/*
 * Copyright (c) 2000-2001 Boris Popov
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by Boris Popov.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
 *
 * $Id: smb_dev.h,v 1.10.178.1 2005/05/27 02:35:29 lindak Exp $
 */

/*
 * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _NETSMB_DEV_H_
#define	_NETSMB_DEV_H_

/*
 * This file defines an internal ABI for the "nsmb" driver,
 * particularly the various data structures passed to ioctl.
 * In order to avoid some messy 32-bit to 64-bit conversions
 * in the driver, we take pains to define all data structures
 * that pass across the user/kernel boundary in a way that
 * makes them invariant across 32-bit and 64-bit ABIs.
 * This invariance is checked during the driver build
 * using a mechanism similar to genassym.h builds.
 *
 * If you change any of the ioctl data structures in
 * this file, YOU MUST ALSO edit this file:
 *   uts/common/fs/smbclnt/netsmb/offsets.in
 * and then verify the invariance describe above.
 *
 * Also, remember to "bump" NSMB_VER below when
 * any part of this user/kernel I/F changes.
 */

#include <sys/types.h>
#include <sys/socket_impl.h>
#include <netinet/in.h>

#define	NSMB_NAME		"nsmb"

/*
 * Update NSMB_VER* if any of the ioctl codes and/or
 * associated structures change in ways that would
 * make them incompatible with an old driver.
 */
#define	NSMB_VERMAJ	1
#define	NSMB_VERMIN	4000
#define	NSMB_VERSION	(NSMB_VERMAJ * 100000 + NSMB_VERMIN)

/*
 * Some errno values we need to expose to the library.
 * NB: these are also defined in the library smbfs_api.h
 * to avoid exposing all of this stuff in that API.
 *
 * EBADRPC is used for message decoding errors.
 * EAUTH is used for CIFS authentication errors.
 */
#ifndef EBADRPC
#define	EBADRPC 	113
#endif
#ifndef EAUTH
#define	EAUTH		114
#endif

/*
 * Upper/lower case options
 */
#define	SMB_CS_NONE	0x0000
#define	SMB_CS_UPPER	0x0001	/* convert passed string to upper case */
#define	SMB_CS_LOWER	0x0002	/* convert passed string to lower case */

/*
 * access mode stuff (see also smb_lib.h)
 */
#define	SMBM_ANY_OWNER		((uid_t)-1)
#define	SMBM_ANY_GROUP		((gid_t)-1)

/*
 * Option flags in smbioc_ossn.ioc_opt
 * and vcspec.optflags
 */
#define	SMBVOPT_CREATE		0x0001	/* create object if necessary */
#define	SMBVOPT_PRIVATE		0x0002	/* connection should be private */
#define	SMBVOPT_SINGLESHARE	0x0004	/* keep only one share at this VC */
#define	SMBVOPT_PERMANENT	0x0010	/* object will keep last reference */
#define	SMBVOPT_EXT_SEC		0x0020	/* extended security negotiation */
#define	SMBVOPT_USE_KEYCHAIN	0x0040	/* get p/w from keychain */
#define	SMBVOPT_KC_DOMAIN	0x0080	/* keychain lookup uses domain */

#define	SMBVOPT_SIGNING_ENABLED		0x0100	/* sign if server agrees */
#define	SMBVOPT_SIGNING_REQUIRED	0x0200	/* signing required */
#define	SMBVOPT_SIGNING_MASK		0x0300	/* all signing bits */

/*
 * Option flags in smbioc_oshare.ioc_opt
 * and sharespec.optflags
 */
#define	SMBSOPT_CREATE		SMBVOPT_CREATE
#define	SMBSOPT_PERMANENT	SMBVOPT_PERMANENT

/* All user and machine names. */
#define	SMBIOC_MAX_NAME		256

/*
 * Size of storage for p/w hashes.
 * Also for SMBIOC_GETSSNKEY.
 */
#define	SMBIOC_HASH_SZ	16

