2 * Copyright 2005-2016 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
17 # include <sys/time.h>
20 # ifndef OPENSSL_NO_SCTP
21 # include <netinet/sctp.h>
23 # define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
24 # define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
27 # if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
28 # define IP_MTU 14 /* linux is lame */
31 # if OPENSSL_USE_IPV6 && !defined(IPPROTO_IPV6)
32 # define IPPROTO_IPV6 41 /* windows is lame */
35 # if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
36 /* Standard definition causes type-punning problems. */
37 # undef IN6_IS_ADDR_V4MAPPED
38 # define s6_addr32 __u6_addr.__u6_addr32
39 # define IN6_IS_ADDR_V4MAPPED(a) \
40 (((a)->s6_addr32[0] == 0) && \
41 ((a)->s6_addr32[1] == 0) && \
42 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
45 static int dgram_write(BIO *h, const char *buf, int num);
46 static int dgram_read(BIO *h, char *buf, int size);
47 static int dgram_puts(BIO *h, const char *str);
48 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
49 static int dgram_new(BIO *h);
50 static int dgram_free(BIO *data);
51 static int dgram_clear(BIO *bio);
53 # ifndef OPENSSL_NO_SCTP
54 static int dgram_sctp_write(BIO *h, const char *buf, int num);
55 static int dgram_sctp_read(BIO *h, char *buf, int size);
56 static int dgram_sctp_puts(BIO *h, const char *str);
57 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
58 static int dgram_sctp_new(BIO *h);
59 static int dgram_sctp_free(BIO *data);
60 # ifdef SCTP_AUTHENTICATION_EVENT
61 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification
66 static int BIO_dgram_should_retry(int s);
68 static void get_current_time(struct timeval *t);
70 static const BIO_METHOD methods_dgramp = {
73 /* TODO: Convert to new style write function */
76 /* TODO: Convert to new style read function */
80 NULL, /* dgram_gets, */
87 # ifndef OPENSSL_NO_SCTP
88 static const BIO_METHOD methods_dgramp_sctp = {
90 "datagram sctp socket",
91 /* TODO: Convert to new style write function */
94 /* TODO: Convert to new style write function */
98 NULL, /* dgram_gets, */
106 typedef struct bio_dgram_data_st {
108 unsigned int connected;
111 struct timeval next_timeout;
112 struct timeval socket_timeout;
113 unsigned int peekmode;
116 # ifndef OPENSSL_NO_SCTP
117 typedef struct bio_dgram_sctp_save_message_st {
121 } bio_dgram_sctp_save_message;
123 typedef struct bio_dgram_sctp_data_st {
125 unsigned int connected;
128 struct bio_dgram_sctp_sndinfo sndinfo;
129 struct bio_dgram_sctp_rcvinfo rcvinfo;
130 struct bio_dgram_sctp_prinfo prinfo;
131 void (*handle_notifications) (BIO *bio, void *context, void *buf);
132 void *notification_context;
137 int peer_auth_tested;
138 } bio_dgram_sctp_data;
141 const BIO_METHOD *BIO_s_datagram(void)
143 return (&methods_dgramp);
146 BIO *BIO_new_dgram(int fd, int close_flag)
150 ret = BIO_new(BIO_s_datagram());
153 BIO_set_fd(ret, fd, close_flag);
157 static int dgram_new(BIO *bi)
159 bio_dgram_data *data = OPENSSL_zalloc(sizeof(*data));
167 static int dgram_free(BIO *a)
169 bio_dgram_data *data;
176 data = (bio_dgram_data *)a->ptr;
182 static int dgram_clear(BIO *a)
188 BIO_closesocket(a->num);
196 static void dgram_adjust_rcv_timeout(BIO *b)
198 # if defined(SO_RCVTIMEO)
199 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
207 /* Is a timer active? */
208 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
209 struct timeval timenow, timeleft;
211 /* Read current socket timeout */
212 # ifdef OPENSSL_SYS_WINDOWS
215 sz.i = sizeof(timeout);
216 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
217 (void *)&timeout, &sz.i) < 0) {
218 perror("getsockopt");
220 data->socket_timeout.tv_sec = timeout / 1000;
221 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
224 sz.i = sizeof(data->socket_timeout);
225 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
226 &(data->socket_timeout), (void *)&sz) < 0) {
227 perror("getsockopt");
228 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0)
229 OPENSSL_assert(sz.s <= sizeof(data->socket_timeout));
232 /* Get current time */
233 get_current_time(&timenow);
235 /* Calculate time left until timer expires */
236 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
237 if (timeleft.tv_usec < timenow.tv_usec) {
238 timeleft.tv_usec = 1000000 - timenow.tv_usec + timeleft.tv_usec;
241 timeleft.tv_usec -= timenow.tv_usec;
243 if (timeleft.tv_sec < timenow.tv_sec) {
245 timeleft.tv_usec = 1;
247 timeleft.tv_sec -= timenow.tv_sec;
251 * Adjust socket timeout if next handshake message timer will expire
254 if ((data->socket_timeout.tv_sec == 0
255 && data->socket_timeout.tv_usec == 0)
256 || (data->socket_timeout.tv_sec > timeleft.tv_sec)
257 || (data->socket_timeout.tv_sec == timeleft.tv_sec
