sl@0: /* crypto/bio/bss_fd.c */
sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * This package is an SSL implementation written
sl@0:  * by Eric Young (eay@cryptsoft.com).
sl@0:  * The implementation was written so as to conform with Netscapes SSL.
sl@0:  * 
sl@0:  * This library is free for commercial and non-commercial use as long as
sl@0:  * the following conditions are aheared to.  The following conditions
sl@0:  * apply to all code found in this distribution, be it the RC4, RSA,
sl@0:  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
sl@0:  * included with this distribution is covered by the same copyright terms
sl@0:  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
sl@0:  * 
sl@0:  * Copyright remains Eric Young's, and as such any Copyright notices in
sl@0:  * the code are not to be removed.
sl@0:  * If this package is used in a product, Eric Young should be given attribution
sl@0:  * as the author of the parts of the library used.
sl@0:  * This can be in the form of a textual message at program startup or
sl@0:  * in documentation (online or textual) provided with the package.
sl@0:  * 
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 3. All advertising materials mentioning features or use of this software
sl@0:  *    must display the following acknowledgement:
sl@0:  *    "This product includes cryptographic software written by
sl@0:  *     Eric Young (eay@cryptsoft.com)"
sl@0:  *    The word 'cryptographic' can be left out if the rouines from the library
sl@0:  *    being used are not cryptographic related :-).
sl@0:  * 4. If you include any Windows specific code (or a derivative thereof) from 
sl@0:  *    the apps directory (application code) you must include an acknowledgement:
sl@0:  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
sl@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
sl@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0:  * SUCH DAMAGE.
sl@0:  * 
sl@0:  * The licence and distribution terms for any publically available version or
sl@0:  * derivative of this code cannot be changed.  i.e. this code cannot simply be
sl@0:  * copied and put under another distribution licence
sl@0:  * [including the GNU Public Licence.]
sl@0:  */
sl@0: 
sl@0: #include <stdio.h>
sl@0: #include <errno.h>
sl@0: #define USE_SOCKETS
sl@0: #include "cryptlib.h"
sl@0: /*
sl@0:  * As for unconditional usage of "UPLINK" interface in this module.
sl@0:  * Trouble is that unlike Unix file descriptors [which are indexes
sl@0:  * in kernel-side per-process table], corresponding descriptors on
sl@0:  * platforms which require "UPLINK" interface seem to be indexes
sl@0:  * in a user-land, non-global table. Well, in fact they are indexes
sl@0:  * in stdio _iob[], and recall that _iob[] was the very reason why
sl@0:  * "UPLINK" interface was introduced in first place. But one way on
sl@0:  * another. Neither libcrypto or libssl use this BIO meaning that
sl@0:  * file descriptors can only be provided by application. Therefore
sl@0:  * "UPLINK" calls are due...
sl@0:  */
sl@0: /*
sl@0:  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.
