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