1 files changed, 47 insertions, 0 deletions
diff --git a/lib/route_opaque.h b/lib/route_opaque.h
new file mode 100644
index 0000000..82ff21c
--- /dev/null
+++ b/lib/route_opaque.h
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Opaque data for Zebra from other daemons.
+ *
+ * Copyright (C) 2021 Donatas Abraitis <donatas.abraitis@gmail.com>
+ */
+
+#ifndef FRR_ROUTE_OPAQUE_H
+#define FRR_ROUTE_OPAQUE_H
+
+#include "assert.h"
+#include "zclient.h"
+
+/* copied from bgpd/bgp_community.h */
+#define COMMUNITY_SIZE 4
+/* copied from bgpd/bgp_lcommunity.h */
+#define LCOMMUNITY_SIZE 12
+/* copied from bgpd/bgp_route.h */
+#define BGP_MAX_SELECTION_REASON_STR_BUF 32
+
+struct bgp_zebra_opaque {
+	char aspath[256];
+
+	/* Show at least 10 communities AA:BB */
+	char community[COMMUNITY_SIZE * 20];
+
+	/* Show at least 10 large-communities AA:BB:CC */
+	char lcommunity[LCOMMUNITY_SIZE * 30];
+
+	/* 32 bytes seems enough because of
+	 * bgp_path_selection_confed_as_path which is
+	 * `Confederation based AS Path`.
+	 */
+	char selection_reason[BGP_MAX_SELECTION_REASON_STR_BUF];
+};
+
+struct ospf_zebra_opaque {
+	char path_type[32];
+	char area_id[INET_ADDRSTRLEN];
+	char tag[16];
+};
+
+static_assert(sizeof(struct bgp_zebra_opaque) <= ZAPI_MESSAGE_OPAQUE_LENGTH,
+              "BGP opaque data shouldn't be larger than zebra's buffer");
+static_assert(sizeof(struct ospf_zebra_opaque) <= ZAPI_MESSAGE_OPAQUE_LENGTH,
+              "OSPF opaque data shouldn't be larger than zebra's buffer");
+
+#endif /* FRR_ROUTE_OPAQUE_H */