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_MTU:
622 case BIO_CTRL_DGRAM_SET_MTU:
626 case BIO_CTRL_DGRAM_SET_CONNECTED:
627 to = (struct sockaddr *)ptr;
632 switch (to->sa_family)
635 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
639 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
643 memcpy(&data->peer,to,sizeof(data->peer.sa));
650 memset(&(data->peer), 0x00, sizeof(data->peer));
653 case BIO_CTRL_DGRAM_GET_PEER:
654 switch (data->peer.sa.sa_family)
657 ret=sizeof(data->peer.sa_in);
661 ret=sizeof(data->peer.sa_in6);
665 ret=sizeof(data->peer.sa);
668 if (num==0 || num>ret)
670 memcpy(ptr,&data->peer,(ret=num));
672 case BIO_CTRL_DGRAM_SET_PEER:
673 to = (struct sockaddr *) ptr;
674 switch (to->sa_family)
677 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
681 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
685 memcpy(&data->peer,to,sizeof(data->peer.sa));
689 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
690 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
692 #if defined(SO_RCVTIMEO)
693 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
694 #ifdef OPENSSL_SYS_WINDOWS
696 struct timeval *tv = (struct timeval *)ptr;
697 int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
698 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
699 (void*)&timeout, sizeof(timeout)) < 0)
700 { perror("setsockopt"); ret = -1; }
703 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
704 sizeof(struct timeval)) < 0)
705 { perror("setsockopt"); ret = -1; }
708 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
709 #ifdef OPENSSL_SYS_WINDOWS
711 int timeout, sz = sizeof(timeout);
712 struct timeval *tv = (struct timeval *)ptr;
713 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
714 (void*)&timeout, &sz) < 0)
715 { perror("getsockopt"); ret = -1; }
718 tv->tv_sec = timeout / 1000;
719 tv->tv_usec = (timeout % 1000) * 1000;
724 if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
725 ptr, (void *)&ret) < 0)
726 { perror("getsockopt"); ret = -1; }
730 #if defined(SO_SNDTIMEO)
731 case BIO_CTRL_DGRAM_SET_SEND_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_SNDTIMEO,
737 (void*)&timeout, sizeof(timeout)) < 0)
738 { perror("setsockopt"); ret = -1; }
741 if ( setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
742 sizeof(struct timeval)) < 0)
743 { perror("setsockopt"); ret = -1; }
746 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
747 #ifdef OPENSSL_SYS_WINDOWS
749 int timeout, sz = sizeof(timeout);
750 struct timeval *tv = (struct timeval *)ptr;
751 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
752 (void*)&timeout, &sz) < 0)
753 { perror("getsockopt"); ret = -1; }
756 tv->tv_sec = timeout / 1000;
757 tv->tv_usec = (timeout % 1000) * 1000;
762 if ( getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
763 ptr, (void *)&ret) < 0)
764 { perror("getsockopt"); ret = -1; }
768 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
770 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
771 #ifdef OPENSSL_SYS_WINDOWS
772 if ( data->_errno == WSAETIMEDOUT)
774 if ( data->_errno == EAGAIN)
784 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
785 if ( data->_errno == EMSGSIZE)
801 static int dgram_puts(BIO *bp, const char *str)
806 ret=dgram_write(bp,str,n);
810 #ifndef OPENSSL_NO_SCTP
811 BIO_METHOD *BIO_s_datagram_sctp(void)
813 return(&methods_dgramp_sctp);
816 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
819 int ret, optval = 20000;
820 int auth_data = 0, auth_forward = 0;
822 struct sctp_authchunk auth;
823 struct sctp_authchunks *authchunks;
824 socklen_t sockopt_len;
825 #ifdef SCTP_AUTHENTICATION_EVENT
827 struct sctp_event event;
829 struct sctp_event_subscribe event;
833 bio=BIO_new(BIO_s_datagram_sctp());
834 if (bio == NULL) return(NULL);
835 BIO_set_fd(bio,fd,close_flag);
837 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
838 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
839 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk));
840 OPENSSL_assert(ret >= 0);
841 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
842 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk));
843 OPENSSL_assert(ret >= 0);
845 /* Test if activation was successful. When using accept(),
846 * SCTP-AUTH has to be activated for the listening socket
847 * already, otherwise the connected socket won't use it. */
