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:net,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>
20 #include <linux/netfilter.h>
21 #include <linux/netfilter/ipset/pfxlen.h>
22 #include <linux/netfilter/ipset/ip_set.h>
23 #include <linux/netfilter/ipset/ip_set_getport.h>
24 #include <linux/netfilter/ipset/ip_set_hash.h>
26 #define IPSET_TYPE_REV_MIN 0
27 /* 1 SCTP and UDPLITE support added */
28 /* 2 Range as input support for IPv4 added */
29 /* 3 nomatch flag support added */
30 /* 4 Counters support added */
31 /* 5 Comments support added */
32 /* 6 Forceadd support added */
33 #define IPSET_TYPE_REV_MAX 7 /* skbinfo support added */
35 MODULE_LICENSE("GPL");
36 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
37 IP_SET_MODULE_DESC("hash:net,port", IPSET_TYPE_REV_MIN
, IPSET_TYPE_REV_MAX
);
38 MODULE_ALIAS("ip_set_hash:net,port");
40 /* Type specific function prefix */
41 #define HTYPE hash_netport
42 #define IP_SET_HASH_WITH_PROTO
43 #define IP_SET_HASH_WITH_NETS
45 /* We squeeze the "nomatch" flag into cidr: we don't support cidr == 0
46 * However this way we have to store internally cidr - 1,
47 * dancing back and forth.
49 #define IP_SET_HASH_WITH_NETS_PACKED
54 struct hash_netport4_elem
{
62 /* Common functions */
65 hash_netport4_data_equal(const struct hash_netport4_elem
*ip1
,
66 const struct hash_netport4_elem
*ip2
,
69 return ip1
->ip
== ip2
->ip
&&
70 ip1
->port
== ip2
->port
&&
71 ip1
->proto
== ip2
->proto
&&
72 ip1
->cidr
== ip2
->cidr
;
76 hash_netport4_do_data_match(const struct hash_netport4_elem
*elem
)
78 return elem
->nomatch
? -ENOTEMPTY
: 1;
82 hash_netport4_data_set_flags(struct hash_netport4_elem
*elem
, u32 flags
)
84 elem
->nomatch
= !!((flags
>> 16) & IPSET_FLAG_NOMATCH
);
88 hash_netport4_data_reset_flags(struct hash_netport4_elem
*elem
, u8
*flags
)
90 swap(*flags
, elem
->nomatch
);
94 hash_netport4_data_netmask(struct hash_netport4_elem
*elem
, u8 cidr
)
96 elem
->ip
&= ip_set_netmask(cidr
);
97 elem
->cidr
= cidr
- 1;
101 hash_netport4_data_list(struct sk_buff
*skb
,
102 const struct hash_netport4_elem
*data
)
104 u32 flags
= data
->nomatch
? IPSET_FLAG_NOMATCH
: 0;
106 if (nla_put_ipaddr4(skb
, IPSET_ATTR_IP
, data
->ip
) ||
107 nla_put_net16(skb
, IPSET_ATTR_PORT
, data
->port
) ||
108 nla_put_u8(skb
, IPSET_ATTR_CIDR
, data
->cidr
+ 1) ||
109 nla_put_u8(skb
, IPSET_ATTR_PROTO
, data
->proto
) ||
111 nla_put_net32(skb
, IPSET_ATTR_CADT_FLAGS
, htonl(flags
))))
112 goto nla_put_failure
;
120 hash_netport4_data_next(struct hash_netport4_elem
*next
,
121 const struct hash_netport4_elem
*d
)
124 next
->port
= d
->port
;
127 #define MTYPE hash_netport4
129 #include "ip_set_hash_gen.h"
132 hash_netport4_kadt(struct ip_set
*set
, const struct sk_buff
*skb
,
133 const struct xt_action_param
*par
,
134 enum ipset_adt adt
, struct ip_set_adt_opt
*opt
)
136 const struct hash_netport
*h
= set
->data
;
137 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
138 struct hash_netport4_elem e
= {
139 .cidr
= INIT_CIDR(h
->nets
[0].cidr
