fe9f1a6ded
New data types net_addr and variants (in lib/net.h) describing network addresses (prefix/pxlen). Modifications of FIB structures to handle these data types and changing everything to use these data types instead of prefix/pxlen pairs where possible. The commit is WiP, some protocols are not yet updated (BGP, Kernel), and the code contains some temporary scaffolding. Comments are welcome.
215 lines
5.5 KiB
C
215 lines
5.5 KiB
C
/*
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* BIRD Internet Routing Daemon -- Network addresses
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*
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* (c) 2015 Ondrej Zajicek <santiago@crfreenet.org>
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* (c) 2015 CZ.NIC z.s.p.o.
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#ifndef _BIRD_NET_H_
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#define _BIRD_NET_H_
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#include "lib/ip.h"
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#define NET_IP4 1
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#define NET_IP6 2
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#define NET_VPN4 3
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#define NET_VPN6 4
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#define NET_MAX 5
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typedef struct net_addr {
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u8 type;
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u8 pxlen;
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u16 length;
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u64 align[0];
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u32 space[4];
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} net_addr;
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typedef struct net_addr_ip4 {
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u8 type;
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u8 pxlen;
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u16 length;
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ip4_addr prefix;
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} net_addr_ip4;
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typedef struct net_addr_ip6 {
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u8 type;
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u8 pxlen;
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u16 length;
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ip6_addr prefix;
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} net_addr_ip6;
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typedef struct net_addr_vpn4 {
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u8 type;
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u8 pxlen;
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u16 length;
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ip4_addr prefix;
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u64 rd;
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} net_addr_vpn4;
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typedef struct net_addr_vpn6 {
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u8 type;
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u8 pxlen;
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u16 length;
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ip6_addr prefix;
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u64 rd;
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} net_addr_vpn6;
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typedef union net_addr_union {
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net_addr n;
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net_addr_ip4 ip4;
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net_addr_ip6 ip6;
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net_addr_vpn4 vpn4;
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net_addr_vpn6 vpn6;
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} net_addr_union;
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extern const u16 net_addr_length[];
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#define NET_ADDR_IP4(prefix,pxlen) \
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((net_addr_ip4) { NET_IP4, pxlen, sizeof(net_addr_ip4), prefix })
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#define NET_ADDR_IP6(prefix,pxlen) \
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((net_addr_ip6) { NET_IP6, pxlen, sizeof(net_addr_ip6), prefix })
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#define NET_ADDR_VPN4(prefix,pxlen,rd) \
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((net_addr_vpn4) { NET_VPN4, pxlen, sizeof(net_addr_vpn4), prefix, rd })
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#define NET_ADDR_VPN6(prefix,pxlen,rd) \
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((net_addr_vpn6) { NET_VPN6, pxlen, sizeof(net_addr_vpn6), prefix, rd })
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static inline void net_fill_ip4(net_addr *a, ip4_addr prefix, uint pxlen)
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{ *(net_addr_ip4 *)a = NET_ADDR_IP4(prefix, pxlen); }
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static inline void net_fill_ip6(net_addr *a, ip6_addr prefix, uint pxlen)
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{ *(net_addr_ip6 *)a = NET_ADDR_IP6(prefix, pxlen); }
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static inline void net_fill_vpn4(net_addr *a, ip4_addr prefix, uint pxlen, u64 rd)
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{ *(net_addr_vpn4 *)a = NET_ADDR_VPN4(prefix, pxlen, rd); }
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static inline void net_fill_vpn6(net_addr *a, ip6_addr prefix, uint pxlen, u64 rd)
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{ *(net_addr_vpn6 *)a = NET_ADDR_VPN6(prefix, pxlen, rd); }
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static inline void net_fill_ipa(net_addr *a, ip_addr prefix, uint pxlen)
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{
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if (ipa_is_ip4(prefix))
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net_fill_ip4(a, ipa_to_ip4(prefix), pxlen);
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else
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net_fill_ip6(a, ipa_to_ip6(prefix), pxlen);
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}
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static inline ip4_addr net4_prefix(const net_addr *a)
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{ return ((net_addr_ip4 *) a)->prefix; }
