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| author | Alexander Aring <alex.aring@gmail.com> | 2015-09-02 14:21:31 +0200 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2015-09-17 13:20:04 +0200 |
| commit | 187625e18498ff0f3738a059778a8578171f06c8 (patch) | |
| tree | d90708bc1bf652ff508729742a93c5059b5e4215 /net/ieee802154 | |
| parent | 0c4349687fb6de660b24d3498d12e068f0320425 (diff) | |
| download | lwn-187625e18498ff0f3738a059778a8578171f06c8.tar.gz lwn-187625e18498ff0f3738a059778a8578171f06c8.zip | |
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')
| -rw-r--r-- | net/ieee802154/6lowpan/tx.c | 18 |
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; } |