VC编程之Windows下C语言的Socket编程例子（TCP和UDP)-职坐标

VC编程之Windows下C语言的Socket编程例子（TCP和UDP)

小标 2018-11-15 来源：阅读 1983 评论 0

摘要：本文主要向大家介绍了VC编程之Windows下C语言的Socket编程例子（TCP和UDP)，通过具体的内容向大家展示，希望对大家学习VC编程有所帮助。

本文主要向大家介绍了VC编程之Windows下C语言的Socket编程例子（TCP和UDP)，通过具体的内容向大家展示，希望对大家学习VC编程有所帮助。

VC编程之Windows下C语言的Socket编程例子（TCP和UDP)

这是一个简单的Socket程序例子，开发环境是vc6：
新建工程 win32-控制台程序

首先是TCP
server端：

#include "stdafx.h"
#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
   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;
   sockaddr_in remoteAddr;
   int nAddrlen = sizeof(remoteAddr);
   char revData[255];
   while (true)
   {
       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);
       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;
}

client端：

#include "stdafx.h"
#include
#include

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

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;
   }

   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, (sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)
   {
       printf("connect error !");
       closesocket(sclient);
       return 0;
   }
   char * sendData = "你好，TCP服务端，我是客户端!\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);
   }
   closesocket(sclient);
   WSACleanup();
   return 0;
}

然后是UDP
server端：

#include "stdafx.h"
#include
#include

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

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

   SOCKET serSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
   if(serSocket == INVALID_SOCKET)
   {
       printf("socket error !");
       return 0;
   }

   sockaddr_in serAddr;
   serAddr.sin_family = AF_INET;
   serAddr.sin_port = htons(8888);
   serAddr.sin_addr.S_un.S_addr = INADDR_ANY;
   if(bind(serSocket, (sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)
   {
       printf("bind error !");
       closesocket(serSocket);
       return 0;
   }

   sockaddr_in remoteAddr;
   int nAddrLen = sizeof(remoteAddr);
   while (true)
   {
       char recvData[255];
       int ret = recvfrom(serSocket, recvData, 255, 0, (sockaddr *)&remoteAddr, &nAddrLen);
       if (ret > 0)
       {
           recvData[ret] = 0x00;
           printf("接受到一个连接：%s \r\n", inet_ntoa(remoteAddr.sin_addr));
           printf(recvData);
       }

       char * sendData = "一个来自服务端的UDP数据包\n";
       sendto(serSocket, sendData, strlen(sendData), 0, (sockaddr *)&remoteAddr, nAddrLen);

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

client端：

#include "stdafx.h"
#include
#include

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

int main(int argc, char* argv[])
{
   WORD socketVersion = MAKEWORD(2,2);
   WSADATA wsaData;
   if(WSAStartup(socketVersion, &wsaData) != 0)
   {
       return 0;
   }
   SOCKET sclient = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

   sockaddr_in sin;
   sin.sin_family = AF_INET;
   sin.sin_port = htons(8888);
   sin.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
   int len = sizeof(sin);

   char * sendData = "来自客户端的数据包.\n";
   sendto(sclient, sendData, strlen(sendData), 0, (sockaddr *)&sin, len);

   char recvData[255];
   int ret = recvfrom(sclient, recvData, 255, 0, (sockaddr *)&sin, &len);
   if(ret > 0)
   {
       recvData[ret] = 0x00;
       printf(recvData);
   }

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

测试是可以通过的，就是不知道有那些地方可以改进，那些地方是可以删除的，如果有人知道可以给我留言。

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