/* 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);

 	}