Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1 | #ifndef _X_TABLES_H |
| 2 | #define _X_TABLES_H |
| 3 | |
| 4 | #define XT_FUNCTION_MAXNAMELEN 30 |
| 5 | #define XT_TABLE_MAXNAMELEN 32 |
| 6 | |
Dmitry Mishin | 1e30a01 | 2006-03-22 13:56:56 -0800 | [diff] [blame] | 7 | struct xt_entry_match |
| 8 | { |
| 9 | union { |
| 10 | struct { |
| 11 | u_int16_t match_size; |
| 12 | |
| 13 | /* Used by userspace */ |
| 14 | char name[XT_FUNCTION_MAXNAMELEN-1]; |
| 15 | |
| 16 | u_int8_t revision; |
| 17 | } user; |
| 18 | struct { |
| 19 | u_int16_t match_size; |
| 20 | |
| 21 | /* Used inside the kernel */ |
| 22 | struct xt_match *match; |
| 23 | } kernel; |
| 24 | |
| 25 | /* Total length */ |
| 26 | u_int16_t match_size; |
| 27 | } u; |
| 28 | |
| 29 | unsigned char data[0]; |
| 30 | }; |
| 31 | |
| 32 | struct xt_entry_target |
| 33 | { |
| 34 | union { |
| 35 | struct { |
| 36 | u_int16_t target_size; |
| 37 | |
| 38 | /* Used by userspace */ |
| 39 | char name[XT_FUNCTION_MAXNAMELEN-1]; |
| 40 | |
| 41 | u_int8_t revision; |
| 42 | } user; |
| 43 | struct { |
| 44 | u_int16_t target_size; |
| 45 | |
| 46 | /* Used inside the kernel */ |
| 47 | struct xt_target *target; |
| 48 | } kernel; |
| 49 | |
| 50 | /* Total length */ |
| 51 | u_int16_t target_size; |
| 52 | } u; |
| 53 | |
| 54 | unsigned char data[0]; |
| 55 | }; |
| 56 | |
Patrick McHardy | 3c2ad46 | 2007-05-10 14:14:16 -0700 | [diff] [blame] | 57 | #define XT_TARGET_INIT(__name, __size) \ |
| 58 | { \ |
| 59 | .target.u.user = { \ |
| 60 | .target_size = XT_ALIGN(__size), \ |
| 61 | .name = __name, \ |
| 62 | }, \ |
| 63 | } |
| 64 | |
Dmitry Mishin | 1e30a01 | 2006-03-22 13:56:56 -0800 | [diff] [blame] | 65 | struct xt_standard_target |
| 66 | { |
| 67 | struct xt_entry_target target; |
| 68 | int verdict; |
| 69 | }; |
| 70 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 71 | /* The argument to IPT_SO_GET_REVISION_*. Returns highest revision |
| 72 | * kernel supports, if >= revision. */ |
| 73 | struct xt_get_revision |
| 74 | { |
| 75 | char name[XT_FUNCTION_MAXNAMELEN-1]; |
| 76 | |
| 77 | u_int8_t revision; |
| 78 | }; |
| 79 | |
| 80 | /* CONTINUE verdict for targets */ |
| 81 | #define XT_CONTINUE 0xFFFFFFFF |
| 82 | |
| 83 | /* For standard target */ |
| 84 | #define XT_RETURN (-NF_REPEAT - 1) |
| 85 | |
David S. Miller | 6fbfc96 | 2006-01-20 11:57:07 -0800 | [diff] [blame] | 86 | /* this is a dummy structure to find out the alignment requirement for a struct |
| 87 | * containing all the fundamental data types that are used in ipt_entry, |
| 88 | * ip6t_entry and arpt_entry. This sucks, and it is a hack. It will be my |
| 89 | * personal pleasure to remove it -HW |
| 90 | */ |
| 91 | struct _xt_align |
| 92 | { |
| 93 | u_int8_t u8; |
| 94 | u_int16_t u16; |
| 95 | u_int32_t u32; |
| 96 | u_int64_t u64; |
| 97 | }; |
| 98 | |
| 99 | #define XT_ALIGN(s) (((s) + (__alignof__(struct _xt_align)-1)) \ |
| 100 | & ~(__alignof__(struct _xt_align)-1)) |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 101 | |
| 102 | /* Standard return verdict, or do jump. */ |
| 103 | #define XT_STANDARD_TARGET "" |
| 104 | /* Error verdict. */ |
| 105 | #define XT_ERROR_TARGET "ERROR" |
| 106 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 107 | #define SET_COUNTER(c,b,p) do { (c).bcnt = (b); (c).pcnt = (p); } while(0) |
| 108 | #define ADD_COUNTER(c,b,p) do { (c).bcnt += (b); (c).pcnt += (p); } while(0) |
| 109 | |
| 110 | struct xt_counters |
