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 = {
79 NULL, /* dgram_gets, */
86 # ifndef OPENSSL_NO_SCTP
87 static const BIO_METHOD methods_dgramp_sctp = {
89 "datagram sctp socket",
93 NULL, /* dgram_gets, */
101 typedef struct bio_dgram_data_st {
103 unsigned int connected;
106 struct timeval next_timeout;
107 struct timeval socket_timeout;
108 unsigned int peekmode;
111 # ifndef OPENSSL_NO_SCTP
112 typedef struct bio_dgram_sctp_save_message_st {
116 } bio_dgram_sctp_save_message;
118 typedef struct bio_dgram_sctp_data_st {
120 unsigned int connected;
123 struct bio_dgram_sctp_sndinfo sndinfo;
124 struct bio_dgram_sctp_rcvinfo rcvinfo;
125 struct bio_dgram_sctp_prinfo prinfo;
126 void (*handle_notifications) (BIO *bio, void *context, void *buf);
127 void *notification_context;
132 int peer_auth_tested;
133 bio_dgram_sctp_save_message saved_message;
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);
786 case BIO_CTRL_DGRAM_SET_PEEK_MODE:
787 data->peekmode = (unsigned int)num;
796 static int dgram_puts(BIO *bp, const char *str)
801 ret = dgram_write(bp, str, n);
805 # ifndef OPENSSL_NO_SCTP
806 const BIO_METHOD *BIO_s_datagram_sctp(void)
808 return (&methods_dgramp_sctp);
811 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
814 int ret, optval = 20000;
815 int auth_data = 0, auth_forward = 0;
817 struct sctp_authchunk auth;
818 struct sctp_authchunks *authchunks;
819 socklen_t sockopt_len;
820 # ifdef SCTP_AUTHENTICATION_EVENT
822 struct sctp_event event;
824 struct sctp_event_subscribe event;
828 bio = BIO_new(BIO_s_datagram_sctp());
831 BIO_set_fd(bio, fd, close_flag);
833 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
834 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
836 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
837 sizeof(struct sctp_authchunk));
842 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
844 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
845 sizeof(struct sctp_authchunk));
852 * Test if activation was successful. When using accept(), SCTP-AUTH has
853 * to be activated for the listening socket already, otherwise the
854 * connected socket won't use it.
856 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
857 authchunks = OPENSSL_zalloc(sockopt_len);
858 if (authchunks == NULL) {
862 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
865 OPENSSL_free(authchunks);
870 for (p = (unsigned char *)authchunks->gauth_chunks;
871 p < (unsigned char *)authchunks + sockopt_len;
872 p += sizeof(uint8_t)) {
873 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
875 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
879 OPENSSL_free(authchunks);
881 OPENSSL_assert(auth_data);
882 OPENSSL_assert(auth_forward);
884 # ifdef SCTP_AUTHENTICATION_EVENT
886 memset(&event, 0, sizeof(event));
887 event.se_assoc_id = 0;
888 event.se_type = SCTP_AUTHENTICATION_EVENT;
891 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
892 sizeof(struct sctp_event));
898 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
899 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
905 event.sctp_authentication_event = 1;
908 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
909 sizeof(struct sctp_event_subscribe));
918 * Disable partial delivery by setting the min size larger than the max
919 * record size of 2^14 + 2048 + 13
922 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
932 int BIO_dgram_is_sctp(BIO *bio)
934 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
937 static int dgram_sctp_new(BIO *bi)
939 bio_dgram_sctp_data *data = NULL;
943 data = OPENSSL_zalloc(sizeof(*data));
946 # ifdef SCTP_PR_SCTP_NONE
947 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
955 static int dgram_sctp_free(BIO *a)
957 bio_dgram_sctp_data *data;
964 data = (bio_dgram_sctp_data *) a->ptr;
966 OPENSSL_free(data->saved_message.data);
973 # ifdef SCTP_AUTHENTICATION_EVENT
974 void dgram_sctp_handle_auth_free_key_event(BIO *b,
975 union sctp_notification *snp)
978 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
980 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
981 struct sctp_authkeyid authkeyid;
984 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
