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2020-02-06tcp: improve lost rxt heuristicFlorin Coras1-0/+5
Type: feature - retransmit first unacked segment if newer retransmitted packets are acked - avoid spurious retransmits if recovery ends with sacked bytes Change-Id: Ic1b56d22e025822edb7609afb136e47440ea6032 Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit b3dce89a768aaffa2a830ba6579cd3d9c8cd967a)
2019-11-28tcp: close session on retransmit failureFlorin Coras1-0/+1
Type: fix Since the connection is closed, also mark the session as closed. Change-Id: Ica3849c3ff12fa7a65ba64e563a60d6c94f5ceca Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit 52be67435eb4615b899950b42b8ff72d258fbcb3)
2019-11-28session tcp: refactor pacer timeFlorin Coras1-11/+3
Type: refactor Change-Id: Ic1c3e1f7987702cd88972acc34849dc1f585d5fe Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit a8e71c8981f039588a7ca94e6ab66b4ebac784a5)
2019-11-18tcp: avoid retransmits post resetFlorin Coras1-0/+3
Type: fix Change-Id: Ib6a8f5ca597389700e5746f089a5cec7eee65ab5 Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit fd4c3fe364becc02527ed5f9088d904c7bc34a6f)
2019-11-18session tcp: infra for transports to send buffersFlorin Coras1-56/+7
Type: feature Add infra that allows transpors to enqueue pending buffers without the need to build and manage their own pending frames. An important benefit is the fact that buffer wire/tx ordering is ensured by session layer. Change-Id: I764fd1693d610b321a1d0c84b648a314f14583db Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit 2a7ea2ee92d6dc4800ee21323d3324a9e8449dcf)
2019-11-12tcp: fix retransmit with no sacksFlorin Coras1-7/+11
Type: fix Change-Id: I6f7df0d358f57f7feadb9b7a3fcffb99558b2af8 Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit bf1f8b7f288c29bfcc128b1d09eae1c1eac2b7cc)
2019-11-05tcp: avoid sending acks when data availableFlorin Coras1-4/+19
Type: fix Change-Id: I02e2cb2d349f9ddb2bfed040a08ca448f379d565 Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit cb711a4ec908b89edc9da29d3c2e093dab85fbbf)
2019-10-31tcp: improve rate samples for retansmitted segmentsFlorin Coras1-8/+19
Type: fix - Initialize max_seq on both transmitted and retransmitted segments - Keep track of segments that have been sacked. - Track new data segments sent during recovery Change-Id: Ice55231a3da200ae6171702e54b2ce155f831143 Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit d6ae4bf13a7819d64d128d196d491af4700fa948)
2019-10-31tcp: fix sack retransmit beyond snd_nxtFlorin Coras1-2/+7
Type: fix Ensure that sack retransmit logic does not try to inadvertently send new data. Change-Id: Idfda19643577d9c1b58e2af8d8283cabfbaf98e6 Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit 81cb8e4092991d3fd1e24f0862c12548a2d4c714)
2019-10-31tcp: avoid head retransmit if scoreboard has no holesFlorin Coras1-1/+2
Type: fix Change-Id: I6164ad0d97cd91b60c85302eff691836d12a0a70 Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit 8a8b05c526883fe34b83239a3c4f56087d1df9e5)
2019-10-29tcp: refactor flags into cfg and conn flagsFlorin Coras1-9/+9
Type: refactor Change-Id: Ib5e2ecf55732599e1322736e3662178c9da49c7d Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit bbcfaac9571004d87998684c123354667b726532)
2019-10-29tcp: improve pacing after idle send periodsFlorin Coras1-48/+65
Rest pacer on ack reception if we haven't recently sent anything. Type: feature Change-Id: I820bacd81b65130052dfafbfcbe6ca4553069fbc Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit c31dc31f84961033ecb6354811e0c360b6cf5f79)
2019-10-27tcp: retry lost retransmitsFlorin Coras1-5/+39
Add heuristic that detects lost retransmitted segments and retries sending them. Type: feature Change-Id: I34d1bb16799e1993779222eb2bfad4b40704159e Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit be237bf02382854118986e8ea84c7544e42023f2)
2019-10-22tcp: fix tso not work in single buffer issueSimon Zhang1-5/+8
Type: fix Signed-off-by: Simon Zhang <yuwei1.zhang@intel.com> Change-Id: Iddb6fd41812e8c97af58859ef43279cfc0f9d1df Signed-off-by: Simon Zhang <yuwei1.zhang@intel.com> (cherry picked from commit 8a047ed741072bdb8d93b0841473eae06ae3c9d0)
2019-10-18tcp: rate sample for persist segmentsFlorin Coras1-0/+6
Type: fix Change-Id: I7c38d2ad6364f098529f51c15b533eb234b82716 Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit dd60b1b128d8d6c07dc8b8bcbf932b808cedbaab)
