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Check BIO_dgram_sctp_wait_for_dry() return value for error
[thirdparty/openssl.git] / crypto / bio / bss_dgram.c
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36d16f8e 1/* crypto/bio/bio_dgram.c */
0f113f3e 2/*
36d16f8e 3 * DTLS implementation written by Nagendra Modadugu
0f113f3e 4 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
36d16f8e
BL		 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
0f113f3e 14 * notice, this list of conditions and the following disclaimer.
36d16f8e
BL		 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
36d16f8e
BL		 60#include <stdio.h>
61#include <errno.h>
62#define USE_SOCKETS
b39fc560 63#include "internal/cryptlib.h"
36d16f8e 64
36d16f8e 65#include <openssl/bio.h>
74e056ed 66#ifndef OPENSSL_NO_DGRAM
36d16f8e 67
0f113f3e
MC		 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
e5fa864f 74
0f113f3e
MC		 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
7e159e01 81
0f113f3e
MC		 82# if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
83# define IP_MTU 14 /* linux is lame */
84# endif
36d16f8e 85
0f113f3e
MC		 86# if OPENSSL_USE_IPV6 && !defined(IPPROTO_IPV6)
87# define IPPROTO_IPV6 41 /* windows is lame */
88# endif
5833e4f5 89
0f113f3e 90# if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
03c1d9f9 91/* Standard definition causes type-punning problems. */
0f113f3e
MC		 92# undef IN6_IS_ADDR_V4MAPPED
93# define s6_addr32 __u6_addr.__u6_addr32
94# define IN6_IS_ADDR_V4MAPPED(a) \
03c1d9f9
BL		 95 (((a)->s6_addr32[0] == 0) && \
96 ((a)->s6_addr32[1] == 0) && \
97 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
0f113f3e 98# endif
03c1d9f9 99
0f113f3e
MC		 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
f642ebc1 105
36d16f8e
BL		 106static int dgram_write(BIO *h, const char *buf, int num);
107static int dgram_read(BIO *h, char *buf, int size);
108static int dgram_puts(BIO *h, const char *str);
109static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
110static int dgram_new(BIO *h);
111static int dgram_free(BIO *data);
112static int dgram_clear(BIO *bio);
113
0f113f3e 114# ifndef OPENSSL_NO_SCTP
7e159e01
DSH		 115static int dgram_sctp_write(BIO *h, const char *buf, int num);
116static int dgram_sctp_read(BIO *h, char *buf, int size);
117static int dgram_sctp_puts(BIO *h, const char *str);
118static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
119static int dgram_sctp_new(BIO *h);
120static int dgram_sctp_free(BIO *data);
0f113f3e
MC		 121# ifdef SCTP_AUTHENTICATION_EVENT
122static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification
123 *snp);
124# endif
125# endif
7e159e01 126
b3e72fc3 127static int BIO_dgram_should_retry(int s);
36d16f8e 128
5d6a0179
RL		 129static void get_current_time(struct timeval *t);
130
0f113f3e
MC		 131static 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
145static 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
7e159e01 158
0f113f3e
MC		 159typedef 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
175typedef struct bio_dgram_sctp_save_message_st {
176 BIO *bio;
177 char *data;
178 int length;
179} bio_dgram_sctp_save_message;
180
181typedef 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
7e159e01 205
36d16f8e 206BIO_METHOD *BIO_s_datagram(void)
0f113f3e
MC		 207{
208 return (&methods_dgramp);
209}
36d16f8e
BL		 210
211BIO *BIO_new_dgram(int fd, int close_flag)
0f113f3e
MC		 212{
213 BIO *ret;
36d16f8e 214
0f113f3e
MC		 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}
36d16f8e
BL		 221
222static int dgram_new(BIO *bi)
0f113f3e
MC		 223{
224 bio_dgram_data *data = NULL;
225
226 bi->init = 0;
227 bi->num = 0;
b4faea50 228 data = OPENSSL_malloc(sizeof(*data));
0f113f3e
MC		 229 if (data == NULL)
230 return 0;
16f8d4eb 231 memset(data, 0, sizeof(*data));
36d16f8e
BL		 232 bi->ptr = data;
233
0f113f3e
MC		 234 bi->flags = 0;
235 return (1);
236}
36d16f8e
BL		 237
238static int dgram_free(BIO *a)
0f113f3e
MC		 239{
240 bio_dgram_data *data;
36d16f8e 241
0f113f3e
MC		 242 if (a == NULL)
243 return (0);
244 if (!dgram_clear(a))
245 return 0;
36d16f8e 246
0f113f3e 247 data = (bio_dgram_data *)a->ptr;
b548a1f1 248 OPENSSL_free(data);
36d16f8e 249
0f113f3e
MC		 250 return (1);
251}
36d16f8e
BL		 252
253static int dgram_clear(BIO *a)
0f113f3e
MC		 254{
255 if (a == NULL)
256 return (0);
257 if (a->shutdown) {
258 if (a->init) {
259 SHUTDOWN2(a->num);
260 }
261 a->init = 0;
262 a->flags = 0;
263 }
264 return (1);
265}
eb38b26d
DSH		 266
267static void dgram_adjust_rcv_timeout(BIO *b)
0f113f3e
MC		 268{
269# if defined(SO_RCVTIMEO)
270 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
271 union {
272 size_t s;
273 int i;
274 } sz = {
275 0
276 };
277
278 /* Is a timer active? */
279 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
280 struct timeval timenow, timeleft;
281
282 /* Read current socket timeout */
283# ifdef OPENSSL_SYS_WINDOWS
284 int timeout;
285
286 sz.i = sizeof(timeout);
287 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
288 (void *)&timeout, &sz.i) < 0) {
289 perror("getsockopt");
290 } else {
291 data->socket_timeout.tv_sec = timeout / 1000;
292 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
293 }
294# else
295 sz.i = sizeof(data->socket_timeout);
296 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
297 &(data->socket_timeout), (void *)&sz) < 0) {
298 perror("getsockopt");
299 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0)
300 OPENSSL_assert(sz.s <= sizeof(data->socket_timeout));
301# endif
eb38b26d 302
0f113f3e
MC		 303 /* Get current time */
304 get_current_time(&timenow);
305
306 /* Calculate time left until timer expires */
