blob: b113fcac94e1c46be2fae6dd3eec2c5cbb19f40a [file] [log] [blame]
Pablo Neira Ayusoaf308b92018-08-02 20:51:39 +02001/* SPDX-License-Identifier: GPL-2.0 */
2#include <linux/kernel.h>
3#include <linux/init.h>
4#include <linux/module.h>
5#include <linux/seqlock.h>
6#include <linux/netlink.h>
7#include <linux/netfilter.h>
8#include <linux/netfilter/nf_tables.h>
9#include <net/netfilter/nf_tables.h>
10#include <net/dst_metadata.h>
11#include <net/ip_tunnels.h>
12#include <net/vxlan.h>
13#include <net/erspan.h>
14
Pablo Neira Ayusoaaecfdb2018-08-02 20:51:46 +020015struct nft_tunnel {
16 enum nft_tunnel_keys key:8;
17 enum nft_registers dreg:8;
wenxua46c52d2019-01-29 15:51:17 +080018 enum nft_tunnel_mode mode:8;
Pablo Neira Ayusoaaecfdb2018-08-02 20:51:46 +020019};
20
21static void nft_tunnel_get_eval(const struct nft_expr *expr,
22 struct nft_regs *regs,
23 const struct nft_pktinfo *pkt)
24{
25 const struct nft_tunnel *priv = nft_expr_priv(expr);
26 u32 *dest = &regs->data[priv->dreg];
27 struct ip_tunnel_info *tun_info;
28
29 tun_info = skb_tunnel_info(pkt->skb);
30
31 switch (priv->key) {
32 case NFT_TUNNEL_PATH:
wenxua46c52d2019-01-29 15:51:17 +080033 if (!tun_info) {
34 nft_reg_store8(dest, false);
35 return;
36 }
37 if (priv->mode == NFT_TUNNEL_MODE_NONE ||
38 (priv->mode == NFT_TUNNEL_MODE_RX &&
39 !(tun_info->mode & IP_TUNNEL_INFO_TX)) ||
40 (priv->mode == NFT_TUNNEL_MODE_TX &&
41 (tun_info->mode & IP_TUNNEL_INFO_TX)))
42 nft_reg_store8(dest, true);
43 else
44 nft_reg_store8(dest, false);
Pablo Neira Ayusoaaecfdb2018-08-02 20:51:46 +020045 break;
46 case NFT_TUNNEL_ID:
47 if (!tun_info) {
48 regs->verdict.code = NFT_BREAK;
49 return;
50 }
wenxua46c52d2019-01-29 15:51:17 +080051 if (priv->mode == NFT_TUNNEL_MODE_NONE ||
52 (priv->mode == NFT_TUNNEL_MODE_RX &&
53 !(tun_info->mode & IP_TUNNEL_INFO_TX)) ||
54 (priv->mode == NFT_TUNNEL_MODE_TX &&
55 (tun_info->mode & IP_TUNNEL_INFO_TX)))
56 *dest = ntohl(tunnel_id_to_key32(tun_info->key.tun_id));
57 else
58 regs->verdict.code = NFT_BREAK;
Pablo Neira Ayusoaaecfdb2018-08-02 20:51:46 +020059 break;
60 default:
61 WARN_ON(1);
62 regs->verdict.code = NFT_BREAK;
63 }
64}
65
66static const struct nla_policy nft_tunnel_policy[NFTA_TUNNEL_MAX + 1] = {
67 [NFTA_TUNNEL_KEY] = { .type = NLA_U32 },
68 [NFTA_TUNNEL_DREG] = { .type = NLA_U32 },
wenxua46c52d2019-01-29 15:51:17 +080069 [NFTA_TUNNEL_MODE] = { .type = NLA_U32 },
Pablo Neira Ayusoaaecfdb2018-08-02 20:51:46 +020070};
71
72static int nft_tunnel_get_init(const struct nft_ctx *ctx,
73 const struct nft_expr *expr,
74 const struct nlattr * const tb[])
75{
76 struct nft_tunnel *priv = nft_expr_priv(expr);
77 u32 len;
78
79 if (!tb[NFTA_TUNNEL_KEY] &&
80 !tb[NFTA_TUNNEL_DREG])
81 return -EINVAL;
82
83 priv->key = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY]));
84 switch (priv->key) {
85 case NFT_TUNNEL_PATH:
86 len = sizeof(u8);
