relay: Disable relay config when the module is disabled

This commit:
* disables the ORPort, DirPort, DirCache, and BridgeRelay options,
* sets ClientOnly 1,
* disables relay_config.c and relay/transport_config.c,
* disables test_rebind.sh, and
* modifies the expected results for test_parseconf.sh,
when the relay module is disabled.

Part of 32213.

src/core/include.am

@@ -143,13 +143,11 @@ LIBTOR_APP_A_SOURCES = 				\
 	src/feature/relay/dns.c			\
 	src/feature/relay/ext_orport.c		\
 	src/feature/relay/onion_queue.c		\
-	src/feature/relay/relay_config.c	\
 	src/feature/relay/relay_periodic.c	\
 	src/feature/relay/relay_sys.c		\
 	src/feature/relay/router.c		\
 	src/feature/relay/routerkeys.c		\
 	src/feature/relay/selftest.c		\
-	src/feature/relay/transport_config.c		\
 	src/feature/rend/rendcache.c		\
 	src/feature/rend/rendclient.c		\
 	src/feature/rend/rendcommon.c		\
@@ -173,11 +171,13 @@ endif
 LIBTOR_APP_TESTING_A_SOURCES = $(LIBTOR_APP_A_SOURCES)
 
 # The Relay module.
-MODULE_RELAY_SOURCES = 					    \
-	src/feature/relay/routermode.c
+MODULE_RELAY_SOURCES = 						\
+	src/feature/relay/routermode.c				\
+	src/feature/relay/relay_config.c			\
+	src/feature/relay/transport_config.c
 
 # The Directory Authority module.
-MODULE_DIRAUTH_SOURCES = 					\
+MODULE_DIRAUTH_SOURCES =					\
 	src/feature/dirauth/authmode.c				\
 	src/feature/dirauth/bridgeauth.c			\
 	src/feature/dirauth/bwauth.c				\

src/feature/relay/relay_config.h

@@ -12,12 +12,19 @@
 #ifndef TOR_FEATURE_RELAY_RELAY_CONFIG_H
 #define TOR_FEATURE_RELAY_RELAY_CONFIG_H
 
+typedef struct or_options_t or_options_t;
+
+#ifdef HAVE_MODULE_RELAY
+
 #include "lib/cc/torint.h"
 #include "lib/testsupport/testsupport.h"
 
-typedef struct or_options_t or_options_t;
 typedef struct smartlist_t smartlist_t;
 
+int options_validate_relay_mode(const or_options_t *old_options,
+                                or_options_t *options,
+                                char **msg);
+
 MOCK_DECL(const char*, get_dirportfrontpage, (void));
 void relay_config_free_all(void);
 
@@ -58,10 +65,6 @@ int options_validate_relay_accounting(const or_options_t *old_options,
                                       or_options_t *options,
                                       char **msg);
 
-int options_validate_relay_mode(const or_options_t *old_options,
-                                or_options_t *options,
-                                char **msg);
-
 int options_validate_relay_testing(const or_options_t *old_options,
                                    or_options_t *options,
                                    char **msg);
@@ -70,6 +73,7 @@ int options_act_relay(const or_options_t *old_options);
 int options_act_relay_accounting(const or_options_t *old_options);
 int options_act_relay_bandwidth(const or_options_t *old_options);
 int options_act_bridge_stats(const or_options_t *old_options);
+
 int options_act_relay_stats(const or_options_t *old_options,
                             bool *print_notice_out);
 void options_act_relay_stats_msg(void);
@@ -86,4 +90,99 @@ STATIC int have_enough_mem_for_dircache(const or_options_t *options,
 
