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authorKlement Sekera <ksekera@cisco.com>2022-01-10 21:57:27 +0000
committerOle Tr�an <otroan@employees.org>2022-01-24 12:59:46 +0000
commit56c492aa0502751de2dd9d890096a82c5f04776d (patch)
treea2b8a1c300853070b26f9953a10bd1a4e41f3bdd /test/test_nat66.py
parent4634d02501235d3803a17839eeaf076110abcb18 (diff)
nat: TCP state tracking based on RFC 7857/RFC 6146
Implement proper state machine based on above RFCs. ACKs to SYNs/FINs are no longer required/tracked. This is more friendly to peers and accounts for lost packets and retransmits. This change also means that all traffic is translated and forwarded while in transitory timeout, which helps delivering e.g. retransmitted FINs, FINACKs and other messages. Also support reopening a session in transitory timeout after seeing both FINs by seeing both SYNs again. This helps quick connection reestablishment if the peers want to. Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Signed-off-by: Miklos Tirpak <miklos.tirpak@gmail.com> Change-Id: Ibf521c79463472db97e593bfa02b32b4a06dfd2a
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