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
18 * along with GNU Zebra; see the file COPYING.  If not, write to the Free
19 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20 * 02111-1307, USA.
21 */
22
23#ifndef _ZEBRA_PREFIX_H
24#define _ZEBRA_PREFIX_H
25
26/* IPv4 and IPv6 unified prefix structure. */
27struct prefix
28{
29  u_char family;
30  u_char prefixlen;
31  union
32  {
33    u_char prefix;
34    struct in_addr prefix4;
35#ifdef HAVE_IPV6
36    struct in6_addr prefix6;
37#endif /* HAVE_IPV6 */
38    struct
39    {
40      struct in_addr id;
41      struct in_addr adv_router;
42    } lp;
43    u_char val[8];
44  } u __attribute__ ((aligned (8)));
45};
46
47/* IPv4 prefix structure. */
48struct prefix_ipv4
49{
50  u_char family;
51  u_char prefixlen;
52  struct in_addr prefix __attribute__ ((aligned (8)));
53};
54
55/* IPv6 prefix structure. */
56#ifdef HAVE_IPV6
57struct prefix_ipv6
58{
59  u_char family;
60  u_char prefixlen;
61  struct in6_addr prefix __attribute__ ((aligned (8)));
62};
63#endif /* HAVE_IPV6 */
64
65struct prefix_ls
66{
67  u_char family;
68  u_char prefixlen;
69  struct in_addr id __attribute__ ((aligned (8)));
70  struct in_addr adv_router;
71};
72
73/* Prefix for routing distinguisher. */
74struct prefix_rd
75{
76  u_char family;
77  u_char prefixlen;
78  u_char val[8] __attribute__ ((aligned (8)));
79};
80
81#ifndef INET_ADDRSTRLEN
82#define INET_ADDRSTRLEN 16
83#endif /* INET_ADDRSTRLEN */
84
85#ifndef INET6_ADDRSTRLEN
86#define INET6_ADDRSTRLEN 46
87#endif /* INET6_ADDRSTRLEN */
88
89#ifndef INET6_BUFSIZ
90#define INET6_BUFSIZ 51
91#endif /* INET6_BUFSIZ */
92
93/* Max bit/byte length of IPv4 address. */
94#define IPV4_MAX_BYTELEN    4
95#define IPV4_MAX_BITLEN    32
96#define IPV4_MAX_PREFIXLEN 32
97#define IPV4_ADDR_CMP(D,S)   memcmp ((D), (S), IPV4_MAX_BYTELEN)
98#define IPV4_ADDR_SAME(D,S)  (memcmp ((D), (S), IPV4_MAX_BYTELEN) == 0)
99#define IPV4_ADDR_COPY(D,S)  memcpy ((D), (S), IPV4_MAX_BYTELEN)
100
101#define IPV4_NET0(a)    ((((u_int32_t) (a)) & 0xff000000) == 0x00000000)
102#define IPV4_NET127(a)  ((((u_int32_t) (a)) & 0xff000000) == 0x7f000000)
103
104/* Max bit/byte length of IPv6 address. */
105#define IPV6_MAX_BYTELEN    16
106#define IPV6_MAX_BITLEN    128
107#define IPV6_MAX_PREFIXLEN 128
108#define IPV6_ADDR_CMP(D,S)   memcmp ((D), (S), IPV6_MAX_BYTELEN)
109#define IPV6_ADDR_SAME(D,S)  (memcmp ((D), (S), IPV6_MAX_BYTELEN) == 0)
110#define IPV6_ADDR_COPY(D,S)  memcpy ((D), (S), IPV6_MAX_BYTELEN)
111
112/* Count prefix size from mask length */
113#define PSIZE(a) (((a) + 7) / (8))
114
115/* Prefix's family member. */
116#define PREFIX_FAMILY(p)  ((p)->family)
117
118/* Prototypes. */
119int afi2family (int);
120int family2afi (int);
121
122int prefix2str (struct prefix *, char *, int);
123int str2prefix (char *, struct prefix *);
124struct prefix *prefix_new ();
125void prefix_free (struct prefix *p);
126
127struct prefix_ipv4 *prefix_ipv4_new ();
128void prefix_ipv4_free ();
129int str2prefix_ipv4 (char *, struct prefix_ipv4 *);
130void apply_mask_ipv4 (struct prefix_ipv4 *);
131int prefix_blen (struct prefix *);
132u_char ip_masklen (struct in_addr);
133int prefix_ipv4_any (struct prefix_ipv4 *);
134void masklen2ip (int, struct in_addr *);
135void apply_classful_mask_ipv4 (struct prefix_ipv4 *);
136
137char *prefix_family_str (struct prefix *p);
138struct prefix *sockunion2prefix ();
139struct prefix *sockunion2hostprefix ();
140
141#ifdef HAVE_IPV6
142struct prefix_ipv6 *prefix_ipv6_new ();
143void prefix_ipv6_free ();
144struct prefix *str2routev6 (char *);
145int str2prefix_ipv6 (char *str, struct prefix_ipv6 *p);
146void apply_mask_ipv6 (struct prefix_ipv6 *p);
147void str2in6_addr (char *str, struct in6_addr *addr);
148void masklen2ip6 (int masklen, struct in6_addr *netmask);
149int ip6_masklen (struct in6_addr netmask);
150#endif /* HAVE_IPV6 */
151
152void apply_mask (struct prefix *);
153int prefix_match (struct prefix *n, struct prefix *p);
154int prefix_same (struct prefix *, struct prefix *);
155int prefix_cmp (struct prefix *, struct prefix *);
156void prefix_copy (struct prefix *, struct prefix *);
157
158int all_digit (char *);
159int netmask_str2prefix_str (char *, char *, char *);
160
161#endif /* _ZEBRA_PREFIX_H */
162