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/*
* Samba AppleDouble helpers
*
* Copyright (C) Ralph Boehme, 2019
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _ADOUBLE_H_
#define _ADOUBLE_H_
#include "MacExtensions.h"
#define ADOUBLE_NAME_PREFIX "._"
#define NETATALK_META_XATTR "org.netatalk.Metadata"
#define NETATALK_RSRC_XATTR "org.netatalk.ResourceFork"
#if defined(HAVE_ATTROPEN)
#define AFPINFO_EA_NETATALK NETATALK_META_XATTR
#define AFPRESOURCE_EA_NETATALK NETATALK_RSRC_XATTR
#else
#define AFPINFO_EA_NETATALK "user." NETATALK_META_XATTR
#define AFPRESOURCE_EA_NETATALK "user." NETATALK_RSRC_XATTR
#endif
/*
* There are two AppleDouble blobs we deal with:
*
* - ADOUBLE_META - AppleDouble blob used by Netatalk for storing
* metadata in an xattr
*
* - ADOUBLE_RSRC - AppleDouble blob used by OS X and Netatalk in
* ._ files
*/
typedef enum {ADOUBLE_META, ADOUBLE_RSRC} adouble_type_t;
/* Version info */
#define AD_VERSION2 0x00020000
#define AD_VERSION AD_VERSION2
/*
* AppleDouble entry IDs.
*/
#define ADEID_DFORK 1
#define ADEID_RFORK 2
#define ADEID_NAME 3
#define ADEID_COMMENT 4
#define ADEID_ICONBW 5
#define ADEID_ICONCOL 6
#define ADEID_FILEI 7
#define ADEID_FILEDATESI 8
#define ADEID_FINDERI 9
#define ADEID_MACFILEI 10
#define ADEID_PRODOSFILEI 11
#define ADEID_MSDOSFILEI 12
#define ADEID_SHORTNAME 13
#define ADEID_AFPFILEI 14
#define ADEID_DID 15
/* Private Netatalk entries */
#define ADEID_PRIVDEV 16
#define ADEID_PRIVINO 17
#define ADEID_PRIVSYN 18
#define ADEID_PRIVID 19
#define ADEID_MAX (ADEID_PRIVID + 1)
/*
* These are the real ids for the private entries,
* as stored in the adouble file
*/
#define AD_DEV 0x80444556
#define AD_INO 0x80494E4F
#define AD_SYN 0x8053594E
#define AD_ID 0x8053567E
/* AppleDouble magic */
#define AD_APPLESINGLE_MAGIC 0x00051600
#define AD_APPLEDOUBLE_MAGIC 0x00051607
#define AD_MAGIC AD_APPLEDOUBLE_MAGIC
/* Field widths */
#define ADEDLEN_NAME 255
#define ADEDLEN_COMMENT 200
#define ADEDLEN_FILEI 16
#define ADEDLEN_FINDERI 32
#define ADEDLEN_FILEDATESI 16
#define ADEDLEN_SHORTNAME 12 /* length up to 8.3 */
#define ADEDLEN_AFPFILEI 4
#define ADEDLEN_MACFILEI 4
#define ADEDLEN_PRODOSFILEI 8
#define ADEDLEN_MSDOSFILEI 2
#define ADEDLEN_DID 4
#define ADEDLEN_PRIVDEV 8
#define ADEDLEN_PRIVINO 8
#define ADEDLEN_PRIVSYN 8
#define ADEDLEN_PRIVID 4
/*
* Sharemode locks fcntl() offsets
*/
#if _FILE_OFFSET_BITS == 64 || defined(HAVE_LARGEFILE)
#define AD_FILELOCK_BASE (UINT64_C(0x7FFFFFFFFFFFFFFF) - 9)
#else
#define AD_FILELOCK_BASE (UINT32_C(0x7FFFFFFF) - 9)
#endif
#define BYTELOCK_MAX (AD_FILELOCK_BASE - 1)
#define AD_FILELOCK_OPEN_WR (AD_FILELOCK_BASE + 0)
