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_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 OPENSSL_USE_IPV6 && !defined(IPPROTO_IPV6)
84 # define IPPROTO_IPV6 41 /* windows is lame */
87 # if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
88 /* Standard definition causes type-punning problems. */
89 # undef IN6_IS_ADDR_V4MAPPED
90 # define s6_addr32 __u6_addr.__u6_addr32
91 # define IN6_IS_ADDR_V4MAPPED(a) \
92 (((a)->s6_addr32[0] == 0) && \
93 ((a)->s6_addr32[1] == 0) && \
94 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
98 # define sock_write SockWrite /* Watt-32 uses same names */
99 # define sock_read SockRead
100 # define sock_puts SockPuts
103 static int dgram_write(BIO *h, const char *buf, int num);
104 static int dgram_read(BIO *h, char *buf, int size);
105 static int dgram_puts(BIO *h, const char *str);
106 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
107 static int dgram_new(BIO *h);
108 static int dgram_free(BIO *data);
109 static int dgram_clear(BIO *bio);
111 # ifndef OPENSSL_NO_SCTP
112 static int dgram_sctp_write(BIO *h, const char *buf, int num);
113 static int dgram_sctp_read(BIO *h, char *buf, int size);
114 static int dgram_sctp_puts(BIO *h, const char *str);
115 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
116 static int dgram_sctp_new(BIO *h);
117 static int dgram_sctp_free(BIO *data);
118 # ifdef SCTP_AUTHENTICATION_EVENT
119 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification
124 static int BIO_dgram_should_retry(int s);
126 static void get_current_time(struct timeval *t);
128 static BIO_METHOD methods_dgramp = {
134 NULL, /* dgram_gets, */
141 # ifndef OPENSSL_NO_SCTP
142 static BIO_METHOD methods_dgramp_sctp = {
144 "datagram sctp socket",
148 NULL, /* dgram_gets, */
156 typedef struct bio_dgram_data_st {
159 struct sockaddr_in sa_in;
160 # if OPENSSL_USE_IPV6
161 struct sockaddr_in6 sa_in6;
164 unsigned int connected;
167 struct timeval next_timeout;
168 struct timeval socket_timeout;
171 # ifndef OPENSSL_NO_SCTP
172 typedef struct bio_dgram_sctp_save_message_st {
176 } bio_dgram_sctp_save_message;
178 typedef struct bio_dgram_sctp_data_st {
181 struct sockaddr_in sa_in;
182 # if OPENSSL_USE_IPV6
183 struct sockaddr_in6 sa_in6;
186 unsigned int connected;
189 struct bio_dgram_sctp_sndinfo sndinfo;
190 struct bio_dgram_sctp_rcvinfo rcvinfo;
191 struct bio_dgram_sctp_prinfo prinfo;
192 void (*handle_notifications) (BIO *bio, void *context, void *buf);
193 void *notification_context;
198 int peer_auth_tested;
199 bio_dgram_sctp_save_message saved_message;
200 } bio_dgram_sctp_data;
203 BIO_METHOD *BIO_s_datagram(void)
205 return (&methods_dgramp);
208 BIO *BIO_new_dgram(int fd, int close_flag)
212 ret = BIO_new(BIO_s_datagram());
215 BIO_set_fd(ret, fd, close_flag);
219 static int dgram_new(BIO *bi)
221 bio_dgram_data *data = NULL;
225 data = OPENSSL_malloc(sizeof(bio_dgram_data));
228 memset(data, 0x00, sizeof(bio_dgram_data));
235 static int dgram_free(BIO *a)
237 bio_dgram_data *data;
244 data = (bio_dgram_data *)a->ptr;
251 static int dgram_clear(BIO *a)
265 static void dgram_adjust_rcv_timeout(BIO *b)
267 # if defined(SO_RCVTIMEO)
268 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
276 /* Is a timer active? */
277 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
278 struct timeval timenow, timeleft;
280 /* Read current socket timeout */
281 # ifdef OPENSSL_SYS_WINDOWS
284 sz.i = sizeof(timeout);
285 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
286 (void *)&timeout, &sz.i) < 0) {
287 perror("getsockopt");
289 data->socket_timeout.tv_sec = timeout / 1000;
290 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
293 sz.i = sizeof(data->socket_timeout);
294 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
295 &(data->socket_timeout), (void *)&sz) < 0) {
296 perror("getsockopt");
297 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0)
298 OPENSSL_assert(sz.s <= sizeof(data->socket_timeout));
301 /* Get current time */
302 get_current_time(&timenow);
304 /* Calculate time left until timer expires */
305 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
306 timeleft.tv_sec -= timenow.tv_sec;
307 timeleft.tv_usec -= timenow.tv_usec;
308 if (timeleft.tv_usec < 0) {
310 timeleft.tv_usec += 1000000;
313 if (timeleft.tv_sec < 0) {
315 timeleft.tv_usec = 1;
319 * Adjust socket timeout if next handhake message timer will expire
322 if ((data->socket_timeout.tv_sec == 0
323 && data->socket_timeout.tv_usec == 0)
324 || (data->socket_timeout.tv_sec > timeleft.tv_sec)
325 || (data->socket_timeout.tv_sec == timeleft.tv_sec
326 && data->socket_timeout.tv_usec >= timeleft.tv_usec)) {
327 # ifdef OPENSSL_SYS_WINDOWS
328 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
329 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
330 (void *)&timeout, sizeof(timeout)) < 0) {
331 perror("setsockopt");
334 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
335 sizeof(struct timeval)) < 0) {
336 perror("setsockopt");
