#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h>
+#include <net/netfilter/nf_conntrack_extend.h>
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_rule.h>
#include <net/netfilter/nf_nat_protocol.h>
#include <net/netfilter/nf_nat_helper.h>
#include <linux/netfilter_ipv4/ip_tables.h>
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(format, args...)
-#endif
-
#ifdef CONFIG_XFRM
static void nat_decode_session(struct sk_buff *skb, struct flowi *fl)
{
struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
struct nf_conn_nat *nat;
- struct nf_nat_info *info;
/* maniptype == SRC for postrouting. */
enum nf_nat_manip_type maniptype = HOOK2MANIP(hooknum);
/* We never see fragments: conntrack defrags on pre-routing
and local-out, and nf_nat_out protects post-routing. */
- NF_CT_ASSERT(!((*pskb)->nh.iph->frag_off
- & htons(IP_MF|IP_OFFSET)));
+ NF_CT_ASSERT(!(ip_hdr(*pskb)->frag_off & htons(IP_MF | IP_OFFSET)));
ct = nf_ct_get(*pskb, &ctinfo);
/* Can't track? It's not due to stress, or conntrack would
/* Exception: ICMP redirect to new connection (not in
hash table yet). We must not let this through, in
case we're doing NAT to the same network. */
- if ((*pskb)->nh.iph->protocol == IPPROTO_ICMP) {
+ if (ip_hdr(*pskb)->protocol == IPPROTO_ICMP) {
struct icmphdr _hdr, *hp;
- hp = skb_header_pointer(*pskb,
- (*pskb)->nh.iph->ihl*4,
+ hp = skb_header_pointer(*pskb, ip_hdrlen(*pskb),
sizeof(_hdr), &_hdr);
if (hp != NULL &&
hp->type == ICMP_REDIRECT)
return NF_ACCEPT;
nat = nfct_nat(ct);
- if (!nat)
- return NF_ACCEPT;
+ if (!nat) {
+ nat = nf_ct_ext_add(ct, NF_CT_EXT_NAT, GFP_ATOMIC);
+ if (nat == NULL) {
+ pr_debug("failed to add NAT extension\n");
+ return NF_ACCEPT;
+ }
+ }
switch (ctinfo) {
case IP_CT_RELATED:
case IP_CT_RELATED+IP_CT_IS_REPLY:
- if ((*pskb)->nh.iph->protocol == IPPROTO_ICMP) {
+ if (ip_hdr(*pskb)->protocol == IPPROTO_ICMP) {
if (!nf_nat_icmp_reply_translation(ct, ctinfo,
hooknum, pskb))
return NF_DROP;
}
/* Fall thru... (Only ICMPs can be IP_CT_IS_REPLY) */
case IP_CT_NEW:
- info = &nat->info;
/* Seen it before? This can happen for loopback, retrans,
or local packets.. */
if (unlikely(nf_ct_is_confirmed(ct)))
/* NAT module was loaded late */
- ret = alloc_null_binding_confirmed(ct, info,
- hooknum);
+ ret = alloc_null_binding_confirmed(ct, hooknum);
else if (hooknum == NF_IP_LOCAL_IN)
/* LOCAL_IN hook doesn't have a chain! */
- ret = alloc_null_binding(ct, info, hooknum);
+ ret = alloc_null_binding(ct, hooknum);
else
ret = nf_nat_rule_find(pskb, hooknum, in, out,
- ct, info);
+ ct);
if (ret != NF_ACCEPT) {
return ret;
}
} else
- DEBUGP("Already setup manip %s for ct %p\n",
- maniptype == IP_NAT_MANIP_SRC ? "SRC" : "DST",
- ct);
+ pr_debug("Already setup manip %s for ct %p\n",
