posix: Fix and simplify default p{read,write}v implementation

[glibc.git] / nis / rpcsvc / nis_object.x

/*
 *      nis_object.x
 *
 * Copyright (c) 2010, Oracle America, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of the "Oracle America, Inc." nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
 *   COPYRIGHT HOLDER 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
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 *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

%#pragma ident  "@(#)nis_object.x       1.12    97/11/19"

#if RPC_HDR
%
%#ifndef __nis_object_h
%#define __nis_object_h
%
#endif
/*
 *      This file defines the format for a NIS object in RPC language.
 * It is included by the main .x file and the database access protocol
 * file. It is common because both of them need to deal with the same
 * type of object. Generating the actual code though is a bit messy because
 * the nis.x file and the nis_dba.x file will generate xdr routines to
 * encode/decode objects when only one set is needed. Such is life when
 * one is using rpcgen.
 *
 * Note, the protocol doesn't specify any limits on such things as
 * maximum name length, number of attributes, etc. These are enforced
 * by the database backend. When you hit them you will no. Also see
 * the db_getlimits() function for fetching the limit values.
 *
 */

/* Some manifest constants, chosen to maximize flexibility without
 * plugging the wire full of data.
 */
const NIS_MAXSTRINGLEN = 255;
const NIS_MAXNAMELEN   = 1024;
const NIS_MAXATTRNAME  = 32;
const NIS_MAXATTRVAL   = 2048;
const NIS_MAXCOLUMNS   = 64;
const NIS_MAXATTR      = 16;
const NIS_MAXPATH      = 1024;
const NIS_MAXREPLICAS  = 128;
const NIS_MAXLINKS     = 16;

const NIS_PK_NONE      = 0;     /* no public key (unix/sys auth) */
const NIS_PK_DH        = 1;     /* Public key is Diffie-Hellman type */
const NIS_PK_RSA       = 2;     /* Public key if RSA type */
const NIS_PK_KERB      = 3;     /* Use kerberos style authentication */
const NIS_PK_DHEXT     = 4;     /* Extended Diffie-Hellman for RPC-GSS */

/*
 * The fundamental name type of NIS. The name may consist of two parts,
 * the first being the fully qualified name, and the second being an
 * optional set of attribute/value pairs.
 */
struct nis_attr {
        string  zattr_ndx<>;    /* name of the index            */
        opaque  zattr_val<>;    /* Value for the attribute.     */
};

typedef string nis_name<>;      /* The NIS name itself. */

/* NIS object types are defined by the following enumeration. The numbers
 * they use are based on the following scheme :
 *                   0 - 1023 are reserved for Sun,
 *              1024 - 2047 are defined to be private to a particular tree.
 *              2048 - 4095 are defined to be user defined.
 *              4096 - ...  are reserved for future use.
 *
 * EOL Alert - The non-prefixed names are present for backward
 * compatability only, and will not exist in future releases. Use
 * the NIS_* names for future compatability.
 */

enum zotypes {

        BOGUS_OBJ       = 0,    /* Uninitialized object structure       */
        NO_OBJ          = 1,    /* NULL object (no data)                */
        DIRECTORY_OBJ   = 2,    /* Directory object describing domain   */
        GROUP_OBJ       = 3,    /* Group object (a list of names)       */
        TABLE_OBJ       = 4,    /* Table object (a database schema)     */
        ENTRY_OBJ       = 5,    /* Entry object (a database record)     */
        LINK_OBJ        = 6,    /* A name link.                         */
        PRIVATE_OBJ     = 7,    /* Private object (all opaque data)     */

        NIS_BOGUS_OBJ   = 0,    /* Uninitialized object structure       */
        NIS_NO_OBJ      = 1,    /* NULL object (no data)                */
        NIS_DIRECTORY_OBJ = 2, /* Directory object describing domain    */
        NIS_GROUP_OBJ   = 3,    /* Group object (a list of names)       */
        NIS_TABLE_OBJ   = 4,    /* Table object (a database schema)     */
        NIS_ENTRY_OBJ   = 5,    /* Entry object (a database record)     */
        NIS_LINK_OBJ    = 6,    /* A name link.                         */
        NIS_PRIVATE_OBJ  = 7 /* Private object (all opaque data) */
};

