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).
63 #include "internal/cryptlib.h"
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 if (timeleft.tv_usec < timenow.tv_usec) {
309 timeleft.tv_usec = 1000000 - timenow.tv_usec + timeleft.tv_usec;
312 timeleft.tv_usec -= timenow.tv_usec;
314 if (timeleft.tv_sec < timenow.tv_sec) {
316 timeleft.tv_usec = 1;
318 timeleft.tv_sec -= timenow.tv_sec;
322 * Adjust socket timeout if next handhake message timer will expire
325 if ((data->socket_timeout.tv_sec == 0
326 && data->socket_timeout.tv_usec == 0)
327 || (data->socket_timeout.tv_sec > timeleft.tv_sec)
328 || (data->socket_timeout.tv_sec == timeleft.tv_sec
329 && data->socket_timeout.tv_usec >= timeleft.tv_usec)) {
330 # ifdef OPENSSL_SYS_WINDOWS
331 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
332 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
333 (void *)&timeout, sizeof(timeout)) < 0) {
334 perror("setsockopt");
337 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
338 sizeof(struct timeval)) < 0) {
339 perror("setsockopt");
347 static void dgram_reset_rcv_timeout(BIO *b)
349 # if defined(SO_RCVTIMEO)
350 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
352 /* Is a timer active? */
353 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) {
354 # ifdef OPENSSL_SYS_WINDOWS
355 int timeout = data->socket_timeout.tv_sec * 1000 +
356 data->socket_timeout.tv_usec / 1000;
357 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
358 (void *)&timeout, sizeof(timeout)) < 0) {
359 perror("setsockopt");
363 (b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
364 sizeof(struct timeval)) < 0) {
365 perror("setsockopt");
372 static int dgram_read(BIO *b, char *out, int outl)
375 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
379 * See commentary in b_sock.c. <appro>
387 struct sockaddr_in sa_in;
388 # if OPENSSL_USE_IPV6
389 struct sockaddr_in6 sa_in6;
395 sa.len.i = sizeof(sa.peer);
398 clear_socket_error();
399 memset(&sa.peer, 0, sizeof(sa.peer));
400 dgram_adjust_rcv_timeout(b);
401 ret = recvfrom(b->num, out, outl, 0, &sa.peer.sa, (void *)&sa.len);
402 if (sizeof(sa.len.i) != sizeof(sa.len.s) && sa.len.i == 0) {
403 OPENSSL_assert(sa.len.s <= sizeof(sa.peer));
404 sa.len.i = (int)sa.len.s;
407 if (!data->connected && ret >= 0)
408 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
410 BIO_clear_retry_flags(b);
412 if (BIO_dgram_should_retry(ret)) {
413 BIO_set_retry_read(b);
414 data->_errno = get_last_socket_error();
418 dgram_reset_rcv_timeout(b);
423 static int dgram_write(BIO *b, const char *in, int inl)
426 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
427 clear_socket_error();
430 ret = writesocket(b->num, in, inl);
432 int peerlen = sizeof(data->peer);
434 if (data->peer.sa.sa_family == AF_INET)
435 peerlen = sizeof(data->peer.sa_in);
436 # if OPENSSL_USE_IPV6
437 else if (data->peer.sa.sa_family == AF_INET6)
438 peerlen = sizeof(data->peer.sa_in6);
440 # if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
441 ret = sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
443 ret = sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
447 BIO_clear_retry_flags(b);
449 if (BIO_dgram_should_retry(ret)) {
450 BIO_set_retry_write(b);
451 data->_errno = get_last_socket_error();
457 static long dgram_get_mtu_overhead(bio_dgram_data *data)
461 switch (data->peer.sa.sa_family) {
464 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
468 # if OPENSSL_USE_IPV6
470 # ifdef IN6_IS_ADDR_V4MAPPED
471 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
473 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
479 * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
485 /* We don't know. Go with the historical default */
492 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
496 struct sockaddr *to = NULL;
497 bio_dgram_data *data = NULL;
499 # if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
500 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
501 * modern enough to define socklen_t */
505 struct sockaddr_in s4;
506 # if OPENSSL_USE_IPV6
507 struct sockaddr_in6 s6;
512 data = (bio_dgram_data *)b->ptr;
517 case BIO_C_FILE_SEEK:
