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 #ifdef OPENSSL_SYS_LINUX
81 #define IP_MTU 14 /* linux is lame */
85 #define sock_write SockWrite /* Watt-32 uses same names */
86 #define sock_read SockRead
87 #define sock_puts SockPuts
90 static int dgram_write(BIO *h, const char *buf, int num);
91 static int dgram_read(BIO *h, char *buf, int size);
92 static int dgram_puts(BIO *h, const char *str);
93 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
94 static int dgram_new(BIO *h);
95 static int dgram_free(BIO *data);
96 static int dgram_clear(BIO *bio);
98 #ifndef OPENSSL_NO_SCTP
99 static int dgram_sctp_write(BIO *h, const char *buf, int num);
100 static int dgram_sctp_read(BIO *h, char *buf, int size);
101 static int dgram_sctp_puts(BIO *h, const char *str);
102 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
103 static int dgram_sctp_new(BIO *h);
104 static int dgram_sctp_free(BIO *data);
105 #ifdef SCTP_AUTHENTICATION_EVENT
106 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp);
110 static int BIO_dgram_should_retry(int s);
112 static void get_current_time(struct timeval *t);
114 static BIO_METHOD methods_dgramp=
121 NULL, /* dgram_gets, */
128 #ifndef OPENSSL_NO_SCTP
129 static BIO_METHOD methods_dgramp_sctp=
132 "datagram sctp socket",
136 NULL, /* dgram_gets, */
144 typedef struct bio_dgram_data_st
148 struct sockaddr_in sa_in;
150 struct sockaddr_in6 sa_in6;
153 unsigned int connected;
156 struct timeval next_timeout;
157 struct timeval socket_timeout;
160 #ifndef OPENSSL_NO_SCTP
161 typedef struct bio_dgram_sctp_save_message_st
166 } bio_dgram_sctp_save_message;
168 typedef struct bio_dgram_sctp_data_st
172 struct sockaddr_in sa_in;
174 struct sockaddr_in6 sa_in6;
177 unsigned int connected;
180 struct bio_dgram_sctp_sndinfo sndinfo;
181 struct bio_dgram_sctp_rcvinfo rcvinfo;
182 struct bio_dgram_sctp_prinfo prinfo;
183 void (*handle_notifications)(BIO *bio, void *context, void *buf);
184 void* notification_context;
189 int peer_auth_tested;
190 bio_dgram_sctp_save_message saved_message;
191 } bio_dgram_sctp_data;
194 BIO_METHOD *BIO_s_datagram(void)
196 return(&methods_dgramp);
199 BIO *BIO_new_dgram(int fd, int close_flag)
203 ret=BIO_new(BIO_s_datagram());
204 if (ret == NULL) return(NULL);
205 BIO_set_fd(ret,fd,close_flag);
209 static int dgram_new(BIO *bi)
211 bio_dgram_data *data = NULL;
215 data = OPENSSL_malloc(sizeof(bio_dgram_data));
218 memset(data, 0x00, sizeof(bio_dgram_data));
225 static int dgram_free(BIO *a)
227 bio_dgram_data *data;
229 if (a == NULL) return(0);
230 if ( ! dgram_clear(a))
233 data = (bio_dgram_data *)a->ptr;
234 if(data != NULL) OPENSSL_free(data);
239 static int dgram_clear(BIO *a)
241 if (a == NULL) return(0);
254 static void dgram_adjust_rcv_timeout(BIO *b)
256 #if defined(SO_RCVTIMEO)
257 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
258 int sz = sizeof(int);
260 /* Is a timer active? */
261 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0)
263 struct timeval timenow, timeleft;
265 /* Read current socket timeout */
266 #ifdef OPENSSL_SYS_WINDOWS
268 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
269 (void*)&timeout, &sz) < 0)
270 { perror("getsockopt"); }
273 data->socket_timeout.tv_sec = timeout / 1000;
274 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
277 if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
278 &(data->socket_timeout), (void *)&sz) < 0)
279 { perror("getsockopt"); }
282 /* Get current time */
283 get_current_time(&timenow);
285 /* Calculate time left until timer expires */
286 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
287 timeleft.tv_sec -= timenow.tv_sec;
288 timeleft.tv_usec -= timenow.tv_usec;
289 if (timeleft.tv_usec < 0)
292 timeleft.tv_usec += 1000000;
295 if (timeleft.tv_sec < 0)
298 timeleft.tv_usec = 1;
301 /* Adjust socket timeout if next handhake message timer
302 * will expire earlier.
