]> git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/bio/bss_dgram.c
projects / thirdparty / openssl.git / blob
? search:


4fa6279d05fe8c97117ad742a879a5c15b0f182b
[thirdparty/openssl.git] / crypto / bio / bss_dgram.c
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 #include <stdio.h>
61 #include <errno.h>
62 #define USE_SOCKETS
63 #include "cryptlib.h"
64
65 #include <openssl/bio.h>
66 #ifndef OPENSSL_NO_DGRAM
67
68 # if !(defined(_WIN32) || defined(OPENSSL_SYS_VMS))
69 # include <sys/time.h>
70 # endif
71 # if defined(OPENSSL_SYS_VMS)
72 # include <sys/timeb.h>
73 # endif
74
75 # ifndef OPENSSL_NO_SCTP
76 # include <netinet/sctp.h>
77 # include <fcntl.h>
78 # define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
79 # define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
80 # endif
81
82 # if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
83 # define IP_MTU 14 /* linux is lame */
84 # endif
85
86 # if OPENSSL_USE_IPV6 && !defined(IPPROTO_IPV6)
87 # define IPPROTO_IPV6 41 /* windows is lame */
88 # endif
89
90 # if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
91 /* Standard definition causes type-punning problems. */
92 # undef IN6_IS_ADDR_V4MAPPED
93 # define s6_addr32 __u6_addr.__u6_addr32
94 # define IN6_IS_ADDR_V4MAPPED(a) \
95 (((a)->s6_addr32[0] == 0) && \
96 ((a)->s6_addr32[1] == 0) && \
97 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
98 # endif
99
100 # ifdef WATT32
101 # define sock_write SockWrite /* Watt-32 uses same names */
102 # define sock_read SockRead
103 # define sock_puts SockPuts
104 # endif
105
106 static int dgram_write(BIO *h, const char *buf, int num);
107 static int dgram_read(BIO *h, char *buf, int size);
108 static int dgram_puts(BIO *h, const char *str);
109 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
110 static int dgram_new(BIO *h);
111 static int dgram_free(BIO *data);
112 static int dgram_clear(BIO *bio);
113
114 # ifndef OPENSSL_NO_SCTP
115 static int dgram_sctp_write(BIO *h, const char *buf, int num);
116 static int dgram_sctp_read(BIO *h, char *buf, int size);
117 static int dgram_sctp_puts(BIO *h, const char *str);
118 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
119 static int dgram_sctp_new(BIO *h);
120 static int dgram_sctp_free(BIO *data);
121 # ifdef SCTP_AUTHENTICATION_EVENT
122 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification
123 *snp);
124 # endif
125 # endif
126
127 static int BIO_dgram_should_retry(int s);
128
129 static void get_current_time(struct timeval *t);
130
131 static BIO_METHOD methods_dgramp = {
132 BIO_TYPE_DGRAM,
133 "datagram socket",
134 dgram_write,
135 dgram_read,
136 dgram_puts,
137 NULL, /* dgram_gets, */
138 dgram_ctrl,
139 dgram_new,
140 dgram_free,
141 NULL,
142 };
143
144 # ifndef OPENSSL_NO_SCTP
145 static BIO_METHOD methods_dgramp_sctp = {
146 BIO_TYPE_DGRAM_SCTP,
147 "datagram sctp socket",
148 dgram_sctp_write,
149 dgram_sctp_read,
150 dgram_sctp_puts,
151 NULL, /* dgram_gets, */
152 dgram_sctp_ctrl,
153 dgram_sctp_new,
154 dgram_sctp_free,
155 NULL,
156 };
157 # endif
158
159 typedef struct bio_dgram_data_st {
160 union {
161 struct sockaddr sa;
162 struct sockaddr_in sa_in;
163 # if OPENSSL_USE_IPV6
164 struct sockaddr_in6 sa_in6;
165 # endif
166 } peer;
167 unsigned int connected;
168 unsigned int _errno;
169 unsigned int mtu;
170 struct timeval next_timeout;
171 struct timeval socket_timeout;
172 } bio_dgram_data;
173
174 # ifndef OPENSSL_NO_SCTP
175 typedef struct bio_dgram_sctp_save_message_st {
176 BIO *bio;
177 char *data;
178 int length;
179 } bio_dgram_sctp_save_message;
180
181 typedef struct bio_dgram_sctp_data_st {
182 union {
183 struct sockaddr sa;
184 struct sockaddr_in sa_in;
185 # if OPENSSL_USE_IPV6
186 struct sockaddr_in6 sa_in6;
187 # endif
188 } peer;
189 unsigned int connected;
190 unsigned int _errno;
191 unsigned int mtu;
192 struct bio_dgram_sctp_sndinfo sndinfo;
193 struct bio_dgram_sctp_rcvinfo rcvinfo;
194 struct bio_dgram_sctp_prinfo prinfo;
195 void (*handle_notifications) (BIO *bio, void *context, void *buf);
196 void *notification_context;
197 int in_handshake;
198 int ccs_rcvd;
199 int ccs_sent;
200 int save_shutdown;
201 int peer_auth_tested;
202 bio_dgram_sctp_save_message saved_message;
203 } bio_dgram_sctp_data;
204 # endif
205
206 BIO_METHOD *BIO_s_datagram(void)
207 {
208 return (&methods_dgramp);
209 }
210
211 BIO *BIO_new_dgram(int fd, int close_flag)
212 {
213 BIO *ret;
214
215 ret = BIO_new(BIO_s_datagram());
216 if (ret == NULL)
217 return (NULL);
218 BIO_set_fd(ret, fd, close_flag);
219 return (ret);
220 }
221
222 static int dgram_new(BIO *bi)
223 {
224 bio_dgram_data *data = NULL;
225
226 bi->init = 0;
227 bi->num = 0;
228 data = OPENSSL_malloc(sizeof(bio_dgram_data));
229 if (data == NULL)
230 return 0;
231 memset(data, 0x00, sizeof(bio_dgram_data));
232 bi->ptr = data;
233
234 bi->flags = 0;
235 return (1);
236 }
237
238 static int dgram_free(BIO *a)
239 {
240 bio_dgram_data *data;
241
242 if (a == NULL)
243 return (0);
244 if (!dgram_clear(a))
245 return 0;
246
247 data = (bio_dgram_data *)a->ptr;
248 if (data != NULL)
249 OPENSSL_free(data);
250
251 return (1);
252 }
253
254 static int dgram_clear(BIO *a)
255 {
256 if (a == NULL)
257 return (0);
258 if (a->shutdown) {
259 if (a->init) {
260 SHUTDOWN2(a->num);
261 }
262 a->init = 0;
263 a->flags = 0;
264 }
265 return (1);
266 }
267
268 static void dgram_adjust_rcv_timeout(BIO *b)
269 {
270 # if defined(SO_RCVTIMEO)
271 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
272 union {
273 size_t s;
274 int i;
275 } sz = {
276 0
277 };
278
279 /* Is a timer active? */
280 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
281 struct timeval timenow, timeleft;
282
283 /* Read current socket timeout */
284 # ifdef OPENSSL_SYS_WINDOWS
285 int timeout;
286
287 sz.i = sizeof(timeout);
288 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
289 (void *)&timeout, &sz.i) < 0) {
290 perror("getsockopt");
291 } else {
292 data->socket_timeout.tv_sec = timeout / 1000;
293 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
294 }
295 # else
296 sz.i = sizeof(data->socket_timeout);
297 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
298 &(data->socket_timeout), (void *)&sz) < 0) {
299 perror("getsockopt");
300 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0)
301 OPENSSL_assert(sz.s <= sizeof(data->socket_timeout));
302 # endif
303
304 /* Get current time */
305 get_current_time(&timenow);
306
307 /* Calculate time left until timer expires */
308 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
309 timeleft.tv_sec -= timenow.tv_sec;
310 timeleft.tv_usec -= timenow.tv_usec;
311 if (timeleft.tv_usec < 0) {
312 timeleft.tv_sec--;
313 timeleft.tv_usec += 1000000;
314 }
315
316 if (timeleft.tv_sec < 0) {
317 timeleft.tv_sec = 0;
318 timeleft.tv_usec = 1;
319 }
320
321 /*
322 * Adjust socket timeout if next handhake message timer will expire
323 * earlier.
