windows环境下C语言socket编程

最近由于实验需要，要求写一个c程序与java程序通信的软件，为了测试首先写了一个windows环境下c语言的socket（tcp）通信程序。

首先socket通信的步骤：

   图一     socket通信步骤（转载)

                                            图二 三次握手协议（转载）

  图三    三次握手协议（转载）

代码  服务器端

#include 
#include 
#pragma comment(lib,"ws2_32.lib")

int main(int argc, char* argv[])
{
	//初始化WSA
	WORD sockVersion = MAKEWORD(2, 2);
	WSADATA wsaData;
	if (WSAStartup(sockVersion, &wsaData) != 0)
	{
		return 0;
	}

	//创建套接字
	SOCKET slisten = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	if (slisten == INVALID_SOCKET)
	{
		printf("socket error !");
		return 0;
	}

	//绑定IP和端口
	struct sockaddr_in sin;
	sin.sin_family = AF_INET;
	sin.sin_port = htons(8888);
	sin.sin_addr.S_un.S_addr = INADDR_ANY;
	if (bind(slisten, (LPSOCKADDR)&sin, sizeof(sin)) == SOCKET_ERROR)
	{
		printf("bind error !");
	}

	//开始监听
	if (listen(slisten, 5) == SOCKET_ERROR)
	{
		printf("listen error !");
		return 0;
	}

	//循环接收数据
	SOCKET sClient;
	struct sockaddr_in remoteAddr;
	int nAddrlen = sizeof(remoteAddr);
	//char revData[255];
	printf("等待连接...\n");
	sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);
	while (1)
	{
		char revData[255];
		//printf("等待连接...\n");
		//sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);
		if (sClient == INVALID_SOCKET)
		{
			printf("accept error !");
			continue;
		}
		printf("接受到一个连接：%s \r\n", inet_ntoa(remoteAddr.sin_addr));

		//接收数据
		int ret = recv(sClient, revData, 255, 0);
		//printf(ret);
		if (ret > 0)
		{
			revData[ret] = 0x00;
			printf(revData);
		}
		//发送数据
		char * sendData = "你好，TCP客户端！\n";
		send(sClient, sendData, strlen(sendData), 0);
	}
		closesocket(sClient);
	closesocket(slisten);
	WSACleanup();
	return 0;
}

代码   客户端

#include 
#include 
#pragma comment(lib,"ws2_32.lib")
#include 
int main(int argc, char* argv[])
{
	WORD sockVersion = MAKEWORD(2, 2);
	WSADATA data;
	if (WSAStartup(sockVersion, &data) != 0)
	{
		return 0;
	}

	SOCKET sclient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	if (sclient == INVALID_SOCKET)
	{
		printf("invalid socket !");
		return 0;
	}

	struct sockaddr_in serAddr;
	serAddr.sin_family = AF_INET;
	serAddr.sin_port = htons(8888);
	serAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
	if (connect(sclient, (struct sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)
	{
		printf("connect error !");
		closesocket(sclient);
		return 0;
	}
	for (int i = 0; i < 1000; i++)
	{

		char * sendData = "csi接收  二进制文件未解析\n";
		send(sclient, sendData, strlen(sendData), 0);
		char recData[255];
		/*int ret = recv(sclient, recData, 255, 0);
		if (ret > 0)
		{
	
			recData[ret] = 0x00;
			//printf(recData);
			printf("%d%s",i,recData);
		}
		*/
	}
	closesocket(sclient);
	WSACleanup();
	return 0;
}

后续会给出c程序与java程序通信的例子。