MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
MODULE_DESCRIPTION("Netfilter NAT protocol helper module for GRE");
-/* is key in given range between min and max */
-static int
-gre_in_range(const struct nf_conntrack_tuple *tuple,
- enum nf_nat_manip_type maniptype,
- const union nf_conntrack_man_proto *min,
- const union nf_conntrack_man_proto *max)
-{
- __be16 key;
-
- if (maniptype == IP_NAT_MANIP_SRC)
- key = tuple->src.u.gre.key;
- else
- key = tuple->dst.u.gre.key;
-
- return ntohs(key) >= ntohs(min->gre.key) &&
- ntohs(key) <= ntohs(max->gre.key);
-}
-
/* generate unique tuple ... */
static int
gre_unique_tuple(struct nf_conntrack_tuple *tuple,
const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype,
- const struct nf_conn *conntrack)
+ const struct nf_conn *ct)
{
static u_int16_t key;
__be16 *keyptr;
/* If there is no master conntrack we are not PPTP,
do not change tuples */
- if (!conntrack->master)
+ if (!ct->master)
return 0;
if (maniptype == IP_NAT_MANIP_SRC)
keyptr = &tuple->dst.u.gre.key;
if (!(range->flags & IP_NAT_RANGE_PROTO_SPECIFIED)) {
- pr_debug("%p: NATing GRE PPTP\n", conntrack);
+ pr_debug("%p: NATing GRE PPTP\n", ct);
min = 1;
range_size = 0xffff;
} else {
for (i = 0; i < range_size; i++, key++) {
*keyptr = htons(min + key % range_size);
- if (!nf_nat_used_tuple(tuple, conntrack))
+ if (!nf_nat_used_tuple(tuple, ct))
return 1;
}
- pr_debug("%p: no NAT mapping\n", conntrack);
+ pr_debug("%p: no NAT mapping\n", ct);
return 0;
}
{
struct gre_hdr *greh;
struct gre_hdr_pptp *pgreh;
- struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff);
+ const struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff);
unsigned int hdroff = iphdroff + iph->ihl * 4;
/* pgreh includes two optional 32bit fields which are not required
return 1;
}
-static struct nf_nat_protocol gre __read_mostly = {
- .name = "GRE",
+static const struct nf_nat_protocol gre = {
.protonum = IPPROTO_GRE,
+ .me = THIS_MODULE,
.manip_pkt = gre_manip_pkt,
- .in_range = gre_in_range,
+ .in_range = nf_nat_proto_in_range,
.unique_tuple = gre_unique_tuple,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
- .range_to_nlattr = nf_nat_port_range_to_nlattr,
- .nlattr_to_range = nf_nat_port_nlattr_to_range,
+ .range_to_nlattr = nf_nat_proto_range_to_nlattr,
+ .nlattr_to_range = nf_nat_proto_nlattr_to_range,
#endif
};
-int __init nf_nat_proto_gre_init(void)
+static int __init nf_nat_proto_gre_init(void)
{
return nf_nat_protocol_register(&gre);
}
-void __exit nf_nat_proto_gre_fini(void)
+static void __exit nf_nat_proto_gre_fini(void)
{
nf_nat_protocol_unregister(&gre);
}