diff -N -u xtables-addons.ori/if.h.diff xtables-addons/if.h.diff
--- xtables-addons.ori/if.h.diff	1970-01-01 01:00:00.000000000 +0100
+++ xtables-addons/if.h.diff	2016-05-15 13:19:41.000000000 +0200
@@ -0,0 +1,129 @@
+--- if.h.ori	2016-05-15 13:18:46.336064705 +0200
++++ if.h	2016-05-15 13:15:21.000000000 +0200
+@@ -38,48 +38,6 @@
+ 
+ 
+ #ifdef __USE_MISC
+-/* Standard interface flags. */
+-enum
+-  {
+-    IFF_UP = 0x1,		/* Interface is up.  */
+-# define IFF_UP	IFF_UP
+-    IFF_BROADCAST = 0x2,	/* Broadcast address valid.  */
+-# define IFF_BROADCAST	IFF_BROADCAST
+-    IFF_DEBUG = 0x4,		/* Turn on debugging.  */
+-# define IFF_DEBUG	IFF_DEBUG
+-    IFF_LOOPBACK = 0x8,		/* Is a loopback net.  */
+-# define IFF_LOOPBACK	IFF_LOOPBACK
+-    IFF_POINTOPOINT = 0x10,	/* Interface is point-to-point link.  */
+-# define IFF_POINTOPOINT IFF_POINTOPOINT
+-    IFF_NOTRAILERS = 0x20,	/* Avoid use of trailers.  */
+-# define IFF_NOTRAILERS	IFF_NOTRAILERS
+-    IFF_RUNNING = 0x40,		/* Resources allocated.  */
+-# define IFF_RUNNING	IFF_RUNNING
+-    IFF_NOARP = 0x80,		/* No address resolution protocol.  */
+-# define IFF_NOARP	IFF_NOARP
+-    IFF_PROMISC = 0x100,	/* Receive all packets.  */
+-# define IFF_PROMISC	IFF_PROMISC
+-
+-    /* Not supported */
+-    IFF_ALLMULTI = 0x200,	/* Receive all multicast packets.  */
+-# define IFF_ALLMULTI	IFF_ALLMULTI
+-
+-    IFF_MASTER = 0x400,		/* Master of a load balancer.  */
+-# define IFF_MASTER	IFF_MASTER
+-    IFF_SLAVE = 0x800,		/* Slave of a load balancer.  */
+-# define IFF_SLAVE	IFF_SLAVE
+-
+-    IFF_MULTICAST = 0x1000,	/* Supports multicast.  */
+-# define IFF_MULTICAST	IFF_MULTICAST
+-
+-    IFF_PORTSEL = 0x2000,	/* Can set media type.  */
+-# define IFF_PORTSEL	IFF_PORTSEL
+-    IFF_AUTOMEDIA = 0x4000,	/* Auto media select active.  */
+-# define IFF_AUTOMEDIA	IFF_AUTOMEDIA
+-    IFF_DYNAMIC = 0x8000	/* Dialup device with changing addresses.  */
+-# define IFF_DYNAMIC	IFF_DYNAMIC
+-  };
+-
+ /* The ifaddr structure contains information about one address of an
+    interface.  They are maintained by the different address families,
+    are allocated and attached when an address is set, and are linked
+@@ -100,54 +58,13 @@
+ # define ifa_broadaddr	ifa_ifu.ifu_broadaddr	/* broadcast address	*/
+ # define ifa_dstaddr	ifa_ifu.ifu_dstaddr	/* other end of link	*/
+ 
+-/* Device mapping structure. I'd just gone off and designed a
+-   beautiful scheme using only loadable modules with arguments for
+-   driver options and along come the PCMCIA people 8)
+-
+-   Ah well. The get() side of this is good for WDSETUP, and it'll be
+-   handy for debugging things. The set side is fine for now and being
+-   very small might be worth keeping for clean configuration.  */
+-
+-struct ifmap
+-  {
+-    unsigned long int mem_start;
+-    unsigned long int mem_end;
+-    unsigned short int base_addr;
+-    unsigned char irq;
+-    unsigned char dma;
+-    unsigned char port;
+-    /* 3 bytes spare */
+-  };
+ 
++  # define IFNAMSIZ	IF_NAMESIZE
++  
+ /* Interface request structure used for socket ioctl's.  All interface
+    ioctl's must have parameter definitions which begin with ifr_name.
