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authorGrzegorz Kolodziejczyk <grzegorz.kolodziejczyk@tieto.com>2015-04-03 10:14:54 (GMT)
committerMarcel Holtmann <marcel@holtmann.org>2015-04-03 21:21:34 (GMT)
commitbf8b9a9cb77b14e37a8bc925be5db7bfd54d69a8 (patch)
tree5900f4ea20c1ef3a10c9cf30dccd9f3baa366e36
parent0477e2e868ceead7fd96218e1a062e01631ce717 (diff)
downloadlinux-bf8b9a9cb77b14e37a8bc925be5db7bfd54d69a8.tar.xz
Bluetooth: bnep: Add support to extended headers of control frames
Handling extended headers of control frames is required BNEP functionality. This patch refractor bnep rx frame handling function. Extended header for control frames shouldn't be omitted as it was previously done. Every control frame should be checked if it contains extended header and then every extension should be parsed separately. Signed-off-by: Grzegorz Kolodziejczyk <grzegorz.kolodziejczyk@tieto.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
-rw-r--r--net/bluetooth/bnep/core.c46
1 files changed, 36 insertions, 10 deletions
diff --git a/net/bluetooth/bnep/core.c b/net/bluetooth/bnep/core.c
index 5cf5fbd..0ee6f6d 100644
--- a/net/bluetooth/bnep/core.c
+++ b/net/bluetooth/bnep/core.c
@@ -292,29 +292,55 @@ static int bnep_rx_frame(struct bnep_session *s, struct sk_buff *skb)
{
struct net_device *dev = s->dev;
struct sk_buff *nskb;
- u8 type;
+ u8 type, ctrl_type;
dev->stats.rx_bytes += skb->len;
type = *(u8 *) skb->data;
skb_pull(skb, 1);
+ ctrl_type = *(u8 *)skb->data;
if ((type & BNEP_TYPE_MASK) >= sizeof(__bnep_rx_hlen))
goto badframe;
if ((type & BNEP_TYPE_MASK) == BNEP_CONTROL) {
- bnep_rx_control(s, skb->data, skb->len);
- kfree_skb(skb);
- return 0;
- }
+ if (bnep_rx_control(s, skb->data, skb->len) < 0) {
+ dev->stats.tx_errors++;
+ kfree_skb(skb);
+ return 0;
+ }
- skb_reset_mac_header(skb);
+ if (!(type & BNEP_EXT_HEADER)) {
+ kfree_skb(skb);
+ return 0;
+ }
- /* Verify and pull out header */
- if (!skb_pull(skb, __bnep_rx_hlen[type & BNEP_TYPE_MASK]))
- goto badframe;
+ /* Verify and pull ctrl message since it's already processed */
+ switch (ctrl_type) {
+ case BNEP_SETUP_CONN_REQ:
+ /* Pull: ctrl type (1 b), len (1 b), data (len bytes) */
+ if (!skb_pull(skb, 2 + *(u8 *)(skb->data + 1) * 2))
+ goto badframe;
+ break;
+ case BNEP_FILTER_MULTI_ADDR_SET:
+ case BNEP_FILTER_NET_TYPE_SET:
+ /* Pull: ctrl type (1 b), len (2 b), data (len bytes) */
+ if (!skb_pull(skb, 3 + *(u16 *)(skb->data + 1) * 2))
+ goto badframe;
+ break;
+ default:
+ kfree_skb(skb);
+ return 0;
+ }
+ } else {
+ skb_reset_mac_header(skb);
- s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2));
+ /* Verify and pull out header */
+ if (!skb_pull(skb, __bnep_rx_hlen[type & BNEP_TYPE_MASK]))
+ goto badframe;
+
+ s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2));
+ }
if (type & BNEP_EXT_HEADER) {
if (bnep_rx_extension(s, skb) < 0)