----- Original Message -----
From: "Phil Mayers" <p.mayers@imperial.ac.uk> To: twisted-python@twistedmatrix.com Sent: Friday, December 13, 2013 8:41:44 PM Subject: Re: [Twisted-Python] Reliable way to check if Twisted has IPv6 support?
On 13/12/13 03:22, Amit Saha wrote:
Is there a more reliable way (which works with the Twisted-8.0+) to check this?
Check the Twisted version.
You should also note that IPv6 features have appeared in multiple versions; HostnameEndpoint was added in 13.2.0 for example, whereas basic "connectTCP to IPv6 address" was added in 12.1.0, with listenTCP in 12.0.0
So:
import twisted
vt = (twisted.version.major, twisted.version.minor)
if vt > (13,2): def connectv6name(n): return HostnameEndpoint(...) elif vt > (12,1): def connectv6name(n): d = myGetAddrInfo(...) d.addCallback(reactor.connectTCP, ...) else: def connectv6name(n): raise Exception('twisted too old for IPv6')
Thanks a lot, Phil. I think using the version information is a more reliable way. I had a feeling that the various bits and pieces may have been added incrementally. The functionality I need present are listenTCP() and connectTCP() to work with IPv6, so I think checking for 12.1.0 will suit my needs. Best, Amit. -- Amit Saha <http://echorand.me>