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path: root/src/vnet/session/session_node.c
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2018-06-01session: improve disconnect handlingFlorin Coras1-4/+11
If the caller is the session owning thread or the main thread with a worker barrier sync (cli/api) add an event to the pending disconnects vector in the session node and entirely avoid using the event queue. Useful for bursts of disconnects (like an app detach). If disconnects come from a processes, be willing to retry enqueueing the disconnect to the event queue multiple times. Change-Id: Ieece1f1091b713f94c41c703b6e805bc8498816a Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-05-26tcp: loss recovery improvements/fixesFlorin Coras1-3/+6
- fix newreno cwnd computation - reset snd_una_max on entering recovery - accept acks beyond snd_nxt but less than snd_congestion when in recovery - avoid entering fast recovery multiple times when using sacks - avoid as much as possible sending small segments when doing fast retransmit - more event logging Change-Id: I19dd151d7704e39d4eae06de3a26f5e124875366 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-05-18session: add session process nodeFlorin Coras1-0/+45
Add a session process node that handles main thread tx and retransmit in order to avoid having a polling input node. Change-Id: I3357e987c023a84b533b32793e37ab4204420f64 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-05-13session: alloc one frame per output node dispatchFlorin Coras1-47/+61
Change-Id: I1f7877af61f3726cfb7b93ce7893f6df23e866a6 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-05-09session: cleanup session tx functionFlorin Coras1-289/+342
- rework the function to declutter and avoid building more than one tx frame - add dual loop although benefits in my tests seem to be minimal - improve tcp/udp echo external apps. They have slightly better throughput than internal echo apps. - udp bugfixes Change-Id: Iea4a245b1b1bb407a7f403dedcce2664a49f774b Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-04-18udp/session: refactor to support dgram modeFlorin Coras1-31/+103
- adds session layer support for datagram based protocols - updates udp to work in pure connectionless and datagram mode. The existing connected mode is now 'accessible' for apps as a dummy UDPC, as in, connected udp, protocol. - updates udp_echo, echo client, echo server code to work in datagram mode. Change-Id: I2960c0d2d246cb166005f545794ec31fe0d546dd Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-03-23tcp/session: sprinkle prefetchesFlorin Coras1-16/+20
Change-Id: Idef3c665580c13d72e99f43d16b8b13cc6ab746f Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-03-02session: first approximation implementation of tlsFlorin Coras1-2/+16
It consists of two main parts. First, add an application transport type whereby applications can offer transport to other applications. For instance, a tls app can offer transport services to other applications. And second, a tls transport app that leverages the mbedtls library for tls protocol implementation. Change-Id: I616996c6e6539a9e2368fab8a1ac874d7c5d9838 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-01-27session: disconnect and echo client improvementsFlorin Coras1-1/+1
Change-Id: If421bad17b6cfe8e321257c93bb38931e37d7b64 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-01-09api: refactor vlibmemoryFlorin Coras1-5/+5
- separate client/server code for both memory and socket apis - separate memory api code from generic vlib api code - move unix_shared_memory_fifo to svm and rename to svm_fifo_t - overall declutter Change-Id: I90cdd98ff74d0787d58825b914b0f1eafcfa4dc2 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-12-11session: generalize handling of network transportsFlorin Coras1-22/+7
- compute session type out of transport and network protos - make session, session lookup and session queue code network protocol agnostic This does not update the session layer to support non-ip network layer protocols Change-Id: Ifc2f92845e158b649d59462eb7d51c12af536691 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-29session: fix preallocation of local endpoint tableFlorin Coras1-1/+4
Change-Id: I67a73e31bda9e497859297fcc1765e880572884a Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-28Shut down session queue input nodes on exitDave Barach1-0/+19
Shut off (especially) worker-thread session queue input nodes. Otherwise, vpp can crash when the main thread unmaps the API segment. Change-Id: Idf855e7570e0066cc921ae34bc53afabaa9e1dba Signed-off-by: Dave Barach <dave@barachs.net>
2017-11-28tcp: fix retransmissions under buffer shortageFlorin Coras1-2/+1
- add debugging scaffolding for simulating buffer shortage Change-Id: Ice519d74f9c4e4094c4586c548185135b7bb5f2d Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-21session: unset fifo event before reading fifo sizeFlorin Coras1-6/+4
Change-Id: Ic32a76e5f7c48fd52f2e93ee18ba23fb6ad1b855 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-10-16session: fix build when debugging is onFlorin Coras1-1/+1
Change-Id: I193832a0cd0557fffc034a1223f67fa64a4d45ae Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-10-16udp: refactor udp codeFlorin Coras1-5/+15
Change-Id: I44d5c9df7c49b8d4d5677c6d319033b2da3e6b80 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-10-10session: add support for application namespacingFlorin Coras1-3/+3
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>
2017-09-19session/tcp: improve preallocated segment handlingFlorin Coras1-8/+13
- add preallocated segment flag - don't remove pre-allocated segments except if application detaches - when preallocating fifos in multiple segments, completely fill a segment before moving to the next - detach server application from segment-managers when deleting app - batch syn/syn-ack/fin (re)transmissions - loosen up close-wait and time-wait times Change-Id: I412f53ce601cc83b3acc26aeffd7fa2d52d73b03 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-09-12tcp: horizontal scaling improvmentsFlorin Coras1-2/+4
- do not scale syn-ack window - fix the max number of outstanding syns in builtin client - fix syn-sent ack validation to use modulo arithmetic - improve retransmit timer handler - fix output buffer allocator leakeage - improved debugging Change-Id: Iac3bc0eadf7d0b494a93e22d210a3153b61b3273 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-08-29session: segment manager improvementsFlorin Coras1-1/+2
- cleanup connects segment manager even if first - fix segment manager allocation for listen sessions - improve handling of process private segments (mheaps/main heap) - added segment manager cli Change-Id: Ic2ca97c3622ab2286d5fb5772aeb57680e64f769 Signed-off-by: Florin Coras <fcoras@cisco.com> Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
2017-08-25tcp: retransmit and multi-buffer segment fixes and improvementsFlorin Coras1-13/+13
- set session state as closed on session manager delete - enable retransmit as opposed to persist timer after persist timer completes - properly discard buffer chain bytes when new data overlaps ooo segments - don't use rxt bytes in snd space estimate used on tx path Change-Id: Id9cab686e532e5fe70c775d5440260e8eb890a9f Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-08-18session: fix multi-buffer segmentsFlorin Coras1-19/+22
Change-Id: I0e22c85ea570b934b9c78dc5e86d86d690bdae5e Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-08-11Fix tcp multi buffer segments retransmissionFlorin Coras1-14/+25
- Fix tcp/udp sw checksum computation - Fix allocation of multi buffer tcp segments for retransmits - Send FIN only if/when tx fifo is empty Change-Id: I2e43a14b87a72c9e547b4339b9a51811cf5732c4 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-07-25Cleanup/refactor session layer codeFlorin Coras1-0/+685
Change-Id: Ica99e8cb919fca6b069c37c969d60e8ccc2c6bf9 Signed-off-by: Florin Coras <fcoras@cisco.com>