adb.c revision ff9d3484e6c8f2f7e7e25581cb4dc86e0884d8a7 
1/*
2 * Copyright (C) 2007 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#define  TRACE_TAG   TRACE_ADB
18
19#include <stdio.h>
20#include <stdlib.h>
21#include <ctype.h>
22#include <stdarg.h>
23#include <errno.h>
24#include <string.h>
25#include <time.h>
26#include <sys/time.h>
27
28#include "sysdeps.h"
29#include "adb.h"
30
31#if !ADB_HOST
32#include <private/android_filesystem_config.h>
33#include <linux/capability.h>
34#include <linux/prctl.h>
35#else
36#include "usb_vendors.h"
37#endif
38
39#if ADB_TRACE
40ADB_MUTEX_DEFINE( D_lock );
41#endif
42
43int HOST = 0;
44
45static const char *adb_device_banner = "device";
46
47void fatal(const char *fmt, ...)
48{
49    va_list ap;
50    va_start(ap, fmt);
51    fprintf(stderr, "error: ");
52    vfprintf(stderr, fmt, ap);
53    fprintf(stderr, "\n");
54    va_end(ap);
55    exit(-1);
56}
57
58void fatal_errno(const char *fmt, ...)
59{
60    va_list ap;
61    va_start(ap, fmt);
62    fprintf(stderr, "error: %s: ", strerror(errno));
63    vfprintf(stderr, fmt, ap);
64    fprintf(stderr, "\n");
65    va_end(ap);
66    exit(-1);
67}
68
69int   adb_trace_mask;
70
71/* read a comma/space/colum/semi-column separated list of tags
72 * from the ADB_TRACE environment variable and build the trace
73 * mask from it. note that '1' and 'all' are special cases to
74 * enable all tracing
75 */
76void  adb_trace_init(void)
77{
78    const char*  p = getenv("ADB_TRACE");
79    const char*  q;
80
81    static const struct {
82        const char*  tag;
83        int           flag;
84    } tags[] = {
85        { "1", 0 },
86        { "all", 0 },
87        { "adb", TRACE_ADB },
88        { "sockets", TRACE_SOCKETS },
89        { "packets", TRACE_PACKETS },
90        { "rwx", TRACE_RWX },
91        { "usb", TRACE_USB },
92        { "sync", TRACE_SYNC },
93        { "sysdeps", TRACE_SYSDEPS },
94        { "transport", TRACE_TRANSPORT },
95        { "jdwp", TRACE_JDWP },
96        { "services", TRACE_SERVICES },
97        { NULL, 0 }
98    };
99
100    if (p == NULL)
101            return;
102
103    /* use a comma/column/semi-colum/space separated list */
104    while (*p) {
105        int  len, tagn;
106
107        q = strpbrk(p, " ,:;");
108        if (q == NULL) {
109            q = p + strlen(p);
110        }
111        len = q - p;
112
113        for (tagn = 0; tags[tagn].tag != NULL; tagn++)
114        {
115            int  taglen = strlen(tags[tagn].tag);
116
117            if (len == taglen && !memcmp(tags[tagn].tag, p, len) )
118            {
119                int  flag = tags[tagn].flag;
120                if (flag == 0) {
121                    adb_trace_mask = ~0;
122                    return;
123                }
124                adb_trace_mask |= (1 << flag);
125                break;
126            }
127        }
128        p = q;
129        if (*p)
130            p++;
131    }
132}
133
134
135apacket *get_apacket(void)
136{
137    apacket *p = malloc(sizeof(apacket));
138    if(p == 0) fatal("failed to allocate an apacket");
139    memset(p, 0, sizeof(apacket) - MAX_PAYLOAD);
140    return p;
141}
142
143void put_apacket(apacket *p)
144{
145    free(p);
146}
147
148void handle_online(void)
149{
150    D("adb: online\n");
151}
152
153void handle_offline(atransport *t)
154{
155    D("adb: offline\n");
156    //Close the associated usb
157    run_transport_disconnects(t);
158}
159
160#if TRACE_PACKETS
161#define DUMPMAX 32
162void print_packet(const char *label, apacket *p)
163{
164    char *tag;
165    char *x;
166    unsigned count;
167
168    switch(p->msg.command){
169    case A_SYNC: tag = "SYNC"; break;
170    case A_CNXN: tag = "CNXN" ; break;
171    case A_OPEN: tag = "OPEN"; break;
172    case A_OKAY: tag = "OKAY"; break;
173    case A_CLSE: tag = "CLSE"; break;
174    case A_WRTE: tag = "WRTE"; break;
175    default: tag = "????"; break;
176    }
177
178    fprintf(stderr, "%s: %s %08x %08x %04x \"",
179            label, tag, p->msg.arg0, p->msg.arg1, p->msg.data_length);
180    count = p->msg.data_length;
181    x = (char*) p->data;
182    if(count > DUMPMAX) {
183        count = DUMPMAX;
184        tag = "\n";
185    } else {
186        tag = "\"\n";
187    }
188    while(count-- > 0){
189        if((*x >= ' ') && (*x < 127)) {
190            fputc(*x, stderr);
191        } else {
192            fputc('.', stderr);
193        }
194        x++;
195    }
196    fprintf(stderr, tag);
197}
198#endif
199
200static void send_ready(unsigned local, unsigned remote, atransport *t)
201{
202    D("Calling send_ready \n");
203    apacket *p = get_apacket();
204    p->msg.command = A_OKAY;
205    p->msg.arg0 = local;
206    p->msg.arg1 = remote;
207    send_packet(p, t);
208}
209
210static void send_close(unsigned local, unsigned remote, atransport *t)
211{
212    D("Calling send_close \n");
213    apacket *p = get_apacket();
214    p->msg.command = A_CLSE;
215    p->msg.arg0 = local;
216    p->msg.arg1 = remote;