520 case BIO_C_FILE_TELL:
526 b->num = *((int *)ptr);
527 b->shutdown = (int)num;
539 case BIO_CTRL_GET_CLOSE:
542 case BIO_CTRL_SET_CLOSE:
543 b->shutdown = (int)num;
545 case BIO_CTRL_PENDING:
546 case BIO_CTRL_WPENDING:
553 case BIO_CTRL_DGRAM_CONNECT:
554 to = (struct sockaddr *)ptr;
555 switch (to->sa_family) {
557 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
559 # if OPENSSL_USE_IPV6
561 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
565 memcpy(&data->peer, to, sizeof(data->peer.sa));
569 /* (Linux)kernel sets DF bit on outgoing IP packets */
570 case BIO_CTRL_DGRAM_MTU_DISCOVER:
571 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
572 addr_len = (socklen_t) sizeof(addr);
573 memset(&addr, 0, sizeof(addr));
574 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
578 switch (addr.sa.sa_family) {
580 sockopt_val = IP_PMTUDISC_DO;
581 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
582 &sockopt_val, sizeof(sockopt_val))) < 0)
583 perror("setsockopt");
585 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
587 sockopt_val = IPV6_PMTUDISC_DO;
588 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
589 &sockopt_val, sizeof(sockopt_val))) < 0)
590 perror("setsockopt");
601 case BIO_CTRL_DGRAM_QUERY_MTU:
602 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
603 addr_len = (socklen_t) sizeof(addr);
604 memset(&addr, 0, sizeof(addr));
605 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
609 sockopt_len = sizeof(sockopt_val);
610 switch (addr.sa.sa_family) {
613 getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
614 &sockopt_len)) < 0 || sockopt_val < 0) {
618 * we assume that the transport protocol is UDP and no IP
621 data->mtu = sockopt_val - 8 - 20;
625 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
628 getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
629 (void *)&sockopt_val, &sockopt_len)) < 0
630 || sockopt_val < 0) {
634 * we assume that the transport protocol is UDP and no IPV6
637 data->mtu = sockopt_val - 8 - 40;
650 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
651 ret = -dgram_get_mtu_overhead(data);
652 switch (data->peer.sa.sa_family) {
656 # if OPENSSL_USE_IPV6
658 # ifdef IN6_IS_ADDR_V4MAPPED
659 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
671 case BIO_CTRL_DGRAM_GET_MTU:
673 case BIO_CTRL_DGRAM_SET_MTU:
677 case BIO_CTRL_DGRAM_SET_CONNECTED:
678 to = (struct sockaddr *)ptr;
682 switch (to->sa_family) {
684 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
686 # if OPENSSL_USE_IPV6
688 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
692 memcpy(&data->peer, to, sizeof(data->peer.sa));
697 memset(&data->peer, 0, sizeof(data->peer));
700 case BIO_CTRL_DGRAM_GET_PEER:
701 switch (data->peer.sa.sa_family) {
703 ret = sizeof(data->peer.sa_in);
705 # if OPENSSL_USE_IPV6
707 ret = sizeof(data->peer.sa_in6);
711 ret = sizeof(data->peer.sa);
714 if (num == 0 || num > ret)
716 memcpy(ptr, &data->peer, (ret = num));
718 case BIO_CTRL_DGRAM_SET_PEER:
719 to = (struct sockaddr *)ptr;
720 switch (to->sa_family) {
722 memcpy(&data->peer, to, sizeof(data->peer.sa_in));
724 # if OPENSSL_USE_IPV6
726 memcpy(&data->peer, to, sizeof(data->peer.sa_in6));
730 memcpy(&data->peer, to, sizeof(data->peer.sa));
734 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
735 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
737 # if defined(SO_RCVTIMEO)
738 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
739 # ifdef OPENSSL_SYS_WINDOWS
741 struct timeval *tv = (struct timeval *)ptr;
742 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
743 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
744 (void *)&timeout, sizeof(timeout)) < 0) {
745 perror("setsockopt");
750 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
751 sizeof(struct timeval)) < 0) {
752 perror("setsockopt");
757 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
765 # ifdef OPENSSL_SYS_WINDOWS
767 struct timeval *tv = (struct timeval *)ptr;
769 sz.i = sizeof(timeout);
770 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
771 (void *)&timeout, &sz.i) < 0) {
772 perror("getsockopt");
775 tv->tv_sec = timeout / 1000;
