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 if (timeleft.tv_usec < timenow.tv_usec) {
307 timeleft.tv_usec = 1000000 - timenow.tv_usec + timeleft.tv_usec;
310 timeleft.tv_usec -= timenow.tv_usec;
312 if (timeleft.tv_sec < timenow.tv_sec) {
314 timeleft.tv_usec = 1;
316 timeleft.tv_sec -= timenow.tv_sec;
320 * Adjust socket timeout if next handhake message timer will expire
323 if ((data->socket_timeout.tv_sec == 0
324 && data->socket_timeout.tv_usec == 0)
325 || (data->socket_timeout.tv_sec > timeleft.tv_sec)
326 || (data->socket_timeout.tv_sec == timeleft.tv_sec
327 && data->socket_timeout.tv_usec >= timeleft.tv_usec)) {
328 # ifdef OPENSSL_SYS_WINDOWS
329 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
330 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
331 (void *)&timeout, sizeof(timeout)) < 0) {
332 perror("setsockopt");
335 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
336 sizeof(struct timeval)) < 0) {
337 perror("setsockopt");
345 static void dgram_reset_rcv_timeout(BIO *b)
347 # if defined(SO_RCVTIMEO)
348 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
350 /* Is a timer active? */
351 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
352 # ifdef OPENSSL_SYS_WINDOWS
353 int timeout = data->socket_timeout.tv_sec * 1000 +
354 data->socket_timeout.tv_usec / 1000;
355 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
356 (void *)&timeout, sizeof(timeout)) < 0) {
357 perror("setsockopt");
361 (b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
362 sizeof(struct timeval)) < 0) {
363 perror("setsockopt");
370 static int dgram_read(BIO *b, char *out, int outl)
373 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
377 * See commentary in b_sock.c. <appro>
385 struct sockaddr_in sa_in;
386 # if OPENSSL_USE_IPV6
387 struct sockaddr_in6 sa_in6;
393 sa.len.i = sizeof(sa.peer);
396 clear_socket_error();
397 memset(&sa.peer, 0x00, sizeof(sa.peer));
398 dgram_adjust_rcv_timeout(b);
399 ret = recvfrom(b->num, out, outl, 0, &sa.peer.sa, (void *)&sa.len);
400 if (sizeof(sa.len.i) != sizeof(sa.len.s) && sa.len.i == 0) {
401 OPENSSL_assert(sa.len.s <= sizeof(sa.peer));
402 sa.len.i = (int)sa.len.s;
405 if (!data->connected && ret >= 0)
406 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
408 BIO_clear_retry_flags(b);
410 if (BIO_dgram_should_retry(ret)) {
411 BIO_set_retry_read(b);
412 data->_errno = get_last_socket_error();
416 dgram_reset_rcv_timeout(b);
421 static int dgram_write(BIO *b, const char *in, int inl)
424 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
425 clear_socket_error();
428 ret = writesocket(b->num, in, inl);
430 int peerlen = sizeof(data->peer);
432 if (data->peer.sa.sa_family == AF_INET)
433 peerlen = sizeof(data->peer.sa_in);
434 # if OPENSSL_USE_IPV6
435 else if (data->peer.sa.sa_family == AF_INET6)
436 peerlen = sizeof(data->peer.sa_in6);
438 # if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
439 ret = sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
441 ret = sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
445 BIO_clear_retry_flags(b);
447 if (BIO_dgram_should_retry(ret)) {
448 BIO_set_retry_write(b);
449 data->_errno = get_last_socket_error();
451 # if 0 /* higher layers are responsible for querying
452 * MTU, if necessary */
453 if (data->_errno == EMSGSIZE)
454 /* retrieve the new MTU */
455 BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
462 static long dgram_get_mtu_overhead(bio_dgram_data *data)
466 switch (data->peer.sa.sa_family) {
469 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
473 # if OPENSSL_USE_IPV6
475 # ifdef IN6_IS_ADDR_V4MAPPED
476 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
478 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
484 * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
490 /* We don't know. Go with the historical default */
497 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
501 struct sockaddr *to = NULL;
502 bio_dgram_data *data = NULL;
504 # if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
505 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
506 * modern enough to define socklen_t */
510 struct sockaddr_in s4;
511 # if OPENSSL_USE_IPV6
512 struct sockaddr_in6 s6;
