Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1 | /* |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 2 | * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net> |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 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 | * |
| 8 | * Development of this code funded by Astaro AG (http://www.astaro.com/) |
| 9 | */ |
| 10 | |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/netlink.h> |
| 15 | #include <linux/netfilter.h> |
| 16 | #include <linux/netfilter/nf_tables.h> |
| 17 | #include <net/netfilter/nf_tables.h> |
| 18 | #include <net/netfilter/nf_conntrack.h> |
Florian Westphal | 48f66c9 | 2016-01-07 21:34:24 +0100 | [diff] [blame^] | 19 | #include <net/netfilter/nf_conntrack_acct.h> |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 20 | #include <net/netfilter/nf_conntrack_tuple.h> |
| 21 | #include <net/netfilter/nf_conntrack_helper.h> |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 22 | #include <net/netfilter/nf_conntrack_ecache.h> |
Florian Westphal | d2bf2f3 | 2014-02-18 15:25:32 +0100 | [diff] [blame] | 23 | #include <net/netfilter/nf_conntrack_labels.h> |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 24 | |
| 25 | struct nft_ct { |
| 26 | enum nft_ct_keys key:8; |
| 27 | enum ip_conntrack_dir dir:8; |
Patrick McHardy | d46f2cd | 2014-03-07 19:08:32 +0100 | [diff] [blame] | 28 | union { |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 29 | enum nft_registers dreg:8; |
| 30 | enum nft_registers sreg:8; |
| 31 | }; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 32 | }; |
| 33 | |
Florian Westphal | 48f66c9 | 2016-01-07 21:34:24 +0100 | [diff] [blame^] | 34 | static u64 nft_ct_get_eval_counter(const struct nf_conn_counter *c, |
| 35 | enum nft_ct_keys k, |
| 36 | enum ip_conntrack_dir d) |
| 37 | { |
| 38 | if (d < IP_CT_DIR_MAX) |
| 39 | return k == NFT_CT_BYTES ? atomic64_read(&c[d].bytes) : |
| 40 | atomic64_read(&c[d].packets); |
| 41 | |
| 42 | return nft_ct_get_eval_counter(c, k, IP_CT_DIR_ORIGINAL) + |
| 43 | nft_ct_get_eval_counter(c, k, IP_CT_DIR_REPLY); |
| 44 | } |
| 45 | |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 46 | static void nft_ct_get_eval(const struct nft_expr *expr, |
Patrick McHardy | a55e22e | 2015-04-11 02:27:31 +0100 | [diff] [blame] | 47 | struct nft_regs *regs, |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 48 | const struct nft_pktinfo *pkt) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 49 | { |
| 50 | const struct nft_ct *priv = nft_expr_priv(expr); |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 51 | u32 *dest = ®s->data[priv->dreg]; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 52 | enum ip_conntrack_info ctinfo; |
| 53 | const struct nf_conn *ct; |
| 54 | const struct nf_conn_help *help; |
| 55 | const struct nf_conntrack_tuple *tuple; |
| 56 | const struct nf_conntrack_helper *helper; |
| 57 | long diff; |
| 58 | unsigned int state; |
| 59 | |
| 60 | ct = nf_ct_get(pkt->skb, &ctinfo); |
| 61 | |
| 62 | switch (priv->key) { |
| 63 | case NFT_CT_STATE: |
| 64 | if (ct == NULL) |
| 65 | state = NF_CT_STATE_INVALID_BIT; |
| 66 | else if (nf_ct_is_untracked(ct)) |
| 67 | state = NF_CT_STATE_UNTRACKED_BIT; |
| 68 | else |
| 69 | state = NF_CT_STATE_BIT(ctinfo); |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 70 | *dest = state; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 71 | return; |
David Miller | c1f8667 | 2015-04-07 23:05:42 -0400 | [diff] [blame] | 72 | default: |
