1 /* crypto/bio/bio_dgram.c */
3 * DTLS implementation written by Nagendra Modadugu
4 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
6 /* ====================================================================
7 * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * openssl-core@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
65 #include <openssl/bio.h>
66 #ifndef OPENSSL_NO_DGRAM
68 # if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS)
69 # include <sys/timeb.h>
72 # ifndef OPENSSL_NO_SCTP
73 # include <netinet/sctp.h>
75 # define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
76 # define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
79 # if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
80 # define IP_MTU 14 /* linux is lame */
83 # if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
84 /* Standard definition causes type-punning problems. */
85 # undef IN6_IS_ADDR_V4MAPPED
86 # define s6_addr32 __u6_addr.__u6_addr32
87 # define IN6_IS_ADDR_V4MAPPED(a) \
88 (((a)->s6_addr32[0] == 0) && \
89 ((a)->s6_addr32[1] == 0) && \
90 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
94 # define sock_write SockWrite /* Watt-32 uses same names */
95 # define sock_read SockRead
96 # define sock_puts SockPuts
99 static int dgram_write(BIO *h, const char *buf, int num);
100 static int dgram_read(BIO *h, char *buf, int size);
101 static int dgram_puts(BIO *h, const char *str);
102 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
103 static int dgram_new(BIO *h);
104 static int dgram_free(BIO *data);
105 static int dgram_clear(BIO *bio);
107 # ifndef OPENSSL_NO_SCTP
108 static int dgram_sctp_write(BIO *h, const char *buf, int num);
109 static int dgram_sctp_read(BIO *h, char *buf, int size);
110 static int dgram_sctp_puts(BIO *h, const char *str);
111 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
112 static int dgram_sctp_new(BIO *h);
113 static int dgram_sctp_free(BIO *data);
114 # ifdef SCTP_AUTHENTICATION_EVENT
115 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification
120 static int BIO_dgram_should_retry(int s);
122 static void get_current_time(struct timeval *t);
124 static BIO_METHOD methods_dgramp = {
130 NULL, /* dgram_gets, */
137 # ifndef OPENSSL_NO_SCTP
138 static BIO_METHOD methods_dgramp_sctp = {
140 "datagram sctp socket",
144 NULL, /* dgram_gets, */
152 typedef struct bio_dgram_data_st {
155 struct sockaddr_in sa_in;
156 # if OPENSSL_USE_IPV6
157 struct sockaddr_in6 sa_in6;
160 unsigned int connected;
163 struct timeval next_timeout;
164 struct timeval socket_timeout;
167 # ifndef OPENSSL_NO_SCTP
168 typedef struct bio_dgram_sctp_save_message_st {
172 } bio_dgram_sctp_save_message;
174 typedef struct bio_dgram_sctp_data_st {
177 struct sockaddr_in sa_in;
178 # if OPENSSL_USE_IPV6
179 struct sockaddr_in6 sa_in6;
182 unsigned int connected;
185 struct bio_dgram_sctp_sndinfo sndinfo;
186 struct bio_dgram_sctp_rcvinfo rcvinfo;
187 struct bio_dgram_sctp_prinfo prinfo;
188 void (*handle_notifications) (BIO *bio, void *context, void *buf);
189 void *notification_context;
194 int peer_auth_tested;
195 bio_dgram_sctp_save_message saved_message;
196 } bio_dgram_sctp_data;
199 BIO_METHOD *BIO_s_datagram(void)
201 return (&methods_dgramp);
204 BIO *BIO_new_dgram(int fd, int close_flag)
208 ret = BIO_new(BIO_s_datagram());
211 BIO_set_fd(ret, fd, close_flag);
215 static int dgram_new(BIO *bi)
217 bio_dgram_data *data = NULL;
221 data = OPENSSL_malloc(sizeof(bio_dgram_data));
224 memset(data, 0x00, sizeof(bio_dgram_data));
231 static int dgram_free(BIO *a)
233 bio_dgram_data *data;
240 data = (bio_dgram_data *)a->ptr;
247 static int dgram_clear(BIO *a)
261 static void dgram_adjust_rcv_timeout(BIO *b)
263 # if defined(SO_RCVTIMEO)
264 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
272 /* Is a timer active? */
273 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
274 struct timeval timenow, timeleft;
276 /* Read current socket timeout */
277 # ifdef OPENSSL_SYS_WINDOWS
280 sz.i = sizeof(timeout);
281 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
282 (void *)&timeout, &sz.i) < 0) {
283 perror("getsockopt");
285 data->socket_timeout.tv_sec = timeout / 1000;
286 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
289 sz.i = sizeof(data->socket_timeout);
290 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
291 &(data->socket_timeout), (void *)&sz) < 0) {
292 perror("getsockopt");
293 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0)
294 OPENSSL_assert(sz.s <= sizeof(data->socket_timeout));
297 /* Get current time */
298 get_current_time(&timenow);
300 /* Calculate time left until timer expires */
301 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
302 if (timeleft.tv_usec < timenow.tv_usec) {
303 timeleft.tv_usec = 1000000 - timenow.tv_usec + timeleft.tv_usec;
306 timeleft.tv_usec -= timenow.tv_usec;
308 if (timeleft.tv_sec < timenow.tv_sec) {
