1 files changed, 77 insertions, 0 deletions
diff --git a/isisd/isis_flags.c b/isisd/isis_flags.c
new file mode 100644
index 0000000..b1ece94
--- /dev/null
+++ b/isisd/isis_flags.c
@@ -0,0 +1,77 @@
+/*
+ * IS-IS Rout(e)ing protocol - isis_flags.c
+ *                             Routines for manipulation of SSN and SRM flags
+ *
+ * Copyright (C) 2001,2002   Sampo Saaristo
+ *                           Tampere University of Technology
+ *                           Institute of Communications Engineering
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public Licenseas published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <zebra.h>
+#include "log.h"
+#include "linklist.h"
+
+#include "isisd/isis_constants.h"
+#include "isisd/isis_common.h"
+#include "isisd/isis_flags.h"
+
+void flags_initialize(struct flags *flags)
+{
+	flags->maxindex = 0;
+	flags->free_idcs = NULL;
+}
+
+long int flags_get_index(struct flags *flags)
+{
+	struct listnode *node;
+	long int index;
+
+	if (flags->free_idcs == NULL || flags->free_idcs->count == 0) {
+		index = flags->maxindex++;
+	} else {
+		node = listhead(flags->free_idcs);
+		index = (long int)listgetdata(node);
+		listnode_delete(flags->free_idcs, (void *)index);
+		index--;
+	}
+
+	return index;
+}
+
+void flags_free_index(struct flags *flags, long int index)
+{
+	if (index + 1 == flags->maxindex) {
+		flags->maxindex--;
+		return;
+	}
+
+	if (flags->free_idcs == NULL) {
+		flags->free_idcs = list_new();
+	}
+
+	listnode_add(flags->free_idcs, (void *)(index + 1));
+
+	return;
+}
+
+int flags_any_set(uint32_t *flags)
+{
+	uint32_t zero[ISIS_MAX_CIRCUITS];
+	memset(zero, 0x00, ISIS_MAX_CIRCUITS * 4);
+
+	return bcmp(flags, zero, ISIS_MAX_CIRCUITS * 4);
+}