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Merge "adbd: compile for host."

Browse source 
am: b42946a6d3

Change-Id: Ib47212e298198fcd7f2a4be7f158c313a6e321d5
This commit is contained in:
Josh Gao 2019-01-24 14:09:29 -08:00 • committed by android-build-merger
commit 134576deba
18 changed files with 578 additions and 308 deletions
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131
adb/Android.bp
View file

@ -22,35 +22,16 @@ cc_defaults {
"-Wexit-time-destructors", "-Wexit-time-destructors",
"-Wno-unused-parameter", "-Wno-unused-parameter",
"-Wno-missing-field-initializers", "-Wno-missing-field-initializers",
"-Wthread-safety",
"-Wvla", "-Wvla",
"-DADB_HOST=1", // overridden by adbd_defaults
], ],
cpp_std: "experimental", cpp_std: "experimental",
use_version_lib: true, use_version_lib: true,
compile_multilib: "first", compile_multilib: "first",
product_variables: {
debuggable: {
cflags: [
"-DALLOW_ADBD_ROOT",
"-DALLOW_ADBD_DISABLE_VERITY",
"-DALLOW_ADBD_NO_AUTH",
],
},
},
target: { target: {
android: {
cflags: [
"-DADB_HOST=0",
"-Wthread-safety",
],
},
host: {
cflags: ["-DADB_HOST=1"],
},
darwin: { darwin: {
host_ldlibs: [ host_ldlibs: [
"-lpthread", "-lpthread",
@ -76,6 +57,9 @@ cc_defaults {
// MinGW hides some things behind _POSIX_SOURCE. // MinGW hides some things behind _POSIX_SOURCE.
"-D_POSIX_SOURCE", "-D_POSIX_SOURCE",
// Not supported yet.
"-Wno-thread-safety",
], ],
host_ldlibs: [ host_ldlibs: [
@ -84,15 +68,46 @@ cc_defaults {
"-luserenv", "-luserenv",
], ],
}, },
},
}
not_windows: { cc_defaults {
name: "adbd_defaults",
defaults: ["adb_defaults"],
cflags: ["-UADB_HOST", "-DADB_HOST=0"],
product_variables: {
debuggable: {
cflags: [ cflags: [
"-Wthread-safety", "-DALLOW_ADBD_ROOT",
"-DALLOW_ADBD_DISABLE_VERITY",
"-DALLOW_ADBD_NO_AUTH",
], ],
}, },
}, },
} }
cc_defaults {
name: "host_adbd_supported",
host_supported: true,
target: {
linux: {
enabled: true,
host_ldlibs: [
"-lresolv", // b64_pton
"-lutil", // forkpty
],
},
darwin: {
enabled: false,
},
windows: {
enabled: false,
},
},
}
// libadb // libadb
// ========================================================= // =========================================================
// These files are compiled for both the host and the device. // These files are compiled for both the host and the device.
@ -313,7 +328,7 @@ cc_binary_host {
// libadbd_core contains the common sources to build libadbd and libadbd_services. // libadbd_core contains the common sources to build libadbd and libadbd_services.
cc_library_static { cc_library_static {
name: "libadbd_core", name: "libadbd_core",
defaults: ["adb_defaults"], defaults: ["adbd_defaults", "host_adbd_supported"],
recovery_available: true, recovery_available: true,
// libminadbd wants both, as it's used to build native tests. // libminadbd wants both, as it's used to build native tests.
@ -322,9 +337,6 @@ cc_library_static {
srcs: libadb_srcs + libadb_posix_srcs + [ srcs: libadb_srcs + libadb_posix_srcs + [
"daemon/auth.cpp", "daemon/auth.cpp",
"daemon/jdwp_service.cpp", "daemon/jdwp_service.cpp",
"daemon/usb.cpp",
"daemon/usb_ffs.cpp",
"daemon/usb_legacy.cpp",
], ],
local_include_dirs: [ local_include_dirs: [
@ -335,7 +347,6 @@ cc_library_static {
static_libs: [ static_libs: [
"libdiagnose_usb", "libdiagnose_usb",
"libqemu_pipe",
], ],
shared_libs: [ shared_libs: [
@ -346,22 +357,36 @@ cc_library_static {
"libcutils", "libcutils",
"liblog", "liblog",
], ],
target: {
android: {
whole_static_libs: [
"libqemu_pipe",
],
srcs: [
"daemon/transport_qemu.cpp",
"daemon/usb.cpp",
"daemon/usb_ffs.cpp",
"daemon/usb_legacy.cpp",
]
},
linux_glibc: {
srcs: [
"daemon/usb_dummy.cpp",
]
}
},
} }
cc_library { cc_library {
name: "libadbd_services", name: "libadbd_services",
defaults: ["adb_defaults"], defaults: ["adbd_defaults", "host_adbd_supported"],
recovery_available: true, recovery_available: true,
compile_multilib: "both", compile_multilib: "both",
srcs: [ srcs: [
"daemon/abb_service.cpp",
"daemon/file_sync_service.cpp", "daemon/file_sync_service.cpp",
"daemon/framebuffer_service.cpp",
"daemon/mdns.cpp",
"daemon/remount_service.cpp",
"daemon/services.cpp", "daemon/services.cpp",
"daemon/set_verity_enable_state_service.cpp",
"daemon/shell_service.cpp", "daemon/shell_service.cpp",
"shell_service_protocol.cpp", "shell_service_protocol.cpp",
], ],
@ -373,27 +398,41 @@ cc_library {
static_libs: [ static_libs: [
"libadbd_core", "libadbd_core",
"libavb_user",
"libdiagnose_usb", "libdiagnose_usb",
"libqemu_pipe",
], ],
shared_libs: [ shared_libs: [
"libasyncio", "libasyncio",
"libbase", "libbase",
"libbootloader_message",
"libcrypto", "libcrypto",
"libcrypto_utils", "libcrypto_utils",
"libcutils", "libcutils",
"libext4_utils",
"libfec",
"libfs_mgr",
"liblog", "liblog",
"libmdnssd",
"libselinux",
], ],
target: { target: {
android: {
srcs: [
"daemon/abb_service.cpp",
"daemon/framebuffer_service.cpp",
"daemon/mdns.cpp",
"daemon/reboot_service.cpp",
"daemon/remount_service.cpp",
"daemon/restart_service.cpp",
"daemon/set_verity_enable_state_service.cpp",
],
static_libs: [
"libavb_user",
],
shared_libs: [
"libbootloader_message",
"libmdnssd",
"libext4_utils",
"libfec",
"libfs_mgr",
"libselinux",
],
},
recovery: { recovery: {
exclude_srcs: [ exclude_srcs: [
"daemon/abb_service.cpp", "daemon/abb_service.cpp",
@ -404,7 +443,7 @@ cc_library {
cc_library { cc_library {
name: "libadbd", name: "libadbd",
defaults: ["adb_defaults"], defaults: ["adbd_defaults", "host_adbd_supported"],
recovery_available: true, recovery_available: true,
// Avoid getting duplicate symbol of android::build::GetBuildNumber(). // Avoid getting duplicate symbol of android::build::GetBuildNumber().
@ -435,7 +474,7 @@ cc_library {
cc_binary { cc_binary {
name: "adbd", name: "adbd",
defaults: ["adb_defaults"], defaults: ["adbd_defaults", "host_adbd_supported"],
recovery_available: true, recovery_available: true,
srcs: [ srcs: [
@ -467,7 +506,7 @@ cc_binary {
cc_binary { cc_binary {
name: "abb", name: "abb",
defaults: ["adb_defaults"], defaults: ["adbd_defaults"],
recovery_available: false, recovery_available: false,
srcs: [ srcs: [
@ -500,7 +539,7 @@ cc_binary {
cc_test { cc_test {
name: "adbd_test", name: "adbd_test",
defaults: ["adb_defaults"], defaults: ["adbd_defaults"],
srcs: libadb_test_srcs + [ srcs: libadb_test_srcs + [
"daemon/services.cpp", "daemon/services.cpp",
"daemon/shell_service.cpp", "daemon/shell_service.cpp",