310 timeleft.tv_usec = 1;
312 timeleft.tv_sec -= timenow.tv_sec;
316 * Adjust socket timeout if next handhake message timer will expire
319 if ((data->socket_timeout.tv_sec == 0
320 && data->socket_timeout.tv_usec == 0)
321 || (data->socket_timeout.tv_sec > timeleft.tv_sec)
322 || (data->socket_timeout.tv_sec == timeleft.tv_sec
323 && data->socket_timeout.tv_usec >= timeleft.tv_usec)) {
324 # ifdef OPENSSL_SYS_WINDOWS
325 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
326 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
327 (void *)&timeout, sizeof(timeout)) < 0) {
328 perror("setsockopt");
331 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
332 sizeof(struct timeval)) < 0) {
333 perror("setsockopt");
341 static void dgram_reset_rcv_timeout(BIO *b)
343 # if defined(SO_RCVTIMEO)
344 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
346 /* Is a timer active? */
347 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
348 # ifdef OPENSSL_SYS_WINDOWS
349 int timeout = data->socket_timeout.tv_sec * 1000 +
350 data->socket_timeout.tv_usec / 1000;
351 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
352 (void *)&timeout, sizeof(timeout)) < 0) {
353 perror("setsockopt");
357 (b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
358 sizeof(struct timeval)) < 0) {
359 perror("setsockopt");
366 static int dgram_read(BIO *b, char *out, int outl)
369 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
373 * See commentary in b_sock.c. <appro>
381 struct sockaddr_in sa_in;
382 # if OPENSSL_USE_IPV6
383 struct sockaddr_in6 sa_in6;
389 sa.len.i = sizeof(sa.peer);
392 clear_socket_error();
393 memset(&sa.peer, 0x00, sizeof(sa.peer));
394 dgram_adjust_rcv_timeout(b);
395 ret = recvfrom(b->num, out, outl, 0, &sa.peer.sa, (void *)&sa.len);
396 if (sizeof(sa.len.i) != sizeof(sa.len.s) && sa.len.i == 0) {
397 OPENSSL_assert(sa.len.s <= sizeof(sa.peer));
398 sa.len.i = (int)sa.len.s;
401 if (!data->connected && ret >= 0)
402 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
404 BIO_clear_retry_flags(b);
406 if (BIO_dgram_should_retry(ret)) {
407 BIO_set_retry_read(b);
408 data->_errno = get_last_socket_error();
412 dgram_reset_rcv_timeout(b);
417 static int dgram_write(BIO *b, const char *in, int inl)
420 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
421 clear_socket_error();
424 ret = writesocket(b->num, in, inl);
426 int peerlen = sizeof(data->peer);
428 if (data->peer.sa.sa_family == AF_INET)
429 peerlen = sizeof(data->peer.sa_in);
430 # if OPENSSL_USE_IPV6
431 else if (data->peer.sa.sa_family == AF_INET6)
432 peerlen = sizeof(data->peer.sa_in6);
434 # if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
435 ret = sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
437 ret = sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
441 BIO_clear_retry_flags(b);
443 if (BIO_dgram_should_retry(ret)) {
444 BIO_set_retry_write(b);
445 data->_errno = get_last_socket_error();
447 # if 0 /* higher layers are responsible for querying
448 * MTU, if necessary */
449 if (data->_errno == EMSGSIZE)
450 /* retrieve the new MTU */
451 BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
458 static long dgram_get_mtu_overhead(bio_dgram_data *data)
462 switch (data->peer.sa.sa_family) {
465 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
469 # if OPENSSL_USE_IPV6
471 # ifdef IN6_IS_ADDR_V4MAPPED
472 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
474 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
480 * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
486 /* We don't know. Go with the historical default */
493 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
497 struct sockaddr *to = NULL;
498 bio_dgram_data *data = NULL;
499 # if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
501 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
502 * modern enough to define socklen_t */
506 struct sockaddr_in s4;
507 # if OPENSSL_USE_IPV6
508 struct sockaddr_in6 s6;
513 data = (bio_dgram_data *)b->ptr;
518 case BIO_C_FILE_SEEK:
521 case BIO_C_FILE_TELL:
527 b->num = *((int *)ptr);
528 b->shutdown = (int)num;
540 case BIO_CTRL_GET_CLOSE:
543 case BIO_CTRL_SET_CLOSE:
544 b->shutdown = (int)num;
546 case BIO_CTRL_PENDING:
547 case BIO_CTRL_WPENDING:
554 case BIO_CTRL_DGRAM_CONNECT:
555 to = (struct sockaddr *)ptr;
557 if (connect(b->num, to, sizeof(struct sockaddr)) < 0) {
562 switch (to->sa_family) {
564 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
566 # if OPENSSL_USE_IPV6
568 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
572 memcpy(&data->peer, to, sizeof(data->peer.sa));
579 /* (Linux)kernel sets DF bit on outgoing IP packets */
580 case BIO_CTRL_DGRAM_MTU_DISCOVER:
581 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
582 addr_len = (socklen_t) sizeof(addr);
583 memset((void *)&addr, 0, sizeof(addr));
584 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
