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components/bt/host/bluedroid/btc/profile/std/l2cap/btc_l2cap.c
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/*
* SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <string.h>
#include "btc_l2cap.h"
#include "stack/l2c_api.h"
#include "btc/btc_manage.h"
#include "btc/btc_task.h"
#include "bta/bta_jv_api.h"
#include "common/bt_trace.h"
#include "osi/allocator.h"
#include "esp_l2cap_bt_api.h"
#include "osi/list.h"
#include "freertos/ringbuf.h"
#include "osi/mutex.h"
#include "osi/alarm.h"
#include <sys/errno.h>
#include <sys/lock.h>
#include <sys/fcntl.h>
#include "esp_vfs.h"
#include "esp_vfs_dev.h"
#include "stack/port_api.h"
#include "freertos/FreeRTOS.h"
#include "freertos/event_groups.h"
#include "btc_sdp.h"
#include "btc/btc_task.h"
#include "stack/btu.h"
#if (defined BTC_L2CAP_INCLUDED && BTC_L2CAP_INCLUDED == TRUE)
#define SLOT_WRITE_BIT(i) (1UL << (i - 1))
#define SLOT_CLOSE_BIT(i) (1UL << (i + BTA_JV_MAX_L2C_CONN - 1))
#define VFS_WRITE_TIMEOUT (40 * 1000)
#define SLOT_TX_QUEUE_SIZE 10
#define SLOT_TX_QUEUE_LOW_WM 4
#define SLOT_TX_DATA_HIGH_WM (SLOT_TX_QUEUE_SIZE * BTA_JV_DEF_RFC_MTU)
#define VFS_CLOSE_TIMEOUT (20 * 1000)
#define BTC_L2CAP_ROLE_MASTER 0
#define BTC_L2CAP_ROLE_SLAVE 1
typedef struct {
bool peer_fc; /* true if flow control is set based on peer's request */
bool user_fc; /* true if flow control is set based on user's request */
fixed_queue_t *queue; /* Queue of buffers waiting to be sent */
uint32_t data_size; /* Number of data bytes in the queue */
} slot_data_t;
typedef struct {
bool connected;
bool is_server;
bool fix_chan; // unused
uint16_t psm;
uint8_t serial;
uint8_t max_session;
uint32_t id;
uint32_t handle;
int fd;
int tx_mtu;
uint8_t *write_data;
osi_alarm_t *close_alarm;
void *alarm_arg;
uint8_t role;
uint16_t security;
esp_bd_addr_t addr;
slot_data_t rx;
slot_data_t tx;
uint8_t service_uuid[16];
} l2cap_slot_t;
typedef struct {
l2cap_slot_t *l2cap_slots[BTA_JV_MAX_L2C_CONN + 1];
uint32_t l2cap_slot_id;
osi_mutex_t l2cap_slot_mutex;
EventGroupHandle_t tx_event_group;
esp_vfs_id_t l2cap_vfs_id;
} l2cap_local_param_t;
static l2cap_local_param_t l2cap_local_param;
/* L2CAP default options for OBEX connections */
static const tL2CAP_FCR_OPTS obex_l2c_fcr_opts_def =
{
L2CAP_FCR_ERTM_MODE, /* Mandatory for OBEX over l2cap */
OBX_FCR_OPT_TX_WINDOW_SIZE_BR_EDR,/* Tx window size */
OBX_FCR_OPT_MAX_TX_B4_DISCNT, /* Maximum transmissions before disconnecting */
OBX_FCR_OPT_RETX_TOUT, /* Retransmission timeout (2 secs) */
OBX_FCR_OPT_MONITOR_TOUT, /* Monitor timeout (12 secs) */
OBX_FCR_OPT_MAX_PDU_SIZE /* MPS segment size */
};
static const tL2CAP_ERTM_INFO obex_l2c_etm_opt =
{
L2CAP_FCR_ERTM_MODE, /* Mandatory for OBEX over l2cap */
L2CAP_FCR_CHAN_OPT_ERTM, /* Mandatory for OBEX over l2cap */
OBX_USER_RX_POOL_ID,
OBX_USER_TX_POOL_ID,
OBX_FCR_RX_POOL_ID,
OBX_FCR_TX_POOL_ID
};
#if L2CAP_DYNAMIC_MEMORY == FALSE
#define is_l2cap_init() (l2cap_local_param.l2cap_slot_mutex != NULL)
#else
#define is_l2cap_init() (&l2cap_local_param != NULL && l2cap_local_param.l2cap_slot_mutex != NULL)
#endif
static void l2cap_osi_free(void *p)
{
osi_free(p);
}
static l2cap_slot_t *l2cap_find_slot_by_handle(uint32_t handle)
{
l2cap_slot_t *slot = NULL;
for (size_t i = 1; i <= BTA_JV_MAX_L2C_CONN; i++) {
slot = l2cap_local_param.l2cap_slots[i];
if (slot != NULL && slot->handle == handle) {
return slot;
}
}
return NULL;
}
static l2cap_slot_t *l2cap_find_slot_by_id(uint32_t id)
{
l2cap_slot_t *slot = NULL;
for (size_t i = 1; i <= BTA_JV_MAX_L2C_CONN; i++) {
slot = l2cap_local_param.l2cap_slots[i];
if (slot != NULL && slot->id == id) {
return slot;
}
}
return NULL;
}
static l2cap_slot_t *l2cap_find_slot_by_fd(int fd)
{
l2cap_slot_t *slot = NULL;
for (size_t i = 1; i <= BTA_JV_MAX_L2C_CONN; i++) {
slot = l2cap_local_param.l2cap_slots[i];
if (slot != NULL && slot->fd == fd) {
return slot;
}
}
return NULL;
}
static int init_slot_data(slot_data_t *slot_data, size_t queue_size)
{
memset(slot_data, 0, sizeof(slot_data_t));
if ((slot_data->queue = fixed_queue_new(queue_size)) == NULL) {
return -1;
}
slot_data->data_size = 0;
return 0;
}
static void free_slot_data(slot_data_t *slot_data)
{
fixed_queue_free(slot_data->queue, l2cap_osi_free);
slot_data->queue = NULL;
}
static l2cap_slot_t *l2cap_malloc_slot(void)
{
uint8_t err_no = 0;
l2cap_slot_t **slot = NULL;
