diff options
Diffstat (limited to 'softdevice/s113/headers/ble_l2cap.h')
| -rw-r--r-- | softdevice/s113/headers/ble_l2cap.h | 506 |
1 files changed, 506 insertions, 0 deletions
diff --git a/softdevice/s113/headers/ble_l2cap.h b/softdevice/s113/headers/ble_l2cap.h new file mode 100644 index 0000000..edaf664 --- /dev/null +++ b/softdevice/s113/headers/ble_l2cap.h @@ -0,0 +1,506 @@ +/* + * Copyright (c) 2011 - 2018, Nordic Semiconductor ASA + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form, except as embedded into a Nordic + * Semiconductor ASA integrated circuit in a product or a software update for + * such product, must reproduce the above copyright notice, this list of + * conditions and the following disclaimer in the documentation and/or other + * materials provided with the distribution. + * + * 3. Neither the name of Nordic Semiconductor ASA nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * 4. This software, with or without modification, must only be used with a + * Nordic Semiconductor ASA integrated circuit. + * + * 5. Any software provided in binary form under this license must not be reverse + * engineered, decompiled, modified and/or disassembled. + * + * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/** + @addtogroup BLE_L2CAP Logical Link Control and Adaptation Protocol (L2CAP) + @{ + @brief Definitions and prototypes for the L2CAP interface. + */ + +#ifndef BLE_L2CAP_H__ +#define BLE_L2CAP_H__ + +#include <stdint.h> +#include "nrf_svc.h" +#include "nrf_error.h" +#include "ble_ranges.h" +#include "ble_types.h" +#include "ble_err.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/**@addtogroup BLE_L2CAP_TERMINOLOGY Terminology + * @{ + * @details + * + * L2CAP SDU + * - A data unit that the application can send/receive to/from a peer. + * + * L2CAP PDU + * - A data unit that is exchanged between local and remote L2CAP entities. + * It consists of L2CAP protocol control information and payload fields. + * The payload field can contain an L2CAP SDU or a part of an L2CAP SDU. + * + * L2CAP MTU + * - The maximum length of an L2CAP SDU. + * + * L2CAP MPS + * - The maximum length of an L2CAP PDU payload field. + * + * Credits + * - A value indicating the number of L2CAP PDUs that the receiver of the credit can send to the peer. + * @} */ + +/**@addtogroup BLE_L2CAP_ENUMERATIONS Enumerations + * @{ */ + +/**@brief L2CAP API SVC numbers. */ +enum BLE_L2CAP_SVCS +{ + SD_BLE_L2CAP_CH_SETUP = BLE_L2CAP_SVC_BASE + 0, /**< Set up an L2CAP channel. */ + SD_BLE_L2CAP_CH_RELEASE = BLE_L2CAP_SVC_BASE + 1, /**< Release an L2CAP channel. */ + SD_BLE_L2CAP_CH_RX = BLE_L2CAP_SVC_BASE + 2, /**< Receive an SDU on an L2CAP channel. */ + SD_BLE_L2CAP_CH_TX = BLE_L2CAP_SVC_BASE + 3, /**< Transmit an SDU on an L2CAP channel. */ + SD_BLE_L2CAP_CH_FLOW_CONTROL = BLE_L2CAP_SVC_BASE + 4, /**< Advanced SDU reception flow control. */ +}; + +/**@brief L2CAP Event IDs. */ +enum BLE_L2CAP_EVTS +{ + BLE_L2CAP_EVT_CH_SETUP_REQUEST = BLE_L2CAP_EVT_BASE + 0, /**< L2CAP Channel Setup Request event. + \n See @ref ble_l2cap_evt_ch_setup_request_t. */ + BLE_L2CAP_EVT_CH_SETUP_REFUSED = BLE_L2CAP_EVT_BASE + 1, /**< L2CAP Channel Setup Refused event. + \n See @ref ble_l2cap_evt_ch_setup_refused_t. */ + BLE_L2CAP_EVT_CH_SETUP = BLE_L2CAP_EVT_BASE + 2, /**< L2CAP Channel Setup Completed event. + \n See @ref ble_l2cap_evt_ch_setup_t. */ + BLE_L2CAP_EVT_CH_RELEASED = BLE_L2CAP_EVT_BASE + 3, /**< L2CAP Channel Released event. + \n No additional event structure applies. */ + BLE_L2CAP_EVT_CH_SDU_BUF_RELEASED = BLE_L2CAP_EVT_BASE + 4, /**< L2CAP Channel SDU data buffer released event. + \n See @ref ble_l2cap_evt_ch_sdu_buf_released_t. */ + BLE_L2CAP_EVT_CH_CREDIT = BLE_L2CAP_EVT_BASE + 5, /**< L2CAP Channel Credit received. + \n See @ref ble_l2cap_evt_ch_credit_t. */ + BLE_L2CAP_EVT_CH_RX = BLE_L2CAP_EVT_BASE + 6, /**< L2CAP Channel SDU received. + \n See @ref ble_l2cap_evt_ch_rx_t. */ + BLE_L2CAP_EVT_CH_TX = BLE_L2CAP_EVT_BASE + 7, /**< L2CAP Channel SDU transmitted. + \n See @ref ble_l2cap_evt_ch_tx_t. */ +}; + +/** @} */ + +/**@addtogroup BLE_L2CAP_DEFINES Defines + * @{ */ + +/**@brief Maximum number of L2CAP channels per connection. */ +#define BLE_L2CAP_CH_COUNT_MAX (64) + +/**@brief Minimum L2CAP MTU, in bytes. */ +#define BLE_L2CAP_MTU_MIN (23) + +/**@brief Minimum L2CAP MPS, in bytes. */ +#define BLE_L2CAP_MPS_MIN (23) + +/**@brief Invalid CID. */ +#define BLE_L2CAP_CID_INVALID (0x0000) + +/**@brief Default number of credits for @ref sd_ble_l2cap_ch_flow_control. */ +#define BLE_L2CAP_CREDITS_DEFAULT (1) + +/**@defgroup BLE_L2CAP_CH_SETUP_REFUSED_SRCS L2CAP channel setup refused sources + * @{ */ +#define BLE_L2CAP_CH_SETUP_REFUSED_SRC_LOCAL (0x01) /**< Local. */ +#define BLE_L2CAP_CH_SETUP_REFUSED_SRC_REMOTE (0x02) /**< Remote. */ + /** @} */ + + /** @defgroup BLE_L2CAP_CH_STATUS_CODES L2CAP channel status codes + * @{ */ +#define BLE_L2CAP_CH_STATUS_CODE_SUCCESS (0x0000) /**< Success. */ +#define BLE_L2CAP_CH_STATUS_CODE_LE_PSM_NOT_SUPPORTED (0x0002) /**< LE_PSM not supported. */ +#define BLE_L2CAP_CH_STATUS_CODE_NO_RESOURCES (0x0004) /**< No resources available. */ +#define BLE_L2CAP_CH_STATUS_CODE_INSUFF_AUTHENTICATION (0x0005) /**< Insufficient authentication. */ +#define BLE_L2CAP_CH_STATUS_CODE_INSUFF_AUTHORIZATION (0x0006) /**< Insufficient authorization. */ +#define BLE_L2CAP_CH_STATUS_CODE_INSUFF_ENC_KEY_SIZE (0x0007) /**< Insufficient encryption key size. */ +#define BLE_L2CAP_CH_STATUS_CODE_INSUFF_ENC (0x0008) /**< Insufficient encryption. */ +#define BLE_L2CAP_CH_STATUS_CODE_INVALID_SCID (0x0009) /**< Invalid Source CID. */ +#define BLE_L2CAP_CH_STATUS_CODE_SCID_ALLOCATED (0x000A) /**< Source CID already allocated. */ +#define BLE_L2CAP_CH_STATUS_CODE_UNACCEPTABLE_PARAMS (0x000B) /**< Unacceptable parameters. */ +#define BLE_L2CAP_CH_STATUS_CODE_NOT_UNDERSTOOD (0x8000) /**< Command Reject received instead of LE Credit Based Connection Response. */ +#define BLE_L2CAP_CH_STATUS_CODE_TIMEOUT (0xC000) /**< Operation timed out. */ +/** @} */ + +/** @} */ + +/**@addtogroup BLE_L2CAP_STRUCTURES Structures + * @{ */ + +/** + * @brief BLE L2CAP connection configuration parameters, set with @ref sd_ble_cfg_set. + * + * @note These parameters are set per connection, so