2 * Copyright 2005-2017 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
14 #ifndef OPENSSL_NO_DGRAM
16 # ifndef OPENSSL_NO_SCTP
17 # include <netinet/sctp.h>
19 # define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
20 # define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
23 # if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
24 # define IP_MTU 14 /* linux is lame */
27 # if OPENSSL_USE_IPV6 && !defined(IPPROTO_IPV6)
28 # define IPPROTO_IPV6 41 /* windows is lame */
31 # if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
32 /* Standard definition causes type-punning problems. */
33 # undef IN6_IS_ADDR_V4MAPPED
34 # define s6_addr32 __u6_addr.__u6_addr32
35 # define IN6_IS_ADDR_V4MAPPED(a) \
36 (((a)->s6_addr32[0] == 0) && \
37 ((a)->s6_addr32[1] == 0) && \
38 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
41 static int dgram_write(BIO *h, const char *buf, int num);
42 static int dgram_read(BIO *h, char *buf, int size);
43 static int dgram_puts(BIO *h, const char *str);
44 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
45 static int dgram_new(BIO *h);
46 static int dgram_free(BIO *data);
47 static int dgram_clear(BIO *bio);
49 # ifndef OPENSSL_NO_SCTP
50 static int dgram_sctp_write(BIO *h, const char *buf, int num);
51 static int dgram_sctp_read(BIO *h, char *buf, int size);
52 static int dgram_sctp_puts(BIO *h, const char *str);
53 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
54 static int dgram_sctp_new(BIO *h);
55 static int dgram_sctp_free(BIO *data);
56 # ifdef SCTP_AUTHENTICATION_EVENT
57 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification
62 static int BIO_dgram_should_retry(int s);
64 static void get_current_time(struct timeval *t);
66 static const BIO_METHOD methods_dgramp = {
69 /* TODO: Convert to new style write function */
72 /* TODO: Convert to new style read function */
76 NULL, /* dgram_gets, */
83 # ifndef OPENSSL_NO_SCTP
84 static const BIO_METHOD methods_dgramp_sctp = {
86 "datagram sctp socket",
87 /* TODO: Convert to new style write function */
90 /* TODO: Convert to new style write function */
94 NULL, /* dgram_gets, */
102 typedef struct bio_dgram_data_st {
104 unsigned int connected;
107 struct timeval next_timeout;
108 struct timeval socket_timeout;
109 unsigned int peekmode;
112 # ifndef OPENSSL_NO_SCTP
113 typedef struct bio_dgram_sctp_save_message_st {
117 } bio_dgram_sctp_save_message;
119 typedef struct bio_dgram_sctp_data_st {
121 unsigned int connected;
124 struct bio_dgram_sctp_sndinfo sndinfo;
125 struct bio_dgram_sctp_rcvinfo rcvinfo;
126 struct bio_dgram_sctp_prinfo prinfo;
127 void (*handle_notifications) (BIO *bio, void *context, void *buf);
128 void *notification_context;
133 int peer_auth_tested;
134 } bio_dgram_sctp_data;
137 const BIO_METHOD *BIO_s_datagram(void)
139 return (&methods_dgramp);
142 BIO *BIO_new_dgram(int fd, int close_flag)
146 ret = BIO_new(BIO_s_datagram());
149 BIO_set_fd(ret, fd, close_flag);
153 static int dgram_new(BIO *bi)
155 bio_dgram_data *data = OPENSSL_zalloc(sizeof(*data));
163 static int dgram_free(BIO *a)
165 bio_dgram_data *data;
172 data = (bio_dgram_data *)a->ptr;
178 static int dgram_clear(BIO *a)
184 BIO_closesocket(a->num);
192 static void dgram_adjust_rcv_timeout(BIO *b)
194 # if defined(SO_RCVTIMEO)
195 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
203 /* Is a timer active? */
204 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
205 struct timeval timenow, timeleft;
207 /* Read current socket timeout */
208 # ifdef OPENSSL_SYS_WINDOWS
211 sz.i = sizeof(timeout);
212 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
213 (void *)&timeout, &sz.i) < 0) {
214 perror("getsockopt");
216 data->socket_timeout.tv_sec = timeout / 1000;
217 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
220 sz.i = sizeof(data->socket_timeout);
221 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
222 &(data->socket_timeout), (void *)&sz) < 0) {
223 perror("getsockopt");
224 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0)
225 OPENSSL_assert(sz.s <= sizeof(data->socket_timeout));
228 /* Get current time */
229 get_current_time(&timenow);
231 /* Calculate time left until timer expires */
232 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
233 if (timeleft.tv_usec < timenow.tv_usec) {
234 timeleft.tv_usec = 1000000 - timenow.tv_usec + timeleft.tv_usec;
237 timeleft.tv_usec -= timenow.tv_usec;
239 if (timeleft.tv_sec < timenow.tv_sec) {
241 timeleft.tv_usec = 1;
243 timeleft.tv_sec -= timenow.tv_sec;
247 * Adjust socket timeout if next handshake message timer will expire
250 if ((data->socket_timeout.tv_sec == 0
251 && data->socket_timeout.tv_usec == 0)
252 || (data->socket_timeout.tv_sec > timeleft.tv_sec)
253 || (data->socket_timeout.tv_sec == timeleft.tv_sec
254 && data->socket_timeout.tv_usec >= timeleft.tv_usec)) {
255 # ifdef OPENSSL_SYS_WINDOWS
256 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
