1 files changed, 109 insertions, 0 deletions
diff --git a/net-scripts/net.modules.d/arping.sh b/net-scripts/net.modules.d/arping.sh
new file mode 100644
index 0000000..1a476e7
--- /dev/null
+++ b/net-scripts/net.modules.d/arping.sh
@@ -0,0 +1,109 @@
+# Copyright (c) 2004-2006 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# Contributed by Roy Marples (uberlord@gentoo.org)
+
+# void arping_depend(void)
+#
+# Sets up the dependancies for the module
+arping_depend() {
+	functions interface_exists interface_up
+}
+
+# bool arping_check_installed(void)
+#
+# Returns 0 if arping or arping2 is installed, otherwise 1
+arping_check_installed() {
+	[[ -x /sbin/arping || -x /usr/sbin/arping2 ]] && return 0
+	if ${1:-false}; then
+		eerror "For arping support emerge net-misc/iputils or net-analyzer/arping"
+	fi
+	return 1
+}
+
+# bool arping_address_exists(char *interface, char *address)
+#
+# Returns 0 if the address on the interface responds to an arping
+# 1 if not - packets defaults to 1
+# If neither arping (net-misc/iputils) or arping2 (net-analyzer/arping)
+# is installed then we return 1
+arping_address_exists() {
+	local iface="$1" address="${2%%/*}" i
+
+	# We only handle IPv4 addresses
+	[[ ${address} != *.*.*.* ]] && return 1
+
+	# 0.0.0.0 isn't a valid address - and some lusers have configured this
+	[[ ${address} == "0.0.0.0" || ${address} == "0" ]] && return 1
+
+	# We need to bring the interface up to test
+	interface_up "${iface}"
+
+	if [[ -x /sbin/arping ]] ; then
+		/sbin/arping -q -c 2 -w 3 -D -f -I "${iface}" "${address}" \
+		&>/dev/null || return 0
+	elif [[ -x /usr/sbin/arping2 ]] ; then
+		for (( i=0; i<3; i++ )) ; do
+			/usr/sbin/arping2 -0 -c 1 -i "${iface}" "${address}" \
+			&>/dev/null && return 0
+		done
+	fi
+	return 1
+}
+
+# bool arping_start(char *iface)
+#
+# arpings a list of gateways
+# If one is foung then apply it's configuration
+arping_start() {
+	local iface="$1" gateways x conf i
+
+	interface_exists "${iface}" true || return 1
+
+	einfo "Pinging gateways on ${iface} for configuration"
+
+	gateways="gateways_${ifvar}[@]"
+	if [[ -z ${!gateways} ]] ; then
+		eerror "No gateways have been defined (gateways_${ifvar}=\"...\")"
+		return 1
+	fi
+
+	eindent
+	
+	for x in ${!gateways}; do
+		vebegin "${x}"
+		if arping_address_exists "${iface}" "${x}" ; then
+			for i in ${x//./ } ; do
+				if [[ ${#i} == "2" ]] ; then
+					conf="${conf}0${i}"
+				elif [[ ${#i} == "1" ]] ; then
+					conf="${conf}00${i}"
+				else
+					conf="${conf}${i}"
+				fi
+			done
+			veend 0
+			eoutdent
+			veinfo "Configuring ${iface} for ${x}"
+			configure_variables "${iface}" "${conf}"
+
+			# Call the system module as we've aleady passed it by ....
+			# And it *has* to be pre_start for other things to work correctly
+			system_pre_start "${iface}"
+			
+			t="config_${ifvar}[@]"
+			config=( "${!t}" )
+			t="fallback_config_${ifvar}[@]"
+			fallback_config=( "${!t}" )
+			t="fallback_route_${ifvar}[@]"
+			fallback_route=( "${!t}" )
+			config_counter=-1
+			return 0
+		fi
+		veend 1
+	done
+
+	eoutdent
+	return 1
+}
+
+# vim: set ft=sh ts=4 :