I'm trying to get Racket to listen on an IPv6 port, but I can only get it to work with IPv4.
> (tcp-listen 8080 5 #t) I would expect this to listen on both IPv4 and IPv6 but lsof shows it's only listening on IPv4. Specifying an explicit IPv6 address doesn't work at all: > (tcp-listen 8080 5 #t "::") tcp-listen: host not found: :: (Unknown host; errno=1) > (tcp-listen 8080 5 #t "2001:1938:81:1f8::2") tcp-listen: host not found: 2001:1938:81:1f8::2 (Unknown host; errno=1) Specifying a name that resolves to the IPv6 address of my local host doesn't work: > (tcp-listen 8080 5 #t "ipv6.nlanguages.com") tcp-listen: host not found: ipv6.nlanguages.com (No address associated with name; errno=4) My machine is running IPv6, ifconfig shows that IPv6 address, the name resolves, and I can listen on an IPv6 port with Python, so my IPv6 setup seems to be okay. I've tried MzScheme v4.1.2 and Racket v5.1 on two different Linux machines without success. (Strangely, tcp-listen works fine with IPv6 on Windows.) Is there some mzscheme flag necessary to use IPv6? Or do I need some obscure Linux name resolution configuration change? I've looked at the mzscheme documentation and even the racket/src/network.c source code, and I can't figure this out. Thanks for your help, Ken _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users