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
16 # if !(defined(_WIN32) || defined(OPENSSL_SYS_VMS))
17 # include <sys/time.h>
19 # if defined(OPENSSL_SYS_VMS)
20 # include <sys/timeb.h>
23 # ifndef OPENSSL_NO_SCTP
24 # include <netinet/sctp.h>
26 # define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
27 # define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
30 # if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
31 # define IP_MTU 14 /* linux is lame */
34 # if OPENSSL_USE_IPV6 && !defined(IPPROTO_IPV6)
35 # define IPPROTO_IPV6 41 /* windows is lame */
38 # if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
39 /* Standard definition causes type-punning problems. */
40 # undef IN6_IS_ADDR_V4MAPPED
41 # define s6_addr32 __u6_addr.__u6_addr32
42 # define IN6_IS_ADDR_V4MAPPED(a) \
43 (((a)->s6_addr32[0] == 0) && \
44 ((a)->s6_addr32[1] == 0) && \
45 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
48 static int dgram_write(BIO *h, const char *buf, int num);
49 static int dgram_read(BIO *h, char *buf, int size);
50 static int dgram_puts(BIO *h, const char *str);
51 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
52 static int dgram_new(BIO *h);
53 static int dgram_free(BIO *data);
54 static int dgram_clear(BIO *bio);
56 # ifndef OPENSSL_NO_SCTP
57 static int dgram_sctp_write(BIO *h, const char *buf, int num);
58 static int dgram_sctp_read(BIO *h, char *buf, int size);
59 static int dgram_sctp_puts(BIO *h, const char *str);
60 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
61 static int dgram_sctp_new(BIO *h);
62 static int dgram_sctp_free(BIO *data);
63 # ifdef SCTP_AUTHENTICATION_EVENT
64 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification
69 static int BIO_dgram_should_retry(int s);
71 static void get_current_time(struct timeval *t);
73 static const BIO_METHOD methods_dgramp = {
76 /* TODO: Convert to new style write function */
79 /* TODO: Convert to new style read function */
83 NULL, /* dgram_gets, */
90 # ifndef OPENSSL_NO_SCTP
91 static const BIO_METHOD methods_dgramp_sctp = {
93 "datagram sctp socket",
97 NULL, /* dgram_gets, */
105 typedef struct bio_dgram_data_st {
107 unsigned int connected;
110 struct timeval next_timeout;
111 struct timeval socket_timeout;
112 unsigned int peekmode;
115 # ifndef OPENSSL_NO_SCTP
116 typedef struct bio_dgram_sctp_save_message_st {
120 } bio_dgram_sctp_save_message;
122 typedef struct bio_dgram_sctp_data_st {
124 unsigned int connected;
127 struct bio_dgram_sctp_sndinfo sndinfo;
128 struct bio_dgram_sctp_rcvinfo rcvinfo;
129 struct bio_dgram_sctp_prinfo prinfo;
130 void (*handle_notifications) (BIO *bio, void *context, void *buf);
131 void *notification_context;
136 int peer_auth_tested;
137 bio_dgram_sctp_save_message saved_message;
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));
846 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
848 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
849 sizeof(struct sctp_authchunk));
856 * Test if activation was successful. When using accept(), SCTP-AUTH has
857 * to be activated for the listening socket already, otherwise the
858 * connected socket won't use it.