217    send_packet(p, t);
218}
219
220static void send_connect(atransport *t)
221{
222    D("Calling send_connect \n");
223    apacket *cp = get_apacket();
224    cp->msg.command = A_CNXN;
225    cp->msg.arg0 = A_VERSION;
226    cp->msg.arg1 = MAX_PAYLOAD;
227    snprintf((char*) cp->data, sizeof cp->data, "%s::",
228            HOST ? "host" : adb_device_banner);
229    cp->msg.data_length = strlen((char*) cp->data) + 1;
230    send_packet(cp, t);
231#if ADB_HOST
232        /* XXX why sleep here? */
233    // allow the device some time to respond to the connect message
234    adb_sleep_ms(1000);
235#endif
236}
237
238static char *connection_state_name(atransport *t)
239{
240    if (t == NULL) {
241        return "unknown";
242    }
243
244    switch(t->connection_state) {
245    case CS_BOOTLOADER:
246        return "bootloader";
247    case CS_DEVICE:
248        return "device";
249    case CS_OFFLINE:
250        return "offline";
251    default:
252        return "unknown";
253    }
254}
255
256void parse_banner(char *banner, atransport *t)
257{
258    char *type, *product, *end;
259
260    D("parse_banner: %s\n", banner);
261    type = banner;
262    product = strchr(type, ':');
263    if(product) {
264        *product++ = 0;
265    } else {
266        product = "";
267    }
268
269        /* remove trailing ':' */
270    end = strchr(product, ':');
271    if(end) *end = 0;
272
273        /* save product name in device structure */
274    if (t->product == NULL) {
275        t->product = strdup(product);
276    } else if (strcmp(product, t->product) != 0) {
277        free(t->product);
278        t->product = strdup(product);
279    }
280
281    if(!strcmp(type, "bootloader")){
282        D("setting connection_state to CS_BOOTLOADER\n");
283        t->connection_state = CS_BOOTLOADER;
284        update_transports();
285        return;
286    }
287
288    if(!strcmp(type, "device")) {
289        D("setting connection_state to CS_DEVICE\n");
290        t->connection_state = CS_DEVICE;
291        update_transports();
292        return;
293    }
294
295    if(!strcmp(type, "recovery")) {
296        D("setting connection_state to CS_RECOVERY\n");
297        t->connection_state = CS_RECOVERY;
298        update_transports();
299        return;
300    }
301
302    t->connection_state = CS_HOST;
303}
304
305void handle_packet(apacket *p, atransport *t)
306{
307    asocket *s;
308
309    D("handle_packet() %c%c%c%c\n", ((char*) (&(p->msg.command)))[0],
310            ((char*) (&(p->msg.command)))[1],
311            ((char*) (&(p->msg.command)))[2],
312            ((char*) (&(p->msg.command)))[3]);
313    print_packet("recv", p);
314
315    switch(p->msg.command){
316    case A_SYNC:
317        if(p->msg.arg0){
318            send_packet(p, t);
319            if(HOST) send_connect(t);
320        } else {
321            t->connection_state = CS_OFFLINE;
322            handle_offline(t);
323            send_packet(p, t);
324        }
325        return;
326
327    case A_CNXN: /* CONNECT(version, maxdata, "system-id-string") */
328            /* XXX verify version, etc */
329        if(t->connection_state != CS_OFFLINE) {
330            t->connection_state = CS_OFFLINE;
331            handle_offline(t);
332        }
333        parse_banner((char*) p->data, t);
334        handle_online();
335        if(!HOST) send_connect(t);
336        break;
337
338    case A_OPEN: /* OPEN(local-id, 0, "destination") */
339        if(t->connection_state != CS_OFFLINE) {
340            char *name = (char*) p->data;
341            name[p->msg.data_length > 0 ? p->msg.data_length - 1 : 0] = 0;
342            s = create_local_service_socket(name);
343            if(s == 0) {
344                send_close(0, p->msg.arg0, t);
345            } else {
346                s->peer = create_remote_socket(p->msg.arg0, t);
347                s->peer->peer = s;
348                send_ready(s->id, s->peer->id, t);
349                s->ready(s);
350            }
351        }
352        break;
353
354    case A_OKAY: /* READY(local-id, remote-id, "") */
355        if(t->connection_state != CS_OFFLINE) {
356            if((s = find_local_socket(p->msg.arg1))) {
357                if(s->peer == 0) {
358                    s->peer = create_remote_socket(p->msg.arg0, t);
359                    s->peer->peer = s;
360                }
361                s->ready(s);
362            }
363        }
364        break;
365
366    case A_CLSE: /* CLOSE(local-id, remote-id, "") */
367        if(t->connection_state != CS_OFFLINE) {
368            if((s = find_local_socket(p->msg.arg1))) {
369                s->close(s);
370            }
371        }
372        break;
373
374    case A_WRTE:
375        if(t->connection_state != CS_OFFLINE) {
376            if((s = find_local_socket(p->msg.arg1))) {
377                unsigned rid = p->msg.arg0;
378                p->len = p->msg.data_length;
379
380                if(s->enqueue(s, p) == 0) {
381                    D("Enqueue the socket\n");
