{"id":26167,"date":"2025-04-19T14:43:35","date_gmt":"2025-04-19T06:43:35","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/26167.html"},"modified":"2025-04-19T14:43:35","modified_gmt":"2025-04-19T06:43:35","slug":"%e3%80%90%e7%bd%91%e7%bb%9c%e7%bc%96%e7%a8%8b%e3%80%91%e6%90%ad%e5%bb%ba%e4%b8%80%e4%b8%aa%e7%ae%80%e5%8d%95%e7%9a%84udp%e9%80%9a%e4%bf%a1%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%92%8c%e5%ae%a2%e6%88%b7","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/26167.html","title":{"rendered":"\u3010\u7f51\u7edc\u7f16\u7a0b\u3011\u642d\u5efa\u4e00\u4e2a\u7b80\u5355\u7684UDP\u901a\u4fe1\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef"},"content":{"rendered":"

🦄\u4e2a\u4eba\u4e3b\u9875:\u4fee\u4fee\u4fee\u4e5f<\/p>\n

🎏\u6240\u5c5e\u4e13\u680f:\u7f51\u7edc\u7f16\u7a0b<\/p>\n

\u2699\ufe0f\u64cd\u4f5c\u73af\u5883:VS Code (\u64cd\u4f5c\u7cfb\u7edf:Ubuntu 22.04 server 64bit)<\/p>\n

\"\"<\/p>\n

\n

\u76ee\u5f55<\/p>\n

\u642d\u5efaUDP\u670d\u52a1\u5668<\/p>\n

\u642d\u5efaUDP\u5ba2\u6237\u7aef<\/p>\n

\u5176\u4f59\u5de5\u7a0b\u6587\u4ef6<\/p>\n

\u4e3b\u51fd\u6570\u6587\u4ef6Main.cc<\/p>\n

\u65e5\u5fd7\u6253\u5370\u6587\u4ef6Log.hpp<\/p>\n

Makefile\u6587\u4ef6<\/p>\n

\u7ed3\u8bed<\/p>\n

\n

\u642d\u5efaUDP\u670d\u52a1\u5668<\/h2>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u642d\u5efaUDP\u670d\u52a1\u5668\u7684\u4e3b\u8981\u6d41\u7a0b\u4efb\u52a1\u5982\u4e0b:<\/p>\n

\"\"<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u6839\u636e\u6d41\u7a0b\u642d\u5efaUDP\u670d\u52a1\u5668\u5b8c\u6574\u4ee3\u7801\u5982\u4e0b:<\/p>\n

\/\/\u670d\u52a1\u5668<\/p>\n

#pragma once<\/p>\n

#include <iostream>
\n#include <string>
\n#include <strings.h>
\n#include <cstring><\/p>\n

#include <sys\/types.h>
\n#include <sys\/socket.h><\/p>\n

#include <netinet\/in.h>
\n#include <arpa\/inet.h>
\n#include <functional>
\n#include "Log.hpp"<\/p>\n

\/\/ using func_t = std::function<std::string(const std::string&)>;
\ntypedef std::function<std::string(const std::string&)> func_t;<\/p>\n

Log lg;<\/p>\n

enum
\n{
\n SOCKET_ERR=1,
\n BIND_ERR
\n};<\/p>\n

uint16_t defaultport = 8080; \/\/\u7aef\u53e3\u53f7\u7ed11024\u4ee5\u4e0a,\u56e0\u4e3a[0-1023]\u88ab\u7cfb\u7edf\u7ed1\u5b9a\u4e86
\nstd::string defaultip = "0.0.0.0"; \/\/ip\u5730\u5740\u51990\u8868\u793a\u53ea\u8981\u662f\u6211\u8fd9\u53f0\u4e3b\u673a\u7684\u4fe1\u606f\u6211\u90fd\u63a5\u6536
\nconst int size = 1024;<\/p>\n

