[mirror_frr.git] / lib / prefix.h

/*
 * Prefix structure.
 * Copyright (C) 1998 Kunihiro Ishiguro
 *
 * This file is part of GNU Zebra.
 *
 * GNU Zebra is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * GNU Zebra is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef _ZEBRA_PREFIX_H
#define _ZEBRA_PREFIX_H

#ifdef SUNOS_5
#include <sys/ethernet.h>
#else
#ifdef GNU_LINUX
#include <net/ethernet.h>
#else
#include <netinet/if_ether.h>
#endif
#endif
#include "sockunion.h"
#include "ipaddr.h"
#include "compiler.h"

#ifndef ETH_ALEN
#define ETH_ALEN 6
#endif

#define ETHER_ADDR_STRLEN (3*ETH_ALEN)
/*
 * there isn't a portable ethernet address type. We define our
 * own to simplify internal handling
 */
struct ethaddr {
	u_char octet[ETH_ALEN];
} __attribute__((packed));


/* length is the number of valuable bits of prefix structure
* 18 bytes is current length in structure, if address is ipv4
* 30 bytes is in case of ipv6
*/
#define PREFIX_LEN_ROUTE_TYPE_5_IPV4 (18*8)
#define PREFIX_LEN_ROUTE_TYPE_5_IPV6 (30*8)

/* EVPN address (RFC 7432) */
struct evpn_addr {
	u_char route_type;
	u_char ip_prefix_length;
	struct ethaddr mac;
	uint32_t eth_tag;
	struct ipaddr ip;
#if 0
  union
  {
    u_char addr;
    struct in_addr v4_addr;
    struct in6_addr v6_addr;
  } ip;
#endif
};

#define IS_EVPN_PREFIX_IPADDR_NONE(evp)  IS_IPADDR_NONE(&(evp)->prefix.ip)
#define IS_EVPN_PREFIX_IPADDR_V4(evp)    IS_IPADDR_V4(&(evp)->prefix.ip)
#define IS_EVPN_PREFIX_IPADDR_V6(evp)    IS_IPADDR_V6(&(evp)->prefix.ip)

/*
 * A struct prefix contains an address family, a prefix length, and an
 * address.  This can represent either a 'network prefix' as defined
 * by CIDR, where the 'host bits' of the prefix are 0
 * (e.g. AF_INET:10.0.0.0/8), or an address and netmask
 * (e.g. AF_INET:10.0.0.9/8), such as might be configured on an
 * interface.
 */

/* different OSes use different names */
#if defined(AF_PACKET)
#define AF_ETHERNET AF_PACKET
#else
#if defined(AF_LINK)
#define AF_ETHERNET AF_LINK
#endif
#endif

/* The 'family' in the prefix structure is internal to FRR and need not
 * map to standard OS AF_ definitions except where needed for interacting
 * with the kernel. However, AF_ definitions are currently in use and
 * prevalent across the code. Define a new FRR-specific AF for EVPN to
 * distinguish between 'ethernet' (MAC-only) and 'evpn' prefixes and
 * ensure it does not conflict with any OS AF_ definition.
 */
#if !defined(AF_EVPN)
#define AF_EVPN (AF_MAX + 1)
#endif

/* FRR generic prefix structure. */
struct prefix {
	u_char family;
	u_char prefixlen;
	union {
		u_char prefix;
		struct in_addr prefix4;
		struct in6_addr prefix6;
		struct {
			struct in_addr id;
			struct in_addr adv_router;
		} lp;
		struct ethaddr prefix_eth; /* AF_ETHERNET */
		u_char val[16];
		uintptr_t ptr;
		struct evpn_addr prefix_evpn; /* AF_EVPN */
	} u __attribute__((aligned(8)));
};

/* IPv4 prefix structure. */
struct prefix_ipv4 {
	u_char family;
	u_char prefixlen;
	struct in_addr prefix __attribute__((aligned(8)));
};

/* IPv6 prefix structure. */
struct prefix_ipv6 {
	u_char family;
	u_char prefixlen;
	struct in6_addr prefix __attribute__((aligned(8)));
};

struct prefix_ls {
	u_char family;
	u_char prefixlen;
	struct in_addr id __attribute__((aligned(8)));
	struct in_addr adv_router;
};