588 switch (addr.sa.sa_family) {
590 sockopt_val = IP_PMTUDISC_DO;
591 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
592 &sockopt_val, sizeof(sockopt_val))) < 0)
593 perror("setsockopt");
595 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
597 sockopt_val = IPV6_PMTUDISC_DO;
598 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
599 &sockopt_val, sizeof(sockopt_val))) < 0)
600 perror("setsockopt");
611 case BIO_CTRL_DGRAM_QUERY_MTU:
612 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
613 addr_len = (socklen_t) sizeof(addr);
614 memset((void *)&addr, 0, sizeof(addr));
615 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
619 sockopt_len = sizeof(sockopt_val);
620 switch (addr.sa.sa_family) {
623 getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
624 &sockopt_len)) < 0 || sockopt_val < 0) {
628 * we assume that the transport protocol is UDP and no IP
631 data->mtu = sockopt_val - 8 - 20;
635 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
638 getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
639 (void *)&sockopt_val, &sockopt_len)) < 0
640 || sockopt_val < 0) {
644 * we assume that the transport protocol is UDP and no IPV6
647 data->mtu = sockopt_val - 8 - 40;
660 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
661 ret = -dgram_get_mtu_overhead(data);
662 switch (data->peer.sa.sa_family) {
666 # if OPENSSL_USE_IPV6
668 # ifdef IN6_IS_ADDR_V4MAPPED
669 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
681 case BIO_CTRL_DGRAM_GET_MTU:
684 case BIO_CTRL_DGRAM_SET_MTU:
688 case BIO_CTRL_DGRAM_SET_CONNECTED:
689 to = (struct sockaddr *)ptr;
693 switch (to->sa_family) {
695 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
697 # if OPENSSL_USE_IPV6
699 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
703 memcpy(&data->peer, to, sizeof(data->peer.sa));
708 memset(&(data->peer), 0x00, sizeof(data->peer));
711 case BIO_CTRL_DGRAM_GET_PEER:
712 switch (data->peer.sa.sa_family) {
714 ret = sizeof(data->peer.sa_in);
716 # if OPENSSL_USE_IPV6
718 ret = sizeof(data->peer.sa_in6);
722 ret = sizeof(data->peer.sa);
725 if (num == 0 || num > ret)
727 memcpy(ptr, &data->peer, (ret = num));
729 case BIO_CTRL_DGRAM_SET_PEER:
730 to = (struct sockaddr *)ptr;
731 switch (to->sa_family) {
733 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
735 # if OPENSSL_USE_IPV6
737 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
741 memcpy(&data->peer, to, sizeof(data->peer.sa));
745 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
746 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
748 # if defined(SO_RCVTIMEO)
749 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
750 # ifdef OPENSSL_SYS_WINDOWS
752 struct timeval *tv = (struct timeval *)ptr;
753 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
754 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
755 (void *)&timeout, sizeof(timeout)) < 0) {
756 perror("setsockopt");
761 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
762 sizeof(struct timeval)) < 0) {
763 perror("setsockopt");
768 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
776 # ifdef OPENSSL_SYS_WINDOWS
778 struct timeval *tv = (struct timeval *)ptr;
780 sz.i = sizeof(timeout);
781 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
782 (void *)&timeout, &sz.i) < 0) {
783 perror("getsockopt");
786 tv->tv_sec = timeout / 1000;
787 tv->tv_usec = (timeout % 1000) * 1000;
791 sz.i = sizeof(struct timeval);
792 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
793 ptr, (void *)&sz) < 0) {
794 perror("getsockopt");
796 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
797 OPENSSL_assert(sz.s <= sizeof(struct timeval));
805 # if defined(SO_SNDTIMEO)
806 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
807 # ifdef OPENSSL_SYS_WINDOWS
809 struct timeval *tv = (struct timeval *)ptr;
810 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
811 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
812 (void *)&timeout, sizeof(timeout)) < 0) {
813 perror("setsockopt");
818 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
819 sizeof(struct timeval)) < 0) {
820 perror("setsockopt");
825 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
833 # ifdef OPENSSL_SYS_WINDOWS
835 struct timeval *tv = (struct timeval *)ptr;
837 sz.i = sizeof(timeout);
838 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
839 (void *)&timeout, &sz.i) < 0) {
840 perror("getsockopt");
843 tv->tv_sec = timeout / 1000;
844 tv->tv_usec = (timeout % 1000) * 1000;
848 sz.i = sizeof(struct timeval);
849 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
850 ptr, (void *)&sz) < 0) {
851 perror("getsockopt");
853 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
854 OPENSSL_assert(sz.s <= sizeof(struct timeval));
862 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
864 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