324 */
325 if ((data->socket_timeout.tv_sec == 0
326 && data->socket_timeout.tv_usec == 0)
327 || (data->socket_timeout.tv_sec > timeleft.tv_sec)
328 || (data->socket_timeout.tv_sec == timeleft.tv_sec
329 && data->socket_timeout.tv_usec >= timeleft.tv_usec)) {
330 # ifdef OPENSSL_SYS_WINDOWS
331 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
332 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
333 (void *)&timeout, sizeof(timeout)) < 0) {
334 perror("setsockopt");
335 }
336 # else
337 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
338 sizeof(struct timeval)) < 0) {
339 perror("setsockopt");
340 }
341 # endif
342 }
343 }
344 # endif
345 }
346
347 static void dgram_reset_rcv_timeout(BIO *b)
348 {
349 # if defined(SO_RCVTIMEO)
350 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
351
352 /* Is a timer active? */
353 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
354 # ifdef OPENSSL_SYS_WINDOWS
355 int timeout = data->socket_timeout.tv_sec * 1000 +
356 data->socket_timeout.tv_usec / 1000;
357 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
358 (void *)&timeout, sizeof(timeout)) < 0) {
359 perror("setsockopt");
360 }
361 # else
362 if (setsockopt
363 (b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
364 sizeof(struct timeval)) < 0) {
365 perror("setsockopt");
366 }
367 # endif
368 }
369 # endif
370 }
371
372 static int dgram_read(BIO *b, char *out, int outl)
373 {
374 int ret = 0;
375 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
376
377 struct {
378 /*
379 * See commentary in b_sock.c. <appro>
380 */
381 union {
382 size_t s;
383 int i;
384 } len;
385 union {
386 struct sockaddr sa;
387 struct sockaddr_in sa_in;
388 # if OPENSSL_USE_IPV6
389 struct sockaddr_in6 sa_in6;
390 # endif
391 } peer;
392 } sa;
393
394 sa.len.s = 0;
395 sa.len.i = sizeof(sa.peer);
396
397 if (out != NULL) {
398 clear_socket_error();
399 memset(&sa.peer, 0x00, sizeof(sa.peer));
400 dgram_adjust_rcv_timeout(b);
401 ret = recvfrom(b->num, out, outl, 0, &sa.peer.sa, (void *)&sa.len);
402 if (sizeof(sa.len.i) != sizeof(sa.len.s) && sa.len.i == 0) {
403 OPENSSL_assert(sa.len.s <= sizeof(sa.peer));
404 sa.len.i = (int)sa.len.s;
405 }
406
407 if (!data->connected && ret >= 0)
408 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
409
410 BIO_clear_retry_flags(b);
411 if (ret < 0) {
412 if (BIO_dgram_should_retry(ret)) {
413 BIO_set_retry_read(b);
414 data->_errno = get_last_socket_error();
415 }
416 }
417
418 dgram_reset_rcv_timeout(b);
419 }
420 return (ret);
421 }
422
423 static int dgram_write(BIO *b, const char *in, int inl)
424 {
425 int ret;
426 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
427 clear_socket_error();
428
429 if (data->connected)
430 ret = writesocket(b->num, in, inl);
431 else {
432 int peerlen = sizeof(data->peer);
433
434 if (data->peer.sa.sa_family == AF_INET)
435 peerlen = sizeof(data->peer.sa_in);
436 # if OPENSSL_USE_IPV6
437 else if (data->peer.sa.sa_family == AF_INET6)
438 peerlen = sizeof(data->peer.sa_in6);
439 # endif
440 # if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
441 ret = sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
442 # else
443 ret = sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
444 # endif
445 }
446
447 BIO_clear_retry_flags(b);
448 if (ret <= 0) {
449 if (BIO_dgram_should_retry(ret)) {
450 BIO_set_retry_write(b);
451 data->_errno = get_last_socket_error();
452 }
453 }
454 return (ret);
455 }
456
457 static long dgram_get_mtu_overhead(bio_dgram_data *data)
458 {
459 long ret;
460
461 switch (data->peer.sa.sa_family) {
462 case AF_INET:
463 /*
464 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
465 */
466 ret = 28;
467 break;
468 # if OPENSSL_USE_IPV6
469 case AF_INET6:
470 # ifdef IN6_IS_ADDR_V4MAPPED
471 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
472 /*
473 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
474 */
475 ret = 28;
476 else
477 # endif
478 /*
479 * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
480 */
481 ret = 48;
482 break;
483 # endif
484 default:
485 /* We don't know. Go with the historical default */
486 ret = 28;
487 break;
488 }
489 return ret;
490 }
491
492 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
493 {
494 long ret = 1;
495 int *ip;
496 struct sockaddr *to = NULL;
497 bio_dgram_data *data = NULL;
498 int sockopt_val = 0;
499 # if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
500 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
501 * modern enough to define socklen_t */
502 socklen_t addr_len;
503 union {
504 struct sockaddr sa;
505 struct sockaddr_in s4;
506 # if OPENSSL_USE_IPV6
507 struct sockaddr_in6 s6;
508 # endif
509 } addr;
510 # endif
511
512 data = (bio_dgram_data *)b->ptr;
513
514 switch (cmd) {
515 case BIO_CTRL_RESET:
516 num = 0;
517 case BIO_C_FILE_SEEK:
518 ret = 0;
519 break;
520 case BIO_C_FILE_TELL:
521 case BIO_CTRL_INFO:
522 ret = 0;
523 break;
524 case BIO_C_SET_FD:
525 dgram_clear(b);
526 b->num = *((int *)ptr);
527 b->shutdown = (int)num;
528 b->init = 1;
529 break;
530 case BIO_C_GET_FD:
531 if (b->init) {
532 ip = (int *)ptr;
533 if (ip != NULL)
534 *ip = b->num;
535 ret = b->num;
536 } else
537 ret = -1;
538 break;
539 case BIO_CTRL_GET_CLOSE:
540 ret = b->shutdown;
541 break;
542 case BIO_CTRL_SET_CLOSE:
543 b->shutdown = (int)num;
544 break;
545 case BIO_CTRL_PENDING:
546 case BIO_CTRL_WPENDING:
547 ret = 0;
548 break;
549 case BIO_CTRL_DUP:
550 case BIO_CTRL_FLUSH:
551 ret = 1;
552 break;
553 case BIO_CTRL_DGRAM_CONNECT:
554 to = (struct sockaddr *)ptr;
555 switch (to->sa_family) {
556 case AF_INET:
557 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
558 break;
559 # if OPENSSL_USE_IPV6
560 case AF_INET6:
561 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
562 break;
563 # endif
564 default:
565 memcpy(&data->peer, to, sizeof(data->peer.sa));
566 break;
567 }
568 break;
569 /* (Linux)kernel sets DF bit on outgoing IP packets */
570 case BIO_CTRL_DGRAM_MTU_DISCOVER:
571 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
572 addr_len = (socklen_t) sizeof(addr);
573 memset((void *)&addr, 0, sizeof(addr));
574 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
575 ret = 0;
576 break;
577 }
578 switch (addr.sa.sa_family) {
579 case AF_INET:
580 sockopt_val = IP_PMTUDISC_DO;
581 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
582 &sockopt_val, sizeof(sockopt_val))) < 0)
583 perror("setsockopt");
584 break;
585 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
586 case AF_INET6:
587 sockopt_val = IPV6_PMTUDISC_DO;
588 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
589 &sockopt_val, sizeof(sockopt_val))) < 0)
590 perror("setsockopt");
591 break;
592 # endif
593 default:
594 ret = -1;
595 break;
596 }
597 # else
598 ret = -1;
599 # endif
600 break;
601 case BIO_CTRL_DGRAM_QUERY_MTU:
602 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
603 addr_len = (socklen_t) sizeof(addr);
604 memset((void *)&addr, 0, sizeof(addr));
605 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
606 ret = 0;
607 break;
608 }
609 sockopt_len = sizeof(sockopt_val);
610 switch (addr.sa.sa_family) {
611 case AF_INET:
612 if ((ret =
613 getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
614 &sockopt_len)) < 0 || sockopt_val < 0) {
615 ret = 0;
616 } else {
617 /*
618 * we assume that the transport protocol is UDP and no IP
619 * options are used.
