/* crypto/bio/bss_fd.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"

/*

 * As for unconditional usage of "UPLINK" interface in this module.

 * Trouble is that unlike Unix file descriptors [which are indexes

 * in kernel-side per-process table], corresponding descriptors on

 * platforms which require "UPLINK" interface seem to be indexes

 * in a user-land, non-global table. Well, in fact they are indexes

 * in stdio _iob[], and recall that _iob[] was the very reason why

 * "UPLINK" interface was introduced in first place. But one way on

 * another. Neither libcrypto or libssl use this BIO meaning that

 * file descriptors can only be provided by application. Therefore

 * "UPLINK" calls are due...

 */

/*

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

 */

#include "bio_lcl.h"

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

#include "libcrypto_wsd_macros.h"

#include "libcrypto_wsd.h"

#endif

static int fd_write(BIO *h, const char *buf, int num);

static int fd_read(BIO *h, char *buf, int size);

static int fd_puts(BIO *h, const char *str);

static long fd_ctrl(BIO *h, int cmd, long arg1, void *arg2);

static int fd_new(BIO *h);

static int fd_free(BIO *data);

int BIO_fd_should_retry(int s);

#ifndef EMULATOR

static BIO_METHOD methods_fdp=

	{

	BIO_TYPE_FD,"file descriptor",

	fd_write,

	fd_read,

	fd_puts,

	NULL, /* fd_gets, */

	fd_ctrl,

	fd_new,

	fd_free,

	NULL,

	};

#else

GET_STATIC_VAR_FROM_TLS(methods_fdp,bss_fd,BIO_METHOD)

#define methods_fdp (*GET_WSD_VAR_NAME(methods_fdp,bss_fd,s)())

const BIO_METHOD temp_s_methods_fdp=

	{

	BIO_TYPE_FD,"file descriptor",

	fd_write,

	fd_read,

	fd_puts,

	NULL, /* fd_gets, */

	fd_ctrl,

	fd_new,

	fd_free,

	NULL,

	};

#endif	

EXPORT_C BIO_METHOD *BIO_s_fd(void)

	{

	return(&methods_fdp);

	}

EXPORT_C BIO *BIO_new_fd(int fd,int close_flag)

	{

	BIO *ret;

	ret=BIO_new(BIO_s_fd());

	if (ret == NULL) return(NULL);

	BIO_set_fd(ret,fd,close_flag);

	return(ret);

	}

static int fd_new(BIO *bi)

	{

	bi->init=0;

	bi->num=-1;

	bi->ptr=NULL;

	bi->flags=BIO_FLAGS_UPLINK; /* essentially redundant */

	return(1);

	}

static int fd_free(BIO *a)

	{

	if (a == NULL) return(0);

	if (a->shutdown)

		{

		if (a->init)

			{

			UP_close(a->num);

			}

		a->init=0;

		a->flags=BIO_FLAGS_UPLINK;

		}

	return(1);

	}

static int fd_read(BIO *b, char *out,int outl)

	{

	int ret=0;

	if (out != NULL)

		{

		clear_sys_error();

		ret=UP_read(b->num,out,outl);

		BIO_clear_retry_flags(b);

		if (ret <= 0)

			{

			if (BIO_fd_should_retry(ret))

				BIO_set_retry_read(b);

			}

		}

	return(ret);

	}

static int fd_write(BIO *b, const char *in, int inl)

	{

	int ret;

	clear_sys_error();

	ret=UP_write(b->num,in,inl);

	BIO_clear_retry_flags(b);

	if (ret <= 0)

		{

		if (BIO_fd_should_retry(ret))

			BIO_set_retry_write(b);

		}

	return(ret);

	}

static long fd_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=(long)UP_lseek(b->num,num,0);

		break;

	case BIO_C_FILE_TELL:

	case BIO_CTRL_INFO:

		ret=(long)UP_lseek(b->num,0,1);

		break;

	case BIO_C_SET_FD:

		fd_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 fd_puts(BIO *bp, const char *str)

	{

	int n,ret;

	n=strlen(str);

	ret=fd_write(bp,str,n);

	return(ret);

	}

EXPORT_C int BIO_fd_should_retry(int i)

	{

	int err;

	if ((i == 0) || (i == -1))

		{

		err=get_last_sys_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_fd_non_fatal_error(err));

		}

	return(0);

	}

EXPORT_C int BIO_fd_non_fatal_error(int err)

	{

	switch (err)

		{

#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);

	}