25173c808a
Our servers can comfortably run more than 16 emulators, and this is much easier than messing with hypervisors or docker port allocation. Assumes you know how to avoid clashes with Google Wear's default port. Test: manual - still registers emulators. Change-Id: I47cfd28725a550de0bd77fd11fcd94cdd11d2cc2
399 lines
14 KiB
C++
399 lines
14 KiB
C++
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define TRACE_TAG TRANSPORT
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#include "sysdeps.h"
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#include "transport.h"
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <condition_variable>
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#include <functional>
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#include <memory>
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#include <mutex>
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#include <thread>
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#include <unordered_map>
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#include <vector>
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#include <android-base/parsenetaddress.h>
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#include <android-base/stringprintf.h>
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#include <android-base/thread_annotations.h>
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#include <cutils/sockets.h>
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#if !ADB_HOST
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#include <android-base/properties.h>
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#endif
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#include "adb.h"
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#include "adb_io.h"
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#include "adb_unique_fd.h"
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#include "adb_utils.h"
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#include "socket_spec.h"
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#include "sysdeps/chrono.h"
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#if ADB_HOST
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// Android Wear has been using port 5601 in all of its documentation/tooling,
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// but we search for emulators on ports [5554, 5555 + ADB_LOCAL_TRANSPORT_MAX].
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// Avoid stomping on their port by restricting the active scanning range.
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// Once emulators self-(re-)register, they'll have to avoid 5601 in their own way.
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static int adb_local_transport_max_port = DEFAULT_ADB_LOCAL_TRANSPORT_PORT + 16 * 2 - 1;
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static std::mutex& local_transports_lock = *new std::mutex();
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static void adb_local_transport_max_port_env_override() {
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const char* env_max_s = getenv("ADB_LOCAL_TRANSPORT_MAX_PORT");
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if (env_max_s != nullptr) {
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size_t env_max;
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if (ParseUint(&env_max, env_max_s, nullptr) && env_max < 65536) {
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// < DEFAULT_ADB_LOCAL_TRANSPORT_PORT harmlessly mimics ADB_EMU=0
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adb_local_transport_max_port = env_max;
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D("transport: ADB_LOCAL_TRANSPORT_MAX_PORT read as %d", adb_local_transport_max_port);
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} else {
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D("transport: ADB_LOCAL_TRANSPORT_MAX_PORT '%s' invalid or >= 65536, so ignored",
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env_max_s);
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}
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}
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}
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// We keep a map from emulator port to transport.
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// TODO: weak_ptr?
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static auto& local_transports GUARDED_BY(local_transports_lock) =
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*new std::unordered_map<int, atransport*>();
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#endif /* ADB_HOST */
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bool local_connect(int port) {
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std::string dummy;
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return local_connect_arbitrary_ports(port - 1, port, &dummy) == 0;
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}
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std::tuple<unique_fd, int, std::string> tcp_connect(const std::string& address,
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std::string* response) {
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unique_fd fd;
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int port = DEFAULT_ADB_LOCAL_TRANSPORT_PORT;
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std::string serial;
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std::string prefix_addr = address.starts_with("vsock:") ? address : "tcp:" + address;
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if (socket_spec_connect(&fd, prefix_addr, &port, &serial, response)) {
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close_on_exec(fd);
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if (!set_tcp_keepalive(fd, 1)) {
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D("warning: failed to configure TCP keepalives (%s)", strerror(errno));
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}
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return std::make_tuple(std::move(fd), port, serial);
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}
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return std::make_tuple(unique_fd(), 0, serial);
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}
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void connect_device(const std::string& address, std::string* response) {
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if (address.empty()) {
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*response = "empty address";
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return;
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}
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D("connection requested to '%s'", address.c_str());
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unique_fd fd;
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int port;
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std::string serial;
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std::tie(fd, port, serial) = tcp_connect(address, response);
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if (fd.get() == -1) {
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return;
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}
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auto reconnect = [address](atransport* t) {
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std::string response;
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unique_fd fd;
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int port;
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std::string serial;
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std::tie(fd, port, serial) = tcp_connect(address, &response);
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if (fd == -1) {
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D("reconnect failed: %s", response.c_str());
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return ReconnectResult::Retry;
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}
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// This invokes the part of register_socket_transport() that needs to be
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// invoked if the atransport* has already been setup. This eventually
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// calls atransport->SetConnection() with a newly created Connection*
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// that will in turn send the CNXN packet.