/* Prefix for routing distinguisher. */
struct prefix_rd {
	u_char family;
	u_char prefixlen;
	u_char val[8] __attribute__((aligned(8)));
};

/* Prefix for ethernet. */
struct prefix_eth {
	u_char family;
	u_char prefixlen;
	struct ethaddr eth_addr __attribute__((aligned(8))); /* AF_ETHERNET */
};

/* EVPN prefix structure. */
struct prefix_evpn {
	u_char family;
	u_char prefixlen;
	struct evpn_addr prefix __attribute__((aligned(8)));
};

/* Prefix for a generic pointer */
struct prefix_ptr {
	u_char family;
	u_char prefixlen;
	uintptr_t prefix __attribute__((aligned(8)));
};

struct prefix_sg {
	u_char family;
	u_char prefixlen;
	struct in_addr src __attribute__((aligned(8)));
	struct in_addr grp;
};

/* helper to get type safety/avoid casts on calls
 * (w/o this, functions accepting all prefix types need casts on the caller
 * side, which strips type safety since the cast will accept any pointer
 * type.)
 */
union prefixptr {
	struct prefix *p;
	struct prefix_ipv4 *p4;
	struct prefix_ipv6 *p6;
	struct prefix_evpn *evp;
} __attribute__((transparent_union));

union prefixconstptr {
	const struct prefix *p;
	const struct prefix_ipv4 *p4;
	const struct prefix_ipv6 *p6;
	const struct prefix_evpn *evp;
} __attribute__((transparent_union));

#ifndef INET_ADDRSTRLEN
#define INET_ADDRSTRLEN 16
#endif /* INET_ADDRSTRLEN */

#ifndef INET6_ADDRSTRLEN
#define INET6_ADDRSTRLEN 46
#endif /* INET6_ADDRSTRLEN */

#ifndef INET6_BUFSIZ
#define INET6_BUFSIZ 51
#endif /* INET6_BUFSIZ */

/* Maximum prefix string length (IPv6) */
#define PREFIX_STRLEN 51

/* Max bit/byte length of IPv4 address. */
#define IPV4_MAX_BYTELEN    4
#define IPV4_MAX_BITLEN    32
#define IPV4_MAX_PREFIXLEN 32
#define IPV4_ADDR_CMP(D,S)   memcmp ((D), (S), IPV4_MAX_BYTELEN)

static inline bool ipv4_addr_same(const struct in_addr *a,
				  const struct in_addr *b)
{
	return (a->s_addr == b->s_addr);
}
#define IPV4_ADDR_SAME(A,B)  ipv4_addr_same((A), (B))

static inline void ipv4_addr_copy(struct in_addr *dst,
				  const struct in_addr *src)
{
	dst->s_addr = src->s_addr;
}
#define IPV4_ADDR_COPY(D,S)  ipv4_addr_copy((D), (S))

#define IPV4_NET0(a)    ((((u_int32_t) (a)) & 0xff000000) == 0x00000000)
#define IPV4_NET127(a)  ((((u_int32_t) (a)) & 0xff000000) == 0x7f000000)
#define IPV4_LINKLOCAL(a) ((((u_int32_t) (a)) & 0xffff0000) == 0xa9fe0000)
#define IPV4_CLASS_DE(a)  ((((u_int32_t) (a)) & 0xe0000000) == 0xe0000000)
#define IPV4_MC_LINKLOCAL(a)  ((((u_int32_t) (a)) & 0xffffff00) == 0xe0000000)

/* Max bit/byte length of IPv6 address. */
#define IPV6_MAX_BYTELEN    16
#define IPV6_MAX_BITLEN    128
#define IPV6_MAX_PREFIXLEN 128
#define IPV6_ADDR_CMP(D,S)   memcmp ((D), (S), IPV6_MAX_BYTELEN)
#define IPV6_ADDR_SAME(D,S)  (memcmp ((D), (S), IPV6_MAX_BYTELEN) == 0)
#define IPV6_ADDR_COPY(D,S)  memcpy ((D), (S), IPV6_MAX_BYTELEN)

/* Count prefix size from mask length */
#define PSIZE(a) (((a) + 7) / (8))

