Add implementation for unsupported platforms (aws#4681)

Author: xxx0624

agent/vendor/github.com/aws/amazon-ecs-agent/ecs-agent/tmds/utils/utils_unsupported.go

@@ -0,0 +1,31 @@
+//go:build !linux && !windows
+// +build !linux,!windows
+
+// Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"). You may
+// not use this file except in compliance with the License. A copy of the
+// License is located at
+//
+//	http://aws.amazon.com/apache2.0/
+//
+// or in the "license" file accompanying this file. This file is distributed
+// on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+// express or implied. See the License for the specific language governing
+// permissions and limitations under the License.
+package utils
+
+import (
+	"errors"
+
+	"github.com/aws/amazon-ecs-agent/ecs-agent/tmds/handlers/v4/state"
+)
+
+// GetDefaultNetworkInterfaces returns network interfaces with the highest priority default routes
+// for IPv4 and IPv6. If both default routes use the same interface, only one interface is returned.
+// Returns an empty slice if no default routes are found. This is only supported on linux as of now.
+func GetDefaultNetworkInterfaces(
+	unknown interface{},
+) ([]state.NetworkInterface, error) {
+	return nil, errors.New("not supported on unknown platform")
+}

agent/vendor/github.com/aws/amazon-ecs-agent/ecs-agent/tmds/utils/utils_windows.go

@@ -0,0 +1,31 @@
+//go:build windows
+// +build windows
+
+// Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"). You may
+// not use this file except in compliance with the License. A copy of the
+// License is located at
+//
+//	http://aws.amazon.com/apache2.0/
+//
+// or in the "license" file accompanying this file. This file is distributed
+// on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+// express or implied. See the License for the specific language governing
+// permissions and limitations under the License.
+package utils
+
+import (
+	"errors"
+
+	"github.com/aws/amazon-ecs-agent/ecs-agent/tmds/handlers/v4/state"
+)
+
+// GetDefaultNetworkInterfaces returns network interfaces with the highest priority default routes
+// for IPv4 and IPv6. If both default routes use the same interface, only one interface is returned.
+// Returns an empty slice if no default routes are found. This is only supported on linux as of now.
+func GetDefaultNetworkInterfaces(
+	unknown interface{},
+) ([]state.NetworkInterface, error) {
+	return nil, errors.New("not supported on windows")
+}