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(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS)
69 # include <sys/timeb.h>
72 # ifndef OPENSSL_NO_SCTP
73 # include <netinet/sctp.h>
75 # define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
76 # define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
79 # if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
80 # define IP_MTU 14 /* linux is lame */
83 # if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
84 /* Standard definition causes type-punning problems. */
85 # undef IN6_IS_ADDR_V4MAPPED
86 # define s6_addr32 __u6_addr.__u6_addr32
87 # define IN6_IS_ADDR_V4MAPPED(a) \
88 (((a)->s6_addr32[0] == 0) && \
89 ((a)->s6_addr32[1] == 0) && \
90 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
94 # define sock_write SockWrite /* Watt-32 uses same names */
95 # define sock_read SockRead
96 # define sock_puts SockPuts
99 static int dgram_write(BIO *h, const char *buf, int num);
100 static int dgram_read(BIO *h, char *buf, int size);
101 static int dgram_puts(BIO *h, const char *str);
102 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
103 static int dgram_new(BIO *h);
104 static int dgram_free(BIO *data);
105 static int dgram_clear(BIO *bio);
107 # ifndef OPENSSL_NO_SCTP
108 static int dgram_sctp_write(BIO *h, const char *buf, int num);
109 static int dgram_sctp_read(BIO *h, char *buf, int size);
110 static int dgram_sctp_puts(BIO *h, const char *str);
111 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
112 static int dgram_sctp_new(BIO *h);
113 static int dgram_sctp_free(BIO *data);
114 # ifdef SCTP_AUTHENTICATION_EVENT
115 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification
120 static int BIO_dgram_should_retry(int s);
122 static void get_current_time(struct timeval *t);
124 static BIO_METHOD methods_dgramp = {
130 NULL, /* dgram_gets, */
137 # ifndef OPENSSL_NO_SCTP
138 static BIO_METHOD methods_dgramp_sctp = {
140 "datagram sctp socket",
144 NULL, /* dgram_gets, */
152 typedef struct bio_dgram_data_st {
155 struct sockaddr_in sa_in;
156 # if OPENSSL_USE_IPV6
157 struct sockaddr_in6 sa_in6;
160 unsigned int connected;
163 struct timeval next_timeout;
164 struct timeval socket_timeout;
167 # ifndef OPENSSL_NO_SCTP
168 typedef struct bio_dgram_sctp_save_message_st {
172 } bio_dgram_sctp_save_message;
174 typedef struct bio_dgram_sctp_data_st {
177 struct sockaddr_in sa_in;
178 # if OPENSSL_USE_IPV6
179 struct sockaddr_in6 sa_in6;
182 unsigned int connected;
185 struct bio_dgram_sctp_sndinfo sndinfo;
186 struct bio_dgram_sctp_rcvinfo rcvinfo;
187 struct bio_dgram_sctp_prinfo prinfo;
188 void (*handle_notifications) (BIO *bio, void *context, void *buf);
189 void *notification_context;
194 int peer_auth_tested;
195 bio_dgram_sctp_save_message saved_message;
196 } bio_dgram_sctp_data;
199 BIO_METHOD *BIO_s_datagram(void)
201 return (&methods_dgramp);
204 BIO *BIO_new_dgram(int fd, int close_flag)
208 ret = BIO_new(BIO_s_datagram());
211 BIO_set_fd(ret, fd, close_flag);
215 static int dgram_new(BIO *bi)
217 bio_dgram_data *data = NULL;
221 data = OPENSSL_malloc(sizeof(bio_dgram_data));
224 memset(data, 0x00, sizeof(bio_dgram_data));
231 static int dgram_free(BIO *a)
233 bio_dgram_data *data;
240 data = (bio_dgram_data *)a->ptr;
247 static int dgram_clear(BIO *a)
261 static void dgram_adjust_rcv_timeout(BIO *b)
263 # if defined(SO_RCVTIMEO)
264 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
272 /* Is a timer active? */
273 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
274 struct timeval timenow, timeleft;
276 /* Read current socket timeout */
277 # ifdef OPENSSL_SYS_WINDOWS
280 sz.i = sizeof(timeout);
281 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
282 (void *)&timeout, &sz.i) < 0) {
283 perror("getsockopt");
285 data->socket_timeout.tv_sec = timeout / 1000;
286 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
289 sz.i = sizeof(data->socket_timeout);
290 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
291 &(data->socket_timeout), (void *)&sz) < 0) {
292 perror("getsockopt");
293 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0)
294 OPENSSL_assert(sz.s <= sizeof(data->socket_timeout));
297 /* Get current time */
298 get_current_time(&timenow);
300 /* Calculate time left until timer expires */
301 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
302 timeleft.tv_sec -= timenow.tv_sec;
303 timeleft.tv_usec -= timenow.tv_usec;
304 if (timeleft.tv_usec < 0) {
306 timeleft.tv_usec += 1000000;
309 if (timeleft.tv_sec < 0) {
311 timeleft.tv_usec = 1;
315 * Adjust socket timeout if next handhake message timer will expire
318 if ((data->socket_timeout.tv_sec == 0
319 && data->socket_timeout.tv_usec == 0)
320 || (data->socket_timeout.tv_sec > timeleft.tv_sec)
321 || (data->socket_timeout.tv_sec == timeleft.tv_sec
322 && data->socket_timeout.tv_usec >= timeleft.tv_usec)) {
323 # ifdef OPENSSL_SYS_WINDOWS
324 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
325 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
