diff --git a/main.go b/main.go
index 6da8d56..dd1f80a 100644
--- a/main.go
+++ b/main.go
@@ -19,9 +19,12 @@ var localSID uint32
 var remoteSID uint32
 var sendSeq uint16
 var authSendSeq uint16
+var authInnerSendSeq uint16
 var authID [6]byte
 var randIDByteForPktSeven [1]byte
 var expectedPkt7ReplySeq uint16
+var reauthSent bool
+var lastReauthAt time.Time
 
 func send(d []byte) {
 	_, err := conn.Write(d)
@@ -97,6 +100,7 @@ func sendPkt6() {
 }
 
 func sendPktLogin() {
+	// The reply to the login packet will contain a 6 bytes long auth ID with the first 2 bytes set to our randID.
 	var randID [2]byte
 	_, err := rand.Read(randID[:])
 	if err != nil {
@@ -105,8 +109,8 @@ func sendPktLogin() {
 	send([]byte{0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
 		byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID),
 		byte(remoteSID >> 24), byte(remoteSID >> 16), byte(remoteSID >> 8), byte(remoteSID),
-		0x00, 0x00, 0x00, 0x70, 0x01, 0x00, 0x00, byte(authSendSeq),
-		byte(authSendSeq >> 8), 0x00, randID[0], randID[1], 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x70, 0x01, 0x00, 0x00, byte(authInnerSendSeq),
+		byte(authInnerSendSeq >> 8), 0x00, randID[0], randID[1], 0x00, 0x00, 0x00, 0x00,
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@@ -115,13 +119,23 @@ func sendPktLogin() {
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 		0x2b, 0x3f, 0x55, 0x5c, 0x3f, 0x25, 0x77, 0x58, // pass: beerbeer
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-		0x69, 0x63, 0x6f, 0x6d, 0x2d, 0x70, 0x63, 0x00, // icom-pc
+		0x69, 0x63, 0x6f, 0x6d, 0x2d, 0x70, 0x63, 0x00, // icom-pc in plain text
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})
+	authSendSeq++
+	authInnerSendSeq++
 }
 
 func sendPktReauth() {
+	var magic byte
+
+	if reauthSent {
+		magic = 0x05
+	} else {
+		magic = 0x02
+	}
+
 	// Example request from PC:  0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0d, 0x00,
 	//                           0xbb, 0x41, 0x3f, 0x2b, 0xe6, 0xb2, 0x7b, 0x7b,
 	//                           0x00, 0x00, 0x00, 0x30, 0x01, 0x05, 0x00, 0x02,
@@ -138,23 +152,27 @@ func sendPktReauth() {
 	//                           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 	//                           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 	//                           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
-	send([]byte{0x40, 0x00, 0x00, 0x00, 0x00, 0x00, byte(sendSeq), byte(sendSeq >> 8),
+	send([]byte{0x40, 0x00, 0x00, 0x00, 0x00, 0x00, byte(authSendSeq), byte(authSendSeq >> 8),
 		byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID),
 		byte(remoteSID >> 24), byte(remoteSID >> 16), byte(remoteSID >> 8), byte(remoteSID),
-		0x00, 0x00, 0x00, 0x30, 0x01, 0x05, 0x00, byte(authSendSeq),
-		byte(authSendSeq >> 8), 0x00, authID[0], authID[1], authID[2], authID[3], authID[4], authID[5],
+		0x00, 0x00, 0x00, 0x30, 0x01, magic, 0x00, byte(authInnerSendSeq),
+		byte(authInnerSendSeq >> 8), 0x00, authID[0], authID[1], authID[2], authID[3], authID[4], authID[5],
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})
+	reauthSent = true
+	authSendSeq++
+	authInnerSendSeq++
+	lastReauthAt = time.Now()
 }
 
 func sendDisconnect() {
 	send([]byte{0x40, 0x00, 0x00, 0x00, 0x00, 0x00, byte(sendSeq), byte(sendSeq >> 8),
 		byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID),
 		byte(remoteSID >> 24), byte(remoteSID >> 16), byte(remoteSID >> 8), byte(remoteSID),
-		0x00, 0x00, 0x00, 0x30, 0x01, 0x01, 0x00, byte(authSendSeq),
-		byte(authSendSeq >> 8), 0x00, authID[0], authID[1], authID[2], authID[3], authID[4], authID[5],
+		0x00, 0x00, 0x00, 0x30, 0x01, 0x01, 0x00, byte(authInnerSendSeq),
+		byte(authInnerSendSeq >> 8), 0x00, authID[0], authID[1], authID[2], authID[3], authID[4], authID[5],
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@@ -165,15 +183,16 @@ func sendDisconnect() {
 }
 