848 sockopt_len = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
849 authchunks = OPENSSL_malloc(sockopt_len);
850 memset(authchunks, 0, sizeof(sockopt_len));
851 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks, &sockopt_len);
852 OPENSSL_assert(ret >= 0);
854 for (p = (unsigned char*) authchunks + sizeof(sctp_assoc_t);
855 p < (unsigned char*) authchunks + sockopt_len;
856 p += sizeof(uint8_t))
858 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1;
859 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1;
862 OPENSSL_free(authchunks);
864 OPENSSL_assert(auth_data);
865 OPENSSL_assert(auth_forward);
867 #ifdef SCTP_AUTHENTICATION_EVENT
869 memset(&event, 0, sizeof(struct sctp_event));
870 event.se_assoc_id = 0;
871 event.se_type = SCTP_AUTHENTICATION_EVENT;
873 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
874 OPENSSL_assert(ret >= 0);
876 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
877 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
878 OPENSSL_assert(ret >= 0);
880 event.sctp_authentication_event = 1;
882 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
883 OPENSSL_assert(ret >= 0);
887 /* Disable partial delivery by setting the min size
888 * larger than the max record size of 2^14 + 2048 + 13
890 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval, sizeof(optval));
891 OPENSSL_assert(ret >= 0);
896 int BIO_dgram_is_sctp(BIO *bio)
898 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
901 static int dgram_sctp_new(BIO *bi)
903 bio_dgram_sctp_data *data = NULL;
907 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
910 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
911 #ifdef SCTP_PR_SCTP_NONE
912 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
920 static int dgram_sctp_free(BIO *a)
922 bio_dgram_sctp_data *data;
924 if (a == NULL) return(0);
925 if ( ! dgram_clear(a))
928 data = (bio_dgram_sctp_data *)a->ptr;
929 if(data != NULL) OPENSSL_free(data);
934 #ifdef SCTP_AUTHENTICATION_EVENT
935 void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp)
937 unsigned int sockopt_len = 0;
939 struct sctp_authkey_event* authkeyevent = &snp->sn_auth_event;
941 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY)
943 struct sctp_authkeyid authkeyid;
946 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
947 sockopt_len = sizeof(struct sctp_authkeyid);
948 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
949 &authkeyid, sockopt_len);
954 static int dgram_sctp_read(BIO *b, char *out, int outl)
956 int ret = 0, n = 0, i, optval;
958 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
959 union sctp_notification *snp;
962 struct cmsghdr *cmsg;
967 clear_socket_error();
971 memset(&data->rcvinfo, 0x00, sizeof(struct bio_dgram_sctp_rcvinfo));
978 msg.msg_control = cmsgbuf;
979 msg.msg_controllen = 512;
981 n = recvmsg(b->num, &msg, 0);
983 if (msg.msg_controllen > 0)
985 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg))
987 if (cmsg->cmsg_level != IPPROTO_SCTP)
990 if (cmsg->cmsg_type == SCTP_RCVINFO)
992 struct sctp_rcvinfo *rcvinfo;
994 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
995 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
996 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
997 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
998 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
999 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1000 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1001 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1005 if (cmsg->cmsg_type == SCTP_SNDRCV)
1007 struct sctp_sndrcvinfo *sndrcvinfo;
1009 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1010 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1011 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1012 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1013 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1014 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1015 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1016 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1029 if (msg.msg_flags & MSG_NOTIFICATION)
1031 snp = (union sctp_notification*) out;
1032 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT)
1035 struct sctp_event event;
1037 struct sctp_event_subscribe event;
1038 socklen_t eventsize;
1040 /* If a message has been delayed until the socket
1041 * is dry, it can be sent now.
