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 /* EVPN route types. */
  47 typedef enum {
  48         BGP_EVPN_AD_ROUTE = 1,    /* Ethernet Auto-Discovery (A-D) route */
  49         BGP_EVPN_MAC_IP_ROUTE,    /* MAC/IP Advertisement route */
  50         BGP_EVPN_IMET_ROUTE,      /* Inclusive Multicast Ethernet Tag route */
  51         BGP_EVPN_ES_ROUTE,        /* Ethernet Segment route */
  52         BGP_EVPN_IP_PREFIX_ROUTE, /* IP Prefix route */
  53 } bgp_evpn_route_type;
  54
  55 /* value of first byte of ESI */
  56 #define ESI_TYPE_ARBITRARY 0  /* */
  57 #define ESI_TYPE_LACP      1  /* <> */
  58 #define ESI_TYPE_BRIDGE    2  /* <Root bridge Mac-6B>:<Root Br Priority-2B>:00 */
  59 #define ESI_TYPE_MAC       3  /* <Syst Mac Add-6B>:<Local Discriminator Value-3B> */
  60 #define ESI_TYPE_ROUTER    4  /* <RouterId-4B>:<Local Discriminator Value-4B> */
  61 #define ESI_TYPE_AS        5  /* <AS-4B>:<Local Discriminator Value-4B> */
  62
  63 #define MAX_ESI {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}
  64
  65
  66 #define EVPN_ETH_TAG_BYTES 4
  67 #define ESI_BYTES 10
  68 #define ESI_STR_LEN (3 * ESI_BYTES)
  69
  70 /* Maximum number of VTEPs per-ES -
  71  * XXX - temporary limit for allocating strings etc.
  72  */
  73 #define ES_VTEP_MAX_CNT 10
  74 #define ES_VTEP_LIST_STR_SZ (ES_VTEP_MAX_CNT * 16)
  75
  76 #define ETHER_ADDR_STRLEN (3*ETH_ALEN)
  77 /*
  78  * there isn't a portable ethernet address type. We define our
  79  * own to simplify internal handling
  80  */
  81 struct ethaddr {
  82         uint8_t octet[ETH_ALEN];
  83 } __attribute__((packed));
  84
  85
  86 /* length is the number of valuable bits of prefix structure
  87 * 18 bytes is current length in structure, if address is ipv4
  88 * 30 bytes is in case of ipv6
  89 */
  90 #define PREFIX_LEN_ROUTE_TYPE_5_IPV4 (18*8)
  91 #define PREFIX_LEN_ROUTE_TYPE_5_IPV6 (30*8)
  92
  93 typedef struct esi_t_ {
  94         uint8_t val[ESI_BYTES];
  95 } esi_t;
  96
  97 struct evpn_ead_addr {
  98         esi_t esi;
  99         uint32_t eth_tag;
 100         struct ipaddr ip;
 101 };
 102
 103 struct evpn_macip_addr {
 104         uint32_t eth_tag;
 105         uint8_t ip_prefix_length;
 106         struct ethaddr mac;
 107         struct ipaddr ip;
 108 };
 109
 110 struct evpn_imet_addr {
 111         uint32_t eth_tag;
 112         uint8_t ip_prefix_length;
 113         struct ipaddr ip;
 114 };
 115
 116 struct evpn_es_addr {
 117         esi_t esi;
 118         uint8_t ip_prefix_length;
 119         struct ipaddr ip;
 120 };
 121
 122 struct evpn_prefix_addr {
 123         uint32_t eth_tag;
 124         uint8_t ip_prefix_length;
 125         struct ipaddr ip;
 126 };
 127
 128 /* EVPN address (RFC 7432) */
 129 struct evpn_addr {
 130         uint8_t route_type;
 131         union {
 132                 struct evpn_ead_addr _ead_addr;
 133                 struct evpn_macip_addr _macip_addr;
 134                 struct evpn_imet_addr _imet_addr;
 135                 struct evpn_es_addr _es_addr;
 136                 struct evpn_prefix_addr _prefix_addr;
 137         } u;
 138 #define ead_addr u._ead_addr
 139 #define macip_addr u._macip_addr
 140 #define imet_addr u._imet_addr
 141 #define es_addr u._es_addr
 142 #define prefix_addr u._prefix_addr
 143 };
 144
 145 /*
 146  * A struct prefix contains an address family, a prefix length, and an
 147  * address.  This can represent either a 'network prefix' as defined
 148  * by CIDR, where the 'host bits' of the prefix are 0
 149  * (e.g. AF_INET:10.0.0.0/8), or an address and netmask
 150  * (e.g. AF_INET:10.0.0.9/8), such as might be configured on an
 151  * interface.