if (++l2cap_local_param.l2cap_slot_id == 0) {
l2cap_local_param.l2cap_slot_id = 1;
}
for (size_t i = 1; i <= BTA_JV_MAX_L2C_CONN; i++) {
slot = &l2cap_local_param.l2cap_slots[i];
if ((*slot) == NULL) {
if (((*slot) = (l2cap_slot_t *)osi_malloc(sizeof(l2cap_slot_t))) == NULL) {
return NULL;
}
(*slot)->id = l2cap_local_param.l2cap_slot_id;
(*slot)->psm = 0;
(*slot)->serial = i;
(*slot)->handle = 0xffff;
(*slot)->fd = -1;
(*slot)->connected = false;
(*slot)->is_server = false;
(*slot)->write_data = NULL;
(*slot)->close_alarm = NULL;
(*slot)->alarm_arg = NULL;
/* clear the old event bits */
if (l2cap_local_param.tx_event_group) {
xEventGroupClearBits(l2cap_local_param.tx_event_group, SLOT_WRITE_BIT(i) | SLOT_CLOSE_BIT(i));
}
if (init_slot_data(&(*slot)->rx, QUEUE_SIZE_MAX)) {
BTC_TRACE_ERROR("%s unable to malloc rx queue!", __func__);
err_no = 1;
goto err;
}
if (init_slot_data(&(*slot)->tx, SLOT_TX_QUEUE_SIZE)) {
BTC_TRACE_ERROR("%s unable to malloc tx queue!", __func__);
err_no = 2;
goto err;
}
if (esp_vfs_register_fd(l2cap_local_param.l2cap_vfs_id, &(*slot)->fd) != ESP_OK) {
BTC_TRACE_ERROR("%s unable to register fd!", __func__);
err_no = 3;
goto err;
}
return (*slot);
}
}
return NULL;
err:
switch (err_no) {
case 3:
free_slot_data(&(*slot)->tx);
case 2:
free_slot_data(&(*slot)->rx);
case 1:
osi_free((*slot));
(*slot) = NULL;
break;
default:
break;
}
return (*slot);
}
static void l2cap_free_slot(l2cap_slot_t *slot)
{
if (!slot) {
return;
}
l2cap_local_param.l2cap_slots[slot->serial] = NULL;
esp_vfs_unregister_fd(l2cap_local_param.l2cap_vfs_id, slot->fd);
xEventGroupSetBits(l2cap_local_param.tx_event_group, SLOT_CLOSE_BIT(slot->serial));
free_slot_data(&slot->tx);
free_slot_data(&slot->rx);
if (slot->close_alarm) {
osi_alarm_free(slot->close_alarm);
if (slot->alarm_arg) {
osi_free(slot->alarm_arg);
slot->alarm_arg = NULL;
}
}
osi_free(slot);
}
static void l2cap_free_pending_slots(void)
{
l2cap_slot_t *slot = NULL;
for (size_t i = 1; i <= BTA_JV_MAX_L2C_CONN; i++) {
slot = l2cap_local_param.l2cap_slots[i];
if (slot) {
BTC_TRACE_WARNING("%s found slot(handle=0x%x) pending to close, close it now!", __func__, slot->handle);
l2cap_free_slot(slot);
}
}
}
static void close_timeout_handler(void *arg)
{
btc_msg_t msg;
bt_status_t status;
l2cap_slot_t *slot = (l2cap_slot_t *)arg;
msg.sig = BTC_SIG_API_CB;
msg.pid = BTC_PID_L2CAP;
msg.act = BTA_JV_L2CAP_CLOSE_EVT;
status = btc_transfer_context(&msg, slot->alarm_arg, sizeof(tBTA_JV), NULL, NULL);
if (slot->alarm_arg) {
osi_free(slot->alarm_arg);
slot->alarm_arg = NULL;
}
if (status != BT_STATUS_SUCCESS) {
BTC_TRACE_ERROR("%s btc_transfer_context failed", __func__);
}
}
static inline void btc_l2cap_cb_to_app(esp_bt_l2cap_cb_event_t event, esp_bt_l2cap_cb_param_t *param)
{
esp_bt_l2cap_cb_t btc_l2cap_cb = (esp_bt_l2cap_cb_t)btc_profile_cb_get(BTC_PID_L2CAP);
if (btc_l2cap_cb) {
btc_l2cap_cb(event, param);
}
}
static void *btc_l2cap_inter_cb(tBTA_JV_EVT event, tBTA_JV *p_data, void *user_data)
{
bt_status_t status;
btc_msg_t msg;
uint32_t id = (uintptr_t)user_data;
l2cap_slot_t *slot = NULL;
switch (event) {
case BTA_JV_L2CAP_OPEN_EVT:
slot = l2cap_find_slot_by_id(id);
if (!slot) {
BTC_TRACE_ERROR("%s unable to find L2CAP slot, event:%d!", __func__, event);
p_data->l2c_open.status = ESP_BT_L2CAP_NO_CONNECTION;
break;
}
slot->connected = TRUE;
slot->handle = p_data->l2c_open.handle;
slot->tx_mtu = p_data->l2c_open.tx_mtu;
BTA_JvSetPmProfile(p_data->l2c_open.handle, BTA_JV_PM_ID_1, BTA_JV_CONN_OPEN);
break;
case BTA_JV_L2CAP_START_EVT:
slot = l2cap_find_slot_by_id(id);
if (!slot) {
BTC_TRACE_ERROR("%s unable to find L2CAP slot, event:%d!", __func__, event);
p_data->l2c_open.status = ESP_BT_L2CAP_NO_CONNECTION;
break;
}
slot->handle = p_data->l2c_start.handle;
break;
case BTA_JV_L2CAP_CLOSE_EVT:
slot = l2cap_find_slot_by_id(id);
if (!slot) {
BTC_TRACE_ERROR("%s unable to find RFCOMM slot, event:%d!", __func__, event);
p_data->l2c_close.status = ESP_BT_L2CAP_NO_CONNECTION;
break;
}
p_data->l2c_close.status = BTA_JV_SUCCESS;
p_data->l2c_close.user_data = (void *)(uintptr_t)slot->id;
break;
case BTA_JV_L2CAP_CL_INIT_EVT:
slot = l2cap_find_slot_by_id(id);
if (!slot) {
BTC_TRACE_ERROR("%s unable to find L2CAP slot, event:%d!", __func__, event);
p_data->l2c_cl_init.status = ESP_BT_L2CAP_FAILURE;
break;
}
if (p_data->l2c_cl_init.status == BTA_JV_SUCCESS) {
