}
int ip6_route_me_harder(struct net *net, struct sk_buff *skb);
+
+static inline int nf_ip6_route_me_harder(struct net *net, struct sk_buff *skb)
+{
+#if IS_MODULE(CONFIG_IPV6)
+ const struct nf_ipv6_ops *v6_ops = nf_get_ipv6_ops();
+
+ if (!v6_ops)
+ return -EHOSTUNREACH;
+
+ return v6_ops->route_me_harder(net, skb);
+#else
+ return ip6_route_me_harder(net, skb);
+#endif
+}
+
__sum16 nf_ip6_checksum(struct sk_buff *skb, unsigned int hook,
unsigned int dataoff, u_int8_t protocol);
int __init nft_chain_filter_init(void);
void nft_chain_filter_fini(void);
+void __init nft_chain_route_init(void);
+void nft_chain_route_fini(void);
#endif /* _NET_NF_TABLES_H */
if NF_TABLES_IPV4
-config NFT_CHAIN_ROUTE_IPV4
- tristate "IPv4 nf_tables route chain support"
- help
- This option enables the "route" chain for IPv4 in nf_tables. This
- chain type is used to force packet re-routing after mangling header
- fields such as the source, destination, type of service and
- the packet mark.
-
config NFT_REJECT_IPV4
select NF_REJECT_IPV4
default NFT_REJECT
$(obj)/nf_nat_snmp_basic_main.o: $(obj)/nf_nat_snmp_basic.asn1.h
obj-$(CONFIG_NF_NAT_SNMP_BASIC) += nf_nat_snmp_basic.o
-obj-$(CONFIG_NFT_CHAIN_ROUTE_IPV4) += nft_chain_route_ipv4.o
obj-$(CONFIG_NFT_REJECT_IPV4) += nft_reject_ipv4.o
obj-$(CONFIG_NFT_FIB_IPV4) += nft_fib_ipv4.o
obj-$(CONFIG_NFT_DUP_IPV4) += nft_dup_ipv4.o
+++ /dev/null
-/*
- * Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
- * Copyright (c) 2012 Pablo Neira Ayuso <pablo@netfilter.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/skbuff.h>
-#include <linux/netlink.h>
-#include <linux/netfilter.h>
-#include <linux/netfilter_ipv4.h>
-#include <linux/netfilter/nfnetlink.h>
-#include <linux/netfilter/nf_tables.h>
-#include <net/netfilter/nf_tables.h>
-#include <net/netfilter/nf_tables_ipv4.h>
-#include <net/route.h>
-#include <net/ip.h>
-
-static unsigned int nf_route_table_hook(void *priv,
- struct sk_buff *skb,
- const struct nf_hook_state *state)
-{
- unsigned int ret;
- struct nft_pktinfo pkt;
- u32 mark;
- __be32 saddr, daddr;
- u_int8_t tos;
- const struct iphdr *iph;
- int err;
-
- nft_set_pktinfo(&pkt, skb, state);
- nft_set_pktinfo_ipv4(&pkt, skb);
-
- mark = skb->mark;
- iph = ip_hdr(skb);
- saddr = iph->saddr;
- daddr = iph->daddr;
- tos = iph->tos;
-
- ret = nft_do_chain(&pkt, priv);
- if (ret != NF_DROP && ret != NF_STOLEN) {
- iph = ip_hdr(skb);
-
- if (iph->saddr != saddr ||
- iph->daddr != daddr ||
- skb->mark != mark ||
- iph->tos != tos) {
- err = ip_route_me_harder(state->net, skb, RTN_UNSPEC);
- if (err < 0)
- ret = NF_DROP_ERR(err);
- }
- }
- return ret;
-}
-
-static const struct nft_chain_type nft_chain_route_ipv4 = {
- .name = "route",
- .type = NFT_CHAIN_T_ROUTE,
- .family = NFPROTO_IPV4,
- .owner = THIS_MODULE,
- .hook_mask = (1 << NF_INET_LOCAL_OUT),
- .hooks = {
- [NF_INET_LOCAL_OUT] = nf_route_table_hook,
- },
-};
-
-static int __init nft_chain_route_init(void)
-{
- nft_register_chain_type(&nft_chain_route_ipv4);
-
- return 0;
-}
-
-static void __exit nft_chain_route_exit(void)
-{
- nft_unregister_chain_type(&nft_chain_route_ipv4);
-}
-
-module_init(nft_chain_route_init);
-module_exit(nft_chain_route_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
-MODULE_ALIAS_NFT_CHAIN(AF_INET, "route");
if NF_TABLES_IPV6
-config NFT_CHAIN_ROUTE_IPV6
- tristate "IPv6 nf_tables route chain support"
- help
- This option enables the "route" chain for IPv6 in nf_tables. This
- chain type is used to force packet re-routing after mangling header
- fields such as the source, destination, flowlabel, hop-limit and
- the packet mark.
