add gre executor

executor-scripts/linux/gre

@@ -0,0 +1,29 @@
+#!/bin/sh
+
+# Executor for advanced GRE tunnel management.
+
+[ -z "$IF_GRE_LOCAL" ] && exit 1
+[ -z "$IF_GRE_REMOTE" ] && exit 1
+[ -z "$IF_GRE_MODE" ] && exit 1
+
+COMMAND="link"
+FAMILY="-4"
+[ "$IF_GRE_MODE" = "ip6gre" ] && FAMILY="-6"
+
+PARAMS="mode $IF_GRE_MODE local '$IF_GRE_LOCAL' remote '$IF_GRE_REMOTE'"
+[ -n "$IF_GRE_TTL" ] && PARAMS="$PARAMS ttl '$IF_GRE_TTL'"
+[ -n "$IF_GRE_FLAGS" ] && PARAMS="$PARAMS $IF_GRE_FLAGS"
+
+[ -n "$PARAMS" ] || exit 0
+
+case "$PHASE" in
+pre-up)
+	${MOCK} eval ip $FAMILY $COMMAND add $IFACE $PARAMS
+	;;
+post-down)
+	${MOCK} ip $FAMILY $COMMAND del $IFACE
+	;;
+depend)
+	echo "$IF_TUNNEL_DEV"
+	;;
+esac