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In order to implement tests for the LLDP state machine, we need to
mock lldp_network_bind_raw_socket(). Move the other function
lldp_receive_packet() to another file so that we can replace the first
function with a custom one and keep the second one.
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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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These functions are going to be exported, swap the 'data' and 'length'
arguments so that their signature is consistent with the rest of the
code.
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A follow-up to 3733eec3e292e4ddb4cba5eb8d3bd8cbee7102d8
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* (potentially) public headers must reside in src/systemd/ (not in
src/libsystemd*)
* some private (not prefixed with sd_) functions moved from sd-lldp.h to
lldp-internal.h
* introduce lldp-util.h for the cleanup macro, as these should not be public
* rename the cleanup macro, we always name them _cleanup_foo_, never
_cleanup_sd_foo_
* mark some function arguments as 'const'
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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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