620 */
621 data->mtu = sockopt_val - 8 - 20;
622 ret = data->mtu;
623 }
624 break;
625 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
626 case AF_INET6:
627 if ((ret =
628 getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
629 (void *)&sockopt_val, &sockopt_len)) < 0
630 || sockopt_val < 0) {
631 ret = 0;
632 } else {
633 /*
634 * we assume that the transport protocol is UDP and no IPV6
635 * options are used.
636 */
637 data->mtu = sockopt_val - 8 - 40;
638 ret = data->mtu;
639 }
640 break;
641 # endif
642 default:
643 ret = 0;
644 break;
645 }
646 # else
647 ret = 0;
648 # endif
649 break;
650 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
651 ret = -dgram_get_mtu_overhead(data);
652 switch (data->peer.sa.sa_family) {
653 case AF_INET:
654 ret += 576;
655 break;
656 # if OPENSSL_USE_IPV6
657 case AF_INET6:
658 # ifdef IN6_IS_ADDR_V4MAPPED
659 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
660 ret += 576;
661 else
662 # endif
663 ret += 1280;
664 break;
665 # endif
666 default:
667 ret += 576;
668 break;
669 }
670 break;
671 case BIO_CTRL_DGRAM_GET_MTU:
672 return data->mtu;
673 case BIO_CTRL_DGRAM_SET_MTU:
674 data->mtu = num;
675 ret = num;
676 break;
677 case BIO_CTRL_DGRAM_SET_CONNECTED:
678 to = (struct sockaddr *)ptr;
679
680 if (to != NULL) {
681 data->connected = 1;
682 switch (to->sa_family) {
683 case AF_INET:
684 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
685 break;
686 # if OPENSSL_USE_IPV6
687 case AF_INET6:
688 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
689 break;
690 # endif
691 default:
692 memcpy(&data->peer, to, sizeof(data->peer.sa));
693 break;
694 }
695 } else {
696 data->connected = 0;
697 memset(&(data->peer), 0x00, sizeof(data->peer));
698 }
699 break;
700 case BIO_CTRL_DGRAM_GET_PEER:
701 switch (data->peer.sa.sa_family) {
702 case AF_INET:
703 ret = sizeof(data->peer.sa_in);
704 break;
705 # if OPENSSL_USE_IPV6
706 case AF_INET6:
707 ret = sizeof(data->peer.sa_in6);
708 break;
709 # endif
710 default:
711 ret = sizeof(data->peer.sa);
712 break;
713 }
714 if (num == 0 || num > ret)
715 num = ret;
716 memcpy(ptr, &data->peer, (ret = num));
717 break;
718 case BIO_CTRL_DGRAM_SET_PEER:
719 to = (struct sockaddr *)ptr;
720 switch (to->sa_family) {
721 case AF_INET:
722 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
723 break;
724 # if OPENSSL_USE_IPV6
725 case AF_INET6:
726 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
727 break;
728 # endif
729 default:
730 memcpy(&data->peer, to, sizeof(data->peer.sa));
731 break;
732 }
733 break;
734 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
735 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
736 break;
737 # if defined(SO_RCVTIMEO)
738 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
739 # ifdef OPENSSL_SYS_WINDOWS
740 {
741 struct timeval *tv = (struct timeval *)ptr;
742 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
743 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
744 (void *)&timeout, sizeof(timeout)) < 0) {
745 perror("setsockopt");
746 ret = -1;
747 }
748 }
749 # else
750 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
751 sizeof(struct timeval)) < 0) {
752 perror("setsockopt");
753 ret = -1;
754 }
755 # endif
756 break;
757 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
758 {
759 union {
760 size_t s;
761 int i;
762 } sz = {
763 0
764 };
765 # ifdef OPENSSL_SYS_WINDOWS
766 int timeout;
767 struct timeval *tv = (struct timeval *)ptr;
768
769 sz.i = sizeof(timeout);
770 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
771 (void *)&timeout, &sz.i) < 0) {
772 perror("getsockopt");
773 ret = -1;
774 } else {
775 tv->tv_sec = timeout / 1000;
776 tv->tv_usec = (timeout % 1000) * 1000;
777 ret = sizeof(*tv);
778 }
779 # else
780 sz.i = sizeof(struct timeval);
781 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
782 ptr, (void *)&sz) < 0) {
783 perror("getsockopt");
784 ret = -1;
785 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
786 OPENSSL_assert(sz.s <= sizeof(struct timeval));
787 ret = (int)sz.s;
788 } else
789 ret = sz.i;
790 # endif
791 }
792 break;
793 # endif
794 # if defined(SO_SNDTIMEO)
795 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
796 # ifdef OPENSSL_SYS_WINDOWS
797 {
798 struct timeval *tv = (struct timeval *)ptr;
799 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
800 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
801 (void *)&timeout, sizeof(timeout)) < 0) {
802 perror("setsockopt");
803 ret = -1;
804 }
805 }
806 # else
807 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
808 sizeof(struct timeval)) < 0) {
809 perror("setsockopt");
810 ret = -1;
811 }
812 # endif
813 break;
814 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
815 {
816 union {
817 size_t s;
818 int i;
819 } sz = {
820 0
821 };
822 # ifdef OPENSSL_SYS_WINDOWS
823 int timeout;
824 struct timeval *tv = (struct timeval *)ptr;
825
826 sz.i = sizeof(timeout);
827 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
828 (void *)&timeout, &sz.i) < 0) {
829 perror("getsockopt");
830 ret = -1;
831 } else {
832 tv->tv_sec = timeout / 1000;
833 tv->tv_usec = (timeout % 1000) * 1000;
834 ret = sizeof(*tv);
835 }
836 # else
837 sz.i = sizeof(struct timeval);
838 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
839 ptr, (void *)&sz) < 0) {
840 perror("getsockopt");
841 ret = -1;
842 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
843 OPENSSL_assert(sz.s <= sizeof(struct timeval));
844 ret = (int)sz.s;
845 } else
846 ret = sz.i;
847 # endif
848 }
849 break;
850 # endif
851 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
852 /* fall-through */
853 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
854 # ifdef OPENSSL_SYS_WINDOWS
855 if (data->_errno == WSAETIMEDOUT)
856 # else
857 if (data->_errno == EAGAIN)
858 # endif
859 {
860 ret = 1;
861 data->_errno = 0;
862 } else
863 ret = 0;
864 break;
865 # ifdef EMSGSIZE
866 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
867 if (data->_errno == EMSGSIZE) {
868 ret = 1;