 func sendRequestSerialAndAudio() {
-	send([]byte{0x90, 0x00, 0x00, 0x00, 0x00, 0x00, byte(sendSeq), byte(sendSeq >> 8),
+	log.Print("requesting serial and audio stream")
+	send([]byte{0x90, 0x00, 0x00, 0x00, 0x00, 0x00, byte(authSendSeq), byte(authSendSeq >> 8),
 		byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID), byte(remoteSID >> 24), byte(remoteSID >> 16), byte(remoteSID >> 8), byte(remoteSID),
-		0x00, 0x00, 0x00, 0x80, 0x01, 0x03, 0x00, byte(authSendSeq),
-		byte(authSendSeq >> 8), 0x00, authID[0], authID[1], authID[2], authID[3], authID[4], authID[5],
+		0x00, 0x00, 0x00, 0x80, 0x01, 0x03, 0x00, byte(authInnerSendSeq),
+		byte(authInnerSendSeq >> 8), 0x00, authID[0], authID[1], authID[2], authID[3], authID[4], authID[5],
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10,
-		0x80, 0x00, 0x00, 0x90, 0xc7, 0x0e, 0x86, 0x01, // The last 5 bytes from this row can be acquired from a reply starting with 0xa8 pr 0x90
+		0x80, 0x00, 0x00, 0x90, 0xc7, 0x0e, 0x86, 0x01, // The last 5 bytes from this row can be acquired from a reply starting with 0xa8 or 0x90
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-		0x49, 0x43, 0x2d, 0x37, 0x30, 0x35, 0x00, 0x00, // IC-705
+		0x49, 0x43, 0x2d, 0x37, 0x30, 0x35, 0x00, 0x00, // IC-705 in plain text
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@@ -183,6 +202,8 @@ func sendRequestSerialAndAudio() {
 		0x00, 0x00, 0xbb, 0x80, 0x00, 0x00, 0xc3, 0x52,
 		0x00, 0x00, 0xc3, 0x53, 0x00, 0x00, 0x00, 0x64,
 		0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})
+	authSendSeq++
+	authInnerSendSeq++
 }
 
 func main() {
@@ -196,14 +217,15 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	conn, err = net.DialUDP("udp", nil, raddr)
+	laddr := net.UDPAddr{
+		Port: int(connectPort),
+	}
+	conn, err = net.DialUDP("udp", &laddr, raddr)
 	if err != nil {
 		log.Fatal(err)
 	}
 
-	// Constructing the local session ID by combining the local IP address and port.
-	laddr := conn.LocalAddr().(*net.UDPAddr)
-	localSID = binary.BigEndian.Uint32(laddr.IP[len(laddr.IP)-4:])<<16 | uint32(laddr.Port&0xffff)
+	localSID = uint32(time.Now().Unix())
 	log.Debugf("using session id %.8x", localSID)
 
 	sendPkt3()
@@ -216,7 +238,7 @@ func main() {
 		// Expecting a Pkt4 answer.
 		// Example answer from radio: 0x10, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x8c, 0x7d, 0x45, 0x7a, 0x1d, 0xf6, 0xe9, 0x0b
 		r, _ := read()
-		if bytes.Equal(r[:8], []byte{0x10, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00}) {
+		if len(r) == 16 && bytes.Equal(r[:8], []byte{0x10, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00}) {
 			remoteSID = binary.BigEndian.Uint32(r[8:12])
 			break
 		}
@@ -224,16 +246,27 @@ func main() {
 
 	log.Debugf("got remote session id %.8x", remoteSID)
 
-	sendSeq = 1
 	authSendSeq = 1
+	authInnerSendSeq = 0x50
 	sendPkt6()
-	sendPktLogin()
-	authSendSeq++
 
