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).
66 #include <openssl/bio.h>
67 #ifndef OPENSSL_NO_DGRAM
69 #if defined(OPENSSL_SYS_VMS)
70 #include <sys/timeb.h>
73 #ifndef OPENSSL_NO_SCTP
74 #include <netinet/sctp.h>
76 #define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
77 #define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
80 #if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
81 #define IP_MTU 14 /* linux is lame */
84 #if OPENSSL_USE_IPV6 && !defined(IPPROTO_IPV6)
85 #define IPPROTO_IPV6 41 /* windows is lame */
88 #if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
89 /* Standard definition causes type-punning problems. */
90 #undef IN6_IS_ADDR_V4MAPPED
91 #define s6_addr32 __u6_addr.__u6_addr32
92 #define IN6_IS_ADDR_V4MAPPED(a) \
93 (((a)->s6_addr32[0] == 0) && \
94 ((a)->s6_addr32[1] == 0) && \
95 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
99 #define sock_write SockWrite /* Watt-32 uses same names */
100 #define sock_read SockRead
101 #define sock_puts SockPuts
104 static int dgram_write(BIO *h, const char *buf, int num);
105 static int dgram_read(BIO *h, char *buf, int size);
106 static int dgram_puts(BIO *h, const char *str);
107 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
108 static int dgram_new(BIO *h);
109 static int dgram_free(BIO *data);
110 static int dgram_clear(BIO *bio);
112 #ifndef OPENSSL_NO_SCTP
113 static int dgram_sctp_write(BIO *h, const char *buf, int num);
114 static int dgram_sctp_read(BIO *h, char *buf, int size);
115 static int dgram_sctp_puts(BIO *h, const char *str);
116 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
117 static int dgram_sctp_new(BIO *h);
118 static int dgram_sctp_free(BIO *data);
119 #ifdef SCTP_AUTHENTICATION_EVENT
120 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp);
124 static int BIO_dgram_should_retry(int s);
126 static void get_current_time(struct timeval *t);
128 static BIO_METHOD methods_dgramp=
135 NULL, /* dgram_gets, */
142 #ifndef OPENSSL_NO_SCTP
143 static BIO_METHOD methods_dgramp_sctp=
146 "datagram sctp socket",
150 NULL, /* dgram_gets, */
158 typedef struct bio_dgram_data_st
162 struct sockaddr_in sa_in;
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
180 } bio_dgram_sctp_save_message;
182 typedef struct bio_dgram_sctp_data_st
186 struct sockaddr_in sa_in;
188 struct sockaddr_in6 sa_in6;
191 unsigned int connected;
194 struct bio_dgram_sctp_sndinfo sndinfo;
195 struct bio_dgram_sctp_rcvinfo rcvinfo;
196 struct bio_dgram_sctp_prinfo prinfo;
197 void (*handle_notifications)(BIO *bio, void *context, void *buf);
198 void* notification_context;
203 int peer_auth_tested;
204 bio_dgram_sctp_save_message saved_message;
205 } bio_dgram_sctp_data;
208 BIO_METHOD *BIO_s_datagram(void)
210 return(&methods_dgramp);
213 BIO *BIO_new_dgram(int fd, int close_flag)
217 ret=BIO_new(BIO_s_datagram());
218 if (ret == NULL) return(NULL);
219 BIO_set_fd(ret,fd,close_flag);
223 static int dgram_new(BIO *bi)
225 bio_dgram_data *data = NULL;
229 data = OPENSSL_malloc(sizeof(bio_dgram_data));
232 memset(data, 0x00, sizeof(bio_dgram_data));
239 static int dgram_free(BIO *a)
241 bio_dgram_data *data;
243 if (a == NULL) return(0);
244 if ( ! dgram_clear(a))
247 data = (bio_dgram_data *)a->ptr;
248 if(data != NULL) OPENSSL_free(data);
253 static int dgram_clear(BIO *a)
255 if (a == NULL) return(0);
268 static void dgram_adjust_rcv_timeout(BIO *b)
270 #if defined(SO_RCVTIMEO)
271 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
272 union { size_t s; int i; } sz = {0};
274 /* Is a timer active? */
275 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0)
277 struct timeval timenow, timeleft;
279 /* Read current socket timeout */
280 #ifdef OPENSSL_SYS_WINDOWS
283 sz.i = sizeof(timeout);
284 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
285 (void*)&timeout, &sz.i) < 0)
286 { perror("getsockopt"); }
289 data->socket_timeout.tv_sec = timeout / 1000;
290 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
293 sz.i = sizeof(data->socket_timeout);
294 if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
295 &(data->socket_timeout), (void *)&sz) < 0)
296 { perror("getsockopt"); }
297 else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0)
298 OPENSSL_assert(sz.s<=sizeof(data->socket_timeout));
301 /* Get current time */
302 get_current_time(&timenow);
304 /* Calculate time left until timer expires */
305 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
306 timeleft.tv_sec -= timenow.tv_sec;
307 timeleft.tv_usec -= timenow.tv_usec;
308 if (timeleft.tv_usec < 0)
311 timeleft.tv_usec += 1000000;
314 if (timeleft.tv_sec < 0)
317 timeleft.tv_usec = 1;
320 /* Adjust socket timeout if next handhake message timer
321 * will expire earlier.
