1 /* 2 * Copyright (C) 2017 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 "common/libs/tcp_socket/tcp_socket.h" 18 19 #include <netinet/in.h> 20 #include <sys/socket.h> 21 #include <sys/types.h> 22 23 #include <cerrno> 24 25 #include <glog/logging.h> 26 27 using cvd::ClientSocket; 28 using cvd::ServerSocket; 29 30 ClientSocket::ClientSocket(int port) 31 : fd_(SharedFD::SocketLocalClient(port, SOCK_STREAM)) {} 32 33 cvd::Message ClientSocket::RecvAny(size_t length) { 34 Message buf(length); 35 auto read_count = fd_->Read(buf.data(), buf.size()); 36 if (read_count < 0) { 37 read_count = 0; 38 } 39 buf.resize(read_count); 40 return buf; 41 } 42 43 bool ClientSocket::closed() const { 44 std::lock_guard<std::mutex> guard(closed_lock_); 45 return other_side_closed_; 46 } 47 48 cvd::Message ClientSocket::Recv(size_t length) { 49 Message buf(length); 50 ssize_t total_read = 0; 51 while (total_read < static_cast<ssize_t>(length)) { 52 auto just_read = fd_->Read(&buf[total_read], buf.size() - total_read); 53 if (just_read <= 0) { 54 if (just_read < 0) { 55 LOG(ERROR) << "read() error: " << strerror(errno); 56 } 57 { 58 std::lock_guard<std::mutex> guard(closed_lock_); 59 other_side_closed_ = true; 60 } 61 return Message{}; 62 } 63 total_read += just_read; 64 } 65 CHECK(total_read == static_cast<ssize_t>(length)); 66 return buf; 67 } 68 69 ssize_t ClientSocket::Send(const uint8_t* data, std::size_t size) { 70 std::lock_guard<std::mutex> lock(send_lock_); 71 ssize_t written{}; 72 while (written < static_cast<ssize_t>(size)) { 73 if (!fd_->IsOpen()) { LOG(ERROR) << "fd_ is closed"; } 74 auto just_written = fd_->Write(data + written, size - written); 75 if (just_written <= 0) { 76 LOG(INFO) << "Couldn't write to client: " << strerror(errno); 77 { 78 std::lock_guard<std::mutex> guard(closed_lock_); 79 other_side_closed_ = true; 80 } 81 return just_written; 82 } 83 written += just_written; 84 } 85 return written; 86 } 87 88 ssize_t ClientSocket::Send(const Message& message) { 89 return Send(&message[0], message.size()); 90 } 91 92 ServerSocket::ServerSocket(int port) 93 : fd_{SharedFD::SocketLocalServer(port, SOCK_STREAM)} { 94 if (!fd_->IsOpen()) { 95 LOG(FATAL) << "Couldn't open streaming server on port " << port; 96 } 97 } 98 99 ClientSocket ServerSocket::Accept() { 100 SharedFD client = SharedFD::Accept(*fd_); 101 if (!client->IsOpen()) { 102 LOG(FATAL) << "Error attemping to accept: " << strerror(errno); 103 } 104 return ClientSocket{client}; 105 } 106
