adb.c

Android 一些工具

/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#define  TRACE_TAG   TRACE_ADB

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdarg.h>
#include <errno.h>
#include <string.h>
#include <time.h>

#include "sysdeps.h"
#include "adb.h"

#if !ADB_HOST
#include <private/android_filesystem_config.h>
#endif


int HOST = 0;

static const char *adb_device_banner = "device";

void fatal(const char *fmt, ...)
{
    va_list ap;
    va_start(ap, fmt);
    fprintf(stderr, "error: ");
    vfprintf(stderr, fmt, ap);
    fprintf(stderr, "\n");
    va_end(ap);
    exit(-1);
}

void fatal_errno(const char *fmt, ...)
{
    va_list ap;
    va_start(ap, fmt);
    fprintf(stderr, "error: %s: ", strerror(errno));
    vfprintf(stderr, fmt, ap);
    fprintf(stderr, "\n");
    va_end(ap);
    exit(-1);
}

int   adb_trace_mask;

/* read a comma/space/colum/semi-column separated list of tags
 * from the ADB_TRACE environment variable and build the trace
 * mask from it. note that '1' and 'all' are special cases to
 * enable all tracing
 */
void  adb_trace_init(void)
{
	const char*  p = getenv("ADB_TRACE");
	const char*  q;

	static const struct {
		const char*  tag;
		int           flag;
	} tags[] = {
	    { "1", 0 },
		{ "all", 0 },
		{ "adb", TRACE_ADB },
		{ "sockets", TRACE_SOCKETS },
		{ "packets", TRACE_PACKETS },
		{ "rwx", TRACE_RWX },
		{ "usb", TRACE_USB },
		{ "sync", TRACE_SYNC },
		{ "sysdeps", TRACE_SYSDEPS },
        { "transport", TRACE_TRANSPORT },
        { "jdwp", TRACE_JDWP },
		{ NULL, 0 }
	};

	if (p == NULL)
		return;

	/* use a comma/column/semi-colum/space separated list */
	while (*p) {
		int  len, tagn;

		q = strpbrk(p, " ,:;");
		if (q == NULL) {
			q = p + strlen(p);
		}
		len = q - p;

		for (tagn = 0; tags[tagn].tag != NULL; tagn++)
		{
			int  taglen = strlen(tags[tagn].tag);

			if (len == taglen && !memcmp(tags[tagn].tag, p, len) )
			{
				int  flag = tags[tagn].flag;
				if (flag == 0) {
					adb_trace_mask = ~0;
					return;
				}
				adb_trace_mask |= (1 << flag);
				break;
			}
		}
		p = q;
		if (*p)
			p++;
	}
}


apacket *get_apacket(void)
{
    apacket *p = malloc(sizeof(apacket));
    if(p == 0) fatal("failed to allocate an apacket");
    memset(p, 0, sizeof(apacket) - MAX_PAYLOAD);
    return p;
}

void put_apacket(apacket *p)
{
    free(p);
}

void handle_online(void)
{
    D("adb: online\n");
#if !ADB_HOST
    property_set("adb.connected","1");
#endif
}

void handle_offline(atransport *t)
{
    D("adb: offline\n");
    //Close the associated usb
    run_transport_disconnects(t);
#if !ADB_HOST
    property_set("adb.connected","");
#endif
}

#if TRACE_PACKETS
#define DUMPMAX 32
void print_packet(const char *label, apacket *p)
{
    char *tag;
    char *x;
    unsigned count;

    switch(p->msg.command){
    case A_SYNC: tag = "SYNC"; break;
    case A_CNXN: tag = "CNXN" ; break;
    case A_OPEN: tag = "OPEN"; break;
    case A_OKAY: tag = "OKAY"; break;
    case A_CLSE: tag = "CLSE"; break;
    case A_WRTE: tag = "WRTE"; break;
    default: tag = "????"; break;
    }

    fprintf(stderr, "%s: %s %08x %08x %04x \"",
            label, tag, p->msg.arg0, p->msg.arg1, p->msg.data_length);
    count = p->msg.data_length;
    x = (char*) p->data;
    if(count > DUMPMAX) {
        count = DUMPMAX;
        tag = "\n";
    } else {
        tag = "\"\n";
    }
    while(count-- > 0){
        if((*x >= ' ') && (*x < 127)) {
            fputc(*x, stderr);
        } else {
            fputc('.', stderr);
        }
        x++;
    }
    fprintf(stderr, tag);
}
#endif

