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

/* crypto/bio/bss_sock.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * 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 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 acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS 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 AUTHOR OR 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.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

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

#ifndef OPENSSL_NO_SOCK

#include <openssl/bio.h>

static int sock_write(BIO *h, const char *buf, int num);
static int sock_read(BIO *h, char *buf, int size);
static int sock_puts(BIO *h, const char *str);
static long sock_ctrl(BIO *h, int cmd, long arg1, void *arg2);
static int sock_new(BIO *h);
static int sock_free(BIO *data);
int BIO_sock_should_retry(int s);

static BIO_METHOD methods_sockp=
	{
	BIO_TYPE_SOCKET,
	"socket",
	sock_write,
	sock_read,
	sock_puts,
	NULL, /* sock_gets, */
	sock_ctrl,
	sock_new,
	sock_free,
	NULL,
	};

BIO_METHOD *BIO_s_socket(void)
	{
	return(&methods_sockp);
	}

BIO *BIO_new_socket(int fd, int close_flag)
	{
	BIO *ret;

	ret=BIO_new(BIO_s_socket());
	if (ret == NULL) return(NULL);
	BIO_set_fd(ret,fd,close_flag);
	return(ret);
	}

static int sock_new(BIO *bi)
	{
	bi->init=0;
	bi->num=0;
	bi->ptr=NULL;
	bi->flags=0;
	return(1);
	}

static int sock_free(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 sock_read(BIO *b, char *out, int outl)
	{
	int ret=0;

	if (out != NULL)
		{
		clear_socket_error();
		ret=readsocket(b->num,out,outl);
		BIO_clear_retry_flags(b);
		if (ret <= 0)
			{
			if (BIO_sock_should_retry(ret))
				BIO_set_retry_read(b);
			}
		}
	return(ret);
	}

static int sock_write(BIO *b, const char *in, int inl)
	{
	int ret;
	
	clear_socket_error();
	ret=writesocket(b->num,in,inl);
	BIO_clear_retry_flags(b);
	if (ret <= 0)
		{
		if (BIO_sock_should_retry(ret))
			BIO_set_retry_write(b);
		}
	return(ret);
	}

static long sock_ctrl(BIO *b, int cmd, long num, void *ptr)
	{
	long ret=1;
	int *ip;

	switch (cmd)
		{
	case BIO_C_SET_FD:
		sock_free(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_DUP:
	case BIO_CTRL_FLUSH:
		ret=1;
		break;
	default:
		ret=0;
		break;
		}
	return(ret);
	}

static int sock_puts(BIO *bp, const char *str)
	{
	int n,ret;

	n=strlen(str);
	ret=sock_write(bp,str,n);
	return(ret);
	}

int BIO_sock_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_sock_non_fatal_error(err));
		}
	return(0);
	}

int BIO_sock_non_fatal_error(int err)
	{
	switch (err)
		{
#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_NETWARE)
# 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
		return(1);
		/* break; */
	default:
		break;
		}
	return(0);
	}

