1 /* crypto/bio/bio_dgram.c */
3 * DTLS implementation written by Nagendra Modadugu
4 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
6 /* ====================================================================
7 * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
65 #include <openssl/bio.h>
66 #ifndef OPENSSL_NO_DGRAM
68 # if !(defined(_WIN32) || defined(OPENSSL_SYS_VMS))
69 # include <sys/time.h>
71 # if defined(OPENSSL_SYS_VMS)
72 # include <sys/timeb.h>
75 # ifndef OPENSSL_NO_SCTP
76 # include <netinet/sctp.h>
78 # define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
79 # define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
82 # if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
83 # define IP_MTU 14 /* linux is lame */
86 # if OPENSSL_USE_IPV6 && !defined(IPPROTO_IPV6)
87 # define IPPROTO_IPV6 41 /* windows is lame */
90 # if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
91 /* Standard definition causes type-punning problems. */
92 # undef IN6_IS_ADDR_V4MAPPED
93 # define s6_addr32 __u6_addr.__u6_addr32
94 # define IN6_IS_ADDR_V4MAPPED(a) \
95 (((a)->s6_addr32[0] == 0) && \
96 ((a)->s6_addr32[1] == 0) && \
97 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
101 # define sock_write SockWrite /* Watt-32 uses same names */
102 # define sock_read SockRead
103 # define sock_puts SockPuts
106 static int dgram_write(BIO *h, const char *buf, int num);
107 static int dgram_read(BIO *h, char *buf, int size);
108 static int dgram_puts(BIO *h, const char *str);
109 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
110 static int dgram_new(BIO *h);
111 static int dgram_free(BIO *data);
112 static int dgram_clear(BIO *bio);
114 # ifndef OPENSSL_NO_SCTP
115 static int dgram_sctp_write(BIO *h, const char *buf, int num);
116 static int dgram_sctp_read(BIO *h, char *buf, int size);
117 static int dgram_sctp_puts(BIO *h, const char *str);
118 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
119 static int dgram_sctp_new(BIO *h);
120 static int dgram_sctp_free(BIO *data);
121 # ifdef SCTP_AUTHENTICATION_EVENT
122 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification
127 static int BIO_dgram_should_retry(int s);
129 static void get_current_time(struct timeval *t);
131 static BIO_METHOD methods_dgramp = {
137 NULL, /* dgram_gets, */
144 # ifndef OPENSSL_NO_SCTP
145 static BIO_METHOD methods_dgramp_sctp = {
147 "datagram sctp socket",
151 NULL, /* dgram_gets, */
159 typedef struct bio_dgram_data_st {
162 struct sockaddr_in sa_in;
163 # if OPENSSL_USE_IPV6
164 struct sockaddr_in6 sa_in6;
167 unsigned int connected;
170 struct timeval next_timeout;
171 struct timeval socket_timeout;
174 # ifndef OPENSSL_NO_SCTP
175 typedef struct bio_dgram_sctp_save_message_st {
179 } bio_dgram_sctp_save_message;
181 typedef struct bio_dgram_sctp_data_st {
184 struct sockaddr_in sa_in;
185 # if OPENSSL_USE_IPV6
186 struct sockaddr_in6 sa_in6;
189 unsigned int connected;
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;
201 int peer_auth_tested;
202 bio_dgram_sctp_save_message saved_message;
203 } bio_dgram_sctp_data;
206 BIO_METHOD *BIO_s_datagram(void)
208 return (&methods_dgramp);
211 BIO *BIO_new_dgram(int fd, int close_flag)
215 ret = BIO_new(BIO_s_datagram());
218 BIO_set_fd(ret, fd, close_flag);
222 static int dgram_new(BIO *bi)
224 bio_dgram_data *data = NULL;
228 data = OPENSSL_malloc(sizeof(bio_dgram_data));
231 memset(data, 0x00, sizeof(bio_dgram_data));
238 static int dgram_free(BIO *a)
240 bio_dgram_data *data;
247 data = (bio_dgram_data *)a->ptr;
254 static int dgram_clear(BIO *a)
268 static void dgram_adjust_rcv_timeout(BIO *b)
270 # if defined(SO_RCVTIMEO)
271 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
279 /* Is a timer active? */
280 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
281 struct timeval timenow, timeleft;
283 /* Read current socket timeout */
284 # ifdef OPENSSL_SYS_WINDOWS
287 sz.i = sizeof(timeout);
288 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
289 (void *)&timeout, &sz.i) < 0) {
290 perror("getsockopt");
292 data->socket_timeout.tv_sec = timeout / 1000;
293 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
296 sz.i = sizeof(data->socket_timeout);
297 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
298 &(data->socket_timeout), (void *)&sz) < 0) {
299 perror("getsockopt");
300 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0)
301 OPENSSL_assert(sz.s <= sizeof(data->socket_timeout));
304 /* Get current time */
305 get_current_time(&timenow);
307 /* Calculate time left until timer expires */
308 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
309 timeleft.tv_sec -= timenow.tv_sec;
310 timeleft.tv_usec -= timenow.tv_usec;
311 if (timeleft.tv_usec < 0) {
313 timeleft.tv_usec += 1000000;
316 if (timeleft.tv_sec < 0) {
318 timeleft.tv_usec = 1;
322 * Adjust socket timeout if next handhake message timer will expire
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");
