Add sending "Configure"

Resolves #11

encoder.go

@@ -86,6 +86,22 @@ func encodeSwitchConfiguration(msg SwitchConfigurationMessage) ([]byte, error) {
 	return e.finish()
 }
 
+func encodeConfigure(msg ConfigureMessage) ([]byte, error) {
+	e := newEncoder()
+	e.encodeUint32(configureNum)
+	e.encodeUtf8(msg.Id)
+	e.encodeUtf8(msg.Mode)
+	e.encodeUint32(msg.FrequencyTolerance)
+	e.encodeUtf8(msg.Submode)
+	e.encodeBool(msg.FastMode)
+	e.encodeUint32(msg.TRPeriod)
+	e.encodeUint32(msg.RxDF)
+	e.encodeUtf8(msg.DXCall)
+	e.encodeUtf8(msg.DXGrid)
+	e.encodeBool(msg.GenerateMessages)
+	return e.finish()
+}
+
 type encoder struct {
 	buf *bytes.Buffer
 }

encoder_test.go

@@ -307,3 +307,46 @@ func Test_encodeSwitchConfiguration(t *testing.T) {
 		})
 	}
 }
+
+func Test_encodeConfigure(t *testing.T) {
+	type args struct {
+		msg ConfigureMessage
+	}
+	wantBin, _ := hex.DecodeString("adbccbda000000020000000f0000000657534a542d580000000346543400000023ffffffff010000003c000003e80000000454335354000000044a4b373301")
+	tests := []struct {
+		name    string
+		args    args
+		want    []byte
+		wantErr bool
+	}{
+		{
+			name: "encodeConfigure",
+			args: args{msg: ConfigureMessage{
+				Id:                 "WSJT-X",
+				Mode:               "FT4",
+				FrequencyTolerance: 35,
+				Submode:            "",
+				FastMode:           true,
+				TRPeriod:           60,
+				RxDF:               1000,
+				DXCall:             "T3ST",
+				DXGrid:             "JK73",
+				GenerateMessages:   true,
+			}},
+			want:    wantBin,
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := encodeConfigure(tt.args.msg)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("encodeConfigure() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("encodeConfigure() got = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

messages.go

@@ -305,3 +305,30 @@ type SwitchConfigurationMessage struct {
 }
 
 const switchConfigurationNum = 14
+
+/*
+The server  may send  this message at  any time.   The message
+specifies  various  configuration  options.  For  utf8  string
+fields an empty value implies no change, for the quint32 Rx DF
+and  Frequency  Tolerance  fields the  maximum  quint32  value
+implies  no change.   Invalid or  unrecognized values  will be
+silently ignored.
+
+In only.
+
+https://sourceforge.net/p/wsjt/wsjtx/ci/8f99fcce/tree/Network/NetworkMessage.hpp#l477
+*/
+type ConfigureMessage struct {
+	Id                 string `json:"id"`
+	Mode               string `json:"mode"`
+	FrequencyTolerance uint32 `json:"frequencyTolerance"`
+	Submode            string `json:"submode"`
+	FastMode           bool   `json:"fastMode"`
+	TRPeriod           uint32 `json:"trPeriod"`
+	RxDF               uint32 `json:"rxDF"`
+	DXCall             string `json:"dxCall"`
+	DXGrid             string `json:"dxGrid"`
+	GenerateMessages   bool   `json:"generateMessages"`
+}
+
+const configureNum = 15

server.go

@@ -106,6 +106,13 @@ func (s *Server) SwitchConfiguration(msg SwitchConfigurationMessage) error {
 	return err
 }
 
+// Send a message to WSJT-X to change various configuration options.
+func (s *Server) Configure(msg ConfigureMessage) error {
+	msgBytes, _ := encodeConfigure(msg)
+	_, err := s.conn.WriteTo(msgBytes, s.remoteAddr)
+	return err
+}
+
 func check(err error) {
 	if err != nil {
 		panic(err)