Re: [lwip-users] Detect RST when using non blocking read.

[Simon Goldschmidt]

"Karlsson, Johnny" <address@hidden> wrote:
> There doesn't seem to be a way to detect that a remote host sends a RST
> message when using non blocking read.

That doesn't depend on blocking or nonblocking, it's the way the socket API is 
defined. When a receive function returns:
- 0, the remote host closed the connection
- >0, data was received,
- <0, there has been an error. To find out which error, you have to look at the 
global variable 'errno'. E.g. for a receive timeout on a nonblocking socket, 
this would be 'EAGAIN'.

Also, this is not lwIP specific but generally valid for sockets.

Simon
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