Bluetooth: Add support for deferring RFCOMM connection setup

In order to decide if listening RFCOMM sockets should be accept()ed
the BD_ADDR of the remote device needs to be known. This patch adds
a socket option which defines a timeout for deferring the actual
connection setup.

The connection setup is done after reading from the socket for the
first time. Until then writing to the socket returns ENOTCONN.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/include/net/bluetooth/rfcomm.h b/include/net/bluetooth/rfcomm.h
index 4dc8d92a4638..71b45f459687 100644
--- a/include/net/bluetooth/rfcomm.h
+++ b/include/net/bluetooth/rfcomm.h
@@ -185,6 +185,7 @@ struct rfcomm_dlc {
         u8            out;
 
         u32           link_mode;
+        u32           defer_setup;
 
         uint          mtu;
         uint          cfc;
@@ -202,10 +203,11 @@ struct rfcomm_dlc {
 #define RFCOMM_RX_THROTTLED 0
 #define RFCOMM_TX_THROTTLED 1
 #define RFCOMM_TIMED_OUT    2
-#define RFCOMM_MSC_PENDING  3 
+#define RFCOMM_MSC_PENDING  3
 #define RFCOMM_AUTH_PENDING 4
 #define RFCOMM_AUTH_ACCEPT  5
 #define RFCOMM_AUTH_REJECT  6
+#define RFCOMM_DEFER_SETUP  7
 
 /* Scheduling flags and events */
 #define RFCOMM_SCHED_STATE  0
@@ -239,6 +241,7 @@ int  rfcomm_dlc_close(struct rfcomm_dlc *d, int reason);
 int  rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb);
 int  rfcomm_dlc_set_modem_status(struct rfcomm_dlc *d, u8 v24_sig);
 int  rfcomm_dlc_get_modem_status(struct rfcomm_dlc *d, u8 *v24_sig);
+void rfcomm_dlc_accept(struct rfcomm_dlc *d);
 
 #define rfcomm_dlc_lock(d)     spin_lock(&d->lock)
 #define rfcomm_dlc_unlock(d)   spin_unlock(&d->lock)
@@ -333,7 +336,6 @@ struct rfcomm_dev_req {
         bdaddr_t src;
         bdaddr_t dst;
         u8       channel;
-        
 };
 
 struct rfcomm_dev_info {