| 73 | break; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 74 | } |
| 75 | |
| 76 | if (ct == NULL) |
| 77 | goto err; |
| 78 | |
| 79 | switch (priv->key) { |
| 80 | case NFT_CT_DIRECTION: |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 81 | *dest = CTINFO2DIR(ctinfo); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 82 | return; |
| 83 | case NFT_CT_STATUS: |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 84 | *dest = ct->status; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 85 | return; |
| 86 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 87 | case NFT_CT_MARK: |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 88 | *dest = ct->mark; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 89 | return; |
| 90 | #endif |
| 91 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 92 | case NFT_CT_SECMARK: |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 93 | *dest = ct->secmark; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 94 | return; |
| 95 | #endif |
| 96 | case NFT_CT_EXPIRATION: |
| 97 | diff = (long)jiffies - (long)ct->timeout.expires; |
| 98 | if (diff < 0) |
| 99 | diff = 0; |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 100 | *dest = jiffies_to_msecs(diff); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 101 | return; |
| 102 | case NFT_CT_HELPER: |
| 103 | if (ct->master == NULL) |
| 104 | goto err; |
| 105 | help = nfct_help(ct->master); |
| 106 | if (help == NULL) |
| 107 | goto err; |
| 108 | helper = rcu_dereference(help->helper); |
| 109 | if (helper == NULL) |
| 110 | goto err; |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 111 | strncpy((char *)dest, helper->name, NF_CT_HELPER_NAME_LEN); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 112 | return; |
Florian Westphal | d2bf2f3 | 2014-02-18 15:25:32 +0100 | [diff] [blame] | 113 | #ifdef CONFIG_NF_CONNTRACK_LABELS |
| 114 | case NFT_CT_LABELS: { |
| 115 | struct nf_conn_labels *labels = nf_ct_labels_find(ct); |
| 116 | unsigned int size; |
| 117 | |
| 118 | if (!labels) { |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 119 | memset(dest, 0, NF_CT_LABELS_MAX_SIZE); |
Florian Westphal | d2bf2f3 | 2014-02-18 15:25:32 +0100 | [diff] [blame] | 120 | return; |
| 121 | } |
| 122 | |
Florian Westphal | d2bf2f3 | 2014-02-18 15:25:32 +0100 | [diff] [blame] | 123 | size = labels->words * sizeof(long); |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 124 | memcpy(dest, labels->bits, size); |
| 125 | if (size < NF_CT_LABELS_MAX_SIZE) |
| 126 | memset(((char *) dest) + size, 0, |
| 127 | NF_CT_LABELS_MAX_SIZE - size); |
Florian Westphal | d2bf2f3 | 2014-02-18 15:25:32 +0100 | [diff] [blame] | 128 | return; |
| 129 | } |
Florian Westphal | 48f66c9 | 2016-01-07 21:34:24 +0100 | [diff] [blame^] | 130 | case NFT_CT_BYTES: /* fallthrough */ |
| 131 | case NFT_CT_PKTS: { |
| 132 | const struct nf_conn_acct *acct = nf_conn_acct_find(ct); |
| 133 | u64 count = 0; |
| 134 | |
| 135 | if (acct) |
| 136 | count = nft_ct_get_eval_counter(acct->counter, |
| 137 | priv->key, priv->dir); |
| 138 | memcpy(dest, &count, sizeof(count)); |
| 139 | return; |
| 140 | } |
Florian Westphal | d2bf2f3 | 2014-02-18 15:25:32 +0100 | [diff] [blame] | 141 | #endif |
David Miller | c1f8667 | 2015-04-07 23:05:42 -0400 | [diff] [blame] | 142 | default: |
| 143 | break; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | tuple = &ct->tuplehash[priv->dir].tuple; |
| 147 | switch (priv->key) { |
