Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 1 | /* Copyright (C) 2003-2011 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
| 2 | * |
| 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. |
| 6 | */ |
| 7 | |
| 8 | /* Kernel module implementing an IP set type: the hash:net type */ |
| 9 | |
| 10 | #include <linux/jhash.h> |
| 11 | #include <linux/module.h> |
| 12 | #include <linux/ip.h> |
| 13 | #include <linux/skbuff.h> |
| 14 | #include <linux/errno.h> |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 15 | #include <linux/random.h> |
| 16 | #include <net/ip.h> |
| 17 | #include <net/ipv6.h> |
| 18 | #include <net/netlink.h> |
| 19 | |
| 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_timeout.h> |
| 24 | #include <linux/netfilter/ipset/ip_set_hash.h> |
| 25 | |
| 26 | MODULE_LICENSE("GPL"); |
| 27 | MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>"); |
| 28 | MODULE_DESCRIPTION("hash:net type of IP sets"); |
| 29 | MODULE_ALIAS("ip_set_hash:net"); |
| 30 | |
| 31 | /* Type specific function prefix */ |
| 32 | #define TYPE hash_net |
| 33 | |
| 34 | static bool |
| 35 | hash_net_same_set(const struct ip_set *a, const struct ip_set *b); |
| 36 | |
| 37 | #define hash_net4_same_set hash_net_same_set |
| 38 | #define hash_net6_same_set hash_net_same_set |
| 39 | |
| 40 | /* The type variant functions: IPv4 */ |
| 41 | |
| 42 | /* Member elements without timeout */ |
| 43 | struct hash_net4_elem { |
| 44 | __be32 ip; |
| 45 | u16 padding0; |
| 46 | u8 padding1; |
| 47 | u8 cidr; |
| 48 | }; |
| 49 | |
| 50 | /* Member elements with timeout support */ |
| 51 | struct hash_net4_telem { |
| 52 | __be32 ip; |
| 53 | u16 padding0; |
| 54 | u8 padding1; |
| 55 | u8 cidr; |
| 56 | unsigned long timeout; |
| 57 | }; |
| 58 | |
| 59 | static inline bool |
| 60 | hash_net4_data_equal(const struct hash_net4_elem *ip1, |
Jozsef Kadlecsik | 89dc79b | 2011-07-21 12:06:18 +0200 | [diff] [blame] | 61 | const struct hash_net4_elem *ip2, |
| 62 | u32 *multi) |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 63 | { |
| 64 | return ip1->ip == ip2->ip && ip1->cidr == ip2->cidr; |
| 65 | } |
| 66 | |
| 67 | static inline bool |
| 68 | hash_net4_data_isnull(const struct hash_net4_elem *elem) |
| 69 | { |
| 70 | return elem->cidr == 0; |
| 71 | } |
| 72 | |
| 73 | static inline void |
| 74 | hash_net4_data_copy(struct hash_net4_elem *dst, |
| 75 | const struct hash_net4_elem *src) |
| 76 | { |
| 77 | dst->ip = src->ip; |
| 78 | dst->cidr = src->cidr; |
| 79 | } |
| 80 | |
| 81 | static inline void |
| 82 | hash_net4_data_netmask(struct hash_net4_elem *elem, u8 cidr) |
| 83 | { |
| 84 | elem->ip &= ip_set_netmask(cidr); |
| 85 | elem->cidr = cidr; |
| 86 | } |
| 87 | |
| 88 | /* Zero CIDR values cannot be stored */ |
| 89 | static inline void |
| 90 | hash_net4_data_zero_out(struct hash_net4_elem *elem) |
| 91 | { |
| 92 | elem->cidr = 0; |
| 93 | } |
| 94 | |
| 95 | static bool |
| 96 | hash_net4_data_list(struct sk_buff *skb, const struct hash_net4_elem *data) |
| 97 | { |
| 98 | NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, data->ip); |
| 99 | NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr); |
| 100 | return 0; |
| 101 | |
| 102 | nla_put_failure: |
| 103 | return 1; |
| 104 | } |
| 105 | |
| 106 | static bool |
| 107 | hash_net4_data_tlist(struct sk_buff *skb, const struct hash_net4_elem *data) |
| 108 | { |
| 109 | const struct hash_net4_telem *tdata = |
| 110 | (const struct hash_net4_telem *)data; |
| 111 | |
| 112 | NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, tdata->ip); |
| 113 | NLA_PUT_U8(skb, IPSET_ATTR_CIDR, tdata->cidr); |
| 114 | NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT, |
| 115 | htonl(ip_set_timeout_get(tdata->timeout))); |
| 116 | |
| 117 | return 0; |
| 118 | |
| 119 | nla_put_failure: |
| 120 | return 1; |
| 121 | } |
| 122 | |
| 123 | #define IP_SET_HASH_WITH_NETS |
| 124 | |
| 125 | #define PF 4 |
