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authorNeale Ranns <nranns@cisco.com>2017-03-08 05:17:22 -0800
committerDamjan Marion <dmarion.lists@gmail.com>2017-03-09 15:34:14 +0000
commitb3b2de71ceea0cc7ce18f89cc8180ed4a42e355d (patch)
treeda9a025096839fef6d749459c28f786327226d13 /src/vnet/ethernet/arp.c
parent8082380922c65702251d5242058f7b5f35011574 (diff)
IMplementation for option to not create a FIB table entry when adding a neighbor entry
Change-Id: I952039e101031ee6a06e63f4c73d8eb359423e1a Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'src/vnet/ethernet/arp.c')
-rw-r--r--src/vnet/ethernet/arp.c61
1 files changed, 36 insertions, 25 deletions
diff --git a/src/vnet/ethernet/arp.c b/src/vnet/ethernet/arp.c
index 222415b0aa3..d8ae84433e7 100644
--- a/src/vnet/ethernet/arp.c
+++ b/src/vnet/ethernet/arp.c
@@ -100,6 +100,7 @@ typedef struct
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)
@@ -254,6 +255,9 @@ format_ethernet_arp_ip4_entry (u8 * s, va_list * va)
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,
@@ -525,6 +529,7 @@ vnet_arp_set_ip4_over_ethernet_internal (vnet_main_t * vnm,
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);
@@ -546,16 +551,6 @@ vnet_arp_set_ip4_over_ethernet_internal (vnet_main_t * vnm,
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)
@@ -570,17 +565,25 @@ vnet_arp_set_ip4_over_ethernet_internal (vnet_main_t * vnm,
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
{
@@ -1142,7 +1145,7 @@ arp_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
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;
}
@@ -1658,6 +1661,8 @@ arp_entry_free (ethernet_arp_interface_t * eai, ethernet_arp_ip4_entry_t * e)
{
ethernet_arp_main_t *am = &ethernet_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);
@@ -1828,13 +1833,15 @@ increment_ip4_and_mac_address (ethernet_arp_ip4_over_ethernet_address_t * a)
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));
@@ -1931,6 +1938,7 @@ ip_arp_add_del_command_fn (vlib_main_t * vm,
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)
@@ -1948,6 +1956,9 @@ ip_arp_add_del_command_fn (vlib_main_t * vm,
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))
;
@@ -1991,7 +2002,7 @@ ip_arp_add_del_command_fn (vlib_main_t * vm,
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);
@@ -2046,7 +2057,7 @@ ip_arp_add_del_command_fn (vlib_main_t * vm,
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* */