IMplementation for option to not create a FIB table entry when adding a neighbor...

[vpp.git] / src / vnet / ip / ip6_neighbor.c

diff --git a/src/vnet/ip/ip6_neighbor.c b/src/vnet/ip/ip6_neighbor.c
index 715891b..8d355ab 100644 (file)
--- a/src/vnet/ip/ip6_neighbor.c
+++ b/src/vnet/ip/ip6_neighbor.c
@@ -235,6 +235,9 @@ format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
   if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
     flags = format (flags, "S");
 
+  if (n->flags & IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY)
+    flags = format (flags, "N");
+
   si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
   s = format (s, "%=12U%=20U%=6s%=20U%=40U",
              format_vlib_cpu_time, vm, n->cpu_time_last_updated,
@@ -317,6 +320,7 @@ typedef struct
 {
   u8 is_add;
   u8 is_static;
+  u8 is_no_fib_entry;
   u8 link_layer_address[6];
   u32 sw_if_index;
   ip6_address_t addr;
@@ -328,7 +332,8 @@ static void ip6_neighbor_set_unset_rpc_callback
 static void set_unset_ip6_neighbor_rpc
   (vlib_main_t * vm,
    u32 sw_if_index,
-   ip6_address_t * a, u8 * link_layer_address, int is_add, int is_static)
+   ip6_address_t * a, u8 * link_layer_address, int is_add, int is_static,
+   int is_no_fib_entry)
 {
   ip6_neighbor_set_unset_rpc_args_t args;
   void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
@@ -336,6 +341,7 @@ static void set_unset_ip6_neighbor_rpc
   args.sw_if_index = sw_if_index;
   args.is_add = is_add;
   args.is_static = is_static;
+  args.is_no_fib_entry = is_no_fib_entry;
   clib_memcpy (&args.addr, a, sizeof (*a));
   if (NULL != link_layer_address)
     clib_memcpy (args.link_layer_address, link_layer_address, 6);
@@ -565,7 +571,7 @@ vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
                                ip6_address_t * a,
                                u8 * link_layer_address,
                                uword n_bytes_link_layer_address,
-                               int is_static)
+                               int is_static, int is_no_fib_entry)
 {
   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
   ip6_neighbor_key_t k;
@@ -578,7 +584,8 @@ vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
   if (os_get_cpu_number ())
     {
       set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
-                                 1 /* set new neighbor */ , is_static);
+                                 1 /* set new neighbor */ , is_static,
+                                 is_no_fib_entry);
       return 0;
     }
 
@@ -598,16 +605,6 @@ vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
 
   if (make_new_nd_cache_entry)
     {
-      fib_prefix_t pfx = {
-       .fp_len = 128,
-       .fp_proto = FIB_PROTOCOL_IP6,
-       .fp_addr = {
-                   .ip6 = k.ip6_address,
-                   }
-       ,
-      };
-      u32 fib_index;
-
       pool_get (nm->neighbor_pool, n);
       mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
                 /* old value */ 0);
@@ -619,9 +616,25 @@ vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
       /*
        * create the adj-fib. the entry in the FIB table for and to the peer.
        */
-      fib_index = ip6_main.fib_index_by_sw_if_index[n->key.sw_if_index];
-      n->fib_entry_index = fib_table_entry_update_one_path (fib_index, &pfx, FIB_SOURCE_ADJ, FIB_ENTRY_FLAG_NONE, FIB_PROTOCOL_IP6, &pfx.fp_addr, n->key.sw_if_index, ~0, 1, NULL,     // no label stack
-                                                           FIB_ROUTE_PATH_FLAG_NONE);
+      if (!is_no_fib_entry)
+       {
+         fib_prefix_t pfx = {
+           .fp_len = 128,
+           .fp_proto = FIB_PROTOCOL_IP6,
+           .fp_addr.ip6 = k.ip6_address,
+         };
+         u32 fib_index;
+
+         fib_index = ip6_main.fib_index_by_sw_if_index[n->key.sw_if_index];
+         n->fib_entry_index =
+           fib_table_entry_update_one_path (fib_index, &pfx,
+                                            FIB_SOURCE_ADJ,
+                                            FIB_ENTRY_FLAG_NONE,
+                                            FIB_PROTOCOL_IP6, &pfx.fp_addr,
+                                            n->key.sw_if_index, ~0, 1, NULL,
+                                            FIB_ROUTE_PATH_FLAG_NONE);
+         n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
+       }
     }
   else
     {
@@ -712,7 +725,7 @@ vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
   if (os_get_cpu_number ())
     {
       set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
-                                 0 /* unset */ , 0);
+                                 0 /* unset */ , 0, 0);
       return 0;
     }
 
@@ -746,7 +759,8 @@ static void ip6_neighbor_set_unset_rpc_callback
   vlib_main_t *vm = vlib_get_main ();
   if (a->is_add)
     vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
-                                   a->link_layer_address, 6, a->is_static);
+                                   a->link_layer_address, 6, a->is_static,
+                                   a->is_no_fib_entry);
   else
     vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
                                      a->link_layer_address, 6);
@@ -850,6 +864,7 @@ set_ip6_neighbor (vlib_main_t * vm,
   int addr_valid = 0;
   int is_del = 0;
   int is_static = 0;
+  int is_no_fib_entry = 0;
   u32 sw_if_index;
 
   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
@@ -865,6 +880,8 @@ set_ip6_neighbor (vlib_main_t * vm,
        is_del = 1;
       else if (unformat (input, "static"))
        is_static = 1;
+      else if (unformat (input, "no-fib-entry"))
+       is_no_fib_entry = 1;
       else
        break;
     }
@@ -875,7 +892,7 @@ set_ip6_neighbor (vlib_main_t * vm,
   if (!is_del)
     vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
                                    mac_address, sizeof (mac_address),
-                                   is_static);
+                                   is_static, is_no_fib_entry);
   else
     vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
                                      mac_address, sizeof (mac_address));
@@ -1023,7 +1040,7 @@ icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
                                              &h0->target_address,
                                              o0->ethernet_address,
                                              sizeof (o0->ethernet_address),
-                                             0);
+                                             0, 0);
            }
 
          if (is_solicitation && error0 == ICMP6_ERROR_NONE)
@@ -1338,7 +1355,7 @@ icmp6_router_solicitation (vlib_main_t * vm,
                                              &ip0->src_address,
                                              o0->ethernet_address,
                                              sizeof (o0->ethernet_address),
-                                             0);
+                                             0, 0);
            }
 
          /* default is to drop */