config: Move relay port parsing into the relay module

This commit:
* creates feature/relay/relay_config.[ch],
* moves relay port parsing into them,
* exposes some code from src/app/config.c
  (we'll refactor it later in 29211), and
* adds thin wrappers to make the moved code compile.

No functional changes: the moved code is still enabled,
even if the relay module is disabled.

Part of 32213.

1 files changed, 25 insertions, 0 deletions

diff --git a/src/feature/relay/relay_config.h b/src/feature/relay/relay_config.h
new file mode 100644
index 0000000000..1b46e825ad
--- /dev/null
+++ b/src/feature/relay/relay_config.h
@@ -0,0 +1,25 @@
+/* Copyright (c) 2001 Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2019, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * @file relay_config.h
+ * @brief Header for feature/relay/relay_config.c
+ **/
+
+#ifndef TOR_FEATURE_RELAY_RELAY_CONFIG_H
+#define TOR_FEATURE_RELAY_RELAY_CONFIG_H
+
+typedef struct or_options_t or_options_t;
+typedef struct smartlist_t smartlist_t;
+
+int parse_ports_relay(or_options_t *options,
+                      char **msg,
+                      smartlist_t *ports_out,
+                      int *have_low_ports_out);
+void update_port_set_relay(or_options_t *options,
+                           const smartlist_t *ports);
+
+#endif /* !defined(TOR_FEATURE_RELAY_RELAY_CONFIG_H) */