1 /* $NetBSD: sctp_asconf.c,v 1.12 2019/06/25 15:33:56 rjs Exp $ */
2 /* $KAME: sctp_asconf.c,v 1.25 2005/06/16 20:44:24 jinmei 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 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: sctp_asconf.c,v 1.12 2019/06/25 15:33:56 rjs Exp $");
34
35 #ifdef _KERNEL_OPT
36 #include "opt_ipsec.h"
37 #include "opt_inet.h"
38 #include "opt_sctp.h"
39 #endif /* _KERNEL_OPT */
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/malloc.h>
44 #include <sys/mbuf.h>
45 #include <sys/socket.h>
46 #include <sys/socketvar.h>
47 #include <sys/kernel.h>
48 #include <sys/sysctl.h>
49
50 #include <net/if.h>
51 #include <net/if_types.h>
52 #include <net/route.h>
53
54 #include <netinet/in.h>
55 #include <netinet/in_systm.h>
56 #include <netinet/ip.h>
57 #include <netinet/in_pcb.h>
58 #include <netinet/in_var.h>
59 #include <netinet/ip_var.h>
60
61 #ifdef INET6
62 #include <netinet/ip6.h>
63 #include <netinet6/ip6_var.h>
64 #include <netinet6/in6_pcb.h>
65 #include <netinet/icmp6.h>
66 #include <netinet6/nd6.h>
67 #include <netinet6/scope6_var.h>
68 #include <netinet6/nd6.h>
69 #endif /* INET6 */
70
71 #include <netinet/in_pcb.h>
72
73 #include <netinet/sctp_var.h>
74 #include <netinet/sctp_pcb.h>
75 #include <netinet/sctp_header.h>
76 #include <netinet/sctputil.h>
77 #include <netinet/sctp_output.h>
78 #include <netinet/sctp_asconf.h>
79 #include <netinet/sctp_route.h>
80
81 /*
82 * debug flags:
83 * SCTP_DEBUG_ASCONF1: protocol info, general info and errors
84 * SCTP_DEBUG_ASCONF2: detailed info
85 */
86 #ifdef SCTP_DEBUG
87 extern u_int32_t sctp_debug_on;
88 #endif /* SCTP_DEBUG */
89
90 /*
91 * draft-ietf-tsvwg-addip-sctp
92 *
93 * Address management only currently supported
94 * For the bound all case:
95 * the asoc local addr list is always a "DO NOT USE" list
96 * For the subset bound case:
97 * If ASCONFs are allowed:
98 * the endpoint local addr list is the usable address list
99 * the asoc local addr list is the "DO NOT USE" list
100 * If ASCONFs are not allowed:
101 * the endpoint local addr list is the default usable list
102 * the asoc local addr list is the usable address list
103 *
104 * An ASCONF parameter queue exists per asoc which holds the pending
105 * address operations. Lists are updated upon receipt of ASCONF-ACK.
106 *
107 * Deleted addresses are always immediately removed from the lists as
108 * they will (shortly) no longer exist in the kernel. We send ASCONFs
109 * as a courtesy, only if allowed.
110 */
111
112 /*
113 * ASCONF parameter processing
114 * response_required: set if a reply is required (eg. SUCCESS_REPORT)
115 * returns a mbuf to an "error" response parameter or NULL/"success" if ok
116 * FIX: allocating this many mbufs on the fly is pretty inefficient...
117 */
118
119 static struct mbuf *
120 sctp_asconf_success_response(uint32_t id)
121 {
122 struct mbuf *m_reply = NULL;
123 struct sctp_asconf_paramhdr *aph;
124
125 MGET(m_reply, M_DONTWAIT, MT_DATA);
126 if (m_reply == NULL) {
127 #ifdef SCTP_DEBUG
128 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
129 printf("asconf_success_response: couldn't get mbuf!\n");
130 }
131 #endif /* SCTP_DEBUG */
132 return NULL;
133 }
134 aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
135 aph->correlation_id = id;
136 aph->ph.param_type = htons(SCTP_SUCCESS_REPORT);
137 aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr);
138 m_reply->m_len = aph->ph.param_length;
139 aph->ph.param_length = htons(aph->ph.param_length);
140
141 return m_reply;
142 }
143
144 static struct mbuf *
145 sctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t *error_tlv,
146 uint16_t tlv_length)
147 {
148 struct mbuf *m_reply = NULL;
149 struct sctp_asconf_paramhdr *aph;
150 struct sctp_error_cause *error;
151 uint8_t *tlv;
152
153 MGET(m_reply, M_DONTWAIT, MT_DATA);
154 if (m_reply == NULL) {
155 #ifdef SCTP_DEBUG
156 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
157 printf("asconf_error_response: couldn't get mbuf!\n");
158 }
159 #endif /* SCTP_DEBUG */
160 return NULL;
161 }
162 aph = mtod(m_reply, struct sctp_asconf_paramhdr *);
163 error = (struct sctp_error_cause *)(aph + 1);
164
165 aph->correlation_id = id;
166 aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND);
167 error->code = htons(cause);
168 error->length = tlv_length + sizeof(struct sctp_error_cause);
169 aph->ph.param_length = error->length +
170 sizeof(struct sctp_asconf_paramhdr);
171
172 if (aph->ph.param_length > MLEN) {
173 #ifdef SCTP_DEBUG
174 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
175 printf("asconf_error_response: tlv_length (%xh) too big\n",
176 tlv_length);
177 }
178 #endif /* SCTP_DEBUG */
179 sctp_m_freem(m_reply); /* discard */
180 return NULL;
181 }
182
183 if (error_tlv != NULL) {
184 tlv = (uint8_t *)(error + 1);
185 memcpy(tlv, error_tlv, tlv_length);
186 }
187
188 m_reply->m_len = aph->ph.param_length;
189 error->length = htons(error->length);
190 aph->ph.param_length = htons(aph->ph.param_length);
191
192 return m_reply;
193 }
194
195 static struct mbuf *
196 sctp_process_asconf_add_ip(struct sctp_asconf_paramhdr *aph,
197 struct sctp_tcb *stcb, int response_required)
198 {
199 struct mbuf *m_reply = NULL;
200 struct sockaddr_storage sa_store;
201 struct sctp_ipv4addr_param *v4addr;
202 uint16_t param_type, param_length, aparam_length;
203 struct sockaddr *sa;
204 struct sockaddr_in *sin;
205 #ifdef INET6
206 struct sockaddr_in6 *sin6;
207 struct sctp_ipv6addr_param *v6addr;
208 #endif /* INET6 */
209
210 aparam_length = ntohs(aph->ph.param_length);
211 v4addr = (struct sctp_ipv4addr_param *)(aph + 1);
212 #ifdef INET6
213 v6addr = (struct sctp_ipv6addr_param *)(aph + 1);
214 #endif /* INET6 */
215 param_type = ntohs(v4addr->ph.param_type);
216 param_length = ntohs(v4addr->ph.param_length);
217
218 sa = (struct sockaddr *)&sa_store;
219 switch (param_type) {
220 case SCTP_IPV4_ADDRESS:
221 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
222 /* invalid param size */
223 return NULL;
224 }
225 sin = (struct sockaddr_in *)&sa_store;
226 memset(sin, 0, sizeof(*sin));
227 sin->sin_family = AF_INET;
228 sin->sin_len = sizeof(struct sockaddr_in);
229 sin->sin_port = stcb->rport;
230 sin->sin_addr.s_addr = v4addr->addr;
231 #ifdef SCTP_DEBUG
232 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
233 printf("process_asconf_add_ip: adding ");
234 sctp_print_address(sa);
235 }
236 #endif /* SCTP_DEBUG */
237 break;
238 case SCTP_IPV6_ADDRESS:
239 #ifdef INET6
240 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
241 /* invalid param size */
242 return NULL;
243 }
244 sin6 = (struct sockaddr_in6 *)&sa_store;
245 memset(sin6, 0, sizeof(*sin6));
246 sin6->sin6_family = AF_INET6;
247 sin6->sin6_len = sizeof(struct sockaddr_in6);
248 sin6->sin6_port = stcb->rport;
249 memcpy((void *)&sin6->sin6_addr, v6addr->addr,
250 sizeof(struct in6_addr));
251 #ifdef SCTP_DEBUG
252 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
253 printf("process_asconf_add_ip: adding ");
254 sctp_print_address(sa);
255 }
256 #endif /* SCTP_DEBUG */
257 #else
258 /* IPv6 not enabled! */
259 /* FIX ME: currently sends back an invalid param error */
260 m_reply = sctp_asconf_error_response(aph->correlation_id,
261 SCTP_ERROR_INVALID_PARAM, (uint8_t *)aph, aparam_length);
262 #ifdef SCTP_DEBUG
263 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
264 printf("process_asconf_add_ip: v6 disabled- skipping ");
265 sctp_print_address(sa);
266 }
267 #endif /* SCTP_DEBUG */
268 return m_reply;
269 #endif /* INET6 */
270 break;
271 default:
272 m_reply = sctp_asconf_error_response(aph->correlation_id,
273 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph,
274 aparam_length);
275 return m_reply;
276 } /* end switch */
277
278 /* add the address */
279 if (sctp_add_remote_addr(stcb, sa, 0, 6) != 0) {
280 #ifdef SCTP_DEBUG
281 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
282 printf("process_asconf_add_ip: error adding address\n");
283 }
284 #endif /* SCTP_DEBUG */
285 m_reply = sctp_asconf_error_response(aph->correlation_id,
286 SCTP_ERROR_RESOURCE_SHORTAGE, (uint8_t *)aph,
287 aparam_length);
288 } else {
289 /* notify upper layer */
290 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa);
291 if (response_required) {
292 m_reply =
293 sctp_asconf_success_response(aph->correlation_id);
294 }
295 }
296
297 return m_reply;
298 }
299
300 static struct mbuf *
301 sctp_process_asconf_delete_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph,
302 struct sctp_tcb *stcb, int response_required)
303 {
304 struct mbuf *m_reply = NULL;
305 struct sockaddr_storage sa_store, sa_source;
306 struct sctp_ipv4addr_param *v4addr;
307 uint16_t param_type, param_length, aparam_length;
308 struct sockaddr *sa;
309 struct sockaddr_in *sin;
310 struct ip *iph;
311 int result;
312 #ifdef INET6
313 struct sockaddr_in6 *sin6;
314 struct sctp_ipv6addr_param *v6addr;
315 #endif /* INET6 */
316
317 aparam_length = ntohs(aph->ph.param_length);
318 v4addr = (struct sctp_ipv4addr_param *)(aph + 1);
319 #ifdef INET6
320 v6addr = (struct sctp_ipv6addr_param *)(aph + 1);
321 #endif /* INET6 */
322 param_type = ntohs(v4addr->ph.param_type);
323 param_length = ntohs(v4addr->ph.param_length);
324
325 /* get the source IP address for deletion check */
326 iph = mtod(m, struct ip *);
327 if (iph->ip_v == IPVERSION) {
328 /* IPv4 source */
329 sin = (struct sockaddr_in *)&sa_source;
330 memset(sin, 0, sizeof(*sin));
331 sin->sin_family = AF_INET;
332 sin->sin_len = sizeof(struct sockaddr_in);
333 sin->sin_port = stcb->rport;
334 sin->sin_addr.s_addr = iph->ip_src.s_addr;
335 }
336 #ifdef INET6
337 else if (iph->ip_v == (IPV6_VERSION >> 4)) {
338 /* IPv6 source */
339 struct ip6_hdr *ip6;
340
341 sin6 = (struct sockaddr_in6 *)&sa_source;
342 memset(sin6, 0, sizeof(*sin6));
343 sin6->sin6_family = AF_INET6;
344 sin6->sin6_len = sizeof(struct sockaddr_in6);
345 sin6->sin6_port = stcb->rport;
346 ip6 = mtod(m, struct ip6_hdr *);
347 sin6->sin6_addr = ip6->ip6_src;
348 }
349 #endif /* INET6 */
350 else
351 return NULL;
352
353 sa = (struct sockaddr *)&sa_store;
354 switch (param_type) {
355 case SCTP_IPV4_ADDRESS:
356 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
357 /* invalid param size */
358 return NULL;
359 }
360 sin = (struct sockaddr_in *)&sa_store;
361 memset(sin, 0, sizeof(*sin));
362 sin->sin_family = AF_INET;
363 sin->sin_len = sizeof(struct sockaddr_in);
364 sin->sin_port = stcb->rport;
365 sin->sin_addr.s_addr = v4addr->addr;
366 #ifdef SCTP_DEBUG
367 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
368 printf("process_asconf_delete_ip: deleting ");
369 sctp_print_address(sa);
370 }
371 #endif /* SCTP_DEBUG */
372 break;
373 case SCTP_IPV6_ADDRESS:
374 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
375 /* invalid param size */
376 return NULL;
377 }
378 #ifdef INET6
379 sin6 = (struct sockaddr_in6 *)&sa_store;
380 memset(sin6, 0, sizeof(*sin6));
381 sin6->sin6_family = AF_INET6;
382 sin6->sin6_len = sizeof(struct sockaddr_in6);
383 sin6->sin6_port = stcb->rport;
384 memcpy(&sin6->sin6_addr, v6addr->addr,
385 sizeof(struct in6_addr));
386 #ifdef SCTP_DEBUG
387 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
388 printf("process_asconf_delete_ip: deleting ");
389 sctp_print_address(sa);
390 }
391 #endif /* SCTP_DEBUG */
392 #else
393 /* IPv6 not enabled! No "action" needed; just ack it */
394 #ifdef SCTP_DEBUG
395 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
396 printf("process_asconf_delete_ip: v6 disabled- ignoring: ");
397 sctp_print_address(sa);
398 }
399 #endif /* SCTP_DEBUG */
400 /* just respond with a "success" ASCONF-ACK */