\/\/\u5c01\u88c5\u670d\u52a1\u5668\u7c7b
\nclass UdpServer
\n{
\npublic:
\n UdpServer(const uint16_t &port = defaultport, const std::string &ip = defaultip):sockfd_(0), port_(port), ip_(ip),isrunning_(false)
\n {}<\/p>\n

void Init()
\n {
\n \/\/ 1. \u521b\u5efaudp socket
\n \/\/ socket(\u57df(\u8868\u660e\u4f60\u652f\u6301\u54ea\u79cd\u534f\u8baeIPv4?IPv6?),\u5957\u63a5\u5b57\u7c7b\u578b(\u9762\u5411\u6570\u636e\u62a5\u8fd8\u662f\u5b57\u8282\u6d41),\u534f\u8bae\u7c7b\u578b(\u4e00\u822c\u53ef\u586b0)) \u8fd4\u56de\u7684\u662f\u4e00\u4e2a\u6587\u4ef6
\n sockfd_ = socket(AF_INET, SOCK_DGRAM, 0); \/\/ PF_INET
\n if(sockfd_ < 0)\/\/\u5982\u679c\u521b\u5efa\u5957\u63a5\u5b57\u5931\u8d25
\n {
\n lg(Fatal, "socket create error, sockfd: %d", sockfd_);
\n exit(SOCKET_ERR);
\n }<\/p>\n

lg(Info, "socket create success, sockfd: %d", sockfd_);<\/p>\n

\/\/ 2. \u7ed1\u5b9abind socket(\u544a\u8bc9\u670d\u52a1\u5668\u6211\u4eec\u8981\u4f7f\u7528\u7684\u7aef\u53e3\u53f7)<\/p>\n

struct sockaddr_in local; \/\/sockaddr_in\u7ed3\u6784\u4f53\u91cc\u5305\u542b[1]16\u4f4d\u534f\u8bae\u7c7b\u578bfamily[2]16\u4f4d\u7aef\u53e3\u53f7port[3]32\u4f4dIP\u5730\u5740addr[4]8\u4f4d\u586b\u5145\u5b57\u6bb5zero
\n bzero(&local, sizeof(local)); \/\/\u628a\u4e00\u6bb5\u6307\u5b9a\u5927\u5c0f\u7684\u5185\u5b58\u521d\u59cb\u5316\u4e3a0<\/p>\n

local.sin_family = AF_INET; \/\/IPv4\u534f\u8bae
\n local.sin_port = htons(port_); \/\/\u7aef\u53e3\u53f7\u548cIP\u5728\u7f51\u7edc\u91cc\u662f\u4e92\u76f8\u4f20\u9012\u7684,\u6240\u4ee5\u9700\u8981\u4fdd\u8bc1\u5927\u5bb6\u53d1\u9001\u7684\u7aef\u53e3\u53f7\u7edf\u4e00\u662f\u7f51\u7edc\u5b57\u8282\u5e8f\u5217，\u8fd9\u6837\u624d\u4e0d\u4f1a\u88ab\u4e0d\u540c\u673a\u5668\u5927\u5c0f\u7aef\u5f71\u54cd
\n local.sin_addr.s_addr = inet_addr(ip_.c_str()); \/\/1. string(\u5b57\u7b26\u4e32ip) -> uint32_t(4\u5b57\u8282ip) 2. uint32_t(4\u5b57\u8282ip)\u5fc5\u987b\u662f\u7f51\u7edc\u5e8f\u5217\u7684
\n \/\/inet_addr:\u628a\u5b57\u7b26\u4e32\u98ce\u683c\u7684Ip\u8f6c\u5316\u4e3a\u7f51\u7edc\u5e8f\u5217\u56db\u5b57\u8282ip
\n \/\/ local.sin_addr.s_addr = htonl(INADDR_ANY); \/\/\u4efb\u610f\u5730\u5740ip<\/p>\n

\/\/bind\u7ed1\u5b9a\u7684\u672c\u8d28\u662f\u628a\u4f60\u5728\u7528\u6237\u6001\u8bbe\u5b9a\u7684\u4e00\u4e2a\u5957\u63a5\u5b57\u53d8\u91cflocal\u7ed1\u5b9a\u5230\u5185\u6838\u91cc
\n int n = bind(sockfd_, (const struct sockaddr*)&local, sizeof(local));
\n if( n < 0) \/\/\u5982\u679cbind\u7ed1\u5b9a\u5931\u8d25
\n {
\n lg(Fatal, "bind error, errno: %d, err string: %s", errno, strerror(errno));
\n exit(BIND_ERR);
\n }
\n lg(Info, "bind success, errno: %d, err string: %s", errno, strerror(errno));
\n }<\/p>\n