307 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
fc52ac90
MC		 308 if (timeleft.tv_usec < timenow.tv_usec) {
309 timeleft.tv_usec = 1000000 - timenow.tv_usec + timeleft.tv_usec;
0f113f3e 310 timeleft.tv_sec--;
fc52ac90
MC		 311 } else {
312 timeleft.tv_usec -= timenow.tv_usec;
0f113f3e 313 }
fc52ac90 314 if (timeleft.tv_sec < timenow.tv_sec) {
0f113f3e
MC		 315 timeleft.tv_sec = 0;
316 timeleft.tv_usec = 1;
fc52ac90
MC		 317 } else {
318 timeleft.tv_sec -= timenow.tv_sec;
0f113f3e
MC		 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}
eb38b26d
DSH		 346
347static void dgram_reset_rcv_timeout(BIO *b)
0f113f3e
MC		 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}
eb38b26d 371
36d16f8e 372static int dgram_read(BIO *b, char *out, int outl)
0f113f3e
MC		 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();
16f8d4eb 399 memset(&sa.peer, 0, sizeof(sa.peer));
0f113f3e
MC		 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}
36d16f8e
BL		 422
423static int dgram_write(BIO *b, const char *in, int inl)
0f113f3e
MC		 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();
0f113f3e
MC		 452 }
453 }
454 return (ret);
455}
36d16f8e 456
0d3ae34d 457static long dgram_get_mtu_overhead(bio_dgram_data *data)
0f113f3e
MC		 458{
459 long ret;
460
461 switch (data->peer.sa.sa_family) {
462 case AF_INET:
463 /*
464 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
465 */
466 ret = 28;
467 break;
468# if OPENSSL_USE_IPV6
469 case AF_INET6:
470# ifdef IN6_IS_ADDR_V4MAPPED
471 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
472 /*
473 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
474 */
475 ret = 28;
476 else
477# endif
478 /*
479 * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
480 */
481 ret = 48;
482 break;
483# endif
484 default:
485 /* We don't know. Go with the historical default */
486 ret = 28;
487 break;
488 }
489 return ret;
490}
0d3ae34d 491
36d16f8e 492static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
0f113f3e
MC		 493{
494 long ret = 1;
495 int *ip;
496 struct sockaddr *to = NULL;
497 bio_dgram_data *data = NULL;
498 int sockopt_val = 0;
499# if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
500 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
501 * modern enough to define socklen_t */
502 socklen_t addr_len;
503 union {
504 struct sockaddr sa;
505 struct sockaddr_in s4;
506# if OPENSSL_USE_IPV6
507 struct sockaddr_in6 s6;
508# endif
509 } addr;
510# endif
36d16f8e 511
0f113f3e
MC		 512 data = (bio_dgram_data *)b->ptr;
513
514 switch (cmd) {
515 case BIO_CTRL_RESET:
516 num = 0;
517 case BIO_C_FILE_SEEK:
518 ret = 0;
519 break;
520 case BIO_C_FILE_TELL:
521 case BIO_CTRL_INFO:
522 ret = 0;
523 break;
524 case BIO_C_SET_FD:
525 dgram_clear(b);
526 b->num = *((int *)ptr);
527 b->shutdown = (int)num;
528 b->init = 1;
529 break;
530 case BIO_C_GET_FD:
531 if (b->init) {
532 ip = (int *)ptr;
533 if (ip != NULL)
534 *ip = b->num;
535 ret = b->num;
536 } else
537 ret = -1;
538 break;
539 case BIO_CTRL_GET_CLOSE:
540 ret = b->shutdown;
541 break;
542 case BIO_CTRL_SET_CLOSE:
543 b->shutdown = (int)num;
544 break;
545 case BIO_CTRL_PENDING:
546 case BIO_CTRL_WPENDING:
547 ret = 0;
548 break;
549 case BIO_CTRL_DUP:
550 case BIO_CTRL_FLUSH:
551 ret = 1;
552 break;
553 case BIO_CTRL_DGRAM_CONNECT:
554 to = (struct sockaddr *)ptr;
4d428cd2
RS		 555 switch (to->sa_family) {
556 case AF_INET:
557 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
558 break;
0f113f3e 559# if OPENSSL_USE_IPV6
4d428cd2
RS		 560 case AF_INET6:
561 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
562 break;
0f113f3e 563# endif
4d428cd2
RS		 564 default:
565 memcpy(&data->peer, to, sizeof(data->peer.sa));
566 break;
0f113f3e 567 }
0f113f3e
MC		 568 break;
569 /* (Linux)kernel sets DF bit on outgoing IP packets */
570 case BIO_CTRL_DGRAM_MTU_DISCOVER:
571# if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
572 addr_len = (socklen_t) sizeof(addr);
16f8d4eb 573 memset(&addr, 0, sizeof(addr));
0f113f3e
MC		 574 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
575 ret = 0;
576 break;
577 }
578 switch (addr.sa.sa_family) {
579 case AF_INET:
580 sockopt_val = IP_PMTUDISC_DO;
581 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
582 &sockopt_val, sizeof(sockopt_val))) < 0)
583 perror("setsockopt");
584 break;
585# if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
586 case AF_INET6:
587 sockopt_val = IPV6_PMTUDISC_DO;
588 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
589 &sockopt_val, sizeof(sockopt_val))) < 0)
590 perror("setsockopt");
591 break;
592# endif
593 default:
594 ret = -1;
595 break;
596 }
597# else
598 ret = -1;
599# endif
600 break;
601 case BIO_CTRL_DGRAM_QUERY_MTU:
602# if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
603 addr_len = (socklen_t) sizeof(addr);
16f8d4eb 604 memset(&addr, 0, sizeof(addr));
0f113f3e
MC		 605 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
606 ret = 0;
607 break;
608 }
609 sockopt_len = sizeof(sockopt_val);
610 switch (addr.sa.sa_family) {
611 case AF_INET:
612 if ((ret =
613 getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
614 &sockopt_len)) < 0 || sockopt_val < 0) {
615 ret = 0;
616 } else {
617 /*
618 * we assume that the transport protocol is UDP and no IP
619 * options are used.
620 */
621 data->mtu = sockopt_val - 8 - 20;
622 ret = data->mtu;
623 }
624 break;
625# if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
626 case AF_INET6:
627 if ((ret =
628 getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
629 (void *)&sockopt_val, &sockopt_len)) < 0
630 || sockopt_val < 0) {
631 ret = 0;
632 } else {
633 /*
634 * we assume that the transport protocol is UDP and no IPV6
635 * options are used.
