1
2
3
4
5
6
7
8
9
10
11#include <linux/jhash.h>
12#include <linux/module.h>
13#include <linux/ip.h>
14#include <linux/skbuff.h>
15#include <linux/errno.h>
16#include <linux/random.h>
17#include <net/ip.h>
18#include <net/ipv6.h>
19#include <net/netlink.h>
20#include <net/tcp.h>
21
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>
26
27#define IPSET_TYPE_REV_MIN 0
28
29#define IPSET_TYPE_REV_MAX 2
30
31MODULE_LICENSE("GPL");
32MODULE_AUTHOR("Vytas Dauksa <vytas.dauksa@smoothwall.net>");
33IP_SET_MODULE_DESC("hash:ip,mark", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
34MODULE_ALIAS("ip_set_hash:ip,mark");
35
36
37#define HTYPE hash_ipmark
38#define IP_SET_HASH_WITH_MARKMASK
39
40
41
42
43struct hash_ipmark4_elem {
44 __be32 ip;
45 __u32 mark;
46};
47
48
49
50static inline bool
51hash_ipmark4_data_equal(const struct hash_ipmark4_elem *ip1,
52 const struct hash_ipmark4_elem *ip2,
53 u32 *multi)
54{
55 return ip1->ip == ip2->ip &&
56 ip1->mark == ip2->mark;
57}
58
59static bool
60hash_ipmark4_data_list(struct sk_buff *skb,
61 const struct hash_ipmark4_elem *data)
62{
63 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
64 nla_put_net32(skb, IPSET_ATTR_MARK, htonl(data->mark)))
65 goto nla_put_failure;
66 return false;
67
68nla_put_failure:
69 return true;
70}
71
72static inline void
73hash_ipmark4_data_next(struct hash_ipmark4_elem *next,
74 const struct hash_ipmark4_elem *d)
75{
76 next->ip = d->ip;
77}
78
79#define MTYPE hash_ipmark4
80#define HOST_MASK 32
81#include "ip_set_hash_gen.h"
82
83static int
84hash_ipmark4_kadt(struct ip_set *set, const struct sk_buff *skb,
85 const struct xt_action_param *par,
86 enum ipset_adt adt, struct ip_set_adt_opt *opt)
87{
88 const struct hash_ipmark4 *h = set->data;
89 ipset_adtfn adtfn = set->variant->adt[adt];
90 struct hash_ipmark4_elem e = { };
91 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
92
93 e.mark = skb->mark;
94 e.mark &= h->markmask;
95
96 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
97 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
98}
99
100static int
101hash_ipmark4_uadt(struct ip_set *set, struct nlattr *tb[],
102 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
103{
104 const struct hash_ipmark4 *h = set->data;
105 ipset_adtfn adtfn = set->variant->adt[adt];
106 struct hash_ipmark4_elem e = { };
107 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
108 u32 ip, ip_to = 0;
109 int ret;
110
111 if (tb[IPSET_ATTR_LINENO])
112 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
113
114 if (unlikely(!tb[IPSET_ATTR_IP] ||
115 !ip_set_attr_netorder(tb, IPSET_ATTR_MARK)))
116 return -IPSET_ERR_PROTOCOL;
117
118 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip);
119 if (ret)
120 return ret;
121
122 ret = ip_set_get_extensions(set, tb, &ext);
123 if (ret)
124 return ret;
125
126 e.mark = ntohl(nla_get_be32(tb[IPSET_ATTR_MARK]));
127 e.mark &= h->markmask;
128
129 if (adt == IPSET_TEST ||
130 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR])) {
131 ret = adtfn(set, &e, &ext, &ext, flags);
132 return ip_set_eexist(ret, flags) ? 0 : ret;
133 }
134
135 ip_to = ip = ntohl(e.ip);
136 if (tb[IPSET_ATTR_IP_TO]) {
137 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
138 if (ret)
139 return ret;
140 if (ip > ip_to)
141 swap(ip, ip_to);
142 } else if (tb[IPSET_ATTR_CIDR]) {
143 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
144
145 if (!cidr || cidr > HOST_MASK)
146 return -IPSET_ERR_INVALID_CIDR;
147 ip_set_mask_from_to(ip, ip_to, cidr);
148 }
149
150 if (retried)
151 ip = ntohl(h->next.ip);
152 for (; !before(ip_to, ip); ip++) {
153 e.ip = htonl(ip);
154 ret = adtfn(set, &e, &ext, &ext, flags);
155
156 if (ret && !ip_set_eexist(ret, flags))
157 return ret;
158
159 ret = 0;
160 }
161 return ret;
162}
163
164
165
166struct hash_ipmark6_elem {
167 union nf_inet_addr ip;
168 __u32 mark;
169};
170
171
172
173static inline bool
174hash_ipmark6_data_equal(const struct hash_ipmark6_elem *ip1,
175 const struct hash_ipmark6_elem *ip2,
176 u32 *multi)
177{
178 return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
179 ip1->mark == ip2->mark;
180}
181
182static bool
183hash_ipmark6_data_list(struct sk_buff *skb,
184 const struct hash_ipmark6_elem *data)
185{
