Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2010 Patrick McHardy <kaber@trash.net> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | */ |
Jan Engelhardt | a7fed76 | 2011-04-21 11:05:14 +0200 | [diff] [blame] | 8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 9 | #include <linux/module.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 10 | #include <linux/gfp.h> |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 11 | #include <linux/skbuff.h> |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 12 | #include <linux/netfilter_ipv4/ip_tables.h> |
| 13 | #include <linux/netfilter_ipv6/ip6_tables.h> |
| 14 | #include <linux/netfilter/x_tables.h> |
| 15 | #include <linux/netfilter/xt_CT.h> |
| 16 | #include <net/netfilter/nf_conntrack.h> |
Pablo Neira Ayuso | eeb4cb9 | 2012-03-23 00:02:07 +0100 | [diff] [blame] | 17 | #include <net/netfilter/nf_conntrack_l4proto.h> |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 18 | #include <net/netfilter/nf_conntrack_helper.h> |
| 19 | #include <net/netfilter/nf_conntrack_ecache.h> |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 20 | #include <net/netfilter/nf_conntrack_timeout.h> |
Patrick McHardy | 5d0aa2c | 2010-02-15 18:13:33 +0100 | [diff] [blame] | 21 | #include <net/netfilter/nf_conntrack_zones.h> |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 22 | |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 23 | static unsigned int xt_ct_target_v0(struct sk_buff *skb, |
| 24 | const struct xt_action_param *par) |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 25 | { |
| 26 | const struct xt_ct_target_info *info = par->targinfo; |
| 27 | struct nf_conn *ct = info->ct; |
| 28 | |
| 29 | /* Previously seen (loopback)? Ignore. */ |
| 30 | if (skb->nfct != NULL) |
| 31 | return XT_CONTINUE; |
| 32 | |
| 33 | atomic_inc(&ct->ct_general.use); |
| 34 | skb->nfct = &ct->ct_general; |
| 35 | skb->nfctinfo = IP_CT_NEW; |
| 36 | |
| 37 | return XT_CONTINUE; |
| 38 | } |
| 39 | |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 40 | static unsigned int xt_ct_target_v1(struct sk_buff *skb, |
| 41 | const struct xt_action_param *par) |
| 42 | { |
| 43 | const struct xt_ct_target_info_v1 *info = par->targinfo; |
| 44 | struct nf_conn *ct = info->ct; |
| 45 | |
| 46 | /* Previously seen (loopback)? Ignore. */ |
| 47 | if (skb->nfct != NULL) |
| 48 | return XT_CONTINUE; |
| 49 | |
| 50 | atomic_inc(&ct->ct_general.use); |
| 51 | skb->nfct = &ct->ct_general; |
| 52 | skb->nfctinfo = IP_CT_NEW; |
| 53 | |
| 54 | return XT_CONTINUE; |
| 55 | } |
| 56 | |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 57 | static u8 xt_ct_find_proto(const struct xt_tgchk_param *par) |
| 58 | { |
Jan Engelhardt | 076f783 | 2010-03-11 00:38:44 +0100 | [diff] [blame] | 59 | if (par->family == NFPROTO_IPV4) { |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 60 | const struct ipt_entry *e = par->entryinfo; |
| 61 | |
| 62 | if (e->ip.invflags & IPT_INV_PROTO) |
| 63 | return 0; |
| 64 | return e->ip.proto; |
Jan Engelhardt | 076f783 | 2010-03-11 00:38:44 +0100 | [diff] [blame] | 65 | } else if (par->family == NFPROTO_IPV6) { |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 66 | const struct ip6t_entry *e = par->entryinfo; |
