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 | |
Jozsef Kadlecsik | 10111a6 | 2012-09-21 21:59:32 +0200 | [diff] [blame] | 26 | #define REVISION_MIN 0 |
| 27 | /* 1 Range as input support for IPv4 added */ |
| 28 | #define REVISION_MAX 2 /* nomatch flag support added */ |
| 29 | |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 30 | MODULE_LICENSE("GPL"); |
| 31 | MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>"); |
Jozsef Kadlecsik | 10111a6 | 2012-09-21 21:59:32 +0200 | [diff] [blame] | 32 | IP_SET_MODULE_DESC("hash:net", REVISION_MIN, REVISION_MAX); |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 33 | MODULE_ALIAS("ip_set_hash:net"); |
| 34 | |
| 35 | /* Type specific function prefix */ |
| 36 | #define TYPE hash_net |
| 37 | |
| 38 | static bool |
| 39 | hash_net_same_set(const struct ip_set *a, const struct ip_set *b); |
| 40 | |
| 41 | #define hash_net4_same_set hash_net_same_set |
| 42 | #define hash_net6_same_set hash_net_same_set |
| 43 | |
| 44 | /* The type variant functions: IPv4 */ |
| 45 | |
| 46 | /* Member elements without timeout */ |
| 47 | struct hash_net4_elem { |
| 48 | __be32 ip; |
| 49 | u16 padding0; |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 50 | u8 nomatch; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 51 | u8 cidr; |
| 52 | }; |
| 53 | |
| 54 | /* Member elements with timeout support */ |
| 55 | struct hash_net4_telem { |
| 56 | __be32 ip; |
| 57 | u16 padding0; |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 58 | u8 nomatch; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 59 | u8 cidr; |
| 60 | unsigned long timeout; |
| 61 | }; |
| 62 | |
| 63 | static inline bool |
| 64 | hash_net4_data_equal(const struct hash_net4_elem *ip1, |
Jozsef Kadlecsik | 89dc79b | 2011-07-21 12:06:18 +0200 | [diff] [blame] | 65 | const struct hash_net4_elem *ip2, |
| 66 | u32 *multi) |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 67 | { |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 68 | return ip1->ip == ip2->ip && |
| 69 | ip1->cidr == ip2->cidr; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 70 | } |
| 71 | |
| 72 | static inline bool |
| 73 | hash_net4_data_isnull(const struct hash_net4_elem *elem) |
| 74 | { |
| 75 | return elem->cidr == 0; |
| 76 | } |
| 77 | |
| 78 | static inline void |
| 79 | hash_net4_data_copy(struct hash_net4_elem *dst, |
| 80 | const struct hash_net4_elem *src) |
| 81 | { |
| 82 | dst->ip = src->ip; |
| 83 | dst->cidr = src->cidr; |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 84 | dst->nomatch = src->nomatch; |
| 85 | } |
| 86 | |
| 87 | static inline void |
| 88 | hash_net4_data_flags(struct hash_net4_elem *dst, u32 flags) |
| 89 | { |
| 90 | dst->nomatch = flags & IPSET_FLAG_NOMATCH; |
| 91 | } |
| 92 | |
Jozsef Kadlecsik | 3e0304a | 2012-09-21 22:02:36 +0200 | [diff] [blame] | 93 | static inline int |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 94 | hash_net4_data_match(const struct hash_net4_elem *elem) |
| 95 | { |
Jozsef Kadlecsik | 3e0304a | 2012-09-21 22:02:36 +0200 | [diff] [blame] | 96 | return elem->nomatch ? -ENOTEMPTY : 1; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | static inline void |
| 100 | hash_net4_data_netmask(struct hash_net4_elem *elem, u8 cidr) |
| 101 | { |
| 102 | elem->ip &= ip_set_netmask(cidr); |
| 103 | elem->cidr = cidr; |
| 104 | } |
| 105 | |
| 106 | /* Zero CIDR values cannot be stored */ |
| 107 | static inline void |
| 108 | hash_net4_data_zero_out(struct hash_net4_elem *elem) |
| 109 | { |
| 110 | elem->cidr = 0; |
| 111 | } |
| 112 | |
| 113 | static bool |
