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(_WIN32) || defined(OPENSSL_SYS_VMS))
69 # include <sys/time.h>
71 # if defined(OPENSSL_SYS_VMS)
72 # include <sys/timeb.h>
75 # ifndef OPENSSL_NO_SCTP
76 # include <netinet/sctp.h>
78 # define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
79 # define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
82 # if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
83 # define IP_MTU 14 /* linux is lame */
86 # if OPENSSL_USE_IPV6 && !defined(IPPROTO_IPV6)
87 # define IPPROTO_IPV6 41 /* windows is lame */
90 # if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
91 /* Standard definition causes type-punning problems. */
92 # undef IN6_IS_ADDR_V4MAPPED
93 # define s6_addr32 __u6_addr.__u6_addr32
94 # define IN6_IS_ADDR_V4MAPPED(a) \
95 (((a)->s6_addr32[0] == 0) && \
96 ((a)->s6_addr32[1] == 0) && \
97 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
101 # define sock_write SockWrite /* Watt-32 uses same names */
102 # define sock_read SockRead
103 # define sock_puts SockPuts
106 static int dgram_write(BIO *h, const char *buf, int num);
107 static int dgram_read(BIO *h, char *buf, int size);
108 static int dgram_puts(BIO *h, const char *str);
109 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
110 static int dgram_new(BIO *h);
111 static int dgram_free(BIO *data);
112 static int dgram_clear(BIO *bio);
114 # ifndef OPENSSL_NO_SCTP
115 static int dgram_sctp_write(BIO *h, const char *buf, int num);
116 static int dgram_sctp_read(BIO *h, char *buf, int size);
117 static int dgram_sctp_puts(BIO *h, const char *str);
118 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
119 static int dgram_sctp_new(BIO *h);
120 static int dgram_sctp_free(BIO *data);
121 # ifdef SCTP_AUTHENTICATION_EVENT
122 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification
127 static int BIO_dgram_should_retry(int s);
129 static void get_current_time(struct timeval *t);
131 static BIO_METHOD methods_dgramp = {
137 NULL, /* dgram_gets, */
144 # ifndef OPENSSL_NO_SCTP
145 static BIO_METHOD methods_dgramp_sctp = {
147 "datagram sctp socket",
151 NULL, /* dgram_gets, */
159 typedef struct bio_dgram_data_st {
162 struct sockaddr_in sa_in;
163 # if OPENSSL_USE_IPV6
164 struct sockaddr_in6 sa_in6;
167 unsigned int connected;
170 struct timeval next_timeout;
171 struct timeval socket_timeout;
174 # ifndef OPENSSL_NO_SCTP
175 typedef struct bio_dgram_sctp_save_message_st {
179 } bio_dgram_sctp_save_message;
181 typedef struct bio_dgram_sctp_data_st {
184 struct sockaddr_in sa_in;
185 # if OPENSSL_USE_IPV6
186 struct sockaddr_in6 sa_in6;
189 unsigned int connected;
192 struct bio_dgram_sctp_sndinfo sndinfo;
193 struct bio_dgram_sctp_rcvinfo rcvinfo;
194 struct bio_dgram_sctp_prinfo prinfo;
195 void (*handle_notifications) (BIO *bio, void *context, void *buf);
196 void *notification_context;
201 int peer_auth_tested;
202 bio_dgram_sctp_save_message saved_message;
203 } bio_dgram_sctp_data;
206 BIO_METHOD *BIO_s_datagram(void)
208 return (&methods_dgramp);
211 BIO *BIO_new_dgram(int fd, int close_flag)
215 ret = BIO_new(BIO_s_datagram());
218 BIO_set_fd(ret, fd, close_flag);
222 static int dgram_new(BIO *bi)
224 bio_dgram_data *data = NULL;
228 data = OPENSSL_malloc(sizeof(*data));
231 memset(data, 0, sizeof(*data));
238 static int dgram_free(BIO *a)
240 bio_dgram_data *data;
247 data = (bio_dgram_data *)a->ptr;
253 static int dgram_clear(BIO *a)
267 static void dgram_adjust_rcv_timeout(BIO *b)
269 # if defined(SO_RCVTIMEO)
270 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
278 /* Is a timer active? */
279 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
280 struct timeval timenow, timeleft;
282 /* Read current socket timeout */
283 # ifdef OPENSSL_SYS_WINDOWS
286 sz.i = sizeof(timeout);
287 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
288 (void *)&timeout, &sz.i) < 0) {
289 perror("getsockopt");
291 data->socket_timeout.tv_sec = timeout / 1000;
292 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
295 sz.i = sizeof(data->socket_timeout);
296 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
297 &(data->socket_timeout), (void *)&sz) < 0) {
298 perror("getsockopt");
299 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0)
300 OPENSSL_assert(sz.s <= sizeof(data->socket_timeout));
303 /* Get current time */
304 get_current_time(&timenow);
306 /* Calculate time left until timer expires */
307 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
308 timeleft.tv_sec -= timenow.tv_sec;
309 timeleft.tv_usec -= timenow.tv_usec;
310 if (timeleft.tv_usec < 0) {
312 timeleft.tv_usec += 1000000;
315 if (timeleft.tv_sec < 0) {
317 timeleft.tv_usec = 1;
321 * Adjust socket timeout if next handhake message timer will expire
324 if ((data->socket_timeout.tv_sec == 0
325 && data->socket_timeout.tv_usec == 0)
326 || (data->socket_timeout.tv_sec > timeleft.tv_sec)
327 || (data->socket_timeout.tv_sec == timeleft.tv_sec
328 && data->socket_timeout.tv_usec >= timeleft.tv_usec)) {