865 # ifdef OPENSSL_SYS_WINDOWS
866 if (data->_errno == WSAETIMEDOUT)
868 if (data->_errno == EAGAIN)
877 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
878 if (data->_errno == EMSGSIZE) {
885 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
886 ret = dgram_get_mtu_overhead(data);
895 static int dgram_puts(BIO *bp, const char *str)
900 ret = dgram_write(bp, str, n);
904 # ifndef OPENSSL_NO_SCTP
905 BIO_METHOD *BIO_s_datagram_sctp(void)
907 return (&methods_dgramp_sctp);
910 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
913 int ret, optval = 20000;
914 int auth_data = 0, auth_forward = 0;
916 struct sctp_authchunk auth;
917 struct sctp_authchunks *authchunks;
918 socklen_t sockopt_len;
919 # ifdef SCTP_AUTHENTICATION_EVENT
921 struct sctp_event event;
923 struct sctp_event_subscribe event;
927 bio = BIO_new(BIO_s_datagram_sctp());
930 BIO_set_fd(bio, fd, close_flag);
932 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
933 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
935 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
936 sizeof(struct sctp_authchunk));
941 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
943 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
944 sizeof(struct sctp_authchunk));
951 * Test if activation was successful. When using accept(), SCTP-AUTH has
952 * to be activated for the listening socket already, otherwise the
953 * connected socket won't use it.
955 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
956 authchunks = OPENSSL_malloc(sockopt_len);
961 memset(authchunks, 0, sizeof(sockopt_len));
963 getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
967 OPENSSL_free(authchunks);
972 for (p = (unsigned char *)authchunks->gauth_chunks;
973 p < (unsigned char *)authchunks + sockopt_len;
974 p += sizeof(uint8_t)) {
975 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
977 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
981 OPENSSL_free(authchunks);
983 OPENSSL_assert(auth_data);
984 OPENSSL_assert(auth_forward);
986 # ifdef SCTP_AUTHENTICATION_EVENT
988 memset(&event, 0, sizeof(struct sctp_event));
989 event.se_assoc_id = 0;
990 event.se_type = SCTP_AUTHENTICATION_EVENT;
993 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
994 sizeof(struct sctp_event));
1000 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
1001 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
1007 event.sctp_authentication_event = 1;
1010 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
1011 sizeof(struct sctp_event_subscribe));
1020 * Disable partial delivery by setting the min size larger than the max
1021 * record size of 2^14 + 2048 + 13
1024 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
1034 int BIO_dgram_is_sctp(BIO *bio)
1036 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
1039 static int dgram_sctp_new(BIO *bi)
1041 bio_dgram_sctp_data *data = NULL;
1045 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
1048 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
1049 # ifdef SCTP_PR_SCTP_NONE
1050 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1058 static int dgram_sctp_free(BIO *a)
1060 bio_dgram_sctp_data *data;
1064 if (!dgram_clear(a))
1067 data = (bio_dgram_sctp_data *) a->ptr;
1069 if (data->saved_message.data != NULL)
1070 OPENSSL_free(data->saved_message.data);
1077 # ifdef SCTP_AUTHENTICATION_EVENT
1078 void dgram_sctp_handle_auth_free_key_event(BIO *b,
1079 union sctp_notification *snp)
1082 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
1084 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
1085 struct sctp_authkeyid authkeyid;
1088 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1089 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1090 &authkeyid, sizeof(struct sctp_authkeyid));
1095 static int dgram_sctp_read(BIO *b, char *out, int outl)
1097 int ret = 0, n = 0, i, optval;
1099 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1100 union sctp_notification *snp;
1103 struct cmsghdr *cmsg;
1107 clear_socket_error();
1110 memset(&data->rcvinfo, 0x00,
1111 sizeof(struct bio_dgram_sctp_rcvinfo));
1114 msg.msg_name = NULL;
1115 msg.msg_namelen = 0;
1118 msg.msg_control = cmsgbuf;
1119 msg.msg_controllen = 512;
1121 n = recvmsg(b->num, &msg, 0);
1129 if (msg.msg_controllen > 0) {
1130 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1131 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1132 if (cmsg->cmsg_level != IPPROTO_SCTP)
1134 # ifdef SCTP_RCVINFO
1135 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1136 struct sctp_rcvinfo *rcvinfo;
1138 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1139 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1140 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1141 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1142 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1143 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1144 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1145 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1149 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1150 struct sctp_sndrcvinfo *sndrcvinfo;