4
adb/adb_trace.cpp
View file

@ -32,7 +32,9 @@
#if !ADB_HOST #if !ADB_HOST
const char* adb_device_banner = "device"; const char* adb_device_banner = "device";
#if defined(__ANDROID__)
static android::base::LogdLogger gLogdLogger; static android::base::LogdLogger gLogdLogger;
#endif
#else #else
const char* adb_device_banner = "host"; const char* adb_device_banner = "host";
#endif #endif
@ -46,7 +48,7 @@ void AdbLogger(android::base::LogId id, android::base::LogSeverity severity,
fflush(stderr); fflush(stderr);
#endif #endif
#if !ADB_HOST #if !ADB_HOST && defined(__ANDROID__)
// Only print logs of INFO or higher to logcat, so that `adb logcat` with adbd tracing on // Only print logs of INFO or higher to logcat, so that `adb logcat` with adbd tracing on
// doesn't result in exponential logging. // doesn't result in exponential logging.
if (severity >= android::base::INFO) { if (severity >= android::base::INFO) {

2
adb/daemon/auth.cpp
View file

@ -67,7 +67,7 @@ bool adbd_auth_verify(const char* token, size_t token_size, const std::string& s
// b64_pton requires one additional byte in the target buffer for // b64_pton requires one additional byte in the target buffer for
// decoding to succeed. See http://b/28035006 for details. // decoding to succeed. See http://b/28035006 for details.
uint8_t keybuf[ANDROID_PUBKEY_ENCODED_SIZE + 1]; uint8_t keybuf[ANDROID_PUBKEY_ENCODED_SIZE + 1];
if (__b64_pton(line.c_str(), keybuf, sizeof(keybuf)) != ANDROID_PUBKEY_ENCODED_SIZE) { if (b64_pton(line.c_str(), keybuf, sizeof(keybuf)) != ANDROID_PUBKEY_ENCODED_SIZE) {
LOG(ERROR) << "Invalid base64 key " << line.c_str() << " in " << path; LOG(ERROR) << "Invalid base64 key " << line.c_str() << " in " << path;
continue; continue;
} }

