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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _LINUX_DN_H
#define _LINUX_DN_H

#include <linux/ioctl.h>
#include <linux/types.h>
#include <linux/if_ether.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[ETH_ALEN];      /* 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 */

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