| 114 | hash_net4_data_list(struct sk_buff *skb, const struct hash_net4_elem *data) |
| 115 | { |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 116 | u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0; |
| 117 | |
David S. Miller | 7cf7899 | 2012-04-01 19:54:46 -0400 | [diff] [blame] | 118 | if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) || |
| 119 | nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr) || |
| 120 | (flags && |
| 121 | nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags)))) |
| 122 | goto nla_put_failure; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 123 | return 0; |
| 124 | |
| 125 | nla_put_failure: |
| 126 | return 1; |
| 127 | } |
| 128 | |
| 129 | static bool |
| 130 | hash_net4_data_tlist(struct sk_buff *skb, const struct hash_net4_elem *data) |
| 131 | { |
| 132 | const struct hash_net4_telem *tdata = |
| 133 | (const struct hash_net4_telem *)data; |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 134 | u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 135 | |
David S. Miller | 7cf7899 | 2012-04-01 19:54:46 -0400 | [diff] [blame] | 136 | if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, tdata->ip) || |
| 137 | nla_put_u8(skb, IPSET_ATTR_CIDR, tdata->cidr) || |
| 138 | nla_put_net32(skb, IPSET_ATTR_TIMEOUT, |
| 139 | htonl(ip_set_timeout_get(tdata->timeout))) || |
| 140 | (flags && |
| 141 | nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags)))) |
| 142 | goto nla_put_failure; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 143 | return 0; |
| 144 | |
| 145 | nla_put_failure: |
| 146 | return 1; |
| 147 | } |
| 148 | |
| 149 | #define IP_SET_HASH_WITH_NETS |
| 150 | |
| 151 | #define PF 4 |
| 152 | #define HOST_MASK 32 |
| 153 | #include <linux/netfilter/ipset/ip_set_ahash.h> |
| 154 | |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 155 | static inline void |
| 156 | hash_net4_data_next(struct ip_set_hash *h, |
| 157 | const struct hash_net4_elem *d) |
| 158 | { |
Jozsef Kadlecsik | 6e27c9b | 2012-09-21 21:44:58 +0200 | [diff] [blame] | 159 | h->next.ip = d->ip; |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 160 | } |
| 161 | |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 162 | static int |
| 163 | hash_net4_kadt(struct ip_set *set, const struct sk_buff *skb, |
Jozsef Kadlecsik | b66554c | 2011-06-16 18:56:47 +0200 | [diff] [blame] | 164 | const struct xt_action_param *par, |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 165 | enum ipset_adt adt, const struct ip_set_adt_opt *opt) |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 166 | { |
| 167 | const struct ip_set_hash *h = set->data; |
| 168 | ipset_adtfn adtfn = set->variant->adt[adt]; |
Jozsef Kadlecsik | 9b03a5e | 2011-06-16 18:58:20 +0200 | [diff] [blame] | 169 | struct hash_net4_elem data = { |
| 170 | .cidr = h->nets[0].cidr ? h->nets[0].cidr : HOST_MASK |
| 171 | }; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 172 | |
| 173 | if (data.cidr == 0) |
| 174 | return -EINVAL; |
| 175 | if (adt == IPSET_TEST) |
| 176 | data.cidr = HOST_MASK; |
| 177 | |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 178 | ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip); |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 179 | data.ip &= ip_set_netmask(data.cidr); |
| 180 | |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 181 | return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags); |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | static int |
