[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"

#ifndef ETHER_ADDR_LEN
#ifdef ETHERADDRL
#define ETHER_ADDR_LEN  ETHERADDRL
#else
#define ETHER_ADDR_LEN 6
#endif
#endif

#define ETHER_ADDR_STRLEN (3*ETHER_ADDR_LEN)
/*
 * there isn't a portable ethernet address type. We define our
 * own to simplify internal handling
 */
struct ethaddr {
    u_char octet[ETHER_ADDR_LEN];
} __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 flags;
#define IP_ADDR_NONE      0x0
#define IP_ADDR_V4        0x1
#define IP_ADDR_V6        0x2
#define IP_PREFIX_V4      0x4
#define IP_PREFIX_V6      0x8
  struct ethaddr mac;
  uint32_t eth_tag;
  u_char ip_prefix_length;
  union
  {
    u_char addr;
    struct in_addr v4_addr;
    struct in6_addr v6_addr;
  } ip;
};

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

/*
 * 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

/* IPv4 and IPv6 unified 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[8];
    uintptr_t ptr;
    struct evpn_addr prefix_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 */
};

/* 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)
#define IPV4_ADDR_SAME(D,S)  (memcmp ((D), (S), IPV4_MAX_BYTELEN) == 0)
#define IPV4_ADDR_COPY(D,S)  memcpy ((D), (S), IPV4_MAX_BYTELEN)

#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)

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

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 *);

/* 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 (struct prefix *p)
{
  if (!p)
    return 0;

  if (((p->family == AF_INET) && (p->u.prefix4.s_addr == INADDR_ANY))
      || ((p->family == AF_INET6) &&
          !memcmp(&p->u.prefix6, &in6addr_any, sizeof (struct in6_addr))))
    return 1;

