Enhance error display with raw data for packets with decode errors

decoder/formatter.go

@@ -743,6 +743,58 @@ func FormatDecodedPacket(packet *DecodedPacket) string {
 
 	if packet.DecodeError != nil {
 		builder.WriteString(fmt.Sprintf("Error decoding packet: %v\n", packet.DecodeError))
+		
+		// Show raw data in different formats for debugging
+		if packet.RawData != nil && packet.RawData.GetPayload() != nil {
+			rawData := packet.RawData.GetPayload()
+			builder.WriteString(fmt.Sprintf("Raw data (%d bytes):\n", len(rawData)))
+			builder.WriteString(fmt.Sprintf("  Hex: %x\n", rawData))
+			
+			// Show binary representation
+			builder.WriteString("  Binary: ")
+			for i, b := range rawData {
+				if i > 0 && i%8 == 0 {
+					builder.WriteString(" ")
+				}
+				if i > 0 && i%32 == 0 {
+					builder.WriteString("\n          ")
+				}
+				builder.WriteString(fmt.Sprintf("%08b ", b))
+				
+				// Limit to first 32 bytes for binary representation
+				if i >= 31 {
+					builder.WriteString("...\n")
+					break
+				}
+			}
+			
+			// Show as text if it might be displayable
+			if IsASCII(rawData) {
+				builder.WriteString(fmt.Sprintf("  Text: %s\n", string(rawData)))
+			}
+		} else if packet.RawPacket != nil && packet.RawPacket.GetEncrypted() != nil {
+			// Show raw encrypted data if available
+			encData := packet.RawPacket.GetEncrypted()
+			builder.WriteString(fmt.Sprintf("Raw encrypted data (%d bytes):\n", len(encData)))
+			builder.WriteString(fmt.Sprintf("  Hex: %x\n", encData))
+			
+			// Show as text only if it looks like ASCII (rare for encrypted data)
+			if IsASCII(encData) {
+				builder.WriteString(fmt.Sprintf("  Text: %s\n", string(encData)))
+			}
+		} else if packet.Payload != nil {
+			// If we have a payload but an error occurred during decoding
+			if data, ok := packet.Payload.([]byte); ok {
+				builder.WriteString(fmt.Sprintf("Raw payload (%d bytes):\n", len(data)))
+				builder.WriteString(fmt.Sprintf("  Hex: %x\n", data))
+				
+				// Show as text if it might be displayable
+				if IsASCII(data) {
+					builder.WriteString(fmt.Sprintf("  Text: %s\n", string(data)))
+				}
+			}
+		}
+		
 		return builder.String()
 	}
 
@@ -1007,4 +1059,4 @@ func FormatTopicAndRawData(topicInfo *TopicInfo, payload []byte) string {
 	builder.WriteString(fmt.Sprintf("Raw Data (%d bytes): %x\n", len(payload), payload))
 
 	return builder.String()
-}
+}