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(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS)
69 # include <sys/timeb.h>
70 # endif
71
72 # ifndef OPENSSL_NO_SCTP
73 # include <netinet/sctp.h>
74 # include <fcntl.h>
75 # define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
76 # define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
77 # endif
78
79 # if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
80 # define IP_MTU 14 /* linux is lame */
81 # endif
82
83 # if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
84 /* Standard definition causes type-punning problems. */
85 # undef IN6_IS_ADDR_V4MAPPED
86 # define s6_addr32 __u6_addr.__u6_addr32
87 # define IN6_IS_ADDR_V4MAPPED(a) \
88 (((a)->s6_addr32[0] == 0) && \
89 ((a)->s6_addr32[1] == 0) && \
90 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
91 # endif
92
93 # ifdef WATT32
94 # define sock_write SockWrite /* Watt-32 uses same names */
95 # define sock_read SockRead
96 # define sock_puts SockPuts
97 # endif
98
99 static int dgram_write(BIO *h, const char *buf, int num);
100 static int dgram_read(BIO *h, char *buf, int size);
101 static int dgram_puts(BIO *h, const char *str);
102 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
103 static int dgram_new(BIO *h);
104 static int dgram_free(BIO *data);
105 static int dgram_clear(BIO *bio);
106
107 # ifndef OPENSSL_NO_SCTP
108 static int dgram_sctp_write(BIO *h, const char *buf, int num);
109 static int dgram_sctp_read(BIO *h, char *buf, int size);
110 static int dgram_sctp_puts(BIO *h, const char *str);
111 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
112 static int dgram_sctp_new(BIO *h);
113 static int dgram_sctp_free(BIO *data);
114 # ifdef SCTP_AUTHENTICATION_EVENT
115 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification
116 *snp);
117 # endif
118 # endif
119
120 static int BIO_dgram_should_retry(int s);
121
122 static void get_current_time(struct timeval *t);
123
124 static BIO_METHOD methods_dgramp = {
125 BIO_TYPE_DGRAM,
126 "datagram socket",
127 dgram_write,
128 dgram_read,
129 dgram_puts,
130 NULL, /* dgram_gets, */
131 dgram_ctrl,
132 dgram_new,
133 dgram_free,
134 NULL,
135 };
136
137 # ifndef OPENSSL_NO_SCTP
138 static BIO_METHOD methods_dgramp_sctp = {
139 BIO_TYPE_DGRAM_SCTP,
140 "datagram sctp socket",
141 dgram_sctp_write,
142 dgram_sctp_read,
143 dgram_sctp_puts,
144 NULL, /* dgram_gets, */
145 dgram_sctp_ctrl,
146 dgram_sctp_new,
147 dgram_sctp_free,
148 NULL,
149 };
150 # endif
151
152 typedef struct bio_dgram_data_st {
153 union {
154 struct sockaddr sa;
155 struct sockaddr_in sa_in;
156 # if OPENSSL_USE_IPV6
157 struct sockaddr_in6 sa_in6;
158 # endif
159 } peer;
160 unsigned int connected;
161 unsigned int _errno;
162 unsigned int mtu;
163 struct timeval next_timeout;
164 struct timeval socket_timeout;
165 } bio_dgram_data;
166
167 # ifndef OPENSSL_NO_SCTP
168 typedef struct bio_dgram_sctp_save_message_st {
169 BIO *bio;
170 char *data;
171 int length;
172 } bio_dgram_sctp_save_message;
173
174 typedef struct bio_dgram_sctp_data_st {
175 union {
176 struct sockaddr sa;
177 struct sockaddr_in sa_in;
178 # if OPENSSL_USE_IPV6
179 struct sockaddr_in6 sa_in6;
180 # endif
181 } peer;
182 unsigned int connected;
183 unsigned int _errno;
184 unsigned int mtu;
185 struct bio_dgram_sctp_sndinfo sndinfo;
186 struct bio_dgram_sctp_rcvinfo rcvinfo;
187 struct bio_dgram_sctp_prinfo prinfo;
188 void (*handle_notifications) (BIO *bio, void *context, void *buf);
189 void *notification_context;
190 int in_handshake;
191 int ccs_rcvd;
192 int ccs_sent;
193 int save_shutdown;
194 int peer_auth_tested;
195 bio_dgram_sctp_save_message saved_message;
196 } bio_dgram_sctp_data;
197 # endif
198
BIO_s_datagram(void)199 BIO_METHOD *BIO_s_datagram(void)
200 {
201 return (&methods_dgramp);
202 }
203
BIO_new_dgram(int fd,int close_flag)204 BIO *BIO_new_dgram(int fd, int close_flag)
205 {
206 BIO *ret;
207
208 ret = BIO_new(BIO_s_datagram());
209 if (ret == NULL)
210 return (NULL);
211 BIO_set_fd(ret, fd, close_flag);
212 return (ret);
213 }
214
dgram_new(BIO * bi)215 static int dgram_new(BIO *bi)
216 {
217 bio_dgram_data *data = NULL;
218
219 bi->init = 0;
220 bi->num = 0;
221 data = OPENSSL_malloc(sizeof(bio_dgram_data));
222 if (data == NULL)
223 return 0;
224 memset(data, 0x00, sizeof(bio_dgram_data));
225 bi->ptr = data;
226
227 bi->flags = 0;
228 return (1);
229 }
230
dgram_free(BIO * a)231 static int dgram_free(BIO *a)
232 {
233 bio_dgram_data *data;
234
235 if (a == NULL)
236 return (0);
237 if (!dgram_clear(a))
238 return 0;
239
240 data = (bio_dgram_data *)a->ptr;
241 if (data != NULL)
242 OPENSSL_free(data);
243
244 return (1);
245 }
246
dgram_clear(BIO * a)247 static int dgram_clear(BIO *a)
248 {
249 if (a == NULL)
250 return (0);
251 if (a->shutdown) {
252 if (a->init) {
253 SHUTDOWN2(a->num);
254 }
255 a->init = 0;
256 a->flags = 0;
257 }
258 return (1);
259 }
260
dgram_adjust_rcv_timeout(BIO * b)261 static void dgram_adjust_rcv_timeout(BIO *b)
262 {
263 # if defined(SO_RCVTIMEO)
264 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
265 union {
266 size_t s;
267 int i;
268 } sz = {
269 0
270 };
271
272 /* Is a timer active? */
273 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
274 struct timeval timenow, timeleft;
275
276 /* Read current socket timeout */
277 # ifdef OPENSSL_SYS_WINDOWS
278 int timeout;
279
280 sz.i = sizeof(timeout);
281 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
282 (void *)&timeout, &sz.i) < 0) {
283 perror("getsockopt");
284 } else {
285 data->socket_timeout.tv_sec = timeout / 1000;
286 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
287 }
288 # else
289 sz.i = sizeof(data->socket_timeout);
290 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
291 &(data->socket_timeout), (void *)&sz) < 0) {
292 perror("getsockopt");
293 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0)
294 OPENSSL_assert(sz.s <= sizeof(data->socket_timeout));
295 # endif
296
297 /* Get current time */
298 get_current_time(&timenow);
299
300 /* Calculate time left until timer expires */
301 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
302 if (timeleft.tv_usec < timenow.tv_usec) {
303 timeleft.tv_usec = 1000000 - timenow.tv_usec + timeleft.tv_usec;
304 timeleft.tv_sec--;
305 } else {
306 timeleft.tv_usec -= timenow.tv_usec;
307 }
308 if (timeleft.tv_sec < timenow.tv_sec) {
309 timeleft.tv_sec = 0;
310 timeleft.tv_usec = 1;
311 } else {
312 timeleft.tv_sec -= timenow.tv_sec;
313 }
314
315 /*
316 * Adjust socket timeout if next handhake message timer will expire
317 * earlier.
