Re: [v6ops] getaddrinfo glitch (Re: An Update to Happy Eyeballs)
David Schinazi <dschinazi@apple.com> Thu, 23 March 2017 17:40 UTC
Return-Path: <dschinazi@apple.com>
X-Original-To: v6ops@ietfa.amsl.com
Delivered-To: v6ops@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5FC781294C5 for <v6ops@ietfa.amsl.com>; Thu, 23 Mar 2017 10:40:18 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.3
X-Spam-Level:
X-Spam-Status: No, score=-4.3 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=apple.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id gBxVrNufU_63 for <v6ops@ietfa.amsl.com>; Thu, 23 Mar 2017 10:40:16 -0700 (PDT)
Received: from mail-in23.apple.com (mail-out23.apple.com [17.171.2.33]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 2A122129706 for <v6ops@ietf.org>; Thu, 23 Mar 2017 10:40:10 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; d=apple.com; s=mailout2048s; c=relaxed/simple; q=dns/txt; i=@apple.com; t=1490290809; h=From:Sender:Reply-To:Subject:Date:Message-id:To:Cc:MIME-version:Content-type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-reply-to:References:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=uncXQYwrFDI6GABqXwEFYDY+uZ9cUQmJcHbJHWuoiPY=; b=3pHyMg4RQjxf0K6A5Lk4xYI8a4FcgzOwzcVAtAKUzjp8EWCvWn0IZaC98YWO+GHP DLzSHPfA24HtMV2kNksEZmuJL2OTymZy3KVYA2fRNUDGpSPo+i4svFOhA+2rqQcU d5MuPZPd3EACRIQs6XwLwfWNNhKtOvZjn0mCo/nKVg+6kENi3Ige5ZOkoYOU64LP 3ELLjeu+LFnKf4MEIRDuSdMnlp69ixpnUauRhJJoDd4eCnaCzRVQlLeb5/0u5H5p E702fH6rbhXiXaNZJDkPPNtpvryQYnG5VqlhdSnROQOEy4ci5OLkB0/aa2nSaRD0 tkDWCvWS+JZr1V3GrJ6KOQ==;
Received: from relay3.apple.com (relay3.apple.com [17.128.113.83]) by mail-in23.apple.com (Apple Secure Mail Relay) with SMTP id 5F.1C.29767.97804D85; Thu, 23 Mar 2017 10:40:09 -0700 (PDT)
X-AuditID: 11ab0217-0fc2f9a000007447-3f-58d40879f7de
Received: from kencur (kencur.apple.com [17.151.62.38]) by relay3.apple.com (Apple SCV relay) with SMTP id C4.E7.03951.87804D85; Thu, 23 Mar 2017 10:40:08 -0700 (PDT)
MIME-version: 1.0
Content-type: multipart/alternative; boundary="Boundary_(ID_3ZVOUS1jVnnV3661Ji9zEA)"
Received: from [17.153.58.80] (unknown [17.153.58.80]) by kencur.apple.com (Oracle Communications Messaging Server 8.0.1.2.20170210 64bit (built Feb 10 2017)) with ESMTPSA id <0ONA00JDD3QU5P50@kencur.apple.com>; Thu, 23 Mar 2017 10:40:08 -0700 (PDT)
Sender: dschinazi@apple.com
From: David Schinazi <dschinazi@apple.com>
Message-id: <FE713EA4-FE4C-4297-AEBF-8F30044687BE@apple.com>
Date: Thu, 23 Mar 2017 10:40:08 -0700
In-reply-to: <CAKD1Yr3+3xgHRgO69YxC+qOk3qZG4HuGWkuHQe8tkAT7Dm2d4Q@mail.gmail.com>
Cc: 神明達哉 <jinmei@wide.ad.jp>, Job Snijders <job@instituut.net>, IPv6 Operations <v6ops@ietf.org>
To: Lorenzo Colitti <lorenzo@google.com>
References: <CAJE_bqdQnYL8S044zqZ6MfOAYCBke-y-m-D6tE2Hj0vV5aYKNA@mail.gmail.com> <CAKD1Yr3+3xgHRgO69YxC+qOk3qZG4HuGWkuHQe8tkAT7Dm2d4Q@mail.gmail.com>
X-Mailer: Apple Mail (2.3251)
