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6lowpan: move lowpan frag_info out of 802.15.4 headers

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Fragmentation and reassembly information for 6lowpan is independent from
the 802.15.4 stack and used only by the 6lowpan reassembly process. Move
the ieee802154_frag_info struct to a private are, it needn't be in the
802.15.4 skb control block.

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Phoebe Buckheister 2014-03-14 21:24:03 +01:00 committed by David S. Miller
parent ae531b9475
commit a13061ec04
2 changed files with 18 additions and 17 deletions
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8
include/net/ieee802154_netdev.h
View File

@ -187,13 +187,6 @@ static inline void ieee802154_addr_to_sa(struct ieee802154_addr_sa *sa,
}
}
struct ieee802154_frag_info {
__be16 d_tag;
u16 d_size;
u8 d_offset;
};
/*
* A control block of skb passed between the ARPHRD_IEEE802154 device
* and other stack parts.
@ -202,7 +195,6 @@ struct ieee802154_mac_cb {
u8 lqi;
u8 flags;
u8 seq;
struct ieee802154_frag_info frag_info;
struct ieee802154_addr source;
struct ieee802154_addr dest;
};

27
net/ieee802154/reassembly.c
View File

@ -30,6 +30,17 @@
#include "reassembly.h"
struct lowpan_frag_info {
__be16 d_tag;
u16 d_size;
u8 d_offset;
};
struct lowpan_frag_info *lowpan_cb(struct sk_buff *skb)
{
return (struct lowpan_frag_info *)skb->cb;
}
static struct inet_frags lowpan_frags;
static int lowpan_frag_reasm(struct lowpan_frag_queue *fq,
@ -102,7 +113,7 @@ static void lowpan_frag_expire(unsigned long data)
}
static inline struct lowpan_frag_queue *
fq_find(struct net *net, const struct ieee802154_frag_info *frag_info,
fq_find(struct net *net, const struct lowpan_frag_info *frag_info,
const struct ieee802154_addr *src,
const struct ieee802154_addr *dst)
{
@ -137,8 +148,8 @@ static int lowpan_frag_queue(struct lowpan_frag_queue *fq,
if (fq->q.last_in & INET_FRAG_COMPLETE)
goto err;
offset = mac_cb(skb)->frag_info.d_offset << 3;
end = mac_cb(skb)->frag_info.d_size;
offset = lowpan_cb(skb)->d_offset << 3;
end = lowpan_cb(skb)->d_size;
/* Is this the final fragment? */
if (offset + skb->len == end) {
@ -164,15 +175,13 @@ static int lowpan_frag_queue(struct lowpan_frag_queue *fq,
* this fragment, right?
*/
prev = fq->q.fragments_tail;
if (!prev || mac_cb(prev)->frag_info.d_offset <
mac_cb(skb)->frag_info.d_offset) {
if (!prev || lowpan_cb(prev)->d_offset < lowpan_cb(skb)->d_offset) {
next = NULL;
goto found;
}
prev = NULL;
for (next = fq->q.fragments; next != NULL; next = next->next) {
if (mac_cb(next)->frag_info.d_offset >=
mac_cb(skb)->frag_info.d_offset)
if (lowpan_cb(next)->d_offset >= lowpan_cb(skb)->d_offset)
break; /* bingo! */
prev = next;
}
@ -319,7 +328,7 @@ static int lowpan_frag_reasm(struct lowpan_frag_queue *fq, struct sk_buff *prev,
}
static int lowpan_get_frag_info(struct sk_buff *skb, const u8 frag_type,
struct ieee802154_frag_info *frag_info)
struct lowpan_frag_info *frag_info)
{
bool fail;
u8 pattern = 0, low = 0;
@ -346,7 +355,7 @@ int lowpan_frag_rcv(struct sk_buff *skb, const u8 frag_type)
{
struct lowpan_frag_queue *fq;
struct net *net = dev_net(skb->dev);
struct ieee802154_frag_info *frag_info = &mac_cb(skb)->frag_info;
struct lowpan_frag_info *frag_info = lowpan_cb(skb);
struct ieee802154_addr source, dest;
int err;