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netfilter: ipset: Add hash:net,port,net module to kernel.

Browse source 
This adds a new set that provides similar functionality to ip,port,net
but permits arbitrary size subnets for both the first and last
parameter.

Signed-off-by: Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
This commit is contained in:
Oliver Smith 2013-09-28 20:33:23 +02:00 committed by Jozsef Kadlecsik
parent 1785e8f473
commit 7c3ad056ef
3 changed files with 598 additions and 0 deletions
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9
net/netfilter/ipset/Kconfig
View file

@ -90,6 +90,15 @@ config IP_SET_HASH_IPPORTNET
To compile it as a module, choose M here. If unsure, say N.
config IP_SET_HASH_NETPORTNET
tristate "hash:net,port,net set support"
depends on IP_SET
help
This option adds the hash:net,port,net set type support, by which
one can store two IPv4/IPv6 subnets, and a protocol/port in a set.
To compile it as a module, choose M here. If unsure, say N.
config IP_SET_HASH_NET
tristate "hash:net set support"
depends on IP_SET

1
net/netfilter/ipset/Makefile
View file

@ -21,6 +21,7 @@ obj-$(CONFIG_IP_SET_HASH_NET) += ip_set_hash_net.o
obj-$(CONFIG_IP_SET_HASH_NETPORT) += ip_set_hash_netport.o
obj-$(CONFIG_IP_SET_HASH_NETIFACE) += ip_set_hash_netiface.o
obj-$(CONFIG_IP_SET_HASH_NETNET) += ip_set_hash_netnet.o
obj-$(CONFIG_IP_SET_HASH_NETPORTNET) += ip_set_hash_netportnet.o
# list types
obj-$(CONFIG_IP_SET_LIST_SET) += ip_set_list_set.o