869 data->_errno = 0;
870 } else
871 ret = 0;
872 break;
873 # endif
874 case BIO_CTRL_DGRAM_SET_DONT_FRAG:
875 sockopt_val = num ? 1 : 0;
876
877 switch (data->peer.sa.sa_family) {
878 case AF_INET:
879 # if defined(IP_DONTFRAG)
880 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG,
881 &sockopt_val, sizeof(sockopt_val))) < 0) {
882 perror("setsockopt");
883 ret = -1;
884 }
885 # elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTUDISCOVER)
886 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
887 (ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
888 &sockopt_val, sizeof(sockopt_val))) < 0) {
889 perror("setsockopt");
890 ret = -1;
891 }
892 # elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT)
893 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT,
894 (const char *)&sockopt_val,
895 sizeof(sockopt_val))) < 0) {
896 perror("setsockopt");
897 ret = -1;
898 }
899 # else
900 ret = -1;
901 # endif
902 break;
903 # if OPENSSL_USE_IPV6
904 case AF_INET6:
905 # if defined(IPV6_DONTFRAG)
906 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
907 (const void *)&sockopt_val,
908 sizeof(sockopt_val))) < 0) {
909 perror("setsockopt");
910 ret = -1;
911 }
912 # elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER)
913 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
914 (ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
915 &sockopt_val, sizeof(sockopt_val))) < 0) {
916 perror("setsockopt");
917 ret = -1;
918 }
919 # else
920 ret = -1;
921 # endif
922 break;
923 # endif
924 default:
925 ret = -1;
926 break;
927 }
928 break;
929 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
930 ret = dgram_get_mtu_overhead(data);
931 break;
932 default:
933 ret = 0;
934 break;
935 }
936 return (ret);
937 }
938
939 static int dgram_puts(BIO *bp, const char *str)
940 {
941 int n, ret;
942
943 n = strlen(str);
944 ret = dgram_write(bp, str, n);
945 return (ret);
946 }
947
948 # ifndef OPENSSL_NO_SCTP
949 BIO_METHOD *BIO_s_datagram_sctp(void)
950 {
951 return (&methods_dgramp_sctp);
952 }
953
954 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
955 {
956 BIO *bio;
957 int ret, optval = 20000;
958 int auth_data = 0, auth_forward = 0;
959 unsigned char *p;
960 struct sctp_authchunk auth;
961 struct sctp_authchunks *authchunks;
962 socklen_t sockopt_len;
963 # ifdef SCTP_AUTHENTICATION_EVENT
964 # ifdef SCTP_EVENT
965 struct sctp_event event;
966 # else
967 struct sctp_event_subscribe event;
968 # endif
969 # endif
970
971 bio = BIO_new(BIO_s_datagram_sctp());
972 if (bio == NULL)
973 return (NULL);
974 BIO_set_fd(bio, fd, close_flag);
975
976 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
977 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
978 ret =
979 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
980 sizeof(struct sctp_authchunk));
981 if (ret < 0) {
982 BIO_vfree(bio);
983 return (NULL);
984 }
985 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
986 ret =
987 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
988 sizeof(struct sctp_authchunk));
989 if (ret < 0) {
990 BIO_vfree(bio);
991 return (NULL);
992 }
993
994 /*
995 * Test if activation was successful. When using accept(), SCTP-AUTH has
996 * to be activated for the listening socket already, otherwise the
997 * connected socket won't use it.
998 */
999 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1000 authchunks = OPENSSL_malloc(sockopt_len);
1001 if (!authchunks) {
1002 BIO_vfree(bio);
1003 return (NULL);
1004 }
1005 memset(authchunks, 0, sockopt_len);
1006 ret =
1007 getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
1008 &sockopt_len);
1009
1010 if (ret < 0) {
1011 OPENSSL_free(authchunks);
1012 BIO_vfree(bio);
1013 return (NULL);
1014 }
1015
1016 for (p = (unsigned char *)authchunks->gauth_chunks;
1017 p < (unsigned char *)authchunks + sockopt_len;
1018 p += sizeof(uint8_t)) {
1019 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1020 auth_data = 1;
1021 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1022 auth_forward = 1;
1023 }
1024
1025 OPENSSL_free(authchunks);
1026
1027 OPENSSL_assert(auth_data);
1028 OPENSSL_assert(auth_forward);
1029
1030 # ifdef SCTP_AUTHENTICATION_EVENT
1031 # ifdef SCTP_EVENT
1032 memset(&event, 0, sizeof(struct sctp_event));
1033 event.se_assoc_id = 0;
1034 event.se_type = SCTP_AUTHENTICATION_EVENT;
1035 event.se_on = 1;
1036 ret =
1037 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
1038 sizeof(struct sctp_event));
1039 if (ret < 0) {
1040 BIO_vfree(bio);
1041 return (NULL);
1042 }
1043 # else
1044 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
1045 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
1046 if (ret < 0) {
1047 BIO_vfree(bio);
1048 return (NULL);
1049 }
1050
1051 event.sctp_authentication_event = 1;
1052
1053 ret =
1054 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
1055 sizeof(struct sctp_event_subscribe));
1056 if (ret < 0) {
1057 BIO_vfree(bio);
1058 return (NULL);
1059 }
1060 # endif
1061 # endif
1062
1063 /*
1064 * Disable partial delivery by setting the min size larger than the max
1065 * record size of 2^14 + 2048 + 13
1066 */
1067 ret =
1068 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
1069 sizeof(optval));
1070 if (ret < 0) {
1071 BIO_vfree(bio);
1072 return (NULL);
1073 }
1074
1075 return (bio);
1076 }
1077
1078 int BIO_dgram_is_sctp(BIO *bio)
1079 {
1080 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
1081 }
1082
1083 static int dgram_sctp_new(BIO *bi)
1084 {
1085 bio_dgram_sctp_data *data = NULL;
1086
1087 bi->init = 0;
1088 bi->num = 0;
1089 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
1090 if (data == NULL)
1091 return 0;
1092 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
1093 # ifdef SCTP_PR_SCTP_NONE
1094 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1095 # endif
1096 bi->ptr = data;
1097
1098 bi->flags = 0;
1099 return (1);
1100 }
1101
1102 static int dgram_sctp_free(BIO *a)
1103 {
1104 bio_dgram_sctp_data *data;
1105
1106 if (a == NULL)
1107 return (0);
1108 if (!dgram_clear(a))
