]> git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/bio/bss_dgram.c
projects / thirdparty / openssl.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Run util/openssl-format-source -v -c .
[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 # if 0 /* higher layers are responsible for querying
454 * MTU, if necessary */
455 if (data->_errno == EMSGSIZE)
456 /* retrieve the new MTU */
457 BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
458 # endif
459 }
460 }
461 return (ret);
462 }
463
464 static long dgram_get_mtu_overhead(bio_dgram_data *data)
465 {
466 long ret;
467
468 switch (data->peer.sa.sa_family) {
469 case AF_INET:
470 /*
471 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
472 */
473 ret = 28;
474 break;
475 # if OPENSSL_USE_IPV6
476 case AF_INET6:
477 # ifdef IN6_IS_ADDR_V4MAPPED
478 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
479 /*
480 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
481 */
482 ret = 28;
483 else
484 # endif
485 /*
486 * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
487 */
488 ret = 48;
489 break;
490 # endif
491 default:
492 /* We don't know. Go with the historical default */
493 ret = 28;
494 break;
495 }
496 return ret;
497 }
498
499 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
500 {
501 long ret = 1;
502 int *ip;
503 struct sockaddr *to = NULL;
504 bio_dgram_data *data = NULL;
505 int sockopt_val = 0;
506 # if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
507 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
508 * modern enough to define socklen_t */
509 socklen_t addr_len;
510 union {
511 struct sockaddr sa;
512 struct sockaddr_in s4;
513 # if OPENSSL_USE_IPV6
514 struct sockaddr_in6 s6;
515 # endif
516 } addr;
517 # endif
518
519 data = (bio_dgram_data *)b->ptr;
520
521 switch (cmd) {
522 case BIO_CTRL_RESET:
523 num = 0;
524 case BIO_C_FILE_SEEK:
525 ret = 0;
526 break;
527 case BIO_C_FILE_TELL:
528 case BIO_CTRL_INFO:
529 ret = 0;
530 break;
531 case BIO_C_SET_FD:
532 dgram_clear(b);
533 b->num = *((int *)ptr);
534 b->shutdown = (int)num;
535 b->init = 1;
536 break;
537 case BIO_C_GET_FD:
538 if (b->init) {
539 ip = (int *)ptr;
540 if (ip != NULL)
541 *ip = b->num;
542 ret = b->num;
543 } else
544 ret = -1;
545 break;
546 case BIO_CTRL_GET_CLOSE:
547 ret = b->shutdown;
548 break;
549 case BIO_CTRL_SET_CLOSE:
550 b->shutdown = (int)num;
551 break;
552 case BIO_CTRL_PENDING:
553 case BIO_CTRL_WPENDING:
554 ret = 0;
555 break;
556 case BIO_CTRL_DUP:
557 case BIO_CTRL_FLUSH:
558 ret = 1;
559 break;
560 case BIO_CTRL_DGRAM_CONNECT:
561 to = (struct sockaddr *)ptr;
562 # if 0
563 if (connect(b->num, to, sizeof(struct sockaddr)) < 0) {
564 perror("connect");
565 ret = 0;
566 } else {
567 # endif
568 switch (to->sa_family) {
569 case AF_INET:
570 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
571 break;
572 # if OPENSSL_USE_IPV6
573 case AF_INET6:
574 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
575 break;
576 # endif
577 default:
578 memcpy(&data->peer, to, sizeof(data->peer.sa));
579 break;
580 }
581 # if 0
582 }
583 # endif
584 break;
585 /* (Linux)kernel sets DF bit on outgoing IP packets */
586 case BIO_CTRL_DGRAM_MTU_DISCOVER:
587 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
588 addr_len = (socklen_t) sizeof(addr);
589 memset((void *)&addr, 0, sizeof(addr));
590 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
591 ret = 0;
592 break;
593 }
594 switch (addr.sa.sa_family) {
595 case AF_INET:
596 sockopt_val = IP_PMTUDISC_DO;
597 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
598 &sockopt_val, sizeof(sockopt_val))) < 0)
599 perror("setsockopt");
600 break;
601 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
602 case AF_INET6:
603 sockopt_val = IPV6_PMTUDISC_DO;
604 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
605 &sockopt_val, sizeof(sockopt_val))) < 0)
606 perror("setsockopt");
607 break;
608 # endif
609 default:
610 ret = -1;
611 break;
612 }
613 # else
614 ret = -1;
615 # endif
616 break;
617 case BIO_CTRL_DGRAM_QUERY_MTU:
618 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
619 addr_len = (socklen_t) sizeof(addr);
620 memset((void *)&addr, 0, sizeof(addr));
621 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
622 ret = 0;
623 break;
624 }
625 sockopt_len = sizeof(sockopt_val);
626 switch (addr.sa.sa_family) {
627 case AF_INET:
628 if ((ret =
629 getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
630 &sockopt_len)) < 0 || sockopt_val < 0) {
631 ret = 0;
632 } else {
633 /*
634 * we assume that the transport protocol is UDP and no IP
635 * options are used.
636 */
637 data->mtu = sockopt_val - 8 - 20;
638 ret = data->mtu;
639 }
640 break;
641 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
642 case AF_INET6:
643 if ((ret =
644 getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
645 (void *)&sockopt_val, &sockopt_len)) < 0
646 || sockopt_val < 0) {
647 ret = 0;
648 } else {
649 /*
650 * we assume that the transport protocol is UDP and no IPV6
651 * options are used.