257 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
258 (void *)&timeout, sizeof(timeout)) < 0) {
259 perror("setsockopt");
262 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
263 sizeof(struct timeval)) < 0) {
264 perror("setsockopt");
272 static void dgram_reset_rcv_timeout(BIO *b)
274 # if defined(SO_RCVTIMEO)
275 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
277 /* Is a timer active? */
278 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
279 # ifdef OPENSSL_SYS_WINDOWS
280 int timeout = data->socket_timeout.tv_sec * 1000 +
281 data->socket_timeout.tv_usec / 1000;
282 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
283 (void *)&timeout, sizeof(timeout)) < 0) {
284 perror("setsockopt");
288 (b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
289 sizeof(struct timeval)) < 0) {
290 perror("setsockopt");
297 static int dgram_read(BIO *b, char *out, int outl)
300 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
304 socklen_t len = sizeof(peer);
307 clear_socket_error();
308 memset(&peer, 0, sizeof(peer));
309 dgram_adjust_rcv_timeout(b);
312 ret = recvfrom(b->num, out, outl, flags,
313 BIO_ADDR_sockaddr_noconst(&peer), &len);
315 if (!data->connected && ret >= 0)
316 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &peer);
318 BIO_clear_retry_flags(b);
320 if (BIO_dgram_should_retry(ret)) {
321 BIO_set_retry_read(b);
322 data->_errno = get_last_socket_error();
326 dgram_reset_rcv_timeout(b);
331 static int dgram_write(BIO *b, const char *in, int inl)
334 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
335 clear_socket_error();
338 ret = writesocket(b->num, in, inl);
340 int peerlen = BIO_ADDR_sockaddr_size(&data->peer);
342 # if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
343 ret = sendto(b->num, (char *)in, inl, 0,
344 BIO_ADDR_sockaddr(&data->peer), peerlen);
346 ret = sendto(b->num, in, inl, 0,
347 BIO_ADDR_sockaddr(&data->peer), peerlen);
351 BIO_clear_retry_flags(b);
353 if (BIO_dgram_should_retry(ret)) {
354 BIO_set_retry_write(b);
355 data->_errno = get_last_socket_error();
361 static long dgram_get_mtu_overhead(bio_dgram_data *data)
365 switch (BIO_ADDR_family(&data->peer)) {
368 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
375 # ifdef IN6_IS_ADDR_V4MAPPED
376 struct in6_addr tmp_addr;
377 if (BIO_ADDR_rawaddress(&data->peer, &tmp_addr, NULL)
378 && IN6_IS_ADDR_V4MAPPED(&tmp_addr))
380 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
386 * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
393 /* We don't know. Go with the historical default */
400 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
404 bio_dgram_data *data = NULL;
407 # if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
408 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
409 * modern enough to define socklen_t */
414 data = (bio_dgram_data *)b->ptr;
426 b->num = *((int *)ptr);
427 b->shutdown = (int)num;
439 case BIO_CTRL_GET_CLOSE:
442 case BIO_CTRL_SET_CLOSE:
443 b->shutdown = (int)num;
445 case BIO_CTRL_PENDING:
446 case BIO_CTRL_WPENDING:
453 case BIO_CTRL_DGRAM_CONNECT:
454 BIO_ADDR_make(&data->peer, BIO_ADDR_sockaddr((BIO_ADDR *)ptr));
456 /* (Linux)kernel sets DF bit on outgoing IP packets */
457 case BIO_CTRL_DGRAM_MTU_DISCOVER:
458 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
459 addr_len = (socklen_t) sizeof(addr);
460 memset(&addr, 0, sizeof(addr));
461 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
465 switch (addr.sa.sa_family) {
467 sockopt_val = IP_PMTUDISC_DO;
468 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
469 &sockopt_val, sizeof(sockopt_val))) < 0)
470 perror("setsockopt");
472 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
474 sockopt_val = IPV6_PMTUDISC_DO;
475 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
476 &sockopt_val, sizeof(sockopt_val))) < 0)
477 perror("setsockopt");
488 case BIO_CTRL_DGRAM_QUERY_MTU:
489 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
490 addr_len = (socklen_t) sizeof(addr);
491 memset(&addr, 0, sizeof(addr));
492 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
496 sockopt_len = sizeof(sockopt_val);
497 switch (addr.sa.sa_family) {
500 getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
501 &sockopt_len)) < 0 || sockopt_val < 0) {
505 * we assume that the transport protocol is UDP and no IP
508 data->mtu = sockopt_val - 8 - 20;
512 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
515 getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
516 (void *)&sockopt_val, &sockopt_len)) < 0
517 || sockopt_val < 0) {
521 * we assume that the transport protocol is UDP and no IPV6
524 data->mtu = sockopt_val - 8 - 40;
537 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
538 ret = -dgram_get_mtu_overhead(data);
539 switch (BIO_ADDR_family(&data->peer)) {
543 # if OPENSSL_USE_IPV6
546 # ifdef IN6_IS_ADDR_V4MAPPED
547 struct in6_addr tmp_addr;