| 148 | case NFT_CT_L3PROTOCOL: |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 149 | *dest = nf_ct_l3num(ct); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 150 | return; |
| 151 | case NFT_CT_SRC: |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 152 | memcpy(dest, tuple->src.u3.all, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 153 | nf_ct_l3num(ct) == NFPROTO_IPV4 ? 4 : 16); |
| 154 | return; |
| 155 | case NFT_CT_DST: |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 156 | memcpy(dest, tuple->dst.u3.all, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 157 | nf_ct_l3num(ct) == NFPROTO_IPV4 ? 4 : 16); |
| 158 | return; |
| 159 | case NFT_CT_PROTOCOL: |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 160 | *dest = nf_ct_protonum(ct); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 161 | return; |
| 162 | case NFT_CT_PROTO_SRC: |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 163 | *dest = (__force __u16)tuple->src.u.all; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 164 | return; |
| 165 | case NFT_CT_PROTO_DST: |
Patrick McHardy | fad136e | 2015-04-11 02:27:33 +0100 | [diff] [blame] | 166 | *dest = (__force __u16)tuple->dst.u.all; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 167 | return; |
David Miller | c1f8667 | 2015-04-07 23:05:42 -0400 | [diff] [blame] | 168 | default: |
| 169 | break; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 170 | } |
| 171 | return; |
| 172 | err: |
Patrick McHardy | a55e22e | 2015-04-11 02:27:31 +0100 | [diff] [blame] | 173 | regs->verdict.code = NFT_BREAK; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 174 | } |
| 175 | |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 176 | static void nft_ct_set_eval(const struct nft_expr *expr, |
Patrick McHardy | a55e22e | 2015-04-11 02:27:31 +0100 | [diff] [blame] | 177 | struct nft_regs *regs, |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 178 | const struct nft_pktinfo *pkt) |
| 179 | { |
| 180 | const struct nft_ct *priv = nft_expr_priv(expr); |
| 181 | struct sk_buff *skb = pkt->skb; |
Kristian Evensen | 847c8e2 | 2014-01-10 21:43:20 +0100 | [diff] [blame] | 182 | #ifdef CONFIG_NF_CONNTRACK_MARK |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 183 | u32 value = regs->data[priv->sreg]; |
Kristian Evensen | 847c8e2 | 2014-01-10 21:43:20 +0100 | [diff] [blame] | 184 | #endif |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 185 | enum ip_conntrack_info ctinfo; |
| 186 | struct nf_conn *ct; |
| 187 | |
| 188 | ct = nf_ct_get(skb, &ctinfo); |
| 189 | if (ct == NULL) |
| 190 | return; |
| 191 | |
| 192 | switch (priv->key) { |
| 193 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 194 | case NFT_CT_MARK: |
| 195 | if (ct->mark != value) { |
| 196 | ct->mark = value; |
| 197 | nf_conntrack_event_cache(IPCT_MARK, ct); |
| 198 | } |
| 199 | break; |
| 200 | #endif |
David Miller | c1f8667 | 2015-04-07 23:05:42 -0400 | [diff] [blame] | 201 | default: |
| 202 | break; |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 203 | } |
| 204 | } |
| 205 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 206 | static const struct nla_policy nft_ct_policy[NFTA_CT_MAX + 1] = { |
| 207 | [NFTA_CT_DREG] = { .type = NLA_U32 }, |
| 208 | [NFTA_CT_KEY] = { .type = NLA_U32 }, |
| 209 | [NFTA_CT_DIRECTION] = { .type = NLA_U8 }, |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 210 | [NFTA_CT_SREG] = { .type = NLA_U32 }, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 211 | }; |
| 212 | |