258 && data->socket_timeout.tv_usec >= timeleft.tv_usec)) {
259 # ifdef OPENSSL_SYS_WINDOWS
260 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
261 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
262 (void *)&timeout, sizeof(timeout)) < 0) {
263 perror("setsockopt");
266 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
267 sizeof(struct timeval)) < 0) {
268 perror("setsockopt");
276 static void dgram_reset_rcv_timeout(BIO *b)
278 # if defined(SO_RCVTIMEO)
279 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
281 /* Is a timer active? */
282 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
283 # ifdef OPENSSL_SYS_WINDOWS
284 int timeout = data->socket_timeout.tv_sec * 1000 +
285 data->socket_timeout.tv_usec / 1000;
286 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
287 (void *)&timeout, sizeof(timeout)) < 0) {
288 perror("setsockopt");
292 (b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
293 sizeof(struct timeval)) < 0) {
294 perror("setsockopt");
301 static int dgram_read(BIO *b, char *out, int outl)
304 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
308 socklen_t len = sizeof(peer);
311 clear_socket_error();
312 memset(&peer, 0, sizeof(peer));
313 dgram_adjust_rcv_timeout(b);
316 ret = recvfrom(b->num, out, outl, flags,
317 BIO_ADDR_sockaddr_noconst(&peer), &len);
319 if (!data->connected && ret >= 0)
320 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &peer);
322 BIO_clear_retry_flags(b);
324 if (BIO_dgram_should_retry(ret)) {
325 BIO_set_retry_read(b);
326 data->_errno = get_last_socket_error();
330 dgram_reset_rcv_timeout(b);
335 static int dgram_write(BIO *b, const char *in, int inl)
338 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
339 clear_socket_error();
342 ret = writesocket(b->num, in, inl);
344 int peerlen = BIO_ADDR_sockaddr_size(&data->peer);
346 # if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
347 ret = sendto(b->num, (char *)in, inl, 0,
348 BIO_ADDR_sockaddr(&data->peer), peerlen);
350 ret = sendto(b->num, in, inl, 0,
351 BIO_ADDR_sockaddr(&data->peer), peerlen);
355 BIO_clear_retry_flags(b);
357 if (BIO_dgram_should_retry(ret)) {
358 BIO_set_retry_write(b);
359 data->_errno = get_last_socket_error();
365 static long dgram_get_mtu_overhead(bio_dgram_data *data)
369 switch (BIO_ADDR_family(&data->peer)) {
372 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
379 # ifdef IN6_IS_ADDR_V4MAPPED
380 struct in6_addr tmp_addr;
381 if (BIO_ADDR_rawaddress(&data->peer, &tmp_addr, NULL)
382 && IN6_IS_ADDR_V4MAPPED(&tmp_addr))
384 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
390 * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
397 /* We don't know. Go with the historical default */
404 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
408 bio_dgram_data *data = NULL;
411 # if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
412 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
413 * modern enough to define socklen_t */
418 data = (bio_dgram_data *)b->ptr;
430 b->num = *((int *)ptr);
431 b->shutdown = (int)num;
443 case BIO_CTRL_GET_CLOSE:
446 case BIO_CTRL_SET_CLOSE:
447 b->shutdown = (int)num;
449 case BIO_CTRL_PENDING:
450 case BIO_CTRL_WPENDING:
457 case BIO_CTRL_DGRAM_CONNECT:
458 BIO_ADDR_make(&data->peer, BIO_ADDR_sockaddr((BIO_ADDR *)ptr));
460 /* (Linux)kernel sets DF bit on outgoing IP packets */
461 case BIO_CTRL_DGRAM_MTU_DISCOVER:
462 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
463 addr_len = (socklen_t) sizeof(addr);
464 memset(&addr, 0, sizeof(addr));
465 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
469 switch (addr.sa.sa_family) {
471 sockopt_val = IP_PMTUDISC_DO;
472 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
473 &sockopt_val, sizeof(sockopt_val))) < 0)
474 perror("setsockopt");
476 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
478 sockopt_val = IPV6_PMTUDISC_DO;
479 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
480 &sockopt_val, sizeof(sockopt_val))) < 0)
481 perror("setsockopt");
492 case BIO_CTRL_DGRAM_QUERY_MTU:
493 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
494 addr_len = (socklen_t) sizeof(addr);
495 memset(&addr, 0, sizeof(addr));
496 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
500 sockopt_len = sizeof(sockopt_val);
501 switch (addr.sa.sa_family) {
504 getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
505 &sockopt_len)) < 0 || sockopt_val < 0) {
509 * we assume that the transport protocol is UDP and no IP
512 data->mtu = sockopt_val - 8 - 20;
516 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
519 getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
520 (void *)&sockopt_val, &sockopt_len)) < 0
521 || sockopt_val < 0) {
525 * we assume that the transport protocol is UDP and no IPV6
528 data->mtu = sockopt_val - 8 - 40;
541 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
