+
+ ai = adj_glean_get (FIB_PROTOCOL_IP4, sw_if_index);
+
+ if (ADJ_INDEX_INVALID != ai)
+ adj_glean_update_rewrite (ai);
+}
+
+void
+send_ip4_garp (vlib_main_t * vm, const vnet_hw_interface_t * hi)
+{
+ ip4_main_t *i4m = &ip4_main;
+ ip4_address_t *ip4_addr =
+ ip4_interface_first_address (i4m, hi->sw_if_index, 0);
+
+ send_ip4_garp_w_addr (vm, ip4_addr, hi);
+}
+
+void
+send_ip4_garp_w_addr (vlib_main_t * vm,
+ const ip4_address_t * ip4_addr,
+ const vnet_hw_interface_t * hi)
+{
+ ip4_main_t *i4m = &ip4_main;
+ u32 sw_if_index = hi->sw_if_index;
+
+ if (ip4_addr)
+ {
+ clib_warning ("Sending GARP for IP4 address %U on sw_if_idex %d",
+ format_ip4_address, ip4_addr, sw_if_index);
+
+ /* Form GARP packet for output - Gratuitous ARP is an ARP request packet
+ where the interface IP/MAC pair is used for both source and request
+ MAC/IP pairs in the request */
+ u32 bi = 0;
+ ethernet_arp_header_t *h = vlib_packet_template_get_packet
+ (vm, &i4m->ip4_arp_request_packet_template, &bi);
+ clib_memcpy (h->ip4_over_ethernet[0].ethernet, hi->hw_address,
+ sizeof (h->ip4_over_ethernet[0].ethernet));
+ clib_memcpy (h->ip4_over_ethernet[1].ethernet, hi->hw_address,
+ sizeof (h->ip4_over_ethernet[1].ethernet));
+ h->ip4_over_ethernet[0].ip4 = ip4_addr[0];
+ h->ip4_over_ethernet[1].ip4 = ip4_addr[0];
+
+ /* Setup MAC header with ARP Etype and broadcast 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_ARP);
+ clib_memcpy (e->src_address, hi->hw_address, sizeof (e->src_address));
+ memset (e->dst_address, 0xff, sizeof (e->dst_address));
+
+ /* Send GARP 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);
+ }