382                    send_ready(s->id, rid, t);
383                }
384                return;
385            }
386        }
387        break;
388
389    default:
390        printf("handle_packet: what is %08x?!\n", p->msg.command);
391    }
392
393    put_apacket(p);
394}
395
396alistener listener_list = {
397    .next = &listener_list,
398    .prev = &listener_list,
399};
400
401static void ss_listener_event_func(int _fd, unsigned ev, void *_l)
402{
403    asocket *s;
404
405    if(ev & FDE_READ) {
406        struct sockaddr addr;
407        socklen_t alen;
408        int fd;
409
410        alen = sizeof(addr);
411        fd = adb_socket_accept(_fd, &addr, &alen);
412        if(fd < 0) return;
413
414        adb_socket_setbufsize(fd, CHUNK_SIZE);
415
416        s = create_local_socket(fd);
417        if(s) {
418            connect_to_smartsocket(s);
419            return;
420        }
421
422        adb_close(fd);
423    }
424}
425
426static void listener_event_func(int _fd, unsigned ev, void *_l)
427{
428    alistener *l = _l;
429    asocket *s;
430
431    if(ev & FDE_READ) {
432        struct sockaddr addr;
433        socklen_t alen;
434        int fd;
435
436        alen = sizeof(addr);
437        fd = adb_socket_accept(_fd, &addr, &alen);
438        if(fd < 0) return;
439
440        s = create_local_socket(fd);
441        if(s) {
442            s->transport = l->transport;
443            connect_to_remote(s, l->connect_to);
444            return;
445        }
446
447        adb_close(fd);
448    }
449}
450
451static void  free_listener(alistener*  l)
452{
453    if (l->next) {
454        l->next->prev = l->prev;
455        l->prev->next = l->next;
456        l->next = l->prev = l;
457    }
458
459    // closes the corresponding fd
460    fdevent_remove(&l->fde);
461
462    if (l->local_name)
463        free((char*)l->local_name);
464
465    if (l->connect_to)
466        free((char*)l->connect_to);
467
468    if (l->transport) {
469        remove_transport_disconnect(l->transport, &l->disconnect);
470    }
471    free(l);
472}
473
474static void listener_disconnect(void*  _l, atransport*  t)
475{
476    alistener*  l = _l;
477
478    free_listener(l);
479}
480
481int local_name_to_fd(const char *name)
482{
483    int port;
484
485    if(!strncmp("tcp:", name, 4)){
486        int  ret;
487        port = atoi(name + 4);
488        ret = socket_loopback_server(port, SOCK_STREAM);
489        return ret;
490    }
491#ifndef HAVE_WIN32_IPC  /* no Unix-domain sockets on Win32 */
492    // It's non-sensical to support the "reserved" space on the adb host side
493    if(!strncmp(name, "local:", 6)) {
494        return socket_local_server(name + 6,
495                ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_STREAM);
496    } else if(!strncmp(name, "localabstract:", 14)) {
497        return socket_local_server(name + 14,
498                ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_STREAM);
499    } else if(!strncmp(name, "localfilesystem:", 16)) {
500        return socket_local_server(name + 16,
501                ANDROID_SOCKET_NAMESPACE_FILESYSTEM, SOCK_STREAM);
502    }
503
504#endif
505    printf("unknown local portname '%s'\n", name);
506    return -1;
507}
508
509static int remove_listener(const char *local_name, const char *connect_to, atransport* transport)
510{
511    alistener *l;
512
513    for (l = listener_list.next; l != &listener_list; l = l->next) {
514        if (!strcmp(local_name, l->local_name) &&
515            !strcmp(connect_to, l->connect_to) &&
516            l->transport && l->transport == transport) {
517
518            listener_disconnect(l, transport);
519            return 0;
520        }
521    }
522
523    return -1;
524}
525
526static int install_listener(const char *local_name, const char *connect_to, atransport* transport)
527{
528    alistener *l;
529
530    //printf("install_listener('%s','%s')\n", local_name, connect_to);
531
532    for(l = listener_list.next; l != &listener_list; l = l->next){
533        if(strcmp(local_name, l->local_name) == 0) {
534            char *cto;
535
536                /* can't repurpose a smartsocket */
537            if(l->connect_to[0] == '*') {
538                return -1;
539            }
540
541            cto = strdup(connect_to);
542            if(cto == 0) {
543                return -1;
544            }
545
546            //printf("rebinding '%s' to '%s'\n", local_name, connect_to);
547            free((void*) l->connect_to);
548            l->connect_to = cto;
549            if (l->transport != transport) {
550                remove_transport_disconnect(l->transport, &l->disconnect);
551                l->transport = transport;
552                add_transport_disconnect(l->transport, &l->disconnect);
553            }
554            return 0;
555        }
556    }
557
558    if((l = calloc(1, sizeof(alistener))) == 0) goto nomem;
559    if((l->local_name = strdup(local_name)) == 0) goto nomem;
560    if((l->connect_to = strdup(connect_to)) == 0) goto nomem;