22
adb/daemon/file_sync_service.cpp
View file

@ -22,13 +22,11 @@
#include <dirent.h> #include <dirent.h>
#include <errno.h> #include <errno.h>
#include <linux/xattr.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <sys/stat.h> #include <sys/stat.h>
#include <sys/types.h> #include <sys/types.h>
#include <sys/xattr.h>
#include <unistd.h> #include <unistd.h>
#include <utime.h> #include <utime.h>
@ -37,11 +35,17 @@
#include <vector> #include <vector>
#include <android-base/file.h> #include <android-base/file.h>
#include <android-base/macros.h>
#include <android-base/stringprintf.h> #include <android-base/stringprintf.h>
#include <android-base/strings.h> #include <android-base/strings.h>
#include <private/android_filesystem_config.h> #include <private/android_filesystem_config.h>
#include <private/android_logger.h> #include <private/android_logger.h>
#if defined(__ANDROID__)
#include <selinux/android.h> #include <selinux/android.h>
#include <sys/xattr.h>
#endif
#include "adb.h" #include "adb.h"
#include "adb_io.h" #include "adb_io.h"
@ -55,11 +59,17 @@ using android::base::Dirname;
using android::base::StringPrintf; using android::base::StringPrintf;
static bool should_use_fs_config(const std::string& path) { static bool should_use_fs_config(const std::string& path) {
#if defined(__ANDROID__)
// TODO: use fs_config to configure permissions on /data too. // TODO: use fs_config to configure permissions on /data too.
return !android::base::StartsWith(path, "/data/"); return !android::base::StartsWith(path, "/data/");
#else
UNUSED(path);
return false;
#endif
} }
static bool update_capabilities(const char* path, uint64_t capabilities) { static bool update_capabilities(const char* path, uint64_t capabilities) {
#if defined(__ANDROID__)
if (capabilities == 0) { if (capabilities == 0) {
// Ensure we clean up in case the capabilities weren't 0 in the past. // Ensure we clean up in case the capabilities weren't 0 in the past.
removexattr(path, XATTR_NAME_CAPS); removexattr(path, XATTR_NAME_CAPS);
@ -73,6 +83,10 @@ static bool update_capabilities(const char* path, uint64_t capabilities) {
cap_data.data[1].permitted = (capabilities >> 32); cap_data.data[1].permitted = (capabilities >> 32);
cap_data.data[1].inheritable = 0; cap_data.data[1].inheritable = 0;
return setxattr(path, XATTR_NAME_CAPS, &cap_data, sizeof(cap_data), 0) != -1; return setxattr(path, XATTR_NAME_CAPS, &cap_data, sizeof(cap_data), 0) != -1;
#else
UNUSED(path, capabilities);
return true;
#endif
} }
static bool secure_mkdirs(const std::string& path) { static bool secure_mkdirs(const std::string& path) {
@ -105,8 +119,10 @@ static bool secure_mkdirs(const std::string& path) {
} else { } else {
if (chown(partial_path.c_str(), uid, gid) == -1) return false; if (chown(partial_path.c_str(), uid, gid) == -1) return false;
#if defined(__ANDROID__)
// Not all filesystems support setting SELinux labels. http://b/23530370. // Not all filesystems support setting SELinux labels. http://b/23530370.
selinux_android_restorecon(partial_path.c_str(), 0); selinux_android_restorecon(partial_path.c_str(), 0);
#endif
if (!update_capabilities(partial_path.c_str(), capabilities)) return false; if (!update_capabilities(partial_path.c_str(), capabilities)) return false;
} }
@ -242,8 +258,10 @@ static bool handle_send_file(int s, const char* path, uid_t uid, gid_t gid, uint
goto fail; goto fail;
} }
#if defined(__ANDROID__)
// Not all filesystems support setting SELinux labels. http://b/23530370. // Not all filesystems support setting SELinux labels. http://b/23530370.
selinux_android_restorecon(path, 0); selinux_android_restorecon(path, 0);
#endif
// fchown clears the setuid bit - restore it if present. // fchown clears the setuid bit - restore it if present.
// Ignore the result of calling fchmod. It's not supported // Ignore the result of calling fchmod. It's not supported

2
adb/daemon/framebuffer_service.h
View file

@ -18,4 +18,6 @@
#include "adb_unique_fd.h" #include "adb_unique_fd.h"
#if defined(__ANDROID__)
void framebuffer_service(unique_fd fd); void framebuffer_service(unique_fd fd);
#endif

48
adb/daemon/main.cpp
View file

@ -18,7 +18,10 @@
#include "sysdeps.h" #include "sysdeps.h"
#if defined(__BIONIC__)
#include <android/fdsan.h> #include <android/fdsan.h>
#endif
#include <errno.h> #include <errno.h>
#include <getopt.h> #include <getopt.h>
#include <malloc.h> #include <malloc.h>
@ -34,12 +37,15 @@
#include <android-base/macros.h> #include <android-base/macros.h>
#include <android-base/properties.h> #include <android-base/properties.h>
#include <android-base/stringprintf.h> #include <android-base/stringprintf.h>
#if defined(__ANDROID__)
#include <libminijail.h> #include <libminijail.h>
#include <log/log_properties.h> #include <log/log_properties.h>
#include <scoped_minijail.h> #include <scoped_minijail.h>
#include <private/android_filesystem_config.h> #include <private/android_filesystem_config.h>
#include "selinux/android.h" #include "selinux/android.h"
#endif
#include "adb.h" #include "adb.h"
#include "adb_auth.h" #include "adb_auth.h"
@ -49,6 +55,7 @@
#include "mdns.h" #include "mdns.h"
#if defined(__ANDROID__)
static const char* root_seclabel = nullptr; static const char* root_seclabel = nullptr;
static bool should_drop_capabilities_bounding_set() { static bool should_drop_capabilities_bounding_set() {
@ -167,10 +174,14 @@ static void drop_privileges(int server_port) {
} }
} }
} }
#endif
static void setup_port(int port) { static void setup_port(int port) {
LOG(INFO) << "adbd listening on port " << port;
local_init(port); local_init(port);
#if defined(__ANDROID__)
setup_mdns(port); setup_mdns(port);
#endif
} }
int adbd_main(int server_port) { int adbd_main(int server_port) {
@ -178,10 +189,12 @@ int adbd_main(int server_port) {
signal(SIGPIPE, SIG_IGN); signal(SIGPIPE, SIG_IGN);
#if defined(__BIONIC__)
auto fdsan_level = android_fdsan_get_error_level(); auto fdsan_level = android_fdsan_get_error_level();
if (fdsan_level == ANDROID_FDSAN_ERROR_LEVEL_DISABLED) { if (fdsan_level == ANDROID_FDSAN_ERROR_LEVEL_DISABLED) {
android_fdsan_set_error_level(ANDROID_FDSAN_ERROR_LEVEL_WARN_ONCE); android_fdsan_set_error_level(ANDROID_FDSAN_ERROR_LEVEL_WARN_ONCE);
} }
#endif
init_transport_registration(); init_transport_registration();
@ -206,14 +219,19 @@ int adbd_main(int server_port) {
" unchanged.\n"); " unchanged.\n");
} }
#if defined(__ANDROID__)
drop_privileges(server_port); drop_privileges(server_port);
#endif
bool is_usb = false; bool is_usb = false;
#if defined(__ANDROID__)
if (access(USB_FFS_ADB_EP0, F_OK) == 0) { if (access(USB_FFS_ADB_EP0, F_OK) == 0) {
// Listen on USB. // Listen on USB.
usb_init(); usb_init();
is_usb = true; is_usb = true;
} }
#endif
// If one of these properties is set, also listen on that port. // If one of these properties is set, also listen on that port.
// If one of the properties isn't set and we couldn't listen on usb, listen // If one of the properties isn't set and we couldn't listen on usb, listen
@ -244,8 +262,10 @@ int adbd_main(int server_port) {
} }
int main(int argc, char** argv) { int main(int argc, char** argv) {
#if defined(__BIONIC__)
// Set M_DECAY_TIME so that our allocations aren't immediately purged on free. // Set M_DECAY_TIME so that our allocations aren't immediately purged on free.
mallopt(M_DECAY_TIME, 1); mallopt(M_DECAY_TIME, 1);
#endif
while (true) { while (true) {
static struct option opts[] = { static struct option opts[] = {
@ -261,19 +281,21 @@ int main(int argc, char** argv) {
} }
switch (c) { switch (c) {
case 's': #if defined(__ANDROID__)
root_seclabel = optarg; case 's':
break; root_seclabel = optarg;
case 'b': break;
adb_device_banner = optarg; #endif
break; case 'b':
case 'v': adb_device_banner = optarg;
printf("Android Debug Bridge Daemon version %d.%d.%d\n", ADB_VERSION_MAJOR, break;
ADB_VERSION_MINOR, ADB_SERVER_VERSION); case 'v':
return 0; printf("Android Debug Bridge Daemon version %d.%d.%d\n", ADB_VERSION_MAJOR,
default: ADB_VERSION_MINOR, ADB_SERVER_VERSION);
// getopt already prints "adbd: invalid option -- %c" for us. return 0;
return 1; default:
// getopt already prints "adbd: invalid option -- %c" for us.
return 1;
} }
} }

