3 files changed, 41 insertions, 4 deletions
diff --git a/common/CMakeLists.txt b/common/CMakeLists.txt
index 5c4c9e1..a126620 100644
--- a/common/CMakeLists.txt
+++ b/common/CMakeLists.txt
@@ -1,6 +1,7 @@
 project(common CXX)
-add_library(${PROJECT_NAME} INTERFACE
+add_library(${PROJECT_NAME} STATIC
+	src/internal.cpp
 	)
 target_include_directories(${PROJECT_NAME}
-	INTERFACE include
+	PUBLIC include
 	)
diff --git a/common/include/hwd/internal.h b/common/include/hwd/internal.h
index dab1e32..633c5a9 100644
--- a/common/include/hwd/internal.h
+++ b/common/include/hwd/internal.h
@@ -4,6 +4,15 @@ namespace hwd
 {
 namespace internal
 {
+
 constexpr int default_port = 4236;
-}
-}
+constexpr const char * default_host = "127.0.0.1";
+
+constexpr const char * port_variable = "HWDPORT";
+constexpr const char * host_variable = "HWDHOST";
+
+int port();
+const char * host();
+
+}  // namespace internal
+}  // namespace hwd
diff --git a/common/src/internal.cpp b/common/src/internal.cpp
new file mode 100644
index 0000000..de1e7b0
--- /dev/null
+++ b/common/src/internal.cpp
@@ -0,0 +1,27 @@
+#include "hwd/internal.h"
+
+#include <cstdlib>
+
+
+namespace hwd
+{
+namespace internal
+{
+
+int port()
+{
+	if (const char * from_env = std::getenv(port_variable))
+		if (int port_number = std::atoi(from_env))
+			return port_number;
+	return default_port;
+}
+
+const char * host()
+{
+	if (const char * from_env = std::getenv(host_variable))
+		return from_env;
+	return default_host;
+}
+
+}  // namespace internal
+}  // namespace hwd