slot->handle = p_data->l2c_cl_init.handle;
} else {
l2cap_free_slot(slot);
}
break;
case BTA_JV_L2CAP_DATA_IND_EVT:
// to do
break;
case BTA_JV_FREE_SCN_EVT:
slot = l2cap_find_slot_by_id(id);
if (slot) {
l2cap_free_slot(slot);
} else {
BTC_TRACE_ERROR("%s unable to find L2CAP slot, event:%d!", __func__, event);
p_data->free_scn.status = ESP_BT_L2CAP_NO_CONNECTION;
}
break;
default:
break;
}
msg.sig = BTC_SIG_API_CB;
msg.pid = BTC_PID_L2CAP;
msg.act = event;
status = btc_transfer_context(&msg, p_data, sizeof(tBTA_JV), NULL, NULL);
if (status != BT_STATUS_SUCCESS) {
BTC_TRACE_ERROR("%s btc_transfer_context failed\n", __func__);
}
return NULL;
}
static void btc_l2cap_dm_inter_cb(tBTA_JV_EVT event, tBTA_JV *p_data, void *user_data)
{
bt_status_t status;
btc_msg_t msg;
switch (event) {
default:
msg.sig = BTC_SIG_API_CB;
msg.pid = BTC_PID_L2CAP;
msg.act = event;
status = btc_transfer_context(&msg, p_data, sizeof(tBTA_JV), NULL, NULL);
if (status != BT_STATUS_SUCCESS) {
BTC_TRACE_ERROR("%s btc_transfer_context failed\n", __func__);
}
break;
}
return;
}
static void btc_l2cap_init(void)
{
esp_bt_l2cap_status_t ret = ESP_BT_L2CAP_SUCCESS;
esp_bt_l2cap_cb_param_t param;
do {
if (is_l2cap_init()) {
BTC_TRACE_ERROR("%s L2CAP has been initiated, shall uninit first!", __func__);
ret = ESP_BT_L2CAP_NEED_DEINIT;
break;
}
#if L2CAP_DYNAMIC_MEMORY == TRUE
if ((l2cap_local_param_ptr = (l2cap_local_param_t *)osi_malloc(sizeof(l2cap_local_param_t))) == NULL) {
BTC_TRACE_ERROR("%s malloc failed\n", __func__);
ret = ESP_BT_L2CAP_NO_RESOURCE;
break;
}
memset((void *)l2cap_local_param_ptr, 0, sizeof(l2cap_local_param_t));
#endif
l2cap_local_param.l2cap_vfs_id = -1;
if (osi_mutex_new(&l2cap_local_param.l2cap_slot_mutex) != 0) {
#if L2CAP_DYNAMIC_MEMORY == TRUE
osi_free(l2cap_local_param_ptr);
l2cap_local_param_ptr = NULL;
#endif
BTC_TRACE_ERROR("%s osi_mutex_new failed\n", __func__);
ret = ESP_BT_L2CAP_NO_RESOURCE;
break;
}
if ((l2cap_local_param.tx_event_group = xEventGroupCreate()) == NULL) {
BTC_TRACE_ERROR("%s create tx_event_group failed\n", __func__);
osi_mutex_free(&l2cap_local_param.l2cap_slot_mutex);
#if L2CAP_DYNAMIC_MEMORY == TRUE
osi_free(l2cap_local_param_ptr);
l2cap_local_param_ptr = NULL;
#endif
ret = ESP_BT_L2CAP_NO_RESOURCE;
break;
}
l2cap_local_param.l2cap_slot_id = 0;
ret = BTA_JvEnable((tBTA_JV_DM_CBACK *)btc_l2cap_dm_inter_cb);
if (BTA_JV_ALREADY_DONE == ret) {
ret = ESP_BT_L2CAP_SUCCESS;
param.init.status = ESP_BT_L2CAP_SUCCESS;
btc_l2cap_cb_to_app(ESP_BT_L2CAP_INIT_EVT, ¶m);
}
} while (0);
if (ret != ESP_BT_L2CAP_SUCCESS) {
param.init.status = ret;
btc_l2cap_cb_to_app(ESP_BT_L2CAP_INIT_EVT, ¶m);
}
}
static void btc_l2cap_uninit(void)
{
esp_bt_l2cap_status_t ret = ESP_BT_L2CAP_SUCCESS;
do {
if (!is_l2cap_init()) {
BTC_TRACE_ERROR("%s L2CAP has not been initiated, shall init first!", __func__);
ret = ESP_BT_L2CAP_NEED_INIT;
break;
}
osi_mutex_lock(&l2cap_local_param.l2cap_slot_mutex, OSI_MUTEX_MAX_TIMEOUT);
// first, remove all connection
for (size_t i = 1; i <= BTA_JV_MAX_L2C_CONN; i++) {
if (l2cap_local_param.l2cap_slots[i] != NULL && !l2cap_local_param.l2cap_slots[i]->is_server) {
BTA_JvL2capClose(l2cap_local_param.l2cap_slots[i]->handle, (tBTA_JV_L2CAP_CBACK *)btc_l2cap_inter_cb,
(void *)l2cap_local_param.l2cap_slots[i]->id);
}
}
// second, remove all server
for (size_t i = 1; i <= BTA_JV_MAX_L2C_CONN; i++) {
if (l2cap_local_param.l2cap_slots[i] != NULL && l2cap_local_param.l2cap_slots[i]->is_server) {
if (l2cap_local_param.l2cap_slots[i]->handle != 0xffff) {
BTA_JvL2capStopServer(l2cap_local_param.l2cap_slots[i]->psm,
(void *)l2cap_local_param.l2cap_slots[i]->id);
}
BTA_JvFreeChannel(l2cap_local_param.l2cap_slots[i]->psm, BTA_JV_CONN_TYPE_L2CAP,
(tBTA_JV_RFCOMM_CBACK *)btc_l2cap_inter_cb, (void *)l2cap_local_param.l2cap_slots[i]->id);
}
}
BTA_JvDisable((tBTA_JV_L2CAP_CBACK *)btc_l2cap_inter_cb);
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
} while(0);
if (ret != ESP_BT_L2CAP_SUCCESS) {
esp_bt_l2cap_cb_param_t param;
param.uninit.status = ret;
btc_l2cap_cb_to_app(ESP_BT_L2CAP_UNINIT_EVT, ¶m);
}
}
static void btc_l2cap_start_srv(btc_l2cap_args_t *arg)
{
esp_bt_l2cap_status_t ret = ESP_BT_L2CAP_SUCCESS;
tL2CAP_CFG_INFO cfg;
do {
if (!is_l2cap_init()) {
BTC_TRACE_ERROR("%s L2CAP have not been init\n", __func__);
ret = ESP_BT_L2CAP_NEED_INIT;
break;
}
osi_mutex_lock(&l2cap_local_param.l2cap_slot_mutex, OSI_MUTEX_MAX_TIMEOUT);
