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_WIN32) || 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_ctrl(BIO *b, int cmd, long num, void *ptr)
465 struct sockaddr *to = NULL;
466 bio_dgram_data *data = NULL;
468 #if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
469 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
470 * modern enough to define socklen_t */
474 struct sockaddr_in s4;
476 struct sockaddr_in6 s6;
481 data = (bio_dgram_data *)b->ptr;
487 case BIO_C_FILE_SEEK:
490 case BIO_C_FILE_TELL:
496 b->num= *((int *)ptr);
497 b->shutdown=(int)num;
504 if (ip != NULL) *ip=b->num;
510 case BIO_CTRL_GET_CLOSE:
513 case BIO_CTRL_SET_CLOSE:
514 b->shutdown=(int)num;
516 case BIO_CTRL_PENDING:
517 case BIO_CTRL_WPENDING:
524 case BIO_CTRL_DGRAM_CONNECT:
525 to = (struct sockaddr *)ptr;
527 if (connect(b->num, to, sizeof(struct sockaddr)) < 0)
528 { perror("connect"); ret = 0; }
532 switch (to->sa_family)
535 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
539 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
543 memcpy(&data->peer,to,sizeof(data->peer.sa));
550 /* (Linux)kernel sets DF bit on outgoing IP packets */
551 case BIO_CTRL_DGRAM_MTU_DISCOVER:
552 #if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
553 addr_len = (socklen_t)sizeof(addr);
554 memset((void *)&addr, 0, sizeof(addr));
555 if (getsockname(b->num, &addr.sa, &addr_len) < 0)
560 switch (addr.sa.sa_family)
563 sockopt_val = IP_PMTUDISC_DO;
564 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
565 &sockopt_val, sizeof(sockopt_val))) < 0)
566 perror("setsockopt");
568 #if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
570 sockopt_val = IPV6_PMTUDISC_DO;
571 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
572 &sockopt_val, sizeof(sockopt_val))) < 0)
573 perror("setsockopt");
584 case BIO_CTRL_DGRAM_QUERY_MTU:
585 #if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
586 addr_len = (socklen_t)sizeof(addr);
587 memset((void *)&addr, 0, sizeof(addr));
588 if (getsockname(b->num, &addr.sa, &addr_len) < 0)
593 sockopt_len = sizeof(sockopt_val);
594 switch (addr.sa.sa_family)
597 if ((ret = getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
598 &sockopt_len)) < 0 || sockopt_val < 0)
604 /* we assume that the transport protocol is UDP and no
605 * IP options are used.
607 data->mtu = sockopt_val - 8 - 20;
611 #if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
613 if ((ret = getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU, (void *)&sockopt_val,
614 &sockopt_len)) < 0 || sockopt_val < 0)
620 /* we assume that the transport protocol is UDP and no
621 * IPV6 options are used.
623 data->mtu = sockopt_val - 8 - 40;
636 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
637 switch (data->peer.sa.sa_family)
644 #ifdef IN6_IS_ADDR_V4MAPPED
645 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
657 case BIO_CTRL_DGRAM_GET_MTU:
660 case BIO_CTRL_DGRAM_SET_MTU:
664 case BIO_CTRL_DGRAM_SET_CONNECTED:
665 to = (struct sockaddr *)ptr;
670 switch (to->sa_family)
673 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
677 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
681 memcpy(&data->peer,to,sizeof(data->peer.sa));
688 memset(&(data->peer), 0x00, sizeof(data->peer));
691 case BIO_CTRL_DGRAM_GET_PEER:
692 switch (data->peer.sa.sa_family)
695 ret=sizeof(data->peer.sa_in);
699 ret=sizeof(data->peer.sa_in6);
703 ret=sizeof(data->peer.sa);
706 if (num==0 || num>ret)
708 memcpy(ptr,&data->peer,(ret=num));
710 case BIO_CTRL_DGRAM_SET_PEER:
711 to = (struct sockaddr *) ptr;
712 switch (to->sa_family)
715 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
719 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
723 memcpy(&data->peer,to,sizeof(data->peer.sa));
727 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
728 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
730 #if defined(SO_RCVTIMEO)
731 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
732 #ifdef OPENSSL_SYS_WINDOWS
734 struct timeval *tv = (struct timeval *)ptr;
735 int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
736 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
737 (void*)&timeout, sizeof(timeout)) < 0)
738 { perror("setsockopt"); ret = -1; }
741 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
742 sizeof(struct timeval)) < 0)
743 { perror("setsockopt"); ret = -1; }
746 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
748 union { size_t s; int i; } sz = {0};
