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2019-08-22dns: make the dns name resolver a pluginDave Barach1-221/+0
Type: refactor Signed-off-by: Dave Barach <dave@barachs.net> Change-Id: I823c2cd307a4613653a2d20f564dda062d4da31b
2019-08-19dns: handle multiple replies for single requestsDave Barach1-1/+3
The world is a mess. A single DNS request may yield multiple, subtly different responses; all with the same DNS protocol-level ID. Last response wins in terms of what ends up in the cache. First response wins in terms of the response sent to the client. Hard to do otherwise since we have no clue that more than one answer will be forthcoming. Type: fix Signed-off-by: Dave Barach <dave@barachs.net> Change-Id: I3175a40eb1fea237048d16b852a430f5ab51eaef
2019-08-15dhcp: resolver process node index in main_tDave Barach1-1/+0
Remove the (unused) node_registration_t, don't try to use it to signal resolution events. Type: fix Ticket: VPP-1746 Signed-off-by: Dave Barach <dave@barachs.net> Change-Id: Ice975e32152892ac4100b9e758412d48a43f09f1
2019-07-31vppinfra: refactor test_and_set spinlocks to use clib_spinlock_tjaszha031-4/+3
Spinlock performance improved when implemented with compare_and_exchange instead of test_and_set. All instances of test_and_set locks were refactored to use clib_spinlock_t when possible. Some locks e.g. ssvm synchronize between processes rather than threads, so they cannot directly use clib_spinlock_t. Type: refactor Change-Id: Ia16b5d4cd49209b2b57b8df6c94615c28b11bb60 Signed-off-by: Jason Zhang <jason.zhang2@arm.com> Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com> Reviewed-by: Lijian Zhang <Lijian.Zhang@arm.com>
2019-07-30vppinfra: refactor use of CLIB_MEMORY_BARRIER ()jaszha031-2/+1
All instances of test_and_set locks used the following sequence to release the locks: CLIB_MEMORY_BARRIER (); p->lock = 0; // p is a generic struct with a TAS lock Use clib_atomic_release to generate more efficient assembly code. Type: refactor Change-Id: Idca3a38b1cf43578108bdd1afe83b6ebc17a4c68 Signed-off-by: Jason Zhang <jason.zhang2@arm.com> Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com> Reviewed-by: Lijian Zhang <Lijian.Zhang@arm.com>
2019-07-30vppinfra: conformed spinlocks to use CLIB_PAUSEjaszha031-1/+2
Modified test-and-set spin locks to call CLIB_PAUSE () when spinning for code consistency. Decreases the memory bandwidth consumed. Type: fix Change-Id: I1cca4f87f44f23f257c7a35466cd2e7767072f51 Signed-off-by: Jason Zhang <jason.zhang2@arm.com> Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com> Reviewed-by: Lijian Zhang <Lijian.Zhang@arm.com>
2019-05-30Start the dns resolver process on demandDave Barach1-0/+5
Change-Id: Iab27b405fb3ca7aed94ae974d57c286c41298c3a Signed-off-by: Dave Barach <dave@barachs.net>
2018-10-23dns, dhcp: on-demand udp port registrationDave Barach1-0/+3
Change-Id: I8bf411adc6c5f4caa349d161174b544d2de3ad1d Signed-off-by: Dave Barach <dave@barachs.net>
2018-10-19vppinfra: add atomic macros for __sync builtinsSirshak Das1-1/+1
This is first part of addition of atomic macros with only macros for __sync builtins. - Based on earlier patch by Damjan (https://gerrit.fd.io/r/#/c/10729/) Additionally - clib_atomic_release macro added and used in the absence of any memory barrier. - clib_atomic_bool_cmp_and_swap added Change-Id: Ie4e48c1e184a652018d1d0d87c4be80ddd180a3b Original-patch-by: Damjan Marion <damarion@cisco.com> Signed-off-by: Sirshak Das <sirshak.das@arm.com> Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com> Reviewed-by: Ola Liljedahl <ola.liljedahl@arm.com> Reviewed-by: Steve Capper <steve.capper@arm.com>
2018-01-10Functional improvements, bug fixesDave Barach1-0/+8
At least when testing against "known good" DNS servers: it turns out that sending 2x requests - one for an A-record and another for a AAAA-record - seems to work better than sending a single DNS_TYPE_ALL request. Fix c-string vs. u8 vector mistakes. Fix server failover. Change-Id: I26554f0a9c1744376f21372506ebec8658e351e2 Signed-off-by: Dave Barach <dave@barachs.net>
2017-11-15Punt DNS request/reply traffic when name resolution disabledDave Barach1-0/+1
Change-Id: Iaad22f25993783be57247aa1f050740f96d2566a Signed-off-by: Dave Barach <dave@barachs.net>
2017-11-05ip4 network request processingDave Barach1-7/+48
Change-Id: I6eb0681cc2595f81ac3bf5ffa3e9b2adfff04a36 Signed-off-by: Dave Barach <dave@barachs.net>
2017-10-20Add reverse DNS (ip to name) resolutionDave Barach1-2/+11
Change-Id: Ic531d820b1846ff7363e5c396ac0b1176e87b401 Signed-off-by: Dave Barach <dave@barachs.net>
2017-10-16DNS name resolver improvementsDave Barach1-2/+7
- Cache intermediate CNAME records - Bug fixes Change-Id: I06dcb558212fc5e9434281493c872577cf9b83e1 Signed-off-by: Dave Barach <dave@barachs.net>
2017-10-13VPP-1027: DNS name resolverDave Barach1-0/+149
This patch is a plausible first-cut, suitable for initial testing by vcl (host stack client library). Main features; - recursive name resolution - multiple ip4/ip6 name servers - cache size limit enforcement - currently limited to 65K - ttl / aging - static mapping support - show / clear / debug CLI commands Binary APIs provided for the following: - add/delete name servers - enable/disable the name cache - resolve a name To Do list: - Respond to ip4/ip6 client DNS requests (vs. binary API requests) - Perf / scale tuning - map pending transaction ids to pool indices, so the cache can (greatly) exceed 65K entries - Security improvements - Use unpredictable dns transaction IDs, related to previous item - Make sure that response-packet src ip addresses match the server - Add binary APIs - deliver raw response data to clients - control recursive name resolution - Documentation Change-Id: I48c373d5c05d7108ccd814d4055caf8c75ca10b7 Signed-off-by: Dave Barach <dave@barachs.net>