985 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
986 &authkeyid, sizeof(struct sctp_authkeyid));
991 static int dgram_sctp_read(BIO *b, char *out, int outl)
993 int ret = 0, n = 0, i, optval;
995 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
996 union sctp_notification *snp;
999 struct cmsghdr *cmsg;
1003 clear_socket_error();
1006 memset(&data->rcvinfo, 0, sizeof(data->rcvinfo));
1009 msg.msg_name = NULL;
1010 msg.msg_namelen = 0;
1013 msg.msg_control = cmsgbuf;
1014 msg.msg_controllen = 512;
1016 n = recvmsg(b->num, &msg, 0);
1024 if (msg.msg_controllen > 0) {
1025 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1026 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1027 if (cmsg->cmsg_level != IPPROTO_SCTP)
1029 # ifdef SCTP_RCVINFO
1030 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1031 struct sctp_rcvinfo *rcvinfo;
1033 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1034 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1035 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1036 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1037 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1038 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1039 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1040 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1044 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1045 struct sctp_sndrcvinfo *sndrcvinfo;
1048 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1049 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1050 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1051 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1052 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1053 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1054 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1055 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1061 if (msg.msg_flags & MSG_NOTIFICATION) {
1062 snp = (union sctp_notification *)out;
1063 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1065 struct sctp_event event;
1067 struct sctp_event_subscribe event;
1068 socklen_t eventsize;
1071 * If a message has been delayed until the socket is dry,
1072 * it can be sent now.
1074 if (data->saved_message.length > 0) {
1075 i = dgram_sctp_write(data->saved_message.bio,
1076 data->saved_message.data,
1077 data->saved_message.length);
1082 OPENSSL_free(data->saved_message.data);
1083 data->saved_message.data = NULL;
1084 data->saved_message.length = 0;
1087 /* disable sender dry event */
1089 memset(&event, 0, sizeof(event));
1090 event.se_assoc_id = 0;
1091 event.se_type = SCTP_SENDER_DRY_EVENT;
1093 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1094 sizeof(struct sctp_event));
1100 eventsize = sizeof(struct sctp_event_subscribe);
1101 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1108 event.sctp_sender_dry_event = 0;
1110 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1111 sizeof(struct sctp_event_subscribe));
1118 # ifdef SCTP_AUTHENTICATION_EVENT
1119 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1120 dgram_sctp_handle_auth_free_key_event(b, snp);
1123 if (data->handle_notifications != NULL)
1124 data->handle_notifications(b, data->notification_context,
1127 memset(out, 0, outl);
1131 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1134 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1135 /* Partial message read, this should never happen! */
1138 * The buffer was too small, this means the peer sent a message
1139 * that was larger than allowed.
1145 * Test if socket buffer can handle max record size (2^14 + 2048
1148 optlen = (socklen_t) sizeof(int);
1149 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1151 OPENSSL_assert(optval >= 18445);
1154 * Test if SCTP doesn't partially deliver below max record size
1155 * (2^14 + 2048 + 13)
1157 optlen = (socklen_t) sizeof(int);
1159 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1162 OPENSSL_assert(optval >= 18445);
1165 * Partially delivered notification??? Probably a bug....
1167 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1170 * Everything seems ok till now, so it's most likely a message
1171 * dropped by PR-SCTP.
