text: /* slap.h - stand alone ldap server include file */
  /* $OpenLDAP: pkg/ldap/servers/slapd/slap.h,v 1.86.2.23 2001/05/17 23:18:02 kurt Exp $ */
  /*
   * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
   * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   */
  
  #ifndef _SLAP_H_
  #define _SLAP_H_
  
  #include "ldap_defaults.h"
  
  #include <ac/stdlib.h>
  
  #include <sys/types.h>
  #include <ac/syslog.h>
  #include <ac/regex.h>
  #include <ac/socket.h>
  #include <ac/time.h>
  #include <ac/param.h>
  
  #include "avl.h"
  
  #ifndef ldap_debug
  #define ldap_debug slap_debug
  #endif
  
  
  #include "ldap_log.h"
  
  #include <ldap.h>
  #include <ldap_schema.h>
  
  #include "ldap_pvt_thread.h"
  #include "ldif.h"
  
  LDAP_BEGIN_DECL
  
  #define SERVICE_NAME  OPENLDAP_PACKAGE "-slapd"
  #define SLAPD_ANONYMOUS "cn=anonymous"
  
  #ifdef f_next
  #undef f_next /* name conflict between sys/file.h on SCO and struct filter */
  #endif
  
  /* LDAPMod.mod_op value ===> Must be kept in sync with ldap.h!
   *
   * This is a value used internally by the backends. It is needed to allow
   * adding values that already exist without getting an error as required by
   * modrdn when the new rdn was already an attribute value itself.
   * JCG 05/1999 (gomez@engr.sgi.com)
   */
  #define SLAP_MOD_SOFTADD	0x1000
  
  #define ON	1
  #define OFF	(-1)
  #define UNDEFINED 0
  
  #define MAXREMATCHES 10
  
  #define SLAP_MAX_INCOMING (1<<18 - 1)
  #define SLAP_MAX_WORKER_THREADS		32
  
  #define SLAP_TEXT_BUFLEN (256)
  
  /* psuedo error code indicating abandoned operation */
  #define SLAPD_ABANDON (-1)
  
  /* psuedo error code indicating disconnect */
  #define SLAPD_DISCONNECT (-2)
  
  
  /* We assume "C" locale, that is US-ASCII */
  #define ASCII_SPACE(c)	( (c) == ' ' )
  #define ASCII_LOWER(c)	( (c) >= 'a' && (c) <= 'z' )
  #define ASCII_UPPER(c)	( (c) >= 'A' && (c) <= 'Z' )
  #define ASCII_ALPHA(c)	( ASCII_LOWER(c) || ASCII_UPPER(c) )
  #define ASCII_DIGIT(c)	( (c) >= '0' && (c) <= '9' )
  #define ASCII_ALNUM(c)	( ASCII_ALPHA(c) || ASCII_DIGIT(c) )
  #define ASCII_PRINTABLE(c) ( (c) >= ' ' && (c) <= '~' )
  
  #define SLAP_NIBBLE(c) ((c)&0x0f)
  #define SLAP_ESCAPE_CHAR ('\\')
  #define SLAP_ESCAPE_LO(c) ( "0123456789ABCDEF"[SLAP_NIBBLE(c)] )
  #define SLAP_ESCAPE_HI(c) ( SLAP_ESCAPE_LO((c)>>4) )
  
  #define FILTER_ESCAPE(c) ( (c) == '*' || (c) == '\\' \
  	|| (c) == '(' || (c) == ')' || !ASCII_PRINTABLE(c) )
  
  #define DN_SEPARATOR(c)	((c) == ',' || (c) == ';')
  #define RDN_SEPARATOR(c)	((c) == ',' || (c) == ';' || (c) == '+')
  #define RDN_NEEDSESCAPE(c)	((c) == '\\' || (c) == '"')
  
  #define DESC_LEADCHAR(c)	( ASCII_ALPHA(c) )
  #define DESC_CHAR(c)	( ASCII_ALNUM(c) || (c) == '-' )
  #define OID_LEADCHAR(c)	( ASCII_DIGIT(c) )
  #define OID_SEPARATOR(c)	( (c) == '.' )
  #define OID_CHAR(c)	( OID_LEADCHAR(c) || OID_SEPARATOR(c) )
  
  #define ATTR_LEADCHAR(c)	( DESC_LEADCHAR(c) || OID_LEADCHAR(c) )
  #define ATTR_CHAR(c)	( DESC_CHAR((c)) || (c) == '.' )
  
  #define AD_LEADCHAR(c)	( ATTR_CHAR(c) )
  #define AD_CHAR(c)		( ATTR_CHAR(c) || (c) == ';' )
  
  #define SLAP_NUMERIC(c) ( ASCII_DIGIT(c) || ASCII_SPACE(c) )
  
  #define SLAP_PRINTABLE(c)	( ASCII_ALNUM(c) || (c) == '\'' || \
  	(c) == '(' || (c) == ')' || (c) == '+' || (c) == ',' || \
  	(c) == '-' || (c) == '.' || (c) == '/' || (c) == ':' || \
  	(c) == '?' || (c) == ' ' || (c) == '=' )
  #define SLAP_PRINTABLES(c)	( SLAP_PRINTABLE(c) || (c) == '$' )
  
  /* must match in schema_init.c */
  #define SLAPD_DN_SYNTAX			"1.3.6.1.4.1.1466.115.121.1.12"
  #define SLAPD_NAMEUID_SYNTAX		"1.3.6.1.4.1.1466.115.121.1.34"
  #define SLAPD_GROUP_ATTR		"member"
  #define SLAPD_GROUP_CLASS		"groupOfNames"
  #define SLAPD_ROLE_ATTR			"roleOccupant"
  #define SLAPD_ROLE_CLASS		"organizationalRole"
  
  #define SLAPD_ACI_SYNTAX		"1.3.6.1.4.1.4203.666.2.1"
  #define SLAPD_ACI_ATTR			"OpenLDAPaci"
  
  #define SLAPD_OCTETSTRING_SYNTAX "1.3.6.1.4.1.1466.115.121.1.40"
  
  /* change this to "OpenLDAPset" */
  #define SLAPD_ACI_SET_ATTR		"template"
  
  #define SLAPD_TOP_OID			"2.5.6.0"
  
  LDAP_SLAPD_F (int) slap_debug;
  
  typedef unsigned long slap_mask_t;
  
  /* Security Strength Factor */
  typedef unsigned slap_ssf_t;
  
  typedef struct slap_ssf_set {
  	slap_ssf_t sss_ssf;
  	slap_ssf_t sss_transport;
  	slap_ssf_t sss_tls;
  	slap_ssf_t sss_sasl;
  	slap_ssf_t sss_update_ssf;
  	slap_ssf_t sss_update_transport;
  	slap_ssf_t sss_update_tls;
  	slap_ssf_t sss_update_sasl;
  } slap_ssf_set_t;
  