 152  */
 153
 154 /* different OSes use different names */
 155 #if defined(AF_PACKET)
 156 #define AF_ETHERNET AF_PACKET
 157 #else
 158 #if defined(AF_LINK)
 159 #define AF_ETHERNET AF_LINK
 160 #endif
 161 #endif
 162
 163 /* The 'family' in the prefix structure is internal to FRR and need not
 164  * map to standard OS AF_ definitions except where needed for interacting
 165  * with the kernel. However, AF_ definitions are currently in use and
 166  * prevalent across the code. Define a new FRR-specific AF for EVPN to
 167  * distinguish between 'ethernet' (MAC-only) and 'evpn' prefixes and
 168  * ensure it does not conflict with any OS AF_ definition.
 169  */
 170 #if !defined(AF_EVPN)
 171 #define AF_EVPN (AF_MAX + 1)
 172 #endif
 173
 174 #if !defined(AF_FLOWSPEC)
 175 #define AF_FLOWSPEC (AF_MAX + 2)
 176 #endif
 177
 178 struct flowspec_prefix {
 179         uint16_t prefixlen; /* length in bytes */
 180         uintptr_t ptr;
 181 };
 182
 183 /* FRR generic prefix structure. */
 184 struct prefix {
 185         uint8_t family;
 186         uint16_t prefixlen;
 187         union {
 188                 uint8_t prefix;
 189                 struct in_addr prefix4;
 190                 struct in6_addr prefix6;
 191                 struct {
 192                         struct in_addr id;
 193                         struct in_addr adv_router;
 194                 } lp;
 195                 struct ethaddr prefix_eth; /* AF_ETHERNET */
 196                 uint8_t val[16];
 197                 uint32_t val32[4];
 198                 uintptr_t ptr;
 199                 struct evpn_addr prefix_evpn; /* AF_EVPN */
 200                 struct flowspec_prefix prefix_flowspec; /* AF_FLOWSPEC */
 201         } u __attribute__((aligned(8)));
 202 };
 203
 204 /* IPv4 prefix structure. */
 205 struct prefix_ipv4 {
 206         uint8_t family;
 207         uint16_t prefixlen;
 208         struct in_addr prefix __attribute__((aligned(8)));
 209 };
 210
 211 /* IPv6 prefix structure. */
 212 struct prefix_ipv6 {
 213         uint8_t family;
 214         uint16_t prefixlen;
 215         struct in6_addr prefix __attribute__((aligned(8)));
 216 };
 217
 218 struct prefix_ls {
 219         uint8_t family;
 220         uint16_t prefixlen;
 221         struct in_addr id __attribute__((aligned(8)));
 222         struct in_addr adv_router;
 223 };
 224
 225 /* Prefix for routing distinguisher. */
 226 struct prefix_rd {
 227         uint8_t family;
 228         uint16_t prefixlen;
 229         uint8_t val[8] __attribute__((aligned(8)));
 230 };
 231
 232 /* Prefix for ethernet. */
 233 struct prefix_eth {
 234         uint8_t family;
 235         uint16_t prefixlen;
 236         struct ethaddr eth_addr __attribute__((aligned(8))); /* AF_ETHERNET */
 237 };
 238
 239 /* EVPN prefix structure. */
 240 struct prefix_evpn {
 241         uint8_t family;
 242         uint16_t prefixlen;
 243         struct evpn_addr prefix __attribute__((aligned(8)));
 244 };
 245
 246 static inline int is_evpn_prefix_ipaddr_none(const struct prefix_evpn *evp)
 247 {
 248         if (evp->prefix.route_type == BGP_EVPN_AD_ROUTE)
 249                 return IS_IPADDR_NONE(&(evp)->prefix.ead_addr.ip);
 250         if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE)
 251                 return IS_IPADDR_NONE(&(evp)->prefix.macip_addr.ip);
 252         if (evp->prefix.route_type == BGP_EVPN_IMET_ROUTE)
 253                 return IS_IPADDR_NONE(&(evp)->prefix.imet_addr.ip);
