SoftapController.cpp revision 84c65a62fe7b053fed7f20274ca7379627a87b79 
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 <linux/wireless.h>
30
31#define LOG_TAG "SoftapController"
32#include <cutils/log.h>
33
34#include "SoftapController.h"
35
36SoftapController::SoftapController() {
37    mPid = 0;
38    mSock = socket(AF_INET, SOCK_DGRAM, 0);
39    if (mSock < 0)
40        LOGE("Failed to open socket");
41    memset(mIface, 0, sizeof(mIface));
42}
43
44SoftapController::~SoftapController() {
45    if (mSock >= 0)
46        close(mSock);
47}
48
49int SoftapController::getPrivFuncNum(char *iface, const char *fname) {
50    struct iwreq wrq;
51    struct iw_priv_args *priv_ptr;
52    int i, ret;
53
54    strncpy(wrq.ifr_name, iface, sizeof(wrq.ifr_name));
55    wrq.u.data.pointer = mBuf;
56    wrq.u.data.length = sizeof(mBuf) / sizeof(struct iw_priv_args);
57    wrq.u.data.flags = 0;
58    if ((ret = ioctl(mSock, SIOCGIWPRIV, &wrq)) < 0) {
59        LOGE("SIOCGIPRIV failed: %d", ret);
60        return ret;
61    }
62    priv_ptr = (struct iw_priv_args *)wrq.u.data.pointer;
63#if 0
64    for(i=0;(i < wrq.u.data.length);i++) {
65        LOGE("%s: [%x] %s\n", __func__, priv_ptr[i].cmd, priv_ptr[i].name);
66    }
67#endif
68    for(i=0;(i < wrq.u.data.length);i++) {
69        if (strcmp(priv_ptr[i].name, fname) == 0)
70            return priv_ptr[i].cmd;
71    }
72    return -1;
73}
74
75int SoftapController::startSoftap() {
76    struct iwreq wrq;
77    pid_t pid = 1;
78    int fnum, ret = 0;
79
80    LOGD("Softap start");
81    if (mPid) {
82        LOGE("Softap already started");
83        errno = EBUSY;
84        return -1;
85    }
86    if (mSock < 0) {
87        LOGE("Failed to open socket");
88        return -1;
89    }
90#if 0
91   if ((pid = fork()) < 0) {
92        LOGE("fork failed (%s)", strerror(errno));
93        return -1;
94    }
95#endif
96    /* system("iwpriv wl0.1 AP_BSS_START"); */
97    if (!pid) {
98        /* start hostapd */
99        return ret;
100    } else {
101        LOGD("Softap Started: %s", mIface);
102        fnum = getPrivFuncNum(mIface, "AP_BSS_START");
103        if (fnum < 0) {
104            LOGE("Softap start - function not supported");
105            return -1;
106        }
107        strncpy(wrq.ifr_name, mIface, sizeof(wrq.ifr_name));
108        wrq.u.data.length = 0;
109        wrq.u.data.pointer = mBuf;
110        wrq.u.data.flags = 0;
111        ret = ioctl(mSock, fnum, &wrq);
112        if (ret) {
113            LOGE("Softap start - failed: %d", ret);
114        }
115        else {
116           mPid = pid;
117           LOGD("Softap start - Ok");
118        }
119    }
120    return ret;
121
122}
123
124int SoftapController::stopSoftap() {
125    struct iwreq wrq;
126    int fnum, ret;
127
128    LOGD("Softap stop");
129    if (mPid == 0) {
130        LOGE("Softap already stopped");
131        return 0;
132    }
133    if (mSock < 0) {
134        LOGE("Failed to open socket");
135        return -1;
136    }
137    fnum = getPrivFuncNum(mIface, "WL_AP_STOP");
138    if (fnum < 0) {
139        LOGE("Softap stop - function not supported");
140        return -1;
141    }
142    strncpy(wrq.ifr_name, mIface, sizeof(wrq.ifr_name));
143    wrq.u.data.length = 0;
144    wrq.u.data.pointer = mBuf;
145    wrq.u.data.flags = 0;
146    ret = ioctl(mSock, fnum, &wrq);
147#if 0
148    LOGD("Stopping Softap service");
149    kill(mPid, SIGTERM);
150    waitpid(mPid, NULL, 0);
151#endif
152    mPid = 0;
153    LOGD("Softap service stopped: %d", ret);
154    return ret;
155}
156
157bool SoftapController::isSoftapStarted() {
158    return (mPid != 0 ? true : false);
159}
160
161/*
162 * Arguments:
163 *      argv[2] - wlan interface
164 *      argv[3] - softap interface
165 *      argv[4] - command line
166 */
167int SoftapController::setSoftap(int argc, char *argv[]) {
168    struct iwreq wrq;
169    int fnum, ret;
170
171    LOGD("Softap set");
172    if (mSock < 0) {
173        LOGE("Failed to open socket");
174        return -1;
175    }
176    if (argc < 4) {
177        LOGE("Missing arguments");
178        return -1;
179    }
180
181    fnum = getPrivFuncNum(argv[2], "WL_AP_CFG");
182    if (fnum < 0) {
183        LOGE("Softap set - function not supported");
184        return -1;
185    }
186
187    strncpy(mIface, argv[3], sizeof(mIface));
188    strncpy(wrq.ifr_name, argv[2], sizeof(wrq.ifr_name));
189    if (argc >= 4) {
190        strncpy(mBuf, argv[4], sizeof(mBuf));
191    }
192
193    wrq.u.data.length = strlen(mBuf) + 1;
194    wrq.u.data.pointer = mBuf;
195    wrq.u.data.flags = 0;
196    /* system("iwpriv eth0 WL_AP_CFG ASCII_CMD=AP_CFG,SSID=\"AndroidAP\",SEC=\"open\",KEY=12345,CHANNEL=1,PREAMBLE=0,MAX_SCB=8,END"); */
197    ret = ioctl(mSock, fnum, &wrq);
198    if (ret) {
199        LOGE("Softap set - failed: %d", ret);
200    }
201    else {
202        LOGD("Softap set - Ok");
203    }
204    return ret;
205}
206