1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@netfilter.org> */
4 /* Kernel module implementing an IP set type: the hash:ip,port type */
6 #include <linux/jhash.h>
7 #include <linux/module.h>
9 #include <linux/skbuff.h>
10 #include <linux/errno.h>
11 #include <linux/random.h>
14 #include <net/netlink.h>
17 #include <linux/netfilter.h>
18 #include <linux/netfilter/ipset/pfxlen.h>
19 #include <linux/netfilter/ipset/ip_set.h>
20 #include <linux/netfilter/ipset/ip_set_getport.h>
21 #include <linux/netfilter/ipset/ip_set_hash.h>
23 #define IPSET_TYPE_REV_MIN 0
24 /* 1 SCTP and UDPLITE support added */
25 /* 2 Counters support added */
26 /* 3 Comments support added */
27 /* 4 Forceadd support added */
28 /* 5 skbinfo support added */
29 #define IPSET_TYPE_REV_MAX 6 /* bucketsize, initval support added */
31 MODULE_LICENSE("GPL");
32 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@netfilter.org>");
33 IP_SET_MODULE_DESC("hash:ip,port", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
34 MODULE_ALIAS("ip_set_hash:ip,port");
36 /* Type specific function prefix */
37 #define HTYPE hash_ipport
42 struct hash_ipport4_elem {
49 /* Common functions */
52 hash_ipport4_data_equal(const struct hash_ipport4_elem *ip1,
53 const struct hash_ipport4_elem *ip2,
56 return ip1->ip == ip2->ip &&
57 ip1->port == ip2->port &&
58 ip1->proto == ip2->proto;
62 hash_ipport4_data_list(struct sk_buff *skb,
63 const struct hash_ipport4_elem *data)
65 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
66 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
67 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
76 hash_ipport4_data_next(struct hash_ipport4_elem *next,
77 const struct hash_ipport4_elem *d)
83 #define MTYPE hash_ipport4
85 #include "ip_set_hash_gen.h"
88 hash_ipport4_kadt(struct ip_set *set, const struct sk_buff *skb,
89 const struct xt_action_param *par,
90 enum ipset_adt adt, struct ip_set_adt_opt *opt)
92 ipset_adtfn adtfn = set->variant->adt[adt];
93 struct hash_ipport4_elem e = { .ip = 0 };
94 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
96 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
100 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
101 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
105 hash_ipport4_uadt(struct ip_set *set, struct nlattr *tb[],
106 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
108 struct hash_ipport4 *h = set->data;
109 ipset_adtfn adtfn = set->variant->adt[adt];
110 struct hash_ipport4_elem e = { .ip = 0 };
111 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
112 u32 ip, ip_to = 0, p = 0, port, port_to, i = 0;
113 bool with_ports = false;
116 if (tb[IPSET_ATTR_LINENO])
117 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
119 if (unlikely(!tb[IPSET_ATTR_IP] ||
120 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
121 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO)))
122 return -IPSET_ERR_PROTOCOL;
124 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip);
128 ret = ip_set_get_extensions(set, tb, &ext);
132 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
134 if (tb[IPSET_ATTR_PROTO]) {
135 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
136 with_ports = ip_set_proto_with_ports(e.proto);
139 return -IPSET_ERR_INVALID_PROTO;
141 return -IPSET_ERR_MISSING_PROTO;
144 if (!(with_ports || e.proto == IPPROTO_ICMP))
147 if (adt == IPSET_TEST ||
148 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
149 tb[IPSET_ATTR_PORT_TO])) {
150 ret = adtfn(set, &e, &ext, &ext, flags);
151 return ip_set_eexist(ret, flags) ? 0 : ret;
154 ip_to = ip = ntohl(e.ip);
155 if (tb[IPSET_ATTR_IP_TO]) {
156 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
161 } else if (tb[IPSET_ATTR_CIDR]) {
162 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
164 if (!cidr || cidr > HOST_MASK)
165 return -IPSET_ERR_INVALID_CIDR;
166 ip_set_mask_from_to(ip, ip_to, cidr);
169 port_to = port = ntohs(e.port);
170 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
171 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
177 ip = ntohl(h->next.ip);
178 for (; ip <= ip_to; ip++) {
179 p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
181 for (; p <= port_to; p++, i++) {
184 if (i > IPSET_MAX_RANGE) {
185 hash_ipport4_data_next(&h->next, &e);
188 ret = adtfn(set, &e, &ext, &ext, flags);
190 if (ret && !ip_set_eexist(ret, flags))
201 struct hash_ipport6_elem {
202 union nf_inet_addr ip;
208 /* Common functions */
211 hash_ipport6_data_equal(const struct hash_ipport6_elem *ip1,
212 const struct hash_ipport6_elem *ip2,
215 return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
216 ip1->port == ip2->port &&
217 ip1->proto == ip2->proto;
