CommandListener.cpp revision ff2c0d8c13457e43f0d4bf06d3177271aac104c1 
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 <sys/socket.h>
19#include <sys/types.h>
20#include <netinet/in.h>
21#include <arpa/inet.h>
22#include <dirent.h>
23#include <errno.h>
24#include <string.h>
25
26#include <linux/if.h>
27
28#define LOG_TAG "CommandListener"
29#include <cutils/log.h>
30
31#include <sysutils/SocketClient.h>
32
33#include "CommandListener.h"
34#include "ResponseCode.h"
35#include "ThrottleController.h"
36
37
38extern "C" int ifc_init(void);
39extern "C" int ifc_get_hwaddr(const char *name, void *ptr);
40extern "C" int ifc_get_info(const char *name, in_addr_t *addr, in_addr_t *mask, unsigned *flags);
41extern "C" int ifc_set_addr(const char *name, in_addr_t addr);
42extern "C" int ifc_set_mask(const char *name, in_addr_t mask);
43extern "C" int ifc_up(const char *name);
44extern "C" int ifc_down(const char *name);
45
46TetherController *CommandListener::sTetherCtrl = NULL;
47NatController *CommandListener::sNatCtrl = NULL;
48PppController *CommandListener::sPppCtrl = NULL;
49PanController *CommandListener::sPanCtrl = NULL;
50SoftapController *CommandListener::sSoftapCtrl = NULL;
51UsbController *CommandListener::sUsbCtrl = NULL;
52
53CommandListener::CommandListener() :
54                 FrameworkListener("netd") {
55    registerCmd(new InterfaceCmd());
56    registerCmd(new IpFwdCmd());
57    registerCmd(new TetherCmd());
58    registerCmd(new NatCmd());
59    registerCmd(new ListTtysCmd());
60    registerCmd(new PppdCmd());
61    registerCmd(new PanCmd());
62    registerCmd(new SoftapCmd());
63    registerCmd(new UsbCmd());
64
65    if (!sTetherCtrl)
66        sTetherCtrl = new TetherController();
67    if (!sNatCtrl)
68        sNatCtrl = new NatController();
69    if (!sPppCtrl)
70        sPppCtrl = new PppController();
71    if (!sPanCtrl)
72        sPanCtrl = new PanController();
73    if (!sSoftapCtrl)
74        sSoftapCtrl = new SoftapController();
75    if (!sUsbCtrl)
76        sUsbCtrl = new UsbController();
77}
78
79CommandListener::InterfaceCmd::InterfaceCmd() :
80                 NetdCommand("interface") {
81}
82
83int CommandListener::InterfaceCmd::runCommand(SocketClient *cli,
84                                                      int argc, char **argv) {
85    if (argc < 2) {
86        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
87        return 0;
88    }
89
90    if (!strcmp(argv[1], "list")) {
91        DIR *d;
92        struct dirent *de;
93
94        if (!(d = opendir("/sys/class/net"))) {
95            cli->sendMsg(ResponseCode::OperationFailed, "Failed to open sysfs dir", true);
96            return 0;
97        }
98
99        while((de = readdir(d))) {
100            if (de->d_name[0] == '.')
