1 /* crypto/bio/bio_dgram.c */
3 * DTLS implementation written by Nagendra Modadugu
4 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
6 /* ====================================================================
7 * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * openssl-core@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
66 #include <openssl/bio.h>
67 #ifndef OPENSSL_NO_DGRAM
69 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS)
70 #include <sys/timeb.h>
73 #ifndef OPENSSL_NO_SCTP
74 #include <netinet/sctp.h>
76 #define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
77 #define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
80 #if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
81 #define IP_MTU 14 /* linux is lame */
84 #if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
85 /* Standard definition causes type-punning problems. */
86 #undef IN6_IS_ADDR_V4MAPPED
87 #define s6_addr32 __u6_addr.__u6_addr32
88 #define IN6_IS_ADDR_V4MAPPED(a) \
89 (((a)->s6_addr32[0] == 0) && \
90 ((a)->s6_addr32[1] == 0) && \
91 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
95 #define sock_write SockWrite /* Watt-32 uses same names */
96 #define sock_read SockRead
97 #define sock_puts SockPuts
100 static int dgram_write(BIO *h, const char *buf, int num);
101 static int dgram_read(BIO *h, char *buf, int size);
102 static int dgram_puts(BIO *h, const char *str);
103 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
104 static int dgram_new(BIO *h);
105 static int dgram_free(BIO *data);
106 static int dgram_clear(BIO *bio);
108 #ifndef OPENSSL_NO_SCTP
109 static int dgram_sctp_write(BIO *h, const char *buf, int num);
110 static int dgram_sctp_read(BIO *h, char *buf, int size);
111 static int dgram_sctp_puts(BIO *h, const char *str);
112 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2);
113 static int dgram_sctp_new(BIO *h);
114 static int dgram_sctp_free(BIO *data);
115 #ifdef SCTP_AUTHENTICATION_EVENT
116 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp);
120 static int BIO_dgram_should_retry(int s);
122 static void get_current_time(struct timeval *t);
124 static BIO_METHOD methods_dgramp=
131 NULL, /* dgram_gets, */
138 #ifndef OPENSSL_NO_SCTP
139 static BIO_METHOD methods_dgramp_sctp=
142 "datagram sctp socket",
146 NULL, /* dgram_gets, */
154 typedef struct bio_dgram_data_st
158 struct sockaddr_in sa_in;
160 struct sockaddr_in6 sa_in6;
163 unsigned int connected;
166 struct timeval next_timeout;
167 struct timeval socket_timeout;
170 #ifndef OPENSSL_NO_SCTP
171 typedef struct bio_dgram_sctp_save_message_st
176 } bio_dgram_sctp_save_message;
178 typedef struct bio_dgram_sctp_data_st
182 struct sockaddr_in sa_in;
184 struct sockaddr_in6 sa_in6;
187 unsigned int connected;
190 struct bio_dgram_sctp_sndinfo sndinfo;
191 struct bio_dgram_sctp_rcvinfo rcvinfo;
192 struct bio_dgram_sctp_prinfo prinfo;
193 void (*handle_notifications)(BIO *bio, void *context, void *buf);
194 void* notification_context;
199 int peer_auth_tested;
200 bio_dgram_sctp_save_message saved_message;
201 } bio_dgram_sctp_data;
204 BIO_METHOD *BIO_s_datagram(void)
206 return(&methods_dgramp);
209 BIO *BIO_new_dgram(int fd, int close_flag)
213 ret=BIO_new(BIO_s_datagram());
214 if (ret == NULL) return(NULL);
215 BIO_set_fd(ret,fd,close_flag);
219 static int dgram_new(BIO *bi)
221 bio_dgram_data *data = NULL;
225 data = OPENSSL_malloc(sizeof(bio_dgram_data));
228 memset(data, 0x00, sizeof(bio_dgram_data));
235 static int dgram_free(BIO *a)
237 bio_dgram_data *data;
239 if (a == NULL) return(0);
240 if ( ! dgram_clear(a))
243 data = (bio_dgram_data *)a->ptr;
244 if(data != NULL) OPENSSL_free(data);
249 static int dgram_clear(BIO *a)
251 if (a == NULL) return(0);
264 static void dgram_adjust_rcv_timeout(BIO *b)
266 #if defined(SO_RCVTIMEO)
267 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
268 union { size_t s; int i; } sz = {0};
270 /* Is a timer active? */
271 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0)
273 struct timeval timenow, timeleft;
275 /* Read current socket timeout */
276 #ifdef OPENSSL_SYS_WINDOWS
279 sz.i = sizeof(timeout);
280 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
281 (void*)&timeout, &sz.i) < 0)
282 { perror("getsockopt"); }
285 data->socket_timeout.tv_sec = timeout / 1000;
286 data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
289 sz.i = sizeof(data->socket_timeout);
290 if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
291 &(data->socket_timeout), (void *)&sz) < 0)
292 { perror("getsockopt"); }
293 else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0)
294 OPENSSL_assert(sz.s<=sizeof(data->socket_timeout));
297 /* Get current time */
298 get_current_time(&timenow);
300 /* Calculate time left until timer expires */
301 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
302 timeleft.tv_sec -= timenow.tv_sec;
303 timeleft.tv_usec -= timenow.tv_usec;
304 if (timeleft.tv_usec < 0)
307 timeleft.tv_usec += 1000000;
310 if (timeleft.tv_sec < 0)
313 timeleft.tv_usec = 1;
316 /* Adjust socket timeout if next handhake message timer
317 * will expire earlier.