337 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
338 sizeof(struct timeval)) < 0) {
339 perror("setsockopt");
347 static void dgram_reset_rcv_timeout(BIO *b)
349 # if defined(SO_RCVTIMEO)
350 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
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");
363 (b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
364 sizeof(struct timeval)) < 0) {
365 perror("setsockopt");
372 static int dgram_read(BIO *b, char *out, int outl)
375 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
379 * See commentary in b_sock.c. <appro>
387 struct sockaddr_in sa_in;
388 # if OPENSSL_USE_IPV6
389 struct sockaddr_in6 sa_in6;
395 sa.len.i = sizeof(sa.peer);
398 clear_socket_error();
399 memset(&sa.peer, 0x00, sizeof(sa.peer));
400 dgram_adjust_rcv_timeout(b);
401 ret = recvfrom(b->num, out, outl, 0, &sa.peer.sa, (void *)&sa.len);
402 if (sizeof(sa.len.i) != sizeof(sa.len.s) && sa.len.i == 0) {
403 OPENSSL_assert(sa.len.s <= sizeof(sa.peer));
404 sa.len.i = (int)sa.len.s;
407 if (!data->connected && ret >= 0)
408 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
410 BIO_clear_retry_flags(b);
412 if (BIO_dgram_should_retry(ret)) {
413 BIO_set_retry_read(b);
414 data->_errno = get_last_socket_error();
418 dgram_reset_rcv_timeout(b);
423 static int dgram_write(BIO *b, const char *in, int inl)
426 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
427 clear_socket_error();
430 ret = writesocket(b->num, in, inl);
432 int peerlen = sizeof(data->peer);
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);
440 # if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
441 ret = sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
443 ret = sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
447 BIO_clear_retry_flags(b);
449 if (BIO_dgram_should_retry(ret)) {
450 BIO_set_retry_write(b);
451 data->_errno = get_last_socket_error();
453 # if 0 /* higher layers are responsible for querying
454 * MTU, if necessary */
455 if (data->_errno == EMSGSIZE)
456 /* retrieve the new MTU */
457 BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
464 static long dgram_get_mtu_overhead(bio_dgram_data *data)
468 switch (data->peer.sa.sa_family) {
471 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
475 # if OPENSSL_USE_IPV6
477 # ifdef IN6_IS_ADDR_V4MAPPED
478 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
480 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
486 * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
492 /* We don't know. Go with the historical default */
499 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
503 struct sockaddr *to = NULL;
504 bio_dgram_data *data = NULL;
506 # if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
507 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
508 * modern enough to define socklen_t */
512 struct sockaddr_in s4;
513 # if OPENSSL_USE_IPV6
514 struct sockaddr_in6 s6;
519 data = (bio_dgram_data *)b->ptr;
524 case BIO_C_FILE_SEEK:
527 case BIO_C_FILE_TELL:
533 b->num = *((int *)ptr);
534 b->shutdown = (int)num;
546 case BIO_CTRL_GET_CLOSE:
549 case BIO_CTRL_SET_CLOSE:
550 b->shutdown = (int)num;
552 case BIO_CTRL_PENDING:
553 case BIO_CTRL_WPENDING:
560 case BIO_CTRL_DGRAM_CONNECT:
561 to = (struct sockaddr *)ptr;
563 if (connect(b->num, to, sizeof(struct sockaddr)) < 0) {
568 switch (to->sa_family) {
570 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
572 # if OPENSSL_USE_IPV6
574 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
578 memcpy(&data->peer, to, sizeof(data->peer.sa));
585 /* (Linux)kernel sets DF bit on outgoing IP packets */
586 case BIO_CTRL_DGRAM_MTU_DISCOVER:
587 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
588 addr_len = (socklen_t) sizeof(addr);
589 memset((void *)&addr, 0, sizeof(addr));
590 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
594 switch (addr.sa.sa_family) {
596 sockopt_val = IP_PMTUDISC_DO;
597 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
598 &sockopt_val, sizeof(sockopt_val))) < 0)
599 perror("setsockopt");
601 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
603 sockopt_val = IPV6_PMTUDISC_DO;
604 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
605 &sockopt_val, sizeof(sockopt_val))) < 0)
606 perror("setsockopt");
617 case BIO_CTRL_DGRAM_QUERY_MTU:
618 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
619 addr_len = (socklen_t) sizeof(addr);
620 memset((void *)&addr, 0, sizeof(addr));
621 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
625 sockopt_len = sizeof(sockopt_val);
626 switch (addr.sa.sa_family) {
629 getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
630 &sockopt_len)) < 0 || sockopt_val < 0) {
634 * we assume that the transport protocol is UDP and no IP
637 data->mtu = sockopt_val - 8 - 20;
641 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
644 getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
