一个socket小程序

最新推荐文章于 2025-12-11 23:05:13 发布

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#socket #server #iostream #stream #tcp #windows

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博主此前对C/C++下的socket编程不太熟悉，此次完成了一个简单的server/client程序。文中给出了服务器和客户端的代码，包含初始化Windows Socket库、创建socket、绑定、监听、连接等操作，使用了TCP协议。

一直对c/c++下的socket编程必是很熟悉，今天终于完成了一个很简单的server/client程序

服务器：
#include <iostream>
#include <Winsock2.h>
#pragma comment( lib, "Ws2_32.lib" )

using namespace std;

const int MY_ERROR = -1;

int main( )
{

    WSADATA wsaData;

     //初始化Windows Socket 库
     if( WSAStartup(MAKEWORD( 2, 2 ), &wsaData)!=0 )
    {
        cout<<"Error in WSAStartup"<<endl;

        return MY_ERROR;
     }

    //创建一个socket->bind->listen->accept(阻塞)
    SOCKET server;
    server = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if(server==INVALID_SOCKET)
    {
        return 0;
    }

    sockaddr_in local;
    memset(&local, 0, sizeof(local));
    local.sin_family = AF_INET;
    local.sin_port = htons(8080);
   local.sin_addr.S_un.S_addr = htonl(INADDR_ANY);

   if( bind(server, (sockaddr*)(&local), sizeof(local))!=0 )
   {
        cout<<"Error in bind"<<endl;

return MY_ERROR;
}

    if( listen(server, 10)!=0 )
    {
        cout<<"Error in listen"<<endl;

return MY_ERROR;
}

    SOCKET client;
    sockaddr_in from;
    int fromLen = sizeof(from);
    memset(&from, 0, fromLen);

cout<<"waiting for connect..."<<endl;
client = accept(server, (sockaddr*)(&from), &fromLen);

    char temp[512];
    sprintf(temp,"Your IP is %s/r/n",inet_ntoa(from.sin_addr));

   send(client, temp, strlen(temp), 0);
   cout << "Connection from " << inet_ntoa(from.sin_addr) <<"/r/n";

   closesocket(client);

   closesocket(server);

WSACleanup();

return 0;
}

客户端
#include <iostream>
#include <Winsock2.h>

#pragma comment( lib, "Ws2_32.lib" )

using namespace std;

const int MY_ERROR = -1;

int main( )
{
WSADATA wsaData;

if(WSAStartup(MAKEWORD(2,2), &wsaData)!=0)
{
cout<<"Error in WSAStartup"<<endl;

return MY_ERROR;
}

SOCKET conn;
conn = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(conn == INVALID_SOCKET)
{
cout<<"Error in socket"<<endl;

return MY_ERROR;
}

sockaddr_in server;
memset(&server, 0, sizeof(server));
server.sin_family = AF_INET;
server.sin_port = htons(8080);
server.sin_addr.S_un.S_addr = inet_addr("192.168.1.99");

if(connect(conn, (sockaddr*)(&server), sizeof(server))!=0 )
{
closesocket(conn);

cout<<"Error in connect"<<endl;

return MY_ERROR;
}

closesocket(conn);

WSACleanup();

return 0;
}