87 break;
88 case NFT_TUNNEL_ID:
89 len = sizeof(u32);
90 break;
91 default:
92 return -EOPNOTSUPP;
93 }
94
95 priv->dreg = nft_parse_register(tb[NFTA_TUNNEL_DREG]);
96
wenxua46c52d2019-01-29 15:51:17 +080097 if (tb[NFTA_TUNNEL_MODE]) {
98 priv->mode = ntohl(nla_get_be32(tb[NFTA_TUNNEL_MODE]));
99 if (priv->mode > NFT_TUNNEL_MODE_MAX)
100 return -EOPNOTSUPP;
101 } else {
102 priv->mode = NFT_TUNNEL_MODE_NONE;
103 }
104
Pablo Neira Ayusoaaecfdb2018-08-02 20:51:46 +0200105 return nft_validate_register_store(ctx, priv->dreg, NULL,
106 NFT_DATA_VALUE, len);
107}
108
109static int nft_tunnel_get_dump(struct sk_buff *skb,
110 const struct nft_expr *expr)
111{
112 const struct nft_tunnel *priv = nft_expr_priv(expr);
113
114 if (nla_put_be32(skb, NFTA_TUNNEL_KEY, htonl(priv->key)))
115 goto nla_put_failure;
116 if (nft_dump_register(skb, NFTA_TUNNEL_DREG, priv->dreg))
117 goto nla_put_failure;
wenxua46c52d2019-01-29 15:51:17 +0800118 if (nla_put_be32(skb, NFTA_TUNNEL_MODE, htonl(priv->mode)))
119 goto nla_put_failure;
Pablo Neira Ayusoaaecfdb2018-08-02 20:51:46 +0200120 return 0;
121
122nla_put_failure:
123 return -1;
124}
125
126static struct nft_expr_type nft_tunnel_type;
127static const struct nft_expr_ops nft_tunnel_get_ops = {
128 .type = &nft_tunnel_type,
129 .size = NFT_EXPR_SIZE(sizeof(struct nft_tunnel)),
130 .eval = nft_tunnel_get_eval,
131 .init = nft_tunnel_get_init,
132 .dump = nft_tunnel_get_dump,
133};
134
135static struct nft_expr_type nft_tunnel_type __read_mostly = {
136 .name = "tunnel",
137 .ops = &nft_tunnel_get_ops,
138 .policy = nft_tunnel_policy,
139 .maxattr = NFTA_TUNNEL_MAX,
140 .owner = THIS_MODULE,
141};
142
Pablo Neira Ayusoaf308b92018-08-02 20:51:39 +0200143struct nft_tunnel_opts {
144 union {
145 struct vxlan_metadata vxlan;
146 struct erspan_metadata erspan;
147 } u;
148 u32 len;
Pablo Neira Ayuso483f3fd2018-08-04 00:31:48 +0200149 __be16 flags;
Pablo Neira Ayusoaf308b92018-08-02 20:51:39 +0200150};
151
152struct nft_tunnel_obj {
153 struct metadata_dst *md;
154 struct nft_tunnel_opts opts;
155};
156
157static const struct nla_policy nft_tunnel_ip_policy[NFTA_TUNNEL_KEY_IP_MAX + 1] = {
158 [NFTA_TUNNEL_KEY_IP_SRC] = { .type = NLA_U32 },
159 [NFTA_TUNNEL_KEY_IP_DST] = { .type = NLA_U32 },
160};
161
162static int nft_tunnel_obj_ip_init(const struct nft_ctx *ctx,
163 const struct nlattr *attr,
164 struct ip_tunnel_info *info)
165{
166 struct nlattr *tb[NFTA_TUNNEL_KEY_IP_MAX + 1];
167 int err;
168
169 err = nla_parse_nested(tb, NFTA_TUNNEL_KEY_IP_MAX, attr,
170 nft_tunnel_ip_policy, NULL);
171 if (err < 0)
172 return err;
173
174 if (!tb[NFTA_TUNNEL_KEY_IP_DST])
175 return -EINVAL;
176
177 if (tb[NFTA_TUNNEL_KEY_IP_SRC])
178 info->key.u.ipv4.src = nla_get_be32(tb[NFTA_TUNNEL_KEY_IP_SRC]);
179 if (tb[NFTA_TUNNEL_KEY_IP_DST])
180 info->key.u.ipv4.dst = nla_get_be32(tb[NFTA_TUNNEL_KEY_IP_DST]);
