Hello, On Fri, 17 Jan 2025 at 19:13, Brandon Martin <lists.na...@monmotha.net> wrote: > > Does anyone know of a good way to simulate oddball TCP happenings like: > > * Out of order delivery > * Variable delivery delays
I would suggest to take a look at linux tc-netem > * (Especially) Unusual segmentation e.g. splitting part of a stream that > would and should normally be sent in a single segment into several > smaller segments sent back-to-back > > And especially doing so with traffic from an existing TCP-speaking > application i.e. something like a TCP proxy that lets you deliberately > mess with the segmentation and delivery order. This is more difficult because a TCP proxy (as in a userspace application) does not do the TCP segmenting, the kernel does. Sure the application may set flags like TCP_NODELAY to toggle Nagle, but beyond that the application has not really control over TCP segmentation. So a tool like this would basically need to reimplement TCP in userspace. Not sure something like this is out there. Lukas