+	for {
+		// Expecting a Pkt6 answer.
+		r, _ := read()
+		if len(r) == 16 && bytes.Equal(r[:8], []byte{0x10, 0x00, 0x00, 0x00, 0x06, 0x00, 0x01, 0x00}) {
+			remoteSID = binary.BigEndian.Uint32(r[8:12])
+			break
+		}
+	}
+
+	sendPktLogin()
+	sendSeq = 5
+
+	var authOk bool
 	var lastPingAt time.Time
-	var lastReauthAt time.Time
 	var lastStatusLog time.Time
 	var errCount int
+	var gotFirstReauthAnswer bool
 
 	_, err = rand.Read(randIDByteForPktSeven[:])
 	if err != nil {
@@ -263,14 +296,22 @@ func main() {
 		//                              0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 		//                              0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 		//                              0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
-		if len(r) == 96 && bytes.Equal(r[:8], []byte{0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00}) {
-			if bytes.Equal(r[48:52], []byte{0xff, 0xff, 0xff, 0xfe}) {
-				log.Fatal("invalid user/password")
-			} else {
-				copy(authID[:], r[26:32])
-				log.Print("auth ok")
+		if !authOk {
+			if len(r) == 96 && bytes.Equal(r[:8], []byte{0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00}) {
+				if bytes.Equal(r[48:52], []byte{0xff, 0xff, 0xff, 0xfe}) {
+					log.Fatal("invalid user/password")
+				} else {
+					authOk = true
+					copy(authID[:], r[26:32])
+					log.Print("auth ok")
+
+					sendPktReauth()
+					time.AfterFunc(time.Second*3, sendRequestSerialAndAudio)
+				}
 			}
+			continue
 		}
+
 		if len(r) == 21 && bytes.Equal(r[1:6], []byte{0x00, 0x00, 0x00, 0x07, 0x00}) {
 			gotSeq := binary.LittleEndian.Uint16(r[6:8])
 			if r[16] == 0x00 { // This is a pkt7 request from the radio.
@@ -299,6 +340,27 @@ func main() {
 			gotSeq := binary.LittleEndian.Uint16(r[6:8])
 			send([]byte{0x10, 0x00, 0x00, 0x00, 0x00, 0x00, byte(gotSeq), byte(gotSeq >> 8), byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID), byte(remoteSID >> 24), byte(remoteSID >> 16), byte(remoteSID >> 8), byte(remoteSID)})
 		}
+		// if len(r) == 144 && bytes.Equal(r[:6], []byte{0x90, 0x00, 0x00, 0x00, 0x00, 0x00}) {
+		// }
+		if !gotFirstReauthAnswer && len(r) == 64 && bytes.Equal(r[:6], []byte{0x40, 0x00, 0x00, 0x00, 0x00, 0x00}) { // TODO
+			gotFirstReauthAnswer = true
+		}
+		if len(r) == 80 && bytes.Equal(r[:6], []byte{0x50, 0x00, 0x00, 0x00, 0x00, 0x00}) && bytes.Equal(r[48:51], []byte{0xff, 0xff, 0xff}) {
+			// Example answer from radio: 0x50, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00,
+			//							  0x86, 0x1f, 0x2f, 0xcc, 0x03, 0x03, 0x89, 0x29,
+			//							  0x00, 0x00, 0x00, 0x40, 0x02, 0x03, 0x00, 0x52,
+			//							  0x00, 0x00, 0xf8, 0xad, 0x06, 0x8d, 0xda, 0x7b,
+			//							  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10,
+			//							  0x80, 0x00, 0x00, 0x90, 0xc7, 0x0e, 0x86, 0x01,
+			//							  0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
+			//							  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			//							  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			//							  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+
+			log.Error("reauth failed")
+			sendDisconnect()
+			os.Exit(1)
+		}
 
 		if time.Since(lastPingAt) >= 100*time.Millisecond {
 			sendPkt7(nil, sendSeq)
@@ -306,10 +368,8 @@ func main() {
 			sendSeq++
 			lastPingAt = time.Now()
 
-			if time.Since(lastReauthAt) >= 60*time.Second {
+			if authOk && time.Since(lastReauthAt) >= 60*time.Second {
 				sendPktReauth()
-				authSendSeq++
-				lastReauthAt = time.Now()
 			}
 
 			if time.Since(lastStatusLog) >= 10*time.Second {