diff options
Diffstat (limited to 'src/vnet/ip/ip6_neighbor.c')
| -rw-r--r-- | src/vnet/ip/ip6_neighbor.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/src/vnet/ip/ip6_neighbor.c b/src/vnet/ip/ip6_neighbor.c index ba7ea143..b8f6f9b1 100644 --- a/src/vnet/ip/ip6_neighbor.c +++ b/src/vnet/ip/ip6_neighbor.c @@ -4192,6 +4192,59 @@ 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 * |