401 return NULL;
402 #endif /* INET6 */
403 break;
404 default:
405 m_reply = sctp_asconf_error_response(aph->correlation_id,
406 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph,
407 aparam_length);
408 return m_reply;
409 } /* end switch */
410
411 /* make sure the source address is not being deleted */
412 if ((memcmp(sa, &sa_source, sizeof(struct sockaddr_in)) == 0)
413 #ifdef INET6
414 || (memcmp(sa, &sa_source, sizeof(struct sockaddr_in6)) == 0)
415 #endif /* INET6 */
416 ) {
417 /* trying to delete the source address! */
418 #ifdef SCTP_DEBUG
419 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
420 printf("process_asconf_delete_ip: tried to delete source addr\n");
421 }
422 #endif /* SCTP_DEBUG */
423 m_reply = sctp_asconf_error_response(aph->correlation_id,
424 SCTP_ERROR_DELETE_SOURCE_ADDR, (uint8_t *)aph,
425 aparam_length);
426 return m_reply;
427 }
428
429 /* delete the address */
430 result = sctp_del_remote_addr(stcb, sa);
431 /*
432 * note if result == -2, the address doesn't exist in the asoc
433 * but since it's being deleted anyways, we just ack the delete
434 * -- but this probably means something has already gone awry
435 */
436 if (result == -1) {
437 /* only one address in the asoc */
438 #ifdef SCTP_DEBUG
439 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
440 printf("process_asconf_delete_ip: tried to delete last IP addr!\n");
441 }
442 #endif /* SCTP_DEBUG */
443 m_reply = sctp_asconf_error_response(aph->correlation_id,
444 SCTP_ERROR_DELETE_LAST_ADDR, (uint8_t *)aph,
445 aparam_length);
446 } else {
447 /* notify upper layer */
448 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa);
449 }
450
451 if (response_required) {
452 m_reply = sctp_asconf_success_response(aph->correlation_id);
453 }
454 return m_reply;
455 }
456
457 static struct mbuf *
458 sctp_process_asconf_set_primary(struct sctp_asconf_paramhdr *aph,
459 struct sctp_tcb *stcb, int response_required)
460 {
461 struct mbuf *m_reply = NULL;
462 struct sockaddr_storage sa_store;
463 struct sctp_ipv4addr_param *v4addr;
464 uint16_t param_type, param_length, aparam_length;
465 struct sockaddr *sa;
466 struct sockaddr_in *sin;
467 #ifdef INET6
468 struct sockaddr_in6 *sin6;
469 struct sctp_ipv6addr_param *v6addr;
470 #endif /* INET6 */
471
472 aparam_length = ntohs(aph->ph.param_length);
473 v4addr = (struct sctp_ipv4addr_param *)(aph + 1);
474 #ifdef INET6
475 v6addr = (struct sctp_ipv6addr_param *)(aph + 1);
476 #endif /* INET6 */
477 param_type = ntohs(v4addr->ph.param_type);
478 param_length = ntohs(v4addr->ph.param_length);
479
480 sa = (struct sockaddr *)&sa_store;
481 switch (param_type) {
482 case SCTP_IPV4_ADDRESS:
483 if (param_length != sizeof(struct sctp_ipv4addr_param)) {
484 /* invalid param size */
485 return NULL;
486 }
487 sin = (struct sockaddr_in *)&sa_store;
488 memset(sin, 0, sizeof(*sin));
489 sin->sin_family = AF_INET;
490 sin->sin_len = sizeof(struct sockaddr_in);
491 sin->sin_addr.s_addr = v4addr->addr;
492 #ifdef SCTP_DEBUG
493 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
494 printf("process_asconf_set_primary: ");
495 sctp_print_address(sa);
496 }
497 #endif /* SCTP_DEBUG */
498 break;
499 case SCTP_IPV6_ADDRESS:
500 if (param_length != sizeof(struct sctp_ipv6addr_param)) {
501 /* invalid param size */
502 return NULL;
503 }
504 #ifdef INET6
505 sin6 = (struct sockaddr_in6 *)&sa_store;
506 memset(sin6, 0, sizeof(*sin6));
507 sin6->sin6_family = AF_INET6;
508 sin6->sin6_len = sizeof(struct sockaddr_in6);
509 memcpy((void *)&sin6->sin6_addr, v6addr->addr,
510 sizeof(struct in6_addr));
511 #ifdef SCTP_DEBUG
512 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
513 printf("process_asconf_set_primary: ");
514 sctp_print_address(sa);
515 }
516 #endif /* SCTP_DEBUG */
517 #else
518 /* IPv6 not enabled! No "action" needed; just ack it */
519 #ifdef SCTP_DEBUG
520 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
521 printf("process_asconf_set_primary: v6 disabled- ignoring: ");
522 sctp_print_address(sa);
523 }
524 #endif /* SCTP_DEBUG */
525 /* just respond with a "success" ASCONF-ACK */
526 return NULL;
527 #endif /* INET6 */
528 break;
529 default:
530 m_reply = sctp_asconf_error_response(aph->correlation_id,
531 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph,
532 aparam_length);
533 return m_reply;
534 } /* end switch */
535
536 /* set the primary address */
537 if (sctp_set_primary_addr(stcb, sa, NULL) == 0) {
538 #ifdef SCTP_DEBUG
539 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
540 printf("process_asconf_set_primary: primary address set\n");
541 }
542 #endif /* SCTP_DEBUG */
543 /* notify upper layer */
544 sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa);
545
546 if (response_required) {
547 m_reply = sctp_asconf_success_response(aph->correlation_id);
548 }
549 } else {
550 /* couldn't set the requested primary address! */
551 #ifdef SCTP_DEBUG
552 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
553 printf("process_asconf_set_primary: set primary failed!\n");
554 }
555 #endif /* SCTP_DEBUG */
556 /* must have been an invalid address, so report */
557 m_reply = sctp_asconf_error_response(aph->correlation_id,
558 SCTP_ERROR_UNRESOLVABLE_ADDR, (uint8_t *)aph,
559 aparam_length);
560 }
561
562 return m_reply;
563 }
564
565 /*
566 * handles an ASCONF chunk
567 * if all parameters are processed ok, send a plain (empty) ASCONF-ACK
568 */
569 void
570 sctp_handle_asconf(struct mbuf *m, unsigned int offset, struct sctp_asconf_chunk *cp,
571 struct sctp_tcb *stcb, struct sctp_nets *net)
572 {
573 struct sctp_association *asoc;
574 uint32_t serial_num;
575 struct mbuf *m_ack, *m_result, *m_tail;
576 struct sctp_asconf_ack_chunk *ack_cp;
577 struct sctp_asconf_paramhdr *aph, *ack_aph;
578 struct sctp_ipv6addr_param *p_addr;
579 unsigned int asconf_limit;
580 int error = 0; /* did an error occur? */
581 /* asconf param buffer */
582 static u_int8_t aparam_buf[DEFAULT_PARAM_BUFFER];
583
584 /* verify minimum length */
585 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) {
586 #ifdef SCTP_DEBUG
587 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
588 printf("handle_asconf: chunk too small = %xh\n",
589 ntohs(cp->ch.chunk_length));
590 }
591 #endif /* SCTP_DEBUG */
592 return;
593 }
594
595 asoc = &stcb->asoc;
596 serial_num = ntohl(cp->serial_number);
597
598 if (serial_num == asoc->asconf_seq_in) {
599 /* got a duplicate ASCONF */
600 #ifdef SCTP_DEBUG
601 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
602 printf("handle_asconf: got duplicate serial number = %xh\n",
603 serial_num);
604 }
605 #endif /* SCTP_DEBUG */
606 /* resend last ASCONF-ACK... */
607 sctp_send_asconf_ack(stcb, 1);
608 return;
609 } else if (serial_num != (asoc->asconf_seq_in + 1)) {
610 #ifdef SCTP_DEBUG
611 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
612 printf("handle_asconf: incorrect serial number = %xh (expected next = %xh)\n",
613 serial_num, asoc->asconf_seq_in+1);
614 }
615 #endif /* SCTP_DEBUG */
616 return;
617 }
618
619 /* it's the expected "next" sequence number, so process it */
620 asoc->asconf_seq_in = serial_num; /* update sequence */
621 /* get length of all the param's in the ASCONF */
622 asconf_limit = offset + ntohs(cp->ch.chunk_length);
623 #ifdef SCTP_DEBUG
624 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
625 printf("handle_asconf: asconf_limit=%u, sequence=%xh\n",
626 asconf_limit, serial_num);
627 }
628 #endif /* SCTP_DEBUG */
629 if (asoc->last_asconf_ack_sent != NULL) {
630 /* free last ASCONF-ACK message sent */
631 sctp_m_freem(asoc->last_asconf_ack_sent);
632 asoc->last_asconf_ack_sent = NULL;
633 }
634 MGETHDR(m_ack, M_DONTWAIT, MT_DATA);
635 if (m_ack == NULL) {
636 #ifdef SCTP_DEBUG
637 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
638 printf("handle_asconf: couldn't get mbuf!\n");
639 }
640 #endif /* SCTP_DEBUG */
641 return;
642 }
643 m_tail = m_ack; /* current reply chain's tail */
644
645 /* fill in ASCONF-ACK header */
646 ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *);
647 ack_cp->ch.chunk_type = SCTP_ASCONF_ACK;
648 ack_cp->ch.chunk_flags = 0;
649 ack_cp->serial_number = htonl(serial_num);
650 /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */
651 m_ack->m_len = sizeof(struct sctp_asconf_ack_chunk);
652 ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk);
653 m_ack->m_pkthdr.len = sizeof(struct sctp_asconf_ack_chunk);
654
655 /* skip the lookup address parameter */
656 offset += sizeof(struct sctp_asconf_chunk);
657 p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *)&aparam_buf);
658 if (p_addr == NULL) {
659 #ifdef SCTP_DEBUG
660 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
661 printf("handle_asconf: couldn't get lookup addr!\n");
662 }
663 #endif /* SCTP_DEBUG */
664
665 /* respond with a missing/invalid mandatory parameter error */
666 return;
667 }
668 /* param_length is already validated in process_control... */
669 offset += ntohs(p_addr->ph.param_length); /* skip lookup addr */
670
671 /* get pointer to first asconf param in ASCONF */
672 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *)&aparam_buf);
673 /* get pointer to first asconf param in ASCONF-ACK */
674 if (aph == NULL) {
675 printf("Gak in asconf\n");
676 return;
677 }
678 ack_aph = (struct sctp_asconf_paramhdr *)(mtod(m_ack, vaddr_t) + sizeof(struct sctp_asconf_ack_chunk));
679 if (ack_aph == NULL) {
680 printf("Gak in asconf2\n");
681 return;
682 }
683
684 /* process through all parameters */
685 while (aph != NULL) {
686 unsigned int param_length, param_type;
687
688 param_type = ntohs(aph->ph.param_type);
689 param_length = ntohs(aph->ph.param_length);
690 if (offset + param_length > asconf_limit) {
691 /* parameter goes beyond end of chunk! */
692 sctp_m_freem(m_ack);
693 return;
694 }
695 m_result = NULL;
696
697 if (param_length > sizeof(aparam_buf)) {
698 #ifdef SCTP_DEBUG
699 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
700 printf("handle_asconf: param length (%u) larger than buffer size!\n", param_length);
701 }
702 #endif /* SCTP_DEBUG */
703 sctp_m_freem(m_ack);
704 return;
705 }
706 if (param_length <= sizeof(struct sctp_paramhdr)) {
707 #ifdef SCTP_DEBUG
708 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
709 printf("handle_asconf: param length (%u) too short\n", param_length);
710 }
711 #endif /* SCTP_DEBUG */
712 sctp_m_freem(m_ack);
713 }
714
715 /* get the entire parameter */
716 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
717 if (aph == NULL) {
718 printf("Gag\n");
719 sctp_m_freem(m_ack);
720 return;
721 }
722 switch (param_type) {
723 case SCTP_ADD_IP_ADDRESS:
724 asoc->peer_supports_asconf = 1;
725 m_result = sctp_process_asconf_add_ip(aph, stcb, error);
726 break;
727 case SCTP_DEL_IP_ADDRESS:
728 asoc->peer_supports_asconf = 1;
729 m_result = sctp_process_asconf_delete_ip(m, aph, stcb,
730 error);
731 break;
732 case SCTP_ERROR_CAUSE_IND:
733 /* not valid in an ASCONF chunk */
734 break;
735 case SCTP_SET_PRIM_ADDR:
736 asoc->peer_supports_asconf_setprim = 1;
737 m_result = sctp_process_asconf_set_primary(aph, stcb,
738 error);
739 break;
740 case SCTP_SUCCESS_REPORT:
741 /* not valid in an ASCONF chunk */
742 break;
743 case SCTP_ULP_ADAPTION:
744 /* FIX */
745 break;
746 default:
747 if ((param_type & 0x8000) == 0) {
748 /* Been told to STOP at this param */
749 asconf_limit = offset;
750 /* FIX FIX - We need to call sctp_arethere_unrecognized_parameters()
751 * to get a operr and send it for any param's with the
752 * 0x4000 bit set OR do it here ourselves... note we still
753 * must STOP if the 0x8000 bit is clear.