860 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
861 authchunks = OPENSSL_zalloc(sockopt_len);
862 if (authchunks == NULL) {
866 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
869 OPENSSL_free(authchunks);
874 for (p = (unsigned char *)authchunks->gauth_chunks;
875 p < (unsigned char *)authchunks + sockopt_len;
876 p += sizeof(uint8_t)) {
877 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
879 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
883 OPENSSL_free(authchunks);
885 OPENSSL_assert(auth_data);
886 OPENSSL_assert(auth_forward);
888 # ifdef SCTP_AUTHENTICATION_EVENT
890 memset(&event, 0, sizeof(event));
891 event.se_assoc_id = 0;
892 event.se_type = SCTP_AUTHENTICATION_EVENT;
895 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
896 sizeof(struct sctp_event));
902 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
903 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
909 event.sctp_authentication_event = 1;
912 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
913 sizeof(struct sctp_event_subscribe));
922 * Disable partial delivery by setting the min size larger than the max
923 * record size of 2^14 + 2048 + 13
926 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
936 int BIO_dgram_is_sctp(BIO *bio)
938 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
941 static int dgram_sctp_new(BIO *bi)
943 bio_dgram_sctp_data *data = NULL;
947 data = OPENSSL_zalloc(sizeof(*data));
950 # ifdef SCTP_PR_SCTP_NONE
951 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
959 static int dgram_sctp_free(BIO *a)
961 bio_dgram_sctp_data *data;
968 data = (bio_dgram_sctp_data *) a->ptr;
970 OPENSSL_free(data->saved_message.data);
977 # ifdef SCTP_AUTHENTICATION_EVENT
978 void dgram_sctp_handle_auth_free_key_event(BIO *b,
979 union sctp_notification *snp)
982 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
984 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
985 struct sctp_authkeyid authkeyid;
988 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
989 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
990 &authkeyid, sizeof(struct sctp_authkeyid));
995 static int dgram_sctp_read(BIO *b, char *out, int outl)
997 int ret = 0, n = 0, i, optval;
999 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1000 union sctp_notification *snp;
1003 struct cmsghdr *cmsg;
1007 clear_socket_error();
1010 memset(&data->rcvinfo, 0, sizeof(data->rcvinfo));
1013 msg.msg_name = NULL;
1014 msg.msg_namelen = 0;
1017 msg.msg_control = cmsgbuf;
1018 msg.msg_controllen = 512;
1020 n = recvmsg(b->num, &msg, 0);
1028 if (msg.msg_controllen > 0) {
1029 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1030 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1031 if (cmsg->cmsg_level != IPPROTO_SCTP)
1033 # ifdef SCTP_RCVINFO
1034 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1035 struct sctp_rcvinfo *rcvinfo;
1037 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1038 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1039 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1040 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1041 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1042 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1043 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1044 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1048 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1049 struct sctp_sndrcvinfo *sndrcvinfo;
1052 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1053 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1054 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1055 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1056 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1057 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1058 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1059 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1065 if (msg.msg_flags & MSG_NOTIFICATION) {
1066 snp = (union sctp_notification *)out;
1067 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1069 struct sctp_event event;
1071 struct sctp_event_subscribe event;
1072 socklen_t eventsize;
1075 * If a message has been delayed until the socket is dry,
1076 * it can be sent now.
1078 if (data->saved_message.length > 0) {
1079 i = dgram_sctp_write(data->saved_message.bio,
1080 data->saved_message.data,
1081 data->saved_message.length);
1086 OPENSSL_free(data->saved_message.data);
1087 data->saved_message.data = NULL;
1088 data->saved_message.length = 0;
1091 /* disable sender dry event */
1093 memset(&event, 0, sizeof(event));
1094 event.se_assoc_id = 0;
1095 event.se_type = SCTP_SENDER_DRY_EVENT;
1097 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1098 sizeof(struct sctp_event));
1104 eventsize = sizeof(struct sctp_event_subscribe);
1105 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1112 event.sctp_sender_dry_event = 0;
1114 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1115 sizeof(struct sctp_event_subscribe));
1122 # ifdef SCTP_AUTHENTICATION_EVENT
1123 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1124 dgram_sctp_handle_auth_free_key_event(b, snp);
1127 if (data->handle_notifications != NULL)
1128 data->handle_notifications(b, data->notification_context,
1131 memset(out, 0, outl);
1135 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1138 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1139 /* Partial message read, this should never happen! */
1142 * The buffer was too small, this means the peer sent a message
1143 * that was larger than allowed.
1149 * Test if socket buffer can handle max record size (2^14 + 2048
1152 optlen = (socklen_t) sizeof(int);
1153 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1155 OPENSSL_assert(optval >= 18445);
1158 * Test if SCTP doesn't partially deliver below max record size
1159 * (2^14 + 2048 + 13)
1161 optlen = (socklen_t) sizeof(int);
1163 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1166 OPENSSL_assert(optval >= 18445);
1169 * Partially delivered notification??? Probably a bug....