 #endif
 
+#else
+
+#include "lib/cc/compat_compiler.h"
+
+/** When tor is compiled with the relay module disabled, it can't be
+ * configured as a relay or bridge.
+ *
+ * Always sets ClientOnly to 1.
+ *
+ * Returns -1 and sets msg to a newly allocated string, if ORPort, DirPort,
+ * DirCache, or BridgeRelay are set in options. Otherwise returns 0. */
+static inline int
+options_validate_relay_mode(const or_options_t *old_options,
+                            or_options_t *options,
+                            char **msg)
+{
+  (void)old_options;
+
+  /* Only check the primary options for now, #29211 will disable more
+   * options. These ORPort and DirPort checks are too strict, and will
+   * reject valid configs that disable ports, like "ORPort 0". */
+  if (options->DirCache ||
+      options->BridgeRelay ||
+      options->ORPort_lines ||
+      options->DirPort_lines) {
+    /* REJECT() this configuration */
+    *msg = tor_strdup("This tor was built with relay mode disabled. "
+                      "It can not be configured with an ORPort, a DirPort, "
+                      "DirCache 1, or BridgeRelay 1.");
+    return -1;
+  }
+
+  /* 31851 / 29211: Set this option the correct way */
+  options->ClientOnly = 1;
+
+  return 0;
+}
+
+#define get_dirportfrontpage() \
+  (NULL)
+#define relay_config_free_all() \
+  STMT_BEGIN STMT_END
+
+#define get_effective_bwrate(options) \
+  (((void)(options)),0)
+#define get_effective_bwburst(options) \
+  (((void)(options)),0)
+
+#define warn_nonlocal_ext_orports(ports, portname) \
+  (((void)(ports)),((void)(portname)))
+
+#define parse_ports_relay(options, msg, ports_out, have_low_ports_out) \
+  (((void)(options)),((void)(msg)),((void)(ports_out)), \
+   ((void)(have_low_ports_out)),0)
+#define update_port_set_relay(options, ports) \
+  (((void)(options)),((void)(ports)))
+
+#define options_validate_relay_os(old_options, options, msg) \
+  (((void)(old_options)),((void)(options)),((void)(msg)),0)
+#define options_validate_relay_info(old_options, options, msg) \
+  (((void)(old_options)),((void)(options)),((void)(msg)),0)
+#define options_validate_publish_server(old_options, options, msg) \
+  (((void)(old_options)),((void)(options)),((void)(msg)),0)
+#define options_validate_relay_padding(old_options, options, msg) \
+  (((void)(old_options)),((void)(options)),((void)(msg)),0)
+#define options_validate_relay_bandwidth(old_options, options, msg) \
+  (((void)(old_options)),((void)(options)),((void)(msg)),0)
+#define options_validate_relay_accounting(old_options, options, msg) \
+  (((void)(old_options)),((void)(options)),((void)(msg)),0)
+#define options_validate_relay_testing(old_options, options, msg) \
+  (((void)(old_options)),((void)(options)),((void)(msg)),0)
+
+#define options_act_relay(old_options) \
+  (((void)(old_options)),0)
+#define options_act_relay_accounting(old_options) \
+  (((void)(old_options)),0)
+#define options_act_relay_bandwidth(old_options) \
+  (((void)(old_options)),0)
+#define options_act_bridge_stats(old_options) \
+  (((void)(old_options)),0)
+
+#define options_act_relay_stats(old_options, print_notice_out) \
+  (((void)(old_options)),((void)(print_notice_out)),0)
+#define options_act_relay_stats_msg() \
+  STMT_BEGIN STMT_END
+
+#define options_act_relay_desc(old_options) \
+  (((void)(old_options)),0)
+#define options_act_relay_dos(old_options) \
+  (((void)(old_options)),0)
+#define options_act_relay_dir(old_options) \
+  (((void)(old_options)),0)
+
+#endif
+
 #endif /* !defined(TOR_FEATURE_RELAY_RELAY_CONFIG_H) */

src/feature/relay/transport_config.h

@@ -12,6 +12,8 @@
 #ifndef TOR_FEATURE_RELAY_TRANSPORT_CONFIG_H
 #define TOR_FEATURE_RELAY_TRANSPORT_CONFIG_H
 
+#ifdef HAVE_MODULE_RELAY
+
 #include "lib/testsupport/testsupport.h"
 
 typedef struct or_options_t or_options_t;
@@ -34,4 +36,20 @@ STATIC smartlist_t *get_options_from_transport_options_line(
 
 #endif
 
+#else
+
+#define get_transport_bindaddr_from_config(transport) \
+  (((void)(transport)),NULL)
+
+/* 31851: called from client/transports.c, but only from server code */
+#define get_options_for_server_transport(transport) \
+  (((void)(transport)),NULL)
+
+#define options_validate_server_transport(old_options, options, msg) \
+  (((void)(old_options)),((void)(options)),((void)(msg)),0)
+#define options_act_server_transport(old_options) \
+  (((void)(old_options)),0)
+
+#endif
+
 #endif /* !defined(TOR_FEATURE_RELAY_TRANSPORT_CONFIG_H) */

src/test/conf_examples/badnick_1/error_no_dirauth_relay

+This tor was built with relay mode disabled.

src/test/conf_examples/badnick_2/error_no_dirauth_relay

+This tor was built with relay mode disabled.

src/test/conf_examples/contactinfo_notutf8/error_no_dirauth_relay

+This tor was built with relay mode disabled.

src/test/conf_examples/example_1/error_no_dirauth_relay

+This tor was built with relay mode disabled.

src/test/conf_examples/example_3/error_no_dirauth_relay

+This tor was built with relay mode disabled.

src/test/conf_examples/include_1/error_no_dirauth_relay

+This tor was built with relay mode disabled.

src/test/conf_examples/include_bug_31408/error_no_dirauth_relay

+This tor was built with relay mode disabled.

src/test/conf_examples/large_1/error_no_dirauth_relay

+This tor was built with relay mode disabled.

src/test/conf_examples/ops_1/error_no_dirauth_relay

+This tor was built with relay mode disabled.

src/test/conf_examples/ops_1/expected_no_dirauth_relay

-ORPort 1000

src/test/conf_examples/ops_3/error_no_dirauth_relay

+This tor was built with relay mode disabled.

src/test/conf_examples/ops_3/expected_no_dirauth_relay

-ORPort 9999
-ORPort 1000

src/test/conf_examples/ops_4/error_no_dirauth_relay

+This tor was built with relay mode disabled.

src/test/conf_examples/ops_4/expected_no_dirauth_relay

-ORPort 9099

src/test/conf_examples/ops_5/error_no_dirauth_relay

+This tor was built with relay mode disabled.

src/test/conf_examples/ops_5/expected_no_dirauth_relay

-ORPort 9000
-ORPort 9099

src/test/test_rebind.sh

@@ -12,6 +12,11 @@ if test "$UNAME_OS" = 'CYGWIN' || \
   fi
 fi
 
+if "${TESTING_TOR_BINARY}" --list-modules | grep -q "relay: no"; then
+  echo "This test requires the relay module. Skipping." >&2
+  exit 77
+fi
+
 tmpdir=
 clean () {
   if [ -n "$tmpdir" ] && [ -d "$tmpdir" ]; then