| 67 | |
| 68 | if (e->ipv6.invflags & IP6T_INV_PROTO) |
| 69 | return 0; |
| 70 | return e->ipv6.proto; |
| 71 | } else |
| 72 | return 0; |
| 73 | } |
| 74 | |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 75 | static int xt_ct_tg_check_v0(const struct xt_tgchk_param *par) |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 76 | { |
| 77 | struct xt_ct_target_info *info = par->targinfo; |
| 78 | struct nf_conntrack_tuple t; |
| 79 | struct nf_conn_help *help; |
| 80 | struct nf_conn *ct; |
Jan Engelhardt | 4a5a5c7 | 2010-03-19 17:32:59 +0100 | [diff] [blame] | 81 | int ret = 0; |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 82 | u8 proto; |
| 83 | |
Pablo Neira Ayuso | 9bf0464 | 2012-01-15 16:57:12 +0100 | [diff] [blame] | 84 | if (info->flags & ~XT_CT_NOTRACK) |
| 85 | return -EINVAL; |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 86 | |
| 87 | if (info->flags & XT_CT_NOTRACK) { |
Eric Dumazet | 5bfddbd | 2010-06-08 16:09:52 +0200 | [diff] [blame] | 88 | ct = nf_ct_untracked_get(); |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 89 | atomic_inc(&ct->ct_general.use); |
| 90 | goto out; |
| 91 | } |
| 92 | |
Patrick McHardy | 5d0aa2c | 2010-02-15 18:13:33 +0100 | [diff] [blame] | 93 | #ifndef CONFIG_NF_CONNTRACK_ZONES |
| 94 | if (info->zone) |
| 95 | goto err1; |
| 96 | #endif |
| 97 | |
Jan Engelhardt | 4a5a5c7 | 2010-03-19 17:32:59 +0100 | [diff] [blame] | 98 | ret = nf_ct_l3proto_try_module_get(par->family); |
| 99 | if (ret < 0) |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 100 | goto err1; |
| 101 | |
| 102 | memset(&t, 0, sizeof(t)); |
Patrick McHardy | 5d0aa2c | 2010-02-15 18:13:33 +0100 | [diff] [blame] | 103 | ct = nf_conntrack_alloc(par->net, info->zone, &t, &t, GFP_KERNEL); |
Jan Engelhardt | 4a5a5c7 | 2010-03-19 17:32:59 +0100 | [diff] [blame] | 104 | ret = PTR_ERR(ct); |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 105 | if (IS_ERR(ct)) |
| 106 | goto err2; |
| 107 | |
Jan Engelhardt | 4a5a5c7 | 2010-03-19 17:32:59 +0100 | [diff] [blame] | 108 | ret = 0; |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 109 | if ((info->ct_events || info->exp_events) && |
| 110 | !nf_ct_ecache_ext_add(ct, info->ct_events, info->exp_events, |
| 111 | GFP_KERNEL)) |
| 112 | goto err3; |
| 113 | |
Pablo Neira Ayuso | 9bf0464 | 2012-01-15 16:57:12 +0100 | [diff] [blame] | 114 | if (info->helper[0]) { |
Pablo Neira Ayuso | 1afc567 | 2012-06-07 12:11:50 +0200 | [diff] [blame] | 115 | struct nf_conntrack_helper *helper; |
| 116 | |
Jan Engelhardt | 4a5a5c7 | 2010-03-19 17:32:59 +0100 | [diff] [blame] | 117 | ret = -ENOENT; |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 118 | proto = xt_ct_find_proto(par); |
Jan Engelhardt | a7fed76 | 2011-04-21 11:05:14 +0200 | [diff] [blame] | 119 | if (!proto) { |
| 120 | pr_info("You must specify a L4 protocol, " |
| 121 | "and not use inversions on it.\n"); |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 122 | goto err3; |
Jan Engelhardt | a7fed76 | 2011-04-21 11:05:14 +0200 | [diff] [blame] | 123 | } |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 124 | |
