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6lowpan: set and use mac_len for mac header length 

Set the mac header length while creating the 802.15.4 mac header.

Drop the function for recalculate mac header length in upper layers
which was static and works for intra pan communication only.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Reviewed-by: Werner Almesberger <werner@almesberger.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Aring 2013-10-30 09:18:22 +01:00 committed by David S. Miller
parent 3961532fd4
commit 3e69162ea4
2 changed files with 3 additions and 12 deletions
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13
net/ieee802154/6lowpan.c
View File

@ -1100,17 +1100,6 @@ static int lowpan_set_address(struct net_device *dev, void *p)
return 0;
}
static int lowpan_get_mac_header_length(struct sk_buff *skb)
{
/*
* Currently long addressing mode is supported only, so the overall
* header size is 21:
* FC SeqNum DPAN DA SA Sec
* 2 + 1 + 2 + 8 + 8 + 0 = 21
*/
return 21;
}
static int
lowpan_fragment_xmit(struct sk_buff *skb, u8 *head,
int mlen, int plen, int offset, int type)
@ -1150,7 +1139,7 @@ lowpan_skb_fragmentation(struct sk_buff *skb, struct net_device *dev)
int err, header_length, payload_length, tag, offset = 0;
u8 head[5];
header_length = lowpan_get_mac_header_length(skb);
header_length = skb->mac_len;
payload_length = skb->len - header_length;
tag = lowpan_dev_info(dev)->fragment_tag++;

2
net/mac802154/wpan.c
View File

@ -208,6 +208,8 @@ static int mac802154_header_create(struct sk_buff *skb,
head[1] = fc >> 8;
memcpy(skb_push(skb, pos), head, pos);
skb_reset_mac_header(skb);
skb->mac_len = pos;
return pos;
}