1 /* Copyright (C) 2003-2013 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,net 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_getport.h>
25 #include <linux/netfilter/ipset/ip_set_hash.h>
27 #define IPSET_TYPE_REV_MIN 0
28 /* 1 SCTP and UDPLITE support added */
29 /* 2 Range as input support for IPv4 added */
30 /* 3 nomatch flag support added */
31 /* 4 Counters support added */
32 /* 5 Comments support added */
33 /* 6 Forceadd support added */
34 #define IPSET_TYPE_REV_MAX 7 /* skbinfo support added */
36 MODULE_LICENSE("GPL");
37 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
38 IP_SET_MODULE_DESC("hash:ip,port,net", IPSET_TYPE_REV_MIN
, IPSET_TYPE_REV_MAX
);
39 MODULE_ALIAS("ip_set_hash:ip,port,net");
41 /* Type specific function prefix */
42 #define HTYPE hash_ipportnet
44 /* We squeeze the "nomatch" flag into cidr: we don't support cidr == 0
45 * However this way we have to store internally cidr - 1,
46 * dancing back and forth.
48 #define IP_SET_HASH_WITH_NETS_PACKED
49 #define IP_SET_HASH_WITH_PROTO
50 #define IP_SET_HASH_WITH_NETS
55 struct hash_ipportnet4_elem
{
64 /* Common functions */
67 hash_ipportnet4_data_equal(const struct hash_ipportnet4_elem
*ip1
,
68 const struct hash_ipportnet4_elem
*ip2
,
71 return ip1
->ip
== ip2
->ip
&&
72 ip1
->ip2
== ip2
->ip2
&&
73 ip1
->cidr
== ip2
->cidr
&&
74 ip1
->port
== ip2
->port
&&
75 ip1
->proto
== ip2
->proto
;
79 hash_ipportnet4_do_data_match(const struct hash_ipportnet4_elem
*elem
)
81 return elem
->nomatch
? -ENOTEMPTY
: 1;
85 hash_ipportnet4_data_set_flags(struct hash_ipportnet4_elem
*elem
, u32 flags
)
87 elem
->nomatch
= !!((flags
>> 16) & IPSET_FLAG_NOMATCH
);
91 hash_ipportnet4_data_reset_flags(struct hash_ipportnet4_elem
*elem
, u8
*flags
)
93 swap(*flags
, elem
->nomatch
);
97 hash_ipportnet4_data_netmask(struct hash_ipportnet4_elem
*elem
, u8 cidr
)
99 elem
->ip2
&= ip_set_netmask(cidr
);
100 elem
->cidr
= cidr
- 1;
104 hash_ipportnet4_data_list(struct sk_buff
*skb
,
105 const struct hash_ipportnet4_elem
*data
)
107 u32 flags
= data
->nomatch
? IPSET_FLAG_NOMATCH
: 0;
109 if (nla_put_ipaddr4(skb
, IPSET_ATTR_IP
, data
->ip
) ||
110 nla_put_ipaddr4(skb
, IPSET_ATTR_IP2
, data
->ip2
) ||
111 nla_put_net16(skb
, IPSET_ATTR_PORT
, data
->port
) ||
112 nla_put_u8(skb
, IPSET_ATTR_CIDR2
, data
->cidr
+ 1) ||
113 nla_put_u8(skb
, IPSET_ATTR_PROTO
, data
->proto
) ||
115 nla_put_net32(skb
, IPSET_ATTR_CADT_FLAGS
, htonl(flags
))))
116 goto nla_put_failure
;
124 hash_ipportnet4_data_next(struct hash_ipportnet4_elem
*next
,
125 const struct hash_ipportnet4_elem
*d
)
128 next
->port
= d
->port
;
132 #define MTYPE hash_ipportnet4
134 #include "ip_set_hash_gen.h"
137 hash_ipportnet4_kadt(struct ip_set
