1 /* crypto/bio/bio_dgram.c */
3 * DTLS implementation written by Nagendra Modadugu
4 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
6 /* ====================================================================
7 * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * openssl-core@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
65 #include <openssl/bio.h>
66 #ifndef OPENSSL_NO_DGRAM
68 # if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS)
69 # include <sys/timeb.h>
72 # ifndef OPENSSL_NO_SCTP
73 # include <netinet/sctp.h>
75 # define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
76 # define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
79 # if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
80 # define IP_MTU 14 /* linux is lame */
83 # if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
84 /* Standard definition causes type-punning problems. */
85 # undef IN6_IS_ADDR_V4MAPPED
86 # define s6_addr32 __u6_addr.__u6_addr32
87 # define IN6_IS_ADDR_V4MAPPED(a) \
88 (((a)->s6_addr32[0] == 0) && \
89 ((a)->s6_addr32[1] == 0) && \
90 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
94 # define sock_write SockWrite /* Watt-32 uses same names */
95 # define sock_read SockRead
96 # define sock_puts SockPuts
99 static int dgram_write(BIO *h, const char *buf, int num);
100 static int dgram_read(BIO *h, char *buf, int size);
101 static int dgram_puts(BIO *h, const char *str);
102 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
103 static int dgram_new(BIO *h);
104 static int dgram_free(BIO *data);
105 static int dgram_clear(BIO *bio);
107 # ifndef OPENSSL_NO_SCTP
108 static int dgram_sctp_write(BIO *h, const char *buf, int num);
109 static int dgram_sctp_read(BIO *h, char *buf, int size);
110 static int dgram_sctp_puts(BIO *h, const char *str);
111 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
112 static int dgram_sctp_new(BIO *h);
113 static int dgram_sctp_free(BIO *data);
114 # ifdef SCTP_AUTHENTICATION_EVENT
115 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification
120 static int BIO_dgram_should_retry(int s);
122 static void get_current_time(struct timeval *t);
124 static BIO_METHOD methods_dgramp = {
130 NULL, /* dgram_gets, */
137 # ifndef OPENSSL_NO_SCTP
138 static BIO_METHOD methods_dgramp_sctp = {
140 "datagram sctp socket",
144 NULL, /* dgram_gets, */
152 typedef struct bio_dgram_data_st {
155 struct sockaddr_in sa_in;
156 # if OPENSSL_USE_IPV6
157 struct sockaddr_in6 sa_in6;
160 unsigned int connected;
163 struct timeval next_timeout;
164 struct timeval socket_timeout;
167 # ifndef OPENSSL_NO_SCTP
168 typedef struct bio_dgram_sctp_save_message_st {
172 } bio_dgram_sctp_save_message;
174 typedef struct bio_dgram_sctp_data_st {
177 struct sockaddr_in sa_in;
178 # if OPENSSL_USE_IPV6
179 struct sockaddr_in6 sa_in6;
182 unsigned int connected;
185 struct bio_dgram_sctp_sndinfo sndinfo;
186 struct bio_dgram_sctp_rcvinfo rcvinfo;
187 struct bio_dgram_sctp_prinfo prinfo;
188 void (*handle_notifications) (BIO *bio, void *context, void *buf);
189 void *notification_context;
194 int peer_auth_tested;
195 bio_dgram_sctp_save_message saved_message;
196 } bio_dgram_sctp_data;
199 BIO_METHOD *BIO_s_datagram(void)
201 return (&methods_dgramp);
204 BIO *BIO_new_dgram(int fd, int close_flag)
208 ret = BIO_new(BIO_s_datagram());
211 BIO_set_fd(ret, fd, close_flag);
215 static int dgram_new(BIO *bi)
217 bio_dgram_data *data = NULL;
221 data = OPENSSL_malloc(sizeof(bio_dgram_data));
224 memset(data, 0x00, sizeof(bio_dgram_data));
231 static int dgram_free(BIO *a)
233 bio_dgram_data *data;
240 data = (bio_dgram_data *)a->ptr;
247 static int dgram_clear(BIO *a)
261 static void dgram_adjust_rcv_timeout(BIO *b)
263 # if defined(SO_RCVTIMEO)
264 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
272 /* Is a timer active? */
273 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
274 struct timeval timenow, timeleft;
276 /* Read current socket timeout */
277 # ifdef OPENSSL_SYS_WINDOWS
280 sz.i = sizeof(timeout);
281 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
282 (void *)&timeout, &sz.i) < 0) {
283 perror("getsockopt");
285 data->socket_timeout.tv_sec = timeout / 1000;
286 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
289 sz.i = sizeof(data->socket_timeout);
290 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
291 &(data->socket_timeout), (void *)&sz) < 0) {
292 perror("getsockopt");
293 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0)
294 OPENSSL_assert(sz.s <= sizeof(data->socket_timeout));
297 /* Get current time */
298 get_current_time(&timenow);
300 /* Calculate time left until timer expires */
301 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
302 if (timeleft.tv_usec < timenow.tv_usec) {
303 timeleft.tv_usec = 1000000 - timenow.tv_usec + timeleft.tv_usec;
306 timeleft.tv_usec -= timenow.tv_usec;
308 if (timeleft.tv_sec < timenow.tv_sec) {
310 timeleft.tv_usec = 1;
312 timeleft.tv_sec -= timenow.tv_sec;
316 * Adjust socket timeout if next handhake message timer will expire
319 if ((data->socket_timeout.tv_sec == 0
