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UdpServer.hpp
#pragma once#include #include #include #include #include #include #include #include #include #include #include #include #include "nocopy.hpp"#include "Log.hpp"#include "Comm.hpp"#include "InetAddr.hpp"#include "ThreadPool.hpp"const static uint16_t defaultport = 8888;const static int defaultfd = -1;const static int defaultsize = 1024;
using task_t = std::function;
class UdpServer : public nocopy {public:UdpServer(uint16_t port = defaultport) : _port(port), _sockfd(defaultfd) {pthread_mutex_init(&_user_mutex, nullptr);}
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::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::GetInstance()->Push(task); } }}private:uint16_t _port;int _sockfd;std::vector _online_user; // 会被多个线程同时访问的pthread_mutex_t _user_mutex;};
引入线程池
InetAddr.hpp
#pragma onceinclude
include
include
include
include
include
class InetAddr {public:InetAddr(struct sockaddr_in& addr) : _addr(addr) {_port = ntohs(_addr.sin_port);_ip = inet_ntoa(_addr.sin_addr);}
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() {}private:std::string _ip;uint16_t _port;struct sockaddr_in _addr;};
在InetAddr中，重载一下==方便对用户是否是同一个进行比较。
UdpClient.hpp
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#includeinclude
include
include
include
include / See NOTES /
include
include
include
include "Thread.hpp"
include "InetAddr.hpp"
void Usage(const std::string& process) {std::cout << "Usage: " << process << " ip port" << std::endl;exit(1);}
void RecverRoutine(void arg) {threaddata td = static_cast<threaddata>(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;}
void SenderRoutine(void arg) {threaddata td = static_cast<threaddata>(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;}
int main(int argc, char* argv[]) {if (argc != 3) {Usage(argv[0]);}
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 recver("recver", RecverRoutine, td);Thread sender("sender", SenderRoutine, td);recver.Start();sender.Start();recver.Join();sender.Join();close(sock);return 0;}
UDP协议支持全双工，一个sockfd，既可以读取，又可以写入，对于客户端和服务端同样如此。多线程客户端，同时读取和写入。测试的时候，使用管道进行演示。
感谢各位大佬支持！！！
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