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(_WIN32) || defined(OPENSSL_SYS_VMS))
70 # include <sys/time.h>
72 #if defined(OPENSSL_SYS_VMS)
73 #include <sys/timeb.h>
76 #ifndef OPENSSL_NO_SCTP
77 #include <netinet/sctp.h>
79 #define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
80 #define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
83 #if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
84 #define IP_MTU 14 /* linux is lame */
87 #if OPENSSL_USE_IPV6 && !defined(IPPROTO_IPV6)
88 #define IPPROTO_IPV6 41 /* windows is lame */
91 #if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
92 /* Standard definition causes type-punning problems. */
93 #undef IN6_IS_ADDR_V4MAPPED
94 #define s6_addr32 __u6_addr.__u6_addr32
95 #define IN6_IS_ADDR_V4MAPPED(a) \
96 (((a)->s6_addr32[0] == 0) && \
97 ((a)->s6_addr32[1] == 0) && \
98 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
102 #define sock_write SockWrite /* Watt-32 uses same names */
103 #define sock_read SockRead
104 #define sock_puts SockPuts
107 static int dgram_write(BIO *h, const char *buf, int num);
108 static int dgram_read(BIO *h, char *buf, int size);
109 static int dgram_puts(BIO *h, const char *str);
110 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
111 static int dgram_new(BIO *h);
112 static int dgram_free(BIO *data);
113 static int dgram_clear(BIO *bio);
115 #ifndef OPENSSL_NO_SCTP
116 static int dgram_sctp_write(BIO *h, const char *buf, int num);
117 static int dgram_sctp_read(BIO *h, char *buf, int size);
118 static int dgram_sctp_puts(BIO *h, const char *str);
119 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
120 static int dgram_sctp_new(BIO *h);
121 static int dgram_sctp_free(BIO *data);
122 #ifdef SCTP_AUTHENTICATION_EVENT
123 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp);
127 static int BIO_dgram_should_retry(int s);
129 static void get_current_time(struct timeval *t);
131 static BIO_METHOD methods_dgramp=
138 NULL, /* dgram_gets, */
145 #ifndef OPENSSL_NO_SCTP
146 static BIO_METHOD methods_dgramp_sctp=
149 "datagram sctp socket",
153 NULL, /* dgram_gets, */
161 typedef struct bio_dgram_data_st
165 struct sockaddr_in sa_in;
167 struct sockaddr_in6 sa_in6;
170 unsigned int connected;
173 struct timeval next_timeout;
174 struct timeval socket_timeout;
177 #ifndef OPENSSL_NO_SCTP
178 typedef struct bio_dgram_sctp_save_message_st
183 } bio_dgram_sctp_save_message;
185 typedef struct bio_dgram_sctp_data_st
189 struct sockaddr_in sa_in;
191 struct sockaddr_in6 sa_in6;
194 unsigned int connected;
197 struct bio_dgram_sctp_sndinfo sndinfo;
198 struct bio_dgram_sctp_rcvinfo rcvinfo;
199 struct bio_dgram_sctp_prinfo prinfo;
200 void (*handle_notifications)(BIO *bio, void *context, void *buf);
201 void* notification_context;
206 int peer_auth_tested;
207 bio_dgram_sctp_save_message saved_message;
208 } bio_dgram_sctp_data;
211 BIO_METHOD *BIO_s_datagram(void)
213 return(&methods_dgramp);
216 BIO *BIO_new_dgram(int fd, int close_flag)
220 ret=BIO_new(BIO_s_datagram());
221 if (ret == NULL) return(NULL);
222 BIO_set_fd(ret,fd,close_flag);
226 static int dgram_new(BIO *bi)
228 bio_dgram_data *data = NULL;
232 data = OPENSSL_malloc(sizeof(bio_dgram_data));
235 memset(data, 0x00, sizeof(bio_dgram_data));
242 static int dgram_free(BIO *a)
244 bio_dgram_data *data;
246 if (a == NULL) return(0);
247 if ( ! dgram_clear(a))
250 data = (bio_dgram_data *)a->ptr;
251 if(data != NULL) OPENSSL_free(data);
256 static int dgram_clear(BIO *a)
258 if (a == NULL) return(0);
271 static void dgram_adjust_rcv_timeout(BIO *b)
273 #if defined(SO_RCVTIMEO)
274 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
275 union { size_t s; int i; } sz = {0};
277 /* Is a timer active? */
278 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0)
280 struct timeval timenow, timeleft;
282 /* Read current socket timeout */
283 #ifdef OPENSSL_SYS_WINDOWS
286 sz.i = sizeof(timeout);
287 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
288 (void*)&timeout, &sz.i) < 0)
289 { perror("getsockopt"); }
292 data->socket_timeout.tv_sec = timeout / 1000;
293 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
296 sz.i = sizeof(data->socket_timeout);
297 if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
298 &(data->socket_timeout), (void *)&sz) < 0)
299 { perror("getsockopt"); }
300 else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0)
301 OPENSSL_assert(sz.s<=sizeof(data->socket_timeout));
304 /* Get current time */
305 get_current_time(&timenow);
307 /* Calculate time left until timer expires */
308 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
309 timeleft.tv_sec -= timenow.tv_sec;
310 timeleft.tv_usec -= timenow.tv_usec;
311 if (timeleft.tv_usec < 0)
314 timeleft.tv_usec += 1000000;
317 if (timeleft.tv_sec < 0)
320 timeleft.tv_usec = 1;
323 /* Adjust socket timeout if next handhake message timer
324 * will expire earlier.
