On Tue, 1 Oct 2002, Ben Greear wrote:
> get my pktgen and send-to-self code cleaned up, I am planning to start
> working on making UDP reliably send packets, or return an error to
> the calling code. I will, of course, keep you informed if I actually
> get something working...
If you want realibility then thats what TCP is for.
I am curious why you would even want to retransmit a voice packet or
why a local drop should be treated any different from a remote/network
drop in a voice application ...
When you fail in sendto/sendmsg, errno is set to ENOBUFS as long as you
set IP_RECVERR in the socket options; you can also receive ICMP errors
as described in the manpages (use a msg_control buffer and call recvmsg
with MSG_ERRQUEUE).
BTW, a good sample of an app that makes good use of ENOBUFS to do
congestion control, IP_RECVERR and MSG_ERRQUEUE is the ping app in Alexeys
iputils package. Why did i not remember all this before chasing the
phantom with Eric is an indication i need to increase my cafeine
consumption.
cheers,
jamal
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