SoftapController.cpp revision a2d7e3e7d6e3f163f06e522378c6e2bd5cee28f8 
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#include <openssl/evp.h>
32#include <openssl/sha.h>
33
34#define LOG_TAG "SoftapController"
35#include <cutils/log.h>
36
37#include "SoftapController.h"
38
39SoftapController::SoftapController() {
40    mPid = 0;
41    mSock = socket(AF_INET, SOCK_DGRAM, 0);
42    if (mSock < 0)
43        LOGE("Failed to open socket");
44    memset(mIface, 0, sizeof(mIface));
45}
46
47SoftapController::~SoftapController() {
48    if (mSock >= 0)
49        close(mSock);
50}
51
52int SoftapController::getPrivFuncNum(char *iface, const char *fname) {
53    struct iwreq wrq;
54    struct iw_priv_args *priv_ptr;
55    int i, ret;
56
57    strncpy(wrq.ifr_name, iface, sizeof(wrq.ifr_name));
58    wrq.u.data.pointer = mBuf;
59    wrq.u.data.length = sizeof(mBuf) / sizeof(struct iw_priv_args);
60    wrq.u.data.flags = 0;
61    if ((ret = ioctl(mSock, SIOCGIWPRIV, &wrq)) < 0) {
62        LOGE("SIOCGIPRIV failed: %d", ret);
63        return ret;
64    }
65    priv_ptr = (struct iw_priv_args *)wrq.u.data.pointer;
66    for(i=0;(i < wrq.u.data.length);i++) {
67        if (strcmp(priv_ptr[i].name, fname) == 0)
68            return priv_ptr[i].cmd;
69    }
70    return -1;
71}
72
73int SoftapController::startDriver(char *iface) {
74    struct iwreq wrq;
75    int fnum, ret;
76
77    if (mSock < 0) {
78        LOGE("Softap start - failed to open socket");
79        return -1;
80    }
81    if (!iface || (iface[0] == '\0')) {
82        LOGD("Softap start - wrong interface");
83        iface = mIface;
84    }
85    fnum = getPrivFuncNum(iface, "START");
86    if (fnum < 0) {
87        LOGE("Softap start - function not supported");
88        return -1;
89    }
90    strncpy(wrq.ifr_name, iface, sizeof(wrq.ifr_name));
91    wrq.u.data.length = 0;
92    wrq.u.data.pointer = mBuf;
93    wrq.u.data.flags = 0;
94    ret = ioctl(mSock, fnum, &wrq);
95    LOGD("Softap start: %d", ret);
96    return ret;
97}
98
99int SoftapController::stopDriver(char *iface) {
100    struct iwreq wrq;
101    int fnum, ret;
102
103    if (mSock < 0) {
104        LOGE("Softap stop - failed to open socket");
105        return -1;
106    }
107    if (!iface || (iface[0] == '\0')) {
108        LOGD("Softap start - wrong interface");
109        iface = mIface;
110    }
111    fnum = getPrivFuncNum(iface, "STOP");
112    if (fnum < 0) {
113        LOGE("Softap stop - function not supported");
114        return -1;
115    }
116    strncpy(wrq.ifr_name, iface, sizeof(wrq.ifr_name));
117    wrq.u.data.length = 0;
118    wrq.u.data.pointer = mBuf;
119    wrq.u.data.flags = 0;
120    ret = ioctl(mSock, fnum, &wrq);
121    LOGD("Softap stop: %d", ret);
122    return ret;
123}
124
125int SoftapController::startSoftap() {
126    struct iwreq wrq;
127    pid_t pid = 1;
128    int fnum, ret = 0;
129
130    if (mPid) {
131        LOGE("Softap already started");
132        errno = EBUSY;
133        return -1;
134    }
135    if (mSock < 0) {
136        LOGE("Softap startap - failed to open socket");
137        return -1;
138    }
139#if 0
140   if ((pid = fork()) < 0) {
141        LOGE("fork failed (%s)", strerror(errno));