l2cap_slot_t *slot = l2cap_malloc_slot();
if (!slot) {
BTC_TRACE_ERROR("%s unable to malloc L2CAP slot!", __func__);
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
ret = ESP_BT_L2CAP_NO_RESOURCE;
break;
}
/**
* make this slot become a listening slot
*/
slot->is_server = true;
slot->security = arg->start_srv.sec_mask;
slot->role = BTC_L2CAP_ROLE_SLAVE;
slot->psm = arg->start_srv.local_psm;
/* Setup ETM settings */
memset(&cfg, 0, sizeof(tL2CAP_CFG_INFO));
cfg.fcr_present = TRUE;
cfg.fcr = obex_l2c_fcr_opts_def;
BTA_JvL2capStartServer(slot->security, slot->role, &obex_l2c_etm_opt, slot->psm,
L2CAP_MAX_SDU_LENGTH, &cfg, (tBTA_JV_L2CAP_CBACK *)btc_l2cap_inter_cb, (void *)slot->id);
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
} while(0);
if (ret != ESP_BT_L2CAP_SUCCESS) {
esp_bt_l2cap_cb_param_t param;
param.start.status = ret;
param.start.handle = 0xffff;
param.start.sec_id = 0;
btc_l2cap_cb_to_app(ESP_BT_L2CAP_START_EVT, ¶m);
}
return;
}
static void btc_l2cap_stop_srv(btc_l2cap_args_t *arg)
{
esp_bt_l2cap_status_t ret = ESP_BT_L2CAP_SUCCESS;
bool is_remove_all = false;
uint8_t i, j, srv_cnt = 0;
uint8_t *srv_psm_arr = osi_malloc(BTA_JV_MAX_L2C_CONN);
if (arg->stop_srv.psm == BTC_L2CAP_INVALID_PSM) {
is_remove_all = true;
}
do {
if (!is_l2cap_init()) {
BTC_TRACE_ERROR("%s L2CAP have not been init\n", __func__);
ret = ESP_BT_L2CAP_NEED_INIT;
break;
}
if (srv_psm_arr == NULL) {
BTC_TRACE_ERROR("%s malloc srv_psm_arr failed\n", __func__);
ret = ESP_BT_L2CAP_NO_RESOURCE;
break;
}
osi_mutex_lock(&l2cap_local_param.l2cap_slot_mutex, OSI_MUTEX_MAX_TIMEOUT);
// [1] find all server
for (i = 1; i <= BTA_JV_MAX_L2C_CONN; i++) {
if (l2cap_local_param.l2cap_slots[i] != NULL && l2cap_local_param.l2cap_slots[i]->is_server &&
l2cap_local_param.l2cap_slots[i]->handle != 0xffff) {
if (is_remove_all) {
srv_psm_arr[srv_cnt++] = l2cap_local_param.l2cap_slots[i]->psm;
} else if (l2cap_local_param.l2cap_slots[i]->psm == arg->stop_srv.psm) {
srv_psm_arr[srv_cnt++] = l2cap_local_param.l2cap_slots[i]->psm;
break;
}
}
}
if (srv_cnt == 0) {
if (is_remove_all) {
BTC_TRACE_ERROR("%s can not find any server!\n", __func__);
} else {
BTC_TRACE_ERROR("%s can not find server:%d!\n", __func__, arg->stop_srv.psm);
}
ret = ESP_BT_L2CAP_NO_SERVER;
break;
}
// [2] remove all local related connection
for (j = 0; j < srv_cnt; j++) {
for (i = 1; i <= BTA_JV_MAX_L2C_CONN; i++) {
if (l2cap_local_param.l2cap_slots[i] != NULL && l2cap_local_param.l2cap_slots[i]->connected &&
l2cap_local_param.l2cap_slots[i]->handle != 0xffff &&
l2cap_local_param.l2cap_slots[i]->psm == srv_psm_arr[j]) {
BTA_JvL2capClose(l2cap_local_param.l2cap_slots[i]->handle, (tBTA_JV_L2CAP_CBACK *)btc_l2cap_inter_cb,
(void *)l2cap_local_param.l2cap_slots[i]->id);
}
}
}
// [3] remove all server
for (j = 0; j < srv_cnt; j++) {
for (i = 1; i <= BTA_JV_MAX_L2C_CONN; i++) {
if (l2cap_local_param.l2cap_slots[i] != NULL && l2cap_local_param.l2cap_slots[i]->is_server &&
l2cap_local_param.l2cap_slots[i]->handle != 0xffff &&
l2cap_local_param.l2cap_slots[i]->psm == srv_psm_arr[j]) {
if (l2cap_local_param.l2cap_slots[i]->handle > 0) {
BTA_JvL2capStopServer(l2cap_local_param.l2cap_slots[i]->psm,
(void *)l2cap_local_param.l2cap_slots[i]->id);
}
BTA_JvFreeChannel(l2cap_local_param.l2cap_slots[i]->psm, BTA_JV_CONN_TYPE_L2CAP,
(tBTA_JV_RFCOMM_CBACK *)btc_l2cap_inter_cb, (void *)l2cap_local_param.l2cap_slots[i]->id);
}
}
}
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
} while (0);
if (ret != ESP_BT_L2CAP_SUCCESS) {
esp_bt_l2cap_cb_param_t param;
param.srv_stop.status = ret;
param.srv_stop.psm = BTC_L2CAP_INVALID_PSM;
btc_l2cap_cb_to_app(ESP_BT_L2CAP_SRV_STOP_EVT, ¶m);
}
if (srv_psm_arr) {
osi_free(srv_psm_arr);
srv_psm_arr = NULL;
}
}
static void btc_l2cap_connect(btc_l2cap_args_t *arg)
{
esp_bt_l2cap_status_t ret = ESP_BT_L2CAP_SUCCESS;
tL2CAP_CFG_INFO cfg;
do {
if (!is_l2cap_init()) {
BTC_TRACE_ERROR("%s L2CAP have not been init\n", __func__);
ret = ESP_BT_L2CAP_NEED_INIT;
break;
}
osi_mutex_lock(&l2cap_local_param.l2cap_slot_mutex, OSI_MUTEX_MAX_TIMEOUT);
l2cap_slot_t *slot = l2cap_malloc_slot();
if (!slot) {
BTC_TRACE_ERROR("%s unable to malloc L2CAP slot!", __func__);
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
ret = ESP_BT_L2CAP_NO_RESOURCE;
break;
}
slot->security = arg->connect.sec_mask;
slot->role = BTC_L2CAP_ROLE_MASTER;
slot->psm = arg->connect.remote_psm;