  /*
   * Index types
   */
  #define SLAP_INDEX_TYPE           0x00FFUL
  #define SLAP_INDEX_UNDEFINED      0x0001UL
  #define SLAP_INDEX_PRESENT        0x0002UL
  #define SLAP_INDEX_EQUALITY       0x0004UL
  #define SLAP_INDEX_APPROX         0x0008UL
  #define SLAP_INDEX_SUBSTR         0x0010UL
  #define SLAP_INDEX_EXTENDED		  0x0020UL
  
  #define SLAP_INDEX_DEFAULT        SLAP_INDEX_EQUALITY
  
  #define IS_SLAP_INDEX(mask, type)	(((mask) & (type)) == (type) )
  
  #define SLAP_INDEX_SUBSTR_TYPE    0x0F00UL
  
  #define SLAP_INDEX_SUBSTR_INITIAL ( SLAP_INDEX_SUBSTR | 0x0100UL ) 
  #define SLAP_INDEX_SUBSTR_ANY     ( SLAP_INDEX_SUBSTR | 0x0200UL )
  #define SLAP_INDEX_SUBSTR_FINAL   ( SLAP_INDEX_SUBSTR | 0x0400UL )
  #define SLAP_INDEX_SUBSTR_DEFAULT \
  	( SLAP_INDEX_SUBSTR \
  	| SLAP_INDEX_SUBSTR_INITIAL \
  	| SLAP_INDEX_SUBSTR_ANY \
  	| SLAP_INDEX_SUBSTR_FINAL )
  
  #define SLAP_INDEX_SUBSTR_MINLEN	2
  #define SLAP_INDEX_SUBSTR_MAXLEN	4
  #define SLAP_INDEX_SUBSTR_STEP	2
  
  #define SLAP_INDEX_FLAGS          0xF000UL
  #define SLAP_INDEX_SUBTYPES       0x1000UL /* use index with subtypes */
  #define SLAP_INDEX_AUTO_SUBTYPES  0x2000UL /* use mask with subtypes */
  #define SLAP_INDEX_LANG           0x4000UL /* use index with lang subtypes */
  #define SLAP_INDEX_AUTO_LANG      0x8000UL /* use mask with lang subtypes */
  
  /*
   * there is a single index for each attribute.  these prefixes ensure
   * that there is no collision among keys.
   */
  #define SLAP_INDEX_EQUALITY_PREFIX	'=' 	/* prefix for equality keys     */
  #define SLAP_INDEX_APPROX_PREFIX	'~'		/* prefix for approx keys       */
  #define SLAP_INDEX_SUBSTR_PREFIX	'*'		/* prefix for substring keys    */
  #define SLAP_INDEX_SUBSTR_INITIAL_PREFIX '^'
  #define SLAP_INDEX_SUBSTR_FINAL_PREFIX '$'
  #define SLAP_INDEX_CONT_PREFIX		'.'		/* prefix for continuation keys */
  #define SLAP_INDEX_UNKNOWN_PREFIX	'?'		/* prefix for unknown keys */
  
  #define SLAP_SYNTAX_MATCHINGRULES_OID	"1.3.6.1.4.1.1466.115.121.1.30"
  #define SLAP_SYNTAX_ATTRIBUTETYPES_OID	"1.3.6.1.4.1.1466.115.121.1.3"
  #define SLAP_SYNTAX_OBJECTCLASSES_OID	"1.3.6.1.4.1.1466.115.121.1.37"
  
  /*
   * represents schema information for a database
   */
  #define SLAP_SCHERR_OUTOFMEM		1
  #define SLAP_SCHERR_CLASS_NOT_FOUND	2
  #define SLAP_SCHERR_CLASS_BAD_USAGE	3
  #define SLAP_SCHERR_ATTR_NOT_FOUND	4
  #define SLAP_SCHERR_ATTR_BAD_USAGE	5
  #define SLAP_SCHERR_DUP_CLASS		6
  #define SLAP_SCHERR_DUP_ATTR		7
  #define SLAP_SCHERR_DUP_SYNTAX		8
  #define SLAP_SCHERR_DUP_RULE		9
  #define SLAP_SCHERR_NO_NAME		10
  #define SLAP_SCHERR_ATTR_INCOMPLETE	11
  #define SLAP_SCHERR_MR_NOT_FOUND	12
  #define SLAP_SCHERR_SYN_NOT_FOUND	13
  #define SLAP_SCHERR_MR_INCOMPLETE	14
  #define SLAP_SCHERR_NOT_SUPPORTED	15
  
  typedef struct slap_oid_macro {
  	struct berval som_oid;
  	char **som_names;
  	struct slap_oid_macro *som_next;
  } OidMacro;
  
  /* forward declarations */
  struct slap_syntax;
  struct slap_matching_rule;
  
  typedef int slap_syntax_validate_func LDAP_P((
  	struct slap_syntax *syntax,
  	struct berval * in));
  
  typedef int slap_syntax_transform_func LDAP_P((
  	struct slap_syntax *syntax,
  	struct berval * in,
  	struct berval ** out));
  
  typedef struct slap_syntax {
  	LDAPSyntax			ssyn_syn;
  #define ssyn_oid		ssyn_syn.syn_oid
  #define ssyn_desc		ssyn_syn.syn_desc
  #define ssyn_extensions		ssyn_syn.syn_extensions
  
  	unsigned	ssyn_flags;
  
  #define SLAP_SYNTAX_NONE	0x00U
  #define SLAP_SYNTAX_BLOB	0x01U /* syntax treated as blob (audio) */
  #define SLAP_SYNTAX_BINARY	0x02U /* binary transfer required (certificate) */
  #define SLAP_SYNTAX_BER		0x04U /* stored using BER encoding (binary,certificate) */
  #define SLAP_SYNTAX_HIDE	0x80U /* hide (do not publish) */
  
  	slap_syntax_validate_func	*ssyn_validate;
  	slap_syntax_transform_func	*ssyn_normalize;
  	slap_syntax_transform_func	*ssyn_pretty;
  
  #ifdef SLAPD_BINARY_CONVERSION
  	/* convert to and from binary */
  	slap_syntax_transform_func	*ssyn_ber2str;
  	slap_syntax_transform_func	*ssyn_str2ber;
  #endif
  
  	struct slap_syntax		*ssyn_next;
  } Syntax;
  
  #define slap_syntax_is_flag(s,flag) ((int)((s)->ssyn_flags & (flag)) ? 1 : 0)
  #define slap_syntax_is_blob(s)		slap_syntax_is_flag((s),SLAP_SYNTAX_BLOB)
  #define slap_syntax_is_binary(s)	slap_syntax_is_flag((s),SLAP_SYNTAX_BINARY)
  #define slap_syntax_is_ber(s)		slap_syntax_is_flag((s),SLAP_SYNTAX_BER)
  #define slap_syntax_is_hidden(s)	slap_syntax_is_flag((s),SLAP_SYNTAX_HIDE)
  
