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 #define EVPN_DF_ALG_STR_LEN 24
  66
  67 /* Maximum number of VTEPs per-ES -
  68  * XXX - temporary limit for allocating strings etc.
  69  */
  70 #define ES_VTEP_MAX_CNT 10
  71 #define ES_VTEP_LIST_STR_SZ (ES_VTEP_MAX_CNT * 16)
  72
  73 #define ETHER_ADDR_STRLEN (3*ETH_ALEN)
  74 /*
  75  * there isn't a portable ethernet address type. We define our
  76  * own to simplify internal handling
  77  */
  78 struct ethaddr {
  79         uint8_t octet[ETH_ALEN];
  80 } __attribute__((packed));
  81
  82
  83 /* length is the number of valuable bits of prefix structure
  84 * 18 bytes is current length in structure, if address is ipv4
  85 * 30 bytes is in case of ipv6
  86 */
  87 #define PREFIX_LEN_ROUTE_TYPE_5_IPV4 (18*8)
  88 #define PREFIX_LEN_ROUTE_TYPE_5_IPV6 (30*8)
  89
  90 typedef struct esi_t_ {
  91         uint8_t val[ESI_BYTES];
  92 } esi_t;
  93
  94 struct evpn_ead_addr {
  95         esi_t esi;
  96         uint32_t eth_tag;
  97         struct ipaddr ip;
  98 };
  99
 100 struct evpn_macip_addr {
 101         uint32_t eth_tag;
 102         uint8_t ip_prefix_length;
 103         struct ethaddr mac;
 104         struct ipaddr ip;
 105 };
 106
 107 struct evpn_imet_addr {
 108         uint32_t eth_tag;
 109         uint8_t ip_prefix_length;
 110         struct ipaddr ip;
 111 };
 112
 113 struct evpn_es_addr {
 114         esi_t esi;
 115         uint8_t ip_prefix_length;
 116         struct ipaddr ip;
 117 };
 118
 119 struct evpn_prefix_addr {
 120         uint32_t eth_tag;
 121         uint8_t ip_prefix_length;
 122         struct ipaddr ip;
 123 };
 124
 125 /* EVPN address (RFC 7432) */
 126 struct evpn_addr {
 127         uint8_t route_type;
 128         union {
 129                 struct evpn_ead_addr _ead_addr;
 130                 struct evpn_macip_addr _macip_addr;
 131                 struct evpn_imet_addr _imet_addr;
 132                 struct evpn_es_addr _es_addr;
 133                 struct evpn_prefix_addr _prefix_addr;
 134         } u;
 135 #define ead_addr u._ead_addr
 136 #define macip_addr u._macip_addr
 137 #define imet_addr u._imet_addr
 138 #define es_addr u._es_addr
 139 #define prefix_addr u._prefix_addr
 140 };
 141
 142 /*
 143  * A struct prefix contains an address family, a prefix length, and an
 144  * address.  This can represent either a 'network prefix' as defined
 145  * by CIDR, where the 'host bits' of the prefix are 0
 146  * (e.g. AF_INET:10.0.0.0/8), or an address and netmask
 147  * (e.g. AF_INET:10.0.0.9/8), such as might be configured on an
 148  * interface.
 149  */
 150
 151 /* different OSes use different names */
 152 #if defined(AF_PACKET)
 153 #define AF_ETHERNET AF_PACKET
 154 #else
 155 #if defined(AF_LINK)
 156 #define AF_ETHERNET AF_LINK
 157 #endif
 158 #endif
 159
 160 /* The 'family' in the prefix structure is internal to FRR and need not
 161  * map to standard OS AF_ definitions except where needed for interacting
 162  * with the kernel. However, AF_ definitions are currently in use and
 163  * prevalent across the code. Define a new FRR-specific AF for EVPN to
 164  * distinguish between 'ethernet' (MAC-only) and 'evpn' prefixes and
 165  * ensure it does not conflict with any OS AF_ definition.
