/* Copyright (C) 2003-2011 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_timeout.h>
#include <linux/netfilter/ipset/ip_set_getport.h>
#include <linux/netfilter/ipset/ip_set_hash.h>

#define REVISION_MIN    0
/*                      1    SCTP and UDPLITE support added */
/*                      2    Range as input support for IPv4 added */
#define REVISION_MAX    3 /* nomatch flag support added */

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
IP_SET_MODULE_DESC("hash:ip,port,net", REVISION_MIN, REVISION_MAX);
MODULE_ALIAS("ip_set_hash:ip,port,net");

/* Type specific function prefix */
#define TYPE            hash_ipportnet

static bool
hash_ipportnet_same_set(const struct ip_set *a, const struct ip_set *b);

#define hash_ipportnet4_same_set        hash_ipportnet_same_set
#define hash_ipportnet6_same_set        hash_ipportnet_same_set

/* The type variant functions: IPv4 */

/* We squeeze the "nomatch" flag into cidr: we don't support cidr == 0
 * However this way we have to store internally cidr - 1,
 * dancing back and forth.
 */
#define IP_SET_HASH_WITH_NETS_PACKED

/* Member elements without timeout */
struct hash_ipportnet4_elem {
        __be32 ip;
        __be32 ip2;
        __be16 port;
        u8 cidr:7;
        u8 nomatch:1;
        u8 proto;
};

/* Member elements with timeout support */
struct hash_ipportnet4_telem {
        __be32 ip;
        __be32 ip2;
        __be16 port;
        u8 cidr:7;
        u8 nomatch:1;
        u8 proto;
        unsigned long timeout;
};

static inline bool
hash_ipportnet4_data_equal(const struct hash_ipportnet4_elem *ip1,
                           const struct hash_ipportnet4_elem *ip2,
                           u32 *multi)
{
        return ip1->ip == ip2->ip &&
               ip1->ip2 == ip2->ip2 &&
               ip1->cidr == ip2->cidr &&
               ip1->port == ip2->port &&
               ip1->proto == ip2->proto;
}

static inline bool
hash_ipportnet4_data_isnull(const struct hash_ipportnet4_elem *elem)
{
        return elem->proto == 0;
}

static inline void
hash_ipportnet4_data_copy(struct hash_ipportnet4_elem *dst,
                          const struct hash_ipportnet4_elem *src)
{
        memcpy(dst, src, sizeof(*dst));
}

static inline void
hash_ipportnet4_data_flags(struct hash_ipportnet4_elem *dst, u32 flags)
{
        dst->nomatch = !!(flags & IPSET_FLAG_NOMATCH);
}

static inline void
hash_ipportnet4_data_reset_flags(struct hash_ipportnet4_elem *dst, u32 *flags)
{
        if (dst->nomatch) {
                *flags = IPSET_FLAG_NOMATCH;
                dst->nomatch = 0;
        }
}

static inline int
hash_ipportnet4_data_match(const struct hash_ipportnet4_elem *elem)
{
        return elem->nomatch ? -ENOTEMPTY : 1;
}

static inline void
hash_ipportnet4_data_netmask(struct hash_ipportnet4_elem *elem, u8 cidr)
{
        elem->ip2 &= ip_set_netmask(cidr);
        elem->cidr = cidr - 1;
}

static inline void
hash_ipportnet4_data_zero_out(struct hash_ipportnet4_elem *elem)
{
        elem->proto = 0;
}

static bool
hash_ipportnet4_data_list(struct sk_buff *skb,
                          const struct hash_ipportnet4_elem *data)
{
        u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;

        if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
            nla_put_ipaddr4(skb, IPSET_ATTR_IP2, data->ip2) ||
            nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
            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 bool
hash_ipportnet4_data_tlist(struct sk_buff *skb,
                           const struct hash_ipportnet4_elem *data)
{
        const struct hash_ipportnet4_telem *tdata =
                (const struct hash_ipportnet4_telem *)data;
        u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;

