1 /* Copyright (C) 2003-2011 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 as
5 * published by the Free Software Foundation.
8 /* Kernel module implementing an IP set type: the hash:ip,port type */
10 #include <linux/jhash.h>
11 #include <linux/module.h>
13 #include <linux/skbuff.h>
14 #include <linux/errno.h>
15 #include <linux/random.h>
18 #include <net/netlink.h>
21 #include <linux/netfilter.h>
22 #include <linux/netfilter/ipset/pfxlen.h>
23 #include <linux/netfilter/ipset/ip_set.h>
24 #include <linux/netfilter/ipset/ip_set_timeout.h>
25 #include <linux/netfilter/ipset/ip_set_getport.h>
26 #include <linux/netfilter/ipset/ip_set_hash.h>
28 MODULE_LICENSE("GPL");
29 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
30 MODULE_DESCRIPTION("hash:ip,port type of IP sets");
31 MODULE_ALIAS("ip_set_hash:ip,port");
33 /* Type specific function prefix */
34 #define TYPE hash_ipport
37 hash_ipport_same_set(const struct ip_set
*a
, const struct ip_set
*b
);
39 #define hash_ipport4_same_set hash_ipport_same_set
40 #define hash_ipport6_same_set hash_ipport_same_set
42 /* The type variant functions: IPv4 */
44 /* Member elements without timeout */
45 struct hash_ipport4_elem
{
52 /* Member elements with timeout support */
53 struct hash_ipport4_telem
{
58 unsigned long timeout
;
62 hash_ipport4_data_equal(const struct hash_ipport4_elem
*ip1
,
63 const struct hash_ipport4_elem
*ip2
)
65 return ip1
->ip
== ip2
->ip
&&
66 ip1
->port
== ip2
->port
&&
67 ip1
->proto
== ip2
->proto
;
71 hash_ipport4_data_isnull(const struct hash_ipport4_elem
*elem
)
73 return elem
->proto
== 0;
77 hash_ipport4_data_copy(struct hash_ipport4_elem
*dst
,
78 const struct hash_ipport4_elem
*src
)
81 dst
->port
= src
->port
;
82 dst
->proto
= src
->proto
;
86 hash_ipport4_data_zero_out(struct hash_ipport4_elem
*elem
)
92 hash_ipport4_data_list(struct sk_buff
*skb
,
93 const struct hash_ipport4_elem
*data
)
95 NLA_PUT_IPADDR4(skb
, IPSET_ATTR_IP
, data
->ip
);
96 NLA_PUT_NET16(skb
, IPSET_ATTR_PORT
, data
->port
);
97 NLA_PUT_U8(skb
, IPSET_ATTR_PROTO
, data
->proto
);
105 hash_ipport4_data_tlist(struct sk_buff
*skb
,
106 const struct hash_ipport4_elem
*data
)
108 const struct hash_ipport4_telem
*tdata
=
109 (const struct hash_ipport4_telem
*)data
;
111 NLA_PUT_IPADDR4(skb
, IPSET_ATTR_IP
, tdata
->ip
);
112 NLA_PUT_NET16(skb
, IPSET_ATTR_PORT
, tdata
->port
);
113 NLA_PUT_U8(skb
, IPSET_ATTR_PROTO
, data
->proto
);
114 NLA_PUT_NET32(skb
, IPSET_ATTR_TIMEOUT
,
115 htonl(ip_set_timeout_get(tdata
->timeout
)));
125 #include <linux/netfilter/ipset/ip_set_ahash.h>
128 hash_ipport4_kadt(struct ip_set
*set
, const struct sk_buff
*skb
,
129 enum ipset_adt adt
, u8 pf
, u8 dim
, u8 flags
)
131 const struct ip_set_hash
*h
= set
->data
;
132 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
133 struct hash_ipport4_elem data
= { };
135 if (!ip_set_get_ip4_port(skb
, flags
& IPSET_DIM_TWO_SRC
,
136 &data
.port
, &data
.proto
))
139 ip4addrptr(skb
, flags
& IPSET_DIM_ONE_SRC
, &data
.ip
);
141 return adtfn(set
, &data
