
2870 * sctp_bindx() support
2871 */
2872 uint32_t
2873 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, uint16_t type)
2874 {
2875 struct ifaddr *ifa;
2876
2877 if (sa->sa_len == 0)
2878 return (EINVAL);
2879
2880 ifa = sctp_find_ifa_by_addr(sa);
2881 if (ifa != NULL) {
2882 #ifdef INET6
2883 if (ifa->ifa_addr->sa_family == AF_INET6) {
2884 struct in6_ifaddr *ifa6;
2885 ifa6 = (struct in6_ifaddr *)ifa;
2886 if (IFA6_IS_DEPRECATED(ifa6) ||
2887 (ifa6->ia6_flags & (IN6_IFF_DETACHED |
2888 IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))) {
2889 /* Can't bind a non-existent addr. */
2890 return (EINVAL);
2891 }
2892 }
2893 #endif /* INET6 */
2894 /* add this address */
2895 sctp_addr_mgmt_ep(inp, ifa, type);
2896 } else {
2897 /* invalid address! */
2898 #ifdef SCTP_DEBUG
2899 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2900 kprintf("addr_mgmt_ep_sa: got invalid address!\n");
2901 }
2902 #endif /* SCTP_DEBUG */
2903 return (EADDRNOTAVAIL);
2904 }
2905 return (0);
2906 }
DragonFly BSD