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- // SPDX-License-Identifier: GPL-2.0-only
- /* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@netfilter.org> */
- /* Kernel module implementing an IP set type: the hash:ip,mark 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_hash.h>
- #define IPSET_TYPE_REV_MIN 0
- /* 1 Forceadd support */
- #define IPSET_TYPE_REV_MAX 2 /* skbinfo support */
- MODULE_LICENSE("GPL");
- MODULE_AUTHOR("Vytas Dauksa <vytas.dauksa@smoothwall.net>");
- IP_SET_MODULE_DESC("hash:ip,mark", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
- MODULE_ALIAS("ip_set_hash:ip,mark");
- /* Type specific function prefix */
- #define HTYPE hash_ipmark
- #define IP_SET_HASH_WITH_MARKMASK
- /* IPv4 variant */
- /* Member elements */
- struct hash_ipmark4_elem {
- __be32 ip;
- __u32 mark;
- };
- /* Common functions */
- static bool
- hash_ipmark4_data_equal(const struct hash_ipmark4_elem *ip1,
- const struct hash_ipmark4_elem *ip2,
- u32 *multi)
- {
- return ip1->ip == ip2->ip &&
- ip1->mark == ip2->mark;
- }
- static bool
- hash_ipmark4_data_list(struct sk_buff *skb,
- const struct hash_ipmark4_elem *data)
- {
- if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
- nla_put_net32(skb, IPSET_ATTR_MARK, htonl(data->mark)))
- goto nla_put_failure;
- return false;
- nla_put_failure:
- return true;
- }
- static void
- hash_ipmark4_data_next(struct hash_ipmark4_elem *next,
- const struct hash_ipmark4_elem *d)
- {
- next->ip = d->ip;
- }
- #define MTYPE hash_ipmark4
- #define HOST_MASK 32
- #include "ip_set_hash_gen.h"
- static int
- hash_ipmark4_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_ipmark4 *h = set->data;
- ipset_adtfn adtfn = set->variant->adt[adt];
- struct hash_ipmark4_elem e = { };
- struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
- e.mark = skb->mark;
- e.mark &= h->markmask;
- ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
- return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
- }
- static int
- hash_ipmark4_uadt(struct ip_set *set, struct nlattr *tb[],
- enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
- {
- const struct hash_ipmark4 *h = set->data;
- ipset_adtfn adtfn = set->variant->adt[adt];
- struct hash_ipmark4_elem e = { };
- struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
- u32 ip, ip_to = 0;
- int ret;
- if (tb[IPSET_ATTR_LINENO])
- *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
- if (unlikely(!tb[IPSET_ATTR_IP] ||
- !ip_set_attr_netorder(tb, IPSET_ATTR_MARK)))
- return -IPSET_ERR_PROTOCOL;
- ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip);
- if (ret)
- return ret;
- ret = ip_set_get_extensions(set, tb, &ext);
- if (ret)
- return ret;
- e.mark = ntohl(nla_get_be32(tb[IPSET_ATTR_MARK]));
- e.mark &= h->markmask;
- if (adt == IPSET_TEST ||
- !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR])) {
- ret = adtfn(set, &e, &ext, &ext, flags);
- return ip_set_eexist(ret, flags) ? 0 : ret;
- }
- ip_to = ip = ntohl(e.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 > HOST_MASK)
- return -IPSET_ERR_INVALID_CIDR;
- ip_set_mask_from_to(ip, ip_to, cidr);
- }
- if (retried)
- ip = ntohl(h->next.ip);
- for (; ip <= ip_to; ip++) {
- e.ip = htonl(ip);
- ret = adtfn(set, &e, &ext, &ext, flags);
- if (ret && !ip_set_eexist(ret, flags))
- return ret;
- ret = 0;
- }
- return ret;
- }
- /* IPv6 variant */
- struct hash_ipmark6_elem {
- union nf_inet_addr ip;
- __u32 mark;
- };
- /* Common functions */
- static bool
- hash_ipmark6_data_equal(const struct hash_ipmark6_elem *ip1,
- const struct hash_ipmark6_elem *ip2,
- u32 *multi)
- {
- return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
- ip1->mark == ip2->mark;
- }
- static bool
- hash_ipmark6_data_list(struct sk_buff *skb,
- const struct hash_ipmark6_elem *data)
- {
- if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
- nla_put_net32(skb, IPSET_ATTR_MARK, htonl(data->mark)))
- goto nla_put_failure;
- return false;
- nla_put_failure:
- return true;
- }
- static void
- hash_ipmark6_data_next(struct hash_ipmark6_elem *next,
- const struct hash_ipmark6_elem *d)
- {
- }
- #undef MTYPE
- #undef HOST_MASK
- #define MTYPE hash_ipmark6
- #define HOST_MASK 128
- #define IP_SET_EMIT_CREATE
- #include "ip_set_hash_gen.h"
- static int
- hash_ipmark6_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_ipmark6 *h = set->data;
- ipset_adtfn adtfn = set->variant->adt[adt];
- struct hash_ipmark6_elem e = { };
- struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
- e.mark = skb->mark;
- e.mark &= h->markmask;
- ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
- return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
- }
- static int
- hash_ipmark6_uadt(struct ip_set *set, struct nlattr *tb[],
- enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
- {
- const struct hash_ipmark6 *h = set->data;
- ipset_adtfn adtfn = set->variant->adt[adt];
- struct hash_ipmark6_elem e = { };
- 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] ||
- !ip_set_attr_netorder(tb, IPSET_ATTR_MARK)))
- 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;
- e.mark = ntohl(nla_get_be32(tb[IPSET_ATTR_MARK]));
- e.mark &= h->markmask;
- if (adt == IPSET_TEST) {
- ret = adtfn(set, &e, &ext, &ext, flags);
- return ip_set_eexist(ret, flags) ? 0 : ret;
- }
- ret = adtfn(set, &e, &ext, &ext, flags);
- if (ret && !ip_set_eexist(ret, flags))
- return ret;
- return 0;
- }
- static struct ip_set_type hash_ipmark_type __read_mostly = {
- .name = "hash:ip,mark",
- .protocol = IPSET_PROTOCOL,
- .features = IPSET_TYPE_IP | IPSET_TYPE_MARK,
- .dimension = IPSET_DIM_TWO,
- .family = NFPROTO_UNSPEC,
- .revision_min = IPSET_TYPE_REV_MIN,
- .revision_max = IPSET_TYPE_REV_MAX,
- .create = hash_ipmark_create,
- .create_policy = {
- [IPSET_ATTR_MARKMASK] = { .type = NLA_U32 },
- [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_MARK] = { .type = NLA_U32 },
- [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_ipmark_init(void)
- {
- return ip_set_type_register(&hash_ipmark_type);
- }
- static void __exit
- hash_ipmark_fini(void)
- {
- rcu_barrier();
- ip_set_type_unregister(&hash_ipmark_type);
- }
- module_init(hash_ipmark_init);
- module_exit(hash_ipmark_fini);
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