548 if (BIO_ADDR_rawaddress(&data->peer, &tmp_addr, NULL)
549 && IN6_IS_ADDR_V4MAPPED(&tmp_addr))
562 case BIO_CTRL_DGRAM_GET_MTU:
564 case BIO_CTRL_DGRAM_SET_MTU:
568 case BIO_CTRL_DGRAM_SET_CONNECTED:
571 BIO_ADDR_make(&data->peer, BIO_ADDR_sockaddr((BIO_ADDR *)ptr));
574 memset(&data->peer, 0, sizeof(data->peer));
577 case BIO_CTRL_DGRAM_GET_PEER:
578 ret = BIO_ADDR_sockaddr_size(&data->peer);
579 /* FIXME: if num < ret, we will only return part of an address.
580 That should bee an error, no? */
581 if (num == 0 || num > ret)
583 memcpy(ptr, &data->peer, (ret = num));
585 case BIO_CTRL_DGRAM_SET_PEER:
586 BIO_ADDR_make(&data->peer, BIO_ADDR_sockaddr((BIO_ADDR *)ptr));
588 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
589 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
591 # if defined(SO_RCVTIMEO)
592 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
593 # ifdef OPENSSL_SYS_WINDOWS
595 struct timeval *tv = (struct timeval *)ptr;
596 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
597 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
598 (void *)&timeout, sizeof(timeout)) < 0) {
599 perror("setsockopt");
604 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
605 sizeof(struct timeval)) < 0) {
606 perror("setsockopt");
611 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
619 # ifdef OPENSSL_SYS_WINDOWS
621 struct timeval *tv = (struct timeval *)ptr;
623 sz.i = sizeof(timeout);
624 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
625 (void *)&timeout, &sz.i) < 0) {
626 perror("getsockopt");
629 tv->tv_sec = timeout / 1000;
630 tv->tv_usec = (timeout % 1000) * 1000;
634 sz.i = sizeof(struct timeval);
635 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
636 ptr, (void *)&sz) < 0) {
637 perror("getsockopt");
639 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
640 OPENSSL_assert(sz.s <= sizeof(struct timeval));
648 # if defined(SO_SNDTIMEO)
649 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
650 # ifdef OPENSSL_SYS_WINDOWS
652 struct timeval *tv = (struct timeval *)ptr;
653 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
654 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
655 (void *)&timeout, sizeof(timeout)) < 0) {
656 perror("setsockopt");
661 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
662 sizeof(struct timeval)) < 0) {
663 perror("setsockopt");
668 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
676 # ifdef OPENSSL_SYS_WINDOWS
678 struct timeval *tv = (struct timeval *)ptr;
680 sz.i = sizeof(timeout);
681 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
682 (void *)&timeout, &sz.i) < 0) {
683 perror("getsockopt");
686 tv->tv_sec = timeout / 1000;
687 tv->tv_usec = (timeout % 1000) * 1000;
691 sz.i = sizeof(struct timeval);
692 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
693 ptr, (void *)&sz) < 0) {
694 perror("getsockopt");
696 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
697 OPENSSL_assert(sz.s <= sizeof(struct timeval));
705 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
707 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
708 # ifdef OPENSSL_SYS_WINDOWS
709 d_errno = (data->_errno == WSAETIMEDOUT);
711 d_errno = (data->_errno == EAGAIN);
720 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
721 if (data->_errno == EMSGSIZE) {
728 case BIO_CTRL_DGRAM_SET_DONT_FRAG:
729 sockopt_val = num ? 1 : 0;
731 switch (data->peer.sa.sa_family) {
733 # if defined(IP_DONTFRAG)
734 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG,
735 &sockopt_val, sizeof(sockopt_val))) < 0) {
736 perror("setsockopt");
739 # elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined (IP_PMTUDISC_PROBE)
740 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
741 (ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
742 &sockopt_val, sizeof(sockopt_val))) < 0) {
743 perror("setsockopt");
746 # elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT)
747 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT,
748 (const char *)&sockopt_val,
749 sizeof(sockopt_val))) < 0) {
750 perror("setsockopt");
757 # if OPENSSL_USE_IPV6
759 # if defined(IPV6_DONTFRAG)
760 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
761 (const void *)&sockopt_val,
762 sizeof(sockopt_val))) < 0) {
763 perror("setsockopt");
766 # elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER)
767 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
768 (ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
769 &sockopt_val, sizeof(sockopt_val))) < 0) {
770 perror("setsockopt");
783 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
784 ret = dgram_get_mtu_overhead(data);
788 * BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE is used here for compatibility
789 * reasons. When BIO_CTRL_DGRAM_SET_PEEK_MODE was first defined its value
790 * was incorrectly clashing with BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE. The
