IPv6 local-address for P2P ethernet interfaces
[vpp.git] / src / vnet / ip / ip6_neighbor.c
index 3d48c40..62cf23a 100644 (file)
@@ -273,10 +273,23 @@ ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
        {
          n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
          mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
-         fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
-         pool_put (nm->neighbor_pool, n);
+         if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
+           {
+             fib_prefix_t pfx = {
+               .fp_len = 128,
+               .fp_proto = FIB_PROTOCOL_IP6,
+               .fp_addr.ip6 = n->key.ip6_address,
+             };
+             fib_table_entry_path_remove
+               (ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index),
+                &pfx,
+                FIB_SOURCE_ADJ,
+                DPO_PROTO_IP6,
+                &pfx.fp_addr,
+                n->key.sw_if_index, ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
+             pool_put (nm->neighbor_pool, n);
+           }
        }
-
       vec_free (to_delete);
     }
 
@@ -557,7 +570,7 @@ ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
     case IP_LOOKUP_NEXT_PUNT:
     case IP_LOOKUP_NEXT_LOCAL:
     case IP_LOOKUP_NEXT_REWRITE:
-    case IP_LOOKUP_NEXT_LOAD_BALANCE:
+    case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
     case IP_LOOKUP_NEXT_MIDCHAIN:
     case IP_LOOKUP_NEXT_ICMP_ERROR:
     case IP_LOOKUP_N_NEXT:
@@ -582,7 +595,7 @@ vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
   u32 next_index;
   pending_resolution_t *pr, *mc;
 
-  if (os_get_cpu_number ())
+  if (vlib_get_thread_index ())
     {
       set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
                                  1 /* set new neighbor */ , is_static,
@@ -610,6 +623,7 @@ vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
       mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
                 /* old value */ 0);
       n->key = k;
+      n->fib_entry_index = FIB_NODE_INDEX_INVALID;
 
       clib_memcpy (n->link_layer_address,
                   link_layer_address, n_bytes_link_layer_address);
@@ -626,14 +640,17 @@ vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
          };
          u32 fib_index;
 
-         fib_index = ip6_main.fib_index_by_sw_if_index[n->key.sw_if_index];
+         fib_index =
+           ip6_fib_table_get_index_for_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);
+           fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
+                                     FIB_ENTRY_FLAG_ATTACHED,
+                                     DPO_PROTO_IP6, &pfx.fp_addr,
+                                     n->key.sw_if_index, ~0, 1, NULL,
+                                     FIB_ROUTE_PATH_FLAG_NONE);
+       }
+      else
+       {
          n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
        }
     }
@@ -723,7 +740,7 @@ vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
   uword *p;
   int rv = 0;
 
-  if (os_get_cpu_number ())
+  if (vlib_get_thread_index ())
     {
       set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
                                  0 /* unset */ , 0, 0);
@@ -747,7 +764,21 @@ vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
   adj_nbr_walk_nh6 (sw_if_index,
                    &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
 
-  fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
+
+  if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
+    {
+      fib_prefix_t pfx = {
+       .fp_len = 128,
+       .fp_proto = FIB_PROTOCOL_IP6,
+       .fp_addr.ip6 = n->key.ip6_address,
+      };
+      fib_table_entry_path_remove
+       (ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index),
+        &pfx,
+        FIB_SOURCE_ADJ,
+        DPO_PROTO_IP6,
+        &pfx.fp_addr, n->key.sw_if_index, ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
+    }
   pool_put (nm->neighbor_pool, n);
 
 out:
@@ -1001,8 +1032,7 @@ icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
 
              if (ADJ_INDEX_INVALID != src_adj_index0)
                {
-                 ip_adjacency_t *adj0 =
-                   ip_get_adjacency (&im->lookup_main, src_adj_index0);
+                 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
 
                  /* Allow all realistic-looking rewrite adjacencies to pass */
                  ni0 = adj0->lookup_next_index;
@@ -1028,7 +1058,7 @@ icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
 
