227 lines
8.5 KiB
C++
Executable file
227 lines
8.5 KiB
C++
Executable file
// Copyright (c) 2012-2014, The CryptoNote developers, The Bytecoin developers
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//
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// This file is part of Bytecoin.
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//
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// Bytecoin is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Bytecoin is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with Bytecoin. If not, see <http://www.gnu.org/licenses/>.
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#include "TcpListener.h"
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#include <cassert>
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#include <iostream>
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#define WIN32_LEAN_AND_MEAN
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#include <winsock2.h>
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#include <mswsock.h>
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#include "InterruptedException.h"
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#include "Dispatcher.h"
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#include "TcpConnection.h"
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using namespace System;
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namespace {
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struct Context : public OVERLAPPED {
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void* context;
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bool interrupted;
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};
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LPFN_ACCEPTEX acceptEx = nullptr;
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LPFN_GETACCEPTEXSOCKADDRS getAcceptExSockaddrs = nullptr;
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}
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TcpListener::TcpListener() : dispatcher(nullptr) {
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}
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TcpListener::TcpListener(Dispatcher& dispatcher, const std::string& address, uint16_t port) : dispatcher(&dispatcher) {
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listener = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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if (listener == INVALID_SOCKET) {
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std::cerr << "socket failed, result=" << WSAGetLastError() << '.' << std::endl;
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} else {
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sockaddr_in address;
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address.sin_family = AF_INET;
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address.sin_port = htons(port);
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address.sin_addr.s_addr = INADDR_ANY;
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if (bind(listener, reinterpret_cast<sockaddr*>(&address), sizeof address) != 0) {
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std::cerr << "bind failed, result=" << WSAGetLastError() << '.' << std::endl;
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} else if (listen(listener, SOMAXCONN) != 0) {
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std::cerr << "listen failed, result=" << WSAGetLastError() << '.' << std::endl;
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} else {
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GUID guidAcceptEx = WSAID_ACCEPTEX;
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DWORD read = sizeof acceptEx;
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if (acceptEx == nullptr && WSAIoctl(listener, SIO_GET_EXTENSION_FUNCTION_POINTER, &guidAcceptEx, sizeof guidAcceptEx, &acceptEx, sizeof acceptEx, &read, NULL, NULL) != 0) {
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std::cerr << "WSAIoctl failed, result=" << WSAGetLastError() << '.' << std::endl;
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} else {
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assert(read == sizeof acceptEx);
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GUID guidGetAcceptExSockaddrs = WSAID_GETACCEPTEXSOCKADDRS;
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read = sizeof getAcceptExSockaddrs;
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if (getAcceptExSockaddrs == nullptr && WSAIoctl(listener, SIO_GET_EXTENSION_FUNCTION_POINTER, &guidGetAcceptExSockaddrs, sizeof guidGetAcceptExSockaddrs, &getAcceptExSockaddrs, sizeof getAcceptExSockaddrs, &read, NULL, NULL) != 0) {
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std::cerr << "WSAIoctl failed, result=" << WSAGetLastError() << '.' << std::endl;
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} else {
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assert(read == sizeof getAcceptExSockaddrs);
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if (CreateIoCompletionPort(reinterpret_cast<HANDLE>(listener), dispatcher.getCompletionPort(), 0, 0) != dispatcher.getCompletionPort()) {
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std::cerr << "CreateIoCompletionPort failed, result=" << GetLastError() << '.' << std::endl;
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} else {
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stopped = false;
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context = nullptr;
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return;
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}
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}
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}
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}
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if (closesocket(listener) != 0) {
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std::cerr << "closesocket failed, result=" << WSAGetLastError() << '.' << std::endl;
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}
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}
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throw std::runtime_error("TcpListener::TcpListener");
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}
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TcpListener::TcpListener(TcpListener&& other) : dispatcher(other.dispatcher) {
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if (other.dispatcher != nullptr) {
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listener = other.listener;
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stopped = other.stopped;
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context = other.context;
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other.dispatcher = nullptr;
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}
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}
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TcpListener::~TcpListener() {
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if (dispatcher != nullptr) {
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assert(context == nullptr);
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if (closesocket(listener) != 0) {
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std::cerr << "closesocket failed, result=" << WSAGetLastError() << '.' << std::endl;
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}
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}
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}
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TcpListener& TcpListener::operator=(TcpListener&& other) {
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if (dispatcher != nullptr) {
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assert(context == nullptr);
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if (closesocket(listener) != 0) {
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std::cerr << "closesocket failed, result=" << WSAGetLastError() << '.' << std::endl;
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throw std::runtime_error("TcpListener::operator=");
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}
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}
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dispatcher = other.dispatcher;
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if (other.dispatcher != nullptr) {
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listener = other.listener;
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stopped = other.stopped;
