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 #pragma once 18 19 #include <https/RunLoop.h> 20 21 #include <sys/socket.h> 22 #include "common/libs/fs/vm_sockets.h" 23 24 #include <memory> 25 26 struct HostToGuestComms : std::enable_shared_from_this<HostToGuestComms> { 27 using ReceiveCb = std::function<void(const void *data, size_t size)>; 28 29 explicit HostToGuestComms( 30 std::shared_ptr<RunLoop> runLoop, 31 bool isServer, 32 uint32_t cid, 33 uint16_t port, 34 ReceiveCb onReceive); 35 36 explicit HostToGuestComms( 37 std::shared_ptr<RunLoop> runLoop, 38 bool isServer, 39 int fd, 40 ReceiveCb onReceive); 41 42 ~HostToGuestComms(); 43 44 void start(); 45 46 void send(const void *data, size_t size, bool addFraming = true); 47 48 private: 49 std::shared_ptr<RunLoop> mRunLoop; 50 bool mIsServer; 51 ReceiveCb mOnReceive; 52 53 int mServerSock; 54 int mSock; 55 sockaddr_vm mConnectToAddr; 56 57 std::vector<uint8_t> mInBuffer; 58 size_t mInBufferLen; 59 60 std::mutex mLock; 61 std::vector<uint8_t> mOutBuffer; 62 bool mSendPending; 63 64 bool mConnected; 65 66 void onServerConnection(); 67 void onSocketReceive(); 68 void onSocketSend(); 69 void drainInBuffer(); 70 71 void onAttemptToConnect(const sockaddr_vm &addr); 72 void onCheckConnection(const sockaddr_vm &addr); 73 void onConnected(); 74 }; 75 76