326 (void *)&timeout, sizeof(timeout)) < 0) {
327 perror("setsockopt");
330 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
331 sizeof(struct timeval)) < 0) {
332 perror("setsockopt");
340 static void dgram_reset_rcv_timeout(BIO *b)
342 # if defined(SO_RCVTIMEO)
343 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
345 /* Is a timer active? */
346 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
347 # ifdef OPENSSL_SYS_WINDOWS
348 int timeout = data->socket_timeout.tv_sec * 1000 +
349 data->socket_timeout.tv_usec / 1000;
350 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
351 (void *)&timeout, sizeof(timeout)) < 0) {
352 perror("setsockopt");
356 (b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
357 sizeof(struct timeval)) < 0) {
358 perror("setsockopt");
365 static int dgram_read(BIO *b, char *out, int outl)
368 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
372 * See commentary in b_sock.c. <appro>
380 struct sockaddr_in sa_in;
381 # if OPENSSL_USE_IPV6
382 struct sockaddr_in6 sa_in6;
388 sa.len.i = sizeof(sa.peer);
391 clear_socket_error();
392 memset(&sa.peer, 0x00, sizeof(sa.peer));
393 dgram_adjust_rcv_timeout(b);
394 ret = recvfrom(b->num, out, outl, 0, &sa.peer.sa, (void *)&sa.len);
395 if (sizeof(sa.len.i) != sizeof(sa.len.s) && sa.len.i == 0) {
396 OPENSSL_assert(sa.len.s <= sizeof(sa.peer));
397 sa.len.i = (int)sa.len.s;
400 if (!data->connected && ret >= 0)
401 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
403 BIO_clear_retry_flags(b);
405 if (BIO_dgram_should_retry(ret)) {
406 BIO_set_retry_read(b);
407 data->_errno = get_last_socket_error();
411 dgram_reset_rcv_timeout(b);
416 static int dgram_write(BIO *b, const char *in, int inl)
419 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
420 clear_socket_error();
423 ret = writesocket(b->num, in, inl);
425 int peerlen = sizeof(data->peer);
427 if (data->peer.sa.sa_family == AF_INET)
428 peerlen = sizeof(data->peer.sa_in);
429 # if OPENSSL_USE_IPV6
430 else if (data->peer.sa.sa_family == AF_INET6)
431 peerlen = sizeof(data->peer.sa_in6);
433 # if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
434 ret = sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
436 ret = sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
440 BIO_clear_retry_flags(b);
442 if (BIO_dgram_should_retry(ret)) {
443 BIO_set_retry_write(b);
444 data->_errno = get_last_socket_error();
446 # if 0 /* higher layers are responsible for querying
447 * MTU, if necessary */
448 if (data->_errno == EMSGSIZE)
449 /* retrieve the new MTU */
450 BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
457 static long dgram_get_mtu_overhead(bio_dgram_data *data)
461 switch (data->peer.sa.sa_family) {
464 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
468 # if OPENSSL_USE_IPV6
470 # ifdef IN6_IS_ADDR_V4MAPPED
471 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
473 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
479 * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
485 /* We don't know. Go with the historical default */
492 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
496 struct sockaddr *to = NULL;
497 bio_dgram_data *data = NULL;
498 # 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 */
505 struct sockaddr_in s4;
506 # if OPENSSL_USE_IPV6
507 struct sockaddr_in6 s6;
512 data = (bio_dgram_data *)b->ptr;
517 case BIO_C_FILE_SEEK:
520 case BIO_C_FILE_TELL:
526 b->num = *((int *)ptr);
527 b->shutdown = (int)num;
539 case BIO_CTRL_GET_CLOSE:
542 case BIO_CTRL_SET_CLOSE:
543 b->shutdown = (int)num;
545 case BIO_CTRL_PENDING:
546 case BIO_CTRL_WPENDING:
553 case BIO_CTRL_DGRAM_CONNECT:
554 to = (struct sockaddr *)ptr;
556 if (connect(b->num, to, sizeof(struct sockaddr)) < 0) {
561 switch (to->sa_family) {
563 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
565 # if OPENSSL_USE_IPV6
567 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
571 memcpy(&data->peer, to, sizeof(data->peer.sa));
578 /* (Linux)kernel sets DF bit on outgoing IP packets */
579 case BIO_CTRL_DGRAM_MTU_DISCOVER:
580 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
581 addr_len = (socklen_t) sizeof(addr);
582 memset((void *)&addr, 0, sizeof(addr));
583 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
587 switch (addr.sa.sa_family) {
589 sockopt_val = IP_PMTUDISC_DO;
590 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
591 &sockopt_val, sizeof(sockopt_val))) < 0)
592 perror("setsockopt");
594 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
596 sockopt_val = IPV6_PMTUDISC_DO;
597 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
598 &sockopt_val, sizeof(sockopt_val))) < 0)
599 perror("setsockopt");
610 case BIO_CTRL_DGRAM_QUERY_MTU:
611 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
612 addr_len = (socklen_t) sizeof(addr);
613 memset((void *)&addr, 0, sizeof(addr));
614 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
618 sockopt_len = sizeof(sockopt_val);
619 switch (addr.sa.sa_family) {