542 ret = -dgram_get_mtu_overhead(data);
543 switch (BIO_ADDR_family(&data->peer)) {
547 # if OPENSSL_USE_IPV6
550 # ifdef IN6_IS_ADDR_V4MAPPED
551 struct in6_addr tmp_addr;
552 if (BIO_ADDR_rawaddress(&data->peer, &tmp_addr, NULL)
553 && IN6_IS_ADDR_V4MAPPED(&tmp_addr))
566 case BIO_CTRL_DGRAM_GET_MTU:
568 case BIO_CTRL_DGRAM_SET_MTU:
572 case BIO_CTRL_DGRAM_SET_CONNECTED:
575 BIO_ADDR_make(&data->peer, BIO_ADDR_sockaddr((BIO_ADDR *)ptr));
578 memset(&data->peer, 0, sizeof(data->peer));
581 case BIO_CTRL_DGRAM_GET_PEER:
582 ret = BIO_ADDR_sockaddr_size(&data->peer);
583 /* FIXME: if num < ret, we will only return part of an address.
584 That should bee an error, no? */
585 if (num == 0 || num > ret)
587 memcpy(ptr, &data->peer, (ret = num));
589 case BIO_CTRL_DGRAM_SET_PEER:
590 BIO_ADDR_make(&data->peer, BIO_ADDR_sockaddr((BIO_ADDR *)ptr));
592 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
593 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
595 # if defined(SO_RCVTIMEO)
596 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
597 # ifdef OPENSSL_SYS_WINDOWS
599 struct timeval *tv = (struct timeval *)ptr;
600 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
601 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
602 (void *)&timeout, sizeof(timeout)) < 0) {
603 perror("setsockopt");
608 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
609 sizeof(struct timeval)) < 0) {
610 perror("setsockopt");
615 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
623 # ifdef OPENSSL_SYS_WINDOWS
625 struct timeval *tv = (struct timeval *)ptr;
627 sz.i = sizeof(timeout);
628 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
629 (void *)&timeout, &sz.i) < 0) {
630 perror("getsockopt");
633 tv->tv_sec = timeout / 1000;
634 tv->tv_usec = (timeout % 1000) * 1000;
638 sz.i = sizeof(struct timeval);
639 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
640 ptr, (void *)&sz) < 0) {
641 perror("getsockopt");
643 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
644 OPENSSL_assert(sz.s <= sizeof(struct timeval));
652 # if defined(SO_SNDTIMEO)
653 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
654 # ifdef OPENSSL_SYS_WINDOWS
656 struct timeval *tv = (struct timeval *)ptr;
657 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
658 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
659 (void *)&timeout, sizeof(timeout)) < 0) {
660 perror("setsockopt");
665 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
666 sizeof(struct timeval)) < 0) {
667 perror("setsockopt");
672 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
680 # ifdef OPENSSL_SYS_WINDOWS
682 struct timeval *tv = (struct timeval *)ptr;
684 sz.i = sizeof(timeout);
685 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
686 (void *)&timeout, &sz.i) < 0) {
687 perror("getsockopt");
690 tv->tv_sec = timeout / 1000;
691 tv->tv_usec = (timeout % 1000) * 1000;
695 sz.i = sizeof(struct timeval);
696 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
697 ptr, (void *)&sz) < 0) {
698 perror("getsockopt");
700 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
701 OPENSSL_assert(sz.s <= sizeof(struct timeval));
709 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
711 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
712 # ifdef OPENSSL_SYS_WINDOWS
713 d_errno = (data->_errno == WSAETIMEDOUT);
715 d_errno = (data->_errno == EAGAIN);
724 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
725 if (data->_errno == EMSGSIZE) {
732 case BIO_CTRL_DGRAM_SET_DONT_FRAG:
733 sockopt_val = num ? 1 : 0;
735 switch (data->peer.sa.sa_family) {
737 # if defined(IP_DONTFRAG)
738 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG,
739 &sockopt_val, sizeof(sockopt_val))) < 0) {
740 perror("setsockopt");
743 # elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined (IP_PMTUDISC_PROBE)
744 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
745 (ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
746 &sockopt_val, sizeof(sockopt_val))) < 0) {
747 perror("setsockopt");
750 # elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT)
751 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT,
752 (const char *)&sockopt_val,
753 sizeof(sockopt_val))) < 0) {
754 perror("setsockopt");
761 # if OPENSSL_USE_IPV6
763 # if defined(IPV6_DONTFRAG)
764 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
765 (const void *)&sockopt_val,
766 sizeof(sockopt_val))) < 0) {
767 perror("setsockopt");
770 # elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER)
771 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
772 (ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
773 &sockopt_val, sizeof(sockopt_val))) < 0) {
774 perror("setsockopt");
787 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
788 ret = dgram_get_mtu_overhead(data);
