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/* vi: set sw=4 ts=4: */
/*
Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/wait.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdio.h>
#include <sys/socket.h>
#include <unistd.h>
#include <getopt.h>
#include <time.h>
#include "dhcpd.h"
#include "leases.h"
#include "libbb_udhcp.h"
#define REMAINING 0
#define ABSOLUTE 1
#ifndef IN_BUSYBOX
static void ATTRIBUTE_NORETURN show_usage(void)
{
printf(
"Usage: dumpleases -f <file> -[r|a]\n\n"
" -f, --file=FILENAME Leases file to load\n"
" -r, --remaining Interepret lease times as time remaing\n"
" -a, --absolute Interepret lease times as expire time\n");
exit(0);
}
#else
#define show_usage bb_show_usage
#endif
#ifdef IN_BUSYBOX
int dumpleases_main(int argc, char *argv[])
#else
int main(int argc, char *argv[])
#endif
{
FILE *fp;
int i, c, mode = REMAINING;
long expires;
const char *file = LEASES_FILE;
struct dhcpOfferedAddr lease;
struct in_addr addr;
static const struct option options[] = {
{"absolute", 0, 0, 'a'},
{"remaining", 0, 0, 'r'},
{"file", 1, 0, 'f'},
{0, 0, 0, 0}
};
while (1) {
int option_index = 0;
c = getopt_long(argc, argv, "arf:", options, &option_index);
if (c == -1) break;
switch (c) {
case 'a': mode = ABSOLUTE; break;
case 'r': mode = REMAINING; break;
case 'f':
file = optarg;
break;
default:
show_usage();
}
}
fp = xfopen(file, "r");
printf("Mac Address IP-Address Expires %s\n", mode == REMAINING ? "in" : "at");
/* "00:00:00:00:00:00 255.255.255.255 Wed Jun 30 21:49:08 1993" */
while (fread(&lease, sizeof(lease), 1, fp)) {
for (i = 0; i < 6; i++) {
printf("%02x", lease.chaddr[i]);
if (i != 5) printf(":");
}
addr.s_addr = lease.yiaddr;
printf(" %-15s", inet_ntoa(addr));
expires = ntohl(lease.expires);
printf(" ");
if (mode == REMAINING) {
if (!expires) printf("expired\n");
else {
if (expires > 60*60*24) {
printf("%ld days, ", expires / (60*60*24));
expires %= 60*60*24;
}
if (expires > 60*60) {
printf("%ld hours, ", expires / (60*60));
expires %= 60*60;
}
if (expires > 60) {
printf("%ld minutes, ", expires / 60);
expires %= 60;
}
printf("%ld seconds\n", expires);
}
} else printf("%s", ctime(&expires));
}
fclose(fp);
return 0;
}
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