l2cu_check_channel_congestion() function

* Function l2cu_release_ccb * Description This function releases a Channel Control Block. The timer * is stopped, any attached buffers freed, and the CCB is removed * from the link control block. * Returns void

* Function l2c_csm_execute * Description This function executes the state machine. * Returns void

* Function l2c_link_check_send_pkts * Description This function is called to check if it can send packets * to the Host Controller. It may be passed the address of * a packet to send. * Returns void

* Function l2c_fcr_send_S_frame * Description This function formats and sends an S-frame for transmission. * Returns -

* Function l2cu_send_peer_disc_req * Description Build and send an L2CAP "disconnect request" message * to the peer. * Returns void

* Function l2cu_disconnect_chnl * Description Disconnect a channel. Typically, this is due to either * receiving a bad configuration, bad packet or max_retries expiring.

* Function l2cu_send_peer_connect_rsp * Description Build and send an L2CAP "connection response" message * to the peer. * Returns void

* Function l2c_fcr_start_timer * Description This function starts the (monitor or retransmission) timer. * Returns -

* Function l2cu_send_peer_config_rsp * Description Build and send an L2CAP "configuration response" message * to the peer. * Returns void

* Function l2cu_set_acl_hci_header * Description Set HCI handle for ACL packet * Returns None

* Function l2c_fcr_stop_timer * Description This function stops the (monitor or transmission) timer. * Returns -

* Function l2c_fcr_is_flow_controlled * Description This function checks if the CCB is flow controlled by peer. * Returns The control word

* Configuration negotiation functions * The following functions are used in negotiating channel modes during * configuration * Function l2c_fcr_chk_chan_modes * Description Validates and adjusts if necessary, the FCR options * based on remote EXT features. * Note: This assumes peer EXT Features have been received. * Basic mode is used if FCR Options have not been received * Returns UINT8 - nonzero if can continue, '0' if no compatible channels

* Function retransmit_i_frames * Description This function retransmits i-frames awaiting acks. * Returns BOOLEAN - TRUE if retransmitted

* Function l2cu_send_peer_connect_req * Description Build and send an L2CAP "connection request" message * to the peer. * Returns void

* Function l2cu_send_peer_config_req * Description Build and send an L2CAP "configuration request" message * to the peer. * Returns void

* Function l2c_enqueue_peer_data * Description Enqueues data destined for the peer in the ccb. Handles * FCR segmentation and checks for congestion. * Returns void

* Function l2cu_process_our_cfg_req * Description This function is called when we send a "config request" * message. It extracts the configuration of interest and saves * it in the CCB. * Returns void

* Function l2cu_enqueue_ccb * Description queue CCB by priority. The first CCB is highest priority and * is served at first. The CCB is queued to an LLCB or an LCB. * Returns None

* Function l2cu_dequeue_ccb * Description dequeue CCB from a queue * Returns -

* Function l2cu_send_peer_ble_credit_based_conn_res * Description Build and send an L2CAP "Credit based connection res" message * to the peer. This function is called in case of success. * Returns void

* Function l2c_fcr_proc_pdu * Description This function is the entry point for processing of a * received PDU when in flow control and/or retransmission modes. * Returns -

* Function l2c_fcr_get_next_xmit_sdu_seg * Description Get the next SDU segment to transmit. * Returns pointer to buffer with segment or NULL

* Function l2c_fcr_adj_monitor_retran_timeout * Description Overrides monitor/retrans timer value based on controller * Returns None

BLE_INCLUDED == TRUE * Function l2cu_process_peer_cfg_req * Description This function is called when the peer sends us a "config request" * message. It extracts the configuration of interest and saves * it in the CCB. * Note: Negotiation of the FCR channel type is handled internally, * all others are passed to the upper layer. * Returns UINT8 - L2CAP_PEER_CFG_OK if passed to upper layer, * L2CAP_PEER_CFG_UNACCEPTABLE if automatically responded to * because parameters are unnacceptable from a specification * point of view. * L2CAP_PEER_CFG_DISCONNECT if no compatible channel modes * between the two devices, and shall be closed.