329 # ifdef OPENSSL_SYS_WINDOWS
330 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
331 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
332 (void *)&timeout, sizeof(timeout)) < 0) {
333 perror("setsockopt");
336 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
337 sizeof(struct timeval)) < 0) {
338 perror("setsockopt");
346 static void dgram_reset_rcv_timeout(BIO *b)
348 # if defined(SO_RCVTIMEO)
349 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
351 /* Is a timer active? */
352 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
353 # ifdef OPENSSL_SYS_WINDOWS
354 int timeout = data->socket_timeout.tv_sec * 1000 +
355 data->socket_timeout.tv_usec / 1000;
356 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
357 (void *)&timeout, sizeof(timeout)) < 0) {
358 perror("setsockopt");
362 (b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
363 sizeof(struct timeval)) < 0) {
364 perror("setsockopt");
371 static int dgram_read(BIO *b, char *out, int outl)
374 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
378 * See commentary in b_sock.c. <appro>
386 struct sockaddr_in sa_in;
387 # if OPENSSL_USE_IPV6
388 struct sockaddr_in6 sa_in6;
394 sa.len.i = sizeof(sa.peer);
397 clear_socket_error();
398 memset(&sa.peer, 0, sizeof(sa.peer));
399 dgram_adjust_rcv_timeout(b);
400 ret = recvfrom(b->num, out, outl, 0, &sa.peer.sa, (void *)&sa.len);
401 if (sizeof(sa.len.i) != sizeof(sa.len.s) && sa.len.i == 0) {
402 OPENSSL_assert(sa.len.s <= sizeof(sa.peer));
403 sa.len.i = (int)sa.len.s;
406 if (!data->connected && ret >= 0)
407 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
409 BIO_clear_retry_flags(b);
411 if (BIO_dgram_should_retry(ret)) {
412 BIO_set_retry_read(b);
413 data->_errno = get_last_socket_error();
417 dgram_reset_rcv_timeout(b);
422 static int dgram_write(BIO *b, const char *in, int inl)
425 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
426 clear_socket_error();
429 ret = writesocket(b->num, in, inl);
431 int peerlen = sizeof(data->peer);
433 if (data->peer.sa.sa_family == AF_INET)
434 peerlen = sizeof(data->peer.sa_in);
435 # if OPENSSL_USE_IPV6
436 else if (data->peer.sa.sa_family == AF_INET6)
437 peerlen = sizeof(data->peer.sa_in6);
439 # if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
440 ret = sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
442 ret = sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
446 BIO_clear_retry_flags(b);
448 if (BIO_dgram_should_retry(ret)) {
449 BIO_set_retry_write(b);
450 data->_errno = get_last_socket_error();
456 static long dgram_get_mtu_overhead(bio_dgram_data *data)
460 switch (data->peer.sa.sa_family) {
463 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
467 # if OPENSSL_USE_IPV6
469 # ifdef IN6_IS_ADDR_V4MAPPED
470 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
472 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
478 * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
484 /* We don't know. Go with the historical default */
491 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
495 struct sockaddr *to = NULL;
496 bio_dgram_data *data = NULL;
498 # if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
499 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
500 * modern enough to define socklen_t */
504 struct sockaddr_in s4;
505 # if OPENSSL_USE_IPV6
506 struct sockaddr_in6 s6;
511 data = (bio_dgram_data *)b->ptr;
516 case BIO_C_FILE_SEEK:
519 case BIO_C_FILE_TELL:
525 b->num = *((int *)ptr);
526 b->shutdown = (int)num;
538 case BIO_CTRL_GET_CLOSE:
541 case BIO_CTRL_SET_CLOSE:
542 b->shutdown = (int)num;
544 case BIO_CTRL_PENDING:
545 case BIO_CTRL_WPENDING:
552 case BIO_CTRL_DGRAM_CONNECT:
553 to = (struct sockaddr *)ptr;
554 switch (to->sa_family) {
556 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
558 # if OPENSSL_USE_IPV6
560 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
564 memcpy(&data->peer, to, sizeof(data->peer.sa));
568 /* (Linux)kernel sets DF bit on outgoing IP packets */
569 case BIO_CTRL_DGRAM_MTU_DISCOVER:
570 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
571 addr_len = (socklen_t) sizeof(addr);
572 memset(&addr, 0, sizeof(addr));
573 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
577 switch (addr.sa.sa_family) {
579 sockopt_val = IP_PMTUDISC_DO;
580 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
581 &sockopt_val, sizeof(sockopt_val))) < 0)
582 perror("setsockopt");
584 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
586 sockopt_val = IPV6_PMTUDISC_DO;
587 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
588 &sockopt_val, sizeof(sockopt_val))) < 0)
589 perror("setsockopt");
600 case BIO_CTRL_DGRAM_QUERY_MTU:
601 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
602 addr_len = (socklen_t) sizeof(addr);
603 memset(&addr, 0, sizeof(addr));
604 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
608 sockopt_len = sizeof(sockopt_val);
609 switch (addr.sa.sa_family) {
612 getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
