1 /*
2 * Copyright (C) 2023 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 <string>
18
19 #include <android-base/logging.h>
20 #include <gflags/gflags.h>
21
22 #include "common/libs/fs/shared_buf.h"
23 #include "common/libs/fs/shared_fd.h"
24 #include "host/commands/cvd_update_security_algorithm/update_security_algorithm_command_builder.h"
25 #include "host/libs/config/cuttlefish_config.h"
26
27 DEFINE_int32(instance_num, cuttlefish::GetInstance(),
28 "Which instance to read the configs from");
29 DEFINE_int32(modem_num, 0, "Which modem to send command to");
30 DEFINE_int32(connection_event, 0,
31 "The type if connection event. See "
32 "android.hardware.radio.network.ConnectionEvent");
33 DEFINE_int32(encryption, 0,
34 "The encryption algorithm being used. See "
35 "android.hardware.radio.network.SecurityAlgorithm");
36 DEFINE_int32(integrity, 0,
37 "The integrity algorithm being used. See "
38 "android.hardware.radio.network.SecurityAlgorithm");
39 DEFINE_bool(is_unprotected_emergency, false,
40 "Whether the connection event is associated with an unprotected"
41 "emergency session");
42
43 namespace cuttlefish {
44 namespace {
45
UpdateSecurityAlgorithm(SharedFD fd)46 void UpdateSecurityAlgorithm(SharedFD fd) {
47 std::string command = fmt::format(
48 "REM{}{}", FLAGS_modem_num,
49 GetATCommand(FLAGS_connection_event, FLAGS_encryption, FLAGS_integrity,
50 FLAGS_is_unprotected_emergency));
51
52 LOG(DEBUG) << "Attempting to send command: " << command;
53
54 long written = WriteAll(fd, command);
55 if (written != command.size()) {
56 LOG(FATAL) << "Failed to write data to shared fd. Tried to write "
57 << command.size() << " bytes, but only wrote " << written
58 << " bytes.";
59 }
60 }
61
UpdateSecurityAlgorithmMain(int argc,char ** argv)62 int UpdateSecurityAlgorithmMain(int argc, char **argv) {
63 ::android::base::InitLogging(argv, android::base::StderrLogger);
64 google::ParseCommandLineFlags(&argc, &argv, true);
65
66 auto config = CuttlefishConfig::Get();
67 if (!config) {
68 LOG(FATAL) << "Failed to obtain config object";
69 }
70
71 auto cf_config = config->ForInstance(FLAGS_instance_num);
72 std::string socket_name =
73 fmt::format("modem_simulator{}", cf_config.modem_simulator_host_id());
74
75 LOG(INFO) << "Connecting over local socket: " << socket_name;
76 SharedFD modem_simulator_fd =
77 cuttlefish::SharedFD::SocketLocalClient(socket_name, true, SOCK_STREAM);
78
79 UpdateSecurityAlgorithm(modem_simulator_fd);
80
81 return 0;
82 }
83
84 } // namespace
85 } // namespace cuttlefish
86
main(int argc,char ** argv)87 int main(int argc, char **argv) {
88 return cuttlefish::UpdateSecurityAlgorithmMain(argc, argv);
89 }
90