Unix Network Programming by Stevens and TCP/IP Illustrated by Fall and Stevens are must reads. There are many subtleties and pitfalls in writing low level netwo

Unix Network Programming by Stevens and TCP/IP Illustrated by Fall and Stevens are must reads. There are many subtleties and pitfalls in writing low level network code and those books comprehensively cover everything. Edit: I’ve heard that the first edition of TCP/IP illustrated has considerably more readable prose, so if you’re not doing IPv6 maybe get it instead. Apparently the 2nd edition with Fall is more of a rewrite with a considerable number if technical errors so I can’t recommend it having not read it.