Patrick McHardy | 9638f33 | 2014-01-06 18:09:49 +0000 | [diff] [blame] | 213 | static int nft_ct_l3proto_try_module_get(uint8_t family) |
| 214 | { |
| 215 | int err; |
| 216 | |
| 217 | if (family == NFPROTO_INET) { |
| 218 | err = nf_ct_l3proto_try_module_get(NFPROTO_IPV4); |
| 219 | if (err < 0) |
| 220 | goto err1; |
| 221 | err = nf_ct_l3proto_try_module_get(NFPROTO_IPV6); |
| 222 | if (err < 0) |
| 223 | goto err2; |
| 224 | } else { |
| 225 | err = nf_ct_l3proto_try_module_get(family); |
| 226 | if (err < 0) |
| 227 | goto err1; |
| 228 | } |
| 229 | return 0; |
| 230 | |
| 231 | err2: |
| 232 | nf_ct_l3proto_module_put(NFPROTO_IPV4); |
| 233 | err1: |
| 234 | return err; |
| 235 | } |
| 236 | |
| 237 | static void nft_ct_l3proto_module_put(uint8_t family) |
| 238 | { |
| 239 | if (family == NFPROTO_INET) { |
| 240 | nf_ct_l3proto_module_put(NFPROTO_IPV4); |
| 241 | nf_ct_l3proto_module_put(NFPROTO_IPV6); |
| 242 | } else |
| 243 | nf_ct_l3proto_module_put(family); |
| 244 | } |
| 245 | |
Patrick McHardy | fe92ca4 | 2014-03-29 10:43:03 +0000 | [diff] [blame] | 246 | static int nft_ct_get_init(const struct nft_ctx *ctx, |
| 247 | const struct nft_expr *expr, |
| 248 | const struct nlattr * const tb[]) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 249 | { |
| 250 | struct nft_ct *priv = nft_expr_priv(expr); |
Patrick McHardy | 45d9bcd | 2015-04-11 02:27:26 +0100 | [diff] [blame] | 251 | unsigned int len; |
Patrick McHardy | fe92ca4 | 2014-03-29 10:43:03 +0000 | [diff] [blame] | 252 | int err; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 253 | |
Patrick McHardy | fe92ca4 | 2014-03-29 10:43:03 +0000 | [diff] [blame] | 254 | priv->key = ntohl(nla_get_be32(tb[NFTA_CT_KEY])); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 255 | switch (priv->key) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 256 | case NFT_CT_DIRECTION: |
Patrick McHardy | 45d9bcd | 2015-04-11 02:27:26 +0100 | [diff] [blame] | 257 | if (tb[NFTA_CT_DIRECTION] != NULL) |
| 258 | return -EINVAL; |
| 259 | len = sizeof(u8); |
| 260 | break; |
| 261 | case NFT_CT_STATE: |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 262 | case NFT_CT_STATUS: |
| 263 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 264 | case NFT_CT_MARK: |
| 265 | #endif |
| 266 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 267 | case NFT_CT_SECMARK: |
| 268 | #endif |
Patrick McHardy | 45d9bcd | 2015-04-11 02:27:26 +0100 | [diff] [blame] | 269 | case NFT_CT_EXPIRATION: |
| 270 | if (tb[NFTA_CT_DIRECTION] != NULL) |
| 271 | return -EINVAL; |
| 272 | len = sizeof(u32); |
| 273 | break; |
Florian Westphal | d2bf2f3 | 2014-02-18 15:25:32 +0100 | [diff] [blame] | 274 | #ifdef CONFIG_NF_CONNTRACK_LABELS |
| 275 | case NFT_CT_LABELS: |
Patrick McHardy | 45d9bcd | 2015-04-11 02:27:26 +0100 | [diff] [blame] | 276 | if (tb[NFTA_CT_DIRECTION] != NULL) |
| 277 | return -EINVAL; |
| 278 | len = NF_CT_LABELS_MAX_SIZE; |
| 279 | break; |
Florian Westphal | d2bf2f3 | 2014-02-18 15:25:32 +0100 | [diff] [blame] | 280 | #endif |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 281 | case NFT_CT_HELPER: |
| 282 | if (tb[NFTA_CT_DIRECTION] != NULL) |
| 283 | return -EINVAL; |
Patrick McHardy | 45d9bcd | 2015-04-11 02:27:26 +0100 | [diff] [blame] | 284 | len = NF_CT_HELPER_NAME_LEN; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 285 | break; |
Patrick McHardy | 45d9bcd | 2015-04-11 02:27:26 +0100 | [diff] [blame] | 286 | |
Patrick McHardy | 51292c0 | 2014-02-05 15:03:36 +0000 | [diff] [blame] | 287 | case NFT_CT_L3PROTOCOL: |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 288 | case NFT_CT_PROTOCOL: |