| 185 | hash_net4_uadt(struct ip_set *set, struct nlattr *tb[], |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 186 | enum ipset_adt adt, u32 *lineno, u32 flags, bool retried) |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 187 | { |
| 188 | const struct ip_set_hash *h = set->data; |
| 189 | ipset_adtfn adtfn = set->variant->adt[adt]; |
| 190 | struct hash_net4_elem data = { .cidr = HOST_MASK }; |
| 191 | u32 timeout = h->timeout; |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 192 | u32 ip = 0, ip_to, last; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 193 | int ret; |
| 194 | |
| 195 | if (unlikely(!tb[IPSET_ATTR_IP] || |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 196 | !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) || |
| 197 | !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS))) |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 198 | return -IPSET_ERR_PROTOCOL; |
| 199 | |
| 200 | if (tb[IPSET_ATTR_LINENO]) |
| 201 | *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); |
| 202 | |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 203 | ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip); |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 204 | if (ret) |
| 205 | return ret; |
| 206 | |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 207 | if (tb[IPSET_ATTR_CIDR]) { |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 208 | data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]); |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 209 | if (!data.cidr || data.cidr > HOST_MASK) |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 210 | return -IPSET_ERR_INVALID_CIDR; |
| 211 | } |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 212 | |
| 213 | if (tb[IPSET_ATTR_TIMEOUT]) { |
| 214 | if (!with_timeout(h->timeout)) |
| 215 | return -IPSET_ERR_TIMEOUT; |
| 216 | timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); |
| 217 | } |
Jozsef Kadlecsik | 15b4d93 | 2011-06-16 19:01:26 +0200 | [diff] [blame] | 218 | |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 219 | if (tb[IPSET_ATTR_CADT_FLAGS] && adt == IPSET_ADD) { |
| 220 | u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]); |
| 221 | if (cadt_flags & IPSET_FLAG_NOMATCH) |
| 222 | flags |= (cadt_flags << 16); |
| 223 | } |
| 224 | |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 225 | if (adt == IPSET_TEST || !tb[IPSET_ATTR_IP_TO]) { |
| 226 | data.ip = htonl(ip & ip_set_hostmask(data.cidr)); |
| 227 | ret = adtfn(set, &data, timeout, flags); |
| 228 | return ip_set_eexist(ret, flags) ? 0 : ret; |
| 229 | } |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 230 | |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 231 | ip_to = ip; |
| 232 | if (tb[IPSET_ATTR_IP_TO]) { |
| 233 | ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to); |
| 234 | if (ret) |
| 235 | return ret; |
| 236 | if (ip_to < ip) |
| 237 | swap(ip, ip_to); |
| 238 | if (ip + UINT_MAX == ip_to) |
| 239 | return -IPSET_ERR_HASH_RANGE; |
| 240 | } |
| 241 | if (retried) |
Jozsef Kadlecsik | 6e27c9b | 2012-09-21 21:44:58 +0200 | [diff] [blame] | 242 | ip = ntohl(h->next.ip); |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 243 | while (!after(ip, ip_to)) { |
| 244 | data.ip = htonl(ip); |
| 245 | last = ip_set_range_to_cidr(ip, ip_to, &data.cidr); |
| 246 | ret = adtfn(set, &data, timeout, flags); |
| 247 | if (ret && !ip_set_eexist(ret, flags)) |
| 248 | return ret; |
| 249 | else |
| 250 | ret = 0; |
| 251 | ip = last + 1; |
| 252 | } |
| 253 | return ret; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | static bool |
| 257 | hash_net_same_set(const struct ip_set *a, const struct ip_set *b) |