304 if ((data->socket_timeout.tv_sec == 0 && data->socket_timeout.tv_usec == 0) ||
305 (data->socket_timeout.tv_sec > timeleft.tv_sec) ||
306 (data->socket_timeout.tv_sec == timeleft.tv_sec &&
307 data->socket_timeout.tv_usec >= timeleft.tv_usec))
309 #ifdef OPENSSL_SYS_WINDOWS
310 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
311 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
312 (void*)&timeout, sizeof(timeout)) < 0)
313 { perror("setsockopt"); }
315 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
316 sizeof(struct timeval)) < 0)
317 { perror("setsockopt"); }
324 static void dgram_reset_rcv_timeout(BIO *b)
326 #if defined(SO_RCVTIMEO)
327 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
329 /* Is a timer active? */
330 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0)
332 #ifdef OPENSSL_SYS_WINDOWS
333 int timeout = data->socket_timeout.tv_sec * 1000 +
334 data->socket_timeout.tv_usec / 1000;
335 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
336 (void*)&timeout, sizeof(timeout)) < 0)
337 { perror("setsockopt"); }
339 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
340 sizeof(struct timeval)) < 0)
341 { perror("setsockopt"); }
347 static int dgram_read(BIO *b, char *out, int outl)
350 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
354 * See commentary in b_sock.c. <appro>
356 union { size_t s; int i; } len;
359 struct sockaddr_in sa_in;
361 struct sockaddr_in6 sa_in6;
367 sa.len.i=sizeof(sa.peer);
371 clear_socket_error();
372 memset(&sa.peer, 0x00, sizeof(sa.peer));
373 dgram_adjust_rcv_timeout(b);
374 ret=recvfrom(b->num,out,outl,0,&sa.peer.sa,(void *)&sa.len);
375 if (sizeof(sa.len.i)!=sizeof(sa.len.s) && sa.len.i==0)
377 OPENSSL_assert(sa.len.s<=sizeof(sa.peer));
378 sa.len.i = (int)sa.len.s;
381 if ( ! data->connected && ret >= 0)
382 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
384 BIO_clear_retry_flags(b);
387 if (BIO_dgram_should_retry(ret))
389 BIO_set_retry_read(b);
390 data->_errno = get_last_socket_error();
394 dgram_reset_rcv_timeout(b);
399 static int dgram_write(BIO *b, const char *in, int inl)
402 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
403 clear_socket_error();
405 if ( data->connected )
406 ret=writesocket(b->num,in,inl);
409 int peerlen = sizeof(data->peer);
411 if (data->peer.sa.sa_family == AF_INET)
412 peerlen = sizeof(data->peer.sa_in);
414 else if (data->peer.sa.sa_family == AF_INET6)
415 peerlen = sizeof(data->peer.sa_in6);
417 #if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
418 ret=sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
420 ret=sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
424 BIO_clear_retry_flags(b);
427 if (BIO_dgram_should_retry(ret))
429 BIO_set_retry_write(b);
430 data->_errno = get_last_socket_error();
432 #if 0 /* higher layers are responsible for querying MTU, if necessary */
433 if ( data->_errno == EMSGSIZE)
434 /* retrieve the new MTU */
435 BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
442 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
446 struct sockaddr *to = NULL;
447 bio_dgram_data *data = NULL;
448 #if defined(IP_MTU_DISCOVER) || defined(IP_MTU)
449 long sockopt_val = 0;
450 unsigned int sockopt_len = 0;
452 #ifdef OPENSSL_SYS_LINUX
456 struct sockaddr_in s4;
458 struct sockaddr_in6 s6;
463 data = (bio_dgram_data *)b->ptr;
469 case BIO_C_FILE_SEEK:
472 case BIO_C_FILE_TELL:
478 b->num= *((int *)ptr);
479 b->shutdown=(int)num;
486 if (ip != NULL) *ip=b->num;
492 case BIO_CTRL_GET_CLOSE:
495 case BIO_CTRL_SET_CLOSE:
496 b->shutdown=(int)num;
498 case BIO_CTRL_PENDING:
499 case BIO_CTRL_WPENDING:
506 case BIO_CTRL_DGRAM_CONNECT:
507 to = (struct sockaddr *)ptr;
509 if (connect(b->num, to, sizeof(struct sockaddr)) < 0)
510 { perror("connect"); ret = 0; }
514 switch (to->sa_family)
517 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
521 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
525 memcpy(&data->peer,to,sizeof(data->peer.sa));
532 /* (Linux)kernel sets DF bit on outgoing IP packets */
533 case BIO_CTRL_DGRAM_MTU_DISCOVER:
534 #ifdef OPENSSL_SYS_LINUX
535 addr_len = (socklen_t)sizeof(addr);
536 memset((void *)&addr, 0, sizeof(addr));
537 if (getsockname(b->num, &addr.sa, &addr_len) < 0)
542 sockopt_len = sizeof(sockopt_val);
543 switch (addr.sa.sa_family)
546 sockopt_val = IP_PMTUDISC_DO;
547 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
548 &sockopt_val, sizeof(sockopt_val))) < 0)
549 perror("setsockopt");
551 #if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER)
553 sockopt_val = IPV6_PMTUDISC_DO;
554 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
555 &sockopt_val, sizeof(sockopt_val))) < 0)
556 perror("setsockopt");
567 case BIO_CTRL_DGRAM_QUERY_MTU:
568 #ifdef OPENSSL_SYS_LINUX
569 addr_len = (socklen_t)sizeof(addr);
570 memset((void *)&addr, 0, sizeof(addr));
571 if (getsockname(b->num, &addr.sa, &addr_len) < 0)
