[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 this program; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef _QUAGGA_BGP_ATTR_H
#define _QUAGGA_BGP_ATTR_H

#include "mpls.h"
#include "bgp_attr_evpn.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)

/* Prefix SID types */
#define BGP_PREFIX_SID_LABEL_INDEX     1
#define BGP_PREFIX_SID_IPV6            2
#define BGP_PREFIX_SID_ORIGINATOR_SRGB 3

#define BGP_PREFIX_SID_LABEL_INDEX_LENGTH      7
#define BGP_PREFIX_SID_IPV6_LENGTH            19
#define BGP_PREFIX_SID_ORIGINATOR_SRGB_LENGTH  6

struct bgp_attr_encap_subtlv {
	struct bgp_attr_encap_subtlv *next; /* for chaining */
	/* Reference count of this attribute. */
	unsigned long refcnt;
	uint16_t type;
	uint16_t length;
	uint8_t value[0]; /* 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

/* Overlay Index Info */
struct overlay_index {
	struct eth_segment_id eth_s_id;
	union gw_addr gw_ip;
};

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

	/* Community structure */
	struct community *community;

	/* Reference count of this attribute. */
	unsigned long refcnt;

	/* Flag of attribute is set or not. */
	uint64_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;

	/* Multi-Protocol Nexthop, AFI IPv6 */
	struct in6_addr mp_nexthop_global;
	struct in6_addr mp_nexthop_local;

	/* Extended Communities attribute. */
	struct ecommunity *ecommunity;

	/* Large Communities attribute. */
	struct lcommunity *lcommunity;

	/* 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;

	/* Static MAC for EVPN */
	u_char sticky;

	/* route tag */
	route_tag_t tag;

	/* Label index */
	u_int32_t label_index;

	/* MPLS label */
	mpls_label_t label;

	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
	/* EVPN */
	struct overlay_index evpn_overlay;

	/* EVPN MAC Mobility sequence number, if any. */
	u_int32_t mm_seqnum;
};

/* 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)  (1ULL << ((X) - 1))

#define BGP_CLUSTER_LIST_LENGTH(attr)                                          \
	(((attr)->flag & ATTR_FLAG_BIT(BGP_ATTR_CLUSTER_LIST))                 \
		 ? (attr)->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 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_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 *,
				       mpls_label_t *, 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, struct peer *peer,
				      afi_t afi, safi_t safi,
				      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,
				     mpls_label_t *label, int addpath_encode,
				     u_int32_t addpath_tx_id, struct attr *);
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, mpls_label_t *,
					int, u_int32_t, struct attr *);
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);
}

static inline u_int32_t mac_mobility_seqnum(struct attr *attr)
{
	return (attr) ? attr->mm_seqnum : 0;
}

