Add support for TLS/TCP

dial.go

@@ -18,12 +18,21 @@ type Dialer struct {
 	TLSConfig *tls.Config
 }
 
-// Dial opens a connection to a server. The network must be one of "quic",
-// "quic4", (IPv4-only) "quic6" (IPv6-only), or "unix". For now, quic is not
-// supported.
+// Dial opens a connection to a server. The network must be one of:
+// 
+// - "quic"
+// - "quic4" (IPv4-only)
+// - "quic6" (IPv6-only)
+// - "tcp"
+// - "tcp4" (IPv4-only)
+// - "tcp6" (IPv6-only)
+// - "unix"
+//
+// For now, QUIC is unsupported.
 func (diale Dialer) Dial(ctx context.Context, network, address string) (Conn, error) {
 	switch network {
 	case "quic", "quic4", "quic6": return diale.dialQUIC(ctx, network, address)
+	case "tcp", "tcp4", "tcp6":    return diale.dialTLS(ctx, network, address)
 	case "unix":                   return diale.dialUnix(ctx, network, address)
 	default:                       return nil, ErrUnknownNetwork
 	}
@@ -33,6 +42,12 @@ func (diale Dialer) dialQUIC(ctx context.Context, network, address string) (Conn
 	return nil, errors.New("quic is not yet implemented")
 }
 
+func (diale Dialer) dialTLS(ctx context.Context, network, address string) (Conn, error) {
+	conn, err := tls.Dial(network, nil, addr, diale.TLSConfig)
+	if err != nil { return nil, err }
+	return AdaptA(conn, ClientSide), nil
+}
+
 func (diale Dialer) dialUnix(ctx context.Context, network, address string) (Conn, error) {
 	if network != "unix" { return nil, ErrUnknownNetwork }
 	addr, err := net.ResolveUnixAddr(network, address)