drivers/net/ethernet/sfc/filter.h - linux/kernel/git/viro/vfs - Git at Google

 /****************************************************************************
  * Driver for Solarflare network controllers and boards
  * Copyright 2005-2013 Solarflare Communications Inc.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 as published
  * by the Free Software Foundation, incorporated herein by reference.
  */

 #ifndef EFX_FILTER_H
 #define EFX_FILTER_H

 #include <linux/types.h>
 #include <linux/if_ether.h>
 #include <asm/byteorder.h>

 /**
  * enum efx_filter_match_flags - Flags for hardware filter match type
  * @EFX_FILTER_MATCH_REM_HOST: Match by remote IP host address
  * @EFX_FILTER_MATCH_LOC_HOST: Match by local IP host address
  * @EFX_FILTER_MATCH_REM_MAC: Match by remote MAC address
  * @EFX_FILTER_MATCH_REM_PORT: Match by remote TCP/UDP port
  * @EFX_FILTER_MATCH_LOC_MAC: Match by local MAC address
  * @EFX_FILTER_MATCH_LOC_PORT: Match by local TCP/UDP port
  * @EFX_FILTER_MATCH_ETHER_TYPE: Match by Ether-type
  * @EFX_FILTER_MATCH_INNER_VID: Match by inner VLAN ID
  * @EFX_FILTER_MATCH_OUTER_VID: Match by outer VLAN ID
  * @EFX_FILTER_MATCH_IP_PROTO: Match by IP transport protocol
  * @EFX_FILTER_MATCH_LOC_MAC_IG: Match by local MAC address I/G bit.
  *	Used for RX default unicast and multicast/broadcast filters.
  *
  * Only some combinations are supported, depending on NIC type:
  *
  * - Falcon supports RX filters matching by {TCP,UDP}/IPv4 4-tuple or
  *   local 2-tuple (only implemented for Falcon B0)
  *
  * - Siena supports RX and TX filters matching by {TCP,UDP}/IPv4 4-tuple
  *   or local 2-tuple, or local MAC with or without outer VID, and RX
  *   default filters
  *
  * - Huntington supports filter matching controlled by firmware, potentially
  *   using {TCP,UDP}/IPv{4,6} 4-tuple or local 2-tuple, local MAC or I/G bit,
  *   with or without outer and inner VID
  */
 enum efx_filter_match_flags {
 	EFX_FILTER_MATCH_REM_HOST =	0x0001,
 	EFX_FILTER_MATCH_LOC_HOST =	0x0002,
 	EFX_FILTER_MATCH_REM_MAC =	0x0004,
 	EFX_FILTER_MATCH_REM_PORT =	0x0008,
 	EFX_FILTER_MATCH_LOC_MAC =	0x0010,
 	EFX_FILTER_MATCH_LOC_PORT =	0x0020,
 	EFX_FILTER_MATCH_ETHER_TYPE =	0x0040,
 	EFX_FILTER_MATCH_INNER_VID =	0x0080,
 	EFX_FILTER_MATCH_OUTER_VID =	0x0100,
 	EFX_FILTER_MATCH_IP_PROTO =	0x0200,
 	EFX_FILTER_MATCH_LOC_MAC_IG =	0x0400,
 };

 /**
  * enum efx_filter_priority - priority of a hardware filter specification
  * @EFX_FILTER_PRI_HINT: Performance hint
  * @EFX_FILTER_PRI_MANUAL: Manually configured filter
  * @EFX_FILTER_PRI_REQUIRED: Required for correct behaviour (user-level
  *	networking and SR-IOV)
  */
 enum efx_filter_priority {
 	EFX_FILTER_PRI_HINT = 0,
 	EFX_FILTER_PRI_MANUAL,
 	EFX_FILTER_PRI_REQUIRED,
 };