[0], HOST_MASK
),
141 struct ip_set_ext ext
= IP_SET_INIT_KEXT(skb
, opt
, set
);
143 if (adt
== IPSET_TEST
)
144 e
.cidr
= HOST_MASK
- 1;
146 if (!ip_set_get_ip4_port(skb
, opt
->flags
& IPSET_DIM_TWO_SRC
,
150 ip4addrptr(skb
, opt
->flags
& IPSET_DIM_ONE_SRC
, &e
.ip
);
151 e
.ip
&= ip_set_netmask(e
.cidr
+ 1);
153 return adtfn(set
, &e
, &ext
, &opt
->ext
, opt
->cmdflags
);
157 hash_netport4_uadt(struct ip_set
*set
, struct nlattr
*tb
[],
158 enum ipset_adt adt
, u32
*lineno
, u32 flags
, bool retried
)
160 const struct hash_netport
*h
= set
->data
;
161 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
162 struct hash_netport4_elem e
= { .cidr
= HOST_MASK
- 1 };
163 struct ip_set_ext ext
= IP_SET_INIT_UEXT(set
);
164 u32 port
, port_to
, p
= 0, ip
= 0, ip_to
= 0, last
;
165 bool with_ports
= false;
169 if (tb
[IPSET_ATTR_LINENO
])
170 *lineno
= nla_get_u32(tb
[IPSET_ATTR_LINENO
]);
172 if (unlikely(!tb
[IPSET_ATTR_IP
] ||
173 !ip_set_attr_netorder(tb
, IPSET_ATTR_PORT
) ||
174 !ip_set_optattr_netorder(tb
, IPSET_ATTR_PORT_TO
) ||
175 !ip_set_optattr_netorder(tb
, IPSET_ATTR_CADT_FLAGS
)))
176 return -IPSET_ERR_PROTOCOL
;
178 ret
= ip_set_get_hostipaddr4(tb
[IPSET_ATTR_IP
], &ip
);
182 ret
= ip_set_get_extensions(set
, tb
, &ext
);
186 if (tb
[IPSET_ATTR_CIDR
]) {
187 cidr
= nla_get_u8(tb
[IPSET_ATTR_CIDR
]);
188 if (!cidr
|| cidr
> HOST_MASK
)
189 return -IPSET_ERR_INVALID_CIDR
;
193 e
.port
= nla_get_be16(tb
[IPSET_ATTR_PORT
]);
195 if (tb
[IPSET_ATTR_PROTO
]) {
196 e
.proto
= nla_get_u8(tb
[IPSET_ATTR_PROTO
]);
197 with_ports
= ip_set_proto_with_ports(e
.proto
);
200 return -IPSET_ERR_INVALID_PROTO
;
202 return -IPSET_ERR_MISSING_PROTO
;
205 if (!(with_ports
|| e
.proto
== IPPROTO_ICMP
))
208 with_ports
= with_ports
&& tb
[IPSET_ATTR_PORT_TO
];
210 if (tb
[IPSET_ATTR_CADT_FLAGS
]) {
211 u32 cadt_flags
= ip_set_get_h32(tb
[IPSET_ATTR_CADT_FLAGS
]);
213 if (cadt_flags
& IPSET_FLAG_NOMATCH
)
214 flags
|= (IPSET_FLAG_NOMATCH
<< 16);
217 if (adt
== IPSET_TEST
|| !(with_ports
|| tb
[IPSET_ATTR_IP_TO
])) {
218 e
.ip
= htonl(ip
& ip_set_hostmask(e
.cidr
+ 1));
219 ret
= adtfn(set
, &e
, &ext
, &ext
, flags
);
220 return ip_set_enomatch(ret
, flags
, adt
, set
) ? -ret
:
221 ip_set_eexist(ret
, flags
) ? 0 : ret
;
224 port
= port_to
= ntohs(e
.port
);
225 if (tb
[IPSET_ATTR_PORT_TO
]) {
226 port_to
= ip_set_get_h16(tb
[IPSET_ATTR_PORT_TO
]);
230 if (tb
[IPSET_ATTR_IP_TO
]) {
231 ret
= ip_set_get_hostipaddr4(tb
[IPSET_ATTR_IP_TO
], &ip_to
);
236 if (ip
+ UINT_MAX
== ip_to
)
237 return -IPSET_ERR_HASH_RANGE
;
239 ip_set_mask_from_to(ip
, ip_to
, e
.cidr
+ 1);
243 ip
= ntohl(h
->next
.ip
);
244 while (!after(ip
, ip_to
)) {
246 last
= ip_set_range_to_cidr(ip
, ip_to
, &cidr
);
248 p
= retried
&& ip
== ntohl(h
->next
.ip
) ? ntohs(h
->next
.port
)
250 for (; p
<= port_to
; p
++) {
252 ret
= adtfn(set
, &e
, &ext
, &ext
, flags
);
254 if (ret
&& !ip_set_eexist(ret
, flags
))
266 struct hash_netport6_elem
{
267 union nf_inet_addr ip
;
274 /* Common functions */
277 hash_netport6_data_equal(const struct hash_netport6_elem
