Programming

// fill the area of memory taken by serv_addr structure with zeros
bzero((char *) &serv_addr, sizeof(serv_addr));

// set the sin_family member of serv_addr to AF_INET (IP Address Family)
serv_addr.sin_family = AF_INET;

// copy the address returned by gethostbyname() into the s_addr member of serv_addr
// s_addr contains the integer representation of the IP address
bcopy((char *)server->h_addr, (char *)&serv_addr.sin_addr.s_addr, server->h_length);

// set the sin_port member of serv_addr to the port number
// htons converts a u_short from host to IP network byte order (which is big-endian).
serv_addr.sin_port = htons(portno);

class connection
{
private:
   SOCKET    the_socket;
   char *    in_buffer;
   char *    out_buffer;
   unsigned int    in_index;
   unsigned int    out_index;
   unsigned int    in_buffer_total;
   unsigned int    out_buffer_total;
   unsigned int    last_winsock_error;
   TASK_HANDLE_TYPE    owner_task;
   fd_set    fds;
   struct timeval    timeout;

public:

   connection (void);
   ~connection (void);

   int get_connected (char * hostname, char * service);
   SOCKET get_socket(void)
   {
      return (the_socket);
   }
   TASK_HANDLE_TYPE    get_owner_task(void)
   {
      return (owner_task);
   }
   int    get_buffer(int wait);
   int    close (void);
   int    getchar (int wait, char * ch);
   int    put_data (char * data, unsigned long length);
   int    put_data_buffered (char * data, unsigned long length);
   int    put_data_flush (void);
};