服务端:
#include "pch.h"
#include<iostream>
#include<WinSock2.h>
#include <Ws2tcpip.h>
#define CONNECT_NUM_MAX 10
#pragma comment(lib, "ws2_32.lib")
using namespace std;
int main()
{
//加载套接字库
WSADATA wsaData;
int iRet = 0;
iRet = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (iRet != 0)
{
cout << "WSAStartup(MAKEWORD(2, 2), &wsaData) execute failed!" << endl;;
return -1;
}
if (2 != LOBYTE(wsaData.wVersion) || 2 != HIBYTE(wsaData.wVersion))
{
WSACleanup();
cout << "WSADATA version is not correct!" << endl;
return -1;
}
//创建套接字
SOCKET serverSocket = socket(AF_INET, SOCK_STREAM, 0);
if (serverSocket == INVALID_SOCKET)
{
cout << "serverSocket = socket(AF_INET, SOCK_STREAM, 0) execute failed!" << endl;
return -1;
}
//初始化服务器地址族变量
SOCKADDR_IN addrSrv;
addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
addrSrv.sin_family = AF_INET;
addrSrv.sin_port = htons(6000);
//绑定
iRet = bind(serverSocket, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR));
if (iRet == SOCKET_ERROR)
{
cout << "bind(serverSocket, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR)) execute failed!" << endl;
return -1;
}
//监听
iRet = listen(serverSocket, CONNECT_NUM_MAX);
if (iRet == SOCKET_ERROR)
{
cout << "listen(serverSocket, 10) execute failed!" << endl;
return -1;
}
else
{
cout << "Server is listening on " << addrSrv.sin_addr.S_un.S_addr << ":" << addrSrv.sin_port << "." << endl;
}
//等待连接_接收_发送
SOCKADDR_IN clientAddr;
int len = sizeof(SOCKADDR);
while (1)
{
SOCKET connSocket = accept(serverSocket, (SOCKADDR*)&clientAddr, &len);
if (connSocket == INVALID_SOCKET)
{
cout << "accept(serverSocket, (SOCKADDR*)&clientAddr, &len) execute failed!" << endl;
return -1;
}
else
{
cout << "Connection established! Waiting for messages." << endl;
}
int x = 0;
while (true)
{
//接收消息
char recvBuf[100];
int sig = recv(connSocket, recvBuf, 100, 0);
//没有连接时断开
if (sig <= 0)
{
printf("Error: Lost connection!\n");
break;
}
printf("%s\n", recvBuf);
//发送消息
char sendBuf[100];
//sprintf_s(sendBuf, "Welcome %s", inet_ntoa(clientAddr.sin_addr));
char str[INET_ADDRSTRLEN];
sprintf_s(sendBuf, "Welcome! client from %s %d!", inet_ntop(AF_INET, &clientAddr.sin_addr, str, sizeof(str)), x);
send(connSocket, sendBuf, strlen(sendBuf) + 1, 0);
x++;
}
//关闭连接
closesocket(connSocket);
}
system("pause");
return 0;
}