  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 LB	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
8cc4198f	34	#include "sockunion.h"
8cc4198f	35
32ac65d9	36	#ifndef ETHER_ADDR_LEN
c215ecaf	37	#ifdef ETHERADDRL
32ac65d9	38	#define ETHER_ADDR_LEN ETHERADDRL
c215ecaf PG	39	#else
	40	#define ETHER_ADDR_LEN 6
	41	#endif
32ac65d9 LB	42	#endif
32ac65d9 LB	43
c215ecaf	44	#define ETHER_ADDR_STRLEN (3*ETHER_ADDR_LEN)
32ac65d9 LB	45	/*
	46	* there isn't a portable ethernet address type. We define our
	47	* own to simplify internal handling
	48	*/
	49	struct ethaddr {
	50	u_char octet[ETHER_ADDR_LEN];
79c0c959	51	} __attribute__ ((packed));
32ac65d9 LB	52
32ac65d9 LB	53
a440846e	54	/* length is the number of valuable bits of prefix structure
	55	* 18 bytes is current length in structure, if address is ipv4
	56	* 30 bytes is in case of ipv6
	57	*/
	58	#define PREFIX_LEN_ROUTE_TYPE_5_IPV4 (18*8)
	59	#define PREFIX_LEN_ROUTE_TYPE_5_IPV6 (30*8)
	60
	61	/* EVPN address (RFC 7432) */
	62	struct evpn_addr
	63	{
	64	u_char route_type;
	65	u_char flags;
	66	#define IP_ADDR_NONE 0x0
	67	#define IP_ADDR_V4 0x1
	68	#define IP_ADDR_V6 0x2
4470c22c PG	69	#define IP_PREFIX_V4 0x4
4470c22c PG	70	#define IP_PREFIX_V6 0x8
a440846e	71	struct ethaddr mac;
	72	uint32_t eth_tag;
	73	u_char ip_prefix_length;
	74	union
	75	{
78b81eaa	76	u_char addr;
a440846e	77	struct in_addr v4_addr;
	78	struct in6_addr v6_addr;
	79	} ip;
	80	};
	81
	82	/* EVPN prefix structure. */
	83	struct prefix_evpn
	84	{
	85	u_char family;
	86	u_char prefixlen;
	87	struct evpn_addr prefix __attribute__ ((aligned (8)));
	88	};
	89
9d24baaa	90	/*
	91	* A struct prefix contains an address family, a prefix length, and an
	92	* address. This can represent either a 'network prefix' as defined
	93	* by CIDR, where the 'host bits' of the prefix are 0
	94	* (e.g. AF_INET:10.0.0.0/8), or an address and netmask
	95	* (e.g. AF_INET:10.0.0.9/8), such as might be configured on an
	96	* interface.
	97	*/
	98
32ac65d9 LB	99	/* different OSes use different names */
	100	#if defined(AF_PACKET)
	101	#define AF_ETHERNET AF_PACKET
	102	#else
	103	#if defined(AF_LINK)
	104	#define AF_ETHERNET AF_LINK
	105	#endif
	106	#endif
	107
718e3744	108	/* IPv4 and IPv6 unified prefix structure. */
	109	struct prefix
	110	{
	111	u_char family;
	112	u_char prefixlen;
	113	union
	114	{
	115	u_char prefix;
	116	struct in_addr prefix4;
718e3744	117	struct in6_addr prefix6;
718e3744	118	struct
	119	{
	120	struct in_addr id;
	121	struct in_addr adv_router;
	122	} lp;
32ac65d9	123	struct ethaddr prefix_eth; /* AF_ETHERNET */
718e3744	124	u_char val[8];
b4b359a2	125	uintptr_t ptr;
a440846e	126	struct evpn_addr prefix_evpn;
718e3744	127	} u __attribute__ ((aligned (8)));
	128	};
	129
	130	/* IPv4 prefix structure. */
	131	struct prefix_ipv4
	132	{
	133	u_char family;
	134	u_char prefixlen;
	135	struct in_addr prefix __attribute__ ((aligned (8)));
	136	};
	137
	138	/* IPv6 prefix structure. */
718e3744	139	struct prefix_ipv6
	140	{
	141	u_char family;
	142	u_char prefixlen;
	143	struct in6_addr prefix __attribute__ ((aligned (8)));
	144	};
718e3744	145
	146	struct prefix_ls
	147	{
	148	u_char family;
	149	u_char prefixlen;
	150	struct in_addr id __attribute__ ((aligned (8)));
	151	struct in_addr adv_router;
	152	};
	153
	154	/* Prefix for routing distinguisher. */
	155	struct prefix_rd
	156	{
	157	u_char family;
	158	u_char prefixlen;
	159	u_char val[8] __attribute__ ((aligned (8)));
	160	};
	161
32ac65d9 LB	162	/* Prefix for ethernet. */
	163	struct prefix_eth
	164	{
	165	u_char family;
	166	u_char prefixlen;
	167	struct ethaddr eth_addr __attribute__ ((aligned (8))); /* AF_ETHERNET */
	168	};
	169
b4b359a2 PM	170	/* Prefix for a generic pointer */
	171	struct prefix_ptr
	172	{
	173	u_char family;
	174	u_char prefixlen;
	175	uintptr_t prefix __attribute__ ((aligned (8)));
	176	};
	177
e9219290 DS	178	struct prefix_sg
	179	{
	180	u_char family;