memcpy(slot->addr, arg->connect.peer_bd_addr, ESP_BD_ADDR_LEN);
memset(&cfg, 0, sizeof(tL2CAP_CFG_INFO));
cfg.fcr_present = TRUE;
cfg.fcr = obex_l2c_fcr_opts_def;
BTA_JvL2capConnect(slot->security, slot->role, &obex_l2c_etm_opt, slot->psm,
L2CAP_MAX_SDU_LENGTH, &cfg, slot->addr, (tBTA_JV_L2CAP_CBACK *)btc_l2cap_inter_cb, (void *)slot->id);
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
} while (0);
if (ret != ESP_BT_L2CAP_SUCCESS) {
esp_bt_l2cap_cb_param_t param;
param.open.status = ret;
param.open.handle = 0;
param.open.fd = -1;
param.open.tx_mtu = 0;
memset(param.open.rem_bda, 0, ESP_BD_ADDR_LEN);
btc_l2cap_cb_to_app(ESP_BT_L2CAP_OPEN_EVT, ¶m);
}
}
static void btc_l2cap_write(uint32_t handle)
{
do {
if (!is_l2cap_init()) {
BTC_TRACE_ERROR("%s L2CAP have not been init\n", __func__);
break;
}
l2cap_slot_t *slot = NULL;
slot = l2cap_find_slot_by_handle(handle);
if (!slot || (slot && !slot->connected)) {
if (!slot) {
BTC_TRACE_ERROR("%s unable to find l2cap slot!", __func__);
} else {
BTC_TRACE_ERROR("%s l2cap has been disconnected already!", __func__);
}
break;
}
BT_HDR *p_buf;
if ((p_buf = fixed_queue_try_peek_first(slot->tx.queue)) != NULL && p_buf->layer_specific == 0) {
p_buf->event++;
p_buf->layer_specific = 1;
BTA_JvL2capWrite(handle, slot->id, p_buf->data + p_buf->offset, p_buf->len, (void *)slot->id);
}
} while (0);
}
static void btc_l2cap_disconnect(uint32_t handle)
{
esp_bt_l2cap_status_t ret = ESP_BT_L2CAP_SUCCESS;
do {
if (!is_l2cap_init()) {
BTC_TRACE_ERROR("%s L2CAP have not been init\n", __func__);
ret = ESP_BT_L2CAP_NEED_INIT;
break;
}
l2cap_slot_t *slot = NULL;
slot = l2cap_find_slot_by_handle(handle);
if (!slot || (slot && !slot->connected)) {
if (!slot) {
BTC_TRACE_ERROR("%s unable to find L2CAP slot! disconnect fail!", __func__);
} else {
BTC_TRACE_ERROR("%s L2CAP has been disconnected already!", __func__);
}
ret = ESP_BT_L2CAP_NO_CONNECTION;
break;
}
BTA_JvL2capClose(handle, (tBTA_JV_L2CAP_CBACK *)btc_l2cap_inter_cb, (void *)slot->id);
} while(0);
if (ret != ESP_BT_L2CAP_SUCCESS) {
esp_bt_l2cap_cb_param_t param;
param.close.status = ret;
param.close.handle = 0;
param.close.async = FALSE;
btc_l2cap_cb_to_app(ESP_BT_L2CAP_CLOSE_EVT, ¶m);
}
}
void btc_l2cap_call_handler(btc_msg_t *msg)
{
btc_l2cap_args_t *arg = (btc_l2cap_args_t *)(msg->arg);
switch (msg->act) {
case BTC_L2CAP_ACT_INIT:
btc_l2cap_init();
break;
case BTC_L2CAP_ACT_UNINIT:
btc_l2cap_uninit();
break;
case BTC_L2CAP_ACT_CONNECT:
btc_l2cap_connect(arg);
break;
case BTC_L2CAP_ACT_START_SRV:
btc_l2cap_start_srv(arg);
break;
case BTC_L2CAP_ACT_STOP_SRV:
btc_l2cap_stop_srv(arg);
break;
default:
BTC_TRACE_ERROR("%s: Unhandled event (%d)!\n", __FUNCTION__, msg->act);
break;
}
}
void btc_l2cap_cb_handler(btc_msg_t *msg)
{
esp_bt_l2cap_cb_param_t param;
tBTA_JV *p_data = (tBTA_JV *)msg->arg;
l2cap_slot_t *slot = NULL;
uint8_t event = msg->act;
uint8_t serial = 0;
uint32_t count = 0;
switch (event) {
case BTA_JV_ENABLE_EVT:
param.init.status = p_data->status;
btc_l2cap_cb_to_app(ESP_BT_L2CAP_INIT_EVT, ¶m);
break;
case BTA_JV_DISABLE_EVT:
param.uninit.status = ESP_BT_L2CAP_SUCCESS;
l2cap_free_pending_slots();
BTA_JvFree();
osi_mutex_free(&l2cap_local_param.l2cap_slot_mutex);
if (l2cap_local_param.tx_event_group) {
vEventGroupDelete(l2cap_local_param.tx_event_group);
l2cap_local_param.tx_event_group = NULL;
}
if (l2cap_local_param.l2cap_vfs_id != -1) {
esp_vfs_unregister_with_id(l2cap_local_param.l2cap_vfs_id);
l2cap_local_param.l2cap_vfs_id = -1;
}
#if L2CAP_DYNAMIC_MEMORY == TRUE
osi_free(l2cap_local_param_ptr);
l2cap_local_param_ptr = NULL;
#endif
btc_l2cap_cb_to_app(ESP_BT_L2CAP_UNINIT_EVT, ¶m);
break;
case BTA_JV_L2CAP_OPEN_EVT:
do {
osi_mutex_lock(&l2cap_local_param.l2cap_slot_mutex, OSI_MUTEX_MAX_TIMEOUT);
slot = l2cap_find_slot_by_handle(p_data->l2c_open.handle);
if (!slot) {
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
BTC_TRACE_ERROR("%s unable to find L2CAP slot, event:%d!", __func__, event);
param.open.status = ESP_BT_L2CAP_NO_CONNECTION;
break;
}
param.open.fd = slot->fd;
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
param.open.status = p_data->l2c_open.status;
} while (0);
param.open.handle = p_data->l2c_open.handle;
param.open.tx_mtu = p_data->l2c_open.tx_mtu;
memcpy(param.open.rem_bda, p_data->l2c_open.rem_bda, ESP_BD_ADDR_LEN);
btc_l2cap_cb_to_app(ESP_BT_L2CAP_OPEN_EVT, ¶m);
break;