319 if ((data->socket_timeout.tv_sec == 0 && data->socket_timeout.tv_usec == 0) ||
320 (data->socket_timeout.tv_sec > timeleft.tv_sec) ||
321 (data->socket_timeout.tv_sec == timeleft.tv_sec &&
322 data->socket_timeout.tv_usec >= timeleft.tv_usec))
324 #ifdef OPENSSL_SYS_WINDOWS
325 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
326 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
327 (void*)&timeout, sizeof(timeout)) < 0)
328 { perror("setsockopt"); }
330 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
331 sizeof(struct timeval)) < 0)
332 { perror("setsockopt"); }
339 static void dgram_reset_rcv_timeout(BIO *b)
341 #if defined(SO_RCVTIMEO)
342 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
344 /* Is a timer active? */
345 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0)
347 #ifdef OPENSSL_SYS_WINDOWS
348 int timeout = data->socket_timeout.tv_sec * 1000 +
349 data->socket_timeout.tv_usec / 1000;
350 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
351 (void*)&timeout, sizeof(timeout)) < 0)
352 { perror("setsockopt"); }
354 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
355 sizeof(struct timeval)) < 0)
356 { perror("setsockopt"); }
362 static int dgram_read(BIO *b, char *out, int outl)
365 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
369 * See commentary in b_sock.c. <appro>
371 union { size_t s; int i; } len;
374 struct sockaddr_in sa_in;
376 struct sockaddr_in6 sa_in6;
382 sa.len.i=sizeof(sa.peer);
386 clear_socket_error();
387 memset(&sa.peer, 0x00, sizeof(sa.peer));
388 dgram_adjust_rcv_timeout(b);
389 ret=recvfrom(b->num,out,outl,0,&sa.peer.sa,(void *)&sa.len);
390 if (sizeof(sa.len.i)!=sizeof(sa.len.s) && sa.len.i==0)
392 OPENSSL_assert(sa.len.s<=sizeof(sa.peer));
393 sa.len.i = (int)sa.len.s;
396 if ( ! data->connected && ret >= 0)
397 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
399 BIO_clear_retry_flags(b);
402 if (BIO_dgram_should_retry(ret))
404 BIO_set_retry_read(b);
405 data->_errno = get_last_socket_error();
409 dgram_reset_rcv_timeout(b);
414 static int dgram_write(BIO *b, const char *in, int inl)
417 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
418 clear_socket_error();
420 if ( data->connected )
421 ret=writesocket(b->num,in,inl);
424 int peerlen = sizeof(data->peer);
426 if (data->peer.sa.sa_family == AF_INET)
427 peerlen = sizeof(data->peer.sa_in);
429 else if (data->peer.sa.sa_family == AF_INET6)
430 peerlen = sizeof(data->peer.sa_in6);
432 #if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
433 ret=sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
435 ret=sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
439 BIO_clear_retry_flags(b);
442 if (BIO_dgram_should_retry(ret))
444 BIO_set_retry_write(b);
445 data->_errno = get_last_socket_error();
447 #if 0 /* higher layers are responsible for querying MTU, if necessary */
448 if ( data->_errno == EMSGSIZE)
449 /* retrieve the new MTU */
450 BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
457 static long dgram_get_mtu_overhead(bio_dgram_data *data)
461 switch (data->peer.sa.sa_family)
464 /* Assume this is UDP - 20 bytes for IP, 8 bytes for UDP */
469 #ifdef IN6_IS_ADDR_V4MAPPED
470 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
471 /* Assume this is UDP - 20 bytes for IP, 8 bytes for UDP */
475 /* Assume this is UDP - 40 bytes for IP, 8 bytes for UDP */
480 /* We don't know. Go with the historical default */
487 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
491 struct sockaddr *to = NULL;
492 bio_dgram_data *data = NULL;
493 #if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
495 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
496 * modern enough to define socklen_t */
500 struct sockaddr_in s4;
502 struct sockaddr_in6 s6;
507 data = (bio_dgram_data *)b->ptr;
513 case BIO_C_FILE_SEEK:
516 case BIO_C_FILE_TELL:
522 b->num= *((int *)ptr);
523 b->shutdown=(int)num;
530 if (ip != NULL) *ip=b->num;
536 case BIO_CTRL_GET_CLOSE:
539 case BIO_CTRL_SET_CLOSE:
540 b->shutdown=(int)num;
542 case BIO_CTRL_PENDING:
543 case BIO_CTRL_WPENDING:
550 case BIO_CTRL_DGRAM_CONNECT:
551 to = (struct sockaddr *)ptr;
553 if (connect(b->num, to, sizeof(struct sockaddr)) < 0)
554 { perror("connect"); ret = 0; }
558 switch (to->sa_family)
561 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
565 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
569 memcpy(&data->peer,to,sizeof(data->peer.sa));
576 /* (Linux)kernel sets DF bit on outgoing IP packets */
577 case BIO_CTRL_DGRAM_MTU_DISCOVER:
578 #if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
579 addr_len = (socklen_t)sizeof(addr);
580 memset((void *)&addr, 0, sizeof(addr));
581 if (getsockname(b->num, &addr.sa, &addr_len) < 0)
586 switch (addr.sa.sa_family)
589 sockopt_val = IP_PMTUDISC_DO;
590 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
591 &sockopt_val, sizeof(sockopt_val))) < 0)
