Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * net/sched/ipt.c iptables target interface |
| 3 | * |
| 4 | *TODO: Add other tables. For now we only support the ipv4 table targets |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * Copyright: Jamal Hadi Salim (2002-4) |
| 12 | */ |
| 13 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/types.h> |
| 15 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/skbuff.h> |
| 19 | #include <linux/rtnetlink.h> |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/init.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 22 | #include <linux/slab.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 23 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <net/pkt_sched.h> |
| 25 | #include <linux/tc_act/tc_ipt.h> |
| 26 | #include <net/tc_act/tc_ipt.h> |
| 27 | |
| 28 | #include <linux/netfilter_ipv4/ip_tables.h> |
| 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 31 | #define IPT_TAB_MASK 15 |
| 32 | static struct tcf_common *tcf_ipt_ht[IPT_TAB_MASK + 1]; |
| 33 | static u32 ipt_idx_gen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | static DEFINE_RWLOCK(ipt_lock); |
| 35 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 36 | static struct tcf_hashinfo ipt_hash_info = { |
| 37 | .htab = tcf_ipt_ht, |
| 38 | .hmask = IPT_TAB_MASK, |
| 39 | .lock = &ipt_lock, |
| 40 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Jan Engelhardt | 87a2e70 | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 42 | static int ipt_init_target(struct xt_entry_target *t, char *table, unsigned int hook) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | { |
Jan Engelhardt | af5d6dc | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 44 | struct xt_tgchk_param par; |
Jan Engelhardt | e60a13e | 2007-02-07 15:12:33 -0800 | [diff] [blame] | 45 | struct xt_target *target; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | int ret = 0; |
| 47 | |
Patrick McHardy | 239a87c | 2007-02-02 00:40:36 -0800 | [diff] [blame] | 48 | target = xt_request_find_target(AF_INET, t->u.user.name, |
| 49 | t->u.user.revision); |
Jan Engelhardt | d2a7b6b | 2009-07-10 18:55:11 +0200 | [diff] [blame] | 50 | if (IS_ERR(target)) |
| 51 | return PTR_ERR(target); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | t->u.kernel.target = target; |
Jan Engelhardt | af5d6dc | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 54 | par.table = table; |
| 55 | par.entryinfo = NULL; |
| 56 | par.target = target; |
| 57 | par.targinfo = t->data; |
| 58 | par.hook_mask = hook; |
Jan Engelhardt | 916a917 | 2008-10-08 11:35:20 +0200 | [diff] [blame] | 59 | par.family = NFPROTO_IPV4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
Jan Engelhardt | 916a917 | 2008-10-08 11:35:20 +0200 | [diff] [blame] | 61 | ret = xt_check_target(&par, t->u.target_size - sizeof(*t), 0, false); |
Jan Engelhardt | 367c679 | 2008-10-08 11:35:17 +0200 | [diff] [blame] | 62 | if (ret < 0) { |
Patrick McHardy | 239a87c | 2007-02-02 00:40:36 -0800 | [diff] [blame] | 63 | module_put(t->u.kernel.target->me); |
Patrick McHardy | 18118cd | 2006-04-24 17:18:59 -0700 | [diff] [blame] | 64 | return ret; |
Patrick McHardy | 239a87c | 2007-02-02 00:40:36 -0800 | [diff] [blame] | 65 | } |
Jan Engelhardt | 367c679 | 2008-10-08 11:35:17 +0200 | [diff] [blame] | 66 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | } |
| 68 | |
Jan Engelhardt | 87a2e70 | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 69 | static void ipt_destroy_target(struct xt_entry_target *t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | { |
Jan Engelhardt | a2df164 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 71 | struct xt_tgdtor_param par = { |
| 72 | .target = t->u.kernel.target, |
| 73 | .targinfo = t->data, |
| 74 | }; |
| 75 | if (par.target->destroy != NULL) |
| 76 | par.target->destroy(&par); |
| 77 | module_put(par.target->me); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | } |
| 79 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 80 | static int tcf_ipt_release(struct tcf_ipt *ipt, int bind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | { |
| 82 | int ret = 0; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 83 | if (ipt) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | if (bind) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 85 | ipt->tcf_bindcnt--; |
| 86 | ipt->tcf_refcnt--; |
| 87 | if (ipt->tcf_bindcnt <= 0 && ipt->tcf_refcnt <= 0) { |
| 88 | ipt_destroy_target(ipt->tcfi_t); |
| 89 | kfree(ipt->tcfi_tname); |
| 90 | kfree(ipt->tcfi_t); |
| 91 | tcf_hash_destroy(&ipt->common, &ipt_hash_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | ret = ACT_P_DELETED; |
| 93 | } |
| 94 | } |
| 95 | return ret; |
| 96 | } |
| 97 | |
Patrick McHardy | 53b2bf3 | 2008-01-23 20:36:30 -0800 | [diff] [blame] | 98 | static const struct nla_policy ipt_policy[TCA_IPT_MAX + 1] = { |
| 99 | [TCA_IPT_TABLE] = { .type = NLA_STRING, .len = IFNAMSIZ }, |
| 100 | [TCA_IPT_HOOK] = { .type = NLA_U32 }, |
| 101 | [TCA_IPT_INDEX] = { .type = NLA_U32 }, |
Jan Engelhardt | 87a2e70 | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 102 | [TCA_IPT_TARG] = { .len = sizeof(struct xt_entry_target) }, |
Patrick McHardy | 53b2bf3 | 2008-01-23 20:36:30 -0800 | [diff] [blame] | 103 | }; |
| 104 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 105 | static int tcf_ipt_init(struct nlattr *nla, struct nlattr *est, |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 106 | struct tc_action *a, int ovr, int bind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | { |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 108 | struct nlattr *tb[TCA_IPT_MAX + 1]; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 109 | struct tcf_ipt *ipt; |
| 110 | struct tcf_common *pc; |
Jan Engelhardt | 87a2e70 | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 111 | struct xt_entry_target *td, *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | char *tname; |
| 113 | int ret = 0, err; |
| 114 | u32 hook = 0; |
| 115 | u32 index = 0; |
| 116 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 117 | if (nla == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | return -EINVAL; |
| 119 | |
Patrick McHardy | 53b2bf3 | 2008-01-23 20:36:30 -0800 | [diff] [blame] | 120 | err = nla_parse_nested(tb, TCA_IPT_MAX, nla, ipt_policy); |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 121 | if (err < 0) |
| 122 | return err; |
| 123 | |
Patrick McHardy | 53b2bf3 | 2008-01-23 20:36:30 -0800 | [diff] [blame] | 124 | if (tb[TCA_IPT_HOOK] == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | return -EINVAL; |
Patrick McHardy | 53b2bf3 | 2008-01-23 20:36:30 -0800 | [diff] [blame] | 126 | if (tb[TCA_IPT_TARG] == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | return -EINVAL; |
Patrick McHardy | 53b2bf3 | 2008-01-23 20:36:30 -0800 | [diff] [blame] | 128 | |
Jan Engelhardt | 87a2e70 | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 129 | td = (struct xt_entry_target *)nla_data(tb[TCA_IPT_TARG]); |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 130 | if (nla_len(tb[TCA_IPT_TARG]) < td->u.target_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | return -EINVAL; |
| 132 | |
Patrick McHardy | 53b2bf3 | 2008-01-23 20:36:30 -0800 | [diff] [blame] | 133 | if (tb[TCA_IPT_INDEX] != NULL) |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 134 | index = nla_get_u32(tb[TCA_IPT_INDEX]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 136 | pc = tcf_hash_check(index, a, bind, &ipt_hash_info); |
| 137 | if (!pc) { |
| 138 | pc = tcf_hash_create(index, est, a, sizeof(*ipt), bind, |
| 139 | &ipt_idx_gen, &ipt_hash_info); |
Stephen Hemminger | 0e991ec | 2008-11-25 21:12:32 -0800 | [diff] [blame] | 140 | if (IS_ERR(pc)) |
| 141 | return PTR_ERR(pc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | ret = ACT_P_CREATED; |
| 143 | } else { |
| 144 | if (!ovr) { |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 145 | tcf_ipt_release(to_ipt(pc), bind); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | return -EEXIST; |
| 147 | } |
| 148 | } |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 149 | ipt = to_ipt(pc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 151 | hook = nla_get_u32(tb[TCA_IPT_HOOK]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
| 153 | err = -ENOMEM; |
