1 /*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define TRACE_TAG SERVICES
18
19 #include "sysdeps.h"
20
21 #include <errno.h>
22 #include <stddef.h>
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <string.h>
26
27 #include <cstring>
28 #include <thread>
29
30 #include <android-base/stringprintf.h>
31 #include <android-base/strings.h>
32 #include <cutils/sockets.h>
33
34 #include "adb.h"
35 #include "adb_io.h"
36 #include "adb_unique_fd.h"
37 #include "adb_utils.h"
38 #include "adb_wifi.h"
39 #include "services.h"
40 #include "socket_spec.h"
41 #include "sysdeps.h"
42 #include "transport.h"
43
44 namespace {
45
service_bootstrap_func(std::string service_name,std::function<void (unique_fd)> func,unique_fd fd)46 void service_bootstrap_func(std::string service_name, std::function<void(unique_fd)> func,
47 unique_fd fd) {
48 adb_thread_setname(android::base::StringPrintf("%s svc %d", service_name.c_str(), fd.get()));
49 func(std::move(fd));
50 }
51
52 } // namespace
53
create_service_thread(const char * service_name,std::function<void (unique_fd)> func)54 unique_fd create_service_thread(const char* service_name, std::function<void(unique_fd)> func) {
55 int s[2];
56 if (adb_socketpair(s)) {
57 printf("cannot create service socket pair\n");
58 return unique_fd();
59 }
60 D("socketpair: (%d,%d)", s[0], s[1]);
61
62 #if !ADB_HOST
63 if (strcmp(service_name, "sync") == 0) {
64 // Set file sync service socket to maximum size
65 int max_buf = LINUX_MAX_SOCKET_SIZE;
66 adb_setsockopt(s[0], SOL_SOCKET, SO_SNDBUF, &max_buf, sizeof(max_buf));
67 adb_setsockopt(s[1], SOL_SOCKET, SO_SNDBUF, &max_buf, sizeof(max_buf));
68 }
69 #endif // !ADB_HOST
70
71 std::thread(service_bootstrap_func, service_name, func, unique_fd(s[1])).detach();
72
73 D("service thread started, %d:%d", s[0], s[1]);
74 return unique_fd(s[0]);
75 }
76
service_to_fd(std::string_view name,atransport * transport)77 unique_fd service_to_fd(std::string_view name, atransport* transport) {
78 unique_fd ret;
79
80 if (is_socket_spec(name)) {
81 std::string error;
82 if (!socket_spec_connect(&ret, name, nullptr, nullptr, &error)) {
83 LOG(ERROR) << "failed to connect to socket '" << name << "': " << error;
84 }
85 } else {
86 #if !ADB_HOST
87 ret = daemon_service_to_fd(name, transport);
88 #endif
89 }
90
91 if (ret >= 0) {
92 close_on_exec(ret.get());
93 }
94 return ret;
95 }
96
97 #if ADB_HOST
connect_emulator(const std::string & port_spec,std::string * response)98 void connect_emulator(const std::string& port_spec, std::string* response) {
99 std::vector<std::string> pieces = android::base::Split(port_spec, ",");
100 if (pieces.size() != 2) {
101 *response = android::base::StringPrintf("unable to parse '%s' as <console port>,<adb port>",
102 port_spec.c_str());
103 return;
104 }
105
106 int console_port = strtol(pieces[0].c_str(), nullptr, 0);
107 int adb_port = strtol(pieces[1].c_str(), nullptr, 0);
108 if (console_port <= 0 || adb_port <= 0) {
109 *response = android::base::StringPrintf("Invalid port numbers: %s", port_spec.c_str());
110 return;
111 }
112
113 // Check if the emulator is already known.
114 // Note: There's a small but harmless race condition here: An emulator not
115 // present just yet could be registered by another invocation right
116 // after doing this check here. However, local_connect protects
117 // against double-registration too. From here, a better error message
118 // can be produced. In the case of the race condition, the very specific
119 // error message won't be shown, but the data doesn't get corrupted.
120 atransport* known_emulator = find_emulator_transport_by_adb_port(adb_port);
121 if (known_emulator != nullptr) {
122 *response = android::base::StringPrintf("Emulator already registered on port %d", adb_port);
123 return;
124 }
125
126 // Preconditions met, try to connect to the emulator.