101                continue;
102            cli->sendMsg(ResponseCode::InterfaceListResult, de->d_name, false);
103        }
104        closedir(d);
105        cli->sendMsg(ResponseCode::CommandOkay, "Interface list completed", false);
106        return 0;
107    } else if (!strcmp(argv[1], "readrxcounter")) {
108        if (argc != 3) {
109            cli->sendMsg(ResponseCode::CommandSyntaxError,
110                    "Usage: interface readrxcounter <interface>", false);
111            return 0;
112        }
113        unsigned long rx = 0, tx = 0;
114        if (readInterfaceCounters(argv[2], &rx, &tx)) {
115            cli->sendMsg(ResponseCode::OperationFailed, "Failed to read counters", true);
116            return 0;
117        }
118
119        char *msg;
120        asprintf(&msg, "%lu", rx);
121        cli->sendMsg(ResponseCode::InterfaceRxCounterResult, msg, false);
122        free(msg);
123
124        return 0;
125    } else if (!strcmp(argv[1], "readtxcounter")) {
126        if (argc != 3) {
127            cli->sendMsg(ResponseCode::CommandSyntaxError,
128                    "Usage: interface readtxcounter <interface>", false);
129            return 0;
130        }
131        unsigned long rx = 0, tx = 0;
132        if (readInterfaceCounters(argv[2], &rx, &tx)) {
133            cli->sendMsg(ResponseCode::OperationFailed, "Failed to read counters", true);
134            return 0;
135        }
136
137        char *msg = NULL;
138        asprintf(&msg, "%lu", tx);
139        cli->sendMsg(ResponseCode::InterfaceTxCounterResult, msg, false);
140        free(msg);
141        return 0;
142    } else if (!strcmp(argv[1], "getthrottle")) {
143        if (argc != 4 || (argc == 4 && (strcmp(argv[3], "rx") && (strcmp(argv[3], "tx"))))) {
144            cli->sendMsg(ResponseCode::CommandSyntaxError,
145                    "Usage: interface getthrottle <interface> <rx|tx>", false);
146            return 0;
147        }
148        int val = 0;
149        int rc = 0;
150        int voldRc = ResponseCode::InterfaceRxThrottleResult;
151
152        if (!strcmp(argv[3], "rx")) {
153            rc = ThrottleController::getInterfaceRxThrottle(argv[2], &val);
154        } else {
155            rc = ThrottleController::getInterfaceTxThrottle(argv[2], &val);
156            voldRc = ResponseCode::InterfaceTxThrottleResult;
157        }
158        if (rc) {
159            cli->sendMsg(ResponseCode::OperationFailed, "Failed to get throttle", true);
160        } else {
161            char *msg = NULL;
162            asprintf(&msg, "%u", val);
163            cli->sendMsg(voldRc, msg, false);
164            free(msg);
165            return 0;
166        }
167        return 0;
168    } else if (!strcmp(argv[1], "setthrottle")) {
169        if (argc != 5) {
170            cli->sendMsg(ResponseCode::CommandSyntaxError,
171                    "Usage: interface setthrottle <interface> <rx_kbps> <tx_kbps>", false);
172            return 0;
173        }
174        if (ThrottleController::setInterfaceThrottle(argv[2], atoi(argv[3]), atoi(argv[4]))) {
175            cli->sendMsg(ResponseCode::OperationFailed, "Failed to set throttle", true);
176        } else {
177            cli->sendMsg(ResponseCode::CommandOkay, "Interface throttling set", false);
178        }
179        return 0;
180    } else {
181        /*
182         * These commands take a minimum of 3 arguments
183         */
184        if (argc < 3) {
185            cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
186            return 0;
187        }
188        if (!strcmp(argv[1], "getcfg")) {
189            struct in_addr addr, mask;
190            unsigned char hwaddr[6];
191            unsigned flags = 0;
192
193            ifc_init();
194            memset(hwaddr, 0, sizeof(hwaddr));
195
196            if (ifc_get_info(argv[2], &addr.s_addr, &mask.s_addr, &flags)) {
197                cli->sendMsg(ResponseCode::OperationFailed, "Interface not found", true);
198                return 0;
199            }
200
201            if (ifc_get_hwaddr(argv[2], (void *) hwaddr)) {
202                LOGW("Failed to retrieve HW addr for %s (%s)", argv[2], strerror(errno));
203            }
204
205            char *addr_s = strdup(inet_ntoa(addr));
206            char *mask_s = strdup(inet_ntoa(mask));
207            const char *updown, *brdcst, *loopbk, *ppp, *running, *multi;
208
209            updown =  (flags & IFF_UP)           ? "up" : "down";
210            brdcst =  (flags & IFF_BROADCAST)    ? " broadcast" : "";
211            loopbk =  (flags & IFF_LOOPBACK)     ? " loopback" : "";
