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10#include <linux/jhash.h>
11#include <linux/module.h>
12#include <linux/etherdevice.h>
13#include <linux/skbuff.h>
14#include <linux/errno.h>
15#include <linux/if_ether.h>
16#include <net/netlink.h>
17
18#include <linux/netfilter.h>
19#include <linux/netfilter/ipset/ip_set.h>
20#include <linux/netfilter/ipset/ip_set_hash.h>
21
22#define IPSET_TYPE_REV_MIN 0
23#define IPSET_TYPE_REV_MAX 0
24
25MODULE_LICENSE("GPL");
26MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
27IP_SET_MODULE_DESC("hash:mac", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
28MODULE_ALIAS("ip_set_hash:mac");
29
30
31#define HTYPE hash_mac
32
33
34struct hash_mac4_elem {
35
36 union {
37 unsigned char ether[ETH_ALEN];
38 __be32 foo[2];
39 };
40};
41
42
43
44static inline bool
45hash_mac4_data_equal(const struct hash_mac4_elem *e1,
46 const struct hash_mac4_elem *e2,
47 u32 *multi)
48{
49 return ether_addr_equal(e1->ether, e2->ether);
50}
51
52static inline bool
53hash_mac4_data_list(struct sk_buff *skb, const struct hash_mac4_elem *e)
54{
55 if (nla_put(skb, IPSET_ATTR_ETHER, ETH_ALEN, e->ether))
56 goto nla_put_failure;
57 return false;
58
59nla_put_failure:
60 return true;
61}
62
63static inline void
64hash_mac4_data_next(struct hash_mac4_elem *next,
65 const struct hash_mac4_elem *e)
66{
67}
68
69#define MTYPE hash_mac4
70#define HOST_MASK 32
71#define IP_SET_EMIT_CREATE
72#define IP_SET_PROTO_UNDEF
73#include "ip_set_hash_gen.h"
74
75
76static const unsigned char invalid_ether[ETH_ALEN] = { 0 };
77
78static int
79hash_mac4_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)
82{
83 ipset_adtfn adtfn = set->variant->adt[adt];
84 struct hash_mac4_elem e = { { .foo[0] = 0, .foo[1] = 0 } };
85 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
86
87
88 if (!(opt->flags & IPSET_DIM_ONE_SRC))
89 return 0;
90
91 if (skb_mac_header(skb) < skb->head ||
92 (skb_mac_header(skb) + ETH_HLEN) > skb->data)
93 return -EINVAL;
94
95 ether_addr_copy(e.ether, eth_hdr(skb)->h_source);
96 if (memcmp(e.ether, invalid_ether, ETH_ALEN) == 0)
97 return -EINVAL;
98 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
99}
100
101static int
102hash_mac4_uadt(struct ip_set *set, struct nlattr *tb[],
103 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
104{
105 ipset_adtfn adtfn = set->variant->adt[adt];
106 struct hash_mac4_elem e = { { .foo[0] = 0, .foo[1] = 0 } };
107 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
108 int ret;
109
110 if (tb[IPSET_ATTR_LINENO])
111 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
112
113 if (unlikely(!tb[IPSET_ATTR_ETHER] ||
114 nla_len(tb[IPSET_ATTR_ETHER]) != ETH_ALEN))
115 return -IPSET_ERR_PROTOCOL;
116
117 ret = ip_set_get_extensions(set, tb, &ext);
118 if (ret)
119 return ret;
120 ether_addr_copy(e.ether, nla_data(tb[IPSET_ATTR_ETHER]));
121 if (memcmp(e.ether, invalid_ether, ETH_ALEN) == 0)
122 return -IPSET_ERR_HASH_ELEM;
123
124 return adtfn(set, &e, &ext, &ext, flags);
125}
126
127static struct ip_set_type hash_mac_type __read_mostly = {
128 .name = "hash:mac",
129 .protocol = IPSET_PROTOCOL,
130 .features = IPSET_TYPE_MAC,
131 .dimension = IPSET_DIM_ONE,
132 .family = NFPROTO_UNSPEC,
133 .revision_min = IPSET_TYPE_REV_MIN,
134 .revision_max = IPSET_TYPE_REV_MAX,
135 .create = hash_mac_create,
136 .create_policy = {
137 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
138 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
139 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
140 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
141 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
142 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
143 },
144 .adt_policy = {
145 [IPSET_ATTR_ETHER] = { .type = NLA_BINARY,
146 .len = ETH_ALEN },
147 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
148 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
149 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
150 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
151 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING,
152 .len = IPSET_MAX_COMMENT_SIZE },
153 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
154 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
155 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
156 },
157 .me = THIS_MODULE,
158};
159
160static int __init
161hash_mac_init(void)
162{
163 return ip_set_type_register(&hash_mac_type);
164}
165
166static void __exit
167hash_mac_fini(void)
168{
169 rcu_barrier();
170 ip_set_type_unregister(&hash_mac_type);
171}
172
173module_init(hash_mac_init);
174module_exit(hash_mac_fini);
175
