#ifndef _LINUX_DN_H
  #define _LINUX_DN_H

  #include <linux/types.h>

  /*
  
  	DECnet Data Structures and Constants
  
  */
  
  /* 
   * DNPROTO_NSP can't be the same as SOL_SOCKET, 
   * so increment each by one (compared to ULTRIX)
   */
  #define DNPROTO_NSP     2                       /* NSP protocol number       */
  #define DNPROTO_ROU     3                       /* Routing protocol number   */
  #define DNPROTO_NML     4                       /* Net mgt protocol number   */
  #define DNPROTO_EVL     5                       /* Evl protocol number (usr) */
  #define DNPROTO_EVR     6                       /* Evl protocol number (evl) */
  #define DNPROTO_NSPT    7                       /* NSP trace protocol number */
  
  
  #define DN_ADDL		2
  #define DN_MAXADDL	2 /* ULTRIX headers have 20 here, but pathworks has 2 */
  #define DN_MAXOPTL	16
  #define DN_MAXOBJL	16
  #define DN_MAXACCL	40
  #define DN_MAXALIASL	128
  #define DN_MAXNODEL	256
  #define DNBUFSIZE	65023
  
  /* 
   * SET/GET Socket options  - must match the DSO_ numbers below
   */
  #define SO_CONDATA      1
  #define SO_CONACCESS    2
  #define SO_PROXYUSR     3
  #define SO_LINKINFO     7
  
  #define DSO_CONDATA     1        /* Set/Get connect data                */
  #define DSO_DISDATA     10       /* Set/Get disconnect data             */
  #define DSO_CONACCESS   2        /* Set/Get connect access data         */
  #define DSO_ACCEPTMODE  4        /* Set/Get accept mode                 */
  #define DSO_CONACCEPT   5        /* Accept deferred connection          */
  #define DSO_CONREJECT   6        /* Reject deferred connection          */
  #define DSO_LINKINFO    7        /* Set/Get link information            */
  #define DSO_STREAM      8        /* Set socket type to stream           */
  #define DSO_SEQPACKET   9        /* Set socket type to sequenced packet */
  #define DSO_MAXWINDOW   11       /* Maximum window size allowed         */
  #define DSO_NODELAY	12       /* Turn off nagle                      */
  #define DSO_CORK        13       /* Wait for more data!                 */
  #define DSO_SERVICES	14       /* NSP Services field                  */
  #define DSO_INFO	15       /* NSP Info field                      */
  #define DSO_MAX         15       /* Maximum option number               */
  
  
  /* LINK States */
  #define LL_INACTIVE	0
  #define LL_CONNECTING	1
  #define LL_RUNNING	2
  #define LL_DISCONNECTING 3
  
  #define ACC_IMMED 0
  #define ACC_DEFER 1
  
  #define SDF_WILD        1                  /* Wild card object          */
  #define SDF_PROXY       2                  /* Addr eligible for proxy   */
  #define SDF_UICPROXY    4                  /* Use uic-based proxy       */
  
  /* Structures */

  struct dn_naddr {

  	__le16		a_len;
  	__u8 a_addr[DN_MAXADDL]; /* Two bytes little endian */

  };

  struct sockaddr_dn {

  	__u16		sdn_family;
  	__u8		sdn_flags;
  	__u8		sdn_objnum;
  	__le16		sdn_objnamel;
  	__u8		sdn_objname[DN_MAXOBJL];

  	struct   dn_naddr	sdn_add;
  };
  #define sdn_nodeaddrl   sdn_add.a_len   /* Node address length  */
  #define sdn_nodeaddr    sdn_add.a_addr  /* Node address         */
  
  
  
  /*
   * DECnet set/get DSO_CONDATA, DSO_DISDATA (optional data) structure
   */
  struct optdata_dn {

          __le16  opt_status;     /* Extended status return */

  #define opt_sts opt_status

          __le16  opt_optl;       /* Length of user data    */
          __u8   opt_data[16];   /* User data              */

  };

  struct accessdata_dn {

  	__u8		acc_accl;
  	__u8		acc_acc[DN_MAXACCL];
  	__u8 		acc_passl;
  	__u8		acc_pass[DN_MAXACCL];
  	__u8 		acc_userl;
  	__u8		acc_user[DN_MAXACCL];

  };
  
  /*
   * DECnet logical link information structure
   */
  struct linkinfo_dn {

          __u16  idn_segsize;    /* Segment size for link */

          __u8   idn_linkstate;  /* Logical link state    */

  };
  
  /*
   * Ethernet address format (for DECnet)
   */
  union etheraddress {

          __u8 dne_addr[6];             /* Full ethernet address */

    struct {

                  __u8 dne_hiord[4];    /* DECnet HIORD prefix   */
                  __u8 dne_nodeaddr[2]; /* DECnet node address   */

    } dne_remote;
  };
  
  
  /*
   * DECnet physical socket address format
   */
  struct dn_addr {

          __le16 dna_family;      /* AF_DECnet               */

          union etheraddress dna_netaddr; /* DECnet ethernet address */
  };
  
  #define DECNET_IOCTL_BASE 0x89 /* PROTOPRIVATE range */
  
  #define SIOCSNETADDR  _IOW(DECNET_IOCTL_BASE, 0xe0, struct dn_naddr)
  #define SIOCGNETADDR  _IOR(DECNET_IOCTL_BASE, 0xe1, struct dn_naddr)
  #define OSIOCSNETADDR _IOW(DECNET_IOCTL_BASE, 0xe0, int)
  #define OSIOCGNETADDR _IOR(DECNET_IOCTL_BASE, 0xe1, int)
  
  #endif /* _LINUX_DN_H */