	181	u_char prefixlen;
	182	struct in_addr src __attribute ((aligned (8)));
	183	struct in_addr grp;
	184	};
	185
f7bf4153 DL	186	/* helper to get type safety/avoid casts on calls
	187	* (w/o this, functions accepting all prefix types need casts on the caller
	188	* side, which strips type safety since the cast will accept any pointer
	189	* type.)
	190	*/
78b81eaa	191	union prefixptr
f7bf4153 DL	192	{
	193	struct prefix *p;
	194	struct prefix_ipv4 *p4;
	195	struct prefix_ipv6 *p6;
78b81eaa	196	struct prefix_evpn *evp;
f7bf4153 DL	197	} __attribute__ ((transparent_union));
f7bf4153 DL	198
78b81eaa	199	union prefixconstptr
f7bf4153 DL	200	{
	201	const struct prefix *p;
	202	const struct prefix_ipv4 *p4;
	203	const struct prefix_ipv6 *p6;
78b81eaa	204	const struct prefix_evpn *evp;
f7bf4153 DL	205	} __attribute__ ((transparent_union));
f7bf4153 DL	206
718e3744	207	#ifndef INET_ADDRSTRLEN
	208	#define INET_ADDRSTRLEN 16
	209	#endif /* INET_ADDRSTRLEN */
	210
	211	#ifndef INET6_ADDRSTRLEN
	212	#define INET6_ADDRSTRLEN 46
	213	#endif /* INET6_ADDRSTRLEN */
	214
	215	#ifndef INET6_BUFSIZ
	216	#define INET6_BUFSIZ 51
	217	#endif /* INET6_BUFSIZ */
	218
855110bb TT	219	/* Maximum prefix string length (IPv6) */
	220	#define PREFIX_STRLEN 51
	221
718e3744	222	/* Max bit/byte length of IPv4 address. */
	223	#define IPV4_MAX_BYTELEN 4
	224	#define IPV4_MAX_BITLEN 32
	225	#define IPV4_MAX_PREFIXLEN 32
	226	#define IPV4_ADDR_CMP(D,S) memcmp ((D), (S), IPV4_MAX_BYTELEN)
	227	#define IPV4_ADDR_SAME(D,S) (memcmp ((D), (S), IPV4_MAX_BYTELEN) == 0)
	228	#define IPV4_ADDR_COPY(D,S) memcpy ((D), (S), IPV4_MAX_BYTELEN)
	229
	230	#define IPV4_NET0(a) ((((u_int32_t) (a)) & 0xff000000) == 0x00000000)
	231	#define IPV4_NET127(a) ((((u_int32_t) (a)) & 0xff000000) == 0x7f000000)
6dc686a2	232	#define IPV4_LINKLOCAL(a) ((((u_int32_t) (a)) & 0xffff0000) == 0xa9fe0000)
733cd9e5	233	#define IPV4_CLASS_DE(a) ((((u_int32_t) (a)) & 0xe0000000) == 0xe0000000)
718e3744	234
	235	/* Max bit/byte length of IPv6 address. */
	236	#define IPV6_MAX_BYTELEN 16
	237	#define IPV6_MAX_BITLEN 128
	238	#define IPV6_MAX_PREFIXLEN 128
	239	#define IPV6_ADDR_CMP(D,S) memcmp ((D), (S), IPV6_MAX_BYTELEN)
	240	#define IPV6_ADDR_SAME(D,S) (memcmp ((D), (S), IPV6_MAX_BYTELEN) == 0)
	241	#define IPV6_ADDR_COPY(D,S) memcpy ((D), (S), IPV6_MAX_BYTELEN)
	242
	243	/* Count prefix size from mask length */
	244	#define PSIZE(a) (((a) + 7) / (8))
	245
cd1964ff DS	246	#define BSIZE(a) ((a) * (8))
cd1964ff DS	247
718e3744	248	/* Prefix's family member. */
	249	#define PREFIX_FAMILY(p) ((p)->family)
	250
5c6ed111 DL	251	/* glibc defines s6_addr32 to __in6_u.__u6_addr32 if __USE_{MISC \|\| GNU} */
	252	#ifndef s6_addr32
	253	#if defined(SUNOS_5)
	254	/* Some SunOS define s6_addr32 only to kernel */
	255	#define s6_addr32 _S6_un._S6_u32
	256	#else
	257	#define s6_addr32 __u6_addr.__u6_addr32
	258	#endif /* SUNOS_5 */
	259	#endif /s6_addr32/
	260
718e3744	261	/* Prototypes. */
f3ccedaa	262	extern int str2family(const char *);
4c9641ba ML	263	extern int afi2family (afi_t);
4c9641ba ML	264	extern afi_t family2afi (int);
1ec23d90	265	extern const char *safi2str(safi_t safi);
32ac65d9	266	extern const char *afi2str(afi_t afi);
8cc4198f	267
f63f06da PJ	268	/* Check bit of the prefix. */
	269	extern unsigned int prefix_bit (const u_char *prefix, const u_char prefixlen);
	270	extern unsigned int prefix6_bit (const struct in6_addr *prefix, const u_char prefixlen);
	271
8cc4198f	272	extern struct prefix *prefix_new (void);
	273	extern void prefix_free (struct prefix *);
	274	extern const char prefix_family_str (const struct prefix );
	275	extern int prefix_blen (const struct prefix *);
	276	extern int str2prefix (const char , struct prefix );
4690c7d7	277
a9ea959f	278	#define PREFIX2STR_BUFFER PREFIX_STRLEN
a9ea959f	279
78b81eaa	280	extern const char prefix2str (union prefixconstptr, char , int);