320 && data->socket_timeout.tv_usec == 0)
321 || (data->socket_timeout.tv_sec > timeleft.tv_sec)
322 || (data->socket_timeout.tv_sec == timeleft.tv_sec
323 && data->socket_timeout.tv_usec >= timeleft.tv_usec)) {
324 # ifdef OPENSSL_SYS_WINDOWS
325 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
326 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
327 (void *)&timeout, sizeof(timeout)) < 0) {
328 perror("setsockopt");
331 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
332 sizeof(struct timeval)) < 0) {
333 perror("setsockopt");
341 static void dgram_reset_rcv_timeout(BIO *b)
343 # if defined(SO_RCVTIMEO)
344 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
346 /* Is a timer active? */
347 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
348 # ifdef OPENSSL_SYS_WINDOWS
349 int timeout = data->socket_timeout.tv_sec * 1000 +
350 data->socket_timeout.tv_usec / 1000;
351 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
352 (void *)&timeout, sizeof(timeout)) < 0) {
353 perror("setsockopt");
357 (b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
358 sizeof(struct timeval)) < 0) {
359 perror("setsockopt");
366 static int dgram_read(BIO *b, char *out, int outl)
369 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
373 * See commentary in b_sock.c. <appro>
381 struct sockaddr_in sa_in;
382 # if OPENSSL_USE_IPV6
383 struct sockaddr_in6 sa_in6;
389 sa.len.i = sizeof(sa.peer);
392 clear_socket_error();
393 memset(&sa.peer, 0x00, sizeof(sa.peer));
394 dgram_adjust_rcv_timeout(b);
395 ret = recvfrom(b->num, out, outl, 0, &sa.peer.sa, (void *)&sa.len);
396 if (sizeof(sa.len.i) != sizeof(sa.len.s) && sa.len.i == 0) {
397 OPENSSL_assert(sa.len.s <= sizeof(sa.peer));
398 sa.len.i = (int)sa.len.s;
401 if (!data->connected && ret >= 0)
402 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
404 BIO_clear_retry_flags(b);
406 if (BIO_dgram_should_retry(ret)) {
407 BIO_set_retry_read(b);
408 data->_errno = get_last_socket_error();
412 dgram_reset_rcv_timeout(b);
417 static int dgram_write(BIO *b, const char *in, int inl)
420 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
421 clear_socket_error();
424 ret = writesocket(b->num, in, inl);
426 int peerlen = sizeof(data->peer);
428 if (data->peer.sa.sa_family == AF_INET)
429 peerlen = sizeof(data->peer.sa_in);
430 # if OPENSSL_USE_IPV6
431 else if (data->peer.sa.sa_family == AF_INET6)
432 peerlen = sizeof(data->peer.sa_in6);
434 # if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
435 ret = sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
437 ret = sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
441 BIO_clear_retry_flags(b);
443 if (BIO_dgram_should_retry(ret)) {
444 BIO_set_retry_write(b);
445 data->_errno = get_last_socket_error();
447 # if 0 /* higher layers are responsible for querying
448 * MTU, if necessary */
449 if (data->_errno == EMSGSIZE)
450 /* retrieve the new MTU */
451 BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
458 static long dgram_get_mtu_overhead(bio_dgram_data *data)
462 switch (data->peer.sa.sa_family) {
465 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
469 # if OPENSSL_USE_IPV6
471 # ifdef IN6_IS_ADDR_V4MAPPED
472 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
474 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
480 * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
486 /* We don't know. Go with the historical default */
493 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
497 struct sockaddr *to = NULL;
498 bio_dgram_data *data = NULL;
499 # if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
501 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
502 * modern enough to define socklen_t */
506 struct sockaddr_in s4;
507 # if OPENSSL_USE_IPV6
508 struct sockaddr_in6 s6;
513 data = (bio_dgram_data *)b->ptr;
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;
555 if (connect(b->num, to, sizeof(struct sockaddr)) < 0) {
560 switch (to->sa_family) {
562 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
564 # if OPENSSL_USE_IPV6
566 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
570 memcpy(&data->peer, to, sizeof(data->peer.sa));
577 /* (Linux)kernel sets DF bit on outgoing IP packets */
578 case BIO_CTRL_DGRAM_MTU_DISCOVER:
579 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
580 addr_len = (socklen_t) sizeof(addr);
581 memset((void *)&addr, 0, sizeof(addr));
582 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
586 switch (addr.sa.sa_family) {
588 sockopt_val = IP_PMTUDISC_DO;
589 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
590 &sockopt_val, sizeof(sockopt_val))) < 0)
591 perror("setsockopt");
593 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
595 sockopt_val = IPV6_PMTUDISC_DO;
596 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
597 &sockopt_val, sizeof(sockopt_val))) < 0)
598 perror("setsockopt");
609 case BIO_CTRL_DGRAM_QUERY_MTU:
610 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
611 addr_len = (socklen_t) sizeof(addr);
612 memset((void *)&addr, 0, sizeof(addr));