1171 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1174 * Everything seems ok till now, so it's most likely a message
1175 * dropped by PR-SCTP.
1177 memset(out, 0, outl);
1178 BIO_set_retry_read(b);
1182 BIO_clear_retry_flags(b);
1184 if (BIO_dgram_should_retry(ret)) {
1185 BIO_set_retry_read(b);
1186 data->_errno = get_last_socket_error();
1190 /* Test if peer uses SCTP-AUTH before continuing */
1191 if (!data->peer_auth_tested) {
1192 int ii, auth_data = 0, auth_forward = 0;
1194 struct sctp_authchunks *authchunks;
1197 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1198 authchunks = OPENSSL_malloc(optlen);
1199 if (authchunks == NULL) {
1200 BIOerr(BIO_F_DGRAM_SCTP_READ, ERR_R_MALLOC_FAILURE);
1203 memset(authchunks, 0, optlen);
1204 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1205 authchunks, &optlen);
1208 for (p = (unsigned char *)authchunks->gauth_chunks;
1209 p < (unsigned char *)authchunks + optlen;
1210 p += sizeof(uint8_t)) {
1211 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1213 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1217 OPENSSL_free(authchunks);
1219 if (!auth_data || !auth_forward) {
1220 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1224 data->peer_auth_tested = 1;
1231 * dgram_sctp_write - send message on SCTP socket
1232 * @b: BIO to write to
1234 * @inl: amount of bytes in @in to send
1236 * Returns -1 on error or the sent amount of bytes on success
1238 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1241 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1242 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1243 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1244 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1245 struct iovec iov[1];
1247 struct cmsghdr *cmsg;
1248 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1249 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1250 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1251 struct sctp_sndinfo *sndinfo;
1252 struct sctp_prinfo *prinfo;
1254 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1255 struct sctp_sndrcvinfo *sndrcvinfo;
1258 clear_socket_error();
1261 * If we're send anything else than application data, disable all user
1262 * parameters and flags.
1265 memset(&handshake_sinfo, 0, sizeof(handshake_sinfo));
1266 # ifdef SCTP_SACK_IMMEDIATELY
1267 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1269 sinfo = &handshake_sinfo;
1273 * If we have to send a shutdown alert message and the socket is not dry
1274 * yet, we have to save it and send it as soon as the socket gets dry.
1276 if (data->save_shutdown) {
1277 ret = BIO_dgram_sctp_wait_for_dry(b);
1283 data->saved_message.bio = b;
1284 if ((tmp = OPENSSL_malloc(inl)) == NULL) {
1285 BIOerr(BIO_F_DGRAM_SCTP_WRITE, ERR_R_MALLOC_FAILURE);
1288 OPENSSL_free(data->saved_message.data);
1289 data->saved_message.data = tmp;
1290 memcpy(data->saved_message.data, in, inl);
1291 data->saved_message.length = inl;
1296 iov[0].iov_base = (char *)in;
1297 iov[0].iov_len = inl;
1298 msg.msg_name = NULL;
1299 msg.msg_namelen = 0;
1302 msg.msg_control = (caddr_t) cmsgbuf;
1303 msg.msg_controllen = 0;
1305 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1306 cmsg = (struct cmsghdr *)cmsgbuf;
1307 cmsg->cmsg_level = IPPROTO_SCTP;
1308 cmsg->cmsg_type = SCTP_SNDINFO;
1309 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1310 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1311 memset(sndinfo, 0, sizeof(*sndinfo));
1312 sndinfo->snd_sid = sinfo->snd_sid;
1313 sndinfo->snd_flags = sinfo->snd_flags;
1314 sndinfo->snd_ppid = sinfo->snd_ppid;
1315 sndinfo->snd_context = sinfo->snd_context;
1316 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1319 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1320 cmsg->cmsg_level = IPPROTO_SCTP;
1321 cmsg->cmsg_type = SCTP_PRINFO;
1322 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1323 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1324 memset(prinfo, 0, sizeof(*prinfo));
1325 prinfo->pr_policy = pinfo->pr_policy;
1326 prinfo->pr_value = pinfo->pr_value;