#define BSIZE(a) ((a) * (8))

/* Prefix's family member. */
#define PREFIX_FAMILY(p)  ((p)->family)

/* glibc defines s6_addr32 to __in6_u.__u6_addr32 if __USE_{MISC || GNU} */
#ifndef s6_addr32
#if defined(SUNOS_5)
/* Some SunOS define s6_addr32 only to kernel */
#define s6_addr32 _S6_un._S6_u32
#else
#define s6_addr32 __u6_addr.__u6_addr32
#endif /* SUNOS_5 */
#endif /*s6_addr32*/

/* Prototypes. */
extern int str2family(const char *);
extern int afi2family(afi_t);
extern afi_t family2afi(int);
extern const char *safi2str(safi_t safi);
extern const char *afi2str(afi_t afi);

/* Check bit of the prefix. */
extern unsigned int prefix_bit(const u_char *prefix, const u_char prefixlen);
extern unsigned int prefix6_bit(const struct in6_addr *prefix,
				const u_char prefixlen);

extern struct prefix *prefix_new(void);
extern void prefix_free(struct prefix *);
extern const char *prefix_family_str(const struct prefix *);
extern int prefix_blen(const struct prefix *);
extern int str2prefix(const char *, struct prefix *);

#define PREFIX2STR_BUFFER  PREFIX_STRLEN

extern const char *prefix2str(union prefixconstptr, char *, int);
extern int prefix_match(const struct prefix *, const struct prefix *);
extern int prefix_match_network_statement(const struct prefix *,
					  const struct prefix *);
extern int prefix_same(const struct prefix *, const struct prefix *);
extern int prefix_cmp(const struct prefix *, const struct prefix *);
extern int prefix_common_bits(const struct prefix *, const struct prefix *);
extern void prefix_copy(struct prefix *dest, const struct prefix *src);
extern void apply_mask(struct prefix *);

extern struct prefix *sockunion2prefix(const union sockunion *dest,
				       const union sockunion *mask);
extern struct prefix *sockunion2hostprefix(const union sockunion *,
					   struct prefix *p);
extern void prefix2sockunion(const struct prefix *, union sockunion *);

extern int str2prefix_eth(const char *, struct prefix_eth *);

extern struct prefix_ipv4 *prefix_ipv4_new(void);
extern void prefix_ipv4_free(struct prefix_ipv4 *);
extern int str2prefix_ipv4(const char *, struct prefix_ipv4 *);
extern void apply_mask_ipv4(struct prefix_ipv4 *);

#define PREFIX_COPY(DST, SRC)                                        \
	*((struct prefix *)(DST)) = *((const struct prefix *)(SRC))
#define PREFIX_COPY_IPV4(DST, SRC)                                   \
	*((struct prefix_ipv4 *)(DST)) = *((const struct prefix_ipv4 *)(SRC));

extern int prefix_ipv4_any(const struct prefix_ipv4 *);
extern void apply_classful_mask_ipv4(struct prefix_ipv4 *);

extern u_char ip_masklen(struct in_addr);
extern void masklen2ip(const int, struct in_addr *);
/* returns the network portion of the host address */
extern in_addr_t ipv4_network_addr(in_addr_t hostaddr, int masklen);
/* given the address of a host on a network and the network mask length,
 * calculate the broadcast address for that network;
 * special treatment for /31: returns the address of the other host
 * on the network by flipping the host bit */
extern in_addr_t ipv4_broadcast_addr(in_addr_t hostaddr, int masklen);

extern int netmask_str2prefix_str(const char *, const char *, char *);

extern struct prefix_ipv6 *prefix_ipv6_new(void);
extern void prefix_ipv6_free(struct prefix_ipv6 *);
extern int str2prefix_ipv6(const char *, struct prefix_ipv6 *);
extern void apply_mask_ipv6(struct prefix_ipv6 *);

