commit e4ca6d9854dc252e294007fc91249ce34d9a82e8
author Andrei Emeltchenko <andrei.emeltchenko@intel.com> Tue Oct 11 13:37:52 2011 +0300
committer Gustavo F. Padovan <padovan@profusion.mobi> Thu Oct 13 16:50:14 2011 -0300
tree 7fb26dbe1312aab0c38811ef695482f033d5995f
parent e37817353bf94a4e00faad78ffb8cc07f8556252

Bluetooth: EWS: recalculate L2CAP header size

Recalculate length of L2CAP header based on Control field length.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

net/bluetooth/l2cap_core.c

diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 97aa545..439e715 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -566,12 +566,17 @@
 	struct sk_buff *skb;
 	struct l2cap_hdr *lh;
 	struct l2cap_conn *conn = chan->conn;
-	int count, hlen = L2CAP_HDR_SIZE + 2;
+	int count, hlen;
 	u8 flags;
 
 	if (chan->state != BT_CONNECTED)
 		return;
 
+	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
+		hlen = L2CAP_EXT_HDR_SIZE;
+	else
+		hlen = L2CAP_ENH_HDR_SIZE;
+
 	if (chan->fcs == L2CAP_FCS_CRC16)
 		hlen += 2;
 
@@ -1534,7 +1539,7 @@
 	struct sock *sk = chan->sk;
 	struct l2cap_conn *conn = chan->conn;
 	struct sk_buff *skb;
-	int err, count, hlen = L2CAP_HDR_SIZE + 2;
+	int err, count, hlen;
 	struct l2cap_hdr *lh;
 
 	BT_DBG("sk %p len %d", sk, (int)len);
@@ -1542,6 +1547,11 @@
 	if (!conn)
 		return ERR_PTR(-ENOTCONN);
 
+	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
+		hlen = L2CAP_EXT_HDR_SIZE;
+	else
+		hlen = L2CAP_ENH_HDR_SIZE;
+
 	if (sdulen)
 		hlen += 2;
 
@@ -3098,7 +3108,12 @@
 static int l2cap_check_fcs(struct l2cap_chan *chan,  struct sk_buff *skb)
 {
 	u16 our_fcs, rcv_fcs;
-	int hdr_size = L2CAP_HDR_SIZE + 2;
+	int hdr_size;
+
+	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
+		hdr_size = L2CAP_EXT_HDR_SIZE;
+	else
+		hdr_size = L2CAP_ENH_HDR_SIZE;
 
 	if (chan->fcs == L2CAP_FCS_CRC16) {
 		skb_trim(skb, skb->len - 2);