Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
Denys Vlasenko | 0ef64bd | 2010-08-16 20:14:46 +0200 | [diff] [blame] | 3 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 4 | */ |
Denys Vlasenko | dbbc3f2 | 2017-08-07 23:30:22 +0200 | [diff] [blame] | 5 | //applet:IF_DUMPLEASES(APPLET_NOEXEC(dumpleases, dumpleases, BB_DIR_USR_BIN, BB_SUID_DROP, dumpleases)) |
Denys Vlasenko | f7683cd | 2016-11-23 18:54:59 +0100 | [diff] [blame] | 6 | |
| 7 | //kbuild:lib-$(CONFIG_DUMPLEASES) += dumpleases.o |
Pere Orga | 5bc8c00 | 2011-04-11 03:29:49 +0200 | [diff] [blame] | 8 | |
| 9 | //usage:#define dumpleases_trivial_usage |
Isaac Dunham | d320a1e | 2015-10-24 20:28:04 +0200 | [diff] [blame] | 10 | //usage: "[-r|-a] [-d] [-f LEASEFILE]" |
Pere Orga | 5bc8c00 | 2011-04-11 03:29:49 +0200 | [diff] [blame] | 11 | //usage:#define dumpleases_full_usage "\n\n" |
| 12 | //usage: "Display DHCP leases granted by udhcpd\n" |
Pere Orga | 5bc8c00 | 2011-04-11 03:29:49 +0200 | [diff] [blame] | 13 | //usage: IF_LONG_OPTS( |
Denys Vlasenko | bbc7bee | 2017-01-21 02:49:58 +0100 | [diff] [blame] | 14 | //usage: "\n -f,--file FILE Lease file" |
Pere Orga | 5bc8c00 | 2011-04-11 03:29:49 +0200 | [diff] [blame] | 15 | //usage: "\n -r,--remaining Show remaining time" |
| 16 | //usage: "\n -a,--absolute Show expiration time" |
Isaac Dunham | d320a1e | 2015-10-24 20:28:04 +0200 | [diff] [blame] | 17 | //usage: "\n -d,--decimal Show time in seconds" |
Pere Orga | 5bc8c00 | 2011-04-11 03:29:49 +0200 | [diff] [blame] | 18 | //usage: ) |
| 19 | //usage: IF_NOT_LONG_OPTS( |
| 20 | //usage: "\n -f FILE Lease file" |
| 21 | //usage: "\n -r Show remaining time" |
| 22 | //usage: "\n -a Show expiration time" |
Isaac Dunham | d320a1e | 2015-10-24 20:28:04 +0200 | [diff] [blame] | 23 | //usage: "\n -d Show time in seconds" |
Pere Orga | 5bc8c00 | 2011-04-11 03:29:49 +0200 | [diff] [blame] | 24 | //usage: ) |
| 25 | |
Denis Vlasenko | 5a3395b | 2006-11-18 19:51:32 +0000 | [diff] [blame] | 26 | #include "common.h" |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 27 | #include "dhcpd.h" |
Tomas Heinrich | 85bb843 | 2009-11-05 08:42:47 +0100 | [diff] [blame] | 28 | #include "unicode.h" |
Denis Vlasenko | 5a3395b | 2006-11-18 19:51:32 +0000 | [diff] [blame] | 29 | |
Denis Vlasenko | 9b49a5e | 2007-10-11 10:05:36 +0000 | [diff] [blame] | 30 | int dumpleases_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
Denis Vlasenko | a60f84e | 2008-07-05 09:18:54 +0000 | [diff] [blame] | 31 | int dumpleases_main(int argc UNUSED_PARAM, char **argv) |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 32 | { |
Denis Vlasenko | 5e43d85 | 2007-03-29 19:29:32 +0000 | [diff] [blame] | 33 | int fd; |
| 34 | int i; |
| 35 | unsigned opt; |
Isaac Dunham | d320a1e | 2015-10-24 20:28:04 +0200 | [diff] [blame] | 36 | int64_t written_at, curr; |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 37 | const char *file = LEASES_FILE; |
Denys Vlasenko | 31af3d5 | 2009-06-17 11:57:09 +0200 | [diff] [blame] | 38 | struct dyn_lease lease; |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 39 | |
Denis Vlasenko | 5e43d85 | 2007-03-29 19:29:32 +0000 | [diff] [blame] | 40 | enum { |