| 154 | tname = kmalloc(IFNAMSIZ, GFP_KERNEL); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 155 | if (unlikely(!tname)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | goto err1; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 157 | if (tb[TCA_IPT_TABLE] == NULL || |
| 158 | nla_strlcpy(tname, tb[TCA_IPT_TABLE], IFNAMSIZ) >= IFNAMSIZ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | strcpy(tname, "mangle"); |
| 160 | |
Arnaldo Carvalho de Melo | c7b1b24 | 2006-11-21 01:19:40 -0200 | [diff] [blame] | 161 | t = kmemdup(td, td->u.target_size, GFP_KERNEL); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 162 | if (unlikely(!t)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | goto err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
| 165 | if ((err = ipt_init_target(t, tname, hook)) < 0) |
| 166 | goto err3; |
| 167 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 168 | spin_lock_bh(&ipt->tcf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | if (ret != ACT_P_CREATED) { |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 170 | ipt_destroy_target(ipt->tcfi_t); |
| 171 | kfree(ipt->tcfi_tname); |
| 172 | kfree(ipt->tcfi_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | } |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 174 | ipt->tcfi_tname = tname; |
| 175 | ipt->tcfi_t = t; |
| 176 | ipt->tcfi_hook = hook; |
| 177 | spin_unlock_bh(&ipt->tcf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | if (ret == ACT_P_CREATED) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 179 | tcf_hash_insert(pc, &ipt_hash_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | return ret; |
| 181 | |
| 182 | err3: |
| 183 | kfree(t); |
| 184 | err2: |
| 185 | kfree(tname); |
| 186 | err1: |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 187 | kfree(pc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | return err; |
| 189 | } |
| 190 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 191 | static int tcf_ipt_cleanup(struct tc_action *a, int bind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | { |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 193 | struct tcf_ipt *ipt = a->priv; |
| 194 | return tcf_ipt_release(ipt, bind); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | } |
| 196 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 197 | static int tcf_ipt(struct sk_buff *skb, struct tc_action *a, |
| 198 | struct tcf_result *res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | { |
| 200 | int ret = 0, result = 0; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 201 | struct tcf_ipt *ipt = a->priv; |
Jan Engelhardt | 4b560b4 | 2009-07-05 19:43:26 +0200 | [diff] [blame] | 202 | struct xt_action_param par; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
| 204 | if (skb_cloned(skb)) { |
| 205 | if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) |
| 206 | return TC_ACT_UNSPEC; |
| 207 | } |
| 208 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 209 | spin_lock(&ipt->tcf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 211 | ipt->tcf_tm.lastuse = jiffies; |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 212 | ipt->tcf_bstats.bytes += qdisc_pkt_len(skb); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 213 | ipt->tcf_bstats.packets++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | |
| 215 | /* yes, we have to worry about both in and out dev |
| 216 | worry later - danger - this API seems to have changed |
| 217 | from earlier kernels */ |
Jan Engelhardt | 7eb3558 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 218 | par.in = skb->dev; |
| 219 | par.out = NULL; |
| 220 | par.hooknum = ipt->tcfi_hook; |
| 221 | par.target = ipt->tcfi_t->u.kernel.target; |
| 222 | par.targinfo = ipt->tcfi_t->data; |
| 223 | ret = par.target->target(skb, &par); |
| 224 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | switch (ret) { |
| 226 | case NF_ACCEPT: |
| 227 | result = TC_ACT_OK; |
| 228 | break; |
| 229 | case NF_DROP: |
| 230 | result = TC_ACT_SHOT; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 231 | ipt->tcf_qstats.drops++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | break; |
Jan Engelhardt | 243bf6e | 2010-10-13 16:28:00 +0200 | [diff] [blame] | 233 | case XT_CONTINUE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | result = TC_ACT_PIPE; |
| 235 | break; |
| 236 | default: |