, h
->timeout
);
145 hash_ipport4_uadt(struct ip_set
*set
, struct nlattr
*tb
[],
146 enum ipset_adt adt
, u32
*lineno
, u32 flags
)
148 const struct ip_set_hash
*h
= set
->data
;
149 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
150 struct hash_ipport4_elem data
= { };
151 u32 ip
, ip_to
, p
, port
, port_to
;
152 u32 timeout
= h
->timeout
;
153 bool with_ports
= false;
156 if (unlikely(!tb
[IPSET_ATTR_IP
] ||
157 !ip_set_attr_netorder(tb
, IPSET_ATTR_PORT
) ||
158 !ip_set_optattr_netorder(tb
, IPSET_ATTR_PORT_TO
) ||
159 !ip_set_optattr_netorder(tb
, IPSET_ATTR_TIMEOUT
)))
160 return -IPSET_ERR_PROTOCOL
;
162 if (tb
[IPSET_ATTR_LINENO
])
163 *lineno
= nla_get_u32(tb
[IPSET_ATTR_LINENO
]);
165 ret
= ip_set_get_ipaddr4(tb
[IPSET_ATTR_IP
], &data
.ip
);
169 if (tb
[IPSET_ATTR_PORT
])
170 data
.port
= nla_get_be16(tb
[IPSET_ATTR_PORT
]);
172 return -IPSET_ERR_PROTOCOL
;
174 if (tb
[IPSET_ATTR_PROTO
]) {
175 data
.proto
= nla_get_u8(tb
[IPSET_ATTR_PROTO
]);
176 with_ports
= ip_set_proto_with_ports(data
.proto
);
179 return -IPSET_ERR_INVALID_PROTO
;
181 return -IPSET_ERR_MISSING_PROTO
;
183 if (!(with_ports
|| data
.proto
== IPPROTO_ICMP
))
186 if (tb
[IPSET_ATTR_TIMEOUT
]) {
187 if (!with_timeout(h
->timeout
))
188 return -IPSET_ERR_TIMEOUT
;
189 timeout
= ip_set_timeout_uget(tb
[IPSET_ATTR_TIMEOUT
]);
192 if (adt
== IPSET_TEST
||
193 !(tb
[IPSET_ATTR_IP_TO
] || tb
[IPSET_ATTR_CIDR
] ||
194 tb
[IPSET_ATTR_PORT_TO
])) {
195 ret
= adtfn(set
, &data
, timeout
);
196 return ip_set_eexist(ret
, flags
) ? 0 : ret
;
200 if (tb
[IPSET_ATTR_IP_TO
]) {
201 ret
= ip_set_get_hostipaddr4(tb
[IPSET_ATTR_IP_TO
], &ip_to
);
206 } else if (tb
[IPSET_ATTR_CIDR
]) {
207 u8 cidr
= nla_get_u8(tb
[IPSET_ATTR_CIDR
]);
210 return -IPSET_ERR_INVALID_CIDR
;
211 ip
&= ip_set_hostmask(cidr
);
212 ip_to
= ip
| ~ip_set_hostmask(cidr
);
216 port_to
= port
= ntohs(data
.port
);
217 if (with_ports
&& tb
[IPSET_ATTR_PORT_TO
]) {
218 port_to
= ip_set_get_h16(tb
[IPSET_ATTR_PORT_TO
]);
223 for (; !before(ip_to
, ip
); ip
++)
224 for (p
= port
; p
<= port_to
; p
++) {
226 data
.port
= htons(p
);
227 ret
= adtfn(set
, &data
, timeout
);
229 if (ret
&& !ip_set_eexist(ret
, flags
))
238 hash_ipport_same_set(const struct ip_set
*a
, const struct ip_set
*b
)
240 const struct ip_set_hash
*x
= a
->data
;
241 const struct ip_set_hash
*y
= b
->data
;
243 /* Resizing changes htable_bits, so we ignore it */
244 return x
->maxelem
== y
->maxelem
&&
245 x
->timeout
== y
->timeout
;
248 /* The type variant functions: IPv6 */
250 struct hash_ipport6_elem
{
251 union nf_inet_addr ip
;
257 struct hash_ipport6_telem
{
258 union nf_inet_addr ip
;
262 unsigned long timeout
;
266 hash_ipport6_data_equal(const struct hash_ipport6_elem
*ip1
,
267 const struct hash_ipport6_elem
*ip2
)
269 return ipv6_addr_cmp(&ip1
->ip
.in6
, &ip2
->ip
.in6
) == 0 &&
270 ip1
->port
== ip2
->port
&&
271 ip1
->proto
== ip2
->proto
;
275 hash_ipport6_data_isnull(const struct hash_ipport6_elem
*elem
)
277 return elem
->proto
== 0;
