2 # For a description of the syntax of this configuration file,
3 # see scripts/kbuild/config-language.txt.
7 bool "udhcp Server (udhcpd)"
10 uDHCPd is a DHCP server geared primarily toward embedded systems,
11 while striving to be fully functional and RFC compliant.
13 See http://udhcp.busybox.net for further details.
20 dhcprelay listens for dhcp requests on one or more interfaces
21 and forwards these requests to a different interface or dhcp
25 bool "Lease display utility (dumpleases)"
29 dumpleases displays the leases written out by the udhcpd server.
30 Lease times are stored in the file by time remaining in lease, or
31 by the absolute time that it expires in seconds from epoch.
33 See http://udhcp.busybox.net for further details.
35 config FEATURE_UDHCPD_WRITE_LEASES_EARLY
36 bool "Rewrite the lease file at every new acknowledge"
40 If selected, udhcpd will write a new file with leases every
41 time a new lease has been accepted, thus eleminating the need
42 to send SIGUSR1 for the initial writing, or updating. Any timed
43 rewriting remains undisturbed
45 config DHCPD_LEASES_FILE
46 string "Absolute path to lease file"
47 default "/var/lib/misc/udhcpd.leases"
50 The udhcpd stores address in lease files. Normaly it is save
51 to leave it untouched.
55 bool "udhcp Client (udhcpc)"
58 uDHCPc is a DHCP client geared primarily toward embedded systems,
59 while striving to be fully functional and RFC compliant.
61 The udhcp client negotiates a lease with the DHCP server and
62 notifies a set of scripts when a lease is obtained or lost.
64 See http://udhcp.busybox.net for further details.
66 config FEATURE_UDHCPC_ARPING
67 bool "Ask udhcpc to verify that the offered address is free, using arpping"
71 If selected, udhcpc will use arpping to make sure the offered address
72 is really available. The client will DHCPDECLINE the offer if the
73 address is in use, and restart the discover process.
75 config FEATURE_UDHCP_PORT
76 bool "Enable '-P port' option for udhcpd and udhcpc"
78 depends on APP_UDHCPD || APP_UDHCPC
80 At the cost of ~300 bytes, enables -P port option.
81 This feature is typically not needed.
83 config FEATURE_UDHCP_DEBUG
84 bool "Compile udhcp with noisy debugging messages"
86 depends on APP_UDHCPD || APP_UDHCPC
88 If selected, udhcpd will output extra debugging output. If using
89 this option, compile uDHCP with "-g", and do not fork the daemon to
92 See http://udhcp.busybox.net for further details.
94 config FEATURE_RFC3397
95 bool "Support for RFC3397 domain search (experimental)"
97 depends on APP_UDHCPD || APP_UDHCPC
99 If selected, both client and server will support passing of domain
100 search lists via option 119, specified in RFC3397.
102 config DHCPC_DEFAULT_SCRIPT
103 string "Absolute path to config script"
104 default "/usr/share/udhcpc/default.script"
105 depends on APP_UDHCPC
107 This script is called after udhcpc receives and answer. See
108 examples/udhcp for a working example. Normaly it is save
109 to leave this untouched.
112 config UDHCPC_SLACK_FOR_BUGGY_SERVERS
113 int "DHCP options slack buffer size"
116 depends on APP_UDHCPD || APP_UDHCPC
118 Some buggy DHCP servers will send DHCP offer packets with option
119 field larger than we expect (which might also be considered a
120 buffer overflow attempt). These packets are normally discarded.
121 If circumstances beyond your control force you to support such
122 servers, this may help. The upper limit (924) makes dhcpc accept
123 even 1500 byte packets (maximum-sized ethernet packets).
125 This options does not make dhcp[cd] emit non-standard
128 Known buggy DHCP servers:
129 3Com OfficeConnect Remote 812 ADSL Router:
130 seems to confuse maximum allowed UDP packet size with
131 maximum size of entire IP packet, and sends packets which are
133 Seednet (ISP) VDSL: sends packets 2 bytes too big.