613 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
617 sockopt_len = sizeof(sockopt_val);
618 switch (addr.sa.sa_family) {
621 getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
622 &sockopt_len)) < 0 || sockopt_val < 0) {
626 * we assume that the transport protocol is UDP and no IP
629 data->mtu = sockopt_val - 8 - 20;
633 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
636 getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
637 (void *)&sockopt_val, &sockopt_len)) < 0
638 || sockopt_val < 0) {
642 * we assume that the transport protocol is UDP and no IPV6
645 data->mtu = sockopt_val - 8 - 40;
658 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
659 ret = -dgram_get_mtu_overhead(data);
660 switch (data->peer.sa.sa_family) {
664 # if OPENSSL_USE_IPV6
666 # ifdef IN6_IS_ADDR_V4MAPPED
667 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
679 case BIO_CTRL_DGRAM_GET_MTU:
682 case BIO_CTRL_DGRAM_SET_MTU:
686 case BIO_CTRL_DGRAM_SET_CONNECTED:
687 to = (struct sockaddr *)ptr;
691 switch (to->sa_family) {
693 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
695 # if OPENSSL_USE_IPV6
697 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
701 memcpy(&data->peer, to, sizeof(data->peer.sa));
706 memset(&(data->peer), 0x00, sizeof(data->peer));
709 case BIO_CTRL_DGRAM_GET_PEER:
710 switch (data->peer.sa.sa_family) {
712 ret = sizeof(data->peer.sa_in);
714 # if OPENSSL_USE_IPV6
716 ret = sizeof(data->peer.sa_in6);
720 ret = sizeof(data->peer.sa);
723 if (num == 0 || num > ret)
725 memcpy(ptr, &data->peer, (ret = num));
727 case BIO_CTRL_DGRAM_SET_PEER:
728 to = (struct sockaddr *)ptr;
729 switch (to->sa_family) {
731 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
733 # if OPENSSL_USE_IPV6
735 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
739 memcpy(&data->peer, to, sizeof(data->peer.sa));
743 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
744 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
746 # if defined(SO_RCVTIMEO)
747 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
748 # ifdef OPENSSL_SYS_WINDOWS
750 struct timeval *tv = (struct timeval *)ptr;
751 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
752 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
753 (void *)&timeout, sizeof(timeout)) < 0) {
754 perror("setsockopt");
759 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
760 sizeof(struct timeval)) < 0) {
761 perror("setsockopt");
766 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
774 # ifdef OPENSSL_SYS_WINDOWS
776 struct timeval *tv = (struct timeval *)ptr;
778 sz.i = sizeof(timeout);
779 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
780 (void *)&timeout, &sz.i) < 0) {
781 perror("getsockopt");
784 tv->tv_sec = timeout / 1000;
785 tv->tv_usec = (timeout % 1000) * 1000;
789 sz.i = sizeof(struct timeval);
790 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
791 ptr, (void *)&sz) < 0) {
792 perror("getsockopt");
794 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
795 OPENSSL_assert(sz.s <= sizeof(struct timeval));
803 # if defined(SO_SNDTIMEO)
804 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
805 # ifdef OPENSSL_SYS_WINDOWS
807 struct timeval *tv = (struct timeval *)ptr;
808 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
809 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
810 (void *)&timeout, sizeof(timeout)) < 0) {
811 perror("setsockopt");
816 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
817 sizeof(struct timeval)) < 0) {
818 perror("setsockopt");
823 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
831 # ifdef OPENSSL_SYS_WINDOWS
833 struct timeval *tv = (struct timeval *)ptr;
835 sz.i = sizeof(timeout);
836 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
837 (void *)&timeout, &sz.i) < 0) {
838 perror("getsockopt");
841 tv->tv_sec = timeout / 1000;
842 tv->tv_usec = (timeout % 1000) * 1000;
846 sz.i = sizeof(struct timeval);
847 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
848 ptr, (void *)&sz) < 0) {
849 perror("getsockopt");
851 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
852 OPENSSL_assert(sz.s <= sizeof(struct timeval));
860 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
862 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
863 # ifdef OPENSSL_SYS_WINDOWS
864 if (data->_errno == WSAETIMEDOUT)
866 if (data->_errno == EAGAIN)
875 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
876 if (data->_errno == EMSGSIZE) {
883 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
884 ret = dgram_get_mtu_overhead(data);
893 static int dgram_puts(BIO *bp, const char *str)
898 ret = dgram_write(bp, str, n);
902 # ifndef OPENSSL_NO_SCTP
903 BIO_METHOD *BIO_s_datagram_sctp(void)
905 return (&methods_dgramp_sctp);
908 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
911 int ret, optval = 20000;
912 int auth_data = 0, auth_forward = 0;
914 struct sctp_authchunk auth;
915 struct sctp_authchunks *authchunks;
916 socklen_t sockopt_len;
917 # ifdef SCTP_AUTHENTICATION_EVENT
919 struct sctp_event event;
921 struct sctp_event_subscribe event;