749 #ifdef OPENSSL_SYS_WINDOWS
751 struct timeval *tv = (struct timeval *)ptr;
753 sz.i = sizeof(timeout);
754 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
755 (void*)&timeout, &sz.i) < 0)
756 { perror("getsockopt"); ret = -1; }
759 tv->tv_sec = timeout / 1000;
760 tv->tv_usec = (timeout % 1000) * 1000;
764 sz.i = sizeof(struct timeval);
765 if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
766 ptr, (void *)&sz) < 0)
767 { perror("getsockopt"); ret = -1; }
768 else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0)
770 OPENSSL_assert(sz.s<=sizeof(struct timeval));
779 #if defined(SO_SNDTIMEO)
780 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
781 #ifdef OPENSSL_SYS_WINDOWS
783 struct timeval *tv = (struct timeval *)ptr;
784 int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
785 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
786 (void*)&timeout, sizeof(timeout)) < 0)
787 { perror("setsockopt"); ret = -1; }
790 if ( setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
791 sizeof(struct timeval)) < 0)
792 { perror("setsockopt"); ret = -1; }
795 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
797 union { size_t s; int i; } sz = {0};
798 #ifdef OPENSSL_SYS_WINDOWS
800 struct timeval *tv = (struct timeval *)ptr;
802 sz.i = sizeof(timeout);
803 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
804 (void*)&timeout, &sz.i) < 0)
805 { perror("getsockopt"); ret = -1; }
808 tv->tv_sec = timeout / 1000;
809 tv->tv_usec = (timeout % 1000) * 1000;
813 sz.i = sizeof(struct timeval);
814 if ( getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
815 ptr, (void *)&sz) < 0)
816 { perror("getsockopt"); ret = -1; }
817 else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0)
819 OPENSSL_assert(sz.s<=sizeof(struct timeval));
828 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
830 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
831 #ifdef OPENSSL_SYS_WINDOWS
832 if ( data->_errno == WSAETIMEDOUT)
834 if ( data->_errno == EAGAIN)
844 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
845 if ( data->_errno == EMSGSIZE)
854 case BIO_CTRL_DGRAM_SET_DONT_FRAG:
855 sockopt_val = num ? 1 : 0;
857 switch (data->peer.sa.sa_family)
860 #if defined(IP_DONTFRAG)
861 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG,
862 &sockopt_val, sizeof(sockopt_val))) < 0)
863 { perror("setsockopt"); ret = -1; }
864 #elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTUDISCOVER)
865 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
866 (ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
867 &sockopt_val, sizeof(sockopt_val))) < 0)
868 { perror("setsockopt"); ret = -1; }
869 #elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT)
870 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT,
871 (const char *)&sockopt_val, sizeof(sockopt_val))) < 0)
872 { perror("setsockopt"); ret = -1; }
879 #if defined(IPV6_DONTFRAG)
880 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
881 (const void *)&sockopt_val, sizeof(sockopt_val))) < 0)
882 { perror("setsockopt"); ret = -1; }
883 #elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER)
884 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
885 (ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
886 &sockopt_val, sizeof(sockopt_val))) < 0)
887 { perror("setsockopt"); ret = -1; }
905 static int dgram_puts(BIO *bp, const char *str)
910 ret=dgram_write(bp,str,n);
914 #ifndef OPENSSL_NO_SCTP
915 BIO_METHOD *BIO_s_datagram_sctp(void)
917 return(&methods_dgramp_sctp);
920 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
923 int ret, optval = 20000;
924 int auth_data = 0, auth_forward = 0;
926 struct sctp_authchunk auth;
927 struct sctp_authchunks *authchunks;
928 socklen_t sockopt_len;
929 #ifdef SCTP_AUTHENTICATION_EVENT
931 struct sctp_event event;
933 struct sctp_event_subscribe event;
937 bio=BIO_new(BIO_s_datagram_sctp());
938 if (bio == NULL) return(NULL);
939 BIO_set_fd(bio,fd,close_flag);
941 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
942 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
943 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk));
944 OPENSSL_assert(ret >= 0);
945 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
946 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk));
947 OPENSSL_assert(ret >= 0);
949 /* Test if activation was successful. When using accept(),
950 * SCTP-AUTH has to be activated for the listening socket
