PKGBUILDs/core/initscripts/network

#!/bin/bash

. /etc/rc.conf
. /etc/rc.d/functions

for s in wireless bonding bridges dhcpcd; do
	[[ -f /etc/conf.d/$s ]] && . "/etc/conf.d/$s"
done

# helper function to determine if legacy network support is needed
need_legacy() {
	# complain when `interface' is unset and `INTERFACES' has profiles enabled
	if [[ -z $interface && ${INTERFACES[@]##!*} ]]; then
		return 0 # need legacy
	fi

	return 1 # enough present for iproute2 support
}

deprecated() {
	printf "${C_FAIL}Warning:${C_CLEAR} Your network settings are deprecated.\n"
	printf "  Please refer to /etc/rc.conf on how to define a single wired\n"
	printf "  connection, or use a utility such as netcfg.\n"
}

network_up() {
	ip link set dev $interface up || return 1

	if [[ $address ]]; then
		ip addr add $address/${netmask:-24} broadcast ${broadcast:-+} dev $interface || return 1
		[[ $gateway ]] && { ip route add default via $gateway || return 1; }
	else
		dhcpcd $DHCPCD_ARGS $interface || return 1
	fi
}

network_down() {
	if [[ -f /var/run/dhcpcd-$interface.pid ]]; then
		dhcpcd -k $interface || return 1
	else
		ip addr flush dev $interface || return 1
	fi

	ip link set dev $interface down || return 1
}

ifup() {
	local ifcfg=${!1}

	if [[ ! $1 ]]; then
		echo "usage: $0 ifup <interface_name>"
		return 1
	fi

	# Get the name of the interface from the first token in the string
	if [[ $ifcfg = dhcp ]]; then
		ifname=$1
	else
		ifname=${ifcfg%% *}
	fi

	ifconfig $ifname up

	wi_up $1 || return 1

	if [[ $ifcfg = dhcp ]]; then
		# remove the .pid file if it exists
		rm -f /var/run/dhcpcd-${1}.pid >/dev/null 2>&1
		rm -f /var/run/dhcpcd-${1}.cache >/dev/null 2>&1
		dhcpcd $DHCPCD_ARGS ${1}
	else
		ifconfig $ifcfg
	fi
}

wi_up() {
	local iwcfg=wlan_$1

	[[ ${!iwcfg} ]] || return 0

	iwconfig ${!iwcfg}
	[[ $WIRELESS_TIMEOUT ]] || WIRELESS_TIMEOUT=2
	sleep $WIRELESS_TIMEOUT

	bssid=$(iwgetid $1 -ra)
	if [[ $bssid = 00:00:00:00:00:00 ]]; then
		printhl "Could not associate $1 - try increasing WIRELESS_TIMEOUT and check network is WEP or has no security"
		return 1
	fi
	return 0
}

ifdown() {
	local ifcfg=${!1}

	if [[ ! $1 ]]; then
		echo "usage: $0 ifdown <interface_name>"
		return 1
	fi

	if [[ $ifcfg = dhcp && -f /var/run/dhcpcd-${1}.pid ]]; then
		dhcpcd -k ${1} >/dev/null 2>&1
	fi
	# Always bring the interface itself down
	ifconfig ${1} down >/dev/null 2>&1
}

iflist() {
	for ifline in ${INTERFACES[@]}; do
		if [[ $ifline = ${ifline#!} ]]; then
			printf " $ifline:\t"
		else
			printf "$ifline:\t"
		fi
		echo ${!ifline#!}
	done
}

rtup() {
	local routecfg=${!1}

	if [[ ! $1 ]]; then
		echo "usage: $0 rtup <route_name>"
		return 1
	fi

	if [[ $routecfg =~ :: ]]; then
		route -A inet6 add $routecfg
	else
		route add $routecfg
	fi
}

rtdown() {
	local routecfg=${!1}

	if [[ ! $1 ]]; then
		echo "usage: $0 rtdown <route_name>"
		return 1
	fi

	if [[ $routecfg =~ :: ]]; then
		route -A inet6 del $routecfg
	else
		route del $routecfg
	fi
}

