tree-wide: remove Emacs lines from all files This should be handled fine now by .dir-locals.el, so need to carry that stuff in every file.

tree-wide: sort includes Sort the includes accoding to the new coding style.

siphash24: change result argument to uint64_t Change the "out" parameter from uint8_t[8] to uint64_t. On architectures which enforce pointer alignment this fixes crashes when we previously cast an unaligned array to uint64_t*, and on others this should at least improve performance as the compiler now aligns these properly. This also simplifies the code in most cases by getting rid of typecasts. The only place which we can't change is struct duid's en.id, as that is _packed_ and public API, so we can't enforce alignment of the "id" field and have to use memcpy instead.

networkd: link - (de)serialize IPv4LL and DHCPv4 addresses This initializes the clients to try rebinding the preexisting addresses before doing anything else.

networkd: route - clean up confusion between 'metric' and 'priority' Different tools use different terms for the same concept, let's try to stick with 'priority', as that is what the netlink API uses.

networkd: route - simplify route_new()

networkd: address - merge _change() into _configure() These functions are almost entirely the same, so avoid duplication.

networkd: link - only consider configured when all addresses are ready We were considering a link configured whilst its IPv6 addresses were still tentative. Fixes issue #650.

networkd: make address_{establish,release}() static No need to expose these functions, but rather call them from address_{add,drop}.

networkd: address - process in manager.c rather than link.c

networkd: route/address - simplify and unify creators Rename new_dynamic() to simply _new() and reuse that from new_static().

tree-wide: remove a number of invocations of strerror() and replace by %m Let's clean up our tree a bit, and reduce invocations of the thread-unsafe strerror() by replacing it with printf()'s %m specifier.

sd-ipv4ll: fix namespacing Prefix all exported constants with SD_IPV4LL_* to avoid namespacing conflicts.

sd-ipv4acd: introduce new library split out from sd-ipv4ll This splits the Address Conflict Detection out of the Link Local library so that we can reuse it for DHCP and static addresses in the future. Implements RFC5227.

sd-ipv4ll: rework callbacks Firstly, no longer distinguish between STOP and INIT states. Secondly, do not trigger STOP events when calls to sd_ipv4ll_*() fail. The caller is the one who would receive the event and will already know that the call to sd_ipv4ll_*() has failed, so it is redundant. STOP events will now only be triggered by calling sd_ipv4ll_stop() explicitly or by some internal error in the library triggered by receiving a packet or an expiring timeout (i.e., any error that would otherwise not be reported back to the consumer of the library). Lastly, follow CODING_STYLE and always return NULL on unref. Protect from objects being destroyed in callbacks accordingly.

sd-netlink: rename from sd-rtnl

networkd: actually always use AddressFamilyBoolean as the bit mask it is

tree-wide: remove spurious space

networkd: generalize IPv4LL to LinkLocal This allows both IPv4 and IPv6 link-local addresses to be enabled or disabled. By default we still enable IPv6LL and disable IPv4LL. The old config option is kept for backwards compatibility, but removed from the documentation.

networkd: manager - enumerate addresses globally, rather than per-link The kernel always returns all addresses, rather than only for the given link, so let's only enumerate once.

log: rearrange log function naming - Rename log_meta() → log_internal(), to follow naming scheme of most other log functions that are usually invoked through macros, but never directly. - Rename log_info_object() to log_object_info(), simply because the object should be before any other parameters, to follow OO-style programming style.

log: add an "error" parameter to all low-level logging calls and intrdouce log_error_errno() as log calls that take error numbers This change has two benefits: - The format string %m will now resolve to the specified error (or to errno if the specified error is 0. This allows getting rid of a ton of strerror() invocations, a function that is not thread-safe. - The specified error can be passed to the journal in the ERRNO= field. Now of course, we just need somebody to convert all cases of this: log_error("Something happened: %s", strerror(-r)); into thus: log_error_errno(-r, "Something happened: %m");

networkd: link - split out ipv4ll handling