#
# $Id$
#
# gnu Makefile to build linux module for ipfw+dummynet

# Unless specified otherwise, variable names are arbitrary.
# Exceptions are the following:
# 
#   ccflags-y	additional $(CC) flags
#   M		used by Kbuild, we must set it to `pwd`
#   obj-m	list of .o modules to build
#   $(MOD)-y	for each $MOD in obj-m, the list of objects
#   obj-y	same as above, for openwrt
#   O_TARGET	the link target, for openwrt
#    EXTRA_CFLAGS as the name says... in openwrt
#    EXTRA_CFLAGS are used in 2.6.22 module kernel compilation too
#---

$(warning including dummynet/Makefile)

# lets default for 2.6 for planetlab builds
VER ?= 2.6

ifeq ($(VER),openwrt)

$(warning dummynet/Makefile doing openwrt)
obj-m := ipfw_mod.o
obj-y := ipfw2_mod.o bsd_compat.o \
	in_cksum.o ip_dummynet.o ip_fw2.o ip_fw_pfil.o
O_TARGET := ipfw_mod.o

xcflags-y += -O1 -DLINUX_24
xcflags-y += -DIPFIREWALL_DEFAULT_TO_ACCEPT
xcflags-y += -g
xcflags-y += -D_BSD_SOURCE	# enable __FAVOR_BSD (udp/tcp bsd struct over posix)
xcflags-y += -DKERNEL_MODULE	# linux kernel module
xcflags-y += -I include_e -I include
xcflags-y += -include ../glue.h	# headers

EXTRA_CFLAGS := $(xcflags-y)

# we should not export anything
#export-objs := ipfw2_mod.o
-include $(TOPDIR)/Rules.make

else	# !openwrt

obj-m := ipfw_mod.o
ifneq ($(shell echo $(VER)|grep '2.4'),)
  $(warning "---- Building for Version $(VER)")
  KERNELDIR := -isystem /usr/src/linux-2.4.35.4/include
  # replace the system include directory
  WARN += -nostdinc -isystem /usr/lib/gcc/i486-linux-gnu/4.2.4/include
  #WARN = -Wp,-MD,/home/luigi/ports-luigi/dummynet-branches/ipfw_mod/dummynet/.ipfw2_mod.o.d
  #WARN += -Iinclude  -include include/linux/autoconf.h
  WARN += -Wall -Wundef
  WARN += -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
  WARN += -fno-common -Werror-implicit-function-declaration
  # WARN += -O2  -fno-stack-protector -m32 -msoft-float -mregparm=3
  # -mregparm=3 gives a printk error
  WARN += -m32 -msoft-float # -mregparm=3
  #WARN += -freg-struct-return -mpreferred-stack-boundary=2
  WARN += -Wno-sign-compare
  WARN += -Wdeclaration-after-statement -Wno-pointer-sign 

  ccflags-y += -O1 -DLINUX_24
  CFLAGS = -DMODULE -D__KERNEL__ ${KERNELDIR} ${ccflags-y}
  # The Main target
all: mod24

else
  # KERNELDIR is where the kernel headers reside
  # XXX on Planetlab, KERNELDIR must be same as KERNELPATH
  KERNELDIR ?= $(KERNELPATH)
  # KERNELDIR := /home/luigi/linux-2.6.25.17/
  # test on rock
  #KERNELDIR := /usr/src/linux-2.6.24	# not with v.2237
  #KERNELDIR := /usr/src/linux-2.6.26
  #KERNELDIR := /usr/src/linux-2.6.22
  #KERNELDIR := /usr/src/linux-source-2.6.26
  #KERNELDIR := /lib/modules/`uname -r`/build
  $(warning "---- Building Version 2.6 $(VER) in $(KERNELDIR)")
  WARN := -O1 -Wall -Werror -DDEBUG_SPINLOCK -DDEBUG_MUTEXES
  # The main target

  # Required by kernel <= 2.6.22, ccflags-y is used on newer version
LINUX_VERSION_CODE := $(shell grep LINUX_VERSION_CODE $(KERNELDIR)/include/linux/version.h|cut -d " " -f3)
ifeq ($(LINUX_VERSION_CODE),132630)
  EXTRA_CFLAGS += $(ccflags-y)
endif

all: include_e
	$(MAKE) -C $(KERNELDIR) V=1 M=`pwd` modules
endif

# the list of object use to build the module
ipfw_mod-y = $(IPFW_SRCS:%.c=%.o)

#	Original ipfw + dummynet + FreeBSD stuff,
IPFW_SRCS = ip_fw2.c ip_dummynet.c ip_fw_pfil.c in_cksum.c

#	module glue and functions missing in linux
IPFW_SRCS += ipfw2_mod.c bsd_compat.c


# additional $(CC) flags
ccflags-y += $(WARN)
ccflags-y += -DIPFIREWALL_DEFAULT_TO_ACCEPT
ccflags-y += -g
ccflags-y += -D_BSD_SOURCE		# enable __FAVOR_BSD (udp/tcp bsd structure over posix)
ccflags-y += -DKERNEL_MODULE		# linux kernel module
ccflags-y += -I $(M)/include_e -I $(M)/include
ccflags-y += -include $(M)/../glue.h	# headers

mod24: include_e $(obj-m)

$(obj-m): $(ipfw_mod-y)
	$(LD) $(LDFLAGS) -m elf_i386 -r -o $@ $^
clean:
	-rm -f *.o *.ko Module.symvers *.mod.c

distclean: clean
	-rm -f .*cmd modules.order opt_*
	-rm -rf .tmp_versions include_e

# support to create empty dirs and files in include_e/
# EDIRS is the list of directories, EFILES is the list of files.

EDIRS= altq arpa machine net netinet netinet6 sys

EFILES += opt_inet6.h opt_ipfw.h opt_ipsec.h opt_mac.h
EFILES += opt_mbuf_stress_test.h opt_param.h

EFILES += altq/if_altq.h
EFILES += arpa/inet.h
EFILES += machine/in_cksum.h
EFILES += net/ethernet.h net/netisr.h net/pf_mtag.h net/radix.h

EFILES += netinet/ether.h netinet/icmp6.h netinet/if_ether.h
EFILES += netinet/in.h netinet/in_pcb.h netinet/in_var.h
EFILES +=  netinet/ip_carp.h netinet/ip_var.h netinet/pim.h
EFILES += netinet/sctp.h netinet/tcp_timer.h netinet/tcpip.h
EFILES += netinet/udp_var.h

EFILES += netinet6/ip6_var.h

EFILES += sys/_lock.h sys/_mutex.h sys/jail.h
EFILES += sys/limits.h sys/lock.h sys/mutex.h sys/priv.h
EFILES += sys/proc.h sys/rwlock.h sys/socket.h sys/socketvar.h
EFILES += sys/sysctl.h sys/time.h sys/ucred.h

M ?= $(shell pwd)
include_e:
	echo "running in $M"
	-@rm -rf $(M)/include_e opt_*
	-@mkdir -p $(M)/include_e
	-@(cd $(M)/include_e; mkdir -p $(EDIRS); touch $(EFILES) )

endif # !openwrt