This video is part of a series of live streams where I explore the world of open source code. Every day I pick an unfamiliar code base and try to figure out what's going on in it. In this live stream, I take a look at the source code for the Linux IPv4 TCP stack that basically runs the internet. Some of my related videos: - Let's read the Linux kernel source code: https://www.youtube.com/watch?v=C43VxGZ_ugU - Let's read the gRPC source code: https://www.youtube.com/watch?v=pXKOsSwutLU Useful links: - Code: https://github.com/torvalds/linux/tree/master/net - TCP header file: https://github.com/torvalds/linux/blob/master/include/net/tcp.h - TCP standard: https://www.ietf.org/rfc/rfc9293.html - Old-school 1981 DARPA standard: https://www.rfc-editor.org/rfc/rfc793 - What the heck is congestion control?: https://www.youtube.com/results?search_query=understanding+tcp+flow+and+congestion+control Known Errors: - Around 18:34, I confuse the shift-left and shift-right bitwise operators.