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 | |
| 57 | struct xt_standard_target |
| 58 | { |
| 59 | struct xt_entry_target target; |
| 60 | int verdict; |
| 61 | }; |
| 62 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 63 | /* The argument to IPT_SO_GET_REVISION_*. Returns highest revision |
| 64 | * kernel supports, if >= revision. */ |
| 65 | struct xt_get_revision |
| 66 | { |
| 67 | char name[XT_FUNCTION_MAXNAMELEN-1]; |
| 68 | |
| 69 | u_int8_t revision; |
| 70 | }; |
| 71 | |
| 72 | /* CONTINUE verdict for targets */ |
| 73 | #define XT_CONTINUE 0xFFFFFFFF |
| 74 | |
| 75 | /* For standard target */ |
| 76 | #define XT_RETURN (-NF_REPEAT - 1) |
| 77 | |
David S. Miller | 6fbfc96 | 2006-01-20 11:57:07 -0800 | [diff] [blame] | 78 | /* this is a dummy structure to find out the alignment requirement for a struct |
| 79 | * containing all the fundamental data types that are used in ipt_entry, |
| 80 | * ip6t_entry and arpt_entry. This sucks, and it is a hack. It will be my |
| 81 | * personal pleasure to remove it -HW |
| 82 | */ |
| 83 | struct _xt_align |
| 84 | { |
| 85 | u_int8_t u8; |
| 86 | u_int16_t u16; |
| 87 | u_int32_t u32; |
| 88 | u_int64_t u64; |
| 89 | }; |
| 90 | |
| 91 | #define XT_ALIGN(s) (((s) + (__alignof__(struct _xt_align)-1)) \ |
| 92 | & ~(__alignof__(struct _xt_align)-1)) |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 93 | |
| 94 | /* Standard return verdict, or do jump. */ |
| 95 | #define XT_STANDARD_TARGET "" |
| 96 | /* Error verdict. */ |
| 97 | #define XT_ERROR_TARGET "ERROR" |
| 98 | |
| 99 | /* |
| 100 | * New IP firewall options for [gs]etsockopt at the RAW IP level. |
| 101 | * Unlike BSD Linux inherits IP options so you don't have to use a raw |
| 102 | * socket for this. Instead we check rights in the calls. */ |
| 103 | #define XT_BASE_CTL 64 /* base for firewall socket options */ |
| 104 | |
| 105 | #define XT_SO_SET_REPLACE (XT_BASE_CTL) |
| 106 | #define XT_SO_SET_ADD_COUNTERS (XT_BASE_CTL + 1) |
| 107 | #define XT_SO_SET_MAX XT_SO_SET_ADD_COUNTERS |
| 108 | |
| 109 | #define XT_SO_GET_INFO (XT_BASE_CTL) |
| 110 | #define XT_SO_GET_ENTRIES (XT_BASE_CTL + 1) |
| 111 | #define XT_SO_GET_REVISION_MATCH (XT_BASE_CTL + 2) |
| 112 | #define XT_SO_GET_REVISION_TARGET (XT_BASE_CTL + 3) |
| 113 | #define XT_SO_GET_MAX XT_SO_GET_REVISION_TARGET |
| 114 | |
| 115 | #define SET_COUNTER(c,b,p) do { (c).bcnt = (b); (c).pcnt = (p); } while(0) |
| 116 | #define ADD_COUNTER(c,b,p) do { (c).bcnt += (b); (c).pcnt += (p); } while(0) |
| 117 | |
| 118 | struct xt_counters |
| 119 | { |
| 120 | u_int64_t pcnt, bcnt; /* Packet and byte counters */ |
| 121 | }; |
| 122 | |
| 123 | /* The argument to IPT_SO_ADD_COUNTERS. */ |
| 124 | struct xt_counters_info |
| 125 | { |
| 126 | /* Which table. */ |
| 127 | char name[XT_TABLE_MAXNAMELEN]; |
| 128 | |
| 129 | unsigned int num_counters; |
| 130 | |
| 131 | /* The counters (actually `number' of these). */ |
| 132 | struct xt_counters counters[0]; |
| 133 | }; |
| 134 | |
| 135 | #define XT_INV_PROTO 0x40 /* Invert the sense of PROTO. */ |
| 136 | |
| 137 | #ifdef __KERNEL__ |
| 138 | |
| 139 | #include <linux/netdevice.h> |
| 140 | |
| 141 | #define ASSERT_READ_LOCK(x) |
| 142 | #define ASSERT_WRITE_LOCK(x) |
| 143 | #include <linux/netfilter_ipv4/listhelp.h> |
| 144 | |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 145 | #ifdef CONFIG_COMPAT |
| 146 | #define COMPAT_TO_USER 1 |
| 147 | #define COMPAT_FROM_USER -1 |
| 148 | #define COMPAT_CALC_SIZE 0 |
| 149 | #endif |
| 150 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 151 | struct xt_match |
| 152 | { |
| 153 | struct list_head list; |
