[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>

#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);

int BIO_dgram_should_retry(int s);

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;
	} 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();
				}
			}
		}
	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=send(b->num,in,inl,0);
    else
        ret=sendto(b->num, in, inl, 0, &data->peer, sizeof(data->peer));

	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_RECV_TIMEOUT:
		if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
			sizeof(struct timeval)) < 0)
			{ perror("setsockopt");	ret = -1; }
		break;
	case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
		if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, 
			ptr, (void *)&ret) < 0)
			{ perror("getsockopt"); ret = -1; }
		break;
	case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
		if ( setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
			sizeof(struct timeval)) < 0)
			{ perror("setsockopt");	ret = -1; }
		break;
	case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
		if ( getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, 
			ptr, (void *)&ret) < 0)
			{ perror("getsockopt"); ret = -1; }
		break;
	case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
		/* fall-through */
	case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
		if ( data->_errno == EAGAIN)
			{
			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);
	}

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
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>
	68
	69	#define IP_MTU 14 /* linux is lame */
	70
	71	#ifdef WATT32
	72	#define sock_write SockWrite /* Watt-32 uses same names */
	73	#define sock_read SockRead
	74	#define sock_puts SockPuts
	75	#endif
	76
	77	static int dgram_write(BIO h, const char buf, int num);
	78	static int dgram_read(BIO h, char buf, int size);
	79	static int dgram_puts(BIO h, const char str);
	80	static long dgram_ctrl(BIO h, int cmd, long arg1, void arg2);
	81	static int dgram_new(BIO *h);
	82	static int dgram_free(BIO *data);
	83	static int dgram_clear(BIO *bio);
	84
	85	int BIO_dgram_should_retry(int s);
	86
	87	static BIO_METHOD methods_dgramp=
	88	{
	89	BIO_TYPE_DGRAM,
	90	"datagram socket",
	91	dgram_write,
	92	dgram_read,
	93	dgram_puts,
	94	NULL, /* dgram_gets, */
	95	dgram_ctrl,
	96	dgram_new,
	97	dgram_free,
	98	NULL,
	99	};
	100
	101	typedef struct bio_dgram_data_st
	102	{
	103	struct sockaddr peer;
	104	unsigned int connected;
	105	unsigned int _errno;
	106	unsigned int mtu;
	107	} bio_dgram_data;
	108
	109	BIO_METHOD *BIO_s_datagram(void)
	110	{
	111	return(&methods_dgramp);
	112	}
	113
	114	BIO *BIO_new_dgram(int fd, int close_flag)
	115	{
	116	BIO *ret;
	117
	118	ret=BIO_new(BIO_s_datagram());
	119	if (ret == NULL) return(NULL);
	120	BIO_set_fd(ret,fd,close_flag);
	121	return(ret);
	122	}
	123
	124	static int dgram_new(BIO *bi)
	125	{
	126	bio_dgram_data *data = NULL;
	127
	128	bi->init=0;
	129	bi->num=0;
	130	data = OPENSSL_malloc(sizeof(bio_dgram_data));
131	if (data == NULL)
132	return 0;
133	memset(data, 0x00, sizeof(bio_dgram_data));
134	bi->ptr = data;
135
136	bi->flags=0;
137	return(1);
138	}
139
140	static int dgram_free(BIO *a)
141	{
142	bio_dgram_data *data;
143
144	if (a == NULL) return(0);
145	if ( ! dgram_clear(a))
146	return 0;
147
148	data = (bio_dgram_data *)a->ptr;
149	if(data != NULL) OPENSSL_free(data);
150
151	return(1);
152	}
153
154	static int dgram_clear(BIO *a)
155	{
156	if (a == NULL) return(0);
157	if (a->shutdown)
158	{
159	if (a->init)
160	{
161	SHUTDOWN2(a->num);
162	}
163	a->init=0;
164	a->flags=0;
165	}
