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https://git.proxmox.com/git/mirror_frr
synced 2025-05-29 09:44:26 +00:00
92d6f76988
Added a macro to validate the v4 mapped v6 address. Modified bgp receive & send updates for v4 mapped v6 address as nexthop and installing it as recursive nexthop in RIB. Minor change in fpm while sending the routes for nexthop as v4 mapped v6 address. Signed-off-by: Kaushik <kaushik@niralnetworks.com>
143 lines
3.7 KiB
C
143 lines
3.7 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 = AF_UNSPEC,
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IPADDR_V4 = AF_INET,
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IPADDR_V6 = AF_INET6,
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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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#define IPADDRSZ(p) \
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(IS_IPADDR_V4((p)) ? sizeof(struct in_addr) : sizeof(struct in6_addr))
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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(const 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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inet_ntop(ip->ipa_type, &ip->ip.addr, buf, size);
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return buf;
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}
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#define IS_MAPPED_IPV6(A) \
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((A)->s6_addr32[0] == 0x00000000 \
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? ((A)->s6_addr32[1] == 0x00000000 \
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? (ntohl((A)->s6_addr32[2]) == 0xFFFF ? 1 : 0) \
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: 0) \
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: 0)
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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(const 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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/*
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* Check if a struct ipaddr has nonzero value
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*/
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static inline bool ipaddr_isset(struct ipaddr *ip)
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{
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static struct ipaddr a = {};
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return (0 != memcmp(&a, ip, sizeof(struct ipaddr)));
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}
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#ifdef _FRR_ATTRIBUTE_PRINTFRR
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#pragma FRR printfrr_ext "%pIA" (struct ipaddr *)
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#endif
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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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