636 */
637 data->mtu = sockopt_val - 8 - 40;
638 ret = data->mtu;
639 }
640 break;
641# endif
642 default:
643 ret = 0;
644 break;
645 }
646# else
647 ret = 0;
648# endif
649 break;
650 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
651 ret = -dgram_get_mtu_overhead(data);
652 switch (data->peer.sa.sa_family) {
653 case AF_INET:
654 ret += 576;
655 break;
656# if OPENSSL_USE_IPV6
657 case AF_INET6:
658# ifdef IN6_IS_ADDR_V4MAPPED
659 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
660 ret += 576;
661 else
662# endif
663 ret += 1280;
664 break;
665# endif
666 default:
667 ret += 576;
668 break;
669 }
670 break;
671 case BIO_CTRL_DGRAM_GET_MTU:
672 return data->mtu;
0f113f3e
MC		 673 case BIO_CTRL_DGRAM_SET_MTU:
674 data->mtu = num;
675 ret = num;
676 break;
677 case BIO_CTRL_DGRAM_SET_CONNECTED:
678 to = (struct sockaddr *)ptr;
679
680 if (to != NULL) {
681 data->connected = 1;
682 switch (to->sa_family) {
683 case AF_INET:
684 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
685 break;
686# if OPENSSL_USE_IPV6
687 case AF_INET6:
688 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
689 break;
690# endif
691 default:
692 memcpy(&data->peer, to, sizeof(data->peer.sa));
693 break;
694 }
695 } else {
696 data->connected = 0;
16f8d4eb 697 memset(&data->peer, 0, sizeof(data->peer));
0f113f3e
MC		 698 }
699 break;
700 case BIO_CTRL_DGRAM_GET_PEER:
701 switch (data->peer.sa.sa_family) {
702 case AF_INET:
703 ret = sizeof(data->peer.sa_in);
704 break;
705# if OPENSSL_USE_IPV6
706 case AF_INET6:
707 ret = sizeof(data->peer.sa_in6);
708 break;
709# endif
710 default:
711 ret = sizeof(data->peer.sa);
712 break;
713 }
714 if (num == 0 || num > ret)
715 num = ret;
716 memcpy(ptr, &data->peer, (ret = num));
717 break;
718 case BIO_CTRL_DGRAM_SET_PEER:
719 to = (struct sockaddr *)ptr;
720 switch (to->sa_family) {
721 case AF_INET:
722 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
723 break;
724# if OPENSSL_USE_IPV6
725 case AF_INET6:
726 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
727 break;
728# endif
729 default:
730 memcpy(&data->peer, to, sizeof(data->peer.sa));
731 break;
732 }
733 break;
734 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
735 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
736 break;
737# if defined(SO_RCVTIMEO)
738 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
739# ifdef OPENSSL_SYS_WINDOWS
740 {
741 struct timeval *tv = (struct timeval *)ptr;
742 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
743 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
744 (void *)&timeout, sizeof(timeout)) < 0) {
745 perror("setsockopt");
746 ret = -1;
747 }
748 }
749# else
750 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
751 sizeof(struct timeval)) < 0) {
752 perror("setsockopt");
753 ret = -1;
754 }
755# endif
756 break;
757 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
758 {
759 union {
760 size_t s;
761 int i;
762 } sz = {
763 0
764 };
765# ifdef OPENSSL_SYS_WINDOWS
766 int timeout;
767 struct timeval *tv = (struct timeval *)ptr;
768
769 sz.i = sizeof(timeout);
770 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
771 (void *)&timeout, &sz.i) < 0) {
772 perror("getsockopt");
773 ret = -1;
774 } else {
775 tv->tv_sec = timeout / 1000;
776 tv->tv_usec = (timeout % 1000) * 1000;
777 ret = sizeof(*tv);
778 }
779# else
780 sz.i = sizeof(struct timeval);
781 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
782 ptr, (void *)&sz) < 0) {
783 perror("getsockopt");
784 ret = -1;
785 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
786 OPENSSL_assert(sz.s <= sizeof(struct timeval));
787 ret = (int)sz.s;
788 } else
789 ret = sz.i;
790# endif
791 }
792 break;
793# endif
794# if defined(SO_SNDTIMEO)
795 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
796# ifdef OPENSSL_SYS_WINDOWS
797 {
798 struct timeval *tv = (struct timeval *)ptr;
799 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
800 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
801 (void *)&timeout, sizeof(timeout)) < 0) {
802 perror("setsockopt");
803 ret = -1;
804 }
805 }
806# else
807 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
808 sizeof(struct timeval)) < 0) {
809 perror("setsockopt");
810 ret = -1;
811 }
812# endif
813 break;
814 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
815 {
816 union {
817 size_t s;
818 int i;
819 } sz = {
820 0
821 };
822# ifdef OPENSSL_SYS_WINDOWS
823 int timeout;
824 struct timeval *tv = (struct timeval *)ptr;
825
826 sz.i = sizeof(timeout);
827 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
828 (void *)&timeout, &sz.i) < 0) {
829 perror("getsockopt");
830 ret = -1;
831 } else {
832 tv->tv_sec = timeout / 1000;
833 tv->tv_usec = (timeout % 1000) * 1000;
834 ret = sizeof(*tv);
835 }
836# else
837 sz.i = sizeof(struct timeval);
838 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
839 ptr, (void *)&sz) < 0) {
840 perror("getsockopt");
841 ret = -1;
842 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
843 OPENSSL_assert(sz.s <= sizeof(struct timeval));
844 ret = (int)sz.s;
845 } else
846 ret = sz.i;
847# endif
848 }
849 break;
850# endif
851 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
852 /* fall-through */
853 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
854# ifdef OPENSSL_SYS_WINDOWS
855 if (data->_errno == WSAETIMEDOUT)
856# else
857 if (data->_errno == EAGAIN)
858# endif
859 {
860 ret = 1;
861 data->_errno = 0;
862 } else
863 ret = 0;
864 break;
865# ifdef EMSGSIZE
866 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
867 if (data->_errno == EMSGSIZE) {
868 ret = 1;
869 data->_errno = 0;
870 } else
871 ret = 0;
872 break;
873# endif
874 case BIO_CTRL_DGRAM_SET_DONT_FRAG:
875 sockopt_val = num ? 1 : 0;
876
877 switch (data->peer.sa.sa_family) {
878 case AF_INET:
879# if defined(IP_DONTFRAG)
880 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG,
881 &sockopt_val, sizeof(sockopt_val))) < 0) {
882 perror("setsockopt");
883 ret = -1;
884 }
133dce44 885# elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined (IP_PMTUDISC_PROBE)
0f113f3e
MC		 886 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
887 (ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
888 &sockopt_val, sizeof(sockopt_val))) < 0) {
889 perror("setsockopt");
890 ret = -1;
891 }
892# elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT)
893 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT,
894 (const char *)&sockopt_val,
895 sizeof(sockopt_val))) < 0) {
896 perror("setsockopt");
897 ret = -1;
898 }
899# else
900 ret = -1;
901# endif
902 break;
903# if OPENSSL_USE_IPV6
904 case AF_INET6:
905# if defined(IPV6_DONTFRAG)
906 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
907 (const void *)&sockopt_val,
908 sizeof(sockopt_val))) < 0) {
909 perror("setsockopt");
910 ret = -1;
911 }
912# elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER)
913 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
914 (ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
915 &sockopt_val, sizeof(sockopt_val))) < 0) {
916 perror("setsockopt");
917 ret = -1;
918 }
919# else
920 ret = -1;
921# endif
922 break;
923# endif
924 default:
925 ret = -1;
926 break;
927 }
928 break;
929 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
930 ret = dgram_get_mtu_overhead(data);
931 break;
932 default:
933 ret = 0;
934 break;
935 }
936 return (ret);
937}
36d16f8e
BL		 938
939static int dgram_puts(BIO *bp, const char *str)
0f113f3e
MC		 940{
941 int n, ret;
36d16f8e 942
0f113f3e
MC		 943 n = strlen(str);
944 ret = dgram_write(bp, str, n);
945 return (ret);
946}
36d16f8e 947
0f113f3e 948# ifndef OPENSSL_NO_SCTP
7e159e01 949BIO_METHOD *BIO_s_datagram_sctp(void)
0f113f3e
MC		 950{
951 return (&methods_dgramp_sctp);
952}
7e159e01
DSH		 953
954BIO *BIO_new_dgram_sctp(int fd, int close_flag)
0f113f3e
MC		 955{
956 BIO *bio;
957 int ret, optval = 20000;
958 int auth_data = 0, auth_forward = 0;
959 unsigned char *p;
960 struct sctp_authchunk auth;
961 struct sctp_authchunks *authchunks;
962 socklen_t sockopt_len;
963# ifdef SCTP_AUTHENTICATION_EVENT
964# ifdef SCTP_EVENT
965 struct sctp_event event;
966# else
967 struct sctp_event_subscribe event;
968# endif
969# endif
7e159e01 970
0f113f3e
MC		 971 bio = BIO_new(BIO_s_datagram_sctp());
972 if (bio == NULL)
973 return (NULL);
974 BIO_set_fd(bio, fd, close_flag);
975
976 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
977 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
978 ret =
979 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
980 sizeof(struct sctp_authchunk));
981 if (ret < 0) {
982 BIO_vfree(bio);
983 return (NULL);
984 }
985 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
986 ret =
987 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
988 sizeof(struct sctp_authchunk));
989 if (ret < 0) {
990 BIO_vfree(bio);
991 return (NULL);
992 }
993
994 /*
995 * Test if activation was successful. When using accept(), SCTP-AUTH has
996 * to be activated for the listening socket already, otherwise the
997 * connected socket won't use it.