        if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, tdata->ip) ||
            nla_put_ipaddr4(skb, IPSET_ATTR_IP2, tdata->ip2) ||
            nla_put_net16(skb, IPSET_ATTR_PORT, tdata->port) ||
            nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr + 1) ||
            nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
            nla_put_net32(skb, IPSET_ATTR_TIMEOUT,
                          htonl(ip_set_timeout_get(tdata->timeout))) ||
            (flags &&
             nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
                goto nla_put_failure;
        return 0;

nla_put_failure:
        return 1;
}

#define IP_SET_HASH_WITH_PROTO
#define IP_SET_HASH_WITH_NETS

#define PF              4
#define HOST_MASK       32
#include <linux/netfilter/ipset/ip_set_ahash.h>

static inline void
hash_ipportnet4_data_next(struct ip_set_hash *h,
                          const struct hash_ipportnet4_elem *d)
{
        h->next.ip = d->ip;
        h->next.port = d->port;
        h->next.ip2 = d->ip2;
}

static int
hash_ipportnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
                     const struct xt_action_param *par,
                     enum ipset_adt adt, const struct ip_set_adt_opt *opt)
{
        const struct ip_set_hash *h = set->data;
        ipset_adtfn adtfn = set->variant->adt[adt];
        struct hash_ipportnet4_elem data = {
                .cidr = h->nets[0].cidr ? h->nets[0].cidr - 1 : HOST_MASK - 1
        };

        if (adt == IPSET_TEST)
                data.cidr = HOST_MASK - 1;

        if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
                                 &data.port, &data.proto))
                return -EINVAL;

        ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip);
        ip4addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &data.ip2);
        data.ip2 &= ip_set_netmask(data.cidr + 1);

        return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
}

static int
hash_ipportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
                     enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{
        const struct ip_set_hash *h = set->data;
        ipset_adtfn adtfn = set->variant->adt[adt];
        struct hash_ipportnet4_elem data = { .cidr = HOST_MASK - 1 };
        u32 ip, ip_to, p = 0, port, port_to;
        u32 ip2_from, ip2_to, ip2_last, ip2;
        u32 timeout = h->timeout;
        bool with_ports = false;
        u8 cidr;
        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)))
                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);
        if (ret)
                return ret;

        ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP2], &ip2_from);
        if (ret)
                return ret;

        if (tb[IPSET_ATTR_CIDR2]) {
                cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
                if (!cidr || cidr > HOST_MASK)
                        return -IPSET_ERR_INVALID_CIDR;
                data.cidr = cidr - 1;
        }

        if (tb[IPSET_ATTR_PORT])
                data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
        else
                return -IPSET_ERR_PROTOCOL;

        if (tb[IPSET_ATTR_PROTO]) {
                data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
                with_ports = ip_set_proto_with_ports(data.proto);

                if (data.proto == 0)
                        return -IPSET_ERR_INVALID_PROTO;
        } else
                return -IPSET_ERR_MISSING_PROTO;

        if (!(with_ports || data.proto == IPPROTO_ICMP))
                data.port = 0;

        if (tb[IPSET_ATTR_TIMEOUT]) {
                if (!with_timeout(h->timeout))
                        return -IPSET_ERR_TIMEOUT;
                timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
        }

        if (tb[IPSET_ATTR_CADT_FLAGS] && adt == IPSET_ADD) {
                u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
                if (cadt_flags & IPSET_FLAG_NOMATCH)
                        flags |= (cadt_flags << 16);
        }

        with_ports = with_ports && tb[IPSET_ATTR_PORT_TO];
        if (adt == IPSET_TEST ||
            !(tb[IPSET_ATTR_CIDR] || tb[IPSET_ATTR_IP_TO] || with_ports ||
              tb[IPSET_ATTR_IP2_TO])) {
                data.ip = htonl(ip);
                data.ip2 = htonl(ip2_from & ip_set_hostmask(data.cidr + 1));
                ret = adtfn(set, &data, timeout, flags);
                return 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);
        } else if (tb[IPSET_ATTR_CIDR]) {
                u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);