776 tv->tv_usec = (timeout % 1000) * 1000;
780 sz.i = sizeof(struct timeval);
781 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
782 ptr, (void *)&sz) < 0) {
783 perror("getsockopt");
785 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
786 OPENSSL_assert(sz.s <= sizeof(struct timeval));
794 # if defined(SO_SNDTIMEO)
795 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
796 # ifdef OPENSSL_SYS_WINDOWS
798 struct timeval *tv = (struct timeval *)ptr;
799 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
800 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
801 (void *)&timeout, sizeof(timeout)) < 0) {
802 perror("setsockopt");
807 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
808 sizeof(struct timeval)) < 0) {
809 perror("setsockopt");
814 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
822 # ifdef OPENSSL_SYS_WINDOWS
824 struct timeval *tv = (struct timeval *)ptr;
826 sz.i = sizeof(timeout);
827 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
828 (void *)&timeout, &sz.i) < 0) {
829 perror("getsockopt");
832 tv->tv_sec = timeout / 1000;
833 tv->tv_usec = (timeout % 1000) * 1000;
837 sz.i = sizeof(struct timeval);
838 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
839 ptr, (void *)&sz) < 0) {
840 perror("getsockopt");
842 } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) {
843 OPENSSL_assert(sz.s <= sizeof(struct timeval));
851 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
853 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
854 # ifdef OPENSSL_SYS_WINDOWS
855 if (data->_errno == WSAETIMEDOUT)
857 if (data->_errno == EAGAIN)
866 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
867 if (data->_errno == EMSGSIZE) {
874 case BIO_CTRL_DGRAM_SET_DONT_FRAG:
875 sockopt_val = num ? 1 : 0;
877 switch (data->peer.sa.sa_family) {
879 # if defined(IP_DONTFRAG)
880 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG,
881 &sockopt_val, sizeof(sockopt_val))) < 0) {
882 perror("setsockopt");
885 # elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined (IP_PMTUDISC_PROBE)
886 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
887 (ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
888 &sockopt_val, sizeof(sockopt_val))) < 0) {
889 perror("setsockopt");
892 # elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT)
893 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT,
894 (const char *)&sockopt_val,
895 sizeof(sockopt_val))) < 0) {
896 perror("setsockopt");
903 # if OPENSSL_USE_IPV6
905 # if defined(IPV6_DONTFRAG)
906 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
907 (const void *)&sockopt_val,
908 sizeof(sockopt_val))) < 0) {
909 perror("setsockopt");
912 # elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER)
913 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
914 (ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
915 &sockopt_val, sizeof(sockopt_val))) < 0) {
916 perror("setsockopt");
929 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
930 ret = dgram_get_mtu_overhead(data);
939 static int dgram_puts(BIO *bp, const char *str)
944 ret = dgram_write(bp, str, n);
948 # ifndef OPENSSL_NO_SCTP
949 BIO_METHOD *BIO_s_datagram_sctp(void)
951 return (&methods_dgramp_sctp);
954 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
957 int ret, optval = 20000;
958 int auth_data = 0, auth_forward = 0;
960 struct sctp_authchunk auth;
961 struct sctp_authchunks *authchunks;
962 socklen_t sockopt_len;
963 # ifdef SCTP_AUTHENTICATION_EVENT
965 struct sctp_event event;
967 struct sctp_event_subscribe event;
971 bio = BIO_new(BIO_s_datagram_sctp());
974 BIO_set_fd(bio, fd, close_flag);
976 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
977 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
979 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
980 sizeof(struct sctp_authchunk));
985 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
987 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
988 sizeof(struct sctp_authchunk));
995 * Test if activation was successful. When using accept(), SCTP-AUTH has
996 * to be activated for the listening socket already, otherwise the
997 * connected socket won't use it.
