/*- * Copyright (c) 2015-2016 Yandex LLC * Copyright (c) 2015-2016 Andrey V. Elsukov * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * $FreeBSD$ */ #ifndef _IP_FW_NAT64_TRANSLATE_H_ #define _IP_FW_NAT64_TRANSLATE_H_ #ifdef RTALLOC_NOLOCK #define IN_LOOKUP_ROUTE(ro, fib) rtalloc_fib_nolock((ro), 0, (fib)) #define IN6_LOOKUP_ROUTE(ro, fib) in6_rtalloc_nolock((ro), (fib)) #define FREE_ROUTE(ro) #else #define IN_LOOKUP_ROUTE(ro, fib) rtalloc_ign_fib((ro), 0, (fib)) #define IN6_LOOKUP_ROUTE(ro, fib) in6_rtalloc((ro), (fib)) #define FREE_ROUTE(ro) RO_RTFREE((ro)) #endif static inline int nat64_check_ip6(struct in6_addr *addr) { /* XXX: We should really check /8 */ if (addr->s6_addr16[0] == 0 || /* 0000::/8 Reserved by IETF */ IN6_IS_ADDR_MULTICAST(addr) || IN6_IS_ADDR_LINKLOCAL(addr)) return (1); return (0); } extern int nat64_allow_private; static inline int nat64_check_private_ip4(in_addr_t ia) { if (nat64_allow_private) return (0); /* WKPFX must not be used to represent non-global IPv4 addresses */ // if (cfg->flags & NAT64_WKPFX) { /* IN_PRIVATE */ if ((ia & htonl(0xff000000)) == htonl(0x0a000000) || (ia & htonl(0xfff00000)) == htonl(0xac100000) || (ia & htonl(0xffff0000)) == htonl(0xc0a80000)) return (1); /* * RFC 5735: * 192.0.0.0/24 - reserved for IETF protocol assignments * 192.88.99.0/24 - for use as 6to4 relay anycast addresses * 198.18.0.0/15 - for use in benchmark tests * 192.0.2.0/24, 198.51.100.0/24, 203.0.113.0/24 - for use * in documentation and example code */ if ((ia & htonl(0xffffff00)) == htonl(0xc0000000) || (ia & htonl(0xffffff00)) == htonl(0xc0586300) || (ia & htonl(0xfffffe00)) == htonl(0xc6120000) || (ia & htonl(0xffffff00)) == htonl(0xc0000200) || (ia & htonl(0xfffffe00)) == htonl(0xc6336400) || (ia & htonl(0xffffff00)) == htonl(0xcb007100)) return (1); // } return (0); } static inline int nat64_check_ip4(in_addr_t ia) { /* IN_LOOPBACK */ if ((ia & htonl(0xff000000)) == htonl(0x7f000000)) return (1); /* IN_LINKLOCAL */ if ((ia & htonl(0xffff0000)) == htonl(0xa9fe0000)) return (1); /* IN_MULTICAST & IN_EXPERIMENTAL */ if ((ia & htonl(0xe0000000)) == htonl(0xe0000000)) return (1); return (0); } #define nat64_get_ip4(_ip6) ((_ip6)->s6_addr32[3]) #define nat64_set_ip4(_ip6, _ip4) (_ip6)->s6_addr32[3] = (_ip4) int nat64_getlasthdr(struct mbuf *m, int *offset); int nat64_do_handle_ip4(struct mbuf *m, struct in6_addr *saddr, struct in6_addr *daddr, uint16_t lport, nat64_stats_block *stats, void *logdata); int nat64_do_handle_ip6(struct mbuf *m, uint32_t aaddr, uint16_t aport, nat64_stats_block *stats, void *logdata); int nat64_handle_icmp6(struct mbuf *m, int hlen, uint32_t aaddr, uint16_t aport, nat64_stats_block *stats, void *logdata); #endif