diff options
Diffstat (limited to 'freebsd/sys/netpfil/ipfw/nat64/nat64_translate.h')
| -rw-r--r-- | freebsd/sys/netpfil/ipfw/nat64/nat64_translate.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/freebsd/sys/netpfil/ipfw/nat64/nat64_translate.h b/freebsd/sys/netpfil/ipfw/nat64/nat64_translate.h new file mode 100644 index 00000000..9f653954 --- /dev/null +++ b/freebsd/sys/netpfil/ipfw/nat64/nat64_translate.h @@ -0,0 +1,116 @@ +/*- + * Copyright (c) 2015-2016 Yandex LLC + * Copyright (c) 2015-2016 Andrey V. Elsukov <ae@FreeBSD.org> + * 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 + |