From 56d712533bc4de75b184e523c89573a9616c7d67 Mon Sep 17 00:00:00 2001
From: Filip Tehlar <ftehlar@cisco.com>
Date: Fri, 30 Oct 2020 05:52:19 +0000
Subject: [PATCH] ikev2: cli for disabling dead peer detection

Type: feature

Change-Id: I0db0a9b2f872753fa64d27335838cb34645a9ee8
Signed-off-by: Filip Tehlar <ftehlar@cisco.com>
(cherry picked from commit af4a414eb74d1456121023e6b3aa76af6c16f89a)
---
 src/plugins/ikev2/ikev2.c      |  9 ++++++++-
 src/plugins/ikev2/ikev2_cli.c  | 19 ++++++++++++++++++-
 src/plugins/ikev2/ikev2_priv.h |  4 ++++
 3 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/src/plugins/ikev2/ikev2.c b/src/plugins/ikev2/ikev2.c
index 2281c91d44f..feaae1e492a 100644
--- a/src/plugins/ikev2/ikev2.c
+++ b/src/plugins/ikev2/ikev2.c
@@ -4873,6 +4873,13 @@ ikev2_send_informational_request (ikev2_sa_t * sa)
 		  sa->sw_if_index);
 }
 
+void
+ikev2_disable_dpd (void)
+{
+  ikev2_main_t *km = &ikev2_main;
+  km->dpd_disabled = 1;
+}
+
 static_always_inline int
 ikev2_mngr_process_responder_sas (ikev2_sa_t * sa)
 {
@@ -4940,7 +4947,7 @@ ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
             req_sent |= ikev2_mngr_process_child_sa(sa, c, del_old_ids);
             }
 
-          if (ikev2_mngr_process_responder_sas (sa))
+          if (!km->dpd_disabled && ikev2_mngr_process_responder_sas (sa))
             vec_add1 (to_be_deleted, sa - tkm->sas);
         }));
         /* *INDENT-ON* */
diff --git a/src/plugins/ikev2/ikev2_cli.c b/src/plugins/ikev2/ikev2_cli.c
index c948578eb23..676ca7b0c21 100644
--- a/src/plugins/ikev2/ikev2_cli.c
+++ b/src/plugins/ikev2/ikev2_cli.c
@@ -249,6 +249,23 @@ VLIB_CLI_COMMAND (show_ikev2_sa_command, static) = {
 };
 /* *INDENT-ON* */
 
+static clib_error_t *
+ikev2_disable_dpd_command_fn (vlib_main_t * vm,
+			      unformat_input_t * input,
+			      vlib_cli_command_t * cmd)
+{
+  ikev2_disable_dpd ();
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (ikev2_cli_disable_dpd_command, static) = {
+  .path = "ikev2 dpd disable",
+  .short_help = "ikev2 dpd disable",
+  .function = ikev2_disable_dpd_command_fn,
+};
+/* *INDENT-ON* */
+
 static uword
 unformat_ikev2_token (unformat_input_t * input, va_list * va)
 {
@@ -777,7 +794,7 @@ VLIB_CLI_COMMAND (ikev2_initiate_command, static) = {
         "ikev2 initiate sa-init <profile id>\n"
         "ikev2 initiate del-child-sa <child sa ispi>\n"
         "ikev2 initiate del-sa <sa ispi>\n"
-        "ikev2 initiate rekey-child-sa <profile id> <child sa ispi>\n",
+        "ikev2 initiate rekey-child-sa <child sa ispi>\n",
     .function = ikev2_initiate_command_fn,
 };
 /* *INDENT-ON* */
diff --git a/src/plugins/ikev2/ikev2_priv.h b/src/plugins/ikev2/ikev2_priv.h
index 2b89b66efa6..ae0c2a4bae3 100644
--- a/src/plugins/ikev2/ikev2_priv.h
+++ b/src/plugins/ikev2/ikev2_priv.h
@@ -496,6 +496,9 @@ typedef struct
 
   /* max number of retries before considering peer dead */
   u32 liveness_max_retries;
+
+  /* dead peer detection */
+  u8 dpd_disabled;
 } ikev2_main_t;
 
 extern ikev2_main_t ikev2_main;
@@ -571,6 +574,7 @@ ikev2_notify_t *ikev2_parse_notify_payload (ike_payload_header_t * ikep,
 					    u32 rlen);
 int ikev2_set_log_level (ikev2_log_level_t log_level);
 u8 *ikev2_find_ike_notify_payload (ike_header_t * ike, u32 msg_type);
+void ikev2_disable_dpd (void);
 
 static_always_inline ikev2_main_per_thread_data_t *
 ikev2_get_per_thread_data ()