{"id":36741,"date":"2025-05-12T07:16:18","date_gmt":"2025-05-11T23:16:18","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/36741.html"},"modified":"2025-05-12T07:16:18","modified_gmt":"2025-05-11T23:16:18","slug":"%e5%88%9d%e8%af%86linux-%c2%b7-tcp%e5%9f%ba%e6%9c%ac%e4%bd%bf%e7%94%a8-%c2%b7-%e5%9b%9e%e6%98%be%e6%9c%8d%e5%8a%a1%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/36741.html","title":{"rendered":"\u521d\u8bc6Linux \u00b7 TCP\u57fa\u672c\u4f7f\u7528 \u00b7 \u56de\u663e\u670d\u52a1\u5668"},"content":{"rendered":"

\u76ee\u5f55<\/p>\n

\u524d\u8a00：<\/p>\n

\u56de\u663e\u670d\u52a1\u5668<\/p>\n

TCPserver_v0<\/p>\n

TCPserver_v1–\u591a\u8fdb\u7a0b\u7248\u672c<\/p>\n

TCPserver_v2–\u591a\u7ebf\u7a0b\u7248\u672c<\/p>\n

\n

\u524d\u8a00：<\/h2>\n

\u524d\u6587\u6211\u4eec\u4ecb\u7ecd\u4e86UDP\u7684\u57fa\u672c\u4f7f\u7528，\u672c\u6587\u6211\u4eec\u4ecb\u7ecdTCP\u7684\u57fa\u672c\u4f7f\u7528，\u4e0d\u8fc7TCP\u7684\u4f7f\u7528\u6211\u4eec\u8fd9\u91cc\u5148\u505a\u4e00\u4e2a\u9884\u70ed，\u5373\u53ea\u662f\u4f7f\u7528TCP\u7684API\u7b80\u5355\u5b9e\u73b0\u4e00\u4e2a\u56de\u663e\u670d\u52a1\u5668\u5c31\u53ef\u4ee5\u4e86\u3002\u5728\u672c\u6587\u5b9e\u73b0\u56de\u663e\u670d\u52a1\u5668\u7684\u65f6\u5019，\u5206\u4e3a\u4e86\u4e09\u4e2a\u7248\u672c，\u6211\u4eec\u4ece\u7b2c\u4e00\u4e2a\u4e0d\u9760\u8c31\u7248\u672c\u9010\u6e10\u4f18\u5316~<\/p>\n

\u90a3\u4e48\u8bdd\u4e0d\u591a\u8bf4，\u6211\u4eec\u76f4\u63a5\u8fdb\u5165\u56de\u663e\u670d\u52a1\u5668\u7684\u5b9e\u73b0\u3002<\/p>\n

\n

\u56de\u663e\u670d\u52a1\u5668<\/h2>\n

\u5bf9\u4e8e\u56de\u663e\u670d\u52a1\u5668\u6765\u8bf4，\u57fa\u672c\u529f\u80fd\u5c31\u662f\u5ba2\u6237\u7aef\u53d1\u9001\u5b57\u7b26\u4e32，\u7136\u540e\u670d\u52a1\u5668\u6536\u5230\u8fd9\u4e2a\u5b57\u7b26\u4e32\u4e4b\u540e\u518d\u7ed9\u5ba2\u6237\u7aef\u53d1\u9001\u56de\u53bb，\u8fd9\u662f\u5b83\u7684\u4e00\u4e2a\u57fa\u672c\u529f\u80fd，\u90a3\u4e48\u6211\u4eec\u4eceTCPserver_v1\u5f00\u59cb\u5b9e\u73b0\u3002<\/p>\n

TCPserver_v0<\/h3>\n

\u5bf9\u4e8e\u7248\u672c\u4e00，\u5b83\u7684\u5f0a\u7aef\u662f\u53ea\u80fd\u901a\u4fe1\u4e00\u4e2a\u5ba2\u6237\u7aef，\u591a\u4e86\u4f1a\u963b\u585e，\u5148\u57cb\u4e0b\u4f0f\u7b14，\u6211\u4eec\u540e\u9762\u6162\u6162\u89e3\u91ca\u3002<\/p>\n

\u9996\u5148，\u4e0d\u7ba1\u662fTCP\u8fd8\u662fUDP，\u90fd\u662f\u57fa\u4e8e\u7f51\u7edc\u5957\u63a5\u5b57\u8fdb\u884c\u901a\u4fe1\u7684，\u90a3\u4e48\u4e5f\u5c31\u662f\u8bf4，TCP\u4e5f\u9700\u8981\u521b\u5efa\u5957\u63a5\u5b57，bind，\u5230\u4e86bind\u4e4b\u540eUDP\u5c31\u53ef\u4ee5\u901a\u4fe1\u4e86，\u4f46\u662fTCP\u56e0\u4e3a\u662f\u9762\u5411\u8fde\u63a5\u7684，\u6240\u4ee5TCP\u9700\u8981\u989d\u5916\u7684\u8fdb\u5165listen\u72b6\u6001，\u5e76\u4e14\u5f00\u59cbaccept，\u5ba2\u6237\u7aef\u8981\u8fdb\u884c\u901a\u4fe1\u4e5f\u9700\u8981connect\u3002<\/p>\n

