staticd: Start the addition of a staticd

This is the start of separating out the static
handling code from zebra -> staticd.  This will
help simplify the zebra code and isolate static
route handling to it's own code base.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

1 files changed, 75 insertions, 0 deletions

diff --git a/staticd/static_nht.c b/staticd/static_nht.c
new file mode 100644
index 0000000000..e6592c9c9e
--- /dev/null
+++ b/staticd/static_nht.c
@@ -0,0 +1,75 @@
+/*
+ * Static NHT code.
+ * Copyright (C) 2018 Cumulus Networks, Inc.
+ *               Donald Sharp
+ *
+ * FRR is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * FRR 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 "prefix.h"
+#include "table.h"
+#include "vrf.h"
+#include "nexthop.h"
+
+#include "static_vrf.h"
+#include "static_routes.h"
+#include "static_zebra.h"
+#include "static_nht.h"
+
+void static_nht_update(struct prefix *p, uint32_t nh_num,
+		       afi_t afi, vrf_id_t vrf_id)
+{
+	struct route_table *stable;
+	struct static_route *si;
+	struct static_vrf *svrf;
+	struct route_node *rn;
+	struct vrf *vrf;
+	bool orig;
+	bool reinstall;
+
+	vrf = vrf_lookup_by_id(vrf_id);
+
+	if (!vrf->info)
+		return;
+
+	svrf = vrf->info;
+	stable = static_vrf_static_table(afi, SAFI_UNICAST, svrf);
+	if (!stable)
+		return;
+
+	for (rn = route_top(stable); rn; rn = route_next(rn)) {
+		reinstall = false;
+		for (si = rn->info; si; si = si->next) {
+			if (si->type != STATIC_IPV4_GATEWAY &&
+			    si->type != STATIC_IPV6_GATEWAY)
+				continue;
+
+			orig = si->nh_valid;
+			if (p->family == AF_INET &&
+			    p->u.prefix4.s_addr == si->addr.ipv4.s_addr)
+				si->nh_valid = !!nh_num;
+
+			if (p->family == AF_INET6 &&
+			    memcmp(&p->u.prefix6, &si->addr.ipv6, 16) == 0)
+				si->nh_valid = !!nh_num;
+
+			if (orig != si->nh_valid)
+				reinstall = true;
+		}
+		if (reinstall)
+			static_zebra_route_add(rn, vrf_id, SAFI_UNICAST, true);
+	}
+}