diff options
Diffstat (limited to 'src/vnet/ethernet/arp.c')
| -rw-r--r-- | src/vnet/ethernet/arp.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/src/vnet/ethernet/arp.c b/src/vnet/ethernet/arp.c index d5dc9cce..df681750 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 * |