tcpserver.cpp

WinSocket各种阻塞非阻塞模式的简单例子都已通过调试适合网络编程初学者

#include "../comm/initsock.h"
#include <stdio.h>

CInitSock initSock;

int main()
{
	//创建套接字
	SOCKET sListen = ::socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	if (sListen == INVALID_SOCKET) //执行失败返回INVALID_SOCKET(-1)
	{
		printf("Failed socket()\n");
		return 0;
	}

	//填充sockaddr_in结构
	sockaddr_in sin;
	sin.sin_family = AF_INET;
	sin.sin_port = htons(4567);
	sin.sin_addr.S_un.S_addr = INADDR_ANY;

	//绑定这个套接字到一个本地地址
	if (::bind(sListen, (LPSOCKADDR)&sin, sizeof(sin)) == SOCKET_ERROR)
	{
		printf("Failed bind()\n");
		return 0;
	}
	
	//进入监听模式
	if (::listen(sListen, 2) == SOCKET_ERROR)
	{
		printf("Failed listen()\n");
		return 0;
	}

	//循环接受客户的连接请求
	sockaddr_in remoteAddr;
	int nAddrLen = sizeof(remoteAddr);
	SOCKET sClient;
	char szText[] = "TCP Server Demo!\r\n";
	char buff[1024] = {0};
	while (TRUE)
	{
		//接受新连接
		sClient = ::accept(sListen, (SOCKADDR*)&remoteAddr, &nAddrLen);
		if (sClient == INVALID_SOCKET)
		{
			printf("Failed accept()\n");
			continue;
		}

		printf(" 接收到一个连接:%s\r\n", inet_ntoa(remoteAddr.sin_addr));
		
		//向客户端发送数据
		::send(sClient, szText, strlen(szText), 0);

//		::recv(sClient, buff, 1024, 0);
//		printf("%s", buff);
		
		//关闭通客户端的连接
		::closesocket(sClient);
	}

	//关闭监听套接字
	::closesocket(sListen);

	return 0;
}