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2021-02-24nat: Final NAT44 EI/ED split patchFilip Varga1-1558/+0
This patch achieves complete separation of endpoint-dependent and endpoint-independent IPv4 NAT features. Some common stuff is also moved to NAT library. Type: refactor Change-Id: I52468b7e2b5ac28958a2baf8e2ea01787322e801 Signed-off-by: Filip Varga <fivarga@cisco.com>
2021-02-10nat: fix EI hairpinning thread safetyKlement Sekera1-4/+12
Avoid doing inter-thread reads without locks by doing a handoff before destination address rewrite. Destination address is read from a session which is possibly owned by a different thread. By splitting the work in two parts with a handoff in the middle, we can do both in a thread safe way. Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: I1c50d188393a610f5564fa230c75771a8065f273
2021-02-09nat: improve type safety and remove unused paramKlement Sekera1-45/+25
Type: improvement Change-Id: I456f9b14e6a4eb46c9c49f6e09acccae530e4ebc Signed-off-by: Klement Sekera <ksekera@cisco.com>
2021-02-05nat: configurable handoff frame queue sizeElias Rudberg1-2/+14
Make number of worker handoff frame queue elements configurable as a set nat frame-queue-nelts command. The default value is 64 which is the same value that was previously hard-coded. The idea is that allowing larger values can be useful in some cases, to avoid congestion drops. Also add nat_set_fq_options API support and a corresponding test case. Type: improvement Change-Id: I5c321eb2d7997f76fac2703d9c4a5b2516375db3 Signed-off-by: Elias Rudberg <elias.rudberg@bahnhof.net>
2021-02-04nat: reduce number of hash tables for EI NATKlement Sekera1-4/+4
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 Sekera1-63/+115
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 Varga1-29/+15
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 Varga1-73/+6
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>
2020-12-03nat: fix forwarding handoff workaroundFilip Varga1-0/+14
A special case when out2in packet needs to be handoffed to other worker thread. We are not able to determine which thread they belong to in the first processing of nat handoff node. These packets needs to go through out2in slowpath before we are able to tell where to handoff them. Type: fix Ticket: VPP-1941 Change-Id: I7173bda970ce6a91d81f48fc72aa2457586a076f Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-12-03nat: fix incorrect session removal caseKlement Sekera1-2/+1
Add a condition where a TCP session in transitory timeout is kept instead of being erroneously deleted. Type: fix Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: Ic625c8c88cc8864293ebd57b0321505652af9380
2020-11-13nat: cleanup & reorganizationFilip Varga1-11/+1
Fixed compatibility issue between nat ei and nat ed modes. Moved nat syslogging to nat librarry. Deprecating apis that will be integrated in upcoming candidate configuration patch. Type: refactor Change-Id: I334b1b05b81b74667c5c76a05f768442e0dcf7e8 Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-11-13nat: api,cli and test update & cleanupFilip Varga1-12/+59
Cleanup of print functions in api file, splitting functionality of cleanup callbacks for ED and EI NAT. Updating and fixing API & CLI calls. Type: refactor Change-Id: I7a9dc4c8b1d2ca29db4754be7dfa4f698942127a Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-11-03nat: bihash: fix buckets calc and remove mem paramKlement Sekera1-4/+0
Calculate bihash buckets as n_elts / 2.5 rounded to closest pow2 per Damjan's recommendation. Remove memory configuration parameters because bihash init ignores them anyway as it resides in main heap now. Type: improvement Change-Id: I189f463f3c4640106cce4f12d3c5a62969276a82 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2020-10-23nat: nat44 enable/disable dynamic configFilip Varga1-9/+77
This patch changes initialization and configuration of NAT plugin. Instead of allocating data structures at vpp plugin initialization phase allocation and configuration happens after calling enable API or CLI call. This reduces base VPP memory footprint and also enables dynamic reconfiguration of the NAT plugin. Type: improvement Change-Id: I42c069ee19a0311d043ac1f3f230d87bc8d2680f Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-10-08nat: use proper type for countersKlement Sekera1-2/+2
Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: I330822c5d675cdfa57ab75ceb0223f11e0ebb7d2
2020-10-07nat: move nat64 to a subfeatureFilip Varga1-18/+0
Type: refactor Change-Id: I3b9e17164647d2019b1f40cffeed63393345219e Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-09-11nat: Fix next feature for ED with multiple workersVladimir Isaev1-0/+1