999 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1000 authchunks = OPENSSL_malloc(sockopt_len);
1005 memset(authchunks, 0, sockopt_len);
1007 getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
1011 OPENSSL_free(authchunks);
1016 for (p = (unsigned char *)authchunks->gauth_chunks;
1017 p < (unsigned char *)authchunks + sockopt_len;
1018 p += sizeof(uint8_t)) {
1019 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1021 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1025 OPENSSL_free(authchunks);
1027 OPENSSL_assert(auth_data);
1028 OPENSSL_assert(auth_forward);
1030 # ifdef SCTP_AUTHENTICATION_EVENT
1032 memset(&event, 0, sizeof(event));
1033 event.se_assoc_id = 0;
1034 event.se_type = SCTP_AUTHENTICATION_EVENT;
1037 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
1038 sizeof(struct sctp_event));
1044 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
1045 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
1051 event.sctp_authentication_event = 1;
1054 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
1055 sizeof(struct sctp_event_subscribe));
1064 * Disable partial delivery by setting the min size larger than the max
1065 * record size of 2^14 + 2048 + 13
1068 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
1078 int BIO_dgram_is_sctp(BIO *bio)
1080 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
1083 static int dgram_sctp_new(BIO *bi)
1085 bio_dgram_sctp_data *data = NULL;
1089 data = OPENSSL_malloc(sizeof(*data));
1092 memset(data, 0, sizeof(*data));
1093 # ifdef SCTP_PR_SCTP_NONE
1094 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1102 static int dgram_sctp_free(BIO *a)
1104 bio_dgram_sctp_data *data;
1108 if (!dgram_clear(a))
1111 data = (bio_dgram_sctp_data *) a->ptr;
1113 OPENSSL_free(data->saved_message.data);
1120 # ifdef SCTP_AUTHENTICATION_EVENT
1121 void dgram_sctp_handle_auth_free_key_event(BIO *b,
1122 union sctp_notification *snp)
1125 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
1127 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
1128 struct sctp_authkeyid authkeyid;
1131 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1132 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1133 &authkeyid, sizeof(struct sctp_authkeyid));
1138 static int dgram_sctp_read(BIO *b, char *out, int outl)
1140 int ret = 0, n = 0, i, optval;
1142 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1143 union sctp_notification *snp;
1146 struct cmsghdr *cmsg;
1150 clear_socket_error();
1153 memset(&data->rcvinfo, 0, sizeof(data->rcvinfo));
1156 msg.msg_name = NULL;
1157 msg.msg_namelen = 0;
1160 msg.msg_control = cmsgbuf;
1161 msg.msg_controllen = 512;
1163 n = recvmsg(b->num, &msg, 0);
1171 if (msg.msg_controllen > 0) {
1172 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1173 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1174 if (cmsg->cmsg_level != IPPROTO_SCTP)
1176 # ifdef SCTP_RCVINFO
1177 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1178 struct sctp_rcvinfo *rcvinfo;
1180 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1181 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1182 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1183 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1184 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1185 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1186 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1187 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1191 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1192 struct sctp_sndrcvinfo *sndrcvinfo;
1195 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1196 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1197 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1198 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1199 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1200 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1201 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1202 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1208 if (msg.msg_flags & MSG_NOTIFICATION) {
1209 snp = (union sctp_notification *)out;
1210 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1212 struct sctp_event event;
1214 struct sctp_event_subscribe event;
1215 socklen_t eventsize;
1218 * If a message has been delayed until the socket is dry,
1219 * it can be sent now.
1221 if (data->saved_message.length > 0) {
1222 dgram_sctp_write(data->saved_message.bio,
1223 data->saved_message.data,
1224 data->saved_message.length);
1225 OPENSSL_free(data->saved_message.data);
1226 data->saved_message.data = NULL;
1227 data->saved_message.length = 0;
1230 /* disable sender dry event */
1232 memset(&event, 0, sizeof(event));
1233 event.se_assoc_id = 0;
1234 event.se_type = SCTP_SENDER_DRY_EVENT;
1236 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1237 sizeof(struct sctp_event));
1243 eventsize = sizeof(struct sctp_event_subscribe);
1244 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1251 event.sctp_sender_dry_event = 0;
1253 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1254 sizeof(struct sctp_event_subscribe));
1261 # ifdef SCTP_AUTHENTICATION_EVENT
1262 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1263 dgram_sctp_handle_auth_free_key_event(b, snp);
1266 if (data->handle_notifications != NULL)
1267 data->handle_notifications(b, data->notification_context,
1270 memset(out, 0, outl);
1274 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
1277 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
1278 /* Partial message read, this should never happen! */
1281 * The buffer was too small, this means the peer sent a message
1282 * that was larger than allowed.
