Line data Source code
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 : uint16_t frag_id;
99 : };
100 :
101 : struct evpn_macip_addr {
102 : uint32_t eth_tag;
103 : uint8_t ip_prefix_length;
104 : struct ethaddr mac;
105 : struct ipaddr ip;
106 : };
107 :
108 : struct evpn_imet_addr {
109 : uint32_t eth_tag;
110 : uint8_t ip_prefix_length;
111 : struct ipaddr ip;
112 : };
113 :
114 : struct evpn_es_addr {
115 : esi_t esi;
116 : uint8_t ip_prefix_length;
117 : struct ipaddr ip;
118 : };
119 :
120 : struct evpn_prefix_addr {
121 : uint32_t eth_tag;
122 : uint8_t ip_prefix_length;
123 : struct ipaddr ip;
124 : };
125 :
126 : /* EVPN address (RFC 7432) */
127 : struct evpn_addr {
128 : uint8_t route_type;
129 : union {
130 : struct evpn_ead_addr _ead_addr;
131 : struct evpn_macip_addr _macip_addr;
132 : struct evpn_imet_addr _imet_addr;
133 : struct evpn_es_addr _es_addr;
134 : struct evpn_prefix_addr _prefix_addr;
135 : } u;
136 : #define ead_addr u._ead_addr
137 : #define macip_addr u._macip_addr
138 : #define imet_addr u._imet_addr
139 : #define es_addr u._es_addr
140 : #define prefix_addr u._prefix_addr
141 : };
142 :
143 : /*
144 : * A struct prefix contains an address family, a prefix length, and an
145 : * address. This can represent either a 'network prefix' as defined
146 : * by CIDR, where the 'host bits' of the prefix are 0
147 : * (e.g. AF_INET:10.0.0.0/8), or an address and netmask
148 : * (e.g. AF_INET:10.0.0.9/8), such as might be configured on an
149 : * interface.
150 : */
151 :
152 : /* different OSes use different names */
153 : #if defined(AF_PACKET)
154 : #define AF_ETHERNET AF_PACKET
155 : #else
156 : #if defined(AF_LINK)
157 : #define AF_ETHERNET AF_LINK
158 : #endif
159 : #endif
160 :
161 : /* The 'family' in the prefix structure is internal to FRR and need not
162 : * map to standard OS AF_ definitions except where needed for interacting
163 : * with the kernel. However, AF_ definitions are currently in use and
164 : * prevalent across the code. Define a new FRR-specific AF for EVPN to
165 : * distinguish between 'ethernet' (MAC-only) and 'evpn' prefixes and
166 : * ensure it does not conflict with any OS AF_ definition.
167 : */
168 : #if !defined(AF_EVPN)
169 : #define AF_EVPN (AF_MAX + 1)
170 : #endif
171 :
172 : #if !defined(AF_FLOWSPEC)
173 : #define AF_FLOWSPEC (AF_MAX + 2)
174 : #endif
175 :
176 : struct flowspec_prefix {
177 : uint8_t family;
178 : uint16_t prefixlen; /* length in bytes */
179 : uintptr_t ptr;
180 : };
181 :
182 : /* FRR generic prefix structure. */
183 : struct prefix {
184 : uint8_t family;
185 : uint16_t prefixlen;
186 : union {
187 : uint8_t prefix;
188 : struct in_addr prefix4;
189 : struct in6_addr prefix6;
190 : struct {
191 : struct in_addr id;
192 : struct in_addr adv_router;
193 : } lp;
194 : struct ethaddr prefix_eth; /* AF_ETHERNET */
195 : uint8_t val[16];
196 : uint32_t val32[4];
197 : uintptr_t ptr;
198 : struct evpn_addr prefix_evpn; /* AF_EVPN */
199 : struct flowspec_prefix prefix_flowspec; /* AF_FLOWSPEC */
200 : } u __attribute__((aligned(8)));
201 : };
202 :
203 : /* IPv4 prefix structure. */
204 : struct prefix_ipv4 {
205 : uint8_t family;
206 : uint16_t prefixlen;
207 : struct in_addr prefix __attribute__((aligned(8)));
208 : };
209 :
210 : /* IPv6 prefix structure. */
211 : struct prefix_ipv6 {
212 : uint8_t family;
213 : uint16_t prefixlen;
214 : struct in6_addr prefix __attribute__((aligned(8)));
215 : };
216 :
217 : struct prefix_ls {
218 : uint8_t family;
219 : uint16_t prefixlen;