592 perror("setsockopt");
594 #if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
596 sockopt_val = IPV6_PMTUDISC_DO;
597 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
598 &sockopt_val, sizeof(sockopt_val))) < 0)
599 perror("setsockopt");
610 case BIO_CTRL_DGRAM_QUERY_MTU:
611 #if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
612 addr_len = (socklen_t)sizeof(addr);
613 memset((void *)&addr, 0, sizeof(addr));
614 if (getsockname(b->num, &addr.sa, &addr_len) < 0)
619 sockopt_len = sizeof(sockopt_val);
620 switch (addr.sa.sa_family)
623 if ((ret = getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
624 &sockopt_len)) < 0 || sockopt_val < 0)
630 /* we assume that the transport protocol is UDP and no
631 * IP options are used.
633 data->mtu = sockopt_val - 8 - 20;
637 #if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
639 if ((ret = getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU, (void *)&sockopt_val,
640 &sockopt_len)) < 0 || sockopt_val < 0)
646 /* we assume that the transport protocol is UDP and no
647 * IPV6 options are used.
649 data->mtu = sockopt_val - 8 - 40;
662 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
663 ret = -dgram_get_mtu_overhead(data);
664 switch (data->peer.sa.sa_family)
671 #ifdef IN6_IS_ADDR_V4MAPPED
672 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr))
684 case BIO_CTRL_DGRAM_GET_MTU:
687 case BIO_CTRL_DGRAM_SET_MTU:
691 case BIO_CTRL_DGRAM_SET_CONNECTED:
692 to = (struct sockaddr *)ptr;
697 switch (to->sa_family)
700 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
704 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
708 memcpy(&data->peer,to,sizeof(data->peer.sa));
715 memset(&(data->peer), 0x00, sizeof(data->peer));
718 case BIO_CTRL_DGRAM_GET_PEER:
719 switch (data->peer.sa.sa_family)
722 ret=sizeof(data->peer.sa_in);
726 ret=sizeof(data->peer.sa_in6);
730 ret=sizeof(data->peer.sa);
733 if (num==0 || num>ret)
735 memcpy(ptr,&data->peer,(ret=num));
737 case BIO_CTRL_DGRAM_SET_PEER:
738 to = (struct sockaddr *) ptr;
739 switch (to->sa_family)
742 memcpy(&data->peer,to,sizeof(data->peer.sa_in));
746 memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
750 memcpy(&data->peer,to,sizeof(data->peer.sa));
754 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
755 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
757 #if defined(SO_RCVTIMEO)
758 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
759 #ifdef OPENSSL_SYS_WINDOWS
761 struct timeval *tv = (struct timeval *)ptr;
762 int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
763 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
764 (void*)&timeout, sizeof(timeout)) < 0)
765 { perror("setsockopt"); ret = -1; }
768 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
769 sizeof(struct timeval)) < 0)
770 { perror("setsockopt"); ret = -1; }
773 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
775 union { size_t s; int i; } sz = {0};
776 #ifdef OPENSSL_SYS_WINDOWS
778 struct timeval *tv = (struct timeval *)ptr;
780 sz.i = sizeof(timeout);
781 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
782 (void*)&timeout, &sz.i) < 0)
783 { perror("getsockopt"); ret = -1; }
786 tv->tv_sec = timeout / 1000;
787 tv->tv_usec = (timeout % 1000) * 1000;
791 sz.i = sizeof(struct timeval);
792 if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
793 ptr, (void *)&sz) < 0)
794 { perror("getsockopt"); ret = -1; }
795 else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0)
797 OPENSSL_assert(sz.s<=sizeof(struct timeval));
806 #if defined(SO_SNDTIMEO)
807 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
808 #ifdef OPENSSL_SYS_WINDOWS
810 struct timeval *tv = (struct timeval *)ptr;
811 int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
812 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
813 (void*)&timeout, sizeof(timeout)) < 0)
814 { perror("setsockopt"); ret = -1; }
817 if ( setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
818 sizeof(struct timeval)) < 0)
819 { perror("setsockopt"); ret = -1; }
822 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
824 union { size_t s; int i; } sz = {0};
825 #ifdef OPENSSL_SYS_WINDOWS
827 struct timeval *tv = (struct timeval *)ptr;
829 sz.i = sizeof(timeout);
830 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
831 (void*)&timeout, &sz.i) < 0)
832 { perror("getsockopt"); ret = -1; }
835 tv->tv_sec = timeout / 1000;
836 tv->tv_usec = (timeout % 1000) * 1000;
840 sz.i = sizeof(struct timeval);
841 if ( getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
842 ptr, (void *)&sz) < 0)
843 { perror("getsockopt"); ret = -1; }
844 else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0)
846 OPENSSL_assert(sz.s<=sizeof(struct timeval));
855 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
857 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
858 #ifdef OPENSSL_SYS_WINDOWS
