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/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2013-2014 Intel Corporation. All rights reserved.
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdbool.h>
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/signalfd.h>
#if defined(ANDROID)
#include <sys/capability.h>
#include <linux/prctl.h>
#endif
#include <glib.h>
#include "src/log.h"
#include "src/sdpd.h"
#include "lib/bluetooth.h"
#include "ipc-common.h"
#include "ipc.h"
#include "bluetooth.h"
#include "socket.h"
#include "hidhost.h"
#include "hal-msg.h"
#include "a2dp.h"
#include "pan.h"
#include "avrcp.h"
#include "handsfree.h"
#include "gatt.h"
#include "health.h"
#define STARTUP_GRACE_SECONDS 5
#define SHUTDOWN_GRACE_SECONDS 10
static guint bluetooth_start_timeout = 0;
static bdaddr_t adapter_bdaddr;
static GMainLoop *event_loop;
static struct ipc *hal_ipc = NULL;
static bool services[HAL_SERVICE_ID_MAX + 1] = { false };
static void service_register(const void *buf, uint16_t len)
{
const struct hal_cmd_register_module *m = buf;
uint8_t status;
if (m->service_id > HAL_SERVICE_ID_MAX || services[m->service_id]) {
status = HAL_STATUS_FAILED;
goto failed;
}
switch (m->service_id) {
case HAL_SERVICE_ID_BLUETOOTH:
if (!bt_bluetooth_register(hal_ipc, m->mode)) {
status = HAL_STATUS_FAILED;
goto failed;
}
break;
case HAL_SERVICE_ID_SOCKET:
bt_socket_register(hal_ipc, &adapter_bdaddr, m->mode);
break;
case HAL_SERVICE_ID_HIDHOST:
if (!bt_hid_register(hal_ipc, &adapter_bdaddr, m->mode)) {
status = HAL_STATUS_FAILED;
goto failed;
}
break;
case HAL_SERVICE_ID_A2DP:
if (!bt_a2dp_register(hal_ipc, &adapter_bdaddr, m->mode)) {
status = HAL_STATUS_FAILED;
goto failed;
}
break;
case HAL_SERVICE_ID_PAN:
if (!bt_pan_register(hal_ipc, &adapter_bdaddr, m->mode)) {
status = HAL_STATUS_FAILED;
goto failed;
}
break;
case HAL_SERVICE_ID_AVRCP:
if (!bt_avrcp_register(hal_ipc, &adapter_bdaddr, m->mode)) {
status = HAL_STATUS_FAILED;
goto failed;
}
break;
case HAL_SERVICE_ID_HANDSFREE:
if (!bt_handsfree_register(hal_ipc, &adapter_bdaddr, m->mode)) {
status = HAL_STATUS_FAILED;
goto failed;
}
break;
case HAL_SERVICE_ID_GATT:
if (!bt_gatt_register(hal_ipc, &adapter_bdaddr)) {
status = HAL_STATUS_FAILED;
goto failed;
}
break;
case HAL_SERVICE_ID_HEALTH:
if (!bt_health_register(hal_ipc, &adapter_bdaddr, m->mode)) {
status = HAL_STATUS_FAILED;
goto failed;
}
break;
default:
DBG("service %u not supported", m->service_id);
status = HAL_STATUS_FAILED;
goto failed;
}
services[m->service_id] = true;
status = HAL_STATUS_SUCCESS;
info("Service ID=%u registered", m->service_id);
failed:
ipc_send_rsp(hal_ipc, HAL_SERVICE_ID_CORE, HAL_OP_REGISTER_MODULE,
status);
}
static void service_unregister(const void *buf, uint16_t len)
{
const struct hal_cmd_unregister_module *m = buf;
uint8_t status;
if (m->service_id > HAL_SERVICE_ID_MAX || !services[m->service_id]) {
status = HAL_STATUS_FAILED;
goto failed;
}
switch (m->service_id) {
case HAL_SERVICE_ID_BLUETOOTH:
bt_bluetooth_unregister();
break;
case HAL_SERVICE_ID_SOCKET:
bt_socket_unregister();
break;
case HAL_SERVICE_ID_HIDHOST:
bt_hid_unregister();
break;
case HAL_SERVICE_ID_A2DP:
bt_a2dp_unregister();
break;
case HAL_SERVICE_ID_PAN:
bt_pan_unregister();
break;
case HAL_SERVICE_ID_AVRCP:
bt_avrcp_unregister();
break;
case HAL_SERVICE_ID_HANDSFREE:
bt_handsfree_unregister();
break;
case HAL_SERVICE_ID_GATT:
bt_gatt_unregister();
break;
case HAL_SERVICE_ID_HEALTH:
bt_health_unregister();
break;
default:
/*
* This would indicate bug in HAL, as unregister should not be
