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#!/bin/bash
#
# test-dhcp
#
# Usage:
# test-dhcp IFACE [PEER_IPADDRESS [PEER_MAC]]
#
# Licensed under the GNU GPL. See /usr/share/common-licenses/GPL.
#
# History
# Jan-Aug 2003: Written by Thomas Hood <jdthood@yahoo.co.uk>
set -o errexit # -e
set -o noglob # -f
MYNAME="$(basename $0)"
# All the DHCP clients are in /sbin/ but which is under /usr/
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/share/guessnet/test
report_err() { echo "${MYNAME}: Error: $*" >&2 ; }
do_sleep() { LANG=C sleep "$@" ; }
test_peer()
{
if [ ! "$PEER_IPADDRESS" ] || test-ping "$IFACE" "-" "$PEER_IPADDRESS" ${PEER_MAC:+"$PEER_MAC"} ; then
exitstatus=0
else
exitstatus=1
fi
}
IFACE="$1"
[ "$IFACE" ] || { report_err "Interface not specified. Exiting." ; exit 1 ; }
PEER_IPADDRESS="$2"
PEER_MAC="$3"
if which dhclient > /dev/null ; then
# TODO: Write a faster proxy script for the purposes of this test
disable_resolvconf()
{
[ -x /sbin/resolvconf ] || return 0
[ -x /etc/init.d/resolvconf ] || return 0
/etc/init.d/resolvconf disable-updates
}
reenable_resolvconf()
{
[ -x /sbin/resolvconf ] || return 0
[ -x /etc/init.d/resolvconf ] || return 0
/sbin/resolvconf -d "$IFACE"
/etc/init.d/resolvconf enable-updates
}
trap reenable_resolvconf EXIT
disable_resolvconf
if dhclient -q -1 -pf "/var/run/dhclient.${IFACE}.pid" -lf "/var/run/dhclient.${IFACE}.leases" "$IFACE" >/dev/null 2>&1 ; then
test_peer
else
exitstatus=1
fi
# Don't use -r because it gives up the lease
#dhclient -q -r "$IFACE" >/dev/null 2>&1 || true
start-stop-daemon --stop --oknodo --pidfile="/var/run/dhclient.${IFACE}.pid" --retry=TERM/5/KILL/1 > /dev/null 2>&1 || true
rm -f "/var/run/dhclient.${IFACE}.pid"
reenable_resolvconf
exit "$exitstatus"
elif which pump > /dev/null ; then
if pump --interface="$IFACE" --no-dns --no-resolvconf --script="" > /dev/null 2>&1 ; then
test_peer
else
exitstatus=1
fi
pump -k --interface="$IFACE" > /dev/null 2>&1 || true
exit "$exitstatus"
elif which dhcpcd > /dev/null ; then
# Setting the proxy script to /dev/null seems to work :)
if dhcpcd -c /dev/null "$IFACE" > /dev/null 2>&1 ; then
test_peer
else
exitstatus=1
fi
dhcpcd -c /dev/null -k "$IFACE" > /dev/null 2>&1 || true
[ "$exitstatus" != "0" ] || do_sleep 1
exit "$exitstatus"
else
report_err "No DHCP client found. Exiting."
exit 1
fi
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