925 bio = BIO_new(BIO_s_datagram_sctp());
928 BIO_set_fd(bio, fd, close_flag);
930 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
931 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
933 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
934 sizeof(struct sctp_authchunk));
939 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
941 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
942 sizeof(struct sctp_authchunk));
949 * Test if activation was successful. When using accept(), SCTP-AUTH has
950 * to be activated for the listening socket already, otherwise the
951 * connected socket won't use it.
953 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
954 authchunks = OPENSSL_malloc(sockopt_len);
959 memset(authchunks, 0, sizeof(sockopt_len));
961 getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
965 OPENSSL_free(authchunks);
970 for (p = (unsigned char *)authchunks->gauth_chunks;
971 p < (unsigned char *)authchunks + sockopt_len;
972 p += sizeof(uint8_t)) {
973 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
975 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
979 OPENSSL_free(authchunks);
981 OPENSSL_assert(auth_data);
982 OPENSSL_assert(auth_forward);
984 # ifdef SCTP_AUTHENTICATION_EVENT
986 memset(&event, 0, sizeof(struct sctp_event));
987 event.se_assoc_id = 0;
988 event.se_type = SCTP_AUTHENTICATION_EVENT;
991 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
992 sizeof(struct sctp_event));
998 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
999 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
1005 event.sctp_authentication_event = 1;
1008 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
1009 sizeof(struct sctp_event_subscribe));
1018 * Disable partial delivery by setting the min size larger than the max
1019 * record size of 2^14 + 2048 + 13
1022 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
1032 int BIO_dgram_is_sctp(BIO *bio)
1034 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
1037 static int dgram_sctp_new(BIO *bi)
1039 bio_dgram_sctp_data *data = NULL;
1043 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
1046 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
1047 # ifdef SCTP_PR_SCTP_NONE
1048 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1056 static int dgram_sctp_free(BIO *a)
1058 bio_dgram_sctp_data *data;
1062 if (!dgram_clear(a))
1065 data = (bio_dgram_sctp_data *) a->ptr;
1067 if (data->saved_message.data != NULL)
1068 OPENSSL_free(data->saved_message.data);
1075 # ifdef SCTP_AUTHENTICATION_EVENT
1076 void dgram_sctp_handle_auth_free_key_event(BIO *b,
1077 union sctp_notification *snp)
1080 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
1082 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
1083 struct sctp_authkeyid authkeyid;
1086 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1087 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1088 &authkeyid, sizeof(struct sctp_authkeyid));
1093 static int dgram_sctp_read(BIO *b, char *out, int outl)
1095 int ret = 0, n = 0, i, optval;
1097 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1098 union sctp_notification *snp;
1101 struct cmsghdr *cmsg;
1105 clear_socket_error();
1108 memset(&data->rcvinfo, 0x00,
1109 sizeof(struct bio_dgram_sctp_rcvinfo));
1112 msg.msg_name = NULL;
1113 msg.msg_namelen = 0;
1116 msg.msg_control = cmsgbuf;
1117 msg.msg_controllen = 512;
1119 n = recvmsg(b->num, &msg, 0);
1127 if (msg.msg_controllen > 0) {
1128 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1129 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1130 if (cmsg->cmsg_level != IPPROTO_SCTP)
1132 # ifdef SCTP_RCVINFO
1133 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1134 struct sctp_rcvinfo *rcvinfo;
1136 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1137 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1138 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1139 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1140 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1141 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1142 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1143 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1147 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1148 struct sctp_sndrcvinfo *sndrcvinfo;
1151 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1152 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1153 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1154 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1155 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1156 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1157 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1158 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1164 if (msg.msg_flags & MSG_NOTIFICATION) {
1165 snp = (union sctp_notification *)out;
1166 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1168 struct sctp_event event;
1170 struct sctp_event_subscribe event;
1171 socklen_t eventsize;
1174 * If a message has been delayed until the socket is dry,
1175 * it can be sent now.
