ikev2: make liveness params configurable

[vpp.git] / src / plugins / ikev2 / ikev2.c

diff --git a/src/plugins/ikev2/ikev2.c b/src/plugins/ikev2/ikev2.c
index 92a8ff8..45da023 100644 (file)
--- a/src/plugins/ikev2/ikev2.c
+++ b/src/plugins/ikev2/ikev2.c
@@ -29,7 +29,7 @@
 #include <plugins/ikev2/ikev2_priv.h>
 #include <openssl/sha.h>
 
-#define IKEV2_LIVENESS_RETRIES 2
+#define IKEV2_LIVENESS_RETRIES 3
 #define IKEV2_LIVENESS_PERIOD_CHECK 30
 
 ikev2_main_t ikev2_main;
@@ -380,6 +380,7 @@ ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
   ikev2_sa_transform_t *t = 0, *t2;
   ikev2_main_t *km = &ikev2_main;
 
+  sai->init_response_received = 1;
 
   /*move some data to the new SA */
 #define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
@@ -2308,7 +2309,7 @@ ikev2_init_sa (ikev2_sa_t * sa)
 {
   ikev2_main_t *km = &ikev2_main;
   sa->liveness_period_check =
-    vlib_time_now (km->vlib_main) + IKEV2_LIVENESS_PERIOD_CHECK;
+    vlib_time_now (km->vlib_main) + km->liveness_period;
 }
 
 static uword
@@ -2445,10 +2446,18 @@ ikev2_node_fn (vlib_main_t * vm,
                          ikev2_sa_t *sai =
                            pool_elt_at_index (km->sais, p[0]);
 
-                         ikev2_complete_sa_data (sa0, sai);
-                         ikev2_calc_keys (sa0);
-                         ikev2_sa_auth_init (sa0);
-                         len = ikev2_generate_message (sa0, ike0, 0);
+                         if (sai->init_response_received)
+                           {
+                             /* we've already processed sa-init response */
+                             sa0->state = IKEV2_STATE_UNKNOWN;
+                           }
+                         else
+                           {
+                             ikev2_complete_sa_data (sa0, sai);
+                             ikev2_calc_keys (sa0);
+                             ikev2_sa_auth_init (sa0);
+                             len = ikev2_generate_message (sa0, ike0, 0);
+                           }
                        }
                    }
 
@@ -2586,7 +2595,11 @@ ikev2_node_fn (vlib_main_t * vm,
                            }
                        }
                    }
-                 len = ikev2_generate_message (sa0, ike0, 0);
+                 if (!(ike0->flags & IKEV2_HDR_FLAG_RESPONSE))
+                   {
+                     ike0->flags |= IKEV2_HDR_FLAG_RESPONSE;
+                     len = ikev2_generate_message (sa0, ike0, 0);
+                   }
                }
            }
          else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
@@ -3361,7 +3374,7 @@ ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
     ikev2_sa_free_proposal_vector (&proposals);
 
     sa.is_initiator = 1;
-    sa.profile_index = km->profiles - p;
+    sa.profile_index = p - km->profiles;
     sa.is_profile_index_set = 1;
     sa.state = IKEV2_STATE_SA_INIT;
     sa.tun_itf = p->tun_itf;
@@ -3697,6 +3710,8 @@ ikev2_init (vlib_main_t * vm)
   km->vnet_main = vnet_get_main ();
   km->vlib_main = vm;
 
+  km->liveness_period = IKEV2_LIVENESS_PERIOD_CHECK;
+  km->liveness_max_retries = IKEV2_LIVENESS_RETRIES;
   ikev2_crypto_init (km);
 
   mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
@@ -3834,6 +3849,19 @@ ikev2_set_log_level (ikev2_log_level_t log_level)
   return 0;
 }
 
+clib_error_t *
+ikev2_set_liveness_params (u32 period, u32 max_retries)
+{
+  ikev2_main_t *km = &ikev2_main;
+
+  if (period == 0 || max_retries == 0)
+    return clib_error_return (0, "invalid args");
+
+  km->liveness_period = period;
+  km->liveness_max_retries = max_retries;
+  return 0;
+}
+
 static void
 ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
 {
@@ -3889,6 +3917,9 @@ ikev2_process_pending_sa_init (ikev2_main_t * km)
   hash_foreach (ispi, sai, km->sa_by_ispi,
   ({
     sa = pool_elt_at_index (km->sais, sai);
+    if (sa->init_response_received)
+      continue;
+
     u32 bi0;
     if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
       return;
@@ -3944,7 +3975,10 @@ ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
   ikev2_main_t *km = &ikev2_main;
   vlib_main_t *vm = km->vlib_main;
 
-  if (sa->liveness_retries > IKEV2_LIVENESS_RETRIES)
+  if (!sa->sk_ai || !sa->sk_ar)
+    return 0;
+
+  if (sa->liveness_retries >= km->liveness_max_retries)
     return 1;
 
   f64 now = vlib_time_now (vm);
@@ -3952,7 +3986,7 @@ ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
   if (sa->liveness_period_check < now)
     {
       sa->liveness_retries++;
-      sa->liveness_period_check = now + IKEV2_LIVENESS_PERIOD_CHECK;
+      sa->liveness_period_check = now + km->liveness_period;
       ikev2_send_informational_request (sa);
     }
   return 0;