#endif  /* #ifndef OPENSSL_NO_SOCK */
Commit	Line	Data
d02b48c6	1	/* crypto/bio/bss_sock.c */
58964a49	2	/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
d02b48c6 RE	3	* All rights reserved.
	4	*
	5	* This package is an SSL implementation written
	6	* by Eric Young (eay@cryptsoft.com).
	7	* The implementation was written so as to conform with Netscapes SSL.
	8	*
	9	* This library is free for commercial and non-commercial use as long as
	10	* the following conditions are aheared to. The following conditions
	11	* apply to all code found in this distribution, be it the RC4, RSA,
	12	* lhash, DES, etc., code; not just the SSL code. The SSL documentation
	13	* included with this distribution is covered by the same copyright terms
	14	* except that the holder is Tim Hudson (tjh@cryptsoft.com).
	15	*
	16	* Copyright remains Eric Young's, and as such any Copyright notices in
	17	* the code are not to be removed.
	18	* If this package is used in a product, Eric Young should be given attribution
	19	* as the author of the parts of the library used.
	20	* This can be in the form of a textual message at program startup or
	21	* in documentation (online or textual) provided with the package.
	22	*
	23	* Redistribution and use in source and binary forms, with or without
	24	* modification, are permitted provided that the following conditions
	25	* are met:
	26	* 1. Redistributions of source code must retain the copyright
	27	* notice, this list of conditions and the following disclaimer.
	28	* 2. Redistributions in binary form must reproduce the above copyright
	29	* notice, this list of conditions and the following disclaimer in the
	30	* documentation and/or other materials provided with the distribution.
	31	* 3. All advertising materials mentioning features or use of this software
	32	* must display the following acknowledgement:
	33	* "This product includes cryptographic software written by
	34	* Eric Young (eay@cryptsoft.com)"
	35	* The word 'cryptographic' can be left out if the rouines from the library
	36	* being used are not cryptographic related :-).
	37	* 4. If you include any Windows specific code (or a derivative thereof) from
	38	* the apps directory (application code) you must include an acknowledgement:
	39	* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
	40	*
	41	* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
	42	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	43	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	44	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	45	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	46	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	47	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	48	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	49	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	50	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	51	* SUCH DAMAGE.
	52	*
	53	* The licence and distribution terms for any publically available version or
	54	* derivative of this code cannot be changed. i.e. this code cannot simply be
	55	* copied and put under another distribution licence
	56	* [including the GNU Public Licence.]
	57	*/
	58
d02b48c6 RE	59	#include <stdio.h>
	60	#include <errno.h>
	61	#define USE_SOCKETS
	62	#include "cryptlib.h"
c836f8ef DSH	63
	64	#ifndef OPENSSL_NO_SOCK
	65
ec577822	66	#include <openssl/bio.h>
d02b48c6	67
0e1c0612 UM	68	static int sock_write(BIO h, const char buf, int num);
	69	static int sock_read(BIO h, char buf, int size);
	70	static int sock_puts(BIO h, const char str);
	71	static long sock_ctrl(BIO h, int cmd, long arg1, void arg2);
d02b48c6 RE	72	static int sock_new(BIO *h);
	73	static int sock_free(BIO *data);
	74	int BIO_sock_should_retry(int s);
d02b48c6	75
d02b48c6 RE	76	static BIO_METHOD methods_sockp=
d02b48c6 RE	77	{
58964a49 RE	78	BIO_TYPE_SOCKET,
58964a49 RE	79	"socket",
d02b48c6 RE	80	sock_write,
	81	sock_read,
	82	sock_puts,
	83	NULL, /* sock_gets, */
	84	sock_ctrl,
	85	sock_new,
	86	sock_free,
d3442bc7	87	NULL,
d02b48c6 RE	88	};
d02b48c6 RE	89
6b691a5c	90	BIO_METHOD *BIO_s_socket(void)
d02b48c6 RE	91	{
	92	return(&methods_sockp);
	93	}
d02b48c6	94