 /**
  * enum efx_filter_flags - flags for hardware filter specifications
  * @EFX_FILTER_FLAG_RX_RSS: Use RSS to spread across multiple queues.
  *	By default, matching packets will be delivered only to the
  *	specified queue. If this flag is set, they will be delivered
  *	to a range of queues offset from the specified queue number
  *	according to the indirection table.
  * @EFX_FILTER_FLAG_RX_SCATTER: Enable DMA scatter on the receiving
  *	queue.
  * @EFX_FILTER_FLAG_RX_STACK: Indicates a filter inserted for the
  *	network stack.  The filter must have a priority of
  *	%EFX_FILTER_PRI_REQUIRED.  It can be steered by a replacement
  *	request with priority %EFX_FILTER_PRI_MANUAL, and a removal
  *	request with priority %EFX_FILTER_PRI_MANUAL will reset the
  *	steering (but not remove the filter).
  * @EFX_FILTER_FLAG_RX: Filter is for RX
  * @EFX_FILTER_FLAG_TX: Filter is for TX
  */
 enum efx_filter_flags {
 	EFX_FILTER_FLAG_RX_RSS = 0x01,
 	EFX_FILTER_FLAG_RX_SCATTER = 0x02,
 	EFX_FILTER_FLAG_RX_STACK = 0x04,
 	EFX_FILTER_FLAG_RX = 0x08,
 	EFX_FILTER_FLAG_TX = 0x10,
 };

 /**
  * struct efx_filter_spec - specification for a hardware filter
  * @match_flags: Match type flags, from &enum efx_filter_match_flags
  * @priority: Priority of the filter, from &enum efx_filter_priority
  * @flags: Miscellaneous flags, from &enum efx_filter_flags
  * @rss_context: RSS context to use, if %EFX_FILTER_FLAG_RX_RSS is set
  * @dmaq_id: Source/target queue index, or %EFX_FILTER_RX_DMAQ_ID_DROP for
  *	an RX drop filter
  * @outer_vid: Outer VLAN ID to match, if %EFX_FILTER_MATCH_OUTER_VID is set
  * @inner_vid: Inner VLAN ID to match, if %EFX_FILTER_MATCH_INNER_VID is set
  * @loc_mac: Local MAC address to match, if %EFX_FILTER_MATCH_LOC_MAC or
  *	%EFX_FILTER_MATCH_LOC_MAC_IG is set
  * @rem_mac: Remote MAC address to match, if %EFX_FILTER_MATCH_REM_MAC is set
  * @ether_type: Ether-type to match, if %EFX_FILTER_MATCH_ETHER_TYPE is set
  * @ip_proto: IP transport protocol to match, if %EFX_FILTER_MATCH_IP_PROTO
  *	is set
  * @loc_host: Local IP host to match, if %EFX_FILTER_MATCH_LOC_HOST is set
  * @rem_host: Remote IP host to match, if %EFX_FILTER_MATCH_REM_HOST is set
  * @loc_port: Local TCP/UDP port to match, if %EFX_FILTER_MATCH_LOC_PORT is set
  * @rem_port: Remote TCP/UDP port to match, if %EFX_FILTER_MATCH_REM_PORT is set
  *
  * The efx_filter_init_rx() or efx_filter_init_tx() function *must* be
  * used to initialise the structure.  The efx_filter_set_*() functions
  * may then be used to set @rss_context, @match_flags and related
  * fields.
  *
  * The @priority field is used by software to determine whether a new
  * filter may replace an old one.  The hardware priority of a filter
  * depends on which fields are matched.
  */
 struct efx_filter_spec {
 	u32	match_flags:12;
 	u32	priority:2;
 	u32	flags:6;
 	u32	dmaq_id:12;
 	u32	rss_context;
 	__be16	outer_vid __aligned(4); /* allow jhash2() of match values */
 	__be16	inner_vid;
 	u8	loc_mac[ETH_ALEN];
 	u8	rem_mac[ETH_ALEN];
 	__be16	ether_type;
 	u8	ip_proto;
 	__be32	loc_host[4];
 	__be32	rem_host[4];
 	__be16	loc_port;
 	__be16	rem_port;
 	/* total 64 bytes */
 };

 enum {
 	EFX_FILTER_RSS_CONTEXT_DEFAULT = 0xffffffff,
 	EFX_FILTER_RX_DMAQ_ID_DROP = 0xfff
 };

 static inline void efx_filter_init_rx(struct efx_filter_spec *spec,
 				      enum efx_filter_priority priority,
 				      enum efx_filter_flags flags,
 				      unsigned rxq_id)
 {
 	memset(spec, 0, sizeof(*spec));
 	spec->priority = priority;
 	spec->flags = EFX_FILTER_FLAG_RX | flags;
 	spec->rss_context = EFX_FILTER_RSS_CONTEXT_DEFAULT;
 	spec->dmaq_id = rxq_id;
 }

 static inline void efx_filter_init_tx(struct efx_filter_spec *spec,
 				      unsigned txq_id)
 {
 	memset(spec, 0, sizeof(*spec));
 	spec->priority = EFX_FILTER_PRI_REQUIRED;
 	spec->flags = EFX_FILTER_FLAG_TX;
 	spec->dmaq_id = txq_id;
 }

