#include <linux/kmod.h>
#include <linux/skbuff.h>
#include <linux/proc_fs.h>
+#include <linux/slab.h>
#include <net/checksum.h>
#include <net/route.h>
#include <linux/bitops.h>
#include <net/netfilter/nf_nat_core.h>
#include <net/netfilter/nf_nat_rule.h>
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(format, args...)
-#endif
+#define NAT_VALID_HOOKS ((1 << NF_INET_PRE_ROUTING) | \
+ (1 << NF_INET_POST_ROUTING) | \
+ (1 << NF_INET_LOCAL_OUT))
-#define NAT_VALID_HOOKS ((1<<NF_IP_PRE_ROUTING) | (1<<NF_IP_POST_ROUTING) | (1<<NF_IP_LOCAL_OUT))
-
-static struct
-{
- struct ipt_replace repl;
- struct ipt_standard entries[3];
- struct ipt_error term;
-} nat_initial_table __initdata = {
- .repl = {
- .name = "nat",
- .valid_hooks = NAT_VALID_HOOKS,
- .num_entries = 4,
- .size = sizeof(struct ipt_standard) * 3 + sizeof(struct ipt_error),
- .hook_entry = {
- [NF_IP_PRE_ROUTING] = 0,
- [NF_IP_POST_ROUTING] = sizeof(struct ipt_standard),
- [NF_IP_LOCAL_OUT] = sizeof(struct ipt_standard) * 2
- },
- .underflow = {
- [NF_IP_PRE_ROUTING] = 0,
- [NF_IP_POST_ROUTING] = sizeof(struct ipt_standard),
- [NF_IP_LOCAL_OUT] = sizeof(struct ipt_standard) * 2
- },
- },
- .entries = {
- IPT_STANDARD_INIT(NF_ACCEPT), /* PRE_ROUTING */
- IPT_STANDARD_INIT(NF_ACCEPT), /* POST_ROUTING */
- IPT_STANDARD_INIT(NF_ACCEPT), /* LOCAL_OUT */
- },
- .term = IPT_ERROR_INIT, /* ERROR */
-};
-
-static struct xt_table nat_table = {
+static const struct xt_table nat_table = {
.name = "nat",
.valid_hooks = NAT_VALID_HOOKS,
- .lock = RW_LOCK_UNLOCKED,
.me = THIS_MODULE,
- .af = AF_INET,
+ .af = NFPROTO_IPV4,
};
/* Source NAT */
-static unsigned int ipt_snat_target(struct sk_buff **pskb,
- const struct net_device *in,
- const struct net_device *out,
- unsigned int hooknum,
- const struct xt_target *target,
- const void *targinfo)
+static unsigned int
+ipt_snat_target(struct sk_buff *skb, const struct xt_target_param *par)
{
struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
- const struct nf_nat_multi_range_compat *mr = targinfo;
+ const struct nf_nat_multi_range_compat *mr = par->targinfo;
- NF_CT_ASSERT(hooknum == NF_IP_POST_ROUTING);
+ NF_CT_ASSERT(par->hooknum == NF_INET_POST_ROUTING);
- ct = nf_ct_get(*pskb, &ctinfo);
+ ct = nf_ct_get(skb, &ctinfo);
/* Connection must be valid and new. */
NF_CT_ASSERT(ct && (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED ||
ctinfo == IP_CT_RELATED + IP_CT_IS_REPLY));
- NF_CT_ASSERT(out);
+ NF_CT_ASSERT(par->out != NULL);
- return nf_nat_setup_info(ct, &mr->range[0], hooknum);
-}
-
-/* Before 2.6.11 we did implicit source NAT if required. Warn about change. */
-static void warn_if_extra_mangle(__be32 dstip, __be32 srcip)
-{
- static int warned = 0;
- struct flowi fl = { .nl_u = { .ip4_u = { .daddr = dstip } } };
- struct rtable *rt;
-
- if (ip_route_output_key(&rt, &fl) != 0)
- return;
-
- if (rt->rt_src != srcip && !warned) {
- printk("NAT: no longer support implicit source local NAT\n");
- printk("NAT: packet src %u.%u.%u.%u -> dst %u.%u.%u.%u\n",
- NIPQUAD(srcip), NIPQUAD(dstip));
- warned = 1;
- }
- ip_rt_put(rt);
+ return nf_nat_setup_info(ct, &mr->range[0], IP_NAT_MANIP_SRC);
}
-static unsigned int ipt_dnat_target(struct sk_buff **pskb,
- const struct net_device *in,
- const struct net_device *out,
- unsigned int hooknum,
- const struct xt_target *target,
- const void *targinfo)
+static unsigned int
+ipt_dnat_target(struct sk_buff *skb, const struct xt_target_param *par)
{
struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
- const struct nf_nat_multi_range_compat *mr = targinfo;
+ const struct nf_nat_multi_range_compat *mr = par->targinfo;
- NF_CT_ASSERT(hooknum == NF_IP_PRE_ROUTING ||
- hooknum == NF_IP_LOCAL_OUT);
+ NF_CT_ASSERT(par->hooknum == NF_INET_PRE_ROUTING ||
+ par->hooknum == NF_INET_LOCAL_OUT);
- ct = nf_ct_get(*pskb, &ctinfo);
+ ct = nf_ct_get(skb, &ctinfo);
/* Connection must be valid and new. */