                if (!cidr || cidr > 32)
                        return -IPSET_ERR_INVALID_CIDR;
                ip_set_mask_from_to(ip, ip_to, cidr);
        }

        port_to = port = ntohs(data.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 (ip2_from + UINT_MAX == ip2_to)
                        return -IPSET_ERR_HASH_RANGE;
        } else {
                ip_set_mask_from_to(ip2_from, ip2_to, data.cidr + 1);
        }

        if (retried)
                ip = ntohl(h->next.ip);
        for (; !before(ip_to, ip); ip++) {
                data.ip = htonl(ip);
                p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
                                                       : port;
                for (; p <= port_to; p++) {
                        data.port = htons(p);
                        ip2 = retried
                              && ip == ntohl(h->next.ip)
                              && p == ntohs(h->next.port)
                                ? ntohl(h->next.ip2) : ip2_from;
                        while (!after(ip2, ip2_to)) {
                                data.ip2 = htonl(ip2);
                                ip2_last = ip_set_range_to_cidr(ip2, ip2_to,
                                                                &cidr);
                                data.cidr = cidr - 1;
                                ret = adtfn(set, &data, timeout, flags);

                                if (ret && !ip_set_eexist(ret, flags))
                                        return ret;
                                else
                                        ret = 0;
                                ip2 = ip2_last + 1;
                        }
                }
        }
        return ret;
}

static bool
hash_ipportnet_same_set(const struct ip_set *a, const struct ip_set *b)
{
        const struct ip_set_hash *x = a->data;
        const struct ip_set_hash *y = b->data;

        /* Resizing changes htable_bits, so we ignore it */
        return x->maxelem == y->maxelem &&
               x->timeout == y->timeout;
}

/* The type variant functions: IPv6 */

struct hash_ipportnet6_elem {
        union nf_inet_addr ip;
        union nf_inet_addr ip2;
        __be16 port;
        u8 cidr:7;
        u8 nomatch:1;
        u8 proto;
};

struct hash_ipportnet6_telem {
        union nf_inet_addr ip;
        union nf_inet_addr ip2;
        __be16 port;
        u8 cidr:7;
        u8 nomatch:1;
        u8 proto;
        unsigned long timeout;
};

static inline bool
hash_ipportnet6_data_equal(const struct hash_ipportnet6_elem *ip1,
                           const struct hash_ipportnet6_elem *ip2,
                           u32 *multi)
{
        return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
               ipv6_addr_equal(&ip1->ip2.in6, &ip2->ip2.in6) &&
               ip1->cidr == ip2->cidr &&
               ip1->port == ip2->port &&
               ip1->proto == ip2->proto;
}

static inline bool
hash_ipportnet6_data_isnull(const struct hash_ipportnet6_elem *elem)
{
        return elem->proto == 0;
}

static inline void
hash_ipportnet6_data_copy(struct hash_ipportnet6_elem *dst,
                          const struct hash_ipportnet6_elem *src)
{
        memcpy(dst, src, sizeof(*dst));
}

static inline void
hash_ipportnet6_data_flags(struct hash_ipportnet6_elem *dst, u32 flags)
{
        dst->nomatch = !!(flags & IPSET_FLAG_NOMATCH);
}

static inline void
hash_ipportnet6_data_reset_flags(struct hash_ipportnet6_elem *dst, u32 *flags)
{
        if (dst->nomatch) {
                *flags = IPSET_FLAG_NOMATCH;
                dst->nomatch = 0;
        }
}

static inline int
hash_ipportnet6_data_match(const struct hash_ipportnet6_elem *elem)
{
        return elem->nomatch ? -ENOTEMPTY : 1;
}

static inline void
hash_ipportnet6_data_zero_out(struct hash_ipportnet6_elem *elem)
{
        elem->proto = 0;
}

