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2 * IP address structure (for generic IPv4 or IPv6 address)
3 * Copyright (C) 2016, 2017 Cumulus Networks, Inc.
5 * This file is part of FRR.
7 * FRR 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
12 * FRR 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.
17 * You should have received a copy of the GNU General Public License
18 * along with FRR; see the file COPYING. If not, write to the Free
19 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
29 * Generic IP address - union of IPv4 and IPv6 address.
33 IPADDR_V4
= 1, /* IPv4 */
34 IPADDR_V6
= 2, /* IPv6 */
38 enum ipaddr_type_t ipa_type
;
41 struct in_addr _v4_addr
;
42 struct in6_addr _v6_addr
;
44 #define ipaddr_v4 ip._v4_addr
45 #define ipaddr_v6 ip._v6_addr
48 #define IS_IPADDR_NONE(p) ((p)->ipa_type == IPADDR_NONE)
49 #define IS_IPADDR_V4(p) ((p)->ipa_type == IPADDR_V4)
50 #define IS_IPADDR_V6(p) ((p)->ipa_type == IPADDR_V6)
52 #define SET_IPADDR_V4(p) (p)->ipa_type = IPADDR_V4
53 #define SET_IPADDR_V6(p) (p)->ipa_type = IPADDR_V6
55 static inline int str2ipaddr(const char *str
, struct ipaddr
*ip
)
59 memset(ip
, 0, sizeof(struct ipaddr
));
61 ret
= inet_pton(AF_INET
, str
, &ip
->ipaddr_v4
);
62 if (ret
> 0) /* Valid IPv4 address. */
64 ip
->ipa_type
= IPADDR_V4
;
67 ret
= inet_pton(AF_INET6
, str
, &ip
->ipaddr_v6
);
68 if (ret
> 0) /* Valid IPv6 address. */
70 ip
->ipa_type
= IPADDR_V6
;
77 static inline char *ipaddr2str(struct ipaddr
*ip
, char *buf
, int size
)
82 inet_ntop(AF_INET
, &ip
->ip
.addr
, buf
, size
);
83 else if (IS_IPADDR_V6(ip
))
84 inet_ntop(AF_INET6
, &ip
->ip
.addr
, buf
, size
);
90 * Convert IPv4 address to IPv4-mapped IPv6 address which is of the
91 * form ::FFFF:<IPv4 address> (RFC 4291). This IPv6 address can then
92 * be used to represent the IPv4 address, wherever only an IPv6 address
95 static inline void ipv4_to_ipv4_mapped_ipv6(struct in6_addr
*in6
,
98 uint32_t addr_type
= htonl(0xFFFF);
100 memset(in6
, 0, sizeof(struct in6_addr
));
101 memcpy((char *)in6
+ 8, &addr_type
, sizeof(addr_type
));
102 memcpy((char *)in6
+ 12, &in
, sizeof(struct in_addr
));
106 * convert an ipv4 mapped ipv6 address back to ipv4 address
108 static inline void ipv4_mapped_ipv6_to_ipv4(struct in6_addr
*in6
,
111 memset(in
, 0, sizeof(struct in_addr
));
112 memcpy(in
, (char *)in6
+ 12, sizeof(struct in_addr
));
115 #endif /* __IPADDR_H__ */