951 * already, otherwise the connected socket won't use it. */
952 sockopt_len = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
953 authchunks = OPENSSL_malloc(sockopt_len);
954 memset(authchunks, 0, sizeof(sockopt_len));
955 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks, &sockopt_len);
956 OPENSSL_assert(ret >= 0);
958 for (p = (unsigned char*) authchunks + sizeof(sctp_assoc_t);
959 p < (unsigned char*) authchunks + sockopt_len;
960 p += sizeof(uint8_t))
962 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1;
963 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1;
966 OPENSSL_free(authchunks);
968 OPENSSL_assert(auth_data);
969 OPENSSL_assert(auth_forward);
971 #ifdef SCTP_AUTHENTICATION_EVENT
973 memset(&event, 0, sizeof(struct sctp_event));
974 event.se_assoc_id = 0;
975 event.se_type = SCTP_AUTHENTICATION_EVENT;
977 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
978 OPENSSL_assert(ret >= 0);
980 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
981 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
982 OPENSSL_assert(ret >= 0);
984 event.sctp_authentication_event = 1;
986 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
987 OPENSSL_assert(ret >= 0);
991 /* Disable partial delivery by setting the min size
992 * larger than the max record size of 2^14 + 2048 + 13
994 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval, sizeof(optval));
995 OPENSSL_assert(ret >= 0);
1000 int BIO_dgram_is_sctp(BIO *bio)
1002 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
1005 static int dgram_sctp_new(BIO *bi)
1007 bio_dgram_sctp_data *data = NULL;
1011 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
1014 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
1015 #ifdef SCTP_PR_SCTP_NONE
1016 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1024 static int dgram_sctp_free(BIO *a)
1026 bio_dgram_sctp_data *data;
1028 if (a == NULL) return(0);
1029 if ( ! dgram_clear(a))
1032 data = (bio_dgram_sctp_data *)a->ptr;
1033 if(data != NULL) OPENSSL_free(data);
1038 #ifdef SCTP_AUTHENTICATION_EVENT
1039 void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp)
1042 struct sctp_authkey_event* authkeyevent = &snp->sn_auth_event;
1044 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY)
1046 struct sctp_authkeyid authkeyid;
1049 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1050 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1051 &authkeyid, sizeof(struct sctp_authkeyid));
1056 static int dgram_sctp_read(BIO *b, char *out, int outl)
1058 int ret = 0, n = 0, i, optval;
1060 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1061 union sctp_notification *snp;
1064 struct cmsghdr *cmsg;
1069 clear_socket_error();
1073 memset(&data->rcvinfo, 0x00, sizeof(struct bio_dgram_sctp_rcvinfo));
1076 msg.msg_name = NULL;
1077 msg.msg_namelen = 0;
1080 msg.msg_control = cmsgbuf;
1081 msg.msg_controllen = 512;
1083 n = recvmsg(b->num, &msg, 0);
1085 if (msg.msg_controllen > 0)
1087 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg))
1089 if (cmsg->cmsg_level != IPPROTO_SCTP)
1092 if (cmsg->cmsg_type == SCTP_RCVINFO)
1094 struct sctp_rcvinfo *rcvinfo;
1096 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1097 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1098 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1099 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1100 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1101 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1102 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1103 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1107 if (cmsg->cmsg_type == SCTP_SNDRCV)
1109 struct sctp_sndrcvinfo *sndrcvinfo;
1111 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1112 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1113 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1114 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1115 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1116 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1117 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1118 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1131 if (msg.msg_flags & MSG_NOTIFICATION)
1133 snp = (union sctp_notification*) out;
1134 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT)
1137 struct sctp_event event;
1139 struct sctp_event_subscribe event;
1140 socklen_t eventsize;
1142 /* If a message has been delayed until the socket
1143 * is dry, it can be sent now.
