Re: [quicwg/base-drafts] Be more conservative about migration? (#2143)

Martin Thomson <notifications@github.com> Thu, 13 December 2018 23:31 UTC

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Subject: Re: [quicwg/base-drafts] Be more conservative about migration? (#2143)
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What we have in practice is this:
```
A                       Attacker (Z)                  B

                                         <- [B:A]: Data
                     <- [B:A]: Data
[A:B]: ACK ->
                        [Z:B]: ACK ->

                                       X <- [B:Z]: Data
                                         <- [B:A]: Probe
                                       X <- [B:Z]: Probe
```

Provided the attacker isn't on path (where they could deny service anyway), the result is that the migration will fail as soon as the probe response arrives.

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