src/vnet/fib/fib_source.h - fdio/vpp - Gitiles

 /*
  * Copyright (c) 2016 Cisco and/or its affiliates.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #ifndef __FIB_SOURCE_H__
 #define __FIB_SOURCE_H__

 #include <vnet/vnet.h>

 /**
  * The different sources that can create a route.
  *
  * A source is a combination of two concepts; priority and behaviour.
  * Priority determines whether the source is contributing forwarding.
  * Behaviour determines how FIB entries with this source interact with
  * other elements of FIB.
  */
 typedef enum fib_source_t_ {
     /**
      * An invalid source
      * This is not a real source, so don't use it to source a prefix.
      * It exists here to provide a value for inexistant/uninitialized source
      */
     FIB_SOURCE_INVALID = 0,
     /**
      * Marker. Add new values after this one.
      */
     FIB_SOURCE_FIRST,
     /**
      * Special sources. These are for entries that are added to all
      * FIBs by default, and should never be over-ridden (hence they
      * are the highest priority)
      */
     FIB_SOURCE_SPECIAL = FIB_SOURCE_FIRST,
     /**
      * Classify. A route that links directly to a classify adj
      */
     FIB_SOURCE_CLASSIFY,
     /**
      * A route the is being 'proxied' on behalf of another device
      */
     FIB_SOURCE_PROXY,
     /**
      * Route added as a result of interface configuration.
      * this will also come from the API/CLI, but the distinction is
      * that is from confiiguration on an interface, not a 'ip route' command
      */
     FIB_SOURCE_INTERFACE,
     /**
      * SRv6 and SR-MPLS
      */
     FIB_SOURCE_SR,
     /**
      * From the BIER subsystem
      */
     FIB_SOURCE_BIER,
     /**
      * From 6RD.
      */
     FIB_SOURCE_6RD,
     /**
      * From the control plane API
      */
     FIB_SOURCE_API,
     /**
      * From the CLI.
      */
     FIB_SOURCE_CLI,
     /**
      * LISP
      */
     FIB_SOURCE_LISP,
     /**
      * IPv[46] Mapping
      */
     FIB_SOURCE_MAP,
     /**
      * DHCP
      */
     FIB_SOURCE_DHCP,
     /**
      * IPv6 Proxy ND
      */
     FIB_SOURCE_IP6_ND_PROXY,
     /**
      * IPv6 ND (seen in the link-local tables)
      */
     FIB_SOURCE_IP6_ND,
     /**
      * Adjacency source.
      * routes created as a result of ARP/ND entries. This is lower priority
      * then the API/CLI. This is on purpose. trust me.
      */
     FIB_SOURCE_ADJ,
     /**
      * MPLS label. The prefix has been assigned a local label. This source
      * never provides forwarding information, instead it acts as a place-holder
      * so the association of label to prefix can be maintained
      */
     FIB_SOURCE_MPLS,
     /**
      * Attached Export source.
      * routes created as a result of attahced export. routes thus sourced
      * will be present in the export tables
      */
     FIB_SOURCE_AE,
     /**
      * Recursive resolution source.
      * Used to install an entry that is the resolution traget of another.
      */
     FIB_SOURCE_RR,
     /**
      * uRPF bypass/exemption.
      * Used to install an entry that is exempt from the loose uRPF check
      */
     FIB_SOURCE_URPF_EXEMPT,
     /**
      * The default route source.
      * The default route is always added to the FIB table (like the
      * special sources) but we need to be able to over-ride it with
      * 'ip route' sources when provided
      */
     FIB_SOURCE_DEFAULT_ROUTE,
     /**
      * The interpose source.
      * This is not a real source, so don't use it to source a prefix.
      * It exists here to provide a value against which to register to the
      * VFT for providing the interpose actions to a real source.
      */
     FIB_SOURCE_INTERPOSE,
     /**
      * Marker. add new entries before this one.
      */
     FIB_SOURCE_LAST = FIB_SOURCE_INTERPOSE,
 } __attribute__ ((packed)) fib_source_t;

 STATIC_ASSERT (sizeof(fib_source_t) == 1,
 	       "FIB too many sources");