561
562
563    l->fd = local_name_to_fd(local_name);
564    if(l->fd < 0) {
565        free((void*) l->local_name);
566        free((void*) l->connect_to);
567        free(l);
568        printf("cannot bind '%s'\n", local_name);
569        return -2;
570    }
571
572    close_on_exec(l->fd);
573    if(!strcmp(l->connect_to, "*smartsocket*")) {
574        fdevent_install(&l->fde, l->fd, ss_listener_event_func, l);
575    } else {
576        fdevent_install(&l->fde, l->fd, listener_event_func, l);
577    }
578    fdevent_set(&l->fde, FDE_READ);
579
580    l->next = &listener_list;
581    l->prev = listener_list.prev;
582    l->next->prev = l;
583    l->prev->next = l;
584    l->transport = transport;
585
586    if (transport) {
587        l->disconnect.opaque = l;
588        l->disconnect.func   = listener_disconnect;
589        add_transport_disconnect(transport, &l->disconnect);
590    }
591    return 0;
592
593nomem:
594    fatal("cannot allocate listener");
595    return 0;
596}
597
598#ifdef HAVE_WIN32_PROC
599static BOOL WINAPI ctrlc_handler(DWORD type)
600{
601    exit(STATUS_CONTROL_C_EXIT);
602    return TRUE;
603}
604#endif
605
606static void adb_cleanup(void)
607{
608    usb_cleanup();
609}
610
611void start_logging(void)
612{
613#ifdef HAVE_WIN32_PROC
614    char    temp[ MAX_PATH ];
615    FILE*   fnul;
616    FILE*   flog;
617
618    GetTempPath( sizeof(temp) - 8, temp );
619    strcat( temp, "adb.log" );
620
621    /* Win32 specific redirections */
622    fnul = fopen( "NUL", "rt" );
623    if (fnul != NULL)
624        stdin[0] = fnul[0];
625
626    flog = fopen( temp, "at" );
627    if (flog == NULL)
628        flog = fnul;
629
630    setvbuf( flog, NULL, _IONBF, 0 );
631
632    stdout[0] = flog[0];
633    stderr[0] = flog[0];
634    fprintf(stderr,"--- adb starting (pid %d) ---\n", getpid());
635#else
636    int fd;
637
638    fd = unix_open("/dev/null", O_RDONLY);
639    dup2(fd, 0);
640    adb_close(fd);
641
642    fd = unix_open("/tmp/adb.log", O_WRONLY | O_CREAT | O_APPEND, 0640);
643    if(fd < 0) {
644        fd = unix_open("/dev/null", O_WRONLY);
645    }
646    dup2(fd, 1);
647    dup2(fd, 2);
648    adb_close(fd);
649    fprintf(stderr,"--- adb starting (pid %d) ---\n", getpid());
650#endif
651}
652
653#if !ADB_HOST
654void start_device_log(void)
655{
656    int fd;
657    char    path[PATH_MAX];
658    struct tm now;
659    time_t t;
660    char value[PROPERTY_VALUE_MAX];
661
662    // read the trace mask from persistent property persist.adb.trace_mask
663    // give up if the property is not set or cannot be parsed
664    property_get("persist.adb.trace_mask", value, "");
665    if (sscanf(value, "%x", &adb_trace_mask) != 1)
666        return;
667
668    adb_mkdir("/data/adb", 0775);
669    tzset();
670    time(&t);
671    localtime_r(&t, &now);
672    strftime(path, sizeof(path),
673                "/data/adb/adb-%Y-%m-%d-%H-%M-%S.txt",
674                &now);
675    fd = unix_open(path, O_WRONLY | O_CREAT | O_TRUNC, 0640);
676    if (fd < 0)
677        return;
678
679    // redirect stdout and stderr to the log file
680    dup2(fd, 1);
681    dup2(fd, 2);
682    fprintf(stderr,"--- adb starting (pid %d) ---\n", getpid());
683    adb_close(fd);
684
685    fd = unix_open("/dev/null", O_RDONLY);
686    dup2(fd, 0);
687    adb_close(fd);
688}
689#endif
690
691#if ADB_HOST
692int launch_server(int server_port)
693{
694#ifdef HAVE_WIN32_PROC
695    /* we need to start the server in the background                    */
696    /* we create a PIPE that will be used to wait for the server's "OK" */
697    /* message since the pipe handles must be inheritable, we use a     */
698    /* security attribute                                               */
699    HANDLE                pipe_read, pipe_write;
700    SECURITY_ATTRIBUTES   sa;
701    STARTUPINFO           startup;
702    PROCESS_INFORMATION   pinfo;
703    char                  program_path[ MAX_PATH ];
704    int                   ret;
705
706    sa.nLength = sizeof(sa);
707    sa.lpSecurityDescriptor = NULL;
708    sa.bInheritHandle = TRUE;
709
710    /* create pipe, and ensure its read handle isn't inheritable */
711    ret = CreatePipe( &pipe_read, &pipe_write, &sa, 0 );
712    if (!ret) {
713        fprintf(stderr, "CreatePipe() failure, error %ld\n", GetLastError() );
714        return -1;
715    }
716
717    SetHandleInformation( pipe_read, HANDLE_FLAG_INHERIT, 0 );
718
719    ZeroMemory( &startup, sizeof(startup) );
720    startup.cb = sizeof(startup);
721    startup.hStdInput  = GetStdHandle( STD_INPUT_HANDLE );
722    startup.hStdOutput = pipe_write;
723    startup.hStdError  = GetStdHandle( STD_ERROR_HANDLE );
724    startup.dwFlags    = STARTF_USESTDHANDLES;
725
726    ZeroMemory( &pinfo, sizeof(pinfo) );
727
728    /* get path of current program */
729    GetModuleFileName( NULL, program_path, sizeof(program_path) );
730
731    ret = CreateProcess(
732            program_path,                              /* program path  */
