1 files changed, 245 insertions, 0 deletions
diff --git a/servers/slapd/operation.c b/servers/slapd/operation.c
new file mode 100644
index 0000000..f3333cf
--- /dev/null
+++ b/servers/slapd/operation.c
@@ -0,0 +1,245 @@
+/* operation.c - routines to deal with pending ldap operations */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* Portions Copyright (c) 1995 Regents of the University of Michigan.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and that due credit is given
+ * to the University of Michigan at Ann Arbor. The name of the University
+ * may not be used to endorse or promote products derived from this
+ * software without specific prior written permission. This software
+ * is provided ``as is'' without express or implied warranty.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/string.h>
+#include <ac/socket.h>
+
+#include "slap.h"
+
+#ifdef LDAP_SLAPI
+#include "slapi/slapi.h"
+#endif
+
+static ldap_pvt_thread_mutex_t	slap_op_mutex;
+static time_t last_time;
+static int last_incr;
+
+void slap_op_init(void)
+{
+	ldap_pvt_thread_mutex_init( &slap_op_mutex );
+}
+
+void slap_op_destroy(void)
+{
+	ldap_pvt_thread_mutex_destroy( &slap_op_mutex );
+}
+
+static void
+slap_op_q_destroy( void *key, void *data )
+{
+	Operation *op, *op2;
+	for ( op = data; op; op = op2 ) {
+		op2 = LDAP_STAILQ_NEXT( op, o_next );
+		ber_memfree_x( op, NULL );
+	}
+}
+
+void
+slap_op_groups_free( Operation *op )
+{
+	GroupAssertion *g, *n;
+	for ( g = op->o_groups; g; g = n ) {
+		n = g->ga_next;
+		slap_sl_free( g, op->o_tmpmemctx );
+	}
+	op->o_groups = NULL;
+}
+
+void
+slap_op_free( Operation *op, void *ctx )
+{
+	OperationBuffer *opbuf;
+
+	assert( LDAP_STAILQ_NEXT(op, o_next) == NULL );
+
+	/* paranoia */
+	op->o_abandon = 1;
+
+	if ( op->o_ber != NULL ) {
+		ber_free( op->o_ber, 1 );
+	}
+	if ( !BER_BVISNULL( &op->o_dn ) ) {
+		ch_free( op->o_dn.bv_val );
+	}
+	if ( !BER_BVISNULL( &op->o_ndn ) ) {
+		ch_free( op->o_ndn.bv_val );
+	}
+	if ( !BER_BVISNULL( &op->o_authmech ) ) {
+		ch_free( op->o_authmech.bv_val );
+	}
+	if ( op->o_ctrls != NULL ) {
+		slap_free_ctrls( op, op->o_ctrls );
+	}
+
+#ifdef LDAP_CONNECTIONLESS
+	if ( op->o_res_ber != NULL ) {
+		ber_free( op->o_res_ber, 1 );
+	}
+#endif
+
+	if ( op->o_groups ) {
+		slap_op_groups_free( op );
+	}
+
+#if defined( LDAP_SLAPI )
+	if ( slapi_plugins_used ) {
+		slapi_int_free_object_extensions( SLAPI_X_EXT_OPERATION, op );
+	}
+#endif /* defined( LDAP_SLAPI ) */
+
+	if ( !BER_BVISNULL( &op->o_csn ) ) {
+		op->o_tmpfree( op->o_csn.bv_val, op->o_tmpmemctx );
+	}
+
+	if ( op->o_pagedresults_state != NULL ) {
+		op->o_tmpfree( op->o_pagedresults_state, op->o_tmpmemctx );
+	}
+
+	/* Selectively zero out the struct. Ignore fields that will
+	 * get explicitly initialized later anyway. Keep o_abandon intact.