84
adb/daemon/reboot_service.cpp Normal file
View file

@ -0,0 +1,84 @@
/*
* Copyright (C) 2018 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 <stdlib.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <string>
#include <android-base/logging.h>
#include <android-base/properties.h>
#include <android-base/stringprintf.h>
#include <bootloader_message/bootloader_message.h>
#include <cutils/android_reboot.h>
#include "adb_io.h"
#include "adb_unique_fd.h"
void reboot_service(unique_fd fd, const std::string& arg) {
std::string reboot_arg = arg;
sync();
if (reboot_arg.empty()) reboot_arg = "adb";
std::string reboot_string = android::base::StringPrintf("reboot,%s", reboot_arg.c_str());
if (reboot_arg == "fastboot" &&
android::base::GetBoolProperty("ro.boot.dynamic_partitions", false) &&
access("/dev/socket/recovery", F_OK) == 0) {
LOG(INFO) << "Recovery specific reboot fastboot";
/*
* The socket is created to allow switching between recovery and
* fastboot.
*/
android::base::unique_fd sock(socket(AF_UNIX, SOCK_STREAM, 0));
if (sock < 0) {
WriteFdFmt(fd, "reboot (%s) create\n", strerror(errno));
PLOG(ERROR) << "Creating recovery socket failed";
return;
}
sockaddr_un addr = {.sun_family = AF_UNIX};
strncpy(addr.sun_path, "/dev/socket/recovery", sizeof(addr.sun_path) - 1);
if (connect(sock, reinterpret_cast<sockaddr*>(&addr), sizeof(addr)) == -1) {
WriteFdFmt(fd, "reboot (%s) connect\n", strerror(errno));
PLOG(ERROR) << "Couldn't connect to recovery socket";
return;
}
const char msg_switch_to_fastboot = 'f';
auto ret = adb_write(sock, &msg_switch_to_fastboot, sizeof(msg_switch_to_fastboot));
if (ret != sizeof(msg_switch_to_fastboot)) {
WriteFdFmt(fd, "reboot (%s) write\n", strerror(errno));
PLOG(ERROR) << "Couldn't write message to recovery socket to switch to fastboot";
return;
}
} else {
if (!android::base::SetProperty(ANDROID_RB_PROPERTY, reboot_string)) {
WriteFdFmt(fd.get(), "reboot (%s) failed\n", reboot_string.c_str());
return;
}
}
// Don't return early. Give the reboot command time to take effect
// to avoid messing up scripts which do "adb reboot && adb wait-for-device"
while (true) {
pause();
}
}

25
adb/daemon/reboot_service.h Normal file
View file

@ -0,0 +1,25 @@
/*
* Copyright (C) 2018 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.
*/
#pragma once
#include <string>
#include "adb_unique_fd.h"
#if defined(__ANDROID__)
void reboot_service(unique_fd fd, const std::string& arg);
#endif

2
adb/daemon/remount_service.h
View file

@ -20,5 +20,7 @@
#include "adb_unique_fd.h" #include "adb_unique_fd.h"
#if defined(__ANDROID__)
bool make_block_device_writable(const std::string&); bool make_block_device_writable(const std::string&);
void remount_service(unique_fd, const std::string&); void remount_service(unique_fd, const std::string&);
#endif

66
adb/daemon/restart_service.cpp Normal file
View file

@ -0,0 +1,66 @@
/*
* Copyright (C) 2019 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 <unistd.h>
#include <android-base/properties.h>
#include <android-base/stringprintf.h>
#include <log/log_properties.h>
#include "adb_io.h"
#include "adb_unique_fd.h"
void restart_root_service(unique_fd fd) {
if (getuid() == 0) {
WriteFdExactly(fd.get(), "adbd is already running as root\n");
return;
}
if (!__android_log_is_debuggable()) {
WriteFdExactly(fd.get(), "adbd cannot run as root in production builds\n");
return;
}
android::base::SetProperty("service.adb.root", "1");
WriteFdExactly(fd.get(), "restarting adbd as root\n");
}
void restart_unroot_service(unique_fd fd) {
if (getuid() != 0) {
WriteFdExactly(fd.get(), "adbd not running as root\n");
return;
}
android::base::SetProperty("service.adb.root", "0");
WriteFdExactly(fd.get(), "restarting adbd as non root\n");
}
void restart_tcp_service(unique_fd fd, int port) {
if (port <= 0) {
WriteFdFmt(fd.get(), "invalid port %d\n", port);
return;
}
android::base::SetProperty("service.adb.tcp.port", android::base::StringPrintf("%d", port));
WriteFdFmt(fd.get(), "restarting in TCP mode port: %d\n", port);
}
void restart_usb_service(unique_fd fd) {
android::base::SetProperty("service.adb.tcp.port", "0");
WriteFdExactly(fd.get(), "restarting in USB mode\n");
}