998 */
999 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1000 authchunks = OPENSSL_malloc(sockopt_len);
61986d32 1001 if (!authchunks) {
918bb865
MC		 1002 BIO_vfree(bio);
1003 return (NULL);
1004 }
0f113f3e
MC		 1005 memset(authchunks, 0, sockopt_len);
1006 ret =
1007 getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
1008 &sockopt_len);
1009
1010 if (ret < 0) {
1011 OPENSSL_free(authchunks);
1012 BIO_vfree(bio);
1013 return (NULL);
1014 }
1015
1016 for (p = (unsigned char *)authchunks->gauth_chunks;
1017 p < (unsigned char *)authchunks + sockopt_len;
1018 p += sizeof(uint8_t)) {
1019 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1020 auth_data = 1;
1021 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1022 auth_forward = 1;
1023 }
1024
1025 OPENSSL_free(authchunks);
1026
1027 OPENSSL_assert(auth_data);
1028 OPENSSL_assert(auth_forward);
1029
1030# ifdef SCTP_AUTHENTICATION_EVENT
1031# ifdef SCTP_EVENT
16f8d4eb 1032 memset(&event, 0, sizeof(event));
0f113f3e
MC		 1033 event.se_assoc_id = 0;
1034 event.se_type = SCTP_AUTHENTICATION_EVENT;
1035 event.se_on = 1;
1036 ret =
1037 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
1038 sizeof(struct sctp_event));
1039 if (ret < 0) {
1040 BIO_vfree(bio);
1041 return (NULL);
1042 }
1043# else
1044 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
1045 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
1046 if (ret < 0) {
1047 BIO_vfree(bio);
1048 return (NULL);
1049 }
1050
1051 event.sctp_authentication_event = 1;
1052
1053 ret =
1054 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
1055 sizeof(struct sctp_event_subscribe));
1056 if (ret < 0) {
1057 BIO_vfree(bio);
1058 return (NULL);
1059 }
1060# endif
1061# endif
7e159e01 1062
0f113f3e
MC		 1063 /*
1064 * Disable partial delivery by setting the min size larger than the max
1065 * record size of 2^14 + 2048 + 13
1066 */
1067 ret =
1068 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
1069 sizeof(optval));
1070 if (ret < 0) {
1071 BIO_vfree(bio);
1072 return (NULL);
1073 }
1074
1075 return (bio);
1076}
7e159e01
DSH		 1077
1078int BIO_dgram_is_sctp(BIO *bio)
0f113f3e
MC		 1079{
1080 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
1081}
7e159e01
DSH		 1082
1083static int dgram_sctp_new(BIO *bi)
0f113f3e
MC		 1084{
1085 bio_dgram_sctp_data *data = NULL;
1086
1087 bi->init = 0;
1088 bi->num = 0;
b4faea50 1089 data = OPENSSL_malloc(sizeof(*data));
0f113f3e
MC		 1090 if (data == NULL)
1091 return 0;
16f8d4eb 1092 memset(data, 0, sizeof(*data));
0f113f3e
MC		 1093# ifdef SCTP_PR_SCTP_NONE
1094 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1095# endif
7e159e01
DSH		 1096 bi->ptr = data;
1097
0f113f3e
MC		 1098 bi->flags = 0;
1099 return (1);
1100}
7e159e01
DSH		 1101
1102static int dgram_sctp_free(BIO *a)
0f113f3e
MC		 1103{
1104 bio_dgram_sctp_data *data;
7e159e01 1105
0f113f3e
MC		 1106 if (a == NULL)
1107 return (0);
1108 if (!dgram_clear(a))
1109 return 0;
7e159e01 1110
0f113f3e
MC		 1111 data = (bio_dgram_sctp_data *) a->ptr;
1112 if (data != NULL) {
b548a1f1 1113 OPENSSL_free(data->saved_message.data);
0f113f3e
MC		 1114 OPENSSL_free(data);
1115 }
1116
1117 return (1);
1118}
7e159e01 1119
0f113f3e
MC		 1120# ifdef SCTP_AUTHENTICATION_EVENT
1121void dgram_sctp_handle_auth_free_key_event(BIO *b,
1122 union sctp_notification *snp)
1123{
1124 int ret;
1125 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
1126
1127 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
1128 struct sctp_authkeyid authkeyid;
1129
1130 /* delete key */
1131 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1132 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1133 &authkeyid, sizeof(struct sctp_authkeyid));
1134 }
1135}
1136# endif
1137
1138static int dgram_sctp_read(BIO *b, char *out, int outl)
1139{
1140 int ret = 0, n = 0, i, optval;
1141 socklen_t optlen;
1142 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1143 union sctp_notification *snp;
1144 struct msghdr msg;
1145 struct iovec iov;
1146 struct cmsghdr *cmsg;
1147 char cmsgbuf[512];
1148
1149 if (out != NULL) {
1150 clear_socket_error();
1151
1152 do {
16f8d4eb 1153 memset(&data->rcvinfo, 0, sizeof(data->rcvinfo));
0f113f3e
MC		 1154 iov.iov_base = out;
1155 iov.iov_len = outl;
1156 msg.msg_name = NULL;
1157 msg.msg_namelen = 0;
1158 msg.msg_iov = &iov;
1159 msg.msg_iovlen = 1;
1160 msg.msg_control = cmsgbuf;
1161 msg.msg_controllen = 512;
1162 msg.msg_flags = 0;
1163 n = recvmsg(b->num, &msg, 0);
1164
1165 if (n <= 0) {
1166 if (n < 0)
1167 ret = n;
1168 break;
1169 }
1170
1171 if (msg.msg_controllen > 0) {
1172 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1173 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1174 if (cmsg->cmsg_level != IPPROTO_SCTP)
1175 continue;
1176# ifdef SCTP_RCVINFO
1177 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1178 struct sctp_rcvinfo *rcvinfo;
1179
1180 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1181 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1182 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1183 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1184 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1185 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1186 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1187 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1188 }
1189# endif
1190# ifdef SCTP_SNDRCV
1191 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1192 struct sctp_sndrcvinfo *sndrcvinfo;
1193
1194 sndrcvinfo =
1195 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1196 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1197 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1198 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1199 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1200 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1201 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1202 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1203 }
1204# endif
1205 }
1206 }
1207
1208 if (msg.msg_flags & MSG_NOTIFICATION) {
1209 snp = (union sctp_notification *)out;
1210 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1211# ifdef SCTP_EVENT
1212 struct sctp_event event;
1213# else
1214 struct sctp_event_subscribe event;
1215 socklen_t eventsize;
1216# endif
1217 /*
1218 * If a message has been delayed until the socket is dry,
1219 * it can be sent now.
