GNU-makefile for NPcap's NPF.sys driver

Makefile.Windows

#
# GNU Makefile for the 'NPcap driver'.
# For MSVC + clang-cl, 32/64 bits.
#
# By <gvanem@yahoo.no> 2023.
#
TARGETS   := NPcap.sys
THIS_FILE := Makefile.Windows
MAKEFLAGS += --warn-undefined-variables

USE_ASTYLE ?= 1
PYTHON     ?= py -3

ifeq ($(CPU),x86)
  BITS = 32
else ifeq ($(CPU),x64)
  BITS = 64
else
  $(error Unsupported CPU=$(CPU))
endif

export CL=

GENERATED = $(OBJ_DIR)/NPcap_hacks.h

NPF_DIR = packetWin7/npf/npf

#
# The default install location for the 'Windows Device Driver Kit' is
# alongside the user-mode Windows-Kit:
# Kernel-mode ('KM') headers under:
#
#   $(WindowsSdkDir)/Include/$(WindowsSdkVer)/km
#
# and libraries under:
#
#   $(WindowsSdkDir)/Lib/$(WindowsSdkVer)/km/$(CPU)
#
KM_INCDIR   = $(realpath $(WindowsSdkDir))/Include/$(WindowsSdkVer)/km
KM_LIBDIR   = $(realpath $(WindowsSdkDir))/Lib/$(WindowsSdkVer)/km

TOOLS_ROOT  = $(realpath $(VCToolkitInstallDir))
UCRT_LIBDIR = $(realpath $(WindowsSdkDir))/Lib/$(WindowsSdkVer)/ucrt/$(CPU)
UM_LIBDIR   = $(realpath $(WindowsSdkDir))/Lib/$(WindowsSdkVer)/um/$(CPU)
CRT_LIBDIR  = $(TOOLS_ROOT)/lib/$(CPU)

define Usage

  Usage: "make -f $(THIS_FILE) <CPU=x86|x64> CC=[cl | clang-cl] [all | clean | realclean | depend]"
  Specify CC=cl       - use MSVC
  Specify CC=clang-cl - use clang-cl
endef

CFLAGS = -nologo -MT -Ot -GS- \
         -Gz -Zi -Zo -Oy-     \
         -I$(KM_INCDIR)       \
         -I.                  \
         -FI./$(OBJ_DIR)/NPcap_hacks.h

LDFLAGS = -nologo -verbose -incremental:no \
          -map -debug -machine:$(CPU)      \
          -nodefaultlib:oldnames.lib       \
          -libpath:$(UCRT_LIBDIR)          \
          -libpath:$(CRT_LIBDIR)

OBJ_DIR = objects

ifeq ($(CC),cl)
  _CC     = $(TOOLS_ROOT)/bin/HostX86/$(CPU)/cl.exe
  CFLAGS += -W4

else ifeq ($(CC),clang-cl)
  #
  # The 'clang-cl.bat' (on PATH) should look like this:
  #   @echo off
  #   setlocal
  #   set CL_32=f:\ProgramFiler\LLVM-15-32bit  << install base of your 32-bit Clang
  #   set CL_64=f:\ProgramFiler\LLVM-15-64bit  << ditto for 64-bit
  #   if %1. == -m32. (
  #     shift
  #     %CL_32%\bin\clang-cl.exe %*
  #   ) else if %1. == -m64. (
  #     shift
  #     %CL_64%\bin\clang-cl.exe %*
  #   ) else (
  #     clang-cl.exe %*
  #   )
  #
  _CC = clang-cl.bat -m$(BITS)

  CFLAGS += -Wall           \
            -ferror-limit=5 \
            -fms-compatibility
else
  $(error $(Usage))
endif

vpath %.c $(NPF_DIR)

C_SOURCES = $(addprefix $(NPF_DIR)/, \
              Loopback.c             \
              Openclos.c             \
              Packet.c               \
              Read.c                 \
              Write.c                \
              win_bpf_filter.c)

C_OBJECTS = $(addprefix $(OBJ_DIR)/, $(notdir $(C_SOURCES:.c=.obj)))

all: $(GENERATED) $(TARGETS) epilogue

epilogue:
	$(call green_msg, Welcome to $(BRIGHT_WHITE)$(TARGETS))

