#include <vnet/l2/l2_input.h>
#include <vppinfra/mhash.h>
#include <vnet/fib/ip4_fib.h>
+#include <vnet/fib/fib_entry_src.h>
#include <vnet/adj/adj_nbr.h>
#include <vnet/adj/adj_mcast.h>
#include <vnet/mpls/mpls.h>
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);
if (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_NO_FIB_ENTRY)
flags = format (flags, "N");
- s = format (s, "%=12U%=16U%=6s%=20U%=24U",
+ s = format (s, "%=12U%=16U%=6s%=20U%U",
format_vlib_cpu_time, vnm->vlib_main, e->cpu_time_last_updated,
format_ip4_address, &e->ip4_address,
flags ? (char *) flags : "",
e->fib_entry_index =
fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
FIB_ENTRY_FLAG_ATTACHED,
- FIB_PROTOCOL_IP4, &pfx.fp_addr,
+ DPO_PROTO_IP4, &pfx.fp_addr,
e->sw_if_index, ~0, 1, NULL,
FIB_ROUTE_PATH_FLAG_NONE);
}
32);
dst_flags = fib_entry_get_flags (dst_fei);
- src_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0),
- &arp0->ip4_over_ethernet[0].ip4,
- 32);
- src_flags = fib_entry_get_flags (src_fei);
-
conn_sw_if_index0 = fib_entry_get_resolving_interface (dst_fei);
- if (!(FIB_ENTRY_FLAG_CONNECTED & dst_flags))
- {
- error0 = ETHERNET_ARP_ERROR_l3_dst_address_not_local;
- goto drop1;
- }
-
/* Honor unnumbered interface, if any */
is_unnum0 = sw_if_index0 != conn_sw_if_index0;
- /* Source must also be local to subnet of matching interface address. */
- if (!((FIB_ENTRY_FLAG_ATTACHED & src_flags) ||
- (FIB_ENTRY_FLAG_CONNECTED & src_flags)))
+ {
+ /*
+ * we're looking for FIB entries that indicate the source
+ * is attached. There may be more specific non-attached
+ * routes tht match the source, but these do not influence
+ * whether we respond to an ARP request, i.e. they do not
+ * influence whether we are the correct way for the sender
+ * to reach us, they only affect how we reach the sender.
+ */
+ fib_entry_t *src_fib_entry;
+ fib_entry_src_t *src;
+ fib_source_t source;
+ fib_prefix_t pfx;
+ int attached;
+ int mask;
+
+ mask = 32;
+ attached = 0;
+
+ do
+ {
+ src_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0),
+ &arp0->
+ ip4_over_ethernet[0].ip4,
+ mask);
+ src_fib_entry = fib_entry_get (src_fei);
+
+ /*
+ * It's possible that the source that provides the
+ * flags we need, or the flags we must not have,
+ * is not the best source, so check then all.
+ */
+ /* *INDENT-OFF* */
+ FOR_EACH_SRC_ADDED(src_fib_entry, src, source,
+ ({
+ src_flags = fib_entry_get_flags_for_source (src_fei, source);
+
+ /* Reject requests/replies with our local interface
+ address. */
+ if (FIB_ENTRY_FLAG_LOCAL & src_flags)
+ {
+ error0 = ETHERNET_ARP_ERROR_l3_src_address_is_local;
+ goto drop2;
+ }
+ /* A Source must also be local to subnet of matching
+ * interface address. */
+ if ((FIB_ENTRY_FLAG_ATTACHED & src_flags) ||
+ (FIB_ENTRY_FLAG_CONNECTED & src_flags))
+ {
+ attached = 1;
+ break;
+ }
+ /*
+ * else
+ * The packet was sent from an address that is not
+ * connected nor attached i.e. it is not from an
+ * address that is covered by a link's sub-net,
+ * nor is it a already learned host resp.
+ */
+ }));
+ /* *INDENT-ON* */
+
+ /*
+ * shorter mask lookup for the next iteration.
+ */
+ fib_entry_get_prefix (src_fei, &pfx);
+ mask = pfx.fp_len - 1;
+
+ /*
+ * continue until we hit the default route or we find
+ * the attached we are looking for. The most likely
+ * outcome is we find the attached with the first source
+ * on the first lookup.
+ */
+ }
+ while (!attached &&
+ !fib_entry_is_sourced (src_fei, FIB_SOURCE_DEFAULT_ROUTE));
+
+ if (!attached)
+ {
+ /*
+ * the matching route is a not attached, i.e. it was
+ * added as a result of routing, rather than interface/ARP
+ * configuration. If the matching route is not a host route
+ * (i.e. a /32)
+ */
+ error0 = ETHERNET_ARP_ERROR_l3_src_address_not_local;
+ goto drop2;
+ }
+ }
+
+ if (!(FIB_ENTRY_FLAG_CONNECTED & dst_flags))
{
- /*
- * The packet was sent from an address that is not connected nor attached
- * i.e. it is not from an address that is covered by a link's sub-net,
- * nor is it a already learned host resp.
- */
- error0 = ETHERNET_ARP_ERROR_l3_src_address_not_local;
- goto drop2;
+ error0 = ETHERNET_ARP_ERROR_l3_dst_address_not_local;
+ goto drop1;
}
if (sw_if_index0 != fib_entry_get_resolving_interface (src_fei))
{
/*
* The interface the ARP was received on is not the interface
- * on which the covering prefix is configured. Maybe this is a case
- * for unnumbered.
+ * on which the covering prefix is configured. Maybe this is a
+ * case for unnumbered.
*/
is_unnum0 = 1;
}
- /* Reject requests/replies with our local interface address. */
- if (FIB_ENTRY_FLAG_LOCAL & src_flags)
- {
- error0 = ETHERNET_ARP_ERROR_l3_src_address_is_local;
- goto drop2;
- }
-
dst_is_local0 = (FIB_ENTRY_FLAG_LOCAL & dst_flags);
fib_entry_get_prefix (dst_fei, &pfx0);
if_addr0 = &pfx0.fp_addr.ip4;
fib_table_entry_path_remove (fib_index, &pfx,
FIB_SOURCE_ADJ,
- FIB_PROTOCOL_IP4,
+ DPO_PROTO_IP4,
&pfx.fp_addr,
e->sw_if_index, ~0, 1,
FIB_ROUTE_PATH_FLAG_NONE);
next_l2_feature:
{
- u32 feature_bitmap0 =
- vnet_buffer (p0)->l2.feature_bitmap & ~L2INPUT_FEAT_ARP_TERM;
- vnet_buffer (p0)->l2.feature_bitmap = feature_bitmap0;
- next0 =
- feat_bitmap_get_next_node_index (arp_term_next_node_index,
- feature_bitmap0);
+ next0 = vnet_l2_feature_next (p0, arp_term_next_node_index,
+ L2INPUT_FEAT_ARP_TERM);
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next,
pi0, next0);
/* *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
*
Code Review / vpp.git / blobdiff