  /* X -> Y Converter */
  typedef int slap_mr_convert_func LDAP_P((
  	struct berval * in,
  	struct berval ** out ));
  
  /* Normalizer */
  typedef int slap_mr_normalize_func LDAP_P((
  	slap_mask_t use,
  	struct slap_syntax *syntax, /* NULL if in is asserted value */
  	struct slap_matching_rule *mr,
  	struct berval * in,
  	struct berval ** out ));
  
  /* Match (compare) function */
  typedef int slap_mr_match_func LDAP_P((
  	int *match,
  	slap_mask_t use,
  	struct slap_syntax *syntax,	/* syntax of stored value */
  	struct slap_matching_rule *mr,
  	struct berval * value,
  	void * assertValue ));
  
  /* Index generation function */
  typedef int slap_mr_indexer_func LDAP_P((
  	slap_mask_t use,
  	slap_mask_t mask,
  	struct slap_syntax *syntax,	/* syntax of stored value */
  	struct slap_matching_rule *mr,
  	struct berval *prefix,
  	struct berval **values,
  	struct berval ***keys ));
  
  /* Filter index function */
  typedef int slap_mr_filter_func LDAP_P((
  	slap_mask_t use,
  	slap_mask_t mask,
  	struct slap_syntax *syntax,	/* syntax of stored value */
  	struct slap_matching_rule *mr,
  	struct berval *prefix,
  	void * assertValue,
  	struct berval ***keys ));
  
  typedef struct slap_matching_rule {
  	LDAPMatchingRule		smr_mrule;
  	slap_mask_t				smr_usage;
  
  #define SLAP_MR_TYPE_MASK		0xFF00U
  #define SLAP_MR_SUBTYPE_MASK	0x00F0U
  #define SLAP_MR_USAGE			0x000FU
  
  #define SLAP_MR_NONE			0x0000U
  #define SLAP_MR_EQUALITY		0x0100U
  #define SLAP_MR_ORDERING		0x0200U
  #define SLAP_MR_SUBSTR			0x0400U
  #define SLAP_MR_EXT				0x0800U
  
  #define SLAP_MR_EQUALITY_APPROX	( SLAP_MR_EQUALITY | 0x0010U )
  
  #define SLAP_MR_SUBSTR_INITIAL	( SLAP_MR_SUBSTR | 0x0010U )
  #define SLAP_MR_SUBSTR_ANY		( SLAP_MR_SUBSTR | 0x0020U )
  #define SLAP_MR_SUBSTR_FINAL	( SLAP_MR_SUBSTR | 0x0040U )
  
  /* this is used to kludge objectClass testing */
  #define SLAP_MR_MODIFY_MATCHING 0x0001U
  
  	Syntax					*smr_syntax;
  	slap_mr_convert_func	*smr_convert;
  	slap_mr_normalize_func	*smr_normalize;
  	slap_mr_match_func		*smr_match;
  	slap_mr_indexer_func	*smr_indexer;
  	slap_mr_filter_func		*smr_filter;
  
  	struct slap_matching_rule	*smr_associated;
  	struct slap_matching_rule	*smr_next;
  
  #define smr_oid				smr_mrule.mr_oid
  #define smr_names			smr_mrule.mr_names
  #define smr_desc			smr_mrule.mr_desc
  #define smr_obsolete		smr_mrule.mr_obsolete
  #define smr_syntax_oid		smr_mrule.mr_syntax_oid
  #define smr_extensions		smr_mrule.mr_extensions
  } MatchingRule;
  
  typedef struct slap_attribute_type {
  	char					*sat_cname;
  	LDAPAttributeType		sat_atype;
  	struct slap_attribute_type	*sat_sup;
  	struct slap_attribute_type	**sat_subtypes;
  	MatchingRule			*sat_equality;
  	MatchingRule			*sat_approx;
  	MatchingRule			*sat_ordering;
  	MatchingRule			*sat_substr;
  	Syntax				*sat_syntax;
  	struct slap_attribute_type	*sat_next;
  #define sat_oid			sat_atype.at_oid
  #define sat_names		sat_atype.at_names
  #define sat_desc		sat_atype.at_desc
  #define sat_obsolete		sat_atype.at_obsolete
  #define sat_sup_oid		sat_atype.at_sup_oid
  #define sat_equality_oid	sat_atype.at_equality_oid
  #define sat_ordering_oid	sat_atype.at_ordering_oid
  #define sat_substr_oid		sat_atype.at_substr_oid
  #define sat_syntax_oid		sat_atype.at_syntax_oid
  #define sat_single_value	sat_atype.at_single_value
  #define sat_collective		sat_atype.at_collective
  #define sat_no_user_mod		sat_atype.at_no_user_mod
  #define sat_usage		sat_atype.at_usage
  #define sat_extensions		sat_atype.at_extensions
  } AttributeType;
  
  #define is_at_operational(at)	((at)->sat_usage)
  #define is_at_single_value(at)	((at)->sat_single_value)
  #define is_at_collective(at)	((at)->sat_collective)
  #define is_at_obsolete(at)		((at)->sat_obsolete)
  #define is_at_no_user_mod(at)	((at)->sat_no_user_mod)
  
  typedef struct slap_object_class {
  	LDAPObjectClass		soc_oclass;
  	struct slap_object_class	**soc_sups;
  	AttributeType			**soc_required;
  	AttributeType			**soc_allowed;
  	struct slap_object_class	*soc_next;
  #define soc_oid			soc_oclass.oc_oid
  #define soc_names		soc_oclass.oc_names
  #define soc_desc		soc_oclass.oc_desc
  #define soc_obsolete		soc_oclass.oc_obsolete
  #define soc_sup_oids		soc_oclass.oc_sup_oids
  #define soc_kind		soc_oclass.oc_kind
  #define soc_at_oids_must	soc_oclass.oc_at_oids_must
  #define soc_at_oids_may		soc_oclass.oc_at_oids_may
  #define soc_extensions		soc_oclass.oc_extensions
  } ObjectClass;
  
  
  /*
   * represents a recognized attribute description ( type + options )
   */
  typedef struct slap_attr_desc {
  	struct berval *ad_cname;	/* canonical name, must be specified */
  	AttributeType *ad_type;		/* attribute type, must be specified */
  	char *ad_lang;				/* NULL if no language tags */
  	unsigned ad_flags;
  #define SLAP_DESC_NONE		0x0U
  #define SLAP_DESC_BINARY	0x1U
  } AttributeDescription;
  
  #define slap_ad_is_lang(ad)		( (ad)->ad_lang != NULL )
  #define slap_ad_is_binary(ad)	( (int)((ad)->ad_flags & SLAP_DESC_BINARY) ? 1 : 0 )
  