#define PREFIX_COPY_IPV6(DST, SRC)                                             \
	*((struct prefix_ipv6 *)(DST)) = *((const struct prefix_ipv6 *)(SRC));

extern int ip6_masklen(struct in6_addr);
extern void masklen2ip6(const int, struct in6_addr *);

extern const char *inet6_ntoa(struct in6_addr);

extern int is_zero_mac(struct ethaddr *mac);
extern int prefix_str2mac(const char *str, struct ethaddr *mac);
extern char *prefix_mac2str(const struct ethaddr *mac, char *buf, int size);

extern unsigned prefix_hash_key(void *pp);

static inline int ipv6_martian(struct in6_addr *addr)
{
	struct in6_addr localhost_addr;

	inet_pton(AF_INET6, "::1", &localhost_addr);

	if (IPV6_ADDR_SAME(&localhost_addr, addr))
		return 1;

	return 0;
}

extern int all_digit(const char *);
extern int macstr2prefix_evpn(const char *str, struct prefix_evpn *p);

/* NOTE: This routine expects the address argument in network byte order. */
static inline int ipv4_martian(struct in_addr *addr)
{
	in_addr_t ip = ntohl(addr->s_addr);

	if (IPV4_NET0(ip) || IPV4_NET127(ip) || IPV4_CLASS_DE(ip)) {
		return 1;
	}
	return 0;
}

static inline int is_default_prefix(const struct prefix *p)
{
	if (!p)
		return 0;

	if ((p->family == AF_INET) &&
	    (p->u.prefix4.s_addr == INADDR_ANY) &&
	    (p->prefixlen == 0))
		return 1;

	if ((p->family == AF_INET6) &&
	    (p->prefixlen == 0) &&
	    (!memcmp(&p->u.prefix6, &in6addr_any,
		     sizeof(struct in6_addr))))
		return 1;

	return 0;
}

static inline int is_host_route(struct prefix *p)
{
	if (p->family == AF_INET)
		return (p->prefixlen == IPV4_MAX_BITLEN);
	else if (p->family == AF_INET6)
		return (p->prefixlen == IPV6_MAX_BITLEN);
	return 0;
}

