Netflow v9 source_id

[fredbcode]

Hello,

I'm trying to debug Netflow V9 from CISCO without source_id value
The goal is to add IP source (router who generates flow) to the source_id https://netflow.caligare.com/netflow_v9.htm before duplication.

This can be very useful to find the source device
Any advice on how to do this would be greatly appreciated

For now I'm trying to see the buffer without any success
https://github.com/sleinen/samplicator/blob/master/samplicate.c#L346

I added this right after
if (n > 0) { fpdu[n] = '\0'; printf("Test received message: %s size: %ld\n", fpdu, sizeof (fpdu) ); }

But fpdu message is always empty (size not of course), I don't understand why
I guess there is something specific here, a basic client/server UDP test works well

I guess that show the socket data can also be very interesting for debugging purpose in many cases

Thanks