1043 if (data->saved_message.length > 0)
1045 dgram_sctp_write(data->saved_message.bio, data->saved_message.data,
1046 data->saved_message.length);
1047 OPENSSL_free(data->saved_message.data);
1048 data->saved_message.length = 0;
1051 /* disable sender dry event */
1053 memset(&event, 0, sizeof(struct sctp_event));
1054 event.se_assoc_id = 0;
1055 event.se_type = SCTP_SENDER_DRY_EVENT;
1057 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1058 OPENSSL_assert(i >= 0);
1060 eventsize = sizeof(struct sctp_event_subscribe);
1061 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1062 OPENSSL_assert(i >= 0);
1064 event.sctp_sender_dry_event = 0;
1066 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1067 OPENSSL_assert(i >= 0);
1071 #ifdef SCTP_AUTHENTICATION_EVENT
1072 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1073 dgram_sctp_handle_auth_free_key_event(b, snp);
1076 if (data->handle_notifications != NULL)
1077 data->handle_notifications(b, data->notification_context, (void*) out);
1079 memset(out, 0, outl);
1084 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR) && (ret < outl));
1086 if (ret > 0 && !(msg.msg_flags & MSG_EOR))
1088 /* Partial message read, this should never happen! */
1090 /* The buffer was too small, this means the peer sent
1091 * a message that was larger than allowed. */
1095 /* Test if socket buffer can handle max record
1096 * size (2^14 + 2048 + 13)
1098 optlen = (socklen_t) sizeof(int);
1099 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1100 OPENSSL_assert(ret >= 0);
1101 OPENSSL_assert(optval >= 18445);
1103 /* Test if SCTP doesn't partially deliver below
1104 * max record size (2^14 + 2048 + 13)
1106 optlen = (socklen_t) sizeof(int);
1107 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1109 OPENSSL_assert(ret >= 0);
1110 OPENSSL_assert(optval >= 18445);
1112 /* Partially delivered notification??? Probably a bug.... */
1113 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1115 /* Everything seems ok till now, so it's most likely
1116 * a message dropped by PR-SCTP.
1118 memset(out, 0, outl);
1119 BIO_set_retry_read(b);
1123 BIO_clear_retry_flags(b);
1126 if (BIO_dgram_should_retry(ret))
1128 BIO_set_retry_read(b);
1129 data->_errno = get_last_socket_error();
1133 /* Test if peer uses SCTP-AUTH before continuing */
1134 if (!data->peer_auth_tested)
1136 int ii, auth_data = 0, auth_forward = 0;
1138 struct sctp_authchunks *authchunks;
1140 optlen = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1141 authchunks = OPENSSL_malloc(optlen);
1142 memset(authchunks, 0, sizeof(optlen));
1143 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS, authchunks, &optlen);
1144 OPENSSL_assert(ii >= 0);
1146 for (p = (unsigned char*) authchunks + sizeof(sctp_assoc_t);
1147 p < (unsigned char*) authchunks + optlen;
1148 p += sizeof(uint8_t))
1150 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1;
1151 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1;
1154 OPENSSL_free(authchunks);
1156 if (!auth_data || !auth_forward)
1158 BIOerr(BIO_F_BIO_READ,BIO_R_CONNECT_ERROR);
1162 data->peer_auth_tested = 1;
1168 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1171 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1172 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1173 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1174 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1175 struct iovec iov[1];
1177 struct cmsghdr *cmsg;
1178 #if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1179 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) + CMSG_SPACE(sizeof(struct sctp_prinfo))];
1180 struct sctp_sndinfo *sndinfo;
1181 struct sctp_prinfo *prinfo;
1183 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1184 struct sctp_sndrcvinfo *sndrcvinfo;
1187 clear_socket_error();
1189 /* If we're send anything else than application data,
1190 * disable all user parameters and flags.
1193 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1194 #ifdef SCTP_SACK_IMMEDIATELY
1195 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1197 sinfo = &handshake_sinfo;
1200 /* If we have to send a shutdown alert message and the
1201 * socket is not dry yet, we have to save it and send it
1202 * as soon as the socket gets dry.
