Re: [netmod] rfc6991bis: inet:host

Ladislav Lhotka <ladislav.lhotka@nic.cz> Mon, 27 July 2020 13:18 UTC

Return-Path: <ladislav.lhotka@nic.cz>
X-Original-To: netmod@ietfa.amsl.com
Delivered-To: netmod@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D78BA3A19A7 for <netmod@ietfa.amsl.com>; Mon, 27 Jul 2020 06:18:33 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.118
X-Spam-Level:
X-Spam-Status: No, score=-2.118 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=nic.cz
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 oqKxd954cxTF for <netmod@ietfa.amsl.com>; Mon, 27 Jul 2020 06:18:30 -0700 (PDT)
Received: from mail.nic.cz (mail.nic.cz [217.31.204.67]) (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 3BAA33A197F for <netmod@ietf.org>; Mon, 27 Jul 2020 06:18:28 -0700 (PDT)
Received: from [IPv6:2001:1488:fffe:6:a88f:7eff:fed2:45f8] (unknown [IPv6:2001:1488:fffe:6:a88f:7eff:fed2:45f8]) by mail.nic.cz (Postfix) with ESMTPSA id 540EF140B70 for <netmod@ietf.org>; Mon, 27 Jul 2020 15:18:25 +0200 (CEST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1595855905; bh=zQ8uwSURHwODbinxkkAYFCMlhmrv/Z62rYtKCNNKsy0=; h=To:From:Date; b=jHl3TTwBDgpnMGNamtRL85hG0PlVrBbSi9b5VN7Yz6CjAu3I+b/OvSIKSBfBkB6aA pTTXvyB/9ldpDs2G4ASaLUTQ4iL0grE4ARuTXvS9z1+9/zebA3ONSwUs1gINFtXzBs paOMrL8PQ+6toh5CEOELhaeD9mzYC1gN99j1KdZk=
To: netmod@ietf.org
References: <20200717191717.u5a3wv4nbajjdcaj@anna.jacobs.jacobs-university.de> <87ft9mzhe0.fsf@nic.cz> <20200721194434.pvekzgxaus43iihg@anna.jacobs.jacobs-university.de> <AM7PR07MB62482ED4917241DBCD08E7B7A0790@AM7PR07MB6248.eurprd07.prod.outlook.com> <20200722110030.6c7r6utxgjbsilkq@anna.jacobs.jacobs-university.de> <ff42e4cb-957c-a4f0-a88b-333a6565ed8e@nic.cz> <20200724083617.u3wkr34ehjezmusq@anna.jacobs.jacobs-university.de> <87a6zmifpo.fsf@nic.cz> <20200726202427.oqythl6sggm4uzxe@anna.jacobs.jacobs-university.de> <87wo2p8hnw.fsf@nic.cz> <20200727104412.jxgocoaxi2u6pula@anna.jacobs.jacobs-university.de>
From: Ladislav Lhotka <ladislav.lhotka@nic.cz>
Autocrypt: addr=ladislav.lhotka@nic.cz; keydata= mQINBFhU5JIBEACmGIeLglGrwf6JBcNrcLoO19yAdKcH7V132STGHlhEAgmdzwclgVE7GN7y 5+1ySQ8jhDM80QSQ+XaXsSbHTQl23vcVvSfKNdme11kGEQ7kO/bTbUYxpRRa5dqDjLeEHhol WiNk6nUHqEAExbpEoITiO216Lwxh8gD2+39ZH/UVJgMHoZD1VmrxHSnp9b1SpmDWkbILRc93 u6lADieU67SG5vWqGaBgp8JQAVI3F+ZhcLXHQiQLPliePT3YKfvubWg9NIprts9fv2JAUywv NN4R5gg1oFegOXouzlBySiUNXndzJsj1JAcI4psGA9iGYBhgdILXg+2Kwkok9rrx1gWsqtmb lcFDiJRx52FUohHz9obZ9gkOd4NoV4jatjnu+9HKA8V2T5JUgTCgOWeI2yHoSNFJvKO0ygIg /5ccrB9iRdmJIiA2cAmu5MaHnKxAcQ7eaXqQN+JRcpFUH2ooFHKm0750U3aAZY3an5+a5Njh XddaDDX/7f0a68jaWuoKFn7Mqa2HhNnLJs2Nsq9quLdWEUh59wOgTrp2TZnkAFtG1MGa2dNz M3YX22+jwbnfv/U72fEu33juXfMLWfwzJEzQG47dnpmsArt8fM+atOvTSvkLQDNJkOSVZT8m NR5/OeIYfxhe3FUSrljRQBXN8ioVoiMtcCR8EKXCwCnja20vdQARAQABtChMYWRpc2xhdiBM