IGMPv3 Source Filters via Bash

cors · 07-01-2019, 08:04 AM

Hello,

I'm trying to write a test to probe the kernel for registered IGMPv3 source filters.

Code:

/proc/net/igmp

shows the joined multicast groups, but not set source filters. I've come across a standard library call

Code:

getsockopt()

to do the job, but I won't be able to build upload a custom binary to the platform, or install some external linux package for this job.

Does anyone know whether I can check the set IGMPv3 source filters from a file or a simple bash command?

Thanks in advance.

scheidel21 · 07-13-2019, 08:14 PM

How are the source filters configured on Linux in the first place? I did a lot of looking and I can't even seem to find a way to do it outside of code that your then have to compile. But whatever you do to set it should also allow you to retrieve it.