  /*
   * pointers to schema elements used internally
   */
  struct slap_internal_schema {
  	/* objectClass */
  	ObjectClass *si_oc_top;
  	ObjectClass *si_oc_extensibleObject;
  	ObjectClass *si_oc_alias;
  	ObjectClass *si_oc_referral;
  	ObjectClass *si_oc_subentry;
  	ObjectClass *si_oc_subschema;
  	ObjectClass *si_oc_rootdse;
  
  	/* objectClass attribute descriptions */
  	AttributeDescription *si_ad_objectClass;
  
  	/* operational attribute descriptions */
  	AttributeDescription *si_ad_structuralObjectClass;
  	AttributeDescription *si_ad_creatorsName;
  	AttributeDescription *si_ad_createTimestamp;
  	AttributeDescription *si_ad_modifiersName;
  	AttributeDescription *si_ad_modifyTimestamp;
  	AttributeDescription *si_ad_subschemaSubentry;
  
  	/* root DSE attribute descriptions */
  	AttributeDescription *si_ad_namingContexts;
  	AttributeDescription *si_ad_supportedControl;
  	AttributeDescription *si_ad_supportedExtension;
  	AttributeDescription *si_ad_supportedLDAPVersion;
  	AttributeDescription *si_ad_supportedSASLMechanisms;
  
  	/* subschema subentry attribute descriptions */
  	AttributeDescription *si_ad_objectClasses;
  	AttributeDescription *si_ad_attributeTypes;
  	AttributeDescription *si_ad_ldapSyntaxes;
  	AttributeDescription *si_ad_matchingRules;
  	AttributeDescription *si_ad_matchingRulesUse;
  
  	/* Aliases & Referrals */
  	AttributeDescription *si_ad_aliasedObjectName;
  	AttributeDescription *si_ad_ref;
  
  	/* Access Control Internals */
  	AttributeDescription *si_ad_entry;
  	AttributeDescription *si_ad_children;
  #ifdef SLAPD_ACI_ENABLED
  	AttributeDescription *si_ad_aci;
  #endif
  
  	/* Other attributes descriptions */
  	AttributeDescription *si_ad_userPassword;
  	AttributeDescription *si_ad_authPassword;
  #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
  	AttributeDescription *si_ad_krbName;
  #endif
  
  	/* Undefined Attribute Type */
  	AttributeType	*si_at_undefined;
  };
  
  typedef struct slap_attr_assertion {
  	AttributeDescription	*aa_desc;
  	struct berval *aa_value;
  } AttributeAssertion;
  
  typedef struct slap_ss_assertion {
  	AttributeDescription	*sa_desc;
  	struct berval			*sa_initial;
  	struct berval			**sa_any;
  	struct berval			*sa_final;
  } SubstringsAssertion;
  
  typedef struct slap_mr_assertion {
  	char					*ma_rule;	/* optional */
  	AttributeDescription	*ma_desc;	/* optional */
  	int						ma_dnattrs; /* boolean */
  	struct berval			*ma_value;	/* required */
  } MatchingRuleAssertion;
  
  
  /*
   * represents a search filter
   */
  typedef struct slap_filter {
  	ber_tag_t	f_choice;	/* values taken from ldap.h, plus: */
  #define SLAPD_FILTER_COMPUTED	((ber_tag_t) -1)
  #define SLAPD_FILTER_DN_ONE		((ber_tag_t) -2)
  #define SLAPD_FILTER_DN_SUBTREE	((ber_tag_t) -3)
  
  
  	union f_un_u {
  		/* precomputed result */
  		ber_int_t f_un_result;
  
  		/* DN */
  		char *f_un_dn;
  
  		/* present */
  		AttributeDescription *f_un_desc;
  
  		/* simple value assertion */
  		AttributeAssertion *f_un_ava;
  
  		/* substring assertion */
  		SubstringsAssertion *f_un_ssa;
  
  		/* matching rule assertion */
  		MatchingRuleAssertion *f_un_mra;
  
  #define f_dn			f_un.f_un_dn
  #define f_desc			f_un.f_un_desc
  #define f_ava			f_un.f_un_ava
  #define f_av_desc		f_un.f_un_ava->aa_desc
  #define f_av_value		f_un.f_un_ava->aa_value
  #define f_sub			f_un.f_un_ssa
  #define f_sub_desc		f_un.f_un_ssa->sa_desc
  #define f_sub_initial	f_un.f_un_ssa->sa_initial
  #define f_sub_any		f_un.f_un_ssa->sa_any
  #define f_sub_final		f_un.f_un_ssa->sa_final
  #define f_mra			f_un.f_un_mra
  #define f_mr_rule		f_un.f_un_mra->ma_rule
  #define f_mr_desc		f_un.f_un_mra->ma_desc
  #define f_mr_value		f_un.f_un_mra->ma_value
  #define	f_mr_dnattrs	f_un.f_un_mra->ma_dnattrs
  
  		/* and, or, not */
  		struct slap_filter *f_un_complex;
  	} f_un;
  
  #define f_result	f_un.f_un_result
  #define f_and		f_un.f_un_complex
  #define f_or		f_un.f_un_complex
  #define f_not		f_un.f_un_complex
  #define f_list		f_un.f_un_complex
  
  	struct slap_filter	*f_next;
  } Filter;
  
  /* compare routines can return undefined */
  #define SLAPD_COMPARE_UNDEFINED	((ber_int_t) -1)
  
  /*
   * represents an attribute (description + values)
   */
  typedef struct slap_attr {
  	AttributeDescription *a_desc;
  	struct berval	**a_vals;
  	struct slap_attr	*a_next;
  } Attribute;
  
  
  /*
   * the id used in the indexes to refer to an entry
   */
  typedef unsigned long	ID;
  #define NOID	((ID)~0)
  
  /*
   * represents an entry in core
   */
  typedef struct slap_entry {
  	/*
  	 * The ID field should only be changed before entry is
  	 * inserted into a cache.  The ID value is backend
  	 * specific.
  	 */
  	ID		e_id;
  
  	char		*e_dn;		/* DN of this entry */
  	char		*e_ndn;		/* normalized DN of this entry */
  	Attribute	*e_attrs;	/* list of attributes + values */
  
  	/* for use by the backend for any purpose */
  	void*	e_private;
  } Entry;
  
  /*
   * A list of LDAPMods
   */
  typedef struct slap_mod {
  	int sm_op;
  	AttributeDescription *sm_desc;
  	struct berval **sm_bvalues;
  } Modification;
  
  typedef struct slap_mod_list {
  	Modification sml_mod;
  #define sml_op		sml_mod.sm_op
  #define sml_desc	sml_mod.sm_desc
  #define sml_bvalues	sml_mod.sm_bvalues
  	struct slap_mod_list *sml_next;
  } Modifications;
  
  typedef struct slap_ldap_modlist {
  	LDAPMod ml_mod;
  	struct slap_ldap_modlist *ml_next;
  #define ml_op		ml_mod.mod_op
  #define ml_type		ml_mod.mod_type
  #define ml_values	ml_mod.mod_values
  #define ml_bvalues	ml_mod.mod_bvalues
  } LDAPModList;
  
