zebra: MAC and Neighbor (ARP/ND) handling

Implement handling of MACs and Neighbors (ARP/ND entries) in zebra:
- MAC and Neighbor database handlers
- Read MACs and Neighbors from the kernel, when needed and create
entries in zebra's MAC and Neighbor databases.
- Handle add/update/delete notifications from the kernel for MACs and
Neighbors and update zebra's database appropriately
- Inform locally learnt MACs and Neighbors to client
- Handle MACIP add/delete from client and install appriporiate entries
into the kernel
- Since Neighbor entries will be installed on an SVI, implement the
needed mappings

NOTE: kernel interface is only implemented for Linux/netlink

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

1 files changed, 25 insertions, 0 deletions

diff --git a/zebra/rt_socket.c b/zebra/rt_socket.c
index bf7e3403e..c03ed27c6 100644
--- a/zebra/rt_socket.c
+++ b/zebra/rt_socket.c
@@ -441,3 +441,28 @@ kernel_del_vtep (vni_t vni, struct interface *ifp, struct in_addr *vtep_ip)
 {
   return 0;
 }
+
+int
+kernel_add_mac (struct interface *ifp, vlanid_t vid,
+                struct ethaddr *mac, struct in_addr vtep_ip)
+{
+  return 0;
+}
+
+int
+kernel_del_mac (struct interface *ifp, vlanid_t vid,
+                struct ethaddr *mac, struct in_addr vtep_ip, int local)
+{
+  return 0;
+}
+
+int kernel_add_neigh (struct interface *ifp, struct ipaddr *ip,
+                      struct ethaddr *mac)
+{
+  return 0;
+}
+
+int kernel_del_neigh (struct interface *ifp, struct ipaddr *ip)
+{
+  return 0;
+}