[mirror_frr.git] / bgpd / bgp_attr.h

/* BGP attributes. 
   Copyright (C) 1996, 97, 98 Kunihiro Ishiguro

This file is part of GNU Zebra.

GNU Zebra is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.

GNU Zebra 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 GNU Zebra; see the file COPYING.  If not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.  */

#ifndef _QUAGGA_BGP_ATTR_H
#define _QUAGGA_BGP_ATTR_H

/* Simple bit mapping. */
#define BITMAP_NBBY 8

#define SET_BITMAP(MAP, NUM) \
        SET_FLAG (MAP[(NUM) / BITMAP_NBBY], 1 << ((NUM) % BITMAP_NBBY))

#define CHECK_BITMAP(MAP, NUM) \
        CHECK_FLAG (MAP[(NUM) / BITMAP_NBBY], 1 << ((NUM) % BITMAP_NBBY))

#define BGP_MED_MAX UINT32_MAX


/* BGP Attribute type range. */
#define BGP_ATTR_TYPE_RANGE     256
#define BGP_ATTR_BITMAP_SIZE    (BGP_ATTR_TYPE_RANGE / BITMAP_NBBY)

/* BGP Attribute flags. */
#define BGP_ATTR_FLAG_OPTIONAL  0x80	/* Attribute is optional. */
#define BGP_ATTR_FLAG_TRANS     0x40	/* Attribute is transitive. */
#define BGP_ATTR_FLAG_PARTIAL   0x20	/* Attribute is partial. */
#define BGP_ATTR_FLAG_EXTLEN    0x10	/* Extended length flag. */

/* BGP attribute header must bigger than 2. */
#define BGP_ATTR_MIN_LEN        3       /* Attribute flag, type length. */
#define BGP_ATTR_DEFAULT_WEIGHT 32768

/* Valid lengths for mp_nexthop_len */
#define BGP_ATTR_NHLEN_IPV4               IPV4_MAX_BYTELEN
#define BGP_ATTR_NHLEN_VPNV4              8+IPV4_MAX_BYTELEN
#define BGP_ATTR_NHLEN_IPV6_GLOBAL        IPV6_MAX_BYTELEN
#define BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL (IPV6_MAX_BYTELEN * 2)
#define BGP_ATTR_NHLEN_VPNV6_GLOBAL       8+IPV6_MAX_BYTELEN
#define BGP_ATTR_NHLEN_VPNV6_GLOBAL_AND_LL ((8+IPV6_MAX_BYTELEN) * 2)


struct bgp_attr_encap_subtlv {
    struct bgp_attr_encap_subtlv	*next;		/* for chaining */
    uint16_t				type;
    uint16_t				length;
    uint8_t				value[1];	/* will be extended */
};

#if ENABLE_BGP_VNC
/*
 * old rfp<->rfapi representation
 */
struct bgp_tea_options {
    struct bgp_tea_options *next;
    uint8_t               options_count;
    uint16_t              options_length; /* each TLV may be 256 in length */
    uint8_t               type;
    uint8_t               length;
    void                 *value; /* pointer to data */
};

#endif

/* Additional/uncommon BGP attributes.
 * lazily allocated as and when a struct attr
 * requires it.
 */
struct attr_extra
{
  /* Multi-Protocol Nexthop, AFI IPv6 */
  struct in6_addr mp_nexthop_global;
  struct in6_addr mp_nexthop_local;

  /* Extended Communities attribute. */
  struct ecommunity *ecommunity;
  
  /* Route-Reflector Cluster attribute */
  struct cluster_list *cluster;
  
  /* Unknown transitive attribute. */
  struct transit *transit;

  struct in_addr mp_nexthop_global_in;
  
  /* Aggregator Router ID attribute */
  struct in_addr aggregator_addr;
  
  /* Route Reflector Originator attribute */
  struct in_addr originator_id;
  
  /* Local weight, not actually an attribute */
  u_int32_t weight;
  
  /* Aggregator ASN */
  as_t aggregator_as;
  
  /* MP Nexthop length */
  u_char mp_nexthop_len;