| 258 | { |
| 259 | const struct ip_set_hash *x = a->data; |
| 260 | const struct ip_set_hash *y = b->data; |
| 261 | |
| 262 | /* Resizing changes htable_bits, so we ignore it */ |
| 263 | return x->maxelem == y->maxelem && |
| 264 | x->timeout == y->timeout; |
| 265 | } |
| 266 | |
| 267 | /* The type variant functions: IPv6 */ |
| 268 | |
| 269 | struct hash_net6_elem { |
| 270 | union nf_inet_addr ip; |
| 271 | u16 padding0; |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 272 | u8 nomatch; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 273 | u8 cidr; |
| 274 | }; |
| 275 | |
| 276 | struct hash_net6_telem { |
| 277 | union nf_inet_addr ip; |
| 278 | u16 padding0; |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 279 | u8 nomatch; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 280 | u8 cidr; |
| 281 | unsigned long timeout; |
| 282 | }; |
| 283 | |
| 284 | static inline bool |
| 285 | hash_net6_data_equal(const struct hash_net6_elem *ip1, |
Jozsef Kadlecsik | 89dc79b | 2011-07-21 12:06:18 +0200 | [diff] [blame] | 286 | const struct hash_net6_elem *ip2, |
| 287 | u32 *multi) |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 288 | { |
| 289 | return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 && |
| 290 | ip1->cidr == ip2->cidr; |
| 291 | } |
| 292 | |
| 293 | static inline bool |
| 294 | hash_net6_data_isnull(const struct hash_net6_elem *elem) |
| 295 | { |
| 296 | return elem->cidr == 0; |
| 297 | } |
| 298 | |
| 299 | static inline void |
| 300 | hash_net6_data_copy(struct hash_net6_elem *dst, |
| 301 | const struct hash_net6_elem *src) |
| 302 | { |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 303 | dst->ip.in6 = src->ip.in6; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 304 | dst->cidr = src->cidr; |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 305 | dst->nomatch = src->nomatch; |
| 306 | } |
| 307 | |
| 308 | static inline void |
| 309 | hash_net6_data_flags(struct hash_net6_elem *dst, u32 flags) |
| 310 | { |
| 311 | dst->nomatch = flags & IPSET_FLAG_NOMATCH; |
| 312 | } |
| 313 | |
Jozsef Kadlecsik | 3e0304a | 2012-09-21 22:02:36 +0200 | [diff] [blame] | 314 | static inline int |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 315 | hash_net6_data_match(const struct hash_net6_elem *elem) |
| 316 | { |
Jozsef Kadlecsik | 3e0304a | 2012-09-21 22:02:36 +0200 | [diff] [blame] | 317 | return elem->nomatch ? -ENOTEMPTY : 1; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 318 | } |
| 319 | |
| 320 | static inline void |
| 321 | hash_net6_data_zero_out(struct hash_net6_elem *elem) |
| 322 | { |
| 323 | elem->cidr = 0; |
| 324 | } |
| 325 | |
| 326 | static inline void |
| 327 | ip6_netmask(union nf_inet_addr *ip, u8 prefix) |
| 328 | { |
| 329 | ip->ip6[0] &= ip_set_netmask6(prefix)[0]; |
| 330 | ip->ip6[1] &= ip_set_netmask6(prefix)[1]; |
| 331 | ip->ip6[2] &= ip_set_netmask6(prefix)[2]; |
| 332 | ip->ip6[3] &= ip_set_netmask6(prefix)[3]; |
| 333 | } |
| 334 | |
| 335 | static inline void |
| 336 | hash_net6_data_netmask(struct hash_net6_elem *elem, u8 cidr) |
| 337 | { |
| 338 | ip6_netmask(&elem->ip, cidr); |
| 339 | elem->cidr = cidr; |
| 340 | } |
| 341 | |
| 342 | static bool |
| 343 | hash_net6_data_list(struct sk_buff *skb, const struct hash_net6_elem *data) |
| 344 | { |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 345 | u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0; |
| 346 | |
David S. Miller | 7cf7899 | 2012-04-01 19:54:46 -0400 | [diff] [blame] | 347 | if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) || |
| 348 | nla_put_u8(skb, IPSET_ATTR_CIDR, data->cidr) || |
