1 /* crypto/bio/bio_dgram.c */
2 /*
3 * DTLS implementation written by Nagendra Modadugu
4 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
5 */
6 /* ====================================================================
7 * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * openssl-core@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60
61 #include <stdio.h>
62 #include <errno.h>
63 #define USE_SOCKETS
64 #include "cryptlib.h"
65
66 #include <openssl/bio.h>
67 #ifndef OPENSSL_NO_DGRAM
68
69 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS)
70 #include <sys/timeb.h>
71 #endif
72
73 #ifndef OPENSSL_NO_SCTP
74 #include <netinet/sctp.h>
75 #include <fcntl.h>
76 #define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
77 #define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
78 #endif
79
80 #if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
81 #define IP_MTU 14 /* linux is lame */
82 #endif
83
84 #if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
85 /* Standard definition causes type-punning problems. */
86 #undef IN6_IS_ADDR_V4MAPPED
87 #define s6_addr32 __u6_addr.__u6_addr32
88 #define IN6_IS_ADDR_V4MAPPED(a) \
89 (((a)->s6_addr32[0] == 0) && \
90 ((a)->s6_addr32[1] == 0) && \
91 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
92 #endif
93
94 #ifdef WATT32
95 #define sock_write SockWrite /* Watt-32 uses same names */
96 #define sock_read SockRead
97 #define sock_puts SockPuts
98 #endif
99
100 static int dgram_write(BIO *h, const char *buf, int num);
101 static int dgram_read(BIO *h, char *buf, int size);
102 static int dgram_puts(BIO *h, const char *str);
103 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
104 static int dgram_new(BIO *h);
105 static int dgram_free(BIO *data);
106 static int dgram_clear(BIO *bio);
107
108 #ifndef OPENSSL_NO_SCTP
109 static int dgram_sctp_write(BIO *h, const char *buf, int num);
110 static int dgram_sctp_read(BIO *h, char *buf, int size);
111 static int dgram_sctp_puts(BIO *h, const char *str);
112 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
113 static int dgram_sctp_new(BIO *h);
114 static int dgram_sctp_free(BIO *data);
115 #ifdef SCTP_AUTHENTICATION_EVENT
116 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp);
117 #endif
118 #endif
119
120 static int BIO_dgram_should_retry(int s);
121
122 static void get_current_time(struct timeval *t);
123
124 static BIO_METHOD methods_dgramp=
125 {
126 BIO_TYPE_DGRAM,
127 "datagram socket",
128 dgram_write,
129 dgram_read,
130 dgram_puts,
131 NULL, /* dgram_gets, */
132 dgram_ctrl,
133 dgram_new,
134 dgram_free,
135 NULL,
136 };
137
138 #ifndef OPENSSL_NO_SCTP
139 static BIO_METHOD methods_dgramp_sctp=
140 {
141 BIO_TYPE_DGRAM_SCTP,
142 "datagram sctp socket",
143 dgram_sctp_write,
144 dgram_sctp_read,
145 dgram_sctp_puts,
146 NULL, /* dgram_gets, */
147 dgram_sctp_ctrl,
148 dgram_sctp_new,
149 dgram_sctp_free,
150 NULL,
151 };
152 #endif
153
154 typedef struct bio_dgram_data_st
155 {
156 union {
157 struct sockaddr sa;
158 struct sockaddr_in sa_in;
159 #if OPENSSL_USE_IPV6
160 struct sockaddr_in6 sa_in6;
161 #endif
162 } peer;
163 unsigned int connected;
164 unsigned int _errno;
165 unsigned int mtu;
166 struct timeval next_timeout;
167 struct timeval socket_timeout;
168 } bio_dgram_data;
169
170 #ifndef OPENSSL_NO_SCTP
171 typedef struct bio_dgram_sctp_save_message_st
172 {
173 BIO *bio;
174 char *data;
175 int length;
176 } bio_dgram_sctp_save_message;
177
178 typedef struct bio_dgram_sctp_data_st
179 {
180 union {
181 struct sockaddr sa;
182 struct sockaddr_in sa_in;
183 #if OPENSSL_USE_IPV6
184 struct sockaddr_in6 sa_in6;
185 #endif
186 } peer;
187 unsigned int connected;
188 unsigned int _errno;
189 unsigned int mtu;
190 struct bio_dgram_sctp_sndinfo sndinfo;
191 struct bio_dgram_sctp_rcvinfo rcvinfo;
192 struct bio_dgram_sctp_prinfo prinfo;
193 void (*handle_notifications)(BIO *bio, void *context, void *buf);
194 void* notification_context;
195 int in_handshake;
196 int ccs_rcvd;
197 int ccs_sent;
198 int save_shutdown;
199 int peer_auth_tested;
200 bio_dgram_sctp_save_message saved_message;
201 } bio_dgram_sctp_data;
202 #endif
203
204 BIO_METHOD *BIO_s_datagram(void)
205 {
206 return(&methods_dgramp);
207 }
208
209 BIO *BIO_new_dgram(int fd, int close_flag)
210 {
211 BIO *ret;
212
213 ret=BIO_new(BIO_s_datagram());
214 if (ret == NULL) return(NULL);
215 BIO_set_fd(ret,fd,close_flag);
216 return(ret);
217 }
218
219 static int dgram_new(BIO *bi)
220 {
221 bio_dgram_data *data = NULL;
222
223 bi->init=0;
224 bi->num=0;
225 data = OPENSSL_malloc(sizeof(bio_dgram_data));
226 if (data == NULL)
227 return 0;
228 memset(data, 0x00, sizeof(bio_dgram_data));
229 bi->ptr = data;
230
231 bi->flags=0;
232 return(1);
233 }
234
235 static int dgram_free(BIO *a)
236 {
237 bio_dgram_data *data;
238
239 if (a == NULL) return(0);
240 if ( ! dgram_clear(a))
241 return 0;
242
243 data = (bio_dgram_data *)a->ptr;
244 if(data != NULL) OPENSSL_free(data);
245
246 return(1);
247 }
248
249 static int dgram_clear(BIO *a)
250 {
251 if (a == NULL) return(0);
252 if (a->shutdown)
253 {
254 if (a->init)
255 {
256 SHUTDOWN2(a->num);
257 }
258 a->init=0;
259 a->flags=0;
260 }
261 return(1);
262 }
263
264 static void dgram_adjust_rcv_timeout(BIO *b)
265 {
266 #if defined(SO_RCVTIMEO)
267 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
268 union { size_t s; int i; } sz = {0};
269
270 /* Is a timer active? */
271 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0)
272 {
273 struct timeval timenow, timeleft;
274
275 /* Read current socket timeout */
276 #ifdef OPENSSL_SYS_WINDOWS
277 int timeout;
278
279 sz.i = sizeof(timeout);
280 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
281 (void*)&timeout, &sz.i) < 0)
282 { perror("getsockopt"); }
283 else
284 {
285 data->socket_timeout.tv_sec = timeout / 1000;
286 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
287 }
288 #else
289 sz.i = sizeof(data->socket_timeout);
290 if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
291 &(data->socket_timeout), (void *)&sz) < 0)
292 { perror("getsockopt"); }
293 else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0)
294 OPENSSL_assert(sz.s<=sizeof(data->socket_timeout));
295 #endif
296
297 /* Get current time */
298 get_current_time(&timenow);
299
300 /* Calculate time left until timer expires */
301 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
302 timeleft.tv_sec -= timenow.tv_sec;
303 timeleft.tv_usec -= timenow.tv_usec;
304 if (timeleft.tv_usec < 0)
305 {
306 timeleft.tv_sec--;
307 timeleft.tv_usec += 1000000;
308 }
309
310 if (timeleft.tv_sec < 0)
311 {
312 timeleft.tv_sec = 0;
313 timeleft.tv_usec = 1;
314 }
315
316 /* Adjust socket timeout if next handhake message timer
317 * will expire earlier.