344 static void dgram_reset_rcv_timeout(BIO *b)
346 # if defined(SO_RCVTIMEO)
347 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
349 /* Is a timer active? */
350 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
351 # ifdef OPENSSL_SYS_WINDOWS
352 int timeout = data->socket_timeout.tv_sec * 1000 +
353 data->socket_timeout.tv_usec / 1000;
354 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
355 (void *)&timeout, sizeof(timeout)) < 0) {
356 perror("setsockopt");
360 (b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
361 sizeof(struct timeval)) < 0) {
362 perror("setsockopt");
369 static int dgram_read(BIO *b, char *out, int outl)
372 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
376 * See commentary in b_sock.c. <appro>
384 struct sockaddr_in sa_in;
385 # if OPENSSL_USE_IPV6
386 struct sockaddr_in6 sa_in6;
392 sa.len.i = sizeof(sa.peer);
395 clear_socket_error();
396 memset(&sa.peer, 0x00, sizeof(sa.peer));
397 dgram_adjust_rcv_timeout(b);
398 ret = recvfrom(b->num, out, outl, 0, &sa.peer.sa, (void *)&sa.len);
399 if (sizeof(sa.len.i) != sizeof(sa.len.s) && sa.len.i == 0) {
400 OPENSSL_assert(sa.len.s <= sizeof(sa.peer));
401 sa.len.i = (int)sa.len.s;
404 if (!data->connected && ret >= 0)
405 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
407 BIO_clear_retry_flags(b);
409 if (BIO_dgram_should_retry(ret)) {
410 BIO_set_retry_read(b);
411 data->_errno = get_last_socket_error();
415 dgram_reset_rcv_timeout(b);
420 static int dgram_write(BIO *b, const char *in, int inl)
423 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
424 clear_socket_error();
427 ret = writesocket(b->num, in, inl);
429 int peerlen = sizeof(data->peer);
431 if (data->peer.sa.sa_family == AF_INET)
432 peerlen = sizeof(data->peer.sa_in);
433 # if OPENSSL_USE_IPV6
434 else if (data->peer.sa.sa_family == AF_INET6)
435 peerlen = sizeof(data->peer.sa_in6);
437 # if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
438 ret = sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
440 ret = sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
444 BIO_clear_retry_flags(b);
446 if (BIO_dgram_should_retry(ret)) {
447 BIO_set_retry_write(b);
448 data->_errno = get_last_socket_error();
450 # if 0 /* higher layers are responsible for querying
451 * MTU, if necessary */
452 if (data->_errno == EMSGSIZE)
453 /* retrieve the new MTU */
454 BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
461 static long dgram_get_mtu_overhead(bio_dgram_data *data)
465 switch (data->peer.sa.sa_family) {
468 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
472 # if OPENSSL_USE_IPV6
474 # ifdef IN6_IS_ADDR_V4MAPPED
475 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
477 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
483 * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
489 /* We don't know. Go with the historical default */
496 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
500 struct sockaddr *to = NULL;
501 bio_dgram_data *data = NULL;
503 # if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
504 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
505 * modern enough to define socklen_t */
509 struct sockaddr_in s4;
510 # if OPENSSL_USE_IPV6
511 struct sockaddr_in6 s6;
516 data = (bio_dgram_data *)b->ptr;
521 case BIO_C_FILE_SEEK:
524 case BIO_C_FILE_TELL:
530 b->num = *((int *)ptr);
531 b->shutdown = (int)num;
543 case BIO_CTRL_GET_CLOSE:
546 case BIO_CTRL_SET_CLOSE:
547 b->shutdown = (int)num;
549 case BIO_CTRL_PENDING:
550 case BIO_CTRL_WPENDING:
557 case BIO_CTRL_DGRAM_CONNECT:
558 to = (struct sockaddr *)ptr;
560 if (connect(b->num, to, sizeof(struct sockaddr)) < 0) {
565 switch (to->sa_family) {
567 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
569 # if OPENSSL_USE_IPV6
571 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
575 memcpy(&data->peer, to, sizeof(data->peer.sa));
582 /* (Linux)kernel sets DF bit on outgoing IP packets */
583 case BIO_CTRL_DGRAM_MTU_DISCOVER:
584 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
585 addr_len = (socklen_t) sizeof(addr);
586 memset((void *)&addr, 0, sizeof(addr));
587 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
591 switch (addr.sa.sa_family) {
593 sockopt_val = IP_PMTUDISC_DO;
594 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
595 &sockopt_val, sizeof(sockopt_val))) < 0)
596 perror("setsockopt");
598 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
600 sockopt_val = IPV6_PMTUDISC_DO;
601 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
602 &sockopt_val, sizeof(sockopt_val))) < 0)
603 perror("setsockopt");
614 case BIO_CTRL_DGRAM_QUERY_MTU:
615 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
616 addr_len = (socklen_t) sizeof(addr);
617 memset((void *)&addr, 0, sizeof(addr));
618 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
622 sockopt_len = sizeof(sockopt_val);
623 switch (addr.sa.sa_family) {
626 getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
627 &sockopt_len)) < 0 || sockopt_val < 0) {