791 * value has been updated to a non-clashing value. However to preserve
792 * binary compatiblity we now respond to both the old value and the new one
794 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
795 case BIO_CTRL_DGRAM_SET_PEEK_MODE:
796 data->peekmode = (unsigned int)num;
805 static int dgram_puts(BIO *bp, const char *str)
810 ret = dgram_write(bp, str, n);
814 # ifndef OPENSSL_NO_SCTP
815 const BIO_METHOD *BIO_s_datagram_sctp(void)
817 return (&methods_dgramp_sctp);
820 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
823 int ret, optval = 20000;
824 int auth_data = 0, auth_forward = 0;
826 struct sctp_authchunk auth;
827 struct sctp_authchunks *authchunks;
828 socklen_t sockopt_len;
829 # ifdef SCTP_AUTHENTICATION_EVENT
831 struct sctp_event event;
833 struct sctp_event_subscribe event;
837 bio = BIO_new(BIO_s_datagram_sctp());
840 BIO_set_fd(bio, fd, close_flag);
842 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
843 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
845 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
846 sizeof(struct sctp_authchunk));
849 BIOerr(BIO_F_BIO_NEW_DGRAM_SCTP, ERR_R_SYS_LIB);
850 ERR_add_error_data(1, "Ensure SCTP AUTH chunks are enabled in kernel");
853 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
855 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
856 sizeof(struct sctp_authchunk));
859 BIOerr(BIO_F_BIO_NEW_DGRAM_SCTP, ERR_R_SYS_LIB);
860 ERR_add_error_data(1, "Ensure SCTP AUTH chunks are enabled in kernel");
865 * Test if activation was successful. When using accept(), SCTP-AUTH has
866 * to be activated for the listening socket already, otherwise the
867 * connected socket won't use it. Similarly with connect(): the socket
868 * prior to connection must be activated for SCTP-AUTH
870 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
871 authchunks = OPENSSL_zalloc(sockopt_len);
872 if (authchunks == NULL) {
876 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
879 OPENSSL_free(authchunks);
884 for (p = (unsigned char *)authchunks->gauth_chunks;
885 p < (unsigned char *)authchunks + sockopt_len;
886 p += sizeof(uint8_t)) {
887 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
889 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
893 OPENSSL_free(authchunks);
895 if (!auth_data || !auth_forward) {
897 BIOerr(BIO_F_BIO_NEW_DGRAM_SCTP, ERR_R_SYS_LIB);
898 ERR_add_error_data(1,
899 "Ensure SCTP AUTH chunks are enabled on the "
900 "underlying socket");
904 # ifdef SCTP_AUTHENTICATION_EVENT
906 memset(&event, 0, sizeof(event));
907 event.se_assoc_id = 0;
908 event.se_type = SCTP_AUTHENTICATION_EVENT;
911 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
912 sizeof(struct sctp_event));
918 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
919 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
925 event.sctp_authentication_event = 1;
928 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
929 sizeof(struct sctp_event_subscribe));
938 * Disable partial delivery by setting the min size larger than the max
939 * record size of 2^14 + 2048 + 13
942 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
952 int BIO_dgram_is_sctp(BIO *bio)
954 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
957 static int dgram_sctp_new(BIO *bi)
959 bio_dgram_sctp_data *data = NULL;
963 data = OPENSSL_zalloc(sizeof(*data));
966 # ifdef SCTP_PR_SCTP_NONE
967 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
975 static int dgram_sctp_free(BIO *a)
977 bio_dgram_sctp_data *data;
984 data = (bio_dgram_sctp_data *) a->ptr;
991 # ifdef SCTP_AUTHENTICATION_EVENT
992 void dgram_sctp_handle_auth_free_key_event(BIO *b,
993 union sctp_notification *snp)
996 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
998 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
999 struct sctp_authkeyid authkeyid;
1002 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1003 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1004 &authkeyid, sizeof(struct sctp_authkeyid));
1009 static int dgram_sctp_read(BIO *b, char *out, int outl)
1011 int ret = 0, n = 0, i, optval;
1013 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1014 union sctp_notification *snp;
1017 struct cmsghdr *cmsg;
1021 clear_socket_error();
1024 memset(&data->rcvinfo, 0, sizeof(data->rcvinfo));
1027 msg.msg_name = NULL;
1028 msg.msg_namelen = 0;
1031 msg.msg_control = cmsgbuf;
1032 msg.msg_controllen = 512;
1034 n = recvmsg(b->num, &msg, 0);
1042 if (msg.msg_controllen > 0) {
1043 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1044 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1045 if (cmsg->cmsg_level != IPPROTO_SCTP)
1047 # ifdef SCTP_RCVINFO
1048 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1049 struct sctp_rcvinfo *rcvinfo;
