Bluetooth: Fix L2CAP command reject reason
There are several possible reason codes that can be sent in the command
reject L2CAP packet. Before this patch the code has used a hard-coded
single response code ("command not understood"). This patch adds a
helper function to map the return value of an L2CAP handler function to
the correct command reject reason.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 31bf812..2ff35a2 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -5294,6 +5294,20 @@
}
}
+static __le16 l2cap_err_to_reason(int err)
+{
+ switch (err) {
+ case -EBADSLT:
+ return __constant_cpu_to_le16(L2CAP_REJ_INVALID_CID);
+ case -EMSGSIZE:
+ return __constant_cpu_to_le16(L2CAP_REJ_MTU_EXCEEDED);
+ case -EINVAL:
+ case -EPROTO:
+ default:
+ return __constant_cpu_to_le16(L2CAP_REJ_NOT_UNDERSTOOD);
+ }
+}
+
static inline void l2cap_le_sig_channel(struct l2cap_conn *conn,
struct sk_buff *skb)
{
@@ -5326,8 +5340,7 @@
BT_ERR("Wrong link type (%d)", err);
- /* FIXME: Map err to a valid reason */
- rej.reason = __constant_cpu_to_le16(L2CAP_REJ_NOT_UNDERSTOOD);
+ rej.reason = l2cap_err_to_reason(err);
l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ,
sizeof(rej), &rej);
}
@@ -5371,8 +5384,7 @@
BT_ERR("Wrong link type (%d)", err);
- /* FIXME: Map err to a valid reason */
- rej.reason = __constant_cpu_to_le16(L2CAP_REJ_NOT_UNDERSTOOD);
+ rej.reason = l2cap_err_to_reason(err);
l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ,
sizeof(rej), &rej);
}