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Bluetooth: Modified hci_recv_fragment() to use hci_reassembly helper

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Modified packet based reassembly function hci_recv_fragment() to use
hci_reassembly()

Signed-off-by: Suraj Sumangala <suraj@atheros.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Suraj Sumangala 2010-07-14 13:02:18 +05:30 committed by Marcel Holtmann
parent 33e882a5f2
commit f39a3c0640
1 changed files with 11 additions and 74 deletions
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85
net/bluetooth/hci_core.c
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@ -1142,87 +1142,24 @@ static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
return remain;
}
/* Receive packet type fragment */
#define __reassembly(hdev, type) ((hdev)->reassembly[(type) - 1])
int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
{
int rem = 0;
if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
return -EILSEQ;
while (count) {
struct sk_buff *skb = __reassembly(hdev, type);
struct { int expect; } *scb;
int len = 0;
do {
rem = hci_reassembly(hdev, type, data, count,
type - 1, GFP_ATOMIC);
if (rem < 0)
return rem;
if (!skb) {
/* Start of the frame */
data += (count - rem);
count = rem;
} while (count);
switch (type) {
case HCI_EVENT_PKT:
if (count >= HCI_EVENT_HDR_SIZE) {
struct hci_event_hdr *h = data;
len = HCI_EVENT_HDR_SIZE + h->plen;
} else
return -EILSEQ;
break;
case HCI_ACLDATA_PKT:
if (count >= HCI_ACL_HDR_SIZE) {
struct hci_acl_hdr *h = data;
len = HCI_ACL_HDR_SIZE + __le16_to_cpu(h->dlen);
} else
return -EILSEQ;
break;
case HCI_SCODATA_PKT:
if (count >= HCI_SCO_HDR_SIZE) {
struct hci_sco_hdr *h = data;
len = HCI_SCO_HDR_SIZE + h->dlen;
} else
return -EILSEQ;
break;
}
skb = bt_skb_alloc(len, GFP_ATOMIC);
if (!skb) {
BT_ERR("%s no memory for packet", hdev->name);
return -ENOMEM;
}
skb->dev = (void *) hdev;
bt_cb(skb)->pkt_type = type;
__reassembly(hdev, type) = skb;
scb = (void *) skb->cb;
scb->expect = len;
} else {
/* Continuation */
scb = (void *) skb->cb;
len = scb->expect;
}
len = min(len, count);
memcpy(skb_put(skb, len), data, len);
scb->expect -= len;
if (scb->expect == 0) {
/* Complete frame */
__reassembly(hdev, type) = NULL;
bt_cb(skb)->pkt_type = type;
hci_recv_frame(skb);
}
count -= len; data += len;
}
return 0;
return rem;
}
EXPORT_SYMBOL(hci_recv_fragment);