Re: [lwip-users] problem with TCP connect Calback

[Sergio R. Caprile]

Erh... the other end not accepting ?
Do you have a traffic capture you can post ?
I guess you are using the RAW API.
Have you properly registered your callback ?
(1)The error callback will eventually be called when the connection 
attempt times out, is it ?
Are you able to debug ? In case you see there is a SYN+ACK from the 
other end, that frame will arrive to your hardware, be read by your 
driver, delivered to lwIP and eventually to your application (Don't know 
for sure if the SYN+ACK by itself will generate that immediately). You 
can (at least for a start) enable debugging and trace it. If there is no 
SYN+ACK... then (1)

I see in another post of yours that you say that it works when you 
configure your device as master. Do you actually know what you are 
doing, right ? You do know that it takes a client (connects) and a 
server (waits for connections) for a connection to take place, do you ? 
That is... You do have a proper server on the other end, do you ?

Then there is the possibility that either your driver or your port are 
not doing things right. You should have validated both by running 
known-to-work applications from the app dir or the contrib tree.
And please let us know which API you are using, your NO_SYS, your 
version, etc.