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authorVladislav Grishenko <themiron@yandex-team.ru>2021-11-19 22:53:41 +0500
committerNeale Ranns <neale@graphiant.com>2022-03-25 07:57:58 +0000
commitb9feb61e8f6778bfc100b4bbcb9eee8795e20191 (patch)
tree129d11e45e2812757bd85d0d73bcd483ec944b79 /src/vnet/ip
parent89d74bdee88a10f04831246217448abae81f6142 (diff)
fib: fix ip6-ll fib selection for non-ethernet interfaces
Fixes case when packet to link-local address is received over gre/mpls or other non-ethernet interface and ip6-ll fib for it is undefined. If by a chance ip6-ll fib index is valid, packet will be passed to some ip6 fib with possibilities to be sent out over unrelated interface or be looped again into ip6-link-local dpo till oom and crash. Type: fix Signed-off-by: Vladislav Grishenko <themiron@yandex-team.ru> Change-Id: Ie985f0373ea45e2926db7fb0a1ff951eca0e38f6
Diffstat (limited to 'src/vnet/ip')
-rw-r--r--src/vnet/ip/ip6_ll_table.c24
1 files changed, 17 insertions, 7 deletions
diff --git a/src/vnet/ip/ip6_ll_table.c b/src/vnet/ip/ip6_ll_table.c
index e4010bc43c4..b3f42daf26c 100644
--- a/src/vnet/ip/ip6_ll_table.c
+++ b/src/vnet/ip/ip6_ll_table.c
@@ -114,9 +114,9 @@ ip6_ll_table_entry_update (const ip6_ll_prefix_t * ilp,
};
fib_prefix_t fp;
- vec_validate (ip6_ll_table.ilt_fibs, ilp->ilp_sw_if_index);
+ vec_validate_init_empty (ip6_ll_table.ilt_fibs, ilp->ilp_sw_if_index, ~0);
- if (0 == ip6_ll_fib_get (ilp->ilp_sw_if_index))
+ if (~0 == ip6_ll_fib_get (ilp->ilp_sw_if_index))
{
ip6_ll_fib_create (ilp->ilp_sw_if_index);
}
@@ -151,11 +151,12 @@ ip6_ll_table_entry_delete (const ip6_ll_prefix_t * ilp)
* if there are no ND sourced prefixes left, then we can clean up this FIB
*/
fib_index = ip6_ll_fib_get (ilp->ilp_sw_if_index);
- if (0 == fib_table_get_num_entries (fib_index,
- FIB_PROTOCOL_IP6, FIB_SOURCE_IP6_ND))
+ if (~0 != fib_index &&
+ 0 == fib_table_get_num_entries (fib_index, FIB_PROTOCOL_IP6,
+ FIB_SOURCE_IP6_ND))
{
fib_table_unlock (fib_index, FIB_PROTOCOL_IP6, FIB_SOURCE_IP6_ND);
- ip6_ll_table.ilt_fibs[ilp->ilp_sw_if_index] = 0;
+ ip6_ll_table.ilt_fibs[ilp->ilp_sw_if_index] = ~0;
}
}
@@ -273,8 +274,7 @@ ip6_ll_show_fib (vlib_main_t * vm,
u8 *s = NULL;
fib_index = ip6_ll_table.ilt_fibs[sw_if_index];
-
- if (0 == fib_index)
+ if (~0 == fib_index)
continue;
fib_table = fib_table_get (fib_index, FIB_PROTOCOL_IP6);
@@ -354,6 +354,16 @@ VLIB_CLI_COMMAND (ip6_show_fib_command, static) = {
/* *INDENT-ON* */
static clib_error_t *
+ip6_ll_sw_interface_add_del (vnet_main_t *vnm, u32 sw_if_index, u32 is_add)
+{
+ vec_validate_init_empty (ip6_ll_table.ilt_fibs, sw_if_index, ~0);
+
+ return (NULL);
+}
+
+VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_ll_sw_interface_add_del);
+
+static clib_error_t *
ip6_ll_module_init (vlib_main_t * vm)
{
clib_error_t *error;