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[dnssd-server] implement DNS-SD discovery proxy functionality in core (#10050)

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This commit implements a generic discovery proxy in the DNS-SD server.
It uses a set of newly added `otPlatDnssd` platform DNS-SD(mDNS) APIs
to start or stop browsers, SRV/TXT resolvers, and IPv6/IPv4 address
resolvers. These APIs closely match the native OpenThread mDNS
implementation.

OpenThread DNS-SD's existing `QueryCallback` mechanism, enabling
customized discovery proxy implementations, remains supported.

This commit includes a comprehensive unit test. This test validates
the discovery proxy's behavior, covering: standard use cases, request
timeout, s hared resolver/browser usage for multiple queries with the
same name, filtering of invalid addresses, and various edge cases.
This commit is contained in:
Abtin Keshavarzian
2024-06-10 12:16:24 -07:00
committed by GitHub
parent a8f07b57cf
commit 5dbbab175b
17 changed files with 4617 additions and 139 deletions
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etc/cmake/options.cmake
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@@ -201,6 +201,7 @@ ot_option(OT_DNS_CLIENT OPENTHREAD_CONFIG_DNS_CLIENT_ENABLE "DNS client")
ot_option(OT_DNS_CLIENT_OVER_TCP OPENTHREAD_CONFIG_DNS_CLIENT_OVER_TCP_ENABLE "Enable dns query over tcp")
ot_option(OT_DNS_DSO OPENTHREAD_CONFIG_DNS_DSO_ENABLE "DNS Stateful Operations (DSO)")
ot_option(OT_DNS_UPSTREAM_QUERY OPENTHREAD_CONFIG_DNS_UPSTREAM_QUERY_ENABLE "Allow sending DNS queries to upstream")
ot_option(OT_DNSSD_DISCOVERY_PROXY OPENTHREAD_CONFIG_DNSSD_DISCOVERY_PROXY_ENABLE "DNS-SD discovery proxy")
ot_option(OT_DNSSD_SERVER OPENTHREAD_CONFIG_DNSSD_SERVER_ENABLE "DNS-SD server")
ot_option(OT_DUA OPENTHREAD_CONFIG_DUA_ENABLE "Domain Unicast Address (DUA)")
ot_option(OT_ECDSA OPENTHREAD_CONFIG_ECDSA_ENABLE "ECDSA")