Move the "is the network disabled?" functions out of router.c

Since this is completely core functionality, I'm putting it in
core/mainloop, even though it depends on feature/hibernate. We'll
have to sort that out in the future.

src/core/include.am

@@ -20,6 +20,7 @@ LIBTOR_APP_A_SOURCES = 				\
 	src/core/mainloop/connection.c		\
 	src/core/mainloop/cpuworker.c		\
 	src/core/mainloop/mainloop.c		\
+	src/core/mainloop/netstatus.c		\
 	src/core/mainloop/periodic.c		\
 	src/core/or/address_set.c		\
 	src/core/or/channel.c			\
@@ -187,6 +188,7 @@ noinst_HEADERS +=					\
 	src/core/mainloop/connection.h			\
 	src/core/mainloop/cpuworker.h			\
 	src/core/mainloop/mainloop.h			\
+	src/core/mainloop/netstatus.h			\
 	src/core/mainloop/periodic.h			\
 	src/core/or/addr_policy_st.h			\
 	src/core/or/address_set.h			\

src/core/mainloop/netstatus.c

@@ -0,0 +1,28 @@
+/* Copyright (c) 2001 Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#include "core/or/or.h"
+#include "core/mainloop/netstatus.h"
+#include "app/config/config.h"
+#include "feature/hibernate/hibernate.h"
+
+/** Return true iff our network is in some sense disabled or shutting down:
+ * either we're hibernating, entering hibernation, or the network is turned
+ * off with DisableNetwork. */
+int
+net_is_disabled(void)
+{
+  return get_options()->DisableNetwork || we_are_hibernating();
+}
+
+/** Return true iff our network is in some sense "completely disabled" either
+ * we're fully hibernating or the network is turned off with
+ * DisableNetwork. */
+int
+net_is_completely_disabled(void)
+{
+  return get_options()->DisableNetwork || we_are_fully_hibernating();
+}

src/core/mainloop/netstatus.h

@@ -0,0 +1,13 @@
+/* Copyright (c) 2001 Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#ifndef TOR_NETSTATUS_H
+#define TOR_NETSTATUS_H
+
+int net_is_disabled(void);
+int net_is_completely_disabled(void);
+
+#endif

src/feature/relay/router.c

@@ -1311,24 +1311,6 @@ router_should_advertise_begindir(const or_options_t *options,
                                       supports_tunnelled_dir_requests);
 }
 
-/** Return true iff our network is in some sense disabled or shutting down:
- * either we're hibernating, entering hibernation, or the network is turned
- * off with DisableNetwork. */
-int
-net_is_disabled(void)
-{
-  return get_options()->DisableNetwork || we_are_hibernating();
-}
-
-/** Return true iff our network is in some sense "completely disabled" either
- * we're fully hibernating or the network is turned off with
- * DisableNetwork. */
-int
-net_is_completely_disabled(void)
-{
-  return get_options()->DisableNetwork || we_are_fully_hibernating();
-}
-
 /** Return true iff the combination of options in <b>options</b> and parameters
  * in the consensus mean that we don't want to allow exits from circuits
  * we got from addresses not known to be servers. */

src/feature/relay/router.h

@@ -16,6 +16,7 @@
 #include "feature/nodelist/describe.h"
 #include "feature/nodelist/nickname.h"
 #include "feature/nodelist/routerinfo.h"
+#include "core/mainloop/netstatus.h"
 
 struct curve25519_keypair_t;
 struct ed25519_keypair_t;
@@ -59,9 +60,6 @@ int router_initialize_tls_context(void);
 int init_keys(void);
 int init_keys_client(void);
 
-int net_is_disabled(void);
-int net_is_completely_disabled(void);
-
 uint16_t router_get_active_listener_port_by_type_af(int listener_type,
                                                     sa_family_t family);
 uint16_t router_get_advertised_or_port(const or_options_t *options);