517 data = (bio_dgram_data *)b->ptr;
522 case BIO_C_FILE_SEEK:
525 case BIO_C_FILE_TELL:
531 b->num = *((int *)ptr);
532 b->shutdown = (int)num;
544 case BIO_CTRL_GET_CLOSE:
547 case BIO_CTRL_SET_CLOSE:
548 b->shutdown = (int)num;
550 case BIO_CTRL_PENDING:
551 case BIO_CTRL_WPENDING:
558 case BIO_CTRL_DGRAM_CONNECT:
559 to = (struct sockaddr *)ptr;
561 if (connect(b->num, to, sizeof(struct sockaddr)) < 0) {
566 switch (to->sa_family) {
568 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
570 # if OPENSSL_USE_IPV6
572 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
576 memcpy(&data->peer, to, sizeof(data->peer.sa));
583 /* (Linux)kernel sets DF bit on outgoing IP packets */
584 case BIO_CTRL_DGRAM_MTU_DISCOVER:
585 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
586 addr_len = (socklen_t) sizeof(addr);
587 memset((void *)&addr, 0, sizeof(addr));
588 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
592 switch (addr.sa.sa_family) {
594 sockopt_val = IP_PMTUDISC_DO;
595 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
596 &sockopt_val, sizeof(sockopt_val))) < 0)
597 perror("setsockopt");
599 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
601 sockopt_val = IPV6_PMTUDISC_DO;
602 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
603 &sockopt_val, sizeof(sockopt_val))) < 0)
604 perror("setsockopt");
615 case BIO_CTRL_DGRAM_QUERY_MTU:
616 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
617 addr_len = (socklen_t) sizeof(addr);
618 memset((void *)&addr, 0, sizeof(addr));
619 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
623 sockopt_len = sizeof(sockopt_val);
624 switch (addr.sa.sa_family) {
627 getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
628 &sockopt_len)) < 0 || sockopt_val < 0) {
632 * we assume that the transport protocol is UDP and no IP
635 data->mtu = sockopt_val - 8 - 20;
639 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
642 getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
643 (void *)&sockopt_val, &sockopt_len)) < 0
644 || sockopt_val < 0) {
648 * we assume that the transport protocol is UDP and no IPV6
651 data->mtu = sockopt_val - 8 - 40;
664 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
665 ret = -dgram_get_mtu_overhead(data);
666 switch (data->peer.sa.sa_family) {
670 # if OPENSSL_USE_IPV6
672 # ifdef IN6_IS_ADDR_V4MAPPED
673 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
685 case BIO_CTRL_DGRAM_GET_MTU:
688 case BIO_CTRL_DGRAM_SET_MTU:
692 case BIO_CTRL_DGRAM_SET_CONNECTED:
693 to = (struct sockaddr *)ptr;
697 switch (to->sa_family) {
699 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
701 # if OPENSSL_USE_IPV6
703 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
707 memcpy(&data->peer, to, sizeof(data->peer.sa));
712 memset(&(data->peer), 0x00, sizeof(data->peer));
715 case BIO_CTRL_DGRAM_GET_PEER:
716 switch (data->peer.sa.sa_family) {
718 ret = sizeof(data->peer.sa_in);
720 # if OPENSSL_USE_IPV6
722 ret = sizeof(data->peer.sa_in6);
726 ret = sizeof(data->peer.sa);
729 if (num == 0 || num > ret)
731 memcpy(ptr, &data->peer, (ret = num));
733 case BIO_CTRL_DGRAM_SET_PEER:
734 to = (struct sockaddr *)ptr;
735 switch (to->sa_family) {
737 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
739 # if OPENSSL_USE_IPV6
741 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
745 memcpy(&data->peer, to, sizeof(data->peer.sa));
749 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
750 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
752 # if defined(SO_RCVTIMEO)
753 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
754 # ifdef OPENSSL_SYS_WINDOWS
756 struct timeval *tv = (struct timeval *)ptr;
757 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
758 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
759 (void *)&timeout, sizeof(timeout)) < 0) {
760 perror("setsockopt");
765 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
766 sizeof(struct timeval)) < 0) {
767 perror("setsockopt");
772 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
780 # ifdef OPENSSL_SYS_WINDOWS
782 struct timeval *tv = (struct timeval *)ptr;
784 sz.i = sizeof(timeout);
785 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
786 (void *)&timeout, &sz.i) < 0) {
