User Manual Part 2
Table Of Contents
- 7. Recording Options
- 8. Display Options
- 9. Reading a CATC Trace
- 10. Decoding Higher Protocols
- 10.1 Introduction
- 10.2 LMP and L2CAP Messages
- 10.3 Decoding and Viewing Higher Protocol Data
- 10.4 Tooltips
- 10.5 Viewing Packets in LMP and L2CAP Messages
- 10.6 Types of LMP and L2CAP Messages
- 10.7 Viewing L2CAP Channel Connections
- 10.8 Viewing Protocol Messages and Transactions
- 10.9 Changing Protocol Assignments
- 11. Other Features
- 12. How to Contact CATC
- 13. Warranty and License
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Merlin Protocol Analyzer User’s ManualCATC Version 1.6
10.5 Viewing Packets in LMP and L2CAP Messages
LMP and L2CAP Messages can be "opened" to reveal
their constituent packets by double-clicking the first
cell in of the message or clicking once on the small
arrow on that same cell. The packets will then display below the message.
The following screenshot shows an example of a message and its packets.
10.6 Types of LMP and L2CAP Messages
If you scroll through a trace, you will see three kinds of message:
• LMP Signalling Message
• L2CAP signalling Message
• L2CAP Data Transfer Message
Each message has the same basic message header but differs in its payload.
Message
Packets
making up
the
message
LMP Signalling Message
L2CAP Signalling Message
L2CAP Data Transfer Message
Payload
Payload
Header
Payload
Header
Header