I've got a router that generates tomato_cstats and tomato_rstats files (Asus RT-N66U running asuswrt-merlin). I'd like to set up logrotate or something to gather them every reset period and then I can scp them to my desktop where I can store and analyze them. Anyway, what I'm really looking for is some software to not just read but graph these files visually. Like instantaneous bandwidth per IP over time, total bandwidth per IP per day, that kind of thing. Does this exist? If it doesn't exist, what resources will I need to write it? I know Python but how do you parse these files?