sl@0:  */
sl@0:  
sl@0: #include "bio_lcl.h"
sl@0: #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))
sl@0: #include "libcrypto_wsd_macros.h"
sl@0: #include "libcrypto_wsd.h"
sl@0: #endif
sl@0: 
sl@0: static int fd_write(BIO *h, const char *buf, int num);
sl@0: static int fd_read(BIO *h, char *buf, int size);
sl@0: static int fd_puts(BIO *h, const char *str);
sl@0: static long fd_ctrl(BIO *h, int cmd, long arg1, void *arg2);
sl@0: static int fd_new(BIO *h);
sl@0: static int fd_free(BIO *data);
sl@0: int BIO_fd_should_retry(int s);
sl@0: #ifndef EMULATOR
sl@0: static BIO_METHOD methods_fdp=
sl@0: 	{
sl@0: 	BIO_TYPE_FD,"file descriptor",
sl@0: 	fd_write,
sl@0: 	fd_read,
sl@0: 	fd_puts,
sl@0: 	NULL, /* fd_gets, */
sl@0: 	fd_ctrl,
sl@0: 	fd_new,
sl@0: 	fd_free,
sl@0: 	NULL,
sl@0: 	};
sl@0: #else
sl@0: 
sl@0: GET_STATIC_VAR_FROM_TLS(methods_fdp,bss_fd,BIO_METHOD)
sl@0: #define methods_fdp (*GET_WSD_VAR_NAME(methods_fdp,bss_fd,s)())
sl@0: 
sl@0: const BIO_METHOD temp_s_methods_fdp=
sl@0: 	{
sl@0: 	BIO_TYPE_FD,"file descriptor",
sl@0: 	fd_write,
sl@0: 	fd_read,
sl@0: 	fd_puts,
sl@0: 	NULL, /* fd_gets, */
sl@0: 	fd_ctrl,
sl@0: 	fd_new,
sl@0: 	fd_free,
sl@0: 	NULL,
sl@0: 	};
sl@0: 
sl@0: #endif	
sl@0: 
sl@0: EXPORT_C BIO_METHOD *BIO_s_fd(void)
sl@0: 	{
sl@0: 	return(&methods_fdp);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C BIO *BIO_new_fd(int fd,int close_flag)
sl@0: 	{
sl@0: 	BIO *ret;
sl@0: 	ret=BIO_new(BIO_s_fd());
sl@0: 	if (ret == NULL) return(NULL);
sl@0: 	BIO_set_fd(ret,fd,close_flag);
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: static int fd_new(BIO *bi)
sl@0: 	{
sl@0: 	bi->init=0;
sl@0: 	bi->num=-1;
sl@0: 	bi->ptr=NULL;
sl@0: 	bi->flags=BIO_FLAGS_UPLINK; /* essentially redundant */
sl@0: 	return(1);
sl@0: 	}
sl@0: 
sl@0: static int fd_free(BIO *a)
sl@0: 	{
sl@0: 	if (a == NULL) return(0);
sl@0: 	if (a->shutdown)
sl@0: 		{
sl@0: 		if (a->init)
sl@0: 			{
sl@0: 			UP_close(a->num);
sl@0: 			}
sl@0: 		a->init=0;
sl@0: 		a->flags=BIO_FLAGS_UPLINK;
sl@0: 		}
sl@0: 	return(1);
sl@0: 	}
sl@0: 	
sl@0: static int fd_read(BIO *b, char *out,int outl)
sl@0: 	{
sl@0: 	int ret=0;
sl@0: 
sl@0: 	if (out != NULL)
sl@0: 		{
sl@0: 		clear_sys_error();
sl@0: 		ret=UP_read(b->num,out,outl);
sl@0: 		BIO_clear_retry_flags(b);
sl@0: 		if (ret <= 0)
sl@0: 			{
sl@0: 			if (BIO_fd_should_retry(ret))
sl@0: 				BIO_set_retry_read(b);
sl@0: 			}
sl@0: 		}
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: static int fd_write(BIO *b, const char *in, int inl)
sl@0: 	{
sl@0: 	int ret;
sl@0: 	clear_sys_error();
sl@0: 	ret=UP_write(b->num,in,inl);
sl@0: 	BIO_clear_retry_flags(b);
sl@0: 	if (ret <= 0)
sl@0: 		{
sl@0: 		if (BIO_fd_should_retry(ret))
