www.pudn.com > MUD.rar > Demo02-01.cpp

// MUD Programming 
// Ron Penton 
// (C)2003 
// Demo02-01.cpp - Hello Internet! Server 
// This program will start up a server on port 4000, listen for a connection, 
// then wait for 128 bytes of data, and print it out as a string. 
 
 
 
// Code Block 2.1 - Header Includes 
// This code block includes all of the standard Sockets API/Winsock headers 
#ifdef WIN32                // windows 95 and above 
    #include "winsock2.h" 
    #include "Ws2tcpip.h" 
 
#else                       // UNIX/Linux 
    #include  
    #include  
    #include  
    #include  
    #include  
    #include  
#endif 
// End Code Block 2.1 - Header Includes 
 
#include  
 
// Code Block 2.2 - Redefinitions and globals For Cross-Compatibility 
#ifdef WIN32                // windows 95 and above 
    WSADATA g_wsadata;      // winsock data holder 
    #define CloseSocket closesocket 
    #define GetSocketError WSAGetLastError 
    #define StartSocketLib WSAStartup( MAKEWORD( 2, 2 ), &g_wsadata ); 
    #define CloseSocketLib WSACleanup(); 
 
    #ifndef socklen_t 
        typedef int socklen_t; 
    #endif 
#else                       // Unix/Linux 
    #define CloseSocket close 
    #define GetSocketError errno 
    #define StartSocketLib {} 
    #define CloseSocketLib {} 
#endif 
 
// End Code Block 2.2 - Redefinitions and globals For Cross-Compatibility 
 
 
 
#include              // load the iostream library 
using namespace std;            // use the std namespace 
 
int main() 
{ 
    int err;                    // for getting errors 
 
 
    // start the socket library 
    StartSocketLib; 
 
    // BEGIN CODE BLOCK 2.3 - Create a Listening Socket on port 4000 
    // create a socket 
    int sock = socket( AF_INET, SOCK_STREAM, IPPROTO_TCP ); 
 
    // check if socket was created 
    if( sock == -1 ) 
    { 
        cout << "Socket creation error!" << endl; 
        return 0; 
    } 
    cout << "Socket created!" << endl; 
 
    // create a sockaddr_in for binding, listening on port 4000 
    struct sockaddr_in socketaddress; 
    socklen_t sa_size = sizeof( struct sockaddr_in ); 
    socketaddress.sin_family = AF_INET; 
    socketaddress.sin_port = htons( 4000 ); 
    socketaddress.sin_addr.s_addr = htonl( INADDR_ANY ); 
    memset( &(socketaddress.sin_zero), 0, 8 ); 
 
    // bind the socket 
    err = bind( sock, (struct sockaddr*)&socketaddress, sa_size ); 
 
    if( err == -1 ) 
    { 
        cout << "Socket binding error!" << endl; 
        return 0; 
    } 
    cout << "Socket bound!" << endl; 
 
 
    // listen on the socket 
    err = listen( sock, 16 ); 
 
    if( err == -1 ) 
    { 
        cout << "Socket listening error!" << endl; 
        return 0; 
    } 
    cout << "Socket listening, waiting for connection..." << endl; 
    // END CODE BLOCK 2.3 - Create a Listening Socket on port 4000 
 
 
    // wait for an incomming connection now 
    int datasock; 
    datasock = accept( sock, (struct sockaddr*)&socketaddress, &sa_size ); 
 
    if( datasock == -1 ) 
    { 
        cout << "Socket accepting error!" << endl; 
        return 0; 
    } 
    cout << "Socket accepted, waiting for data..." << endl; 
 
 
    // receive data 
    char buffer[128]; 
    err = recv( datasock, buffer, 128, 0 ); 
 
    if( err == -1 ) 
    { 
        cout << "Socket receiving error!" << endl; 
        return 0; 
    } 
 
    cout << "Data received:" << endl; 
    cout << buffer << endl; 
     
    shutdown( datasock, 2 ); 
    CloseSocket( datasock ); 
 
    shutdown( sock, 2 ); 
    CloseSocket( sock ); 
 
    CloseSocketLib; 
}