787 perror("getsockopt");
790 tv->tv_sec = timeout / 1000;
791 tv->tv_usec = (timeout % 1000) * 1000;
795 sz.i = sizeof(struct timeval);
796 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
797 ptr, (void *)&sz) < 0) {
798 perror("getsockopt");
800 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
801 OPENSSL_assert(sz.s <= sizeof(struct timeval));
809 # if defined(SO_SNDTIMEO)
810 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
811 # ifdef OPENSSL_SYS_WINDOWS
813 struct timeval *tv = (struct timeval *)ptr;
814 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
815 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
816 (void *)&timeout, sizeof(timeout)) < 0) {
817 perror("setsockopt");
822 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
823 sizeof(struct timeval)) < 0) {
824 perror("setsockopt");
829 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
837 # ifdef OPENSSL_SYS_WINDOWS
839 struct timeval *tv = (struct timeval *)ptr;
841 sz.i = sizeof(timeout);
842 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
843 (void *)&timeout, &sz.i) < 0) {
844 perror("getsockopt");
847 tv->tv_sec = timeout / 1000;
848 tv->tv_usec = (timeout % 1000) * 1000;
852 sz.i = sizeof(struct timeval);
853 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
854 ptr, (void *)&sz) < 0) {
855 perror("getsockopt");
857 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
858 OPENSSL_assert(sz.s <= sizeof(struct timeval));
866 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
868 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
869 # ifdef OPENSSL_SYS_WINDOWS
870 if (data->_errno == WSAETIMEDOUT)
872 if (data->_errno == EAGAIN)
881 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
882 if (data->_errno == EMSGSIZE) {
889 case BIO_CTRL_DGRAM_SET_DONT_FRAG:
890 sockopt_val = num ? 1 : 0;
892 switch (data->peer.sa.sa_family) {
894 # if defined(IP_DONTFRAG)
895 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG,
896 &sockopt_val, sizeof(sockopt_val))) < 0) {
897 perror("setsockopt");
900 # elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTUDISCOVER)
901 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
902 (ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
903 &sockopt_val, sizeof(sockopt_val))) < 0) {
904 perror("setsockopt");
907 # elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT)
908 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT,
909 (const char *)&sockopt_val,
910 sizeof(sockopt_val))) < 0) {
911 perror("setsockopt");
918 # if OPENSSL_USE_IPV6
920 # if defined(IPV6_DONTFRAG)
921 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
922 (const void *)&sockopt_val,
923 sizeof(sockopt_val))) < 0) {
924 perror("setsockopt");
927 # elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER)
928 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
929 (ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
930 &sockopt_val, sizeof(sockopt_val))) < 0) {
931 perror("setsockopt");
944 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
945 ret = dgram_get_mtu_overhead(data);
954 static int dgram_puts(BIO *bp, const char *str)
959 ret = dgram_write(bp, str, n);
963 # ifndef OPENSSL_NO_SCTP
964 BIO_METHOD *BIO_s_datagram_sctp(void)
966 return (&methods_dgramp_sctp);
969 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
972 int ret, optval = 20000;
973 int auth_data = 0, auth_forward = 0;
975 struct sctp_authchunk auth;
976 struct sctp_authchunks *authchunks;
977 socklen_t sockopt_len;
978 # ifdef SCTP_AUTHENTICATION_EVENT
980 struct sctp_event event;
982 struct sctp_event_subscribe event;
986 bio = BIO_new(BIO_s_datagram_sctp());
989 BIO_set_fd(bio, fd, close_flag);
991 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
992 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
994 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
995 sizeof(struct sctp_authchunk));
1000 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
1002 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
1003 sizeof(struct sctp_authchunk));
1010 * Test if activation was successful. When using accept(), SCTP-AUTH has
1011 * to be activated for the listening socket already, otherwise the
1012 * connected socket won't use it.