 254         if (evp->prefix.route_type == BGP_EVPN_ES_ROUTE)
 255                 return IS_IPADDR_NONE(&(evp)->prefix.es_addr.ip);
 256         if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)
 257                 return IS_IPADDR_NONE(&(evp)->prefix.prefix_addr.ip);
 258         return 0;
 259 }
 260
 261 static inline int is_evpn_prefix_ipaddr_v4(const struct prefix_evpn *evp)
 262 {
 263         if (evp->prefix.route_type == BGP_EVPN_AD_ROUTE)
 264                 return IS_IPADDR_V4(&(evp)->prefix.ead_addr.ip);
 265         if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE)
 266                 return IS_IPADDR_V4(&(evp)->prefix.macip_addr.ip);
 267         if (evp->prefix.route_type == BGP_EVPN_IMET_ROUTE)
 268                 return IS_IPADDR_V4(&(evp)->prefix.imet_addr.ip);
 269         if (evp->prefix.route_type == BGP_EVPN_ES_ROUTE)
 270                 return IS_IPADDR_V4(&(evp)->prefix.es_addr.ip);
 271         if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)
 272                 return IS_IPADDR_V4(&(evp)->prefix.prefix_addr.ip);
 273         return 0;
 274 }
 275
 276 static inline int is_evpn_prefix_ipaddr_v6(const struct prefix_evpn *evp)
 277 {
 278         if (evp->prefix.route_type == BGP_EVPN_AD_ROUTE)
 279                 return IS_IPADDR_V6(&(evp)->prefix.ead_addr.ip);
 280         if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE)
 281                 return IS_IPADDR_V6(&(evp)->prefix.macip_addr.ip);
 282         if (evp->prefix.route_type == BGP_EVPN_IMET_ROUTE)
 283                 return IS_IPADDR_V6(&(evp)->prefix.imet_addr.ip);
 284         if (evp->prefix.route_type == BGP_EVPN_ES_ROUTE)
 285                 return IS_IPADDR_V6(&(evp)->prefix.es_addr.ip);
 286         if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)
 287                 return IS_IPADDR_V6(&(evp)->prefix.prefix_addr.ip);
 288         return 0;
 289 }
 290
 291 /* Prefix for a generic pointer */
 292 struct prefix_ptr {
 293         uint8_t family;
 294         uint16_t prefixlen;
 295         uintptr_t prefix __attribute__((aligned(8)));
 296 };
 297
 298 /* Prefix for a Flowspec entry */
 299 struct prefix_fs {
 300         uint8_t family;
 301         uint16_t prefixlen; /* unused */
 302         struct flowspec_prefix  prefix __attribute__((aligned(8)));
 303 };
 304
 305 struct prefix_sg {
 306         uint8_t family;
 307         uint16_t prefixlen;
 308         struct in_addr src __attribute__((aligned(8)));
 309         struct in_addr grp;
 310 };
 311
 312 /* helper to get type safety/avoid casts on calls
 313  * (w/o this, functions accepting all prefix types need casts on the caller
 314  * side, which strips type safety since the cast will accept any pointer
 315  * type.)
 316  */
 317 #ifndef __cplusplus
 318 #define prefixtype(uname, typename, fieldname) \
 319         typename *fieldname;
 320 #else
 321 #define prefixtype(uname, typename, fieldname) \
 322         typename *fieldname; \
 323         uname(typename *x) { this->fieldname = x; }
 324 #endif
 325
 326 union prefixptr {
 327         prefixtype(prefixptr, struct prefix,      p)
 328         prefixtype(prefixptr, struct prefix_ipv4, p4)
 329         prefixtype(prefixptr, struct prefix_ipv6, p6)
 330         prefixtype(prefixptr, struct prefix_evpn, evp)
 331         prefixtype(prefixptr, struct prefix_fs,   fs)
 332         prefixtype(prefixptr, struct prefix_rd,   rd)
 333 } __attribute__((transparent_union));
 334
 335 union prefixconstptr {