| 111 | { |
| 112 | u_int64_t pcnt, bcnt; /* Packet and byte counters */ |
| 113 | }; |
| 114 | |
| 115 | /* The argument to IPT_SO_ADD_COUNTERS. */ |
| 116 | struct xt_counters_info |
| 117 | { |
| 118 | /* Which table. */ |
| 119 | char name[XT_TABLE_MAXNAMELEN]; |
| 120 | |
| 121 | unsigned int num_counters; |
| 122 | |
| 123 | /* The counters (actually `number' of these). */ |
| 124 | struct xt_counters counters[0]; |
| 125 | }; |
| 126 | |
| 127 | #define XT_INV_PROTO 0x40 /* Invert the sense of PROTO. */ |
| 128 | |
| 129 | #ifdef __KERNEL__ |
| 130 | |
| 131 | #include <linux/netdevice.h> |
| 132 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 133 | struct xt_match |
| 134 | { |
| 135 | struct list_head list; |
| 136 | |
| 137 | const char name[XT_FUNCTION_MAXNAMELEN-1]; |
| 138 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 139 | /* Return true or false: return FALSE and set *hotdrop = 1 to |
| 140 | force immediate packet drop. */ |
| 141 | /* Arguments changed since 2.6.9, as this must now handle |
| 142 | non-linear skb, using skb_header_pointer and |
| 143 | skb_ip_make_writable. */ |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame^] | 144 | bool (*match)(const struct sk_buff *skb, |
| 145 | const struct net_device *in, |
| 146 | const struct net_device *out, |
| 147 | const struct xt_match *match, |
| 148 | const void *matchinfo, |
| 149 | int offset, |
| 150 | unsigned int protoff, |
| 151 | bool *hotdrop); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 152 | |
| 153 | /* Called when user tries to insert an entry of this type. */ |
| 154 | /* Should return true or false. */ |
| 155 | int (*checkentry)(const char *tablename, |
| 156 | const void *ip, |
Patrick McHardy | 1c52483 | 2006-03-20 18:02:15 -0800 | [diff] [blame] | 157 | const struct xt_match *match, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 158 | void *matchinfo, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 159 | unsigned int hook_mask); |
| 160 | |
| 161 | /* Called when entry of this type deleted. */ |
Patrick McHardy | efa7416 | 2006-08-22 00:36:37 -0700 | [diff] [blame] | 162 | void (*destroy)(const struct xt_match *match, void *matchinfo); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 163 | |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 164 | /* Called when userspace align differs from kernel space one */ |
Patrick McHardy | 9fa492c | 2006-09-20 12:05:37 -0700 | [diff] [blame] | 165 | void (*compat_from_user)(void *dst, void *src); |
| 166 | int (*compat_to_user)(void __user *dst, void *src); |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 167 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 168 | /* Set this to THIS_MODULE if you are a module, otherwise NULL */ |
| 169 | struct module *me; |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 170 | |
Patrick McHardy | 91270cf | 2006-08-22 00:43:38 -0700 | [diff] [blame] | 171 | /* Free to use by each match */ |
| 172 | unsigned long data; |
| 173 | |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 174 | char *table; |
| 175 | unsigned int matchsize; |
Patrick McHardy | 9fa492c | 2006-09-20 12:05:37 -0700 | [diff] [blame] | 176 | unsigned int compatsize; |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 177 | unsigned int hooks; |
| 178 | unsigned short proto; |
Patrick McHardy | c4b8851 | 2006-03-20 18:03:40 -0800 | [diff] [blame] | 179 | |