323 if ((data->socket_timeout.tv_sec == 0 && data->socket_timeout.tv_usec == 0) ||
324 (data->socket_timeout.tv_sec > timeleft.tv_sec) ||
325 (data->socket_timeout.tv_sec == timeleft.tv_sec &&
326 data->socket_timeout.tv_usec >= timeleft.tv_usec))
328 #ifdef OPENSSL_SYS_WINDOWS
329 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
330 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
331 (void*)&timeout, sizeof(timeout)) < 0)
332 { perror("setsockopt"); }
334 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
335 sizeof(struct timeval)) < 0)
336 { perror("setsockopt"); }
343 static void dgram_reset_rcv_timeout(BIO *b)
345 #if defined(SO_RCVTIMEO)
346 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
348 /* Is a timer active? */
349 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0)
351 #ifdef OPENSSL_SYS_WINDOWS
352 int timeout = data->socket_timeout.tv_sec * 1000 +
353 data->socket_timeout.tv_usec / 1000;
354 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
355 (void*)&timeout, sizeof(timeout)) < 0)
356 { perror("setsockopt"); }
358 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
359 sizeof(struct timeval)) < 0)
360 { 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>
375 union { size_t s; int i; } len;
378 struct sockaddr_in sa_in;
380 struct sockaddr_in6 sa_in6;
386 sa.len.i=sizeof(sa.peer);
390 clear_socket_error();
391 memset(&sa.peer, 0x00, sizeof(sa.peer));
392 dgram_adjust_rcv_timeout(b);
393 ret=recvfrom(b->num,out,outl,0,&sa.peer.sa,(void *)&sa.len);
394 if (sizeof(sa.len.i)!=sizeof(sa.len.s) && sa.len.i==0)
396 OPENSSL_assert(sa.len.s<=sizeof(sa.peer));
397 sa.len.i = (int)sa.len.s;
400 if ( ! data->connected && ret >= 0)
401 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
403 BIO_clear_retry_flags(b);
406 if (BIO_dgram_should_retry(ret))
408 BIO_set_retry_read(b);
409 data->_errno = get_last_socket_error();
413 dgram_reset_rcv_timeout(b);
418 static int dgram_write(BIO *b, const char *in, int inl)
421 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
422 clear_socket_error();
424 if ( data->connected )
425 ret=writesocket(b->num,in,inl);
428 int peerlen = sizeof(data->peer);
430 if (data->peer.sa.sa_family == AF_INET)
431 peerlen = sizeof(data->peer.sa_in);
433 else if (data->peer.sa.sa_family == AF_INET6)
434 peerlen = sizeof(data->peer.sa_in6);
436 #if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
437 ret=sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
439 ret=sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
443 BIO_clear_retry_flags(b);
446 if (BIO_dgram_should_retry(ret))
448 BIO_set_retry_write(b);
449 data->_errno = get_last_socket_error();
451 #if 0 /* higher layers are responsible for querying MTU, if necessary */
452 if ( data->_errno == EMSGSIZE)
453 /* retrieve the new MTU */
454 BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
461 static long dgram_get_mtu_overhead(bio_dgram_data *data)
465 switch (data->peer.sa.sa_family)
468 /* Assume this is UDP - 20 bytes for IP, 8 bytes for UDP */
473 #ifdef IN6_IS_ADDR_V4MAPPED
474 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
475 /* 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 */
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;
506 struct sockaddr_in6 s6;
511 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;
534 if (ip != NULL) *ip=b->num;
540 case BIO_CTRL_GET_CLOSE:
543 case BIO_CTRL_SET_CLOSE:
544 b->shutdown=(int)num;
546 case BIO_CTRL_PENDING:
547 case BIO_CTRL_WPENDING:
554 case BIO_CTRL_DGRAM_CONNECT:
555 to = (struct sockaddr *)ptr;
557 if (connect(b->num, to, sizeof(struct sockaddr)) < 0)
558 { perror("connect"); ret = 0; }
562 switch (to->sa_family)
565 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
569 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
573 memcpy(&data->peer,to,sizeof(data->peer.sa));
580 /* (Linux)kernel sets DF bit on outgoing IP packets */
581 case BIO_CTRL_DGRAM_MTU_DISCOVER:
582 #if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
583 addr_len = (socklen_t)sizeof(addr);
584 memset((void *)&addr, 0, sizeof(addr));
585 if (getsockname(b->num, &addr.sa, &addr_len) < 0)
590 switch (addr.sa.sa_family)
593 sockopt_val = IP_PMTUDISC_DO;
594 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
595 &sockopt_val, sizeof(sockopt_val))) < 0)
596 perror("setsockopt");
598 #if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
600 sockopt_val = IPV6_PMTUDISC_DO;
601 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
602 &sockopt_val, sizeof(sockopt_val))) < 0)
603 perror("setsockopt");
614 case BIO_CTRL_DGRAM_QUERY_MTU:
615 #if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
616 addr_len = (socklen_t)sizeof(addr);
617 memset((void *)&addr, 0, sizeof(addr));
618 if (getsockname(b->num, &addr.sa, &addr_len) < 0)
623 sockopt_len = sizeof(sockopt_val);
624 switch (addr.sa.sa_family)
627 if ((ret = getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
628 &sockopt_len)) < 0 || sockopt_val < 0)
634 /* we assume that the transport protocol is UDP and no
635 * IP options are used.
