tsk_iso9660.h

linux下开发的针对所有磁盘的数据恢复的源码

    unsigned char app_id[ISODCL(575, 702)];     /* application identifier */
    unsigned char copy_id[ISODCL(703, 739)];    /* copyright file identifier */
    unsigned char abs_id[ISODCL(740, 776)];     /* abstract file identifier */
    unsigned char bib_id[ISODCL(777, 813)];     /* bibliographic file identifier */
    date_time make_date;        /* volume creation date/time */
    date_time mod_date;         /* volume modification date/time */
    date_time exp_date;         /* volume expiration date/time */
    date_time ef_date;          /* volume effective date/time */
    char fs_ver[ISODCL(882, 882)];      /* file structure version */
    char res[ISODCL(883, 883)]; /* reserved */
    char app_use[ISODCL(884, 1395)];    /* application use */
    char reserv[ISODCL(1396, 2048)];    /* reserved */
} iso9660_svd;

/* iso 9660 boot record */
typedef struct {
    char boot_sys_id[ISODCL(8, 39)];    /* boot system identifier */
    char boot_id[ISODCL(40, 71)];       /* boot identifier */
    char system_use[ISODCL(72, 2048)];  /* system use */
} iso_bootrec;

/* path table record */
typedef struct {
    uint8_t len_di;             /* length of directory identifier */
    uint8_t attr_len;           /* extended attribute record length */
    uint8_t ext_loc[4];         /* location of extent */
    uint8_t par_dir[2];         /* parent directory number */
} path_table_rec;

/* extended attribute record */
typedef struct {
    uint8_t uid[ISODCL(1, 4)];  /* owner identification */
    uint8_t gid[ISODCL(5, 8)];  /* group identification */
    uint8_t mode[ISODCL(9, 10)];        /* permissions */
    uint8_t cre[ISODCL(11, 27)];        /* file creation date/time */
    uint8_t mod[ISODCL(28, 44)];        /* file modification d/t */
    uint8_t exp[ISODCL(45, 61)];        /* file expiration d/t */
    uint8_t eff[ISODCL(62, 78)];        /* file effective d/t */
    uint8_t fmt[ISODCL(79, 79)];        /* record format */
    uint8_t attr[ISODCL(80, 80)];       /* record attributes */
    uint8_t len[ISODCL(81, 84)];        /* record length */
    uint8_t sys_id[ISODCL(85, 116)];    /* system identifier */
    uint8_t uns[ISODCL(117, 180)];      /* system use, not specified */
    uint8_t e_ver[ISODCL(181, 181)];    /* extended attribute record version */
    uint8_t len_esc[ISODCL(182, 182)];  /* length of escape sequences */
} ext_attr_rec;


#define ISO_EA_IRSYS    0x0001
#define ISO_EA_IWSYS    0x0002
#define ISO_EA_IXSYS    0x0004
#define ISO_EA_IRUSR    0x0010
#define ISO_EA_IWUSR    0x0020
#define ISO_EA_IXUSR    0x0040
#define ISO_EA_IRGRP    0x0100
#define ISO_EA_IWGRP    0x0200
#define ISO_EA_IXGRP    0x0400
#define ISO_EA_IROTH    0x1000
#define ISO_EA_IWOTH    0x2000
#define ISO_EA_IXOTH    0x4000


/* primary volume descriptor linked list node */
typedef struct iso9660_pvd_node {
    iso9660_pvd pvd;
    struct iso9660_pvd_node *next;
} iso9660_pvd_node;

/* supplementary volume descriptor linked list node */
typedef struct iso9660_svd_node {
    iso9660_svd svd;
    struct iso9660_svd_node *next;
} iso9660_svd_node;

/* RockRidge extension info */
typedef struct {
    TSK_UID_T uid /* owner */ ;
    TSK_GID_T gid;              /* group */
    uint16_t mode;              /* posix file mode */
    uint32_t nlink;             /* number of links */
    char fn[ISO9660_MAXNAMLEN_STD];     /* alternate filename */
} rockridge_ext;