326 if ((data->socket_timeout.tv_sec == 0 && data->socket_timeout.tv_usec == 0) ||
327 (data->socket_timeout.tv_sec > timeleft.tv_sec) ||
328 (data->socket_timeout.tv_sec == timeleft.tv_sec &&
329 data->socket_timeout.tv_usec >= timeleft.tv_usec))
331 #ifdef OPENSSL_SYS_WINDOWS
332 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
333 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
334 (void*)&timeout, sizeof(timeout)) < 0)
335 { perror("setsockopt"); }
337 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
338 sizeof(struct timeval)) < 0)
339 { perror("setsockopt"); }
346 static void dgram_reset_rcv_timeout(BIO *b)
348 #if defined(SO_RCVTIMEO)
349 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
351 /* Is a timer active? */
352 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0)
354 #ifdef OPENSSL_SYS_WINDOWS
355 int timeout = data->socket_timeout.tv_sec * 1000 +
356 data->socket_timeout.tv_usec / 1000;
357 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
358 (void*)&timeout, sizeof(timeout)) < 0)
359 { perror("setsockopt"); }
361 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
362 sizeof(struct timeval)) < 0)
363 { perror("setsockopt"); }
369 static int dgram_read(BIO *b, char *out, int outl)
372 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
376 * See commentary in b_sock.c. <appro>
378 union { size_t s; int i; } len;
381 struct sockaddr_in sa_in;
383 struct sockaddr_in6 sa_in6;
389 sa.len.i=sizeof(sa.peer);
393 clear_socket_error();
394 memset(&sa.peer, 0x00, sizeof(sa.peer));
395 dgram_adjust_rcv_timeout(b);
396 ret=recvfrom(b->num,out,outl,0,&sa.peer.sa,(void *)&sa.len);
397 if (sizeof(sa.len.i)!=sizeof(sa.len.s) && sa.len.i==0)
399 OPENSSL_assert(sa.len.s<=sizeof(sa.peer));
400 sa.len.i = (int)sa.len.s;
403 if ( ! data->connected && ret >= 0)
404 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
406 BIO_clear_retry_flags(b);
409 if (BIO_dgram_should_retry(ret))
411 BIO_set_retry_read(b);
412 data->_errno = get_last_socket_error();
416 dgram_reset_rcv_timeout(b);
421 static int dgram_write(BIO *b, const char *in, int inl)
424 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
425 clear_socket_error();
427 if ( data->connected )
428 ret=writesocket(b->num,in,inl);
431 int peerlen = sizeof(data->peer);
433 if (data->peer.sa.sa_family == AF_INET)
434 peerlen = sizeof(data->peer.sa_in);
436 else if (data->peer.sa.sa_family == AF_INET6)
437 peerlen = sizeof(data->peer.sa_in6);
439 #if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
440 ret=sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
442 ret=sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
446 BIO_clear_retry_flags(b);
449 if (BIO_dgram_should_retry(ret))
451 BIO_set_retry_write(b);
452 data->_errno = get_last_socket_error();
454 #if 0 /* higher layers are responsible for querying MTU, if necessary */
455 if ( data->_errno == EMSGSIZE)
456 /* retrieve the new MTU */
457 BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
464 static long dgram_get_mtu_overhead(bio_dgram_data *data)
468 switch (data->peer.sa.sa_family)
471 /* Assume this is UDP - 20 bytes for IP, 8 bytes for UDP */
476 #ifdef IN6_IS_ADDR_V4MAPPED
477 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
478 /* Assume this is UDP - 20 bytes for IP, 8 bytes for UDP */
482 /* Assume this is UDP - 40 bytes for IP, 8 bytes for UDP */
487 /* We don't know. Go with the historical default */
494 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
498 struct sockaddr *to = NULL;
499 bio_dgram_data *data = NULL;
501 #if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
502 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
503 * modern enough to define socklen_t */
507 struct sockaddr_in s4;
509 struct sockaddr_in6 s6;
514 data = (bio_dgram_data *)b->ptr;
520 case BIO_C_FILE_SEEK:
523 case BIO_C_FILE_TELL:
529 b->num= *((int *)ptr);
530 b->shutdown=(int)num;
537 if (ip != NULL) *ip=b->num;
543 case BIO_CTRL_GET_CLOSE:
546 case BIO_CTRL_SET_CLOSE:
547 b->shutdown=(int)num;
549 case BIO_CTRL_PENDING:
550 case BIO_CTRL_WPENDING:
557 case BIO_CTRL_DGRAM_CONNECT:
558 to = (struct sockaddr *)ptr;
560 if (connect(b->num, to, sizeof(struct sockaddr)) < 0)
561 { perror("connect"); ret = 0; }
565 switch (to->sa_family)
568 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
572 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
576 memcpy(&data->peer,to,sizeof(data->peer.sa));
583 /* (Linux)kernel sets DF bit on outgoing IP packets */
584 case BIO_CTRL_DGRAM_MTU_DISCOVER:
585 #if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
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 switch (addr.sa.sa_family)
596 sockopt_val = IP_PMTUDISC_DO;
597 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
598 &sockopt_val, sizeof(sockopt_val))) < 0)
599 perror("setsockopt");
601 #if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
603 sockopt_val = IPV6_PMTUDISC_DO;
604 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
605 &sockopt_val, sizeof(sockopt_val))) < 0)
606 perror("setsockopt");
617 case BIO_CTRL_DGRAM_QUERY_MTU:
618 #if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
619 addr_len = (socklen_t)sizeof(addr);
620 memset((void *)&addr, 0, sizeof(addr));
621 if (getsockname(b->num, &addr.sa, &addr_len) < 0)
626 sockopt_len = sizeof(sockopt_val);
627 switch (addr.sa.sa_family)
630 if ((ret = getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
631 &sockopt_len)) < 0 || sockopt_val < 0)
637 /* we assume that the transport protocol is UDP and no
638 * IP options are used.
640 data->mtu = sockopt_val - 8 - 20;
644 #if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
646 if ((ret = getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU, (void *)&sockopt_val,
647 &sockopt_len)) < 0 || sockopt_val < 0)
653 /* we assume that the transport protocol is UDP and no
654 * IPV6 options are used.
656 data->mtu = sockopt_val - 8 - 40;
669 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
670 ret = -dgram_get_mtu_overhead(data);
671 switch (data->peer.sa.sa_family)
678 #ifdef IN6_IS_ADDR_V4MAPPED
679 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
691 case BIO_CTRL_DGRAM_GET_MTU:
694 case BIO_CTRL_DGRAM_SET_MTU:
698 case BIO_CTRL_DGRAM_SET_CONNECTED:
699 to = (struct sockaddr *)ptr;
704 switch (to->sa_family)
707 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
711 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
715 memcpy(&data->peer,to,sizeof(data->peer.sa));
722 memset(&(data->peer), 0x00, sizeof(data->peer));
725 case BIO_CTRL_DGRAM_GET_PEER:
726 switch (data->peer.sa.sa_family)
729 ret=sizeof(data->peer.sa_in);
733 ret=sizeof(data->peer.sa_in6);
737 ret=sizeof(data->peer.sa);
740 if (num==0 || num>ret)
742 memcpy(ptr,&data->peer,(ret=num));
744 case BIO_CTRL_DGRAM_SET_PEER:
745 to = (struct sockaddr *) ptr;
746 switch (to->sa_family)
749 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
753 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
757 memcpy(&data->peer,to,sizeof(data->peer.sa));
761 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
762 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
764 #if defined(SO_RCVTIMEO)
765 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
766 #ifdef OPENSSL_SYS_WINDOWS
768 struct timeval *tv = (struct timeval *)ptr;
769 int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
770 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
771 (void*)&timeout, sizeof(timeout)) < 0)
772 { perror("setsockopt"); ret = -1; }
775 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
776 sizeof(struct timeval)) < 0)
777 { perror("setsockopt"); ret = -1; }
780 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
782 union { size_t s; int i; } sz = {0};
783 #ifdef OPENSSL_SYS_WINDOWS
785 struct timeval *tv = (struct timeval *)ptr;
787 sz.i = sizeof(timeout);
788 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
789 (void*)&timeout, &sz.i) < 0)
790 { perror("getsockopt"); ret = -1; }
793 tv->tv_sec = timeout / 1000;
794 tv->tv_usec = (timeout % 1000) * 1000;
798 sz.i = sizeof(struct timeval);
799 if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
800 ptr, (void *)&sz) < 0)
801 { perror("getsockopt"); ret = -1; }
802 else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0)
804 OPENSSL_assert(sz.s<=sizeof(struct timeval));
813 #if defined(SO_SNDTIMEO)
814 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
815 #ifdef OPENSSL_SYS_WINDOWS
817 struct timeval *tv = (struct timeval *)ptr;
818 int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
819 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
820 (void*)&timeout, sizeof(timeout)) < 0)
821 { perror("setsockopt"); ret = -1; }
824 if ( setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
825 sizeof(struct timeval)) < 0)
826 { perror("setsockopt"); ret = -1; }
829 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
831 union { size_t s; int i; } sz = {0};
832 #ifdef OPENSSL_SYS_WINDOWS
834 struct timeval *tv = (struct timeval *)ptr;
836 sz.i = sizeof(timeout);
837 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
838 (void*)&timeout, &sz.i) < 0)
839 { perror("getsockopt"); ret = -1; }
842 tv->tv_sec = timeout / 1000;
843 tv->tv_usec = (timeout % 1000) * 1000;
847 sz.i = sizeof(struct timeval);
848 if ( getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
849 ptr, (void *)&sz) < 0)
850 { perror("getsockopt"); ret = -1; }
851 else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0)
853 OPENSSL_assert(sz.s<=sizeof(struct timeval));
862 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
864 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
865 #ifdef OPENSSL_SYS_WINDOWS
866 if ( data->_errno == WSAETIMEDOUT)
868 if ( data->_errno == EAGAIN)
878 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
879 if ( data->_errno == EMSGSIZE)
888 case BIO_CTRL_DGRAM_SET_DONT_FRAG:
889 sockopt_val = num ? 1 : 0;
891 switch (data->peer.sa.sa_family)
894 #if defined(IP_DONTFRAG)
895 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG,
896 &sockopt_val, sizeof(sockopt_val))) < 0)
897 { perror("setsockopt"); ret = -1; }
898 #elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTUDISCOVER)
