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Diffstat (limited to 'net-scripts/net/udhcpc.sh')
| -rw-r--r-- | net-scripts/net/udhcpc.sh | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/net-scripts/net/udhcpc.sh b/net-scripts/net/udhcpc.sh new file mode 100644 index 0000000..6fc1a19 --- /dev/null +++ b/net-scripts/net/udhcpc.sh @@ -0,0 +1,147 @@ +# 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_${ifvar}" + opts="${!opts}" + + d="dhcp_${ifvar}" + [[ -z ${!d} ]] && d="dhcp" + + if [[ " ${!d} " != *" nosendhost "* ]]; then + if [[ ! " ${opts}" =~ " -([hH] |-hostname=)" ]]; then + local hname="$(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 : |