613 &sockopt_len)) < 0 || sockopt_val < 0) {
617 * we assume that the transport protocol is UDP and no IP
620 data->mtu = sockopt_val - 8 - 20;
624 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
627 getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
628 (void *)&sockopt_val, &sockopt_len)) < 0
629 || sockopt_val < 0) {
633 * we assume that the transport protocol is UDP and no IPV6
636 data->mtu = sockopt_val - 8 - 40;
649 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
650 ret = -dgram_get_mtu_overhead(data);
651 switch (data->peer.sa.sa_family) {
655 # if OPENSSL_USE_IPV6
657 # ifdef IN6_IS_ADDR_V4MAPPED
658 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
670 case BIO_CTRL_DGRAM_GET_MTU:
672 case BIO_CTRL_DGRAM_SET_MTU:
676 case BIO_CTRL_DGRAM_SET_CONNECTED:
677 to = (struct sockaddr *)ptr;
681 switch (to->sa_family) {
683 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
685 # if OPENSSL_USE_IPV6
687 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
691 memcpy(&data->peer, to, sizeof(data->peer.sa));
696 memset(&data->peer, 0, sizeof(data->peer));
699 case BIO_CTRL_DGRAM_GET_PEER:
700 switch (data->peer.sa.sa_family) {
702 ret = sizeof(data->peer.sa_in);
704 # if OPENSSL_USE_IPV6
706 ret = sizeof(data->peer.sa_in6);
710 ret = sizeof(data->peer.sa);
713 if (num == 0 || num > ret)
715 memcpy(ptr, &data->peer, (ret = num));
717 case BIO_CTRL_DGRAM_SET_PEER:
718 to = (struct sockaddr *)ptr;
719 switch (to->sa_family) {
721 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
723 # if OPENSSL_USE_IPV6
725 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
729 memcpy(&data->peer, to, sizeof(data->peer.sa));
733 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
734 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
736 # if defined(SO_RCVTIMEO)
737 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
738 # ifdef OPENSSL_SYS_WINDOWS
740 struct timeval *tv = (struct timeval *)ptr;
741 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
742 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
743 (void *)&timeout, sizeof(timeout)) < 0) {
744 perror("setsockopt");
749 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
750 sizeof(struct timeval)) < 0) {
751 perror("setsockopt");
756 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
764 # ifdef OPENSSL_SYS_WINDOWS
766 struct timeval *tv = (struct timeval *)ptr;
768 sz.i = sizeof(timeout);
769 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
770 (void *)&timeout, &sz.i) < 0) {
771 perror("getsockopt");
774 tv->tv_sec = timeout / 1000;
775 tv->tv_usec = (timeout % 1000) * 1000;
779 sz.i = sizeof(struct timeval);
780 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
781 ptr, (void *)&sz) < 0) {
782 perror("getsockopt");
784 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
785 OPENSSL_assert(sz.s <= sizeof(struct timeval));
793 # if defined(SO_SNDTIMEO)
794 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
795 # ifdef OPENSSL_SYS_WINDOWS
797 struct timeval *tv = (struct timeval *)ptr;
798 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
799 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
800 (void *)&timeout, sizeof(timeout)) < 0) {
801 perror("setsockopt");
806 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
807 sizeof(struct timeval)) < 0) {
808 perror("setsockopt");
813 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
821 # ifdef OPENSSL_SYS_WINDOWS
823 struct timeval *tv = (struct timeval *)ptr;
825 sz.i = sizeof(timeout);
826 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
827 (void *)&timeout, &sz.i) < 0) {
828 perror("getsockopt");
831 tv->tv_sec = timeout / 1000;
832 tv->tv_usec = (timeout % 1000) * 1000;
836 sz.i = sizeof(struct timeval);
837 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
838 ptr, (void *)&sz) < 0) {
839 perror("getsockopt");
841 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
842 OPENSSL_assert(sz.s <= sizeof(struct timeval));
850 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
852 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
853 # ifdef OPENSSL_SYS_WINDOWS
854 if (data->_errno == WSAETIMEDOUT)
856 if (data->_errno == EAGAIN)
865 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
866 if (data->_errno == EMSGSIZE) {
873 case BIO_CTRL_DGRAM_SET_DONT_FRAG:
874 sockopt_val = num ? 1 : 0;
876 switch (data->peer.sa.sa_family) {
878 # if defined(IP_DONTFRAG)
879 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG,
880 &sockopt_val, sizeof(sockopt_val))) < 0) {
881 perror("setsockopt");
884 # elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTUDISCOVER)
885 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
886 (ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
887 &sockopt_val, sizeof(sockopt_val))) < 0) {
888 perror("setsockopt");
891 # elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT)
892 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT,
893 (const char *)&sockopt_val,