754 */
755 }
756 /* unknown/invalid param type */
757 break;
758 } /* switch */
759
760 /* add any (error) result to the reply mbuf chain */
761 if (m_result != NULL) {
762 #ifdef SCTP_DEBUG
763 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
764 printf("handle_asconf: adding reply...\n");
765 }
766 #endif /* SCTP_DEBUG */
767 m_tail->m_next = m_result;
768 m_tail = m_result;
769 /* update lengths, make sure it's aligned too */
770 m_result->m_len = SCTP_SIZE32(m_result->m_len);
771 m_ack->m_pkthdr.len += m_result->m_len;
772 ack_cp->ch.chunk_length += m_result->m_len;
773 /* set flag to force success reports */
774 error = 1;
775 }
776
777 offset += SCTP_SIZE32(param_length);
778 /* update remaining ASCONF message length to process */
779 if (offset >= asconf_limit) {
780 /* no more data in the mbuf chain */
781 break;
782 }
783 /* get pointer to next asconf param */
784 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
785 sizeof(struct sctp_asconf_paramhdr),
786 (uint8_t *)&aparam_buf);
787 if (aph == NULL) {
788 /* can't get an asconf paramhdr */
789 #ifdef SCTP_DEBUG
790 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
791 printf("handle_asconf: can't get asconf param hdr!\n");
792 }
793 #endif /* SCTP_DEBUG */
794 /* FIX ME - add error here... */
795 }
796 } /* while */
797
798 ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length);
799 /* save the ASCONF-ACK reply */
800 asoc->last_asconf_ack_sent = m_ack;
801 /* and send (a new one) it out... */
802 sctp_send_asconf_ack(stcb, 0);
803 }
804
805 /*
806 * does the address match?
807 * returns 0 if not, 1 if so
808 */
809 static uint32_t
810 sctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa)
811 {
812 #ifdef INET6
813 if (sa->sa_family == AF_INET6) {
814 /* IPv6 sa address */
815 /* XXX scopeid */
816 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
817 if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) &&
818 (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr,
819 sizeof(struct in6_addr)) == 0)) {
820 return (1);
821 }
822 } else
823 #endif /* INET6 */
824 if (sa->sa_family == AF_INET) {
825 /* IPv4 sa address */
826 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
827 if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) &&
828 (memcmp(&aa->ap.addrp.addr, &sin->sin_addr,
829 sizeof(struct in_addr)) == 0)) {
830 return (1);
831 }
832 }
833 return (0);
834 }
835
836 /*
837 * Cleanup for non-responded/OP ERR'd ASCONF
838 */
839 void
840 sctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net)
841 {
842 #ifdef SCTP_DEBUG
843 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
844 printf("asconf_cleanup: marking peer ASCONF incapable and cleaning up\n");
845 }
846 #endif /* SCTP_DEBUG */
847 /* mark peer as ASCONF incapable */
848 stcb->asoc.peer_supports_asconf = 0;
849 stcb->asoc.peer_supports_asconf_setprim = 0;
850 /*
851 * clear out any existing asconfs going out
852 */
853 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net);
854 stcb->asoc.asconf_seq_out++;
855 /* remove the old ASCONF on our outbound queue */
856 sctp_toss_old_asconf(stcb);
857 }
858
859 /*
860 * process an ADD/DELETE IP ack from peer
861 * ifa: corresponding ifaddr to the address being added/deleted
862 * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS
863 * flag: 1=success, 0=failure
864 */
865 static void
866 sctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct ifaddr *addr,
867 uint16_t type, uint32_t flag)
868 {
869
870 /*
871 * do the necessary asoc list work-
872 * if we get a failure indication, leave the address on the
873 * "do not use" asoc list
874 * if we get a success indication, remove the address from
875 * the list
876 */
877 /*
878 * Note: this will only occur for ADD_IP_ADDRESS, since
879 * DEL_IP_ADDRESS is never actually added to the list...
880 */
881 if (flag) {
882 /* success case, so remove from the list */
883 sctp_del_local_addr_assoc(stcb, addr);
884 }
885 /* else, leave it on the list */
886 }
887
888 /*
889 * add an asconf add/delete IP address parameter to the queue
890 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR
891 * returns 0 if completed, non-zero if not completed
892 * NOTE: if adding, but delete already scheduled (and not yet
893 * sent out), simply remove from queue. Same for deleting
894 * an address already scheduled for add. If a duplicate
895 * operation is found, ignore the new one.
896 */
897 static uint32_t
898 sctp_asconf_queue_add(struct sctp_tcb *stcb, struct ifaddr *ifa, uint16_t type)
899 {
900 struct sctp_asconf_addr *aa, *aa_next;
901 #ifdef SCTP_DEBUG
902 char buf[128]; /* for address in string format */
903 #endif /* SCTP_DEBUG */
904
905 /* see if peer supports ASCONF */
906 if (stcb->asoc.peer_supports_asconf == 0) {
907 #ifdef SCTP_DEBUG
908 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
909 printf("asconf_queue_add: peer doesn't support ASCONF\n");
910 }
911 #endif /* SCTP_DEBUG */
912 return (-1);
913 }
914
915 /* make sure the request isn't already in the queue */
916 for (aa=TAILQ_FIRST(&stcb->asoc.asconf_queue); aa!=NULL; aa=aa_next) {
917 aa_next = TAILQ_NEXT(aa, next);
918 /* address match? */
919 if (sctp_asconf_addr_match(aa, ifa->ifa_addr) == 0)
920 continue;
921 /* is the request already in queue (sent or not) */
922 if (aa->ap.aph.ph.param_type == type) {
923 #ifdef SCTP_DEBUG
924 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
925 printf("asconf_queue_add: request already exists\n");
926 }
927 #endif /* SCTP_DEBUG */
928 return (-1);
929 }
930 /* is the negative request already in queue, and not sent */
931 if (aa->sent == 0 &&
932 /* add requested, delete already queued */
933 ((type == SCTP_ADD_IP_ADDRESS &&
934 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) ||
935 /* delete requested, add already queued */
936 (type == SCTP_DEL_IP_ADDRESS &&
937 aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS))) {
938 /* delete the existing entry in the queue */
939 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
940 /* take the entry off the appropriate list */
941 sctp_asconf_addr_mgmt_ack(stcb, aa->ifa, type, 1);
942 /* free the entry */
943 free(aa, M_PCB);
944
945 #ifdef SCTP_DEBUG
946 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
947 printf("asconf_queue_add: removing 'opposite' queued request\n");
948 }
949 #endif /* SCTP_DEBUG */
950 return (-1);
951 }
952 } /* for each aa */
953
954 /* adding new request to the queue */
955 aa = malloc(sizeof(*aa), M_PCB, M_NOWAIT);
956 if (aa == NULL) {
957 /* didn't get memory */
958 #ifdef SCTP_DEBUG
959 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
960 printf("asconf_queue_add: failed to get memory!\n");
961 }
962 #endif /* SCTP_DEBUG */
963 return (-1);
964 }
965 /* fill in asconf address parameter fields */
966 /* top level elements are "networked" during send */
967 aa->ap.aph.ph.param_type = type;
968 aa->ifa = ifa;
969 /* correlation_id filled in during send routine later... */
970 if (ifa->ifa_addr->sa_family == AF_INET6) {
971 /* IPv6 address */
972 #ifdef SCTP_DEBUG
973 char ip6buf[INET6_ADDRSTRLEN];
974 #endif
975 struct sockaddr_in6 *sin6;
976
977 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
978 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
979 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
980 aa->ap.aph.ph.param_length =
981 sizeof(struct sctp_asconf_paramhdr) +
982 sizeof(struct sctp_ipv6addr_param);
983 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
984 sizeof(struct in6_addr));
985 #ifdef SCTP_DEBUG
986 strlcpy(buf, IN6_PRINT(ip6buf, &sin6->sin6_addr), sizeof(buf));
987 #endif /* SCTP_DEBUG */
988
989 } else if (ifa->ifa_addr->sa_family == AF_INET) {
990 /* IPv4 address */
991 struct sockaddr_in *sin = (struct sockaddr_in *)ifa->ifa_addr;
992 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
993 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
994 aa->ap.aph.ph.param_length =
995 sizeof(struct sctp_asconf_paramhdr) +
996 sizeof(struct sctp_ipv4addr_param);
997 memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
998 sizeof(struct in_addr));
999 #ifdef SCTP_DEBUG
1000 strlcpy(buf, inet_ntoa(sin->sin_addr), sizeof(buf));
1001 #endif /* SCTP_DEBUG */
1002 } else {
1003 /* invalid family! */
1004 return (-1);
1005 }
1006 aa->sent = 0; /* clear sent flag */
1007
1008 /*
1009 * if we are deleting an address it should go out last
1010 * otherwise, add it to front of the pending queue
1011 */
1012 if (type == SCTP_ADD_IP_ADDRESS) {
1013 /* add goes to the front of the queue */
1014 TAILQ_INSERT_HEAD(&stcb->asoc.asconf_queue, aa, next);
1015 #ifdef SCTP_DEBUG
1016 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1017 printf("asconf_queue_add: appended asconf ADD_IP_ADDRESS: %s\n", buf);
1018 }
1019 #endif /* SCTP_DEBUG */
1020 } else {
1021 /* delete and set primary goes to the back of the queue */
1022 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1023 #ifdef SCTP_DEBUG
1024 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1025 if (type == SCTP_DEL_IP_ADDRESS) {
1026 printf("asconf_queue_add: inserted asconf DEL_IP_ADDRESS: %s\n", buf);
1027 } else {
1028 printf("asconf_queue_add: inserted asconf SET_PRIM_ADDR: %s\n", buf);
1029 }
1030 }
1031 #endif /* SCTP_DEBUG */
1032 }
1033
1034 return (0);
1035 }
1036
1037 /*
1038 * add an asconf add/delete IP address parameter to the queue by addr
1039 * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR
1040 * returns 0 if completed, non-zero if not completed
1041 * NOTE: if adding, but delete already scheduled (and not yet
1042 * sent out), simply remove from queue. Same for deleting
1043 * an address already scheduled for add. If a duplicate
1044 * operation is found, ignore the new one.