1220 */
1221 if (data->saved_message.length > 0) {
1222 dgram_sctp_write(data->saved_message.bio,
1223 data->saved_message.data,
1224 data->saved_message.length);
1225 OPENSSL_free(data->saved_message.data);
1226 data->saved_message.data = NULL;
1227 data->saved_message.length = 0;
1228 }
1229
1230 /* disable sender dry event */
1231# ifdef SCTP_EVENT
16f8d4eb 1232 memset(&event, 0, sizeof(event));
0f113f3e
MC		 1233 event.se_assoc_id = 0;
1234 event.se_type = SCTP_SENDER_DRY_EVENT;
1235 event.se_on = 0;
1236 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1237 sizeof(struct sctp_event));
1238 if (i < 0) {
1239 ret = i;
1240 break;
1241 }
1242# else
1243 eventsize = sizeof(struct sctp_event_subscribe);
1244 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1245 &eventsize);
1246 if (i < 0) {
1247 ret = i;
1248 break;
1249 }
1250
1251 event.sctp_sender_dry_event = 0;
1252
1253 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1254 sizeof(struct sctp_event_subscribe));
1255 if (i < 0) {
1256 ret = i;
1257 break;
1258 }
1259# endif
1260 }
1261# ifdef SCTP_AUTHENTICATION_EVENT
1262 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1263 dgram_sctp_handle_auth_free_key_event(b, snp);
1264# endif
1265
1266 if (data->handle_notifications != NULL)
1267 data->handle_notifications(b, data->notification_context,
1268 (void *)out);
1269
1270 memset(out, 0, outl);
1271 } else
1272 ret += n;
1273 }
1274 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1275 && (ret < outl));
1276
1277 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1278 /* Partial message read, this should never happen! */
1279
1280 /*
1281 * The buffer was too small, this means the peer sent a message
1282 * that was larger than allowed.
1283 */
1284 if (ret == outl)
1285 return -1;
1286
1287 /*
1288 * Test if socket buffer can handle max record size (2^14 + 2048
1289 * + 13)
1290 */
1291 optlen = (socklen_t) sizeof(int);
1292 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1293 if (ret >= 0)
1294 OPENSSL_assert(optval >= 18445);
1295
1296 /*
1297 * Test if SCTP doesn't partially deliver below max record size
1298 * (2^14 + 2048 + 13)
1299 */
1300 optlen = (socklen_t) sizeof(int);
1301 ret =
1302 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1303 &optval, &optlen);
1304 if (ret >= 0)
1305 OPENSSL_assert(optval >= 18445);
1306
1307 /*
1308 * Partially delivered notification??? Probably a bug....
1309 */
1310 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1311
1312 /*
1313 * Everything seems ok till now, so it's most likely a message
1314 * dropped by PR-SCTP.
1315 */
1316 memset(out, 0, outl);
1317 BIO_set_retry_read(b);
1318 return -1;
1319 }
1320
1321 BIO_clear_retry_flags(b);
1322 if (ret < 0) {
1323 if (BIO_dgram_should_retry(ret)) {
1324 BIO_set_retry_read(b);
1325 data->_errno = get_last_socket_error();
1326 }
1327 }
1328
1329 /* Test if peer uses SCTP-AUTH before continuing */
1330 if (!data->peer_auth_tested) {
1331 int ii, auth_data = 0, auth_forward = 0;
1332 unsigned char *p;
1333 struct sctp_authchunks *authchunks;
1334
1335 optlen =
1336 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1337 authchunks = OPENSSL_malloc(optlen);
918bb865 1338 if (!authchunks) {
7c82e339 1339 BIOerr(BIO_F_DGRAM_SCTP_READ, ERR_R_MALLOC_FAILURE);
918bb865
MC		 1340 return -1;
1341 }
0f113f3e
MC		 1342 memset(authchunks, 0, optlen);
1343 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1344 authchunks, &optlen);
1345
1346 if (ii >= 0)
1347 for (p = (unsigned char *)authchunks->gauth_chunks;
1348 p < (unsigned char *)authchunks + optlen;
1349 p += sizeof(uint8_t)) {
1350 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1351 auth_data = 1;
1352 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1353 auth_forward = 1;
1354 }
1355
1356 OPENSSL_free(authchunks);
1357
1358 if (!auth_data || !auth_forward) {
1359 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1360 return -1;
1361 }
1362
1363 data->peer_auth_tested = 1;
1364 }
1365 }
1366 return (ret);
1367}
7e159e01
DSH		 1368
1369static int dgram_sctp_write(BIO *b, const char *in, int inl)
0f113f3e
MC		 1370{
1371 int ret;
1372 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1373 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1374 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1375 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1376 struct iovec iov[1];
1377 struct msghdr msg;
1378 struct cmsghdr *cmsg;
1379# if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1380 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1381 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1382 struct sctp_sndinfo *sndinfo;
1383 struct sctp_prinfo *prinfo;
1384# else
1385 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1386 struct sctp_sndrcvinfo *sndrcvinfo;
1387# endif
7e159e01 1388
0f113f3e 1389 clear_socket_error();
7e159e01 1390
0f113f3e
MC		 1391 /*
1392 * If we're send anything else than application data, disable all user
1393 * parameters and flags.
1394 */
1395 if (in[0] != 23) {
16f8d4eb 1396 memset(&handshake_sinfo, 0, sizeof(handshake_sinfo));
0f113f3e
MC		 1397# ifdef SCTP_SACK_IMMEDIATELY
1398 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1399# endif
1400 sinfo = &handshake_sinfo;
1401 }
1402
1403 /*
1404 * If we have to send a shutdown alert message and the socket is not dry
1405 * yet, we have to save it and send it as soon as the socket gets dry.