#endif /* _QUAGGA_BGP_ATTR_H */
Commit	Line	Data
d62a17ae	1	/* BGP attributes.
896014f4 DL	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 along
	17	* with this program; see the file COPYING; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
718e3744	20
00d252cb	21	#ifndef _QUAGGA_BGP_ATTR_H
	22	#define _QUAGGA_BGP_ATTR_H
	23
9bedbb1e	24	#include "mpls.h"
684a7227 PG	25	#include "bgp_attr_evpn.h"
684a7227 PG	26
718e3744	27	/* Simple bit mapping. */
	28	#define BITMAP_NBBY 8
	29
d62a17ae	30	#define SET_BITMAP(MAP, NUM) \
d62a17ae	31	SET_FLAG(MAP[(NUM) / BITMAP_NBBY], 1 << ((NUM) % BITMAP_NBBY))
718e3744	32
d62a17ae	33	#define CHECK_BITMAP(MAP, NUM) \
d62a17ae	34	CHECK_FLAG(MAP[(NUM) / BITMAP_NBBY], 1 << ((NUM) % BITMAP_NBBY))
718e3744	35
3b424979	36	#define BGP_MED_MAX UINT32_MAX
3b424979	37
718e3744	38	/* BGP Attribute type range. */
	39	#define BGP_ATTR_TYPE_RANGE 256
	40	#define BGP_ATTR_BITMAP_SIZE (BGP_ATTR_TYPE_RANGE / BITMAP_NBBY)
	41
	42	/* BGP Attribute flags. */
	43	#define BGP_ATTR_FLAG_OPTIONAL 0x80 /* Attribute is optional. */
	44	#define BGP_ATTR_FLAG_TRANS 0x40 /* Attribute is transitive. */
	45	#define BGP_ATTR_FLAG_PARTIAL 0x20 /* Attribute is partial. */
	46	#define BGP_ATTR_FLAG_EXTLEN 0x10 /* Extended length flag. */
	47
	48	/* BGP attribute header must bigger than 2. */
370b64a2	49	#define BGP_ATTR_MIN_LEN 3 /* Attribute flag, type length. */
03e214c8 PJ	50	#define BGP_ATTR_DEFAULT_WEIGHT 32768
03e214c8 PJ	51
801a9bcc DS	52	/* Valid lengths for mp_nexthop_len */
801a9bcc DS	53	#define BGP_ATTR_NHLEN_IPV4 IPV4_MAX_BYTELEN
945c8fe9	54	#define BGP_ATTR_NHLEN_VPNV4 8+IPV4_MAX_BYTELEN
801a9bcc DS	55	#define BGP_ATTR_NHLEN_IPV6_GLOBAL IPV6_MAX_BYTELEN
801a9bcc DS	56	#define BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL (IPV6_MAX_BYTELEN * 2)
945c8fe9 LB	57	#define BGP_ATTR_NHLEN_VPNV6_GLOBAL 8+IPV6_MAX_BYTELEN
945c8fe9 LB	58	#define BGP_ATTR_NHLEN_VPNV6_GLOBAL_AND_LL ((8+IPV6_MAX_BYTELEN) * 2)
801a9bcc	59
c5a543b4 DW	60	/* Prefix SID types */
	61	#define BGP_PREFIX_SID_LABEL_INDEX 1
	62	#define BGP_PREFIX_SID_IPV6 2
	63	#define BGP_PREFIX_SID_ORIGINATOR_SRGB 3
	64
	65	#define BGP_PREFIX_SID_LABEL_INDEX_LENGTH 7
	66	#define BGP_PREFIX_SID_IPV6_LENGTH 19
	67	#define BGP_PREFIX_SID_ORIGINATOR_SRGB_LENGTH 6
f4c89855 LB	68
f4c89855 LB	69	struct bgp_attr_encap_subtlv {
d62a17ae	70	struct bgp_attr_encap_subtlv next; / for chaining */
	71	/* Reference count of this attribute. */
	72	unsigned long refcnt;
	73	uint16_t type;
	74	uint16_t length;
8c9cc7bb	75	uint8_t value[0]; /* will be extended */
f4c89855 LB	76	};
f4c89855 LB	77
65efcfce LB	78	#if ENABLE_BGP_VNC
	79	/*
	80	* old rfp<->rfapi representation
	81	*/
	82	struct bgp_tea_options {
d62a17ae	83	struct bgp_tea_options *next;
	84	uint8_t options_count;
	85	uint16_t options_length; /* each TLV may be 256 in length */
	86	uint8_t type;
	87	uint8_t length;
	88	void value; / pointer to data */
65efcfce LB	89	};
	90
	91	#endif
