294 lines
7.1 KiB
C
294 lines
7.1 KiB
C
/* 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...
|
|
*/
|
|
#include "bio_lcl.h"
|
|
|
|
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);
|
|
|
|
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,
|
|
};
|
|
|
|
BIO_METHOD *BIO_s_fd(void)
|
|
{
|
|
return(&methods_fdp);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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);
|
|
}
|