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2019-05-25tcp: handle disconnects in rcv-processFlorin Coras1-0/+1
Change-Id: I86b025d36aedad2bf4afd6137f5b708677720f0e Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-05-24Fix congestion recovery checkv19.01.3-rc0John Lo1-2/+4
Change-Id: Ia9347c8cb6175c6bec3f9c27a7e0a71c4e58fe28 Signed-off-by: John Lo <loj@cisco.com>
2019-03-01tcp: allow future acks if in windowFlorin Coras1-4/+9
Change-Id: I84ad1830b8db43f6031cf2876cd94f6a71216b83 Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit 5fd3210be3a043c12c598df3d75dbe0aa606bfe5)
2019-02-22tcp: free sack block list on connection cleanupFlorin Coras1-0/+2
Change-Id: I7152b4ae64528082765726d5844580aad54c0c70 Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-02-07tcp: fix reset sending in syn-sentFlorin Coras3-6/+7
Change-Id: I468b1015bca5f95b162fb49e904aa4e4d38db75e Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit d4c49be5e20406220cf89083c9df86c3c0761a81)
2019-01-20tcp: fix debugging without cc stats (VPP-1547)Florin Coras1-0/+1
Change-Id: I376856fcadce570bb555064435f5876eefb2befa Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit 0702554639e5149d9012cc196aa43c3c8d0d7f9b)
2019-01-18tcp: allow data in passive open ack (VPP-1545)Florin Coras1-2/+3
Change-Id: Iceb99d3f8b7029bd1b1e9ebafb1e0b3790c573e4 Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit 865872ebdb2bbaf3f157e2a9889405b84114d2eb)
2019-01-12session: generate wrong thread errors instead of crashingFlorin Coras2-6/+7
Change-Id: I7e59ae718d2722c49d42b22a0874e1645a191e89 Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-01-04tcp: fix reset in syn-sentFlorin Coras1-2/+1
Change-Id: I6732adc06fbb3d4b427e671ddcfe6eabc08d4a1b Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-01-03tcp: add more closing state arcsFlorin Coras1-0/+19
Change-Id: If6f4d6404753b2d6b96e17f5414079bcdb9edde8 Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-01-03tcp: better randomize issFlorin Coras2-4/+41
Change-Id: I3638221e59024d6b7d82499d57e25b8e609f73cb Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-01-01buffers: remove unused codeDamjan Marion1-2/+1
Change-Id: If2bbfbc52994f5de0879763e0b7a7864498debb6 Signed-off-by: Damjan Marion <damarion@cisco.com>
2019-01-01vcl/ldp: add write msg function and fine tuningFlorin Coras2-4/+7
Allows app to push data. Additionally, ensure reset/close replies are not sent unless vcl closes the session. Change-Id: Icbbf933cf57b55cfbcc7b802af0f83919a066f65 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-28session: free session after transport and app confirmFlorin Coras2-9/+9
In addition to that, a bit of refactoring. Change-Id: Iea1eabc2167bcdef185ec53bc09bae087c5398e6 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-26tcp: add more last-ack arcsFlorin Coras1-0/+19
Change-Id: If538bb9d6fb489906099b727a7bfdb9d9af29402 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-26tcp: separate active and passive establish timersFlorin Coras5-94/+107
Change-Id: Ia2241e963cf45765d8d17c65eea781edbf74d4f9 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-25tcp: add fin-wait-1 dispatch arcsFlorin Coras1-0/+19
Change-Id: Ie4cb08f5d9f7fd025f1a8ae610cebb0b0c315d9f Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-24tcp: compute seq_end in tcp_inputFlorin Coras3-50/+41
syn/fin are no longer added to seq_end so they must be considered individually in each state. Change-Id: I5e3047194101c4fca2db9f9ad29a4a6468c397ab Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-22tcp: improve waitclose in closing statesFlorin Coras4-17/+64
Change-Id: I90056176194cb2a144d49a3cb283653d8d30f051 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-21tcp: fix fin_wait_1 condition to send finFlorin Coras2-2/+6
Also add the closed-waiting session state wherein the session still allows the transport to send oustanding data. Change-Id: Ic47807379906ef2010934381ff0b9e53c7e631d8 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-20tcp: fix syn-sent resetFlorin Coras1-7/+9
Change-Id: I4a811672b27c70bf0e9652c175c7f4168ec40ed7 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-19session: add cli option to dump session elogFlorin Coras1-0/+1
