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path: root/src/resolve/resolved-dns-answer.c
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2015-11-25resolved: fully support DNS search domainsLennart Poettering
This adds support for searching single-label hostnames in a set of configured search domains. A new object DnsQueryCandidate is added that links queries to scopes. It keeps track of the search domain last used for a query on a specific link. Whenever a host name was unsuccessfuly resolved on a scope all its transactions are flushed out and replaced by a new set, with the next search domain appended. This also adds a new flag SD_RESOLVED_NO_SEARCH to disable search domain behaviour. The "systemd-resolve-host" tool is updated to make this configurable via --search=. Fixes #1697
2015-10-27util-lib: split out allocation calls into alloc-util.[ch]Lennart Poettering
2015-10-24util-lib: split our string related calls from util.[ch] into its own file ↵Lennart Poettering
string-util.[ch] There are more than enough calls doing string manipulations to deserve its own files, hence do something about it. This patch also sorts the #include blocks of all files that needed to be updated, according to the sorting suggestions from CODING_STYLE. Since pretty much every file needs our string manipulation functions this effectively means that most files have sorted #include blocks now. Also touches a few unrelated include files.
2015-09-16resolved: cache - cache what we can of negative redirect chainsTom Gundersen
When a NXDATA or a NODATA response is received for an alias it may include CNAME records from the redirect chain. We should cache the response for each of these names to avoid needless roundtrips in the future. It is not sufficient to do the negative caching only for the canonical name, as the included redirection chain is not guaranteed to be complete. In fact, only the final CNAME record from the chain is guaranteed to be included. We take care not to cache entries that redirects outside the current zone, as the SOA will then not be valid.
2015-08-21resolved: rework synthesizing logicLennart Poettering
With this change we'll now also generate synthesized RRs for the local LLMNR hostname (first label of system hostname), the local mDNS hostname (first label of system hostname suffixed with .local), the "gateway" hostname and all the reverse PTRs. This hence takes over part of what nss-myhostname already implemented. Local hostnames resolve to the set of local IP addresses. Since the addresses are possibly on different interfaces it is necessary to change the internal DnsAnswer object to track per-RR interface indexes, and to change the bus API to always return the interface per-address rather than per-reply. This change also patches the existing clients for resolved accordingly (nss-resolve + systemd-resolve-host). This also changes the routing logic for queries slightly: we now ensure that the local hostname is never resolved via LLMNR, thus making it trustable on the local system.
2015-06-10resolve: move dns routines into sharedNick Owens
2015-05-18resolved: allow DnsAnswer objects with no space for RRsLennart Poettering
They might be created as result of merged answer sets, hence accept them. http://lists.freedesktop.org/archives/systemd-devel/2015-April/030834.html
2014-07-30resolved: properly set TTL in SOA recordsLennart Poettering
2014-07-30resolved: include SOA records in LLMNR replies for non-existing RRs to allow ↵Lennart Poettering
negative caching
2014-07-30resolved: never attempt negative caching of SOA recordsLennart Poettering
2014-07-30resolved: when answer A or AAAA questions, order responses by whether ↵Lennart Poettering
addresses are link-local or not
2014-07-23resolved: most DNS servers can't handle more than one question per packet, ↵Lennart Poettering
hence let's not generate that
2014-07-23resolved: implement negative cachingLennart Poettering
2014-07-23resolved: rework logic so that we can share transactions between queries of ↵Lennart Poettering
different clients