220 : struct in_addr id __attribute__((aligned(8)));
221 : struct in_addr adv_router;
222 : };
223 :
224 : /* Prefix for routing distinguisher. */
225 : struct prefix_rd {
226 : uint8_t family;
227 : uint16_t prefixlen;
228 : uint8_t val[8] __attribute__((aligned(8)));
229 : };
230 :
231 : /* Prefix for ethernet. */
232 : struct prefix_eth {
233 : uint8_t family;
234 : uint16_t prefixlen;
235 : struct ethaddr eth_addr __attribute__((aligned(8))); /* AF_ETHERNET */
236 : };
237 :
238 : /* EVPN prefix structure. */
239 : struct prefix_evpn {
240 : uint8_t family;
241 : uint16_t prefixlen;
242 : struct evpn_addr prefix __attribute__((aligned(8)));
243 : };
244 :
245 0 : static inline int is_evpn_prefix_ipaddr_none(const struct prefix_evpn *evp)
246 : {
247 0 : if (evp->prefix.route_type == BGP_EVPN_AD_ROUTE)
248 0 : return IS_IPADDR_NONE(&(evp)->prefix.ead_addr.ip);
249 0 : if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE)
250 0 : return IS_IPADDR_NONE(&(evp)->prefix.macip_addr.ip);
251 0 : if (evp->prefix.route_type == BGP_EVPN_IMET_ROUTE)
252 0 : return IS_IPADDR_NONE(&(evp)->prefix.imet_addr.ip);
253 0 : if (evp->prefix.route_type == BGP_EVPN_ES_ROUTE)
254 0 : return IS_IPADDR_NONE(&(evp)->prefix.es_addr.ip);
255 0 : if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)
256 0 : return IS_IPADDR_NONE(&(evp)->prefix.prefix_addr.ip);
257 : return 0;
258 : }
259 :
260 0 : static inline int is_evpn_prefix_ipaddr_v4(const struct prefix_evpn *evp)
261 : {
262 0 : if (evp->prefix.route_type == BGP_EVPN_AD_ROUTE)
263 0 : return IS_IPADDR_V4(&(evp)->prefix.ead_addr.ip);
264 0 : if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE)
265 0 : return IS_IPADDR_V4(&(evp)->prefix.macip_addr.ip);
266 0 : if (evp->prefix.route_type == BGP_EVPN_IMET_ROUTE)
267 0 : return IS_IPADDR_V4(&(evp)->prefix.imet_addr.ip);
268 0 : if (evp->prefix.route_type == BGP_EVPN_ES_ROUTE)
269 0 : return IS_IPADDR_V4(&(evp)->prefix.es_addr.ip);
270 0 : if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)
271 0 : return IS_IPADDR_V4(&(evp)->prefix.prefix_addr.ip);
272 : return 0;
273 : }
274 :
275 0 : static inline int is_evpn_prefix_ipaddr_v6(const struct prefix_evpn *evp)
276 : {
277 0 : if (evp->prefix.route_type == BGP_EVPN_AD_ROUTE)
278 0 : return IS_IPADDR_V6(&(evp)->prefix.ead_addr.ip);
279 0 : if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE)
280 0 : return IS_IPADDR_V6(&(evp)->prefix.macip_addr.ip);
281 0 : if (evp->prefix.route_type == BGP_EVPN_IMET_ROUTE)
282 0 : return IS_IPADDR_V6(&(evp)->prefix.imet_addr.ip);
283 0 : if (evp->prefix.route_type == BGP_EVPN_ES_ROUTE)
284 0 : return IS_IPADDR_V6(&(evp)->prefix.es_addr.ip);
285 0 : if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE)
286 0 : return IS_IPADDR_V6(&(evp)->prefix.prefix_addr.ip);
287 : return 0;
288 : }
289 :
290 : /* Prefix for a Flowspec entry */
291 : struct prefix_fs {
292 : uint8_t family;
293 : uint16_t prefixlen; /* unused */
294 : struct flowspec_prefix prefix __attribute__((aligned(8)));
295 : };
296 :
297 : struct prefix_sg {
298 : uint8_t family;
299 : uint16_t prefixlen;
300 : struct in_addr src __attribute__((aligned(8)));
301 : struct in_addr grp;
302 : };
303 :
304 : union prefixptr {
305 : prefixtype(prefixptr, struct prefix, p)
306 : prefixtype(prefixptr, struct prefix_ipv4, p4)
307 : prefixtype(prefixptr, struct prefix_ipv6, p6)
308 : prefixtype(prefixptr, struct prefix_evpn, evp)
309 : prefixtype(prefixptr, struct prefix_fs, fs)
310 : prefixtype(prefixptr, struct prefix_rd, rd)