-
config NFT_REJECT_IPV6
select NF_REJECT_IPV6
default NFT_REJECT
obj-$(CONFIG_NF_DUP_IPV6) += nf_dup_ipv6.o
# nf_tables
-obj-$(CONFIG_NFT_CHAIN_ROUTE_IPV6) += nft_chain_route_ipv6.o
obj-$(CONFIG_NFT_REJECT_IPV6) += nft_reject_ipv6.o
obj-$(CONFIG_NFT_DUP_IPV6) += nft_dup_ipv6.o
obj-$(CONFIG_NFT_FIB_IPV6) += nft_fib_ipv6.o
+++ /dev/null
-/*
- * Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
- * Copyright (c) 2012 Pablo Neira Ayuso <pablo@netfilter.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Development of this code funded by Astaro AG (http://www.astaro.com/)
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/skbuff.h>
-#include <linux/netlink.h>
-#include <linux/netfilter.h>
-#include <linux/netfilter_ipv6.h>
-#include <linux/netfilter/nfnetlink.h>
-#include <linux/netfilter/nf_tables.h>
-#include <net/netfilter/nf_tables.h>
-#include <net/netfilter/nf_tables_ipv6.h>
-#include <net/route.h>
-
-static unsigned int nf_route_table_hook(void *priv,
- struct sk_buff *skb,
- const struct nf_hook_state *state)
-{
- unsigned int ret;
- struct nft_pktinfo pkt;
- struct in6_addr saddr, daddr;
- u_int8_t hop_limit;
- u32 mark, flowlabel;
- int err;
-
- nft_set_pktinfo(&pkt, skb, state);
- nft_set_pktinfo_ipv6(&pkt, skb);
-
- /* save source/dest address, mark, hoplimit, flowlabel, priority */
- memcpy(&saddr, &ipv6_hdr(skb)->saddr, sizeof(saddr));
- memcpy(&daddr, &ipv6_hdr(skb)->daddr, sizeof(daddr));
- mark = skb->mark;
- hop_limit = ipv6_hdr(skb)->hop_limit;
-
- /* flowlabel and prio (includes version, which shouldn't change either */
- flowlabel = *((u32 *)ipv6_hdr(skb));
-
- ret = nft_do_chain(&pkt, priv);
- if (ret != NF_DROP && ret != NF_STOLEN &&
- (memcmp(&ipv6_hdr(skb)->saddr, &saddr, sizeof(saddr)) ||
- memcmp(&ipv6_hdr(skb)->daddr, &daddr, sizeof(daddr)) ||
- skb->mark != mark ||
- ipv6_hdr(skb)->hop_limit != hop_limit ||
- flowlabel != *((u_int32_t *)ipv6_hdr(skb)))) {
- err = ip6_route_me_harder(state->net, skb);
- if (err < 0)
- ret = NF_DROP_ERR(err);
- }
-
- return ret;
-}
-
-static const struct nft_chain_type nft_chain_route_ipv6 = {
- .name = "route",
- .type = NFT_CHAIN_T_ROUTE,
- .family = NFPROTO_IPV6,
- .owner = THIS_MODULE,
- .hook_mask = (1 << NF_INET_LOCAL_OUT),
- .hooks = {
- [NF_INET_LOCAL_OUT] = nf_route_table_hook,
- },
-};
-
-static int __init nft_chain_route_init(void)
-{
- nft_register_chain_type(&nft_chain_route_ipv6);
-
- return 0;
-}
-
-static void __exit nft_chain_route_exit(void)
-{
- nft_unregister_chain_type(&nft_chain_route_ipv6);
-}
-
-module_init(nft_chain_route_init);
-module_exit(nft_chain_route_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
-MODULE_ALIAS_NFT_CHAIN(AF_INET6, "route");
nf_tables-objs := nf_tables_core.o nf_tables_api.o nft_chain_filter.o \