1327 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1329 cmsg = (struct cmsghdr *)cmsgbuf;
1330 cmsg->cmsg_level = IPPROTO_SCTP;
1331 cmsg->cmsg_type = SCTP_SNDRCV;
1332 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1333 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1334 memset(sndrcvinfo, 0, sizeof(*sndrcvinfo));
1335 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1336 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1338 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1340 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1341 sndrcvinfo->sinfo_context = sinfo->snd_context;
1342 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1343 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1346 ret = sendmsg(b->num, &msg, 0);
1348 BIO_clear_retry_flags(b);
1350 if (BIO_dgram_should_retry(ret)) {
1351 BIO_set_retry_write(b);
1352 data->_errno = get_last_socket_error();
1358 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1361 bio_dgram_sctp_data *data = NULL;
1362 socklen_t sockopt_len = 0;
1363 struct sctp_authkeyid authkeyid;
1364 struct sctp_authkey *authkey = NULL;
1366 data = (bio_dgram_sctp_data *) b->ptr;
1369 case BIO_CTRL_DGRAM_QUERY_MTU:
1371 * Set to maximum (2^14) and ignore user input to enable transport
1372 * protocol fragmentation. Returns always 2^14.
1377 case BIO_CTRL_DGRAM_SET_MTU:
1379 * Set to maximum (2^14) and ignore input to enable transport
1380 * protocol fragmentation. Returns always 2^14.
1385 case BIO_CTRL_DGRAM_SET_CONNECTED:
1386 case BIO_CTRL_DGRAM_CONNECT:
1387 /* Returns always -1. */
1390 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1392 * SCTP doesn't need the DTLS timer Returns always 1.
1395 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1397 * We allow transport protocol fragmentation so this is irrelevant
1401 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1403 data->in_handshake = 1;
1405 data->in_handshake = 0;
1408 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1409 &data->in_handshake, sizeof(int));
1411 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1413 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1416 /* Get active key */
1417 sockopt_len = sizeof(struct sctp_authkeyid);
1419 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1425 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1426 authkey = OPENSSL_malloc(sockopt_len);
1427 if (authkey == NULL) {
1431 memset(authkey, 0, sockopt_len);
1432 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1433 # ifndef __FreeBSD__
1435 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1436 * and higher work without it.
1438 authkey->sca_keylength = 64;
1440 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1443 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1445 OPENSSL_free(authkey);
1450 /* Reset active key */
1451 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1452 &authkeyid, sizeof(struct sctp_authkeyid));
1457 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1458 /* Returns 0 on success, -1 otherwise. */
1460 /* Get active key */
1461 sockopt_len = sizeof(struct sctp_authkeyid);
1463 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1468 /* Set active key */
1469 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1470 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1471 &authkeyid, sizeof(struct sctp_authkeyid));
1476 * CCS has been sent, so remember that and fall through to check if
1477 * we need to deactivate an old key
1481 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1482 /* Returns 0 on success, -1 otherwise. */
1485 * Has this command really been called or is this just a
1488 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1492 * CSS has been both, received and sent, so deactivate an old key
1494 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1495 /* Get active key */
1496 sockopt_len = sizeof(struct sctp_authkeyid);
1498 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1499 &authkeyid, &sockopt_len);
1504 * Deactivate key or delete second last key if
1505 * SCTP_AUTHENTICATION_EVENT is not available.