*set
, const struct sk_buff
*skb
,
138 const struct xt_action_param
*par
,
139 enum ipset_adt adt
, struct ip_set_adt_opt
*opt
)
141 const struct hash_ipportnet
*h
= set
->data
;
142 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
143 struct hash_ipportnet4_elem e
= {
144 .cidr
= INIT_CIDR(h
->nets
[0].cidr
[0], HOST_MASK
),
146 struct ip_set_ext ext
= IP_SET_INIT_KEXT(skb
, opt
, set
);
148 if (adt
== IPSET_TEST
)
149 e
.cidr
= HOST_MASK
- 1;
151 if (!ip_set_get_ip4_port(skb
, opt
->flags
& IPSET_DIM_TWO_SRC
,
155 ip4addrptr(skb
, opt
->flags
& IPSET_DIM_ONE_SRC
, &e
.ip
);
156 ip4addrptr(skb
, opt
->flags
& IPSET_DIM_THREE_SRC
, &e
.ip2
);
157 e
.ip2
&= ip_set_netmask(e
.cidr
+ 1);
159 return adtfn(set
, &e
, &ext
, &opt
->ext
, opt
->cmdflags
);
163 hash_ipportnet4_uadt(struct ip_set
*set
, struct nlattr
*tb
[],
164 enum ipset_adt adt
, u32
*lineno
, u32 flags
, bool retried
)
166 const struct hash_ipportnet
*h
= set
->data
;
167 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
168 struct hash_ipportnet4_elem e
= { .cidr
= HOST_MASK
- 1 };
169 struct ip_set_ext ext
= IP_SET_INIT_UEXT(set
);
170 u32 ip
= 0, ip_to
= 0, p
= 0, port
, port_to
;
171 u32 ip2_from
= 0, ip2_to
= 0, ip2_last
, ip2
;
172 bool with_ports
= false;
176 if (tb
[IPSET_ATTR_LINENO
])
177 *lineno
= nla_get_u32(tb
[IPSET_ATTR_LINENO
]);
179 if (unlikely(!tb
[IPSET_ATTR_IP
] || !tb
[IPSET_ATTR_IP2
] ||
180 !ip_set_attr_netorder(tb
, IPSET_ATTR_PORT
) ||
181 !ip_set_optattr_netorder(tb
, IPSET_ATTR_PORT_TO
) ||
182 !ip_set_optattr_netorder(tb
, IPSET_ATTR_CADT_FLAGS
)))
183 return -IPSET_ERR_PROTOCOL
;
185 ret
= ip_set_get_hostipaddr4(tb
[IPSET_ATTR_IP
], &ip
);
189 ret
= ip_set_get_extensions(set
, tb
, &ext
);
193 ret
= ip_set_get_hostipaddr4(tb
[IPSET_ATTR_IP2
], &ip2_from
);
197 if (tb
[IPSET_ATTR_CIDR2
]) {
198 cidr
= nla_get_u8(tb
[IPSET_ATTR_CIDR2
]);
199 if (!cidr
|| cidr
> HOST_MASK
)
200 return -IPSET_ERR_INVALID_CIDR
;
204 e
.port
= nla_get_be16(tb
[IPSET_ATTR_PORT
]);
206 if (tb
[IPSET_ATTR_PROTO
]) {
207 e
.proto
= nla_get_u8(tb
[IPSET_ATTR_PROTO
]);
208 with_ports
= ip_set_proto_with_ports(e
.proto
);
211 return -IPSET_ERR_INVALID_PROTO
;
213 return -IPSET_ERR_MISSING_PROTO
;
216 if (!(with_ports
|| e
.proto
== IPPROTO_ICMP
))
219 if (tb
[IPSET_ATTR_CADT_FLAGS
]) {
220 u32 cadt_flags
= ip_set_get_h32(tb
[IPSET_ATTR_CADT_FLAGS
]);
222 if (cadt_flags
& IPSET_FLAG_NOMATCH
)
223 flags
|= (IPSET_FLAG_NOMATCH
<< 16);
226 with_ports
= with_ports
&& tb
[IPSET_ATTR_PORT_TO
];
227 if (adt
== IPSET_TEST
||
228 !(tb
[IPSET_ATTR_CIDR
] || tb
[IPSET_ATTR_IP_TO
] || with_ports
||
229 tb
[IPSET_ATTR_IP2_TO
])) {
231 e
.ip2
= htonl(ip2_from
& ip_set_hostmask(e
.cidr
+ 1));
232 ret
= adtfn(set
, &e
