[lwip-users] pcb's

[Eric Shufro]

Can the same pcb be used for an incoming as well as an outgoing tcp connection, or do separate pcb’s need to be created?

 

For example, I create a pcb in main, and bind it to any p and some port. When data arrives, and I want to respond to that data, should I use the same pcb in my application callback function for ‘received tcp data’?

 

Also, timers… I have read many times that they should be called from within the tcpip thread, however, how is this done without dramatically slowing the thread down using things like system timeouts (like in ucos OSTimeDly) in order to set the timeout values? You need at least one timeout for the 250ms timer right, the rest can be done by incrementing a variable n times and then firing when n times has passed. (ex: 4 times for 1 second).

 

Thanks.

 

--eric