1507 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1508 # ifdef SCTP_AUTH_DEACTIVATE_KEY
1509 sockopt_len = sizeof(struct sctp_authkeyid);
1510 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1511 &authkeyid, sockopt_len);
1515 # ifndef SCTP_AUTHENTICATION_EVENT
1516 if (authkeyid.scact_keynumber > 0) {
1517 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1518 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1519 &authkeyid, sizeof(struct sctp_authkeyid));
1529 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1530 /* Returns the size of the copied struct. */
1531 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1532 num = sizeof(struct bio_dgram_sctp_sndinfo);
1534 memcpy(ptr, &(data->sndinfo), num);
1537 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1538 /* Returns the size of the copied struct. */
1539 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1540 num = sizeof(struct bio_dgram_sctp_sndinfo);
1542 memcpy(&(data->sndinfo), ptr, num);
1544 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1545 /* Returns the size of the copied struct. */
1546 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1547 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1549 memcpy(ptr, &data->rcvinfo, num);
1553 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1554 /* Returns the size of the copied struct. */
1555 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1556 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1558 memcpy(&(data->rcvinfo), ptr, num);
1560 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1561 /* Returns the size of the copied struct. */
1562 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1563 num = sizeof(struct bio_dgram_sctp_prinfo);
1565 memcpy(ptr, &(data->prinfo), num);
1568 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1569 /* Returns the size of the copied struct. */
1570 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1571 num = sizeof(struct bio_dgram_sctp_prinfo);
1573 memcpy(&(data->prinfo), ptr, num);
1575 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1576 /* Returns always 1. */
1578 data->save_shutdown = 1;
1580 data->save_shutdown = 0;
1585 * Pass to default ctrl function to process SCTP unspecific commands
1587 ret = dgram_ctrl(b, cmd, num, ptr);
1593 int BIO_dgram_sctp_notification_cb(BIO *b,
1594 void (*handle_notifications) (BIO *bio,
1600 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1602 if (handle_notifications != NULL) {
1603 data->handle_notifications = handle_notifications;
1604 data->notification_context = context;
1612 * BIO_dgram_sctp_wait_for_dry - Wait for SCTP SENDER_DRY event
1613 * @b: The BIO to check for the dry event
1615 * Wait until the peer confirms all packets have been received, and so that
1616 * our kernel doesn't have anything to send anymore. This is only received by
1617 * the peer's kernel, not the application.
1621 * 0 when not dry yet
1624 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1629 union sctp_notification snp;
1633 struct sctp_event event;
1635 struct sctp_event_subscribe event;
1636 socklen_t eventsize;
1638 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1640 /* set sender dry event */
1642 memset(&event, 0, sizeof(event));
1643 event.se_assoc_id = 0;
1644 event.se_type = SCTP_SENDER_DRY_EVENT;
1647 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1648 sizeof(struct sctp_event));
1650 eventsize = sizeof(struct sctp_event_subscribe);
1651 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1655 event.sctp_sender_dry_event = 1;
1658 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1659 sizeof(struct sctp_event_subscribe));
1664 /* peek for notification */
1665 memset(&snp, 0, sizeof(snp));
1666 iov.iov_base = (char *)&snp;
1667 iov.iov_len = sizeof(union sctp_notification);
1668 msg.msg_name = NULL;
1669 msg.msg_namelen = 0;
1672 msg.msg_control = NULL;
1673 msg.msg_controllen = 0;
1676 n = recvmsg(b->num, &msg, MSG_PEEK);
1678 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1679 && (get_last_socket_error() != EWOULDBLOCK))
1685 /* if we find a notification, process it and try again if necessary */
1686 while (msg.msg_flags & MSG_NOTIFICATION) {