1204 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b))
1206 data->saved_message.bio = b;
1207 data->saved_message.length = inl;
1208 data->saved_message.data = OPENSSL_malloc(inl);
1209 memcpy(data->saved_message.data, in, inl);
1213 iov[0].iov_base = (char *)in;
1214 iov[0].iov_len = inl;
1215 msg.msg_name = NULL;
1216 msg.msg_namelen = 0;
1219 msg.msg_control = (caddr_t)cmsgbuf;
1220 msg.msg_controllen = 0;
1222 #if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1223 cmsg = (struct cmsghdr *)cmsgbuf;
1224 cmsg->cmsg_level = IPPROTO_SCTP;
1225 cmsg->cmsg_type = SCTP_SNDINFO;
1226 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1227 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1228 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1229 sndinfo->snd_sid = sinfo->snd_sid;
1230 sndinfo->snd_flags = sinfo->snd_flags;
1231 sndinfo->snd_ppid = sinfo->snd_ppid;
1232 sndinfo->snd_context = sinfo->snd_context;
1233 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1235 cmsg = (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1236 cmsg->cmsg_level = IPPROTO_SCTP;
1237 cmsg->cmsg_type = SCTP_PRINFO;
1238 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1239 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1240 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1241 prinfo->pr_policy = pinfo->pr_policy;
1242 prinfo->pr_value = pinfo->pr_value;
1243 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1245 cmsg = (struct cmsghdr *)cmsgbuf;
1246 cmsg->cmsg_level = IPPROTO_SCTP;
1247 cmsg->cmsg_type = SCTP_SNDRCV;
1248 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1249 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1250 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1251 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1252 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1254 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1256 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1257 sndrcvinfo->sinfo_context = sinfo->snd_context;
1258 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1259 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1262 ret = sendmsg(b->num, &msg, 0);
1264 BIO_clear_retry_flags(b);
1267 if (BIO_dgram_should_retry(ret))
1269 BIO_set_retry_write(b);
1270 data->_errno = get_last_socket_error();
1276 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1279 bio_dgram_sctp_data *data = NULL;
1280 unsigned int sockopt_len = 0;
1281 struct sctp_authkeyid authkeyid;
1282 struct sctp_authkey *authkey;
1284 data = (bio_dgram_sctp_data *)b->ptr;
1288 case BIO_CTRL_DGRAM_QUERY_MTU:
1289 /* Set to maximum (2^14)
1290 * and ignore user input to enable transport
1291 * protocol fragmentation.
1292 * Returns always 2^14.
1297 case BIO_CTRL_DGRAM_SET_MTU:
1298 /* Set to maximum (2^14)
1299 * and ignore input to enable transport
1300 * protocol fragmentation.
1301 * Returns always 2^14.
1306 case BIO_CTRL_DGRAM_SET_CONNECTED:
1307 case BIO_CTRL_DGRAM_CONNECT:
1308 /* Returns always -1. */
1311 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1312 /* SCTP doesn't need the DTLS timer
1316 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1318 data->in_handshake = 1;
1320 data->in_handshake = 0;
1322 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY, &data->in_handshake, sizeof(int));
1324 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1325 /* New shared key for SCTP AUTH.
1326 * Returns 0 on success, -1 otherwise.
1329 /* Get active key */
1330 sockopt_len = sizeof(struct sctp_authkeyid);
1331 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1335 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1336 authkey = OPENSSL_malloc(sockopt_len);
1337 memset(authkey, 0x00, sockopt_len);
1338 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1340 /* This field is missing in FreeBSD 8.2 and earlier,
1341 * and FreeBSD 8.3 and higher work without it.
1343 authkey->sca_keylength = 64;
1345 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1347 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey, sockopt_len);
1350 /* Reset active key */
1351 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1352 &authkeyid, sizeof(struct sctp_authkeyid));
1356 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1357 /* Returns 0 on success, -1 otherwise. */
1359 /* Get active key */
1360 sockopt_len = sizeof(struct sctp_authkeyid);
1361 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1364 /* Set active key */
1365 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1366 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1367 &authkeyid, sizeof(struct sctp_authkeyid));
1370 /* CCS has been sent, so remember that and fall through
1371 * to check if we need to deactivate an old key
1375 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1376 /* Returns 0 on success, -1 otherwise. */
1378 /* Has this command really been called or is this just a fall-through? */
1379 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1382 /* CSS has been both, received and sent, so deactivate an old key */
1383 if (data->ccs_rcvd == 1 && data->ccs_sent == 1)
1385 /* Get active key */
1386 sockopt_len = sizeof(struct sctp_authkeyid);
1387 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1390 /* Deactivate key or delete second last key if
1391 * SCTP_AUTHENTICATION_EVENT is not available.
