Hi everyone,

I have currently had the need to go back to basic socket programming, and implemented a simple udp packet sender. But I realized I needed to be able to select which network interface to send the packets from.

The reason is so that one of the interfaces has vlan tagging, and I need my UDP packets to be accordingly vlan tagged. For example, one of the interfaces is eth1.200.

I did search online but havent come up with anything yet and was hoping it would be worth to post a message here .

Can anyone please help.
Thanks in advance.

Not sure to understand what you want to do. But if you need network interfaces info, use "getifaddrs" function (I'm assuming you're doing C under an unix)

1 members found this post helpful.

Oh sorry, yes I am working with C, and on linux.

Thanks a lot, I think this is exactly what I was looking for.
Saved me a lot of frustration.