318 */
319 if ((data->socket_timeout.tv_sec == 0
320 && data->socket_timeout.tv_usec == 0)
321 || (data->socket_timeout.tv_sec > timeleft.tv_sec)
322 || (data->socket_timeout.tv_sec == timeleft.tv_sec
323 && data->socket_timeout.tv_usec >= timeleft.tv_usec)) {
324 # ifdef OPENSSL_SYS_WINDOWS
325 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
326 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
327 (void *)&timeout, sizeof(timeout)) < 0) {
328 perror("setsockopt");
329 }
330 # else
331 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
332 sizeof(struct timeval)) < 0) {
333 perror("setsockopt");
334 }
335 # endif
336 }
337 }
338 # endif
339 }
340
dgram_reset_rcv_timeout(BIO * b)341 static void dgram_reset_rcv_timeout(BIO *b)
342 {
343 # if defined(SO_RCVTIMEO)
344 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
345
346 /* Is a timer active? */
347 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
348 # ifdef OPENSSL_SYS_WINDOWS
349 int timeout = data->socket_timeout.tv_sec * 1000 +
350 data->socket_timeout.tv_usec / 1000;
351 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
352 (void *)&timeout, sizeof(timeout)) < 0) {
353 perror("setsockopt");
354 }
355 # else
356 if (setsockopt
357 (b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
358 sizeof(struct timeval)) < 0) {
359 perror("setsockopt");
360 }
361 # endif
362 }
363 # endif
364 }
365
dgram_read(BIO * b,char * out,int outl)366 static int dgram_read(BIO *b, char *out, int outl)
367 {
368 int ret = 0;
369 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
370
371 struct {
372 /*
373 * See commentary in b_sock.c. <appro>
374 */
375 union {
376 size_t s;
377 int i;
378 } len;
379 union {
380 struct sockaddr sa;
381 struct sockaddr_in sa_in;
382 # if OPENSSL_USE_IPV6
383 struct sockaddr_in6 sa_in6;
384 # endif
385 } peer;
386 } sa;
387
388 sa.len.s = 0;
389 sa.len.i = sizeof(sa.peer);
390
391 if (out != NULL) {
392 clear_socket_error();
393 memset(&sa.peer, 0x00, sizeof(sa.peer));
394 dgram_adjust_rcv_timeout(b);
395 ret = recvfrom(b->num, out, outl, 0, &sa.peer.sa, (void *)&sa.len);
396 if (sizeof(sa.len.i) != sizeof(sa.len.s) && sa.len.i == 0) {
397 OPENSSL_assert(sa.len.s <= sizeof(sa.peer));
398 sa.len.i = (int)sa.len.s;
399 }
400
401 if (!data->connected && ret >= 0)
402 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
403
404 BIO_clear_retry_flags(b);
405 if (ret < 0) {
406 if (BIO_dgram_should_retry(ret)) {
407 BIO_set_retry_read(b);
408 data->_errno = get_last_socket_error();
409 }
410 }
411
412 dgram_reset_rcv_timeout(b);
413 }
414 return (ret);
415 }
416
dgram_write(BIO * b,const char * in,int inl)417 static int dgram_write(BIO *b, const char *in, int inl)
418 {
419 int ret;
420 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
421 clear_socket_error();
422
423 if (data->connected)
424 ret = writesocket(b->num, in, inl);
425 else {
426 int peerlen = sizeof(data->peer);
427
428 if (data->peer.sa.sa_family == AF_INET)
429 peerlen = sizeof(data->peer.sa_in);
430 # if OPENSSL_USE_IPV6
431 else if (data->peer.sa.sa_family == AF_INET6)
432 peerlen = sizeof(data->peer.sa_in6);
433 # endif
434 # if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
435 ret = sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
436 # else
437 ret = sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
438 # endif
439 }
440
441 BIO_clear_retry_flags(b);
442 if (ret <= 0) {
443 if (BIO_dgram_should_retry(ret)) {
444 BIO_set_retry_write(b);
445 data->_errno = get_last_socket_error();
446
447 # if 0 /* higher layers are responsible for querying
448 * MTU, if necessary */
449 if (data->_errno == EMSGSIZE)
450 /* retrieve the new MTU */
451 BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
452 # endif
453 }
454 }
455 return (ret);
456 }
457
dgram_get_mtu_overhead(bio_dgram_data * data)458 static long dgram_get_mtu_overhead(bio_dgram_data *data)
459 {
460 long ret;
461
462 switch (data->peer.sa.sa_family) {
463 case AF_INET:
464 /*
465 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
466 */
467 ret = 28;
468 break;
469 # if OPENSSL_USE_IPV6
470 case AF_INET6:
471 # ifdef IN6_IS_ADDR_V4MAPPED
472 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
473 /*
474 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
475 */
476 ret = 28;
477 else
478 # endif
479 /*
480 * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
481 */
482 ret = 48;
483 break;
484 # endif
485 default:
486 /* We don't know. Go with the historical default */
487 ret = 28;
488 break;
489 }
490 return ret;
491 }
492
dgram_ctrl(BIO * b,int cmd,long num,void * ptr)493 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
494 {
495 long ret = 1;
496 int *ip;
497 struct sockaddr *to = NULL;
498 bio_dgram_data *data = NULL;
499 # if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
500 int sockopt_val = 0;
501 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
502 * modern enough to define socklen_t */
503 socklen_t addr_len;
504 union {
505 struct sockaddr sa;
506 struct sockaddr_in s4;
507 # if OPENSSL_USE_IPV6
508 struct sockaddr_in6 s6;
509 # endif
510 } addr;
511 # endif
512
513 data = (bio_dgram_data *)b->ptr;
514
515 switch (cmd) {
516 case BIO_CTRL_RESET:
517 num = 0;
518 case BIO_C_FILE_SEEK:
519 ret = 0;
520 break;
521 case BIO_C_FILE_TELL:
522 case BIO_CTRL_INFO:
523 ret = 0;
524 break;
525 case BIO_C_SET_FD:
526 dgram_clear(b);
527 b->num = *((int *)ptr);
528 b->shutdown = (int)num;
529 b->init = 1;
530 break;
531 case BIO_C_GET_FD:
532 if (b->init) {
533 ip = (int *)ptr;
534 if (ip != NULL)
535 *ip = b->num;
536 ret = b->num;
537 } else
538 ret = -1;
539 break;
540 case BIO_CTRL_GET_CLOSE:
541 ret = b->shutdown;
542 break;
543 case BIO_CTRL_SET_CLOSE:
544 b->shutdown = (int)num;
545 break;
546 case BIO_CTRL_PENDING:
547 case BIO_CTRL_WPENDING:
548 ret = 0;
549 break;
550 case BIO_CTRL_DUP:
551 case BIO_CTRL_FLUSH:
552 ret = 1;
553 break;
554 case BIO_CTRL_DGRAM_CONNECT:
555 to = (struct sockaddr *)ptr;
556 # if 0
557 if (connect(b->num, to, sizeof(struct sockaddr)) < 0) {
558 perror("connect");
559 ret = 0;
560 } else {
561 # endif
562 switch (to->sa_family) {
563 case AF_INET:
564 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
565 break;
566 # if OPENSSL_USE_IPV6
567 case AF_INET6:
568 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
569 break;
570 # endif
571 default:
572 memcpy(&data->peer, to, sizeof(data->peer.sa));
573 break;
574 }
575 # if 0
576 }
577 # endif
578 break;
579 /* (Linux)kernel sets DF bit on outgoing IP packets */
580 case BIO_CTRL_DGRAM_MTU_DISCOVER:
581 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
582 addr_len = (socklen_t) sizeof(addr);
583 memset((void *)&addr, 0, sizeof(addr));
584 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
585 ret = 0;
586 break;
587 }
