tree 29c014ab4e9cdb82581b91fa51aed7eb3dc91d00
parent 9e6b497c872f3298d1b965e5cf9f623dd10ddef4
author Peter McCurdy <pmccurdy@google.com> 1490406576 -0400
committer Peter McCurdy <pmccurdy@google.com> 1494895869 -0400

Start a new handshake from the server if we get an unknown ack.

If a client times out for some reason, or the server restarts, then the
server might get a packet for an unknown session that the client thinks
is valid.  Send a handshake packet with a fresh cookie in that case, to
tell the client it should resync.

Change-Id: I82d567b293043d30a3d687a3794d3b50123319e7