637 data->mtu = sockopt_val - 8 - 20;
641 #if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
643 if ((ret = getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU, (void *)&sockopt_val,
644 &sockopt_len)) < 0 || sockopt_val < 0)
650 /* we assume that the transport protocol is UDP and no
651 * IPV6 options are used.
653 data->mtu = sockopt_val - 8 - 40;
666 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
667 ret = -dgram_get_mtu_overhead(data);
668 switch (data->peer.sa.sa_family)
675 #ifdef IN6_IS_ADDR_V4MAPPED
676 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
688 case BIO_CTRL_DGRAM_GET_MTU:
691 case BIO_CTRL_DGRAM_SET_MTU:
695 case BIO_CTRL_DGRAM_SET_CONNECTED:
696 to = (struct sockaddr *)ptr;
701 switch (to->sa_family)
704 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
708 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
712 memcpy(&data->peer,to,sizeof(data->peer.sa));
719 memset(&(data->peer), 0x00, sizeof(data->peer));
722 case BIO_CTRL_DGRAM_GET_PEER:
723 switch (data->peer.sa.sa_family)
726 ret=sizeof(data->peer.sa_in);
730 ret=sizeof(data->peer.sa_in6);
734 ret=sizeof(data->peer.sa);
737 if (num==0 || num>ret)
739 memcpy(ptr,&data->peer,(ret=num));
741 case BIO_CTRL_DGRAM_SET_PEER:
742 to = (struct sockaddr *) ptr;
743 switch (to->sa_family)
746 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
750 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
754 memcpy(&data->peer,to,sizeof(data->peer.sa));
758 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
759 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
761 #if defined(SO_RCVTIMEO)
762 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
763 #ifdef OPENSSL_SYS_WINDOWS
765 struct timeval *tv = (struct timeval *)ptr;
766 int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
767 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
768 (void*)&timeout, sizeof(timeout)) < 0)
769 { perror("setsockopt"); ret = -1; }
772 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
773 sizeof(struct timeval)) < 0)
774 { perror("setsockopt"); ret = -1; }
777 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
779 union { size_t s; int i; } sz = {0};
780 #ifdef OPENSSL_SYS_WINDOWS
782 struct timeval *tv = (struct timeval *)ptr;
784 sz.i = sizeof(timeout);
785 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
786 (void*)&timeout, &sz.i) < 0)
787 { perror("getsockopt"); ret = -1; }
790 tv->tv_sec = timeout / 1000;
791 tv->tv_usec = (timeout % 1000) * 1000;
795 sz.i = sizeof(struct timeval);
796 if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
797 ptr, (void *)&sz) < 0)
798 { perror("getsockopt"); ret = -1; }
799 else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0)
801 OPENSSL_assert(sz.s<=sizeof(struct timeval));
810 #if defined(SO_SNDTIMEO)
811 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
812 #ifdef OPENSSL_SYS_WINDOWS
814 struct timeval *tv = (struct timeval *)ptr;
815 int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
816 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
817 (void*)&timeout, sizeof(timeout)) < 0)
818 { perror("setsockopt"); ret = -1; }
821 if ( setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
822 sizeof(struct timeval)) < 0)
823 { perror("setsockopt"); ret = -1; }
826 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
828 union { size_t s; int i; } sz = {0};
829 #ifdef OPENSSL_SYS_WINDOWS
831 struct timeval *tv = (struct timeval *)ptr;
833 sz.i = sizeof(timeout);
834 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
835 (void*)&timeout, &sz.i) < 0)
836 { perror("getsockopt"); ret = -1; }
839 tv->tv_sec = timeout / 1000;
840 tv->tv_usec = (timeout % 1000) * 1000;
844 sz.i = sizeof(struct timeval);
845 if ( getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
846 ptr, (void *)&sz) < 0)
847 { perror("getsockopt"); ret = -1; }
848 else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0)
850 OPENSSL_assert(sz.s<=sizeof(struct timeval));
859 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
861 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
862 #ifdef OPENSSL_SYS_WINDOWS
863 if ( data->_errno == WSAETIMEDOUT)
865 if ( data->_errno == EAGAIN)
875 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
876 if ( data->_errno == EMSGSIZE)
885 case BIO_CTRL_DGRAM_SET_DONT_FRAG:
886 sockopt_val = num ? 1 : 0;
888 switch (data->peer.sa.sa_family)
891 #if defined(IP_DONTFRAG)
892 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG,
893 &sockopt_val, sizeof(sockopt_val))) < 0)
894 { perror("setsockopt"); ret = -1; }
895 #elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTUDISCOVER)
896 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
897 (ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
898 &sockopt_val, sizeof(sockopt_val))) < 0)