311 : } TRANSPARENT_UNION;
312 :
313 : union prefixconstptr {
314 : prefixtype(prefixconstptr, const struct prefix, p)
315 : prefixtype(prefixconstptr, const struct prefix_ipv4, p4)
316 : prefixtype(prefixconstptr, const struct prefix_ipv6, p6)
317 : prefixtype(prefixconstptr, const struct prefix_evpn, evp)
318 : prefixtype(prefixconstptr, const struct prefix_fs, fs)
319 : prefixtype(prefixconstptr, const struct prefix_rd, rd)
320 : } TRANSPARENT_UNION;
321 :
322 : #ifndef INET_ADDRSTRLEN
323 : #define INET_ADDRSTRLEN 16
324 : #endif /* INET_ADDRSTRLEN */
325 :
326 : #ifndef INET6_ADDRSTRLEN
327 : /* dead:beef:dead:beef:dead:beef:dead:beef + \0 */
328 : #define INET6_ADDRSTRLEN 46
329 : #endif /* INET6_ADDRSTRLEN */
330 :
331 : #ifndef INET6_BUFSIZ
332 : #define INET6_BUFSIZ 53
333 : #endif /* INET6_BUFSIZ */
334 :
335 : /* Maximum string length of the result of prefix2str */
336 : #define PREFIX_STRLEN 80
337 :
338 : /*
339 : * Longest possible length of a (S,G) string is 34 bytes
340 : * 123.123.123.123 = 15 * 2
341 : * (,) = 3
342 : * NULL Character at end = 1
343 : * (123.123.123.123,123.123.123.123)
344 : */
345 : #define PREFIX_SG_STR_LEN 34
346 :
347 : /* Max bit/byte length of IPv4 address. */
348 : #define IPV4_MAX_BYTELEN 4
349 : #define IPV4_MAX_BITLEN 32
350 : #define IPV4_ADDR_CMP(D,S) memcmp ((D), (S), IPV4_MAX_BYTELEN)
351 :
352 120 : static inline bool ipv4_addr_same(const struct in_addr *a,
353 : const struct in_addr *b)
354 : {
355 95 : return (a->s_addr == b->s_addr);
356 : }
357 : #define IPV4_ADDR_SAME(A,B) ipv4_addr_same((A), (B))
358 :
359 4 : static inline void ipv4_addr_copy(struct in_addr *dst,
360 : const struct in_addr *src)
361 : {
362 4 : dst->s_addr = src->s_addr;
363 : }
364 : #define IPV4_ADDR_COPY(D,S) ipv4_addr_copy((D), (S))
365 :
366 : #define IPV4_NET0(a) ((((uint32_t)(a)) & 0xff000000) == 0x00000000)
367 : #define IPV4_NET127(a) ((((uint32_t)(a)) & 0xff000000) == 0x7f000000)
368 : #define IPV4_LINKLOCAL(a) ((((uint32_t)(a)) & 0xffff0000) == 0xa9fe0000)
369 : #define IPV4_CLASS_D(a) ((((uint32_t)(a)) & 0xf0000000) == 0xe0000000)
370 : #define IPV4_CLASS_E(a) ((((uint32_t)(a)) & 0xf0000000) == 0xf0000000)
371 : #define IPV4_CLASS_DE(a) ((((uint32_t)(a)) & 0xe0000000) == 0xe0000000)
372 : #define IPV4_MC_LINKLOCAL(a) ((((uint32_t)(a)) & 0xffffff00) == 0xe0000000)
373 :
374 : /* Max bit/byte length of IPv6 address. */
375 : #define IPV6_MAX_BYTELEN 16
376 : #define IPV6_MAX_BITLEN 128
377 : #define IPV6_ADDR_CMP(D,S) memcmp ((D), (S), IPV6_MAX_BYTELEN)
378 : #define IPV6_ADDR_SAME(D,S) (memcmp ((D), (S), IPV6_MAX_BYTELEN) == 0)
379 : #define IPV6_ADDR_COPY(D,S) memcpy ((D), (S), IPV6_MAX_BYTELEN)
380 :
381 : /* Count prefix size from mask length */
382 : #define PSIZE(a) (((a) + 7) / (8))
383 :
384 : #define BSIZE(a) ((a) * (8))
385 :
386 : /* Prefix's family member. */
387 : #define PREFIX_FAMILY(p) ((p)->family)
388 :
389 : /* glibc defines s6_addr32 to __in6_u.__u6_addr32 if __USE_{MISC || GNU} */
390 : #ifndef s6_addr32
391 : #define s6_addr32 __u6_addr.__u6_addr32
392 : #endif /*s6_addr32*/
393 :
394 : /* Prototypes. */
395 : extern int str2family(const char *);
396 : extern int afi2family(afi_t);
397 : extern afi_t family2afi(int);
398 : extern const char *family2str(int family);
399 : extern const char *safi2str(safi_t safi);
400 : extern const char *afi2str(afi_t afi);
401 :
402 : static inline afi_t prefix_afi(union prefixconstptr pu)
403 : {
404 : return family2afi(pu.p->family);
405 : }
406 :
407 : /*
408 : * Check bit of the prefix.