894 sizeof(sockopt_val))) < 0) {
895 perror("setsockopt");
902 # if OPENSSL_USE_IPV6
904 # if defined(IPV6_DONTFRAG)
905 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
906 (const void *)&sockopt_val,
907 sizeof(sockopt_val))) < 0) {
908 perror("setsockopt");
911 # elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER)
912 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
913 (ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
914 &sockopt_val, sizeof(sockopt_val))) < 0) {
915 perror("setsockopt");
928 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
929 ret = dgram_get_mtu_overhead(data);
938 static int dgram_puts(BIO *bp, const char *str)
943 ret = dgram_write(bp, str, n);
947 # ifndef OPENSSL_NO_SCTP
948 BIO_METHOD *BIO_s_datagram_sctp(void)
950 return (&methods_dgramp_sctp);
953 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
956 int ret, optval = 20000;
957 int auth_data = 0, auth_forward = 0;
959 struct sctp_authchunk auth;
960 struct sctp_authchunks *authchunks;
961 socklen_t sockopt_len;
962 # ifdef SCTP_AUTHENTICATION_EVENT
964 struct sctp_event event;
966 struct sctp_event_subscribe event;
970 bio = BIO_new(BIO_s_datagram_sctp());
973 BIO_set_fd(bio, fd, close_flag);
975 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
976 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
978 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
979 sizeof(struct sctp_authchunk));
984 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
986 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
987 sizeof(struct sctp_authchunk));
994 * Test if activation was successful. When using accept(), SCTP-AUTH has
995 * to be activated for the listening socket already, otherwise the
996 * connected socket won't use it.
998 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
999 authchunks = OPENSSL_malloc(sockopt_len);
1004 memset(authchunks, 0, sockopt_len);
1006 getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
1010 OPENSSL_free(authchunks);
1015 for (p = (unsigned char *)authchunks->gauth_chunks;
1016 p < (unsigned char *)authchunks + sockopt_len;
1017 p += sizeof(uint8_t)) {
1018 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1020 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1024 OPENSSL_free(authchunks);
1026 OPENSSL_assert(auth_data);
1027 OPENSSL_assert(auth_forward);
1029 # ifdef SCTP_AUTHENTICATION_EVENT
1031 memset(&event, 0, sizeof(event));
1032 event.se_assoc_id = 0;
1033 event.se_type = SCTP_AUTHENTICATION_EVENT;
1036 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
1037 sizeof(struct sctp_event));
1043 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
1044 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
1050 event.sctp_authentication_event = 1;
1053 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
1054 sizeof(struct sctp_event_subscribe));
1063 * Disable partial delivery by setting the min size larger than the max
1064 * record size of 2^14 + 2048 + 13
1067 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
1077 int BIO_dgram_is_sctp(BIO *bio)
1079 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
1082 static int dgram_sctp_new(BIO *bi)
1084 bio_dgram_sctp_data *data = NULL;
1088 data = OPENSSL_malloc(sizeof(*data));
1091 memset(data, 0, sizeof(*data));
1092 # ifdef SCTP_PR_SCTP_NONE
1093 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1101 static int dgram_sctp_free(BIO *a)
1103 bio_dgram_sctp_data *data;
1107 if (!dgram_clear(a))
1110 data = (bio_dgram_sctp_data *) a->ptr;
1112 OPENSSL_free(data->saved_message.data);
1119 # ifdef SCTP_AUTHENTICATION_EVENT
1120 void dgram_sctp_handle_auth_free_key_event(BIO *b,
1121 union sctp_notification *snp)
1124 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
1126 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
1127 struct sctp_authkeyid authkeyid;
1130 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1131 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1132 &authkeyid, sizeof(struct sctp_authkeyid));
1137 static int dgram_sctp_read(BIO *b, char *out, int outl)
1139 int ret = 0, n = 0, i, optval;
1141 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1142 union sctp_notification *snp;
1145 struct cmsghdr *cmsg;
1149 clear_socket_error();
1152 memset(&data->rcvinfo, 0, sizeof(data->rcvinfo));
1155 msg.msg_name = NULL;
1156 msg.msg_namelen = 0;
1159 msg.msg_control = cmsgbuf;
1160 msg.msg_controllen = 512;
1162 n = recvmsg(b->num, &msg, 0);
1170 if (msg.msg_controllen > 0) {
1171 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1172 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1173 if (cmsg->cmsg_level != IPPROTO_SCTP)
1175 # ifdef SCTP_RCVINFO
1176 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1177 struct sctp_rcvinfo *rcvinfo;
