crypto/bio/bss_sock.c - platform/external/openssl - Git at Google

 /* 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>

 #ifdef WATT32
 #define sock_write SockWrite  /* Watt-32 uses same names */
 #define sock_read  SockRead
 #define sock_puts  SockPuts
 #endif

 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 */
	/* 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>

	#ifdef WATT32
	#define sock_write SockWrite /* Watt-32 uses same names */
	#define sock_read SockRead
	#define sock_puts SockPuts
	#endif

	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 */