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Commit 8f360119 authored by Vinicius Costa Gomes's avatar Vinicius Costa Gomes Committed by Gustavo Padovan
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Bluetooth: Add support for returning the encryption key size 



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: default avatarVinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: default avatarGustavo F. Padovan <padovan@profusion.mobi>
parent 726b4ffc

include/net/bluetooth/bluetooth.h

+1 −0
Original line number Diff line number Diff line
@@ -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

net/bluetooth/l2cap_sock.c

+4 −0
Original line number Diff line number Diff line
@@ -422,8 +422,12 @@ static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, ch 
			break;

		}



		memset(&sec, 0, sizeof(sec));

		sec.level = chan->sec_level;



		if (sk->sk_state == BT_CONNECTED)

			sec.key_size = chan->conn->hcon->enc_key_size;



		len = min_t(unsigned int, len, sizeof(sec));

		if (copy_to_user(optval, (char *) &sec, len))

			err = -EFAULT;