899 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
900 (ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
901 &sockopt_val, sizeof(sockopt_val))) < 0)
902 { perror("setsockopt"); ret = -1; }
903 #elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT)
904 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT,
905 (const char *)&sockopt_val, sizeof(sockopt_val))) < 0)
906 { perror("setsockopt"); ret = -1; }
913 #if defined(IPV6_DONTFRAG)
914 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
915 (const void *)&sockopt_val, sizeof(sockopt_val))) < 0)
916 { perror("setsockopt"); ret = -1; }
917 #elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER)
918 if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT),
919 (ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
920 &sockopt_val, sizeof(sockopt_val))) < 0)
921 { perror("setsockopt"); ret = -1; }
932 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
933 ret = dgram_get_mtu_overhead(data);
942 static int dgram_puts(BIO *bp, const char *str)
947 ret=dgram_write(bp,str,n);
951 #ifndef OPENSSL_NO_SCTP
952 BIO_METHOD *BIO_s_datagram_sctp(void)
954 return(&methods_dgramp_sctp);
957 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
960 int ret, optval = 20000;
961 int auth_data = 0, auth_forward = 0;
963 struct sctp_authchunk auth;
964 struct sctp_authchunks *authchunks;
965 socklen_t sockopt_len;
966 #ifdef SCTP_AUTHENTICATION_EVENT
968 struct sctp_event event;
970 struct sctp_event_subscribe event;
974 bio=BIO_new(BIO_s_datagram_sctp());
975 if (bio == NULL) return(NULL);
976 BIO_set_fd(bio,fd,close_flag);
978 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
979 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
980 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk));
986 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
987 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk));
994 /* Test if activation was successful. When using accept(),
995 * SCTP-AUTH has to be activated for the listening socket
996 * already, otherwise the connected socket won't use it. */
997 sockopt_len = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
998 authchunks = OPENSSL_malloc(sockopt_len);
999 memset(authchunks, 0, sockopt_len);
1000 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks, &sockopt_len);
1004 OPENSSL_free(authchunks);
1009 for (p = (unsigned char*) authchunks->gauth_chunks;
1010 p < (unsigned char*) authchunks + sockopt_len;
1011 p += sizeof(uint8_t))
1013 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1;
1014 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1;
1017 OPENSSL_free(authchunks);
1019 OPENSSL_assert(auth_data);
1020 OPENSSL_assert(auth_forward);
1022 #ifdef SCTP_AUTHENTICATION_EVENT
1024 memset(&event, 0, sizeof(struct sctp_event));
1025 event.se_assoc_id = 0;
1026 event.se_type = SCTP_AUTHENTICATION_EVENT;
1028 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1035 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
1036 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
1043 event.sctp_authentication_event = 1;
1045 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1054 /* Disable partial delivery by setting the min size
1055 * larger than the max record size of 2^14 + 2048 + 13
1057 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval, sizeof(optval));
1067 int BIO_dgram_is_sctp(BIO *bio)
1069 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
1072 static int dgram_sctp_new(BIO *bi)
1074 bio_dgram_sctp_data *data = NULL;
1078 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
1081 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
1082 #ifdef SCTP_PR_SCTP_NONE
1083 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1091 static int dgram_sctp_free(BIO *a)
1093 bio_dgram_sctp_data *data;
1095 if (a == NULL) return(0);
1096 if ( ! dgram_clear(a))
1099 data = (bio_dgram_sctp_data *)a->ptr;
1102 if(data->saved_message.data != NULL)
1103 OPENSSL_free(data->saved_message.data);
1110 #ifdef SCTP_AUTHENTICATION_EVENT
1111 void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp)
1114 struct sctp_authkey_event* authkeyevent = &snp->sn_auth_event;
1116 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY)
1118 struct sctp_authkeyid authkeyid;
1121 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1122 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1123 &authkeyid, sizeof(struct sctp_authkeyid));
1128 static int dgram_sctp_read(BIO *b, char *out, int outl)
1130 int ret = 0, n = 0, i, optval;
1132 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1133 union sctp_notification *snp;
1136 struct cmsghdr *cmsg;
1141 clear_socket_error();
1145 memset(&data->rcvinfo, 0x00, sizeof(struct bio_dgram_sctp_rcvinfo));
1148 msg.msg_name = NULL;
1149 msg.msg_namelen = 0;
1152 msg.msg_control = cmsgbuf;
1153 msg.msg_controllen = 512;
1155 n = recvmsg(b->num, &msg, 0);
1164 if (msg.msg_controllen > 0)
1166 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg))
1168 if (cmsg->cmsg_level != IPPROTO_SCTP)
1171 if (cmsg->cmsg_type == SCTP_RCVINFO)
1173 struct sctp_rcvinfo *rcvinfo;