281 hash_ipport6_data_copy(struct hash_ipport6_elem
*dst
,
282 const struct hash_ipport6_elem
*src
)
284 memcpy(dst
, src
, sizeof(*dst
));
288 hash_ipport6_data_zero_out(struct hash_ipport6_elem
*elem
)
294 hash_ipport6_data_list(struct sk_buff
*skb
,
295 const struct hash_ipport6_elem
*data
)
297 NLA_PUT_IPADDR6(skb
, IPSET_ATTR_IP
, &data
->ip
);
298 NLA_PUT_NET16(skb
, IPSET_ATTR_PORT
, data
->port
);
299 NLA_PUT_U8(skb
, IPSET_ATTR_PROTO
, data
->proto
);
307 hash_ipport6_data_tlist(struct sk_buff
*skb
,
308 const struct hash_ipport6_elem
*data
)
310 const struct hash_ipport6_telem
*e
=
311 (const struct hash_ipport6_telem
*)data
;
313 NLA_PUT_IPADDR6(skb
, IPSET_ATTR_IP
, &e
->ip
);
314 NLA_PUT_NET16(skb
, IPSET_ATTR_PORT
, data
->port
);
315 NLA_PUT_U8(skb
, IPSET_ATTR_PROTO
, data
->proto
);
316 NLA_PUT_NET32(skb
, IPSET_ATTR_TIMEOUT
,
317 htonl(ip_set_timeout_get(e
->timeout
)));
328 #define HOST_MASK 128
329 #include <linux/netfilter/ipset/ip_set_ahash.h>
332 hash_ipport6_kadt(struct ip_set
*set
, const struct sk_buff
*skb
,
333 enum ipset_adt adt
, u8 pf
, u8 dim
, u8 flags
)
335 const struct ip_set_hash
*h
= set
->data
;
336 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
337 struct hash_ipport6_elem data
= { };
339 if (!ip_set_get_ip6_port(skb
, flags
& IPSET_DIM_TWO_SRC
,
340 &data
.port
, &data
.proto
))
343 ip6addrptr(skb
, flags
& IPSET_DIM_ONE_SRC
, &data
.ip
.in6
);
345 return adtfn(set
, &data
, h
->timeout
);
349 hash_ipport6_uadt(struct ip_set
*set
, struct nlattr
*tb
[],
350 enum ipset_adt adt
, u32
*lineno
, u32 flags
)
352 const struct ip_set_hash
*h
= set
->data
;
353 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
354 struct hash_ipport6_elem data
= { };
356 u32 timeout
= h
->timeout
;
357 bool with_ports
= false;
360 if (unlikely(!tb
[IPSET_ATTR_IP
] ||
361 !ip_set_attr_netorder(tb
, IPSET_ATTR_PORT
) ||
362 !ip_set_optattr_netorder(tb
, IPSET_ATTR_PORT_TO
) ||
363 !ip_set_optattr_netorder(tb
, IPSET_ATTR_TIMEOUT
) ||
364 tb
[IPSET_ATTR_IP_TO
] ||
365 tb
[IPSET_ATTR_CIDR
]))
366 return -IPSET_ERR_PROTOCOL
;
368 if (tb
[IPSET_ATTR_LINENO
])
369 *lineno
= nla_get_u32(tb
[IPSET_ATTR_LINENO
]);
371 ret
= ip_set_get_ipaddr6(tb
[IPSET_ATTR_IP
], &data
.ip
);
375 if (tb
[IPSET_ATTR_PORT
])
376 data
.port
= nla_get_be16(tb
[IPSET_ATTR_PORT
]);
378 return -IPSET_ERR_PROTOCOL
;
380 if (tb
[IPSET_ATTR_PROTO
]) {
381 data
.proto
= nla_get_u8(tb
[IPSET_ATTR_PROTO
]);
382 with_ports
= ip_set_proto_with_ports(data
.proto
);
385 return -IPSET_ERR_INVALID_PROTO
;
387 return -IPSET_ERR_MISSING_PROTO
;
389 if (!(with_ports
|| data
.proto
== IPPROTO_ICMPV6
))
392 if (tb
[IPSET_ATTR_TIMEOUT
]) {
393 if (!with_timeout(h
->timeout
))
394 return -IPSET_ERR_TIMEOUT
;
395 timeout
= ip_set_timeout_uget(tb
[IPSET_ATTR_TIMEOUT
]);
398 if (adt
== IPSET_TEST
|| !with_ports
|| !tb
[IPSET_ATTR_PORT_TO
]) {
399 ret
= adtfn(set
, &data
, timeout
);
400 return ip_set_eexist(ret
, flags
) ? 0 : ret
;
403 port
= ntohs(data
.port
);
404 port_to
= ip_set_get_h16(tb
[IPSET_ATTR_PORT_TO
]);
408 for (; port
