/*
 * Copyright 2016 Jakub Klama <jceel@FreeBSD.org>
 * All rights reserved
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted providing that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 */

 /*
  * Based on libixp code: ©2007-2010 Kris Maglione <maglione.k at Gmail>
  */

#ifndef LIB9P_FCALL_H
#define LIB9P_FCALL_H

#define L9P_MAX_WELEM   256

enum l9p_ftype {
    L9P_TVERSION = 100,
    L9P_RVERSION,
    L9P_TAUTH = 102,
    L9P_RAUTH,
    L9P_TATTACH = 104,
    L9P_RATTACH,
    L9P_TERROR = 106, /* illegal */
    L9P_RERROR,
    L9P_TFLUSH = 108,
    L9P_RFLUSH,
    L9P_TWALK = 110,
    L9P_RWALK,
    L9P_TOPEN = 112,
    L9P_ROPEN,
    L9P_TCREATE = 114,
    L9P_RCREATE,
    L9P_TREAD = 116,
    L9P_RREAD,
    L9P_TWRITE = 118,
    L9P_RWRITE,
    L9P_TCLUNK = 120,
    L9P_RCLUNK,
    L9P_TREMOVE = 122,
    L9P_RREMOVE,
    L9P_TSTAT = 124,
    L9P_RSTAT,
    L9P_TWSTAT = 126,
    L9P_RWSTAT,
};

enum l9p_qid_type
{
    L9P_QTDIR = 0x80,	/* type bit for directories */
    L9P_QTAPPEND = 0x40,/* type bit for append only files */
    L9P_QTEXCL = 0x20,	/* type bit for exclusive use files */
    L9P_QTMOUNT = 0x10,	/* type bit for mounted channel */
    L9P_QTAUTH = 0x08,	/* type bit for authentication file */
    L9P_QTTMP = 0x04,	/* type bit for non-backed-up file */
    L9P_QTSYMLINK = 0x02,/* type bit for symbolic link */
    L9P_QTFILE = 0x00	/* type bits for plain file */
};

enum {
        L9P_DMDIR =            0x80000000,
        L9P_DMAPPEND =         0x40000000,
        L9P_DMEXCL =           0x20000000,
        L9P_DMMOUNT =          0x10000000,
        L9P_DMAUTH =           0x08000000,
        L9P_DMTMP =            0x04000000,
        L9P_DMSYMLINK =        0x02000000,
        /* 9P2000.u extensions */
        L9P_DMDEVICE =         0x00800000,
        L9P_DMNAMEDPIPE =      0x00200000,
        L9P_DMSOCKET =         0x00100000,
        L9P_DMSETUID =         0x00080000,
        L9P_DMSETGID =         0x00040000,
};

struct l9p_hdr
{
    uint8_t	type;
    uint16_t	tag;
    uint32_t	fid;
};

struct l9p_qid
{
    enum l9p_qid_type type;
    uint32_t version;
    uint64_t path;
};

struct l9p_stat
{
    uint16_t type;
    uint32_t dev;
    struct l9p_qid qid;
    uint32_t mode;
    uint32_t atime;
    uint32_t mtime;
    uint64_t length;
    char *name;
    char *uid;
    char *gid;
    char *muid;
    char *extension;
    uid_t n_uid;
    gid_t n_gid;
    uid_t n_muid;
};

struct l9p_f_version
{
    struct l9p_hdr hdr;
    uint32_t msize;
    char *version;
};

struct l9p_f_tflush
{
    struct l9p_hdr hdr;
    uint16_t oldtag;
};

struct l9p_f_error
{
    struct l9p_hdr hdr;
    char *ename;
    uint32_t errnum;
};

struct l9p_f_ropen
{
    struct l9p_hdr hdr;
    struct l9p_qid qid;
    uint32_t iounit;
};

struct l9p_f_rauth
{
    struct l9p_hdr hdr;
    struct l9p_qid aqid;
};

struct l9p_f_attach
{
    struct l9p_hdr hdr;
    uint32_t afid;
    char *uname;
    char *aname;
    uid_t n_uname;
};

struct l9p_f_tcreate
{
    struct l9p_hdr hdr;
    uint32_t perm;
    char *name;
    uint8_t	mode; /* +Topen */
    char *extension;
};

struct l9p_f_twalk
{
    struct l9p_hdr hdr;
    uint32_t newfid;
    uint16_t nwname;
    char *wname[L9P_MAX_WELEM];
};

struct l9p_f_rwalk
{
    struct l9p_hdr hdr;
    uint16_t nwqid;
    struct l9p_qid wqid[L9P_MAX_WELEM];
};

struct l9p_f_io
{
    struct l9p_hdr hdr;
    uint64_t offset; /* Tread, Twrite */
    uint32_t count; /* Tread, Twrite, Rread */
    char *data; /* Twrite, Rread */
};

struct l9p_f_rstat
{
    struct l9p_hdr hdr;
    struct l9p_stat stat;
};

struct l9p_f_twstat
{
    struct l9p_hdr hdr;
    struct l9p_stat stat;
};

union l9p_fcall
{
    struct l9p_hdr hdr;
    struct l9p_f_version version;
    struct l9p_f_tflush	tflush;
    struct l9p_f_ropen ropen;
    struct l9p_f_ropen rcreate;
    struct l9p_f_ropen rattach;
    struct l9p_f_error error;
    struct l9p_f_rauth rauth;
    struct l9p_f_attach tattach;
    struct l9p_f_attach tauth;
    struct l9p_f_tcreate tcreate;
    struct l9p_f_tcreate topen;
    struct l9p_f_twalk twalk;
    struct l9p_f_rwalk rwalk;
    struct l9p_f_twstat twstat;
    struct l9p_f_rstat rstat;
    struct l9p_f_io io;
};

#endif  /* LIB9P_FCALL_H */