Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1 | #ifndef _X_TABLES_H |
| 2 | #define _X_TABLES_H |
Arnd Bergmann | 60c195c | 2009-02-26 00:51:43 +0100 | [diff] [blame] | 3 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 4 | |
| 5 | #include <linux/netdevice.h> |
David Howells | 94d0ec5 | 2012-10-09 09:48:54 +0100 | [diff] [blame] | 6 | #include <uapi/linux/netfilter/x_tables.h> |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 7 | |
Jan Engelhardt | f7108a2 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 8 | /** |
Jan Engelhardt | de74c16 | 2009-07-05 18:26:37 +0200 | [diff] [blame] | 9 | * struct xt_action_param - parameters for matches/targets |
Jan Engelhardt | f7108a2 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 10 | * |
Jan Engelhardt | de74c16 | 2009-07-05 18:26:37 +0200 | [diff] [blame] | 11 | * @match: the match extension |
| 12 | * @target: the target extension |
| 13 | * @matchinfo: per-match data |
| 14 | * @targetinfo: per-target data |
Jan Engelhardt | f7108a2 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 15 | * @in: input netdevice |
| 16 | * @out: output netdevice |
Jan Engelhardt | f7108a2 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 17 | * @fragoff: packet is a fragment, this is the data offset |
| 18 | * @thoff: position of transport header relative to skb->data |
Evgeniy Polyakov | a5e7882 | 2009-06-04 16:54:42 +0200 | [diff] [blame] | 19 | * @hook: hook number given packet came from |
Jan Engelhardt | 916a917 | 2008-10-08 11:35:20 +0200 | [diff] [blame] | 20 | * @family: Actual NFPROTO_* through which the function is invoked |
| 21 | * (helpful when match->family == NFPROTO_UNSPEC) |
Jan Engelhardt | b4ba261 | 2009-07-07 20:54:30 +0200 | [diff] [blame] | 22 | * |
| 23 | * Fields written to by extensions: |
| 24 | * |
Evgeniy Polyakov | a5e7882 | 2009-06-04 16:54:42 +0200 | [diff] [blame] | 25 | * @hotdrop: drop packet if we had inspection problems |
Jan Engelhardt | 1659978 | 2010-03-18 10:30:44 +0100 | [diff] [blame] | 26 | * Network namespace obtainable using dev_net(in/out) |
Jan Engelhardt | f7108a2 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 27 | */ |
Jan Engelhardt | de74c16 | 2009-07-05 18:26:37 +0200 | [diff] [blame] | 28 | struct xt_action_param { |
| 29 | union { |
| 30 | const struct xt_match *match; |
| 31 | const struct xt_target *target; |
| 32 | }; |
| 33 | union { |
| 34 | const void *matchinfo, *targinfo; |
| 35 | }; |
Jan Engelhardt | f7108a2 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 36 | const struct net_device *in, *out; |
Jan Engelhardt | f7108a2 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 37 | int fragoff; |
| 38 | unsigned int thoff; |
Evgeniy Polyakov | a5e7882 | 2009-06-04 16:54:42 +0200 | [diff] [blame] | 39 | unsigned int hooknum; |
Jan Engelhardt | 916a917 | 2008-10-08 11:35:20 +0200 | [diff] [blame] | 40 | u_int8_t family; |
Jan Engelhardt | b4ba261 | 2009-07-07 20:54:30 +0200 | [diff] [blame] | 41 | bool hotdrop; |
Jan Engelhardt | f7108a2 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 42 | }; |
| 43 | |
Jan Engelhardt | 9b4fce7 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 44 | /** |
| 45 | * struct xt_mtchk_param - parameters for match extensions' |
| 46 | * checkentry functions |
| 47 | * |
Jan Engelhardt | 1659978 | 2010-03-18 10:30:44 +0100 | [diff] [blame] | 48 | * @net: network namespace through which the check was invoked |
Jan Engelhardt | 9b4fce7 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 49 | * @table: table the rule is tried to be inserted into |