| 180 | unsigned short family; |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 181 | u_int8_t revision; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 182 | }; |
| 183 | |
| 184 | /* Registration hooks for targets. */ |
| 185 | struct xt_target |
| 186 | { |
| 187 | struct list_head list; |
| 188 | |
| 189 | const char name[XT_FUNCTION_MAXNAMELEN-1]; |
| 190 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 191 | /* Returns verdict. Argument order changed since 2.6.9, as this |
| 192 | must now handle non-linear skbs, using skb_copy_bits and |
| 193 | skb_ip_make_writable. */ |
| 194 | unsigned int (*target)(struct sk_buff **pskb, |
| 195 | const struct net_device *in, |
| 196 | const struct net_device *out, |
| 197 | unsigned int hooknum, |
Patrick McHardy | 1c52483 | 2006-03-20 18:02:15 -0800 | [diff] [blame] | 198 | const struct xt_target *target, |
Patrick McHardy | fe1cb10 | 2006-08-22 00:35:47 -0700 | [diff] [blame] | 199 | const void *targinfo); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 200 | |
| 201 | /* Called when user tries to insert an entry of this type: |
| 202 | hook_mask is a bitmask of hooks from which it can be |
| 203 | called. */ |
| 204 | /* Should return true or false. */ |
| 205 | int (*checkentry)(const char *tablename, |
| 206 | const void *entry, |
Patrick McHardy | 1c52483 | 2006-03-20 18:02:15 -0800 | [diff] [blame] | 207 | const struct xt_target *target, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 208 | void *targinfo, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 209 | unsigned int hook_mask); |
| 210 | |
| 211 | /* Called when entry of this type deleted. */ |
Patrick McHardy | efa7416 | 2006-08-22 00:36:37 -0700 | [diff] [blame] | 212 | void (*destroy)(const struct xt_target *target, void *targinfo); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 213 | |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 214 | /* Called when userspace align differs from kernel space one */ |
Patrick McHardy | 9fa492c | 2006-09-20 12:05:37 -0700 | [diff] [blame] | 215 | void (*compat_from_user)(void *dst, void *src); |
| 216 | int (*compat_to_user)(void __user *dst, void *src); |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 217 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 218 | /* Set this to THIS_MODULE if you are a module, otherwise NULL */ |
| 219 | struct module *me; |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 220 | |
| 221 | char *table; |
| 222 | unsigned int targetsize; |
Patrick McHardy | 9fa492c | 2006-09-20 12:05:37 -0700 | [diff] [blame] | 223 | unsigned int compatsize; |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 224 | unsigned int hooks; |
| 225 | unsigned short proto; |
Patrick McHardy | c4b8851 | 2006-03-20 18:03:40 -0800 | [diff] [blame] | 226 | |
| 227 | unsigned short family; |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 228 | u_int8_t revision; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 229 | }; |
| 230 | |
| 231 | /* Furniture shopping... */ |
| 232 | struct xt_table |
| 233 | { |
| 234 | struct list_head list; |
| 235 | |
| 236 | /* A unique name... */ |
| 237 | char name[XT_TABLE_MAXNAMELEN]; |
| 238 | |
| 239 | /* What hooks you will enter on */ |
| 240 | unsigned int valid_hooks; |
| 241 | |
| 242 | /* Lock for the curtain */ |
| 243 | rwlock_t lock; |
| 244 | |
| 245 | /* Man behind the curtain... */ |
| 246 | //struct ip6t_table_info *private; |
| 247 | void *private; |
| 248 | |