| 349 | (flags && |
| 350 | nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags)))) |
| 351 | goto nla_put_failure; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 352 | return 0; |
| 353 | |
| 354 | nla_put_failure: |
| 355 | return 1; |
| 356 | } |
| 357 | |
| 358 | static bool |
| 359 | hash_net6_data_tlist(struct sk_buff *skb, const struct hash_net6_elem *data) |
| 360 | { |
| 361 | const struct hash_net6_telem *e = |
| 362 | (const struct hash_net6_telem *)data; |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 363 | u32 flags = data->nomatch ? IPSET_FLAG_NOMATCH : 0; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 364 | |
David S. Miller | 7cf7899 | 2012-04-01 19:54:46 -0400 | [diff] [blame] | 365 | if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &e->ip.in6) || |
| 366 | nla_put_u8(skb, IPSET_ATTR_CIDR, e->cidr) || |
| 367 | nla_put_net32(skb, IPSET_ATTR_TIMEOUT, |
| 368 | htonl(ip_set_timeout_get(e->timeout))) || |
| 369 | (flags && |
| 370 | nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(flags)))) |
| 371 | goto nla_put_failure; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 372 | return 0; |
| 373 | |
| 374 | nla_put_failure: |
| 375 | return 1; |
| 376 | } |
| 377 | |
| 378 | #undef PF |
| 379 | #undef HOST_MASK |
| 380 | |
| 381 | #define PF 6 |
| 382 | #define HOST_MASK 128 |
| 383 | #include <linux/netfilter/ipset/ip_set_ahash.h> |
| 384 | |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 385 | static inline void |
| 386 | hash_net6_data_next(struct ip_set_hash *h, |
| 387 | const struct hash_net6_elem *d) |
| 388 | { |
| 389 | } |
| 390 | |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 391 | static int |
| 392 | hash_net6_kadt(struct ip_set *set, const struct sk_buff *skb, |
Jozsef Kadlecsik | b66554c | 2011-06-16 18:56:47 +0200 | [diff] [blame] | 393 | const struct xt_action_param *par, |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 394 | enum ipset_adt adt, const struct ip_set_adt_opt *opt) |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 395 | { |
| 396 | const struct ip_set_hash *h = set->data; |
| 397 | ipset_adtfn adtfn = set->variant->adt[adt]; |
Jozsef Kadlecsik | 9b03a5e | 2011-06-16 18:58:20 +0200 | [diff] [blame] | 398 | struct hash_net6_elem data = { |
| 399 | .cidr = h->nets[0].cidr ? h->nets[0].cidr : HOST_MASK |
| 400 | }; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 401 | |
| 402 | if (data.cidr == 0) |
| 403 | return -EINVAL; |
| 404 | if (adt == IPSET_TEST) |
| 405 | data.cidr = HOST_MASK; |
| 406 | |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 407 | ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip.in6); |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 408 | ip6_netmask(&data.ip, data.cidr); |
| 409 | |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 410 | return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags); |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 411 | } |
| 412 | |
| 413 | static int |
| 414 | hash_net6_uadt(struct ip_set *set, struct nlattr *tb[], |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 415 | enum ipset_adt adt, u32 *lineno, u32 flags, bool retried) |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 416 | { |
| 417 | const struct ip_set_hash *h = set->data; |
| 418 | ipset_adtfn adtfn = set->variant->adt[adt]; |
| 419 | struct hash_net6_elem data = { .cidr = HOST_MASK }; |
| 420 | u32 timeout = h->timeout; |
| 421 | int ret; |
| 422 | |
| 423 | if (unlikely(!tb[IPSET_ATTR_IP] || |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 424 | !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) || |
