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7#include <linux/jhash.h>
8#include <linux/module.h>
9#include <linux/ip.h>
10#include <linux/etherdevice.h>
11#include <linux/skbuff.h>
12#include <linux/errno.h>
13#include <linux/random.h>
14#include <linux/if_ether.h>
15#include <net/ip.h>
16#include <net/ipv6.h>
17#include <net/netlink.h>
18#include <net/tcp.h>
19
20#include <linux/netfilter.h>
21#include <linux/netfilter/ipset/pfxlen.h>
22#include <linux/netfilter/ipset/ip_set.h>
23#include <linux/netfilter/ipset/ip_set_hash.h>
24
25#define IPSET_TYPE_REV_MIN 0
26#define IPSET_TYPE_REV_MAX 1
27
28MODULE_LICENSE("GPL");
29MODULE_AUTHOR("Tomasz Chilinski <tomasz.chilinski@chilan.com>");
30IP_SET_MODULE_DESC("hash:ip,mac", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
31MODULE_ALIAS("ip_set_hash:ip,mac");
32
33
34#define HTYPE hash_ipmac
35
36
37
38
39struct hash_ipmac4_elem {
40
41 __be32 ip;
42 union {
43 unsigned char ether[ETH_ALEN];
44 __be32 foo[2];
45 };
46};
47
48
49
50static bool
51hash_ipmac4_data_equal(const struct hash_ipmac4_elem *e1,
52 const struct hash_ipmac4_elem *e2,
53 u32 *multi)
54{
55 return e1->ip == e2->ip && ether_addr_equal(e1->ether, e2->ether);
56}
57
58static bool
59hash_ipmac4_data_list(struct sk_buff *skb, const struct hash_ipmac4_elem *e)
60{
61 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, e->ip) ||
62 nla_put(skb, IPSET_ATTR_ETHER, ETH_ALEN, e->ether))
63 goto nla_put_failure;
64 return false;
65
66nla_put_failure:
67 return true;
68}
69
70static void
71hash_ipmac4_data_next(struct hash_ipmac4_elem *next,
72 const struct hash_ipmac4_elem *e)
73{
74 next->ip = e->ip;
75}
76
77#define MTYPE hash_ipmac4
78#define PF 4
79#define HOST_MASK 32
80#define HKEY_DATALEN sizeof(struct hash_ipmac4_elem)
81#include "ip_set_hash_gen.h"
82
83static int
84hash_ipmac4_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 ipset_adtfn adtfn = set->variant->adt[adt];
89 struct hash_ipmac4_elem e = { .ip = 0, { .foo[0] = 0, .foo[1] = 0 } };
90 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
91
92 if (skb_mac_header(skb) < skb->head ||
93 (skb_mac_header(skb) + ETH_HLEN) > skb->data)
94 return -EINVAL;
95
96 if (opt->flags & IPSET_DIM_TWO_SRC)
97 ether_addr_copy(e.ether, eth_hdr(skb)->h_source);
98 else
99 ether_addr_copy(e.ether, eth_hdr(skb)->h_dest);
100
101 if (is_zero_ether_addr(e.ether))
102 return -EINVAL;
103
104 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
105
106 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
107}
108
109static int
110hash_ipmac4_uadt(struct ip_set *set, struct nlattr *tb[],
111 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
112{
113 ipset_adtfn adtfn = set->variant->adt[adt];
114 struct hash_ipmac4_elem e = { .ip = 0, { .foo[0] = 0, .foo[1] = 0 } };
115 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
116 int ret;
117
118 if (unlikely(!tb[IPSET_ATTR_IP] ||
119 !tb[IPSET_ATTR_ETHER] ||
120 nla_len(tb[IPSET_ATTR_ETHER]) != ETH_ALEN ||
121 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
122 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
123 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
124 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBMARK) ||
125 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBPRIO) ||
126 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBQUEUE)))
127 return -IPSET_ERR_PROTOCOL;
128
129 if (tb[IPSET_ATTR_LINENO])
130 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
131
132 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip) ||
133 ip_set_get_extensions(set, tb, &ext);
134 if (ret)
135 return ret;
136 memcpy(e.ether, nla_data(tb[IPSET_ATTR_ETHER]), ETH_ALEN);
137 if (is_zero_ether_addr(e.ether))
138 return -IPSET_ERR_HASH_ELEM;
139
140 return adtfn(set, &e, &ext, &ext, flags);
141}
142
143
144
145
146struct hash_ipmac6_elem {
147
148 union nf_inet_addr ip;
149 union {
150 unsigned char ether[ETH_ALEN];
151 __be32 foo[2];
152 };
153};
154
155
156
157static bool
158hash_ipmac6_data_equal(const struct hash_ipmac6_elem *e1,
159 const struct hash_ipmac6_elem *e2,
160 u32 *multi)
161{
162 return ipv6_addr_equal(&e1->ip.in6, &e2->ip.in6) &&
163 ether_addr_equal(e1->ether, e2->ether);
164}
165
166static bool
167hash_ipmac6_data_list(struct sk_buff *skb, const struct hash_ipmac6_elem *e)
168{
169 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &e->ip.in6) ||
170 nla_put(skb, IPSET_ATTR_ETHER, ETH_ALEN, e->ether))
