map.c

来自「ldap服务器源码」· C语言 代码 · 共 805 行 · 第 1/2 页

			fstr->bv_len += vtmp.bv_len;
			fstr->bv_val = ch_realloc( fstr->bv_val, fstr->bv_len + 1 );

			snprintf( &fstr->bv_val[len - 2], vtmp.bv_len + 3,
				/* "(attr=" */ "%s*)",
				vtmp.bv_val );

			ber_memfree( vtmp.bv_val );
		}

		if ( f->f_sub_any != NULL ) {
			for ( i = 0; !BER_BVISNULL( &f->f_sub_any[i] ); i++ ) {
				len = fstr->bv_len;
				filter_escape_value( &f->f_sub_any[i], &vtmp );

				fstr->bv_len += vtmp.bv_len + 1;
				fstr->bv_val = ch_realloc( fstr->bv_val, fstr->bv_len + 1 );

				snprintf( &fstr->bv_val[len - 1], vtmp.bv_len + 3,
					/* "(attr=[init]*[any*]" */ "%s*)",
					vtmp.bv_val );
				ber_memfree( vtmp.bv_val );
			}
		}

		if ( !BER_BVISNULL( &f->f_sub_final ) ) {
			len = fstr->bv_len;

			filter_escape_value( &f->f_sub_final, &vtmp );

			fstr->bv_len += vtmp.bv_len;
			fstr->bv_val = ch_realloc( fstr->bv_val, fstr->bv_len + 1 );

			snprintf( &fstr->bv_val[len - 1], vtmp.bv_len + 3,
				/* "(attr=[init*][any*]" */ "%s)",
				vtmp.bv_val );

			ber_memfree( vtmp.bv_val );
		}

		break;

	case LDAP_FILTER_PRESENT:
		if ( map_attr_value( dc, f->f_desc, &atmp,
					NULL, NULL, remap ) )
		{
			goto computed;
		}

		fstr->bv_len = atmp.bv_len + ( STRLENOF( "(=*)" ) );
		fstr->bv_val = malloc( fstr->bv_len + 1 );

		snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s=*)",
			atmp.bv_val );
		break;

	case LDAP_FILTER_AND:
	case LDAP_FILTER_OR:
	case LDAP_FILTER_NOT:
		fstr->bv_len = STRLENOF( "(%)" );
		fstr->bv_val = malloc( fstr->bv_len + 128 );	/* FIXME: why 128? */

		snprintf( fstr->bv_val, fstr->bv_len + 1, "(%c)",
			f->f_choice == LDAP_FILTER_AND ? '&' :
			f->f_choice == LDAP_FILTER_OR ? '|' : '!' );

		for ( p = f->f_list; p != NULL; p = p->f_next ) {
			int	rc;

			len = fstr->bv_len;

			rc = ldap_back_int_filter_map_rewrite( dc, p, &vtmp, remap );
			if ( rc != LDAP_SUCCESS ) {
				return rc;
			}
			
			fstr->bv_len += vtmp.bv_len;
			fstr->bv_val = ch_realloc( fstr->bv_val, fstr->bv_len + 1 );

			snprintf( &fstr->bv_val[len-1], vtmp.bv_len + 2, 
				/*"("*/ "%s)", vtmp.bv_val );

			ch_free( vtmp.bv_val );
		}

		break;

	case LDAP_FILTER_EXT:
		if ( f->f_mr_desc ) {
			if ( map_attr_value( dc, f->f_mr_desc, &atmp,
						&f->f_mr_value, &vtmp, remap ) )
			{
				goto computed;
			}

		} else {
			BER_BVSTR( &atmp, "" );
			filter_escape_value( &f->f_mr_value, &vtmp );
		}

