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2018-04-16session: use generic session pool for listenersFlorin Coras1-3/+2
Change-Id: I825f3822910a6ee368b9004e39ca16ac6833e30c Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-03-23session: allow builtin apps to register namesFlorin Coras1-0/+8
Change-Id: I4b428e170436671b329657283cf7653befc85c9f Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-03-07tls: enforce certificate verificationFlorin Coras1-3/+3
- add option to use test certificate in the ca chain - add hostname to extended session endpoint fields and connect api parameters. If hostname is present, certificate validation is enforced. - use /etc/ssl/certs/ca-certificates.crt to bootstrap CA cert. A different path can be provided via startup config Change-Id: I046f9c6ff3ae6a9c2d71220cb62eca8f7b10e5fb Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-03-02session: first approximation implementation of tlsFlorin Coras1-7/+3
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>
2018-02-14session: support local sessions and deprecate redirectsFlorin Coras1-53/+63
Memfd backed shared memory segments can only be negotiated over sockets. For such scenarios, the existing redirect mechanism that establishes cut-through sessions does not work anymore as the two peer application do not share such a socket. This patch adds support for local sessions, as opposed to sessions backed by a transport connection, in a way that is almost transparent to the two applications by reusing the existing binary api messages. Moreover, all segment allocations are now entirely done through the segment manager valloc, so segment overlaps due to independent allocations previously required for redirects are completely avoided. The one notable characteristic of local sessions (cut-through from app perspective) notification messages is that they carry pointers to two event queues, one for each app peer, instead of one. For transport-backed sessions one of the queues can be inferred but for local session they cannot. Change-Id: Ia443fb63e2d9d8e43490275062a708f039038175 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-02-05session: segment manager refactorFlorin Coras1-26/+44
- use valloc as a 'central' segment baseva manager - use per segment manager segment pools and use rwlocks to guard them - add session test that exercises segment creation - embed segment manager properties into application since they're shared - fix rw locks Change-Id: I761164c147275d9e8a926f1eda395e090d231f9a Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-01-25session: add support for memfd segmentsFlorin Coras1-8/+2
- update segment manager and session api to work with both flavors of ssvm segments - added generic ssvm slave/master init and del functions - cleanup/refactor tcp_echo - fixed uses of svm fifo pool as vector Change-Id: Ieee8b163faa407da6e77e657a2322de213a9d2a0 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-12-14session: cleanup attach flagsFlorin Coras1-4/+4
Change-Id: I39d21d15677f57e10b69b8842f2cbca277abddf0 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-12-06session: support for rule tags overwritingFlorin Coras1-3/+20
Change-Id: I0cf48b69042996afcb8b192f5fd98165058d9e1d Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-22session: more rules unit tests and cli improvementsFlorin Coras1-5/+131
Change-Id: I7e5545297ab9f2db8d7d07e44c744bdb0a0874a7 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-20session/tcp: filtering improvementsFlorin Coras1-29/+111
- make allow action explicit (-3) - add session lookup is_filtered return flag that is set if lookup hit a deny filter - change tcp logic to drop filtered packets when punting is enabled Change-Id: Ic38f294424663a4e108439b7571511f46f8e0be1 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-10session: use listener logic for proxy rulesFlorin Coras1-10/+20
This moves session proxy logic from session rules tables to table/logic used to manage session listeners in order to avoid overlap of semantically different rules. Change-Id: I463522cce91b92d942f6a2086fb14c3366b9f023 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-09session: lookup/rules table improvements and cleanupFlorin Coras1-43/+100
Change-Id: I5217364220023df34d5bee071cb750df1661b093 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-07session: fix v6 double bindsFlorin Coras1-4/+88
Change-Id: Ie747b490901254e962cf61814491851b891129ee Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-06session: add rule tagsFlorin Coras1-22/+39
Change-Id: Id5ebb410f509ac4c83d60e48efd54e00035e5ce6 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-03session: support drop action in rules tableFlorin Coras1-2/+68
Change-Id: Ided2980373ed5329c68f958f61be893428bccd31 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-01session: add support for proxying appsFlorin Coras1-2/+129
To enable this, applications set the proxy flag in their attach requests and pass the transport protocols they want to act as proxies for as part of the attach options. When proxy is enabled, session rules that point incoming packets to the proxy app are addedd to the local and global session tables, if these scopes are accessible to the app. In particular, in case of the former, the rule accepts packets from all sources and all ports destined to the namespace's supporting interface address on any port. While in case of the latter, a generic any destination and any port rule is addedd. Change-Id: I791f8c1cc083350f02e26a2ac3bdbbfbfa19ece3 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-10-28session: rules tablesFlorin Coras1-0/+462
This introduces 5-tuple lookup tables that may be used to implement custom session layer actions at connection establishment time (session layer perspective). The rules table build mask-match-action lookup trees that for a given 5-tuple key return the action for the first longest match. If rules overlap, ordering is established by tuple longest match with the following descending priority: remote ip, local ip, remote port, local port. At this time, the only match action supported is to forward packets to the application identified by the action. Change-Id: Icbade6fac720fa3979820d50cd7d6137f8b635c3 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-10-27session: instantiate appns lookup table only onceFlorin Coras1-0/+1
Change-Id: I39d634b7691a524e5221c28997a737102298c281 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-10-16udp: refactor udp codeFlorin Coras1-10/+15
Change-Id: I44d5c9df7c49b8d4d5677c6d319033b2da3e6b80 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-10-10session: add support for application namespacingFlorin Coras1-0/+473
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>