1393 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1394 #ifdef SCTP_AUTH_DEACTIVATE_KEY
1395 sockopt_len = sizeof(struct sctp_authkeyid);
1396 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1397 &authkeyid, sockopt_len);
1400 #ifndef SCTP_AUTHENTICATION_EVENT
1401 if (authkeyid.scact_keynumber > 0)
1403 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1404 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1405 &authkeyid, sizeof(struct sctp_authkeyid));
1414 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1415 /* Returns the size of the copied struct. */
1416 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo))
1417 num = sizeof(struct bio_dgram_sctp_sndinfo);
1419 memcpy(ptr, &(data->sndinfo), num);
1422 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1423 /* Returns the size of the copied struct. */
1424 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo))
1425 num = sizeof(struct bio_dgram_sctp_sndinfo);
1427 memcpy(&(data->sndinfo), ptr, num);
1429 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1430 /* Returns the size of the copied struct. */
1431 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo))
1432 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1434 memcpy(ptr, &data->rcvinfo, num);
1438 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1439 /* Returns the size of the copied struct. */
1440 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo))
1441 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1443 memcpy(&(data->rcvinfo), ptr, num);
1445 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1446 /* Returns the size of the copied struct. */
1447 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo))
1448 num = sizeof(struct bio_dgram_sctp_prinfo);
1450 memcpy(ptr, &(data->prinfo), num);
1453 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1454 /* Returns the size of the copied struct. */
1455 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo))
1456 num = sizeof(struct bio_dgram_sctp_prinfo);
1458 memcpy(&(data->prinfo), ptr, num);
1460 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1461 /* Returns always 1. */
1463 data->save_shutdown = 1;
1465 data->save_shutdown = 0;
1469 /* Pass to default ctrl function to
1470 * process SCTP unspecific commands
1472 ret=dgram_ctrl(b, cmd, num, ptr);
1478 int BIO_dgram_sctp_notification_cb(BIO *b,
1479 void (*handle_notifications)(BIO *bio, void *context, void *buf),
1482 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1484 if (handle_notifications != NULL)
1486 data->handle_notifications = handle_notifications;
1487 data->notification_context = context;
1495 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1498 int n, sockflags, ret;
1499 union sctp_notification snp;
1503 struct sctp_event event;
1505 struct sctp_event_subscribe event;
1506 socklen_t eventsize;
1508 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1510 /* set sender dry event */
1512 memset(&event, 0, sizeof(struct sctp_event));
1513 event.se_assoc_id = 0;
1514 event.se_type = SCTP_SENDER_DRY_EVENT;
1516 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1518 eventsize = sizeof(struct sctp_event_subscribe);
1519 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1523 event.sctp_sender_dry_event = 1;
1525 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1530 /* peek for notification */
1531 memset(&snp, 0x00, sizeof(union sctp_notification));
1532 iov.iov_base = (char *)&snp;
1533 iov.iov_len = sizeof(union sctp_notification);
1534 msg.msg_name = NULL;
1535 msg.msg_namelen = 0;
1538 msg.msg_control = NULL;
1539 msg.msg_controllen = 0;
1542 n = recvmsg(b->num, &msg, MSG_PEEK);
1545 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1551 /* if we find a notification, process it and try again if necessary */
1552 while (msg.msg_flags & MSG_NOTIFICATION)
1554 memset(&snp, 0x00, sizeof(union sctp_notification));
1555 iov.iov_base = (char *)&snp;
1556 iov.iov_len = sizeof(union sctp_notification);
1557 msg.msg_name = NULL;
1558 msg.msg_namelen = 0;