 166  */
 167 #if !defined(AF_EVPN)
 168 #define AF_EVPN (AF_MAX + 1)
 169 #endif
 170
 171 #if !defined(AF_FLOWSPEC)
 172 #define AF_FLOWSPEC (AF_MAX + 2)
 173 #endif
 174
 175 struct flowspec_prefix {
 176         uint8_t family;
 177         uint16_t prefixlen; /* length in bytes */
 178         uintptr_t ptr;
 179 };
 180
 181 /* FRR generic prefix structure. */
 182 struct prefix {
 183         uint8_t family;
 184         uint16_t prefixlen;
 185         union {
 186                 uint8_t prefix;
 187                 struct in_addr prefix4;
 188                 struct in6_addr prefix6;
 189                 struct {
 190                         struct in_addr id;
 191                         struct in_addr adv_router;
 192                 } lp;
 193                 struct ethaddr prefix_eth; /* AF_ETHERNET */
 194                 uint8_t val[16];
 195                 uint32_t val32[4];
 196                 uintptr_t ptr;
 197                 struct evpn_addr prefix_evpn; /* AF_EVPN */
 198                 struct flowspec_prefix prefix_flowspec; /* AF_FLOWSPEC */
 199         } u __attribute__((aligned(8)));
 200 };
 201
 202 /* IPv4 prefix structure. */
 203 struct prefix_ipv4 {
 204         uint8_t family;
 205         uint16_t prefixlen;
 206         struct in_addr prefix __attribute__((aligned(8)));
 207 };
 208
 209 /* IPv6 prefix structure. */
 210 struct prefix_ipv6 {
 211         uint8_t family;
 212         uint16_t prefixlen;
 213         struct in6_addr prefix __attribute__((aligned(8)));
 214 };
 215
 216 struct prefix_ls {
 217         uint8_t family;
 218         uint16_t prefixlen;
 219         struct in_addr id __attribute__((aligned(8)));
 220         struct in_addr adv_router;
 221 };
 222
 223 /* Prefix for routing distinguisher. */
 224 struct prefix_rd {
 225         uint8_t family;
 226         uint16_t prefixlen;
 227         uint8_t val[8] __attribute__((aligned(8)));
 228 };
 229
 230 /* Prefix for ethernet. */
 231 struct prefix_eth {
 232         uint8_t family;
 233         uint16_t prefixlen;
 234         struct ethaddr eth_addr __attribute__((aligned(8))); /* AF_ETHERNET */
 235 };
 236
 237 /* EVPN prefix structure. */
 238 struct prefix_evpn {
 239         uint8_t family;
 240         uint16_t prefixlen;
 241         struct evpn_addr prefix __attribute__((aligned(8)));
 242 };
 243
 244 static inline int is_evpn_prefix_ipaddr_none(const struct prefix_evpn *evp)
 245 {
 246         if (evp->prefix.route_type == BGP_EVPN_AD_ROUTE)
 247                 return IS_IPADDR_NONE(&(evp)->prefix.ead_addr.ip);
 248         if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE)
 249                 return IS_IPADDR_NONE(&(evp)->prefix.macip_addr.ip);
 250         if (evp->prefix.route_type == BGP_EVPN_IMET_ROUTE)
 251                 return IS_IPADDR_NONE(&(evp)->prefix.imet_addr.ip);
 252         if (evp->prefix.route_type == BGP_EVPN_ES_ROUTE)
 253                 return IS_IPADDR_NONE(&(evp)->prefix.es_addr.ip);
 254         if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)
 255                 return IS_IPADDR_NONE(&(evp)->prefix.prefix_addr.ip);
 256         return 0;
 257 }
 258
 259 static inline int is_evpn_prefix_ipaddr_v4(const struct prefix_evpn *evp)
 260 {
 261         if (evp->prefix.route_type == BGP_EVPN_AD_ROUTE)
 262                 return IS_IPADDR_V4(&(evp)->prefix.ead_addr.ip);