318 */
319 if ((data->socket_timeout.tv_sec == 0 && data->socket_timeout.tv_usec == 0) ||
320 (data->socket_timeout.tv_sec > timeleft.tv_sec) ||
321 (data->socket_timeout.tv_sec == timeleft.tv_sec &&
322 data->socket_timeout.tv_usec >= timeleft.tv_usec))
323 {
324 #ifdef OPENSSL_SYS_WINDOWS
325 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
326 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
327 (void*)&timeout, sizeof(timeout)) < 0)
328 { perror("setsockopt"); }
329 #else
330 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
331 sizeof(struct timeval)) < 0)
332 { perror("setsockopt"); }
333 #endif
334 }
335 }
336 #endif
337 }
338
339 static void dgram_reset_rcv_timeout(BIO *b)
340 {
341 #if defined(SO_RCVTIMEO)
342 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
343
344 /* Is a timer active? */
345 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0)
346 {
347 #ifdef OPENSSL_SYS_WINDOWS
348 int timeout = data->socket_timeout.tv_sec * 1000 +
349 data->socket_timeout.tv_usec / 1000;
350 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
351 (void*)&timeout, sizeof(timeout)) < 0)
352 { perror("setsockopt"); }
353 #else
354 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
355 sizeof(struct timeval)) < 0)
356 { perror("setsockopt"); }
357 #endif
358 }
359 #endif
360 }
361
362 static int dgram_read(BIO *b, char *out, int outl)
363 {
364 int ret=0;
365 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
366
367 struct {
368 /*
369 * See commentary in b_sock.c. <appro>
370 */
371 union { size_t s; int i; } len;
372 union {
373 struct sockaddr sa;
374 struct sockaddr_in sa_in;
375 #if OPENSSL_USE_IPV6
376 struct sockaddr_in6 sa_in6;
377 #endif
378 } peer;
379 } sa;
380
381 sa.len.s=0;
382 sa.len.i=sizeof(sa.peer);
383
384 if (out != NULL)
385 {
386 clear_socket_error();
387 memset(&sa.peer, 0x00, sizeof(sa.peer));
388 dgram_adjust_rcv_timeout(b);
389 ret=recvfrom(b->num,out,outl,0,&sa.peer.sa,(void *)&sa.len);
390 if (sizeof(sa.len.i)!=sizeof(sa.len.s) && sa.len.i==0)
391 {
392 OPENSSL_assert(sa.len.s<=sizeof(sa.peer));
393 sa.len.i = (int)sa.len.s;
394 }
395
396 if ( ! data->connected && ret >= 0)
397 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
398
399 BIO_clear_retry_flags(b);
400 if (ret < 0)
401 {
402 if (BIO_dgram_should_retry(ret))
403 {
404 BIO_set_retry_read(b);
405 data->_errno = get_last_socket_error();
406 }
407 }
408
409 dgram_reset_rcv_timeout(b);
410 }
411 return(ret);
412 }
413
414 static int dgram_write(BIO *b, const char *in, int inl)
415 {
416 int ret;
417 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
418 clear_socket_error();
419
420 if ( data->connected )
421 ret=writesocket(b->num,in,inl);
422 else
423 {
424 int peerlen = sizeof(data->peer);
425
426 if (data->peer.sa.sa_family == AF_INET)
427 peerlen = sizeof(data->peer.sa_in);
428 #if OPENSSL_USE_IPV6
429 else if (data->peer.sa.sa_family == AF_INET6)
430 peerlen = sizeof(data->peer.sa_in6);
431 #endif
432 #if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
433 ret=sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
434 #else
435 ret=sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
436 #endif
437 }
438
439 BIO_clear_retry_flags(b);
440 if (ret <= 0)
441 {
442 if (BIO_dgram_should_retry(ret))
443 {
444 BIO_set_retry_write(b);
445 data->_errno = get_last_socket_error();
446
447 #if 0 /* higher layers are responsible for querying MTU, if necessary */
448 if ( data->_errno == EMSGSIZE)
449 /* retrieve the new MTU */
450 BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
451 #endif
452 }
453 }
454 return(ret);
455 }
456
457 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
458 {
459 long ret=1;
460 int *ip;
461 struct sockaddr *to = NULL;
462 bio_dgram_data *data = NULL;
463 #if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
464 int sockopt_val = 0;
465 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
466 * modern enough to define socklen_t */
467 socklen_t addr_len;
468 union {
469 struct sockaddr sa;
470 struct sockaddr_in s4;
471 #if OPENSSL_USE_IPV6
472 struct sockaddr_in6 s6;
473 #endif
474 } addr;
475 #endif
476
477 data = (bio_dgram_data *)b->ptr;
478
479 switch (cmd)
480 {
481 case BIO_CTRL_RESET:
482 num=0;
483 case BIO_C_FILE_SEEK:
484 ret=0;
485 break;
486 case BIO_C_FILE_TELL:
487 case BIO_CTRL_INFO:
488 ret=0;
489 break;
490 case BIO_C_SET_FD:
491 dgram_clear(b);
492 b->num= *((int *)ptr);
493 b->shutdown=(int)num;
494 b->init=1;
495 break;
496 case BIO_C_GET_FD:
497 if (b->init)
498 {
499 ip=(int *)ptr;
500 if (ip != NULL) *ip=b->num;
501 ret=b->num;
502 }
503 else
504 ret= -1;
505 break;
506 case BIO_CTRL_GET_CLOSE:
507 ret=b->shutdown;
508 break;
509 case BIO_CTRL_SET_CLOSE:
510 b->shutdown=(int)num;
511 break;
512 case BIO_CTRL_PENDING:
513 case BIO_CTRL_WPENDING:
514 ret=0;
515 break;
516 case BIO_CTRL_DUP:
517 case BIO_CTRL_FLUSH:
518 ret=1;
519 break;
520 case BIO_CTRL_DGRAM_CONNECT:
521 to = (struct sockaddr *)ptr;
522 #if 0
523 if (connect(b->num, to, sizeof(struct sockaddr)) < 0)
524 { perror("connect"); ret = 0; }
525 else
526 {
527 #endif
528 switch (to->sa_family)
529 {
530 case AF_INET:
531 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
532 break;
533 #if OPENSSL_USE_IPV6
534 case AF_INET6:
535 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
536 break;
537 #endif
538 default:
539 memcpy(&data->peer,to,sizeof(data->peer.sa));
540 break;
541 }
542 #if 0
543 }
544 #endif
545 break;
546 /* (Linux)kernel sets DF bit on outgoing IP packets */
547 case BIO_CTRL_DGRAM_MTU_DISCOVER:
548 #if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
549 addr_len = (socklen_t)sizeof(addr);
550 memset((void *)&addr, 0, sizeof(addr));
551 if (getsockname(b->num, &addr.sa, &addr_len) < 0)
552 {
553 ret = 0;
554 break;
555 }
556 switch (addr.sa.sa_family)
557 {
558 case AF_INET:
559 sockopt_val = IP_PMTUDISC_DO;
560 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
561 &sockopt_val, sizeof(sockopt_val))) < 0)
562 perror("setsockopt");
563 break;
564 #if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
565 case AF_INET6:
566 sockopt_val = IPV6_PMTUDISC_DO;
567 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
568 &sockopt_val, sizeof(sockopt_val))) < 0)
569 perror("setsockopt");
570 break;
571 #endif
572 default:
573 ret = -1;
574 break;
575 }
576 ret = -1;
577 #else
578 break;
579 #endif
580 case BIO_CTRL_DGRAM_QUERY_MTU:
581 #if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
582 addr_len = (socklen_t)sizeof(addr);
583 memset((void *)&addr, 0, sizeof(addr));
584 if (getsockname(b->num, &addr.sa, &addr_len) < 0)
585 {
586 ret = 0;
587 break;
588 }
589 sockopt_len = sizeof(sockopt_val);
590 switch (addr.sa.sa_family)
591 {
592 case AF_INET:
593 if ((ret = getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
594 &sockopt_len)) < 0 || sockopt_val < 0)
595 {
596 ret = 0;
597 }
598 else
599 {
600 /* we assume that the transport protocol is UDP and no
601 * IP options are used.
602 */
603 data->mtu = sockopt_val - 8 - 20;
604 ret = data->mtu;
605 }
606 break;
607 #if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
608 case AF_INET6:
609 if ((ret = getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU, (void *)&sockopt_val,
610 &sockopt_len)) < 0 || sockopt_val < 0)
611 {
612 ret = 0;
613 }
614 else
615 {
616 /* we assume that the transport protocol is UDP and no
617 * IPV6 options are used.
618 */
619 data->mtu = sockopt_val - 8 - 40;
620 ret = data->mtu;
621 }
622 break;
623 #endif
624 default:
625 ret = 0;
626 break;
627 }
628 #else
629 ret = 0;
630 #endif
631 break;
632 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
633 switch (data->peer.sa.sa_family)
634 {
635 case AF_INET:
636 ret = 576 - 20 - 8;
637 break;
638 #if OPENSSL_USE_IPV6
639 case AF_INET6:
640 #ifdef IN6_IS_ADDR_V4MAPPED
641 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
642 ret = 576 - 20 - 8;
643 else
644 #endif
645 ret = 1280 - 40 - 8;
646 break;
647 #endif
648 default:
649 ret = 576 - 20 - 8;
650 break;
651 }
652 break;
653 case BIO_CTRL_DGRAM_GET_MTU:
654 return data->mtu;
655 break;
656 case BIO_CTRL_DGRAM_SET_MTU:
657 data->mtu = num;
658 ret = num;
659 break;
660 case BIO_CTRL_DGRAM_SET_CONNECTED:
661 to = (struct sockaddr *)ptr;
662
663 if ( to != NULL)
664 {
665 data->connected = 1;
666 switch (to->sa_family)
667 {
668 case AF_INET:
669 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
670 break;
671 #if OPENSSL_USE_IPV6
672 case AF_INET6:
673 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
674 break;
675 #endif
676 default:
677 memcpy(&data->peer,to,sizeof(data->peer.sa));
678 break;
679 }
680 }
681 else
682 {
683 data->connected = 0;
684 memset(&(data->peer), 0x00, sizeof(data->peer));
685 }
686 break;
687 case BIO_CTRL_DGRAM_GET_PEER:
688 switch (data->peer.sa.sa_family)
689 {
690 case AF_INET:
691 ret=sizeof(data->peer.sa_in);
692 break;
693 #if OPENSSL_USE_IPV6
694 case AF_INET6:
695 ret=sizeof(data->peer.sa_in6);
696 break;
697 #endif
698 default:
699 ret=sizeof(data->peer.sa);
700 break;
701 }
702 if (num==0 || num>ret)
703 num=ret;
704 memcpy(ptr,&data->peer,(ret=num));
705 break;
706 case BIO_CTRL_DGRAM_SET_PEER:
707 to = (struct sockaddr *) ptr;
708 switch (to->sa_family)
709 {
710 case AF_INET:
711 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
712 break;
713 #if OPENSSL_USE_IPV6
714 case AF_INET6:
715 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
716 break;
717 #endif
718 default:
719 memcpy(&data->peer,to,sizeof(data->peer.sa));
720 break;
721 }
722 break;
723 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
724 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
725 break;
726 #if defined(SO_RCVTIMEO)
727 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
728 #ifdef OPENSSL_SYS_WINDOWS
729 {
730 struct timeval *tv = (struct timeval *)ptr;
731 int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
732 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
733 (void*)&timeout, sizeof(timeout)) < 0)
734 { perror("setsockopt"); ret = -1; }
735 }
736 #else
737 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
738 sizeof(struct timeval)) < 0)
739 { perror("setsockopt"); ret = -1; }
740 #endif
741 break;
742 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
743 {
744 union { size_t s; int i; } sz = {0};
745 #ifdef OPENSSL_SYS_WINDOWS
746 int timeout;
747 struct timeval *tv = (struct timeval *)ptr;
748
749 sz.i = sizeof(timeout);
750 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
751 (void*)&timeout, &sz.i) < 0)
752 { perror("getsockopt"); ret = -1; }
753 else
754 {
755 tv->tv_sec = timeout / 1000;
756 tv->tv_usec = (timeout % 1000) * 1000;
757 ret = sizeof(*tv);
758 }
759 #else
760 sz.i = sizeof(struct timeval);
761 if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
762 ptr, (void *)&sz) < 0)
763 { perror("getsockopt"); ret = -1; }
764 else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0)
765 {
766 OPENSSL_assert(sz.s<=sizeof(struct timeval));
767 ret = (int)sz.s;
768 }
769 else
770 ret = sz.i;
771 #endif
772 }
773 break;
774 #endif
775 #if defined(SO_SNDTIMEO)
776 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
777 #ifdef OPENSSL_SYS_WINDOWS
778 {
779 struct timeval *tv = (struct timeval *)ptr;
780 int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
781 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
782 (void*)&timeout, sizeof(timeout)) < 0)
783 { perror("setsockopt"); ret = -1; }
784 }
785 #else
786 if ( setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
787 sizeof(struct timeval)) < 0)
788 { perror("setsockopt"); ret = -1; }
789 #endif
790 break;
791 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
792 {
793 union { size_t s; int i; } sz = {0};
794 #ifdef OPENSSL_SYS_WINDOWS
795 int timeout;
796 struct timeval *tv = (struct timeval *)ptr;
797
798 sz.i = sizeof(timeout);
799 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
800 (void*)&timeout, &sz.i) < 0)
801 { perror("getsockopt"); ret = -1; }
802 else
803 {
804 tv->tv_sec = timeout / 1000;
805 tv->tv_usec = (timeout % 1000) * 1000;
806 ret = sizeof(*tv);
807 }
808 #else
809 sz.i = sizeof(struct timeval);
810 if ( getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
