5a8daffc32
This API gives better control on L2CAP COC credits and suits better for Upper Tester implementation. Co-authored-by: Szymon Janc <szymon.janc@codecoup.pl> Signed-off-by: Aleksander Wasaznik <aleksander.wasaznik@nordicsemi.no>
251 lines
6.9 KiB
C
251 lines
6.9 KiB
C
/** @file
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* @brief Internal APIs for Bluetooth L2CAP handling.
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*/
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/*
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* Copyright (c) 2015-2016 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/bluetooth/l2cap.h>
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#include <zephyr/sys/iterable_sections.h>
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#include "host/classic/l2cap_br_interface.h"
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enum l2cap_conn_list_action {
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BT_L2CAP_CHAN_LOOKUP,
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BT_L2CAP_CHAN_DETACH,
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};
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#define BT_L2CAP_CID_BR_SIG 0x0001
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#define BT_L2CAP_CID_ATT 0x0004
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#define BT_L2CAP_CID_LE_SIG 0x0005
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#define BT_L2CAP_CID_SMP 0x0006
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#define BT_L2CAP_CID_BR_SMP 0x0007
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#define BT_L2CAP_PSM_RFCOMM 0x0003
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struct bt_l2cap_hdr {
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uint16_t len;
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uint16_t cid;
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} __packed;
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struct bt_l2cap_sig_hdr {
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uint8_t code;
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uint8_t ident;
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uint16_t len;
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} __packed;
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#define BT_L2CAP_REJ_NOT_UNDERSTOOD 0x0000
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#define BT_L2CAP_REJ_MTU_EXCEEDED 0x0001
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#define BT_L2CAP_REJ_INVALID_CID 0x0002
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#define BT_L2CAP_CMD_REJECT 0x01
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struct bt_l2cap_cmd_reject {
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uint16_t reason;
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uint8_t data[0];
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} __packed;
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struct bt_l2cap_cmd_reject_cid_data {
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uint16_t scid;
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uint16_t dcid;
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} __packed;
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#define BT_L2CAP_DISCONN_REQ 0x06
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struct bt_l2cap_disconn_req {
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uint16_t dcid;
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uint16_t scid;
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} __packed;
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#define BT_L2CAP_DISCONN_RSP 0x07
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struct bt_l2cap_disconn_rsp {
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uint16_t dcid;
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uint16_t scid;
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} __packed;
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#define BT_L2CAP_CONN_PARAM_REQ 0x12
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struct bt_l2cap_conn_param_req {
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uint16_t min_interval;
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uint16_t max_interval;
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uint16_t latency;
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uint16_t timeout;
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} __packed;
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#define BT_L2CAP_CONN_PARAM_ACCEPTED 0x0000
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#define BT_L2CAP_CONN_PARAM_REJECTED 0x0001
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#define BT_L2CAP_CONN_PARAM_RSP 0x13
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struct bt_l2cap_conn_param_rsp {
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uint16_t result;
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} __packed;
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#define BT_L2CAP_LE_CONN_REQ 0x14
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struct bt_l2cap_le_conn_req {
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uint16_t psm;
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uint16_t scid;
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uint16_t mtu;
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uint16_t mps;
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uint16_t credits;
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} __packed;
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/* valid results in conn response on LE */
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#define BT_L2CAP_LE_SUCCESS 0x0000
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#define BT_L2CAP_LE_ERR_PSM_NOT_SUPP 0x0002
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#define BT_L2CAP_LE_ERR_NO_RESOURCES 0x0004
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#define BT_L2CAP_LE_ERR_AUTHENTICATION 0x0005
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#define BT_L2CAP_LE_ERR_AUTHORIZATION 0x0006
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#define BT_L2CAP_LE_ERR_KEY_SIZE 0x0007
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#define BT_L2CAP_LE_ERR_ENCRYPTION 0x0008
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#define BT_L2CAP_LE_ERR_INVALID_SCID 0x0009
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#define BT_L2CAP_LE_ERR_SCID_IN_USE 0x000A
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#define BT_L2CAP_LE_ERR_UNACCEPT_PARAMS 0x000B
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#define BT_L2CAP_LE_ERR_INVALID_PARAMS 0x000C
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#define BT_L2CAP_LE_CONN_RSP 0x15
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struct bt_l2cap_le_conn_rsp {
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uint16_t dcid;
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uint16_t mtu;
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uint16_t mps;
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uint16_t credits;
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uint16_t result;
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} __packed;
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#define BT_L2CAP_LE_CREDITS 0x16
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struct bt_l2cap_le_credits {
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uint16_t cid;
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uint16_t credits;
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} __packed;
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#define BT_L2CAP_ECRED_CONN_REQ 0x17
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struct bt_l2cap_ecred_conn_req {
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uint16_t psm;
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uint16_t mtu;
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uint16_t mps;
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uint16_t credits;
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uint16_t scid[0];
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} __packed;
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#define BT_L2CAP_ECRED_CONN_RSP 0x18
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struct bt_l2cap_ecred_conn_rsp {
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uint16_t mtu;
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uint16_t mps;
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uint16_t credits;
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uint16_t result;