212            ppp =     (flags & IFF_POINTOPOINT)  ? " point-to-point" : "";
213            running = (flags & IFF_RUNNING)      ? " running" : "";
214            multi =   (flags & IFF_MULTICAST)    ? " multicast" : "";
215
216            char *flag_s;
217
218            asprintf(&flag_s, "[%s%s%s%s%s%s]", updown, brdcst, loopbk, ppp, running, multi);
219
220            char *msg = NULL;
221            asprintf(&msg, "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x %s %s %s",
222                     hwaddr[0], hwaddr[1], hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5],
223                     addr_s, mask_s, flag_s);
224
225            cli->sendMsg(ResponseCode::InterfaceGetCfgResult, msg, false);
226
227            free(addr_s);
228            free(mask_s);
229            free(flag_s);
230            free(msg);
231            return 0;
232        } else if (!strcmp(argv[1], "setcfg")) {
233            // arglist: iface addr mask [flags]
234            if (argc < 5) {
235                cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
236                return 0;
237            }
238            LOGD("Setting iface cfg");
239
240            struct in_addr addr, mask;
241            unsigned flags = 0;
242
243            if (!inet_aton(argv[3], &addr)) {
244                cli->sendMsg(ResponseCode::CommandParameterError, "Invalid address", false);
245                return 0;
246            }
247
248            if (!inet_aton(argv[4], &mask)) {
249                cli->sendMsg(ResponseCode::CommandParameterError, "Invalid netmask", false);
250                return 0;
251            }
252
253            ifc_init();
254            if (ifc_set_addr(argv[2], addr.s_addr)) {
255                cli->sendMsg(ResponseCode::OperationFailed, "Failed to set address", true);
256                return 0;
257            }
258
259            if (ifc_set_mask(argv[2], mask.s_addr)) {
260                cli->sendMsg(ResponseCode::OperationFailed, "Failed to set netmask", true);
261                return 0;
262            }
263
264            /* Process flags */
265            /* read from "[XX" arg to "YY]" arg */
266            bool bStarted = false;
267            for (int i = 5; i < argc; i++) {
268                char *flag = argv[i];
269                if (!bStarted) {
270                    if (*flag == '[') {
271                        flag++;
272                        bStarted = true;
273                    } else {
274                        continue;
275                    }
276                }
277                int len = strlen(flag);
278                if (flag[len-1] == ']') {
279                    i = argc;  // stop after this loop
280                    flag[len-1] = 0;
281                }
282                if (!strcmp(flag, "up")) {
283                    LOGD("Trying to bring up %s", argv[2]);
284                    if (ifc_up(argv[2])) {
285                        LOGE("Error upping interface");
286                        cli->sendMsg(ResponseCode::OperationFailed, "Failed to up interface", true);
287                        return 0;
288                    }
289                } else if (!strcmp(flag, "down")) {
290                    LOGD("Trying to bring down %s", argv[2]);
291                    if (ifc_down(argv[2])) {
292                        LOGE("Error downing interface");
293                        cli->sendMsg(ResponseCode::OperationFailed, "Failed to down interface", true);
294                        return 0;
295                    }
296                } else if (!strcmp(flag, "broadcast")) {
297                    LOGD("broadcast flag ignored");
298                } else if (!strcmp(flag, "multicast")) {
299                    LOGD("multicast flag ignored");
300                } else {
301                    cli->sendMsg(ResponseCode::CommandParameterError, "Flag unsupported", false);
302                    return 0;
303                }
304            }
305            cli->sendMsg(ResponseCode::CommandOkay, "Interface configuration set", false);
306            return 0;
307        } else {
308            cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown interface cmd", false);
309            return 0;
310        }
311    }
312    return 0;
313}
314
315CommandListener::ListTtysCmd::ListTtysCmd() :
316                 NetdCommand("list_ttys") {
317}
318
319int CommandListener::ListTtysCmd::runCommand(SocketClient *cli,
320                                             int argc, char **argv) {
321    TtyCollection *tlist = sPppCtrl->getTtyList();
322    TtyCollection::iterator it;
