[thirdparty/openssl.git] / crypto / bio / bss_dgram.c

/* 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).
 *
 */

#ifndef OPENSSL_NO_DGRAM

#include <stdio.h>
#include <errno.h>
#define USE_SOCKETS
#include "cryptlib.h"

#include <openssl/bio.h>

#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS)
#include <sys/timeb.h>
#endif

#define IP_MTU      14 /* linux is lame */

#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
	{
	struct sockaddr peer;
	unsigned int connected;
	unsigned int _errno;
	unsigned int mtu;
	struct timeval hstimeoutdiff;
	struct timeval hstimeout;
	} 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 int dgram_read(BIO *b, char *out, int outl)
	{
	int ret=0;
	bio_dgram_data *data = (bio_dgram_data *)b->ptr;

	struct sockaddr peer;
	int peerlen = sizeof(peer);

	if (out != NULL)
		{
		clear_socket_error();
		memset(&peer, 0x00, peerlen);
		/* Last arg in recvfrom is signed on some platforms and
		 * unsigned on others. It is of type socklen_t on some
		 * but this is not universal. Cast to (void *) to avoid
		 * compiler warnings.
		 */
		ret=recvfrom(b->num,out,outl,0,&peer,(void *)&peerlen);

		if ( ! data->connected  && ret > 0)
			BIO_ctrl(b, BIO_CTRL_DGRAM_CONNECT, 0, &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();
				}
			memset(&(data->hstimeout), 0, sizeof(struct timeval));
			}
		else
			{
			if (data->hstimeout.tv_sec > 0 || data->hstimeout.tv_usec > 0)
				{
				struct timeval curtime;
				get_current_time(&curtime);

				if (curtime.tv_sec >= data->hstimeout.tv_sec &&
					curtime.tv_usec >= data->hstimeout.tv_usec)
					{
					data->_errno = EAGAIN;
					ret = -1;
					memset(&(data->hstimeout), 0, sizeof(struct timeval));
					}
				}
			}
		}
	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
#if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
        ret=sendto(b->num, (char *)in, inl, 0, &data->peer, sizeof(data->peer));
#else
        ret=sendto(b->num, in, inl, 0, &data->peer, sizeof(data->peer));
#endif

	BIO_clear_retry_flags(b);
	if (ret <= 0)
		{
		if (BIO_sock_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;
	long sockopt_val = 0;
	unsigned int sockopt_len = 0;

	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
			memcpy(&(data->peer),to, sizeof(struct sockaddr));
#if 0
			}
#endif
		break;
		/* (Linux)kernel sets DF bit on outgoing IP packets */
#ifdef IP_MTU_DISCOVER
	case BIO_CTRL_DGRAM_MTU_DISCOVER:
		sockopt_val = IP_PMTUDISC_DO;
		if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
			&sockopt_val, sizeof(sockopt_val))) < 0)
			perror("setsockopt");
		break;
#endif
	case BIO_CTRL_DGRAM_QUERY_MTU:
         sockopt_len = sizeof(sockopt_val);
		if ((ret = getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
			&sockopt_len)) < 0 || sockopt_val < 0)
			{ ret = 0; }
		else
			{
			data->mtu = sockopt_val;
			ret = data->mtu;
			}
		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;
			memcpy(&(data->peer),to, sizeof(struct sockaddr));
			}
		else
			{
			data->connected = 0;
			memset(&(data->peer), 0x00, sizeof(struct sockaddr));
			}
		break;
    case BIO_CTRL_DGRAM_SET_PEER:
        to = (struct sockaddr *) ptr;

        memcpy(&(data->peer), to, sizeof(struct sockaddr));
        break;
	case BIO_CTRL_DGRAM_SET_TIMEOUT:
		if (num > 0)
			{
			get_current_time(&data->hstimeout);
			data->hstimeout.tv_sec += data->hstimeoutdiff.tv_sec;
			data->hstimeout.tv_usec += data->hstimeoutdiff.tv_usec;
			if (data->hstimeout.tv_usec >= 1000000)
				{
				data->hstimeout.tv_sec++;
				data->hstimeout.tv_usec -= 1000000;
				}
			}
		else
			{
			memset(&(data->hstimeout), 0, 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
		memcpy(&(data->hstimeoutdiff), ptr, sizeof(struct timeval));
		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) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */
		if ((i == -1) && (err == 0))
			return(1);
#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