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static inline ip6_addr net6_prefix(const net_addr *a)
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{ return ((net_addr_ip6 *) a)->prefix; }
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static inline ip_addr net_prefix(const net_addr *a)
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{
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switch (a->type)
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{
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case NET_IP4:
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case NET_VPN4: return ipa_from_ip4(net4_prefix(a));
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case NET_IP6:
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case NET_VPN6: return ipa_from_ip6(net6_prefix(a));
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default: return IPA_NONE;
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}
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}
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static inline uint net4_pxlen(const net_addr *a)
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{ return a->pxlen; }
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static inline uint net6_pxlen(const net_addr *a)
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{ return a->pxlen; }
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static inline uint net_pxlen(const net_addr *a)
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{ return a->pxlen; }
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static inline int net_equal(const net_addr *a, const net_addr *b)
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{ return (a->length == b->length) && !memcmp(a, b, a->length); }
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static inline int net_equal_ip4(const net_addr_ip4 *a, const net_addr_ip4 *b)
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{ return !memcmp(a, b, sizeof(net_addr_ip4)); }
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static inline int net_equal_ip6(const net_addr_ip6 *a, const net_addr_ip6 *b)
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{ return !memcmp(a, b, sizeof(net_addr_ip6)); }
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static inline int net_equal_vpn4(const net_addr_vpn4 *a, const net_addr_vpn4 *b)
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{ return !memcmp(a, b, sizeof(net_addr_vpn4)); }
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static inline int net_equal_vpn6(const net_addr_vpn6 *a, const net_addr_vpn6 *b)
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{ return !memcmp(a, b, sizeof(net_addr_vpn6)); }
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static inline int net_zero_ip4(const net_addr_ip4 *a)
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{ return !a->pxlen && ip4_zero(a->prefix); }
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static inline int net_zero_ip6(const net_addr_ip6 *a)
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{ return !a->pxlen && ip6_zero(a->prefix); }
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static inline int net_zero_vpn4(const net_addr_vpn4 *a)
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{ return !a->pxlen && ip4_zero(a->prefix) && !a->rd; }
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static inline int net_zero_vpn6(const net_addr_vpn6 *a)
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{ return !a->pxlen && ip6_zero(a->prefix) && !a->rd; }
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static inline void net_copy(net_addr *dst, const net_addr *src)
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{ memcpy(dst, src, src->length); }
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static inline void net_copy_ip4(net_addr_ip4 *dst, const net_addr_ip4 *src)
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{ memcpy(dst, src, sizeof(net_addr_ip4)); }
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static inline void net_copy_ip6(net_addr_ip6 *dst, const net_addr_ip6 *src)
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{ memcpy(dst, src, sizeof(net_addr_ip6)); }
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static inline void net_copy_vpn4(net_addr_vpn4 *dst, const net_addr_vpn4 *src)
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{ memcpy(dst, src, sizeof(net_addr_vpn4)); }
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static inline void net_copy_vpn6(net_addr_vpn6 *dst, const net_addr_vpn6 *src)
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{ memcpy(dst, src, sizeof(net_addr_vpn6)); }
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static inline u32 net_hash_ip4(const net_addr_ip4 *n)
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{ return ip4_hash(n->prefix) ^ ((u32) n->pxlen << 26); }
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static inline u32 net_hash_ip6(const net_addr_ip6 *n)
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{ return ip6_hash(n->prefix) ^ ((u32) n->pxlen << 26); }
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/* XXXX */
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static inline u32 u64_hash(u32 a)
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{ return u32_hash(a); }
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static inline u32 net_hash_vpn4(const net_addr_vpn4 *n)
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{ return ip4_hash(n->prefix) ^ ((u32) n->pxlen << 26) ^ u64_hash(n->rd); }
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static inline u32 net_hash_vpn6(const net_addr_vpn6 *n)
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{ return ip6_hash(n->prefix) ^ ((u32) n->pxlen << 26) ^ u64_hash(n->rd); }
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static inline void net_normalize_ip4(net_addr_ip4 *n)
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{ n->prefix = ip4_and(n->prefix, ip4_mkmask(n->pxlen)); }
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static inline void net_normalize_ip6(net_addr_ip6 *n)
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{ n->prefix = ip6_and(n->prefix, ip6_mkmask(n->pxlen)); }
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void net_normalize(net_addr *N);
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int net_validate(const net_addr *N);
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int net_classify(const net_addr *N);
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char * net_format(const net_addr *N, char *buf, int buflen);
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#endif
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