> -----Original Message----- > From: cygwin-ow...@cygwin.com [mailto:cygwin-ow...@cygwin.com] On Behalf Of > Brian Inglis > Sent: Wednesday, January 13, 2016 12:14 AM > To: cygwin@cygwin.com > Subject: Re: getaddrinfo fails with EAI_NODATA for some valid hosts with A > records > > Corinna Vinschen <corinna-cygwin <at> cygwin.com> writes: > > On Jan 7 15:39, Brian Inglis wrote: > >> getaddrinfo fails with err 7 EAI_NODATA for some valid hosts with A > >> records. > >> Err 7 EAI_NODATA is mapped from WSANO_DATA err 11004 in Windows. > >> Can anyone reproduce failure with problem host name below? > > > > Yes, I can reproduce it, and it's a total surprise. > > > I have no idea why Windows' getaddrinfo chokes on leapsecond.utcd.org > > at all. > > Especially when after just one getaddrinfo call, the DNS cache is populated > with: > leapsecond.utcd.org > ---------------------------------------- > Record Name . . . . . : leapsecond.utcd.org > Record Type . . . . . : 1 > Time To Live . . . . : 600 > Data Length . . . . . : 4 > Section . . . . . . . : Answer > A (Host) Record . . . : 244.34.36.97 > > so the DNS server is being contacted and responding normally, but it would > appear Windows GAI is failing to use that info. > Has this been reproduced on W10 so we can report this upstream? > Is there any support without an account for upstream W7 reports? > > DNS just translates URLs to IP addresses. It is no surprise that works. However, addresses in the range 240.0.0.0 - 255.255.255.255 are reserved. Windows is probably blocking that as a "favor".
Net Range 240.0.0.0 - 255.255.255.255 CIDR 240.0.0.0/4 Name SPECIAL-IPV4-FUTURE-USE-IANA-RESERVED Handle NET-240-0-0-0-0 Parent Net Type IANA Special Use Origin AS Organization Internet Assigned Numbers Authority (IANA) Registration Date Last Updated 2013-08-30 Comments Addresses starting with 240 or a higher number have not been allocated and should not be used, apart from 255.255.255.255, which is used for "limited broadcast" on a local network. This block was reserved by the IETF, the organization that develops Internet protocols, in the Standard document and in RFC 1112. The documents can be found at: http://datatracker.ietf.org/doc/rfc1112 RESTful Link http://whois.arin.net/rest/net/NET-240-0-0-0-0 See Also Related organization's POC records. See Also Related delegations. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