790 case BIO_CTRL_DGRAM_SET_PEEK_MODE:
791 data->peekmode = (unsigned int)num;
800 static int dgram_puts(BIO *bp, const char *str)
805 ret = dgram_write(bp, str, n);
809 # ifndef OPENSSL_NO_SCTP
810 const BIO_METHOD *BIO_s_datagram_sctp(void)
812 return (&methods_dgramp_sctp);
815 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
818 int ret, optval = 20000;
819 int auth_data = 0, auth_forward = 0;
821 struct sctp_authchunk auth;
822 struct sctp_authchunks *authchunks;
823 socklen_t sockopt_len;
824 # ifdef SCTP_AUTHENTICATION_EVENT
826 struct sctp_event event;
828 struct sctp_event_subscribe event;
832 bio = BIO_new(BIO_s_datagram_sctp());
835 BIO_set_fd(bio, fd, close_flag);
837 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
838 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
840 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
841 sizeof(struct sctp_authchunk));
844 BIOerr(BIO_F_BIO_NEW_DGRAM_SCTP, ERR_R_SYS_LIB);
845 ERR_add_error_data(1, "Ensure SCTP AUTH chunks are enabled in kernel");
848 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
850 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
851 sizeof(struct sctp_authchunk));
854 BIOerr(BIO_F_BIO_NEW_DGRAM_SCTP, ERR_R_SYS_LIB);
855 ERR_add_error_data(1, "Ensure SCTP AUTH chunks are enabled in kernel");
860 * Test if activation was successful. When using accept(), SCTP-AUTH has
861 * to be activated for the listening socket already, otherwise the
862 * connected socket won't use it. Similarly with connect(): the socket
863 * prior to connection must be activated for SCTP-AUTH
865 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
866 authchunks = OPENSSL_zalloc(sockopt_len);
867 if (authchunks == NULL) {
871 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
874 OPENSSL_free(authchunks);
879 for (p = (unsigned char *)authchunks->gauth_chunks;
880 p < (unsigned char *)authchunks + sockopt_len;
881 p += sizeof(uint8_t)) {
882 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
884 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
888 OPENSSL_free(authchunks);
890 if (!auth_data || !auth_forward) {
892 BIOerr(BIO_F_BIO_NEW_DGRAM_SCTP, ERR_R_SYS_LIB);
893 ERR_add_error_data(1,
894 "Ensure SCTP AUTH chunks are enabled on the "
895 "underlying socket");
899 # ifdef SCTP_AUTHENTICATION_EVENT
901 memset(&event, 0, sizeof(event));
902 event.se_assoc_id = 0;
903 event.se_type = SCTP_AUTHENTICATION_EVENT;
906 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
907 sizeof(struct sctp_event));
913 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
914 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
920 event.sctp_authentication_event = 1;
923 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
924 sizeof(struct sctp_event_subscribe));
933 * Disable partial delivery by setting the min size larger than the max
934 * record size of 2^14 + 2048 + 13
937 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
947 int BIO_dgram_is_sctp(BIO *bio)
949 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
952 static int dgram_sctp_new(BIO *bi)
954 bio_dgram_sctp_data *data = NULL;
958 data = OPENSSL_zalloc(sizeof(*data));
961 # ifdef SCTP_PR_SCTP_NONE
962 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
970 static int dgram_sctp_free(BIO *a)
972 bio_dgram_sctp_data *data;
979 data = (bio_dgram_sctp_data *) a->ptr;
986 # ifdef SCTP_AUTHENTICATION_EVENT
987 void dgram_sctp_handle_auth_free_key_event(BIO *b,
988 union sctp_notification *snp)
991 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
993 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
994 struct sctp_authkeyid authkeyid;
997 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
998 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
999 &authkeyid, sizeof(struct sctp_authkeyid));
1004 static int dgram_sctp_read(BIO *b, char *out, int outl)
1006 int ret = 0, n = 0, i, optval;
1008 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1009 union sctp_notification *snp;
1012 struct cmsghdr *cmsg;
1016 clear_socket_error();
1019 memset(&data->rcvinfo, 0, sizeof(data->rcvinfo));
1022 msg.msg_name = NULL;
1023 msg.msg_namelen = 0;
1026 msg.msg_control = cmsgbuf;
1027 msg.msg_controllen = 512;
1029 n = recvmsg(b->num, &msg, 0);
1037 if (msg.msg_controllen > 0) {
1038 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1039 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1040 if (cmsg->cmsg_level != IPPROTO_SCTP)
1042 # ifdef SCTP_RCVINFO
1043 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1044 struct sctp_rcvinfo *rcvinfo;
