#include <vppinfra/mhash.h>
#include <vnet/fib/ip4_fib.h>
#include <vnet/adj/adj_nbr.h>
+#include <vnet/adj/adj_mcast.h>
#include <vnet/mpls/mpls.h>
/**
u32 sw_if_index;
ethernet_arp_ip4_over_ethernet_address_t a;
int is_static;
+ int is_no_fib_entry;
int flags;
#define ETHERNET_ARP_ARGS_REMOVE (1<<0)
#define ETHERNET_ARP_ARGS_FLUSH (1<<1)
if (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_DYNAMIC)
flags = format (flags, "D");
+ if (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_NO_FIB_ENTRY)
+ flags = format (flags, "N");
+
s = format (s, "%=12U%=16U%=6s%=20U%=24U",
format_vlib_cpu_time, vnm->vlib_main, e->cpu_time_last_updated,
format_ip4_address, &e->ip4_address,
arp_int = &am->ethernet_arp_by_sw_if_index[sw_if_index];
e = arp_entry_find (arp_int, &adj->sub_type.nbr.next_hop.ip4);
- if (NULL != e)
- {
- adj_nbr_walk_nh4 (sw_if_index,
- &e->ip4_address, arp_mk_complete_walk, e);
- }
- else
+ switch (adj->lookup_next_index)
{
+ case IP_LOOKUP_NEXT_ARP:
+ case IP_LOOKUP_NEXT_GLEAN:
+ if (NULL != e)
+ {
+ adj_nbr_walk_nh4 (sw_if_index,
+ &e->ip4_address, arp_mk_complete_walk, e);
+ }
+ else
+ {
+ /*
+ * no matching ARP entry.
+ * construct the rewrite required to for an ARP packet, and stick
+ * that in the adj's pipe to smoke.
+ */
+ adj_nbr_update_rewrite
+ (ai,
+ ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
+ ethernet_build_rewrite
+ (vnm,
+ sw_if_index,
+ VNET_LINK_ARP,
+ VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
+
+ /*
+ * since the FIB has added this adj for a route, it makes sense it
+ * may want to forward traffic sometime soon. Let's send a
+ * speculative ARP. just one. If we were to do periodically that
+ * wouldn't be bad either, but that's more code than i'm prepared to
+ * write at this time for relatively little reward.
+ */
+ arp_nbr_probe (adj);
+ }
+ break;
+ case IP_LOOKUP_NEXT_MCAST:
/*
- * no matching ARP entry.
- * construct the rewire required to for an ARP packet, and stick
- * that in the adj's pipe to smoke.
+ * Construct a partial rewrite from the known ethernet mcast dest MAC
*/
- adj_nbr_update_rewrite (ai,
- ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
- ethernet_build_rewrite (vnm,
- sw_if_index,
- VNET_LINK_ARP,
- VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
+ adj_mcast_update_rewrite
+ (ai,
+ ethernet_build_rewrite (vnm,
+ sw_if_index,
+ adj->ia_link,
+ ethernet_ip4_mcast_dst_addr ()));
/*
- * since the FIB has added this adj for a route, it makes sense it may
- * want to forward traffic sometime soon. Let's send a speculative ARP.
- * just one. If we were to do periodically that wouldn't be bad either,
- * but that's more code than i'm prepared to write at this time for
- * relatively little reward.
+ * Complete the remaining fields of the adj's rewrite to direct the
+ * complete of the rewrite at switch time by copying in the IP
+ * dst address's bytes.
+ * Ofset is 11 bytes from the end of the MAC header - which is three
+ * bytes into the desintation address. And we write 3 bytes.
