lib/prefix.h

   1 /*
   2  * Prefix structure.
   3  * Copyright (C) 1998 Kunihiro Ishiguro
   4  *
   5  * This file is part of GNU Zebra.
   6  *
   7  * GNU Zebra is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2, or (at your option) any
  10  * later version.
  11  *
  12  * GNU Zebra is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; see the file COPYING; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #ifndef _ZEBRA_PREFIX_H
  23 #define _ZEBRA_PREFIX_H
  24
  25 #ifdef SUNOS_5
  26 #include <sys/ethernet.h>
  27 #else
  28 #ifdef GNU_LINUX
  29 #include <net/ethernet.h>
  30 #else
  31 #include <netinet/if_ether.h>
  32 #endif
  33 #endif
  34 #include "sockunion.h"
  35 #include "ipaddr.h"
  36 #include "compiler.h"
  37
  38 #ifdef __cplusplus
  39 extern "C" {
  40 #endif
  41
  42 #ifndef ETH_ALEN
  43 #define ETH_ALEN 6
  44 #endif
  45
  46 /* value of first byte of ESI */
  47 #define ESI_TYPE_ARBITRARY 0  /* */
  48 #define ESI_TYPE_LACP      1  /* <> */
  49 #define ESI_TYPE_BRIDGE    2  /* <Root bridge Mac-6B>:<Root Br Priority-2B>:00 */
  50 #define ESI_TYPE_MAC       3  /* <Syst Mac Add-6B>:<Local Discriminator Value-3B> */
  51 #define ESI_TYPE_ROUTER    4  /* <RouterId-4B>:<Local Discriminator Value-4B> */
  52 #define ESI_TYPE_AS        5  /* <AS-4B>:<Local Discriminator Value-4B> */
  53
  54 #define MAX_ESI {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}
  55
  56
  57 #define EVPN_ETH_TAG_BYTES 4
  58 #define ESI_BYTES 10
  59 #define ESI_STR_LEN (3 * ESI_BYTES)
  60
  61 /* Maximum number of VTEPs per-ES -
  62  * XXX - temporary limit for allocating strings etc.
  63  */
  64 #define ES_VTEP_MAX_CNT 10
  65 #define ES_VTEP_LIST_STR_SZ (ES_VTEP_MAX_CNT * 16)
  66
  67 #define ETHER_ADDR_STRLEN (3*ETH_ALEN)
  68 /*
  69  * there isn't a portable ethernet address type. We define our
  70  * own to simplify internal handling
  71  */
  72 struct ethaddr {
  73         uint8_t octet[ETH_ALEN];
  74 } __attribute__((packed));
  75
  76
  77 /* length is the number of valuable bits of prefix structure
  78 * 18 bytes is current length in structure, if address is ipv4
  79 * 30 bytes is in case of ipv6
  80 */
  81 #define PREFIX_LEN_ROUTE_TYPE_5_IPV4 (18*8)
  82 #define PREFIX_LEN_ROUTE_TYPE_5_IPV6 (30*8)
  83
  84 typedef struct esi_t_ {
  85         uint8_t val[ESI_BYTES];
  86 } esi_t;
  87
  88 struct evpn_ead_addr {
  89         esi_t esi;
  90         uint32_t eth_tag;
  91         struct ipaddr ip;
  92 };
  93
  94 struct evpn_macip_addr {
  95         uint32_t eth_tag;
  96         uint8_t ip_prefix_length;
  97         struct ethaddr mac;
  98         struct ipaddr ip;
  99 };
 100
 101 struct evpn_imet_addr {
 102         uint32_t eth_tag;
 103         uint8_t ip_prefix_length;
 104         struct ipaddr ip;
 105 };
 106
 107 struct evpn_es_addr {
 108         esi_t esi;
 109         uint8_t ip_prefix_length;
 110         struct ipaddr ip;
 111 };
 112
 113 struct evpn_prefix_addr {
 114         uint32_t eth_tag;
 115         uint8_t ip_prefix_length;
 116         struct ipaddr ip;
 117 };
 118
 119 /* EVPN address (RFC 7432) */
 120 struct evpn_addr {
 121         uint8_t route_type;
 122         union {
 123                 struct evpn_ead_addr _ead_addr;
 124                 struct evpn_macip_addr _macip_addr;
 125                 struct evpn_imet_addr _imet_addr;
 126                 struct evpn_es_addr _es_addr;
 127                 struct evpn_prefix_addr _prefix_addr;
 128         } u;
 129 #define ead_addr u._ead_addr
 130 #define macip_addr u._macip_addr
 131 #define imet_addr u._imet_addr
 132 #define es_addr u._es_addr
 133 #define prefix_addr u._prefix_addr
 134 };
 135
 136 /*
 137  * A struct prefix contains an address family, a prefix length, and an
 138  * address.  This can represent either a 'network prefix' as defined
 139  * by CIDR, where the 'host bits' of the prefix are 0
 140  * (e.g. AF_INET:10.0.0.0/8), or an address and netmask
 141  * (e.g. AF_INET:10.0.0.9/8), such as might be configured on an
 142  * interface.
