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/*
* 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 SERVICES
#include "sysdeps.h"
#include <errno.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <thread>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include <cutils/sockets.h>
#include "adb.h"
#include "adb_io.h"
#include "adb_unique_fd.h"
#include "adb_utils.h"
#include "services.h"
#include "socket_spec.h"
#include "sysdeps.h"
#include "transport.h"
namespace {
void service_bootstrap_func(std::string service_name, std::function<void(unique_fd)> func,
unique_fd fd) {
adb_thread_setname(android::base::StringPrintf("%s svc %d", service_name.c_str(), fd.get()));
func(std::move(fd));
}
} // namespace
unique_fd create_service_thread(const char* service_name, std::function<void(unique_fd)> func) {
int s[2];
if (adb_socketpair(s)) {
printf("cannot create service socket pair\n");
return unique_fd();
}
D("socketpair: (%d,%d)", s[0], s[1]);
#if !ADB_HOST
if (strcmp(service_name, "sync") == 0) {
// Set file sync service socket to maximum size
int max_buf = LINUX_MAX_SOCKET_SIZE;
adb_setsockopt(s[0], SOL_SOCKET, SO_SNDBUF, &max_buf, sizeof(max_buf));
adb_setsockopt(s[1], SOL_SOCKET, SO_SNDBUF, &max_buf, sizeof(max_buf));
}
#endif // !ADB_HOST
std::thread(service_bootstrap_func, service_name, func, unique_fd(s[1])).detach();
D("service thread started, %d:%d",s[0], s[1]);
return unique_fd(s[0]);
}
int service_to_fd(const char* name, atransport* transport) {
int ret = -1;
if (is_socket_spec(name)) {
std::string error;
ret = socket_spec_connect(name, &error);
if (ret < 0) {
LOG(ERROR) << "failed to connect to socket '" << name << "': " << error;
}
} else {
#if !ADB_HOST
ret = daemon_service_to_fd(name, transport).release();
#endif
}
if (ret >= 0) {
close_on_exec(ret);
}
return ret;
}
#if ADB_HOST
struct state_info {
TransportType transport_type;
std::string serial;
TransportId transport_id;
ConnectionState state;
};
static void wait_for_state(int fd, void* data) {
std::unique_ptr<state_info> sinfo(reinterpret_cast<state_info*>(data));
D("wait_for_state %d", sinfo->state);
while (true) {
bool is_ambiguous = false;
std::string error = "unknown error";
const char* serial = sinfo->serial.length() ? sinfo->serial.c_str() : nullptr;
atransport* t = acquire_one_transport(sinfo->transport_type, serial, sinfo->transport_id,
&is_ambiguous, &error);
if (t != nullptr && (sinfo->state == kCsAny || sinfo->state == t->GetConnectionState())) {
SendOkay(fd);
break;
} else if (!is_ambiguous) {
adb_pollfd pfd = {.fd = fd, .events = POLLIN };
int rc = adb_poll(&pfd, 1, 1000);
if (rc < 0) {
SendFail(fd, error);
break;
} else if (rc > 0 && (pfd.revents & POLLHUP) != 0) {
// The other end of the socket is closed, probably because the other side was
// terminated, bail out.
break;
}
// Try again...
} else {
SendFail(fd, error);
break;
}
}
adb_close(fd);
D("wait_for_state is done");
}
void connect_emulator(const std::string& port_spec, std::string* response) {
std::vector<std::string> pieces = android::base::Split(port_spec, ",");
if (pieces.size() != 2) {
*response = android::base::StringPrintf("unable to parse '%s' as <console port>,<adb port>",
port_spec.c_str());
return;
}
int console_port = strtol(pieces[0].c_str(), nullptr, 0);
int adb_port = strtol(pieces[1].c_str(), nullptr, 0);
if (console_port <= 0 || adb_port <= 0) {
*response = android::base::StringPrintf("Invalid port numbers: %s", port_spec.c_str());
return;
}
// Check if the emulator is already known.
// Note: There's a small but harmless race condition here: An emulator not
// present just yet could be registered by another invocation right
// after doing this check here. However, local_connect protects
// against double-registration too. From here, a better error message
// can be produced. In the case of the race condition, the very specific
// error message won't be shown, but the data doesn't get corrupted.
atransport* known_emulator = find_emulator_transport_by_adb_port(adb_port);
if (known_emulator != nullptr) {
*response = android::base::StringPrintf("Emulator already registered on port %d", adb_port);
return;
}
// Preconditions met, try to connect to the emulator.
std::string error;
if (!local_connect_arbitrary_ports(console_port, adb_port, &error)) {
*response = android::base::StringPrintf("Connected to emulator on ports %d,%d",
console_port, adb_port);
} else {
*response = android::base::StringPrintf("Could not connect to emulator on ports %d,%d: %s",
console_port, adb_port, error.c_str());
}
}
static void connect_service(unique_fd fd, std::string host) {
std::string response;
if (!strncmp(host.c_str(), "emu:", 4)) {
connect_emulator(host.c_str() + 4, &response);
} else {
connect_device(host.c_str(), &response);
}
// Send response for emulator and device
SendProtocolString(fd.get(), response);
}
#endif
#if ADB_HOST
asocket* host_service_to_socket(const char* name, const char* serial, TransportId transport_id) {
if (!strcmp(name,"track-devices")) {
return create_device_tracker(false);
} else if (!strcmp(name, "track-devices-l")) {
return create_device_tracker(true);
} else if (android::base::StartsWith(name, "wait-for-")) {
name += strlen("wait-for-");
std::unique_ptr<state_info> sinfo = std::make_unique<state_info>();
if (sinfo == nullptr) {
fprintf(stderr, "couldn't allocate state_info: %s", strerror(errno));
return nullptr;
}
if (serial) sinfo->serial = serial;
sinfo->transport_id = transport_id;
if (android::base::StartsWith(name, "local")) {
name += strlen("local");
sinfo->transport_type = kTransportLocal;
} else if (android::base::StartsWith(name, "usb")) {
name += strlen("usb");
sinfo->transport_type = kTransportUsb;
} else if (android::base::StartsWith(name, "any")) {
name += strlen("any");
sinfo->transport_type = kTransportAny;
} else {
return nullptr;
}
if (!strcmp(name, "-device")) {
sinfo->state = kCsDevice;
} else if (!strcmp(name, "-recovery")) {
sinfo->state = kCsRecovery;
} else if (!strcmp(name, "-sideload")) {
sinfo->state = kCsSideload;
} else if (!strcmp(name, "-bootloader")) {
sinfo->state = kCsBootloader;
} else if (!strcmp(name, "-any")) {
sinfo->state = kCsAny;
} else {
return nullptr;
}
int fd = create_service_thread(
"wait", std::bind(wait_for_state, std::placeholders::_1, sinfo.get()))
.release();
if (fd != -1) {
sinfo.release();
}
return create_local_socket(fd);
} else if (!strncmp(name, "connect:", 8)) {
std::string host(name + strlen("connect:"));
int fd = create_service_thread("connect",
std::bind(connect_service, std::placeholders::_1, host))
.release();
return create_local_socket(fd);
}
return nullptr;
}
#endif /* ADB_HOST */