26
adb/daemon/restart_service.h Normal file
View file

@ -0,0 +1,26 @@
/*
* Copyright (C) 2019 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.
*/
#pragma once
#include "adb_unique_fd.h"
#if defined(__ANDROID__)
void restart_root_service(unique_fd fd);
void restart_unroot_service(unique_fd fd);
void restart_tcp_service(unique_fd fd, int port);
void restart_usb_service(unique_fd fd);
#endif

145
adb/daemon/services.cpp
View file

@ -39,8 +39,6 @@
#include <android-base/stringprintf.h> #include <android-base/stringprintf.h>
#include <android-base/strings.h> #include <android-base/strings.h>
#include <android-base/unique_fd.h> #include <android-base/unique_fd.h>
#include <bootloader_message/bootloader_message.h>
#include <cutils/android_reboot.h>
#include <cutils/sockets.h> #include <cutils/sockets.h>
#include <log/log_properties.h> #include <log/log_properties.h>
@ -55,96 +53,12 @@
#include "daemon/file_sync_service.h" #include "daemon/file_sync_service.h"
#include "daemon/framebuffer_service.h" #include "daemon/framebuffer_service.h"
#include "daemon/reboot_service.h"
#include "daemon/remount_service.h" #include "daemon/remount_service.h"
#include "daemon/restart_service.h"
#include "daemon/set_verity_enable_state_service.h" #include "daemon/set_verity_enable_state_service.h"
#include "daemon/shell_service.h" #include "daemon/shell_service.h"
void restart_root_service(unique_fd fd) {
if (getuid() == 0) {
WriteFdExactly(fd.get(), "adbd is already running as root\n");
return;
}
if (!__android_log_is_debuggable()) {
WriteFdExactly(fd.get(), "adbd cannot run as root in production builds\n");
return;
}
android::base::SetProperty("service.adb.root", "1");
WriteFdExactly(fd.get(), "restarting adbd as root\n");
}
void restart_unroot_service(unique_fd fd) {
if (getuid() != 0) {
WriteFdExactly(fd.get(), "adbd not running as root\n");
return;
}
android::base::SetProperty("service.adb.root", "0");
WriteFdExactly(fd.get(), "restarting adbd as non root\n");
}
void restart_tcp_service(unique_fd fd, int port) {
if (port <= 0) {
WriteFdFmt(fd.get(), "invalid port %d\n", port);
return;
}
android::base::SetProperty("service.adb.tcp.port", android::base::StringPrintf("%d", port));
WriteFdFmt(fd.get(), "restarting in TCP mode port: %d\n", port);
}
void restart_usb_service(unique_fd fd) {
android::base::SetProperty("service.adb.tcp.port", "0");
WriteFdExactly(fd.get(), "restarting in USB mode\n");
}
void reboot_service(unique_fd fd, const std::string& arg) {
std::string reboot_arg = arg;
sync();
if (reboot_arg.empty()) reboot_arg = "adb";
std::string reboot_string = android::base::StringPrintf("reboot,%s", reboot_arg.c_str());
if (reboot_arg == "fastboot" &&
android::base::GetBoolProperty("ro.boot.dynamic_partitions", false) &&
access("/dev/socket/recovery", F_OK) == 0) {
LOG(INFO) << "Recovery specific reboot fastboot";
/*
* The socket is created to allow switching between recovery and
* fastboot.
*/
android::base::unique_fd sock(socket(AF_UNIX, SOCK_STREAM, 0));
if (sock < 0) {
WriteFdFmt(fd, "reboot (%s) create\n", strerror(errno));
PLOG(ERROR) << "Creating recovery socket failed";
return;
}
sockaddr_un addr = {.sun_family = AF_UNIX};
strncpy(addr.sun_path, "/dev/socket/recovery", sizeof(addr.sun_path) - 1);
if (connect(sock, reinterpret_cast<sockaddr*>(&addr), sizeof(addr)) == -1) {
WriteFdFmt(fd, "reboot (%s) connect\n", strerror(errno));
PLOG(ERROR) << "Couldn't connect to recovery socket";
return;
}
const char msg_switch_to_fastboot = 'f';
auto ret = adb_write(sock, &msg_switch_to_fastboot, sizeof(msg_switch_to_fastboot));
if (ret != sizeof(msg_switch_to_fastboot)) {
WriteFdFmt(fd, "reboot (%s) write\n", strerror(errno));
PLOG(ERROR) << "Couldn't write message to recovery socket to switch to fastboot";
return;
}
} else {
if (!android::base::SetProperty(ANDROID_RB_PROPERTY, reboot_string)) {
WriteFdFmt(fd.get(), "reboot (%s) failed\n", reboot_string.c_str());
return;
}
}
// Don't return early. Give the reboot command time to take effect
// to avoid messing up scripts which do "adb reboot && adb wait-for-device"
while (true) {
pause();
}
}
void reconnect_service(unique_fd fd, atransport* t) { void reconnect_service(unique_fd fd, atransport* t) {
WriteFdExactly(fd.get(), "done"); WriteFdExactly(fd.get(), "done");
@ -221,7 +135,8 @@ static void spin_service(unique_fd fd) {
} }
fdevent_run_on_main_thread([fd = pipe_read.release()]() { fdevent_run_on_main_thread([fd = pipe_read.release()]() {
fdevent* fde = fdevent_create(fd, [](int, unsigned, void*) {}, nullptr); fdevent* fde = fdevent_create(
fd, [](int, unsigned, void*) {}, nullptr);
fdevent_add(fde, FDE_READ); fdevent_add(fde, FDE_READ);
}); });
@ -328,31 +243,16 @@ asocket* daemon_service_to_socket(std::string_view name) {
} }
unique_fd daemon_service_to_fd(std::string_view name, atransport* transport) { unique_fd daemon_service_to_fd(std::string_view name, atransport* transport) {
#ifndef __ANDROID_RECOVERY__ #if defined(__ANDROID__) && !defined(__ANDROID_RECOVERY__)