#if defined(ENOTCONN)
	case ENOTCONN:
#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

/* DF bit set, and packet larger than MTU */
#ifdef EMSGSIZE
	case EMSGSIZE:
#endif

		return(1);
		/* break; */
	default:
		break;
		}
	return(0);
	}
#endif

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
	}
Commit	Line	Data
36d16f8e BL	1	/* crypto/bio/bio_dgram.c */
	2	/*
	3	* DTLS implementation written by Nagendra Modadugu
	4	* (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
	5	*/
	6	/* ====================================================================
	7	* Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
	8	*
	9	* Redistribution and use in source and binary forms, with or without
	10	* modification, are permitted provided that the following conditions
	11	* are met:
	12	*
	13	* 1. Redistributions of source code must retain the above copyright
	14	* notice, this list of conditions and the following disclaimer.
	15	*
	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
	19	* distribution.
	20	*
	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/)"
	25	*
	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.
	30	*
	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.
	34	*
	35	* 6. Redistributions of any form whatsoever must retain the following
	36	* acknowledgment:
	37	* "This product includes software developed by the OpenSSL Project
	38	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	39	*
	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	* ====================================================================
	53	*
	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).
	57	*
	58	*/
	59
	60	#ifndef OPENSSL_NO_DGRAM
	61
	62	#include <stdio.h>
	63	#include <errno.h>
	64	#define USE_SOCKETS
65	#include "cryptlib.h"
66
36d16f8e BL	67	#include <openssl/bio.h>
36d16f8e BL	68
3c3f98dc	69	#if defined(OPENSSL_SYS_WIN32) \|\| defined(OPENSSL_SYS_VMS)
e5fa864f DSH	70	#include <sys/timeb.h>
	71	#endif
	72
36d16f8e BL	73	#define IP_MTU 14 /* linux is lame */
	74
	75	#ifdef WATT32
	76	#define sock_write SockWrite /* Watt-32 uses same names */
	77	#define sock_read SockRead
	78	#define sock_puts SockPuts
	79	#endif
	80
	81	static int dgram_write(BIO h, const char buf, int num);
	82	static int dgram_read(BIO h, char buf, int size);
	83	static int dgram_puts(BIO h, const char str);
	84	static long dgram_ctrl(BIO h, int cmd, long arg1, void arg2);
	85	static int dgram_new(BIO *h);
	86	static int dgram_free(BIO *data);
	87	static int dgram_clear(BIO *bio);
	88
b3e72fc3	89	static int BIO_dgram_should_retry(int s);
36d16f8e	90
5d6a0179 RL	91	static void get_current_time(struct timeval *t);
5d6a0179 RL	92
36d16f8e BL	93	static BIO_METHOD methods_dgramp=
	94	{
	95	BIO_TYPE_DGRAM,
	96	"datagram socket",
	97	dgram_write,
	98	dgram_read,
	99	dgram_puts,
	100	NULL, /* dgram_gets, */
	101	dgram_ctrl,
	102	dgram_new,
	103	dgram_free,
	104	NULL,
	105	};
	106
	107	typedef struct bio_dgram_data_st
	108	{
	109	struct sockaddr peer;
	110	unsigned int connected;
	111	unsigned int _errno;
	112	unsigned int mtu;