1109 return 0;
1110
1111 data = (bio_dgram_sctp_data *) a->ptr;
1112 if (data != NULL) {
1113 if (data->saved_message.data != NULL)
1114 OPENSSL_free(data->saved_message.data);
1115 OPENSSL_free(data);
1116 }
1117
1118 return (1);
1119 }
1120
1121 # ifdef SCTP_AUTHENTICATION_EVENT
1122 void dgram_sctp_handle_auth_free_key_event(BIO *b,
1123 union sctp_notification *snp)
1124 {
1125 int ret;
1126 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
1127
1128 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
1129 struct sctp_authkeyid authkeyid;
1130
1131 /* delete key */
1132 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1133 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1134 &authkeyid, sizeof(struct sctp_authkeyid));
1135 }
1136 }
1137 # endif
1138
1139 static int dgram_sctp_read(BIO *b, char *out, int outl)
1140 {
1141 int ret = 0, n = 0, i, optval;
1142 socklen_t optlen;
1143 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1144 union sctp_notification *snp;
1145 struct msghdr msg;
1146 struct iovec iov;
1147 struct cmsghdr *cmsg;
1148 char cmsgbuf[512];
1149
1150 if (out != NULL) {
1151 clear_socket_error();
1152
1153 do {
1154 memset(&data->rcvinfo, 0x00,
1155 sizeof(struct bio_dgram_sctp_rcvinfo));
1156 iov.iov_base = out;
1157 iov.iov_len = outl;
1158 msg.msg_name = NULL;
1159 msg.msg_namelen = 0;
1160 msg.msg_iov = &iov;
1161 msg.msg_iovlen = 1;
1162 msg.msg_control = cmsgbuf;
1163 msg.msg_controllen = 512;
1164 msg.msg_flags = 0;
1165 n = recvmsg(b->num, &msg, 0);
1166
1167 if (n <= 0) {
1168 if (n < 0)
1169 ret = n;
1170 break;
1171 }
1172
1173 if (msg.msg_controllen > 0) {
1174 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1175 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1176 if (cmsg->cmsg_level != IPPROTO_SCTP)
1177 continue;
1178 # ifdef SCTP_RCVINFO
1179 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1180 struct sctp_rcvinfo *rcvinfo;
1181
1182 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1183 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1184 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1185 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1186 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1187 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1188 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1189 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1190 }
1191 # endif
1192 # ifdef SCTP_SNDRCV
1193 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1194 struct sctp_sndrcvinfo *sndrcvinfo;
1195
1196 sndrcvinfo =
1197 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1198 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1199 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1200 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1201 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1202 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1203 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1204 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1205 }
1206 # endif
1207 }
1208 }
1209
1210 if (msg.msg_flags & MSG_NOTIFICATION) {
1211 snp = (union sctp_notification *)out;
1212 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1213 # ifdef SCTP_EVENT
1214 struct sctp_event event;
1215 # else
1216 struct sctp_event_subscribe event;
1217 socklen_t eventsize;
1218 # endif
1219 /*
1220 * If a message has been delayed until the socket is dry,
1221 * it can be sent now.
1222 */
1223 if (data->saved_message.length > 0) {
1224 dgram_sctp_write(data->saved_message.bio,
1225 data->saved_message.data,
1226 data->saved_message.length);
1227 OPENSSL_free(data->saved_message.data);
1228 data->saved_message.data = NULL;
1229 data->saved_message.length = 0;
1230 }
1231
1232 /* disable sender dry event */
1233 # ifdef SCTP_EVENT
1234 memset(&event, 0, sizeof(struct sctp_event));
1235 event.se_assoc_id = 0;
1236 event.se_type = SCTP_SENDER_DRY_EVENT;
1237 event.se_on = 0;
1238 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1239 sizeof(struct sctp_event));
1240 if (i < 0) {
1241 ret = i;
1242 break;
1243 }
1244 # else
1245 eventsize = sizeof(struct sctp_event_subscribe);
1246 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1247 &eventsize);
1248 if (i < 0) {
1249 ret = i;
1250 break;
1251 }
1252
1253 event.sctp_sender_dry_event = 0;
1254
1255 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1256 sizeof(struct sctp_event_subscribe));
1257 if (i < 0) {
1258 ret = i;
1259 break;
1260 }
1261 # endif
1262 }
1263 # ifdef SCTP_AUTHENTICATION_EVENT
1264 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1265 dgram_sctp_handle_auth_free_key_event(b, snp);
1266 # endif
1267
1268 if (data->handle_notifications != NULL)
1269 data->handle_notifications(b, data->notification_context,
1270 (void *)out);
1271
1272 memset(out, 0, outl);
1273 } else
1274 ret += n;
1275 }
1276 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1277 && (ret < outl));
1278
1279 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1280 /* Partial message read, this should never happen! */
1281
1282 /*
1283 * The buffer was too small, this means the peer sent a message
1284 * that was larger than allowed.
1285 */
1286 if (ret == outl)
1287 return -1;
1288
1289 /*
1290 * Test if socket buffer can handle max record size (2^14 + 2048
1291 * + 13)
1292 */
1293 optlen = (socklen_t) sizeof(int);
1294 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1295 if (ret >= 0)
1296 OPENSSL_assert(optval >= 18445);
1297
1298 /*
1299 * Test if SCTP doesn't partially deliver below max record size
1300 * (2^14 + 2048 + 13)
1301 */
1302 optlen = (socklen_t) sizeof(int);
1303 ret =
1304 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1305 &optval, &optlen);
1306 if (ret >= 0)
1307 OPENSSL_assert(optval >= 18445);
1308
1309 /*
1310 * Partially delivered notification??? Probably a bug....
1311 */
1312 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1313
1314 /*
1315 * Everything seems ok till now, so it's most likely a message
1316 * dropped by PR-SCTP.
