/* Calculated at init based on memory size */
static unsigned int nf_nat_htable_size __read_mostly;
-static int nf_nat_vmalloced;
-
-static struct hlist_head *bysource __read_mostly;
#define MAX_IP_NAT_PROTO 256
static const struct nf_nat_protocol *nf_nat_protos[MAX_IP_NAT_PROTO]
/* Only called for SRC manip */
static int
-find_appropriate_src(const struct nf_conntrack_tuple *tuple,
+find_appropriate_src(struct net *net,
+ const struct nf_conntrack_tuple *tuple,
struct nf_conntrack_tuple *result,
const struct nf_nat_range *range)
{
const struct hlist_node *n;
rcu_read_lock();
- hlist_for_each_entry_rcu(nat, n, &bysource[h], bysource) {
+ hlist_for_each_entry_rcu(nat, n, &net->ipv4.nat_bysource[h], bysource) {
ct = nat->ct;
if (same_src(ct, tuple)) {
/* Copy source part from reply tuple. */
minip = ntohl(range->min_ip);
maxip = ntohl(range->max_ip);
j = jhash_2words((__force u32)tuple->src.u3.ip,
- (__force u32)tuple->dst.u3.ip, 0);
+ range->flags & IP_NAT_RANGE_PERSISTENT ?
+ 0 : (__force u32)tuple->dst.u3.ip, 0);
j = ((u64)j * (maxip - minip + 1)) >> 32;
*var_ipp = htonl(minip + j);
}
struct nf_conn *ct,
enum nf_nat_manip_type maniptype)
{
+ struct net *net = nf_ct_net(ct);
const struct nf_nat_protocol *proto;
/* 1) If this srcip/proto/src-proto-part is currently mapped,
manips not an issue. */
if (maniptype == IP_NAT_MANIP_SRC &&
!(range->flags & IP_NAT_RANGE_PROTO_RANDOM)) {
- if (find_appropriate_src(orig_tuple, tuple, range)) {
+ if (find_appropriate_src(net, orig_tuple, tuple, range)) {
pr_debug("get_unique_tuple: Found current src map\n");
if (!nf_nat_used_tuple(tuple, ct))
return;
const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype)
{
+ struct net *net = nf_ct_net(ct);
struct nf_conntrack_tuple curr_tuple, new_tuple;
struct nf_conn_nat *nat;
int have_to_hash = !(ct->status & IPS_NAT_DONE_MASK);
/* nf_conntrack_alter_reply might re-allocate exntension aera */
nat = nfct_nat(ct);
nat->ct = ct;
- hlist_add_head_rcu(&nat->bysource, &bysource[srchash]);
+ hlist_add_head_rcu(&nat->bysource,
+ &net->ipv4.nat_bysource[srchash]);
spin_unlock_bh(&nf_nat_lock);
}
.flags = NF_CT_EXT_F_PREALLOC,
};
+#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
+
+#include <linux/netfilter/nfnetlink.h>
+#include <linux/netfilter/nfnetlink_conntrack.h>
+
+static const struct nla_policy protonat_nla_policy[CTA_PROTONAT_MAX+1] = {
+ [CTA_PROTONAT_PORT_MIN] = { .type = NLA_U16 },
+ [CTA_PROTONAT_PORT_MAX] = { .type = NLA_U16 },
+};
+
+static int nfnetlink_parse_nat_proto(struct nlattr *attr,
+ const struct nf_conn *ct,
+ struct nf_nat_range *range)
+{
+ struct nlattr *tb[CTA_PROTONAT_MAX+1];
+ const struct nf_nat_protocol *npt;
+ int err;
+
+ err = nla_parse_nested(tb, CTA_PROTONAT_MAX, attr, protonat_nla_policy);
+ if (err < 0)
+ return err;
+
+ npt = nf_nat_proto_find_get(nf_ct_protonum(ct));
+ if (npt->nlattr_to_range)
+ err = npt->nlattr_to_range(tb, range);
+ nf_nat_proto_put(npt);
+ return err;
+}
+
+static const struct nla_policy nat_nla_policy[CTA_NAT_MAX+1] = {
+ [CTA_NAT_MINIP] = { .type = NLA_U32 },
+ [CTA_NAT_MAXIP] = { .type = NLA_U32 },
+};
+
+static int
+nfnetlink_parse_nat(const struct nlattr *nat,
+ const struct nf_conn *ct, struct nf_nat_range *range)
+{
+ struct nlattr *tb[CTA_NAT_MAX+1];
+ int err;
+
+ memset(range, 0, sizeof(*range));
+
+ err = nla_parse_nested(tb, CTA_NAT_MAX, nat, nat_nla_policy);
+ if (err < 0)
+ return err;
+
+ if (tb[CTA_NAT_MINIP])
