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netfilter: ipset: hash:ipmac type support added to ipset 

Introduce the hash:ipmac type.

Signed-off-by: Tomasz Chili??ski <tomasz.chilinski@chilan.com>
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
This commit is contained in:
Tomasz Chilinski 2016-05-05 07:21:26 +02:00 committed by Jozsef Kadlecsik
parent a71bdbfa99
commit c0db95c7bc
3 changed files with 325 additions and 0 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_IPMAC
tristate "hash:ip,mac set support"
depends on IP_SET
help
This option adds the hash:ip,mac set type support, by which
one can store IPv4/IPv6 address and MAC (ethernet address) pairs in a set.
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

1
net/netfilter/ipset/Makefile
View File

@ -14,6 +14,7 @@ obj-$(CONFIG_IP_SET_BITMAP_PORT) += ip_set_bitmap_port.o
# hash types
obj-$(CONFIG_IP_SET_HASH_IP) += ip_set_hash_ip.o
obj-$(CONFIG_IP_SET_HASH_IPMAC) += ip_set_hash_ipmac.o
obj-$(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

315
net/netfilter/ipset/ip_set_hash_ipmac.c Normal file
View File

@ -0,0 +1,315 @@
/* Copyright (C) 2016 Tomasz Chilinski <tomasz.chilinski@chilan.com>
*
* 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,mac type */
#include <linux/jhash.h>
#include <linux/module.h>
#include <linux/ip.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/errno.h>
#include <linux/random.h>
#include <linux/if_ether.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_hash.h>
#define IPSET_TYPE_REV_MIN 0
#define IPSET_TYPE_REV_MAX 0
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Tomasz Chilinski <tomasz.chilinski@chilan.com>");
IP_SET_MODULE_DESC("hash:ip,mac", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
MODULE_ALIAS("ip_set_hash:ip,mac");
/* Type specific function prefix */
#define HTYPE hash_ipmac
/* Zero valued element is not supported */
static const unsigned char invalid_ether[ETH_ALEN] = { 0 };
/* IPv4 variant */
/* Member elements */
struct hash_ipmac4_elem {
/* Zero valued IP addresses cannot be stored */
__be32 ip;
union {
unsigned char ether[ETH_ALEN];
__be32 foo[2];
};
};
/* Common functions */
static inline bool
hash_ipmac4_data_equal(const struct hash_ipmac4_elem *e1,
const struct hash_ipmac4_elem *e2,
u32 *multi)
{
return e1->ip == e2->ip && ether_addr_equal(e1->ether, e2->ether);
}
static bool
hash_ipmac4_data_list(struct sk_buff *skb, const struct hash_ipmac4_elem *e)
{
if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, e->ip) ||
nla_put(skb, IPSET_ATTR_ETHER, ETH_ALEN, e->ether))
goto nla_put_failure;
return 0;
nla_put_failure:
return 1;
}
static inline void
hash_ipmac4_data_next(struct hash_ipmac4_elem *next,
const struct hash_ipmac4_elem *e)
{
next->ip = e->ip;
}
#define MTYPE hash_ipmac4
#define PF 4
#define HOST_MASK 32
#define HKEY_DATALEN sizeof(struct hash_ipmac4_elem)
#include "ip_set_hash_gen.h"
static int
hash_ipmac4_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_ipmac4_elem e = { .ip = 0, { .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_TWO_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 (ether_addr_equal(e.ether, invalid_ether))
return -EINVAL;
ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
}
static int
hash_ipmac4_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_ipmac4_elem e = { .ip = 0, { .foo[0] = 0, .foo[1] = 0 } };
struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
int ret;
if (unlikely(!tb[IPSET_ATTR_IP] ||
!tb[IPSET_ATTR_ETHER] ||
nla_len(tb[IPSET_ATTR_ETHER]) != ETH_ALEN ||
!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_ipaddr4(tb[IPSET_ATTR_IP], &e.ip) ||
ip_set_get_extensions(set, tb, &ext);
if (ret)
return ret;
memcpy(e.ether, nla_data(tb[IPSET_ATTR_ETHER]), ETH_ALEN);
if (ether_addr_equal(e.ether, invalid_ether))
return -IPSET_ERR_HASH_ELEM;
return adtfn(set, &e, &ext, &ext, flags);
}
/* IPv6 variant */
/* Member elements */
struct hash_ipmac6_elem {
/* Zero valued IP addresses cannot be stored */
union nf_inet_addr ip;
union {
unsigned char ether[ETH_ALEN];
__be32 foo[2];
};
};
/* Common functions */
static inline bool
hash_ipmac6_data_equal(const struct hash_ipmac6_elem *e1,
const struct hash_ipmac6_elem *e2,
u32 *multi)
{
return ipv6_addr_equal(&e1->ip.in6, &e2->ip.in6) &&
ether_addr_equal(e1->ether, e2->ether);
}
static bool
hash_ipmac6_data_list(struct sk_buff *skb, const struct hash_ipmac6_elem *e)
{
if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &e->ip.in6) ||
nla_put(skb, IPSET_ATTR_ETHER, ETH_ALEN, e->ether))
goto nla_put_failure;
return 0;
nla_put_failure:
return 1;
}
static inline void
hash_ipmac6_data_next(struct hash_ipmac6_elem *next,
const struct hash_ipmac6_elem *e)
{
}
#undef MTYPE
#undef PF
#undef HOST_MASK
#undef HKEY_DATALEN
#define MTYPE hash_ipmac6
#define PF 6
#define HOST_MASK 128
#define HKEY_DATALEN sizeof(struct hash_ipmac6_elem)
#define IP_SET_EMIT_CREATE
#include "ip_set_hash_gen.h"
static int
hash_ipmac6_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_ipmac6_elem e = {
{ .all = { 0 } },
{ .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_TWO_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 (ether_addr_equal(e.ether, invalid_ether))
return -EINVAL;
ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
}
static int
hash_ipmac6_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_ipmac6_elem e = {
{ .all = { 0 } },
{ .foo[0] = 0, .foo[1] = 0 }
};
struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
int ret;
if (unlikely(!tb[IPSET_ATTR_IP] ||
!tb[IPSET_ATTR_ETHER] ||
nla_len(tb[IPSET_ATTR_ETHER]) != ETH_ALEN ||
!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_ipaddr6(tb[IPSET_ATTR_IP], &e.ip) ||
ip_set_get_extensions(set, tb, &ext);
if (ret)
return ret;
memcpy(e.ether, nla_data(tb[IPSET_ATTR_ETHER]), ETH_ALEN);
if (ether_addr_equal(e.ether, invalid_ether))
return -IPSET_ERR_HASH_ELEM;
return adtfn(set, &e, &ext, &ext, flags);
}
static struct ip_set_type hash_ipmac_type __read_mostly = {
.name = "hash:ip,mac",
.protocol = IPSET_PROTOCOL,
.features = IPSET_TYPE_IP | IPSET_TYPE_MAC,
.dimension = IPSET_DIM_TWO,
.family = NFPROTO_UNSPEC,
.revision_min = IPSET_TYPE_REV_MIN,
.revision_max = IPSET_TYPE_REV_MAX,
.create = hash_ipmac_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_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_ipmac_init(void)
{
return ip_set_type_register(&hash_ipmac_type);
}
static void __exit
hash_ipmac_fini(void)
{
ip_set_type_unregister(&hash_ipmac_type);
}
module_init(hash_ipmac_init);
module_exit(hash_ipmac_fini);