181
182 return 0;
183}
184
185static const struct nla_policy nft_tunnel_ip6_policy[NFTA_TUNNEL_KEY_IP6_MAX + 1] = {
186 [NFTA_TUNNEL_KEY_IP6_SRC] = { .len = sizeof(struct in6_addr), },
187 [NFTA_TUNNEL_KEY_IP6_DST] = { .len = sizeof(struct in6_addr), },
188 [NFTA_TUNNEL_KEY_IP6_FLOWLABEL] = { .type = NLA_U32, }
189};
190
191static int nft_tunnel_obj_ip6_init(const struct nft_ctx *ctx,
192 const struct nlattr *attr,
193 struct ip_tunnel_info *info)
194{
195 struct nlattr *tb[NFTA_TUNNEL_KEY_IP6_MAX + 1];
196 int err;
197
198 err = nla_parse_nested(tb, NFTA_TUNNEL_KEY_IP6_MAX, attr,
199 nft_tunnel_ip6_policy, NULL);
200 if (err < 0)
201 return err;
202
203 if (!tb[NFTA_TUNNEL_KEY_IP6_DST])
204 return -EINVAL;
205
206 if (tb[NFTA_TUNNEL_KEY_IP6_SRC]) {
207 memcpy(&info->key.u.ipv6.src,
208 nla_data(tb[NFTA_TUNNEL_KEY_IP6_SRC]),
209 sizeof(struct in6_addr));
210 }
211 if (tb[NFTA_TUNNEL_KEY_IP6_DST]) {
212 memcpy(&info->key.u.ipv6.dst,
213 nla_data(tb[NFTA_TUNNEL_KEY_IP6_DST]),
214 sizeof(struct in6_addr));
215 }
216 if (tb[NFTA_TUNNEL_KEY_IP6_FLOWLABEL])
217 info->key.label = nla_get_be32(tb[NFTA_TUNNEL_KEY_IP6_FLOWLABEL]);
218
219 info->mode |= IP_TUNNEL_INFO_IPV6;
220
221 return 0;
222}
223
224static const struct nla_policy nft_tunnel_opts_vxlan_policy[NFTA_TUNNEL_KEY_VXLAN_MAX + 1] = {
225 [NFTA_TUNNEL_KEY_VXLAN_GBP] = { .type = NLA_U32 },
226};
227
228static int nft_tunnel_obj_vxlan_init(const struct nlattr *attr,
229 struct nft_tunnel_opts *opts)
230{
231 struct nlattr *tb[NFTA_TUNNEL_KEY_VXLAN_MAX + 1];
232 int err;
233
234 err = nla_parse_nested(tb, NFTA_TUNNEL_KEY_VXLAN_MAX, attr,
235 nft_tunnel_opts_vxlan_policy, NULL);
236 if (err < 0)
237 return err;
238
239 if (!tb[NFTA_TUNNEL_KEY_VXLAN_GBP])
240 return -EINVAL;
241
242 opts->u.vxlan.gbp = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY_VXLAN_GBP]));
243
244 opts->len = sizeof(struct vxlan_metadata);
245 opts->flags = TUNNEL_VXLAN_OPT;
246
247 return 0;
248}
249
250static const struct nla_policy nft_tunnel_opts_erspan_policy[NFTA_TUNNEL_KEY_ERSPAN_MAX + 1] = {
251 [NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX] = { .type = NLA_U32 },
252 [NFTA_TUNNEL_KEY_ERSPAN_V2_DIR] = { .type = NLA_U8 },
253 [NFTA_TUNNEL_KEY_ERSPAN_V2_HWID] = { .type = NLA_U8 },
254};
255
256static int nft_tunnel_obj_erspan_init(const struct nlattr *attr,
257 struct nft_tunnel_opts *opts)
258{
259 struct nlattr *tb[NFTA_TUNNEL_KEY_ERSPAN_MAX + 1];
260 uint8_t hwid, dir;
261 int err, version;
262
263 err = nla_parse_nested(tb, NFTA_TUNNEL_KEY_ERSPAN_MAX, attr,
264 nft_tunnel_opts_erspan_policy, NULL);
265 if (err < 0)
266 return err;
267
268 version = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY_ERSPAN_VERSION]));
269 switch (version) {
270 case ERSPAN_VERSION:
271 if (!tb[NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX])
272 return -EINVAL;
273
274 opts->u.erspan.u.index =
