1 files changed, 131 insertions, 0 deletions
diff --git a/net/arping.sh b/net/arping.sh
new file mode 100644
index 00000000..8046c47d
--- /dev/null
+++ b/net/arping.sh
@@ -0,0 +1,131 @@
+# Copyright 2007-2008 Roy Marples <roy@marples.name>
+# All rights reserved. Released under the 2-clause BSD license.
+
+arping_depend()
+{
+	program /sbin/arping /usr/sbin/arping2
+	before interface
+}
+
+arping_address()
+{
+	local ip=${1%%/*} mac="$2" spoof="$3" foundmac= i= w= opts=
+
+	# We only handle IPv4 addresses
+	case "${ip}" in
+		0.0.0.0|0) return 1;;
+		*.*.*.*);;
+		*) return 1;;
+	esac
+
+	# We need to bring the interface up to test
+	_exists "${iface}" || return 1 
+	_up "${iface}"
+
+	eval w=\$arping_wait_${IFVAR}
+	[ -z "${w}" ] && w=${arping_wait:-5}
+
+	if type arping2 >/dev/null 2>&1; then
+		if [ -n "${spoof}" ]; then
+			opts="${opts} -S ${spoof}"
+		else
+			[ -z "$(_get_inet_address)" ] && opts="${opts} -0"
+		fi
+		while [ ${w} -gt 0 -a -z "${foundmac}" ]; do
+			foundmac="$(arping2 ${opts} -r -c 1 -i "${IFACE}" "${ip}" 2>/dev/null | \
+			sed -e 'y/abcdef/ABCDEF/')"
+			w=$((${w} - 1))
+		done
+	else
+		[ -z "$(_get_inet_address)" ] && opts="${opts} -D"
+
+		foundmac="$(arping -w "${w}" ${opts} -f -I "${IFACE}" "${ip}" 2>/dev/null | \
+		sed -n -e 'y/abcdef/ABCDEF/' -e 's/.*\[\([^]]*\)\].*/\1/p')"
+	fi
+	[ -z "${foundmac}" ] && return 1
+	
+	if [ -n "${mac}" ]; then
+		if [ "${mac}" != "${foundmac}" ]; then
+			vewarn "Found ${ip} but MAC ${foundmac} does not match"
+			return 1
+		fi
+	fi
+
+	return 0
+}
+
+_arping_in_config()
+{
+	_get_array "config_${IFVAR}" | while read i; do
+		[ "${i}" = "arping" ] && return 1
+	done
+	return 1
+}
+
+arping_start()
+{
+	local gateways= x= conf= i=
+	einfo "Pinging gateways on ${IFACE} for configuration"
+
+	eval gateways=\$gateways_${IFVAR}
+	if [ -z "${gateways}" ]; then
+		eerror "No gateways have been defined (gateways_${IFVAR}=\"...\")"
+		return 1
+	fi
+
+	eindent
+	
+	for x in ${gateways}; do
+		local IFS=,
+		set -- ${x}
+		local ip=$1 mac=$2 spoof=$3 extra=
+		unset IFS
+
+		if [ -n "${mac}" ]; then
+			mac="$(echo "${mac}" | tr '[:lower:]' '[:upper:]')"
+			extra="(MAC ${mac})"
+		fi
+
+		vebegin "${ip} ${extra}"
+		if arping_address "${ip}" "${mac}" "${spoof}"; then
+			local IFS=.
+			for i in ${ip}; do
+				if [ "${#i}" = "2" ]; then
+					conf="${conf}0${i}"
+				elif [ "${#i}" = "1" ]; then
+					conf="${conf}00${i}"
+				else
+					conf="${conf}${i}"
+				fi
+			done
+			unset IFS
+			[ -n "${mac}" ] && conf="${conf}_$(echo "${mac}" | sed -e 's/://g')"
+
+			eend 0
+			eoutdent
+			veinfo "Configuring ${IFACE} for ${ip} ${extra}"
+			_configure_variables ${conf}
+
+			# Call the system module as we've aleady passed it by ....
+			# And it *has* to be pre_start for other things to work correctly
+			system_pre_start
+
+			# Ensure that we have a valid config - ie arping is no longer there
+			local IFS="$__IFS"
+			for i in $(_get_array "config_${IFVAR}"); do
+				if [ "${i}" = "arping" ]; then
+					eend 1 "No config found for ${ip} (config_${conf}=\"...\")"
+					continue 2
+				fi
+			done
+			unset IFS
+			
+			_load_config
+			return 0
+		fi
+		veend 1
+	done
+
+	eoutdent
+	return 1
+}