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/*
* Copyright (c) 2015, The Linux Foundation. All rights reserved.
*
* Not a Contribution.
* Copyright 2008, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#define LOG_TAG "WifiFST"
#include "cutils/log.h"
#include "cutils/properties.h"
#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
#include <sys/_system_properties.h>
#include "hardware_legacy/wifi.h"
#ifndef WIFI_FST_DRIVER_MODULE_PATH
#define WIFI_FST_DRIVER_MODULE_PATH ""
#endif
#ifndef WIFI_FST_DRIVER_MODULE_ARG
#define WIFI_FST_DRIVER_MODULE_ARG ""
#endif
#ifndef WIFI_FST_DRIVER_MODULE_NAME
#define WIFI_FST_DRIVER_MODULE_NAME ""
#endif
static const char WIFI_FST_DRIVER_MODULE_TAG[] = WIFI_FST_DRIVER_MODULE_NAME " ";
static const char FST_DRIVER_PROP_NAME[] = "wlan.fst.driver.status";
static const char SUPPLICANT_GLOBAL_CTRL_IFACE[] = "@android:wpa_wlan0";
static const char FSTMAN_NAME[] = "fstman";
static const char FSTMAN_START_PROP_NAME[] = "netd.fstman.start";
static const char FSTMAN_PROP_NAME[] = "init.svc.fstman";
static const char FSTMAN_CONFIG_TEMPLATE[] = "/system/etc/wifi/fstman.ini";
static const char FSTMAN_CONFIG_FILE[] = "/data/misc/wifi/fstman.ini";
static const char FST_RATE_UPGRADE_ENABLED_PROP_NAME[] = "persist.fst.rate.upgrade.en";
static const char FST_SOFTAP_ENABLED_PROP_NAME[] = "persist.fst.softap.en";
static const char MODULE_FILE[] = "/proc/modules";
int is_fst_enabled()
{
char prop_value[PROPERTY_VALUE_MAX] = { '\0' };
if (property_get(FST_RATE_UPGRADE_ENABLED_PROP_NAME, prop_value, NULL) &&
strcmp(prop_value, "1") == 0) {
return 1;
}
return 0;
}
int is_fst_softap_enabled() {
char prop_value[PROPERTY_VALUE_MAX] = { '\0' };
if (is_fst_enabled() &&
property_get(FST_SOFTAP_ENABLED_PROP_NAME, prop_value, NULL) &&
strcmp(prop_value, "1") == 0) {
return 1;
}
return 0;
}
int is_fst_driver_loaded()
{
char driver_status[PROPERTY_VALUE_MAX];
FILE *proc;
char line[sizeof(WIFI_FST_DRIVER_MODULE_TAG)+10];
if (!is_fst_enabled())
return 1;
if (!property_get(FST_DRIVER_PROP_NAME, driver_status, NULL) ||
strcmp(driver_status, "ok") != 0)
return 0; /* driver not loaded */
/*
* If the property says the driver is loaded, check to
* make sure that the property setting isn't just left
* over from a previous manual shutdown or a runtime
* crash.
*/
if ((proc = fopen(MODULE_FILE, "r")) == NULL) {
ALOGW("Could not open %s: %s", MODULE_FILE, strerror(errno));
property_set(FST_DRIVER_PROP_NAME, "unloaded");
return 0;
}
while ((fgets(line, sizeof(line), proc)) != NULL)
if (strncmp(line, WIFI_FST_DRIVER_MODULE_TAG,
strlen(WIFI_FST_DRIVER_MODULE_TAG)) == 0) {
fclose(proc);
return 1;
}
fclose(proc);
property_set(FST_DRIVER_PROP_NAME, "unloaded");
return 0;
}
int wifi_fst_load_driver()
{
if (!is_fst_enabled())
return 0;
if (is_fst_driver_loaded())
return 0;
if (insmod(WIFI_FST_DRIVER_MODULE_PATH, WIFI_FST_DRIVER_MODULE_ARG) < 0)
return -1;
property_set(FST_DRIVER_PROP_NAME, "ok");
return 0;
}
int wifi_fst_unload_driver()
{
int count = 20; /* wait at most 10 seconds for completion */
if (!is_fst_enabled())
return 0;
if (rmmod(WIFI_FST_DRIVER_MODULE_NAME) != 0)
return -1;
while (count-- > 0) {
if (!is_fst_driver_loaded())
break;
usleep(500000);
}
usleep(500000); /* allow card removal */
if (count)
return 0;
return -1;
}
int wifi_start_fstman(int softap_mode)
{
char fstman_status[PROPERTY_VALUE_MAX] = { '\0' };
char fstman_start_cmd[PROPERTY_VALUE_MAX] = { '\0' };
int count = 50; /* wait at most 5 seconds for completion */
if (!is_fst_enabled())
return 0;
if (ensure_config_file_exists(FSTMAN_CONFIG_FILE, FSTMAN_CONFIG_TEMPLATE) < 0) {
ALOGE("Failed to create fstman config file");
return -1;
}
/* Check whether already running */
if (property_get(FSTMAN_PROP_NAME, fstman_status, NULL) &&
strcmp(fstman_status, "running") == 0)
return 0;
ALOGD("Starting FST Manager");
/* when invoked from netd, use different property because of different
selinux permissions */
if (softap_mode) {
property_set(FSTMAN_START_PROP_NAME, "true");
} else {
snprintf(fstman_start_cmd, sizeof(fstman_start_cmd), "%s:%s",
FSTMAN_NAME, SUPPLICANT_GLOBAL_CTRL_IFACE);
property_set("ctl.start", fstman_start_cmd);
}
sched_yield();
while (count-- > 0) {
if (property_get(FSTMAN_PROP_NAME, fstman_status, NULL) &&
strcmp(fstman_status, "running") == 0)
return 0;
usleep(100000);
}
ALOGE("Failed to start FST Manager");
return -1;
}
int wifi_stop_fstman(int softap_mode)
{
char fstman_status[PROPERTY_VALUE_MAX] = { '\0' };
int count = 50; /* wait at most 5 seconds for completion */
if (!is_fst_enabled())
return 0;
/* Check whether already stopped */
if (property_get(FSTMAN_PROP_NAME, fstman_status, NULL) &&
strcmp(fstman_status, "stopped") == 0)
return 0;
ALOGD("Stopping FST Manager");
/* when invoked from netd, use different property because of different
selinux permissions */
if (softap_mode)
property_set(FSTMAN_START_PROP_NAME, "false");
else
property_set("ctl.stop", FSTMAN_NAME);
sched_yield();
while (count-- > 0) {
if (property_get(FSTMAN_PROP_NAME, fstman_status, NULL) &&
strcmp(fstman_status, "stopped") == 0)
return 0;
usleep(100000);
}
ALOGE("Failed to stop fstman");
return -1;
}
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