*ip1
,
278 const struct hash_netport6_elem
*ip2
,
281 return ipv6_addr_equal(&ip1
->ip
.in6
, &ip2
->ip
.in6
) &&
282 ip1
->port
== ip2
->port
&&
283 ip1
->proto
== ip2
->proto
&&
284 ip1
->cidr
== ip2
->cidr
;
288 hash_netport6_do_data_match(const struct hash_netport6_elem
*elem
)
290 return elem
->nomatch
? -ENOTEMPTY
: 1;
294 hash_netport6_data_set_flags(struct hash_netport6_elem
*elem
, u32 flags
)
296 elem
->nomatch
= !!((flags
>> 16) & IPSET_FLAG_NOMATCH
);
300 hash_netport6_data_reset_flags(struct hash_netport6_elem
*elem
, u8
*flags
)
302 swap(*flags
, elem
->nomatch
);
306 hash_netport6_data_netmask(struct hash_netport6_elem
*elem
, u8 cidr
)
308 ip6_netmask(&elem
->ip
, cidr
);
309 elem
->cidr
= cidr
- 1;
313 hash_netport6_data_list(struct sk_buff
*skb
,
314 const struct hash_netport6_elem
*data
)
316 u32 flags
= data
->nomatch
? IPSET_FLAG_NOMATCH
: 0;
318 if (nla_put_ipaddr6(skb
, IPSET_ATTR_IP
, &data
->ip
.in6
) ||
319 nla_put_net16(skb
, IPSET_ATTR_PORT
, data
->port
) ||
320 nla_put_u8(skb
, IPSET_ATTR_CIDR
, data
->cidr
+ 1) ||
321 nla_put_u8(skb
, IPSET_ATTR_PROTO
, data
->proto
) ||
323 nla_put_net32(skb
, IPSET_ATTR_CADT_FLAGS
, htonl(flags
))))
324 goto nla_put_failure
;
332 hash_netport6_data_next(struct hash_netport4_elem
*next
,
333 const struct hash_netport6_elem
*d
)
335 next
->port
= d
->port
;
341 #define MTYPE hash_netport6
342 #define HOST_MASK 128
343 #define IP_SET_EMIT_CREATE
344 #include "ip_set_hash_gen.h"
347 hash_netport6_kadt(struct ip_set
*set
, const struct sk_buff
*skb
,
348 const struct xt_action_param
*par
,
349 enum ipset_adt adt
, struct ip_set_adt_opt
*opt
)
351 const struct hash_netport
*h
= set
->data
;
352 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
353 struct hash_netport6_elem e
= {
354 .cidr
= INIT_CIDR(h
->nets
[0].cidr
[0], HOST_MASK
),
356 struct ip_set_ext ext
= IP_SET_INIT_KEXT(skb
, opt
, set
);
358 if (adt
== IPSET_TEST
)
359 e
.cidr
= HOST_MASK
- 1;
361 if (!ip_set_get_ip6_port(skb
, opt
->flags
& IPSET_DIM_TWO_SRC
,
365 ip6addrptr(skb
, opt
->flags
& IPSET_DIM_ONE_SRC
, &e
.ip
.in6
);
366 ip6_netmask(&e
.ip
, e
.cidr
+ 1);
368 return adtfn(set
, &e
, &ext
, &opt
->ext
, opt
->cmdflags
);
372 hash_netport6_uadt(struct ip_set
*set
, struct nlattr
*tb
[],
373 enum ipset_adt adt
, u32
*lineno
, u32 flags
, bool retried
)
375 const struct hash_netport
*h
= set
->data
;
376 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
377 struct hash_netport6_elem e
= { .cidr
= HOST_MASK
- 1 };
378 struct ip_set_ext ext
= IP_SET_INIT_UEXT(set
);
380 bool with_ports
= false;
384 if (tb
[IPSET_ATTR_LINENO
])
385 *lineno
= nla_get_u32(tb
[IPSET_ATTR_LINENO
]);
387 if (unlikely(!tb
[IPSET_ATTR_IP
] ||
388 !ip_set_attr_netorder(tb
, IPSET_ATTR_PORT
) ||
389 !ip_set_optattr_netorder(tb
, IPSET_ATTR_PORT_TO
) ||
390 !ip_set_optattr_netorder(tb
, IPSET_ATTR_CADT_FLAGS
)))
391 return -IPSET_ERR_PROTOCOL
;
392 if (unlikely(tb
[IPSET_ATTR_IP_TO
]))
393 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED
;