631 * we assume that the transport protocol is UDP and no IP
634 data->mtu = sockopt_val - 8 - 20;
638 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
641 getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
642 (void *)&sockopt_val, &sockopt_len)) < 0
643 || sockopt_val < 0) {
647 * we assume that the transport protocol is UDP and no IPV6
650 data->mtu = sockopt_val - 8 - 40;
663 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
664 ret = -dgram_get_mtu_overhead(data);
665 switch (data->peer.sa.sa_family) {
669 # if OPENSSL_USE_IPV6
671 # ifdef IN6_IS_ADDR_V4MAPPED
672 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
684 case BIO_CTRL_DGRAM_GET_MTU:
687 case BIO_CTRL_DGRAM_SET_MTU:
691 case BIO_CTRL_DGRAM_SET_CONNECTED:
692 to = (struct sockaddr *)ptr;
696 switch (to->sa_family) {
698 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
700 # if OPENSSL_USE_IPV6
702 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
706 memcpy(&data->peer, to, sizeof(data->peer.sa));
711 memset(&(data->peer), 0x00, sizeof(data->peer));
714 case BIO_CTRL_DGRAM_GET_PEER:
715 switch (data->peer.sa.sa_family) {
717 ret = sizeof(data->peer.sa_in);
719 # if OPENSSL_USE_IPV6
721 ret = sizeof(data->peer.sa_in6);
725 ret = sizeof(data->peer.sa);
728 if (num == 0 || num > ret)
730 memcpy(ptr, &data->peer, (ret = num));
732 case BIO_CTRL_DGRAM_SET_PEER:
733 to = (struct sockaddr *)ptr;
734 switch (to->sa_family) {
736 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
738 # if OPENSSL_USE_IPV6
740 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
744 memcpy(&data->peer, to, sizeof(data->peer.sa));
748 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
749 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
751 # if defined(SO_RCVTIMEO)
752 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
753 # ifdef OPENSSL_SYS_WINDOWS
755 struct timeval *tv = (struct timeval *)ptr;
756 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
757 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
758 (void *)&timeout, sizeof(timeout)) < 0) {
759 perror("setsockopt");
764 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
765 sizeof(struct timeval)) < 0) {
766 perror("setsockopt");
771 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
779 # ifdef OPENSSL_SYS_WINDOWS
781 struct timeval *tv = (struct timeval *)ptr;
783 sz.i = sizeof(timeout);
784 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
785 (void *)&timeout, &sz.i) < 0) {
786 perror("getsockopt");
789 tv->tv_sec = timeout / 1000;
790 tv->tv_usec = (timeout % 1000) * 1000;
794 sz.i = sizeof(struct timeval);
795 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
796 ptr, (void *)&sz) < 0) {
797 perror("getsockopt");
799 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
800 OPENSSL_assert(sz.s <= sizeof(struct timeval));
808 # if defined(SO_SNDTIMEO)
809 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
810 # ifdef OPENSSL_SYS_WINDOWS
812 struct timeval *tv = (struct timeval *)ptr;
813 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
814 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
815 (void *)&timeout, sizeof(timeout)) < 0) {
816 perror("setsockopt");
821 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
822 sizeof(struct timeval)) < 0) {
823 perror("setsockopt");
828 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
836 # ifdef OPENSSL_SYS_WINDOWS
838 struct timeval *tv = (struct timeval *)ptr;
840 sz.i = sizeof(timeout);
841 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
842 (void *)&timeout, &sz.i) < 0) {
843 perror("getsockopt");
846 tv->tv_sec = timeout / 1000;
847 tv->tv_usec = (timeout % 1000) * 1000;
851 sz.i = sizeof(struct timeval);
852 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
853 ptr, (void *)&sz) < 0) {
854 perror("getsockopt");
856 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
857 OPENSSL_assert(sz.s <= sizeof(struct timeval));
865 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
867 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
868 # ifdef OPENSSL_SYS_WINDOWS
869 if (data->_errno == WSAETIMEDOUT)
871 if (data->_errno == EAGAIN)
880 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
881 if (data->_errno == EMSGSIZE) {
888 case BIO_CTRL_DGRAM_SET_DONT_FRAG:
889 sockopt_val = num ? 1 : 0;
891 switch (data->peer.sa.sa_family) {
893 # if defined(IP_DONTFRAG)
894 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG,
895 &sockopt_val, sizeof(sockopt_val))) < 0) {
896 perror("setsockopt");
899 # elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTUDISCOVER)
900 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
901 (ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
902 &sockopt_val, sizeof(sockopt_val))) < 0) {
903 perror("setsockopt");
906 # elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT)
907 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT,
908 (const char *)&sockopt_val,
909 sizeof(sockopt_val))) < 0) {
910 perror("setsockopt");
917 # if OPENSSL_USE_IPV6
919 # if defined(IPV6_DONTFRAG)