* called in init failed
*/
DBG("service %u not supported", m->service_id);
status = HAL_STATUS_FAILED;
goto failed;
}
services[m->service_id] = false;
status = HAL_STATUS_SUCCESS;
info("Service ID=%u unregistered", m->service_id);
failed:
ipc_send_rsp(hal_ipc, HAL_SERVICE_ID_CORE, HAL_OP_UNREGISTER_MODULE,
status);
}
static const struct ipc_handler cmd_handlers[] = {
/* HAL_OP_REGISTER_MODULE */
{ service_register, false, sizeof(struct hal_cmd_register_module) },
/* HAL_OP_UNREGISTER_MODULE */
{ service_unregister, false, sizeof(struct hal_cmd_unregister_module) },
};
static void bluetooth_stopped(void)
{
g_main_loop_quit(event_loop);
}
static gboolean quit_eventloop(gpointer user_data)
{
g_main_loop_quit(event_loop);
return FALSE;
}
static void stop_bluetooth(void)
{
static bool __stop = false;
if (__stop)
return;
__stop = true;
if (!bt_bluetooth_stop(bluetooth_stopped)) {
g_main_loop_quit(event_loop);
return;
}
g_timeout_add_seconds(SHUTDOWN_GRACE_SECONDS, quit_eventloop, NULL);
}
static void ipc_disconnected(void *data)
{
stop_bluetooth();
}
static void adapter_ready(int err, const bdaddr_t *addr)
{
if (err < 0) {
error("Adapter initialization failed: %s", strerror(-err));
exit(EXIT_FAILURE);
}
bacpy(&adapter_bdaddr, addr);
if (bluetooth_start_timeout > 0) {
g_source_remove(bluetooth_start_timeout);
bluetooth_start_timeout = 0;
}
info("Adapter initialized");
hal_ipc = ipc_init(BLUEZ_HAL_SK_PATH, sizeof(BLUEZ_HAL_SK_PATH),
HAL_SERVICE_ID_MAX, true,
ipc_disconnected, NULL);
if (!hal_ipc) {
error("Failed to initialize IPC");
exit(EXIT_FAILURE);
}
ipc_register(hal_ipc, HAL_SERVICE_ID_CORE, cmd_handlers,
G_N_ELEMENTS(cmd_handlers));
}
static gboolean signal_handler(GIOChannel *channel, GIOCondition cond,
gpointer user_data)
{
static bool __terminated = false;
struct signalfd_siginfo si;
ssize_t result;
int fd;
if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP))
return FALSE;
fd = g_io_channel_unix_get_fd(channel);
result = read(fd, &si, sizeof(si));
if (result != sizeof(si))
return FALSE;
switch (si.ssi_signo) {
case SIGINT:
case SIGTERM:
if (!__terminated) {
info("Terminating");
stop_bluetooth();
}
__terminated = true;
break;
}
return TRUE;
}
static guint setup_signalfd(void)
{
GIOChannel *channel;
guint source;
sigset_t mask;
int fd;
sigemptyset(&mask);
sigaddset(&mask, SIGINT);
sigaddset(&mask, SIGTERM);
if (sigprocmask(SIG_BLOCK, &mask, NULL) < 0) {
perror("Failed to set signal mask");
return 0;
}
fd = signalfd(-1, &mask, 0);
if (fd < 0) {
perror("Failed to create signal descriptor");
return 0;
}
channel = g_io_channel_unix_new(fd);
g_io_channel_set_close_on_unref(channel, TRUE);
g_io_channel_set_encoding(channel, NULL, NULL);
g_io_channel_set_buffered(channel, FALSE);
source = g_io_add_watch(channel,
G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
signal_handler, NULL);
g_io_channel_unref(channel);
return source;
}
static gboolean option_version = FALSE;
static gint option_index = -1;
static gboolean option_dbg = FALSE;
static gboolean option_mgmt_dbg = FALSE;
static GOptionEntry options[] = {
{ "version", 'v', 0, G_OPTION_ARG_NONE, &option_version,
"Show version information and exit", NULL },
{ "index", 'i', 0, G_OPTION_ARG_INT, &option_index,
"Use specified controller", "INDEX"},
{ "debug", 'd', 0, G_OPTION_ARG_NONE, &option_dbg,
"Enable debug logs", NULL},
{ "mgmt-debug", 0, 0, G_OPTION_ARG_NONE, &option_mgmt_dbg,
"Enable mgmt debug logs", NULL},
{ NULL }
};
static void cleanup_services(void)
{
int i;
DBG("");
for (i = HAL_SERVICE_ID_BLUETOOTH; i < HAL_SERVICE_ID_MAX + 1; i++) {