1014 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1015 authchunks = OPENSSL_malloc(sockopt_len);
1020 memset(authchunks, 0, sizeof(sockopt_len));
1022 getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
1026 OPENSSL_free(authchunks);
1031 for (p = (unsigned char *)authchunks->gauth_chunks;
1032 p < (unsigned char *)authchunks + sockopt_len;
1033 p += sizeof(uint8_t)) {
1034 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1036 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1040 OPENSSL_free(authchunks);
1042 OPENSSL_assert(auth_data);
1043 OPENSSL_assert(auth_forward);
1045 # ifdef SCTP_AUTHENTICATION_EVENT
1047 memset(&event, 0, sizeof(struct sctp_event));
1048 event.se_assoc_id = 0;
1049 event.se_type = SCTP_AUTHENTICATION_EVENT;
1052 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
1053 sizeof(struct sctp_event));
1059 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
1060 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
1066 event.sctp_authentication_event = 1;
1069 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
1070 sizeof(struct sctp_event_subscribe));
1079 * Disable partial delivery by setting the min size larger than the max
1080 * record size of 2^14 + 2048 + 13
1083 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
1093 int BIO_dgram_is_sctp(BIO *bio)
1095 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
1098 static int dgram_sctp_new(BIO *bi)
1100 bio_dgram_sctp_data *data = NULL;
1104 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
1107 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
1108 # ifdef SCTP_PR_SCTP_NONE
1109 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1117 static int dgram_sctp_free(BIO *a)
1119 bio_dgram_sctp_data *data;
1123 if (!dgram_clear(a))
1126 data = (bio_dgram_sctp_data *) a->ptr;
1128 if (data->saved_message.data != NULL)
1129 OPENSSL_free(data->saved_message.data);
1136 # ifdef SCTP_AUTHENTICATION_EVENT
1137 void dgram_sctp_handle_auth_free_key_event(BIO *b,
1138 union sctp_notification *snp)
1141 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
1143 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
1144 struct sctp_authkeyid authkeyid;
1147 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1148 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1149 &authkeyid, sizeof(struct sctp_authkeyid));
1154 static int dgram_sctp_read(BIO *b, char *out, int outl)
1156 int ret = 0, n = 0, i, optval;
1158 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1159 union sctp_notification *snp;
1162 struct cmsghdr *cmsg;
1166 clear_socket_error();
1169 memset(&data->rcvinfo, 0x00,
1170 sizeof(struct bio_dgram_sctp_rcvinfo));
1173 msg.msg_name = NULL;
1174 msg.msg_namelen = 0;
1177 msg.msg_control = cmsgbuf;
1178 msg.msg_controllen = 512;
1180 n = recvmsg(b->num, &msg, 0);
1188 if (msg.msg_controllen > 0) {
1189 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1190 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1191 if (cmsg->cmsg_level != IPPROTO_SCTP)
1193 # ifdef SCTP_RCVINFO
1194 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1195 struct sctp_rcvinfo *rcvinfo;
1197 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1198 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1199 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1200 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1201 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1202 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1203 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1204 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1208 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1209 struct sctp_sndrcvinfo *sndrcvinfo;
1212 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1213 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1214 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1215 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1216 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1217 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1218 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1219 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1225 if (msg.msg_flags & MSG_NOTIFICATION) {
1226 snp = (union sctp_notification *)out;
1227 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1229 struct sctp_event event;
1231 struct sctp_event_subscribe event;
1232 socklen_t eventsize;
1235 * If a message has been delayed until the socket is dry,
1236 * it can be sent now.