1406 */
03a1c850
KR		 1407 if (data->save_shutdown) {
1408 ret = BIO_dgram_sctp_wait_for_dry(b);
1409 if (ret < 0) {
918bb865
MC		 1410 return -1;
1411 }
03a1c850
KR		 1412 if (ret == 0) {
1413 char *tmp;
1414 data->saved_message.bio = b;
1415 if ((tmp = OPENSSL_malloc(inl)) == NULL) {
1416 BIOerr(BIO_F_DGRAM_SCTP_WRITE, ERR_R_MALLOC_FAILURE);
1417 return -1;
1418 }
1419 OPENSSL_free(data->saved_message.data);
1420 data->saved_message.data = tmp;
1421 memcpy(data->saved_message.data, in, inl);
1422 data->saved_message.length = inl;
1423 return inl;
1424 }
0f113f3e
MC		 1425 }
1426
1427 iov[0].iov_base = (char *)in;
1428 iov[0].iov_len = inl;
1429 msg.msg_name = NULL;
1430 msg.msg_namelen = 0;
1431 msg.msg_iov = iov;
1432 msg.msg_iovlen = 1;
1433 msg.msg_control = (caddr_t) cmsgbuf;
1434 msg.msg_controllen = 0;
1435 msg.msg_flags = 0;
1436# if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1437 cmsg = (struct cmsghdr *)cmsgbuf;
1438 cmsg->cmsg_level = IPPROTO_SCTP;
1439 cmsg->cmsg_type = SCTP_SNDINFO;
1440 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1441 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
16f8d4eb 1442 memset(sndinfo, 0, sizeof(*sndinfo));
0f113f3e
MC		 1443 sndinfo->snd_sid = sinfo->snd_sid;
1444 sndinfo->snd_flags = sinfo->snd_flags;
1445 sndinfo->snd_ppid = sinfo->snd_ppid;
1446 sndinfo->snd_context = sinfo->snd_context;
1447 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1448
1449 cmsg =
1450 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1451 cmsg->cmsg_level = IPPROTO_SCTP;
1452 cmsg->cmsg_type = SCTP_PRINFO;
1453 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1454 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
16f8d4eb 1455 memset(prinfo, 0, sizeof(*prinfo));
0f113f3e
MC		 1456 prinfo->pr_policy = pinfo->pr_policy;
1457 prinfo->pr_value = pinfo->pr_value;
1458 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1459# else
1460 cmsg = (struct cmsghdr *)cmsgbuf;
1461 cmsg->cmsg_level = IPPROTO_SCTP;
1462 cmsg->cmsg_type = SCTP_SNDRCV;
1463 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1464 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
16f8d4eb 1465 memset(sndrcvinfo, 0, sizeof(*sndrcvinfo));
0f113f3e
MC		 1466 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1467 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1468# ifdef __FreeBSD__
1469 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1470# endif
1471 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1472 sndrcvinfo->sinfo_context = sinfo->snd_context;
1473 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1474 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1475# endif
7e159e01 1476
0f113f3e 1477 ret = sendmsg(b->num, &msg, 0);
7e159e01 1478
0f113f3e
MC		 1479 BIO_clear_retry_flags(b);
1480 if (ret <= 0) {
1481 if (BIO_dgram_should_retry(ret)) {
1482 BIO_set_retry_write(b);
1483 data->_errno = get_last_socket_error();
1484 }
1485 }
1486 return (ret);
1487}
7e159e01
DSH		 1488
1489static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
0f113f3e
MC		 1490{
1491 long ret = 1;
1492 bio_dgram_sctp_data *data = NULL;
1493 socklen_t sockopt_len = 0;
1494 struct sctp_authkeyid authkeyid;
1495 struct sctp_authkey *authkey = NULL;
1496
1497 data = (bio_dgram_sctp_data *) b->ptr;
1498
1499 switch (cmd) {
1500 case BIO_CTRL_DGRAM_QUERY_MTU:
1501 /*
1502 * Set to maximum (2^14) and ignore user input to enable transport
1503 * protocol fragmentation. Returns always 2^14.
1504 */
1505 data->mtu = 16384;
1506 ret = data->mtu;
1507 break;
1508 case BIO_CTRL_DGRAM_SET_MTU:
1509 /*
1510 * Set to maximum (2^14) and ignore input to enable transport
1511 * protocol fragmentation. Returns always 2^14.
1512 */
1513 data->mtu = 16384;
1514 ret = data->mtu;
1515 break;
1516 case BIO_CTRL_DGRAM_SET_CONNECTED:
1517 case BIO_CTRL_DGRAM_CONNECT:
1518 /* Returns always -1. */
1519 ret = -1;
1520 break;
1521 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1522 /*
1523 * SCTP doesn't need the DTLS timer Returns always 1.
1524 */
1525 break;
1526 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1527 /*
1528 * We allow transport protocol fragmentation so this is irrelevant
1529 */
1530 ret = 0;
1531 break;
1532 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1533 if (num > 0)
1534 data->in_handshake = 1;
1535 else
1536 data->in_handshake = 0;
1537
1538 ret =
1539 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1540 &data->in_handshake, sizeof(int));
1541 break;
1542 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1543 /*
1544 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1545 */
1546
1547 /* Get active key */
1548 sockopt_len = sizeof(struct sctp_authkeyid);
1549 ret =
1550 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1551 &sockopt_len);
1552 if (ret < 0)
1553 break;
1554
1555 /* Add new key */
1556 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1557 authkey = OPENSSL_malloc(sockopt_len);
1558 if (authkey == NULL) {
1559 ret = -1;
1560 break;
1561 }
16f8d4eb 1562 memset(authkey, 0, sockopt_len);
0f113f3e
MC		 1563 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1564# ifndef __FreeBSD__
1565 /*
1566 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1567 * and higher work without it.
1568 */
1569 authkey->sca_keylength = 64;
1570# endif
1571 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1572
1573 ret =
1574 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1575 sockopt_len);
1576 OPENSSL_free(authkey);
1577 authkey = NULL;
1578 if (ret < 0)
1579 break;
1580
1581 /* Reset active key */
1582 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1583 &authkeyid, sizeof(struct sctp_authkeyid));
1584 if (ret < 0)
1585 break;
1586
1587 break;
1588 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1589 /* Returns 0 on success, -1 otherwise. */
1590
1591 /* Get active key */
1592 sockopt_len = sizeof(struct sctp_authkeyid);
1593 ret =
1594 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1595 &sockopt_len);
1596 if (ret < 0)
1597 break;
1598
1599 /* Set active key */
1600 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1601 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1602 &authkeyid, sizeof(struct sctp_authkeyid));
1603 if (ret < 0)
1604 break;
1605
1606 /*
1607 * CCS has been sent, so remember that and fall through to check if
1608 * we need to deactivate an old key
1609 */
1610 data->ccs_sent = 1;
1611
1612 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1613 /* Returns 0 on success, -1 otherwise. */
1614
1615 /*
1616 * Has this command really been called or is this just a
1617 * fall-through?
1618 */
1619 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1620 data->ccs_rcvd = 1;
1621
1622 /*
1623 * CSS has been both, received and sent, so deactivate an old key
1624 */
1625 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1626 /* Get active key */
1627 sockopt_len = sizeof(struct sctp_authkeyid);
1628 ret =
1629 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1630 &authkeyid, &sockopt_len);
1631 if (ret < 0)
1632 break;
1633
1634 /*
1635 * Deactivate key or delete second last key if
1636 * SCTP_AUTHENTICATION_EVENT is not available.
