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https://github.com/FEX-Emu/linux.git
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netfilter: nat: move specific NAT IPv4 to core
Move the specific NAT IPv4 core functions that are called from the hooks from iptable_nat.c to nf_nat_l3proto_ipv4.c. This prepares the ground to allow iptables and nft to use the same NAT engine code that comes in a follow up patch. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso
parent
f111f780ae
commit
30766f4c2d
@ -42,6 +42,44 @@ const struct nf_nat_l3proto *__nf_nat_l3proto_find(u8 l3proto);
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int nf_nat_icmp_reply_translation(struct sk_buff *skb, struct nf_conn *ct,
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int nf_nat_icmp_reply_translation(struct sk_buff *skb, struct nf_conn *ct,
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enum ip_conntrack_info ctinfo,
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enum ip_conntrack_info ctinfo,
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unsigned int hooknum);
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unsigned int hooknum);
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unsigned int nf_nat_ipv4_in(const struct nf_hook_ops *ops, struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *out,
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unsigned int (*do_chain)(const struct nf_hook_ops *ops,
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struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *out,
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struct nf_conn *ct));
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unsigned int nf_nat_ipv4_out(const struct nf_hook_ops *ops, struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *out,
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unsigned int (*do_chain)(const struct nf_hook_ops *ops,
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struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *out,
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struct nf_conn *ct));
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unsigned int nf_nat_ipv4_local_fn(const struct nf_hook_ops *ops,
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struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *out,
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unsigned int (*do_chain)(const struct nf_hook_ops *ops,
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struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *out,
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struct nf_conn *ct));
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unsigned int nf_nat_ipv4_fn(const struct nf_hook_ops *ops, struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *out,
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unsigned int (*do_chain)(const struct nf_hook_ops *ops,
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struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *out,
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struct nf_conn *ct));
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int nf_nat_icmpv6_reply_translation(struct sk_buff *skb, struct nf_conn *ct,
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int nf_nat_icmpv6_reply_translation(struct sk_buff *skb, struct nf_conn *ct,
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enum ip_conntrack_info ctinfo,
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enum ip_conntrack_info ctinfo,
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unsigned int hooknum, unsigned int hdrlen);
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unsigned int hooknum, unsigned int hdrlen);
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@ -28,222 +28,57 @@ static const struct xt_table nf_nat_ipv4_table = {
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.af = NFPROTO_IPV4,
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.af = NFPROTO_IPV4,
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};
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};
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static unsigned int alloc_null_binding(struct nf_conn *ct, unsigned int hooknum)
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static unsigned int iptable_nat_do_chain(const struct nf_hook_ops *ops,
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{
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struct sk_buff *skb,
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/* Force range to this IP; let proto decide mapping for
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const struct net_device *in,
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* per-proto parts (hence not IP_NAT_RANGE_PROTO_SPECIFIED).
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const struct net_device *out,
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*/
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struct nf_conn *ct)
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struct nf_nat_range range;
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range.flags = 0;
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pr_debug("Allocating NULL binding for %p (%pI4)\n", ct,
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HOOK2MANIP(hooknum) == NF_NAT_MANIP_SRC ?
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&ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip :
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&ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip);
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return nf_nat_setup_info(ct, &range, HOOK2MANIP(hooknum));
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}
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static unsigned int nf_nat_rule_find(struct sk_buff *skb, unsigned int hooknum,
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const struct net_device *in,
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const struct net_device *out,
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struct nf_conn *ct)
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{
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{
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struct net *net = nf_ct_net(ct);
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struct net *net = nf_ct_net(ct);
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unsigned int ret;
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ret = ipt_do_table(skb, hooknum, in, out, net->ipv4.nat_table);
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return ipt_do_table(skb, ops->hooknum, in, out, net->ipv4.nat_table);
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if (ret == NF_ACCEPT) {
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if (!nf_nat_initialized(ct, HOOK2MANIP(hooknum)))
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ret = alloc_null_binding(ct, hooknum);
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}
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return ret;
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}
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}
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static unsigned int
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static unsigned int iptable_nat_ipv4_fn(const struct nf_hook_ops *ops,
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nf_nat_ipv4_fn(const struct nf_hook_ops *ops,
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struct sk_buff *skb,
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struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *in,
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const struct net_device *out,
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const struct net_device *out,
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int (*okfn)(struct sk_buff *))
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int (*okfn)(struct sk_buff *))
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{
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{
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struct nf_conn *ct;
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return nf_nat_ipv4_fn(ops, skb, in, out, iptable_nat_do_chain);
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enum ip_conntrack_info ctinfo;
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struct nf_conn_nat *nat;
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/* maniptype == SRC for postrouting. */
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enum nf_nat_manip_type maniptype = HOOK2MANIP(ops->hooknum);
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/* We never see fragments: conntrack defrags on pre-routing
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* and local-out, and nf_nat_out protects post-routing.