920 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
921 (const void *)&sockopt_val,
922 sizeof(sockopt_val))) < 0) {
923 perror("setsockopt");
926 # elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER)
927 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
928 (ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
929 &sockopt_val, sizeof(sockopt_val))) < 0) {
930 perror("setsockopt");
943 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
944 ret = dgram_get_mtu_overhead(data);
953 static int dgram_puts(BIO *bp, const char *str)
958 ret = dgram_write(bp, str, n);
962 # ifndef OPENSSL_NO_SCTP
963 BIO_METHOD *BIO_s_datagram_sctp(void)
965 return (&methods_dgramp_sctp);
968 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
971 int ret, optval = 20000;
972 int auth_data = 0, auth_forward = 0;
974 struct sctp_authchunk auth;
975 struct sctp_authchunks *authchunks;
976 socklen_t sockopt_len;
977 # ifdef SCTP_AUTHENTICATION_EVENT
979 struct sctp_event event;
981 struct sctp_event_subscribe event;
985 bio = BIO_new(BIO_s_datagram_sctp());
988 BIO_set_fd(bio, fd, close_flag);
990 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
991 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
993 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
994 sizeof(struct sctp_authchunk));
999 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
1001 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
1002 sizeof(struct sctp_authchunk));
1009 * Test if activation was successful. When using accept(), SCTP-AUTH has
1010 * to be activated for the listening socket already, otherwise the
1011 * connected socket won't use it.
1013 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1014 authchunks = OPENSSL_malloc(sockopt_len);
1019 memset(authchunks, 0, sizeof(sockopt_len));
1021 getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
1025 OPENSSL_free(authchunks);
1030 for (p = (unsigned char *)authchunks->gauth_chunks;
1031 p < (unsigned char *)authchunks + sockopt_len;
1032 p += sizeof(uint8_t)) {
1033 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1035 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1039 OPENSSL_free(authchunks);
1041 OPENSSL_assert(auth_data);
1042 OPENSSL_assert(auth_forward);
1044 # ifdef SCTP_AUTHENTICATION_EVENT
1046 memset(&event, 0, sizeof(struct sctp_event));
1047 event.se_assoc_id = 0;
1048 event.se_type = SCTP_AUTHENTICATION_EVENT;
1051 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
1052 sizeof(struct sctp_event));
1058 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
1059 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
1065 event.sctp_authentication_event = 1;
1068 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
1069 sizeof(struct sctp_event_subscribe));
1078 * Disable partial delivery by setting the min size larger than the max
1079 * record size of 2^14 + 2048 + 13
1082 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
1092 int BIO_dgram_is_sctp(BIO *bio)
1094 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
1097 static int dgram_sctp_new(BIO *bi)
1099 bio_dgram_sctp_data *data = NULL;
1103 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
1106 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
1107 # ifdef SCTP_PR_SCTP_NONE
1108 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1116 static int dgram_sctp_free(BIO *a)
1118 bio_dgram_sctp_data *data;
1122 if (!dgram_clear(a))
1125 data = (bio_dgram_sctp_data *) a->ptr;
1127 if (data->saved_message.data != NULL)
1128 OPENSSL_free(data->saved_message.data);
1135 # ifdef SCTP_AUTHENTICATION_EVENT
1136 void dgram_sctp_handle_auth_free_key_event(BIO *b,
1137 union sctp_notification *snp)
1140 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
1142 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
1143 struct sctp_authkeyid authkeyid;
1146 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1147 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1148 &authkeyid, sizeof(struct sctp_authkeyid));
1153 static int dgram_sctp_read(BIO *b, char *out, int outl)
1155 int ret = 0, n = 0, i, optval;
1157 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1158 union sctp_notification *snp;
1161 struct cmsghdr *cmsg;
1165 clear_socket_error();
1168 memset(&data->rcvinfo, 0x00,
1169 sizeof(struct bio_dgram_sctp_rcvinfo));
1172 msg.msg_name = NULL;
1173 msg.msg_namelen = 0;
1176 msg.msg_control = cmsgbuf;
1177 msg.msg_controllen = 512;
1179 n = recvmsg(b->num, &msg, 0);
1187 if (msg.msg_controllen > 0) {
1188 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1189 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1190 if (cmsg->cmsg_level != IPPROTO_SCTP)
1192 # ifdef SCTP_RCVINFO
1193 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1194 struct sctp_rcvinfo *rcvinfo;
