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5e2444690b
These are necessary to use functions defined in these headers from C++. Signed-off-by: David Lamparter <equinox@diac24.net> Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
124 lines
3.0 KiB
C
124 lines
3.0 KiB
C
/*
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* IP address structure (for generic IPv4 or IPv6 address)
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* Copyright (C) 2016, 2017 Cumulus Networks, Inc.
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*
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* This file is part of FRR.
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*
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* FRR is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* FRR is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with FRR; see the file COPYING. If not, write to the Free
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* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#ifndef __IPADDR_H__
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#define __IPADDR_H__
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#include <zebra.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Generic IP address - union of IPv4 and IPv6 address.
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*/
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enum ipaddr_type_t {
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IPADDR_NONE = 0,
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IPADDR_V4 = 1, /* IPv4 */
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IPADDR_V6 = 2, /* IPv6 */
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};
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struct ipaddr {
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enum ipaddr_type_t ipa_type;
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union {
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uint8_t addr;
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struct in_addr _v4_addr;
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struct in6_addr _v6_addr;
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} ip;
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#define ipaddr_v4 ip._v4_addr
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#define ipaddr_v6 ip._v6_addr
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};
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#define IS_IPADDR_NONE(p) ((p)->ipa_type == IPADDR_NONE)
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#define IS_IPADDR_V4(p) ((p)->ipa_type == IPADDR_V4)
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#define IS_IPADDR_V6(p) ((p)->ipa_type == IPADDR_V6)
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#define SET_IPADDR_V4(p) (p)->ipa_type = IPADDR_V4
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#define SET_IPADDR_V6(p) (p)->ipa_type = IPADDR_V6
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static inline int str2ipaddr(const char *str, struct ipaddr *ip)
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{
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int ret;
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memset(ip, 0, sizeof(struct ipaddr));
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ret = inet_pton(AF_INET, str, &ip->ipaddr_v4);
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if (ret > 0) /* Valid IPv4 address. */
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{
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ip->ipa_type = IPADDR_V4;
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return 0;
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}
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ret = inet_pton(AF_INET6, str, &ip->ipaddr_v6);
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if (ret > 0) /* Valid IPv6 address. */
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{
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ip->ipa_type = IPADDR_V6;
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return 0;
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}
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return -1;
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}
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static inline char *ipaddr2str(struct ipaddr *ip, char *buf, int size)
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{
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buf[0] = '\0';
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if (ip) {
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if (IS_IPADDR_V4(ip))
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inet_ntop(AF_INET, &ip->ip.addr, buf, size);
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else if (IS_IPADDR_V6(ip))
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inet_ntop(AF_INET6, &ip->ip.addr, buf, size);
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}
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return buf;
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}
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/*
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* Convert IPv4 address to IPv4-mapped IPv6 address which is of the
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* form ::FFFF:<IPv4 address> (RFC 4291). This IPv6 address can then
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* be used to represent the IPv4 address, wherever only an IPv6 address
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* is required.
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*/
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static inline void ipv4_to_ipv4_mapped_ipv6(struct in6_addr *in6,
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struct in_addr in)
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{
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uint32_t addr_type = htonl(0xFFFF);
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memset(in6, 0, sizeof(struct in6_addr));
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memcpy((char *)in6 + 8, &addr_type, sizeof(addr_type));
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memcpy((char *)in6 + 12, &in, sizeof(struct in_addr));
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}
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/*
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* convert an ipv4 mapped ipv6 address back to ipv4 address
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*/
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static inline void ipv4_mapped_ipv6_to_ipv4(struct in6_addr *in6,
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struct in_addr *in)
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{
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memset(in, 0, sizeof(struct in_addr));
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memcpy(in, (char *)in6 + 12, sizeof(struct in_addr));
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* __IPADDR_H__ */
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