576 sockopt_len = sizeof(sockopt_val);
577 switch (addr.sa.sa_family)
580 if ((ret = getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
581 &sockopt_len)) < 0 || sockopt_val < 0)
587 /* we assume that the transport protocol is UDP and no
588 * IP options are used.
590 data->mtu = sockopt_val - 8 - 20;
594 #if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
596 if ((ret = getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU, (void *)&sockopt_val,
597 &sockopt_len)) < 0 || sockopt_val < 0)
603 /* we assume that the transport protocol is UDP and no
604 * IPV6 options are used.
606 data->mtu = sockopt_val - 8 - 40;
619 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
620 switch (data->peer.sa.sa_family)
627 #ifdef IN6_IS_ADDR_V4MAPPED
628 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
640 case BIO_CTRL_DGRAM_GET_MTU:
643 case BIO_CTRL_DGRAM_SET_MTU:
647 case BIO_CTRL_DGRAM_SET_CONNECTED:
648 to = (struct sockaddr *)ptr;
653 switch (to->sa_family)
656 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
660 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
664 memcpy(&data->peer,to,sizeof(data->peer.sa));
671 memset(&(data->peer), 0x00, sizeof(data->peer));
674 case BIO_CTRL_DGRAM_GET_PEER:
675 switch (data->peer.sa.sa_family)
678 ret=sizeof(data->peer.sa_in);
682 ret=sizeof(data->peer.sa_in6);
686 ret=sizeof(data->peer.sa);
689 if (num==0 || num>ret)
691 memcpy(ptr,&data->peer,(ret=num));
693 case BIO_CTRL_DGRAM_SET_PEER:
694 to = (struct sockaddr *) ptr;
695 switch (to->sa_family)
698 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
702 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
706 memcpy(&data->peer,to,sizeof(data->peer.sa));
710 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
711 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
713 #if defined(SO_RCVTIMEO)
714 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
715 #ifdef OPENSSL_SYS_WINDOWS
717 struct timeval *tv = (struct timeval *)ptr;
718 int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
719 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
720 (void*)&timeout, sizeof(timeout)) < 0)
721 { perror("setsockopt"); ret = -1; }
724 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
725 sizeof(struct timeval)) < 0)
726 { perror("setsockopt"); ret = -1; }
729 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
730 #ifdef OPENSSL_SYS_WINDOWS
732 int timeout, sz = sizeof(timeout);
733 struct timeval *tv = (struct timeval *)ptr;
734 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
735 (void*)&timeout, &sz) < 0)
736 { perror("getsockopt"); ret = -1; }
739 tv->tv_sec = timeout / 1000;
740 tv->tv_usec = (timeout % 1000) * 1000;
745 if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
746 ptr, (void *)&ret) < 0)
747 { perror("getsockopt"); ret = -1; }
751 #if defined(SO_SNDTIMEO)
752 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
753 #ifdef OPENSSL_SYS_WINDOWS
755 struct timeval *tv = (struct timeval *)ptr;
756 int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
757 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
758 (void*)&timeout, sizeof(timeout)) < 0)
759 { perror("setsockopt"); ret = -1; }
762 if ( setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
763 sizeof(struct timeval)) < 0)
764 { perror("setsockopt"); ret = -1; }
767 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
768 #ifdef OPENSSL_SYS_WINDOWS
770 int timeout, sz = sizeof(timeout);
771 struct timeval *tv = (struct timeval *)ptr;
772 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
773 (void*)&timeout, &sz) < 0)
774 { perror("getsockopt"); ret = -1; }
777 tv->tv_sec = timeout / 1000;
778 tv->tv_usec = (timeout % 1000) * 1000;
783 if ( getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
784 ptr, (void *)&ret) < 0)
785 { perror("getsockopt"); ret = -1; }
789 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
791 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
792 #ifdef OPENSSL_SYS_WINDOWS
793 if ( data->_errno == WSAETIMEDOUT)
795 if ( data->_errno == EAGAIN)
805 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
806 if ( data->_errno == EMSGSIZE)
822 static int dgram_puts(BIO *bp, const char *str)
827 ret=dgram_write(bp,str,n);
831 #ifndef OPENSSL_NO_SCTP
832 BIO_METHOD *BIO_s_datagram_sctp(void)
834 return(&methods_dgramp_sctp);
837 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
840 int ret, optval = 20000;
841 int auth_data = 0, auth_forward = 0;
843 struct sctp_authchunk auth;
844 struct sctp_authchunks *authchunks;
845 socklen_t sockopt_len;
846 #ifdef SCTP_AUTHENTICATION_EVENT
848 struct sctp_event event;
850 struct sctp_event_subscribe event;
854 bio=BIO_new(BIO_s_datagram_sctp());
855 if (bio == NULL) return(NULL);
856 BIO_set_fd(bio,fd,close_flag);
858 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
