Direct Message Protocol (DMP)
DMP is an MTA to MTA protocol, and is interoperable with STANAG 4406, S4406. This allows the exchange of messages with the strategic domain. This implies that it is also possible to have multi-hop connections using different protocols on different hops. DMP is very bandwidth-efficient. This allows DMP to be used for time-critical messages even when using low-bandwidth channels (e.g. HF radio).
The DMP uses existing bearers (such as IP), and only puts moderate demands on processing power. This allows DMP to be implemented on almost any platform, including hand-helds and laptops.
The Direct Message Protocol is currently being proposed as a supplement to STANAG 4406 Annex E (see S4406).
The DMP dissector is fully functional.
(XXX add links to preference settings affecting how DMP is dissected).
Example capture file
A complete list of DMP display filter fields can be found in the display filter reference
Show only the DMP based traffic:
You cannot directly filter DMP protocols while capturing. However, if you know the UDP port used (see above), you can filter on that one.
Capture only the DMP traffic over the default port (24209):
udp port 24209
http://mmhswg.fkie.fgan.de/archive/mmhswg772.zip Direct Messaging Profile – Protocol Description - Version 1.0 - (login required).