if (name.starts_with("abb:")) { if (name.starts_with("abb:")) {
name.remove_prefix(strlen("abb:")); name.remove_prefix(strlen("abb:"));
return execute_binder_command(name); return execute_binder_command(name);
} }
#endif #endif
if (name.starts_with("dev:")) { #if defined(__ANDROID__)
name.remove_prefix(strlen("dev:")); if (name.starts_with("framebuffer:")) {
return unique_fd{unix_open(name, O_RDWR | O_CLOEXEC)};
} else if (name.starts_with("framebuffer:")) {
return create_service_thread("fb", framebuffer_service); return create_service_thread("fb", framebuffer_service);
} else if (name.starts_with("jdwp:")) {
name.remove_prefix(strlen("jdwp:"));
std::string str(name);
return create_jdwp_connection_fd(atoi(str.c_str()));
} else if (name.starts_with("shell")) {
name.remove_prefix(strlen("shell"));
return ShellService(name, transport);
} else if (name.starts_with("exec:")) {
name.remove_prefix(strlen("exec:"));
return StartSubprocess(std::string(name), nullptr, SubprocessType::kRaw,
SubprocessProtocol::kNone);
} else if (name.starts_with("sync:")) {
return create_service_thread("sync", file_sync_service);
} else if (name.starts_with("remount:")) { } else if (name.starts_with("remount:")) {
std::string arg(name.begin() + strlen("remount:"), name.end()); std::string arg(name.begin() + strlen("remount:"), name.end());
return create_service_thread("remount", return create_service_thread("remount",
@ -373,6 +273,12 @@ unique_fd daemon_service_to_fd(std::string_view name, atransport* transport) {
} else if (name.starts_with("restore:")) { } else if (name.starts_with("restore:")) {
return StartSubprocess("/system/bin/bu restore", nullptr, SubprocessType::kRaw, return StartSubprocess("/system/bin/bu restore", nullptr, SubprocessType::kRaw,
SubprocessProtocol::kNone); SubprocessProtocol::kNone);
} else if (name.starts_with("disable-verity:")) {
return create_service_thread("verity-on", std::bind(set_verity_enabled_state_service,
std::placeholders::_1, false));
} else if (name.starts_with("enable-verity:")) {
return create_service_thread("verity-off", std::bind(set_verity_enabled_state_service,
std::placeholders::_1, true));
} else if (name.starts_with("tcpip:")) { } else if (name.starts_with("tcpip:")) {
name.remove_prefix(strlen("tcpip:")); name.remove_prefix(strlen("tcpip:"));
std::string str(name); std::string str(name);
@ -385,15 +291,28 @@ unique_fd daemon_service_to_fd(std::string_view name, atransport* transport) {
std::bind(restart_tcp_service, std::placeholders::_1, port)); std::bind(restart_tcp_service, std::placeholders::_1, port));
} else if (name.starts_with("usb:")) { } else if (name.starts_with("usb:")) {
return create_service_thread("usb", restart_usb_service); return create_service_thread("usb", restart_usb_service);
}
#endif
if (name.starts_with("dev:")) {
name.remove_prefix(strlen("dev:"));
return unique_fd{unix_open(name, O_RDWR | O_CLOEXEC)};
} else if (name.starts_with("jdwp:")) {
name.remove_prefix(strlen("jdwp:"));
std::string str(name);
return create_jdwp_connection_fd(atoi(str.c_str()));
} else if (name.starts_with("shell")) {
name.remove_prefix(strlen("shell"));
return ShellService(name, transport);
} else if (name.starts_with("exec:")) {
name.remove_prefix(strlen("exec:"));
return StartSubprocess(std::string(name), nullptr, SubprocessType::kRaw,
SubprocessProtocol::kNone);
} else if (name.starts_with("sync:")) {
return create_service_thread("sync", file_sync_service);
} else if (name.starts_with("reverse:")) { } else if (name.starts_with("reverse:")) {
name.remove_prefix(strlen("reverse:")); name.remove_prefix(strlen("reverse:"));
return reverse_service(name, transport); return reverse_service(name, transport);
} else if (name.starts_with("disable-verity:")) {
return create_service_thread("verity-on", std::bind(set_verity_enabled_state_service,
std::placeholders::_1, false));
} else if (name.starts_with("enable-verity:")) {
return create_service_thread("verity-off", std::bind(set_verity_enabled_state_service,
std::placeholders::_1, true));
} else if (name == "reconnect") { } else if (name == "reconnect") {
return create_service_thread( return create_service_thread(
"reconnect", std::bind(reconnect_service, std::placeholders::_1, transport)); "reconnect", std::bind(reconnect_service, std::placeholders::_1, transport));

2
adb/daemon/set_verity_enable_state_service.h
View file

@ -18,4 +18,6 @@
#include "adb_unique_fd.h" #include "adb_unique_fd.h"
#if defined(__ANDROID__)
void set_verity_enabled_state_service(unique_fd fd, bool enable); void set_verity_enabled_state_service(unique_fd fd, bool enable);
#endif

3
adb/daemon/shell_service.cpp
View file

@ -98,7 +98,10 @@
#include <android-base/properties.h> #include <android-base/properties.h>
#include <android-base/stringprintf.h> #include <android-base/stringprintf.h>
#include <private/android_logger.h> #include <private/android_logger.h>
#if defined(__ANDROID__)
#include <selinux/android.h> #include <selinux/android.h>
#endif
#include "adb.h" #include "adb.h"
#include "adb_io.h" #include "adb_io.h"