652 */
653 data->mtu = sockopt_val - 8 - 40;
654 ret = data->mtu;
655 }
656 break;
657 # endif
658 default:
659 ret = 0;
660 break;
661 }
662 # else
663 ret = 0;
664 # endif
665 break;
666 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
667 ret = -dgram_get_mtu_overhead(data);
668 switch (data->peer.sa.sa_family) {
669 case AF_INET:
670 ret += 576;
671 break;
672 # if OPENSSL_USE_IPV6
673 case AF_INET6:
674 # ifdef IN6_IS_ADDR_V4MAPPED
675 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
676 ret += 576;
677 else
678 # endif
679 ret += 1280;
680 break;
681 # endif
682 default:
683 ret += 576;
684 break;
685 }
686 break;
687 case BIO_CTRL_DGRAM_GET_MTU:
688 return data->mtu;
689 break;
690 case BIO_CTRL_DGRAM_SET_MTU:
691 data->mtu = num;
692 ret = num;
693 break;
694 case BIO_CTRL_DGRAM_SET_CONNECTED:
695 to = (struct sockaddr *)ptr;
696
697 if (to != NULL) {
698 data->connected = 1;
699 switch (to->sa_family) {
700 case AF_INET:
701 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
702 break;
703 # if OPENSSL_USE_IPV6
704 case AF_INET6:
705 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
706 break;
707 # endif
708 default:
709 memcpy(&data->peer, to, sizeof(data->peer.sa));
710 break;
711 }
712 } else {
713 data->connected = 0;
714 memset(&(data->peer), 0x00, sizeof(data->peer));
715 }
716 break;
717 case BIO_CTRL_DGRAM_GET_PEER:
718 switch (data->peer.sa.sa_family) {
719 case AF_INET:
720 ret = sizeof(data->peer.sa_in);
721 break;
722 # if OPENSSL_USE_IPV6
723 case AF_INET6:
724 ret = sizeof(data->peer.sa_in6);
725 break;
726 # endif
727 default:
728 ret = sizeof(data->peer.sa);
729 break;
730 }
731 if (num == 0 || num > ret)
732 num = ret;
733 memcpy(ptr, &data->peer, (ret = num));
734 break;
735 case BIO_CTRL_DGRAM_SET_PEER:
736 to = (struct sockaddr *)ptr;
737 switch (to->sa_family) {
738 case AF_INET:
739 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
740 break;
741 # if OPENSSL_USE_IPV6
742 case AF_INET6:
743 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
744 break;
745 # endif
746 default:
747 memcpy(&data->peer, to, sizeof(data->peer.sa));
748 break;
749 }
750 break;
751 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
752 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
753 break;
754 # if defined(SO_RCVTIMEO)
755 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
756 # ifdef OPENSSL_SYS_WINDOWS
757 {
758 struct timeval *tv = (struct timeval *)ptr;
759 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
760 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
761 (void *)&timeout, sizeof(timeout)) < 0) {
762 perror("setsockopt");
763 ret = -1;
764 }
765 }
766 # else
767 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
768 sizeof(struct timeval)) < 0) {
769 perror("setsockopt");
770 ret = -1;
771 }
772 # endif
773 break;
774 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
775 {
776 union {
777 size_t s;
778 int i;
779 } sz = {
780 0
781 };
782 # ifdef OPENSSL_SYS_WINDOWS
783 int timeout;
784 struct timeval *tv = (struct timeval *)ptr;
785
786 sz.i = sizeof(timeout);
787 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
788 (void *)&timeout, &sz.i) < 0) {
789 perror("getsockopt");
790 ret = -1;
791 } else {
792 tv->tv_sec = timeout / 1000;
793 tv->tv_usec = (timeout % 1000) * 1000;
794 ret = sizeof(*tv);
795 }
796 # else
797 sz.i = sizeof(struct timeval);
798 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
799 ptr, (void *)&sz) < 0) {
800 perror("getsockopt");
801 ret = -1;
802 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
803 OPENSSL_assert(sz.s <= sizeof(struct timeval));
804 ret = (int)sz.s;
805 } else
806 ret = sz.i;
807 # endif
808 }
809 break;
810 # endif
811 # if defined(SO_SNDTIMEO)
812 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
813 # ifdef OPENSSL_SYS_WINDOWS
814 {
815 struct timeval *tv = (struct timeval *)ptr;
816 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
817 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
818 (void *)&timeout, sizeof(timeout)) < 0) {
819 perror("setsockopt");
820 ret = -1;
821 }
822 }
823 # else
824 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
825 sizeof(struct timeval)) < 0) {
826 perror("setsockopt");
827 ret = -1;
828 }
829 # endif
830 break;
831 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
832 {
833 union {
834 size_t s;
835 int i;
836 } sz = {
837 0
838 };
839 # ifdef OPENSSL_SYS_WINDOWS
840 int timeout;
841 struct timeval *tv = (struct timeval *)ptr;
842
843 sz.i = sizeof(timeout);
844 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
845 (void *)&timeout, &sz.i) < 0) {
846 perror("getsockopt");
847 ret = -1;
848 } else {
849 tv->tv_sec = timeout / 1000;
850 tv->tv_usec = (timeout % 1000) * 1000;
851 ret = sizeof(*tv);
852 }
853 # else
854 sz.i = sizeof(struct timeval);
855 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
856 ptr, (void *)&sz) < 0) {
857 perror("getsockopt");
858 ret = -1;
859 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
860 OPENSSL_assert(sz.s <= sizeof(struct timeval));
861 ret = (int)sz.s;
862 } else
863 ret = sz.i;
864 # endif
865 }
866 break;
867 # endif
868 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
869 /* fall-through */
870 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
871 # ifdef OPENSSL_SYS_WINDOWS
872 if (data->_errno == WSAETIMEDOUT)
873 # else
874 if (data->_errno == EAGAIN)
875 # endif
876 {
877 ret = 1;
878 data->_errno = 0;
879 } else
880 ret = 0;
881 break;
882 # ifdef EMSGSIZE
883 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
884 if (data->_errno == EMSGSIZE) {