221 hash_ipport6_data_list(struct sk_buff *skb,
222 const struct hash_ipport6_elem *data)
224 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
225 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
226 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
227 goto nla_put_failure;
235 hash_ipport6_data_next(struct hash_ipport6_elem *next,
236 const struct hash_ipport6_elem *d)
238 next->port = d->port;
244 #define MTYPE hash_ipport6
245 #define HOST_MASK 128
246 #define IP_SET_EMIT_CREATE
247 #include "ip_set_hash_gen.h"
250 hash_ipport6_kadt(struct ip_set *set, const struct sk_buff *skb,
251 const struct xt_action_param *par,
252 enum ipset_adt adt, struct ip_set_adt_opt *opt)
254 ipset_adtfn adtfn = set->variant->adt[adt];
255 struct hash_ipport6_elem e = { .ip = { .all = { 0 } } };
256 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
258 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
262 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
263 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
267 hash_ipport6_uadt(struct ip_set *set, struct nlattr *tb[],
268 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
270 const struct hash_ipport6 *h = set->data;
271 ipset_adtfn adtfn = set->variant->adt[adt];
272 struct hash_ipport6_elem e = { .ip = { .all = { 0 } } };
273 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
275 bool with_ports = false;
278 if (tb[IPSET_ATTR_LINENO])
279 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
281 if (unlikely(!tb[IPSET_ATTR_IP] ||
282 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
283 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO)))
284 return -IPSET_ERR_PROTOCOL;
285 if (unlikely(tb[IPSET_ATTR_IP_TO]))
286 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
287 if (unlikely(tb[IPSET_ATTR_CIDR])) {
288 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
290 if (cidr != HOST_MASK)
291 return -IPSET_ERR_INVALID_CIDR;
294 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip);
298 ret = ip_set_get_extensions(set, tb, &ext);
302 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
304 if (tb[IPSET_ATTR_PROTO]) {
305 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
306 with_ports = ip_set_proto_with_ports(e.proto);
309 return -IPSET_ERR_INVALID_PROTO;
311 return -IPSET_ERR_MISSING_PROTO;
314 if (!(with_ports || e.proto == IPPROTO_ICMPV6))
317 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
318 ret = adtfn(set, &e, &ext, &ext, flags);
319 return ip_set_eexist(ret, flags) ? 0 : ret;
322 port = ntohs(e.port);
323 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
328 port = ntohs(h->next.port);
329 for (; port <= port_to; port++) {
330 e.port = htons(port);
331 ret = adtfn(set, &e, &ext, &ext, flags);
333 if (ret && !ip_set_eexist(ret, flags))
341 static struct ip_set_type hash_ipport_type __read_mostly = {
342 .name = "hash:ip,port",
343 .protocol = IPSET_PROTOCOL,
344 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT,
345 .dimension = IPSET_DIM_TWO,
346 .family = NFPROTO_UNSPEC,
347 .revision_min = IPSET_TYPE_REV_MIN,
348 .revision_max = IPSET_TYPE_REV_MAX,
349 .create_flags[IPSET_TYPE_REV_MAX] = IPSET_CREATE_FLAG_BUCKETSIZE,
350 .create = hash_ipport_create,
352 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
353 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
354 [IPSET_ATTR_INITVAL] = { .type = NLA_U32 },
355 [IPSET_ATTR_BUCKETSIZE] = { .type = NLA_U8 },
356 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
357 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
358 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
359 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
362 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
363 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
364 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
365 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
366 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
367 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
368 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
369 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
370 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
371 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
372 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING,
373 .len = IPSET_MAX_COMMENT_SIZE },
374 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
375 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
376 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
382 hash_ipport_init(void)
384 return ip_set_type_register(&hash_ipport_type);
388 hash_ipport_fini(void)
391 ip_set_type_unregister(&hash_ipport_type);
394 module_init(hash_ipport_init);
395 module_exit(hash_ipport_fini);