#!/bin/sh

set -e

# Executor for advanced GRE tunnel management.

[ -z "$IF_GRE_LOCAL" ] && exit 1
[ -z "$IF_GRE_REMOTE" ] && exit 1
[ -z "$IF_GRE_MODE" ] && IF_GRE_MODE="gre"

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_GRE_DEV"
	;;
esac