s_socket.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.]
*/
/* ====================================================================
* Copyright (c) 199-2015 The OpenSSL Project. All rights reserved.
*
* 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 above 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 acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED 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 OpenSSL PROJECT OR
* ITS 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.
* ====================================================================
*/
/* socket-related functions used by s_client and s_server */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
/*
* With IPv6, it looks like Digital has mixed up the proper order of
* recursive header file inclusion, resulting in the compiler complaining
* that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which is
* needed to have fileno() declared correctly... So let's define u_int
*/
#if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
# define __U_INT
typedef unsigned int u_int;
#endif
#ifndef OPENSSL_NO_SOCK
# define USE_SOCKETS
# include "apps.h"
# undef USE_SOCKETS
# include "s_apps.h"
# include <openssl/bio.h>
# include <openssl/err.h>
/*
* init_client - helper routine to set up socket communication
* @sock: pointer to storage of resulting socket.
* @host: the host name or path (for AF_UNIX) to connect to.
* @port: the port to connect to (ignored for AF_UNIX).
* @family: desired socket family, may be AF_INET, AF_INET6, AF_UNIX or
* AF_UNSPEC
* @type: socket type, must be SOCK_STREAM or SOCK_DGRAM
*
* This will create a socket and use it to connect to a host:port, or if
* family == AF_UNIX, to the path found in host.
*
* If the host has more than one address, it will try them one by one until
* a successful connection is established. The resulting socket will be
* found in *sock on success, it will be given INVALID_SOCKET otherwise.
*
* Returns 1 on success, 0 on failure.
*/
int init_client(int *sock, const char *host, const char *port,
int family, int type)
{
BIO_ADDRINFO *res = NULL;
const BIO_ADDRINFO *ai = NULL;
int ret;
if (!BIO_sock_init())
return 0;
ret = BIO_lookup(host, port, BIO_LOOKUP_CLIENT, family, type, &res);
if (ret == 0) {
ERR_print_errors(bio_err);
return 0;
}
ret = 0;
for (ai = res; ai != NULL; ai = BIO_ADDRINFO_next(ai)) {
/* Admitedly, these checks are quite paranoid, we should
not get anything in the BIO_ADDRINFO chain that we haven't
asked for */
OPENSSL_assert((family == AF_UNSPEC || family == BIO_ADDRINFO_family(res))
&& (type == 0 || type == BIO_ADDRINFO_socktype(res)));
*sock = BIO_socket(BIO_ADDRINFO_family(ai), BIO_ADDRINFO_socktype(ai),
BIO_ADDRINFO_protocol(res), 0);
if (*sock == INVALID_SOCKET) {
/* Maybe the kernel doesn't support the socket family, even if
* BIO_lookup() added it in the returned result...
*/
continue;
}
if (!BIO_connect(*sock, BIO_ADDRINFO_address(ai), 0)) {
BIO_closesocket(*sock);
*sock = INVALID_SOCKET;
continue;
}
/* Success, don't try any more addresses */
break;
}
if (*sock == INVALID_SOCKET) {
ERR_print_errors(bio_err);
} else {
ret = 1;
}
BIO_ADDRINFO_free(res);
return ret;
}
/*
* do_server - helper routine to perform a server operation
* @accept_sock: pointer to storage of resulting socket.
* @host: the host name or path (for AF_UNIX) to connect to.
* @port: the port to connect to (ignored for AF_UNIX).
* @family: desired socket family, may be AF_INET, AF_INET6, AF_UNIX or
* AF_UNSPEC
* @type: socket type, must be SOCK_STREAM or SOCK_DGRAM
* @cb: pointer to a function that receives the accepted socket and
* should perform the communication with the connecting client.
* @context: pointer to memory that's passed verbatim to the cb function.
* @naccept: number of times an incoming connect should be accepted. If -1,
* unlimited number.
*
* This will create a socket and use it to listen to a host:port, or if
* family == AF_UNIX, to the path found in host, then start accepting
* incoming connections and run cb on the resulting socket.
*
* 0 on failure, something other on success.
*/
int do_server(int *accept_sock, const char *host, const char *port,
int family, int type,
int (*cb) (const char *hostname, int s, int stype,
unsigned char *context), unsigned char *context,
int naccept)
{
int asock = 0;
int sock;
int i;
BIO_ADDRINFO *res = NULL;
int ret = 0;
if (!BIO_sock_init())
return 0;
if (!BIO_lookup(host, port, BIO_LOOKUP_SERVER, family, type, &res)) {
ERR_print_errors(bio_err);
return 0;
}
/* Admitedly, these checks are quite paranoid, we should
not get anything in the BIO_ADDRINFO chain that we haven't
asked for */
OPENSSL_assert((family == AF_UNSPEC || family == BIO_ADDRINFO_family(res))
&& (type == 0 || type == BIO_ADDRINFO_socktype(res)));
asock = BIO_socket(BIO_ADDRINFO_family(res), BIO_ADDRINFO_socktype(res),
BIO_ADDRINFO_protocol(res), 0);
if (asock == INVALID_SOCKET
|| !BIO_listen(asock, BIO_ADDRINFO_address(res), BIO_SOCK_REUSEADDR)) {
BIO_ADDRINFO_free(res);
ERR_print_errors(bio_err);
if (asock != INVALID_SOCKET)
BIO_closesocket(asock);
goto end;
}
BIO_ADDRINFO_free(res);
if (accept_sock != NULL) {
*accept_sock = asock;
}
for (;;) {
BIO_ADDR *accepted_addr = NULL;
char *name = NULL;
if (type == SOCK_STREAM) {
if ((accepted_addr = BIO_ADDR_new()) == NULL) {
BIO_closesocket(asock);
return 0;
}
redoit:
sock = BIO_accept_ex(asock, accepted_addr, 0);
if (sock < 0) {
if (BIO_sock_should_retry(ret)) {
goto redoit;
} else {
ERR_print_errors(bio_err);
BIO_ADDR_free(accepted_addr);
SHUTDOWN(asock);
break;
}
}
} else {
sock = asock;
}
/* accepted_addr is NULL if we're dealing with SOCK_DGRAM
* this means that for SOCK_DGRAM, name will be NULL
*/
if (accepted_addr != NULL) {
#ifdef AF_UNIX
if (family == AF_UNIX)
name = BIO_ADDR_path_string(accepted_addr);
else
#endif
name = BIO_ADDR_hostname_string(accepted_addr, 0);
}
i = (*cb) (name, sock, type, context);
OPENSSL_free(name);
BIO_ADDR_free(accepted_addr);
if (type == SOCK_STREAM)
SHUTDOWN2(sock);
if (naccept != -1)
naccept--;
if (i < 0 || naccept == 0) {
SHUTDOWN2(asock);
ret = i;
break;
}
}
end:
# ifdef AF_UNIX
if (family == AF_UNIX)
unlink(host);
# endif
return ret;
}
#endif /* OPENSSL_NO_SOCK */
