Bluetooth: Handle LE L2CAP signalling in its own function

The LE L2CAP signalling channel follows its own rules and will continue
to evolve independently from the BR/EDR signalling channel. Therefore,
it makes sense to have a clear split from BR/EDR by having a dedicated
function for handling LE signalling commands.

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 a76d1ac0321b40f48f6de231f31ff14e2af363df..1adda11b45f92970cb1f734ccf907920f9df769d 100644 (file)
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -5255,6 +5255,51 @@ static inline int l2cap_le_sig_cmd(struct l2cap_conn *conn,
        }
 }
 
+static inline void l2cap_le_sig_channel(struct l2cap_conn *conn,
+                                       struct sk_buff *skb)
+{
+       u8 *data = skb->data;
+       int len = skb->len;
+       struct l2cap_cmd_hdr cmd;
+       int err;
+
+       l2cap_raw_recv(conn, skb);
+
+       while (len >= L2CAP_CMD_HDR_SIZE) {
+               u16 cmd_len;
+               memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE);
+               data += L2CAP_CMD_HDR_SIZE;
+               len  -= L2CAP_CMD_HDR_SIZE;
+
+               cmd_len = le16_to_cpu(cmd.len);
+
+               BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len,
+                      cmd.ident);
+
+               if (cmd_len > len || !cmd.ident) {
+                       BT_DBG("corrupted command");
+                       break;
+               }
+
+               err = l2cap_le_sig_cmd(conn, &cmd, data);
+               if (err) {
+                       struct l2cap_cmd_rej_unk rej;
+
+                       BT_ERR("Wrong link type (%d)", err);
+
+                       /* FIXME: Map err to a valid reason */
+                       rej.reason = __constant_cpu_to_le16(L2CAP_REJ_NOT_UNDERSTOOD);
+                       l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ,
+                                      sizeof(rej), &rej);
+               }
+
+               data += cmd_len;
+               len  -= cmd_len;
+       }
+
+       kfree_skb(skb);
+}
+
 static inline void l2cap_sig_channel(struct l2cap_conn *conn,
                                     struct sk_buff *skb)
 {
@@ -5281,11 +5326,7 @@ static inline void l2cap_sig_channel(struct l2cap_conn *conn,
                        break;
                }
 
-               if (conn->hcon->type == LE_LINK)
-                       err = l2cap_le_sig_cmd(conn, &cmd, data);
-               else
-                       err = l2cap_bredr_sig_cmd(conn, &cmd, cmd_len, data);
-
+               err = l2cap_bredr_sig_cmd(conn, &cmd, cmd_len, data);
                if (err) {
                        struct l2cap_cmd_rej_unk rej;
 
@@ -6358,6 +6399,8 @@ static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb)
 
        switch (cid) {
        case L2CAP_CID_LE_SIGNALING:
+               l2cap_le_sig_channel(conn, skb);
+               break;
        case L2CAP_CID_SIGNALING:
                l2cap_sig_channel(conn, skb);
                break;