GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/bio/bss_sock.c Lines: 58 70 82.9 %
Date: 2017-11-07 Branches: 21 37 56.8 %

Line Branch Exec Source
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/* $OpenBSD: bss_sock.c,v 1.23 2014/07/11 08:44:47 jsing Exp $ */
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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 <sys/socket.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <openssl/bio.h>
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static int sock_write(BIO *h, const char *buf, int num);
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static int sock_read(BIO *h, char *buf, int size);
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static int sock_puts(BIO *h, const char *str);
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static long sock_ctrl(BIO *h, int cmd, long arg1, void *arg2);
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static int sock_new(BIO *h);
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static int sock_free(BIO *data);
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int BIO_sock_should_retry(int s);
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static BIO_METHOD methods_sockp = {
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	.type = BIO_TYPE_SOCKET,
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	.name = "socket",
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	.bwrite = sock_write,
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	.bread = sock_read,
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	.bputs = sock_puts,
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	.ctrl = sock_ctrl,
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	.create = sock_new,
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	.destroy = sock_free
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};
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BIO_METHOD *
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BIO_s_socket(void)
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{
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	return (&methods_sockp);
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}
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BIO *
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BIO_new_socket(int fd, int close_flag)
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{
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	BIO *ret;
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	ret = BIO_new(BIO_s_socket());
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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
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sock_new(BIO *bi)
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{
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	bi->init = 0;
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	bi->num = 0;
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	bi->ptr = NULL;
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	bi->flags = 0;
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	return (1);
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}
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static int
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sock_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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			shutdown(a->num, SHUT_RDWR);
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			close(a->num);
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		}
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		a->init = 0;
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		a->flags = 0;
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	}
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	return (1);
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}
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static int
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sock_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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		errno = 0;
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		ret = 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_sock_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
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sock_write(BIO *b, const char *in, int inl)
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{
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	int ret;
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	errno = 0;
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	ret = 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_sock_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
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sock_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_C_SET_FD:
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		sock_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_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
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sock_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 = sock_write(bp, str, n);
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	return (ret);
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}
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int
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BIO_sock_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 = errno;
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		return (BIO_sock_non_fatal_error(err));
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	}
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	return (0);
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}
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int
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BIO_sock_non_fatal_error(int err)
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{
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	switch (err) {
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	case ENOTCONN:
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	case EINTR:
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	case EAGAIN:
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	case EINPROGRESS:
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	case EALREADY:
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		return (1);
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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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