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zzz
last call for translations, pulling in an hour
zzz
orignal, ping re: path challenge/response
orignal
I'm here
orignal
be back in 2 hours
zzz
ok
dr|z3d
those routers would have been flagged as sybils if we had ip detection enabled.
orignal
back
zzz
ok
orignal
so, what's the secnario?
zzz
I reviewed the path challenge/response specs, my code, your code, and my logs
zzz
I have good news and bad news ))
zzz
the good news is that most of what you have is correct
zzz
the bad news is you've only done half of it
orignal
probably
zzz
there's two issues, the first one is bigger
orignal
I did somthing but not sure it was everything
zzz
1) when you get a packet from the wrong endpoint, you're supposed to enter the 'path validation phase;
zzz
which is a state machine. You reduce your send window to the old endpoint and send a path challenge to the new endpoint
zzz
when you get a path response back, THEN you change the endpoint
zzz
the whole system is to prevent attacks where MitMs resend a packet from a different endpoint to 'steal' the session
orignal
and what I do now?
zzz
you're just changing the endpoint immediately
zzz
so it's missing the whole point
orignal
thanks. will fix
zzz
2) (smaller issue)
zzz
the spec says the path challenge should contain address block, datetime block, and ack block
zzz
same for path response
zzz
I don't think you're doing that
orignal
probably now
orignal
*not
orignal
will fix irt
orignal
to
zzz
thanks
zzz
back on 1) the spec also talks about timers, retransmissions, failures, cancellation, etc. that the state machine should do
zzz
it's not too hard but that's the guidance
orignal
will read
zzz
not promising I do it all right either, but I tried ))
zzz
there's a LOT of port-hoppers out there, so it's not too hard to test
zzz
most of this, including the treat model and state machine, we got from QUIC, so I think it's pretty solid
orignal
new endpoints,yes, block yes, retranission not sure since onon always sayd that my retransmission is shit ))
zzz
I have a separate state machine for it, my regular retranmission code is only for data packets
orignal
got it
zzz
thanks. I think the spec is _pretty_ good, but holler if you need any help