899 { perror("setsockopt"); ret = -1; }
900 #elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT)
901 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT,
902 (const char *)&sockopt_val, sizeof(sockopt_val))) < 0)
903 { perror("setsockopt"); ret = -1; }
910 #if defined(IPV6_DONTFRAG)
911 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
912 (const void *)&sockopt_val, sizeof(sockopt_val))) < 0)
913 { perror("setsockopt"); ret = -1; }
914 #elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER)
915 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
916 (ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
917 &sockopt_val, sizeof(sockopt_val))) < 0)
918 { perror("setsockopt"); ret = -1; }
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());
972 if (bio == NULL) return(NULL);
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;
977 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk));
978 OPENSSL_assert(ret >= 0);
979 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
980 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk));
981 OPENSSL_assert(ret >= 0);
983 /* Test if activation was successful. When using accept(),
984 * SCTP-AUTH has to be activated for the listening socket
985 * already, otherwise the connected socket won't use it. */
986 sockopt_len = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
987 authchunks = OPENSSL_malloc(sockopt_len);
988 memset(authchunks, 0, sockopt_len);
989 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks, &sockopt_len);
990 OPENSSL_assert(ret >= 0);
992 for (p = (unsigned char*) authchunks->gauth_chunks;
993 p < (unsigned char*) authchunks + sockopt_len;
994 p += sizeof(uint8_t))
996 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1;
997 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1;
1000 OPENSSL_free(authchunks);
1002 OPENSSL_assert(auth_data);
1003 OPENSSL_assert(auth_forward);
1005 #ifdef SCTP_AUTHENTICATION_EVENT
1007 memset(&event, 0, sizeof(struct sctp_event));
1008 event.se_assoc_id = 0;
1009 event.se_type = SCTP_AUTHENTICATION_EVENT;
1011 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1012 OPENSSL_assert(ret >= 0);
1014 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
1015 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
1016 OPENSSL_assert(ret >= 0);
1018 event.sctp_authentication_event = 1;
1020 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1021 OPENSSL_assert(ret >= 0);
1025 /* Disable partial delivery by setting the min size
1026 * larger than the max record size of 2^14 + 2048 + 13
1028 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval, sizeof(optval));
1029 OPENSSL_assert(ret >= 0);
1034 int BIO_dgram_is_sctp(BIO *bio)
1036 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
1039 static int dgram_sctp_new(BIO *bi)
1041 bio_dgram_sctp_data *data = NULL;
1045 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
1048 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
1049 #ifdef SCTP_PR_SCTP_NONE
1050 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1058 static int dgram_sctp_free(BIO *a)
1060 bio_dgram_sctp_data *data;
1062 if (a == NULL) return(0);
1063 if ( ! dgram_clear(a))
1066 data = (bio_dgram_sctp_data *)a->ptr;
1067 if(data != NULL) OPENSSL_free(data);
1072 #ifdef SCTP_AUTHENTICATION_EVENT
1073 void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp)
1076 struct sctp_authkey_event* authkeyevent = &snp->sn_auth_event;
1078 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY)
1080 struct sctp_authkeyid authkeyid;
1083 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1084 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1085 &authkeyid, sizeof(struct sctp_authkeyid));
1090 static int dgram_sctp_read(BIO *b, char *out, int outl)
1092 int ret = 0, n = 0, i, optval;
1094 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1095 union sctp_notification *snp;
1098 struct cmsghdr *cmsg;
1103 clear_socket_error();
1107 memset(&data->rcvinfo, 0x00, sizeof(struct bio_dgram_sctp_rcvinfo));
1110 msg.msg_name = NULL;
1111 msg.msg_namelen = 0;
1114 msg.msg_control = cmsgbuf;
1115 msg.msg_controllen = 512;
1117 n = recvmsg(b->num, &msg, 0);
1126 if (msg.msg_controllen > 0)
1128 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg))
1130 if (cmsg->cmsg_level != IPPROTO_SCTP)
1133 if (cmsg->cmsg_type == SCTP_RCVINFO)
1135 struct sctp_rcvinfo *rcvinfo;
1137 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1138 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1139 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1140 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1141 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1142 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1143 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1144 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1148 if (cmsg->cmsg_type == SCTP_SNDRCV)