1288 * Test if socket buffer can handle max record size (2^14 + 2048
1291 optlen = (socklen_t) sizeof(int);
1292 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1294 OPENSSL_assert(optval >= 18445);
1297 * Test if SCTP doesn't partially deliver below max record size
1298 * (2^14 + 2048 + 13)
1300 optlen = (socklen_t) sizeof(int);
1302 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1305 OPENSSL_assert(optval >= 18445);
1308 * Partially delivered notification??? Probably a bug....
1310 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1313 * Everything seems ok till now, so it's most likely a message
1314 * dropped by PR-SCTP.
1316 memset(out, 0, outl);
1317 BIO_set_retry_read(b);
1321 BIO_clear_retry_flags(b);
1323 if (BIO_dgram_should_retry(ret)) {
1324 BIO_set_retry_read(b);
1325 data->_errno = get_last_socket_error();
1329 /* Test if peer uses SCTP-AUTH before continuing */
1330 if (!data->peer_auth_tested) {
1331 int ii, auth_data = 0, auth_forward = 0;
1333 struct sctp_authchunks *authchunks;
1336 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1337 authchunks = OPENSSL_malloc(optlen);
1339 BIOerr(BIO_F_DGRAM_SCTP_READ, ERR_R_MALLOC_FAILURE);
1342 memset(authchunks, 0, optlen);
1343 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
1344 authchunks, &optlen);
1347 for (p = (unsigned char *)authchunks->gauth_chunks;
1348 p < (unsigned char *)authchunks + optlen;
1349 p += sizeof(uint8_t)) {
1350 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1352 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1356 OPENSSL_free(authchunks);
1358 if (!auth_data || !auth_forward) {
1359 BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR);
1363 data->peer_auth_tested = 1;
1369 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1372 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1373 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1374 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1375 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1376 struct iovec iov[1];
1378 struct cmsghdr *cmsg;
1379 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1380 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
1381 CMSG_SPACE(sizeof(struct sctp_prinfo))];
1382 struct sctp_sndinfo *sndinfo;
1383 struct sctp_prinfo *prinfo;
1385 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1386 struct sctp_sndrcvinfo *sndrcvinfo;
1389 clear_socket_error();
1392 * If we're send anything else than application data, disable all user
1393 * parameters and flags.
1396 memset(&handshake_sinfo, 0, sizeof(handshake_sinfo));
1397 # ifdef SCTP_SACK_IMMEDIATELY
1398 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1400 sinfo = &handshake_sinfo;
1404 * If we have to send a shutdown alert message and the socket is not dry
1405 * yet, we have to save it and send it as soon as the socket gets dry.
1407 if (data->save_shutdown) {
1408 ret = BIO_dgram_sctp_wait_for_dry(b);
1414 data->saved_message.bio = b;
1415 if ((tmp = OPENSSL_malloc(inl)) == NULL) {
1416 BIOerr(BIO_F_DGRAM_SCTP_WRITE, ERR_R_MALLOC_FAILURE);
1419 OPENSSL_free(data->saved_message.data);
1420 data->saved_message.data = tmp;
1421 memcpy(data->saved_message.data, in, inl);
1422 data->saved_message.length = inl;
1427 iov[0].iov_base = (char *)in;
1428 iov[0].iov_len = inl;
1429 msg.msg_name = NULL;
1430 msg.msg_namelen = 0;
1433 msg.msg_control = (caddr_t) cmsgbuf;
1434 msg.msg_controllen = 0;
1436 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1437 cmsg = (struct cmsghdr *)cmsgbuf;
1438 cmsg->cmsg_level = IPPROTO_SCTP;
1439 cmsg->cmsg_type = SCTP_SNDINFO;
1440 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1441 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1442 memset(sndinfo, 0, sizeof(*sndinfo));
1443 sndinfo->snd_sid = sinfo->snd_sid;
1444 sndinfo->snd_flags = sinfo->snd_flags;
1445 sndinfo->snd_ppid = sinfo->snd_ppid;
1446 sndinfo->snd_context = sinfo->snd_context;
1447 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1450 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1451 cmsg->cmsg_level = IPPROTO_SCTP;
1452 cmsg->cmsg_type = SCTP_PRINFO;
1453 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1454 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1455 memset(prinfo, 0, sizeof(*prinfo));