+ maniptype == IP_NAT_MANIP_SRC ? "SRC" : "DST",
+ ct);
break;
default:
/* ESTABLISHED */
NF_CT_ASSERT(ctinfo == IP_CT_ESTABLISHED ||
ctinfo == (IP_CT_ESTABLISHED+IP_CT_IS_REPLY));
- info = &nat->info;
}
- NF_CT_ASSERT(info);
return nf_nat_packet(ct, ctinfo, hooknum, pskb);
}
int (*okfn)(struct sk_buff *))
{
unsigned int ret;
- __be32 daddr = (*pskb)->nh.iph->daddr;
+ __be32 daddr = ip_hdr(*pskb)->daddr;
ret = nf_nat_fn(hooknum, pskb, in, out, okfn);
if (ret != NF_DROP && ret != NF_STOLEN &&
- daddr != (*pskb)->nh.iph->daddr) {
+ daddr != ip_hdr(*pskb)->daddr) {
dst_release((*pskb)->dst);
(*pskb)->dst = NULL;
}
/* root is playing with raw sockets. */
if ((*pskb)->len < sizeof(struct iphdr) ||
- (*pskb)->nh.iph->ihl * 4 < sizeof(struct iphdr))
+ ip_hdrlen(*pskb) < sizeof(struct iphdr))
return NF_ACCEPT;
ret = nf_nat_fn(hooknum, pskb, in, out, okfn);
/* root is playing with raw sockets. */
if ((*pskb)->len < sizeof(struct iphdr) ||
- (*pskb)->nh.iph->ihl * 4 < sizeof(struct iphdr))
+ ip_hdrlen(*pskb) < sizeof(struct iphdr))
return NF_ACCEPT;
ret = nf_nat_fn(hooknum, pskb, in, out, okfn);
ct = nf_ct_get(*pskb, &ctinfo);
if (ct && test_bit(IPS_SEQ_ADJUST_BIT, &ct->status)) {
- DEBUGP("nf_nat_standalone: adjusting sequence number\n");
+ pr_debug("nf_nat_standalone: adjusting sequence number\n");
if (!nf_nat_seq_adjust(pskb, ct, ctinfo))
return NF_DROP;
}
static int __init nf_nat_standalone_init(void)
{
- int size, ret = 0;
+ int ret = 0;
- need_conntrack();
+ need_ipv4_conntrack();
- size = ALIGN(sizeof(struct nf_conn), __alignof__(struct nf_conn_nat)) +
- sizeof(struct nf_conn_nat);
- ret = nf_conntrack_register_cache(NF_CT_F_NAT, "nf_nat:base", size);
- if (ret < 0) {
- printk(KERN_ERR "nf_nat_init: Unable to create slab cache\n");
- return ret;
- }
-
- size = ALIGN(size, __alignof__(struct nf_conn_help)) +
- sizeof(struct nf_conn_help);
- ret = nf_conntrack_register_cache(NF_CT_F_NAT|NF_CT_F_HELP,
- "nf_nat:help", size);
- if (ret < 0) {
- printk(KERN_ERR "nf_nat_init: Unable to create slab cache\n");
- goto cleanup_register_cache;
- }
#ifdef CONFIG_XFRM
BUG_ON(ip_nat_decode_session != NULL);
ip_nat_decode_session = nat_decode_session;
printk("nf_nat_init: can't register hooks.\n");
goto cleanup_rule_init;
}
- nf_nat_module_is_loaded = 1;
return ret;
cleanup_rule_init:
ip_nat_decode_session = NULL;
synchronize_net();
#endif
- nf_conntrack_unregister_cache(NF_CT_F_NAT|NF_CT_F_HELP);
- cleanup_register_cache:
- nf_conntrack_unregister_cache(NF_CT_F_NAT);
return ret;
}
{
nf_unregister_hooks(nf_nat_ops, ARRAY_SIZE(nf_nat_ops));
nf_nat_rule_cleanup();
- nf_nat_module_is_loaded = 0;
#ifdef CONFIG_XFRM
ip_nat_decode_session = NULL;
synchronize_net();
git.openpandora.org / pandora-kernel.git / blobdiff