262 lines
7.7 KiB
C++
Executable File
262 lines
7.7 KiB
C++
Executable File
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdlib.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <linux/wireless.h>
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#include <openssl/evp.h>
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#include <openssl/sha.h>
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#define LOG_TAG "SoftapController"
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#include <cutils/log.h>
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#include <cutils/properties.h>
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#include <netutils/ifc.h>
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#include <private/android_filesystem_config.h>
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#include "wifi.h"
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#include "ResponseCode.h"
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#include "SoftapController.h"
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static const char HOSTAPD_CONF_FILE[] = "/data/misc/wifi/hostapd.conf";
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static const char HOSTAPD_BIN_FILE[] = "/system/bin/hostapd";
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static const char HOSTAPD_RTL_BIN_FILE[] = "/system/bin/hostapd_rtl";
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static const char HOSTAPD_ESP_BIN_FILE[] = "/system/bin/hostapd_esp";
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extern int check_wifi_chip_type_string(char *type);
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SoftapController::SoftapController()
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: mPid(0) {}
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SoftapController::~SoftapController() {
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}
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int SoftapController::startSoftap() {
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pid_t pid = 1;
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char type[64], hostapd_name[64];
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check_wifi_chip_type_string(type);
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if (!strncmp(type, "AP", 2)) {
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strcpy(hostapd_name, HOSTAPD_BIN_FILE);
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} else if (!strncmp(type, "RK", 2)) {
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strcpy(hostapd_name, HOSTAPD_BIN_FILE);
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} else if (!strncmp(type, "RTL", 3)) {
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strcpy(hostapd_name, HOSTAPD_RTL_BIN_FILE);
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} else {
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strcpy(hostapd_name, HOSTAPD_ESP_BIN_FILE);
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}
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ALOGD("%s: %s", __func__, hostapd_name);
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if (mPid) {
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ALOGE("SoftAP is already running");
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return ResponseCode::SoftapStatusResult;
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}
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if (ensure_entropy_file_exists() < 0) {
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ALOGE("Wi-Fi entropy file was not created");
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}
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if ((pid = fork()) < 0) {
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ALOGE("fork failed (%s)", strerror(errno));
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return ResponseCode::ServiceStartFailed;
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}
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if (!pid) {
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ensure_entropy_file_exists();
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if (execl(hostapd_name, hostapd_name,
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"-e", WIFI_ENTROPY_FILE,
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HOSTAPD_CONF_FILE, (char *) NULL)) {
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ALOGE("execl failed (%s)", strerror(errno));
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}
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ALOGE("SoftAP failed to start");
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return ResponseCode::ServiceStartFailed;
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} else {
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mPid = pid;
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ALOGD("SoftAP started successfully");
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usleep(AP_BSS_START_DELAY);
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}
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return ResponseCode::SoftapStatusResult;
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}
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int SoftapController::stopSoftap() {
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if (mPid == 0) {
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ALOGE("SoftAP is not running");
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return ResponseCode::SoftapStatusResult;
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}
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ALOGD("Stopping the SoftAP service...");
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kill(mPid, SIGTERM);
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waitpid(mPid, NULL, 0);
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mPid = 0;
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ALOGD("SoftAP stopped successfully");
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usleep(AP_BSS_STOP_DELAY);
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return ResponseCode::SoftapStatusResult;
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}
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bool SoftapController::isSoftapStarted() {
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return (mPid != 0);
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}
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/*
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* Arguments:
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* argv[2] - wlan interface
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* argv[3] - SSID
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* argv[4] - Broadcast/Hidden
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* argv[5] - Channel
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* argv[6] - Security
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* argv[7] - Key
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*/
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int SoftapController::setSoftap(int argc, char *argv[]) {
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char psk_str[2*SHA256_DIGEST_LENGTH+1];
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int ret = ResponseCode::SoftapStatusResult;
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int fd;
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int hidden = 0;
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int channel = AP_CHANNEL_DEFAULT;
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char *wbuf = NULL;
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char *fbuf = NULL;
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if (argc < 5) {
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ALOGE("Softap set is missing arguments. Please use:");
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ALOGE("softap <wlan iface> <SSID> <hidden/broadcast> <channel> <wpa2?-psk|open> <passphrase>");
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return ResponseCode::CommandSyntaxError;
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}
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if (!strcasecmp(argv[4], "hidden"))