588
net/netfilter/ipset/ip_set_hash_netportnet.c Normal file
View file

@ -0,0 +1,588 @@
/* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/* Kernel module implementing an IP set type: the hash:ip,port,net type */
#include <linux/jhash.h>
#include <linux/module.h>
#include <linux/ip.h>
#include <linux/skbuff.h>
#include <linux/errno.h>
#include <linux/random.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <net/netlink.h>
#include <net/tcp.h>
#include <linux/netfilter.h>
#include <linux/netfilter/ipset/pfxlen.h>
#include <linux/netfilter/ipset/ip_set.h>
#include <linux/netfilter/ipset/ip_set_getport.h>
#include <linux/netfilter/ipset/ip_set_hash.h>
#define IPSET_TYPE_REV_MIN 0
#define IPSET_TYPE_REV_MAX 0 /* Comments support added */
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>");
IP_SET_MODULE_DESC("hash:net,port,net", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
MODULE_ALIAS("ip_set_hash:net,port,net");
/* Type specific function prefix */
#define HTYPE hash_netportnet
#define IP_SET_HASH_WITH_PROTO
#define IP_SET_HASH_WITH_NETS
#define IPSET_NET_COUNT 2
/* IPv4 variant */
/* Member elements */
struct hash_netportnet4_elem {
union {
__be32 ip[2];
__be64 ipcmp;
};
__be16 port;
union {
u8 cidr[2];
u16 ccmp;
};
u8 nomatch:1;
u8 proto;
};
/* Common functions */
static inline bool
hash_netportnet4_data_equal(const struct hash_netportnet4_elem *ip1,
const struct hash_netportnet4_elem *ip2,
u32 *multi)
{
return ip1->ipcmp == ip2->ipcmp &&
ip1->ccmp == ip2->ccmp &&
ip1->port == ip2->port &&
ip1->proto == ip2->proto;
}
static inline int
hash_netportnet4_do_data_match(const struct hash_netportnet4_elem *elem)
{
return elem->nomatch ? -ENOTEMPTY : 1;
}
static inline void
hash_netportnet4_data_set_flags(struct hash_netportnet4_elem *elem, u32 flags)
{
elem->nomatch = !!((flags >> 16) & IPSET_FLAG_NOMATCH);
}
static inline void
hash_netportnet4_data_reset_flags(struct hash_netportnet4_elem *elem, u8 *flags)
{
swap(*flags, elem->nomatch);
}
static inline void
hash_netportnet4_data_reset_elem(struct hash_netportnet4_elem *elem,
struct hash_netportnet4_elem *orig)
{
elem->ip[1] = orig->ip[1];
}
static inline void
hash_netportnet4_data_netmask(struct hash_netportnet4_elem *elem,
u8 cidr, bool inner)
{
if (inner) {
elem->ip[1] &= ip_set_netmask(cidr);
elem->cidr[1] = cidr;
} else {
elem->ip[0] &= ip_set_netmask(cidr);
elem->cidr[0] = cidr;
}
}
static bool
hash_netportnet4_data_list(struct sk_buff *skb,
const struct hash_netportnet4_elem *data)
{
u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip[0]) ||
nla_put_ipaddr4(skb, IPSET_ATTR_IP2, data->ip[1]) ||
nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
(flags &&
nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
goto nla_put_failure;
return 0;
nla_put_failure:
return 1;
}
static inline void
hash_netportnet4_data_next(struct hash_netportnet4_elem *next,
const struct hash_netportnet4_elem *d)
{
next->ipcmp = d->ipcmp;
next->port = d->port;
}
#define MTYPE hash_netportnet4
#define PF 4
#define HOST_MASK 32
#include "ip_set_hash_gen.h"
static int
hash_netportnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
const struct xt_action_param *par,
enum ipset_adt adt, struct ip_set_adt_opt *opt)
{
const struct hash_netportnet *h = set->data;
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_netportnet4_elem e = {
.cidr[0] = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK),
.cidr[1] = IP_SET_INIT_CIDR(h->nets[0].cidr[1], HOST_MASK),
};
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
if (adt == IPSET_TEST)
e.ccmp = (HOST_MASK << (sizeof(e.cidr[0]) * 8)) | HOST_MASK;
if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
&e.port, &e.proto))
return -EINVAL;
ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0]);
ip4addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip[1]);
e.ip[0] &= ip_set_netmask(e.cidr[0]);
e.ip[1] &= ip_set_netmask(e.cidr[1]);
return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
}
static int
hash_netportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{
const struct hash_netportnet *h = set->data;
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_netportnet4_elem e = { .cidr[0] = HOST_MASK,
.cidr[1] = HOST_MASK };
struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
u32 ip = 0, ip_to = 0, ip_last, p = 0, port, port_to;
u32 ip2_from = 0, ip2_to = 0, ip2_last, ip2;
bool with_ports = false;
u8 cidr, cidr2;
int ret;
if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
!ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS) ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES)))
return -IPSET_ERR_PROTOCOL;
if (tb[IPSET_ATTR_LINENO])
*lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip) ||
ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2], &ip2_from) ||
ip_set_get_extensions(set, tb, &ext);
if (ret)
return ret;
if (tb[IPSET_ATTR_CIDR]) {
cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