1687 memset(&snp, 0, sizeof(snp));
1688 iov.iov_base = (char *)&snp;
1689 iov.iov_len = sizeof(union sctp_notification);
1690 msg.msg_name = NULL;
1691 msg.msg_namelen = 0;
1694 msg.msg_control = NULL;
1695 msg.msg_controllen = 0;
1698 n = recvmsg(b->num, &msg, 0);
1700 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1701 && (get_last_socket_error() != EWOULDBLOCK))
1707 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1710 /* disable sender dry event */
1712 memset(&event, 0, sizeof(event));
1713 event.se_assoc_id = 0;
1714 event.se_type = SCTP_SENDER_DRY_EVENT;
1717 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1718 sizeof(struct sctp_event));
1720 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1722 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1727 event.sctp_sender_dry_event = 0;
1730 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1731 sizeof(struct sctp_event_subscribe));
1736 # ifdef SCTP_AUTHENTICATION_EVENT
1737 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1738 dgram_sctp_handle_auth_free_key_event(b, &snp);
1741 if (data->handle_notifications != NULL)
1742 data->handle_notifications(b, data->notification_context,
1745 /* found notification, peek again */
1746 memset(&snp, 0, sizeof(snp));
1747 iov.iov_base = (char *)&snp;
1748 iov.iov_len = sizeof(union sctp_notification);
1749 msg.msg_name = NULL;
1750 msg.msg_namelen = 0;
1753 msg.msg_control = NULL;
1754 msg.msg_controllen = 0;
1757 /* if we have seen the dry already, don't wait */
1759 sockflags = fcntl(b->num, F_GETFL, 0);
1760 fcntl(b->num, F_SETFL, O_NONBLOCK);
1763 n = recvmsg(b->num, &msg, MSG_PEEK);
1766 fcntl(b->num, F_SETFL, sockflags);
1770 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1771 && (get_last_socket_error() != EWOULDBLOCK))
1778 /* read anything else */
1782 int BIO_dgram_sctp_msg_waiting(BIO *b)
1785 union sctp_notification snp;
1788 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1790 /* Check if there are any messages waiting to be read */
1792 memset(&snp, 0, sizeof(snp));
1793 iov.iov_base = (char *)&snp;
1794 iov.iov_len = sizeof(union sctp_notification);
1795 msg.msg_name = NULL;
1796 msg.msg_namelen = 0;
1799 msg.msg_control = NULL;
1800 msg.msg_controllen = 0;
1803 sockflags = fcntl(b->num, F_GETFL, 0);
1804 fcntl(b->num, F_SETFL, O_NONBLOCK);
1805 n = recvmsg(b->num, &msg, MSG_PEEK);
1806 fcntl(b->num, F_SETFL, sockflags);
1808 /* if notification, process and try again */
1809 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1810 # ifdef SCTP_AUTHENTICATION_EVENT
1811 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1812 dgram_sctp_handle_auth_free_key_event(b, &snp);
1815 memset(&snp, 0, sizeof(snp));
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;
1825 n = recvmsg(b->num, &msg, 0);
1827 if (data->handle_notifications != NULL)
1828 data->handle_notifications(b, data->notification_context,
1832 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1834 /* Return 1 if there is a message to be read, return 0 otherwise. */
1841 static int dgram_sctp_puts(BIO *bp, const char *str)
1846 ret = dgram_sctp_write(bp, str, n);
1851 static int BIO_dgram_should_retry(int i)
1855 if ((i == 0) || (i == -1)) {
1856 err = get_last_socket_error();
1858 # if defined(OPENSSL_SYS_WINDOWS)
1860 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1861 * this point, the error code was overwritten by another system call
1862 * before this error handling is called.
1866 return (BIO_dgram_non_fatal_error(err));
1871 int BIO_dgram_non_fatal_error(int err)
1874 # if defined(OPENSSL_SYS_WINDOWS)
1875 # if defined(WSAEWOULDBLOCK)
1876 case WSAEWOULDBLOCK:
1881 # ifdef WSAEWOULDBLOCK
1882 # if WSAEWOULDBLOCK != EWOULDBLOCK
1895 # if EWOULDBLOCK != EAGAIN
1920 static void get_current_time(struct timeval *t)
1922 # if defined(_WIN32)
1925 unsigned __int64 ul;
1930 SystemTimeToFileTime(&st, &now.ft);
1932 now.ul -= 116444736000000000ULL;
1934 now.ul -= 116444736000000000UI64; /* re-bias to 1/1/1970 */
1936 t->tv_sec = (long)(now.ul / 10000000);
1937 t->tv_usec = ((int)(now.ul % 10000000)) / 10;
1938 # elif defined(OPENSSL_SYS_VMS)
1941 t->tv_sec = (long)tb.time;
1942 t->tv_usec = (long)tb.millitm * 1000;
1944 gettimeofday(t, NULL);