rohc

how does the compressed header look like

Asked by Devaraju

how does the compressed header look like.
Eg: TCP/IP header contents after applying compression and the explanation on the fields available after compression

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Didier Barvaux (didier-barvaux) said : 		#1

Hello,

There is no single answer to your question. The ROHC protocol is a stateful protocol with different ways to compress packets according to several parameters: operation mode, compression profile, context state, W-LSB parameters...

You may find all packet formats for the TCP profile starting at the middle of page 80 of RFC 6846: https://tools.ietf.org/html/rfc6846#page-81

You may also see some of those packet formats in some packet captures in the library sources. For example: http://bazaar.launchpad.net/~didier-barvaux/rohc/main/view/head:/test/non_regression/inputs/ipv4/tcp/rohc_wlsb4_smallcid.pcap

Regards,
Didier

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