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[Bug network/14990] New: getaddrinfo with servname=NULL returns addresses multiple times
- From: "psimerda at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Sun, 30 Dec 2012 12:53:41 +0000
- Subject: [Bug network/14990] New: getaddrinfo with servname=NULL returns addresses multiple times
- Auto-submitted: auto-generated
http://sourceware.org/bugzilla/show_bug.cgi?id=14990
Bug #: 14990
Summary: getaddrinfo with servname=NULL returns addresses
multiple times
Product: glibc
Version: 2.15
Status: NEW
Severity: normal
Priority: P2
Component: network
AssignedTo: unassigned@sourceware.org
ReportedBy: psimerda@redhat.com
Classification: Unclassified
Testing in python:
>>> print(*getaddrinfo ("localhost", None), sep='\n')
Actual result:
(10, 1, 6, '', ('::1', 0, 0, 0))
(10, 2, 17, '', ('::1', 0, 0, 0))
(10, 3, 0, '', ('::1', 0, 0, 0))
(2, 1, 6, '', ('127.0.0.1', 0))
(2, 2, 17, '', ('127.0.0.1', 0))
(2, 3, 0, '', ('127.0.0.1', 0))
Expected result:
(10, 0, 0, '', ('::1', 0, 0, 0))
(2, 0, 0, '', ('127.0.0.1', 0))
POSIX1-2008:
If servname is null, the call shall return network-level addresses for the
specified nodename.
http://pubs.opengroup.org/onlinepubs/009604499/functions/getaddrinfo.html
Filling in the socktype and protocol is IMO not a good idea and returning
duplicate addresses prevents applications from using getaddrinfo for host name
resolution and violates POSIX.
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