1238 if (data->saved_message.length > 0) {
1239 dgram_sctp_write(data->saved_message.bio,
1240 data->saved_message.data,
1241 data->saved_message.length);
1242 OPENSSL_free(data->saved_message.data);
1243 data->saved_message.data = NULL;
1244 data->saved_message.length = 0;
1247 /* disable sender dry event */
1249 memset(&event, 0, sizeof(struct sctp_event));
1250 event.se_assoc_id = 0;
1251 event.se_type = SCTP_SENDER_DRY_EVENT;
1253 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1254 sizeof(struct sctp_event));
1260 eventsize = sizeof(struct sctp_event_subscribe);
1261 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1268 event.sctp_sender_dry_event = 0;
1270 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1271 sizeof(struct sctp_event_subscribe));
1278 # ifdef SCTP_AUTHENTICATION_EVENT
1279 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1280 dgram_sctp_handle_auth_free_key_event(b, snp);
1283 if (data->handle_notifications != NULL)
1284 data->handle_notifications(b, data->notification_context,
1287 memset(out, 0, outl);
1291 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1294 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1295 /* Partial message read, this should never happen! */
1298 * The buffer was too small, this means the peer sent a message
1299 * that was larger than allowed.
1305 * Test if socket buffer can handle max record size (2^14 + 2048
1308 optlen = (socklen_t) sizeof(int);
1309 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1311 OPENSSL_assert(optval >= 18445);
1314 * Test if SCTP doesn't partially deliver below max record size
1315 * (2^14 + 2048 + 13)
1317 optlen = (socklen_t) sizeof(int);
1319 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1322 OPENSSL_assert(optval >= 18445);
1325 * Partially delivered notification??? Probably a bug....
1327 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1330 * Everything seems ok till now, so it's most likely a message
1331 * dropped by PR-SCTP.
1333 memset(out, 0, outl);
1334 BIO_set_retry_read(b);
1338 BIO_clear_retry_flags(b);
1340 if (BIO_dgram_should_retry(ret)) {
1341 BIO_set_retry_read(b);
1342 data->_errno = get_last_socket_error();
1346 /* Test if peer uses SCTP-AUTH before continuing */
1347 if (!data->peer_auth_tested) {
1348 int ii, auth_data = 0, auth_forward = 0;
1350 struct sctp_authchunks *authchunks;
1353 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1354 authchunks = OPENSSL_malloc(optlen);
1356 BIOerr(BIO_F_DGRAM_SCTP_READ, ERR_R_MALLOC_FAILURE);
1359 memset(authchunks, 0, sizeof(optlen));
1360 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1361 authchunks, &optlen);
1364 for (p = (unsigned char *)authchunks->gauth_chunks;
1365 p < (unsigned char *)authchunks + optlen;
1366 p += sizeof(uint8_t)) {
1367 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1369 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1373 OPENSSL_free(authchunks);
1375 if (!auth_data || !auth_forward) {
1376 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1380 data->peer_auth_tested = 1;
1386 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1389 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1390 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1391 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1392 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1393 struct iovec iov[1];
1395 struct cmsghdr *cmsg;
1396 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1397 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1398 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1399 struct sctp_sndinfo *sndinfo;
1400 struct sctp_prinfo *prinfo;
1402 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1403 struct sctp_sndrcvinfo *sndrcvinfo;
1406 clear_socket_error();
1409 * If we're send anything else than application data, disable all user
1410 * parameters and flags.
1413 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1414 # ifdef SCTP_SACK_IMMEDIATELY
1415 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1417 sinfo = &handshake_sinfo;
1421 * If we have to send a shutdown alert message and the socket is not dry
1422 * yet, we have to save it and send it as soon as the socket gets dry.