1179 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1180 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1181 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1182 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1183 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1184 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1185 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1186 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1190 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1191 struct sctp_sndrcvinfo *sndrcvinfo;
1194 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1195 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1196 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1197 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1198 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1199 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1200 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1201 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1207 if (msg.msg_flags & MSG_NOTIFICATION) {
1208 snp = (union sctp_notification *)out;
1209 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1211 struct sctp_event event;
1213 struct sctp_event_subscribe event;
1214 socklen_t eventsize;
1217 * If a message has been delayed until the socket is dry,
1218 * it can be sent now.
1220 if (data->saved_message.length > 0) {
1221 dgram_sctp_write(data->saved_message.bio,
1222 data->saved_message.data,
1223 data->saved_message.length);
1224 OPENSSL_free(data->saved_message.data);
1225 data->saved_message.data = NULL;
1226 data->saved_message.length = 0;
1229 /* disable sender dry event */
1231 memset(&event, 0, sizeof(event));
1232 event.se_assoc_id = 0;
1233 event.se_type = SCTP_SENDER_DRY_EVENT;
1235 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1236 sizeof(struct sctp_event));
1242 eventsize = sizeof(struct sctp_event_subscribe);
1243 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1250 event.sctp_sender_dry_event = 0;
1252 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1253 sizeof(struct sctp_event_subscribe));
1260 # ifdef SCTP_AUTHENTICATION_EVENT
1261 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1262 dgram_sctp_handle_auth_free_key_event(b, snp);
1265 if (data->handle_notifications != NULL)
1266 data->handle_notifications(b, data->notification_context,
1269 memset(out, 0, outl);
1273 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1276 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1277 /* Partial message read, this should never happen! */
1280 * The buffer was too small, this means the peer sent a message
1281 * that was larger than allowed.
1287 * Test if socket buffer can handle max record size (2^14 + 2048
1290 optlen = (socklen_t) sizeof(int);
1291 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1293 OPENSSL_assert(optval >= 18445);
1296 * Test if SCTP doesn't partially deliver below max record size
1297 * (2^14 + 2048 + 13)
1299 optlen = (socklen_t) sizeof(int);
1301 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1304 OPENSSL_assert(optval >= 18445);
1307 * Partially delivered notification??? Probably a bug....
1309 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1312 * Everything seems ok till now, so it's most likely a message
1313 * dropped by PR-SCTP.
1315 memset(out, 0, outl);
1316 BIO_set_retry_read(b);
1320 BIO_clear_retry_flags(b);
1322 if (BIO_dgram_should_retry(ret)) {
1323 BIO_set_retry_read(b);
1324 data->_errno = get_last_socket_error();
1328 /* Test if peer uses SCTP-AUTH before continuing */
1329 if (!data->peer_auth_tested) {
1330 int ii, auth_data = 0, auth_forward = 0;
1332 struct sctp_authchunks *authchunks;
1335 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1336 authchunks = OPENSSL_malloc(optlen);
1338 BIOerr(BIO_F_DGRAM_SCTP_READ, ERR_R_MALLOC_FAILURE);
1341 memset(authchunks, 0, optlen);
1342 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1343 authchunks, &optlen);
1346 for (p = (unsigned char *)authchunks->gauth_chunks;
1347 p < (unsigned char *)authchunks + optlen;
1348 p += sizeof(uint8_t)) {
1349 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1351 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1355 OPENSSL_free(authchunks);
1357 if (!auth_data || !auth_forward) {
1358 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1362 data->peer_auth_tested = 1;
1368 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1371 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1372 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1373 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1374 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1375 struct iovec iov[1];
1377 struct cmsghdr *cmsg;
1378 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1379 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1380 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1381 struct sctp_sndinfo *sndinfo;
1382 struct sctp_prinfo *prinfo;
1384 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1385 struct sctp_sndrcvinfo *sndrcvinfo;
1388 clear_socket_error();
1391 * If we're send anything else than application data, disable all user
1392 * parameters and flags.