| 50 | * @entryinfo: the family-specific rule data |
Jan Engelhardt | 1659978 | 2010-03-18 10:30:44 +0100 | [diff] [blame] | 51 | * (struct ipt_ip, ip6t_ip, arpt_arp or (note) ebt_entry) |
Jan Engelhardt | 9b4fce7 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 52 | * @match: struct xt_match through which this function was invoked |
| 53 | * @matchinfo: per-match data |
| 54 | * @hook_mask: via which hooks the new rule is reachable |
Jan Engelhardt | 1659978 | 2010-03-18 10:30:44 +0100 | [diff] [blame] | 55 | * Other fields as above. |
Jan Engelhardt | 9b4fce7 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 56 | */ |
| 57 | struct xt_mtchk_param { |
Alexey Dobriyan | a83d8e8 | 2010-01-18 08:21:13 +0100 | [diff] [blame] | 58 | struct net *net; |
Jan Engelhardt | 9b4fce7 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 59 | const char *table; |
| 60 | const void *entryinfo; |
| 61 | const struct xt_match *match; |
| 62 | void *matchinfo; |
| 63 | unsigned int hook_mask; |
Jan Engelhardt | 916a917 | 2008-10-08 11:35:20 +0200 | [diff] [blame] | 64 | u_int8_t family; |
Jan Engelhardt | 9b4fce7 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 65 | }; |
| 66 | |
Jan Engelhardt | 1659978 | 2010-03-18 10:30:44 +0100 | [diff] [blame] | 67 | /** |
| 68 | * struct xt_mdtor_param - match destructor parameters |
| 69 | * Fields as above. |
| 70 | */ |
Jan Engelhardt | 6be3d85 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 71 | struct xt_mtdtor_param { |
Alexey Dobriyan | f54e936 | 2010-01-18 08:25:47 +0100 | [diff] [blame] | 72 | struct net *net; |
Jan Engelhardt | 6be3d85 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 73 | const struct xt_match *match; |
| 74 | void *matchinfo; |
Jan Engelhardt | 916a917 | 2008-10-08 11:35:20 +0200 | [diff] [blame] | 75 | u_int8_t family; |
Jan Engelhardt | 6be3d85 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 76 | }; |
| 77 | |
Jan Engelhardt | 7eb3558 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 78 | /** |
Jan Engelhardt | af5d6dc | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 79 | * struct xt_tgchk_param - parameters for target extensions' |
| 80 | * checkentry functions |
| 81 | * |
| 82 | * @entryinfo: the family-specific rule data |
| 83 | * (struct ipt_entry, ip6t_entry, arpt_entry, ebt_entry) |
| 84 | * |
| 85 | * Other fields see above. |
| 86 | */ |
| 87 | struct xt_tgchk_param { |
Patrick McHardy | add6746 | 2010-02-03 13:45:12 +0100 | [diff] [blame] | 88 | struct net *net; |
Jan Engelhardt | af5d6dc | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 89 | const char *table; |
Jan Engelhardt | f79fca5 | 2008-11-24 16:06:17 -0800 | [diff] [blame] | 90 | const void *entryinfo; |
Jan Engelhardt | af5d6dc | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 91 | const struct xt_target *target; |
| 92 | void *targinfo; |
| 93 | unsigned int hook_mask; |
Jan Engelhardt | 916a917 | 2008-10-08 11:35:20 +0200 | [diff] [blame] | 94 | u_int8_t family; |
Jan Engelhardt | af5d6dc | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 95 | }; |
| 96 | |
Jan Engelhardt | a2df164 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 97 | /* Target destructor parameters */ |
| 98 | struct xt_tgdtor_param { |
Patrick McHardy | add6746 | 2010-02-03 13:45:12 +0100 | [diff] [blame] | 99 | struct net *net; |
Jan Engelhardt | a2df164 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 100 | const struct xt_target *target; |
| 101 | void *targinfo; |
Jan Engelhardt | 916a917 | 2008-10-08 11:35:20 +0200 | [diff] [blame] | 102 | u_int8_t family; |