\u5177\u4f53\u4ec0\u4e48\u662flisten，\u4ec0\u4e48\u662faccept，\u4ec0\u4e48\u662fconnect，\u6211\u4eec\u8fd9\u91cc\u5c55\u5f00\u3002<\/p>\n

\u5bf9\u4e8elisten<\/span>\u6765\u8bf4，\u8ba9\u670d\u52a1\u5668\u8fdb\u5165listen\u72b6\u6001，\u5c31\u76f8\u5f53\u4e8e\u544a\u8bc9\u522b\u4eba，\u6211\u51c6\u5907\u597d\u4e86，\u53ef\u4ee5\u5f00\u59cb\u51c6\u5907\u8fde\u63a5\u4e86，\u4f7f\u7528\u5230\u7684API\u662flisten：\"\"<\/p>\n

\u5b83\u7684\u53c2\u6570\u662fsockfd\u548cbacklog，\u5bf9\u4e8esockfd\u662f\u6211\u4eec\u521b\u5efa\u7684\u5957\u63a5\u5b57，\u8fd9\u4e2a\u5957\u63a5\u5b57\u6211\u4eec\u6700\u597d\u547d\u540d\u4e3alistensockfd，\u56e0\u4e3a\u8fd9\u4e2a\u5957\u63a5\u5b57\u53ea\u662f\u7528\u6765\u8fdb\u884c\u8fde\u63a5\u7684，\u540e\u9762\u5b9e\u9645\u4e0a\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef\u8fdb\u884c\u901a\u4fe1\u662f\u901a\u8fc7\u53e6\u4e00\u4e2a\u5957\u63a5\u5b57\u8fdb\u884c\u7684\u3002\u5bf9\u4e8ebacklog\u6211\u4eec\u540e\u9762\u5355\u72ec\u5199\u4e00\u7bc7\u6587\u7ae0\u4ecb\u7ecd\u3002<\/p>\n

\u5b83\u7684\u8fd4\u56de\u503c\u548csocket bind\u662f\u4e00\u6837\u7684，\u5982\u679clisten\u5931\u8d25，\u8fd4\u56de\u7684\u5c31\u662f-1，\u6210\u529f\u8fd4\u56de\u7684\u5c31\u662f0，\u6211\u4eec\u4e5f\u53ef\u4ee5\u901a\u8fc7netstat -ntpl<\/span>，\u5176\u4e2d\u7684l\u4ee3\u8868\u7684\u5c31\u662f\u67e5\u8be2\u5904\u4e8elisten\u72b6\u6001\u7684\u7f51\u7edc\u3002\"\"<\/p>\n

\u5230\u4e86\u8fd9\u4e00\u6b65，socket bind listen，\u6211\u4eec\u7684\u670d\u52a1\u5668\u7684\u521d\u59cb\u5316\u5b8c\u6210\u4e86，\u5bf9\u5e94\u7684\u4ee3\u7801\u5e94\u8be5\u662f：<\/p>\n

void Init()
\n {
\n \/\/ socket
\n _listensocket = socket(AF_INET, SOCK_STREAM, 0);
\n if (_listensocket < 0)
\n {
\n perror("socket");
\n exit(SOCKET_ERR);
\n }
\n \/\/ bind
\n sockaddr_in server;
\n memset(&server, 0, sizeof(server));
\n server.sin_family = AF_INET;
\n server.sin_port = htons(_port);
\n server.sin_addr.s_addr = INADDR_ANY;<\/p>\n

socklen_t len = sizeof(server);
\n if (::bind(_listensocket, (struct sockaddr *)&server, len) < 0)
\n {
\n perror("bind");
\n exit(BIND_ERR);
\n }<\/p>\n

\/\/ listen
\n int n = ::listen(_listensocket, gbacklog);
\n if (n < 0)
\n {
\n perror("listen");
\n exit(LISTEN_ERR);
\n }
\n } <\/p>\n

\u5982\u679c\u6211\u4eec\u60f3\u50cf\u5b58\u5728\u4e00\u4e2a\u9910\u9986，\u90a3\u4e48listen\u5c31\u4ee3\u8868\u9910\u9986\u5f00\u4e1a\u4e86，\u8981\u5f00\u59cb\u670d\u52a1\u4e86，\u8981\u5f00\u59cb\u62c9\u5ba2\u4e86\u3002<\/p>\n