#define AD_FILELOCK_OPEN_RD (AD_FILELOCK_BASE + 1)
#define AD_FILELOCK_RSRC_OPEN_WR (AD_FILELOCK_BASE + 2)
#define AD_FILELOCK_RSRC_OPEN_RD (AD_FILELOCK_BASE + 3)
#define AD_FILELOCK_DENY_WR (AD_FILELOCK_BASE + 4)
#define AD_FILELOCK_DENY_RD (AD_FILELOCK_BASE + 5)
#define AD_FILELOCK_RSRC_DENY_WR (AD_FILELOCK_BASE + 6)
#define AD_FILELOCK_RSRC_DENY_RD (AD_FILELOCK_BASE + 7)
#define AD_FILELOCK_OPEN_NONE (AD_FILELOCK_BASE + 8)
#define AD_FILELOCK_RSRC_OPEN_NONE (AD_FILELOCK_BASE + 9)
/* Time stuff we overload the bits a little */
#define AD_DATE_CREATE 0
#define AD_DATE_MODIFY 4
#define AD_DATE_BACKUP 8
#define AD_DATE_ACCESS 12
#define AD_DATE_MASK (AD_DATE_CREATE | AD_DATE_MODIFY | \
AD_DATE_BACKUP | AD_DATE_ACCESS)
#define AD_DATE_UNIX (1 << 10)
#define AD_DATE_START 0x80000000
#define AD_DATE_DELTA 946684800
#define AD_DATE_FROM_UNIX(x) (htonl((x) - AD_DATE_DELTA))
#define AD_DATE_TO_UNIX(x) (ntohl(x) + AD_DATE_DELTA)
#define AD_CONV_WIPE_BLANK (1<<0)
#define AD_CONV_DELETE (1<<1)
struct adouble;
size_t ad_getentrylen(const struct adouble *ad, int eid);
size_t ad_getentryoff(const struct adouble *ad, int eid);
size_t ad_setentrylen(struct adouble *ad, int eid, size_t len);
size_t ad_setentryoff(struct adouble *ad, int eid, size_t off);
char *ad_get_entry(const struct adouble *ad, int eid);
int ad_getdate(const struct adouble *ad, unsigned int dateoff, uint32_t *date);
int ad_setdate(struct adouble *ad, unsigned int dateoff, uint32_t date);
int ad_convert(struct vfs_handle_struct *handle,
struct files_struct *dirfsp,
const struct smb_filename *smb_fname,
const char *catia_mappings,
uint32_t flags);
bool ad_unconvert(TALLOC_CTX *mem_ctx,
struct vfs_handle_struct *handle,
const char *catia_mappings,
struct smb_filename *smb_fname,
bool *converted);
struct adouble *ad_init(TALLOC_CTX *ctx, adouble_type_t type);
struct adouble *ad_get(TALLOC_CTX *ctx,
vfs_handle_struct *handle,
const struct smb_filename *smb_fname,
adouble_type_t type);
struct adouble *ad_fget(TALLOC_CTX *ctx, vfs_handle_struct *handle,
files_struct *fsp, adouble_type_t type);
int ad_set(vfs_handle_struct *handle,
struct adouble *ad,
const struct smb_filename *smb_fname);
int ad_fset(struct vfs_handle_struct *handle,
struct adouble *ad,
files_struct *fsp);
bool is_adouble_file(const char *path);
int adouble_path(TALLOC_CTX *ctx,
const struct smb_filename *smb_fname_in,
struct smb_filename **pp_smb_fname_out);
AfpInfo *afpinfo_new(TALLOC_CTX *ctx);
ssize_t afpinfo_pack(const AfpInfo *ai, char *buf);
AfpInfo *afpinfo_unpack(TALLOC_CTX *ctx, const void *data);
#endif
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