622 getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
623 &sockopt_len)) < 0 || sockopt_val < 0) {
627 * we assume that the transport protocol is UDP and no IP
630 data->mtu = sockopt_val - 8 - 20;
634 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
637 getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
638 (void *)&sockopt_val, &sockopt_len)) < 0
639 || sockopt_val < 0) {
643 * we assume that the transport protocol is UDP and no IPV6
646 data->mtu = sockopt_val - 8 - 40;
659 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
660 ret = -dgram_get_mtu_overhead(data);
661 switch (data->peer.sa.sa_family) {
665 # if OPENSSL_USE_IPV6
667 # ifdef IN6_IS_ADDR_V4MAPPED
668 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
680 case BIO_CTRL_DGRAM_GET_MTU:
683 case BIO_CTRL_DGRAM_SET_MTU:
687 case BIO_CTRL_DGRAM_SET_CONNECTED:
688 to = (struct sockaddr *)ptr;
692 switch (to->sa_family) {
694 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
696 # if OPENSSL_USE_IPV6
698 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
702 memcpy(&data->peer, to, sizeof(data->peer.sa));
707 memset(&(data->peer), 0x00, sizeof(data->peer));
710 case BIO_CTRL_DGRAM_GET_PEER:
711 switch (data->peer.sa.sa_family) {
713 ret = sizeof(data->peer.sa_in);
715 # if OPENSSL_USE_IPV6
717 ret = sizeof(data->peer.sa_in6);
721 ret = sizeof(data->peer.sa);
724 if (num == 0 || num > ret)
726 memcpy(ptr, &data->peer, (ret = num));
728 case BIO_CTRL_DGRAM_SET_PEER:
729 to = (struct sockaddr *)ptr;
730 switch (to->sa_family) {
732 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
734 # if OPENSSL_USE_IPV6
736 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
740 memcpy(&data->peer, to, sizeof(data->peer.sa));
744 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
745 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
747 # if defined(SO_RCVTIMEO)
748 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
749 # ifdef OPENSSL_SYS_WINDOWS
751 struct timeval *tv = (struct timeval *)ptr;
752 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
753 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
754 (void *)&timeout, sizeof(timeout)) < 0) {
755 perror("setsockopt");
760 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
761 sizeof(struct timeval)) < 0) {
762 perror("setsockopt");
767 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
775 # ifdef OPENSSL_SYS_WINDOWS
777 struct timeval *tv = (struct timeval *)ptr;
779 sz.i = sizeof(timeout);
780 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
781 (void *)&timeout, &sz.i) < 0) {
782 perror("getsockopt");
785 tv->tv_sec = timeout / 1000;
786 tv->tv_usec = (timeout % 1000) * 1000;
790 sz.i = sizeof(struct timeval);
791 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
792 ptr, (void *)&sz) < 0) {
793 perror("getsockopt");
795 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
796 OPENSSL_assert(sz.s <= sizeof(struct timeval));
804 # if defined(SO_SNDTIMEO)
805 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
806 # ifdef OPENSSL_SYS_WINDOWS
808 struct timeval *tv = (struct timeval *)ptr;
809 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
810 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
811 (void *)&timeout, sizeof(timeout)) < 0) {
812 perror("setsockopt");
817 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
818 sizeof(struct timeval)) < 0) {
819 perror("setsockopt");
824 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
832 # ifdef OPENSSL_SYS_WINDOWS
834 struct timeval *tv = (struct timeval *)ptr;
836 sz.i = sizeof(timeout);
837 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
838 (void *)&timeout, &sz.i) < 0) {
839 perror("getsockopt");
842 tv->tv_sec = timeout / 1000;
843 tv->tv_usec = (timeout % 1000) * 1000;
847 sz.i = sizeof(struct timeval);
848 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
849 ptr, (void *)&sz) < 0) {
850 perror("getsockopt");
852 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
853 OPENSSL_assert(sz.s <= sizeof(struct timeval));
861 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
863 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
864 # ifdef OPENSSL_SYS_WINDOWS
865 if (data->_errno == WSAETIMEDOUT)
867 if (data->_errno == EAGAIN)
876 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
877 if (data->_errno == EMSGSIZE) {
884 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
885 ret = dgram_get_mtu_overhead(data);
894 static int dgram_puts(BIO *bp, const char *str)
899 ret = dgram_write(bp, str, n);
903 # ifndef OPENSSL_NO_SCTP
904 BIO_METHOD *BIO_s_datagram_sctp(void)
906 return (&methods_dgramp_sctp);
909 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
912 int ret, optval = 20000;
913 int auth_data = 0, auth_forward = 0;
915 struct sctp_authchunk auth;
916 struct sctp_authchunks *authchunks;
917 socklen_t sockopt_len;
918 # ifdef SCTP_AUTHENTICATION_EVENT
920 struct sctp_event event;
922 struct sctp_event_subscribe event;
926 bio = BIO_new(BIO_s_datagram_sctp());
929 BIO_set_fd(bio, fd, close_flag);
