IPv6 NS: use the mcast rewrite node to fill in the destination MAC

- move the IPv6 incomplete and glean node to ip6_neighbour.c (so it has access to ip6_neighbour_main_t)
- use the RA info config on the interface to find the multicast adj to use

Change-Id: I835e419072abe54fb09dafb0e7eb0a9e50eba1af
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 0 insertions, 263 deletions

diff --git a/src/vnet/ip/ip6_forward.c b/src/vnet/ip/ip6_forward.c
index f4e45a4702a..b53cdc47346 100644
--- a/src/vnet/ip/ip6_forward.c
+++ b/src/vnet/ip/ip6_forward.c
@@ -1400,269 +1400,6 @@ ip6_register_protocol (u32 protocol, u32 node_index)
     vlib_node_add_next (vm, ip6_local_node.index, node_index);
 }
 
-typedef enum
-{
-  IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
-  IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
-  IP6_DISCOVER_NEIGHBOR_N_NEXT,
-} ip6_discover_neighbor_next_t;
-
-typedef enum
-{
-  IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
-  IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
-  IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
-} ip6_discover_neighbor_error_t;
-
-static uword
-ip6_discover_neighbor_inline (vlib_main_t * vm,
-			      vlib_node_runtime_t * node,
-			      vlib_frame_t * frame, int is_glean)
-{
-  vnet_main_t *vnm = vnet_get_main ();
-  ip6_main_t *im = &ip6_main;
-  ip_lookup_main_t *lm = &im->lookup_main;
-  u32 *from, *to_next_drop;
-  uword n_left_from, n_left_to_next_drop;
-  static f64 time_last_seed_change = -1e100;
-  static u32 hash_seeds[3];
-  static uword hash_bitmap[256 / BITS (uword)];
-  f64 time_now;
-  int bogus_length;
-
-  if (node->flags & VLIB_NODE_FLAG_TRACE)
-    ip6_forward_next_trace (vm, node, frame, VLIB_TX);
-
-  time_now = vlib_time_now (vm);
-  if (time_now - time_last_seed_change > 1e-3)
-    {
-      uword i;
-      u32 *r = clib_random_buffer_get_data (&vm->random_buffer,
-					    sizeof (hash_seeds));
-      for (i = 0; i < ARRAY_LEN (hash_seeds); i++)
-	hash_seeds[i] = r[i];
-
-      /* Mark all hash keys as been not-seen before. */
-      for (i = 0; i < ARRAY_LEN (hash_bitmap); i++)
-	hash_bitmap[i] = 0;
-
-      time_last_seed_change = time_now;
-    }
-
-  from = vlib_frame_vector_args (frame);
-  n_left_from = frame->n_vectors;
-
-  while (n_left_from > 0)
-    {
-      vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
-			   to_next_drop, n_left_to_next_drop);
-
-      while (n_left_from > 0 && n_left_to_next_drop > 0)
-	{
-	  vlib_buffer_t *p0;
-	  ip6_header_t *ip0;
-	  u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0;
-	  uword bm0;
-	  ip_adjacency_t *adj0;
-	  vnet_hw_interface_t *hw_if0;
-	  u32 next0;
-
-	  pi0 = from[0];
-
-	  p0 = vlib_get_buffer (vm, pi0);
-
-	  adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
-
-	  ip0 = vlib_buffer_get_current (p0);
-
-	  adj0 = adj_get (adj_index0);
-
-	  if (!is_glean)
-	    {
-	      ip0->dst_address.as_u64[0] =
-		adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
-	      ip0->dst_address.as_u64[1] =
-		adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
-	    }
-
-	  a0 = hash_seeds[0];
-	  b0 = hash_seeds[1];
-	  c0 = hash_seeds[2];
-
-	  sw_if_index0 = adj0->rewrite_header.sw_if_index;
-	  vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
-
-	  a0 ^= sw_if_index0;
-	  b0 ^= ip0->dst_address.as_u32[0];
-	  c0 ^= ip0->dst_address.as_u32[1];
-
-	  hash_v3_mix32 (a0, b0, c0);
-
-	  b0 ^= ip0->dst_address.as_u32[2];
-	  c0 ^= ip0->dst_address.as_u32[3];
-
-	  hash_v3_finalize32 (a0, b0, c0);
-
-	  c0 &= BITS (hash_bitmap) - 1;
-	  c0 = c0 / BITS (uword);
-	  m0 = (uword) 1 << (c0 % BITS (uword));
-
-	  bm0 = hash_bitmap[c0];
-	  drop0 = (bm0 & m0) != 0;
-
-	  /* Mark it as seen. */
-	  hash_bitmap[c0] = bm0 | m0;
-
-	  from += 1;
-	  n_left_from -= 1;
-	  to_next_drop[0] = pi0;
-	  to_next_drop += 1;
-	  n_left_to_next_drop -= 1;
-
-	  hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
-
-	  /* If the interface is link-down, drop the pkt */
-	  if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
-	    drop0 = 1;
-
-	  p0->error =
-	    node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