\u597d\u4e86 \u73b0\u5728\u5bf9\u4e8etcp\u901a\u4fe1\u670d\u52a1\u6700\u96be\u7684\u4e00\u4e2a\u70b9\u5c31\u6765\u4e86，accept\u7684\u7406\u89e3<\/span>\u3002<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\u5bf9\u4e8eaccept\u7684\u53c2\u6570，\u7b2c\u4e00\u4e2a\u53c2\u6570\u662fsockfd，\u540e\u9762\u7684\u4e24\u4e2a\u53c2\u6570\u662f\u5ba2\u6237\u7aef\u7684\u76f8\u5173\u4fe1\u606f，\u5f53\u6211\u4eec\u770b\u5230\u8fd4\u56de\u503c\u7684\u65f6\u5019，\u6211\u4eec\u53d1\u73b0，\u5982\u679caccept\u6210\u529f\u7684\u65f6\u5019，\u8fd4\u56de\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26，\u9519\u8bef\u7684\u65f6\u5019\u8fd4\u56de-1\u5e76\u4e14\u9519\u8bef\u7801\u88ab\u8bbe\u7f6e\u3002<\/p>\n

\u8fd9\u91cc\u7684\u96be\u70b9\u662f：\u5982\u4f55\u7406\u89e3socket\u8fd4\u56de\u7684sockfd\u548caccept\u8fd4\u56de\u7684sockfd？<\/span><\/p>\n

\u5bf9\u4e8esocket\u8fd4\u56de\u7684sockfd，\u6211\u4eec\u628a\u5b83\u662f\u4f5c\u4e3alisten\u7684\u53c2\u6570\u4f7f\u7528\u7684，\u610f\u5728\u544a\u8bc9\u522b\u4eba\u6211\u8fd9\u4e2a\u670d\u52a1\u5668\u5df2\u7ecf\u5c31\u7eea\u4e86，\u53ef\u4ee5\u5f00\u59cb\u8fde\u63a5\u4e86，\u90a3\u4e48socket\u8fd4\u56de\u7684sockfd\u5c31\u50cf\u662f\u9910\u9986\u672c\u4f53，\u8fdb\u884c\u5916\u90e8\u7684\u8fde\u63a5，\u5bf9\u4e8eaccept\u8fd4\u56de\u7684sockfd，\u5c31\u50cf\u662f\u9910\u9986\u548c\u5ba2\u4eba\u8fdb\u884c\u4e86\u8fde\u63a5\u4e4b\u540e，\u8be5\u901a\u8fc7\u54ea\u4e2a\u670d\u52a1\u5458\u8fdb\u884c\u548c\u5ba2\u4eba\u7684\u4ea4\u4e92，\u6240\u4ee5\u5b9e\u9645\u4e0a\u548c\u5ba2\u4eba\u8fdb\u884c\u901a\u4fe1\u7684\u662faccept\u8fd4\u56de\u7684\u5957\u63a5\u5b57\u3002\u540e\u9762\u4e3a\u4e86\u533a\u5206，\u6211\u4eec\u5c06socket\u8fd4\u56de\u7684\u5957\u63a5\u5b57\u53eb\u505a\u76d1\u542c\u5957\u63a5\u5b57<\/span>，accept\u8fd4\u56de\u7684\u5957\u63a5\u5b57\u5c31\u53eb\u505a\u8fde\u63a5\u5957\u63a5\u5b57<\/span>\u3002<\/p>\n

\u6709\u4e86\u8fd9\u4e2a\u5957\u63a5\u5b57，\u6211\u4eec\u624d\u80fd\u548c\u5ba2\u6237\u7aef\u8fdb\u884c\u901a\u4fe1，\u90a3\u4e48\u670d\u52a1\u5668\u4e0b\u4e00\u6b65\u5c31\u662f\u901a\u8fc7sockfd\u5904\u7406\u548c\u5ba2\u4eba\u7684\u8bf7\u6c42，\u90a3\u4e48\u56e0\u4e3a\u662f\u56de\u663e\u529f\u80fd，\u5728UDP\u7684\u65f6\u5019，\u4f7f\u7528\u7684\u662fsendto\u548crecvfrom，\u5728TCP\u8fd9\u91cc\u5c31\u6bd4\u8f83\u7279\u6b8a\u4e86，\u56e0\u4e3aTCP\u662f\u9762\u5411\u8fde\u63a5\u7684，\u90a3\u4e48\u53cc\u65b9\u7ecf\u8fc7\u4e86\u4e09\u6b21\u63e1\u624b，\u83b7\u53d6\u5230\u4e86\u5bf9\u5e94\u7684sockfd，\u4e0d\u8981\u5fd8\u4e86sockfd\u672c\u8d28\u4e0a\u662f\u6587\u4ef6\u63cf\u8ff0\u7b26，\u6240\u4ee5\u6709\u4e86\u6587\u4ef6\u63cf\u8ff0\u7b26，\u53cc\u65b9\u662f\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528read write\u8fdb\u884c\u6587\u4ef6\u8bfb\u5199\u7684\u3002<\/p>\n