 /**
  * efx_filter_set_ipv4_local - specify IPv4 host, transport protocol and port
  * @spec: Specification to initialise
  * @proto: Transport layer protocol number
  * @host: Local host address (network byte order)
  * @port: Local port (network byte order)
  */
 static inline int
 efx_filter_set_ipv4_local(struct efx_filter_spec *spec, u8 proto,
 			  __be32 host, __be16 port)
 {
 	spec->match_flags |=
 		EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_IP_PROTO |
 		EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_LOC_PORT;
 	spec->ether_type = htons(ETH_P_IP);
 	spec->ip_proto = proto;
 	spec->loc_host[0] = host;
 	spec->loc_port = port;
 	return 0;
 }

 /**
  * efx_filter_set_ipv4_full - specify IPv4 hosts, transport protocol and ports
  * @spec: Specification to initialise
  * @proto: Transport layer protocol number
  * @lhost: Local host address (network byte order)
  * @lport: Local port (network byte order)
  * @rhost: Remote host address (network byte order)
  * @rport: Remote port (network byte order)
  */
 static inline int
 efx_filter_set_ipv4_full(struct efx_filter_spec *spec, u8 proto,
 			 __be32 lhost, __be16 lport,
 			 __be32 rhost, __be16 rport)
 {
 	spec->match_flags |=
 		EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_IP_PROTO |
 		EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_LOC_PORT |
 		EFX_FILTER_MATCH_REM_HOST | EFX_FILTER_MATCH_REM_PORT;
 	spec->ether_type = htons(ETH_P_IP);
 	spec->ip_proto = proto;
 	spec->loc_host[0] = lhost;
 	spec->loc_port = lport;
 	spec->rem_host[0] = rhost;
 	spec->rem_port = rport;
 	return 0;
 }

 enum {
 	EFX_FILTER_VID_UNSPEC = 0xffff,
 };

 /**
  * efx_filter_set_eth_local - specify local Ethernet address and/or VID
  * @spec: Specification to initialise
  * @vid: Outer VLAN ID to match, or %EFX_FILTER_VID_UNSPEC
  * @addr: Local Ethernet MAC address, or %NULL
  */
 static inline int efx_filter_set_eth_local(struct efx_filter_spec *spec,
 					   u16 vid, const u8 *addr)
 {
 	if (vid == EFX_FILTER_VID_UNSPEC && addr == NULL)
 		return -EINVAL;

 	if (vid != EFX_FILTER_VID_UNSPEC) {
 		spec->match_flags |= EFX_FILTER_MATCH_OUTER_VID;
 		spec->outer_vid = htons(vid);
 	}
 	if (addr != NULL) {
 		spec->match_flags |= EFX_FILTER_MATCH_LOC_MAC;
 		memcpy(spec->loc_mac, addr, ETH_ALEN);
 	}
 	return 0;
 }

 /**
  * efx_filter_set_uc_def - specify matching otherwise-unmatched unicast
  * @spec: Specification to initialise
  */
 static inline int efx_filter_set_uc_def(struct efx_filter_spec *spec)
 {
 	spec->match_flags |= EFX_FILTER_MATCH_LOC_MAC_IG;
 	return 0;
 }

 /**
  * efx_filter_set_mc_def - specify matching otherwise-unmatched multicast
  * @spec: Specification to initialise
  */
 static inline int efx_filter_set_mc_def(struct efx_filter_spec *spec)
 {
 	spec->match_flags |= EFX_FILTER_MATCH_LOC_MAC_IG;
 	spec->loc_mac[0] = 1;
 	return 0;
 }

