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authorAlexander Aring <alex.aring@gmail.com>2015-09-02 14:21:31 +0200
committerMarcel Holtmann <marcel@holtmann.org>2015-09-17 13:20:04 +0200
commit187625e18498ff0f3738a059778a8578171f06c8 (patch)
treed90708bc1bf652ff508729742a93c5059b5e4215 /net/ieee802154/6lowpan
parent0c4349687fb6de660b24d3498d12e068f0320425 (diff)
ieee802154: 6lowpan: remove tx full-size calc workaround
This patch removes a workaround for datagram_size calculation while doing fragmentation on transmit. Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/ieee802154/6lowpan')
-rw-r--r--net/ieee802154/6lowpan/tx.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/net/ieee802154/6lowpan/tx.c b/net/ieee802154/6lowpan/tx.c
index 9a2147e7f600..54939d031ea5 100644
--- a/net/ieee802154/6lowpan/tx.c
+++ b/net/ieee802154/6lowpan/tx.c
@@ -123,16 +123,14 @@ lowpan_xmit_fragment(struct sk_buff *skb, const struct ieee802154_hdr *wpan_hdr,
static int
lowpan_xmit_fragmented(struct sk_buff *skb, struct net_device *ldev,
- const struct ieee802154_hdr *wpan_hdr)
+ const struct ieee802154_hdr *wpan_hdr, u16 dgram_size,
+ u16 dgram_offset)
{
- u16 dgram_size, dgram_offset;
__be16 frag_tag;
u8 frag_hdr[5];
int frag_cap, frag_len, payload_cap, rc;
int skb_unprocessed, skb_offset;
- dgram_size = lowpan_uncompress_size(skb, &dgram_offset) -
- skb->mac_len;
frag_tag = htons(lowpan_dev_info(ldev)->fragment_tag);
lowpan_dev_info(ldev)->fragment_tag++;
@@ -187,7 +185,8 @@ err:
return rc;
}
-static int lowpan_header(struct sk_buff *skb, struct net_device *ldev)
+static int lowpan_header(struct sk_buff *skb, struct net_device *ldev,
+ u16 *dgram_size, u16 *dgram_offset)
{
struct wpan_dev *wpan_dev = lowpan_dev_info(ldev)->wdev->ieee802154_ptr;
struct ieee802154_addr sa, da;
@@ -201,7 +200,10 @@ static int lowpan_header(struct sk_buff *skb, struct net_device *ldev)
daddr = &info.daddr.u.extended_addr;
saddr = &info.saddr.u.extended_addr;
+ *dgram_size = skb->len;
lowpan_header_compress(skb, ldev, ETH_P_IPV6, daddr, saddr, skb->len);
+ /* dgram_offset = (saved bytes after compression) + lowpan header len */
+ *dgram_offset = (*dgram_size - skb->len) + skb_network_header_len(skb);
cb->type = IEEE802154_FC_TYPE_DATA;
@@ -234,6 +236,7 @@ netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *ldev)
{
struct ieee802154_hdr wpan_hdr;
int max_single, ret;
+ u16 dgram_size, dgram_offset;
pr_debug("package xmit\n");
@@ -244,7 +247,7 @@ netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *ldev)
if (!skb)
return NET_XMIT_DROP;
- ret = lowpan_header(skb, ldev);
+ ret = lowpan_header(skb, ldev, &dgram_size, &dgram_offset);
if (ret < 0) {
kfree_skb(skb);
return NET_XMIT_DROP;
@@ -264,7 +267,8 @@ netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *ldev)
netdev_tx_t rc;
pr_debug("frame is too big, fragmentation is needed\n");
- rc = lowpan_xmit_fragmented(skb, ldev, &wpan_hdr);
+ rc = lowpan_xmit_fragmented(skb, ldev, &wpan_hdr, dgram_size,
+ dgram_offset);
return rc < 0 ? NET_XMIT_DROP : rc;
}