1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * Copyright (C) 1998 Kunihiro Ishiguro
7 #ifndef _ZEBRA_PREFIX_H
8 #define _ZEBRA_PREFIX_H
11 #include <net/ethernet.h>
13 #include <netinet/if_ether.h>
15 #include "sockunion.h"
27 /* EVPN route types. */
29 BGP_EVPN_AD_ROUTE
= 1, /* Ethernet Auto-Discovery (A-D) route */
30 BGP_EVPN_MAC_IP_ROUTE
, /* MAC/IP Advertisement route */
31 BGP_EVPN_IMET_ROUTE
, /* Inclusive Multicast Ethernet Tag route */
32 BGP_EVPN_ES_ROUTE
, /* Ethernet Segment route */
33 BGP_EVPN_IP_PREFIX_ROUTE
, /* IP Prefix route */
34 } bgp_evpn_route_type
;
36 /* value of first byte of ESI */
37 #define ESI_TYPE_ARBITRARY 0 /* */
38 #define ESI_TYPE_LACP 1 /* <> */
39 #define ESI_TYPE_BRIDGE 2 /* <Root bridge Mac-6B>:<Root Br Priority-2B>:00 */
40 #define ESI_TYPE_MAC 3 /* <Syst Mac Add-6B>:<Local Discriminator Value-3B> */
41 #define ESI_TYPE_ROUTER 4 /* <RouterId-4B>:<Local Discriminator Value-4B> */
42 #define ESI_TYPE_AS 5 /* <AS-4B>:<Local Discriminator Value-4B> */
44 #define MAX_ESI {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}
47 #define EVPN_ETH_TAG_BYTES 4
49 #define ESI_STR_LEN (3 * ESI_BYTES)
50 #define EVPN_DF_ALG_STR_LEN 24
52 /* Maximum number of VTEPs per-ES -
53 * XXX - temporary limit for allocating strings etc.
55 #define ES_VTEP_MAX_CNT 10
56 #define ES_VTEP_LIST_STR_SZ (ES_VTEP_MAX_CNT * 16)
58 #define ETHER_ADDR_STRLEN (3*ETH_ALEN)
60 * there isn't a portable ethernet address type. We define our
61 * own to simplify internal handling
64 uint8_t octet
[ETH_ALEN
];
65 } __attribute__((packed
));
68 /* length is the number of valuable bits of prefix structure
69 * 18 bytes is current length in structure, if address is ipv4
70 * 30 bytes is in case of ipv6
72 #define PREFIX_LEN_ROUTE_TYPE_5_IPV4 (18*8)
73 #define PREFIX_LEN_ROUTE_TYPE_5_IPV6 (30*8)
75 typedef struct esi_t_
{
76 uint8_t val
[ESI_BYTES
];
79 struct evpn_ead_addr
{
86 struct evpn_macip_addr
{
88 uint8_t ip_prefix_length
;
93 struct evpn_imet_addr
{
95 uint8_t ip_prefix_length
;
101 uint8_t ip_prefix_length
;
105 struct evpn_prefix_addr
{
107 uint8_t ip_prefix_length
;
111 /* EVPN address (RFC 7432) */
115 struct evpn_ead_addr _ead_addr
;
116 struct evpn_macip_addr _macip_addr
;
117 struct evpn_imet_addr _imet_addr
;
118 struct evpn_es_addr _es_addr
;
119 struct evpn_prefix_addr _prefix_addr
;
121 #define ead_addr u._ead_addr
122 #define macip_addr u._macip_addr
123 #define imet_addr u._imet_addr
124 #define es_addr u._es_addr
125 #define prefix_addr u._prefix_addr
129 * A struct prefix contains an address family, a prefix length, and an
130 * address. This can represent either a 'network prefix' as defined
131 * by CIDR, where the 'host bits' of the prefix are 0
132 * (e.g. AF_INET:10.0.0.0/8), or an address and netmask
133 * (e.g. AF_INET:10.0.0.9/8), such as might be configured on an
137 /* different OSes use different names */
138 #if defined(AF_PACKET)
139 #define AF_ETHERNET AF_PACKET
142 #define AF_ETHERNET AF_LINK
146 /* The 'family' in the prefix structure is internal to FRR and need not
147 * map to standard OS AF_ definitions except where needed for interacting
148 * with the kernel. However, AF_ definitions are currently in use and
149 * prevalent across the code. Define a new FRR-specific AF for EVPN to
150 * distinguish between 'ethernet' (MAC-only) and 'evpn' prefixes and
151 * ensure it does not conflict with any OS AF_ definition.