1150 struct sctp_sndrcvinfo *sndrcvinfo;
1152 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1153 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1154 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1155 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1156 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1157 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1158 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1159 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1165 if (msg.msg_flags & MSG_NOTIFICATION)
1167 snp = (union sctp_notification*) out;
1168 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT)
1171 struct sctp_event event;
1173 struct sctp_event_subscribe event;
1174 socklen_t eventsize;
1176 /* If a message has been delayed until the socket
1177 * is dry, it can be sent now.
1179 if (data->saved_message.length > 0)
1181 dgram_sctp_write(data->saved_message.bio, data->saved_message.data,
1182 data->saved_message.length);
1183 OPENSSL_free(data->saved_message.data);
1184 data->saved_message.length = 0;
1187 /* disable sender dry event */
1189 memset(&event, 0, sizeof(struct sctp_event));
1190 event.se_assoc_id = 0;
1191 event.se_type = SCTP_SENDER_DRY_EVENT;
1193 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1194 OPENSSL_assert(i >= 0);
1196 eventsize = sizeof(struct sctp_event_subscribe);
1197 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1198 OPENSSL_assert(i >= 0);
1200 event.sctp_sender_dry_event = 0;
1202 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1203 OPENSSL_assert(i >= 0);
1207 #ifdef SCTP_AUTHENTICATION_EVENT
1208 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1209 dgram_sctp_handle_auth_free_key_event(b, snp);
1212 if (data->handle_notifications != NULL)
1213 data->handle_notifications(b, data->notification_context, (void*) out);
1215 memset(out, 0, outl);
1220 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR) && (ret < outl));
1222 if (ret > 0 && !(msg.msg_flags & MSG_EOR))
1224 /* Partial message read, this should never happen! */
1226 /* The buffer was too small, this means the peer sent
1227 * a message that was larger than allowed. */
1231 /* Test if socket buffer can handle max record
1232 * size (2^14 + 2048 + 13)
1234 optlen = (socklen_t) sizeof(int);
1235 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1236 OPENSSL_assert(ret >= 0);
1237 OPENSSL_assert(optval >= 18445);
1239 /* Test if SCTP doesn't partially deliver below
1240 * max record size (2^14 + 2048 + 13)
1242 optlen = (socklen_t) sizeof(int);
1243 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1245 OPENSSL_assert(ret >= 0);
1246 OPENSSL_assert(optval >= 18445);
1248 /* Partially delivered notification??? Probably a bug.... */
1249 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1251 /* Everything seems ok till now, so it's most likely
1252 * a message dropped by PR-SCTP.
1254 memset(out, 0, outl);
1255 BIO_set_retry_read(b);
1259 BIO_clear_retry_flags(b);
1262 if (BIO_dgram_should_retry(ret))
1264 BIO_set_retry_read(b);
1265 data->_errno = get_last_socket_error();
1269 /* Test if peer uses SCTP-AUTH before continuing */
1270 if (!data->peer_auth_tested)
1272 int ii, auth_data = 0, auth_forward = 0;
1274 struct sctp_authchunks *authchunks;
1276 optlen = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1277 authchunks = OPENSSL_malloc(optlen);
1278 memset(authchunks, 0, optlen);
1279 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS, authchunks, &optlen);
1280 OPENSSL_assert(ii >= 0);
1282 for (p = (unsigned char*) authchunks->gauth_chunks;
1283 p < (unsigned char*) authchunks + optlen;
1284 p += sizeof(uint8_t))
1286 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1;
1287 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1;
1290 OPENSSL_free(authchunks);
1292 if (!auth_data || !auth_forward)
1294 BIOerr(BIO_F_DGRAM_SCTP_READ,BIO_R_CONNECT_ERROR);
1298 data->peer_auth_tested = 1;
1304 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1307 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1308 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1309 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1310 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1311 struct iovec iov[1];
1313 struct cmsghdr *cmsg;
1314 #if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1315 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) + CMSG_SPACE(sizeof(struct sctp_prinfo))];
1316 struct sctp_sndinfo *sndinfo;
1317 struct sctp_prinfo *prinfo;
1319 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1320 struct sctp_sndrcvinfo *sndrcvinfo;
1323 clear_socket_error();
1325 /* If we're send anything else than application data,
1326 * disable all user parameters and flags.