| 425 | !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS))) |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 426 | return -IPSET_ERR_PROTOCOL; |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 427 | if (unlikely(tb[IPSET_ATTR_IP_TO])) |
| 428 | return -IPSET_ERR_HASH_RANGE_UNSUPPORTED; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 429 | |
| 430 | if (tb[IPSET_ATTR_LINENO]) |
| 431 | *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); |
| 432 | |
| 433 | ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip); |
| 434 | if (ret) |
| 435 | return ret; |
| 436 | |
| 437 | if (tb[IPSET_ATTR_CIDR]) |
| 438 | data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]); |
| 439 | |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 440 | if (!data.cidr || data.cidr > HOST_MASK) |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 441 | return -IPSET_ERR_INVALID_CIDR; |
| 442 | |
| 443 | ip6_netmask(&data.ip, data.cidr); |
| 444 | |
| 445 | if (tb[IPSET_ATTR_TIMEOUT]) { |
| 446 | if (!with_timeout(h->timeout)) |
| 447 | return -IPSET_ERR_TIMEOUT; |
| 448 | timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); |
| 449 | } |
| 450 | |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 451 | if (tb[IPSET_ATTR_CADT_FLAGS] && adt == IPSET_ADD) { |
| 452 | u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]); |
| 453 | if (cadt_flags & IPSET_FLAG_NOMATCH) |
| 454 | flags |= (cadt_flags << 16); |
| 455 | } |
| 456 | |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 457 | ret = adtfn(set, &data, timeout, flags); |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 458 | |
| 459 | return ip_set_eexist(ret, flags) ? 0 : ret; |
| 460 | } |
| 461 | |
| 462 | /* Create hash:ip type of sets */ |
| 463 | |
| 464 | static int |
| 465 | hash_net_create(struct ip_set *set, struct nlattr *tb[], u32 flags) |
| 466 | { |
| 467 | u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM; |
| 468 | struct ip_set_hash *h; |
| 469 | u8 hbits; |
Jozsef Kadlecsik | 26a5d3c | 2012-05-14 01:47:01 +0000 | [diff] [blame] | 470 | size_t hsize; |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 471 | |
Jan Engelhardt | c15f1c8 | 2012-02-14 00:24:10 +0100 | [diff] [blame] | 472 | if (!(set->family == NFPROTO_IPV4 || set->family == NFPROTO_IPV6)) |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 473 | return -IPSET_ERR_INVALID_FAMILY; |
| 474 | |
| 475 | if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) || |
| 476 | !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) || |
| 477 | !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT))) |
| 478 | return -IPSET_ERR_PROTOCOL; |
| 479 | |
| 480 | if (tb[IPSET_ATTR_HASHSIZE]) { |
| 481 | hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]); |
| 482 | if (hashsize < IPSET_MIMINAL_HASHSIZE) |
| 483 | hashsize = IPSET_MIMINAL_HASHSIZE; |
| 484 | } |
| 485 | |
| 486 | if (tb[IPSET_ATTR_MAXELEM]) |
| 487 | maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]); |
| 488 | |
| 489 | h = kzalloc(sizeof(*h) |
| 490 | + sizeof(struct ip_set_hash_nets) |
Jan Engelhardt | c15f1c8 | 2012-02-14 00:24:10 +0100 | [diff] [blame] | 491 | * (set->family == NFPROTO_IPV4 ? 32 : 128), GFP_KERNEL); |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 492 | if (!h) |
| 493 | return -ENOMEM; |
| 494 | |
| 495 | h->maxelem = maxelem; |
| 496 | get_random_bytes(&h->initval, sizeof(h->initval)); |
| 497 | h->timeout = IPSET_NO_TIMEOUT; |
| 498 | |
| 499 | hbits = htable_bits(hashsize); |