*/
- arp_nbr_probe (adj);
+ adj->rewrite_header.dst_mcast_offset = 11;
+ adj->rewrite_header.dst_mcast_n_bytes = 3;
+
+ break;
+
+ case IP_LOOKUP_NEXT_DROP:
+ case IP_LOOKUP_NEXT_PUNT:
+ case IP_LOOKUP_NEXT_LOCAL:
+ case IP_LOOKUP_NEXT_REWRITE:
+ case IP_LOOKUP_NEXT_LOAD_BALANCE:
+ case IP_LOOKUP_NEXT_MIDCHAIN:
+ case IP_LOOKUP_NEXT_ICMP_ERROR:
+ case IP_LOOKUP_N_NEXT:
+ ASSERT (0);
+ break;
}
}
ethernet_arp_interface_t *arp_int;
int is_static = args->is_static;
u32 sw_if_index = args->sw_if_index;
+ int is_no_fib_entry = args->is_no_fib_entry;
vec_validate (am->ethernet_arp_by_sw_if_index, sw_if_index);
if (make_new_arp_cache_entry)
{
- fib_prefix_t pfx = {
- .fp_len = 32,
- .fp_proto = FIB_PROTOCOL_IP4,
- .fp_addr = {
- .ip4 = a->ip4,
- }
- ,
- };
- u32 fib_index;
-
pool_get (am->ip4_entry_pool, e);
if (NULL == arp_int->arp_entries)
clib_memcpy (e->ethernet_address,
a->ethernet, sizeof (e->ethernet_address));
- fib_index = ip4_fib_table_get_index_for_sw_if_index (e->sw_if_index);
- e->fib_entry_index =
- fib_table_entry_update_one_path (fib_index,
- &pfx,
- FIB_SOURCE_ADJ,
- FIB_ENTRY_FLAG_ATTACHED,
- FIB_PROTOCOL_IP4,
- &pfx.fp_addr,
- e->sw_if_index,
- ~0,
- 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
+ if (!is_no_fib_entry)
+ {
+ fib_prefix_t pfx = {
+ .fp_len = 32,
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_addr.ip4 = a->ip4,
+ };
+ u32 fib_index;
+
+ fib_index =
+ ip4_fib_table_get_index_for_sw_if_index (e->sw_if_index);
+ e->fib_entry_index =
+ fib_table_entry_update_one_path (fib_index, &pfx, FIB_SOURCE_ADJ,
+ FIB_ENTRY_FLAG_ATTACHED,
+ FIB_PROTOCOL_IP4, &pfx.fp_addr,
+ e->sw_if_index, ~0, 1, NULL,
+ FIB_ROUTE_PATH_FLAG_NONE);
+ e->flags |= ETHERNET_ARP_IP4_ENTRY_FLAG_NO_FIB_ENTRY;
+ }
}
else
{
_ (missing_interface_address, "ARP missing interface address") \
_ (gratuitous_arp, "ARP probe or announcement dropped") \
_ (interface_no_table, "Interface is not mapped to an IP table") \
+ _ (interface_not_ip_enabled, "Interface is not IP enabled") \
typedef enum
{
sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
+ /* not playing the ARP game if the interface is not IPv4 enabled */
+ error0 =
+ (im4->ip_enabled_by_sw_if_index[sw_if_index0] == 0 ?
+ ETHERNET_ARP_ERROR_interface_not_ip_enabled : error0);
+
if (error0)
goto drop2;
dst_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0),
&arp0->ip4_over_ethernet[1].ip4,
32);
- dst_flags = fib_entry_get_flags_for_source (dst_fei,
- FIB_SOURCE_INTERFACE);
+ dst_flags = fib_entry_get_flags (dst_fei);
- conn_sw_if_index0 =
- fib_entry_get_resolving_interface_for_source (dst_fei,
- FIB_SOURCE_INTERFACE);
+ conn_sw_if_index0 = fib_entry_get_resolving_interface (dst_fei);
if (!(FIB_ENTRY_FLAG_CONNECTED & dst_flags))
{
vnet_arp_set_ip4_over_ethernet (vnm, sw_if_index0,
&arp0->ip4_over_ethernet[0],
- 0 /* is_static */ );
+ 0 /* is_static */ , 0);
error0 = ETHERNET_ARP_ERROR_l3_src_address_learned;
}
{
ethernet_arp_main_t *am = ðernet_arp_main;
+ /* it's safe to delete the ADJ source on the FIB entry, even if it
+ * was added */
fib_table_entry_delete_index (e->fib_entry_index, FIB_SOURCE_ADJ);
hash_unset (eai->arp_entries, e->ip4_address.as_u32);
pool_put (am->ip4_entry_pool, e);
int
vnet_arp_set_ip4_over_ethernet (vnet_main_t * vnm,
- u32 sw_if_index, void *a_arg, int is_static)
+ u32 sw_if_index, void *a_arg,
+ int is_static, int is_no_fib_entry)
{
ethernet_arp_ip4_over_ethernet_address_t *a = a_arg;
vnet_arp_set_ip4_over_ethernet_rpc_args_t args;
args.sw_if_index = sw_if_index;
args.is_static = is_static;
+ args.is_no_fib_entry = is_no_fib_entry;
args.flags = 0;
clib_memcpy (&args.a, a, sizeof (*a));
u32 fib_index = 0;
u32 fib_id;
int is_static = 0;
+ int is_no_fib_entry = 0;
int is_proxy = 0;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
else if (unformat (input, "static"))
is_static = 1;
+ else if (unformat (input, "no-fib-entry"))
+ is_no_fib_entry = 1;
+
else if (unformat (input, "count %d", &count))
;
1 /* type */ , 0 /* data */ );
vnet_arp_set_ip4_over_ethernet
- (vnm, sw_if_index, &addr, is_static);
+ (vnm, sw_if_index, &addr, is_static, is_no_fib_entry);
vlib_process_wait_for_event (vm);
event_type = vlib_process_get_events (vm, &event_data);
VLIB_CLI_COMMAND (ip_arp_add_del_command, static) = {
.path = "set ip arp",
.short_help =
- "set ip arp [del] <intfc> <ip-address> <mac-address> [static] [count <count>] [fib-id <fib-id>] [proxy <lo-addr> - <hi-addr>]",
+ "set ip arp [del] <intfc> <ip-address> <mac-address> [static] [no-fib-entry] [count <count>] [fib-id <fib-id>] [proxy <lo-addr> - <hi-addr>]",
.function = ip_arp_add_del_command_fn,
};
/* *INDENT-ON* */