645 (void *)&sockopt_val, &sockopt_len)) < 0
646 || sockopt_val < 0) {
650 * we assume that the transport protocol is UDP and no IPV6
653 data->mtu = sockopt_val - 8 - 40;
666 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
667 ret = -dgram_get_mtu_overhead(data);
668 switch (data->peer.sa.sa_family) {
672 # if OPENSSL_USE_IPV6
674 # ifdef IN6_IS_ADDR_V4MAPPED
675 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
687 case BIO_CTRL_DGRAM_GET_MTU:
690 case BIO_CTRL_DGRAM_SET_MTU:
694 case BIO_CTRL_DGRAM_SET_CONNECTED:
695 to = (struct sockaddr *)ptr;
699 switch (to->sa_family) {
701 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
703 # if OPENSSL_USE_IPV6
705 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
709 memcpy(&data->peer, to, sizeof(data->peer.sa));
714 memset(&(data->peer), 0x00, sizeof(data->peer));
717 case BIO_CTRL_DGRAM_GET_PEER:
718 switch (data->peer.sa.sa_family) {
720 ret = sizeof(data->peer.sa_in);
722 # if OPENSSL_USE_IPV6
724 ret = sizeof(data->peer.sa_in6);
728 ret = sizeof(data->peer.sa);
731 if (num == 0 || num > ret)
733 memcpy(ptr, &data->peer, (ret = num));
735 case BIO_CTRL_DGRAM_SET_PEER:
736 to = (struct sockaddr *)ptr;
737 switch (to->sa_family) {
739 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
741 # if OPENSSL_USE_IPV6
743 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
747 memcpy(&data->peer, to, sizeof(data->peer.sa));
751 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
752 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
754 # if defined(SO_RCVTIMEO)
755 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
756 # ifdef OPENSSL_SYS_WINDOWS
758 struct timeval *tv = (struct timeval *)ptr;
759 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
760 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
761 (void *)&timeout, sizeof(timeout)) < 0) {
762 perror("setsockopt");
767 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
768 sizeof(struct timeval)) < 0) {
769 perror("setsockopt");
774 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
782 # ifdef OPENSSL_SYS_WINDOWS
784 struct timeval *tv = (struct timeval *)ptr;
786 sz.i = sizeof(timeout);
787 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
788 (void *)&timeout, &sz.i) < 0) {
789 perror("getsockopt");
792 tv->tv_sec = timeout / 1000;
793 tv->tv_usec = (timeout % 1000) * 1000;
797 sz.i = sizeof(struct timeval);
798 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
799 ptr, (void *)&sz) < 0) {
800 perror("getsockopt");
802 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
803 OPENSSL_assert(sz.s <= sizeof(struct timeval));
811 # if defined(SO_SNDTIMEO)
812 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
813 # ifdef OPENSSL_SYS_WINDOWS
815 struct timeval *tv = (struct timeval *)ptr;
816 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
817 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
818 (void *)&timeout, sizeof(timeout)) < 0) {
819 perror("setsockopt");
824 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
825 sizeof(struct timeval)) < 0) {
826 perror("setsockopt");
831 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
839 # ifdef OPENSSL_SYS_WINDOWS
841 struct timeval *tv = (struct timeval *)ptr;
843 sz.i = sizeof(timeout);
844 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
845 (void *)&timeout, &sz.i) < 0) {
846 perror("getsockopt");
849 tv->tv_sec = timeout / 1000;
850 tv->tv_usec = (timeout % 1000) * 1000;
854 sz.i = sizeof(struct timeval);
855 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
856 ptr, (void *)&sz) < 0) {
857 perror("getsockopt");
859 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
860 OPENSSL_assert(sz.s <= sizeof(struct timeval));
868 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
870 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
871 # ifdef OPENSSL_SYS_WINDOWS
872 if (data->_errno == WSAETIMEDOUT)
874 if (data->_errno == EAGAIN)
883 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
884 if (data->_errno == EMSGSIZE) {
891 case BIO_CTRL_DGRAM_SET_DONT_FRAG:
892 sockopt_val = num ? 1 : 0;
894 switch (data->peer.sa.sa_family) {
896 # if defined(IP_DONTFRAG)
897 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG,
898 &sockopt_val, sizeof(sockopt_val))) < 0) {
899 perror("setsockopt");
902 # elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTUDISCOVER)
903 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
904 (ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
905 &sockopt_val, sizeof(sockopt_val))) < 0) {
906 perror("setsockopt");
909 # elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT)
910 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT,
911 (const char *)&sockopt_val,
912 sizeof(sockopt_val))) < 0) {
913 perror("setsockopt");
920 # if OPENSSL_USE_IPV6
922 # if defined(IPV6_DONTFRAG)
923 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
924 (const void *)&sockopt_val,