153 #if !defined(AF_EVPN)
154 #define AF_EVPN (AF_MAX + 1)
157 #if !defined(AF_FLOWSPEC)
158 #define AF_FLOWSPEC (AF_MAX + 2)
161 struct flowspec_prefix
{
163 uint16_t prefixlen
; /* length in bytes */
167 /* FRR generic prefix structure. */
173 struct in_addr prefix4
;
174 struct in6_addr prefix6
;
177 struct in_addr adv_router
;
179 struct ethaddr prefix_eth
; /* AF_ETHERNET */
183 struct evpn_addr prefix_evpn
; /* AF_EVPN */
184 struct flowspec_prefix prefix_flowspec
; /* AF_FLOWSPEC */
185 } u
__attribute__((aligned(8)));
188 /* IPv4 prefix structure. */
192 struct in_addr prefix
__attribute__((aligned(8)));
195 /* IPv6 prefix structure. */
199 struct in6_addr prefix
__attribute__((aligned(8)));
205 struct in_addr id
__attribute__((aligned(8)));
206 struct in_addr adv_router
;
209 /* Prefix for routing distinguisher. */
213 uint8_t val
[8] __attribute__((aligned(8)));
216 /* Prefix for ethernet. */
220 struct ethaddr eth_addr
__attribute__((aligned(8))); /* AF_ETHERNET */
223 /* EVPN prefix structure. */
227 struct evpn_addr prefix
__attribute__((aligned(8)));
230 static inline int is_evpn_prefix_ipaddr_none(const struct prefix_evpn
*evp
)
232 if (evp
->prefix
.route_type
== BGP_EVPN_AD_ROUTE
)
233 return IS_IPADDR_NONE(&(evp
)->prefix
.ead_addr
.ip
);
234 if (evp
->prefix
.route_type
== BGP_EVPN_MAC_IP_ROUTE
)
235 return IS_IPADDR_NONE(&(evp
)->prefix
.macip_addr
.ip
);
236 if (evp
->prefix
.route_type
== BGP_EVPN_IMET_ROUTE
)
237 return IS_IPADDR_NONE(&(evp
)->prefix
.imet_addr
.ip
);
238 if (evp
->prefix
.route_type
== BGP_EVPN_ES_ROUTE
)
239 return IS_IPADDR_NONE(&(evp
)->prefix
.es_addr
.ip
);
240 if (evp
->prefix
.route_type
== BGP_EVPN_IP_PREFIX_ROUTE
)
241 return IS_IPADDR_NONE(&(evp
)->prefix
.prefix_addr
.ip
);
245 static inline int is_evpn_prefix_ipaddr_v4(const struct prefix_evpn
*evp
)
247 if (evp
->prefix
.route_type
== BGP_EVPN_AD_ROUTE
)
248 return IS_IPADDR_V4(&(evp
)->prefix
.ead_addr
.ip
);
249 if (evp
->prefix
.route_type
== BGP_EVPN_MAC_IP_ROUTE
)
250 return IS_IPADDR_V4(&(evp
)->prefix
.macip_addr
.ip
);
251 if (evp
->prefix
.route_type
== BGP_EVPN_IMET_ROUTE
)
252 return IS_IPADDR_V4(&(evp
)->prefix
.imet_addr
.ip
);
253 if (evp
->prefix
.route_type
== BGP_EVPN_ES_ROUTE
)
254 return IS_IPADDR_V4(&(evp
)->prefix
.es_addr
.ip
);
255 if (evp
->prefix
.route_type
== BGP_EVPN_IP_PREFIX_ROUTE
)
256 return IS_IPADDR_V4(&(evp
)->prefix
.prefix_addr
.ip
);
260 static inline int is_evpn_prefix_ipaddr_v6(const struct prefix_evpn
*evp
)
262 if (evp
->prefix
.route_type
== BGP_EVPN_AD_ROUTE
)
263 return IS_IPADDR_V6(&(evp
)->prefix
.ead_addr
.ip
);
264 if (evp
->prefix
.route_type
== BGP_EVPN_MAC_IP_ROUTE
)
265 return IS_IPADDR_V6(&(evp
)->prefix
.macip_addr
.ip
);
266 if (evp
->prefix
.route_type
== BGP_EVPN_IMET_ROUTE
)
267 return IS_IPADDR_V6(&(evp