| 249 | /* Set this to THIS_MODULE if you are a module, otherwise NULL */ |
| 250 | struct module *me; |
| 251 | |
| 252 | int af; /* address/protocol family */ |
| 253 | }; |
| 254 | |
| 255 | #include <linux/netfilter_ipv4.h> |
| 256 | |
| 257 | /* The table itself */ |
| 258 | struct xt_table_info |
| 259 | { |
| 260 | /* Size per table */ |
| 261 | unsigned int size; |
| 262 | /* Number of entries: FIXME. --RR */ |
| 263 | unsigned int number; |
| 264 | /* Initial number of entries. Needed for module usage count */ |
| 265 | unsigned int initial_entries; |
| 266 | |
| 267 | /* Entry points and underflows */ |
| 268 | unsigned int hook_entry[NF_IP_NUMHOOKS]; |
| 269 | unsigned int underflow[NF_IP_NUMHOOKS]; |
| 270 | |
| 271 | /* ipt_entry tables: one per CPU */ |
| 272 | char *entries[NR_CPUS]; |
| 273 | }; |
| 274 | |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 275 | extern int xt_register_target(struct xt_target *target); |
| 276 | extern void xt_unregister_target(struct xt_target *target); |
Patrick McHardy | 52d9c42 | 2006-08-22 00:33:45 -0700 | [diff] [blame] | 277 | extern int xt_register_targets(struct xt_target *target, unsigned int n); |
| 278 | extern void xt_unregister_targets(struct xt_target *target, unsigned int n); |
| 279 | |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 280 | extern int xt_register_match(struct xt_match *target); |
| 281 | extern void xt_unregister_match(struct xt_match *target); |
Patrick McHardy | 52d9c42 | 2006-08-22 00:33:45 -0700 | [diff] [blame] | 282 | extern int xt_register_matches(struct xt_match *match, unsigned int n); |
| 283 | extern void xt_unregister_matches(struct xt_match *match, unsigned int n); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 284 | |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 285 | extern int xt_check_match(const struct xt_match *match, unsigned short family, |
| 286 | unsigned int size, const char *table, unsigned int hook, |
| 287 | unsigned short proto, int inv_proto); |
| 288 | extern int xt_check_target(const struct xt_target *target, unsigned short family, |
| 289 | unsigned int size, const char *table, unsigned int hook, |
| 290 | unsigned short proto, int inv_proto); |
| 291 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 292 | extern int xt_register_table(struct xt_table *table, |
| 293 | struct xt_table_info *bootstrap, |
| 294 | struct xt_table_info *newinfo); |
| 295 | extern void *xt_unregister_table(struct xt_table *table); |
| 296 | |
| 297 | extern struct xt_table_info *xt_replace_table(struct xt_table *table, |
| 298 | unsigned int num_counters, |
| 299 | struct xt_table_info *newinfo, |
| 300 | int *error); |
| 301 | |
| 302 | extern struct xt_match *xt_find_match(int af, const char *name, u8 revision); |
| 303 | extern struct xt_target *xt_find_target(int af, const char *name, u8 revision); |
| 304 | extern struct xt_target *xt_request_find_target(int af, const char *name, |
| 305 | u8 revision); |
| 306 | extern int xt_find_revision(int af, const char *name, u8 revision, int target, |
| 307 | int *err); |
| 308 | |
| 309 | extern struct xt_table *xt_find_table_lock(int af, const char *name); |
| 310 | extern void xt_table_unlock(struct xt_table *t); |
| 311 | |
| 312 | extern int xt_proto_init(int af); |
| 313 | extern void xt_proto_fini(int af); |
| 314 | |
| 315 | extern struct xt_table_info *xt_alloc_table_info(unsigned int size); |
| 316 | extern void xt_free_table_info(struct xt_table_info *info); |
