1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "minadbd_services.h"
#include <errno.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <functional>
#include <memory>
#include <string>
#include <string_view>
#include <thread>
#include <unordered_set>
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/memory.h>
#include <android-base/parseint.h>
#include <android-base/properties.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include "adb.h"
#include "adb_unique_fd.h"
#include "adb_utils.h"
#include "fdevent.h"
#include "fuse_adb_provider.h"
#include "fuse_sideload.h"
#include "minadbd_types.h"
#include "services.h"
#include "sysdeps.h"
static int minadbd_socket = -1;
static bool rescue_mode = false;
static std::string sideload_mount_point = FUSE_SIDELOAD_HOST_MOUNTPOINT;
void SetMinadbdSocketFd(int socket_fd) {
minadbd_socket = socket_fd;
}
void SetMinadbdRescueMode(bool rescue) {
rescue_mode = rescue;
}
void SetSideloadMountPoint(const std::string& path) {
sideload_mount_point = path;
}
static bool WriteCommandToFd(MinadbdCommands cmd, int fd) {
char message[kMinadbdMessageSize];
memcpy(message, kMinadbdCommandPrefix, strlen(kMinadbdStatusPrefix));
android::base::put_unaligned(message + strlen(kMinadbdStatusPrefix), cmd);
if (!android::base::WriteFully(fd, message, kMinadbdMessageSize)) {
PLOG(ERROR) << "Failed to write message " << message;
return false;
}
return true;
}
// Blocks and reads the command status from |fd|. Returns false if the received message has a
// format error.
static bool WaitForCommandStatus(int fd, MinadbdCommandStatus* status) {
char buffer[kMinadbdMessageSize];
if (!android::base::ReadFully(fd, buffer, kMinadbdMessageSize)) {
PLOG(ERROR) << "Failed to response status from socket";
exit(kMinadbdSocketIOError);
}
std::string message(buffer, buffer + kMinadbdMessageSize);
if (!android::base::StartsWith(message, kMinadbdStatusPrefix)) {
LOG(ERROR) << "Failed to parse status in " << message;
return false;
}
*status = android::base::get_unaligned<MinadbdCommandStatus>(
message.substr(strlen(kMinadbdStatusPrefix)).c_str());
return true;
}
static MinadbdErrorCode RunAdbFuseSideload(int sfd, const std::string& args,
MinadbdCommandStatus* status) {
auto pieces = android::base::Split(args, ":");
int64_t file_size;
int block_size;
if (pieces.size() != 2 || !android::base::ParseInt(pieces[0], &file_size) || file_size <= 0 ||
!android::base::ParseInt(pieces[1], &block_size) || block_size <= 0) {
LOG(ERROR) << "bad sideload-host arguments: " << args;
return kMinadbdPackageSizeError;
}
LOG(INFO) << "sideload-host file size " << file_size << ", block size " << block_size;
if (!WriteCommandToFd(MinadbdCommands::kInstall, minadbd_socket)) {
return kMinadbdSocketIOError;
}
auto adb_data_reader = std::make_unique<FuseAdbDataProvider>(sfd, file_size, block_size);
if (int result = run_fuse_sideload(std::move(adb_data_reader), sideload_mount_point.c_str());
result != 0) {
LOG(ERROR) << "Failed to start fuse";
return kMinadbdFuseStartError;
}
if (!WaitForCommandStatus(minadbd_socket, status)) {
return kMinadbdMessageFormatError;
}
// Signal host-side adb to stop. For sideload mode, we always send kSideloadServiceExitSuccess
// (i.e. "DONEDONE") regardless of the install result. For rescue mode, we send failure message on
// install error.
if (!rescue_mode || *status == MinadbdCommandStatus::kSuccess) {
if (!android::base::WriteFully(sfd, kSideloadServiceExitSuccess,
strlen(kSideloadServiceExitSuccess))) {
return kMinadbdHostSocketIOError;
}
} else {
if (!android::base::WriteFully(sfd, kSideloadServiceExitFailure,
strlen(kSideloadServiceExitFailure))) {
return kMinadbdHostSocketIOError;
}
}
return kMinadbdSuccess;
}
// Sideload service always exits after serving an install command.
static void SideloadHostService(unique_fd sfd, const std::string& args) {
MinadbdCommandStatus status;
exit(RunAdbFuseSideload(sfd.get(), args, &status));
}
// Rescue service waits for the next command after an install command.
static void RescueInstallHostService(unique_fd sfd, const std::string& args) {
MinadbdCommandStatus status;
if (auto result = RunAdbFuseSideload(sfd.get(), args, &status); result != kMinadbdSuccess) {
exit(result);
}
}
static void RescueGetpropHostService(unique_fd sfd, const std::string& prop) {
static const std::unordered_set<std::string> kGetpropAllowedProps = {
"ro.build.fingerprint",
"ro.build.date.utc",
};
auto allowed = kGetpropAllowedProps.find(prop) != kGetpropAllowedProps.end();
if (!allowed) {
return;
}
auto result = android::base::GetProperty(prop, "");
if (result.empty()) {
return;
}
if (!android::base::WriteFully(sfd, result.data(), result.size())) {
exit(kMinadbdHostSocketIOError);
}
}
unique_fd daemon_service_to_fd(std::string_view name, atransport* /* transport */) {
if (rescue_mode) {
if (ConsumePrefix(&name, "rescue-install:")) {
// rescue-install:<file-size>:<block-size>
std::string args(name);
return create_service_thread(
"rescue-install", std::bind(RescueInstallHostService, std::placeholders::_1, args));
} else if (ConsumePrefix(&name, "rescue-getprop:")) {
// rescue-getprop:<prop>
std::string args(name);
return create_service_thread(
"rescue-getprop", std::bind(RescueGetpropHostService, std::placeholders::_1, args));
}
return unique_fd{};
}
if (name.starts_with("sideload:")) {
// This exit status causes recovery to print a special error message saying to use a newer adb
// (that supports sideload-host).
exit(kMinadbdAdbVersionError);
} else if (ConsumePrefix(&name, "sideload-host:")) {
// sideload-host:<file-size>:<block-size>
std::string args(name);
return create_service_thread("sideload-host",
std::bind(SideloadHostService, std::placeholders::_1, args));
}
return unique_fd{};
}
|
