android_net_wifi_Wifi.cpp revision 44b330dfb0aeecb4e2ac97ff72a5abfb341c74fb
1/* 2 * Copyright 2008, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define LOG_TAG "wifi" 18 19#include "jni.h" 20#include <ScopedUtfChars.h> 21#include <utils/misc.h> 22#include <android_runtime/AndroidRuntime.h> 23#include <utils/Log.h> 24#include <utils/String16.h> 25 26#include "wifi.h" 27 28#define WIFI_PKG_NAME "android/net/wifi/WifiNative" 29#define BUF_SIZE 256 30 31namespace android { 32 33static jint DBG = false; 34 35static int doCommand(const char *ifname, const char *cmd, char *replybuf, int replybuflen) 36{ 37 size_t reply_len = replybuflen - 1; 38 39 if (::wifi_command(ifname, cmd, replybuf, &reply_len) != 0) 40 return -1; 41 else { 42 // Strip off trailing newline 43 if (reply_len > 0 && replybuf[reply_len-1] == '\n') 44 replybuf[reply_len-1] = '\0'; 45 else 46 replybuf[reply_len] = '\0'; 47 return 0; 48 } 49} 50 51static jint doIntCommand(const char *ifname, const char* fmt, ...) 52{ 53 char buf[BUF_SIZE]; 54 va_list args; 55 va_start(args, fmt); 56 int byteCount = vsnprintf(buf, sizeof(buf), fmt, args); 57 va_end(args); 58 if (byteCount < 0 || byteCount >= BUF_SIZE) { 59 return -1; 60 } 61 char reply[BUF_SIZE]; 62 if (doCommand(ifname, buf, reply, sizeof(reply)) != 0) { 63 return -1; 64 } 65 return static_cast<jint>(atoi(reply)); 66} 67 68static jboolean doBooleanCommand(const char *ifname, const char* expect, const char* fmt, ...) 69{ 70 char buf[BUF_SIZE]; 71 va_list args; 72 va_start(args, fmt); 73 int byteCount = vsnprintf(buf, sizeof(buf), fmt, args); 74 va_end(args); 75 if (byteCount < 0 || byteCount >= BUF_SIZE) { 76 return JNI_FALSE; 77 } 78 char reply[BUF_SIZE]; 79 if (doCommand(ifname, buf, reply, sizeof(reply)) != 0) { 80 return JNI_FALSE; 81 } 82 return (strcmp(reply, expect) == 0); 83} 84 85// Send a command to the supplicant, and return the reply as a String 86static jstring doStringCommand(JNIEnv* env, const char *ifname, const char* fmt, ...) { 87 char buf[BUF_SIZE]; 88 va_list args; 89 va_start(args, fmt); 90 int byteCount = vsnprintf(buf, sizeof(buf), fmt, args); 91 va_end(args); 92 if (byteCount < 0 || byteCount >= BUF_SIZE) { 93 return NULL; 94 } 95 char reply[4096]; 96 if (doCommand(ifname, buf, reply, sizeof(reply)) != 0) { 97 return NULL; 98 } 99 // TODO: why not just NewStringUTF? 100 String16 str((char *)reply); 101 return env->NewString((const jchar *)str.string(), str.size()); 102} 103 104static jboolean android_net_wifi_isDriverLoaded(JNIEnv* env, jobject) 105{ 106 return (jboolean)(::is_wifi_driver_loaded() == 1); 107} 108 109static jboolean android_net_wifi_loadDriver(JNIEnv* env, jobject) 110{ 111 return (jboolean)(::wifi_load_driver() == 0); 112} 113 114static jboolean android_net_wifi_unloadDriver(JNIEnv* env, jobject) 115{ 116 return (jboolean)(::wifi_unload_driver() == 0); 117} 118 119static jboolean android_net_wifi_startSupplicant(JNIEnv* env, jobject) 120{ 121 return (jboolean)(::wifi_start_supplicant() == 0); 122} 123 124static jboolean android_net_wifi_startP2pSupplicant(JNIEnv* env, jobject) 125{ 126 return (jboolean)(::wifi_start_p2p_supplicant() == 0); 127} 128 129static jboolean android_net_wifi_killSupplicant(JNIEnv* env, jobject) 130{ 131 return (jboolean)(::wifi_stop_supplicant() == 0); 132} 133 134static jboolean android_net_wifi_connectToSupplicant(JNIEnv* env, jobject, jstring jIface) 135{ 