Differential D19561 Diff 54975 sys/netpfil/ipfw/nat64/nat64stl.c

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sys/netpfil/ipfw/nat64/nat64stl.c

This file was copied to sys/netpfil/ipfw/nat64/nat64clat.c.

/*-		/*-
* Copyright (c) 2015-2016 Yandex LLC		* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
* Copyright (c) 2015-2016 Andrey V. Elsukov <ae@FreeBSD.org>
* All rights reserved.
*		*
		* Copyright (c) 2015-2019 Yandex LLC
		* Copyright (c) 2015-2019 Andrey V. Elsukov <ae@FreeBSD.org>
		*
* Redistribution and use in source and binary forms, with or without		* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions		* modification, are permitted provided that the following conditions
* are met:		* are met:
*		*
* 1. Redistributions of source code must retain the above copyright		* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.		* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright		* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the		* notice, this list of conditions and the following disclaimer in the
Show All 24 Lines
#include <sys/rmlock.h>		#include <sys/rmlock.h>
#include <sys/rwlock.h>		#include <sys/rwlock.h>
#include <sys/socket.h>		#include <sys/socket.h>
#include <sys/sysctl.h>		#include <sys/sysctl.h>

#include <net/if.h>		#include <net/if.h>
#include <net/if_var.h>		#include <net/if_var.h>
#include <net/if_pflog.h>		#include <net/if_pflog.h>
#include <net/pfil.h>

#include <netinet/in.h>		#include <netinet/in.h>
#include <netinet/ip.h>		#include <netinet/ip.h>
#include <netinet/ip_icmp.h>		#include <netinet/ip_icmp.h>
#include <netinet/ip_var.h>		#include <netinet/ip_var.h>
#include <netinet/ip_fw.h>		#include <netinet/ip_fw.h>
#include <netinet/ip6.h>		#include <netinet/ip6.h>
#include <netinet/icmp6.h>		#include <netinet/icmp6.h>
Show All 39 Lines	if (nat64_check_ip4(ip->ip_src.s_addr) != 0 \|\|
nat64_check_ip4(ip->ip_dst.s_addr) != 0 \|\|		nat64_check_ip4(ip->ip_dst.s_addr) != 0 \|\|
nat64_check_private_ip4(&cfg->base, ip->ip_src.s_addr) != 0 \|\|		nat64_check_private_ip4(&cfg->base, ip->ip_src.s_addr) != 0 \|\|
nat64_check_private_ip4(&cfg->base, ip->ip_dst.s_addr) != 0)		nat64_check_private_ip4(&cfg->base, ip->ip_dst.s_addr) != 0)
return (NAT64SKIP);		return (NAT64SKIP);

daddr = TARG_VAL(chain, tablearg, nh6);		daddr = TARG_VAL(chain, tablearg, nh6);
if (nat64_check_ip6(&daddr) != 0)		if (nat64_check_ip6(&daddr) != 0)
return (NAT64MFREE);		return (NAT64MFREE);
nat64_embed_ip4(&cfg->base, ip->ip_src.s_addr, &saddr);
		saddr = cfg->base.plat_prefix;
		nat64_embed_ip4(&saddr, cfg->base.plat_plen, ip->ip_src.s_addr);
if (cfg->base.flags & NAT64_LOG) {		if (cfg->base.flags & NAT64_LOG) {
logdata = &loghdr;		logdata = &loghdr;
nat64stl_log(logdata, m, AF_INET, cfg->no.kidx);		nat64stl_log(logdata, m, AF_INET, cfg->no.kidx);
} else		} else
logdata = NULL;		logdata = NULL;
return (nat64_do_handle_ip4(m, &saddr, &daddr, 0, &cfg->base,		return (nat64_do_handle_ip4(m, &saddr, &daddr, 0, &cfg->base,
logdata));		logdata));
}		}

static int		static int
nat64stl_handle_ip6(struct ip_fw_chain chain, struct nat64stl_cfg cfg,		nat64stl_handle_ip6(struct ip_fw_chain chain, struct nat64stl_cfg cfg,
struct mbuf *m, uint32_t tablearg)		struct mbuf *m, uint32_t tablearg)
{		{
struct pfloghdr loghdr, *logdata;		struct pfloghdr loghdr, *logdata;
struct ip6_hdr *ip6;		struct ip6_hdr *ip6;
uint32_t aaddr;		uint32_t aaddr;