\/\/func\u662f\u7528\u6237\u4f20\u5165\u7684\u6570\u636e\u5904\u7406\u65b9\u6cd5
\n void Run(func_t func) \/\/ \u5bf9\u4ee3\u7801\u8fdb\u884c\u5206\u5c42
\n {
\n isrunning_ = true;
\n char inbuffer[size];
\n while(isrunning_)\/\/\u670d\u52a1\u5668\u4e00\u5b9a\u662f\u4e00\u76f4\u5728\u8fd0\u884c\u7684
\n {
\n \/\/\u670d\u52a1\u5668\u8fd0\u884c\u7684\u7b2c\u4e00\u4ef6\u4e8b,\u4eceudp\u8bfb\u53d6\u6570\u636e
\n struct sockaddr_in client;
\n socklen_t len = sizeof(client);
\n \/\/ \\\\|\/\u8fd9\u4e2a\u662f\u7528\u6765\u63a5\u6536\u5bf9\u65b9\u7684\u7aef\u53e3ip\u4fe1\u606f\u7684,\u8bb0\u5f55\u4e0b\u6765\u65b9\u4fbf\u56de\u6d88\u606f\u80fd\u627e\u5230\u5bf9\u65b9
\n ssize_t n = recvfrom(sockfd_, inbuffer, sizeof(inbuffer) – 1, 0, (struct sockaddr*)&client, &len);
\n if(n < 0)\/\/\u63a5\u6536\u4fe1\u606f\u5931\u8d25,\u4e0d\u5f71\u54cd\u540e\u7eed\u8fd0\u884c,\u7ee7\u7eed\u63a5\u6536\u4fe1\u606f\u5c31\u884c
\n {
\n lg(Warning, "recvfrom error, errno: %d, err string: %s", errno, strerror(errno));
\n continue;
\n }<\/p>\n

\/\/\u63a5\u6536\u4fe1\u606f\u6210\u529f,\u8bfb\u5230\u6570\u636e\u4e86
\n \/\/\u52a0\u5de5\u6570\u636e
\n inbuffer[n] = 0;
\n std::string info = inbuffer;
\n \/\/std::string echo_string = "server echo# " + info;<\/p>\n

\/\/\u628a\u5b57\u7b26\u4e32\u6570\u636e\u4ea4\u7ed9func\u51fd\u6570\u5904\u7406
\n std::string echo_string = func(info);<\/p>\n

\/\/std::cout<<"client echo@"<<info<<std::endl;<\/p>\n

\/\/\u52a0\u5de5\u597d\u6570\u636e,\u8fd4\u56de\u7ed9\u5bf9\u65b9
\n sendto(sockfd_, echo_string.c_str(), echo_string.size(), 0, (const sockaddr*)&client, len);
\n }
\n }<\/p>\n

~UdpServer()
\n {
\n if(sockfd_>0) close(sockfd_);
\n }<\/p>\n

private:
\n int sockfd_; \/\/ \u7f51\u8def\u6587\u4ef6\u63cf\u8ff0\u7b26
\n std::string ip_; \/\/ \u4efb\u610f\u5730\u5740bind 0
\n uint16_t port_; \/\/ \u8868\u660e\u670d\u52a1\u5668\u8fdb\u7a0b\u7684\u7aef\u53e3\u53f7
\n bool isrunning_;
\n};<\/p>\n

\n

\u642d\u5efaUDP\u5ba2\u6237\u7aef<\/h2>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u642d\u5efaUDP\u5ba2\u6237\u7aef\u7684\u4e3b\u8981\u6d41\u7a0b\u4efb\u52a1\u5982\u4e0b:<\/p>\n

\"\"<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6839\u636e\u6d41\u7a0b\u642d\u5efaUDP\u5ba2\u6237\u7aef\u5b8c\u6574\u4ee3\u7801\u5982\u4e0b:<\/p>\n

#include<iostream>
\n#include<string>
\n#include<strings.h>
\n#include<cstring>
\n#include<cstdlib>
\n#include<unistd.h>
\n#include<sys\/types.h>
\n#include<sys\/socket.h>
\n#include<netinet\/in.h>
\n#include<arpa\/inet.h>
\nusing namespace std;<\/p>\n

void Usage(std::string proc)
\n{
\n std::cout<<"\\\\n\\\\rUsage: "<<proc<<" serverip serverport\\\\n"<<std::endl;
\n}<\/p>\n

