Initial import

1 files changed, 836 insertions, 0 deletions

diff --git a/openssl/crypto/bio/bss_dgram.c b/openssl/crypto/bio/bss_dgram.c
new file mode 100644
index 00000000..71ebe987
--- /dev/null
+++ b/openssl/crypto/bio/bss_dgram.c
@@ -0,0 +1,836 @@
+/* crypto/bio/bio_dgram.c */
+/* 
+ * DTLS implementation written by Nagendra Modadugu
+ * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.  
+ */
+/* ====================================================================
+ * Copyright (c) 1999-2005 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    openssl-core@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+
+#include <stdio.h>
+#include <errno.h>
+#define USE_SOCKETS
+#include "cryptlib.h"
+
+#include <openssl/bio.h>
+#ifndef OPENSSL_NO_DGRAM
+
+#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS)
+#include <sys/timeb.h>
+#endif
+
+#ifdef OPENSSL_SYS_LINUX
+#define IP_MTU      14 /* linux is lame */
+#endif
+
+#ifdef WATT32
+#define sock_write SockWrite  /* Watt-32 uses same names */
+#define sock_read  SockRead
+#define sock_puts  SockPuts
+#endif
+
+static int dgram_write(BIO *h, const char *buf, int num);
+static int dgram_read(BIO *h, char *buf, int size);
+static int dgram_puts(BIO *h, const char *str);
+static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2);
+static int dgram_new(BIO *h);
+static int dgram_free(BIO *data);
+static int dgram_clear(BIO *bio);
+
+static int BIO_dgram_should_retry(int s);
+
+static void get_current_time(struct timeval *t);
+
+static BIO_METHOD methods_dgramp=
+	{
+	BIO_TYPE_DGRAM,
+	"datagram socket",
+	dgram_write,
+	dgram_read,
+	dgram_puts,
+	NULL, /* dgram_gets, */
+	dgram_ctrl,
+	dgram_new,
+	dgram_free,
+	NULL,
+	};
+
+typedef struct bio_dgram_data_st
+	{
+	union {
+		struct sockaddr sa;
+		struct sockaddr_in sa_in;
+#if OPENSSL_USE_IPV6
+		struct sockaddr_in6 sa_in6;
+#endif
+	} peer;
+	unsigned int connected;
+	unsigned int _errno;
+	unsigned int mtu;
+	struct timeval next_timeout;
+	struct timeval socket_timeout;
+	} bio_dgram_data;
+
+BIO_METHOD *BIO_s_datagram(void)
+	{
+	return(&methods_dgramp);
+	}
+
+BIO *BIO_new_dgram(int fd, int close_flag)
+	{
+	BIO *ret;
+
+	ret=BIO_new(BIO_s_datagram());
+	if (ret == NULL) return(NULL);
+	BIO_set_fd(ret,fd,close_flag);
+	return(ret);
+	}
+
+static int dgram_new(BIO *bi)
+	{
+	bio_dgram_data *data = NULL;
+
+	bi->init=0;
+	bi->num=0;
+	data = OPENSSL_malloc(sizeof(bio_dgram_data));
+	if (data == NULL)
+		return 0;
+	memset(data, 0x00, sizeof(bio_dgram_data));
+    bi->ptr = data;
+
+	bi->flags=0;
+	return(1);
+	}
+
+static int dgram_free(BIO *a)
+	{
+	bio_dgram_data *data;
+
+	if (a == NULL) return(0);
+	if ( ! dgram_clear(a))
+		return 0;
+
+	data = (bio_dgram_data *)a->ptr;
+	if(data != NULL) OPENSSL_free(data);
+
+	return(1);
+	}
+
+static int dgram_clear(BIO *a)
+	{
+	if (a == NULL) return(0);
+	if (a->shutdown)
+		{
+		if (a->init)
+			{
+			SHUTDOWN2(a->num);
+			}
+		a->init=0;
+		a->flags=0;
+		}
+	return(1);
+	}
+
+static void dgram_adjust_rcv_timeout(BIO *b)
+	{
+#if defined(SO_RCVTIMEO)
+	bio_dgram_data *data = (bio_dgram_data *)b->ptr;
+	int sz = sizeof(int);
+
+	/* Is a timer active? */
+	if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0)
+		{
+		struct timeval timenow, timeleft;
+
+		/* Read current socket timeout */
+#ifdef OPENSSL_SYS_WINDOWS
+		int timeout;
+		if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
+					   (void*)&timeout, &sz) < 0)
+			{ perror("getsockopt"); }
+		else
+			{
+			data->socket_timeout.tv_sec = timeout / 1000;
+			data->socket_timeout.tv_usec = (timeout % 1000) * 1000;
+			}
+#else
+		if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, 
+						&(data->socket_timeout), (void *)&sz) < 0)
+			{ perror("getsockopt"); }
+#endif
+
+		/* Get current time */
+		get_current_time(&timenow);
+
+		/* Calculate time left until timer expires */
+		memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval));
+		timeleft.tv_sec -= timenow.tv_sec;
+		timeleft.tv_usec -= timenow.tv_usec;
+		if (timeleft.tv_usec < 0)
+			{
+			timeleft.tv_sec--;
+			timeleft.tv_usec += 1000000;
+			}
+
+		if (timeleft.tv_sec < 0)
+			{
+			timeleft.tv_sec = 0;
+			timeleft.tv_usec = 1;
+			}
+
+		/* Adjust socket timeout if next handhake message timer
+		 * will expire earlier.