case BTA_JV_L2CAP_CLOSE_EVT:
param.close.status = p_data->l2c_close.status;
param.close.handle = p_data->l2c_close.handle;
param.close.async = p_data->l2c_close.async;
bool need_call = true;
do {
osi_mutex_lock(&l2cap_local_param.l2cap_slot_mutex, OSI_MUTEX_MAX_TIMEOUT);
uint32_t id = (uintptr_t)p_data->l2c_close.user_data;
slot = l2cap_find_slot_by_id(id);
if (!slot) {
param.close.status = ESP_BT_L2CAP_NO_CONNECTION;
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
BTC_TRACE_ERROR("%s unable to find RFCOMM slot, event:%d!", __func__, event);
break;
}
// if rx still has data, delay free slot
if (slot->close_alarm == NULL && slot->rx.queue && fixed_queue_length(slot->rx.queue) > 0) {
tBTA_JV *p_arg = NULL;
if ((p_arg = osi_malloc(sizeof(tBTA_JV))) == NULL) {
param.close.status = ESP_BT_L2CAP_NO_RESOURCE;
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
BTC_TRACE_ERROR("%s unable to malloc slot close_alarm arg!", __func__);
break;
}
memcpy(p_arg, p_data, sizeof(tBTA_JV));
slot->alarm_arg = (void *)p_arg;
if ((slot->close_alarm =
osi_alarm_new("slot", close_timeout_handler, (void *)slot, VFS_CLOSE_TIMEOUT)) == NULL) {
osi_free(p_arg);
slot->alarm_arg = NULL;
param.close.status = ESP_BT_L2CAP_NO_RESOURCE;
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
BTC_TRACE_ERROR("%s unable to malloc slot close_alarm!", __func__);
break;
}
if (osi_alarm_set(slot->close_alarm, VFS_CLOSE_TIMEOUT) != OSI_ALARM_ERR_PASS) {
osi_free(p_arg);
slot->alarm_arg = NULL;
osi_alarm_free(slot->close_alarm);
param.close.status = ESP_BT_L2CAP_BUSY;
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
BTC_TRACE_ERROR("%s set slot close_alarm failed!", __func__);
break;
}
BTC_TRACE_WARNING("%s slot rx data will be discard in %d milliseconds!",
__func__, VFS_CLOSE_TIMEOUT);
slot->connected = false;
need_call = false;
}
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
} while (0);
if (need_call) {
btc_l2cap_cb_to_app(ESP_BT_L2CAP_CLOSE_EVT, ¶m);
osi_mutex_lock(&l2cap_local_param.l2cap_slot_mutex, OSI_MUTEX_MAX_TIMEOUT);
l2cap_free_slot(slot);
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
}
break;
case BTA_JV_L2CAP_START_EVT:
param.start.status = p_data->l2c_start.status;
param.start.handle = p_data->l2c_start.handle;
param.start.sec_id = p_data->l2c_start.sec_id;
btc_l2cap_cb_to_app(ESP_BT_L2CAP_START_EVT, ¶m);
break;
case BTA_JV_L2CAP_CL_INIT_EVT:
param.cl_init.status = p_data->l2c_cl_init.status;
param.cl_init.handle = p_data->l2c_cl_init.handle;
param.cl_init.sec_id = p_data->l2c_cl_init.sec_id;
btc_l2cap_cb_to_app(ESP_BT_L2CAP_CL_INIT_EVT, ¶m);
break;
case BTA_JV_L2CAP_DATA_IND_EVT:
osi_mutex_lock(&l2cap_local_param.l2cap_slot_mutex, OSI_MUTEX_MAX_TIMEOUT);
slot = l2cap_find_slot_by_handle(p_data->data_ind.handle);
if (!slot) {
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
BTC_TRACE_ERROR("%s unable to find L2CAP slot, event:%d!", __func__, event);
break;
}
if (BTA_JvL2capReady(p_data->data_ind.handle, &count) == BTA_JV_SUCCESS && count > 0) {
BT_HDR *p_data_buf = osi_malloc(count + sizeof(BT_HDR));
if (p_data_buf == NULL) {
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
BTC_TRACE_ERROR("%s, %d count = %d malloc failed!", __func__, __LINE__, count);
break; // to do disconnect
}
memset(p_data_buf, 0, count + sizeof(BT_HDR));
p_data_buf->len = BTA_JvL2capRead(p_data->data_ind.handle, slot->id, p_data_buf->data, count);
if (p_data_buf->len > 0) {
fixed_queue_enqueue(slot->rx.queue, p_data_buf, FIXED_QUEUE_MAX_TIMEOUT);
} else {
osi_free(p_data_buf);
}
}
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
break;
case BTA_JV_L2CAP_CONG_EVT:
osi_mutex_lock(&l2cap_local_param.l2cap_slot_mutex, OSI_MUTEX_MAX_TIMEOUT);
slot = l2cap_find_slot_by_handle(p_data->l2c_cong.handle);
if (!slot) {
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
BTC_TRACE_ERROR("%s unable to find L2CAP slot, event:%d!", __func__, event);
break;
}
if (!p_data->l2c_cong.cong) {
BT_HDR *p_buf;
if ((p_buf = fixed_queue_try_peek_first(slot->tx.queue)) != NULL && p_buf->layer_specific == 0) {
p_buf->event++;
p_buf->layer_specific = 1;
BTA_JvL2capWrite(p_data->l2c_cong.handle, slot->id, p_buf->data + p_buf->offset, p_buf->len, (void *)slot->id);
}
}
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
break;
case BTA_JV_L2CAP_READ_EVT:
osi_mutex_lock(&l2cap_local_param.l2cap_slot_mutex, OSI_MUTEX_MAX_TIMEOUT);