409 : *
410 : * prefix
411 : * byte buffer
412 : *
413 : * bit_index
414 : * which bit to fetch from byte buffer, 0 indexed.
415 : */
416 : extern unsigned int prefix_bit(const uint8_t *prefix, const uint16_t bit_index);
417 :
418 : extern struct prefix *prefix_new(void);
419 : extern void prefix_free(struct prefix **p);
420 : /*
421 : * Function to handle prefix_free being used as a del function.
422 : */
423 : extern void prefix_free_lists(void *arg);
424 : extern const char *prefix_family_str(union prefixconstptr pu);
425 : extern int prefix_blen(union prefixconstptr pu);
426 : extern int str2prefix(const char *, struct prefix *);
427 :
428 : #define PREFIX2STR_BUFFER PREFIX_STRLEN
429 :
430 : extern void prefix_mcast_inet4_dump(const char *onfail, struct in_addr addr,
431 : char *buf, int buf_size);
432 : extern const char *prefix_sg2str(const struct prefix_sg *sg, char *str);
433 : extern const char *prefix2str(union prefixconstptr, char *, int);
434 : extern int evpn_type5_prefix_match(const struct prefix *evpn_pfx,
435 : const struct prefix *match_pfx);
436 : extern int prefix_match(union prefixconstptr unet, union prefixconstptr upfx);
437 : extern int prefix_match_network_statement(union prefixconstptr unet,
438 : union prefixconstptr upfx);
439 : extern int prefix_same(union prefixconstptr ua, union prefixconstptr ub);
440 : extern int prefix_cmp(union prefixconstptr ua, union prefixconstptr ub);
441 : extern int prefix_common_bits(union prefixconstptr ua, union prefixconstptr ub);
442 : extern void prefix_copy(union prefixptr udst, union prefixconstptr usrc);
443 : extern void apply_mask(union prefixptr pu);
444 :
445 : #ifdef __clang_analyzer__
446 : /* clang-SA doesn't understand transparent unions, making it think that the
447 : * target of prefix_copy is uninitialized. So just memset the target.
448 : * cf. https://bugs.llvm.org/show_bug.cgi?id=42811
449 : */
450 : #define prefix_copy(a, b) ({ memset(a, 0, sizeof(*a)); prefix_copy(a, b); })
451 : #endif
452 :
453 : extern struct prefix *sockunion2hostprefix(const union sockunion *,
454 : struct prefix *p);
455 : extern void prefix2sockunion(const struct prefix *, union sockunion *);
456 :
457 : extern int str2prefix_eth(const char *, struct prefix_eth *);
458 :
459 : extern struct prefix_ipv4 *prefix_ipv4_new(void);
460 : extern void prefix_ipv4_free(struct prefix_ipv4 **p);
461 : extern int str2prefix_ipv4(const char *, struct prefix_ipv4 *);
462 : extern void apply_mask_ipv4(struct prefix_ipv4 *);
463 :
464 : extern int prefix_ipv4_any(const struct prefix_ipv4 *);
465 : extern void apply_classful_mask_ipv4(struct prefix_ipv4 *);
466 :
467 : extern uint8_t ip_masklen(struct in_addr);
468 : extern void masklen2ip(const int, struct in_addr *);
469 : /* given the address of a host on a network and the network mask length,
470 : * calculate the broadcast address for that network;
471 : * special treatment for /31 according to RFC3021 section 3.3 */
472 : extern in_addr_t ipv4_broadcast_addr(in_addr_t hostaddr, int masklen);
473 :
474 : extern int netmask_str2prefix_str(const char *, const char *, char *, size_t);
475 :
476 : extern struct prefix_ipv6 *prefix_ipv6_new(void);