Jan Engelhardt | a2df164 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 103 | }; |
| 104 | |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 105 | struct xt_match { |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 106 | struct list_head list; |
| 107 | |
Jan Engelhardt | 4b2cbd4 | 2010-04-27 15:34:34 +0200 | [diff] [blame] | 108 | const char name[XT_EXTENSION_MAXNAMELEN]; |
Richard Kennedy | daaf83d | 2009-01-12 00:06:11 +0000 | [diff] [blame] | 109 | u_int8_t revision; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 110 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 111 | /* Return true or false: return FALSE and set *hotdrop = 1 to |
| 112 | force immediate packet drop. */ |
| 113 | /* Arguments changed since 2.6.9, as this must now handle |
| 114 | non-linear skb, using skb_header_pointer and |
| 115 | skb_ip_make_writable. */ |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame] | 116 | bool (*match)(const struct sk_buff *skb, |
Jan Engelhardt | 62fc805 | 2009-07-07 20:42:08 +0200 | [diff] [blame] | 117 | struct xt_action_param *); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 118 | |
| 119 | /* Called when user tries to insert an entry of this type. */ |
Jan Engelhardt | b0f3845 | 2010-03-19 17:16:42 +0100 | [diff] [blame] | 120 | int (*checkentry)(const struct xt_mtchk_param *); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 121 | |
| 122 | /* Called when entry of this type deleted. */ |
Jan Engelhardt | 6be3d85 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 123 | void (*destroy)(const struct xt_mtdtor_param *); |
Alexey Dobriyan | c30f540 | 2010-02-02 15:03:24 +0100 | [diff] [blame] | 124 | #ifdef CONFIG_COMPAT |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 125 | /* Called when userspace align differs from kernel space one */ |
Jan Engelhardt | 739674f | 2009-06-26 08:23:19 +0200 | [diff] [blame] | 126 | void (*compat_from_user)(void *dst, const void *src); |
| 127 | int (*compat_to_user)(void __user *dst, const void *src); |
Alexey Dobriyan | c30f540 | 2010-02-02 15:03:24 +0100 | [diff] [blame] | 128 | #endif |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 129 | /* Set this to THIS_MODULE if you are a module, otherwise NULL */ |
| 130 | struct module *me; |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 131 | |
Jan Engelhardt | ecb6f85 | 2008-01-31 03:54:47 -0800 | [diff] [blame] | 132 | const char *table; |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 133 | unsigned int matchsize; |
Alexey Dobriyan | c30f540 | 2010-02-02 15:03:24 +0100 | [diff] [blame] | 134 | #ifdef CONFIG_COMPAT |
Patrick McHardy | 9fa492c | 2006-09-20 12:05:37 -0700 | [diff] [blame] | 135 | unsigned int compatsize; |
Alexey Dobriyan | c30f540 | 2010-02-02 15:03:24 +0100 | [diff] [blame] | 136 | #endif |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 137 | unsigned int hooks; |
| 138 | unsigned short proto; |
Patrick McHardy | c4b8851 | 2006-03-20 18:03:40 -0800 | [diff] [blame] | 139 | |
| 140 | unsigned short family; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 141 | }; |
| 142 | |
| 143 | /* Registration hooks for targets. */ |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 144 | struct xt_target { |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 145 | struct list_head list; |
| 146 | |
Jan Engelhardt | 4b2cbd4 | 2010-04-27 15:34:34 +0200 | [diff] [blame] | 147 | const char name[XT_EXTENSION_MAXNAMELEN]; |