Change-Id: I1f42644f143bb65ee764c0f869b402595126adac Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-19tcp: fix fin in syn-rcvdFlorin Coras2-11/+18
Change-Id: Iba7c08c9edcf76ea24d00d5ea9e0586e9f94df4e Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-19tcp: add more state machine arcsFlorin Coras1-5/+79
This mostly adds explicit drops or resets for state and flag combinations that would've been otherwise dropped with a warning message. It also adds some valid RST handlers. Change-Id: Ib0d19a0939fe275befeb29cf072b87b1a79937ce Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-19tcp/session: notify transport of close when tx fifo is not emptyFlorin Coras3-12/+21
Disconnect transport even if tx fifo is not empty and have transport deal with the problem. In case of tcp, add timer to fin_wait_1. If it expires and we're still in established state, cleanup but only after waiting for session tx events to cleanup. Change-Id: I45759a3c43dd096bb2c03daf5372416c30678d62 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-18tcp/session: drop connections if message queue is fullFlorin Coras2-14/+18
Also cleanup session table when transport closes and app didn't reply to the close notification. Change-Id: Ie3d518e3afff73437561561b46dbf695c24632ad Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-18tcp: cleanup connections if handshake failsFlorin Coras1-3/+2
Change-Id: If109d6772cbd58f4f2a56ae7ec593639d1fa1b96 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-17tcp: fix handling of broken syn optionsFlorin Coras4-5/+15
Change-Id: Ia8b2a077ba4897ddd15cf33221b191cd7a3f1d33 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-17tcp: accept rst that fail pawsFlorin Coras1-9/+9
Change-Id: I945d1644a23b6a3d50c9beaffc732d2b6facd974 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-17vcl/session: handle reset/disconnect before app acceptFlorin Coras1-2/+4
Also further improves reset handling. Change-Id: I6e517632f700f181761726b965134e0c217eb06d Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-13tcp: drop handshake ack with fin setFlorin Coras1-1/+1
Change-Id: I529c34235ad2b0e4c730959bb1b8c9d50a83738c Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-13tcp: fix handling of no wscale in synsFlorin Coras2-1/+6
Change-Id: I7219a8d315b312812acafd9d2709fba8b4a2a679 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-13tcp: validate seq for handshake ackFlorin Coras1-0/+8
Change-Id: Ifc0584d781efc30904069ea17c0afbb68c49c442 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-13session/tcp: support tx flush markFlorin Coras4-1/+26
For tcp this means that the last enqueued data goes out with a psh bit set. Change-Id: I29d357ecae6f02e748b59a7b799150ec73d14ba2 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-07tcp: improve check for invalid sack blocksFlorin Coras1-1/+3
Change-Id: Ic6a6202a2d5aca33eee7fc6ff8eeaa1db9b58525 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-07tcp: measure us rtt with syn-ackFlorin Coras1-0/+1
Change-Id: I20820145377060e12aeeb23b433206c79fd88332 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-07tcp: fix timestamp check and pawsFlorin Coras1-5/+2
Change-Id: I5a5ee48755befc370a1f89ddbb0d91f164ed564f Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-07tcp: better handling of options only allowed in synsFlorin Coras1-9/+18
Change-Id: I6debfe85d9d55f6f9a8ef0ce1dcc008393847a37 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-07tcp: validate connection state in retransmitFlorin Coras1-2/+2
Change-Id: Ia9048bb4e074f7ebc36eb77e542a916924103332 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-07tcp: fix length checkFlorin Coras1-3/+14
Change-Id: Iff75be238a231df88a37b61610c134e4a4770708 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-12-05session/tcp: postpone cleanup on resetFlorin Coras2-2/+8
Change-Id: I45fd7538853f84c6c8bf804cc20acbc9601db3ba Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-11-30Metadata / opaque formatting belongs in vppDave Barach1-0/+2