811 ptr, (void *)&sz) < 0)
812 { perror("getsockopt"); ret = -1; }
813 else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0)
814 {
815 OPENSSL_assert(sz.s<=sizeof(struct timeval));
816 ret = (int)sz.s;
817 }
818 else
819 ret = sz.i;
820 #endif
821 }
822 break;
823 #endif
824 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
825 /* fall-through */
826 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
827 #ifdef OPENSSL_SYS_WINDOWS
828 if ( data->_errno == WSAETIMEDOUT)
829 #else
830 if ( data->_errno == EAGAIN)
831 #endif
832 {
833 ret = 1;
834 data->_errno = 0;
835 }
836 else
837 ret = 0;
838 break;
839 #ifdef EMSGSIZE
840 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
841 if ( data->_errno == EMSGSIZE)
842 {
843 ret = 1;
844 data->_errno = 0;
845 }
846 else
847 ret = 0;
848 break;
849 #endif
850 default:
851 ret=0;
852 break;
853 }
854 return(ret);
855 }
856
857 static int dgram_puts(BIO *bp, const char *str)
858 {
859 int n,ret;
860
861 n=strlen(str);
862 ret=dgram_write(bp,str,n);
863 return(ret);
864 }
865
866 #ifndef OPENSSL_NO_SCTP
867 BIO_METHOD *BIO_s_datagram_sctp(void)
868 {
869 return(&methods_dgramp_sctp);
870 }
871
872 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
873 {
874 BIO *bio;
875 int ret, optval = 20000;
876 int auth_data = 0, auth_forward = 0;
877 unsigned char *p;
878 struct sctp_authchunk auth;
879 struct sctp_authchunks *authchunks;
880 socklen_t sockopt_len;
881 #ifdef SCTP_AUTHENTICATION_EVENT
882 #ifdef SCTP_EVENT
883 struct sctp_event event;
884 #else
885 struct sctp_event_subscribe event;
886 #endif
887 #endif
888
889 bio=BIO_new(BIO_s_datagram_sctp());
890 if (bio == NULL) return(NULL);
891 BIO_set_fd(bio,fd,close_flag);
892
893 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
894 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
895 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk));
896 OPENSSL_assert(ret >= 0);
897 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
898 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk));
899 OPENSSL_assert(ret >= 0);
900
901 /* Test if activation was successful. When using accept(),
902 * SCTP-AUTH has to be activated for the listening socket
903 * already, otherwise the connected socket won't use it. */
904 sockopt_len = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
905 authchunks = OPENSSL_malloc(sockopt_len);
906 memset(authchunks, 0, sizeof(sockopt_len));
907 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks, &sockopt_len);
908 OPENSSL_assert(ret >= 0);
909
910 for (p = (unsigned char*) authchunks->gauth_chunks;
911 p < (unsigned char*) authchunks + sockopt_len;
912 p += sizeof(uint8_t))
913 {
914 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1;
915 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1;
916 }
917
918 OPENSSL_free(authchunks);
919
920 OPENSSL_assert(auth_data);
921 OPENSSL_assert(auth_forward);
922
923 #ifdef SCTP_AUTHENTICATION_EVENT
924 #ifdef SCTP_EVENT
925 memset(&event, 0, sizeof(struct sctp_event));
926 event.se_assoc_id = 0;
927 event.se_type = SCTP_AUTHENTICATION_EVENT;
928 event.se_on = 1;
929 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
930 OPENSSL_assert(ret >= 0);
931 #else
932 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
933 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
934 OPENSSL_assert(ret >= 0);
935
936 event.sctp_authentication_event = 1;
937
938 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
939 OPENSSL_assert(ret >= 0);
940 #endif
941 #endif
942
943 /* Disable partial delivery by setting the min size
944 * larger than the max record size of 2^14 + 2048 + 13
945 */
946 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval, sizeof(optval));
947 OPENSSL_assert(ret >= 0);
948
949 return(bio);
950 }
951
952 int BIO_dgram_is_sctp(BIO *bio)
953 {
954 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
955 }
956
957 static int dgram_sctp_new(BIO *bi)
958 {
959 bio_dgram_sctp_data *data = NULL;
960
961 bi->init=0;
962 bi->num=0;
963 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
964 if (data == NULL)
965 return 0;
966 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
967 #ifdef SCTP_PR_SCTP_NONE
968 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
969 #endif
970 bi->ptr = data;
971
972 bi->flags=0;
973 return(1);
974 }
975
976 static int dgram_sctp_free(BIO *a)
977 {
978 bio_dgram_sctp_data *data;
979
980 if (a == NULL) return(0);
981 if ( ! dgram_clear(a))
982 return 0;
983
984 data = (bio_dgram_sctp_data *)a->ptr;
985 if(data != NULL) OPENSSL_free(data);
986
987 return(1);
988 }
989
990 #ifdef SCTP_AUTHENTICATION_EVENT
991 void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp)
992 {
993 int ret;
994 struct sctp_authkey_event* authkeyevent = &snp->sn_auth_event;
995
996 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY)
997 {
998 struct sctp_authkeyid authkeyid;
999
1000 /* delete key */
1001 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1002 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1003 &authkeyid, sizeof(struct sctp_authkeyid));
1004 }
1005 }
1006 #endif
1007
1008 static int dgram_sctp_read(BIO *b, char *out, int outl)
1009 {
1010 int ret = 0, n = 0, i, optval;
1011 socklen_t optlen;
1012 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1013 union sctp_notification *snp;
1014 struct msghdr msg;
1015 struct iovec iov;
1016 struct cmsghdr *cmsg;
1017 char cmsgbuf[512];
1018
1019 if (out != NULL)
1020 {
1021 clear_socket_error();
1022
1023 do
1024 {
1025 memset(&data->rcvinfo, 0x00, sizeof(struct bio_dgram_sctp_rcvinfo));
1026 iov.iov_base = out;
1027 iov.iov_len = outl;
1028 msg.msg_name = NULL;
1029 msg.msg_namelen = 0;
1030 msg.msg_iov = &iov;
1031 msg.msg_iovlen = 1;
1032 msg.msg_control = cmsgbuf;
1033 msg.msg_controllen = 512;
1034 msg.msg_flags = 0;
1035 n = recvmsg(b->num, &msg, 0);
1036
1037 if (msg.msg_controllen > 0)
1038 {
1039 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg))
1040 {
1041 if (cmsg->cmsg_level != IPPROTO_SCTP)
1042 continue;
1043 #ifdef SCTP_RCVINFO
1044 if (cmsg->cmsg_type == SCTP_RCVINFO)
1045 {