859 if ( data->_errno == WSAETIMEDOUT)
861 if ( data->_errno == EAGAIN)
871 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
872 if ( data->_errno == EMSGSIZE)
881 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
882 ret = dgram_get_mtu_overhead(data);
891 static int dgram_puts(BIO *bp, const char *str)
896 ret=dgram_write(bp,str,n);
900 #ifndef OPENSSL_NO_SCTP
901 BIO_METHOD *BIO_s_datagram_sctp(void)
903 return(&methods_dgramp_sctp);
906 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
909 int ret, optval = 20000;
910 int auth_data = 0, auth_forward = 0;
912 struct sctp_authchunk auth;
913 struct sctp_authchunks *authchunks;
914 socklen_t sockopt_len;
915 #ifdef SCTP_AUTHENTICATION_EVENT
917 struct sctp_event event;
919 struct sctp_event_subscribe event;
923 bio=BIO_new(BIO_s_datagram_sctp());
924 if (bio == NULL) return(NULL);
925 BIO_set_fd(bio,fd,close_flag);
927 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
928 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
929 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk));
930 OPENSSL_assert(ret >= 0);
931 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
932 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk));
933 OPENSSL_assert(ret >= 0);
935 /* Test if activation was successful. When using accept(),
936 * SCTP-AUTH has to be activated for the listening socket
937 * already, otherwise the connected socket won't use it. */
938 sockopt_len = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
939 authchunks = OPENSSL_malloc(sockopt_len);
940 memset(authchunks, 0, sizeof(sockopt_len));
941 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks, &sockopt_len);
942 OPENSSL_assert(ret >= 0);
944 for (p = (unsigned char*) authchunks->gauth_chunks;
945 p < (unsigned char*) authchunks + sockopt_len;
946 p += sizeof(uint8_t))
948 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1;
949 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1;
952 OPENSSL_free(authchunks);
954 OPENSSL_assert(auth_data);
955 OPENSSL_assert(auth_forward);
957 #ifdef SCTP_AUTHENTICATION_EVENT
959 memset(&event, 0, sizeof(struct sctp_event));
960 event.se_assoc_id = 0;
961 event.se_type = SCTP_AUTHENTICATION_EVENT;
963 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
964 OPENSSL_assert(ret >= 0);
966 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
967 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
968 OPENSSL_assert(ret >= 0);
970 event.sctp_authentication_event = 1;
972 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
973 OPENSSL_assert(ret >= 0);
977 /* Disable partial delivery by setting the min size
978 * larger than the max record size of 2^14 + 2048 + 13
980 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval, sizeof(optval));
981 OPENSSL_assert(ret >= 0);
986 int BIO_dgram_is_sctp(BIO *bio)
988 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
991 static int dgram_sctp_new(BIO *bi)
993 bio_dgram_sctp_data *data = NULL;
997 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data));
1000 memset(data, 0x00, sizeof(bio_dgram_sctp_data));
1001 #ifdef SCTP_PR_SCTP_NONE
1002 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1010 static int dgram_sctp_free(BIO *a)
1012 bio_dgram_sctp_data *data;
1014 if (a == NULL) return(0);
1015 if ( ! dgram_clear(a))
1018 data = (bio_dgram_sctp_data *)a->ptr;
1019 if(data != NULL) OPENSSL_free(data);
1024 #ifdef SCTP_AUTHENTICATION_EVENT
1025 void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp)
1028 struct sctp_authkey_event* authkeyevent = &snp->sn_auth_event;
1030 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY)
1032 struct sctp_authkeyid authkeyid;
1035 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1036 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1037 &authkeyid, sizeof(struct sctp_authkeyid));
1042 static int dgram_sctp_read(BIO *b, char *out, int outl)
1044 int ret = 0, n = 0, i, optval;
1046 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1047 union sctp_notification *snp;
1050 struct cmsghdr *cmsg;
1055 clear_socket_error();
1059 memset(&data->rcvinfo, 0x00, sizeof(struct bio_dgram_sctp_rcvinfo));
1062 msg.msg_name = NULL;
1063 msg.msg_namelen = 0;
1066 msg.msg_control = cmsgbuf;
1067 msg.msg_controllen = 512;
1069 n = recvmsg(b->num, &msg, 0);
1078 if (msg.msg_controllen > 0)
1080 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg))
1082 if (cmsg->cmsg_level != IPPROTO_SCTP)
1085 if (cmsg->cmsg_type == SCTP_RCVINFO)
1087 struct sctp_rcvinfo *rcvinfo;
1089 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1090 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1091 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1092 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1093 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1094 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1095 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1096 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1100 if (cmsg->cmsg_type == SCTP_SNDRCV)