 143  */
 144
 145 /* different OSes use different names */
 146 #if defined(AF_PACKET)
 147 #define AF_ETHERNET AF_PACKET
 148 #else
 149 #if defined(AF_LINK)
 150 #define AF_ETHERNET AF_LINK
 151 #endif
 152 #endif
 153
 154 /* The 'family' in the prefix structure is internal to FRR and need not
 155  * map to standard OS AF_ definitions except where needed for interacting
 156  * with the kernel. However, AF_ definitions are currently in use and
 157  * prevalent across the code. Define a new FRR-specific AF for EVPN to
 158  * distinguish between 'ethernet' (MAC-only) and 'evpn' prefixes and
 159  * ensure it does not conflict with any OS AF_ definition.
 160  */
 161 #if !defined(AF_EVPN)
 162 #define AF_EVPN (AF_MAX + 1)
 163 #endif
 164
 165 #if !defined(AF_FLOWSPEC)
 166 #define AF_FLOWSPEC (AF_MAX + 2)
 167 #endif
 168
 169 struct flowspec_prefix {
 170         uint16_t prefixlen; /* length in bytes */
 171         uintptr_t ptr;
 172 };
 173
 174 /* FRR generic prefix structure. */
 175 struct prefix {
 176         uint8_t family;
 177         uint16_t prefixlen;
 178         union {
 179                 uint8_t prefix;
 180                 struct in_addr prefix4;
 181                 struct in6_addr prefix6;
 182                 struct {
 183                         struct in_addr id;
 184                         struct in_addr adv_router;
 185                 } lp;
 186                 struct ethaddr prefix_eth; /* AF_ETHERNET */
 187                 uint8_t val[16];
 188                 uint32_t val32[4];
 189                 uintptr_t ptr;
 190                 struct evpn_addr prefix_evpn; /* AF_EVPN */
 191                 struct flowspec_prefix prefix_flowspec; /* AF_FLOWSPEC */
 192         } u __attribute__((aligned(8)));
 193 };
 194
 195 /* IPv4 prefix structure. */
 196 struct prefix_ipv4 {
 197         uint8_t family;
 198         uint16_t prefixlen;
 199         struct in_addr prefix __attribute__((aligned(8)));
 200 };
 201
 202 /* IPv6 prefix structure. */
 203 struct prefix_ipv6 {
 204         uint8_t family;
 205         uint16_t prefixlen;
 206         struct in6_addr prefix __attribute__((aligned(8)));
 207 };
 208
 209 struct prefix_ls {
 210         uint8_t family;
 211         uint16_t prefixlen;
 212         struct in_addr id __attribute__((aligned(8)));
 213         struct in_addr adv_router;
 214 };
 215
 216 /* Prefix for routing distinguisher. */
 217 struct prefix_rd {
 218         uint8_t family;
 219         uint16_t prefixlen;
 220         uint8_t val[8] __attribute__((aligned(8)));
 221 };
 222
 223 /* Prefix for ethernet. */
 224 struct prefix_eth {
 225         uint8_t family;
 226         uint16_t prefixlen;
 227         struct ethaddr eth_addr __attribute__((aligned(8))); /* AF_ETHERNET */
 228 };
 229
 230 /* EVPN prefix structure. */
 231 struct prefix_evpn {
 232         uint8_t family;
 233         uint16_t prefixlen;
 234         struct evpn_addr prefix __attribute__((aligned(8)));
 235 };
 236
 237 static inline int is_evpn_prefix_ipaddr_none(const struct prefix_evpn *evp)
 238 {
 239         if (evp->prefix.route_type == 1)
 240                 return IS_IPADDR_NONE(&(evp)->prefix.ead_addr.ip);
 241         if (evp->prefix.route_type == 2)
 242                 return IS_IPADDR_NONE(&(evp)->prefix.macip_addr.ip);
 243         if (evp->prefix.route_type == 3)
 244                 return IS_IPADDR_NONE(&(evp)->prefix.imet_addr.ip);