 263         if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE)
 264                 return IS_IPADDR_V4(&(evp)->prefix.macip_addr.ip);
 265         if (evp->prefix.route_type == BGP_EVPN_IMET_ROUTE)
 266                 return IS_IPADDR_V4(&(evp)->prefix.imet_addr.ip);
 267         if (evp->prefix.route_type == BGP_EVPN_ES_ROUTE)
 268                 return IS_IPADDR_V4(&(evp)->prefix.es_addr.ip);
 269         if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)
 270                 return IS_IPADDR_V4(&(evp)->prefix.prefix_addr.ip);
 271         return 0;
 272 }
 273
 274 static inline int is_evpn_prefix_ipaddr_v6(const struct prefix_evpn *evp)
 275 {
 276         if (evp->prefix.route_type == BGP_EVPN_AD_ROUTE)
 277                 return IS_IPADDR_V6(&(evp)->prefix.ead_addr.ip);
 278         if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE)
 279                 return IS_IPADDR_V6(&(evp)->prefix.macip_addr.ip);
 280         if (evp->prefix.route_type == BGP_EVPN_IMET_ROUTE)
 281                 return IS_IPADDR_V6(&(evp)->prefix.imet_addr.ip);
 282         if (evp->prefix.route_type == BGP_EVPN_ES_ROUTE)
 283                 return IS_IPADDR_V6(&(evp)->prefix.es_addr.ip);
 284         if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)
 285                 return IS_IPADDR_V6(&(evp)->prefix.prefix_addr.ip);
 286         return 0;
 287 }
 288
 289 /* Prefix for a generic pointer */
 290 struct prefix_ptr {
 291         uint8_t family;
 292         uint16_t prefixlen;
 293         uintptr_t prefix __attribute__((aligned(8)));
 294 };
 295
 296 /* Prefix for a Flowspec entry */
 297 struct prefix_fs {
 298         uint8_t family;
 299         uint16_t prefixlen; /* unused */
 300         struct flowspec_prefix  prefix __attribute__((aligned(8)));
 301 };
 302
 303 struct prefix_sg {
 304         uint8_t family;
 305         uint16_t prefixlen;
 306         struct in_addr src __attribute__((aligned(8)));
 307         struct in_addr grp;
 308 };
 309
 310 /* helper to get type safety/avoid casts on calls
 311  * (w/o this, functions accepting all prefix types need casts on the caller
 312  * side, which strips type safety since the cast will accept any pointer
 313  * type.)
 314  */
 315 #ifndef __cplusplus
 316 #define prefixtype(uname, typename, fieldname) \
 317         typename *fieldname;
 318 #else
 319 #define prefixtype(uname, typename, fieldname) \
 320         typename *fieldname; \
 321         uname(typename *x) { this->fieldname = x; }
 322 #endif
 323
 324 union prefixptr {
 325         prefixtype(prefixptr, struct prefix,      p)
 326         prefixtype(prefixptr, struct prefix_ipv4, p4)
 327         prefixtype(prefixptr, struct prefix_ipv6, p6)
 328         prefixtype(prefixptr, struct prefix_evpn, evp)
 329         prefixtype(prefixptr, struct prefix_fs,   fs)
 330         prefixtype(prefixptr, struct prefix_rd,   rd)
 331 } __attribute__((transparent_union));
 332
 333 union prefixconstptr {
 334         prefixtype(prefixconstptr, const struct prefix,      p)
 335         prefixtype(prefixconstptr, const struct prefix_ipv4, p4)
 336         prefixtype(prefixconstptr, const struct prefix_ipv6, p6)
 337         prefixtype(prefixconstptr, const struct prefix_evpn, evp)
 338         prefixtype(prefixconstptr, const struct prefix_fs,   fs)
