IP6 link-local table
- IPv6 link local table is a per-SW interface array of IPv6 unicast FIBs
- the per-interface ocst is sizeof(fib_table_t) which is small,
w.r.t. the cost of an interface
- FE80::/10 in the 'global' table points to a DPO that performs a lookup in the
input interface's LL fib.
Change-Id: Ice834b25ebeeacb2e929d7c864d7ec8c09918cbe
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
diff --git a/src/vnet/ip/ip6_neighbor.c b/src/vnet/ip/ip6_neighbor.c
index 22f640c..d637966 100644
--- a/src/vnet/ip/ip6_neighbor.c
+++ b/src/vnet/ip/ip6_neighbor.c
@@ -25,6 +25,7 @@
#include <vnet/fib/fib_table.h>
#include <vnet/fib/ip6_fib.h>
#include <vnet/mfib/ip6_mfib.h>
+#include <vnet/ip/ip6_ll_table.h>
/**
* @file
@@ -273,7 +274,7 @@
u8 *flags = 0;
if (!n)
- return format (s, "%=12s%=20s%=6s%=20s%=40s", "Time", "Address", "Flags",
+ return format (s, "%=12s%=25s%=6s%=20s%=40s", "Time", "Address", "Flags",
"Link layer", "Interface");
if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
@@ -286,7 +287,7 @@
flags = format (flags, "N");
si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
- s = format (s, "%=12U%=20U%=6s%=20U%=40U",
+ s = format (s, "%=12U%=25U%=6s%=20U%=40U",
format_vlib_cpu_time, vm, n->cpu_time_last_updated,
format_ip6_address, &n->key.ip6_address,
flags ? (char *) flags : "",
@@ -302,18 +303,29 @@
{
if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
{
- fib_prefix_t pfx = {
- .fp_len = 128,
- .fp_proto = FIB_PROTOCOL_IP6,
- .fp_addr.ip6 = n->key.ip6_address,
- };
- fib_table_entry_path_remove (fib_index,
- &pfx,
- FIB_SOURCE_ADJ,
- DPO_PROTO_IP6,
- &pfx.fp_addr,
- n->key.sw_if_index, ~0,
- 1, FIB_ROUTE_PATH_FLAG_NONE);
+ if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
+ {
+ ip6_ll_prefix_t pfx = {
+ .ilp_addr = n->key.ip6_address,
+ .ilp_sw_if_index = n->key.sw_if_index,
+ };
+ ip6_ll_table_entry_delete (&pfx);
+ }
+ else
+ {
+ fib_prefix_t pfx = {
+ .fp_len = 128,
+ .fp_proto = FIB_PROTOCOL_IP6,
+ .fp_addr.ip6 = n->key.ip6_address,
+ };
+ fib_table_entry_path_remove (fib_index,
+ &pfx,
+ FIB_SOURCE_ADJ,
+ DPO_PROTO_IP6,
+ &pfx.fp_addr,
+ n->key.sw_if_index, ~0,
+ 1, FIB_ROUTE_PATH_FLAG_NONE);
+ }
}
}
@@ -640,18 +652,30 @@
static void
ip6_neighbor_adj_fib_add (ip6_neighbor_t * n, u32 fib_index)
{
- fib_prefix_t pfx = {
- .fp_len = 128,
- .fp_proto = FIB_PROTOCOL_IP6,
- .fp_addr.ip6 = n->key.ip6_address,
- };
+ if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
+ {
+ ip6_ll_prefix_t pfx = {
+ .ilp_addr = n->key.ip6_address,
+ .ilp_sw_if_index = n->key.sw_if_index,
+ };
+ n->fib_entry_index =
+ ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_FLAG_NONE);
+ }
+ else
+ {
+ fib_prefix_t pfx = {
+ .fp_len = 128,
+ .fp_proto = FIB_PROTOCOL_IP6,
+ .fp_addr.ip6 = n->key.ip6_address,
+ };
- n->fib_entry_index =
- fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
- FIB_ENTRY_FLAG_ATTACHED,
- DPO_PROTO_IP6, &pfx.fp_addr,
- n->key.sw_if_index, ~0, 1, NULL,
- FIB_ROUTE_PATH_FLAG_NONE);
+ n->fib_entry_index =
+ fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
+ FIB_ENTRY_FLAG_ATTACHED,
+ DPO_PROTO_IP6, &pfx.fp_addr,
+ n->key.sw_if_index, ~0, 1, NULL,
+ FIB_ROUTE_PATH_FLAG_NONE);
+ }
}
int
@@ -708,9 +732,8 @@
*/
if (!is_no_fib_entry)
{
- ip6_neighbor_adj_fib_add (n,
- ip6_fib_table_get_index_for_sw_if_index
- (n->key.sw_if_index));
+ ip6_neighbor_adj_fib_add
+ (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
