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Re: [multipathtcp] comments for draft-hewu-mptcp-trust-00

<philip.eardley@bt.com> Thu, 14 November 2019 10:14 UTC

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From: philip.eardley@bt.com
To: nsd.ietf@gmail.com, multipathtcp@ietf.org
Thread-Topic: [multipathtcp] comments for draft-hewu-mptcp-trust-00
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Date: Thu, 14 Nov 2019 10:14:08 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/multipathtcp/N20C9iKsV3CLiKtAf2HPJ2BQymY>
Subject: Re: [multipathtcp] comments for draft-hewu-mptcp-trust-00
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Thanks for the draft
One thing that wasn’t clear to me – can you be sure that the Trust Flag has been correctly set ie not been set by a host for a connection that isn’t source-address-validated?

Thanks
phil

From: multipathtcp <multipathtcp-bounces@ietf.org> On Behalf Of Yoshifumi Nishida
Sent: 14 November 2019 07:49
To: multipathtcp <multipathtcp@ietf.org>
Subject: [multipathtcp] comments for draft-hewu-mptcp-trust-00

Hello,
I've read draft-hewu-mptcp-trust-00.Thanks for preparing this.
I have listed my comments below.

1: The idea for exchanging trusted addresses info for peers sounds interesting, but i might want to see how the info will be used a bit more. Say, if an endpoint has 1 trusted address and 2 non-trusted address, how the endpoint utilizes these addresses?

2: I am wondering if the Trust-Flag in echo-backed ADD_ADDR can indicate this source address is trusted. If so,  Host A in Figure 1 can update TPBT after receiving ADD_ADDR from B.
If this is possible,  I am guessing we can reduce the cases where you need to send ADDR_TRUST option.

Thanks,
--
Yoshi

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