		/* FIXME: cleanup (less ?: operators...) */
		fstr->bv_len = atmp.bv_len +
			( f->f_mr_dnattrs ? STRLENOF( ":dn" ) : 0 ) +
			( !BER_BVISEMPTY( &f->f_mr_rule_text ) ? f->f_mr_rule_text.bv_len + 1 : 0 ) +
			vtmp.bv_len + ( STRLENOF( "(:=)" ) );
		fstr->bv_val = malloc( fstr->bv_len + 1 );

		snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s%s%s%s:=%s)",
			atmp.bv_val,
			f->f_mr_dnattrs ? ":dn" : "",
			!BER_BVISEMPTY( &f->f_mr_rule_text ) ? ":" : "",
			!BER_BVISEMPTY( &f->f_mr_rule_text ) ? f->f_mr_rule_text.bv_val : "",
			vtmp.bv_val );
		ber_memfree( vtmp.bv_val );
		break;

	case SLAPD_FILTER_COMPUTED:
		switch ( f->f_result ) {
		case LDAP_COMPARE_FALSE:
		/* FIXME: treat UNDEFINED as FALSE */
		case SLAPD_COMPARE_UNDEFINED:
computed:;
			if ( META_BACK_TGT_T_F( dc->target ) ) {
				tmp = &ber_bvtf_false;
				break;
			}
			tmp = &ber_bvfalse;
			break;

		case LDAP_COMPARE_TRUE:
			if ( META_BACK_TGT_T_F( dc->target ) ) {
				tmp = &ber_bvtf_true;
				break;
			}

			tmp = &ber_bvtrue;
			break;

		default:
			tmp = &ber_bverror;
			break;
		}

		ber_dupbv( fstr, tmp );
		break;

	default:
		ber_dupbv( fstr, &ber_bvunknown );
		break;
	}

	return 0;
}

int
ldap_back_filter_map_rewrite(
		dncookie		*dc,
		Filter			*f,
		struct berval		*fstr,
		int			remap )
{
	int		rc;
	dncookie	fdc;
	struct berval	ftmp;
	static char	*dmy = "";

	rc = ldap_back_int_filter_map_rewrite( dc, f, fstr, remap );

#ifdef ENABLE_REWRITE
	if ( rc != LDAP_SUCCESS ) {
		return rc;
	}

	fdc = *dc;
	ftmp = *fstr;

	fdc.ctx = "searchFilter";
	
	switch ( rewrite_session( fdc.target->mt_rwmap.rwm_rw, fdc.ctx,
				( !BER_BVISEMPTY( &ftmp ) ? ftmp.bv_val : dmy ),
				fdc.conn, &fstr->bv_val ) )
	{
	case REWRITE_REGEXEC_OK:
		if ( !BER_BVISNULL( fstr ) ) {
			fstr->bv_len = strlen( fstr->bv_val );

		} else {
			*fstr = ftmp;
		}
		Debug( LDAP_DEBUG_ARGS,
			"[rw] %s: \"%s\" -> \"%s\"\n",
			fdc.ctx, BER_BVISNULL( &ftmp ) ? "" : ftmp.bv_val,
			BER_BVISNULL( fstr ) ? "" : fstr->bv_val );		
		rc = LDAP_SUCCESS;
		break;
 		
 	case REWRITE_REGEXEC_UNWILLING:
		if ( fdc.rs ) {
			fdc.rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
			fdc.rs->sr_text = "Operation not allowed";
		}
		rc = LDAP_UNWILLING_TO_PERFORM;
		break;
	       	
	case REWRITE_REGEXEC_ERR:
		if ( fdc.rs ) {
			fdc.rs->sr_err = LDAP_OTHER;
			fdc.rs->sr_text = "Rewrite error";
		}
		rc = LDAP_OTHER;
		break;
	}

	if ( fstr->bv_val == dmy ) {
		BER_BVZERO( fstr );
	}
#endif /* ENABLE_REWRITE */

	return rc;
}

int
ldap_back_referral_result_rewrite(
	dncookie		*dc,
	BerVarray		a_vals
)
{
	int		i, last;

	assert( dc != NULL );
	assert( a_vals != NULL );

	for ( last = 0; !BER_BVISNULL( &a_vals[ last ] ); last++ )
		;
	last--;

	for ( i = 0; !BER_BVISNULL( &a_vals[ i ] ); i++ ) {
		struct berval	dn,
				olddn = BER_BVNULL;
		int		rc;
		LDAPURLDesc	*ludp;

		rc = ldap_url_parse( a_vals[ i ].bv_val, &ludp );
		if ( rc != LDAP_URL_SUCCESS ) {
			/* leave attr untouched if massage failed */
			continue;
		}

