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uapi: fix big endian definition of ipv6_rpl_sr_hdr

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Following RFC 6554 [1], the current order of fields is wrong for big
endian definition. Indeed, here is how the header looks like:

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|  Next Header  |  Hdr Ext Len  | Routing Type  | Segments Left |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| CmprI | CmprE |  Pad  |               Reserved                |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

This patch reorders fields so that big endian definition is now correct.

  [1] https://tools.ietf.org/html/rfc6554#section-3

Fixes: cfa933d938 ("include: uapi: linux: add rpl sr header definition")
Signed-off-by: Justin Iurman <justin.iurman@uliege.be>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Justin Iurman 2021-01-21 23:00:44 +01:00 • committed by Jakub Kicinski
parent 62d9f1a694
commit 07d46d93c9
1 changed files with 3 additions and 3 deletions
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6
include/uapi/linux/rpl.h
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@ -28,10 +28,10 @@ struct ipv6_rpl_sr_hdr {
pad:4,
reserved1:16;
#elif defined(__BIG_ENDIAN_BITFIELD)
__u32 reserved:20,
__u32 cmpri:4,
cmpre:4,
pad:4,
cmpri:4,
cmpre:4;
reserved:20;
#else
#error "Please fix <asm/byteorder.h>"
#endif