]> git.proxmox.com Git - mirror_frr.git/blame_incremental - lib/prefix.h
projects / mirror_frr.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
Merge pull request #13649 from donaldsharp/unlock_the_node_or_else
[mirror_frr.git] / lib / prefix.h
... / ...
CommitLineData
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Prefix structure.
4 * Copyright (C) 1998 Kunihiro Ishiguro
5 */
6
7#ifndef _ZEBRA_PREFIX_H
8#define _ZEBRA_PREFIX_H
9
10#ifdef GNU_LINUX
11#include <net/ethernet.h>
12#else
13#include <netinet/if_ether.h>
14#endif
15#include "sockunion.h"
16#include "ipaddr.h"
17#include "compiler.h"
18
19#ifdef __cplusplus
20extern "C" {
21#endif
22
23#ifndef ETH_ALEN
24#define ETH_ALEN 6
25#endif
26
27/* EVPN route types. */
28typedef enum {
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;
35
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> */
43
44#define MAX_ESI {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}
45
46
47#define EVPN_ETH_TAG_BYTES 4
48#define ESI_BYTES 10
49#define ESI_STR_LEN (3 * ESI_BYTES)
50#define EVPN_DF_ALG_STR_LEN 24
51
52/* Maximum number of VTEPs per-ES -
53 * XXX - temporary limit for allocating strings etc.
54 */
55#define ES_VTEP_MAX_CNT 10
56#define ES_VTEP_LIST_STR_SZ (ES_VTEP_MAX_CNT * 16)
57
58#define ETHER_ADDR_STRLEN (3*ETH_ALEN)
59/*
60 * there isn't a portable ethernet address type. We define our
61 * own to simplify internal handling
62 */
63struct ethaddr {
64 uint8_t octet[ETH_ALEN];
65} __attribute__((packed));
66
67
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
71*/
72#define PREFIX_LEN_ROUTE_TYPE_5_IPV4 (18*8)
73#define PREFIX_LEN_ROUTE_TYPE_5_IPV6 (30*8)
74
75typedef struct esi_t_ {
76 uint8_t val[ESI_BYTES];
77} esi_t;
78
79struct evpn_ead_addr {
80 esi_t esi;
81 uint32_t eth_tag;
82 struct ipaddr ip;
83 uint16_t frag_id;
84};
85
86struct evpn_macip_addr {
87 uint32_t eth_tag;
88 uint8_t ip_prefix_length;
89 struct ethaddr mac;
90 struct ipaddr ip;
91};
92
93struct evpn_imet_addr {
94 uint32_t eth_tag;
95 uint8_t ip_prefix_length;
96 struct ipaddr ip;
97};
98
99struct evpn_es_addr {
100 esi_t esi;
101 uint8_t ip_prefix_length;
102 struct ipaddr ip;
103};
104
105struct evpn_prefix_addr {
106 uint32_t eth_tag;
107 uint8_t ip_prefix_length;
108 struct ipaddr ip;
109};
110
111/* EVPN address (RFC 7432) */
112struct evpn_addr {
113 uint8_t route_type;
114 union {
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;
120 } u;
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
126};
127
128/*
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
134 * interface.
135 */
136
137/* different OSes use different names */
138#if defined(AF_PACKET)
139#define AF_ETHERNET AF_PACKET
140#else
141#if defined(AF_LINK)
142#define AF_ETHERNET AF_LINK
143#endif
144#endif
145
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.