#endif /* _ZEBRA_PREFIX_H */
Commit	Line	Data
718e3744	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	*
896014f4 DL	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
718e3744	20	*/
	21
	22	#ifndef _ZEBRA_PREFIX_H
	23	#define _ZEBRA_PREFIX_H
	24
32ac65d9	25	#ifdef SUNOS_5
d62a17ae	26	#include <sys/ethernet.h>
32ac65d9	27	#else
d62a17ae	28	#ifdef GNU_LINUX
	29	#include <net/ethernet.h>
	30	#else
	31	#include <netinet/if_ether.h>
	32	#endif
32ac65d9	33	#endif
8cc4198f	34	#include "sockunion.h"
86f1ef44	35	#include "ipaddr.h"
de1a880c	36	#include "compiler.h"
8cc4198f	37
7628d862 DS	38	#ifndef ETH_ALEN
	39	#define ETH_ALEN 6
	40	#endif
	41
7628d862	42	#define ETHER_ADDR_STRLEN (3*ETH_ALEN)
32ac65d9 LB	43	/*
	44	* there isn't a portable ethernet address type. We define our
	45	* own to simplify internal handling
	46	*/
	47	struct ethaddr {
7628d862	48	u_char octet[ETH_ALEN];
d62a17ae	49	} __attribute__((packed));
32ac65d9 LB	50
32ac65d9 LB	51
d62a17ae	52	/* length is the number of valuable bits of prefix structure
9d303b37 DL	53	* 18 bytes is current length in structure, if address is ipv4
	54	* 30 bytes is in case of ipv6
	55	*/
a440846e	56	#define PREFIX_LEN_ROUTE_TYPE_5_IPV4 (18*8)
	57	#define PREFIX_LEN_ROUTE_TYPE_5_IPV6 (30*8)
	58
	59	/* EVPN address (RFC 7432) */
d62a17ae	60	struct evpn_addr {
	61	u_char route_type;
	62	u_char ip_prefix_length;
	63	struct ethaddr mac;
	64	uint32_t eth_tag;
	65	struct ipaddr ip;
86f1ef44	66	#if 0
a440846e	67	union
a440846e	68	{
78b81eaa	69	u_char addr;
a440846e	70	struct in_addr v4_addr;
	71	struct in6_addr v6_addr;
	72	} ip;
86f1ef44	73	#endif
a440846e	74	};
a440846e	75
86f1ef44	76	#define IS_EVPN_PREFIX_IPADDR_NONE(evp) IS_IPADDR_NONE(&(evp)->prefix.ip)
	77	#define IS_EVPN_PREFIX_IPADDR_V4(evp) IS_IPADDR_V4(&(evp)->prefix.ip)
	78	#define IS_EVPN_PREFIX_IPADDR_V6(evp) IS_IPADDR_V6(&(evp)->prefix.ip)
a440846e	79
9d24baaa	80	/*
	81	* A struct prefix contains an address family, a prefix length, and an
	82	* address. This can represent either a 'network prefix' as defined
	83	* by CIDR, where the 'host bits' of the prefix are 0
	84	* (e.g. AF_INET:10.0.0.0/8), or an address and netmask
	85	* (e.g. AF_INET:10.0.0.9/8), such as might be configured on an
	86	* interface.
	87	*/
	88
32ac65d9 LB	89	/* different OSes use different names */
	90	#if defined(AF_PACKET)
	91	#define AF_ETHERNET AF_PACKET
	92	#else
	93	#if defined(AF_LINK)
	94	#define AF_ETHERNET AF_LINK
	95	#endif
	96	#endif
	97
b03b8898 DS	98	/* The 'family' in the prefix structure is internal to FRR and need not
	99	* map to standard OS AF_ definitions except where needed for interacting
	100	* with the kernel. However, AF_ definitions are currently in use and
	101	* prevalent across the code. Define a new FRR-specific AF for EVPN to
	102	* distinguish between 'ethernet' (MAC-only) and 'evpn' prefixes and
	103	* ensure it does not conflict with any OS AF_ definition.
	104	*/
	105	#if !defined(AF_EVPN)
	106	#define AF_EVPN (AF_MAX + 1)
	107	#endif
	108
	109	/* FRR generic prefix structure. */
d62a17ae	110	struct prefix {
	111	u_char family;
	112	u_char prefixlen;
	113	union {
	114	u_char prefix;
	115	struct in_addr prefix4;
	116	struct in6_addr prefix6;
	117	struct {
	118	struct in_addr id;
	119	struct in_addr adv_router;
	120	} lp;
	121	struct ethaddr prefix_eth; /* AF_ETHERNET */
d440e3db	122	u_char val[16];
d62a17ae	123	uintptr_t ptr;
b03b8898	124	struct evpn_addr prefix_evpn; /* AF_EVPN */
d62a17ae	125	} u __attribute__((aligned(8)));
718e3744	126	};