all L2CAP channels created on this connection + * will have the same parameters. + * + * @retval ::NRF_ERROR_INVALID_PARAM One or more of the following is true: + * - rx_mps is smaller than @ref BLE_L2CAP_MPS_MIN. + * - tx_mps is smaller than @ref BLE_L2CAP_MPS_MIN. + * - ch_count is greater than @ref BLE_L2CAP_CH_COUNT_MAX. + * @retval ::NRF_ERROR_NO_MEM rx_mps or tx_mps is set too high. + */ +typedef struct +{ + uint16_t rx_mps; /**< The maximum L2CAP PDU payload size, in bytes, that L2CAP shall + be able to receive on L2CAP channels on connections with this + configuration. The minimum value is @ref BLE_L2CAP_MPS_MIN. */ + uint16_t tx_mps; /**< The maximum L2CAP PDU payload size, in bytes, that L2CAP shall + be able to transmit on L2CAP channels on connections with this + configuration. The minimum value is @ref BLE_L2CAP_MPS_MIN. */ + uint8_t rx_queue_size; /**< Number of SDU data buffers that can be queued for reception per + L2CAP channel. The minimum value is one. */ + uint8_t tx_queue_size; /**< Number of SDU data buffers that can be queued for transmission + per L2CAP channel. The minimum value is one. */ + uint8_t ch_count; /**< Number of L2CAP channels the application can create per connection + with this configuration. The default value is zero, the maximum + value is @ref BLE_L2CAP_CH_COUNT_MAX. + @note if this parameter is set to zero, all other parameters in + @ref ble_l2cap_conn_cfg_t are ignored. */ +} ble_l2cap_conn_cfg_t; + +/**@brief L2CAP channel RX parameters. */ +typedef struct +{ + uint16_t rx_mtu; /**< The maximum L2CAP SDU size, in bytes, that L2CAP shall be able to + receive on this L2CAP channel. + - Must be equal to or greater than @ref BLE_L2CAP_MTU_MIN. */ + uint16_t rx_mps; /**< The maximum L2CAP PDU payload size, in bytes, that L2CAP shall be + able to receive on this L2CAP channel. + - Must be equal to or greater than @ref BLE_L2CAP_MPS_MIN. + - Must be equal to or less than @ref ble_l2cap_conn_cfg_t::rx_mps. */ + ble_data_t sdu_buf; /**< SDU data buffer for reception. + - If @ref ble_data_t::p_data is non-NULL, initial credits are + issued to the peer. + - If @ref ble_data_t::p_data is NULL, no initial credits are + issued to the peer. */ +} ble_l2cap_ch_rx_params_t; + +/**@brief L2CAP channel setup parameters. */ +typedef struct +{ + ble_l2cap_ch_rx_params_t rx_params; /**< L2CAP channel RX parameters. */ + uint16_t le_psm; /**< LE Protocol/Service Multiplexer. Used when requesting + setup of an L2CAP channel, ignored otherwise. */ + uint16_t status; /**< Status code, see @ref BLE_L2CAP_CH_STATUS_CODES. + Used when replying to a setup request of an L2CAP + channel, ignored otherwise. */ +} ble_l2cap_ch_setup_params_t; + +/**@brief L2CAP channel TX parameters. */ +typedef struct +{ + uint16_t tx_mtu; /**< The maximum L2CAP SDU size, in bytes, that L2CAP is able to + transmit on this L2CAP channel. */ + uint16_t peer_mps; /**< The maximum L2CAP PDU payload size, in bytes, that the peer is + able to receive on this L2CAP channel. */ + uint16_t tx_mps; /**< The maximum L2CAP PDU payload size, in bytes, that L2CAP is able + to transmit on this L2CAP