1424 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b)) {
1426 data->saved_message.bio = b;
1427 if (!(tmp = OPENSSL_malloc(inl))) {
1428 BIOerr(BIO_F_DGRAM_SCTP_WRITE, ERR_R_MALLOC_FAILURE);
1431 if (data->saved_message.data)
1432 OPENSSL_free(data->saved_message.data);
1433 data->saved_message.data = tmp;
1434 memcpy(data->saved_message.data, in, inl);
1435 data->saved_message.length = inl;
1439 iov[0].iov_base = (char *)in;
1440 iov[0].iov_len = inl;
1441 msg.msg_name = NULL;
1442 msg.msg_namelen = 0;
1445 msg.msg_control = (caddr_t) cmsgbuf;
1446 msg.msg_controllen = 0;
1448 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1449 cmsg = (struct cmsghdr *)cmsgbuf;
1450 cmsg->cmsg_level = IPPROTO_SCTP;
1451 cmsg->cmsg_type = SCTP_SNDINFO;
1452 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1453 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1454 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1455 sndinfo->snd_sid = sinfo->snd_sid;
1456 sndinfo->snd_flags = sinfo->snd_flags;
1457 sndinfo->snd_ppid = sinfo->snd_ppid;
1458 sndinfo->snd_context = sinfo->snd_context;
1459 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1462 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1463 cmsg->cmsg_level = IPPROTO_SCTP;
1464 cmsg->cmsg_type = SCTP_PRINFO;
1465 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1466 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1467 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1468 prinfo->pr_policy = pinfo->pr_policy;
1469 prinfo->pr_value = pinfo->pr_value;
1470 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1472 cmsg = (struct cmsghdr *)cmsgbuf;
1473 cmsg->cmsg_level = IPPROTO_SCTP;
1474 cmsg->cmsg_type = SCTP_SNDRCV;
1475 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1476 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1477 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1478 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1479 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1481 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1483 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1484 sndrcvinfo->sinfo_context = sinfo->snd_context;
1485 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1486 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1489 ret = sendmsg(b->num, &msg, 0);
1491 BIO_clear_retry_flags(b);
1493 if (BIO_dgram_should_retry(ret)) {
1494 BIO_set_retry_write(b);
1495 data->_errno = get_last_socket_error();
1501 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1504 bio_dgram_sctp_data *data = NULL;
1505 socklen_t sockopt_len = 0;
1506 struct sctp_authkeyid authkeyid;
1507 struct sctp_authkey *authkey = NULL;
1509 data = (bio_dgram_sctp_data *) b->ptr;
1512 case BIO_CTRL_DGRAM_QUERY_MTU:
1514 * Set to maximum (2^14) and ignore user input to enable transport
1515 * protocol fragmentation. Returns always 2^14.
1520 case BIO_CTRL_DGRAM_SET_MTU:
1522 * Set to maximum (2^14) and ignore input to enable transport
1523 * protocol fragmentation. Returns always 2^14.
1528 case BIO_CTRL_DGRAM_SET_CONNECTED:
1529 case BIO_CTRL_DGRAM_CONNECT:
1530 /* Returns always -1. */
1533 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1535 * SCTP doesn't need the DTLS timer Returns always 1.
1538 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1540 * We allow transport protocol fragmentation so this is irrelevant
1544 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1546 data->in_handshake = 1;
1548 data->in_handshake = 0;
1551 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1552 &data->in_handshake, sizeof(int));
1554 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1556 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1559 /* Get active key */
1560 sockopt_len = sizeof(struct sctp_authkeyid);
1562 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1568 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1569 authkey = OPENSSL_malloc(sockopt_len);
1570 if (authkey == NULL) {
1574 memset(authkey, 0x00, sockopt_len);
1575 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1576 # ifndef __FreeBSD__
1578 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1579 * and higher work without it.
1581 authkey->sca_keylength = 64;
1583 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1586 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1588 OPENSSL_free(authkey);
1593 /* Reset active key */
1594 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1595 &authkeyid, sizeof(struct sctp_authkeyid));
1600 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1601 /* Returns 0 on success, -1 otherwise. */
1603 /* Get active key */
1604 sockopt_len = sizeof(struct sctp_authkeyid);
1606 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1611 /* Set active key */
1612 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1613 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1614 &authkeyid, sizeof(struct sctp_authkeyid));
1619 * CCS has been sent, so remember that and fall through to check if
1620 * we need to deactivate an old key
1624 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1625 /* Returns 0 on success, -1 otherwise. */
1628 * Has this command really been called or is this just a
1631 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1635 * CSS has been both, received and sent, so deactivate an old key
1637 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1638 /* Get active key */
1639 sockopt_len = sizeof(struct sctp_authkeyid);
1641 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1642 &authkeyid, &sockopt_len);
1647 * Deactivate key or delete second last key if
1648 * SCTP_AUTHENTICATION_EVENT is not available.
