254 lines
8.5 KiB
C++
254 lines
8.5 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 SERVICES
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#include "sysdeps.h"
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#include <errno.h>
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#include <stddef.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 <thread>
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#include <android-base/stringprintf.h>
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#include <android-base/strings.h>
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#include <cutils/sockets.h>
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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 "services.h"
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#include "socket_spec.h"
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#include "sysdeps.h"
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#include "transport.h"
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namespace {
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void service_bootstrap_func(std::string service_name, std::function<void(unique_fd)> func,
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unique_fd fd) {
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adb_thread_setname(android::base::StringPrintf("%s svc %d", service_name.c_str(), fd.get()));
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func(std::move(fd));
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}
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} // namespace
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unique_fd create_service_thread(const char* service_name, std::function<void(unique_fd)> func) {
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int s[2];
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if (adb_socketpair(s)) {
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printf("cannot create service socket pair\n");
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return unique_fd();
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}
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D("socketpair: (%d,%d)", s[0], s[1]);
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#if !ADB_HOST
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if (strcmp(service_name, "sync") == 0) {
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// Set file sync service socket to maximum size
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int max_buf = LINUX_MAX_SOCKET_SIZE;
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adb_setsockopt(s[0], SOL_SOCKET, SO_SNDBUF, &max_buf, sizeof(max_buf));
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adb_setsockopt(s[1], SOL_SOCKET, SO_SNDBUF, &max_buf, sizeof(max_buf));
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}
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#endif // !ADB_HOST
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std::thread(service_bootstrap_func, service_name, func, unique_fd(s[1])).detach();
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D("service thread started, %d:%d", s[0], s[1]);
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return unique_fd(s[0]);
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}
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unique_fd service_to_fd(std::string_view name, atransport* transport) {
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unique_fd ret;
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if (is_socket_spec(name)) {
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std::string error;
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if (!socket_spec_connect(&ret, name, nullptr, nullptr, &error)) {
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LOG(ERROR) << "failed to connect to socket '" << name << "': " << error;
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}
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} else {
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#if !ADB_HOST
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ret = daemon_service_to_fd(name, transport);
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#endif
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}
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if (ret >= 0) {
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close_on_exec(ret.get());
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}
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return ret;
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}
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#if ADB_HOST
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struct state_info {
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TransportType transport_type;
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std::string serial;
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TransportId transport_id;
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ConnectionState state;
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};
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static void wait_for_state(unique_fd fd, state_info* sinfo) {
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D("wait_for_state %d", sinfo->state);
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while (true) {
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bool is_ambiguous = false;
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std::string error = "unknown error";
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const char* serial = sinfo->serial.length() ? sinfo->serial.c_str() : nullptr;
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atransport* t = acquire_one_transport(sinfo->transport_type, serial, sinfo->transport_id,
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&is_ambiguous, &error);
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if (sinfo->state == kCsOffline) {
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// wait-for-disconnect uses kCsOffline, we don't actually want to wait for 'offline'.
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if (t == nullptr) {
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SendOkay(fd);
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break;
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}
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} else if (t != nullptr &&
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(sinfo->state == kCsAny || sinfo->state == t->GetConnectionState())) {
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SendOkay(fd);
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break;
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}
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if (!is_ambiguous) {
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adb_pollfd pfd = {.fd = fd.get(), .events = POLLIN};
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int rc = adb_poll(&pfd, 1, 100);
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if (rc < 0) {
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SendFail(fd, error);
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break;
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} else if (rc > 0 && (pfd.revents & POLLHUP) != 0) {
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// The other end of the socket is closed, probably because the other side was
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// terminated, bail out.
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break;
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}
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// Try again...