 #define FIB_SOURCES {					\
     [FIB_SOURCE_INVALID] = "invalid",			\
     [FIB_SOURCE_SPECIAL] = "special",			\
     [FIB_SOURCE_INTERFACE] = "interface",		\
     [FIB_SOURCE_PROXY] = "proxy",                       \
     [FIB_SOURCE_BIER] = "BIER",			        \
     [FIB_SOURCE_6RD] = "6RD",			        \
     [FIB_SOURCE_API] = "API",			        \
     [FIB_SOURCE_CLI] = "CLI",			        \
     [FIB_SOURCE_ADJ] = "adjacency",			\
     [FIB_SOURCE_MAP] = "MAP",			        \
     [FIB_SOURCE_SR] = "SR",			        \
     [FIB_SOURCE_LISP] = "LISP", 			\
     [FIB_SOURCE_CLASSIFY] = "classify",			\
     [FIB_SOURCE_DHCP] = "DHCP",   			\
     [FIB_SOURCE_IP6_ND_PROXY] = "IPv6-proxy-nd",        \
     [FIB_SOURCE_IP6_ND] = "IPv6-nd",                    \
     [FIB_SOURCE_RR] = "recursive-resolution",	        \
     [FIB_SOURCE_AE] = "attached_export",	        \
     [FIB_SOURCE_MPLS] = "mpls",           	        \
     [FIB_SOURCE_URPF_EXEMPT] = "urpf-exempt",	        \
     [FIB_SOURCE_DEFAULT_ROUTE] = "default-route",	\
     [FIB_SOURCE_INTERPOSE] = "interpose",               \
 }

 /**
  * Each source is assigned a priority. lower priority is better.
  * the source with the best source with have its contribution added
  * to forwarding. the lesser sources will be 'remembered' by FIB and
  * added to forwarding should the best source be removed.
  */
 typedef u8 fib_source_priority_t;

 /**
  * source comparison
  */
 typedef enum fib_source_priority_cmp_t_
 {
     FIB_SOURCE_CMP_BETTER,
     FIB_SOURCE_CMP_WORSE,
     FIB_SOURCE_CMP_EQUAL,
 } fib_source_priority_cmp_t;

 /**
  * Each source has a defined behaviour that controls how entries
  * behave that have that source.
  * Sources with non-default behaviour may have a private data area
  * in the fib_entry_src_t union.
  */
 typedef enum fib_source_behaviour_t_
 {
     /**
      * If you're adding a new source from a plugin pick one of these
      */
     /** Default behaviour - always install a drop */
     FIB_SOURCE_BH_DROP,
     /** add paths with [mpls] path extensions */
     FIB_SOURCE_BH_API,
     /** add paths without path extensions */
     FIB_SOURCE_BH_SIMPLE,

     /**
      * If your adding a new source from a plugin
      * these are probably not the behaviour you're lokking for.
      */
     /** recursive resolution w/ cover tracking*/
     FIB_SOURCE_BH_RR,
     /** associated label stored in private data */
     FIB_SOURCE_BH_MPLS,
     /** cover tracking w/ glean management */
     FIB_SOURCE_BH_INTERFACE,
     /** interpose */
     FIB_SOURCE_BH_INTERPOSE,
     /**
      * simple behaviour, plus the source specific data stores the
      * FIB index that is used for subsequent lookups using the
      * packet's source address.
      * This doesn't need to be a LISP specific source, it's just
      * 'simple' behaviour with a u32 stored in the source specific data.
      */
     FIB_SOURCE_BH_LISP,
     /** adj w/ cover tracking + refinement */
     FIB_SOURCE_BH_ADJ,
 } fib_source_behaviour_t;

 #define FIB_SOURCE_BH_MAX (FIB_SOURCE_BH_ADJ+1)

 #define FIB_SOURCE_BEHAVIOURS {                 \
     [FIB_SOURCE_BH_DROP] = "drop",		\
     [FIB_SOURCE_BH_RR] = "rr",                  \
     [FIB_SOURCE_BH_MPLS] = "mpls",              \
     [FIB_SOURCE_BH_INTERFACE] = "interface",    \
     [FIB_SOURCE_BH_INTERPOSE] = "interpose",    \
     [FIB_SOURCE_BH_LISP] = "lisp",              \
     [FIB_SOURCE_BH_ADJ] = "adjacency",          \
     [FIB_SOURCE_BH_API] = "api",                \
     [FIB_SOURCE_BH_SIMPLE] = "simple",          \
 }

