Kernel module to get network jitter and bandwidth?

Question

I need to get a list of interfaces on my local machine, along with their IP addresses, MACs and a set of QoS measurements ( Delay, Jitter, Error rate, Loss Rate, Bandwidth)...

I'm writing a kernel module to read these information from local network devices,So far I've extracted every thing mentioned above except for both Jitter and Bandwidth...

I'm using linux kernel 2.6.35

Answer 1

It depends what you mean by bandwidth. In most cases you only get from the PHY something that is better called bitrate. I guess you rather need some kind of information on the available bandwidth at a higher layer, which you can't get without active or passive measurements done, e.g. sending ICMP echo-like probe packets, and investigating replies. You should also make clear what the two points in the network are (both the actual endpoints and the communication layer) between which you would like to measure available bandwidth.

As for jitter you also need to do some kind of measurements, basically the same way as above.