+++ /dev/null
-#!/bin/bash
-#
-# dhclient-script for Linux.
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License
-# as published by the Free Software Foundation; either version
-# 2 of the License, or (at your option) any later version.
-#
-# Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
-#
-# Probably, I did not understand, what this funny feature as "alias"
-# means exactly. For now I suppose, that it is a static address, which
-# we should install and preserve.
-#
-
-exec >> /tmp/DHS.log 2>&1
-
-echo dhc-script $* reason=$reason
-set | grep "^\(old_\|new_\|check_\)"
-
-LOG () {
- echo LOG $* ;
-}
-
-# convert 8bit mask to length
-# arg: $1 = mask
-#
-Mask8ToLen() {
- local l=0;
-
- while [ $l -le 7 ]; do
- if [ $[ ( 1 << $l ) + $1 ] -eq 256 ]; then
- return $[ 8 - $l ]
- fi
- l=$[ $l + 1 ]
- done
- return 0;
-}
-
-# convert inet dotted quad mask to length
-# arg: $1 = dotquad mask
-#
-MaskToLen() {
- local masklen=0
- local mask8=$1
-
- case $1 in
- 0.0.0.0)
- return 0;
- ;;
- 255.*.0.0)
- masklen=8
- mask8=${mask8#255.}
- mask8=${mask8%.0.0}
- ;;
- 255.255.*.0)
- masklen=16
- mask8=${mask8#255.255.}
- mask8=${mask8%.0}
- ;;
- 255.255.255.*)
- masklen=24
- mask8=${mask8#255.255.255.}
- ;;
- *)
- return 255
- ;;
- esac
- Mask8ToLen $mask8
- return $[ $? + $masklen ]
-}
-
-# calculate ABC "natural" mask
-# arg: $1 = dotquad address
-#
-ABCMask () {
- local class;
-
- class=${1%%.*}
-
- if [ "$1" = "255.255.255.255" ]; then
- echo $1
- elif [ "$1" = "0.0.0.0" ]; then
- echo $1
- elif [ $class -ge 224 ]; then
- echo 240.0.0.0
- elif [ $class -ge 192 ]; then
- echo 255.255.255.0
- elif [ $class -ge 128 ]; then
- echo 255.255.0.0
- else
- echo 255.0.0.0
- fi
-}
-
-# calculate ABC "natural" mask length
-# arg: $1 = dotquad address
-#
-ABCMaskLen () {
- local class;
-
- class=${1%%.*}
-
- if [ "$1" = "255.255.255.255" ]; then
- return 32
- elif [ "$1" = "0.0.0.0" ]; then
- return 0
- elif [ $class -ge 224 ]; then
- return 4;
- elif [ $class -ge 192 ]; then
- return 24;
- elif [ $class -ge 128 ]; then
- return 16;
- else
- return 8;
- fi
-}
-
-# Delete IP address
-# args: $1 = interface
-# $2 = address
-# $3 = mask
-# $4 = broadcast
-# $5 = label
-#
-DelINETAddr () {
- local masklen=32
- local addrid=$1
-
- LOG DelINETAddr $*
-
- if [ "$5" ]; then
- addrid=$addrid:$5
- fi
- LOG ifconfig $addrid down
- ifconfig $addrid down
-}
-
-# Add IP address
-# args: $1 = interface
-# $2 = address
-# $3 = mask
-# $4 = broadcast
-# $5 = label
-#
-AddINETAddr () {
- local mask_arg
- local brd_arg
- local addrid=$1
-
- LOG AddINETAddr $*
-
- if [ "$5" ]; then
- addrid=$addrid:$5
- fi
- if [ "$3" ]; then
- mask_arg="netmask $3"
- fi
- if [ "$4" ]; then
- brd_arg="broadcast $4"
- fi
-
- LOG ifconfig $addrid $2 $mask_arg $brd_arg up
- ifconfig $addrid $2 $mask_arg $brd_arg up
-}
-
-# Add default routes
-# args: $1 = routers list
-#
-AddDefaultRoutes() {
- local router
-
- if [ "$1" ]; then
- LOG AddDefaultRoutes $*
- for router in $1; do
- LOG route add default gw $router
- route add default gw $router
- done ;
- fi
-}
-
-# Delete default routes
-# args: $1 = routers list
-#
-DelDefaultRoutes() {
- local router
-
- if [ "$1" ]; then
- LOG DelDefaultRoutes $*
-
- for router in $1; do
- LOG route del default gw $router
- route del default gw $router
- done
- fi
-}
-
-# ping a host
-# args: $1 = dotquad address of the host
-#
-PingNode() {
- LOG PingNode $*
- if ping -q -c 1 -w 2 $1 ; then
- return 0;
- fi
- return 1;
-}
-
-# Check (and add route, if alive) default routers
-# args: $1 = routers list
-# returns: 0 if at least one router is alive.
