ROHC Library Wiki

For versions >= 1.7.0 of the library only

The ROHC stats application makes it easy to gather some (de)compression statistics from one network flow (in PCAP format). The tool outputs statistics in CSV format with the following tab-separated fields:

• keyword 'STAT'
• packet number
• context mode (numeric ID)
• context mode (string, no whitespace)
• context state (numeric ID)
• context state (string, no whitespace)
• packet type (numeric ID)
• packet type (string, no whitespace)
• uncompressed packet size (bytes)
• uncompressed header size (bytes)
• compressed packet size (bytes)
• compressed header size (bytes)

Once the ROHC library and tools are installed, get some more help with:

 $ man rohc_stats

or:

 $ rohc_stats --help

A helper shell script is also provided to generate an HTML page with pretty graphs on it:

 $ ./rohc_stats.sh network_flow.pcap ./network_flow_stats/
 $ firefox ./network_flow_stats/index.html

Additional informations:

• Use for testing/debug only, it was not designed for production at all.
• Developed in the app/stats/ sub-directory of the library source code.
• License: same as ROHC library