nf_tables_trace.o nft_immediate.o nft_cmp.o nft_range.o \
nft_bitwise.o nft_byteorder.o nft_payload.o nft_lookup.o \
- nft_dynset.o nft_meta.o nft_rt.o nft_exthdr.o
+ nft_dynset.o nft_meta.o nft_rt.o nft_exthdr.o \
+ nft_chain_route.o
nf_tables_set-objs := nf_tables_set_core.o \
nft_set_hash.o nft_set_bitmap.o nft_set_rbtree.o
return ret;
}
-static int nat_route_me_harder(struct net *net, struct sk_buff *skb)
-{
-#ifdef CONFIG_IPV6_MODULE
- const struct nf_ipv6_ops *v6_ops = nf_get_ipv6_ops();
-
- if (!v6_ops)
- return -EHOSTUNREACH;
-
- return v6_ops->route_me_harder(net, skb);
-#else
- return ip6_route_me_harder(net, skb);
-#endif
-}
-
static unsigned int
nf_nat_ipv6_local_fn(void *priv, struct sk_buff *skb,
const struct nf_hook_state *state)
if (!nf_inet_addr_cmp(&ct->tuplehash[dir].tuple.dst.u3,
&ct->tuplehash[!dir].tuple.src.u3)) {
- err = nat_route_me_harder(state->net, skb);
+ err = nf_ip6_route_me_harder(state->net, skb);
if (err < 0)
ret = NF_DROP_ERR(err);
}
if (err < 0)
goto err5;
+ nft_chain_route_init();
return err;
err5:
rhltable_destroy(&nft_objname_ht);
nfnetlink_subsys_unregister(&nf_tables_subsys);
unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
nft_chain_filter_fini();
+ nft_chain_route_fini();
unregister_pernet_subsys(&nf_tables_net_ops);
cancel_work_sync(&trans_destroy_work);
rcu_barrier();
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/skbuff.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv4.h>
+#include <linux/netfilter_ipv6.h>
+#include <linux/netfilter/nfnetlink.h>
+#include <linux/netfilter/nf_tables.h>
+#include <net/netfilter/nf_tables.h>
+#include <net/netfilter/nf_tables_ipv4.h>
+#include <net/netfilter/nf_tables_ipv6.h>
+#include <net/route.h>
+#include <net/ip.h>
+
+#ifdef CONFIG_NF_TABLES_IPV4
+static unsigned int nf_route_table_hook4(void *priv,
+ struct sk_buff *skb,
+ const struct nf_hook_state *state)
+{
+ const struct iphdr *iph;
+ struct nft_pktinfo pkt;
+ __be32 saddr, daddr;
+ unsigned int ret;
+ u32 mark;
+ int err;
+ u8 tos;
+
+ nft_set_pktinfo(&pkt, skb, state);
+ nft_set_pktinfo_ipv4(&pkt, skb);
+
+ mark = skb->mark;
+ iph = ip_hdr(skb);
+ saddr = iph->saddr;
+ daddr = iph->daddr;
+ tos = iph->tos;
+
+ ret = nft_do_chain(&pkt, priv);
+ if (ret == NF_ACCEPT) {
+ iph = ip_hdr(skb);
+
+ if (iph->saddr != saddr ||
+ iph->daddr != daddr ||
+ skb->mark != mark ||
+ iph->tos != tos) {
+ err = ip_route_me_harder(state->net, skb, RTN_UNSPEC);
+ if (err < 0)
+ ret = NF_DROP_ERR(err);
+ }
+ }
+ return ret;
+}
+
+static const struct nft_chain_type nft_chain_route_ipv4 = {
+ .name = "route",
+ .type = NFT_CHAIN_T_ROUTE,
+ .family = NFPROTO_IPV4,
+ .hook_mask = (1 << NF_INET_LOCAL_OUT),
+ .hooks = {
+ [NF_INET_LOCAL_OUT] = nf_route_table_hook4,
+ },
