1/* 2 * Copyright (C) 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#include <stdlib.h> 18#include <errno.h> 19#include <fcntl.h> 20#include <string.h> 21 22#include <sys/socket.h> 23#include <sys/stat.h> 24#include <sys/types.h> 25#include <sys/wait.h> 26 27#include <netinet/in.h> 28#include <arpa/inet.h> 29 30#ifdef HAVE_BLUETOOTH 31#include <bluedroid/bluetooth.h> 32#endif 33 34#define LOG_TAG "PanController" 35#include <cutils/log.h> 36 37#include "PanController.h" 38 39#ifdef HAVE_BLUETOOTH 40extern "C" int bt_is_enabled(); 41#endif 42 43PanController::PanController() { 44 mPid = 0; 45} 46 47PanController::~PanController() { 48} 49 50int PanController::startPan() { 51 pid_t pid; 52 53#ifdef HAVE_BLUETOOTH 54 if (!bt_is_enabled()) { 55 LOGE("Cannot start PAN services - Bluetooth not running"); 56 errno = ENODEV; 57 return -1; 58 } 59#else 60 LOGE("Cannot start PAN services - No Bluetooth support"); 61 errno = ENODEV; 62 return -1; 63#endif 64 65 if (mPid) { 66 LOGE("PAN already started"); 67 errno = EBUSY; 68 return -1; 69 } 70 71 if ((pid = fork()) < 0) { 72 LOGE("fork failed (%s)", strerror(errno)); 73 return -1; 74 } 75 76 if (!pid) { 77 if (execl("/system/bin/pand", "/system/bin/pand", "--nodetach", "--listen", 78 "--role", "NAP", (char *) NULL)) { 79 LOGE("execl failed (%s)", strerror(errno)); 80 } 81 LOGE("Should never get here!"); 82 return 0; 83 } else { 84 mPid = pid; 85 } 86 return 0; 87 88} 89 90int PanController::stopPan() { 91 if (mPid == 0) { 92 LOGE("PAN already stopped"); 93 return 0; 94 } 95 96 LOGD("Stopping PAN services"); 97 kill(mPid, SIGTERM); 98 waitpid(mPid, NULL, 0); 99 mPid = 0; 100 LOGD("PAN services stopped"); 101 return 0; 102} 103 104bool PanController::isPanStarted() { 105 return (mPid != 0 ? true : false); 106} 107