* Added plugin support

* Improved Filer (LocalFiler)
* Supports Explicit SSL/TLS with OpenSSL/Crypto
* Fixed most of the bugs that drove me nuts.
* Properly handled socket closes
* Improved socket cleanup
* Buffered file downloads
* Lots 'o errors!

I did it again! I made a single commit with everything!

CMakeLists.txt

@@ -1,12 +1,107 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.26)
-PROJECT(digftp)
+cmake_minimum_required(VERSION 3.26)
 
-SET(CMAKE_CXX_STANDARD 20)
-SET(CMAKE_CXX_STANDARD_REQUIRED True)
-SET(CMAKE_CXX_FLAGS "-O3")
-SET(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
-INCLUDE_DIRECTORIES(${CMAKE_BINARY_DIR})
+# Project definition
+project(digftp
+	VERSION 1.0.0
+	DESCRIPTION "A modern FTP server with plugin support"
+	LANGUAGES C CXX
+)
 
-ADD_SUBDIRECTORY(src)
-FILE(COPY conf DESTINATION ${CMAKE_BINARY_DIR})
-INSTALL(TARGETS ${PROJECT_NAME} RUNTIME DESTINATION bin)
+# Global settings
+set(APPNAME "digFTP")
+include(GNUInstallDirs)
+
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+
+# C++ standard requirements
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+# Build type configuration
+if(NOT CMAKE_BUILD_TYPE)
+	set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING "Choose the type of build" FORCE)
+endif()
+
+# Version handling
+if(NOT CMAKE_BUILD_TYPE MATCHES "Release")
+	if(NOT BUILD_VERSION)
+		find_package(Git QUIET)
+		if(GIT_FOUND AND EXISTS "${PROJECT_SOURCE_DIR}/.git")
+			execute_process(
+				COMMAND ${GIT_EXECUTABLE} rev-parse --short HEAD
+				WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}"
+				OUTPUT_VARIABLE BUILD_VERSION
+				ERROR_QUIET
+				OUTPUT_STRIP_TRAILING_WHITESPACE
+			)
+		else()
+			set(BUILD_VERSION "unknown")
+		endif()
+	endif()
+	set(VERSION "${BUILD_VERSION}")
+endif()
+
+# Compile Options
+option(WITH_SSL "Compile with SSL support" ON)
+
+# Path variables
+set(CONFIG_PATH "${CMAKE_INSTALL_SYSCONFDIR}/${PROJECT_NAME}")
+set(PLUGIN_PATH "${CMAKE_INSTALL_LIBDIR}/${PROJECT_NAME}/plugins")
+
+# Configure build header
+configure_file(
+	"${PROJECT_SOURCE_DIR}/src/build.h.in"
+	"${PROJECT_BINARY_DIR}/build.h"
+	@ONLY
+)
+
+# Add compile definitions
+add_compile_definitions(
+	PLUGIN_DIR="${CMAKE_INSTALL_PREFIX}/${PLUGIN_PATH}"
+	CONFIG_DIR="${CMAKE_INSTALL_PREFIX}/${CONFIG_PATH}"
+	WITH_SSL=${WITH_SSL}
+)
+
+# Dependencies
+find_package(Threads REQUIRED)
+if(WITH_SSL)
+	find_package(OpenSSL REQUIRED)
+	include_directories(${OPENSSL_INCLUDE_DIR})
+endif()
+
+# Output directories
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
+set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
+
+# Include directories
+include_directories(${CMAKE_BINARY_DIR})
+
+# Define plugins list
+set(PLUGINS
+	auth_pam
+	auth_passdb
+	filer_local
+)
+
+# Add main source directory which includes plugins
+add_subdirectory(src)
+
+# Installation
+install(
+	FILES 
+		"${PROJECT_SOURCE_DIR}/conf/ftp.conf"
+		"${PROJECT_SOURCE_DIR}/conf/motd"
+	DESTINATION 
+		"${CONFIG_PATH}"
+)
+
+install(
+	TARGETS ${PROJECT_NAME}
+	RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+)
+
+install(
+	TARGETS ${PLUGINS}
+	LIBRARY DESTINATION ${PLUGIN_PATH}
+)