127 std::string error;
128 if (!local_connect_arbitrary_ports(console_port, adb_port, &error)) {
129 *response = android::base::StringPrintf("Connected to emulator on ports %d,%d",
130 console_port, adb_port);
131 } else {
132 *response = android::base::StringPrintf("Could not connect to emulator on ports %d,%d: %s",
133 console_port, adb_port, error.c_str());
134 }
135 }
136
connect_service(unique_fd fd,std::string host)137 static void connect_service(unique_fd fd, std::string host) {
138 std::string response;
139 if (!strncmp(host.c_str(), "emu:", 4)) {
140 connect_emulator(host.c_str() + 4, &response);
141 } else {
142 connect_device(host, &response);
143 }
144
145 // Send response for emulator and device
146 SendProtocolString(fd.get(), response);
147 }
148
pair_service(unique_fd fd,std::string host,std::string password)149 static void pair_service(unique_fd fd, std::string host, std::string password) {
150 std::string response;
151 adb_wifi_pair_device(host, password, response);
152 if (android::base::StartsWith(response, "Successful")) {
153 SendProtocolString(fd.get(), response);
154 } else {
155 SendFail(fd, response);
156 }
157 }
158
wait_service(unique_fd fd,std::string serial,TransportId transport_id,std::string spec)159 static void wait_service(unique_fd fd, std::string serial, TransportId transport_id,
160 std::string spec) {
161 std::vector<std::string> components = android::base::Split(spec, "-");
162 if (components.size() < 2) {
163 SendFail(fd, "short wait-for-: " + spec);
164 return;
165 }
166
167 TransportType transport_type;
168 if (components[0] == "local") {
169 transport_type = kTransportLocal;
170 } else if (components[0] == "usb") {
171 transport_type = kTransportUsb;
172 } else if (components[0] == "any") {
173 transport_type = kTransportAny;
174 } else {
175 SendFail(fd, "bad wait-for- transport: " + spec);
176 return;
177 }
178
179 std::vector<ConnectionState> states;
180 for (size_t i = 1; i < components.size(); ++i) {
181 if (components[i] == "device") {
182 states.push_back(kCsDevice);
183 } else if (components[i] == "recovery") {
184 states.push_back(kCsRecovery);
185 } else if (components[i] == "rescue") {
186 states.push_back(kCsRescue);
187 } else if (components[i] == "sideload") {
188 states.push_back(kCsSideload);
189 } else if (components[i] == "bootloader") {
190 states.push_back(kCsBootloader);
191 } else if (components[i] == "any") {
192 states.push_back(kCsAny);
193 } else if (components[i] == "disconnect") {
194 states.push_back(kCsOffline);
195 } else {
196 SendFail(fd, "bad wait-for- state: " + spec);
197 return;
198 }
199 }
200
201 while (true) {
202 bool is_ambiguous = false;
203 std::string error = "unknown error";
204 atransport* t =
205 acquire_one_transport(transport_type, !serial.empty() ? serial.c_str() : nullptr,
206 transport_id, &is_ambiguous, &error);
207
208 // If the target transport disconnect (to wait-for) is unclear, punt
209 // to the user for corrective action (e.g. specify `adb -s <>
210 // wait-for-disconnect`).
211 if (is_ambiguous) {
212 SendFail(fd, error);
213 return;
214 }
215 for (const auto& state : states) {
216 if (state == kCsOffline) {
217 // Special case for wait-for-disconnect:
218 // We want to wait for USB devices to completely disappear, but
219 // TCP devices can go into the offline state, since we
220 // automatically reconnect (disabling WiFi or disconnecting
221 // from the WiFi connection would trigger transition from
222 // `device` to `offline`).
223 // If the transport is torn down (regardless of whether it is
224 // USB or wireless), unblock.
225 if (!t) {
226 SendOkay(fd);
227 return;
228 }
229 } else {
230 if (t && (state == kCsAny || state == t->GetConnectionState())) {
231 SendOkay(fd);
232 return;
233 }
234 }
235 }
236
237 // Sleep before retrying.
238 adb_pollfd pfd = {.fd = fd.get(), .events = POLLIN};
239 if (adb_poll(&pfd, 1, 100) != 0) {
240 // The other end of the socket is closed, probably because the
241 // client terminated. Bail out.
242 SendFail(fd, error);
243 return;
244 }
245 }
246 }
247 #endif
248
249 #if ADB_HOST
host_service_to_socket(std::string_view name,std::string_view serial,TransportId transport_id)250 asocket* host_service_to_socket(std::string_view name, std::string_view serial,
251 TransportId transport_id) {
252 if (name == "track-devices") {
253 return create_device_tracker(SHORT_TEXT);
254 } else if (name == "track-devices-l") {
255 return create_device_tracker(LONG_TEXT);
256 } else if (name == "track-devices-proto-binary") {
257 return create_device_tracker(PROTOBUF);
258 } else if (name == "track-devices-proto-text") {
259 return create_device_tracker(TEXT_PROTOBUF);
260 } else if (android::base::ConsumePrefix(&name, "wait-for-")) {
261 std::string spec(name);
262 unique_fd fd =
263 create_service_thread("wait", std::bind(wait_service, std::placeholders::_1,
264 std::string(serial), transport_id, spec));
265 return create_local_socket(std::move(fd));
266 } else if (android::base::ConsumePrefix(&name, "connect:")) {
267 std::string host(name);
268 unique_fd fd = create_service_thread(
269 "connect", std::bind(connect_service, std::placeholders::_1, host));
270 return create_local_socket(std::move(fd));
271 } else if (android::base::ConsumePrefix(&name, "pair:")) {
272 const char* divider = strchr(name.data(), ':');
273 if (!divider) {
274 return nullptr;
275 }
276 std::string password(name.data(), divider);
277 std::string host(divider + 1);
278 unique_fd fd = create_service_thread(
279 "pair", std::bind(pair_service, std::placeholders::_1, host, password));
280 return create_local_socket(std::move(fd));
281 }
282 return nullptr;
283 }
284 #endif /* ADB_HOST */
285