931 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
932 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
934 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
935 sizeof(struct sctp_authchunk));
940 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
942 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
943 sizeof(struct sctp_authchunk));
950 * Test if activation was successful. When using accept(), SCTP-AUTH has
951 * to be activated for the listening socket already, otherwise the
952 * connected socket won't use it.
954 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
955 authchunks = OPENSSL_malloc(sockopt_len);
960 memset(authchunks, 0, sizeof(sockopt_len));
962 getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
966 OPENSSL_free(authchunks);
971 for (p = (unsigned char *)authchunks->gauth_chunks;
972 p < (unsigned char *)authchunks + sockopt_len;
973 p += sizeof(uint8_t)) {
974 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
976 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
980 OPENSSL_free(authchunks);
982 OPENSSL_assert(auth_data);
983 OPENSSL_assert(auth_forward);
985 # ifdef SCTP_AUTHENTICATION_EVENT
987 memset(&event, 0, sizeof(struct sctp_event));
988 event.se_assoc_id = 0;
989 event.se_type = SCTP_AUTHENTICATION_EVENT;
992 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
993 sizeof(struct sctp_event));
999 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
1000 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
1006 event.sctp_authentication_event = 1;
1009 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
1010 sizeof(struct sctp_event_subscribe));
1019 * Disable partial delivery by setting the min size larger than the max
1020 * record size of 2^14 + 2048 + 13
1023 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
1033 int BIO_dgram_is_sctp(BIO *bio)
1035 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
1038 static int dgram_sctp_new(BIO *bi)
1040 bio_dgram_sctp_data *data = NULL;
1044 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
1047 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
1048 # ifdef SCTP_PR_SCTP_NONE
1049 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1057 static int dgram_sctp_free(BIO *a)
1059 bio_dgram_sctp_data *data;
1063 if (!dgram_clear(a))
1066 data = (bio_dgram_sctp_data *) a->ptr;
1068 if (data->saved_message.data != NULL)
1069 OPENSSL_free(data->saved_message.data);
1076 # ifdef SCTP_AUTHENTICATION_EVENT
1077 void dgram_sctp_handle_auth_free_key_event(BIO *b,
1078 union sctp_notification *snp)
1081 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
1083 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
1084 struct sctp_authkeyid authkeyid;
1087 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1088 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1089 &authkeyid, sizeof(struct sctp_authkeyid));
1094 static int dgram_sctp_read(BIO *b, char *out, int outl)
1096 int ret = 0, n = 0, i, optval;
1098 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1099 union sctp_notification *snp;
1102 struct cmsghdr *cmsg;
1106 clear_socket_error();
1109 memset(&data->rcvinfo, 0x00,
1110 sizeof(struct bio_dgram_sctp_rcvinfo));
1113 msg.msg_name = NULL;
1114 msg.msg_namelen = 0;
1117 msg.msg_control = cmsgbuf;
1118 msg.msg_controllen = 512;
1120 n = recvmsg(b->num, &msg, 0);
1128 if (msg.msg_controllen > 0) {
1129 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1130 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1131 if (cmsg->cmsg_level != IPPROTO_SCTP)
1133 # ifdef SCTP_RCVINFO
1134 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1135 struct sctp_rcvinfo *rcvinfo;
1137 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1138 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1139 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1140 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1141 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1142 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1143 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1144 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1148 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1149 struct sctp_sndrcvinfo *sndrcvinfo;
1152 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1153 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1154 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1155 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1156 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1157 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1158 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1159 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1165 if (msg.msg_flags & MSG_NOTIFICATION) {
1166 snp = (union sctp_notification *)out;
1167 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1169 struct sctp_event event;
1171 struct sctp_event_subscribe event;
1172 socklen_t eventsize;
1175 * If a message has been delayed until the socket is dry,
1176 * it can be sent now.
