mTCP is a set of TCP/IP applications for personal computers running PC-DOS, MS-DOS, FreeDOS, and other flavors of DOS. The applications include a DHCP client, FTP client and server, HTTP getter and server, IRC client, netcat implementation, network drive share client, ping utility (natch), packet sniffer, SNTP client, and telnet client.

mTCP runs on all variants of DOS including IBM PC-DOS, Microsoft MS-DOS, DR-DOS and FreeDOS. All of these applications will run well on the oldest, slowest PC that you can find - I routinely use them on an IBM PCjr made in 1983 because nothing beats the fun of putting a 39 year old computer on the Internet.

People are using mTCP for goofing off and for real work. If you have a DOS machine that needs to send data across the network mTCP can help you get that done. Besides its utility to vintage computers I have heard of people using it to transfer lab data from dedicated industrial PCs, allowing backups to be run on old machines, and sending sales reports from the branch offices of a retail store to a central server.

Don't have a vintage computer laying around? No problem! mTCP applications will run in a variety of virtual and emulated environments. It has been tested with modified DOSBox builds, VirtualBox, VMWare, and QEMU. See the documentation for the details.

mTCP applications should work on any IBM PC compatible personal computer running DOS. To be more specific, an IBM PC compatible with an 8088 or better CPU, 96KB to 384KB of system memory depending on the application, DOS v2.1 or newer, and a network interface that has a packet driver like NDIS or ODI.

PyTCP is an attempt to create fully functional TCP/IP stack in Python. It supports TCP stream based transport with reliable packet delivery based on sliding window mechanism and basic congestion control. It also supports IPv6/ICMPv6 protocols with SLAAC address configuration. It operates as user space program attached to Linux TAP interface. As of today stack is able to send and receive traffic over Internet using IPv4 and IPv6 default gateways for routing.

This program is a work in progress and it changes on daily basis due to new features being implemented, changes being made to already implemented features, bug fixes, etc. Therefore if the current version is not working as expected try to clone it again the next day or shoot me an email describing the problem. Any input is appreciated. Also keep in mind that some features may be implemented only partially (as needed for stack operation) or they may be implemented in sub-optimal or not 100% RFC compliant way (due to lack of time) or last but not least they may contain bug(s) that i didn't notice yet.

A Python module which makes it easy to write software which creates and parses TCP/IP traffic.

Ostinato aims to be the equal and opposite package to Wireshark, which is to say it is a simple, easy to use (if you know networking, that is) packet generator which lets you construct packets from the physical layer all the way up into individual applications. Can also load, edit, and replay on the wire the contents of PCAP files.