 336         prefixtype(prefixconstptr, const struct prefix,      p)
 337         prefixtype(prefixconstptr, const struct prefix_ipv4, p4)
 338         prefixtype(prefixconstptr, const struct prefix_ipv6, p6)
 339         prefixtype(prefixconstptr, const struct prefix_evpn, evp)
 340         prefixtype(prefixconstptr, const struct prefix_fs,   fs)
 341         prefixtype(prefixconstptr, const struct prefix_rd,   rd)
 342 } __attribute__((transparent_union));
 343
 344 #ifndef INET_ADDRSTRLEN
 345 #define INET_ADDRSTRLEN 16
 346 #endif /* INET_ADDRSTRLEN */
 347
 348 #ifndef INET6_ADDRSTRLEN
 349 /* dead:beef:dead:beef:dead:beef:dead:beef + \0 */
 350 #define INET6_ADDRSTRLEN 46
 351 #endif /* INET6_ADDRSTRLEN */
 352
 353 #ifndef INET6_BUFSIZ
 354 #define INET6_BUFSIZ 53
 355 #endif /* INET6_BUFSIZ */
 356
 357 /* Maximum string length of the result of prefix2str */
 358 #define PREFIX_STRLEN 80
 359
 360 /*
 361  * Longest possible length of a (S,G) string is 36 bytes
 362  * 123.123.123.123 = 15 * 2
 363  * (,) = 3
 364  * NULL Character at end = 1
 365  * (123.123.123.123,123.123.123.123)
 366  */
 367 #define PREFIX_SG_STR_LEN 34
 368
 369 /* Max bit/byte length of IPv4 address. */
 370 #define IPV4_MAX_BYTELEN    4
 371 #define IPV4_MAX_BITLEN    32
 372 #define IPV4_MAX_PREFIXLEN 32
 373 #define IPV4_ADDR_CMP(D,S)   memcmp ((D), (S), IPV4_MAX_BYTELEN)
 374
 375 static inline bool ipv4_addr_same(const struct in_addr *a,
 376                                   const struct in_addr *b)
 377 {
 378         return (a->s_addr == b->s_addr);
 379 }
 380 #define IPV4_ADDR_SAME(A,B)  ipv4_addr_same((A), (B))
 381
 382 static inline void ipv4_addr_copy(struct in_addr *dst,
 383                                   const struct in_addr *src)
 384 {
 385         dst->s_addr = src->s_addr;
 386 }
 387 #define IPV4_ADDR_COPY(D,S)  ipv4_addr_copy((D), (S))
 388
 389 #define IPV4_NET0(a) ((((uint32_t)(a)) & 0xff000000) == 0x00000000)
 390 #define IPV4_NET127(a) ((((uint32_t)(a)) & 0xff000000) == 0x7f000000)
 391 #define IPV4_LINKLOCAL(a) ((((uint32_t)(a)) & 0xffff0000) == 0xa9fe0000)
 392 #define IPV4_CLASS_DE(a) ((((uint32_t)(a)) & 0xe0000000) == 0xe0000000)
 393 #define IPV4_MC_LINKLOCAL(a) ((((uint32_t)(a)) & 0xffffff00) == 0xe0000000)
 394
 395 /* Max bit/byte length of IPv6 address. */
 396 #define IPV6_MAX_BYTELEN    16
 397 #define IPV6_MAX_BITLEN    128
 398 #define IPV6_MAX_PREFIXLEN 128
 399 #define IPV6_ADDR_CMP(D,S)   memcmp ((D), (S), IPV6_MAX_BYTELEN)
 400 #define IPV6_ADDR_SAME(D,S)  (memcmp ((D), (S), IPV6_MAX_BYTELEN) == 0)
 401 #define IPV6_ADDR_COPY(D,S)  memcpy ((D), (S), IPV6_MAX_BYTELEN)
 402
 403 /* Count prefix size from mask length */
 404 #define PSIZE(a) (((a) + 7) / (8))
 405
 406 #define BSIZE(a) ((a) * (8))
 407
 408 /* Prefix's family member. */
 409 #define PREFIX_FAMILY(p)  ((p)->family)
 410
 411 /* glibc defines s6_addr32 to __in6_u.__u6_addr32 if __USE_{MISC || GNU} */
 412 #ifndef s6_addr32
 413 #if defined(SUNOS_5)
 414 /* Some SunOS define s6_addr32 only to kernel */
 415 #define s6_addr32 _S6_un._S6_u32
 416 #else
 417 #define s6_addr32 __u6_addr.__u6_addr32
 418 #endif /* SUNOS_5 */
 419 #endif /*s6_addr32*/
 420
 421 /* Prototypes. */
 422 extern int str2family(const char *);
 423 extern int afi2family(afi_t);
 424 extern afi_t family2afi(int);
 425 extern const char *family2str(int family);
 426 extern const char *safi2str(safi_t safi);
 427 extern const char *afi2str(afi_t afi);
 428
 429 /*
 430  * Check bit of the prefix.
