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
46 bool "udhcp Client (udhcpc)"
49 uDHCPc is a DHCP client geared primarily toward embedded systems,
50 while striving to be fully functional and RFC compliant.
52 The udhcp client negotiates a lease with the DHCP server and
53 notifies a set of scripts when a lease is obtained or lost.
55 See http://udhcp.busybox.net for further details.
57 config FEATURE_UDHCPC_ARPING
58 bool "Ask udhcpc to verify that the offered address is free, using arpping"
62 If selected, udhcpc will use arpping to make sure the offered address
63 is really available. The client will DHCPDECLINE the offer if the
64 address is in use, and restart the discover process.
66 config FEATURE_UDHCP_PORT
67 bool "Enable '-P port' option for udhcpd and udhcpc"
69 depends on APP_UDHCPD || APP_UDHCPC
71 At the cost of ~300 bytes, enables -P port option.
72 This feature is typically not needed.
74 config FEATURE_UDHCP_DEBUG
75 bool "Compile udhcp with noisy debugging messages"
77 depends on APP_UDHCPD || APP_UDHCPC
79 If selected, udhcpd will output extra debugging output. If using
80 this option, compile uDHCP with "-g", and do not fork the daemon to
83 See http://udhcp.busybox.net for further details.
85 config FEATURE_RFC3397
86 bool "Support for RFC3397 domain search (experimental)"
88 depends on APP_UDHCPD || APP_UDHCPC
90 If selected, both client and server will support passing of domain
91 search lists via option 119, specified in RFC3397.
93 config UDHCPC_SLACK_FOR_BUGGY_SERVERS
94 int "DHCP options slack buffer size"
97 depends on APP_UDHCPD || APP_UDHCPC
99 Some buggy DHCP servers will send DHCP offer packets with option
100 field larger than we expect (which might also be considered a
101 buffer overflow attempt). These packets are normally discarded.
102 If circumstances beyond your control force you to support such
103 servers, this may help. The upper limit (924) makes dhcpc accept
104 even 1500 byte packets (maximum-sized ethernet packets).
106 This options does not make dhcp[cd] emit non-standard
109 Known buggy DHCP servers:
110 3Com OfficeConnect Remote 812 ADSL Router:
111 seems to confuse maximum allowed UDP packet size with
112 maximum size of entire IP packet, and sends packets which are
114 Seednet (ISP) VDSL: sends packets 2 bytes too big.