  /* MP Nexthop preference */
  u_char mp_nexthop_prefer_global;

  /* route tag */
  route_tag_t tag;

  uint16_t			encap_tunneltype;	/* grr */
  struct bgp_attr_encap_subtlv *encap_subtlvs;		/* rfc5512 */

#if ENABLE_BGP_VNC
  struct bgp_attr_encap_subtlv *vnc_subtlvs;		/* VNC-specific */
#endif
};

/* BGP core attribute structure. */
struct attr
{
  /* AS Path structure */
  struct aspath *aspath;

  /* Community structure */
  struct community *community;	
  
  /* Lazily allocated pointer to extra attributes */
  struct attr_extra *extra;
  
  /* Reference count of this attribute. */
  unsigned long refcnt;

  /* Flag of attribute is set or not. */
  u_int32_t flag;
  
  /* Apart from in6_addr, the remaining static attributes */
  struct in_addr nexthop;
  u_int32_t med;
  u_int32_t local_pref;
  ifindex_t nh_ifindex;
  
  /* Path origin attribute */
  u_char origin;

  /* has the route-map changed any attribute?
     Used on the peer outbound side. */
  u_int32_t rmap_change_flags;
};

/* rmap_change_flags definition */
#define BATTR_RMAP_IPV4_NHOP_CHANGED (1 << 0)
#define BATTR_RMAP_NEXTHOP_PEER_ADDRESS (1 << 1)
#define BATTR_REFLECTED (1 << 2)
#define BATTR_RMAP_NEXTHOP_UNCHANGED (1 << 3)
#define BATTR_RMAP_IPV6_GLOBAL_NHOP_CHANGED (1 << 4)
#define BATTR_RMAP_IPV6_LL_NHOP_CHANGED (1 << 5)
#define BATTR_RMAP_IPV6_PREFER_GLOBAL_CHANGED (1 << 6)

/* Router Reflector related structure. */
struct cluster_list
{
  unsigned long refcnt;
  int length;
  struct in_addr *list;
};

/* Unknown transit attribute. */
struct transit
{
  unsigned long refcnt;
  int length;
  u_char *val;
};

#define ATTR_FLAG_BIT(X)  (1 << ((X) - 1))

#define BGP_CLUSTER_LIST_LENGTH(attr)				\
  (((attr)->flag & ATTR_FLAG_BIT(BGP_ATTR_CLUSTER_LIST)) ?	\
   (attr)->extra->cluster->length : 0)

typedef enum {
 BGP_ATTR_PARSE_PROCEED = 0,
 BGP_ATTR_PARSE_ERROR = -1,
 BGP_ATTR_PARSE_WITHDRAW = -2,

 /* only used internally, send notify + convert to BGP_ATTR_PARSE_ERROR */
 BGP_ATTR_PARSE_ERROR_NOTIFYPLS = -3,
} bgp_attr_parse_ret_t;

struct bpacket_attr_vec_arr;

/* Prototypes. */
extern void bgp_attr_init (void);
extern void bgp_attr_finish (void);
extern bgp_attr_parse_ret_t bgp_attr_parse (struct peer *, struct attr *,
                                           bgp_size_t, struct bgp_nlri *,
                                           struct bgp_nlri *);
extern struct attr_extra *bgp_attr_extra_get (struct attr *);
extern void bgp_attr_extra_free (struct attr *);
extern void bgp_attr_dup (struct attr *, struct attr *);
extern void bgp_attr_deep_dup (struct attr *, struct attr *);
extern void bgp_attr_deep_free (struct attr *);
extern struct attr *bgp_attr_intern (struct attr *attr);
extern struct attr *bgp_attr_refcount (struct attr *attr);
extern void bgp_attr_unintern_sub (struct attr *);
extern void bgp_attr_unintern (struct attr **);
extern void bgp_attr_flush (struct attr *);
extern struct attr *bgp_attr_default_set (struct attr *attr, u_char);
extern struct attr *bgp_attr_default_intern (u_char);
extern struct attr *bgp_attr_aggregate_intern (struct bgp *, u_char,
                                        struct aspath *, 
                                        struct community *, int as_set, u_char);
extern bgp_size_t bgp_packet_attribute (struct bgp *bgp, struct peer *,
					struct stream *, struct attr *,
					struct bpacket_attr_vec_arr *vecarr,
					struct prefix *, afi_t, safi_t,
					struct peer *, struct prefix_rd *,
					u_char *, int, u_int32_t);
extern void bgp_dump_routes_attr (struct stream *, struct attr *,
                                  struct prefix *);
extern int attrhash_cmp (const void *, const void *);
extern unsigned int attrhash_key_make (void *);
extern void attr_show_all (struct vty *);
extern unsigned long int attr_count (void);
extern unsigned long int attr_unknown_count (void);

