"T/TCP for Linux" has seen major updates during the last one month:
1) A new mirror site opened at http://ttcplinux.tripod.com
The project home is still at http://ttcplinux.sourceforge.net
Sock is a network program written by W. Richard Stevens. It can
be used both as a client and as a server and can send both TCP and
Tcpdump is originally written by Van Jacobson, Craig Leres and
Steven McCanne, all of whom come from Lawrence Berkeley Laboratory.
Tcpdump sets the network interfaces in "promiscuous" mode to sniff
every packet received by the interfaces. Tcpdump-3.3 is able to
print out CC, CC_NEW and CC_ECHO options introduced by T/TCP.
SSH_tunnel is a perl script. If you are using ssh behind a firewall
or a proxy, you can use this script to direct your ssh traffic through
3) "Join us"
If you are interested, you can join as an end-user, andience or developer.
You will see how to do so on this page.
This is the part that has seen most drastic updates. There have been about
20 flowgraphs to outline TCP/IP stack in an easy manner or describe methods
call sequence in details. You can browse the docs online or download a zipped
version at http://prdownloads.sourceforge.net/ttcplinux/Docs_2_4_2.zip.
All the documents are divided into six parts:
Part one: Linux Kernel TCP/IP Stack Analyses
You will see everything, from mostly involved structures to all the methods
called during the sending and receiving process and state transition graph,
that are both important and foundamental. Anyone that is interested in the
understanding of TCP/IP stack of Linux kernel can find useful information
Part two: Introduction to T/TCP defined in RFC 1644
Here you see detailed introductions to T/TCP, eg. what modifications does
bring to standard TCP?
Part three: Design and Implementation Approach
This part is the longest one. It's about implementation approaches. Lies
answer to "How T/TCP add new functions to TCP with being able to fall back to
TCP automatically or manually?"
Part four: Known Problems with T/TCP defined in RFC 1644
T/TCP has been around for some time. But it's been rejected for its serious
problems. A detailed breakdown of those problems and "crack methods" are
here. Maybe the biggest mission of "T/TCP for Linux" is to handle the
problems and come up with a new RFC. Of course, with the necessary
each of you around.
Part five: Current Patches Performance Testing Information
Part six: Current Patches Debugging and Fixing Information
These two parts are not started since the debugging process have yet
will be updated lively on these two parts.
If you have any comment or question, contact us. Email addresses can be
the contact page. Or, simply post to our mailing lists and forum. We'll try
to give instant replies.