477 : extern void prefix_ipv6_free(struct prefix_ipv6 **p);
478 : extern int str2prefix_ipv6(const char *, struct prefix_ipv6 *);
479 : extern void apply_mask_ipv6(struct prefix_ipv6 *);
480 :
481 : extern int ip6_masklen(struct in6_addr);
482 : extern void masklen2ip6(const int, struct in6_addr *);
483 :
484 : extern int is_zero_mac(const struct ethaddr *mac);
485 : extern bool is_mcast_mac(const struct ethaddr *mac);
486 : extern bool is_bcast_mac(const struct ethaddr *mac);
487 : extern int prefix_str2mac(const char *str, struct ethaddr *mac);
488 : extern char *prefix_mac2str(const struct ethaddr *mac, char *buf, int size);
489 :
490 : extern unsigned prefix_hash_key(const void *pp);
491 :
492 : extern int str_to_esi(const char *str, esi_t *esi);
493 : extern char *esi_to_str(const esi_t *esi, char *buf, int size);
494 : extern char *evpn_es_df_alg2str(uint8_t df_alg, char *buf, int buf_len);
495 : extern void prefix_evpn_hexdump(const struct prefix_evpn *p);
496 : extern bool ipv4_unicast_valid(const struct in_addr *addr);
497 : extern int evpn_prefix2prefix(const struct prefix *evpn, struct prefix *to);
498 :
499 8 : static inline int ipv6_martian(const struct in6_addr *addr)
500 : {
501 8 : struct in6_addr localhost_addr;
502 :
503 8 : inet_pton(AF_INET6, "::1", &localhost_addr);
504 :
505 8 : if (IPV6_ADDR_SAME(&localhost_addr, addr))
506 2 : return 1;
507 :
508 : return 0;
509 : }
510 :
511 : extern int macstr2prefix_evpn(const char *str, struct prefix_evpn *p);
512 :
513 : /* NOTE: This routine expects the address argument in network byte order. */
514 14 : static inline bool ipv4_martian(const struct in_addr *addr)
515 : {
516 14 : in_addr_t ip = ntohl(addr->s_addr);
517 :
518 14 : if (IPV4_NET0(ip) || IPV4_NET127(ip) || !ipv4_unicast_valid(addr)) {
519 2 : return true;
520 : }
521 : return false;
522 : }
523 :
524 29 : static inline bool is_default_prefix4(const struct prefix_ipv4 *p)
525 : {
526 29 : return p && p->family == AF_INET && p->prefixlen == 0
527 0 : && p->prefix.s_addr == INADDR_ANY;
528 : }
529 :
530 16 : static inline bool is_default_prefix6(const struct prefix_ipv6 *p)
531 : {
532 16 : return p && p->family == AF_INET6 && p->prefixlen == 0
533 16 : && memcmp(&p->prefix, &in6addr_any, sizeof(struct in6_addr))
534 : == 0;
535 : }
536 :
537 45 : static inline bool is_default_prefix(const struct prefix *p)
538 : {
539 45 : if (p == NULL)
540 : return false;
541 :
542 45 : switch (p->family) {
543 : case AF_INET:
544 58 : return is_default_prefix4((const struct prefix_ipv4 *)p);
545 16 : case AF_INET6:
546 16 : return is_default_prefix6((const struct prefix_ipv6 *)p);
547 : }
548 :
549 : return false;
550 : }
551 :
552 : static inline int is_host_route(const struct prefix *p)
553 : {
554 : if (p->family == AF_INET)
555 : return (p->prefixlen == IPV4_MAX_BITLEN);
556 : else if (p->family == AF_INET6)
557 : return (p->prefixlen == IPV6_MAX_BITLEN);
558 : return 0;
559 : }
560 :
561 2 : static inline int is_default_host_route(const struct prefix *p)
562 : {
563 2 : if (p->family == AF_INET) {
564 2 : return (p->u.prefix4.s_addr == INADDR_ANY &&
565 0 : p->prefixlen == IPV4_MAX_BITLEN);