X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrOLMWRmVeSWpSXmKPExsUi2FAYrFvJcSXC4MhsGYtFuw+wWTyd+pPV Yv3pd4wWp4/tZXZg8ViwqdRjyZKfTB7Lu/U89j49xhbAEsVlk5Kak1mWWqRvl8CV8WP+cZaC JQoVPe8vszcwfpfuYuTkkBAwkbh86w1LFyMXh5DAPkaJlZOeMsEkrs7ZzAqRWMEocWTNOzaQ BK+AoMSPyfdYQGxmgTCJq7OPM0MUNTJJTG88zAySEBaQlui6cBeom4ODTUBL4sAaI4heG4nN DSsZIUo8JXreLQBbxiKgKrHk9xIwm1MgWGLSlneMEPOrJD703QcbKSKgIfFg3XEmiF0zGSVm b7zFDHGprMSn5z/ZQRISAvPYJXY86GObwCg0C8mxs5AcOwvoJmYBdYkpU3IhwtoST95dYIWw 1SQW/l7EhCy+gJFtFaNwbmJmjm5mnpGxXmJBQU6qXnJ+7iZGUMysZhLfwfj5teEhRgEORiUe 3h8clyOEWBPLiitzDzFKc7AoifPOFAEKCaQnlqRmp6YWpBbFF5XmpBYfYmTi4JRqYNQ5vcQk 0viC/a55fvIbWsyaTl4L4d7qsYyDxU785STu0+Wb5nyZt2j2I+nbekXnYs6kBj3a3RqdxBfr dt86MkXYy/ttQfxX9y83Yi/vjsq/ztRjKqaVFp22lUX5+yybY+oXrPqnXhG+fOlshLfL1Wti Cetyp6+ycjYqfGXY+bdc7URmyo6315RYijMSDbWYi4oTAXBVMyZ6AgAA
X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrPKsWRmVeSWpSXmKPExsUiON1OTbeC40qEQfM7M4tFuw+wWTyd+pPV Yv3pd4wWp4/tZXZg8ViwqdRjyZKfTB7Lu/U89j49xhbAEmVtk5ZfVJ5YlKJQlFxQYqtUnJGY kl8eb2lsZOqQWFCQk6qXnJ+rpG9nk5Kak1mWWoTMSrDO+DH/OEvBEoWKnveX2RsYv0t3MXJy SAiYSFyds5m1i5GLQ0hgBaPEkTXv2EASvAKCEj8m32MBsZkFwiSuzj7ODFHUyCQxvfEwM0hC WEBaouvCXaBuDg42AS2JA2uMIHptJDY3rGSEKPGU6Hm3gAnEZhFQlVjyewmYzSkQLDFpyztG iPlVEh/67oONFBHQkHiw7jgTxK6ZjBKzN95ihrhUVuLT85/sExj5ZyG5bxaS+2YBncEsoC4x ZUouRFhb4sm7C6wQtprEwt+LmJDFFzCyrWIUKErNSaw01oOH3yZGUAw1FAbvYPyzzOoQowAH oxIP74a6SxFCrIllxZW5hxglOJiVRHiL2K5ECPGmJFZWpRblxxeV5qQWH2Lczwj05URmKdHk fGCE55XEGxpbGFuaWBgYmFiamRAWNjExMDE2NjM2Njcxp6Wwkjhv1xeglwTSE0tSs1NTC1KL YF5g4uCUamBU3Vtuw3R8m4ipy5tSo7RbO45v+Wu6LsXYa/uan0YPtsm2/ItbYbhSc2aNsg3n pdcHPpTGFDTffXdfN+H+uf1P5VmSny092pL/IOeprC2neazM8VTlCI71615n3nMp+rXkmOQj Xz5ngcC3YVNTjOq+mq2yD94vyrTDYEO56E29a0laCiEr2D4qsQBTt6EWc1FxIgCTrkGzQgMA AA==
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/MnAixmpjMyHZL2NGVzgtkzLNQXc>
Subject: Re: [v6ops] getaddrinfo glitch (Re: An Update to Happy Eyeballs)
X-BeenThere: v6ops@ietf.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: v6ops discussion list <v6ops.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/v6ops>, <mailto:v6ops-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/v6ops/>
List-Post: <mailto:v6ops@ietf.org>
List-Help: <mailto:v6ops-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/v6ops>, <mailto:v6ops-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 23 Mar 2017 17:40:18 -0000
Not much sympathy for the blog post for not reading the manual:
<<
If the AI_NUMERICHOST bit is set, it indicates that hostname should be
treated as a numeric string defining an IPv4 or IPv6 address and no name
resolution should be attempted.
>>
Because of scope id, string to binary representation should always use
getaddrinfo() with AI_NUMERICHOST.
David
> On Mar 22, 2017, at 19:54, Lorenzo Colitti <lorenzo@google.com> wrote:
>
> On Thu, Mar 23, 2017 at 11:50 AM, 神明達哉 <jinmei@wide.ad.jp <mailto:jinmei@wide.ad.jp>> wrote:
> At the very least the blog should point to a specific poor
> implementation, and, say that even if it's not an inherent defect of
> getaddrinfo() itself but due to one bad implementation they should
> give up using it to be portable.
>
> +1. A better approach for the blog post would have been to say "don't use AI_ADDRCONFIG if all you want to do is convert IP addresses to socket structures, because it doesn't work well on these platforms".
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops
- [v6ops] getaddrinfo glitch (Re: An Update to Happ… 神明達哉
- Re: [v6ops] getaddrinfo glitch (Re: An Update to … Lorenzo Colitti
- Re: [v6ops] getaddrinfo glitch (Re: An Update to … David Schinazi