Re: UDP recvmsg blocks after select(), 2.6 bug?

Joris van Rantwijk
2004-10-06T20:58:40Z

On Wed, 6 Oct 2004, Andries Brouwer wrote:
> Does this really happen?

Yes. Finally got my raw-udp-with-wrong-checksum sending program to work
over localhost and it hangs recvfrom pretty good.

> All kernel versions?

Quick guess: probably since late 2.4. Source of 2.4.27 udp.c is similar to
2.6.9, but 2.4.17 returns EAGAIN even for blocking sockets, apparently
this was "fixed" later on.

> Is this the explanation for the reported behaviour?)

Very hard to say since I can't predict when it will occur again.

Joris.