VPP graph dispatch trace record description: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Major Version | Minor Version | NStrings | ProtoHint | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Buffer index (big endian) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + VPP graph node name ... ... | NULL octet | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Buffer Metadata ... ... | NULL octet | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Buffer Opaque ... ... | NULL octet | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Buffer Opaque 2 ... ... | NULL octet | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | VPP ASCII packet trace (if NStrings > 4) | NULL octet | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Packet data (up to 16K) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Graph dispatch records comprise a version stamp, an indication of how many NULL-terminated strings will follow the record header, and a protocol hint. The buffer index allows downstream consumers of these data to easily filter/track single packets as they traverse the forwarding graph. FWIW, the 32-bit buffer index is stored in big endian format. As of this writing, major version = 1, minor version = 0. Nstrings will be either 4 or 5. Here is the current set of protocol hints: typedef enum { VLIB_NODE_PROTO_HINT_NONE = 0, VLIB_NODE_PROTO_HINT_ETHERNET, VLIB_NODE_PROTO_HINT_IP4, VLIB_NODE_PROTO_HINT_IP6, VLIB_NODE_PROTO_HINT_TCP, VLIB_NODE_PROTO_HINT_UDP, VLIB_NODE_N_PROTO_HINTS, } vlib_node_proto_hint_t; Example: VLIB_NODE_PROTO_HINT_IP6 means that the first octet of packet data SHOULD be 0x60, and should begin an ipv6 packet header. Change-Id: Idf310bad80cc0e4207394c80f18db5f77c378741 Signed-off-by: Dave Barach <dave@barachs.net>
2018-11-26Minor tweaksDave Barach1-10/+11
Significant refit coming soon. Signed-off-by: Dave Barach <dave@barachs.net> Change-Id: If7d196e84354c5088706e2ac81e2add42597a550
2018-11-14Remove c-11 memcpy checks from perf-critical codeDave Barach3-31/+35
Change-Id: Id4f37f5d4a03160572954a416efa1ef9b3d79ad1 Signed-off-by: Dave Barach <dave@barachs.net>
2018-11-13tcp: cubic improvementsFlorin Coras1-9/+25
- avoid cwnd excessive increments on threshold changes - fix K computation when fastconvergence is on Change-Id: I99c36abc879e63aecc0617f7aed5a2f68430ba71 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-11-13tcp: cubic fast convergenceFlorin Coras4-7/+73
Change-Id: I3a15960fe346763faf13e8728ce36c2f3bf7b05a Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-11-12tcp: handle disconnects after enq notificationsFlorin Coras4-37/+93
Make sure that we notify the app of the data enqueued in the burst before notifying of disconnect. Change-Id: I7747a5cbb4c6bc9132007f849c24ce04b7841273 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-11-09tcp: basic cubic implementationFlorin Coras6-14/+258
Because the code is not optimized, newreno is still the default congestion control algorithm. Change-Id: I7061cc80c5a75fa8e8265901fae4ea2888e35173 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-11-08tcp: pacer and mrtt estimation improvementsFlorin Coras5-20/+61
- update pacer once per burst - better estimate initial rtt - compute smoothed average for higher precision rtt estimate Change-Id: I06d41a98784cdf861bedfbee2e7d0afc0d0154ef Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-11-07tcp: consume incoming buffers instead of reusingFlorin Coras4-796/+713
Instead of reusing buffers for acking, consume all buffers and program output for (dup)ack generation. This implicitly fixes the drop counters that were artificially inflated by both data and feedback traffic. Moreover, the patch also significantly reduces the ack traffic as we now only generate an ack per frame, unless duplicate acks need to be sent. Because of the reduced feedback traffic, a sender's rx path and a receiver's tx path are now significantly less loaded. In particular, a sender can overwhelm a 40Gbps NIC and generate tx drop bursts for low rtts. Consequently, tx pacing is now enforced by default. Change-Id: I619c29a8945bf26c093f8f9e197e3c6d5d43868e Signed-off-by: Florin Coras <fcoras@cisco.com>