1175 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1176 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1177 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1178 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1179 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1180 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1181 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1182 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1186 if (cmsg->cmsg_type == SCTP_SNDRCV)
1188 struct sctp_sndrcvinfo *sndrcvinfo;
1190 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1191 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1192 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1193 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1194 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1195 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1196 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1197 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1203 if (msg.msg_flags & MSG_NOTIFICATION)
1205 snp = (union sctp_notification*) out;
1206 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT)
1209 struct sctp_event event;
1211 struct sctp_event_subscribe event;
1212 socklen_t eventsize;
1214 /* If a message has been delayed until the socket
1215 * is dry, it can be sent now.
1217 if (data->saved_message.length > 0)
1219 dgram_sctp_write(data->saved_message.bio, data->saved_message.data,
1220 data->saved_message.length);
1221 OPENSSL_free(data->saved_message.data);
1222 data->saved_message.data = NULL;
1223 data->saved_message.length = 0;
1226 /* disable sender dry event */
1228 memset(&event, 0, sizeof(struct sctp_event));
1229 event.se_assoc_id = 0;
1230 event.se_type = SCTP_SENDER_DRY_EVENT;
1232 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1239 eventsize = sizeof(struct sctp_event_subscribe);
1240 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1247 event.sctp_sender_dry_event = 0;
1249 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1258 #ifdef SCTP_AUTHENTICATION_EVENT
1259 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1260 dgram_sctp_handle_auth_free_key_event(b, snp);
1263 if (data->handle_notifications != NULL)
1264 data->handle_notifications(b, data->notification_context, (void*) out);
1266 memset(out, 0, outl);
1271 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR) && (ret < outl));
1273 if (ret > 0 && !(msg.msg_flags & MSG_EOR))
1275 /* Partial message read, this should never happen! */
1277 /* The buffer was too small, this means the peer sent
1278 * a message that was larger than allowed. */
1282 /* Test if socket buffer can handle max record
1283 * size (2^14 + 2048 + 13)
1285 optlen = (socklen_t) sizeof(int);
1286 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1288 OPENSSL_assert(optval >= 18445);
1290 /* Test if SCTP doesn't partially deliver below
1291 * max record size (2^14 + 2048 + 13)
1293 optlen = (socklen_t) sizeof(int);
1294 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1297 OPENSSL_assert(optval >= 18445);
1299 /* Partially delivered notification??? Probably a bug.... */
1300 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1302 /* Everything seems ok till now, so it's most likely
1303 * a message dropped by PR-SCTP.
1305 memset(out, 0, outl);
1306 BIO_set_retry_read(b);
1310 BIO_clear_retry_flags(b);
1313 if (BIO_dgram_should_retry(ret))
1315 BIO_set_retry_read(b);
1316 data->_errno = get_last_socket_error();
1320 /* Test if peer uses SCTP-AUTH before continuing */
1321 if (!data->peer_auth_tested)
1323 int ii, auth_data = 0, auth_forward = 0;
1325 struct sctp_authchunks *authchunks;
1327 optlen = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1328 authchunks = OPENSSL_malloc(optlen);
1329 memset(authchunks, 0, optlen);
1330 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS, authchunks, &optlen);
1333 for (p = (unsigned char*) authchunks->gauth_chunks;
1334 p < (unsigned char*) authchunks + optlen;
1335 p += sizeof(uint8_t))
1337 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1;
1338 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1;
1341 OPENSSL_free(authchunks);
1343 if (!auth_data || !auth_forward)
1345 BIOerr(BIO_F_DGRAM_SCTP_READ,BIO_R_CONNECT_ERROR);
1349 data->peer_auth_tested = 1;
1355 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1358 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1359 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1360 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1361 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1362 struct iovec iov[1];
1364 struct cmsghdr *cmsg;
1365 #if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1366 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) + CMSG_SPACE(sizeof(struct sctp_prinfo))];
1367 struct sctp_sndinfo *sndinfo;
1368 struct sctp_prinfo *prinfo;
1370 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1371 struct sctp_sndrcvinfo *sndrcvinfo;
1374 clear_socket_error();
1376 /* If we're send anything else than application data,
1377 * disable all user parameters and flags.