588 switch (addr.sa.sa_family) {
589 case AF_INET:
590 sockopt_val = IP_PMTUDISC_DO;
591 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
592 &sockopt_val, sizeof(sockopt_val))) < 0)
593 perror("setsockopt");
594 break;
595 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
596 case AF_INET6:
597 sockopt_val = IPV6_PMTUDISC_DO;
598 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
599 &sockopt_val, sizeof(sockopt_val))) < 0)
600 perror("setsockopt");
601 break;
602 # endif
603 default:
604 ret = -1;
605 break;
606 }
607 ret = -1;
608 # else
609 break;
610 # endif
611 case BIO_CTRL_DGRAM_QUERY_MTU:
612 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
613 addr_len = (socklen_t) sizeof(addr);
614 memset((void *)&addr, 0, sizeof(addr));
615 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
616 ret = 0;
617 break;
618 }
619 sockopt_len = sizeof(sockopt_val);
620 switch (addr.sa.sa_family) {
621 case AF_INET:
622 if ((ret =
623 getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
624 &sockopt_len)) < 0 || sockopt_val < 0) {
625 ret = 0;
626 } else {
627 /*
628 * we assume that the transport protocol is UDP and no IP
629 * options are used.
630 */
631 data->mtu = sockopt_val - 8 - 20;
632 ret = data->mtu;
633 }
634 break;
635 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
636 case AF_INET6:
637 if ((ret =
638 getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
639 (void *)&sockopt_val, &sockopt_len)) < 0
640 || sockopt_val < 0) {
641 ret = 0;
642 } else {
643 /*
644 * we assume that the transport protocol is UDP and no IPV6
645 * options are used.
646 */
647 data->mtu = sockopt_val - 8 - 40;
648 ret = data->mtu;
649 }
650 break;
651 # endif
652 default:
653 ret = 0;
654 break;
655 }
656 # else
657 ret = 0;
658 # endif
659 break;
660 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
661 ret = -dgram_get_mtu_overhead(data);
662 switch (data->peer.sa.sa_family) {
663 case AF_INET:
664 ret += 576;
665 break;
666 # if OPENSSL_USE_IPV6
667 case AF_INET6:
668 # ifdef IN6_IS_ADDR_V4MAPPED
669 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
670 ret += 576;
671 else
672 # endif
673 ret += 1280;
674 break;
675 # endif
676 default:
677 ret += 576;
678 break;
679 }
680 break;
681 case BIO_CTRL_DGRAM_GET_MTU:
682 return data->mtu;
683 break;
684 case BIO_CTRL_DGRAM_SET_MTU:
685 data->mtu = num;
686 ret = num;
687 break;
688 case BIO_CTRL_DGRAM_SET_CONNECTED:
689 to = (struct sockaddr *)ptr;
690
691 if (to != NULL) {
692 data->connected = 1;
693 switch (to->sa_family) {
694 case AF_INET:
695 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
696 break;
697 # if OPENSSL_USE_IPV6
698 case AF_INET6:
699 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
700 break;
701 # endif
702 default:
703 memcpy(&data->peer, to, sizeof(data->peer.sa));
704 break;
705 }
706 } else {
707 data->connected = 0;
708 memset(&(data->peer), 0x00, sizeof(data->peer));
709 }
710 break;
711 case BIO_CTRL_DGRAM_GET_PEER:
712 switch (data->peer.sa.sa_family) {
713 case AF_INET:
714 ret = sizeof(data->peer.sa_in);
715 break;
716 # if OPENSSL_USE_IPV6
717 case AF_INET6:
718 ret = sizeof(data->peer.sa_in6);
719 break;
720 # endif
721 default:
722 ret = sizeof(data->peer.sa);
723 break;
724 }
725 if (num == 0 || num > ret)
726 num = ret;
727 memcpy(ptr, &data->peer, (ret = num));
728 break;
729 case BIO_CTRL_DGRAM_SET_PEER:
730 to = (struct sockaddr *)ptr;
731 switch (to->sa_family) {
732 case AF_INET:
733 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
734 break;
735 # if OPENSSL_USE_IPV6
736 case AF_INET6:
737 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
738 break;
739 # endif
740 default:
741 memcpy(&data->peer, to, sizeof(data->peer.sa));
742 break;
743 }
744 break;
745 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
746 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
747 break;
748 # if defined(SO_RCVTIMEO)
749 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
750 # ifdef OPENSSL_SYS_WINDOWS
751 {
752 struct timeval *tv = (struct timeval *)ptr;
753 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
754 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
755 (void *)&timeout, sizeof(timeout)) < 0) {
756 perror("setsockopt");
757 ret = -1;
758 }
759 }
760 # else
761 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
762 sizeof(struct timeval)) < 0) {
763 perror("setsockopt");
764 ret = -1;
765 }
766 # endif
767 break;
768 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
769 {
770 union {
771 size_t s;
772 int i;
773 } sz = {
774 0
775 };
776 # ifdef OPENSSL_SYS_WINDOWS
777 int timeout;
778 struct timeval *tv = (struct timeval *)ptr;
779
780 sz.i = sizeof(timeout);
781 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
782 (void *)&timeout, &sz.i) < 0) {
783 perror("getsockopt");
784 ret = -1;
785 } else {
786 tv->tv_sec = timeout / 1000;
787 tv->tv_usec = (timeout % 1000) * 1000;
788 ret = sizeof(*tv);
789 }
790 # else
791 sz.i = sizeof(struct timeval);
792 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
793 ptr, (void *)&sz) < 0) {
794 perror("getsockopt");
795 ret = -1;
796 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
797 OPENSSL_assert(sz.s <= sizeof(struct timeval));
798 ret = (int)sz.s;
799 } else
800 ret = sz.i;
801 # endif
802 }
803 break;
804 # endif
805 # if defined(SO_SNDTIMEO)
806 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
807 # ifdef OPENSSL_SYS_WINDOWS
808 {
809 struct timeval *tv = (struct timeval *)ptr;
810 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
811 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
812 (void *)&timeout, sizeof(timeout)) < 0) {
813 perror("setsockopt");
814 ret = -1;
815 }
816 }
817 # else
818 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
819 sizeof(struct timeval)) < 0) {
820 perror("setsockopt");
821 ret = -1;
822 }
823 # endif
824 break;
825 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
826 {
827 union {
828 size_t s;
829 int i;
830 } sz = {
831 0
832 };
833 # ifdef OPENSSL_SYS_WINDOWS
834 int timeout;
835 struct timeval *tv = (struct timeval *)ptr;
836
837 sz.i = sizeof(timeout);
838 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
839 (void *)&timeout, &sz.i) < 0) {
840 perror("getsockopt");
841 ret = -1;
842 } else {
843 tv->tv_sec = timeout / 1000;
844 tv->tv_usec = (timeout % 1000) * 1000;
845 ret = sizeof(*tv);
846 }
847 # else
848 sz.i = sizeof(struct timeval);
849 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
850 ptr, (void *)&sz) < 0) {
851 perror("getsockopt");
852 ret = -1;
853 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
854 OPENSSL_assert(sz.s <= sizeof(struct timeval));
855 ret = (int)sz.s;
856 } else
857 ret = sz.i;
858 # endif
859 }
860 break;
861 # endif
862 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
