1 /*
2 * Copyright 2016 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 LOG_TAG "VtsDriverCommUtil"
18
19 #include "VtsDriverCommUtil.h"
20
21 #include <errno.h>
22 #include <netdb.h>
23 #include <netinet/in.h>
24 #include <sys/socket.h>
25 #include <sys/un.h>
26 #include <sstream>
27
28 #include <android-base/logging.h>
29
30 #include "test/vts/proto/VtsDriverControlMessage.pb.h"
31
32 using namespace std;
33
34 #define MAX_HEADER_BUFFER_SIZE 128
35
36 namespace android {
37 namespace vts {
38
Connect(const string & socket_name)39 bool VtsDriverCommUtil::Connect(const string& socket_name) {
40 struct sockaddr_un serv_addr;
41 struct hostent* server;
42
43 LOG(DEBUG) << "Connect socket: " << socket_name;
44 sockfd_ = socket(PF_UNIX, SOCK_STREAM, 0);
45 if (sockfd_ < 0) {
46 LOG(ERROR) << "ERROR opening socket.";
47 return false;
48 }
49
50 server = gethostbyname("127.0.0.1");
51 if (server == NULL) {
52 LOG(ERROR) << "ERROR can't resolve the host name, 127.0.0.1";
53 return false;
54 }
55
56 bzero((char*)&serv_addr, sizeof(serv_addr));
57 serv_addr.sun_family = AF_UNIX;
58 strcpy(serv_addr.sun_path, socket_name.c_str());
59
60 if (connect(sockfd_, (struct sockaddr*)&serv_addr, sizeof(serv_addr)) < 0) {
61 LOG(ERROR) << "ERROR connecting to " << socket_name << " errno = " << errno
62 << " " << strerror(errno);
63 sockfd_ = -1;
64 return false;
65 }
66 return true;
67 }
68
Close()69 int VtsDriverCommUtil::Close() {
70 int result = 0;
71 if (sockfd_ != -1) {
72 result = close(sockfd_);
73 if (result != 0) {
74 LOG(ERROR) << "ERROR closing socket (errno = " << errno << ")";
75 }
76
77 sockfd_ = -1;
78 }
79
80 return result;
81 }
82
VtsSocketSendBytes(const string & message)83 bool VtsDriverCommUtil::VtsSocketSendBytes(const string& message) {
84 if (sockfd_ == -1) {
85 LOG(ERROR) << "ERROR sockfd not set.";
86 return false;
87 }
88 stringstream header;
89 header << message.length() << "\n";
90 LOG(DEBUG) << "[agent->driver] len = " << message.length();
91 int n = write(sockfd_, header.str().c_str(), header.str().length());
92 if (n < 0) {
93 LOG(ERROR) << " ERROR writing to socket.";
94 return false;
95 }
96
97 int bytes_sent = 0;
98 int msg_len = message.length();
99 while (bytes_sent < msg_len) {
100 n = write(sockfd_, &message.c_str()[bytes_sent], msg_len - bytes_sent);
101 if (n <= 0) {
102 LOG(ERROR) << "ERROR writing to socket.";
103 return false;
104 }
105 bytes_sent += n;
106 }
107 return true;
108 }
109
VtsSocketRecvBytes()110 string VtsDriverCommUtil::VtsSocketRecvBytes() {
111 if (sockfd_ == -1) {
112 LOG(ERROR) << "ERROR sockfd not set.";
113 return string();
114 }
115
116 int header_index = 0;
117 char header_buffer[MAX_HEADER_BUFFER_SIZE];
118
119 for (header_index = 0; header_index < MAX_HEADER_BUFFER_SIZE;
120 header_index++) {
121 int ret = read(sockfd_, &header_buffer[header_index], 1);
122 if (ret != 1) {
123 int errno_save = errno;
124 LOG(DEBUG) << "ERROR reading the length ret = " << ret
125 << " sockfd = " << sockfd_ << " "
126 << " errno = " << errno_save << " " << strerror(errno_save);
127 return string();
128 }
129 if (header_buffer[header_index] == '\n' ||
130 header_buffer[header_index] == '\r') {
131 header_buffer[header_index] = '\0';
132 break;
133 }
134 }
135
136 int msg_len = atoi(header_buffer);
137 char* msg = (char*)malloc(msg_len + 1);
138 if (!msg) {
139 LOG(ERROR) << "ERROR malloc failed.";
140 return string();
141 }
142
143 int bytes_read = 0;
144 while (bytes_read < msg_len) {
145 int result = read(sockfd_, &msg[bytes_read], msg_len - bytes_read);
146 if (result <= 0) {
147 LOG(ERROR) << "ERROR read failed.";
148 return string();
149 }
150 bytes_read += result;
151 }
152 msg[msg_len] = '\0';
153 return string(msg, msg_len);
154 }
155
VtsSocketSendMessage(const google::protobuf::Message & message)156 bool VtsDriverCommUtil::VtsSocketSendMessage(
157 const google::protobuf::Message& message) {
158 if (sockfd_ == -1) {
159 LOG(ERROR) << "ERROR sockfd not set.";
160 return false;
161 }
162
163 string message_string;
164 if (!message.SerializeToString(&message_string)) {
165 LOG(ERROR) << "ERROR can't serialize the message to a string.";
166 return false;
167 }
168 return VtsSocketSendBytes(message_string);
169 }
170
VtsSocketRecvMessage(google::protobuf::Message * message)171 bool VtsDriverCommUtil::VtsSocketRecvMessage(
172 google::protobuf::Message* message) {
173 if (sockfd_ == -1) {
174 LOG(ERROR) << "ERROR sockfd not set.";
175 return false;
176 }
177
178 string message_string = VtsSocketRecvBytes();
179 if (message_string.length() == 0) {
180 LOG(DEBUG) << "ERROR message string zero length.";
181 return false;
182 }
183
184 return message->ParseFromString(message_string);
185 }
186
187 } // namespace vts
188 } // namespace android
189