+ action "Restoring interface configuration" "$script"
+ rc=$?
+ if test $rc = 0; then
+ level=debug
+ else
+ level=err
+ fi
+ log="logger -p daemon.$level -t ovs-save"
+ $log "force-reload-kmod interface restore script exited with status $rc:"
+ $log -f "$script"
+}
+
+## --------------- ##
+## enable-protocol ##
+## --------------- ##
+
+enable_protocol () {
+ # Translate the protocol name to a number, because "iptables -n -L" prints
+ # some protocols by name (despite the -n) and therefore we need to look for
+ # both forms.
+ #
+ # (iptables -S output is more uniform but old iptables doesn't have it.)
+ protonum=`grep "^$PROTOCOL[ ]" /etc/protocols | awk '{print $2}'`
+ if expr X"$protonum" : X'[0-9]\{1,\}$' > /dev/null; then :; else
+ log_failure_msg "unknown protocol $PROTOCOL"
+ return 1
+ fi
+
+ name=$PROTOCOL
+ match="(\$2 == \"$PROTOCOL\" || \$2 == $protonum)"
+ insert="iptables -I INPUT -p $PROTOCOL"
+ if test X"$DPORT" != X; then
+ name="$name to port $DPORT"
+ match="$match && /dpt:$DPORT/"
+ insert="$insert --dport $DPORT"
+ fi
+ if test X"$SPORT" != X; then
+ name="$name from port $SPORT"
+ match="$match && /spt:$SPORT/"
+ insert="$insert --sport $SPORT"
+ fi
+ insert="$insert -j ACCEPT"
+
+ if (iptables -n -L INPUT) >/dev/null 2>&1; then
+ if iptables -n -L INPUT | awk "$match { n++ } END { exit n == 0 }"
+ then
+ # There's already a rule for this protocol. Don't override it.
+ log_success_msg "iptables already has a rule for $name, not explicitly enabling"
+ else
+ action "Enabling $name with iptables" $insert
+ fi
+ elif (iptables --version) >/dev/null 2>&1; then
+ action "cannot list iptables rules, not adding a rule for $name"
+ else
+ action "iptables binary not installed, not adding a rule for $name"
+ fi