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*/
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NF_CT_ASSERT(!ip_is_fragment(ip_hdr(skb)));
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ct = nf_ct_get(skb, &ctinfo);
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/* Can't track? It's not due to stress, or conntrack would
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* have dropped it. Hence it's the user's responsibilty to
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* packet filter it out, or implement conntrack/NAT for that
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* protocol. 8) --RR
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*/
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if (!ct)
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return NF_ACCEPT;
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/* Don't try to NAT if this packet is not conntracked */
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if (nf_ct_is_untracked(ct))
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return NF_ACCEPT;
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nat = nf_ct_nat_ext_add(ct);
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if (nat == NULL)
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return NF_ACCEPT;
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switch (ctinfo) {
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case IP_CT_RELATED:
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case IP_CT_RELATED_REPLY:
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if (ip_hdr(skb)->protocol == IPPROTO_ICMP) {
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if (!nf_nat_icmp_reply_translation(skb, ct, ctinfo,
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ops->hooknum))
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return NF_DROP;
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else
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return NF_ACCEPT;
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}
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/* Fall thru... (Only ICMPs can be IP_CT_IS_REPLY) */
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case IP_CT_NEW:
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/* Seen it before? This can happen for loopback, retrans,
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* or local packets.
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*/
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if (!nf_nat_initialized(ct, maniptype)) {
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unsigned int ret;
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ret = nf_nat_rule_find(skb, ops->hooknum, in, out, ct);
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if (ret != NF_ACCEPT)
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return ret;
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} else {
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pr_debug("Already setup manip %s for ct %p\n",
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maniptype == NF_NAT_MANIP_SRC ? "SRC" : "DST",
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ct);
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if (nf_nat_oif_changed(ops->hooknum, ctinfo, nat, out))
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goto oif_changed;
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}
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break;
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default:
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/* ESTABLISHED */
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NF_CT_ASSERT(ctinfo == IP_CT_ESTABLISHED ||
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ctinfo == IP_CT_ESTABLISHED_REPLY);
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if (nf_nat_oif_changed(ops->hooknum, ctinfo, nat, out))
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goto oif_changed;
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}
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return nf_nat_packet(ct, ctinfo, ops->hooknum, skb);
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oif_changed:
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nf_ct_kill_acct(ct, ctinfo, skb);
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return NF_DROP;
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}
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}
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static unsigned int
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static unsigned int iptable_nat_ipv4_in(const struct nf_hook_ops *ops,
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nf_nat_ipv4_in(const struct nf_hook_ops *ops,
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struct sk_buff *skb,
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struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *in,
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const struct net_device *out,
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const struct net_device *out,
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int (*okfn)(struct sk_buff *))
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int (*okfn)(struct sk_buff *))
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{
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{
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unsigned int ret;
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return nf_nat_ipv4_in(ops, skb, in, out, iptable_nat_do_chain);
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__be32 daddr = ip_hdr(skb)->daddr;
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ret = nf_nat_ipv4_fn(ops, skb, in, out, okfn);
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if (ret != NF_DROP && ret != NF_STOLEN &&
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daddr != ip_hdr(skb)->daddr)
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skb_dst_drop(skb);
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return ret;
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}
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}
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static unsigned int
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static unsigned int iptable_nat_ipv4_out(const struct nf_hook_ops *ops,
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nf_nat_ipv4_out(const struct nf_hook_ops *ops,
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struct sk_buff *skb,
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struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *in,
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const struct net_device *out,
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const struct net_device *out,
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int (*okfn)(struct sk_buff *))