Jan Engelhardt | 4a5a5c7 | 2010-03-19 17:32:59 +0100 | [diff] [blame] | 125 | ret = -ENOENT; |
Pablo Neira Ayuso | 1afc567 | 2012-06-07 12:11:50 +0200 | [diff] [blame] | 126 | helper = nf_conntrack_helper_try_module_get(info->helper, |
| 127 | par->family, |
| 128 | proto); |
| 129 | if (helper == NULL) { |
Jan Engelhardt | a7fed76 | 2011-04-21 11:05:14 +0200 | [diff] [blame] | 130 | pr_info("No such helper \"%s\"\n", info->helper); |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 131 | goto err3; |
Jan Engelhardt | a7fed76 | 2011-04-21 11:05:14 +0200 | [diff] [blame] | 132 | } |
Pablo Neira Ayuso | 1afc567 | 2012-06-07 12:11:50 +0200 | [diff] [blame] | 133 | |
| 134 | ret = -ENOMEM; |
| 135 | help = nf_ct_helper_ext_add(ct, helper, GFP_KERNEL); |
| 136 | if (help == NULL) |
| 137 | goto err3; |
| 138 | |
| 139 | help->helper = helper; |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 140 | } |
| 141 | |
| 142 | __set_bit(IPS_TEMPLATE_BIT, &ct->status); |
| 143 | __set_bit(IPS_CONFIRMED_BIT, &ct->status); |
| 144 | out: |
| 145 | info->ct = ct; |
Jan Engelhardt | d6b00a5 | 2010-03-25 16:34:45 +0100 | [diff] [blame] | 146 | return 0; |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 147 | |
| 148 | err3: |
| 149 | nf_conntrack_free(ct); |
| 150 | err2: |
| 151 | nf_ct_l3proto_module_put(par->family); |
| 152 | err1: |
Jan Engelhardt | 4a5a5c7 | 2010-03-19 17:32:59 +0100 | [diff] [blame] | 153 | return ret; |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 154 | } |
| 155 | |
Pablo Neira Ayuso | ee14186 | 2012-04-03 14:50:07 +0200 | [diff] [blame] | 156 | #ifdef CONFIG_NF_CONNTRACK_TIMEOUT |
| 157 | static void __xt_ct_tg_timeout_put(struct ctnl_timeout *timeout) |
| 158 | { |
| 159 | typeof(nf_ct_timeout_put_hook) timeout_put; |
| 160 | |
| 161 | timeout_put = rcu_dereference(nf_ct_timeout_put_hook); |
| 162 | if (timeout_put) |
| 163 | timeout_put(timeout); |
| 164 | } |
| 165 | #endif |
| 166 | |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 167 | static int xt_ct_tg_check_v1(const struct xt_tgchk_param *par) |
| 168 | { |
| 169 | struct xt_ct_target_info_v1 *info = par->targinfo; |
| 170 | struct nf_conntrack_tuple t; |
| 171 | struct nf_conn_help *help; |
| 172 | struct nf_conn *ct; |
| 173 | int ret = 0; |
| 174 | u8 proto; |
Pablo Neira Ayuso | ee14186 | 2012-04-03 14:50:07 +0200 | [diff] [blame] | 175 | #ifdef CONFIG_NF_CONNTRACK_TIMEOUT |
| 176 | struct ctnl_timeout *timeout; |
| 177 | #endif |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 178 | if (info->flags & ~XT_CT_NOTRACK) |
| 179 | return -EINVAL; |
| 180 | |
| 181 | if (info->flags & XT_CT_NOTRACK) { |
| 182 | ct = nf_ct_untracked_get(); |
| 183 | atomic_inc(&ct->ct_general.use); |
| 184 | goto out; |
| 185 | } |
| 186 | |
| 187 | #ifndef CONFIG_NF_CONNTRACK_ZONES |
| 188 | if (info->zone) |
| 189 | goto err1; |
| 190 | #endif |
| 191 | |
| 192 | ret = nf_ct_l3proto_try_module_get(par->family); |
| 193 | if (ret < 0) |
| 194 | goto err1; |
| 195 | |
| 196 | memset(&t, 0, sizeof(t)); |
| 197 | ct = nf_conntrack_alloc(par->net, info->zone, &t, &t, GFP_KERNEL); |
