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
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
# DO NOT EDIT. This file is generated from Config.src
#
# For a description of the syntax of this configuration file,
# see scripts/kbuild/config-language.txt.
#
config BUSYBOX_UDHCPC6
bool "udhcp client for DHCPv6 (udhcpc6)"
default n # not yet ready
help
udhcpc6 is a DHCPv6 client
config BUSYBOX_UDHCPD
bool "udhcp server (udhcpd)"
default n
select BUSYBOX_PLATFORM_LINUX
help
udhcpd is a DHCP server geared primarily toward embedded systems,
while striving to be fully functional and RFC compliant.
config BUSYBOX_DHCPRELAY
bool "dhcprelay"
default n
help
dhcprelay listens for dhcp requests on one or more interfaces
and forwards these requests to a different interface or dhcp
server.
config BUSYBOX_DUMPLEASES
bool "Lease display utility (dumpleases)"
default n
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 BUSYBOX_FEATURE_UDHCPD_WRITE_LEASES_EARLY
bool "Rewrite the lease file at every new acknowledge"
default y
depends on BUSYBOX_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 BUSYBOX_FEATURE_UDHCPD_BASE_IP_ON_MAC
bool "Select IP address based on client MAC"
default n
depends on BUSYBOX_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 BUSYBOX_DHCPD_LEASES_FILE
string "Absolute path to lease file"
default "/var/lib/misc/udhcpd.leases"
depends on BUSYBOX_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 BUSYBOX_UDHCPC
bool "udhcp client (udhcpc)"
default y
select BUSYBOX_PLATFORM_LINUX
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 BUSYBOX_FEATURE_UDHCPC_ARPING
bool "Verify that the offered address is free, using ARP ping"
default y
depends on BUSYBOX_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 BUSYBOX_FEATURE_UDHCPC_SANITIZEOPT
bool "Do not pass malformed host and domain names"
default y
depends on BUSYBOX_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 BUSYBOX_FEATURE_UDHCP_PORT
bool "Enable '-P port' option for udhcpd and udhcpc"
default n
depends on BUSYBOX_UDHCPD || BUSYBOX_UDHCPC
help
At the cost of ~300 bytes, enables -P port option.
This feature is typically not needed.
config BUSYBOX_UDHCP_DEBUG
int "Maximum verbosity level for udhcp applets (0..9)"
default 0
range 0 9
depends on BUSYBOX_UDHCPD || BUSYBOX_UDHCPC || BUSYBOX_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 BUSYBOX_FEATURE_UDHCP_RFC3397
bool "Support for RFC3397 domain search (experimental)"
default y
depends on BUSYBOX_UDHCPD || BUSYBOX_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 BUSYBOX_FEATURE_UDHCP_8021Q
bool "Support for 802.1Q VLAN parameters"
default y
depends on BUSYBOX_UDHCPD || BUSYBOX_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.
config BUSYBOX_UDHCPC_DEFAULT_SCRIPT
string "Absolute path to config script"
default "/usr/share/udhcpc/default.script"
depends on BUSYBOX_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 BUSYBOX_UDHCPC_SLACK_FOR_BUGGY_SERVERS
int "DHCP options slack buffer size"
default 80
range 0 924
depends on BUSYBOX_UDHCPD || BUSYBOX_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.
|