\u5bf9\u4e8ewrite\u7684\u672c\u8d28，\u662fOS\u5c06\u7528\u6237\u63d0\u4f9b\u7684\u6570\u636e，\u62f7\u8d1d\u5230\u5185\u6838\u4e2d\u7684\u53d1\u9001\u7f13\u51b2\u533a，\u7136\u540e\u8fdb\u884c\u5206\u6bb5，\u52a0TCP\u62a5\u5934，\u901a\u8fc7\u7f51\u5361\u53d1\u9001\u51fa\u53bb，\u5bf9\u4e8eread\u7684\u672c\u8d28\u4e5f\u662f\u4e00\u6837\u7684，\u6570\u636e\u5148\u5230\u63a5\u6536\u7f13\u51b2\u533a，TCP\u8d1f\u8d23\u7ec4\u5305\u4e00\u7c7b\u7684\u5de5\u4f5c\u3002<\/p>\n

\u6240\u4ee5\u6211\u4eec\u7684service\u51fd\u6570\u5c31\u53ef\u4ee5\u8fd9\u4e48\u5199\u4e86:<\/p>\n

void Service(int sockfd)
\n {
\n while (true)
\n {
\n \/\/ read write
\n char buffer[1024];
\n ssize_t n = ::read(sockfd, buffer, sizeof(buffer) – 1);
\n if (n > 0)
\n {
\n buffer[n] = 0;
\n std::string echo = "[Server say]# ";
\n echo += buffer;
\n ssize_t wn = ::write(sockfd, echo.c_str(), echo.size());
\n }
\n else if (n == 0)
\n {
\n std::cout << "client quit" << std::endl;
\n break;
\n }
\n else
\n {
\n if (errno == EINTR) continue;
\n std::cout << "read error" << std::endl;
\n break;
\n }
\n }
\n ::close(sockfd);
\n } <\/p>\n

\u76f4\u63a5\u8c03\u7528，\u5c31\u548c\u6211\u4eec\u4e4b\u524dC\u8bed\u8a00\u5b66\u4e60\u7684\u6587\u4ef6\u64cd\u4f5c\u4e00\u6837，\u5e76\u4e14\u8fd9\u91cc\u6709\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u70b9\u662fservice\u7ed3\u675f\u4e4b\u540e\u6211\u4eec\u4e00\u5b9a\u8981close(sockfd)<\/span>，\u4e0d\u7136\u662f\u4f1a\u5bfc\u81f4\u6587\u4ef6\u63cf\u8ff0\u7b26\u6cc4\u9732\u7684，\u8fd9\u4e2a\u64cd\u4f5c\u662f\u975e\u5e38\u5371\u9669\u7684！！！<\/p>\n

\u90a3\u4e48\u5bf9\u4e8eread\u548cwrite\u7684\u8fd4\u56de\u503c，\u5177\u4f53\u7684\u6211\u4eec\u5230\u540e\u9762\u518d\u8c08\u3002<\/p>\n

\u6240\u4ee5\u8fd9\u4e2a\u65f6\u5019，\u6211\u4eec\u7684TCP\u670d\u52a1\u7c7b\u4e5f\u5dee\u4e0d\u591a\u4e86，\u5bf9\u4e8e\u5faa\u73af\u670d\u52a1\u7684\u4ee3\u7801，\u7b2c\u4e00\u4e2a\u7248\u672c\u662f\u8fd9\u6837\u7684：<\/p>\n

#include <iostream>
\n#include <unistd.h>
\n#include <sys\/wait.h>
\n#include <cstring>
\n#include <functional>
\n#include <sys\/types.h>
\n#include <sys\/socket.h>
\n#include <netinet\/in.h>
\n#include <arpa\/inet.h><\/p>\n

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

const static int gbacklog = 8;<\/p>\n

class TcpServer
\n{
\npublic:
\n TcpServer(int port)
\n : _port(port)
\n {
\n }<\/p>\n

void Init()
\n {
\n \/\/ socket
\n _listensocket = socket(AF_INET, SOCK_STREAM, 0);
\n if (_listensocket < 0)
\n {
\n perror("socket");
\n exit(SOCKET_ERR);
\n }
\n \/\/ bind
\n sockaddr_in server;
\n memset(&server, 0, sizeof(server));
\n server.sin_family = AF_INET;
\n server.sin_port = htons(_port);
\n server.sin_addr.s_addr = INADDR_ANY;<\/p>\n

socklen_t len = sizeof(server);
\n if (::bind(_listensocket, (struct sockaddr *)&server, len) < 0)
\n {
\n perror("bind");
\n exit(BIND_ERR);
\n }<\/p>\n

\/\/ listen
\n int n = ::listen(_listensocket, gbacklog);
\n if (n < 0)
\n {
\n perror("listen");
\n exit(LISTEN_ERR);
\n }
\n }<\/p>\n

void Loop()
\n {
\n \/\/ signal(SIGCHLD, SIG_IGN);
\n bool _isrunning = true;
\n while (_isrunning)
\n {<\/p>\n