859 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
860 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk));
861 OPENSSL_assert(ret >= 0);
862 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
863 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk));
864 OPENSSL_assert(ret >= 0);
866 /* Test if activation was successful. When using accept(),
867 * SCTP-AUTH has to be activated for the listening socket
868 * already, otherwise the connected socket won't use it. */
869 sockopt_len = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
870 authchunks = OPENSSL_malloc(sockopt_len);
871 memset(authchunks, 0, sizeof(sockopt_len));
872 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks, &sockopt_len);
873 OPENSSL_assert(ret >= 0);
875 for (p = (unsigned char*) authchunks + sizeof(sctp_assoc_t);
876 p < (unsigned char*) authchunks + sockopt_len;
877 p += sizeof(uint8_t))
879 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1;
880 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1;
883 OPENSSL_free(authchunks);
885 OPENSSL_assert(auth_data);
886 OPENSSL_assert(auth_forward);
888 #ifdef SCTP_AUTHENTICATION_EVENT
890 memset(&event, 0, sizeof(struct sctp_event));
891 event.se_assoc_id = 0;
892 event.se_type = SCTP_AUTHENTICATION_EVENT;
894 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
895 OPENSSL_assert(ret >= 0);
897 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
898 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
899 OPENSSL_assert(ret >= 0);
901 event.sctp_authentication_event = 1;
903 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
904 OPENSSL_assert(ret >= 0);
908 /* Disable partial delivery by setting the min size
909 * larger than the max record size of 2^14 + 2048 + 13
911 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval, sizeof(optval));
912 OPENSSL_assert(ret >= 0);
917 int BIO_dgram_is_sctp(BIO *bio)
919 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
922 static int dgram_sctp_new(BIO *bi)
924 bio_dgram_sctp_data *data = NULL;
928 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
931 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
932 #ifdef SCTP_PR_SCTP_NONE
933 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
941 static int dgram_sctp_free(BIO *a)
943 bio_dgram_sctp_data *data;
945 if (a == NULL) return(0);
946 if ( ! dgram_clear(a))
949 data = (bio_dgram_sctp_data *)a->ptr;
950 if(data != NULL) OPENSSL_free(data);
955 #ifdef SCTP_AUTHENTICATION_EVENT
956 void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp)
958 unsigned int sockopt_len = 0;
960 struct sctp_authkey_event* authkeyevent = &snp->sn_auth_event;
962 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY)
964 struct sctp_authkeyid authkeyid;
967 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
968 sockopt_len = sizeof(struct sctp_authkeyid);
969 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
970 &authkeyid, sockopt_len);
975 static int dgram_sctp_read(BIO *b, char *out, int outl)
977 int ret = 0, n = 0, i, optval;
979 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
980 union sctp_notification *snp;
983 struct cmsghdr *cmsg;
988 clear_socket_error();
992 memset(&data->rcvinfo, 0x00, sizeof(struct bio_dgram_sctp_rcvinfo));
999 msg.msg_control = cmsgbuf;
1000 msg.msg_controllen = 512;
1002 n = recvmsg(b->num, &msg, 0);
1004 if (msg.msg_controllen > 0)
1006 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg))
1008 if (cmsg->cmsg_level != IPPROTO_SCTP)
1011 if (cmsg->cmsg_type == SCTP_RCVINFO)
1013 struct sctp_rcvinfo *rcvinfo;
1015 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1016 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1017 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1018 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1019 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1020 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1021 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1022 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1026 if (cmsg->cmsg_type == SCTP_SNDRCV)
1028 struct sctp_sndrcvinfo *sndrcvinfo;
1030 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1031 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1032 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1033 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1034 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1035 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1036 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1037 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1050 if (msg.msg_flags & MSG_NOTIFICATION)
1052 snp = (union sctp_notification*) out;
1053 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT)
1056 struct sctp_event event;
1058 struct sctp_event_subscribe event;
1059 socklen_t eventsize;
1061 /* If a message has been delayed until the socket
1062 * is dry, it can be sent now.
