[NETFILTER]: nf_nat: don't add NAT extension for confirmed conntracks

[safe/jmp/linux-2.6] / net / ipv4 / netfilter / nf_nat_rule.c

diff --git a/net/ipv4/netfilter/nf_nat_rule.c b/net/ipv4/netfilter/nf_nat_rule.c
index 5191822..e8b4d0d 100644 (file)
--- a/net/ipv4/netfilter/nf_nat_rule.c
+++ b/net/ipv4/netfilter/nf_nat_rule.c
@@ -58,13 +58,14 @@ static struct
        .term = IPT_ERROR_INIT,                 /* ERROR */
 };
 
-static struct xt_table nat_table = {
+static struct xt_table __nat_table = {
        .name           = "nat",
        .valid_hooks    = NAT_VALID_HOOKS,
-       .lock           = RW_LOCK_UNLOCKED,
+       .lock           = __RW_LOCK_UNLOCKED(__nat_table.lock),
        .me             = THIS_MODULE,
        .af             = AF_INET,
 };
+static struct xt_table *nat_table;
 
 /* Source NAT */
 static unsigned int ipt_snat_target(struct sk_buff *skb,
@@ -142,7 +143,7 @@ static bool ipt_snat_checkentry(const char *tablename,
                                void *targinfo,
                                unsigned int hook_mask)
 {
-       struct nf_nat_multi_range_compat *mr = targinfo;
+       const struct nf_nat_multi_range_compat *mr = targinfo;
 
        /* Must be a valid range */
        if (mr->rangesize != 1) {
@@ -158,7 +159,7 @@ static bool ipt_dnat_checkentry(const char *tablename,
                                void *targinfo,
                                unsigned int hook_mask)
 {
-       struct nf_nat_multi_range_compat *mr = targinfo;
+       const struct nf_nat_multi_range_compat *mr = targinfo;
 
        /* Must be a valid range */
        if (mr->rangesize != 1) {
@@ -187,25 +188,6 @@ alloc_null_binding(struct nf_conn *ct, unsigned int hooknum)
        return nf_nat_setup_info(ct, &range, HOOK2MANIP(hooknum));
 }
 
-unsigned int
-alloc_null_binding_confirmed(struct nf_conn *ct, unsigned int hooknum)
-{
-       __be32 ip
-               = (HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC
-                  ? ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip
-                  : ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip);
-       __be16 all
-               = (HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC
-                  ? ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u.all
-                  : ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u.all);
-       struct nf_nat_range range
-               = { IP_NAT_RANGE_MAP_IPS, ip, ip, { all }, { all } };
-
-       pr_debug("Allocating NULL binding for confirmed %p (%u.%u.%u.%u)\n",
-                ct, NIPQUAD(ip));
-       return nf_nat_setup_info(ct, &range, HOOK2MANIP(hooknum));
-}
-
 int nf_nat_rule_find(struct sk_buff *skb,
                     unsigned int hooknum,
                     const struct net_device *in,
@@ -214,7 +196,7 @@ int nf_nat_rule_find(struct sk_buff *skb,
 {
        int ret;
 
-       ret = ipt_do_table(skb, hooknum, in, out, &nat_table);
+       ret = ipt_do_table(skb, hooknum, in, out, nat_table);
 
        if (ret == NF_ACCEPT) {
                if (!nf_nat_initialized(ct, HOOK2MANIP(hooknum)))
@@ -248,9 +230,10 @@ int __init nf_nat_rule_init(void)
 {
        int ret;
 
-       ret = ipt_register_table(&nat_table, &nat_initial_table.repl);
-       if (ret != 0)
-               return ret;
+       nat_table = ipt_register_table(&init_net, &__nat_table,
+                                      &nat_initial_table.repl);
+       if (IS_ERR(nat_table))
+               return PTR_ERR(nat_table);
        ret = xt_register_target(&ipt_snat_reg);
        if (ret != 0)
                goto unregister_table;
@@ -264,7 +247,7 @@ int __init nf_nat_rule_init(void)
  unregister_snat:
        xt_unregister_target(&ipt_snat_reg);
  unregister_table:
-       ipt_unregister_table(&nat_table);
+       ipt_unregister_table(nat_table);
 
        return ret;
 }
@@ -273,5 +256,5 @@ void nf_nat_rule_cleanup(void)
 {
        xt_unregister_target(&ipt_dnat_reg);
        xt_unregister_target(&ipt_snat_reg);
-       ipt_unregister_table(&nat_table);
+       ipt_unregister_table(nat_table);
 }