1 files changed, 59 insertions, 0 deletions
diff --git a/src/network/core/config.cpp b/src/network/core/config.cpp
new file mode 100644
index 000000000..c5fe3adbd
--- /dev/null
+++ b/src/network/core/config.cpp
@@ -0,0 +1,59 @@
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file config.cpp Configuration of the connection strings for network stuff using environment variables.
+ */
+
+#include "../../stdafx.h"
+
+#include <cstdlib>
+#include "../../string_func.h"
+
+#include "../../safeguards.h"
+
+/**
+ * Get the environment variable using std::getenv and when it is an empty string (or nullptr), return a fallback value instead.
+ * @param variable The environment variable to read from.
+ * @param fallback The fallback in case the environment variable is not set.
+ * @return The environment value, or when that does not exist the given fallback value.
+ */
+static const char *GetEnv(const char *variable, const char *fallback)
+{
+	const char *value = std::getenv(variable);
+	return StrEmpty(value) ? fallback : value;
+}
+
+/**
+ * Get the connection string for the game coordinator from the environment variable OTTD_COORDINATOR_CS,
+ * or when it has not been set a hard coded default DNS hostname of the production server.
+ * @return The game coordinator's connection string.
+ */
+const char *NetworkCoordinatorConnectionString()
+{
+	return GetEnv("OTTD_COORDINATOR_CS", "coordinator.openttd.org");
+}
+
+/**
+ * Get the connection string for the content server from the environment variable OTTD_CONTENT_SERVER_CS,
+ * or when it has not been set a hard coded default DNS hostname of the production server.
+ * @return The game coordinator's connection string.
+ */
+const char *NetworkContentServerConnectionString()
+{
+	return GetEnv("OTTD_CONTENT_SERVER_CS", "content.openttd.org");
+}
+
+/**
+ * Get the connection string for the content mirror from the environment variable OTTD_CONTENT_MIRROR_CS,
+ * or when it has not been set a hard coded default DNS hostname of the production server.
+ * @return The game coordinator's connection string.
+ */
+const char *NetworkContentMirrorConnectionString()
+{
+	return GetEnv("OTTD_CONTENT_MIRROR_CS", "binaries.openttd.org");
+}