At 04:52 AM 2/26/2009, Corinna Vinschen wrote: | >On Feb 25 23:03, Pierre A. Humblet wrote: | > > I tried to compile Exim with IPv6 enabled and Cygwin 1.7, but it needs | > > gethostbyname2. | > > Here is an implementation of that function. | > > In attachment I am including the same patch as well as a short test function. | > > | > | >This is way cool! I have this function on my TODO list for ages. | > | >But there's a problem. You're using DnsQuery_A directly, but this | >function only exists since Win2K. Would it be a big problem to rework | >the function to use the resolver functions instead? They are part of | >Cygwin now anyway and that would abstract gethostbyname2 from the | >underlying OS capabilities.
I was afraid of that. Using res_query was my initial thought, but I realized that when using the Windows resolver I would undo in gethostbyname2 all the work done in minires. I am wondering if gethostbyname2 should not be moved out of net.cc and integrated with minires. We could design shortcuts to use the most appropriate method. I have read RFC 2133, section 6.1 . Do we want to implement having a RES_OPTIONS in the environment, in /etc/resolv.conf, or only by setting the appropriate flag in _res? What does Linux do? I am still fighting one issue with Windows. On XP, when using the native gethostbyname I can resolve computers on my local net (through NetBIOS or such). But I can't get them with DnsQuery, except my own computer, despite what I think the doc says. Any insight? Pierre