885 ret = 1;
886 data->_errno = 0;
887 } else
888 ret = 0;
889 break;
890 # endif
891 case BIO_CTRL_DGRAM_SET_DONT_FRAG:
892 sockopt_val = num ? 1 : 0;
893
894 switch (data->peer.sa.sa_family) {
895 case AF_INET:
896 # if defined(IP_DONTFRAG)
897 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG,
898 &sockopt_val, sizeof(sockopt_val))) < 0) {
899 perror("setsockopt");
900 ret = -1;
901 }
902 # elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTUDISCOVER)
903 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
904 (ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
905 &sockopt_val, sizeof(sockopt_val))) < 0) {
906 perror("setsockopt");
907 ret = -1;
908 }
909 # elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT)
910 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT,
911 (const char *)&sockopt_val,
912 sizeof(sockopt_val))) < 0) {
913 perror("setsockopt");
914 ret = -1;
915 }
916 # else
917 ret = -1;
918 # endif
919 break;
920 # if OPENSSL_USE_IPV6
921 case AF_INET6:
922 # if defined(IPV6_DONTFRAG)
923 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
924 (const void *)&sockopt_val,
925 sizeof(sockopt_val))) < 0) {
926 perror("setsockopt");
927 ret = -1;
928 }
929 # elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER)
930 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
931 (ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
932 &sockopt_val, sizeof(sockopt_val))) < 0) {
933 perror("setsockopt");
934 ret = -1;
935 }
936 # else
937 ret = -1;
938 # endif
939 break;
940 # endif
941 default:
942 ret = -1;
943 break;
944 }
945 break;
946 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
947 ret = dgram_get_mtu_overhead(data);
948 break;
949 default:
950 ret = 0;
951 break;
952 }
953 return (ret);
954 }
955
956 static int dgram_puts(BIO *bp, const char *str)
957 {
958 int n, ret;
959
960 n = strlen(str);
961 ret = dgram_write(bp, str, n);
962 return (ret);
963 }
964
965 # ifndef OPENSSL_NO_SCTP
966 BIO_METHOD *BIO_s_datagram_sctp(void)
967 {
968 return (&methods_dgramp_sctp);
969 }
970
971 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
972 {
973 BIO *bio;
974 int ret, optval = 20000;
975 int auth_data = 0, auth_forward = 0;
976 unsigned char *p;
977 struct sctp_authchunk auth;
978 struct sctp_authchunks *authchunks;
979 socklen_t sockopt_len;
980 # ifdef SCTP_AUTHENTICATION_EVENT
981 # ifdef SCTP_EVENT
982 struct sctp_event event;
983 # else
984 struct sctp_event_subscribe event;
985 # endif
986 # endif
987
988 bio = BIO_new(BIO_s_datagram_sctp());
989 if (bio == NULL)
990 return (NULL);
991 BIO_set_fd(bio, fd, close_flag);
992
993 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
994 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
995 ret =
996 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
997 sizeof(struct sctp_authchunk));
998 if (ret < 0) {
999 BIO_vfree(bio);
1000 return (NULL);
1001 }
1002 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
1003 ret =
1004 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
1005 sizeof(struct sctp_authchunk));
1006 if (ret < 0) {
1007 BIO_vfree(bio);
1008 return (NULL);
1009 }
1010
1011 /*
1012 * Test if activation was successful. When using accept(), SCTP-AUTH has
1013 * to be activated for the listening socket already, otherwise the
1014 * connected socket won't use it.
1015 */
1016 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1017 authchunks = OPENSSL_malloc(sockopt_len);
1018 memset(authchunks, 0, sockopt_len);
1019 ret =
1020 getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
1021 &sockopt_len);
1022
1023 if (ret < 0) {
1024 OPENSSL_free(authchunks);
1025 BIO_vfree(bio);
1026 return (NULL);
1027 }
1028
1029 for (p = (unsigned char *)authchunks->gauth_chunks;
1030 p < (unsigned char *)authchunks + sockopt_len;
1031 p += sizeof(uint8_t)) {
1032 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1033 auth_data = 1;
1034 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1035 auth_forward = 1;
1036 }
1037
1038 OPENSSL_free(authchunks);
1039
1040 OPENSSL_assert(auth_data);
1041 OPENSSL_assert(auth_forward);
1042
1043 # ifdef SCTP_AUTHENTICATION_EVENT
1044 # ifdef SCTP_EVENT
1045 memset(&event, 0, sizeof(struct sctp_event));
1046 event.se_assoc_id = 0;
1047 event.se_type = SCTP_AUTHENTICATION_EVENT;
1048 event.se_on = 1;
1049 ret =
1050 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
1051 sizeof(struct sctp_event));
1052 if (ret < 0) {
1053 BIO_vfree(bio);
1054 return (NULL);
1055 }
1056 # else
1057 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
1058 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
1059 if (ret < 0) {
1060 BIO_vfree(bio);
1061 return (NULL);
1062 }
1063
1064 event.sctp_authentication_event = 1;
1065
1066 ret =
1067 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
1068 sizeof(struct sctp_event_subscribe));
1069 if (ret < 0) {
1070 BIO_vfree(bio);
1071 return (NULL);
1072 }
1073 # endif
1074 # endif
1075
1076 /*
1077 * Disable partial delivery by setting the min size larger than the max
1078 * record size of 2^14 + 2048 + 13
1079 */
1080 ret =
1081 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
1082 sizeof(optval));
1083 if (ret < 0) {
1084 BIO_vfree(bio);
1085 return (NULL);
1086 }
1087
1088 return (bio);
1089 }
1090
1091 int BIO_dgram_is_sctp(BIO *bio)
1092 {
1093 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
1094 }
1095
1096 static int dgram_sctp_new(BIO *bi)
1097 {
1098 bio_dgram_sctp_data *data = NULL;
1099
1100 bi->init = 0;
1101 bi->num = 0;
1102 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
