1 files changed, 55 insertions, 0 deletions
diff --git a/qtap-manipulate b/qtap-manipulate
new file mode 100755
index 0000000..b75c5ef
--- /dev/null
+++ b/qtap-manipulate
@@ -0,0 +1,55 @@
+#!/bin/sh
+[ -z "$1" ] || ( [ "$1" != "create" ] && [ -z "$2" ] ) && { echo "invalid usage, require create [device] || |destroy device"; exit 1; }
+
+#KVM_USER="kvm-envs"
+
+has() {
+	local desired=$1 x
+	shift
+	for x in "$@"; do
+		[ "$desired" = "$x" ] && return 0;
+	done
+	return 1
+}
+
+find_node() {
+	local val=$(ifconfig -a | grep -i ^qtap | cut -d ' ' -f1)
+	local pos=0
+	while has qtap${pos} $val; do
+		pos=$(( $pos + 1 ))
+	done
+	echo qtap${pos}
+}
+
+create_node() {
+	tunctl -b -u "${KVM_USER}" -t ${1} > /dev/null || { echo "tunctl failed"; exit 2; }
+	brctl addif br0 ${1} || { echo "brctl failed"; exit 2; }
+	ifconfig ${1} up 0.0.0.0 promisc || { echo "ifconfig failed"; exit 2; }
+}
+
+destroy_node() {
+	issue=
+	ifconfig ${1} down || { echo "ifconfig failed";issue=1; }
+	brctl delif br0 ${1} || { echo "brctl failed";issue=2; }
+	tunctl -d ${1} > /dev/null || { echo "tunctl failed";issue=3;}
+	[ -n "${issue}" ] && exit -$(( $issue ))
+}
+
+command=$1
+qtap=$2
+
+if [ -z "$qtap" ]; then
+	qtap=$(find_node)
+fi
+
+if [ "$command" = "create" ]; then
+	create_node "$qtap"
+	[ "$2" != "${qtap}" ] && echo "${qtap}"
+elif [ "$command" = "destroy" ]; then
+	destroy_node "$qtap"
+else
+	echo "$command isn't a valid command; must be create or destroy";
+	exit 1
+fi
+
+exit 0