/*
* 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 <fcntl.h>
#include <errno.h>
#include <string.h>
#include <dirent.h>
#include <sys/socket.h>
#include <poll.h>
#include "hardware_legacy/wifi.h"
#include "libwpa_client/wpa_ctrl.h"
#define LOG_TAG "WifiHW"
#include "cutils/log.h"
#include "cutils/memory.h"
#include "cutils/misc.h"
#include "cutils/properties.h"
#include "private/android_filesystem_config.h"
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
#include <sys/_system_properties.h>
#endif
static struct wpa_ctrl *ctrl_conn;
static struct wpa_ctrl *monitor_conn;
/* socket pair used to exit from a blocking read */
static int exit_sockets[2] = { -1, -1 };
extern int do_dhcp();
extern int ifc_init();
extern void ifc_close();
extern char *dhcp_lasterror();
extern void get_dhcp_info();
extern int init_module(void *, unsigned long, const char *);
extern int delete_module(const char *, unsigned int);
static char iface[PROPERTY_VALUE_MAX];
// TODO: use new ANDROID_SOCKET mechanism, once support for multiple
// sockets is in
#ifndef WIFI_DRIVER_MODULE_ARG
#define WIFI_DRIVER_MODULE_ARG ""
#endif
#ifndef WIFI_FIRMWARE_LOADER
#define WIFI_FIRMWARE_LOADER ""
#endif
#define WIFI_TEST_INTERFACE "sta"
#ifndef WIFI_DRIVER_FW_PATH_STA
#define WIFI_DRIVER_FW_PATH_STA NULL
#endif
#ifndef WIFI_DRIVER_FW_PATH_AP
#define WIFI_DRIVER_FW_PATH_AP NULL
#endif
#ifndef WIFI_DRIVER_FW_PATH_P2P
#define WIFI_DRIVER_FW_PATH_P2P NULL
#endif
#ifndef WIFI_DRIVER_FW_PATH_PARAM
#define WIFI_DRIVER_FW_PATH_PARAM "/sys/module/wlan/parameters/fwpath"
#endif
#define WIFI_DRIVER_LOADER_DELAY 1000000
static const char IFACE_DIR[] = "/data/system/wpa_supplicant";
#ifdef WIFI_DRIVER_MODULE_PATH
static const char DRIVER_MODULE_NAME[] = WIFI_DRIVER_MODULE_NAME;
static const char DRIVER_MODULE_TAG[] = WIFI_DRIVER_MODULE_NAME " ";
static const char DRIVER_MODULE_PATH[] = WIFI_DRIVER_MODULE_PATH;
static const char DRIVER_MODULE_ARG[] = WIFI_DRIVER_MODULE_ARG;
#endif
static const char FIRMWARE_LOADER[] = WIFI_FIRMWARE_LOADER;
static const char DRIVER_PROP_NAME[] = "wlan.driver.status";
static const char SUPPLICANT_NAME[] = "wpa_supplicant";
static const char SUPP_PROP_NAME[] = "init.svc.wpa_supplicant";
static const char SUPP_CONFIG_TEMPLATE[]= "/system/etc/wifi/wpa_supplicant.conf";
static const char SUPP_CONFIG_FILE[] = "/data/misc/wifi/wpa_supplicant.conf";
static const char P2P_CONFIG_FILE[] = "/data/misc/wifi/p2p_supplicant.conf";
static const char CONTROL_IFACE_PATH[] = "/data/misc/wifi";
static const char MODULE_FILE[] = "/proc/modules";
static const char SUPP_ENTROPY_FILE[] = WIFI_ENTROPY_FILE;
static unsigned char dummy_key[21] = { 0x02, 0x11, 0xbe, 0x33, 0x43, 0x35,
0x68, 0x47, 0x84, 0x99, 0xa9, 0x2b,
0x1c, 0xd3, 0xee, 0xff, 0xf1, 0xe2,
0xf3, 0xf4, 0xf5 };
static int insmod(const char *filename, const char *args)
{
void *module;
unsigned int size;
int ret;
module = load_file(filename, &size);
if (!module)
return -1;
ret = init_module(module, size, args);
free(module);
return ret;
}
static int rmmod(const char *modname)
{