Jan Engelhardt | f5c511c | 2010-03-18 14:02:10 +0100 | [diff] [blame] | 148 | u_int8_t revision; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 149 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 150 | /* Returns verdict. Argument order changed since 2.6.9, as this |
| 151 | must now handle non-linear skbs, using skb_copy_bits and |
| 152 | skb_ip_make_writable. */ |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 153 | unsigned int (*target)(struct sk_buff *skb, |
Jan Engelhardt | de74c16 | 2009-07-05 18:26:37 +0200 | [diff] [blame] | 154 | const struct xt_action_param *); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 155 | |
| 156 | /* Called when user tries to insert an entry of this type: |
| 157 | hook_mask is a bitmask of hooks from which it can be |
| 158 | called. */ |
Luciano Coelho | 7ea7b85 | 2010-05-20 15:59:16 +0200 | [diff] [blame] | 159 | /* Should return 0 on success or an error code otherwise (-Exxxx). */ |
Jan Engelhardt | 135367b | 2010-03-19 17:16:42 +0100 | [diff] [blame] | 160 | int (*checkentry)(const struct xt_tgchk_param *); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 161 | |
| 162 | /* Called when entry of this type deleted. */ |
Jan Engelhardt | a2df164 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 163 | void (*destroy)(const struct xt_tgdtor_param *); |
Alexey Dobriyan | c30f540 | 2010-02-02 15:03:24 +0100 | [diff] [blame] | 164 | #ifdef CONFIG_COMPAT |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 165 | /* Called when userspace align differs from kernel space one */ |
Jan Engelhardt | 739674f | 2009-06-26 08:23:19 +0200 | [diff] [blame] | 166 | void (*compat_from_user)(void *dst, const void *src); |
| 167 | int (*compat_to_user)(void __user *dst, const void *src); |
Alexey Dobriyan | c30f540 | 2010-02-02 15:03:24 +0100 | [diff] [blame] | 168 | #endif |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 169 | /* Set this to THIS_MODULE if you are a module, otherwise NULL */ |
| 170 | struct module *me; |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 171 | |
Jan Engelhardt | ecb6f85 | 2008-01-31 03:54:47 -0800 | [diff] [blame] | 172 | const char *table; |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 173 | unsigned int targetsize; |
Alexey Dobriyan | c30f540 | 2010-02-02 15:03:24 +0100 | [diff] [blame] | 174 | #ifdef CONFIG_COMPAT |
Patrick McHardy | 9fa492c | 2006-09-20 12:05:37 -0700 | [diff] [blame] | 175 | unsigned int compatsize; |
Alexey Dobriyan | c30f540 | 2010-02-02 15:03:24 +0100 | [diff] [blame] | 176 | #endif |
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; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 181 | }; |
| 182 | |
| 183 | /* Furniture shopping... */ |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 184 | struct xt_table { |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 185 | struct list_head list; |
| 186 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 187 | /* What hooks you will enter on */ |
| 188 | unsigned int valid_hooks; |
| 189 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 190 | /* Man behind the curtain... */ |
Stephen Hemminger | 4a2f965 | 2009-02-18 16:29:44 +0100 | [diff] [blame] | 191 | struct xt_table_info *private; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 192 | |
| 193 | /* Set this to THIS_MODULE if you are a module, otherwise NULL */ |
| 194 | struct module *me; |
| 195 | |
Jan Engelhardt | 76108ce | 2008-10-08 11:35:00 +0200 | [diff] [blame] | 196 | u_int8_t af; /* address/protocol family */ |
Jan Engelhardt | 2b95efe | 2009-06-17 13:57:48 +0200 | [diff] [blame] | 197 | int priority; /* hook order */ |