1329 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1330 #ifdef SCTP_SACK_IMMEDIATELY
1331 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1333 sinfo = &handshake_sinfo;
1336 /* If we have to send a shutdown alert message and the
1337 * socket is not dry yet, we have to save it and send it
1338 * as soon as the socket gets dry.
1340 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b))
1342 data->saved_message.bio = b;
1343 data->saved_message.length = inl;
1344 data->saved_message.data = OPENSSL_malloc(inl);
1345 memcpy(data->saved_message.data, in, inl);
1349 iov[0].iov_base = (char *)in;
1350 iov[0].iov_len = inl;
1351 msg.msg_name = NULL;
1352 msg.msg_namelen = 0;
1355 msg.msg_control = (caddr_t)cmsgbuf;
1356 msg.msg_controllen = 0;
1358 #if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1359 cmsg = (struct cmsghdr *)cmsgbuf;
1360 cmsg->cmsg_level = IPPROTO_SCTP;
1361 cmsg->cmsg_type = SCTP_SNDINFO;
1362 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1363 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1364 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1365 sndinfo->snd_sid = sinfo->snd_sid;
1366 sndinfo->snd_flags = sinfo->snd_flags;
1367 sndinfo->snd_ppid = sinfo->snd_ppid;
1368 sndinfo->snd_context = sinfo->snd_context;
1369 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1371 cmsg = (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1372 cmsg->cmsg_level = IPPROTO_SCTP;
1373 cmsg->cmsg_type = SCTP_PRINFO;
1374 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1375 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1376 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1377 prinfo->pr_policy = pinfo->pr_policy;
1378 prinfo->pr_value = pinfo->pr_value;
1379 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1381 cmsg = (struct cmsghdr *)cmsgbuf;
1382 cmsg->cmsg_level = IPPROTO_SCTP;
1383 cmsg->cmsg_type = SCTP_SNDRCV;
1384 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1385 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1386 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1387 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1388 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1390 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1392 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1393 sndrcvinfo->sinfo_context = sinfo->snd_context;
1394 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1395 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1398 ret = sendmsg(b->num, &msg, 0);
1400 BIO_clear_retry_flags(b);
1403 if (BIO_dgram_should_retry(ret))
1405 BIO_set_retry_write(b);
1406 data->_errno = get_last_socket_error();
1412 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1415 bio_dgram_sctp_data *data = NULL;
1416 socklen_t sockopt_len = 0;
1417 struct sctp_authkeyid authkeyid;
1418 struct sctp_authkey *authkey = NULL;
1420 data = (bio_dgram_sctp_data *)b->ptr;
1424 case BIO_CTRL_DGRAM_QUERY_MTU:
1425 /* Set to maximum (2^14)
1426 * and ignore user input to enable transport
1427 * protocol fragmentation.
1428 * Returns always 2^14.
1433 case BIO_CTRL_DGRAM_SET_MTU:
1434 /* Set to maximum (2^14)
1435 * and ignore input to enable transport
1436 * protocol fragmentation.
1437 * Returns always 2^14.
1442 case BIO_CTRL_DGRAM_SET_CONNECTED:
1443 case BIO_CTRL_DGRAM_CONNECT:
1444 /* Returns always -1. */
1447 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1448 /* SCTP doesn't need the DTLS timer
1452 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1453 /* We allow transport protocol fragmentation so this is irrelevant */
1456 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1458 data->in_handshake = 1;
1460 data->in_handshake = 0;
1462 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY, &data->in_handshake, sizeof(int));
1464 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1465 /* New shared key for SCTP AUTH.
1466 * Returns 0 on success, -1 otherwise.
1469 /* Get active key */
1470 sockopt_len = sizeof(struct sctp_authkeyid);
1471 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1475 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1476 authkey = OPENSSL_malloc(sockopt_len);
1477 if (authkey == NULL)
1482 memset(authkey, 0x00, sockopt_len);
1483 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1485 /* This field is missing in FreeBSD 8.2 and earlier,
1486 * and FreeBSD 8.3 and higher work without it.
