Add method for sending UI frames

For beaconing etc.
la5nta · Jan 28, 2023 · 1af7ec2 · 1af7ec2
1 parent bbfd3eb
commit 1af7ec2
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Showing 2 changed files with 18 additions and 0 deletions.
diff --git a/transport/ax25/agwpe/frame_kinds.go b/transport/ax25/agwpe/frame_kinds.go
@@ -19,6 +19,7 @@ const (
 	kindDisconnect               kind = 'd'
 	kindConnectedData            kind = 'D'
 	kindOutstandingFramesForConn kind = 'Y' // Direwolf >= 1.4
+	kindUnprotoInformation       kind = 'M'
 )
 
 func versionNumberFrame() frame {
@@ -112,6 +113,15 @@ func connectViaFrame(from, to string, port uint8, digis []string) frame {
 	return frame{header: h, Data: buf.Bytes()}
 }
 
+func unprotoInformationFrame(from, to string, port uint8, data []byte) frame {
+	h := header{
+		DataKind: kindUnprotoInformation,
+		From:     callsignFromString(from),
+		To:       callsignFromString(to),
+	}
+	return frame{header: h, Data: data}
+}
+
 func disconnectFrame(from, to string, port uint8) frame {
 	h := header{DataKind: kindDisconnect}
 	copy(h.From[:], from)

diff --git a/transport/ax25/agwpe/port.go b/transport/ax25/agwpe/port.go
@@ -157,6 +157,14 @@ func (p *Port) Listen() (net.Listener, error) {
 	return newListener(p), nil
 }
 
+func (p *Port) SendUI(data []byte, dst string) error {
+	if p.demux.isClosed() {
+		return ErrPortClosed
+	}
+	f := unprotoInformationFrame(p.mycall, dst, p.port, data)
+	return p.tnc.write(f)
+}
+
 func (p *Port) numOutstandingFrames() (int, error) {
 	resp := p.demux.NextFrame(kindOutstandingFramesForPort)
 	f := outstandingFramesForPortFrame(p.port)