# Network configuration
TARGET_INTERFACE="spdk_tgt_int"
INITIATOR_INTERFACE="spdk_init_int"
TARGET_NAMESPACE="spdk_iscsi_ns"
TARGET_NS_CMD="ip netns exec $TARGET_NAMESPACE"

# iSCSI target configuration
TARGET_IP=10.0.0.1
INITIATOR_IP=10.0.0.2
ISCSI_PORT=3260
NETMASK=$INITIATOR_IP/32
INITIATOR_TAG=2
INITIATOR_NAME=ANY
PORTAL_TAG=1
ISCSI_APP="$TARGET_NS_CMD ./app/iscsi_tgt/iscsi_tgt -i 0"
ISCSI_TEST_CORE_MASK=0xFF

function create_veth_interfaces() {
	# $1 = test type (posix/vpp)
	ip netns del $TARGET_NAMESPACE || true
	ip link delete $INITIATOR_INTERFACE || true

	trap "cleanup_veth_interfaces $1; exit 1" SIGINT SIGTERM EXIT

	# Create veth (Virtual ethernet) interface pair
	ip link add $INITIATOR_INTERFACE type veth peer name $TARGET_INTERFACE
	ip addr add $INITIATOR_IP/24 dev $INITIATOR_INTERFACE
	ip link set $INITIATOR_INTERFACE up

	# Create and add interface for target to network namespace
	ip netns add $TARGET_NAMESPACE
	ip link set $TARGET_INTERFACE netns $TARGET_NAMESPACE

	$TARGET_NS_CMD ip link set lo up
	$TARGET_NS_CMD ip addr add $TARGET_IP/24 dev $TARGET_INTERFACE
	$TARGET_NS_CMD ip link set $TARGET_INTERFACE up

	# Verify connectivity
	ping -c 1 $TARGET_IP
	ip netns exec $TARGET_NAMESPACE ping -c 1 $INITIATOR_IP
}

function cleanup_veth_interfaces() {
	# $1 = test type (posix/vpp)

	# Cleanup veth interfaces and network namespace
	# Note: removing one veth, removes the pair
	ip link delete $INITIATOR_INTERFACE
	ip netns del $TARGET_NAMESPACE
}