| 126 | #define HOST_MASK 32 |
| 127 | #include <linux/netfilter/ipset/ip_set_ahash.h> |
| 128 | |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 129 | static inline void |
| 130 | hash_net4_data_next(struct ip_set_hash *h, |
| 131 | const struct hash_net4_elem *d) |
| 132 | { |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 133 | h->next.ip = ntohl(d->ip); |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 134 | } |
| 135 | |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 136 | static int |
| 137 | hash_net4_kadt(struct ip_set *set, const struct sk_buff *skb, |
Jozsef Kadlecsik | b66554c | 2011-06-16 18:56:47 +0200 | [diff] [blame] | 138 | const struct xt_action_param *par, |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 139 | enum ipset_adt adt, const struct ip_set_adt_opt *opt) |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 140 | { |
| 141 | const struct ip_set_hash *h = set->data; |
| 142 | ipset_adtfn adtfn = set->variant->adt[adt]; |
Jozsef Kadlecsik | 9b03a5e | 2011-06-16 18:58:20 +0200 | [diff] [blame] | 143 | struct hash_net4_elem data = { |
| 144 | .cidr = h->nets[0].cidr ? h->nets[0].cidr : HOST_MASK |
| 145 | }; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 146 | |
| 147 | if (data.cidr == 0) |
| 148 | return -EINVAL; |
| 149 | if (adt == IPSET_TEST) |
| 150 | data.cidr = HOST_MASK; |
| 151 | |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 152 | ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip); |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 153 | data.ip &= ip_set_netmask(data.cidr); |
| 154 | |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 155 | return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags); |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 156 | } |
| 157 | |
| 158 | static int |
| 159 | hash_net4_uadt(struct ip_set *set, struct nlattr *tb[], |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 160 | enum ipset_adt adt, u32 *lineno, u32 flags, bool retried) |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 161 | { |
| 162 | const struct ip_set_hash *h = set->data; |
| 163 | ipset_adtfn adtfn = set->variant->adt[adt]; |
| 164 | struct hash_net4_elem data = { .cidr = HOST_MASK }; |
| 165 | u32 timeout = h->timeout; |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 166 | u32 ip = 0, ip_to, last; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 167 | int ret; |
| 168 | |
| 169 | if (unlikely(!tb[IPSET_ATTR_IP] || |
| 170 | !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT))) |
| 171 | return -IPSET_ERR_PROTOCOL; |
| 172 | |
| 173 | if (tb[IPSET_ATTR_LINENO]) |
| 174 | *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); |
| 175 | |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 176 | ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip); |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 177 | if (ret) |
| 178 | return ret; |
| 179 | |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 180 | if (tb[IPSET_ATTR_CIDR]) { |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 181 | data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]); |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 182 | if (!data.cidr) |
| 183 | return -IPSET_ERR_INVALID_CIDR; |
| 184 | } |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 185 | |
| 186 | if (tb[IPSET_ATTR_TIMEOUT]) { |
| 187 | if (!with_timeout(h->timeout)) |
| 188 | return -IPSET_ERR_TIMEOUT; |
| 189 | timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); |
| 190 | } |
Jozsef Kadlecsik | 15b4d93 | 2011-06-16 19:01:26 +0200 | [diff] [blame] | 191 | |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 192 | if (adt == IPSET_TEST || !tb[IPSET_ATTR_IP_TO]) { |
| 193 | data.ip = htonl(ip & ip_set_hostmask(data.cidr)); |
| 194 | ret = adtfn(set, &data, timeout, flags); |
| 195 | return ip_set_eexist(ret, flags) ? 0 : ret; |
| 196 | } |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 197 | |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 198 | ip_to = ip; |
