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,ip 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 Counters support added */
30 /* 3 Comments support added */
31 /* 4 Forceadd support added */
32 #define IPSET_TYPE_REV_MAX 5 /* skbinfo support added */
34 MODULE_LICENSE("GPL");
35 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
36 IP_SET_MODULE_DESC("hash:ip,port,ip", IPSET_TYPE_REV_MIN
, IPSET_TYPE_REV_MAX
);
37 MODULE_ALIAS("ip_set_hash:ip,port,ip");
39 /* Type specific function prefix */
40 #define HTYPE hash_ipportip
45 struct hash_ipportip4_elem
{
54 hash_ipportip4_data_equal(const struct hash_ipportip4_elem
*ip1
,
55 const struct hash_ipportip4_elem
*ip2
,
58 return ip1
->ip
== ip2
->ip
&&
59 ip1
->ip2
== ip2
->ip2
&&
60 ip1
->port
== ip2
->port
&&
61 ip1
->proto
== ip2
->proto
;
65 hash_ipportip4_data_list(struct sk_buff
*skb
,
66 const struct hash_ipportip4_elem
*data
)
68 if (nla_put_ipaddr4(skb
, IPSET_ATTR_IP
, data
->ip
) ||
69 nla_put_ipaddr4(skb
, IPSET_ATTR_IP2
, data
->ip2
) ||
70 nla_put_net16(skb
, IPSET_ATTR_PORT
, data
->port
) ||
71 nla_put_u8(skb
, IPSET_ATTR_PROTO
, data
->proto
))
80 hash_ipportip4_data_next(struct hash_ipportip4_elem
*next
,
81 const struct hash_ipportip4_elem
*d
)
87 /* Common functions */
88 #define MTYPE hash_ipportip4
90 #include "ip_set_hash_gen.h"
93 hash_ipportip4_kadt(struct ip_set
*set
, const struct sk_buff
*skb
,
94 const struct xt_action_param
*par
,
95 enum ipset_adt adt
, struct ip_set_adt_opt
*opt
)
97 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
98 struct hash_ipportip4_elem e
= { .ip
= 0 };
99 struct ip_set_ext ext
= IP_SET_INIT_KEXT(skb
, opt
, set
);
101 if (!ip_set_get_ip4_port(skb
, opt
->flags
& IPSET_DIM_TWO_SRC
,
105 ip4addrptr(skb
, opt
->flags
& IPSET_DIM_ONE_SRC
, &e
.ip
);
106 ip4addrptr(skb
, opt
->flags
& IPSET_DIM_THREE_SRC
, &e
.ip2
);
107 return adtfn(set
, &e
, &ext
, &opt
->ext
, opt
->cmdflags
);
111 hash_ipportip4_uadt(struct ip_set
*set
, struct nlattr
*tb
[],
112 enum ipset_adt adt
, u32
*lineno
, u32 flags
, bool retried
)
114 const struct hash_ipportip4
*h
= set
->data
;
115 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
116 struct hash_ipportip4_elem e
= { .ip
= 0 };
117 struct ip_set_ext ext
= IP_SET_INIT_UEXT(set
);
118 u32 ip
, ip_to
= 0, p
= 0, port
, port_to
;
119 bool with_ports
= false;
122 if (tb
[IPSET_ATTR_LINENO
])
123 *lineno
= nla_get_u32(tb
[IPSET_ATTR_LINENO
]);
125 if (unlikely(!tb
[IPSET_ATTR_IP
] || !tb
[IPSET_ATTR_IP2
] ||
126 !ip_set_attr_netorder(tb
, IPSET_ATTR_PORT
) ||
127 !ip_set_optattr_netorder(tb
, IPSET_ATTR_PORT_TO
)))
128 return -IPSET_ERR_PROTOCOL
;
130 ret
= ip_set_get_ipaddr4(tb
[IPSET_ATTR_IP
], &e
.ip
);
134 ret
= ip_set_get_extensions(set
, tb
, &ext
);
138 ret
= ip_set_get_ipaddr4(tb
[IPSET_ATTR_IP2
], &e
.ip2
);
142 e
.port
= nla_get_be16(tb
[IPSET_ATTR_PORT
]);
144 if (tb
[IPSET_ATTR_PROTO
]) {
145 e
.proto
= nla_get_u8(tb
[IPSET_ATTR_PROTO
]);
146 with_ports
= ip_set_proto_with_ports(e
.proto
);
149 return -IPSET_ERR_INVALID_PROTO
;
151 return -IPSET_ERR_MISSING_PROTO
;
154 if (!(with_ports
|| e
.proto
