//服务器端:
#include "winsock2.h"
#include <string>
#pragma comment(lib, "ws2_32.lib") //附加依赖lib库 也可以在属性中设置
#include<iostream>
using namespace std;
//数据库相关
int main()
{
WSADATA wsd; //WSADATA变量
SOCKET sServer; //服务器套接字 用来监听
SOCKET sClient; //客户端套接字 连接
SOCKADDR_IN addrServ;; //服务器地址
const int BUF_SIZE = 500;
char buf[BUF_SIZE]; //接收数据缓冲区
char sendBuf[BUF_SIZE];//返回给客户端得数据
int retVal; //返回值
//初始化套结字动态库 代码健壮
if (WSAStartup(MAKEWORD(2, 2), &wsd) != 0)
{
cout << "WSAStartup failed!" << endl;
return 1;
}
//开始创建服务端socket
//创建套接字 AF_INET:ipv4 SOCK_STREAM:使用tcp
sServer = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (INVALID_SOCKET == sServer)
{
cout << "socket failed!" << endl;
WSACleanup();//释放套接字资源;
return -1;
}
//服务器套接字地址
addrServ.sin_family = AF_INET;//IPv4
addrServ.sin_port = htons(4999);//设置端口 建议大于1024
addrServ.sin_addr.s_addr = INADDR_ANY; //表示接受任何客户端的请求
//绑定套接字 绑定服务端socket 和 端口
retVal = bind(sServer, (LPSOCKADDR)&addrServ, sizeof(SOCKADDR_IN));
if (SOCKET_ERROR == retVal)
{
cout << "bind failed!" << endl;
closesocket(sServer); //关闭套接字
WSACleanup(); //释放套接字资源;
return -1;
}
//开始监听
retVal = listen(sServer, 10);
if (SOCKET_ERROR == retVal)
{
cout << "listen failed!" << endl;
closesocket(sServer); //关闭套接字
WSACleanup(); //释放套接字资源;
return -1;
}
//接受客户端请求
sockaddr_in addrClient;
int addrClientlen = sizeof(addrClient);
sClient = accept(sServer, (sockaddr FAR*)&addrClient, &addrClientlen);//使用sClient进行数据收发
if (INVALID_SOCKET == sClient)
{
cout << "accept failed!" << endl;
closesocket(sServer); //关闭套接字
WSACleanup(); //释放套接字资源;
return -1;
}
while (1)
{
//接收客户端数据
ZeroMemory(buf, BUF_SIZE);//初始化 buf 用 0填充
ZeroMemory(sendBuf, BUF_SIZE);
retVal = recv(sClient, buf, BUF_SIZE, 0);
if (SOCKET_ERROR == retVal)
{
cout << "recv failed!" << endl;
closesocket(sServer); //关闭套接字
closesocket(sClient); //关闭套接字
WSACleanup(); //释放套接字资源;
return -1;
}
cout << "set:" << buf << endl;
//向客户端发送数据
cout << "go:";
cin >> sendBuf;
send(sClient, sendBuf, strlen(sendBuf), 0);
}
//关闭连接 释放资源
closesocket(sServer); //关闭套接字
closesocket(sClient); //关闭套接字
WSACleanup(); //释放套接字资源;
system("pause");
return 0;
}
//客户端:
#include "winsock2.h"
#include <string>
#include <iostream>
#pragma comment(lib, "ws2_32.lib")
using namespace std;
int main()
{
WSADATA wsd; //WSADATA变量
SOCKET sHost; //客户端套接字
SOCKADDR_IN servAddr; //服务器地址
const int BUF_SIZE = 500;
char buf[BUF_SIZE]; //接收数据缓冲区
char bufRecv[BUF_SIZE];
int retVal; //返回值
//初始化套结字动态库
if (WSAStartup(MAKEWORD(2, 2), &wsd) != 0)
{
cout << "WSAStartup failed!" << endl;
return -1;
}
//创建套接字
sHost = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (INVALID_SOCKET == sHost)
{
cout << "socket failed!" << endl;
WSACleanup();//释放套接字资源
return -1;
}
servAddr.sin_family = AF_INET;
//如果编译通不过 属性 c++ 常规 sdl 改成否
char inte[20];
scanf("%s",inte);
servAddr.sin_addr.s_addr = inet_addr(inte);//设置服务端地址 这里表示本机
servAddr.sin_port = htons((short)4999);
int nServAddlen = sizeof(servAddr);
//连接服务器
retVal = connect(sHost, (LPSOCKADDR)&servAddr, sizeof(servAddr));
if (SOCKET_ERROR == retVal)
{
cout << "connect failed!" << endl;
closesocket(sHost); //关闭套接字
WSACleanup(); //释放套接字资源
return -1;
}
//成功建立连接 可以开始通信了
while (1)
{
//向服务器发送数据
ZeroMemory(buf, BUF_SIZE);
cout << "go:";
cin >> buf;
// 包装数据: 指令标记 : 内容
// 1-100
// 1:登录 username - passeord 2:注册 3 查询 4 更新数据库 5 .....
/*
struct info
{
int flag; 指令
char* username;
char* password;
其他结构体
}
*/
retVal = send(sHost, buf, strlen(buf), 0);
if (SOCKET_ERROR == retVal)
{
cout << "send failed!" << endl;
closesocket(sHost); //关闭套接字
WSACleanup(); //释放套接字资源
return -1;
}
ZeroMemory(bufRecv, BUF_SIZE);
recv(sHost, bufRecv, BUF_SIZE, 0); // 接收服务器端的数据
cout << endl << "set:" << bufRecv;
cout << "\n";
}
closesocket(sHost); //关闭套接字
WSACleanup(); //释放套接字资源
system("pause");
return 0;
}
用dev-c++编译socket代码时需要更改 工具-编译器选项 的第二栏为-lwsock32
[C++] C++socket套接字网络通讯实例
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转载自www.cnblogs.com/56843268qqq/p/12335002.html
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