142        return -1;
143    }
144#endif
145    /* system("iwpriv wl0.1 AP_BSS_START"); */
146    if (!pid) {
147        /* start hostapd */
148        return ret;
149    } else {
150        fnum = getPrivFuncNum(mIface, "AP_BSS_START");
151        if (fnum < 0) {
152            LOGE("Softap startap - function not supported");
153            return -1;
154        }
155        strncpy(wrq.ifr_name, mIface, sizeof(wrq.ifr_name));
156        wrq.u.data.length = 0;
157        wrq.u.data.pointer = mBuf;
158        wrq.u.data.flags = 0;
159        ret = ioctl(mSock, fnum, &wrq);
160        if (ret) {
161            LOGE("Softap startap - failed: %d", ret);
162        }
163        else {
164           mPid = pid;
165           LOGD("Softap startap - Ok");
166        }
167    }
168    return ret;
169
170}
171
172int SoftapController::stopSoftap() {
173    struct iwreq wrq;
174    int fnum, ret;
175
176    if (mPid == 0) {
177        LOGE("Softap already stopped");
178        return 0;
179    }
180    if (mSock < 0) {
181        LOGE("Softap stopap - failed to open socket");
182        return -1;
183    }
184    fnum = getPrivFuncNum(mIface, "AP_BSS_STOP");
185    if (fnum < 0) {
186        LOGE("Softap stopap - function not supported");
187        return -1;
188    }
189    strncpy(wrq.ifr_name, mIface, sizeof(wrq.ifr_name));
190    wrq.u.data.length = 0;
191    wrq.u.data.pointer = mBuf;
192    wrq.u.data.flags = 0;
193    ret = ioctl(mSock, fnum, &wrq);
194#if 0
195    LOGD("Stopping Softap service");
196    kill(mPid, SIGTERM);
197    waitpid(mPid, NULL, 0);
198#endif
199    mPid = 0;
200    LOGD("Softap service stopped: %d", ret);
201    return ret;
202}
203
204bool SoftapController::isSoftapStarted() {
205    return (mPid != 0 ? true : false);
206}
207
208int SoftapController::addParam(int pos, const char *cmd, const char *arg)
209{
210    if (pos < 0)
211        return pos;
212    if ((unsigned)(pos + strlen(cmd) + strlen(arg) + 1) >= sizeof(mBuf)) {
213        LOGE("Command line is too big");
214        return -1;
215    }
216    pos += sprintf(&mBuf[pos], "%s=%s,", cmd, arg);
217    return pos;
218}
219
220/*
221 * Arguments:
222 *      argv[2] - wlan interface
223 *      argv[3] - softap interface
224 *      argv[4] - SSID
225 *	argv[5] - Security
226 *	argv[6] - Key
227 *	argv[7] - Channel
228 *	argv[8] - Preamble
229 *	argv[9] - Max SCB
230 */
231int SoftapController::setSoftap(int argc, char *argv[]) {
232    unsigned char psk[SHA256_DIGEST_LENGTH];
233    char psk_str[2*SHA256_DIGEST_LENGTH+1];
234    struct iwreq wrq;
235    int fnum, ret, i = 0;
236    char *ssid;
237
238    if (mSock < 0) {
239        LOGE("Softap set - failed to open socket");
240        return -1;
241    }
242    if (argc < 4) {
243        LOGE("Softap set - missing arguments");
244        return -1;
245    }
246
247    fnum = getPrivFuncNum(argv[2], "AP_SET_CFG");
248    if (fnum < 0) {
249        LOGE("Softap set - function not supported");
250        return -1;
251    }
252
253    strncpy(mIface, argv[3], sizeof(mIface));
254    strncpy(wrq.ifr_name, argv[2], sizeof(wrq.ifr_name));
255
256    /* Create command line */
257    i = addParam(i, "ASCII_CMD", "AP_CFG");