| 154 | |
| 155 | const char name[XT_FUNCTION_MAXNAMELEN-1]; |
| 156 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 157 | /* Return true or false: return FALSE and set *hotdrop = 1 to |
| 158 | force immediate packet drop. */ |
| 159 | /* Arguments changed since 2.6.9, as this must now handle |
| 160 | non-linear skb, using skb_header_pointer and |
| 161 | skb_ip_make_writable. */ |
| 162 | int (*match)(const struct sk_buff *skb, |
| 163 | const struct net_device *in, |
| 164 | const struct net_device *out, |
Patrick McHardy | 1c52483 | 2006-03-20 18:02:15 -0800 | [diff] [blame] | 165 | const struct xt_match *match, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 166 | const void *matchinfo, |
| 167 | int offset, |
| 168 | unsigned int protoff, |
| 169 | int *hotdrop); |
| 170 | |
| 171 | /* Called when user tries to insert an entry of this type. */ |
| 172 | /* Should return true or false. */ |
| 173 | int (*checkentry)(const char *tablename, |
| 174 | const void *ip, |
Patrick McHardy | 1c52483 | 2006-03-20 18:02:15 -0800 | [diff] [blame] | 175 | const struct xt_match *match, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 176 | void *matchinfo, |
| 177 | unsigned int matchinfosize, |
| 178 | unsigned int hook_mask); |
| 179 | |
| 180 | /* Called when entry of this type deleted. */ |
Patrick McHardy | 1c52483 | 2006-03-20 18:02:15 -0800 | [diff] [blame] | 181 | void (*destroy)(const struct xt_match *match, void *matchinfo, |
| 182 | unsigned int matchinfosize); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 183 | |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 184 | /* Called when userspace align differs from kernel space one */ |
| 185 | int (*compat)(void *match, void **dstptr, int *size, int convert); |
| 186 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 187 | /* Set this to THIS_MODULE if you are a module, otherwise NULL */ |
| 188 | struct module *me; |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 189 | |
| 190 | char *table; |
| 191 | unsigned int matchsize; |
| 192 | unsigned int hooks; |
| 193 | unsigned short proto; |
Patrick McHardy | c4b8851 | 2006-03-20 18:03:40 -0800 | [diff] [blame] | 194 | |
| 195 | unsigned short family; |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 196 | u_int8_t revision; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 197 | }; |
| 198 | |
| 199 | /* Registration hooks for targets. */ |
| 200 | struct xt_target |
| 201 | { |
| 202 | struct list_head list; |
| 203 | |
| 204 | const char name[XT_FUNCTION_MAXNAMELEN-1]; |
| 205 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 206 | /* Returns verdict. Argument order changed since 2.6.9, as this |
| 207 | must now handle non-linear skbs, using skb_copy_bits and |
| 208 | skb_ip_make_writable. */ |
| 209 | unsigned int (*target)(struct sk_buff **pskb, |
| 210 | const struct net_device *in, |
| 211 | const struct net_device *out, |
| 212 | unsigned int hooknum, |
Patrick McHardy | 1c52483 | 2006-03-20 18:02:15 -0800 | [diff] [blame] | 213 | const struct xt_target *target, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 214 | const void *targinfo, |
| 215 | void *userdata); |
| 216 | |
| 217 | /* Called when user tries to insert an entry of this type: |
| 218 | hook_mask is a bitmask of hooks from which it can be |
| 219 | called. */ |
| 220 | /* Should return true or false. */ |
| 221 | int (*checkentry)(const char *tablename, |
| 222 | const void *entry, |
Patrick McHardy | 1c52483 | 2006-03-20 18:02:15 -0800 | [diff] [blame] | 223 | const struct xt_target *target, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 224 | void *targinfo, |