6b691a5c	95	BIO *BIO_new_socket(int fd, int close_flag)
d02b48c6 RE	96	{
	97	BIO *ret;
	98
d02b48c6	99	ret=BIO_new(BIO_s_socket());
d02b48c6 RE	100	if (ret == NULL) return(NULL);
	101	BIO_set_fd(ret,fd,close_flag);
	102	return(ret);
	103	}
	104
6b691a5c	105	static int sock_new(BIO *bi)
d02b48c6 RE	106	{
	107	bi->init=0;
	108	bi->num=0;
	109	bi->ptr=NULL;
	110	bi->flags=0;
	111	return(1);
	112	}
	113
6b691a5c	114	static int sock_free(BIO *a)
d02b48c6 RE	115	{
	116	if (a == NULL) return(0);
	117	if (a->shutdown)
	118	{
	119	if (a->init)
	120	{
17f389bb	121	SHUTDOWN2(a->num);
d02b48c6 RE	122	}
	123	a->init=0;
	124	a->flags=0;
	125	}
	126	return(1);
	127	}
	128
6b691a5c	129	static int sock_read(BIO b, char out, int outl)
d02b48c6 RE	130	{
	131	int ret=0;
	132
	133	if (out != NULL)
	134	{
58964a49	135	clear_socket_error();
dfeab068	136	ret=readsocket(b->num,out,outl);
d02b48c6 RE	137	BIO_clear_retry_flags(b);
	138	if (ret <= 0)
	139	{
d02b48c6	140	if (BIO_sock_should_retry(ret))
d02b48c6 RE	141	BIO_set_retry_read(b);
	142	}
	143	}
	144	return(ret);
	145	}
	146
0e1c0612	147	static int sock_write(BIO b, const char in, int inl)
d02b48c6 RE	148	{
	149	int ret;
	150
58964a49	151	clear_socket_error();
dfeab068	152	ret=writesocket(b->num,in,inl);
d02b48c6 RE	153	BIO_clear_retry_flags(b);
	154	if (ret <= 0)
	155	{
d02b48c6	156	if (BIO_sock_should_retry(ret))
d02b48c6 RE	157	BIO_set_retry_write(b);
	158	}
	159	return(ret);
	160	}
	161
0e1c0612	162	static long sock_ctrl(BIO b, int cmd, long num, void ptr)
d02b48c6 RE	163	{
	164	long ret=1;
	165	int *ip;
	166
	167	switch (cmd)
	168	{
d02b48c6	169	case BIO_C_SET_FD:
d02b48c6	170	sock_free(b);
d02b48c6 RE	171	b->num= ((int )ptr);
	172	b->shutdown=(int)num;
	173	b->init=1;
	174	break;
	175	case BIO_C_GET_FD:
	176	if (b->init)
	177	{
	178	ip=(int *)ptr;
	179	if (ip != NULL) *ip=b->num;
	180	ret=b->num;
	181	}
	182	else
	183	ret= -1;
	184	break;
	185	case BIO_CTRL_GET_CLOSE:
	186	ret=b->shutdown;
	187	break;
	188	case BIO_CTRL_SET_CLOSE:
	189	b->shutdown=(int)num;
	190	break;
d02b48c6 RE	191	case BIO_CTRL_DUP:
	192	case BIO_CTRL_FLUSH:
	193	ret=1;
	194	break;
d02b48c6 RE	195	default:
	196	ret=0;
	197	break;
	198	}
	199	return(ret);
	200	}
	201
0e1c0612	202	static int sock_puts(BIO bp, const char str)
d02b48c6 RE	203	{
	204	int n,ret;
	205
	206	n=strlen(str);
d02b48c6	207	ret=sock_write(bp,str,n);
d02b48c6 RE	208	return(ret);
	209	}
	210
6b691a5c	211	int BIO_sock_should_retry(int i)
d02b48c6	212	{
58964a49 RE	213	int err;
58964a49 RE	214
d02b48c6 RE	215	if ((i == 0) \|\| (i == -1))
d02b48c6 RE	216	{
58964a49	217	err=get_last_socket_error();
d02b48c6	218
bc36ee62	219	#if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */
58964a49	220	if ((i == -1) && (err == 0))
d02b48c6 RE	221	return(1);
d02b48c6 RE	222	#endif
58964a49	223
58964a49	224	return(BIO_sock_non_fatal_error(err));
d02b48c6 RE	225	}
	226	return(0);
	227	}
	228
6b691a5c	229	int BIO_sock_non_fatal_error(int err)
d02b48c6 RE	230	{
	231	switch (err)
	232	{
4d8743f4	233	#if defined(OPENSSL_SYS_WINDOWS) \|\| defined(OPENSSL_SYS_NETWARE)
d02b48c6 RE	234	# if defined(WSAEWOULDBLOCK)
	235	case WSAEWOULDBLOCK:
	236	# endif
	237
dfeab068 RE	238	# if 0 /* This appears to always be an error */
dfeab068 RE	239	# if defined(WSAENOTCONN)
d02b48c6	240	case WSAENOTCONN:
dfeab068	241	# endif
d02b48c6 RE	242	# endif
	243	#endif
	244
	245	#ifdef EWOULDBLOCK
	246	# ifdef WSAEWOULDBLOCK
	247	# if WSAEWOULDBLOCK != EWOULDBLOCK
	248	case EWOULDBLOCK:
	249	# endif
	250	# else
	251	case EWOULDBLOCK:
	252	# endif
	253	#endif
	254
58964a49 RE	255	#if defined(ENOTCONN)
	256	case ENOTCONN:
	257	#endif
	258
d02b48c6 RE	259	#ifdef EINTR
	260	case EINTR:
	261	#endif
	262
	263	#ifdef EAGAIN
9ba4cc00	264	# if EWOULDBLOCK != EAGAIN
d02b48c6 RE	265	case EAGAIN:
	266	# endif
	267	#endif
	268
	269	#ifdef EPROTO
	270	case EPROTO:
	271	#endif
	272
	273	#ifdef EINPROGRESS
	274	case EINPROGRESS:
	275	#endif
	276
	277	#ifdef EALREADY
	278	case EALREADY:
	279	#endif
	280	return(1);
dfeab068	281	/* break; */
d02b48c6 RE	282	default:
	283	break;
	284	}
	285	return(0);
	286	}
c836f8ef DSH	287
c836f8ef DSH	288	#endif /* #ifndef OPENSSL_NO_SOCK */