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 #define IPSET_TYPE_REV_MAX 5 /* skbinfo support added */
30 MODULE_LICENSE("GPL");
31 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@netfilter.org>");
32 IP_SET_MODULE_DESC("hash:ip,port", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
33 MODULE_ALIAS("ip_set_hash:ip,port");
35 /* Type specific function prefix */
36 #define HTYPE hash_ipport
41 struct hash_ipport4_elem {
48 /* Common functions */
51 hash_ipport4_data_equal(const struct hash_ipport4_elem *ip1,
52 const struct hash_ipport4_elem *ip2,
55 return ip1->ip == ip2->ip &&
56 ip1->port == ip2->port &&
57 ip1->proto == ip2->proto;
61 hash_ipport4_data_list(struct sk_buff *skb,
62 const struct hash_ipport4_elem *data)
64 if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
65 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
66 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
75 hash_ipport4_data_next(struct hash_ipport4_elem *next,
76 const struct hash_ipport4_elem *d)
82 #define MTYPE hash_ipport4
84 #include "ip_set_hash_gen.h"
87 hash_ipport4_kadt(struct ip_set *set, const struct sk_buff *skb,
88 const struct xt_action_param *par,
89 enum ipset_adt adt, struct ip_set_adt_opt *opt)
91 ipset_adtfn adtfn = set->variant->adt[adt];
92 struct hash_ipport4_elem e = { .ip = 0 };
93 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
95 if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
99 ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
100 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
104 hash_ipport4_uadt(struct ip_set *set, struct nlattr *tb[],
105 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
107 const struct hash_ipport4 *h = set->data;
108 ipset_adtfn adtfn = set->variant->adt[adt];
109 struct hash_ipport4_elem e = { .ip = 0 };
110 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
111 u32 ip, ip_to = 0, p = 0, port, port_to;
112 bool with_ports = false;
115 if (tb[IPSET_ATTR_LINENO])
116 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
118 if (unlikely(!tb[IPSET_ATTR_IP] ||
119 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
120 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO)))
121 return -IPSET_ERR_PROTOCOL;
123 ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip);
127 ret = ip_set_get_extensions(set, tb, &ext);
131 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
133 if (tb[IPSET_ATTR_PROTO]) {
134 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
135 with_ports = ip_set_proto_with_ports(e.proto);
138 return -IPSET_ERR_INVALID_PROTO;
140 return -IPSET_ERR_MISSING_PROTO;
143 if (!(with_ports || e.proto == IPPROTO_ICMP))
146 if (adt == IPSET_TEST ||
147 !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] ||
148 tb[IPSET_ATTR_PORT_TO])) {
149 ret = adtfn(set, &e, &ext, &ext, flags);
150 return ip_set_eexist(ret, flags) ? 0 : ret;
153 ip_to = ip = ntohl(e.ip);
154 if (tb[IPSET_ATTR_IP_TO]) {
155 ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
160 } else if (tb[IPSET_ATTR_CIDR]) {
161 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
163 if (!cidr || cidr > HOST_MASK)
164 return -IPSET_ERR_INVALID_CIDR;
165 ip_set_mask_from_to(ip, ip_to, cidr);
168 port_to = port = ntohs(e.port);
169 if (with_ports && tb[IPSET_ATTR_PORT_TO]) {
170 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
176 ip = ntohl(h->next.ip);
177 for (; ip <= ip_to; ip++) {
178 p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
180 for (; p <= port_to; p++) {
183 ret = adtfn(set, &e, &ext, &ext, flags);
185 if (ret && !ip_set_eexist(ret, flags))
196 struct hash_ipport6_elem {
197 union nf_inet_addr ip;
203 /* Common functions */
206 hash_ipport6_data_equal(const struct hash_ipport6_elem *ip1,
207 const struct hash_ipport6_elem *ip2,
210 return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
211 ip1->port == ip2->port &&
212 ip1->proto == ip2->proto;
216 hash_ipport6_data_list(struct sk_buff *skb,
217 const struct hash_ipport6_elem *data)
219 if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
220 nla_put_net16(skb, IPSET_ATTR_PORT, data->port) ||
221 nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto))
222 goto nla_put_failure;
230 hash_ipport6_data_next(struct hash_ipport6_elem *next,
231 const struct hash_ipport6_elem *d)
