ikev2: add retry logic for session initiation

Type: improvement

Change-Id: Ib474dabb745bc2034d8d60261c095e35a8fff277
Signed-off-by: Filip Tehlar <ftehlar@cisco.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/src/plugins/ikev2/ikev2.c b/src/plugins/ikev2/ikev2.c
index dfa697fc714..55c9aa36255 100644
--- a/src/plugins/ikev2/ikev2.c
+++ b/src/plugins/ikev2/ikev2.c
@@ -3742,6 +3742,31 @@ ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
     }
 }
 
+static void
+ikev2_process_pending_sa_init (ikev2_main_t * km)
+{
+  u32 sai;
+  u64 ispi;
+  ikev2_sa_t *sa;
+
+  /* *INDENT-OFF* */
+  hash_foreach (ispi, sai, km->sa_by_ispi,
+  ({
+    sa = pool_elt_at_index (km->sais, sai);
+    u32 bi0;
+    if (vlib_buffer_alloc (km->vlib_main, &bi0, 1) != 1)
+      return;
+
+    vlib_buffer_t * b = vlib_get_buffer (km->vlib_main, bi0);
+    clib_memcpy_fast (vlib_buffer_get_current (b),
+        sa->last_sa_init_req_packet_data,
+        vec_len (sa->last_sa_init_req_packet_data));
+    ikev2_send_ike (km->vlib_main, &sa->iaddr, &sa->raddr, bi0,
+        vec_len (sa->last_sa_init_req_packet_data));
+  }));
+  /* *INDENT-ON* */
+}
+
 static vlib_node_registration_t ikev2_mngr_process_node;
 
 static uword
@@ -3790,6 +3815,8 @@ ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
       }));
       /* *INDENT-ON* */
 
+      ikev2_process_pending_sa_init (km);
+
       if (req_sent)
 	{
 	  vlib_process_wait_for_event_or_clock (vm, 5);