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