/* 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#endifstatic 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_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);	}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 */