323
324    for (it = tlist->begin(); it != tlist->end(); ++it) {
325        cli->sendMsg(ResponseCode::TtyListResult, *it, false);
326    }
327
328    cli->sendMsg(ResponseCode::CommandOkay, "Ttys listed.", false);
329    return 0;
330}
331
332CommandListener::IpFwdCmd::IpFwdCmd() :
333                 NetdCommand("ipfwd") {
334}
335
336int CommandListener::IpFwdCmd::runCommand(SocketClient *cli,
337                                                      int argc, char **argv) {
338    int rc = 0;
339
340    if (argc < 2) {
341        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
342        return 0;
343    }
344
345    if (!strcmp(argv[1], "status")) {
346        char *tmp = NULL;
347
348        asprintf(&tmp, "Forwarding %s", (sTetherCtrl->getIpFwdEnabled() ? "enabled" : "disabled"));
349        cli->sendMsg(ResponseCode::IpFwdStatusResult, tmp, false);
350        free(tmp);
351        return 0;
352    } else if (!strcmp(argv[1], "enable")) {
353        rc = sTetherCtrl->setIpFwdEnabled(true);
354    } else if (!strcmp(argv[1], "disable")) {
355        rc = sTetherCtrl->setIpFwdEnabled(false);
356    } else {
357        cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown ipfwd cmd", false);
358        return 0;
359    }
360
361    if (!rc) {
362        cli->sendMsg(ResponseCode::CommandOkay, "ipfwd operation succeeded", false);
363    } else {
364        cli->sendMsg(ResponseCode::OperationFailed, "ipfwd operation failed", true);
365    }
366
367    return 0;
368}
369
370CommandListener::TetherCmd::TetherCmd() :
371                 NetdCommand("tether") {
372}
373
374int CommandListener::TetherCmd::runCommand(SocketClient *cli,
375                                                      int argc, char **argv) {
376    int rc = 0;
377
378    if (argc < 2) {
379        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
380        return 0;
381    }
382
383    if (!strcmp(argv[1], "stop")) {
384        rc = sTetherCtrl->stopTethering();
385    } else if (!strcmp(argv[1], "status")) {
386        char *tmp = NULL;
387
388        asprintf(&tmp, "Tethering services %s",
389                 (sTetherCtrl->isTetheringStarted() ? "started" : "stopped"));
390        cli->sendMsg(ResponseCode::TetherStatusResult, tmp, false);
391        free(tmp);
392        return 0;
393    } else {
394        /*
395         * These commands take a minimum of 4 arguments
396         */
397        if (argc < 4) {
398            cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
399            return 0;
400        }
401
402        if (!strcmp(argv[1], "start")) {
403            if (argc % 2 == 1) {
404                cli->sendMsg(ResponseCode::CommandSyntaxError, "Bad number of arguments", false);
405                return 0;
406            }
407
408            int num_addrs = argc - 2;
409            int arg_index = 2;
410            int array_index = 0;
411            in_addr *addrs = (in_addr *)malloc(sizeof(in_addr) * num_addrs);
412            while (array_index < num_addrs) {
413                if (!inet_aton(argv[arg_index++], &(addrs[array_index++]))) {
414                    cli->sendMsg(ResponseCode::CommandParameterError, "Invalid address", false);
415                    free(addrs);
416                    return 0;
417                }
418            }
419            rc = sTetherCtrl->startTethering(num_addrs, addrs);
420            free(addrs);
421        } else if (!strcmp(argv[1], "interface")) {
422            if (!strcmp(argv[2], "add")) {
423                rc = sTetherCtrl->tetherInterface(argv[3]);
424            } else if (!strcmp(argv[2], "remove")) {
425                rc = sTetherCtrl->untetherInterface(argv[3]);
426            } else if (!strcmp(argv[2], "list")) {
427                InterfaceCollection *ilist = sTetherCtrl->getTetheredInterfaceList();
428                InterfaceCollection::iterator it;
429
430                for (it = ilist->begin(); it != ilist->end(); ++it) {
431                    cli->sendMsg(ResponseCode::TetherInterfaceListResult, *it, false);
432                }
433            } else {
434                cli->sendMsg(ResponseCode::CommandParameterError,
435                             "Unknown tether interface operation", false);
436                return 0;
437            }
438        } else if (!strcmp(argv[1], "dns")) {
439            if (!strcmp(argv[2], "set")) {
440                rc = sTetherCtrl->setDnsForwarders(&argv[3], argc - 3);
441            } else if (!strcmp(argv[2], "list")) {
442                NetAddressCollection *dlist = sTetherCtrl->getDnsForwarders();
