DECnet Outgoing Access Control

struct accessdata_dn {
  unsigned short  acc_accl;             // account length
  unsigned char   acc_acc[DN_MAXACCL];  // account string          
  unsigned short  acc_passl;            // password length
  unsigned char   acc_pass[DN_MAXACCL]; // password string 
  unsigned short  acc_userl;            // user length 
  unsigned char   acc_user[DN_MAXACCL]; // user string 
};