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lldp: avoid compiler warnings in lldp_tfl_package_read* functions
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[v2] treewide: treatment of errno and other cleanups
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it would set errno only for an invalid address family.
Also fix a copy&paste error in one error string.
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It is really unclear if we want to / have the resources to support this fully, so drop it
for now. It can easily be brought back if a killer usecase emerges.
Note that this code was never hooked up, so this does not remove any features.
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gcc 5.1.1 wrongly warns about uninitialized variable @r2 when compiling
with "-Og". Refactor the code to avoid the warnings.
Fixes: 564cabd46c7c1532ad4d562bf8332eaed49ac201
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There are more than enough to deserve their own .c file, hence move them
over.
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Exported header files should not include internal headers. Fix that.
Exported header files should not use the bool type. So far we opted to
stick to C89 for exported headers, and hence use "int" for bools in
them. Continue to do so.
Exported header files should have #include lines for everything they use
including inttypes.h and sys/types.h, so that they may be included in
any order.
Exported header files should have C++ guards, hence add them.
Exported header files should not use gcc extensions like #pragma once,
get rid of it.
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string-util.[ch]
There are more than enough calls doing string manipulations to deserve
its own files, hence do something about it.
This patch also sorts the #include blocks of all files that needed to be
updated, according to the sorting suggestions from CODING_STYLE. Since
pretty much every file needs our string manipulation functions this
effectively means that most files have sorted #include blocks now.
Also touches a few unrelated include files.
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Only callback on error when the statemachine is in a truly broken state. This
is now only the case when we fail to rearm a timer.
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This is unused, and in the future we will pass prefixes and prefixlengths directly
to the callbacks when needed rather than having to search for them.
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This is no longer used.
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The caller of the library is no longer notified, so triggering a timer
just to clean up is not necessary. Instead check for and clean up
invalid prefixes lazily.
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This follows the coding style, and allows some simplification to the rest of the code.
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The caller should push any lifetime information into the kernel and let the kernel handle
prefix expiration.
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There is no need to assign valuse to the states. Also add _INVALID and _MAX,
even though these are not used, it keeps it consistent.
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The actual code rename will follow. The reason for the change of name is to make it
simpler and more uniform with how we name other libraries (we don't include the
underlying protocol). The new name also matches the naming in the kernel (which
is particularly relevent here as we expect to let the kernel do some parts of
the protocol and we do others).
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This is useful in case the daemon is restarted and the state of the IPv4LL client should
be serialized/deserialized.
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We don't care about timestamps down to the last usec, round to the closest sec
as that will be plenty for debugging purposes.
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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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Make the API of the new helpers more similar to the old wrapper.
In particular we now return the hash as a byte string to avoid
any endianness problems.
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hashmap/siphash24: refactor hash functions
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Make sure all variable-length inputs are properly terminated or that
their length is encoded in some way. This avoids ambiguity of
adjacent inputs.
E.g., in case of a hash function taking two strings, compressing "ab"
followed by "c" is now distinct from "a" followed by "bc".
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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.
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Add some tests to simulate the reception of LLDP frames and to verify
the correctness of the data in the MIB.
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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).
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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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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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Add a public function to get a list of current LLDP neighbours' TLV
packets. The function populates an array of pointers to the opaque
type sd_lldp_packet and returns the number of elements found. Callers
must take care of freeing the array and decreasing the refcount of
elements when done.
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Move some public functions from lldp-internal.c to lldp-tlv.c, as now
they are not internal functions anymore.
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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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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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DHCP and journal remoting fix, as well as NEWS update
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sd-pppoe: use strna() instead of strempty()
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Fixes #1337
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