Thread: IPv6 detection

The IPv6 patch currently checks for the function getaddrinfo() and the
include file netinet/ip6.h.

Is this a sufficient test?  Anyone with/without IPv6 that does match
not this test?

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
359-1001+  If your life is a hard drive,     |  13 Roberts Road +  Christ can be your backup.        |  Newtown Square,
Pennsylvania19073
 

Bruce Momjian writes:

> The IPv6 patch currently checks for the function getaddrinfo() and the
> include file netinet/ip6.h.

getaddrinfo() has nothing to do with IPv6, and netinet/ip6.h isn't
included anywhere, so why check for it?

I believe we would need to check for a combination of

getaddrinfo()
inet_ntop()/inet_pton()
AF_INET6
struct sockaddr_in6

Then again, it might be simpler to make it a configure option
(--enable-ipv6) and just assume all those things exist.  Over time the
interfaces might stabilize.

However, even when IPv6 support is compiled in, we still need some
run-time control about whether it should get activated because the
presence of the programming interfaces doesn't tell you anything about
whether the run-time environment supports it.

-- 
Peter Eisentraut   peter_e@gmx.net

Peter Eisentraut wrote:
> Bruce Momjian writes:
> 
> > The IPv6 patch currently checks for the function getaddrinfo() and the
> > include file netinet/ip6.h.
> 
> getaddrinfo() has nothing to do with IPv6, and netinet/ip6.h isn't
> included anywhere, so why check for it?
> 
> I believe we would need to check for a combination of
> 
> getaddrinfo()
> inet_ntop()/inet_pton()
> AF_INET6
> struct sockaddr_in6
> 
> Then again, it might be simpler to make it a configure option
> (--enable-ipv6) and just assume all those things exist.  Over time the
> interfaces might stabilize.
> 
> However, even when IPv6 support is compiled in, we still need some
> run-time control about whether it should get activated because the
> presence of the programming interfaces doesn't tell you anything about
> whether the run-time environment supports it.
> 

I changed the check for sockaddr_in6, rather than ip6.h.  Let's see how
that works.  I would like to have this automatic rather than adding yet
another configure flag.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
359-1001+  If your life is a hard drive,     |  13 Roberts Road +  Christ can be your backup.        |  Newtown Square,
Pennsylvania19073