This will be useful when userspace wants to restrict some kinds of
operations based on the length of the key size used to encrypt the
link.
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@xxxxxxxxxxxxx>
---
include/net/bluetooth/bluetooth.h | 1 +
net/bluetooth/l2cap_sock.c | 4 ++++
2 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h
index acf186d..28ae91a 100644
--- a/include/net/bluetooth/bluetooth.h
+++ b/include/net/bluetooth/bluetooth.h
@@ -56,6 +56,7 @@
#define BT_SECURITY 4
struct bt_security {
__u8 level;
+ __u8 key_size;
};
#define BT_SECURITY_SDP 0
#define BT_SECURITY_LOW 1
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index b5796fd..7d143f4 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -492,8 +492,12 @@ static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, ch
break;
}
+ memset(&sec, 0, sizeof(sec));
sec.level = l2cap_pi(sk)->sec_level;
+ if (sk->sk_state == BT_CONNECTED)
+ sec.key_size = l2cap_pi(sk)->conn->hcon->enc_key_size;
+
len = min_t(unsigned int, len, sizeof(sec));
if (copy_to_user(optval, (char *) &sec, len))
err = -EFAULT;
--
1.7.4.3
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