| 199 | if (tb[IPSET_ATTR_IP_TO]) { |
| 200 | ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to); |
| 201 | if (ret) |
| 202 | return ret; |
| 203 | if (ip_to < ip) |
| 204 | swap(ip, ip_to); |
| 205 | if (ip + UINT_MAX == ip_to) |
| 206 | return -IPSET_ERR_HASH_RANGE; |
| 207 | } |
| 208 | if (retried) |
Jozsef Kadlecsik | 15b4d93 | 2011-06-16 19:01:26 +0200 | [diff] [blame] | 209 | ip = h->next.ip; |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 210 | while (!after(ip, ip_to)) { |
| 211 | data.ip = htonl(ip); |
| 212 | last = ip_set_range_to_cidr(ip, ip_to, &data.cidr); |
| 213 | ret = adtfn(set, &data, timeout, flags); |
| 214 | if (ret && !ip_set_eexist(ret, flags)) |
| 215 | return ret; |
| 216 | else |
| 217 | ret = 0; |
| 218 | ip = last + 1; |
| 219 | } |
| 220 | return ret; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | static bool |
| 224 | hash_net_same_set(const struct ip_set *a, const struct ip_set *b) |
| 225 | { |
| 226 | const struct ip_set_hash *x = a->data; |
| 227 | const struct ip_set_hash *y = b->data; |
| 228 | |
| 229 | /* Resizing changes htable_bits, so we ignore it */ |
| 230 | return x->maxelem == y->maxelem && |
| 231 | x->timeout == y->timeout; |
| 232 | } |
| 233 | |
| 234 | /* The type variant functions: IPv6 */ |
| 235 | |
| 236 | struct hash_net6_elem { |
| 237 | union nf_inet_addr ip; |
| 238 | u16 padding0; |
| 239 | u8 padding1; |
| 240 | u8 cidr; |
| 241 | }; |
| 242 | |
| 243 | struct hash_net6_telem { |
| 244 | union nf_inet_addr ip; |
| 245 | u16 padding0; |
| 246 | u8 padding1; |
| 247 | u8 cidr; |
| 248 | unsigned long timeout; |
| 249 | }; |
| 250 | |
| 251 | static inline bool |
| 252 | hash_net6_data_equal(const struct hash_net6_elem *ip1, |
Jozsef Kadlecsik | 89dc79b | 2011-07-21 12:06:18 +0200 | [diff] [blame] | 253 | const struct hash_net6_elem *ip2, |
| 254 | u32 *multi) |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 255 | { |
| 256 | return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 && |
| 257 | ip1->cidr == ip2->cidr; |
| 258 | } |
| 259 | |
| 260 | static inline bool |
| 261 | hash_net6_data_isnull(const struct hash_net6_elem *elem) |
| 262 | { |
| 263 | return elem->cidr == 0; |
| 264 | } |
| 265 | |
| 266 | static inline void |
| 267 | hash_net6_data_copy(struct hash_net6_elem *dst, |
| 268 | const struct hash_net6_elem *src) |
| 269 | { |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame^] | 270 | dst->ip.in6 = src->ip.in6; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 271 | dst->cidr = src->cidr; |
| 272 | } |
| 273 | |
| 274 | static inline void |
| 275 | hash_net6_data_zero_out(struct hash_net6_elem *elem) |
| 276 | { |
| 277 | elem->cidr = 0; |
| 278 | } |
| 279 | |
| 280 | static inline void |
| 281 | ip6_netmask(union nf_inet_addr *ip, u8 prefix) |
| 282 | { |
| 283 | ip->ip6[0] &= ip_set_netmask6(prefix)[0]; |
| 284 | ip->ip6[1] &= ip_set_netmask6(prefix)[1]; |
| 285 | ip->ip6[2] &= ip_set_netmask6(prefix)[2]; |
| 286 | ip->ip6[3] &= ip_set_netmask6(prefix)[3]; |
| 287 | } |
| 288 | |
| 289 | static inline void |
| 290 | hash_net6_data_netmask(struct hash_net6_elem *elem, u8 cidr) |
| 291 | { |
| 292 | ip6_netmask(&elem->ip, cidr); |
| 293 | elem->cidr = cidr; |
| 294 | } |
| 295 | |
| 296 | static bool |
| 297 | hash_net6_data_list(struct sk_buff *skb, const struct hash_net6_elem *data) |
| 298 | { |
| 299 | NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip); |
| 300 | NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr); |
| 301 | return 0; |
| 302 | |
| 303 | nla_put_failure: |
| 304 | return 1; |
| 305 | } |
| 306 | |
| 307 | static bool |
| 308 | hash_net6_data_tlist(struct sk_buff *skb, const struct hash_net6_elem *data) |
| 309 | { |
| 310 | const struct hash_net6_telem *e = |
| 311 | (const struct hash_net6_telem *)data; |
| 312 | |
| 313 | NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip); |