275 nla_get_be32(tb[NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX]);
276 break;
277 case ERSPAN_VERSION2:
278 if (!tb[NFTA_TUNNEL_KEY_ERSPAN_V2_DIR] ||
279 !tb[NFTA_TUNNEL_KEY_ERSPAN_V2_HWID])
280 return -EINVAL;
281
282 hwid = nla_get_u8(tb[NFTA_TUNNEL_KEY_ERSPAN_V2_HWID]);
283 dir = nla_get_u8(tb[NFTA_TUNNEL_KEY_ERSPAN_V2_DIR]);
284
285 set_hwid(&opts->u.erspan.u.md2, hwid);
286 opts->u.erspan.u.md2.dir = dir;
287 break;
288 default:
289 return -EOPNOTSUPP;
290 }
291 opts->u.erspan.version = version;
292
293 opts->len = sizeof(struct erspan_metadata);
294 opts->flags = TUNNEL_ERSPAN_OPT;
295
296 return 0;
297}
298
299static const struct nla_policy nft_tunnel_opts_policy[NFTA_TUNNEL_KEY_OPTS_MAX + 1] = {
300 [NFTA_TUNNEL_KEY_OPTS_VXLAN] = { .type = NLA_NESTED, },
301 [NFTA_TUNNEL_KEY_OPTS_ERSPAN] = { .type = NLA_NESTED, },
302};
303
304static int nft_tunnel_obj_opts_init(const struct nft_ctx *ctx,
305 const struct nlattr *attr,
306 struct ip_tunnel_info *info,
307 struct nft_tunnel_opts *opts)
308{
309 struct nlattr *tb[NFTA_TUNNEL_KEY_OPTS_MAX + 1];
310 int err;
311
312 err = nla_parse_nested(tb, NFTA_TUNNEL_KEY_OPTS_MAX, attr,
313 nft_tunnel_opts_policy, NULL);
314 if (err < 0)
315 return err;
316
317 if (tb[NFTA_TUNNEL_KEY_OPTS_VXLAN]) {
318 err = nft_tunnel_obj_vxlan_init(tb[NFTA_TUNNEL_KEY_OPTS_VXLAN],
319 opts);
320 } else if (tb[NFTA_TUNNEL_KEY_OPTS_ERSPAN]) {
321 err = nft_tunnel_obj_erspan_init(tb[NFTA_TUNNEL_KEY_OPTS_ERSPAN],
322 opts);
323 } else {
324 return -EOPNOTSUPP;
325 }
326
327 return err;
328}
329
330static const struct nla_policy nft_tunnel_key_policy[NFTA_TUNNEL_KEY_MAX + 1] = {
331 [NFTA_TUNNEL_KEY_IP] = { .type = NLA_NESTED, },
332 [NFTA_TUNNEL_KEY_IP6] = { .type = NLA_NESTED, },
333 [NFTA_TUNNEL_KEY_ID] = { .type = NLA_U32, },
334 [NFTA_TUNNEL_KEY_FLAGS] = { .type = NLA_U32, },
335 [NFTA_TUNNEL_KEY_TOS] = { .type = NLA_U8, },
336 [NFTA_TUNNEL_KEY_TTL] = { .type = NLA_U8, },
337 [NFTA_TUNNEL_KEY_OPTS] = { .type = NLA_NESTED, },
338};
339
340static int nft_tunnel_obj_init(const struct nft_ctx *ctx,
341 const struct nlattr * const tb[],
342 struct nft_object *obj)
343{
344 struct nft_tunnel_obj *priv = nft_obj_data(obj);
345 struct ip_tunnel_info info;
346 struct metadata_dst *md;
347 int err;
348
349 if (!tb[NFTA_TUNNEL_KEY_ID])
350 return -EINVAL;
351
352 memset(&info, 0, sizeof(info));
353 info.mode = IP_TUNNEL_INFO_TX;
354 info.key.tun_id = key32_to_tunnel_id(nla_get_be32(tb[NFTA_TUNNEL_KEY_ID]));
355 info.key.tun_flags = TUNNEL_KEY | TUNNEL_CSUM | TUNNEL_NOCACHE;
356
357 if (tb[NFTA_TUNNEL_KEY_IP]) {
358 err = nft_tunnel_obj_ip_init(ctx, tb[NFTA_TUNNEL_KEY_IP], &info);
359 if (err < 0)
360 return err;
361 } else if (tb[NFTA_TUNNEL_KEY_IP6]) {
362 err = nft_tunnel_obj_ip6_init(ctx, tb[NFTA_TUNNEL_KEY_IP6], &info);
363 if (err < 0)
364 return err;
365 } else {
366 return -EINVAL;