1145 if (data->saved_message.length > 0)
1147 dgram_sctp_write(data->saved_message.bio, data->saved_message.data,
1148 data->saved_message.length);
1149 OPENSSL_free(data->saved_message.data);
1150 data->saved_message.length = 0;
1153 /* disable sender dry event */
1155 memset(&event, 0, sizeof(struct sctp_event));
1156 event.se_assoc_id = 0;
1157 event.se_type = SCTP_SENDER_DRY_EVENT;
1159 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1160 OPENSSL_assert(i >= 0);
1162 eventsize = sizeof(struct sctp_event_subscribe);
1163 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1164 OPENSSL_assert(i >= 0);
1166 event.sctp_sender_dry_event = 0;
1168 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1169 OPENSSL_assert(i >= 0);
1173 #ifdef SCTP_AUTHENTICATION_EVENT
1174 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1175 dgram_sctp_handle_auth_free_key_event(b, snp);
1178 if (data->handle_notifications != NULL)
1179 data->handle_notifications(b, data->notification_context, (void*) out);
1181 memset(out, 0, outl);
1186 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR) && (ret < outl));
1188 if (ret > 0 && !(msg.msg_flags & MSG_EOR))
1190 /* Partial message read, this should never happen! */
1192 /* The buffer was too small, this means the peer sent
1193 * a message that was larger than allowed. */
1197 /* Test if socket buffer can handle max record
1198 * size (2^14 + 2048 + 13)
1200 optlen = (socklen_t) sizeof(int);
1201 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1202 OPENSSL_assert(ret >= 0);
1203 OPENSSL_assert(optval >= 18445);
1205 /* Test if SCTP doesn't partially deliver below
1206 * max record size (2^14 + 2048 + 13)
1208 optlen = (socklen_t) sizeof(int);
1209 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1211 OPENSSL_assert(ret >= 0);
1212 OPENSSL_assert(optval >= 18445);
1214 /* Partially delivered notification??? Probably a bug.... */
1215 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1217 /* Everything seems ok till now, so it's most likely
1218 * a message dropped by PR-SCTP.
1220 memset(out, 0, outl);
1221 BIO_set_retry_read(b);
1225 BIO_clear_retry_flags(b);
1228 if (BIO_dgram_should_retry(ret))
1230 BIO_set_retry_read(b);
1231 data->_errno = get_last_socket_error();
1235 /* Test if peer uses SCTP-AUTH before continuing */
1236 if (!data->peer_auth_tested)
1238 int ii, auth_data = 0, auth_forward = 0;
1240 struct sctp_authchunks *authchunks;
1242 optlen = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1243 authchunks = OPENSSL_malloc(optlen);
1244 memset(authchunks, 0, sizeof(optlen));
1245 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS, authchunks, &optlen);
1246 OPENSSL_assert(ii >= 0);
1248 for (p = (unsigned char*) authchunks + sizeof(sctp_assoc_t);
1249 p < (unsigned char*) authchunks + optlen;
1250 p += sizeof(uint8_t))
1252 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1;
1253 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1;
1256 OPENSSL_free(authchunks);
1258 if (!auth_data || !auth_forward)
1260 BIOerr(BIO_F_DGRAM_SCTP_READ,BIO_R_CONNECT_ERROR);
1264 data->peer_auth_tested = 1;
1270 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1273 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1274 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1275 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1276 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1277 struct iovec iov[1];
1279 struct cmsghdr *cmsg;
1280 #if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1281 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) + CMSG_SPACE(sizeof(struct sctp_prinfo))];
1282 struct sctp_sndinfo *sndinfo;
1283 struct sctp_prinfo *prinfo;
1285 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1286 struct sctp_sndrcvinfo *sndrcvinfo;
1289 clear_socket_error();
1291 /* If we're send anything else than application data,
1292 * disable all user parameters and flags.
1295 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1296 #ifdef SCTP_SACK_IMMEDIATELY
1297 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1299 sinfo = &handshake_sinfo;
1302 /* If we have to send a shutdown alert message and the
1303 * socket is not dry yet, we have to save it and send it
1304 * as soon as the socket gets dry.
