net: implement netFD for WASI

Signed-off-by: Roman Volosatovs <[email protected]>

Author: rvolosatovs

src/net/fd_wasi.go

@@ -0,0 +1,57 @@
+//go:build wasi
+// +build wasi
+
+package net
+
+import (
+	"io"
+	"os"
+	"syscall"
+	"time"
+)
+
+// Network file descriptor.
+type netFD struct {
+	*os.File
+
+	net   string
+	laddr Addr
+	raddr Addr
+}
+
+// Read implements the Conn Read method.
+func (c *netFD) Read(b []byte) (int, error) {
+    // TODO: Handle EAGAIN and perform poll
+	return c.File.Read(b)
+}
+
+// Write implements the Conn Write method.
+func (c *netFD) Write(b []byte) (int, error) {
+    // TODO: Handle EAGAIN and perform poll
+	return c.File.Write(b)
+}
+
+// LocalAddr implements the Conn LocalAddr method.
+func (*netFD) LocalAddr() Addr {
+	return nil
+}
+
+// RemoteAddr implements the Conn RemoteAddr method.
+func (*netFD) RemoteAddr() Addr {
+	return nil
+}
+
+// SetDeadline implements the Conn SetDeadline method.
+func (*netFD) SetDeadline(t time.Time) error {
+	return ErrNotImplemented
+}
+
+// SetReadDeadline implements the Conn SetReadDeadline method.
+func (*netFD) SetReadDeadline(t time.Time) error {
+	return ErrNotImplemented
+}
+
+// SetWriteDeadline implements the Conn SetWriteDeadline method.
+func (*netFD) SetWriteDeadline(t time.Time) error {
+	return ErrNotImplemented
+}

src/net/net_fake.go

@@ -6,6 +6,9 @@
 
 // Fake networking. It is intended to allow tests of other package to pass.
 
+//go:build !wasi
+// +build !wasi
+
 package net
 
 import (