blob: 5b98aa5fef7d887d2959d5a780fdd684abc8f29b [file] [log] [blame]
Mike Frysinger7031f622006-05-08 03:20:50 +00001/* vi: set sw=4 ts=4: */
2/*
3 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
4 */
Mike Frysinger7031f622006-05-08 03:20:50 +00005
Denis Vlasenko5a3395b2006-11-18 19:51:32 +00006#include "common.h"
Mike Frysinger7031f622006-05-08 03:20:50 +00007#include "dhcpd.h"
Denis Vlasenko5a3395b2006-11-18 19:51:32 +00008
Denis Vlasenko73121c32009-02-01 00:40:45 +00009#if BB_LITTLE_ENDIAN
10static inline uint64_t hton64(uint64_t v)
11{
12 return (((uint64_t)htonl(v)) << 32) | htonl(v >> 32);
13}
14#else
15#define hton64(v) (v)
16#endif
17#define ntoh64(v) hton64(v)
18
19
Denis Vlasenko9b49a5e2007-10-11 10:05:36 +000020int dumpleases_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +000021int dumpleases_main(int argc UNUSED_PARAM, char **argv)
Mike Frysinger7031f622006-05-08 03:20:50 +000022{
Denis Vlasenko5e43d852007-03-29 19:29:32 +000023 int fd;
24 int i;
25 unsigned opt;
Denis Vlasenko73121c32009-02-01 00:40:45 +000026 int64_t written_at, curr, expires_abs;
Mike Frysinger7031f622006-05-08 03:20:50 +000027 const char *file = LEASES_FILE;
28 struct dhcpOfferedAddr lease;
29 struct in_addr addr;
30
Denis Vlasenko5e43d852007-03-29 19:29:32 +000031 enum {
32 OPT_a = 0x1, // -a
33 OPT_r = 0x2, // -r
34 OPT_f = 0x4, // -f
Mike Frysinger7031f622006-05-08 03:20:50 +000035 };
Denis Vlasenkoba2fb712007-04-01 09:39:03 +000036#if ENABLE_GETOPT_LONG
Denis Vlasenko6ca409e2007-08-12 20:58:27 +000037 static const char dumpleases_longopts[] ALIGN1 =
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +000038 "absolute\0" No_argument "a"
39 "remaining\0" No_argument "r"
40 "file\0" Required_argument "f"
Denis Vlasenko990d0f62007-07-24 15:54:42 +000041 ;
Denis Vlasenkoba2fb712007-04-01 09:39:03 +000042
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +000043 applet_long_options = dumpleases_longopts;
Denis Vlasenko5e43d852007-03-29 19:29:32 +000044#endif
Denis Vlasenko09196572007-07-21 13:27:44 +000045 opt_complementary = "=0:a--r:r--a";
Denis Vlasenkofe7cd642007-08-18 15:32:12 +000046 opt = getopt32(argv, "arf:", &file);
Mike Frysinger7031f622006-05-08 03:20:50 +000047
Denis Vlasenko5e43d852007-03-29 19:29:32 +000048 fd = xopen(file, O_RDONLY);
Mike Frysinger7031f622006-05-08 03:20:50 +000049
Denis Vlasenkobd79c3d2009-04-01 12:36:09 +000050 printf("Mac Address IP Address Host Name Expires %s\n", (opt & OPT_a) ? "at" : "in");
51 /* "00:00:00:00:00:00 255.255.255.255 ABCDEFGHIJKLMNOPQRS Wed Jun 30 21:49:08 1993" */
52 /* "123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 */
Denis Vlasenko0416e3d2009-01-01 17:52:09 +000053
Denis Vlasenko73121c32009-02-01 00:40:45 +000054 if (full_read(fd, &written_at, sizeof(written_at)) != sizeof(written_at))
55 return 0;
56 written_at = ntoh64(written_at);
Denis Vlasenko0416e3d2009-01-01 17:52:09 +000057 curr = time(NULL);
Denis Vlasenko73121c32009-02-01 00:40:45 +000058 if (curr < written_at)
59 written_at = curr; /* lease file from future! :) */
60
Denis Vlasenko5e43d852007-03-29 19:29:32 +000061 while (full_read(fd, &lease, sizeof(lease)) == sizeof(lease)) {
Denis Vlasenko0416e3d2009-01-01 17:52:09 +000062 const char *fmt = ":%02x" + 1;
63 for (i = 0; i < 6; i++) {
Denys Vlasenko1d924f52009-06-16 10:23:01 +020064 printf(fmt, lease.lease_mac16[i]);
Denis Vlasenko0416e3d2009-01-01 17:52:09 +000065 fmt = ":%02x";
Mike Frysinger7031f622006-05-08 03:20:50 +000066 }
Denys Vlasenko1d924f52009-06-16 10:23:01 +020067 addr.s_addr = lease.lease_nip;
Denis Vlasenkobd79c3d2009-04-01 12:36:09 +000068 /* actually, 15+1 and 19+1, +1 is a space between columns */
69 /* lease.hostname is char[20] and is always NUL terminated */
70 printf(" %-16s%-20s", inet_ntoa(addr), lease.hostname);
Denis Vlasenko73121c32009-02-01 00:40:45 +000071 expires_abs = ntohl(lease.expires) + written_at;
72 if (expires_abs <= curr) {
Denis Vlasenko0416e3d2009-01-01 17:52:09 +000073 puts("expired");
74 continue;
75 }
Denis Vlasenko5e43d852007-03-29 19:29:32 +000076 if (!(opt & OPT_a)) { /* no -a */
Denis Vlasenko0416e3d2009-01-01 17:52:09 +000077 unsigned d, h, m;
Denis Vlasenko73121c32009-02-01 00:40:45 +000078 unsigned expires = expires_abs - curr;
Denis Vlasenko0416e3d2009-01-01 17:52:09 +000079 d = expires / (24*60*60); expires %= (24*60*60);
80 h = expires / (60*60); expires %= (60*60);
81 m = expires / 60; expires %= 60;
82 if (d)
83 printf("%u days ", d);
84 printf("%02u:%02u:%02u\n", h, m, (unsigned)expires);
85 } else { /* -a */
Denis Vlasenko73121c32009-02-01 00:40:45 +000086 time_t t = expires_abs;
Denis Vlasenko0416e3d2009-01-01 17:52:09 +000087 fputs(ctime(&t), stdout);
88 }
Mike Frysinger7031f622006-05-08 03:20:50 +000089 }
Denis Vlasenko5e43d852007-03-29 19:29:32 +000090 /* close(fd); */
Mike Frysinger7031f622006-05-08 03:20:50 +000091
92 return 0;
93}