int ret = -1;
int maxtry = 10;
while (maxtry-- > 0) {
ret = delete_module(modname, O_NONBLOCK | O_EXCL);
if (ret < 0 && errno == EAGAIN)
usleep(500000);
else
break;
}
if (ret != 0)
LOGD("Unable to unload driver module \"%s\": %s\n",
modname, strerror(errno));
return ret;
}
int do_dhcp_request(int *ipaddr, int *gateway, int *mask,
int *dns1, int *dns2, int *server, int *lease) {
/* For test driver, always report success */
if (strcmp(iface, WIFI_TEST_INTERFACE) == 0)
return 0;
if (ifc_init() < 0)
return -1;
if (do_dhcp(iface) < 0) {
ifc_close();
return -1;
}
ifc_close();
get_dhcp_info(ipaddr, gateway, mask, dns1, dns2, server, lease);
return 0;
}
const char *get_dhcp_error_string() {
return dhcp_lasterror();
}
int is_wifi_driver_loaded() {
char driver_status[PROPERTY_VALUE_MAX];
#ifdef WIFI_DRIVER_MODULE_PATH
FILE *proc;
char line[sizeof(DRIVER_MODULE_TAG)+10];
#endif
if (!property_get(DRIVER_PROP_NAME, driver_status, NULL)
|| strcmp(driver_status, "ok") != 0) {
return 0; /* driver not loaded */
}
#ifdef WIFI_DRIVER_MODULE_PATH
/*
* 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) {
LOGW("Could not open %s: %s", MODULE_FILE, strerror(errno));
property_set(DRIVER_PROP_NAME, "unloaded");
return 0;
}
while ((fgets(line, sizeof(line), proc)) != NULL) {
if (strncmp(line, DRIVER_MODULE_TAG, strlen(DRIVER_MODULE_TAG)) == 0) {
fclose(proc);
return 1;
}
}
fclose(proc);
property_set(DRIVER_PROP_NAME, "unloaded");
return 0;
#else
return 1;
#endif
}
int wifi_load_driver()
{
#ifdef WIFI_DRIVER_MODULE_PATH
char driver_status[PROPERTY_VALUE_MAX];
int count = 100; /* wait at most 20 seconds for completion */
if (is_wifi_driver_loaded()) {
return 0;
}
if (insmod(DRIVER_MODULE_PATH, DRIVER_MODULE_ARG) < 0)
return -1;
if (strcmp(FIRMWARE_LOADER,"") == 0) {
/* usleep(WIFI_DRIVER_LOADER_DELAY); */
property_set(DRIVER_PROP_NAME, "ok");
}
else {
property_set("ctl.start", FIRMWARE_LOADER);
}
sched_yield();
while (count-- > 0) {
if (property_get(DRIVER_PROP_NAME, driver_status, NULL)) {
if (strcmp(driver_status, "ok") == 0)
return 0;
else if (strcmp(DRIVER_PROP_NAME, "failed") == 0) {
wifi_unload_driver();
return -1;
}
}
usleep(200000);
}
property_set(DRIVER_PROP_NAME, "timeout");
wifi_unload_driver();
return -1;
#else
property_set(DRIVER_PROP_NAME, "ok");
return 0;
#endif
}
int wifi_unload_driver()
{
usleep(200000); /* allow to finish interface down */
#ifdef WIFI_DRIVER_MODULE_PATH
if (rmmod(DRIVER_MODULE_NAME) == 0) {
int count = 20; /* wait at most 10 seconds for completion */
while (count-- > 0) {
if (!is_wifi_driver_loaded())
break;
usleep(500000);
}
usleep(500000); /* allow card removal */
if (count) {
return 0;
}
return -1;
} else
return -1;
#else
property_set(DRIVER_PROP_NAME, "unloaded");
return 0;
#endif
}
int ensure_entropy_file_exists()
{
int ret;
int destfd;
ret = access(SUPP_ENTROPY_FILE, R_OK|W_OK);
if ((ret == 0) || (errno == EACCES)) {
if ((ret != 0) &&
(chmod(SUPP_ENTROPY_FILE, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP) != 0)) {
LOGE("Cannot set RW to \"%s\": %s", SUPP_ENTROPY_FILE, strerror(errno));
