1 /* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
2 * Copyright (C) 2013 Smoothwall Ltd. <vytas.dauksa@smoothwall.net>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
9 /* Kernel module implementing an IP set type: the hash:ip,mark type */
11 #include <linux/jhash.h>
12 #include <linux/module.h>
14 #include <linux/skbuff.h>
15 #include <linux/errno.h>
16 #include <linux/random.h>
19 #include <net/netlink.h>
22 #include <linux/netfilter.h>
23 #include <linux/netfilter/ipset/pfxlen.h>
24 #include <linux/netfilter/ipset/ip_set.h>
25 #include <linux/netfilter/ipset/ip_set_hash.h>
27 #define IPSET_TYPE_REV_MIN 0
28 #define IPSET_TYPE_REV_MAX 1 /* Forceadd support */
30 MODULE_LICENSE("GPL");
31 MODULE_AUTHOR("Vytas Dauksa <vytas.dauksa@smoothwall.net>");
32 IP_SET_MODULE_DESC("hash:ip,mark", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
33 MODULE_ALIAS("ip_set_hash:ip,mark");
35 /* Type specific function prefix */
36 #define HTYPE hash_ipmark
37 #define IP_SET_HASH_WITH_MARKMASK
42 struct hash_ipmark4_elem {
47 /* Common functions */
50 hash_ipmark4_data_equal(const struct hash_ipmark4_elem *ip1,
51 const struct hash_ipmark4_elem *ip2,
54 return ip1->ip == ip2->ip &&
55 ip1->mark == ip2->mark;
59 hash_ipmark4_data_list(struct sk_buff *skb,
60 const struct hash_ipmark4_elem *data)
62 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
63 nla_put_net32(skb, IPSET_ATTR_MARK, htonl(data->mark)))
72 hash_ipmark4_data_next(struct hash_ipmark4_elem *next,
73 const struct hash_ipmark4_elem *d)
78 #define MTYPE hash_ipmark4
81 #define HKEY_DATALEN sizeof(struct hash_ipmark4_elem)
82 #include "ip_set_hash_gen.h"
85 hash_ipmark4_kadt(struct ip_set *set, const struct sk_buff *skb,
86 const struct xt_action_param *par,
87 enum ipset_adt adt, struct ip_set_adt_opt *opt)
89 const struct hash_ipmark *h = set->data;
90 ipset_adtfn adtfn = set->variant->adt[adt];
91 struct hash_ipmark4_elem e = { };
92 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
95 e.mark &= h->markmask;
97 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
98 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
102 hash_ipmark4_uadt(struct ip_set *set, struct nlattr *tb[],
103 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
105 const struct hash_ipmark *h = set->data;
106 ipset_adtfn adtfn = set->variant->adt[adt];
107 struct hash_ipmark4_elem e = { };
108 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
112 if (unlikely(!tb[IPSET_ATTR_IP] ||
113 !ip_set_attr_netorder(tb, IPSET_ATTR_MARK) ||
114 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
115 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
116 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES)))
117 return -IPSET_ERR_PROTOCOL;
119 if (tb[IPSET_ATTR_LINENO])
120 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
122 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip) ||
123 ip_set_get_extensions(set, tb, &ext);
127 e.mark = ntohl(nla_get_u32(tb[IPSET_ATTR_MARK]));
128 e.mark &= h->markmask;
130 if (adt == IPSET_TEST ||
131 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR])) {
132 ret = adtfn(set, &e, &ext, &ext, flags);
133 return ip_set_eexist(ret, flags) ? 0 : ret;
136 ip_to = ip = ntohl(e.ip);
137 if (tb[IPSET_ATTR_IP_TO]) {
138 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
143 } else if (tb[IPSET_ATTR_CIDR]) {
144 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
146 if (!cidr || cidr > 32)
147 return -IPSET_ERR_INVALID_CIDR;
148 ip_set_mask_from_to(ip, ip_to, cidr);
152 ip = ntohl(h->next.ip);
153 for (; !before(ip_to, ip); ip++) {
155 ret = adtfn(set, &e, &ext, &ext, flags);
157 if (ret && !ip_set_eexist(ret, flags))
167 struct hash_ipmark6_elem {
168 union nf_inet_addr ip;
172 /* Common functions */
175 hash_ipmark6_data_equal(const struct hash_ipmark6_elem *ip1,
