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zmk/app/src/ble.c

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/*
* Copyright (c) 2020 The ZMK Contributors
*
* SPDX-License-Identifier: MIT
*/
#include <device.h>
#include <init.h>
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <settings/settings.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/conn.h>
#include <bluetooth/hci.h>
#include <bluetooth/uuid.h>
#include <bluetooth/gatt.h>
#include <bluetooth/hci_err.h>
#if IS_ENABLED(CONFIG_SETTINGS)
#include <settings/settings.h>
#endif
#include <logging/log.h>
LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
#include <zmk/keys.h>
#include <zmk/split/bluetooth/uuid.h>
static struct bt_conn *auth_passkey_entry_conn;
static u8_t passkey_entries[6] = {0, 0, 0, 0, 0, 0};
static u8_t passkey_digit = 0;
#define ZMK_BT_LE_ADV_PARAM_INIT(_id, _options, _int_min, _int_max, _peer) \
{ \
.id = _id, \
.sid = 0, \
.secondary_max_skip = 0, \
.options = (_options), \
.interval_min = (_int_min), \
.interval_max = (_int_max), \
.peer = (_peer), \
}
#define ZMK_BT_LE_ADV_PARAM(_id, _options, _int_min, _int_max, _peer) \
((struct bt_le_adv_param[]) { \
ZMK_BT_LE_ADV_PARAM_INIT(_id, _options, _int_min, _int_max, _peer) \
})
#if IS_ENABLED(CONFIG_ZMK_SPLIT_BLE_ROLE_CENTRAL)
#define ZMK_ADV_PARAMS(_id) ZMK_BT_LE_ADV_PARAM(_id, \
BT_LE_ADV_OPT_CONNECTABLE | \
BT_LE_ADV_OPT_ONE_TIME | \
BT_LE_ADV_OPT_USE_NAME, \
BT_GAP_ADV_FAST_INT_MIN_2, \
BT_GAP_ADV_FAST_INT_MAX_2, NULL)
#else
#define ZMK_ADV_PARAMS(_id) ZMK_BT_LE_ADV_PARAM(_id, \
BT_LE_ADV_OPT_CONNECTABLE | \
BT_LE_ADV_OPT_USE_NAME, \
BT_GAP_ADV_FAST_INT_MIN_2, \
BT_GAP_ADV_FAST_INT_MAX_2, NULL)
#endif
static const struct bt_data zmk_ble_ad[] = {
BT_DATA_BYTES(BT_DATA_FLAGS, (BT_LE_AD_GENERAL | BT_LE_AD_NO_BREDR)),
BT_DATA_BYTES(BT_DATA_UUID16_SOME,
#if !IS_ENABLED(CONFIG_ZMK_SPLIT_BLE_ROLE_PERIPHERAL)
0x12, 0x18, /* HID Service */
#endif
0x0f, 0x18 /* Battery Service */
),
#if IS_ENABLED(CONFIG_ZMK_SPLIT_BLE_ROLE_PERIPHERAL)
BT_DATA_BYTES(BT_DATA_UUID128_ALL,
ZMK_SPLIT_BT_SERVICE_UUID)
#endif
};
#if IS_ENABLED(CONFIG_ZMK_SPLIT_BLE_ROLE_CENTRAL)
static bt_addr_le_t peripheral_addr;
#endif /* IS_ENABLED(CONFIG_ZMK_SPLIT_BLE_ROLE_CENTRAL) */
int zmk_ble_adv_pause()
{
int err = bt_le_adv_stop();
if (err) {
LOG_ERR("Failed to stop advertising (err %d)", err);
return err;
}
return 0;
};
int zmk_ble_adv_resume()
{
struct bt_le_adv_param *adv_params = ZMK_ADV_PARAMS(BT_ID_DEFAULT);
LOG_DBG("");
int err = bt_le_adv_start(adv_params, zmk_ble_ad, ARRAY_SIZE(zmk_ble_ad), NULL, 0);
if (err)
{
LOG_ERR("Advertising failed to start (err %d)", err);
return err;
}
return 0;
};
static void disconnect_host_connection(struct bt_conn *conn, void *arg)
{
struct bt_conn_info info;
bt_conn_get_info(conn, &info);
if (info.role != BT_CONN_ROLE_SLAVE) {
return;
}
bt_conn_disconnect(conn, BT_HCI_ERR_LOCALHOST_TERM_CONN);
};
