Re: Issue with iwd + Linux 5.8.3 + WPA Enterprise

[Denis Kenzior]

Hi Herbert,

On 8/26/20 9:19 AM, Herbert Xu wrote:
> On Wed, Aug 26, 2020 at 08:57:17AM -0500, Denis Kenzior wrote:
> > I'm just waking up now, so I might seem dense, but for my education, can you
> > tell me why we need to set MSG_MORE when we issue just a single sendmsg
> > followed immediately by recv/recvmsg? ell/iwd operates on small buffers, so
> > we don't really feed the kernel data in multiple send operations.  You can
> > see this in the ell git tree link referenced in Andrew's reply.
>
> You obviously don't need MSG_MORE if you're doing a single sendmsg.
>
> The problematic code is in l_cipher_set_iv.  It does a sendmsg(2)
> that expects to be followed by more sendmsg(2) calls before a
> recvmsg(2).  That's the one that needs a MSG_MORE.

Gotcha.  I fixed the set_iv part now in ell:
https://git.kernel.org/pub/scm/libs/ell/ell.git/commit/?id=87c76bbc85fe286925cbdb53d733fc9f9fd2ed12

Regards,
-Denis