Patrick McHardy | 45d9bcd | 2015-04-11 02:27:26 +0100 | [diff] [blame] | 289 | if (tb[NFTA_CT_DIRECTION] == NULL) |
| 290 | return -EINVAL; |
| 291 | len = sizeof(u8); |
| 292 | break; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 293 | case NFT_CT_SRC: |
| 294 | case NFT_CT_DST: |
Patrick McHardy | 45d9bcd | 2015-04-11 02:27:26 +0100 | [diff] [blame] | 295 | if (tb[NFTA_CT_DIRECTION] == NULL) |
| 296 | return -EINVAL; |
| 297 | |
| 298 | switch (ctx->afi->family) { |
| 299 | case NFPROTO_IPV4: |
| 300 | len = FIELD_SIZEOF(struct nf_conntrack_tuple, |
| 301 | src.u3.ip); |
| 302 | break; |
| 303 | case NFPROTO_IPV6: |
| 304 | case NFPROTO_INET: |
| 305 | len = FIELD_SIZEOF(struct nf_conntrack_tuple, |
| 306 | src.u3.ip6); |
| 307 | break; |
| 308 | default: |
| 309 | return -EAFNOSUPPORT; |
| 310 | } |
| 311 | break; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 312 | case NFT_CT_PROTO_SRC: |
| 313 | case NFT_CT_PROTO_DST: |
| 314 | if (tb[NFTA_CT_DIRECTION] == NULL) |
| 315 | return -EINVAL; |
Patrick McHardy | 45d9bcd | 2015-04-11 02:27:26 +0100 | [diff] [blame] | 316 | len = FIELD_SIZEOF(struct nf_conntrack_tuple, src.u.all); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 317 | break; |
Florian Westphal | 48f66c9 | 2016-01-07 21:34:24 +0100 | [diff] [blame^] | 318 | case NFT_CT_BYTES: |
| 319 | case NFT_CT_PKTS: |
| 320 | /* no direction? return sum of original + reply */ |
| 321 | if (tb[NFTA_CT_DIRECTION] == NULL) |
| 322 | priv->dir = IP_CT_DIR_MAX; |
| 323 | len = sizeof(u64); |
| 324 | break; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 325 | default: |
| 326 | return -EOPNOTSUPP; |
| 327 | } |
| 328 | |
Patrick McHardy | fe92ca4 | 2014-03-29 10:43:03 +0000 | [diff] [blame] | 329 | if (tb[NFTA_CT_DIRECTION] != NULL) { |
| 330 | priv->dir = nla_get_u8(tb[NFTA_CT_DIRECTION]); |
| 331 | switch (priv->dir) { |
| 332 | case IP_CT_DIR_ORIGINAL: |
| 333 | case IP_CT_DIR_REPLY: |
| 334 | break; |
| 335 | default: |
| 336 | return -EINVAL; |
| 337 | } |
| 338 | } |
| 339 | |
Patrick McHardy | b1c96ed | 2015-04-11 02:27:36 +0100 | [diff] [blame] | 340 | priv->dreg = nft_parse_register(tb[NFTA_CT_DREG]); |
Patrick McHardy | 1ec1021 | 2015-04-11 02:27:27 +0100 | [diff] [blame] | 341 | err = nft_validate_register_store(ctx, priv->dreg, NULL, |
| 342 | NFT_DATA_VALUE, len); |
Patrick McHardy | fe92ca4 | 2014-03-29 10:43:03 +0000 | [diff] [blame] | 343 | if (err < 0) |
| 344 | return err; |
| 345 | |
| 346 | err = nft_ct_l3proto_try_module_get(ctx->afi->family); |
| 347 | if (err < 0) |
| 348 | return err; |
| 349 | |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 350 | return 0; |
| 351 | } |
| 352 | |
Patrick McHardy | fe92ca4 | 2014-03-29 10:43:03 +0000 | [diff] [blame] | 353 | static int nft_ct_set_init(const struct nft_ctx *ctx, |
| 354 | const struct nft_expr *expr, |
| 355 | const struct nlattr * const tb[]) |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 356 | { |
Patrick McHardy | fe92ca4 | 2014-03-29 10:43:03 +0000 | [diff] [blame] | 357 | struct nft_ct *priv = nft_expr_priv(expr); |
Patrick McHardy | d07db98 | 2015-04-11 02:27:30 +0100 | [diff] [blame] | 358 | unsigned int len; |
Patrick McHardy | fe92ca4 | 2014-03-29 10:43:03 +0000 | [diff] [blame] | 359 | int err; |
| 360 | |
| 361 | priv->key = ntohl(nla_get_be32(tb[NFTA_CT_KEY])); |
| 362 | switch (priv->key) { |