1177 if (data->saved_message.length > 0) {
1178 dgram_sctp_write(data->saved_message.bio,
1179 data->saved_message.data,
1180 data->saved_message.length);
1181 OPENSSL_free(data->saved_message.data);
1182 data->saved_message.data = NULL;
1183 data->saved_message.length = 0;
1186 /* disable sender dry event */
1188 memset(&event, 0, sizeof(struct sctp_event));
1189 event.se_assoc_id = 0;
1190 event.se_type = SCTP_SENDER_DRY_EVENT;
1192 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1193 sizeof(struct sctp_event));
1199 eventsize = sizeof(struct sctp_event_subscribe);
1200 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1207 event.sctp_sender_dry_event = 0;
1209 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1210 sizeof(struct sctp_event_subscribe));
1217 # ifdef SCTP_AUTHENTICATION_EVENT
1218 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1219 dgram_sctp_handle_auth_free_key_event(b, snp);
1222 if (data->handle_notifications != NULL)
1223 data->handle_notifications(b, data->notification_context,
1226 memset(out, 0, outl);
1230 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1233 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1234 /* Partial message read, this should never happen! */
1237 * The buffer was too small, this means the peer sent a message
1238 * that was larger than allowed.
1244 * Test if socket buffer can handle max record size (2^14 + 2048
1247 optlen = (socklen_t) sizeof(int);
1248 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1250 OPENSSL_assert(optval >= 18445);
1253 * Test if SCTP doesn't partially deliver below max record size
1254 * (2^14 + 2048 + 13)
1256 optlen = (socklen_t) sizeof(int);
1258 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1261 OPENSSL_assert(optval >= 18445);
1264 * Partially delivered notification??? Probably a bug....
1266 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1269 * Everything seems ok till now, so it's most likely a message
1270 * dropped by PR-SCTP.
1272 memset(out, 0, outl);
1273 BIO_set_retry_read(b);
1277 BIO_clear_retry_flags(b);
1279 if (BIO_dgram_should_retry(ret)) {
1280 BIO_set_retry_read(b);
1281 data->_errno = get_last_socket_error();
1285 /* Test if peer uses SCTP-AUTH before continuing */
1286 if (!data->peer_auth_tested) {
1287 int ii, auth_data = 0, auth_forward = 0;
1289 struct sctp_authchunks *authchunks;
1292 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1293 authchunks = OPENSSL_malloc(optlen);
1295 BIOerr(BIO_F_DGRAM_SCTP_READ, ERR_R_MALLOC_FAILURE);
1298 memset(authchunks, 0, sizeof(optlen));
1299 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1300 authchunks, &optlen);
1303 for (p = (unsigned char *)authchunks->gauth_chunks;
1304 p < (unsigned char *)authchunks + optlen;
1305 p += sizeof(uint8_t)) {
1306 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1308 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1312 OPENSSL_free(authchunks);
1314 if (!auth_data || !auth_forward) {
1315 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1319 data->peer_auth_tested = 1;
1325 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1328 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1329 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1330 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1331 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1332 struct iovec iov[1];
1334 struct cmsghdr *cmsg;
1335 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1336 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1337 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1338 struct sctp_sndinfo *sndinfo;
1339 struct sctp_prinfo *prinfo;
1341 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1342 struct sctp_sndrcvinfo *sndrcvinfo;
1345 clear_socket_error();
1348 * If we're send anything else than application data, disable all user
1349 * parameters and flags.