 #endif /* EFX_FILTER_H */
	/****************************************************************************
	* Driver for Solarflare network controllers and boards
	* Copyright 2005-2013 Solarflare Communications Inc.
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 as published
	* by the Free Software Foundation, incorporated herein by reference.
	*/

	#ifndef EFX_FILTER_H
	#define EFX_FILTER_H

	#include <linux/types.h>
	#include <linux/if_ether.h>
	#include <asm/byteorder.h>

	/**
	* enum efx_filter_match_flags - Flags for hardware filter match type
	* @EFX_FILTER_MATCH_REM_HOST: Match by remote IP host address
	* @EFX_FILTER_MATCH_LOC_HOST: Match by local IP host address
	* @EFX_FILTER_MATCH_REM_MAC: Match by remote MAC address
	* @EFX_FILTER_MATCH_REM_PORT: Match by remote TCP/UDP port
	* @EFX_FILTER_MATCH_LOC_MAC: Match by local MAC address
	* @EFX_FILTER_MATCH_LOC_PORT: Match by local TCP/UDP port
	* @EFX_FILTER_MATCH_ETHER_TYPE: Match by Ether-type
	* @EFX_FILTER_MATCH_INNER_VID: Match by inner VLAN ID
	* @EFX_FILTER_MATCH_OUTER_VID: Match by outer VLAN ID
	* @EFX_FILTER_MATCH_IP_PROTO: Match by IP transport protocol
	* @EFX_FILTER_MATCH_LOC_MAC_IG: Match by local MAC address I/G bit.
	* Used for RX default unicast and multicast/broadcast filters.
	*
	* Only some combinations are supported, depending on NIC type:
	*
	* - Falcon supports RX filters matching by {TCP,UDP}/IPv4 4-tuple or
	* local 2-tuple (only implemented for Falcon B0)
	*
	* - Siena supports RX and TX filters matching by {TCP,UDP}/IPv4 4-tuple
	* or local 2-tuple, or local MAC with or without outer VID, and RX
	* default filters
	*
	* - Huntington supports filter matching controlled by firmware, potentially
	* using {TCP,UDP}/IPv{4,6} 4-tuple or local 2-tuple, local MAC or I/G bit,
	* with or without outer and inner VID
	*/
	enum efx_filter_match_flags {
	EFX_FILTER_MATCH_REM_HOST = 0x0001,
	EFX_FILTER_MATCH_LOC_HOST = 0x0002,
	EFX_FILTER_MATCH_REM_MAC = 0x0004,
	EFX_FILTER_MATCH_REM_PORT = 0x0008,
	EFX_FILTER_MATCH_LOC_MAC = 0x0010,
	EFX_FILTER_MATCH_LOC_PORT = 0x0020,
	EFX_FILTER_MATCH_ETHER_TYPE = 0x0040,
	EFX_FILTER_MATCH_INNER_VID = 0x0080,
	EFX_FILTER_MATCH_OUTER_VID = 0x0100,
	EFX_FILTER_MATCH_IP_PROTO = 0x0200,
	EFX_FILTER_MATCH_LOC_MAC_IG = 0x0400,
	};

	/**
	* enum efx_filter_priority - priority of a hardware filter specification
	* @EFX_FILTER_PRI_HINT: Performance hint
	* @EFX_FILTER_PRI_MANUAL: Manually configured filter
	* @EFX_FILTER_PRI_REQUIRED: Required for correct behaviour (user-level
	* networking and SR-IOV)
	*/
	enum efx_filter_priority {
	EFX_FILTER_PRI_HINT = 0,
	EFX_FILTER_PRI_MANUAL,
	EFX_FILTER_PRI_REQUIRED,
	};