1637 */
1638 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1639# ifdef SCTP_AUTH_DEACTIVATE_KEY
1640 sockopt_len = sizeof(struct sctp_authkeyid);
1641 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1642 &authkeyid, sockopt_len);
1643 if (ret < 0)
1644 break;
1645# endif
1646# ifndef SCTP_AUTHENTICATION_EVENT
1647 if (authkeyid.scact_keynumber > 0) {
1648 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1649 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1650 &authkeyid, sizeof(struct sctp_authkeyid));
1651 if (ret < 0)
1652 break;
1653 }
1654# endif
7e159e01 1655
0f113f3e
MC		 1656 data->ccs_rcvd = 0;
1657 data->ccs_sent = 0;
1658 }
1659 break;
1660 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1661 /* Returns the size of the copied struct. */
1662 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1663 num = sizeof(struct bio_dgram_sctp_sndinfo);
1664
1665 memcpy(ptr, &(data->sndinfo), num);
1666 ret = num;
1667 break;
1668 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1669 /* Returns the size of the copied struct. */
1670 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1671 num = sizeof(struct bio_dgram_sctp_sndinfo);
1672
1673 memcpy(&(data->sndinfo), ptr, num);
1674 break;
1675 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1676 /* Returns the size of the copied struct. */
1677 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1678 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1679
1680 memcpy(ptr, &data->rcvinfo, num);
1681
1682 ret = num;
1683 break;
1684 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1685 /* Returns the size of the copied struct. */
1686 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1687 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1688
1689 memcpy(&(data->rcvinfo), ptr, num);
1690 break;
1691 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1692 /* Returns the size of the copied struct. */
1693 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1694 num = sizeof(struct bio_dgram_sctp_prinfo);
1695
1696 memcpy(ptr, &(data->prinfo), num);
1697 ret = num;
1698 break;
1699 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1700 /* Returns the size of the copied struct. */
1701 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1702 num = sizeof(struct bio_dgram_sctp_prinfo);
1703
1704 memcpy(&(data->prinfo), ptr, num);
1705 break;
1706 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1707 /* Returns always 1. */
1708 if (num > 0)
1709 data->save_shutdown = 1;
1710 else
1711 data->save_shutdown = 0;
1712 break;
1713
1714 default:
1715 /*
1716 * Pass to default ctrl function to process SCTP unspecific commands
1717 */
1718 ret = dgram_ctrl(b, cmd, num, ptr);
1719 break;
1720 }
1721 return (ret);
1722}
7e159e01
DSH		 1723
1724int BIO_dgram_sctp_notification_cb(BIO *b,
0f113f3e
MC		 1725 void (*handle_notifications) (BIO *bio,
1726 void
1727 *context,
1728 void *buf),
7e159e01 1729 void *context)
0f113f3e
MC		 1730{
1731 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
7e159e01 1732
0f113f3e
MC		 1733 if (handle_notifications != NULL) {
1734 data->handle_notifications = handle_notifications;
1735 data->notification_context = context;
1736 } else
1737 return -1;
7e159e01 1738
0f113f3e
MC		 1739 return 0;
1740}
7e159e01 1741
03a1c850
KR		 1742/*
1743 * BIO_dgram_sctp_wait_for_dry - Wait for SCTP SENDER_DRY event
1744 * @b: The BIO to check for the dry event
1745 *
1746 * Wait until the peer confirms all packets have been received, and so that
1747 * our kernel doesn't have anything to send anymore. This is only received by
1748 * the peer's kernel, not the application.
1749 *
1750 * Returns:
1751 * -1 on error
1752 * 0 when not dry yet
1753 * 1 when dry
1754 */
7e159e01
DSH		 1755int BIO_dgram_sctp_wait_for_dry(BIO *b)
1756{
0f113f3e
MC		 1757 int is_dry = 0;
1758 int n, sockflags, ret;
1759 union sctp_notification snp;
1760 struct msghdr msg;
1761 struct iovec iov;
1762# ifdef SCTP_EVENT
1763 struct sctp_event event;
1764# else
1765 struct sctp_event_subscribe event;
1766 socklen_t eventsize;
1767# endif
1768 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1769
1770 /* set sender dry event */
1771# ifdef SCTP_EVENT
16f8d4eb 1772 memset(&event, 0, sizeof(event));
0f113f3e
MC		 1773 event.se_assoc_id = 0;
1774 event.se_type = SCTP_SENDER_DRY_EVENT;
1775 event.se_on = 1;
1776 ret =
1777 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1778 sizeof(struct sctp_event));
1779# else
1780 eventsize = sizeof(struct sctp_event_subscribe);
1781 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1782 if (ret < 0)
1783 return -1;
1784
1785 event.sctp_sender_dry_event = 1;
1786
1787 ret =
1788 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1789 sizeof(struct sctp_event_subscribe));
1790# endif
1791 if (ret < 0)
1792 return -1;
1793
1794 /* peek for notification */
16f8d4eb 1795 memset(&snp, 0, sizeof(snp));
0f113f3e
MC		 1796 iov.iov_base = (char *)&snp;
1797 iov.iov_len = sizeof(union sctp_notification);
1798 msg.msg_name = NULL;
1799 msg.msg_namelen = 0;
1800 msg.msg_iov = &iov;
1801 msg.msg_iovlen = 1;
1802 msg.msg_control = NULL;
1803 msg.msg_controllen = 0;
1804 msg.msg_flags = 0;
1805
1806 n = recvmsg(b->num, &msg, MSG_PEEK);
1807 if (n <= 0) {
1808 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1809 && (get_last_socket_error() != EWOULDBLOCK))
1810 return -1;
1811 else
1812 return 0;
1813 }
1814
1815 /* if we find a notification, process it and try again if necessary */
1816 while (msg.msg_flags & MSG_NOTIFICATION) {
16f8d4eb 1817 memset(&snp, 0, sizeof(snp));
0f113f3e
MC		 1818 iov.iov_base = (char *)&snp;
1819 iov.iov_len = sizeof(union sctp_notification);
1820 msg.msg_name = NULL;
1821 msg.msg_namelen = 0;
1822 msg.msg_iov = &iov;
1823 msg.msg_iovlen = 1;
1824 msg.msg_control = NULL;
1825 msg.msg_controllen = 0;
1826 msg.msg_flags = 0;
1827
1828 n = recvmsg(b->num, &msg, 0);
1829 if (n <= 0) {
1830 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1831 && (get_last_socket_error() != EWOULDBLOCK))
1832 return -1;
1833 else
1834 return is_dry;
1835 }
1836
1837 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1838 is_dry = 1;
1839
1840 /* disable sender dry event */
1841# ifdef SCTP_EVENT
16f8d4eb 1842 memset(&event, 0, sizeof(event));
0f113f3e