aaddr = htonl(TARG_VAL(chain, tablearg, nh4));		aaddr = htonl(TARG_VAL(chain, tablearg, nh4));
		if (nat64_check_private_ip4(&cfg->base, aaddr) != 0) {
		NAT64STAT_INC(&cfg->base.stats, dropped);
		return (NAT64MFREE);
		}
/*		/*
* NOTE: we expect ipfw_chk() did m_pullup() up to upper level		* NOTE: we expect ipfw_chk() did m_pullup() up to upper level
* protocol's headers. Also we skip some checks, that ip6_input(),		* protocol's headers. Also we skip some checks, that ip6_input(),
* ip6_forward(), ip6_fastfwd() and ipfw_chk() already did.		* ip6_forward(), ip6_fastfwd() and ipfw_chk() already did.
*/		*/
ip6 = mtod(m, struct ip6_hdr *);		ip6 = mtod(m, struct ip6_hdr *);
/* Check ip6_dst matches configured prefix */		/* Check ip6_dst matches configured prefix */
if (bcmp(&ip6->ip6_dst, &cfg->base.prefix6, cfg->base.plen6 / 8) != 0)		if (memcmp(&ip6->ip6_dst, &cfg->base.plat_prefix,
		cfg->base.plat_plen / 8) != 0)
return (NAT64SKIP);		return (NAT64SKIP);

if (cfg->base.flags & NAT64_LOG) {		if (cfg->base.flags & NAT64_LOG) {
logdata = &loghdr;		logdata = &loghdr;
nat64stl_log(logdata, m, AF_INET6, cfg->no.kidx);		nat64stl_log(logdata, m, AF_INET6, cfg->no.kidx);
} else		} else
logdata = NULL;		logdata = NULL;
return (nat64_do_handle_ip6(m, aaddr, 0, &cfg->base, logdata));		return (nat64_do_handle_ip6(m, aaddr, 0, &cfg->base, logdata));
▲ Show 20 Lines • Show All 41 Lines • ▼ Show 20 Lines	nat64stl_handle_icmp6(struct ip_fw_chain chain, struct nat64stl_cfg cfg,
}		}
/*		/*
* Use destination address from inner IPv6 header to determine		* Use destination address from inner IPv6 header to determine
* IPv4 mapped address.		* IPv4 mapped address.
*/		*/
ip6i = mtodo(m, hlen);		ip6i = mtodo(m, hlen);
if (ipfw_lookup_table(chain, cfg->map64,		if (ipfw_lookup_table(chain, cfg->map64,
sizeof(struct in6_addr), &ip6i->ip6_dst, &tablearg) == 0) {		sizeof(struct in6_addr), &ip6i->ip6_dst, &tablearg) == 0) {
m_freem(m);		NAT64STAT_INC(stats, dropped);
return (NAT64RETURN);		return (NAT64MFREE);
}		}
if (cfg->base.flags & NAT64_LOG) {		if (cfg->base.flags & NAT64_LOG) {
logdata = &loghdr;		logdata = &loghdr;
nat64stl_log(logdata, m, AF_INET6, cfg->no.kidx);		nat64stl_log(logdata, m, AF_INET6, cfg->no.kidx);
} else		} else
logdata = NULL;		logdata = NULL;
return (nat64_handle_icmp6(m, 0,		return (nat64_handle_icmp6(m, 0,
htonl(TARG_VAL(chain, tablearg, nh4)), 0, &cfg->base, logdata));		htonl(TARG_VAL(chain, tablearg, nh4)), 0, &cfg->base, logdata));
▲ Show 20 Lines • Show All 52 Lines • ▼ Show 20 Lines	ipfw_nat64stl(struct ip_fw_chain chain, struct ip_fw_args args,
}		}
if (ret == NAT64SKIP)		if (ret == NAT64SKIP)
return (0);		return (0);

done = 1; / terminate the search */		done = 1; / terminate the search */
if (ret == NAT64MFREE)		if (ret == NAT64MFREE)
m_freem(args->m);		m_freem(args->m);
args->m = NULL;		args->m = NULL;
return (IP_FW_DENY);		return (IP_FW_NAT64);
}		}