	127
	128	/* IPv4 prefix structure. */
d62a17ae	129	struct prefix_ipv4 {
	130	u_char family;
	131	u_char prefixlen;
	132	struct in_addr prefix __attribute__((aligned(8)));
718e3744	133	};
	134
	135	/* IPv6 prefix structure. */
d62a17ae	136	struct prefix_ipv6 {
	137	u_char family;
	138	u_char prefixlen;
	139	struct in6_addr prefix __attribute__((aligned(8)));
718e3744	140	};
718e3744	141
d62a17ae	142	struct prefix_ls {
	143	u_char family;
	144	u_char prefixlen;
	145	struct in_addr id __attribute__((aligned(8)));
	146	struct in_addr adv_router;
718e3744	147	};
	148
	149	/* Prefix for routing distinguisher. */
d62a17ae	150	struct prefix_rd {
	151	u_char family;
	152	u_char prefixlen;
	153	u_char val[8] __attribute__((aligned(8)));
718e3744	154	};
718e3744	155
32ac65d9	156	/* Prefix for ethernet. */
d62a17ae	157	struct prefix_eth {
	158	u_char family;
	159	u_char prefixlen;
	160	struct ethaddr eth_addr __attribute__((aligned(8))); /* AF_ETHERNET */
32ac65d9 LB	161	};
32ac65d9 LB	162
86f1ef44	163	/* EVPN prefix structure. */
d62a17ae	164	struct prefix_evpn {
	165	u_char family;
	166	u_char prefixlen;
	167	struct evpn_addr prefix __attribute__((aligned(8)));
86f1ef44	168	};
86f1ef44	169
b4b359a2	170	/* Prefix for a generic pointer */
d62a17ae	171	struct prefix_ptr {
	172	u_char family;
	173	u_char prefixlen;
	174	uintptr_t prefix __attribute__((aligned(8)));
b4b359a2 PM	175	};
b4b359a2 PM	176
d62a17ae	177	struct prefix_sg {
	178	u_char family;
	179	u_char prefixlen;
	180	struct in_addr src __attribute__((aligned(8)));
	181	struct in_addr grp;
e9219290 DS	182	};
e9219290 DS	183
f7bf4153 DL	184	/* helper to get type safety/avoid casts on calls
	185	* (w/o this, functions accepting all prefix types need casts on the caller
	186	* side, which strips type safety since the cast will accept any pointer
	187	* type.)
	188	*/
d62a17ae	189	union prefixptr {
	190	struct prefix *p;
	191	struct prefix_ipv4 *p4;
	192	struct prefix_ipv6 *p6;
	193	struct prefix_evpn *evp;
	194	} __attribute__((transparent_union));
	195
	196	union prefixconstptr {
	197	const struct prefix *p;
	198	const struct prefix_ipv4 *p4;
	199	const struct prefix_ipv6 *p6;
	200	const struct prefix_evpn *evp;
	201	} __attribute__((transparent_union));
f7bf4153	202
718e3744	203	#ifndef INET_ADDRSTRLEN
	204	#define INET_ADDRSTRLEN 16
	205	#endif /* INET_ADDRSTRLEN */
	206
	207	#ifndef INET6_ADDRSTRLEN
	208	#define INET6_ADDRSTRLEN 46
	209	#endif /* INET6_ADDRSTRLEN */
	210
	211	#ifndef INET6_BUFSIZ
	212	#define INET6_BUFSIZ 51
	213	#endif /* INET6_BUFSIZ */
	214
855110bb TT	215	/* Maximum prefix string length (IPv6) */
	216	#define PREFIX_STRLEN 51
	217
718e3744	218	/* Max bit/byte length of IPv4 address. */
	219	#define IPV4_MAX_BYTELEN 4
	220	#define IPV4_MAX_BITLEN 32
	221	#define IPV4_MAX_PREFIXLEN 32
	222	#define IPV4_ADDR_CMP(D,S) memcmp ((D), (S), IPV4_MAX_BYTELEN)
19aad877 JB	223
	224	static inline bool ipv4_addr_same(const struct in_addr *a,
	225	const struct in_addr *b)
	226	{
	227	return (a->s_addr == b->s_addr);
	228	}
	229	#define IPV4_ADDR_SAME(A,B) ipv4_addr_same((A), (B))
	230
	231	static inline void ipv4_addr_copy(struct in_addr *dst,
	232	const struct in_addr *src)
	233	{
	234	dst->s_addr = src->s_addr;
	235	}
	236	#define IPV4_ADDR_COPY(D,S) ipv4_addr_copy((D), (S))
718e3744	237
	238	#define IPV4_NET0(a) ((((u_int32_t) (a)) & 0xff000000) == 0x00000000)
	239	#define IPV4_NET127(a) ((((u_int32_t) (a)) & 0xff000000) == 0x7f000000)
6dc686a2	240	#define IPV4_LINKLOCAL(a) ((((u_int32_t) (a)) & 0xffff0000) == 0xa9fe0000)