1051 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1052 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1053 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1054 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1055 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1056 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1057 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1058 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1062 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1063 struct sctp_sndrcvinfo *sndrcvinfo;
1066 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1067 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1068 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1069 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1070 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1071 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1072 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1073 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1079 if (msg.msg_flags & MSG_NOTIFICATION) {
1080 snp = (union sctp_notification *)out;
1081 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1083 struct sctp_event event;
1085 struct sctp_event_subscribe event;
1086 socklen_t eventsize;
1089 /* disable sender dry event */
1091 memset(&event, 0, sizeof(event));
1092 event.se_assoc_id = 0;
1093 event.se_type = SCTP_SENDER_DRY_EVENT;
1095 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1096 sizeof(struct sctp_event));
1102 eventsize = sizeof(struct sctp_event_subscribe);
1103 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1110 event.sctp_sender_dry_event = 0;
1112 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1113 sizeof(struct sctp_event_subscribe));
1120 # ifdef SCTP_AUTHENTICATION_EVENT
1121 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1122 dgram_sctp_handle_auth_free_key_event(b, snp);
1125 if (data->handle_notifications != NULL)
1126 data->handle_notifications(b, data->notification_context,
1129 memset(out, 0, outl);
1133 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1136 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1137 /* Partial message read, this should never happen! */
1140 * The buffer was too small, this means the peer sent a message
1141 * that was larger than allowed.
1147 * Test if socket buffer can handle max record size (2^14 + 2048
1150 optlen = (socklen_t) sizeof(int);
1151 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1153 OPENSSL_assert(optval >= 18445);
1156 * Test if SCTP doesn't partially deliver below max record size
1157 * (2^14 + 2048 + 13)
1159 optlen = (socklen_t) sizeof(int);
1161 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1164 OPENSSL_assert(optval >= 18445);
1167 * Partially delivered notification??? Probably a bug....
1169 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1172 * Everything seems ok till now, so it's most likely a message
1173 * dropped by PR-SCTP.
1175 memset(out, 0, outl);
1176 BIO_set_retry_read(b);
1180 BIO_clear_retry_flags(b);
1182 if (BIO_dgram_should_retry(ret)) {
1183 BIO_set_retry_read(b);
1184 data->_errno = get_last_socket_error();
1188 /* Test if peer uses SCTP-AUTH before continuing */
1189 if (!data->peer_auth_tested) {
1190 int ii, auth_data = 0, auth_forward = 0;
1192 struct sctp_authchunks *authchunks;
1195 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1196 authchunks = OPENSSL_malloc(optlen);
1197 if (authchunks == NULL) {
1198 BIOerr(BIO_F_DGRAM_SCTP_READ, ERR_R_MALLOC_FAILURE);
1201 memset(authchunks, 0, optlen);
1202 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1203 authchunks, &optlen);
1206 for (p = (unsigned char *)authchunks->gauth_chunks;
1207 p < (unsigned char *)authchunks + optlen;
1208 p += sizeof(uint8_t)) {
1209 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1211 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1215 OPENSSL_free(authchunks);
1217 if (!auth_data || !auth_forward) {
1218 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1222 data->peer_auth_tested = 1;
1229 * dgram_sctp_write - send message on SCTP socket
1230 * @b: BIO to write to
1232 * @inl: amount of bytes in @in to send
1234 * Returns -1 on error or the sent amount of bytes on success
1236 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1239 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1240 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1241 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1242 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1243 struct iovec iov[1];
1245 struct cmsghdr *cmsg;
1246 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1247 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1248 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1249 struct sctp_sndinfo *sndinfo;
1250 struct sctp_prinfo *prinfo;
1252 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1253 struct sctp_sndrcvinfo *sndrcvinfo;
1256 clear_socket_error();
1259 * If we're send anything else than application data, disable all user
1260 * parameters and flags.
