/* 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.]

 */

/*

 © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

 */

#include <stdio.h>

#include <errno.h>

#define USE_SOCKETS

#include "cryptlib.h"

#include <openssl/bio.h>

#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

#include "libcrypto_wsd_macros.h"

#include "libcrypto_wsd.h"

#endif

#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);

#ifndef EMULATOR

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,

	};

#else

GET_STATIC_VAR_FROM_TLS(methods_sockp,bss_sock,BIO_METHOD)

#define methods_sockp (*GET_WSD_VAR_NAME(methods_sockp,bss_sock,s)())

BIO_METHOD const temp_s_methods_sockp=

	{

	BIO_TYPE_SOCKET,

	"socket",

	sock_write,

	sock_read,

	sock_puts,

	NULL, /* sock_gets, */

	sock_ctrl,

	sock_new,

	sock_free,

	NULL,

	};

#endif	

EXPORT_C BIO_METHOD *BIO_s_socket(void)

	{

	return(&methods_sockp);

	}

EXPORT_C 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_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:

		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_PENDING:

	case BIO_CTRL_WPENDING:

		ret=0;

		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);

	}

EXPORT_C 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);

	}

EXPORT_C 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);

	}