Stephen Hemminger | 4a2f965 | 2009-02-18 16:29:44 +0100 | [diff] [blame] | 198 | |
| 199 | /* A unique name... */ |
| 200 | const char name[XT_TABLE_MAXNAMELEN]; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 201 | }; |
| 202 | |
| 203 | #include <linux/netfilter_ipv4.h> |
| 204 | |
| 205 | /* The table itself */ |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 206 | struct xt_table_info { |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 207 | /* Size per table */ |
| 208 | unsigned int size; |
| 209 | /* Number of entries: FIXME. --RR */ |
| 210 | unsigned int number; |
| 211 | /* Initial number of entries. Needed for module usage count */ |
| 212 | unsigned int initial_entries; |
| 213 | |
| 214 | /* Entry points and underflows */ |
Patrick McHardy | 6e23ae2 | 2007-11-19 18:53:30 -0800 | [diff] [blame] | 215 | unsigned int hook_entry[NF_INET_NUMHOOKS]; |
| 216 | unsigned int underflow[NF_INET_NUMHOOKS]; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 217 | |
Jan Engelhardt | f3c5c1b | 2010-04-19 16:05:10 +0200 | [diff] [blame] | 218 | /* |
| 219 | * Number of user chains. Since tables cannot have loops, at most |
| 220 | * @stacksize jumps (number of user chains) can possibly be made. |
| 221 | */ |
| 222 | unsigned int stacksize; |
Eric Dumazet | 7489aec | 2010-05-31 16:41:35 +0200 | [diff] [blame] | 223 | unsigned int __percpu *stackptr; |
Jan Engelhardt | f3c5c1b | 2010-04-19 16:05:10 +0200 | [diff] [blame] | 224 | void ***jumpstack; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 225 | /* ipt_entry tables: one per CPU */ |
Eric Dumazet | 259d4e4 | 2007-12-04 23:24:56 -0800 | [diff] [blame] | 226 | /* Note : this field MUST be the last one, see XT_TABLE_INFO_SZ */ |
Stephen Hemminger | 7845447 | 2009-02-20 10:35:32 +0100 | [diff] [blame] | 227 | void *entries[1]; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 228 | }; |
| 229 | |
Eric Dumazet | 259d4e4 | 2007-12-04 23:24:56 -0800 | [diff] [blame] | 230 | #define XT_TABLE_INFO_SZ (offsetof(struct xt_table_info, entries) \ |
| 231 | + nr_cpu_ids * sizeof(char *)) |
Joe Perches | a0f4ecf | 2013-09-26 14:48:15 -0700 | [diff] [blame] | 232 | int xt_register_target(struct xt_target *target); |
| 233 | void xt_unregister_target(struct xt_target *target); |
| 234 | int xt_register_targets(struct xt_target *target, unsigned int n); |
| 235 | void xt_unregister_targets(struct xt_target *target, unsigned int n); |
Patrick McHardy | 52d9c42 | 2006-08-22 00:33:45 -0700 | [diff] [blame] | 236 | |
Joe Perches | a0f4ecf | 2013-09-26 14:48:15 -0700 | [diff] [blame] | 237 | int xt_register_match(struct xt_match *target); |
| 238 | void xt_unregister_match(struct xt_match *target); |
| 239 | int xt_register_matches(struct xt_match *match, unsigned int n); |
| 240 | void xt_unregister_matches(struct xt_match *match, unsigned int n); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 241 | |
Joe Perches | a0f4ecf | 2013-09-26 14:48:15 -0700 | [diff] [blame] | 242 | int xt_check_match(struct xt_mtchk_param *, unsigned int size, u_int8_t proto, |
| 243 | bool inv_proto); |
| 244 | int xt_check_target(struct xt_tgchk_param *, unsigned int size, u_int8_t proto, |
| 245 | bool inv_proto); |
Patrick McHardy | 37f9f73 | 2006-03-20 17:59:06 -0800 | [diff] [blame] | 246 | |
Joe Perches | a0f4ecf | 2013-09-26 14:48:15 -0700 | [diff] [blame] | 247 | struct xt_table *xt_register_table(struct net *net, |
| 248 | const struct xt_table *table, |
| 249 | struct xt_table_info *bootstrap, |
| 250 | struct xt_table_info *newinfo); |
