Tag: #udp

What do DNS datagrams look like?

The structure and contents of a DNS request datagram, including the header, question section, and how to represent it in C. 2016-12-31

What are ‘protocol numbers’ in IP?

An IP packet contains a ‘protocol number’ that identifies the protocol (e.g. TCP, UDP) running over IP. The kernel uses this to determine how to handle the packet. 2016-12-23

What syscalls does a UDP server need?

The syscalls needed for a simple UDP echo server are socket, bind, recvfrom, sendto, and close. 2016-12-19

How do I write a UDP server in Go?

A UDP server that listens for packets and prints the received messages. A UDP client that sends “hello” to the server. 2016-11-17

All content copyright James Fisher.