From 0d1232986fa83ed3facd84218e46f9669b1bb50d Mon Sep 17 00:00:00 2001
From: Esben Norby <norby@cvs.openbsd.org>
Date: Mon, 8 Oct 2007 10:44:52 +0000
Subject: Welcome ospf6d

The new ospf6d daemon will support OSPFv3, basically OSPF for IPv6 networks.

It is heavily based on ospfd(8), it is more or less a copy and paste of it.
Currently some unneeded stuff has been removed and the trasition from
IPv4 to IPv6 has begun.

ospf6d is not very usefull at the moment, it is being imported to allow more
people to work on it concurrently.

Not yet connected to the builds.

ok claudio@ dlg@
---
 usr.sbin/ospf6d/area.c | 117 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100644 usr.sbin/ospf6d/area.c

(limited to 'usr.sbin/ospf6d/area.c')

diff --git a/usr.sbin/ospf6d/area.c b/usr.sbin/ospf6d/area.c
new file mode 100644
index 00000000000..31e09e6a030
--- /dev/null
+++ b/usr.sbin/ospf6d/area.c
@@ -0,0 +1,117 @@
+/*	$OpenBSD: area.c,v 1.1 2007/10/08 10:44:50 norby Exp $ */
+
+/*
+ * Copyright (c) 2004, 2005, 2007 Esben Norby <norby@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include <sys/tree.h>
+
+#include <err.h>
+#include <stdlib.h>
+
+#include "ospf6.h"
+#include "ospf6d.h"
+#include "ospfe.h"
+#include "rde.h"
+#include "log.h"
+
+struct area *
+area_new(void)
+{
+	struct area *area = NULL;
+
+	if ((area = calloc(1, sizeof(*area))) == NULL)
+		errx(1, "area_new: calloc");
+
+	LIST_INIT(&area->iface_list);
+	LIST_INIT(&area->nbr_list);
+	RB_INIT(&area->lsa_tree);
+
+	return (area);
+}
+
+int
+area_del(struct area *area)
+{
+	struct iface	*iface = NULL;
+	struct vertex	*v, *nv;
+	struct rde_nbr	*n;
+
+	/* area is removed so neutralize the demotion done by the area */
+	if (area->active == 0)
+		ospfe_demote_area(area, 1);
+
+	/* clean lists */
+	while ((iface = LIST_FIRST(&area->iface_list)) != NULL) {
+		LIST_REMOVE(iface, entry);
+		if_del(iface);
+	}
+
+	while ((n = LIST_FIRST(&area->nbr_list)) != NULL)
+		rde_nbr_del(n);
+
+	for (v = RB_MIN(lsa_tree, &area->lsa_tree); v != NULL; v = nv) {
+		nv = RB_NEXT(lsa_tree, &area->lsa_tree, v);
+		vertex_free(v);
+	}
+
+	free(area);
+
+	return (0);
+}
+
+struct area *
+area_find(struct ospfd_conf *conf, struct in_addr area_id)
+{
+	struct area	*area;
+
+	LIST_FOREACH(area, &conf->area_list, entry) {
+		if (area->id.s_addr == area_id.s_addr) {
+			return (area);
+		}
+	}
+
+	return (NULL);
+}
+
+void
+area_track(struct area *area, int state)
+{
+	int	old = area->active;
+
+	if (state & NBR_STA_FULL)
+		area->active++;
+	else if (area->active == 0)
+		fatalx("area_track: area already inactive");
+	else
+		area->active--;
+
+	if (area->active == 0 || old == 0)
+		ospfe_demote_area(area, old == 0);
+}
+
+int
+area_border_router(struct ospfd_conf *conf)
+{
+	struct area	*area;
+	int		 active = 0;
+
+	LIST_FOREACH(area, &conf->area_list, entry)
+		if (area->active > 0)
+			active++;
+
+	return (active > 1);
+}
-- 
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