233 next->port = d->port;
239 #define MTYPE hash_ipport6
240 #define HOST_MASK 128
241 #define IP_SET_EMIT_CREATE
242 #include "ip_set_hash_gen.h"
245 hash_ipport6_kadt(struct ip_set *set, const struct sk_buff *skb,
246 const struct xt_action_param *par,
247 enum ipset_adt adt, struct ip_set_adt_opt *opt)
249 ipset_adtfn adtfn = set->variant->adt[adt];
250 struct hash_ipport6_elem e = { .ip = { .all = { 0 } } };
251 struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
253 if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC,
257 ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
258 return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
262 hash_ipport6_uadt(struct ip_set *set, struct nlattr *tb[],
263 enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
265 const struct hash_ipport6 *h = set->data;
266 ipset_adtfn adtfn = set->variant->adt[adt];
267 struct hash_ipport6_elem e = { .ip = { .all = { 0 } } };
268 struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
270 bool with_ports = false;
273 if (tb[IPSET_ATTR_LINENO])
274 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
276 if (unlikely(!tb[IPSET_ATTR_IP] ||
277 !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) ||
278 !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO)))
279 return -IPSET_ERR_PROTOCOL;
280 if (unlikely(tb[IPSET_ATTR_IP_TO]))
281 return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
282 if (unlikely(tb[IPSET_ATTR_CIDR])) {
283 u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
285 if (cidr != HOST_MASK)
286 return -IPSET_ERR_INVALID_CIDR;
289 ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip);
293 ret = ip_set_get_extensions(set, tb, &ext);
297 e.port = nla_get_be16(tb[IPSET_ATTR_PORT]);
299 if (tb[IPSET_ATTR_PROTO]) {
300 e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]);
301 with_ports = ip_set_proto_with_ports(e.proto);
304 return -IPSET_ERR_INVALID_PROTO;
306 return -IPSET_ERR_MISSING_PROTO;
309 if (!(with_ports || e.proto == IPPROTO_ICMPV6))
312 if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) {
313 ret = adtfn(set, &e, &ext, &ext, flags);
314 return ip_set_eexist(ret, flags) ? 0 : ret;
317 port = ntohs(e.port);
318 port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]);
323 port = ntohs(h->next.port);
324 for (; port <= port_to; port++) {
325 e.port = htons(port);
326 ret = adtfn(set, &e, &ext, &ext, flags);
328 if (ret && !ip_set_eexist(ret, flags))
336 static struct ip_set_type hash_ipport_type __read_mostly = {
337 .name = "hash:ip,port",
338 .protocol = IPSET_PROTOCOL,
339 .features = IPSET_TYPE_IP | IPSET_TYPE_PORT,
340 .dimension = IPSET_DIM_TWO,
341 .family = NFPROTO_UNSPEC,
342 .revision_min = IPSET_TYPE_REV_MIN,
343 .revision_max = IPSET_TYPE_REV_MAX,
344 .create = hash_ipport_create,
346 [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
347 [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
348 [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
349 [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
350 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
351 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
352 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
355 [IPSET_ATTR_IP] = { .type = NLA_NESTED },
356 [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
357 [IPSET_ATTR_PORT] = { .type = NLA_U16 },
358 [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 },
359 [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
360 [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
361 [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
362 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
363 [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
364 [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
365 [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING,
366 .len = IPSET_MAX_COMMENT_SIZE },
367 [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
368 [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
369 [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
375 hash_ipport_init(void)
377 return ip_set_type_register(&hash_ipport_type);
381 hash_ipport_fini(void)
384 ip_set_type_unregister(&hash_ipport_type);
387 module_init(hash_ipport_init);
388 module_exit(hash_ipport_fini);