* Function do_sar_reassembly * Description Process SAR bits and re-assemble frame * Returns TRUE if all OK, else FALSE

* Function process_i_frame * Description Process an I frame * Returns -

* Function prepare_I_frame * Description This function sets the FCR variables in an I-frame that is * about to be sent to HCI for transmission. This may be the * first time the I-frame is sent, or a retransmission * Returns -

* Function l2cu_change_pri_ccb * Description * Returns -

* Function l2cu_send_peer_config_rej * Description Build and send an L2CAP "configuration reject" message * to the peer. * Returns void

* Function l2cu_send_peer_ble_credit_based_conn_req * Description Build and send a BLE packet to establish LE connection oriented * L2CAP channel. * Returns void

* Function l2cu_send_peer_ble_flow_control_credit * Description Build and send a BLE packet to give credits to peer device * for LE connection oriented L2CAP channel. * Returns void

* Function l2cu_send_peer_ble_credit_based_conn_req * Description Build and send a BLE packet to disconnect LE connection oriented * L2CAP channel. * Returns void

* Function l2cu_adjust_out_mps * Description Sets our MPS based on current controller capabilities * Returns void

* Function l2c_fcr_cleanup * Description This function cleans up the variable used for flow-control/retrans. * Returns -

* Function l2c_fcr_proc_tout * Description Handle a timeout. We should be in error recovery state. * Returns -

* Function l2c_fcr_proc_ack_tout * Description Send RR/RNR if we have not acked I frame * Returns -

* Function l2c_fcr_adj_our_req_options * Description Validates and sets up the FCR options passed in from * L2CA_ConfigReq based on remote device's features. * Returns TRUE if no errors, Otherwise FALSE

* Function l2c_fcr_adj_our_rsp_options * Description Overrides any neccesary FCR options passed in from * L2CA_ConfigRsp based on our FCR options. * Only makes adjustments if channel is in ERTM mode. * Returns None

* Function l2c_fcr_renegotiate_chan * Description Called upon unsuccessful peer response to config request. * If the error is because of the channel mode, it will try * to resend using another supported optional channel. * Returns TRUE if resent configuration, False if channel matches or * cannot match.

* Function l2c_fcr_process_peer_cfg_req * Description This function is called to process the FCR options passed * in the peer's configuration request. * Returns UINT8 - L2CAP_PEER_CFG_OK, L2CAP_PEER_CFG_UNACCEPTABLE, * or L2CAP_PEER_CFG_DISCONNECT.

* Function l2c_fcr_free_timer * Description This function releases the (monitor or transmission) timer. * Returns -

* Function l2cble_send_peer_disc_req * Description This function sends disconnect request * to the peer LE device * Returns void

* Function l2cu_process_peer_cfg_rsp * Description This function is called when the peer sends us a "config response" * message. It extracts the configuration of interest and saves * it in the CCB. * Returns void

* Function l2cu_process_our_cfg_rsp * Description This function is called when we send the peer a "config response" * message. It extracts the configuration of interest and saves * it in the CCB. * Returns void

* Function l2c_csm_w4_l2ca_disconnect_rsp * Description This function handles events when the channel is in * CST_W4_L2CA_DISCONNECT_RSP state. * Returns void

* Function l2c_csm_term_w4_sec_comp * Description This function handles events when the channel is in * CST_TERM_W4_SEC_COMP state. * Returns void

* Function l2c_csm_config * Description This function handles events when the channel is in * CONFIG state. * Returns void

* Function l2c_csm_w4_l2ca_connect_rsp * Description This function handles events when the channel is in * CST_W4_L2CA_CONNECT_RSP state. * Returns void

* Function l2c_csm_w4_l2cap_connect_rsp * Description This function handles events when the channel is in * CST_W4_L2CAP_CONNECT_RSP state. * Returns void

* Function l2c_csm_closed * Description This function handles events when the channel is in * CLOSED state. This state exists only when the link is * being initially established. * Returns void

* Function l2c_csm_orig_w4_sec_comp * Description This function handles events when the channel is in * CST_ORIG_W4_SEC_COMP state. * Returns void

* Function l2c_csm_open * Description This function handles events when the channel is in * OPEN state. * Returns void

* Function l2c_csm_w4_l2cap_disconnect_rsp * Description This function handles events when the channel is in * CST_W4_L2CAP_DISCONNECT_RSP state. * Returns void

* Function process_reqseq * Description Handle receive sequence number * Returns -

* Function process_s_frame * Description Process an S frame * Returns -

* Function process_stream_frame * Description This function processes frames in streaming mode * Returns -

* Function l2cble_credit_based_conn_req * Description This function sends LE Credit Based Connection Request for * LE connection oriented channels. * Returns void

* Function l2cble_credit_based_conn_res * Description This function sends LE Credit Based Connection Response for * LE connection oriented channels. * Returns void

* Function l2cble_send_flow_control_credit * Description This function sends flow control credits for * LE connection oriented channels. * Returns void