Re: [Qemu-devel] [PATCH] socket: fix blocking udp recvfrom.

[Samuel Thibault]

llyzs, le ven. 01 mars 2019 12:27:31 +0800, a ecrit:
> I believe this is because UDP packet can have 0 length payload.

Ah, right, that one makes sense indeed.

> I also found out that sometimes ioctlsocket() call can return error
> (probably caused by my unstable wifi linux driver), in which case we
> can also return immediately.

We should check for the value returned by ioctlsocket() then, otherwise
the value of n is undefined.

Samuel