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int (*okfn)(struct sk_buff *))
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{
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{
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#ifdef CONFIG_XFRM
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return nf_nat_ipv4_out(ops, skb, in, out, iptable_nat_do_chain);
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const struct nf_conn *ct;
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enum ip_conntrack_info ctinfo;
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int err;
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#endif
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unsigned int ret;
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/* root is playing with raw sockets. */
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if (skb->len < sizeof(struct iphdr) ||
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ip_hdrlen(skb) < sizeof(struct iphdr))
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return NF_ACCEPT;
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ret = nf_nat_ipv4_fn(ops, skb, in, out, okfn);
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#ifdef CONFIG_XFRM
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if (ret != NF_DROP && ret != NF_STOLEN &&
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!(IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) &&
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(ct = nf_ct_get(skb, &ctinfo)) != NULL) {
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enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
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if ((ct->tuplehash[dir].tuple.src.u3.ip !=
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ct->tuplehash[!dir].tuple.dst.u3.ip) ||
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(ct->tuplehash[dir].tuple.dst.protonum != IPPROTO_ICMP &&
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ct->tuplehash[dir].tuple.src.u.all !=
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ct->tuplehash[!dir].tuple.dst.u.all)) {
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err = nf_xfrm_me_harder(skb, AF_INET);
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if (err < 0)
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ret = NF_DROP_ERR(err);
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}
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}
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#endif
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return ret;
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}
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}
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static unsigned int
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static unsigned int iptable_nat_ipv4_local_fn(const struct nf_hook_ops *ops,
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nf_nat_ipv4_local_fn(const struct nf_hook_ops *ops,
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struct sk_buff *skb,
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struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *in,
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const struct net_device *out,
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const struct net_device *out,
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int (*okfn)(struct sk_buff *))
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int (*okfn)(struct sk_buff *))
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{
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{
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const struct nf_conn *ct;
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return nf_nat_ipv4_local_fn(ops, skb, in, out, iptable_nat_do_chain);
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enum ip_conntrack_info ctinfo;
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unsigned int ret;
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int err;
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/* root is playing with raw sockets. */
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if (skb->len < sizeof(struct iphdr) ||
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ip_hdrlen(skb) < sizeof(struct iphdr))
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return NF_ACCEPT;
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ret = nf_nat_ipv4_fn(ops, skb, in, out, okfn);
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if (ret != NF_DROP && ret != NF_STOLEN &&
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(ct = nf_ct_get(skb, &ctinfo)) != NULL) {
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enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
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if (ct->tuplehash[dir].tuple.dst.u3.ip !=
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ct->tuplehash[!dir].tuple.src.u3.ip) {
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err = ip_route_me_harder(skb, RTN_UNSPEC);
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if (err < 0)
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ret = NF_DROP_ERR(err);
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}
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#ifdef CONFIG_XFRM
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else if (!(IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) &&
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ct->tuplehash[dir].tuple.dst.protonum != IPPROTO_ICMP &&
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ct->tuplehash[dir].tuple.dst.u.all !=
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ct->tuplehash[!dir].tuple.src.u.all) {
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err = nf_xfrm_me_harder(skb, AF_INET);
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if (err < 0)
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ret = NF_DROP_ERR(err);
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}
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#endif
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}
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return ret;
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}
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}
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static struct nf_hook_ops nf_nat_ipv4_ops[] __read_mostly = {
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static struct nf_hook_ops nf_nat_ipv4_ops[] __read_mostly = {
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/* Before packet filtering, change destination */
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/* Before packet filtering, change destination */
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{
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{
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.hook = nf_nat_ipv4_in,
