non-blocking LWIP Ethernet Socket

Altera_Forum · ‎03-21-2005

Has anyone been able to setup a socket non-blocking with LWIP on uC/OS-II?

I have found that the fcntl() is not supported.

My application is using the socket as a control channel that I check every time I go through my application.

Altera_Forum · ‎03-22-2005

You are correct that there is no fcntl() for LWIP. However there is a handy ioctl which will do what you want FIONBIO.

The syntax is to set non blocking

int fred = 1;

ioctlsocket(your_socket,FIONBIO,&fred)

Simply set fred to 0 for blocking.

I've not tested this, so caveat emptor

Altera_Forum · ‎03-22-2005

Have a look at the web server example design that ships with Nios II. This uses LWIP on uCOS and the HTTP server uses non-blocking IO (for the most part) to send web content back to the client.

Altera_Forum · ‎03-29-2005

Thanks for the help.

The FIONBIO with the ioctl worked great for my code.