 /**
  * The fixed source to priority mappings.
  * Declared here so those adding new sources can better determine their respective
  * priority values.
  */
 #define foreach_fib_source                                      \
     /** you can't do better then the special source */         \
     _(FIB_SOURCE_SPECIAL,       0x00, FIB_SOURCE_BH_SIMPLE)    \
     _(FIB_SOURCE_CLASSIFY,      0x01, FIB_SOURCE_BH_SIMPLE)    \
     _(FIB_SOURCE_PROXY,         0x02, FIB_SOURCE_BH_SIMPLE)    \
     _(FIB_SOURCE_INTERFACE,     0x03, FIB_SOURCE_BH_INTERFACE) \
     _(FIB_SOURCE_SR,            0x10, FIB_SOURCE_BH_API)       \
     _(FIB_SOURCE_BIER,          0x20, FIB_SOURCE_BH_SIMPLE)    \
     _(FIB_SOURCE_6RD,           0x30, FIB_SOURCE_BH_API)       \
     _(FIB_SOURCE_API,           0x80, FIB_SOURCE_BH_API)       \
     _(FIB_SOURCE_CLI,           0x81, FIB_SOURCE_BH_API)       \
     _(FIB_SOURCE_LISP,          0x90, FIB_SOURCE_BH_LISP)      \
     _(FIB_SOURCE_MAP,           0xa0, FIB_SOURCE_BH_SIMPLE)    \
     _(FIB_SOURCE_DHCP,          0xb0, FIB_SOURCE_BH_API)       \
     _(FIB_SOURCE_IP6_ND_PROXY,  0xc0, FIB_SOURCE_BH_API)       \
     _(FIB_SOURCE_IP6_ND,        0xc1, FIB_SOURCE_BH_API)       \
     _(FIB_SOURCE_ADJ,           0xd0, FIB_SOURCE_BH_ADJ)       \
     _(FIB_SOURCE_MPLS,          0xe0, FIB_SOURCE_BH_MPLS)      \
     _(FIB_SOURCE_AE,            0xf0, FIB_SOURCE_BH_SIMPLE)    \
     _(FIB_SOURCE_RR,            0xfb, FIB_SOURCE_BH_RR)        \
     _(FIB_SOURCE_URPF_EXEMPT,   0xfc, FIB_SOURCE_BH_RR)        \
     _(FIB_SOURCE_DEFAULT_ROUTE, 0xfd, FIB_SOURCE_BH_DROP)      \
     _(FIB_SOURCE_INTERPOSE,     0xfe, FIB_SOURCE_BH_INTERPOSE) \
     _(FIB_SOURCE_INVALID,       0xff, FIB_SOURCE_BH_DROP)

 /**
  * Some priority values that plugins might use when they are not to concerned
  * where in the list they'll go.
  */
 #define FIB_SOURCE_PRIORITY_HI 0x10
 #define FIB_SOURCE_PRIORITY_LOW 0xd0


 extern u16 fib_source_get_prio(fib_source_t src);
 extern fib_source_behaviour_t fib_source_get_behaviour(fib_source_t src);
 extern fib_source_priority_cmp_t fib_source_cmp(fib_source_t s1,
                                                 fib_source_t s2);

 extern u8 *format_fib_source(u8 *s, va_list *a);

 extern fib_source_t fib_source_allocate(const char *name,
                                         fib_source_priority_t prio,
                                         fib_source_behaviour_t bh);

 extern void fib_source_register(fib_source_t src,
                                 fib_source_priority_t prio,
                                 fib_source_behaviour_t bh);

 typedef walk_rc_t (*fib_source_walk_t)(fib_source_t id,
                                        const char *name,
                                        fib_source_priority_t prio,
                                        fib_source_behaviour_t bh,
                                        void *ctx);
 extern void fib_source_walk(fib_source_walk_t fn,
                             void *ctx);

 extern void fib_source_module_init(void);