1352 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1353 # ifdef SCTP_SACK_IMMEDIATELY
1354 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1356 sinfo = &handshake_sinfo;
1360 * If we have to send a shutdown alert message and the socket is not dry
1361 * yet, we have to save it and send it as soon as the socket gets dry.
1363 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b)) {
1365 data->saved_message.bio = b;
1366 if (!(tmp = OPENSSL_malloc(inl))) {
1367 BIOerr(BIO_F_DGRAM_SCTP_WRITE, ERR_R_MALLOC_FAILURE);
1370 if (data->saved_message.data)
1371 OPENSSL_free(data->saved_message.data);
1372 data->saved_message.data = tmp;
1373 memcpy(data->saved_message.data, in, inl);
1374 data->saved_message.length = inl;
1378 iov[0].iov_base = (char *)in;
1379 iov[0].iov_len = inl;
1380 msg.msg_name = NULL;
1381 msg.msg_namelen = 0;
1384 msg.msg_control = (caddr_t) cmsgbuf;
1385 msg.msg_controllen = 0;
1387 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1388 cmsg = (struct cmsghdr *)cmsgbuf;
1389 cmsg->cmsg_level = IPPROTO_SCTP;
1390 cmsg->cmsg_type = SCTP_SNDINFO;
1391 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1392 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1393 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1394 sndinfo->snd_sid = sinfo->snd_sid;
1395 sndinfo->snd_flags = sinfo->snd_flags;
1396 sndinfo->snd_ppid = sinfo->snd_ppid;
1397 sndinfo->snd_context = sinfo->snd_context;
1398 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1401 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1402 cmsg->cmsg_level = IPPROTO_SCTP;
1403 cmsg->cmsg_type = SCTP_PRINFO;
1404 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1405 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1406 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1407 prinfo->pr_policy = pinfo->pr_policy;
1408 prinfo->pr_value = pinfo->pr_value;
1409 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1411 cmsg = (struct cmsghdr *)cmsgbuf;
1412 cmsg->cmsg_level = IPPROTO_SCTP;
1413 cmsg->cmsg_type = SCTP_SNDRCV;
1414 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1415 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1416 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1417 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1418 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1420 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1422 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1423 sndrcvinfo->sinfo_context = sinfo->snd_context;
1424 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1425 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1428 ret = sendmsg(b->num, &msg, 0);
1430 BIO_clear_retry_flags(b);
1432 if (BIO_dgram_should_retry(ret)) {
1433 BIO_set_retry_write(b);
1434 data->_errno = get_last_socket_error();
1440 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1443 bio_dgram_sctp_data *data = NULL;
1444 socklen_t sockopt_len = 0;
1445 struct sctp_authkeyid authkeyid;
1446 struct sctp_authkey *authkey = NULL;
1448 data = (bio_dgram_sctp_data *) b->ptr;
1451 case BIO_CTRL_DGRAM_QUERY_MTU:
1453 * Set to maximum (2^14) and ignore user input to enable transport
1454 * protocol fragmentation. Returns always 2^14.
1459 case BIO_CTRL_DGRAM_SET_MTU:
1461 * Set to maximum (2^14) and ignore input to enable transport
1462 * protocol fragmentation. Returns always 2^14.
1467 case BIO_CTRL_DGRAM_SET_CONNECTED:
1468 case BIO_CTRL_DGRAM_CONNECT:
1469 /* Returns always -1. */
1472 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1474 * SCTP doesn't need the DTLS timer Returns always 1.
1477 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1479 * We allow transport protocol fragmentation so this is irrelevant
1483 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1485 data->in_handshake = 1;
1487 data->in_handshake = 0;
1490 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1491 &data->in_handshake, sizeof(int));
1493 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1495 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1498 /* Get active key */
1499 sockopt_len = sizeof(struct sctp_authkeyid);
1501 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1507 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1508 authkey = OPENSSL_malloc(sockopt_len);
1509 if (authkey == NULL) {
1513 memset(authkey, 0x00, sockopt_len);
1514 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1515 # ifndef __FreeBSD__
1517 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1518 * and higher work without it.