1153 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1154 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1155 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1156 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1157 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1158 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1159 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1160 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1166 if (msg.msg_flags & MSG_NOTIFICATION) {
1167 snp = (union sctp_notification *)out;
1168 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1170 struct sctp_event event;
1172 struct sctp_event_subscribe event;
1173 socklen_t eventsize;
1176 * If a message has been delayed until the socket is dry,
1177 * it can be sent now.
1179 if (data->saved_message.length > 0) {
1180 dgram_sctp_write(data->saved_message.bio,
1181 data->saved_message.data,
1182 data->saved_message.length);
1183 OPENSSL_free(data->saved_message.data);
1184 data->saved_message.data = NULL;
1185 data->saved_message.length = 0;
1188 /* disable sender dry event */
1190 memset(&event, 0, sizeof(struct sctp_event));
1191 event.se_assoc_id = 0;
1192 event.se_type = SCTP_SENDER_DRY_EVENT;
1194 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1195 sizeof(struct sctp_event));
1201 eventsize = sizeof(struct sctp_event_subscribe);
1202 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1209 event.sctp_sender_dry_event = 0;
1211 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1212 sizeof(struct sctp_event_subscribe));
1219 # ifdef SCTP_AUTHENTICATION_EVENT
1220 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1221 dgram_sctp_handle_auth_free_key_event(b, snp);
1224 if (data->handle_notifications != NULL)
1225 data->handle_notifications(b, data->notification_context,
1228 memset(out, 0, outl);
1232 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1235 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1236 /* Partial message read, this should never happen! */
1239 * The buffer was too small, this means the peer sent a message
1240 * that was larger than allowed.
1246 * Test if socket buffer can handle max record size (2^14 + 2048
1249 optlen = (socklen_t) sizeof(int);
1250 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1252 OPENSSL_assert(optval >= 18445);
1255 * Test if SCTP doesn't partially deliver below max record size
1256 * (2^14 + 2048 + 13)
1258 optlen = (socklen_t) sizeof(int);
1260 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1263 OPENSSL_assert(optval >= 18445);
1266 * Partially delivered notification??? Probably a bug....
1268 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1271 * Everything seems ok till now, so it's most likely a message
1272 * dropped by PR-SCTP.
1274 memset(out, 0, outl);
1275 BIO_set_retry_read(b);
1279 BIO_clear_retry_flags(b);
1281 if (BIO_dgram_should_retry(ret)) {
1282 BIO_set_retry_read(b);
1283 data->_errno = get_last_socket_error();
1287 /* Test if peer uses SCTP-AUTH before continuing */
1288 if (!data->peer_auth_tested) {
1289 int ii, auth_data = 0, auth_forward = 0;
1291 struct sctp_authchunks *authchunks;
1294 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1295 authchunks = OPENSSL_malloc(optlen);
1297 BIOerr(BIO_F_DGRAM_SCTP_READ, ERR_R_MALLOC_FAILURE);
1300 memset(authchunks, 0, sizeof(optlen));
1301 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1302 authchunks, &optlen);
1305 for (p = (unsigned char *)authchunks->gauth_chunks;
1306 p < (unsigned char *)authchunks + optlen;
1307 p += sizeof(uint8_t)) {
1308 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1310 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1314 OPENSSL_free(authchunks);
1316 if (!auth_data || !auth_forward) {
1317 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1321 data->peer_auth_tested = 1;
1327 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1330 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1331 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1332 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1333 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1334 struct iovec iov[1];
1336 struct cmsghdr *cmsg;
1337 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1338 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1339 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1340 struct sctp_sndinfo *sndinfo;
1341 struct sctp_prinfo *prinfo;
1343 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1344 struct sctp_sndrcvinfo *sndrcvinfo;
1347 clear_socket_error();
1350 * If we're send anything else than application data, disable all user
1351 * parameters and flags.