1103 if (data == NULL)
1104 return 0;
1105 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
1106 # ifdef SCTP_PR_SCTP_NONE
1107 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1108 # endif
1109 bi->ptr = data;
1110
1111 bi->flags = 0;
1112 return (1);
1113 }
1114
1115 static int dgram_sctp_free(BIO *a)
1116 {
1117 bio_dgram_sctp_data *data;
1118
1119 if (a == NULL)
1120 return (0);
1121 if (!dgram_clear(a))
1122 return 0;
1123
1124 data = (bio_dgram_sctp_data *) a->ptr;
1125 if (data != NULL) {
1126 if (data->saved_message.data != NULL)
1127 OPENSSL_free(data->saved_message.data);
1128 OPENSSL_free(data);
1129 }
1130
1131 return (1);
1132 }
1133
1134 # ifdef SCTP_AUTHENTICATION_EVENT
1135 void dgram_sctp_handle_auth_free_key_event(BIO *b,
1136 union sctp_notification *snp)
1137 {
1138 int ret;
1139 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
1140
1141 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
1142 struct sctp_authkeyid authkeyid;
1143
1144 /* delete key */
1145 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1146 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1147 &authkeyid, sizeof(struct sctp_authkeyid));
1148 }
1149 }
1150 # endif
1151
1152 static int dgram_sctp_read(BIO *b, char *out, int outl)
1153 {
1154 int ret = 0, n = 0, i, optval;
1155 socklen_t optlen;
1156 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1157 union sctp_notification *snp;
1158 struct msghdr msg;
1159 struct iovec iov;
1160 struct cmsghdr *cmsg;
1161 char cmsgbuf[512];
1162
1163 if (out != NULL) {
1164 clear_socket_error();
1165
1166 do {
1167 memset(&data->rcvinfo, 0x00,
1168 sizeof(struct bio_dgram_sctp_rcvinfo));
1169 iov.iov_base = out;
1170 iov.iov_len = outl;
1171 msg.msg_name = NULL;
1172 msg.msg_namelen = 0;
1173 msg.msg_iov = &iov;
1174 msg.msg_iovlen = 1;
1175 msg.msg_control = cmsgbuf;
1176 msg.msg_controllen = 512;
1177 msg.msg_flags = 0;
1178 n = recvmsg(b->num, &msg, 0);
1179
1180 if (n <= 0) {
1181 if (n < 0)
1182 ret = n;
1183 break;
1184 }
1185
1186 if (msg.msg_controllen > 0) {
1187 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1188 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1189 if (cmsg->cmsg_level != IPPROTO_SCTP)
1190 continue;
1191 # ifdef SCTP_RCVINFO
1192 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1193 struct sctp_rcvinfo *rcvinfo;
1194
1195 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1196 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1197 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1198 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1199 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1200 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1201 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1202 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1203 }
1204 # endif
1205 # ifdef SCTP_SNDRCV
1206 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1207 struct sctp_sndrcvinfo *sndrcvinfo;
1208
1209 sndrcvinfo =
1210 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1211 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1212 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1213 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1214 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1215 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1216 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1217 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1218 }
1219 # endif
1220 }
1221 }
1222
1223 if (msg.msg_flags & MSG_NOTIFICATION) {
1224 snp = (union sctp_notification *)out;
1225 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1226 # ifdef SCTP_EVENT
1227 struct sctp_event event;
1228 # else
1229 struct sctp_event_subscribe event;
1230 socklen_t eventsize;
1231 # endif
1232 /*
1233 * If a message has been delayed until the socket is dry,
1234 * it can be sent now.
1235 */
1236 if (data->saved_message.length > 0) {
1237 dgram_sctp_write(data->saved_message.bio,
1238 data->saved_message.data,
1239 data->saved_message.length);
1240 OPENSSL_free(data->saved_message.data);
1241 data->saved_message.data = NULL;
1242 data->saved_message.length = 0;
1243 }
1244
1245 /* disable sender dry event */
1246 # ifdef SCTP_EVENT
1247 memset(&event, 0, sizeof(struct sctp_event));
1248 event.se_assoc_id = 0;
1249 event.se_type = SCTP_SENDER_DRY_EVENT;
1250 event.se_on = 0;
1251 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1252 sizeof(struct sctp_event));
1253 if (i < 0) {
1254 ret = i;
1255 break;
1256 }
1257 # else
1258 eventsize = sizeof(struct sctp_event_subscribe);
1259 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1260 &eventsize);
1261 if (i < 0) {
1262 ret = i;
1263 break;
1264 }
1265
1266 event.sctp_sender_dry_event = 0;
1267
1268 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1269 sizeof(struct sctp_event_subscribe));
1270 if (i < 0) {
1271 ret = i;
1272 break;
1273 }
1274 # endif
1275 }
1276 # ifdef SCTP_AUTHENTICATION_EVENT
1277 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1278 dgram_sctp_handle_auth_free_key_event(b, snp);
1279 # endif
1280
1281 if (data->handle_notifications != NULL)
1282 data->handle_notifications(b, data->notification_context,
1283 (void *)out);
1284
1285 memset(out, 0, outl);
1286 } else
1287 ret += n;
1288 }
1289 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1290 && (ret < outl));
1291
1292 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1293 /* Partial message read, this should never happen! */
1294
1295 /*
1296 * The buffer was too small, this means the peer sent a message
1297 * that was larger than allowed.