8cc4198f	281	extern int prefix_match (const struct prefix , const struct prefix );
	282	extern int prefix_same (const struct prefix , const struct prefix );
	283	extern int prefix_cmp (const struct prefix , const struct prefix );
17e52061	284	extern int prefix_common_bits (const struct prefix , const struct prefix );
8cc4198f	285	extern void prefix_copy (struct prefix dest, const struct prefix src);
	286	extern void apply_mask (struct prefix *);
	287
	288	extern struct prefix sockunion2prefix (const union sockunion dest,
	289	const union sockunion *mask);
40ee54a7	290	extern struct prefix sockunion2hostprefix (const union sockunion , struct prefix *p);
17e52061	291	extern void prefix2sockunion (const struct prefix , union sockunion );
8cc4198f	292
32ac65d9 LB	293	extern int str2prefix_eth (const char , struct prefix_eth );
32ac65d9 LB	294
8cc4198f	295	extern struct prefix_ipv4 *prefix_ipv4_new (void);
	296	extern void prefix_ipv4_free (struct prefix_ipv4 *);
	297	extern int str2prefix_ipv4 (const char , struct prefix_ipv4 );
	298	extern void apply_mask_ipv4 (struct prefix_ipv4 *);
	299
e4529636 AS	300	#define PREFIX_COPY_IPV4(DST, SRC) \
	301	((struct prefix_ipv4 )(DST)) = ((const struct prefix_ipv4 )(SRC));
	302
8cc4198f	303	extern int prefix_ipv4_any (const struct prefix_ipv4 *);
	304	extern void apply_classful_mask_ipv4 (struct prefix_ipv4 *);
	305
	306	extern u_char ip_masklen (struct in_addr);
9663386f	307	extern void masklen2ip (const int, struct in_addr *);
3fb9cd6e	308	/* returns the network portion of the host address */
8cc4198f	309	extern in_addr_t ipv4_network_addr (in_addr_t hostaddr, int masklen);
3fb9cd6e	310	/* given the address of a host on a network and the network mask length,
	311	* calculate the broadcast address for that network;
	312	* special treatment for /31: returns the address of the other host
	313	* on the network by flipping the host bit */
8cc4198f	314	extern in_addr_t ipv4_broadcast_addr (in_addr_t hostaddr, int masklen);
3fb9cd6e	315
8cc4198f	316	extern int netmask_str2prefix_str (const char , const char , char *);
718e3744	317
8cc4198f	318	extern struct prefix_ipv6 *prefix_ipv6_new (void);
	319	extern void prefix_ipv6_free (struct prefix_ipv6 *);
	320	extern int str2prefix_ipv6 (const char , struct prefix_ipv6 );
	321	extern void apply_mask_ipv6 (struct prefix_ipv6 *);
718e3744	322
e4529636 AS	323	#define PREFIX_COPY_IPV6(DST, SRC) \
	324	((struct prefix_ipv6 )(DST)) = ((const struct prefix_ipv6 )(SRC));
	325
8cc4198f	326	extern int ip6_masklen (struct in6_addr);
21f569e3	327	extern void masklen2ip6 (const int, struct in6_addr *);
b04c699e	328
8cc4198f	329	extern const char *inet6_ntoa (struct in6_addr);
5920990f	330
db42a173 PG	331	extern int prefix_str2mac(const char str, struct ethaddr mac);
db42a173 PG	332	extern char prefix_mac2str(const struct ethaddr mac, char *buf, int size);
c215ecaf	333
d914d5ff DS	334	static inline int ipv6_martian (struct in6_addr *addr)
	335	{
	336	struct in6_addr localhost_addr;
	337
	338	inet_pton (AF_INET6, "::1", &localhost_addr);
	339
	340	if (IPV6_ADDR_SAME(&localhost_addr, addr))
	341	return 1;
	342
	343	return 0;
	344	}
	345
8cc4198f	346	extern int all_digit (const char *);
718e3744	347
d914d5ff	348	/* NOTE: This routine expects the address argument in network byte order. */
6ee06fa9 PM	349	static inline int ipv4_martian (struct in_addr *addr)
6ee06fa9 PM	350	{
d914d5ff	351	in_addr_t ip = ntohl(addr->s_addr);
6ee06fa9 PM	352
	353	if (IPV4_NET0(ip) \|\| IPV4_NET127(ip) \|\| IPV4_CLASS_DE(ip)) {
	354	return 1;
	355	}
	356	return 0;
	357	}
	358
18ff3edd DS	359	static inline int
	360	is_default_prefix (struct prefix *p)
	361	{
	362	if (!p)
	363	return 0;
	364
	365	if (((p->family == AF_INET) && (p->u.prefix4.s_addr == INADDR_ANY))
	366	\|\| ((p->family == AF_INET6) &&
	367	!memcmp(&p->u.prefix6, &in6addr_any, sizeof (struct in6_addr))))
	368	return 1;
	369
	370	return 0;
	371	}
	372
718e3744	373	#endif /* _ZEBRA_PREFIX_H */