| 314 | NLA_PUT_U8(skb, IPSET_ATTR_CIDR, e->cidr); |
| 315 | NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT, |
| 316 | htonl(ip_set_timeout_get(e->timeout))); |
| 317 | return 0; |
| 318 | |
| 319 | nla_put_failure: |
| 320 | return 1; |
| 321 | } |
| 322 | |
| 323 | #undef PF |
| 324 | #undef HOST_MASK |
| 325 | |
| 326 | #define PF 6 |
| 327 | #define HOST_MASK 128 |
| 328 | #include <linux/netfilter/ipset/ip_set_ahash.h> |
| 329 | |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 330 | static inline void |
| 331 | hash_net6_data_next(struct ip_set_hash *h, |
| 332 | const struct hash_net6_elem *d) |
| 333 | { |
| 334 | } |
| 335 | |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 336 | static int |
| 337 | hash_net6_kadt(struct ip_set *set, const struct sk_buff *skb, |
Jozsef Kadlecsik | b66554c | 2011-06-16 18:56:47 +0200 | [diff] [blame] | 338 | const struct xt_action_param *par, |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 339 | enum ipset_adt adt, const struct ip_set_adt_opt *opt) |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 340 | { |
| 341 | const struct ip_set_hash *h = set->data; |
| 342 | ipset_adtfn adtfn = set->variant->adt[adt]; |
Jozsef Kadlecsik | 9b03a5e | 2011-06-16 18:58:20 +0200 | [diff] [blame] | 343 | struct hash_net6_elem data = { |
| 344 | .cidr = h->nets[0].cidr ? h->nets[0].cidr : HOST_MASK |
| 345 | }; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 346 | |
| 347 | if (data.cidr == 0) |
| 348 | return -EINVAL; |
| 349 | if (adt == IPSET_TEST) |
| 350 | data.cidr = HOST_MASK; |
| 351 | |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 352 | ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip.in6); |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 353 | ip6_netmask(&data.ip, data.cidr); |
| 354 | |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 355 | return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags); |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 356 | } |
| 357 | |
| 358 | static int |
| 359 | hash_net6_uadt(struct ip_set *set, struct nlattr *tb[], |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 360 | enum ipset_adt adt, u32 *lineno, u32 flags, bool retried) |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 361 | { |
| 362 | const struct ip_set_hash *h = set->data; |
| 363 | ipset_adtfn adtfn = set->variant->adt[adt]; |
| 364 | struct hash_net6_elem data = { .cidr = HOST_MASK }; |
| 365 | u32 timeout = h->timeout; |
| 366 | int ret; |
| 367 | |
| 368 | if (unlikely(!tb[IPSET_ATTR_IP] || |
| 369 | !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT))) |
| 370 | return -IPSET_ERR_PROTOCOL; |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 371 | if (unlikely(tb[IPSET_ATTR_IP_TO])) |
| 372 | return -IPSET_ERR_HASH_RANGE_UNSUPPORTED; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 373 | |
| 374 | if (tb[IPSET_ATTR_LINENO]) |
| 375 | *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); |
| 376 | |
| 377 | ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip); |
| 378 | if (ret) |
| 379 | return ret; |
| 380 | |
| 381 | if (tb[IPSET_ATTR_CIDR]) |
| 382 | data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]); |
| 383 | |
| 384 | if (!data.cidr) |
| 385 | return -IPSET_ERR_INVALID_CIDR; |
| 386 | |
| 387 | ip6_netmask(&data.ip, data.cidr); |
| 388 | |
| 389 | if (tb[IPSET_ATTR_TIMEOUT]) { |
| 390 | if (!with_timeout(h->timeout)) |
| 391 | return -IPSET_ERR_TIMEOUT; |
| 392 | timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); |
| 393 | } |
| 394 | |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 395 | ret = adtfn(set, &data, timeout, flags); |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 396 | |
| 397 | return ip_set_eexist(ret, flags) ? 0 : ret; |
| 398 | } |
| 399 | |
| 400 | /* Create hash:ip type of sets */ |
| 401 | |
| 402 | static int |
| 403 | hash_net_create(struct ip_set *set, struct nlattr *tb[], u32 flags) |
| 404 | { |
