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
InterfaceController()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
~InterfaceController()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 */
interfaceCommand(int argc,char * argv[],char ** rbuf)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