 339         prefixtype(prefixconstptr, const struct prefix_rd,   rd)
 340 } __attribute__((transparent_union));
 341
 342 #ifndef INET_ADDRSTRLEN
 343 #define INET_ADDRSTRLEN 16
 344 #endif /* INET_ADDRSTRLEN */
 345
 346 #ifndef INET6_ADDRSTRLEN
 347 /* dead:beef:dead:beef:dead:beef:dead:beef + \0 */
 348 #define INET6_ADDRSTRLEN 46
 349 #endif /* INET6_ADDRSTRLEN */
 350
 351 #ifndef INET6_BUFSIZ
 352 #define INET6_BUFSIZ 53
 353 #endif /* INET6_BUFSIZ */
 354
 355 /* Maximum string length of the result of prefix2str */
 356 #define PREFIX_STRLEN 80
 357
 358 /*
 359  * Longest possible length of a (S,G) string is 36 bytes
 360  * 123.123.123.123 = 15 * 2
 361  * (,) = 3
 362  * NULL Character at end = 1
 363  * (123.123.123.123,123.123.123.123)
 364  */
 365 #define PREFIX_SG_STR_LEN 34
 366
 367 /* Max bit/byte length of IPv4 address. */
 368 #define IPV4_MAX_BYTELEN    4
 369 #define IPV4_MAX_BITLEN    32
 370 #define IPV4_MAX_PREFIXLEN 32
 371 #define IPV4_ADDR_CMP(D,S)   memcmp ((D), (S), IPV4_MAX_BYTELEN)
 372
 373 static inline bool ipv4_addr_same(const struct in_addr *a,
 374                                   const struct in_addr *b)
 375 {
 376         return (a->s_addr == b->s_addr);
 377 }
 378 #define IPV4_ADDR_SAME(A,B)  ipv4_addr_same((A), (B))
 379
 380 static inline void ipv4_addr_copy(struct in_addr *dst,
 381                                   const struct in_addr *src)
 382 {
 383         dst->s_addr = src->s_addr;
 384 }
 385 #define IPV4_ADDR_COPY(D,S)  ipv4_addr_copy((D), (S))
 386
 387 #define IPV4_NET0(a) ((((uint32_t)(a)) & 0xff000000) == 0x00000000)
 388 #define IPV4_NET127(a) ((((uint32_t)(a)) & 0xff000000) == 0x7f000000)
 389 #define IPV4_LINKLOCAL(a) ((((uint32_t)(a)) & 0xffff0000) == 0xa9fe0000)
 390 #define IPV4_CLASS_DE(a) ((((uint32_t)(a)) & 0xe0000000) == 0xe0000000)
 391 #define IPV4_MC_LINKLOCAL(a) ((((uint32_t)(a)) & 0xffffff00) == 0xe0000000)
 392
 393 /* Max bit/byte length of IPv6 address. */
 394 #define IPV6_MAX_BYTELEN    16
 395 #define IPV6_MAX_BITLEN    128
 396 #define IPV6_MAX_PREFIXLEN 128
 397 #define IPV6_ADDR_CMP(D,S)   memcmp ((D), (S), IPV6_MAX_BYTELEN)
 398 #define IPV6_ADDR_SAME(D,S)  (memcmp ((D), (S), IPV6_MAX_BYTELEN) == 0)
 399 #define IPV6_ADDR_COPY(D,S)  memcpy ((D), (S), IPV6_MAX_BYTELEN)
 400
 401 /* Count prefix size from mask length */
 402 #define PSIZE(a) (((a) + 7) / (8))
 403
 404 #define BSIZE(a) ((a) * (8))
 405
 406 /* Prefix's family member. */
 407 #define PREFIX_FAMILY(p)  ((p)->family)
 408
 409 /* glibc defines s6_addr32 to __in6_u.__u6_addr32 if __USE_{MISC || GNU} */
 410 #ifndef s6_addr32
 411 #define s6_addr32 __u6_addr.__u6_addr32
 412 #endif /*s6_addr32*/
 413
 414 /* Prototypes. */
 415 extern int str2family(const char *);
 416 extern int afi2family(afi_t);
 417 extern afi_t family2afi(int);
 418 extern const char *family2str(int family);
 419 extern const char *safi2str(safi_t safi);
 420 extern const char *afi2str(afi_t afi);
 421
 422 /*
 423  * Check bit of the prefix.
 424  *
 425  * prefix
 426  *    byte buffer
 427  *
 428  * bit_index
 429  *    which bit to fetch from byte buffer, 0 indexed.
 430  */
 431 extern unsigned int prefix_bit(const uint8_t *prefix, const uint16_t bit_index);
 432
 433 extern struct prefix *prefix_new(void);
 434 extern void prefix_free(struct prefix **p);
 435 /*
 436  * Function to handle prefix_free being used as a del function.