136 ScopedUtfChars ifname(env, jIface); 137 return (jboolean)(::wifi_connect_to_supplicant(ifname.c_str()) == 0); 138} 139 140static void android_net_wifi_closeSupplicantConnection(JNIEnv* env, jobject, jstring jIface) 141{ 142 ScopedUtfChars ifname(env, jIface); 143 ::wifi_close_supplicant_connection(ifname.c_str()); 144} 145 146static jstring android_net_wifi_waitForEvent(JNIEnv* env, jobject, jstring jIface) 147{ 148 char buf[BUF_SIZE]; 149 ScopedUtfChars ifname(env, jIface); 150 int nread = ::wifi_wait_for_event(ifname.c_str(), buf, sizeof buf); 151 if (nread > 0) { 152 return env->NewStringUTF(buf); 153 } else { 154 return NULL; 155 } 156} 157 158static jboolean android_net_wifi_doBooleanCommand(JNIEnv* env, jobject, jstring jIface, 159 jstring jCommand) 160{ 161 ScopedUtfChars ifname(env, jIface); 162 ScopedUtfChars command(env, jCommand); 163 164 if (command.c_str() == NULL) { 165 return JNI_FALSE; 166 } 167 if (DBG) LOGD("doBoolean: %s", command.c_str()); 168 return doBooleanCommand(ifname.c_str(), "OK", "%s", command.c_str()); 169} 170 171static jint android_net_wifi_doIntCommand(JNIEnv* env, jobject, jstring jIface, 172 jstring jCommand) 173{ 174 ScopedUtfChars ifname(env, jIface); 175 ScopedUtfChars command(env, jCommand); 176 177 if (command.c_str() == NULL) { 178 return -1; 179 } 180 if (DBG) LOGD("doInt: %s", command.c_str()); 181 return doIntCommand(ifname.c_str(), "%s", command.c_str()); 182} 183 184static jstring android_net_wifi_doStringCommand(JNIEnv* env, jobject, jstring jIface, 185 jstring jCommand) 186{ 187 ScopedUtfChars ifname(env, jIface); 188 189 ScopedUtfChars command(env, jCommand); 190 if (command.c_str() == NULL) { 191 return NULL; 192 } 193 if (DBG) LOGD("doString: %s", command.c_str()); 194 return doStringCommand(env, ifname.c_str(), "%s", command.c_str()); 195} 196 197 198 199// ---------------------------------------------------------------------------- 200 201/* 202 * JNI registration. 203 */ 204static JNINativeMethod gWifiMethods[] = { 205 /* name, signature, funcPtr */ 206 207 { "loadDriver", "()Z", (void *)android_net_wifi_loadDriver }, 208 { "isDriverLoaded", "()Z", (void *)android_net_wifi_isDriverLoaded }, 209 { "unloadDriver", "()Z", (void *)android_net_wifi_unloadDriver }, 210 { "startSupplicant", "()Z", (void *)android_net_wifi_startSupplicant }, 211 { "startP2pSupplicant", "()Z", (void *)android_net_wifi_startP2pSupplicant }, 212 { "killSupplicant", "()Z", (void *)android_net_wifi_killSupplicant }, 213 { "connectToSupplicant", "(Ljava/lang/String;)Z", 214 (void *)android_net_wifi_connectToSupplicant }, 215 { "closeSupplicantConnection", "(Ljava/lang/String;)V", 216 (void *)android_net_wifi_closeSupplicantConnection }, 217 { "waitForEvent", "(Ljava/lang/String;)Ljava/lang/String;", 218 (void*) android_net_wifi_waitForEvent }, 219 { "doBooleanCommand", "(Ljava/lang/String;Ljava/lang/String;)Z", 220 (void*) android_net_wifi_doBooleanCommand }, 221 { "doIntCommand", "(Ljava/lang/String;Ljava/lang/String;)I", 222 (void*) android_net_wifi_doIntCommand }, 223 { "doStringCommand", "(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;", 224 (void*) android_net_wifi_doStringCommand }, 225}; 226 227int register_android_net_wifi_WifiManager(JNIEnv* env) 228{ 229 return AndroidRuntime::registerNativeMethods(env, 230 WIFI_PKG_NAME, gWifiMethods, NELEM(gWifiMethods)); 231} 232 233}; // namespace android 234