/* Cluster list prototypes. */
extern int cluster_loop_check (struct cluster_list *, struct in_addr);
extern void cluster_unintern (struct cluster_list *);

/* Transit attribute prototypes. */
void transit_unintern (struct transit *);

/* Below exported for unit-test purposes only */
struct bgp_attr_parser_args {
  struct peer *peer;
  bgp_size_t length; /* attribute data length; */
  bgp_size_t total; /* total length, inc header */
  struct attr *attr;
  u_int8_t type;
  u_int8_t flags;
  u_char *startp;   
};
extern int bgp_mp_reach_parse (struct bgp_attr_parser_args *args, 
			       struct bgp_nlri *);
extern int bgp_mp_unreach_parse (struct bgp_attr_parser_args *args,
                                 struct bgp_nlri *);

extern struct bgp_attr_encap_subtlv *
encap_tlv_dup(struct bgp_attr_encap_subtlv *orig);

extern void
bgp_attr_flush_encap(struct attr *attr);

/**
 * Set of functions to encode MP_REACH_NLRI and MP_UNREACH_NLRI attributes.
 * Typical call sequence is to call _start(), followed by multiple _prefix(),
 * one for each NLRI that needs to be encoded into the UPDATE message, and
 * finally the _end() function.
 */
extern size_t bgp_packet_mpattr_start(struct stream *s, afi_t afi, safi_t safi,
                                      afi_t nh_afi,
                                      struct bpacket_attr_vec_arr *vecarr,
				      struct attr *attr);
extern void bgp_packet_mpattr_prefix(struct stream *s, afi_t afi, safi_t safi,
				     struct prefix *p, struct prefix_rd *prd,
				     u_char *tag, int addpath_encode,
                                     u_int32_t addpath_tx_id);
extern size_t bgp_packet_mpattr_prefix_size(afi_t afi, safi_t safi,
                                            struct prefix *p);
extern void bgp_packet_mpattr_end(struct stream *s, size_t sizep);

extern size_t bgp_packet_mpunreach_start (struct stream *s, afi_t afi,
					  safi_t safi);
extern void bgp_packet_mpunreach_prefix (struct stream *s, struct prefix *p,
			     afi_t afi, safi_t safi, struct prefix_rd *prd,
			     u_char *tag, int, u_int32_t);
extern void bgp_packet_mpunreach_end (struct stream *s, size_t attrlen_pnt);

static inline int
bgp_rmap_nhop_changed(u_int32_t out_rmap_flags, u_int32_t in_rmap_flags)
{
  return ((CHECK_FLAG(out_rmap_flags, BATTR_RMAP_NEXTHOP_PEER_ADDRESS) ||
           CHECK_FLAG(out_rmap_flags, BATTR_RMAP_NEXTHOP_UNCHANGED) ||
           CHECK_FLAG(out_rmap_flags, BATTR_RMAP_IPV4_NHOP_CHANGED) ||
           CHECK_FLAG(out_rmap_flags, BATTR_RMAP_IPV6_GLOBAL_NHOP_CHANGED) ||
           CHECK_FLAG(out_rmap_flags, BATTR_RMAP_IPV6_PREFER_GLOBAL_CHANGED) ||
           CHECK_FLAG(out_rmap_flags, BATTR_RMAP_IPV6_LL_NHOP_CHANGED) ||
           CHECK_FLAG(in_rmap_flags, BATTR_RMAP_NEXTHOP_UNCHANGED)) ? 1 : 0);
}