static void send_ready(unsigned local, unsigned remote, atransport *t)
{
    D("Calling send_ready \n");
    apacket *p = get_apacket();
    p->msg.command = A_OKAY;
    p->msg.arg0 = local;
    p->msg.arg1 = remote;
    send_packet(p, t);
}

static void send_close(unsigned local, unsigned remote, atransport *t)
{
    D("Calling send_close \n");
    apacket *p = get_apacket();
    p->msg.command = A_CLSE;
    p->msg.arg0 = local;
    p->msg.arg1 = remote;
    send_packet(p, t);
}

static void send_connect(atransport *t)
{
    D("Calling send_connect \n");
    apacket *cp = get_apacket();
    cp->msg.command = A_CNXN;
    cp->msg.arg0 = A_VERSION;
    cp->msg.arg1 = MAX_PAYLOAD;
    snprintf((char*) cp->data, sizeof cp->data, "%s::",
            HOST ? "host" : adb_device_banner);
    cp->msg.data_length = strlen((char*) cp->data) + 1;
    send_packet(cp, t);
#if ADB_HOST
        /* XXX why sleep here? */
    // allow the device some time to respond to the connect message
    adb_sleep_ms(1000);
#endif
}

static char *connection_state_name(atransport *t)
{
    if (t == NULL) {
        return "unknown";
    }

    switch(t->connection_state) {
    case CS_BOOTLOADER:
        return "bootloader";
    case CS_DEVICE:
        return "device";
    case CS_OFFLINE:
        return "offline";
    default:
        return "unknown";
    }
}

void parse_banner(char *banner, atransport *t)
{
    char *type, *product, *end;

    D("parse_banner: %s\n", banner);
    type = banner;
    product = strchr(type, ':');
    if(product) {
        *product++ = 0;
    } else {
        product = "";
    }

        /* remove trailing ':' */
    end = strchr(product, ':');
    if(end) *end = 0;

        /* save product name in device structure */
    if (t->product == NULL) {
        t->product = strdup(product);
    } else if (strcmp(product, t->product) != 0) {
        free(t->product);
        t->product = strdup(product);
    }

    if(!strcmp(type, "bootloader")){
        D("setting connection_state to CS_BOOTLOADER\n");
        t->connection_state = CS_BOOTLOADER;
        update_transports();
        return;
    }

    if(!strcmp(type, "device")) {
        D("setting connection_state to CS_DEVICE\n");
        t->connection_state = CS_DEVICE;
        update_transports();
        return;
    }

    if(!strcmp(type, "recovery")) {
        D("setting connection_state to CS_RECOVERY\n");
        t->connection_state = CS_RECOVERY;
        update_transports();
        return;
    }

    t->connection_state = CS_HOST;
}

void handle_packet(apacket *p, atransport *t)
{
    asocket *s;

    D("handle_packet() %d\n", p->msg.command);

    print_packet("recv", p);

    switch(p->msg.command){
    case A_SYNC:
        if(p->msg.arg0){
            send_packet(p, t);
            if(HOST) send_connect(t);
        } else {
            t->connection_state = CS_OFFLINE;
            handle_offline(t);
            send_packet(p, t);
        }
        return;

    case A_CNXN: /* CONNECT(version, maxdata, "system-id-string") */
            /* XXX verify version, etc */
        if(t->connection_state != CS_OFFLINE) {
            t->connection_state = CS_OFFLINE;
            handle_offline(t);
        }
        parse_banner((char*) p->data, t);
        handle_online();
        if(!HOST) send_connect(t);
        break;

    case A_OPEN: /* OPEN(local-id, 0, "destination") */
        if(t->connection_state != CS_OFFLINE) {
            char *name = (char*) p->data;
            name[p->msg.data_length > 0 ? p->msg.data_length - 1 : 0] = 0;
            s = create_local_service_socket(name);
            if(s == 0) {
                send_close(0, p->msg.arg0, t);
            } else {
                s->peer = create_remote_socket(p->msg.arg0, t);
                s->peer->peer = s;
                send_ready(s->id, s->peer->id, t);
                s->ready(s);
            }
        }
        break;

    case A_OKAY: /* READY(local-id, remote-id, "") */
        if(t->connection_state != CS_OFFLINE) {
            if((s = find_local_socket(p->msg.arg1))) {
                if(s->peer == 0) {
                    s->peer = create_remote_socket(p->msg.arg0, t);
                    s->peer->peer = s;
                }
                s->ready(s);
            }
        }
        break;

    case A_CLSE: /* CLOSE(local-id, remote-id, "") */
        if(t->connection_state != CS_OFFLINE) {
            if((s = find_local_socket(p->msg.arg1))) {
                s->close(s);
            }
        }
        break;