566 0 : } else if (p->family == AF_INET6) {
567 0 : return ((!memcmp(&p->u.prefix6, &in6addr_any,
568 0 : sizeof(struct in6_addr))) &&
569 0 : p->prefixlen == IPV6_MAX_BITLEN);
570 : }
571 : return 0;
572 : }
573 :
574 : static inline bool is_ipv6_global_unicast(const struct in6_addr *p)
575 : {
576 : if (IN6_IS_ADDR_UNSPECIFIED(p) || IN6_IS_ADDR_LOOPBACK(p) ||
577 : IN6_IS_ADDR_LINKLOCAL(p) || IN6_IS_ADDR_MULTICAST(p))
578 : return false;
579 :
580 : return true;
581 : }
582 :
583 : /* IPv6 scope values, usable for IPv4 too (cf. below) */
584 : /* clang-format off */
585 : enum {
586 : /* 0: reserved */
587 : MCAST_SCOPE_IFACE = 0x1,
588 : MCAST_SCOPE_LINK = 0x2,
589 : MCAST_SCOPE_REALM = 0x3,
590 : MCAST_SCOPE_ADMIN = 0x4,
591 : MCAST_SCOPE_SITE = 0x5,
592 : /* 6-7: unassigned */
593 : MCAST_SCOPE_ORG = 0x8,
594 : /* 9-d: unassigned */
595 : MCAST_SCOPE_GLOBAL = 0xe,
596 : /* f: reserved */
597 : };
598 : /* clang-format on */
599 :
600 : static inline uint8_t ipv6_mcast_scope(const struct in6_addr *addr)
601 : {
602 : return addr->s6_addr[1] & 0xf;
603 : }
604 :
605 : static inline bool ipv6_mcast_nofwd(const struct in6_addr *addr)
606 : {
607 : return (addr->s6_addr[1] & 0xf) <= MCAST_SCOPE_LINK;
608 : }
609 :
610 : static inline bool ipv6_mcast_ssm(const struct in6_addr *addr)
611 : {
612 : uint32_t bits = ntohl(addr->s6_addr32[0]);
613 :
614 : /* ff3x:0000::/32 */
615 : return (bits & 0xfff0ffff) == 0xff300000;
616 : }
617 :
618 : static inline uint8_t ipv4_mcast_scope(const struct in_addr *addr)
619 : {
620 : uint32_t bits = ntohl(addr->s_addr);
621 :
622 : /* 224.0.0.0/24 - link scope */
623 : if ((bits & 0xffffff00) == 0xe0000000)
624 : return MCAST_SCOPE_LINK;
625 : /* 239.0.0.0/8 - org scope */
626 : if ((bits & 0xff000000) == 0xef000000)
627 : return MCAST_SCOPE_ORG;
628 :
629 : return MCAST_SCOPE_GLOBAL;
630 : }
631 :
632 : static inline bool ipv4_mcast_nofwd(const struct in_addr *addr)
633 : {
634 : uint32_t bits = ntohl(addr->s_addr);
635 :
636 : /* 224.0.0.0/24 */
637 : return (bits & 0xffffff00) == 0xe0000000;
638 : }
639 :
640 : static inline bool ipv4_mcast_ssm(const struct in_addr *addr)
641 : {
642 : uint32_t bits = ntohl(addr->s_addr);
643 :
644 : /* 232.0.0.0/8 */
645 : return (bits & 0xff000000) == 0xe8000000;
646 : }
647 :
648 : #ifdef _FRR_ATTRIBUTE_PRINTFRR
649 : #pragma FRR printfrr_ext "%pEA" (struct ethaddr *)
650 :
651 : #pragma FRR printfrr_ext "%pI4" (struct in_addr *)
652 : #pragma FRR printfrr_ext "%pI4" (in_addr_t *)
653 :
654 : #pragma FRR printfrr_ext "%pI6" (struct in6_addr *)
655 :
656 : #pragma FRR printfrr_ext "%pFX" (struct prefix *)
657 : #pragma FRR printfrr_ext "%pFX" (struct prefix_ipv4 *)
658 : #pragma FRR printfrr_ext "%pFX" (struct prefix_ipv6 *)
659 : #pragma FRR printfrr_ext "%pFX" (struct prefix_eth *)
660 : #pragma FRR printfrr_ext "%pFX" (struct prefix_evpn *)
661 : #pragma FRR printfrr_ext "%pFX" (struct prefix_fs *)
662 : #pragma FRR printfrr_ext "%pRD" (struct prefix_rd *)
663 :
664 : #pragma FRR printfrr_ext "%pPSG4" (struct prefix_sg *)
665 : #endif
666 :
667 : #ifdef __cplusplus
668 : }
669 : #endif
670 :
671 : #endif /* _ZEBRA_PREFIX_H */
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