Re: [lwip-users] Assert on netconn_write: "already writing or closing"

[Marco Jakobs]

Hi Simon,

 

then i have misunderstand how to do it … i thought non-blocking is the precondition to use a sendtimeout.

 

Can I find an explanation somewhere?

 

Basically I want that a netconn_write on a TCP connection times out and returns after a configurable time with an error instead blocking the task for a certain long time. What would you suggest how to realize this?

 

Marco

 

From: address@hidden [mailto:address@hidden On Behalf Of Simon Goldschmidt
Sent: Friday, February 01, 2013 6:34 AM
To: Mailing list for lwIP users
Subject: Re: [lwip-users] Assert on netconn_write: "already writing or closing"

 

"Marco Jakobs" wrote:

 just noticed that i'll get the assert above if i access my hardware from outside. The scenario:

 

A telnet command "help" will write 2 pages of text data over a TCP connection, so some packets will be needed for this. The TCP connection is non-blocking and has a sndtimeout value of 10.

 

Non-blocking and send-timeout are two different ways of achieving roughly the same thing. Mixing these might not be fully tested. But I don't think a send-timeout makes sense on a non-blocking socket, anyway.

 

Simon