e5fa864f DSH	113	struct timeval hstimeoutdiff;
e5fa864f DSH	114	struct timeval hstimeout;
36d16f8e BL	115	} bio_dgram_data;
	116
	117	BIO_METHOD *BIO_s_datagram(void)
	118	{
	119	return(&methods_dgramp);
	120	}
	121
	122	BIO *BIO_new_dgram(int fd, int close_flag)
	123	{
	124	BIO *ret;
	125
	126	ret=BIO_new(BIO_s_datagram());
	127	if (ret == NULL) return(NULL);
	128	BIO_set_fd(ret,fd,close_flag);
	129	return(ret);
	130	}
	131
	132	static int dgram_new(BIO *bi)
	133	{
	134	bio_dgram_data *data = NULL;
	135
	136	bi->init=0;
	137	bi->num=0;
	138	data = OPENSSL_malloc(sizeof(bio_dgram_data));
	139	if (data == NULL)
	140	return 0;
	141	memset(data, 0x00, sizeof(bio_dgram_data));
	142	bi->ptr = data;
	143
	144	bi->flags=0;
	145	return(1);
	146	}
	147
	148	static int dgram_free(BIO *a)
	149	{
	150	bio_dgram_data *data;
	151
	152	if (a == NULL) return(0);
	153	if ( ! dgram_clear(a))
	154	return 0;
	155
	156	data = (bio_dgram_data *)a->ptr;
	157	if(data != NULL) OPENSSL_free(data);
	158
	159	return(1);
	160	}
	161
	162	static int dgram_clear(BIO *a)
	163	{
	164	if (a == NULL) return(0);
	165	if (a->shutdown)
	166	{
	167	if (a->init)
	168	{
	169	SHUTDOWN2(a->num);
	170	}
	171	a->init=0;
	172	a->flags=0;
	173	}
	174	return(1);
	175	}
	176
	177	static int dgram_read(BIO b, char out, int outl)
	178	{
179	int ret=0;
180	bio_dgram_data data = (bio_dgram_data )b->ptr;
181
182	struct sockaddr peer;
6c61726b	183	int peerlen = sizeof(peer);
36d16f8e BL	184
	185	if (out != NULL)
	186	{
	187	clear_socket_error();
	188	memset(&peer, 0x00, peerlen);
6c61726b DSH	189	/* Last arg in recvfrom is signed on some platforms and
	190	* unsigned on others. It is of type socklen_t on some
	191	* but this is not universal. Cast to (void *) to avoid
	192	* compiler warnings.
	193	*/
	194	ret=recvfrom(b->num,out,outl,0,&peer,(void *)&peerlen);
36d16f8e BL	195
	196	if ( ! data->connected && ret > 0)
	197	BIO_ctrl(b, BIO_CTRL_DGRAM_CONNECT, 0, &peer);
	198
	199	BIO_clear_retry_flags(b);
	200	if (ret <= 0)
	201	{
	202	if (BIO_dgram_should_retry(ret))
	203	{
	204	BIO_set_retry_read(b);
	205	data->_errno = get_last_socket_error();
	206	}
e5fa864f DSH	207	memset(&(data->hstimeout), 0, sizeof(struct timeval));
	208	}
	209	else
	210	{
	211	if (data->hstimeout.tv_sec > 0 \|\| data->hstimeout.tv_usec > 0)
	212	{
	213	struct timeval curtime;
5d6a0179	214	get_current_time(&curtime);
e5fa864f DSH	215
	216	if (curtime.tv_sec >= data->hstimeout.tv_sec &&
	217	curtime.tv_usec >= data->hstimeout.tv_usec)
	218	{
	219	data->_errno = EAGAIN;
	220	ret = -1;
	221	memset(&(data->hstimeout), 0, sizeof(struct timeval));
	222	}
	223	}
36d16f8e BL	224	}
	225	}
	226	return(ret);
	227	}
	228
	229	static int dgram_write(BIO b, const char in, int inl)
	230	{
	231	int ret;
	232	bio_dgram_data data = (bio_dgram_data )b->ptr;
	233	clear_socket_error();
	234
	235	if ( data->connected )
eef0c1f3	236	ret=writesocket(b->num,in,inl);
36d16f8e	237	else
eef0c1f3 DSH	238	#if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK)
	239	ret=sendto(b->num, (char *)in, inl, 0, &data->peer, sizeof(data->peer));
	240	#else