1380 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1381 #ifdef SCTP_SACK_IMMEDIATELY
1382 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1384 sinfo = &handshake_sinfo;
1387 /* If we have to send a shutdown alert message and the
1388 * socket is not dry yet, we have to save it and send it
1389 * as soon as the socket gets dry.
1391 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b))
1393 data->saved_message.bio = b;
1394 if (data->saved_message.data)
1395 OPENSSL_free(data->saved_message.data);
1396 data->saved_message.data = OPENSSL_malloc(inl);
1397 memcpy(data->saved_message.data, in, inl);
1398 data->saved_message.length = inl;
1402 iov[0].iov_base = (char *)in;
1403 iov[0].iov_len = inl;
1404 msg.msg_name = NULL;
1405 msg.msg_namelen = 0;
1408 msg.msg_control = (caddr_t)cmsgbuf;
1409 msg.msg_controllen = 0;
1411 #if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1412 cmsg = (struct cmsghdr *)cmsgbuf;
1413 cmsg->cmsg_level = IPPROTO_SCTP;
1414 cmsg->cmsg_type = SCTP_SNDINFO;
1415 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1416 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1417 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1418 sndinfo->snd_sid = sinfo->snd_sid;
1419 sndinfo->snd_flags = sinfo->snd_flags;
1420 sndinfo->snd_ppid = sinfo->snd_ppid;
1421 sndinfo->snd_context = sinfo->snd_context;
1422 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1424 cmsg = (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1425 cmsg->cmsg_level = IPPROTO_SCTP;
1426 cmsg->cmsg_type = SCTP_PRINFO;
1427 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1428 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1429 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1430 prinfo->pr_policy = pinfo->pr_policy;
1431 prinfo->pr_value = pinfo->pr_value;
1432 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1434 cmsg = (struct cmsghdr *)cmsgbuf;
1435 cmsg->cmsg_level = IPPROTO_SCTP;
1436 cmsg->cmsg_type = SCTP_SNDRCV;
1437 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1438 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1439 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1440 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1441 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1443 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1445 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1446 sndrcvinfo->sinfo_context = sinfo->snd_context;
1447 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1448 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1451 ret = sendmsg(b->num, &msg, 0);
1453 BIO_clear_retry_flags(b);
1456 if (BIO_dgram_should_retry(ret))
1458 BIO_set_retry_write(b);
1459 data->_errno = get_last_socket_error();
1465 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1468 bio_dgram_sctp_data *data = NULL;
1469 socklen_t sockopt_len = 0;
1470 struct sctp_authkeyid authkeyid;
1471 struct sctp_authkey *authkey = NULL;
1473 data = (bio_dgram_sctp_data *)b->ptr;
1477 case BIO_CTRL_DGRAM_QUERY_MTU:
1478 /* Set to maximum (2^14)
1479 * and ignore user input to enable transport
1480 * protocol fragmentation.
1481 * Returns always 2^14.
1486 case BIO_CTRL_DGRAM_SET_MTU:
1487 /* Set to maximum (2^14)
1488 * and ignore input to enable transport
1489 * protocol fragmentation.
1490 * Returns always 2^14.
1495 case BIO_CTRL_DGRAM_SET_CONNECTED:
1496 case BIO_CTRL_DGRAM_CONNECT:
1497 /* Returns always -1. */
1500 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1501 /* SCTP doesn't need the DTLS timer
1505 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1506 /* We allow transport protocol fragmentation so this is irrelevant */
1509 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1511 data->in_handshake = 1;
1513 data->in_handshake = 0;
1515 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY, &data->in_handshake, sizeof(int));
1517 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1518 /* New shared key for SCTP AUTH.
1519 * Returns 0 on success, -1 otherwise.
1522 /* Get active key */
1523 sockopt_len = sizeof(struct sctp_authkeyid);
1524 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1528 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1529 authkey = OPENSSL_malloc(sockopt_len);
1530 if (authkey == NULL)
1535 memset(authkey, 0x00, sockopt_len);
1536 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1538 /* This field is missing in FreeBSD 8.2 and earlier,
1539 * and FreeBSD 8.3 and higher work without it.