-			 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
-	  if (drop0)
-	    continue;
-
-	  /*
-	   * the adj has been updated to a rewrite but the node the DPO that got
-	   * us here hasn't - yet. no big deal. we'll drop while we wait.
-	   */
-	  if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
-	    continue;
-
-	  {
-	    u32 bi0 = 0;
-	    icmp6_neighbor_solicitation_header_t *h0;
-	    vlib_buffer_t *b0;
-
-	    h0 = vlib_packet_template_get_packet
-	      (vm, &im->discover_neighbor_packet_template, &bi0);
-
-	    /*
-	     * Build ethernet header.
-	     * Choose source address based on destination lookup
-	     * adjacency.
-	     */
-	    if (!ip6_src_address_for_packet (lm,
-					     sw_if_index0,
-					     &ip0->dst_address,
-					     &h0->ip.src_address))
-	      {
-		/* There is no address on the interface */
-		p0->error =
-		  node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
-		vlib_buffer_free (vm, &bi0, 1);
-		continue;
-	      }
-
-	    /*
-	     * Destination address is a solicited node multicast address.
-	     * We need to fill in
-	     * the low 24 bits with low 24 bits of target's address.
-	     */
-	    h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
-	    h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
-	    h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
-
-	    h0->neighbor.target_address = ip0->dst_address;
-
-	    clib_memcpy (h0->link_layer_option.ethernet_address,
-			 hw_if0->hw_address, vec_len (hw_if0->hw_address));
-
-	    /* $$$$ appears we need this; why is the checksum non-zero? */
-	    h0->neighbor.icmp.checksum = 0;
-	    h0->neighbor.icmp.checksum =
-	      ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
-						 &bogus_length);
-
-	    ASSERT (bogus_length == 0);
-
-	    vlib_buffer_copy_trace_flag (vm, p0, bi0);
-	    b0 = vlib_get_buffer (vm, bi0);
-	    vnet_buffer (b0)->sw_if_index[VLIB_TX]
-	      = vnet_buffer (p0)->sw_if_index[VLIB_TX];
-
-	    /* Add rewrite/encap string. */
-	    vnet_rewrite_one_header (adj0[0], h0, sizeof (ethernet_header_t));
-	    vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);
-
-	    next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
-
-	    vlib_set_next_frame_buffer (vm, node, next0, bi0);
-	  }
-	}
-
-      vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
-			   n_left_to_next_drop);
-    }
-
-  return frame->n_vectors;
-}
-
-static uword
-ip6_discover_neighbor (vlib_main_t * vm,
-		       vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
-  return (ip6_discover_neighbor_inline (vm, node, frame, 0));
-}
-
-static uword
-ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
-  return (ip6_discover_neighbor_inline (vm, node, frame, 1));
-}
-
-static char *ip6_discover_neighbor_error_strings[] = {
-  [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
-  [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
-  [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
-    = "no source address for ND solicitation",
-};
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
-{
-  .function = ip6_discover_neighbor,
-  .name = "ip6-discover-neighbor",
-  .vector_size = sizeof (u32),
-  .format_trace = format_ip6_forward_next_trace,
-  .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
-  .error_strings = ip6_discover_neighbor_error_strings,
-  .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
-  .next_nodes =
-  {
-    [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
-    [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
-  },
-};
-/* *INDENT-ON* */
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (ip6_glean_node) =
-{
-  .function = ip6_glean,
-  .name = "ip6-glean",
-  .vector_size = sizeof (u32),
-  .format_trace = format_ip6_forward_next_trace,
-  .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
-  .error_strings = ip6_discover_neighbor_error_strings,
-  .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
-  .next_nodes =
-  {
-    [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
-    [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
-  },
-};
-/* *INDENT-ON* */
-
 clib_error_t *
 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index)
 {