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.hook = iptable_nat_ipv4_in,
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.owner = THIS_MODULE,
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.owner = THIS_MODULE,
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.pf = NFPROTO_IPV4,
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.pf = NFPROTO_IPV4,
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.hooknum = NF_INET_PRE_ROUTING,
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.hooknum = NF_INET_PRE_ROUTING,
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@ -251,7 +86,7 @@ static struct nf_hook_ops nf_nat_ipv4_ops[] __read_mostly = {
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},
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},
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/* After packet filtering, change source */
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/* After packet filtering, change source */
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{
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{
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.hook = nf_nat_ipv4_out,
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.hook = iptable_nat_ipv4_out,
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.owner = THIS_MODULE,
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.owner = THIS_MODULE,
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.pf = NFPROTO_IPV4,
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.pf = NFPROTO_IPV4,
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.hooknum = NF_INET_POST_ROUTING,
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.hooknum = NF_INET_POST_ROUTING,
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@ -259,7 +94,7 @@ static struct nf_hook_ops nf_nat_ipv4_ops[] __read_mostly = {
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},
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},
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/* Before packet filtering, change destination */
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/* Before packet filtering, change destination */
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{
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{
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.hook = nf_nat_ipv4_local_fn,
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.hook = iptable_nat_ipv4_local_fn,
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.owner = THIS_MODULE,
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.owner = THIS_MODULE,
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.pf = NFPROTO_IPV4,
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.pf = NFPROTO_IPV4,
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.hooknum = NF_INET_LOCAL_OUT,
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.hooknum = NF_INET_LOCAL_OUT,
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@ -267,7 +102,7 @@ static struct nf_hook_ops nf_nat_ipv4_ops[] __read_mostly = {
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},
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},
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/* After packet filtering, change source */
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/* After packet filtering, change source */
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{
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{
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.hook = nf_nat_ipv4_fn,
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.hook = iptable_nat_ipv4_fn,
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.owner = THIS_MODULE,
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.owner = THIS_MODULE,
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.pf = NFPROTO_IPV4,
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.pf = NFPROTO_IPV4,
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.hooknum = NF_INET_LOCAL_IN,
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.hooknum = NF_INET_LOCAL_IN,
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@ -254,6 +254,205 @@ int nf_nat_icmp_reply_translation(struct sk_buff *skb,
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}
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}
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EXPORT_SYMBOL_GPL(nf_nat_icmp_reply_translation);
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EXPORT_SYMBOL_GPL(nf_nat_icmp_reply_translation);
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unsigned int
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nf_nat_ipv4_fn(const struct nf_hook_ops *ops, struct sk_buff *skb,
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const struct net_device *in, const struct net_device *out,
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unsigned int (*do_chain)(const struct nf_hook_ops *ops,
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struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *out,
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struct nf_conn *ct))
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{
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struct nf_conn *ct;
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enum ip_conntrack_info ctinfo;
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struct nf_conn_nat *nat;
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|
/* maniptype == SRC for postrouting. */
|
||||||
|
enum nf_nat_manip_type maniptype = HOOK2MANIP(ops->hooknum);
|
||||||
|
|
||||||
|
/* We never see fragments: conntrack defrags on pre-routing
|
||||||
|
* and local-out, and nf_nat_out protects post-routing.
|
||||||
|
*/
|
||||||
|
NF_CT_ASSERT(!ip_is_fragment(ip_hdr(skb)));
|
||||||
|
|
||||||
|
ct = nf_ct_get(skb, &ctinfo);
|
||||||
|
/* Can't track? It's not due to stress, or conntrack would
|
||||||
|
* have dropped it. Hence it's the user's responsibilty to
|
||||||
|
* packet filter it out, or implement conntrack/NAT for that
|
||||||
|
* protocol. 8) --RR
|
||||||
|
*/
|
||||||
|
if (!ct)
|
||||||
|
return NF_ACCEPT;
|
||||||
|
|
||||||
|
/* Don't try to NAT if this packet is not conntracked */
|
||||||
|
if (nf_ct_is_untracked(ct))
|
||||||
|
return NF_ACCEPT;
|
||||||
|
|
||||||
|
nat = nf_ct_nat_ext_add(ct);
|
||||||
|
if (nat == NULL)
|
||||||
|
return NF_ACCEPT;
|
||||||
|
|
||||||
|
switch (ctinfo) {
|
||||||
|
case IP_CT_RELATED:
|
||||||
|
case IP_CT_RELATED_REPLY:
|
||||||
|
if (ip_hdr(skb)->protocol == IPPROTO_ICMP) {
|
||||||
|
if (!nf_nat_icmp_reply_translation(skb, ct, ctinfo,
|
||||||
|
ops->hooknum))
|
||||||
|
return NF_DROP;
|
||||||
|
else
|
||||||
|
return NF_ACCEPT;
|
||||||
|
}
|
||||||
|
/* Fall thru... (Only ICMPs can be IP_CT_IS_REPLY) */
|
||||||
|
case IP_CT_NEW:
|
||||||
|
/* Seen it before? This can happen for loopback, retrans,
|
||||||
|
* or local packets.