176 const struct hash_ipmark6_elem *ip2,
179 return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
180 ip1->mark == ip2->mark;
184 hash_ipmark6_data_list(struct sk_buff *skb,
185 const struct hash_ipmark6_elem *data)
187 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
188 nla_put_net32(skb, IPSET_ATTR_MARK, htonl(data->mark)))
189 goto nla_put_failure;
197 hash_ipmark6_data_next(struct hash_ipmark4_elem *next,
198 const struct hash_ipmark6_elem *d)
207 #define MTYPE hash_ipmark6
209 #define HOST_MASK 128
210 #define HKEY_DATALEN sizeof(struct hash_ipmark6_elem)
211 #define IP_SET_EMIT_CREATE
212 #include "ip_set_hash_gen.h"
216 hash_ipmark6_kadt(struct ip_set *set, const struct sk_buff *skb,
217 const struct xt_action_param *par,
218 enum ipset_adt adt, struct ip_set_adt_opt *opt)
220 const struct hash_ipmark *h = set->data;
221 ipset_adtfn adtfn = set->variant->adt[adt];
222 struct hash_ipmark6_elem e = { };
223 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
226 e.mark &= h->markmask;
228 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
229 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
233 hash_ipmark6_uadt(struct ip_set *set, struct nlattr *tb[],
234 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
236 const struct hash_ipmark *h = set->data;
237 ipset_adtfn adtfn = set->variant->adt[adt];
238 struct hash_ipmark6_elem e = { };
239 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
242 if (unlikely(!tb[IPSET_ATTR_IP] ||
243 !ip_set_attr_netorder(tb, IPSET_ATTR_MARK) ||
244 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
245 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
246 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
247 tb[IPSET_ATTR_IP_TO] ||
248 tb[IPSET_ATTR_CIDR]))
249 return -IPSET_ERR_PROTOCOL;
251 if (tb[IPSET_ATTR_LINENO])
252 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
254 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip) ||
255 ip_set_get_extensions(set, tb, &ext);
259 e.mark = ntohl(nla_get_u32(tb[IPSET_ATTR_MARK]));
260 e.mark &= h->markmask;
262 if (adt == IPSET_TEST) {
263 ret = adtfn(set, &e, &ext, &ext, flags);
264 return ip_set_eexist(ret, flags) ? 0 : ret;
267 ret = adtfn(set, &e, &ext, &ext, flags);
268 if (ret && !ip_set_eexist(ret, flags))
276 static struct ip_set_type hash_ipmark_type __read_mostly = {
277 .name = "hash:ip,mark",
278 .protocol = IPSET_PROTOCOL,
279 .features = IPSET_TYPE_IP | IPSET_TYPE_MARK,
280 .dimension = IPSET_DIM_TWO,
281 .family = NFPROTO_UNSPEC,
282 .revision_min = IPSET_TYPE_REV_MIN,
283 .revision_max = IPSET_TYPE_REV_MAX,
284 .create = hash_ipmark_create,
286 [IPSET_ATTR_MARKMASK] = { .type = NLA_U32 },
287 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
288 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
289 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
290 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
291 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
292 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
295 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
296 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
297 [IPSET_ATTR_MARK] = { .type = NLA_U32 },
298 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
299 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
300 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
301 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
302 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
303 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING },
309 hash_ipmark_init(void)
311 return ip_set_type_register(&hash_ipmark_type);
315 hash_ipmark_fini(void)
317 ip_set_type_unregister(&hash_ipmark_type);
320 module_init(hash_ipmark_init);
321 module_exit(hash_ipmark_fini);