1456 prinfo->pr_policy = pinfo->pr_policy;
1457 prinfo->pr_value = pinfo->pr_value;
1458 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1460 cmsg = (struct cmsghdr *)cmsgbuf;
1461 cmsg->cmsg_level = IPPROTO_SCTP;
1462 cmsg->cmsg_type = SCTP_SNDRCV;
1463 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1464 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1465 memset(sndrcvinfo, 0, sizeof(*sndrcvinfo));
1466 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1467 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1469 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1471 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1472 sndrcvinfo->sinfo_context = sinfo->snd_context;
1473 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1474 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1477 ret = sendmsg(b->num, &msg, 0);
1479 BIO_clear_retry_flags(b);
1481 if (BIO_dgram_should_retry(ret)) {
1482 BIO_set_retry_write(b);
1483 data->_errno = get_last_socket_error();
1489 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1492 bio_dgram_sctp_data *data = NULL;
1493 socklen_t sockopt_len = 0;
1494 struct sctp_authkeyid authkeyid;
1495 struct sctp_authkey *authkey = NULL;
1497 data = (bio_dgram_sctp_data *) b->ptr;
1500 case BIO_CTRL_DGRAM_QUERY_MTU:
1502 * Set to maximum (2^14) and ignore user input to enable transport
1503 * protocol fragmentation. Returns always 2^14.
1508 case BIO_CTRL_DGRAM_SET_MTU:
1510 * Set to maximum (2^14) and ignore input to enable transport
1511 * protocol fragmentation. Returns always 2^14.
1516 case BIO_CTRL_DGRAM_SET_CONNECTED:
1517 case BIO_CTRL_DGRAM_CONNECT:
1518 /* Returns always -1. */
1521 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1523 * SCTP doesn't need the DTLS timer Returns always 1.
1526 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1528 * We allow transport protocol fragmentation so this is irrelevant
1532 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1534 data->in_handshake = 1;
1536 data->in_handshake = 0;
1539 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
1540 &data->in_handshake, sizeof(int));
1542 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1544 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
1547 /* Get active key */
1548 sockopt_len = sizeof(struct sctp_authkeyid);
1550 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1556 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1557 authkey = OPENSSL_malloc(sockopt_len);
1558 if (authkey == NULL) {
1562 memset(authkey, 0, sockopt_len);
1563 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1564 # ifndef __FreeBSD__
1566 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
1567 * and higher work without it.
1569 authkey->sca_keylength = 64;
1571 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1574 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
1576 OPENSSL_free(authkey);
1581 /* Reset active key */
1582 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1583 &authkeyid, sizeof(struct sctp_authkeyid));
1588 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1589 /* Returns 0 on success, -1 otherwise. */
1591 /* Get active key */
1592 sockopt_len = sizeof(struct sctp_authkeyid);
1594 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
1599 /* Set active key */
1600 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1601 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1602 &authkeyid, sizeof(struct sctp_authkeyid));
1607 * CCS has been sent, so remember that and fall through to check if
1608 * we need to deactivate an old key
1612 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1613 /* Returns 0 on success, -1 otherwise. */
1616 * Has this command really been called or is this just a
1619 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1623 * CSS has been both, received and sent, so deactivate an old key
1625 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
1626 /* Get active key */
1627 sockopt_len = sizeof(struct sctp_authkeyid);
1629 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1630 &authkeyid, &sockopt_len);
1635 * Deactivate key or delete second last key if
1636 * SCTP_AUTHENTICATION_EVENT is not available.