 437  */
 438 extern void prefix_free_lists(void *arg);
 439 extern const char *prefix_family_str(const struct prefix *);
 440 extern int prefix_blen(const struct prefix *);
 441 extern int str2prefix(const char *, struct prefix *);
 442
 443 #define PREFIX2STR_BUFFER  PREFIX_STRLEN
 444
 445 extern void prefix_mcast_inet4_dump(const char *onfail, struct in_addr addr,
 446                                 char *buf, int buf_size);
 447 extern const char *prefix_sg2str(const struct prefix_sg *sg, char *str);
 448 extern const char *prefix2str(union prefixconstptr, char *, int);
 449 extern int evpn_type5_prefix_match(const struct prefix *evpn_pfx,
 450                                    const struct prefix *match_pfx);
 451 extern int prefix_match(const struct prefix *, const struct prefix *);
 452 extern int prefix_match_network_statement(const struct prefix *,
 453                                           const struct prefix *);
 454 extern int prefix_same(union prefixconstptr, union prefixconstptr);
 455 extern int prefix_cmp(union prefixconstptr, union prefixconstptr);
 456 extern int prefix_common_bits(const struct prefix *, const struct prefix *);
 457 extern void prefix_copy(union prefixptr, union prefixconstptr);
 458 extern void apply_mask(struct prefix *);
 459
 460 #ifdef __clang_analyzer__
 461 /* clang-SA doesn't understand transparent unions, making it think that the
 462  * target of prefix_copy is uninitialized.  So just memset the target.
 463  * cf. https://bugs.llvm.org/show_bug.cgi?id=42811
 464  */
 465 #define prefix_copy(a, b) ({ memset(a, 0, sizeof(*a)); prefix_copy(a, b); })
 466 #endif
 467
 468 extern struct prefix *sockunion2hostprefix(const union sockunion *,
 469                                            struct prefix *p);
 470 extern void prefix2sockunion(const struct prefix *, union sockunion *);
 471
 472 extern int str2prefix_eth(const char *, struct prefix_eth *);
 473
 474 extern struct prefix_ipv4 *prefix_ipv4_new(void);
 475 extern void prefix_ipv4_free(struct prefix_ipv4 **p);
 476 extern int str2prefix_ipv4(const char *, struct prefix_ipv4 *);
 477 extern void apply_mask_ipv4(struct prefix_ipv4 *);
 478
 479 #define PREFIX_COPY(DST, SRC)                                                  \
 480         *((struct prefix *)(DST)) = *((const struct prefix *)(SRC))
 481 #define PREFIX_COPY_IPV4(DST, SRC)                                             \
 482         *((struct prefix_ipv4 *)(DST)) = *((const struct prefix_ipv4 *)(SRC))
 483
 484 extern int prefix_ipv4_any(const struct prefix_ipv4 *);
 485 extern void apply_classful_mask_ipv4(struct prefix_ipv4 *);
 486
 487 extern uint8_t ip_masklen(struct in_addr);
 488 extern void masklen2ip(const int, struct in_addr *);
 489 /* given the address of a host on a network and the network mask length,
 490  * calculate the broadcast address for that network;
 491  * special treatment for /31 according to RFC3021 section 3.3 */
 492 extern in_addr_t ipv4_broadcast_addr(in_addr_t hostaddr, int masklen);
 493
 494 extern int netmask_str2prefix_str(const char *, const char *, char *, size_t);
 495
 496 extern struct prefix_ipv6 *prefix_ipv6_new(void);
 497 extern void prefix_ipv6_free(struct prefix_ipv6 **p);
 498 extern int str2prefix_ipv6(const char *, struct prefix_ipv6 *);
 499 extern void apply_mask_ipv6(struct prefix_ipv6 *);
 500
 501 #define PREFIX_COPY_IPV6(DST, SRC)                                             \
 502         *((struct prefix_ipv6 *)(DST)) = *((const struct prefix_ipv6 *)(SRC))
 503
 504 extern int ip6_masklen(struct in6_addr);
 505 extern void masklen2ip6(const int, struct in6_addr *);