395 ret
= ip_set_get_ipaddr6(tb
[IPSET_ATTR_IP
], &e
.ip
);
399 ret
= ip_set_get_extensions(set
, tb
, &ext
);
403 if (tb
[IPSET_ATTR_CIDR
]) {
404 cidr
= nla_get_u8(tb
[IPSET_ATTR_CIDR
]);
405 if (!cidr
|| cidr
> HOST_MASK
)
406 return -IPSET_ERR_INVALID_CIDR
;
409 ip6_netmask(&e
.ip
, e
.cidr
+ 1);
411 e
.port
= nla_get_be16(tb
[IPSET_ATTR_PORT
]);
413 if (tb
[IPSET_ATTR_PROTO
]) {
414 e
.proto
= nla_get_u8(tb
[IPSET_ATTR_PROTO
]);
415 with_ports
= ip_set_proto_with_ports(e
.proto
);
418 return -IPSET_ERR_INVALID_PROTO
;
420 return -IPSET_ERR_MISSING_PROTO
;
423 if (!(with_ports
|| e
.proto
== IPPROTO_ICMPV6
))
426 if (tb
[IPSET_ATTR_CADT_FLAGS
]) {
427 u32 cadt_flags
= ip_set_get_h32(tb
[IPSET_ATTR_CADT_FLAGS
]);
429 if (cadt_flags
& IPSET_FLAG_NOMATCH
)
430 flags
|= (IPSET_FLAG_NOMATCH
<< 16);
433 if (adt
== IPSET_TEST
|| !with_ports
|| !tb
[IPSET_ATTR_PORT_TO
]) {
434 ret
= adtfn(set
, &e
, &ext
, &ext
, flags
);
435 return ip_set_enomatch(ret
, flags
, adt
, set
) ? -ret
:
436 ip_set_eexist(ret
, flags
) ? 0 : ret
;
439 port
= ntohs(e
.port
);
440 port_to
= ip_set_get_h16(tb
[IPSET_ATTR_PORT_TO
]);
445 port
= ntohs(h
->next
.port
);
446 for (; port
<= port_to
; port
++) {
447 e
.port
= htons(port
);
448 ret
= adtfn(set
, &e
, &ext
, &ext
, flags
);
450 if (ret
&& !ip_set_eexist(ret
, flags
))
458 static struct ip_set_type hash_netport_type __read_mostly
= {
459 .name
= "hash:net,port",
460 .protocol
= IPSET_PROTOCOL
,
461 .features
= IPSET_TYPE_IP
| IPSET_TYPE_PORT
| IPSET_TYPE_NOMATCH
,
462 .dimension
= IPSET_DIM_TWO
,
463 .family
= NFPROTO_UNSPEC
,
464 .revision_min
= IPSET_TYPE_REV_MIN
,
465 .revision_max
= IPSET_TYPE_REV_MAX
,
466 .create
= hash_netport_create
,
468 [IPSET_ATTR_HASHSIZE
] = { .type
= NLA_U32
},
469 [IPSET_ATTR_MAXELEM
] = { .type
= NLA_U32
},
470 [IPSET_ATTR_PROBES
] = { .type
= NLA_U8
},
471 [IPSET_ATTR_RESIZE
] = { .type
= NLA_U8
},
472 [IPSET_ATTR_PROTO
] = { .type
= NLA_U8
},
473 [IPSET_ATTR_TIMEOUT
] = { .type
= NLA_U32
},
474 [IPSET_ATTR_CADT_FLAGS
] = { .type
= NLA_U32
},
477 [IPSET_ATTR_IP
] = { .type
= NLA_NESTED
},
478 [IPSET_ATTR_IP_TO
] = { .type
= NLA_NESTED
},
479 [IPSET_ATTR_PORT
] = { .type
= NLA_U16
},
480 [IPSET_ATTR_PORT_TO
] = { .type
= NLA_U16
},
481 [IPSET_ATTR_PROTO
] = { .type
= NLA_U8
},
482 [IPSET_ATTR_CIDR
] = { .type
= NLA_U8
},
483 [IPSET_ATTR_TIMEOUT
] = { .type
= NLA_U32
},
484 [IPSET_ATTR_LINENO
] = { .type
= NLA_U32
},
485 [IPSET_ATTR_CADT_FLAGS
] = { .type
= NLA_U32
},
486 [IPSET_ATTR_BYTES
] = { .type
= NLA_U64
},
487 [IPSET_ATTR_PACKETS
] = { .type
= NLA_U64
},
488 [IPSET_ATTR_COMMENT
] = { .type
= NLA_NUL_STRING
,
489 .len
= IPSET_MAX_COMMENT_SIZE
},
490 [IPSET_ATTR_SKBMARK
] = { .type
= NLA_U64
},
491 [IPSET_ATTR_SKBPRIO
] = { .type
= NLA_U32
},
492 [IPSET_ATTR_SKBQUEUE
] = { .type
= NLA_U16
},
498 hash_netport_init(void)
500 return ip_set_type_register(&hash_netport_type
);
504 hash_netport_fini(void)
507 ip_set_type_unregister(&hash_netport_type
);
510 module_init(hash_netport_init
);
511 module_exit(hash_netport_fini
);