iwspy-sim.c

mobile ip 在linux下的一种实现

/* $Id: iwspy-sim.c,v 1.12 2001/07/11 15:12:44 jm Exp $
 * Dynamics iwspy simulator module
 *
 * Dynamic hierarchial IP tunnel
 * Copyright (C) 1998-2000, Dynamics group
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation. See README and COPYING for
 * more details.
 */


#include <malloc.h>
#include <unistd.h>
#include <stdio.h>
#include <getopt.h>
extern char *optarg;
extern int optind, opterr, optopt;
#include <errno.h>
#include <string.h>
#include <assert.h>
#include <limits.h>
#include <asm/types.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <linux/wireless.h>

#include "dyn_wireless.h"
#include "debug.h"
#include "util.h"

#define DEBUG_FLAG '4'

#define USAGE "iwspy_sim -d <device> [-h] {[<mac_address> "\
"<qualities_file>] .. | -m <mac_address>}\n"
#define MAX_LINE 80
#define MAX_FILES 64

extern int opt_debug;

static struct option const long_options[] =
{
	{"help", no_argument, NULL, 'h'},
	{"device", required_argument, NULL, 'd'},
	{0, 0, 0, 0}
};

int free_nodes(struct quality_values *q)
{
	struct quality_values *t;

	while (q != NULL) {
		t = q;
		q = q->next;
		free(t);
	}

	return 0;
}

/* Format of file (filetype):
     0 = no timestamp, only quality value in one line
     1 = timstamps in seconds and quality value in one line
     2 = timestamps in tens of milliseconds and qual. value in one line
*/
struct quality_values *read_quals(FILE *f, int *ival, int *filetype)
{
	struct quality_values *q, *t;
	char buf[MAX_LINE], hw[ETH_ALEN+1], addr[20];
	int ret, qual;
	unsigned long tstamp;
	

	q = t = dyn_wireless_get_quals_node(NULL);

	/* Read the interval from the first line */
	*ival = 0;
	fgets(buf, MAX_LINE, f);
	ret = sscanf(buf, "# %d %d", ival, filetype);
	if (ret != 2) {
		fprintf(stderr, "Header not found!