#endif /* _QUAGGA_BGP_ATTR_H */
Commit	Line	Data
718e3744	1	/* BGP attributes.
	2	Copyright (C) 1996, 97, 98 Kunihiro Ishiguro
	3
	4	This file is part of GNU Zebra.
	5
	6	GNU Zebra is free software; you can redistribute it and/or modify it
	7	under the terms of the GNU General Public License as published by the
	8	Free Software Foundation; either version 2, or (at your option) any
	9	later version.
	10
	11	GNU Zebra is distributed in the hope that it will be useful, but
	12	WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with GNU Zebra; see the file COPYING. If not, write to the Free
	18	Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
	19	02111-1307, USA. */
	20
00d252cb	21	#ifndef _QUAGGA_BGP_ATTR_H
	22	#define _QUAGGA_BGP_ATTR_H
	23
718e3744	24	/* Simple bit mapping. */
	25	#define BITMAP_NBBY 8
	26
	27	#define SET_BITMAP(MAP, NUM) \
	28	SET_FLAG (MAP[(NUM) / BITMAP_NBBY], 1 << ((NUM) % BITMAP_NBBY))
	29
	30	#define CHECK_BITMAP(MAP, NUM) \
	31	CHECK_FLAG (MAP[(NUM) / BITMAP_NBBY], 1 << ((NUM) % BITMAP_NBBY))
	32
3b424979	33	#define BGP_MED_MAX UINT32_MAX
3b424979	34
03e214c8	35
718e3744	36	/* BGP Attribute type range. */
	37	#define BGP_ATTR_TYPE_RANGE 256
	38	#define BGP_ATTR_BITMAP_SIZE (BGP_ATTR_TYPE_RANGE / BITMAP_NBBY)
	39
	40	/* BGP Attribute flags. */
	41	#define BGP_ATTR_FLAG_OPTIONAL 0x80 /* Attribute is optional. */
	42	#define BGP_ATTR_FLAG_TRANS 0x40 /* Attribute is transitive. */
	43	#define BGP_ATTR_FLAG_PARTIAL 0x20 /* Attribute is partial. */
	44	#define BGP_ATTR_FLAG_EXTLEN 0x10 /* Extended length flag. */
	45
	46	/* BGP attribute header must bigger than 2. */
370b64a2	47	#define BGP_ATTR_MIN_LEN 3 /* Attribute flag, type length. */
03e214c8 PJ	48	#define BGP_ATTR_DEFAULT_WEIGHT 32768
03e214c8 PJ	49
801a9bcc DS	50	/* Valid lengths for mp_nexthop_len */
801a9bcc DS	51	#define BGP_ATTR_NHLEN_IPV4 IPV4_MAX_BYTELEN
945c8fe9	52	#define BGP_ATTR_NHLEN_VPNV4 8+IPV4_MAX_BYTELEN
801a9bcc DS	53	#define BGP_ATTR_NHLEN_IPV6_GLOBAL IPV6_MAX_BYTELEN
801a9bcc DS	54	#define BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL (IPV6_MAX_BYTELEN * 2)
945c8fe9 LB	55	#define BGP_ATTR_NHLEN_VPNV6_GLOBAL 8+IPV6_MAX_BYTELEN
945c8fe9 LB	56	#define BGP_ATTR_NHLEN_VPNV6_GLOBAL_AND_LL ((8+IPV6_MAX_BYTELEN) * 2)
801a9bcc	57
f4c89855 LB	58
	59	struct bgp_attr_encap_subtlv {
	60	struct bgp_attr_encap_subtlv next; / for chaining */
	61	uint16_t type;
	62	uint16_t length;
	63	uint8_t value[1]; /* will be extended */
	64	};
	65
65efcfce LB	66	#if ENABLE_BGP_VNC
	67	/*
	68	* old rfp<->rfapi representation
	69	*/
	70	struct bgp_tea_options {
	71	struct bgp_tea_options *next;
	72	uint8_t options_count;
	73	uint16_t options_length; /* each TLV may be 256 in length */
	74	uint8_t type;
	75	uint8_t length;
	76	void value; / pointer to data */
	77	};
	78
	79	#endif
	80
fb982c25 PJ	81	/* Additional/uncommon BGP attributes.
