addr.c

SinFP是一种新的识别对方计算机操作系统类型的工具

/*
 * addr.c
 *
 * Copyright (c) 2001 Dug Song <[e-mail]>
 *
 * $Id: addr.c,v 1.3 2002/03/29 06:07:08 dugsong Exp $
 */

#include "config.h"

#include <sys/types.h>

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "dnet.h"
#include "mod.h"

void
addr_usage(void)
{
	fprintf(stderr, "Usage: dnet addr <address> ...\n");
	exit(1);
}

int
addr_main(int argc, char *argv[])
{
	struct addr addr;
	int c, len;
	
	if (argc == 1 || *(argv[1]) == '-')
		addr_usage();
	
	for (c = 1; c < argc; c++) {
		if (addr_aton(argv[c], &addr) < 0)
			addr_usage();
		
		len = addr.addr_bits / 8;
		
		if (write(STDOUT_FILENO, addr.addr_data8, len) != len)
			err(1, "write");
	}
	exit(0);
}

struct mod mod_addr = {
	"addr",
	MOD_TYPE_DATA,
	addr_main
};