1561 msg.msg_control = NULL;
1562 msg.msg_controllen = 0;
1565 n = recvmsg(b->num, &msg, 0);
1568 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1574 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT)
1578 /* disable sender dry event */
1580 memset(&event, 0, sizeof(struct sctp_event));
1581 event.se_assoc_id = 0;
1582 event.se_type = SCTP_SENDER_DRY_EVENT;
1584 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1586 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1587 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1591 event.sctp_sender_dry_event = 0;
1593 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1599 #ifdef SCTP_AUTHENTICATION_EVENT
1600 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1601 dgram_sctp_handle_auth_free_key_event(b, &snp);
1604 if (data->handle_notifications != NULL)
1605 data->handle_notifications(b, data->notification_context, (void*) &snp);
1607 /* found notification, peek again */
1608 memset(&snp, 0x00, sizeof(union sctp_notification));
1609 iov.iov_base = (char *)&snp;
1610 iov.iov_len = sizeof(union sctp_notification);
1611 msg.msg_name = NULL;
1612 msg.msg_namelen = 0;
1615 msg.msg_control = NULL;
1616 msg.msg_controllen = 0;
1619 /* if we have seen the dry already, don't wait */
1622 sockflags = fcntl(b->num, F_GETFL, 0);
1623 fcntl(b->num, F_SETFL, O_NONBLOCK);
1626 n = recvmsg(b->num, &msg, MSG_PEEK);
1630 fcntl(b->num, F_SETFL, sockflags);
1635 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1642 /* read anything else */
1646 int BIO_dgram_sctp_msg_waiting(BIO *b)
1649 union sctp_notification snp;
1652 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1654 /* Check if there are any messages waiting to be read */
1657 memset(&snp, 0x00, sizeof(union sctp_notification));
1658 iov.iov_base = (char *)&snp;
1659 iov.iov_len = sizeof(union sctp_notification);
1660 msg.msg_name = NULL;
1661 msg.msg_namelen = 0;
1664 msg.msg_control = NULL;
1665 msg.msg_controllen = 0;
1668 sockflags = fcntl(b->num, F_GETFL, 0);
1669 fcntl(b->num, F_SETFL, O_NONBLOCK);
1670 n = recvmsg(b->num, &msg, MSG_PEEK);
1671 fcntl(b->num, F_SETFL, sockflags);
1673 /* if notification, process and try again */
1674 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION))
1676 #ifdef SCTP_AUTHENTICATION_EVENT
1677 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1678 dgram_sctp_handle_auth_free_key_event(b, &snp);
1681 memset(&snp, 0x00, sizeof(union sctp_notification));
1682 iov.iov_base = (char *)&snp;
1683 iov.iov_len = sizeof(union sctp_notification);
1684 msg.msg_name = NULL;
1685 msg.msg_namelen = 0;
1688 msg.msg_control = NULL;
1689 msg.msg_controllen = 0;
1691 n = recvmsg(b->num, &msg, 0);
1693 if (data->handle_notifications != NULL)
1694 data->handle_notifications(b, data->notification_context, (void*) &snp);
1697 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1699 /* Return 1 if there is a message to be read, return 0 otherwise. */
1706 static int dgram_sctp_puts(BIO *bp, const char *str)
1711 ret=dgram_sctp_write(bp,str,n);
1716 static int BIO_dgram_should_retry(int i)
1720 if ((i == 0) || (i == -1))
1722 err=get_last_socket_error();
1724 #if defined(OPENSSL_SYS_WINDOWS)
1725 /* If the socket return value (i) is -1
1726 * and err is unexpectedly 0 at this point,
1727 * the error code was overwritten by
1728 * another system call before this error
1729 * handling is called.
1733 return(BIO_dgram_non_fatal_error(err));
1738 int BIO_dgram_non_fatal_error(int err)
1742 #if defined(OPENSSL_SYS_WINDOWS)
1743 # if defined(WSAEWOULDBLOCK)
1744 case WSAEWOULDBLOCK:
1747 # if 0 /* This appears to always be an error */
1748 # if defined(WSAENOTCONN)
1755 # ifdef WSAEWOULDBLOCK
1756 # if WSAEWOULDBLOCK != EWOULDBLOCK
1769 #if EWOULDBLOCK != EAGAIN
1794 static void get_current_time(struct timeval *t)
1796 #ifdef OPENSSL_SYS_WIN32
1799 t->tv_sec = (long)tb.time;
1800 t->tv_usec = (long)tb.millitm * 1000;
1801 #elif defined(OPENSSL_SYS_VMS)
1804 t->tv_sec = (long)tb.time;
1805 t->tv_usec = (long)tb.millitm * 1000;
1807 gettimeofday(t, NULL);