2019-10-10tcp: custom checksum calculations for Ipv4/Ipv6Srikanth A1-22/+94
Type: feature Based on the configuration, we can disable checksum offload capability and calculate checksum while pushing the TCP & IP header. This saves some cycles when VPP stack is used in legacy hardware devices. Signed-off-by: Srikanth A <srakula@cisco.com> Change-Id: Ic1b3fcf3040917e47ee65263694ebf7437ac5668
2019-10-02tcp: use sacks for timer based recoveryFlorin Coras1-70/+118
Type: feature If available, reuse sack scoreboard in timer triggered retransmit to minimize spurious retransmits. Additional changes/refactoring: - limited transmit updates - add sacked rxt count to scoreboard - prr pacing of fast retransmits - startup pacing updates - changed loss window to flight + mss Change-Id: I057de6a9d6401698bd1031d5cf5cfbb62f2bdf61 Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit 36ebcfffbc7ab0e83b4bb8dfaec16bf16cafb954)
2019-09-29tcp: enable gso in tcp hoststackSimon Zhang1-0/+28
Type: feature Change-Id: If68d07fbe8c6f7fffd2f93c7e854367082927e4f Signed-off-by: Simon Zhang <yuwei1.zhang@intel.com> (cherry picked from commit 1146ff4bcd336d8efc19405f1d83914e6115a01f)
2019-09-29tcp: send rwnd update only if wnd is large enoughFlorin Coras1-7/+7
Type: feature Change-Id: I3e97e05a31806afb6b2e84ecf05fb96d285db92e Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit 017dc45243bad1b3708d0a9b902d23ca47859344)
2019-09-29tcp: force zero window on full rx fifoFlorin Coras1-1/+4
Type: feature Change-Id: I7c5684a9f88e56fd62d83a59c14c4e4a6f096b89 Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit 182d2198332c2a20891a7cdbceeaaf62b47924e8)
2019-09-29tcp: validate connections in outputFlorin Coras1-9/+46
Type: feature This shouldn't happen unless connections are removed after buffers were enqueued to tcp-output and before tcp-output runs. For instance, packet is enqueued to tcp output and cleanup is called for connection. Change-Id: Ib7dd82ffa6cfb21ff5068aba010e0a3497eeea13 Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit 78dae00881d26b205ee6721ce8c2bcae76996e79)
2019-09-29tcp: improve mss computationFlorin Coras1-41/+5
Type: fix Use different mss for v4 and v6 packets. Change-Id: Ifcd322c1fd74f749a42bae671dd6cfed8c32b150 Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit cedcf608fefc5bdeff13bb0914fa15266e971d7c)
2019-09-24tcp: add option for always on event loggingFlorin Coras1-19/+19
Type: feature Add option to always compile in debugging infra. Debug verbosity can be controlled via configuration updatable via cli. Compile time inclusion and configuration of event logging verbosity is still available in order to minimize event logging impact. Change-Id: I9d946efe9fa4204fdace1adb1d6588c97b5ae758 Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit a436a42221280888acd09858c7353e694c359bca)
2019-09-21tcp: forward conn resets through tcp-outputFlorin Coras1-32/+20
Type: refactor Change-Id: I5718853d89ebeae9d66be975a803a3674bec5986 Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit df36f4963f1a590ce9a02f048507c3d4590580ae)
2019-08-14tcp: extend protocol configurationv19.08-rc2Florin Coras1-14/+6
Type: feature Ticket: VPP-1736 Expose more configuration parameters and refactor some of the existing ones. Change-Id: If44c31ff77ce3d7e8da67d39a4ff61346bdf5ccc Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit 9094b5c319d3f072d3c248fe7c876e4048c13ac2)
2019-08-09tcp: cleanup timersFlorin Coras1-82/+96
Type:refactor Change-Id: I37dbc8b55827d66c2578d6ab8b86ed7e18198aa6 Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-08-02tcp: add more connection statsFlorin Coras1-3/+12
Type:feature Change-Id: If02884d0f1f26bfe31ec609ea9611cb27b699868 Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-08-01tcp: honor snd_wnd in fast rxtFlorin Coras1-1/+4
Type:fix Change-Id: I2f4224a53360f533c086ebde6a3056e60431da87 Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-07-26tcp: count resets sentFlorin Coras1-0/+4
Type:feature Change-Id: Ie1ab4b24af9c654d5e0ed94b7fa96ca195b01c56 Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-07-26session tcp: handle rxt and acks as custom eventsFlorin Coras1-52/+115