1638 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1639 # ifdef SCTP_AUTH_DEACTIVATE_KEY
1640 sockopt_len = sizeof(struct sctp_authkeyid);
1641 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1642 &authkeyid, sockopt_len);
1646 # ifndef SCTP_AUTHENTICATION_EVENT
1647 if (authkeyid.scact_keynumber > 0) {
1648 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1649 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1650 &authkeyid, sizeof(struct sctp_authkeyid));
1660 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1661 /* Returns the size of the copied struct. */
1662 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1663 num = sizeof(struct bio_dgram_sctp_sndinfo);
1665 memcpy(ptr, &(data->sndinfo), num);
1668 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1669 /* Returns the size of the copied struct. */
1670 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
1671 num = sizeof(struct bio_dgram_sctp_sndinfo);
1673 memcpy(&(data->sndinfo), ptr, num);
1675 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1676 /* Returns the size of the copied struct. */
1677 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1678 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1680 memcpy(ptr, &data->rcvinfo, num);
1684 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1685 /* Returns the size of the copied struct. */
1686 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
1687 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1689 memcpy(&(data->rcvinfo), ptr, num);
1691 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1692 /* Returns the size of the copied struct. */
1693 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1694 num = sizeof(struct bio_dgram_sctp_prinfo);
1696 memcpy(ptr, &(data->prinfo), num);
1699 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1700 /* Returns the size of the copied struct. */
1701 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
1702 num = sizeof(struct bio_dgram_sctp_prinfo);
1704 memcpy(&(data->prinfo), ptr, num);
1706 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1707 /* Returns always 1. */
1709 data->save_shutdown = 1;
1711 data->save_shutdown = 0;
1716 * Pass to default ctrl function to process SCTP unspecific commands
1718 ret = dgram_ctrl(b, cmd, num, ptr);
1724 int BIO_dgram_sctp_notification_cb(BIO *b,
1725 void (*handle_notifications) (BIO *bio,
1731 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1733 if (handle_notifications != NULL) {
1734 data->handle_notifications = handle_notifications;
1735 data->notification_context = context;
1743 * BIO_dgram_sctp_wait_for_dry - Wait for SCTP SENDER_DRY event
1744 * @b: The BIO to check for the dry event
1746 * Wait until the peer confirms all packets have been received, and so that
1747 * our kernel doesn't have anything to send anymore. This is only received by
1748 * the peer's kernel, not the application.
1752 * 0 when not dry yet
1755 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1758 int n, sockflags, ret;
1759 union sctp_notification snp;
1763 struct sctp_event event;
1765 struct sctp_event_subscribe event;
1766 socklen_t eventsize;
1768 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1770 /* set sender dry event */
1772 memset(&event, 0, sizeof(event));
1773 event.se_assoc_id = 0;
1774 event.se_type = SCTP_SENDER_DRY_EVENT;
1777 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1778 sizeof(struct sctp_event));
1780 eventsize = sizeof(struct sctp_event_subscribe);
1781 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1785 event.sctp_sender_dry_event = 1;
1788 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1789 sizeof(struct sctp_event_subscribe));
1794 /* peek for notification */
1795 memset(&snp, 0, sizeof(snp));
1796 iov.iov_base = (char *)&snp;
1797 iov.iov_len = sizeof(union sctp_notification);
1798 msg.msg_name = NULL;
1799 msg.msg_namelen = 0;
1802 msg.msg_control = NULL;
1803 msg.msg_controllen = 0;
1806 n = recvmsg(b->num, &msg, MSG_PEEK);
1808 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1809 && (get_last_socket_error() != EWOULDBLOCK))
1815 /* if we find a notification, process it and try again if necessary */
1816 while (msg.msg_flags & MSG_NOTIFICATION) {
1817 memset(&snp, 0, sizeof(snp));
1818 iov.iov_base = (char *)&snp;
