bss_fd.c
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- /* 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);
- }