feat: Themes added, 4 themes available (3 dark, 1 light)

cmd/icomnettest/main.go

@@ -54,6 +54,65 @@ func ctrlPacket(typ uint16, seq uint16, sentid, rcvdid uint32) []byte {
 	return b
 }
 
+// passcodeSeq is Icom's fixed obfuscation table for the login username/password
+// (used by RS-BA1). BEST-EFFORT public reconstruction — the values that matter
+// for a given credential are sequence[char+index]; if the radio rejects auth,
+// compare the "scrambled" bytes this tool prints against a real login capture to
+// correct the needed entries.
+var passcodeSeq = [256]byte{
+	0x47, 0x5d, 0x4c, 0x42, 0x66, 0x20, 0x23, 0x46, 0x4e, 0x57, 0x45, 0x3d, 0x67, 0x76, 0x60, 0x41,
+	0x62, 0x39, 0x59, 0x2d, 0x68, 0x7e, 0x20, 0x77, 0x5f, 0x51, 0x3e, 0x70, 0x4d, 0x1f, 0x74, 0x38,
+	0x2c, 0x4b, 0x1e, 0x54, 0x30, 0x71, 0x2b, 0x2a, 0x66, 0x27, 0x2e, 0x58, 0x24, 0x21, 0x2f, 0x50,
+	0x1b, 0x73, 0x69, 0x36, 0x1d, 0x4f, 0x1c, 0x51, 0x2e, 0x1e, 0x45, 0x2e, 0x22, 0x50, 0x64, 0x66,
+	0x24, 0x36, 0x0c, 0x7d, 0x50, 0x25, 0x7c, 0x3f, 0x2d, 0x35, 0x71, 0x6a, 0x0e, 0x41, 0x2a, 0x67,
+	0x7c, 0x64, 0x77, 0x67, 0x6d, 0x5b, 0x3d, 0x5b, 0x2b, 0x67, 0x6c, 0x39, 0x35, 0x76, 0x3b, 0x2f,
+	0x2f, 0x6d, 0x59, 0x6e, 0x59, 0x77, 0x3b, 0x24, 0x74, 0x7c, 0x6b, 0x37, 0x54, 0x5c, 0x4d, 0x1f,
+	0x27, 0x69, 0x5b, 0x2e, 0x28, 0x35, 0x77, 0x74, 0x35, 0x1f, 0x6a, 0x2a, 0x28, 0x30, 0x25, 0x20,
+}
+
+// passcode scrambles s (username or password) via the Icom sequence table.
+func passcode(s string) []byte {
+	out := make([]byte, len(s))
+	for i := 0; i < len(s); i++ {
+		p := int(s[i]) + i
+		if p > 0x7f {
+			p = ((p - 0x7f) % 0x33) - 1
+			if p < 0 {
+				p = 0
+			}
+		}
+		out[i] = passcodeSeq[p&0xff]
+	}
+	return out
+}
+
+// buildLogin builds the 0x80-byte login packet: control header + username/
+// password (scrambled) at 0x40/0x50 and the app name at 0x60. The middle fields
+// (payload size, request type, inner seq, token request) are a best-effort
+// reconstruction and may need adjustment against a capture.
+func buildLogin(seq uint16, sentid, rcvdid uint32, innerSeq, tokRequest uint16, user, pass, name string) []byte {
+	b := make([]byte, 0x80)
+	binary.LittleEndian.PutUint32(b[0:], 0x80) // len
+	// type (b[4:6]) = 0x00
+	binary.LittleEndian.PutUint16(b[6:], seq)
+	binary.LittleEndian.PutUint32(b[8:], sentid)
+	binary.LittleEndian.PutUint32(b[12:], rcvdid)
+	binary.LittleEndian.PutUint32(b[16:], 0x70) // payload size (len - 0x10)
+	binary.LittleEndian.PutUint16(b[20:], 0x00) // requesttype
+	binary.LittleEndian.PutUint16(b[22:], 0x01) // requestreply
+	binary.LittleEndian.PutUint16(b[24:], innerSeq)
+	binary.LittleEndian.PutUint16(b[26:], tokRequest)
+	// token (b[0x20:0x24]) = 0 until the rig grants one
+	copy(b[0x40:0x50], passcode(user))
+	copy(b[0x50:0x60], passcode(pass))
+	nm := name
+	if len(nm) > 16 {
+		nm = nm[:16]
+	}
+	copy(b[0x60:0x70], []byte(nm))
+	return b
+}
+
 func parseHeader(b []byte) (length uint32, typ, seq uint16, sentid, rcvdid uint32, ok bool) {
 	if len(b) < 16 {
 		return 0, 0, 0, 0, 0, false
@@ -68,22 +127,18 @@ func parseHeader(b []byte) (length uint32, typ, seq uint16, sentid, rcvdid uint3
 
 func main() {
 	if len(os.Args) < 2 {
-		fmt.Println("usage: icomnettest <rig-ip> [control-port] [run-seconds]")
-		fmt.Println("example: icomnettest 192.168.1.60 50001 20")
+		fmt.Println("usage: icomnettest <rig-ip> [user] [password]")
+		fmt.Println("  <rig-ip> only          → handshake + ping probe")
+		fmt.Println("  <rig-ip> <user> <pass> → also attempt login")
+		fmt.Println("example: icomnettest 192.168.1.60 f6bgc cgb6f1")
 		os.Exit(2)
 	}
 	ip := os.Args[1]
 	port := 50001
-	if len(os.Args) >= 3 {
-		if v, err := strconv.Atoi(os.Args[2]); err == nil {
-			port = v
-		}
-	}
-	runSecs := 20
+	runSecs := 25
+	user, pass := "", ""
 	if len(os.Args) >= 4 {
-		if v, err := strconv.Atoi(os.Args[3]); err == nil && v > 0 {
-			runSecs = v
-		}
+		user, pass = os.Args[2], os.Args[3]
 	}
 
 	target := net.JoinHostPort(ip, strconv.Itoa(port))
@@ -110,6 +165,14 @@ func main() {
 	}
 
 	fmt.Printf("Probing Icom control stream at %s  (myID=0x%08X)\n\n", target, myID)
+	if user != "" {
+		fmt.Printf("Login mode: user=%q pass=%q\n", user, pass)
+		fmt.Printf("  scrambled user = % X\n", passcode(user))
+		fmt.Printf("  scrambled pass = % X\n\n", passcode(pass))
+	}
+	var innerSeq uint16 = 0x0001
+	var tokRequest uint16 = 0x1234 // fixed for reproducibility (no RNG in this probe)
+	loginSent := false
 
 	// 1) areYouThere — ask the rig to announce itself.
 	seq++
@@ -154,8 +217,15 @@ func main() {
 			logTx("areYouReady", ctrlPacket(typeAreYouReady, seq, myID, remoteID))
 			readyStarted = true
 		case typeAreYouReady:
-			if readyStarted {
-				fmt.Printf(">> iAmReady — control link is up. (Login is the next milestone.)\n\n")
+			if readyStarted && !loginSent {
+				fmt.Printf(">> iAmReady — control link is up.\n\n")
+				if user != "" {
+					seq++
+					lg := buildLogin(seq, myID, remoteID, innerSeq, tokRequest, user, pass, "OpsLog")
+					fmt.Printf(">> sending login (user=%q)\n", user)
+					logTx("login", lg)
+					loginSent = true
+				}
 			}
 		case typePing:
 			// Reply to the rig's ping: mirror the packet, swap sender/receiver IDs,