	92
684a7227	93	/* Overlay Index Info */
d62a17ae	94	struct overlay_index {
	95	struct eth_segment_id eth_s_id;
	96	union gw_addr gw_ip;
684a7227 PG	97	};
684a7227 PG	98
aadc0905	99	/* BGP core attribute structure. */
d62a17ae	100	struct attr {
	101	/* AS Path structure */
	102	struct aspath *aspath;
	103
	104	/* Community structure */
	105	struct community *community;
	106
	107	/* Reference count of this attribute. */
	108	unsigned long refcnt;
	109
	110	/* Flag of attribute is set or not. */
	111	uint64_t flag;
	112
	113	/* Apart from in6_addr, the remaining static attributes */
	114	struct in_addr nexthop;
	115	u_int32_t med;
	116	u_int32_t local_pref;
	117	ifindex_t nh_ifindex;
	118
	119	/* Path origin attribute */
	120	u_char origin;
	121
	122	/* has the route-map changed any attribute?
	123	Used on the peer outbound side. */
	124	u_int32_t rmap_change_flags;
	125
	126	/* Multi-Protocol Nexthop, AFI IPv6 */
	127	struct in6_addr mp_nexthop_global;
	128	struct in6_addr mp_nexthop_local;
	129
	130	/* Extended Communities attribute. */
	131	struct ecommunity *ecommunity;
	132
	133	/* Large Communities attribute. */
	134	struct lcommunity *lcommunity;
	135
	136	/* Route-Reflector Cluster attribute */
	137	struct cluster_list *cluster;
	138
	139	/* Unknown transitive attribute. */
	140	struct transit *transit;
	141
	142	struct in_addr mp_nexthop_global_in;
	143
	144	/* Aggregator Router ID attribute */
	145	struct in_addr aggregator_addr;
	146
	147	/* Route Reflector Originator attribute */
	148	struct in_addr originator_id;
	149
	150	/* Local weight, not actually an attribute */
	151	u_int32_t weight;
	152
	153	/* Aggregator ASN */
	154	as_t aggregator_as;
	155
	156	/* MP Nexthop length */
	157	u_char mp_nexthop_len;
	158
	159	/* MP Nexthop preference */
	160	u_char mp_nexthop_prefer_global;
	161
	162	/* Static MAC for EVPN */
	163	u_char sticky;
164
165	/* route tag */
166	route_tag_t tag;
167
168	/* Label index */
169	u_int32_t label_index;
170
171	/* MPLS label */
172	mpls_label_t label;
173
174	uint16_t encap_tunneltype; /* grr */
175	struct bgp_attr_encap_subtlv encap_subtlvs; / rfc5512 */
65efcfce LB	176
65efcfce LB	177	#if ENABLE_BGP_VNC
d62a17ae	178	struct bgp_attr_encap_subtlv vnc_subtlvs; / VNC-specific */
65efcfce	179	#endif
d62a17ae	180	/* EVPN */
d62a17ae	181	struct overlay_index evpn_overlay;
128ea8ab	182
d62a17ae	183	/* EVPN MAC Mobility sequence number, if any. */
d62a17ae	184	u_int32_t mm_seqnum;
fb982c25 PJ	185	};
fb982c25 PJ	186
3f9c7369	187	/* rmap_change_flags definition */
3811f1e2	188	#define BATTR_RMAP_IPV4_NHOP_CHANGED (1 << 0)
3f9c7369 DS	189	#define BATTR_RMAP_NEXTHOP_PEER_ADDRESS (1 << 1)
3f9c7369 DS	190	#define BATTR_REFLECTED (1 << 2)
316e074d	191	#define BATTR_RMAP_NEXTHOP_UNCHANGED (1 << 3)
3811f1e2 DS	192	#define BATTR_RMAP_IPV6_GLOBAL_NHOP_CHANGED (1 << 4)
3811f1e2 DS	193	#define BATTR_RMAP_IPV6_LL_NHOP_CHANGED (1 << 5)
b2e03f7a	194	#define BATTR_RMAP_IPV6_PREFER_GLOBAL_CHANGED (1 << 6)