channel. This is effective tx_mps, + selected by the SoftDevice as + MIN( @ref ble_l2cap_ch_tx_params_t::peer_mps, @ref ble_l2cap_conn_cfg_t::tx_mps ) */ + uint16_t credits; /**< Initial credits given by the peer. */ +} ble_l2cap_ch_tx_params_t; + +/**@brief L2CAP Channel Setup Request event. */ +typedef struct +{ + ble_l2cap_ch_tx_params_t tx_params; /**< L2CAP channel TX parameters. */ + uint16_t le_psm; /**< LE Protocol/Service Multiplexer. */ +} ble_l2cap_evt_ch_setup_request_t; + +/**@brief L2CAP Channel Setup Refused event. */ +typedef struct +{ + uint8_t source; /**< Source, see @ref BLE_L2CAP_CH_SETUP_REFUSED_SRCS */ + uint16_t status; /**< Status code, see @ref BLE_L2CAP_CH_STATUS_CODES */ +} ble_l2cap_evt_ch_setup_refused_t; + +/**@brief L2CAP Channel Setup Completed event. */ +typedef struct +{ + ble_l2cap_ch_tx_params_t tx_params; /**< L2CAP channel TX parameters. */ +} ble_l2cap_evt_ch_setup_t; + +/**@brief L2CAP Channel SDU Data Buffer Released event. */ +typedef struct +{ + ble_data_t sdu_buf; /**< Returned reception or transmission SDU data buffer. The SoftDevice + returns SDU data buffers supplied by the application, which have + not yet been returned previously via a @ref BLE_L2CAP_EVT_CH_RX or + @ref BLE_L2CAP_EVT_CH_TX event. */ +} ble_l2cap_evt_ch_sdu_buf_released_t; + +/**@brief L2CAP Channel Credit received event. */ +typedef struct +{ + uint16_t credits; /**< Additional credits given by the peer. */ +} ble_l2cap_evt_ch_credit_t; + +/**@brief L2CAP Channel received SDU event. */ +typedef struct +{ + uint16_t sdu_len; /**< Total SDU length, in bytes. */ + ble_data_t sdu_buf; /**< SDU data buffer. + @note If there is not enough space in the buffer + (sdu_buf.len < sdu_len) then the rest of the SDU will be + silently discarded by the SoftDevice. */ +} ble_l2cap_evt_ch_rx_t; + +/**@brief L2CAP Channel transmitted SDU event. */ +typedef struct +{ + ble_data_t sdu_buf; /**< SDU data buffer. */ +} ble_l2cap_evt_ch_tx_t; + +/**@brief L2CAP event structure. */ +typedef struct +{ + uint16_t conn_handle; /**< Connection Handle on which the event occured. */ + uint16_t local_cid; /**< Local Channel ID of the L2CAP channel, or + @ref BLE_L2CAP_CID_INVALID if not present. */ + union + { + ble_l2cap_evt_ch_setup_request_t ch_setup_request; /**< L2CAP Channel Setup Request Event Parameters. */ + ble_l2cap_evt_ch_setup_refused_t ch_setup_refused; /**< L2CAP Channel Setup Refused Event Parameters. */ + ble_l2cap_evt_ch_setup_t ch_setup; /**< L2CAP Channel Setup Completed Event Parameters. */ + ble_l2cap_evt_ch_sdu_buf_released_t ch_sdu_buf_released;/**< L2CAP Channel SDU Data Buffer Released Event Parameters. */ + ble_l2cap_evt_ch_credit_t credit; /**< L2CAP Channel Credit Received Event Parameters. */ + ble_l2cap_evt_ch_rx_t rx; /**< L2CAP Channel SDU Received Event Parameters. */ + ble_l2cap_evt_ch_tx_t tx; /**< L2CAP Channel SDU Transmitted Event Parameters. */ + } params; /**< Event Parameters. */ +} ble_l2cap_evt_t; + +/** @} */ + +/**@addtogroup BLE_L2CAP_FUNCTIONS Functions + * @{ */ + +/**@brief Set up an L2CAP channel. + * + * @details This function is used to: + * - Request setup of an L2CAP channel: sends an LE Credit Based Connection Request packet to a peer. + * - Reply to a setup request of an L2CAP channel (if called in response to a + * @ref BLE_L2CAP_EVT_CH_SETUP_REQUEST event): sends an LE Credit Based Connection + * Response packet to a peer. + * + * @note A call to this function will require the application to keep the SDU data buffer alive + * until the SDU data buffer is returned in @ref BLE_L2CAP_EVT_CH_RX or + * @ref BLE_L2CAP_EVT_CH_SDU_BUF_RELEASED event. + * + * @events + * @event{@ref BLE_L2CAP_EVT_CH_SETUP, Setup successful.} + * @event{@ref BLE_L2CAP_EVT_CH_SETUP_REFUSED, Setup failed.} + * @endevents + * + * @mscs + * @mmsc{@ref BLE_L2CAP_CH_SETUP_MSC} + * @endmscs + * + * @param[in] conn_handle Connection Handle. + * @param[in,out] p_local_cid Pointer to a uint16_t containing Local Channel ID of the L2CAP channel: + * - As input: @ref BLE_L2CAP_CID_INVALID when requesting setup of an L2CAP + * channel or local_cid provided in the @ref BLE_L2CAP_EVT_CH_SETUP_REQUEST + * event when replying to a setup request of an L2CAP channel. + * - As output: local_cid for this channel. + * @param[in] p_params L2CAP channel parameters. + * + * @retval ::NRF_SUCCESS Successfully queued request or response for transmission. + * @retval ::NRF_ERROR_BUSY The stack is busy, process pending events and retry. + * @retval ::NRF_ERROR_INVALID_ADDR Invalid pointer supplied. + * @retval ::BLE_ERROR_INVALID_CONN_HANDLE Invalid Connection Handle. + * @retval ::NRF_ERROR_INVALID_PARAM Invalid parameter(s) supplied. + * @retval ::NRF_ERROR_INVALID_LENGTH Supplied higher rx_mps than has been configured on this link. + * @retval ::NRF_ERROR_INVALID_STATE Invalid State to perform operation (L2CAP channel already set up). + * @retval ::NRF_ERROR_NOT_FOUND CID not found. + * @retval ::NRF_ERROR_RESOURCES The limit has been reached for available L2CAP channels, + * see @ref ble_l2cap_conn_cfg_t::ch_count. + */ +SVCALL(SD_BLE_L2CAP_CH_SETUP, uint32_t, sd_ble_l2cap_ch_setup(uint16_t conn_handle, uint16_t *p_local_cid, ble_l2cap_ch_setup_params_t const *p_params)); + +/**@brief Release an L2CAP channel. + * + * @details This sends a Disconnection Request packet to a peer. + * + * @events + * @event{@ref BLE_L2CAP_EVT_CH_RELEASED, Release complete.} + * @endevents + * + * @mscs + * @mmsc{@ref BLE_L2CAP_CH_RELEASE_MSC} + * @endmscs + * + * @param[in] conn_handle Connection Handle. + * @param[in] local_cid Local Channel ID of the L2CAP channel. + * + * @retval ::NRF_SUCCESS Successfully queued request for transmission. + * @retval ::BLE_ERROR_INVALID_CONN_HANDLE Invalid Connection Handle. + * @retval ::NRF_ERROR_INVALID_STATE Invalid State to perform operation (Setup or release is + * in progress for the L2CAP channel). + * @retval ::NRF_ERROR_NOT_FOUND CID not found. + */ +SVCALL(SD_BLE_L2CAP_CH_RELEASE, uint32_t, sd_ble_l2cap_ch_release(uint16_t conn_handle, uint16_t local_cid)); + +/**@brief Receive an SDU on an L2CAP channel. + * + * @details This may issue additional credits to the peer using an LE Flow Control Credit packet. + * + * @note A call to this function will require the application to keep the memory pointed by + * @ref ble_data_t::p_data alive until the SDU data buffer is returned in @ref BLE_L2CAP_EVT_CH_RX + * or @ref BLE_L2CAP_EVT_CH_SDU_BUF_RELEASED event. + * + * @note The SoftDevice can queue up to @ref ble_l2cap_conn_cfg_t::rx_queue_size SDU data buffers + * for reception per L2CAP channel. + * + * @events + * @event{@ref BLE_L2CAP_EVT_CH_RX, The SDU is received.