aG90a2EgPGxhZGlzbGF2Lmxob3RrYUBuaWMuY3o+iQJUBBMBCgA+FiEEtr1TxpCtJF8Aid5X uPkrCKn3bGcFAl3k3q0CGwMFCQecs7wFCwkIBwMFFQoJCAsFFgIDAQACHgECF4AACgkQuPkr CKn3bGeXZA/+IM3zgfkMwQ+rvYMEn1cHoYwA0j8iwGtQp6FQYO/Vj0d6Q07Q5/iUqM0UuniU HN6xC5APrPsxwyeSuJUW1zjGm6JD8U5WinbNJuBU/FMC7XyHgOwwXdlT1bLlhOYnvUrZx0bB QeMLnUinvTHLVFnpUCfFpyKRUKh3kkUJS5AXRz5ZgEqJUr79GSTg46dluXlz9mnPIkwluwYO ydlhtW/+s/xVuCIqRUdhhc30d8K5XB+smiYmHSzePjLGwsP1pHt1e8we57EFNvm7iiwXPCAI cy+PAtCxmq2zsIxsZxtZP4SWbRcj2Z16XTtT+hhNK6SWKhpDuacadpWChXpYc36xtuJ5Ll3C lZqa/6mDRcagJy016pQboW/4JIkFcFhu6ugNwvR1OBom04VPVBxqQRgazqpfkB0jSWWS4rwh l30kwDFW5eWcski3Ja5g2drj0YpUeEkMOQcToxLPXffI6dauKTMh7K6RF++LGCYxOukWt2r+ jk6/pB3rSVztAJDb4kc/EgE7yNwrVQOxkKHfk3rGCXkvijCgU3jS0k5g01/OwENxpEUk0Nln mlLJdb8Bju6Jp2y3ZX97+Szs2tH8M6Mpny213lFgc4EVCOFVtIPsyYfiR9On1IIdRqMx3mQC 5AV+3Wc0o3M7Ku0ZbuhkYLNIhlNrRjlxFRk12FpZwFwznY+5AQ0EWFTnYgEIAM6XJ37HGp7H nzztkWbCW+5zkLzff2LQh7yoH32CGJTK7vnQKOY+JKi16lR1qUDHOUtYfRj17jBNWaB0CY0k qkRWCDXG0pff8VT63Kg/DlS2LLbPQpO2NcjdMhPTTUadnKWeo7h6/mFF7VW4X2sm1NYeNWD5 VQxdPQUbnCJ4Pi23QZRJnBu2ycM9aXa7ERRvpN3i3mAc2UgkJWq4KGjI74cd7ytCsU0RN6RT S0sFE4zCB1r6nXqfHHiousATS6+3GnuIGTtaeR0nXHlIvl2AC91+hswsWaA7YB4dB2/GJ8PN L3d07gA6yR2DoZJZhAmtMUiUzap4jgf07UoTOY80MHkAEQEAAYkDcgQYAQoAJgIbAhYhBLa9 U8aQrSRfAIneV7j5Kwip92xnBQJcLzGrBQkHnLFJAUDAdCAEGQEKAB0WIQQ+THLKBBuTzVYa 3ozuYRDCyLOtngUCWFTnYgAKCRDuYRDCyLOtnhnlB/49PV5puyMGBJXY5XBdaPIKFfC5eBfy EOgMqDfJS9yhV7bhFRzzztX9Z7COod6mxmlogNaDFMk/yFH25DOe2tpjKs6sqa9bwyY3cOFw pp38VdeAq0FxF3qOhjKzF12RVQ4Ipu/ahzzQ6V5reia+onOghw+BrjOsPExJaDbiif5UqL/F yWvERlR46GGbFzK9gEvUo+52Wjx3t4hW2IMZKS58xvzkMkTQtxYHAM++jO7bH18wV603JJC3 mZxq9YKKFHVcxinp9l8yzVxfIjhiklednvb30lggY4VEG6X+BER/lcw1QgSDojjbHY72o+76 rBYZ+pSacY/idn5AkAEkQyxsCRC4+SsIqfdsZ1aAEACjuN1b73KNsdsNZuV/MSdmfC+LkoG2 +20kGWzHHiq1Owc4W3fDRohJThM5xyKt2RAcLZAqzfeef1AuoESTqqR6OheaF3u0HAa+U87E /dfjflBOsGZloNi/0/JcN2B8VJpXBwA55adA4YwNL/i8k/roIZ0Yh4wd8Bv8G4exrjvPZPCG klGNBvIJomaqgb9YDvdN22CW3f0zoCwdTX+XV7YL6IQsZroRViLWZv12UCKO1kVop8IMQolx XGbo4kVkqtVx0A4O+ZqCiG819QGZIAtaKSG6aK1xWxNg16ClbEoCEglPeLiOr1ttibO6emuK 4w+4vA5nu+q5niUZ611f/9OtnNO6w/EZ9jRjiqBbo7esNkzal4LjwZUa0B3poWRz+7B++CYS F0c/qdfqjYmiN4IEbXnC0EFhwOYejTayy/H/nA0yGjxF7xA2Krom8B3YTaOnaZ2lVx0gtQK6 Ih7SSc842yRyBnMoVko8mzcHb/0urD2uWkPI5VfXLF9OJhfe3J1xswtqfOxFtf1cZv6fnQID 4gfsvRP8s8Wow5m3gp1HLSlxeZcc57nK8/nKWaTssdOf6doSw8kLWC5Dcwx2Ld15SsjkHeCO MtOaIxq+Er6vnvcepj76pZZJznS/bMriYPyyw0FIYmAPcnm3v5W+HZ339ktp+Kk3fNl3qJo6 C+Sjv7kBDQRYVOgGAQgA0GW5sWxqhcD9hxi/LQZ/hzPBgrpTvyIgxHrJN1HZ2BzdpNU7UlnC DVDzvAV2/1kEIiCdTYnnly0+PCHhyEdP45M9//oH7KYd/F/JSQwI+56mGP2O0fBBu9WStHws RraGfzGGZDV1XutvIz/qzpkBGpXGzA73Bi2Xye+/9JtHXmjhoXnItQLO38Hqnb5kXk79cSC4 TStPAKdrB/CMolcArT8j9eijIUOPMkWCGCeICv/hECpA5CZma2tplU80cKiOIYknFG8E+5Pr FlW962P7njIaahWSIObM2/C48uu5KAwgyDj6DA14cwc/4wfRsXZFjUMNpI0xer1iLQV5y1vi 