Send multiple datagrams using a single send() call?

Question

When datagram-based socket (raw socket or UDP) is used with gather-style send, all the data are concatenated to form a single IP packet. Is there a way to send several datagrams using a single call?

Answer 1

The call you are looking for is sendmmsg() however it is not yet implemented or even up for much discussion. You can see it's receive side twin recvmmsg() in the latest 2.6.3 Linux kernel.