Patrick McHardy | e88e514 | 2014-03-29 10:43:01 +0000 | [diff] [blame] | 363 | #ifdef CONFIG_NF_CONNTRACK_MARK |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 364 | case NFT_CT_MARK: |
Patrick McHardy | d07db98 | 2015-04-11 02:27:30 +0100 | [diff] [blame] | 365 | len = FIELD_SIZEOF(struct nf_conn, mark); |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 366 | break; |
Patrick McHardy | e88e514 | 2014-03-29 10:43:01 +0000 | [diff] [blame] | 367 | #endif |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 368 | default: |
| 369 | return -EOPNOTSUPP; |
| 370 | } |
| 371 | |
Patrick McHardy | b1c96ed | 2015-04-11 02:27:36 +0100 | [diff] [blame] | 372 | priv->sreg = nft_parse_register(tb[NFTA_CT_SREG]); |
Patrick McHardy | d07db98 | 2015-04-11 02:27:30 +0100 | [diff] [blame] | 373 | err = nft_validate_register_load(priv->sreg, len); |
Patrick McHardy | fe92ca4 | 2014-03-29 10:43:03 +0000 | [diff] [blame] | 374 | if (err < 0) |
| 375 | return err; |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 376 | |
Patrick McHardy | 9638f33 | 2014-01-06 18:09:49 +0000 | [diff] [blame] | 377 | err = nft_ct_l3proto_try_module_get(ctx->afi->family); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 378 | if (err < 0) |
| 379 | return err; |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 380 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 381 | return 0; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 382 | } |
| 383 | |
Patrick McHardy | 62472bc | 2014-03-07 19:08:30 +0100 | [diff] [blame] | 384 | static void nft_ct_destroy(const struct nft_ctx *ctx, |
| 385 | const struct nft_expr *expr) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 386 | { |
Patrick McHardy | d46f2cd | 2014-03-07 19:08:32 +0100 | [diff] [blame] | 387 | nft_ct_l3proto_module_put(ctx->afi->family); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 388 | } |
| 389 | |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 390 | static int nft_ct_get_dump(struct sk_buff *skb, const struct nft_expr *expr) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 391 | { |
| 392 | const struct nft_ct *priv = nft_expr_priv(expr); |
| 393 | |
Patrick McHardy | b1c96ed | 2015-04-11 02:27:36 +0100 | [diff] [blame] | 394 | if (nft_dump_register(skb, NFTA_CT_DREG, priv->dreg)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 395 | goto nla_put_failure; |
| 396 | if (nla_put_be32(skb, NFTA_CT_KEY, htonl(priv->key))) |
| 397 | goto nla_put_failure; |
Arturo Borrero | 2a53bfb | 2014-01-17 02:28:45 +0100 | [diff] [blame] | 398 | |
| 399 | switch (priv->key) { |
| 400 | case NFT_CT_PROTOCOL: |
| 401 | case NFT_CT_SRC: |
| 402 | case NFT_CT_DST: |
| 403 | case NFT_CT_PROTO_SRC: |
| 404 | case NFT_CT_PROTO_DST: |
| 405 | if (nla_put_u8(skb, NFTA_CT_DIRECTION, priv->dir)) |
| 406 | goto nla_put_failure; |
Florian Westphal | 48f66c9 | 2016-01-07 21:34:24 +0100 | [diff] [blame^] | 407 | break; |
| 408 | case NFT_CT_BYTES: |
| 409 | case NFT_CT_PKTS: |
| 410 | if (priv->dir < IP_CT_DIR_MAX && |
| 411 | nla_put_u8(skb, NFTA_CT_DIRECTION, priv->dir)) |
| 412 | goto nla_put_failure; |
| 413 | break; |
Arturo Borrero | 2a53bfb | 2014-01-17 02:28:45 +0100 | [diff] [blame] | 414 | default: |
| 415 | break; |
| 416 | } |
| 417 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 418 | return 0; |
| 419 | |
| 420 | nla_put_failure: |
| 421 | return -1; |
| 422 | } |
| 423 | |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 424 | static int nft_ct_set_dump(struct sk_buff *skb, const struct nft_expr *expr) |
| 425 | { |
| 426 | const struct nft_ct *priv = nft_expr_priv(expr); |