1317 */
1318 memset(out, 0, outl);
1319 BIO_set_retry_read(b);
1320 return -1;
1321 }
1322
1323 BIO_clear_retry_flags(b);
1324 if (ret < 0) {
1325 if (BIO_dgram_should_retry(ret)) {
1326 BIO_set_retry_read(b);
1327 data->_errno = get_last_socket_error();
1328 }
1329 }
1330
1331 /* Test if peer uses SCTP-AUTH before continuing */
1332 if (!data->peer_auth_tested) {
1333 int ii, auth_data = 0, auth_forward = 0;
1334 unsigned char *p;
1335 struct sctp_authchunks *authchunks;
1336
1337 optlen =
1338 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1339 authchunks = OPENSSL_malloc(optlen);
1340 if (!authchunks) {
1341 BIOerr(BIO_F_DGRAM_SCTP_READ, ERR_R_MALLOC_FAILURE);
1342 return -1;
1343 }
1344 memset(authchunks, 0, optlen);
1345 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1346 authchunks, &optlen);
1347
1348 if (ii >= 0)
1349 for (p = (unsigned char *)authchunks->gauth_chunks;
1350 p < (unsigned char *)authchunks + optlen;
1351 p += sizeof(uint8_t)) {
1352 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1353 auth_data = 1;
1354 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1355 auth_forward = 1;
1356 }
1357
1358 OPENSSL_free(authchunks);
1359
1360 if (!auth_data || !auth_forward) {
1361 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1362 return -1;
1363 }
1364
1365 data->peer_auth_tested = 1;
1366 }
1367 }
1368 return (ret);
1369 }
1370
1371 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1372 {
1373 int ret;
1374 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1375 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1376 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1377 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1378 struct iovec iov[1];
1379 struct msghdr msg;
1380 struct cmsghdr *cmsg;
1381 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1382 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1383 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1384 struct sctp_sndinfo *sndinfo;
1385 struct sctp_prinfo *prinfo;
1386 # else
1387 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1388 struct sctp_sndrcvinfo *sndrcvinfo;
1389 # endif
1390
1391 clear_socket_error();
1392
1393 /*
1394 * If we're send anything else than application data, disable all user
1395 * parameters and flags.
1396 */
1397 if (in[0] != 23) {
1398 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1399 # ifdef SCTP_SACK_IMMEDIATELY
1400 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1401 # endif
1402 sinfo = &handshake_sinfo;
1403 }
1404
1405 /*
1406 * If we have to send a shutdown alert message and the socket is not dry
1407 * yet, we have to save it and send it as soon as the socket gets dry.
1408 */
1409 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b)) {
1410 char *tmp;
1411 data->saved_message.bio = b;
1412 if (!(tmp = OPENSSL_malloc(inl))) {
1413 BIOerr(BIO_F_DGRAM_SCTP_WRITE, ERR_R_MALLOC_FAILURE);
1414 return -1;
1415 }
1416 if (data->saved_message.data)
1417 OPENSSL_free(data->saved_message.data);
1418 data->saved_message.data = tmp;
1419 memcpy(data->saved_message.data, in, inl);
1420 data->saved_message.length = inl;
1421 return inl;
1422 }
1423
1424 iov[0].iov_base = (char *)in;
1425 iov[0].iov_len = inl;
1426 msg.msg_name = NULL;
1427 msg.msg_namelen = 0;
1428 msg.msg_iov = iov;
1429 msg.msg_iovlen = 1;
1430 msg.msg_control = (caddr_t) cmsgbuf;
1431 msg.msg_controllen = 0;
1432 msg.msg_flags = 0;
1433 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1434 cmsg = (struct cmsghdr *)cmsgbuf;
1435 cmsg->cmsg_level = IPPROTO_SCTP;
1436 cmsg->cmsg_type = SCTP_SNDINFO;
1437 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1438 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1439 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1440 sndinfo->snd_sid = sinfo->snd_sid;
1441 sndinfo->snd_flags = sinfo->snd_flags;
1442 sndinfo->snd_ppid = sinfo->snd_ppid;
1443 sndinfo->snd_context = sinfo->snd_context;
1444 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1445
1446 cmsg =
1447 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1448 cmsg->cmsg_level = IPPROTO_SCTP;
1449 cmsg->cmsg_type = SCTP_PRINFO;
1450 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1451 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1452 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1453 prinfo->pr_policy = pinfo->pr_policy;
1454 prinfo->pr_value = pinfo->pr_value;
1455 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1456 # else
1457 cmsg = (struct cmsghdr *)cmsgbuf;
1458 cmsg->cmsg_level = IPPROTO_SCTP;
1459 cmsg->cmsg_type = SCTP_SNDRCV;
1460 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1461 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1462 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1463 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1464 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1465 # ifdef __FreeBSD__
1466 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1467 # endif
1468 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1469 sndrcvinfo->sinfo_context = sinfo->snd_context;
1470 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1471 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1472 # endif
1473
1474 ret = sendmsg(b->num, &msg, 0);
1475
1476 BIO_clear_retry_flags(b);
1477 if (ret <= 0) {
1478 if (BIO_dgram_should_retry(ret)) {
1479 BIO_set_retry_write(b);
1480 data->_errno = get_last_socket_error();
1481 }
1482 }
1483 return (ret);
1484 }
1485
1486 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1487 {
1488 long ret = 1;
1489 bio_dgram_sctp_data *data = NULL;
1490 socklen_t sockopt_len = 0;
1491 struct sctp_authkeyid authkeyid;
1492 struct sctp_authkey *authkey = NULL;
1493
1494 data = (bio_dgram_sctp_data *) b->ptr;
1495
1496 switch (cmd) {
1497 case BIO_CTRL_DGRAM_QUERY_MTU:
1498 /*
1499 * Set to maximum (2^14) and ignore user input to enable transport
1500 * protocol fragmentation. Returns always 2^14.
1501 */
1502 data->mtu = 16384;
1503 ret = data->mtu;
1504 break;
1505 case BIO_CTRL_DGRAM_SET_MTU:
1506 /*
1507 * Set to maximum (2^14) and ignore input to enable transport
1508 * protocol fragmentation. Returns always 2^14.
1509 */
1510 data->mtu = 16384;
1511 ret = data->mtu;
1512 break;
1513 case BIO_CTRL_DGRAM_SET_CONNECTED:
1514 case BIO_CTRL_DGRAM_CONNECT:
1515 /* Returns always -1. */
1516 ret = -1;
1517 break;
1518 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1519 /*
1520 * SCTP doesn't need the DTLS timer Returns always 1.
1521 */
1522 break;
1523 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1524 /*
1525 * We allow transport protocol fragmentation so this is irrelevant
1526 */
1527 ret = 0;
1528 break;
1529 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1530 if (num > 0)
1531 data->in_handshake = 1;
1532 else
1533 data->in_handshake = 0;
1534
1535 ret =
1536 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1537 &data->in_handshake, sizeof(int));
1538 break;
1539 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1540 /*
1541 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1542 */
1543
1544 /* Get active key */
1545 sockopt_len = sizeof(struct sctp_authkeyid);
1546 ret =
1547 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1548 &sockopt_len);
1549 if (ret < 0)
1550 break;
1551
1552 /* Add new key */
1553 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1554 authkey = OPENSSL_malloc(sockopt_len);
1555 if (authkey == NULL) {
1556 ret = -1;
1557 break;
1558 }
1559 memset(authkey, 0x00, sockopt_len);
1560 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1561 # ifndef __FreeBSD__
1562 /*
1563 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1564 * and higher work without it.