1541 authkey->sca_keylength = 64;
1543 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1545 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey, sockopt_len);
1546 OPENSSL_free(authkey);
1550 /* Reset active key */
1551 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1552 &authkeyid, sizeof(struct sctp_authkeyid));
1556 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1557 /* Returns 0 on success, -1 otherwise. */
1559 /* Get active key */
1560 sockopt_len = sizeof(struct sctp_authkeyid);
1561 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1564 /* Set active key */
1565 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1566 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1567 &authkeyid, sizeof(struct sctp_authkeyid));
1570 /* CCS has been sent, so remember that and fall through
1571 * to check if we need to deactivate an old key
1575 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1576 /* Returns 0 on success, -1 otherwise. */
1578 /* Has this command really been called or is this just a fall-through? */
1579 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1582 /* CSS has been both, received and sent, so deactivate an old key */
1583 if (data->ccs_rcvd == 1 && data->ccs_sent == 1)
1585 /* Get active key */
1586 sockopt_len = sizeof(struct sctp_authkeyid);
1587 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1590 /* Deactivate key or delete second last key if
1591 * SCTP_AUTHENTICATION_EVENT is not available.
1593 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1594 #ifdef SCTP_AUTH_DEACTIVATE_KEY
1595 sockopt_len = sizeof(struct sctp_authkeyid);
1596 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1597 &authkeyid, sockopt_len);
1600 #ifndef SCTP_AUTHENTICATION_EVENT
1601 if (authkeyid.scact_keynumber > 0)
1603 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1604 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1605 &authkeyid, sizeof(struct sctp_authkeyid));
1614 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1615 /* Returns the size of the copied struct. */
1616 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo))
1617 num = sizeof(struct bio_dgram_sctp_sndinfo);
1619 memcpy(ptr, &(data->sndinfo), num);
1622 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1623 /* Returns the size of the copied struct. */
1624 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo))
1625 num = sizeof(struct bio_dgram_sctp_sndinfo);
1627 memcpy(&(data->sndinfo), ptr, num);
1629 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1630 /* Returns the size of the copied struct. */
1631 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo))
1632 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1634 memcpy(ptr, &data->rcvinfo, num);
1638 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1639 /* Returns the size of the copied struct. */
1640 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo))
1641 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1643 memcpy(&(data->rcvinfo), ptr, num);
1645 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1646 /* Returns the size of the copied struct. */
1647 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo))
1648 num = sizeof(struct bio_dgram_sctp_prinfo);
1650 memcpy(ptr, &(data->prinfo), num);
1653 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1654 /* Returns the size of the copied struct. */
1655 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo))
1656 num = sizeof(struct bio_dgram_sctp_prinfo);
1658 memcpy(&(data->prinfo), ptr, num);
1660 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1661 /* Returns always 1. */
1663 data->save_shutdown = 1;
1665 data->save_shutdown = 0;
1669 /* Pass to default ctrl function to
1670 * process SCTP unspecific commands
1672 ret=dgram_ctrl(b, cmd, num, ptr);
1678 int BIO_dgram_sctp_notification_cb(BIO *b,
1679 void (*handle_notifications)(BIO *bio, void *context, void *buf),
1682 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1684 if (handle_notifications != NULL)
1686 data->handle_notifications = handle_notifications;
1687 data->notification_context = context;
1695 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1698 int n, sockflags, ret;
1699 union sctp_notification snp;
1703 struct sctp_event event;
1705 struct sctp_event_subscribe event;
1706 socklen_t eventsize;
1708 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1710 /* set sender dry event */
1712 memset(&event, 0, sizeof(struct sctp_event));
1713 event.se_assoc_id = 0;
1714 event.se_type = SCTP_SENDER_DRY_EVENT;
1716 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1718 eventsize = sizeof(struct sctp_event_subscribe);
1719 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1723 event.sctp_sender_dry_event = 1;
1725 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1730 /* peek for notification */
1731 memset(&snp, 0x00, sizeof(union sctp_notification));
