diff options
| author | alex.bluesman.smirnov@gmail.com <alex.bluesman.smirnov@gmail.com> | 2011-11-10 07:38:38 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-11-14 00:19:42 -0500 |
| commit | 719269afbc69ab96339aad6c2d3b32f7d8311146 (patch) | |
| tree | 26a25b23d982a8bccaa807ac813e3b387d133697 /net/ieee802154/6lowpan.h | |
| parent | 2a24444f8f2bea694003e3eac5c2f8d9a386bdc5 (diff) | |
6LoWPAN: add fragmentation support
This patch adds support for frame fragmentation.
Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ieee802154/6lowpan.h')
| -rw-r--r-- | net/ieee802154/6lowpan.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/net/ieee802154/6lowpan.h b/net/ieee802154/6lowpan.h index 5d8cf80b930..5d2e5a03742 100644 --- a/net/ieee802154/6lowpan.h +++ b/net/ieee802154/6lowpan.h @@ -159,6 +159,24 @@ #define LOWPAN_DISPATCH_FRAG1 0xc0 /* 11000xxx */ #define LOWPAN_DISPATCH_FRAGN 0xe0 /* 11100xxx */ +#define LOWPAN_DISPATCH_MASK 0xf8 /* 11111000 */ + +#define LOWPAN_FRAG_TIMEOUT (HZ * 60) /* time-out 60 sec */ + +#define LOWPAN_FRAG1_HEAD_SIZE 0x4 +#define LOWPAN_FRAGN_HEAD_SIZE 0x5 + +/* + * According IEEE802.15.4 standard: + * - MTU is 127 octets + * - maximum MHR size is 37 octets + * - MFR size is 2 octets + * + * so minimal payload size that we may guarantee is: + * MTU - MHR - MFR = 88 octets + */ +#define LOWPAN_FRAG_SIZE 88 + /* * Values of fields within the IPHC encoding first byte * (C stands for compressed and I for inline) |