Speak protocol 3.0 and fall back to 2.0 only when that is the reflector's maximum.

A reflector that has moved to 3.0 will not accept a station that always announces 2.0, and a 2.x reflector still needs one explicit plaintext session.

Co-authored-by: Cursor <cursoragent@cursor.com>

station/station.go

@@ -24,6 +24,7 @@ type State struct {
 	Detail       string `json:"detail"`
 	Callsign     string `json:"callsign"`
 	TalkGroup    int    `json:"talkGroup"`
+	Protocol     string `json:"protocol"`
 	Talker       string `json:"talker"`
 	Transmitting bool   `json:"transmitting"`
 }
@@ -39,13 +40,27 @@ type Station struct {
 	buttonHeld   bool
 	spaceHeld    bool
 	fatal        string
+	retryReason  string
+	protocol     string
 	remoteTalker string
 	roomBusy     bool
+	audioHeard   bool
+	lastAudio    time.Time
+	flushWaiting bool
+	flushAt      time.Time
+	rxSeq        uint16
+	secure       bool
+	udpWait      bool
+	ivPrefix     []byte
+	udpKey       []byte
+	rxCounter    uint32
+	txCounter    uint32
 	mic          []int16
 	play         []int16
 	clientID     uint16
 	seq          uint16
 	udp          *net.UDPConn
+	udpPeer      *net.UDPAddr
 	lastUDPSend  time.Time
 	enc          *opus.Encoder
 	dec          *opus.Decoder
@@ -73,7 +88,9 @@ func New(opt Options) (*Station, error) {
 		clock = wallClock{}
 	}
 	detail := "Idle"
-	if cfg.logNotice != "" {
+	if cfg.certFatal != "" {
+		detail = cfg.certFatal
+	} else if cfg.logNotice != "" {
 		detail = cfg.logNotice
 	}
 	s := &Station{
@@ -82,6 +99,7 @@ func New(opt Options) (*Station, error) {
 		wake:      make(chan struct{}, 1),
 		logPath:   cfg.logPath,
 		logNotice: cfg.logNotice,
+		fatal:     cfg.certFatal,
 		state: State{
 			Connection: "Disconnected",
 			Detail:     detail,