static void unpair_non_peripheral_bonds(const struct bt_bond_info *info, void *user_data) {
char addr[BT_ADDR_LE_STR_LEN];
bt_addr_le_to_str(&info->addr, addr, sizeof(addr));
#if IS_ENABLED(CONFIG_ZMK_SPLIT_BLE_ROLE_CENTRAL)
if (!bt_addr_le_cmp(&info->addr, &peripheral_addr)) {
LOG_DBG("Skipping unpairing peripheral %s", log_strdup(addr));
return;
}
#endif /* IS_ENABLED(CONFIG_ZMK_SPLIT_BLE_ROLE_CENTRAL) */
LOG_DBG("Unpairing %s", log_strdup(addr));
bt_unpair(BT_ID_DEFAULT, &info->addr);
}
int zmk_ble_clear_bonds()
{
LOG_DBG("");
bt_conn_foreach(BT_ID_DEFAULT, disconnect_host_connection, NULL);
bt_foreach_bond(BT_ID_DEFAULT, unpair_non_peripheral_bonds, NULL);
return 0;
};
#if IS_ENABLED(CONFIG_ZMK_SPLIT_BLE_ROLE_CENTRAL)
void zmk_ble_set_peripheral_addr(bt_addr_le_t *addr)
{
memcpy(&peripheral_addr, addr, sizeof(bt_addr_le_t));
settings_save_one("ble/peripheral_address", addr, sizeof(bt_addr_le_t));
}
#endif /* IS_ENABLED(CONFIG_ZMK_SPLIT_BLE_ROLE_CENTRAL) */
#if IS_ENABLED(CONFIG_SETTINGS)
static int ble_profiles_handle_set(const char *name, size_t len, settings_read_cb read_cb, void *cb_arg)
{
const char *next;
LOG_DBG("Setting BLE value %s", log_strdup(name));
#if IS_ENABLED(CONFIG_ZMK_SPLIT_BLE_ROLE_CENTRAL)
if (settings_name_steq(name, "peripheral_address", &next) && !next) {
if (len != sizeof(bt_addr_le_t)) {
return -EINVAL;
}
int err = read_cb(cb_arg, &peripheral_addr, sizeof(bt_addr_le_t));
if (err <= 0) {
LOG_ERR("Failed to handle peripheral address from settings (err %d)", err);
return err;
}
}
#endif
return 0;
};
struct settings_handler profiles_handler = {
.name = "ble",
.h_set = ble_profiles_handle_set
};
#endif /* IS_ENABLED(CONFIG_SETTINGS) */
static void connected(struct bt_conn *conn, u8_t err)
{
char addr[BT_ADDR_LE_STR_LEN];
bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));
if (err)
{
LOG_WRN("Failed to connect to %s (%u)", log_strdup(addr), err);
return;
}
LOG_DBG("Connected %s", log_strdup(addr));
bt_conn_le_param_update(conn, BT_LE_CONN_PARAM(0x0006, 0x000c, 30, 400));
#if IS_ENABLED(CONFIG_ZMK_SPLIT_BLE_ROLE_PERIPHERAL)
bt_conn_le_phy_update(conn, BT_CONN_LE_PHY_PARAM_2M);
#endif
if (bt_conn_set_security(conn, BT_SECURITY_L2))
{
LOG_ERR("Failed to set security");
}
}
static void disconnected(struct bt_conn *conn, u8_t reason)
{
char addr[BT_ADDR_LE_STR_LEN];
bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));
LOG_DBG("Disconnected from %s (reason 0x%02x)", log_strdup(addr), reason);
#if IS_ENABLED(CONFIG_ZMK_SPLIT_BLE_ROLE_CENTRAL)
if (bt_addr_le_cmp(&peripheral_addr, BT_ADDR_LE_ANY) && bt_addr_le_cmp(&peripheral_addr, bt_conn_get_dst(conn))) {
zmk_ble_adv_resume();
}
#else
zmk_ble_adv_resume();
#endif
}
static void security_changed(struct bt_conn *conn, bt_security_t level,
enum bt_security_err err)
{
char addr[BT_ADDR_LE_STR_LEN];
bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));
if (!err)
{
LOG_DBG("Security changed: %s level %u", log_strdup(addr), level);