1178 if (data->saved_message.length > 0) {
1179 dgram_sctp_write(data->saved_message.bio,
1180 data->saved_message.data,
1181 data->saved_message.length);
1182 OPENSSL_free(data->saved_message.data);
1183 data->saved_message.data = NULL;
1184 data->saved_message.length = 0;
1187 /* disable sender dry event */
1189 memset(&event, 0, sizeof(struct sctp_event));
1190 event.se_assoc_id = 0;
1191 event.se_type = SCTP_SENDER_DRY_EVENT;
1193 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1194 sizeof(struct sctp_event));
1200 eventsize = sizeof(struct sctp_event_subscribe);
1201 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1208 event.sctp_sender_dry_event = 0;
1210 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1211 sizeof(struct sctp_event_subscribe));
1218 # ifdef SCTP_AUTHENTICATION_EVENT
1219 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1220 dgram_sctp_handle_auth_free_key_event(b, snp);
1223 if (data->handle_notifications != NULL)
1224 data->handle_notifications(b, data->notification_context,
1227 memset(out, 0, outl);
1231 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1234 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1235 /* Partial message read, this should never happen! */
1238 * The buffer was too small, this means the peer sent a message
1239 * that was larger than allowed.
1245 * Test if socket buffer can handle max record size (2^14 + 2048
1248 optlen = (socklen_t) sizeof(int);
1249 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1251 OPENSSL_assert(optval >= 18445);
1254 * Test if SCTP doesn't partially deliver below max record size
1255 * (2^14 + 2048 + 13)
1257 optlen = (socklen_t) sizeof(int);
1259 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1262 OPENSSL_assert(optval >= 18445);
1265 * Partially delivered notification??? Probably a bug....
1267 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1270 * Everything seems ok till now, so it's most likely a message
1271 * dropped by PR-SCTP.
1273 memset(out, 0, outl);
1274 BIO_set_retry_read(b);
1278 BIO_clear_retry_flags(b);
1280 if (BIO_dgram_should_retry(ret)) {
1281 BIO_set_retry_read(b);
1282 data->_errno = get_last_socket_error();
1286 /* Test if peer uses SCTP-AUTH before continuing */
1287 if (!data->peer_auth_tested) {
1288 int ii, auth_data = 0, auth_forward = 0;
1290 struct sctp_authchunks *authchunks;
1293 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1294 authchunks = OPENSSL_malloc(optlen);
1296 BIOerr(BIO_F_DGRAM_SCTP_READ, ERR_R_MALLOC_FAILURE);
1299 memset(authchunks, 0, sizeof(optlen));
1300 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1301 authchunks, &optlen);
1304 for (p = (unsigned char *)authchunks->gauth_chunks;
1305 p < (unsigned char *)authchunks + optlen;
1306 p += sizeof(uint8_t)) {
1307 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1309 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1313 OPENSSL_free(authchunks);
1315 if (!auth_data || !auth_forward) {
1316 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1320 data->peer_auth_tested = 1;
1326 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1329 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1330 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1331 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1332 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1333 struct iovec iov[1];
1335 struct cmsghdr *cmsg;
1336 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1337 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1338 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1339 struct sctp_sndinfo *sndinfo;
1340 struct sctp_prinfo *prinfo;
1342 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1343 struct sctp_sndrcvinfo *sndrcvinfo;
1346 clear_socket_error();
1349 * If we're send anything else than application data, disable all user
1350 * parameters and flags.