186 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
187 nla_put_net32(skb, IPSET_ATTR_MARK, htonl(data->mark)))
188 goto nla_put_failure;
189 return false;
190
191nla_put_failure:
192 return true;
193}
194
195static inline void
196hash_ipmark6_data_next(struct hash_ipmark6_elem *next,
197 const struct hash_ipmark6_elem *d)
198{
199}
200
201#undef MTYPE
202#undef HOST_MASK
203
204#define MTYPE hash_ipmark6
205#define HOST_MASK 128
206#define IP_SET_EMIT_CREATE
207#include "ip_set_hash_gen.h"
208
209static int
210hash_ipmark6_kadt(struct ip_set *set, const struct sk_buff *skb,
211 const struct xt_action_param *par,
212 enum ipset_adt adt, struct ip_set_adt_opt *opt)
213{
214 const struct hash_ipmark6 *h = set->data;
215 ipset_adtfn adtfn = set->variant->adt[adt];
216 struct hash_ipmark6_elem e = { };
217 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
218
219 e.mark = skb->mark;
220 e.mark &= h->markmask;
221
222 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
223 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
224}
225
226static int
227hash_ipmark6_uadt(struct ip_set *set, struct nlattr *tb[],
228 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
229{
230 const struct hash_ipmark6 *h = set->data;
231 ipset_adtfn adtfn = set->variant->adt[adt];
232 struct hash_ipmark6_elem e = { };
233 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
234 int ret;
235
236 if (tb[IPSET_ATTR_LINENO])
237 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
238
239 if (unlikely(!tb[IPSET_ATTR_IP] ||
240 !ip_set_attr_netorder(tb, IPSET_ATTR_MARK)))
241 return -IPSET_ERR_PROTOCOL;
242 if (unlikely(tb[IPSET_ATTR_IP_TO]))
243 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
244 if (unlikely(tb[IPSET_ATTR_CIDR])) {
245 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
246
247 if (cidr != HOST_MASK)
248 return -IPSET_ERR_INVALID_CIDR;
249 }
250
251 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip);
252 if (ret)
253 return ret;
254
255 ret = ip_set_get_extensions(set, tb, &ext);
256 if (ret)
257 return ret;
258
259 e.mark = ntohl(nla_get_be32(tb[IPSET_ATTR_MARK]));
260 e.mark &= h->markmask;
261
262 if (adt == IPSET_TEST) {
263 ret = adtfn(set, &e, &ext, &ext, flags);
264 return ip_set_eexist(ret, flags) ? 0 : ret;
265 }
266
267 ret = adtfn(set, &e, &ext, &ext, flags);
268 if (ret && !ip_set_eexist(ret, flags))
269 return ret;
270
271 return 0;
272}
273
274static struct ip_set_type hash_ipmark_type __read_mostly = {
275 .name = "hash:ip,mark",
276 .protocol = IPSET_PROTOCOL,
277 .features = IPSET_TYPE_IP | IPSET_TYPE_MARK,
278 .dimension = IPSET_DIM_TWO,
279 .family = NFPROTO_UNSPEC,
280 .revision_min = IPSET_TYPE_REV_MIN,
281 .revision_max = IPSET_TYPE_REV_MAX,
282 .create = hash_ipmark_create,
283 .create_policy = {
284 [IPSET_ATTR_MARKMASK] = { .type = NLA_U32 },
285 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
286 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
287 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
288 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
289 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
290 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
291 },
292 .adt_policy = {
293 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
294 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
295 [IPSET_ATTR_MARK] = { .type = NLA_U32 },
296 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
297 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
298 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
299 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
300 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
301 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING,
302 .len = IPSET_MAX_COMMENT_SIZE },
303 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
304 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
305 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
306 },
307 .me = THIS_MODULE,
308};
309
310static int __init
311hash_ipmark_init(void)
312{
313 return ip_set_type_register(&hash_ipmark_type);
314}
315
316static void __exit
317hash_ipmark_fini(void)
318{
319 rcu_barrier();
320 ip_set_type_unregister(&hash_ipmark_type);
321}
322
323module_init(hash_ipmark_init);
324module_exit(hash_ipmark_fini);
325