1354 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1355 # ifdef SCTP_SACK_IMMEDIATELY
1356 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1358 sinfo = &handshake_sinfo;
1362 * If we have to send a shutdown alert message and the socket is not dry
1363 * yet, we have to save it and send it as soon as the socket gets dry.
1365 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b)) {
1367 data->saved_message.bio = b;
1368 if (!(tmp = OPENSSL_malloc(inl))) {
1369 BIOerr(BIO_F_DGRAM_SCTP_WRITE, ERR_R_MALLOC_FAILURE);
1372 if (data->saved_message.data)
1373 OPENSSL_free(data->saved_message.data);
1374 data->saved_message.data = tmp;
1375 memcpy(data->saved_message.data, in, inl);
1376 data->saved_message.length = inl;
1380 iov[0].iov_base = (char *)in;
1381 iov[0].iov_len = inl;
1382 msg.msg_name = NULL;
1383 msg.msg_namelen = 0;
1386 msg.msg_control = (caddr_t) cmsgbuf;
1387 msg.msg_controllen = 0;
1389 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1390 cmsg = (struct cmsghdr *)cmsgbuf;
1391 cmsg->cmsg_level = IPPROTO_SCTP;
1392 cmsg->cmsg_type = SCTP_SNDINFO;
1393 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1394 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1395 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1396 sndinfo->snd_sid = sinfo->snd_sid;
1397 sndinfo->snd_flags = sinfo->snd_flags;
1398 sndinfo->snd_ppid = sinfo->snd_ppid;
1399 sndinfo->snd_context = sinfo->snd_context;
1400 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1403 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1404 cmsg->cmsg_level = IPPROTO_SCTP;
1405 cmsg->cmsg_type = SCTP_PRINFO;
1406 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1407 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1408 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1409 prinfo->pr_policy = pinfo->pr_policy;
1410 prinfo->pr_value = pinfo->pr_value;
1411 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1413 cmsg = (struct cmsghdr *)cmsgbuf;
1414 cmsg->cmsg_level = IPPROTO_SCTP;
1415 cmsg->cmsg_type = SCTP_SNDRCV;
1416 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1417 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1418 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1419 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1420 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1422 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1424 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1425 sndrcvinfo->sinfo_context = sinfo->snd_context;
1426 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1427 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1430 ret = sendmsg(b->num, &msg, 0);
1432 BIO_clear_retry_flags(b);
1434 if (BIO_dgram_should_retry(ret)) {
1435 BIO_set_retry_write(b);
1436 data->_errno = get_last_socket_error();
1442 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1445 bio_dgram_sctp_data *data = NULL;
1446 socklen_t sockopt_len = 0;
1447 struct sctp_authkeyid authkeyid;
1448 struct sctp_authkey *authkey = NULL;
1450 data = (bio_dgram_sctp_data *) b->ptr;
1453 case BIO_CTRL_DGRAM_QUERY_MTU:
1455 * Set to maximum (2^14) and ignore user input to enable transport
1456 * protocol fragmentation. Returns always 2^14.
1461 case BIO_CTRL_DGRAM_SET_MTU:
1463 * Set to maximum (2^14) and ignore input to enable transport
1464 * protocol fragmentation. Returns always 2^14.
1469 case BIO_CTRL_DGRAM_SET_CONNECTED:
1470 case BIO_CTRL_DGRAM_CONNECT:
1471 /* Returns always -1. */
1474 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1476 * SCTP doesn't need the DTLS timer Returns always 1.
1479 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1481 * We allow transport protocol fragmentation so this is irrelevant
1485 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1487 data->in_handshake = 1;
1489 data->in_handshake = 0;
1492 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1493 &data->in_handshake, sizeof(int));
1495 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1497 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1500 /* Get active key */
1501 sockopt_len = sizeof(struct sctp_authkeyid);
1503 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1509 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1510 authkey = OPENSSL_malloc(sockopt_len);
1511 if (authkey == NULL) {
1515 memset(authkey, 0x00, sockopt_len);
1516 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1517 # ifndef __FreeBSD__
1519 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1520 * and higher work without it.