 #endif
	/*
	* Copyright (c) 2016 Cisco and/or its affiliates.
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at:
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#ifndef __FIB_SOURCE_H__
	#define __FIB_SOURCE_H__

	#include <vnet/vnet.h>

	/**
	* The different sources that can create a route.
	*
	* A source is a combination of two concepts; priority and behaviour.
	* Priority determines whether the source is contributing forwarding.
	* Behaviour determines how FIB entries with this source interact with
	* other elements of FIB.
	*/
	typedef enum fib_source_t_ {
	/**
	* An invalid source
	* This is not a real source, so don't use it to source a prefix.
	* It exists here to provide a value for inexistant/uninitialized source
	*/
	FIB_SOURCE_INVALID = 0,
	/**
	* Marker. Add new values after this one.
	*/
	FIB_SOURCE_FIRST,
	/**
	* Special sources. These are for entries that are added to all
	* FIBs by default, and should never be over-ridden (hence they
	* are the highest priority)
	*/
	FIB_SOURCE_SPECIAL = FIB_SOURCE_FIRST,
	/**
	* Classify. A route that links directly to a classify adj
	*/
	FIB_SOURCE_CLASSIFY,
	/**
	* A route the is being 'proxied' on behalf of another device
	*/
	FIB_SOURCE_PROXY,
	/**
	* Route added as a result of interface configuration.
	* this will also come from the API/CLI, but the distinction is
	* that is from confiiguration on an interface, not a 'ip route' command
	*/
	FIB_SOURCE_INTERFACE,
	/**
	* SRv6 and SR-MPLS
	*/
	FIB_SOURCE_SR,
	/**
	* From the BIER subsystem
	*/
	FIB_SOURCE_BIER,
	/**
	* From 6RD.
	*/
	FIB_SOURCE_6RD,
	/**
	* From the control plane API
	*/
	FIB_SOURCE_API,
	/**
	* From the CLI.
	*/
	FIB_SOURCE_CLI,
	/**
	* LISP
	*/
	FIB_SOURCE_LISP,
	/**
	* IPv[46] Mapping
	*/
	FIB_SOURCE_MAP,
	/**
	* DHCP
	*/
	FIB_SOURCE_DHCP,
	/**
	* IPv6 Proxy ND
	*/
	FIB_SOURCE_IP6_ND_PROXY,
	/**
	* IPv6 ND (seen in the link-local tables)
	*/
	FIB_SOURCE_IP6_ND,
	/**
	* Adjacency source.
	* routes created as a result of ARP/ND entries. This is lower priority
	* then the API/CLI. This is on purpose. trust me.
	*/
	FIB_SOURCE_ADJ,
	/**
	* MPLS label. The prefix has been assigned a local label. This source
	* never provides forwarding information, instead it acts as a place-holder
	* so the association of label to prefix can be maintained
	*/
	FIB_SOURCE_MPLS,
	/**
	* Attached Export source.
	* routes created as a result of attahced export. routes thus sourced
	* will be present in the export tables
	*/
	FIB_SOURCE_AE,
	/**
	* Recursive resolution source.
	* Used to install an entry that is the resolution traget of another.
	*/
	FIB_SOURCE_RR,
	/**
	* uRPF bypass/exemption.
	* Used to install an entry that is exempt from the loose uRPF check
	*/
	FIB_SOURCE_URPF_EXEMPT,
	/**
	* The default route source.
	* The default route is always added to the FIB table (like the
	* special sources) but we need to be able to over-ride it with
	* 'ip route' sources when provided
	*/
	FIB_SOURCE_DEFAULT_ROUTE,
	/**
	* The interpose source.
	* This is not a real source, so don't use it to source a prefix.
	* It exists here to provide a value against which to register to the
	* VFT for providing the interpose actions to a real source.
	*/
	FIB_SOURCE_INTERPOSE,
	/**
	* Marker. add new entries before this one.
	*/
	FIB_SOURCE_LAST = FIB_SOURCE_INTERPOSE,
	} __attribute__ ((packed)) fib_source_t;

