/*
* Copyright (C) 2015 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 ADB
#include "sysdeps.h"
#include "adb_client.h"
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <string>
#include <thread>
#include <vector>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include <cutils/sockets.h>
#include "adb_io.h"
#include "adb_utils.h"
#include "socket_spec.h"
#include "sysdeps/chrono.h"
static TransportType __adb_transport = kTransportAny;
static const char* __adb_serial = NULL;
static const char* __adb_server_socket_spec;
void adb_set_transport(TransportType type, const char* serial) {
__adb_transport = type;
__adb_serial = serial;
}
void adb_set_socket_spec(const char* socket_spec) {
if (__adb_server_socket_spec) {
LOG(FATAL) << "attempted to reinitialize adb_server_socket_spec " << socket_spec << " (was " << __adb_server_socket_spec << ")";
}
__adb_server_socket_spec = socket_spec;
}
static int switch_socket_transport(int fd, std::string* error) {
std::string service;
if (__adb_serial) {
service += "host:transport:";
service += __adb_serial;
} else {
const char* transport_type = "???";
switch (__adb_transport) {
case kTransportUsb:
transport_type = "transport-usb";
break;
case kTransportLocal:
transport_type = "transport-local";
break;
case kTransportAny:
transport_type = "transport-any";
break;
case kTransportHost:
// no switch necessary
return 0;
}
service += "host:";
service += transport_type;
}
if (!SendProtocolString(fd, service)) {
*error = perror_str("write failure during connection");
adb_close(fd);
return -1;
}
D("Switch transport in progress");
if (!adb_status(fd, error)) {
adb_close(fd);
D("Switch transport failed: %s", error->c_str());
return -1;
}
D("Switch transport success");
return 0;
}
bool adb_status(int fd, std::string* error) {
char buf[5];
if (!ReadFdExactly(fd, buf, 4)) {
*error = perror_str("protocol fault (couldn't read status)");
return false;
}
if (!memcmp(buf, "OKAY", 4)) {
return true;
}
if (memcmp(buf, "FAIL", 4)) {
*error = android::base::StringPrintf("protocol fault (status %02x %02x %02x %02x?!)",
buf[0], buf[1], buf[2], buf[3]);
return false;
}
ReadProtocolString(fd, error, error);
return false;
}
int _adb_connect(const std::string& service, std::string* error) {
D("_adb_connect: %s", service.c_str());
if (service.empty() || service.size() > MAX_PAYLOAD_V1) {
*error = android::base::StringPrintf("bad service name length (%zd)",
service.size());
return -1;
}
std::string reason;
int fd = socket_spec_connect(__adb_server_socket_spec, &reason);
if (fd < 0) {
*error = android::base::StringPrintf("cannot connect to daemon at %s: %s",
__adb_server_socket_spec, reason.c_str());
return -2;
}
if ((memcmp(&service[0],"host",4) != 0 || service == "host:reconnect") &&
switch_socket_transport(fd, error)) {
return -1;
}
if (!SendProtocolString(fd, service)) {
*error = perror_str("write failure during connection");
adb_close(fd);
return -1;
}
if (service != "reconnect") {
if (!adb_status(fd, error)) {
adb_close(fd);
return -1;
}
}
D("_adb_connect: return fd %d", fd);
return fd;
}
int adb_connect(const std::string& service, std::string* error) {
// first query the adb server's version
int fd = _adb_connect("host:version", error);
D("adb_connect: service %s", service.c_str());
if (fd == -2 && !is_local_socket_spec(__adb_server_socket_spec)) {
fprintf(stderr,"** Cannot start server on remote host\n");
// error is the original network connection error
return fd;
} else if (fd == -2) {
fprintf(stdout, "* daemon not running. starting it now at %s *\n", __adb_server_socket_spec);
start_server:
if (launch_server(__adb_server_socket_spec)) {
fprintf(stderr,"* failed to start daemon *\n");
// launch_server() has already printed detailed error info, so just
// return a generic error string about the overall adb_connect()
// that the caller requested.
*error = "cannot connect to daemon";
return -1;
} else {
fprintf(stdout,"* daemon started successfully *\n");
}
// Give the server some time to start properly and detect devices.
std::this_thread::sleep_for(3s);
// fall through to _adb_connect
} else {
// If a server is already running, check its version matches.
int version = ADB_SERVER_VERSION - 1;
// If we have a file descriptor, then parse version result.
if (fd >= 0) {
std::string version_string;
if (!ReadProtocolString(fd, &version_string, error)) {
adb_close(fd);
return -1;
}
ReadOrderlyShutdown(fd);
adb_close(fd);
if (sscanf(&version_string[0], "%04x", &version) != 1) {
*error = android::base::StringPrintf("cannot parse version string: %s",
version_string.c_str());
return -1;
}
} else {
// If fd is -1 check for "unknown host service" which would
// indicate a version of adb that does not support the
// version command, in which case we should fall-through to kill it.
if (*error != "unknown host service") {
return fd;
}
}
if (version != ADB_SERVER_VERSION) {
printf("adb server version (%d) doesn't match this client (%d); killing...\n",
version, ADB_SERVER_VERSION);
fd = _adb_connect("host:kill", error);
if (fd >= 0) {
ReadOrderlyShutdown(fd);
adb_close(fd);
} else {
// If we couldn't connect to the server or had some other error,
// report it, but still try to start the server.
fprintf(stderr, "error: %s\n", error->c_str());
}
/* XXX can we better detect its death? */
std::this_thread::sleep_for(2s);
goto start_server;
}
}
// if the command is start-server, we are done.
if (service == "host:start-server") {
return 0;
}
fd = _adb_connect(service, error);
if (fd == -1) {
D("_adb_connect error: %s", error->c_str());
} else if(fd == -2) {
fprintf(stderr,"** daemon still not running\n");
}
D("adb_connect: return fd %d", fd);
return fd;
}
bool adb_command(const std::string& service) {
std::string error;
int fd = adb_connect(service, &error);
if (fd < 0) {
fprintf(stderr, "error: %s\n", error.c_str());
return false;
}
if (!adb_status(fd, &error)) {
fprintf(stderr, "error: %s\n", error.c_str());
adb_close(fd);
return false;
}
ReadOrderlyShutdown(fd);
adb_close(fd);
return true;
}
bool adb_query(const std::string& service, std::string* result, std::string* error) {
D("adb_query: %s", service.c_str());
int fd = adb_connect(service, error);
if (fd < 0) {
return false;
}
result->clear();
if (!ReadProtocolString(fd, result, error)) {
adb_close(fd);
return false;
}
ReadOrderlyShutdown(fd);
adb_close(fd);
return true;
}
std::string format_host_command(const char* command, TransportType type, const char* serial) {
if (serial) {
return android::base::StringPrintf("host-serial:%s:%s", serial, command);
}
const char* prefix = "host";
if (type == kTransportUsb) {
prefix = "host-usb";
} else if (type == kTransportLocal) {
prefix = "host-local";
}
return android::base::StringPrintf("%s:%s", prefix, command);
}
bool adb_get_feature_set(FeatureSet* feature_set, std::string* error) {
std::string result;
if (adb_query(format_host_command("features", __adb_transport, __adb_serial), &result, error)) {
*feature_set = StringToFeatureSet(result);
return true;
}
feature_set->clear();
return false;
}