1045 */
1046 static uint32_t
1047 sctp_asconf_queue_add_sa(struct sctp_tcb *stcb, struct sockaddr *sa,
1048 uint16_t type)
1049 {
1050 struct sctp_asconf_addr *aa, *aa_next;
1051
1052 /* see if peer supports ASCONF */
1053 if (stcb->asoc.peer_supports_asconf == 0) {
1054 #ifdef SCTP_DEBUG
1055 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1056 printf("asconf_queue_add_sa: peer doesn't support ASCONF\n");
1057 }
1058 #endif /* SCTP_DEBUG */
1059 return (-1);
1060 }
1061
1062 /* make sure the request isn't already in the queue */
1063 for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL;
1064 aa = aa_next) {
1065 aa_next = TAILQ_NEXT(aa, next);
1066 /* address match? */
1067 if (sctp_asconf_addr_match(aa, sa) == 0)
1068 continue;
1069 /* is the request already in queue (sent or not) */
1070 if (aa->ap.aph.ph.param_type == type) {
1071 #ifdef SCTP_DEBUG
1072 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1073 printf("asconf_queue_add_sa: request already exists\n");
1074 }
1075 #endif /* SCTP_DEBUG */
1076 return (-1);
1077 }
1078
1079 /* is the negative request already in queue, and not sent */
1080 if (aa->sent == 1)
1081 continue;
1082 if (type == SCTP_ADD_IP_ADDRESS &&
1083 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
1084 /* add requested, delete already queued */
1085
1086 /* delete the existing entry in the queue */
1087 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1088 /* free the entry */
1089 free(aa, M_PCB);
1090 #ifdef SCTP_DEBUG
1091 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1092 printf("asconf_queue_add_sa: removing queued delete request\n");
1093 }
1094 #endif /* SCTP_DEBUG */
1095 return (-1);
1096 } else if (type == SCTP_DEL_IP_ADDRESS &&
1097 aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) {
1098 /* delete requested, add already queued */
1099
1100 /* delete the existing entry in the queue */
1101 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next);
1102 /* take the entry off the appropriate list */
1103 sctp_asconf_addr_mgmt_ack(stcb, aa->ifa, type, 1);
1104 /* free the entry */
1105 free(aa, M_PCB);
1106 #ifdef SCTP_DEBUG
1107 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1108 printf("asconf_queue_add_sa: removing queued add request\n");
1109 }
1110 #endif /* SCTP_DEBUG */
1111 return (-1);
1112 }
1113 } /* for each aa */
1114
1115 /* adding new request to the queue */
1116 aa = malloc(sizeof(*aa), M_PCB, M_NOWAIT);
1117 if (aa == NULL) {
1118 /* didn't get memory */
1119 #ifdef SCTP_DEBUG
1120 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1121 printf("asconf_queue_add_sa: failed to get memory!\n");
1122 }
1123 #endif /* SCTP_DEBUG */
1124 return (-1);
1125 }
1126 /* fill in asconf address parameter fields */
1127 /* top level elements are "networked" during send */
1128 aa->ap.aph.ph.param_type = type;
1129 aa->ifa = sctp_find_ifa_by_addr(sa);
1130 /* correlation_id filled in during send routine later... */
1131 if (sa->sa_family == AF_INET6) {
1132 /* IPv6 address */
1133 struct sockaddr_in6 *sin6;
1134
1135 sin6 = (struct sockaddr_in6 *)sa;
1136 aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS;
1137 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param));
1138 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param);
1139 memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr,
1140 sizeof(struct in6_addr));
1141 } else if (sa->sa_family == AF_INET) {
1142 /* IPv4 address */
1143 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
1144 aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS;
1145 aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param));
1146 aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param);
1147 memcpy(&aa->ap.addrp.addr, &sin->sin_addr,
1148 sizeof(struct in_addr));
1149 } else {
1150 /* invalid family! */
1151 return (-1);
1152 }
1153 aa->sent = 0; /* clear sent flag */
1154
1155 /*
1156 * if we are deleting an address it should go out last
1157 * otherwise, add it to front of the pending queue
1158 */
1159 if (type == SCTP_ADD_IP_ADDRESS) {
1160 /* add goes to the front of the queue */
1161 TAILQ_INSERT_HEAD(&stcb->asoc.asconf_queue, aa, next);
1162 #ifdef SCTP_DEBUG
1163 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1164 printf("asconf_queue_add_sa: appended asconf ADD_IP_ADDRESS\n");
1165 }
1166 #endif /* SCTP_DEBUG */
1167 } else {
1168 /* delete and set primary goes to the back of the queue */
1169 TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next);
1170 #ifdef SCTP_DEBUG
1171 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1172 if (type == SCTP_DEL_IP_ADDRESS) {
1173 printf("asconf_queue_add_sa: inserted asconf DEL_IP_ADDRESS\n");
1174 } else {
1175 printf("asconf_queue_add_sa: inserted asconf SET_PRIM_ADDR\n");
1176 }
1177 }
1178 #endif /* SCTP_DEBUG */
1179 }
1180
1181 return (0);
1182 }
1183
1184 /*
1185 * find a specific asconf param on our "sent" queue
1186 */
1187 static struct sctp_asconf_addr *
1188 sctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id)
1189 {
1190 struct sctp_asconf_addr *aa;
1191
1192 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
1193 if (aa->ap.aph.correlation_id == correlation_id &&
1194 aa->sent == 1) {
1195 /* found it */
1196 return (aa);
1197 }
1198 }
1199 /* didn't find it */
1200 return (NULL);
1201 }
1202
1203 /*
1204 * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter
1205 * and do notifications based on the error response
1206 */
1207 static void
1208 sctp_asconf_process_error(struct sctp_tcb *stcb,
1209 struct sctp_asconf_paramhdr *aph)
1210 {
1211 struct sctp_error_cause *eh;
1212 struct sctp_paramhdr *ph;
1213 uint16_t param_type;
1214 uint16_t error_code;
1215
1216 eh = (struct sctp_error_cause *)(aph + 1);
1217 ph = (struct sctp_paramhdr *)(eh + 1);
1218 /* validate lengths */
1219 if (htons(eh->length) + sizeof(struct sctp_error_cause) >
1220 htons(aph->ph.param_length)) {
1221 /* invalid error cause length */
1222 #ifdef SCTP_DEBUG
1223 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1224 printf("asconf_process_error: cause element too long\n");
1225 }
1226 #endif /* SCTP_DEBUG */
1227 return;
1228 }
1229 if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) >
1230 htons(eh->length)) {
1231 /* invalid included TLV length */
1232 #ifdef SCTP_DEBUG
1233 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1234 printf("asconf_process_error: included TLV too long\n");
1235 }
1236 #endif /* SCTP_DEBUG */
1237 return;
1238 }
1239
1240 /* which error code ? */
1241 error_code = ntohs(eh->code);
1242 param_type = ntohs(aph->ph.param_type);
1243 /* FIX: this should go back up the REMOTE_ERROR ULP notify */
1244 switch (error_code) {
1245 case SCTP_ERROR_RESOURCE_SHORTAGE:
1246 /* we allow ourselves to "try again" for this error */
1247 break;
1248 default:
1249 /* peer can't handle it... */
1250 switch (param_type) {
1251 case SCTP_ADD_IP_ADDRESS:
1252 case SCTP_DEL_IP_ADDRESS:
1253 stcb->asoc.peer_supports_asconf = 0;
1254 break;
1255 case SCTP_SET_PRIM_ADDR:
1256 stcb->asoc.peer_supports_asconf_setprim = 0;
1257 break;
1258 default:
1259 break;
1260 }
1261 }
1262 }
1263
1264 /*
1265 * process an asconf queue param
1266 * aparam: parameter to process, will be removed from the queue
1267 * flag: 1=success, 0=failure
1268 */
1269 static void
1270 sctp_asconf_process_param_ack(struct sctp_tcb *stcb,
1271 struct sctp_asconf_addr *aparam, uint32_t flag)
1272 {
1273 uint16_t param_type;
1274
1275 /* process this param */
1276 param_type = aparam->ap.aph.ph.param_type;
1277 #ifdef SCTP_DEBUG
1278 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1279 printf("process_param_ack: handling asconf parameter type=%xh\n", param_type);
1280 }
1281 #endif /* SCTP_DEBUG */
1282 switch (param_type) {
1283 case SCTP_ADD_IP_ADDRESS:
1284 #ifdef SCTP_DEBUG
1285 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1286 printf("process_param_ack: added IP address\n");
1287 }
1288 #endif /* SCTP_DEBUG */
1289 sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, param_type, flag);
1290 break;
1291 case SCTP_DEL_IP_ADDRESS:
1292 #ifdef SCTP_DEBUG
1293 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1294 printf("process_param_ack: deleted IP address\n");
1295 }
1296 #endif /* SCTP_DEBUG */
1297 /* nothing really to do... lists already updated */
1298 break;
1299 case SCTP_SET_PRIM_ADDR:
1300 /* nothing to do... peer may start using this addr */
1301 if (flag == 0)
1302 stcb->asoc.peer_supports_asconf_setprim = 0;
1303 break;
1304 default:
1305 /* should NEVER happen */
1306 break;
1307 } /* switch */
1308
1309 /* remove the param and free it */
1310 TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next);
1311 free(aparam, M_PCB);
1312 }
1313
1314 /*
1315 * cleanup from a bad asconf ack parameter
1316 */
1317 static void
1318 sctp_asconf_ack_clear(struct sctp_tcb *stcb)
1319 {
1320 /* assume peer doesn't really know how to do asconfs */
1321 stcb->asoc.peer_supports_asconf = 0;
1322 stcb->asoc.peer_supports_asconf_setprim = 0;
1323 /* XXX we could free the pending queue here */
1324 }
1325
1326 void
1327 sctp_handle_asconf_ack(struct mbuf *m, int offset,
1328 struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb,
1329 struct sctp_nets *net)
1330 {
1331 struct sctp_association *asoc;
1332 uint32_t serial_num;
1333 uint16_t ack_length;
1334 struct sctp_asconf_paramhdr *aph;
1335 struct sctp_asconf_addr *aa, *aa_next;
1336 uint32_t last_error_id = 0; /* last error correlation id */
1337 uint32_t id;
1338 struct sctp_asconf_addr *ap;
1339 /* asconf param buffer */
1340 static u_int8_t aparam_buf[DEFAULT_PARAM_BUFFER];
1341
1342 /* verify minimum length */
1343 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) {
1344 #ifdef SCTP_DEBUG
1345 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1346 printf("handle_asconf_ack: chunk too small = %xh\n",
1347 ntohs(cp->ch.chunk_length));
1348 }
1349 #endif /* SCTP_DEBUG */
1350 return;
1351 }
1352
1353 asoc = &stcb->asoc;
1354 serial_num = ntohl(cp->serial_number);
1355
1356 /*
1357 * NOTE: we may want to handle this differently- currently, we
1358 * will abort when we get an ack for the expected serial number + 1
1359 * (eg. we didn't send it), process an ack normally if it is the
1360 * expected serial number, and re-send the previous ack for *ALL*
1361 * other serial numbers
1362 */
1363
1364 /*
1365 * if the serial number is the next expected, but I didn't send it,
1366 * abort the asoc, since someone probably just hijacked us...
1367 */
1368 if (serial_num == (asoc->asconf_seq_out + 1)) {
1369 sctp_abort_an_association(stcb->sctp_ep, stcb,
1370 SCTP_ERROR_ILLEGAL_ASCONF_ACK, NULL);
1371 #ifdef SCTP_DEBUG
1372 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1373 printf("handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n");
1374 }
1375 #endif /* SCTP_DEBUG */
1376 return;
1377 }
1378
1379 if (serial_num != asoc->asconf_seq_out) {
1380 /* got a duplicate/unexpected ASCONF-ACK */
1381 #ifdef SCTP_DEBUG
1382 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1383 printf("handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", serial_num, asoc->asconf_seq_out);
1384 }
1385 #endif /* SCTP_DEBUG */
1386 return;
1387 }
1388 /* stop our timer */
1389 sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net);
1390
1391 /* process the ASCONF-ACK contents */
1392 ack_length = ntohs(cp->ch.chunk_length) -
1393 sizeof(struct sctp_asconf_ack_chunk);
1394 offset += sizeof(struct sctp_asconf_ack_chunk);
1395 /* process through all parameters */
1396 while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) {
1397 unsigned int param_length, param_type;
1398
1399 /* get pointer to next asconf parameter */
1400 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset,
1401 sizeof(struct sctp_asconf_paramhdr), aparam_buf);
1402 if (aph == NULL) {
1403 /* can't get an asconf paramhdr */
1404 sctp_asconf_ack_clear(stcb);
1405 return;
1406 }
1407 param_type = ntohs(aph->ph.param_type);
1408 param_length = ntohs(aph->ph.param_length);
1409 if (param_length > ack_length) {
1410 sctp_asconf_ack_clear(stcb);
1411 return;
1412 }
1413 if (param_length < sizeof(struct sctp_paramhdr)) {
1414 sctp_asconf_ack_clear(stcb);
1415 return;
1416 }
1417
1418 /* get the complete parameter... */
1419 if (param_length > sizeof(aparam_buf)) {
1420 #ifdef SCTP_DEBUG
1421 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1422 printf("param length (%u) larger than buffer size!\n", param_length);
1423 }
1424 #endif /* SCTP_DEBUG */
1425 sctp_asconf_ack_clear(stcb);
1426 return;
1427 }
1428 aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf);
1429 if (aph == NULL) {
1430 sctp_asconf_ack_clear(stcb);
1431 return;
1432 }
1433 /* correlation_id is transparent to peer, no ntohl needed */
1434 id = aph->correlation_id;
1435
1436 switch (param_type) {
1437 case SCTP_ERROR_CAUSE_IND:
1438 last_error_id = id;
1439 /* find the corresponding asconf param in our queue */
1440 ap = sctp_asconf_find_param(stcb, id);
1441 if (ap == NULL) {
1442 /* hmm... can't find this in our queue! */
1443 break;
1444 }
1445 /* process the parameter, failed flag */
1446 sctp_asconf_process_param_ack(stcb, ap, 0);
1447 /* process the error response */
1448 sctp_asconf_process_error(stcb, aph);
1449 break;
1450 case SCTP_SUCCESS_REPORT:
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, success flag */
1458 sctp_asconf_process_param_ack(stcb, ap, 1);
1459 break;
1460 default:
1461 break;
1462 } /* switch */
1463
1464 /* update remaining ASCONF-ACK message length to process */
1465 ack_length -= SCTP_SIZE32(param_length);
1466 if (ack_length <= 0) {
1467 /* no more data in the mbuf chain */
1468 break;
1469 }
1470 offset += SCTP_SIZE32(param_length);
1471 } /* while */
1472
1473 /*
1474 * if there are any "sent" params still on the queue, these are
1475 * implicitly "success", or "failed" (if we got an error back)
1476 * ... so process these appropriately
1477 *
1478 * we assume that the correlation_id's are monotonically increasing
1479 * beginning from 1 and that we don't have *that* many outstanding
1480 * at any given time
1481 */
1482 if (last_error_id == 0)
1483 last_error_id--; /* set to "max" value */
1484 for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL;
1485 aa = aa_next) {
1486 aa_next = TAILQ_NEXT(aa, next);
1487 if (aa->sent == 1) {
1488 /*
1489 * implicitly successful or failed
1490 * if correlation_id < last_error_id, then success
1491 * else, failure
1492 */
1493 if (aa->ap.aph.correlation_id < last_error_id)
1494 sctp_asconf_process_param_ack(stcb, aa,
1495 SCTP_SUCCESS_REPORT);
1496 else
1497 sctp_asconf_process_param_ack(stcb, aa,
1498 SCTP_ERROR_CAUSE_IND);
1499 } else {
1500 /*
1501 * since we always process in order (FIFO queue)
1502 * if we reach one that hasn't been sent, the
1503 * rest should not have been sent either.