733cd9e5	241	#define IPV4_CLASS_DE(a) ((((u_int32_t) (a)) & 0xe0000000) == 0xe0000000)
4d9ad5dc	242	#define IPV4_MC_LINKLOCAL(a) ((((u_int32_t) (a)) & 0xffffff00) == 0xe0000000)
718e3744	243
	244	/* Max bit/byte length of IPv6 address. */
	245	#define IPV6_MAX_BYTELEN 16
	246	#define IPV6_MAX_BITLEN 128
	247	#define IPV6_MAX_PREFIXLEN 128
	248	#define IPV6_ADDR_CMP(D,S) memcmp ((D), (S), IPV6_MAX_BYTELEN)
	249	#define IPV6_ADDR_SAME(D,S) (memcmp ((D), (S), IPV6_MAX_BYTELEN) == 0)
	250	#define IPV6_ADDR_COPY(D,S) memcpy ((D), (S), IPV6_MAX_BYTELEN)
	251
	252	/* Count prefix size from mask length */
	253	#define PSIZE(a) (((a) + 7) / (8))
	254
cd1964ff DS	255	#define BSIZE(a) ((a) * (8))
cd1964ff DS	256
718e3744	257	/* Prefix's family member. */
	258	#define PREFIX_FAMILY(p) ((p)->family)
	259
5c6ed111 DL	260	/* glibc defines s6_addr32 to __in6_u.__u6_addr32 if __USE_{MISC \|\| GNU} */
	261	#ifndef s6_addr32
	262	#if defined(SUNOS_5)
	263	/* Some SunOS define s6_addr32 only to kernel */
	264	#define s6_addr32 _S6_un._S6_u32
	265	#else
	266	#define s6_addr32 __u6_addr.__u6_addr32
	267	#endif /* SUNOS_5 */
	268	#endif /s6_addr32/
	269
718e3744	270	/* Prototypes. */
f3ccedaa	271	extern int str2family(const char *);
d62a17ae	272	extern int afi2family(afi_t);
d62a17ae	273	extern afi_t family2afi(int);
1ec23d90	274	extern const char *safi2str(safi_t safi);
32ac65d9	275	extern const char *afi2str(afi_t afi);
8cc4198f	276
f63f06da	277	/* Check bit of the prefix. */
d62a17ae	278	extern unsigned int prefix_bit(const u_char *prefix, const u_char prefixlen);
	279	extern unsigned int prefix6_bit(const struct in6_addr *prefix,
	280	const u_char prefixlen);
f63f06da	281
d62a17ae	282	extern struct prefix *prefix_new(void);
	283	extern void prefix_free(struct prefix *);
	284	extern const char prefix_family_str(const struct prefix );
	285	extern int prefix_blen(const struct prefix *);
	286	extern int str2prefix(const char , struct prefix );
4690c7d7	287
a9ea959f	288	#define PREFIX2STR_BUFFER PREFIX_STRLEN
a9ea959f	289
d62a17ae	290	extern const char prefix2str(union prefixconstptr, char , int);
	291	extern int prefix_match(const struct prefix , const struct prefix );
	292	extern int prefix_match_network_statement(const struct prefix *,
	293	const struct prefix *);
	294	extern int prefix_same(const struct prefix , const struct prefix );
	295	extern int prefix_cmp(const struct prefix , const struct prefix );
	296	extern int prefix_common_bits(const struct prefix , const struct prefix );
	297	extern void prefix_copy(struct prefix dest, const struct prefix src);
	298	extern void apply_mask(struct prefix *);
	299
	300	extern struct prefix sockunion2prefix(const union sockunion dest,
	301	const union sockunion *mask);
	302	extern struct prefix sockunion2hostprefix(const union sockunion ,
	303	struct prefix *p);
	304	extern void prefix2sockunion(const struct prefix , union sockunion );
	305
	306	extern int str2prefix_eth(const char , struct prefix_eth );
	307
	308	extern struct prefix_ipv4 *prefix_ipv4_new(void);
	309	extern void prefix_ipv4_free(struct prefix_ipv4 *);
	310	extern int str2prefix_ipv4(const char , struct prefix_ipv4 );
	311	extern void apply_mask_ipv4(struct prefix_ipv4 *);
	312
72a1b201 DS	313	#define PREFIX_COPY(DST, SRC) \
	314	((struct prefix )(DST)) = ((const struct prefix )(SRC))
	315	#define PREFIX_COPY_IPV4(DST, SRC) \
e4529636 AS	316	((struct prefix_ipv4 )(DST)) = ((const struct prefix_ipv4 )(SRC));
e4529636 AS	317
