prefix.h
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上传日期:2009-11-15
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- /*
- * 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 GNU Zebra; see the file COPYING. If not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
- */
- #ifndef _ZEBRA_PREFIX_H
- #define _ZEBRA_PREFIX_H
- /* IPv4 and IPv6 unified prefix structure. */
- struct prefix
- {
- u_char family;
- u_char prefixlen;
- union
- {
- u_char prefix;
- struct in_addr prefix4;
- #ifdef HAVE_IPV6
- struct in6_addr prefix6;
- #endif /* HAVE_IPV6 */
- struct
- {
- struct in_addr id;
- struct in_addr adv_router;
- } lp;
- u_char val[8];
- } 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. */
- #ifdef HAVE_IPV6
- struct prefix_ipv6
- {
- u_char family;
- u_char prefixlen;
- struct in6_addr prefix __attribute__ ((aligned (8)));
- };
- #endif /* HAVE_IPV6 */
- 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)));
- };
- #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 */
- /* 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)
- /* 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))
- /* Prefix's family member. */
- #define PREFIX_FAMILY(p) ((p)->family)
- /* Prototypes. */
- int afi2family (int);
- int family2afi (int);
- int prefix2str (struct prefix *, char *, int);
- int str2prefix (char *, struct prefix *);
- struct prefix *prefix_new ();
- void prefix_free (struct prefix *p);
- struct prefix_ipv4 *prefix_ipv4_new ();
- void prefix_ipv4_free ();
- int str2prefix_ipv4 (char *, struct prefix_ipv4 *);
- void apply_mask_ipv4 (struct prefix_ipv4 *);
- int prefix_blen (struct prefix *);
- u_char ip_masklen (struct in_addr);
- int prefix_ipv4_any (struct prefix_ipv4 *);
- void masklen2ip (int, struct in_addr *);
- void apply_classful_mask_ipv4 (struct prefix_ipv4 *);
- char *prefix_family_str (struct prefix *p);
- struct prefix *sockunion2prefix ();
- struct prefix *sockunion2hostprefix ();
- #ifdef HAVE_IPV6
- struct prefix_ipv6 *prefix_ipv6_new ();
- void prefix_ipv6_free ();
- struct prefix *str2routev6 (char *);
- int str2prefix_ipv6 (char *str, struct prefix_ipv6 *p);
- void apply_mask_ipv6 (struct prefix_ipv6 *p);
- void str2in6_addr (char *str, struct in6_addr *addr);
- void masklen2ip6 (int masklen, struct in6_addr *netmask);
- int ip6_masklen (struct in6_addr netmask);
- #endif /* HAVE_IPV6 */
- void apply_mask (struct prefix *);
- int prefix_match (struct prefix *n, struct prefix *p);
- int prefix_same (struct prefix *, struct prefix *);
- int prefix_cmp (struct prefix *, struct prefix *);
- void prefix_copy (struct prefix *, struct prefix *);
- int all_digit (char *);
- int netmask_str2prefix_str (char *, char *, char *);
- #endif /* _ZEBRA_PREFIX_H */