/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2001 by Sun Microsystems, Inc.
 * All rights reserved.
 *
 */

#ifndef _AT_H
#define _AT_H

#ifdef __cplusplus
extern "C" {
#endif

/*
 * There is a lot of alignment problems in AppleTalk packets.
 * This is the reason some of the headers use uint8_t arrays instead of the
 * natural datatype.
 */

/* AARP */

#define AARP_REQ                1
#define AARP_RESP               2
#define AARP_PROBE              3


/* DDP */

struct ddp_hdr {
        uint8_t         ddp_hop_len;
        uint8_t         ddp_len_lo;
        uint16_t        ddp_cksum;
        uint16_t        ddp_dest_net;
        uint16_t        ddp_src_net;
        uint8_t         ddp_dest_id;
        uint8_t         ddp_src_id;
        uint8_t         ddp_dest_sock;
        uint8_t         ddp_src_sock;
        uint8_t         ddp_type;
};

#define ddp_pad(x)      ((x)->ddp_hop_len & 0xc0)
#define ddp_hop(x)      (((x)->ddp_hop_len >> 2) & 0xf)
#define ddp_len(x)      ((((x)->ddp_hop_len & 0x3) << 8) + (x)->ddp_len_lo)

#define DDPHDR_SIZE 13

#define DDP_TYPE_RTMPRQ         5
#define DDP_TYPE_RTMPRESP       1
#define DDP_TYPE_NBP            2
#define DDP_TYPE_ATP            3
#define DDP_TYPE_AEP            4
#define DDP_TYPE_ZIP            6
#define DDP_TYPE_ADSP           7


/* AECHO */

#define AEP_REQ                 1
#define AEP_REPLY               2

/* NBP */

struct nbp_hdr {
        uint8_t         ddphdr[DDPHDR_SIZE];
        uint8_t         nbp_fun_cnt;
        uint8_t         nbp_id;
};

#define NBP_BRRQ                1
#define NBP_LKUP                2
#define NBP_LKUP_REPLY          3
#define NBP_FWDREQ              4


/* ZIP */

struct zip_hdr {
        uint8_t         ddphdr[DDPHDR_SIZE];
        uint8_t         zip_func;
        uint8_t         zip_netcnt;
};

#define ZIP_QUERY               1
#define ZIP_REPLY               2
#define ZIP_GET_NET_INFO        5
#define ZIP_GET_NET_INFO_REPLY  6
#define ZIP_NOTIFY              7
#define ZIP_EXT_REPLY           8

#define ZIP_ATP_GETMYZONE       7
#define ZIP_ATP_GETZONELIST     8
#define ZIP_ATP_GETLOCALZONES   9

#define ZIP_FLG_ONEZ            0x20
#define ZIP_FLG_USEBRC          0x40
#define ZIP_FLG_ZINV            0x80


/* ATP */

struct atp_hdr {
        uint8_t         ddphdr[DDPHDR_SIZE];
        uint8_t         atp_ctrl;
        uint8_t         atp_seq;
        uint8_t         atp_tid[2];
        uint8_t         atp_user[4];
};

#define ATPHDR_SIZE     8

#define atp_fun(x)      (((x) >> 6) & 0x3)
#define atp_tmo(x)      ((x) & 0x7)

#define ATP_TREQ                1
#define ATP_TRESP               2
#define ATP_TREL                3
#define ATP_FLG_STS             0x08
#define ATP_FLG_EOM             0x10
#define ATP_FLG_XO              0x20


#define NODE_ID_BROADCAST       0xff

struct ddp_adsphdr {
        uint8_t ddphdr[DDPHDR_SIZE];
        uint8_t ad_connid[2];           /* short */
        uint8_t ad_fbseq[4];            /* long */
        uint8_t ad_nrseq[4];            /* long */
        uint8_t ad_rcvwin[2];           /* short */
        uint8_t ad_desc;
};

#define AD_CTRL         0x80
#define AD_ACKREQ       0x40
#define AD_EOM          0x20
#define AD_ATT          0x10
#define AD_CTRL_MASK    0x0f

#define AD_CREQ         0x81            /* Open Conn Request */
#define AD_CACK         0x82            /* Open Conn Ack */
#define AD_CREQ_ACK     0x83            /* Open Conn Req+Ack */
#define AD_CDENY        0x84            /* Open Conn Denial */

struct ddp_adsp_att {
        struct ddp_adsphdr      ad;
        uint8_t         ad_att_code[2]; /* short */
};

struct ddp_adsp_open {
        struct ddp_adsphdr      ad;
        uint8_t         ad_version[2];  /* short */
        uint8_t         ad_dconnid[2];  /* short */
        uint8_t         ad_attseq[4];   /* long */
};

#define RTMP_REQ        1
#define RTMP_RDR_SH     2       /* Route Data Request, split horizon */
#define RTMP_RDR_NSH    3       /* Route Data Request, no split horizon */

#define RTMP_DIST_MASK  0x1f
#define RTMP_EXTEND     0x80
#define RTMP_FILLER     0x82


uint16_t get_short(uint8_t *);
uint32_t get_long(uint8_t *);

extern void interpret_aarp(int, char *, int);
extern void interpret_at(int, struct ddp_hdr *, int);
extern void interpret_nbp(int, struct nbp_hdr *, int);
extern void interpret_rtmp(int, struct ddp_hdr *, int);
extern void interpret_aecho(int, struct ddp_hdr *, int);
extern void interpret_atp(int, struct ddp_hdr *, int);
extern void interpret_adsp(int, struct ddp_adsphdr *, int);
extern void interpret_ddp_zip(int, struct zip_hdr *, int);
extern void interpret_atp_zip(int, struct atp_hdr *, int);

#ifdef __cplusplus
}
#endif

#endif /* _AT_H */