#ifdef CONFIG_XFRM
static void nat_decode_session(struct sk_buff *skb, struct flowi *fl)
{
- struct nf_conn *ct;
- struct nf_conntrack_tuple *t;
+ const struct nf_conn *ct;
+ const struct nf_conntrack_tuple *t;
enum ip_conntrack_info ctinfo;
enum ip_conntrack_dir dir;
unsigned long statusbit;
if (ct->status & statusbit) {
fl->fl4_dst = t->dst.u3.ip;
if (t->dst.protonum == IPPROTO_TCP ||
- t->dst.protonum == IPPROTO_UDP)
+ t->dst.protonum == IPPROTO_UDP ||
+ t->dst.protonum == IPPROTO_UDPLITE ||
+ t->dst.protonum == IPPROTO_DCCP ||
+ t->dst.protonum == IPPROTO_SCTP)
fl->fl_ip_dport = t->dst.u.tcp.port;
}
if (ct->status & statusbit) {
fl->fl4_src = t->src.u3.ip;
if (t->dst.protonum == IPPROTO_TCP ||
- t->dst.protonum == IPPROTO_UDP)
+ t->dst.protonum == IPPROTO_UDP ||
+ t->dst.protonum == IPPROTO_UDPLITE ||
+ t->dst.protonum == IPPROTO_DCCP ||
+ t->dst.protonum == IPPROTO_SCTP)
fl->fl_ip_sport = t->src.u.tcp.port;
}
}
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) {
- /* 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 (ip_hdr(skb)->protocol == IPPROTO_ICMP) {
- struct icmphdr _hdr, *hp;
-
- hp = skb_header_pointer(skb, ip_hdrlen(skb),
- sizeof(_hdr), &_hdr);
- if (hp != NULL &&
- hp->type == ICMP_REDIRECT)
- return NF_DROP;
- }
+ if (!ct)
return NF_ACCEPT;
- }
/* Don't try to NAT if this packet is not conntracked */
if (ct == &nf_conntrack_untracked)
nat = nfct_nat(ct);
if (!nat) {
+ /* NAT module was loaded late. */
+ if (nf_ct_is_confirmed(ct))
+ return NF_ACCEPT;
nat = nf_ct_ext_add(ct, NF_CT_EXT_NAT, GFP_ATOMIC);
if (nat == NULL) {
pr_debug("failed to add NAT extension\n");
if (!nf_nat_initialized(ct, maniptype)) {
unsigned int ret;
- if (unlikely(nf_ct_is_confirmed(ct)))
- /* NAT module was loaded late */
- ret = alloc_null_binding_confirmed(ct, hooknum);
- else if (hooknum == NF_IP_LOCAL_IN)
+ if (hooknum == NF_INET_LOCAL_IN)
/* LOCAL_IN hook doesn't have a chain! */
ret = alloc_null_binding(ct, hooknum);
else
ret = nf_nat_fn(hooknum, skb, in, out, okfn);
if (ret != NF_DROP && ret != NF_STOLEN &&
- daddr != ip_hdr(skb)->daddr) {
- dst_release(skb->dst);
- skb->dst = NULL;
- }
+ daddr != ip_hdr(skb)->daddr)
+ skb_dst_drop(skb);
+
return ret;
}
int (*okfn)(struct sk_buff *))
{
#ifdef CONFIG_XFRM
- struct nf_conn *ct;
+ const struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
#endif
unsigned int ret;
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
- struct nf_conn *ct;
+ const struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
unsigned int ret;
return ret;
}
-static unsigned int
-nf_nat_adjust(unsigned int hooknum,
- struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *))
-{
- struct nf_conn *ct;
- enum ip_conntrack_info ctinfo;
-
- ct = nf_ct_get(skb, &ctinfo);
- if (ct && test_bit(IPS_SEQ_ADJUST_BIT, &ct->status)) {
- pr_debug("nf_nat_standalone: adjusting sequence number\n");
- if (!nf_nat_seq_adjust(skb, ct, ctinfo))
- return NF_DROP;
- }
- return NF_ACCEPT;
-}
-
/* We must be after connection tracking and before packet filtering. */
-static struct nf_hook_ops nf_nat_ops[] = {
+static struct nf_hook_ops nf_nat_ops[] __read_mostly = {
/* Before packet filtering, change destination */
{
.hook = nf_nat_in,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_PRE_ROUTING,
+ .hooknum = NF_INET_PRE_ROUTING,
.priority = NF_IP_PRI_NAT_DST,
},
/* After packet filtering, change source */
.hook = nf_nat_out,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_POST_ROUTING,
+ .hooknum = NF_INET_POST_ROUTING,
.priority = NF_IP_PRI_NAT_SRC,
},
- /* After conntrack, adjust sequence number */
- {
- .hook = nf_nat_adjust,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_IP_POST_ROUTING,
- .priority = NF_IP_PRI_NAT_SEQ_ADJUST,
- },
/* Before packet filtering, change destination */
{
.hook = nf_nat_local_fn,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_LOCAL_OUT,
+ .hooknum = NF_INET_LOCAL_OUT,
.priority = NF_IP_PRI_NAT_DST,
},
/* After packet filtering, change source */
.hook = nf_nat_fn,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_LOCAL_IN,
+ .hooknum = NF_INET_LOCAL_IN,
.priority = NF_IP_PRI_NAT_SRC,
},
- /* After conntrack, adjust sequence number */
- {
- .hook = nf_nat_adjust,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_IP_LOCAL_IN,
- .priority = NF_IP_PRI_NAT_SEQ_ADJUST,
- },
};
static int __init nf_nat_standalone_init(void)
#ifdef CONFIG_XFRM
BUG_ON(ip_nat_decode_session != NULL);
- ip_nat_decode_session = nat_decode_session;
+ rcu_assign_pointer(ip_nat_decode_session, nat_decode_session);
#endif
ret = nf_nat_rule_init();
if (ret < 0) {
nf_nat_rule_cleanup();
cleanup_decode_session:
#ifdef CONFIG_XFRM
- ip_nat_decode_session = NULL;
+ rcu_assign_pointer(ip_nat_decode_session, NULL);
synchronize_net();
#endif
return ret;
nf_unregister_hooks(nf_nat_ops, ARRAY_SIZE(nf_nat_ops));
nf_nat_rule_cleanup();
#ifdef CONFIG_XFRM
- ip_nat_decode_session = NULL;
+ rcu_assign_pointer(ip_nat_decode_session, NULL);
synchronize_net();
#endif
/* Conntrack caches are unregistered in nf_conntrack_cleanup */
git.openpandora.org / pandora-kernel.git / blobdiff