if (!cidr || cidr > HOST_MASK)
return -IPSET_ERR_INVALID_CIDR;
e.cidr[0] = cidr;
}
if (tb[IPSET_ATTR_CIDR2]) {
cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
if (!cidr || cidr > HOST_MASK)
return -IPSET_ERR_INVALID_CIDR;
e.cidr[1] = cidr;
}
if (tb[IPSET_ATTR_PORT])
e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
else
return -IPSET_ERR_PROTOCOL;
if (tb[IPSET_ATTR_PROTO]) {
e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
with_ports = ip_set_proto_with_ports(e.proto);
if (e.proto == 0)
return -IPSET_ERR_INVALID_PROTO;
} else
return -IPSET_ERR_MISSING_PROTO;
if (!(with_ports || e.proto == IPPROTO_ICMP))
e.port = 0;
if (tb[IPSET_ATTR_CADT_FLAGS]) {
u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
if (cadt_flags & IPSET_FLAG_NOMATCH)
flags |= (IPSET_FLAG_NOMATCH << 16);
}
with_ports = with_ports && tb[IPSET_ATTR_PORT_TO];
if (adt == IPSET_TEST ||
!(tb[IPSET_ATTR_IP_TO] || with_ports || tb[IPSET_ATTR_IP2_TO])) {
e.ip[0] = htonl(ip & ip_set_hostmask(e.cidr[0]));
e.ip[1] = htonl(ip2_from & ip_set_hostmask(e.cidr[1]));
ret = adtfn(set, &e, &ext, &ext, flags);
return ip_set_enomatch(ret, flags, adt, set) ? -ret :
ip_set_eexist(ret, flags) ? 0 : ret;
}
ip_to = ip;
if (tb[IPSET_ATTR_IP_TO]) {
ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
if (ret)
return ret;
if (ip > ip_to)
swap(ip, ip_to);
if (unlikely(ip + UINT_MAX == ip_to))
return -IPSET_ERR_HASH_RANGE;
}
port_to = port = ntohs(e.port);
if (tb[IPSET_ATTR_PORT_TO]) {
port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
if (port > port_to)
swap(port, port_to);
}
ip2_to = ip2_from;
if (tb[IPSET_ATTR_IP2_TO]) {
ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2_TO], &ip2_to);
if (ret)
return ret;
if (ip2_from > ip2_to)
swap(ip2_from, ip2_to);
if (unlikely(ip2_from + UINT_MAX == ip2_to))
return -IPSET_ERR_HASH_RANGE;
}
if (retried)
ip = ntohl(h->next.ip[0]);
while (!after(ip, ip_to)) {
e.ip[0] = htonl(ip);
ip_last = ip_set_range_to_cidr(ip, ip_to, &cidr);
e.cidr[0] = cidr;
p = retried && ip == ntohl(h->next.ip[0]) ? ntohs(h->next.port)
: port;
for (; p <= port_to; p++) {
e.port = htons(p);
ip2 = (retried && ip == ntohl(h->next.ip[0]) &&
p == ntohs(h->next.port)) ? ntohl(h->next.ip[1])
: ip2_from;
while (!after(ip2, ip2_to)) {
e.ip[1] = htonl(ip2);
ip2_last = ip_set_range_to_cidr(ip2, ip2_to,
&cidr2);
e.cidr[1] = cidr2;
ret = adtfn(set, &e, &ext, &ext, flags);
if (ret && !ip_set_eexist(ret, flags))
return ret;
else
ret = 0;
ip2 = ip2_last + 1;
}
}
ip = ip_last + 1;
}
return ret;
}
/* IPv6 variant */
struct hash_netportnet6_elem {
union nf_inet_addr ip[2];
__be16 port;
union {
u8 cidr[2];
u16 ccmp;
};
u8 nomatch:1;
u8 proto;
};
/* Common functions */
static inline bool
hash_netportnet6_data_equal(const struct hash_netportnet6_elem *ip1,
const struct hash_netportnet6_elem *ip2,
u32 *multi)
{
return ipv6_addr_equal(&ip1->ip[0].in6, &ip2->ip[0].in6) &&
ipv6_addr_equal(&ip1->ip[1].in6, &ip2->ip[1].in6) &&
ip1->ccmp == ip2->ccmp &&
ip1->port == ip2->port &&
ip1->proto == ip2->proto;
}
static inline int
hash_netportnet6_do_data_match(const struct hash_netportnet6_elem *elem)
{
return elem->nomatch ? -ENOTEMPTY : 1;
}
static inline void
hash_netportnet6_data_set_flags(struct hash_netportnet6_elem *elem, u32 flags)
{
elem->nomatch = !!((flags >> 16) & IPSET_FLAG_NOMATCH);
}
static inline void
hash_netportnet6_data_reset_flags(struct hash_netportnet6_elem *elem, u8 *flags)
{
swap(*flags, elem->nomatch);
}
static inline void
hash_netportnet6_data_reset_elem(struct hash_netportnet6_elem *elem,
struct hash_netportnet6_elem *orig)
{
elem->ip[1] = orig->ip[1];
}
static inline void
hash_netportnet6_data_netmask(struct hash_netportnet6_elem *elem,
u8 cidr, bool inner)
{
if (inner) {
ip6_netmask(&elem->ip[1], cidr);
elem->cidr[1] = cidr;
} else {
ip6_netmask(&elem->ip[0], cidr);
elem->cidr[0] = cidr;
}
}
static bool
hash_netportnet6_data_list(struct sk_buff *skb,
const struct hash_netportnet6_elem *data)
{
u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;
if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip[0].in6) ||
nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip[1].in6) ||
nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr[0]) ||
nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr[1]) ||
nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
(flags &&
nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
goto nla_put_failure;
return 0;
nla_put_failure:
return 1;
}
static inline void
hash_netportnet6_data_next(struct hash_netportnet4_elem *next,
const struct hash_netportnet6_elem *d)
{
next->port = d->port;
}
#undef MTYPE
#undef PF
#undef HOST_MASK
#define MTYPE hash_netportnet6
#define PF 6
#define HOST_MASK 128
#define IP_SET_EMIT_CREATE
#include "ip_set_hash_gen.h"
static int
hash_netportnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
const struct xt_action_param *par,
enum ipset_adt adt, struct ip_set_adt_opt *opt)
{