1298 */
1299 if (ret == outl)
1300 return -1;
1301
1302 /*
1303 * Test if socket buffer can handle max record size (2^14 + 2048
1304 * + 13)
1305 */
1306 optlen = (socklen_t) sizeof(int);
1307 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1308 if (ret >= 0)
1309 OPENSSL_assert(optval >= 18445);
1310
1311 /*
1312 * Test if SCTP doesn't partially deliver below max record size
1313 * (2^14 + 2048 + 13)
1314 */
1315 optlen = (socklen_t) sizeof(int);
1316 ret =
1317 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1318 &optval, &optlen);
1319 if (ret >= 0)
1320 OPENSSL_assert(optval >= 18445);
1321
1322 /*
1323 * Partially delivered notification??? Probably a bug....
1324 */
1325 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1326
1327 /*
1328 * Everything seems ok till now, so it's most likely a message
1329 * dropped by PR-SCTP.
1330 */
1331 memset(out, 0, outl);
1332 BIO_set_retry_read(b);
1333 return -1;
1334 }
1335
1336 BIO_clear_retry_flags(b);
1337 if (ret < 0) {
1338 if (BIO_dgram_should_retry(ret)) {
1339 BIO_set_retry_read(b);
1340 data->_errno = get_last_socket_error();
1341 }
1342 }
1343
1344 /* Test if peer uses SCTP-AUTH before continuing */
1345 if (!data->peer_auth_tested) {
1346 int ii, auth_data = 0, auth_forward = 0;
1347 unsigned char *p;
1348 struct sctp_authchunks *authchunks;
1349
1350 optlen =
1351 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1352 authchunks = OPENSSL_malloc(optlen);
1353 memset(authchunks, 0, optlen);
1354 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1355 authchunks, &optlen);
1356
1357 if (ii >= 0)
1358 for (p = (unsigned char *)authchunks->gauth_chunks;
1359 p < (unsigned char *)authchunks + optlen;
1360 p += sizeof(uint8_t)) {
1361 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1362 auth_data = 1;
1363 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1364 auth_forward = 1;
1365 }
1366
1367 OPENSSL_free(authchunks);
1368
1369 if (!auth_data || !auth_forward) {
1370 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1371 return -1;
1372 }
1373
1374 data->peer_auth_tested = 1;
1375 }
1376 }
1377 return (ret);
1378 }
1379
1380 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1381 {
1382 int ret;
1383 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1384 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1385 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1386 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1387 struct iovec iov[1];
1388 struct msghdr msg;
1389 struct cmsghdr *cmsg;
1390 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1391 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1392 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1393 struct sctp_sndinfo *sndinfo;
1394 struct sctp_prinfo *prinfo;
1395 # else
1396 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1397 struct sctp_sndrcvinfo *sndrcvinfo;
1398 # endif
1399
1400 clear_socket_error();
1401
1402 /*
1403 * If we're send anything else than application data, disable all user
1404 * parameters and flags.
1405 */
1406 if (in[0] != 23) {
1407 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1408 # ifdef SCTP_SACK_IMMEDIATELY
1409 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1410 # endif
1411 sinfo = &handshake_sinfo;
1412 }
1413
1414 /*
1415 * If we have to send a shutdown alert message and the socket is not dry
1416 * yet, we have to save it and send it as soon as the socket gets dry.
1417 */
1418 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b)) {
1419 data->saved_message.bio = b;
1420 if (data->saved_message.data)
1421 OPENSSL_free(data->saved_message.data);
1422 data->saved_message.data = OPENSSL_malloc(inl);
1423 memcpy(data->saved_message.data, in, inl);
1424 data->saved_message.length = inl;
1425 return inl;
1426 }
1427
1428 iov[0].iov_base = (char *)in;
1429 iov[0].iov_len = inl;
1430 msg.msg_name = NULL;
1431 msg.msg_namelen = 0;
1432 msg.msg_iov = iov;
1433 msg.msg_iovlen = 1;
1434 msg.msg_control = (caddr_t) cmsgbuf;
1435 msg.msg_controllen = 0;
1436 msg.msg_flags = 0;
1437 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1438 cmsg = (struct cmsghdr *)cmsgbuf;
1439 cmsg->cmsg_level = IPPROTO_SCTP;
1440 cmsg->cmsg_type = SCTP_SNDINFO;
1441 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1442 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1443 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1444 sndinfo->snd_sid = sinfo->snd_sid;
1445 sndinfo->snd_flags = sinfo->snd_flags;
1446 sndinfo->snd_ppid = sinfo->snd_ppid;
1447 sndinfo->snd_context = sinfo->snd_context;
1448 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1449
1450 cmsg =
1451 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1452 cmsg->cmsg_level = IPPROTO_SCTP;
1453 cmsg->cmsg_type = SCTP_PRINFO;
1454 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1455 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1456 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1457 prinfo->pr_policy = pinfo->pr_policy;
1458 prinfo->pr_value = pinfo->pr_value;
1459 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1460 # else
1461 cmsg = (struct cmsghdr *)cmsgbuf;
1462 cmsg->cmsg_level = IPPROTO_SCTP;
1463 cmsg->cmsg_type = SCTP_SNDRCV;
1464 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1465 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1466 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1467 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1468 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1469 # ifdef __FreeBSD__
1470 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1471 # endif
1472 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1473 sndrcvinfo->sinfo_context = sinfo->snd_context;
1474 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1475 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1476 # endif
1477
1478 ret = sendmsg(b->num, &msg, 0);
1479
1480 BIO_clear_retry_flags(b);
1481 if (ret <= 0) {
1482 if (BIO_dgram_should_retry(ret)) {
1483 BIO_set_retry_write(b);
1484 data->_errno = get_last_socket_error();
1485 }
1486 }
1487 return (ret);
1488 }
1489
1490 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1491 {
1492 long ret = 1;
1493 bio_dgram_sctp_data *data = NULL;
1494 socklen_t sockopt_len = 0;
1495 struct sctp_authkeyid authkeyid;
1496 struct sctp_authkey *authkey = NULL;
1497
1498 data = (bio_dgram_sctp_data *) b->ptr;
1499
1500 switch (cmd) {
1501 case BIO_CTRL_DGRAM_QUERY_MTU:
1502 /*
1503 * Set to maximum (2^14) and ignore user input to enable transport
1504 * protocol fragmentation. Returns always 2^14.