slot = l2cap_find_slot_by_handle(p_data->l2c_read.handle);
if (!slot) {
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
BTC_TRACE_ERROR("%s unable to find L2CAP slot, event:%d!", __func__, event);
break;
}
if (BTA_JvL2capReady(p_data->l2c_read.handle, &count) == BTA_JV_SUCCESS && count > 0) {
BT_HDR *p_data_buf = osi_malloc(count + sizeof(BT_HDR));
if (p_data_buf == NULL) {
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
BTC_TRACE_ERROR("%s, %d count = %d malloc failed!", __func__, __LINE__, count);
break; // to do disconnect
}
memset(p_data_buf, 0, count + sizeof(BT_HDR));
p_data_buf->len = BTA_JvL2capRead(p_data->l2c_read.handle, slot->id, p_data_buf->data, count);
if (p_data_buf->len > 0) {
fixed_queue_enqueue(slot->rx.queue, p_data_buf, FIXED_QUEUE_MAX_TIMEOUT);
} else {
osi_free(p_data_buf);
}
}
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
break;
case BTA_JV_L2CAP_WRITE_EVT:
osi_mutex_lock(&l2cap_local_param.l2cap_slot_mutex, OSI_MUTEX_MAX_TIMEOUT);
slot = l2cap_find_slot_by_handle(p_data->l2c_write.handle);
if (!slot) {
BTC_TRACE_ERROR("%s unable to find L2CAP slot!, handle:%d", __func__, p_data->l2c_write.handle);
}
if (slot) {
BT_HDR *p_buf;
serial = slot->serial;
if ((p_buf = fixed_queue_try_peek_first(slot->tx.queue)) == NULL) {
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
break;
}
if (p_data->l2c_write.status == BTA_JV_SUCCESS) {
p_buf->len -= p_data->l2c_write.len;
p_buf->offset += p_data->l2c_write.len;
p_buf->layer_specific = 0;
if (p_buf->len == 0) {
osi_free(fixed_queue_dequeue(slot->tx.queue, FIXED_QUEUE_MAX_TIMEOUT));
if (fixed_queue_length(slot->tx.queue) <= SLOT_TX_QUEUE_LOW_WM) {
xEventGroupSetBits(l2cap_local_param.tx_event_group, SLOT_WRITE_BIT(serial));
}
}
if ((p_buf = fixed_queue_try_peek_first(slot->tx.queue)) != NULL && p_buf->layer_specific == 0 &&
!p_data->l2c_write.cong) {
p_buf->layer_specific = 1;
p_buf->event++;
BTA_JvL2capWrite(p_data->l2c_write.handle, slot->id, p_buf->data + p_buf->offset, p_buf->len, (void *)slot->id);
}
}
}
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
break;
case BTA_JV_FREE_SCN_EVT:
param.srv_stop.status = p_data->free_scn.status;
param.srv_stop.psm = p_data->free_scn.scn;
btc_l2cap_cb_to_app(ESP_BT_L2CAP_SRV_STOP_EVT, ¶m);
break;
default:
break;
}
return;
}
static ssize_t l2cap_vfs_write(int fd, const void * data, size_t size)
{
assert(data != NULL);
errno = 0;
if (size == 0) {
return 0;
}
if (!is_l2cap_init()) {
BTC_TRACE_ERROR("%s L2CAP have not been init\n", __func__);
errno = ESRCH;
return -1;
}
l2cap_slot_t *slot = NULL;
uint8_t serial = 0;
osi_mutex_lock(&l2cap_local_param.l2cap_slot_mutex, OSI_MUTEX_MAX_TIMEOUT);
slot = l2cap_find_slot_by_fd(fd);
if (!slot) {
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
BTC_TRACE_ERROR("%s unable to find L2CAP slot!", __func__);
errno = ENOENT;
return -1;
}
serial = slot->serial;
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
ssize_t sent = 0, write_size = 0;
size_t tx_len;
BT_HDR *p_buf = NULL;
bool enqueue_status= false;
EventBits_t tx_event_group_val = 0;
while (1) {
tx_event_group_val = 0;
if (size) {
if (p_buf == NULL) {
write_size = size < slot->tx_mtu ? size : slot->tx_mtu;
if ((p_buf = osi_malloc(sizeof(BT_HDR) + write_size)) == NULL) {
BTC_TRACE_ERROR("%s malloc failed!", __func__);
errno = ENOMEM;
sent = -1;
break;
}
p_buf->offset = 0;
p_buf->len = write_size;
p_buf->event = 0; // indicate the p_buf be sent count
p_buf->layer_specific = 0; // indicate the p_buf whether to be sent, 0 - ready to send; 1 - have sent
memcpy((UINT8 *)(p_buf + 1), data + sent, write_size);
}
} else {
break;
}
osi_mutex_lock(&l2cap_local_param.l2cap_slot_mutex, OSI_MUTEX_MAX_TIMEOUT);
if ((slot = l2cap_local_param.l2cap_slots[serial]) != NULL) {
tx_len = fixed_queue_length(slot->tx.queue);
enqueue_status = fixed_queue_enqueue(slot->tx.queue, p_buf, 0);
if (!enqueue_status) {
BTC_TRACE_DEBUG("%s tx_len:%d, fd:%d\n", __func__, fixed_queue_length(slot->tx.queue), fd);
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
//block until under water level, be closed or time out
tx_event_group_val =
xEventGroupWaitBits(l2cap_local_param.tx_event_group, SLOT_WRITE_BIT(serial) | SLOT_CLOSE_BIT(serial), pdTRUE,
pdFALSE, VFS_WRITE_TIMEOUT / portTICK_PERIOD_MS);
if (tx_event_group_val & SLOT_CLOSE_BIT(serial)) {
BTC_TRACE_ERROR("%s exit for L2CAP close, fd:%d!", __func__, fd);
errno = EPIPE;