WDK_LIBS = $(KM_LIBDIR)/$(CPU)/fwpkclnt.lib \
           $(KM_LIBDIR)/$(CPU)/ndis.lib     \
           $(KM_LIBDIR)/$(CPU)/wdm.lib      \
           $(KM_LIBDIR)/$(CPU)/wdmsec.lib   \
           $(UM_LIBDIR)/kernel32.lib        \
           $(UM_LIBDIR)/uuid.lib

SYS_LDFLAGS = -entry:DriverEntry       \
              -integritycheck          \
              -brepro                  \
              -dependentloadflag:0x800 \
              -subsystem:native

NPcap.sys: $(C_OBJECTS) $(OBJ_DIR)/npcap.res $(WDK_LIBS) | check-for-unused-libs.py
	$(call link_SYS, $@, $(SYS_LDFLAGS) $^)

$(OBJ_DIR)/NPcap_hacks.h: $(THIS_FILE) | $(OBJ_DIR)
	$(call generate_c, $@,$(NPcap_hacks_H))

$(OBJ_DIR):
	- mkdir $@

$(OBJ_DIR)/%.obj: %.c | $(CC).args
	$(call C_compile, $@, $<)

$(OBJ_DIR)/%.res: $(NPF_DIR)/%.rc
	$(call make_res, $@, $<)

clean:
	rm -f vc1*.pdb link.tmp link.args cl.args clang-cl.args \
	      NPcap.{map,pdb} cpp-filter.py check-for-unused-libs.py
	rm -fr $(OBJ_DIR)

$(CC).args: $(THIS_FILE)
	$(call green_msg, All CFLAGS are in $(BRIGHT_WHITE)$@)
	$(call create_resp_file, $@, -c $(call put_D_CFLAGS_first, $(CFLAGS)))

realclean vclean: clean
	rm -f .depend.Windows $(sort $(TARGETS) $(TARGETS:.sys=.{map,pdb,exp}))

%.i: %.c FORCE cpp-filter.py $(GENERATED) $(CC).args
	$(call C_preprocess, $@, $<)

FORCE:

cpp-filter.py: $(THIS_FILE)
	$(call generate_py, $@, $(CPP_FILTER_PY))

check-for-unused-libs.py: $(THIS_FILE)
	$(call generate_py, $@, $(CHECK_FOR_UNUSED_LIBS_PY))

#
# GNU-make macros:
#
put_D_CFLAGS_first = $(filter     -D%, $(1)) \
                     $(filter-out -D%, $(1))

BRIGHT_GREEN = \e[1;32m
BRIGHT_WHITE = \e[1;37m

green_msg  = @echo -e "$(BRIGHT_GREEN)$(strip $(1))\e[0m"

define C_compile
  $(_CC) @$(CC).args -Fo./$(strip $(1)) $(2)
  @echo
endef

define link_SYS
  $(call green_msg, Linking $(1))
  $(call create_resp_file, link.args, $(LDFLAGS) $(2))
  link -out:$(strip $(1)) @link.args > link.tmp
  @cat link.tmp >> $(1:.sys=.map)
  @$(PYTHON) check-for-unused-libs.py link.tmp
endef

define make_res
  rc -nologo -fo $(1) $(2)
  @echo
endef

define create_resp_file
  $(file > $(1))
  $(foreach f, $(2), $(file >> $(1),$(strip $(f))) )
endef

define generate
  $(call green_msg, Generating $(1).)
  $(call Warning, $(1),$(2))
endef

define generate_c
  $(call generate, $(1), //)
  $(file >> $(1),$(2))
endef

define generate_py
  $(call generate, $(1), #)
  $(file >> $(1),if 1:)
  $(file >> $(1),$(2))
endef

define Warning
  $(file  > $(1),$(2))
  $(file >> $(1),$(2) This file was generated at $(shell date +%d-%B-%Y) from)
  $(file >> $(1),$(2) $(realpath $(THIS_FILE)).)
  $(file >> $(1),$(2) DO NOT EDIT!)
  $(file >> $(1),$(2))
endef

