1#include <fcntl.h>
2#include <string.h>
3#include <stdlib.h>
4#include <stdio.h>
5#include <sys/wait.h>
6#include <sys/stat.h>
7#include <arpa/inet.h>
8#include <netdb.h>
9#include <netinet/in.h>
10#include <stdio.h>
11#include <sys/types.h>
12#include <sys/socket.h>
13#include <unistd.h>
14#include <syslog.h>
15#include <signal.h>
16#include <errno.h>
17#include <getopt.h>
18#include <time.h>
19
20#include "libbb_udhcp.h"
21
22#define REMAINING 0
23#define ABSOLUTE 1
24
25struct lease_t {
26	unsigned char chaddr[16];
27	u_int32_t yiaddr;
28	u_int32_t expires;
29	char hostname[64];
30};
31
32#ifdef BB_VER
33int dumpleases_main(int argc, char *argv[])
34#else
35int main(int argc, char *argv[])
36#endif
37{
38	FILE *fp;
39	int i, c, mode = REMAINING;
40	long expires;
41	char file[255] = "/var/lib/misc/udhcpd.leases";
42	struct lease_t lease;
43	struct in_addr addr;
44
45	static struct option options[] = {
46		{"absolute", 0, 0, 'a'},
47		{"remaining", 0, 0, 'r'},
48		{"file", 1, 0, 'f'},
49		{"help", 0, 0, 'h'},
50		{0, 0, 0, 0}
51	};
52
53	while (1) {
54		int option_index = 0;
55		c = getopt_long(argc, argv, "arf:h", options, &option_index);
56		if (c == -1) break;
57
58		switch (c) {
59		case 'a': mode = ABSOLUTE; break;
60		case 'r': mode = REMAINING; break;
61		case 'f':
62			strncpy(file, optarg, 255);
63			file[254] = '\0';
64			break;
65		case 'h':
66			printf("Usage: dumpleases -f <file> -[r|a]\n\n");
67			printf("  -f, --file=FILENAME             Leases file to load\n");
68			printf("  -r, --remaining                 Interepret lease times as time remaing\n");
69			printf("  -a, --absolute                  Interepret lease times as expire time\n");
70			break;
71		}
72	}
73
74	if (!(fp = fopen(file, "r"))) {
75		perror("could not open input file");
76		return 0;
77	}
78
79	printf("Hostname         Mac Address       IP-Address      Expires %s\n", mode == REMAINING ? "in" : "at");
80	/*     "0123456789abcdef 00:00:00:00:00:00 255.255.255.255 Wed Jun 30 21:49:08 1993" */
81	while (fread(&lease, sizeof(lease), 1, fp)) {
82
83		printf("%-16s ", lease.hostname);
84		for (i = 0; i < 6; i++) {
85			printf("%02x", lease.chaddr[i]);
86			if (i != 5) printf(":");
87		}
88		addr.s_addr = lease.yiaddr;
89		printf(" %-15s", inet_ntoa(addr));
90		expires = ntohl(lease.expires);
91		printf(" ");
92		if (mode == REMAINING) {
93			if (!expires) printf("expired\n");
94			else {
95				if (expires > 60*60*24) {
96					printf("%ld days, ", expires / (60*60*24));
97					expires %= 60*60*24;
98				}
99				if (expires > 60*60) {
100					printf("%ld hours, ", expires / (60*60));
101					expires %= 60*60;
102				}
103				if (expires > 60) {
104					printf("%ld minutes, ", expires / 60);
105					expires %= 60;
106				}
107				printf("%ld seconds\n", expires);
108			}
109		} else printf("%s", ctime(&expires));
110	}
111	fclose(fp);
112
113	return 0;
114}
115