          /* If src address unspecified or link local, donot learn neighbor MAC */
          if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
-                           !ip6_sadd_unspecified && !ip6_sadd_link_local))
+                           !ip6_sadd_unspecified))
            {
              ip6_neighbor_main_t *nm = &ip6_neighbor_main;
              if (nm->limit_neighbor_cache_size &&
@@ -1041,7 +1071,7 @@ icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
                                              &h0->target_address,
                                              o0->ethernet_address,
                                              sizeof (o0->ethernet_address),
-                                             0, 0);
+                                             0, ip6_sadd_link_local);
            }
 
          if (is_solicitation && error0 == ICMP6_ERROR_NONE)
@@ -1322,8 +1352,7 @@ icmp6_router_solicitation (vlib_main_t * vm,
 
              if (ADJ_INDEX_INVALID != src_adj_index0)
                {
-                 ip_adjacency_t *adj0 = ip_get_adjacency (&im->lookup_main,
-                                                          src_adj_index0);
+                 ip_adjacency_t *adj0 = adj_get (src_adj_index0);
 
                  error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
                            ?
@@ -1450,9 +1479,8 @@ icmp6_router_solicitation (vlib_main_t * vm,
                        sizeof (icmp6_router_advertisement_header_t);
 
                      vlib_buffer_add_data (vm,
-                                           p0->free_list_index,
-                                           bi0,
-                                           (void *) &rh,
+                                           vlib_buffer_get_free_list_index
+                                           (p0), bi0, (void *) &rh,
                                            sizeof
                                            (icmp6_router_advertisement_header_t));
 
@@ -1470,9 +1498,8 @@ icmp6_router_solicitation (vlib_main_t * vm,
                                       eth_if0->address, 6);
 
                          vlib_buffer_add_data (vm,
-                                               p0->free_list_index,
-                                               bi0,
-                                               (void *) &h,
+                                               vlib_buffer_get_free_list_index
+                                               (p0), bi0, (void *) &h,
                                                sizeof
                                                (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
 
@@ -1496,9 +1523,8 @@ icmp6_router_solicitation (vlib_main_t * vm,
                            sizeof (icmp6_neighbor_discovery_mtu_option_t);
 
                          vlib_buffer_add_data (vm,
-                                               p0->free_list_index,
-                                               bi0,
-                                               (void *) &h,
+                                               vlib_buffer_get_free_list_index
+                                               (p0), bi0, (void *) &h,
                                                sizeof
                                                (icmp6_neighbor_discovery_mtu_option_t));
                        }
@@ -1550,7 +1576,7 @@ icmp6_router_solicitation (vlib_main_t * vm,
                             payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
 
                             vlib_buffer_add_data (vm,
-                                                  p0->free_list_index,
+                                           vlib_buffer_get_free_list_index (p0),
                                                   bi0,
                                                   (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
 
@@ -1623,7 +1649,7 @@ icmp6_router_solicitation (vlib_main_t * vm,
                                adj_index0;
                            }
                        }
-                     p0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
+                     p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
 
                      radv_info->n_solicitations_dropped += is_dropped;
                      radv_info->n_solicitations_rcvd += is_solicitation;
@@ -2052,7 +2078,7 @@ ip6_neighbor_add_mld_grp (ip6_radv_t * a,
  * @brief create and initialize router advertisement parameters with default
  * values for this intfc
  */
-static u32
+u32
 ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
                                   u32 sw_if_index, u32 is_add)
 {
@@ -2297,7 +2323,7 @@ ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
     num_addr_records++;
 
     vlib_buffer_add_data
-      (vm, b0->free_list_index, bo0,
+      (vm, vlib_buffer_get_free_list_index (b0), bo0,
        (void *)&rr, sizeof(icmp6_multicast_address_record_t));
 
     payload_length += sizeof( icmp6_multicast_address_record_t);
@@ -2322,7 +2348,7 @@ ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
     vnet_main.local_interface_sw_if_index;
 
   vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
-  b0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
+  b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
 
   vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
 
@@ -3387,7 +3413,8 @@ enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
                    (&link_local_address, eth_if0->address);
 
                  sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
-                 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB)
+                 if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB ||
+                     sw_if0->type == VNET_SW_INTERFACE_TYPE_P2P)
                    {
                      /* make up  an interface id */
                      md5_context_t m;
@@ -3910,76 +3937,59 @@ vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
 {
   ip6_neighbor_main_t *nm = &ip6_neighbor_main;
   ip6_address_t *address = address_arg;
-  uword *p;
+
+  /* Try to find an existing entry */
+  u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address);
+  u32 *p = first;
   pending_resolution_t *mc;
-  void (*fp) (u32, u8 *) = data_callback;
+  while (p && *p != ~0)
+    {
+      mc = pool_elt_at_index (nm->mac_changes, *p);
+      if (mc->node_index == node_index && mc->type_opaque == type_opaque
+         && mc->pid == pid)
+       break;
+      p = &mc->next_index;
+    }
 
+  int found = p && *p != ~0;
   if (is_add)
     {
-      pool_get (nm->mac_changes, mc);
+      if (found)
+       return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
 
-      mc->next_index = ~0;
-      mc->node_index = node_index;
-      mc->type_opaque = type_opaque;
-      mc->data = data;
-      mc->data_callback = data_callback;
-      mc->pid = pid;
+      pool_get (nm->mac_changes, mc);
+      *mc = (pending_resolution_t)
+      {
+      .next_index = ~0,.node_index = node_index,.type_opaque =
+         type_opaque,.data = data,.data_callback = data_callback,.pid =
+         pid,};
 
-      p = mhash_get (&nm->mac_changes_by_address, address);
+      /* Insert new resolution at the end of the list */
+      u32 new_idx = mc - nm->mac_changes;
       if (p)
-       {
-         /* Insert new resolution at the head of the list */
-         mc->next_index = p[0];
-         mhash_unset (&nm->mac_changes_by_address, address, 0);
-       }
-
-      mhash_set (&nm->mac_changes_by_address, address,
-                mc - nm->mac_changes, 0);
-      return 0;
+       p[0] = new_idx;
+      else
+       mhash_set (&nm->mac_changes_by_address, address, new_idx, 0);
     }
   else
     {
-      u32 index;
-      pending_resolution_t *mc_last = 0;
-
-      p = mhash_get (&nm->mac_changes_by_address, address);
-      if (p == 0)
+      if (!found)
        return VNET_API_ERROR_NO_SUCH_ENTRY;
 
-      index = p[0];
+      /* Clients may need to clean up pool entries, too */
+      void (*fp) (u32, u8 *) = data_callback;
+      if (fp)
+       (*fp) (mc->data, 0 /* no new mac addrs */ );
 
-      while (index != (u32) ~ 0)
-       {
-         mc = pool_elt_at_index (nm->mac_changes, index);
-         if (mc->node_index == node_index &&
-             mc->type_opaque == type_opaque && mc->pid == pid)
-           {
-             /* Clients may need to clean up pool entries, too */
-             if (fp)
-               (*fp) (mc->data, 0 /* no new mac addrs */ );
-             if (index == p[0])
-               {
-                 mhash_unset (&nm->mac_changes_by_address, address, 0);
-                 if (mc->next_index != ~0)
-                   mhash_set (&nm->mac_changes_by_address, address,
-                              mc->next_index, 0);
-                 pool_put (nm->mac_changes, mc);
-                 return 0;
-               }
-             else
-               {
-                 ASSERT (mc_last);
-                 mc_last->next_index = mc->next_index;
-                 pool_put (nm->mac_changes, mc);
-                 return 0;
-               }
-           }
-         mc_last = mc;
-         index = mc->next_index;
-       }
+      /* Remove the entry from the list and delete the entry */
+      *p = mc->next_index;
+      pool_put (nm->mac_changes, mc);
 