1046 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1047 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1048 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1049 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1050 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1051 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1052 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1053 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1057 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1058 struct sctp_sndrcvinfo *sndrcvinfo;
1061 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1062 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1063 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1064 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1065 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1066 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1067 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1068 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1074 if (msg.msg_flags & MSG_NOTIFICATION) {
1075 snp = (union sctp_notification *)out;
1076 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1078 struct sctp_event event;
1080 struct sctp_event_subscribe event;
1081 socklen_t eventsize;
1084 /* disable sender dry event */
1086 memset(&event, 0, sizeof(event));
1087 event.se_assoc_id = 0;
1088 event.se_type = SCTP_SENDER_DRY_EVENT;
1090 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1091 sizeof(struct sctp_event));
1097 eventsize = sizeof(struct sctp_event_subscribe);
1098 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1105 event.sctp_sender_dry_event = 0;
1107 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1108 sizeof(struct sctp_event_subscribe));
1115 # ifdef SCTP_AUTHENTICATION_EVENT
1116 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1117 dgram_sctp_handle_auth_free_key_event(b, snp);
1120 if (data->handle_notifications != NULL)
1121 data->handle_notifications(b, data->notification_context,
1124 memset(out, 0, outl);
1128 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1131 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1132 /* Partial message read, this should never happen! */
1135 * The buffer was too small, this means the peer sent a message
1136 * that was larger than allowed.
1142 * Test if socket buffer can handle max record size (2^14 + 2048
1145 optlen = (socklen_t) sizeof(int);
1146 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1148 OPENSSL_assert(optval >= 18445);
1151 * Test if SCTP doesn't partially deliver below max record size
1152 * (2^14 + 2048 + 13)
1154 optlen = (socklen_t) sizeof(int);
1156 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1159 OPENSSL_assert(optval >= 18445);
1162 * Partially delivered notification??? Probably a bug....
1164 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1167 * Everything seems ok till now, so it's most likely a message
1168 * dropped by PR-SCTP.
1170 memset(out, 0, outl);
1171 BIO_set_retry_read(b);
1175 BIO_clear_retry_flags(b);
1177 if (BIO_dgram_should_retry(ret)) {
1178 BIO_set_retry_read(b);
1179 data->_errno = get_last_socket_error();
1183 /* Test if peer uses SCTP-AUTH before continuing */
1184 if (!data->peer_auth_tested) {
1185 int ii, auth_data = 0, auth_forward = 0;
1187 struct sctp_authchunks *authchunks;
1190 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1191 authchunks = OPENSSL_malloc(optlen);
1192 if (authchunks == NULL) {
1193 BIOerr(BIO_F_DGRAM_SCTP_READ, ERR_R_MALLOC_FAILURE);
1196 memset(authchunks, 0, optlen);
1197 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1198 authchunks, &optlen);
1201 for (p = (unsigned char *)authchunks->gauth_chunks;
1202 p < (unsigned char *)authchunks + optlen;
1203 p += sizeof(uint8_t)) {
1204 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1206 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1210 OPENSSL_free(authchunks);
1212 if (!auth_data || !auth_forward) {
1213 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1217 data->peer_auth_tested = 1;
1224 * dgram_sctp_write - send message on SCTP socket
1225 * @b: BIO to write to
1227 * @inl: amount of bytes in @in to send
1229 * Returns -1 on error or the sent amount of bytes on success
1231 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1234 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1235 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1236 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1237 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1238 struct iovec iov[1];
1240 struct cmsghdr *cmsg;
1241 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1242 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1243 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1244 struct sctp_sndinfo *sndinfo;
1245 struct sctp_prinfo *prinfo;
1247 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1248 struct sctp_sndrcvinfo *sndrcvinfo;
1251 clear_socket_error();
1254 * If we're send anything else than application data, disable all user
1255 * parameters and flags.