+    The remainder may be interface specific.  */
+ 
+-struct ifreq
+-  {
+-# define IFHWADDRLEN	6
+-# define IFNAMSIZ	IF_NAMESIZE
+-    union
+-      {
+-	char ifrn_name[IFNAMSIZ];	/* Interface name, e.g. "en0".  */
+-      } ifr_ifrn;
+-
+-    union
+-      {
+-	struct sockaddr ifru_addr;
+-	struct sockaddr ifru_dstaddr;
+-	struct sockaddr ifru_broadaddr;
+-	struct sockaddr ifru_netmask;
+-	struct sockaddr ifru_hwaddr;
+-	short int ifru_flags;
+-	int ifru_ivalue;
+-	int ifru_mtu;
+-	struct ifmap ifru_map;
+-	char ifru_slave[IFNAMSIZ];	/* Just fits the size */
+-	char ifru_newname[IFNAMSIZ];
+-	__caddr_t ifru_data;
+-      } ifr_ifru;
+-  };
+ # define ifr_name	ifr_ifrn.ifrn_name	/* interface name 	*/
+ # define ifr_hwaddr	ifr_ifru.ifru_hwaddr	/* MAC address 		*/
+ # define ifr_addr	ifr_ifru.ifru_addr	/* address		*/
+@@ -168,20 +85,6 @@
+ # define _IOT_ifreq_short _IOT(_IOTS(char),IFNAMSIZ,_IOTS(short),1,0,0)
+ # define _IOT_ifreq_int	_IOT(_IOTS(char),IFNAMSIZ,_IOTS(int),1,0,0)
+ 
+-
+-/* Structure used in SIOCGIFCONF request.  Used to retrieve interface
+-   configuration for machine (useful for programs which must know all
+-   networks accessible).  */
+-
+-struct ifconf
+-  {
+-    int	ifc_len;			/* Size of buffer.  */
+-    union
+-      {
+-	__caddr_t ifcu_buf;
+-	struct ifreq *ifcu_req;
+-      } ifc_ifcu;
+-  };
+ # define ifc_buf	ifc_ifcu.ifcu_buf	/* Buffer address.  */
+ # define ifc_req	ifc_ifcu.ifcu_req	/* Array of structures.  */
+ # define _IOT_ifconf _IOT(_IOTS(struct ifconf),1,0,0,0,0) /* not right */
diff -N -u xtables-addons.ori/PKGBUILD xtables-addons/PKGBUILD
--- xtables-addons.ori/PKGBUILD	2016-04-27 17:27:37.000000000 +0200
+++ xtables-addons/PKGBUILD	2016-05-15 15:04:33.426431964 +0200
@@ -19,6 +19,13 @@
 
 prepare() {
   pushd "${srcdir}/${pkgname}-${pkgver}"
+  [ ! -d "${srcdir}/${pkgname}-${pkgver}"/net ] && mkdir "${srcdir}/${pkgname}-${pkgver}"/net
+  rm -f "${srcdir}/${pkgname}-${pkgver}"/net/if.h
+  cp /usr/include/net/if.h "${srcdir}/${pkgname}-${pkgver}"/net/
+  patch "${srcdir}/${pkgname}-${pkgver}"/net/if.h "${srcdir}"/../if.h.diff
+  HERE=$(pwd)
+  "${srcdir}/${pkgname}-${pkgver}"/autogen.sh
+  patch "${srcdir}/${pkgname}-${pkgver}"/extensions/pknock/Makefile.am "${srcdir}"/../pknock_makefile.diff
   ./configure \
     --prefix=/usr \
     --sysconfdir=/etc \
diff -N -u xtables-addons.ori/pknock_makefile.diff xtables-addons/pknock_makefile.diff
--- xtables-addons.ori/pknock_makefile.diff	1970-01-01 01:00:00.000000000 +0100
+++ xtables-addons/pknock_makefile.diff	2016-05-15 14:52:25.000000000 +0200
@@ -0,0 +1,12 @@
+--- Makefile.am.ori	2016-05-15 14:51:47.000000000 +0200
++++ Makefile.am	2016-05-15 14:52:22.837922108 +0200
+@@ -1,7 +1,7 @@
+ # -*- Makefile -*-
+ 
+-AM_CPPFLAGS = ${regular_CPPFLAGS} -I${abs_top_srcdir}/extensions
+-AM_CFLAGS   = ${regular_CFLAGS} ${libxtables_CFLAGS}
++AM_CPPFLAGS = -I${abs_top_srcdir} ${regular_CPPFLAGS} -I${abs_top_srcdir}/extensions
++AM_CFLAGS   = -I${abs_top_srcdir} ${regular_CFLAGS} ${libxtables_CFLAGS}
+ 
+ include ../../Makefile.extra
+ 
