Option to show used IP source address in output

[realsimix]

Hi,

I'm asking for an option to show the source address used when running fping.

While it's possible to define a source address/interface, it would be interesting to know which source address is used when no source is specified. As the pings always go between two IP addresses, I would like to know which source is used.

Could such an option be added? That would be very nice!

Thanks,
Simon