-#
-CheckRouterList() {
- local router
- local succeed=1
-
- LOG CheckRouterList $*
-
- for router in $1; do
- if PingNode $router ; then
- succeed=0
- route add default gw $router
- fi
- done
- return $succeed
-}
-
-# Delete/create static routes.
-# args: $1 = operation (del/add)
-# $2 = routes list in format "dst1 nexthop1 dst2 ..."
-#
-# BEWARE: this feature of DHCP is obsolete, because does not
-# support subnetting.
-#
-X-StaticRouteList() {
- local op=$1
- local lst="$2"
- local masklen
-
- LOG X-StaticRouteList $*
-
- if [ "$lst" ]; then
- set $lst
- while [ $# -gt 1 ]; do
- route $op -net $1 netmask `ABCMask "$1"` gw $2
- shift; shift;
- done
- fi
-}
-
-# Create static routes.
-# arg: $1 = routes list in format "dst1 nexthop1 dst2 ..."
-#
-AddStaticRouteList() {
- LOG AddStaticRouteList $*
- X-StaticRouteList add "$1"
-}
-
-# Delete static routes.
-# arg: $1 = routes list in format "dst1 nexthop1 dst2 ..."
-#
-DelStaticRouteList() {
- LOG DelStaticRouteList $*
- X-StaticRouteList del "$1"
-}
-
-# Broadcast unsolicited ARP to update neighbours' caches.
-# args: $1 = interface
-# $2 = address
-#
-UnsolicitedARP() {
- if [ -f /sbin/arping ]; then
- /sbin/arping -A -c 1 -I "$1" "$2" &
- (sleep 2 ; /sbin/arping -U -c 1 -I "$1" "$2" ) &
- fi
-}
-
-# Duplicate address detection.
-# args: $1 = interface
-# $2 = test address
-# returns: 0, if DAD succeeded.
-DAD() {
- if [ -f /sbin/arping ]; then
- /sbin/arping -c 2 -w 3 -D -I "$1" "$2"
- return $?
- fi
- return 0
-}
-
-
-# Setup resolver.
-# args: NO
-# domain and nameserver list are passed in global variables.
-#
-# NOTE: we try to be careful and not to break user supplied resolv.conf.
-# The script mangles it, only if it has dhcp magic signature.
-#
-UpdateDNS() {
- local nameserver
- local idstring="#### Generated by DHCPCD"
-
- LOG UpdateDNS $*
-
- if [ "$new_domain_name" = "" -a "$new_domain_name_servers" = "" ]; then
- return 0;
- fi
-
- echo $idstring > /etc/resolv.conf.dhcp
- if [ "$new_domain_name" ]; then
- echo search $new_domain_name >> /etc/resolv.conf.dhcp
- fi
- echo options ndots:1 >> /etc/resolv.conf.dhcp
-
- if [ "$new_domain_name_servers" ]; then
- for nameserver in $new_domain_name_servers; do
- echo nameserver $nameserver >> /etc/resolv.conf.dhcp
- done
- else
- echo nameserver 127.0.0.1 >> /etc/resolv.conf.dhcp
- fi
-
- if [ -f /etc/resolv.conf ]; then
- if [ "`head -1 /etc/resolv.conf`" != "$idstring" ]; then
- return 0
- fi
- if [ "$old_domain_name" = "$new_domain_name" -a
- "$new_domain_name_servers" = "$old_domain_name_servers" ]; then
- return 0
- fi
- fi
- mv /etc/resolv.conf.dhcp /etc/resolv.conf
-}
-
-case $reason in
-NBI)
- exit 1
- ;;
-
-MEDIUM)
- exit 0
- ;;
-
-PREINIT)
- ifconfig $interface:dhcp down
- ifconfig $interface:dhcp1 down
- if [ -d /proc/sys/net/ipv4/conf/$interface ]; then
- ifconfig $interface:dhcp 10.10.10.10 netmask 255.255.255.255
- ifconfig $interface:dhcp down
- if [ -d /proc/sys/net/ipv4/conf/$interface ]; then
- LOG The interface $interface already configured.