925 sizeof(sockopt_val))) < 0) {
926 perror("setsockopt");
929 # elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER)
930 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
931 (ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
932 &sockopt_val, sizeof(sockopt_val))) < 0) {
933 perror("setsockopt");
946 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
947 ret = dgram_get_mtu_overhead(data);
956 static int dgram_puts(BIO *bp, const char *str)
961 ret = dgram_write(bp, str, n);
965 # ifndef OPENSSL_NO_SCTP
966 BIO_METHOD *BIO_s_datagram_sctp(void)
968 return (&methods_dgramp_sctp);
971 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
974 int ret, optval = 20000;
975 int auth_data = 0, auth_forward = 0;
977 struct sctp_authchunk auth;
978 struct sctp_authchunks *authchunks;
979 socklen_t sockopt_len;
980 # ifdef SCTP_AUTHENTICATION_EVENT
982 struct sctp_event event;
984 struct sctp_event_subscribe event;
988 bio = BIO_new(BIO_s_datagram_sctp());
991 BIO_set_fd(bio, fd, close_flag);
993 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
994 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
996 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
997 sizeof(struct sctp_authchunk));
1002 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
1004 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
1005 sizeof(struct sctp_authchunk));
1012 * Test if activation was successful. When using accept(), SCTP-AUTH has
1013 * to be activated for the listening socket already, otherwise the
1014 * connected socket won't use it.
1016 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1017 authchunks = OPENSSL_malloc(sockopt_len);
1018 memset(authchunks, 0, sockopt_len);
1020 getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
1024 OPENSSL_free(authchunks);
1029 for (p = (unsigned char *)authchunks->gauth_chunks;
1030 p < (unsigned char *)authchunks + sockopt_len;
1031 p += sizeof(uint8_t)) {
1032 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1034 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1038 OPENSSL_free(authchunks);
1040 OPENSSL_assert(auth_data);
1041 OPENSSL_assert(auth_forward);
1043 # ifdef SCTP_AUTHENTICATION_EVENT
1045 memset(&event, 0, sizeof(struct sctp_event));
1046 event.se_assoc_id = 0;
1047 event.se_type = SCTP_AUTHENTICATION_EVENT;
1050 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
1051 sizeof(struct sctp_event));
1057 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
1058 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
1064 event.sctp_authentication_event = 1;
1067 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
1068 sizeof(struct sctp_event_subscribe));
1077 * Disable partial delivery by setting the min size larger than the max
1078 * record size of 2^14 + 2048 + 13
1081 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
1091 int BIO_dgram_is_sctp(BIO *bio)
1093 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
1096 static int dgram_sctp_new(BIO *bi)
1098 bio_dgram_sctp_data *data = NULL;
1102 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
1105 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
1106 # ifdef SCTP_PR_SCTP_NONE
1107 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1115 static int dgram_sctp_free(BIO *a)
1117 bio_dgram_sctp_data *data;
1121 if (!dgram_clear(a))
1124 data = (bio_dgram_sctp_data *) a->ptr;
1126 if (data->saved_message.data != NULL)
1127 OPENSSL_free(data->saved_message.data);
1134 # ifdef SCTP_AUTHENTICATION_EVENT
1135 void dgram_sctp_handle_auth_free_key_event(BIO *b,
1136 union sctp_notification *snp)
1139 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
1141 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
1142 struct sctp_authkeyid authkeyid;
1145 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1146 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1147 &authkeyid, sizeof(struct sctp_authkeyid));
1152 static int dgram_sctp_read(BIO *b, char *out, int outl)
1154 int ret = 0, n = 0, i, optval;
1156 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1157 union sctp_notification *snp;
1160 struct cmsghdr *cmsg;
1164 clear_socket_error();
1167 memset(&data->rcvinfo, 0x00,
1168 sizeof(struct bio_dgram_sctp_rcvinfo));
1171 msg.msg_name = NULL;
1172 msg.msg_namelen = 0;
1175 msg.msg_control = cmsgbuf;
1176 msg.msg_controllen = 512;
1178 n = recvmsg(b->num, &msg, 0);
1186 if (msg.msg_controllen > 0) {
1187 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1188 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1189 if (cmsg->cmsg_level != IPPROTO_SCTP)
1191 # ifdef SCTP_RCVINFO
1192 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1193 struct sctp_rcvinfo *rcvinfo;
