102 lines
4.1 KiB
C++
102 lines
4.1 KiB
C++
#include "multiplex_manager.h"
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#include "nanoid/nanoid.h"
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#include <iostream>
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#include <cstring>
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MultiplexManager::MultiplexManager(ISteamNetworkingSockets* steamInterface, HSteamNetConnection steamConn,
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boost::asio::io_context& io_context, bool& isHost, int& localPort)
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: steamInterface_(steamInterface), steamConn_(steamConn),
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io_context_(io_context), isHost_(isHost), localPort_(localPort) {}
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MultiplexManager::~MultiplexManager() {
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// Close all sockets
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std::lock_guard<std::mutex> lock(mapMutex_);
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for (auto& pair : clientMap_) {
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pair.second->close();
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}
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clientMap_.clear();
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}
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std::string MultiplexManager::addClient(std::shared_ptr<tcp::socket> socket) {
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std::lock_guard<std::mutex> lock(mapMutex_);
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std::string id = nanoid::generate(6);
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clientMap_[id] = socket;
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return id;
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}
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void MultiplexManager::removeClient(const std::string& id) {
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std::lock_guard<std::mutex> lock(mapMutex_);
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auto it = clientMap_.find(id);
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if (it != clientMap_.end()) {
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it->second->close();
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clientMap_.erase(it);
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}
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}
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std::shared_ptr<tcp::socket> MultiplexManager::getClient(const std::string& id) {
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std::lock_guard<std::mutex> lock(mapMutex_);
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auto it = clientMap_.find(id);
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if (it != clientMap_.end()) {
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return it->second;
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}
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return nullptr;
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}
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void MultiplexManager::sendTunnelPacket(const std::string& id, const char* data, size_t len, int type) {
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// Packet format: string id (6 chars + null), uint32_t type, then data if type==0
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size_t idLen = id.size() + 1; // include null terminator
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size_t packetSize = idLen + sizeof(uint32_t) + (type == 0 ? len : 0);
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std::vector<char> packet(packetSize);
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std::memcpy(&packet[0], id.c_str(), idLen);
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uint32_t* pType = reinterpret_cast<uint32_t*>(&packet[idLen]);
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*pType = type;
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if (type == 0 && data) {
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std::memcpy(&packet[idLen + sizeof(uint32_t)], data, len);
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}
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steamInterface_->SendMessageToConnection(steamConn_, packet.data(), packet.size(), k_nSteamNetworkingSend_Reliable, nullptr);
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}
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void MultiplexManager::handleTunnelPacket(const char* data, size_t len) {
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size_t idLen = 7; // 6 + null
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if (len < idLen + sizeof(uint32_t)) {
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std::cerr << "Invalid tunnel packet size" << std::endl;
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return;
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}
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std::string id(data, 6);
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uint32_t type = *reinterpret_cast<const uint32_t*>(data + idLen);
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if (type == 0) {
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// Data packet
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size_t dataLen = len - idLen - sizeof(uint32_t);
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const char* packetData = data + idLen + sizeof(uint32_t);
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auto socket = getClient(id);
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if (!socket && isHost_ && localPort_ > 0) {
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// 如果是主持且没有对应的 TCP Client，创建一个连接到本地端口
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std::cout << "Creating new TCP client for id " << id << " connecting to localhost:" << localPort_ << std::endl;
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try {
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auto newSocket = std::make_shared<tcp::socket>(io_context_);
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tcp::resolver resolver(io_context_);
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auto endpoints = resolver.resolve("127.0.0.1", std::to_string(localPort_));
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boost::asio::connect(*newSocket, endpoints);
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std::lock_guard<std::mutex> lock(mapMutex_);
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clientMap_[id] = newSocket;
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socket = newSocket;
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std::cout << "Successfully created TCP client for id " << id << std::endl;
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} catch (const std::exception& e) {
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std::cerr << "Failed to create TCP client for id " << id << ": " << e.what() << std::endl;
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return;
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}
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}
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if (socket) {
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boost::asio::async_write(*socket, boost::asio::buffer(packetData, dataLen), [](const boost::system::error_code&, std::size_t) {});
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} else {
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std::cerr << "No client found for id " << id << std::endl;
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}
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} else if (type == 1) {
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// Disconnect packet
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removeClient(id);
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std::cout << "Client " << id << " disconnected" << std::endl;
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} else {
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std::cerr << "Unknown packet type " << type << std::endl;
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}
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} |