ROHC compression/decompression library Documentation

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: http://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 GPL2+. 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:

• ROHC compressor/decompressor common API
• ROHC compression API
• ROHC decompression API

Non-regression tests

The test subdirectory contains several test applications. See the INSTALL file to learn how to use these tools.

References

RFC 3095	RObust Header Compression (ROHC): Framework and four profiles: RTP, UDP, ESP, and uncompressed. http://www.ietf.org/rfc/rfc3095.txt
RFC 3096	Requirements for robust IP/UDP/RTP header compression. http://www.ietf.org/rfc/rfc3096.txt
RFC 3828	The Lightweight User Datagram Protocol (UDP-Lite). http://www.ietf.org/rfc/rfc3828.txt
RFC 3843	RObust Header Compression (ROHC): A Compression Profile for IP. http://www.ietf.org/rfc/rfc3843.txt
RFC 4019	RObust Header Compression (ROHC): Profiles for User Datagram Protocol (UDP) Lite. http://www.ietf.org/rfc/rfc4019.txt
ROHC library	The Open Source ROHC library described by the documentation you are currently reading. http://launchpad.net/rohc
ROHC Linux	A GPL-licensed implementation of ROHC over PPP for the 2.4 Linux kernel. The ROHC library is mainly based on this software. http://rohc.sourceforge.net/
UDP-Lite	An UDP-Lite implementation for the Linux kernel. http://www.erg.abdn.ac.uk/users/gerrit/udp-lite/