1195 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1196 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1197 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1198 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1199 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1200 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1201 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1202 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1206 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1207 struct sctp_sndrcvinfo *sndrcvinfo;
1210 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1211 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1212 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1213 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1214 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1215 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1216 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1217 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1223 if (msg.msg_flags & MSG_NOTIFICATION) {
1224 snp = (union sctp_notification *)out;
1225 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1227 struct sctp_event event;
1229 struct sctp_event_subscribe event;
1230 socklen_t eventsize;
1233 * If a message has been delayed until the socket is dry,
1234 * it can be sent now.
1236 if (data->saved_message.length > 0) {
1237 dgram_sctp_write(data->saved_message.bio,
1238 data->saved_message.data,
1239 data->saved_message.length);
1240 OPENSSL_free(data->saved_message.data);
1241 data->saved_message.data = NULL;
1242 data->saved_message.length = 0;
1245 /* disable sender dry event */
1247 memset(&event, 0, sizeof(struct sctp_event));
1248 event.se_assoc_id = 0;
1249 event.se_type = SCTP_SENDER_DRY_EVENT;
1251 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1252 sizeof(struct sctp_event));
1258 eventsize = sizeof(struct sctp_event_subscribe);
1259 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1266 event.sctp_sender_dry_event = 0;
1268 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1269 sizeof(struct sctp_event_subscribe));
1276 # ifdef SCTP_AUTHENTICATION_EVENT
1277 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1278 dgram_sctp_handle_auth_free_key_event(b, snp);
1281 if (data->handle_notifications != NULL)
1282 data->handle_notifications(b, data->notification_context,
1285 memset(out, 0, outl);
1289 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1292 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1293 /* Partial message read, this should never happen! */
1296 * The buffer was too small, this means the peer sent a message
1297 * that was larger than allowed.
1303 * Test if socket buffer can handle max record size (2^14 + 2048
1306 optlen = (socklen_t) sizeof(int);
1307 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1309 OPENSSL_assert(optval >= 18445);
1312 * Test if SCTP doesn't partially deliver below max record size
1313 * (2^14 + 2048 + 13)
1315 optlen = (socklen_t) sizeof(int);
1317 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1320 OPENSSL_assert(optval >= 18445);
1323 * Partially delivered notification??? Probably a bug....
1325 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1328 * Everything seems ok till now, so it's most likely a message
1329 * dropped by PR-SCTP.
1331 memset(out, 0, outl);
1332 BIO_set_retry_read(b);
1336 BIO_clear_retry_flags(b);
1338 if (BIO_dgram_should_retry(ret)) {
1339 BIO_set_retry_read(b);
1340 data->_errno = get_last_socket_error();
1344 /* Test if peer uses SCTP-AUTH before continuing */
1345 if (!data->peer_auth_tested) {
1346 int ii, auth_data = 0, auth_forward = 0;
1348 struct sctp_authchunks *authchunks;
1351 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1352 authchunks = OPENSSL_malloc(optlen);
1353 memset(authchunks, 0, optlen);
1354 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1355 authchunks, &optlen);
1358 for (p = (unsigned char *)authchunks->gauth_chunks;
1359 p < (unsigned char *)authchunks + optlen;
1360 p += sizeof(uint8_t)) {
1361 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1363 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1367 OPENSSL_free(authchunks);
1369 if (!auth_data || !auth_forward) {
1370 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1374 data->peer_auth_tested = 1;
1380 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1383 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1384 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1385 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1386 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1387 struct iovec iov[1];
1389 struct cmsghdr *cmsg;
1390 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1391 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1392 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1393 struct sctp_sndinfo *sndinfo;
1394 struct sctp_prinfo *prinfo;
1396 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1397 struct sctp_sndrcvinfo *sndrcvinfo;
1400 clear_socket_error();
1403 * If we're send anything else than application data, disable all user
1404 * parameters and flags.