1353 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1354 # ifdef SCTP_SACK_IMMEDIATELY
1355 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1357 sinfo = &handshake_sinfo;
1361 * If we have to send a shutdown alert message and the socket is not dry
1362 * yet, we have to save it and send it as soon as the socket gets dry.
1364 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b)) {
1366 data->saved_message.bio = b;
1367 if(!(tmp = OPENSSL_malloc(inl))) {
1368 BIOerr(BIO_F_DGRAM_SCTP_WRITE, ERR_R_MALLOC_FAILURE);
1371 if (data->saved_message.data)
1372 OPENSSL_free(data->saved_message.data);
1373 data->saved_message.data = tmp;
1374 memcpy(data->saved_message.data, in, inl);
1375 data->saved_message.length = inl;
1379 iov[0].iov_base = (char *)in;
1380 iov[0].iov_len = inl;
1381 msg.msg_name = NULL;
1382 msg.msg_namelen = 0;
1385 msg.msg_control = (caddr_t) cmsgbuf;
1386 msg.msg_controllen = 0;
1388 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1389 cmsg = (struct cmsghdr *)cmsgbuf;
1390 cmsg->cmsg_level = IPPROTO_SCTP;
1391 cmsg->cmsg_type = SCTP_SNDINFO;
1392 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1393 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1394 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1395 sndinfo->snd_sid = sinfo->snd_sid;
1396 sndinfo->snd_flags = sinfo->snd_flags;
1397 sndinfo->snd_ppid = sinfo->snd_ppid;
1398 sndinfo->snd_context = sinfo->snd_context;
1399 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1402 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1403 cmsg->cmsg_level = IPPROTO_SCTP;
1404 cmsg->cmsg_type = SCTP_PRINFO;
1405 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1406 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1407 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1408 prinfo->pr_policy = pinfo->pr_policy;
1409 prinfo->pr_value = pinfo->pr_value;
1410 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1412 cmsg = (struct cmsghdr *)cmsgbuf;
1413 cmsg->cmsg_level = IPPROTO_SCTP;
1414 cmsg->cmsg_type = SCTP_SNDRCV;
1415 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1416 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1417 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1418 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1419 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1421 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1423 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1424 sndrcvinfo->sinfo_context = sinfo->snd_context;
1425 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1426 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1429 ret = sendmsg(b->num, &msg, 0);
1431 BIO_clear_retry_flags(b);
1433 if (BIO_dgram_should_retry(ret)) {
1434 BIO_set_retry_write(b);
1435 data->_errno = get_last_socket_error();
1441 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1444 bio_dgram_sctp_data *data = NULL;
1445 socklen_t sockopt_len = 0;
1446 struct sctp_authkeyid authkeyid;
1447 struct sctp_authkey *authkey = NULL;
1449 data = (bio_dgram_sctp_data *) b->ptr;
1452 case BIO_CTRL_DGRAM_QUERY_MTU:
1454 * Set to maximum (2^14) and ignore user input to enable transport
1455 * protocol fragmentation. Returns always 2^14.
1460 case BIO_CTRL_DGRAM_SET_MTU:
1462 * Set to maximum (2^14) and ignore input to enable transport
1463 * protocol fragmentation. Returns always 2^14.
1468 case BIO_CTRL_DGRAM_SET_CONNECTED:
1469 case BIO_CTRL_DGRAM_CONNECT:
1470 /* Returns always -1. */
1473 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1475 * SCTP doesn't need the DTLS timer Returns always 1.
1478 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1480 * We allow transport protocol fragmentation so this is irrelevant
1484 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1486 data->in_handshake = 1;
1488 data->in_handshake = 0;
1491 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1492 &data->in_handshake, sizeof(int));
1494 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1496 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1499 /* Get active key */
1500 sockopt_len = sizeof(struct sctp_authkeyid);
1502 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1508 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1509 authkey = OPENSSL_malloc(sockopt_len);
1510 if (authkey == NULL) {
1514 memset(authkey, 0x00, sockopt_len);
1515 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1516 # ifndef __FreeBSD__
1518 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1519 * and higher work without it.
