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# Copyright (c) 2004-2006 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# Contributed by Roy Marples (uberlord@gentoo.org)
# Fix any potential localisation problems
# Note that LC_ALL trumps LC_anything_else according to locale(7)
udhcpc() {
LC_ALL=C /sbin/udhcpc "$@"
}
# void udhcpc_depend(void)
#
# Sets up the dependancies for the module
udhcpc_depend() {
after interface
provide dhcp
functions interface_exists interface_get_address
}
# void udhcpc_expose(void)
#
# Expose variables that can be configured
udhcpc_expose() {
variables udhcpc dhcp
}
# bool udhcpc_check_installed(void)
#
# Returns 1 if udhcpc is installed, otherwise 0
udhcpc_check_installed() {
[[ -x /sbin/udhcpc ]] && return 0
${1:-false} && eerror "For DHCP (udhcpc) support, emerge net-misc/udhcp"
return 1
}
# bool udhcpc_stop(char *iface)
#
# Stops udhcpc running on an interface
# Return 1 if we fail to stop udhcpc (if it's running) otherwise 0
udhcpc_stop() {
local iface="$1" pidfile="/var/run/udhcpc-$1.pid" d=
[[ ! -f ${pidfile} ]] && return 0
ebegin "Stopping udhcpc on ${iface}"
local pid=$(<"${pidfile}") e=true
local ifvar=$(bash_variable "${iface}")
d="dhcp_${ifvar}"
[[ -z ${!d} ]] && d="dhcp"
if [[ " ${!d} " == *" release "* ]]; then
kill -s USR2 "${pid}" &>/dev/null
[[ -f "/var/cache/udhcpc-${iface}.lease" ]] \
&& rm "/var/cache/udhcpc-${iface}.lease"
fi
start-stop-daemon --stop --exec /sbin/udhcpc --pidfile "${pidfile}"
eend $? || return 1
[[ -e /var/run/udhcpc-"${iface}".conf ]] \
&& rm -f /var/run/udhcpc-"${iface}".conf
return 0
}
# bool udhcpc_start(char *iface)
#
# Start DHCP on an interface by calling udhcpc $iface $options
#
# Returns 0 (true) when a DHCP address is obtained, otherwise 1
udhcpc_start() {
local iface="$1" opts= pidfile="/var/run/udhcpc-$1.pid"
local cachefile="/var/cache/udhcpc-$1.lease" d
interface_exists "${iface}" true || return 1
local ifvar=$(bash_variable "${iface}" ) opts=
opts="udhcpc_${ifvar} ${udhcpc}"
opts="${!opts}"
d="dhcp_${ifvar}"
[[ -z ${!d} ]] && d="dhcp"
if [[ " ${!d} " != *" nosendhost "* ]]; then
if [[ " ${opts} " != *" -"[hH]" "* && " ${opts} " != *" --hostname="* ]] ; then
local hname=$(hostname)
[[ -n ${hname} && ${hname} != "(none)" && ${hname} != "localhost" ]] \
&& opts="${opts} --hostname=${hname}"
fi
fi
# Setup options for the udhcpc script
# This requires a specfic Gentoo patch to udhcp which will not be
# accepted upstream.
if [[ " ${!d} " == *" nogateway "* ]] ; then
opts="${opts} --env PEER_ROUTERS=no"
else
opts="${opts} --env PEER_ROUTERS=yes"
fi
if [[ " ${!d} " == *" nodns "* ]] ; then
opts="${opts} --env PEER_DNS=no"
else
opts="${opts} --env PEER_DNS=yes"
fi
if [[ " ${!d} " == *" nontp "* ]] ; then
opts="${opts} --env PEER_NTP=no"
else
opts="${opts} --env PEER_NTP=yes"
fi
local metric="metric_${ifvar}"
if [[ -n ${!metric} ]] ; then
opts="${opts} --env IF_METRIC=${!metric}"
fi
# Bring up DHCP for this interface (or alias)
ebegin "Running udhcpc"
# Try and load the cache if it exists
if [[ -f ${cachefile} ]]; then
if [[ " ${opts}" != *" --request="* && " ${opts} " != *" -r "* ]]; then
local x=$(<"${cachefile}")
# Check for a valid ip
[[ ${x} == *.*.*.* ]] && opts="${opts} --request=${x}"
fi
fi
# Don't use s-s-d if the user wants to quit on lease.
if [[ " ${opts} " == *" -q "* || " ${opts} " == *" --quit "* ]]; then
x="/sbin/udhcpc"
else
x="start-stop-daemon --start --exec /sbin/udhcpc \
--pidfile \"${pidfile}\" --"
fi
eval "${x}" "${opts}" --interface="${iface}" --now \
--script=/lib/rcscripts/sh/udhcpc.sh \
--pidfile="${pidfile}" >/dev/null
eend $? || return 1
# DHCP succeeded, show address retrieved
local addr=$(interface_get_address "${iface}")
einfo "${iface} received address ${addr}"
return 0
}
# vim: set ts=4 :
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