136
adb/daemon/transport_qemu.cpp Normal file
View file

@ -0,0 +1,136 @@
/*
* Copyright (C) 2019 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.
*/
// Include qemu_pipe.h before sysdeps, since it has inlined references to open, read, write.
#include <qemu_pipe.h>
#define TRACE_TAG TRANSPORT
#include "sysdeps.h"
#include "transport.h"
#include <android-base/properties.h>
#include "adb_io.h"
#include "adb_trace.h"
#include "adb_unique_fd.h"
/* A worker thread that monitors host connections, and registers a transport for
* every new host connection. This thread replaces server_socket_thread on
* condition that adbd daemon runs inside the emulator, and emulator uses QEMUD
* pipe to communicate with adbd daemon inside the guest. This is done in order
* to provide more robust communication channel between ADB host and guest. The
* main issue with server_socket_thread approach is that it runs on top of TCP,
* and thus is sensitive to network disruptions. For instance, the
* ConnectionManager may decide to reset all network connections, in which case
* the connection between ADB host and guest will be lost. To make ADB traffic
* independent from the network, we use here 'adb' QEMUD service to transfer data
* between the host, and the guest. See external/qemu/android/adb-*.* that
* implements the emulator's side of the protocol. Another advantage of using
* QEMUD approach is that ADB will be up much sooner, since it doesn't depend
* anymore on network being set up.
* The guest side of the protocol contains the following phases:
* - Connect with adb QEMUD service. In this phase a handle to 'adb' QEMUD service
* is opened, and it becomes clear whether or not emulator supports that
* protocol.
* - Wait for the ADB host to create connection with the guest. This is done by
* sending an 'accept' request to the adb QEMUD service, and waiting on
* response.
* - When new ADB host connection is accepted, the connection with adb QEMUD
* service is registered as the transport, and a 'start' request is sent to the
* adb QEMUD service, indicating that the guest is ready to receive messages.
* Note that the guest will ignore messages sent down from the emulator before
* the transport registration is completed. That's why we need to send the
* 'start' request after the transport is registered.
*/
void qemu_socket_thread(int port) {
/* 'accept' request to the adb QEMUD service. */
static const char _accept_req[] = "accept";
/* 'start' request to the adb QEMUD service. */
static const char _start_req[] = "start";
/* 'ok' reply from the adb QEMUD service. */
static const char _ok_resp[] = "ok";
char tmp[256];
char con_name[32];
adb_thread_setname("qemu socket");
D("transport: qemu_socket_thread() starting");
/* adb QEMUD service connection request. */
snprintf(con_name, sizeof(con_name), "pipe:qemud:adb:%d", port);
/* Connect to the adb QEMUD service. */
unique_fd fd(qemu_pipe_open(con_name));
if (fd < 0) {
/* This could be an older version of the emulator, that doesn't
* implement adb QEMUD service. Fall back to the old TCP way. */
D("adb service is not available. Falling back to TCP socket.");
std::thread(server_socket_thread, port).detach();
return;
}
while (true) {
/*
* Wait till the host creates a new connection.
*/
/* Send the 'accept' request. */
if (WriteFdExactly(fd.get(), _accept_req, strlen(_accept_req))) {
/* Wait for the response. In the response we expect 'ok' on success,
* or 'ko' on failure. */
if (!ReadFdExactly(fd.get(), tmp, 2) || memcmp(tmp, _ok_resp, 2)) {
D("Accepting ADB host connection has failed.");
} else {
/* Host is connected. Register the transport, and start the
* exchange. */
std::string serial = android::base::StringPrintf("host-%d", fd.get());
WriteFdExactly(fd.get(), _start_req, strlen(_start_req));
register_socket_transport(std::move(fd), std::move(serial), port, 1,
[](atransport*) { return ReconnectResult::Abort; });
}
/* Prepare for accepting of the next ADB host connection. */
fd.reset(qemu_pipe_open(con_name));
if (fd < 0) {
D("adb service become unavailable.");
return;
}
} else {
D("Unable to send the '%s' request to ADB service.", _accept_req);
return;
}
}
D("transport: qemu_socket_thread() exiting");
return;
}
// If adbd is running inside the emulator, it will normally use QEMUD pipe (aka
// goldfish) as the transport. This can either be explicitly set by the
// service.adb.transport property, or be inferred from ro.kernel.qemu that is
// set to "1" for ranchu/goldfish.
bool use_qemu_goldfish() {
// Legacy way to detect if adbd should use the goldfish pipe is to check for
// ro.kernel.qemu, keep that behaviour for backward compatibility.
if (android::base::GetBoolProperty("ro.kernel.qemu", false)) {
return true;
}
// If service.adb.transport is present and is set to "goldfish", use the
// QEMUD pipe.
if (android::base::GetProperty("service.adb.transport", "") == "goldfish") {
return true;
}
return false;
}

38
adb/daemon/usb_dummy.cpp Normal file
View file

@ -0,0 +1,38 @@
/*
* Copyright (C) 2019 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.
*/
#include <adbd/usb.h>
#include <android-base/logging.h>
int usb_write(usb_handle*, const void*, int) {
LOG(FATAL) << "unimplemented";
return -1;
}
int usb_read(usb_handle*, void*, int) {
LOG(FATAL) << "unimplemented";
return -1;
}
int usb_close(usb_handle*) {
LOG(FATAL) << "unimplemented";
return -1;
}
void usb_kick(usb_handle*) {
LOG(FATAL) << "unimplemented";
}

10
adb/transport.h
View file

@ -399,4 +399,14 @@ void send_packet(apacket* p, atransport* t);
asocket* create_device_tracker(bool long_output); asocket* create_device_tracker(bool long_output);
#if !ADB_HOST
void server_socket_thread(int port);
#if defined(__ANDROID__)
void qemu_socket_thread(int port);
bool use_qemu_goldfish();
#endif
#endif
#endif /* __TRANSPORT_H */ #endif /* __TRANSPORT_H */

