interface: add stubs for wasm builds

interface_stub.go

@@ -0,0 +1,27 @@
+// TINYGO: The following is copied and modified from Go 1.26.2 official implementation.
+
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build js || wasip1
+
+package net
+
+// TINYGO: mirrors upstream net/interface_stub.go. These platforms have no
+// interface table at all, so enumeration yields an empty list and no error,
+// rather than failing. Callers that merely enumerate then see zero interfaces
+// instead of a hard error; InterfaceByIndex/InterfaceByName still report
+// errNoSuchInterface, since an empty table contains nothing.
+
+func interfaceTable(ifindex int) ([]Interface, error) {
+	return nil, nil
+}
+
+func interfaceAddrTable(ifi *Interface) ([]Addr, error) {
+	return nil, nil
+}
+
+func interfaceMulticastAddrTable(ifi *Interface) ([]Addr, error) {
+	return nil, nil
+}