1263 memset(&handshake_sinfo, 0, sizeof(handshake_sinfo));
1264 # ifdef SCTP_SACK_IMMEDIATELY
1265 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1267 sinfo = &handshake_sinfo;
1270 /* We can only send a shutdown alert if the socket is dry */
1271 if (data->save_shutdown) {
1272 ret = BIO_dgram_sctp_wait_for_dry(b);
1276 BIO_clear_retry_flags(b);
1277 BIO_set_retry_write(b);
1282 iov[0].iov_base = (char *)in;
1283 iov[0].iov_len = inl;
1284 msg.msg_name = NULL;
1285 msg.msg_namelen = 0;
1288 msg.msg_control = (caddr_t) cmsgbuf;
1289 msg.msg_controllen = 0;
1291 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1292 cmsg = (struct cmsghdr *)cmsgbuf;
1293 cmsg->cmsg_level = IPPROTO_SCTP;
1294 cmsg->cmsg_type = SCTP_SNDINFO;
1295 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1296 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1297 memset(sndinfo, 0, sizeof(*sndinfo));
1298 sndinfo->snd_sid = sinfo->snd_sid;
1299 sndinfo->snd_flags = sinfo->snd_flags;
1300 sndinfo->snd_ppid = sinfo->snd_ppid;
1301 sndinfo->snd_context = sinfo->snd_context;
1302 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1305 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1306 cmsg->cmsg_level = IPPROTO_SCTP;
1307 cmsg->cmsg_type = SCTP_PRINFO;
1308 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1309 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1310 memset(prinfo, 0, sizeof(*prinfo));
1311 prinfo->pr_policy = pinfo->pr_policy;
1312 prinfo->pr_value = pinfo->pr_value;
1313 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1315 cmsg = (struct cmsghdr *)cmsgbuf;
1316 cmsg->cmsg_level = IPPROTO_SCTP;
1317 cmsg->cmsg_type = SCTP_SNDRCV;
1318 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1319 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1320 memset(sndrcvinfo, 0, sizeof(*sndrcvinfo));
1321 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1322 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1324 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1326 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1327 sndrcvinfo->sinfo_context = sinfo->snd_context;
1328 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1329 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1332 ret = sendmsg(b->num, &msg, 0);
1334 BIO_clear_retry_flags(b);
1336 if (BIO_dgram_should_retry(ret)) {
1337 BIO_set_retry_write(b);
1338 data->_errno = get_last_socket_error();
1344 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1347 bio_dgram_sctp_data *data = NULL;
1348 socklen_t sockopt_len = 0;
1349 struct sctp_authkeyid authkeyid;
1350 struct sctp_authkey *authkey = NULL;
1352 data = (bio_dgram_sctp_data *) b->ptr;
1355 case BIO_CTRL_DGRAM_QUERY_MTU:
1357 * Set to maximum (2^14) and ignore user input to enable transport
1358 * protocol fragmentation. Returns always 2^14.
1363 case BIO_CTRL_DGRAM_SET_MTU:
1365 * Set to maximum (2^14) and ignore input to enable transport
1366 * protocol fragmentation. Returns always 2^14.
1371 case BIO_CTRL_DGRAM_SET_CONNECTED:
1372 case BIO_CTRL_DGRAM_CONNECT:
1373 /* Returns always -1. */
1376 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1378 * SCTP doesn't need the DTLS timer Returns always 1.
1381 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1383 * We allow transport protocol fragmentation so this is irrelevant
1387 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1389 data->in_handshake = 1;
1391 data->in_handshake = 0;
1394 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1395 &data->in_handshake, sizeof(int));
1397 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1399 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1402 /* Get active key */
1403 sockopt_len = sizeof(struct sctp_authkeyid);
1405 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1411 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1412 authkey = OPENSSL_malloc(sockopt_len);
1413 if (authkey == NULL) {
1417 memset(authkey, 0, sockopt_len);
1418 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1419 # ifndef __FreeBSD__
1421 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1422 * and higher work without it.