| 225 | unsigned int targinfosize, |
| 226 | unsigned int hook_mask); |
| 227 | |
| 228 | /* Called when entry of this type deleted. */ |
Patrick McHardy | 1c52483 | 2006-03-20 18:02:15 -0800 | [diff] [blame] | 229 | void (*destroy)(const struct xt_target *target, void *targinfo, |
| 230 | unsigned int targinfosize); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 231 | |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 232 | /* Called when userspace align differs from kernel space one */ |
| 233 | int (*compat)(void *target, void **dstptr, int *size, int convert); |
| 234 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 235 | /* Set this to THIS_MODULE if you are a module, otherwise NULL */ |
| 236 | struct module *me; |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 237 | |
| 238 | char *table; |
| 239 | unsigned int targetsize; |
| 240 | unsigned int hooks; |
| 241 | unsigned short proto; |
Patrick McHardy | c4b8851 | 2006-03-20 18:03:40 -0800 | [diff] [blame] | 242 | |
| 243 | unsigned short family; |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 244 | u_int8_t revision; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 245 | }; |
| 246 | |
| 247 | /* Furniture shopping... */ |
| 248 | struct xt_table |
| 249 | { |
| 250 | struct list_head list; |
| 251 | |
| 252 | /* A unique name... */ |
| 253 | char name[XT_TABLE_MAXNAMELEN]; |
| 254 | |
| 255 | /* What hooks you will enter on */ |
| 256 | unsigned int valid_hooks; |
| 257 | |
| 258 | /* Lock for the curtain */ |
| 259 | rwlock_t lock; |
| 260 | |
| 261 | /* Man behind the curtain... */ |
| 262 | //struct ip6t_table_info *private; |
| 263 | void *private; |
| 264 | |
| 265 | /* Set this to THIS_MODULE if you are a module, otherwise NULL */ |
| 266 | struct module *me; |
| 267 | |
| 268 | int af; /* address/protocol family */ |
| 269 | }; |
| 270 | |
| 271 | #include <linux/netfilter_ipv4.h> |
| 272 | |
| 273 | /* The table itself */ |
| 274 | struct xt_table_info |
| 275 | { |
| 276 | /* Size per table */ |
| 277 | unsigned int size; |
| 278 | /* Number of entries: FIXME. --RR */ |
| 279 | unsigned int number; |
| 280 | /* Initial number of entries. Needed for module usage count */ |
| 281 | unsigned int initial_entries; |
| 282 | |
| 283 | /* Entry points and underflows */ |
| 284 | unsigned int hook_entry[NF_IP_NUMHOOKS]; |
| 285 | unsigned int underflow[NF_IP_NUMHOOKS]; |
| 286 | |
| 287 | /* ipt_entry tables: one per CPU */ |
| 288 | char *entries[NR_CPUS]; |
| 289 | }; |
| 290 | |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 291 | extern int xt_register_target(struct xt_target *target); |
| 292 | extern void xt_unregister_target(struct xt_target *target); |
| 293 | extern int xt_register_match(struct xt_match *target); |
| 294 | extern void xt_unregister_match(struct xt_match *target); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 295 | |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 296 | extern int xt_check_match(const struct xt_match *match, unsigned short family, |
| 297 | unsigned int size, const char *table, unsigned int hook, |
| 298 | unsigned short proto, int inv_proto); |
| 299 | extern int xt_check_target(const struct xt_target *target, unsigned short family, |
| 300 | unsigned int size, const char *table, unsigned int hook, |
| 301 | unsigned short proto, int inv_proto); |
| 302 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 303 | extern int xt_register_table(struct xt_table *table, |
| 304 | struct xt_table_info *bootstrap, |
| 305 | struct xt_table_info *newinfo); |
| 306 | extern void *xt_unregister_table(struct xt_table *table); |
| 307 | |