static inline void
ip6_netmask(union nf_inet_addr *ip, u8 prefix)
{
        ip->ip6[0] &= ip_set_netmask6(prefix)[0];
        ip->ip6[1] &= ip_set_netmask6(prefix)[1];
        ip->ip6[2] &= ip_set_netmask6(prefix)[2];
        ip->ip6[3] &= ip_set_netmask6(prefix)[3];
}

static inline void
hash_ipportnet6_data_netmask(struct hash_ipportnet6_elem *elem, u8 cidr)
{
        ip6_netmask(&elem->ip2, cidr);
        elem->cidr = cidr - 1;
}

static bool
hash_ipportnet6_data_list(struct sk_buff *skb,
                          const struct hash_ipportnet6_elem *data)
{
        u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;

        if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
            nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip2.in6) ||
            nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
            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 bool
hash_ipportnet6_data_tlist(struct sk_buff *skb,
                           const struct hash_ipportnet6_elem *data)
{
        const struct hash_ipportnet6_telem *e =
                (const struct hash_ipportnet6_telem *)data;
        u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0;

        if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &e->ip.in6) ||
            nla_put_ipaddr6(skb, IPSET_ATTR_IP2, &data->ip2.in6) ||
            nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
            nla_put_u8(skb, IPSET_ATTR_CIDR2, data->cidr + 1) ||
            nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto) ||
            nla_put_net32(skb, IPSET_ATTR_TIMEOUT,
                          htonl(ip_set_timeout_get(e->timeout))) ||
            (flags &&
             nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags))))
                goto nla_put_failure;
        return 0;

nla_put_failure:
        return 1;
}

#undef PF
#undef HOST_MASK

#define PF              6
#define HOST_MASK       128
#include <linux/netfilter/ipset/ip_set_ahash.h>

static inline void
hash_ipportnet6_data_next(struct ip_set_hash *h,
                          const struct hash_ipportnet6_elem *d)
{
        h->next.port = d->port;
}

static int
hash_ipportnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
                     const struct xt_action_param *par,
                     enum ipset_adt adt, const struct ip_set_adt_opt *opt)
{
        const struct ip_set_hash *h = set->data;
        ipset_adtfn adtfn = set->variant->adt[adt];
        struct hash_ipportnet6_elem data = {
                .cidr = h->nets[0].cidr ? h->nets[0].cidr - 1 : HOST_MASK - 1
        };

        if (adt == IPSET_TEST)
                data.cidr = HOST_MASK - 1;

        if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
                                 &data.port, &data.proto))
                return -EINVAL;

        ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
        ip6addrptr(skb, opt->flags & IPSET_DIM_THREE_SRC, &data.ip2.in6);
        ip6_netmask(&data.ip2, data.cidr + 1);

        return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
}

static int
hash_ipportnet6_uadt(struct ip_set *set, struct nlattr *tb[],
                     enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{
        const struct ip_set_hash *h = set->data;
        ipset_adtfn adtfn = set->variant->adt[adt];
        struct hash_ipportnet6_elem data = { .cidr = HOST_MASK - 1 };
        u32 port, port_to;
        u32 timeout = h->timeout;
        bool with_ports = false;
        u8 cidr;
        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) ||
                     tb[IPSET_ATTR_IP_TO] ||
                     tb[IPSET_ATTR_CIDR]))
                return -IPSET_ERR_PROTOCOL;
        if (unlikely(tb[IPSET_ATTR_IP_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], &data.ip);
        if (ret)
                return ret;

        ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP2], &data.ip2);
        if (ret)
                return ret;

        if (tb[IPSET_ATTR_CIDR2]) {
                cidr = nla_get_u8(tb[IPSET_ATTR_CIDR2]);
                if (!cidr || cidr > HOST_MASK)
                        return -IPSET_ERR_INVALID_CIDR;
                data.cidr = cidr - 1;
        }

        ip6_netmask(&data.ip2, data.cidr + 1);

        if (tb[IPSET_ATTR_PORT])
                data.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
        else
                return -IPSET_ERR_PROTOCOL;