1505 */
1506 data->mtu = 16384;
1507 ret = data->mtu;
1508 break;
1509 case BIO_CTRL_DGRAM_SET_MTU:
1510 /*
1511 * Set to maximum (2^14) and ignore input to enable transport
1512 * protocol fragmentation. Returns always 2^14.
1513 */
1514 data->mtu = 16384;
1515 ret = data->mtu;
1516 break;
1517 case BIO_CTRL_DGRAM_SET_CONNECTED:
1518 case BIO_CTRL_DGRAM_CONNECT:
1519 /* Returns always -1. */
1520 ret = -1;
1521 break;
1522 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1523 /*
1524 * SCTP doesn't need the DTLS timer Returns always 1.
1525 */
1526 break;
1527 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1528 /*
1529 * We allow transport protocol fragmentation so this is irrelevant
1530 */
1531 ret = 0;
1532 break;
1533 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1534 if (num > 0)
1535 data->in_handshake = 1;
1536 else
1537 data->in_handshake = 0;
1538
1539 ret =
1540 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1541 &data->in_handshake, sizeof(int));
1542 break;
1543 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1544 /*
1545 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1546 */
1547
1548 /* Get active key */
1549 sockopt_len = sizeof(struct sctp_authkeyid);
1550 ret =
1551 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1552 &sockopt_len);
1553 if (ret < 0)
1554 break;
1555
1556 /* Add new key */
1557 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1558 authkey = OPENSSL_malloc(sockopt_len);
1559 if (authkey == NULL) {
1560 ret = -1;
1561 break;
1562 }
1563 memset(authkey, 0x00, sockopt_len);
1564 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1565 # ifndef __FreeBSD__
1566 /*
1567 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1568 * and higher work without it.
1569 */
1570 authkey->sca_keylength = 64;
1571 # endif
1572 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1573
1574 ret =
1575 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1576 sockopt_len);
1577 OPENSSL_free(authkey);
1578 authkey = NULL;
1579 if (ret < 0)
1580 break;
1581
1582 /* Reset active key */
1583 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1584 &authkeyid, sizeof(struct sctp_authkeyid));
1585 if (ret < 0)
1586 break;
1587
1588 break;
1589 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1590 /* Returns 0 on success, -1 otherwise. */
1591
1592 /* Get active key */
1593 sockopt_len = sizeof(struct sctp_authkeyid);
1594 ret =
1595 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1596 &sockopt_len);
1597 if (ret < 0)
1598 break;
1599
1600 /* Set active key */
1601 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1602 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1603 &authkeyid, sizeof(struct sctp_authkeyid));
1604 if (ret < 0)
1605 break;
1606
1607 /*
1608 * CCS has been sent, so remember that and fall through to check if
1609 * we need to deactivate an old key
1610 */
1611 data->ccs_sent = 1;
1612
1613 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1614 /* Returns 0 on success, -1 otherwise. */
1615
1616 /*
1617 * Has this command really been called or is this just a
1618 * fall-through?
1619 */
1620 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1621 data->ccs_rcvd = 1;
1622
1623 /*
1624 * CSS has been both, received and sent, so deactivate an old key
1625 */
1626 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1627 /* Get active key */
1628 sockopt_len = sizeof(struct sctp_authkeyid);
1629 ret =
1630 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1631 &authkeyid, &sockopt_len);
1632 if (ret < 0)
1633 break;
1634
1635 /*
1636 * Deactivate key or delete second last key if
1637 * SCTP_AUTHENTICATION_EVENT is not available.
1638 */
1639 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1640 # ifdef SCTP_AUTH_DEACTIVATE_KEY
1641 sockopt_len = sizeof(struct sctp_authkeyid);
1642 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1643 &authkeyid, sockopt_len);
1644 if (ret < 0)
1645 break;
1646 # endif
1647 # ifndef SCTP_AUTHENTICATION_EVENT
1648 if (authkeyid.scact_keynumber > 0) {
1649 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1650 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1651 &authkeyid, sizeof(struct sctp_authkeyid));
1652 if (ret < 0)
1653 break;
1654 }
1655 # endif
1656
1657 data->ccs_rcvd = 0;
1658 data->ccs_sent = 0;
1659 }
1660 break;
1661 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1662 /* Returns the size of the copied struct. */
1663 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1664 num = sizeof(struct bio_dgram_sctp_sndinfo);
1665
1666 memcpy(ptr, &(data->sndinfo), num);
1667 ret = num;
1668 break;
1669 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1670 /* Returns the size of the copied struct. */
1671 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1672 num = sizeof(struct bio_dgram_sctp_sndinfo);
1673
1674 memcpy(&(data->sndinfo), ptr, num);
1675 break;
1676 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1677 /* Returns the size of the copied struct. */
1678 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1679 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1680
