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: expose "p"-suffix unref calls in public APIs to make gcc cleanup easy 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.

tree-wide: sort includes in *.h This is a continuation of the previous include sort patch, which only sorted for .c files.

hashmap: refactor hash_func All our hash functions are based on siphash24(), factor out siphash_init() and siphash24_finalize() and pass the siphash state to the hash functions rather than the hash key. This simplifies the hash functions, and in particular makes composition simpler as calling siphash24_compress() repeatedly on separate chunks of input has the same effect as first concatenating the input and then calling siphash23_compress() on the result.

sd-dhcp-server: simplify pool creation Merge sd_dhcp_server_set_address() and sd_dhcp_server_set_lease_pool() into sd_dhcp_server_configure_pool() as the behavior of the two former depends on the order they are called in. The flexibility is not needed, so let's just do this in one call.

sd-dhcp-server: improve predictability of leases Rather than having all clients attempt to get the same leases (starting at the beginning of the pool), make each client star at a random offset into the pool determined by their client id. This greatly increases the chances of a given client receiving the same IP address even though both the client and server have lost any lease information (and distinct server instances handing out the same leases).

dhcp,network: support emitting DNS/NTP server information from DHCP server For now, this is very simple and IP addresses have to be configured manually.

networkd: make DHCP lease timeouts configurable

dhcp: rename index to ifindex This avoids confusion what this is, in particular as libc knows an index() function.

dhcp: store client id as void*, since we dont know what it is

dhcp: stop using refcnt.h No need to invole atomic ops in single-threaded APIs, let's simplify this.

dhcp,network: implement RFC 4833 (DHCP Timezone option) This one is simply to add: encode the tzdata timezone in the DHCP options and optionally make use of it.

#pragma once here and there

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");

sd-dhcp-server: always send out ROUTER and SUBNET_MASK For now we simply take these values from the server's address.

sd-dhcp-server: add forcerenew support

sd-dhcp-server: track bound leases Make sure we don't hand out the same IP twice. We still don't handle lease expiry.

sd-dhcp-server: add support for clients requesting lease lifetime

sd-dhcp-server: add basic REQUEST/ACK support

sd-dhcp-server: add support for sending messages

sd-dhcp-server: add support for setting the server address

sd-dhcp-server: bind to raw socket for sending We would like to use the UDP socket, but we cannot as we need to specify the MAC address manually.

sd-dhcp-server: add basic message parsing Parse the maximum message size the client can accept and the client id, falling back to sane defaults if they are not set.

sd-dhcp-server: add basic message handling and verification

sd-dhcp-server: bind to a given interface We will (at least at first), restrict our focus to running the server on at most one interface.

sd-dhcp-server: add basic functionality for starting/stopping server Bind to UDP socket and listen for messages, discarding anything we receive.

sd-dhcp-server: add basic functionality for creating/destroying server instance