sent = -1;
break;
} else if (tx_event_group_val & SLOT_WRITE_BIT(serial)) {
continue;
} else if (tx_event_group_val == 0) {
BTC_TRACE_ERROR("%s exit for time out, fd:%d!", __func__, fd);
errno = EBUSY;
sent = -1;
break;
}
}
if (tx_len == 0) {
btc_l2cap_write(slot->handle);
}
sent += write_size;
size -= write_size;
p_buf = NULL;
} else {
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
errno = EPIPE;
sent = -1;
break;
}
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
}
//errors occur, need to cleanup
if (p_buf) {
osi_free(p_buf);
p_buf = NULL;
}
return sent;
}
static int l2cap_vfs_close(int fd)
{
errno = 0;
if (!is_l2cap_init()) {
BTC_TRACE_ERROR("%s L2CAP have not been init\n", __func__);
errno = ESRCH;
return -1;
}
l2cap_slot_t *slot = NULL;
osi_mutex_lock(&l2cap_local_param.l2cap_slot_mutex, OSI_MUTEX_MAX_TIMEOUT);
slot = l2cap_find_slot_by_fd(fd);
if (!slot) {
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
BTC_TRACE_ERROR("%s unable to find L2CAP slot!", __func__);
errno = ENOENT;
return -1;
}
btc_l2cap_disconnect(slot->handle);
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
return 0;
}
static ssize_t l2cap_vfs_read(int fd, void * dst, size_t size)
{
assert(dst != NULL);
errno = 0;
if (!is_l2cap_init()) {
BTC_TRACE_ERROR("%s L2CAP have not been init\n", __func__);
errno = ESRCH;
return -1;
}
l2cap_slot_t *slot = NULL;
uint8_t serial = 0;
osi_mutex_lock(&l2cap_local_param.l2cap_slot_mutex, OSI_MUTEX_MAX_TIMEOUT);
slot = l2cap_find_slot_by_fd(fd);
if (!slot) {
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
BTC_TRACE_ERROR("%s unable to find L2CAP slot!", __func__);
errno = ENOENT;
return -1;
}
serial = slot->serial;
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
ssize_t item_size = 0;
BT_HDR *p_buf;
while (1) {
osi_mutex_lock(&l2cap_local_param.l2cap_slot_mutex, OSI_MUTEX_MAX_TIMEOUT);
if ((slot = l2cap_local_param.l2cap_slots[serial]) != NULL) {
if (fixed_queue_length(slot->rx.queue) > 0) {
// free unused p_buf
if ((p_buf = (BT_HDR *)fixed_queue_try_peek_first(slot->rx.queue)) != NULL && p_buf->len == 0) {
osi_free(fixed_queue_dequeue(slot->rx.queue, FIXED_QUEUE_MAX_TIMEOUT));
p_buf = NULL;
}
if (size == 0 || (p_buf = (BT_HDR *)fixed_queue_try_peek_first(slot->rx.queue)) == NULL) {
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
break;
}
} else {
/**
* If close_alarm is not NULL, it means that we have received the BTA_JV_L2CAP_CLOSE_EVT.
* And we can trigger close_alarm immediately.
*/
if (slot->close_alarm && osi_alarm_is_active(slot->close_alarm)) {
osi_alarm_cancel(slot->close_alarm);
osi_alarm_set(slot->close_alarm, 0);
}
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
break;
}
} else {
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
BTC_TRACE_ERROR("%s peer close, data will be discarded!\n", __func__);
errno = EPIPE;
item_size = -1;
break;
}
osi_mutex_unlock(&l2cap_local_param.l2cap_slot_mutex);
if (p_buf->len <= size) {
memcpy(dst, p_buf->data + p_buf->offset, p_buf->len);
size -= p_buf->len;
item_size += p_buf->len;
dst += p_buf->len;
p_buf->offset += p_buf->len;
p_buf->len = 0; // indicate the p_buf is unused
} else {
memcpy(dst, p_buf->data + p_buf->offset, size);
item_size += size;
p_buf->offset += size;
p_buf->len -= size;
size = 0;
}
}
return item_size;
}
esp_err_t btc_l2cap_vfs_register(void)
{
esp_err_t ret = ESP_OK;
do {
if (!is_l2cap_init()) {
BTC_TRACE_ERROR("%s L2CAP have not been init\n", __func__);
ret = ESP_FAIL;
break;
}
esp_vfs_t vfs = {
.flags = ESP_VFS_FLAG_DEFAULT,
.write = l2cap_vfs_write,
.open = NULL,
.fstat = NULL,
.close = l2cap_vfs_close,
.read = l2cap_vfs_read,
.fcntl = NULL
};
// No FD range is registered here: l2cap_vfs_id is used to register/unregister
// file descriptors
if (esp_vfs_register_with_id(&vfs, NULL, &l2cap_local_param.l2cap_vfs_id) != ESP_OK) {
ret = ESP_FAIL;
break;
}
} while (0);
return ret;
}
esp_err_t btc_l2cap_vfs_unregister(void)
{
esp_err_t ret = ESP_OK;
do {
if (!is_l2cap_init()) {
BTC_TRACE_ERROR("%s L2CAP have not been init\n", __func__);
ret = ESP_FAIL;
break;
}
if (l2cap_local_param.l2cap_vfs_id != -1) {
if (esp_vfs_unregister_with_id(l2cap_local_param.l2cap_vfs_id) != ESP_OK) {
ret = ESP_FAIL;
}
}
l2cap_local_param.l2cap_vfs_id = -1;
} while (0);
return ret;
}
#endif ///defined BTC_L2CAP_INCLUDED && BTC_L2CAP_INCLUDED == TRUE
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