MC		 1843 event.se_assoc_id = 0;
1844 event.se_type = SCTP_SENDER_DRY_EVENT;
1845 event.se_on = 0;
1846 ret =
1847 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1848 sizeof(struct sctp_event));
1849# else
1850 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1851 ret =
1852 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1853 &eventsize);
1854 if (ret < 0)
1855 return -1;
1856
1857 event.sctp_sender_dry_event = 0;
1858
1859 ret =
1860 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1861 sizeof(struct sctp_event_subscribe));
1862# endif
1863 if (ret < 0)
1864 return -1;
1865 }
1866# ifdef SCTP_AUTHENTICATION_EVENT
1867 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1868 dgram_sctp_handle_auth_free_key_event(b, &snp);
1869# endif
7e159e01 1870
0f113f3e
MC		 1871 if (data->handle_notifications != NULL)
1872 data->handle_notifications(b, data->notification_context,
1873 (void *)&snp);
1874
1875 /* found notification, peek again */
16f8d4eb 1876 memset(&snp, 0, sizeof(snp));
0f113f3e
MC		 1877 iov.iov_base = (char *)&snp;
1878 iov.iov_len = sizeof(union sctp_notification);
1879 msg.msg_name = NULL;
1880 msg.msg_namelen = 0;
1881 msg.msg_iov = &iov;
1882 msg.msg_iovlen = 1;
1883 msg.msg_control = NULL;
1884 msg.msg_controllen = 0;
1885 msg.msg_flags = 0;
1886
1887 /* if we have seen the dry already, don't wait */
1888 if (is_dry) {
1889 sockflags = fcntl(b->num, F_GETFL, 0);
1890 fcntl(b->num, F_SETFL, O_NONBLOCK);
1891 }
1892
1893 n = recvmsg(b->num, &msg, MSG_PEEK);
1894
1895 if (is_dry) {
1896 fcntl(b->num, F_SETFL, sockflags);
1897 }
1898
1899 if (n <= 0) {
1900 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1901 && (get_last_socket_error() != EWOULDBLOCK))
1902 return -1;
1903 else
1904 return is_dry;
1905 }
1906 }
1907
1908 /* read anything else */
1909 return is_dry;
7e159e01
DSH		 1910}
1911
1912int BIO_dgram_sctp_msg_waiting(BIO *b)
0f113f3e
MC		 1913{
1914 int n, sockflags;
1915 union sctp_notification snp;
1916 struct msghdr msg;
1917 struct iovec iov;
1918 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1919
1920 /* Check if there are any messages waiting to be read */
1921 do {
16f8d4eb 1922 memset(&snp, 0, sizeof(snp));
0f113f3e
MC		 1923 iov.iov_base = (char *)&snp;
1924 iov.iov_len = sizeof(union sctp_notification);
1925 msg.msg_name = NULL;
1926 msg.msg_namelen = 0;
1927 msg.msg_iov = &iov;
1928 msg.msg_iovlen = 1;
1929 msg.msg_control = NULL;
1930 msg.msg_controllen = 0;
1931 msg.msg_flags = 0;
1932
1933 sockflags = fcntl(b->num, F_GETFL, 0);
1934 fcntl(b->num, F_SETFL, O_NONBLOCK);
1935 n = recvmsg(b->num, &msg, MSG_PEEK);
1936 fcntl(b->num, F_SETFL, sockflags);
1937
1938 /* if notification, process and try again */
1939 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1940# ifdef SCTP_AUTHENTICATION_EVENT
1941 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1942 dgram_sctp_handle_auth_free_key_event(b, &snp);
1943# endif
7e159e01 1944
16f8d4eb 1945 memset(&snp, 0, sizeof(snp));
0f113f3e
MC		 1946 iov.iov_base = (char *)&snp;
1947 iov.iov_len = sizeof(union sctp_notification);
1948 msg.msg_name = NULL;
1949 msg.msg_namelen = 0;
1950 msg.msg_iov = &iov;
1951 msg.msg_iovlen = 1;
1952 msg.msg_control = NULL;
1953 msg.msg_controllen = 0;
1954 msg.msg_flags = 0;
1955 n = recvmsg(b->num, &msg, 0);
1956
1957 if (data->handle_notifications != NULL)
1958 data->handle_notifications(b, data->notification_context,
1959 (void *)&snp);
1960 }
1961
1962 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1963
1964 /* Return 1 if there is a message to be read, return 0 otherwise. */
1965 if (n > 0)
1966 return 1;
1967 else
1968 return 0;
1969}
7e159e01
DSH		 1970
1971static int dgram_sctp_puts(BIO *bp, const char *str)
0f113f3e
MC		 1972{
1973 int n, ret;
7e159e01 1974
0f113f3e
MC		 1975 n = strlen(str);
1976 ret = dgram_sctp_write(bp, str, n);
1977 return (ret);
1978}
1979# endif
7e159e01 1980
b3e72fc3 1981static int BIO_dgram_should_retry(int i)
0f113f3e
MC		 1982{
1983 int err;
36d16f8e 1984
0f113f3e
MC		 1985 if ((i == 0) || (i == -1)) {
1986 err = get_last_socket_error();
36d16f8e 1987
0f113f3e
MC		 1988# if defined(OPENSSL_SYS_WINDOWS)
1989 /*
1990 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1991 * this point, the error code was overwritten by another system call
1992 * before this error handling is called.
1993 */
36d16f8e
BL		 1994# endif
1995
0f113f3e
MC		 1996 return (BIO_dgram_non_fatal_error(err));
1997 }
1998 return (0);
1999}
2000
2001int BIO_dgram_non_fatal_error(int err)
2002{
2003 switch (err) {
2004# if defined(OPENSSL_SYS_WINDOWS)
2005# if defined(WSAEWOULDBLOCK)
2006 case WSAEWOULDBLOCK:
2007# endif
36d16f8e 2008# endif
36d16f8e 2009
0f113f3e
MC		 2010# ifdef EWOULDBLOCK
2011# ifdef WSAEWOULDBLOCK
2012# if WSAEWOULDBLOCK != EWOULDBLOCK
2013 case EWOULDBLOCK:
2014# endif
2015# else
2016 case EWOULDBLOCK:
36d16f8e 2017# endif
36d16f8e 2018# endif
36d16f8e 2019
0f113f3e
MC		 2020# ifdef EINTR
2021 case EINTR:
2022# endif
36d16f8e 2023
0f113f3e
MC		 2024# ifdef EAGAIN
2025# if EWOULDBLOCK != EAGAIN
2026 case EAGAIN:
2027# endif
36d16f8e 2028# endif
36d16f8e 2029
0f113f3e
MC		 2030# ifdef EPROTO
2031 case EPROTO:
2032# endif
36d16f8e 2033
0f113f3e
MC		 2034# ifdef EINPROGRESS
2035 case EINPROGRESS:
2036# endif
36d16f8e 2037
0f113f3e
MC		 2038# ifdef EALREADY
2039 case EALREADY:
2040# endif
36d16f8e 2041
0f113f3e
MC		 2042 return (1);
2043 /* break; */
2044 default:
2045 break;
2046 }
2047 return (0);
2048}
5d6a0179
RL		 2049
2050static void get_current_time(struct timeval *t)
0f113f3e
MC		 2051{
2052# if defined(_WIN32)
2053 SYSTEMTIME st;
2054 union {
2055 unsigned __int64 ul;
2056 FILETIME ft;
2057 } now;
2058
2059 GetSystemTime(&st);
2060 SystemTimeToFileTime(&st, &now.ft);
2061# ifdef __MINGW32__
2062 now.ul -= 116444736000000000ULL;
2063# else
d2a0d72f 2064 now.ul -= 116444736000000000UI64; /* re-bias to 1/1/1970 */
0f113f3e
MC		 2065# endif
2066 t->tv_sec = (long)(now.ul / 10000000);
2067 t->tv_usec = ((int)(now.ul % 10000000)) / 10;
2068# elif defined(OPENSSL_SYS_VMS)
2069 struct timeb tb;
2070 ftime(&tb);
2071 t->tv_sec = (long)tb.time;
2072 t->tv_usec = (long)tb.millitm * 1000;
2073# else
2074 gettimeofday(t, NULL);
2075# endif
2076}
74e056ed
DSH		 2077
2078#endif
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