const struct hash_netportnet *h = set->data;
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_netportnet6_elem e = {
.cidr[0] = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK),
.cidr[1] = IP_SET_INIT_CIDR(h->nets[0].cidr[1], HOST_MASK),
};
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
if (adt == IPSET_TEST)
e.ccmp = (HOST_MASK << (sizeof(u8) * 8)) | HOST_MASK;
if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
&e.port, &e.proto))
return -EINVAL;
ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip[0].in6);
ip6addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &e.ip[1].in6);
ip6_netmask(&e.ip[0], e.cidr[0]);
ip6_netmask(&e.ip[1], e.cidr[1]);
return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
}
static int
hash_netportnet6_uadt(struct ip_set *set, struct nlattr *tb[],
enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{
const struct hash_netportnet *h = set->data;
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_netportnet6_elem e = { .cidr[0] = HOST_MASK,
.cidr[1] = HOST_MASK };
struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
u32 port, port_to;
bool with_ports = false;
int ret;
if (unlikely(!tb[IPSET_ATTR_IP] || !tb[IPSET_ATTR_IP2] ||
!ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO) ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS) ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES)))
return -IPSET_ERR_PROTOCOL;
if (unlikely(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_IP2_TO]))
return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
if (tb[IPSET_ATTR_LINENO])
*lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip[0]) ||
ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &e.ip[1]) ||
ip_set_get_extensions(set, tb, &ext);
if (ret)
return ret;
if (tb[IPSET_ATTR_CIDR])
e.cidr[0] = nla_get_u8(tb[IPSET_ATTR_CIDR]);
if (tb[IPSET_ATTR_CIDR2])
e.cidr[1] = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
if (unlikely(!e.cidr[0] || e.cidr[0] > HOST_MASK || !e.cidr[1] ||
e.cidr[1] > HOST_MASK))
return -IPSET_ERR_INVALID_CIDR;
ip6_netmask(&e.ip[0], e.cidr[0]);
ip6_netmask(&e.ip[1], e.cidr[1]);
if (tb[IPSET_ATTR_PORT])
e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
else
return -IPSET_ERR_PROTOCOL;
if (tb[IPSET_ATTR_PROTO]) {
e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
with_ports = ip_set_proto_with_ports(e.proto);
if (e.proto == 0)
return -IPSET_ERR_INVALID_PROTO;
} else
return -IPSET_ERR_MISSING_PROTO;
if (!(with_ports || e.proto == IPPROTO_ICMPV6))
e.port = 0;
if (tb[IPSET_ATTR_CADT_FLAGS]) {
u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
if (cadt_flags & IPSET_FLAG_NOMATCH)
flags |= (IPSET_FLAG_NOMATCH << 16);
}
if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
ret = adtfn(set, &e, &ext, &ext, flags);
return ip_set_enomatch(ret, flags, adt, set) ? -ret :
ip_set_eexist(ret, flags) ? 0 : ret;
}
port = ntohs(e.port);
port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
if (port > port_to)
swap(port, port_to);
if (retried)
port = ntohs(h->next.port);
for (; port <= port_to; port++) {
e.port = htons(port);
ret = adtfn(set, &e, &ext, &ext, flags);
if (ret && !ip_set_eexist(ret, flags))
return ret;
else
ret = 0;
}
return ret;
}
static struct ip_set_type hash_netportnet_type __read_mostly = {
.name = "hash:net,port,net",
.protocol = IPSET_PROTOCOL,
.features = IPSET_TYPE_IP | IPSET_TYPE_PORT | IPSET_TYPE_IP2 |
IPSET_TYPE_NOMATCH,
.dimension = IPSET_DIM_THREE,
.family = NFPROTO_UNSPEC,
.revision_min = IPSET_TYPE_REV_MIN,
.revision_max = IPSET_TYPE_REV_MAX,
.create = hash_netportnet_create,
.create_policy = {
[IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
[IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
[IPSET_ATTR_PROBES] = { .type = NLA_U8 },
[IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
[IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
[IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
},
.adt_policy = {
[IPSET_ATTR_IP] = { .type = NLA_NESTED },
[IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
[IPSET_ATTR_IP2] = { .type = NLA_NESTED },
[IPSET_ATTR_IP2_TO] = { .type = NLA_NESTED },
[IPSET_ATTR_PORT] = { .type = NLA_U16 },
[IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
[IPSET_ATTR_CIDR] = { .type = NLA_U8 },
[IPSET_ATTR_CIDR2] = { .type = NLA_U8 },
[IPSET_ATTR_PROTO] = { .type = NLA_U8 },
[IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
[IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
[IPSET_ATTR_LINENO] = { .type = NLA_U32 },
[IPSET_ATTR_BYTES] = { .type = NLA_U64 },
[IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
[IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING },
},
.me = THIS_MODULE,
};
static int __init
hash_netportnet_init(void)
{
return ip_set_type_register(&hash_netportnet_type);
}
static void __exit
hash_netportnet_fini(void)
{
ip_set_type_unregister(&hash_netportnet_type);
}
module_init(hash_netportnet_init);
module_exit(hash_netportnet_fini);