\/\/ accept
\n sockaddr_in client;
\n socklen_t len = sizeof(client);
\n int sockfd = ::accept(_listensocket, (struct sockaddr *)&client, &len);
\n if (sockfd < 0)
\n {
\n std::cout << "accept error" << std::endl;
\n continue;
\n }
\n \/\/ service<\/p>\n

\/\/ version–1
\n Service(sockfd);
\n }
\n }<\/p>\n

void Service(int sockfd)
\n {
\n while (true)
\n {
\n \/\/ read write
\n char buffer[1024];
\n ssize_t n = ::read(sockfd, buffer, sizeof(buffer) – 1);
\n if (n > 0)
\n {
\n buffer[n] = 0;
\n std::string echo = "[Server say]# ";
\n echo += buffer;
\n ssize_t wn = ::write(sockfd, echo.c_str(), echo.size());
\n }
\n else if (n == 0)
\n {
\n std::cout << "client quit" << std::endl;
\n break;
\n }
\n else
\n {
\n if (errno == EINTR) continue;
\n std::cout << "read error" << std::endl;
\n break;
\n }
\n }
\n ::close(sockfd); \/\/
\n }
\n ~TcpServer()
\n {
\n }<\/p>\n

private:
\n uint16_t _port;
\n int _listensocket;
\n}; <\/p>\n

\u5bf9\u4e8e\u670d\u52a1\u5668\u7684Main\u65b9\u6cd5\u548c\u4e4b\u524dUDP\u7684\u65f6\u5019\u662f\u4e00\u6837\u7684，\u5229\u7528\u547d\u4ee4\u884c\u53c2\u6570\u5217\u8868\u7ed9\u5230\u5bf9\u5e94\u7684IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\u5373\u53ef：<\/p>\n

#include "TcpServer.hpp"
\n#include <functional>
\n#include <memory><\/p>\n

int main(int argc, char *argv[])
\n{
\n if(argc != 2)
\n {
\n perror("parameter error");
\n exit(-1);
\n }<\/p>\n

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

std::unique_ptr<TcpServer> tsver = std::make_unique<TcpServer>(port);
\n tsver->Init();
\n tsver->Loop();<\/p>\n

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

\u8fd9\u662f\u670d\u52a1\u5668\u7684，\u5bf9\u4e8e\u5ba2\u6237\u7aef\u5012\u662f\u6709\u70b9\u4e0d\u540c\u4e86\u3002<\/p>\n

\u5ba2\u6237\u7aef\u4ee3\u7801\u7f16\u5199：<\/span><\/p>\n

\u5ba2\u6237\u7aef\u5927\u90e8\u5206\u4ee3\u7801\u548cUDP\u90a3\u91cc\u5f88\u50cf，\u540c\u6837\u8981\u5b9a\u4e49\u670d\u52a1\u5668\u7684sockaddr_in，\u5e76\u4e14\u586b\u5145\u5bf9\u5e94\u7684\u4fe1\u606f，\u8fd9\u91cc\u4e5f\u6709\u4e00\u4e2a\u4e98\u53e4\u4e0d\u53d8\u7684\u8bdd\u9898，\u5ba2\u6237\u7aef\u662f\u5426\u9700\u8981\u663e\u793a\u7684bind\u81ea\u5df1\u7684sockfd\u548csockaddr_in？<\/p>\n

\u5f53\u7136\u662f\u4e0d\u9700\u8981\u7684，\u56e0\u4e3a\u8fd9\u4e2a\u64cd\u4f5cOS\u5df2\u7ecf\u9690\u5f0f\u7684\u5e2e\u6211\u4eec\u505a\u4e86，\u6211\u4eec\u4e0d\u7528\u81ea\u5df1\u505a\u4e86\u3002<\/p>\n

\u6240\u4ee5\u5f53\u6211\u4eec\u521b\u5efa\u597d\u4e86server\u7684sockaddr_in \u5e76\u4e14\u76f8\u5173\u7684\u5b57\u6bb5\u4e5f\u586b\u5145\u597d\u4e86，\u7136\u540e\u5c31\u662fTCP\u4e13\u6709\u7684\u64cd\u4f5c\u4e86，\u5ba2\u6237\u7aef\u9700\u8981\u4f7f\u7528connect\u8fdb\u884c\u8fde\u63a5，\u4f7f\u7528connect\u53d1\u8d77\u4e09\u6b21\u63e1\u624b，\u5f53\u7136\u5177\u4f53\u64cd\u4f5c\u6211\u4eec\u540e\u9762\u4ecb\u7ecd，\u6211\u4eec\u73b0\u5728\u53ea\u9700\u8981\u77e5\u9053\u5ba2\u6237\u7aef\u9700\u8981\u8fdb\u884cconnect\u548c\u670d\u52a1\u5668\u8fdb\u884c\u8fde\u63a5\u5c31\u884c，\"\"<\/p>\n