	/**
	* enum efx_filter_flags - flags for hardware filter specifications
	* @EFX_FILTER_FLAG_RX_RSS: Use RSS to spread across multiple queues.
	* By default, matching packets will be delivered only to the
	* specified queue. If this flag is set, they will be delivered
	* to a range of queues offset from the specified queue number
	* according to the indirection table.
	* @EFX_FILTER_FLAG_RX_SCATTER: Enable DMA scatter on the receiving
	* queue.
	* @EFX_FILTER_FLAG_RX_STACK: Indicates a filter inserted for the
	* network stack. The filter must have a priority of
	* %EFX_FILTER_PRI_REQUIRED. It can be steered by a replacement
	* request with priority %EFX_FILTER_PRI_MANUAL, and a removal
	* request with priority %EFX_FILTER_PRI_MANUAL will reset the
	* steering (but not remove the filter).
	* @EFX_FILTER_FLAG_RX: Filter is for RX
	* @EFX_FILTER_FLAG_TX: Filter is for TX
	*/
	enum efx_filter_flags {
	EFX_FILTER_FLAG_RX_RSS = 0x01,
	EFX_FILTER_FLAG_RX_SCATTER = 0x02,
	EFX_FILTER_FLAG_RX_STACK = 0x04,
	EFX_FILTER_FLAG_RX = 0x08,
	EFX_FILTER_FLAG_TX = 0x10,
	};

	/**
	* struct efx_filter_spec - specification for a hardware filter
	* @match_flags: Match type flags, from &enum efx_filter_match_flags
	* @priority: Priority of the filter, from &enum efx_filter_priority
	* @flags: Miscellaneous flags, from &enum efx_filter_flags
	* @rss_context: RSS context to use, if %EFX_FILTER_FLAG_RX_RSS is set
	* @dmaq_id: Source/target queue index, or %EFX_FILTER_RX_DMAQ_ID_DROP for
	* an RX drop filter
	* @outer_vid: Outer VLAN ID to match, if %EFX_FILTER_MATCH_OUTER_VID is set
	* @inner_vid: Inner VLAN ID to match, if %EFX_FILTER_MATCH_INNER_VID is set
	* @loc_mac: Local MAC address to match, if %EFX_FILTER_MATCH_LOC_MAC or
	* %EFX_FILTER_MATCH_LOC_MAC_IG is set
	* @rem_mac: Remote MAC address to match, if %EFX_FILTER_MATCH_REM_MAC is set
	* @ether_type: Ether-type to match, if %EFX_FILTER_MATCH_ETHER_TYPE is set
	* @ip_proto: IP transport protocol to match, if %EFX_FILTER_MATCH_IP_PROTO
	* is set
	* @loc_host: Local IP host to match, if %EFX_FILTER_MATCH_LOC_HOST is set
	* @rem_host: Remote IP host to match, if %EFX_FILTER_MATCH_REM_HOST is set
	* @loc_port: Local TCP/UDP port to match, if %EFX_FILTER_MATCH_LOC_PORT is set
	* @rem_port: Remote TCP/UDP port to match, if %EFX_FILTER_MATCH_REM_PORT is set
	*
	* The efx_filter_init_rx() or efx_filter_init_tx() function must be
	* used to initialise the structure. The efx_filter_set_*() functions
	* may then be used to set @rss_context, @match_flags and related
	* fields.
	*
	* The @priority field is used by software to determine whether a new
	* filter may replace an old one. The hardware priority of a filter
	* depends on which fields are matched.
	*/
	struct efx_filter_spec {
	u32 match_flags:12;
	u32 priority:2;
	u32 flags:6;
	u32 dmaq_id:12;
	u32 rss_context;
	__be16 outer_vid __aligned(4); /* allow jhash2() of match values */
	__be16 inner_vid;
	u8 loc_mac[ETH_ALEN];
	u8 rem_mac[ETH_ALEN];
	__be16 ether_type;
	u8 ip_proto;
	__be32 loc_host[4];
	__be32 rem_host[4];
	__be16 loc_port;
	__be16 rem_port;
	/* total 64 bytes */
	};

	enum {
	EFX_FILTER_RSS_CONTEXT_DEFAULT = 0xffffffff,
	EFX_FILTER_RX_DMAQ_ID_DROP = 0xfff
	};

	static inline void efx_filter_init_rx(struct efx_filter_spec *spec,
	enum efx_filter_priority priority,
	enum efx_filter_flags flags,
	unsigned rxq_id)
	{
	memset(spec, 0, sizeof(*spec));
	spec->priority = priority;
	spec->flags = EFX_FILTER_FLAG_RX \| flags;
	spec->rss_context = EFX_FILTER_RSS_CONTEXT_DEFAULT;
	spec->dmaq_id = rxq_id;
	}

	static inline void efx_filter_init_tx(struct efx_filter_spec *spec,
	unsigned txq_id)
	{
	memset(spec, 0, sizeof(*spec));
	spec->priority = EFX_FILTER_PRI_REQUIRED;
	spec->flags = EFX_FILTER_FLAG_TX;
	spec->dmaq_id = txq_id;
	}

