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path: root/src/vnet/dns/resolver_process.c
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2019-08-19dns: handle multiple replies for single requestsDave Barach1-8/+44
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 Barach1-2/+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
2019-05-30Start the dns resolver process on demandDave Barach1-8/+11
Change-Id: Iab27b405fb3ca7aed94ae974d57c286c41298c3a Signed-off-by: Dave Barach <dave@barachs.net>
2018-01-10Functional improvements, bug fixesDave Barach1-1/+58
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>
2018-01-09api: refactor vlibmemoryFlorin Coras1-2/+2
- 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>
2017-11-05ip4 network request processingDave Barach1-38/+56
Change-Id: I6eb0681cc2595f81ac3bf5ffa3e9b2adfff04a36 Signed-off-by: Dave Barach <dave@barachs.net>
2017-10-20Add reverse DNS (ip to name) resolutionDave Barach1-14/+36
Change-Id: Ic531d820b1846ff7363e5c396ac0b1176e87b401 Signed-off-by: Dave Barach <dave@barachs.net>
2017-10-16DNS name resolver improvementsDave Barach1-2/+3
- 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/+243
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>