1488 authkey->sca_keylength = 64;
1490 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1492 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey, sockopt_len);
1493 OPENSSL_free(authkey);
1497 /* Reset active key */
1498 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1499 &authkeyid, sizeof(struct sctp_authkeyid));
1503 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1504 /* Returns 0 on success, -1 otherwise. */
1506 /* Get active key */
1507 sockopt_len = sizeof(struct sctp_authkeyid);
1508 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1511 /* Set active key */
1512 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1513 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1514 &authkeyid, sizeof(struct sctp_authkeyid));
1517 /* CCS has been sent, so remember that and fall through
1518 * to check if we need to deactivate an old key
1522 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1523 /* Returns 0 on success, -1 otherwise. */
1525 /* Has this command really been called or is this just a fall-through? */
1526 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1529 /* CSS has been both, received and sent, so deactivate an old key */
1530 if (data->ccs_rcvd == 1 && data->ccs_sent == 1)
1532 /* Get active key */
1533 sockopt_len = sizeof(struct sctp_authkeyid);
1534 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1537 /* Deactivate key or delete second last key if
1538 * SCTP_AUTHENTICATION_EVENT is not available.
1540 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1541 #ifdef SCTP_AUTH_DEACTIVATE_KEY
1542 sockopt_len = sizeof(struct sctp_authkeyid);
1543 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1544 &authkeyid, sockopt_len);
1547 #ifndef SCTP_AUTHENTICATION_EVENT
1548 if (authkeyid.scact_keynumber > 0)
1550 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1551 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1552 &authkeyid, sizeof(struct sctp_authkeyid));
1561 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1562 /* Returns the size of the copied struct. */
1563 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo))
1564 num = sizeof(struct bio_dgram_sctp_sndinfo);
1566 memcpy(ptr, &(data->sndinfo), num);
1569 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1570 /* Returns the size of the copied struct. */
1571 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo))
1572 num = sizeof(struct bio_dgram_sctp_sndinfo);
1574 memcpy(&(data->sndinfo), ptr, num);
1576 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1577 /* Returns the size of the copied struct. */
1578 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo))
1579 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1581 memcpy(ptr, &data->rcvinfo, num);
1585 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1586 /* Returns the size of the copied struct. */
1587 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo))
1588 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1590 memcpy(&(data->rcvinfo), ptr, num);
1592 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1593 /* Returns the size of the copied struct. */
1594 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo))
1595 num = sizeof(struct bio_dgram_sctp_prinfo);
1597 memcpy(ptr, &(data->prinfo), num);
1600 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1601 /* Returns the size of the copied struct. */
1602 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo))
1603 num = sizeof(struct bio_dgram_sctp_prinfo);
1605 memcpy(&(data->prinfo), ptr, num);
1607 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1608 /* Returns always 1. */
1610 data->save_shutdown = 1;
1612 data->save_shutdown = 0;
1616 /* Pass to default ctrl function to
1617 * process SCTP unspecific commands
1619 ret=dgram_ctrl(b, cmd, num, ptr);
1625 int BIO_dgram_sctp_notification_cb(BIO *b,
1626 void (*handle_notifications)(BIO *bio, void *context, void *buf),
1629 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1631 if (handle_notifications != NULL)
1633 data->handle_notifications = handle_notifications;
1634 data->notification_context = context;
1642 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1645 int n, sockflags, ret;
1646 union sctp_notification snp;
1650 struct sctp_event event;
1652 struct sctp_event_subscribe event;
1653 socklen_t eventsize;
1655 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1657 /* set sender dry event */
1659 memset(&event, 0, sizeof(struct sctp_event));
1660 event.se_assoc_id = 0;
1661 event.se_type = SCTP_SENDER_DRY_EVENT;
1663 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1665 eventsize = sizeof(struct sctp_event_subscribe);
1666 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1670 event.sctp_sender_dry_event = 1;
