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6lowpan: add generic 6lowpan netdev private data

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This patch introduced the 6lowpan netdev private data struct. We name it
lowpan_priv and it's placed at the beginning of netdev private data. All
lowpan interfaces should allocate this room at first of netdev private
data. 6LoWPAN LL private data can be allocate by additional netdev private
data, e.g. dev->priv_size should be "sizeof(struct lowpan_priv) +
sizeof(LL_LOWPAN_PRIVATE_DATA)".

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Alexander Aring
2015-08-11 21:44:08 +02:00
committed by Marcel Holtmann
parent a42bbba5af
commit b72f6f51dc
6 changed files with 55 additions and 6 deletions
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23
include/net/6lowpan.h
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@@ -197,6 +197,27 @@
#define LOWPAN_NHC_UDP_CS_P_11 0xF3 /* source & dest = 0xF0B + 4bit inline */
#define LOWPAN_NHC_UDP_CS_C 0x04 /* checksum elided */
#define LOWPAN_PRIV_SIZE(llpriv_size) \
(sizeof(struct lowpan_priv) + llpriv_size)
enum lowpan_lltypes {
LOWPAN_LLTYPE_BTLE,
LOWPAN_LLTYPE_IEEE802154,
};
struct lowpan_priv {
enum lowpan_lltypes lltype;
/* must be last */
u8 priv[0] __aligned(sizeof(void *));
};
static inline
struct lowpan_priv *lowpan_priv(const struct net_device *dev)
{
return netdev_priv(dev);
}
#ifdef DEBUG
/* print data in line */
static inline void raw_dump_inline(const char *caller, char *msg,
@@ -372,6 +393,8 @@ lowpan_uncompress_size(const struct sk_buff *skb, u16 *dgram_offset)
return skb->len + uncomp_header - ret;
}
void lowpan_netdev_setup(struct net_device *dev, enum lowpan_lltypes lltype);
int
lowpan_header_decompress(struct sk_buff *skb, struct net_device *dev,
const u8 *saddr, const u8 saddr_type,