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