1196 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1197 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1198 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1199 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1200 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1201 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1202 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1203 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1207 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1208 struct sctp_sndrcvinfo *sndrcvinfo;
1211 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1212 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1213 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1214 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1215 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1216 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1217 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1218 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1224 if (msg.msg_flags & MSG_NOTIFICATION) {
1225 snp = (union sctp_notification *)out;
1226 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1228 struct sctp_event event;
1230 struct sctp_event_subscribe event;
1231 socklen_t eventsize;
1234 * If a message has been delayed until the socket is dry,
1235 * it can be sent now.
1237 if (data->saved_message.length > 0) {
1238 dgram_sctp_write(data->saved_message.bio,
1239 data->saved_message.data,
1240 data->saved_message.length);
1241 OPENSSL_free(data->saved_message.data);
1242 data->saved_message.data = NULL;
1243 data->saved_message.length = 0;
1246 /* disable sender dry event */
1248 memset(&event, 0, sizeof(struct sctp_event));
1249 event.se_assoc_id = 0;
1250 event.se_type = SCTP_SENDER_DRY_EVENT;
1252 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1253 sizeof(struct sctp_event));
1259 eventsize = sizeof(struct sctp_event_subscribe);
1260 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1267 event.sctp_sender_dry_event = 0;
1269 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1270 sizeof(struct sctp_event_subscribe));
1277 # ifdef SCTP_AUTHENTICATION_EVENT
1278 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1279 dgram_sctp_handle_auth_free_key_event(b, snp);
1282 if (data->handle_notifications != NULL)
1283 data->handle_notifications(b, data->notification_context,
1286 memset(out, 0, outl);
1290 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1293 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1294 /* Partial message read, this should never happen! */
1297 * The buffer was too small, this means the peer sent a message
1298 * that was larger than allowed.
1304 * Test if socket buffer can handle max record size (2^14 + 2048
1307 optlen = (socklen_t) sizeof(int);
1308 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1310 OPENSSL_assert(optval >= 18445);
1313 * Test if SCTP doesn't partially deliver below max record size
1314 * (2^14 + 2048 + 13)
1316 optlen = (socklen_t) sizeof(int);
1318 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1321 OPENSSL_assert(optval >= 18445);
1324 * Partially delivered notification??? Probably a bug....
1326 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1329 * Everything seems ok till now, so it's most likely a message
1330 * dropped by PR-SCTP.
1332 memset(out, 0, outl);
1333 BIO_set_retry_read(b);
1337 BIO_clear_retry_flags(b);
1339 if (BIO_dgram_should_retry(ret)) {
1340 BIO_set_retry_read(b);
1341 data->_errno = get_last_socket_error();
1345 /* Test if peer uses SCTP-AUTH before continuing */
1346 if (!data->peer_auth_tested) {
1347 int ii, auth_data = 0, auth_forward = 0;
1349 struct sctp_authchunks *authchunks;
1352 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1353 authchunks = OPENSSL_malloc(optlen);
1355 BIOerr(BIO_F_DGRAM_SCTP_READ, ERR_R_MALLOC_FAILURE);
1358 memset(authchunks, 0, sizeof(optlen));
1359 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1360 authchunks, &optlen);
1363 for (p = (unsigned char *)authchunks->gauth_chunks;
1364 p < (unsigned char *)authchunks + optlen;
1365 p += sizeof(uint8_t)) {
1366 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1368 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1372 OPENSSL_free(authchunks);
1374 if (!auth_data || !auth_forward) {
1375 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1379 data->peer_auth_tested = 1;
1385 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1388 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1389 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1390 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1391 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1392 struct iovec iov[1];
1394 struct cmsghdr *cmsg;
1395 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1396 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1397 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1398 struct sctp_sndinfo *sndinfo;
1399 struct sctp_prinfo *prinfo;
1401 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1402 struct sctp_sndrcvinfo *sndrcvinfo;
1405 clear_socket_error();
1408 * If we're send anything else than application data, disable all user
1409 * parameters and flags.