\u5b83\u7684\u53c2\u6570\u5c31\u662f\u5ba2\u6237\u7aef\u7684sockfd，\u540e\u9762\u7684\u4e24\u4e2a\u53c2\u6570\u662f\u548c\u8c01\u8fde\u63a5\u7684sockaddr_in\u3002<\/p>\n

\u8fde\u63a5\u597d\u4e86\u4e4b\u540e\u5c31\u53ef\u4ee5\u5f00\u59cb\u901a\u4fe1\u4e86：<\/p>\n

#include <iostream>
\n#include <cstring>
\n#include <unistd.h>
\n#include <functional>
\n#include <sys\/types.h>
\n#include <sys\/socket.h>
\n#include <netinet\/in.h>
\n#include <arpa\/inet.h><\/p>\n

int main(int argc, char *argv[])
\n{
\n if(argc != 3)
\n {
\n perror("parameter");
\n exit(-1);
\n }<\/p>\n

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

int sockfd = ::socket(AF_INET, SOCK_STREAM, 0);
\n struct sockaddr_in server;
\n memset(&server, 0, sizeof(server));
\n server.sin_family = AF_INET;
\n server.sin_port = htons(serverport);
\n ::inet_pton(AF_INET, serverip.c_str(), &server.sin_addr);<\/p>\n

if(connect(sockfd, (struct sockaddr*)&server, sizeof(server)) < 0)
\n {
\n perror("connect");
\n exit(1);
\n } <\/p>\n

while(1)
\n {
\n std::cout << "[client say]# ";
\n std::string message;
\n std::getline(std::cin, message);<\/p>\n

write(sockfd, message.c_str(), message.size());<\/p>\n

char buffer[1024];
\n ssize_t n = read(sockfd, buffer, sizeof(buffer) – 1);
\n if(n > 0)
\n std::cout << buffer << std::endl;
\n else
\n break;<\/p>\n

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

\u90a3\u4e48\u4ee5\u4e0a\u5c31\u662f\u4e09\u4e2a\u6587\u4ef6\u7684\u7b80\u5355\u7f16\u5199，\u4e0d\u8fc7\u6211\u4eec\u662f\u80fd\u53d1\u73b0，\u5982\u679c\u6211\u4eec\u542f\u52a8\u4e24\u4e2a\u5ba2\u6237\u7aef，\u670d\u52a1\u5668\u5c31\u4f1a\u963b\u585e，\u6240\u4ee5\u7b2c\u4e00\u4e2a\u7248\u672c\u7684\u6700\u5927\u5f0a\u7aef，\u662f\u4e0d\u80fd\u591f\u5e76\u53d1\u6267\u884c\u591a\u4e2a\u8bf7\u6c42，\u5b83\u662f\u4e32\u884c\u7684<\/span>，\u90a3\u80af\u5b9a\u4e0d\u53ef\u4ee5，\u6211\u4eec\u9700\u8981\u8fdb\u884c\u6539\u52a8\u3002<\/p>\n

TCPserver_v1–\u591a\u8fdb\u7a0b\u7248\u672c<\/h3>\n

\u5b9e\u9645\u4e0a\u6211\u4eec\u8981\u6539\u52a8\u7684\u53ea\u6709loop\u51fd\u6570，\u56e0\u4e3a\u6211\u4eec\u660e\u663e\u53d1\u73b0\u51fd\u6570loop，\u5f53\u670d\u52a1\u5668accept\u6210\u529f\u7684\u65f6\u5019，\u5c31\u5f00\u59cb\u6267\u884cservice\u7684\u65f6\u5019，\u5982\u679c\u8be5\u5ba2\u6237\u7aef\u4e0d\u9000\u51fa，\u670d\u52a1\u5668\u5c31\u8981\u4e00\u76f4\u5728\u8fd9\u4e2a\u5faa\u73af\u91cc\u9762\u4e3a\u5b83\u670d\u52a1，\u6240\u4ee5\u6211\u4eec\u4e0d\u80fd\u8ba9\u670d\u52a1\u5668\u4e3b\u4f53\u6765\u670d\u52a1\u5ba2\u6237\u7aef，\u5e94\u8be5\u8ba9\u522b\u4eba\u670d\u52a1\u5ba2\u6237\u7aef，\u5177\u4f53\u662f\u54ea\u4e2a\u5ba2\u6237\u7aef\u5462？<\/p>\n

\u6211\u4eec\u53ef\u4ee5\u8ba9\u5b50\u8fdb\u7a0b\u6765\u670d\u52a1\u5bf9\u5427？<\/p>\n

\/\/ version–2 \u591a\u8fdb\u7a0b\u7248\u672c
\npid_t id = fork();
\nif (id == 0)
\n{
\n \/\/ child
\n ::close(_listensocket);
\n if (fork() > 0) exit(0);<\/p>\n