		/* FIXME: URLs like "ldap:///dc=suffix" if passed
		 * thru ldap_url_parse() and ldap_url_desc2str()
		 * get rewritten as "ldap:///dc=suffix??base";
		 * we don't want this to occur... */
		if ( ludp->lud_scope == LDAP_SCOPE_BASE ) {
			ludp->lud_scope = LDAP_SCOPE_DEFAULT;
		}

		ber_str2bv( ludp->lud_dn, 0, 0, &olddn );
		
		rc = ldap_back_dn_massage( dc, &olddn, &dn );
		switch ( rc ) {
		case LDAP_UNWILLING_TO_PERFORM:
			/*
			 * FIXME: need to check if it may be considered 
			 * legal to trim values when adding/modifying;
			 * it should be when searching (e.g. ACLs).
			 */
			LBER_FREE( a_vals[ i ].bv_val );
			if ( last > i ) {
				a_vals[ i ] = a_vals[ last ];
			}
			BER_BVZERO( &a_vals[ last ] );
			last--;
			i--;
			break;

		default:
			/* leave attr untouched if massage failed */
			if ( !BER_BVISNULL( &dn ) && olddn.bv_val != dn.bv_val )
			{
				char	*newurl;

				ludp->lud_dn = dn.bv_val;
				newurl = ldap_url_desc2str( ludp );
				free( dn.bv_val );
				if ( newurl == NULL ) {
					/* FIXME: leave attr untouched
					 * even if ldap_url_desc2str failed...
					 */
					break;
				}

				LBER_FREE( a_vals[ i ].bv_val );
				ber_str2bv( newurl, 0, 1, &a_vals[ i ] );
				LDAP_FREE( newurl );
				ludp->lud_dn = olddn.bv_val;
			}
			break;
		}

		ldap_free_urldesc( ludp );
	}

	return 0;
}

/*
 * I don't like this much, but we need two different
 * functions because different heap managers may be
 * in use in back-ldap/meta to reduce the amount of
 * calls to malloc routines, and some of the free()
 * routines may be macros with args
 */
int
ldap_dnattr_rewrite(
	dncookie		*dc,
	BerVarray		a_vals
)
{
	struct berval	bv;
	int		i, last;

	assert( a_vals != NULL );

	for ( last = 0; !BER_BVISNULL( &a_vals[last] ); last++ )
		;
	last--;

	for ( i = 0; !BER_BVISNULL( &a_vals[i] ); i++ ) {
		switch ( ldap_back_dn_massage( dc, &a_vals[i], &bv ) ) {
		case LDAP_UNWILLING_TO_PERFORM:
			/*
			 * FIXME: need to check if it may be considered 
			 * legal to trim values when adding/modifying;
			 * it should be when searching (e.g. ACLs).
			 */
			ch_free( a_vals[i].bv_val );
			if ( last > i ) {
				a_vals[i] = a_vals[last];
			}
			BER_BVZERO( &a_vals[last] );
			last--;
			break;

		default:
			/* leave attr untouched if massage failed */
			if ( !BER_BVISNULL( &bv ) && bv.bv_val != a_vals[i].bv_val ) {
				ch_free( a_vals[i].bv_val );
				a_vals[i] = bv;
			}
			break;
		}
	}
	
	return 0;
}

int
ldap_dnattr_result_rewrite(
	dncookie		*dc,
	BerVarray		a_vals
)
{
	struct berval	bv;
	int		i, last;

	assert( a_vals != NULL );

	for ( last = 0; !BER_BVISNULL( &a_vals[last] ); last++ )
		;
	last--;

	for ( i = 0; !BER_BVISNULL( &a_vals[i] ); i++ ) {
		switch ( ldap_back_dn_massage( dc, &a_vals[i], &bv ) ) {
		case LDAP_UNWILLING_TO_PERFORM:
			/*
			 * FIXME: need to check if it may be considered 
			 * legal to trim values when adding/modifying;
			 * it should be when searching (e.g. ACLs).
			 */
			LBER_FREE( a_vals[i].bv_val );
			if ( last > i ) {
				a_vals[i] = a_vals[last];
			}
			BER_BVZERO( &a_vals[last] );
			last--;
			break;

		default:
			/* leave attr untouched if massage failed */
			if ( !BER_BVISNULL( &bv ) && a_vals[i].bv_val != bv.bv_val ) {
				LBER_FREE( a_vals[i].bv_val );
				a_vals[i] = bv;
			}
			break;
		}
	}

	return 0;
}