 245         if (evp->prefix.route_type == 4)
 246                 return IS_IPADDR_NONE(&(evp)->prefix.es_addr.ip);
 247         if (evp->prefix.route_type == 5)
 248                 return IS_IPADDR_NONE(&(evp)->prefix.prefix_addr.ip);
 249         return 0;
 250 }
 251
 252 static inline int is_evpn_prefix_ipaddr_v4(const struct prefix_evpn *evp)
 253 {
 254         if (evp->prefix.route_type == 1)
 255                 return IS_IPADDR_V4(&(evp)->prefix.ead_addr.ip);
 256         if (evp->prefix.route_type == 2)
 257                 return IS_IPADDR_V4(&(evp)->prefix.macip_addr.ip);
 258         if (evp->prefix.route_type == 3)
 259                 return IS_IPADDR_V4(&(evp)->prefix.imet_addr.ip);
 260         if (evp->prefix.route_type == 4)
 261                 return IS_IPADDR_V4(&(evp)->prefix.es_addr.ip);
 262         if (evp->prefix.route_type == 5)
 263                 return IS_IPADDR_V4(&(evp)->prefix.prefix_addr.ip);
 264         return 0;
 265 }
 266
 267 static inline int is_evpn_prefix_ipaddr_v6(const struct prefix_evpn *evp)
 268 {
 269         if (evp->prefix.route_type == 1)
 270                 return IS_IPADDR_V6(&(evp)->prefix.ead_addr.ip);
 271         if (evp->prefix.route_type == 2)
 272                 return IS_IPADDR_V6(&(evp)->prefix.macip_addr.ip);
 273         if (evp->prefix.route_type == 3)
 274                 return IS_IPADDR_V6(&(evp)->prefix.imet_addr.ip);
 275         if (evp->prefix.route_type == 4)
 276                 return IS_IPADDR_V6(&(evp)->prefix.es_addr.ip);
 277         if (evp->prefix.route_type == 5)
 278                 return IS_IPADDR_V6(&(evp)->prefix.prefix_addr.ip);
 279         return 0;
 280 }
 281
 282 /* Prefix for a generic pointer */
 283 struct prefix_ptr {
 284         uint8_t family;
 285         uint16_t prefixlen;
 286         uintptr_t prefix __attribute__((aligned(8)));
 287 };
 288
 289 /* Prefix for a Flowspec entry */
 290 struct prefix_fs {
 291         uint8_t family;
 292         uint16_t prefixlen; /* unused */
 293         struct flowspec_prefix  prefix __attribute__((aligned(8)));
 294 };
 295
 296 struct prefix_sg {
 297         uint8_t family;
 298         uint16_t prefixlen;
 299         struct in_addr src __attribute__((aligned(8)));
 300         struct in_addr grp;
 301 };
 302
 303 /* helper to get type safety/avoid casts on calls
 304  * (w/o this, functions accepting all prefix types need casts on the caller
 305  * side, which strips type safety since the cast will accept any pointer
 306  * type.)
 307  */
 308 #ifndef __cplusplus
 309 #define prefixtype(uname, typename, fieldname) \
 310         typename *fieldname;
 311 #else
 312 #define prefixtype(uname, typename, fieldname) \
 313         typename *fieldname; \
 314         uname(typename *x) { this->fieldname = x; }
 315 #endif
 316
 317 union prefixptr {
 318         prefixtype(prefixptr, struct prefix,      p)
 319         prefixtype(prefixptr, struct prefix_ipv4, p4)
 320         prefixtype(prefixptr, struct prefix_ipv6, p6)
 321         prefixtype(prefixptr, struct prefix_evpn, evp)
 322         prefixtype(prefixptr, struct prefix_fs,   fs)
 323         prefixtype(prefixptr, struct prefix_rd,   rd)
 324 } __attribute__((transparent_union));
 325
 326 union prefixconstptr {
 327         prefixtype(prefixconstptr, const struct prefix,      p)
