Tcl 8.6 ''(Oct-2010: but currently not any official release)'' has IPv6 [socket] support built in. <> Unix: http://www.unnumbered.net/~umeno/etc/tclIPv6patch.html also [ceptcl] provides ipv6 among other protocols. Windows: http://sf.net/projects/iocpsock [A Little 6to4 Calculator] This [http://groups.google.com/group/comp.lang.tcl/browse_thread/thread/130148cef9ebd956] thread hints at a couple of the challenges in getting Tcl's high-level socket programming interface right. ---- [Stu] 2009-06-17 I noticed that [Ceptcl] wasn't mentioned in that thread, I wonder why. I'd post this to the thread itself but my 'net conn's sporadic lately. ---- [Steve Bennett] '''22 Oct 2010''' notes that [Jim] Tcl has support for IPv6 '''and''' udp sockets. <> Internet