1681 memcpy(ptr, &data->rcvinfo, num);
1682
1683 ret = num;
1684 break;
1685 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1686 /* Returns the size of the copied struct. */
1687 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1688 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1689
1690 memcpy(&(data->rcvinfo), ptr, num);
1691 break;
1692 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1693 /* Returns the size of the copied struct. */
1694 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1695 num = sizeof(struct bio_dgram_sctp_prinfo);
1696
1697 memcpy(ptr, &(data->prinfo), num);
1698 ret = num;
1699 break;
1700 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1701 /* Returns the size of the copied struct. */
1702 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1703 num = sizeof(struct bio_dgram_sctp_prinfo);
1704
1705 memcpy(&(data->prinfo), ptr, num);
1706 break;
1707 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1708 /* Returns always 1. */
1709 if (num > 0)
1710 data->save_shutdown = 1;
1711 else
1712 data->save_shutdown = 0;
1713 break;
1714
1715 default:
1716 /*
1717 * Pass to default ctrl function to process SCTP unspecific commands
1718 */
1719 ret = dgram_ctrl(b, cmd, num, ptr);
1720 break;
1721 }
1722 return (ret);
1723 }
1724
1725 int BIO_dgram_sctp_notification_cb(BIO *b,
1726 void (*handle_notifications) (BIO *bio,
1727 void
1728 *context,
1729 void *buf),
1730 void *context)
1731 {
1732 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1733
1734 if (handle_notifications != NULL) {
1735 data->handle_notifications = handle_notifications;
1736 data->notification_context = context;
1737 } else
1738 return -1;
1739
1740 return 0;
1741 }
1742
1743 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1744 {
1745 int is_dry = 0;
1746 int n, sockflags, ret;
1747 union sctp_notification snp;
1748 struct msghdr msg;
1749 struct iovec iov;
1750 # ifdef SCTP_EVENT
1751 struct sctp_event event;
1752 # else
1753 struct sctp_event_subscribe event;
1754 socklen_t eventsize;
1755 # endif
1756 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1757
1758 /* set sender dry event */
1759 # ifdef SCTP_EVENT
1760 memset(&event, 0, sizeof(struct sctp_event));
1761 event.se_assoc_id = 0;
1762 event.se_type = SCTP_SENDER_DRY_EVENT;
1763 event.se_on = 1;
1764 ret =
1765 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1766 sizeof(struct sctp_event));
1767 # else
1768 eventsize = sizeof(struct sctp_event_subscribe);
1769 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1770 if (ret < 0)
1771 return -1;
1772
1773 event.sctp_sender_dry_event = 1;
1774
1775 ret =
1776 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1777 sizeof(struct sctp_event_subscribe));
1778 # endif
1779 if (ret < 0)
1780 return -1;
1781
1782 /* peek for notification */
1783 memset(&snp, 0x00, sizeof(union sctp_notification));
1784 iov.iov_base = (char *)&snp;
1785 iov.iov_len = sizeof(union sctp_notification);
1786 msg.msg_name = NULL;
1787 msg.msg_namelen = 0;
1788 msg.msg_iov = &iov;
1789 msg.msg_iovlen = 1;
1790 msg.msg_control = NULL;
1791 msg.msg_controllen = 0;
1792 msg.msg_flags = 0;
1793
1794 n = recvmsg(b->num, &msg, MSG_PEEK);
1795 if (n <= 0) {
1796 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1797 && (get_last_socket_error() != EWOULDBLOCK))
1798 return -1;
1799 else
1800 return 0;
1801 }
1802
1803 /* if we find a notification, process it and try again if necessary */
1804 while (msg.msg_flags & MSG_NOTIFICATION) {
1805 memset(&snp, 0x00, sizeof(union sctp_notification));
1806 iov.iov_base = (char *)&snp;
1807 iov.iov_len = sizeof(union sctp_notification);
1808 msg.msg_name = NULL;
1809 msg.msg_namelen = 0;
1810 msg.msg_iov = &iov;
1811 msg.msg_iovlen = 1;
1812 msg.msg_control = NULL;
1813 msg.msg_controllen = 0;
1814 msg.msg_flags = 0;
1815
1816 n = recvmsg(b->num, &msg, 0);
1817 if (n <= 0) {
1818 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1819 && (get_last_socket_error() != EWOULDBLOCK))
1820 return -1;
1821 else
1822 return is_dry;
1823 }
1824
1825 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1826 is_dry = 1;
1827
1828 /* disable sender dry event */
1829 # ifdef SCTP_EVENT
1830 memset(&event, 0, sizeof(struct sctp_event));
1831 event.se_assoc_id = 0;
1832 event.se_type = SCTP_SENDER_DRY_EVENT;
1833 event.se_on = 0;
1834 ret =
1835 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1836 sizeof(struct sctp_event));
1837 # else
1838 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1839 ret =
1840 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1841 &eventsize);
1842 if (ret < 0)
1843 return -1;
1844
1845 event.sctp_sender_dry_event = 0;
1846
1847 ret =
1848 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1849 sizeof(struct sctp_event_subscribe));
1850 # endif
1851 if (ret < 0)
1852 return -1;
1853 }
1854 # ifdef SCTP_AUTHENTICATION_EVENT
1855 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1856 dgram_sctp_handle_auth_free_key_event(b, &snp);
1857 # endif
1858
1859 if (data->handle_notifications != NULL)
1860 data->handle_notifications(b, data->notification_context,