3f9c7369	195
718e3744	196	/* Router Reflector related structure. */
d62a17ae	197	struct cluster_list {
	198	unsigned long refcnt;
	199	int length;
	200	struct in_addr *list;
718e3744	201	};
	202
	203	/* Unknown transit attribute. */
d62a17ae	204	struct transit {
	205	unsigned long refcnt;
	206	int length;
	207	u_char *val;
718e3744	208	};
718e3744	209
02cd9458	210	#define ATTR_FLAG_BIT(X) (1ULL << ((X) - 1))
718e3744	211
d62a17ae	212	#define BGP_CLUSTER_LIST_LENGTH(attr) \
	213	(((attr)->flag & ATTR_FLAG_BIT(BGP_ATTR_CLUSTER_LIST)) \
	214	? (attr)->cluster->length \
	215	: 0)
5e242b0d	216
b881c707	217	typedef enum {
d62a17ae	218	BGP_ATTR_PARSE_PROCEED = 0,
	219	BGP_ATTR_PARSE_ERROR = -1,
	220	BGP_ATTR_PARSE_WITHDRAW = -2,
f57000c0	221
d62a17ae	222	/* only used internally, send notify + convert to BGP_ATTR_PARSE_ERROR
9d303b37	223	*/
d62a17ae	224	BGP_ATTR_PARSE_ERROR_NOTIFYPLS = -3,
b881c707 PJ	225	} bgp_attr_parse_ret_t;
b881c707 PJ	226
3f9c7369 DS	227	struct bpacket_attr_vec_arr;
3f9c7369 DS	228
718e3744	229	/* Prototypes. */
d62a17ae	230	extern void bgp_attr_init(void);
	231	extern void bgp_attr_finish(void);
	232	extern bgp_attr_parse_ret_t bgp_attr_parse(struct peer , struct attr ,
	233	bgp_size_t, struct bgp_nlri *,
	234	struct bgp_nlri *);
	235	extern void bgp_attr_dup(struct attr , struct attr );
	236	extern void bgp_attr_deep_dup(struct attr , struct attr );
	237	extern void bgp_attr_deep_free(struct attr *);
	238	extern struct attr bgp_attr_intern(struct attr attr);
	239	extern struct attr bgp_attr_refcount(struct attr attr);
	240	extern void bgp_attr_unintern_sub(struct attr *);
	241	extern void bgp_attr_unintern(struct attr **);
	242	extern void bgp_attr_flush(struct attr *);
	243	extern struct attr bgp_attr_default_set(struct attr attr, u_char);
	244	extern struct attr bgp_attr_aggregate_intern(struct bgp , u_char,
	245	struct aspath *,
	246	struct community *, int as_set,
	247	u_char);
	248	extern bgp_size_t bgp_packet_attribute(struct bgp bgp, struct peer ,
	249	struct stream , struct attr ,
	250	struct bpacket_attr_vec_arr *vecarr,
	251	struct prefix *, afi_t, safi_t,
	252	struct peer , struct prefix_rd ,
	253	mpls_label_t *, int, u_int32_t);
	254	extern void bgp_dump_routes_attr(struct stream , struct attr ,
	255	struct prefix *);
	256	extern int attrhash_cmp(const void , const void );
	257	extern unsigned int attrhash_key_make(void *);
	258	extern void attr_show_all(struct vty *);
	259	extern unsigned long int attr_count(void);
	260	extern unsigned long int attr_unknown_count(void);
718e3744	261
718e3744	262	/* Cluster list prototypes. */
d62a17ae	263	extern int cluster_loop_check(struct cluster_list *, struct in_addr);
d62a17ae	264	extern void cluster_unintern(struct cluster_list *);
718e3744	265
718e3744	266	/* Transit attribute prototypes. */
d62a17ae	267	void transit_unintern(struct transit *);
00d252cb	268
835315bf PJ	269	/* Below exported for unit-test purposes only */