- fi
- fi
- ifconfig $interface:dhcp up
- exit 0
- ;;
-
-ARPSEND)
- exit 0
- ;;
-
-ARPCHECK)
- if DAD "$interface" "$check_ip_address" ; then
- exit 0
- fi
- exit 1
- ;;
-
-BOUND|RENEW|REBIND|REBOOT)
- if [ "$old_ip_address" -a "$alias_ip_address" -a \
- "$alias_ip_address" != "$old_ip_address" ]; then
- DelINETAddr "$interface" "$alias_ip_address" "$alias_subnet_mask" "$alias_broadcast_address" dhcp1
- fi
- if [ "$old_ip_address" -a "$old_ip_address" != "$new_ip_address" ]; then
- DelINETAddr "$interface" "$old_ip_address" "$old_subnet_mask" "$old_broadcast_address" dhcp
- DelDefaultRoutes "$old_routers"
- DelStaticRouteList "$old_static_routes"
- fi
- if [ "$old_ip_address" = "" -o "$old_ip_address" != "$new_ip_address" -o \
- "$reason" = "BOUND" -o "$reason" = "REBOOT" ]; then
- AddINETAddr "$interface" "$new_ip_address" "$new_subnet_mask" "$new_broadcast_address" dhcp
- AddStaticRouteList "$new_static_routes"
- AddDefaultRoutes "$new_routers"
- UnsolicitedARP "$interface" "$new_ip_address"
- fi
- if [ "$new_ip_address" != "$alias_ip_address" -a "$alias_ip_address" ]; then
- AddINETAddr "$interface" "$alias_ip_address" "$alias_subnet_mask" "$alias_broadcast_address" dhcp1
- fi
- UpdateDNS
- exit 0
- ;;
-
-EXPIRE|FAIL)
- if [ "$alias_ip_address" ]; then
- DelINETAddr "$interface" "$alias_ip_address" "$alias_subnet_mask" "$alias_broadcast_address" dhcp1
- fi
- if [ "$old_ip_address" ]; then
- DelINETAddr "$interface" "$old_ip_address" "$old_subnet_mask" "$old_broadcast_address" dhcp
- DelDefaultRoutes "$old_routers"
- DelStaticRouteList "$old_static_routes"
- fi
- if [ "$alias_ip_address" ]; then
- AddINETAddr "$interface" "$alias_ip_address" "$alias_subnet_mask" "$alias_broadcast_address" dhcp1
- fi
- exit 0
- ;;
-
-TIMEOUT)
- if [ "$alias_ip_address" ]; then
- DelINETAddr "$interface" "$alias_ip_address" "$alias_subnet_mask" "$alias_broadcast_address" dhcp1
- fi
-# Seems, <null address> means, that no more old leases found.
-# Or does it mean bug in dhcpcd? 8) Fail for now.
- if [ "$new_ip_address" = "<null address>" ]; then
- if [ "$old_ip_address" ]; then
- DelINETAddr "$interface" "$old_ip_address" "$old_subnet_mask" "$old_broadcast_address" dhcp
- fi
- if [ "$alias_ip_address" ]; then
- AddINETAddr "$interface" "$alias_ip_address" "$alias_subnet_mask" "$alias_broadcast_address" dhcp1
- fi
- exit 1
- fi
- if DAD "$interface" "$new_ip_address" ; then
- AddINETAddr "$interface" "$new_ip_address" "$new_subnet_mask" "$new_broadcast_address" dhcp
- UnsolicitedARP "$interface" "$new_ip_address"
- if [ "$alias_ip_address" -a "$alias_ip_address" != "$new_ip_address" ]; then
- AddINETAddr "$interface" "$alias_ip_address" "$alias_subnet_mask" "$alias_broadcast_address" dhcp1
- UnsolicitedARP "$interface" "$alias_ip_address"
- fi
- if CheckRouterList "$new_routers" ; then
- AddStaticRouteList "$new_static_routes"
- UpdateDNS
- exit 0
- fi
- fi
- DelINETAddr "$interface" "$new_ip_address" "$new_subnet_mask" "$new_broadcast_address" dhcp
- DelDefaultRoutes "$old_routers"
- DelStaticRouteList "$old_static_routes"
- if [ "$alias_ip_address" ]; then
- AddINETAddr "$interface" "$alias_ip_address" "$alias_subnet_mask" "$alias_broadcast_address" dhcp1
- fi
- exit 1
- ;;
-esac
-
-exit 0
git://git.onelab.eu / iproute2.git / blobdiff