return -1;
}
return 0;
}
destfd = open(SUPP_ENTROPY_FILE, O_CREAT|O_RDWR, 0660);
if (destfd < 0) {
LOGE("Cannot create \"%s\": %s", SUPP_ENTROPY_FILE, strerror(errno));
return -1;
}
if (write(destfd, dummy_key, sizeof(dummy_key)) != sizeof(dummy_key)) {
LOGE("Error writing \"%s\": %s", SUPP_ENTROPY_FILE, strerror(errno));
close(destfd);
return -1;
}
close(destfd);
/* chmod is needed because open() didn't set permisions properly */
if (chmod(SUPP_ENTROPY_FILE, 0660) < 0) {
LOGE("Error changing permissions of %s to 0660: %s",
SUPP_ENTROPY_FILE, strerror(errno));
unlink(SUPP_ENTROPY_FILE);
return -1;
}
if (chown(SUPP_ENTROPY_FILE, AID_SYSTEM, AID_WIFI) < 0) {
LOGE("Error changing group ownership of %s to %d: %s",
SUPP_ENTROPY_FILE, AID_WIFI, strerror(errno));
unlink(SUPP_ENTROPY_FILE);
return -1;
}
return 0;
}
int update_ctrl_interface(const char *config_file) {
int srcfd, destfd;
int nread;
char ifc[PROPERTY_VALUE_MAX];
char *pbuf;
char *sptr;
struct stat sb;
if (stat(config_file, &sb) != 0)
return -1;
pbuf = malloc(sb.st_size + PROPERTY_VALUE_MAX);
if (!pbuf)
return 0;
srcfd = open(config_file, O_RDONLY);
if (srcfd < 0) {
LOGE("Cannot open \"%s\": %s", config_file, strerror(errno));
free(pbuf);
return 0;
}
nread = read(srcfd, pbuf, sb.st_size);
close(srcfd);
if (nread < 0) {
LOGE("Cannot read \"%s\": %s", config_file, strerror(errno));
free(pbuf);
return 0;
}
if (!strcmp(config_file, SUPP_CONFIG_FILE)) {
property_get("wifi.interface", ifc, WIFI_TEST_INTERFACE);
} else {
strcpy(ifc, CONTROL_IFACE_PATH);
}
if ((sptr = strstr(pbuf, "ctrl_interface="))) {
char *iptr = sptr + strlen("ctrl_interface=");
int ilen = 0;
int mlen = strlen(ifc);
int nwrite;
if (strncmp(ifc, iptr, mlen) != 0) {
LOGE("ctrl_interface != %s", ifc);
while (((ilen + (iptr - pbuf)) < nread) && (iptr[ilen] != '\n'))
ilen++;
mlen = ((ilen >= mlen) ? ilen : mlen) + 1;
memmove(iptr + mlen, iptr + ilen + 1, nread - (iptr + ilen + 1 - pbuf));
memset(iptr, '\n', mlen);
memcpy(iptr, ifc, strlen(ifc));
destfd = open(config_file, O_RDWR, 0660);
if (destfd < 0) {
LOGE("Cannot update \"%s\": %s", config_file, strerror(errno));
free(pbuf);
return -1;
}
write(destfd, pbuf, nread + mlen - ilen -1);
close(destfd);
}
}
free(pbuf);
return 0;
}
int ensure_config_file_exists(const char *config_file)
{
char buf[2048];
int srcfd, destfd;
struct stat sb;
int nread;
int ret;
ret = access(config_file, R_OK|W_OK);
if ((ret == 0) || (errno == EACCES)) {
if ((ret != 0) &&
(chmod(config_file, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP) != 0)) {
LOGE("Cannot set RW to \"%s\": %s", config_file, strerror(errno));
return -1;
}
/* return if filesize is at least 10 bytes */
if (stat(config_file, &sb) == 0 && sb.st_size > 10) {
return update_ctrl_interface(config_file);
}
} else if (errno != ENOENT) {
LOGE("Cannot access \"%s\": %s", config_file, strerror(errno));
return -1;
}
srcfd = open(SUPP_CONFIG_TEMPLATE, O_RDONLY);
if (srcfd < 0) {
LOGE("Cannot open \"%s\": %s", SUPP_CONFIG_TEMPLATE, strerror(errno));
return -1;
}
destfd = open(config_file, O_CREAT|O_RDWR, 0660);
