Socket编程简易测试socket UDP

最新推荐文章于 2025-10-14 11:52:38 发布

原创最新推荐文章于 2025-10-14 11:52:38 发布 · 757 阅读

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#编程 #socket #UDP

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本文介绍了一个简单的 UDP Socket 测试程序，包括服务器端和客户端的实现。该程序使用 C++ 编写，通过 Windows Sockets API 实现 UDP 数据包的发送与接收。适用于初学者学习 Socket 编程。

简易测试程序,用于测试使用socket 实现UDP.

程序结构简单,仅有相关函数的使用.旨在明确新手对于socket的学习方向.

服务器程序:

// SocketUDPSrv.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <winsock2.h>
#include <windows.h>
#include <iostream>
using namespace std;
#pragma comment(lib,"ws2_32.lib")


int main(int argc, char* argv[])
{
	//Initialize ws2_32.lib
	WSADATA wsaData;
	WORD wVerionRequested;
	int ret;

	wVerionRequested = MAKEWORD(2,2);
	ret = WSAStartup(wVerionRequested,&wsaData);
	if (ret == SOCKET_ERROR)
	{
		::MessageBox(NULL,"WSAStartup Error","demon",MB_OK | MB_ICONERROR);
		return -1;
	}
	cout << "Initialize ws2_32.lib...done..." << endl;
	
	
	SOCKET srv_socket;
	srv_socket = socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
	if (srv_socket == SOCKET_ERROR)
	{
		::MessageBox(NULL,"socket Error","demon",MB_OK | MB_ICONERROR);
		return -1;
	}
	cout << "create socket...done..." << endl;

	sockaddr_in srv_addr;
	srv_addr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
	srv_addr.sin_family =  AF_INET;
	srv_addr.sin_port = htons(6000);
	ret = bind(srv_socket,(SOCKADDR *)&srv_addr,sizeof(srv_addr));
	if (ret == SOCKET_ERROR)
	{
		cout << WSAGetLastError()<<endl;
		::MessageBox(NULL,"bind Error","demon",MB_OK | MB_ICONERROR);
		return -1;
	}
	cout << "bind...done..." << endl;

	cout << "receive data...";
	
	char recv_buf[256];
	sockaddr_in from_addr;
	int fromlen = sizeof(SOCKADDR);
	//ret = recvfrom(srv_socket,recv_buf,256,0,(SOCKADDR *)&from_addr,&fromlen);
	int i = 0;
	while(i < 3){
		//ret = recvfrom(srv_socket,recv_buf,256,0,NULL,NULL);
		ret = recvfrom(srv_socket,recv_buf,256,0,(SOCKADDR *)&from_addr,&fromlen);

		if (ret == SOCKET_ERROR)
		{
			cout << WSAGetLastError()<<endl;
			::MessageBox(NULL,"recvfrom Error","demon",MB_OK | MB_ICONERROR);
			return -1;
		}
		cout << recv_buf << endl;
		i++;
	}

	cout <<"done...\n";

	closesocket(srv_socket);
	WSACleanup();
	return 0;
}

客户端程序:

// SocketUDPClient.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <winsock2.h>
#include <windows.h>
#include <iostream>
using namespace std;
#pragma comment(lib,"ws2_32.lib")

int main(int argc, char* argv[])
{
	WSADATA wsaData;
	WORD wVerionRequested;
	int ret;
	
	wVerionRequested = MAKEWORD(2,2);
	ret = WSAStartup(wVerionRequested,&wsaData);
	if (ret == SOCKET_ERROR)
	{
		::MessageBox(NULL,"WSAStartup Error","demon",MB_OK | MB_ICONERROR);
		return -1;
	}

	SOCKET client_socket;
	client_socket = socket(AF_INET,SOCK_DGRAM,0);
	if (client_socket == SOCKET_ERROR)
	{
		::MessageBox(NULL,"socket Error","demon",MB_OK | MB_ICONERROR);
		return -1;
	}

//²»ÐèÒªbind

	//·þÎñÆ÷¶ËµÄµØÖ·ºÍ¶Ë¿Ú
	sockaddr_in addrSrv;
	addrSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
	addrSrv.sin_family  = AF_INET;
	addrSrv.sin_port = htons(6000);

	char send_buf[256];
	sprintf(send_buf,"Hello.....");
	ret = sendto(client_socket,send_buf,strlen(send_buf) + 1,0,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));
	if (ret == SOCKET_ERROR)
	{
		cout << WSAGetLastError() << endl;
		::MessageBox(NULL,"sendto Error","demon",MB_OK | MB_ICONERROR);
		return -1;
	}

	cout << "done..." << endl;
	closesocket(client_socket);
	WSACleanup();
	return 0;
}