)->prefix
.imet_addr
.ip
);
268 if (evp
->prefix
.route_type
== BGP_EVPN_ES_ROUTE
)
269 return IS_IPADDR_V6(&(evp
)->prefix
.es_addr
.ip
);
270 if (evp
->prefix
.route_type
== BGP_EVPN_IP_PREFIX_ROUTE
)
271 return IS_IPADDR_V6(&(evp
)->prefix
.prefix_addr
.ip
);
275 /* Prefix for a Flowspec entry */
278 uint16_t prefixlen
; /* unused */
279 struct flowspec_prefix prefix
__attribute__((aligned(8)));
285 struct in_addr src
__attribute__((aligned(8)));
290 prefixtype(prefixptr
, struct prefix
, p
)
291 prefixtype(prefixptr
, struct prefix_ipv4
, p4
)
292 prefixtype(prefixptr
, struct prefix_ipv6
, p6
)
293 prefixtype(prefixptr
, struct prefix_evpn
, evp
)
294 prefixtype(prefixptr
, struct prefix_fs
, fs
)
295 prefixtype(prefixptr
, struct prefix_rd
, rd
)
298 union prefixconstptr
{
299 prefixtype(prefixconstptr
, const struct prefix
, p
)
300 prefixtype(prefixconstptr
, const struct prefix_ipv4
, p4
)
301 prefixtype(prefixconstptr
, const struct prefix_ipv6
, p6
)
302 prefixtype(prefixconstptr
, const struct prefix_evpn
, evp
)
303 prefixtype(prefixconstptr
, const struct prefix_fs
, fs
)
304 prefixtype(prefixconstptr
, const struct prefix_rd
, rd
)
307 #ifndef INET_ADDRSTRLEN
308 #define INET_ADDRSTRLEN 16
309 #endif /* INET_ADDRSTRLEN */
311 #ifndef INET6_ADDRSTRLEN
312 /* dead:beef:dead:beef:dead:beef:dead:beef + \0 */
313 #define INET6_ADDRSTRLEN 46
314 #endif /* INET6_ADDRSTRLEN */
317 #define INET6_BUFSIZ 53
318 #endif /* INET6_BUFSIZ */
320 /* Maximum string length of the result of prefix2str */
321 #define PREFIX_STRLEN 80
324 * Longest possible length of a (S,G) string is 34 bytes
325 * 123.123.123.123 = 15 * 2
327 * NULL Character at end = 1
328 * (123.123.123.123,123.123.123.123)
330 #define PREFIX_SG_STR_LEN 34
332 /* Max bit/byte length of IPv4 address. */
333 #define IPV4_MAX_BYTELEN 4
334 #define IPV4_MAX_BITLEN 32
335 #define IPV4_ADDR_CMP(D,S) memcmp ((D), (S), IPV4_MAX_BYTELEN)
337 static inline bool ipv4_addr_same(const struct in_addr
*a
,
338 const struct in_addr
*b
)
340 return (a
->s_addr
== b
->s_addr
);
342 #define IPV4_ADDR_SAME(A,B) ipv4_addr_same((A), (B))
344 static inline void ipv4_addr_copy(struct in_addr
*dst
,
345 const struct in_addr
*src
)
347 dst
->s_addr
= src
->s_addr
;
349 #define IPV4_ADDR_COPY(D,S) ipv4_addr_copy((D), (S))
351 #define IPV4_NET0(a) ((((uint32_t)(a)) & 0xff000000) == 0x00000000)
352 #define IPV4_NET127(a) ((((uint32_t)(a)) & 0xff000000) == 0x7f000000)
353 #define IPV4_LINKLOCAL(a) ((((uint32_t)(a)) & 0xffff0000) == 0xa9fe0000)
354 #define IPV4_CLASS_D(a) ((((uint32_t)(a)) & 0xf0000000) == 0xe0000000)
355 #define IPV4_CLASS_E(a) ((((uint32_t)(a)) & 0xf0000000) == 0xf0000000)
356 #define IPV4_CLASS_DE(a) ((((uint32_t)(a)) & 0xe0000000) == 0xe0000000)
357 #define IPV4_MC_LINKLOCAL(a) ((((uint32_t)(a)) & 0xffffff00) == 0xe0000000)
