Design and implementation of a TCP/IP stack for geekos operating system

GeekOS is a tiny and simple operating system that was designed at the University of Maryland to show undergraduate students the fundamentals of operating systems. GeekOS was implemented and extended as a senior project at Anadolu University in 2006, and the new kernel was named OSman. While preserving the basic functionality available in GeekOS, OSman incorporates additional features such as multi-programming support, VESA graphics device driver, and a PCI Device Driver System Base.Despite having many nice features, the current version of OSman lacked crucial networking support. The goal of this thesis was to add a sample Ethernet device driver and a TCP/IP Protocol stack implementation so that networked applications can be deployed in a machine running OSman. Realtek RTL8139 is used as the network interface card (NIC) for this thesis, and a standards-compliant, five-layer TCP/IP protocol stack is implemented on top of the designed device driver.To demonstrate the capabilities of the developed Ethernet device driver and the TCP/IP, a popular client-server network game called tic-tac-toe is implemented. This game shows the communication between two computers one running OSman and the other running in Windows XP.