1861 (void *)&snp);
1862
1863 /* found notification, peek again */
1864 memset(&snp, 0x00, sizeof(union sctp_notification));
1865 iov.iov_base = (char *)&snp;
1866 iov.iov_len = sizeof(union sctp_notification);
1867 msg.msg_name = NULL;
1868 msg.msg_namelen = 0;
1869 msg.msg_iov = &iov;
1870 msg.msg_iovlen = 1;
1871 msg.msg_control = NULL;
1872 msg.msg_controllen = 0;
1873 msg.msg_flags = 0;
1874
1875 /* if we have seen the dry already, don't wait */
1876 if (is_dry) {
1877 sockflags = fcntl(b->num, F_GETFL, 0);
1878 fcntl(b->num, F_SETFL, O_NONBLOCK);
1879 }
1880
1881 n = recvmsg(b->num, &msg, MSG_PEEK);
1882
1883 if (is_dry) {
1884 fcntl(b->num, F_SETFL, sockflags);
1885 }
1886
1887 if (n <= 0) {
1888 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1889 && (get_last_socket_error() != EWOULDBLOCK))
1890 return -1;
1891 else
1892 return is_dry;
1893 }
1894 }
1895
1896 /* read anything else */
1897 return is_dry;
1898 }
1899
1900 int BIO_dgram_sctp_msg_waiting(BIO *b)
1901 {
1902 int n, sockflags;
1903 union sctp_notification snp;
1904 struct msghdr msg;
1905 struct iovec iov;
1906 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1907
1908 /* Check if there are any messages waiting to be read */
1909 do {
1910 memset(&snp, 0x00, sizeof(union sctp_notification));
1911 iov.iov_base = (char *)&snp;
1912 iov.iov_len = sizeof(union sctp_notification);
1913 msg.msg_name = NULL;
1914 msg.msg_namelen = 0;
1915 msg.msg_iov = &iov;
1916 msg.msg_iovlen = 1;
1917 msg.msg_control = NULL;
1918 msg.msg_controllen = 0;
1919 msg.msg_flags = 0;
1920
1921 sockflags = fcntl(b->num, F_GETFL, 0);
1922 fcntl(b->num, F_SETFL, O_NONBLOCK);
1923 n = recvmsg(b->num, &msg, MSG_PEEK);
1924 fcntl(b->num, F_SETFL, sockflags);
1925
1926 /* if notification, process and try again */
1927 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1928 # ifdef SCTP_AUTHENTICATION_EVENT
1929 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1930 dgram_sctp_handle_auth_free_key_event(b, &snp);
1931 # endif
1932
1933 memset(&snp, 0x00, sizeof(union sctp_notification));
1934 iov.iov_base = (char *)&snp;
1935 iov.iov_len = sizeof(union sctp_notification);
1936 msg.msg_name = NULL;
1937 msg.msg_namelen = 0;
1938 msg.msg_iov = &iov;
1939 msg.msg_iovlen = 1;
1940 msg.msg_control = NULL;
1941 msg.msg_controllen = 0;
1942 msg.msg_flags = 0;
1943 n = recvmsg(b->num, &msg, 0);
1944
1945 if (data->handle_notifications != NULL)
1946 data->handle_notifications(b, data->notification_context,
1947 (void *)&snp);
1948 }
1949
1950 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1951
1952 /* Return 1 if there is a message to be read, return 0 otherwise. */
1953 if (n > 0)
1954 return 1;
1955 else
1956 return 0;
1957 }
1958
1959 static int dgram_sctp_puts(BIO *bp, const char *str)
1960 {
1961 int n, ret;
1962
1963 n = strlen(str);
1964 ret = dgram_sctp_write(bp, str, n);
1965 return (ret);
1966 }
1967 # endif
1968
1969 static int BIO_dgram_should_retry(int i)
1970 {
1971 int err;
1972
1973 if ((i == 0) || (i == -1)) {
1974 err = get_last_socket_error();
1975
1976 # if defined(OPENSSL_SYS_WINDOWS)
1977 /*
1978 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1979 * this point, the error code was overwritten by another system call
1980 * before this error handling is called.
1981 */
1982 # endif
1983
1984 return (BIO_dgram_non_fatal_error(err));
1985 }
1986 return (0);
1987 }
1988
1989 int BIO_dgram_non_fatal_error(int err)
1990 {
1991 switch (err) {
1992 # if defined(OPENSSL_SYS_WINDOWS)
1993 # if defined(WSAEWOULDBLOCK)
1994 case WSAEWOULDBLOCK:
1995 # endif
1996
1997 # if 0 /* This appears to always be an error */
1998 # if defined(WSAENOTCONN)
1999 case WSAENOTCONN:
2000 # endif
2001 # endif
2002 # endif
2003
2004 # ifdef EWOULDBLOCK
2005 # ifdef WSAEWOULDBLOCK
2006 # if WSAEWOULDBLOCK != EWOULDBLOCK
2007 case EWOULDBLOCK:
2008 # endif
2009 # else
2010 case EWOULDBLOCK:
2011 # endif
2012 # endif
2013
2014 # ifdef EINTR
2015 case EINTR:
2016 # endif
2017
2018 # ifdef EAGAIN
2019 # if EWOULDBLOCK != EAGAIN
2020 case EAGAIN:
2021 # endif
2022 # endif
2023
2024 # ifdef EPROTO
2025 case EPROTO:
2026 # endif
2027
2028 # ifdef EINPROGRESS
2029 case EINPROGRESS:
2030 # endif
2031
2032 # ifdef EALREADY
2033 case EALREADY:
2034 # endif
2035
2036 return (1);
2037 /* break; */
2038 default:
2039 break;
2040 }
2041 return (0);
2042 }
2043
2044 static void get_current_time(struct timeval *t)
2045 {
2046 # if defined(_WIN32)
2047 SYSTEMTIME st;
2048 union {
2049 unsigned __int64 ul;
2050 FILETIME ft;
2051 } now;
2052
2053 GetSystemTime(&st);
2054 SystemTimeToFileTime(&st, &now.ft);
2055 # ifdef __MINGW32__
2056 now.ul -= 116444736000000000ULL;
2057 # else
2058 now.ul -= 116444736000000000U I64; /* re-bias to 1/1/1970 */
2059 # endif
2060 t->tv_sec = (long)(now.ul / 10000000);
2061 t->tv_usec = ((int)(now.ul % 10000000)) / 10;
2062 # elif defined(OPENSSL_SYS_VMS)
2063 struct timeb tb;
2064 ftime(&tb);
2065 t->tv_sec = (long)tb.time;
2066 t->tv_usec = (long)tb.millitm * 1000;
2067 # else
2068 gettimeofday(t, NULL);
2069 # endif
2070 }
2071
2072 #endif
A mirror of the official openssl repository