1173 memset(out, 0, outl);
1174 BIO_set_retry_read(b);
1178 BIO_clear_retry_flags(b);
1180 if (BIO_dgram_should_retry(ret)) {
1181 BIO_set_retry_read(b);
1182 data->_errno = get_last_socket_error();
1186 /* Test if peer uses SCTP-AUTH before continuing */
1187 if (!data->peer_auth_tested) {
1188 int ii, auth_data = 0, auth_forward = 0;
1190 struct sctp_authchunks *authchunks;
1193 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1194 authchunks = OPENSSL_malloc(optlen);
1195 if (authchunks == NULL) {
1196 BIOerr(BIO_F_DGRAM_SCTP_READ, ERR_R_MALLOC_FAILURE);
1199 memset(authchunks, 0, optlen);
1200 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1201 authchunks, &optlen);
1204 for (p = (unsigned char *)authchunks->gauth_chunks;
1205 p < (unsigned char *)authchunks + optlen;
1206 p += sizeof(uint8_t)) {
1207 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1209 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1213 OPENSSL_free(authchunks);
1215 if (!auth_data || !auth_forward) {
1216 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1220 data->peer_auth_tested = 1;
1227 * dgram_sctp_write - send message on SCTP socket
1228 * @b: BIO to write to
1230 * @inl: amount of bytes in @in to send
1232 * Returns -1 on error or the sent amount of bytes on success
1234 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1237 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1238 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1239 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1240 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1241 struct iovec iov[1];
1243 struct cmsghdr *cmsg;
1244 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1245 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1246 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1247 struct sctp_sndinfo *sndinfo;
1248 struct sctp_prinfo *prinfo;
1250 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1251 struct sctp_sndrcvinfo *sndrcvinfo;
1254 clear_socket_error();
1257 * If we're send anything else than application data, disable all user
1258 * parameters and flags.
1261 memset(&handshake_sinfo, 0, sizeof(handshake_sinfo));
1262 # ifdef SCTP_SACK_IMMEDIATELY
1263 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1265 sinfo = &handshake_sinfo;
1269 * If we have to send a shutdown alert message and the socket is not dry
1270 * yet, we have to save it and send it as soon as the socket gets dry.
1272 if (data->save_shutdown) {
1273 ret = BIO_dgram_sctp_wait_for_dry(b);
1279 data->saved_message.bio = b;
1280 if ((tmp = OPENSSL_malloc(inl)) == NULL) {
1281 BIOerr(BIO_F_DGRAM_SCTP_WRITE, ERR_R_MALLOC_FAILURE);
1284 OPENSSL_free(data->saved_message.data);
1285 data->saved_message.data = tmp;
1286 memcpy(data->saved_message.data, in, inl);
1287 data->saved_message.length = inl;
1292 iov[0].iov_base = (char *)in;
1293 iov[0].iov_len = inl;
1294 msg.msg_name = NULL;
1295 msg.msg_namelen = 0;
1298 msg.msg_control = (caddr_t) cmsgbuf;
1299 msg.msg_controllen = 0;
1301 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1302 cmsg = (struct cmsghdr *)cmsgbuf;
1303 cmsg->cmsg_level = IPPROTO_SCTP;
1304 cmsg->cmsg_type = SCTP_SNDINFO;
1305 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1306 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1307 memset(sndinfo, 0, sizeof(*sndinfo));
1308 sndinfo->snd_sid = sinfo->snd_sid;
1309 sndinfo->snd_flags = sinfo->snd_flags;
1310 sndinfo->snd_ppid = sinfo->snd_ppid;
1311 sndinfo->snd_context = sinfo->snd_context;
1312 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1315 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1316 cmsg->cmsg_level = IPPROTO_SCTP;
1317 cmsg->cmsg_type = SCTP_PRINFO;
1318 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1319 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1320 memset(prinfo, 0, sizeof(*prinfo));
1321 prinfo->pr_policy = pinfo->pr_policy;
1322 prinfo->pr_value = pinfo->pr_value;
1323 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1325 cmsg = (struct cmsghdr *)cmsgbuf;
1326 cmsg->cmsg_level = IPPROTO_SCTP;
1327 cmsg->cmsg_type = SCTP_SNDRCV;
1328 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1329 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1330 memset(sndrcvinfo, 0, sizeof(*sndrcvinfo));
1331 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1332 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1334 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1336 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1337 sndrcvinfo->sinfo_context = sinfo->snd_context;
1338 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1339 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1342 ret = sendmsg(b->num, &msg, 0);
1344 BIO_clear_retry_flags(b);
1346 if (BIO_dgram_should_retry(ret)) {
1347 BIO_set_retry_write(b);
1348 data->_errno = get_last_socket_error();
1354 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1357 bio_dgram_sctp_data *data = NULL;
1358 socklen_t sockopt_len = 0;
1359 struct sctp_authkeyid authkeyid;
1360 struct sctp_authkey *authkey = NULL;
1362 data = (bio_dgram_sctp_data *) b->ptr;
1365 case BIO_CTRL_DGRAM_QUERY_MTU:
1367 * Set to maximum (2^14) and ignore user input to enable transport
1368 * protocol fragmentation. Returns always 2^14.