  /*
   * represents an access control list
   */
  typedef enum slap_access_e {
  	ACL_INVALID_ACCESS = -1,
  	ACL_NONE = 0,
  	ACL_AUTH,
  	ACL_COMPARE,
  	ACL_SEARCH,
  	ACL_READ,
  	ACL_WRITE
  } slap_access_t;
  
  typedef enum slap_control_e {
  	ACL_INVALID_CONTROL	= 0,
  	ACL_STOP,
  	ACL_CONTINUE,
  	ACL_BREAK
  } slap_control_t;
  
  typedef enum slap_style_e {
  	ACL_STYLE_REGEX = 0,
  	ACL_STYLE_BASE,
  	ACL_STYLE_ONE,
  	ACL_STYLE_SUBTREE,
  	ACL_STYLE_CHILDREN,
  	ACL_STYLE_ATTROF,
  
  	/* alternate names */
  	ACL_STYLE_EXACT = ACL_STYLE_BASE
  } slap_style_t;
  
  typedef struct slap_authz_info {
  	ber_tag_t	sai_method;		/* LDAP_AUTH_* from <ldap.h> */
  	char *		sai_mech;		/* SASL Mechanism */
  	char *		sai_dn;			/* DN for reporting purposes */
  	char *		sai_ndn;		/* Normalized DN */
  
  	/* Security Strength Factors */
  	slap_ssf_t	sai_ssf;			/* Overall SSF */
  	slap_ssf_t	sai_transport_ssf;	/* Transport SSF */
  	slap_ssf_t	sai_tls_ssf;		/* TLS SSF */
  	slap_ssf_t	sai_sasl_ssf;		/* SASL SSF */
  } AuthorizationInformation;
  
  /* the "by" part */
  typedef struct slap_access {
  	slap_control_t a_type;
  
  #define ACL_ACCESS2PRIV(access)	(0x01U << (access))
  
  #define ACL_PRIV_NONE			ACL_ACCESS2PRIV( ACL_NONE )
  #define ACL_PRIV_AUTH			ACL_ACCESS2PRIV( ACL_AUTH )
  #define ACL_PRIV_COMPARE		ACL_ACCESS2PRIV( ACL_COMPARE )
  #define ACL_PRIV_SEARCH			ACL_ACCESS2PRIV( ACL_SEARCH )
  #define ACL_PRIV_READ			ACL_ACCESS2PRIV( ACL_READ )
  #define ACL_PRIV_WRITE			ACL_ACCESS2PRIV( ACL_WRITE )
  
  #define ACL_PRIV_MASK			0x00ffUL
  
  /* priv flags */
  #define ACL_PRIV_LEVEL			0x1000UL
  #define ACL_PRIV_ADDITIVE		0x2000UL
  #define ACL_PRIV_SUBSTRACTIVE	0x4000UL
  
  /* invalid privs */
  #define ACL_PRIV_INVALID		0x0UL
  
  #define ACL_PRIV_ISSET(m,p)		(((m) & (p)) == (p))
  #define ACL_PRIV_ASSIGN(m,p)	do { (m)  =  (p); } while(0)
  #define ACL_PRIV_SET(m,p)		do { (m) |=  (p); } while(0)
  #define ACL_PRIV_CLR(m,p)		do { (m) &= ~(p); } while(0)
  
  #define ACL_INIT(m)				ACL_PRIV_ASSIGN(m, ACL_PRIV_NONE)
  #define ACL_INVALIDATE(m)		ACL_PRIV_ASSIGN(m, ACL_PRIV_INVALID)
  
  #define ACL_GRANT(m,a)			ACL_PRIV_ISSET((m),ACL_ACCESS2PRIV(a))
  
  #define ACL_IS_INVALID(m)		((m) == ACL_PRIV_INVALID)
  
  #define ACL_IS_LEVEL(m)			ACL_PRIV_ISSET((m),ACL_PRIV_LEVEL)
  #define ACL_IS_ADDITIVE(m)		ACL_PRIV_ISSET((m),ACL_PRIV_ADDITIVE)
  #define ACL_IS_SUBTRACTIVE(m)	ACL_PRIV_ISSET((m),ACL_PRIV_SUBSTRACTIVE)
  
  #define ACL_LVL_NONE			(ACL_PRIV_NONE|ACL_PRIV_LEVEL)
  #define ACL_LVL_AUTH			(ACL_PRIV_AUTH|ACL_LVL_NONE)
  #define ACL_LVL_COMPARE			(ACL_PRIV_COMPARE|ACL_LVL_AUTH)
  #define ACL_LVL_SEARCH			(ACL_PRIV_SEARCH|ACL_LVL_COMPARE)
  #define ACL_LVL_READ			(ACL_PRIV_READ|ACL_LVL_SEARCH)
  #define ACL_LVL_WRITE			(ACL_PRIV_WRITE|ACL_LVL_READ)
  
  #define ACL_LVL(m,l)			(((m)&ACL_PRIV_MASK) == ((l)&ACL_PRIV_MASK))
  #define ACL_LVL_IS_NONE(m)		ACL_LVL((m),ACL_LVL_NONE)
  #define ACL_LVL_IS_AUTH(m)		ACL_LVL((m),ACL_LVL_AUTH)
  #define ACL_LVL_IS_COMPARE(m)	ACL_LVL((m),ACL_LVL_COMPARE)
  #define ACL_LVL_IS_SEARCH(m)	ACL_LVL((m),ACL_LVL_SEARCH)
  #define ACL_LVL_IS_READ(m)		ACL_LVL((m),ACL_LVL_READ)
  #define ACL_LVL_IS_WRITE(m)		ACL_LVL((m),ACL_LVL_WRITE)
  
  #define ACL_LVL_ASSIGN_NONE(m)		ACL_PRIV_ASSIGN((m),ACL_LVL_NONE)
  #define ACL_LVL_ASSIGN_AUTH(m)		ACL_PRIV_ASSIGN((m),ACL_LVL_AUTH)
  #define ACL_LVL_ASSIGN_COMPARE(m)	ACL_PRIV_ASSIGN((m),ACL_LVL_COMPARE)
  #define ACL_LVL_ASSIGN_SEARCH(m)	ACL_PRIV_ASSIGN((m),ACL_LVL_SEARCH)
  #define ACL_LVL_ASSIGN_READ(m)		ACL_PRIV_ASSIGN((m),ACL_LVL_READ)
  #define ACL_LVL_ASSIGN_WRITE(m)		ACL_PRIV_ASSIGN((m),ACL_LVL_WRITE)
  
  	slap_mask_t	a_access_mask;
  