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hidden = 1;
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if (argc >= 5) {
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channel = atoi(argv[5]);
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if (channel <= 0)
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channel = AP_CHANNEL_DEFAULT;
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}
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asprintf(&wbuf, "interface=%s\ndriver=nl80211\nctrl_interface="
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"/data/misc/wifi/hostapd\nssid=%s\nchannel=%d\nieee80211n=1\n"
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"hw_mode=g\nignore_broadcast_ssid=%d\nwowlan_triggers=any\n",
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argv[2], argv[3], channel, hidden);
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if (argc > 7) {
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if (!strcmp(argv[6], "wpa-psk")) {
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generatePsk(argv[3], argv[7], psk_str);
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asprintf(&fbuf, "%swpa=3\nwpa_pairwise=TKIP CCMP\nwpa_psk=%s\n", wbuf, psk_str);
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} else if (!strcmp(argv[6], "wpa2-psk")) {
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generatePsk(argv[3], argv[7], psk_str);
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asprintf(&fbuf, "%swpa=2\nrsn_pairwise=CCMP\nwpa_psk=%s\n", wbuf, psk_str);
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} else if (!strcmp(argv[6], "open")) {
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asprintf(&fbuf, "%s", wbuf);
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}
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} else if (argc > 6) {
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if (!strcmp(argv[6], "open")) {
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asprintf(&fbuf, "%s", wbuf);
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}
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} else {
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asprintf(&fbuf, "%s", wbuf);
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}
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fd = open(HOSTAPD_CONF_FILE, O_CREAT | O_TRUNC | O_WRONLY | O_NOFOLLOW, 0660);
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if (fd < 0) {
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ALOGE("Cannot update \"%s\": %s", HOSTAPD_CONF_FILE, strerror(errno));
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free(wbuf);
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free(fbuf);
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return ResponseCode::OperationFailed;
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}
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if (write(fd, fbuf, strlen(fbuf)) < 0) {
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ALOGE("Cannot write to \"%s\": %s", HOSTAPD_CONF_FILE, strerror(errno));
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ret = ResponseCode::OperationFailed;
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}
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free(wbuf);
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free(fbuf);
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/* Note: apparently open can fail to set permissions correctly at times */
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if (fchmod(fd, 0660) < 0) {
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ALOGE("Error changing permissions of %s to 0660: %s",
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HOSTAPD_CONF_FILE, strerror(errno));
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close(fd);
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unlink(HOSTAPD_CONF_FILE);
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return ResponseCode::OperationFailed;
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}
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if (fchown(fd, AID_SYSTEM, AID_WIFI) < 0) {
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ALOGE("Error changing group ownership of %s to %d: %s",
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HOSTAPD_CONF_FILE, AID_WIFI, strerror(errno));
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close(fd);
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unlink(HOSTAPD_CONF_FILE);
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return ResponseCode::OperationFailed;
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}
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close(fd);
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return ret;
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}
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/*
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* Arguments:
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* argv[2] - interface name
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* argv[3] - AP or P2P or STA
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*/
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int SoftapController::fwReloadSoftap(int argc, char *argv[])
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{
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char *fwpath = NULL;
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if (argc < 4) {
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ALOGE("SoftAP fwreload is missing arguments. Please use: softap <wlan iface> <AP|P2P|STA>");
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return ResponseCode::CommandSyntaxError;
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}
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if (strcmp(argv[3], "AP") == 0) {
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fwpath = (char *)wifi_get_fw_path(WIFI_GET_FW_PATH_AP);
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} else if (strcmp(argv[3], "P2P") == 0) {
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fwpath = (char *)wifi_get_fw_path(WIFI_GET_FW_PATH_P2P);
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} else if (strcmp(argv[3], "STA") == 0) {
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fwpath = (char *)wifi_get_fw_path(WIFI_GET_FW_PATH_STA);
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}
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if (!fwpath)
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return ResponseCode::CommandParameterError;
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if (wifi_change_fw_path((const char *)fwpath)) {
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ALOGE("Softap fwReload failed");
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return ResponseCode::OperationFailed;
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}
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else {
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ALOGD("Softap fwReload - Ok");
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}
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return ResponseCode::SoftapStatusResult;
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}
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void SoftapController::generatePsk(char *ssid, char *passphrase, char *psk_str) {
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unsigned char psk[SHA256_DIGEST_LENGTH];
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int j;
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// Use the PKCS#5 PBKDF2 with 4096 iterations
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PKCS5_PBKDF2_HMAC_SHA1(passphrase, strlen(passphrase),
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reinterpret_cast<const unsigned char *>(ssid), strlen(ssid),
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4096, SHA256_DIGEST_LENGTH, psk);
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for (j=0; j < SHA256_DIGEST_LENGTH; j++) {
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sprintf(&psk_str[j*2], "%02x", psk[j]);
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}
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}
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