1102 struct sctp_sndrcvinfo *sndrcvinfo;
1104 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1105 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1106 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1107 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1108 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1109 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1110 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1111 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1117 if (msg.msg_flags & MSG_NOTIFICATION)
1119 snp = (union sctp_notification*) out;
1120 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT)
1123 struct sctp_event event;
1125 struct sctp_event_subscribe event;
1126 socklen_t eventsize;
1128 /* If a message has been delayed until the socket
1129 * is dry, it can be sent now.
1131 if (data->saved_message.length > 0)
1133 dgram_sctp_write(data->saved_message.bio, data->saved_message.data,
1134 data->saved_message.length);
1135 OPENSSL_free(data->saved_message.data);
1136 data->saved_message.length = 0;
1139 /* disable sender dry event */
1141 memset(&event, 0, sizeof(struct sctp_event));
1142 event.se_assoc_id = 0;
1143 event.se_type = SCTP_SENDER_DRY_EVENT;
1145 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1146 OPENSSL_assert(i >= 0);
1148 eventsize = sizeof(struct sctp_event_subscribe);
1149 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1150 OPENSSL_assert(i >= 0);
1152 event.sctp_sender_dry_event = 0;
1154 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1155 OPENSSL_assert(i >= 0);
1159 #ifdef SCTP_AUTHENTICATION_EVENT
1160 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1161 dgram_sctp_handle_auth_free_key_event(b, snp);
1164 if (data->handle_notifications != NULL)
1165 data->handle_notifications(b, data->notification_context, (void*) out);
1167 memset(out, 0, outl);
1172 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR) && (ret < outl));
1174 if (ret > 0 && !(msg.msg_flags & MSG_EOR))
1176 /* Partial message read, this should never happen! */
1178 /* The buffer was too small, this means the peer sent
1179 * a message that was larger than allowed. */
1183 /* Test if socket buffer can handle max record
1184 * size (2^14 + 2048 + 13)
1186 optlen = (socklen_t) sizeof(int);
1187 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
1188 OPENSSL_assert(ret >= 0);
1189 OPENSSL_assert(optval >= 18445);
1191 /* Test if SCTP doesn't partially deliver below
1192 * max record size (2^14 + 2048 + 13)
1194 optlen = (socklen_t) sizeof(int);
1195 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
1197 OPENSSL_assert(ret >= 0);
1198 OPENSSL_assert(optval >= 18445);
1200 /* Partially delivered notification??? Probably a bug.... */
1201 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
1203 /* Everything seems ok till now, so it's most likely
1204 * a message dropped by PR-SCTP.
1206 memset(out, 0, outl);
1207 BIO_set_retry_read(b);
1211 BIO_clear_retry_flags(b);
1214 if (BIO_dgram_should_retry(ret))
1216 BIO_set_retry_read(b);
1217 data->_errno = get_last_socket_error();
1221 /* Test if peer uses SCTP-AUTH before continuing */
1222 if (!data->peer_auth_tested)
1224 int ii, auth_data = 0, auth_forward = 0;
1226 struct sctp_authchunks *authchunks;
1228 optlen = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1229 authchunks = OPENSSL_malloc(optlen);
1230 memset(authchunks, 0, sizeof(optlen));
1231 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS, authchunks, &optlen);
1232 OPENSSL_assert(ii >= 0);
1234 for (p = (unsigned char*) authchunks->gauth_chunks;
1235 p < (unsigned char*) authchunks + optlen;
1236 p += sizeof(uint8_t))
1238 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1;
1239 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1;
1242 OPENSSL_free(authchunks);
1244 if (!auth_data || !auth_forward)
1246 BIOerr(BIO_F_DGRAM_SCTP_READ,BIO_R_CONNECT_ERROR);
1250 data->peer_auth_tested = 1;
1256 static int dgram_sctp_write(BIO *b, const char *in, int inl)
1259 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1260 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
1261 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
1262 struct bio_dgram_sctp_sndinfo handshake_sinfo;
1263 struct iovec iov[1];
1265 struct cmsghdr *cmsg;
1266 #if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1267 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) + CMSG_SPACE(sizeof(struct sctp_prinfo))];
1268 struct sctp_sndinfo *sndinfo;
1269 struct sctp_prinfo *prinfo;
1271 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
1272 struct sctp_sndrcvinfo *sndrcvinfo;
1275 clear_socket_error();
1277 /* If we're send anything else than application data,
1278 * disable all user parameters and flags.
