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2015-12-28Merge pull request #2231 from phomes/resolve-misc2Tom Gundersen
Resolve misc2
2015-12-28resolve-host: log RR parsing errorsLennart Poettering
2015-12-28resolve-host: add error checkingThomas Hindoe Paaboel Andersen
2015-12-26resolved: gather statistics about resolved namesLennart Poettering
This collects statistical data about transactions, dnssec verifications and the cache, and exposes it over the bus. The systemd-resolve-host tool learns new options to query these statistics and reset them.
2015-12-26resolved: internalize string buffer of dns_resource_record_to_string()Lennart Poettering
Let's simplify usage and memory management of DnsResourceRecord's dns_resource_record_to_string() call: cache the formatted string as part of the object, and return it on subsequent calls, freeing it when the DnsResourceRecord itself is freed.
2015-12-26resolve-host: propagate error properlyLennart Poettering
2015-12-18resolved: rework mDNS cache-flush bit handlingLennart Poettering
This adds a new DnsAnswer item flag "DNS_ANSWER_SHARED_OWNER" which is set for mDNS RRs that lack the cache-flush bit. The cache-flush bit is removed from the DnsResourceRecord object in favour of this. This also splits out the code that removes previous entries when adding new positive ones into a new separate call dns_cache_remove_previous().
2015-12-18resolved: move DNS class utilities to dns-type.c and add more helpersLennart Poettering
Let's make DNS class helpers more like DNS type helpers, let's move them from resolved-dns-rr.[ch] into dns-type.[ch]. This also adds two new calls dns_class_is_pseudo() and dns_class_is_valid_rr() which operate similar to dns_type_is_pseudo() and dns_type_is_valid_rr() but for classes instead of types. This should hopefully make handling of DNS classes and DNS types more alike.
2015-12-03resolved: add a concept of "authenticated" responsesLennart Poettering
This adds a new SD_RESOLVED_AUTHENTICATED flag for responses we return on the bus. When set, then the data has been authenticated. For now this mostly reflects the DNSSEC AD bit, if DNSSEC=trust is set. As soon as the client-side validation is complete it will be hooked up to this flag too. We also set this bit whenver we generated the data ourselves, for example, because it originates in our local LLMNR zone, or from the built-in trust anchor database. The "systemd-resolve-host" tool has been updated to show the flag state for the data it shows.
2015-11-27tree-wide: expose "p"-suffix unref calls in public APIs to make gcc cleanup easyLennart Poettering
GLIB has recently started to officially support the gcc cleanup attribute in its public API, hence let's do the same for our APIs. With this patch we'll define an xyz_unrefp() call for each public xyz_unref() call, to make it easy to use inside a __attribute__((cleanup())) expression. Then, all code is ported over to make use of this. The new calls are also documented in the man pages, with examples how to use them (well, I only added docs where the _unref() call itself already had docs, and the examples, only cover sd_bus_unrefp() and sd_event_unrefp()). This also renames sd_lldp_free() to sd_lldp_unref(), since that's how we tend to call our destructors these days. Note that this defines no public macro that wraps gcc's attribute and makes it easier to use. While I think it's our duty in the library to make our stuff easy to use, I figure it's not our duty to make gcc's own features easy to use on its own. Most likely, client code which wants to make use of this should define its own: #define _cleanup_(function) __attribute__((cleanup(function))) Or similar, to make the gcc feature easier to use. Making this logic public has the benefit that we can remove three header files whose only purpose was to define these functions internally. See #2008.
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
2015-11-23resolved: add ResolveService() bus call for resolving SRV and DNS-SD servicesLennart Poettering
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.
2015-11-16tree-wide: sort includesThomas Hindoe Paaboel Andersen
Sort the includes accoding to the new coding style.
2015-11-03parse-util: introduce parse_ifindex() and make use of it everywhereLennart Poettering
We have enough places where we parse an ifindex, hence introduce a proper parsing function for it, that verifies all parameters.
2015-10-27util-lib: split out allocation calls into alloc-util.[ch]Lennart Poettering
2015-10-27util-lib: split string parsing related calls from util.[ch] into parse-util.[ch]Lennart Poettering
2015-09-29util: introduce common version() implementation and use it everywhereLennart Poettering
This also allows us to drop build.h from a ton of files, hence do so. Since we touched the #includes of those files, let's order them properly according to CODING_STYLE.
2015-09-09tree-wide: drop {} from one-line if blocksLennart Poettering
Patch via coccinelle.
2015-08-24resolve-host: support parsing numeric interface namesLennart Poettering
If the user specifies an interface by its ifindex we should handle this nicely. Hence let's try to parse the ifindex as a number before we try to resolve it as an interface name.
2015-08-21resolve-host: Minor wording improvementLennart Poettering
2015-08-21resolved: when passing RRs across the bus, make sure not to use name compressionLennart Poettering
We explicitly need to turn off name compression when marshalling or demarshalling RRs for bus transfer, since they otherwise refer to packet offsets that reference packets that are not transmitted themselves.
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.
2015-08-16resolve-host: print RTTTom Gundersen
2015-08-16resolve-host: enable auto start of resolvedLennart Poettering
There's no reason to explicitly turn off bus activation for resolved here. The reason this was done before was that the code was copied from nss-resolve, which has a fallback to glibc's nss-dns if resolved is not reachable. However, such a logic makes no sense for resolve-host since such a fallback doesn't make sense here, which means we can actually turn on activation. Let's do it hence.