1306 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b))
1308 data->saved_message.bio = b;
1309 data->saved_message.length = inl;
1310 data->saved_message.data = OPENSSL_malloc(inl);
1311 memcpy(data->saved_message.data, in, inl);
1315 iov[0].iov_base = (char *)in;
1316 iov[0].iov_len = inl;
1317 msg.msg_name = NULL;
1318 msg.msg_namelen = 0;
1321 msg.msg_control = (caddr_t)cmsgbuf;
1322 msg.msg_controllen = 0;
1324 #if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1325 cmsg = (struct cmsghdr *)cmsgbuf;
1326 cmsg->cmsg_level = IPPROTO_SCTP;
1327 cmsg->cmsg_type = SCTP_SNDINFO;
1328 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1329 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1330 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1331 sndinfo->snd_sid = sinfo->snd_sid;
1332 sndinfo->snd_flags = sinfo->snd_flags;
1333 sndinfo->snd_ppid = sinfo->snd_ppid;
1334 sndinfo->snd_context = sinfo->snd_context;
1335 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1337 cmsg = (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1338 cmsg->cmsg_level = IPPROTO_SCTP;
1339 cmsg->cmsg_type = SCTP_PRINFO;
1340 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1341 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1342 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1343 prinfo->pr_policy = pinfo->pr_policy;
1344 prinfo->pr_value = pinfo->pr_value;
1345 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1347 cmsg = (struct cmsghdr *)cmsgbuf;
1348 cmsg->cmsg_level = IPPROTO_SCTP;
1349 cmsg->cmsg_type = SCTP_SNDRCV;
1350 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1351 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1352 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1353 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1354 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1356 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1358 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1359 sndrcvinfo->sinfo_context = sinfo->snd_context;
1360 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1361 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1364 ret = sendmsg(b->num, &msg, 0);
1366 BIO_clear_retry_flags(b);
1369 if (BIO_dgram_should_retry(ret))
1371 BIO_set_retry_write(b);
1372 data->_errno = get_last_socket_error();
1378 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1381 bio_dgram_sctp_data *data = NULL;
1382 socklen_t sockopt_len = 0;
1383 struct sctp_authkeyid authkeyid;
1384 struct sctp_authkey *authkey;
1386 data = (bio_dgram_sctp_data *)b->ptr;
1390 case BIO_CTRL_DGRAM_QUERY_MTU:
1391 /* Set to maximum (2^14)
1392 * and ignore user input to enable transport
1393 * protocol fragmentation.
1394 * Returns always 2^14.
1399 case BIO_CTRL_DGRAM_SET_MTU:
1400 /* Set to maximum (2^14)
1401 * and ignore input to enable transport
1402 * protocol fragmentation.
1403 * Returns always 2^14.
1408 case BIO_CTRL_DGRAM_SET_CONNECTED:
1409 case BIO_CTRL_DGRAM_CONNECT:
1410 /* Returns always -1. */
1413 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1414 /* SCTP doesn't need the DTLS timer
1418 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1420 data->in_handshake = 1;
1422 data->in_handshake = 0;
1424 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY, &data->in_handshake, sizeof(int));
1426 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1427 /* New shared key for SCTP AUTH.
1428 * Returns 0 on success, -1 otherwise.
1431 /* Get active key */
1432 sockopt_len = sizeof(struct sctp_authkeyid);
1433 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1437 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1438 authkey = OPENSSL_malloc(sockopt_len);
1439 memset(authkey, 0x00, sockopt_len);
1440 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1442 /* This field is missing in FreeBSD 8.2 and earlier,
1443 * and FreeBSD 8.3 and higher work without it.
1445 authkey->sca_keylength = 64;
1447 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1449 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey, sockopt_len);
1452 /* Reset active key */
1453 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1454 &authkeyid, sizeof(struct sctp_authkeyid));
1458 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1459 /* Returns 0 on success, -1 otherwise. */
1461 /* Get active key */
1462 sockopt_len = sizeof(struct sctp_authkeyid);
1463 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1466 /* Set active key */
1467 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1468 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1469 &authkeyid, sizeof(struct sctp_authkeyid));
1472 /* CCS has been sent, so remember that and fall through
1473 * to check if we need to deactivate an old key
1477 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1478 /* Returns 0 on success, -1 otherwise. */
1480 /* Has this command really been called or is this just a fall-through? */
1481 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1484 /* CSS has been both, received and sent, so deactivate an old key */
1485 if (data->ccs_rcvd == 1 && data->ccs_sent == 1)
1487 /* Get active key */
1488 sockopt_len = sizeof(struct sctp_authkeyid);
1489 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1492 /* Deactivate key or delete second last key if
1493 * SCTP_AUTHENTICATION_EVENT is not available.
