main.c

Adhoc无线网络路由协议源码

/*
 * Copyright (C) 2002, YONGGUANG ZHANG (HRL LABS)
 */

#include <stdio.h>
#include <stdlib.h>
#include <search.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <linux/netfilter.h>
#include <linux/if_tun.h>
#include <signal.h>
#include <assert.h>
#include <fcntl.h>
#include <net/route.h>
#include <time.h>

#define BUFSIZE 2048
#define TUN_DEV_IP "127.0.0.2"	/* ip address for the tun device */

/* demo main function */
main()
{
	int fi, fo;

	fi = tun_init();
	fo = rawsock_init();
	if (!fi || !fo) {
		exit(1);
	}
	printf("ready!\n");
	for (;;) {
		u_char buf[BUFSIZE];
		char cmd[64];
		int len;

		len = tun_in(fi, buf);

		sleep(2);
		sprintf(cmd, "route del %d.%d.%d.%d",
			buf[16],buf[17],buf[18],buf[19]);
		fprintf(stderr, "%s\n", cmd);
		system(cmd);
		system("route add -host 10.0.0.12 gw 10.0.0.49 dev eth1");
		sleep(2);

		// test output from this host
		rawsock_out(fo, buf,len);

		// test output from a different host (forwarding)
		// flip the source addr yet maintain the checksum
		{ u_char x = buf[15]; buf[15]=buf[13]; buf[13]=x; }

		rawsock_out(fo, buf,len);
	}
}