}
else
{
LOG_ERR("Security failed: %s level %u err %d", log_strdup(addr), level,
err);
}
}
static struct bt_conn_cb conn_callbacks = {
.connected = connected,
.disconnected = disconnected,
.security_changed = security_changed,
};
static void auth_passkey_display(struct bt_conn *conn, unsigned int passkey)
{
char addr[BT_ADDR_LE_STR_LEN];
bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));
LOG_DBG("Passkey for %s: %06u", log_strdup(addr), passkey);
}
#ifdef CONFIG_ZMK_BLE_PASSKEY_ENTRY
static void auth_passkey_entry(struct bt_conn *conn)
{
char addr[BT_ADDR_LE_STR_LEN];
bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));
LOG_DBG("Passkey entry requested for %s", log_strdup(addr));
auth_passkey_entry_conn = bt_conn_ref(conn);
}
#endif
static void auth_cancel(struct bt_conn *conn)
{
char addr[BT_ADDR_LE_STR_LEN];
bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));
if (auth_passkey_entry_conn)
{
bt_conn_unref(auth_passkey_entry_conn);
auth_passkey_entry_conn = NULL;
}
passkey_digit = 0;
LOG_DBG("Pairing cancelled: %s", log_strdup(addr));
}
static struct bt_conn_auth_cb zmk_ble_auth_cb_display = {
// .passkey_display = auth_passkey_display,
#ifdef CONFIG_ZMK_BLE_PASSKEY_ENTRY
.passkey_entry = auth_passkey_entry,
#endif
.cancel = auth_cancel,
};
static void zmk_ble_ready(int err)
{
LOG_DBG("ready? %d", err);
if (err)
{
LOG_ERR("Bluetooth init failed (err %d)", err);
return;
}
zmk_ble_adv_resume();
}
static int zmk_ble_init(struct device *_arg)
{
int err = bt_enable(NULL);
if (err)
{
LOG_ERR("BLUETOOTH FAILED (%d)", err);
return err;
}
#if IS_ENABLED(CONFIG_SETTINGS)
settings_subsys_init();
err = settings_register(&profiles_handler);
if (err) {
LOG_ERR("Failed to setup the profile settings handler (err %d)", err);
return err;
}
settings_load();
#endif
#if IS_ENABLED(CONFIG_ZMK_BLE_CLEAR_BONDS_ON_START)
settings_delete("bt/name");
for (int i = 0; i < 10; i++) {
bt_unpair(i, NULL);
}
#endif
bt_conn_cb_register(&conn_callbacks);
bt_conn_auth_cb_register(&zmk_ble_auth_cb_display);
zmk_ble_ready(0);
return 0;
}
int zmk_ble_unpair_all()
{
int resp = 0;
for (int i = BT_ID_DEFAULT; i < CONFIG_BT_ID_MAX; i++) {
int err = bt_unpair(BT_ID_DEFAULT, NULL);
if (err) {
resp = err;
LOG_ERR("Failed to unpair devices (err %d)", err);
}
}
return resp;
};
bool zmk_ble_handle_key_user(struct zmk_key_event *key_event)
{
zmk_key key = key_event->key;
if (!auth_passkey_entry_conn)
{
return true;
}
if (key < NUM_1 || key > NUM_0)
{
return true;
}
u32_t val = (key == NUM_0) ? 0 : (key - NUM_1 + 1);
passkey_entries[passkey_digit++] = val;
if (passkey_digit == 6)
{
u32_t passkey = 0;
for (int i = 5; i >= 0; i--)
{
passkey = (passkey * 10) + val;
}
bt_conn_auth_passkey_entry(auth_passkey_entry_conn, passkey);
bt_conn_unref(auth_passkey_entry_conn);
auth_passkey_entry_conn = NULL;
}
return false;
}
SYS_INIT(zmk_ble_init,
APPLICATION,
CONFIG_ZMK_BLE_INIT_PRIORITY);