 328         prefixtype(prefixconstptr, const struct prefix_ipv4, p4)
 329         prefixtype(prefixconstptr, const struct prefix_ipv6, p6)
 330         prefixtype(prefixconstptr, const struct prefix_evpn, evp)
 331         prefixtype(prefixconstptr, const struct prefix_fs,   fs)
 332         prefixtype(prefixconstptr, const struct prefix_rd,   rd)
 333 } __attribute__((transparent_union));
 334
 335 #ifndef INET_ADDRSTRLEN
 336 #define INET_ADDRSTRLEN 16
 337 #endif /* INET_ADDRSTRLEN */
 338
 339 #ifndef INET6_ADDRSTRLEN
 340 /* dead:beef:dead:beef:dead:beef:dead:beef + \0 */
 341 #define INET6_ADDRSTRLEN 46
 342 #endif /* INET6_ADDRSTRLEN */
 343
 344 #ifndef INET6_BUFSIZ
 345 #define INET6_BUFSIZ 53
 346 #endif /* INET6_BUFSIZ */
 347
 348 /* Maximum string length of the result of prefix2str */
 349 #define PREFIX_STRLEN 80
 350
 351 /*
 352  * Longest possible length of a (S,G) string is 36 bytes
 353  * 123.123.123.123 = 15 * 2
 354  * (,) = 3
 355  * NULL Character at end = 1
 356  * (123.123.123.123,123.123.123.123)
 357  */
 358 #define PREFIX_SG_STR_LEN 34
 359
 360 /* Max bit/byte length of IPv4 address. */
 361 #define IPV4_MAX_BYTELEN    4
 362 #define IPV4_MAX_BITLEN    32
 363 #define IPV4_MAX_PREFIXLEN 32
 364 #define IPV4_ADDR_CMP(D,S)   memcmp ((D), (S), IPV4_MAX_BYTELEN)
 365
 366 static inline bool ipv4_addr_same(const struct in_addr *a,
 367                                   const struct in_addr *b)
 368 {
 369         return (a->s_addr == b->s_addr);
 370 }
 371 #define IPV4_ADDR_SAME(A,B)  ipv4_addr_same((A), (B))
 372
 373 static inline void ipv4_addr_copy(struct in_addr *dst,
 374                                   const struct in_addr *src)
 375 {
 376         dst->s_addr = src->s_addr;
 377 }
 378 #define IPV4_ADDR_COPY(D,S)  ipv4_addr_copy((D), (S))
 379
 380 #define IPV4_NET0(a) ((((uint32_t)(a)) & 0xff000000) == 0x00000000)
 381 #define IPV4_NET127(a) ((((uint32_t)(a)) & 0xff000000) == 0x7f000000)
 382 #define IPV4_LINKLOCAL(a) ((((uint32_t)(a)) & 0xffff0000) == 0xa9fe0000)
 383 #define IPV4_CLASS_DE(a) ((((uint32_t)(a)) & 0xe0000000) == 0xe0000000)
 384 #define IPV4_MC_LINKLOCAL(a) ((((uint32_t)(a)) & 0xffffff00) == 0xe0000000)
 385
 386 /* Max bit/byte length of IPv6 address. */
 387 #define IPV6_MAX_BYTELEN    16
 388 #define IPV6_MAX_BITLEN    128
 389 #define IPV6_MAX_PREFIXLEN 128
 390 #define IPV6_ADDR_CMP(D,S)   memcmp ((D), (S), IPV6_MAX_BYTELEN)
 391 #define IPV6_ADDR_SAME(D,S)  (memcmp ((D), (S), IPV6_MAX_BYTELEN) == 0)
 392 #define IPV6_ADDR_COPY(D,S)  memcpy ((D), (S), IPV6_MAX_BYTELEN)
 393
 394 /* Count prefix size from mask length */
 395 #define PSIZE(a) (((a) + 7) / (8))
 396
 397 #define BSIZE(a) ((a) * (8))
 398
 399 /* Prefix's family member. */
 400 #define PREFIX_FAMILY(p)  ((p)->family)
 401
 402 /* glibc defines s6_addr32 to __in6_u.__u6_addr32 if __USE_{MISC || GNU} */
 403 #ifndef s6_addr32
 404 #if defined(SUNOS_5)
 405 /* Some SunOS define s6_addr32 only to kernel */
 406 #define s6_addr32 _S6_un._S6_u32
 407 #else
 408 #define s6_addr32 __u6_addr.__u6_addr32
 409 #endif /* SUNOS_5 */
 410 #endif /*s6_addr32*/
 411
 412 /* Prototypes. */
 413 extern int str2family(const char *);
 414 extern int afi2family(afi_t);
 415 extern afi_t family2afi(int);
 416 extern const char *family2str(int family);
 417 extern const char *safi2str(safi_t safi);
 418 extern const char *afi2str(afi_t afi);
 419
 420 /*
 421  * Check bit of the prefix.