| 427 | |
Patrick McHardy | b1c96ed | 2015-04-11 02:27:36 +0100 | [diff] [blame] | 428 | if (nft_dump_register(skb, NFTA_CT_SREG, priv->sreg)) |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 429 | goto nla_put_failure; |
| 430 | if (nla_put_be32(skb, NFTA_CT_KEY, htonl(priv->key))) |
| 431 | goto nla_put_failure; |
| 432 | return 0; |
| 433 | |
| 434 | nla_put_failure: |
| 435 | return -1; |
| 436 | } |
| 437 | |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 438 | static struct nft_expr_type nft_ct_type; |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 439 | static const struct nft_expr_ops nft_ct_get_ops = { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 440 | .type = &nft_ct_type, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 441 | .size = NFT_EXPR_SIZE(sizeof(struct nft_ct)), |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 442 | .eval = nft_ct_get_eval, |
Patrick McHardy | fe92ca4 | 2014-03-29 10:43:03 +0000 | [diff] [blame] | 443 | .init = nft_ct_get_init, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 444 | .destroy = nft_ct_destroy, |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 445 | .dump = nft_ct_get_dump, |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 446 | }; |
| 447 | |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 448 | static const struct nft_expr_ops nft_ct_set_ops = { |
| 449 | .type = &nft_ct_type, |
| 450 | .size = NFT_EXPR_SIZE(sizeof(struct nft_ct)), |
| 451 | .eval = nft_ct_set_eval, |
Patrick McHardy | fe92ca4 | 2014-03-29 10:43:03 +0000 | [diff] [blame] | 452 | .init = nft_ct_set_init, |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 453 | .destroy = nft_ct_destroy, |
| 454 | .dump = nft_ct_set_dump, |
| 455 | }; |
| 456 | |
| 457 | static const struct nft_expr_ops * |
| 458 | nft_ct_select_ops(const struct nft_ctx *ctx, |
| 459 | const struct nlattr * const tb[]) |
| 460 | { |
| 461 | if (tb[NFTA_CT_KEY] == NULL) |
| 462 | return ERR_PTR(-EINVAL); |
| 463 | |
| 464 | if (tb[NFTA_CT_DREG] && tb[NFTA_CT_SREG]) |
| 465 | return ERR_PTR(-EINVAL); |
| 466 | |
| 467 | if (tb[NFTA_CT_DREG]) |
| 468 | return &nft_ct_get_ops; |
| 469 | |
| 470 | if (tb[NFTA_CT_SREG]) |
| 471 | return &nft_ct_set_ops; |
| 472 | |
| 473 | return ERR_PTR(-EINVAL); |
| 474 | } |
| 475 | |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 476 | static struct nft_expr_type nft_ct_type __read_mostly = { |
| 477 | .name = "ct", |
Kristian Evensen | c4ede3d | 2014-01-07 16:43:54 +0100 | [diff] [blame] | 478 | .select_ops = &nft_ct_select_ops, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 479 | .policy = nft_ct_policy, |
| 480 | .maxattr = NFTA_CT_MAX, |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 481 | .owner = THIS_MODULE, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 482 | }; |
| 483 | |
| 484 | static int __init nft_ct_module_init(void) |
| 485 | { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 486 | return nft_register_expr(&nft_ct_type); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 487 | } |
| 488 | |
| 489 | static void __exit nft_ct_module_exit(void) |
| 490 | { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 491 | nft_unregister_expr(&nft_ct_type); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 492 | } |
| 493 | |
| 494 | module_init(nft_ct_module_init); |
| 495 | module_exit(nft_ct_module_exit); |
| 496 | |
| 497 | MODULE_LICENSE("GPL"); |
| 498 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); |
| 499 | MODULE_ALIAS_NFT_EXPR("ct"); |