1046 struct sctp_rcvinfo *rcvinfo;
1047
1048 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1049 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1050 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1051 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1052 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1053 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1054 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1055 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1056 }
1057 #endif
1058 #ifdef SCTP_SNDRCV
1059 if (cmsg->cmsg_type == SCTP_SNDRCV)
1060 {
1061 struct sctp_sndrcvinfo *sndrcvinfo;
1062
1063 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1064 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1065 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1066 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1067 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1068 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1069 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1070 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1071 }
1072 #endif
1073 }
1074 }
1075
1076 if (n <= 0)
1077 {
1078 if (n < 0)
1079 ret = n;
1080 break;
1081 }
1082
1083 if (msg.msg_flags & MSG_NOTIFICATION)
1084 {
1085 snp = (union sctp_notification*) out;
1086 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT)
1087 {
1088 #ifdef SCTP_EVENT
1089 struct sctp_event event;
1090 #else
1091 struct sctp_event_subscribe event;
1092 socklen_t eventsize;
1093 #endif
1094 /* If a message has been delayed until the socket
1095 * is dry, it can be sent now.
1096 */
1097 if (data->saved_message.length > 0)
1098 {
1099 dgram_sctp_write(data->saved_message.bio, data->saved_message.data,
1100 data->saved_message.length);
1101 OPENSSL_free(data->saved_message.data);
1102 data->saved_message.length = 0;
1103 }
1104
1105 /* disable sender dry event */
1106 #ifdef SCTP_EVENT
1107 memset(&event, 0, sizeof(struct sctp_event));
1108 event.se_assoc_id = 0;
1109 event.se_type = SCTP_SENDER_DRY_EVENT;
1110 event.se_on = 0;
1111 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1112 OPENSSL_assert(i >= 0);
1113 #else
1114 eventsize = sizeof(struct sctp_event_subscribe);
1115 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1116 OPENSSL_assert(i >= 0);
1117
1118 event.sctp_sender_dry_event = 0;
1119
1120 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1121 OPENSSL_assert(i >= 0);
1122 #endif
1123 }
1124
1125 #ifdef SCTP_AUTHENTICATION_EVENT
1126 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1127 dgram_sctp_handle_auth_free_key_event(b, snp);
1128 #endif
1129
1130 if (data->handle_notifications != NULL)
1131 data->handle_notifications(b, data->notification_context, (void*) out);
1132
1133 memset(out, 0, outl);
1134 }
1135 else
1136 ret += n;
1137 }
1138 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR) && (ret < outl));
1139
1140 if (ret > 0 && !(msg.msg_flags & MSG_EOR))
1141 {
1142 /* Partial message read, this should never happen! */
1143
1144 /* The buffer was too small, this means the peer sent
1145 * a message that was larger than allowed. */
1146 if (ret == outl)
1147 return -1;
1148
1149 /* Test if socket buffer can handle max record
1150 * size (2^14 + 2048 + 13)
1151 */
1152 optlen = (socklen_t) sizeof(int);
1153 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1154 OPENSSL_assert(ret >= 0);
1155 OPENSSL_assert(optval >= 18445);
1156
1157 /* Test if SCTP doesn't partially deliver below
1158 * max record size (2^14 + 2048 + 13)
1159 */
1160 optlen = (socklen_t) sizeof(int);
1161 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1162 &optval, &optlen);
1163 OPENSSL_assert(ret >= 0);
1164 OPENSSL_assert(optval >= 18445);
1165
1166 /* Partially delivered notification??? Probably a bug.... */
1167 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1168
1169 /* Everything seems ok till now, so it's most likely
1170 * a message dropped by PR-SCTP.
1171 */
1172 memset(out, 0, outl);
1173 BIO_set_retry_read(b);
1174 return -1;
1175 }
1176
1177 BIO_clear_retry_flags(b);
1178 if (ret < 0)
1179 {
1180 if (BIO_dgram_should_retry(ret))
1181 {
1182 BIO_set_retry_read(b);
1183 data->_errno = get_last_socket_error();
1184 }
1185 }
1186
1187 /* Test if peer uses SCTP-AUTH before continuing */
1188 if (!data->peer_auth_tested)
1189 {
1190 int ii, auth_data = 0, auth_forward = 0;
1191 unsigned char *p;
1192 struct sctp_authchunks *authchunks;
1193
1194 optlen = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1195 authchunks = OPENSSL_malloc(optlen);
1196 memset(authchunks, 0, sizeof(optlen));
1197 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS, authchunks, &optlen);
1198 OPENSSL_assert(ii >= 0);
1199
1200 for (p = (unsigned char*) authchunks->gauth_chunks;
1201 p < (unsigned char*) authchunks + optlen;
1202 p += sizeof(uint8_t))
1203 {
1204 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1;
1205 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1;
1206 }
1207
1208 OPENSSL_free(authchunks);
1209
1210 if (!auth_data || !auth_forward)
1211 {
1212 BIOerr(BIO_F_DGRAM_SCTP_READ,BIO_R_CONNECT_ERROR);
1213 return -1;
1214 }
1215
1216 data->peer_auth_tested = 1;
1217 }
1218 }
1219 return(ret);
1220 }
1221
1222 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1223 {
1224 int ret;
1225 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1226 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1227 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1228 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1229 struct iovec iov[1];
1230 struct msghdr msg;
1231 struct cmsghdr *cmsg;
1232 #if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1233 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) + CMSG_SPACE(sizeof(struct sctp_prinfo))];
1234 struct sctp_sndinfo *sndinfo;
1235 struct sctp_prinfo *prinfo;
1236 #else
1237 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1238 struct sctp_sndrcvinfo *sndrcvinfo;
1239 #endif
1240
1241 clear_socket_error();
1242
1243 /* If we're send anything else than application data,
1244 * disable all user parameters and flags.