    case A_WRTE:
        if(t->connection_state != CS_OFFLINE) {
            if((s = find_local_socket(p->msg.arg1))) {
                unsigned rid = p->msg.arg0;
                p->len = p->msg.data_length;

                if(s->enqueue(s, p) == 0) {
                    D("Enqueue the socket\n");
                    send_ready(s->id, rid, t);
                }
                return;
            }
        }
        break;

    default:
        printf("handle_packet: what is %08x?!\n", p->msg.command);
    }

    put_apacket(p);
}

alistener listener_list = {
    .next = &listener_list,
    .prev = &listener_list,
};

static void ss_listener_event_func(int _fd, unsigned ev, void *_l)
{
    asocket *s;

    if(ev & FDE_READ) {
        struct sockaddr addr;
        socklen_t alen;
        int fd;

        alen = sizeof(addr);
        fd = adb_socket_accept(_fd, &addr, &alen);
        if(fd < 0) return;

        adb_socket_setbufsize(fd, CHUNK_SIZE);

        s = create_local_socket(fd);
        if(s) {
            connect_to_smartsocket(s);
            return;
        }

        adb_close(fd);
    }
}

static void listener_event_func(int _fd, unsigned ev, void *_l)
{
    alistener *l = _l;
    asocket *s;

    if(ev & FDE_READ) {
        struct sockaddr addr;
        socklen_t alen;
        int fd;

        alen = sizeof(addr);
        fd = adb_socket_accept(_fd, &addr, &alen);
        if(fd < 0) return;

        s = create_local_socket(fd);
        if(s) {
            s->transport = l->transport;
            connect_to_remote(s, l->connect_to);
            return;
        }

        adb_close(fd);
    }
}

static void  free_listener(alistener*  l)
{
    if (l->next) {
        l->next->prev = l->prev;
        l->prev->next = l->next;
        l->next = l->prev = l;
    }

    // closes the corresponding fd
    fdevent_remove(&l->fde);

    if (l->local_name)
        free((char*)l->local_name);

    if (l->connect_to)
        free((char*)l->connect_to);

    if (l->transport) {
        remove_transport_disconnect(l->transport, &l->disconnect);
    }
    free(l);
}

static void listener_disconnect(void*  _l, atransport*  t)
{
    alistener*  l = _l;

    free_listener(l);
}

int local_name_to_fd(const char *name)
{
    int port;

    if(!strncmp("tcp:", name, 4)){
        int  ret;
        port = atoi(name + 4);
        ret = socket_loopback_server(port, SOCK_STREAM);
        return ret;
    }
#ifndef HAVE_WIN32_IPC  /* no Unix-domain sockets on Win32 */
    // It's non-sensical to support the "reserved" space on the adb host side
    if(!strncmp(name, "local:", 6)) {
        return socket_local_server(name + 6,
                ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_STREAM);
    } else if(!strncmp(name, "localabstract:", 14)) {
        return socket_local_server(name + 14,
                ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_STREAM);
    } else if(!strncmp(name, "localfilesystem:", 16)) {
        return socket_local_server(name + 16,
                ANDROID_SOCKET_NAMESPACE_FILESYSTEM, SOCK_STREAM);
    }

#endif
    printf("unknown local portname '%s'\n", name);
    return -1;
}

static int remove_listener(const char *local_name, const char *connect_to, atransport* transport)
{
    alistener *l;

    for (l = listener_list.next; l != &listener_list; l = l->next) {
        if (!strcmp(local_name, l->local_name) &&
            !strcmp(connect_to, l->connect_to) &&
            l->transport && l->transport == transport) {

            listener_disconnect(l, transport);
            return 0;
        }
    }

    return -1;
}

static int install_listener(const char *local_name, const char *connect_to, atransport* transport)
{
    alistener *l;

    //printf("install_listener('%s','%s')\n", local_name, connect_to);

    for(l = listener_list.next; l != &listener_list; l = l->next){
        if(strcmp(local_name, l->local_name) == 0) {
            char *cto;

                /* can't repurpose a smartsocket */
            if(l->connect_to[0] == '*') {
                return -1;
            }

            cto = strdup(connect_to);
            if(cto == 0) {
                return -1;
            }

            //printf("rebinding '%s' to '%s'\n", local_name, connect_to);
            free((void*) l->connect_to);
            l->connect_to = cto;
            if (l->transport != transport) {
                remove_transport_disconnect(l->transport, &l->disconnect);
                l->transport = transport;
                add_transport_disconnect(l->transport, &l->disconnect);