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/* Load the real underlying functions for withsctp and related scripts.
*
* Copyright 2003 La Monte HP Yarroll <piggy@acm.org>
*
* 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. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include "sctp_socket.h"
int (*real_bind)(int sockfd, const struct sockaddr *my_addr, socklen_t addrlen);
int (*real_socket)(int domain, int type, int protocol);
int (*real_setsockopt)(int s, int level, int optname, const void *optval,
socklen_t optlen);
static void *lib_handle = NULL;
void
_sctp_load_libs(void)
{
if (NULL != lib_handle) return; /* Only init once. */
if (!(lib_handle = dlopen("libc.so", RTLD_LAZY))) {
if (!(lib_handle = dlopen("libc.so.6", RTLD_LAZY))) {
fprintf(stderr, "error loading libc!\n");
exit (1);
}
}
if (!(real_socket = dlsym(lib_handle, "socket"))) {
fprintf(stderr, "socket() not found in libc!\n");
exit (1);
}
if (!(real_bind = dlsym(lib_handle, "bind"))) {
fprintf(stderr, "bind() not found in libc!\n");
exit (1);
}
if (!(real_setsockopt = dlsym(lib_handle, "setsockopt"))) {
fprintf(stderr, "setsockopt() not found in libc!\n");
exit (1);
}
}
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