Hi,
Thank you, nice job on porting the code!

I'm interested in how you implemented the dynamic variables. It's been quite some time since I worked on this code but last time I did work on it (back in January) I went of on a tangent starting to implement a subset of the Microchip File System for storing the webpage content in external flash instead of in the PIC. Geez, can't even remember where I left off....

So, your two questions:
a) The code should work for multiple sockets. I've not used it for multiple connections to a web-server but I've had one socket to DHCP, one socket DNS, one socket SNTP and one socket SMTP - at the "same" time.
I don't think you should open all socket in listen mode at the same time though. If your device is acting as a server to serve up the web-page (or webpages) then you open a socket (say socket 0) and wait for a connection. When you get a connection on socket 0 you can open a second socket and wait for a connection on IT. That's probably how I'd try it as a start.

b) Sure, go ahead! (Thank you for asking, I appreciate that!) If you build upon the code and post in the Proton forum perhaps there are ideas and implementations I can "convert back" into the PBP code and so on. That was kind of the idea of this thread from the start - to build a base or "framework" (popular word) for the W5100 which others could build "applications" around (web-server, emailer, twitter client etc). Obviously I would've preferred if you did it in PBP but you can't have it all ;-)

If you do put something up please send me a link!

Damn, now you resparked my interest in this... I even got a couple of WIZ820IO with the (now no longer brand new) W5200 chip that I was going to implement in the same code. Too many projects...

/Henrik.