mirror of
https://github.com/openssl/openssl.git
synced 2024-12-09 05:51:54 +08:00
d94c444bcd
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
322 lines
12 KiB
C
322 lines
12 KiB
C
/* 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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/* ====================================================================
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* Copyright (c) 199-2015 The OpenSSL Project. All rights reserved.
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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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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*/
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/* socket-related functions used by s_client and s_server */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <signal.h>
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/*
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* With IPv6, it looks like Digital has mixed up the proper order of
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* recursive header file inclusion, resulting in the compiler complaining
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* that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which is
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* needed to have fileno() declared correctly... So let's define u_int
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*/
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#if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
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# define __U_INT
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typedef unsigned int u_int;
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#endif
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#ifndef OPENSSL_NO_SOCK
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# define USE_SOCKETS
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# include "apps.h"
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# undef USE_SOCKETS
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# include "s_apps.h"
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# include <openssl/bio.h>
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# include <openssl/err.h>
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/*
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* init_client - helper routine to set up socket communication
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* @sock: pointer to storage of resulting socket.
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* @host: the host name or path (for AF_UNIX) to connect to.
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* @port: the port to connect to (ignored for AF_UNIX).
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* @family: desired socket family, may be AF_INET, AF_INET6, AF_UNIX or
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* AF_UNSPEC
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* @type: socket type, must be SOCK_STREAM or SOCK_DGRAM
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*
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* This will create a socket and use it to connect to a host:port, or if
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* family == AF_UNIX, to the path found in host.
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*
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* If the host has more than one address, it will try them one by one until
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* a successful connection is established. The resulting socket will be
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* found in *sock on success, it will be given INVALID_SOCKET otherwise.
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*
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* Returns 1 on success, 0 on failure.
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*/
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int init_client(int *sock, const char *host, const char *port,
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int family, int type)
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{
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BIO_ADDRINFO *res = NULL;
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const BIO_ADDRINFO *ai = NULL;
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int ret;
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if (!BIO_sock_init())
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return 0;
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ret = BIO_lookup(host, port, BIO_LOOKUP_CLIENT, family, type, &res);
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if (ret == 0) {
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ERR_print_errors(bio_err);
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return 0;
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}
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ret = 0;
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for (ai = res; ai != NULL; ai = BIO_ADDRINFO_next(ai)) {
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/* Admitedly, these checks are quite paranoid, we should
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not get anything in the BIO_ADDRINFO chain that we haven't
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asked for */
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OPENSSL_assert((family == AF_UNSPEC || family == BIO_ADDRINFO_family(res))
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&& (type == 0 || type == BIO_ADDRINFO_socktype(res)));
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*sock = BIO_socket(BIO_ADDRINFO_family(ai), BIO_ADDRINFO_socktype(ai),
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BIO_ADDRINFO_protocol(res), 0);
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if (*sock == INVALID_SOCKET) {
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/* Maybe the kernel doesn't support the socket family, even if
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* BIO_lookup() added it in the returned result...
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*/
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continue;
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}
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if (!BIO_connect(*sock, BIO_ADDRINFO_address(ai), 0)) {
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BIO_closesocket(*sock);
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*sock = INVALID_SOCKET;
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continue;
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}
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/* Success, don't try any more addresses */
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break;
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}
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if (*sock == INVALID_SOCKET) {
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ERR_print_errors(bio_err);
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} else {
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ret = 1;
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}
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BIO_ADDRINFO_free(res);
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return ret;
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}
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/*
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* do_server - helper routine to perform a server operation
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* @accept_sock: pointer to storage of resulting socket.
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* @host: the host name or path (for AF_UNIX) to connect to.
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* @port: the port to connect to (ignored for AF_UNIX).
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* @family: desired socket family, may be AF_INET, AF_INET6, AF_UNIX or
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* AF_UNSPEC
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* @type: socket type, must be SOCK_STREAM or SOCK_DGRAM
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* @cb: pointer to a function that receives the accepted socket and
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* should perform the communication with the connecting client.
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* @context: pointer to memory that's passed verbatim to the cb function.
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* @naccept: number of times an incoming connect should be accepted. If -1,
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* unlimited number.
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*
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* This will create a socket and use it to listen to a host:port, or if
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* family == AF_UNIX, to the path found in host, then start accepting
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* incoming connections and run cb on the resulting socket.
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*
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* 0 on failure, something other on success.
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*/
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int do_server(int *accept_sock, const char *host, const char *port,
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int family, int type,
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int (*cb) (const char *hostname, int s, int stype,
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unsigned char *context), unsigned char *context,
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int naccept)
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{
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int asock = 0;
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int sock;
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int i;
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BIO_ADDRINFO *res = NULL;
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int ret = 0;
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if (!BIO_sock_init())
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return 0;
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if (!BIO_lookup(host, port, BIO_LOOKUP_SERVER, family, type, &res)) {
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ERR_print_errors(bio_err);
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return 0;
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}
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/* Admitedly, these checks are quite paranoid, we should
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not get anything in the BIO_ADDRINFO chain that we haven't
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asked for */
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OPENSSL_assert((family == AF_UNSPEC || family == BIO_ADDRINFO_family(res))
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&& (type == 0 || type == BIO_ADDRINFO_socktype(res)));
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asock = BIO_socket(BIO_ADDRINFO_family(res), BIO_ADDRINFO_socktype(res),
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BIO_ADDRINFO_protocol(res), 0);
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if (asock == INVALID_SOCKET
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|| !BIO_listen(asock, BIO_ADDRINFO_address(res), BIO_SOCK_REUSEADDR)) {
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BIO_ADDRINFO_free(res);
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ERR_print_errors(bio_err);
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if (asock != INVALID_SOCKET)
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BIO_closesocket(asock);
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goto end;
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}
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BIO_ADDRINFO_free(res);
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if (accept_sock != NULL) {
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*accept_sock = asock;
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}
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for (;;) {
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BIO_ADDR *accepted_addr = NULL;
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char *name = NULL;
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if (type == SOCK_STREAM) {
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if ((accepted_addr = BIO_ADDR_new()) == NULL) {
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BIO_closesocket(asock);
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return 0;
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}
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redoit:
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sock = BIO_accept_ex(asock, accepted_addr, 0);
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if (sock < 0) {
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if (BIO_sock_should_retry(ret)) {
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goto redoit;
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} else {
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ERR_print_errors(bio_err);
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BIO_ADDR_free(accepted_addr);
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SHUTDOWN(asock);
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break;
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}
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}
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} else {
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sock = asock;
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}
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/* accepted_addr is NULL if we're dealing with SOCK_DGRAM
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* this means that for SOCK_DGRAM, name will be NULL
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*/
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if (accepted_addr != NULL) {
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#ifdef AF_UNIX
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if (family == AF_UNIX)
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name = BIO_ADDR_path_string(accepted_addr);
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else
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#endif
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name = BIO_ADDR_hostname_string(accepted_addr, 0);
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}
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i = (*cb) (name, sock, type, context);
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OPENSSL_free(name);
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BIO_ADDR_free(accepted_addr);
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if (type == SOCK_STREAM)
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SHUTDOWN2(sock);
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if (naccept != -1)
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naccept--;
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if (i < 0 || naccept == 0) {
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SHUTDOWN2(asock);
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ret = i;
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break;
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}
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}
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end:
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# ifdef AF_UNIX
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if (family == AF_UNIX)
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unlink(host);
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# endif
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return ret;
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}
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#endif /* OPENSSL_NO_SOCK */
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