, &ext
, &ext
, flags
);
233 return ip_set_enomatch(ret
, flags
, adt
, set
) ? -ret
:
234 ip_set_eexist(ret
, flags
) ? 0 : ret
;
238 if (tb
[IPSET_ATTR_IP_TO
]) {
239 ret
= ip_set_get_hostipaddr4(tb
[IPSET_ATTR_IP_TO
], &ip_to
);
244 } else if (tb
[IPSET_ATTR_CIDR
]) {
245 cidr
= nla_get_u8(tb
[IPSET_ATTR_CIDR
]);
247 if (!cidr
|| cidr
> HOST_MASK
)
248 return -IPSET_ERR_INVALID_CIDR
;
249 ip_set_mask_from_to(ip
, ip_to
, cidr
);
252 port_to
= port
= ntohs(e
.port
);
253 if (tb
[IPSET_ATTR_PORT_TO
]) {
254 port_to
= ip_set_get_h16(tb
[IPSET_ATTR_PORT_TO
]);
260 if (tb
[IPSET_ATTR_IP2_TO
]) {
261 ret
= ip_set_get_hostipaddr4(tb
[IPSET_ATTR_IP2_TO
], &ip2_to
);
264 if (ip2_from
> ip2_to
)
265 swap(ip2_from
, ip2_to
);
266 if (ip2_from
+ UINT_MAX
== ip2_to
)
267 return -IPSET_ERR_HASH_RANGE
;
269 ip_set_mask_from_to(ip2_from
, ip2_to
, e
.cidr
+ 1);
273 ip
= ntohl(h
->next
.ip
);
274 for (; !before(ip_to
, ip
); ip
++) {
276 p
= retried
&& ip
== ntohl(h
->next
.ip
) ? ntohs(h
->next
.port
)
278 for (; p
<= port_to
; p
++) {
281 ip
== ntohl(h
->next
.ip
) &&
282 p
== ntohs(h
->next
.port
)
283 ? ntohl(h
->next
.ip2
) : ip2_from
;
284 while (!after(ip2
, ip2_to
)) {
286 ip2_last
= ip_set_range_to_cidr(ip2
, ip2_to
,
289 ret
= adtfn(set
, &e
, &ext
, &ext
, flags
);
291 if (ret
&& !ip_set_eexist(ret
, flags
))
304 struct hash_ipportnet6_elem
{
305 union nf_inet_addr ip
;
306 union nf_inet_addr ip2
;
313 /* Common functions */
316 hash_ipportnet6_data_equal(const struct hash_ipportnet6_elem
*ip1
,
317 const struct hash_ipportnet6_elem
*ip2
,
320 return ipv6_addr_equal(&ip1
->ip
.in6
, &ip2
->ip
.in6
) &&
321 ipv6_addr_equal(&ip1
->ip2
.in6
, &ip2
->ip2
.in6
) &&
322 ip1
->cidr
== ip2
->cidr
&&
323 ip1
->port
== ip2
->port
&&
324 ip1
->proto
== ip2
->proto
;
328 hash_ipportnet6_do_data_match(const struct hash_ipportnet6_elem
*elem
)
330 return elem
->nomatch
? -ENOTEMPTY
: 1;
334 hash_ipportnet6_data_set_flags(struct hash_ipportnet6_elem
*elem
, u32 flags
)
336 elem
->nomatch
= !!((flags
>> 16) & IPSET_FLAG_NOMATCH
);
340 hash_ipportnet6_data_reset_flags(struct hash_ipportnet6_elem
*elem
, u8
*flags
)
342 swap(*flags
, elem
->nomatch
);
346 hash_ipportnet6_data_netmask(struct hash_ipportnet6_elem
*elem
, u8 cidr
)
348 ip6_netmask(&elem
->ip2
, cidr
);
349 elem
->cidr
= cidr
- 1;
353 hash_ipportnet6_data_list(struct sk_buff
*skb
,
354 const struct hash_ipportnet6_elem
*data
)
356 u32 flags
= data
->nomatch
? IPSET_FLAG_NOMATCH
: 0;
358 if (nla_put_ipaddr6(skb
, IPSET_ATTR_IP
, &data
->ip
.in6
) ||
359 nla_put_ipaddr6(skb
, IPSET_ATTR_IP2
, &data
->ip2
.in6
) ||
360 nla_put_net16(skb
, IPSET_ATTR_PORT
, data
->port
) ||
361 nla_put_u8(skb
, IPSET_ATTR_CIDR2
, data
->cidr
+ 1) ||