1565 */
1566 authkey->sca_keylength = 64;
1567 # endif
1568 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1569
1570 ret =
1571 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1572 sockopt_len);
1573 OPENSSL_free(authkey);
1574 authkey = NULL;
1575 if (ret < 0)
1576 break;
1577
1578 /* Reset active key */
1579 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1580 &authkeyid, sizeof(struct sctp_authkeyid));
1581 if (ret < 0)
1582 break;
1583
1584 break;
1585 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1586 /* Returns 0 on success, -1 otherwise. */
1587
1588 /* Get active key */
1589 sockopt_len = sizeof(struct sctp_authkeyid);
1590 ret =
1591 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1592 &sockopt_len);
1593 if (ret < 0)
1594 break;
1595
1596 /* Set active key */
1597 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1598 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1599 &authkeyid, sizeof(struct sctp_authkeyid));
1600 if (ret < 0)
1601 break;
1602
1603 /*
1604 * CCS has been sent, so remember that and fall through to check if
1605 * we need to deactivate an old key
1606 */
1607 data->ccs_sent = 1;
1608
1609 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1610 /* Returns 0 on success, -1 otherwise. */
1611
1612 /*
1613 * Has this command really been called or is this just a
1614 * fall-through?
1615 */
1616 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1617 data->ccs_rcvd = 1;
1618
1619 /*
1620 * CSS has been both, received and sent, so deactivate an old key
1621 */
1622 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1623 /* Get active key */
1624 sockopt_len = sizeof(struct sctp_authkeyid);
1625 ret =
1626 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1627 &authkeyid, &sockopt_len);
1628 if (ret < 0)
1629 break;
1630
1631 /*
1632 * Deactivate key or delete second last key if
1633 * SCTP_AUTHENTICATION_EVENT is not available.
1634 */
1635 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1636 # ifdef SCTP_AUTH_DEACTIVATE_KEY
1637 sockopt_len = sizeof(struct sctp_authkeyid);
1638 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1639 &authkeyid, sockopt_len);
1640 if (ret < 0)
1641 break;
1642 # endif
1643 # ifndef SCTP_AUTHENTICATION_EVENT
1644 if (authkeyid.scact_keynumber > 0) {
1645 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1646 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1647 &authkeyid, sizeof(struct sctp_authkeyid));
1648 if (ret < 0)
1649 break;
1650 }
1651 # endif
1652
1653 data->ccs_rcvd = 0;
1654 data->ccs_sent = 0;
1655 }
1656 break;
1657 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1658 /* Returns the size of the copied struct. */
1659 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1660 num = sizeof(struct bio_dgram_sctp_sndinfo);
1661
1662 memcpy(ptr, &(data->sndinfo), num);
1663 ret = num;
1664 break;
1665 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1666 /* Returns the size of the copied struct. */
1667 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1668 num = sizeof(struct bio_dgram_sctp_sndinfo);
1669
1670 memcpy(&(data->sndinfo), ptr, num);
1671 break;
1672 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1673 /* Returns the size of the copied struct. */
1674 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1675 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1676
1677 memcpy(ptr, &data->rcvinfo, num);
1678
1679 ret = num;
1680 break;
1681 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1682 /* Returns the size of the copied struct. */
1683 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1684 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1685
1686 memcpy(&(data->rcvinfo), ptr, num);
1687 break;
1688 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1689 /* Returns the size of the copied struct. */
1690 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1691 num = sizeof(struct bio_dgram_sctp_prinfo);
1692
1693 memcpy(ptr, &(data->prinfo), num);
1694 ret = num;
1695 break;
1696 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1697 /* Returns the size of the copied struct. */
1698 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1699 num = sizeof(struct bio_dgram_sctp_prinfo);
1700
1701 memcpy(&(data->prinfo), ptr, num);
1702 break;
1703 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1704 /* Returns always 1. */
1705 if (num > 0)
1706 data->save_shutdown = 1;
1707 else
1708 data->save_shutdown = 0;
1709 break;
1710
1711 default:
1712 /*
1713 * Pass to default ctrl function to process SCTP unspecific commands
1714 */
1715 ret = dgram_ctrl(b, cmd, num, ptr);
1716 break;
1717 }
1718 return (ret);
1719 }
1720
1721 int BIO_dgram_sctp_notification_cb(BIO *b,
1722 void (*handle_notifications) (BIO *bio,
1723 void
1724 *context,
1725 void *buf),
1726 void *context)
1727 {
1728 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1729
1730 if (handle_notifications != NULL) {
1731 data->handle_notifications = handle_notifications;
1732 data->notification_context = context;
1733 } else
1734 return -1;
1735
1736 return 0;
1737 }
1738
1739 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1740 {
1741 int is_dry = 0;
1742 int n, sockflags, ret;
1743 union sctp_notification snp;
1744 struct msghdr msg;
1745 struct iovec iov;
1746 # ifdef SCTP_EVENT
1747 struct sctp_event event;
1748 # else
1749 struct sctp_event_subscribe event;
1750 socklen_t eventsize;
1751 # endif
1752 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1753
1754 /* set sender dry event */
1755 # ifdef SCTP_EVENT
1756 memset(&event, 0, sizeof(struct sctp_event));
1757 event.se_assoc_id = 0;
1758 event.se_type = SCTP_SENDER_DRY_EVENT;
1759 event.se_on = 1;
1760 ret =
1761 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1762 sizeof(struct sctp_event));
1763 # else
1764 eventsize = sizeof(struct sctp_event_subscribe);
1765 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1766 if (ret < 0)
1767 return -1;
1768
1769 event.sctp_sender_dry_event = 1;
1770
1771 ret =
1772 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1773 sizeof(struct sctp_event_subscribe));
1774 # endif
1775 if (ret < 0)
1776 return -1;
1777
1778 /* peek for notification */
1779 memset(&snp, 0x00, sizeof(union sctp_notification));
1780 iov.iov_base = (char *)&snp;
1781 iov.iov_len = sizeof(union sctp_notification);
1782 msg.msg_name = NULL;
1783 msg.msg_namelen = 0;
1784 msg.msg_iov = &iov;
1785 msg.msg_iovlen = 1;
1786 msg.msg_control = NULL;
1787 msg.msg_controllen = 0;
1788 msg.msg_flags = 0;
1789
1790 n = recvmsg(b->num, &msg, MSG_PEEK);
1791 if (n <= 0) {
1792 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1793 && (get_last_socket_error() != EWOULDBLOCK))
1794 return -1;
1795 else
1796 return 0;