/*
 * network IO daemon states
 * really connection states.
 */
enum smbiod_state {
	SMBIOD_ST_IDLE = 0,	/* no user requests enqueued yet */
	SMBIOD_ST_RECONNECT,	/* a [re]connect attempt is in progress */
	SMBIOD_ST_RCFAILED,	/* a reconnect attempt has failed */
	SMBIOD_ST_VCACTIVE,	/* session established */
	SMBIOD_ST_DEAD		/* connection gone, no IOD */
};


/*
 * We're now using structures that are invariant
 * across 32-bit vs 64-bit compilers for all
 * member sizes and offsets.  Scalar members
 * simply have to use fixed-size types.
 * Pointers are a little harder...
 * We use this union for all pointers that
 * must pass between user and kernel.
 */
typedef union lptr {
	uint64_t lp_ll;
#ifdef _LP64
	void	*lp_ptr;
#endif
#ifdef _ILP32
	void	*_lp_p2[2];
#ifdef _LITTLE_ENDIAN
#define	lp_ptr	_lp_p2[0]
#define	lp_pad	_lp_p2[1]
#else /* _ENDIAN */
#define	lp_pad	_lp_p2[0]
#define	lp_ptr	_lp_p2[1]
#endif /* _ENDIAN */
#endif /* _ILP32 */
} lptr_t;

/*
 * Handy union of sockaddr types we use.
 * Type discriminator is sa_family
 */
union smbioc_sockaddr {
	struct sockaddr sa;	/* generic */
	struct sockaddr_in sin;
	struct sockaddr_in6 sin6;
};
typedef union smbioc_sockaddr smbioc_sockaddr_t;

/*
 * This is what identifies a session.
 */
struct smbioc_ssn_ident {
	smbioc_sockaddr_t id_srvaddr;
	char		id_domain[SMBIOC_MAX_NAME];
	char		id_user[SMBIOC_MAX_NAME];
};
typedef struct smbioc_ssn_ident smbioc_ssn_ident_t;

/*
 * Flags for smbioc_ossn.ssn_opt
 */
#define	SMBLK_CREATE		SMBVOPT_CREATE

/*
 * Structure used with SMBIOC_SSN_FIND, _CREATE
 */
struct smbioc_ossn {
	uint32_t		ssn_vopt;	/* i.e. SMBVOPT_CREATE */
	uint32_t		ssn_owner;	/* Unix owner (UID) */
	smbioc_ssn_ident_t	ssn_id;
	char			ssn_srvname[SMBIOC_MAX_NAME];
};
typedef struct smbioc_ossn smbioc_ossn_t;
/* Convenience names for members under ssn_id */
#define	ssn_srvaddr	ssn_id.id_srvaddr
#define	ssn_domain	ssn_id.id_domain
#define	ssn_user	ssn_id.id_user

/*
 * Structure used with SMBIOC_TREE_FIND, _CONNECT
 */
struct smbioc_oshare {
	uint32_t	sh_use;		/* requested */
	uint32_t	sh_type;	/* returned */
	char		sh_name[SMBIOC_MAX_NAME];
	char		sh_pass[SMBIOC_MAX_NAME];
};
typedef struct smbioc_oshare smbioc_oshare_t;

typedef struct smbioc_tcon {
	int32_t		tc_flags;
	int32_t		tc_opt;
	smbioc_oshare_t	tc_sh;
} smbioc_tcon_t;


/*
 * Negotiated protocol parameters
 */
struct smb_sopt {
	int16_t		sv_proto;	/* protocol dialect */
	uchar_t		sv_sm;		/* security mode */
	int16_t		sv_tz;		/* offset in min relative to UTC */
	uint16_t	sv_maxmux;	/* max number of outstanding rq's */
	uint16_t 	sv_maxvcs;	/* max number of VCs */
	uint16_t	sv_rawmode;
	uint32_t	sv_maxtx;	/* maximum transmit buf size */
	uint32_t	sv_maxraw;	/* maximum raw-buffer size */
	uint32_t	sv_skey;	/* session key */
	uint32_t	sv_caps;	/* capabilites SMB_CAP_ */
};
typedef struct smb_sopt smb_sopt_t;