362 nla_put_u8(skb
, IPSET_ATTR_PROTO
, data
->proto
) ||
364 nla_put_net32(skb
, IPSET_ATTR_CADT_FLAGS
, htonl(flags
))))
365 goto nla_put_failure
;
373 hash_ipportnet6_data_next(struct hash_ipportnet4_elem
*next
,
374 const struct hash_ipportnet6_elem
*d
)
376 next
->port
= d
->port
;
382 #define MTYPE hash_ipportnet6
383 #define HOST_MASK 128
384 #define IP_SET_EMIT_CREATE
385 #include "ip_set_hash_gen.h"
388 hash_ipportnet6_kadt(struct ip_set
*set
, const struct sk_buff
*skb
,
389 const struct xt_action_param
*par
,
390 enum ipset_adt adt
, struct ip_set_adt_opt
*opt
)
392 const struct hash_ipportnet
*h
= set
->data
;
393 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
394 struct hash_ipportnet6_elem e
= {
395 .cidr
= INIT_CIDR(h
->nets
[0].cidr
[0], HOST_MASK
),
397 struct ip_set_ext ext
= IP_SET_INIT_KEXT(skb
, opt
, set
);
399 if (adt
== IPSET_TEST
)
400 e
.cidr
= HOST_MASK
- 1;
402 if (!ip_set_get_ip6_port(skb
, opt
->flags
& IPSET_DIM_TWO_SRC
,
406 ip6addrptr(skb
, opt
->flags
& IPSET_DIM_ONE_SRC
, &e
.ip
.in6
);
407 ip6addrptr(skb
, opt
->flags
& IPSET_DIM_THREE_SRC
, &e
.ip2
.in6
);
408 ip6_netmask(&e
.ip2
, e
.cidr
+ 1);
410 return adtfn(set
, &e
, &ext
, &opt
->ext
, opt
->cmdflags
);
414 hash_ipportnet6_uadt(struct ip_set
*set
, struct nlattr
*tb
[],
415 enum ipset_adt adt
, u32
*lineno
, u32 flags
, bool retried
)
417 const struct hash_ipportnet
*h
= set
->data
;
418 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
419 struct hash_ipportnet6_elem e
= { .cidr
= HOST_MASK
- 1 };
420 struct ip_set_ext ext
= IP_SET_INIT_UEXT(set
);
422 bool with_ports
= false;
426 if (tb
[IPSET_ATTR_LINENO
])
427 *lineno
= nla_get_u32(tb
[IPSET_ATTR_LINENO
]);
429 if (unlikely(!tb
[IPSET_ATTR_IP
] || !tb
[IPSET_ATTR_IP2
] ||
430 !ip_set_attr_netorder(tb
, IPSET_ATTR_PORT
) ||
431 !ip_set_optattr_netorder(tb
, IPSET_ATTR_PORT_TO
) ||
432 !ip_set_optattr_netorder(tb
, IPSET_ATTR_CADT_FLAGS
)))
433 return -IPSET_ERR_PROTOCOL
;
434 if (unlikely(tb
[IPSET_ATTR_IP_TO
]))
435 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED
;
436 if (unlikely(tb
[IPSET_ATTR_CIDR
])) {
437 u8 cidr
= nla_get_u8(tb
[IPSET_ATTR_CIDR
]);
439 if (cidr
!= HOST_MASK
)
440 return -IPSET_ERR_INVALID_CIDR
;
443 ret
= ip_set_get_ipaddr6(tb
[IPSET_ATTR_IP
], &e
.ip
);
447 ret
= ip_set_get_extensions(set
, tb
, &ext
);
451 ret
= ip_set_get_ipaddr6(tb
[IPSET_ATTR_IP2
], &e
.ip2
);
455 if (tb
[IPSET_ATTR_CIDR2
]) {
456 cidr
= nla_get_u8(tb
[IPSET_ATTR_CIDR2
]);
457 if (!cidr
|| cidr
> HOST_MASK
)
458 return -IPSET_ERR_INVALID_CIDR
;
462 ip6_netmask(&e
.ip2
, e
.cidr
+ 1);
464 e
.port
= nla_get_be16(tb
[IPSET_ATTR_PORT
]);
466 if (tb
[IPSET_ATTR_PROTO
]) {
467 e
.proto
= nla_get_u8(tb
[IPSET_ATTR_PROTO
