zebra: VNI and VTEP definition

Define the base data structures for a VxLAN Network Identifier (VNI) and
VxLAN Tunnel End Point (VTEP). These will be used by the EVPN function.

Signed-off-by: Vivek Venkatraman <vivek@cumulusnetworks.com>
Reviewed-by:   Donald Sharp <sharpd@cumulusnetworks.com>

zebra/Makefile.am

@@ -44,7 +44,7 @@ noinst_HEADERS = \
 	zebra_ptm_redistribute.h zebra_ptm.h zebra_routemap.h \
 	zebra_ns.h zebra_vrf.h ioctl_solaris.h zebra_static.h zebra_mpls.h \
 	kernel_netlink.h if_netlink.h zebra_mroute.h label_manager.h \
-	zebra_l2.h
+	zebra_l2.h zebra_vxlan_private.h
 
 zebra_LDADD = $(otherobj) ../lib/libfrr.la $(LIBCAP)
 

zebra/zebra_vxlan_private.h

@@ -0,0 +1,76 @@
+/*
+ * Zebra VxLAN (EVPN) Data structures and definitions
+ * These are "internal" to this function.
+ * Copyright (C) 2016, 2017 Cumulus Networks, Inc.
+ *
+ * This file is part of FRR.
+ *
+ * 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 FRR; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef _ZEBRA_VXLAN_PRIVATE_H
+#define _ZEBRA_VXLAN_PRIVATE_H
+
+#include <zebra.h>
+
+#include <zebra.h>
+
+#include "if.h"
+#include "linklist.h"
+
+/* definitions */
+typedef struct zebra_vni_t_ zebra_vni_t;
+typedef struct zebra_vtep_t_ zebra_vtep_t;
+
+/*
+ * VTEP info
+ *
+ * Right now, this just has each remote VTEP's IP address.
+ */
+struct zebra_vtep_t_
+{
+  /* Remote IP. */
+  /* NOTE: Can only be IPv4 right now. */
+  struct in_addr vtep_ip;
+
+  /* Links. */
+  struct zebra_vtep_t_ *next;
+  struct zebra_vtep_t_ *prev;
+};
+
+
+/*
+ * VNI hash table
+ *
+ * Contains information pertaining to a VNI:
+ * - the list of remote VTEPs (with this VNI)
+ */
+struct zebra_vni_t_
+{
+  /* VNI - key */
+  vni_t vni;
+
+  /* Corresponding VxLAN interface. */
+  struct interface *vxlan_if;
+
+  /* List of remote VTEPs */
+  zebra_vtep_t *vteps;
+
+  /* Local IP */
+  struct in_addr local_vtep_ip;
+};
+
+#endif /* _ZEBRA_VXLAN_PRIVATE_H */