Type: feature Control ack generation and retransmissions with session layer scheduler. Change-Id: Iacdf9f84ab81f44851980aa45a83e75f29be2b7b Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-07-05tcp: timestamp adjustmentVladimir Kropylev1-2/+2
Type: feature Change-Id: Icb3c574100cde95ab5be4923c8739889cf7e48c6 Signed-off-by: Vladimir Kropylev <vladimir.kropylev@enea.com>
2019-07-05tcp: add cc algo start tx eventFlorin Coras1-0/+3
Type: feature Notify cc algos that new data is sent on a connection that was apparently idle. Change-Id: I892e5e9bb5b88d791265ffbbefce6f9694d01970 Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-07-05tcp: add loss signal to cc algoFlorin Coras1-14/+11
Type:feature Change-Id: Ibe1a4c555b55fb929d55b02599aaf099ed522cdf Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-06-25tcp: window update ackVladimir Kropylev1-0/+27
Type: feature Provide interface for sending Window Update ACK, ensuring it will be sent only once, if RWND became non-zero, after zero RWND has been advertised before. Change-Id: I7f0d8af76d7763208625df68ab4ac3727fdaf449 Signed-off-by: Vladimir Kropylev <vladimir.kropylev@enea.com>
2019-06-25tcp: delivery rate estimatorFlorin Coras1-1/+20
Type: feature First cut implementation with limited testing. The feature is not enabled by default and the expectation is that cc algorithms will enable it on demand. Change-Id: I92b70cb4dabcff0e9ccd1d725952c4880af394da Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-06-21tcp: add option to pass opaque to next nodeFlorin Coras1-1/+5
Type:feature Change-Id: I0b72954a6ae6a05abe0761cb4f227072863f127b Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-06-18tcp: allow custom output next nodeFlorin Coras1-0/+3
Type: feature Change-Id: If9804d3685d2a52efa06e412ae1ebb39c6a44b8b Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-06-12tcp: better estimate snd space for rxt with no sacksFlorin Coras1-2/+2
Type: refactor Use tcp_available_cc_snd_space instead of sack scoreboard last_delivered_bytes to estimate available space when retransmitting with no sack support Change-Id: I938c637279eaf8c5634c4e97f0633fa2d0054fac Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-06-08tcp: close connection if not recovered after max triesFlorin Coras1-0/+13
Type: feature Change-Id: Ia8af6a62a2be2265bc42955d90e8c2222bdb8f50 Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-04-02tcp: improve rcv process ack processingFlorin Coras1-1/+0
- Avoid doing cc in closing states. - Rest connections closed with unread data Change-Id: I97d46b0459f03ea5439eeb0f233b6c17d3e06dfd Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-03-29tcp: remove sent rcv wnd 0 flagFlorin Coras1-10/+0
Change-Id: If6c672d1caa8884eb5d819311606a79a3de81200 Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-03-29tcp: improve updating of rcv wndFlorin Coras1-10/+7
Change-Id: I0b8a311979d3ccd15f3854e7ac44ca9951dc6ce4 Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-03-28tcp: remove unused buffer flagsFlorin Coras1-3/+0
Change-Id: I86e71f32dee3cc48f680e6432a96caef0a7f66a1 Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-03-23tcp: make default mtu configurableFlorin Coras1-6/+2
Change-Id: I56d8d8d67d5590e24c1ddb54b0c63a2cb03798e1 Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-03-22tcp: improve handling of snd_nxtFlorin Coras1-57/+38
- avoid changing snd_nxt when doing fast retransmits - use snd_una_max only to keep track of the max seq number sent - simplify future ack testing Change-Id: I3580ad3aefe30128486c3375d0ac3f3f62c04c5e Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-03-13tcp: avoid computing flags in push hdr inlineFlorin Coras1-26/+3
Change-Id: I579eef6d70b94b20e22b7b116ac63b2d7af49b22 Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-03-08tcp: fix rcv_wnd computationFlorin Coras1-1/+1
Change-Id: I3cecffae2e30233d4725bd3eaf5ff4a8ff194fae Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-03-08session/tcp/vcl: fixes and optimizationsFlorin Coras1-1/+2
Change-Id: Idc7dfe743399dd8dee0f6b3ec83f194f3fca580b Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-03-08tcp: fix window probes in fin-wait-1Florin Coras1-14/+9
Change-Id: Idf060f385f4d9b2f42fdab6a1d372727beb8b19e Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-03-06tcp: migrate old MULTIARCH macros to VLIB_NODE_FNFilip Tehlar1-28/+17
Change-Id: Ifd9fa30eed343e2c5d40582b3e3aa589b070637d Signed-off-by: Filip Tehlar <ftehlar@cisco.com>