367 }
368
369 if (tb[NFTA_TUNNEL_KEY_SPORT]) {
Pablo Neira Ayuso483f3fd2018-08-04 00:31:48 +0200370 info.key.tp_src = nla_get_be16(tb[NFTA_TUNNEL_KEY_SPORT]);
Pablo Neira Ayusoaf308b92018-08-02 20:51:39 +0200371 }
372 if (tb[NFTA_TUNNEL_KEY_DPORT]) {
Pablo Neira Ayuso483f3fd2018-08-04 00:31:48 +0200373 info.key.tp_dst = nla_get_be16(tb[NFTA_TUNNEL_KEY_DPORT]);
Pablo Neira Ayusoaf308b92018-08-02 20:51:39 +0200374 }
375
376 if (tb[NFTA_TUNNEL_KEY_FLAGS]) {
377 u32 tun_flags;
378
379 tun_flags = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY_FLAGS]));
380 if (tun_flags & ~NFT_TUNNEL_F_MASK)
381 return -EOPNOTSUPP;
382
383 if (tun_flags & NFT_TUNNEL_F_ZERO_CSUM_TX)
384 info.key.tun_flags &= ~TUNNEL_CSUM;
385 if (tun_flags & NFT_TUNNEL_F_DONT_FRAGMENT)
386 info.key.tun_flags |= TUNNEL_DONT_FRAGMENT;
387 if (tun_flags & NFT_TUNNEL_F_SEQ_NUMBER)
388 info.key.tun_flags |= TUNNEL_SEQ;
389 }
390 if (tb[NFTA_TUNNEL_KEY_TOS])
391 info.key.tos = nla_get_u8(tb[NFTA_TUNNEL_KEY_TOS]);
392 if (tb[NFTA_TUNNEL_KEY_TTL])
393 info.key.ttl = nla_get_u8(tb[NFTA_TUNNEL_KEY_TTL]);
394 else
395 info.key.ttl = U8_MAX;
396
397 if (tb[NFTA_TUNNEL_KEY_OPTS]) {
398 err = nft_tunnel_obj_opts_init(ctx, tb[NFTA_TUNNEL_KEY_OPTS],
399 &info, &priv->opts);
400 if (err < 0)
401 return err;
402 }
403
404 md = metadata_dst_alloc(priv->opts.len, METADATA_IP_TUNNEL, GFP_KERNEL);
405 if (!md)
406 return -ENOMEM;
407
408 memcpy(&md->u.tun_info, &info, sizeof(info));
wenxu3e511d52019-02-22 17:00:43 +0800409#ifdef CONFIG_DST_CACHE
410 err = dst_cache_init(&md->u.tun_info.dst_cache, GFP_KERNEL);
411 if (err < 0) {
412 metadata_dst_free(md);
413 return err;
414 }
415#endif
Pablo Neira Ayusoaf308b92018-08-02 20:51:39 +0200416 ip_tunnel_info_opts_set(&md->u.tun_info, &priv->opts.u, priv->opts.len,
417 priv->opts.flags);
418 priv->md = md;
419
420 return 0;
421}
422
423static inline void nft_tunnel_obj_eval(struct nft_object *obj,
424 struct nft_regs *regs,
425 const struct nft_pktinfo *pkt)
426{
427 struct nft_tunnel_obj *priv = nft_obj_data(obj);
428 struct sk_buff *skb = pkt->skb;
429
430 skb_dst_drop(skb);
431 dst_hold((struct dst_entry *) priv->md);
432 skb_dst_set(skb, (struct dst_entry *) priv->md);
433}
434
435static int nft_tunnel_ip_dump(struct sk_buff *skb, struct ip_tunnel_info *info)
436{
437 struct nlattr *nest;
438
439 if (info->mode & IP_TUNNEL_INFO_IPV6) {
440 nest = nla_nest_start(skb, NFTA_TUNNEL_KEY_IP6);
441 if (!nest)
442 return -1;
443
444 if (nla_put_in6_addr(skb, NFTA_TUNNEL_KEY_IP6_SRC, &info->key.u.ipv6.src) < 0 ||
445 nla_put_in6_addr(skb, NFTA_TUNNEL_KEY_IP6_DST, &info->key.u.ipv6.dst) < 0 ||
446 nla_put_be32(skb, NFTA_TUNNEL_KEY_IP6_FLOWLABEL, info->key.label))
447 return -1;
448
449 nla_nest_end(skb, nest);
450 } else {
451 nest = nla_nest_start(skb, NFTA_TUNNEL_KEY_IP);
452 if (!nest)
453 return -1;
454