733            "adb fork-server server",
734                                    /* the fork-server argument will set the
735                                       debug = 2 in the child           */
736            NULL,                   /* process handle is not inheritable */
737            NULL,                    /* thread handle is not inheritable */
738            TRUE,                          /* yes, inherit some handles */
739            DETACHED_PROCESS, /* the new process doesn't have a console */
740            NULL,                     /* use parent's environment block */
741            NULL,                    /* use parent's starting directory */
742            &startup,                 /* startup info, i.e. std handles */
743            &pinfo );
744
745    CloseHandle( pipe_write );
746
747    if (!ret) {
748        fprintf(stderr, "CreateProcess failure, error %ld\n", GetLastError() );
749        CloseHandle( pipe_read );
750        return -1;
751    }
752
753    CloseHandle( pinfo.hProcess );
754    CloseHandle( pinfo.hThread );
755
756    /* wait for the "OK\n" message */
757    {
758        char  temp[3];
759        DWORD  count;
760
761        ret = ReadFile( pipe_read, temp, 3, &count, NULL );
762        CloseHandle( pipe_read );
763        if ( !ret ) {
764            fprintf(stderr, "could not read ok from ADB Server, error = %ld\n", GetLastError() );
765            return -1;
766        }
767        if (count != 3 || temp[0] != 'O' || temp[1] != 'K' || temp[2] != '\n') {
768            fprintf(stderr, "ADB server didn't ACK\n" );
769            return -1;
770        }
771    }
772#elif defined(HAVE_FORKEXEC)
773    char    path[PATH_MAX];
774    int     fd[2];
775
776    // set up a pipe so the child can tell us when it is ready.
777    // fd[0] will be parent's end, and fd[1] will get mapped to stderr in the child.
778    if (pipe(fd)) {
779        fprintf(stderr, "pipe failed in launch_server, errno: %d\n", errno);
780        return -1;
781    }
782    get_my_path(path, PATH_MAX);
783    pid_t pid = fork();
784    if(pid < 0) return -1;
785
786    if (pid == 0) {
787        // child side of the fork
788
789        // redirect stderr to the pipe
790        // we use stderr instead of stdout due to stdout's buffering behavior.
791        adb_close(fd[0]);
792        dup2(fd[1], STDERR_FILENO);
793        adb_close(fd[1]);
794
795        // child process
796        int result = execl(path, "adb", "fork-server", "server", NULL);
797        // this should not return
798        fprintf(stderr, "OOPS! execl returned %d, errno: %d\n", result, errno);
799    } else  {
800        // parent side of the fork
801
802        char  temp[3];
803
804        temp[0] = 'A'; temp[1] = 'B'; temp[2] = 'C';
805        // wait for the "OK\n" message
806        adb_close(fd[1]);
807        int ret = adb_read(fd[0], temp, 3);
808        int saved_errno = errno;
809        adb_close(fd[0]);
810        if (ret < 0) {
811            fprintf(stderr, "could not read ok from ADB Server, errno = %d\n", saved_errno);
812            return -1;
813        }
814        if (ret != 3 || temp[0] != 'O' || temp[1] != 'K' || temp[2] != '\n') {
815            fprintf(stderr, "ADB server didn't ACK\n" );
816            return -1;
817        }
818
819        setsid();
820    }
821#else
822#error "cannot implement background server start on this platform"
823#endif
824    return 0;
825}
826#endif
827
828/* Constructs a local name of form tcp:port.
829 * target_str points to the target string, it's content will be overwritten.
830 * target_size is the capacity of the target string.
831 * server_port is the port number to use for the local name.
832 */
833void build_local_name(char* target_str, size_t target_size, int server_port)
834{
835  snprintf(target_str, target_size, "tcp:%d", server_port);
836}
837
838int adb_main(int is_daemon, int server_port)
839{
840#if !ADB_HOST
841    int secure = 0;
842    int port;
843    char value[PROPERTY_VALUE_MAX];
844#endif
845
846    atexit(adb_cleanup);
847#ifdef HAVE_WIN32_PROC
848    SetConsoleCtrlHandler( ctrlc_handler, TRUE );
849#elif defined(HAVE_FORKEXEC)
850    // No SIGCHLD. Let the service subproc handle its children.
851    signal(SIGPIPE, SIG_IGN);
852#endif
853
854    init_transport_registration();
855
856
857#if ADB_HOST
858    HOST = 1;
859    usb_vendors_init();
860    usb_init();
861    local_init(DEFAULT_ADB_LOCAL_TRANSPORT_PORT);
862
863    char local_name[30];
864    build_local_name(local_name, sizeof(local_name), server_port);
865    if(install_listener(local_name, "*smartsocket*", NULL)) {
866        exit(1);
867    }
868#else
869    /* run adbd in secure mode if ro.secure is set and
870    ** we are not in the emulator
871    */
872    property_get("ro.kernel.qemu", value, "");
873    if (strcmp(value, "1") != 0) {
874        property_get("ro.secure", value, "1");
875        if (strcmp(value, "1") == 0) {
876            // don't run as root if ro.secure is set...
