errors from newPacket() now propogated

Send() and Close() methods now use pointer receivers.

vbantxt.go

@@ -8,7 +8,7 @@ import (
 
 // VbanTxt is used to send VBAN-TXT requests to a distant Voicemeeter/Matrix.
 type VbanTxt struct {
-	udpConn   io.WriteCloser
+	conn      io.WriteCloser
 	packet    packet
 	ratelimit time.Duration
 }
@@ -16,14 +16,19 @@ type VbanTxt struct {
 // New constructs a fully formed VbanTxt instance. This is the package's entry point.
 // It sets default values for it's fields and then runs the option functions.
 func New(host string, port int, streamname string, options ...Option) (*VbanTxt, error) {
-	udpConn, err := newUDPConn(host, port)
+	conn, err := newUDPConn(host, port)
 	if err != nil {
 		return nil, fmt.Errorf("error creating UDP client for (%s:%d): %w", host, port, err)
 	}
 
+	packet, err := newPacket(streamname)
+	if err != nil {
+		return nil, fmt.Errorf("error creating packet: %w", err)
+	}
+
 	vt := &VbanTxt{
-		udpConn:   udpConn,
-		packet:    newPacket(streamname),
+		conn:      conn,
+		packet:    packet,
 		ratelimit: time.Duration(20) * time.Millisecond,
 	}
 
@@ -34,10 +39,10 @@ func New(host string, port int, streamname string, options ...Option) (*VbanTxt,
 	return vt, nil
 }
 
-// Send is resonsible for firing each VBAN-TXT request.
+// Send is responsible for firing each VBAN-TXT request.
 // It waits for {vt.ratelimit} time before returning.
-func (vt VbanTxt) Send(cmd string) error {
-	_, err := vt.udpConn.Write(append(vt.packet.header(), []byte(cmd)...))
+func (vt *VbanTxt) Send(cmd string) error {
+	_, err := vt.conn.Write(append(vt.packet.header(), cmd...))
 	if err != nil {
 		return fmt.Errorf("error sending command (%s): %w", cmd, err)
 	}
@@ -50,8 +55,8 @@ func (vt VbanTxt) Send(cmd string) error {
 }
 
 // Close is responsible for closing the UDP Client connection.
-func (vt VbanTxt) Close() error {
-	err := vt.udpConn.Close()
+func (vt *VbanTxt) Close() error {
+	err := vt.conn.Close()
 	if err != nil {
 		return fmt.Errorf("error attempting to close UDP Client: %w", err)
 	}