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Using udhcpc and eth0, on 'ifup eth0' obtain an IP address via DHCP and assign it properly to eth0.
90 lines
2.8 KiB
XML
90 lines
2.8 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../../general.ent">
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%general-entities;
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]>
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<sect1 id="ch-scripts-network">
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<?dbhtml filename="network.html"?>
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<title>Configuring the network Script</title>
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<indexterm zone="ch-scripts-network">
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<primary sortas="d-network">network</primary>
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<secondary>configuring</secondary></indexterm>
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<sect2>
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<title>Creating Network Interface Configuration Files</title>
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<para>Which interfaces are brought up and down by the network utilities
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depends on the files and directories in the
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<filename class="directory">/etc/network</filename> directory. The
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<filename>interfaces</filename> file should contain a
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description of the interfaces, as done by Debian, and each of the
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directories contain scripts for actions to perform on each type of network
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event.</para>
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<para>The following command creates the required directories and the
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<filename>interfaces</filename> file, assuming DHCP will be used for
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eth0:</para>
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<screen><userinput>mkdir -pv ${CLFS}/targetfs/etc/network/if-{post-{up,down},pre-{up,down},up,down}.d
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mkdir -pv ${CLFS}/targetfs/usr/share/udhcpc
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cat > ${CLFS}/targetfs/etc/network/interfaces << "EOF"
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<literal>auto eth0
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iface eth0 inet dhcp</literal>
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EOF</userinput></screen>
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<para>For DHCP to work properly with udhcpc, the BusyBox dhcp client, a
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configuration script is needed. Create a simple script to assign the
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provided DHCP address and update <filename>/etc/resolv.conf</filename>:</para>
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<screen><userinput>cat > ${CLFS}/targetfs/usr/share/udhcpc/default.script << "EOF"
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<literal>#!/bin/sh
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# udhcpc Interface Configuration
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# Based on http://lists.debian.org/debian-boot/2002/11/msg00500.html
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# udhcpc script edited by Tim Riker <Tim@Rikers.org>
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[ -z "$1" ] && echo "Error: should be called from udhcpc" && exit 1
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RESOLV_CONF="/etc/resolv.conf"
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[ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
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[ -n "$subnet" ] && NETMASK="netmask $subnet"
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case "$1" in
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deconfig)
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/sbin/ifconfig $interface 0.0.0.0
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;;
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renew|bound)
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/sbin/ifconfig $interface $ip $BROADCAST $NETMASK
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if [ -n "$router" ] ; then
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while route del default gw 0.0.0.0 dev $interface ; do
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true
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done
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for i in $router ; do
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route add default gw $i dev $interface
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done
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fi
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echo -n > $RESOLV_CONF
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[ -n "$domain" ] && echo search $domain >> $RESOLV_CONF
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for i in $dns ; do
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echo nameserver $i >> $RESOLV_CONF
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done
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;;
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esac
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exit 0
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</literal>EOF
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chmod +x ${CLFS}/targetfs/usr/share/udhcpc/default.script</userinput></screen>
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</sect2>
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</sect1>
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