From: Andrei Emeltchenko <andrei.emeltchenko@xxxxxxxxx>
Remove magic numbers for FCS and SDU LEN
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@xxxxxxxxx>
---
net/bluetooth/l2cap_core.c | 40 +++++++++++++++++++++++-----------------
1 files changed, 23 insertions(+), 17 deletions(-)
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index cd61509..0d72a82 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -587,7 +587,7 @@ static inline void l2cap_send_sframe(struct l2cap_chan *chan, u32 control)
hlen = L2CAP_ENHANCED_HDR_SIZE;
if (chan->fcs == L2CAP_FCS_CRC16)
- hlen += 2;
+ hlen += L2CAP_FCS_SIZE;
BT_DBG("chan %p, control 0x%8.8x", chan, control);
@@ -612,8 +612,8 @@ static inline void l2cap_send_sframe(struct l2cap_chan *chan, u32 control)
__put_control_put(chan, control, skb);
if (chan->fcs == L2CAP_FCS_CRC16) {
- u16 fcs = crc16(0, (u8 *)lh, count - 2);
- put_unaligned_le16(fcs, skb_put(skb, 2));
+ u16 fcs = crc16(0, (u8 *)lh, count - L2CAP_FCS_SIZE);
+ put_unaligned_le16(fcs, skb_put(skb, L2CAP_FCS_SIZE));
}
if (lmp_no_flush_capable(conn->hcon->hdev))
@@ -1290,8 +1290,10 @@ static void l2cap_streaming_send(struct l2cap_chan *chan)
__put_control(chan, control, skb->data + L2CAP_HDR_SIZE);
if (chan->fcs == L2CAP_FCS_CRC16) {
- fcs = crc16(0, (u8 *)skb->data, skb->len - 2);
- put_unaligned_le16(fcs, skb->data + skb->len - 2);
+ fcs = crc16(0, (u8 *)skb->data,
+ skb->len - L2CAP_FCS_SIZE);
+ put_unaligned_le16(fcs,
+ skb->data + skb->len - L2CAP_FCS_SIZE);
}
l2cap_do_send(chan, skb);
@@ -1340,8 +1342,10 @@ static void l2cap_retransmit_one_frame(struct l2cap_chan *chan, u16 tx_seq)
__put_control(chan, control, tx_skb->data + L2CAP_HDR_SIZE);
if (chan->fcs == L2CAP_FCS_CRC16) {
- fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2);
- put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2);
+ fcs = crc16(0, (u8 *)tx_skb->data,
+ tx_skb->len - L2CAP_FCS_SIZE);
+ put_unaligned_le16(fcs,
+ tx_skb->data + tx_skb->len - L2CAP_FCS_SIZE);
}
l2cap_do_send(chan, tx_skb);
@@ -1381,8 +1385,10 @@ static int l2cap_ertm_send(struct l2cap_chan *chan)
__put_control(chan, control, tx_skb->data + L2CAP_HDR_SIZE);
if (chan->fcs == L2CAP_FCS_CRC16) {
- fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2);
- put_unaligned_le16(fcs, skb->data + tx_skb->len - 2);
+ fcs = crc16(0, (u8 *)skb->data,
+ tx_skb->len - L2CAP_FCS_SIZE);
+ put_unaligned_le16(fcs, skb->data +
+ tx_skb->len - L2CAP_FCS_SIZE);
}
l2cap_do_send(chan, tx_skb);
@@ -1565,10 +1571,10 @@ static struct sk_buff *l2cap_create_iframe_pdu(struct l2cap_chan *chan, struct m
hlen = L2CAP_ENHANCED_HDR_SIZE;
if (sdulen)
- hlen += 2;
+ hlen += L2CAP_SDULEN_SIZE;
if (chan->fcs == L2CAP_FCS_CRC16)
- hlen += 2;
+ hlen += L2CAP_FCS_SIZE;
count = min_t(unsigned int, (conn->mtu - hlen), len);
skb = bt_skb_send_alloc(sk, count + hlen,
@@ -1584,7 +1590,7 @@ static struct sk_buff *l2cap_create_iframe_pdu(struct l2cap_chan *chan, struct m
__put_control_put(chan, control, skb);
if (sdulen)
- put_unaligned_le16(sdulen, skb_put(skb, 2));
+ put_unaligned_le16(sdulen, skb_put(skb, L2CAP_SDULEN_SIZE));
err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb);
if (unlikely(err < 0)) {
@@ -1593,7 +1599,7 @@ static struct sk_buff *l2cap_create_iframe_pdu(struct l2cap_chan *chan, struct m
}
if (chan->fcs == L2CAP_FCS_CRC16)
- put_unaligned_le16(0, skb_put(skb, 2));
+ put_unaligned_le16(0, skb_put(skb, L2CAP_FCS_SIZE));
bt_cb(skb)->retries = 0;
return skb;
@@ -3301,7 +3307,7 @@ static int l2cap_check_fcs(struct l2cap_chan *chan, struct sk_buff *skb)
hdr_size = L2CAP_ENHANCED_HDR_SIZE;
if (chan->fcs == L2CAP_FCS_CRC16) {
- skb_trim(skb, skb->len - 2);
+ skb_trim(skb, skb->len - L2CAP_FCS_SIZE);
rcv_fcs = get_unaligned_le16(skb->data + skb->len);
our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size);
@@ -3411,7 +3417,7 @@ static int l2cap_reassemble_sdu(struct l2cap_chan *chan, struct sk_buff *skb, u3
break;
chan->sdu_len = get_unaligned_le16(skb->data);
- skb_pull(skb, 2);
+ skb_pull(skb, L2CAP_SDULEN_SIZE);
if (chan->sdu_len > chan->imtu) {
err = -EMSGSIZE;
@@ -3908,7 +3914,7 @@ static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb)
len -= L2CAP_SDULEN_SIZE;
if (chan->fcs == L2CAP_FCS_CRC16)
- len -= 2;
+ len -= L2CAP_FCS_SIZE;
if (len > chan->mps) {
l2cap_send_disconn_req(chan->conn, chan, ECONNRESET);
@@ -4008,7 +4014,7 @@ static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk
len -= L2CAP_SDULEN_SIZE;
if (chan->fcs == L2CAP_FCS_CRC16)
- len -= 2;
+ len -= L2CAP_FCS_SIZE;
if (len > chan->mps || len < 0 || __is_sframe(chan, control))
goto drop;
--
1.7.4.1
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