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2021-02-04nat: reduce number of hash tables for EI NATKlement Sekera4-81/+73
Making code more simple and storing thread index along with session index as a preparation step for fixing thread safety patches. Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: Ib0c531e9f1f64b1f1ee912d4a83279200638e931
2021-01-18nat: deal with flows instead of sessionsKlement Sekera2-5/+5
This change introduces flow concept to endpoint-dependent NAT. Instead of having a session and a plethora of special cases in code for e.g. hairpinning, twice-nat and others, figure all this out and store it in flow logic. Every flow has a match and a rewrite part. This unifies all the NAT packet processing cases into one - match a flow and rewrite the packet based on that flow. It also provides a cure for hairpinning dilemma where one part of the flow is on one worker and another on a different one. These cases are also sped up by not requiring destination adress lookup every single time to be able to rewrite source nat as this is now part of flow rewrite logic. Type: improvement Change-Id: Ib60c992e16792ea4d4129bc10202ebb99a73b5be Signed-off-by: Klement Sekera <ksekera@cisco.com>
2021-01-11nat: refactor and split fo EI/ED features p.2Filip Varga4-43/+917
Patch n. 2 aimed at moving EI features out of NAT44 plugin & split of EI/ED functions. Type: refactor Change-Id: Ida20c1c084449b146344b6c3d8442f49efb6f3fa Signed-off-by: Filip Varga <fivarga@cisco.com>
2021-01-05nat: refactor and split fo EI/ED featuresFilip Varga8-0/+5783
This patch is aimed at moving EI features out of NAT44 plugin & split of EI/ED functions. Type: refactor Change-Id: I63cf70a264ed2512708fe92665d64f04690783d0 Signed-off-by: Filip Varga <fivarga@cisco.com>