1373 case BIO_CTRL_DGRAM_SET_MTU:
1375 * Set to maximum (2^14) and ignore input to enable transport
1376 * protocol fragmentation. Returns always 2^14.
1381 case BIO_CTRL_DGRAM_SET_CONNECTED:
1382 case BIO_CTRL_DGRAM_CONNECT:
1383 /* Returns always -1. */
1386 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1388 * SCTP doesn't need the DTLS timer Returns always 1.
1391 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1393 * We allow transport protocol fragmentation so this is irrelevant
1397 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1399 data->in_handshake = 1;
1401 data->in_handshake = 0;
1404 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1405 &data->in_handshake, sizeof(int));
1407 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1409 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1412 /* Get active key */
1413 sockopt_len = sizeof(struct sctp_authkeyid);
1415 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1421 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1422 authkey = OPENSSL_malloc(sockopt_len);
1423 if (authkey == NULL) {
1427 memset(authkey, 0, sockopt_len);
1428 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1429 # ifndef __FreeBSD__
1431 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1432 * and higher work without it.
1434 authkey->sca_keylength = 64;
1436 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1439 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1441 OPENSSL_free(authkey);
1446 /* Reset active key */
1447 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1448 &authkeyid, sizeof(struct sctp_authkeyid));
1453 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1454 /* Returns 0 on success, -1 otherwise. */
1456 /* Get active key */
1457 sockopt_len = sizeof(struct sctp_authkeyid);
1459 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1464 /* Set active key */
1465 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1466 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1467 &authkeyid, sizeof(struct sctp_authkeyid));
1472 * CCS has been sent, so remember that and fall through to check if
1473 * we need to deactivate an old key
1477 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1478 /* Returns 0 on success, -1 otherwise. */
1481 * Has this command really been called or is this just a
1484 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1488 * CSS has been both, received and sent, so deactivate an old key
1490 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1491 /* Get active key */
1492 sockopt_len = sizeof(struct sctp_authkeyid);
1494 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1495 &authkeyid, &sockopt_len);
1500 * Deactivate key or delete second last key if
1501 * SCTP_AUTHENTICATION_EVENT is not available.