| 198 | ret = PTR_ERR(ct); |
| 199 | if (IS_ERR(ct)) |
| 200 | goto err2; |
| 201 | |
| 202 | ret = 0; |
| 203 | if ((info->ct_events || info->exp_events) && |
| 204 | !nf_ct_ecache_ext_add(ct, info->ct_events, info->exp_events, |
| 205 | GFP_KERNEL)) |
| 206 | goto err3; |
| 207 | |
| 208 | if (info->helper[0]) { |
Pablo Neira Ayuso | 1afc567 | 2012-06-07 12:11:50 +0200 | [diff] [blame] | 209 | struct nf_conntrack_helper *helper; |
| 210 | |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 211 | ret = -ENOENT; |
| 212 | proto = xt_ct_find_proto(par); |
| 213 | if (!proto) { |
| 214 | pr_info("You must specify a L4 protocol, " |
| 215 | "and not use inversions on it.\n"); |
| 216 | goto err3; |
| 217 | } |
| 218 | |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 219 | ret = -ENOENT; |
Pablo Neira Ayuso | 1afc567 | 2012-06-07 12:11:50 +0200 | [diff] [blame] | 220 | helper = nf_conntrack_helper_try_module_get(info->helper, |
| 221 | par->family, |
| 222 | proto); |
| 223 | if (helper == NULL) { |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 224 | pr_info("No such helper \"%s\"\n", info->helper); |
| 225 | goto err3; |
| 226 | } |
Pablo Neira Ayuso | 1afc567 | 2012-06-07 12:11:50 +0200 | [diff] [blame] | 227 | |
| 228 | ret = -ENOMEM; |
| 229 | help = nf_ct_helper_ext_add(ct, helper, GFP_KERNEL); |
| 230 | if (help == NULL) |
| 231 | goto err3; |
| 232 | |
| 233 | help->helper = helper; |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | #ifdef CONFIG_NF_CONNTRACK_TIMEOUT |
Pablo Neira Ayuso | 6cf5185 | 2012-04-27 02:00:50 +0200 | [diff] [blame] | 237 | if (info->timeout[0]) { |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 238 | typeof(nf_ct_timeout_find_get_hook) timeout_find_get; |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 239 | struct nf_conn_timeout *timeout_ext; |
| 240 | |
Pablo Neira Ayuso | 1ac0bf9 | 2012-03-22 23:58:41 +0100 | [diff] [blame] | 241 | rcu_read_lock(); |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 242 | timeout_find_get = |
| 243 | rcu_dereference(nf_ct_timeout_find_get_hook); |
| 244 | |
| 245 | if (timeout_find_get) { |
| 246 | const struct ipt_entry *e = par->entryinfo; |
Pablo Neira Ayuso | eeb4cb9 | 2012-03-23 00:02:07 +0100 | [diff] [blame] | 247 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 248 | |
| 249 | if (e->ip.invflags & IPT_INV_PROTO) { |
| 250 | ret = -EINVAL; |
| 251 | pr_info("You cannot use inversion on " |
| 252 | "L4 protocol\n"); |
Pablo Neira Ayuso | 1ac0bf9 | 2012-03-22 23:58:41 +0100 | [diff] [blame] | 253 | goto err4; |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 254 | } |
| 255 | timeout = timeout_find_get(info->timeout); |
| 256 | if (timeout == NULL) { |
| 257 | ret = -ENOENT; |
| 258 | pr_info("No such timeout policy \"%s\"\n", |
| 259 | info->timeout); |
Pablo Neira Ayuso | 1ac0bf9 | 2012-03-22 23:58:41 +0100 | [diff] [blame] | 260 | goto err4; |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 261 | } |
| 262 | if (timeout->l3num != par->family) { |
| 263 | ret = -EINVAL; |
| 264 | pr_info("Timeout policy `%s' can only be " |
| 265 | "used by L3 protocol number %d\n", |
| 266 | info->timeout, timeout->l3num); |
