2d458a2d7c
udhcpc6 implements "stateful" DHCPv6 for explicitly requesting an address and other configuration information. A major difference between DHCPv4 and DHCPv6 is that DHCPv6 does *not* advertise a default route; this is determined by normal IPv6 autoconfiguration. Add logic to wait up to IF_WAIT_DELAY seconds for the IPv6 route to be configured; as above this doesn't come from DHCPv6 but rather the IPv6 Router Advertisement (RA) which happens independently from udhcpc6. The intent here is to try and ensure that the interface is route-able upon the script's completion as it would be if called from udhcpc. Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
106 lines
2.3 KiB
Bash
Executable file
106 lines
2.3 KiB
Bash
Executable file
#!/bin/sh
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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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[ -e $RESOLV_CONF ] || touch $RESOLV_CONF
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[ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
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[ -n "$subnet" ] && NETMASK="netmask $subnet"
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# Handle stateful DHCPv6 like DHCPv4
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[ -n "$ipv6" ] && ip="$ipv6/128"
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if [ -z "${IF_WAIT_DELAY}" ]; then
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IF_WAIT_DELAY=10
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fi
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wait_for_ipv6_default_route() {
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printf "Waiting for IPv6 default route to appear"
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while [ $IF_WAIT_DELAY -gt 0 ]; do
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if [ -z "$(ip -6 route list | grep default)" ]; then
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printf "\n"
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return
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fi
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sleep 1
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printf "."
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: $((IF_WAIT_DELAY -= 1))
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done
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printf " timeout!\n"
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}
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case "$1" in
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deconfig)
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/sbin/ifconfig $interface up
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/sbin/ifconfig $interface 0.0.0.0
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# drop info from this interface
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# resolv.conf may be a symlink to /tmp/, so take care
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TMPFILE=$(mktemp)
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grep -vE "# $interface\$" $RESOLV_CONF > $TMPFILE
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cat $TMPFILE > $RESOLV_CONF
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rm -f $TMPFILE
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if [ -x /usr/sbin/avahi-autoipd ]; then
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/usr/sbin/avahi-autoipd -k $interface
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fi
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;;
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leasefail|nak)
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if [ -x /usr/sbin/avahi-autoipd ]; then
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/usr/sbin/avahi-autoipd -wD $interface --no-chroot
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fi
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;;
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renew|bound)
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if [ -x /usr/sbin/avahi-autoipd ]; then
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/usr/sbin/avahi-autoipd -k $interface
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fi
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/sbin/ifconfig $interface $ip $BROADCAST $NETMASK
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if [ -n "$ipv6" ] ; then
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wait_for_ipv6_default_route
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fi
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if [ -n "$router" ] ; then
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echo "deleting routers"
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while route del default gw 0.0.0.0 dev $interface 2> /dev/null; do
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:
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done
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for i in $router ; do
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route add default gw $i dev $interface
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done
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fi
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# drop info from this interface
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# resolv.conf may be a symlink to /tmp/, so take care
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TMPFILE=$(mktemp)
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grep -vE "# $interface\$" $RESOLV_CONF > $TMPFILE
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cat $TMPFILE > $RESOLV_CONF
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rm -f $TMPFILE
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# prefer rfc3397 domain search list (option 119) if available
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if [ -n "$search" ]; then
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search_list=$search
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elif [ -n "$domain" ]; then
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search_list=$domain
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fi
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[ -n "$search_list" ] &&
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echo "search $search_list # $interface" >> $RESOLV_CONF
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for i in $dns ; do
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echo adding dns $i
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echo "nameserver $i # $interface" >> $RESOLV_CONF
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done
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;;
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esac
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HOOK_DIR="$0.d"
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for hook in "${HOOK_DIR}/"*; do
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[ -f "${hook}" -a -x "${hook}" ] || continue
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"${hook}" "${@}"
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done
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exit 0
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