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