863 /* fall-through */
864 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
865 # ifdef OPENSSL_SYS_WINDOWS
866 if (data->_errno == WSAETIMEDOUT)
867 # else
868 if (data->_errno == EAGAIN)
869 # endif
870 {
871 ret = 1;
872 data->_errno = 0;
873 } else
874 ret = 0;
875 break;
876 # ifdef EMSGSIZE
877 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
878 if (data->_errno == EMSGSIZE) {
879 ret = 1;
880 data->_errno = 0;
881 } else
882 ret = 0;
883 break;
884 # endif
885 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
886 ret = dgram_get_mtu_overhead(data);
887 break;
888 default:
889 ret = 0;
890 break;
891 }
892 return (ret);
893 }
894
dgram_puts(BIO * bp,const char * str)895 static int dgram_puts(BIO *bp, const char *str)
896 {
897 int n, ret;
898
899 n = strlen(str);
900 ret = dgram_write(bp, str, n);
901 return (ret);
902 }
903
904 # ifndef OPENSSL_NO_SCTP
BIO_s_datagram_sctp(void)905 BIO_METHOD *BIO_s_datagram_sctp(void)
906 {
907 return (&methods_dgramp_sctp);
908 }
909
BIO_new_dgram_sctp(int fd,int close_flag)910 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
911 {
912 BIO *bio;
913 int ret, optval = 20000;
914 int auth_data = 0, auth_forward = 0;
915 unsigned char *p;
916 struct sctp_authchunk auth;
917 struct sctp_authchunks *authchunks;
918 socklen_t sockopt_len;
919 # ifdef SCTP_AUTHENTICATION_EVENT
920 # ifdef SCTP_EVENT
921 struct sctp_event event;
922 # else
923 struct sctp_event_subscribe event;
924 # endif
925 # endif
926
927 bio = BIO_new(BIO_s_datagram_sctp());
928 if (bio == NULL)
929 return (NULL);
930 BIO_set_fd(bio, fd, close_flag);
931
932 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
933 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
934 ret =
935 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
936 sizeof(struct sctp_authchunk));
937 if (ret < 0) {
938 BIO_vfree(bio);
939 return (NULL);
940 }
941 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
942 ret =
943 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
944 sizeof(struct sctp_authchunk));
945 if (ret < 0) {
946 BIO_vfree(bio);
947 return (NULL);
948 }
949
950 /*
951 * Test if activation was successful. When using accept(), SCTP-AUTH has
952 * to be activated for the listening socket already, otherwise the
953 * connected socket won't use it.
954 */
955 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
956 authchunks = OPENSSL_malloc(sockopt_len);
957 if (!authchunks) {
958 BIO_vfree(bio);
959 return (NULL);
960 }
961 memset(authchunks, 0, sizeof(sockopt_len));
962 ret =
963 getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
964 &sockopt_len);
965
966 if (ret < 0) {
967 OPENSSL_free(authchunks);
968 BIO_vfree(bio);
969 return (NULL);
970 }
971
972 for (p = (unsigned char *)authchunks->gauth_chunks;
973 p < (unsigned char *)authchunks + sockopt_len;
974 p += sizeof(uint8_t)) {
975 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
976 auth_data = 1;
977 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
978 auth_forward = 1;
979 }
980
981 OPENSSL_free(authchunks);
982
983 OPENSSL_assert(auth_data);
984 OPENSSL_assert(auth_forward);
985
986 # ifdef SCTP_AUTHENTICATION_EVENT
987 # ifdef SCTP_EVENT
988 memset(&event, 0, sizeof(struct sctp_event));
989 event.se_assoc_id = 0;
990 event.se_type = SCTP_AUTHENTICATION_EVENT;
991 event.se_on = 1;
992 ret =
993 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
994 sizeof(struct sctp_event));
995 if (ret < 0) {
996 BIO_vfree(bio);
997 return (NULL);
998 }
999 # else
1000 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
1001 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
1002 if (ret < 0) {
1003 BIO_vfree(bio);
1004 return (NULL);
1005 }
1006
1007 event.sctp_authentication_event = 1;
1008
1009 ret =
1010 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
1011 sizeof(struct sctp_event_subscribe));
1012 if (ret < 0) {
1013 BIO_vfree(bio);
1014 return (NULL);
1015 }
1016 # endif
1017 # endif
1018
1019 /*
1020 * Disable partial delivery by setting the min size larger than the max
1021 * record size of 2^14 + 2048 + 13
1022 */
1023 ret =
1024 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
1025 sizeof(optval));
1026 if (ret < 0) {
1027 BIO_vfree(bio);
1028 return (NULL);
1029 }
1030
1031 return (bio);
1032 }
1033
BIO_dgram_is_sctp(BIO * bio)1034 int BIO_dgram_is_sctp(BIO *bio)
1035 {
1036 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
1037 }
1038
dgram_sctp_new(BIO * bi)1039 static int dgram_sctp_new(BIO *bi)
1040 {
1041 bio_dgram_sctp_data *data = NULL;
1042
1043 bi->init = 0;
1044 bi->num = 0;
1045 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
1046 if (data == NULL)
1047 return 0;
1048 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
1049 # ifdef SCTP_PR_SCTP_NONE
1050 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1051 # endif
1052 bi->ptr = data;
1053
1054 bi->flags = 0;
1055 return (1);
1056 }
1057
dgram_sctp_free(BIO * a)1058 static int dgram_sctp_free(BIO *a)
1059 {
1060 bio_dgram_sctp_data *data;
1061
1062 if (a == NULL)
1063 return (0);
1064 if (!dgram_clear(a))
1065 return 0;
1066
1067 data = (bio_dgram_sctp_data *) a->ptr;
1068 if (data != NULL) {
1069 if (data->saved_message.data != NULL)
1070 OPENSSL_free(data->saved_message.data);
1071 OPENSSL_free(data);
1072 }
1073
1074 return (1);
1075 }
1076
1077 # ifdef SCTP_AUTHENTICATION_EVENT
dgram_sctp_handle_auth_free_key_event(BIO * b,union sctp_notification * snp)1078 void dgram_sctp_handle_auth_free_key_event(BIO *b,
1079 union sctp_notification *snp)
1080 {
1081 int ret;
1082 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
1083
1084 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
1085 struct sctp_authkeyid authkeyid;
1086
1087 /* delete key */
1088 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1089 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1090 &authkeyid, sizeof(struct sctp_authkeyid));
1091 }
1092 }
1093 # endif
1094
dgram_sctp_read(BIO * b,char * out,int outl)1095 static int dgram_sctp_read(BIO *b, char *out, int outl)
1096 {
1097 int ret = 0, n = 0, i, optval;
1098 socklen_t optlen;
1099 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1100 union sctp_notification *snp;
1101 struct msghdr msg;
1102 struct iovec iov;
1103 struct cmsghdr *cmsg;
1104 char cmsgbuf[512];
1105
1106 if (out != NULL) {
1107 clear_socket_error();
1108
1109 do {
1110 memset(&data->rcvinfo, 0x00,
1111 sizeof(struct bio_dgram_sctp_rcvinfo));
1112 iov.iov_base = out;
1113 iov.iov_len = outl;
1114 msg.msg_name = NULL;
1115 msg.msg_namelen = 0;
1116 msg.msg_iov = &iov;
1117 msg.msg_iovlen = 1;
1118 msg.msg_control = cmsgbuf;
1119 msg.msg_controllen = 512;
1120 msg.msg_flags = 0;
1121 n = recvmsg(b->num, &msg, 0);
1122
1123 if (n <= 0) {
1124 if (n < 0)
1125 ret = n;
1126 break;
