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gerrit.nordix.org / codeaurora / busybox / 243ddcbc76d19847d9e8022dc2f6659078f5cc20 / . / networking / udhcp / Config.in
blob: 34adf35fea139b619b3fd532102d89eeffbca8f3 [file] [log] [blame]
Mike Frysinger7031f622006-05-08 03:20:50 +0000[diff] [blame]1#
2# For a description of the syntax of this configuration file,
3# see scripts/kbuild/config-language.txt.
4#
5
Denys Vlasenko4662de02009-12-11 02:21:10 +0100[diff] [blame]6config UDHCPD
Denis Vlasenkoa4a93fd2008-04-21 20:27:29 +0000[diff] [blame]7 bool "udhcp server (udhcpd)"
Mike Frysinger7031f622006-05-08 03:20:50 +0000[diff] [blame]8 default n
9 help
Denis Vlasenkoa4a93fd2008-04-21 20:27:29 +0000[diff] [blame]10 udhcpd is a DHCP server geared primarily toward embedded systems,
Mike Frysinger7031f622006-05-08 03:20:50 +0000[diff] [blame]11 while striving to be fully functional and RFC compliant.
12
Denys Vlasenko4662de02009-12-11 02:21:10 +0100[diff] [blame]13config DHCPRELAY
Denis Vlasenko736230e2006-11-20 19:40:36 +0000[diff] [blame]14 bool "dhcprelay"
15 default n
Denys Vlasenko4662de02009-12-11 02:21:10 +0100[diff] [blame]16 depends on UDHCPD
Denis Vlasenko736230e2006-11-20 19:40:36 +0000[diff] [blame]17 help
18 dhcprelay listens for dhcp requests on one or more interfaces
19 and forwards these requests to a different interface or dhcp
20 server.
21
Denys Vlasenko4662de02009-12-11 02:21:10 +0100[diff] [blame]22config DUMPLEASES
Mike Frysinger91a33902006-07-24 07:35:52 +0000[diff] [blame]23 bool "Lease display utility (dumpleases)"
24 default n
Denys Vlasenko4662de02009-12-11 02:21:10 +0100[diff] [blame]25 depends on UDHCPD
Mike Frysinger91a33902006-07-24 07:35:52 +0000[diff] [blame]26 help
27 dumpleases displays the leases written out by the udhcpd server.
28 Lease times are stored in the file by time remaining in lease, or
29 by the absolute time that it expires in seconds from epoch.
30
Denis Vlasenkoc82b5102007-07-01 17:05:57 +0000[diff] [blame]31config FEATURE_UDHCPD_WRITE_LEASES_EARLY
32 bool "Rewrite the lease file at every new acknowledge"
33 default n
Denys Vlasenko4662de02009-12-11 02:21:10 +0100[diff] [blame]34 depends on UDHCPD
Denis Vlasenkoc82b5102007-07-01 17:05:57 +0000[diff] [blame]35 help
36 If selected, udhcpd will write a new file with leases every
Denis Vlasenkoa4a93fd2008-04-21 20:27:29 +0000[diff] [blame]37 time a new lease has been accepted, thus eliminating the need
38 to send SIGUSR1 for the initial writing or updating. Any timed
Denis Vlasenkoc82b5102007-07-01 17:05:57 +0000[diff] [blame]39 rewriting remains undisturbed
40
Denis Vlasenko84da0bf2008-02-20 22:29:52 +0000[diff] [blame]41config DHCPD_LEASES_FILE
42 string "Absolute path to lease file"
43 default "/var/lib/misc/udhcpd.leases"
Denys Vlasenko4662de02009-12-11 02:21:10 +0100[diff] [blame]44 depends on UDHCPD
Denis Vlasenko84da0bf2008-02-20 22:29:52 +0000[diff] [blame]45 help
Denis Vlasenkoa4a93fd2008-04-21 20:27:29 +0000[diff] [blame]46 udhcpd stores addresses in a lease file. This is the absolute path
47 of the file. Normally it is safe to leave it untouched.
Denis Vlasenko84da0bf2008-02-20 22:29:52 +0000[diff] [blame]48
Denys Vlasenko4662de02009-12-11 02:21:10 +0100[diff] [blame]49config UDHCPC
Denis Vlasenkoa4a93fd2008-04-21 20:27:29 +0000[diff] [blame]50 bool "udhcp client (udhcpc)"
Mike Frysinger7031f622006-05-08 03:20:50 +0000[diff] [blame]51 default n
52 help
Denis Vlasenkoa4a93fd2008-04-21 20:27:29 +0000[diff] [blame]53 udhcpc is a DHCP client geared primarily toward embedded systems,
Mike Frysinger7031f622006-05-08 03:20:50 +0000[diff] [blame]54 while striving to be fully functional and RFC compliant.
55
56 The udhcp client negotiates a lease with the DHCP server and
Denis Vlasenkoa4a93fd2008-04-21 20:27:29 +0000[diff] [blame]57 runs a script when a lease is obtained or lost.
Mike Frysinger7031f622006-05-08 03:20:50 +0000[diff] [blame]58
Denis Vlasenko223bc972007-11-22 00:58:49 +0000[diff] [blame]59config FEATURE_UDHCPC_ARPING
Denis Vlasenkoa4a93fd2008-04-21 20:27:29 +0000[diff] [blame]60 bool "Verify that the offered address is free, using ARP ping"
Denis Vlasenko223bc972007-11-22 00:58:49 +0000[diff] [blame]61 default y
Denys Vlasenko4662de02009-12-11 02:21:10 +0100[diff] [blame]62 depends on UDHCPC
Denis Vlasenko223bc972007-11-22 00:58:49 +0000[diff] [blame]63 help
Denis Vlasenkoa4a93fd2008-04-21 20:27:29 +0000[diff] [blame]64 If selected, udhcpc will send ARP probes and make sure
65 the offered address is really not in use by anyone. The client
66 will DHCPDECLINE the offer if the address is in use,
67 and restart the discover process.
Denis Vlasenko223bc972007-11-22 00:58:49 +0000[diff] [blame]68
Denis Vlasenkod55fe3e2008-02-04 13:12:16 +0000[diff] [blame]69config FEATURE_UDHCP_PORT
70 bool "Enable '-P port' option for udhcpd and udhcpc"
71 default n
Denys Vlasenko4662de02009-12-11 02:21:10 +0100[diff] [blame]72 depends on UDHCPD || UDHCPC
Denis Vlasenkod55fe3e2008-02-04 13:12:16 +0000[diff] [blame]73 help
74 At the cost of ~300 bytes, enables -P port option.
75 This feature is typically not needed.
Denis Vlasenko223bc972007-11-22 00:58:49 +0000[diff] [blame]76
Denis Vlasenko35a064b2008-11-06 00:49:59 +0000[diff] [blame]77config UDHCP_DEBUG
Denys Vlasenko7a76eba2009-06-19 13:51:29 +0200[diff] [blame]78 int "Maximum verbosity level for udhcp applets (0..9)"
Denys Vlasenkoac906fa2009-06-17 11:54:52 +0200[diff] [blame]79 default 0
Denys Vlasenko7a76eba2009-06-19 13:51:29 +0200[diff] [blame]80 range 0 9
Denys Vlasenko4662de02009-12-11 02:21:10 +0100[diff] [blame]81 depends on UDHCPD || UDHCPC || DHCPRELAY
Mike Frysinger7031f622006-05-08 03:20:50 +0000[diff] [blame]82 help
Denys Vlasenkoac906fa2009-06-17 11:54:52 +0200[diff] [blame]83 Verbosity can be increased with multiple -v options.
84 This options controls how high it can be cranked up.
85
86 Bigger values result in bigger code. Levels above 1
87 are very verbose and useful for debugging only.
Denis Vlasenko50664732007-02-27 21:15:08 +0000[diff] [blame]88
Denis Vlasenko35a064b2008-11-06 00:49:59 +0000[diff] [blame]89config FEATURE_UDHCP_RFC3397
Denis Vlasenko50664732007-02-27 21:15:08 +0000[diff] [blame]90 bool "Support for RFC3397 domain search (experimental)"
91 default n
Denys Vlasenko4662de02009-12-11 02:21:10 +0100[diff] [blame]92 depends on UDHCPD || UDHCPC
Denis Vlasenko50664732007-02-27 21:15:08 +0000[diff] [blame]93 help
94 If selected, both client and server will support passing of domain
Denys Vlasenko243ddcb2010-04-03 17:34:52 +0200[diff] [blame^]95 search lists via option 119, specified in RFC 3397,
96 and SIP servers option 120, specified in RFC 3361.
Denis Vlasenko72e76042007-11-25 03:15:24 +0000[diff] [blame]97
Denis Vlasenko35a064b2008-11-06 00:49:59 +0000[diff] [blame]98config UDHCPC_DEFAULT_SCRIPT
Denis Vlasenko84da0bf2008-02-20 22:29:52 +0000[diff] [blame]99 string "Absolute path to config script"
100 default "/usr/share/udhcpc/default.script"
Denys Vlasenko4662de02009-12-11 02:21:10 +0100[diff] [blame]101 depends on UDHCPC
Denis Vlasenko84da0bf2008-02-20 22:29:52 +0000[diff] [blame]102 help
Denis Vlasenkoa4a93fd2008-04-21 20:27:29 +0000[diff] [blame]103 This script is called after udhcpc receives an answer. See
104 examples/udhcp for a working example. Normally it is safe
Denis Vlasenko84da0bf2008-02-20 22:29:52 +0000[diff] [blame]105 to leave this untouched.
106
Denis Vlasenko72e76042007-11-25 03:15:24 +0000[diff] [blame]107config UDHCPC_SLACK_FOR_BUGGY_SERVERS
108 int "DHCP options slack buffer size"
109 default 80
110 range 0 924
Denys Vlasenko4662de02009-12-11 02:21:10 +0100[diff] [blame]111 depends on UDHCPD || UDHCPC
Denis Vlasenko72e76042007-11-25 03:15:24 +0000[diff] [blame]112 help
Denis Vlasenkoa4a93fd2008-04-21 20:27:29 +0000[diff] [blame]113 Some buggy DHCP servers send DHCP offer packets with option
Denis Vlasenko72e76042007-11-25 03:15:24 +0000[diff] [blame]114 field larger than we expect (which might also be considered a
115 buffer overflow attempt). These packets are normally discarded.
116 If circumstances beyond your control force you to support such
117 servers, this may help. The upper limit (924) makes dhcpc accept
118 even 1500 byte packets (maximum-sized ethernet packets).
119
Denis Vlasenkoa4a93fd2008-04-21 20:27:29 +0000[diff] [blame]120 This option does not make dhcp[cd] emit non-standard
Denis Vlasenko72e76042007-11-25 03:15:24 +0000[diff] [blame]121 sized packets.
122
123 Known buggy DHCP servers:
124 3Com OfficeConnect Remote 812 ADSL Router:
125 seems to confuse maximum allowed UDP packet size with
126 maximum size of entire IP packet, and sends packets which are
127 28 bytes too large.
Denis Vlasenkoa4a93fd2008-04-21 20:27:29 +0000[diff] [blame]128 Seednet (ISP) VDSL: sends packets 2 bytes too large.