Multiple (> 1) workers leads to handoff node being enabled. This node pops next feature index to nat.arc_next to make sure that packet will be pushed to the next feature in the arc. But node nat44-ed-in2out-output also pops next feature and changes arc_next. So actual next feature will be skipped in that case. It leads to all nat44-ed-in2out packets being dropped if we have multiple workers (handoff node enabled). To resolve this a new node was added (nat-pre-in2out-output) to fill arc_next in single worker case and multiple worker case is already handled by handoff node. Type: fix Signed-off-by: Vladimir Isaev <visaev@netgate.com> Change-Id: I9dfba68f00164d2d5ab867224871811bef4411ed
2020-09-02nat: twice-nat static mapping pool addressFilip Varga1-16/+40
Let twice-nat static mapping pick specific address from the twice-nat pool. Type: improvement Change-Id: Iadaa036af2fa3b0e6e9a68ff6e68b4bbe1650eb1 Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-08-20nat: fixed cli nat summary and nat limitFilip Varga1-0/+11
Type: fix Change-Id: I78017b02015116f93b579c7381119f618351c98d Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-08-17nat: sessions get expired when fib table removedFilip Varga1-1/+31
fib table removal would leave lingering sessions in vpp this patch is aimed at solving this issue by grouping sessions by source and destionation fib. if one of the fibs gets removed this grouping is tagged as expired and session won't be passed to non existing fib table Ticket: VPPSUPP-93 Type: improvement Change-Id: I45b1205a8b58d91f174e6feb862554ec2f6cffad Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-08-13nat: move deterministic nat to det44 sub featureFilip Varga1-69/+0
Type: refactor Change-Id: I0bb203102a0e13dd7448e2125925ab356bbd7937 Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-08-13nat: remove non-error error countersKlement Sekera1-17/+58
Some statistics counters were implemented as error counters. Move them to stat segment, where they belong. Type: improvement Change-Id: I5600bec1b4e0496282297374ec1e79d909cdaf8a Signed-off-by: Klement Sekera <ksekera@cisco.com>
2020-06-22nat: set buf error if can't create userKlement Sekera1-8/+2
Type: fix Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: I747d78966a7296dcbae54d54b0c165d407c8863d
2020-06-11nat: simplify bihash buckets/mem configKlement Sekera1-2/+3
Derive reasonable values from max translations/max users. Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: I41a96ab63ab138b4160cd60bd6df24fc73791c86
2020-06-08nat: more long read after short write optimizationKlement Sekera1-58/+76
Replace whitespread (mis)use of snat_session_key_t by proper function arguments where applicable and inline functions to calculate hash keys instead of using structs for that. Make all hash tables use same network byte order port so that there is no longer a discrepancy between static mappings using host byte order while in2out/out2in tables using network byte order. Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: I80786d2f947c67824c101a13bb608f1fe1080f34
2020-06-04nat: add tracing for nat44-hairpinningKlement Sekera1-2/+4
Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: Ife437f959e29d3de88bd7ee77221ada86fb03e80
2020-06-03nat: refactor mss_clamping to not depend on snat_main_tOle Troan1-1/+0
Type: refactor Signed-off-by: Ole Troan <ot@cisco.com> Change-Id: I1110e425859a4f1f07952c91b50f263cb7323836
2020-05-14nat: "users" dump for ED-NATKlement Sekera1-0/+1
Since the removal of "users" concept in ED-NAT nat44_user_dump API returns empty array. This brings back previous behaviour at a considerable runtime cost until a better API is introduced. Type: improvement Change-Id: I5a45923cfeb6b8ebe6fc906601264d6567386991 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2020-05-14nat: remove unused codeKlement Sekera1-1/+0
Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: I95286d6723fd1860bf6bb0e81c474d732ab25121
2020-05-14nat: ED: store both thread&session idx in hashKlement Sekera1-1/+5
By storing thread and session index in hash table we are able to skip multiple hash lookups in multi-worker scenario, which were used for handoff before. Also, by storing sesion index in vnet_buffer2, we can avoid repeating the lookup after handoff. Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: I406fb12f4e2dd8f4a5ca5d83d59dbc37e1af9abf
2020-05-13nat: fix LRU blocked by inactive sessionKlement Sekera1-18/+10