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return init_socket_transport(t, std::move(fd), port, 0) >= 0 ? ReconnectResult::Success
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: ReconnectResult::Retry;
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};
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int error;
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if (!register_socket_transport(std::move(fd), serial, port, 0, std::move(reconnect), &error)) {
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if (error == EALREADY) {
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*response = android::base::StringPrintf("already connected to %s", serial.c_str());
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} else if (error == EPERM) {
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*response = android::base::StringPrintf("failed to authenticate to %s", serial.c_str());
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} else {
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*response = android::base::StringPrintf("failed to connect to %s", serial.c_str());
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}
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} else {
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*response = android::base::StringPrintf("connected to %s", serial.c_str());
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}
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}
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int local_connect_arbitrary_ports(int console_port, int adb_port, std::string* error) {
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unique_fd fd;
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#if ADB_HOST
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if (find_emulator_transport_by_adb_port(adb_port) != nullptr ||
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find_emulator_transport_by_console_port(console_port) != nullptr) {
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return -1;
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}
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const char *host = getenv("ADBHOST");
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if (host) {
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fd.reset(network_connect(host, adb_port, SOCK_STREAM, 0, error));
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}
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#endif
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if (fd < 0) {
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fd.reset(network_loopback_client(adb_port, SOCK_STREAM, error));
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}
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if (fd >= 0) {
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D("client: connected on remote on fd %d", fd.get());
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close_on_exec(fd.get());
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disable_tcp_nagle(fd.get());
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std::string serial = getEmulatorSerialString(console_port);
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if (register_socket_transport(std::move(fd), std::move(serial), adb_port, 1,
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[](atransport*) { return ReconnectResult::Abort; })) {
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return 0;
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}
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}
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return -1;
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}
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#if ADB_HOST
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static void PollAllLocalPortsForEmulator() {
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// Try to connect to any number of running emulator instances.
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for (int port = DEFAULT_ADB_LOCAL_TRANSPORT_PORT; port <= adb_local_transport_max_port;
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port += 2) {
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local_connect(port); // Note, uses port and port-1, so '=max_port' is OK.
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}
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}
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// Retry the disconnected local port for 60 times, and sleep 1 second between two retries.
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static constexpr uint32_t LOCAL_PORT_RETRY_COUNT = 60;
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static constexpr auto LOCAL_PORT_RETRY_INTERVAL = 1s;
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struct RetryPort {
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int port;
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uint32_t retry_count;
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};
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// Retry emulators just kicked.
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static std::vector<RetryPort>& retry_ports = *new std::vector<RetryPort>;
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std::mutex &retry_ports_lock = *new std::mutex;
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std::condition_variable &retry_ports_cond = *new std::condition_variable;
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static void client_socket_thread(int) {
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adb_thread_setname("client_socket_thread");
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D("transport: client_socket_thread() starting");
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PollAllLocalPortsForEmulator();
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while (true) {
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std::vector<RetryPort> ports;
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// Collect retry ports.
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{
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std::unique_lock<std::mutex> lock(retry_ports_lock);
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while (retry_ports.empty()) {
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retry_ports_cond.wait(lock);
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}
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retry_ports.swap(ports);
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}
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// Sleep here instead of the end of loop, because if we immediately try to reconnect
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// the emulator just kicked, the adbd on the emulator may not have time to remove the
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// just kicked transport.
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std::this_thread::sleep_for(LOCAL_PORT_RETRY_INTERVAL);
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// Try connecting retry ports.
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std::vector<RetryPort> next_ports;
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for (auto& port : ports) {
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VLOG(TRANSPORT) << "retry port " << port.port << ", last retry_count "
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<< port.retry_count;
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if (local_connect(port.port)) {
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VLOG(TRANSPORT) << "retry port " << port.port << " successfully";
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continue;
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}
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if (--port.retry_count > 0) {
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next_ports.push_back(port);
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} else {
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VLOG(TRANSPORT) << "stop retrying port " << port.port;
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}
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}
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// Copy back left retry ports.
