Re: [lwip-devel] PPP single threaded

[Simon Kallweit]

Erik Ekman wrote:
> Yes, it sounds interesting! Usually when doing PPP over the serial
> link one needs to handle things like the modem/GPRS module saying NO
> CARRIER. Right now I have separate code that checks for this and then
> storing other data in a buffer that PPP reads from. Do you run sio_*
> functions directly to the serial port?
>   

The 'chat' module can be used to do the initial link negotiation. 
Currently this is used standalone, but I think I'll integrate it into 
PPPoS, so it can be done automatically. I use the sio_xxx interface yes, 
but I think the interface should be extended to support proper 
opening/closing as well as configuration of the blocking mode. In a 
polled single-threaded environment, reading must be non-blocking, while 
writing should be blocking. If we look for an implementation that will 
work in both single and multi-threaded environment, this should be extended.

Simon