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Bluetooth: ISO: Notify user space about failed bis connections
Some use cases require the user to be informed if BIG synchronization fails. This commit makes it so that even if the BIG sync established event arrives with error status, a new hconn is added for each BIS, and the iso layer is notified about the failed connections. Unsuccesful bis connections will be marked using the HCI_CONN_BIG_SYNC_FAILED flag. From the iso layer, the POLLERR event is triggered on the newly allocated bis sockets, before adding them to the accept list of the parent socket. From user space, a new fd for each failed bis connection will be obtained by calling accept. The user should check for the POLLERR event on the new socket, to determine if the connection was successful or not. The HCI_CONN_BIG_SYNC flag has been added to mark whether the BIG sync has been successfully established. This flag is checked at bis cleanup, so the HCI LE BIG Terminate Sync command is only issued if needed. The BT_SK_BIG_SYNC flag indicates if BIG create sync has been called for a listening socket, to avoid issuing the command everytime a BIGInfo advertising report is received. Signed-off-by: Iulia Tanasescu <iulia.tanasescu@nxp.com> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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