359 /* Max bit/byte length of IPv6 address. */
360 #define IPV6_MAX_BYTELEN 16
361 #define IPV6_MAX_BITLEN 128
362 #define IPV6_ADDR_CMP(D,S) memcmp ((D), (S), IPV6_MAX_BYTELEN)
363 #define IPV6_ADDR_SAME(D,S) (memcmp ((D), (S), IPV6_MAX_BYTELEN) == 0)
364 #define IPV6_ADDR_COPY(D,S) memcpy ((D), (S), IPV6_MAX_BYTELEN)
366 /* Count prefix size from mask length */
367 #define PSIZE(a) (((a) + 7) / (8))
369 #define BSIZE(a) ((a) * (8))
371 /* Prefix's family member. */
372 #define PREFIX_FAMILY(p) ((p)->family)
374 /* glibc defines s6_addr32 to __in6_u.__u6_addr32 if __USE_{MISC || GNU} */
376 #define s6_addr32 __u6_addr.__u6_addr32
380 extern int str2family(const char *);
381 extern int afi2family(afi_t
);
382 extern afi_t
family2afi(int);
383 extern const char *family2str(int family
);
384 extern const char *safi2str(safi_t safi
);
385 extern const char *afi2str(afi_t afi
);
386 extern const char *afi2str_lower(afi_t afi
);
388 static inline afi_t
prefix_afi(union prefixconstptr pu
)
390 return family2afi(pu
.p
->family
);
394 * Check bit of the prefix.
400 * which bit to fetch from byte buffer, 0 indexed.
402 extern unsigned int prefix_bit(const uint8_t *prefix
, const uint16_t bit_index
);
404 extern struct prefix
*prefix_new(void);
405 extern void prefix_free(struct prefix
**p
);
407 * Function to handle prefix_free being used as a del function.
409 extern void prefix_free_lists(void *arg
);
410 extern const char *prefix_family_str(union prefixconstptr pu
);
411 extern int prefix_blen(union prefixconstptr pu
);
412 extern int str2prefix(const char *, struct prefix
*);
414 #define PREFIX2STR_BUFFER PREFIX_STRLEN
416 extern void prefix_mcast_inet4_dump(const char *onfail
, struct in_addr addr
,
417 char *buf
, int buf_size
);
418 extern const char *prefix_sg2str(const struct prefix_sg
*sg
, char *str
);
419 extern const char *prefix2str(union prefixconstptr
, char *, int);
420 extern int evpn_type5_prefix_match(const struct prefix
*evpn_pfx
,
421 const struct prefix
*match_pfx
);
422 extern int prefix_match(union prefixconstptr unet
, union prefixconstptr upfx
);
423 extern int prefix_match_network_statement(union prefixconstptr unet
,
424 union prefixconstptr upfx
);
425 extern int prefix_same(union prefixconstptr ua
, union prefixconstptr ub
);
426 extern int prefix_cmp(union prefixconstptr ua
, union prefixconstptr ub
);
427 extern int prefix_common_bits(union prefixconstptr ua
, union prefixconstptr ub
);
428 extern void prefix_copy(union prefixptr udst
, union prefixconstptr usrc
);
429 extern void apply_mask(union prefixptr pu
);
431 #ifdef __clang_analyzer__
432 /* clang-SA doesn't understand transparent unions, making it think that the
433 * target of prefix_copy is uninitialized. So just memset the target.
