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