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authorDavid Gibson <david@gibson.dropbear.id.au>2024-05-21 15:57:06 +1000
committerStefano Brivio <sbrivio@redhat.com>2024-05-22 23:21:01 +0200
commit43571852e62dae90fd0404b8a7c73e727930718e (patch)
treed37eb4b753a1f6a7bddbd2055080a800755db4f3 /test/pasta/ndp
parent0060acd11b191e0699e2c588a565c4929523db06 (diff)
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flow: Make side 0 always be the initiating side
Each flow in the flow table has two sides, 0 and 1, representing the two interfaces between which passt/pasta will forward data for that flow. Which side is which is currently up to the protocol specific code: TCP uses side 0 for the host/"sock" side and 1 for the guest/"tap" side, except for spliced connections where it uses 0 for the initiating side and 1 for the target side. ICMP also uses 0 for the host/"sock" side and 1 for the guest/"tap" side, but in its case the latter is always also the initiating side. Make this generically consistent by always using side 0 for the initiating side and 1 for the target side. This doesn't simplify a lot for now, and arguably makes TCP slightly more complex, since we add an extra field to the connection structure to record which is the guest facing side. This is an interim change, which we'll be able to remove later. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>q Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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