vici: Expose ike-update event

src/libcharon/plugins/vici/README.md

@@ -976,6 +976,22 @@ The _ike-rekey_ event is issued when an IKE_SA is rekeyed.
 		}
 	}
 
+### ike-update ###
+
+The _ike-update_ event is issued when the local or remote endpoint address of an
+IKE_SA is about to change (at least one address/port is different).
+
+	{
+		local-host = <new/current local IKE endpoint address>
+		local-port = <new/current local IKE endpoint port>
+		remote-host = <new/current remote IKE endpoint address>
+		remote-port = <new/current remote IKE endpoint port>
+		<IKE_SA config name> = {
+			<same data as in the list-sas event, but without child-sas section
+			 and listing the old addresses/ports>
+		}
+	}
+
 ### child-updown ###
 
 The _child-updown_ event is issued when a CHILD_SA is established or terminated.

src/libcharon/plugins/vici/vici_query.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2015-2017 Tobias Brunner
+ * Copyright (C) 2015-2020 Tobias Brunner
  * Copyright (C) 2015-2018 Andreas Steffen
  * HSR Hochschule fuer Technik Rapperswil
  *
@@ -510,6 +510,7 @@ CALLBACK(list_sas, vici_message_t*,
 	bool bl;
 	char buf[BUF_LEN];
 
+
 	bl = request->get_str(request, NULL, "noblock") == NULL;
 	ike = request->get_str(request, NULL, "ike");
 	ike_id = request->get_int(request, 0, "ike-id");
@@ -1683,6 +1684,7 @@ static void manage_commands(private_vici_query_t *this, bool reg)
 	this->dispatcher->manage_event(this->dispatcher, "list-cert", reg);
 	this->dispatcher->manage_event(this->dispatcher, "ike-updown", reg);
 	this->dispatcher->manage_event(this->dispatcher, "ike-rekey", reg);
+	this->dispatcher->manage_event(this->dispatcher, "ike-update", reg);
 	this->dispatcher->manage_event(this->dispatcher, "child-updown", reg);
 	this->dispatcher->manage_event(this->dispatcher, "child-rekey", reg);
 	manage_command(this, "list-sas", list_sas, reg);
@@ -1755,6 +1757,36 @@ METHOD(listener_t, ike_rekey, bool,
 	return TRUE;
 }
 
+METHOD(listener_t, ike_update, bool,
+	private_vici_query_t *this, ike_sa_t *ike_sa, host_t *local, host_t *remote)
+{
+	vici_builder_t *b;
+	time_t now;
+
+	if (!this->dispatcher->has_event_listeners(this->dispatcher, "ike-update"))
+	{
+		return TRUE;
+	}
+
+	now = time_monotonic(NULL);
+
+	b = vici_builder_create();
+
+	b->add_kv(b, "local-host", "%H", local);
+	b->add_kv(b, "local-port", "%d", local->get_port(local));
+	b->add_kv(b, "remote-host", "%H", remote);
+	b->add_kv(b, "remote-port", "%d", remote->get_port(remote));
+
+	b->begin_section(b, ike_sa->get_name(ike_sa));
+	list_ike(this, b, ike_sa, now);
+	b->end_section(b);
+
+	this->dispatcher->raise_event(this->dispatcher,
+								  "ike-update", 0, b->finalize(b));
+
+	return TRUE;
+}
+
 METHOD(listener_t, child_updown, bool,
 	private_vici_query_t *this, ike_sa_t *ike_sa, child_sa_t *child_sa, bool up)
 {
@@ -1853,6 +1885,7 @@ vici_query_t *vici_query_create(vici_dispatcher_t *dispatcher)
 			.listener = {
 				.ike_updown = _ike_updown,
 				.ike_rekey = _ike_rekey,
+				.ike_update = _ike_update,
 				.child_updown = _child_updown,
 				.child_rekey = _child_rekey,
 			},