| 251 | void *xt_unregister_table(struct xt_table *table); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 252 | |
Joe Perches | a0f4ecf | 2013-09-26 14:48:15 -0700 | [diff] [blame] | 253 | struct xt_table_info *xt_replace_table(struct xt_table *table, |
| 254 | unsigned int num_counters, |
| 255 | struct xt_table_info *newinfo, |
| 256 | int *error); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 257 | |
Joe Perches | a0f4ecf | 2013-09-26 14:48:15 -0700 | [diff] [blame] | 258 | struct xt_match *xt_find_match(u8 af, const char *name, u8 revision); |
| 259 | struct xt_target *xt_find_target(u8 af, const char *name, u8 revision); |
| 260 | struct xt_match *xt_request_find_match(u8 af, const char *name, u8 revision); |
| 261 | struct xt_target *xt_request_find_target(u8 af, const char *name, u8 revision); |
| 262 | int xt_find_revision(u8 af, const char *name, u8 revision, int target, |
| 263 | int *err); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 264 | |
Joe Perches | a0f4ecf | 2013-09-26 14:48:15 -0700 | [diff] [blame] | 265 | struct xt_table *xt_find_table_lock(struct net *net, u_int8_t af, |
| 266 | const char *name); |
| 267 | void xt_table_unlock(struct xt_table *t); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 268 | |
Joe Perches | a0f4ecf | 2013-09-26 14:48:15 -0700 | [diff] [blame] | 269 | int xt_proto_init(struct net *net, u_int8_t af); |
| 270 | void xt_proto_fini(struct net *net, u_int8_t af); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 271 | |
Joe Perches | a0f4ecf | 2013-09-26 14:48:15 -0700 | [diff] [blame] | 272 | struct xt_table_info *xt_alloc_table_info(unsigned int size); |
| 273 | void xt_free_table_info(struct xt_table_info *info); |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 274 | |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 275 | /** |
| 276 | * xt_recseq - recursive seqcount for netfilter use |
| 277 | * |
| 278 | * Packet processing changes the seqcount only if no recursion happened |
| 279 | * get_counters() can use read_seqcount_begin()/read_seqcount_retry(), |
| 280 | * because we use the normal seqcount convention : |
| 281 | * Low order bit set to 1 if a writer is active. |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 282 | */ |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 283 | DECLARE_PER_CPU(seqcount_t, xt_recseq); |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 284 | |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 285 | /** |
| 286 | * xt_write_recseq_begin - start of a write section |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 287 | * |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 288 | * Begin packet processing : all readers must wait the end |
| 289 | * 1) Must be called with preemption disabled |
Christoph Lameter | 933393f | 2011-12-22 11:58:51 -0600 | [diff] [blame] | 290 | * 2) softirqs must be disabled too (or we should use this_cpu_add()) |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 291 | * Returns : |
| 292 | * 1 if no recursion on this cpu |
| 293 | * 0 if recursion detected |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 294 | */ |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 295 | static inline unsigned int xt_write_recseq_begin(void) |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 296 | { |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 297 | unsigned int addend; |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 298 | |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 299 | /* |
| 300 | * Low order bit of sequence is set if we already |
| 301 | * called xt_write_recseq_begin(). |