sl@0: 			BIO_set_retry_write(b);
sl@0: 		}
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: static long fd_ctrl(BIO *b, int cmd, long num, void *ptr)
sl@0: 	{
sl@0: 	long ret=1;
sl@0: 	int *ip;
sl@0: 
sl@0: 	switch (cmd)
sl@0: 		{
sl@0: 	case BIO_CTRL_RESET:
sl@0: 		num=0;
sl@0: 	case BIO_C_FILE_SEEK:
sl@0: 		ret=(long)UP_lseek(b->num,num,0);
sl@0: 		break;
sl@0: 	case BIO_C_FILE_TELL:
sl@0: 	case BIO_CTRL_INFO:
sl@0: 		ret=(long)UP_lseek(b->num,0,1);
sl@0: 		break;
sl@0: 	case BIO_C_SET_FD:
sl@0: 		fd_free(b);
sl@0: 		b->num= *((int *)ptr);
sl@0: 		b->shutdown=(int)num;
sl@0: 		b->init=1;
sl@0: 		break;
sl@0: 	case BIO_C_GET_FD:
sl@0: 		if (b->init)
sl@0: 			{
sl@0: 			ip=(int *)ptr;
sl@0: 			if (ip != NULL) *ip=b->num;
sl@0: 			ret=b->num;
sl@0: 			}
sl@0: 		else
sl@0: 			ret= -1;
sl@0: 		break;
sl@0: 	case BIO_CTRL_GET_CLOSE:
sl@0: 		ret=b->shutdown;
sl@0: 		break;
sl@0: 	case BIO_CTRL_SET_CLOSE:
sl@0: 		b->shutdown=(int)num;
sl@0: 		break;
sl@0: 	case BIO_CTRL_PENDING:
sl@0: 	case BIO_CTRL_WPENDING:
sl@0: 		ret=0;
sl@0: 		break;
sl@0: 	case BIO_CTRL_DUP:
sl@0: 	case BIO_CTRL_FLUSH:
sl@0: 		ret=1;
sl@0: 		break;
sl@0: 	default:
sl@0: 		ret=0;
sl@0: 		break;
sl@0: 		}
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: static int fd_puts(BIO *bp, const char *str)
sl@0: 	{
sl@0: 	int n,ret;
sl@0: 
sl@0: 	n=strlen(str);
sl@0: 	ret=fd_write(bp,str,n);
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C int BIO_fd_should_retry(int i)
sl@0: 	{
sl@0: 	int err;
sl@0: 
sl@0: 	if ((i == 0) || (i == -1))
sl@0: 		{
sl@0: 		err=get_last_sys_error();
sl@0: 
sl@0: #if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */
sl@0: 		if ((i == -1) && (err == 0))
sl@0: 			return(1);
sl@0: #endif
sl@0: 
sl@0: 		return(BIO_fd_non_fatal_error(err));
sl@0: 		}
sl@0: 	return(0);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C int BIO_fd_non_fatal_error(int err)
sl@0: 	{
sl@0: 	switch (err)
sl@0: 		{
sl@0: 
sl@0: #ifdef EWOULDBLOCK
sl@0: # ifdef WSAEWOULDBLOCK
sl@0: #  if WSAEWOULDBLOCK != EWOULDBLOCK
sl@0: 	case EWOULDBLOCK:
sl@0: #  endif
sl@0: # else
sl@0: 	case EWOULDBLOCK:
sl@0: # endif
sl@0: #endif
sl@0: 
sl@0: #if defined(ENOTCONN)
sl@0: 	case ENOTCONN:
sl@0: #endif
sl@0: 
sl@0: #ifdef EINTR
sl@0: 	case EINTR:
sl@0: #endif
sl@0: 
sl@0: #ifdef EAGAIN
sl@0: #if EWOULDBLOCK != EAGAIN
sl@0: 	case EAGAIN:
sl@0: # endif
sl@0: #endif
sl@0: 
sl@0: #ifdef EPROTO
sl@0: 	case EPROTO:
sl@0: #endif
sl@0: 
sl@0: #ifdef EINPROGRESS
sl@0: 	case EINPROGRESS:
sl@0: #endif
sl@0: 
sl@0: #ifdef EALREADY
sl@0: 	case EALREADY:
sl@0: #endif
sl@0: 		return(1);
sl@0: 		/* break; */
sl@0: 	default:
sl@0: 		break;
sl@0: 		}
sl@0: 	return(0);
sl@0: 	}