\/\/
\nint main(int argc,char* argv[])
\n{
\n \/\/\u786e\u5b9a\u7528\u6237\u8981\u7ed9\u8c01\u53d1\u6570\u636e
\n if(argc != 3) \/\/\u8fd0\u884c\u7a0b\u5e8f\u7684\u53c2\u6570:\u4e00\u4e2a\u53ef\u6267\u884c\u7a0b\u5e8f\u540d\u548c\u4e00\u4e2aip\u5730\u5740\u548c\u4e00\u4e2a\u7aef\u53e3\u53f7
\n {
\n Usage(argv[0]);
\n exit(0);
\n }<\/p>\n

std::string serverip = argv[1];
\n uint16_t serverport = std::stoi(argv[2]);<\/p>\n

struct sockaddr_in server;
\n bzero(&server,sizeof(server));
\n server.sin_family = AF_INET; \/\/\u8868\u660e\u81ea\u5df1\u7684\u7c7b\u578b
\n server.sin_port = htons(serverport);
\n server.sin_addr.s_addr = inet_addr(serverip.c_str());
\n socklen_t len = sizeof(server);<\/p>\n

\/\/\u521b\u5efa\u5957\u63a5\u5b57
\n int sockfd = socket(AF_INET,SOCK_DGRAM,0);
\n if(sockfd < 0)
\n {
\n cout<<"socker error"<<endl;
\n return 1;
\n }<\/p>\n

\/\/\u5ba2\u6237\u7aef\u8981bind\u7ed1\u5b9a,\u53ea\u4e0d\u8fc7\u4e0d\u9700\u8981\u7528\u6237\u663e\u5f0f\u7ed1\u5b9a,\u4e00\u822c\u7531\u64cd\u4f5c\u7cfb\u7edf\u968f\u673a\u9009\u62e9,\u56e0\u4e3a\u4e00\u4e2a\u7aef\u53e3\u53f7\u53ea\u80fd\u88ab\u4e00\u4e2a\u8fdb\u7a0b\u7ed1\u5b9a,\u64cd\u4f5c\u7cfb\u7edf\u6307\u5b9a\u6709\u5229\u4e8e\u5316\u89e3\u51b2\u7a81
\n \/\/\u670d\u52a1\u5668\u7aef\u53e3\u53f7\u5fc5\u987b\u56fa\u5b9a,\u56e0\u4e3a\u4e0d\u56fa\u5b9a\u7528\u6237\u5f88\u96be\u7b2c\u4e00\u4e0b\u7a33\u5b9a\u7684\u627e\u5230\u4f60,\u5ba2\u6237\u7aef\u4e0d\u7528\u56fa\u5b9a,\u56e0\u4e3a\u670d\u52a1\u7aef\u63a5\u6536\u5ba2\u6237\u7aef\u7684\u6d88\u606f\u65f6\u5c31\u4f1a\u6709\u5ba2\u6237\u7aef\u7684\u5957\u63a5\u5b57<\/p>\n

string message;
\n char buffer[1024];
\n while(true)
\n {
\n \/\/1.\u63a5\u6536\u7528\u6237\u60f3\u53d1\u9001\u7684\u6570\u636e
\n cout<<"Please Enter@ ";
\n getline(cin,message);<\/p>\n

\/\/cout<<message<<endl; \/\/\u5ba2\u6237\u7aef\u56de\u663e\u7ed9\u7528\u6237\u8981\u53d1\u9001\u7684\u6570\u636e<\/p>\n

\/\/2.\u53d1\u9001\u8bf7\u6c42\u6570\u636e\u7ed9\u5ba2\u6237\u7aef
\n sendto(sockfd,message.c_str(),message.size(),0,(struct sockaddr*)&server,len);<\/p>\n

struct sockaddr_in temp;
\n socklen_t len = sizeof(temp);<\/p>\n

\/\/2.\u63a5\u6536\u5ba2\u6237\u7aef\u56de\u590d\u7684\u6570\u636e
\n ssize_t s = recvfrom(sockfd,buffer,1023,0,(struct sockaddr*)&temp,&len);
\n \/\/\u8868\u793a\u6210\u529f\u63a5\u6536\u5230\u5ba2\u6237\u7aef\u8fd4\u56de\u7684\u6570\u636e\u4e86,\u8fd9\u4e2a\u6570\u636e\u7684\u5904\u7406\u65b9\u5f0f\u662f\u6253\u5370
\n if(s>0)
\n {
\n buffer[s]=0;
\n cout<<buffer<<endl;
\n }
\n }<\/p>\n