1521 authkey->sca_keylength = 64;
1523 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1526 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1528 OPENSSL_free(authkey);
1533 /* Reset active key */
1534 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1535 &authkeyid, sizeof(struct sctp_authkeyid));
1540 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1541 /* Returns 0 on success, -1 otherwise. */
1543 /* Get active key */
1544 sockopt_len = sizeof(struct sctp_authkeyid);
1546 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1551 /* Set active key */
1552 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1553 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1554 &authkeyid, sizeof(struct sctp_authkeyid));
1559 * CCS has been sent, so remember that and fall through to check if
1560 * we need to deactivate an old key
1564 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1565 /* Returns 0 on success, -1 otherwise. */
1568 * Has this command really been called or is this just a
1571 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1575 * CSS has been both, received and sent, so deactivate an old key
1577 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1578 /* Get active key */
1579 sockopt_len = sizeof(struct sctp_authkeyid);
1581 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1582 &authkeyid, &sockopt_len);
1587 * Deactivate key or delete second last key if
1588 * SCTP_AUTHENTICATION_EVENT is not available.
1590 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1591 # ifdef SCTP_AUTH_DEACTIVATE_KEY
1592 sockopt_len = sizeof(struct sctp_authkeyid);
1593 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1594 &authkeyid, sockopt_len);
1598 # ifndef SCTP_AUTHENTICATION_EVENT
1599 if (authkeyid.scact_keynumber > 0) {
1600 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1601 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1602 &authkeyid, sizeof(struct sctp_authkeyid));
1612 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1613 /* Returns the size of the copied struct. */
1614 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1615 num = sizeof(struct bio_dgram_sctp_sndinfo);
1617 memcpy(ptr, &(data->sndinfo), num);
1620 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1621 /* Returns the size of the copied struct. */
1622 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1623 num = sizeof(struct bio_dgram_sctp_sndinfo);
1625 memcpy(&(data->sndinfo), ptr, num);
1627 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1628 /* Returns the size of the copied struct. */
1629 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1630 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1632 memcpy(ptr, &data->rcvinfo, num);
1636 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1637 /* Returns the size of the copied struct. */
1638 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1639 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1641 memcpy(&(data->rcvinfo), ptr, num);
1643 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1644 /* Returns the size of the copied struct. */
1645 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1646 num = sizeof(struct bio_dgram_sctp_prinfo);
1648 memcpy(ptr, &(data->prinfo), num);
1651 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1652 /* Returns the size of the copied struct. */
1653 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1654 num = sizeof(struct bio_dgram_sctp_prinfo);
1656 memcpy(&(data->prinfo), ptr, num);
1658 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1659 /* Returns always 1. */
1661 data->save_shutdown = 1;
1663 data->save_shutdown = 0;
1668 * Pass to default ctrl function to process SCTP unspecific commands
1670 ret = dgram_ctrl(b, cmd, num, ptr);
1676 int BIO_dgram_sctp_notification_cb(BIO *b,
1677 void (*handle_notifications) (BIO *bio,
1683 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1685 if (handle_notifications != NULL) {
1686 data->handle_notifications = handle_notifications;
1687 data->notification_context = context;
1694 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1697 int n, sockflags, ret;
1698 union sctp_notification snp;
1702 struct sctp_event event;
1704 struct sctp_event_subscribe event;
1705 socklen_t eventsize;
1707 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1709 /* set sender dry event */
1711 memset(&event, 0, sizeof(struct sctp_event));
1712 event.se_assoc_id = 0;
1713 event.se_type = SCTP_SENDER_DRY_EVENT;
1716 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1717 sizeof(struct sctp_event));
1719 eventsize = sizeof(struct sctp_event_subscribe);
1720 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1724 event.sctp_sender_dry_event = 1;
1727 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1728 sizeof(struct sctp_event_subscribe));
1733 /* peek for notification */