1495 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1496 #ifdef SCTP_AUTH_DEACTIVATE_KEY
1497 sockopt_len = sizeof(struct sctp_authkeyid);
1498 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1499 &authkeyid, sockopt_len);
1502 #ifndef SCTP_AUTHENTICATION_EVENT
1503 if (authkeyid.scact_keynumber > 0)
1505 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1506 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1507 &authkeyid, sizeof(struct sctp_authkeyid));
1516 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1517 /* Returns the size of the copied struct. */
1518 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo))
1519 num = sizeof(struct bio_dgram_sctp_sndinfo);
1521 memcpy(ptr, &(data->sndinfo), num);
1524 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1525 /* Returns the size of the copied struct. */
1526 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo))
1527 num = sizeof(struct bio_dgram_sctp_sndinfo);
1529 memcpy(&(data->sndinfo), ptr, num);
1531 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1532 /* Returns the size of the copied struct. */
1533 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo))
1534 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1536 memcpy(ptr, &data->rcvinfo, num);
1540 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1541 /* Returns the size of the copied struct. */
1542 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo))
1543 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1545 memcpy(&(data->rcvinfo), ptr, num);
1547 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1548 /* Returns the size of the copied struct. */
1549 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo))
1550 num = sizeof(struct bio_dgram_sctp_prinfo);
1552 memcpy(ptr, &(data->prinfo), num);
1555 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1556 /* Returns the size of the copied struct. */
1557 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo))
1558 num = sizeof(struct bio_dgram_sctp_prinfo);
1560 memcpy(&(data->prinfo), ptr, num);
1562 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1563 /* Returns always 1. */
1565 data->save_shutdown = 1;
1567 data->save_shutdown = 0;
1571 /* Pass to default ctrl function to
1572 * process SCTP unspecific commands
1574 ret=dgram_ctrl(b, cmd, num, ptr);
1580 int BIO_dgram_sctp_notification_cb(BIO *b,
1581 void (*handle_notifications)(BIO *bio, void *context, void *buf),
1584 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1586 if (handle_notifications != NULL)
1588 data->handle_notifications = handle_notifications;
1589 data->notification_context = context;
1597 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1600 int n, sockflags, ret;
1601 union sctp_notification snp;
1605 struct sctp_event event;
1607 struct sctp_event_subscribe event;
1608 socklen_t eventsize;
1610 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1612 /* set sender dry event */
1614 memset(&event, 0, sizeof(struct sctp_event));
1615 event.se_assoc_id = 0;
1616 event.se_type = SCTP_SENDER_DRY_EVENT;
1618 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1620 eventsize = sizeof(struct sctp_event_subscribe);
1621 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1625 event.sctp_sender_dry_event = 1;
1627 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1632 /* peek for notification */
1633 memset(&snp, 0x00, sizeof(union sctp_notification));
1634 iov.iov_base = (char *)&snp;
1635 iov.iov_len = sizeof(union sctp_notification);
1636 msg.msg_name = NULL;
1637 msg.msg_namelen = 0;
1640 msg.msg_control = NULL;
1641 msg.msg_controllen = 0;
1644 n = recvmsg(b->num, &msg, MSG_PEEK);
1647 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1653 /* if we find a notification, process it and try again if necessary */
1654 while (msg.msg_flags & MSG_NOTIFICATION)
1656 memset(&snp, 0x00, sizeof(union sctp_notification));
1657 iov.iov_base = (char *)&snp;
1658 iov.iov_len = sizeof(union sctp_notification);
1659 msg.msg_name = NULL;
1660 msg.msg_namelen = 0;