	82	* lazily allocated as and when a struct attr
	83	* requires it.
	84	*/
	85	struct attr_extra
718e3744	86	{
fb982c25	87	/* Multi-Protocol Nexthop, AFI IPv6 */
718e3744	88	struct in6_addr mp_nexthop_global;
718e3744	89	struct in6_addr mp_nexthop_local;
718e3744	90
718e3744	91	/* Extended Communities attribute. */
718e3744	92	struct ecommunity *ecommunity;
cbdfbaa5 PJ	93
	94	/* Route-Reflector Cluster attribute */
	95	struct cluster_list *cluster;
	96
718e3744	97	/* Unknown transitive attribute. */
718e3744	98	struct transit *transit;
cbdfbaa5	99
fb982c25	100	struct in_addr mp_nexthop_global_in;
fb982c25 PJ	101
	102	/* Aggregator Router ID attribute */
	103	struct in_addr aggregator_addr;
	104
	105	/* Route Reflector Originator attribute */
	106	struct in_addr originator_id;
	107
	108	/* Local weight, not actually an attribute */
	109	u_int32_t weight;
	110
	111	/* Aggregator ASN */
	112	as_t aggregator_as;
	113
	114	/* MP Nexthop length */
	115	u_char mp_nexthop_len;
0d9551dc	116
161995ea DS	117	/* MP Nexthop preference */
	118	u_char mp_nexthop_prefer_global;
	119
0d9551dc	120	/* route tag */
dc9ffce8	121	route_tag_t tag;
f4c89855 LB	122
	123	uint16_t encap_tunneltype; /* grr */
	124	struct bgp_attr_encap_subtlv encap_subtlvs; / rfc5512 */
65efcfce LB	125
	126	#if ENABLE_BGP_VNC
	127	struct bgp_attr_encap_subtlv vnc_subtlvs; / VNC-specific */
	128	#endif
fb982c25 PJ	129	};
	130
	131	/* BGP core attribute structure. */
	132	struct attr
	133	{
	134	/* AS Path structure */
	135	struct aspath *aspath;
	136
	137	/* Community structure */
	138	struct community *community;
	139
	140	/* Lazily allocated pointer to extra attributes */
	141	struct attr_extra *extra;
	142
cbdfbaa5 PJ	143	/* Reference count of this attribute. */
	144	unsigned long refcnt;
	145
	146	/* Flag of attribute is set or not. */
	147	u_int32_t flag;
	148
	149	/* Apart from in6_addr, the remaining static attributes */
	150	struct in_addr nexthop;
	151	u_int32_t med;
	152	u_int32_t local_pref;
b892f1dd	153	ifindex_t nh_ifindex;
41367172	154
fb982c25	155	/* Path origin attribute */
cbdfbaa5	156	u_char origin;
3f9c7369 DS	157
	158	/* has the route-map changed any attribute?
	159	Used on the peer outbound side. */
	160	u_int32_t rmap_change_flags;
718e3744	161	};
718e3744	162
3f9c7369	163	/* rmap_change_flags definition */
3811f1e2	164	#define BATTR_RMAP_IPV4_NHOP_CHANGED (1 << 0)
3f9c7369 DS	165	#define BATTR_RMAP_NEXTHOP_PEER_ADDRESS (1 << 1)
3f9c7369 DS	166	#define BATTR_REFLECTED (1 << 2)
316e074d	167	#define BATTR_RMAP_NEXTHOP_UNCHANGED (1 << 3)
3811f1e2 DS	168	#define BATTR_RMAP_IPV6_GLOBAL_NHOP_CHANGED (1 << 4)
3811f1e2 DS	169	#define BATTR_RMAP_IPV6_LL_NHOP_CHANGED (1 << 5)
b2e03f7a	170	#define BATTR_RMAP_IPV6_PREFER_GLOBAL_CHANGED (1 << 6)
3f9c7369	171
718e3744	172	/* Router Reflector related structure. */
	173	struct cluster_list
	174	{
	175	unsigned long refcnt;
	176	int length;
	177	struct in_addr *list;
