Getting destination address for UDP packets

From: Petru Paler (
Date: Fri Jul 20 2001 - 16:55:44 EST


I'm working on a program which binds on all the available interfaces (
and listens for/replies with UDP packets.

The problem is that I need to send back responses from the same IP address that
the query arrived to, and this is not usually happening.

Example: supposing I have and aliased on the same interface, and
a query arrives on, it's mandatory that the reply packet goes out from

The question is: how do I get (from user space, if possible) the destination
IP address of an UDP packet?


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This archive was generated by hypermail 2b29 : Mon Jul 23 2001 - 21:00:14 EST