443                NetAddressCollection::iterator it;
444
445                for (it = dlist->begin(); it != dlist->end(); ++it) {
446                    cli->sendMsg(ResponseCode::TetherDnsFwdTgtListResult, inet_ntoa(*it), false);
447                }
448            } else {
449                cli->sendMsg(ResponseCode::CommandParameterError,
450                             "Unknown tether interface operation", false);
451                return 0;
452            }
453        } else {
454            cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown tether cmd", false);
455            return 0;
456        }
457    }
458
459    if (!rc) {
460        cli->sendMsg(ResponseCode::CommandOkay, "Tether operation succeeded", false);
461    } else {
462        cli->sendMsg(ResponseCode::OperationFailed, "Tether operation failed", true);
463    }
464
465    return 0;
466}
467
468CommandListener::NatCmd::NatCmd() :
469                 NetdCommand("nat") {
470}
471
472int CommandListener::NatCmd::runCommand(SocketClient *cli,
473                                                      int argc, char **argv) {
474    int rc = 0;
475
476    if (argc < 3) {
477        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
478        return 0;
479    }
480
481    if (!strcmp(argv[1], "enable")) {
482        rc = sNatCtrl->enableNat(argv[2], argv[3]);
483    } else if (!strcmp(argv[1], "disable")) {
484        rc = sNatCtrl->disableNat(argv[2], argv[3]);
485    } else {
486        cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown nat cmd", false);
487        return 0;
488    }
489
490    if (!rc) {
491        cli->sendMsg(ResponseCode::CommandOkay, "Nat operation succeeded", false);
492    } else {
493        cli->sendMsg(ResponseCode::OperationFailed, "Nat operation failed", true);
494    }
495
496    return 0;
497}
498
499CommandListener::PppdCmd::PppdCmd() :
500                 NetdCommand("pppd") {
501}
502
503int CommandListener::PppdCmd::runCommand(SocketClient *cli,
504                                                      int argc, char **argv) {
505    int rc = 0;
506
507    if (argc < 3) {
508        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
509        return 0;
510    }
511
512    if (!strcmp(argv[1], "attach")) {
513        struct in_addr l, r, dns1, dns2;
514
515        memset(&dns1, sizeof(struct in_addr), 0);
516        memset(&dns2, sizeof(struct in_addr), 0);
517
518        if (!inet_aton(argv[3], &l)) {
519            cli->sendMsg(ResponseCode::CommandParameterError, "Invalid local address", false);
520            return 0;
521        }
522        if (!inet_aton(argv[4], &r)) {
523            cli->sendMsg(ResponseCode::CommandParameterError, "Invalid remote address", false);
524            return 0;
525        }
526        if ((argc > 3) && (!inet_aton(argv[5], &dns1))) {
527            cli->sendMsg(ResponseCode::CommandParameterError, "Invalid dns1 address", false);
528            return 0;
529        }
530        if ((argc > 4) && (!inet_aton(argv[6], &dns2))) {
531            cli->sendMsg(ResponseCode::CommandParameterError, "Invalid dns2 address", false);
532            return 0;
533        }
534        rc = sPppCtrl->attachPppd(argv[2], l, r, dns1, dns2);
535    } else if (!strcmp(argv[1], "detach")) {
536        rc = sPppCtrl->detachPppd(argv[2]);
537    } else {
538        cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown pppd cmd", false);
539        return 0;
540    }
541
542    if (!rc) {
543        cli->sendMsg(ResponseCode::CommandOkay, "Pppd operation succeeded", false);
544    } else {
545        cli->sendMsg(ResponseCode::OperationFailed, "Pppd operation failed", true);
546    }
547
548    return 0;
549}
550
551CommandListener::PanCmd::PanCmd() :
552                 NetdCommand("pan") {
553}
554
555int CommandListener::PanCmd::runCommand(SocketClient *cli,
556                                        int argc, char **argv) {
557    int rc = 0;
558
559    if (argc < 2) {
560        cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
561        return 0;
562    }
563
564    if (!strcmp(argv[1], "start")) {
565        rc = sPanCtrl->startPan();
566    } else if (!strcmp(argv[1], "stop")) {
567        rc = sPanCtrl->stopPan();
568    } else if (!strcmp(argv[1], "status")) {
569        char *tmp = NULL;
570
571        asprintf(&tmp, "Pan services %s",
572                 (sPanCtrl->isPanStarted() ? "started" : "stopped"));
573        cli->sendMsg(ResponseCode::PanStatusResult, tmp, false);
574        free(tmp);
575        return 0;
576    } else {
577        cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown pan cmd", false);