1412 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1413 # ifdef SCTP_SACK_IMMEDIATELY
1414 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1416 sinfo = &handshake_sinfo;
1420 * If we have to send a shutdown alert message and the socket is not dry
1421 * yet, we have to save it and send it as soon as the socket gets dry.
1423 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b)) {
1425 data->saved_message.bio = b;
1426 if (!(tmp = OPENSSL_malloc(inl))) {
1427 BIOerr(BIO_F_DGRAM_SCTP_WRITE, ERR_R_MALLOC_FAILURE);
1430 if (data->saved_message.data)
1431 OPENSSL_free(data->saved_message.data);
1432 data->saved_message.data = tmp;
1433 memcpy(data->saved_message.data, in, inl);
1434 data->saved_message.length = inl;
1438 iov[0].iov_base = (char *)in;
1439 iov[0].iov_len = inl;
1440 msg.msg_name = NULL;
1441 msg.msg_namelen = 0;
1444 msg.msg_control = (caddr_t) cmsgbuf;
1445 msg.msg_controllen = 0;
1447 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1448 cmsg = (struct cmsghdr *)cmsgbuf;
1449 cmsg->cmsg_level = IPPROTO_SCTP;
1450 cmsg->cmsg_type = SCTP_SNDINFO;
1451 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1452 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1453 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1454 sndinfo->snd_sid = sinfo->snd_sid;
1455 sndinfo->snd_flags = sinfo->snd_flags;
1456 sndinfo->snd_ppid = sinfo->snd_ppid;
1457 sndinfo->snd_context = sinfo->snd_context;
1458 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1461 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1462 cmsg->cmsg_level = IPPROTO_SCTP;
1463 cmsg->cmsg_type = SCTP_PRINFO;
1464 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1465 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1466 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1467 prinfo->pr_policy = pinfo->pr_policy;
1468 prinfo->pr_value = pinfo->pr_value;
1469 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1471 cmsg = (struct cmsghdr *)cmsgbuf;
1472 cmsg->cmsg_level = IPPROTO_SCTP;
1473 cmsg->cmsg_type = SCTP_SNDRCV;
1474 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1475 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1476 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1477 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1478 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1480 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1482 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1483 sndrcvinfo->sinfo_context = sinfo->snd_context;
1484 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1485 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1488 ret = sendmsg(b->num, &msg, 0);
1490 BIO_clear_retry_flags(b);
1492 if (BIO_dgram_should_retry(ret)) {
1493 BIO_set_retry_write(b);
1494 data->_errno = get_last_socket_error();
1500 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1503 bio_dgram_sctp_data *data = NULL;
1504 socklen_t sockopt_len = 0;
1505 struct sctp_authkeyid authkeyid;
1506 struct sctp_authkey *authkey = NULL;
1508 data = (bio_dgram_sctp_data *) b->ptr;
1511 case BIO_CTRL_DGRAM_QUERY_MTU:
1513 * Set to maximum (2^14) and ignore user input to enable transport
1514 * protocol fragmentation. Returns always 2^14.
1519 case BIO_CTRL_DGRAM_SET_MTU:
1521 * Set to maximum (2^14) and ignore input to enable transport
1522 * protocol fragmentation. Returns always 2^14.
1527 case BIO_CTRL_DGRAM_SET_CONNECTED:
1528 case BIO_CTRL_DGRAM_CONNECT:
1529 /* Returns always -1. */
1532 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1534 * SCTP doesn't need the DTLS timer Returns always 1.
1537 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1539 * We allow transport protocol fragmentation so this is irrelevant
1543 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1545 data->in_handshake = 1;
1547 data->in_handshake = 0;
1550 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1551 &data->in_handshake, sizeof(int));
1553 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1555 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1558 /* Get active key */
1559 sockopt_len = sizeof(struct sctp_authkeyid);
1561 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1567 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1568 authkey = OPENSSL_malloc(sockopt_len);
1569 if (authkey == NULL) {
1573 memset(authkey, 0x00, sockopt_len);
1574 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1575 # ifndef __FreeBSD__
1577 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1578 * and higher work without it.
