/*
* Copyright (c) 1988, 1989, 1990, 1993, 1994, 1995, 1996
*      The Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* AppleTalk protocol formats (courtesy Bill Croft of Stanford/SUMEX).
*/

struct LAP {
       nd_uint8_t      dst;
       nd_uint8_t      src;
       nd_uint8_t      type;
};
#define lapShortDDP     1       /* short DDP type */
#define lapDDP          2       /* DDP type */
#define lapKLAP         'K'     /* Kinetics KLAP type */

/* Datagram Delivery Protocol */

struct atDDP {
       nd_uint16_t     length;
       nd_uint16_t     checksum;
       nd_uint16_t     dstNet;
       nd_uint16_t     srcNet;
       nd_uint8_t      dstNode;
       nd_uint8_t      srcNode;
       nd_uint8_t      dstSkt;
       nd_uint8_t      srcSkt;
       nd_uint8_t      type;
};

struct atShortDDP {
       nd_uint16_t     length;
       nd_uint8_t      dstSkt;
       nd_uint8_t      srcSkt;
       nd_uint8_t      type;
};

#define ddpMaxWKS       0x7F
#define ddpMaxData      586
#define ddpLengthMask   0x3FF
#define ddpHopShift     10
#define ddpSize         13      /* size of DDP header (avoid struct padding) */
#define ddpSSize        5
#define ddpWKS          128     /* boundary of DDP well known sockets */
#define ddpRTMP         1       /* RTMP type */
#define ddpRTMPrequest  5       /* RTMP request type */
#define ddpNBP          2       /* NBP type */
#define ddpATP          3       /* ATP type */
#define ddpECHO         4       /* ECHO type */
#define ddpIP           22      /* IP type */
#define ddpARP          23      /* ARP type */
#define ddpEIGRP        88      /* EIGRP over Appletalk */
#define ddpKLAP         0x4b    /* Kinetics KLAP type */


/* AppleTalk Transaction Protocol */

struct atATP {
       nd_uint8_t      control;
       nd_uint8_t      bitmap;
       nd_uint16_t     transID;
       nd_uint32_t     userData;
};

#define atpReqCode      0x40
#define atpRspCode      0x80
#define atpRelCode      0xC0
#define atpXO           0x20
#define atpEOM          0x10
#define atpSTS          0x08
#define atpFlagMask     0x3F
#define atpControlMask  0xF8
#define atpMaxNum       8
#define atpMaxData      578


/* AppleTalk Echo Protocol */

struct atEcho {
       nd_uint8_t      echoFunction;
       nd_uint8_t      echoData[1];    /* Should be [], C99-style */
};

#define echoSkt         4               /* the echoer socket */
#define echoSize        1               /* size of echo header */
#define echoRequest     1               /* echo request */
#define echoReply       2               /* echo request */


/* Name Binding Protocol */

struct atNBP {
       nd_uint8_t      control;
       nd_uint8_t      id;
};

struct atNBPtuple {
       nd_uint16_t     net;
       nd_uint8_t      node;
       nd_uint8_t      skt;
       nd_uint8_t      enumerator;
};

#define nbpBrRq         0x10
#define nbpLkUp         0x20
#define nbpLkUpReply    0x30

#define nbpNIS          2
#define nbpTupleMax     15

#define nbpHeaderSize   2
#define nbpTupleSize    5

#define nbpSkt          2               /* NIS */


/* Routing Table Maint. Protocol */

#define rtmpSkt         1       /* number of RTMP socket */
#define rtmpSize        4       /* minimum size */
#define rtmpTupleSize   3


/* Zone Information Protocol */

struct zipHeader {
       nd_uint8_t              command;
       nd_uint8_t              netcount;
};

#define zipHeaderSize   2
#define zipQuery        1
#define zipReply        2
#define zipTakedown     3
#define zipBringup      4
#define ddpZIP          6
#define zipSkt          6
#define GetMyZone       7
#define GetZoneList     8

/*
* UDP port range used for ddp-in-udp encapsulation is 16512-16639
* for client sockets (128-255) and 200-327 for server sockets
* (0-127).  We also try to recognize the pre-April 88 server
* socket range of 768-895.
*/
#define atalk_port(p) \
       (((unsigned)((p) - 16512) < 128) || \
        ((unsigned)((p) - 200) < 128) || \
        ((unsigned)((p) - 768) < 128))

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