1663 msg.msg_control = NULL;
1664 msg.msg_controllen = 0;
1667 n = recvmsg(b->num, &msg, 0);
1670 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1676 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT)
1680 /* disable sender dry event */
1682 memset(&event, 0, sizeof(struct sctp_event));
1683 event.se_assoc_id = 0;
1684 event.se_type = SCTP_SENDER_DRY_EVENT;
1686 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1688 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1689 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1693 event.sctp_sender_dry_event = 0;
1695 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1701 #ifdef SCTP_AUTHENTICATION_EVENT
1702 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1703 dgram_sctp_handle_auth_free_key_event(b, &snp);
1706 if (data->handle_notifications != NULL)
1707 data->handle_notifications(b, data->notification_context, (void*) &snp);
1709 /* found notification, peek again */
1710 memset(&snp, 0x00, sizeof(union sctp_notification));
1711 iov.iov_base = (char *)&snp;
1712 iov.iov_len = sizeof(union sctp_notification);
1713 msg.msg_name = NULL;
1714 msg.msg_namelen = 0;
1717 msg.msg_control = NULL;
1718 msg.msg_controllen = 0;
1721 /* if we have seen the dry already, don't wait */
1724 sockflags = fcntl(b->num, F_GETFL, 0);
1725 fcntl(b->num, F_SETFL, O_NONBLOCK);
1728 n = recvmsg(b->num, &msg, MSG_PEEK);
1732 fcntl(b->num, F_SETFL, sockflags);
1737 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1744 /* read anything else */
1748 int BIO_dgram_sctp_msg_waiting(BIO *b)
1751 union sctp_notification snp;
1754 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1756 /* Check if there are any messages waiting to be read */
1759 memset(&snp, 0x00, sizeof(union sctp_notification));
1760 iov.iov_base = (char *)&snp;
1761 iov.iov_len = sizeof(union sctp_notification);
1762 msg.msg_name = NULL;
1763 msg.msg_namelen = 0;
1766 msg.msg_control = NULL;
1767 msg.msg_controllen = 0;
1770 sockflags = fcntl(b->num, F_GETFL, 0);
1771 fcntl(b->num, F_SETFL, O_NONBLOCK);
1772 n = recvmsg(b->num, &msg, MSG_PEEK);
1773 fcntl(b->num, F_SETFL, sockflags);
1775 /* if notification, process and try again */
1776 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION))
1778 #ifdef SCTP_AUTHENTICATION_EVENT
1779 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1780 dgram_sctp_handle_auth_free_key_event(b, &snp);
1783 memset(&snp, 0x00, sizeof(union sctp_notification));
1784 iov.iov_base = (char *)&snp;
1785 iov.iov_len = sizeof(union sctp_notification);
1786 msg.msg_name = NULL;
1787 msg.msg_namelen = 0;
1790 msg.msg_control = NULL;
1791 msg.msg_controllen = 0;
1793 n = recvmsg(b->num, &msg, 0);
1795 if (data->handle_notifications != NULL)
1796 data->handle_notifications(b, data->notification_context, (void*) &snp);
1799 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1801 /* Return 1 if there is a message to be read, return 0 otherwise. */
1808 static int dgram_sctp_puts(BIO *bp, const char *str)
1813 ret=dgram_sctp_write(bp,str,n);
1818 static int BIO_dgram_should_retry(int i)
1822 if ((i == 0) || (i == -1))
1824 err=get_last_socket_error();
1826 #if defined(OPENSSL_SYS_WINDOWS)
1827 /* If the socket return value (i) is -1
1828 * and err is unexpectedly 0 at this point,
1829 * the error code was overwritten by
1830 * another system call before this error
1831 * handling is called.
1835 return(BIO_dgram_non_fatal_error(err));
1840 int BIO_dgram_non_fatal_error(int err)
1844 #if defined(OPENSSL_SYS_WINDOWS)
1845 # if defined(WSAEWOULDBLOCK)
1846 case WSAEWOULDBLOCK:
1849 # if 0 /* This appears to always be an error */
1850 # if defined(WSAENOTCONN)
1857 # ifdef WSAEWOULDBLOCK
1858 # if WSAEWOULDBLOCK != EWOULDBLOCK
1871 #if EWOULDBLOCK != EAGAIN
1896 static void get_current_time(struct timeval *t)
1898 #ifdef OPENSSL_SYS_WIN32
1901 t->tv_sec = (long)tb.time;
1902 t->tv_usec = (long)tb.millitm * 1000;
1903 #elif defined(OPENSSL_SYS_VMS)
1906 t->tv_sec = (long)tb.time;
1907 t->tv_usec = (long)tb.millitm * 1000;
1909 gettimeofday(t, NULL);