1580 authkey->sca_keylength = 64;
1582 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1585 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1587 OPENSSL_free(authkey);
1592 /* Reset active key */
1593 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1594 &authkeyid, sizeof(struct sctp_authkeyid));
1599 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1600 /* Returns 0 on success, -1 otherwise. */
1602 /* Get active key */
1603 sockopt_len = sizeof(struct sctp_authkeyid);
1605 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1610 /* Set active key */
1611 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1612 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1613 &authkeyid, sizeof(struct sctp_authkeyid));
1618 * CCS has been sent, so remember that and fall through to check if
1619 * we need to deactivate an old key
1623 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1624 /* Returns 0 on success, -1 otherwise. */
1627 * Has this command really been called or is this just a
1630 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1634 * CSS has been both, received and sent, so deactivate an old key
1636 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1637 /* Get active key */
1638 sockopt_len = sizeof(struct sctp_authkeyid);
1640 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1641 &authkeyid, &sockopt_len);
1646 * Deactivate key or delete second last key if
1647 * SCTP_AUTHENTICATION_EVENT is not available.
1649 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1650 # ifdef SCTP_AUTH_DEACTIVATE_KEY
1651 sockopt_len = sizeof(struct sctp_authkeyid);
1652 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1653 &authkeyid, sockopt_len);
1657 # ifndef SCTP_AUTHENTICATION_EVENT
1658 if (authkeyid.scact_keynumber > 0) {
1659 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1660 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1661 &authkeyid, sizeof(struct sctp_authkeyid));
1671 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1672 /* Returns the size of the copied struct. */
1673 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1674 num = sizeof(struct bio_dgram_sctp_sndinfo);
1676 memcpy(ptr, &(data->sndinfo), num);
1679 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1680 /* Returns the size of the copied struct. */
1681 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1682 num = sizeof(struct bio_dgram_sctp_sndinfo);
1684 memcpy(&(data->sndinfo), ptr, num);
1686 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1687 /* Returns the size of the copied struct. */
1688 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1689 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1691 memcpy(ptr, &data->rcvinfo, num);
1695 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1696 /* Returns the size of the copied struct. */
1697 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1698 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1700 memcpy(&(data->rcvinfo), ptr, num);
1702 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1703 /* Returns the size of the copied struct. */
1704 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1705 num = sizeof(struct bio_dgram_sctp_prinfo);
1707 memcpy(ptr, &(data->prinfo), num);
1710 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1711 /* Returns the size of the copied struct. */
1712 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1713 num = sizeof(struct bio_dgram_sctp_prinfo);
1715 memcpy(&(data->prinfo), ptr, num);
1717 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1718 /* Returns always 1. */
1720 data->save_shutdown = 1;
1722 data->save_shutdown = 0;
1727 * Pass to default ctrl function to process SCTP unspecific commands
1729 ret = dgram_ctrl(b, cmd, num, ptr);
1735 int BIO_dgram_sctp_notification_cb(BIO *b,
1736 void (*handle_notifications) (BIO *bio,
1742 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1744 if (handle_notifications != NULL) {
1745 data->handle_notifications = handle_notifications;
1746 data->notification_context = context;
1753 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1756 int n, sockflags, ret;
1757 union sctp_notification snp;
1761 struct sctp_event event;
1763 struct sctp_event_subscribe event;
1764 socklen_t eventsize;
1766 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1768 /* set sender dry event */
1770 memset(&event, 0, sizeof(struct sctp_event));
1771 event.se_assoc_id = 0;
1772 event.se_type = SCTP_SENDER_DRY_EVENT;
1775 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1776 sizeof(struct sctp_event));
1778 eventsize = sizeof(struct sctp_event_subscribe);
1779 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1783 event.sctp_sender_dry_event = 1;
1786 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1787 sizeof(struct sctp_event_subscribe));
1792 /* peek for notification */
1793 memset(&snp, 0x00, sizeof(union sctp_notification));
