cmake: WireGuard module for Artemis — boringtun + platform dispatch

cmake/wg.cmake

@@ -0,0 +1,77 @@
+# cmake/wg.cmake — WireGuard client integration for Artemis (Sunshine fork).
+#
+# Include from the top-level CMakeLists.txt:
+#
+#   include(cmake/wg.cmake)
+#   artemis_wg_configure(sunshine)   # pass the name of your app target
+#
+# Prerequisites:
+#   Run scripts/build-boringtun.sh (Linux/macOS) or
+#       scripts/build-boringtun-win.ps1 (Windows)
+#   to produce deps/boringtun/libboringtun.a (or .lib on Windows).
+
+# ─── boringtun static library ─────────────────────────────────────────────────
+
+if(WIN32)
+    set(ARTEMIS_BORINGTUN_LIB "${CMAKE_SOURCE_DIR}/deps/boringtun/boringtun.lib")
+else()
+    set(ARTEMIS_BORINGTUN_LIB "${CMAKE_SOURCE_DIR}/deps/boringtun/libboringtun.a")
+endif()
+
+if(NOT EXISTS "${ARTEMIS_BORINGTUN_LIB}")
+    message(FATAL_ERROR
+        "boringtun library not found at ${ARTEMIS_BORINGTUN_LIB}\n"
+        "Run the appropriate build script in scripts/ and re-run CMake.")
+endif()
+
+add_library(artemis_boringtun STATIC IMPORTED GLOBAL)
+set_target_properties(artemis_boringtun PROPERTIES
+    IMPORTED_LOCATION "${ARTEMIS_BORINGTUN_LIB}"
+)
+
+# ─── WireGuard source files ───────────────────────────────────────────────────
+
+set(ARTEMIS_WG_SOURCES
+    src/wg/wgconfig.cpp
+    src/wg/relayreg.cpp
+)
+
+if(WIN32)
+    list(APPEND ARTEMIS_WG_SOURCES src/wg/wgclient_win.cpp)
+elseif(UNIX AND NOT APPLE)
+    list(APPEND ARTEMIS_WG_SOURCES src/wg/wgclient_linux.cpp)
+elseif(APPLE)
+    # macOS: future — use utun approach from DragonMoonlight if needed
+    message(WARNING "Artemis WireGuard client not yet implemented for macOS")
+endif()
+
+# ─── Configuration function ───────────────────────────────────────────────────
+
+function(artemis_wg_configure TARGET)
+    target_sources(${TARGET} PRIVATE ${ARTEMIS_WG_SOURCES})
+
+    target_include_directories(${TARGET} PRIVATE
+        "${CMAKE_SOURCE_DIR}/src/wg"
+        "${CMAKE_SOURCE_DIR}/deps/boringtun"  # boringtun_ffi.h
+    )
+
+    target_link_libraries(${TARGET} PRIVATE artemis_boringtun)
+
+    # libcurl (already a Sunshine dependency)
+    find_package(CURL REQUIRED)
+    target_link_libraries(${TARGET} PRIVATE CURL::libcurl)
+
+    if(WIN32)
+        target_link_libraries(${TARGET} PRIVATE
+            iphlpapi ws2_32 ntdll ole32
+        )
+    elseif(UNIX AND NOT APPLE)
+        # pthread for std::thread on Linux
+        target_link_libraries(${TARGET} PRIVATE pthread)
+    endif()
+
+    # Enable the WireGuard relay feature in Artemis source
+    target_compile_definitions(${TARGET} PRIVATE ARTEMIS_RELAY_ENABLED=1)
+
+    message(STATUS "Artemis: WireGuard relay client enabled for target '${TARGET}'")
+endfunction()