if (destfd < 0) {
close(srcfd);
LOGE("Cannot create \"%s\": %s", config_file, strerror(errno));
return -1;
}
while ((nread = read(srcfd, buf, sizeof(buf))) != 0) {
if (nread < 0) {
LOGE("Error reading \"%s\": %s", SUPP_CONFIG_TEMPLATE, strerror(errno));
close(srcfd);
close(destfd);
unlink(config_file);
return -1;
}
write(destfd, buf, nread);
}
close(destfd);
close(srcfd);
/* chmod is needed because open() didn't set permisions properly */
if (chmod(config_file, 0660) < 0) {
LOGE("Error changing permissions of %s to 0660: %s",
config_file, strerror(errno));
unlink(config_file);
return -1;
}
if (chown(config_file, AID_SYSTEM, AID_WIFI) < 0) {
LOGE("Error changing group ownership of %s to %d: %s",
config_file, AID_WIFI, strerror(errno));
unlink(config_file);
return -1;
}
return update_ctrl_interface(config_file);
}
/**
* wifi_wpa_ctrl_cleanup() - Delete any local UNIX domain socket files that
* may be left over from clients that were previously connected to
* wpa_supplicant. This keeps these files from being orphaned in the
* event of crashes that prevented them from being removed as part
* of the normal orderly shutdown.
*/
void wifi_wpa_ctrl_cleanup(void)
{
DIR *dir;
struct dirent entry;
struct dirent *result;
size_t dirnamelen;
size_t maxcopy;
char pathname[PATH_MAX];
char *namep;
char *local_socket_dir = CONFIG_CTRL_IFACE_CLIENT_DIR;
char *local_socket_prefix = CONFIG_CTRL_IFACE_CLIENT_PREFIX;
if ((dir = opendir(local_socket_dir)) == NULL)
return;
dirnamelen = (size_t)snprintf(pathname, sizeof(pathname), "%s/", local_socket_dir);
if (dirnamelen >= sizeof(pathname)) {
closedir(dir);
return;
}
namep = pathname + dirnamelen;
maxcopy = PATH_MAX - dirnamelen;
while (readdir_r(dir, &entry, &result) == 0 && result != NULL) {
if (strncmp(entry.d_name, local_socket_prefix, strlen(local_socket_prefix)) == 0) {
if (strlcpy(namep, entry.d_name, maxcopy) < maxcopy) {
unlink(pathname);
}
}
}
closedir(dir);
}
int wifi_start_supplicant_common(const char *config_file)
{
char daemon_cmd[PROPERTY_VALUE_MAX];
char supp_status[PROPERTY_VALUE_MAX] = {'\0'};
int count = 200; /* wait at most 20 seconds for completion */
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
const prop_info *pi;
unsigned serial = 0;
#endif
/* Check whether already running */
if (property_get(SUPP_PROP_NAME, supp_status, NULL)
&& strcmp(supp_status, "running") == 0) {
return 0;
}
/* Before starting the daemon, make sure its config file exists */
if (ensure_config_file_exists(config_file) < 0) {
LOGE("Wi-Fi will not be enabled");
return -1;
}
if (ensure_entropy_file_exists() < 0) {
LOGE("Wi-Fi entropy file was not created");
}
/* Clear out any stale socket files that might be left over. */
wifi_wpa_ctrl_cleanup();
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
/*
* Get a reference to the status property, so we can distinguish
* the case where it goes stopped => running => stopped (i.e.,
* it start up, but fails right away) from the case in which
* it starts in the stopped state and never manages to start
* running at all.