36d16f8e	241	ret=sendto(b->num, in, inl, 0, &data->peer, sizeof(data->peer));
eef0c1f3	242	#endif
36d16f8e BL	243
	244	BIO_clear_retry_flags(b);
	245	if (ret <= 0)
	246	{
	247	if (BIO_sock_should_retry(ret))
	248	{
	249	BIO_set_retry_write(b);
	250	data->_errno = get_last_socket_error();
	251
	252	#if 0 /* higher layers are responsible for querying MTU, if necessary */
	253	if ( data->_errno == EMSGSIZE)
	254	/* retrieve the new MTU */
	255	BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
	256	#endif
	257	}
	258	}
	259	return(ret);
	260	}
	261
	262	static long dgram_ctrl(BIO b, int cmd, long num, void ptr)
	263	{
	264	long ret=1;
	265	int *ip;
	266	struct sockaddr *to = NULL;
	267	bio_dgram_data *data = NULL;
	268	long sockopt_val = 0;
	269	unsigned int sockopt_len = 0;
	270
	271	data = (bio_dgram_data *)b->ptr;
	272
	273	switch (cmd)
	274	{
	275	case BIO_CTRL_RESET:
	276	num=0;
	277	case BIO_C_FILE_SEEK:
	278	ret=0;
	279	break;
	280	case BIO_C_FILE_TELL:
	281	case BIO_CTRL_INFO:
	282	ret=0;
	283	break;
	284	case BIO_C_SET_FD:
	285	dgram_clear(b);
	286	b->num= ((int )ptr);
	287	b->shutdown=(int)num;
	288	b->init=1;
	289	break;
	290	case BIO_C_GET_FD:
	291	if (b->init)
	292	{
	293	ip=(int *)ptr;
	294	if (ip != NULL) *ip=b->num;
	295	ret=b->num;
	296	}
	297	else
	298	ret= -1;
	299	break;
	300	case BIO_CTRL_GET_CLOSE:
	301	ret=b->shutdown;
	302	break;
	303	case BIO_CTRL_SET_CLOSE:
	304	b->shutdown=(int)num;
	305	break;
	306	case BIO_CTRL_PENDING:
307	case BIO_CTRL_WPENDING:
308	ret=0;
309	break;
310	case BIO_CTRL_DUP:
311	case BIO_CTRL_FLUSH:
312	ret=1;
313	break;
314	case BIO_CTRL_DGRAM_CONNECT:
315	to = (struct sockaddr *)ptr;
316	#if 0
317	if (connect(b->num, to, sizeof(struct sockaddr)) < 0)
318	{ perror("connect"); ret = 0; }
319	else
320	{
321	#endif
322	memcpy(&(data->peer),to, sizeof(struct sockaddr));
323	#if 0
324	}
325	#endif
326	break;
327	/* (Linux)kernel sets DF bit on outgoing IP packets */
328	#ifdef IP_MTU_DISCOVER
329	case BIO_CTRL_DGRAM_MTU_DISCOVER:
330	sockopt_val = IP_PMTUDISC_DO;
331	if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
332	&sockopt_val, sizeof(sockopt_val))) < 0)
333	perror("setsockopt");
334	break;
335	#endif
336	case BIO_CTRL_DGRAM_QUERY_MTU:
337	sockopt_len = sizeof(sockopt_val);
6c61726b	338	if ((ret = getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
36d16f8e BL	339	&sockopt_len)) < 0 \|\| sockopt_val < 0)
	340	{ ret = 0; }
	341	else
	342	{
	343	data->mtu = sockopt_val;
	344	ret = data->mtu;
	345	}
	346	break;
	347	case BIO_CTRL_DGRAM_GET_MTU:
	348	return data->mtu;
	349	break;
	350	case BIO_CTRL_DGRAM_SET_MTU:
	351	data->mtu = num;
	352	ret = num;
	353	break;
	354	case BIO_CTRL_DGRAM_SET_CONNECTED:
	355	to = (struct sockaddr *)ptr;
	356
	357	if ( to != NULL)
	358	{
	359	data->connected = 1;
	360	memcpy(&(data->peer),to, sizeof(struct sockaddr));
	361	}
	362	else
	363	{
	364	data->connected = 0;
	365	memset(&(data->peer), 0x00, sizeof(struct sockaddr));
	366	}
	367	break;
	368	case BIO_CTRL_DGRAM_SET_PEER:
	369	to = (struct sockaddr *) ptr;
	370
	371	memcpy(&(data->peer), to, sizeof(struct sockaddr));