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{
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std::unique_lock<std::mutex> lock(retry_ports_lock);
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retry_ports.insert(retry_ports.end(), next_ports.begin(), next_ports.end());
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}
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}
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}
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#else // !ADB_HOST
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void server_socket_thread(std::function<unique_fd(int, std::string*)> listen_func, int port) {
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adb_thread_setname("server socket");
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unique_fd serverfd;
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std::string error;
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while (serverfd == -1) {
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errno = 0;
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serverfd = listen_func(port, &error);
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if (errno == EAFNOSUPPORT || errno == EINVAL || errno == EPROTONOSUPPORT) {
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D("unrecoverable error: '%s'", error.c_str());
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return;
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} else if (serverfd < 0) {
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D("server: cannot bind socket yet: %s", error.c_str());
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std::this_thread::sleep_for(1s);
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continue;
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}
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close_on_exec(serverfd.get());
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}
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while (true) {
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D("server: trying to get new connection from fd %d", serverfd.get());
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unique_fd fd(adb_socket_accept(serverfd, nullptr, nullptr));
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if (fd >= 0) {
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D("server: new connection on fd %d", fd.get());
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close_on_exec(fd.get());
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disable_tcp_nagle(fd.get());
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std::string serial = android::base::StringPrintf("host-%d", fd.get());
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register_socket_transport(std::move(fd), std::move(serial), port, 1,
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[](atransport*) { return ReconnectResult::Abort; });
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}
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}
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D("transport: server_socket_thread() exiting");
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}
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#endif
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unique_fd tcp_listen_inaddr_any(int port, std::string* error) {
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return unique_fd{network_inaddr_any_server(port, SOCK_STREAM, error)};
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}
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#if !ADB_HOST
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static unique_fd vsock_listen(int port, std::string* error) {
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return unique_fd{
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socket_spec_listen(android::base::StringPrintf("vsock:%d", port), error, nullptr)
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};
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}
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#endif
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void local_init(int port) {
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#if ADB_HOST
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D("transport: local client init");
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std::thread(client_socket_thread, port).detach();
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adb_local_transport_max_port_env_override();
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#elif !defined(__ANDROID__)
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// Host adbd.
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D("transport: local server init");
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std::thread(server_socket_thread, tcp_listen_inaddr_any, port).detach();
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std::thread(server_socket_thread, vsock_listen, port).detach();
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#else
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D("transport: local server init");
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// For the adbd daemon in the system image we need to distinguish
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// between the device, and the emulator.
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if (use_qemu_goldfish()) {
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std::thread(qemu_socket_thread, port).detach();
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} else {
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std::thread(server_socket_thread, tcp_listen_inaddr_any, port).detach();
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}
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std::thread(server_socket_thread, vsock_listen, port).detach();
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#endif // !ADB_HOST
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}
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#if ADB_HOST
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struct EmulatorConnection : public FdConnection {
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EmulatorConnection(unique_fd fd, int local_port)
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: FdConnection(std::move(fd)), local_port_(local_port) {}
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~EmulatorConnection() {
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VLOG(TRANSPORT) << "remote_close, local_port = " << local_port_;
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std::unique_lock<std::mutex> lock(retry_ports_lock);
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RetryPort port;
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port.port = local_port_;
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port.retry_count = LOCAL_PORT_RETRY_COUNT;
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retry_ports.push_back(port);
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retry_ports_cond.notify_one();
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}
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void Close() override {
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std::lock_guard<std::mutex> lock(local_transports_lock);
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local_transports.erase(local_port_);
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FdConnection::Close();
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}
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int local_port_;
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};
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/* Only call this function if you already hold local_transports_lock. */
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static atransport* find_emulator_transport_by_adb_port_locked(int adb_port)
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REQUIRES(local_transports_lock) {
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auto it = local_transports.find(adb_port);
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if (it == local_transports.end()) {
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return nullptr;
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}
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return it->second;
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}
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atransport* find_emulator_transport_by_adb_port(int adb_port) {
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std::lock_guard<std::mutex> lock(local_transports_lock);
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return find_emulator_transport_by_adb_port_locked(adb_port);
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}
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atransport* find_emulator_transport_by_console_port(int console_port) {
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return find_transport(getEmulatorSerialString(console_port).c_str());
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}
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#endif
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std::string getEmulatorSerialString(int console_port) {
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return android::base::StringPrintf("emulator-%d", console_port);
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}
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int init_socket_transport(atransport* t, unique_fd fd, int adb_port, int local) {
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int fail = 0;
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t->type = kTransportLocal;
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#if ADB_HOST
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// Emulator connection.
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if (local) {
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auto emulator_connection = std::make_unique<EmulatorConnection>(std::move(fd), adb_port);
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t->SetConnection(
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std::make_unique<BlockingConnectionAdapter>(std::move(emulator_connection)));
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std::lock_guard<std::mutex> lock(local_transports_lock);
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atransport* existing_transport = find_emulator_transport_by_adb_port_locked(adb_port);
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if (existing_transport != nullptr) {
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D("local transport for port %d already registered (%p)?", adb_port, existing_transport);
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fail = -1;
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} else {
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local_transports[adb_port] = t;
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}
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return fail;
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}
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#endif
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// Regular tcp connection.
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auto fd_connection = std::make_unique<FdConnection>(std::move(fd));
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t->SetConnection(std::make_unique<BlockingConnectionAdapter>(std::move(fd_connection)));
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return fail;
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}
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