1424 authkey->sca_keylength = 64;
1426 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1429 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1431 OPENSSL_free(authkey);
1436 /* Reset active key */
1437 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1438 &authkeyid, sizeof(struct sctp_authkeyid));
1443 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1444 /* Returns 0 on success, -1 otherwise. */
1446 /* Get active key */
1447 sockopt_len = sizeof(struct sctp_authkeyid);
1449 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1454 /* Set active key */
1455 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1456 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1457 &authkeyid, sizeof(struct sctp_authkeyid));
1462 * CCS has been sent, so remember that and fall through to check if
1463 * we need to deactivate an old key
1467 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1468 /* Returns 0 on success, -1 otherwise. */
1471 * Has this command really been called or is this just a
1474 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1478 * CSS has been both, received and sent, so deactivate an old key
1480 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1481 /* Get active key */
1482 sockopt_len = sizeof(struct sctp_authkeyid);
1484 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1485 &authkeyid, &sockopt_len);
1490 * Deactivate key or delete second last key if
1491 * SCTP_AUTHENTICATION_EVENT is not available.
1493 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1494 # ifdef SCTP_AUTH_DEACTIVATE_KEY
1495 sockopt_len = sizeof(struct sctp_authkeyid);
1496 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1497 &authkeyid, sockopt_len);
1501 # ifndef SCTP_AUTHENTICATION_EVENT
1502 if (authkeyid.scact_keynumber > 0) {
1503 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1504 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1505 &authkeyid, sizeof(struct sctp_authkeyid));
1515 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1516 /* Returns the size of the copied struct. */
1517 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1518 num = sizeof(struct bio_dgram_sctp_sndinfo);
1520 memcpy(ptr, &(data->sndinfo), num);
1523 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1524 /* Returns the size of the copied struct. */
1525 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1526 num = sizeof(struct bio_dgram_sctp_sndinfo);
1528 memcpy(&(data->sndinfo), ptr, num);
1530 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1531 /* Returns the size of the copied struct. */
1532 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1533 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1535 memcpy(ptr, &data->rcvinfo, num);
1539 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1540 /* Returns the size of the copied struct. */
1541 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1542 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1544 memcpy(&(data->rcvinfo), ptr, num);
1546 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1547 /* Returns the size of the copied struct. */
1548 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1549 num = sizeof(struct bio_dgram_sctp_prinfo);
1551 memcpy(ptr, &(data->prinfo), num);
1554 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1555 /* Returns the size of the copied struct. */
1556 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1557 num = sizeof(struct bio_dgram_sctp_prinfo);
1559 memcpy(&(data->prinfo), ptr, num);
1561 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1562 /* Returns always 1. */
1564 data->save_shutdown = 1;
1566 data->save_shutdown = 0;
1571 * Pass to default ctrl function to process SCTP unspecific commands
1573 ret = dgram_ctrl(b, cmd, num, ptr);
1579 int BIO_dgram_sctp_notification_cb(BIO *b,
1580 void (*handle_notifications) (BIO *bio,
1586 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1588 if (handle_notifications != NULL) {
1589 data->handle_notifications = handle_notifications;
1590 data->notification_context = context;
1598 * BIO_dgram_sctp_wait_for_dry - Wait for SCTP SENDER_DRY event
1599 * @b: The BIO to check for the dry event
1601 * Wait until the peer confirms all packets have been received, and so that
1602 * our kernel doesn't have anything to send anymore. This is only received by
1603 * the peer's kernel, not the application.
1607 * 0 when not dry yet
1610 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1615 union sctp_notification snp;
1619 struct sctp_event event;
1621 struct sctp_event_subscribe event;
1622 socklen_t eventsize;
1624 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1626 /* set sender dry event */
1628 memset(&event, 0, sizeof(event));
1629 event.se_assoc_id = 0;
1630 event.se_type = SCTP_SENDER_DRY_EVENT;
1633 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1634 sizeof(struct sctp_event));
1636 eventsize = sizeof(struct sctp_event_subscribe);
