[Bug 217637] One TCP connection accepted TWO times

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Fri Mar 17 10:46:35 UTC 2017


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217637

--- Comment #25 from Alexandre martins <alexandre.martins at stormshield.eu> ---
(In reply to slw from comment #24)
In fact, the first ACK is replayed.

-> SYN (seq 1)
<- SYN/ACK (seq 80 ACK 1)
-> ACK (seq 1 ACK 81)

-> [DATA] (seq 1 ACK 81)
<- [DATA] (delayed/lost/ignored/...)
<- FIN (delayed/lost/ignored/...)
-> [DATA]
<- RST => the connection disappear from server (delayed/lost/ignored/...)
-> [DATA: Replay first packet] (seq 1 ACK 81) => Reopen the connection without
SYN + SYN/ACK !

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