1734 memset(&snp, 0x00, sizeof(union sctp_notification));
1735 iov.iov_base = (char *)&snp;
1736 iov.iov_len = sizeof(union sctp_notification);
1737 msg.msg_name = NULL;
1738 msg.msg_namelen = 0;
1741 msg.msg_control = NULL;
1742 msg.msg_controllen = 0;
1745 n = recvmsg(b->num, &msg, MSG_PEEK);
1747 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1748 && (get_last_socket_error() != EWOULDBLOCK))
1754 /* if we find a notification, process it and try again if necessary */
1755 while (msg.msg_flags & MSG_NOTIFICATION) {
1756 memset(&snp, 0x00, sizeof(union sctp_notification));
1757 iov.iov_base = (char *)&snp;
1758 iov.iov_len = sizeof(union sctp_notification);
1759 msg.msg_name = NULL;
1760 msg.msg_namelen = 0;
1763 msg.msg_control = NULL;
1764 msg.msg_controllen = 0;
1767 n = recvmsg(b->num, &msg, 0);
1769 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1770 && (get_last_socket_error() != EWOULDBLOCK))
1776 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1779 /* disable sender dry event */
1781 memset(&event, 0, sizeof(struct sctp_event));
1782 event.se_assoc_id = 0;
1783 event.se_type = SCTP_SENDER_DRY_EVENT;
1786 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1787 sizeof(struct sctp_event));
1789 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1791 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1796 event.sctp_sender_dry_event = 0;
1799 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1800 sizeof(struct sctp_event_subscribe));
1805 # ifdef SCTP_AUTHENTICATION_EVENT
1806 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1807 dgram_sctp_handle_auth_free_key_event(b, &snp);
1810 if (data->handle_notifications != NULL)
1811 data->handle_notifications(b, data->notification_context,
1814 /* found notification, peek again */
1815 memset(&snp, 0x00, sizeof(union sctp_notification));
1816 iov.iov_base = (char *)&snp;
1817 iov.iov_len = sizeof(union sctp_notification);
1818 msg.msg_name = NULL;
1819 msg.msg_namelen = 0;
1822 msg.msg_control = NULL;
1823 msg.msg_controllen = 0;
1826 /* if we have seen the dry already, don't wait */
1828 sockflags = fcntl(b->num, F_GETFL, 0);
1829 fcntl(b->num, F_SETFL, O_NONBLOCK);
1832 n = recvmsg(b->num, &msg, MSG_PEEK);
1835 fcntl(b->num, F_SETFL, sockflags);
1839 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1840 && (get_last_socket_error() != EWOULDBLOCK))
1847 /* read anything else */
1851 int BIO_dgram_sctp_msg_waiting(BIO *b)
1854 union sctp_notification snp;
1857 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1859 /* Check if there are any messages waiting to be read */
1861 memset(&snp, 0x00, sizeof(union sctp_notification));
1862 iov.iov_base = (char *)&snp;
1863 iov.iov_len = sizeof(union sctp_notification);
1864 msg.msg_name = NULL;
1865 msg.msg_namelen = 0;
1868 msg.msg_control = NULL;
1869 msg.msg_controllen = 0;
1872 sockflags = fcntl(b->num, F_GETFL, 0);
1873 fcntl(b->num, F_SETFL, O_NONBLOCK);
1874 n = recvmsg(b->num, &msg, MSG_PEEK);
1875 fcntl(b->num, F_SETFL, sockflags);
1877 /* if notification, process and try again */
1878 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1879 # ifdef SCTP_AUTHENTICATION_EVENT
1880 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1881 dgram_sctp_handle_auth_free_key_event(b, &snp);
1884 memset(&snp, 0x00, sizeof(union sctp_notification));
1885 iov.iov_base = (char *)&snp;
1886 iov.iov_len = sizeof(union sctp_notification);
1887 msg.msg_name = NULL;
1888 msg.msg_namelen = 0;
1891 msg.msg_control = NULL;
1892 msg.msg_controllen = 0;
1894 n = recvmsg(b->num, &msg, 0);
1896 if (data->handle_notifications != NULL)
1897 data->handle_notifications(b, data->notification_context,
1901 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1903 /* Return 1 if there is a message to be read, return 0 otherwise. */
1910 static int dgram_sctp_puts(BIO *bp, const char *str)
1915 ret = dgram_sctp_write(bp, str, n);
1920 static int BIO_dgram_should_retry(int i)
1924 if ((i == 0) || (i == -1)) {
1925 err = get_last_socket_error();
1927 # if defined(OPENSSL_SYS_WINDOWS)
1929 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1930 * this point, the error code was overwritten by another system call
1931 * before this error handling is called.
1935 return (BIO_dgram_non_fatal_error(err));
1940 int BIO_dgram_non_fatal_error(int err)
1943 # if defined(OPENSSL_SYS_WINDOWS)
1944 # if defined(WSAEWOULDBLOCK)
1945 case WSAEWOULDBLOCK:
1948 # if 0 /* This appears to always be an error */
1949 # if defined(WSAENOTCONN)
1956 # ifdef WSAEWOULDBLOCK
1957 # if WSAEWOULDBLOCK != EWOULDBLOCK
1970 # if EWOULDBLOCK != EAGAIN
1995 static void get_current_time(struct timeval *t)
1997 # ifdef OPENSSL_SYS_WIN32
2000 t->tv_sec = (long)tb.time;
2001 t->tv_usec = (long)tb.millitm * 1000;
2002 # elif defined(OPENSSL_SYS_VMS)
2005 t->tv_sec = (long)tb.time;
2006 t->tv_usec = (long)tb.millitm * 1000;
2008 gettimeofday(t, NULL);