All of these were last updated from the iproute2 source around 2016-04-13. The software version at that time was version iproute2-4.5.0.
The iproute2 suite is the Linux-specific command-line toolkit for interacting with the kernel data structures which run the networking stack. The toolkit allows address and route enumeration, statistics gathering, traffic control management and, of course, configuration.
IP Command Reference
Another introductory text by somebody trying to dive into the Linux traffic control subsystem, specifically, focusing on the tc filter command.
QoS in Linux with TC and Filters
These are some other little utilities hidden deep in the back of the Linux closet. They are abstruse and might even be defunct.