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authorLennart Poettering <lennart@poettering.net>2015-11-23 21:25:40 +0100
committerLennart Poettering <lennart@poettering.net>2015-11-23 21:31:29 +0100
commit45ec7efb6c2560c80dfa752bc9d3733749dc52cb (patch)
tree06a8eb4a76bc956f2b210f5c208ae51c7a9efa59 /src/resolve/resolved-dns-answer.c
parenta564ca2fd113b2876e677beab60b38d50591e246 (diff)
resolved: add ResolveService() bus call for resolving SRV and DNS-SD services
This also adds client-side support for this to systemd-resolve-host. Note that the ResolveService() API can deal both with DNS-SD service (consisting of service name, type and domain), as well as classic SRV services (consisting just of a type and a domain), all exposed in the same call. This patch also reworks CNAME handling in order to reuse it between hostname, RR and service lookups. In contrast to Avahi and Bonjour, this new API will actually reolve the A/AAAA RRs the SRV RRs point to in one go (unless this is explicitly disabled). This normally comes for free, as these RRs are sent along the SRV responses anyway, hence let's make use of that. This makes the API considerably easier to use, as a single ResolveService() invocation will return all necessary data to pick a server and connect() to it. Note that this only implements the DNS-SD resolving step, it does not implement DNS-SD browsing, as that makes sense primarily on mDNS, due to its continuous nature.
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