6QARAQABiQI8BBgBCgAmAhsMFiEEtr1TxpCtJF8Aid5XuPkrCKn3bGcFAlwvMc8FCQecsMkA CgkQuPkrCKn3bGfkEg//alC3LNxnyH3tNy/OKQqOFJLUCidIm77DT/ZQfjLMAZezzCAq1Adf hVg7uV5a/dFdQdVDnjEz+SQ6/EzyqGashdAMnlBDwiqPe3MhB0L97VQwjNQa0wf1AsHdQCv8 i3e7U6RjlEmSC42dA+RjhrFOCZPtUTlCVDoSnY1S0kZOvEjhHvw901MPEINikZY4TBc18Xnk fbGQhglvI9NqBawlBKHyDGTAVJL7ld60iHsWt3prq+h48iFjc7x2JT39oBxT5Jhl3pg01QSC vu2Fg99vUuRr3u8tavnMKX4Vk3bujpHhuyOTSm0X37nwwu9DpMqkeUNvYR2RM+EuGGltonrN yrb5S21omN7fLDvRtdUBUOCFJLxZunTDLlkig/QuT+QlW7CG59Ussuu37HxgpiICCeeBDOaF bkZku43Qwt5cTtdJ8BkzYgvvoC7NegBn9N+U+Etrrvs09Slo11wlQx1F3sk9T9rjz1QrPM8j blxEgepm+W75VJ22z1qY/JnNElygR7KeTaeOY+iCn4wgDeC964AHMuGzG7aUg8P3zjgClL1T pFJwQUml880L6C+VuWPxuFIS18BPCYtLGlfQc5jp4dGN87ftenT13W70XiGXdrmIAFBF6Jjk 3huuDoRvdbPavAGdxu5QGdHeH0/GjfTxq7lRwgamoY0lw1LIB6LOzXo=
Organization: CZ.NIC
Message-ID: <2521f17d-c105-503a-1fc6-4f3ecaf6e58b@nic.cz>
Date: Mon, 27 Jul 2020 15:18:25 +0200
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0
MIME-Version: 1.0
In-Reply-To: <20200727104412.jxgocoaxi2u6pula@anna.jacobs.jacobs-university.de>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 7bit
X-Virus-Scanned: clamav-milter 0.102.2 at mail
X-Virus-Status: Clean
Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/3WIHf0HUxWwDiODTGBOlH8HU-wQ>
Subject: Re: [netmod] rfc6991bis: inet:host
X-BeenThere: netmod@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: NETMOD WG list <netmod.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/netmod>, <mailto:netmod-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/netmod/>
List-Post: <mailto:netmod@ietf.org>
List-Help: <mailto:netmod-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/netmod>, <mailto:netmod-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 27 Jul 2020 13:18:39 -0000


On 27. 07. 20 12:44, Juergen Schoenwaelder wrote:
> On Mon, Jul 27, 2020 at 10:51:31AM +0200, Ladislav Lhotka wrote:
>> Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> writes:
>>
>>> So would the following do the right thing?
>>
>> The invert-match pattern also needs to be added in order to avoid reserved labels:
> 
> Why are they illegal? If we make them illegal, how are we going to
> deal with hosts that have non-ASCII names?

I am not able to find in what sense the "Reserved LDH" labels of RFC
5890 are really reserved, and I am not sure about the implications of
permitting "xn--..." hostnames to be explicitly configured.

If we want to allow non-ASCII names, then it would IMO be safer to use a
type that expects straight Unicode for lexical representation and leave
it to the implementations to convert to Punycode where necessary, e.g.
when querying DNS.

Lada

> 
> /js
> 

-- 
Ladislav Lhotka
Head, CZ.NIC Labs
PGP Key ID: 0xB8F92B08A9F76C67