##
##  uAnytun
##
##  uAnytun is a tiny implementation of SATP. Unlike Anytun which is a full
##  featured implementation uAnytun has no support for multiple connections
##  or synchronisation. It is a small single threaded implementation intended
##  to act as a client on small platforms.
##  The secure anycast tunneling protocol (satp) defines a protocol used
##  for communication between any combination of unicast and anycast
##  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
##  mode and allows tunneling of every ETHER TYPE protocol (e.g.
##  ethernet, ip, arp ...). satp directly includes cryptography and
##  message authentication based on the methodes used by SRTP.  It is
##  intended to deliver a generic, scaleable and secure solution for
##  tunneling and relaying of packets of any protocol.
##  
##
##  Copyright (C) 2007-2008 Christian Pointner <equinox@anytun.org>
##
##  This file is part of uAnytun.
##
##  uAnytun is free software: you can redistribute it and/or modify
##  it under the terms of the GNU General Public License version 3 as
##  published by the Free Software Foundation.
##
##  uAnytun is distributed in the hope that it will be useful,
##  but WITHOUT ANY WARRANTY; without even the implied warranty of
##  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
##  GNU General Public License for more details.
##
##  You should have received a copy of the GNU General Public License
##  along with uAnytun. If not, see <http://www.gnu.org/licenses/>.
##

ifneq ($(MAKECMDGOALS),distclean)
include include.mk
endif

EXECUTABLE := uanytun

CRYPT_OBJ := key_derivation.o \
            auth_algo.o
OBJ := log.o \
      string_list.o \
      sig_handler.o \
      options.o \
      tun.o \
      udp.o \
      plain_packet.o \
      encrypted_packet.o \
      seq_window.o \
      cipher.o \
      uanytun.o


ifndef NO_CRYPT_OBJ
OBJ += $(CRYPT_OBJ)
endif

SRC := $(OBJ:%.o=%.c)

.PHONY: clean distclean manpage install install-bin install-etc install-man remove purge

all: $(EXECUTABLE)

%.d: %.c
	@set -e; rm -f $@; \
	 $(CC) -MM $(CFLAGS) $< > $@.$$$$; \
   sed 's,\($*\)\.o[ :]*,\1.o $@ : ,g' < $@.$$$$ > $@; \
   rm -f $@.$$$$; echo '(re)building $@'

ifneq ($(MAKECMDGOALS),distclean)
-include $(SRC:%.c=%.d)
endif

uanytun: $(OBJ)
	$(CC) $(OBJ) -o $@ $(LDFLAGS)

%.o: %.c
	$(CC) $(CFLAGS) -c $<


distclean: clean
	find . -name *.o -exec rm -f {} \;
	find . -name "*.\~*" -exec rm -rf {} \;
	rm -f include.mk
	rm -f tun.c

clean:
	rm -f *.o
	rm -f *.d
	rm -f *.d.*
	rm -f $(EXECUTABLE)

manpage:
	$(MAKE) --directory="../doc/" manpage

install: all install-bin install-etc install-man add-user

install-bin: $(EXECUTABLE)
	mkdir -p $(DESTDIR)$(SBINDIR)
	install -m 755 $(EXECUTABLE) $(DESTDIR)$(SBINDIR)
	$(STRIP) $(DESTDIR)$(SBINDIR)/$(EXECUTABLE)

install-etc:
	mkdir -p $(DESTDIR)$(ETCDIR)/uanytun
	install -m 644 ../etc/uanytun/autostart $(DESTDIR)$(ETCDIR)/uanytun/autostart
	@( cd '../etc/uanytun/' ;                                                                                \
     for dir in `ls`; do                                                                                   \
       if [ -d $$dir ]; then                                                                               \
         echo "install $$dir configuration" ;                                                              \
         cd $$dir ;                                                                                        \
         mkdir -p $(DESTDIR)$(ETCDIR)/uanytun/$$dir ;                                                      \
         install -m 600 config $(DESTDIR)$(ETCDIR)/uanytun/$$dir/config ;                                  \
         sed -i 's#username uanytun#username $(USERNAME)#' $(DESTDIR)$(ETCDIR)/uanytun/$$dir/config ;      \
         sed -i 's#groupname uanytun#groupname $(USERNAME)#' $(DESTDIR)$(ETCDIR)/uanytun/$$dir/config ;    \
         sed -i 's#chroot /var/run/uanytun#chroot $(USERHOME)#' $(DESTDIR)$(ETCDIR)/uanytun/$$dir/config ; \
         if [ -e 'post-up.sh' ]; then                                                                      \
           install -m 755 post-up.sh $(DESTDIR)$(ETCDIR)/uanytun/$$dir/post-up.sh ;                        \
         fi ;                                                                                              \
         cd .. ;                                                                                           \
       fi ;                                                                                                \
     done                                                                                                  \
   )
	mkdir -p $(DESTDIR)$(ETCDIR)/init.d
	install -m 755 ../etc/init.d/uanytun $(DESTDIR)$(ETCDIR)/init.d/$(EXECUTABLE)
	@ sed -i 's#DAEMON=/usr/sbin/uanytun#DAEMON=$(SBINDIR)/$(EXECUTABLE)#' $(DESTDIR)$(ETCDIR)/init.d/$(EXECUTABLE)
	@ sed -i 's#CONFIG_DIR=/etc/uanytun#CONFIG_DIR=$(ETCDIR)/uanytun#' $(DESTDIR)$(ETCDIR)/init.d/$(EXECUTABLE)

install-man: manpage
	mkdir -p $(DESTDIR)$(MANDIR)/man8/
	cp ../doc/uanytun.8 $(DESTDIR)$(MANDIR)/man8/$(EXECUTABLE).8
	gzip $(DESTDIR)$(MANDIR)/man8/$(EXECUTABLE).8

add-user:
	@ adduser --system --group --home $(USERHOME) $(USERNAME)

remove-user: 
	@ deluser $(USERNAME)
	@ rm -rf $(USERHOME)

remove:
	rm -f $(DESTDIR)$(SBINDIR)/$(EXECUTABLE)
	rm -f $(DESTDIR)$(MANDIR)/man8/$(EXECUTABLE).8.gz
	rm -f $(DESTDIR)$(ETCDIR)/init.d/$(EXECUTABLE)

purge: remove remove-user
	rm -rf $(DESTDIR)$(ETCDIR)/uanytun/