Windows下实现C语言Socket通讯TCP传送结构体信息

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Windows下实现C语言Socket通讯

<TCP传送结构体信息>
首先socket通信的步骤：

                				 三次握手协议

							  三次握手协议

代码

服务器端

#include <stdio.h>
#include <WinSock2.h>
#include <windows.h>
#pragma comment(lib, "ws2_32.lib")  //加载 ws2_32.dll
#define BUF_SIZE 100
#pragma warning(disable:4996)
struct MyStruct
{
	char name[10];
	char age[3];
	char title[100];
}userMsg;
int main(){
	//初始化DLL
	WSADATA wsaData;
	WSAStartup(MAKEWORD(2, 2), &wsaData);
	//向服务器发起请求
	SOCKADDR_IN sockAddr;
	memset(&sockAddr, 0, sizeof(sockAddr));  //每个字节都用0填充
	sockAddr.sin_family = PF_INET;
	sockAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
	sockAddr.sin_port = htons(1234);

	char bufSend[BUF_SIZE] = { 0 };
	char bufRecv[BUF_SIZE] = { 0 };
	
	for (int i = 0; i < 5; i++)
	{
		//创建套接字
		SOCKET sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
		connect(sock, (SOCKADDR*)&sockAddr, sizeof(SOCKADDR));


		//获取用户输入的字符串
		//printf("Input a string: ");
		//gets(bufSend);
		printf("请输入姓名: ");
		gets(userMsg.name);
		printf("请输入年龄: ");
		gets(userMsg.age);
		printf("请输入消息: ");
		gets(userMsg.title);
		//printf("name:%s;age:%s;title:%s\n", userMsg.name, userMsg.age, userMsg.title);
		//memcpy(userMsg.name, "100001", sizeof("100001"));
		//memcpy(userMsg.age, "123", sizeof("123"));
		//memcpy(userMsg.title, "Rock", sizeof("Rock"));
		
		memcpy(userMsg.name, userMsg.name, sizeof(userMsg.name));
		memcpy(userMsg.age, userMsg.age, sizeof(userMsg.age));
		memcpy(userMsg.title, userMsg.title, sizeof(userMsg.title));

		//并发送给服务器
		//send(sock, bufSend, strlen(bufSend), 0);
		send(sock, (char *)&userMsg, sizeof(userMsg), 0);


		//接收服务器传回的数据
		recv(sock, bufRecv, BUF_SIZE, 0);
		//输出接收到的数据
		memcpy(&userMsg, bufRecv, sizeof(userMsg));
		//printf("%s\n %s\n %s\n", userMsg.name, userMsg.age, userMsg.title);
		printf("name:%s;age:%s;title:%s\n", userMsg.name, userMsg.age, userMsg.title);
		//printf("Message form server: %s\n", bufRecv);

		memset(bufSend, 0, BUF_SIZE);  //重置缓冲区
		memset(bufRecv, 0, BUF_SIZE);  //重置缓冲区
		closesocket(sock);  //关闭套接字
	}
	WSACleanup();  //终止使用 DLL
	return 0;
}

#include <stdio.h>
#include <winsock2.h>
#pragma comment (lib, "ws2_32.lib")  //加载 ws2_32.dll
#define BUF_SIZE 100

struct MyStruct
{
	char name[10];
	char age[3];
	char title[100];
}userMsg; 

int main(){
	WSADATA wsaData;
	WSAStartup(MAKEWORD(2, 2), &wsaData);
	//创建套接字
	SOCKET servSock = socket(AF_INET, SOCK_STREAM, 0);
	//绑定套接字
	SOCKADDR_IN sockAddr;
	memset(&sockAddr, 0, sizeof(sockAddr));  //每个字节都用0填充
	sockAddr.sin_family = PF_INET;  //使用IPv4地址
	sockAddr.sin_addr.s_addr = inet_addr("127.0.0.1");  //具体的IP地址
	sockAddr.sin_port = htons(1234);  //端口
	bind(servSock, (SOCKADDR*)&sockAddr, sizeof(SOCKADDR));
	//进入监听状态
	listen(servSock, 20);
	//接收客户端请求
	SOCKADDR clntAddr;
	int nSize = sizeof(SOCKADDR);
	char buffer[BUF_SIZE] = { 0 };  //缓冲区
	char bufRecv[BUF_SIZE] = { 0 };
	for (int i = 0; i < 5; i++)
	{
		SOCKET clntSock = accept(servSock, (SOCKADDR*)&clntAddr, &nSize);
		//接收客户端发来的数据
		int strLen = recv(clntSock, buffer, BUF_SIZE, 0);  
		//将数据原样返回
		send(clntSock, buffer, strLen, 0);  
		//输出接收到的数据
		memcpy(&userMsg, buffer, sizeof(userMsg));
		//printf("%s\n %s\n %s\n", userMsg.name, userMsg.age, userMsg.title);
		printf("name:%s;age:%s;title:%s\n", userMsg.name, userMsg.age, userMsg.title);
		//关闭套接字
		closesocket(clntSock);
		//重置缓冲区
		memset(buffer, 0, BUF_SIZE);  
	}
	//关闭套接字
	closesocket(servSock);
	//终止 DLL 的使用
	WSACleanup();
	return 0;



}