+};
+#endif
+
+#ifdef CONFIG_NF_TABLES_IPV6
+static unsigned int nf_route_table_hook6(void *priv,
+ struct sk_buff *skb,
+ const struct nf_hook_state *state)
+{
+ struct in6_addr saddr, daddr;
+ struct nft_pktinfo pkt;
+ u32 mark, flowlabel;
+ unsigned int ret;
+ u8 hop_limit;
+ int err;
+
+ nft_set_pktinfo(&pkt, skb, state);
+ nft_set_pktinfo_ipv6(&pkt, skb);
+
+ /* save source/dest address, mark, hoplimit, flowlabel, priority */
+ memcpy(&saddr, &ipv6_hdr(skb)->saddr, sizeof(saddr));
+ memcpy(&daddr, &ipv6_hdr(skb)->daddr, sizeof(daddr));
+ mark = skb->mark;
+ hop_limit = ipv6_hdr(skb)->hop_limit;
+
+ /* flowlabel and prio (includes version, which shouldn't change either)*/
+ flowlabel = *((u32 *)ipv6_hdr(skb));
+
+ ret = nft_do_chain(&pkt, priv);
+ if (ret == NF_ACCEPT &&
+ (memcmp(&ipv6_hdr(skb)->saddr, &saddr, sizeof(saddr)) ||
+ memcmp(&ipv6_hdr(skb)->daddr, &daddr, sizeof(daddr)) ||
+ skb->mark != mark ||
+ ipv6_hdr(skb)->hop_limit != hop_limit ||
+ flowlabel != *((u32 *)ipv6_hdr(skb)))) {
+ err = nf_ip6_route_me_harder(state->net, skb);
+ if (err < 0)
+ ret = NF_DROP_ERR(err);
+ }
+
+ return ret;
+}
+
+static const struct nft_chain_type nft_chain_route_ipv6 = {
+ .name = "route",
+ .type = NFT_CHAIN_T_ROUTE,
+ .family = NFPROTO_IPV6,
+ .hook_mask = (1 << NF_INET_LOCAL_OUT),
+ .hooks = {
+ [NF_INET_LOCAL_OUT] = nf_route_table_hook6,
+ },
+};
+#endif
+
+#ifdef CONFIG_NF_TABLES_INET
+static unsigned int nf_route_table_inet(void *priv,
+ struct sk_buff *skb,
+ const struct nf_hook_state *state)
+{
+ struct nft_pktinfo pkt;
+
+ switch (state->pf) {
+ case NFPROTO_IPV4:
+ return nf_route_table_hook4(priv, skb, state);
+ case NFPROTO_IPV6:
+ return nf_route_table_hook6(priv, skb, state);
+ default:
+ nft_set_pktinfo(&pkt, skb, state);
+ break;
+ }
+
+ return nft_do_chain(&pkt, priv);
+}
+
+static const struct nft_chain_type nft_chain_route_inet = {
+ .name = "route",
+ .type = NFT_CHAIN_T_ROUTE,
+ .family = NFPROTO_INET,
+ .hook_mask = (1 << NF_INET_LOCAL_OUT),
+ .hooks = {
+ [NF_INET_LOCAL_OUT] = nf_route_table_inet,
+ },
+};
+#endif
+
+void __init nft_chain_route_init(void)
+{
+#ifdef CONFIG_NF_TABLES_IPV6
+ nft_register_chain_type(&nft_chain_route_ipv6);
+#endif
+#ifdef CONFIG_NF_TABLES_IPV4
+ nft_register_chain_type(&nft_chain_route_ipv4);
+#endif
+#ifdef CONFIG_NF_TABLES_INET
+ nft_register_chain_type(&nft_chain_route_inet);
+#endif
+}
+
+void __exit nft_chain_route_fini(void)
+{
+#ifdef CONFIG_NF_TABLES_IPV6
+ nft_unregister_chain_type(&nft_chain_route_ipv6);
+#endif
+#ifdef CONFIG_NF_TABLES_IPV4
+ nft_unregister_chain_type(&nft_chain_route_ipv4);
+#endif
+#ifdef CONFIG_NF_TABLES_INET
+ nft_unregister_chain_type(&nft_chain_route_inet);
+#endif
+}
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