140
adb/transport_local.cpp
View file

@ -229,9 +229,9 @@ static void client_socket_thread(int) {
} }
} }
#else // ADB_HOST #else // !ADB_HOST
static void server_socket_thread(int port) { void server_socket_thread(int port) {
unique_fd serverfd; unique_fd serverfd;
adb_thread_setname("server socket"); adb_thread_setname("server socket");
@ -263,143 +263,19 @@ static void server_socket_thread(int port) {
D("transport: server_socket_thread() exiting"); D("transport: server_socket_thread() exiting");
} }
/* This is relevant only for ADB daemon running inside the emulator. */ #endif
/*
* Redefine open and write for qemu_pipe.h that contains inlined references
* to those routines. We will redefine them back after qemu_pipe.h inclusion.
*/
#undef open
#undef read
#undef write
#define open adb_open
#define read adb_read
#define write adb_write
#include <qemu_pipe.h>
#undef open
#undef read
#undef write
#define open ___xxx_open
#define read ___xxx_read
#define write ___xxx_write
/* A worker thread that monitors host connections, and registers a transport for void local_init(int port) {
* every new host connection. This thread replaces server_socket_thread on
* condition that adbd daemon runs inside the emulator, and emulator uses QEMUD
* pipe to communicate with adbd daemon inside the guest. This is done in order
* to provide more robust communication channel between ADB host and guest. The
* main issue with server_socket_thread approach is that it runs on top of TCP,
* and thus is sensitive to network disruptions. For instance, the
* ConnectionManager may decide to reset all network connections, in which case
* the connection between ADB host and guest will be lost. To make ADB traffic
* independent from the network, we use here 'adb' QEMUD service to transfer data
* between the host, and the guest. See external/qemu/android/adb-*.* that
* implements the emulator's side of the protocol. Another advantage of using
* QEMUD approach is that ADB will be up much sooner, since it doesn't depend
* anymore on network being set up.
* The guest side of the protocol contains the following phases:
* - Connect with adb QEMUD service. In this phase a handle to 'adb' QEMUD service
* is opened, and it becomes clear whether or not emulator supports that
* protocol.
* - Wait for the ADB host to create connection with the guest. This is done by
* sending an 'accept' request to the adb QEMUD service, and waiting on
* response.
* - When new ADB host connection is accepted, the connection with adb QEMUD
* service is registered as the transport, and a 'start' request is sent to the
* adb QEMUD service, indicating that the guest is ready to receive messages.
* Note that the guest will ignore messages sent down from the emulator before
* the transport registration is completed. That's why we need to send the
* 'start' request after the transport is registered.
*/
static void qemu_socket_thread(int port) {
/* 'accept' request to the adb QEMUD service. */
static const char _accept_req[] = "accept";
/* 'start' request to the adb QEMUD service. */
static const char _start_req[] = "start";
/* 'ok' reply from the adb QEMUD service. */
static const char _ok_resp[] = "ok";
char tmp[256];
char con_name[32];
adb_thread_setname("qemu socket");
D("transport: qemu_socket_thread() starting");
/* adb QEMUD service connection request. */
snprintf(con_name, sizeof(con_name), "pipe:qemud:adb:%d", port);
/* Connect to the adb QEMUD service. */
unique_fd fd(qemu_pipe_open(con_name));
if (fd < 0) {
/* This could be an older version of the emulator, that doesn't
* implement adb QEMUD service. Fall back to the old TCP way. */
D("adb service is not available. Falling back to TCP socket.");
std::thread(server_socket_thread, port).detach();
return;
}
while (true) {
/*
* Wait till the host creates a new connection.
*/
/* Send the 'accept' request. */
if (WriteFdExactly(fd.get(), _accept_req, strlen(_accept_req))) {
/* Wait for the response. In the response we expect 'ok' on success,
* or 'ko' on failure. */
if (!ReadFdExactly(fd.get(), tmp, 2) || memcmp(tmp, _ok_resp, 2)) {
D("Accepting ADB host connection has failed.");
} else {
/* Host is connected. Register the transport, and start the
* exchange. */
std::string serial = android::base::StringPrintf("host-%d", fd.get());
WriteFdExactly(fd.get(), _start_req, strlen(_start_req));
register_socket_transport(std::move(fd), std::move(serial), port, 1,
[](atransport*) { return ReconnectResult::Abort; });
}
/* Prepare for accepting of the next ADB host connection. */
fd.reset(qemu_pipe_open(con_name));
if (fd < 0) {
D("adb service become unavailable.");
return;
}
} else {
D("Unable to send the '%s' request to ADB service.", _accept_req);
return;
}
}
D("transport: qemu_socket_thread() exiting");
return;
}
// If adbd is running inside the emulator, it will normally use QEMUD pipe (aka
// goldfish) as the transport. This can either be explicitly set by the
// service.adb.transport property, or be inferred from ro.kernel.qemu that is
// set to "1" for ranchu/goldfish.
static bool use_qemu_goldfish() {
// Legacy way to detect if adbd should use the goldfish pipe is to check for
// ro.kernel.qemu, keep that behaviour for backward compatibility.
if (android::base::GetBoolProperty("ro.kernel.qemu", false)) {
return true;
}
// If service.adb.transport is present and is set to "goldfish", use the
// QEMUD pipe.
if (android::base::GetProperty("service.adb.transport", "") == "goldfish") {
return true;
}
return false;
}
#endif // !ADB_HOST
void local_init(int port)
{
void (*func)(int); void (*func)(int);
const char* debug_name = ""; const char* debug_name = "";
#if ADB_HOST #if ADB_HOST
func = client_socket_thread; func = client_socket_thread;
debug_name = "client"; debug_name = "client";
#elif !defined(__ANDROID__)
// Host adbd.
func = server_socket_thread;
debug_name = "server";
#else #else
// For the adbd daemon in the system image we need to distinguish // For the adbd daemon in the system image we need to distinguish
// between the device, and the emulator. // between the device, and the emulator.