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-rw-r--r--src/plugins/nat/nat_det.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/src/plugins/nat/nat_det.c b/src/plugins/nat/nat_det.c
index 0ab96dc1026..cad0d2ae5af 100644
--- a/src/plugins/nat/nat_det.c
+++ b/src/plugins/nat/nat_det.c
@@ -71,6 +71,17 @@ snat_det_add_map (snat_main_t * sm, ip4_address_t * in_addr, u8 in_plen,
if (is_add)
{
+ u32 num_sessions = (1 << (32 - in_plen));
+ if (num_sessions > UINT32_MAX / 1000)
+ {
+ // don't let it overflow
+ return VNET_API_ERROR_INVALID_VALUE;
+ }
+ else
+ {
+ num_sessions = num_sessions * 1000 - 1;
+ }
+
pool_get (sm->det_maps, det_map);
clib_memset (det_map, 0, sizeof (*det_map));
det_map->in_addr.as_u32 = in_cmp.as_u32;
@@ -80,9 +91,8 @@ snat_det_add_map (snat_main_t * sm, ip4_address_t * in_addr, u8 in_plen,
det_map->sharing_ratio = (1 << (32 - in_plen)) / (1 << (32 - out_plen));
det_map->ports_per_host = (65535 - 1023) / det_map->sharing_ratio;
- vec_validate_init_empty (det_map->sessions,
- SNAT_DET_SES_PER_USER * (1 << (32 - in_plen)) -
- 1, empty_snat_det_session);
+ vec_validate_init_empty (det_map->sessions, num_sessions,
+ empty_snat_det_session);
}
else
{