1127 }
1128
1129 if (msg.msg_controllen > 0) {
1130 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1131 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1132 if (cmsg->cmsg_level != IPPROTO_SCTP)
1133 continue;
1134 # ifdef SCTP_RCVINFO
1135 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1136 struct sctp_rcvinfo *rcvinfo;
1137
1138 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1139 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1140 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1141 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1142 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1143 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1144 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1145 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1146 }
1147 # endif
1148 # ifdef SCTP_SNDRCV
1149 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1150 struct sctp_sndrcvinfo *sndrcvinfo;
1151
1152 sndrcvinfo =
1153 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1154 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1155 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1156 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1157 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1158 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1159 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1160 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1161 }
1162 # endif
1163 }
1164 }
1165
1166 if (msg.msg_flags & MSG_NOTIFICATION) {
1167 snp = (union sctp_notification *)out;
1168 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1169 # ifdef SCTP_EVENT
1170 struct sctp_event event;
1171 # else
1172 struct sctp_event_subscribe event;
1173 socklen_t eventsize;
1174 # endif
1175 /*
1176 * If a message has been delayed until the socket is dry,
1177 * it can be sent now.
1178 */
1179 if (data->saved_message.length > 0) {
1180 dgram_sctp_write(data->saved_message.bio,
1181 data->saved_message.data,
1182 data->saved_message.length);
1183 OPENSSL_free(data->saved_message.data);
1184 data->saved_message.data = NULL;
1185 data->saved_message.length = 0;
1186 }
1187
1188 /* disable sender dry event */
1189 # ifdef SCTP_EVENT
1190 memset(&event, 0, sizeof(struct sctp_event));
1191 event.se_assoc_id = 0;
1192 event.se_type = SCTP_SENDER_DRY_EVENT;
1193 event.se_on = 0;
1194 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1195 sizeof(struct sctp_event));
1196 if (i < 0) {
1197 ret = i;
1198 break;
1199 }
1200 # else
1201 eventsize = sizeof(struct sctp_event_subscribe);
1202 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1203 &eventsize);
1204 if (i < 0) {
1205 ret = i;
1206 break;
1207 }
1208
1209 event.sctp_sender_dry_event = 0;
1210
1211 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1212 sizeof(struct sctp_event_subscribe));
1213 if (i < 0) {
1214 ret = i;
1215 break;
1216 }
1217 # endif
1218 }
1219 # ifdef SCTP_AUTHENTICATION_EVENT
1220 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1221 dgram_sctp_handle_auth_free_key_event(b, snp);
1222 # endif
1223
1224 if (data->handle_notifications != NULL)
1225 data->handle_notifications(b, data->notification_context,
1226 (void *)out);
1227
1228 memset(out, 0, outl);
1229 } else
1230 ret += n;
1231 }
1232 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1233 && (ret < outl));
1234
1235 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1236 /* Partial message read, this should never happen! */
1237
1238 /*
1239 * The buffer was too small, this means the peer sent a message
1240 * that was larger than allowed.
1241 */
1242 if (ret == outl)
1243 return -1;
1244
1245 /*
1246 * Test if socket buffer can handle max record size (2^14 + 2048
1247 * + 13)
1248 */
1249 optlen = (socklen_t) sizeof(int);
1250 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1251 if (ret >= 0)
1252 OPENSSL_assert(optval >= 18445);
1253
1254 /*
1255 * Test if SCTP doesn't partially deliver below max record size
1256 * (2^14 + 2048 + 13)
1257 */
1258 optlen = (socklen_t) sizeof(int);
1259 ret =
1260 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1261 &optval, &optlen);
1262 if (ret >= 0)
1263 OPENSSL_assert(optval >= 18445);
1264
1265 /*
1266 * Partially delivered notification??? Probably a bug....
1267 */
1268 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1269
1270 /*
1271 * Everything seems ok till now, so it's most likely a message
1272 * dropped by PR-SCTP.
1273 */
1274 memset(out, 0, outl);
1275 BIO_set_retry_read(b);
1276 return -1;
1277 }
1278
1279 BIO_clear_retry_flags(b);
1280 if (ret < 0) {
1281 if (BIO_dgram_should_retry(ret)) {
1282 BIO_set_retry_read(b);
1283 data->_errno = get_last_socket_error();
1284 }
1285 }
1286
1287 /* Test if peer uses SCTP-AUTH before continuing */
1288 if (!data->peer_auth_tested) {
1289 int ii, auth_data = 0, auth_forward = 0;
1290 unsigned char *p;
1291 struct sctp_authchunks *authchunks;
1292
1293 optlen =
1294 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1295 authchunks = OPENSSL_malloc(optlen);
1296 if (!authchunks) {
1297 BIOerr(BIO_F_DGRAM_SCTP_READ, ERR_R_MALLOC_FAILURE);
1298 return -1;
1299 }
1300 memset(authchunks, 0, sizeof(optlen));
1301 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1302 authchunks, &optlen);
1303
1304 if (ii >= 0)
1305 for (p = (unsigned char *)authchunks->gauth_chunks;
1306 p < (unsigned char *)authchunks + optlen;
1307 p += sizeof(uint8_t)) {
1308 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1309 auth_data = 1;
1310 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1311 auth_forward = 1;
1312 }
1313
1314 OPENSSL_free(authchunks);
1315
1316 if (!auth_data || !auth_forward) {
1317 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1318 return -1;
1319 }
1320
1321 data->peer_auth_tested = 1;
1322 }
1323 }
1324 return (ret);
1325 }
1326
dgram_sctp_write(BIO * b,const char * in,int inl)1327 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1328 {
1329 int ret;
1330 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1331 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1332 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1333 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1334 struct iovec iov[1];
1335 struct msghdr msg;
1336 struct cmsghdr *cmsg;
1337 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1338 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1339 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1340 struct sctp_sndinfo *sndinfo;
1341 struct sctp_prinfo *prinfo;
1342 # else
1343 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1344 struct sctp_sndrcvinfo *sndrcvinfo;
1345 # endif
1346
1347 clear_socket_error();
1348
1349 /*
1350 * If we're send anything else than application data, disable all user
1351 * parameters and flags.