 422  *
 423  * prefix
 424  *    byte buffer
 425  *
 426  * bit_index
 427  *    which bit to fetch from byte buffer, 0 indexed.
 428  */
 429 extern unsigned int prefix_bit(const uint8_t *prefix, const uint16_t bit_index);
 430
 431 extern struct prefix *prefix_new(void);
 432 extern void prefix_free(struct prefix **p);
 433 /*
 434  * Function to handle prefix_free being used as a del function.
 435  */
 436 extern void prefix_free_lists(void *arg);
 437 extern const char *prefix_family_str(const struct prefix *);
 438 extern int prefix_blen(const struct prefix *);
 439 extern int str2prefix(const char *, struct prefix *);
 440
 441 #define PREFIX2STR_BUFFER  PREFIX_STRLEN
 442
 443 extern void prefix_mcast_inet4_dump(const char *onfail, struct in_addr addr,
 444                                 char *buf, int buf_size);
 445 extern const char *prefix_sg2str(const struct prefix_sg *sg, char *str);
 446 extern const char *prefix2str(union prefixconstptr, char *, int);
 447 extern int evpn_type5_prefix_match(const struct prefix *evpn_pfx,
 448                                    const struct prefix *match_pfx);
 449 extern int prefix_match(const struct prefix *, const struct prefix *);
 450 extern int prefix_match_network_statement(const struct prefix *,
 451                                           const struct prefix *);
 452 extern int prefix_same(union prefixconstptr, union prefixconstptr);
 453 extern int prefix_cmp(union prefixconstptr, union prefixconstptr);
 454 extern int prefix_common_bits(const struct prefix *, const struct prefix *);
 455 extern void prefix_copy(union prefixptr, union prefixconstptr);
 456 extern void apply_mask(struct prefix *);
 457
 458 #ifdef __clang_analyzer__
 459 /* clang-SA doesn't understand transparent unions, making it think that the
 460  * target of prefix_copy is uninitialized.  So just memset the target.
 461  * cf. https://bugs.llvm.org/show_bug.cgi?id=42811
 462  */
 463 #define prefix_copy(a, b) ({ memset(a, 0, sizeof(*a)); prefix_copy(a, b); })
 464 #endif
 465
 466 extern struct prefix *sockunion2hostprefix(const union sockunion *,
 467                                            struct prefix *p);
 468 extern void prefix2sockunion(const struct prefix *, union sockunion *);
 469
 470 extern int str2prefix_eth(const char *, struct prefix_eth *);
 471
 472 extern struct prefix_ipv4 *prefix_ipv4_new(void);
 473 extern void prefix_ipv4_free(struct prefix_ipv4 **p);
 474 extern int str2prefix_ipv4(const char *, struct prefix_ipv4 *);
 475 extern void apply_mask_ipv4(struct prefix_ipv4 *);
 476
 477 #define PREFIX_COPY(DST, SRC)                                                  \
 478         *((struct prefix *)(DST)) = *((const struct prefix *)(SRC))
 479 #define PREFIX_COPY_IPV4(DST, SRC)                                             \
 480         *((struct prefix_ipv4 *)(DST)) = *((const struct prefix_ipv4 *)(SRC));
 481
 482 extern int prefix_ipv4_any(const struct prefix_ipv4 *);
 483 extern void apply_classful_mask_ipv4(struct prefix_ipv4 *);
 484
 485 extern uint8_t ip_masklen(struct in_addr);
 486 extern void masklen2ip(const int, struct in_addr *);
 487 /* given the address of a host on a network and the network mask length,
 488  * calculate the broadcast address for that network;
 489  * special treatment for /31 according to RFC3021 section 3.3 */
 490 extern in_addr_t ipv4_broadcast_addr(in_addr_t hostaddr, int masklen);
 491
 492 extern int netmask_str2prefix_str(const char *, const char *, char *);
 493
 494 extern struct prefix_ipv6 *prefix_ipv6_new(void);
 495 extern void prefix_ipv6_free(struct prefix_ipv6 **p);
 496 extern int str2prefix_ipv6(const char *, struct prefix_ipv6 *);
 497 extern void apply_mask_ipv6(struct prefix_ipv6 *);
 498