1504 * so, we're done...
1505 */
1506 break;
1507 }
1508 }
1509
1510 /* update the next sequence number to use */
1511 asoc->asconf_seq_out++;
1512 /* remove the old ASCONF on our outbound queue */
1513 sctp_toss_old_asconf(stcb);
1514 /* clear the sent flag to allow new ASCONFs */
1515 asoc->asconf_sent = 0;
1516 if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) {
1517 /* we have more params, so restart our timer */
1518 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep,
1519 stcb, net);
1520 }
1521 }
1522
1523 /* is this an interface that we care about at all? */
1524 static uint32_t
1525 sctp_is_desired_interface_type(struct ifaddr *ifa)
1526 {
1527 int result;
1528
1529 /* check the interface type to see if it's one we care about */
1530 switch (ifa->ifa_ifp->if_type) {
1531 case IFT_ETHER:
1532 case IFT_ISO88023:
1533 case IFT_ISO88025:
1534 case IFT_STARLAN:
1535 case IFT_P10:
1536 case IFT_P80:
1537 case IFT_HY:
1538 case IFT_FDDI:
1539 case IFT_PPP:
1540 case IFT_XETHER:
1541 case IFT_SLIP:
1542 case IFT_GIF:
1543 result = 1;
1544 break;
1545 default:
1546 #ifdef SCTP_DEBUG
1547 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1548 printf("ignoring interface type = %u\n",
1549 ifa->ifa_ifp->if_type);
1550 }
1551 #endif /* SCTP_DEBUG */
1552 result = 0;
1553 } /* end switch */
1554
1555 return (result);
1556 }
1557
1558 static uint32_t
1559 sctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa)
1560 {
1561 struct sockaddr_in6 *sin6;
1562 const struct sockaddr_in6 *net6;
1563 struct sctp_nets *net;
1564
1565 if (sa->sa_family != AF_INET6) {
1566 /* wrong family */
1567 return (0);
1568 }
1569
1570 sin6 = (struct sockaddr_in6 *)sa;
1571 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) {
1572 /* not link local address */
1573 return (0);
1574 }
1575 /* hunt through our destination nets list for this scope_id */
1576 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1577 if ((rtcache_getdst(&net->ro))->sa_family !=
1578 AF_INET6)
1579 continue;
1580 net6 = (const struct sockaddr_in6 *)rtcache_getdst(&net->ro);
1581 if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0)
1582 continue;
1583 if (sctp_is_same_scope(sin6, net6)) {
1584 /* found one */
1585 return (1);
1586 }
1587 }
1588 /* didn't find one */
1589 return (0);
1590 }
1591
1592 /*
1593 * address management functions
1594 */
1595 static void
1596 sctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1597 struct ifaddr *ifa, uint16_t type)
1598 {
1599 int status;
1600 #ifdef SCTP_DEBUG
1601 char buf[128]; /* for address in string format */
1602 #endif /* SCTP_DEBUG */
1603
1604 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 &&
1605 (inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0) {
1606 /* subset bound, no ASCONF allowed case, so ignore */
1607 return;
1608 }
1609
1610 /*
1611 * note: we know this is not the subset bound, no ASCONF case
1612 * eg. this is boundall or subset bound w/ASCONF allowed
1613 */
1614
1615 /* first, make sure it's a good address family */
1616 if (ifa->ifa_addr->sa_family != AF_INET6 &&
1617 ifa->ifa_addr->sa_family != AF_INET) {
1618 return;
1619 }
1620
1621 /* make sure we're "allowed" to add this type of addr */
1622 if (ifa->ifa_addr->sa_family == AF_INET6) {
1623 struct in6_ifaddr *ifa6;
1624
1625 /* invalid if we're not a v6 endpoint */
1626 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)
1627 return;
1628 /* is the v6 addr really valid ? */
1629 ifa6 = (struct in6_ifaddr *)ifa;
1630 if (IFA6_IS_DEPRECATED(ifa6) ||
1631 (ifa6->ia6_flags &
1632 (IN6_IFF_DETACHED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))) {
1633 /* can't use an invalid address */
1634 return;
1635 }
1636 }
1637
1638 /* put this address on the "pending/do not use yet" list */
1639 /*
1640 * Note: we do this primarily for the subset bind case
1641 * We don't have scoping flags at the EP level, so we must
1642 * add link local/site local addresses to the EP, then need
1643 * to "negate" them here. Recall that this routine is only
1644 * called for the subset bound w/ASCONF allowed case.
1645 */
1646
1647 /*
1648 * do a scope_id check against any link local addresses
1649 * in the destination nets list to see if we should put
1650 * this local address on the pending list or not
1651 * eg. don't put on the list if we have a link local
1652 * destination with the same scope_id
1653 */
1654 if (type == SCTP_ADD_IP_ADDRESS) {
1655 if (sctp_is_scopeid_in_nets(stcb, ifa->ifa_addr) == 0) {
1656 sctp_add_local_addr_assoc(stcb, ifa);
1657 #ifdef SCTP_DEBUG
1658 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1659 printf("addr_mgmt_assoc: added to pending list ");
1660 sctp_print_address(ifa->ifa_addr);
1661 }
1662 #endif /* SCTP_DEBUG */
1663 }
1664 }
1665 /*
1666 * check address scope
1667 * if address is out of scope, don't queue anything...
1668 * note: this would leave the address on both inp and asoc lists
1669 */
1670 if (ifa->ifa_addr->sa_family == AF_INET6) {
1671 #ifdef SCTP_DEBUG
1672 char ip6buf[INET6_ADDRSTRLEN];
1673 #endif /* SCTP_DEBUG */
1674 struct sockaddr_in6 *sin6;
1675
1676 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1677 #ifdef SCTP_DEBUG
1678 strlcpy(buf, IN6_PRINT(ip6buf, &sin6->sin6_addr), sizeof(buf));
1679 #endif /* SCTP_DEBUG */
1680 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1681 /* we skip unspecifed addresses */
1682 #ifdef SCTP_DEBUG
1683 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1684 printf("addr_mgmt_assoc: unspecified IPv6 addr\n");
1685 }
1686 #endif /* SCTP_DEBUG */
1687 return;
1688 }
1689 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1690 if (stcb->asoc.local_scope == 0) {
1691 #ifdef SCTP_DEBUG
1692 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1693 printf("addr_mgmt_assoc: skipping link local IPv6 addr: %s\n", buf);
1694 }
1695 #endif /* SCTP_DEBUG */
1696 return;
1697 }
1698 /* is it the right link local scope? */
1699 if (sctp_is_scopeid_in_nets(stcb, ifa->ifa_addr) == 0) {
1700 #ifdef SCTP_DEBUG
1701 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1702 printf("addr_mgmt_assoc: skipping link local IPv6 addr: %s, wrong scope_id\n", buf);
1703 }
1704 #endif /* SCTP_DEBUG */
1705 return;
1706 }
1707 }
1708 if (stcb->asoc.site_scope == 0 &&
1709 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
1710 #ifdef SCTP_DEBUG
1711 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1712 printf("addr_mgmt_assoc: skipping site local IPv6 addr: %s\n", buf);
1713 }
1714 #endif /* SCTP_DEBUG */
1715 return;
1716 }
1717 } else if (ifa->ifa_addr->sa_family == AF_INET) {
1718 struct sockaddr_in *sin;
1719 struct in6pcb *inp6;
1720
1721 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
1722 /* invalid if we are a v6 only endpoint */
1723 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1724 (inp6->in6p_flags & IN6P_IPV6_V6ONLY)
1725 )
1726 return;
1727
1728 sin = (struct sockaddr_in *)ifa->ifa_addr;
1729 #ifdef SCTP_DEBUG
1730 strlcpy(buf, inet_ntoa(sin->sin_addr), sizeof(buf));
1731 #endif /* SCTP_DEBUG */
1732 if (sin->sin_addr.s_addr == 0) {
1733 /* we skip unspecifed addresses */
1734 #ifdef SCTP_DEBUG
1735 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1736 printf("addr_mgmt_assoc: unspecified IPv4 addr\n");
1737 }
1738 #endif /* SCTP_DEBUG */
1739 return;
1740 }
1741 if (stcb->asoc.ipv4_local_scope == 0 &&
1742 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1743 #ifdef SCTP_DEBUG
1744 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1745 printf("addr_mgmt_assoc: skipping private IPv4 addr: %s\n", buf);
1746 }
1747 #endif /* SCTP_DEBUG */
1748 return;
1749 }
1750 } else {
1751 /* else, not AF_INET or AF_INET6, so skip */
1752 #ifdef SCTP_DEBUG
1753 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1754 printf("addr_mgmt_assoc: not AF_INET or AF_INET6\n");
1755 }
1756 #endif /* SCTP_DEBUG */
1757 return;
1758 }
1759
1760 /* queue an asconf for this address add/delete */
1761 if (inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) {
1762 /* does the peer do asconf? */
1763 if (stcb->asoc.peer_supports_asconf) {
1764 /* queue an asconf for this addr */
1765 status = sctp_asconf_queue_add(stcb, ifa, type);
1766 /*
1767 * if queued ok, and in correct state, set the
1768 * ASCONF timer
1769 * if in non-open state, we will set this timer
1770 * when the state does go open and do all the
1771 * asconf's
1772 */
1773 if (status == 0 &&
1774 SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
1775 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
1776 stcb, stcb->asoc.primary_destination);
1777 }
1778 }
1779 } else {
1780 /* this is the boundall, no ASCONF case */
1781 #if 0 /* assume kernel will delete this very shortly; add done above */
1782 if (type == SCTP_DEL_IP_ADDRESS) {
1783 /* if deleting, add this addr to the do not use list */
1784 sctp_add_local_addr_assoc(stcb, ifa);
1785 }
1786 #endif
1787 }
1788 }
1789
1790 static void
1791 sctp_addr_mgmt_ep(struct sctp_inpcb *inp, struct ifaddr *ifa, uint16_t type)
1792 {
1793 struct sctp_tcb *stcb;
1794 int s;
1795
1796 SCTP_INP_WLOCK(inp);
1797 /* make sure we're "allowed" to add this type of addr */
1798 if (ifa->ifa_addr->sa_family == AF_INET6) {
1799 struct in6_ifaddr *ifa6;
1800
1801 /* invalid if we're not a v6 endpoint */
1802 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1803 SCTP_INP_WUNLOCK(inp);
1804 return;
1805 }
1806 /* is the v6 addr really valid ? */
1807 ifa6 = (struct in6_ifaddr *)ifa;
1808 if (IFA6_IS_DEPRECATED(ifa6) ||
1809 (ifa6->ia6_flags &
1810 (IN6_IFF_DETACHED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))) {
1811 /* can't use an invalid address */
1812 SCTP_INP_WUNLOCK(inp);
1813 return;
1814 }
1815 } else if (ifa->ifa_addr->sa_family == AF_INET) {
1816 /* invalid if we are a v6 only endpoint */
1817 struct in6pcb *inp6;
1818 inp6 = (struct in6pcb *)&inp->ip_inp.inp;
1819
1820 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1821 (inp6->in6p_flags & IN6P_IPV6_V6ONLY)
1822 ) {
1823 SCTP_INP_WUNLOCK(inp);
1824 return;
1825 }
1826 } else {
1827 /* invalid address family */
1828 SCTP_INP_WUNLOCK(inp);
1829 return;
1830 }
1831 /* is this endpoint subset bound ? */
1832 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1833 /* subset bound endpoint */
1834 if ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0) {
1835 /*
1836 * subset bound, but ASCONFs not allowed...
1837 * if adding, nothing to do, since not allowed
1838 * if deleting, remove address from endpoint
1839 * peer will have to "timeout" this addr
1840 */
1841 if (type == SCTP_DEL_IP_ADDRESS) {
1842 sctp_del_local_addr_ep(inp, ifa);
1843 }
1844 /* no asconfs to queue for this inp... */
1845 SCTP_INP_WUNLOCK(inp);
1846 return;
1847 } else {
1848 /*
1849 * subset bound, ASCONFs allowed...