1407 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1408 # ifdef SCTP_SACK_IMMEDIATELY
1409 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1411 sinfo = &handshake_sinfo;
1415 * If we have to send a shutdown alert message and the socket is not dry
1416 * yet, we have to save it and send it as soon as the socket gets dry.
1418 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b)) {
1419 data->saved_message.bio = b;
1420 if (data->saved_message.data)
1421 OPENSSL_free(data->saved_message.data);
1422 data->saved_message.data = OPENSSL_malloc(inl);
1423 memcpy(data->saved_message.data, in, inl);
1424 data->saved_message.length = inl;
1428 iov[0].iov_base = (char *)in;
1429 iov[0].iov_len = inl;
1430 msg.msg_name = NULL;
1431 msg.msg_namelen = 0;
1434 msg.msg_control = (caddr_t) cmsgbuf;
1435 msg.msg_controllen = 0;
1437 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1438 cmsg = (struct cmsghdr *)cmsgbuf;
1439 cmsg->cmsg_level = IPPROTO_SCTP;
1440 cmsg->cmsg_type = SCTP_SNDINFO;
1441 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1442 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1443 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1444 sndinfo->snd_sid = sinfo->snd_sid;
1445 sndinfo->snd_flags = sinfo->snd_flags;
1446 sndinfo->snd_ppid = sinfo->snd_ppid;
1447 sndinfo->snd_context = sinfo->snd_context;
1448 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1451 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1452 cmsg->cmsg_level = IPPROTO_SCTP;
1453 cmsg->cmsg_type = SCTP_PRINFO;
1454 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1455 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1456 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1457 prinfo->pr_policy = pinfo->pr_policy;
1458 prinfo->pr_value = pinfo->pr_value;
1459 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1461 cmsg = (struct cmsghdr *)cmsgbuf;
1462 cmsg->cmsg_level = IPPROTO_SCTP;
1463 cmsg->cmsg_type = SCTP_SNDRCV;
1464 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1465 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1466 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1467 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1468 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1470 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1472 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1473 sndrcvinfo->sinfo_context = sinfo->snd_context;
1474 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1475 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1478 ret = sendmsg(b->num, &msg, 0);
1480 BIO_clear_retry_flags(b);
1482 if (BIO_dgram_should_retry(ret)) {
1483 BIO_set_retry_write(b);
1484 data->_errno = get_last_socket_error();
1490 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1493 bio_dgram_sctp_data *data = NULL;
1494 socklen_t sockopt_len = 0;
1495 struct sctp_authkeyid authkeyid;
1496 struct sctp_authkey *authkey = NULL;
1498 data = (bio_dgram_sctp_data *) b->ptr;
1501 case BIO_CTRL_DGRAM_QUERY_MTU:
1503 * Set to maximum (2^14) and ignore user input to enable transport
1504 * protocol fragmentation. Returns always 2^14.
1509 case BIO_CTRL_DGRAM_SET_MTU:
1511 * Set to maximum (2^14) and ignore input to enable transport
1512 * protocol fragmentation. Returns always 2^14.
1517 case BIO_CTRL_DGRAM_SET_CONNECTED:
1518 case BIO_CTRL_DGRAM_CONNECT:
1519 /* Returns always -1. */
1522 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1524 * SCTP doesn't need the DTLS timer Returns always 1.
1527 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1529 * We allow transport protocol fragmentation so this is irrelevant
1533 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1535 data->in_handshake = 1;
1537 data->in_handshake = 0;
1540 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1541 &data->in_handshake, sizeof(int));
1543 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1545 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1548 /* Get active key */
1549 sockopt_len = sizeof(struct sctp_authkeyid);
1551 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1557 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1558 authkey = OPENSSL_malloc(sockopt_len);
1559 if (authkey == NULL) {
1563 memset(authkey, 0x00, sockopt_len);
1564 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1565 # ifndef __FreeBSD__
1567 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1568 * and higher work without it.
1570 authkey->sca_keylength = 64;
1572 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1575 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1577 OPENSSL_free(authkey);
1582 /* Reset active key */
1583 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1584 &authkeyid, sizeof(struct sctp_authkeyid));
1589 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1590 /* Returns 0 on success, -1 otherwise. */
1592 /* Get active key */
1593 sockopt_len = sizeof(struct sctp_authkeyid);
1595 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1600 /* Set active key */
1601 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1602 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1603 &authkeyid, sizeof(struct sctp_authkeyid));
1608 * CCS has been sent, so remember that and fall through to check if
1609 * we need to deactivate an old key
1613 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1614 /* Returns 0 on success, -1 otherwise. */
1617 * Has this command really been called or is this just a
1620 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1624 * CSS has been both, received and sent, so deactivate an old key
1626 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1627 /* Get active key */
1628 sockopt_len = sizeof(struct sctp_authkeyid);
1630 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1631 &authkeyid, &sockopt_len);
1636 * Deactivate key or delete second last key if
1637 * SCTP_AUTHENTICATION_EVENT is not available.