        if (tb[IPSET_ATTR_PROTO]) {
                data.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
                with_ports = ip_set_proto_with_ports(data.proto);

                if (data.proto == 0)
                        return -IPSET_ERR_INVALID_PROTO;
        } else
                return -IPSET_ERR_MISSING_PROTO;

        if (!(with_ports || data.proto == IPPROTO_ICMPV6))
                data.port = 0;

        if (tb[IPSET_ATTR_TIMEOUT]) {
                if (!with_timeout(h->timeout))
                        return -IPSET_ERR_TIMEOUT;
                timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
        }

        if (tb[IPSET_ATTR_CADT_FLAGS] && adt == IPSET_ADD) {
                u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
                if (cadt_flags & IPSET_FLAG_NOMATCH)
                        flags |= (cadt_flags << 16);
        }

        if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
                ret = adtfn(set, &data, timeout, flags);
                return ip_set_eexist(ret, flags) ? 0 : ret;
        }

        port = ntohs(data.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++) {
                data.port = htons(port);
                ret = adtfn(set, &data, timeout, flags);

                if (ret && !ip_set_eexist(ret, flags))
                        return ret;
                else
                        ret = 0;
        }
        return ret;
}

/* Create hash:ip type of sets */

static int
hash_ipportnet_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
{
        struct ip_set_hash *h;
        u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
        u8 hbits;
        size_t hsize;

        if (!(set->family == NFPROTO_IPV4 || set->family == NFPROTO_IPV6))
                return -IPSET_ERR_INVALID_FAMILY;

        if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) ||
                     !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) ||
                     !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
                return -IPSET_ERR_PROTOCOL;

        if (tb[IPSET_ATTR_HASHSIZE]) {
                hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
                if (hashsize < IPSET_MIMINAL_HASHSIZE)
                        hashsize = IPSET_MIMINAL_HASHSIZE;
        }

        if (tb[IPSET_ATTR_MAXELEM])
                maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);

        h = kzalloc(sizeof(*h)
                    + sizeof(struct ip_set_hash_nets)
                      * (set->family == NFPROTO_IPV4 ? 32 : 128), GFP_KERNEL);
        if (!h)
                return -ENOMEM;

        h->maxelem = maxelem;
        get_random_bytes(&h->initval, sizeof(h->initval));
        h->timeout = IPSET_NO_TIMEOUT;

        hbits = htable_bits(hashsize);
        hsize = htable_size(hbits);
        if (hsize == 0) {
                kfree(h);
                return -ENOMEM;
        }
        h->table = ip_set_alloc(hsize);
        if (!h->table) {
                kfree(h);
                return -ENOMEM;
        }
        h->table->htable_bits = hbits;

        set->data = h;

        if (tb[IPSET_ATTR_TIMEOUT]) {
                h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);

                set->variant = set->family == NFPROTO_IPV4
                        ? &hash_ipportnet4_tvariant
                        : &hash_ipportnet6_tvariant;

                if (set->family == NFPROTO_IPV4)
                        hash_ipportnet4_gc_init(set);
                else
                        hash_ipportnet6_gc_init(set);
        } else {
                set->variant = set->family == NFPROTO_IPV4
                        ? &hash_ipportnet4_variant : &hash_ipportnet6_variant;
        }

        pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
                 set->name, jhash_size(h->table->htable_bits),
                 h->table->htable_bits, h->maxelem, set->data, h->table);

        return 0;
}

static struct ip_set_type hash_ipportnet_type __read_mostly = {
        .name           = "hash:ip,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   = REVISION_MIN,
        .revision_max   = REVISION_MAX,
        .create         = hash_ipportnet_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 },
        },
        .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 },
        },
        .me             = THIS_MODULE,
};

static int __init
hash_ipportnet_init(void)
{
        return ip_set_type_register(&hash_ipportnet_type);
}

static void __exit
hash_ipportnet_fini(void)
{
        ip_set_type_unregister(&hash_ipportnet_type);
}

module_init(hash_ipportnet_init);
module_exit(hash_ipportnet_fini);