1522 authkey->sca_keylength = 64;
1524 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1527 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1529 OPENSSL_free(authkey);
1534 /* Reset active key */
1535 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1536 &authkeyid, sizeof(struct sctp_authkeyid));
1541 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1542 /* Returns 0 on success, -1 otherwise. */
1544 /* Get active key */
1545 sockopt_len = sizeof(struct sctp_authkeyid);
1547 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1552 /* Set active key */
1553 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1554 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1555 &authkeyid, sizeof(struct sctp_authkeyid));
1560 * CCS has been sent, so remember that and fall through to check if
1561 * we need to deactivate an old key
1565 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1566 /* Returns 0 on success, -1 otherwise. */
1569 * Has this command really been called or is this just a
1572 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1576 * CSS has been both, received and sent, so deactivate an old key
1578 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1579 /* Get active key */
1580 sockopt_len = sizeof(struct sctp_authkeyid);
1582 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1583 &authkeyid, &sockopt_len);
1588 * Deactivate key or delete second last key if
1589 * SCTP_AUTHENTICATION_EVENT is not available.
1591 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1592 # ifdef SCTP_AUTH_DEACTIVATE_KEY
1593 sockopt_len = sizeof(struct sctp_authkeyid);
1594 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1595 &authkeyid, sockopt_len);
1599 # ifndef SCTP_AUTHENTICATION_EVENT
1600 if (authkeyid.scact_keynumber > 0) {
1601 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1602 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1603 &authkeyid, sizeof(struct sctp_authkeyid));
1613 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1614 /* Returns the size of the copied struct. */
1615 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1616 num = sizeof(struct bio_dgram_sctp_sndinfo);
1618 memcpy(ptr, &(data->sndinfo), num);
1621 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1622 /* Returns the size of the copied struct. */
1623 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1624 num = sizeof(struct bio_dgram_sctp_sndinfo);
1626 memcpy(&(data->sndinfo), ptr, num);
1628 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1629 /* Returns the size of the copied struct. */
1630 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1631 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1633 memcpy(ptr, &data->rcvinfo, num);
1637 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1638 /* Returns the size of the copied struct. */
1639 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1640 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1642 memcpy(&(data->rcvinfo), ptr, num);
1644 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1645 /* Returns the size of the copied struct. */
1646 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1647 num = sizeof(struct bio_dgram_sctp_prinfo);
1649 memcpy(ptr, &(data->prinfo), num);
1652 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1653 /* Returns the size of the copied struct. */
1654 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1655 num = sizeof(struct bio_dgram_sctp_prinfo);
1657 memcpy(&(data->prinfo), ptr, num);
1659 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1660 /* Returns always 1. */
1662 data->save_shutdown = 1;
1664 data->save_shutdown = 0;
1669 * Pass to default ctrl function to process SCTP unspecific commands
1671 ret = dgram_ctrl(b, cmd, num, ptr);
1677 int BIO_dgram_sctp_notification_cb(BIO *b,
1678 void (*handle_notifications) (BIO *bio,
1684 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1686 if (handle_notifications != NULL) {
1687 data->handle_notifications = handle_notifications;
1688 data->notification_context = context;
1695 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1698 int n, sockflags, ret;
1699 union sctp_notification snp;
1703 struct sctp_event event;
1705 struct sctp_event_subscribe event;
1706 socklen_t eventsize;
1708 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1710 /* set sender dry event */
1712 memset(&event, 0, sizeof(struct sctp_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 = sizeof(struct sctp_event_subscribe);
1721 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1725 event.sctp_sender_dry_event = 1;
1728 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1729 sizeof(struct sctp_event_subscribe));
1734 /* peek for notification */
1735 memset(&snp, 0x00, sizeof(union sctp_notification));