1258 memset(&handshake_sinfo, 0, sizeof(handshake_sinfo));
1259 # ifdef SCTP_SACK_IMMEDIATELY
1260 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1262 sinfo = &handshake_sinfo;
1265 /* We can only send a shutdown alert if the socket is dry */
1266 if (data->save_shutdown) {
1267 ret = BIO_dgram_sctp_wait_for_dry(b);
1271 BIO_clear_retry_flags(b);
1272 BIO_set_retry_write(b);
1277 iov[0].iov_base = (char *)in;
1278 iov[0].iov_len = inl;
1279 msg.msg_name = NULL;
1280 msg.msg_namelen = 0;
1283 msg.msg_control = (caddr_t) cmsgbuf;
1284 msg.msg_controllen = 0;
1286 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1287 cmsg = (struct cmsghdr *)cmsgbuf;
1288 cmsg->cmsg_level = IPPROTO_SCTP;
1289 cmsg->cmsg_type = SCTP_SNDINFO;
1290 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1291 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1292 memset(sndinfo, 0, sizeof(*sndinfo));
1293 sndinfo->snd_sid = sinfo->snd_sid;
1294 sndinfo->snd_flags = sinfo->snd_flags;
1295 sndinfo->snd_ppid = sinfo->snd_ppid;
1296 sndinfo->snd_context = sinfo->snd_context;
1297 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1300 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1301 cmsg->cmsg_level = IPPROTO_SCTP;
1302 cmsg->cmsg_type = SCTP_PRINFO;
1303 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1304 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1305 memset(prinfo, 0, sizeof(*prinfo));
1306 prinfo->pr_policy = pinfo->pr_policy;
1307 prinfo->pr_value = pinfo->pr_value;
1308 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1310 cmsg = (struct cmsghdr *)cmsgbuf;
1311 cmsg->cmsg_level = IPPROTO_SCTP;
1312 cmsg->cmsg_type = SCTP_SNDRCV;
1313 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1314 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1315 memset(sndrcvinfo, 0, sizeof(*sndrcvinfo));
1316 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1317 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1319 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1321 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1322 sndrcvinfo->sinfo_context = sinfo->snd_context;
1323 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1324 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1327 ret = sendmsg(b->num, &msg, 0);
1329 BIO_clear_retry_flags(b);
1331 if (BIO_dgram_should_retry(ret)) {
1332 BIO_set_retry_write(b);
1333 data->_errno = get_last_socket_error();
1339 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1342 bio_dgram_sctp_data *data = NULL;
1343 socklen_t sockopt_len = 0;
1344 struct sctp_authkeyid authkeyid;
1345 struct sctp_authkey *authkey = NULL;
1347 data = (bio_dgram_sctp_data *) b->ptr;
1350 case BIO_CTRL_DGRAM_QUERY_MTU:
1352 * Set to maximum (2^14) and ignore user input to enable transport
1353 * protocol fragmentation. Returns always 2^14.
1358 case BIO_CTRL_DGRAM_SET_MTU:
1360 * Set to maximum (2^14) and ignore input to enable transport
1361 * protocol fragmentation. Returns always 2^14.
1366 case BIO_CTRL_DGRAM_SET_CONNECTED:
1367 case BIO_CTRL_DGRAM_CONNECT:
1368 /* Returns always -1. */
1371 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1373 * SCTP doesn't need the DTLS timer Returns always 1.
1376 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1378 * We allow transport protocol fragmentation so this is irrelevant
1382 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1384 data->in_handshake = 1;
1386 data->in_handshake = 0;
1389 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1390 &data->in_handshake, sizeof(int));
1392 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1394 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1397 /* Get active key */
1398 sockopt_len = sizeof(struct sctp_authkeyid);
1400 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1406 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1407 authkey = OPENSSL_malloc(sockopt_len);
1408 if (authkey == NULL) {
1412 memset(authkey, 0, sockopt_len);
1413 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1414 # ifndef __FreeBSD__
1416 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1417 * and higher work without it.