434 * cf. https://bugs.llvm.org/show_bug.cgi?id=42811
436 #define prefix_copy(a, b) ({ memset(a, 0, sizeof(*a)); prefix_copy(a, b); })
439 extern struct prefix
*sockunion2hostprefix(const union sockunion
*,
441 extern void prefix2sockunion(const struct prefix
*, union sockunion
*);
443 extern int str2prefix_eth(const char *, struct prefix_eth
*);
445 extern struct prefix_ipv4
*prefix_ipv4_new(void);
446 extern void prefix_ipv4_free(struct prefix_ipv4
**p
);
447 extern int str2prefix_ipv4(const char *, struct prefix_ipv4
*);
448 extern void apply_mask_ipv4(struct prefix_ipv4
*);
450 extern int prefix_ipv4_any(const struct prefix_ipv4
*);
451 extern void apply_classful_mask_ipv4(struct prefix_ipv4
*);
453 extern uint8_t ip_masklen(struct in_addr
);
454 extern void masklen2ip(const int, struct in_addr
*);
455 /* given the address of a host on a network and the network mask length,
456 * calculate the broadcast address for that network;
457 * special treatment for /31 according to RFC3021 section 3.3 */
458 extern in_addr_t
ipv4_broadcast_addr(in_addr_t hostaddr
, int masklen
);
460 extern int netmask_str2prefix_str(const char *, const char *, char *, size_t);
462 extern struct prefix_ipv6
*prefix_ipv6_new(void);
463 extern void prefix_ipv6_free(struct prefix_ipv6
**p
);
464 extern int str2prefix_ipv6(const char *, struct prefix_ipv6
*);
465 extern void apply_mask_ipv6(struct prefix_ipv6
*);
467 extern int ip6_masklen(struct in6_addr
);
468 extern void masklen2ip6(const int, struct in6_addr
*);
470 extern int is_zero_mac(const struct ethaddr
*mac
);
471 extern bool is_mcast_mac(const struct ethaddr
*mac
);
472 extern bool is_bcast_mac(const struct ethaddr
*mac
);
473 extern int prefix_str2mac(const char *str
, struct ethaddr
*mac
);
474 extern char *prefix_mac2str(const struct ethaddr
*mac
, char *buf
, int size
);
476 extern unsigned prefix_hash_key(const void *pp
);
478 extern int str_to_esi(const char *str
, esi_t
*esi
);
479 extern char *esi_to_str(const esi_t
*esi
, char *buf
, int size
);
480 extern char *evpn_es_df_alg2str(uint8_t df_alg
, char *buf
, int buf_len
);
481 extern void prefix_evpn_hexdump(const struct prefix_evpn
*p
);
482 extern bool ipv4_unicast_valid(const struct in_addr
*addr
);
483 extern int evpn_prefix2prefix(const struct prefix
*evpn
, struct prefix
*to
);
485 static inline int ipv6_martian(const struct in6_addr
*addr
)
487 struct in6_addr localhost_addr
;
489 inet_pton(AF_INET6
, "::1", &localhost_addr
);
491 if (IPV6_ADDR_SAME(&localhost_addr
, addr
))
497 extern int macstr2prefix_evpn(const char *str
, struct prefix_evpn
*p
);
499 /* NOTE: This routine expects the address argument in network byte order. */
500 static inline bool ipv4_martian(const struct in_addr
*addr
)
502 if (!ipv4_unicast_valid(addr
))
507 static inline bool is_default_prefix4(const struct prefix_ipv4
*p
)
509 return p
&& p
->family
== AF_INET
&& p
->prefixlen
== 0
510 && p
->prefix
.s_addr
== INADDR_ANY
;
513 static inline bool is_default_prefix6(const struct prefix_ipv6
*p
)
515 return p
&& p
->family
== AF_INET6
&& p
->prefixlen
== 0
516 && memcmp(&p
->prefix
, &in6addr_any
, sizeof(struct in6_addr
))
520 static inline bool is_default_prefix(const struct prefix
*p
)
527 return is_default_prefix4((const struct prefix_ipv4
*)p
);
529 return is_default_prefix6((const struct prefix_ipv6