1245 */
1246 if (in[0] != 23) {
1247 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1248 #ifdef SCTP_SACK_IMMEDIATELY
1249 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1250 #endif
1251 sinfo = &handshake_sinfo;
1252 }
1253
1254 /* If we have to send a shutdown alert message and the
1255 * socket is not dry yet, we have to save it and send it
1256 * as soon as the socket gets dry.
1257 */
1258 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b))
1259 {
1260 data->saved_message.bio = b;
1261 data->saved_message.length = inl;
1262 data->saved_message.data = OPENSSL_malloc(inl);
1263 memcpy(data->saved_message.data, in, inl);
1264 return inl;
1265 }
1266
1267 iov[0].iov_base = (char *)in;
1268 iov[0].iov_len = inl;
1269 msg.msg_name = NULL;
1270 msg.msg_namelen = 0;
1271 msg.msg_iov = iov;
1272 msg.msg_iovlen = 1;
1273 msg.msg_control = (caddr_t)cmsgbuf;
1274 msg.msg_controllen = 0;
1275 msg.msg_flags = 0;
1276 #if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1277 cmsg = (struct cmsghdr *)cmsgbuf;
1278 cmsg->cmsg_level = IPPROTO_SCTP;
1279 cmsg->cmsg_type = SCTP_SNDINFO;
1280 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1281 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1282 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1283 sndinfo->snd_sid = sinfo->snd_sid;
1284 sndinfo->snd_flags = sinfo->snd_flags;
1285 sndinfo->snd_ppid = sinfo->snd_ppid;
1286 sndinfo->snd_context = sinfo->snd_context;
1287 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1288
1289 cmsg = (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1290 cmsg->cmsg_level = IPPROTO_SCTP;
1291 cmsg->cmsg_type = SCTP_PRINFO;
1292 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1293 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1294 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1295 prinfo->pr_policy = pinfo->pr_policy;
1296 prinfo->pr_value = pinfo->pr_value;
1297 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1298 #else
1299 cmsg = (struct cmsghdr *)cmsgbuf;
1300 cmsg->cmsg_level = IPPROTO_SCTP;
1301 cmsg->cmsg_type = SCTP_SNDRCV;
1302 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1303 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1304 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1305 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1306 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1307 #ifdef __FreeBSD__
1308 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1309 #endif
1310 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1311 sndrcvinfo->sinfo_context = sinfo->snd_context;
1312 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1313 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1314 #endif
1315
1316 ret = sendmsg(b->num, &msg, 0);
1317
1318 BIO_clear_retry_flags(b);
1319 if (ret <= 0)
1320 {
1321 if (BIO_dgram_should_retry(ret))
1322 {
1323 BIO_set_retry_write(b);
1324 data->_errno = get_last_socket_error();
1325 }
1326 }
1327 return(ret);
1328 }
1329
1330 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1331 {
1332 long ret=1;
1333 bio_dgram_sctp_data *data = NULL;
1334 socklen_t sockopt_len = 0;
1335 struct sctp_authkeyid authkeyid;
1336 struct sctp_authkey *authkey = NULL;
1337
1338 data = (bio_dgram_sctp_data *)b->ptr;
1339
1340 switch (cmd)
1341 {
1342 case BIO_CTRL_DGRAM_QUERY_MTU:
1343 /* Set to maximum (2^14)
1344 * and ignore user input to enable transport
1345 * protocol fragmentation.
1346 * Returns always 2^14.
1347 */
1348 data->mtu = 16384;
1349 ret = data->mtu;
1350 break;
1351 case BIO_CTRL_DGRAM_SET_MTU:
1352 /* Set to maximum (2^14)
1353 * and ignore input to enable transport
1354 * protocol fragmentation.
1355 * Returns always 2^14.
1356 */
1357 data->mtu = 16384;
1358 ret = data->mtu;
1359 break;
1360 case BIO_CTRL_DGRAM_SET_CONNECTED:
1361 case BIO_CTRL_DGRAM_CONNECT:
1362 /* Returns always -1. */
1363 ret = -1;
1364 break;
1365 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1366 /* SCTP doesn't need the DTLS timer
1367 * Returns always 1.
1368 */
1369 break;
1370 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1371 if (num > 0)
1372 data->in_handshake = 1;
1373 else
1374 data->in_handshake = 0;
1375
1376 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY, &data->in_handshake, sizeof(int));
1377 break;
1378 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1379 /* New shared key for SCTP AUTH.
1380 * Returns 0 on success, -1 otherwise.
1381 */
1382
1383 /* Get active key */
1384 sockopt_len = sizeof(struct sctp_authkeyid);
1385 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1386 if (ret < 0) break;
1387
1388 /* Add new key */
1389 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1390 authkey = OPENSSL_malloc(sockopt_len);
1391 if (authkey == NULL)
1392 {
1393 ret = -1;
1394 break;
1395 }
1396 memset(authkey, 0x00, sockopt_len);
1397 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1398 #ifndef __FreeBSD__
1399 /* This field is missing in FreeBSD 8.2 and earlier,
1400 * and FreeBSD 8.3 and higher work without it.
1401 */
1402 authkey->sca_keylength = 64;
1403 #endif
1404 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1405
1406 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey, sockopt_len);
1407 OPENSSL_free(authkey);
1408 authkey = NULL;
1409 if (ret < 0) break;
1410
1411 /* Reset active key */
1412 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1413 &authkeyid, sizeof(struct sctp_authkeyid));
1414 if (ret < 0) break;
1415
1416 break;
1417 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1418 /* Returns 0 on success, -1 otherwise. */
1419
1420 /* Get active key */
1421 sockopt_len = sizeof(struct sctp_authkeyid);
1422 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1423 if (ret < 0) break;
1424
1425 /* Set active key */
1426 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1427 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1428 &authkeyid, sizeof(struct sctp_authkeyid));
1429 if (ret < 0) break;
1430
1431 /* CCS has been sent, so remember that and fall through
1432 * to check if we need to deactivate an old key
1433 */
1434 data->ccs_sent = 1;
1435
1436 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1437 /* Returns 0 on success, -1 otherwise. */
1438
1439 /* Has this command really been called or is this just a fall-through? */
1440 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1441 data->ccs_rcvd = 1;
1442
1443 /* CSS has been both, received and sent, so deactivate an old key */
1444 if (data->ccs_rcvd == 1 && data->ccs_sent == 1)
1445 {
1446 /* Get active key */
1447 sockopt_len = sizeof(struct sctp_authkeyid);
1448 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1449 if (ret < 0) break;
1450
1451 /* Deactivate key or delete second last key if
1452 * SCTP_AUTHENTICATION_EVENT is not available.