1395 memset(&handshake_sinfo, 0, sizeof(handshake_sinfo));
1396 # ifdef SCTP_SACK_IMMEDIATELY
1397 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1399 sinfo = &handshake_sinfo;
1403 * If we have to send a shutdown alert message and the socket is not dry
1404 * yet, we have to save it and send it as soon as the socket gets dry.
1406 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b)) {
1408 data->saved_message.bio = b;
1409 if (!(tmp = OPENSSL_malloc(inl))) {
1410 BIOerr(BIO_F_DGRAM_SCTP_WRITE, ERR_R_MALLOC_FAILURE);
1413 OPENSSL_free(data->saved_message.data);
1414 data->saved_message.data = tmp;
1415 memcpy(data->saved_message.data, in, inl);
1416 data->saved_message.length = inl;
1420 iov[0].iov_base = (char *)in;
1421 iov[0].iov_len = inl;
1422 msg.msg_name = NULL;
1423 msg.msg_namelen = 0;
1426 msg.msg_control = (caddr_t) cmsgbuf;
1427 msg.msg_controllen = 0;
1429 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1430 cmsg = (struct cmsghdr *)cmsgbuf;
1431 cmsg->cmsg_level = IPPROTO_SCTP;
1432 cmsg->cmsg_type = SCTP_SNDINFO;
1433 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1434 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1435 memset(sndinfo, 0, sizeof(*sndinfo));
1436 sndinfo->snd_sid = sinfo->snd_sid;
1437 sndinfo->snd_flags = sinfo->snd_flags;
1438 sndinfo->snd_ppid = sinfo->snd_ppid;
1439 sndinfo->snd_context = sinfo->snd_context;
1440 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1443 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1444 cmsg->cmsg_level = IPPROTO_SCTP;
1445 cmsg->cmsg_type = SCTP_PRINFO;
1446 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1447 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1448 memset(prinfo, 0, sizeof(*prinfo));
1449 prinfo->pr_policy = pinfo->pr_policy;
1450 prinfo->pr_value = pinfo->pr_value;
1451 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1453 cmsg = (struct cmsghdr *)cmsgbuf;
1454 cmsg->cmsg_level = IPPROTO_SCTP;
1455 cmsg->cmsg_type = SCTP_SNDRCV;
1456 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1457 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1458 memset(sndrcvinfo, 0, sizeof(*sndrcvinfo));
1459 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1460 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1462 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1464 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1465 sndrcvinfo->sinfo_context = sinfo->snd_context;
1466 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1467 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1470 ret = sendmsg(b->num, &msg, 0);
1472 BIO_clear_retry_flags(b);
1474 if (BIO_dgram_should_retry(ret)) {
1475 BIO_set_retry_write(b);
1476 data->_errno = get_last_socket_error();
1482 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1485 bio_dgram_sctp_data *data = NULL;
1486 socklen_t sockopt_len = 0;
1487 struct sctp_authkeyid authkeyid;
1488 struct sctp_authkey *authkey = NULL;
1490 data = (bio_dgram_sctp_data *) b->ptr;
1493 case BIO_CTRL_DGRAM_QUERY_MTU:
1495 * Set to maximum (2^14) and ignore user input to enable transport
1496 * protocol fragmentation. Returns always 2^14.
1501 case BIO_CTRL_DGRAM_SET_MTU:
1503 * Set to maximum (2^14) and ignore input to enable transport
1504 * protocol fragmentation. Returns always 2^14.
1509 case BIO_CTRL_DGRAM_SET_CONNECTED:
1510 case BIO_CTRL_DGRAM_CONNECT:
1511 /* Returns always -1. */
1514 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1516 * SCTP doesn't need the DTLS timer Returns always 1.
1519 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1521 * We allow transport protocol fragmentation so this is irrelevant
1525 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1527 data->in_handshake = 1;
1529 data->in_handshake = 0;
1532 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1533 &data->in_handshake, sizeof(int));
1535 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1537 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1540 /* Get active key */
1541 sockopt_len = sizeof(struct sctp_authkeyid);
1543 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1549 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1550 authkey = OPENSSL_malloc(sockopt_len);
1551 if (authkey == NULL) {
1555 memset(authkey, 0, sockopt_len);
1556 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1557 # ifndef __FreeBSD__
1559 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1560 * and higher work without it.