 431  *
 432  * prefix
 433  *    byte buffer
 434  *
 435  * bit_index
 436  *    which bit to fetch from byte buffer, 0 indexed.
 437  */
 438 extern unsigned int prefix_bit(const uint8_t *prefix, const uint16_t bit_index);
 439
 440 extern struct prefix *prefix_new(void);
 441 extern void prefix_free(struct prefix **p);
 442 /*
 443  * Function to handle prefix_free being used as a del function.
 444  */
 445 extern void prefix_free_lists(void *arg);
 446 extern const char *prefix_family_str(const struct prefix *);
 447 extern int prefix_blen(const struct prefix *);
 448 extern int str2prefix(const char *, struct prefix *);
 449
 450 #define PREFIX2STR_BUFFER  PREFIX_STRLEN
 451
 452 extern void prefix_mcast_inet4_dump(const char *onfail, struct in_addr addr,
 453                                 char *buf, int buf_size);
 454 extern const char *prefix_sg2str(const struct prefix_sg *sg, char *str);
 455 extern const char *prefix2str(union prefixconstptr, char *, int);
 456 extern int evpn_type5_prefix_match(const struct prefix *evpn_pfx,
 457                                    const struct prefix *match_pfx);
 458 extern int prefix_match(const struct prefix *, const struct prefix *);
 459 extern int prefix_match_network_statement(const struct prefix *,
 460                                           const struct prefix *);
 461 extern int prefix_same(union prefixconstptr, union prefixconstptr);
 462 extern int prefix_cmp(union prefixconstptr, union prefixconstptr);
 463 extern int prefix_common_bits(const struct prefix *, const struct prefix *);
 464 extern void prefix_copy(union prefixptr, union prefixconstptr);
 465 extern void apply_mask(struct prefix *);
 466
 467 #ifdef __clang_analyzer__
 468 /* clang-SA doesn't understand transparent unions, making it think that the
 469  * target of prefix_copy is uninitialized.  So just memset the target.
 470  * cf. https://bugs.llvm.org/show_bug.cgi?id=42811
 471  */
 472 #define prefix_copy(a, b) ({ memset(a, 0, sizeof(*a)); prefix_copy(a, b); })
 473 #endif
 474
 475 extern struct prefix *sockunion2hostprefix(const union sockunion *,
 476                                            struct prefix *p);
 477 extern void prefix2sockunion(const struct prefix *, union sockunion *);
 478
 479 extern int str2prefix_eth(const char *, struct prefix_eth *);
 480
 481 extern struct prefix_ipv4 *prefix_ipv4_new(void);
 482 extern void prefix_ipv4_free(struct prefix_ipv4 **p);
 483 extern int str2prefix_ipv4(const char *, struct prefix_ipv4 *);
 484 extern void apply_mask_ipv4(struct prefix_ipv4 *);
 485
 486 #define PREFIX_COPY(DST, SRC)                                                  \
 487         *((struct prefix *)(DST)) = *((const struct prefix *)(SRC))
 488 #define PREFIX_COPY_IPV4(DST, SRC)                                             \
 489         *((struct prefix_ipv4 *)(DST)) = *((const struct prefix_ipv4 *)(SRC));
 490
 491 extern int prefix_ipv4_any(const struct prefix_ipv4 *);
 492 extern void apply_classful_mask_ipv4(struct prefix_ipv4 *);
 493
 494 extern uint8_t ip_masklen(struct in_addr);
 495 extern void masklen2ip(const int, struct in_addr *);
 496 /* given the address of a host on a network and the network mask length,
 497  * calculate the broadcast address for that network;
 498  * special treatment for /31 according to RFC3021 section 3.3 */
 499 extern in_addr_t ipv4_broadcast_addr(in_addr_t hostaddr, int masklen);
 500
 501 extern int netmask_str2prefix_str(const char *, const char *, char *);
 502
 503 extern struct prefix_ipv6 *prefix_ipv6_new(void);
 504 extern void prefix_ipv6_free(struct prefix_ipv6 **p);
 505 extern int str2prefix_ipv6(const char *, struct prefix_ipv6 *);
 506 extern void apply_mask_ipv6(struct prefix_ipv6 *);
 507