| 302 | */ |
| 303 | addend = (__this_cpu_read(xt_recseq.sequence) + 1) & 1; |
| 304 | |
| 305 | /* |
| 306 | * This is kind of a write_seqcount_begin(), but addend is 0 or 1 |
| 307 | * We dont check addend value to avoid a test and conditional jump, |
| 308 | * since addend is most likely 1 |
| 309 | */ |
| 310 | __this_cpu_add(xt_recseq.sequence, addend); |
| 311 | smp_wmb(); |
| 312 | |
| 313 | return addend; |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 314 | } |
| 315 | |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 316 | /** |
| 317 | * xt_write_recseq_end - end of a write section |
| 318 | * @addend: return value from previous xt_write_recseq_begin() |
| 319 | * |
| 320 | * End packet processing : all readers can proceed |
| 321 | * 1) Must be called with preemption disabled |
Christoph Lameter | 933393f | 2011-12-22 11:58:51 -0600 | [diff] [blame] | 322 | * 2) softirqs must be disabled too (or we should use this_cpu_add()) |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 323 | */ |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 324 | static inline void xt_write_recseq_end(unsigned int addend) |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 325 | { |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 326 | /* this is kind of a write_seqcount_end(), but addend is 0 or 1 */ |
| 327 | smp_wmb(); |
| 328 | __this_cpu_add(xt_recseq.sequence, addend); |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 329 | } |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 330 | |
Eric Dumazet | b8dfe49 | 2009-03-25 17:31:52 +0100 | [diff] [blame] | 331 | /* |
| 332 | * This helper is performance critical and must be inlined |
| 333 | */ |
| 334 | static inline unsigned long ifname_compare_aligned(const char *_a, |
| 335 | const char *_b, |
| 336 | const char *_mask) |
| 337 | { |
| 338 | const unsigned long *a = (const unsigned long *)_a; |
| 339 | const unsigned long *b = (const unsigned long *)_b; |
| 340 | const unsigned long *mask = (const unsigned long *)_mask; |
| 341 | unsigned long ret; |
| 342 | |
| 343 | ret = (a[0] ^ b[0]) & mask[0]; |
| 344 | if (IFNAMSIZ > sizeof(unsigned long)) |
| 345 | ret |= (a[1] ^ b[1]) & mask[1]; |
| 346 | if (IFNAMSIZ > 2 * sizeof(unsigned long)) |
| 347 | ret |= (a[2] ^ b[2]) & mask[2]; |
| 348 | if (IFNAMSIZ > 3 * sizeof(unsigned long)) |
| 349 | ret |= (a[3] ^ b[3]) & mask[3]; |
| 350 | BUILD_BUG_ON(IFNAMSIZ > 4 * sizeof(unsigned long)); |
| 351 | return ret; |
| 352 | } |
| 353 | |
Joe Perches | a0f4ecf | 2013-09-26 14:48:15 -0700 | [diff] [blame] | 354 | struct nf_hook_ops *xt_hook_link(const struct xt_table *, nf_hookfn *); |
| 355 | void xt_hook_unlink(const struct xt_table *, struct nf_hook_ops *); |
Jan Engelhardt | 2b95efe | 2009-06-17 13:57:48 +0200 | [diff] [blame] | 356 | |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 357 | #ifdef CONFIG_COMPAT |
| 358 | #include <net/compat.h> |
| 359 | |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 360 | struct compat_xt_entry_match { |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 361 | union { |
| 362 | struct { |
| 363 | u_int16_t match_size; |
| 364 | char name[XT_FUNCTION_MAXNAMELEN - 1]; |
| 365 | u_int8_t revision; |
| 366 | } user; |
Patrick McHardy | 46c5ea3c | 2006-05-02 05:12:22 +0200 | [diff] [blame] | 367 | struct { |
| 368 | u_int16_t match_size; |
| 369 | compat_uptr_t match; |
| 370 | } kernel; |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 371 | u_int16_t match_size; |
| 372 | } u; |
| 373 | unsigned char data[0]; |