	STATIC_ASSERT (sizeof(fib_source_t) == 1,
	"FIB too many sources");

	#define FIB_SOURCES { \
	[FIB_SOURCE_INVALID] = "invalid", \
	[FIB_SOURCE_SPECIAL] = "special", \
	[FIB_SOURCE_INTERFACE] = "interface", \
	[FIB_SOURCE_PROXY] = "proxy", \
	[FIB_SOURCE_BIER] = "BIER", \
	[FIB_SOURCE_6RD] = "6RD", \
	[FIB_SOURCE_API] = "API", \
	[FIB_SOURCE_CLI] = "CLI", \
	[FIB_SOURCE_ADJ] = "adjacency", \
	[FIB_SOURCE_MAP] = "MAP", \
	[FIB_SOURCE_SR] = "SR", \
	[FIB_SOURCE_LISP] = "LISP", \
	[FIB_SOURCE_CLASSIFY] = "classify", \
	[FIB_SOURCE_DHCP] = "DHCP", \
	[FIB_SOURCE_IP6_ND_PROXY] = "IPv6-proxy-nd", \
	[FIB_SOURCE_IP6_ND] = "IPv6-nd", \
	[FIB_SOURCE_RR] = "recursive-resolution", \
	[FIB_SOURCE_AE] = "attached_export", \
	[FIB_SOURCE_MPLS] = "mpls", \
	[FIB_SOURCE_URPF_EXEMPT] = "urpf-exempt", \
	[FIB_SOURCE_DEFAULT_ROUTE] = "default-route", \
	[FIB_SOURCE_INTERPOSE] = "interpose", \
	}

	/**
	* Each source is assigned a priority. lower priority is better.
	* the source with the best source with have its contribution added
	* to forwarding. the lesser sources will be 'remembered' by FIB and
	* added to forwarding should the best source be removed.
	*/
	typedef u8 fib_source_priority_t;

	/**
	* source comparison
	*/
	typedef enum fib_source_priority_cmp_t_
	{
	FIB_SOURCE_CMP_BETTER,
	FIB_SOURCE_CMP_WORSE,
	FIB_SOURCE_CMP_EQUAL,
	} fib_source_priority_cmp_t;

	/**
	* Each source has a defined behaviour that controls how entries
	* behave that have that source.
	* Sources with non-default behaviour may have a private data area
	* in the fib_entry_src_t union.
	*/
	typedef enum fib_source_behaviour_t_
	{
	/**
	* If you're adding a new source from a plugin pick one of these
	*/
	/** Default behaviour - always install a drop */
	FIB_SOURCE_BH_DROP,
	/** add paths with [mpls] path extensions */
	FIB_SOURCE_BH_API,
	/** add paths without path extensions */
	FIB_SOURCE_BH_SIMPLE,

	/**
	* If your adding a new source from a plugin
	* these are probably not the behaviour you're lokking for.
	*/
	/** recursive resolution w/ cover tracking*/
	FIB_SOURCE_BH_RR,
	/** associated label stored in private data */
	FIB_SOURCE_BH_MPLS,
	/** cover tracking w/ glean management */
	FIB_SOURCE_BH_INTERFACE,
	/** interpose */
	FIB_SOURCE_BH_INTERPOSE,
	/**
	* simple behaviour, plus the source specific data stores the
	* FIB index that is used for subsequent lookups using the
	* packet's source address.
	* This doesn't need to be a LISP specific source, it's just
	* 'simple' behaviour with a u32 stored in the source specific data.
	*/
	FIB_SOURCE_BH_LISP,
	/** adj w/ cover tracking + refinement */
	FIB_SOURCE_BH_ADJ,
	} fib_source_behaviour_t;

	#define FIB_SOURCE_BH_MAX (FIB_SOURCE_BH_ADJ+1)

	#define FIB_SOURCE_BEHAVIOURS { \
	[FIB_SOURCE_BH_DROP] = "drop", \
	[FIB_SOURCE_BH_RR] = "rr", \
	[FIB_SOURCE_BH_MPLS] = "mpls", \
	[FIB_SOURCE_BH_INTERFACE] = "interface", \
	[FIB_SOURCE_BH_INTERPOSE] = "interpose", \
	[FIB_SOURCE_BH_LISP] = "lisp", \
	[FIB_SOURCE_BH_ADJ] = "adjacency", \
	[FIB_SOURCE_BH_API] = "api", \
	[FIB_SOURCE_BH_SIMPLE] = "simple", \
	}