if (!services[i])
continue;
switch (i) {
case HAL_SERVICE_ID_BLUETOOTH:
bt_bluetooth_unregister();
break;
case HAL_SERVICE_ID_SOCKET:
bt_socket_unregister();
break;
case HAL_SERVICE_ID_HIDHOST:
bt_hid_unregister();
break;
case HAL_SERVICE_ID_A2DP:
bt_a2dp_unregister();
break;
case HAL_SERVICE_ID_AVRCP:
bt_avrcp_unregister();
break;
case HAL_SERVICE_ID_PAN:
bt_pan_unregister();
break;
case HAL_SERVICE_ID_HANDSFREE:
bt_handsfree_unregister();
break;
case HAL_SERVICE_ID_GATT:
bt_gatt_unregister();
break;
case HAL_SERVICE_ID_HEALTH:
bt_health_unregister();
break;
}
services[i] = false;
}
}
static bool set_capabilities(void)
{
#if defined(ANDROID)
struct __user_cap_header_struct header;
struct __user_cap_data_struct cap;
header.version = _LINUX_CAPABILITY_VERSION;
header.pid = 0;
/*
* CAP_NET_ADMIN: Allow use of MGMT interface
* CAP_NET_BIND_SERVICE: Allow use of privileged PSM
* CAP_NET_RAW: Allow use of bnep ioctl calls
*/
cap.effective = cap.permitted =
CAP_TO_MASK(CAP_NET_RAW) |
CAP_TO_MASK(CAP_NET_ADMIN) |
CAP_TO_MASK(CAP_NET_BIND_SERVICE);
cap.inheritable = 0;
/* don't clear capabilities when dropping root */
if (prctl(PR_SET_KEEPCAPS, 1) < 0) {
error("%s: prctl(): %s", __func__, strerror(errno));
return false;
}
/* Android bluetooth user UID=1002 */
if (setuid(1002) < 0) {
error("%s: setuid(): %s", __func__, strerror(errno));
return false;
}
/* TODO: Move to cap_set_proc once bionic support it */
if (capset(&header, &cap) < 0) {
error("%s: capset(): %s", __func__, strerror(errno));
return false;
}
/* TODO: Move to cap_get_proc once bionic support it */
if (capget(&header, &cap) < 0) {
error("%s: capget(): %s", __func__, strerror(errno));
return false;
}
DBG("Caps: eff: 0x%x, perm: 0x%x, inh: 0x%x", cap.effective,
cap.permitted, cap.inheritable);
#endif
return true;
}
int main(int argc, char *argv[])
{
GOptionContext *context;
GError *err = NULL;
guint signal;
context = g_option_context_new(NULL);
g_option_context_add_main_entries(context, options, NULL);
if (g_option_context_parse(context, &argc, &argv, &err) == FALSE) {
if (err != NULL) {
g_printerr("%s\n", err->message);
g_error_free(err);
} else
g_printerr("An unknown error occurred\n");
exit(EXIT_FAILURE);
}
g_option_context_free(context);
if (option_version == TRUE) {
printf("%s\n", VERSION);
exit(EXIT_SUCCESS);
}
signal = setup_signalfd();
if (!signal)
return EXIT_FAILURE;
if (option_dbg || option_mgmt_dbg)
__btd_log_init("*", 0);
else
__btd_log_init(NULL, 0);
if (!set_capabilities()) {
__btd_log_cleanup();
g_source_remove(signal);
return EXIT_FAILURE;
}
bluetooth_start_timeout = g_timeout_add_seconds(STARTUP_GRACE_SECONDS,
quit_eventloop, NULL);
if (bluetooth_start_timeout == 0) {
error("Failed to init startup timeout");
__btd_log_cleanup();
g_source_remove(signal);
return EXIT_FAILURE;
}
if (!bt_bluetooth_start(option_index, option_mgmt_dbg, adapter_ready)) {
__btd_log_cleanup();
g_source_remove(bluetooth_start_timeout);
g_source_remove(signal);
return EXIT_FAILURE;
}
/* Use params: mtu = 0, flags = 0 */
start_sdp_server(0, 0);
DBG("Entering main loop");
event_loop = g_main_loop_new(NULL, FALSE);
g_main_loop_run(event_loop);
g_source_remove(signal);
if (bluetooth_start_timeout > 0)
g_source_remove(bluetooth_start_timeout);
cleanup_services();
stop_sdp_server();
bt_bluetooth_cleanup();
g_main_loop_unref(event_loop);
/* If no adapter was initialized, hal_ipc is NULL */
if (hal_ipc) {
ipc_unregister(hal_ipc, HAL_SERVICE_ID_CORE);
ipc_cleanup(hal_ipc);
}
info("Exit");
__btd_log_cleanup();
return EXIT_SUCCESS;
}