835315bf PJ	270	struct bgp_attr_parser_args {
d62a17ae	271	struct peer *peer;
	272	bgp_size_t length; /* attribute data length; */
	273	bgp_size_t total; /* total length, inc header */
	274	struct attr *attr;
	275	u_int8_t type;
	276	u_int8_t flags;
	277	u_char *startp;
835315bf	278	};
d62a17ae	279	extern int bgp_mp_reach_parse(struct bgp_attr_parser_args *args,
	280	struct bgp_nlri *);
	281	extern int bgp_mp_unreach_parse(struct bgp_attr_parser_args *args,
	282	struct bgp_nlri *);
03292809	283
f4c89855 LB	284	extern struct bgp_attr_encap_subtlv *
	285	encap_tlv_dup(struct bgp_attr_encap_subtlv *orig);
	286
d62a17ae	287	extern void bgp_attr_flush_encap(struct attr *attr);
f4c89855	288
8c71e481 PM	289	/**
	290	* Set of functions to encode MP_REACH_NLRI and MP_UNREACH_NLRI attributes.
	291	* Typical call sequence is to call _start(), followed by multiple _prefix(),
	292	* one for each NLRI that needs to be encoded into the UPDATE message, and
	293	* finally the _end() function.
	294	*/
2b26882d	295	extern size_t bgp_packet_mpattr_start(struct stream s, struct peer peer,
d62a17ae	296	afi_t afi, safi_t safi,
d62a17ae	297	struct bpacket_attr_vec_arr *vecarr,
8c71e481 PM	298	struct attr *attr);
	299	extern void bgp_packet_mpattr_prefix(struct stream *s, afi_t afi, safi_t safi,
	300	struct prefix p, struct prefix_rd prd,
9bedbb1e	301	mpls_label_t *label, int addpath_encode,
d62a17ae	302	u_int32_t addpath_tx_id, struct attr *);
93b73dfa	303	extern size_t bgp_packet_mpattr_prefix_size(afi_t afi, safi_t safi,
d62a17ae	304	struct prefix *p);
8c71e481 PM	305	extern void bgp_packet_mpattr_end(struct stream *s, size_t sizep);
8c71e481 PM	306
d62a17ae	307	extern size_t bgp_packet_mpunreach_start(struct stream *s, afi_t afi,
	308	safi_t safi);
	309	extern void bgp_packet_mpunreach_prefix(struct stream s, struct prefix p,
	310	afi_t afi, safi_t safi,
	311	struct prefix_rd prd, mpls_label_t ,
	312	int, u_int32_t, struct attr *);
	313	extern void bgp_packet_mpunreach_end(struct stream *s, size_t attrlen_pnt);
8c71e481	314
d62a17ae	315	static inline int bgp_rmap_nhop_changed(u_int32_t out_rmap_flags,
d62a17ae	316	u_int32_t in_rmap_flags)
3811f1e2	317	{
d62a17ae	318	return ((CHECK_FLAG(out_rmap_flags, BATTR_RMAP_NEXTHOP_PEER_ADDRESS)
	319	\|\| CHECK_FLAG(out_rmap_flags, BATTR_RMAP_NEXTHOP_UNCHANGED)
	320	\|\| CHECK_FLAG(out_rmap_flags, BATTR_RMAP_IPV4_NHOP_CHANGED)
	321	\|\| CHECK_FLAG(out_rmap_flags,
	322	BATTR_RMAP_IPV6_GLOBAL_NHOP_CHANGED)
	323	\|\| CHECK_FLAG(out_rmap_flags,
	324	BATTR_RMAP_IPV6_PREFER_GLOBAL_CHANGED)
	325	\|\| CHECK_FLAG(out_rmap_flags, BATTR_RMAP_IPV6_LL_NHOP_CHANGED)
	326	\|\| CHECK_FLAG(in_rmap_flags, BATTR_RMAP_NEXTHOP_UNCHANGED))
	327	? 1
	328	: 0);
3811f1e2 DS	329	}
3811f1e2 DS	330
d62a17ae	331	static inline u_int32_t mac_mobility_seqnum(struct attr *attr)
128ea8ab	332	{
d62a17ae	333	return (attr) ? attr->mm_seqnum : 0;
128ea8ab	334	}
128ea8ab	335
00d252cb	336	#endif /* _QUAGGA_BGP_ATTR_H */