1281 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo));
1282 #ifdef SCTP_SACK_IMMEDIATELY
1283 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
1285 sinfo = &handshake_sinfo;
1288 /* If we have to send a shutdown alert message and the
1289 * socket is not dry yet, we have to save it and send it
1290 * as soon as the socket gets dry.
1292 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b))
1294 data->saved_message.bio = b;
1295 data->saved_message.length = inl;
1296 data->saved_message.data = OPENSSL_malloc(inl);
1297 memcpy(data->saved_message.data, in, inl);
1301 iov[0].iov_base = (char *)in;
1302 iov[0].iov_len = inl;
1303 msg.msg_name = NULL;
1304 msg.msg_namelen = 0;
1307 msg.msg_control = (caddr_t)cmsgbuf;
1308 msg.msg_controllen = 0;
1310 #if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
1311 cmsg = (struct cmsghdr *)cmsgbuf;
1312 cmsg->cmsg_level = IPPROTO_SCTP;
1313 cmsg->cmsg_type = SCTP_SNDINFO;
1314 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
1315 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
1316 memset(sndinfo, 0, sizeof(struct sctp_sndinfo));
1317 sndinfo->snd_sid = sinfo->snd_sid;
1318 sndinfo->snd_flags = sinfo->snd_flags;
1319 sndinfo->snd_ppid = sinfo->snd_ppid;
1320 sndinfo->snd_context = sinfo->snd_context;
1321 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
1323 cmsg = (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
1324 cmsg->cmsg_level = IPPROTO_SCTP;
1325 cmsg->cmsg_type = SCTP_PRINFO;
1326 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
1327 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
1328 memset(prinfo, 0, sizeof(struct sctp_prinfo));
1329 prinfo->pr_policy = pinfo->pr_policy;
1330 prinfo->pr_value = pinfo->pr_value;
1331 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
1333 cmsg = (struct cmsghdr *)cmsgbuf;
1334 cmsg->cmsg_level = IPPROTO_SCTP;
1335 cmsg->cmsg_type = SCTP_SNDRCV;
1336 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
1337 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1338 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
1339 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
1340 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
1342 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
1344 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
1345 sndrcvinfo->sinfo_context = sinfo->snd_context;
1346 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
1347 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
1350 ret = sendmsg(b->num, &msg, 0);
1352 BIO_clear_retry_flags(b);
1355 if (BIO_dgram_should_retry(ret))
1357 BIO_set_retry_write(b);
1358 data->_errno = get_last_socket_error();
1364 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
1367 bio_dgram_sctp_data *data = NULL;
1368 socklen_t sockopt_len = 0;
1369 struct sctp_authkeyid authkeyid;
1370 struct sctp_authkey *authkey = NULL;
1372 data = (bio_dgram_sctp_data *)b->ptr;
1376 case BIO_CTRL_DGRAM_QUERY_MTU:
1377 /* Set to maximum (2^14)
1378 * and ignore user input to enable transport
1379 * protocol fragmentation.
1380 * Returns always 2^14.
1385 case BIO_CTRL_DGRAM_SET_MTU:
1386 /* Set to maximum (2^14)
1387 * and ignore input to enable transport
1388 * protocol fragmentation.
1389 * Returns always 2^14.
1394 case BIO_CTRL_DGRAM_SET_CONNECTED:
1395 case BIO_CTRL_DGRAM_CONNECT:
1396 /* Returns always -1. */
1399 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
1400 /* SCTP doesn't need the DTLS timer
1404 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
1405 /* We allow transport protocol fragmentation so this is irrelevant */
1408 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
1410 data->in_handshake = 1;
1412 data->in_handshake = 0;
1414 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY, &data->in_handshake, sizeof(int));
1416 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
1417 /* New shared key for SCTP AUTH.
1418 * Returns 0 on success, -1 otherwise.
1421 /* Get active key */
1422 sockopt_len = sizeof(struct sctp_authkeyid);
1423 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1427 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
1428 authkey = OPENSSL_malloc(sockopt_len);
1429 if (authkey == NULL)
1434 memset(authkey, 0x00, sockopt_len);
1435 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
1437 /* This field is missing in FreeBSD 8.2 and earlier,
1438 * and FreeBSD 8.3 and higher work without it.
