8b3eb368c6
Add support for Remote Port Negotiation (RPN) commands in the RFCOMM. This allows applications to configure the serial port parameters over RFCOMM connections, such as baud rate, data bits, stop bits, parity and flow control. Changes include: - Add enumerations for RPN parameters (baud rate, data bits, stop bits, parity) - Add a public API function bt_rfcomm_send_rpn_cmd() to send RPN commands - Add shell command to test RPN with default parameters This functionality is required by certain Bluetooth profiles that use RFCOMM and need to configure serial port parameters. Signed-off-by: Jiawei Yang <jiawei.yang_1@nxp.com>
185 lines
5.0 KiB
C
185 lines
5.0 KiB
C
/** @file
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* @brief Internal APIs for Bluetooth RFCOMM 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/classic/rfcomm.h>
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typedef enum {
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BT_RFCOMM_CFC_UNKNOWN,
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BT_RFCOMM_CFC_NOT_SUPPORTED,
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BT_RFCOMM_CFC_SUPPORTED,
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} __packed bt_rfcomm_cfc_t;
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/* RFCOMM signalling connection specific context */
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struct bt_rfcomm_session {
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/* L2CAP channel this context is associated with */
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struct bt_l2cap_br_chan br_chan;
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/* Response Timeout eXpired (RTX) timer */
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struct k_work_delayable rtx_work;
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/* Binary sem for aggregate fc */
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struct k_sem fc;
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struct bt_rfcomm_dlc *dlcs;
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uint16_t mtu;
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uint8_t state;
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bt_rfcomm_role_t role;
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bt_rfcomm_cfc_t cfc;
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};
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enum {
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BT_RFCOMM_STATE_IDLE,
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BT_RFCOMM_STATE_INIT,
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BT_RFCOMM_STATE_SECURITY_PENDING,
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BT_RFCOMM_STATE_CONNECTING,
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BT_RFCOMM_STATE_CONNECTED,
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BT_RFCOMM_STATE_CONFIG,
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BT_RFCOMM_STATE_USER_DISCONNECT,
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BT_RFCOMM_STATE_DISCONNECTING,
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BT_RFCOMM_STATE_DISCONNECTED,
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};
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struct bt_rfcomm_hdr {
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uint8_t address;
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uint8_t control;
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uint8_t length;
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} __packed;
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struct bt_rfcomm_hdr_ext {
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struct bt_rfcomm_hdr hdr;
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uint8_t second_length;
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} __packed;
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#define BT_RFCOMM_SABM 0x2f
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#define BT_RFCOMM_UA 0x63
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#define BT_RFCOMM_UIH 0xef
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struct bt_rfcomm_msg_hdr {
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uint8_t type;
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uint8_t len;
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} __packed;
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#define BT_RFCOMM_PN 0x20
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struct bt_rfcomm_pn {
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uint8_t dlci;
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uint8_t flow_ctrl;
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uint8_t priority;
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uint8_t ack_timer;
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uint16_t mtu;
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uint8_t max_retrans;
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uint8_t credits;
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} __packed;
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#define BT_RFCOMM_MSC 0x38
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struct bt_rfcomm_msc {
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uint8_t dlci;
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uint8_t v24_signal;
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} __packed;
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#define BT_RFCOMM_DISC 0x43
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#define BT_RFCOMM_DM 0x0f
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#define BT_RFCOMM_RLS 0x14
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struct bt_rfcomm_rls {
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uint8_t dlci;
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uint8_t line_status;
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} __packed;
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#define BT_RFCOMM_RPN 0x24
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#define BT_RFCOMM_TEST 0x08
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#define BT_RFCOMM_NSC 0x04
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#define BT_RFCOMM_FCON 0x28
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#define BT_RFCOMM_FCOFF 0x18
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/* DV = 1 IC = 0 RTR = 1 RTC = 1 FC = 0 EXT = 0 */