1637 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1641 event.sctp_sender_dry_event = 1;
1644 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1645 sizeof(struct sctp_event_subscribe));
1650 /* peek for notification */
1651 memset(&snp, 0, sizeof(snp));
1652 iov.iov_base = (char *)&snp;
1653 iov.iov_len = sizeof(union sctp_notification);
1654 msg.msg_name = NULL;
1655 msg.msg_namelen = 0;
1658 msg.msg_control = NULL;
1659 msg.msg_controllen = 0;
1662 n = recvmsg(b->num, &msg, MSG_PEEK);
1664 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1665 && (get_last_socket_error() != EWOULDBLOCK))
1671 /* if we find a notification, process it and try again if necessary */
1672 while (msg.msg_flags & MSG_NOTIFICATION) {
1673 memset(&snp, 0, sizeof(snp));
1674 iov.iov_base = (char *)&snp;
1675 iov.iov_len = sizeof(union sctp_notification);
1676 msg.msg_name = NULL;
1677 msg.msg_namelen = 0;
1680 msg.msg_control = NULL;
1681 msg.msg_controllen = 0;
1684 n = recvmsg(b->num, &msg, 0);
1686 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1687 && (get_last_socket_error() != EWOULDBLOCK))
1693 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1696 /* disable sender dry event */
1698 memset(&event, 0, sizeof(event));
1699 event.se_assoc_id = 0;
1700 event.se_type = SCTP_SENDER_DRY_EVENT;
1703 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1704 sizeof(struct sctp_event));
1706 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1708 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1713 event.sctp_sender_dry_event = 0;
1716 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1717 sizeof(struct sctp_event_subscribe));
1722 # ifdef SCTP_AUTHENTICATION_EVENT
1723 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1724 dgram_sctp_handle_auth_free_key_event(b, &snp);
1727 if (data->handle_notifications != NULL)
1728 data->handle_notifications(b, data->notification_context,
1731 /* found notification, peek again */
1732 memset(&snp, 0, sizeof(snp));
1733 iov.iov_base = (char *)&snp;
1734 iov.iov_len = sizeof(union sctp_notification);
1735 msg.msg_name = NULL;
1736 msg.msg_namelen = 0;
1739 msg.msg_control = NULL;
1740 msg.msg_controllen = 0;
1743 /* if we have seen the dry already, don't wait */
1745 sockflags = fcntl(b->num, F_GETFL, 0);
1746 fcntl(b->num, F_SETFL, O_NONBLOCK);
1749 n = recvmsg(b->num, &msg, MSG_PEEK);
1752 fcntl(b->num, F_SETFL, sockflags);
1756 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1757 && (get_last_socket_error() != EWOULDBLOCK))
1764 /* read anything else */
1768 int BIO_dgram_sctp_msg_waiting(BIO *b)
1771 union sctp_notification snp;
1774 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1776 /* Check if there are any messages waiting to be read */
1778 memset(&snp, 0, sizeof(snp));
1779 iov.iov_base = (char *)&snp;
1780 iov.iov_len = sizeof(union sctp_notification);
1781 msg.msg_name = NULL;
1782 msg.msg_namelen = 0;
1785 msg.msg_control = NULL;
1786 msg.msg_controllen = 0;
1789 sockflags = fcntl(b->num, F_GETFL, 0);
1790 fcntl(b->num, F_SETFL, O_NONBLOCK);
1791 n = recvmsg(b->num, &msg, MSG_PEEK);
1792 fcntl(b->num, F_SETFL, sockflags);
1794 /* if notification, process and try again */
1795 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1796 # ifdef SCTP_AUTHENTICATION_EVENT
1797 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1798 dgram_sctp_handle_auth_free_key_event(b, &snp);
1801 memset(&snp, 0, sizeof(snp));
1802 iov.iov_base = (char *)&snp;
1803 iov.iov_len = sizeof(union sctp_notification);
1804 msg.msg_name = NULL;
1805 msg.msg_namelen = 0;
1808 msg.msg_control = NULL;
1809 msg.msg_controllen = 0;
1811 n = recvmsg(b->num, &msg, 0);
1813 if (data->handle_notifications != NULL)
1814 data->handle_notifications(b, data->notification_context,
1818 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1820 /* Return 1 if there is a message to be read, return 0 otherwise. */
1827 static int dgram_sctp_puts(BIO *bp, const char *str)
1832 ret = dgram_sctp_write(bp, str, n);
1837 static int BIO_dgram_should_retry(int i)
1841 if ((i == 0) || (i == -1)) {
1842 err = get_last_socket_error();
1844 # if defined(OPENSSL_SYS_WINDOWS)
1846 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1847 * this point, the error code was overwritten by another system call
1848 * before this error handling is called.
1852 return (BIO_dgram_non_fatal_error(err));
1857 int BIO_dgram_non_fatal_error(int err)
1860 # if defined(OPENSSL_SYS_WINDOWS)
1861 # if defined(WSAEWOULDBLOCK)
1862 case WSAEWOULDBLOCK:
1867 # ifdef WSAEWOULDBLOCK
1868 # if WSAEWOULDBLOCK != EWOULDBLOCK
1881 # if EWOULDBLOCK != EAGAIN
1905 static void get_current_time(struct timeval *t)
1907 # if defined(_WIN32)
1910 unsigned __int64 ul;
1915 SystemTimeToFileTime(&st, &now.ft);
1917 now.ul -= 116444736000000000ULL;
1919 now.ul -= 116444736000000000UI64; /* re-bias to 1/1/1970 */
1921 t->tv_sec = (long)(now.ul / 10000000);
1922 t->tv_usec = ((int)(now.ul % 10000000)) / 10;
1924 gettimeofday(t, NULL);