LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)

# this is the list of plugins that are built into libstrongswan and charon
# also these plugins are loaded by default (if not changed in strongswan.conf)
strongswan_PLUGINS := openssl fips-prf random pubkey pkcs1 \
	pem xcbc hmac kernel-netlink socket-default android \
	eap-identity eap-mschapv2 eap-md5

# helper macros to only add source files for plugins included in the list above
# source files are relative to the android.mk that called the macro
plugin_enabled = $(findstring $(1), $(strongswan_PLUGINS))
add_plugin = $(if $(call plugin_enabled,$(1)), \
               $(patsubst $(LOCAL_PATH)/%,%, \
                 $(wildcard \
                   $(subst %,$(subst -,_,$(strip $(1))), \
                     $(LOCAL_PATH)/plugins/%/%*.c \
                    ) \
                  ) \
                ) \
              )

# includes
strongswan_PATH := $(LOCAL_PATH)
libvstr_PATH := external/strongswan-support/vstr/include
libgmp_PATH := external/strongswan-support/gmp

# CFLAGS (partially from a configure run using droid-gcc)
strongswan_CFLAGS := \
	-Wno-format \
	-Wno-pointer-sign \
	-Wno-pointer-arith \
	-Wno-sign-compare \
	-Wno-strict-aliasing \
	-DHAVE___BOOL \
	-DHAVE_STDBOOL_H \
	-DHAVE_ALLOCA_H \
	-DHAVE_ALLOCA \
	-DHAVE_CLOCK_GETTIME \
	-DHAVE_PTHREAD_COND_TIMEDWAIT_MONOTONIC \
	-DHAVE_PRCTL \
	-DHAVE_LINUX_UDP_H \
	-DHAVE_STRUCT_SADB_X_POLICY_SADB_X_POLICY_PRIORITY \
	-DHAVE_IPSEC_MODE_BEET \
	-DHAVE_IPSEC_DIR_FWD \
	-DOPENSSL_NO_EC \
	-DOPENSSL_NO_ECDSA \
	-DOPENSSL_NO_ECDH \
	-DOPENSSL_NO_ENGINE \
	-DCAPABILITIES \
	-DCAPABILITIES_NATIVE \
	-DMONOLITHIC \
	-DUSE_VSTR \
	-DROUTING_TABLE=0 \
	-DROUTING_TABLE_PRIO=220 \
	-DVERSION=\"4.5.2\" \
	-DPLUGINS='"$(strongswan_PLUGINS)"' \
	-DPLUGINDIR=\"/system/bin/ipsec\" \
	-DIPSEC_DIR=\"/system/bin\" \
	-DIPSEC_PIDDIR=\"/data/misc/vpn\" \
	-DSTRONGSWAN_CONF=\"/system/etc/strongswan.conf\" \
	-DDEV_RANDOM=\"/dev/random\" \
	-DDEV_URANDOM=\"/dev/urandom\"

# only for Android 2.0+
strongswan_CFLAGS += \
	-DHAVE_IN6ADDR_ANY

include $(addprefix $(LOCAL_PATH)/src/,$(addsuffix /Android.mk, \
		charon \
		libcharon \
		libhydra \
		libstrongswan \
	))