152 */
153#if !defined(AF_EVPN)
154#define AF_EVPN (AF_MAX + 1)
155#endif
156
157#if !defined(AF_FLOWSPEC)
158#define AF_FLOWSPEC (AF_MAX + 2)
159#endif
160
161struct flowspec_prefix {
162 uint8_t family;
163 uint16_t prefixlen; /* length in bytes */
164 uintptr_t ptr;
165};
166
167/* FRR generic prefix structure. */
168struct prefix {
169 uint8_t family;
170 uint16_t prefixlen;
171 union {
172 uint8_t prefix;
173 struct in_addr prefix4;
174 struct in6_addr prefix6;
175 struct {
176 struct in_addr id;
177 struct in_addr adv_router;
178 } lp;
179 struct ethaddr prefix_eth; /* AF_ETHERNET */
180 uint8_t val[16];
181 uint32_t val32[4];
182 uintptr_t ptr;
183 struct evpn_addr prefix_evpn; /* AF_EVPN */
184 struct flowspec_prefix prefix_flowspec; /* AF_FLOWSPEC */
185 } u __attribute__((aligned(8)));
186};
187
188/* IPv4 prefix structure. */
189struct prefix_ipv4 {
190 uint8_t family;
191 uint16_t prefixlen;
192 struct in_addr prefix __attribute__((aligned(8)));
193};
194
195/* IPv6 prefix structure. */
196struct prefix_ipv6 {
197 uint8_t family;
198 uint16_t prefixlen;
199 struct in6_addr prefix __attribute__((aligned(8)));
200};
201
202struct prefix_ls {
203 uint8_t family;
204 uint16_t prefixlen;
205 struct in_addr id __attribute__((aligned(8)));
206 struct in_addr adv_router;
207};
208
209/* Prefix for routing distinguisher. */
210struct prefix_rd {
211 uint8_t family;
212 uint16_t prefixlen;
213 uint8_t val[8] __attribute__((aligned(8)));
214};
215
216/* Prefix for ethernet. */
217struct prefix_eth {
218 uint8_t family;
219 uint16_t prefixlen;
220 struct ethaddr eth_addr __attribute__((aligned(8))); /* AF_ETHERNET */
221};
222
223/* EVPN prefix structure. */
224struct prefix_evpn {
225 uint8_t family;
226 uint16_t prefixlen;
227 struct evpn_addr prefix __attribute__((aligned(8)));
228};
229
230static inline int is_evpn_prefix_ipaddr_none(const struct prefix_evpn *evp)
231{
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);
242 return 0;
243}
244
245static inline int is_evpn_prefix_ipaddr_v4(const struct prefix_evpn *evp)
246{
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);
257 return 0;
258}
259
260static inline int is_evpn_prefix_ipaddr_v6(const struct prefix_evpn *evp)
261{
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);
272 return 0;
273}
274
275/* Prefix for a Flowspec entry */
276struct prefix_fs {
277 uint8_t family;
278 uint16_t prefixlen; /* unused */
279 struct flowspec_prefix prefix __attribute__((aligned(8)));
280};
281
282struct prefix_sg {
283 uint8_t family;
284 uint16_t prefixlen;
285 struct in_addr src __attribute__((aligned(8)));
286 struct in_addr grp;
287};
288
289union prefixptr {
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)
296} TRANSPARENT_UNION;
297
298union 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)
305} TRANSPARENT_UNION;
306
307#ifndef INET_ADDRSTRLEN
308#define INET_ADDRSTRLEN 16
309#endif /* INET_ADDRSTRLEN */
310
311#ifndef INET6_ADDRSTRLEN
312/* dead:beef:dead:beef:dead:beef:dead:beef + \0 */
313#define INET6_ADDRSTRLEN 46
314#endif /* INET6_ADDRSTRLEN */
315
316#ifndef INET6_BUFSIZ
317#define INET6_BUFSIZ 53
318#endif /* INET6_BUFSIZ */
319
320/* Maximum string length of the result of prefix2str */
321#define PREFIX_STRLEN 80
322
323/*
324 * Longest possible length of a (S,G) string is 34 bytes
325 * 123.123.123.123 = 15 * 2
326 * (,) = 3
327 * NULL Character at end = 1
328 * (123.123.123.123,123.123.123.123)
329 */
330#define PREFIX_SG_STR_LEN 34
331
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)
336
337static inline bool ipv4_addr_same(const struct in_addr *a,
338 const struct in_addr *b)
339{
340 return (a->s_addr == b->s_addr);
341}
342#define IPV4_ADDR_SAME(A,B) ipv4_addr_same((A), (B))
343
344static inline void ipv4_addr_copy(struct in_addr *dst,
345 const struct in_addr *src)
346{
347 dst->s_addr = src->s_addr;
348}
349#define IPV4_ADDR_COPY(D,S) ipv4_addr_copy((D), (S))
350
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)
358
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)
365
366/* Count prefix size from mask length */
367#define PSIZE(a) (((a) + 7) / (8))
368
369#define BSIZE(a) ((a) * (8))
370
371/* Prefix's family member. */
372#define PREFIX_FAMILY(p) ((p)->family)
373
374/* glibc defines s6_addr32 to __in6_u.__u6_addr32 if __USE_{MISC || GNU} */
375#ifndef s6_addr32
376#define s6_addr32 __u6_addr.__u6_addr32
377#endif /*s6_addr32*/
378
379/* Prototypes. */
380extern int str2family(const char *);
381extern int afi2family(afi_t);
382extern afi_t family2afi(int);
383extern const char *family2str(int family);
384extern const char *safi2str(safi_t safi);
385extern const char *afi2str(afi_t afi);
386extern const char *afi2str_lower(afi_t afi);
387
388static inline afi_t prefix_afi(union prefixconstptr pu)
389{
390 return family2afi(pu.p->family);
391}
392
393/*
394 * Check bit of the prefix.