*/
pi = __system_property_find(SUPP_PROP_NAME);
if (pi != NULL) {
serial = pi->serial;
}
#endif
property_get("wifi.interface", iface, WIFI_TEST_INTERFACE);
snprintf(daemon_cmd, PROPERTY_VALUE_MAX, "%s:-i%s -c%s", SUPPLICANT_NAME, iface, config_file);
property_set("ctl.start", daemon_cmd);
sched_yield();
while (count-- > 0) {
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
if (pi == NULL) {
pi = __system_property_find(SUPP_PROP_NAME);
}
if (pi != NULL) {
__system_property_read(pi, NULL, supp_status);
if (strcmp(supp_status, "running") == 0) {
return 0;
} else if (pi->serial != serial &&
strcmp(supp_status, "stopped") == 0) {
return -1;
}
}
#else
if (property_get(SUPP_PROP_NAME, supp_status, NULL)) {
if (strcmp(supp_status, "running") == 0)
return 0;
}
#endif
usleep(100000);
}
return -1;
}
int wifi_start_supplicant()
{
return wifi_start_supplicant_common(SUPP_CONFIG_FILE);
}
int wifi_start_p2p_supplicant()
{
return wifi_start_supplicant_common(P2P_CONFIG_FILE);
}
int wifi_stop_supplicant()
{
char supp_status[PROPERTY_VALUE_MAX] = {'\0'};
int count = 50; /* wait at most 5 seconds for completion */
/* Check whether supplicant already stopped */
if (property_get(SUPP_PROP_NAME, supp_status, NULL)
&& strcmp(supp_status, "stopped") == 0) {
return 0;
}
property_set("ctl.stop", SUPPLICANT_NAME);
sched_yield();
while (count-- > 0) {
if (property_get(SUPP_PROP_NAME, supp_status, NULL)) {
if (strcmp(supp_status, "stopped") == 0)
return 0;
}
usleep(100000);
}
return -1;
}
int wifi_connect_to_supplicant()
{
char ifname[256];
char supp_status[PROPERTY_VALUE_MAX] = {'\0'};
/* Make sure supplicant is running */
if (!property_get(SUPP_PROP_NAME, supp_status, NULL)
|| strcmp(supp_status, "running") != 0) {
LOGE("Supplicant not running, cannot connect");
return -1;
}
if (access(IFACE_DIR, F_OK) == 0) {
snprintf(ifname, sizeof(ifname), "%s/%s", IFACE_DIR, iface);
} else {
strlcpy(ifname, iface, sizeof(ifname));
}
ctrl_conn = wpa_ctrl_open(ifname);
if (ctrl_conn == NULL) {
LOGE("Unable to open connection to supplicant on \"%s\": %s",
ifname, strerror(errno));
return -1;
}
monitor_conn = wpa_ctrl_open(ifname);
if (monitor_conn == NULL) {
wpa_ctrl_close(ctrl_conn);
ctrl_conn = NULL;
return -1;
}
if (wpa_ctrl_attach(monitor_conn) != 0) {
wpa_ctrl_close(monitor_conn);
wpa_ctrl_close(ctrl_conn);
ctrl_conn = monitor_conn = NULL;
return -1;
}
if (socketpair(AF_UNIX, SOCK_STREAM, 0, exit_sockets) == -1) {
wpa_ctrl_close(monitor_conn);
wpa_ctrl_close(ctrl_conn);
ctrl_conn = monitor_conn = NULL;
return -1;
}
return 0;
}
int wifi_send_command(struct wpa_ctrl *ctrl, const char *cmd, char *reply, size_t *reply_len)
{
int ret;
if (ctrl_conn == NULL) {
LOGV("Not connected to wpa_supplicant - \"%s\" command dropped.\n", cmd);
return -1;
}
ret = wpa_ctrl_request(ctrl, cmd, strlen(cmd), reply, reply_len, NULL);
if (ret == -2) {
LOGD("'%s' command timed out.\n", cmd);
/* unblocks the monitor receive socket for termination */
write(exit_sockets[0], "T", 1);
return -2;
} else if (ret < 0 || strncmp(reply, "FAIL", 4) == 0) {
return -1;
}
if (strncmp(cmd, "PING", 4) == 0) {
reply[*reply_len] = '\0';
}
return 0;
}
int wifi_ctrl_recv(struct wpa_ctrl *ctrl, char *reply, size_t *reply_len)