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} else {
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SendFail(fd, error);
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break;
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}
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}
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D("wait_for_state is done");
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}
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void connect_emulator(const std::string& port_spec, std::string* response) {
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std::vector<std::string> pieces = android::base::Split(port_spec, ",");
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if (pieces.size() != 2) {
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*response = android::base::StringPrintf("unable to parse '%s' as <console port>,<adb port>",
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port_spec.c_str());
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return;
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}
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int console_port = strtol(pieces[0].c_str(), nullptr, 0);
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int adb_port = strtol(pieces[1].c_str(), nullptr, 0);
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if (console_port <= 0 || adb_port <= 0) {
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*response = android::base::StringPrintf("Invalid port numbers: %s", port_spec.c_str());
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return;
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}
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// Check if the emulator is already known.
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// Note: There's a small but harmless race condition here: An emulator not
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// present just yet could be registered by another invocation right
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// after doing this check here. However, local_connect protects
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// against double-registration too. From here, a better error message
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// can be produced. In the case of the race condition, the very specific
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// error message won't be shown, but the data doesn't get corrupted.
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atransport* known_emulator = find_emulator_transport_by_adb_port(adb_port);
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if (known_emulator != nullptr) {
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*response = android::base::StringPrintf("Emulator already registered on port %d", adb_port);
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return;
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}
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// Preconditions met, try to connect to the emulator.
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std::string error;
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if (!local_connect_arbitrary_ports(console_port, adb_port, &error)) {
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*response = android::base::StringPrintf("Connected to emulator on ports %d,%d",
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console_port, adb_port);
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} else {
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*response = android::base::StringPrintf("Could not connect to emulator on ports %d,%d: %s",
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console_port, adb_port, error.c_str());
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}
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}
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static void connect_service(unique_fd fd, std::string host) {
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std::string response;
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if (!strncmp(host.c_str(), "emu:", 4)) {
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connect_emulator(host.c_str() + 4, &response);
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} else {
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connect_device(host, &response);
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}
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// Send response for emulator and device
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SendProtocolString(fd.get(), response);
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}
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#endif
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#if ADB_HOST
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asocket* host_service_to_socket(std::string_view name, std::string_view serial,
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TransportId transport_id) {
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if (name == "track-devices") {
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return create_device_tracker(false);
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} else if (name == "track-devices-l") {
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return create_device_tracker(true);
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} else if (ConsumePrefix(&name, "wait-for-")) {
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std::shared_ptr<state_info> sinfo = std::make_shared<state_info>();
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if (sinfo == nullptr) {
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fprintf(stderr, "couldn't allocate state_info: %s", strerror(errno));
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return nullptr;
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}
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sinfo->serial = serial;
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sinfo->transport_id = transport_id;
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if (ConsumePrefix(&name, "local")) {
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sinfo->transport_type = kTransportLocal;
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} else if (ConsumePrefix(&name, "usb")) {
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sinfo->transport_type = kTransportUsb;
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} else if (ConsumePrefix(&name, "any")) {
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sinfo->transport_type = kTransportAny;
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} else {
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return nullptr;
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}
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if (name == "-device") {
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sinfo->state = kCsDevice;
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} else if (name == "-recovery") {
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sinfo->state = kCsRecovery;
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} else if (name == "-rescue") {
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sinfo->state = kCsRescue;
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} else if (name == "-sideload") {
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sinfo->state = kCsSideload;
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} else if (name == "-bootloader") {
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sinfo->state = kCsBootloader;
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} else if (name == "-any") {
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sinfo->state = kCsAny;
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} else if (name == "-disconnect") {
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sinfo->state = kCsOffline;
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} else {
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return nullptr;
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}
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unique_fd fd = create_service_thread(
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"wait", [sinfo](unique_fd fd) { wait_for_state(std::move(fd), sinfo.get()); });
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return create_local_socket(std::move(fd));
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} else if (ConsumePrefix(&name, "connect:")) {
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std::string host(name);
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unique_fd fd = create_service_thread(
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"connect", std::bind(connect_service, std::placeholders::_1, host));
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return create_local_socket(std::move(fd));
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}
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return nullptr;
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}
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#endif /* ADB_HOST */
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