258    if (argc > 4) {
259        ssid = argv[4];
260    } else {
261        ssid = (char *)"AndroidAP";
262    }
263    i = addParam(i, "SSID", ssid);
264    if (argc > 5) {
265        i = addParam(i, "SEC", argv[5]);
266    } else {
267        i = addParam(i, "SEC", "open");
268    }
269    if (argc > 6) {
270        int j;
271        // Use the PKCS#5 PBKDF2 with 4096 iterations
272        PKCS5_PBKDF2_HMAC_SHA1(argv[6], strlen(argv[6]),
273                reinterpret_cast<const unsigned char *>(ssid), strlen(ssid),
274                4096, SHA256_DIGEST_LENGTH, psk);
275        for (j=0; j < SHA256_DIGEST_LENGTH; j++) {
276            sprintf(&psk_str[j<<1], "%02x", psk[j]);
277        }
278        psk_str[j<<1] = '\0';
279        i = addParam(i, "KEY", psk_str);
280    } else {
281        i = addParam(i, "KEY", "12345678");
282    }
283    if (argc > 7) {
284        i = addParam(i, "CHANNEL", argv[7]);
285    } else {
286        i = addParam(i, "CHANNEL", "6");
287    }
288    if (argc > 8) {
289        i = addParam(i, "PREAMBLE", argv[8]);
290    } else {
291        i = addParam(i, "PREAMBLE", "0");
292    }
293    if (argc > 9) {
294        i = addParam(i, "MAX_SCB", argv[9]);
295    } else {
296        i = addParam(i, "MAX_SCB", "8");
297    }
298    if ((i < 0) || ((unsigned)(i + 4) >= sizeof(mBuf))) {
299        LOGE("Softap set - command is too big");
300        return i;
301    }
302    sprintf(&mBuf[i], "END");
303
304    wrq.u.data.length = strlen(mBuf) + 1;
305    wrq.u.data.pointer = mBuf;
306    wrq.u.data.flags = 0;
307    /* system("iwpriv eth0 WL_AP_CFG ASCII_CMD=AP_CFG,SSID=\"AndroidAP\",SEC=\"open\",KEY=12345,CHANNEL=1,PREAMBLE=0,MAX_SCB=8,END"); */
308    ret = ioctl(mSock, fnum, &wrq);
309    if (ret) {
310        LOGE("Softap set - failed: %d", ret);
311    }
312    else {
313        LOGD("Softap set - Ok");
314    }
315    return ret;
316}
317
318/*
319 * Arguments:
320 *	argv[2] - interface name
321 *	argv[3] - AP or STA
322 */
323int SoftapController::fwReloadSoftap(int argc, char *argv[])
324{
325    struct iwreq wrq;
326    int fnum, ret, i = 0;
327    char *iface;
328
329    if (mSock < 0) {
330        LOGE("Softap fwrealod - failed to open socket");
331        return -1;
332    }
333    if (argc < 4) {
334        LOGE("Softap fwreload - missing arguments");
335        return -1;
336    }
337
338    iface = argv[2];
339    fnum = getPrivFuncNum(iface, "WL_FW_RELOAD");
340    if (fnum < 0) {
341        LOGE("Softap fwReload - function not supported");
342        return -1;
343    }
344
345    if (strcmp(argv[3], "AP") == 0) {
346#ifdef WIFI_DRIVER_FW_AP_PATH
347        sprintf(mBuf, "FW_PATH=%s", WIFI_DRIVER_FW_AP_PATH);
348#endif
349    } else {
350#ifdef WIFI_DRIVER_FW_STA_PATH
351        sprintf(mBuf, "FW_PATH=%s", WIFI_DRIVER_FW_STA_PATH);
352#endif
353    }
354    strncpy(wrq.ifr_name, iface, sizeof(wrq.ifr_name));
355    wrq.u.data.length = strlen(mBuf) + 1;
356    wrq.u.data.pointer = mBuf;
357    wrq.u.data.flags = 0;
358    ret = ioctl(mSock, fnum, &wrq);
359    if (ret) {
360        LOGE("Softap fwReload - failed: %d", ret);
361    }
362    else {
363        LOGD("Softap fwReload - Ok");
364    }
365    return ret;
366}
367