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netfilter: ipset: hash:mac type added to ipset

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Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
This commit is contained in:
Jozsef Kadlecsik 2014-09-15 17:36:06 +02:00
parent aef96193fe
commit 07034aeae1
4 changed files with 193 additions and 1 deletions
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9
net/netfilter/ipset/Kconfig
View file

@ -99,6 +99,15 @@ config IP_SET_HASH_IPPORTNET
To compile it as a module, choose M here. If unsure, say N.
config IP_SET_HASH_MAC
tristate "hash:mac set support"
depends on IP_SET
help
This option adds the hash:mac set type support, by which
one can store MAC (ethernet address) elements in a set.
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

1
net/netfilter/ipset/Makefile
View file

@ -18,6 +18,7 @@ obj-$(CONFIG_IP_SET_HASH_IPMARK) += ip_set_hash_ipmark.o
obj-$(CONFIG_IP_SET_HASH_IPPORT) += ip_set_hash_ipport.o
obj-$(CONFIG_IP_SET_HASH_IPPORTIP) += ip_set_hash_ipportip.o
obj-$(CONFIG_IP_SET_HASH_IPPORTNET) += ip_set_hash_ipportnet.o
obj-$(CONFIG_IP_SET_HASH_MAC) += ip_set_hash_mac.o
obj-$(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

11
net/netfilter/ipset/ip_set_hash_gen.h
View file

@ -1054,8 +1054,10 @@ IPSET_TOKEN(HTYPE, _create)(struct net *net, struct ip_set *set,
struct HTYPE *h;
struct htable *t;
#ifndef IP_SET_PROTO_UNDEF
if (!(set->family == NFPROTO_IPV4 || set->family == NFPROTO_IPV6))
return -IPSET_ERR_INVALID_FAMILY;
#endif
#ifdef IP_SET_HASH_WITH_MARKMASK
markmask = 0xffffffff;
@ -1137,25 +1139,32 @@ IPSET_TOKEN(HTYPE, _create)(struct net *net, struct ip_set *set,
rcu_assign_pointer(h->table, t);
set->data = h;
#ifndef IP_SET_PROTO_UNDEF
if (set->family == NFPROTO_IPV4) {
#endif
set->variant = &IPSET_TOKEN(HTYPE, 4_variant);
set->dsize = ip_set_elem_len(set, tb,
sizeof(struct IPSET_TOKEN(HTYPE, 4_elem)));
#ifndef IP_SET_PROTO_UNDEF
} else {
set->variant = &IPSET_TOKEN(HTYPE, 6_variant);
set->dsize = ip_set_elem_len(set, tb,
sizeof(struct IPSET_TOKEN(HTYPE, 6_elem)));
}
#endif
if (tb[IPSET_ATTR_TIMEOUT]) {
set->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
#ifndef IP_SET_PROTO_UNDEF
if (set->family == NFPROTO_IPV4)
#endif
IPSET_TOKEN(HTYPE, 4_gc_init)(set,
IPSET_TOKEN(HTYPE, 4_gc));
#ifndef IP_SET_PROTO_UNDEF
else
IPSET_TOKEN(HTYPE, 6_gc_init)(set,
IPSET_TOKEN(HTYPE, 6_gc));
#endif
}
pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
set->name, jhash_size(t->htable_bits),
t->htable_bits, h->maxelem, set->data, t);

173
net/netfilter/ipset/ip_set_hash_mac.c Normal file
View file

@ -0,0 +1,173 @@
/* Copyright (C) 2014 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:mac type */
#include <linux/jhash.h>
#include <linux/module.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/errno.h>
#include <linux/if_ether.h>
#include <net/netlink.h>
#include <linux/netfilter.h>
#include <linux/netfilter/ipset/ip_set.h>
#include <linux/netfilter/ipset/ip_set_hash.h>
#define IPSET_TYPE_REV_MIN 0
#define IPSET_TYPE_REV_MAX 0
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
IP_SET_MODULE_DESC("hash:mac", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
MODULE_ALIAS("ip_set_hash:mac");
/* Type specific function prefix */
#define HTYPE hash_mac
/* Member elements */
struct hash_mac4_elem {
/* Zero valued IP addresses cannot be stored */
union {
unsigned char ether[ETH_ALEN];
__be32 foo[2];
};
};
/* Common functions */
static inline bool
hash_mac4_data_equal(const struct hash_mac4_elem *e1,
const struct hash_mac4_elem *e2,
u32 *multi)
{
return ether_addr_equal(e1->ether, e2->ether);
}
static inline bool
hash_mac4_data_list(struct sk_buff *skb, const struct hash_mac4_elem *e)
{
return nla_put(skb, IPSET_ATTR_ETHER, ETH_ALEN, e->ether);
}
static inline void
hash_mac4_data_next(struct hash_mac4_elem *next,
const struct hash_mac4_elem *e)
{
}
#define MTYPE hash_mac4
#define PF 4
#define HOST_MASK 32
#define IP_SET_EMIT_CREATE
#define IP_SET_PROTO_UNDEF
#include "ip_set_hash_gen.h"
/* Zero valued element is not supported */
static const unsigned char invalid_ether[ETH_ALEN] = { 0 };
static int
hash_mac4_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)
{
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_mac4_elem e = { { .foo[0] = 0, .foo[1] = 0 } };
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
/* MAC can be src only */
if (!(opt->flags & IPSET_DIM_ONE_SRC))
return 0;
if (skb_mac_header(skb) < skb->head ||
(skb_mac_header(skb) + ETH_HLEN) > skb->data)
return -EINVAL;
memcpy(e.ether, eth_hdr(skb)->h_source, ETH_ALEN);
if (memcmp(e.ether, invalid_ether, ETH_ALEN) == 0)
return -EINVAL;
return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
}
static int
hash_mac4_uadt(struct ip_set *set, struct nlattr *tb[],
enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_mac4_elem e = { { .foo[0] = 0, .foo[1] = 0 } };
struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
int ret;
if (unlikely(!tb[IPSET_ATTR_ETHER] ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_SKBMARK) ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_SKBPRIO) ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_SKBQUEUE)))
return -IPSET_ERR_PROTOCOL;
if (tb[IPSET_ATTR_LINENO])
*lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
ret = ip_set_get_extensions(set, tb, &ext);
if (ret)
return ret;
memcpy(e.ether, nla_data(tb[IPSET_ATTR_ETHER]), ETH_ALEN);
if (memcmp(e.ether, invalid_ether, ETH_ALEN) == 0)
return -IPSET_ERR_HASH_ELEM;
return adtfn(set, &e, &ext, &ext, flags);
}
static struct ip_set_type hash_mac_type __read_mostly = {
.name = "hash:mac",
.protocol = IPSET_PROTOCOL,
.features = IPSET_TYPE_MAC,
.dimension = IPSET_DIM_ONE,
.family = NFPROTO_UNSPEC,
.revision_min = IPSET_TYPE_REV_MIN,
.revision_max = IPSET_TYPE_REV_MAX,
.create = hash_mac_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_ETHER] = { .type = NLA_BINARY,
.len = ETH_ALEN },
[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 },
[IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
[IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
[IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
},
.me = THIS_MODULE,
};
static int __init
hash_mac_init(void)
{
return ip_set_type_register(&hash_mac_type);
}
static void __exit
hash_mac_fini(void)
{
ip_set_type_unregister(&hash_mac_type);
}
module_init(hash_mac_init);
module_exit(hash_mac_fini);