1440 authkey->sca_keylength = 64;
1442 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
1444 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey, sockopt_len);
1445 OPENSSL_free(authkey);
1449 /* Reset active key */
1450 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1451 &authkeyid, sizeof(struct sctp_authkeyid));
1455 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
1456 /* Returns 0 on success, -1 otherwise. */
1458 /* Get active key */
1459 sockopt_len = sizeof(struct sctp_authkeyid);
1460 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1463 /* Set active key */
1464 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
1465 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
1466 &authkeyid, sizeof(struct sctp_authkeyid));
1469 /* CCS has been sent, so remember that and fall through
1470 * to check if we need to deactivate an old key
1474 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
1475 /* Returns 0 on success, -1 otherwise. */
1477 /* Has this command really been called or is this just a fall-through? */
1478 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
1481 /* CSS has been both, received and sent, so deactivate an old key */
1482 if (data->ccs_rcvd == 1 && data->ccs_sent == 1)
1484 /* Get active key */
1485 sockopt_len = sizeof(struct sctp_authkeyid);
1486 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len);
1489 /* Deactivate key or delete second last key if
1490 * SCTP_AUTHENTICATION_EVENT is not available.
1492 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1493 #ifdef SCTP_AUTH_DEACTIVATE_KEY
1494 sockopt_len = sizeof(struct sctp_authkeyid);
1495 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
1496 &authkeyid, sockopt_len);
1499 #ifndef SCTP_AUTHENTICATION_EVENT
1500 if (authkeyid.scact_keynumber > 0)
1502 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
1503 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1504 &authkeyid, sizeof(struct sctp_authkeyid));
1513 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
1514 /* Returns the size of the copied struct. */
1515 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo))
1516 num = sizeof(struct bio_dgram_sctp_sndinfo);
1518 memcpy(ptr, &(data->sndinfo), num);
1521 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
1522 /* Returns the size of the copied struct. */
1523 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo))
1524 num = sizeof(struct bio_dgram_sctp_sndinfo);
1526 memcpy(&(data->sndinfo), ptr, num);
1528 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
1529 /* Returns the size of the copied struct. */
1530 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo))
1531 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1533 memcpy(ptr, &data->rcvinfo, num);
1537 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
1538 /* Returns the size of the copied struct. */
1539 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo))
1540 num = sizeof(struct bio_dgram_sctp_rcvinfo);
1542 memcpy(&(data->rcvinfo), ptr, num);
1544 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
1545 /* Returns the size of the copied struct. */
1546 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo))
1547 num = sizeof(struct bio_dgram_sctp_prinfo);
1549 memcpy(ptr, &(data->prinfo), num);
1552 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
1553 /* Returns the size of the copied struct. */
1554 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo))
1555 num = sizeof(struct bio_dgram_sctp_prinfo);
1557 memcpy(&(data->prinfo), ptr, num);
1559 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
1560 /* Returns always 1. */
1562 data->save_shutdown = 1;
1564 data->save_shutdown = 0;
1568 /* Pass to default ctrl function to
1569 * process SCTP unspecific commands
1571 ret=dgram_ctrl(b, cmd, num, ptr);
1577 int BIO_dgram_sctp_notification_cb(BIO *b,
1578 void (*handle_notifications)(BIO *bio, void *context, void *buf),
1581 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1583 if (handle_notifications != NULL)
1585 data->handle_notifications = handle_notifications;
1586 data->notification_context = context;
1594 int BIO_dgram_sctp_wait_for_dry(BIO *b)
1597 int n, sockflags, ret;
1598 union sctp_notification snp;
1602 struct sctp_event event;
1604 struct sctp_event_subscribe event;
1605 socklen_t eventsize;
1607 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1609 /* set sender dry event */
1611 memset(&event, 0, sizeof(struct sctp_event));
1612 event.se_assoc_id = 0;
1613 event.se_type = SCTP_SENDER_DRY_EVENT;
1615 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1617 eventsize = sizeof(struct sctp_event_subscribe);
1618 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1622 event.sctp_sender_dry_event = 1;
1624 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1629 /* peek for notification */