1639 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1640 # ifdef SCTP_AUTH_DEACTIVATE_KEY
1641 sockopt_len = sizeof(struct sctp_authkeyid);
1642 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1643 &authkeyid, sockopt_len);
1647 # ifndef SCTP_AUTHENTICATION_EVENT
1648 if (authkeyid.scact_keynumber > 0) {
1649 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1650 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1651 &authkeyid, sizeof(struct sctp_authkeyid));
1661 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1662 /* Returns the size of the copied struct. */
1663 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1664 num = sizeof(struct bio_dgram_sctp_sndinfo);
1666 memcpy(ptr, &(data->sndinfo), num);
1669 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1670 /* Returns the size of the copied struct. */
1671 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1672 num = sizeof(struct bio_dgram_sctp_sndinfo);
1674 memcpy(&(data->sndinfo), ptr, num);
1676 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1677 /* Returns the size of the copied struct. */
1678 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1679 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1681 memcpy(ptr, &data->rcvinfo, num);
1685 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1686 /* Returns the size of the copied struct. */
1687 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1688 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1690 memcpy(&(data->rcvinfo), ptr, num);
1692 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1693 /* Returns the size of the copied struct. */
1694 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1695 num = sizeof(struct bio_dgram_sctp_prinfo);
1697 memcpy(ptr, &(data->prinfo), num);
1700 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1701 /* Returns the size of the copied struct. */
1702 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1703 num = sizeof(struct bio_dgram_sctp_prinfo);
1705 memcpy(&(data->prinfo), ptr, num);
1707 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1708 /* Returns always 1. */
1710 data->save_shutdown = 1;
1712 data->save_shutdown = 0;
1717 * Pass to default ctrl function to process SCTP unspecific commands
1719 ret = dgram_ctrl(b, cmd, num, ptr);
1725 int BIO_dgram_sctp_notification_cb(BIO *b,
1726 void (*handle_notifications) (BIO *bio,
1732 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1734 if (handle_notifications != NULL) {
1735 data->handle_notifications = handle_notifications;
1736 data->notification_context = context;
1743 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1746 int n, sockflags, ret;
1747 union sctp_notification snp;
1751 struct sctp_event event;
1753 struct sctp_event_subscribe event;
1754 socklen_t eventsize;
1756 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1758 /* set sender dry event */
1760 memset(&event, 0, sizeof(struct sctp_event));
1761 event.se_assoc_id = 0;
1762 event.se_type = SCTP_SENDER_DRY_EVENT;
1765 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1766 sizeof(struct sctp_event));
1768 eventsize = sizeof(struct sctp_event_subscribe);
1769 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1773 event.sctp_sender_dry_event = 1;
1776 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1777 sizeof(struct sctp_event_subscribe));
1782 /* peek for notification */
1783 memset(&snp, 0x00, sizeof(union sctp_notification));
1784 iov.iov_base = (char *)&snp;
1785 iov.iov_len = sizeof(union sctp_notification);
1786 msg.msg_name = NULL;
1787 msg.msg_namelen = 0;
1790 msg.msg_control = NULL;
1791 msg.msg_controllen = 0;
1794 n = recvmsg(b->num, &msg, MSG_PEEK);
1796 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1797 && (get_last_socket_error() != EWOULDBLOCK))
1803 /* if we find a notification, process it and try again if necessary */
1804 while (msg.msg_flags & MSG_NOTIFICATION) {
1805 memset(&snp, 0x00, sizeof(union sctp_notification));
1806 iov.iov_base = (char *)&snp;
1807 iov.iov_len = sizeof(union sctp_notification);
1808 msg.msg_name = NULL;
1809 msg.msg_namelen = 0;
1812 msg.msg_control = NULL;
1813 msg.msg_controllen = 0;
1816 n = recvmsg(b->num, &msg, 0);