166	return(1);
167	}
168
169	static int dgram_read(BIO b, char out, int outl)
170	{
171	int ret=0;
172	bio_dgram_data data = (bio_dgram_data )b->ptr;
173
174	struct sockaddr peer;
6c61726b	175	int peerlen = sizeof(peer);
36d16f8e BL	176
	177	if (out != NULL)
	178	{
	179	clear_socket_error();
	180	memset(&peer, 0x00, peerlen);
6c61726b DSH	181	/* Last arg in recvfrom is signed on some platforms and
	182	* unsigned on others. It is of type socklen_t on some
	183	* but this is not universal. Cast to (void *) to avoid
	184	* compiler warnings.
	185	*/
	186	ret=recvfrom(b->num,out,outl,0,&peer,(void *)&peerlen);
36d16f8e BL	187
	188	if ( ! data->connected && ret > 0)
	189	BIO_ctrl(b, BIO_CTRL_DGRAM_CONNECT, 0, &peer);
	190
	191	BIO_clear_retry_flags(b);
	192	if (ret <= 0)
	193	{
	194	if (BIO_dgram_should_retry(ret))
	195	{
	196	BIO_set_retry_read(b);
	197	data->_errno = get_last_socket_error();
	198	}
	199	}
	200	}
	201	return(ret);
	202	}
	203
	204	static int dgram_write(BIO b, const char in, int inl)
	205	{
	206	int ret;
	207	bio_dgram_data data = (bio_dgram_data )b->ptr;
	208	clear_socket_error();
	209
	210	if ( data->connected )
	211	ret=send(b->num,in,inl,0);
	212	else
	213	ret=sendto(b->num, in, inl, 0, &data->peer, sizeof(data->peer));
	214
	215	BIO_clear_retry_flags(b);
	216	if (ret <= 0)
	217	{
	218	if (BIO_sock_should_retry(ret))
	219	{
	220	BIO_set_retry_write(b);
	221	data->_errno = get_last_socket_error();
	222
	223	#if 0 /* higher layers are responsible for querying MTU, if necessary */
	224	if ( data->_errno == EMSGSIZE)
	225	/* retrieve the new MTU */
	226	BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
	227	#endif
	228	}
	229	}
	230	return(ret);
	231	}
	232
	233	static long dgram_ctrl(BIO b, int cmd, long num, void ptr)
	234	{
	235	long ret=1;
	236	int *ip;
	237	struct sockaddr *to = NULL;
	238	bio_dgram_data *data = NULL;
	239	long sockopt_val = 0;
	240	unsigned int sockopt_len = 0;
	241
	242	data = (bio_dgram_data *)b->ptr;
	243
	244	switch (cmd)
	245	{
	246	case BIO_CTRL_RESET:
	247	num=0;
	248	case BIO_C_FILE_SEEK:
	249	ret=0;
	250	break;
251	case BIO_C_FILE_TELL:
252	case BIO_CTRL_INFO:
253	ret=0;
254	break;
255	case BIO_C_SET_FD:
256	dgram_clear(b);
257	b->num= ((int )ptr);
258	b->shutdown=(int)num;
259	b->init=1;
260	break;
261	case BIO_C_GET_FD:
262	if (b->init)
263	{
264	ip=(int *)ptr;
265	if (ip != NULL) *ip=b->num;
266	ret=b->num;
267	}
268	else
269	ret= -1;
270	break;
271	case BIO_CTRL_GET_CLOSE:
272	ret=b->shutdown;
273	break;
274	case BIO_CTRL_SET_CLOSE:
275	b->shutdown=(int)num;
276	break;
277	case BIO_CTRL_PENDING:
278	case BIO_CTRL_WPENDING:
279	ret=0;
280	break;
281	case BIO_CTRL_DUP:
282	case BIO_CTRL_FLUSH:
283	ret=1;
284	break;
285	case BIO_CTRL_DGRAM_CONNECT:
286	to = (struct sockaddr *)ptr;
287	#if 0
288	if (connect(b->num, to, sizeof(struct sockaddr)) < 0)
289	{ perror("connect"); ret = 0; }
290	else
291	{
292	#endif
293	memcpy(&(data->peer),to, sizeof(struct sockaddr));
294	#if 0
295	}
296	#endif
297	break;
298	/* (Linux)kernel sets DF bit on outgoing IP packets */
299	#ifdef IP_MTU_DISCOVER
300	case BIO_CTRL_DGRAM_MTU_DISCOVER:
301	sockopt_val = IP_PMTUDISC_DO;
302	if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
303	&sockopt_val, sizeof(sockopt_val))) < 0)
304	perror("setsockopt");
305	break;
306	#endif
307	case BIO_CTRL_DGRAM_QUERY_MTU:
308	sockopt_len = sizeof(sockopt_val);
6c61726b	309	if ((ret = getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
36d16f8e BL	310	&sockopt_len)) < 0 \|\| sockopt_val < 0)
	311	{ ret = 0; }
	312	else
	313	{
	314	data->mtu = sockopt_val;
	315	ret = data->mtu;
	316	}
	317	break;
	318	case BIO_CTRL_DGRAM_GET_MTU:
	319	return data->mtu;
	320	break;
	321	case BIO_CTRL_DGRAM_SET_MTU:
	322	data->mtu = num;
	323	ret = num;
	324	break;
	325	case BIO_CTRL_DGRAM_SET_CONNECTED:
	326	to = (struct sockaddr *)ptr;
	327
	328	if ( to != NULL)
	329	{
	330	data->connected = 1;
	331	memcpy(&(data->peer),to, sizeof(struct sockaddr));
	332	}
	333	else
	334	{
	335	data->connected = 0;
	336	memset(&(data->peer), 0x00, sizeof(struct sockaddr));
	337	}
	338	break;
	339	case BIO_CTRL_DGRAM_SET_PEER:
	340	to = (struct sockaddr *) ptr;
	341
	342	memcpy(&(data->peer), to, sizeof(struct sockaddr));
	343	break;
	344	case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
	345	if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
	346	sizeof(struct timeval)) < 0)
	347	{ perror("setsockopt"); ret = -1; }
	348	break;
	349	case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
	350	if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
6c61726b	351	ptr, (void *)&ret) < 0)
36d16f8e BL	352	{ perror("getsockopt"); ret = -1; }
	353	break;
	354	case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
	355	if ( setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
	356	sizeof(struct timeval)) < 0)
	357	{ perror("setsockopt"); ret = -1; }
	358	break;
	359	case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
	360	if ( getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
6c61726b	361	ptr, (void *)&ret) < 0)
36d16f8e BL	362	{ perror("getsockopt"); ret = -1; }
	363	break;
	364	case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
	365	/* fall-through */
	366	case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
	367	if ( data->_errno == EAGAIN)
	368	{
	369	ret = 1;
	370	data->_errno = 0;
	371	}
	372	else
	373	ret = 0;
	374	break;
6c61726b	375	#ifdef EMSGSIZE
36d16f8e BL	376	case BIO_CTRL_DGRAM_MTU_EXCEEDED:
	377	if ( data->_errno == EMSGSIZE)
	378	{
	379	ret = 1;
	380	data->_errno = 0;
	381	}
	382	else
	383	ret = 0;
	384	break;
6c61726b	385	#endif
36d16f8e BL	386	default:
	387	ret=0;
	388	break;
	389	}
	390	return(ret);
	391	}
	392
	393	static int dgram_puts(BIO bp, const char str)
	394	{
	395	int n,ret;
	396
	397	n=strlen(str);
	398	ret=dgram_write(bp,str,n);
	399	return(ret);
	400	}
	401
	402	int BIO_dgram_should_retry(int i)
	403	{
	404	int err;
	405
	406	if ((i == 0) \|\| (i == -1))
	407	{
	408	err=get_last_socket_error();
	409
	410	#if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */
	411	if ((i == -1) && (err == 0))
	412	return(1);
	413	#endif
	414
	415	return(BIO_dgram_non_fatal_error(err));
	416	}
	417	return(0);
	418	}
	419
	420	int BIO_dgram_non_fatal_error(int err)
	421	{
	422	switch (err)
	423	{
	424	#if defined(OPENSSL_SYS_WINDOWS)
	425	# if defined(WSAEWOULDBLOCK)
	426	case WSAEWOULDBLOCK:
	427	# endif
	428
	429	# if 0 /* This appears to always be an error */
	430	# if defined(WSAENOTCONN)
	431	case WSAENOTCONN:
	432	# endif
	433	# endif
	434	#endif
	435
	436	#ifdef EWOULDBLOCK
	437	# ifdef WSAEWOULDBLOCK
	438	# if WSAEWOULDBLOCK != EWOULDBLOCK
	439	case EWOULDBLOCK:
	440	# endif
	441	# else
	442	case EWOULDBLOCK:
	443	# endif
	444	#endif
	445
	446	#if defined(ENOTCONN)
	447	case ENOTCONN:
	448	#endif
	449
450	#ifdef EINTR
451	case EINTR:
452	#endif
453
454	#ifdef EAGAIN
455	#if EWOULDBLOCK != EAGAIN
456	case EAGAIN:
457	# endif
458	#endif
459
460	#ifdef EPROTO
461	case EPROTO:
462	#endif
463
464	#ifdef EINPROGRESS
465	case EINPROGRESS:
466	#endif
467
468	#ifdef EALREADY
469	case EALREADY:
470	#endif
471
472	/* DF bit set, and packet larger than MTU */
473	#ifdef EMSGSIZE
474	case EMSGSIZE:
475	#endif
476
477	return(1);
478	/* break; */
479	default:
480	break;
481	}
482	return(0);
483	}
484	#endif