1582595558.856188 INFO -- Thread-9882: header:42 write_buffer:1076
==9882== Syscall param socketcall.sendto(msg) points to uninitialised byte(s)
==9882== at 0x5174DFA: sendto (sendto.c:27)
==9882== by 0x4E4D763: lifxSession_SendToInternal (lifx_session.c:456)
==9882== by 0x4E4E03C: lifxSession_BeginSendRequest (lifx_session.c:666)
==9882== by 0x108D26: main (async.c:67)
==9882== Address 0x586b386 is 38 bytes inside a block of size 1,076 alloc'd
==9882== at 0x4C2FB0F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==9882== by 0x4E423BD: lifxBuffer_Init (lifx_buffer.c:35)
==9882== by 0x4E4C962: lifxSession_Open (lifx_session.c:160)
==9882== by 0x108C87: main (async.c:50)
==9882==

// {'name': 'Label', 'type': '[32]byte', 'size_bytes': 32}
uint8_t Label[32];

it looks like all places where [n]byte is used is a string. should just make that
char Label[32];

otherwise you have to cast when passing into strcpy() and friends.

// {'name': 'Palette', 'type': '[16]', 'size_bytes': 128}

that didn't parse properly. it generated

lifxLightHsbk_t Palette;

should be

lifxLightHsbk_t Palette[16];

==9882==
==9882== HEAP SUMMARY:
==9882== in use at exit: 5,288 bytes in 6 blocks
==9882== total heap usage: 12 allocs, 6 frees, 12,032 bytes allocated
==9882==
==9882== 272 bytes in 1 blocks are possibly lost in loss record 2 of 5
==9882== at 0x4C31B25: calloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==9882== by 0x40134A6: allocate_dtv (dl-tls.c:286)
==9882== by 0x40134A6: _dl_allocate_tls (dl-tls.c:530)
==9882== by 0x544B227: allocate_stack (allocatestack.c:627)
==9882== by 0x544B227: pthread_create@@GLIBC_2.2.5 (pthread_create.c:644)
==9882== by 0x4E42348: lifxThread_Create (lifx.c:260)
==9882== by 0x4E4CAF8: lifxSession_Open (lifx_session.c:196)
==9882== by 0x108C87: main (async.c:50)
==9882==
==9882== LEAK SUMMARY:
==9882== definitely lost: 0 bytes in 0 blocks
==9882== indirectly lost: 0 bytes in 0 blocks
==9882== possibly lost: 272 bytes in 1 blocks
==9882== still reachable: 5,016 bytes in 5 blocks
==9882== suppressed: 0 bytes in 0 blocks
==9882== Reachable blocks (those to which a pointer was found) are not shown.
==9882== To see them, rerun with: --leak-check=full --show-leak-kinds=all

The lifxProtocolHeader_t doesn't align on windows. An encoder/decoder needs to be written to properly handle this and not reply on the compiler to align stuff properly.

#define LIFX_EXPORT attribute ((visibility ("default")))
#define LIFX_IMPORT attribute ((visibility ("hidden")))

Need to replace this with something compatible with windows declspec import/export.

The code generator should just create a single lifx_protocol.h and lifx_protocol.c. There's no reason to have a bunch.