  	AuthorizationInformation	a_authz;
  #define a_dn_pat	a_authz.sai_dn
  
  	slap_style_t a_dn_style;
  	AttributeDescription	*a_dn_at;
  	int			a_dn_self;
  
  	slap_style_t a_peername_style;
  	char		*a_peername_pat;
  	slap_style_t a_sockname_style;
  	char		*a_sockname_pat;
  
  	slap_style_t a_domain_style;
  	char		*a_domain_pat;
  	slap_style_t a_sockurl_style;
  	char		*a_sockurl_pat;
  	slap_style_t a_set_style;
  	char		*a_set_pat;
  
  #ifdef SLAPD_ACI_ENABLED
  	AttributeDescription	*a_aci_at;
  #endif
  
  	/* ACL Groups */
  	slap_style_t a_group_style;
  	char		*a_group_pat;
  	ObjectClass				*a_group_oc;
  	AttributeDescription	*a_group_at;
  
  	struct slap_access	*a_next;
  } Access;
  
  /* the "to" part */
  typedef struct slap_acl {
  	/* "to" part: the entries this acl applies to */
  	Filter		*acl_filter;
  	slap_style_t acl_dn_style;
  	regex_t		acl_dn_re;
  	char		*acl_dn_pat;
  	char		**acl_attrs;
  
  	/* "by" part: list of who has what access to the entries */
  	Access	*acl_access;
  
  	struct slap_acl	*acl_next;
  } AccessControl;
  
  /*
   * replog moddn param structure
   */
  struct replog_moddn {
  	char *newrdn;
  	int	deloldrdn;
  	char *newsup;
  };
  
  /*
   * Backend-info
   * represents a backend 
   */
  
  typedef struct slap_backend_info BackendInfo;	/* per backend type */
  typedef struct slap_backend_db BackendDB;		/* per backend database */
  
  LDAP_SLAPD_F (int) nBackendInfo;
  LDAP_SLAPD_F (int) nBackendDB;
  LDAP_SLAPD_F (BackendInfo	*) backendInfo;
  LDAP_SLAPD_F (BackendDB *) backendDB;
  
  LDAP_SLAPD_F (int) slapMode;	
  #define SLAP_UNDEFINED_MODE	0x0000
  #define SLAP_SERVER_MODE	0x0001
  #define SLAP_TOOL_MODE		0x0002
  #define SLAP_MODE			0x0003
  
  #define SLAP_TRUNCATE_MODE	0x0100
  
  /* temporary aliases */
  typedef BackendDB Backend;
  #define nbackends nBackendDB
  #define backends backendDB
  
  struct slap_backend_db {
  	BackendInfo	*bd_info;	/* pointer to shared backend info */
  
  	/* BackendInfo accessors */
  #define		be_config	bd_info->bi_db_config
  #define		be_type		bd_info->bi_type
  
  #define		be_bind		bd_info->bi_op_bind
  #define		be_unbind	bd_info->bi_op_unbind
  #define		be_add		bd_info->bi_op_add
  #define		be_compare	bd_info->bi_op_compare
  #define		be_delete	bd_info->bi_op_delete
  #define		be_modify	bd_info->bi_op_modify
  #define		be_modrdn	bd_info->bi_op_modrdn
  #define		be_search	bd_info->bi_op_search
  
  #define		be_extended	bd_info->bi_extended
  
  #define		be_release	bd_info->bi_entry_release_rw
  #define		be_chk_referrals	bd_info->bi_chk_referrals
  #define		be_group	bd_info->bi_acl_group
  #define		be_attribute	bd_info->bi_acl_attribute
  
  #define		be_controls	bd_info->bi_controls
  
  #define		be_connection_init	bd_info->bi_connection_init
  #define		be_connection_destroy	bd_info->bi_connection_destroy
  
  #ifdef SLAPD_TOOLS
  #define		be_entry_open bd_info->bi_tool_entry_open
  #define		be_entry_close bd_info->bi_tool_entry_close
  #define		be_entry_first bd_info->bi_tool_entry_first
  #define		be_entry_next bd_info->bi_tool_entry_next
  #define		be_entry_reindex bd_info->bi_tool_entry_reindex
  #define		be_entry_get bd_info->bi_tool_entry_get
  #define		be_entry_put bd_info->bi_tool_entry_put
  #define		be_sync bd_info->bi_tool_sync
  #endif
  
  	slap_mask_t	be_restrictops;		/* restriction operations */
  #define SLAP_RESTRICT_OP_ADD		0x0001U
  #define	SLAP_RESTRICT_OP_BIND		0x0002U
  #define SLAP_RESTRICT_OP_COMPARE	0x0004U
  #define SLAP_RESTRICT_OP_DELETE		0x0008U
  #define	SLAP_RESTRICT_OP_EXTENDED	0x0010U
  #define SLAP_RESTRICT_OP_MODIFY		0x0020U
  #define SLAP_RESTRICT_OP_RENAME		0x0040U
  #define SLAP_RESTRICT_OP_SEARCH		0x0080U
  
  #define SLAP_RESTRICT_OP_READS	\
  	( SLAP_RESTRICT_OP_COMPARE    \
  	| SLAP_RESTRICT_OP_SEARCH )
  #define SLAP_RESTRICT_OP_WRITES	\
  	( SLAP_RESTRICT_OP_ADD    \
  	| SLAP_RESTRICT_OP_DELETE \
  	| SLAP_RESTRICT_OP_MODIFY \
  	| SLAP_RESTRICT_OP_RENAME )
  
  #define SLAP_ALLOW_TLS_2_ANON	0x0001U /* StartTLS -> Anonymous */
  
  #define SLAP_DISALLOW_BIND_V2	0x0001U	/* LDAPv2 bind */
  #define SLAP_DISALLOW_BIND_ANON 0x0002U /* no anonymous */
  #define SLAP_DISALLOW_BIND_ANON_CRED \
  								0x0004U /* cred should be empty */
  #define SLAP_DISALLOW_BIND_ANON_DN \
  								0x0008U /* dn should be empty */
  
  #define SLAP_DISALLOW_BIND_SIMPLE	0x0010U	/* simple authentication */
  #define SLAP_DISALLOW_BIND_KRBV4	0x0020U /* Kerberos V4 authentication */
  
  #define SLAP_DISALLOW_TLS_AUTHC	0x0100U	/* TLS while authenticated */
  
  	slap_mask_t	be_requires;	/* pre-operation requirements */
  #define SLAP_REQUIRE_BIND		0x0001U	/* bind before op */
  #define SLAP_REQUIRE_LDAP_V3	0x0002U	/* LDAPv3 before op */
  #define SLAP_REQUIRE_AUTHC		0x0004U	/* authentication before op */
  #define SLAP_REQUIRE_SASL		0x0008U	/* SASL before op  */
  #define SLAP_REQUIRE_STRONG		0x0010U	/* strong authentication before op */
  
  	/* Required Security Strength Factor */
  	slap_ssf_set_t be_ssf_set;
  