1650 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1651 # ifdef SCTP_AUTH_DEACTIVATE_KEY
1652 sockopt_len = sizeof(struct sctp_authkeyid);
1653 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1654 &authkeyid, sockopt_len);
1658 # ifndef SCTP_AUTHENTICATION_EVENT
1659 if (authkeyid.scact_keynumber > 0) {
1660 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1661 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1662 &authkeyid, sizeof(struct sctp_authkeyid));
1672 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1673 /* Returns the size of the copied struct. */
1674 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1675 num = sizeof(struct bio_dgram_sctp_sndinfo);
1677 memcpy(ptr, &(data->sndinfo), num);
1680 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1681 /* Returns the size of the copied struct. */
1682 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1683 num = sizeof(struct bio_dgram_sctp_sndinfo);
1685 memcpy(&(data->sndinfo), ptr, num);
1687 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1688 /* Returns the size of the copied struct. */
1689 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1690 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1692 memcpy(ptr, &data->rcvinfo, num);
1696 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1697 /* Returns the size of the copied struct. */
1698 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1699 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1701 memcpy(&(data->rcvinfo), ptr, num);
1703 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1704 /* Returns the size of the copied struct. */
1705 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1706 num = sizeof(struct bio_dgram_sctp_prinfo);
1708 memcpy(ptr, &(data->prinfo), num);
1711 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1712 /* Returns the size of the copied struct. */
1713 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1714 num = sizeof(struct bio_dgram_sctp_prinfo);
1716 memcpy(&(data->prinfo), ptr, num);
1718 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1719 /* Returns always 1. */
1721 data->save_shutdown = 1;
1723 data->save_shutdown = 0;
1728 * Pass to default ctrl function to process SCTP unspecific commands
1730 ret = dgram_ctrl(b, cmd, num, ptr);
1736 int BIO_dgram_sctp_notification_cb(BIO *b,
1737 void (*handle_notifications) (BIO *bio,
1743 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1745 if (handle_notifications != NULL) {
1746 data->handle_notifications = handle_notifications;
1747 data->notification_context = context;
1754 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1757 int n, sockflags, ret;
1758 union sctp_notification snp;
1762 struct sctp_event event;
1764 struct sctp_event_subscribe event;
1765 socklen_t eventsize;
1767 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1769 /* set sender dry event */
1771 memset(&event, 0, sizeof(struct sctp_event));
1772 event.se_assoc_id = 0;
1773 event.se_type = SCTP_SENDER_DRY_EVENT;
1776 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1777 sizeof(struct sctp_event));
1779 eventsize = sizeof(struct sctp_event_subscribe);
1780 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1784 event.sctp_sender_dry_event = 1;
1787 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1788 sizeof(struct sctp_event_subscribe));
1793 /* peek for notification */
1794 memset(&snp, 0x00, sizeof(union sctp_notification));
1795 iov.iov_base = (char *)&snp;
1796 iov.iov_len = sizeof(union sctp_notification);
1797 msg.msg_name = NULL;
1798 msg.msg_namelen = 0;
1801 msg.msg_control = NULL;
1802 msg.msg_controllen = 0;
1805 n = recvmsg(b->num, &msg, MSG_PEEK);
1807 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1808 && (get_last_socket_error() != EWOULDBLOCK))
1814 /* if we find a notification, process it and try again if necessary */
1815 while (msg.msg_flags & MSG_NOTIFICATION) {
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 n = recvmsg(b->num, &msg, 0);
1829 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1830 && (get_last_socket_error() != EWOULDBLOCK))