1503 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1504 # ifdef SCTP_AUTH_DEACTIVATE_KEY
1505 sockopt_len = sizeof(struct sctp_authkeyid);
1506 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1507 &authkeyid, sockopt_len);
1511 # ifndef SCTP_AUTHENTICATION_EVENT
1512 if (authkeyid.scact_keynumber > 0) {
1513 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1514 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1515 &authkeyid, sizeof(struct sctp_authkeyid));
1525 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1526 /* Returns the size of the copied struct. */
1527 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1528 num = sizeof(struct bio_dgram_sctp_sndinfo);
1530 memcpy(ptr, &(data->sndinfo), num);
1533 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1534 /* Returns the size of the copied struct. */
1535 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1536 num = sizeof(struct bio_dgram_sctp_sndinfo);
1538 memcpy(&(data->sndinfo), ptr, num);
1540 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1541 /* Returns the size of the copied struct. */
1542 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1543 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1545 memcpy(ptr, &data->rcvinfo, num);
1549 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1550 /* Returns the size of the copied struct. */
1551 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1552 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1554 memcpy(&(data->rcvinfo), ptr, num);
1556 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1557 /* Returns the size of the copied struct. */
1558 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1559 num = sizeof(struct bio_dgram_sctp_prinfo);
1561 memcpy(ptr, &(data->prinfo), num);
1564 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1565 /* Returns the size of the copied struct. */
1566 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1567 num = sizeof(struct bio_dgram_sctp_prinfo);
1569 memcpy(&(data->prinfo), ptr, num);
1571 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1572 /* Returns always 1. */
1574 data->save_shutdown = 1;
1576 data->save_shutdown = 0;
1581 * Pass to default ctrl function to process SCTP unspecific commands
1583 ret = dgram_ctrl(b, cmd, num, ptr);
1589 int BIO_dgram_sctp_notification_cb(BIO *b,
1590 void (*handle_notifications) (BIO *bio,
1596 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1598 if (handle_notifications != NULL) {
1599 data->handle_notifications = handle_notifications;
1600 data->notification_context = context;
1608 * BIO_dgram_sctp_wait_for_dry - Wait for SCTP SENDER_DRY event
1609 * @b: The BIO to check for the dry event
1611 * Wait until the peer confirms all packets have been received, and so that
1612 * our kernel doesn't have anything to send anymore. This is only received by
1613 * the peer's kernel, not the application.
1617 * 0 when not dry yet
1620 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1625 union sctp_notification snp;
1629 struct sctp_event event;
1631 struct sctp_event_subscribe event;
1632 socklen_t eventsize;
1634 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1636 /* set sender dry event */
1638 memset(&event, 0, sizeof(event));
1639 event.se_assoc_id = 0;
1640 event.se_type = SCTP_SENDER_DRY_EVENT;
1643 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1644 sizeof(struct sctp_event));
1646 eventsize = sizeof(struct sctp_event_subscribe);
1647 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1651 event.sctp_sender_dry_event = 1;
1654 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1655 sizeof(struct sctp_event_subscribe));
1660 /* peek for notification */
1661 memset(&snp, 0, sizeof(snp));
1662 iov.iov_base = (char *)&snp;
1663 iov.iov_len = sizeof(union sctp_notification);
1664 msg.msg_name = NULL;
1665 msg.msg_namelen = 0;
1668 msg.msg_control = NULL;
1669 msg.msg_controllen = 0;
1672 n = recvmsg(b->num, &msg, MSG_PEEK);
1674 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1675 && (get_last_socket_error() != EWOULDBLOCK))
1681 /* if we find a notification, process it and try again if necessary */
1682 while (msg.msg_flags & MSG_NOTIFICATION) {
1683 memset(&snp, 0, sizeof(snp));
1684 iov.iov_base = (char *)&snp;