1352 */
1353 if (in[0] != 23) {
1354 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1355 # ifdef SCTP_SACK_IMMEDIATELY
1356 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1357 # endif
1358 sinfo = &handshake_sinfo;
1359 }
1360
1361 /*
1362 * If we have to send a shutdown alert message and the socket is not dry
1363 * yet, we have to save it and send it as soon as the socket gets dry.
1364 */
1365 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b)) {
1366 char *tmp;
1367 data->saved_message.bio = b;
1368 if (!(tmp = OPENSSL_malloc(inl))) {
1369 BIOerr(BIO_F_DGRAM_SCTP_WRITE, ERR_R_MALLOC_FAILURE);
1370 return -1;
1371 }
1372 if (data->saved_message.data)
1373 OPENSSL_free(data->saved_message.data);
1374 data->saved_message.data = tmp;
1375 memcpy(data->saved_message.data, in, inl);
1376 data->saved_message.length = inl;
1377 return inl;
1378 }
1379
1380 iov[0].iov_base = (char *)in;
1381 iov[0].iov_len = inl;
1382 msg.msg_name = NULL;
1383 msg.msg_namelen = 0;
1384 msg.msg_iov = iov;
1385 msg.msg_iovlen = 1;
1386 msg.msg_control = (caddr_t) cmsgbuf;
1387 msg.msg_controllen = 0;
1388 msg.msg_flags = 0;
1389 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1390 cmsg = (struct cmsghdr *)cmsgbuf;
1391 cmsg->cmsg_level = IPPROTO_SCTP;
1392 cmsg->cmsg_type = SCTP_SNDINFO;
1393 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1394 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1395 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1396 sndinfo->snd_sid = sinfo->snd_sid;
1397 sndinfo->snd_flags = sinfo->snd_flags;
1398 sndinfo->snd_ppid = sinfo->snd_ppid;
1399 sndinfo->snd_context = sinfo->snd_context;
1400 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1401
1402 cmsg =
1403 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1404 cmsg->cmsg_level = IPPROTO_SCTP;
1405 cmsg->cmsg_type = SCTP_PRINFO;
1406 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1407 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1408 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1409 prinfo->pr_policy = pinfo->pr_policy;
1410 prinfo->pr_value = pinfo->pr_value;
1411 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1412 # else
1413 cmsg = (struct cmsghdr *)cmsgbuf;
1414 cmsg->cmsg_level = IPPROTO_SCTP;
1415 cmsg->cmsg_type = SCTP_SNDRCV;
1416 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1417 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1418 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1419 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1420 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1421 # ifdef __FreeBSD__
1422 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1423 # endif
1424 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1425 sndrcvinfo->sinfo_context = sinfo->snd_context;
1426 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1427 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1428 # endif
1429
1430 ret = sendmsg(b->num, &msg, 0);
1431
1432 BIO_clear_retry_flags(b);
1433 if (ret <= 0) {
1434 if (BIO_dgram_should_retry(ret)) {
1435 BIO_set_retry_write(b);
1436 data->_errno = get_last_socket_error();
1437 }
1438 }
1439 return (ret);
1440 }
1441
dgram_sctp_ctrl(BIO * b,int cmd,long num,void * ptr)1442 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1443 {
1444 long ret = 1;
1445 bio_dgram_sctp_data *data = NULL;
1446 socklen_t sockopt_len = 0;
1447 struct sctp_authkeyid authkeyid;
1448 struct sctp_authkey *authkey = NULL;
1449
1450 data = (bio_dgram_sctp_data *) b->ptr;
1451
1452 switch (cmd) {
1453 case BIO_CTRL_DGRAM_QUERY_MTU:
1454 /*
1455 * Set to maximum (2^14) and ignore user input to enable transport
1456 * protocol fragmentation. Returns always 2^14.
1457 */
1458 data->mtu = 16384;
1459 ret = data->mtu;
1460 break;
1461 case BIO_CTRL_DGRAM_SET_MTU:
1462 /*
1463 * Set to maximum (2^14) and ignore input to enable transport
1464 * protocol fragmentation. Returns always 2^14.
1465 */
1466 data->mtu = 16384;
1467 ret = data->mtu;
1468 break;
1469 case BIO_CTRL_DGRAM_SET_CONNECTED:
1470 case BIO_CTRL_DGRAM_CONNECT:
1471 /* Returns always -1. */
1472 ret = -1;
1473 break;
1474 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1475 /*
1476 * SCTP doesn't need the DTLS timer Returns always 1.
1477 */
1478 break;
1479 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1480 /*
1481 * We allow transport protocol fragmentation so this is irrelevant
1482 */
1483 ret = 0;
1484 break;
1485 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1486 if (num > 0)
1487 data->in_handshake = 1;
1488 else
1489 data->in_handshake = 0;
1490
1491 ret =
1492 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1493 &data->in_handshake, sizeof(int));
1494 break;
1495 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1496 /*
1497 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1498 */
1499
1500 /* Get active key */
1501 sockopt_len = sizeof(struct sctp_authkeyid);
1502 ret =
1503 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1504 &sockopt_len);
1505 if (ret < 0)
1506 break;
1507
1508 /* Add new key */
1509 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1510 authkey = OPENSSL_malloc(sockopt_len);
1511 if (authkey == NULL) {
1512 ret = -1;
1513 break;
1514 }
1515 memset(authkey, 0x00, sockopt_len);
1516 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1517 # ifndef __FreeBSD__
1518 /*
1519 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1520 * and higher work without it.
1521 */
1522 authkey->sca_keylength = 64;
1523 # endif
1524 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1525
1526 ret =
1527 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1528 sockopt_len);
1529 OPENSSL_free(authkey);
1530 authkey = NULL;
1531 if (ret < 0)
1532 break;
1533
1534 /* Reset active key */
1535 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1536 &authkeyid, sizeof(struct sctp_authkeyid));
1537 if (ret < 0)
1538 break;
1539
1540 break;
1541 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1542 /* Returns 0 on success, -1 otherwise. */
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 /* Set active key */
1553 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1554 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1555 &authkeyid, sizeof(struct sctp_authkeyid));
1556 if (ret < 0)
1557 break;
1558
1559 /*
1560 * CCS has been sent, so remember that and fall through to check if
1561 * we need to deactivate an old key
1562 */
1563 data->ccs_sent = 1;
1564
1565 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1566 /* Returns 0 on success, -1 otherwise. */
1567
1568 /*
1569 * Has this command really been called or is this just a
1570 * fall-through?