1850 * if adding, add address to endpoint list
1851 * if deleting, remove address from endpoint
1852 */
1853 if (type == SCTP_ADD_IP_ADDRESS) {
1854 sctp_add_local_addr_ep(inp, ifa);
1855 } else {
1856 sctp_del_local_addr_ep(inp, ifa);
1857 }
1858 /* drop through and notify all asocs */
1859 }
1860 }
1861
1862 s = splsoftnet();
1863 /* process for all associations for this endpoint */
1864 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
1865 SCTP_TCB_LOCK(stcb);
1866 sctp_addr_mgmt_assoc(inp, stcb, ifa, type);
1867 SCTP_TCB_UNLOCK(stcb);
1868 } /* for each stcb */
1869 splx(s);
1870 SCTP_INP_WUNLOCK(inp);
1871 }
1872
1873 /*
1874 * restrict the use of this address
1875 */
1876 static void
1877 sctp_addr_mgmt_restrict_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
1878 {
1879 struct sctp_tcb *stcb;
1880 int s;
1881
1882 /* is this endpoint bound to all? */
1883 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1884 /*
1885 * Nothing to do for subset bound case.
1886 * Allow sctp_bindx() to manage the address lists
1887 */
1888 return;
1889 }
1890
1891 s = splsoftnet();
1892 SCTP_INP_RLOCK(inp);
1893 /* process for all associations for this endpoint */
1894 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
1895 /* put this address on the "pending/do not use yet" list */
1896 SCTP_TCB_LOCK(stcb);
1897 sctp_add_local_addr_assoc(stcb, ifa);
1898 SCTP_TCB_UNLOCK(stcb);
1899 #ifdef SCTP_DEBUG
1900 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1901 printf("restrict_ep: added addr to unusable list\n");
1902 }
1903 #endif /* SCTP_DEBUG */
1904 } /* for each stcb */
1905 splx(s);
1906 SCTP_INP_RUNLOCK(inp);
1907 }
1908
1909 /*
1910 * this is only called for kernel initiated address changes
1911 * eg. it will check the PCB_FLAGS_AUTO_ASCONF flag
1912 */
1913 static void
1914 sctp_addr_mgmt(struct ifaddr *ifa, uint16_t type) {
1915 struct sockaddr *sa;
1916 struct sctp_inpcb *inp;
1917
1918 /* make sure we care about this interface... */
1919 if (!sctp_is_desired_interface_type(ifa)) {
1920 #ifdef SCTP_DEBUG
1921 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1922 printf("sctp_addr_mgmt: ignoring this interface\n");
1923 }
1924 #endif /* SCTP_DEBUG */
1925 return;
1926 }
1927
1928 sa = ifa->ifa_addr;
1929 if (sa->sa_family != AF_INET && sa->sa_family != AF_INET6)
1930 return;
1931
1932 #ifdef SCTP_DEBUG
1933 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1934 if (type == SCTP_ADD_IP_ADDRESS)
1935 printf("sctp_addr_mgmt: kernel adds ");
1936 else
1937 printf("sctp_addr_mgmt: kernel deletes ");
1938 sctp_print_address(sa);
1939 }
1940 #endif /* SCTP_DEBUG */
1941
1942 /* go through all our PCB's */
1943 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
1944 if (inp->sctp_flags & SCTP_PCB_FLAGS_AUTO_ASCONF) {
1945 sctp_addr_mgmt_ep(inp, ifa, type);
1946 } else {
1947 /* this address is going away anyways... */
1948 if (type == SCTP_DEL_IP_ADDRESS)
1949 return;
1950 /* (temporarily) restrict this address */
1951 sctp_addr_mgmt_restrict_ep(inp, ifa);
1952 }
1953 /* else, not allowing automatic asconf's, so ignore */
1954 } /* for each inp */
1955 }
1956
1957 /*
1958 * add/delete IP address requests from kernel (via routing change)
1959 * assumed that the address is non-broadcast, non-multicast
1960 * all addresses are passed from any type of interface-- need to filter
1961 * duplicate addresses may get requested
1962 */
1963
1964 void
1965 sctp_add_ip_address(struct ifaddr *ifa)
1966 {
1967 sctp_addr_mgmt(ifa, SCTP_ADD_IP_ADDRESS);
1968 }
1969
1970 void
1971 sctp_delete_ip_address(struct ifaddr *ifa)
1972 {
1973 struct sctp_inpcb *inp;
1974
1975 /* process the delete */
1976 sctp_addr_mgmt(ifa, SCTP_DEL_IP_ADDRESS);
1977
1978 /*
1979 * need to remove this ifaddr from any cached routes
1980 * and also any from any assoc "restricted/pending" lists
1981 */
1982 /* make sure we care about this interface... */
1983 if (!sctp_is_desired_interface_type(ifa)) {
1984 #ifdef SCTP_DEBUG
1985 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
1986 printf("sctp_delete_ip_address: ignoring this interface\n");
1987 }
1988 #endif /* SCTP_DEBUG */
1989 return;
1990 }
1991
1992 /* go through all our PCB's */
1993 SCTP_INP_INFO_RLOCK();
1994 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
1995 struct sctp_tcb *stcb;
1996 struct sctp_laddr *laddr, *laddr_next;
1997
1998 /* process for all associations for this endpoint */
1999 SCTP_INP_RLOCK(inp);
2000 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
2001 struct sctp_nets *net;
2002
2003 /* process through the nets list */
2004 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2005 rtcache_free(&net->ro); /* XXX - was clear */
2006 } /* for each net */
2007 /* process through the asoc "pending" list */
2008 laddr = LIST_FIRST(&stcb->asoc.sctp_local_addr_list);
2009 while (laddr != NULL) {
2010 laddr_next = LIST_NEXT(laddr, sctp_nxt_addr);
2011 /* remove if in use */
2012 if (laddr->ifa == ifa) {
2013 sctp_remove_laddr(laddr);
2014 }
2015 laddr = laddr_next;
2016 } /* while */
2017 } /* for each stcb */
2018 /* process through the inp bound addr list */
2019 laddr = LIST_FIRST(&inp->sctp_addr_list);
2020 while (laddr != NULL) {
2021 laddr_next = LIST_NEXT(laddr, sctp_nxt_addr);
2022 /* remove if in use */
2023 if (laddr->ifa == ifa) {
2024 sctp_remove_laddr(laddr);
2025 }
2026 laddr = laddr_next;
2027 } /* while */
2028 SCTP_INP_RUNLOCK(inp);
2029 } /* for each inp */
2030 SCTP_INP_INFO_RUNLOCK();
2031 }
2032
2033 /*
2034 * sa is the sockaddr to ask the peer to set primary to
2035 * returns: 0 = completed, -1 = error
2036 */
2037 int32_t
2038 sctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
2039 {
2040 /* NOTE: we currently don't check the validity of the address! */
2041
2042 /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2043 if (!sctp_asconf_queue_add_sa(stcb, sa, SCTP_SET_PRIM_ADDR)) {
2044 /* set primary queuing succeeded */
2045 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
2046 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2047 stcb->sctp_ep, stcb,
2048 stcb->asoc.primary_destination);
2049 }
2050 #ifdef SCTP_DEBUG
2051 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2052 printf("set_primary_ip_address_sa: queued on tcb=%p, ",
2053 stcb);
2054 sctp_print_address(sa);
2055 }
2056 #endif /* SCTP_DEBUG */
2057 } else {
2058 #ifdef SCTP_DEBUG
2059 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2060 printf("set_primary_ip_address_sa: failed to add to queue on tcb=%p, ",
2061 stcb);
2062 sctp_print_address(sa);
2063 }
2064 #endif /* SCTP_DEBUG */
2065 return (-1);
2066 }
2067 return (0);
2068 }
2069
2070 void
2071 sctp_set_primary_ip_address(struct ifaddr *ifa)
2072 {
2073 struct sctp_inpcb *inp;
2074
2075 /* make sure we care about this interface... */
2076 if (!sctp_is_desired_interface_type(ifa)) {
2077 #ifdef SCTP_DEBUG
2078 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2079 printf("set_primary_ip_address: ignoring this interface\n");
2080 }
2081 #endif /* SCTP_DEBUG */
2082 return;
2083 }
2084
2085 /* go through all our PCB's */
2086 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
2087 struct sctp_tcb *stcb;
2088
2089 /* process for all associations for this endpoint */
2090 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
2091 /* queue an ASCONF:SET_PRIM_ADDR to be sent */
2092 if (!sctp_asconf_queue_add(stcb, ifa,
2093 SCTP_SET_PRIM_ADDR)) {
2094 /* set primary queuing succeeded */
2095 if (SCTP_GET_STATE(&stcb->asoc) ==
2096 SCTP_STATE_OPEN) {
2097 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2098 stcb->sctp_ep, stcb,
2099 stcb->asoc.primary_destination);
2100 }
2101 #ifdef SCTP_DEBUG
2102 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2103 printf("set_primary_ip_address: queued on stcb=%p, ",
2104 stcb);
2105 sctp_print_address(ifa->ifa_addr);
2106 }
2107 #endif /* SCTP_DEBUG */
2108 } else {
2109 #ifdef SCTP_DEBUG
2110 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2111 printf("set_primary_ip_address: failed to add to queue, ");
2112 sctp_print_address(ifa->ifa_addr);
2113 }
2114 #endif /* SCTP_DEBUG */
2115 }
2116 } /* for each stcb */
2117 } /* for each inp */
2118 }
2119
2120 static struct sockaddr *
2121 sctp_find_valid_localaddr(struct sctp_tcb *stcb)
2122 {
2123 struct ifnet *ifn;
2124 struct ifaddr *ifa;
2125 int s;
2126
2127 s = pserialize_read_enter();
2128 IFNET_READER_FOREACH(ifn) {
2129 if (stcb->asoc.loopback_scope == 0 && ifn->if_type == IFT_LOOP) {
2130 /* Skip if loopback_scope not set */
2131 continue;
2132 }
2133 IFADDR_READER_FOREACH(ifa, ifn) {
2134 if (ifa->ifa_addr->sa_family == AF_INET &&
2135 stcb->asoc.ipv4_addr_legal) {
2136 struct sockaddr_in *sin;
2137
2138 sin = (struct sockaddr_in *)ifa->ifa_addr;
2139 if (sin->sin_addr.s_addr == 0) {
2140 /* skip unspecifed addresses */
2141 continue;
2142 }
2143 if (stcb->asoc.ipv4_local_scope == 0 &&
2144 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))
2145 continue;
2146
2147 if (sctp_is_addr_restricted(stcb,
2148 ifa->ifa_addr))
2149 continue;
2150 pserialize_read_exit(s);
2151
2152 /* found a valid local v4 address to use */
2153 return (ifa->ifa_addr);
2154 } else if (ifa->ifa_addr->sa_family == AF_INET6 &&
2155 stcb->asoc.ipv6_addr_legal) {
2156 struct sockaddr_in6 *sin6;
2157 struct in6_ifaddr *ifa6;
2158
2159 ifa6 = (struct in6_ifaddr *)ifa;
2160 if (IFA6_IS_DEPRECATED(ifa6) ||
2161 (ifa6->ia6_flags & (IN6_IFF_DETACHED |
2162 IN6_IFF_ANYCAST | IN6_IFF_NOTREADY)))
2163 continue;
2164
2165 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
2166 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2167 /* we skip unspecifed addresses */
2168 continue;
2169 }
2170 if (stcb->asoc.local_scope == 0 &&
2171 IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
2172 continue;
2173 if (stcb->asoc.site_scope == 0 &&
2174 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))
2175 continue;
2176
2177 pserialize_read_exit(s);
2178 /* found a valid local v6 address to use */
2179 return (ifa->ifa_addr);
2180 }
2181 }
2182 }
2183 pserialize_read_exit(s);
2184
2185 /* no valid addresses found */
2186 return (NULL);
2187 }
2188
2189 static struct sockaddr *
2190 sctp_find_valid_localaddr_ep(struct sctp_tcb *stcb)
2191 {
2192 struct sctp_laddr *laddr;
2193
2194 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
2195 if (laddr->ifa == NULL) {
2196 #ifdef SCTP_DEBUG
2197 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2198 printf("find_valid_localaddr_ep: laddr error\n");
2199 }
2200 #endif /* SCTP_DEBUG */
2201 continue;
2202 }
2203 if (laddr->ifa->ifa_addr == NULL) {
2204 #ifdef SCTP_DEBUG
2205 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2206 printf("find_valid_localaddr_ep: laddr->ifa error\n");
2207 }
2208 #endif /* SCTP_DEBUG */
2209 continue;
2210 }
2211 /* is the address restricted ? */
2212 if (sctp_is_addr_restricted(stcb, laddr->ifa->ifa_addr))
2213 continue;
2214
2215 /* found a valid local address to use */
2216 return (laddr->ifa->ifa_addr);
2217 }
2218 /* no valid addresses found */
2219 return (NULL);
2220 }
2221
2222 /*
2223 * builds an ASCONF chunk from queued ASCONF params
