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
,
66 return ip1
->ip
== ip2
->ip
&&
67 ip1
->port
== ip2
->port
&&
68 ip1
->proto
== ip2
->proto
;
72 hash_ipport4_data_isnull(const struct hash_ipport4_elem
*elem
)
74 return elem
->proto
== 0;
78 hash_ipport4_data_copy(struct hash_ipport4_elem
*dst
,
79 const struct hash_ipport4_elem
*src
)
82 dst
->port
= src
->port
;
83 dst
->proto
= src
->proto
;
87 hash_ipport4_data_zero_out(struct hash_ipport4_elem
*elem
)
93 hash_ipport4_data_list(struct sk_buff
*skb
,
94 const struct hash_ipport4_elem
*data
)
96 if (nla_put_ipaddr4(skb
, IPSET_ATTR_IP
, data
->ip
) ||
97 nla_put_net16(skb
, IPSET_ATTR_PORT
, data
->port
) ||
98 nla_put_u8(skb
, IPSET_ATTR_PROTO
, data
->proto
))
107 hash_ipport4_data_tlist(struct sk_buff
*skb
,
108 const struct hash_ipport4_elem
*data
)
110 const struct hash_ipport4_telem
*tdata
=
111 (const struct hash_ipport4_telem
*)data
;
113 if (nla_put_ipaddr4(skb
, IPSET_ATTR_IP
, tdata
->ip
) ||
114 nla_put_net16(skb
, IPSET_ATTR_PORT
, tdata
->port
) ||
115 nla_put_u8(skb
, IPSET_ATTR_PROTO
, data
->proto
) ||
116 nla_put_net32(skb
, IPSET_ATTR_TIMEOUT
,
117 htonl(ip_set_timeout_get(tdata
->timeout
))))
118 goto nla_put_failure
;
127 #include <linux/netfilter/ipset/ip_set_ahash.h>
130 hash_ipport4_data_next(struct ip_set_hash
*h
,
131 const struct hash_ipport4_elem
*d
)
133 h
->next
.ip
= ntohl(d
->ip
);
134 h
->next
.port
= ntohs(d
->port
);
138 hash_ipport4_kadt(struct ip_set
*set
, const struct sk_buff
*skb
,
139 const struct xt_action_param
*par
,
140 enum ipset_adt adt
, const struct ip_set_adt_opt
*opt
)
142 const struct ip_set_hash
*h
= set
->data
;
143 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
144 struct hash_ipport4_elem data
= { };
146 if (!ip_set_get_ip4_port(skb
, opt
->flags
& IPSET_DIM_TWO_SRC
,
147 &data
.port
, &data
.proto
))
150 ip4addrptr(skb
, opt
->flags
& IPSET_DIM_ONE_SRC
, &data
.ip
);
152 return adtfn(set
, &data
, opt_timeout(opt
, h
), opt
->cmdflags
);
156 hash_ipport4_uadt(struct ip_set
*set
, struct nlattr
*tb
[],
157 enum ipset_adt adt
, u32
*lineno
, u32 flags
, bool retried
)
159 const struct ip_set_hash
*h
= set
->data
;
160 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
161 struct hash_ipport4_elem data
= { };
162 u32 ip
, ip_to
= 0, p
= 0, port
, port_to
;
163 u32 timeout
= h
->timeout
;
164 bool with_ports
= false;
167 if (unlikely(!tb
[IPSET_ATTR_IP
] ||
168 !ip_set_attr_netorder(tb
, IPSET_ATTR_PORT
) ||
169 !ip_set_optattr_netorder(tb
, IPSET_ATTR_PORT_TO
) ||
170 !ip_set_optattr_netorder(tb
, IPSET_ATTR_TIMEOUT
)))
171 return -IPSET_ERR_PROTOCOL
;
173 if (tb
[IPSET_ATTR_LINENO
])
174 *lineno
= nla_get_u32(tb
[IPSET_ATTR_LINENO
]);
176 ret
= ip_set_get_ipaddr4(tb
[IPSET_ATTR_IP
], &data
.ip
);
180 if (tb
[IPSET_ATTR_PORT
])
181 data
.port
= nla_get_be16(tb
[IPSET_ATTR_PORT
]);
183 return -IPSET_ERR_PROTOCOL
;
185 if (tb
[IPSET_ATTR_PROTO
]) {
186 data
.proto
= nla_get_u8(tb
[IPSET_ATTR_PROTO
]);
187 with_ports
= ip_set_proto_with_ports(data
.proto
);
190 return -IPSET_ERR_INVALID_PROTO
;
192 return -IPSET_ERR_MISSING_PROTO
;
194 if (!(with_ports
|| data
.proto
== IPPROTO_ICMP
))
197 if (tb
[IPSET_ATTR_TIMEOUT
]) {
198 if (!with_timeout(h
->timeout
))
199 return -IPSET_ERR_TIMEOUT
;
200 timeout
= ip_set_timeout_uget(tb
[IPSET_ATTR_TIMEOUT
]);
203 if (adt
== IPSET_TEST
||
204 !(tb
[IPSET_ATTR_IP_TO
] || tb
[IPSET_ATTR_CIDR
] ||
205 tb
[IPSET_ATTR_PORT_TO
])) {
206 ret
= adtfn(set
, &data
, timeout
, flags
);
207 return ip_set_eexist(ret
, flags
) ? 0 : ret
;
211 if (tb
[IPSET_ATTR_IP_TO
]) {
212 ret
= ip_set_get_hostipaddr4(tb
[IPSET_ATTR_IP_TO
], &ip_to
);
217 } else if (tb
[IPSET_ATTR_CIDR
]) {
218 u8 cidr
= nla_get_u8(tb
[IPSET_ATTR_CIDR
]);
221 return -IPSET_ERR_INVALID_CIDR
;
222 ip_set_mask_from_to(ip
, ip_to
, cidr
);
226 port_to
= port
= ntohs(data
.port
);
227 if (with_ports
&& tb
[IPSET_ATTR_PORT_TO
]) {
228 port_to
= ip_set_get_h16(tb
[IPSET_ATTR_PORT_TO
]);
235 for (; !before(ip_to
, ip
); ip
++) {
236 p
= retried
&& ip
== h
->next
.ip
? h
->next
.port
: port
;
237 for (; p
<= port_to
; p
++) {
239 data
.port
= htons(p
);
240 ret
= adtfn(set
, &data
, timeout
, flags
);
242 if (ret
&& !ip_set_eexist(ret
, flags
))
252 hash_ipport_same_set(const struct ip_set
*a
, const struct ip_set
*b
)
254 const struct ip_set_hash
*x
= a
->data
;
255 const struct ip_set_hash
*y
= b
->data
;
257 /* Resizing changes htable_bits, so we ignore it */
258 return x
->maxelem
== y
->maxelem
&&
259 x
->timeout
== y
->timeout
;
262 /* The type variant functions: IPv6 */
264 struct hash_ipport6_elem
{
265 union nf_inet_addr ip
;
271 struct hash_ipport6_telem
{
272 union nf_inet_addr ip
;
276 unsigned long timeout
;
280 hash_ipport6_data_equal(const struct hash_ipport6_elem
*ip1
,
281 const struct hash_ipport6_elem
*ip2
,
284 return ipv6_addr_cmp(&ip1
->ip
.in6
, &ip2
->ip
.in6
) == 0 &&
285 ip1
->port
== ip2
->port
&&
286 ip1
->proto
== ip2
->proto
;
290 hash_ipport6_data_isnull(const struct hash_ipport6_elem
*elem
)
292 return elem
->proto
== 0;
296 hash_ipport6_data_copy(struct hash_ipport6_elem
*dst
,
297 const struct hash_ipport6_elem
*src
)
299 memcpy(dst
, src
, sizeof(*dst
));
303 hash_ipport6_data_zero_out(struct hash_ipport6_elem
*elem
)
309 hash_ipport6_data_list(struct sk_buff
*skb
,
310 const struct hash_ipport6_elem
*data
)
312 if (nla_put_ipaddr6(skb
, IPSET_ATTR_IP
, &data
->ip
.in6
) ||
313 nla_put_net16(skb
, IPSET_ATTR_PORT
, data
->port
) ||
314 nla_put_u8(skb
, IPSET_ATTR_PROTO
, data
->proto
))
315 goto nla_put_failure
;
323 hash_ipport6_data_tlist(struct sk_buff
*skb
,
324 const struct hash_ipport6_elem
*data
)
326 const struct hash_ipport6_telem
*e
=
327 (const struct hash_ipport6_telem
*)data
;
329 if (nla_put_ipaddr6(skb