1571 */
1572 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1573 data->ccs_rcvd = 1;
1574
1575 /*
1576 * CSS has been both, received and sent, so deactivate an old key
1577 */
1578 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1579 /* Get active key */
1580 sockopt_len = sizeof(struct sctp_authkeyid);
1581 ret =
1582 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1583 &authkeyid, &sockopt_len);
1584 if (ret < 0)
1585 break;
1586
1587 /*
1588 * Deactivate key or delete second last key if
1589 * SCTP_AUTHENTICATION_EVENT is not available.
1590 */
1591 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1592 # ifdef SCTP_AUTH_DEACTIVATE_KEY
1593 sockopt_len = sizeof(struct sctp_authkeyid);
1594 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1595 &authkeyid, sockopt_len);
1596 if (ret < 0)
1597 break;
1598 # endif
1599 # ifndef SCTP_AUTHENTICATION_EVENT
1600 if (authkeyid.scact_keynumber > 0) {
1601 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1602 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1603 &authkeyid, sizeof(struct sctp_authkeyid));
1604 if (ret < 0)
1605 break;
1606 }
1607 # endif
1608
1609 data->ccs_rcvd = 0;
1610 data->ccs_sent = 0;
1611 }
1612 break;
1613 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1614 /* Returns the size of the copied struct. */
1615 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1616 num = sizeof(struct bio_dgram_sctp_sndinfo);
1617
1618 memcpy(ptr, &(data->sndinfo), num);
1619 ret = num;
1620 break;
1621 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1622 /* Returns the size of the copied struct. */
1623 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1624 num = sizeof(struct bio_dgram_sctp_sndinfo);
1625
1626 memcpy(&(data->sndinfo), ptr, num);
1627 break;
1628 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1629 /* Returns the size of the copied struct. */
1630 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1631 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1632
1633 memcpy(ptr, &data->rcvinfo, num);
1634
1635 ret = num;
1636 break;
1637 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1638 /* Returns the size of the copied struct. */
1639 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1640 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1641
1642 memcpy(&(data->rcvinfo), ptr, num);
1643 break;
1644 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1645 /* Returns the size of the copied struct. */
1646 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1647 num = sizeof(struct bio_dgram_sctp_prinfo);
1648
1649 memcpy(ptr, &(data->prinfo), num);
1650 ret = num;
1651 break;
1652 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1653 /* Returns the size of the copied struct. */
1654 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1655 num = sizeof(struct bio_dgram_sctp_prinfo);
1656
1657 memcpy(&(data->prinfo), ptr, num);
1658 break;
1659 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1660 /* Returns always 1. */
1661 if (num > 0)
1662 data->save_shutdown = 1;
1663 else
1664 data->save_shutdown = 0;
1665 break;
1666
1667 default:
1668 /*
1669 * Pass to default ctrl function to process SCTP unspecific commands
1670 */
1671 ret = dgram_ctrl(b, cmd, num, ptr);
1672 break;
1673 }
1674 return (ret);
1675 }
1676
BIO_dgram_sctp_notification_cb(BIO * b,void (* handle_notifications)(BIO * bio,void * context,void * buf),void * context)1677 int BIO_dgram_sctp_notification_cb(BIO *b,
1678 void (*handle_notifications) (BIO *bio,
1679 void
1680 *context,
1681 void *buf),
1682 void *context)
1683 {
1684 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1685
1686 if (handle_notifications != NULL) {
1687 data->handle_notifications = handle_notifications;
1688 data->notification_context = context;
1689 } else
1690 return -1;
1691
1692 return 0;
1693 }
1694
BIO_dgram_sctp_wait_for_dry(BIO * b)1695 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1696 {
1697 int is_dry = 0;
1698 int n, sockflags, ret;
1699 union sctp_notification snp;
1700 struct msghdr msg;
1701 struct iovec iov;
1702 # ifdef SCTP_EVENT
1703 struct sctp_event event;
1704 # else
1705 struct sctp_event_subscribe event;
1706 socklen_t eventsize;
1707 # endif
1708 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1709
1710 /* set sender dry event */
1711 # ifdef SCTP_EVENT
1712 memset(&event, 0, sizeof(struct sctp_event));
1713 event.se_assoc_id = 0;
1714 event.se_type = SCTP_SENDER_DRY_EVENT;
1715 event.se_on = 1;
1716 ret =
1717 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1718 sizeof(struct sctp_event));
1719 # else
1720 eventsize = sizeof(struct sctp_event_subscribe);
1721 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1722 if (ret < 0)
1723 return -1;
1724
1725 event.sctp_sender_dry_event = 1;
1726
1727 ret =
1728 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1729 sizeof(struct sctp_event_subscribe));
1730 # endif
1731 if (ret < 0)
1732 return -1;
1733
1734 /* peek for notification */
1735 memset(&snp, 0x00, sizeof(union sctp_notification));
1736 iov.iov_base = (char *)&snp;
1737 iov.iov_len = sizeof(union sctp_notification);
1738 msg.msg_name = NULL;
1739 msg.msg_namelen = 0;
1740 msg.msg_iov = &iov;
1741 msg.msg_iovlen = 1;
1742 msg.msg_control = NULL;
1743 msg.msg_controllen = 0;
1744 msg.msg_flags = 0;
1745
1746 n = recvmsg(b->num, &msg, MSG_PEEK);
1747 if (n <= 0) {
1748 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1749 && (get_last_socket_error() != EWOULDBLOCK))
1750 return -1;
1751 else
1752 return 0;
1753 }
1754
1755 /* if we find a notification, process it and try again if necessary */
1756 while (msg.msg_flags & MSG_NOTIFICATION) {
1757 memset(&snp, 0x00, sizeof(union sctp_notification));
1758 iov.iov_base = (char *)&snp;
1759 iov.iov_len = sizeof(union sctp_notification);
1760 msg.msg_name = NULL;
1761 msg.msg_namelen = 0;
1762 msg.msg_iov = &iov;
1763 msg.msg_iovlen = 1;
1764 msg.msg_control = NULL;
1765 msg.msg_controllen = 0;
1766 msg.msg_flags = 0;
1767
1768 n = recvmsg(b->num, &msg, 0);
1769 if (n <= 0) {
1770 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1771 && (get_last_socket_error() != EWOULDBLOCK))
