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
40 extern "C" int bt_is_enabled();
41 #endif
42
PanController()43 PanController::PanController() {
44 mPid = 0;
45 }
46
~PanController()47 PanController::~PanController() {
48 }
49
startPan()50 int 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
stopPan()90 int 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
isPanStarted()104 bool PanController::isPanStarted() {
105 return (mPid != 0 ? true : false);
106 }
107