 508 #define PREFIX_COPY_IPV6(DST, SRC)                                             \
 509         *((struct prefix_ipv6 *)(DST)) = *((const struct prefix_ipv6 *)(SRC));
 510
 511 extern int ip6_masklen(struct in6_addr);
 512 extern void masklen2ip6(const int, struct in6_addr *);
 513
 514 extern const char *inet6_ntoa(struct in6_addr);
 515
 516 extern int is_zero_mac(const struct ethaddr *mac);
 517 extern bool is_mcast_mac(const struct ethaddr *mac);
 518 extern bool is_bcast_mac(const struct ethaddr *mac);
 519 extern int prefix_str2mac(const char *str, struct ethaddr *mac);
 520 extern char *prefix_mac2str(const struct ethaddr *mac, char *buf, int size);
 521
 522 extern unsigned prefix_hash_key(const void *pp);
 523
 524 extern int str_to_esi(const char *str, esi_t *esi);
 525 extern char *esi_to_str(const esi_t *esi, char *buf, int size);
 526 extern void prefix_evpn_hexdump(const struct prefix_evpn *p);
 527
 528 static inline int ipv6_martian(struct in6_addr *addr)
 529 {
 530         struct in6_addr localhost_addr;
 531
 532         inet_pton(AF_INET6, "::1", &localhost_addr);
 533
 534         if (IPV6_ADDR_SAME(&localhost_addr, addr))
 535                 return 1;
 536
 537         return 0;
 538 }
 539
 540 extern int macstr2prefix_evpn(const char *str, struct prefix_evpn *p);
 541
 542 /* NOTE: This routine expects the address argument in network byte order. */
 543 static inline int ipv4_martian(struct in_addr *addr)
 544 {
 545         in_addr_t ip = ntohl(addr->s_addr);
 546
 547         if (IPV4_NET0(ip) || IPV4_NET127(ip) || IPV4_CLASS_DE(ip)) {
 548                 return 1;
 549         }
 550         return 0;
 551 }
 552
 553 static inline int is_default_prefix(const struct prefix *p)
 554 {
 555         if (!p)
 556                 return 0;
 557
 558         if ((p->family == AF_INET) && (p->u.prefix4.s_addr == INADDR_ANY)
 559             && (p->prefixlen == 0))
 560                 return 1;
 561
 562         if ((p->family == AF_INET6) && (p->prefixlen == 0)
 563             && (!memcmp(&p->u.prefix6, &in6addr_any, sizeof(struct in6_addr))))
 564                 return 1;
 565
 566         return 0;
 567 }
 568
 569 static inline int is_host_route(const struct prefix *p)
 570 {
 571         if (p->family == AF_INET)
 572                 return (p->prefixlen == IPV4_MAX_BITLEN);
 573         else if (p->family == AF_INET6)
 574                 return (p->prefixlen == IPV6_MAX_BITLEN);
 575         return 0;
 576 }
 577
 578 static inline int is_default_host_route(const struct prefix *p)
 579 {
 580         if (p->family == AF_INET) {
 581                 return (p->u.prefix4.s_addr == INADDR_ANY &&
 582                         p->prefixlen == IPV4_MAX_BITLEN);
 583         } else if (p->family == AF_INET6) {
 584                 return ((!memcmp(&p->u.prefix6, &in6addr_any,
 585                                  sizeof(struct in6_addr))) &&
 586                         p->prefixlen == IPV6_MAX_BITLEN);
 587         }
 588         return 0;
 589 }
 590
 591 #ifdef _FRR_ATTRIBUTE_PRINTFRR
 592 #pragma FRR printfrr_ext "%pEA"  (struct ethaddr *)
 593
 594 #pragma FRR printfrr_ext "%pI4"  (struct in_addr *)
 595 #pragma FRR printfrr_ext "%pI4"  (in_addr_t *)
 596
 597 #pragma FRR printfrr_ext "%pI6"  (struct in6_addr *)
 598
 599 #pragma FRR printfrr_ext "%pFX"  (struct prefix *)
 600 #pragma FRR printfrr_ext "%pFX"  (struct prefix_ipv4 *)
 601 #pragma FRR printfrr_ext "%pFX"  (struct prefix_ipv6 *)
 602 #pragma FRR printfrr_ext "%pFX"  (struct prefix_eth *)
 603 #pragma FRR printfrr_ext "%pFX"  (struct prefix_evpn *)
 604 #pragma FRR printfrr_ext "%pFX"  (struct prefix_fs *)
 605
 606 #pragma FRR printfrr_ext "%pSG4" (struct prefix_sg *)
 607 #endif
 608
 609 #ifdef __cplusplus
 610 }
 611 #endif
 612
 613 #endif /* _ZEBRA_PREFIX_H */