Concerns lwIP v1.3.2.
I have a TCP client in an embedded app and after I send the data I have
to wait for an answer.
....
netconn_write ( conn, data, size, NETCONN_NOCOPY );
TNetBuf xBuf = netconn_recv ( conn );
if ( xBuf != NULL )
{
netbuf_copy ( xBuf, mRcvBuf, csBufSize );
netbuf_delete ( xBuf );
}
This works so far. But what if the server does not answer? The
'netconn_recv' does not seem to have a time-out and the application
hangs at this point. I see there is a compiler switch
'LWIP_SO_RCVTIMEO', which is disabled by default. Is this the means to
accomplish a time-out - and what would be the time - or are there other
schemes?
There is a problem, though. Besides the TCP client there is also a TCP
server that actually should block at 'netconn_recv'. Hence I have
contradicting requirements. How to overcome this?
Thanks in advance.
Walter
_______________________________________________
Walter Saegesser
Dipl.-Ing. (FH)
R&D - Software
Business Unit IMS - Line of Business Solar Inverter
_______________________________________________
Delta Renewable Energy Systems (Switzerland) AG
Burgerfeldstrasse 19, CH-8730 Uznach SG, Switzerland
TEL: +41 (0)55 246-4140
FAX: +41 (0)55 246-4116
[email protected] <mailto:[email protected]>
www.deltaenergysystems.com <http://www.deltaenergysystems.com/>
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