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Invalid protocol state (with squid) #21

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kyechou opened this issue Oct 31, 2022 · 3 comments
Open

Invalid protocol state (with squid) #21

kyechou opened this issue Oct 31, 2022 · 3 comments
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kyechou commented Oct 31, 2022

example 04
Output: https://hastebin.com/xekogugijo
@kyechou kyechou added the bug Something isn't working label Oct 31, 2022
@kyechou kyechou self-assigned this Oct 31, 2022
kyechou added a commit that referenced this issue Oct 31, 2022
@kyechou
Skip packets with invalid protocol states (#21)
e23ba3a 
Such as middlebox as an endpoint resetting or reconnecting to devices
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kyechou commented Oct 31, 2022

The problem was caused by the proxy trying to re-establish new connections to the server after the proxy has sent out a FIN-ACK packet but before the server replies with FIN-ACK or the previous connection terminates.

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kyechou commented Oct 31, 2022 •
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Potential solution(?):

  • When this kind of error (pkt.proto_state() < model.proto_state()) happens, rewind the emulation again to reset their internal timer.
  • Also, if we can pause and then later resume the emulation, that may also solve the issue.

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kyechou commented Nov 17, 2022 •
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SIGSTOP, SIGCONT
https://major.io/2009/06/15/two-great-signals-sigstop-and-sigcont/

@kyechou kyechou changed the title Invalid protocol state Invalid protocol state (with squid) Apr 14, 2023
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21-invalid-protocol-state netarch/neo
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