d62a17ae	318	extern int prefix_ipv4_any(const struct prefix_ipv4 *);
d62a17ae	319	extern void apply_classful_mask_ipv4(struct prefix_ipv4 *);
8cc4198f	320
d62a17ae	321	extern u_char ip_masklen(struct in_addr);
d62a17ae	322	extern void masklen2ip(const int, struct in_addr *);
3fb9cd6e	323	/* returns the network portion of the host address */
d62a17ae	324	extern in_addr_t ipv4_network_addr(in_addr_t hostaddr, int masklen);
3fb9cd6e	325	/* given the address of a host on a network and the network mask length,
	326	* calculate the broadcast address for that network;
	327	* special treatment for /31: returns the address of the other host
	328	* on the network by flipping the host bit */
d62a17ae	329	extern in_addr_t ipv4_broadcast_addr(in_addr_t hostaddr, int masklen);
3fb9cd6e	330
d62a17ae	331	extern int netmask_str2prefix_str(const char , const char , char *);
718e3744	332
d62a17ae	333	extern struct prefix_ipv6 *prefix_ipv6_new(void);
	334	extern void prefix_ipv6_free(struct prefix_ipv6 *);
	335	extern int str2prefix_ipv6(const char , struct prefix_ipv6 );
	336	extern void apply_mask_ipv6(struct prefix_ipv6 *);
718e3744	337
d62a17ae	338	#define PREFIX_COPY_IPV6(DST, SRC) \
e4529636 AS	339	((struct prefix_ipv6 )(DST)) = ((const struct prefix_ipv6 )(SRC));
e4529636 AS	340
d62a17ae	341	extern int ip6_masklen(struct in6_addr);
d62a17ae	342	extern void masklen2ip6(const int, struct in6_addr *);
b04c699e	343
d62a17ae	344	extern const char *inet6_ntoa(struct in6_addr);
5920990f	345
523cafc4	346	extern int is_zero_mac(struct ethaddr *mac);
db42a173 PG	347	extern int prefix_str2mac(const char str, struct ethaddr mac);
db42a173 PG	348	extern char prefix_mac2str(const struct ethaddr mac, char *buf, int size);
c215ecaf	349
7a7761d2 CF	350	extern unsigned prefix_hash_key(void *pp);
7a7761d2 CF	351
d62a17ae	352	static inline int ipv6_martian(struct in6_addr *addr)
d914d5ff	353	{
d62a17ae	354	struct in6_addr localhost_addr;
d914d5ff	355
d62a17ae	356	inet_pton(AF_INET6, "::1", &localhost_addr);
d914d5ff	357
d62a17ae	358	if (IPV6_ADDR_SAME(&localhost_addr, addr))
d62a17ae	359	return 1;
d914d5ff	360
d62a17ae	361	return 0;
d914d5ff DS	362	}
d914d5ff DS	363
d62a17ae	364	extern int all_digit(const char *);
d37ba549	365	extern int macstr2prefix_evpn(const char str, struct prefix_evpn p);
718e3744	366
d914d5ff	367	/* NOTE: This routine expects the address argument in network byte order. */
d62a17ae	368	static inline int ipv4_martian(struct in_addr *addr)
6ee06fa9	369	{
d62a17ae	370	in_addr_t ip = ntohl(addr->s_addr);
6ee06fa9	371
d62a17ae	372	if (IPV4_NET0(ip) \|\| IPV4_NET127(ip) \|\| IPV4_CLASS_DE(ip)) {
	373	return 1;
	374	}
	375	return 0;
6ee06fa9 PM	376	}
6ee06fa9 PM	377
f229873a	378	static inline int is_default_prefix(const struct prefix *p)
18ff3edd	379	{
d62a17ae	380	if (!p)
d62a17ae	381	return 0;
18ff3edd	382
f229873a DS	383	if ((p->family == AF_INET) &&
	384	(p->u.prefix4.s_addr == INADDR_ANY) &&
	385	(p->prefixlen == 0))
	386	return 1;
	387
	388	if ((p->family == AF_INET6) &&
	389	(p->prefixlen == 0) &&
	390	(!memcmp(&p->u.prefix6, &in6addr_any,
	391	sizeof(struct in6_addr))))
d62a17ae	392	return 1;
18ff3edd	393
d62a17ae	394	return 0;
18ff3edd DS	395	}
18ff3edd DS	396
408b00c4 MK	397	static inline int is_host_route(struct prefix *p)
	398	{
	399	if (p->family == AF_INET)
	400	return (p->prefixlen == IPV4_MAX_BITLEN);
	401	else if (p->family == AF_INET6)
	402	return (p->prefixlen == IPV6_MAX_BITLEN);
	403	return 0;
	404	}
	405
718e3744	406	#endif /* _ZEBRA_PREFIX_H */