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2017-06-09Implement sack based tcp loss recovery (RFC 6675)Florin Coras1-23/+34
- refactor existing congestion control code (RFC 6582/5681). Handling of ack feedback now consists of: ack parsing, cc event detection, event handling, congestion control update - extend sack scoreboard to support sack based retransmissions - basic implementation of Eifel detection algorithm (RFC 3522) for detecting spurious retransmissions - actually initialize the per-thread frame freelist hash tables - increase worker stack size to 2mb - fix session queue node out-of-buffer handling - ensure that the local buffer cache vec_len matches reality - avoid 2x spurious event requeues when short of buffers - count out-of-buffer events - make the builtin server thread-safe - fix bihash template threading issue: need to paint -1 across uninitialized working_copy_length vector elements (via rebase from master) Change-Id: I646cb9f1add9a67d08f4a87badbcb117980ebfc4 Signed-off-by: Florin Coras <fcoras@cisco.com> Signed-off-by: Dave Barach <dbarach@cisco.com>
2017-05-20Improve session debuggingFlorin Coras1-14/+78
Also improves builtin client code. Change-Id: I8bca1aa632028f95c373726efb0abf2ee0eff414 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-05-18Improve sack bytes accounting and testingFlorin Coras1-0/+42
Change-Id: Iabeda0d0615b0f6fe20dd00611cb4c594d90b7eb Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-05-11Handle RST of TCP connections in SYN-RCVD state, VPP-822Florin Coras1-8/+23
Change-Id: Ieb0c1e690d6ae082cfedb276252a31fab480e561 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-05-10Improve TCP option handling, VPP-757Florin Coras1-1/+5
Change-Id: Ica634536387d1196366ec96c52770287fcab0768 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-05-07Include TCP options in segment size computationFlorin Coras1-2/+15
Ensure that TCP data plus options does not exceed peer's advertised MSS. Change-Id: I0de824cb3619346f0394dd694942fc1cf33a82b7 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-05-07Fix TCP loss recovery, VPP-745Florin Coras1-8/+27
Allows pure loss recovery retransmits only on timeout. Change-Id: I563cdbf9e7b890a6569350bdbda4f746ace0544e Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-05-02Fix TCP tx when snd_wnd < smssFlorin Coras1-3/+4
Fixes VPP-728, VPP-729, VPP-730 Change-Id: Ie8c6c0dd006f98527525e87d19b508bb8d39db69 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-04-24Session layer improvementsFlorin Coras1-5/+8
Among others: - Moved app event queue to shared memory segment - Use private memory segment for builtin apps - Remove pid from svm fifo - Protect session fifo (de)allocation - Use fifo event for session disconnects - Have session queue node poll in all wk threads Change-Id: I89dbf7fdfebef12f5ef2b34ba3ef3c2c07f49ff2 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-04-18Fix fifo ooo bugs and improve testingDave Barach1-1/+1
Change-Id: If3c01e318bcb740ca5b240c63f712e2167082a80 Signed-off-by: Dave Barach <dave@barachs.net> Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-04-13Session layer refactoringFlorin Coras1-6/+14
Major refactoring of the session layer api - Add attatch api for application binding to the the session layer - Simplify listen/connect calls - Update application CLI - Add transport endpoint to accept callback - Associate segment manager to application and allow for multiple binds/connects per app Additional: - svm fifo cleanup - add fifo free, format fns - add fifo offset enqueue unit test Change-Id: Id93a65047de61afc2bf3d58c9b544339c02065af Signed-off-by: Florin Coras <fcoras@cisco.com> Signed-off-by: Dave Barach <dave@barachs.net>
2017-04-06Use thread local storage for thread indexDamjan Marion1-4/+4
This patch deprecates stack-based thread identification, Also removes requirement that thread stacks are adjacent. Finally, possibly annoying for some folks, it renames all occurences of cpu_index and cpu_number with thread index. Using word "cpu" is misleading here as thread can be migrated ti different CPU, and also it is not related to linux cpu index. Change-Id: I68cdaf661e701d2336fc953dcb9978d10a70f7c1 Signed-off-by: Damjan Marion <damarion@cisco.com>
2017-04-02TCP cc/window management fixes and debuggingFlorin Coras1-2/+4
- added persist timer - update rcv_las whenever sending an ack - moved fifo size to its own cache line - improved session and builtin client debugging Change-Id: Ia649cf942cf0c061a713e8b67f0eb6974a6cd55b Signed-off-by: Florin Coras <fcoras@cisco.com> Signed-off-by: Dave Barach <dave@barachs.net>
2017-03-27TCP/session improvementsFlorin Coras1-3/+34
- Added svm fifo flag for tracking fifo dequeue events (replaces event length). Updated all code to switch to the new scheme. - More session debugging - Fix peek index wrap - Add a trivial socket test client - Fast retransmit/cc fixes - tx and rx SACK fixes and unit testing - SRTT computation fix - remove dupack/ack burst filters - improve ack rx - improved segment rx - builtin client test code Change-Id: Ic4eb2d5ca446eb2260ccd3ccbcdaa73c64e7f4e1 Signed-off-by: Florin Coras <fcoras@cisco.com> Signed-off-by: Dave Barach <dbarach@cisco.com>
2017-03-13VPP-659 Improve tcp/session debugging and testingFlorin Coras1-69/+112
- event-logging support for tcp and session layer - improvements to uri test code - builtin_server on port 1234 - use the CLOSEWAIT timer when we rx FIN in FIN_WAIT_2 state Change-Id: Ibc445f164b2086b20323bf89c77cffd3059f570f Signed-off-by: Florin Coras <fcoras@cisco.com> Signed-off-by: Dave Barach <dbarach@cisco.com> Signed-off-by: Dave Barach <dave@barachs.net>
2017-03-10VPP-659 TCP improvementsFlorin Coras1-12/+51
- builtin test echo server - fix SYN-ACK retransmit canceling - avoid sending spurious ACK if in LAST_ACK - improved client dummy test app - renamed tx fifo dequeuing and sending functions to avoid confusion - improved RST handling Change-Id: Ia14aad3df319540dcf6e6a4e18a9f8d423a4b83b Signed-off-by: Florin Coras <fcoras@cisco.com> Signed-off-by: Dave Barach <dave@barachs.net>
2017-03-07Register TCP with IP only if session is enabledFlorin Coras1-6/+33
Change-Id: I73154179e78aeae5f879125237bce593d0978fae Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-03-04Cleanup URI code and TCP bugfixingFlorin Coras1-24/+24
- Add CLI/API to enable session layer, by default it's disabled - Improve rcv wnd computation - Improvements to tx path - URI code cleanup - Builtin test tcp server - Improve src port allocation Change-Id: I2ace498e76a0771d4c31a8075cc14fe33d7dfa38 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-03-01VPP-598: tcp stack initial commitDave Barach1-0/+708
Change-Id: I49e5ce0aae6e4ff634024387ceaf7dbc432a0351 Signed-off-by: Dave Barach <dave@barachs.net> Signed-off-by: Florin Coras <fcoras@cisco.com>