| 308 | extern struct xt_table_info *xt_replace_table(struct xt_table *table, |
| 309 | unsigned int num_counters, |
| 310 | struct xt_table_info *newinfo, |
| 311 | int *error); |
| 312 | |
| 313 | extern struct xt_match *xt_find_match(int af, const char *name, u8 revision); |
| 314 | extern struct xt_target *xt_find_target(int af, const char *name, u8 revision); |
| 315 | extern struct xt_target *xt_request_find_target(int af, const char *name, |
| 316 | u8 revision); |
| 317 | extern int xt_find_revision(int af, const char *name, u8 revision, int target, |
| 318 | int *err); |
| 319 | |
| 320 | extern struct xt_table *xt_find_table_lock(int af, const char *name); |
| 321 | extern void xt_table_unlock(struct xt_table *t); |
| 322 | |
| 323 | extern int xt_proto_init(int af); |
| 324 | extern void xt_proto_fini(int af); |
| 325 | |
| 326 | extern struct xt_table_info *xt_alloc_table_info(unsigned int size); |
| 327 | extern void xt_free_table_info(struct xt_table_info *info); |
| 328 | |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 329 | #ifdef CONFIG_COMPAT |
| 330 | #include <net/compat.h> |
| 331 | |
| 332 | struct compat_xt_entry_match |
| 333 | { |
| 334 | union { |
| 335 | struct { |
| 336 | u_int16_t match_size; |
| 337 | char name[XT_FUNCTION_MAXNAMELEN - 1]; |
| 338 | u_int8_t revision; |
| 339 | } user; |
Patrick McHardy | 46c5ea3c | 2006-05-02 05:12:22 +0200 | [diff] [blame] | 340 | struct { |
| 341 | u_int16_t match_size; |
| 342 | compat_uptr_t match; |
| 343 | } kernel; |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 344 | u_int16_t match_size; |
| 345 | } u; |
| 346 | unsigned char data[0]; |
| 347 | }; |
| 348 | |
| 349 | struct compat_xt_entry_target |
| 350 | { |
| 351 | union { |
| 352 | struct { |
| 353 | u_int16_t target_size; |
| 354 | char name[XT_FUNCTION_MAXNAMELEN - 1]; |
| 355 | u_int8_t revision; |
| 356 | } user; |
Patrick McHardy | 46c5ea3c | 2006-05-02 05:12:22 +0200 | [diff] [blame] | 357 | struct { |
| 358 | u_int16_t target_size; |
| 359 | compat_uptr_t target; |
| 360 | } kernel; |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 361 | u_int16_t target_size; |
| 362 | } u; |
| 363 | unsigned char data[0]; |
| 364 | }; |
| 365 | |
| 366 | /* FIXME: this works only on 32 bit tasks |
| 367 | * need to change whole approach in order to calculate align as function of |
| 368 | * current task alignment */ |
| 369 | |
| 370 | struct compat_xt_counters |
| 371 | { |
Patrick McHardy | 55fe586 | 2006-04-24 17:16:28 -0700 | [diff] [blame] | 372 | #if defined(CONFIG_X86_64) || defined(CONFIG_IA64) |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 373 | u_int32_t cnt[4]; |
Patrick McHardy | 55fe586 | 2006-04-24 17:16:28 -0700 | [diff] [blame] | 374 | #else |
| 375 | u_int64_t cnt[2]; |
| 376 | #endif |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 377 | }; |
| 378 | |
| 379 | struct compat_xt_counters_info |
| 380 | { |
| 381 | char name[XT_TABLE_MAXNAMELEN]; |
| 382 | compat_uint_t num_counters; |
| 383 | struct compat_xt_counters counters[0]; |
| 384 | }; |
| 385 | |
| 386 | #define COMPAT_XT_ALIGN(s) (((s) + (__alignof__(struct compat_xt_counters)-1)) \ |
| 387 | & ~(__alignof__(struct compat_xt_counters)-1)) |
| 388 | |
| 389 | extern void xt_compat_lock(int af); |
| 390 | extern void xt_compat_unlock(int af); |
| 391 | extern int xt_compat_match(void *match, void **dstptr, int *size, int convert); |
| 392 | extern int xt_compat_target(void *target, void **dstptr, int *size, |
| 393 | int convert); |
| 394 | |
| 395 | #endif /* CONFIG_COMPAT */ |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 396 | #endif /* __KERNEL__ */ |
| 397 | |
| 398 | #endif /* _X_TABLES_H */ |