311 lines
7.8 KiB
C
311 lines
7.8 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 <bluetooth/l2cap.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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u16_t len;
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u16_t cid;
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} __packed;
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struct bt_l2cap_sig_hdr {
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u8_t code;
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u8_t ident;
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u16_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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u16_t reason;
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u8_t data[0];
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} __packed;
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struct bt_l2cap_cmd_reject_cid_data {
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u16_t scid;
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u16_t dcid;
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} __packed;
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#define BT_L2CAP_CONN_REQ 0x02
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struct bt_l2cap_conn_req {
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u16_t psm;
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u16_t scid;
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} __packed;
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/* command statuses in reposnse */
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#define BT_L2CAP_CS_NO_INFO 0x0000
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#define BT_L2CAP_CS_AUTHEN_PEND 0x0001
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/* valid results in conn response on BR/EDR */
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#define BT_L2CAP_BR_SUCCESS 0x0000
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#define BT_L2CAP_BR_PENDING 0x0001
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#define BT_L2CAP_BR_ERR_PSM_NOT_SUPP 0x0002
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#define BT_L2CAP_BR_ERR_SEC_BLOCK 0x0003
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#define BT_L2CAP_BR_ERR_NO_RESOURCES 0x0004
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#define BT_L2CAP_BR_ERR_INVALID_SCID 0x0006
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#define BT_L2CAP_BR_ERR_SCID_IN_USE 0x0007
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#define BT_L2CAP_CONN_RSP 0x03
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struct bt_l2cap_conn_rsp {
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u16_t dcid;
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u16_t scid;
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u16_t result;
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u16_t status;
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} __packed;
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#define BT_L2CAP_CONF_SUCCESS 0x0000
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#define BT_L2CAP_CONF_UNACCEPT 0x0001
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#define BT_L2CAP_CONF_REJECT 0x0002
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#define BT_L2CAP_CONF_REQ 0x04
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struct bt_l2cap_conf_req {
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u16_t dcid;
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u16_t flags;
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u8_t data[0];
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} __packed;
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#define BT_L2CAP_CONF_RSP 0x05
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struct bt_l2cap_conf_rsp {
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u16_t scid;
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u16_t flags;
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u16_t result;
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u8_t data[0];
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} __packed;
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/* Option type used by MTU config request data */
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#define BT_L2CAP_CONF_OPT_MTU 0x01
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/* Options bits selecting most significant bit (hint) in type field */
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#define BT_L2CAP_CONF_HINT 0x80
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#define BT_L2CAP_CONF_MASK 0x7f
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struct bt_l2cap_conf_opt {
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u8_t type;
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u8_t len;
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u8_t data[0];
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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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u16_t dcid;
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u16_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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u16_t dcid;
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u16_t scid;
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} __packed;
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#define BT_L2CAP_INFO_FEAT_MASK 0x0002
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#define BT_L2CAP_INFO_FIXED_CHAN 0x0003
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#define BT_L2CAP_INFO_REQ 0x0a
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struct bt_l2cap_info_req {
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u16_t type;
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} __packed;
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/* info result */
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#define BT_L2CAP_INFO_SUCCESS 0x0000
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#define BT_L2CAP_INFO_NOTSUPP 0x0001
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#define BT_L2CAP_INFO_RSP 0x0b
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struct bt_l2cap_info_rsp {
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u16_t type;
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u16_t result;
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u8_t data[0];
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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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u16_t min_interval;
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u16_t max_interval;
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u16_t latency;
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u16_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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u16_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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u16_t psm;
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u16_t scid;
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u16_t mtu;
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u16_t mps;
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u16_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_SUCCESS 0x0000
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#define BT_L2CAP_ERR_PSM_NOT_SUPP 0x0002
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#define BT_L2CAP_ERR_NO_RESOURCES 0x0004
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#define BT_L2CAP_ERR_AUTHENTICATION 0x0005
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#define BT_L2CAP_ERR_AUTHORIZATION 0x0006
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#define BT_L2CAP_ERR_KEY_SIZE 0x0007
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#define BT_L2CAP_ERR_ENCRYPTION 0x0008
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#define BT_L2CAP_ERR_INVALID_SCID 0x0009
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#define BT_L2CAP_ERR_SCID_IN_USE 0x000A
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#define BT_L2CAP_ERR_UNACCEPT_PARAMS 0x000B
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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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u16_t dcid;
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u16_t mtu;
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u16_t mps;
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u16_t credits;
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u16_t result;
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};
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#define BT_L2CAP_LE_CREDITS 0x16
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struct bt_l2cap_le_credits {
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u16_t cid;
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u16_t credits;
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} __packed;
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#define BT_L2CAP_SDU_HDR_LEN 2
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#if defined(CONFIG_BT_HCI_ACL_FLOW_CONTROL)
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#define BT_L2CAP_RX_MTU CONFIG_BT_L2CAP_RX_MTU
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#else
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#define BT_L2CAP_RX_MTU (CONFIG_BT_RX_BUF_LEN - \
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BT_HCI_ACL_HDR_SIZE - BT_L2CAP_HDR_SIZE)
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#endif
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struct bt_l2cap_fixed_chan {
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u16_t cid;
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int (*accept)(struct bt_conn *conn, struct bt_l2cap_chan **chan);
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sys_snode_t node;
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};
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/* Register a fixed L2CAP channel for L2CAP */
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void bt_l2cap_le_fixed_chan_register(struct bt_l2cap_fixed_chan *chan);
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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_DEBUG_L2CAP)
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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_DEBUG_L2CAP */
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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_encrypt_change(struct bt_conn *conn, u8_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(struct net_buf_pool *pool, size_t reserve);
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/* Prepare a L2CAP Response PDU to be sent over a connection */
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struct net_buf *bt_l2cap_create_rsp(struct net_buf *buf, size_t reserve);
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/* Send L2CAP PDU over a connection */
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void bt_l2cap_send_cb(struct bt_conn *conn, u16_t cid, struct net_buf *buf,
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bt_conn_tx_cb_t cb);
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static inline void bt_l2cap_send(struct bt_conn *conn, u16_t cid,
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struct net_buf *buf)
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{
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bt_l2cap_send_cb(conn, cid, buf, NULL);
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}
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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);
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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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u16_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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u16_t cid);
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/* Initialize BR/EDR L2CAP signal layer */
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void bt_l2cap_br_init(void);
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/* Register fixed channel */
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void bt_l2cap_br_fixed_chan_register(struct bt_l2cap_fixed_chan *chan);
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/* Notify BR/EDR L2CAP channels about established new ACL connection */
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void bt_l2cap_br_connected(struct bt_conn *conn);
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/* Lookup BR/EDR L2CAP channel by Receiver CID */
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struct bt_l2cap_chan *bt_l2cap_br_lookup_rx_cid(struct bt_conn *conn,
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u16_t cid);
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/* Disconnects dynamic channel */
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int bt_l2cap_br_chan_disconnect(struct bt_l2cap_chan *chan);
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/* Make connection to peer psm server */
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int bt_l2cap_br_chan_connect(struct bt_conn *conn, struct bt_l2cap_chan *chan,
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u16_t psm);
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/* Send packet data to connected peer */
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int bt_l2cap_br_chan_send(struct bt_l2cap_chan *chan, struct net_buf *buf);
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/*
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* Handle security level changed on link passing HCI status of performed
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* security procedure.
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*/
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void l2cap_br_encrypt_change(struct bt_conn *conn, u8_t hci_status);
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/* Handle received data */
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void bt_l2cap_br_recv(struct bt_conn *conn, struct net_buf *buf);
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