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.

doc: correct orthography, word forms and missing/extraneous words

lldp: avoid compiler warnings in lldp_tfl_package_read* functions gcc 5.1.1 wrongly warns about uninitialized variable @r2 when compiling with "-Og". Refactor the code to avoid the warnings. Fixes: 564cabd46c7c1532ad4d562bf8332eaed49ac201

util-lib: split out allocation calls into alloc-util.[ch]

lldp: fix parsing of TLV length tlv_packet_read_bytes() and tlv_packet_read_string() returned the wrong length when called after other functions which modify the offset in the container. In other words, if the TLV data length is X and we do a tlv_packet_read_u8(), a subsequent tlv_packet_read_bytes() should return a length of (X - 1).

lldp: check return value of lldp_tlv_packet_exit_container()

lldp: add support for organizationally specific TLVs LLDP TLVs of type 127 are used to carry organizationally specific information and include additional fields to specify the OUI and subtype. Add support for parsing such fields and functions to access the most common IEEE 802.1 specific TLVs.

lldp: factor out common code in lldp-tlv.c

lldp: add sd_lldp_tlv_packet_get_destination_type() It can be useful to know the destination address of a LLDP frame because it determines the scope of propagation of the frame and thus this information be used to know whether the neighbor is connected to the same physical link. See clause 7.1 of IEEE Std 802.1AB-2009.

lldp: move TLV related functions to lldp-tlv.c Move some public functions from lldp-internal.c to lldp-tlv.c, as now they are not internal functions anymore.

lldp: export opaque TLV type and accessor functions Export struct tlv_packet as a public opaque sd_lldp_packet type and make its accessor functions public.

lldp: add reference counter to struct tlv_packet Add a reference counter to the tlv_packet structure so that it can be shared between multiple users and properly free'd when no longer in use.

tree-wide: remove spurious space

fix gcc warnings about uninitialized variables like: src/shared/install.c: In function ‘unit_file_lookup_state’: src/shared/install.c:1861:16: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] return r < 0 ? r : state; ^ src/shared/install.c:1796:13: note: ‘r’ was declared here int r; ^

networkd: Introduce Link Layer Discovery Protocol (LLDP) This patch introduces LLDP support to networkd. it implements the receiver side of the protocol. The Link Layer Discovery Protocol (LLDP) is an industry-standard, vendor-neutral method to allow networked devices to advertise capabilities, identity, and other information onto a LAN. The Layer 2 protocol, detailed in IEEE 802.1AB-2005.LLDP allows network devices that operate at the lower layers of a protocol stack (such as Layer 2 bridges and switches) to learn some of the capabilities and characteristics of LAN devices available to higher layer protocols.