+		 */
+		if ((data->socket_timeout.tv_sec == 0 && data->socket_timeout.tv_usec == 0) ||
+			(data->socket_timeout.tv_sec > timeleft.tv_sec) ||
+			(data->socket_timeout.tv_sec == timeleft.tv_sec &&
+			 data->socket_timeout.tv_usec >= timeleft.tv_usec))
+			{
+#ifdef OPENSSL_SYS_WINDOWS
+			timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000;
+			if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
+						   (void*)&timeout, sizeof(timeout)) < 0)
+				{ perror("setsockopt"); }
+#else
+			if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft,
+							sizeof(struct timeval)) < 0)
+				{ perror("setsockopt"); }
+#endif
+			}
+		}
+#endif
+	}
+
+static void dgram_reset_rcv_timeout(BIO *b)
+	{
+#if defined(SO_RCVTIMEO)
+	bio_dgram_data *data = (bio_dgram_data *)b->ptr;
+
+	/* Is a timer active? */
+	if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0)
+		{
+#ifdef OPENSSL_SYS_WINDOWS
+		int timeout = data->socket_timeout.tv_sec * 1000 +
+					  data->socket_timeout.tv_usec / 1000;
+		if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
+					   (void*)&timeout, sizeof(timeout)) < 0)
+			{ perror("setsockopt"); }
+#else
+		if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout),
+						sizeof(struct timeval)) < 0)
+			{ perror("setsockopt"); }
+#endif
+		}
+#endif
+	}
+
+static int dgram_read(BIO *b, char *out, int outl)
+	{
+	int ret=0;
+	bio_dgram_data *data = (bio_dgram_data *)b->ptr;
+
+	struct	{
+	/*
+	 * See commentary in b_sock.c. <appro>
+	 */
+	union	{ size_t s; int i; } len;
+	union	{
+		struct sockaddr sa;
+		struct sockaddr_in sa_in;
+#if OPENSSL_USE_IPV6
+		struct sockaddr_in6 sa_in6;
+#endif
+		} peer;
+	} sa;
+
+	sa.len.s=0;
+	sa.len.i=sizeof(sa.peer);
+
+	if (out != NULL)
+		{
+		clear_socket_error();
+		memset(&sa.peer, 0x00, sizeof(sa.peer));
+		dgram_adjust_rcv_timeout(b);
+		ret=recvfrom(b->num,out,outl,0,&sa.peer.sa,(void *)&sa.len);
+		if (sizeof(sa.len.i)!=sizeof(sa.len.s) && sa.len.i==0)
+			{
+			OPENSSL_assert(sa.len.s<=sizeof(sa.peer));
+			sa.len.i = (int)sa.len.s;
+			}
+
+		if ( ! data->connected  && ret >= 0)
+			BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer);
+
+		BIO_clear_retry_flags(b);
+		if (ret < 0)
+			{
+			if (BIO_dgram_should_retry(ret))
+				{
+				BIO_set_retry_read(b);
+				data->_errno = get_last_socket_error();
+				}
+			}
+
+		dgram_reset_rcv_timeout(b);
+		}
+	return(ret);
+	}
+
+static int dgram_write(BIO *b, const char *in, int inl)
+	{
+	int ret;
+	bio_dgram_data *data = (bio_dgram_data *)b->ptr;
+	clear_socket_error();
+
+	if ( data->connected )
+		ret=writesocket(b->num,in,inl);
+	else
+		{
+		int peerlen = sizeof(data->peer);
+
+		if (data->peer.sa.sa_family == AF_INET)
+			peerlen = sizeof(data->peer.sa_in);
+#if OPENSSL_USE_IPV6
+		else if (data->peer.sa.sa_family == AF_INET6)
+			peerlen = sizeof(data->peer.sa_in6);
+#endif
+#if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
+		ret=sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen);
+#else
+		ret=sendto(b->num, in, inl, 0, &data->peer.sa, peerlen);
+#endif
+		}
+
+	BIO_clear_retry_flags(b);
+	if (ret <= 0)
+		{
+		if (BIO_dgram_should_retry(ret))
+			{
+			BIO_set_retry_write(b);  
+			data->_errno = get_last_socket_error();
+
+#if 0 /* higher layers are responsible for querying MTU, if necessary */
+			if ( data->_errno == EMSGSIZE)