1520 authkey->sca_keylength = 64;
1522 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1525 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1527 OPENSSL_free(authkey);
1532 /* Reset active key */
1533 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1534 &authkeyid, sizeof(struct sctp_authkeyid));
1539 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1540 /* Returns 0 on success, -1 otherwise. */
1542 /* Get active key */
1543 sockopt_len = sizeof(struct sctp_authkeyid);
1545 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1550 /* Set active key */
1551 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1552 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1553 &authkeyid, sizeof(struct sctp_authkeyid));
1558 * CCS has been sent, so remember that and fall through to check if
1559 * we need to deactivate an old key
1563 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1564 /* Returns 0 on success, -1 otherwise. */
1567 * Has this command really been called or is this just a
1570 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1574 * CSS has been both, received and sent, so deactivate an old key
1576 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1577 /* Get active key */
1578 sockopt_len = sizeof(struct sctp_authkeyid);
1580 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1581 &authkeyid, &sockopt_len);
1586 * Deactivate key or delete second last key if
1587 * SCTP_AUTHENTICATION_EVENT is not available.
1589 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1590 # ifdef SCTP_AUTH_DEACTIVATE_KEY
1591 sockopt_len = sizeof(struct sctp_authkeyid);
1592 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1593 &authkeyid, sockopt_len);
1597 # ifndef SCTP_AUTHENTICATION_EVENT
1598 if (authkeyid.scact_keynumber > 0) {
1599 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1600 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1601 &authkeyid, sizeof(struct sctp_authkeyid));
1611 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1612 /* Returns the size of the copied struct. */
1613 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1614 num = sizeof(struct bio_dgram_sctp_sndinfo);
1616 memcpy(ptr, &(data->sndinfo), num);
1619 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1620 /* Returns the size of the copied struct. */
1621 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1622 num = sizeof(struct bio_dgram_sctp_sndinfo);
1624 memcpy(&(data->sndinfo), ptr, num);
1626 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1627 /* Returns the size of the copied struct. */
1628 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1629 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1631 memcpy(ptr, &data->rcvinfo, num);
1635 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1636 /* Returns the size of the copied struct. */
1637 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1638 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1640 memcpy(&(data->rcvinfo), ptr, num);
1642 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1643 /* Returns the size of the copied struct. */
1644 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1645 num = sizeof(struct bio_dgram_sctp_prinfo);
1647 memcpy(ptr, &(data->prinfo), num);
1650 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1651 /* Returns the size of the copied struct. */
1652 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1653 num = sizeof(struct bio_dgram_sctp_prinfo);
1655 memcpy(&(data->prinfo), ptr, num);
1657 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1658 /* Returns always 1. */
1660 data->save_shutdown = 1;
1662 data->save_shutdown = 0;
1667 * Pass to default ctrl function to process SCTP unspecific commands
1669 ret = dgram_ctrl(b, cmd, num, ptr);
1675 int BIO_dgram_sctp_notification_cb(BIO *b,
1676 void (*handle_notifications) (BIO *bio,
1682 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1684 if (handle_notifications != NULL) {
1685 data->handle_notifications = handle_notifications;
1686 data->notification_context = context;
1693 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1696 int n, sockflags, ret;
1697 union sctp_notification snp;
1701 struct sctp_event event;
1703 struct sctp_event_subscribe event;
1704 socklen_t eventsize;
1706 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1708 /* set sender dry event */
1710 memset(&event, 0, sizeof(struct sctp_event));
1711 event.se_assoc_id = 0;
1712 event.se_type = SCTP_SENDER_DRY_EVENT;
1715 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1716 sizeof(struct sctp_event));
1718 eventsize = sizeof(struct sctp_event_subscribe);
1719 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1723 event.sctp_sender_dry_event = 1;
1726 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1727 sizeof(struct sctp_event_subscribe));
1732 /* peek for notification */