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uint16_t dcid[0];
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} __packed;
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#define BT_L2CAP_ECRED_RECONF_REQ 0x19
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struct bt_l2cap_ecred_reconf_req {
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uint16_t mtu;
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uint16_t mps;
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uint16_t scid[0];
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} __packed;
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#define BT_L2CAP_RECONF_SUCCESS 0x0000
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#define BT_L2CAP_RECONF_INVALID_MTU 0x0001
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#define BT_L2CAP_RECONF_INVALID_MPS 0x0002
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#define BT_L2CAP_RECONF_INVALID_CID 0x0003
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#define BT_L2CAP_RECONF_OTHER_UNACCEPT 0x0004
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#define BT_L2CAP_ECRED_RECONF_RSP 0x1a
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struct bt_l2cap_ecred_reconf_rsp {
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uint16_t result;
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} __packed;
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struct bt_l2cap_fixed_chan {
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uint16_t cid;
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int (*accept)(struct bt_conn *conn, struct bt_l2cap_chan **chan);
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bt_l2cap_chan_destroy_t destroy;
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};
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#define BT_L2CAP_CHANNEL_DEFINE(_name, _cid, _accept, _destroy) \
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const STRUCT_SECTION_ITERABLE(bt_l2cap_fixed_chan, _name) = { \
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.cid = _cid, \
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.accept = _accept, \
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.destroy = _destroy, \
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}
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/* Notify L2CAP channels of a new connection */
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void bt_l2cap_connected(struct bt_conn *conn);
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/* Notify L2CAP channels of a disconnect event */
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void bt_l2cap_disconnected(struct bt_conn *conn);
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/* Add channel to the connection */
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void bt_l2cap_chan_add(struct bt_conn *conn, struct bt_l2cap_chan *chan,
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bt_l2cap_chan_destroy_t destroy);
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/* Remove channel from the connection */
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void bt_l2cap_chan_remove(struct bt_conn *conn, struct bt_l2cap_chan *chan);
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/* Delete channel */
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void bt_l2cap_chan_del(struct bt_l2cap_chan *chan);
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const char *bt_l2cap_chan_state_str(bt_l2cap_chan_state_t state);
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#if defined(CONFIG_BT_L2CAP_LOG_LEVEL_DBG)
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void bt_l2cap_chan_set_state_debug(struct bt_l2cap_chan *chan,
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bt_l2cap_chan_state_t state,
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const char *func, int line);
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#define bt_l2cap_chan_set_state(_chan, _state) \
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bt_l2cap_chan_set_state_debug(_chan, _state, __func__, __LINE__)
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#else
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void bt_l2cap_chan_set_state(struct bt_l2cap_chan *chan,
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bt_l2cap_chan_state_t state);
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#endif /* CONFIG_BT_L2CAP_LOG_LEVEL_DBG */
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/*
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* Notify L2CAP channels of a change in encryption state passing additionally
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* HCI status of performed security procedure.
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*/
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void bt_l2cap_security_changed(struct bt_conn *conn, uint8_t hci_status);
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/* Prepare an L2CAP PDU to be sent over a connection */
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struct net_buf *bt_l2cap_create_pdu_timeout(struct net_buf_pool *pool,
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size_t reserve,
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k_timeout_t timeout);
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#define bt_l2cap_create_pdu(_pool, _reserve) \
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bt_l2cap_create_pdu_timeout(_pool, _reserve, K_FOREVER)
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/* Send L2CAP PDU over a connection
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*
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* Buffer ownership is transferred to stack in case of success.
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*/
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int bt_l2cap_send_pdu(struct bt_l2cap_le_chan *le_chan, struct net_buf *pdu,
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bt_conn_tx_cb_t cb, void *user_data);
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/* Receive a new L2CAP PDU from a connection */
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void bt_l2cap_recv(struct bt_conn *conn, struct net_buf *buf, bool complete);
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/* Perform connection parameter update request */
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int bt_l2cap_update_conn_param(struct bt_conn *conn,
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const struct bt_le_conn_param *param);
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/* Initialize L2CAP and supported channels */
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void bt_l2cap_init(void);
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/* Lookup channel by Transmission CID */
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struct bt_l2cap_chan *bt_l2cap_le_lookup_tx_cid(struct bt_conn *conn,
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uint16_t cid);
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/* Lookup channel by Receiver CID */
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struct bt_l2cap_chan *bt_l2cap_le_lookup_rx_cid(struct bt_conn *conn,
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uint16_t cid);
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struct bt_l2cap_ecred_cb {
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void (*ecred_conn_rsp)(struct bt_conn *conn, uint16_t result, uint8_t attempted,
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uint8_t succeeded, uint16_t psm);
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void (*ecred_conn_req)(struct bt_conn *conn, uint16_t result, uint16_t psm);
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};
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/* Register callbacks for Enhanced Credit based Flow Control */
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void bt_l2cap_register_ecred_cb(const struct bt_l2cap_ecred_cb *cb);
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/* Returns a server if it exists for given psm. */
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struct bt_l2cap_server *bt_l2cap_server_lookup_psm(uint16_t psm);
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/* Pull data from the L2CAP layer */
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struct net_buf *l2cap_data_pull(struct bt_conn *conn,
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size_t amount,
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size_t *length);
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