| 237 | if (net_ratelimit()) |
stephen hemminger | 6ff9c36 | 2010-05-12 06:37:05 +0000 | [diff] [blame] | 238 | pr_notice("tc filter: Bogus netfilter code" |
| 239 | " %d assume ACCEPT\n", ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | result = TC_POLICE_OK; |
| 241 | break; |
| 242 | } |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 243 | spin_unlock(&ipt->tcf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | return result; |
| 245 | |
| 246 | } |
| 247 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 248 | static int tcf_ipt_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | { |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 250 | unsigned char *b = skb_tail_pointer(skb); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 251 | struct tcf_ipt *ipt = a->priv; |
Jan Engelhardt | 87a2e70 | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 252 | struct xt_entry_target *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | struct tcf_t tm; |
| 254 | struct tc_cnt c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | |
| 256 | /* for simple targets kernel size == user size |
| 257 | ** user name = target name |
| 258 | ** for foolproof you need to not assume this |
| 259 | */ |
| 260 | |
Arnaldo Carvalho de Melo | c7b1b24 | 2006-11-21 01:19:40 -0200 | [diff] [blame] | 261 | t = kmemdup(ipt->tcfi_t, ipt->tcfi_t->u.user.target_size, GFP_ATOMIC); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 262 | if (unlikely(!t)) |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 263 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 265 | c.bindcnt = ipt->tcf_bindcnt - bind; |
| 266 | c.refcnt = ipt->tcf_refcnt - ref; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 267 | strcpy(t->u.user.name, ipt->tcfi_t->u.kernel.target->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 269 | NLA_PUT(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t); |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 270 | NLA_PUT_U32(skb, TCA_IPT_INDEX, ipt->tcf_index); |
| 271 | NLA_PUT_U32(skb, TCA_IPT_HOOK, ipt->tcfi_hook); |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 272 | NLA_PUT(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c); |
Patrick McHardy | 57e1c48 | 2008-01-23 20:34:28 -0800 | [diff] [blame] | 273 | NLA_PUT_STRING(skb, TCA_IPT_TABLE, ipt->tcfi_tname); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 274 | tm.install = jiffies_to_clock_t(jiffies - ipt->tcf_tm.install); |
| 275 | tm.lastuse = jiffies_to_clock_t(jiffies - ipt->tcf_tm.lastuse); |
| 276 | tm.expires = jiffies_to_clock_t(ipt->tcf_tm.expires); |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 277 | NLA_PUT(skb, TCA_IPT_TM, sizeof (tm), &tm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | kfree(t); |
| 279 | return skb->len; |
| 280 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 281 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 282 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | kfree(t); |
| 284 | return -1; |
| 285 | } |
| 286 | |
| 287 | static struct tc_action_ops act_ipt_ops = { |
| 288 | .kind = "ipt", |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 289 | .hinfo = &ipt_hash_info, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | .type = TCA_ACT_IPT, |
| 291 | .capab = TCA_CAP_NONE, |
| 292 | .owner = THIS_MODULE, |
| 293 | .act = tcf_ipt, |
| 294 | .dump = tcf_ipt_dump, |
| 295 | .cleanup = tcf_ipt_cleanup, |
| 296 | .lookup = tcf_hash_search, |
| 297 | .init = tcf_ipt_init, |
| 298 | .walk = tcf_generic_walker |
| 299 | }; |
| 300 | |
| 301 | MODULE_AUTHOR("Jamal Hadi Salim(2002-4)"); |
| 302 | MODULE_DESCRIPTION("Iptables target actions"); |
| 303 | MODULE_LICENSE("GPL"); |
| 304 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 305 | static int __init ipt_init_module(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | { |
| 307 | return tcf_register_action(&act_ipt_ops); |
| 308 | } |
| 309 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 310 | static void __exit ipt_cleanup_module(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | { |
| 312 | tcf_unregister_action(&act_ipt_ops); |
| 313 | } |
| 314 | |
| 315 | module_init(ipt_init_module); |
| 316 | module_exit(ipt_cleanup_module); |