 506
 507 extern const char *inet6_ntoa(struct in6_addr);
 508
 509 extern int is_zero_mac(const struct ethaddr *mac);
 510 extern bool is_mcast_mac(const struct ethaddr *mac);
 511 extern bool is_bcast_mac(const struct ethaddr *mac);
 512 extern int prefix_str2mac(const char *str, struct ethaddr *mac);
 513 extern char *prefix_mac2str(const struct ethaddr *mac, char *buf, int size);
 514
 515 extern unsigned prefix_hash_key(const void *pp);
 516
 517 extern int str_to_esi(const char *str, esi_t *esi);
 518 extern char *esi_to_str(const esi_t *esi, char *buf, int size);
 519 extern char *evpn_es_df_alg2str(uint8_t df_alg, char *buf, int buf_len);
 520 extern void prefix_evpn_hexdump(const struct prefix_evpn *p);
 521
 522 static inline int ipv6_martian(struct in6_addr *addr)
 523 {
 524         struct in6_addr localhost_addr;
 525
 526         inet_pton(AF_INET6, "::1", &localhost_addr);
 527
 528         if (IPV6_ADDR_SAME(&localhost_addr, addr))
 529                 return 1;
 530
 531         return 0;
 532 }
 533
 534 extern int macstr2prefix_evpn(const char *str, struct prefix_evpn *p);
 535
 536 /* NOTE: This routine expects the address argument in network byte order. */
 537 static inline int ipv4_martian(struct in_addr *addr)
 538 {
 539         in_addr_t ip = ntohl(addr->s_addr);
 540
 541         if (IPV4_NET0(ip) || IPV4_NET127(ip) || IPV4_CLASS_DE(ip)) {
 542                 return 1;
 543         }
 544         return 0;
 545 }
 546
 547 static inline int is_default_prefix(const struct prefix *p)
 548 {
 549         if (!p)
 550                 return 0;
 551
 552         if ((p->family == AF_INET) && (p->u.prefix4.s_addr == INADDR_ANY)
 553             && (p->prefixlen == 0))
 554                 return 1;
 555
 556         if ((p->family == AF_INET6) && (p->prefixlen == 0)
 557             && (!memcmp(&p->u.prefix6, &in6addr_any, sizeof(struct in6_addr))))
 558                 return 1;
 559
 560         return 0;
 561 }
 562
 563 static inline int is_host_route(const struct prefix *p)
 564 {
 565         if (p->family == AF_INET)
 566                 return (p->prefixlen == IPV4_MAX_BITLEN);
 567         else if (p->family == AF_INET6)
 568                 return (p->prefixlen == IPV6_MAX_BITLEN);
 569         return 0;
 570 }
 571
 572 static inline int is_default_host_route(const struct prefix *p)
 573 {
 574         if (p->family == AF_INET) {
 575                 return (p->u.prefix4.s_addr == INADDR_ANY &&
 576                         p->prefixlen == IPV4_MAX_BITLEN);
 577         } else if (p->family == AF_INET6) {
 578                 return ((!memcmp(&p->u.prefix6, &in6addr_any,
 579                                  sizeof(struct in6_addr))) &&
 580                         p->prefixlen == IPV6_MAX_BITLEN);
 581         }
 582         return 0;
 583 }
 584
 585 #ifdef _FRR_ATTRIBUTE_PRINTFRR
 586 #pragma FRR printfrr_ext "%pEA"  (struct ethaddr *)
 587
 588 #pragma FRR printfrr_ext "%pI4"  (struct in_addr *)
 589 #pragma FRR printfrr_ext "%pI4"  (in_addr_t *)
 590
 591 #pragma FRR printfrr_ext "%pI6"  (struct in6_addr *)
 592
 593 #pragma FRR printfrr_ext "%pFX"  (struct prefix *)
 594 #pragma FRR printfrr_ext "%pFX"  (struct prefix_ipv4 *)
 595 #pragma FRR printfrr_ext "%pFX"  (struct prefix_ipv6 *)
 596 #pragma FRR printfrr_ext "%pFX"  (struct prefix_eth *)
 597 #pragma FRR printfrr_ext "%pFX"  (struct prefix_evpn *)
 598 #pragma FRR printfrr_ext "%pFX"  (struct prefix_fs *)
 599
 600 #pragma FRR printfrr_ext "%pSG4" (struct prefix_sg *)
 601 #endif
 602
 603 #ifdef __cplusplus
 604 }
 605 #endif
 606
 607 #endif /* _ZEBRA_PREFIX_H */