+	 */
+	opbuf = (OperationBuffer *) op;
+	op->o_bd = NULL;
+	BER_BVZERO( &op->o_req_dn );
+	BER_BVZERO( &op->o_req_ndn );
+	memset( op->o_hdr, 0, sizeof( *op->o_hdr ));
+	memset( &op->o_request, 0, sizeof( op->o_request ));
+	memset( &op->o_do_not_cache, 0, sizeof( Operation ) - offsetof( Operation, o_do_not_cache ));
+	memset( opbuf->ob_controls, 0, sizeof( opbuf->ob_controls ));
+	op->o_controls = opbuf->ob_controls;
+
+	if ( ctx ) {
+		Operation *op2 = NULL;
+		ldap_pvt_thread_pool_setkey( ctx, (void *)slap_op_free,
+			op, slap_op_q_destroy, (void **)&op2, NULL );
+		LDAP_STAILQ_NEXT( op, o_next ) = op2;
+		if ( op2 ) {
+			op->o_tincr = op2->o_tincr + 1;
+			/* No more than 10 ops on per-thread free list */
+			if ( op->o_tincr > 10 ) {
+				ldap_pvt_thread_pool_setkey( ctx, (void *)slap_op_free,
+					op2, slap_op_q_destroy, NULL, NULL );
+				ber_memfree_x( op, NULL );
+			}
+		} else {
+			op->o_tincr = 1;
+		}
+	} else {
+		ber_memfree_x( op, NULL );
+	}
+}
+
+void
+slap_op_time(time_t *t, int *nop)
+{
+	ldap_pvt_thread_mutex_lock( &slap_op_mutex );
+	*t = slap_get_time();
+	if ( *t == last_time ) {
+		*nop = ++last_incr;
+	} else {
+		last_time = *t;
+		last_incr = 0;
+		*nop = 0;
+	}
+	ldap_pvt_thread_mutex_unlock( &slap_op_mutex );
+}
+
+Operation *
+slap_op_alloc(
+    BerElement		*ber,
+    ber_int_t	msgid,
+    ber_tag_t	tag,
+    ber_int_t	id,
+	void *ctx )
+{
+	Operation	*op = NULL;
+
+	if ( ctx ) {
+		void *otmp = NULL;
+		ldap_pvt_thread_pool_getkey( ctx, (void *)slap_op_free, &otmp, NULL );
+		if ( otmp ) {
+			op = otmp;
+			otmp = LDAP_STAILQ_NEXT( op, o_next );
+			ldap_pvt_thread_pool_setkey( ctx, (void *)slap_op_free,
+				otmp, slap_op_q_destroy, NULL, NULL );
+			op->o_abandon = 0;
+			op->o_cancel = 0;
+		}
+	}
+	if (!op) {
+		op = (Operation *) ch_calloc( 1, sizeof(OperationBuffer) );
+		op->o_hdr = &((OperationBuffer *) op)->ob_hdr;
+		op->o_controls = ((OperationBuffer *) op)->ob_controls;
+	}
+
+	op->o_ber = ber;
+	op->o_msgid = msgid;
+	op->o_tag = tag;
+
+	slap_op_time( &op->o_time, &op->o_tincr );
+	op->o_opid = id;
+
+#if defined( LDAP_SLAPI )
+	if ( slapi_plugins_used ) {
+		slapi_int_create_object_extensions( SLAPI_X_EXT_OPERATION, op );
+	}
+#endif /* defined( LDAP_SLAPI ) */
+
+	return( op );
+}
+
+slap_op_t
+slap_req2op( ber_tag_t tag )
+{
+	switch ( tag ) {
+	case LDAP_REQ_BIND:
+		return SLAP_OP_BIND;
+	case LDAP_REQ_UNBIND:
+		return SLAP_OP_UNBIND;
+	case LDAP_REQ_ADD:
+		return SLAP_OP_ADD;
+	case LDAP_REQ_DELETE:
+		return SLAP_OP_DELETE;
+	case LDAP_REQ_MODRDN:
+		return SLAP_OP_MODRDN;
+	case LDAP_REQ_MODIFY:
+		return SLAP_OP_MODIFY;
+	case LDAP_REQ_COMPARE:
+		return SLAP_OP_COMPARE;
+	case LDAP_REQ_SEARCH:
+		return SLAP_OP_SEARCH;
+	case LDAP_REQ_ABANDON:
+		return SLAP_OP_ABANDON;
+	case LDAP_REQ_EXTENDED:
+		return SLAP_OP_EXTENDED;
+	}
+
+	return SLAP_OP_LAST;
+}