1453 */
1454 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1455 #ifdef SCTP_AUTH_DEACTIVATE_KEY
1456 sockopt_len = sizeof(struct sctp_authkeyid);
1457 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1458 &authkeyid, sockopt_len);
1459 if (ret < 0) break;
1460 #endif
1461 #ifndef SCTP_AUTHENTICATION_EVENT
1462 if (authkeyid.scact_keynumber > 0)
1463 {
1464 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1465 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1466 &authkeyid, sizeof(struct sctp_authkeyid));
1467 if (ret < 0) break;
1468 }
1469 #endif
1470
1471 data->ccs_rcvd = 0;
1472 data->ccs_sent = 0;
1473 }
1474 break;
1475 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1476 /* Returns the size of the copied struct. */
1477 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo))
1478 num = sizeof(struct bio_dgram_sctp_sndinfo);
1479
1480 memcpy(ptr, &(data->sndinfo), num);
1481 ret = num;
1482 break;
1483 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1484 /* Returns the size of the copied struct. */
1485 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo))
1486 num = sizeof(struct bio_dgram_sctp_sndinfo);
1487
1488 memcpy(&(data->sndinfo), ptr, num);
1489 break;
1490 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1491 /* Returns the size of the copied struct. */
1492 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo))
1493 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1494
1495 memcpy(ptr, &data->rcvinfo, num);
1496
1497 ret = num;
1498 break;
1499 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1500 /* Returns the size of the copied struct. */
1501 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo))
1502 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1503
1504 memcpy(&(data->rcvinfo), ptr, num);
1505 break;
1506 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1507 /* Returns the size of the copied struct. */
1508 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo))
1509 num = sizeof(struct bio_dgram_sctp_prinfo);
1510
1511 memcpy(ptr, &(data->prinfo), num);
1512 ret = num;
1513 break;
1514 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1515 /* Returns the size of the copied struct. */
1516 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo))
1517 num = sizeof(struct bio_dgram_sctp_prinfo);
1518
1519 memcpy(&(data->prinfo), ptr, num);
1520 break;
1521 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1522 /* Returns always 1. */
1523 if (num > 0)
1524 data->save_shutdown = 1;
1525 else
1526 data->save_shutdown = 0;
1527 break;
1528
1529 default:
1530 /* Pass to default ctrl function to
1531 * process SCTP unspecific commands
1532 */
1533 ret=dgram_ctrl(b, cmd, num, ptr);
1534 break;
1535 }
1536 return(ret);
1537 }
1538
1539 int BIO_dgram_sctp_notification_cb(BIO *b,
1540 void (*handle_notifications)(BIO *bio, void *context, void *buf),
1541 void *context)
1542 {
1543 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1544
1545 if (handle_notifications != NULL)
1546 {
1547 data->handle_notifications = handle_notifications;
1548 data->notification_context = context;
1549 }
1550 else
1551 return -1;
1552
1553 return 0;
1554 }
1555
1556 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1557 {
1558 int is_dry = 0;
1559 int n, sockflags, ret;
1560 union sctp_notification snp;
1561 struct msghdr msg;
1562 struct iovec iov;
1563 #ifdef SCTP_EVENT
1564 struct sctp_event event;
1565 #else
1566 struct sctp_event_subscribe event;
1567 socklen_t eventsize;
1568 #endif
1569 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1570
1571 /* set sender dry event */
1572 #ifdef SCTP_EVENT
1573 memset(&event, 0, sizeof(struct sctp_event));
1574 event.se_assoc_id = 0;
1575 event.se_type = SCTP_SENDER_DRY_EVENT;
1576 event.se_on = 1;
1577 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1578 #else
1579 eventsize = sizeof(struct sctp_event_subscribe);
1580 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1581 if (ret < 0)
1582 return -1;
1583
1584 event.sctp_sender_dry_event = 1;
1585
1586 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1587 #endif
1588 if (ret < 0)
1589 return -1;
1590
1591 /* peek for notification */
1592 memset(&snp, 0x00, sizeof(union sctp_notification));
1593 iov.iov_base = (char *)&snp;
1594 iov.iov_len = sizeof(union sctp_notification);
1595 msg.msg_name = NULL;
1596 msg.msg_namelen = 0;
1597 msg.msg_iov = &iov;
1598 msg.msg_iovlen = 1;
1599 msg.msg_control = NULL;
1600 msg.msg_controllen = 0;
1601 msg.msg_flags = 0;
1602
1603 n = recvmsg(b->num, &msg, MSG_PEEK);
1604 if (n <= 0)
1605 {
1606 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1607 return -1;
1608 else
1609 return 0;
1610 }
1611
1612 /* if we find a notification, process it and try again if necessary */
1613 while (msg.msg_flags & MSG_NOTIFICATION)
1614 {
1615 memset(&snp, 0x00, sizeof(union sctp_notification));
1616 iov.iov_base = (char *)&snp;
1617 iov.iov_len = sizeof(union sctp_notification);
1618 msg.msg_name = NULL;
1619 msg.msg_namelen = 0;
1620 msg.msg_iov = &iov;
1621 msg.msg_iovlen = 1;
1622 msg.msg_control = NULL;
1623 msg.msg_controllen = 0;
1624 msg.msg_flags = 0;
1625
1626 n = recvmsg(b->num, &msg, 0);
1627 if (n <= 0)
1628 {
1629 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1630 return -1;
1631 else
1632 return is_dry;
1633 }
1634
1635 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT)
1636 {
1637 is_dry = 1;
1638
1639 /* disable sender dry event */
1640 #ifdef SCTP_EVENT
1641 memset(&event, 0, sizeof(struct sctp_event));
