1#!/bin/sh 2 3# udhcpc script edited by Tim Riker <Tim@Rikers.org> 4 5[ -z "$1" ] && echo "Error: should be called from udhcpc" && exit 1 6 7ACTION="$1" 8RESOLV_CONF="/etc/resolv.conf" 9[ -e $RESOLV_CONF ] || touch $RESOLV_CONF 10[ -n "$broadcast" ] && BROADCAST="broadcast $broadcast" 11[ -n "$subnet" ] && NETMASK="netmask $subnet" 12# Handle stateful DHCPv6 like DHCPv4 13[ -n "$ipv6" ] && ip="$ipv6/128" 14 15if [ -z "${IF_WAIT_DELAY}" ]; then 16 IF_WAIT_DELAY=10 17fi 18 19wait_for_ipv6_default_route() { 20 printf "Waiting for IPv6 default route to appear" 21 while [ $IF_WAIT_DELAY -gt 0 ]; do 22 if ip -6 route list | grep -q default; then 23 printf "\n" 24 return 25 fi 26 sleep 1 27 printf "." 28 : $((IF_WAIT_DELAY -= 1)) 29 done 30 printf " timeout!\n" 31} 32 33case "$ACTION" in 34 deconfig) 35 /sbin/ifconfig $interface up 36 /sbin/ifconfig $interface 0.0.0.0 37 38 # drop info from this interface 39 # resolv.conf may be a symlink to /tmp/, so take care 40 TMPFILE=$(mktemp) 41 grep -vE "# $interface\$" $RESOLV_CONF > $TMPFILE 42 cat $TMPFILE > $RESOLV_CONF 43 rm -f $TMPFILE 44 45 if [ -x /usr/sbin/avahi-autoipd ]; then 46 /usr/sbin/avahi-autoipd -c $interface && /usr/sbin/avahi-autoipd -k $interface 47 fi 48 ;; 49 50 leasefail|nak) 51 if [ -x /usr/sbin/avahi-autoipd ]; then 52 /usr/sbin/avahi-autoipd -c $interface || /usr/sbin/avahi-autoipd -wD $interface --no-chroot 53 fi 54 ;; 55 56 renew|bound) 57 if [ -x /usr/sbin/avahi-autoipd ]; then 58 /usr/sbin/avahi-autoipd -c $interface && /usr/sbin/avahi-autoipd -k $interface 59 fi 60 /sbin/ifconfig $interface $ip $BROADCAST $NETMASK 61 if [ -n "$ipv6" ] ; then 62 wait_for_ipv6_default_route 63 fi 64 65 # RFC3442: If the DHCP server returns both a Classless 66 # Static Routes option and a Router option, the DHCP 67 # client MUST ignore the Router option. 68 if [ -n "$staticroutes" ]; then 69 echo "deleting routers" 70 route -n | while read dest gw mask flags metric ref use iface; do 71 [ "$iface" != "$interface" -o "$gw" = "0.0.0.0" ] || \ 72 route del -net "$dest" netmask "$mask" gw "$gw" dev "$interface" 73 done 74 75 # format: dest1/mask gw1 ... destn/mask gwn 76 set -- $staticroutes 77 while [ -n "$1" -a -n "$2" ]; do 78 route add -net "$1" gw "$2" dev "$interface" 79 shift 2 80 done 81 elif [ -n "$router" ] ; then 82 echo "deleting routers" 83 while route del default gw 0.0.0.0 dev $interface 2> /dev/null; do 84 : 85 done 86 87 for i in $router ; do 88 route add default gw $i dev $interface 89 done 90 fi 91 92 # drop info from this interface 93 # resolv.conf may be a symlink to /tmp/, so take care 94 TMPFILE=$(mktemp) 95 grep -vE "# $interface\$" $RESOLV_CONF > $TMPFILE 96 cat $TMPFILE > $RESOLV_CONF 97 rm -f $TMPFILE 98 99 # prefer rfc3397 domain search list (option 119) if available 100 if [ -n "$search" ]; then 101 search_list=$search 102 elif [ -n "$domain" ]; then 103 search_list=$domain 104 fi 105 106 [ -n "$search_list" ] && 107 echo "search $search_list # $interface" >> $RESOLV_CONF 108 109 for i in $dns ; do 110 echo adding dns $i 111 echo "nameserver $i # $interface" >> $RESOLV_CONF 112 done 113 ;; 114esac 115 116HOOK_DIR="$0.d" 117for hook in "${HOOK_DIR}/"*; do 118 [ -f "${hook}" -a -x "${hook}" ] || continue 119 "${hook}" "$ACTION" 120done 121 122exit 0 123