+ range->min_ip = nla_get_be32(tb[CTA_NAT_MINIP]);
+
+ if (!tb[CTA_NAT_MAXIP])
+ range->max_ip = range->min_ip;
+ else
+ range->max_ip = nla_get_be32(tb[CTA_NAT_MAXIP]);
+
+ if (range->min_ip)
+ range->flags |= IP_NAT_RANGE_MAP_IPS;
+
+ if (!tb[CTA_NAT_PROTO])
+ return 0;
+
+ err = nfnetlink_parse_nat_proto(tb[CTA_NAT_PROTO], ct, range);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+static int
+nfnetlink_parse_nat_setup(struct nf_conn *ct,
+ enum nf_nat_manip_type manip,
+ const struct nlattr *attr)
+{
+ struct nf_nat_range range;
+
+ if (nfnetlink_parse_nat(attr, ct, &range) < 0)
+ return -EINVAL;
+ if (nf_nat_initialized(ct, manip))
+ return -EEXIST;
+
+ return nf_nat_setup_info(ct, &range, manip);
+}
+#else
+static int
+nfnetlink_parse_nat_setup(struct nf_conn *ct,
+ enum nf_nat_manip_type manip,
+ const struct nlattr *attr)
+{
+ return -EOPNOTSUPP;
+}
+#endif
+
+static int __net_init nf_nat_net_init(struct net *net)
+{
+ net->ipv4.nat_bysource = nf_ct_alloc_hashtable(&nf_nat_htable_size,
+ &net->ipv4.nat_vmalloced, 0);
+ if (!net->ipv4.nat_bysource)
+ return -ENOMEM;
+ return 0;
+}
+
+/* Clear NAT section of all conntracks, in case we're loaded again. */
+static int clean_nat(struct nf_conn *i, void *data)
+{
+ struct nf_conn_nat *nat = nfct_nat(i);
+
+ if (!nat)
+ return 0;
+ memset(nat, 0, sizeof(*nat));
+ i->status &= ~(IPS_NAT_MASK | IPS_NAT_DONE_MASK | IPS_SEQ_ADJUST);
+ return 0;
+}
+
+static void __net_exit nf_nat_net_exit(struct net *net)
+{
+ nf_ct_iterate_cleanup(net, &clean_nat, NULL);
+ synchronize_rcu();
+ nf_ct_free_hashtable(net->ipv4.nat_bysource, net->ipv4.nat_vmalloced,
+ nf_nat_htable_size);
+}
+
+static struct pernet_operations nf_nat_net_ops = {
+ .init = nf_nat_net_init,
+ .exit = nf_nat_net_exit,
+};
+
static int __init nf_nat_init(void)
{
size_t i;
/* Leave them the same for the moment. */
nf_nat_htable_size = nf_conntrack_htable_size;
- bysource = nf_ct_alloc_hashtable(&nf_nat_htable_size,
- &nf_nat_vmalloced);
- if (!bysource) {
- ret = -ENOMEM;
+ ret = register_pernet_subsys(&nf_nat_net_ops);
+ if (ret < 0)
goto cleanup_extend;
- }
/* Sew in builtin protocols. */
spin_lock_bh(&nf_nat_lock);
BUG_ON(nf_nat_seq_adjust_hook != NULL);
rcu_assign_pointer(nf_nat_seq_adjust_hook, nf_nat_seq_adjust);
+ BUG_ON(nfnetlink_parse_nat_setup_hook != NULL);
+ rcu_assign_pointer(nfnetlink_parse_nat_setup_hook,
+ nfnetlink_parse_nat_setup);
+ BUG_ON(nf_ct_nat_offset != NULL);
+ rcu_assign_pointer(nf_ct_nat_offset, nf_nat_get_offset);
return 0;
cleanup_extend:
return ret;
}
-/* Clear NAT section of all conntracks, in case we're loaded again. */
-static int clean_nat(struct nf_conn *i, void *data)
-{
- struct nf_conn_nat *nat = nfct_nat(i);
-
- if (!nat)
- return 0;
- memset(nat, 0, sizeof(*nat));
- i->status &= ~(IPS_NAT_MASK | IPS_NAT_DONE_MASK | IPS_SEQ_ADJUST);
- return 0;
-}
-
static void __exit nf_nat_cleanup(void)
{
- nf_ct_iterate_cleanup(&clean_nat, NULL);
- synchronize_rcu();
- nf_ct_free_hashtable(bysource, nf_nat_vmalloced, nf_nat_htable_size);
+ unregister_pernet_subsys(&nf_nat_net_ops);
nf_ct_l3proto_put(l3proto);
nf_ct_extend_unregister(&nat_extend);
rcu_assign_pointer(nf_nat_seq_adjust_hook, NULL);
+ rcu_assign_pointer(nfnetlink_parse_nat_setup_hook, NULL);
+ rcu_assign_pointer(nf_ct_nat_offset, NULL);
synchronize_net();
}
MODULE_LICENSE("GPL");
+MODULE_ALIAS("nf-nat-ipv4");
module_init(nf_nat_init);
module_exit(nf_nat_cleanup);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff