*: more readable handling of pipe fds. No code changes.

[oweals/busybox.git] / networking / udhcp / Config.in

diff --git a/networking/udhcp/Config.in b/networking/udhcp/Config.in
index 7a3eda9cc2c35c0092e4cac996a272df76f0ca2b..ff0e4e2ae81663b1bf2fad7c91ba65d1729cb369 100644 (file)
--- a/networking/udhcp/Config.in
+++ b/networking/udhcp/Config.in
@@ -54,16 +54,22 @@ config APP_UDHCPC
 
          See http://udhcp.busybox.net for further details.
 
 
          See http://udhcp.busybox.net for further details.
 

-config FEATURE_UDHCP_SYSLOG
-       bool "Log udhcp messages to syslog"
+config FEATURE_UDHCPC_ARPING
+       bool "Ask udhcpc to verify that the offered address is free, using arpping"
+       default y
+       depends on APP_UDHCPC
+       help
+         If selected, udhcpc will use arpping to make sure the offered address
+         is really available. 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
        default n
        depends on APP_UDHCPD || APP_UDHCPC

-       select FEATURE_SYSLOG

        help
        help

-         If not daemonized, udhcpd prints its messages to stdout/stderr.
-         If this option is selected, it will also log them to syslog.
-
-         See http://udhcp.busybox.net for further details.
+         At the cost of ~300 bytes, enables -P port option.
+         This feature is typically not needed.

 
 config FEATURE_UDHCP_DEBUG
        bool "Compile udhcp with noisy debugging messages"
 
 config FEATURE_UDHCP_DEBUG
        bool "Compile udhcp with noisy debugging messages"


@@ -83,3 +89,26 @@ config FEATURE_RFC3397
        help
          If selected, both client and server will support passing of domain
          search lists via option 119, specified in RFC3397.
        help
          If selected, both client and server will support passing of domain
          search lists via option 119, specified in RFC3397.

+
+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 will 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 options 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 big.