== IPPROTO_ICMP
))
157 if (adt
== IPSET_TEST
||
158 !(tb
[IPSET_ATTR_IP_TO
] || tb
[IPSET_ATTR_CIDR
] ||
159 tb
[IPSET_ATTR_PORT_TO
])) {
160 ret
= adtfn(set
, &e
, &ext
, &ext
, flags
);
161 return ip_set_eexist(ret
, flags
) ? 0 : ret
;
164 ip_to
= ip
= ntohl(e
.ip
);
165 if (tb
[IPSET_ATTR_IP_TO
]) {
166 ret
= ip_set_get_hostipaddr4(tb
[IPSET_ATTR_IP_TO
], &ip_to
);
171 } else if (tb
[IPSET_ATTR_CIDR
]) {
172 u8 cidr
= nla_get_u8(tb
[IPSET_ATTR_CIDR
]);
174 if (!cidr
|| cidr
> HOST_MASK
)
175 return -IPSET_ERR_INVALID_CIDR
;
176 ip_set_mask_from_to(ip
, ip_to
, cidr
);
179 port_to
= port
= ntohs(e
.port
);
180 if (with_ports
&& tb
[IPSET_ATTR_PORT_TO
]) {
181 port_to
= ip_set_get_h16(tb
[IPSET_ATTR_PORT_TO
]);
187 ip
= ntohl(h
->next
.ip
);
188 for (; ip
<= ip_to
; ip
++) {
189 p
= retried
&& ip
== ntohl(h
->next
.ip
) ? ntohs(h
->next
.port
)
191 for (; p
<= port_to
; p
++) {
194 ret
= adtfn(set
, &e
, &ext
, &ext
, flags
);
196 if (ret
&& !ip_set_eexist(ret
, flags
))
207 struct hash_ipportip6_elem
{
208 union nf_inet_addr ip
;
209 union nf_inet_addr ip2
;
215 /* Common functions */
218 hash_ipportip6_data_equal(const struct hash_ipportip6_elem
*ip1
,
219 const struct hash_ipportip6_elem
*ip2
,
222 return ipv6_addr_equal(&ip1
->ip
.in6
, &ip2
->ip
.in6
) &&
223 ipv6_addr_equal(&ip1
->ip2
.in6
, &ip2
->ip2
.in6
) &&
224 ip1
->port
== ip2
->port
&&
225 ip1
->proto
== ip2
->proto
;
229 hash_ipportip6_data_list(struct sk_buff
*skb
,
230 const struct hash_ipportip6_elem
*data
)
232 if (nla_put_ipaddr6(skb
, IPSET_ATTR_IP
, &data
->ip
.in6
) ||
233 nla_put_ipaddr6(skb
, IPSET_ATTR_IP2
, &data
->ip2
.in6
) ||
234 nla_put_net16(skb
, IPSET_ATTR_PORT
, data
->port
) ||
235 nla_put_u8(skb
, IPSET_ATTR_PROTO
, data
->proto
))
236 goto nla_put_failure
;
244 hash_ipportip6_data_next(struct hash_ipportip6_elem
*next
,
245 const struct hash_ipportip6_elem
*d
)
247 next
->port
= d
->port
;
253 #define MTYPE hash_ipportip6
254 #define HOST_MASK 128
255 #define IP_SET_EMIT_CREATE
256 #include "ip_set_hash_gen.h"
259 hash_ipportip6_kadt(struct ip_set
*set
, const struct sk_buff
*skb
,
260 const struct xt_action_param
*par
,
261 enum ipset_adt adt
, struct ip_set_adt_opt
*opt
)
263 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
264 struct hash_ipportip6_elem e
= { .ip
= { .all
= { 0 } } };
265 struct ip_set_ext ext
= IP_SET_INIT_KEXT(skb
, opt
, set
);
267 if (!ip_set_get_ip6_port(skb
, opt
->flags
& IPSET_DIM_TWO_SRC
,
271 ip6addrptr(skb
, opt
->flags
& IPSET_DIM_ONE_SRC
, &e
.ip
.in6
);
272 ip6addrptr(skb
, opt
->flags
& IPSET_DIM_THREE_SRC
, &e
.ip2
.in6
);
273 return adtfn(set
, &e
, &ext
, &opt
->ext
, opt
->cmdflags
);
277 hash_ipportip6_uadt(struct ip_set
*set
, struct nlattr
*tb
[],
278 enum ipset_adt adt
, u32
*lineno
, u32 flags
, bool retried
)
280 const struct hash_ipportip6
*h
= set
->data
;
281 ipset_adtfn adtfn
= set
->variant
->adt
[adt
];
282 struct hash_ipportip6_elem e
= { .ip
= { .all
= { 0 } } };
283 struct ip_set_ext ext
= IP_SET_INIT_UEXT(set
);
285 bool with_ports
= false;
288 if (tb
[IPSET_ATTR_LINENO
])
289 *lineno
= nla_get_u32(tb