+				/* retrieve the new MTU */
+				BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
+#endif
+			}
+		}
+	return(ret);
+	}
+
+static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
+	{
+	long ret=1;
+	int *ip;
+	struct sockaddr *to = NULL;
+	bio_dgram_data *data = NULL;
+#if defined(IP_MTU_DISCOVER) || defined(IP_MTU)
+	long sockopt_val = 0;
+	unsigned int sockopt_len = 0;
+#endif
+#ifdef OPENSSL_SYS_LINUX
+	socklen_t addr_len;
+	union	{
+		struct sockaddr	sa;
+		struct sockaddr_in s4;
+#if OPENSSL_USE_IPV6
+		struct sockaddr_in6 s6;
+#endif
+		} addr;
+#endif
+
+	data = (bio_dgram_data *)b->ptr;
+
+	switch (cmd)
+		{
+	case BIO_CTRL_RESET:
+		num=0;
+	case BIO_C_FILE_SEEK:
+		ret=0;
+		break;
+	case BIO_C_FILE_TELL:
+	case BIO_CTRL_INFO:
+		ret=0;
+		break;
+	case BIO_C_SET_FD:
+		dgram_clear(b);
+		b->num= *((int *)ptr);
+		b->shutdown=(int)num;
+		b->init=1;
+		break;
+	case BIO_C_GET_FD:
+		if (b->init)
+			{
+			ip=(int *)ptr;
+			if (ip != NULL) *ip=b->num;
+			ret=b->num;
+			}
+		else
+			ret= -1;
+		break;
+	case BIO_CTRL_GET_CLOSE:
+		ret=b->shutdown;
+		break;
+	case BIO_CTRL_SET_CLOSE:
+		b->shutdown=(int)num;
+		break;
+	case BIO_CTRL_PENDING:
+	case BIO_CTRL_WPENDING:
+		ret=0;
+		break;
+	case BIO_CTRL_DUP:
+	case BIO_CTRL_FLUSH:
+		ret=1;
+		break;
+	case BIO_CTRL_DGRAM_CONNECT:
+		to = (struct sockaddr *)ptr;
+#if 0
+		if (connect(b->num, to, sizeof(struct sockaddr)) < 0)
+			{ perror("connect"); ret = 0; }
+		else
+			{
+#endif
+			switch (to->sa_family)
+				{
+				case AF_INET:
+					memcpy(&data->peer,to,sizeof(data->peer.sa_in));
+					break;
+#if OPENSSL_USE_IPV6
+				case AF_INET6:
+					memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
+					break;
+#endif
+				default:
+					memcpy(&data->peer,to,sizeof(data->peer.sa));
+					break;
+				}
+#if 0
+			}
+#endif
+		break;
+		/* (Linux)kernel sets DF bit on outgoing IP packets */
+	case BIO_CTRL_DGRAM_MTU_DISCOVER:
+#ifdef OPENSSL_SYS_LINUX
+		addr_len = (socklen_t)sizeof(addr);
+		memset((void *)&addr, 0, sizeof(addr));
+		if (getsockname(b->num, &addr.sa, &addr_len) < 0)
+			{
+			ret = 0;
+			break;
+			}
+		sockopt_len = sizeof(sockopt_val);
+		switch (addr.sa.sa_family)
+			{
+		case AF_INET:
+			sockopt_val = IP_PMTUDISC_DO;
+			if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
+				&sockopt_val, sizeof(sockopt_val))) < 0)
+				perror("setsockopt");
+			break;
+#if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER)
+		case AF_INET6:
+			sockopt_val = IPV6_PMTUDISC_DO;
+			if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
+				&sockopt_val, sizeof(sockopt_val))) < 0)
+				perror("setsockopt");
+			break;
+#endif
+		default:
+			ret = -1;
+			break;
+			}
+		ret = -1;
+#else
+		break;
+#endif
+	case BIO_CTRL_DGRAM_QUERY_MTU:
+#ifdef OPENSSL_SYS_LINUX
+		addr_len = (socklen_t)sizeof(addr);
+		memset((void *)&addr, 0, sizeof(addr));
+		if (getsockname(b->num, &addr.sa, &addr_len) < 0)
+			{
+			ret = 0;
+			break;
+			}
+		sockopt_len = sizeof(sockopt_val);
+		switch (addr.sa.sa_family)
+			{
+		case AF_INET:
+			if ((ret = getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
+				&sockopt_len)) < 0 || sockopt_val < 0)
+				{
+				ret = 0;
+				}
+			else
+				{
+				/* we assume that the transport protocol is UDP and no
+				 * IP options are used.