1736 iov.iov_base = (char *)&snp;
1737 iov.iov_len = sizeof(union sctp_notification);
1738 msg.msg_name = NULL;
1739 msg.msg_namelen = 0;
1742 msg.msg_control = NULL;
1743 msg.msg_controllen = 0;
1746 n = recvmsg(b->num, &msg, MSG_PEEK);
1748 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1749 && (get_last_socket_error() != EWOULDBLOCK))
1755 /* if we find a notification, process it and try again if necessary */
1756 while (msg.msg_flags & MSG_NOTIFICATION) {
1757 memset(&snp, 0x00, sizeof(union sctp_notification));
1758 iov.iov_base = (char *)&snp;
1759 iov.iov_len = sizeof(union sctp_notification);
1760 msg.msg_name = NULL;
1761 msg.msg_namelen = 0;
1764 msg.msg_control = NULL;
1765 msg.msg_controllen = 0;
1768 n = recvmsg(b->num, &msg, 0);
1770 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1771 && (get_last_socket_error() != EWOULDBLOCK))
1777 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1780 /* disable sender dry event */
1782 memset(&event, 0, sizeof(struct sctp_event));
1783 event.se_assoc_id = 0;
1784 event.se_type = SCTP_SENDER_DRY_EVENT;
1787 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1788 sizeof(struct sctp_event));
1790 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1792 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1797 event.sctp_sender_dry_event = 0;
1800 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1801 sizeof(struct sctp_event_subscribe));
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 if (data->handle_notifications != NULL)
1812 data->handle_notifications(b, data->notification_context,
1815 /* found notification, peek again */
1816 memset(&snp, 0x00, sizeof(union sctp_notification));
1817 iov.iov_base = (char *)&snp;
1818 iov.iov_len = sizeof(union sctp_notification);
1819 msg.msg_name = NULL;
1820 msg.msg_namelen = 0;
1823 msg.msg_control = NULL;
1824 msg.msg_controllen = 0;
1827 /* if we have seen the dry already, don't wait */
1829 sockflags = fcntl(b->num, F_GETFL, 0);
1830 fcntl(b->num, F_SETFL, O_NONBLOCK);
1833 n = recvmsg(b->num, &msg, MSG_PEEK);
1836 fcntl(b->num, F_SETFL, sockflags);
1840 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1841 && (get_last_socket_error() != EWOULDBLOCK))
1848 /* read anything else */
1852 int BIO_dgram_sctp_msg_waiting(BIO *b)
1855 union sctp_notification snp;
1858 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1860 /* Check if there are any messages waiting to be read */
1862 memset(&snp, 0x00, sizeof(union sctp_notification));
1863 iov.iov_base = (char *)&snp;
1864 iov.iov_len = sizeof(union sctp_notification);
1865 msg.msg_name = NULL;
1866 msg.msg_namelen = 0;
1869 msg.msg_control = NULL;
1870 msg.msg_controllen = 0;
1873 sockflags = fcntl(b->num, F_GETFL, 0);
1874 fcntl(b->num, F_SETFL, O_NONBLOCK);
1875 n = recvmsg(b->num, &msg, MSG_PEEK);
1876 fcntl(b->num, F_SETFL, sockflags);
1878 /* if notification, process and try again */
1879 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1880 # ifdef SCTP_AUTHENTICATION_EVENT
1881 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1882 dgram_sctp_handle_auth_free_key_event(b, &snp);
1885 memset(&snp, 0x00, sizeof(union sctp_notification));
1886 iov.iov_base = (char *)&snp;
1887 iov.iov_len = sizeof(union sctp_notification);
1888 msg.msg_name = NULL;
1889 msg.msg_namelen = 0;
1892 msg.msg_control = NULL;
1893 msg.msg_controllen = 0;
1895 n = recvmsg(b->num, &msg, 0);
1897 if (data->handle_notifications != NULL)
1898 data->handle_notifications(b, data->notification_context,
1902 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1904 /* Return 1 if there is a message to be read, return 0 otherwise. */
1911 static int dgram_sctp_puts(BIO *bp, const char *str)
1916 ret = dgram_sctp_write(bp, str, n);
1921 static int BIO_dgram_should_retry(int i)
1925 if ((i == 0) || (i == -1)) {
1926 err = get_last_socket_error();
1928 # if defined(OPENSSL_SYS_WINDOWS)
1930 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1931 * this point, the error code was overwritten by another system call
1932 * before this error handling is called.
1936 return (BIO_dgram_non_fatal_error(err));
1941 int BIO_dgram_non_fatal_error(int err)
1944 # if defined(OPENSSL_SYS_WINDOWS)
1945 # if defined(WSAEWOULDBLOCK)
1946 case WSAEWOULDBLOCK:
1949 # if 0 /* This appears to always be an error */
1950 # if defined(WSAENOTCONN)
1957 # ifdef WSAEWOULDBLOCK
1958 # if WSAEWOULDBLOCK != EWOULDBLOCK
1971 # if EWOULDBLOCK != EAGAIN
1996 static void get_current_time(struct timeval *t)
1998 # ifdef OPENSSL_SYS_WIN32
2001 t->tv_sec = (long)tb.time;
2002 t->tv_usec = (long)tb.millitm * 1000;
2003 # elif defined(OPENSSL_SYS_VMS)
2006 t->tv_sec = (long)tb.time;
2007 t->tv_usec = (long)tb.millitm * 1000;
2009 gettimeofday(t, NULL);