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Bluetooth: Add support for returning the encryption key size

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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@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
This commit is contained in:
Vinicius Costa Gomes 2011-07-08 18:31:46 -03:00 committed by Gustavo F. Padovan
parent 726b4ffcaa
commit 8f36011924
2 changed files with 5 additions and 0 deletions
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1
include/net/bluetooth/bluetooth.h
View File

@ -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

4
net/bluetooth/l2cap_sock.c
View File

@ -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;