rtlist() {
	for rtline in ${ROUTES[@]}; do
		if [[ $rtline = ${rtline#!} ]]; then
			printf " $rtline:\t"
		else
			printf "$rtline:\t"
		fi
		echo ${!rtline#!}
	done
}

bond_up() {
	for ifline in ${BOND_INTERFACES[@]}; do
		if [[ $ifline = ${ifline#!} ]]; then
			bondcfg="bond_$ifline"
			if [[ ${!bondcfg} ]]; then
				ifenslave $ifline ${!bondcfg} || error=1
			fi
		fi
	done
}

bond_down() {
	for ifline in ${BOND_INTERFACES[@]}; do
		if [[ $ifline = ${ifline#!} ]]; then
			bondcfg="bond_$ifline"
			ifenslave -d $ifline ${!bondcfg} || error=1
		fi
	done
}

bridge_up() {
	for br in ${BRIDGE_INTERFACES[@]}; do
		if [[ $br = ${br#!} ]]; then
			# if the bridge already exists, remove it
			if [[ $(ifconfig $br 2>/dev/null) ]]; then
				ifconfig $br down
				brctl delbr $br
			fi
			brctl addbr $br
			brifs="bridge_$br"
			for brif in ${!brifs}; do
				if [[ $brif = ${brif#!} ]]; then
					for ifline in ${BOND_INTERFACES[@]}; do
						if [[ $brif = $ifline && $ifline = ${ifline#!} ]]; then
							ifup $ifline
							bondcfg="bond_$ifline"
							ifenslave $ifline ${!bondcfg} || error=1
							unset bond_$ifline
						fi
					done

					brctl addif $br $brif || error=1
				fi
			done
		fi
	done
}

bridge_down() {
	for br in ${BRIDGE_INTERFACES[@]}; do
		if [[ $br = ${br#!} ]]; then
			brctl delbr $br
		fi
	done
}


case "$1" in
	start)
		# deprecation check
		need_legacy && deprecated
		if ! ck_daemon network; then
			echo "Network is already running.  Try 'network restart'"
			exit
		fi
		stat_busy "Starting Network"
		error=0
		if need_legacy; then
			# bring up bridge interfaces
			bridge_up
			# bring up ethernet interfaces
			for ifline in ${INTERFACES[@]}; do
				if [[ $ifline = ${ifline#!} ]]; then
					ifup $ifline || error=1
				fi
			done
			# bring up bond interfaces
			bond_up
			# bring up routes
			for rtline in "${ROUTES[@]}"; do
				if [ "$rtline" = "${rtline#!}" ]; then
					rtup $rtline || error=1
				fi
			done
		else
			network_up
		fi
		if ((error == 0)); then
			add_daemon network
			stat_done
		else
			stat_fail
		fi
		;;
	stop)
		# deprecation check
		need_legacy && deprecated
		if [[ $NETWORK_PERSIST =~ yes|YES && $RUNLEVEL == [06] ]]; then
			status "Skipping Network Shutdown" true
			exit 0
		fi

		stat_busy "Stopping Network"
		rm_daemon network
		error=0
		if need_legacy; then
			for rtline in "${ROUTES[@]}"; do
				if [[ $rtline = ${rtline#!} ]]; then
					rtdown $rtline || error=1
				fi
			done
			# bring down bond interfaces
			bond_down
			for ifline in ${INTERFACES[@]}; do
				if [[ $ifline = ${ifline#!} ]]; then
					ifdown $ifline || error=1
				fi
			done
			# bring down bridge interfaces
			bridge_down
		else
			network_down
		fi
		if ((error == 0)); then
			stat_done
		else
			stat_fail
		fi
		;;
	restart)
		$0 stop
		sleep 2
		$0 start
		;;
	ifup|ifdown|iflist|rtup|rtdown|rtlist)
		# deprecation check
		deprecated
		$1 $2
		;;
	*)
		echo "usage: $0 {start|stop|restart}"
		echo "       $0 {ifup|ifdown|iflist|rtup|rtdown|rtlist}";;
esac

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