1685 iov.iov_len = sizeof(union sctp_notification);
1686 msg.msg_name = NULL;
1687 msg.msg_namelen = 0;
1690 msg.msg_control = NULL;
1691 msg.msg_controllen = 0;
1694 n = recvmsg(b->num, &msg, 0);
1696 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1697 && (get_last_socket_error() != EWOULDBLOCK))
1703 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1706 /* disable sender dry event */
1708 memset(&event, 0, sizeof(event));
1709 event.se_assoc_id = 0;
1710 event.se_type = SCTP_SENDER_DRY_EVENT;
1713 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1714 sizeof(struct sctp_event));
1716 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1718 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1723 event.sctp_sender_dry_event = 0;
1726 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1727 sizeof(struct sctp_event_subscribe));
1732 # ifdef SCTP_AUTHENTICATION_EVENT
1733 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1734 dgram_sctp_handle_auth_free_key_event(b, &snp);
1737 if (data->handle_notifications != NULL)
1738 data->handle_notifications(b, data->notification_context,
1741 /* found notification, peek again */
1742 memset(&snp, 0, sizeof(snp));
1743 iov.iov_base = (char *)&snp;
1744 iov.iov_len = sizeof(union sctp_notification);
1745 msg.msg_name = NULL;
1746 msg.msg_namelen = 0;
1749 msg.msg_control = NULL;
1750 msg.msg_controllen = 0;
1753 /* if we have seen the dry already, don't wait */
1755 sockflags = fcntl(b->num, F_GETFL, 0);
1756 fcntl(b->num, F_SETFL, O_NONBLOCK);
1759 n = recvmsg(b->num, &msg, MSG_PEEK);
1762 fcntl(b->num, F_SETFL, sockflags);
1766 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1767 && (get_last_socket_error() != EWOULDBLOCK))
1774 /* read anything else */
1778 int BIO_dgram_sctp_msg_waiting(BIO *b)
1781 union sctp_notification snp;
1784 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1786 /* Check if there are any messages waiting to be read */
1788 memset(&snp, 0, sizeof(snp));
1789 iov.iov_base = (char *)&snp;
1790 iov.iov_len = sizeof(union sctp_notification);
1791 msg.msg_name = NULL;
1792 msg.msg_namelen = 0;
1795 msg.msg_control = NULL;
1796 msg.msg_controllen = 0;
1799 sockflags = fcntl(b->num, F_GETFL, 0);
1800 fcntl(b->num, F_SETFL, O_NONBLOCK);
1801 n = recvmsg(b->num, &msg, MSG_PEEK);
1802 fcntl(b->num, F_SETFL, sockflags);
1804 /* if notification, process and try again */
1805 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1806 # ifdef SCTP_AUTHENTICATION_EVENT
1807 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1808 dgram_sctp_handle_auth_free_key_event(b, &snp);
1811 memset(&snp, 0, sizeof(snp));
1812 iov.iov_base = (char *)&snp;
1813 iov.iov_len = sizeof(union sctp_notification);
1814 msg.msg_name = NULL;
1815 msg.msg_namelen = 0;
1818 msg.msg_control = NULL;
1819 msg.msg_controllen = 0;
1821 n = recvmsg(b->num, &msg, 0);
1823 if (data->handle_notifications != NULL)
1824 data->handle_notifications(b, data->notification_context,
1828 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1830 /* Return 1 if there is a message to be read, return 0 otherwise. */
1837 static int dgram_sctp_puts(BIO *bp, const char *str)
1842 ret = dgram_sctp_write(bp, str, n);
1847 static int BIO_dgram_should_retry(int i)
1851 if ((i == 0) || (i == -1)) {
1852 err = get_last_socket_error();
1854 # if defined(OPENSSL_SYS_WINDOWS)
1856 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1857 * this point, the error code was overwritten by another system call
1858 * before this error handling is called.
1862 return (BIO_dgram_non_fatal_error(err));
1867 int BIO_dgram_non_fatal_error(int err)
1870 # if defined(OPENSSL_SYS_WINDOWS)
1871 # if defined(WSAEWOULDBLOCK)
1872 case WSAEWOULDBLOCK:
1877 # ifdef WSAEWOULDBLOCK
1878 # if WSAEWOULDBLOCK != EWOULDBLOCK
1891 # if EWOULDBLOCK != EAGAIN
1916 static void get_current_time(struct timeval *t)
1918 # if defined(_WIN32)
1921 unsigned __int64 ul;
1926 SystemTimeToFileTime(&st, &now.ft);
1928 now.ul -= 116444736000000000ULL;
1930 now.ul -= 116444736000000000UI64; /* re-bias to 1/1/1970 */
1932 t->tv_sec = (long)(now.ul / 10000000);
1933 t->tv_usec = ((int)(now.ul % 10000000)) / 10;
1934 # elif defined(OPENSSL_SYS_VMS)
1937 t->tv_sec = (long)tb.time;
1938 t->tv_usec = (long)tb.millitm * 1000;
1940 gettimeofday(t, NULL);