|
||||||
|
*/
|
||||||
|
if (!nf_nat_initialized(ct, maniptype)) {
|
||||||
|
unsigned int ret;
|
||||||
|
|
||||||
|
ret = do_chain(ops, skb, in, out, ct);
|
||||||
|
if (ret != NF_ACCEPT)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
if (nf_nat_initialized(ct, HOOK2MANIP(ops->hooknum)))
|
||||||
|
break;
|
||||||
|
|
||||||
|
ret = nf_nat_alloc_null_binding(ct, ops->hooknum);
|
||||||
|
if (ret != NF_ACCEPT)
|
||||||
|
return ret;
|
||||||
|
} else {
|
||||||
|
pr_debug("Already setup manip %s for ct %p\n",
|
||||||
|
maniptype == NF_NAT_MANIP_SRC ? "SRC" : "DST",
|
||||||
|
ct);
|
||||||
|
if (nf_nat_oif_changed(ops->hooknum, ctinfo, nat, out))
|
||||||
|
goto oif_changed;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
|
||||||
|
default:
|
||||||
|
/* ESTABLISHED */
|
||||||
|
NF_CT_ASSERT(ctinfo == IP_CT_ESTABLISHED ||
|
||||||
|
ctinfo == IP_CT_ESTABLISHED_REPLY);
|
||||||
|
if (nf_nat_oif_changed(ops->hooknum, ctinfo, nat, out))
|
||||||
|
goto oif_changed;
|
||||||
|
}
|
||||||
|
|
||||||
|
return nf_nat_packet(ct, ctinfo, ops->hooknum, skb);
|
||||||
|
|
||||||
|
oif_changed:
|
||||||
|
nf_ct_kill_acct(ct, ctinfo, skb);
|
||||||
|
return NF_DROP;
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL_GPL(nf_nat_ipv4_fn);
|
||||||
|
|
||||||
|
unsigned int
|
||||||
|
nf_nat_ipv4_in(const struct nf_hook_ops *ops, struct sk_buff *skb,
|
||||||
|
const struct net_device *in, const struct net_device *out,
|
||||||
|
unsigned int (*do_chain)(const struct nf_hook_ops *ops,
|
||||||
|
struct sk_buff *skb,
|
||||||
|
const struct net_device *in,
|
||||||
|
const struct net_device *out,
|
||||||
|
struct nf_conn *ct))
|
||||||
|
{
|
||||||
|
unsigned int ret;
|
||||||
|
__be32 daddr = ip_hdr(skb)->daddr;
|
||||||
|
|
||||||
|
ret = nf_nat_ipv4_fn(ops, skb, in, out, do_chain);
|
||||||
|
if (ret != NF_DROP && ret != NF_STOLEN &&
|
||||||
|
daddr != ip_hdr(skb)->daddr)
|
||||||
|
skb_dst_drop(skb);
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL_GPL(nf_nat_ipv4_in);
|
||||||
|
|
||||||
|
unsigned int
|
||||||
|
nf_nat_ipv4_out(const struct nf_hook_ops *ops, struct sk_buff *skb,
|
||||||
|
const struct net_device *in, const struct net_device *out,
|
||||||
|
unsigned int (*do_chain)(const struct nf_hook_ops *ops,
|
||||||
|
struct sk_buff *skb,
|
||||||
|
const struct net_device *in,
|
||||||
|
const struct net_device *out,
|
||||||
|
struct nf_conn *ct))
|
||||||
|
{
|
||||||
|
#ifdef CONFIG_XFRM
|
||||||
|
const struct nf_conn *ct;
|
||||||
|
enum ip_conntrack_info ctinfo;
|
||||||
|
int err;
|
||||||
|
#endif
|
||||||
|
unsigned int ret;
|
||||||
|
|
||||||
|
/* root is playing with raw sockets. */
|
||||||
|
if (skb->len < sizeof(struct iphdr) ||
|
||||||
|
ip_hdrlen(skb) < sizeof(struct iphdr))