#
# clang-cl: /d1PP  Retain macro definitions in /E mode
#
ifeq ($(CC),clang-cl)
  d1PP = -d1PP
else
  d1PP =
endif

ifeq ($(USE_ASTYLE),1)
  C_preprocess_filter  = | astyle
  C_preprocess_comment = and AStyle'd
else
  C_preprocess_filter  =
  C_preprocess_comment = raw
endif

define C_preprocess
  $(file > $(1),/* The preprocessed $(C_preprocess_comment) output of '$(filter %.c, $(strip $(2)))':)
  $(foreach f, $(_CC) -E $(CFLAGS) $(d1PP), $(file >> $(1), * $(f)))
  $(file >> $(1), *)
  $(file >> $(1), * Try compiling it with '$(strip $(_CC) -c -Tc $(1))')
  $(file >> $(1), *---------------------------------------------------------------------)
  $(file >> $(1), */)
  $(_CC) -E @$(CC).args $(d1PP) $(2) | $(PYTHON) cpp-filter.py $(C_preprocess_filter) >> $(1)
endef

define NPcap_hacks_H
  #ifndef NPcap_hacks_H
  #define NPcap_hacks_H

  #if defined(__clang__)
    #define NDIS_FILTER_MAJOR_VERSION  6
    #define NDIS_FILTER_MINOR_VERSION  0
    #define NDIS_WRAPPER               1
    #define EXPORT

    /*
     * 'clang-cl -Wall' generates tons of warnings.
     * Especially from the Windows DDK.
     */
    #pragma clang diagnostic ignored "-Wundef"
    #pragma clang diagnostic ignored "-Wcomment"
    #pragma clang diagnostic ignored "-Wcast-align"
    #pragma clang diagnostic ignored "-Wcast-qual"
    #pragma clang diagnostic ignored "-Wcast-function-type-strict"
    #pragma clang diagnostic ignored "-Wimplicit-int-conversion"
    #pragma clang diagnostic ignored "-Wbad-function-cast"
    #pragma clang diagnostic ignored "-Wlanguage-extension-token"
    #pragma clang diagnostic ignored "-Wdeclaration-after-statement"
    #pragma clang diagnostic ignored "-Wreserved-identifier"
    #pragma clang diagnostic ignored "-Wunsafe-buffer-usage"
    #pragma clang diagnostic ignored "-Wvisibility"
    #pragma clang diagnostic ignored "-Wsizeof-array-div"
    #pragma clang diagnostic ignored "-Wsign-compare"
    #pragma clang diagnostic ignored "-Wsign-conversion"
    #pragma clang diagnostic ignored "-Wpragma-pack"
    #pragma clang diagnostic ignored "-Wfour-char-constants"
    #pragma clang diagnostic ignored "-Wflexible-array-extensions"
    #pragma clang diagnostic ignored "-Wdocumentation"
    #pragma clang diagnostic ignored "-Wswitch-enum"
    #pragma clang diagnostic ignored "-Wextra-tokens"
    #pragma clang diagnostic ignored "-Wextra-semi"
    #pragma clang diagnostic ignored "-Wextra-semi-stmt"
    #pragma clang diagnostic ignored "-Wredundant-parens"
    #pragma clang diagnostic ignored "-Wpointer-sign"
    #pragma clang diagnostic ignored "-Wunused-macros"
    #pragma clang diagnostic ignored "-Wunused-parameter"
    #pragma clang diagnostic ignored "-Wunused-value"
    #pragma clang diagnostic ignored "-Wunused-variable"
    #pragma clang diagnostic ignored "-Wunused-but-set-variable"
    #pragma clang diagnostic ignored "-Wunused-local-typedef"
    #pragma clang diagnostic ignored "-Wmissing-noreturn"
    #pragma clang diagnostic ignored "-Wmissing-prototypes"
    #pragma clang diagnostic ignored "-Wmissing-variable-declarations"
    #pragma clang diagnostic ignored "-Wunknown-pragmas"
    #pragma clang diagnostic ignored "-Wstrict-prototypes"
    #pragma clang diagnostic ignored "-Wunreachable-code-break"
    #pragma clang diagnostic ignored "-Wint-conversion"
    #pragma clang diagnostic ignored "-Wduplicate-enum"
    #pragma clang diagnostic ignored "-Wint-to-void-pointer-cast"
    #pragma clang diagnostic ignored "-Wincompatible-pointer-types"
    #pragma clang diagnostic ignored "-Wignored-attributes"
    #pragma clang diagnostic ignored "-Wignored-pragma-intrinsic"
    #pragma clang diagnostic ignored "-Wmicrosoft-anon-tag"
    #pragma clang diagnostic ignored "-Wmicrosoft-enum-value"
    #pragma clang diagnostic ignored "-Wmicrosoft-enum-forward-reference"
    #pragma clang diagnostic ignored "-Wmicrosoft-flexible-array"
    #pragma clang diagnostic ignored "-Wgnu-zero-variadic-macro-arguments"

