1 /* 2 * Copyright (C) 2012 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 <dlfcn.h> 23 24 #include <sys/socket.h> 25 #include <sys/stat.h> 26 #include <sys/ioctl.h> 27 #include <sys/types.h> 28 29 #include <netinet/in.h> 30 #include <arpa/inet.h> 31 32 #define LOG_TAG "InterfaceController" 33 #include <cutils/log.h> 34 #include <netutils/ifc.h> 35 #include <private/android_filesystem_config.h> 36 37 #include "InterfaceController.h" 38 39 char if_cmd_lib_file_name[] = "/system/lib/libnetcmdiface.so"; 40 char set_cmd_func_name[] = "net_iface_send_command"; 41 char set_cmd_init_func_name[] = "net_iface_send_command_init"; 42 char set_cmd_fini_func_name[] = "net_iface_send_command_fini"; 43 44 InterfaceController::InterfaceController() 45 : sendCommand_(NULL) { 46 libh_ = dlopen(if_cmd_lib_file_name, RTLD_NOW | RTLD_LOCAL); 47 if (libh_ == NULL) { 48 const char *err_str = dlerror(); 49 ALOGW("Warning (%s) while opening the net interface command library", err_str ? err_str : "unknown"); 50 } else { 51 sendCommandInit_ = (int (*)(void))dlsym(libh_, set_cmd_init_func_name); 52 if (sendCommandInit_ == NULL) { 53 const char *err_str = dlerror(); 54 ALOGW("Error (%s) while searching for the interface command init function", err_str ? err_str : "unknown"); 55 } else if (sendCommandInit_()) { 56 ALOGE("Can't init the interface command API"); 57 return; 58 } 59 sendCommandFini_ = (int (*)(void))dlsym(libh_, set_cmd_fini_func_name); 60 if (sendCommandFini_ == NULL) { 61 const char *err_str = dlerror(); 62 ALOGW("Error (%s) while searching for the interface command fini function", err_str ? err_str : "unknown"); 63 } 64 sendCommand_ = (int (*)(int, char **, char **))dlsym(libh_, set_cmd_func_name); 65 if (sendCommand_ == NULL) { 66 const char *err_str = dlerror(); 67 ALOGE("Error (%s) while searching for the interface command function", err_str ? err_str : "unknown"); 68 return; 69 } 70 } 71 } 72 73 InterfaceController::~InterfaceController() { 74 if (sendCommandFini_) { 75 if (sendCommandFini_()) { 76 ALOGE("Can't shutdown the interface command API"); 77 } 78 } 79 if (libh_) { 80 int err = dlclose(libh_); 81 if (err) { 82 const char *err_str = dlerror(); 83 ALOGE("Error (%s) while closing the net interface command library", err_str ? err_str : "unknown"); 84 } 85 } 86 } 87 88 /* 89 * Arguments: 90 * argv[2] - wlan interface 91 * argv[3] - command 92 * argv[4] - argument 93 * rbuf - returned buffer 94 */ 95 int InterfaceController::interfaceCommand(int argc, char *argv[], char **rbuf) { 96 int ret = -ENOSYS; 97 if (sendCommand_) 98 ret = sendCommand_(argc, argv, rbuf); 99 100 return ret; 101 } 102