|
||||||
|
return NF_ACCEPT;
|
||||||
|
|
||||||
|
ret = nf_nat_ipv4_fn(ops, skb, in, out, do_chain);
|
||||||
|
#ifdef CONFIG_XFRM
|
||||||
|
if (ret != NF_DROP && ret != NF_STOLEN &&
|
||||||
|
!(IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) &&
|
||||||
|
(ct = nf_ct_get(skb, &ctinfo)) != NULL) {
|
||||||
|
enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
|
||||||
|
|
||||||
|
if ((ct->tuplehash[dir].tuple.src.u3.ip !=
|
||||||
|
ct->tuplehash[!dir].tuple.dst.u3.ip) ||
|
||||||
|
(ct->tuplehash[dir].tuple.dst.protonum != IPPROTO_ICMP &&
|
||||||
|
ct->tuplehash[dir].tuple.src.u.all !=
|
||||||
|
ct->tuplehash[!dir].tuple.dst.u.all)) {
|
||||||
|
err = nf_xfrm_me_harder(skb, AF_INET);
|
||||||
|
if (err < 0)
|
||||||
|
ret = NF_DROP_ERR(err);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL_GPL(nf_nat_ipv4_out);
|
||||||
|
|
||||||
|
unsigned int
|
||||||
|
nf_nat_ipv4_local_fn(const struct nf_hook_ops *ops, struct sk_buff *skb,
|
||||||
|
const struct net_device *in, const struct net_device *out,
|
||||||
|
unsigned int (*do_chain)(const struct nf_hook_ops *ops,
|
||||||
|
struct sk_buff *skb,
|
||||||
|
const struct net_device *in,
|
||||||
|
const struct net_device *out,
|
||||||
|
struct nf_conn *ct))
|
||||||
|
{
|
||||||
|
const struct nf_conn *ct;
|
||||||
|
enum ip_conntrack_info ctinfo;
|
||||||
|
unsigned int ret;
|
||||||
|
int err;
|
||||||
|
|
||||||
|
/* root is playing with raw sockets. */
|
||||||
|
if (skb->len < sizeof(struct iphdr) ||
|
||||||
|
ip_hdrlen(skb) < sizeof(struct iphdr))
|
||||||
|
return NF_ACCEPT;
|
||||||
|
|
||||||
|
ret = nf_nat_ipv4_fn(ops, skb, in, out, do_chain);
|
||||||
|
if (ret != NF_DROP && ret != NF_STOLEN &&
|
||||||
|
(ct = nf_ct_get(skb, &ctinfo)) != NULL) {
|
||||||
|
enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
|
||||||
|
|
||||||
|
if (ct->tuplehash[dir].tuple.dst.u3.ip !=
|
||||||
|
ct->tuplehash[!dir].tuple.src.u3.ip) {
|
||||||
|
err = ip_route_me_harder(skb, RTN_UNSPEC);
|
||||||
|
if (err < 0)
|
||||||
|
ret = NF_DROP_ERR(err);
|
||||||
|
}
|
||||||
|
#ifdef CONFIG_XFRM
|
||||||
|
else if (!(IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) &&
|
||||||
|
ct->tuplehash[dir].tuple.dst.protonum != IPPROTO_ICMP &&
|
||||||
|
ct->tuplehash[dir].tuple.dst.u.all !=
|
||||||
|
ct->tuplehash[!dir].tuple.src.u.all) {
|
||||||
|
err = nf_xfrm_me_harder(skb, AF_INET);
|
||||||
|
if (err < 0)
|
||||||
|
ret = NF_DROP_ERR(err);
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL_GPL(nf_nat_ipv4_local_fn);
|
||||||
|
|
||||||
static int __init nf_nat_l3proto_ipv4_init(void)
|
static int __init nf_nat_l3proto_ipv4_init(void)
|
||||||
{
|
{
|
||||||
int err;
|
int err;
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user