1 /*
2 * Copyright (C) 2019 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 #include "Utils.h"
18
19 #ifdef __BIONIC__
20 #include <cutils/properties.h>
21 #endif // __BIONIC__
22
23 #include <getopt.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <sys/select.h>
27 #include <unistd.h>
28 #include <array>
29 #include <climits>
30 #include <iostream>
31 #include <sstream>
32
33 using std::cerr;
34 using std::endl;
35
36 namespace android {
37 namespace hardware {
38 namespace automotive {
39 namespace vehicle {
40 namespace V2_0 {
41 namespace impl {
42
43 #ifdef __BIONIC__
getServerUri() const44 std::string VirtualizedVhalServerInfo::getServerUri() const {
45 return vsock.str();
46 }
47 #else
48 std::string VirtualizedVhalServerInfo::getServerUri() const {
49 std::stringstream ss;
50
51 ss << "vsock:" << vsock.cid << ":" << vsock.port;
52 return ss.str();
53 }
54 #endif
55
WaitForReadWithTimeout(int fd,struct timeval && timeout)56 bool WaitForReadWithTimeout(int fd, struct timeval&& timeout) {
57 fd_set read_fd_set;
58 FD_ZERO(&read_fd_set);
59 FD_SET(fd, &read_fd_set);
60 auto ready = select(FD_SETSIZE, &read_fd_set, nullptr, nullptr, &timeout);
61
62 if (ready < 0) {
63 cerr << __func__ << ": fd: " << fd << ", errno: " << errno << ", " << strerror(errno)
64 << endl;
65 return false;
66 }
67 return ready > 0;
68 }
69
parseUnsignedIntFromString(const char * optarg,const char * name)70 static std::optional<unsigned> parseUnsignedIntFromString(const char* optarg, const char* name) {
71 auto v = strtoul(optarg, nullptr, 0);
72 if (((v == ULONG_MAX) && (errno == ERANGE)) || (v > UINT_MAX)) {
73 cerr << name << " value is out of range: " << optarg << endl;
74 } else if (v != 0) {
75 return v;
76 } else {
77 cerr << name << " value is invalid or missing: " << optarg << endl;
78 }
79
80 return std::nullopt;
81 }
82
fromCommandLine(int argc,char * argv[],std::string * error)83 std::optional<VirtualizedVhalServerInfo> VirtualizedVhalServerInfo::fromCommandLine(
84 int argc, char* argv[], std::string* error) {
85 // TODO(egranata): move command-line parsing into vsockinfo
86 std::optional<unsigned int> cid;
87 std::optional<unsigned int> port;
88 std::optional<std::string> powerStateMarkerFilePath;
89 std::optional<std::string> powerStateSocketPath;
90
91 // unique values to identify the options
92 constexpr int OPT_VHAL_SERVER_CID = 1001;
93 constexpr int OPT_VHAL_SERVER_PORT_NUMBER = 1002;
94 constexpr int OPT_VHAL_SERVER_POWER_STATE_FILE = 1003;
95 constexpr int OPT_VHAL_SERVER_POWER_STATE_SOCKET = 1004;
96
97 struct option longOptions[] = {
98 {"server_cid", 1, 0, OPT_VHAL_SERVER_CID},
99 {"server_port", 1, 0, OPT_VHAL_SERVER_PORT_NUMBER},
100 {"power_state_file", 1, 0, OPT_VHAL_SERVER_POWER_STATE_FILE},
101 {"power_state_socket", 1, 0, OPT_VHAL_SERVER_POWER_STATE_SOCKET},
102 {},
103 };
104
105 int optValue;
106 while ((optValue = getopt_long_only(argc, argv, ":", longOptions, 0)) != -1) {
107 switch (optValue) {
108 case OPT_VHAL_SERVER_CID:
109 cid = parseUnsignedIntFromString(optarg, "cid");
110 break;
111 case OPT_VHAL_SERVER_PORT_NUMBER:
112 port = parseUnsignedIntFromString(optarg, "port");
113 break;
114 case OPT_VHAL_SERVER_POWER_STATE_FILE:
115 powerStateMarkerFilePath = std::string(optarg);
116 break;
117 case OPT_VHAL_SERVER_POWER_STATE_SOCKET:
118 powerStateSocketPath = std::string(optarg);
119 break;
120 default:
121 // ignore other options
122 break;
123 }
124 }
125
126 if (!cid.has_value() && error) {
127 *error += "Missing server CID. ";
128 }
129 if (!port.has_value() && error) {
130 *error += "Missing server port number. ";
131 }
132 if (!powerStateMarkerFilePath.has_value() && error) {
133 *error += "Missing power state marker file path. ";
134 }
135 if (!powerStateSocketPath.has_value() && error) {
136 *error += "Missing power state socket path. ";
137 }
138
139 if (cid && port && powerStateMarkerFilePath && powerStateSocketPath) {
140 return VirtualizedVhalServerInfo{
141 {*cid, *port}, *powerStateMarkerFilePath, *powerStateSocketPath};
142 }
143 return std::nullopt;
144 }
145
146 #ifdef __BIONIC__
fromRoPropertyStore()147 std::optional<VirtualizedVhalServerInfo> VirtualizedVhalServerInfo::fromRoPropertyStore() {
148 auto vsock = android::hardware::automotive::utils::VsockConnectionInfo::fromRoPropertyStore(
149 {
150 "ro.boot.vendor.vehiclehal.server.cid",
151 "ro.vendor.vehiclehal.server.cid",
152 },
153 {
154 "ro.boot.vendor.vehiclehal.server.port",
155 "ro.vendor.vehiclehal.server.port",
156 });
157
158 if (vsock) {
159 return VirtualizedVhalServerInfo{*vsock, "", ""};
160 }
161 return std::nullopt;
162 }
163 #endif // __BIONIC__
164
165 } // namespace impl
166 } // namespace V2_0
167 } // namespace vehicle
168 } // namespace automotive
169 } // namespace hardware
170 } // namespace android
171