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SubjectRe: Issue with iwd + Linux 5.8.3 + WPA Enterprise
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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

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