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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 <getopt.h>
#include "common.h"
#include "dhcpd.h"
#define REMAINING 0
#define ABSOLUTE 1
int dumpleases_main(int argc, char *argv[]);
int dumpleases_main(int argc, char *argv[])
{
int fp;
int i, c, mode = REMAINING;
unsigned 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:
bb_show_usage();
}
}
fp = xopen(file, O_RDONLY);
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 (full_read(fp, &lease, sizeof(lease)) == sizeof(lease)) {
printf(":%02x"+1, lease.chaddr[0]);
for (i = 1; i < 6; i++) {
printf(":%02x", lease.chaddr[i]);
}
addr.s_addr = lease.yiaddr;
printf(" %-15s ", inet_ntoa(addr));
expires = ntohl(lease.expires);
if (mode == REMAINING) {
if (!expires)
printf("expired\n");
else {
unsigned d, h, m;
d = expires / (24*60*60); expires %= (24*60*60);
h = expires / (60*60); expires %= (60*60);
m = expires / 60; expires %= 60;
if (d) printf("%u days ", d);
printf("%02u:%02u:%02u\n", h, m, (unsigned)expires);
}
} else fputs(ctime(&expires), stdout);
}
/* close(fp); */
return 0;
}
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