1797 }
1798
1799 /* if we find a notification, process it and try again if necessary */
1800 while (msg.msg_flags & MSG_NOTIFICATION) {
1801 memset(&snp, 0x00, sizeof(union sctp_notification));
1802 iov.iov_base = (char *)&snp;
1803 iov.iov_len = sizeof(union sctp_notification);
1804 msg.msg_name = NULL;
1805 msg.msg_namelen = 0;
1806 msg.msg_iov = &iov;
1807 msg.msg_iovlen = 1;
1808 msg.msg_control = NULL;
1809 msg.msg_controllen = 0;
1810 msg.msg_flags = 0;
1811
1812 n = recvmsg(b->num, &msg, 0);
1813 if (n <= 0) {
1814 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1815 && (get_last_socket_error() != EWOULDBLOCK))
1816 return -1;
1817 else
1818 return is_dry;
1819 }
1820
1821 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1822 is_dry = 1;
1823
1824 /* disable sender dry event */
1825 # ifdef SCTP_EVENT
1826 memset(&event, 0, sizeof(struct sctp_event));
1827 event.se_assoc_id = 0;
1828 event.se_type = SCTP_SENDER_DRY_EVENT;
1829 event.se_on = 0;
1830 ret =
1831 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1832 sizeof(struct sctp_event));
1833 # else
1834 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1835 ret =
1836 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1837 &eventsize);
1838 if (ret < 0)
1839 return -1;
1840
1841 event.sctp_sender_dry_event = 0;
1842
1843 ret =
1844 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1845 sizeof(struct sctp_event_subscribe));
1846 # endif
1847 if (ret < 0)
1848 return -1;
1849 }
1850 # ifdef SCTP_AUTHENTICATION_EVENT
1851 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1852 dgram_sctp_handle_auth_free_key_event(b, &snp);
1853 # endif
1854
1855 if (data->handle_notifications != NULL)
1856 data->handle_notifications(b, data->notification_context,
1857 (void *)&snp);
1858
1859 /* found notification, peek again */
1860 memset(&snp, 0x00, sizeof(union sctp_notification));
1861 iov.iov_base = (char *)&snp;
1862 iov.iov_len = sizeof(union sctp_notification);
1863 msg.msg_name = NULL;
1864 msg.msg_namelen = 0;
1865 msg.msg_iov = &iov;
1866 msg.msg_iovlen = 1;
1867 msg.msg_control = NULL;
1868 msg.msg_controllen = 0;
1869 msg.msg_flags = 0;
1870
1871 /* if we have seen the dry already, don't wait */
1872 if (is_dry) {
1873 sockflags = fcntl(b->num, F_GETFL, 0);
1874 fcntl(b->num, F_SETFL, O_NONBLOCK);
1875 }
1876
1877 n = recvmsg(b->num, &msg, MSG_PEEK);
1878
1879 if (is_dry) {
1880 fcntl(b->num, F_SETFL, sockflags);
1881 }
1882
1883 if (n <= 0) {
1884 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1885 && (get_last_socket_error() != EWOULDBLOCK))
1886 return -1;
1887 else
1888 return is_dry;
1889 }
1890 }
1891
1892 /* read anything else */
1893 return is_dry;
1894 }
1895
1896 int BIO_dgram_sctp_msg_waiting(BIO *b)
1897 {
1898 int n, sockflags;
1899 union sctp_notification snp;
1900 struct msghdr msg;
1901 struct iovec iov;
1902 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1903
1904 /* Check if there are any messages waiting to be read */
1905 do {
1906 memset(&snp, 0x00, sizeof(union sctp_notification));
1907 iov.iov_base = (char *)&snp;
1908 iov.iov_len = sizeof(union sctp_notification);
1909 msg.msg_name = NULL;
1910 msg.msg_namelen = 0;
1911 msg.msg_iov = &iov;
1912 msg.msg_iovlen = 1;
1913 msg.msg_control = NULL;
1914 msg.msg_controllen = 0;
1915 msg.msg_flags = 0;
1916
1917 sockflags = fcntl(b->num, F_GETFL, 0);
1918 fcntl(b->num, F_SETFL, O_NONBLOCK);
1919 n = recvmsg(b->num, &msg, MSG_PEEK);
1920 fcntl(b->num, F_SETFL, sockflags);
1921
1922 /* if notification, process and try again */
1923 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1924 # ifdef SCTP_AUTHENTICATION_EVENT
1925 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1926 dgram_sctp_handle_auth_free_key_event(b, &snp);
1927 # endif
1928
1929 memset(&snp, 0x00, sizeof(union sctp_notification));
1930 iov.iov_base = (char *)&snp;
1931 iov.iov_len = sizeof(union sctp_notification);
1932 msg.msg_name = NULL;
1933 msg.msg_namelen = 0;
1934 msg.msg_iov = &iov;
1935 msg.msg_iovlen = 1;
1936 msg.msg_control = NULL;
1937 msg.msg_controllen = 0;
1938 msg.msg_flags = 0;
1939 n = recvmsg(b->num, &msg, 0);
1940
1941 if (data->handle_notifications != NULL)
1942 data->handle_notifications(b, data->notification_context,
1943 (void *)&snp);
1944 }
1945
1946 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1947
1948 /* Return 1 if there is a message to be read, return 0 otherwise. */
1949 if (n > 0)
1950 return 1;
1951 else
1952 return 0;
1953 }
1954
1955 static int dgram_sctp_puts(BIO *bp, const char *str)
1956 {
1957 int n, ret;
1958
1959 n = strlen(str);
1960 ret = dgram_sctp_write(bp, str, n);
1961 return (ret);
1962 }
1963 # endif
1964
1965 static int BIO_dgram_should_retry(int i)
1966 {
1967 int err;
1968
1969 if ((i == 0) || (i == -1)) {
1970 err = get_last_socket_error();
1971
1972 # if defined(OPENSSL_SYS_WINDOWS)
1973 /*
1974 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1975 * this point, the error code was overwritten by another system call
1976 * before this error handling is called.
1977 */
1978 # endif
1979
1980 return (BIO_dgram_non_fatal_error(err));
1981 }
1982 return (0);
1983 }
1984
1985 int BIO_dgram_non_fatal_error(int err)
1986 {
1987 switch (err) {
1988 # if defined(OPENSSL_SYS_WINDOWS)
1989 # if defined(WSAEWOULDBLOCK)
1990 case WSAEWOULDBLOCK:
1991 # endif
1992 # endif
1993
1994 # ifdef EWOULDBLOCK
1995 # ifdef WSAEWOULDBLOCK
1996 # if WSAEWOULDBLOCK != EWOULDBLOCK
1997 case EWOULDBLOCK:
1998 # endif
1999 # else
2000 case EWOULDBLOCK:
2001 # endif
2002 # endif
2003
2004 # ifdef EINTR
2005 case EINTR:
2006 # endif
2007
2008 # ifdef EAGAIN
2009 # if EWOULDBLOCK != EAGAIN
2010 case EAGAIN:
2011 # endif
2012 # endif
2013
2014 # ifdef EPROTO
2015 case EPROTO:
2016 # endif
2017
2018 # ifdef EINPROGRESS
2019 case EINPROGRESS:
2020 # endif
2021
2022 # ifdef EALREADY
2023 case EALREADY:
2024 # endif
2025
2026 return (1);
2027 /* break; */
2028 default:
2029 break;
2030 }
2031 return (0);
2032 }
2033
2034 static void get_current_time(struct timeval *t)
2035 {
2036 # if defined(_WIN32)
2037 SYSTEMTIME st;
2038 union {
2039 unsigned __int64 ul;
2040 FILETIME ft;
2041 } now;
2042
2043 GetSystemTime(&st);
2044 SystemTimeToFileTime(&st, &now.ft);
2045 # ifdef __MINGW32__
2046 now.ul -= 116444736000000000ULL;
2047 # else
2048 now.ul -= 116444736000000000UI64; /* re-bias to 1/1/1970 */
2049 # endif
2050 t->tv_sec = (long)(now.ul / 10000000);
2051 t->tv_usec = ((int)(now.ul % 10000000)) / 10;
2052 # elif defined(OPENSSL_SYS_VMS)
2053 struct timeb tb;
2054 ftime(&tb);
2055 t->tv_sec = (long)tb.time;
2056 t->tv_usec = (long)tb.millitm * 1000;
2057 # else
2058 gettimeofday(t, NULL);
2059 # endif
2060 }
2061
2062 #endif
A mirror of the official openssl repository