  	/* these should be renamed from be_ to bd_ */
  	char	**be_suffix;	/* the DN suffixes of data in this backend */
  	char	**be_nsuffix;	/* the normalized DN suffixes in this backend */
  	char	**be_suffixAlias; /* pairs of DN suffix aliases and deref values */
  	char	*be_root_dn;	/* the magic "root" dn for this db 	*/
  	char	*be_root_ndn;	/* the magic "root" normalized dn for this db	*/
  	struct berval be_root_pw;	/* the magic "root" password for this db	*/
  	unsigned int be_max_deref_depth;       /* limit for depth of an alias deref  */
  	int	be_sizelimit;	/* size limit for this backend   	   */
  	int	be_timelimit;	/* time limit for this backend       	   */
  	AccessControl *be_acl;	/* access control list for this backend	   */
  	slap_access_t	be_dfltaccess;	/* access given if no acl matches	   */
  	char	**be_replica;	/* replicas of this backend (in master)	   */
  	char	*be_replogfile;	/* replication log file (in master)	   */
  	char	*be_update_ndn;	/* allowed to make changes (in replicas) */
  	struct berval **be_update_refs;	/* where to refer modifying clients to */
  	int	be_lastmod;	/* keep track of lastmodified{by,time}	   */
  
  	char	*be_realm;
  
  	void	*be_private;	/* anything the backend database needs 	   */
  };
  
  struct slap_conn;
  struct slap_op;
  
  typedef int (*SLAP_EXTENDED_FN) LDAP_P((
      Backend		*be,
      struct slap_conn		*conn,
      struct slap_op		*op,
  	const char		*reqoid,
      struct berval * reqdata,
  	char		**rspoid,
      struct berval ** rspdata,
  	LDAPControl *** rspctrls,
  	const char **	text,
  	struct berval *** refs ));
  
  struct slap_backend_info {
  	char	*bi_type;	/* type of backend */
  
  	/*
  	 * per backend type routines:
  	 * bi_init: called to allocate a backend_info structure,
  	 *		called once BEFORE configuration file is read.
  	 *		bi_init() initializes this structure hence is
  	 *		called directly from be_initialize()
  	 * bi_config: called per 'backend' specific option
  	 *		all such options must before any 'database' options
  	 *		bi_config() is called only from read_config()
  	 * bi_open: called to open each database, called
  	 *		once AFTER configuration file is read but
  	 *		BEFORE any bi_db_open() calls.
  	 *		bi_open() is called from backend_startup()
  	 * bi_close: called to close each database, called
  	 *		once during shutdown after all bi_db_close calls.
  	 *		bi_close() is called from backend_shutdown()
  	 * bi_destroy: called to destroy each database, called
  	 *		once during shutdown after all bi_db_destroy calls.
  	 *		bi_destory() is called from backend_destroy()
  	 */
  	int (*bi_init)	LDAP_P((BackendInfo *bi));
  	int	(*bi_config) LDAP_P((BackendInfo *bi,
  		const char *fname, int lineno, int argc, char **argv ));
  	int (*bi_open) LDAP_P((BackendInfo *bi));
  	int (*bi_close) LDAP_P((BackendInfo *bi));
  	int (*bi_destroy) LDAP_P((BackendInfo *bi));
  
  	/*
  	 * per database routines:
  	 * bi_db_init: called to initialize each database,
  	 *	called upon reading 'database <type>' 
  	 *	called only from backend_db_init()
  	 * bi_db_config: called to configure each database,
  	 *  called per database to handle per database options
  	 *	called only from read_config()
  	 * bi_db_open: called to open each database
  	 *	called once per database immediately AFTER bi_open()
  	 *	calls but before daemon startup.
  	 *  called only by backend_startup()
  	 * bi_db_close: called to close each database
  	 *	called once per database during shutdown but BEFORE
  	 *  any bi_close call.
  	 *  called only by backend_shutdown()
  	 * bi_db_destroy: called to destroy each database
  	 *  called once per database during shutdown AFTER all
  	 *  bi_close calls but before bi_destory calls.
  	 *  called only by backend_destory()
  	 */
  	int (*bi_db_init) LDAP_P((Backend *bd));
  	int	(*bi_db_config) LDAP_P((Backend *bd,
  		const char *fname, int lineno, int argc, char **argv ));
  	int (*bi_db_open) LDAP_P((Backend *bd));
  	int (*bi_db_close) LDAP_P((Backend *bd));
  	int (*bi_db_destroy) LDAP_P((Backend *db));
  
  	/* LDAP Operations Handling Routines */
  	int	(*bi_op_bind)  LDAP_P(( BackendDB *bd,
  		struct slap_conn *c, struct slap_op *o,
  		const char *dn, const char *ndn, int method,
  		struct berval *cred, char** edn ));
  	int (*bi_op_unbind) LDAP_P((BackendDB *bd,
  		struct slap_conn *c, struct slap_op *o ));
  	int	(*bi_op_search) LDAP_P((BackendDB *bd,
  		struct slap_conn *c, struct slap_op *o,
  		const char *base, const char *nbase,
  		int scope, int deref,
  		int slimit, int tlimit,
  		Filter *f, const char *filterstr,
  		char **attrs, int attrsonly));
  	int	(*bi_op_compare)LDAP_P((BackendDB *bd,
  		struct slap_conn *c, struct slap_op *o,
  		const char *dn, const char *ndn,
  		AttributeAssertion *ava));
  	int	(*bi_op_modify) LDAP_P((BackendDB *bd,
  		struct slap_conn *c, struct slap_op *o,
  		const char *dn, const char *ndn, Modifications *m));
  	int	(*bi_op_modrdn) LDAP_P((BackendDB *bd,
  		struct slap_conn *c, struct slap_op *o,
  		const char *dn, const char *ndn,
  		const char *newrdn, int deleteoldrdn,
  		const char *newSuperior));
  	int	(*bi_op_add)    LDAP_P((BackendDB *bd,
  		struct slap_conn *c, struct slap_op *o,
  		Entry *e));
  	int	(*bi_op_delete) LDAP_P((BackendDB *bd,
  		struct slap_conn *c, struct slap_op *o,
  		const char *dn, const char *ndn));
  	int	(*bi_op_abandon) LDAP_P((BackendDB *bd,
  		struct slap_conn *c, struct slap_op *o,
  		ber_int_t msgid));
  
  	/* Extended Operations Helper */
  	SLAP_EXTENDED_FN bi_extended;
  
  	/* Auxilary Functions */
  	int	(*bi_entry_release_rw) LDAP_P((BackendDB *bd, Entry *e, int rw));
  
  	int	(*bi_chk_referrals) LDAP_P((BackendDB *bd,
  		struct slap_conn *c, struct slap_op *o,
  		const char *dn, const char *ndn,
  		const char **text ));
  
  	int	(*bi_acl_group)  LDAP_P((Backend *bd,
  		Entry *e, const char *bdn, const char *edn,
  		ObjectClass *group_oc,
  		AttributeDescription *group_at ));
  	int	(*bi_acl_attribute)  LDAP_P((Backend *bd,
  		struct slap_conn *c, struct slap_op *o,
  		Entry *e, const char *edn,
  		AttributeDescription *entry_at,
  		struct berval ***vals ));
  
  	int	(*bi_connection_init) LDAP_P((BackendDB *bd,
  		struct slap_conn *c));
  	int	(*bi_connection_destroy) LDAP_P((BackendDB *bd,
  		struct slap_conn *c));
  
