179 lines
5.4 KiB
Plaintext
179 lines
5.4 KiB
Plaintext
#
|
|
# For a description of the syntax of this configuration file,
|
|
# see docs/Kconfig-language.txt.
|
|
#
|
|
|
|
config UDHCPD
|
|
bool "udhcpd (21 kb)"
|
|
default y
|
|
help
|
|
udhcpd is a DHCP server geared primarily toward embedded systems,
|
|
while striving to be fully functional and RFC compliant.
|
|
|
|
config FEATURE_UDHCPD_BASE_IP_ON_MAC
|
|
bool "Select IP address based on client MAC"
|
|
default n
|
|
depends on UDHCPD
|
|
help
|
|
If selected, udhcpd will base its selection of IP address to offer
|
|
on the client's hardware address. Otherwise udhcpd uses the next
|
|
consecutive free address.
|
|
|
|
This reduces the frequency of IP address changes for clients
|
|
which let their lease expire, and makes consecutive DHCPOFFERS
|
|
for the same client to (almost always) contain the same
|
|
IP address.
|
|
|
|
config FEATURE_UDHCPD_WRITE_LEASES_EARLY
|
|
bool "Rewrite lease file at every new acknowledge"
|
|
default y
|
|
depends on UDHCPD
|
|
help
|
|
If selected, udhcpd will write a new file with leases every
|
|
time a new lease has been accepted, thus eliminating the need
|
|
to send SIGUSR1 for the initial writing or updating. Any timed
|
|
rewriting remains undisturbed.
|
|
|
|
config DHCPD_LEASES_FILE
|
|
string "Absolute path to lease file"
|
|
default "/var/lib/misc/udhcpd.leases"
|
|
depends on UDHCPD
|
|
help
|
|
udhcpd stores addresses in a lease file. This is the absolute path
|
|
of the file. Normally it is safe to leave it untouched.
|
|
|
|
config DUMPLEASES
|
|
bool "dumpleases (5.1 kb)"
|
|
default y
|
|
help
|
|
dumpleases displays the leases written out by the udhcpd.
|
|
Lease times are stored in the file by time remaining in lease, or
|
|
by the absolute time that it expires in seconds from epoch.
|
|
|
|
config DHCPRELAY
|
|
bool "dhcprelay (5.2 kb)"
|
|
default y
|
|
help
|
|
dhcprelay listens for DHCP requests on one or more interfaces
|
|
and forwards these requests to a different interface or DHCP
|
|
server.
|
|
|
|
config UDHCPC
|
|
bool "udhcpc (24 kb)"
|
|
default y
|
|
help
|
|
udhcpc is a DHCP client geared primarily toward embedded systems,
|
|
while striving to be fully functional and RFC compliant.
|
|
|
|
The udhcp client negotiates a lease with the DHCP server and
|
|
runs a script when a lease is obtained or lost.
|
|
|
|
config FEATURE_UDHCPC_ARPING
|
|
bool "Verify that the offered address is free, using ARP ping"
|
|
default y
|
|
depends on UDHCPC
|
|
help
|
|
If selected, udhcpc will send ARP probes and make sure
|
|
the offered address is really not in use by anyone. The client
|
|
will DHCPDECLINE the offer if the address is in use,
|
|
and restart the discover process.
|
|
|
|
config FEATURE_UDHCPC_SANITIZEOPT
|
|
bool "Do not pass malformed host and domain names"
|
|
default y
|
|
depends on UDHCPC
|
|
help
|
|
If selected, udhcpc will check some options (such as option 12 -
|
|
hostname) and if they don't look like valid hostnames
|
|
(for example, if they start with dash or contain spaces),
|
|
they will be replaced with string "bad" when exporting
|
|
to the environment.
|
|
|
|
config UDHCPC_DEFAULT_SCRIPT
|
|
string "Absolute path to config script"
|
|
default "/usr/share/udhcpc/default.script"
|
|
depends on UDHCPC
|
|
help
|
|
This script is called after udhcpc receives an answer. See
|
|
examples/udhcp for a working example. Normally it is safe
|
|
to leave this untouched.
|
|
|
|
config UDHCPC6_DEFAULT_SCRIPT
|
|
string "Absolute path to config script for IPv6"
|
|
default "/usr/share/udhcpc/default6.script"
|
|
depends on UDHCPC6
|
|
|
|
# udhcpc6 config is inserted here:
|
|
INSERT
|
|
|
|
comment "Common options for DHCP applets"
|
|
depends on UDHCPD || UDHCPC || UDHCPC6 || DHCPRELAY
|
|
|
|
config UDHCPC_DEFAULT_INTERFACE
|
|
string "Default interface name"
|
|
default "eth0"
|
|
depends on UDHCPC || UDHCPC6
|
|
help
|
|
The interface that will be used if no other interface is
|
|
specified on the commandline.
|
|
|
|
config FEATURE_UDHCP_PORT
|
|
bool "Enable '-P port' option for udhcpd and udhcpc"
|
|
default n
|
|
depends on UDHCPD || UDHCPC || UDHCPC6
|
|
help
|
|
At the cost of ~300 bytes, enables -P port option.
|
|
This feature is typically not needed.
|
|
|
|
config UDHCP_DEBUG
|
|
int "Maximum verbosity level (0..9)"
|
|
default 2
|
|
range 0 9
|
|
depends on UDHCPD || UDHCPC || UDHCPC6 || DHCPRELAY
|
|
help
|
|
Verbosity can be increased with multiple -v options.
|
|
This option controls how high it can be cranked up.
|
|
|
|
Bigger values result in bigger code. Levels above 1
|
|
are very verbose and useful for debugging only.
|
|
|
|
config UDHCPC_SLACK_FOR_BUGGY_SERVERS
|
|
int "DHCP options slack buffer size"
|
|
default 80
|
|
range 0 924
|
|
depends on UDHCPD || UDHCPC
|
|
help
|
|
Some buggy DHCP servers send DHCP offer packets with option
|
|
field larger than we expect (which might also be considered a
|
|
buffer overflow attempt). These packets are normally discarded.
|
|
If circumstances beyond your control force you to support such
|
|
servers, this may help. The upper limit (924) makes udhcpc accept
|
|
even 1500 byte packets (maximum-sized ethernet packets).
|
|
|
|
This option does not make udhcp[cd] emit non-standard
|
|
sized packets.
|
|
|
|
Known buggy DHCP servers:
|
|
3Com OfficeConnect Remote 812 ADSL Router:
|
|
seems to confuse maximum allowed UDP packet size with
|
|
maximum size of entire IP packet, and sends packets
|
|
which are 28 bytes too large.
|
|
Seednet (ISP) VDSL: sends packets 2 bytes too large.
|
|
|
|
config FEATURE_UDHCP_RFC3397
|
|
bool "Support RFC 3397 domain search options"
|
|
default y
|
|
depends on UDHCPD || UDHCPC
|
|
help
|
|
If selected, both client and server will support passing of domain
|
|
search lists via option 119, specified in RFC 3397,
|
|
and SIP servers option 120, specified in RFC 3361.
|
|
|
|
config FEATURE_UDHCP_8021Q
|
|
bool "Support 802.1Q VLAN parameters options"
|
|
default y
|
|
depends on UDHCPD || UDHCPC
|
|
help
|
|
If selected, both client and server will support passing of VLAN
|
|
ID and priority via options 132 and 133 as per 802.1Q.
|