2015-07-09resolve-host: enable dbus-activationDavid Herrmann
Right now, systemd-resolve-host fails if resolved is not running. However, resolved supports bus-activation (at least on kdbus) just fine. Enable this so we can use resolve-host at all times. This was disabled right from the beginning, without any comment why.
2015-07-03sd-bus: introduce new sd_bus_flush_close_unref() callLennart Poettering
sd_bus_flush_close_unref() is a call that simply combines sd_bus_flush() (which writes all unwritten messages out) + sd_bus_close() (which terminates the connection, releasing all unread messages) + sd_bus_unref() (which frees the connection). The combination of this call is used pretty frequently in systemd tools right before exiting, and should also be relevant for most external clients, and is hence useful to cover in a call of its own. Previously the combination of the three calls was already done in the _cleanup_bus_close_unref_ macro, but this was only available internally. Also see #327
2015-02-23remove unused includesThomas Hindoe Paaboel Andersen
This patch removes includes that are not used. The removals were found with include-what-you-use which checks if any of the symbols from a header is in use.
2014-12-10sd-bus: move common errors src/shared/bus-errors.h → ↵Lennart Poettering
src/libsystemd/sd-bus/bus-common-errors.h Stuff in src/shared/ should not use stuff from src/libsystemd/ really.
2014-11-28treewide: another round of simplificationsMichal Schmidt
Using the same scripts as in f647962d64e "treewide: yet more log_*_errno + return simplifications".
2014-11-28treewide: use log_*_errno whenever %m is in the format stringMichal Schmidt
If the format string contains %m, clearly errno must have a meaningful value, so we might as well use log_*_errno to have ERRNO= logged. Using: find . -name '*.[ch]' | xargs sed -r -i -e \ 's/log_(debug|info|notice|warning|error|emergency)\((".*%m.*")/log_\1_errno(errno, \2/' Plus some whitespace, linewrap, and indent adjustments.
2014-11-28treewide: no need to negate errno for log_*_errno()Michal Schmidt
It corrrectly handles both positive and negative errno values.
2014-11-28treewide: auto-convert the simple cases to log_*_errno()Michal Schmidt
As a followup to 086891e5c1 "log: add an "error" parameter to all low-level logging calls and intrdouce log_error_errno() as log calls that take error numbers", use sed to convert the simple cases to use the new macros: find . -name '*.[ch]' | xargs sed -r -i -e \ 's/log_(debug|info|notice|warning|error|emergency)\("(.*)%s"(.*), strerror\(-([a-zA-Z_]+)\)\);/log_\1_errno(-\4, "\2%m"\3);/' Multi-line log_*() invocations are not covered. And we also should add log_unit_*_errno().
2014-08-20cmdline: for new tools avoid introduce new negative switches, and properly ↵Lennart Poettering
align --help texts Negative switches are a bad un-normalized thing. We alerady have some, but we should try harder to avoid intrdoucing new ones. Hence, instead of adding two switches: --foobar --no-foobar Let's instead use the syntax --foobar --foobar=yes --foobar=no Where the first two are equivalent. The boolean argument is parsed following the usual rules. Change all new negative switches this way. This patch also properly aligns the --help table, so that single char switches always get a column separate of the long switches.
2014-08-14resolved: allow passing on which protocol, family and interface to look ↵Lennart Poettering
something up Also, return on which protocol/family/interface we found something.
2014-08-04resolve-host: properly align long arguments in help textLennart Poettering
2014-08-04bus: always explicitly close bus from main programsLennart Poettering
Since b5eca3a2059f9399d1dc52cbcf9698674c4b1cf0 we don't attempt to GC busses anymore when unsent messages remain that keep their reference, when they otherwise are not referenced anymore. This means that if we explicitly want connections to go away, we need to close them. With this change we will no do so explicitly wherver we connect to the bus from a main program (and thus know when the bus connection should go away), or when we create a private bus connection, that really should go away after our use. This fixes connection leaks in the NSS and PAM modules.
2014-08-03resolve-host: fix missed search&replaceZbigniew Jędrzejewski-Szmek
2014-08-03resolve-host: make arg_type an intZbigniew Jędrzejewski-Szmek
We are using it also to store _DNS_TYPE_INVALID, so it should be signed.
2014-08-03Unify parse_argv styleZbigniew Jędrzejewski-Szmek
getopt is usually good at printing out a nice error message when commandline options are invalid. It distinguishes between an unknown option and a known option with a missing arg. It is better to let it do its job and not use opterr=0 unless we actually want to suppress messages. So remove opterr=0 in the few places where it wasn't really useful. When an error in options is encountered, we should not print a lengthy help() and overwhelm the user, when we know precisely what is wrong with the commandline. In addition, since help() prints to stdout, it should not be used except when requested with -h or --help. Also, simplify things here and there.
2014-08-03resolve-host: use correct format specifierThomas Hindoe Paaboel Andersen
2014-07-31resolve-host: list types and classesZbigniew Jędrzejewski-Szmek
Also update systemctl to similar style.
2014-07-30resolved: add API for resolving specific RRsLennart Poettering
2014-07-30resolve-host: add reverse lookup supportLennart Poettering
2014-07-30resolve-host: use the usual log message when encountering a dbus parse failureLennart Poettering
2014-07-30resolved: add tool to query resolvedZbigniew Jędrzejewski-Szmek