  	/* hooks for slap tools */
  	int (*bi_tool_entry_open) LDAP_P(( BackendDB *be, int mode ));
  	int (*bi_tool_entry_close) LDAP_P(( BackendDB *be ));
  	ID (*bi_tool_entry_first) LDAP_P(( BackendDB *be ));
  	ID (*bi_tool_entry_next) LDAP_P(( BackendDB *be ));
  	Entry* (*bi_tool_entry_get) LDAP_P(( BackendDB *be, ID id ));
  	ID (*bi_tool_entry_put) LDAP_P(( BackendDB *be, Entry *e ));
  	int (*bi_tool_entry_reindex) LDAP_P(( BackendDB *be, ID id ));
  	int (*bi_tool_sync) LDAP_P(( BackendDB *be ));
  
  #define SLAP_INDEX_ADD_OP		0x0001
  #define SLAP_INDEX_DELETE_OP	0x0002
  
  	char **bi_controls;		/* supported controls */
  
  	unsigned int bi_nDB;	/* number of databases of this type */
  	void	*bi_private;	/* anything the backend type needs */
  };
  
  #define c_authtype	c_authz.sai_method
  #define c_authmech	c_authz.sai_mech
  #define c_dn		c_authz.sai_dn
  #define c_ssf			c_authz.sai_ssf
  #define c_transport_ssf	c_authz.sai_transport_ssf
  #define c_tls_ssf		c_authz.sai_tls_ssf
  #define c_sasl_ssf		c_authz.sai_sasl_ssf
  
  #define o_authtype	o_authz.sai_method
  #define o_authmech	o_authz.sai_mech
  #define o_dn		o_authz.sai_dn
  #define o_ndn		o_authz.sai_ndn
  #define o_ssf			o_authz.sai_ssf
  #define o_transport_ssf	o_authz.sai_transport_ssf
  #define o_tls_ssf		o_authz.sai_tls_ssf
  #define o_sasl_ssf		o_authz.sai_sasl_ssf
  
  /*
   * represents an operation pending from an ldap client
   */
  typedef struct slap_op {
  	ber_int_t	o_opid;		/* id of this operation		  */
  	ber_int_t	o_msgid;	/* msgid of the request		  */
  
  	ldap_pvt_thread_t	o_tid;	/* thread handling this op	  */
  
  	BerElement	*o_ber;		/* ber of the request		  */
  
  	ber_tag_t	o_tag;		/* tag of the request		  */
  	time_t		o_time;		/* time op was initiated	  */
  
  	AuthorizationInformation o_authz;
  
  	ber_int_t	o_protocol;	/* version of the LDAP protocol used by client */
  
  	LDAPControl	**o_ctrls;	 /* controls */
  
  	unsigned long	o_connid; /* id of conn initiating this op  */
  
  	ldap_pvt_thread_mutex_t	o_abandonmutex; /* protects o_abandon  */
  	int		o_abandon;	/* abandon flag */
  
  	struct slap_op	*o_next;	/* next operation in list	  */
  	void	*o_private;	/* anything the backend needs	  */
  } Operation;
  
  /*
   * represents a connection from an ldap client
   */
  typedef struct slap_conn {
  	int			c_struct_state; /* structure management state */
  	int			c_conn_state;	/* connection state */
  
  	ldap_pvt_thread_mutex_t	c_mutex; /* protect the connection */
  	Sockbuf		*c_sb;			/* ber connection stuff		  */
  
  	/* only can be changed by connect_init */
  	time_t		c_starttime;	/* when the connection was opened */
  	time_t		c_activitytime;	/* when the connection was last used */
  	unsigned long		c_connid;	/* id of this connection for stats*/
  
  	char		*c_listener_url;	/* listener URL */
  	char		*c_peer_domain;	/* DNS name of client */
  	char		*c_peer_name;	/* peer name (trans=addr:port) */
  	char		*c_sock_name;	/* sock name (trans=addr:port) */
  
  	/* only can be changed by binding thread */
  	int		c_sasl_bind_in_progress;	/* multi-op bind in progress */
  	char	*c_sasl_bind_mech;			/* mech in progress */
  	char	*c_cdn;
  
  	/* authentication backend */
  	Backend *c_authc_backend;
  
  	/* authorization backend - normally same as c_authc_backend */
  	Backend *c_authz_backend;
  
  	AuthorizationInformation c_authz;
  
  	ber_int_t	c_protocol;	/* version of the LDAP protocol used by client */
  
  	Operation	*c_ops;			/* list of operations being processed */
  	Operation	*c_pending_ops;	/* list of pending operations */
  
  	ldap_pvt_thread_mutex_t	c_write_mutex;	/* only one pdu written at a time */
  	ldap_pvt_thread_cond_t	c_write_cv;		/* used to wait for sd write-ready*/
  
  	BerElement	*c_currentber;	/* ber we're attempting to read */
  	int		c_writewaiter;	/* true if writer is waiting */
  
  #ifdef HAVE_TLS
  	int	c_is_tls;		/* true if this LDAP over raw TLS */
  	int	c_needs_tls_accept;	/* true if SSL_accept should be called */
  #endif
  	int		c_sasl_layers;	 /* true if we need to install SASL i/o handlers */
  	void	*c_sasl_context;	/* SASL session context */
  	void	*c_sasl_extra;		/* SASL session extra stuff */
  
  	long	c_n_ops_received;		/* num of ops received (next op_id) */
  	long	c_n_ops_executing;	/* num of ops currently executing */
  	long	c_n_ops_pending;		/* num of ops pending execution */
  	long	c_n_ops_completed;	/* num of ops completed */
  
  	long	c_n_get;		/* num of get calls */
  	long	c_n_read;		/* num of read calls */
  	long	c_n_write;		/* num of write calls */
  } Connection;
  
  #if defined(LDAP_SYSLOG) && defined(LDAP_DEBUG)
  #define Statslog( level, fmt, connid, opid, arg1, arg2, arg3 )	\
  	do { \
  		if ( ldap_debug & (level) ) \
  			fprintf( stderr, (fmt), (connid), (opid), (arg1), (arg2), (arg3) );\
  		if ( ldap_syslog & (level) ) \
  			syslog( ldap_syslog_level, (fmt), (connid), (opid), (arg1), \
  			        (arg2), (arg3) ); \
  	} while (0)
  #else
  #define Statslog( level, fmt, connid, opid, arg1, arg2, arg3 )
  #endif
  
  LDAP_END_DECL
  
  #include "proto-slap.h"
  
  #endif /* _SLAP_H_ */
  