1562 authkey->sca_keylength = 64;
1564 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1567 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1569 OPENSSL_free(authkey);
1574 /* Reset active key */
1575 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1576 &authkeyid, sizeof(struct sctp_authkeyid));
1581 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1582 /* Returns 0 on success, -1 otherwise. */
1584 /* Get active key */
1585 sockopt_len = sizeof(struct sctp_authkeyid);
1587 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1592 /* Set active key */
1593 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1594 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1595 &authkeyid, sizeof(struct sctp_authkeyid));
1600 * CCS has been sent, so remember that and fall through to check if
1601 * we need to deactivate an old key
1605 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1606 /* Returns 0 on success, -1 otherwise. */
1609 * Has this command really been called or is this just a
1612 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1616 * CSS has been both, received and sent, so deactivate an old key
1618 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1619 /* Get active key */
1620 sockopt_len = sizeof(struct sctp_authkeyid);
1622 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1623 &authkeyid, &sockopt_len);
1628 * Deactivate key or delete second last key if
1629 * SCTP_AUTHENTICATION_EVENT is not available.
1631 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1632 # ifdef SCTP_AUTH_DEACTIVATE_KEY
1633 sockopt_len = sizeof(struct sctp_authkeyid);
1634 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1635 &authkeyid, sockopt_len);
1639 # ifndef SCTP_AUTHENTICATION_EVENT
1640 if (authkeyid.scact_keynumber > 0) {
1641 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1642 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1643 &authkeyid, sizeof(struct sctp_authkeyid));
1653 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1654 /* Returns the size of the copied struct. */
1655 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1656 num = sizeof(struct bio_dgram_sctp_sndinfo);
1658 memcpy(ptr, &(data->sndinfo), num);
1661 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1662 /* Returns the size of the copied struct. */
1663 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1664 num = sizeof(struct bio_dgram_sctp_sndinfo);
1666 memcpy(&(data->sndinfo), ptr, num);
1668 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1669 /* Returns the size of the copied struct. */
1670 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1671 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1673 memcpy(ptr, &data->rcvinfo, num);
1677 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1678 /* Returns the size of the copied struct. */
1679 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1680 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1682 memcpy(&(data->rcvinfo), ptr, num);
1684 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1685 /* Returns the size of the copied struct. */
1686 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1687 num = sizeof(struct bio_dgram_sctp_prinfo);
1689 memcpy(ptr, &(data->prinfo), num);
1692 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1693 /* Returns the size of the copied struct. */
1694 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1695 num = sizeof(struct bio_dgram_sctp_prinfo);
1697 memcpy(&(data->prinfo), ptr, num);
1699 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1700 /* Returns always 1. */
1702 data->save_shutdown = 1;
1704 data->save_shutdown = 0;
1709 * Pass to default ctrl function to process SCTP unspecific commands
1711 ret = dgram_ctrl(b, cmd, num, ptr);
1717 int BIO_dgram_sctp_notification_cb(BIO *b,
1718 void (*handle_notifications) (BIO *bio,
1724 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1726 if (handle_notifications != NULL) {
1727 data->handle_notifications = handle_notifications;
1728 data->notification_context = context;
1735 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1738 int n, sockflags, ret;
1739 union sctp_notification snp;
1743 struct sctp_event event;
1745 struct sctp_event_subscribe event;
1746 socklen_t eventsize;
1748 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1750 /* set sender dry event */
1752 memset(&event, 0, sizeof(event));
1753 event.se_assoc_id = 0;
1754 event.se_type = SCTP_SENDER_DRY_EVENT;
1757 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1758 sizeof(struct sctp_event));
1760 eventsize = sizeof(struct sctp_event_subscribe);
1761 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1765 event.sctp_sender_dry_event = 1;
1768 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1769 sizeof(struct sctp_event_subscribe));
1774 /* peek for notification */
