Re: [lwip-users] lwip_select never returns value > 0

[pekez]

Hi Ajay,

I have just checked it. Since timeout always expires, return value of lwip_select() is always 0. Therefore no errno is set.

On 14.3.2017 13:40, address@hidden wrote:

Hi Nenad,

 

Did you check errno?

 

Regards,

Ajay Bhargav

 

 

From: pekez
Sent: Tuesday, March 14, 2017 5:51 PM
To: Mailing list for lwIP users
Subject: [lwip-users] lwip_select never returns value > 0

 

Hi people,

 

I am trying to use lwip_select in combination with lwip_recv. I have

done it like this so far:

 

FD_ZERO(&rfds);

FD_SET(new_sd, &rfds);

tv.tv_sec = 0;

tv.tv_usec = 200000;

 

if (lwip_select(new_sd + 1, &rfds, NULL, NULL, &tv) > 0)

{

     lwip_recv()

 

}

 

No matter what, timeout always exceeds. Am I doing anything wrong?

Should I include some lwip option in order to use lwip_select()?

I am using lwip v1.4.1.

 

Regards,

Nenad

 

 

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