1 files changed, 123 insertions, 0 deletions
diff --git a/net/bridge.sh b/net/bridge.sh
new file mode 100644
index 00000000..517fe72d
--- /dev/null
+++ b/net/bridge.sh
@@ -0,0 +1,123 @@
+# Copyright 2007-2008 Roy Marples <roy@marples.name>
+# All rights reserved. Released under the 2-clause BSD license.
+
+bridge_depend()
+{
+	before interface macnet
+	program /sbin/brctl
+}
+
+_config_vars="$_config_vars bridge bridge_add brctl"
+
+_is_bridge()
+{
+	brctl show 2>/dev/null | grep -q "^${IFACE}[[:space:]]"
+}
+
+bridge_pre_start()
+{
+	local ports= brif= iface="${IFACE}" e= x=
+	local ports="$(_get_array "bridge_${IFVAR}")"
+	local opts="$(_get_array "brctl_${IFVAR}")"
+	
+	eval brif=\$bridge_add_${IFVAR}
+	[ -z "${ports}" -a -z "${brif}" -a -z "${opts}" ] && return 0
+
+	[ -n "${ports}" ] && bridge_post_stop
+
+	(
+	if [ -z "${ports}" -a -n "${brif}" ]; then
+		ports="${IFACE}"
+		IFACE="${brif}"
+	else
+		ports="${ports}"
+		metric=1000
+	fi
+
+	if ! _is_bridge; then
+		ebegin "Creating bridge ${IFACE}"
+		if ! brctl addbr "${IFACE}"; then
+			eend 1
+			return 1
+		fi
+	fi
+
+	local IFS="$__IFS"
+	for x in ${opts}; do
+		unset IFS
+		set -- ${x}
+		x=$1
+		shift
+		set -- "${x}" "${IFACE}" "$@"
+		brctl "$@"
+	done
+	unset IFS
+
+	if [ -n "${ports}" ]; then
+		einfo "Adding ports to ${IFACE}"
+		eindent
+
+		local OIFACE="${IFACE}"
+		for x in ${ports}; do
+			ebegin "${x}"
+			local IFACE="${x}"
+			_set_flag promisc
+			_up
+			if ! brctl addif "${OIFACE}" "${x}"; then
+				_set_flag -promisc
+				eend 1
+				return 1
+			fi
+			eend 0
+		done
+		eoutdent
+	fi
+	) || return 1
+
+	# Bring up the bridge
+	_up
+}
+
+bridge_post_stop()
+{
+	local port= ports= delete=false extra=
+
+	if _is_bridge; then
+		ebegin "Destroying bridge ${IFACE}"
+		_down
+		ports="$(brctl show 2>/dev/null | \
+			sed -n -e '/^'"${IFACE}"'[[:space:]]/,/^\S/ { /^\('"${IFACE}"'[[:space:]]\|\t\)/s/^.*\t//p }')"
+		delete=true
+		iface=${IFACE}
+		eindent
+	else
+		# Work out if we're added to a bridge for removal or not
+		eval set -- $(brctl show 2>/dev/null | sed -e "s/'/'\\\\''/g" -e "s/$/'/g" -e "s/^/'/g")
+		local line=
+		for line; do
+			set -- ${line}
+			if [ "$3" = "${IFACE}" ]; then
+				iface=$1
+				break
+			fi
+		done
+		[ -z "${iface}" ] && return 0
+		extra=" from ${iface}"
+	fi
+
+	for port in ${ports}; do
+		ebegin "Removing port ${port}${extra}"
+		local IFACE="${port}"
+		_set_flag -promisc
+		brctl delif "${iface}" "${port}"
+		eend $?
+	done
+
+	if ${delete}; then
+		eoutdent
+		brctl delbr "${iface}"
+		eend $?
+	fi
+	
+	return 0
+}