1672 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1677 /* peek for notification */
1678 memset(&snp, 0x00, sizeof(union sctp_notification));
1679 iov.iov_base = (char *)&snp;
1680 iov.iov_len = sizeof(union sctp_notification);
1681 msg.msg_name = NULL;
1682 msg.msg_namelen = 0;
1685 msg.msg_control = NULL;
1686 msg.msg_controllen = 0;
1689 n = recvmsg(b->num, &msg, MSG_PEEK);
1692 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1698 /* if we find a notification, process it and try again if necessary */
1699 while (msg.msg_flags & MSG_NOTIFICATION)
1701 memset(&snp, 0x00, sizeof(union sctp_notification));
1702 iov.iov_base = (char *)&snp;
1703 iov.iov_len = sizeof(union sctp_notification);
1704 msg.msg_name = NULL;
1705 msg.msg_namelen = 0;
1708 msg.msg_control = NULL;
1709 msg.msg_controllen = 0;
1712 n = recvmsg(b->num, &msg, 0);
1715 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1721 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT)
1725 /* disable sender dry event */
1727 memset(&event, 0, sizeof(struct sctp_event));
1728 event.se_assoc_id = 0;
1729 event.se_type = SCTP_SENDER_DRY_EVENT;
1731 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1733 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1734 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1738 event.sctp_sender_dry_event = 0;
1740 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1746 #ifdef SCTP_AUTHENTICATION_EVENT
1747 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1748 dgram_sctp_handle_auth_free_key_event(b, &snp);
1751 if (data->handle_notifications != NULL)
1752 data->handle_notifications(b, data->notification_context, (void*) &snp);
1754 /* found notification, peek again */
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 /* if we have seen the dry already, don't wait */
1769 sockflags = fcntl(b->num, F_GETFL, 0);
1770 fcntl(b->num, F_SETFL, O_NONBLOCK);
1773 n = recvmsg(b->num, &msg, MSG_PEEK);
1777 fcntl(b->num, F_SETFL, sockflags);
1782 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1789 /* read anything else */
1793 int BIO_dgram_sctp_msg_waiting(BIO *b)
1796 union sctp_notification snp;
1799 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1801 /* Check if there are any messages waiting to be read */
1804 memset(&snp, 0x00, sizeof(union sctp_notification));
1805 iov.iov_base = (char *)&snp;
1806 iov.iov_len = sizeof(union sctp_notification);
1807 msg.msg_name = NULL;
1808 msg.msg_namelen = 0;
1811 msg.msg_control = NULL;
1812 msg.msg_controllen = 0;
1815 sockflags = fcntl(b->num, F_GETFL, 0);
1816 fcntl(b->num, F_SETFL, O_NONBLOCK);
1817 n = recvmsg(b->num, &msg, MSG_PEEK);
1818 fcntl(b->num, F_SETFL, sockflags);
1820 /* if notification, process and try again */
1821 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION))
1823 #ifdef SCTP_AUTHENTICATION_EVENT
1824 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1825 dgram_sctp_handle_auth_free_key_event(b, &snp);
1828 memset(&snp, 0x00, sizeof(union sctp_notification));
1829 iov.iov_base = (char *)&snp;
1830 iov.iov_len = sizeof(union sctp_notification);
1831 msg.msg_name = NULL;
1832 msg.msg_namelen = 0;
1835 msg.msg_control = NULL;
1836 msg.msg_controllen = 0;
1838 n = recvmsg(b->num, &msg, 0);
1840 if (data->handle_notifications != NULL)
1841 data->handle_notifications(b, data->notification_context, (void*) &snp);
1844 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1846 /* Return 1 if there is a message to be read, return 0 otherwise. */
1853 static int dgram_sctp_puts(BIO *bp, const char *str)
1858 ret=dgram_sctp_write(bp,str,n);
1863 static int BIO_dgram_should_retry(int i)
1867 if ((i == 0) || (i == -1))
1869 err=get_last_socket_error();
1871 #if defined(OPENSSL_SYS_WINDOWS)
1872 /* If the socket return value (i) is -1
1873 * and err is unexpectedly 0 at this point,
1874 * the error code was overwritten by
1875 * another system call before this error
1876 * handling is called.
1880 return(BIO_dgram_non_fatal_error(err));
1885 int BIO_dgram_non_fatal_error(int err)
1889 #if defined(OPENSSL_SYS_WINDOWS)
1890 # if defined(WSAEWOULDBLOCK)
1891 case WSAEWOULDBLOCK:
1894 # if 0 /* This appears to always be an error */
1895 # if defined(WSAENOTCONN)
1902 # ifdef WSAEWOULDBLOCK
1903 # if WSAEWOULDBLOCK != EWOULDBLOCK
1916 #if EWOULDBLOCK != EAGAIN
1941 static void get_current_time(struct timeval *t)
1945 union { unsigned __int64 ul; FILETIME ft; } now;
1948 SystemTimeToFileTime(&st,&now.ft);
1950 now.ul -= 116444736000000000ULL;
1952 now.ul -= 116444736000000000UI64; /* re-bias to 1/1/1970 */
1954 t->tv_sec = (long)(now.ul/10000000);
1955 t->tv_usec = ((int)(now.ul%10000000))/10;
1956 #elif defined(OPENSSL_SYS_VMS)
1959 t->tv_sec = (long)tb.time;
1960 t->tv_usec = (long)tb.millitm * 1000;
1962 gettimeofday(t, NULL);