#
# Copyright (C) 2006 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
# $Id$

include $(TOPDIR)/rules.mk

PKG_NAME:=knock
PKG_VERSION:=0.5
PKG_RELEASE:=1

PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
PKG_SOURCE_URL:=http://www.zeroflux.org/knock/files/
PKG_MD5SUM:=ca09d61458974cff90a700aba6120891
PKG_CAT:=zcat

PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION)
PKG_INSTALL_DIR:=$(PKG_BUILD_DIR)/ipkg-install

include $(INCLUDE_DIR)/package.mk

define Package/knock/Default
  SECTION:=net
  CATEGORY:=Network
  DEPENDS:=+libpcap
  TITLE:=Port-knocking
  URL:=http://www.zeroflux.org/cgi-bin/cvstrac/knock/wiki
endef

define Package/knock
  $(call Package/knock/Default)
  TITLE+= client
endef

define Package/knock/description
=
	It listens to all traffic on an ethernet (or PPP) interface, 
	looking for special "knock" sequences of port-hits. A client 
	makes these port-hits by sending a TCP (or UDP) packet to a 
	port on the server. This port need not be open -- since 
	knockd listens at the link-layer level, it sees all traffic 
	even if it's destined for a closed port. When the server 
	detects a specific sequence of port-hits, it runs a command 
	defined in its configuration file. This can be used to open 
	up holes in a firewall for quick access.	
	This package contains the port-knocking client.
endef

define Package/knockd
  $(call Package/knock/Default)
  TITLE+= server
endef

define Package/knockd/description
=
	It listens to all traffic on an ethernet (or PPP) interface, 
	looking for special "knock" sequences of port-hits. A client 
	makes these port-hits by sending a TCP (or UDP) packet to a 
	port on the server. This port need not be open -- since 
	knockd listens at the link-layer level, it sees all traffic 
	even if it's destined for a closed port. When the server 
	detects a specific sequence of port-hits, it runs a command 
	defined in its configuration file. This can be used to open 
	up holes in a firewall for quick access.	
	This package contains the port-knocking server.
endef

define Package/knockd/conffiles
/etc/knockd.conf
endef

define Build/Configure
	$(call Build/Configure/Default, \
		, \
		CFLAGS="$$$$CFLAGS $$$$CPPFLAGS" \
                ac_cv_lib_pcap_pcap_open_live=yes \
        )
endef
	
define Build/Compile	
	$(MAKE) -C $(PKG_BUILD_DIR) \
		DESTDIR="$(PKG_INSTALL_DIR)" \
		all install
endef
	
define Package/knock/install	
	$(INSTALL_DIR) $(1)/usr/bin
	$(CP) $(PKG_INSTALL_DIR)/usr/bin/knock $(1)/usr/bin/
endef

define Package/knockd/install
	$(INSTALL_DIR) $(1)/etc
	$(INSTALL_CONF) $(PKG_INSTALL_DIR)/etc/knockd.conf $(1)/etc/
	$(INSTALL_DIR) $(1)/usr/sbin
	$(CP) $(PKG_INSTALL_DIR)/usr/sbin/knockd $(1)/usr/sbin/
endef

$(eval $(call BuildPackage,knock))
$(eval $(call BuildPackage,knockd))