| 405 | u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM; |
| 406 | struct ip_set_hash *h; |
| 407 | u8 hbits; |
| 408 | |
| 409 | if (!(set->family == AF_INET || set->family == AF_INET6)) |
| 410 | return -IPSET_ERR_INVALID_FAMILY; |
| 411 | |
| 412 | if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) || |
| 413 | !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) || |
| 414 | !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT))) |
| 415 | return -IPSET_ERR_PROTOCOL; |
| 416 | |
| 417 | if (tb[IPSET_ATTR_HASHSIZE]) { |
| 418 | hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]); |
| 419 | if (hashsize < IPSET_MIMINAL_HASHSIZE) |
| 420 | hashsize = IPSET_MIMINAL_HASHSIZE; |
| 421 | } |
| 422 | |
| 423 | if (tb[IPSET_ATTR_MAXELEM]) |
| 424 | maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]); |
| 425 | |
| 426 | h = kzalloc(sizeof(*h) |
| 427 | + sizeof(struct ip_set_hash_nets) |
| 428 | * (set->family == AF_INET ? 32 : 128), GFP_KERNEL); |
| 429 | if (!h) |
| 430 | return -ENOMEM; |
| 431 | |
| 432 | h->maxelem = maxelem; |
| 433 | get_random_bytes(&h->initval, sizeof(h->initval)); |
| 434 | h->timeout = IPSET_NO_TIMEOUT; |
| 435 | |
| 436 | hbits = htable_bits(hashsize); |
| 437 | h->table = ip_set_alloc( |
| 438 | sizeof(struct htable) |
| 439 | + jhash_size(hbits) * sizeof(struct hbucket)); |
| 440 | if (!h->table) { |
| 441 | kfree(h); |
| 442 | return -ENOMEM; |
| 443 | } |
| 444 | h->table->htable_bits = hbits; |
| 445 | |
| 446 | set->data = h; |
| 447 | |
| 448 | if (tb[IPSET_ATTR_TIMEOUT]) { |
| 449 | h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); |
| 450 | |
| 451 | set->variant = set->family == AF_INET |
| 452 | ? &hash_net4_tvariant : &hash_net6_tvariant; |
| 453 | |
| 454 | if (set->family == AF_INET) |
| 455 | hash_net4_gc_init(set); |
| 456 | else |
| 457 | hash_net6_gc_init(set); |
| 458 | } else { |
| 459 | set->variant = set->family == AF_INET |
| 460 | ? &hash_net4_variant : &hash_net6_variant; |
| 461 | } |
| 462 | |
| 463 | pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n", |
| 464 | set->name, jhash_size(h->table->htable_bits), |
| 465 | h->table->htable_bits, h->maxelem, set->data, h->table); |
| 466 | |
| 467 | return 0; |
| 468 | } |
| 469 | |
| 470 | static struct ip_set_type hash_net_type __read_mostly = { |
| 471 | .name = "hash:net", |
| 472 | .protocol = IPSET_PROTOCOL, |
| 473 | .features = IPSET_TYPE_IP, |
| 474 | .dimension = IPSET_DIM_ONE, |
| 475 | .family = AF_UNSPEC, |
Jozsef Kadlecsik | f1e00b3 | 2011-06-16 18:51:41 +0200 | [diff] [blame] | 476 | .revision_min = 0, |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 477 | .revision_max = 1, /* Range as input support for IPv4 added */ |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 478 | .create = hash_net_create, |
| 479 | .create_policy = { |
| 480 | [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 }, |
| 481 | [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 }, |
| 482 | [IPSET_ATTR_PROBES] = { .type = NLA_U8 }, |
| 483 | [IPSET_ATTR_RESIZE] = { .type = NLA_U8 }, |
| 484 | [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, |
| 485 | }, |
| 486 | .adt_policy = { |
| 487 | [IPSET_ATTR_IP] = { .type = NLA_NESTED }, |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 488 | [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED }, |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 489 | [IPSET_ATTR_CIDR] = { .type = NLA_U8 }, |
| 490 | [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, |
| 491 | }, |
| 492 | .me = THIS_MODULE, |
| 493 | }; |
| 494 | |
| 495 | static int __init |
| 496 | hash_net_init(void) |
| 497 | { |
| 498 | return ip_set_type_register(&hash_net_type); |
| 499 | } |
| 500 | |
| 501 | static void __exit |
| 502 | hash_net_fini(void) |
| 503 | { |
| 504 | ip_set_type_unregister(&hash_net_type); |
| 505 | } |
| 506 | |
| 507 | module_init(hash_net_init); |
| 508 | module_exit(hash_net_fini); |