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authorIdo Yariv <ido@wizery.com>2012-04-20 15:46:07 -0300
committerGustavo Padovan <gustavo@padovan.org>2012-05-09 01:40:41 -0300
commitc22876814ee9cc72f84996b78203b5530c61bee8 (patch)
tree1dca2dc1271442b9b81ae2389eb644352c2c2f95
parentd8ce9395252fa9a264c04e7ab9949f4f7ec96f5b (diff)
Bluetooth: Search global l2cap channels by src/dst addresses
The cid or psm and the source address might not be enough to uniquely identify a global channel, especially when the source address is our own. For instance, when trying to communicate with two LE devices in master mode, data received from the both devices is sent to the same socket. Fix this by taking the destination address into account when choosing the socket. Signed-off-by: Ido Yariv <ido@wizery.com> Signed-off-by: Arik Nemtsov <arik@wizery.com> Tested-by: João Paulo Rechi Vita <jprvita@openbossa.org> Signed-off-by: Gustavo Padovan <gustavo@padovan.org>
-rw-r--r--net/bluetooth/l2cap_core.c43
1 files changed, 31 insertions, 12 deletions
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index ce93dcf0c2db..cc96e0db284d 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -1066,11 +1066,12 @@ static void l2cap_conn_start(struct l2cap_conn *conn)
mutex_unlock(&conn->chan_lock);
}
-/* Find socket with cid and source bdaddr.
+/* Find socket with cid and source/destination bdaddr.
* Returns closest match, locked.
*/
static struct l2cap_chan *l2cap_global_chan_by_scid(int state, u16 cid,
- bdaddr_t *src)
+ bdaddr_t *src,
+ bdaddr_t *dst)
{
struct l2cap_chan *c, *c1 = NULL;
@@ -1083,14 +1084,22 @@ static struct l2cap_chan *l2cap_global_chan_by_scid(int state, u16 cid,
continue;
if (c->scid == cid) {
+ int src_match, dst_match;
+ int src_any, dst_any;
+
/* Exact match. */
- if (!bacmp(&bt_sk(sk)->src, src)) {
+ src_match = !bacmp(&bt_sk(sk)->src, src);
+ dst_match = !bacmp(&bt_sk(sk)->dst, dst);
+ if (src_match && dst_match) {
read_unlock(&chan_list_lock);
return c;
}
/* Closest match */
- if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY))
+ src_any = !bacmp(&bt_sk(sk)->src, BDADDR_ANY);
+ dst_any = !bacmp(&bt_sk(sk)->dst, BDADDR_ANY);
+ if ((src_match && dst_any) || (src_any && dst_match) ||
+ (src_any && dst_any))
c1 = c;
}
}
@@ -1109,7 +1118,7 @@ static void l2cap_le_conn_ready(struct l2cap_conn *conn)
/* Check if we have socket listening on cid */
pchan = l2cap_global_chan_by_scid(BT_LISTEN, L2CAP_CID_LE_DATA,
- conn->src);
+ conn->src, conn->dst);
if (!pchan)
return;
@@ -1337,10 +1346,12 @@ static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status)
/* ---- Socket interface ---- */
-/* Find socket with psm and source bdaddr.
+/* Find socket with psm and source / destination bdaddr.
* Returns closest match.
*/
-static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm, bdaddr_t *src)
+static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm,
+ bdaddr_t *src,
+ bdaddr_t *dst)
{
struct l2cap_chan *c, *c1 = NULL;
@@ -1353,14 +1364,22 @@ static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm, bdaddr
continue;
if (c->psm == psm) {
+ int src_match, dst_match;
+ int src_any, dst_any;
+
/* Exact match. */
- if (!bacmp(&bt_sk(sk)->src, src)) {
+ src_match = !bacmp(&bt_sk(sk)->src, src);
+ dst_match = !bacmp(&bt_sk(sk)->dst, dst);
+ if (src_match && dst_match) {
read_unlock(&chan_list_lock);
return c;
}
/* Closest match */
- if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY))
+ src_any = !bacmp(&bt_sk(sk)->src, BDADDR_ANY);
+ dst_any = !bacmp(&bt_sk(sk)->dst, BDADDR_ANY);
+ if ((src_match && dst_any) || (src_any && dst_match) ||
+ (src_any && dst_any))
c1 = c;
}
}
@@ -2887,7 +2906,7 @@ static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hd
BT_DBG("psm 0x%2.2x scid 0x%4.4x", __le16_to_cpu(psm), scid);
/* Check if we have socket listening on psm */
- pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, conn->src);
+ pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, conn->src, conn->dst);
if (!pchan) {
result = L2CAP_CR_BAD_PSM;
goto sendresp;
@@ -4627,7 +4646,7 @@ static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, str
{
struct l2cap_chan *chan;
- chan = l2cap_global_chan_by_psm(0, psm, conn->src);
+ chan = l2cap_global_chan_by_psm(0, psm, conn->src, conn->dst);
if (!chan)
goto drop;
@@ -4653,7 +4672,7 @@ static inline int l2cap_att_channel(struct l2cap_conn *conn, u16 cid,
{
struct l2cap_chan *chan;
- chan = l2cap_global_chan_by_scid(0, cid, conn->src);
+ chan = l2cap_global_chan_by_scid(0, cid, conn->src, conn->dst);
if (!chan)
goto drop;