 499 #define PREFIX_COPY_IPV6(DST, SRC)                                             \
 500         *((struct prefix_ipv6 *)(DST)) = *((const struct prefix_ipv6 *)(SRC));
 501
 502 extern int ip6_masklen(struct in6_addr);
 503 extern void masklen2ip6(const int, struct in6_addr *);
 504
 505 extern const char *inet6_ntoa(struct in6_addr);
 506
 507 extern int is_zero_mac(const struct ethaddr *mac);
 508 extern bool is_mcast_mac(const struct ethaddr *mac);
 509 extern bool is_bcast_mac(const struct ethaddr *mac);
 510 extern int prefix_str2mac(const char *str, struct ethaddr *mac);
 511 extern char *prefix_mac2str(const struct ethaddr *mac, char *buf, int size);
 512
 513 extern unsigned prefix_hash_key(const void *pp);
 514
 515 extern int str_to_esi(const char *str, esi_t *esi);
 516 extern char *esi_to_str(const esi_t *esi, char *buf, int size);
 517 extern void prefix_evpn_hexdump(const struct prefix_evpn *p);
 518
 519 static inline int ipv6_martian(struct in6_addr *addr)
 520 {
 521         struct in6_addr localhost_addr;
 522
 523         inet_pton(AF_INET6, "::1", &localhost_addr);
 524
 525         if (IPV6_ADDR_SAME(&localhost_addr, addr))
 526                 return 1;
 527
 528         return 0;
 529 }
 530
 531 extern int macstr2prefix_evpn(const char *str, struct prefix_evpn *p);
 532
 533 /* NOTE: This routine expects the address argument in network byte order. */
 534 static inline int ipv4_martian(struct in_addr *addr)
 535 {
 536         in_addr_t ip = ntohl(addr->s_addr);
 537
 538         if (IPV4_NET0(ip) || IPV4_NET127(ip) || IPV4_CLASS_DE(ip)) {
 539                 return 1;
 540         }
 541         return 0;
 542 }
 543
 544 static inline int is_default_prefix(const struct prefix *p)
 545 {
 546         if (!p)
 547                 return 0;
 548
 549         if ((p->family == AF_INET) && (p->u.prefix4.s_addr == INADDR_ANY)
 550             && (p->prefixlen == 0))
 551                 return 1;
 552
 553         if ((p->family == AF_INET6) && (p->prefixlen == 0)
 554             && (!memcmp(&p->u.prefix6, &in6addr_any, sizeof(struct in6_addr))))
 555                 return 1;
 556
 557         return 0;
 558 }
 559
 560 static inline int is_host_route(const struct prefix *p)
 561 {
 562         if (p->family == AF_INET)
 563                 return (p->prefixlen == IPV4_MAX_BITLEN);
 564         else if (p->family == AF_INET6)
 565                 return (p->prefixlen == IPV6_MAX_BITLEN);
 566         return 0;
 567 }
 568
 569 static inline int is_default_host_route(const struct prefix *p)
 570 {
 571         if (p->family == AF_INET) {
 572                 return (p->u.prefix4.s_addr == INADDR_ANY &&
 573                         p->prefixlen == IPV4_MAX_BITLEN);
 574         } else if (p->family == AF_INET6) {
 575                 return ((!memcmp(&p->u.prefix6, &in6addr_any,
 576                                  sizeof(struct in6_addr))) &&
 577                         p->prefixlen == IPV6_MAX_BITLEN);
 578         }
 579         return 0;
 580 }
 581
 582 #ifdef _FRR_ATTRIBUTE_PRINTFRR
 583 #pragma FRR printfrr_ext "%pEA"  (struct ethaddr *)
 584
 585 #pragma FRR printfrr_ext "%pI4"  (struct in_addr *)
 586 #pragma FRR printfrr_ext "%pI4"  (in_addr_t *)
 587
 588 #pragma FRR printfrr_ext "%pI6"  (struct in6_addr *)
 589
 590 #pragma FRR printfrr_ext "%pFX"  (struct prefix *)
 591 #pragma FRR printfrr_ext "%pFX"  (struct prefix_ipv4 *)
 592 #pragma FRR printfrr_ext "%pFX"  (struct prefix_ipv6 *)
 593 #pragma FRR printfrr_ext "%pFX"  (struct prefix_eth *)
 594 #pragma FRR printfrr_ext "%pFX"  (struct prefix_evpn *)
 595 #pragma FRR printfrr_ext "%pFX"  (struct prefix_fs *)
 596
 597 #pragma FRR printfrr_ext "%pSG4" (struct prefix_sg *)
 598 #endif
 599
 600 #ifdef __cplusplus
 601 }
 602 #endif
 603
 604 #endif /* _ZEBRA_PREFIX_H */