50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
/*
|
|
* Copyright (C)2026 kimapr
|
|
*
|
|
* This file is part of fcnatfw.
|
|
*
|
|
* fcnatfw is free software: you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation, either version 3 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* fcnatfw is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
|
|
* Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#include <sys/socket.h>
|
|
#include <stdlib.h>
|
|
#include <dlfcn.h>
|
|
|
|
typedef int (*Ftype_socket)(int, int, int);
|
|
|
|
int socket(int domain, int type, int protocol) {
|
|
static Ftype_socket real_socket = NULL;
|
|
if (!real_socket)
|
|
real_socket = dlsym(RTLD_NEXT, "socket");
|
|
|
|
int sock = real_socket(domain, type, protocol);
|
|
if (sock < 0 || !(domain == AF_INET || domain == AF_INET6))
|
|
return sock;
|
|
|
|
int optval = 1;
|
|
setsockopt(sock, SOL_SOCKET,
|
|
#ifdef SO_REUSEPORT_LB
|
|
SO_REUSEPORT_LB
|
|
#else
|
|
#ifdef SO_REUSEPORT
|
|
SO_REUSEPORT
|
|
#else
|
|
#error SO_REUSEPORT is required for operation. Your platform is not supported
|
|
#endif
|
|
#endif
|
|
, &optval, sizeof(optval));
|
|
return sock;
|
|
}
|