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#define BT_RFCOMM_DEFAULT_V24_SIG 0x8d
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#define BT_RFCOMM_GET_FC(v24_signal) (((v24_signal) & 0x02) >> 1)
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#define BT_RFCOMM_SIG_MIN_MTU 23
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#define BT_RFCOMM_SIG_MAX_MTU 32767
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#define BT_RFCOMM_CHECK_MTU(mtu) (!!((mtu) >= BT_RFCOMM_SIG_MIN_MTU && \
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(mtu) <= BT_RFCOMM_SIG_MAX_MTU))
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#define BT_RFCOMM_GET_DLCI(addr) (((addr) & 0xfc) >> 2)
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#define BT_RFCOMM_GET_FRAME_TYPE(ctrl) ((ctrl) & 0xef)
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#define BT_RFCOMM_GET_MSG_TYPE(type) (((type) & 0xfc) >> 2)
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#define BT_RFCOMM_GET_MSG_CR(type) (((type) & 0x02) >> 1)
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#define BT_RFCOMM_GET_LEN(len) (((len) & 0xfe) >> 1)
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#define BT_RFCOMM_GET_LEN_EXTENDED(first, second) ((((first) & 0xfe) >> 1) | ((second) << 7))
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#define BT_RFCOMM_GET_CHANNEL(dlci) ((dlci) >> 1)
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#define BT_RFCOMM_GET_PF(ctrl) (((ctrl) & 0x10) >> 4)
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#define BT_RFCOMM_SET_ADDR(dlci, cr) ((((dlci) & 0x3f) << 2) | \
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((cr) << 1) | 0x01)
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#define BT_RFCOMM_SET_CTRL(type, pf) (((type) & 0xef) | ((pf) << 4))
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#define BT_RFCOMM_SET_LEN_8(len) (((len) << 1) | 1)
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#define BT_RFCOMM_SET_LEN_16(len) ((len) << 1)
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#define BT_RFCOMM_SET_MSG_TYPE(type, cr) (((type) << 2) | (cr << 1) | 0x01)
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#define BT_RFCOMM_LEN_EXTENDED(len) (!((len) & 0x01))
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/* For CR in UIH Packet header
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* Initiating station have the C/R bit set to 1 and those sent by the
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* responding station have the C/R bit set to 0
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*/
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#define BT_RFCOMM_UIH_CR(role) ((role) == BT_RFCOMM_ROLE_INITIATOR)
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/* For CR in Non UIH Packet header
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* Command
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* Initiator --> Responder 1
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* Responder --> Initiator 0
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* Response
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* Initiator --> Responder 0
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* Responder --> Initiator 1
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*/
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#define BT_RFCOMM_CMD_CR(role) ((role) == BT_RFCOMM_ROLE_INITIATOR)
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#define BT_RFCOMM_RESP_CR(role) ((role) == BT_RFCOMM_ROLE_ACCEPTOR)
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/* For CR in MSG header
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* If the C/R bit is set to 1 the message is a command,
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* if it is set to 0 the message is a response.
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*/
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#define BT_RFCOMM_MSG_CMD_CR 1
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#define BT_RFCOMM_MSG_RESP_CR 0
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#define BT_RFCOMM_DLCI(role, channel) ((((channel) & 0x1f) << 1) | \
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((role) == BT_RFCOMM_ROLE_ACCEPTOR))
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/* Excluding ext bit */
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#define BT_RFCOMM_MAX_LEN_8 127
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/* Length can be 2 bytes depending on data size */
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#define BT_RFCOMM_HDR_SIZE (sizeof(struct bt_rfcomm_hdr) + 1)
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#define BT_RFCOMM_FCS_LEN_UIH 2
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#define BT_RFCOMM_FCS_LEN_NON_UIH 3
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/* For non UIH packets
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* The P bit set to 1 shall be used to solicit a response frame with the
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* F bit set to 1 from the other station.
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*/
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#define BT_RFCOMM_PF_NON_UIH 1
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/* For UIH packets
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* Both stations set the P-bit to 0
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* If credit based flow control is used, If P/F is 1 then one credit byte
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* will be there after control in the frame else no credit byte.
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*/
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#define BT_RFCOMM_PF_UIH 0
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#define BT_RFCOMM_PF_UIH_CREDIT 1
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#define BT_RFCOMM_PF_UIH_NO_CREDIT 0
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#define BT_RFCOMM_PN_CFC_CMD 0xf0
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#define BT_RFCOMM_PN_CFC_RESP 0xe0
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/* Initialize RFCOMM signal layer */
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void bt_rfcomm_init(void);
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