/*
 * State carried in/out of the driver by the IOD thread.
 * Inside the driver, these are members of the "VC" object.
 */
struct smb_iods {
	int32_t		is_tran_fd;	/* transport FD */
	uint32_t	is_vcflags;	/* SMBV_... */
	uint8_t 	is_hflags;	/* SMB header flags */
	uint16_t	is_hflags2;	/* SMB header flags2 */
	uint16_t	is_smbuid;	/* SMB header UID */
	uint16_t	is_next_mid;	/* SMB header MID */
	uint32_t	is_txmax;	/* max tx/rx packet size */
	uint32_t	is_rwmax;	/* max read/write data size */
	uint32_t	is_rxmax;	/* max readx data size */
	uint32_t	is_wxmax;	/* max writex data size */
	uint8_t		is_ssn_key[SMBIOC_HASH_SZ]; /* session key */
	/* Signing state */
	uint32_t	is_next_seq;	/* my next sequence number */
	uint32_t	is_u_maclen;	/* MAC key length */
	lptr_t		is_u_mackey;	/* user-space ptr! */
};
typedef struct smb_iods smb_iods_t;

/*
 * This is the operational state information passed
 * in and out of the driver for SMBIOC_SSN_WORK
 */
struct smbioc_ssn_work {
	smb_iods_t	wk_iods;
	smb_sopt_t	wk_sopt;
	int		wk_out_state;
};
typedef struct smbioc_ssn_work smbioc_ssn_work_t;

/*
 * User-level SMB requests
 */

/*
 * SMBIOC_REQUEST (simple SMB request)
 */
typedef struct smbioc_rq {
	uchar_t		ioc_cmd;
	uint8_t 	ioc_errclass;
	uint16_t	ioc_serror;
	uint32_t	ioc_error;
	uint32_t	ioc_tbufsz;	/* transmit */
	uint32_t	ioc_rbufsz;	/* receive */
	lptr_t		_ioc_tbuf;
	lptr_t		_ioc_rbuf;
} smbioc_rq_t;
#define	ioc_tbuf	_ioc_tbuf.lp_ptr
#define	ioc_rbuf	_ioc_rbuf.lp_ptr


#define	SMBIOC_T2RQ_MAXSETUP	4
#define	SMBIOC_T2RQ_MAXNAME	128

typedef struct smbioc_t2rq {
	uint16_t	ioc_setup[SMBIOC_T2RQ_MAXSETUP];
	int32_t		ioc_setupcnt;
	char		ioc_name[SMBIOC_T2RQ_MAXNAME];
	ushort_t	ioc_tparamcnt;
	ushort_t	ioc_tdatacnt;
	ushort_t	ioc_rparamcnt;
	ushort_t	ioc_rdatacnt;
	uint8_t 	ioc__pad1;
	uint8_t 	ioc_errclass;
	uint16_t	ioc_serror;
	uint32_t	ioc_error;
	uint16_t	ioc_rpflags2;
	uint16_t	ioc__pad2;
	lptr_t		_ioc_tparam;
	lptr_t		_ioc_tdata;
	lptr_t		_ioc_rparam;
	lptr_t		_ioc_rdata;
} smbioc_t2rq_t;
#define	ioc_tparam	_ioc_tparam.lp_ptr
#define	ioc_tdata	_ioc_tdata.lp_ptr
#define	ioc_rparam	_ioc_rparam.lp_ptr
#define	ioc_rdata	_ioc_rdata.lp_ptr