Pablo Neira Ayuso | ee14186 | 2012-04-03 14:50:07 +0200 | [diff] [blame] | 267 | goto err5; |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 268 | } |
Pablo Neira Ayuso | eeb4cb9 | 2012-03-23 00:02:07 +0100 | [diff] [blame] | 269 | /* Make sure the timeout policy matches any existing |
| 270 | * protocol tracker, otherwise default to generic. |
| 271 | */ |
| 272 | l4proto = __nf_ct_l4proto_find(par->family, |
| 273 | e->ip.proto); |
| 274 | if (timeout->l4proto->l4proto != l4proto->l4proto) { |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 275 | ret = -EINVAL; |
| 276 | pr_info("Timeout policy `%s' can only be " |
| 277 | "used by L4 protocol number %d\n", |
Pablo Neira Ayuso | c1ebd7d | 2012-03-22 23:40:01 +0100 | [diff] [blame] | 278 | info->timeout, |
| 279 | timeout->l4proto->l4proto); |
Pablo Neira Ayuso | ee14186 | 2012-04-03 14:50:07 +0200 | [diff] [blame] | 280 | goto err5; |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 281 | } |
| 282 | timeout_ext = nf_ct_timeout_ext_add(ct, timeout, |
Pablo Neira Ayuso | ca53e44 | 2012-04-03 12:32:15 +0200 | [diff] [blame] | 283 | GFP_ATOMIC); |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 284 | if (timeout_ext == NULL) { |
| 285 | ret = -ENOMEM; |
Pablo Neira Ayuso | ee14186 | 2012-04-03 14:50:07 +0200 | [diff] [blame] | 286 | goto err5; |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 287 | } |
| 288 | } else { |
| 289 | ret = -ENOENT; |
| 290 | pr_info("Timeout policy base is empty\n"); |
Pablo Neira Ayuso | 1ac0bf9 | 2012-03-22 23:58:41 +0100 | [diff] [blame] | 291 | goto err4; |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 292 | } |
Pablo Neira Ayuso | 1ac0bf9 | 2012-03-22 23:58:41 +0100 | [diff] [blame] | 293 | rcu_read_unlock(); |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 294 | } |
| 295 | #endif |
| 296 | |
| 297 | __set_bit(IPS_TEMPLATE_BIT, &ct->status); |
| 298 | __set_bit(IPS_CONFIRMED_BIT, &ct->status); |
| 299 | out: |
| 300 | info->ct = ct; |
| 301 | return 0; |
| 302 | |
Pablo Neira Ayuso | 44b52bc | 2012-04-03 10:08:48 +0200 | [diff] [blame] | 303 | #ifdef CONFIG_NF_CONNTRACK_TIMEOUT |
Pablo Neira Ayuso | ee14186 | 2012-04-03 14:50:07 +0200 | [diff] [blame] | 304 | err5: |
| 305 | __xt_ct_tg_timeout_put(timeout); |
Pablo Neira Ayuso | 1ac0bf9 | 2012-03-22 23:58:41 +0100 | [diff] [blame] | 306 | err4: |
| 307 | rcu_read_unlock(); |
Pablo Neira Ayuso | 44b52bc | 2012-04-03 10:08:48 +0200 | [diff] [blame] | 308 | #endif |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 309 | err3: |
| 310 | nf_conntrack_free(ct); |
| 311 | err2: |
| 312 | nf_ct_l3proto_module_put(par->family); |
| 313 | err1: |
| 314 | return ret; |
| 315 | } |
| 316 | |
| 317 | static void xt_ct_tg_destroy_v0(const struct xt_tgdtor_param *par) |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 318 | { |
| 319 | struct xt_ct_target_info *info = par->targinfo; |
| 320 | struct nf_conn *ct = info->ct; |
| 321 | struct nf_conn_help *help; |
| 322 | |
Eric Dumazet | 5bfddbd | 2010-06-08 16:09:52 +0200 | [diff] [blame] | 323 | if (!nf_ct_is_untracked(ct)) { |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 324 | help = nfct_help(ct); |