1732 iov.iov_base = (char *)&snp;
1733 iov.iov_len = sizeof(union sctp_notification);
1734 msg.msg_name = NULL;
1735 msg.msg_namelen = 0;
1738 msg.msg_control = NULL;
1739 msg.msg_controllen = 0;
1742 n = recvmsg(b->num, &msg, MSG_PEEK);
1745 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1751 /* if we find a notification, process it and try again if necessary */
1752 while (msg.msg_flags & MSG_NOTIFICATION)
1754 memset(&snp, 0x00, sizeof(union sctp_notification));
1755 iov.iov_base = (char *)&snp;
1756 iov.iov_len = sizeof(union sctp_notification);
1757 msg.msg_name = NULL;
1758 msg.msg_namelen = 0;
1761 msg.msg_control = NULL;
1762 msg.msg_controllen = 0;
1765 n = recvmsg(b->num, &msg, 0);
1768 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1774 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT)
1778 /* disable sender dry event */
1780 memset(&event, 0, sizeof(struct sctp_event));
1781 event.se_assoc_id = 0;
1782 event.se_type = SCTP_SENDER_DRY_EVENT;
1784 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1786 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1787 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1791 event.sctp_sender_dry_event = 0;
1793 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1799 #ifdef SCTP_AUTHENTICATION_EVENT
1800 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1801 dgram_sctp_handle_auth_free_key_event(b, &snp);
1804 if (data->handle_notifications != NULL)
1805 data->handle_notifications(b, data->notification_context, (void*) &snp);
1807 /* found notification, peek again */
1808 memset(&snp, 0x00, sizeof(union sctp_notification));
1809 iov.iov_base = (char *)&snp;
1810 iov.iov_len = sizeof(union sctp_notification);
1811 msg.msg_name = NULL;
1812 msg.msg_namelen = 0;
1815 msg.msg_control = NULL;
1816 msg.msg_controllen = 0;
1819 /* if we have seen the dry already, don't wait */
1822 sockflags = fcntl(b->num, F_GETFL, 0);
1823 fcntl(b->num, F_SETFL, O_NONBLOCK);
1826 n = recvmsg(b->num, &msg, MSG_PEEK);
1830 fcntl(b->num, F_SETFL, sockflags);
1835 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1842 /* read anything else */
1846 int BIO_dgram_sctp_msg_waiting(BIO *b)
1849 union sctp_notification snp;
1852 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1854 /* Check if there are any messages waiting to be read */
1857 memset(&snp, 0x00, sizeof(union sctp_notification));
1858 iov.iov_base = (char *)&snp;
1859 iov.iov_len = sizeof(union sctp_notification);
1860 msg.msg_name = NULL;
1861 msg.msg_namelen = 0;
1864 msg.msg_control = NULL;
1865 msg.msg_controllen = 0;
1868 sockflags = fcntl(b->num, F_GETFL, 0);
1869 fcntl(b->num, F_SETFL, O_NONBLOCK);
1870 n = recvmsg(b->num, &msg, MSG_PEEK);
1871 fcntl(b->num, F_SETFL, sockflags);
1873 /* if notification, process and try again */
1874 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION))
1876 #ifdef SCTP_AUTHENTICATION_EVENT
1877 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1878 dgram_sctp_handle_auth_free_key_event(b, &snp);
1881 memset(&snp, 0x00, sizeof(union sctp_notification));
1882 iov.iov_base = (char *)&snp;
1883 iov.iov_len = sizeof(union sctp_notification);
1884 msg.msg_name = NULL;
1885 msg.msg_namelen = 0;
1888 msg.msg_control = NULL;
1889 msg.msg_controllen = 0;
1891 n = recvmsg(b->num, &msg, 0);
1893 if (data->handle_notifications != NULL)
1894 data->handle_notifications(b, data->notification_context, (void*) &snp);
1897 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1899 /* Return 1 if there is a message to be read, return 0 otherwise. */
1906 static int dgram_sctp_puts(BIO *bp, const char *str)
1911 ret=dgram_sctp_write(bp,str,n);
1916 static int BIO_dgram_should_retry(int i)
1920 if ((i == 0) || (i == -1))
1922 err=get_last_socket_error();
1924 #if defined(OPENSSL_SYS_WINDOWS)
1925 /* If the socket return value (i) is -1
1926 * and err is unexpectedly 0 at this point,
1927 * the error code was overwritten by
1928 * another system call before this error
1929 * handling is called.
1933 return(BIO_dgram_non_fatal_error(err));
1938 int BIO_dgram_non_fatal_error(int err)
1942 #if defined(OPENSSL_SYS_WINDOWS)
1943 # if defined(WSAEWOULDBLOCK)
1944 case WSAEWOULDBLOCK:
1947 # if 0 /* This appears to always be an error */
1948 # if defined(WSAENOTCONN)
1955 # ifdef WSAEWOULDBLOCK
1956 # if WSAEWOULDBLOCK != EWOULDBLOCK
1969 #if EWOULDBLOCK != EAGAIN
1994 static void get_current_time(struct timeval *t)
1998 union { unsigned __int64 ul; FILETIME ft; } now;
2001 SystemTimeToFileTime(&st,&now.ft);
2003 now.ul -= 116444736000000000ULL;
2005 now.ul -= 116444736000000000UI64; /* re-bias to 1/1/1970 */
2007 t->tv_sec = (long)(now.ul/10000000);
2008 t->tv_usec = ((int)(now.ul%10000000))/10;
2009 #elif defined(OPENSSL_SYS_VMS)
2012 t->tv_sec = (long)tb.time;
2013 t->tv_usec = (long)tb.millitm * 1000;
2015 gettimeofday(t, NULL);