ARP/NDP does not send solicitation when no source address is available

[vpp.git] / vnet / vnet / ip / ip4_forward.c

diff --git a/vnet/vnet/ip/ip4_forward.c b/vnet/vnet/ip/ip4_forward.c
index 3075e0c..08a1785 100644 (file)
--- a/vnet/vnet/ip/ip4_forward.c
+++ b/vnet/vnet/ip/ip4_forward.c
@@ -2373,7 +2373,12 @@ ip4_arp (vlib_main_t * vm,
            clib_memcpy (h0->ip4_over_ethernet[0].ethernet, hw_if0->hw_address,
                    sizeof (h0->ip4_over_ethernet[0].ethernet));
 
-           ip4_src_address_for_packet (im, p0, &h0->ip4_over_ethernet[0].ip4, sw_if_index0);
+           if (ip4_src_address_for_packet (im, p0, &h0->ip4_over_ethernet[0].ip4, sw_if_index0)) {
+               //No source address available
+               p0->error = node->errors[IP4_ARP_ERROR_NO_SOURCE_ADDRESS];
+               vlib_buffer_free(vm, &bi0, 1);
+               continue;
+           }
 
            /* Copy in destination address we are requesting. */
            h0->ip4_over_ethernet[1].ip4.data_u32 = ip0->dst_address.data_u32;
@@ -2400,6 +2405,7 @@ static char * ip4_arp_error_strings[] = {
   [IP4_ARP_ERROR_NON_ARP_ADJ] = "ARPs to non-ARP adjacencies",
   [IP4_ARP_ERROR_REPLICATE_DROP] = "ARP replication completed",
   [IP4_ARP_ERROR_REPLICATE_FAIL] = "ARP replication failed",
+  [IP4_ARP_ERROR_NO_SOURCE_ADDRESS] = "no source address for ARP request",
 };
 
 VLIB_REGISTER_NODE (ip4_arp_node) = {