close(sockfd);
\n return 0;
\n} <\/p>\n

\n

\u5176\u4f59\u5de5\u7a0b\u6587\u4ef6<\/h2>\n

\u4e3b\u51fd\u6570\u6587\u4ef6Main.cc<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u4e3b\u51fd\u6570\u4e2d\u7684\u4ee3\u7801\u903b\u8f91\u5206\u4e3a\u4e24\u90e8\u5206,\u7b2c\u4e00\u662f\u4e3b\u51fd\u6570\u903b\u8f91,\u5373\u521b\u5efa\u5e76\u8fd0\u884c\u670d\u52a1\u5668\u5bf9\u8c61.\u7b2c\u4e8c\u90e8\u5206\u662f\u63d0\u4f9b\u670d\u52a1\u5668\u6570\u636e\u5904\u7406\u7684\u56de\u8c03\u51fd\u6570,\u8fd9\u91cc\u63d0\u4f9b\u4e86\u4e09\u4e2a\u4e0d\u540c\u529f\u80fd\u7684\u56de\u8c03\u51fd\u6570,\u5206\u522b\u662f\u5b57\u7b26\u4e32\u5927\u5c0f\u5199\u8f6c\u6362\u529f\u80fd\u51fd\u6570,\u804a\u5929\u529f\u80fd\u51fd\u6570,\u7b80\u5355\u590d\u8bfb\u673a\u529f\u80fd\u51fd\u6570,\u6307\u4ee4\u6267\u884c\u529f\u80fd\u51fd\u6570.\u8fd9\u4e9b\u56de\u8c03\u51fd\u6570\u9700\u8981\u5728Run\u670d\u52a1\u5668\u7684\u65f6\u5019\u5f53\u4f5c\u53c2\u6570\u4f20\u9012\u7ed9\u670d\u52a1\u5668,\u4ee5\u4fbf\u670d\u52a1\u5668\u8c03\u7528\u8fd9\u4e9b\u51fd\u6570\u6765\u5904\u7406\u63a5\u6536\u5230\u7684\u6570\u636e.\u5b8c\u6574\u4ee3\u7801\u5982\u4e0b:<\/p>\n

#include "UdpServer.hpp"
\n#include<iostream>
\n#include <memory>
\n#include <string>
\n#include <vector>
\n#include <cstdio><\/p>\n

\/\/ "120.78.126.148" \u70b9\u5206\u5341\u8fdb\u5236\u5b57\u7b26\u4e32\u98ce\u683c\u7684IP\u5730\u5740<\/p>\n

void Usage(std::string proc)
\n{
\n std::cout << "\\\\n\\\\rUsage: " << proc << " port[1024+]\\\\n" << std::endl;
\n}<\/p>\n

\/\/\u7b80\u5355\u5904\u7406,\u53ea\u662f\u5728\u6570\u636e\u524d\u52a0\u4e00\u4e2a\u6570\u636e
\nstd::string Handler(const std::string &str)
\n{
\n std::string res = "Server get a message: ";
\n \/\/std::string res = "Server say: ";
\n res += str;
\n std::cout << res << std::endl;<\/p>\n

return res;
\n}<\/p>\n

\/\/\u804a\u5929
\nstd::string talker(const std::string &str)
\n{
\n \/\/std::string res = "Server get a message: ";
\n std::string res = "client say: ";
\n res += str;
\n std::cout << res << std::endl;<\/p>\n

std::string qus;
\n getline(std::cin,qus);<\/p>\n

return qus;
\n}<\/p>\n

\/\/\u5b57\u7b26\u4e32\u5927\u5c0f\u5199\u8f6c\u6362
\nstd::string ToChar(const std::string &str)
\n{
\n std::string res;
\n for(const auto e:str)
\n {
\n if(e>='A'&&e<='Z')
\n res+=(e+32);
\n else if(e>='a'&&e<='z')
\n res+=(e-32);
\n else
\n res+=e;
\n }
\n std::cout << "\u8f6c\u6362\u540e:"<< res << std::endl;
\n return res;
\n}<\/p>\n