Service(sockfd); \/\/ \u5b59\u5b50\u8fdb\u7a0b\u6267\u884c
\n exit(0);
\n}<\/p>\n

\/\/ ::close(sockfd);
\n else
\n {
\n \/\/ father
\n ::close(sockfd);
\n int n = waitpid(id, nullptr, 0);<\/p>\n

if (n > 0) \/\/ \u5ffd\u7565\u6700\u597d
\n std::cout << "wait success!" << std::endl;
\n } <\/p>\n

\u90a3\u4e48\u95ee\u9898\u6765\u4e86，\u5982\u679c\u6211\u4eec\u8ba9\u5b50\u8fdb\u7a0b\u6765\u670d\u52a1，\u90a3\u4e48\u7236\u8fdb\u7a0b\u662f\u4e0d\u662f\u9700\u8981\u7b49\u5f85\u5b50\u8fdb\u7a0b\u9000\u51fa？\u5e76\u4e14\u63a5\u6536\u5230SIGCHLD\u4fe1\u53f7\u7136\u540e\u53bb\u56de\u6536\u5b50\u8fdb\u7a0b？\u8fd9\u6837\u5bfc\u81f4\u7684\u95ee\u9898\u662f\u7236\u8fdb\u7a0b\u4ecd\u7136\u4f1a\u56e0\u4e3a\u7b49\u5f85\u5b50\u8fdb\u7a0b\u800c\u963b\u585e，\u4ece\u800c\u4e0d\u80fd\u670d\u52a1\u5176\u4ed6\u5ba2\u6237\u7aef，\u6240\u4ee5，\u6211\u4eec\u9700\u8981\u4f7f\u7528\u53ccfork\u6280\u5de7<\/span>\u3002\u5373\u8ba9\u5b50\u8fdb\u7a0b\u518dfork，\u521b\u5efa\u5b59\u5b50\u8fdb\u7a0b，\u8ba9\u5b59\u5b50\u8fdb\u7a0b\u6267\u884c\u670d\u52a1，\u5b50\u8fdb\u7a0b\u521b\u5efa\u6210\u529f\u5c31\u9000\u51fa，\u8fd9\u6837\u7236\u8fdb\u7a0b\u4e5f\u4e0d\u4f1a\u963b\u585e，\u76f4\u63a5\u7b49\u5f85\u5c31\u6210\u529f\u4e86\u3002<\/p>\n

\u4e0d\u8fc7\u8fd9\u91cc\u5176\u5b9e\u6700\u597d\u7684\u65b9\u6cd5\u662f\u4f7f\u7528signal(SIGCHLD,SIG_IGN)，\u5373\u5ffd\u7565\u4fe1\u53f7，\u4e0d\u7b49\u5f85，\u5f53\u7136\u4e5f\u53ef\u4ee5\u4f7f\u7528\u7684\u53ccfork\u6280\u5de7，\u90fd\u662f\u53ef\u4ee5\u7684\u3002\u53cd\u6b63\u6700\u540e\u603b\u6709\u4e00\u4e2a\u8fdb\u7a0b\u662f\u4ea4\u7ed9\u7cfb\u7edf\u5904\u7406\u7684\u3002<\/p>\n

\u5f53\u7136\u4e86，\u5728\u8fd9\u91cc\u6211\u4eec\u4f1a\u6d89\u53ca\u5230\u7cfb\u7edf\u5c42\u9762\u7684\u77e5\u8bc6，\u5373\u7236\u8fdb\u7a0b\u5b50\u8fdb\u7a0b\u662f\u5171\u4eab\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868\u7684，\u8fd9\u91cc\u6211\u4eec\u5efa\u8bae，\u7236\u8fdb\u7a0b\u5173\u95edsockfd，\u5b50\u8fdb\u7a0b\u5173\u95edlistensockfd，\u56e0\u4e3a\u4e5f\u7528\u4e0d\u4e0a，\u5e76\u4e14\u5982\u679c\u4e0d\u5c0f\u5fc3\u8bef\u64cd\u4f5c\u4e86，\u5c31\u4f1a\u5bfc\u81f4\u8f83\u4e3a\u4e25\u91cd\u7684\u540e\u679c，\u6240\u4ee5\u5efa\u8bae\u5173\u95ed\u3002<\/p>\n

\u4ee5\u4e0a\u5c31\u662f\u7b2c\u4e8c\u4e2a\u591a\u8fdb\u7a0b\u7248\u672c\u3002<\/p>\n

\n

TCPserver_v2–\u591a\u7ebf\u7a0b\u7248\u672c<\/h3>\n

\u90fd\u6709\u4e86\u591a\u8fdb\u7a0b\u4e86，\u591a\u7ebf\u7a0b\u4e0d\u8fc7\u5206\u5427？<\/p>\n