	/**
	* The fixed source to priority mappings.
	* Declared here so those adding new sources can better determine their respective
	* priority values.
	*/
	#define foreach_fib_source \
	/** you can't do better then the special source */ \
	_(FIB_SOURCE_SPECIAL, 0x00, FIB_SOURCE_BH_SIMPLE) \
	_(FIB_SOURCE_CLASSIFY, 0x01, FIB_SOURCE_BH_SIMPLE) \
	_(FIB_SOURCE_PROXY, 0x02, FIB_SOURCE_BH_SIMPLE) \
	_(FIB_SOURCE_INTERFACE, 0x03, FIB_SOURCE_BH_INTERFACE) \
	_(FIB_SOURCE_SR, 0x10, FIB_SOURCE_BH_API) \
	_(FIB_SOURCE_BIER, 0x20, FIB_SOURCE_BH_SIMPLE) \
	_(FIB_SOURCE_6RD, 0x30, FIB_SOURCE_BH_API) \
	_(FIB_SOURCE_API, 0x80, FIB_SOURCE_BH_API) \
	_(FIB_SOURCE_CLI, 0x81, FIB_SOURCE_BH_API) \
	_(FIB_SOURCE_LISP, 0x90, FIB_SOURCE_BH_LISP) \
	_(FIB_SOURCE_MAP, 0xa0, FIB_SOURCE_BH_SIMPLE) \
	_(FIB_SOURCE_DHCP, 0xb0, FIB_SOURCE_BH_API) \
	_(FIB_SOURCE_IP6_ND_PROXY, 0xc0, FIB_SOURCE_BH_API) \
	_(FIB_SOURCE_IP6_ND, 0xc1, FIB_SOURCE_BH_API) \
	_(FIB_SOURCE_ADJ, 0xd0, FIB_SOURCE_BH_ADJ) \
	_(FIB_SOURCE_MPLS, 0xe0, FIB_SOURCE_BH_MPLS) \
	_(FIB_SOURCE_AE, 0xf0, FIB_SOURCE_BH_SIMPLE) \
	_(FIB_SOURCE_RR, 0xfb, FIB_SOURCE_BH_RR) \
	_(FIB_SOURCE_URPF_EXEMPT, 0xfc, FIB_SOURCE_BH_RR) \
	_(FIB_SOURCE_DEFAULT_ROUTE, 0xfd, FIB_SOURCE_BH_DROP) \
	_(FIB_SOURCE_INTERPOSE, 0xfe, FIB_SOURCE_BH_INTERPOSE) \
	_(FIB_SOURCE_INVALID, 0xff, FIB_SOURCE_BH_DROP)

	/**
	* Some priority values that plugins might use when they are not to concerned
	* where in the list they'll go.
	*/
	#define FIB_SOURCE_PRIORITY_HI 0x10
	#define FIB_SOURCE_PRIORITY_LOW 0xd0


	extern u16 fib_source_get_prio(fib_source_t src);
	extern fib_source_behaviour_t fib_source_get_behaviour(fib_source_t src);
	extern fib_source_priority_cmp_t fib_source_cmp(fib_source_t s1,
	fib_source_t s2);

	extern u8 format_fib_source(u8 s, va_list *a);

	extern fib_source_t fib_source_allocate(const char *name,
	fib_source_priority_t prio,
	fib_source_behaviour_t bh);

	extern void fib_source_register(fib_source_t src,
	fib_source_priority_t prio,
	fib_source_behaviour_t bh);

	typedef walk_rc_t (*fib_source_walk_t)(fib_source_t id,
	const char *name,
	fib_source_priority_t prio,
	fib_source_behaviour_t bh,
	void *ctx);
	extern void fib_source_walk(fib_source_walk_t fn,
	void *ctx);

	extern void fib_source_module_init(void);

	#endif