1064 if (data->saved_message.length > 0)
1066 dgram_sctp_write(data->saved_message.bio, data->saved_message.data,
1067 data->saved_message.length);
1068 OPENSSL_free(data->saved_message.data);
1069 data->saved_message.length = 0;
1072 /* disable sender dry event */
1074 memset(&event, 0, sizeof(struct sctp_event));
1075 event.se_assoc_id = 0;
1076 event.se_type = SCTP_SENDER_DRY_EVENT;
1078 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1079 OPENSSL_assert(i >= 0);
1081 eventsize = sizeof(struct sctp_event_subscribe);
1082 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1083 OPENSSL_assert(i >= 0);
1085 event.sctp_sender_dry_event = 0;
1087 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1088 OPENSSL_assert(i >= 0);
1092 #ifdef SCTP_AUTHENTICATION_EVENT
1093 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1094 dgram_sctp_handle_auth_free_key_event(b, snp);
1097 if (data->handle_notifications != NULL)
1098 data->handle_notifications(b, data->notification_context, (void*) out);
1100 memset(out, 0, outl);
1105 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR) && (ret < outl));
1107 if (ret > 0 && !(msg.msg_flags & MSG_EOR))
1109 /* Partial message read, this should never happen! */
1111 /* The buffer was too small, this means the peer sent
1112 * a message that was larger than allowed. */
1116 /* Test if socket buffer can handle max record
1117 * size (2^14 + 2048 + 13)
1119 optlen = (socklen_t) sizeof(int);
1120 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1121 OPENSSL_assert(ret >= 0);
1122 OPENSSL_assert(optval >= 18445);
1124 /* Test if SCTP doesn't partially deliver below
1125 * max record size (2^14 + 2048 + 13)
1127 optlen = (socklen_t) sizeof(int);
1128 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1130 OPENSSL_assert(ret >= 0);
1131 OPENSSL_assert(optval >= 18445);
1133 /* Partially delivered notification??? Probably a bug.... */
1134 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1136 /* Everything seems ok till now, so it's most likely
1137 * a message dropped by PR-SCTP.
1139 memset(out, 0, outl);
1140 BIO_set_retry_read(b);
1144 BIO_clear_retry_flags(b);
1147 if (BIO_dgram_should_retry(ret))
1149 BIO_set_retry_read(b);
1150 data->_errno = get_last_socket_error();
1154 /* Test if peer uses SCTP-AUTH before continuing */
1155 if (!data->peer_auth_tested)
1157 int ii, auth_data = 0, auth_forward = 0;
1159 struct sctp_authchunks *authchunks;
1161 optlen = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1162 authchunks = OPENSSL_malloc(optlen);
1163 memset(authchunks, 0, sizeof(optlen));
1164 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS, authchunks, &optlen);
1165 OPENSSL_assert(ii >= 0);
1167 for (p = (unsigned char*) authchunks + sizeof(sctp_assoc_t);
1168 p < (unsigned char*) authchunks + optlen;
1169 p += sizeof(uint8_t))
1171 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1;
1172 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1;
1175 OPENSSL_free(authchunks);
1177 if (!auth_data || !auth_forward)
1179 BIOerr(BIO_F_DGRAM_SCTP_READ,BIO_R_CONNECT_ERROR);
1183 data->peer_auth_tested = 1;
1189 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1192 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1193 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1194 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1195 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1196 struct iovec iov[1];
1198 struct cmsghdr *cmsg;
1199 #if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1200 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) + CMSG_SPACE(sizeof(struct sctp_prinfo))];
1201 struct sctp_sndinfo *sndinfo;
1202 struct sctp_prinfo *prinfo;
1204 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1205 struct sctp_sndrcvinfo *sndrcvinfo;
1208 clear_socket_error();
1210 /* If we're send anything else than application data,
1211 * disable all user parameters and flags.