/** \internal
 * Internally used structure to hold basic inode information.
 *
 */
typedef struct {
    iso9660_dentry dr;          /* directory record */
    ext_attr_rec *ea;           /* extended attribute record */
    char fn[ISO9660_MAXNAMLEN + 1];     /* file name */
    rockridge_ext *rr;          /* RockRidge Extensions */
    int version;
    TSK_OFF_T susp_off;         ///< Byte offset in image of SUSP (or NULL)
    TSK_OFF_T susp_len;         ///< Length in bytes of SUSP
} iso9660_inode;

/* inode linked list node */
typedef struct iso9660_inode_node {
    iso9660_inode inode;
    TSK_OFF_T offset;           /* byte offset of inode into disk */
    TSK_INUM_T inum;            /* identifier of inode */
    int size;                   /* kludge: used to flag fifos, etc */
    int ea_size;                /* length of ext attributes */
    struct iso9660_inode_node *next;
} iso9660_inode_node;

/* The all important ISO_INFO struct */
typedef struct {
    TSK_FS_INFO fs_info;        /* SUPER CLASS */
    TSK_INUM_T dinum;           /* cached inode number */
    iso9660_inode *dinode;      /* cached disk inode */
    uint32_t path_tab_addr;     /* address of path table */
    uint32_t root_addr;         /* address of root dir extent */
    iso9660_pvd_node *pvd;      ///< Head of primary volume descriptor list (there should be only one...)
    iso9660_svd_node *svd;      ///< Head of secondary volume descriptor list 
    iso9660_inode_node *in_list;        /* list of inodes */
    uint8_t rr_found;           /* 1 if rockridge found */
} ISO_INFO;

extern TSK_RETVAL_ENUM iso9660_dir_open_meta(TSK_FS_INFO * a_fs,
    TSK_FS_DIR ** a_fs_dir, TSK_INUM_T a_addr);

extern uint8_t iso9660_dinode_load(ISO_INFO * iso, TSK_INUM_T inum);

/**********************************************************
 *
 * RockRidge Extensions
 *
 **********************************************************/


typedef struct {
    char sig[2];
    uint8_t len;
    char ver;
} iso9660_susp_head;


/**  \internal
 * SUSP Continuation Entry (CE)
 */
typedef struct {
    char sig[2];
    uint8_t len;
    char ver;
    uint8_t blk_l[4];           ///< Block location of continuation area
    uint8_t blk_m[4];
    uint8_t offset_l[4];        ///< Offset to start of continuation area (in bytes)
    uint8_t offset_m[4];
    uint8_t celen_l[4];         ///< Length of continuation area (in bytes)
    uint8_t celen_m[4];
} iso9660_susp_ce;

/**  \internal
 * SUSP SP entry
 */
typedef struct {
    char sig[2];
    uint8_t len;
    char ver;
    uint8_t chk[2];
    uint8_t skip;
} iso9660_susp_sp;

typedef struct {
    char sig[2];
    uint8_t len;
    char ver;
    uint8_t len_id;             ///< length of extension id (in bytes)
    uint8_t len_des;            ///< length of extension desc (in bytes)
    uint8_t len_src;            ///< Length of extension spec source (in bytes)
    uint8_t ext_ver;            ///< Version id 
    char ext_id[1];             ///< Extension ID text (with length of len_id);
    // next is the extension descriptor text
    // next is the extension source text
} iso9660_susp_er;


/* Rockridge ISO9660 system use field entry */
typedef struct {
    char sig[ISODCL(1, 2)];     /* signature, should be "RR" */
    uint8_t len[ISODCL(3, 3)];  /* length of system use entry */
    uint8_t ver[ISODCL(4, 4)];  /* system use entry version */
    uint8_t foo[ISODCL(5, 5)];  /* foo */
} rr_sys_use;

