The SCO sockets are only identified by its address. So only allow one
SCO socket in listening state per address or BDADDR_ANY.
Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
---
net/bluetooth/sco.c | 29 ++++++++++++++++++++++-------
1 files changed, 22 insertions(+), 7 deletions(-)
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index 8b2548c..b1265fb 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -274,17 +274,20 @@ drop:
}
/* -------- Socket interface ---------- */
-static struct sock *__sco_get_sock_by_addr(bdaddr_t *ba)
+static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba)
{
- struct sock *sk;
struct hlist_node *node;
+ struct sock *sk;
+
+ sk_for_each(sk, node, &sco_sk_list.head) {
+ if (sk->sk_state != BT_LISTEN)
+ continue;
- sk_for_each(sk, node, &sco_sk_list.head)
if (!bacmp(&bt_sk(sk)->src, ba))
- goto found;
- sk = NULL;
-found:
- return sk;
+ return sk;
+ }
+
+ return NULL;
}
/* Find socket listening on source bdaddr.
@@ -530,6 +533,7 @@ done:
static int sco_sock_listen(struct socket *sock, int backlog)
{
struct sock *sk = sock->sk;
+ bdaddr_t *src = &bt_sk(sk)->src;
int err = 0;
BT_DBG("sk %p backlog %d", sk, backlog);
@@ -546,10 +550,21 @@ static int sco_sock_listen(struct socket *sock, int backlog)
goto done;
}
+ write_lock(&sco_sk_list.lock);
+
+ if (__sco_get_sock_listen_by_addr(src)) {
+ err = -EADDRINUSE;
+ goto unlock;
+ }
+
sk->sk_max_ack_backlog = backlog;
sk->sk_ack_backlog = 0;
+
sk->sk_state = BT_LISTEN;
+unlock:
+ write_unlock(&sco_sk_list.lock);
+
done:
release_sock(sk);
return err;
--
1.7.7.6
--
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