877            secure = 1;
878
879            // ... except we allow running as root in userdebug builds if the
880            // service.adb.root property has been set by the "adb root" command
881            property_get("ro.debuggable", value, "");
882            if (strcmp(value, "1") == 0) {
883                property_get("service.adb.root", value, "");
884                if (strcmp(value, "1") == 0) {
885                    secure = 0;
886                }
887            }
888        }
889    }
890
891    /* don't listen on a port (default 5037) if running in secure mode */
892    /* don't run as root if we are running in secure mode */
893    if (secure) {
894        struct __user_cap_header_struct header;
895        struct __user_cap_data_struct cap;
896
897        if (prctl(PR_SET_KEEPCAPS, 1, 0, 0, 0) != 0) {
898            exit(1);
899        }
900
901        /* add extra groups:
902        ** AID_ADB to access the USB driver
903        ** AID_LOG to read system logs (adb logcat)
904        ** AID_INPUT to diagnose input issues (getevent)
905        ** AID_INET to diagnose network issues (netcfg, ping)
906        ** AID_GRAPHICS to access the frame buffer
907        ** AID_NET_BT and AID_NET_BT_ADMIN to diagnose bluetooth (hcidump)
908        ** AID_SDCARD_RW to allow writing to the SD card
909        ** AID_MOUNT to allow unmounting the SD card before rebooting
910        */
911        gid_t groups[] = { AID_ADB, AID_LOG, AID_INPUT, AID_INET, AID_GRAPHICS,
912                           AID_NET_BT, AID_NET_BT_ADMIN, AID_SDCARD_RW, AID_MOUNT };
913        if (setgroups(sizeof(groups)/sizeof(groups[0]), groups) != 0) {
914            exit(1);
915        }
916
917        /* then switch user and group to "shell" */
918        if (setgid(AID_SHELL) != 0) {
919            exit(1);
920        }
921        if (setuid(AID_SHELL) != 0) {
922            exit(1);
923        }
924
925        /* set CAP_SYS_BOOT capability, so "adb reboot" will succeed */
926        header.version = _LINUX_CAPABILITY_VERSION;
927        header.pid = 0;
928        cap.effective = cap.permitted = (1 << CAP_SYS_BOOT);
929        cap.inheritable = 0;
930        capset(&header, &cap);
931
932        D("Local port disabled\n");
933    } else {
934        char local_name[30];
935        build_local_name(local_name, sizeof(local_name), server_port);
936        if(install_listener(local_name, "*smartsocket*", NULL)) {
937            exit(1);
938        }
939    }
940
941        /* for the device, start the usb transport if the
942        ** android usb device exists and the "service.adb.tcp.port" and
943        ** "persist.adb.tcp.port" properties are not set.
944        ** Otherwise start the network transport.
945        */
946    property_get("service.adb.tcp.port", value, "");
947    if (!value[0])
948        property_get("persist.adb.tcp.port", value, "");
949    if (sscanf(value, "%d", &port) == 1 && port > 0) {
950        // listen on TCP port specified by service.adb.tcp.port property
951        local_init(port);
952    } else if (access("/dev/android_adb", F_OK) == 0) {
953        // listen on USB
954        usb_init();
955    } else {
956        // listen on default port
957        local_init(DEFAULT_ADB_LOCAL_TRANSPORT_PORT);
958    }
959    D("adb_main(): pre init_jdwp()\n");
960    init_jdwp();
961    D("adb_main(): post init_jdwp()\n");
962#endif
963
964    if (is_daemon)
965    {
966        // inform our parent that we are up and running.
967#ifdef HAVE_WIN32_PROC
968        DWORD  count;
969        WriteFile( GetStdHandle( STD_OUTPUT_HANDLE ), "OK\n", 3, &count, NULL );
970#elif defined(HAVE_FORKEXEC)
971        fprintf(stderr, "OK\n");
972#endif
973        start_logging();
974    }
975    D("Event loop starting\n");
976
977    fdevent_loop();
978
979    usb_cleanup();
980
981    return 0;
982}
983
984#if ADB_HOST
985void connect_device(char* host, char* buffer, int buffer_size)
986{
987    int port, fd;
988    char* portstr = strchr(host, ':');
989    char hostbuf[100];
990    char serial[100];
991
992    strncpy(hostbuf, host, sizeof(hostbuf) - 1);
993    if (portstr) {
994        if (portstr - host >= sizeof(hostbuf)) {
995            snprintf(buffer, buffer_size, "bad host name %s", host);
996            return;
997        }
998        // zero terminate the host at the point we found the colon
999        hostbuf[portstr - host] = 0;
1000        if (sscanf(portstr + 1, "%d", &port) == 0) {
1001            snprintf(buffer, buffer_size, "bad port number %s", portstr);
1002            return;
1003        }
1004    } else {
1005        port = DEFAULT_ADB_LOCAL_TRANSPORT_PORT;
1006    }
1007
1008    snprintf(serial, sizeof(serial), "%s:%d", hostbuf, port);
1009    if (find_transport(serial)) {
1010        snprintf(buffer, buffer_size, "already connected to %s", serial);
1011        return;
1012    }
1013
1014    fd = socket_network_client(hostbuf, port, SOCK_STREAM);
1015    if (fd < 0) {
1016        snprintf(buffer, buffer_size, "unable to connect to %s:%d", host, port);
1017        return;
1018    }
1019
1020    D("client: connected on remote on fd %d\n", fd);
1021    close_on_exec(fd);
1022    disable_tcp_nagle(fd);
1023    register_socket_transport(fd, serial, port, 0);
1024    snprintf(buffer, buffer_size, "connected to %s", serial);
1025}
1026
1027void connect_emulator(char* port_spec, char* buffer, int buffer_size)
1028{
1029    char* port_separator = strchr(port_spec, ',');
1030    if (!port_separator) {
1031        snprintf(buffer, buffer_size,
1032                "unable to parse '%s' as <console port>,<adb port>",
1033                port_spec);
1034        return;
1035    }
1036
1037    // Zero-terminate console port and make port_separator point to 2nd port.
