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Rename struct 'tlv_packet' to 'sd_lldp_packet' and struct
'tlv_section' to 'sd_lldp_section' since the former is referenced in
public header sd-lldp.h.
Signed-off-by: Beniamino Galvani <bgalvani@redhat.com>
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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.
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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.
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Export struct tlv_packet as a public opaque sd_lldp_packet type and
make its accessor functions public.
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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.
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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.
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