#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_hash.h>
#define IPSET_TYPE_REV_MIN 0
#define IPSET_TYPE_REV_MAX 6
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@netfilter.org>");
IP_SET_MODULE_DESC("hash:ip", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
MODULE_ALIAS("ip_set_hash:ip");
#define HTYPE hash_ip
#define IP_SET_HASH_WITH_NETMASK
#define IP_SET_HASH_WITH_BITMASK
struct hash_ip4_elem {
__be32 ip;
};
static bool
hash_ip4_data_equal(const struct hash_ip4_elem *e1,
const struct hash_ip4_elem *e2,
u32 *multi)
{
return e1->ip == e2->ip;
}
static bool
hash_ip4_data_list(struct sk_buff *skb, const struct hash_ip4_elem *e)
{
if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, e->ip))
goto nla_put_failure;
return false;
nla_put_failure:
return true;
}
static void
hash_ip4_data_next(struct hash_ip4_elem *next, const struct hash_ip4_elem *e)
{
next->ip = e->ip;
}
#define MTYPE hash_ip4
#define HOST_MASK 32
#include "ip_set_hash_gen.h"
static int
hash_ip4_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_ip4 *h = set->data;
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_ip4_elem e = { 0 };
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
__be32 ip;
ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &ip);
ip &= h->bitmask.ip;
if (ip == 0)
return -EINVAL;
e.ip = ip;
return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
}
static int
hash_ip4_uadt(struct ip_set *set, struct nlattr *tb[],
enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{
struct hash_ip4 *h = set->data;
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_ip4_elem e = { 0 };
struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
u32 ip = 0, ip_to = 0, hosts, i = 0;
int ret = 0;
if (tb[IPSET_ATTR_LINENO])
*lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
if (unlikely(!tb[IPSET_ATTR_IP]))
return -IPSET_ERR_PROTOCOL;
ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip);
if (ret)
return ret;
ret = ip_set_get_extensions(set, tb, &ext);
if (ret)
return ret;
ip &= ntohl(h->bitmask.ip);
e.ip = htonl(ip);
if (e.ip == 0)
return -IPSET_ERR_HASH_ELEM;
if (adt == IPSET_TEST)
return adtfn(set, &e, &ext, &ext, flags);
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) {
if (ip_to == 0)
return -IPSET_ERR_HASH_ELEM;
swap(ip, ip_to);
}
} else if (tb[IPSET_ATTR_CIDR]) {
u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
if (!cidr || cidr > HOST_MASK)
return -IPSET_ERR_INVALID_CIDR;
ip_set_mask_from_to(ip, ip_to, cidr);
}
hosts = h->netmask == 32 ? 1 : 2 << (32 - h->netmask - 1);
if (retried)
ip = ntohl(h->next.ip);
for (; ip <= ip_to; i++) {
e.ip = htonl(ip);
if (i > IPSET_MAX_RANGE) {
hash_ip4_data_next(&h->next, &e);
return -ERANGE;
}
ret = adtfn(set, &e, &ext, &ext, flags);
if (ret && !ip_set_eexist(ret, flags))
return ret;
ip += hosts;
if (ip == 0)
return 0;
ret = 0;
}
return ret;
}
struct hash_ip6_elem {
union nf_inet_addr ip;
};
static bool
hash_ip6_data_equal(const struct hash_ip6_elem *ip1,
const struct hash_ip6_elem *ip2,
u32 *multi)
{
return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6);
}
static bool
hash_ip6_data_list(struct sk_buff *skb, const struct hash_ip6_elem *e)
{
if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &e->ip.in6))
goto nla_put_failure;
return false;
nla_put_failure:
return true;
}
static void
hash_ip6_data_next(struct hash_ip6_elem *next, const struct hash_ip6_elem *e)
{
}
#undef MTYPE
#undef HOST_MASK
#define MTYPE hash_ip6
#define HOST_MASK 128
#define IP_SET_EMIT_CREATE
#include "ip_set_hash_gen.h"
static int
hash_ip6_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_ip6 *h = set->data;
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_ip6_elem e = { { .all = { 0 } } };
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
nf_inet_addr_mask_inplace(&e.ip, &h->bitmask);
if (ipv6_addr_any(&e.ip.in6))
return -EINVAL;
return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
}
static int
hash_ip6_uadt(struct ip_set *set, struct nlattr *tb[],
enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{
const struct hash_ip6 *h = set->data;
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_ip6_elem e = { { .all = { 0 } } };
struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
int ret;
if (tb[IPSET_ATTR_LINENO])
*lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
if (unlikely(!tb[IPSET_ATTR_IP]))
return -IPSET_ERR_PROTOCOL;
if (unlikely(tb[IPSET_ATTR_IP_TO]))
return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
if (unlikely(tb[IPSET_ATTR_CIDR])) {
u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
if (cidr != HOST_MASK)
return -IPSET_ERR_INVALID_CIDR;
}
ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip);
if (ret)
return ret;
ret = ip_set_get_extensions(set, tb, &ext);
if (ret)
return ret;
nf_inet_addr_mask_inplace(&e.ip, &h->bitmask);
if (ipv6_addr_any(&e.ip.in6))
return -IPSET_ERR_HASH_ELEM;
ret = adtfn(set, &e, &ext, &ext, flags);
return ip_set_eexist(ret, flags) ? 0 : ret;
}
static struct ip_set_type hash_ip_type __read_mostly = {
.name = "hash:ip",
.protocol = IPSET_PROTOCOL,
.features = IPSET_TYPE_IP,
.dimension = IPSET_DIM_ONE,
.family = NFPROTO_UNSPEC,
.revision_min = IPSET_TYPE_REV_MIN,
.revision_max = IPSET_TYPE_REV_MAX,
.create_flags[IPSET_TYPE_REV_MAX] = IPSET_CREATE_FLAG_BUCKETSIZE,
.create = hash_ip_create,
.create_policy = {
[IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
[IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
[IPSET_ATTR_INITVAL] = { .type = NLA_U32 },
[IPSET_ATTR_BUCKETSIZE] = { .type = NLA_U8 },
[IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
[IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
[IPSET_ATTR_NETMASK] = { .type = NLA_U8 },
[IPSET_ATTR_BITMASK] = { .type = NLA_NESTED },
[IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
},
.adt_policy = {
[IPSET_ATTR_IP] = { .type = NLA_NESTED },
[IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
[IPSET_ATTR_CIDR] = { .type = NLA_U8 },
[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,
.len = IPSET_MAX_COMMENT_SIZE },
[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_ip_init(void)
{
return ip_set_type_register(&hash_ip_type);
}
static void __exit
hash_ip_fini(void)
{
rcu_barrier();
ip_set_type_unregister(&hash_ip_type);
}
module_init(hash_ip_init);
module_exit(hash_ip_fini);
