1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
#
# For a description of the syntax of this configuration file,
# see scripts/kbuild/config-language.txt.
#
config APP_UDHCPD
bool "udhcp server (udhcpd)"
default n
help
udhcpd is a DHCP server geared primarily toward embedded systems,
while striving to be fully functional and RFC compliant.
config APP_DHCPRELAY
bool "dhcprelay"
default n
depends on APP_UDHCPD
help
dhcprelay listens for dhcp requests on one or more interfaces
and forwards these requests to a different interface or dhcp
server.
config APP_DUMPLEASES
bool "Lease display utility (dumpleases)"
default n
depends on APP_UDHCPD
help
dumpleases displays the leases written out by the udhcpd server.
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 FEATURE_UDHCPD_WRITE_LEASES_EARLY
bool "Rewrite the lease file at every new acknowledge"
default n
depends on APP_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 APP_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 APP_UDHCPC
bool "udhcp client (udhcpc)"
default n
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 APP_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_UDHCP_PORT
bool "Enable '-P port' option for udhcpd and udhcpc"
default n
depends on APP_UDHCPD || APP_UDHCPC
help
At the cost of ~300 bytes, enables -P port option.
This feature is typically not needed.
config UDHCP_DEBUG
int "Maximum verbosity level for udhcp applets (0..3)"
default 0
range 0 3
depends on APP_UDHCPD || APP_UDHCPC || APP_DHCPRELAY
help
Verbosity can be increased with multiple -v options.
This options 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 FEATURE_UDHCP_RFC3397
bool "Support for RFC3397 domain search (experimental)"
default n
depends on APP_UDHCPD || APP_UDHCPC
help
If selected, both client and server will support passing of domain
search lists via option 119, specified in RFC3397.
config UDHCPC_DEFAULT_SCRIPT
string "Absolute path to config script"
default "/usr/share/udhcpc/default.script"
depends on APP_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 UDHCPC_SLACK_FOR_BUGGY_SERVERS
int "DHCP options slack buffer size"
default 80
range 0 924
depends on APP_UDHCPD || APP_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 dhcpc accept
even 1500 byte packets (maximum-sized ethernet packets).
This option does not make dhcp[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.
|
