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From: "psimerda at redhat dot com" <sourceware-bugzilla@sourceware.org> To: glibc-bugs@sourceware.org Subject: [Bug network/14415] AI_V4MAPPED is useless with AI_UNSPEC but they're used together as defaults when hints=NULL Date: Thu, 03 Jan 2013 14:54:00 -0000 [thread overview] Message-ID: <bug-14415-131-XyGqt6B18t@http.sourceware.org/bugzilla/> (raw) In-Reply-To: <bug-14415-131@http.sourceware.org/bugzilla/> http://sourceware.org/bugzilla/show_bug.cgi?id=14415 --- Comment #5 from Pavel Šimerda <psimerda at redhat dot com> 2013-01-03 14:53:57 UTC --- Created attachment 6794 --> http://sourceware.org/bugzilla/attachment.cgi?id=6794 getaddrinfo: use zero ai_flags by default According to POSIX1-2008, AI_V4MAPPED flag shall be ignored unless ai_family equals AF_INET6. In the default hints, ai_family is AF_UNSPEC. Therefore AI_V4MAPPED is redundant. AI_ADDRCONFIG can potentially be beneficial to applications that use getaddrinfo() results to immediately call connect(), sendto() and similar functions to avoid querying redundant DNS records according to the current address configuration. Those applications will also need to specify ai_socktype and/or ai_protocol and therefore will not use hints=NULL. As AI_DEFAULT is not a part of the public API, such applications will not be able to use the default flags at all. Please note that POSIX1-2008 doesn't define any default flags at all. Resolves: #14415, #14965 -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
next prev parent reply other threads:[~2013-01-03 14:54 UTC|newest] Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-07-28 9:39 [Bug network/14415] New: " psimerda at redhat dot com 2012-07-31 18:44 ` [Bug network/14415] " tore at fud dot no 2012-08-03 4:04 ` carlos_odonell at mentor dot com 2012-08-03 4:06 ` carlos_odonell at mentor dot com 2012-08-03 16:12 ` psimerda at redhat dot com 2012-09-22 15:45 ` psimerda at redhat dot com 2012-12-04 0:00 ` carlos at systemhalted dot org 2013-01-03 14:54 ` psimerda at redhat dot com [this message] 2013-02-24 22:12 ` psimerda at redhat dot com 2013-10-20 20:54 ` neleai at seznam dot cz 2014-06-17 18:51 ` fweimer at redhat dot com
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