Programming

void ethernet::etherSetup(char *strIP,int nPort)
{
	unsigned long ip;
	
	if((*strIP <= '9') && (*strIP >= '0'))
		{
			if( (int)(ip = inet_addr(strIP)) == -1 )
				{
				printf("\r\nIP-address must be of the form a.b.c.d\n");
              	exit (2);
				}


		}
	else
		{
			server = gethostbyname(strIP);
    		if(!server) 
				{ 
				printf("\nError in host Name.\n");
				exit(2);
				}
   			ip = *(unsigned long*)(server->h_addr);
		}

/////printf("\r\nSERVER IP=%d\r\n ",ip);



	server = gethostbyaddr((char *)&ip,sizeof(ip),AF_INET);
	if (server == NULL)
		{
        	printf("\r\nERROR, no such host .\n");
        	exit(1);
    	}

	bzero((char *) &m_sockaddr_in, sizeof(m_sockaddr_in));

	m_sockaddr_in.sin_family = AF_INET;
	m_sockaddr_in.sin_port = htons(nPort);
	m_sockaddr_in.sin_addr = *(in_addr*)&ip;
	printf("remotehost : %s   , port : %d \n",strIP,nPort);
}

//-----------------------------------------------------------------
int ethernet::Create()
{
  sockfd = socket(AF_INET, SOCK_STREAM,IPPROTO_TCP);
  if ( sockfd <0 ) return -1;
  return 0;
}
//-----------------------------------------------------------------
int ethernet::Connect()
{
	int ret;

  	ret = connect(sockfd,(sockaddr*)&m_sockaddr_in,sizeof(m_sockaddr_in));
  	if ( ret <0 ) return -1; //ERROR in connection>
  	return 0;
}