]);
468 with_ports
= ip_set_proto_with_ports(e
.proto
);
471 return -IPSET_ERR_INVALID_PROTO
;
473 return -IPSET_ERR_MISSING_PROTO
;
476 if (!(with_ports
|| e
.proto
== IPPROTO_ICMPV6
))
479 if (tb
[IPSET_ATTR_CADT_FLAGS
]) {
480 u32 cadt_flags
= ip_set_get_h32(tb
[IPSET_ATTR_CADT_FLAGS
]);
482 if (cadt_flags
& IPSET_FLAG_NOMATCH
)
483 flags
|= (IPSET_FLAG_NOMATCH
<< 16);
486 if (adt
== IPSET_TEST
|| !with_ports
|| !tb
[IPSET_ATTR_PORT_TO
]) {
487 ret
= adtfn(set
, &e
, &ext
, &ext
, flags
);
488 return ip_set_enomatch(ret
, flags
, adt
, set
) ? -ret
:
489 ip_set_eexist(ret
, flags
) ? 0 : ret
;
492 port
= ntohs(e
.port
);
493 port_to
= ip_set_get_h16(tb
[IPSET_ATTR_PORT_TO
]);
498 port
= ntohs(h
->next
.port
);
499 for (; port
<= port_to
; port
++) {
500 e
.port
= htons(port
);
501 ret
= adtfn(set
, &e
, &ext
, &ext
, flags
);
503 if (ret
&& !ip_set_eexist(ret
, flags
))
511 static struct ip_set_type hash_ipportnet_type __read_mostly
= {
512 .name
= "hash:ip,port,net",
513 .protocol
= IPSET_PROTOCOL
,
514 .features
= IPSET_TYPE_IP
| IPSET_TYPE_PORT
| IPSET_TYPE_IP2
|
516 .dimension
= IPSET_DIM_THREE
,
517 .family
= NFPROTO_UNSPEC
,
518 .revision_min
= IPSET_TYPE_REV_MIN
,
519 .revision_max
= IPSET_TYPE_REV_MAX
,
520 .create
= hash_ipportnet_create
,
522 [IPSET_ATTR_HASHSIZE
] = { .type
= NLA_U32
},
523 [IPSET_ATTR_MAXELEM
] = { .type
= NLA_U32
},
524 [IPSET_ATTR_PROBES
] = { .type
= NLA_U8
},
525 [IPSET_ATTR_RESIZE
] = { .type
= NLA_U8
},
526 [IPSET_ATTR_TIMEOUT
] = { .type
= NLA_U32
},
527 [IPSET_ATTR_CADT_FLAGS
] = { .type
= NLA_U32
},
530 [IPSET_ATTR_IP
] = { .type
= NLA_NESTED
},
531 [IPSET_ATTR_IP_TO
] = { .type
= NLA_NESTED
},
532 [IPSET_ATTR_IP2
] = { .type
= NLA_NESTED
},
533 [IPSET_ATTR_IP2_TO
] = { .type
= NLA_NESTED
},
534 [IPSET_ATTR_PORT
] = { .type
= NLA_U16
},
535 [IPSET_ATTR_PORT_TO
] = { .type
= NLA_U16
},
536 [IPSET_ATTR_CIDR
] = { .type
= NLA_U8
},
537 [IPSET_ATTR_CIDR2
] = { .type
= NLA_U8
},
538 [IPSET_ATTR_PROTO
] = { .type
= NLA_U8
},
539 [IPSET_ATTR_CADT_FLAGS
] = { .type
= NLA_U32
},
540 [IPSET_ATTR_TIMEOUT
] = { .type
= NLA_U32
},
541 [IPSET_ATTR_LINENO
] = { .type
= NLA_U32
},
542 [IPSET_ATTR_BYTES
] = { .type
= NLA_U64
},
543 [IPSET_ATTR_PACKETS
] = { .type
= NLA_U64
},
544 [IPSET_ATTR_COMMENT
] = { .type
= NLA_NUL_STRING
,
545 .len
= IPSET_MAX_COMMENT_SIZE
},
546 [IPSET_ATTR_SKBMARK
] = { .type
= NLA_U64
},
547 [IPSET_ATTR_SKBPRIO
] = { .type
= NLA_U32
},
548 [IPSET_ATTR_SKBQUEUE
] = { .type
= NLA_U16
},
554 hash_ipportnet_init(void)
556 return ip_set_type_register(&hash_ipportnet_type
);
560 hash_ipportnet_fini(void)
563 ip_set_type_unregister(&hash_ipportnet_type
);
566 module_init(hash_ipportnet_init
);
567 module_exit(hash_ipportnet_fini
);