395 *
396 * prefix
397 * byte buffer
398 *
399 * bit_index
400 * which bit to fetch from byte buffer, 0 indexed.
401 */
402extern unsigned int prefix_bit(const uint8_t *prefix, const uint16_t bit_index);
403
404extern struct prefix *prefix_new(void);
405extern void prefix_free(struct prefix **p);
406/*
407 * Function to handle prefix_free being used as a del function.
408 */
409extern void prefix_free_lists(void *arg);
410extern const char *prefix_family_str(union prefixconstptr pu);
411extern int prefix_blen(union prefixconstptr pu);
412extern int str2prefix(const char *, struct prefix *);
413
414#define PREFIX2STR_BUFFER PREFIX_STRLEN
415
416extern void prefix_mcast_inet4_dump(const char *onfail, struct in_addr addr,
417 char *buf, int buf_size);
418extern const char *prefix_sg2str(const struct prefix_sg *sg, char *str);
419extern const char *prefix2str(union prefixconstptr, char *, int);
420extern int evpn_type5_prefix_match(const struct prefix *evpn_pfx,
421 const struct prefix *match_pfx);
422extern int prefix_match(union prefixconstptr unet, union prefixconstptr upfx);
423extern int prefix_match_network_statement(union prefixconstptr unet,
424 union prefixconstptr upfx);
425extern int prefix_same(union prefixconstptr ua, union prefixconstptr ub);
426extern int prefix_cmp(union prefixconstptr ua, union prefixconstptr ub);
427extern int prefix_common_bits(union prefixconstptr ua, union prefixconstptr ub);
428extern void prefix_copy(union prefixptr udst, union prefixconstptr usrc);
429extern void apply_mask(union prefixptr pu);
430
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
435 */
436#define prefix_copy(a, b) ({ memset(a, 0, sizeof(*a)); prefix_copy(a, b); })
437#endif
438
439extern struct prefix *sockunion2hostprefix(const union sockunion *,
440 struct prefix *p);
441extern void prefix2sockunion(const struct prefix *, union sockunion *);
442
443extern int str2prefix_eth(const char *, struct prefix_eth *);
444
445extern struct prefix_ipv4 *prefix_ipv4_new(void);
446extern void prefix_ipv4_free(struct prefix_ipv4 **p);
447extern int str2prefix_ipv4(const char *, struct prefix_ipv4 *);
448extern void apply_mask_ipv4(struct prefix_ipv4 *);
449
450extern int prefix_ipv4_any(const struct prefix_ipv4 *);
451extern void apply_classful_mask_ipv4(struct prefix_ipv4 *);
452
453extern uint8_t ip_masklen(struct in_addr);
454extern 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 */
458extern in_addr_t ipv4_broadcast_addr(in_addr_t hostaddr, int masklen);
459
460extern int netmask_str2prefix_str(const char *, const char *, char *, size_t);
461
462extern struct prefix_ipv6 *prefix_ipv6_new(void);
463extern void prefix_ipv6_free(struct prefix_ipv6 **p);
464extern int str2prefix_ipv6(const char *, struct prefix_ipv6 *);
465extern void apply_mask_ipv6(struct prefix_ipv6 *);
466
467extern int ip6_masklen(struct in6_addr);
468extern void masklen2ip6(const int, struct in6_addr *);
469
470extern int is_zero_mac(const struct ethaddr *mac);
471extern bool is_mcast_mac(const struct ethaddr *mac);
472extern bool is_bcast_mac(const struct ethaddr *mac);
473extern int prefix_str2mac(const char *str, struct ethaddr *mac);
474extern char *prefix_mac2str(const struct ethaddr *mac, char *buf, int size);
475
476extern unsigned prefix_hash_key(const void *pp);
477
478extern int str_to_esi(const char *str, esi_t *esi);
479extern char *esi_to_str(const esi_t *esi, char *buf, int size);
480extern char *evpn_es_df_alg2str(uint8_t df_alg, char *buf, int buf_len);
481extern void prefix_evpn_hexdump(const struct prefix_evpn *p);
482extern bool ipv4_unicast_valid(const struct in_addr *addr);
483extern int evpn_prefix2prefix(const struct prefix *evpn, struct prefix *to);
484
485static inline int ipv6_martian(const struct in6_addr *addr)
