How to do TOS/DSCP in ruby?

Question

How does one set the TOS flags/DSCP flags in Ruby on a UDP/TCP stream (preferably using the Ruby/Sockets library)?

Answer 1

Try Socket#setsockoption(). Its documented in Appendix A of the pickaxe book, or you can browse the source for interface details.

-- MarkusQ

Answer 2

You can set the TOS flags with Socket#setsockopt passing IPPROTO_IP as the level, IP_TOP as the name of the option, and your desired value:

require 'socket'
s = TCPSocket.new('example.com', 80)
s.setsockopt(Socket::IPPROTO_IP, Socket::IP_TOS, YOUR_TOS_VAL)