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6#include <linux/jhash.h>
7#include <linux/module.h>
8#include <linux/etherdevice.h>
9#include <linux/skbuff.h>
10#include <linux/errno.h>
11#include <linux/if_ether.h>
12#include <net/netlink.h>
13
14#include <linux/netfilter.h>
15#include <linux/netfilter/ipset/ip_set.h>
16#include <linux/netfilter/ipset/ip_set_hash.h>
17
18#define IPSET_TYPE_REV_MIN 0
19#define IPSET_TYPE_REV_MAX 1
20
21MODULE_LICENSE("GPL");
22MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@netfilter.org>");
23IP_SET_MODULE_DESC("hash:mac", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
24MODULE_ALIAS("ip_set_hash:mac");
25
26
27#define HTYPE hash_mac
28
29
30struct hash_mac4_elem {
31
32 union {
33 unsigned char ether[ETH_ALEN];
34 __be32 foo[2];
35 };
36};
37
38
39
40static bool
41hash_mac4_data_equal(const struct hash_mac4_elem *e1,
42 const struct hash_mac4_elem *e2,
43 u32 *multi)
44{
45 return ether_addr_equal(e1->ether, e2->ether);
46}
47
48static bool
49hash_mac4_data_list(struct sk_buff *skb, const struct hash_mac4_elem *e)
50{
51 if (nla_put(skb, IPSET_ATTR_ETHER, ETH_ALEN, e->ether))
52 goto nla_put_failure;
53 return false;
54
55nla_put_failure:
56 return true;
57}
58
59static void
60hash_mac4_data_next(struct hash_mac4_elem *next,
61 const struct hash_mac4_elem *e)
62{
63}
64
65#define MTYPE hash_mac4
66#define HOST_MASK 32
67#define IP_SET_EMIT_CREATE
68#define IP_SET_PROTO_UNDEF
69#include "ip_set_hash_gen.h"
70
71static int
72hash_mac4_kadt(struct ip_set *set, const struct sk_buff *skb,
73 const struct xt_action_param *par,
74 enum ipset_adt adt, struct ip_set_adt_opt *opt)
75{
76 ipset_adtfn adtfn = set->variant->adt[adt];
77 struct hash_mac4_elem e = { { .foo[0] = 0, .foo[1] = 0 } };
78 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
79
80 if (skb_mac_header(skb) < skb->head ||
81 (skb_mac_header(skb) + ETH_HLEN) > skb->data)
82 return -EINVAL;
83
84 if (opt->flags & IPSET_DIM_ONE_SRC)
85 ether_addr_copy(e.ether, eth_hdr(skb)->h_source);
86 else
87 ether_addr_copy(e.ether, eth_hdr(skb)->h_dest);
88
89 if (is_zero_ether_addr(e.ether))
90 return -EINVAL;
91 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
92}
93
94static int
95hash_mac4_uadt(struct ip_set *set, struct nlattr *tb[],
96 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
97{
98 ipset_adtfn adtfn = set->variant->adt[adt];
99 struct hash_mac4_elem e = { { .foo[0] = 0, .foo[1] = 0 } };
100 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
101 int ret;
102
103 if (tb[IPSET_ATTR_LINENO])
104 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
105
106 if (unlikely(!tb[IPSET_ATTR_ETHER] ||
107 nla_len(tb[IPSET_ATTR_ETHER]) != ETH_ALEN))
108 return -IPSET_ERR_PROTOCOL;
109
110 ret = ip_set_get_extensions(set, tb, &ext);
111 if (ret)
112 return ret;
113 ether_addr_copy(e.ether, nla_data(tb[IPSET_ATTR_ETHER]));
114 if (is_zero_ether_addr(e.ether))
115 return -IPSET_ERR_HASH_ELEM;
116
117 return adtfn(set, &e, &ext, &ext, flags);
118}
119
120static struct ip_set_type hash_mac_type __read_mostly = {
121 .name = "hash:mac",
122 .protocol = IPSET_PROTOCOL,
123 .features = IPSET_TYPE_MAC,
124 .dimension = IPSET_DIM_ONE,
125 .family = NFPROTO_UNSPEC,
126 .revision_min = IPSET_TYPE_REV_MIN,
127 .revision_max = IPSET_TYPE_REV_MAX,
128 .create_flags[IPSET_TYPE_REV_MAX] = IPSET_CREATE_FLAG_BUCKETSIZE,
129 .create = hash_mac_create,
130 .create_policy = {
131 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
132 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
133 [IPSET_ATTR_INITVAL] = { .type = NLA_U32 },
134 [IPSET_ATTR_BUCKETSIZE] = { .type = NLA_U8 },
135 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
136 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
137 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
138 },
139 .adt_policy = {
140 [IPSET_ATTR_ETHER] = { .type = NLA_BINARY,
141 .len = ETH_ALEN },
142 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
143 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
144 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
145 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
146 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING,
147 .len = IPSET_MAX_COMMENT_SIZE },
148 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
149 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
150 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
151 },
152 .me = THIS_MODULE,
153};
154
155static int __init
156hash_mac_init(void)
157{
158 return ip_set_type_register(&hash_mac_type);
159}
160
161static void __exit
162hash_mac_fini(void)
163{
164 rcu_barrier();
165 ip_set_type_unregister(&hash_mac_type);
166}
167
168module_init(hash_mac_init);
169module_exit(hash_mac_fini);
170