| 374 | }; |
| 375 | |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 376 | struct compat_xt_entry_target { |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 377 | union { |
| 378 | struct { |
| 379 | u_int16_t target_size; |
| 380 | char name[XT_FUNCTION_MAXNAMELEN - 1]; |
| 381 | u_int8_t revision; |
| 382 | } user; |
Patrick McHardy | 46c5ea3c | 2006-05-02 05:12:22 +0200 | [diff] [blame] | 383 | struct { |
| 384 | u_int16_t target_size; |
| 385 | compat_uptr_t target; |
| 386 | } kernel; |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 387 | u_int16_t target_size; |
| 388 | } u; |
| 389 | unsigned char data[0]; |
| 390 | }; |
| 391 | |
| 392 | /* FIXME: this works only on 32 bit tasks |
| 393 | * need to change whole approach in order to calculate align as function of |
| 394 | * current task alignment */ |
| 395 | |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 396 | struct compat_xt_counters { |
Alexey Dobriyan | 0a02604 | 2010-02-10 15:00:32 +0100 | [diff] [blame] | 397 | compat_u64 pcnt, bcnt; /* Packet and byte counters */ |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 398 | }; |
| 399 | |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 400 | struct compat_xt_counters_info { |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 401 | char name[XT_TABLE_MAXNAMELEN]; |
| 402 | compat_uint_t num_counters; |
| 403 | struct compat_xt_counters counters[0]; |
| 404 | }; |
| 405 | |
Alexey Dobriyan | 42107f5 | 2010-02-10 15:03:27 +0100 | [diff] [blame] | 406 | struct _compat_xt_align { |
| 407 | __u8 u8; |
| 408 | __u16 u16; |
| 409 | __u32 u32; |
| 410 | compat_u64 u64; |
| 411 | }; |
| 412 | |
Alexey Dobriyan | a79ff73 | 2010-04-13 11:21:46 +0200 | [diff] [blame] | 413 | #define COMPAT_XT_ALIGN(s) __ALIGN_KERNEL((s), __alignof__(struct _compat_xt_align)) |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 414 | |
Joe Perches | a0f4ecf | 2013-09-26 14:48:15 -0700 | [diff] [blame] | 415 | void xt_compat_lock(u_int8_t af); |
| 416 | void xt_compat_unlock(u_int8_t af); |
Patrick McHardy | 9fa492c | 2006-09-20 12:05:37 -0700 | [diff] [blame] | 417 | |
Joe Perches | a0f4ecf | 2013-09-26 14:48:15 -0700 | [diff] [blame] | 418 | int xt_compat_add_offset(u_int8_t af, unsigned int offset, int delta); |
| 419 | void xt_compat_flush_offsets(u_int8_t af); |
| 420 | void xt_compat_init_offsets(u_int8_t af, unsigned int number); |
| 421 | int xt_compat_calc_jump(u_int8_t af, unsigned int offset); |
Patrick McHardy | b386d9f | 2007-12-17 21:47:48 -0800 | [diff] [blame] | 422 | |
Joe Perches | a0f4ecf | 2013-09-26 14:48:15 -0700 | [diff] [blame] | 423 | int xt_compat_match_offset(const struct xt_match *match); |
| 424 | int xt_compat_match_from_user(struct xt_entry_match *m, void **dstptr, |
| 425 | unsigned int *size); |
| 426 | int xt_compat_match_to_user(const struct xt_entry_match *m, |
| 427 | void __user **dstptr, unsigned int *size); |
Patrick McHardy | 9fa492c | 2006-09-20 12:05:37 -0700 | [diff] [blame] | 428 | |
Joe Perches | a0f4ecf | 2013-09-26 14:48:15 -0700 | [diff] [blame] | 429 | int xt_compat_target_offset(const struct xt_target *target); |
| 430 | void xt_compat_target_from_user(struct xt_entry_target *t, void **dstptr, |
| 431 | unsigned int *size); |
| 432 | int xt_compat_target_to_user(const struct xt_entry_target *t, |
| 433 | void __user **dstptr, unsigned int *size); |
Dmitry Mishin | 2722971 | 2006-04-01 02:25:19 -0800 | [diff] [blame] | 434 | |
| 435 | #endif /* CONFIG_COMPAT */ |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 436 | #endif /* _X_TABLES_H */ |