	178	};
	179
	180	/* Unknown transit attribute. */
	181	struct transit
	182	{
	183	unsigned long refcnt;
	184	int length;
	185	u_char *val;
	186	};
	187
	188	#define ATTR_FLAG_BIT(X) (1 << ((X) - 1))
	189
5e242b0d DS	190	#define BGP_CLUSTER_LIST_LENGTH(attr) \
	191	(((attr)->flag & ATTR_FLAG_BIT(BGP_ATTR_CLUSTER_LIST)) ? \
	192	(attr)->extra->cluster->length : 0)
	193
b881c707 PJ	194	typedef enum {
	195	BGP_ATTR_PARSE_PROCEED = 0,
	196	BGP_ATTR_PARSE_ERROR = -1,
	197	BGP_ATTR_PARSE_WITHDRAW = -2,
f57000c0 DL	198
	199	/* only used internally, send notify + convert to BGP_ATTR_PARSE_ERROR */
	200	BGP_ATTR_PARSE_ERROR_NOTIFYPLS = -3,
b881c707 PJ	201	} bgp_attr_parse_ret_t;
b881c707 PJ	202
3f9c7369 DS	203	struct bpacket_attr_vec_arr;
3f9c7369 DS	204
718e3744	205	/* Prototypes. */
94f2b392	206	extern void bgp_attr_init (void);
228da428	207	extern void bgp_attr_finish (void);
b881c707 PJ	208	extern bgp_attr_parse_ret_t bgp_attr_parse (struct peer , struct attr ,
b881c707 PJ	209	bgp_size_t, struct bgp_nlri *,
52a51fd3	210	struct bgp_nlri *);
fb982c25 PJ	211	extern struct attr_extra bgp_attr_extra_get (struct attr );
	212	extern void bgp_attr_extra_free (struct attr *);
	213	extern void bgp_attr_dup (struct attr , struct attr );
73ac8160 DS	214	extern void bgp_attr_deep_dup (struct attr , struct attr );
73ac8160 DS	215	extern void bgp_attr_deep_free (struct attr *);
94f2b392	216	extern struct attr bgp_attr_intern (struct attr attr);
3f9c7369	217	extern struct attr bgp_attr_refcount (struct attr attr);
b881c707	218	extern void bgp_attr_unintern_sub (struct attr *);
f6f434b2	219	extern void bgp_attr_unintern (struct attr **);
94f2b392	220	extern void bgp_attr_flush (struct attr *);
	221	extern struct attr bgp_attr_default_set (struct attr attr, u_char);
	222	extern struct attr *bgp_attr_default_intern (u_char);
	223	extern struct attr bgp_attr_aggregate_intern (struct bgp , u_char,
5228ad27	224	struct aspath *,
42f7e184	225	struct community *, int as_set, u_char);
8c71e481 PM	226	extern bgp_size_t bgp_packet_attribute (struct bgp bgp, struct peer ,
8c71e481 PM	227	struct stream , struct attr ,
3f9c7369	228	struct bpacket_attr_vec_arr *vecarr,
8c71e481 PM	229	struct prefix *, afi_t, safi_t,
8c71e481 PM	230	struct peer , struct prefix_rd ,
adbac85e	231	u_char *, int, u_int32_t);
94f2b392	232	extern void bgp_dump_routes_attr (struct stream , struct attr ,
adbac85e	233	struct prefix *);
ffe11cfb	234	extern int attrhash_cmp (const void , const void );
923de654	235	extern unsigned int attrhash_key_make (void *);
94f2b392	236	extern void attr_show_all (struct vty *);
cbdfbaa5 PJ	237	extern unsigned long int attr_count (void);
cbdfbaa5 PJ	238	extern unsigned long int attr_unknown_count (void);
718e3744	239
718e3744	240	/* Cluster list prototypes. */
94f2b392	241	extern int cluster_loop_check (struct cluster_list *, struct in_addr);