	372	break;
e5fa864f DSH	373	case BIO_CTRL_DGRAM_SET_TIMEOUT:
	374	if (num > 0)
	375	{
5d6a0179	376	get_current_time(&data->hstimeout);
e5fa864f DSH	377	data->hstimeout.tv_sec += data->hstimeoutdiff.tv_sec;
	378	data->hstimeout.tv_usec += data->hstimeoutdiff.tv_usec;
	379	if (data->hstimeout.tv_usec >= 1000000)
	380	{
	381	data->hstimeout.tv_sec++;
	382	data->hstimeout.tv_usec -= 1000000;
	383	}
	384	}
	385	else
	386	{
	387	memset(&(data->hstimeout), 0, sizeof(struct timeval));
	388	}
	389	break;
4700aea9	390	#if defined(SO_RCVTIMEO)
36d16f8e	391	case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
b9790c1c AP	392	#ifdef OPENSSL_SYS_WINDOWS
	393	{
	394	struct timeval tv = (struct timeval )ptr;
	395	int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
d7235a9d	396	if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
b9790c1c AP	397	(void*)&timeout, sizeof(timeout)) < 0)
	398	{ perror("setsockopt"); ret = -1; }
	399	}
	400	#else
36d16f8e BL	401	if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
	402	sizeof(struct timeval)) < 0)
	403	{ perror("setsockopt"); ret = -1; }
b9790c1c	404	#endif
e5fa864f	405	memcpy(&(data->hstimeoutdiff), ptr, sizeof(struct timeval));
36d16f8e BL	406	break;
36d16f8e BL	407	case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
b9790c1c AP	408	#ifdef OPENSSL_SYS_WINDOWS
	409	{
	410	int timeout, sz = sizeof(timeout);
	411	struct timeval tv = (struct timeval )ptr;
d7235a9d AP	412	if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
d7235a9d AP	413	(void*)&timeout, &sz) < 0)
b9790c1c AP	414	{ perror("getsockopt"); ret = -1; }
	415	else
	416	{
	417	tv->tv_sec = timeout / 1000;
	418	tv->tv_usec = (timeout % 1000) * 1000;
	419	ret = sizeof(*tv);
	420	}
	421	}
	422	#else
36d16f8e	423	if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
6c61726b	424	ptr, (void *)&ret) < 0)
36d16f8e	425	{ perror("getsockopt"); ret = -1; }
b9790c1c	426	#endif
36d16f8e	427	break;
4700aea9 UM	428	#endif
4700aea9 UM	429	#if defined(SO_SNDTIMEO)
36d16f8e	430	case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
b9790c1c AP	431	#ifdef OPENSSL_SYS_WINDOWS
	432	{
	433	struct timeval tv = (struct timeval )ptr;
	434	int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000;
d7235a9d	435	if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
b9790c1c AP	436	(void*)&timeout, sizeof(timeout)) < 0)
	437	{ perror("setsockopt"); ret = -1; }
	438	}
	439	#else
36d16f8e BL	440	if ( setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
	441	sizeof(struct timeval)) < 0)
	442	{ perror("setsockopt"); ret = -1; }
b9790c1c	443	#endif
36d16f8e BL	444	break;
36d16f8e BL	445	case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
b9790c1c AP	446	#ifdef OPENSSL_SYS_WINDOWS
	447	{
	448	int timeout, sz = sizeof(timeout);
	449	struct timeval tv = (struct timeval )ptr;
d7235a9d AP	450	if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
d7235a9d AP	451	(void*)&timeout, &sz) < 0)
b9790c1c AP	452	{ perror("getsockopt"); ret = -1; }
	453	else
	454	{
	455	tv->tv_sec = timeout / 1000;
	456	tv->tv_usec = (timeout % 1000) * 1000;