1772 return -1;
1773 else
1774 return is_dry;
1775 }
1776
1777 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1778 is_dry = 1;
1779
1780 /* disable sender dry event */
1781 # ifdef SCTP_EVENT
1782 memset(&event, 0, sizeof(struct sctp_event));
1783 event.se_assoc_id = 0;
1784 event.se_type = SCTP_SENDER_DRY_EVENT;
1785 event.se_on = 0;
1786 ret =
1787 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1788 sizeof(struct sctp_event));
1789 # else
1790 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1791 ret =
1792 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1793 &eventsize);
1794 if (ret < 0)
1795 return -1;
1796
1797 event.sctp_sender_dry_event = 0;
1798
1799 ret =
1800 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1801 sizeof(struct sctp_event_subscribe));
1802 # endif
1803 if (ret < 0)
1804 return -1;
1805 }
1806 # ifdef SCTP_AUTHENTICATION_EVENT
1807 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1808 dgram_sctp_handle_auth_free_key_event(b, &snp);
1809 # endif
1810
1811 if (data->handle_notifications != NULL)
1812 data->handle_notifications(b, data->notification_context,
1813 (void *)&snp);
1814
1815 /* found notification, peek again */
1816 memset(&snp, 0x00, sizeof(union sctp_notification));
1817 iov.iov_base = (char *)&snp;
1818 iov.iov_len = sizeof(union sctp_notification);
1819 msg.msg_name = NULL;
1820 msg.msg_namelen = 0;
1821 msg.msg_iov = &iov;
1822 msg.msg_iovlen = 1;
1823 msg.msg_control = NULL;
1824 msg.msg_controllen = 0;
1825 msg.msg_flags = 0;
1826
1827 /* if we have seen the dry already, don't wait */
1828 if (is_dry) {
1829 sockflags = fcntl(b->num, F_GETFL, 0);
1830 fcntl(b->num, F_SETFL, O_NONBLOCK);
1831 }
1832
1833 n = recvmsg(b->num, &msg, MSG_PEEK);
1834
1835 if (is_dry) {
1836 fcntl(b->num, F_SETFL, sockflags);
1837 }
1838
1839 if (n <= 0) {
1840 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1841 && (get_last_socket_error() != EWOULDBLOCK))
1842 return -1;
1843 else
1844 return is_dry;
1845 }
1846 }
1847
1848 /* read anything else */
1849 return is_dry;
1850 }
1851
BIO_dgram_sctp_msg_waiting(BIO * b)1852 int BIO_dgram_sctp_msg_waiting(BIO *b)
1853 {
1854 int n, sockflags;
1855 union sctp_notification snp;
1856 struct msghdr msg;
1857 struct iovec iov;
1858 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1859
1860 /* Check if there are any messages waiting to be read */
1861 do {
1862 memset(&snp, 0x00, sizeof(union sctp_notification));
1863 iov.iov_base = (char *)&snp;
1864 iov.iov_len = sizeof(union sctp_notification);
1865 msg.msg_name = NULL;
1866 msg.msg_namelen = 0;
1867 msg.msg_iov = &iov;
1868 msg.msg_iovlen = 1;
1869 msg.msg_control = NULL;
1870 msg.msg_controllen = 0;
1871 msg.msg_flags = 0;
1872
1873 sockflags = fcntl(b->num, F_GETFL, 0);
1874 fcntl(b->num, F_SETFL, O_NONBLOCK);
1875 n = recvmsg(b->num, &msg, MSG_PEEK);
1876 fcntl(b->num, F_SETFL, sockflags);
1877
1878 /* if notification, process and try again */
1879 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1880 # ifdef SCTP_AUTHENTICATION_EVENT
1881 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1882 dgram_sctp_handle_auth_free_key_event(b, &snp);
1883 # endif
1884
1885 memset(&snp, 0x00, sizeof(union sctp_notification));
1886 iov.iov_base = (char *)&snp;
1887 iov.iov_len = sizeof(union sctp_notification);
1888 msg.msg_name = NULL;
1889 msg.msg_namelen = 0;
1890 msg.msg_iov = &iov;
1891 msg.msg_iovlen = 1;
1892 msg.msg_control = NULL;
1893 msg.msg_controllen = 0;
1894 msg.msg_flags = 0;
1895 n = recvmsg(b->num, &msg, 0);
1896
1897 if (data->handle_notifications != NULL)
1898 data->handle_notifications(b, data->notification_context,
1899 (void *)&snp);
1900 }
1901
1902 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1903
1904 /* Return 1 if there is a message to be read, return 0 otherwise. */
1905 if (n > 0)
1906 return 1;
1907 else
1908 return 0;
1909 }
1910
dgram_sctp_puts(BIO * bp,const char * str)1911 static int dgram_sctp_puts(BIO *bp, const char *str)
1912 {
1913 int n, ret;
1914
1915 n = strlen(str);
1916 ret = dgram_sctp_write(bp, str, n);
1917 return (ret);
1918 }
1919 # endif
1920
BIO_dgram_should_retry(int i)1921 static int BIO_dgram_should_retry(int i)
1922 {
1923 int err;
1924
1925 if ((i == 0) || (i == -1)) {
1926 err = get_last_socket_error();
1927
1928 # if defined(OPENSSL_SYS_WINDOWS)
1929 /*
1930 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1931 * this point, the error code was overwritten by another system call
1932 * before this error handling is called.
1933 */
1934 # endif
1935
1936 return (BIO_dgram_non_fatal_error(err));
1937 }
1938 return (0);
1939 }
1940
BIO_dgram_non_fatal_error(int err)1941 int BIO_dgram_non_fatal_error(int err)
1942 {
1943 switch (err) {
1944 # if defined(OPENSSL_SYS_WINDOWS)
1945 # if defined(WSAEWOULDBLOCK)
1946 case WSAEWOULDBLOCK:
1947 # endif
1948
1949 # if 0 /* This appears to always be an error */
1950 # if defined(WSAENOTCONN)
1951 case WSAENOTCONN:
1952 # endif
1953 # endif
1954 # endif
1955
1956 # ifdef EWOULDBLOCK
1957 # ifdef WSAEWOULDBLOCK
1958 # if WSAEWOULDBLOCK != EWOULDBLOCK
1959 case EWOULDBLOCK:
1960 # endif
1961 # else
1962 case EWOULDBLOCK:
1963 # endif
1964 # endif
1965
1966 # ifdef EINTR
1967 case EINTR:
1968 # endif
1969
1970 # ifdef EAGAIN
1971 # if EWOULDBLOCK != EAGAIN
1972 case EAGAIN:
1973 # endif
1974 # endif
1975
1976 # ifdef EPROTO
1977 case EPROTO:
1978 # endif
1979
1980 # ifdef EINPROGRESS
1981 case EINPROGRESS:
1982 # endif
1983
1984 # ifdef EALREADY
1985 case EALREADY:
1986 # endif
1987
1988 return (1);
1989 /* break; */
1990 default:
1991 break;
1992 }
1993 return (0);
1994 }
1995
get_current_time(struct timeval * t)1996 static void get_current_time(struct timeval *t)
1997 {
1998 # ifdef OPENSSL_SYS_WIN32
1999 struct _timeb tb;
2000 _ftime(&tb);
2001 t->tv_sec = (long)tb.time;
2002 t->tv_usec = (long)tb.millitm * 1000;
2003 # elif defined(OPENSSL_SYS_VMS)
2004 struct timeb tb;
2005 ftime(&tb);
2006 t->tv_sec = (long)tb.time;
2007 t->tv_usec = (long)tb.millitm * 1000;
2008 # else
2009 gettimeofday(t, NULL);
2010 # endif
2011 }
2012
2013 #endif
2014