1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@netfilter.org> */
4 /* Kernel module implementing an IP set type: the hash:ip,mark type */
6 #include <linux/jhash.h>
7 #include <linux/module.h>
9 #include <linux/skbuff.h>
10 #include <linux/errno.h>
11 #include <linux/random.h>
14 #include <net/netlink.h>
17 #include <linux/netfilter.h>
18 #include <linux/netfilter/ipset/pfxlen.h>
19 #include <linux/netfilter/ipset/ip_set.h>
20 #include <linux/netfilter/ipset/ip_set_hash.h>
22 #define IPSET_TYPE_REV_MIN 0
23 /* 1 Forceadd support */
24 #define IPSET_TYPE_REV_MAX 2 /* skbinfo support */
26 MODULE_LICENSE("GPL");
27 MODULE_AUTHOR("Vytas Dauksa <vytas.dauksa@smoothwall.net>");
28 IP_SET_MODULE_DESC("hash:ip,mark", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
29 MODULE_ALIAS("ip_set_hash:ip,mark");
31 /* Type specific function prefix */
32 #define HTYPE hash_ipmark
33 #define IP_SET_HASH_WITH_MARKMASK
38 struct hash_ipmark4_elem {
43 /* Common functions */
46 hash_ipmark4_data_equal(const struct hash_ipmark4_elem *ip1,
47 const struct hash_ipmark4_elem *ip2,
50 return ip1->ip == ip2->ip &&
51 ip1->mark == ip2->mark;
55 hash_ipmark4_data_list(struct sk_buff *skb,
56 const struct hash_ipmark4_elem *data)
58 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
59 nla_put_net32(skb, IPSET_ATTR_MARK, htonl(data->mark)))
68 hash_ipmark4_data_next(struct hash_ipmark4_elem *next,
69 const struct hash_ipmark4_elem *d)
74 #define MTYPE hash_ipmark4
76 #include "ip_set_hash_gen.h"
79 hash_ipmark4_kadt(struct ip_set *set, const struct sk_buff *skb,
80 const struct xt_action_param *par,
81 enum ipset_adt adt, struct ip_set_adt_opt *opt)
83 const struct hash_ipmark4 *h = set->data;
84 ipset_adtfn adtfn = set->variant->adt[adt];
85 struct hash_ipmark4_elem e = { };
86 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
89 e.mark &= h->markmask;
91 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
92 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
96 hash_ipmark4_uadt(struct ip_set *set, struct nlattr *tb[],
97 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
99 const struct hash_ipmark4 *h = set->data;
100 ipset_adtfn adtfn = set->variant->adt[adt];
101 struct hash_ipmark4_elem e = { };
102 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
106 if (tb[IPSET_ATTR_LINENO])
107 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
109 if (unlikely(!tb[IPSET_ATTR_IP] ||
110 !ip_set_attr_netorder(tb, IPSET_ATTR_MARK)))
111 return -IPSET_ERR_PROTOCOL;
113 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip);
117 ret = ip_set_get_extensions(set, tb, &ext);
121 e.mark = ntohl(nla_get_be32(tb[IPSET_ATTR_MARK]));
122 e.mark &= h->markmask;
124 if (adt == IPSET_TEST ||
125 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR])) {
126 ret = adtfn(set, &e, &ext, &ext, flags);
127 return ip_set_eexist(ret, flags) ? 0 : ret;
130 ip_to = ip = ntohl(e.ip);
131 if (tb[IPSET_ATTR_IP_TO]) {
132 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
137 } else if (tb[IPSET_ATTR_CIDR]) {
138 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
140 if (!cidr || cidr > HOST_MASK)
141 return -IPSET_ERR_INVALID_CIDR;
142 ip_set_mask_from_to(ip, ip_to, cidr);
146 ip = ntohl(h->next.ip);
147 for (; ip <= ip_to; ip++) {
149 ret = adtfn(set, &e, &ext, &ext, flags);
151 if (ret && !ip_set_eexist(ret, flags))
161 struct hash_ipmark6_elem {
162 union nf_inet_addr ip;
166 /* Common functions */
169 hash_ipmark6_data_equal(const struct hash_ipmark6_elem *ip1,
170 const struct hash_ipmark6_elem *ip2,
173 return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
174 ip1->mark == ip2->mark;
178 hash_ipmark6_data_list(struct sk_buff *skb,
179 const struct hash_ipmark6_elem *data)