	457	ret = sizeof(*tv);
	458	}
	459	}
	460	#else
36d16f8e	461	if ( getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
6c61726b	462	ptr, (void *)&ret) < 0)
36d16f8e	463	{ perror("getsockopt"); ret = -1; }
b9790c1c	464	#endif
36d16f8e	465	break;
4700aea9	466	#endif
36d16f8e BL	467	case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
	468	/* fall-through */
	469	case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
b9790c1c	470	#ifdef OPENSSL_SYS_WINDOWS
d7235a9d	471	if ( data->_errno == WSAETIMEDOUT)
b9790c1c	472	#else
36d16f8e	473	if ( data->_errno == EAGAIN)
b9790c1c	474	#endif
36d16f8e BL	475	{
	476	ret = 1;
	477	data->_errno = 0;
	478	}
	479	else
	480	ret = 0;
	481	break;
6c61726b	482	#ifdef EMSGSIZE
36d16f8e BL	483	case BIO_CTRL_DGRAM_MTU_EXCEEDED:
	484	if ( data->_errno == EMSGSIZE)
	485	{
	486	ret = 1;
	487	data->_errno = 0;
	488	}
	489	else
	490	ret = 0;
	491	break;
6c61726b	492	#endif
36d16f8e BL	493	default:
	494	ret=0;
	495	break;
	496	}
	497	return(ret);
	498	}
	499
	500	static int dgram_puts(BIO bp, const char str)
	501	{
	502	int n,ret;
	503
	504	n=strlen(str);
	505	ret=dgram_write(bp,str,n);
	506	return(ret);
	507	}
	508
b3e72fc3	509	static int BIO_dgram_should_retry(int i)
36d16f8e BL	510	{
	511	int err;
	512
	513	if ((i == 0) \|\| (i == -1))
	514	{
	515	err=get_last_socket_error();
	516
	517	#if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */
	518	if ((i == -1) && (err == 0))
	519	return(1);
	520	#endif
	521
	522	return(BIO_dgram_non_fatal_error(err));
	523	}
	524	return(0);
	525	}
	526
	527	int BIO_dgram_non_fatal_error(int err)
	528	{
	529	switch (err)
	530	{
	531	#if defined(OPENSSL_SYS_WINDOWS)
	532	# if defined(WSAEWOULDBLOCK)
	533	case WSAEWOULDBLOCK:
	534	# endif
	535
	536	# if 0 /* This appears to always be an error */
	537	# if defined(WSAENOTCONN)
	538	case WSAENOTCONN:
	539	# endif
	540	# endif
	541	#endif
	542
	543	#ifdef EWOULDBLOCK
	544	# ifdef WSAEWOULDBLOCK
	545	# if WSAEWOULDBLOCK != EWOULDBLOCK
	546	case EWOULDBLOCK:
	547	# endif
	548	# else
	549	case EWOULDBLOCK:
	550	# endif
	551	#endif
	552
	553	#if defined(ENOTCONN)
	554	case ENOTCONN:
	555	#endif
	556
	557	#ifdef EINTR
	558	case EINTR:
	559	#endif
	560
	561	#ifdef EAGAIN
	562	#if EWOULDBLOCK != EAGAIN
	563	case EAGAIN:
	564	# endif
	565	#endif
	566
	567	#ifdef EPROTO
	568	case EPROTO:
	569	#endif
	570
	571	#ifdef EINPROGRESS
	572	case EINPROGRESS:
	573	#endif
574
575	#ifdef EALREADY
576	case EALREADY:
577	#endif
578
579	/* DF bit set, and packet larger than MTU */
580	#ifdef EMSGSIZE
581	case EMSGSIZE:
582	#endif
583
584	return(1);
585	/* break; */
586	default:
587	break;
588	}
589	return(0);
590	}
591	#endif
5d6a0179 RL	592
	593	static void get_current_time(struct timeval *t)
	594	{
	595	#ifdef OPENSSL_SYS_WIN32
	596	struct _timeb tb;
	597	_ftime(&tb);
	598	t->tv_sec = (long)tb.time;
	599	t->tv_usec = (long)tb.millitm * 1000;
	600	#elif defined(OPENSSL_SYS_VMS)
	601	struct timeb tb;
	602	ftime(&tb);
	603	t->tv_sec = (long)tb.time;
	604	t->tv_usec = (long)tb.millitm * 1000;
	605	#else
	606	gettimeofday(t, NULL);
	607	#endif
	608	}