2224 * returns NULL on error (no mbuf, no ASCONF params queued, etc)
2225 */
2226 struct mbuf *
2227 sctp_compose_asconf(struct sctp_tcb *stcb)
2228 {
2229 struct mbuf *m_asconf, *m_asconf_chk;
2230 struct sctp_asconf_addr *aa;
2231 struct sctp_asconf_chunk *acp;
2232 struct sctp_asconf_paramhdr *aph;
2233 struct sctp_asconf_addr_param *aap;
2234 uint32_t p_length;
2235 uint32_t correlation_id = 1; /* 0 is reserved... */
2236 vaddr_t ptr, lookup_ptr;
2237 uint8_t lookup_used = 0;
2238
2239 /* are there any asconf params to send? */
2240 if (TAILQ_EMPTY(&stcb->asoc.asconf_queue)) {
2241 return (NULL);
2242 }
2243
2244 /*
2245 * get a chunk header mbuf and a cluster for the asconf params
2246 * since it's simpler to fill in the asconf chunk header lookup
2247 * address on the fly
2248 */
2249 m_asconf_chk = NULL;
2250 MGETHDR(m_asconf_chk, M_DONTWAIT, MT_DATA);
2251 if (m_asconf_chk == NULL) {
2252 /* no mbuf's */
2253 #ifdef SCTP_DEBUG
2254 if (sctp_debug_on & SCTP_DEBUG_ASCONF1)
2255 printf("compose_asconf: couldn't get chunk mbuf!\n");
2256 #endif /* SCTP_DEBUG */
2257 return (NULL);
2258 }
2259 m_asconf = NULL;
2260 MGETHDR(m_asconf, M_DONTWAIT, MT_HEADER);
2261 if (m_asconf == NULL) {
2262 /* no mbuf's */
2263 #ifdef SCTP_DEBUG
2264 if (sctp_debug_on & SCTP_DEBUG_ASCONF1)
2265 printf("compose_asconf: couldn't get mbuf!\n");
2266 #endif /* SCTP_DEBUG */
2267 sctp_m_freem(m_asconf_chk);
2268 return (NULL);
2269 }
2270 MCLGET(m_asconf, M_DONTWAIT);
2271 if ((m_asconf->m_flags & M_EXT) != M_EXT) {
2272 /* failed to get cluster buffer */
2273 #ifdef SCTP_DEBUG
2274 if (sctp_debug_on & SCTP_DEBUG_ASCONF1)
2275 printf("compose_asconf: couldn't get cluster!\n");
2276 #endif /* SCTP_DEBUG */
2277 sctp_m_freem(m_asconf_chk);
2278 sctp_m_freem(m_asconf);
2279 return (NULL);
2280 }
2281
2282 m_asconf_chk->m_len = sizeof(struct sctp_asconf_chunk);
2283 m_asconf->m_len = 0;
2284 acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *);
2285 memset(acp, 0, sizeof(struct sctp_asconf_chunk));
2286 /* save pointers to lookup address and asconf params */
2287 lookup_ptr = (vaddr_t)(acp + 1); /* after the header */
2288 ptr = mtod(m_asconf, vaddr_t); /* beginning of cluster */
2289
2290 /* fill in chunk header info */
2291 acp->ch.chunk_type = SCTP_ASCONF;
2292 acp->ch.chunk_flags = 0;
2293 acp->serial_number = htonl(stcb->asoc.asconf_seq_out);
2294
2295 /* add parameters... up to smallest MTU allowed */
2296 TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) {
2297 /* get the parameter length */
2298 p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length);
2299 /* will it fit in current chunk? */
2300 if (m_asconf->m_len + p_length > stcb->asoc.smallest_mtu) {
2301 /* won't fit, so we're done with this chunk */
2302 break;
2303 }
2304 /* assign (and store) a correlation id */
2305 aa->ap.aph.correlation_id = correlation_id++;
2306
2307 /*
2308 * fill in address if we're doing a delete
2309 * this is a simple way for us to fill in the correlation
2310 * address, which should only be used by the peer if we're
2311 * deleting our source address and adding a new address
2312 * (e.g. renumbering case)
2313 */
2314 if (lookup_used == 0 &&
2315 aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) {
2316 struct sctp_ipv6addr_param *lookup;
2317 uint16_t p_size, addr_size;
2318
2319 lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2320 lookup->ph.param_type =
2321 htons(aa->ap.addrp.ph.param_type);
2322 if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) {
2323 /* copy IPv6 address */
2324 p_size = sizeof(struct sctp_ipv6addr_param);
2325 addr_size = sizeof(struct in6_addr);
2326 } else {
2327 /* copy IPv4 address */
2328 p_size = sizeof(struct sctp_ipv4addr_param);
2329 addr_size = sizeof(struct in_addr);
2330 }
2331 lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2332 memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size);
2333 m_asconf_chk->m_len += SCTP_SIZE32(p_size);
2334 lookup_used = 1;
2335 }
2336
2337 /* copy into current space */
2338 memcpy((void *)ptr, &aa->ap, p_length);
2339
2340 /* network elements and update lengths */
2341 aph = (struct sctp_asconf_paramhdr *) ptr;
2342 aap = (struct sctp_asconf_addr_param *) ptr;
2343 /* correlation_id is transparent to peer, no htonl needed */
2344 aph->ph.param_type = htons(aph->ph.param_type);
2345 aph->ph.param_length = htons(aph->ph.param_length);
2346 aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type);
2347 aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length);
2348
2349 m_asconf->m_len += SCTP_SIZE32(p_length);
2350 ptr += SCTP_SIZE32(p_length);
2351
2352 /*
2353 * these params are removed off the pending list upon
2354 * getting an ASCONF-ACK back from the peer, just set flag
2355 */
2356 aa->sent = 1;
2357 }
2358 /* check to see if the lookup addr has been populated yet */
2359 if (lookup_used == 0) {
2360 /* NOTE: if the address param is optional, can skip this... */
2361 /* add any valid (existing) address... */
2362 struct sctp_ipv6addr_param *lookup;
2363 uint16_t p_size, addr_size;
2364 struct sockaddr *found_addr;
2365 vaddr_t addr_ptr;
2366
2367 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)
2368 found_addr = sctp_find_valid_localaddr(stcb);
2369 else
2370 found_addr = sctp_find_valid_localaddr_ep(stcb);
2371
2372 lookup = (struct sctp_ipv6addr_param *)lookup_ptr;
2373 if (found_addr != NULL) {
2374 if (found_addr->sa_family == AF_INET6) {
2375 /* copy IPv6 address */
2376 lookup->ph.param_type =
2377 htons(SCTP_IPV6_ADDRESS);
2378 p_size = sizeof(struct sctp_ipv6addr_param);
2379 addr_size = sizeof(struct in6_addr);
2380 addr_ptr = (vaddr_t)&((struct sockaddr_in6 *)
2381 found_addr)->sin6_addr;
2382 } else {
2383 /* copy IPv4 address */
2384 lookup->ph.param_type =
2385 htons(SCTP_IPV4_ADDRESS);
2386 p_size = sizeof(struct sctp_ipv4addr_param);
2387 addr_size = sizeof(struct in_addr);
2388 addr_ptr = (vaddr_t)&((struct sockaddr_in *)
2389 found_addr)->sin_addr;
2390 }
2391 lookup->ph.param_length = htons(SCTP_SIZE32(p_size));
2392 memcpy(lookup->addr, (void *)addr_ptr, addr_size);
2393 m_asconf_chk->m_len += SCTP_SIZE32(p_size);
2394 lookup_used = 1;
2395 } else {
2396 /* uh oh... don't have any address?? */
2397 #ifdef SCTP_DEBUG
2398 if (sctp_debug_on & SCTP_DEBUG_ASCONF1)
2399 printf("compose_asconf: no lookup addr!\n");
2400 #endif /* SCTP_DEBUG */
2401 /* for now, we send a IPv4 address of 0.0.0.0 */
2402 lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS);
2403 lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)));
2404 memset(lookup->addr, 0, sizeof(struct in_addr));
2405 m_asconf_chk->m_len += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param));
2406 lookup_used = 1;
2407 }
2408 }
2409
2410 /* chain it all together */
2411 m_asconf_chk->m_next = m_asconf;
2412 m_asconf_chk->m_pkthdr.len = m_asconf_chk->m_len + m_asconf->m_len;
2413 acp->ch.chunk_length = ntohs(m_asconf_chk->m_pkthdr.len);
2414
2415 /* update "sent" flag */
2416 stcb->asoc.asconf_sent++;
2417
2418 return (m_asconf_chk);
2419 }
2420
2421 /*
2422 * section to handle address changes before an association is up
2423 * eg. changes during INIT/INIT-ACK/COOKIE-ECHO handshake
2424 */
2425
2426 /*
2427 * processes the (local) addresses in the INIT-ACK chunk
2428 */
2429 static void
2430 sctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m,
2431 unsigned int offset, unsigned int length)
2432 {
2433 struct sctp_paramhdr tmp_param, *ph;
2434 uint16_t plen, ptype;
2435 struct sctp_ipv6addr_param addr_store;
2436 struct sockaddr_in6 sin6;
2437 struct sockaddr_in sin;
2438 struct sockaddr *sa;
2439 struct ifaddr *ifa;
2440
2441 #ifdef SCTP_DEBUG
2442 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2443 printf("processing init-ack addresses\n");
2444 }
2445 #endif /* SCTP_DEBUG */
2446
2447 /* convert to upper bound */
2448 length += offset;
2449
2450 if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2451 #ifdef SCTP_DEBUG
2452 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2453 printf("process_initack_addrs: invalid offset?\n");
2454 }
2455 #endif /* SCTP_DEBUG */
2456 return;
2457 }
2458
2459 /* init the addresses */
2460 memset(&sin6, 0, sizeof(sin6));
2461 sin6.sin6_family = AF_INET6;
2462 sin6.sin6_len = sizeof(sin6);
2463 sin6.sin6_port = stcb->rport;
2464
2465 memset(&sin, 0, sizeof(sin));
2466 sin.sin_len = sizeof(sin);
2467 sin.sin_family = AF_INET;
2468 sin.sin_port = stcb->rport;
2469
2470 /* go through the addresses in the init-ack */
2471 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2472 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2473 while (ph != NULL) {
2474 ptype = ntohs(ph->param_type);
2475 plen = ntohs(ph->param_length);
2476 if (ptype == SCTP_IPV6_ADDRESS) {
2477 struct sctp_ipv6addr_param *a6p;
2478 /* get the entire IPv6 address param */
2479 #ifdef SCTP_DEBUG
2480 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2481 printf("process_initack_addrs: checking IPv6 param\n");
2482 }
2483 #endif /* SCTP_DEBUG */
2484 a6p = (struct sctp_ipv6addr_param *)
2485 sctp_m_getptr(m, offset,
2486 sizeof(struct sctp_ipv6addr_param),
2487 (uint8_t *)&addr_store);
2488 if (plen != sizeof(struct sctp_ipv6addr_param) ||
2489 a6p == NULL) {
2490 #ifdef SCTP_DEBUG
2491 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2492 printf("process_initack_addrs: invalid IPv6 param length\n");
2493 }
2494 #endif /* SCTP_DEBUG */
2495 return;
2496 }
2497 memcpy(&sin6.sin6_addr, a6p->addr,
2498 sizeof(struct in6_addr));
2499 sa = (struct sockaddr *)&sin6;
2500 } else if (ptype == SCTP_IPV4_ADDRESS) {
2501 struct sctp_ipv4addr_param *a4p;
2502 /* get the entire IPv4 address param */
2503 #ifdef SCTP_DEBUG
2504 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2505 printf("process_initack_addrs: checking IPv4 param\n");
2506 }
2507 #endif /* SCTP_DEBUG */
2508 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_ipv4addr_param), (uint8_t *)&addr_store);
2509 if (plen != sizeof(struct sctp_ipv4addr_param) ||
2510 a4p == NULL) {
2511 #ifdef SCTP_DEBUG
2512 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2513 printf("process_initack_addrs: invalid IPv4 param length\n");
2514 }
2515 #endif /* SCTP_DEBUG */
2516 return;
2517 }
2518 sin.sin_addr.s_addr = a4p->addr;
2519 sa = (struct sockaddr *)&sin;
2520 } else {
2521 #ifdef SCTP_DEBUG
2522 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2523 printf("process_initack_addrs: skipping param type=%xh\n", ptype);
2524 }
2525 #endif /* SCTP_DEBUG */
2526 goto next_addr;
2527 }
2528
2529 /* see if this address really (still) exists */
2530 ifa = sctp_find_ifa_by_addr(sa);
2531 if (ifa == NULL) {
2532 /* address doesn't exist anymore */
2533 int status;
2534 /* are ASCONFs allowed ? */
2535 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) &&
2536 stcb->asoc.peer_supports_asconf) {
2537 /* queue an ASCONF DEL_IP_ADDRESS */
2538 status = sctp_asconf_queue_add_sa(stcb, sa,
2539 SCTP_DEL_IP_ADDRESS);
2540 /*
2541 * if queued ok, and in correct state,
2542 * set the ASCONF timer
2543 */
2544 if (status == 0 &&
2545 SCTP_GET_STATE(&stcb->asoc) ==
