On/Dnia Mon, Jan 08, 2001 at 09:26:09AM +1100, Craig Small wrote/napisał(a) > > > > 1. getaddrinfo should not return IPv4 addresses if an IPv6 address > > > > exist, > > > > since using the IPv6 address implies usage of the IPv4 address. this idea is sick :) getaddrinfo() should return all possible addresses and then you can filter out ipv6 addresses if you want. Thing about situations where on ipv4-only kernel you use getaddrinfo(host,...) where host has A and AAAA records in DNS. You won't be able to connect to such host if your getaddrinfo() will return only v6 address.
> > > Why not use getipnodebyname()? You got a whole bunch of flags you can > > > set to determine what sort of address you are after. > > because getipnodebyname() is obsolete function. It's not supported in glibc > > 2.2 > > and afaik XNET specs treat it as obsolete, too. > > XNET? I don't know what that is. XNET spec was merged with opengroup/austingroup draft. > RFC 2553 describes this function. It used to be the gethostbyname3. yes, I know. Support for it was in cvs glibc but before release 2.2 it was removed. > So that means the "right" way of doing hostname->IP lookups is with > getaddrinfo() with all the lack of functionality as mentioned? yes, also draft rfc2553bis adds more functionality to it. > - Craig -- Arkadiusz Miśkiewicz, AM2-6BONE [ PLD GNU/Linux IPv6 ] http://www.t17.ds.pwr.wroc.pl/~misiek/ipv6/ [ enabled ]
