Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. |
| 4 | */ |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 5 | |
Denis Vlasenko | 5a3395b | 2006-11-18 19:51:32 +0000 | [diff] [blame] | 6 | #include "common.h" |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 7 | #include "dhcpd.h" |
Denis Vlasenko | 5a3395b | 2006-11-18 19:51:32 +0000 | [diff] [blame] | 8 | |
Denis Vlasenko | 73121c3 | 2009-02-01 00:40:45 +0000 | [diff] [blame] | 9 | #if BB_LITTLE_ENDIAN |
| 10 | static 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 Vlasenko | 9b49a5e | 2007-10-11 10:05:36 +0000 | [diff] [blame] | 20 | int dumpleases_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
Denis Vlasenko | a60f84e | 2008-07-05 09:18:54 +0000 | [diff] [blame] | 21 | int dumpleases_main(int argc UNUSED_PARAM, char **argv) |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 22 | { |
Denis Vlasenko | 5e43d85 | 2007-03-29 19:29:32 +0000 | [diff] [blame] | 23 | int fd; |
| 24 | int i; |
| 25 | unsigned opt; |
Denis Vlasenko | 73121c3 | 2009-02-01 00:40:45 +0000 | [diff] [blame] | 26 | int64_t written_at, curr, expires_abs; |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 27 | const char *file = LEASES_FILE; |
| 28 | struct dhcpOfferedAddr lease; |
| 29 | struct in_addr addr; |
| 30 | |
Denis Vlasenko | 5e43d85 | 2007-03-29 19:29:32 +0000 | [diff] [blame] | 31 | enum { |
| 32 | OPT_a = 0x1, // -a |
| 33 | OPT_r = 0x2, // -r |
| 34 | OPT_f = 0x4, // -f |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 35 | }; |
Denis Vlasenko | ba2fb71 | 2007-04-01 09:39:03 +0000 | [diff] [blame] | 36 | #if ENABLE_GETOPT_LONG |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 37 | static const char dumpleases_longopts[] ALIGN1 = |
Denis Vlasenko | bdc88fd | 2007-07-23 17:14:14 +0000 | [diff] [blame] | 38 | "absolute\0" No_argument "a" |
| 39 | "remaining\0" No_argument "r" |
| 40 | "file\0" Required_argument "f" |
Denis Vlasenko | 990d0f6 | 2007-07-24 15:54:42 +0000 | [diff] [blame] | 41 | ; |
Denis Vlasenko | ba2fb71 | 2007-04-01 09:39:03 +0000 | [diff] [blame] | 42 | |
Denis Vlasenko | bdc88fd | 2007-07-23 17:14:14 +0000 | [diff] [blame] | 43 | applet_long_options = dumpleases_longopts; |
Denis Vlasenko | 5e43d85 | 2007-03-29 19:29:32 +0000 | [diff] [blame] | 44 | #endif |
Denis Vlasenko | 0919657 | 2007-07-21 13:27:44 +0000 | [diff] [blame] | 45 | opt_complementary = "=0:a--r:r--a"; |
Denis Vlasenko | fe7cd64 | 2007-08-18 15:32:12 +0000 | [diff] [blame] | 46 | opt = getopt32(argv, "arf:", &file); |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 47 | |
Denis Vlasenko | 5e43d85 | 2007-03-29 19:29:32 +0000 | [diff] [blame] | 48 | fd = xopen(file, O_RDONLY); |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 49 | |
Denis Vlasenko | bd79c3d | 2009-04-01 12:36:09 +0000 | [diff] [blame^] | 50 | 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 Vlasenko | 0416e3d | 2009-01-01 17:52:09 +0000 | [diff] [blame] | 53 | |
Denis Vlasenko | 73121c3 | 2009-02-01 00:40:45 +0000 | [diff] [blame] | 54 | if (full_read(fd, &written_at, sizeof(written_at)) != sizeof(written_at)) |
| 55 | return 0; |
| 56 | written_at = ntoh64(written_at); |
Denis Vlasenko | 0416e3d | 2009-01-01 17:52:09 +0000 | [diff] [blame] | 57 | curr = time(NULL); |
Denis Vlasenko | 73121c3 | 2009-02-01 00:40:45 +0000 | [diff] [blame] | 58 | if (curr < written_at) |
| 59 | written_at = curr; /* lease file from future! :) */ |
| 60 | |
Denis Vlasenko | 5e43d85 | 2007-03-29 19:29:32 +0000 | [diff] [blame] | 61 | while (full_read(fd, &lease, sizeof(lease)) == sizeof(lease)) { |
Denis Vlasenko | 0416e3d | 2009-01-01 17:52:09 +0000 | [diff] [blame] | 62 | const char *fmt = ":%02x" + 1; |
| 63 | for (i = 0; i < 6; i++) { |
| 64 | printf(fmt, lease.chaddr[i]); |
| 65 | fmt = ":%02x"; |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 66 | } |
| 67 | addr.s_addr = lease.yiaddr; |
Denis Vlasenko | bd79c3d | 2009-04-01 12:36:09 +0000 | [diff] [blame^] | 68 | /* 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 Vlasenko | 73121c3 | 2009-02-01 00:40:45 +0000 | [diff] [blame] | 71 | expires_abs = ntohl(lease.expires) + written_at; |
| 72 | if (expires_abs <= curr) { |
Denis Vlasenko | 0416e3d | 2009-01-01 17:52:09 +0000 | [diff] [blame] | 73 | puts("expired"); |
| 74 | continue; |
| 75 | } |
Denis Vlasenko | 5e43d85 | 2007-03-29 19:29:32 +0000 | [diff] [blame] | 76 | if (!(opt & OPT_a)) { /* no -a */ |
Denis Vlasenko | 0416e3d | 2009-01-01 17:52:09 +0000 | [diff] [blame] | 77 | unsigned d, h, m; |
Denis Vlasenko | 73121c3 | 2009-02-01 00:40:45 +0000 | [diff] [blame] | 78 | unsigned expires = expires_abs - curr; |
Denis Vlasenko | 0416e3d | 2009-01-01 17:52:09 +0000 | [diff] [blame] | 79 | 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 Vlasenko | 73121c3 | 2009-02-01 00:40:45 +0000 | [diff] [blame] | 86 | time_t t = expires_abs; |
Denis Vlasenko | 0416e3d | 2009-01-01 17:52:09 +0000 | [diff] [blame] | 87 | fputs(ctime(&t), stdout); |
| 88 | } |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 89 | } |
Denis Vlasenko | 5e43d85 | 2007-03-29 19:29:32 +0000 | [diff] [blame] | 90 | /* close(fd); */ |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 91 | |
| 92 | return 0; |
| 93 | } |