NF_CT_ASSERT(ct && (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED));
- if (hooknum == NF_IP_LOCAL_OUT &&
- mr->range[0].flags & IP_NAT_RANGE_MAP_IPS)
- warn_if_extra_mangle(ip_hdr(*pskb)->daddr,
- mr->range[0].min_ip);
-
- return nf_nat_setup_info(ct, &mr->range[0], hooknum);
+ return nf_nat_setup_info(ct, &mr->range[0], IP_NAT_MANIP_DST);
}
-static bool ipt_snat_checkentry(const char *tablename,
- const void *entry,
- const struct xt_target *target,
- void *targinfo,
- unsigned int hook_mask)
+static bool ipt_snat_checkentry(const struct xt_tgchk_param *par)
{
- struct nf_nat_multi_range_compat *mr = targinfo;
+ const struct nf_nat_multi_range_compat *mr = par->targinfo;
/* Must be a valid range */
if (mr->rangesize != 1) {
return true;
}
-static bool ipt_dnat_checkentry(const char *tablename,
- const void *entry,
- const struct xt_target *target,
- void *targinfo,
- unsigned int hook_mask)
+static bool ipt_dnat_checkentry(const struct xt_tgchk_param *par)
{
- struct nf_nat_multi_range_compat *mr = targinfo;
+ const struct nf_nat_multi_range_compat *mr = par->targinfo;
/* Must be a valid range */
if (mr->rangesize != 1) {
struct nf_nat_range range
= { IP_NAT_RANGE_MAP_IPS, ip, ip, { 0 }, { 0 } };
- DEBUGP("Allocating NULL binding for %p (%u.%u.%u.%u)\n",
- ct, NIPQUAD(ip));
- return nf_nat_setup_info(ct, &range, hooknum);
+ pr_debug("Allocating NULL binding for %p (%pI4)\n", ct, &ip);
+ 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);
- u_int16_t 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 } };
-
- DEBUGP("Allocating NULL binding for confirmed %p (%u.%u.%u.%u)\n",
- ct, NIPQUAD(ip));
- return nf_nat_setup_info(ct, &range, hooknum);
-}
-
-int nf_nat_rule_find(struct sk_buff **pskb,
+int nf_nat_rule_find(struct sk_buff *skb,
unsigned int hooknum,
const struct net_device *in,
const struct net_device *out,
struct nf_conn *ct)
{
+ struct net *net = nf_ct_net(ct);
int ret;
- ret = ipt_do_table(pskb, hooknum, in, out, &nat_table);
+ ret = ipt_do_table(skb, hooknum, in, out, net->ipv4.nat_table);
if (ret == NF_ACCEPT) {
if (!nf_nat_initialized(ct, HOOK2MANIP(hooknum)))
.target = ipt_snat_target,
.targetsize = sizeof(struct nf_nat_multi_range_compat),
.table = "nat",
- .hooks = 1 << NF_IP_POST_ROUTING,
+ .hooks = 1 << NF_INET_POST_ROUTING,
.checkentry = ipt_snat_checkentry,
.family = AF_INET,
};
.target = ipt_dnat_target,
.targetsize = sizeof(struct nf_nat_multi_range_compat),
.table = "nat",
- .hooks = (1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_LOCAL_OUT),
+ .hooks = (1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_OUT),
.checkentry = ipt_dnat_checkentry,
.family = AF_INET,
};
+static int __net_init nf_nat_rule_net_init(struct net *net)
+{
+ struct ipt_replace *repl;
+
+ repl = ipt_alloc_initial_table(&nat_table);
+ if (repl == NULL)
+ return -ENOMEM;
+ net->ipv4.nat_table = ipt_register_table(net, &nat_table, repl);
+ kfree(repl);
+ if (IS_ERR(net->ipv4.nat_table))
+ return PTR_ERR(net->ipv4.nat_table);
+ return 0;
+}
+
+static void __net_exit nf_nat_rule_net_exit(struct net *net)
+{
+ ipt_unregister_table(net, net->ipv4.nat_table);
+}
+
+static struct pernet_operations nf_nat_rule_net_ops = {
+ .init = nf_nat_rule_net_init,
+ .exit = nf_nat_rule_net_exit,
+};
+
int __init nf_nat_rule_init(void)
{
int ret;
- ret = ipt_register_table(&nat_table, &nat_initial_table.repl);
+ ret = register_pernet_subsys(&nf_nat_rule_net_ops);
if (ret != 0)
- return ret;
+ goto out;
ret = xt_register_target(&ipt_snat_reg);
if (ret != 0)
goto unregister_table;
unregister_snat:
xt_unregister_target(&ipt_snat_reg);
unregister_table:
- ipt_unregister_table(&nat_table);
-
+ unregister_pernet_subsys(&nf_nat_rule_net_ops);
+ out:
return ret;
}
{
xt_unregister_target(&ipt_dnat_reg);
xt_unregister_target(&ipt_snat_reg);
- ipt_unregister_table(&nat_table);
+ unregister_pernet_subsys(&nf_nat_rule_net_ops);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff