ftp.c

 *
 * ftp->ctl_valid starts out as FALSE, and gets set to TRUE if we reach the
 * Curl_ftp_done() function without finding any major problem.
 */
static
CURLcode ftp_regular_transfer(struct connectdata *conn,
                              bool *dophase_done)
{
  CURLcode result=CURLE_OK;
  bool connected=0;
  struct SessionHandle *data = conn->data;
  struct FTP *ftp;

  /* the ftp struct is already inited in ftp_connect() */
  ftp = conn->proto.ftp;
  conn->size = -1; /* make sure this is unknown at this point */

  Curl_pgrsSetUploadCounter(data, 0);
  Curl_pgrsSetDownloadCounter(data, 0);
  Curl_pgrsSetUploadSize(data, 0);
  Curl_pgrsSetDownloadSize(data, 0);

  ftp->ctl_valid = TRUE; /* starts good */

  result = ftp_perform(conn,
                       &connected, /* have we connected after PASV/PORT */
                       dophase_done); /* all commands in the DO-phase done? */

  if(CURLE_OK == result) {

    if(!*dophase_done)
      /* the DO phase has not completed yet */
      return CURLE_OK;

    result = ftp_dophase_done(conn, connected);
    if(result)
      return result;
  }
  else
    freedirs(ftp);

  return result;
}



/***********************************************************************
 *
 * ftp_3rdparty()
 *
 * The input argument is already checked for validity.
 * Performs a 3rd party transfer between two remote hosts.
 */
static CURLcode ftp_3rdparty(struct connectdata *conn)
{
  CURLcode result = CURLE_OK;

  conn->proto.ftp->ctl_valid = conn->sec_conn->proto.ftp->ctl_valid = TRUE;
  conn->size = conn->sec_conn->size = -1;

  result = ftp_3rdparty_pretransfer(conn);
  if (!result)
    result = ftp_3rdparty_transfer(conn);

  return result;
}

#endif /* CURL_DISABLE_FTP */