, IPSET_ATTR_IP
, &e
->ip
.in6
) ||
330 nla_put_net16(skb
, IPSET_ATTR_PORT
, data
->port
) ||
331 nla_put_u8(skb
, IPSET_ATTR_PROTO
, data
->proto
) ||
332 nla_put_net32(skb
, IPSET_ATTR_TIMEOUT
,
333 htonl(ip_set_timeout_get(e
->timeout
))))
334 goto nla_put_failure
;
345 #define HOST_MASK 128
346 #include <linux/netfilter/ipset/ip_set_ahash.h>
349 hash_ipport6_data_next(struct ip_set_hash
*h
,
350 const struct hash_ipport6_elem
*d
)
352 h
->next
.port
= ntohs(d
->port
);
356 hash_ipport6_kadt(struct ip_set
*set
, const struct sk_buff
*skb
,
357 const struct xt_action_param
*par
,
358 enum ipset_adt adt
, const struct ip_set_adt_opt
*opt
)
360 const struct ip_set_hash
*h
= set
->data
;
361 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
362 struct hash_ipport6_elem data
= { };
364 if (!ip_set_get_ip6_port(skb
, opt
->flags
& IPSET_DIM_TWO_SRC
,
365 &data
.port
, &data
.proto
))
368 ip6addrptr(skb
, opt
->flags
& IPSET_DIM_ONE_SRC
, &data
.ip
.in6
);
370 return adtfn(set
, &data
, opt_timeout(opt
, h
), opt
->cmdflags
);
374 hash_ipport6_uadt(struct ip_set
*set
, struct nlattr
*tb
[],
375 enum ipset_adt adt
, u32
*lineno
, u32 flags
, bool retried
)
377 const struct ip_set_hash
*h
= set
->data
;
378 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
379 struct hash_ipport6_elem data
= { };
381 u32 timeout
= h
->timeout
;
382 bool with_ports
= false;
385 if (unlikely(!tb
[IPSET_ATTR_IP
] ||
386 !ip_set_attr_netorder(tb
, IPSET_ATTR_PORT
) ||
387 !ip_set_optattr_netorder(tb
, IPSET_ATTR_PORT_TO
) ||
388 !ip_set_optattr_netorder(tb
, IPSET_ATTR_TIMEOUT
) ||
389 tb
[IPSET_ATTR_IP_TO
] ||
390 tb
[IPSET_ATTR_CIDR
]))
391 return -IPSET_ERR_PROTOCOL
;
393 if (tb
[IPSET_ATTR_LINENO
])
394 *lineno
= nla_get_u32(tb
[IPSET_ATTR_LINENO
]);
396 ret
= ip_set_get_ipaddr6(tb
[IPSET_ATTR_IP
], &data
.ip
);
400 if (tb
[IPSET_ATTR_PORT
])
401 data
.port
= nla_get_be16(tb
[IPSET_ATTR_PORT
]);
403 return -IPSET_ERR_PROTOCOL
;
405 if (tb
[IPSET_ATTR_PROTO
]) {
406 data
.proto
= nla_get_u8(tb
[IPSET_ATTR_PROTO
]);
407 with_ports
= ip_set_proto_with_ports(data
.proto
);
410 return -IPSET_ERR_INVALID_PROTO
;
412 return -IPSET_ERR_MISSING_PROTO
;
414 if (!(with_ports
|| data
.proto
== IPPROTO_ICMPV6
))
417 if (tb
[IPSET_ATTR_TIMEOUT
]) {
418 if (!with_timeout(h
->timeout
))
419 return -IPSET_ERR_TIMEOUT
;
420 timeout
= ip_set_timeout_uget(tb
[IPSET_ATTR_TIMEOUT
]);
423 if (adt
== IPSET_TEST
|| !with_ports
|| !tb
[IPSET_ATTR_PORT_TO
]) {
424 ret
= adtfn(set
, &data
, timeout
, flags
);
425 return ip_set_eexist(ret
, flags
) ? 0 : ret
;
428 port
= ntohs(data
.port
);
429 port_to
= ip_set_get_h16(tb
[IPSET_ATTR_PORT_TO
]);
435 for (; port
<= port_to
; port
++) {
436 data
.port
= htons(port
);
437 ret
= adtfn(set
, &data
, timeout
, flags
);
439 if (ret
&& !ip_set_eexist(ret
, flags
))
447 /* Create hash:ip type of sets */
450 hash_ipport_create(struct ip_set
*set
, struct nlattr
*tb
[], u32 flags
)
452 struct ip_set_hash
*h
;
453 u32 hashsize
= IPSET_DEFAULT_HASHSIZE
, maxelem
= IPSET_DEFAULT_MAXELEM
;
457 if (!(set
->family
== NFPROTO_IPV4
|| set
->family
== NFPROTO_IPV6
))
458 return -IPSET_ERR_INVALID_FAMILY
;
460 if (unlikely(!ip_set_optattr_netorder(tb
, IPSET_ATTR_HASHSIZE
) ||
461 !ip_set_optattr_netorder(tb
, IPSET_ATTR_MAXELEM
) ||
462 !ip_set_optattr_netorder(tb
, IPSET_ATTR_TIMEOUT
)))
463 return -IPSET_ERR_PROTOCOL
;
465 if (tb
[IPSET_ATTR_HASHSIZE
]) {
466 hashsize
= ip_set_get_h32(tb
[IPSET_ATTR_HASHSIZE
]);
467 if (hashsize
< IPSET_MIMINAL_HASHSIZE
)
468 hashsize
= IPSET_MIMINAL_HASHSIZE
;
471 if (tb
[IPSET_ATTR_MAXELEM
])
472 maxelem
= ip_set_get_h32(tb
[IPSET_ATTR_MAXELEM
]);
474 h
= kzalloc(sizeof(*h
), GFP_KERNEL
);
478 h
->maxelem
= maxelem
;
479 get_random_bytes(&h
->initval
, sizeof(h
->initval
));
480 h
->timeout
= IPSET_NO_TIMEOUT
;
482 hbits
= htable_bits(hashsize
);
483 hsize
= htable_size(hbits
);
488 h
->table
= ip_set_alloc(hsize
);
493 h
->table
->htable_bits
= hbits
;
497 if (tb
[IPSET_ATTR_TIMEOUT
]) {
498 h
->timeout
= ip_set_timeout_uget(tb
[IPSET_ATTR_TIMEOUT
]);
500 set
->variant
= set
->family
== NFPROTO_IPV4
501 ? &hash_ipport4_tvariant
: &hash_ipport6_tvariant
;
503 if (set
->family
== NFPROTO_IPV4
)
504 hash_ipport4_gc_init(set
);
506 hash_ipport6_gc_init(set
);
508 set
->variant
= set
->family
== NFPROTO_IPV4
509 ? &hash_ipport4_variant
: &hash_ipport6_variant
;
512 pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
513 set
->name
, jhash_size(h
->table
->htable_bits
),
514 h
->table
->htable_bits
, h
->maxelem
, set
->data
, h
->table
);
519 static struct ip_set_type hash_ipport_type __read_mostly
= {
520 .name
= "hash:ip,port",
521 .protocol
= IPSET_PROTOCOL
,
522 .features
= IPSET_TYPE_IP
| IPSET_TYPE_PORT
,
523 .dimension
= IPSET_DIM_TWO
,
524 .family
= NFPROTO_UNSPEC
,
526 .revision_max
= 1, /* SCTP and UDPLITE support added */
527 .create
= hash_ipport_create
,
529 [IPSET_ATTR_HASHSIZE
] = { .type
= NLA_U32
},
530 [IPSET_ATTR_MAXELEM
] = { .type
= NLA_U32
},
531 [IPSET_ATTR_PROBES
] = { .type
= NLA_U8
},
532 [IPSET_ATTR_RESIZE
] = { .type
= NLA_U8
},
533 [IPSET_ATTR_PROTO
] = { .type
= NLA_U8
},
534 [IPSET_ATTR_TIMEOUT
] = { .type
= NLA_U32
},
537 [IPSET_ATTR_IP
] = { .type
= NLA_NESTED
},
538 [IPSET_ATTR_IP_TO
] = { .type
= NLA_NESTED
},
539 [IPSET_ATTR_PORT
] = { .type
= NLA_U16
},
540 [IPSET_ATTR_PORT_TO
] = { .type
= NLA_U16
},
541 [IPSET_ATTR_CIDR
] = { .type
= NLA_U8
},
542 [IPSET_ATTR_PROTO
] = { .type
= NLA_U8
},
543 [IPSET_ATTR_TIMEOUT
] = { .type
= NLA_U32
},
544 [IPSET_ATTR_LINENO
] = { .type
= NLA_U32
},
550 hash_ipport_init(void)
552 return ip_set_type_register(&hash_ipport_type
);
556 hash_ipport_fini(void)
558 ip_set_type_unregister(&hash_ipport_type
);
561 module_init(hash_ipport_init
);
562 module_exit(hash_ipport_fini
);