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context = other.context;
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other.dispatcher = nullptr;
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}
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return *this;
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}
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void TcpListener::start() {
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assert(dispatcher != nullptr);
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assert(stopped);
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stopped = false;
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}
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void TcpListener::stop() {
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assert(dispatcher != nullptr);
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assert(!stopped);
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if (context != nullptr) {
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Context* context2 = static_cast<Context*>(context);
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if (!context2->interrupted) {
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if (CancelIoEx(reinterpret_cast<HANDLE>(listener), context2) != TRUE) {
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std::cerr << "CancelIoEx failed, result=" << GetLastError() << '.' << std::endl;
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throw std::runtime_error("TcpListener::stop");
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}
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context2->interrupted = true;
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}
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}
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stopped = true;
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}
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TcpConnection TcpListener::accept() {
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assert(dispatcher != nullptr);
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assert(context == nullptr);
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if (stopped) {
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throw InterruptedException();
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}
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SOCKET connection = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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if (connection == INVALID_SOCKET) {
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std::cerr << "socket failed, result=" << WSAGetLastError() << '.' << std::endl;
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} else {
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uint8_t addresses[sizeof sockaddr_in * 2 + 32];
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DWORD received;
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Context context2;
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context2.hEvent = NULL;
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if (acceptEx(listener, connection, addresses, 0, sizeof(sockaddr_in) + 16, sizeof(sockaddr_in) + 16, &received, &context2) == TRUE) {
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std::cerr << "AcceptEx returned immediately, which is not supported." << std::endl;
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} else {
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int lastError = WSAGetLastError();
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if (lastError != WSA_IO_PENDING) {
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std::cerr << "AcceptEx failed, result=" << lastError << '.' << std::endl;
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} else {
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context2.context = GetCurrentFiber();
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context2.interrupted = false;
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context = &context2;
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dispatcher->yield();
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assert(dispatcher != nullptr);
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assert(context2.context == GetCurrentFiber());
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assert(context == &context2);
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context = nullptr;
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DWORD transferred;
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DWORD flags;
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if (WSAGetOverlappedResult(listener, &context2, &transferred, FALSE, &flags) != TRUE) {
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lastError = WSAGetLastError();
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if (lastError == ERROR_OPERATION_ABORTED) {
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assert(context2.interrupted);
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if (closesocket(connection) != 0) {
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std::cerr << "closesocket failed, result=" << WSAGetLastError() << '.' << std::endl;
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}
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throw InterruptedException();
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}
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std::cerr << "AcceptEx failed, result=" << lastError << '.' << std::endl;
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} else {
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assert(transferred == 0);
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assert(flags == 0);
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if (setsockopt(connection, SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT, reinterpret_cast<char*>(&listener), sizeof listener) != 0) {
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std::cerr << "setsockopt failed, result=" << WSAGetLastError() << '.' << std::endl;
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} else {
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if (CreateIoCompletionPort(reinterpret_cast<HANDLE>(connection), dispatcher->getCompletionPort(), 0, 0) != dispatcher->getCompletionPort()) {
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std::cerr << "CreateIoCompletionPort failed, result=" << GetLastError() << '.' << std::endl;
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} else {
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//sockaddr_in* local;
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//int localSize;
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//sockaddr_in* remote;
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//int remoteSize;
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//static_cast<LPFN_GETACCEPTEXSOCKADDRS>(getAcceptExSockaddrs)(addresses, 0, sizeof(sockaddr_in) + 16, sizeof(sockaddr_in) + 16, reinterpret_cast<sockaddr**>(&local), &localSize, reinterpret_cast<sockaddr**>(&remote), &remoteSize);
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//assert(localSize == sizeof sockaddr_in);
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//assert(remoteSize == sizeof sockaddr_in);
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//std::cout << "Client connected from " << static_cast<unsigned int>(remote->sin_addr.S_un.S_un_b.s_b1) << '.' << static_cast<unsigned int>(remote->sin_addr.S_un.S_un_b.s_b2) << '.' << static_cast<unsigned int>(remote->sin_addr.S_un.S_un_b.s_b3) << '.' << static_cast<unsigned int>(remote->sin_addr.S_un.S_un_b.s_b4) << ':' << remote->sin_port << std::endl;
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return TcpConnection(*dispatcher, connection);
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}
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}
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}
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}
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}
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if (closesocket(connection) != 0) {
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std::cerr << "closesocket failed, result=" << WSAGetLastError() << '.' << std::endl;
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}
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}
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throw std::runtime_error("TcpListener::accept");
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}
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