Reliable, efficient transmission control for networks that suck.

Airhook is a reliable data delivery protocol, like TCP. Unlike TCP, Airhook gracefully handles intermittent, unreliable, or delayed networks. Other features include session recovery, queue control, and delivery status notification.

Inspired by life with CDPD, Airhook works well in environments that leave TCP gasping for air.

Warning: Airhook is a defunct project, no longer maintained, never really implemented properly in the first place. The idea doesn't even really make sense any more -- modern wireless networks are much faster and include link level retransmission and congestion control. This page is kept here for historical reference purposes only.


An implementation of the Airhook protocol is available as an ANSI C library suitable for use with any network transport and operating system. Included with the library are Unix utilities to proxy TCP via Airhook over UDP, so you can use protocols like HTTP and SSH with Airhook.

Implementation source code is available (tarballs, CVS) under the terms of the GNU General Public License.

Library documentation and a protocol reference are available online.


Airhook is best described by comparison with TCP.


Dan Egnor