/* Rockridge PX entry */
typedef struct {
    char sig[ISODCL(1, 2)];     /* signature, should be "PX" */
    uint8_t len;                /* length, should be 44 */
    uint8_t ver;                /* system use entry version (1) */
    uint8_t mode_l[ISODCL(5, 8)];       /* POSIX file mode - le */
    uint8_t mode_m[ISODCL(9, 12)];      /* POSIX file mode - be */
    uint8_t links_l[ISODCL(13, 16)];    /* POSIX file links - le */
    uint8_t links_m[ISODCL(17, 20)];    /* POSIX file links - be */
    uint8_t uid_l[ISODCL(21, 24)];      /* POSIX user id - le */
    uint8_t uid_m[ISODCL(25, 28)];      /* POSIX user id - be */
    uint8_t gid_l[ISODCL(29, 32)];      /* POSIX group id - le */
    uint8_t gid_m[ISODCL(23, 36)];      /* POSIX group id - be */
    /* rockridge docs say this is here, k3b disagrees... hmmmm */
    //      uint8_t serial[ISODCL(37,44)];  /* POSIX file serial number */
} iso9660_rr_px_entry;

/* Rockridge PN entry */
typedef struct {
    char sig[ISODCL(1, 2)];     /* signature, should be "PN" */
    uint8_t len;                /* length, should be 20 */
    uint8_t ver;                /* system use entry version (1) */
    uint8_t dev_h_l[ISODCL(5, 8)];      /* top 32 bits of device # */
    uint8_t dev_h_m[ISODCL(9, 12)];     /* top 32 bits of device # */
    uint8_t dev_l_l[ISODCL(13, 16)];    /* low 32 bits of device # */
    uint8_t dev_l_m[ISODCL(17, 20)];    /* low 32 bits of device # */
} iso9660_rr_pn_entry;

/* Rockridge SL entry */
typedef struct {
    char sig[ISODCL(1, 2)];     /* signature, should be "SL" */
    uint8_t len;                /* length */
    uint8_t ver;                /* system use entry version (1) */
    uint8_t flags;              /* flags */
} iso9660_rr_sl_entry;

/* Rockridge NM entry */
typedef struct {
    char sig[ISODCL(1, 2)];     /* signature, should be "NM" */
    uint8_t len;                /* length of alternate name */
    uint8_t ver[ISODCL(4, 4)];  /* system use entry version (1) */
    uint8_t flags[ISODCL(5, 5)];        /* flags */
    char name[1];               // start of the name
} iso9660_rr_nm_entry;

/* Rockridge CL entry */
typedef struct {
    char sig[ISODCL(1, 2)];     /* signature, should be "CL" */
    uint8_t len[ISODCL(3, 3)];  /* length, should be 12 */
    uint8_t ver[ISODCL(4, 4)];  /* system use entry version (1) */
    uint8_t par_loc[ISODCL(5, 12)];     /* location of parent directory */
} iso9660_rr_cl_entry;

/* Rockridge RE entry */
typedef struct {
    char sig[ISODCL(1, 2)];     /* signature, should be "RE" */
    uint8_t len[ISODCL(3, 3)];  /* length, should be 4 */
    uint8_t ver[ISODCL(4, 4)];  /* system use entry version (1) */
} iso9660_rr_re_entry;

/* Rockridge TF entry */
typedef struct {
    char sig[ISODCL(1, 2)];     /* signature, should be "TF" */
    uint8_t len[ISODCL(3, 3)];  /* length of TF entry */
    uint8_t ver[ISODCL(4, 4)];  /* system use entry version (1) */
    uint8_t flags[ISODCL(5, 5)];        /* flags */
} iso9660_rr_tf_entry;

/* Rockridge SF entry */
typedef struct {
    char sig[ISODCL(1, 2)];     /* signature, should be "SF" */
    uint8_t len[ISODCL(3, 3)];  /* length, should be 21 */
    uint8_t ver[ISODCL(4, 4)];  /* system use entry version (1) */
    uint8_t vfs_h[ISODCL(5, 12)];       /* virtual file size high */
    uint8_t vfs_l[ISODCL(13, 20)];      /* virtual file size low */
    uint8_t depth[ISODCL(21, 21)];      /* table depth */
} iso9660_rr_sf_entry;

#endif