{
int res;
int ctrlfd = wpa_ctrl_get_fd(ctrl);
struct pollfd rfds[2];
memset(rfds, 0, 2 * sizeof(struct pollfd));
rfds[0].fd = ctrlfd;
rfds[0].events |= POLLIN;
rfds[1].fd = exit_sockets[1];
rfds[1].events |= POLLIN;
res = poll(rfds, 2, -1);
if (res < 0) {
LOGE("Error poll = %d", res);
return res;
}
if (rfds[0].revents & POLLIN) {
return wpa_ctrl_recv(ctrl, reply, reply_len);
} else {
LOGD("Received on exit socket, terminate");
return -1;
}
return 0;
}
int wifi_wait_for_event(char *buf, size_t buflen)
{
size_t nread = buflen - 1;
int fd;
fd_set rfds;
int result;
struct timeval tval;
struct timeval *tptr;
if (monitor_conn == NULL) {
LOGD("Connection closed\n");
strncpy(buf, WPA_EVENT_TERMINATING " - connection closed", buflen-1);
buf[buflen-1] = '\0';
return strlen(buf);
}
result = wifi_ctrl_recv(monitor_conn, buf, &nread);
if (result < 0) {
LOGD("wifi_ctrl_recv failed: %s\n", strerror(errno));
strncpy(buf, WPA_EVENT_TERMINATING " - recv error", buflen-1);
buf[buflen-1] = '\0';
return strlen(buf);
}
buf[nread] = '\0';
/* LOGD("wait_for_event: result=%d nread=%d string=\"%s\"\n", result, nread, buf); */
/* Check for EOF on the socket */
if (result == 0 && nread == 0) {
/* Fabricate an event to pass up */
LOGD("Received EOF on supplicant socket\n");
strncpy(buf, WPA_EVENT_TERMINATING " - signal 0 received", buflen-1);
buf[buflen-1] = '\0';
return strlen(buf);
}
/*
* Events strings are in the format
*
* <N>CTRL-EVENT-XXX
*
* where N is the message level in numerical form (0=VERBOSE, 1=DEBUG,
* etc.) and XXX is the event name. The level information is not useful
* to us, so strip it off.
*/
if (buf[0] == '<') {
char *match = strchr(buf, '>');
if (match != NULL) {
nread -= (match+1-buf);
memmove(buf, match+1, nread+1);
}
}
return nread;
}
void wifi_close_supplicant_connection()
{
char supp_status[PROPERTY_VALUE_MAX] = {'\0'};
int count = 50; /* wait at most 5 seconds to ensure init has stopped stupplicant */
if (ctrl_conn != NULL) {
wpa_ctrl_close(ctrl_conn);
ctrl_conn = NULL;
}
if (monitor_conn != NULL) {
wpa_ctrl_close(monitor_conn);
monitor_conn = NULL;
}
if (exit_sockets[0] >= 0) {
close(exit_sockets[0]);
exit_sockets[0] = -1;
}
if (exit_sockets[1] >= 0) {
close(exit_sockets[1]);
exit_sockets[1] = -1;
}
while (count-- > 0) {
if (property_get(SUPP_PROP_NAME, supp_status, NULL)) {
if (strcmp(supp_status, "stopped") == 0)
return;
}
usleep(100000);
}
}
int wifi_command(const char *command, char *reply, size_t *reply_len)
{
return wifi_send_command(ctrl_conn, command, reply, reply_len);
}
const char *wifi_get_fw_path(int fw_type)
{
switch (fw_type) {
case WIFI_GET_FW_PATH_STA:
return WIFI_DRIVER_FW_PATH_STA;
case WIFI_GET_FW_PATH_AP:
return WIFI_DRIVER_FW_PATH_AP;
case WIFI_GET_FW_PATH_P2P:
return WIFI_DRIVER_FW_PATH_P2P;
}
return NULL;
}
int wifi_change_fw_path(const char *fwpath)
{
int len;
int fd;
int ret = 0;
if (!fwpath)
return ret;
fd = open(WIFI_DRIVER_FW_PATH_PARAM, O_WRONLY);
if (fd < 0) {
LOGE("Failed to open wlan fw path param (%s)", strerror(errno));
return -1;
}
len = strlen(fwpath) + 1;
if (write(fd, fwpath, len) != len) {
LOGE("Failed to write wlan fw path param (%s)", strerror(errno));
ret = -1;
}
close(fd);
return ret;
}