#define WIN32_LEAN_AND_MEAN
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include<windows.h>
#include<WinSock2.h>
#include<stdio.h>
#pragma comment(lib,"ws2_32.lib")
int main()
{
//启动windows socket 2.x 环境
WORD ver = MAKEWORD(2, 2);
WSADATA dat;
WSAStartup(ver, &dat);
//--用socket API建立简易TCP服务端
// 1、建立一个socket 套接字
//AF_INET ipv4网络 , SOCK_STREAM 对象为数据流,
SOCKET _sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
// 2、绑定用于接受客户端连接的网络端口
sockaddr_in _sin = {};
_sin.sin_family = AF_INET;
_sin.sin_port = htons(4567);
_sin.sin_addr.S_un.S_addr = INADDR_ANY;//inet_addr("127.0.0.1");
if (SOCKET_ERROR == bind(_sock, (sockaddr*)&_sin, sizeof(_sin)))
{
printf("ERROR,绑定用于接受客户端连接的网络端口错误... \n");
}
else {
printf("绑定端口成功... \n");
}
// 3、listen监听网络端口
if (SOCKET_ERROR == listen(_sock, 5))
{
printf("ERROR,listen监听网络端口错误... \n");
}
else {
printf("listen监听网络端口成功... \n");
}
// 4、accept 等待接受客户端连接
sockaddr_in clientAddr = {};
int nAddrLen = sizeof(clientAddr);
SOCKET _cSock = INVALID_SOCKET;
while (true)
{
_cSock = accept(_sock, (sockaddr*)&clientAddr, &nAddrLen);
if (INVALID_SOCKET == _cSock)
{
printf("错误,接收到无效客户端SOCKET... \n");
}
printf("新客户端加入: IP= %s \n",inet_ntoa(clientAddr.sin_addr));
// 5、send 向客户端发送一条数据
char msgBuf[] = "Hello,I'm Server.";
send(_cSock, msgBuf, strlen(msgBuf) + 1, 0);
}
//6、关闭套接字 closesocket
closesocket(_sock);
//清除windows socket环境
WSACleanup();
return 0;
}