| 325 | if (help) |
| 326 | module_put(help->helper->me); |
| 327 | |
| 328 | nf_ct_l3proto_module_put(par->family); |
| 329 | } |
| 330 | nf_ct_put(info->ct); |
| 331 | } |
| 332 | |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 333 | static void xt_ct_tg_destroy_v1(const struct xt_tgdtor_param *par) |
| 334 | { |
| 335 | struct xt_ct_target_info_v1 *info = par->targinfo; |
| 336 | struct nf_conn *ct = info->ct; |
| 337 | struct nf_conn_help *help; |
| 338 | #ifdef CONFIG_NF_CONNTRACK_TIMEOUT |
| 339 | struct nf_conn_timeout *timeout_ext; |
| 340 | typeof(nf_ct_timeout_put_hook) timeout_put; |
| 341 | #endif |
| 342 | if (!nf_ct_is_untracked(ct)) { |
| 343 | help = nfct_help(ct); |
| 344 | if (help) |
| 345 | module_put(help->helper->me); |
| 346 | |
| 347 | nf_ct_l3proto_module_put(par->family); |
| 348 | |
| 349 | #ifdef CONFIG_NF_CONNTRACK_TIMEOUT |
Pablo Neira Ayuso | 1ac0bf9 | 2012-03-22 23:58:41 +0100 | [diff] [blame] | 350 | rcu_read_lock(); |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 351 | timeout_put = rcu_dereference(nf_ct_timeout_put_hook); |
| 352 | |
| 353 | if (timeout_put) { |
| 354 | timeout_ext = nf_ct_timeout_find(ct); |
| 355 | if (timeout_ext) |
| 356 | timeout_put(timeout_ext->timeout); |
| 357 | } |
Pablo Neira Ayuso | 1ac0bf9 | 2012-03-22 23:58:41 +0100 | [diff] [blame] | 358 | rcu_read_unlock(); |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 359 | #endif |
| 360 | } |
| 361 | nf_ct_put(info->ct); |
| 362 | } |
| 363 | |
| 364 | static struct xt_target xt_ct_tg_reg[] __read_mostly = { |
| 365 | { |
| 366 | .name = "CT", |
| 367 | .family = NFPROTO_UNSPEC, |
| 368 | .targetsize = sizeof(struct xt_ct_target_info), |
| 369 | .checkentry = xt_ct_tg_check_v0, |
| 370 | .destroy = xt_ct_tg_destroy_v0, |
| 371 | .target = xt_ct_target_v0, |
| 372 | .table = "raw", |
| 373 | .me = THIS_MODULE, |
| 374 | }, |
| 375 | { |
| 376 | .name = "CT", |
| 377 | .family = NFPROTO_UNSPEC, |
| 378 | .revision = 1, |
| 379 | .targetsize = sizeof(struct xt_ct_target_info_v1), |
| 380 | .checkentry = xt_ct_tg_check_v1, |
| 381 | .destroy = xt_ct_tg_destroy_v1, |
| 382 | .target = xt_ct_target_v1, |
| 383 | .table = "raw", |
| 384 | .me = THIS_MODULE, |
| 385 | }, |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 386 | }; |
| 387 | |
| 388 | static int __init xt_ct_tg_init(void) |
| 389 | { |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 390 | return xt_register_targets(xt_ct_tg_reg, ARRAY_SIZE(xt_ct_tg_reg)); |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 391 | } |
| 392 | |
| 393 | static void __exit xt_ct_tg_exit(void) |
| 394 | { |
Pablo Neira Ayuso | 24de58f | 2012-02-29 02:19:19 +0100 | [diff] [blame] | 395 | xt_unregister_targets(xt_ct_tg_reg, ARRAY_SIZE(xt_ct_tg_reg)); |
Patrick McHardy | 84f3bb9 | 2010-02-03 17:17:06 +0100 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | module_init(xt_ct_tg_init); |
| 399 | module_exit(xt_ct_tg_exit); |
| 400 | |
| 401 | MODULE_LICENSE("GPL"); |
| 402 | MODULE_DESCRIPTION("Xtables: connection tracking target"); |
| 403 | MODULE_ALIAS("ipt_CT"); |
| 404 | MODULE_ALIAS("ip6t_CT"); |