Denys Vlasenko | e4dcba1 | 2010-10-28 18:57:19 +0200 | [diff] [blame] | 41 | OPT_a = 0x1, // -a |
| 42 | OPT_r = 0x2, // -r |
| 43 | OPT_f = 0x4, // -f |
Isaac Dunham | d320a1e | 2015-10-24 20:28:04 +0200 | [diff] [blame] | 44 | OPT_d = 0x8, // -d |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 45 | }; |
Denys Vlasenko | f3b92d3 | 2009-06-19 12:10:38 +0200 | [diff] [blame] | 46 | #if ENABLE_LONG_OPTS |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 47 | static const char dumpleases_longopts[] ALIGN1 = |
Denis Vlasenko | bdc88fd | 2007-07-23 17:14:14 +0000 | [diff] [blame] | 48 | "absolute\0" No_argument "a" |
| 49 | "remaining\0" No_argument "r" |
| 50 | "file\0" Required_argument "f" |
Isaac Dunham | d320a1e | 2015-10-24 20:28:04 +0200 | [diff] [blame] | 51 | "decimal\0" No_argument "d" |
Denis Vlasenko | 990d0f6 | 2007-07-24 15:54:42 +0000 | [diff] [blame] | 52 | ; |
Denis Vlasenko | ba2fb71 | 2007-04-01 09:39:03 +0000 | [diff] [blame] | 53 | |
Denis Vlasenko | 5e43d85 | 2007-03-29 19:29:32 +0000 | [diff] [blame] | 54 | #endif |
Denys Vlasenko | 2805502 | 2010-01-04 20:49:58 +0100 | [diff] [blame] | 55 | init_unicode(); |
Tomas Heinrich | 85bb843 | 2009-11-05 08:42:47 +0100 | [diff] [blame] | 56 | |
Denys Vlasenko | 22542ec | 2017-08-08 21:55:02 +0200 | [diff] [blame] | 57 | opt = getopt32long(argv, "^" |
| 58 | "arf:d" |
| 59 | "\0" "=0:a--r:r--a", |
| 60 | dumpleases_longopts, |
| 61 | &file |
| 62 | ); |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 63 | |
Denis Vlasenko | 5e43d85 | 2007-03-29 19:29:32 +0000 | [diff] [blame] | 64 | fd = xopen(file, O_RDONLY); |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 65 | |
Denis Vlasenko | bd79c3d | 2009-04-01 12:36:09 +0000 | [diff] [blame] | 66 | /* "123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 */ |
Denys Vlasenko | f98705a | 2015-10-24 20:45:10 +0200 | [diff] [blame] | 67 | /* "00:00:00:00:00:00 255.255.255.255 ABCDEFGHIJKLMNOPQRS Wed Jun 30 21:49:08 1993" */ |
| 68 | printf("Mac %-14s" "IP %-13s" "Host %-15s" "Expires %s\n", |
| 69 | "Address", "Address", "Name", |
| 70 | (opt & OPT_a) ? "at" : "in" |
| 71 | ); |
Denis Vlasenko | 0416e3d | 2009-01-01 17:52:09 +0000 | [diff] [blame] | 72 | |
Denys Vlasenko | 385b456 | 2010-03-26 10:09:34 +0100 | [diff] [blame] | 73 | xread(fd, &written_at, sizeof(written_at)); |
Denys Vlasenko | 9ff50b8 | 2010-10-18 11:40:26 +0200 | [diff] [blame] | 74 | written_at = SWAP_BE64(written_at); |
Denis Vlasenko | 0416e3d | 2009-01-01 17:52:09 +0000 | [diff] [blame] | 75 | curr = time(NULL); |
Denis Vlasenko | 73121c3 | 2009-02-01 00:40:45 +0000 | [diff] [blame] | 76 | if (curr < written_at) |
| 77 | written_at = curr; /* lease file from future! :) */ |
| 78 | |
Denis Vlasenko | 5e43d85 | 2007-03-29 19:29:32 +0000 | [diff] [blame] | 79 | while (full_read(fd, &lease, sizeof(lease)) == sizeof(lease)) { |
Isaac Dunham | d320a1e | 2015-10-24 20:28:04 +0200 | [diff] [blame] | 80 | struct in_addr addr; |
| 81 | int64_t expires_abs; |
| 82 | |
Denis Vlasenko | 0416e3d | 2009-01-01 17:52:09 +0000 | [diff] [blame] | 83 | const char *fmt = ":%02x" + 1; |
| 84 | for (i = 0; i < 6; i++) { |
