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-rw-r--r--src/vnet/ethernet/arp.c83
1 files changed, 83 insertions, 0 deletions
diff --git a/src/vnet/ethernet/arp.c b/src/vnet/ethernet/arp.c
index d5dc9cceb39..df68175055e 100644
--- a/src/vnet/ethernet/arp.c
+++ b/src/vnet/ethernet/arp.c
@@ -110,6 +110,9 @@ typedef struct
static const u8 vrrp_prefix[] = { 0x00, 0x00, 0x5E, 0x00, 0x01 };
+/* Node index for send_garp_na_process */
+u32 send_garp_na_process_node_index;
+
static void
set_ip4_over_ethernet_rpc_callback (vnet_arp_set_ip4_over_ethernet_rpc_args_t
* a);
@@ -2378,6 +2381,86 @@ ethernet_arp_change_mac (u32 sw_if_index)
/* *INDENT-ON* */
}
+void static
+send_ip4_garp (vlib_main_t * vm, vnet_hw_interface_t * hi)
+{
+ ip4_main_t *i4m = &ip4_main;
+ u32 sw_if_index = hi->sw_if_index;
+ ip4_address_t *ip4_addr = ip4_interface_first_address (i4m, sw_if_index, 0);
+
+ 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);
+ }
+}
+
+static vlib_node_registration_t send_garp_na_proc_node;
+
+static uword
+send_garp_na_process (vlib_main_t * vm,
+ vlib_node_runtime_t * rt, vlib_frame_t * f)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ uword event_type, *event_data = 0;
+
+ send_garp_na_process_node_index = send_garp_na_proc_node.index;
+
+ while (1)
+ {
+ vlib_process_wait_for_event (vm);
+ event_type = vlib_process_get_events (vm, &event_data);
+ if ((event_type == SEND_GARP_NA) && (vec_len (event_data) >= 1))
+ {
+ u32 hw_if_index = event_data[0];
+ vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
+ send_ip4_garp (vm, hi);
+ send_ip6_na (vm, hi);
+ }
+ vec_reset_length (event_data);
+ }
+ return 0;
+}
+
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (send_garp_na_proc_node, static) = {
+ .function = send_garp_na_process,
+ .type = VLIB_NODE_TYPE_PROCESS,
+ .name = "send-garp-na-process",
+};
+/* *INDENT-ON* */
+
/*
* fd.io coding-style-patch-verification: ON
*