1038    *port_separator++ = 0;
1039    int console_port = strtol(port_spec, NULL, 0);
1040    int adb_port = strtol(port_separator, NULL, 0);
1041    if (!(console_port > 0 && adb_port > 0)) {
1042        *(port_separator - 1) = ',';
1043        snprintf(buffer, buffer_size,
1044                "Invalid port numbers: Expected positive numbers, got '%s'",
1045                port_spec);
1046        return;
1047    }
1048
1049    /* Check if the emulator is already known.
1050     * Note: There's a small but harmless race condition here: An emulator not
1051     * present just yet could be registered by another invocation right
1052     * after doing this check here. However, local_connect protects
1053     * against double-registration too. From here, a better error message
1054     * can be produced. In the case of the race condition, the very specific
1055     * error message won't be shown, but the data doesn't get corrupted. */
1056    atransport* known_emulator = find_emulator_transport_by_adb_port(adb_port);
1057    if (known_emulator != NULL) {
1058        snprintf(buffer, buffer_size,
1059                "Emulator on port %d already registered.", adb_port);
1060        return;
1061    }
1062
1063    /* Check if more emulators can be registered. Similar unproblematic
1064     * race condition as above. */
1065    int candidate_slot = get_available_local_transport_index();
1066    if (candidate_slot < 0) {
1067        snprintf(buffer, buffer_size, "Cannot accept more emulators.");
1068        return;
1069    }
1070
1071    /* Preconditions met, try to connect to the emulator. */
1072    if (!local_connect_arbitrary_ports(console_port, adb_port)) {
1073        snprintf(buffer, buffer_size,
1074                "Connected to emulator on ports %d,%d", console_port, adb_port);
1075    } else {
1076        snprintf(buffer, buffer_size,
1077                "Could not connect to emulator on ports %d,%d",
1078                console_port, adb_port);
1079    }
1080}
1081#endif
1082
1083int handle_host_request(char *service, transport_type ttype, char* serial, int reply_fd, asocket *s)
1084{
1085    atransport *transport = NULL;
1086    char buf[4096];
1087
1088    if(!strcmp(service, "kill")) {
1089        fprintf(stderr,"adb server killed by remote request\n");
1090        fflush(stdout);
1091        adb_write(reply_fd, "OKAY", 4);
1092        usb_cleanup();
1093        exit(0);
1094    }
1095
1096#if ADB_HOST
1097    // "transport:" is used for switching transport with a specified serial number
1098    // "transport-usb:" is used for switching transport to the only USB transport
1099    // "transport-local:" is used for switching transport to the only local transport
1100    // "transport-any:" is used for switching transport to the only transport
1101    if (!strncmp(service, "transport", strlen("transport"))) {
1102        char* error_string = "unknown failure";
1103        transport_type type = kTransportAny;
1104
1105        if (!strncmp(service, "transport-usb", strlen("transport-usb"))) {
1106            type = kTransportUsb;
1107        } else if (!strncmp(service, "transport-local", strlen("transport-local"))) {
1108            type = kTransportLocal;
1109        } else if (!strncmp(service, "transport-any", strlen("transport-any"))) {
1110            type = kTransportAny;
1111        } else if (!strncmp(service, "transport:", strlen("transport:"))) {
1112            service += strlen("transport:");
1113            serial = strdup(service);
1114        }
1115
1116        transport = acquire_one_transport(CS_ANY, type, serial, &error_string);
1117
1118        if (transport) {
1119            s->transport = transport;
1120            adb_write(reply_fd, "OKAY", 4);
1121        } else {
1122            sendfailmsg(reply_fd, error_string);
1123        }
1124        return 1;
1125    }
1126
1127    // return a list of all connected devices
1128    if (!strcmp(service, "devices")) {
1129        char buffer[4096];
1130        memset(buf, 0, sizeof(buf));
1131        memset(buffer, 0, sizeof(buffer));
1132        D("Getting device list \n");
1133        list_transports(buffer, sizeof(buffer));
1134        snprintf(buf, sizeof(buf), "OKAY%04x%s",(unsigned)strlen(buffer),buffer);
1135        D("Wrote device list \n");
1136        writex(reply_fd, buf, strlen(buf));
1137        return 0;
1138    }
1139
1140    // add a new TCP transport, device or emulator
1141    if (!strncmp(service, "connect:", 8)) {
1142        char buffer[4096];
1143        char* host = service + 8;
1144        if (!strncmp(host, "emu:", 4)) {
1145            connect_emulator(host + 4, buffer, sizeof(buffer));
1146        } else {
1147            connect_device(host, buffer, sizeof(buffer));
1148        }
1149        // Send response for emulator and device