} + * @endevents + * + * @mscs + * @mmsc{@ref BLE_L2CAP_CH_RX_MSC} + * @endmscs + * + * @param[in] conn_handle Connection Handle. + * @param[in] local_cid Local Channel ID of the L2CAP channel. + * @param[in] p_sdu_buf Pointer to the SDU data buffer. + * + * @retval ::NRF_SUCCESS Buffer accepted. + * @retval ::NRF_ERROR_INVALID_ADDR Invalid pointer supplied. + * @retval ::BLE_ERROR_INVALID_CONN_HANDLE Invalid Connection Handle. + * @retval ::NRF_ERROR_INVALID_STATE Invalid State to perform operation (Setup or release is + * in progress for an L2CAP channel). + * @retval ::NRF_ERROR_NOT_FOUND CID not found. + * @retval ::NRF_ERROR_RESOURCES Too many SDU data buffers supplied. Wait for a + * @ref BLE_L2CAP_EVT_CH_RX event and retry. + */ +SVCALL(SD_BLE_L2CAP_CH_RX, uint32_t, sd_ble_l2cap_ch_rx(uint16_t conn_handle, uint16_t local_cid, ble_data_t const *p_sdu_buf)); + +/**@brief Transmit an SDU on an L2CAP channel. + * + * @note A call to this function will require the application to keep the memory pointed by + * @ref ble_data_t::p_data alive until the SDU data buffer is returned in @ref BLE_L2CAP_EVT_CH_TX + * or @ref BLE_L2CAP_EVT_CH_SDU_BUF_RELEASED event. + * + * @note The SoftDevice can queue up to @ref ble_l2cap_conn_cfg_t::tx_queue_size SDUs for + * transmission per L2CAP channel. + * + * @note The application can keep track of the available credits for transmission by following + * the procedure below: + * - Store initial credits given by the peer in a variable. + * (Initial credits are provided in a @ref BLE_L2CAP_EVT_CH_SETUP event.) + * - Decrement the variable, which stores the currently available credits, by + * ceiling((@ref ble_data_t::len + 2) / tx_mps) when a call to this function returns + * @ref NRF_SUCCESS. (tx_mps is provided in a @ref BLE_L2CAP_EVT_CH_SETUP event.) + * - Increment the variable, which stores the currently available credits, by additional + * credits given by the peer in a @ref BLE_L2CAP_EVT_CH_CREDIT event. + * + * @events + * @event{@ref BLE_L2CAP_EVT_CH_TX, The SDU is transmitted.} + * @endevents + * + * @mscs + * @mmsc{@ref BLE_L2CAP_CH_TX_MSC} + * @endmscs + * + * @param[in] conn_handle Connection Handle. + * @param[in] local_cid Local Channel ID of the L2CAP channel. + * @param[in] p_sdu_buf Pointer to the SDU data buffer. + * + * @retval ::NRF_SUCCESS Successfully queued L2CAP SDU for transmission. + * @retval ::NRF_ERROR_INVALID_ADDR Invalid pointer supplied. + * @retval ::BLE_ERROR_INVALID_CONN_HANDLE Invalid Connection Handle. + * @retval ::NRF_ERROR_INVALID_STATE Invalid State to perform operation (Setup or release is + * in progress for the L2CAP channel). + * @retval ::NRF_ERROR_NOT_FOUND CID not found. + * @retval ::NRF_ERROR_DATA_SIZE Invalid SDU length supplied, must not be more than + * @ref ble_l2cap_ch_tx_params_t::tx_mtu provided in + * @ref BLE_L2CAP_EVT_CH_SETUP event. + * @retval ::NRF_ERROR_RESOURCES Too many SDUs queued for transmission. Wait for a + * @ref BLE_L2CAP_EVT_CH_TX event and retry. + */ +SVCALL(SD_BLE_L2CAP_CH_TX, uint32_t, sd_ble_l2cap_ch_tx(uint16_t conn_handle, uint16_t local_cid, ble_data_t const *p_sdu_buf)); + +/**@brief Advanced SDU reception flow control. + * + * @details Adjust the way the SoftDevice issues credits to the peer. + * This may issue additional credits to the peer using an LE Flow Control Credit packet. + * + * @mscs + * @mmsc{@ref BLE_L2CAP_CH_FLOW_CONTROL_MSC} + * @endmscs + * + * @param[in] conn_handle Connection Handle. + * @param[in] local_cid Local Channel ID of the L2CAP channel or @ref BLE_L2CAP_CID_INVALID to set + * the value that will be used for newly created channels. + * @param[in] credits Number of credits that the SoftDevice will make sure the peer has every + * time it starts using a new reception buffer. + * - @ref BLE_L2CAP_CREDITS_DEFAULT is the default value the SoftDevice will + * use if this function is not called. + * - If set to zero, the SoftDevice will stop issuing credits for new reception + * buffers the application provides or has provided. SDU reception that is + * currently ongoing will be allowed to complete. + * @param[out] p_credits NULL or pointer to a uint16_t. If a valid pointer is provided, it will be + * written by the SoftDevice with the number of credits that is or will be + * available to the peer. If the value written by the SoftDevice is 0 when + * credits parameter was set to 0, the peer will not be able to send more + * data until more credits are provided by calling this function again with + * credits > 0. This parameter is ignored when local_cid is set to + * @ref BLE_L2CAP_CID_INVALID. + * + * @note Application should take care when setting number of credits higher than default value. In + * this case the application must make sure that the SoftDevice always has reception buffers + * available (see @ref sd_ble_l2cap_ch_rx) for that channel. If the SoftDevice does not have + * such buffers available, packets may be NACKed on the Link Layer and all Bluetooth traffic + * on the connection handle may be stalled until the SoftDevice again has an available + * reception buffer. This applies even if the application has used this call to set the + * credits back to default, or zero. + * + * @retval ::NRF_SUCCESS Flow control parameters accepted. + * @retval ::NRF_ERROR_INVALID_ADDR Invalid pointer supplied. + * @retval ::BLE_ERROR_INVALID_CONN_HANDLE Invalid Connection Handle. + * @retval ::NRF_ERROR_INVALID_STATE Invalid State to perform operation (Setup or release is + * in progress for an L2CAP channel). + * @retval ::NRF_ERROR_NOT_FOUND CID not found. + */ +SVCALL(SD_BLE_L2CAP_CH_FLOW_CONTROL, uint32_t, sd_ble_l2cap_ch_flow_control(uint16_t conn_handle, uint16_t local_cid, uint16_t credits, uint16_t *p_credits)); + +/** @} */ + +#ifdef __cplusplus +} +#endif +#endif // BLE_L2CAP_H__ + +/** + @} +*/ |