578        return 0;
579    }
580
581    if (!rc) {
582        cli->sendMsg(ResponseCode::CommandOkay, "Pan operation succeeded", false);
583    } else {
584        cli->sendMsg(ResponseCode::OperationFailed, "Pan operation failed", true);
585    }
586
587    return 0;
588}
589
590CommandListener::SoftapCmd::SoftapCmd() :
591                 NetdCommand("softap") {
592}
593
594int CommandListener::SoftapCmd::runCommand(SocketClient *cli,
595                                        int argc, char **argv) {
596    int rc = 0, flag = 0;
597
598    if (argc < 2) {
599        cli->sendMsg(ResponseCode::CommandSyntaxError, "Softap Missing argument", false);
600        return 0;
601    }
602
603    if (!strcmp(argv[1], "start")) {
604        rc = sSoftapCtrl->startDriver(argv[2]);
605    } else if (!strcmp(argv[1], "stop")) {
606        rc = sSoftapCtrl->stopDriver(argv[2]);
607    } else if (!strcmp(argv[1], "startap")) {
608        rc = sSoftapCtrl->startSoftap();
609    } else if (!strcmp(argv[1], "stopap")) {
610        rc = sSoftapCtrl->stopSoftap();
611    } else if (!strcmp(argv[1], "fwreload")) {
612        rc = sSoftapCtrl->fwReloadSoftap(argc, argv);
613    } else if (!strcmp(argv[1], "status")) {
614        char *tmp = NULL;
615
616        asprintf(&tmp, "Softap service %s",
617                 (sSoftapCtrl->isSoftapStarted() ? "started" : "stopped"));
618        cli->sendMsg(ResponseCode::SoftapStatusResult, tmp, false);
619        free(tmp);
620        return 0;
621    } else if (!strcmp(argv[1], "set")) {
622        rc = sSoftapCtrl->setSoftap(argc, argv);
623    } else {
624        cli->sendMsg(ResponseCode::CommandSyntaxError, "Softap Unknown cmd", false);
625        return 0;
626    }
627
628    if (!rc) {
629        cli->sendMsg(ResponseCode::CommandOkay, "Softap operation succeeded", false);
630    } else {
631        cli->sendMsg(ResponseCode::OperationFailed, "Softap operation failed", true);
632    }
633
634    return 0;
635}
636
637CommandListener::UsbCmd::UsbCmd() :
638                 NetdCommand("usb") {
639}
640
641int CommandListener::UsbCmd::runCommand(SocketClient *cli, int argc, char **argv) {
642    int rc = 0;
643
644    if (argc < 2) {
645        cli->sendMsg(ResponseCode::CommandSyntaxError, "Usb Missing argument", false);
646        return 0;
647    }
648
649    if (!strcmp(argv[1], "startrndis")) {
650        rc = sUsbCtrl->startRNDIS();
651    } else if (!strcmp(argv[1], "stoprndis")) {
652        rc = sUsbCtrl->stopRNDIS();
653    } else if (!strcmp(argv[1], "rndisstatus")) {
654        char *tmp = NULL;
655
656        asprintf(&tmp, "Usb RNDIS %s",
657                (sUsbCtrl->isRNDISStarted() ? "started" : "stopped"));
658        cli->sendMsg(ResponseCode::UsbRNDISStatusResult, tmp, false);
659        free(tmp);
660        return 0;
661    } else {
662        cli->sendMsg(ResponseCode::CommandSyntaxError, "Usb Unknown cmd", false);
663        return 0;
664    }
665
666    if (!rc) {
667        cli->sendMsg(ResponseCode::CommandOkay, "Usb operation succeeded", false);
668    } else {
669        cli->sendMsg(ResponseCode::OperationFailed, "Softap operation failed", true);
670    }
671
672    return 0;
673}
674
675int CommandListener::readInterfaceCounters(const char *iface, unsigned long *rx, unsigned long *tx) {
676    FILE *fp = fopen("/proc/net/dev", "r");
677    if (!fp) {
678        LOGE("Failed to open /proc/net/dev (%s)", strerror(errno));
679        return -1;
680    }
681
682    char buffer[512];
683
684    fgets(buffer, sizeof(buffer), fp); // Header 1
685    fgets(buffer, sizeof(buffer), fp); // Header 2
686    while(fgets(buffer, sizeof(buffer), fp)) {
687        buffer[strlen(buffer)-1] = '\0';
688
689        char name[31];
690        unsigned long d;
691        sscanf(buffer, "%30s %lu %lu %lu %lu %lu %lu %lu %lu %lu",
692                name, rx, &d, &d, &d, &d, &d, &d, &d, tx);
693        char *rxString = strchr(name, ':');
694        *rxString = '\0';
695        rxString++;
696        // when the rx count gets too big it changes from "name: 999" to "name:1000"
697        // and the sscanf munge the two together.  Detect that and fix
698        // note that all the %lu will be off by one and the real tx value will be in d
699        if (*rxString != '\0') {
700            *tx = d;
701            sscanf(rxString, "%20lu", rx);
702        }
703        if (strcmp(name, iface)) {
704            continue;
705        }
706        fclose(fp);
707        return 0;
708    }
709
710    fclose(fp);
711    *rx = 0;
712    *tx = 0;
713    return 0;
714}
715