}
else
{
@@ -1135,7 +1158,7 @@
&h0->target_address,
o0->ethernet_address,
sizeof (o0->ethernet_address),
- 0, ip6_sadd_link_local);
+ 0, 0);
}
if (is_solicitation && error0 == ICMP6_ERROR_NONE)
@@ -1153,9 +1176,18 @@
}
else
{
- fei = ip6_fib_table_lookup_exact_match (fib_index,
- &h0->target_address,
- 128);
+ if (ip6_address_is_link_local_unicast (&h0->target_address))
+ {
+ fei = ip6_fib_table_lookup_exact_match
+ (ip6_ll_fib_get (sw_if_index0),
+ &h0->target_address, 128);
+ }
+ else
+ {
+ fei = ip6_fib_table_lookup_exact_match (fib_index,
+ &h0->target_address,
+ 128);
+ }
if (FIB_NODE_INDEX_INVALID == fei)
{
@@ -1174,7 +1206,8 @@
}
else
if (fib_entry_is_sourced
- (fei, FIB_SOURCE_IP6_ND_PROXY))
+ (fei, FIB_SOURCE_IP6_ND_PROXY) ||
+ fib_entry_is_sourced (fei, FIB_SOURCE_IP6_ND))
{
/* The address was added by IPv6 Proxy ND config.
* We should only respond to these if the NS arrived on
@@ -3273,6 +3306,10 @@
vec_free (unknown_scope);
}
+ vlib_cli_output (vm, "\tLink-local address(es):\n");
+ vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
+ &radv_info->link_local_address);
+
vlib_cli_output (vm, "\tJoined group address(es):\n");
ip6_mldp_group_t *m;
/* *INDENT-OFF* */
@@ -3395,7 +3432,6 @@
/* if not created - do nothing */
if (ri != ~0)
{
- vnet_main_t *vnm = vnet_get_main ();
ip6_radv_t *radv_info;
radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
@@ -3405,14 +3441,15 @@
if (radv_info->ref_count == 0)
{
/* essentially "disables" ipv6 on this interface */
- error = ip6_add_del_interface_address (vm, sw_if_index,
- &radv_info->
- link_local_address, 128,
- 1 /* is_del */ );
-
- ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
- 0 /* is_add */ );
+ ip6_ll_prefix_t ilp = {
+ .ilp_addr = radv_info->link_local_address,
+ .ilp_sw_if_index = sw_if_index,
+ };
+ ip6_ll_table_entry_delete (&ilp);
+ ip6_sw_interface_enable_disable (sw_if_index, 0);
ip6_mfib_interface_enable_disable (sw_if_index, 0);
+ ip6_neighbor_sw_interface_add_del (vnet_get_main (), sw_if_index,
+ 0);
}
}
return error;
@@ -3499,20 +3536,20 @@
/* clear u bit */
link_local_address.as_u8[8] &= 0xfd;
}
+ {
+ ip6_ll_prefix_t ilp = {
+ .ilp_addr = link_local_address,
+ .ilp_sw_if_index = sw_if_index,
+ };
- ip6_mfib_interface_enable_disable (sw_if_index, 1);
+ ip6_ll_table_entry_update (&ilp, FIB_ROUTE_PATH_LOCAL);
+ }
/* essentially "enables" ipv6 on this interface */
- error = ip6_add_del_interface_address (vm, sw_if_index,
- &link_local_address,
- 128
- /* address width */ ,
- 0 /* is_del */ );
+ ip6_mfib_interface_enable_disable (sw_if_index, 1);
+ ip6_sw_interface_enable_disable (sw_if_index, 1);
- if (error)
- ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
- !is_add);
- else
+ if (!error)
{
radv_info->link_local_address = link_local_address;
}
@@ -3523,6 +3560,27 @@
return error;
}
+int
+ip6_get_ll_address (u32 sw_if_index, ip6_address_t * addr)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ ip6_radv_t *radv_info;
+ u32 ri;
+
+ if (vec_len (nm->if_radv_pool_index_by_sw_if_index) < sw_if_index)
+ return 0;
+
+ ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
+
+ if (ri == ~0)
+ return 0;
+
+ radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
+ *addr = radv_info->link_local_address;
+
+ return (!0);
+}
+
static clib_error_t *
enable_ip6_interface_cmd (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)