1733 memset(&snp, 0x00, sizeof(union sctp_notification));
1734 iov.iov_base = (char *)&snp;
1735 iov.iov_len = sizeof(union sctp_notification);
1736 msg.msg_name = NULL;
1737 msg.msg_namelen = 0;
1740 msg.msg_control = NULL;
1741 msg.msg_controllen = 0;
1744 n = recvmsg(b->num, &msg, MSG_PEEK);
1746 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1747 && (get_last_socket_error() != EWOULDBLOCK))
1753 /* if we find a notification, process it and try again if necessary */
1754 while (msg.msg_flags & MSG_NOTIFICATION) {
1755 memset(&snp, 0x00, sizeof(union sctp_notification));
1756 iov.iov_base = (char *)&snp;
1757 iov.iov_len = sizeof(union sctp_notification);
1758 msg.msg_name = NULL;
1759 msg.msg_namelen = 0;
1762 msg.msg_control = NULL;
1763 msg.msg_controllen = 0;
1766 n = recvmsg(b->num, &msg, 0);
1768 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1769 && (get_last_socket_error() != EWOULDBLOCK))
1775 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1778 /* disable sender dry event */
1780 memset(&event, 0, sizeof(struct sctp_event));
1781 event.se_assoc_id = 0;
1782 event.se_type = SCTP_SENDER_DRY_EVENT;
1785 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1786 sizeof(struct sctp_event));
1788 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1790 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1795 event.sctp_sender_dry_event = 0;
1798 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1799 sizeof(struct sctp_event_subscribe));
1804 # ifdef SCTP_AUTHENTICATION_EVENT
1805 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1806 dgram_sctp_handle_auth_free_key_event(b, &snp);
1809 if (data->handle_notifications != NULL)
1810 data->handle_notifications(b, data->notification_context,
1813 /* found notification, peek again */
1814 memset(&snp, 0x00, sizeof(union sctp_notification));
1815 iov.iov_base = (char *)&snp;
1816 iov.iov_len = sizeof(union sctp_notification);
1817 msg.msg_name = NULL;
1818 msg.msg_namelen = 0;
1821 msg.msg_control = NULL;
1822 msg.msg_controllen = 0;
1825 /* if we have seen the dry already, don't wait */
1827 sockflags = fcntl(b->num, F_GETFL, 0);
1828 fcntl(b->num, F_SETFL, O_NONBLOCK);
1831 n = recvmsg(b->num, &msg, MSG_PEEK);
1834 fcntl(b->num, F_SETFL, sockflags);
1838 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1839 && (get_last_socket_error() != EWOULDBLOCK))
1846 /* read anything else */
1850 int BIO_dgram_sctp_msg_waiting(BIO *b)
1853 union sctp_notification snp;
1856 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1858 /* Check if there are any messages waiting to be read */
1860 memset(&snp, 0x00, sizeof(union sctp_notification));
1861 iov.iov_base = (char *)&snp;
1862 iov.iov_len = sizeof(union sctp_notification);
1863 msg.msg_name = NULL;
1864 msg.msg_namelen = 0;
1867 msg.msg_control = NULL;
1868 msg.msg_controllen = 0;
1871 sockflags = fcntl(b->num, F_GETFL, 0);
1872 fcntl(b->num, F_SETFL, O_NONBLOCK);
1873 n = recvmsg(b->num, &msg, MSG_PEEK);
1874 fcntl(b->num, F_SETFL, sockflags);
1876 /* if notification, process and try again */
1877 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1878 # ifdef SCTP_AUTHENTICATION_EVENT
1879 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1880 dgram_sctp_handle_auth_free_key_event(b, &snp);
1883 memset(&snp, 0x00, sizeof(union sctp_notification));
1884 iov.iov_base = (char *)&snp;
1885 iov.iov_len = sizeof(union sctp_notification);
1886 msg.msg_name = NULL;
1887 msg.msg_namelen = 0;
1890 msg.msg_control = NULL;
1891 msg.msg_controllen = 0;
1893 n = recvmsg(b->num, &msg, 0);
1895 if (data->handle_notifications != NULL)
1896 data->handle_notifications(b, data->notification_context,
1900 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1902 /* Return 1 if there is a message to be read, return 0 otherwise. */
1909 static int dgram_sctp_puts(BIO *bp, const char *str)
1914 ret = dgram_sctp_write(bp, str, n);
1919 static int BIO_dgram_should_retry(int i)
1923 if ((i == 0) || (i == -1)) {
1924 err = get_last_socket_error();
1926 # if defined(OPENSSL_SYS_WINDOWS)
1928 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1929 * this point, the error code was overwritten by another system call
1930 * before this error handling is called.
1934 return (BIO_dgram_non_fatal_error(err));
1939 int BIO_dgram_non_fatal_error(int err)
1942 # if defined(OPENSSL_SYS_WINDOWS)
1943 # if defined(WSAEWOULDBLOCK)
1944 case WSAEWOULDBLOCK:
1947 # if 0 /* This appears to always be an error */
1948 # if defined(WSAENOTCONN)
1955 # ifdef WSAEWOULDBLOCK
1956 # if WSAEWOULDBLOCK != EWOULDBLOCK
1969 # if EWOULDBLOCK != EAGAIN
1994 static void get_current_time(struct timeval *t)
1996 # ifdef OPENSSL_SYS_WIN32
1999 t->tv_sec = (long)tb.time;
2000 t->tv_usec = (long)tb.millitm * 1000;
2001 # elif defined(OPENSSL_SYS_VMS)
2004 t->tv_sec = (long)tb.time;
2005 t->tv_usec = (long)tb.millitm * 1000;
2007 gettimeofday(t, NULL);