1214 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1215 #ifdef SCTP_SACK_IMMEDIATELY
1216 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1218 sinfo = &handshake_sinfo;
1221 /* If we have to send a shutdown alert message and the
1222 * socket is not dry yet, we have to save it and send it
1223 * as soon as the socket gets dry.
1225 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b))
1227 data->saved_message.bio = b;
1228 data->saved_message.length = inl;
1229 data->saved_message.data = OPENSSL_malloc(inl);
1230 memcpy(data->saved_message.data, in, inl);
1234 iov[0].iov_base = (char *)in;
1235 iov[0].iov_len = inl;
1236 msg.msg_name = NULL;
1237 msg.msg_namelen = 0;
1240 msg.msg_control = (caddr_t)cmsgbuf;
1241 msg.msg_controllen = 0;
1243 #if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1244 cmsg = (struct cmsghdr *)cmsgbuf;
1245 cmsg->cmsg_level = IPPROTO_SCTP;
1246 cmsg->cmsg_type = SCTP_SNDINFO;
1247 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1248 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1249 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1250 sndinfo->snd_sid = sinfo->snd_sid;
1251 sndinfo->snd_flags = sinfo->snd_flags;
1252 sndinfo->snd_ppid = sinfo->snd_ppid;
1253 sndinfo->snd_context = sinfo->snd_context;
1254 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1256 cmsg = (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1257 cmsg->cmsg_level = IPPROTO_SCTP;
1258 cmsg->cmsg_type = SCTP_PRINFO;
1259 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1260 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1261 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1262 prinfo->pr_policy = pinfo->pr_policy;
1263 prinfo->pr_value = pinfo->pr_value;
1264 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1266 cmsg = (struct cmsghdr *)cmsgbuf;
1267 cmsg->cmsg_level = IPPROTO_SCTP;
1268 cmsg->cmsg_type = SCTP_SNDRCV;
1269 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1270 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1271 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1272 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1273 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1275 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1277 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1278 sndrcvinfo->sinfo_context = sinfo->snd_context;
1279 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1280 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1283 ret = sendmsg(b->num, &msg, 0);
1285 BIO_clear_retry_flags(b);
1288 if (BIO_dgram_should_retry(ret))
1290 BIO_set_retry_write(b);
1291 data->_errno = get_last_socket_error();
1297 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1300 bio_dgram_sctp_data *data = NULL;
1301 unsigned int sockopt_len = 0;
1302 struct sctp_authkeyid authkeyid;
1303 struct sctp_authkey *authkey;
1305 data = (bio_dgram_sctp_data *)b->ptr;
1309 case BIO_CTRL_DGRAM_QUERY_MTU:
1310 /* Set to maximum (2^14)
1311 * and ignore user input to enable transport
1312 * protocol fragmentation.
1313 * Returns always 2^14.
1318 case BIO_CTRL_DGRAM_SET_MTU:
1319 /* Set to maximum (2^14)
1320 * and ignore input to enable transport
1321 * protocol fragmentation.
1322 * Returns always 2^14.
1327 case BIO_CTRL_DGRAM_SET_CONNECTED:
1328 case BIO_CTRL_DGRAM_CONNECT:
1329 /* Returns always -1. */
1332 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1333 /* SCTP doesn't need the DTLS timer
1337 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1339 data->in_handshake = 1;
1341 data->in_handshake = 0;
1343 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY, &data->in_handshake, sizeof(int));
1345 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1346 /* New shared key for SCTP AUTH.
1347 * Returns 0 on success, -1 otherwise.
1350 /* Get active key */
1351 sockopt_len = sizeof(struct sctp_authkeyid);
1352 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1356 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1357 authkey = OPENSSL_malloc(sockopt_len);
1358 memset(authkey, 0x00, sockopt_len);
1359 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1361 /* This field is missing in FreeBSD 8.2 and earlier,
1362 * and FreeBSD 8.3 and higher work without it.