1642 event.se_assoc_id = 0;
1643 event.se_type = SCTP_SENDER_DRY_EVENT;
1644 event.se_on = 0;
1645 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1646 #else
1647 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1648 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1649 if (ret < 0)
1650 return -1;
1651
1652 event.sctp_sender_dry_event = 0;
1653
1654 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1655 #endif
1656 if (ret < 0)
1657 return -1;
1658 }
1659
1660 #ifdef SCTP_AUTHENTICATION_EVENT
1661 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1662 dgram_sctp_handle_auth_free_key_event(b, &snp);
1663 #endif
1664
1665 if (data->handle_notifications != NULL)
1666 data->handle_notifications(b, data->notification_context, (void*) &snp);
1667
1668 /* found notification, peek again */
1669 memset(&snp, 0x00, sizeof(union sctp_notification));
1670 iov.iov_base = (char *)&snp;
1671 iov.iov_len = sizeof(union sctp_notification);
1672 msg.msg_name = NULL;
1673 msg.msg_namelen = 0;
1674 msg.msg_iov = &iov;
1675 msg.msg_iovlen = 1;
1676 msg.msg_control = NULL;
1677 msg.msg_controllen = 0;
1678 msg.msg_flags = 0;
1679
1680 /* if we have seen the dry already, don't wait */
1681 if (is_dry)
1682 {
1683 sockflags = fcntl(b->num, F_GETFL, 0);
1684 fcntl(b->num, F_SETFL, O_NONBLOCK);
1685 }
1686
1687 n = recvmsg(b->num, &msg, MSG_PEEK);
1688
1689 if (is_dry)
1690 {
1691 fcntl(b->num, F_SETFL, sockflags);
1692 }
1693
1694 if (n <= 0)
1695 {
1696 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1697 return -1;
1698 else
1699 return is_dry;
1700 }
1701 }
1702
1703 /* read anything else */
1704 return is_dry;
1705 }
1706
1707 int BIO_dgram_sctp_msg_waiting(BIO *b)
1708 {
1709 int n, sockflags;
1710 union sctp_notification snp;
1711 struct msghdr msg;
1712 struct iovec iov;
1713 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1714
1715 /* Check if there are any messages waiting to be read */
1716 do
1717 {
1718 memset(&snp, 0x00, sizeof(union sctp_notification));
1719 iov.iov_base = (char *)&snp;
1720 iov.iov_len = sizeof(union sctp_notification);
1721 msg.msg_name = NULL;
1722 msg.msg_namelen = 0;
1723 msg.msg_iov = &iov;
1724 msg.msg_iovlen = 1;
1725 msg.msg_control = NULL;
1726 msg.msg_controllen = 0;
1727 msg.msg_flags = 0;
1728
1729 sockflags = fcntl(b->num, F_GETFL, 0);
1730 fcntl(b->num, F_SETFL, O_NONBLOCK);
1731 n = recvmsg(b->num, &msg, MSG_PEEK);
1732 fcntl(b->num, F_SETFL, sockflags);
1733
1734 /* if notification, process and try again */
1735 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION))
1736 {
1737 #ifdef SCTP_AUTHENTICATION_EVENT
1738 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1739 dgram_sctp_handle_auth_free_key_event(b, &snp);
1740 #endif
1741
1742 memset(&snp, 0x00, sizeof(union sctp_notification));
1743 iov.iov_base = (char *)&snp;
1744 iov.iov_len = sizeof(union sctp_notification);
1745 msg.msg_name = NULL;
1746 msg.msg_namelen = 0;
1747 msg.msg_iov = &iov;
1748 msg.msg_iovlen = 1;
1749 msg.msg_control = NULL;
1750 msg.msg_controllen = 0;
1751 msg.msg_flags = 0;
1752 n = recvmsg(b->num, &msg, 0);
1753
1754 if (data->handle_notifications != NULL)
1755 data->handle_notifications(b, data->notification_context, (void*) &snp);
1756 }
1757
1758 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1759
1760 /* Return 1 if there is a message to be read, return 0 otherwise. */
1761 if (n > 0)
1762 return 1;
1763 else
1764 return 0;
1765 }
1766
1767 static int dgram_sctp_puts(BIO *bp, const char *str)
1768 {
1769 int n,ret;
1770
1771 n=strlen(str);
1772 ret=dgram_sctp_write(bp,str,n);
1773 return(ret);
1774 }
1775 #endif
1776
1777 static int BIO_dgram_should_retry(int i)
1778 {
1779 int err;
1780
1781 if ((i == 0) || (i == -1))
1782 {
1783 err=get_last_socket_error();
1784
1785 #if defined(OPENSSL_SYS_WINDOWS)
1786 /* If the socket return value (i) is -1
1787 * and err is unexpectedly 0 at this point,
1788 * the error code was overwritten by
1789 * another system call before this error
1790 * handling is called.
1791 */
1792 #endif
1793
1794 return(BIO_dgram_non_fatal_error(err));
1795 }
1796 return(0);
1797 }
1798
1799 int BIO_dgram_non_fatal_error(int err)
1800 {
1801 switch (err)
1802 {
1803 #if defined(OPENSSL_SYS_WINDOWS)
1804 # if defined(WSAEWOULDBLOCK)
1805 case WSAEWOULDBLOCK:
1806 # endif
1807
1808 # if 0 /* This appears to always be an error */
1809 # if defined(WSAENOTCONN)
1810 case WSAENOTCONN:
1811 # endif
1812 # endif
1813 #endif
1814
1815 #ifdef EWOULDBLOCK
1816 # ifdef WSAEWOULDBLOCK
1817 # if WSAEWOULDBLOCK != EWOULDBLOCK
1818 case EWOULDBLOCK:
1819 # endif
1820 # else
1821 case EWOULDBLOCK:
1822 # endif
1823 #endif
1824
1825 #ifdef EINTR
1826 case EINTR:
1827 #endif
1828
1829 #ifdef EAGAIN
1830 #if EWOULDBLOCK != EAGAIN
1831 case EAGAIN:
1832 # endif
1833 #endif
1834
1835 #ifdef EPROTO
1836 case EPROTO:
1837 #endif
1838
1839 #ifdef EINPROGRESS
1840 case EINPROGRESS:
1841 #endif
1842
1843 #ifdef EALREADY
1844 case EALREADY:
1845 #endif
1846
1847 return(1);
1848 /* break; */
1849 default:
1850 break;
1851 }
1852 return(0);
1853 }
1854
1855 static void get_current_time(struct timeval *t)
1856 {
1857 #ifdef OPENSSL_SYS_WIN32
1858 struct _timeb tb;
1859 _ftime(&tb);
1860 t->tv_sec = (long)tb.time;
1861 t->tv_usec = (long)tb.millitm * 1000;
1862 #elif defined(OPENSSL_SYS_VMS)
1863 struct timeb tb;
1864 ftime(&tb);
1865 t->tv_sec = (long)tb.time;
1866 t->tv_usec = (long)tb.millitm * 1000;
1867 #else
1868 gettimeofday(t, NULL);
1869 #endif
1870 }
1871
1872 #endif