+				 */
+				data->mtu = sockopt_val - 8 - 20;
+				ret = data->mtu;
+				}
+			break;
+#if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
+		case AF_INET6:
+			if ((ret = getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU, (void *)&sockopt_val,
+				&sockopt_len)) < 0 || sockopt_val < 0)
+				{
+				ret = 0;
+				}
+			else
+				{
+				/* we assume that the transport protocol is UDP and no
+				 * IPV6 options are used.
+				 */
+				data->mtu = sockopt_val - 8 - 40;
+				ret = data->mtu;
+				}
+			break;
+#endif
+		default:
+			ret = 0;
+			break;
+			}
+#else
+		ret = 0;
+#endif
+		break;
+	case BIO_CTRL_DGRAM_GET_MTU:
+		return data->mtu;
+		break;
+	case BIO_CTRL_DGRAM_SET_MTU:
+		data->mtu = num;
+		ret = num;
+		break;
+	case BIO_CTRL_DGRAM_SET_CONNECTED:
+		to = (struct sockaddr *)ptr;
+
+		if ( to != NULL)
+			{
+			data->connected = 1;
+			switch (to->sa_family)
+				{
+				case AF_INET:
+					memcpy(&data->peer,to,sizeof(data->peer.sa_in));
+					break;
+#if OPENSSL_USE_IPV6
+				case AF_INET6:
+					memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
+					break;
+#endif
+				default:
+					memcpy(&data->peer,to,sizeof(data->peer.sa));
+					break;
+				}
+			}
+		else
+			{
+			data->connected = 0;
+			memset(&(data->peer), 0x00, sizeof(data->peer));
+			}
+		break;
+	case BIO_CTRL_DGRAM_GET_PEER:
+		switch (data->peer.sa.sa_family)
+			{
+			case AF_INET:
+				ret=sizeof(data->peer.sa_in);
+				break;
+#if OPENSSL_USE_IPV6
+			case AF_INET6:
+				ret=sizeof(data->peer.sa_in6);
+				break;
+#endif
+			default:
+				ret=sizeof(data->peer.sa);
+				break;
+			}
+		if (num==0 || num>ret)
+			num=ret;
+		memcpy(ptr,&data->peer,(ret=num));
+		break;
+	case BIO_CTRL_DGRAM_SET_PEER:
+		to = (struct sockaddr *) ptr;
+		switch (to->sa_family)
+			{
+			case AF_INET:
+				memcpy(&data->peer,to,sizeof(data->peer.sa_in));
+				break;
+#if OPENSSL_USE_IPV6
+			case AF_INET6:
+				memcpy(&data->peer,to,sizeof(data->peer.sa_in6));
+				break;
+#endif
+			default:
+				memcpy(&data->peer,to,sizeof(data->peer.sa));
+				break;
+			}
+		break;
+	case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
+		memcpy(&(data->next_timeout), ptr, sizeof(struct timeval));
+		break;
+#if defined(SO_RCVTIMEO)
+	case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
+#ifdef OPENSSL_SYS_WINDOWS
+		{
+		struct timeval *tv = (struct timeval *)ptr;
+		int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
+		if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
+			(void*)&timeout, sizeof(timeout)) < 0)
+			{ perror("setsockopt"); ret = -1; }
+		}
+#else
+		if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
+			sizeof(struct timeval)) < 0)
+			{ perror("setsockopt");	ret = -1; }
+#endif
+		break;
+	case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
+#ifdef OPENSSL_SYS_WINDOWS
+		{
+		int timeout, sz = sizeof(timeout);
+		struct timeval *tv = (struct timeval *)ptr;
+		if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
+			(void*)&timeout, &sz) < 0)
+			{ perror("getsockopt"); ret = -1; }
+		else
+			{
+			tv->tv_sec = timeout / 1000;
+			tv->tv_usec = (timeout % 1000) * 1000;
+			ret = sizeof(*tv);
+			}
+		}
+#else
+		if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, 
+			ptr, (void *)&ret) < 0)
+			{ perror("getsockopt"); ret = -1; }
+#endif
+		break;
+#endif
+#if defined(SO_SNDTIMEO)