181 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
182 nla_put_net32(skb, IPSET_ATTR_MARK, htonl(data->mark)))
183 goto nla_put_failure;
191 hash_ipmark6_data_next(struct hash_ipmark6_elem *next,
192 const struct hash_ipmark6_elem *d)
199 #define MTYPE hash_ipmark6
200 #define HOST_MASK 128
201 #define IP_SET_EMIT_CREATE
202 #include "ip_set_hash_gen.h"
205 hash_ipmark6_kadt(struct ip_set *set, const struct sk_buff *skb,
206 const struct xt_action_param *par,
207 enum ipset_adt adt, struct ip_set_adt_opt *opt)
209 const struct hash_ipmark6 *h = set->data;
210 ipset_adtfn adtfn = set->variant->adt[adt];
211 struct hash_ipmark6_elem e = { };
212 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
215 e.mark &= h->markmask;
217 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
218 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
222 hash_ipmark6_uadt(struct ip_set *set, struct nlattr *tb[],
223 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
225 const struct hash_ipmark6 *h = set->data;
226 ipset_adtfn adtfn = set->variant->adt[adt];
227 struct hash_ipmark6_elem e = { };
228 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
231 if (tb[IPSET_ATTR_LINENO])
232 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
234 if (unlikely(!tb[IPSET_ATTR_IP] ||
235 !ip_set_attr_netorder(tb, IPSET_ATTR_MARK)))
236 return -IPSET_ERR_PROTOCOL;
237 if (unlikely(tb[IPSET_ATTR_IP_TO]))
238 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
239 if (unlikely(tb[IPSET_ATTR_CIDR])) {
240 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
242 if (cidr != HOST_MASK)
243 return -IPSET_ERR_INVALID_CIDR;
246 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip);
250 ret = ip_set_get_extensions(set, tb, &ext);
254 e.mark = ntohl(nla_get_be32(tb[IPSET_ATTR_MARK]));
255 e.mark &= h->markmask;
257 if (adt == IPSET_TEST) {
258 ret = adtfn(set, &e, &ext, &ext, flags);
259 return ip_set_eexist(ret, flags) ? 0 : ret;
262 ret = adtfn(set, &e, &ext, &ext, flags);
263 if (ret && !ip_set_eexist(ret, flags))
269 static struct ip_set_type hash_ipmark_type __read_mostly = {
270 .name = "hash:ip,mark",
271 .protocol = IPSET_PROTOCOL,
272 .features = IPSET_TYPE_IP | IPSET_TYPE_MARK,
273 .dimension = IPSET_DIM_TWO,
274 .family = NFPROTO_UNSPEC,
275 .revision_min = IPSET_TYPE_REV_MIN,
276 .revision_max = IPSET_TYPE_REV_MAX,
277 .create = hash_ipmark_create,
279 [IPSET_ATTR_MARKMASK] = { .type = NLA_U32 },
280 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
281 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
282 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
283 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
284 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
285 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
288 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
289 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
290 [IPSET_ATTR_MARK] = { .type = NLA_U32 },
291 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
292 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
293 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
294 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
295 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
296 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING,
297 .len = IPSET_MAX_COMMENT_SIZE },
298 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
299 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
300 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
306 hash_ipmark_init(void)
308 return ip_set_type_register(&hash_ipmark_type);
312 hash_ipmark_fini(void)
315 ip_set_type_unregister(&hash_ipmark_type);
318 module_init(hash_ipmark_init);
319 module_exit(hash_ipmark_fini);