1364 authkey->sca_keylength = 64;
1366 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1368 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey, sockopt_len);
1371 /* Reset active key */
1372 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1373 &authkeyid, sizeof(struct sctp_authkeyid));
1377 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1378 /* Returns 0 on success, -1 otherwise. */
1380 /* Get active key */
1381 sockopt_len = sizeof(struct sctp_authkeyid);
1382 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1385 /* Set active key */
1386 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1387 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1388 &authkeyid, sizeof(struct sctp_authkeyid));
1391 /* CCS has been sent, so remember that and fall through
1392 * to check if we need to deactivate an old key
1396 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1397 /* Returns 0 on success, -1 otherwise. */
1399 /* Has this command really been called or is this just a fall-through? */
1400 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1403 /* CSS has been both, received and sent, so deactivate an old key */
1404 if (data->ccs_rcvd == 1 && data->ccs_sent == 1)
1406 /* Get active key */
1407 sockopt_len = sizeof(struct sctp_authkeyid);
1408 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1411 /* Deactivate key or delete second last key if
1412 * SCTP_AUTHENTICATION_EVENT is not available.
1414 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1415 #ifdef SCTP_AUTH_DEACTIVATE_KEY
1416 sockopt_len = sizeof(struct sctp_authkeyid);
1417 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1418 &authkeyid, sockopt_len);
1421 #ifndef SCTP_AUTHENTICATION_EVENT
1422 if (authkeyid.scact_keynumber > 0)
1424 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1425 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1426 &authkeyid, sizeof(struct sctp_authkeyid));
1435 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1436 /* Returns the size of the copied struct. */
1437 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo))
1438 num = sizeof(struct bio_dgram_sctp_sndinfo);
1440 memcpy(ptr, &(data->sndinfo), num);
1443 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1444 /* Returns the size of the copied struct. */
1445 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo))
1446 num = sizeof(struct bio_dgram_sctp_sndinfo);
1448 memcpy(&(data->sndinfo), ptr, num);
1450 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1451 /* Returns the size of the copied struct. */
1452 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo))
1453 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1455 memcpy(ptr, &data->rcvinfo, num);
1459 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1460 /* Returns the size of the copied struct. */
1461 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo))
1462 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1464 memcpy(&(data->rcvinfo), ptr, num);
1466 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1467 /* Returns the size of the copied struct. */
1468 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo))
1469 num = sizeof(struct bio_dgram_sctp_prinfo);
1471 memcpy(ptr, &(data->prinfo), num);
1474 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1475 /* Returns the size of the copied struct. */
1476 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo))
1477 num = sizeof(struct bio_dgram_sctp_prinfo);
1479 memcpy(&(data->prinfo), ptr, num);
1481 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1482 /* Returns always 1. */
1484 data->save_shutdown = 1;
1486 data->save_shutdown = 0;
1490 /* Pass to default ctrl function to
1491 * process SCTP unspecific commands
1493 ret=dgram_ctrl(b, cmd, num, ptr);
1499 int BIO_dgram_sctp_notification_cb(BIO *b,
1500 void (*handle_notifications)(BIO *bio, void *context, void *buf),
1503 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1505 if (handle_notifications != NULL)
1507 data->handle_notifications = handle_notifications;
1508 data->notification_context = context;
1516 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1519 int n, sockflags, ret;
1520 union sctp_notification snp;
1524 struct sctp_event event;
1526 struct sctp_event_subscribe event;
1527 socklen_t eventsize;
1529 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1531 /* set sender dry event */
1533 memset(&event, 0, sizeof(struct sctp_event));
1534 event.se_assoc_id = 0;
1535 event.se_type = SCTP_SENDER_DRY_EVENT;
1537 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1539 eventsize = sizeof(struct sctp_event_subscribe);