+	case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
+#ifdef OPENSSL_SYS_WINDOWS
+		{
+		struct timeval *tv = (struct timeval *)ptr;
+		int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
+		if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
+			(void*)&timeout, sizeof(timeout)) < 0)
+			{ perror("setsockopt"); ret = -1; }
+		}
+#else
+		if ( setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
+			sizeof(struct timeval)) < 0)
+			{ perror("setsockopt");	ret = -1; }
+#endif
+		break;
+	case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
+#ifdef OPENSSL_SYS_WINDOWS
+		{
+		int timeout, sz = sizeof(timeout);
+		struct timeval *tv = (struct timeval *)ptr;
+		if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
+			(void*)&timeout, &sz) < 0)
+			{ perror("getsockopt"); ret = -1; }
+		else
+			{
+			tv->tv_sec = timeout / 1000;
+			tv->tv_usec = (timeout % 1000) * 1000;
+			ret = sizeof(*tv);
+			}
+		}
+#else
+		if ( getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, 
+			ptr, (void *)&ret) < 0)
+			{ perror("getsockopt"); ret = -1; }
+#endif
+		break;
+#endif
+	case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
+		/* fall-through */
+	case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
+#ifdef OPENSSL_SYS_WINDOWS
+		if ( data->_errno == WSAETIMEDOUT)
+#else
+		if ( data->_errno == EAGAIN)
+#endif
+			{
+			ret = 1;
+			data->_errno = 0;
+			}
+		else
+			ret = 0;
+		break;
+#ifdef EMSGSIZE
+	case BIO_CTRL_DGRAM_MTU_EXCEEDED:
+		if ( data->_errno == EMSGSIZE)
+			{
+			ret = 1;
+			data->_errno = 0;
+			}
+		else
+			ret = 0;
+		break;
+#endif
+	default:
+		ret=0;
+		break;
+		}
+	return(ret);
+	}
+
+static int dgram_puts(BIO *bp, const char *str)
+	{
+	int n,ret;
+
+	n=strlen(str);
+	ret=dgram_write(bp,str,n);
+	return(ret);
+	}
+
+static int BIO_dgram_should_retry(int i)
+	{
+	int err;
+
+	if ((i == 0) || (i == -1))
+		{
+		err=get_last_socket_error();
+
+#if defined(OPENSSL_SYS_WINDOWS)
+	/* If the socket return value (i) is -1
+	 * and err is unexpectedly 0 at this point,
+	 * the error code was overwritten by
+	 * another system call before this error
+	 * handling is called.
+	 */
+#endif
+
+		return(BIO_dgram_non_fatal_error(err));
+		}
+	return(0);
+	}
+
+int BIO_dgram_non_fatal_error(int err)
+	{
+	switch (err)
+		{
+#if defined(OPENSSL_SYS_WINDOWS)
+# if defined(WSAEWOULDBLOCK)
+	case WSAEWOULDBLOCK:
+# endif
+
+# if 0 /* This appears to always be an error */
+#  if defined(WSAENOTCONN)
+	case WSAENOTCONN:
+#  endif
+# endif
+#endif
+
+#ifdef EWOULDBLOCK
+# ifdef WSAEWOULDBLOCK
+#  if WSAEWOULDBLOCK != EWOULDBLOCK
+	case EWOULDBLOCK:
+#  endif
+# else
+	case EWOULDBLOCK:
+# endif
+#endif
+
+#ifdef EINTR
+	case EINTR:
+#endif
+
+#ifdef EAGAIN
+#if EWOULDBLOCK != EAGAIN
+	case EAGAIN:
+# endif
+#endif
+
+#ifdef EPROTO
+	case EPROTO:
+#endif
+
+#ifdef EINPROGRESS
+	case EINPROGRESS:
+#endif
+
+#ifdef EALREADY
+	case EALREADY:
+#endif
+
+		return(1);
+		/* break; */
+	default:
+		break;
+		}
+	return(0);
+	}
+
+static void get_current_time(struct timeval *t)
+	{
+#ifdef OPENSSL_SYS_WIN32
+	struct _timeb tb;
+	_ftime(&tb);
+	t->tv_sec = (long)tb.time;
+	t->tv_usec = (long)tb.millitm * 1000;
+#elif defined(OPENSSL_SYS_VMS)
+	struct timeb tb;
+	ftime(&tb);
+	t->tv_sec = (long)tb.time;
+	t->tv_usec = (long)tb.millitm * 1000;
+#else
+	gettimeofday(t, NULL);
+#endif
+	}
+
+#endif