1818 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1819 && (get_last_socket_error() != EWOULDBLOCK))
1825 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1828 /* disable sender dry event */
1830 memset(&event, 0, sizeof(struct sctp_event));
1831 event.se_assoc_id = 0;
1832 event.se_type = SCTP_SENDER_DRY_EVENT;
1835 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1836 sizeof(struct sctp_event));
1838 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1840 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1845 event.sctp_sender_dry_event = 0;
1848 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1849 sizeof(struct sctp_event_subscribe));
1854 # ifdef SCTP_AUTHENTICATION_EVENT
1855 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1856 dgram_sctp_handle_auth_free_key_event(b, &snp);
1859 if (data->handle_notifications != NULL)
1860 data->handle_notifications(b, data->notification_context,
1863 /* found notification, peek again */
1864 memset(&snp, 0x00, sizeof(union sctp_notification));
1865 iov.iov_base = (char *)&snp;
1866 iov.iov_len = sizeof(union sctp_notification);
1867 msg.msg_name = NULL;
1868 msg.msg_namelen = 0;
1871 msg.msg_control = NULL;
1872 msg.msg_controllen = 0;
1875 /* if we have seen the dry already, don't wait */
1877 sockflags = fcntl(b->num, F_GETFL, 0);
1878 fcntl(b->num, F_SETFL, O_NONBLOCK);
1881 n = recvmsg(b->num, &msg, MSG_PEEK);
1884 fcntl(b->num, F_SETFL, sockflags);
1888 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1889 && (get_last_socket_error() != EWOULDBLOCK))
1896 /* read anything else */
1900 int BIO_dgram_sctp_msg_waiting(BIO *b)
1903 union sctp_notification snp;
1906 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1908 /* Check if there are any messages waiting to be read */
1910 memset(&snp, 0x00, sizeof(union sctp_notification));
1911 iov.iov_base = (char *)&snp;
1912 iov.iov_len = sizeof(union sctp_notification);
1913 msg.msg_name = NULL;
1914 msg.msg_namelen = 0;
1917 msg.msg_control = NULL;
1918 msg.msg_controllen = 0;
1921 sockflags = fcntl(b->num, F_GETFL, 0);
1922 fcntl(b->num, F_SETFL, O_NONBLOCK);
1923 n = recvmsg(b->num, &msg, MSG_PEEK);
1924 fcntl(b->num, F_SETFL, sockflags);
1926 /* if notification, process and try again */
1927 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1928 # ifdef SCTP_AUTHENTICATION_EVENT
1929 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1930 dgram_sctp_handle_auth_free_key_event(b, &snp);
1933 memset(&snp, 0x00, sizeof(union sctp_notification));
1934 iov.iov_base = (char *)&snp;
1935 iov.iov_len = sizeof(union sctp_notification);
1936 msg.msg_name = NULL;
1937 msg.msg_namelen = 0;
1940 msg.msg_control = NULL;
1941 msg.msg_controllen = 0;
1943 n = recvmsg(b->num, &msg, 0);
1945 if (data->handle_notifications != NULL)
1946 data->handle_notifications(b, data->notification_context,
1950 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1952 /* Return 1 if there is a message to be read, return 0 otherwise. */
1959 static int dgram_sctp_puts(BIO *bp, const char *str)
1964 ret = dgram_sctp_write(bp, str, n);
1969 static int BIO_dgram_should_retry(int i)
1973 if ((i == 0) || (i == -1)) {
1974 err = get_last_socket_error();
1976 # if defined(OPENSSL_SYS_WINDOWS)
1978 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1979 * this point, the error code was overwritten by another system call
1980 * before this error handling is called.
1984 return (BIO_dgram_non_fatal_error(err));
1989 int BIO_dgram_non_fatal_error(int err)
1992 # if defined(OPENSSL_SYS_WINDOWS)
1993 # if defined(WSAEWOULDBLOCK)
1994 case WSAEWOULDBLOCK:
1997 # if 0 /* This appears to always be an error */
1998 # if defined(WSAENOTCONN)
2005 # ifdef WSAEWOULDBLOCK
2006 # if WSAEWOULDBLOCK != EWOULDBLOCK
2019 # if EWOULDBLOCK != EAGAIN
2044 static void get_current_time(struct timeval *t)
2046 # if defined(_WIN32)
2049 unsigned __int64 ul;
2054 SystemTimeToFileTime(&st, &now.ft);
2056 now.ul -= 116444736000000000ULL;
2058 now.ul -= 116444736000000000UI64; /* re-bias to 1/1/1970 */
2060 t->tv_sec = (long)(now.ul / 10000000);
2061 t->tv_usec = ((int)(now.ul % 10000000)) / 10;
2062 # elif defined(OPENSSL_SYS_VMS)
2065 t->tv_sec = (long)tb.time;
2066 t->tv_usec = (long)tb.millitm * 1000;
2068 gettimeofday(t, NULL);