1819 iov.iov_len = sizeof(union sctp_notification);
1820 msg.msg_name = NULL;
1821 msg.msg_namelen = 0;
1824 msg.msg_control = NULL;
1825 msg.msg_controllen = 0;
1828 n = recvmsg(b->num, &msg, 0);
1830 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1831 && (get_last_socket_error() != EWOULDBLOCK))
1837 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1840 /* disable sender dry event */
1842 memset(&event, 0, sizeof(event));
1843 event.se_assoc_id = 0;
1844 event.se_type = SCTP_SENDER_DRY_EVENT;
1847 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
1848 sizeof(struct sctp_event));
1850 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1852 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1857 event.sctp_sender_dry_event = 0;
1860 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
1861 sizeof(struct sctp_event_subscribe));
1866 # ifdef SCTP_AUTHENTICATION_EVENT
1867 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1868 dgram_sctp_handle_auth_free_key_event(b, &snp);
1871 if (data->handle_notifications != NULL)
1872 data->handle_notifications(b, data->notification_context,
1875 /* found notification, peek again */
1876 memset(&snp, 0, sizeof(snp));
1877 iov.iov_base = (char *)&snp;
1878 iov.iov_len = sizeof(union sctp_notification);
1879 msg.msg_name = NULL;
1880 msg.msg_namelen = 0;
1883 msg.msg_control = NULL;
1884 msg.msg_controllen = 0;
1887 /* if we have seen the dry already, don't wait */
1889 sockflags = fcntl(b->num, F_GETFL, 0);
1890 fcntl(b->num, F_SETFL, O_NONBLOCK);
1893 n = recvmsg(b->num, &msg, MSG_PEEK);
1896 fcntl(b->num, F_SETFL, sockflags);
1900 if ((n < 0) && (get_last_socket_error() != EAGAIN)
1901 && (get_last_socket_error() != EWOULDBLOCK))
1908 /* read anything else */
1912 int BIO_dgram_sctp_msg_waiting(BIO *b)
1915 union sctp_notification snp;
1918 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1920 /* Check if there are any messages waiting to be read */
1922 memset(&snp, 0, sizeof(snp));
1923 iov.iov_base = (char *)&snp;
1924 iov.iov_len = sizeof(union sctp_notification);
1925 msg.msg_name = NULL;
1926 msg.msg_namelen = 0;
1929 msg.msg_control = NULL;
1930 msg.msg_controllen = 0;
1933 sockflags = fcntl(b->num, F_GETFL, 0);
1934 fcntl(b->num, F_SETFL, O_NONBLOCK);
1935 n = recvmsg(b->num, &msg, MSG_PEEK);
1936 fcntl(b->num, F_SETFL, sockflags);
1938 /* if notification, process and try again */
1939 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
1940 # ifdef SCTP_AUTHENTICATION_EVENT
1941 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1942 dgram_sctp_handle_auth_free_key_event(b, &snp);
1945 memset(&snp, 0, sizeof(snp));
1946 iov.iov_base = (char *)&snp;
1947 iov.iov_len = sizeof(union sctp_notification);
1948 msg.msg_name = NULL;
1949 msg.msg_namelen = 0;
1952 msg.msg_control = NULL;
1953 msg.msg_controllen = 0;
1955 n = recvmsg(b->num, &msg, 0);
1957 if (data->handle_notifications != NULL)
1958 data->handle_notifications(b, data->notification_context,
1962 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1964 /* Return 1 if there is a message to be read, return 0 otherwise. */
1971 static int dgram_sctp_puts(BIO *bp, const char *str)
1976 ret = dgram_sctp_write(bp, str, n);
1981 static int BIO_dgram_should_retry(int i)
1985 if ((i == 0) || (i == -1)) {
1986 err = get_last_socket_error();
1988 # if defined(OPENSSL_SYS_WINDOWS)
1990 * If the socket return value (i) is -1 and err is unexpectedly 0 at
1991 * this point, the error code was overwritten by another system call
1992 * before this error handling is called.
1996 return (BIO_dgram_non_fatal_error(err));
2001 int BIO_dgram_non_fatal_error(int err)
2004 # if defined(OPENSSL_SYS_WINDOWS)
2005 # if defined(WSAEWOULDBLOCK)
2006 case WSAEWOULDBLOCK:
2011 # ifdef WSAEWOULDBLOCK
2012 # if WSAEWOULDBLOCK != EWOULDBLOCK
2025 # if EWOULDBLOCK != EAGAIN
2050 static void get_current_time(struct timeval *t)
2052 # if defined(_WIN32)
2055 unsigned __int64 ul;
2060 SystemTimeToFileTime(&st, &now.ft);
2062 now.ul -= 116444736000000000ULL;
2064 now.ul -= 116444736000000000UI64; /* re-bias to 1/1/1970 */
2066 t->tv_sec = (long)(now.ul / 10000000);
2067 t->tv_usec = ((int)(now.ul % 10000000)) / 10;
2068 # elif defined(OPENSSL_SYS_VMS)
2071 t->tv_sec = (long)tb.time;
2072 t->tv_usec = (long)tb.millitm * 1000;
2074 gettimeofday(t, NULL);