1150        snprintf(buf, sizeof(buf), "OKAY%04x%s",(unsigned)strlen(buffer), buffer);
1151        writex(reply_fd, buf, strlen(buf));
1152        return 0;
1153    }
1154
1155    // remove TCP transport
1156    if (!strncmp(service, "disconnect:", 11)) {
1157        char buffer[4096];
1158        memset(buffer, 0, sizeof(buffer));
1159        char* serial = service + 11;
1160        if (serial[0] == 0) {
1161            // disconnect from all TCP devices
1162            unregister_all_tcp_transports();
1163        } else {
1164            char hostbuf[100];
1165            // assume port 5555 if no port is specified
1166            if (!strchr(serial, ':')) {
1167                snprintf(hostbuf, sizeof(hostbuf) - 1, "%s:5555", serial);
1168                serial = hostbuf;
1169            }
1170            atransport *t = find_transport(serial);
1171
1172            if (t) {
1173                unregister_transport(t);
1174            } else {
1175                snprintf(buffer, sizeof(buffer), "No such device %s", serial);
1176            }
1177        }
1178
1179        snprintf(buf, sizeof(buf), "OKAY%04x%s",(unsigned)strlen(buffer), buffer);
1180        writex(reply_fd, buf, strlen(buf));
1181        return 0;
1182    }
1183
1184    // returns our value for ADB_SERVER_VERSION
1185    if (!strcmp(service, "version")) {
1186        char version[12];
1187        snprintf(version, sizeof version, "%04x", ADB_SERVER_VERSION);
1188        snprintf(buf, sizeof buf, "OKAY%04x%s", (unsigned)strlen(version), version);
1189        writex(reply_fd, buf, strlen(buf));
1190        return 0;
1191    }
1192
1193    if(!strncmp(service,"get-serialno",strlen("get-serialno"))) {
1194        char *out = "unknown";
1195         transport = acquire_one_transport(CS_ANY, ttype, serial, NULL);
1196       if (transport && transport->serial) {
1197            out = transport->serial;
1198        }
1199        snprintf(buf, sizeof buf, "OKAY%04x%s",(unsigned)strlen(out),out);
1200        writex(reply_fd, buf, strlen(buf));
1201        return 0;
1202    }
1203    // indicates a new emulator instance has started
1204    if (!strncmp(service,"emulator:",9)) {
1205        int  port = atoi(service+9);
1206        local_connect(port);
1207        /* we don't even need to send a reply */
1208        return 0;
1209    }
1210#endif // ADB_HOST
1211
1212    if(!strncmp(service,"forward:",8) || !strncmp(service,"killforward:",12)) {
1213        char *local, *remote, *err;
1214        int r;
1215        atransport *transport;
1216
1217        int createForward = strncmp(service,"kill",4);
1218
1219        local = service + (createForward ? 8 : 12);
1220        remote = strchr(local,';');
1221        if(remote == 0) {
1222            sendfailmsg(reply_fd, "malformed forward spec");
1223            return 0;
1224        }
1225
1226        *remote++ = 0;
1227        if((local[0] == 0) || (remote[0] == 0) || (remote[0] == '*')){
1228            sendfailmsg(reply_fd, "malformed forward spec");
1229            return 0;
1230        }
1231
1232        transport = acquire_one_transport(CS_ANY, ttype, serial, &err);
1233        if (!transport) {
1234            sendfailmsg(reply_fd, err);
1235            return 0;
1236        }
1237
1238        if (createForward) {
1239            r = install_listener(local, remote, transport);
1240        } else {
1241            r = remove_listener(local, remote, transport);
1242        }
1243        if(r == 0) {
1244                /* 1st OKAY is connect, 2nd OKAY is status */
1245            writex(reply_fd, "OKAYOKAY", 8);
1246            return 0;
1247        }
1248
1249        if (createForward) {
1250            sendfailmsg(reply_fd, (r == -1) ? "cannot rebind smartsocket" : "cannot bind socket");
1251        } else {
1252            sendfailmsg(reply_fd, "cannot remove listener");
1253        }
1254        return 0;
1255    }
1256
1257    if(!strncmp(service,"get-state",strlen("get-state"))) {
1258        transport = acquire_one_transport(CS_ANY, ttype, serial, NULL);
1259        char *state = connection_state_name(transport);
1260        snprintf(buf, sizeof buf, "OKAY%04x%s",(unsigned)strlen(state),state);
1261        writex(reply_fd, buf, strlen(buf));
1262        return 0;
1263    }
1264    return -1;
1265}
1266
1267#if !ADB_HOST
1268int recovery_mode = 0;
1269#endif
1270
1271int main(int argc, char **argv)
1272{
1273#if ADB_HOST
1274    adb_sysdeps_init();
1275    adb_trace_init();
1276    D("Handling commandline()\n");
1277    return adb_commandline(argc - 1, argv + 1);
1278#else
1279    if((argc > 1) && (!strcmp(argv[1],"recovery"))) {
1280        adb_device_banner = "recovery";
1281        recovery_mode = 1;
1282    }
1283
1284    start_device_log();
1285    D("Handling main()\n");
1286    return adb_main(0, DEFAULT_ADB_PORT);
1287#endif
1288}
1289