| 317 | |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 318 | #ifdef CONFIG_COMPAT |
| 319 | #include <net/compat.h> |
| 320 | |
| 321 | struct compat_xt_entry_match |
| 322 | { |
| 323 | union { |
| 324 | struct { |
| 325 | u_int16_t match_size; |
| 326 | char name[XT_FUNCTION_MAXNAMELEN - 1]; |
| 327 | u_int8_t revision; |
| 328 | } user; |
Patrick McHardy | 46c5ea3c | 2006-05-02 05:12:22 +0200 | [diff] [blame] | 329 | struct { |
| 330 | u_int16_t match_size; |
| 331 | compat_uptr_t match; |
| 332 | } kernel; |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 333 | u_int16_t match_size; |
| 334 | } u; |
| 335 | unsigned char data[0]; |
| 336 | }; |
| 337 | |
| 338 | struct compat_xt_entry_target |
| 339 | { |
| 340 | union { |
| 341 | struct { |
| 342 | u_int16_t target_size; |
| 343 | char name[XT_FUNCTION_MAXNAMELEN - 1]; |
| 344 | u_int8_t revision; |
| 345 | } user; |
Patrick McHardy | 46c5ea3c | 2006-05-02 05:12:22 +0200 | [diff] [blame] | 346 | struct { |
| 347 | u_int16_t target_size; |
| 348 | compat_uptr_t target; |
| 349 | } kernel; |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 350 | u_int16_t target_size; |
| 351 | } u; |
| 352 | unsigned char data[0]; |
| 353 | }; |
| 354 | |
| 355 | /* FIXME: this works only on 32 bit tasks |
| 356 | * need to change whole approach in order to calculate align as function of |
| 357 | * current task alignment */ |
| 358 | |
| 359 | struct compat_xt_counters |
| 360 | { |
Patrick McHardy | 55fe586 | 2006-04-24 17:16:28 -0700 | [diff] [blame] | 361 | #if defined(CONFIG_X86_64) || defined(CONFIG_IA64) |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 362 | u_int32_t cnt[4]; |
Patrick McHardy | 55fe586 | 2006-04-24 17:16:28 -0700 | [diff] [blame] | 363 | #else |
| 364 | u_int64_t cnt[2]; |
| 365 | #endif |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 366 | }; |
| 367 | |
| 368 | struct compat_xt_counters_info |
| 369 | { |
| 370 | char name[XT_TABLE_MAXNAMELEN]; |
| 371 | compat_uint_t num_counters; |
| 372 | struct compat_xt_counters counters[0]; |
| 373 | }; |
| 374 | |
| 375 | #define COMPAT_XT_ALIGN(s) (((s) + (__alignof__(struct compat_xt_counters)-1)) \ |
| 376 | & ~(__alignof__(struct compat_xt_counters)-1)) |
| 377 | |
| 378 | extern void xt_compat_lock(int af); |
| 379 | extern void xt_compat_unlock(int af); |
Patrick McHardy | 9fa492c | 2006-09-20 12:05:37 -0700 | [diff] [blame] | 380 | |
| 381 | extern int xt_compat_match_offset(struct xt_match *match); |
| 382 | extern void xt_compat_match_from_user(struct xt_entry_match *m, |
| 383 | void **dstptr, int *size); |
| 384 | extern int xt_compat_match_to_user(struct xt_entry_match *m, |
Al Viro | 3e597c6 | 2006-09-24 23:42:20 +0100 | [diff] [blame] | 385 | void __user **dstptr, int *size); |
Patrick McHardy | 9fa492c | 2006-09-20 12:05:37 -0700 | [diff] [blame] | 386 | |
| 387 | extern int xt_compat_target_offset(struct xt_target *target); |
| 388 | extern void xt_compat_target_from_user(struct xt_entry_target *t, |
| 389 | void **dstptr, int *size); |
| 390 | extern int xt_compat_target_to_user(struct xt_entry_target *t, |
Al Viro | 3e597c6 | 2006-09-24 23:42:20 +0100 | [diff] [blame] | 391 | void __user **dstptr, int *size); |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 392 | |
| 393 | #endif /* CONFIG_COMPAT */ |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 394 | #endif /* __KERNEL__ */ |
| 395 | |
| 396 | #endif /* _X_TABLES_H */ |