Re: IPv6 patch - Mailing list pgsql-hackers

Another idea is to have the -i take an optional argument.  Something where
-i means bind to both v4 and v6, and -i4 means to only v4, and -i6 to only
v6.  

I am guessing that most people will want to bind to both when they
just specify -i, which is what is usually suggested when they want to get
the box up and running.

If they want do something fancy, like only bind to v6, then they will read
the docs and see that they can do that with something like -i6.
-rocco

On Tue, 7 Jan 2003, Bruce Momjian wrote:

> 
> You mean ship with only IPv4 enabled, but not IPv6.  (Of course, both
> are enabled in the binary.)  But then what does -i do?  We currently
> tell people to use -i.  Do we need another postgresql.conf option that
> says, "If tcpip_socket is enabled, enable IPv6 too"?  But that doesn't
> work if you want _only_ IPv6.
> 
> The big problem is it doesn't mix with tcpip_socket and -i very well.  I
> am not saying I have a better idea, I am just looking for something
> clearer.  Perhaps we need a separate flag/postgresql.conf option for
> IPv6 so they can be controlled separately.  Have we figured out how to
> listen on IPv6 only?
> 
> ---------------------------------------------------------------------------
> 
> Nigel Kukard wrote:
> > 
> > IPV4 only should be shipped by default, but disabled as it is at present.
> > 
> > 
> > On Tue, 7 Jan 2003, Bruce Momjian wrote:
> > 
> > > 
> > > OK, what do we ship as a default?
> > > 
> > > ---------------------------------------------------------------------------
> > > 
> > > Nigel Kukard wrote:
> > > > Sorry i'm not subscribed to hackers, guess i must get soon!
> > > > 
> > > > 
> > > > Anyway what i think should happen is follows, if in the configuration file
> > > > we specify that it must bind to both ie. tcpip_socket = true, the server
> > > > should check if first its compiled to support ipv6 (or skip this if we use
> > > > #ifdef's) and secondly bind to what WE tell it to. If we specify TRUE it
> > > > must try to bind to both. Ok thats the first case, the second case is if
> > > > we specify ipv4, ie. tcpip_socket = 4. This should ONLY bind ipv4, not ipv6
> > > > and if there is no ipv4 support on the box it should fail, not fallback.
> > > > And finally the third case, if we specify   tcpip_socket = 6, we should
> > > > again ONLY bind to ipv6, if there is no ipv6 support compiled, or if we
> > > > cannot bind to the specific interface we should fail.
> > > > 
> > > > Thats my opinion ;)
> > > > 
> > > > 
> > > > -Nigel
> > > > 
> > > > 
> > > > 
> > > > On 6 Jan 2003, Robert Treat wrote:
> > > > 
> > > > > On Mon, 2003-01-06 at 16:40, Bruce Momjian wrote:
> > > > > > Peter Eisentraut wrote:
> > > > > > > Bruce Momjian writes:
> > > > > > The issue is that right now, there isn't any special IPv6 enabling,
> > > > > > except for lines in pg_hba.conf.  I think it is fine to add some
> > > > > > enabling, but we then have an additional user interface issue.  One idea
> > > > > > I had was to change tcpip_socket from true/false to true/false/4/6 so
> > > > > > you can specify if you want none(false)/4/6/both(true).  The original
> > > > > > patch author wants this functionality too, so there clearly is a need
> > > > > > for this.  This doesn't play nice with the -i flag, however.
> > > > > >
> > > > > 
> > > > > Would there a downside to specifying both (enabling ipv6) on a machine
> > > > > that doesn't support it? If not I'd suggest making -i equivalent to
> > > > > tcp_ip_socket = true. I don't think it's too much to ask people to use
> > > > > the preferred method to obtain maximum functionality.
> > > > >  
> > > > > > Also, keep in mine my BSD/OS has libraries to support IPv6, but IPv6
> > > > > > isn't enabled in the kernel, so there is a case where HAVE_IPV6 is true,
> > > > > > but when run, opening an IPV6 server fails and I fall back to IPv4 ---
> > > > > > just throwing that out as a data point.  What would be our default as
> > > > > > shipped?
> > > > > 
> > > > > If there is no downside to allowing both, probably both. If there is a
> > > > > downside then ipv4, since it much more likely to be the default on OS's
> > > > > for the next release or two.
> > > > > 
> > > > > Robert Treat
> > > > > 
> > > > > 
> > > > > 
> > > > > 
> > > > 
> > > > -- 
> > > > 
> > > > 
> > > > Nigel Kukard  (Chief Executive Officer)
> > > > Lando Technologies Africa (Pty) Ltd
> > > > nigel@lando.co.za   www.lando.co.za
> > > > Tel: 083 399 5822  Fax: 086 1100036
> > > > Hoheisen Park Bellville,  Cape Town
> > > > National  Internet Service Provider
> > > > 
> > > > 
> > > >   The best language to use is the language that was designed for
> > > >          what you want to use it for - 1997
> > > > 
> > > > 
> > > > =====================================================================
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> > 
> > -- 
> > 
> > 
> > Nigel Kukard  (Chief Executive Officer)
> > Lando Technologies Africa (Pty) Ltd
> > nigel@lando.co.za   www.lando.co.za
> > Tel: 083 399 5822  Fax: 086 1100036
> > Hoheisen Park Bellville,  Cape Town
> > National  Internet Service Provider
> > 
> > 
> >   The best language to use is the language that was designed for
> >          what you want to use it for - 1997
> > 
> > 
> > =====================================================================
> > 
> > Disclaimer
> > ----------
> > The contents of this message and any attachments are intended 
> > solely for the addressee's use and may be legally privileged and/or 
> > confidential information. This message may not be retained, 
> > distributed, copied or used if you are not he addressee of this 
> > message. If this message was sent to you in error, please notify 
> > the sender immediately by reply e-mail and then destroy the message 
> > and any copies thereof.
> > 
> > Opinions, conclusions and other information in this message may be 
> > personal to the sender and is not that of Lando Technologies Africa 
> > or any of it's subsideries, associated companies or principals and 
> > is therefore not endorsed by any of the Lando groups of companies. 
> > Due to e-maill communication being insecure, Lando groups of 
> > companies do not guarantee confidentiality, security, accuracy or  
> > performance of the e-mail. Any liability for viruses is excluded 
> > to the fullest extent.
> > 
> > 
> 
> -- 
>   Bruce Momjian                        |  http://candle.pha.pa.us
>   pgman@candle.pha.pa.us               |  (610) 359-1001
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