Denys Vlasenko | 31af3d5 | 2009-06-17 11:57:09 +0200 | [diff] [blame] | 85 | printf(fmt, lease.lease_mac[i]); |
Denis Vlasenko | 0416e3d | 2009-01-01 17:52:09 +0000 | [diff] [blame] | 86 | fmt = ":%02x"; |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 87 | } |
Denys Vlasenko | 1d924f5 | 2009-06-16 10:23:01 +0200 | [diff] [blame] | 88 | addr.s_addr = lease.lease_nip; |
Denys Vlasenko | 19158a8 | 2010-03-26 14:06:56 +0100 | [diff] [blame] | 89 | #if ENABLE_UNICODE_SUPPORT |
Denys Vlasenko | e17764c | 2010-01-30 23:16:21 +0100 | [diff] [blame] | 90 | { |
Denys Vlasenko | dc7e5c4 | 2011-01-11 13:08:28 +0100 | [diff] [blame] | 91 | char *uni_name = unicode_conv_to_printable_fixedwidth(/*NULL,*/ lease.hostname, 19); |
Denys Vlasenko | 385b456 | 2010-03-26 10:09:34 +0100 | [diff] [blame] | 92 | printf(" %-16s%s ", inet_ntoa(addr), uni_name); |
Denys Vlasenko | e17764c | 2010-01-30 23:16:21 +0100 | [diff] [blame] | 93 | free(uni_name); |
| 94 | } |
Tomas Heinrich | 85bb843 | 2009-11-05 08:42:47 +0100 | [diff] [blame] | 95 | #else |
Denys Vlasenko | 385b456 | 2010-03-26 10:09:34 +0100 | [diff] [blame] | 96 | /* actually, 15+1 and 19+1, +1 is a space between columns */ |
| 97 | /* lease.hostname is char[20] and is always NUL terminated */ |
Denis Vlasenko | bd79c3d | 2009-04-01 12:36:09 +0000 | [diff] [blame] | 98 | printf(" %-16s%-20s", inet_ntoa(addr), lease.hostname); |
Tomas Heinrich | 85bb843 | 2009-11-05 08:42:47 +0100 | [diff] [blame] | 99 | #endif |
Denis Vlasenko | 73121c3 | 2009-02-01 00:40:45 +0000 | [diff] [blame] | 100 | expires_abs = ntohl(lease.expires) + written_at; |
| 101 | if (expires_abs <= curr) { |
Denis Vlasenko | 0416e3d | 2009-01-01 17:52:09 +0000 | [diff] [blame] | 102 | puts("expired"); |
| 103 | continue; |
| 104 | } |
Isaac Dunham | d320a1e | 2015-10-24 20:28:04 +0200 | [diff] [blame] | 105 | if (opt & OPT_d) { |
| 106 | /* -d: decimal time */ |
| 107 | if (!(opt & OPT_a)) |
| 108 | expires_abs -= curr; |
| 109 | printf("%llu\n", (unsigned long long) expires_abs); |
| 110 | continue; |
| 111 | } |
Denis Vlasenko | 5e43d85 | 2007-03-29 19:29:32 +0000 | [diff] [blame] | 112 | if (!(opt & OPT_a)) { /* no -a */ |
Denis Vlasenko | 0416e3d | 2009-01-01 17:52:09 +0000 | [diff] [blame] | 113 | unsigned d, h, m; |
Denis Vlasenko | 73121c3 | 2009-02-01 00:40:45 +0000 | [diff] [blame] | 114 | unsigned expires = expires_abs - curr; |
Denis Vlasenko | 0416e3d | 2009-01-01 17:52:09 +0000 | [diff] [blame] | 115 | d = expires / (24*60*60); expires %= (24*60*60); |
| 116 | h = expires / (60*60); expires %= (60*60); |
| 117 | m = expires / 60; expires %= 60; |
| 118 | if (d) |
| 119 | printf("%u days ", d); |
| 120 | printf("%02u:%02u:%02u\n", h, m, (unsigned)expires); |
| 121 | } else { /* -a */ |
Denis Vlasenko | 73121c3 | 2009-02-01 00:40:45 +0000 | [diff] [blame] | 122 | time_t t = expires_abs; |
Denis Vlasenko | 0416e3d | 2009-01-01 17:52:09 +0000 | [diff] [blame] | 123 | fputs(ctime(&t), stdout); |
| 124 | } |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 125 | } |
Denis Vlasenko | 5e43d85 | 2007-03-29 19:29:32 +0000 | [diff] [blame] | 126 | /* close(fd); */ |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 127 | |
| 128 | return 0; |
| 129 | } |