/*
 * The types of Name services NIS knows about. They are enumerated
 * here. The Binder code will use this type to determine if it has
 * a set of library routines that will access the indicated name service.
 */
enum nstype {
        UNKNOWN = 0,
        NIS = 1,        /* Nis Plus Service             */
        SUNYP = 2,      /* Old NIS Service              */
        IVY = 3,        /* Nis Plus Plus Service        */
        DNS = 4,        /* Domain Name Service          */
        X500 = 5,       /* ISO/CCCIT X.500 Service      */
        DNANS = 6,      /* Digital DECNet Name Service  */
        XCHS = 7,       /* Xerox ClearingHouse Service  */
        CDS= 8
};

/*
 * DIRECTORY - The name service object. These objects identify other name
 * servers that are serving some portion of the name space. Each has a
 * type associated with it. The resolver library will note whether or not
 * is has the needed routines to access that type of service.
 * The oarmask structure defines an access rights mask on a per object
 * type basis for the name spaces. The only bits currently used are
 * create and destroy. By enabling or disabling these access rights for
 * a specific object type for a one of the accessor entities (owner,
 * group, world) the administrator can control what types of objects
 * may be freely added to the name space and which require the
 * administrator's approval.
 */
struct oar_mask {
        uint32_t        oa_rights;      /* Access rights mask   */
        zotypes         oa_otype;       /* Object type          */
};

struct endpoint {
        string          uaddr<>;
        string          family<>;   /* Transport family (INET, OSI, etc) */
        string          proto<>;    /* Protocol (TCP, UDP, CLNP,  etc)   */
};

/*
 * Note: pkey is a netobj which is limited to 1024 bytes which limits the
 * keysize to 8192 bits. This is consider to be a reasonable limit for
 * the expected lifetime of this service.
 */
struct nis_server {
        nis_name        name;           /* Principal name of the server  */
        endpoint        ep<>;           /* Universal addr(s) for server  */
        uint32_t        key_type;       /* Public key type               */
        netobj          pkey;           /* server's public key           */
};

struct directory_obj {
        nis_name   do_name;      /* Name of the directory being served   */
        nstype     do_type;      /* one of NIS, DNS, IVY, YP, or X.500   */
        nis_server do_servers<>; /* <0> == Primary name server           */
        uint32_t   do_ttl;       /* Time To Live (for caches)            */
        oar_mask   do_armask<>;  /* Create/Destroy rights by object type */
};

/*
 * ENTRY - This is one row of data from an information base.
 * The type value is used by the client library to convert the entry to
 * it's internal structure representation. The Table name is a back pointer
 * to the table where the entry is stored. This allows the client library
 * to determine where to send a request if the client wishes to change this
 * entry but got to it through a LINK rather than directly.
 * If the entry is a "standalone" entry then this field is void.
 */
const EN_BINARY   = 1;  /* Indicates value is binary data       */
const EN_CRYPT    = 2;  /* Indicates the value is encrypted     */
const EN_XDR      = 4;  /* Indicates the value is XDR encoded   */
const EN_MODIFIED = 8;  /* Indicates entry is modified. */
const EN_ASN1     = 64; /* Means contents use ASN.1 encoding    */

struct entry_col {
        uint32_t        ec_flags;       /* Flags for this value */
        opaque          ec_value<>;     /* It's textual value   */
};

struct entry_obj {
        string  en_type<>;      /* Type of entry such as "passwd" */
        entry_col en_cols<>;    /* Value for the entry            */
};

/*
 * GROUP - The group object contains a list of NIS principal names. Groups
 * are used to authorize principals. Each object has a set of access rights
 * for members of its group. Principal names in groups are in the form
 * name.directory and recursive groups are expressed as @groupname.directory
 */
struct group_obj {
        uint32_t        gr_flags;       /* Flags controlling group      */
        nis_name        gr_members<>;   /* List of names in group       */
};

