/* * Copyright (c) 2006 Bjorn Andersson , Erik Ekman * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include "tun.h" #include "dns.h" #define MAX(a,b) ((a)>(b)?(a):(b)) int running = 1; static void sigint(int sig) { running = 0; } static int tunnel(int tun_fd, int dns_fd) { int i; int read; fd_set fds; char buf[1024]; struct timeval tv; while (running) { tv.tv_sec = 1; tv.tv_usec = 0; FD_ZERO(&fds); FD_SET(tun_fd, &fds); FD_SET(dns_fd, &fds); i = select(MAX(tun_fd, dns_fd) + 1, &fds, NULL, NULL, &tv); if(i < 0) { if (running) { warn("select"); } return 1; } if(i == 0) { dns_ping(dns_fd); } else { if(FD_ISSET(tun_fd, &fds)) { } if(FD_ISSET(dns_fd, &fds)) { read = dns_read(dns_fd, buf, sizeof(buf)); } } } return 0; } int main() { int tun_fd; int dns_fd; tun_fd = open_tun(); dns_fd = open_dns(); signal(SIGINT, sigint); dns_set_peer("192.168.11.101"); tunnel(tun_fd, dns_fd); printf("Closing tunnel\n"); close_dns(dns_fd); close_tun(tun_fd); return 0; }