This fixes a situation where long-lived inactive session blocks LRU list. Solution is to have multiple LRU lists based on session type. This helps because session timeout is same for all sessions of same type. Type: fix Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: I5e54b2aab73b23911d6518d42e8c3f166c69a38c
2020-05-13nat: perf improvement - replace branchy codeKlement Sekera1-24/+11
Use a lookup table instead. Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: Ia8461099828bb8824bf016201f135e6b69c444d1
2020-05-13nat: handoff next node feature fixFilip Varga1-2/+3
Type: fix Change-Id: I14e323e7bb1db7a3d40668212535c07504374e59 Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-05-08docs: fix merge damage in nat.hDave Wallace1-4/+0
Type: fix Fixes: b5a575b09 Signed-off-by: Dave Wallace <dwallacelf@gmail.com> Change-Id: I22d35159a923075243df9760f1a74e2ca74e30e1
2020-05-08nat: fix per thread data vlib_main_t usage take 2Ole Troan1-3/+0
The original fix access vlib_main before these was initialized. Removed cached vlib_mains structure. Type: fix Fixes: 9bb09afb56b1aa787ca574cc732085272059fd5f Signed-off-by: Ole Troan <ot@cisco.com> Change-Id: I686bab9220e27891f66bf60489c1602855786aa8 Signed-off-by: Ole Troan <ot@cisco.com>
2020-05-07nat: fix per thread data vlib_main_t usageFilip Varga1-32/+34
Type: fix Change-Id: If6784c9eb278f525e05304d10fd1a00641faaaf0 Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-05-06docs: clean up make docs jobPaul Vinciguerra1-9/+23
Type: docs Change-Id: I9b5e5137eb4c1e89f6e8d7a278cd11a0fd496471 Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
2020-05-06nat: enable force session cleanupFilip Varga1-1/+15
Force session cleanup drops NAT db. Also fixing user specific cli/api calls. Type: improvement Change-Id: Ia3e25fcf07fe5fb9a83d55c03fe90aca727b41ac Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-05-04nat: per vrf session limitsFilip Varga1-0/+13
Type: improvement Change-Id: I170256ab47978db34fb0ff6808d9cd54ab872410 Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-04-28nat: remove unused codeKlement Sekera1-9/+0
Type: refactor Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: I0f82d937b4829e5a7f074d4d566fa49319a11716
2020-04-27nat: improve perf - long read after short writeKlement Sekera1-17/+0
Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: Idbbad246161d28f595c25e10d7282c8b33fa9876
2020-04-24nat: ignore user hash in ED NATKlement Sekera1-3/+2
With port overloading, port is no longer a scarce resource and there is no need to limit connections per internal IP. This saves one hash insert in slow path. Type: improvement Change-Id: I8a7a9713ac855fa99fa1617ec684f757cf6e09ae Signed-off-by: Klement Sekera <ksekera@cisco.com>
2020-04-24nat: make usage of vnet_buffer2 transparentKlement Sekera1-8/+0
Type: fix Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: I50df248afb3f6b46c49e6695b3f124cfd584f016
2020-04-24nat: ED: reduce number of hash tables usedKlement Sekera1-23/+2
Use out2in_ed hash table for port overloading tracking instead of global table. This reduces number of hash insertions in slowpath. Type: improvement Change-Id: Iad4e897d52033beb7f6d76a7ddb596eef586c6cb Signed-off-by: Klement Sekera <ksekera@cisco.com>
2020-04-20nat: remove unused codeKlement Sekera1-14/+0
Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: If5c00faa309cf3e1ea8bdf8b23250041f6a499c4
2020-04-16nat: scavenging functionality removedFilip Varga1-13/+0
Type: refactor Change-Id: I9f743ba2818e1b1c5004c3575925cc7b479948d8 Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-04-08nat: use correct data types for memory sizesKlement Sekera1-2/+2
Type: fix Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: Id2d181385f109163d4c806eecda166c2087c4b92
2020-04-08nat: ED: global session LRU listKlement Sekera1-0/+8
Maintain a global session LRU allowing reuse of expired session instead of relying on a scavenging mechanism to periodically walk sessions. Whenever a new session is being allocated in slow path, also attempt to free an expired session from global LRU list. Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: I9edde9ec138de67c9a4888e915b0490ec16415fa
2020-04-07nat: ED: port re-use algorithmKlement Sekera1-1/+25
Type: fix Change-Id: I11440c855eb35d2a6095dfe135e4ab5090f11ff3 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2020-04-07nat: don't drop packet for expired sessionKlement Sekera1-2/+0
If session is expired, the packet which we just received might be a one, which legitimely creates a new session, process it in slow path instead to decide the outcome. Type: fix Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: I45628f52d37ae9dee5e8aa58171ff0b86f91f5dd