\/\/\u68c0\u67e5\u6307\u4ee4\u5408\u7406
\nbool SafeCheck(const std::string &cmd)
\n{
\n std::vector<std::string> key_word = {
\n "rm",
\n "mv",
\n "cp",
\n "kill",
\n "sudo",
\n "unlink",
\n "uninstall",
\n "yum",
\n "top",
\n "while"
\n };
\n for(auto &word:key_word)
\n {
\n auto pos = cmd.find(word);
\n if(pos != std::string::npos) return false;
\n }
\n return true;
\n}<\/p>\n

\/\/\u6267\u884c\u7528\u6237\u8f93\u5165\u6307\u4ee4
\nstd::string ExcuteCommand(const std::string &cmd)
\n{
\n std::cout<<"get a request cmd: "<<cmd<<std::endl;
\n \/\/\u5bf9\u6307\u4ee4\u505a\u5b89\u5168\u68c0\u67e5
\n if(!SafeCheck(cmd)) return "Bad man";<\/p>\n

\/\/\u76f4\u63a5\u7ed9\u6307\u4ee4,popen\u5e2e\u4f60fork\u5b50\u8fdb\u7a0b
\n FILE *fp = popen(cmd.c_str(), "r");
\n if(nullptr == fp)\/\/\u5982\u679cpopen\u5931\u8d25\u4e86
\n {
\n perror("popen");
\n return "error";
\n }<\/p>\n

std::string result;
\n char buffer[4096];
\n \/\/\u4ecefp\u91cc\u628a\u6307\u4ee4\u6267\u884c\u7ed3\u679c\u53d6\u51fa\u6765
\n while(true)
\n {
\n char *ok = fgets(buffer, sizeof(buffer), fp);
\n if(ok == nullptr) break;
\n result += buffer;
\n }
\n pclose(fp);<\/p>\n

return result;
\n}<\/p>\n

\/\/ .\/udpserver port
\nint main(int argc, char *argv[])
\n{
\n if(argc != 2)
\n {
\n Usage(argv[0]);
\n exit(0);
\n }<\/p>\n

uint16_t port = std::stoi(argv[1]);<\/p>\n

\/\/\u6784\u5efa\u4e00\u4e2a\u670d\u52a1\u5668\u5bf9\u8c61
\n std::unique_ptr<UdpServer> svr(new UdpServer(port));<\/p>\n

\/\/\u521d\u59cb\u5316\u670d\u52a1\u5668
\n svr->Init(\/**\/);
\n \/\/\u8fd0\u884c\u670d\u52a1\u5668
\n svr->Run(ExcuteCommand);<\/p>\n

return 0;
\n} <\/p>\n

\n

\u65e5\u5fd7\u6253\u5370\u6587\u4ef6Log.hpp<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u8be5\u6587\u4ef6\u63d0\u4f9b\u4e86\u4e00\u4e2aLog\u7c7b,\u652f\u6301\u76f4\u63a5\u6253\u5370\u65e5\u5fd7\u6216\u5206\u7ea7\u5bfc\u51fa\u65e5\u5fd7\u5230\u76f8\u5e94\u6587\u4ef6\u529f\u80fd,\u662f\u4e00\u4e2a\u975e\u5e38\u597d\u7528\u7684\u65e5\u5fd7\u5c0f\u7ec4\u4ef6.\u5b8c\u6574\u4ee3\u7801\u5982\u4e0b:<\/p>\n

#pragma once
\n#include<iostream>
\n#include<stdarg.h>
\n#include<time.h>
\n#include <sys\/types.h>
\n#include <sys\/stat.h>
\n#include <fcntl.h>
\n#include <unistd.h><\/p>\n

#define SIZE 1024<\/p>\n

#define Info 0
\n#define Debug 1
\n#define Warning 2
\n#define Error 3
\n#define Fatal 4<\/p>\n