<= port_to
; port
++) {
409 data
.port
= htons(port
);
410 ret
= adtfn(set
, &data
, timeout
);
412 if (ret
&& !ip_set_eexist(ret
, flags
))
420 /* Create hash:ip type of sets */
423 hash_ipport_create(struct ip_set
*set
, struct nlattr
*tb
[], u32 flags
)
425 struct ip_set_hash
*h
;
426 u32 hashsize
= IPSET_DEFAULT_HASHSIZE
, maxelem
= IPSET_DEFAULT_MAXELEM
;
429 if (!(set
->family
== AF_INET
|| set
->family
== AF_INET6
))
430 return -IPSET_ERR_INVALID_FAMILY
;
432 if (unlikely(!ip_set_optattr_netorder(tb
, IPSET_ATTR_HASHSIZE
) ||
433 !ip_set_optattr_netorder(tb
, IPSET_ATTR_MAXELEM
) ||
434 !ip_set_optattr_netorder(tb
, IPSET_ATTR_TIMEOUT
)))
435 return -IPSET_ERR_PROTOCOL
;
437 if (tb
[IPSET_ATTR_HASHSIZE
]) {
438 hashsize
= ip_set_get_h32(tb
[IPSET_ATTR_HASHSIZE
]);
439 if (hashsize
< IPSET_MIMINAL_HASHSIZE
)
440 hashsize
= IPSET_MIMINAL_HASHSIZE
;
443 if (tb
[IPSET_ATTR_MAXELEM
])
444 maxelem
= ip_set_get_h32(tb
[IPSET_ATTR_MAXELEM
]);
446 h
= kzalloc(sizeof(*h
), GFP_KERNEL
);
450 h
->maxelem
= maxelem
;
451 get_random_bytes(&h
->initval
, sizeof(h
->initval
));
452 h
->timeout
= IPSET_NO_TIMEOUT
;
454 hbits
= htable_bits(hashsize
);
455 h
->table
= ip_set_alloc(
456 sizeof(struct htable
)
457 + jhash_size(hbits
) * sizeof(struct hbucket
));
462 h
->table
->htable_bits
= hbits
;
466 if (tb
[IPSET_ATTR_TIMEOUT
]) {
467 h
->timeout
= ip_set_timeout_uget(tb
[IPSET_ATTR_TIMEOUT
]);
469 set
->variant
= set
->family
== AF_INET
470 ? &hash_ipport4_tvariant
: &hash_ipport6_tvariant
;
472 if (set
->family
== AF_INET
)
473 hash_ipport4_gc_init(set
);
475 hash_ipport6_gc_init(set
);
477 set
->variant
= set
->family
== AF_INET
478 ? &hash_ipport4_variant
: &hash_ipport6_variant
;
481 pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
482 set
->name
, jhash_size(h
->table
->htable_bits
),
483 h
->table
->htable_bits
, h
->maxelem
, set
->data
, h
->table
);
488 static struct ip_set_type hash_ipport_type __read_mostly
= {
489 .name
= "hash:ip,port",
490 .protocol
= IPSET_PROTOCOL
,
491 .features
= IPSET_TYPE_IP
| IPSET_TYPE_PORT
,
492 .dimension
= IPSET_DIM_TWO
,
495 .create
= hash_ipport_create
,
497 [IPSET_ATTR_HASHSIZE
] = { .type
= NLA_U32
},
498 [IPSET_ATTR_MAXELEM
] = { .type
= NLA_U32
},
499 [IPSET_ATTR_PROBES
] = { .type
= NLA_U8
},
500 [IPSET_ATTR_RESIZE
] = { .type
= NLA_U8
},
501 [IPSET_ATTR_PROTO
] = { .type
= NLA_U8
},
502 [IPSET_ATTR_TIMEOUT
] = { .type
= NLA_U32
},
505 [IPSET_ATTR_IP
] = { .type
= NLA_NESTED
},
506 [IPSET_ATTR_IP_TO
] = { .type
= NLA_NESTED
},
507 [IPSET_ATTR_PORT
] = { .type
= NLA_U16
},
508 [IPSET_ATTR_PORT_TO
] = { .type
= NLA_U16
},
509 [IPSET_ATTR_CIDR
] = { .type
= NLA_U8
},
510 [IPSET_ATTR_PROTO
] = { .type
= NLA_U8
},
511 [IPSET_ATTR_TIMEOUT
] = { .type
= NLA_U32
},
512 [IPSET_ATTR_LINENO
] = { .type
= NLA_U32
},
518 hash_ipport_init(void)
520 return ip_set_type_register(&hash_ipport_type
);
524 hash_ipport_fini(void)
526 ip_set_type_unregister(&hash_ipport_type
);
529 module_init(hash_ipport_init
);
530 module_exit(hash_ipport_fini
);