2546 SCTP_STATE_OPEN) {
2547 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2548 stcb->sctp_ep, stcb,
2549 stcb->asoc.primary_destination);
2550 }
2551 }
2552 } else {
2553 /* address still exists */
2554 /*
2555 * if subset bound, ep addr's managed by default
2556 * if not doing ASCONF, add the address to the assoc
2557 */
2558 if ((stcb->sctp_ep->sctp_flags &
2559 SCTP_PCB_FLAGS_BOUNDALL) == 0 &&
2560 (stcb->sctp_ep->sctp_flags &
2561 SCTP_PCB_FLAGS_DO_ASCONF) == 0) {
2562 #ifdef SCTP_DEBUG
2563 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2564 printf("process_initack_addrs: adding local addr to asoc\n");
2565 }
2566 #endif /* SCTP_DEBUG */
2567 sctp_add_local_addr_assoc(stcb, ifa);
2568 }
2569 }
2570
2571 next_addr:
2572 /* get next parameter */
2573 offset += SCTP_SIZE32(plen);
2574 if ((offset + sizeof(struct sctp_paramhdr)) > length)
2575 return;
2576 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2577 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2578 } /* while */
2579 }
2580
2581 /* FIX ME: need to verify return result for v6 address type if v6 disabled */
2582 /*
2583 * checks to see if a specific address is in the initack address list
2584 * returns 1 if found, 0 if not
2585 */
2586 static uint32_t
2587 sctp_addr_in_initack(struct sctp_tcb *stcb, struct mbuf *m, unsigned int offset,
2588 unsigned int length, struct sockaddr *sa)
2589 {
2590 struct sctp_paramhdr tmp_param, *ph;
2591 uint16_t plen, ptype;
2592 struct sctp_ipv6addr_param addr_store;
2593 struct sockaddr_in *sin;
2594 struct sctp_ipv4addr_param *a4p;
2595 #ifdef INET6
2596 struct sockaddr_in6 *sin6, sin6_tmp;
2597 struct sctp_ipv6addr_param *a6p;
2598 #endif /* INET6 */
2599
2600 if (
2601 #ifdef INET6
2602 (sa->sa_family != AF_INET6) &&
2603 #endif /* INET6 */
2604 (sa->sa_family != AF_INET))
2605 return (0);
2606
2607 #ifdef SCTP_DEBUG
2608 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2609 printf("find_initack_addr: starting search for ");
2610 sctp_print_address(sa);
2611 }
2612 #endif /* SCTP_DEBUG */
2613 /* convert to upper bound */
2614 length += offset;
2615
2616 if ((offset + sizeof(struct sctp_paramhdr)) > length) {
2617 #ifdef SCTP_DEBUG
2618 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2619 printf("find_initack_addr: invalid offset?\n");
2620 }
2621 #endif /* SCTP_DEBUG */
2622 return (0);
2623 }
2624
2625 /* go through the addresses in the init-ack */
2626 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
2627 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
2628 while (ph != NULL) {
2629 ptype = ntohs(ph->param_type);
2630 plen = ntohs(ph->param_length);
2631 #ifdef INET6
2632 if (ptype == SCTP_IPV6_ADDRESS && sa->sa_family == AF_INET6) {
2633 /* get the entire IPv6 address param */
2634 #ifdef SCTP_DEBUG
2635 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2636 printf("addr_in_initack: checking IPv6 param\n");
2637 }
2638 #endif /* SCTP_DEBUG */
2639 a6p = (struct sctp_ipv6addr_param *)
2640 sctp_m_getptr(m, offset,
2641 sizeof(struct sctp_ipv6addr_param),
2642 (uint8_t *)&addr_store);
2643 if (plen != sizeof(struct sctp_ipv6addr_param) ||
2644 ph == NULL) {
2645 #ifdef SCTP_DEBUG
2646 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2647 printf("addr_in_initack: invalid IPv6 param length\n");
2648 }
2649 #endif /* SCTP_DEBUG */
2650 return (0);
2651 }
2652 sin6 = (struct sockaddr_in6 *)sa;
2653 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
2654 /* create a copy and clear scope */
2655 memcpy(&sin6_tmp, sin6,
2656 sizeof(struct sockaddr_in6));
2657 sin6 = &sin6_tmp;
2658 in6_clearscope(&sin6->sin6_addr);
2659 }
2660 if (memcmp(&sin6->sin6_addr, a6p->addr,
2661 sizeof(struct in6_addr)) == 0) {
2662 /* found it */
2663 #ifdef SCTP_DEBUG
2664 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2665 printf("addr_in_initack: found IPv6 addr\n");
2666 }
2667 #endif /* SCTP_DEBUG */
2668 return (1);
2669 }
2670 } else
2671 #endif /* INET6 */
2672
2673 if (ptype == SCTP_IPV4_ADDRESS &&
2674 sa->sa_family == AF_INET) {
2675 /* get the entire IPv4 address param */
2676 #ifdef SCTP_DEBUG
2677 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2678 printf("addr_in_initack: checking IPv4 param\n");
2679 }
2680 #endif /* SCTP_DEBUG */
2681 a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m,
2682 offset, sizeof(struct sctp_ipv4addr_param),
2683 (uint8_t *)&addr_store);
2684 if (plen != sizeof(struct sctp_ipv4addr_param) ||
2685 ph == NULL) {
2686 #ifdef SCTP_DEBUG
2687 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2688 printf("addr_in_initack: invalid IPv4 param length\n");
2689 }
2690 #endif /* SCTP_DEBUG */
2691 return (0);
2692 }
2693 sin = (struct sockaddr_in *)sa;
2694 if (sin->sin_addr.s_addr == a4p->addr) {
2695 /* found it */
2696 #ifdef SCTP_DEBUG
2697 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2698 printf("addr_in_initack: found IPv4 addr\n");
2699 }
2700 #endif /* SCTP_DEBUG */
2701 return (1);
2702 }
2703 } else {
2704 #ifdef SCTP_DEBUG
2705 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2706 printf("addr_in_initack: skipping param type=%xh\n", ptype);
2707 }
2708 #endif /* SCTP_DEBUG */
2709 }
2710 /* get next parameter */
2711 offset += SCTP_SIZE32(plen);
2712 if (offset + sizeof(struct sctp_paramhdr) > length)
2713 return (0);
2714 ph = (struct sctp_paramhdr *)
2715 sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
2716 (uint8_t *)&tmp_param);
2717 } /* while */
2718 /* not found! */
2719 #ifdef SCTP_DEBUG
2720 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2721 printf("addr_in_initack: not found!\n");
2722 }
2723 #endif /* SCTP_DEBUG */
2724 return (0);
2725 }
2726
2727 /*
2728 * makes sure that the current endpoint local addr list is consistent
2729 * with the new association (eg. subset bound, asconf allowed)
2730 * adds addresses as necessary
2731 */
2732 static void
2733 sctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset,
2734 int length, struct sockaddr *init_addr)
2735 {
2736 struct sctp_laddr *laddr;
2737
2738 /* go through the endpoint list */
2739 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
2740 /* be paranoid and validate the laddr */
2741 if (laddr->ifa == NULL) {
2742 #ifdef SCTP_DEBUG
2743 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2744 printf("check_addr_list_ep: laddr->ifa is NULL");
2745 }
2746 #endif
2747 continue;
2748 }
2749 if (laddr->ifa->ifa_addr == NULL) {
2750 #ifdef SCTP_DEBUG
2751 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2752 printf("check_addr_list_ep: laddr->ifa->ifa_addr is NULL");
2753 }
2754 #endif
2755 continue;
2756 }
2757 /* do i have it implicitly? */
2758 if (sctp_cmpaddr(laddr->ifa->ifa_addr, init_addr)) {
2759 #ifdef SCTP_DEBUG
2760 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2761 printf("check_address_list_all: skipping ");
2762 sctp_print_address(laddr->ifa->ifa_addr);
2763 }
2764 #endif /* SCTP_DEBUG */
2765 continue;
2766 }
2767 /* check to see if in the init-ack */
2768 if (!sctp_addr_in_initack(stcb, m, offset, length,
2769 laddr->ifa->ifa_addr)) {
2770 /* try to add it */
2771 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa,
2772 SCTP_ADD_IP_ADDRESS);
2773 }
2774 }
2775 }
2776
2777 /*
2778 * makes sure that the current kernel address list is consistent
2779 * with the new association (with all addrs bound)
2780 * adds addresses as necessary
2781 */
2782 static void
2783 sctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset,
2784 int length, struct sockaddr *init_addr, uint16_t local_scope,
2785 uint16_t site_scope, uint16_t ipv4_scope, uint16_t loopback_scope)
2786 {
2787 struct ifnet *ifn;
2788 struct ifaddr *ifa;
2789 int s;
2790
2791 /* go through all our known interfaces */
2792 s = pserialize_read_enter();
2793 IFNET_READER_FOREACH(ifn) {
2794 if (loopback_scope == 0 && ifn->if_type == IFT_LOOP) {
2795 /* skip loopback interface */
2796 continue;
2797 }
2798
2799 /* go through each interface address */
2800 IFADDR_READER_FOREACH(ifa, ifn) {
2801 /* do i have it implicitly? */
2802 if (sctp_cmpaddr(ifa->ifa_addr, init_addr)) {
2803 #ifdef SCTP_DEBUG
2804 if (sctp_debug_on & SCTP_DEBUG_ASCONF2) {
2805 printf("check_address_list_all: skipping ");
2806 sctp_print_address(ifa->ifa_addr);
2807 }
2808 #endif /* SCTP_DEBUG */
2809 continue;
2810 }
2811 /* check to see if in the init-ack */
2812 if (!sctp_addr_in_initack(stcb, m, offset, length,
2813 ifa->ifa_addr)) {
2814 /* try to add it */
2815 sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb,
2816 ifa, SCTP_ADD_IP_ADDRESS);
2817 }
2818 } /* end foreach ifa */
2819 } /* end foreach ifn */
2820 pserialize_read_exit(s);
2821 }
2822
2823 /*
2824 * validates an init-ack chunk (from a cookie-echo) with current addresses
2825 * adds addresses from the init-ack into our local address list, if needed
2826 * queues asconf adds/deletes addresses as needed and makes appropriate
2827 * list changes for source address selection
2828 * m, offset: points to the start of the address list in an init-ack chunk
2829 * length: total length of the address params only
2830 * init_addr: address where my INIT-ACK was sent from
2831 */
2832 void
2833 sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset,
2834 int length, struct sockaddr *init_addr, uint16_t local_scope,
2835 uint16_t site_scope, uint16_t ipv4_scope, uint16_t loopback_scope)
2836 {
2837
2838 /* process the local addresses in the initack */
2839 sctp_process_initack_addresses(stcb, m, offset, length);
2840
2841 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
2842 /* bound all case */
2843 sctp_check_address_list_all(stcb, m, offset, length, init_addr,
2844 local_scope, site_scope, ipv4_scope, loopback_scope);
2845 } else {
2846 /* subset bound case */
2847 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) {
2848 /* asconf's allowed */
2849 sctp_check_address_list_ep(stcb, m, offset, length,
2850 init_addr);
2851 }
2852 /* else, no asconfs allowed, so what we sent is what we get */
2853 }
2854 }
2855
2856 /*
2857 * sctp_bindx() support
2858 */
2859 uint32_t
2860 sctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, uint16_t type)
2861 {
2862 struct ifaddr *ifa;
2863
2864 if (sa->sa_len == 0)
2865 return (EINVAL);
2866
2867 ifa = sctp_find_ifa_by_addr(sa);
2868 if (ifa != NULL) {
2869 #ifdef INET6
2870 if (ifa->ifa_addr->sa_family == AF_INET6) {
2871 struct in6_ifaddr *ifa6;
2872 ifa6 = (struct in6_ifaddr *)ifa;
2873 if (IFA6_IS_DEPRECATED(ifa6) ||
2874 (ifa6->ia6_flags & (IN6_IFF_DETACHED |
2875 IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))) {
2876 /* Can't bind a non-existent addr. */
2877 return (EINVAL);
2878 }
2879 }
2880 #endif /* INET6 */
2881 /* add this address */
2882 sctp_addr_mgmt_ep(inp, ifa, type);
2883 } else {
2884 /* invalid address! */
2885 #ifdef SCTP_DEBUG
2886 if (sctp_debug_on & SCTP_DEBUG_ASCONF1) {
2887 printf("addr_mgmt_ep_sa: got invalid address!\n");
2888 }
2889 #endif /* SCTP_DEBUG */
2890 return (EADDRNOTAVAIL);
2891 }
2892 return (0);
2893 }
Cache object: e4bcbe220722c7fc12e729fe84ed6f67
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