1794 iov.iov_base = (char *)&snp;
1795 iov.iov_len = sizeof(union sctp_notification);
1796 msg.msg_name = NULL;
1797 msg.msg_namelen = 0;
1800 msg.msg_control = NULL;
1801 msg.msg_controllen = 0;
1804 n = recvmsg(b->num, &msg, MSG_PEEK);
1806 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1807 && (get_last_socket_error() != EWOULDBLOCK))
1813 /* if we find a notification, process it and try again if necessary */
1814 while (msg.msg_flags & MSG_NOTIFICATION) {
1815 memset(&snp, 0x00, sizeof(union sctp_notification));
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;
1826 n = recvmsg(b->num, &msg, 0);
1828 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1829 && (get_last_socket_error() != EWOULDBLOCK))
1835 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1838 /* disable sender dry event */
1840 memset(&event, 0, sizeof(struct sctp_event));
1841 event.se_assoc_id = 0;
1842 event.se_type = SCTP_SENDER_DRY_EVENT;
1845 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1846 sizeof(struct sctp_event));
1848 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1850 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1855 event.sctp_sender_dry_event = 0;
1858 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1859 sizeof(struct sctp_event_subscribe));
1864 # ifdef SCTP_AUTHENTICATION_EVENT
1865 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1866 dgram_sctp_handle_auth_free_key_event(b, &snp);
1869 if (data->handle_notifications != NULL)
1870 data->handle_notifications(b, data->notification_context,
1873 /* found notification, peek again */
1874 memset(&snp, 0x00, sizeof(union sctp_notification));
1875 iov.iov_base = (char *)&snp;
1876 iov.iov_len = sizeof(union sctp_notification);
1877 msg.msg_name = NULL;
1878 msg.msg_namelen = 0;
1881 msg.msg_control = NULL;
1882 msg.msg_controllen = 0;
1885 /* if we have seen the dry already, don't wait */
1887 sockflags = fcntl(b->num, F_GETFL, 0);
1888 fcntl(b->num, F_SETFL, O_NONBLOCK);
1891 n = recvmsg(b->num, &msg, MSG_PEEK);
1894 fcntl(b->num, F_SETFL, sockflags);
1898 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1899 && (get_last_socket_error() != EWOULDBLOCK))
1906 /* read anything else */
1910 int BIO_dgram_sctp_msg_waiting(BIO *b)
1913 union sctp_notification snp;
1916 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1918 /* Check if there are any messages waiting to be read */
1920 memset(&snp, 0x00, sizeof(union sctp_notification));
1921 iov.iov_base = (char *)&snp;
1922 iov.iov_len = sizeof(union sctp_notification);
1923 msg.msg_name = NULL;
1924 msg.msg_namelen = 0;
1927 msg.msg_control = NULL;
1928 msg.msg_controllen = 0;
1931 sockflags = fcntl(b->num, F_GETFL, 0);
1932 fcntl(b->num, F_SETFL, O_NONBLOCK);
1933 n = recvmsg(b->num, &msg, MSG_PEEK);
1934 fcntl(b->num, F_SETFL, sockflags);
1936 /* if notification, process and try again */
1937 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1938 # ifdef SCTP_AUTHENTICATION_EVENT
1939 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1940 dgram_sctp_handle_auth_free_key_event(b, &snp);
1943 memset(&snp, 0x00, sizeof(union sctp_notification));
1944 iov.iov_base = (char *)&snp;
1945 iov.iov_len = sizeof(union sctp_notification);
1946 msg.msg_name = NULL;
1947 msg.msg_namelen = 0;
1950 msg.msg_control = NULL;
1951 msg.msg_controllen = 0;
1953 n = recvmsg(b->num, &msg, 0);
1955 if (data->handle_notifications != NULL)
1956 data->handle_notifications(b, data->notification_context,
1960 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1962 /* Return 1 if there is a message to be read, return 0 otherwise. */
1969 static int dgram_sctp_puts(BIO *bp, const char *str)
1974 ret = dgram_sctp_write(bp, str, n);
1979 static int BIO_dgram_should_retry(int i)
1983 if ((i == 0) || (i == -1)) {
1984 err = get_last_socket_error();
1986 # if defined(OPENSSL_SYS_WINDOWS)
1988 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1989 * this point, the error code was overwritten by another system call
1990 * before this error handling is called.
1994 return (BIO_dgram_non_fatal_error(err));
1999 int BIO_dgram_non_fatal_error(int err)
2002 # if defined(OPENSSL_SYS_WINDOWS)
2003 # if defined(WSAEWOULDBLOCK)
2004 case WSAEWOULDBLOCK:
2007 # if 0 /* This appears to always be an error */
2008 # if defined(WSAENOTCONN)
2015 # ifdef WSAEWOULDBLOCK
2016 # if WSAEWOULDBLOCK != EWOULDBLOCK
2029 # if EWOULDBLOCK != EAGAIN
2054 static void get_current_time(struct timeval *t)
2056 # if defined(_WIN32)
2059 unsigned __int64 ul;
2064 SystemTimeToFileTime(&st, &now.ft);
2066 now.ul -= 116444736000000000ULL;
2068 now.ul -= 116444736000000000UI64; /* re-bias to 1/1/1970 */
2070 t->tv_sec = (long)(now.ul / 10000000);
2071 t->tv_usec = ((int)(now.ul % 10000000)) / 10;
2072 # elif defined(OPENSSL_SYS_VMS)
2075 t->tv_sec = (long)tb.time;
2076 t->tv_usec = (long)tb.millitm * 1000;
2078 gettimeofday(t, NULL);