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