171 goto nla_put_failure;
172 return false;
173
174nla_put_failure:
175 return true;
176}
177
178static void
179hash_ipmac6_data_next(struct hash_ipmac6_elem *next,
180 const struct hash_ipmac6_elem *e)
181{
182}
183
184#undef MTYPE
185#undef PF
186#undef HOST_MASK
187#undef HKEY_DATALEN
188
189#define MTYPE hash_ipmac6
190#define PF 6
191#define HOST_MASK 128
192#define HKEY_DATALEN sizeof(struct hash_ipmac6_elem)
193#define IP_SET_EMIT_CREATE
194#include "ip_set_hash_gen.h"
195
196static int
197hash_ipmac6_kadt(struct ip_set *set, const struct sk_buff *skb,
198 const struct xt_action_param *par,
199 enum ipset_adt adt, struct ip_set_adt_opt *opt)
200{
201 ipset_adtfn adtfn = set->variant->adt[adt];
202 struct hash_ipmac6_elem e = {
203 { .all = { 0 } },
204 { .foo[0] = 0, .foo[1] = 0 }
205 };
206 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
207
208 if (skb_mac_header(skb) < skb->head ||
209 (skb_mac_header(skb) + ETH_HLEN) > skb->data)
210 return -EINVAL;
211
212 if (opt->flags & IPSET_DIM_TWO_SRC)
213 ether_addr_copy(e.ether, eth_hdr(skb)->h_source);
214 else
215 ether_addr_copy(e.ether, eth_hdr(skb)->h_dest);
216
217 if (is_zero_ether_addr(e.ether))
218 return -EINVAL;
219
220 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
221
222 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
223}
224
225static int
226hash_ipmac6_uadt(struct ip_set *set, struct nlattr *tb[],
227 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
228{
229 ipset_adtfn adtfn = set->variant->adt[adt];
230 struct hash_ipmac6_elem e = {
231 { .all = { 0 } },
232 { .foo[0] = 0, .foo[1] = 0 }
233 };
234 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
235 int ret;
236
237 if (unlikely(!tb[IPSET_ATTR_IP] ||
238 !tb[IPSET_ATTR_ETHER] ||
239 nla_len(tb[IPSET_ATTR_ETHER]) != ETH_ALEN ||
240 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
241 !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
242 !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
243 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBMARK) ||
244 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBPRIO) ||
245 !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBQUEUE)))
246 return -IPSET_ERR_PROTOCOL;
247
248 if (tb[IPSET_ATTR_LINENO])
249 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
250
251 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip) ||
252 ip_set_get_extensions(set, tb, &ext);
253 if (ret)
254 return ret;
255
256 memcpy(e.ether, nla_data(tb[IPSET_ATTR_ETHER]), ETH_ALEN);
257 if (is_zero_ether_addr(e.ether))
258 return -IPSET_ERR_HASH_ELEM;
259
260 return adtfn(set, &e, &ext, &ext, flags);
261}
262
263static struct ip_set_type hash_ipmac_type __read_mostly = {
264 .name = "hash:ip,mac",
265 .protocol = IPSET_PROTOCOL,
266 .features = IPSET_TYPE_IP | IPSET_TYPE_MAC,
267 .dimension = IPSET_DIM_TWO,
268 .family = NFPROTO_UNSPEC,
269 .revision_min = IPSET_TYPE_REV_MIN,
270 .revision_max = IPSET_TYPE_REV_MAX,
271 .create_flags[IPSET_TYPE_REV_MAX] = IPSET_CREATE_FLAG_BUCKETSIZE,
272 .create = hash_ipmac_create,
273 .create_policy = {
274 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
275 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
276 [IPSET_ATTR_INITVAL] = { .type = NLA_U32 },
277 [IPSET_ATTR_BUCKETSIZE] = { .type = NLA_U8 },
278 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
279 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
280 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
281 },
282 .adt_policy = {
283 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
284 [IPSET_ATTR_ETHER] = { .type = NLA_BINARY,
285 .len = ETH_ALEN },
286 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
287 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
288 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
289 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
290 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING },
291 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
292 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
293 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
294 },
295 .me = THIS_MODULE,
296};
297
298static int __init
299hash_ipmac_init(void)
300{
301 return ip_set_type_register(&hash_ipmac_type);
302}
303
304static void __exit
305hash_ipmac_fini(void)
306{
307 ip_set_type_unregister(&hash_ipmac_type);
308}
309
310module_init(hash_ipmac_init);
311module_exit(hash_ipmac_fini);
312
