From nobody Fri Sep 25 13:12:44 2020 Return-Path: X-Original-To: dnsop@ietfa.amsl.com Delivered-To: dnsop@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 793703A08BA; Fri, 25 Sep 2020 13:12:40 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.097 X-Spam-Level: X-Spam-Status: No, score=-2.097 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, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, SPF_HELO_NONE=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=gmail.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 Ba9UNYSaLyxU; Fri, 25 Sep 2020 13:12:38 -0700 (PDT) Received: from mail-lf1-x12f.google.com (mail-lf1-x12f.google.com [IPv6:2a00:1450:4864:20::12f]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 9AB5C3A08B9; Fri, 25 Sep 2020 13:12:38 -0700 (PDT) Received: by mail-lf1-x12f.google.com with SMTP id z19so4168572lfr.4; Fri, 25 Sep 2020 13:12:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=WCpffP/A+Chvj3r/8aXYTxalYiObn6mSC3veigh9Vcc=; b=Pd5pkKGw6HqfNBe9nU+PRXBty8wtS4JKeMK1eRUmsZffqlPbPrXApZHugkeP6k0o6C JHl5ctLskLkA4zVIULV9INIkcQeiRuYRUfcis98zCkzGRF7VGDbes1OnmaqphvFho6MS bneFfGDGJETx0Z0/LP6PoHBooooL3YtUcOJUJ1e/Fh7POT7TqMBrqhz19qWTaWaqR+ty SyU64qYu335/4kPJZ/t3P5iTuUfpat3aVPJcV8gE/w1SLdMxQZ+2eI74uS9Esh3cp2w1 nEOk6EZH221NA02bTguxKisofVxFBk82IbcCRmLv1T+b49lRQWq0+De4g9s+NUA2sZLt 9ibA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=WCpffP/A+Chvj3r/8aXYTxalYiObn6mSC3veigh9Vcc=; b=lt7Nij1WidlPlexd9RxaUnp3yCdAlrOhBNZGuYcTtGtYC8mQ7PorfneSHeCGSP+Q7+ dSCsRmCCzn0EuAySI6moFvBn1/6XxxvkI7xcFW/U8DF18O6Njtp0Ug42N065j3ulvwTd uLtbN4yHPN3w8je8GOC2DwRHkGYu8aes0OIXchyDFL81JQCJvCfOCJK9310d3KnIkLhw RbRNOAE/Z5aBSg/lNG2k9J7iGRu5nCZEUZETN/XFKYklORM3TL/jTdxrSZM4ScZrRmx7 APzQaoXEomHjhAPsNtOULazkg0OZJfLYmIWmwFpo2qQ6dsq3ePQs/tA18jdwCFHAiwuT Djtg== X-Gm-Message-State: AOAM5308+8/2wBpYp14uAFID2mLw9FLk/eFY/oKizrh8oc4V1KdA5jZZ eKoG2War49BHUXY1TVEm4OWBIwuSeE0RtCM/HUsFMJ3N X-Google-Smtp-Source: ABdhPJz5W55IcWJJJYc8FLxpsKvqSiruim/wUmCxHQibcB00uVJs/TRwCAtw+6B+sHxYZRP8oYFrpmvNZ6GT/wODZNE= X-Received: by 2002:a19:4319:: with SMTP id q25mr135812lfa.505.1601064756562; Fri, 25 Sep 2020 13:12:36 -0700 (PDT) MIME-Version: 1.0 References: <6694476E-A51B-44AD-AE53-A31D705B9DC4@apple.com> In-Reply-To: <6694476E-A51B-44AD-AE53-A31D705B9DC4@apple.com> From: David Schinazi Date: Fri, 25 Sep 2020 13:12:25 -0700 Message-ID: To: Tommy Pauly Cc: dnsop WG , QUIC WG Content-Type: multipart/alternative; boundary="00000000000013cca705b028f0fa" Archived-At: Subject: Re: [DNSOP] DNS HTTPS/SVCB record type support in iOS 14 X-BeenThere: dnsop@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: IETF DNSOP WG mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 25 Sep 2020 20:12:40 -0000 --00000000000013cca705b028f0fa Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Tommy, Thanks for the announcement! It's really exciting to see this deployed in the wild. Clarification question: your email mentioned support for the HTTPS DNS query, but it didn't mention when iOS makes those queries. For example, do you query this record every single time you perform A/AAAA queries? (in the context o= f a Network.framework connection to port 443) David On Fri, Sep 25, 2020 at 12:59 PM Tommy Pauly wrote: > Hello DNSOP & QUIC, > > I wanted to provide an update that the production version of iOS 14, whic= h > shipped last week, includes support for sending HTTPS (SVCB) DNS queries > (RR type 65) for applications using our system networking APIs. > > The implementation status has been updated here: > https://github.com/MikeBishop/dns-alt-svc/blob/master/svcb-implementation= s.md > > For those with HTTP/3 QUIC deployments, this means that (when HTTP/3 > experimental support is enabled) iOS will use the ALPN indication in the > HTTPS record to enable HTTP/3 prior to receiving an Alt-Svc indication. A= s > previously noted on the DNSOP list, Cloudflare is already supporting > publishing these records, and we=E2=80=99d encourage other server deploym= ents that > support QUIC to do the same. > > To note, this behavior is the same in the betas of macOS 11. > > Best, > Tommy > --00000000000013cca705b028f0fa Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Tommy,

Thanks for the announcement! = It's really exciting to see this deployed in the wild.
Clarif= ication question: your email mentioned support for the HTTPS DNS query,
but it didn't mention when iOS makes those queries. For example,= do you query
this record every=C2=A0single time you perform A/AA= AA queries? (in the context of
a Network.framework connection to = port 443)

David

On Fri, Sep 25, 2020 at 12:59= PM Tommy Pauly <tpauly=3D= 40apple.com@dmarc.ietf.org> wrote:
Hello D= NSOP & QUIC,

I wanted to provide an update that the = production version of iOS 14, which shipped last week, includes support for= sending HTTPS (SVCB) DNS queries (RR type 65) for applications using our s= ystem networking APIs.

The implementation status h= as been updated here:=C2=A0https://github.= com/MikeBishop/dns-alt-svc/blob/master/svcb-implementations.md

For those with HTTP/3 QUIC deployments, this means that (w= hen HTTP/3 experimental support is enabled) iOS will use the ALPN indicatio= n in the HTTPS record to enable HTTP/3 prior to receiving an Alt-Svc indica= tion. As previously noted on the DNSOP list, Cloudflare is already supporti= ng publishing these records, and we=E2=80=99d encourage other server deploy= ments that support QUIC to do the same.

To note, t= his behavior is the same in the betas of macOS 11.

Best,
Tommy
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