/*
 * LINK - This is the LINK object. It is quite similar to a symbolic link
 * in the UNIX filesystem. The attributes in the main object structure are
 * relative to the LINK data and not what it points to (like the file system)
 * "modify" privleges here indicate the right to modify what the link points
 * at and not to modify that actual object pointed to by the link.
 */
struct link_obj {
        zotypes  li_rtype;      /* Real type of the object      */
        nis_attr li_attrs<>;    /* Attribute/Values for tables  */
        nis_name li_name;       /* The object's real NIS name   */
};

/*
 * TABLE - This is the table object. It implements a simple
 * data base that applications and use for configuration or
 * administration purposes. The role of the table is to group together
 * a set of related entries. Tables are the simple database component
 * of NIS. Like many databases, tables are logically divided into columns
 * and rows. The columns are labeled with indexes and each ENTRY makes
 * up a row. Rows may be addressed within the table by selecting one
 * or more indexes, and values for those indexes. Each row which has
 * a value for the given index that matches the desired value is returned.
 * Within the definition of each column there is a flags variable, this
 * variable contains flags which determine whether or not the column is
 * searchable, contains binary data, and access rights for the entry objects
 * column value.
 */

const TA_BINARY     = 1;        /* Means table data is binary           */
const TA_CRYPT      = 2;        /* Means value should be encrypted      */
const TA_XDR        = 4;        /* Means value is XDR encoded           */
const TA_SEARCHABLE = 8;        /* Means this column is searchable      */
const TA_CASE       = 16;       /* Means this column is Case Sensitive  */
const TA_MODIFIED   = 32;       /* Means this columns attrs are modified*/
const TA_ASN1       = 64;       /* Means contents use ASN.1 encoding     */

struct table_col {
        string          tc_name<64>;    /* Column Name             */
        uint32_t        tc_flags;       /* control flags           */
        uint32_t        tc_rights;      /* Access rights mask      */
};

struct table_obj {
        string    ta_type<64>;   /* Table type such as "passwd" */
        int       ta_maxcol;     /* Total number of columns     */
        u_char    ta_sep;        /* Separator character         */
        table_col ta_cols<>;     /* The number of table indexes */
        string    ta_path<>;     /* A search path for this table */
};

/*
 * This union joins together all of the currently known objects.
 */
union objdata switch (zotypes zo_type) {
        case NIS_DIRECTORY_OBJ :
                struct directory_obj di_data;
        case NIS_GROUP_OBJ :
                struct group_obj gr_data;
        case NIS_TABLE_OBJ :
                struct table_obj ta_data;
        case NIS_ENTRY_OBJ:
                struct entry_obj en_data;
        case NIS_LINK_OBJ :
                struct link_obj li_data;
        case NIS_PRIVATE_OBJ :
                opaque  po_data<>;
        case NIS_NO_OBJ :
                void;
        case NIS_BOGUS_OBJ :
                void;
        default :
                void;
};

/*
 * This is the basic NIS object data type. It consists of a generic part
 * which all objects contain, and a specialized part which varies depending
 * on the type of the object. All of the specialized sections have been
 * described above. You might have wondered why they all start with an
 * integer size, followed by the useful data. The answer is, when the
 * server doesn't recognize the type returned it treats it as opaque data.
 * And the definition for opaque data is {int size; char *data;}. In this
 * way, servers and utility routines that do not understand a given type
 * may still pass it around. One has to be careful in setting
 * this variable accurately, it must take into account such things as
 * XDR padding of structures etc. The best way to set it is to note one's
 * position in the XDR encoding stream, encode the structure, look at the
 * new position and calculate the size.
 */
struct nis_oid {
        uint32_t ctime;         /* Time of objects creation     */
        uint32_t mtime;         /* Time of objects modification */
};

struct nis_object {
        nis_oid  zo_oid;        /* object identity verifier.            */
        nis_name zo_name;       /* The NIS name for this object         */
        nis_name zo_owner;      /* NIS name of object owner.            */
        nis_name zo_group;      /* NIS name of access group.            */
        nis_name zo_domain;     /* The administrator for the object     */
        uint32_t zo_access;     /* Access rights (owner, group, world)  */
        uint32_t zo_ttl;        /* Object's time to live in seconds.    */
        objdata  zo_data;       /* Data structure for this type         */
};
#if RPC_HDR
%
%#endif /* if __nis_object_h */
%
#endif