\u4f7f\u7528\u591a\u7ebf\u7a0b\u7684\u65f6\u5019，\u6211\u4eec\u8981\u6ce8\u610f\u4e24\u4e2a\u70b9：<\/p>\n

1.\u7ebf\u7a0b\u4e4b\u95f4\u662f\u5171\u4eab\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868\u7684，\u6240\u4ee5\u8fd9\u91cc\u6211\u4eec\u662f\u4e00\u5b9a\u4e0d\u80fd\u5173\u95ed\u6587\u4ef6\u63cf\u8ff0\u7b26 2.\u7ebf\u7a0b\u6267\u884c\u7684\u51fd\u6570\u9ed8\u8ba4\u53c2\u6570\u662fvoid* args，\u4f46\u662f\u6210\u5458\u51fd\u6570\u9ed8\u8ba4\u6709\u53c2\u6570this\u6307\u9488，\u6240\u4ee5\u9700\u8981\u4f7f\u7528static<\/span><\/p>\n

\u8fd9\u91cc\u5c31\u662f\u4e24\u4e2a\u6700\u4e3b\u8981\u7684\u95ee\u9898，\u7136\u540e\u65e2\u7136\u6ca1\u6709this\u6307\u9488，\u6211\u4eec\u6ca1\u6709\u529e\u6cd5\u8c03\u7528service，\u6211\u4eec\u5c31\u9700\u8981\u5355\u72ec\u521b\u5efa\u4e00\u4e2a\u7c7b，\u7528\u6765\u63a5\u6536TCPserver\u7684\u5b57\u6bb5，\u5176\u5b9e\u5c31\u662f\u8fc7\u6e21\u4e00\u4e0b\u6ca1\u6709this\u6307\u9488\u7684\u95ee\u9898：<\/span><\/p>\n

class ThreadData
\n {
\n public:
\n int _sockfd;
\n TcpServer *_self;<\/p>\n

public:
\n ThreadData(int sockfd, TcpServer *self)
\n : _sockfd(sockfd), _self(self)
\n {
\n }
\n };<\/p>\n

void Loop()
\n {
\n \/\/ signal(SIGCHLD, SIG_IGN);
\n bool _isrunning = true;
\n while (_isrunning)
\n {<\/p>\n

\/\/ accept
\n sockaddr_in client;
\n socklen_t len = sizeof(client);
\n int sockfd = ::accept(_listensocket, (struct sockaddr *)&client, &len);
\n if (sockfd < 0)
\n {
\n std::cout << "accept error" << std::endl;
\n continue;
\n }
\n \/\/ service<\/p>\n

\/\/ version–3 \u591a\u7ebf\u7a0b\u7248\u672c
\n pthread_t tid;
\n ThreadData *td = new ThreadData(sockfd, this);
\n pthread_create(&tid, nullptr, Excute, td); \/\/ 1.\u6210\u5458\u51fd\u6570\u9ed8\u8ba4\u6709this\u6307\u9488
\n }
\n }
\n static void *Excute(void *args)
\n {
\n pthread_detach(pthread_self()); \/\/ \u4e3a\u4e86\u8ba9\u4e3b\u7ebf\u7a0b\u4e0d\u7b49\u5f85
\n ThreadData *td = static_cast<ThreadData *>(args);
\n td->_self->Service(td->_sockfd);<\/p>\n

delete td;
\n return nullptr;
\n } <\/p>\n

\u5e76\u4e14，\u4e3a\u4e86\u9632\u6b62\u5185\u5b58\u6cc4\u9732，\u6211\u4eec\u8fd9\u91cc\u5343\u4e07\u4e0d\u8981\u5fd8\u4e86delete td，\u7136\u540e\u7ebf\u7a0b\u548c\u8fdb\u7a0b\u4e00\u6837，\u6211\u4eec\u4e0d\u5e0c\u671b\u4e3b\u7ebf\u7a0b\u7b49\u5f85\u5b83，\u6240\u4ee5\u4f7f\u7528\u7ebf\u7a0b\u5206\u79bb，\u5b83\u6267\u884c\u5b8c\u4e86\u4e4b\u540e\u5b83\u81ea\u5df1\u91ca\u653e\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n

\u4ee5\u4e0a\u5c31\u662f\u591a\u7ebf\u7a0b\u7248\u672c，\u5176\u5b9e\u6211\u4eec\u80fd\u53d1\u73b0\u4e0d\u7ba1\u662f\u4ec0\u4e48\u7248\u672c，\u53ea\u662f\u4e3a\u4e86\u6539\u52a8\u670d\u52a1\u51fd\u6570\u7684\u8c03\u7528\u800c\u5df2\u3002<\/p>\n

TCP\u7684\u7b2c\u4e00\u4e2a\u57fa\u672c\u4f7f\u7528\u5c31\u5230\u6b64\u7ed3\u675f\u4e86~~<\/p>\n

\n

\u611f\u8c22\u9605\u8bfb！<\/p>\n","protected":false},"excerpt":{"rendered":"

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