#define Screen 1
\n#define Onefile 2
\n#define Classfile 3<\/p>\n

#define LogFile "log.txt"<\/p>\n

class Log
\n{
\npublic:
\n Log()
\n {
\n printMethod = Screen;
\n path = ".\/log\/";
\n }<\/p>\n

void Enable(int method)
\n {
\n printMethod = method;
\n }<\/p>\n

std::string levelToString(int level)
\n {
\n switch(level)
\n {
\n case Info: return "Info";
\n case Debug: return "Debug";
\n case Warning: return "Warning";
\n case Error: return "Error";
\n case Fatal: return "Fatal";
\n default: return "None";
\n }
\n }<\/p>\n

void printLog(int level, const std::string &logtxt)
\n {
\n switch(printMethod)
\n {
\n case Screen:
\n std::cout << logtxt << std::endl;
\n break;
\n case Onefile:
\n printOnefile(LogFile,logtxt);
\n break;
\n case Classfile:
\n printClassfile(level,logtxt);
\n break;
\n default: break;
\n }
\n }
\n void printOnefile(const std::string &logname, const std::string &logtxt)
\n {
\n std::string _logname = path + logname;
\n int fd = open(_logname.c_str(),O_WRONLY|O_CREAT|O_APPEND,0666);
\n if(fd < 0) return;
\n write(fd,logtxt.c_str(),logtxt.size());
\n close(fd);
\n }
\n void printClassfile(int level, const std::string &logtxt)
\n {
\n std::string filename = LogFile;
\n filename +=".";
\n filename += levelToString(level);
\n printOnefile(filename, logtxt);
\n }
\n ~Log()
\n {}<\/p>\n

void operator()(int level,const char* format,…)
\n {
\n time_t t = time(nullptr);
\n struct tm *ctime = localtime(&t);
\n char leftbuffer[SIZE];
\n snprintf(leftbuffer,sizeof(leftbuffer),"[%s][%d-%d-%d %d:%d:%d]",levelToString(level).c_str(),ctime->tm_year+1900,\\\\
\n ctime->tm_mon+1,ctime->tm_mday,ctime->tm_hour,\\\\
\n ctime->tm_min,ctime->tm_sec);<\/p>\n

va_list s;
\n va_start(s,format);
\n char rightbuffer[SIZE];
\n vsnprintf(rightbuffer,sizeof(rightbuffer),format,s);
\n va_end(s);<\/p>\n

char logtxt[SIZE*2];
\n snprintf(logtxt,sizeof(logtxt),"%s %s",leftbuffer,rightbuffer);<\/p>\n

\/\/\u683c\u5f0f:\u9ed8\u8ba4\u90e8\u5206+\u81ea\u5b9a\u4e49\u90e8\u5206
\n \/\/printf("%s\\\\n",logtxt);
\n printLog(level,logtxt);
\n }<\/p>\n

private:
\n int printMethod;
\n std::string path;
\n};<\/p>\n

\n

Makefile\u6587\u4ef6<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u4e3b\u8981\u7528\u4e8e\u81ea\u52a8\u5316\u7f16\u8bd1\u5de5\u7a0b\u6587\u4ef6,\u5b8c\u6574\u6587\u4ef6\u5982\u4e0b:<\/p>\n

.PHONY:all
\nall:udpserver udpclient<\/p>\n

udpserver:Main.cc
\ng++ -o $@ $^ -std=c++11
\nudpclient:UdpClient.cc
\ng++ -o $@ $^ -std=c++11<\/p>\n

.PHONY:clean
\nclean:
\nrm -f udpserver udpclient <\/p>\n

\n

\u7ed3\u8bed<\/h2>\n

\u5e0c\u671b\u8fd9\u7bc7\u5173\u4e8e\u00a0\u642d\u5efa\u4e00\u4e2a\u7b80\u5355\u7684UDP\u901a\u4fe1\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef<\/span> <\/span>\u7684\u535a\u5ba2\u80fd\u5bf9\u5927\u5bb6\u6709\u6240\u5e2e\u52a9,\u6b22\u8fce\u5927\u4f6c\u4eec\u7559\u8a00\u6216\u79c1\u4fe1\u4e0e\u6211\u4ea4\u6d41.<\/p>\n

\u5b66\u6d77\u6f2b\u6d69\u6d69,\u6211\u4ea6\u82e6\u4f5c\u821f!\u5173\u6ce8\u6211,\u5927\u5bb6\u4e00\u8d77\u5b66\u4e60,\u4e00\u8d77\u8fdb\u6b65!<\/p>\n

\u76f8\u5173\u6587\u7ae0\u63a8\u8350<\/p>\n

\n

\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

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