1419 authkey->sca_keylength = 64;
1421 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1424 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1426 OPENSSL_free(authkey);
1431 /* Reset active key */
1432 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1433 &authkeyid, sizeof(struct sctp_authkeyid));
1438 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1439 /* Returns 0 on success, -1 otherwise. */
1441 /* Get active key */
1442 sockopt_len = sizeof(struct sctp_authkeyid);
1444 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1449 /* Set active key */
1450 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1451 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1452 &authkeyid, sizeof(struct sctp_authkeyid));
1457 * CCS has been sent, so remember that and fall through to check if
1458 * we need to deactivate an old key
1462 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1463 /* Returns 0 on success, -1 otherwise. */
1466 * Has this command really been called or is this just a
1469 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1473 * CSS has been both, received and sent, so deactivate an old key
1475 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1476 /* Get active key */
1477 sockopt_len = sizeof(struct sctp_authkeyid);
1479 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1480 &authkeyid, &sockopt_len);
1485 * Deactivate key or delete second last key if
1486 * SCTP_AUTHENTICATION_EVENT is not available.
1488 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1489 # ifdef SCTP_AUTH_DEACTIVATE_KEY
1490 sockopt_len = sizeof(struct sctp_authkeyid);
1491 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1492 &authkeyid, sockopt_len);
1496 # ifndef SCTP_AUTHENTICATION_EVENT
1497 if (authkeyid.scact_keynumber > 0) {
1498 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1499 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1500 &authkeyid, sizeof(struct sctp_authkeyid));
1510 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1511 /* Returns the size of the copied struct. */
1512 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1513 num = sizeof(struct bio_dgram_sctp_sndinfo);
1515 memcpy(ptr, &(data->sndinfo), num);
1518 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1519 /* Returns the size of the copied struct. */
1520 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1521 num = sizeof(struct bio_dgram_sctp_sndinfo);
1523 memcpy(&(data->sndinfo), ptr, num);
1525 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1526 /* Returns the size of the copied struct. */
1527 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1528 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1530 memcpy(ptr, &data->rcvinfo, num);
1534 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1535 /* Returns the size of the copied struct. */
1536 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1537 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1539 memcpy(&(data->rcvinfo), ptr, num);
1541 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1542 /* Returns the size of the copied struct. */
1543 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1544 num = sizeof(struct bio_dgram_sctp_prinfo);
1546 memcpy(ptr, &(data->prinfo), num);
1549 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1550 /* Returns the size of the copied struct. */
1551 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1552 num = sizeof(struct bio_dgram_sctp_prinfo);
1554 memcpy(&(data->prinfo), ptr, num);
1556 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1557 /* Returns always 1. */
1559 data->save_shutdown = 1;
1561 data->save_shutdown = 0;
1566 * Pass to default ctrl function to process SCTP unspecific commands
1568 ret = dgram_ctrl(b, cmd, num, ptr);
1574 int BIO_dgram_sctp_notification_cb(BIO *b,
1575 void (*handle_notifications) (BIO *bio,
1581 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1583 if (handle_notifications != NULL) {
1584 data->handle_notifications = handle_notifications;
1585 data->notification_context = context;
1593 * BIO_dgram_sctp_wait_for_dry - Wait for SCTP SENDER_DRY event
1594 * @b: The BIO to check for the dry event
1596 * Wait until the peer confirms all packets have been received, and so that
1597 * our kernel doesn't have anything to send anymore. This is only received by
1598 * the peer's kernel, not the application.
1602 * 0 when not dry yet
1605 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1610 union sctp_notification snp;
1614 struct sctp_event event;
1616 struct sctp_event_subscribe event;
1617 socklen_t eventsize;
1619 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1621 /* set sender dry event */
1623 memset(&event, 0, sizeof(event));
1624 event.se_assoc_id = 0;
1625 event.se_type = SCTP_SENDER_DRY_EVENT;
1628 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1629 sizeof(struct sctp_event));
1631 eventsize = sizeof(struct sctp_event_subscribe);