1540 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1544 event.sctp_sender_dry_event = 1;
1546 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1551 /* peek for notification */
1552 memset(&snp, 0x00, sizeof(union sctp_notification));
1553 iov.iov_base = (char *)&snp;
1554 iov.iov_len = sizeof(union sctp_notification);
1555 msg.msg_name = NULL;
1556 msg.msg_namelen = 0;
1559 msg.msg_control = NULL;
1560 msg.msg_controllen = 0;
1563 n = recvmsg(b->num, &msg, MSG_PEEK);
1566 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1572 /* if we find a notification, process it and try again if necessary */
1573 while (msg.msg_flags & MSG_NOTIFICATION)
1575 memset(&snp, 0x00, sizeof(union sctp_notification));
1576 iov.iov_base = (char *)&snp;
1577 iov.iov_len = sizeof(union sctp_notification);
1578 msg.msg_name = NULL;
1579 msg.msg_namelen = 0;
1582 msg.msg_control = NULL;
1583 msg.msg_controllen = 0;
1586 n = recvmsg(b->num, &msg, 0);
1589 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1595 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT)
1599 /* disable sender dry event */
1601 memset(&event, 0, sizeof(struct sctp_event));
1602 event.se_assoc_id = 0;
1603 event.se_type = SCTP_SENDER_DRY_EVENT;
1605 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1607 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1608 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1612 event.sctp_sender_dry_event = 0;
1614 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1620 #ifdef SCTP_AUTHENTICATION_EVENT
1621 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1622 dgram_sctp_handle_auth_free_key_event(b, &snp);
1625 if (data->handle_notifications != NULL)
1626 data->handle_notifications(b, data->notification_context, (void*) &snp);
1628 /* found notification, peek again */
1629 memset(&snp, 0x00, sizeof(union sctp_notification));
1630 iov.iov_base = (char *)&snp;
1631 iov.iov_len = sizeof(union sctp_notification);
1632 msg.msg_name = NULL;
1633 msg.msg_namelen = 0;
1636 msg.msg_control = NULL;
1637 msg.msg_controllen = 0;
1640 /* if we have seen the dry already, don't wait */
1643 sockflags = fcntl(b->num, F_GETFL, 0);
1644 fcntl(b->num, F_SETFL, O_NONBLOCK);
1647 n = recvmsg(b->num, &msg, MSG_PEEK);
1651 fcntl(b->num, F_SETFL, sockflags);
1656 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1663 /* read anything else */
1667 int BIO_dgram_sctp_msg_waiting(BIO *b)
1670 union sctp_notification snp;
1673 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1675 /* Check if there are any messages waiting to be read */
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 sockflags = fcntl(b->num, F_GETFL, 0);
1690 fcntl(b->num, F_SETFL, O_NONBLOCK);
1691 n = recvmsg(b->num, &msg, MSG_PEEK);
1692 fcntl(b->num, F_SETFL, sockflags);
1694 /* if notification, process and try again */
1695 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION))
1697 #ifdef SCTP_AUTHENTICATION_EVENT
1698 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1699 dgram_sctp_handle_auth_free_key_event(b, &snp);
1702 memset(&snp, 0x00, sizeof(union sctp_notification));
1703 iov.iov_base = (char *)&snp;
1704 iov.iov_len = sizeof(union sctp_notification);
1705 msg.msg_name = NULL;
1706 msg.msg_namelen = 0;
1709 msg.msg_control = NULL;
1710 msg.msg_controllen = 0;
1712 n = recvmsg(b->num, &msg, 0);
1714 if (data->handle_notifications != NULL)
1715 data->handle_notifications(b, data->notification_context, (void*) &snp);
1718 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1720 /* Return 1 if there is a message to be read, return 0 otherwise. */
1727 static int dgram_sctp_puts(BIO *bp, const char *str)
1732 ret=dgram_sctp_write(bp,str,n);
1737 static int BIO_dgram_should_retry(int i)
1741 if ((i == 0) || (i == -1))
1743 err=get_last_socket_error();
1745 #if defined(OPENSSL_SYS_WINDOWS)
1746 /* If the socket return value (i) is -1
1747 * and err is unexpectedly 0 at this point,
1748 * the error code was overwritten by
1749 * another system call before this error
1750 * handling is called.
1754 return(BIO_dgram_non_fatal_error(err));
1759 int BIO_dgram_non_fatal_error(int err)
1763 #if defined(OPENSSL_SYS_WINDOWS)
1764 # if defined(WSAEWOULDBLOCK)
1765 case WSAEWOULDBLOCK:
1768 # if 0 /* This appears to always be an error */
1769 # if defined(WSAENOTCONN)
1776 # ifdef WSAEWOULDBLOCK
1777 # if WSAEWOULDBLOCK != EWOULDBLOCK
1790 #if EWOULDBLOCK != EAGAIN
1815 static void get_current_time(struct timeval *t)
1817 #ifdef OPENSSL_SYS_WIN32
1820 t->tv_sec = (long)tb.time;
1821 t->tv_usec = (long)tb.millitm * 1000;
1822 #elif defined(OPENSSL_SYS_VMS)
1825 t->tv_sec = (long)tb.time;
1826 t->tv_usec = (long)tb.millitm * 1000;
1828 gettimeofday(t, NULL);