【在Linux世界中追寻伟大的One Piece】Socket编程UDP(续)

#pragma once #include <iostream> #include <string> #include <cerrno> #include <cstring> #include <unistd.h> #include <strings.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <functional> #include <pthread.h> #include "nocopy.hpp" #include "Log.hpp" #include "Comm.hpp" #include "InetAddr.hpp" #include "ThreadPool.hpp" <p>const static uint16_t defaultport = 8888; const static int defaultfd = -1; const static int defaultsize = 1024;</p><p>using task_t = std::function<void()>;</p><p>class UdpServer : public nocopy { public: UdpServer(uint16_t port = defaultport) : _port(port), _sockfd(defaultfd) { pthread_mutex_init(&_user_mutex, nullptr); }</p><pre class="brush:php;toolbar:false">void Init() {     // 1. 创建 socket，就是创建了文件描述符     _sockfd = socket(AF_INET, SOCK_DGRAM, 0);     if (_sockfd < 0) {         lg.LogMessage(Error, "socket error: %sn", strerror(errno));         return;     }      // 2. 绑定     struct sockaddr_in addr;     memset(&addr, 0, sizeof(addr));     addr.sin_family = AF_INET;     addr.sin_port = htons(_port);     addr.sin_addr.s_addr = htonl(INADDR_ANY);      if (bind(_sockfd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {         lg.LogMessage(Error, "bind error: %sn", strerror(errno));         close(_sockfd);         return;     }      // 3. 初始化线程池     ThreadPool<task_t>::GetInstance()->Start(); }  void AddOnlineUser(InetAddr addr) {     LockGuard lockguard(&_user_mutex);     for (auto& user : _online_user) {         if (addr == user) return;     }     _online_user.push_back(addr);     lg.LogMessage(Debug, "%s:%d is add to online user list...n", addr.Ip().c_str(), addr.Port()); }  void Route(int sock, const std::string& message) {     LockGuard lockguard(&_user_mutex);     for (auto& user : _online_user) {         sendto(sock, message.c_str(), message.size(), 0, (struct sockaddr*)&user.GetAddr(), sizeof(user.GetAddr()));         lg.LogMessage(Debug, "server send message to %s:%d, message: %sn", user.Ip().c_str(), user.Port(), message.c_str());     } }  void Start() {     // 服务器永远不退出     char buffer[defaultsize];     for (;;) {         struct sockaddr_in peer;         socklen_t len = sizeof(peer); // 不能乱写         ssize_t n = recvfrom(_sockfd, buffer, sizeof(buffer) - 1, 0, (struct sockaddr*)&peer, &len);         if (n > 0) {             InetAddr addr(peer);             AddOnlineUser(addr);             buffer[n] = 0;             std::string message = "[";             message += addr.Ip();             message += ":";             message += std::to_string(addr.Port());             message += "]# ";             message += buffer;             task_t task = std::bind(&UdpServer::Route, this, _sockfd, message);             ThreadPool<task_t>::GetInstance()->Push(task);         }     } }

#pragma once</p><h1>include <iostream></h1><h1>include <string></h1><h1>include <sys/types.h></h1><h1>include <sys/socket.h></h1><h1>include <netinet/in.h></h1><h1>include <arpa/inet.h></h1><p>class InetAddr { public: InetAddr(struct sockaddr_in& addr) : _addr(addr) { _port = ntohs(_addr.sin_port); _ip = inet_ntoa(_addr.sin_addr); }</p><pre class="brush:php;toolbar:false">std::string Ip() { return _ip; } uint16_t Port() { return _port; }  std::string PrintDebug() {     std::string info = _ip;     info += ":";     info += std::to_string(_port); // "127.0.0.1:4444"     return info; }  const struct sockaddr_in& GetAddr() {     return _addr; }  bool operator == (const InetAddr& addr) {     return this->_ip == addr._ip && this->_port == addr._port; }  ~InetAddr() {}

#include <iostream></p><h1>include <cerrno></h1><h1>include <cstring></h1><h1>include <string></h1><h1>include <unistd.h></h1><h1>include <sys/types.h> /<em> See NOTES </em>/</h1><h1>include <sys/socket.h></h1><h1>include <arpa/inet.h></h1><h1>include <netinet/in.h></h1><h1>include "Thread.hpp"</h1><h1>include "InetAddr.hpp"</h1><p>void Usage(const std::string& process) { std::cout << "Usage: " << process << " ip port" << std::endl; exit(1); }</p><p>void<em> RecverRoutine(void</em> arg) { threaddata<em> td = static_cast<threaddata</em>>(arg); int sock = td->sockfd; char buffer[1024]; for (;;) { struct sockaddr_in peer; socklen_t len = sizeof(peer); ssize_t n = recvfrom(sock, buffer, sizeof(buffer) - 1, 0, (struct sockaddr*)&peer, &len); if (n > 0) { buffer[n] = 0; std::cerr << "recv: " << buffer << std::endl; } } return nullptr; }</p><p>void<em> SenderRoutine(void</em> arg) { threaddata<em> td = static_cast<threaddata</em>>(arg); int sock = td->sockfd; struct sockaddr_in peer = td->peer; char buffer[1024]; for (;;) { std::cin.getline(buffer, sizeof(buffer)); sendto(sock, buffer, strlen(buffer), 0, (struct sockaddr*)&peer, sizeof(peer)); } return nullptr; }</p><p>int main(int argc, char* argv[]) { if (argc != 3) { Usage(argv[0]); }</p><pre class="brush:php;toolbar:false">int sock = socket(AF_INET, SOCK_DGRAM, 0); if (sock < 0) {     std::cerr << "socket error: " << strerror(errno) << std::endl;     exit(2); }  struct sockaddr_in peer; memset(&peer, 0, sizeof(peer)); peer.sin_family = AF_INET; peer.sin_port = htons(atoi(argv[2])); peer.sin_addr.s_addr = inet_addr(argv[1]);  threaddata td; td.sockfd = sock; td.peer = peer;  Thread<threaddata> recver("recver", RecverRoutine, td); Thread<threaddata> sender("sender", SenderRoutine, td); recver.Start(); sender.Start(); recver.Join(); sender.Join(); close(sock); return 0;