1632 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1636 event.sctp_sender_dry_event = 1;
1639 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1640 sizeof(struct sctp_event_subscribe));
1645 /* peek for notification */
1646 memset(&snp, 0, sizeof(snp));
1647 iov.iov_base = (char *)&snp;
1648 iov.iov_len = sizeof(union sctp_notification);
1649 msg.msg_name = NULL;
1650 msg.msg_namelen = 0;
1653 msg.msg_control = NULL;
1654 msg.msg_controllen = 0;
1657 n = recvmsg(b->num, &msg, MSG_PEEK);
1659 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1660 && (get_last_socket_error() != EWOULDBLOCK))
1666 /* if we find a notification, process it and try again if necessary */
1667 while (msg.msg_flags & MSG_NOTIFICATION) {
1668 memset(&snp, 0, sizeof(snp));
1669 iov.iov_base = (char *)&snp;
1670 iov.iov_len = sizeof(union sctp_notification);
1671 msg.msg_name = NULL;
1672 msg.msg_namelen = 0;
1675 msg.msg_control = NULL;
1676 msg.msg_controllen = 0;
1679 n = recvmsg(b->num, &msg, 0);
1681 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1682 && (get_last_socket_error() != EWOULDBLOCK))
1688 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1691 /* disable sender dry event */
1693 memset(&event, 0, sizeof(event));
1694 event.se_assoc_id = 0;
1695 event.se_type = SCTP_SENDER_DRY_EVENT;
1698 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1699 sizeof(struct sctp_event));
1701 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1703 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1708 event.sctp_sender_dry_event = 0;
1711 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1712 sizeof(struct sctp_event_subscribe));
1717 # ifdef SCTP_AUTHENTICATION_EVENT
1718 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1719 dgram_sctp_handle_auth_free_key_event(b, &snp);
1722 if (data->handle_notifications != NULL)
1723 data->handle_notifications(b, data->notification_context,
1726 /* found notification, peek again */
1727 memset(&snp, 0, sizeof(snp));
1728 iov.iov_base = (char *)&snp;
1729 iov.iov_len = sizeof(union sctp_notification);
1730 msg.msg_name = NULL;
1731 msg.msg_namelen = 0;
1734 msg.msg_control = NULL;
1735 msg.msg_controllen = 0;
1738 /* if we have seen the dry already, don't wait */
1740 sockflags = fcntl(b->num, F_GETFL, 0);
1741 fcntl(b->num, F_SETFL, O_NONBLOCK);
1744 n = recvmsg(b->num, &msg, MSG_PEEK);
1747 fcntl(b->num, F_SETFL, sockflags);
1751 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1752 && (get_last_socket_error() != EWOULDBLOCK))
1759 /* read anything else */
1763 int BIO_dgram_sctp_msg_waiting(BIO *b)
1766 union sctp_notification snp;
1769 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1771 /* Check if there are any messages waiting to be read */
1773 memset(&snp, 0, sizeof(snp));
1774 iov.iov_base = (char *)&snp;
1775 iov.iov_len = sizeof(union sctp_notification);
1776 msg.msg_name = NULL;
1777 msg.msg_namelen = 0;
1780 msg.msg_control = NULL;
1781 msg.msg_controllen = 0;
1784 sockflags = fcntl(b->num, F_GETFL, 0);
1785 fcntl(b->num, F_SETFL, O_NONBLOCK);
1786 n = recvmsg(b->num, &msg, MSG_PEEK);
1787 fcntl(b->num, F_SETFL, sockflags);
1789 /* if notification, process and try again */
1790 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1791 # ifdef SCTP_AUTHENTICATION_EVENT
1792 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1793 dgram_sctp_handle_auth_free_key_event(b, &snp);
1796 memset(&snp, 0, sizeof(snp));
1797 iov.iov_base = (char *)&snp;
1798 iov.iov_len = sizeof(union sctp_notification);
1799 msg.msg_name = NULL;
1800 msg.msg_namelen = 0;
1803 msg.msg_control = NULL;
1804 msg.msg_controllen = 0;
1806 n = recvmsg(b->num, &msg, 0);
1808 if (data->handle_notifications != NULL)
1809 data->handle_notifications(b, data->notification_context,
1813 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1815 /* Return 1 if there is a message to be read, return 0 otherwise. */
1822 static int dgram_sctp_puts(BIO *bp, const char *str)
1827 ret = dgram_sctp_write(bp, str, n);
1832 static int BIO_dgram_should_retry(int i)
1836 if ((i == 0) || (i == -1)) {
1837 err = get_last_socket_error();
1839 # if defined(OPENSSL_SYS_WINDOWS)
1841 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1842 * this point, the error code was overwritten by another system call
1843 * before this error handling is called.
1847 return (BIO_dgram_non_fatal_error(err));
1852 int BIO_dgram_non_fatal_error(int err)
1855 # if defined(OPENSSL_SYS_WINDOWS)
1856 # if defined(WSAEWOULDBLOCK)
1857 case WSAEWOULDBLOCK:
1862 # ifdef WSAEWOULDBLOCK
1863 # if WSAEWOULDBLOCK != EWOULDBLOCK
1876 # if EWOULDBLOCK != EAGAIN
1900 static void get_current_time(struct timeval *t)
1902 # if defined(_WIN32)
1905 unsigned __int64 ul;
1910 SystemTimeToFileTime(&st, &now.ft);
1912 now.ul -= 116444736000000000ULL;
1914 now.ul -= 116444736000000000UI64; /* re-bias to 1/1/1970 */
1916 t->tv_sec = (long)(now.ul / 10000000);
1917 t->tv_usec = ((int)(now.ul % 10000000)) / 10;
1919 gettimeofday(t, NULL);