1836 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1839 /* disable sender dry event */
1841 memset(&event, 0, sizeof(struct sctp_event));
1842 event.se_assoc_id = 0;
1843 event.se_type = SCTP_SENDER_DRY_EVENT;
1846 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1847 sizeof(struct sctp_event));
1849 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1851 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1856 event.sctp_sender_dry_event = 0;
1859 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1860 sizeof(struct sctp_event_subscribe));
1865 # ifdef SCTP_AUTHENTICATION_EVENT
1866 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1867 dgram_sctp_handle_auth_free_key_event(b, &snp);
1870 if (data->handle_notifications != NULL)
1871 data->handle_notifications(b, data->notification_context,
1874 /* found notification, peek again */
1875 memset(&snp, 0x00, sizeof(union sctp_notification));
1876 iov.iov_base = (char *)&snp;
1877 iov.iov_len = sizeof(union sctp_notification);
1878 msg.msg_name = NULL;
1879 msg.msg_namelen = 0;
1882 msg.msg_control = NULL;
1883 msg.msg_controllen = 0;
1886 /* if we have seen the dry already, don't wait */
1888 sockflags = fcntl(b->num, F_GETFL, 0);
1889 fcntl(b->num, F_SETFL, O_NONBLOCK);
1892 n = recvmsg(b->num, &msg, MSG_PEEK);
1895 fcntl(b->num, F_SETFL, sockflags);
1899 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1900 && (get_last_socket_error() != EWOULDBLOCK))
1907 /* read anything else */
1911 int BIO_dgram_sctp_msg_waiting(BIO *b)
1914 union sctp_notification snp;
1917 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1919 /* Check if there are any messages waiting to be read */
1921 memset(&snp, 0x00, sizeof(union sctp_notification));
1922 iov.iov_base = (char *)&snp;
1923 iov.iov_len = sizeof(union sctp_notification);
1924 msg.msg_name = NULL;
1925 msg.msg_namelen = 0;
1928 msg.msg_control = NULL;
1929 msg.msg_controllen = 0;
1932 sockflags = fcntl(b->num, F_GETFL, 0);
1933 fcntl(b->num, F_SETFL, O_NONBLOCK);
1934 n = recvmsg(b->num, &msg, MSG_PEEK);
1935 fcntl(b->num, F_SETFL, sockflags);
1937 /* if notification, process and try again */
1938 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1939 # ifdef SCTP_AUTHENTICATION_EVENT
1940 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1941 dgram_sctp_handle_auth_free_key_event(b, &snp);
1944 memset(&snp, 0x00, sizeof(union sctp_notification));
1945 iov.iov_base = (char *)&snp;
1946 iov.iov_len = sizeof(union sctp_notification);
1947 msg.msg_name = NULL;
1948 msg.msg_namelen = 0;
1951 msg.msg_control = NULL;
1952 msg.msg_controllen = 0;
1954 n = recvmsg(b->num, &msg, 0);
1956 if (data->handle_notifications != NULL)
1957 data->handle_notifications(b, data->notification_context,
1961 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1963 /* Return 1 if there is a message to be read, return 0 otherwise. */
1970 static int dgram_sctp_puts(BIO *bp, const char *str)
1975 ret = dgram_sctp_write(bp, str, n);
1980 static int BIO_dgram_should_retry(int i)
1984 if ((i == 0) || (i == -1)) {
1985 err = get_last_socket_error();
1987 # if defined(OPENSSL_SYS_WINDOWS)
1989 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1990 * this point, the error code was overwritten by another system call
1991 * before this error handling is called.
1995 return (BIO_dgram_non_fatal_error(err));
2000 int BIO_dgram_non_fatal_error(int err)
2003 # if defined(OPENSSL_SYS_WINDOWS)
2004 # if defined(WSAEWOULDBLOCK)
2005 case WSAEWOULDBLOCK:
2008 # if 0 /* This appears to always be an error */
2009 # if defined(WSAENOTCONN)
2016 # ifdef WSAEWOULDBLOCK
2017 # if WSAEWOULDBLOCK != EWOULDBLOCK
2030 # if EWOULDBLOCK != EAGAIN
2055 static void get_current_time(struct timeval *t)
2057 # if defined(_WIN32)
2060 unsigned __int64 ul;
2065 SystemTimeToFileTime(&st, &now.ft);
2067 now.ul -= 116444736000000000ULL;
2069 now.ul -= 116444736000000000UI64; /* re-bias to 1/1/1970 */
2071 t->tv_sec = (long)(now.ul / 10000000);
2072 t->tv_usec = ((int)(now.ul % 10000000)) / 10;
2073 # elif defined(OPENSSL_SYS_VMS)
2076 t->tv_sec = (long)tb.time;
2077 t->tv_usec = (long)tb.millitm * 1000;
2079 gettimeofday(t, NULL);