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To:	cygwin AT cygwin DOT com
From:	Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca>
Subject:	getaddrinfo fails with =?utf-8?b?RUFJX05PREFUQQ==?= for some valid hosts with A records
Date:	Thu, 7 Jan 2016 15:39:08 +0000 (UTC)
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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? 


STC is run on Linux and Cygwin (up to date):

#!/bin/bash
# nslookup, getent hosts, getent ahosts run with good and problem host names
uname -srvmo
nslookup -debug cygwin.org
getent hosts    cygwin.org
getent ahosts   cygwin.org
nslookup -debug leapsecond.utcd.org
getent hosts    leapsecond.utcd.org
getent ahosts   leapsecond.utcd.org
uname -srvmo


# Linux results:
$ uname -srvmo
Linux 4.1.13-v7+ #826 SMP PREEMPT Fri Nov 13 20:19:03 GMT 2015 armv7l GNU/Linux
$ nslookup -debug cygwin.org
Server:         64.59.135.148
Address:        64.59.135.148#53
------------
    QUESTIONS:
        cygwin.org, type = A, class = IN
    ANSWERS:
    ->  cygwin.org
        internet address = 209.132.180.131
        ttl = 300
    AUTHORITY RECORDS:
    ADDITIONAL RECORDS:
------------
Non-authoritative answer:
Name:   cygwin.org
Address: 209.132.180.131
$ getent hosts    cygwin.org
209.132.180.131 cygwin.org
$ getent ahosts   cygwin.org
209.132.180.131 STREAM server1.sourceware.org
209.132.180.131 DGRAM
209.132.180.131 RAW
$ nslookup -debug leapsecond.utcd.org
Server:         64.59.135.148
Address:        64.59.135.148#53
------------
    QUESTIONS:
        leapsecond.utcd.org, type = A, class = IN
    ANSWERS:
    ->  leapsecond.utcd.org
        internet address = 244.34.36.97
        ttl = 600
    AUTHORITY RECORDS:
    ADDITIONAL RECORDS:
------------
Non-authoritative answer:
Name:   leapsecond.utcd.org
Address: 244.34.36.97
$ getent hosts    leapsecond.utcd.org
244.34.36.97    leapsecond.utcd.org
$ getent ahosts   leapsecond.utcd.org
244.34.36.97    STREAM leapsecond.utcd.org
244.34.36.97    DGRAM
244.34.36.97    RAW
$ uname -srvmo
Linux 4.1.13-v7+ #826 SMP PREEMPT Fri Nov 13 20:19:03 GMT 2015 armv7l GNU/Linux


# Cygwin results:
$ uname -srvmo
CYGWIN_NT-6.1 2.3.1(0.291/5/3) 2015-11-14 12:44 x86_64 Cygwin
$ nslookup -debug cygwin.org
Server:         64.59.135.148
Address:        64.59.135.148#53
------------
    QUESTIONS:
        cygwin.org, type = A, class = IN
    ANSWERS:
    ->  cygwin.org
        internet address = 209.132.180.131
        ttl = 199
    AUTHORITY RECORDS:
    ADDITIONAL RECORDS:
------------
Non-authoritative answer:
Name:   cygwin.org
Address: 209.132.180.131
$ getent hosts    cygwin.org
209.132.180.131 cygwin.org
$ getent ahosts   cygwin.org
209.132.180.131 0      cygwin.org
$ nslookup -debug leapsecond.utcd.org
Server:         64.59.135.148
Address:        64.59.135.148#53
------------
    QUESTIONS:
        leapsecond.utcd.org, type = A, class = IN
    ANSWERS:
    ->  leapsecond.utcd.org
        internet address = 244.34.36.97
        ttl = 501
    AUTHORITY RECORDS:
    ADDITIONAL RECORDS:
------------
Non-authoritative answer:
Name:   leapsecond.utcd.org
Address: 244.34.36.97
$ getent hosts    leapsecond.utcd.org
244.34.36.97    leapsecond.utcd.org
$ getent ahosts   leapsecond.utcd.org
$ uname -srvmo
CYGWIN_NT-6.1 2.3.1(0.291/5/3) 2015-11-14 12:44 x86_64 Cygwin



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