typedef struct smbioc_flags {
	int32_t		ioc_level;	/* 0 - session, 1 - share */
	int32_t		ioc_flags;
	int32_t		ioc_mask;
} smbioc_flags_t;

typedef struct smbioc_rw {
	int32_t		ioc_fh;
	uint32_t	ioc_cnt;
	lloff_t	_ioc_offset;
	lptr_t	_ioc_base;
} smbioc_rw_t;
#define	ioc_offset	_ioc_offset._f
#define	ioc_base	_ioc_base.lp_ptr

typedef struct smbioc_ntcreate {
	uint32_t	ioc_req_acc;
	uint32_t	ioc_efattr;
	uint32_t	ioc_share_acc;
	uint32_t	ioc_open_disp;
	uint32_t	ioc_creat_opts;
	char		ioc_name[SMBIOC_MAX_NAME];
} smbioc_ntcreate_t;

typedef struct smbioc_printjob {
	uint16_t	ioc_setuplen;
	uint16_t	ioc_prmode;
	char		ioc_title[SMBIOC_MAX_NAME];
} smbioc_printjob_t;

/* Password Keychain (PK) support. */
typedef struct smbioc_pk {
	uid_t	pk_uid;				/* UID for PAM use */
	char pk_dom[SMBIOC_MAX_NAME];		/* CIFS domain name */
	char pk_usr[SMBIOC_MAX_NAME];		/* CIFS user name */
	uchar_t pk_lmhash[SMBIOC_HASH_SZ];	/* LanMan p/w hash */
	uchar_t pk_nthash[SMBIOC_HASH_SZ];	/* NTLM p/w hash */
} smbioc_pk_t;


/*
 * Device IOCTLs
 *
 * Define ioctl codes the way ZFS does.
 * The "base" value is arbitrary, and can
 * occupy the high word if we like, because
 * our driver does its own copyin/copyout.
 * Keep GETVERS first and use it to verify
 * driver compatibility with the library.
 */
#define	SMBIOC_BASE 	((('n' << 8) | 's') << 8)
typedef enum nsmb_ioc {
	SMBIOC_GETVERS = SMBIOC_BASE,	/* keep first */
	SMBIOC_FLAGS2,		/* get hflags2 */
	SMBIOC_GETSSNKEY,	/* get SMB session key */
	SMBIOC_DUP_DEV,		/* duplicate dev handle */

	SMBIOC_REQUEST,		/* simple request */
	SMBIOC_T2RQ,		/* trans2 request */

	SMBIOC_READ,		/* read (pipe) */
	SMBIOC_WRITE,		/* write (pipe) */
	SMBIOC_NTCREATE,	/* open or create */
	SMBIOC_PRINTJOB,	/* open print job */
	SMBIOC_CLOSEFH,		/* from ntcreate or printjob */

	SMBIOC_SSN_CREATE,
	SMBIOC_SSN_FIND,
	SMBIOC_SSN_KILL,	/* force disconnect */
	SMBIOC_SSN_RELE,	/* drop our reference */

	SMBIOC_TREE_CONNECT,	/* create and connect */
	SMBIOC_TREE_FIND,
	SMBIOC_TREE_KILL,
	SMBIOC_TREE_RELE,

	SMBIOC_IOD_WORK,	/* work on session requests */
	SMBIOC_IOD_IDLE,	/* wait for requests on this session */
	SMBIOC_IOD_RCFAIL,	/* notify that reconnect failed */

	/* Password Keychain (PK) support. */
	SMBIOC_PK_ADD,    /* Add/Modify a password entry */
	SMBIOC_PK_CHK,    /* Check for a password entry */
	SMBIOC_PK_DEL,    /* Delete specified password entry */
	SMBIOC_PK_DEL_OWNER,	/* all owned by the caller */
	SMBIOC_PK_DEL_EVERYONE	/* all owned by everyone */
} nsmb_ioc_t;

#endif /* _NETSMB_DEV_H_ */