Introduction

The ROHC library provides an easy and robust way for applications to reduce their bandwidth usage on network links with limited capacity. Headers of network packets are compressed with the ROHC protocol and algorithms.

RObust Header Compression (ROHC) is a set of standards defined by the IETF. The ROHC library is a free, opensource and efficient implementation of them. The list of features implemented is available on a separate page: Library features

Official website: http://rohc-lib.org/
Project page on Launchpad: https://launchpad.net/rohc
Mailing list: rohc@lists.launchpad.net
Mailing list archives: http://lists.launchpad.net/rohc/
Bugtracker: http://bugs.launchpad.net/rohc

License

The project is licensed under LGPL2.1+. See the COPYING and AUTHORS files for more details.

Libraries

The sources are in the src subdirectory. The sources are separated into three libraries:

a library that contains the routines used for both the compression and the decompression processes
a library that handles the compression process
a library that handles the decompression process

See the INSTALL file to learn to build the libraries.

API documentation

The APIs for ROHC common, compression and decompression are available on separate pages:

Tests

Several tests may be run to check the library behaviour. See the INSTALL file to learn how to use these tools.

References

RFC 3095: ROHC: Framework and four profiles: RTP, UDP, ESP, and uncompressed.
RFC 3096: Requirements for robust IP/UDP/RTP header compression.
RFC 3843: ROHC: A Compression Profile for IP.
RFC 4019: ROHC: Profiles for User Datagram Protocol (UDP) Lite.
ROHC library: The Open Source ROHC library described by the documentation you are currently reading.
ROHC Linux: A GPL-licensed implementation of ROHC over PPP for the 2.4 Linux kernel. The ROHC library started as a fork of this project.