*)p
);
535 static inline int is_host_route(const struct prefix
*p
)
537 if (p
->family
== AF_INET
)
538 return (p
->prefixlen
== IPV4_MAX_BITLEN
);
539 else if (p
->family
== AF_INET6
)
540 return (p
->prefixlen
== IPV6_MAX_BITLEN
);
544 static inline int is_default_host_route(const struct prefix
*p
)
546 if (p
->family
== AF_INET
) {
547 return (p
->u
.prefix4
.s_addr
== INADDR_ANY
&&
548 p
->prefixlen
== IPV4_MAX_BITLEN
);
549 } else if (p
->family
== AF_INET6
) {
550 return ((!memcmp(&p
->u
.prefix6
, &in6addr_any
,
551 sizeof(struct in6_addr
))) &&
552 p
->prefixlen
== IPV6_MAX_BITLEN
);
557 static inline bool is_ipv6_global_unicast(const struct in6_addr
*p
)
559 if (IN6_IS_ADDR_UNSPECIFIED(p
) || IN6_IS_ADDR_LOOPBACK(p
) ||
560 IN6_IS_ADDR_LINKLOCAL(p
) || IN6_IS_ADDR_MULTICAST(p
))
566 /* IPv6 scope values, usable for IPv4 too (cf. below) */
567 /* clang-format off */
570 MCAST_SCOPE_IFACE
= 0x1,
571 MCAST_SCOPE_LINK
= 0x2,
572 MCAST_SCOPE_REALM
= 0x3,
573 MCAST_SCOPE_ADMIN
= 0x4,
574 MCAST_SCOPE_SITE
= 0x5,
575 /* 6-7: unassigned */
576 MCAST_SCOPE_ORG
= 0x8,
577 /* 9-d: unassigned */
578 MCAST_SCOPE_GLOBAL
= 0xe,
581 /* clang-format on */
583 static inline uint8_t ipv6_mcast_scope(const struct in6_addr
*addr
)
585 return addr
->s6_addr
[1] & 0xf;
588 static inline bool ipv6_mcast_nofwd(const struct in6_addr
*addr
)
590 return (addr
->s6_addr
[1] & 0xf) <= MCAST_SCOPE_LINK
;
593 static inline bool ipv6_mcast_ssm(const struct in6_addr
*addr
)
595 uint32_t bits
= ntohl(addr
->s6_addr32
[0]);
598 return (bits
& 0xfff0ffff) == 0xff300000;
601 static inline bool ipv6_mcast_reserved(const struct in6_addr
*addr
)
603 uint32_t bits
= ntohl(addr
->s6_addr32
[0]);
606 return (bits
& 0xff0fffff) == 0xff020000;
609 static inline uint8_t ipv4_mcast_scope(const struct in_addr
*addr
)
611 uint32_t bits
= ntohl(addr
->s_addr
);
613 /* 224.0.0.0/24 - link scope */
614 if ((bits
& 0xffffff00) == 0xe0000000)
615 return MCAST_SCOPE_LINK
;
616 /* 239.0.0.0/8 - org scope */
617 if ((bits
& 0xff000000) == 0xef000000)
618 return MCAST_SCOPE_ORG
;
620 return MCAST_SCOPE_GLOBAL
;
623 static inline bool ipv4_mcast_nofwd(const struct in_addr
*addr
)
625 uint32_t bits
= ntohl(addr
->s_addr
);
628 return (bits
& 0xffffff00) == 0xe0000000;
631 static inline bool ipv4_mcast_ssm(const struct in_addr
*addr
)
633 uint32_t bits
= ntohl(addr
->s_addr
);
636 return (bits
& 0xff000000) == 0xe8000000;
639 #ifdef _FRR_ATTRIBUTE_PRINTFRR
640 #pragma FRR printfrr_ext "%pEA" (struct ethaddr *)
642 #pragma FRR printfrr_ext "%pI4" (struct in_addr *)
643 #pragma FRR printfrr_ext "%pI4" (in_addr_t *)
645 #pragma FRR printfrr_ext "%pI6" (struct in6_addr *)
647 #pragma FRR printfrr_ext "%pFX" (struct prefix *)
648 #pragma FRR printfrr_ext "%pFX" (struct prefix_ipv4 *)
649 #pragma FRR printfrr_ext "%pFX" (struct prefix_ipv6 *)
650 #pragma FRR printfrr_ext "%pFX" (struct prefix_eth *)
651 #pragma FRR printfrr_ext "%pFX" (struct prefix_evpn *)
652 #pragma FRR printfrr_ext "%pFX" (struct prefix_fs *)
653 #pragma FRR printfrr_ext "%pRDP" (struct prefix_rd *)
654 /* RD with AS4B with dot and dot+ format */
655 #pragma FRR printfrr_ext "%pRDD" (struct prefix_rd *)
656 #pragma FRR printfrr_ext "%pRDE" (struct prefix_rd *)
658 #pragma FRR printfrr_ext "%pPSG4" (struct prefix_sg *)
665 #endif /* _ZEBRA_PREFIX_H */