486{
487 struct in6_addr localhost_addr;
488
489 inet_pton(AF_INET6, "::1", &localhost_addr);
490
491 if (IPV6_ADDR_SAME(&localhost_addr, addr))
492 return 1;
493
494 return 0;
495}
496
497extern int macstr2prefix_evpn(const char *str, struct prefix_evpn *p);
498
499/* NOTE: This routine expects the address argument in network byte order. */
500static inline bool ipv4_martian(const struct in_addr *addr)
501{
502 if (!ipv4_unicast_valid(addr))
503 return true;
504 return false;
505}
506
507static inline bool is_default_prefix4(const struct prefix_ipv4 *p)
508{
509 return p && p->family == AF_INET && p->prefixlen == 0
510 && p->prefix.s_addr == INADDR_ANY;
511}
512
513static inline bool is_default_prefix6(const struct prefix_ipv6 *p)
514{
515 return p && p->family == AF_INET6 && p->prefixlen == 0
516 && memcmp(&p->prefix, &in6addr_any, sizeof(struct in6_addr))
517 == 0;
518}
519
520static inline bool is_default_prefix(const struct prefix *p)
521{
522 if (p == NULL)
523 return false;
524
525 switch (p->family) {
526 case AF_INET:
527 return is_default_prefix4((const struct prefix_ipv4 *)p);
528 case AF_INET6:
529 return is_default_prefix6((const struct prefix_ipv6 *)p);
530 }
531
532 return false;
533}
534
535static inline int is_host_route(const struct prefix *p)
536{
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);
541 return 0;
542}
543
544static inline int is_default_host_route(const struct prefix *p)
545{
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);
553 }
554 return 0;
555}
556
557static inline bool is_ipv6_global_unicast(const struct in6_addr *p)
558{
559 if (IN6_IS_ADDR_UNSPECIFIED(p) || IN6_IS_ADDR_LOOPBACK(p) ||
560 IN6_IS_ADDR_LINKLOCAL(p) || IN6_IS_ADDR_MULTICAST(p))
561 return false;
562
563 return true;
564}
565
566/* IPv6 scope values, usable for IPv4 too (cf. below) */
567/* clang-format off */
568enum {
569 /* 0: reserved */
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,
579 /* f: reserved */
580};
581/* clang-format on */
582
583static inline uint8_t ipv6_mcast_scope(const struct in6_addr *addr)
584{
585 return addr->s6_addr[1] & 0xf;
586}
587
588static inline bool ipv6_mcast_nofwd(const struct in6_addr *addr)
589{
590 return (addr->s6_addr[1] & 0xf) <= MCAST_SCOPE_LINK;
591}
592
593static inline bool ipv6_mcast_ssm(const struct in6_addr *addr)
594{
595 uint32_t bits = ntohl(addr->s6_addr32[0]);
596
597 /* ff3x:0000::/32 */
598 return (bits & 0xfff0ffff) == 0xff300000;
599}
600
601static inline bool ipv6_mcast_reserved(const struct in6_addr *addr)
602{
603 uint32_t bits = ntohl(addr->s6_addr32[0]);
604
605 /* ffx2::/16 */
606 return (bits & 0xff0fffff) == 0xff020000;
607}
608
609static inline uint8_t ipv4_mcast_scope(const struct in_addr *addr)
610{
611 uint32_t bits = ntohl(addr->s_addr);
612
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;
619
620 return MCAST_SCOPE_GLOBAL;
621}
622
623static inline bool ipv4_mcast_nofwd(const struct in_addr *addr)
624{
625 uint32_t bits = ntohl(addr->s_addr);
626
627 /* 224.0.0.0/24 */
628 return (bits & 0xffffff00) == 0xe0000000;
629}
630
631static inline bool ipv4_mcast_ssm(const struct in_addr *addr)
632{
633 uint32_t bits = ntohl(addr->s_addr);
634
635 /* 232.0.0.0/8 */
636 return (bits & 0xff000000) == 0xe8000000;
637}
638
639#ifdef _FRR_ATTRIBUTE_PRINTFRR
640#pragma FRR printfrr_ext "%pEA" (struct ethaddr *)
641
642#pragma FRR printfrr_ext "%pI4" (struct in_addr *)
643#pragma FRR printfrr_ext "%pI4" (in_addr_t *)
644
645#pragma FRR printfrr_ext "%pI6" (struct in6_addr *)
646
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 *)
657
658#pragma FRR printfrr_ext "%pPSG4" (struct prefix_sg *)
659#endif
660
661#ifdef __cplusplus
662}
663#endif
664
665#endif /* _ZEBRA_PREFIX_H */
FRRouting mirror