-      return VNET_API_ERROR_NO_SUCH_ENTRY;
+      /* Remove from hash if we deleted the last entry */
+      if (*p == ~0 && p == first)
+       mhash_unset (&nm->mac_changes_by_address, address, 0);
     }
+  return 0;
 }
 
 int
@@ -4101,7 +4111,7 @@ ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
       fib_table_entry_path_remove (fib_index,
                                   &pfx,
                                   FIB_SOURCE_IP6_ND_PROXY,
-                                  FIB_PROTOCOL_IP6,
+                                  DPO_PROTO_IP6,
                                   &nh,
                                   sw_if_index,
                                   ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
@@ -4115,7 +4125,7 @@ ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
                                &pfx,
                                FIB_SOURCE_IP6_ND_PROXY,
                                FIB_ENTRY_FLAG_NONE,
-                               FIB_PROTOCOL_IP6,
+                               DPO_PROTO_IP6,
                                &nh,
                                sw_if_index,
                                ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
@@ -4180,6 +4190,59 @@ ethernet_ndp_change_mac (u32 sw_if_index)
   /* *INDENT-ON* */
 }
 
+void
+send_ip6_na (vlib_main_t * vm, vnet_hw_interface_t * hi)
+{
+  ip6_main_t *i6m = &ip6_main;
+  u32 sw_if_index = hi->sw_if_index;
+  ip6_address_t *ip6_addr = ip6_interface_first_address (i6m, sw_if_index);
+  if (ip6_addr)
+    {
+      clib_warning
+       ("Sending unsolicitated NA IP6 address %U on sw_if_idex %d",
+        format_ip6_address, ip6_addr, sw_if_index);
+
+      /* Form unsolicited neighbor advertisement packet from NS pkt template */
+      int bogus_length;
+      u32 bi = 0;
+      icmp6_neighbor_solicitation_header_t *h =
+       vlib_packet_template_get_packet (vm,
+                                        &i6m->discover_neighbor_packet_template,
+                                        &bi);
+      ip6_set_reserved_multicast_address (&h->ip.dst_address,
+                                         IP6_MULTICAST_SCOPE_link_local,
+                                         IP6_MULTICAST_GROUP_ID_all_hosts);
+      h->ip.src_address = ip6_addr[0];
+      h->neighbor.icmp.type = ICMP6_neighbor_advertisement;
+      h->neighbor.target_address = ip6_addr[0];
+      h->neighbor.advertisement_flags = clib_host_to_net_u32
+       (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
+      clib_memcpy (h->link_layer_option.ethernet_address,
+                  hi->hw_address, vec_len (hi->hw_address));
+      h->neighbor.icmp.checksum =
+       ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
+      ASSERT (bogus_length == 0);
+
+      /* Setup MAC header with IP6 Etype and mcast DMAC */
+      vlib_buffer_t *b = vlib_get_buffer (vm, bi);
+      vlib_buffer_advance (b, -sizeof (ethernet_header_t));
+      ethernet_header_t *e = vlib_buffer_get_current (b);
+      e->type = clib_host_to_net_u16 (ETHERNET_TYPE_IP6);
+      clib_memcpy (e->src_address, hi->hw_address, sizeof (e->src_address));
+      ip6_multicast_ethernet_address (e->dst_address,
+                                     IP6_MULTICAST_GROUP_ID_all_hosts);
+
+      /* Send unsolicited ND advertisement packet out the specified interface */
+      vnet_buffer (b)->sw_if_index[VLIB_RX] =
+       vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
+      vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
+      u32 *to_next = vlib_frame_vector_args (f);
+      to_next[0] = bi;
+      f->n_vectors = 1;
+      vlib_put_frame_to_node (vm, hi->output_node_index, f);
+    }
+}
+
 /*
  * fd.io coding-style-patch-verification: ON
  *