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)
{
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