udp 练习

最新推荐文章于 2025-01-04 12:53:03 发布

原创最新推荐文章于 2025-01-04 12:53:03 发布 · 311 阅读

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可以实现双方持续通信了

udp服务器端

#include<stdio.h>
#include<iostream>
#include<WinSock2.h>
#include<Windows.h>
#pragma comment (lib,"WS2_32.lib")

using namespace std;

int main()
{
   WSADATA wsaData;
   SOCKET RecvSocket;
   sockaddr_in recvaddr;
   int port = 5150;
   char recvcharbuf[128];
   int recvcharbuflen = 128;
   char sendcharbuf[128];
   int sendcharbuflen = 128;
   SOCKADDR_IN senderaddr;
   int senderaddrsize = sizeof(senderaddr);

   if ((WSAStartup(MAKEWORD(2, 2), &wsaData)) != 0)
   {
       cout << "wsastarup error" << endl;
   }
   cout << "wsastarup successful" << endl;
   if ((RecvSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == INVALID_SOCKET)//看准括号的个数
   {
       cout << "socket failed" << endl;
       return 0;
   }
   cout << "recvsock socker successful" << endl;
   recvaddr.sin_family = AF_INET;
   recvaddr.sin_port = htons(port);
   recvaddr.sin_addr.S_un.S_addr =INADDR_ANY;

   if (bind(RecvSocket, (LPSOCKADDR)&recvaddr, sizeof(recvaddr)) == SOCKET_ERROR)
   {
       cout << "bind error" << endl;
       return 0;
   }

   /*if (::bind(RecvSocket, (LPSOCKADDR)&recvaddr, sizeof(recvaddr)) == SOCKET_ERROR)
   {
       printf("Failed bind() \n");
       return 0;
   }
   */
   cout << "bind successful" << endl;
   while (true)
   {
       if ((recvfrom(RecvSocket, recvcharbuf, recvcharbuflen, 0, (SOCKADDR*)&senderaddr, &senderaddrsize)) == SOCKET_ERROR)//recefrom主要最后一个参数，是引用
       {
           cout << "revcfrom error" << endl;
       }
       cout << "recv successful:\n" << recvcharbuf << endl;
       cout << "输入数据" << endl;
       cin >> sendcharbuf;
       if ((sendto(RecvSocket, sendcharbuf, sendcharbuflen, 0, (SOCKADDR*)&senderaddr, sizeof(senderaddr))) == SOCKET_ERROR)
       {
           cout << "send error" << endl;
           return 0;
       }
       cout << "send successful" << endl;
   }
   closesocket(RecvSocket);
   WSACleanup();
   return 0;
}

udp客户端

#include<stdio.h>
#include<iostream>
#include<WinSock2.h>
#include<Windows.h>
#pragma comment (lib,"WS2_32.lib")

using namespace std;

int main()
{
   WSADATA wsaData;
   SOCKADDR_IN senderaddr;
   int senderaddrsize = sizeof(senderaddr);
   if ((WSAStartup(MAKEWORD(2, 2), &wsaData)) != 0)
   {
       cout << "wsastarup field" << endl;
       return 0;
   }
   cout << "wsastarup successful" << endl;
   SOCKET sendsock;
   sendsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
   if (sendsock == INVALID_SOCKET)
   {
       cout << "sendsock sock failed" << endl;
       return 0;
   }
   SOCKADDR_IN recvrAddr;
   recvrAddr.sin_family = AF_INET;
   recvrAddr.sin_port = htons(5150);
   recvrAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
   char sendbuf[128];
   int sendbuflen = 128;
   char recvbuf[128];
   int recvbuflen = 128;
   while (true)
   {
       cout << "输入数据" << endl;
       cin >> sendbuf;
       sendto(sendsock, sendbuf, sendbuflen, 0, (SOCKADDR*)&recvrAddr, sizeof(recvrAddr));

       cout << "接收数据" << endl;
       if ((recvfrom(sendsock, recvbuf, recvbuflen, 0, (SOCKADDR*)&senderaddr, &senderaddrsize)) == SOCKET_ERROR)//recefrom主要最后一个参数，是引用
       {
           cout << "revcfrom error" << endl;
       }
       cout << "recv successful:\n" << recvbuf << endl;
   }
   closesocket(sendsock);
   WSACleanup();
   return 0;
}