    #if defined(i386)
      #pragma clang diagnostic ignored "-Wmissing-prototype-for-cc"
    #endif

  #elif defined(_MSC_VER)
    #pragma warning (disable:4024 4047 4057 4100 4189 4306 4324 4389)
  #endif

  #define HAVE_DOT11_SUPPORT         1
  #define HAVE_WFP_LOOPBACK_SUPPORT  1
  #define HAVE_RX_SUPPORT            1
  #define NDIS630                    1
  #define WINVER                     0x0602
  #define _WIN32_WINNT               0x0602
  #define NTDDI_VERSION              0x06020000

  #define _CRT_SECURE_NO_WARNINGS     1
  #define _CRT_NONSTDC_NO_DEPRECATE   1

//#define UNICODE
//#define _UNICODE
//#define MICROSOFT_WINDOWS_WINBASE_H_DEFINE_INTERLOCKED_CPLUSPLUS_OVERLOADS 0
//#define RELOCATABLE_USER_SHARED_DATA 1

  #define _KERNEL_MODE                 1
  #define POOL_NX_OPTIN                1
  #define POOL_ZERO_DOWN_LEVEL_SUPPORT 1

  #define BITS                         $(BITS)

  #if (BITS == 32)
    #define _X86_    1
    #define i386     1
    #define STD_CALL 1
  #elif (BITS == 64)
    #define _WIN64  1
    #define _AMD64_ 1
    #define AMD64   1
  #else
    #error "Define 'BITS' to either '32' or '64'."
  #endif

  #endif  /* NPcap_hacks_H */
endef

define CPP_FILTER_PY
 import sys, os

  empty_lines = 0
  while True:
    line = sys.stdin.readline()
    if not line:
       break
    line = line.rstrip()
    if line == "":
       empty_lines += 1
       continue

    if line.lstrip().startswith("# "):
       line = line.replace (r"# ", "#line ")

    if line.lstrip().startswith("#line"):
       line = line.replace (r"\\", "/")

    print (line)
    if line == "}" or line == "};":
       print ("")

  print ("Removed %d empty lines." % empty_lines, file=sys.stderr)
endef

define CHECK_FOR_UNUSED_LIBS_PY
 import os, sys

  map_file = sys.argv[1]

  class State():
    IDLE   = 0
    UNUSED = 1

  class Color():
    RESET = RED = WHITE = ""

  try:
    from colorama import init, Fore, Style
    init()
    Color.RESET = Style.RESET_ALL
    Color.RED   = Fore.RED + Style.BRIGHT
    Color.WHITE = Fore.WHITE + Style.BRIGHT
  except:
    pass

  def cprint (color, s):
    print ("%s%s%s" % (color, s, Color.RESET))

  def report (unused):
    num = len(unused)
    plural = [ "library", "libraries" ]
    if num > 0:
       cprint (Color.RED, "%d unused %s in %s:" % (num, plural[num > 1], map_file))
       for u in unused:
           print ("  " + u)
    cprint (Color.WHITE, "Done.\n")

  def process (state):
    unused_libs = []
    f = open (map_file, "rt")
    lines = f.readlines()
    f.close()
    for l in lines:
        l = l.strip()
        if l == "Unused libraries:":
           state = State.UNUSED
           continue
        if state == State.UNUSED:
           if l == "":
              break
           unused_libs.append (l)
    return unused_libs

  report (process(State.IDLE))
endef

DEP_CFLAGS = -MM $(filter -D% -I%, $(CFLAGS)) \
             -DNDIS_SUPPORT_NDIS620=1         \
             -D_NDIS_                         \
             -D_NTDDK_                        \
             -D_NTIFS_                        \
             -D_WDMDDK_                       \
             -DFWPSX_H

DEP_REPLACE = -e 's@\(.*\)\.o: @\n$$(OBJ_DIR)\/\1.obj: @' \
              -e 's@$(OBJ_DIR)@$$(OBJ_DIR)@'              \
              -e 's@$(KM_INCDIR)@$$(KM_INCDIR)@'          \
              -e 's@$(NPF_DIR)@$$(NPF_DIR)@'

depend: $(GENERATED)
	$(call green_msg, Generating dependencies for $(words $(C_SOURCES)) .c-files...)
	$(call Warning, .depend.Windows, #)
	gcc $(DEP_CFLAGS) $(C_SOURCES) | sed $(DEP_REPLACE) >> .depend.Windows

-include .depend.Windows