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2017-10-16udp: refactor udp codeFlorin Coras1-7/+7
Change-Id: I44d5c9df7c49b8d4d5677c6d319033b2da3e6b80 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-10-10session: add support for application namespacingFlorin Coras1-25/+24
Applications are now provided the option to select the namespace they are to be attached to and the scope of their attachement. Application namespaces are meant to: 1) constrain the scope of communication through the network by association with source interfaces and/or fib tables that provide the source ips to be used and limit the scope of routing 2) provide a namespace local scope to session layer communication, as opposed to the global scope provided by 1). That is, sessions can be established without assistance from transport and network layers. Albeit, zero/local-host ip addresses must still be provided in session establishment messages due to existing application idiosyncrasies. This mode of communication uses shared-memory fifos (cut-through sessions) exclusively. If applications request no namespace, they are assigned to the default one, which at its turn uses the default fib. Applications can request access to both local and global scopes for a namespace. If no scope is specified, session layer defaults to the global one. When a sw_if_index is provided for a namespace, zero-ip (INADDR_ANY) binds are converted to binds to the requested interface. Change-Id: Ia0f660bbf7eec7f89673f75b4821fc7c3d58e3d1 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-07-30Make tcp active open data structures thread safeFlorin Coras1-7/+7
- Cleanup half-open connections and timers on the right thread - Ensure half-open connection and transport endpoint pools are thread safe - Enqueue TX events to the correct vpp thread in the builtin client - Use transport proto in transport connections instead of session type Change-Id: Id13239a206afbff6f34a38afa510fe014e4b2049 Signed-off-by: Florin Coras <fcoras@cisco.com> Signed-off-by: Dave Barach <dave@barachs.net>
2017-07-21Improvements to tcp rx path and debuggingFlorin Coras1-0/+99
- Increment rcv_nxt for fin packets - Call tcp_segment_rcv only if buffer has data - Parse rcv opts before deleting half-open connection - Fix initial rcv_wnd - Improved event logging Change-Id: I9b83c04f432c4cec832c480b03e534deff02c3b1 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-07-15Fixes and improved tcp/session debuggingFlorin Coras1-0/+289
- Fix rx sack option parsing - Add session sack scoreboard tracing and replaying - Add svm fifo tracing and replaying - Scoreboard/svm fifo ooo segment reception fixes - Improved overall debugging Change-Id: Ieae07eba355e66f5935253232bb00f2dfb7ece00 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-07-11Horizontal (nSessions) scaling draftDave Barach1-3/+7
- Data structure preallocation. - Input state machine fixes for mid-stream 3-way handshake retries. - Batch connections in the builtin_client - Multiple private fifo segment support - Fix elog simultaneous event type registration - Fix sacks when segment hole is added after highest sacked - Add "accepting" session state for sessions pending accept - Add ssvm non-recursive locking - Estimate RTT for syn-ack - Don't init fifo pointers. We're using relative offsets for ooo segments - CLI to dump individual session Change-Id: Ie0598563fd246537bafba4feed7985478ea1d415 Signed-off-by: Dave Barach <dbarach@cisco.com> Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-06-19Overall tcp performance improvements (VPP-846)Florin Coras1-11/+59
- limit minimum rto per connection - cleanup sack scoreboard - switched svm fifo out-of-order data handling from absolute offsets to relative offsets. - improve cwnd handling when using sacks - add cc event debug stats - improved uri tcp test client/server: bugfixes and added half-duplex mode - expanded builtin client/server - updated uri socket client/server code to work in half-duplex - ensure session node unsets fifo event for empty fifo - fix session detach Change-Id: Ia446972340e32a65e0694ee2844355167d0c170d Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-06-09Implement sack based tcp loss recovery (RFC 6675)Florin Coras1-21/+32
- 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>
2017-05-18Improve sack bytes accounting and testingFlorin Coras1-5/+70
Change-Id: Iabeda0d0615b0f6fe20dd00611cb4c594d90b7eb Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-05-01TCP ooo reception fixesFlorin Coras1-7/+107
- Improve svm fifo handling of out-of-order segments - Ensure tsval_recent is updated only if rcv_las falls withing the segments's sequence space - Avoid directly dropping old ACKs - Improve debugging Change-Id: I88dbe2394a0ad7eb389a4cc12d013a13733953aa Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-04-25Session/tcp coverity fixesFlorin Coras1-5/+4
Change-Id: Ic5467df16e870b49c49678b1dbb40f4a2390b3c9 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-04-25Add sack tx unit testFlorin Coras1-2/+141
Change-Id: Ib91db6e531231bdc52b0104673a912bee024872f Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-04-24Debug CLI to magically create / delete a TCP sessionDave Barach1-3/+66
The session ends up in established state, and is hand-crafted to look like it was created by the builtin_server. This will come in handy for injecting packets into tcp46-established, along with ancillary debug CLI to adjust connection parameters. Immediate applications include screwball window cases, out of order segments, paws checking, and so on and so forth. Debug CLI script: loop create set int ip address loop0 6.0.1.1/8 set int state loop0 up set ip arp loop0 6.0.1.2 feed.face.babe test tcp server test tcp session packet-generator new { name tcp limit 1 node ip4-input size 100-100 interface loop0 no-recycle data { TCP: 6.0.1.2 -> 6.0.1.1 TCP: 11234 -> 1234 ACK window 2000 seqnum 0 acknum 0 incrementing 100 } } Change-Id: I866c2159376064b7d14f70531022c1fe949258c2 Signed-off-by: Dave Barach <dave@barachs.net>
2017-04-24Session layer improvementsFlorin Coras1-23/+20
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>
2017-04-19Add more svm fifo unit testsFlorin Coras1-59/+246
Change-Id: Ifc07b3f90ac155c26c3a216e073b474b499ebd44 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-04-18Fix fifo ooo bugs and improve testingDave Barach1-45/+471
Change-Id: If3c01e318bcb740ca5b240c63f712e2167082a80 Signed-off-by: Dave Barach <dave@barachs.net> Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-04-13Session layer refactoringFlorin Coras1-3/+124
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>
2017-03-27TCP/session improvementsFlorin Coras1-0/+216
- 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>