Jozsef Kadlecsik | 26a5d3c | 2012-05-14 01:47:01 +0000 | [diff] [blame] | 500 | hsize = htable_size(hbits); |
| 501 | if (hsize == 0) { |
| 502 | kfree(h); |
| 503 | return -ENOMEM; |
| 504 | } |
| 505 | h->table = ip_set_alloc(hsize); |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 506 | if (!h->table) { |
| 507 | kfree(h); |
| 508 | return -ENOMEM; |
| 509 | } |
| 510 | h->table->htable_bits = hbits; |
| 511 | |
| 512 | set->data = h; |
| 513 | |
| 514 | if (tb[IPSET_ATTR_TIMEOUT]) { |
| 515 | h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); |
| 516 | |
Jan Engelhardt | c15f1c8 | 2012-02-14 00:24:10 +0100 | [diff] [blame] | 517 | set->variant = set->family == NFPROTO_IPV4 |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 518 | ? &hash_net4_tvariant : &hash_net6_tvariant; |
| 519 | |
Jan Engelhardt | c15f1c8 | 2012-02-14 00:24:10 +0100 | [diff] [blame] | 520 | if (set->family == NFPROTO_IPV4) |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 521 | hash_net4_gc_init(set); |
| 522 | else |
| 523 | hash_net6_gc_init(set); |
| 524 | } else { |
Jan Engelhardt | c15f1c8 | 2012-02-14 00:24:10 +0100 | [diff] [blame] | 525 | set->variant = set->family == NFPROTO_IPV4 |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 526 | ? &hash_net4_variant : &hash_net6_variant; |
| 527 | } |
| 528 | |
| 529 | pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n", |
| 530 | set->name, jhash_size(h->table->htable_bits), |
| 531 | h->table->htable_bits, h->maxelem, set->data, h->table); |
| 532 | |
| 533 | return 0; |
| 534 | } |
| 535 | |
| 536 | static struct ip_set_type hash_net_type __read_mostly = { |
| 537 | .name = "hash:net", |
| 538 | .protocol = IPSET_PROTOCOL, |
Jozsef Kadlecsik | 3e0304a | 2012-09-21 22:02:36 +0200 | [diff] [blame] | 539 | .features = IPSET_TYPE_IP | IPSET_TYPE_NOMATCH, |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 540 | .dimension = IPSET_DIM_ONE, |
Jan Engelhardt | c15f1c8 | 2012-02-14 00:24:10 +0100 | [diff] [blame] | 541 | .family = NFPROTO_UNSPEC, |
Jozsef Kadlecsik | 10111a6 | 2012-09-21 21:59:32 +0200 | [diff] [blame] | 542 | .revision_min = REVISION_MIN, |
| 543 | .revision_max = REVISION_MAX, |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 544 | .create = hash_net_create, |
| 545 | .create_policy = { |
| 546 | [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 }, |
| 547 | [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 }, |
| 548 | [IPSET_ATTR_PROBES] = { .type = NLA_U8 }, |
| 549 | [IPSET_ATTR_RESIZE] = { .type = NLA_U8 }, |
| 550 | [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, |
| 551 | }, |
| 552 | .adt_policy = { |
| 553 | [IPSET_ATTR_IP] = { .type = NLA_NESTED }, |
Jozsef Kadlecsik | d0d9e0a | 2011-06-16 18:52:41 +0200 | [diff] [blame] | 554 | [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED }, |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 555 | [IPSET_ATTR_CIDR] = { .type = NLA_U8 }, |
| 556 | [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, |
Jozsef Kadlecsik | 2a7cef2 | 2012-01-14 17:16:36 +0100 | [diff] [blame] | 557 | [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 }, |
Jozsef Kadlecsik | b383702 | 2011-02-01 15:52:54 +0100 | [diff] [blame] | 558 | }, |
| 559 | .me = THIS_MODULE, |
| 560 | }; |
| 561 | |
| 562 | static int __init |
| 563 | hash_net_init(void) |
| 564 | { |
| 565 | return ip_set_type_register(&hash_net_type); |
| 566 | } |
| 567 | |
| 568 | static void __exit |
| 569 | hash_net_fini(void) |
| 570 | { |
| 571 | ip_set_type_unregister(&hash_net_type); |
| 572 | } |
| 573 | |
| 574 | module_init(hash_net_init); |
| 575 | module_exit(hash_net_fini); |