94f2b392	242	extern void cluster_unintern (struct cluster_list *);
718e3744	243
	244	/* Transit attribute prototypes. */
	245	void transit_unintern (struct transit *);
00d252cb	246
835315bf PJ	247	/* Below exported for unit-test purposes only */
	248	struct bgp_attr_parser_args {
	249	struct peer *peer;
	250	bgp_size_t length; /* attribute data length; */
	251	bgp_size_t total; /* total length, inc header */
	252	struct attr *attr;
	253	u_int8_t type;
	254	u_int8_t flags;
	255	u_char *startp;
	256	};
	257	extern int bgp_mp_reach_parse (struct bgp_attr_parser_args *args,
	258	struct bgp_nlri *);
	259	extern int bgp_mp_unreach_parse (struct bgp_attr_parser_args *args,
	260	struct bgp_nlri *);
03292809	261
f4c89855 LB	262	extern struct bgp_attr_encap_subtlv *
	263	encap_tlv_dup(struct bgp_attr_encap_subtlv *orig);
	264
	265	extern void
	266	bgp_attr_flush_encap(struct attr *attr);
	267
8c71e481 PM	268	/**
	269	* Set of functions to encode MP_REACH_NLRI and MP_UNREACH_NLRI attributes.
	270	* Typical call sequence is to call _start(), followed by multiple _prefix(),
	271	* one for each NLRI that needs to be encoded into the UPDATE message, and
	272	* finally the _end() function.
	273	*/
	274	extern size_t bgp_packet_mpattr_start(struct stream *s, afi_t afi, safi_t safi,
8a92a8a0 DS	275	afi_t nh_afi,
8a92a8a0 DS	276	struct bpacket_attr_vec_arr *vecarr,
8c71e481 PM	277	struct attr *attr);
	278	extern void bgp_packet_mpattr_prefix(struct stream *s, afi_t afi, safi_t safi,
	279	struct prefix p, struct prefix_rd prd,
adbac85e DW	280	u_char *tag, int addpath_encode,
adbac85e DW	281	u_int32_t addpath_tx_id);
93b73dfa LB	282	extern size_t bgp_packet_mpattr_prefix_size(afi_t afi, safi_t safi,
93b73dfa LB	283	struct prefix *p);
8c71e481 PM	284	extern void bgp_packet_mpattr_end(struct stream *s, size_t sizep);
	285
	286	extern size_t bgp_packet_mpunreach_start (struct stream *s, afi_t afi,
	287	safi_t safi);
	288	extern void bgp_packet_mpunreach_prefix (struct stream s, struct prefix p,
	289	afi_t afi, safi_t safi, struct prefix_rd *prd,
adbac85e	290	u_char *tag, int, u_int32_t);
8c71e481 PM	291	extern void bgp_packet_mpunreach_end (struct stream *s, size_t attrlen_pnt);
8c71e481 PM	292
3811f1e2 DS	293	static inline int
	294	bgp_rmap_nhop_changed(u_int32_t out_rmap_flags, u_int32_t in_rmap_flags)
	295	{
	296	return ((CHECK_FLAG(out_rmap_flags, BATTR_RMAP_NEXTHOP_PEER_ADDRESS) \|\|
	297	CHECK_FLAG(out_rmap_flags, BATTR_RMAP_NEXTHOP_UNCHANGED) \|\|
	298	CHECK_FLAG(out_rmap_flags, BATTR_RMAP_IPV4_NHOP_CHANGED) \|\|
	299	CHECK_FLAG(out_rmap_flags, BATTR_RMAP_IPV6_GLOBAL_NHOP_CHANGED) \|\|
b2e03f7a	300	CHECK_FLAG(out_rmap_flags, BATTR_RMAP_IPV6_PREFER_GLOBAL_CHANGED) \|\|
3811f1e2 DS	301	CHECK_FLAG(out_rmap_flags, BATTR_RMAP_IPV6_LL_NHOP_CHANGED) \|\|
	302	CHECK_FLAG(in_rmap_flags, BATTR_RMAP_NEXTHOP_UNCHANGED)) ? 1 : 0);
	303	}
	304
00d252cb	305	#endif /* _QUAGGA_BGP_ATTR_H */