	/**
	* efx_filter_set_ipv4_local - specify IPv4 host, transport protocol and port
	* @spec: Specification to initialise
	* @proto: Transport layer protocol number
	* @host: Local host address (network byte order)
	* @port: Local port (network byte order)
	*/
	static inline int
	efx_filter_set_ipv4_local(struct efx_filter_spec *spec, u8 proto,
	__be32 host, __be16 port)
	{
	spec->match_flags \|=
	EFX_FILTER_MATCH_ETHER_TYPE \| EFX_FILTER_MATCH_IP_PROTO \|
	EFX_FILTER_MATCH_LOC_HOST \| EFX_FILTER_MATCH_LOC_PORT;
	spec->ether_type = htons(ETH_P_IP);
	spec->ip_proto = proto;
	spec->loc_host[0] = host;
	spec->loc_port = port;
	return 0;
	}

	/**
	* efx_filter_set_ipv4_full - specify IPv4 hosts, transport protocol and ports
	* @spec: Specification to initialise
	* @proto: Transport layer protocol number
	* @lhost: Local host address (network byte order)
	* @lport: Local port (network byte order)
	* @rhost: Remote host address (network byte order)
	* @rport: Remote port (network byte order)
	*/
	static inline int
	efx_filter_set_ipv4_full(struct efx_filter_spec *spec, u8 proto,
	__be32 lhost, __be16 lport,
	__be32 rhost, __be16 rport)
	{
	spec->match_flags \|=
	EFX_FILTER_MATCH_ETHER_TYPE \| EFX_FILTER_MATCH_IP_PROTO \|
	EFX_FILTER_MATCH_LOC_HOST \| EFX_FILTER_MATCH_LOC_PORT \|
	EFX_FILTER_MATCH_REM_HOST \| EFX_FILTER_MATCH_REM_PORT;
	spec->ether_type = htons(ETH_P_IP);
	spec->ip_proto = proto;
	spec->loc_host[0] = lhost;
	spec->loc_port = lport;
	spec->rem_host[0] = rhost;
	spec->rem_port = rport;
	return 0;
	}

	enum {
	EFX_FILTER_VID_UNSPEC = 0xffff,
	};

	/**
	* efx_filter_set_eth_local - specify local Ethernet address and/or VID
	* @spec: Specification to initialise
	* @vid: Outer VLAN ID to match, or %EFX_FILTER_VID_UNSPEC
	* @addr: Local Ethernet MAC address, or %NULL
	*/
	static inline int efx_filter_set_eth_local(struct efx_filter_spec *spec,
	u16 vid, const u8 *addr)
	{
	if (vid == EFX_FILTER_VID_UNSPEC && addr == NULL)
	return -EINVAL;

	if (vid != EFX_FILTER_VID_UNSPEC) {
	spec->match_flags \|= EFX_FILTER_MATCH_OUTER_VID;
	spec->outer_vid = htons(vid);
	}
	if (addr != NULL) {
	spec->match_flags \|= EFX_FILTER_MATCH_LOC_MAC;
	memcpy(spec->loc_mac, addr, ETH_ALEN);
	}
	return 0;
	}

	/**
	* efx_filter_set_uc_def - specify matching otherwise-unmatched unicast
	* @spec: Specification to initialise
	*/
	static inline int efx_filter_set_uc_def(struct efx_filter_spec *spec)
	{
	spec->match_flags \|= EFX_FILTER_MATCH_LOC_MAC_IG;
	return 0;
	}

	/**
	* efx_filter_set_mc_def - specify matching otherwise-unmatched multicast
	* @spec: Specification to initialise
	*/
	static inline int efx_filter_set_mc_def(struct efx_filter_spec *spec)
	{
	spec->match_flags \|= EFX_FILTER_MATCH_LOC_MAC_IG;
	spec->loc_mac[0] = 1;
	return 0;
	}

	#endif /* EFX_FILTER_H */