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2020-11-13nat: cleanup & reorganizationFilip Varga1-1/+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>
2020-11-05nat: remove unnecessary codeKlement Sekera1-14/+19
Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: I478f5dcbf7595c62611d25a40aa356d8ce09d216
2020-10-21misc: minimize dependencies on udp.hFlorin Coras1-1/+1
Type: improvement Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: Id13f33843b230a1d169560742c4f7b2dc17d8718
2020-10-14nat: Fix ICMP bypass session creationVladimir Isaev1-0/+6
After get_icmp_o2i_ed_key() bihash key may include IP protocol and addresses from inner ICMP packet. It is OK for session lookup, but we should not create a session on ICMP error message receiving. Type: fix Signed-off-by: Vladimir Isaev <visaev@netgate.com> Change-Id: Ic93272ebe90d2288a975265439f9e079eb28936a
2020-10-12nat: set fib index for bypass sessionVladimir Isaev1-1/+1
Bihash key already contains rx_fib_index for lookup but fib value for session itself is set to 0. In the result bihash is allocated with key with fib index set, but free function is looking for key with fib index set to zero. It leads to use-after-free because session itself is removed from pool but bihash is not because of key mismatch. Type: fix Signed-off-by: Vladimir Isaev <visaev@netgate.com> Change-Id: I8ac5a41b0a5a32b1baab9e9d757141d5b24b7798
2020-10-09nat: ipfix logging separation & refactorFilip Varga1-15/+15
Type: refactor Change-Id: I8785e4987e4f60361072440d0c3c6954c9c12394 Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-10-07misc: Purge unused pg includesNeale Ranns1-1/+0
Type: style Signed-off-by: Neale Ranns <nranns@cisco.com> Change-Id: I26a19e42076e031ec5399d5ca05cb49fd6fbe1cd
2020-09-02nat: twice-nat static mapping pool addressFilip Varga1-32/+118
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>
2020-08-17nat: sessions get expired when fib table removedFilip Varga1-2/+19
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: remove non-error error countersKlement Sekera1-55/+34
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>
2020-07-15nat: add prefetching to in2out_ed/out2in_edKlement Sekera1-1/+14
This saves about 20 clocks/packet in both code paths. Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: Ib559c74bf8168e3ddd764d51b7e5bcd2a557f591
2020-06-27nat: replace speculative buffer enqueue modelKlement Sekera1-476/+439
Replace speculative buffer enqueue coding model with vlib_get_buffers(...)/vlib_buffer_enqueue_to_next(...). Type: improvement Change-Id: I7dbfac2234a7bd754c599857eb1d5b601da5bc7c Signed-off-by: Klement Sekera <ksekera@cisco.com>
2020-06-08nat: more long read after short write optimizationKlement Sekera1-99/+120
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: fixed input validationFilip Varga1-1/+0
Ticket: VPP-1887 Type: fix Change-Id: I341ac7b455926a106d736f4de6771aae655db82e Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-05-14nat: ED: store both thread&session idx in hashKlement Sekera1-26/+76
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 Sekera1-10/+11
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 Sekera1-15/+15
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/+2
Type: fix Change-Id: I14e323e7bb1db7a3d40668212535c07504374e59 Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-05-08nat: fix per thread data vlib_main_t usage take 2Ole Troan1-6/+7
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 Varga1-3/+6
Type: fix Change-Id: If6784c9eb278f525e05304d10fd1a00641faaaf0 Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-05-04nat: per vrf session limitsFilip Varga1-4/+12
Type: improvement Change-Id: I170256ab47978db34fb0ff6808d9cd54ab872410 Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-04-27nat: improve perf - long read after short writeKlement Sekera1-73/+68
Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: Idbbad246161d28f595c25e10d7282c8b33fa9876
2020-04-24nat: ignore user hash in ED NATKlement Sekera1-41/+7
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 Sekera1-4/+4
Type: fix Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: I50df248afb3f6b46c49e6695b3f124cfd584f016
2020-04-24nat: ED: reduce number of hash tables usedKlement Sekera1-10/+0
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>
2020-04-08nat: ED: global session LRU listKlement Sekera1-5/+1
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 Sekera1-0/+10
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/+2
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
2020-03-31nat: fix unknown proto translation out2in_edAlexander Chernavin1-2/+2
An unknown proto packet can be processed as UDP with destination port rewriting which breaks the original packet. With this commit, stop processing unknown proto packets after nat44_ed_out2in_unknown_proto() execution. Type: fix Change-Id: Iea93faf3c282f542d5ee7120c15e1027c1e4abc9 Signed-off-by: Alexander Chernavin <achernavin@netgate.com>
2020-03-26nat: transitory timeout for TCP CLOSED stateKlement Sekera1-8/+38
Wait transitory timeout seconds before moving internal state of TCP session to CLOSED state per RFC 7857. This patch implements this functionality for endpoint-dependent NAT. Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: I4491d831cd9edf63fae520a516cdbe590bac85db
2020-03-25nat: fix error countersKlement Sekera1-0/+5