1630 memset(&snp, 0x00, sizeof(union sctp_notification));
1631 iov.iov_base = (char *)&snp;
1632 iov.iov_len = sizeof(union sctp_notification);
1633 msg.msg_name = NULL;
1634 msg.msg_namelen = 0;
1637 msg.msg_control = NULL;
1638 msg.msg_controllen = 0;
1641 n = recvmsg(b->num, &msg, MSG_PEEK);
1644 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1650 /* if we find a notification, process it and try again if necessary */
1651 while (msg.msg_flags & MSG_NOTIFICATION)
1653 memset(&snp, 0x00, sizeof(union sctp_notification));
1654 iov.iov_base = (char *)&snp;
1655 iov.iov_len = sizeof(union sctp_notification);
1656 msg.msg_name = NULL;
1657 msg.msg_namelen = 0;
1660 msg.msg_control = NULL;
1661 msg.msg_controllen = 0;
1664 n = recvmsg(b->num, &msg, 0);
1667 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1673 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT)
1677 /* disable sender dry event */
1679 memset(&event, 0, sizeof(struct sctp_event));
1680 event.se_assoc_id = 0;
1681 event.se_type = SCTP_SENDER_DRY_EVENT;
1683 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event));
1685 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
1686 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
1690 event.sctp_sender_dry_event = 0;
1692 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe));
1698 #ifdef SCTP_AUTHENTICATION_EVENT
1699 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1700 dgram_sctp_handle_auth_free_key_event(b, &snp);
1703 if (data->handle_notifications != NULL)
1704 data->handle_notifications(b, data->notification_context, (void*) &snp);
1706 /* found notification, peek again */
1707 memset(&snp, 0x00, sizeof(union sctp_notification));
1708 iov.iov_base = (char *)&snp;
1709 iov.iov_len = sizeof(union sctp_notification);
1710 msg.msg_name = NULL;
1711 msg.msg_namelen = 0;
1714 msg.msg_control = NULL;
1715 msg.msg_controllen = 0;
1718 /* if we have seen the dry already, don't wait */
1721 sockflags = fcntl(b->num, F_GETFL, 0);
1722 fcntl(b->num, F_SETFL, O_NONBLOCK);
1725 n = recvmsg(b->num, &msg, MSG_PEEK);
1729 fcntl(b->num, F_SETFL, sockflags);
1734 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK))
1741 /* read anything else */
1745 int BIO_dgram_sctp_msg_waiting(BIO *b)
1748 union sctp_notification snp;
1751 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr;
1753 /* Check if there are any messages waiting to be read */
1756 memset(&snp, 0x00, sizeof(union sctp_notification));
1757 iov.iov_base = (char *)&snp;
1758 iov.iov_len = sizeof(union sctp_notification);
1759 msg.msg_name = NULL;
1760 msg.msg_namelen = 0;
1763 msg.msg_control = NULL;
1764 msg.msg_controllen = 0;
1767 sockflags = fcntl(b->num, F_GETFL, 0);
1768 fcntl(b->num, F_SETFL, O_NONBLOCK);
1769 n = recvmsg(b->num, &msg, MSG_PEEK);
1770 fcntl(b->num, F_SETFL, sockflags);
1772 /* if notification, process and try again */
1773 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION))
1775 #ifdef SCTP_AUTHENTICATION_EVENT
1776 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
1777 dgram_sctp_handle_auth_free_key_event(b, &snp);
1780 memset(&snp, 0x00, sizeof(union sctp_notification));
1781 iov.iov_base = (char *)&snp;
1782 iov.iov_len = sizeof(union sctp_notification);
1783 msg.msg_name = NULL;
1784 msg.msg_namelen = 0;
1787 msg.msg_control = NULL;
1788 msg.msg_controllen = 0;
1790 n = recvmsg(b->num, &msg, 0);
1792 if (data->handle_notifications != NULL)
1793 data->handle_notifications(b, data->notification_context, (void*) &snp);
1796 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
1798 /* Return 1 if there is a message to be read, return 0 otherwise. */
1805 static int dgram_sctp_puts(BIO *bp, const char *str)
1810 ret=dgram_sctp_write(bp,str,n);
1815 static int BIO_dgram_should_retry(int i)
1819 if ((i == 0) || (i == -1))
1821 err=get_last_socket_error();
1823 #if defined(OPENSSL_SYS_WINDOWS)
1824 /* If the socket return value (i) is -1
1825 * and err is unexpectedly 0 at this point,
1826 * the error code was overwritten by
1827 * another system call before this error
1828 * handling is called.
1832 return(BIO_dgram_non_fatal_error(err));
1837 int BIO_dgram_non_fatal_error(int err)
1841 #if defined(OPENSSL_SYS_WINDOWS)
1842 # if defined(WSAEWOULDBLOCK)
1843 case WSAEWOULDBLOCK:
1846 # if 0 /* This appears to always be an error */
1847 # if defined(WSAENOTCONN)
1854 # ifdef WSAEWOULDBLOCK
1855 # if WSAEWOULDBLOCK != EWOULDBLOCK
1868 #if EWOULDBLOCK != EAGAIN
1893 static void get_current_time(struct timeval *t)
1895 #ifdef OPENSSL_SYS_WIN32
1898 t->tv_sec = (long)tb.time;
1899 t->tv_usec = (long)tb.millitm * 1000;
1900 #elif defined(OPENSSL_SYS_VMS)
1903 t->tv_sec = (long)tb.time;
1904 t->tv_usec = (long)tb.millitm * 1000;
1906 gettimeofday(t, NULL);