// internet_client.cpp
#include "includes.h"
#include "internet_client.h"

internet_client::internet_client(char *address, int port)
{ strcpy(server_name,address);
  port_number=port;
  allOK=0;

  struct hostent* server_info_ptr=gethostbyname(server_name);
  if (server_info_ptr==NULL)
  { fprintf(stderr,"host \"%s\" not known\n", server_name); 
    return; }

  struct in_addr* coded_server_addr=(struct in_addr*)server_info_ptr->h_addr;
  if ((coded_server_addr->s_addr)==NULL)
  { fprintf(stderr,"host %s not known\n",
            inet_ntoa(*coded_server_addr)); 
    return; }

  struct sockaddr_in server_internet_addr;
  struct sockaddr *sia_ptr=(struct sockaddr *)&server_internet_addr;
  int sia_len=sizeof(server_internet_addr);
  bzero(sia_ptr,sia_len);
  server_internet_addr.sin_family=AF_INET;
  server_internet_addr.sin_addr.s_addr=coded_server_addr->s_addr;
  server_internet_addr.sin_port=htons(port_number);

  connection_socket=socket(AF_INET,SOCK_STREAM,0);
  if (connection_socket<0)
  { fprintf(stderr,"could not create an internet socket\n");
    perror("");
    return; }

  printf("\n[Connecting to %s (%s) on port %d]\n",
          server_name,inet_ntoa(*coded_server_addr),port_number);

  int n=connect(connection_socket,sia_ptr,sia_len);
  if (n<0)
  { fprintf(stderr,"Could not make connection to %s:%d\n",server_name,port_number);
    perror("");
    return; }

  read_file=fdopen(connection_socket,"r");
  write_file=fdopen(connection_socket,"w");
  if (read_file==NULL || write_file==NULL)
  { fprintf(stderr,"made a bad connection\n");
    return; }

  allOK=1;
  printf("connected OK\n"); }

void internet_client::disconnect(void)
{ if (!allOK)
    return;
  allOK=false;
  close(connection_socket); }