Type: fix Change-Id: I021b1427362f4bdba1c0ebc9863c9143dd6b3cb7 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2020-03-13nat: timed out session scavenging upgradeFilip Varga1-2/+15
Patch changes the behavior of session scavenging and fixes multiple nat issues. Allows proper session clearing and removes issue with lingering sessions in session db. Patch also updates and fixes CLI/API calls for better readability of session state metrics. Fixes security issue that would allow attacker to reuse timed out session in both directions (in2out/out2in). Type: improvement Signed-off-by: Filip Varga <fivarga@cisco.com> Change-Id: I78897585a2a57291fad5db6d457941aa0a0457bd
2020-02-20nat: nat44 split slow and fast pathFilip Varga1-567/+169
Type: improvement Change-Id: I07c7e1c154583906ac9af958f22ed9a1be382f4a Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-01-17nat: refactor of port/address allocation functionsFilip Varga1-4/+4
Change-Id: Ie2a3c0f44322dd8415603b7ce51bb72d72769c95 Ticket: VPP-1815 Type: refactor Signed-off-by: Filip Varga <fivarga@cisco.com>
2020-01-03nat: use SVRKlement Sekera1-546/+221
Remove NAT's implementation of shallow virtual reassembly with corresponding CLIs, APIs & tests. Replace with standalone shallow virtual reassembly provided by ipX-sv-reass* nodes. Type: refactor Change-Id: I7e6c7487a5a500d591f6871474a359e0993e59b6 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2019-12-12nat: session cleanup fixFilip Varga1-0/+3
Ticket: VPP-1795 Type: fix Change-Id: Ib3b5742119d7013c293a11eb3dd1aadf46b422dd Signed-off-by: Filip Varga <fivarga@cisco.com>
2019-11-19nat: respect arc features (multi worker)Filip Varga1-139/+138
Type: fix Ticket: VPP-1747 Change-Id: If282aae3e584d7017c200f897b99c8a37eb1b2e5 Signed-off-by: Filip Varga <fivarga@cisco.com>
2019-11-05nat: respect udp checksumFilip Varga1-26/+101
Type: fix Change-Id: I732be02d2e2b854eb589c3fa10f980ef2dbe8dfc Signed-off-by: Filip Varga <fivarga@cisco.com>
2019-11-04nat: revert respect udp checksumOle Troan1-101/+26
This reverts commit 0d75f783644a24b219ed79d9f9c17387783f67ca. Type: fix Signed-off-by: Ole Troan <ot@cisco.com> Change-Id: Iaf33301201897e6646eba2b4157e2a45f5fd30f2
2019-10-28nat: respect udp checksumFilip Varga1-26/+101
Type: fix Change-Id: I73895fa0101bd50483160c8dc6faac2c67513077 Signed-off-by: Filip Varga <fivarga@cisco.com>
2019-08-22nat: handoff traffic matching for dynamic NATFilip Varga1-79/+3
Type: feature Change-Id: I5c5af6f9acb340cc674323305104b8ce23e6d21d Signed-off-by: Filip Varga <fivarga@cisco.com>
2019-07-31nat: elog rewrite for multi-worker supportFilip Varga1-17/+17
Type: fix Change-Id: I04f136a04bc022d223e4bcb5c59920bd1f1fd560 Signed-off-by: Filip Varga <filipvarga89@gmail.com>
2019-05-30NAT: create bypass in correct thread if workers>1Alexander Chernavin1-9/+40
Change-Id: I70817579a09a7026f5fa7c8e71babded891ea285 Signed-off-by: Alexander Chernavin <achernavin@netgate.com>
2019-04-26nat: fix ED mode unknown proto session managementMatthew Smith1-1/+10
In endpoint dependent mode, when a session at the head of a user LRU is reused, if the IP protocol for that session was unknown (any other than tcp, udp, or icmp), the attempt to delete the session mapping from the in2out bihash was not using the same key that was used when the mapping was added. This would cause the deletion of the mapping to fail. If packets arrive later which match the original session, the search for the session key would succeed when it should have failed and the session, which is now associated with a different pair of endpoints, may end up being updated when it should not be. Update the key generation when reallocating an existing session to do the right thing if the session is for an unknown protocol. Also update format_nat_session() for unknown protocols so that 'vppctl show nat44 session detail' will display the protocol correctly. In endpoint dependent mode, the IP protocol is stored in the port field on a session if the protocol is unknown. The value is stored in host byte order, but the format function was swapping the bytes before writing the protocol. Change-Id: I9e8daadd4569cb2610532dab4e4f41d1567cf3d1 Signed-off-by: Matthew Smith <mgsmith@netgate.com>
2019-02-27NAT44: active-passive HA (VPP-1571)Matus Fabian1-12/+24
session synchronization so that we can build a plain active-passive HA NAT pair Change-Id: I21db200491081ca46b7af3e82afc677c1985abf4 Signed-off-by: Matus Fabian <matfabia@cisco.com>
2019-02-18NAT: VPP-1552 code migration from old multiarch schemeFilip Varga1-31/+16
Change-Id: I88f3df8aaa521e7707ef3335acdbf1ab41e7ee28 Signed-off-by: Filip Varga <fivarga@cisco.com>
2019-01-21NAT: VPP-1537 IPFIX per worker processingFilip Varga1-3/+5
Change-Id: I428bd25a513eb9fe65bea56572fea8cab7c51681 Signed-off-by: Filip Varga <fivarga@cisco.com>
2018-12-14NAT: counters (VPP-1484)Matus Fabian1-12/+48
Change-Id: I5d1852a09712adfe7547c200d161539736aca6f5 Signed-off-by: Matus Fabian <matfabia@cisco.com>
2018-11-29NAT: syslog - sessions logging (VPP-1139)Matus Fabian1-0/+21
Change-Id: I6e0b7cf37c1a9ac66f8ac011db29504e57844ee9 Signed-off-by: Matus Fabian <matfabia@cisco.com>
2018-11-19NAT44: fix bug in TCP close with output-feature interface (VPP-1493)Matus Fabian1-1/+30
Change-Id: If8c883d6b1ee58de9a03012d3567ec82211a0225 Signed-off-by: Matus Fabian <matfabia@cisco.com>