[IPSET_ATTR_LINENO
]);
291 if (unlikely(!tb
[IPSET_ATTR_IP
] || !tb
[IPSET_ATTR_IP2
] ||
292 !ip_set_attr_netorder(tb
, IPSET_ATTR_PORT
) ||
293 !ip_set_optattr_netorder(tb
, IPSET_ATTR_PORT_TO
)))
294 return -IPSET_ERR_PROTOCOL
;
295 if (unlikely(tb
[IPSET_ATTR_IP_TO
]))
296 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED
;
297 if (unlikely(tb
[IPSET_ATTR_CIDR
])) {
298 u8 cidr
= nla_get_u8(tb
[IPSET_ATTR_CIDR
]);
300 if (cidr
!= HOST_MASK
)
301 return -IPSET_ERR_INVALID_CIDR
;
304 ret
= ip_set_get_ipaddr6(tb
[IPSET_ATTR_IP
], &e
.ip
);
308 ret
= ip_set_get_extensions(set
, tb
, &ext
);
312 ret
= ip_set_get_ipaddr6(tb
[IPSET_ATTR_IP2
], &e
.ip2
);
316 e
.port
= nla_get_be16(tb
[IPSET_ATTR_PORT
]);
318 if (tb
[IPSET_ATTR_PROTO
]) {
319 e
.proto
= nla_get_u8(tb
[IPSET_ATTR_PROTO
]);
320 with_ports
= ip_set_proto_with_ports(e
.proto
);
323 return -IPSET_ERR_INVALID_PROTO
;
325 return -IPSET_ERR_MISSING_PROTO
;
328 if (!(with_ports
|| e
.proto
== IPPROTO_ICMPV6
))
331 if (adt
== IPSET_TEST
|| !with_ports
|| !tb
[IPSET_ATTR_PORT_TO
]) {
332 ret
= adtfn(set
, &e
, &ext
, &ext
, flags
);
333 return ip_set_eexist(ret
, flags
) ? 0 : ret
;
336 port
= ntohs(e
.port
);
337 port_to
= ip_set_get_h16(tb
[IPSET_ATTR_PORT_TO
]);
342 port
= ntohs(h
->next
.port
);
343 for (; port
<= port_to
; port
++) {
344 e
.port
= htons(port
);
345 ret
= adtfn(set
, &e
, &ext
, &ext
, flags
);
347 if (ret
&& !ip_set_eexist(ret
, flags
))
355 static struct ip_set_type hash_ipportip_type __read_mostly
= {
356 .name
= "hash:ip,port,ip",
357 .protocol
= IPSET_PROTOCOL
,
358 .features
= IPSET_TYPE_IP
| IPSET_TYPE_PORT
| IPSET_TYPE_IP2
,
359 .dimension
= IPSET_DIM_THREE
,
360 .family
= NFPROTO_UNSPEC
,
361 .revision_min
= IPSET_TYPE_REV_MIN
,
362 .revision_max
= IPSET_TYPE_REV_MAX
,
363 .create
= hash_ipportip_create
,
365 [IPSET_ATTR_HASHSIZE
] = { .type
= NLA_U32
},
366 [IPSET_ATTR_MAXELEM
] = { .type
= NLA_U32
},
367 [IPSET_ATTR_PROBES
] = { .type
= NLA_U8
},
368 [IPSET_ATTR_RESIZE
] = { .type
= NLA_U8
},
369 [IPSET_ATTR_TIMEOUT
] = { .type
= NLA_U32
},
370 [IPSET_ATTR_CADT_FLAGS
] = { .type
= NLA_U32
},
373 [IPSET_ATTR_IP
] = { .type
= NLA_NESTED
},
374 [IPSET_ATTR_IP_TO
] = { .type
= NLA_NESTED
},
375 [IPSET_ATTR_IP2
] = { .type
= NLA_NESTED
},
376 [IPSET_ATTR_PORT
] = { .type
= NLA_U16
},
377 [IPSET_ATTR_PORT_TO
] = { .type
= NLA_U16
},
378 [IPSET_ATTR_CIDR
] = { .type
= NLA_U8
},
379 [IPSET_ATTR_PROTO
] = { .type
= NLA_U8
},
380 [IPSET_ATTR_TIMEOUT
] = { .type
= NLA_U32
},
381 [IPSET_ATTR_LINENO
] = { .type
= NLA_U32
},
382 [IPSET_ATTR_BYTES
] = { .type
= NLA_U64
},
383 [IPSET_ATTR_PACKETS
] = { .type
= NLA_U64
},
384 [IPSET_ATTR_COMMENT
] = { .type
= NLA_NUL_STRING
,
385 .len
= IPSET_MAX_COMMENT_SIZE
},
386 [IPSET_ATTR_SKBMARK
] = { .type
= NLA_U64
},
387 [IPSET_ATTR_SKBPRIO
] = { .type
= NLA_U32
},
388 [IPSET_ATTR_SKBQUEUE
] = { .type
= NLA_U16
},
394 hash_ipportip_init(void)
396 return ip_set_type_register(&hash_ipportip_type
);
400 hash_ipportip_fini(void)
403 ip_set_type_unregister(&hash_ipportip_type
);
406 module_init(hash_ipportip_init
);
407 module_exit(hash_ipportip_fini
);