1775 memset(&snp, 0, sizeof(snp));
1776 iov.iov_base = (char *)&snp;
1777 iov.iov_len = sizeof(union sctp_notification);
1778 msg.msg_name = NULL;
1779 msg.msg_namelen = 0;
1782 msg.msg_control = NULL;
1783 msg.msg_controllen = 0;
1786 n = recvmsg(b->num, &msg, MSG_PEEK);
1788 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1789 && (get_last_socket_error() != EWOULDBLOCK))
1795 /* if we find a notification, process it and try again if necessary */
1796 while (msg.msg_flags & MSG_NOTIFICATION) {
1797 memset(&snp, 0, sizeof(snp));
1798 iov.iov_base = (char *)&snp;
1799 iov.iov_len = sizeof(union sctp_notification);
1800 msg.msg_name = NULL;
1801 msg.msg_namelen = 0;
1804 msg.msg_control = NULL;
1805 msg.msg_controllen = 0;
1808 n = recvmsg(b->num, &msg, 0);
1810 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1811 && (get_last_socket_error() != EWOULDBLOCK))
1817 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1820 /* disable sender dry event */
1822 memset(&event, 0, sizeof(event));
1823 event.se_assoc_id = 0;
1824 event.se_type = SCTP_SENDER_DRY_EVENT;
1827 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1828 sizeof(struct sctp_event));
1830 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1832 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1837 event.sctp_sender_dry_event = 0;
1840 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1841 sizeof(struct sctp_event_subscribe));
1846 # ifdef SCTP_AUTHENTICATION_EVENT
1847 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1848 dgram_sctp_handle_auth_free_key_event(b, &snp);
1851 if (data->handle_notifications != NULL)
1852 data->handle_notifications(b, data->notification_context,
1855 /* found notification, peek again */
1856 memset(&snp, 0, sizeof(snp));
1857 iov.iov_base = (char *)&snp;
1858 iov.iov_len = sizeof(union sctp_notification);
1859 msg.msg_name = NULL;
1860 msg.msg_namelen = 0;
1863 msg.msg_control = NULL;
1864 msg.msg_controllen = 0;
1867 /* if we have seen the dry already, don't wait */
1869 sockflags = fcntl(b->num, F_GETFL, 0);
1870 fcntl(b->num, F_SETFL, O_NONBLOCK);
1873 n = recvmsg(b->num, &msg, MSG_PEEK);
1876 fcntl(b->num, F_SETFL, sockflags);
1880 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1881 && (get_last_socket_error() != EWOULDBLOCK))
1888 /* read anything else */
1892 int BIO_dgram_sctp_msg_waiting(BIO *b)
1895 union sctp_notification snp;
1898 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1900 /* Check if there are any messages waiting to be read */
1902 memset(&snp, 0, sizeof(snp));
1903 iov.iov_base = (char *)&snp;
1904 iov.iov_len = sizeof(union sctp_notification);
1905 msg.msg_name = NULL;
1906 msg.msg_namelen = 0;
1909 msg.msg_control = NULL;
1910 msg.msg_controllen = 0;
1913 sockflags = fcntl(b->num, F_GETFL, 0);
1914 fcntl(b->num, F_SETFL, O_NONBLOCK);
1915 n = recvmsg(b->num, &msg, MSG_PEEK);
1916 fcntl(b->num, F_SETFL, sockflags);
1918 /* if notification, process and try again */
1919 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1920 # ifdef SCTP_AUTHENTICATION_EVENT
1921 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1922 dgram_sctp_handle_auth_free_key_event(b, &snp);
1925 memset(&snp, 0, sizeof(snp));
1926 iov.iov_base = (char *)&snp;
1927 iov.iov_len = sizeof(union sctp_notification);
1928 msg.msg_name = NULL;
1929 msg.msg_namelen = 0;
1932 msg.msg_control = NULL;
1933 msg.msg_controllen = 0;
1935 n = recvmsg(b->num, &msg, 0);
1937 if (data->handle_notifications != NULL)
1938 data->handle_notifications(b, data->notification_context,
1942 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1944 /* Return 1 if there is a message to be read, return 0 otherwise. */
1951 static int dgram_sctp_puts(BIO *bp, const char *str)
1956 ret = dgram_sctp_write(bp, str, n);
1961 static int BIO_dgram_should_retry(int i)
1965 if ((i == 0) || (i == -1)) {
1966 err = get_last_socket_error();
1968 # if defined(OPENSSL_SYS_WINDOWS)
1970 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1971 * this point, the error code was overwritten by another system call
1972 * before this error handling is called.
1976 return (BIO_dgram_non_fatal_error(err));
1981 int BIO_dgram_non_fatal_error(int err)
1984 # if defined(OPENSSL_SYS_WINDOWS)
1985 # if defined(WSAEWOULDBLOCK)
1986 case WSAEWOULDBLOCK:
1991 # ifdef WSAEWOULDBLOCK
1992 # if WSAEWOULDBLOCK != EWOULDBLOCK
2005 # if EWOULDBLOCK != EAGAIN
2030 static void get_current_time(struct timeval *t)
2032 # if defined(_WIN32)
2035 unsigned __int64 ul;
2040 SystemTimeToFileTime(&st, &now.ft);
2042 now.ul -= 116444736000000000ULL;
2044 now.ul -= 116444736000000000UI64; /* re-bias to 1/1/1970 */
2046 t->tv_sec = (long)(now.ul / 10000000);
2047 t->tv_usec = ((int)(now.ul % 10000000)) / 10;
2048 # elif defined(OPENSSL_SYS_VMS)
2051 t->tv_sec = (long)tb.time;
2052 t->tv_usec = (long)tb.millitm * 1000;
2054 gettimeofday(t, NULL);