【C++】Winsock套接字编程，简单的socket通信代码（客户
端、服务端）
上接前两章
操作系统：Windows10
开发环境：VS2015
服务端代码：
// TCPserver.cpp : 定义控制台应⽤程序的⼊⼝点。
//
#include "stdafx.h"
#include <iostream>
#include <cstdlib>
#include <WinSock2.h>
#include <WS2tcpip.h>
#pragma comment(lib,"ws2_32.lib")
using namespace std;
#define SERVERIP "192.168.3.23"//IP地址
#define SERVERPORT 5050//端⼝号
int main()
{
WORD verision = MAKEWORD(2, 2);
WSADATA lpData;
int intEr = WSAStartup(verision, &lpData);//指定winsock版本并初始化
if (intEr != 0)
{
cout << "winsock init failed!" << endl;
return 0;
}
else
cout << "winsock init success!" << endl;
//创建侦听socket
SOCKET listenScok = socket(AF_INET, SOCK_STREAM, 0);
if (listenScok == INVALID_SOCKET)
{
cout << "socket error" << endl;
return 0;
}
else
cout << "create socket success" << endl;
sockaddr_in hostAddr;
hostAddr.sin_family = AF_INET;
hostAddr.sin_port = htons(SERVERPORT);//转换成⽹络字节序
//hostAddr.sin_addr.S_un.S_addr = inet_addr(SERVERIP);//转换成⽹络字节序
//cout << "net IP:" << hostAddr.sin_addr.S_un.S_addr << endl;
/*
inet_addr()版本太低，被弃⽤使⽤inet_pton(协议族，字符串IP地址，void⽬标in_addr*)
头⽂件：WS2tcpip.h
*/
in_addr addr;
inet_pton(AF_INET, SERVERIP, (void*)&addr);
hostAddr.sin_addr = addr;
cout << "ip:" << addr.S_un.S_addr << endl;
//侦听套接字listenSock绑定本机地址信息
int err;
err = bind(listenScok, (struct sockaddr*)&hostAddr, sizeof(sockaddr));
if (err != 0)
{
cout << "hostAddr bind failed!" << endl;
return 0;
}
err = listen(listenScok, 3);
if (err != 0)
{
cout << "listen socket listen failed!" << endl;
return 0;
}
cout << "" << endl;
int no = 1;
while (true)
{
sockaddr_in clientAddr;
int len = sizeof(struct sockaddr);//必须指定长度，否则会导致accept返回10014错误
//accept会循环等待客户端连接
SOCKET clientSock = accept(listenScok, (struct sockaddr*)&clientAddr, &len);
if (clientSock == INVALID_SOCKET)
{
cout << "accept failed!" << endl;
cout << WSAGetLastError() << endl;
system("pause");
return 0;
}
char buf[1024] = "\0";
int buflen = recv(clientSock, buf, 1024, 0);
if (buflen == SOCKET_ERROR)
{
cout << "recv failed!" << endl;
return 0;
}
cout << "recieve data" << no++ << ": " << buf << endl;
err = shutdown(clientSock, 2);
if (err == SOCKET_ERROR)
{
cout << "shutdown failed!" << endl;
return 0;
}
}
err = shutdown(listenScok, 2);
if (err == SOCKET_ERROR)
{
cout << "shutdown failed!" << endl;
return 0;
}
err = closesocket(listenScok);
if (err == SOCKET_ERROR)
{
cout << "closesocket failed!" << endl;
return 0;
}
if (WSACleanup() != 0)
{
cout << "WSACleanup failed!" << endl;
return 0;
}
system("pause");
return 0;
}
客户端代码：
// TCPclient.cpp : 定义控制台应⽤程序的⼊⼝点。
//
#include "stdafx.h"
#include <iostream>
#include <cstdlib>
#include <WinSock2.h>
#include <WS2tcpip.h>
#pragma comment(lib,"ws2_32.lib")
using namespace std;
#define SERVERIP "192.168.3.23"
#define SERVERPORT 5050
int main()
{
WORD sockVersion = MAKEWORD(2, 2);
WSADATA initData;
int err = WSAStartup(sockVersion, &initData);
if (err != 0)
cout << "init Failed!" << endl;
while (true)
{
//创建⼀个套接字，参数列表（地址族TCP、UDP；套接字协议类型TCP；套接字使⽤的特定协议0⾃动指定)  SOCKET mysocket = socket(AF_INET, SOCK_STREAM, 0);
if (mysocket == INVALID_SOCKET)
{
cout << "create socket failed!" << endl;
return 0;
}
sockaddr_in hostAddr;
hostAddr.sin_family = AF_INET;
hostAddr.sin_port = htons(SERVERPORT);
in_addr addr;
inet_pton(AF_INET, SERVERIP, (void*)&addr);
hostAddr.sin_addr = addr;
cout << "ip:" << addr.S_un.S_addr << endl;
SOCKET conSock = socket(AF_INET, SOCK_STREAM, 0);
if (conSock == INVALID_SOCKET)
{
cout << "conSock failed" << endl;
system("pause");
return 0;
}
err = connect(conSock, (sockaddr*)&hostAddr, sizeof(sockaddr));
if (err == INVALID_SOCKET)
{
{
cout << "connect failed!" << endl;
system("pause");
简单好玩的编程代码复制return 0;
}
char buf[1024] = "\0";
cout << "input data: ";
cin >> buf;
err = send(conSock, buf, strlen(buf), 0);  if (err == SOCKET_ERROR)
{
cout << "send failed!" << endl;
system("pause");
return 0;
}
if (closesocket(conSock) != 0)
{
cout << "closesocket failed!" << endl;  system("pause");
return 0;
}
}
WSACleanup();
system("pause");
return 0;
}

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