455 if (nla_put_in_addr(skb, NFTA_TUNNEL_KEY_IP_SRC, info->key.u.ipv4.src) < 0 ||
456 nla_put_in_addr(skb, NFTA_TUNNEL_KEY_IP_DST, info->key.u.ipv4.dst) < 0)
457 return -1;
458
459 nla_nest_end(skb, nest);
460 }
461
462 return 0;
463}
464
465static int nft_tunnel_opts_dump(struct sk_buff *skb,
466 struct nft_tunnel_obj *priv)
467{
468 struct nft_tunnel_opts *opts = &priv->opts;
469 struct nlattr *nest;
470
471 nest = nla_nest_start(skb, NFTA_TUNNEL_KEY_OPTS);
472 if (!nest)
473 return -1;
474
475 if (opts->flags & TUNNEL_VXLAN_OPT) {
476 if (nla_put_be32(skb, NFTA_TUNNEL_KEY_VXLAN_GBP,
477 htonl(opts->u.vxlan.gbp)))
478 return -1;
479 } else if (opts->flags & TUNNEL_ERSPAN_OPT) {
480 switch (opts->u.erspan.version) {
481 case ERSPAN_VERSION:
482 if (nla_put_be32(skb, NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX,
483 opts->u.erspan.u.index))
484 return -1;
485 break;
486 case ERSPAN_VERSION2:
487 if (nla_put_u8(skb, NFTA_TUNNEL_KEY_ERSPAN_V2_HWID,
488 get_hwid(&opts->u.erspan.u.md2)) ||
489 nla_put_u8(skb, NFTA_TUNNEL_KEY_ERSPAN_V2_DIR,
490 opts->u.erspan.u.md2.dir))
491 return -1;
492 break;
493 }
494 }
495 nla_nest_end(skb, nest);
496
497 return 0;
498}
499
500static int nft_tunnel_ports_dump(struct sk_buff *skb,
501 struct ip_tunnel_info *info)
502{
503 if (nla_put_be16(skb, NFTA_TUNNEL_KEY_SPORT, htons(info->key.tp_src)) < 0 ||
504 nla_put_be16(skb, NFTA_TUNNEL_KEY_DPORT, htons(info->key.tp_dst)) < 0)
505 return -1;
506
507 return 0;
508}
509
510static int nft_tunnel_flags_dump(struct sk_buff *skb,
511 struct ip_tunnel_info *info)
512{
513 u32 flags = 0;
514
515 if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT)
516 flags |= NFT_TUNNEL_F_DONT_FRAGMENT;
517 if (!(info->key.tun_flags & TUNNEL_CSUM))
518 flags |= NFT_TUNNEL_F_ZERO_CSUM_TX;
519 if (info->key.tun_flags & TUNNEL_SEQ)
520 flags |= NFT_TUNNEL_F_SEQ_NUMBER;
521
522 if (nla_put_be32(skb, NFTA_TUNNEL_KEY_FLAGS, htonl(flags)) < 0)
523 return -1;
524
525 return 0;
526}
527
528static int nft_tunnel_obj_dump(struct sk_buff *skb,
529 struct nft_object *obj, bool reset)
530{
531 struct nft_tunnel_obj *priv = nft_obj_data(obj);
532 struct ip_tunnel_info *info = &priv->md->u.tun_info;
533
534 if (nla_put_be32(skb, NFTA_TUNNEL_KEY_ID,
535 tunnel_id_to_key32(info->key.tun_id)) ||
536 nft_tunnel_ip_dump(skb, info) < 0 ||
537 nft_tunnel_ports_dump(skb, info) < 0 ||
538 nft_tunnel_flags_dump(skb, info) < 0 ||
539 nla_put_u8(skb, NFTA_TUNNEL_KEY_TOS, info->key.tos) ||
540 nla_put_u8(skb, NFTA_TUNNEL_KEY_TTL, info->key.ttl) ||
541 nft_tunnel_opts_dump(skb, priv) < 0)
542 goto nla_put_failure;
543
544 return 0;
545
546nla_put_failure:
547 return -1;
548}
549
550static void nft_tunnel_obj_destroy(const struct nft_ctx *ctx,
551 struct nft_object *obj)
552{
553 struct nft_tunnel_obj *priv = nft_obj_data(obj);
554
555 metadata_dst_free(priv->md);
556}
557
558static struct nft_object_type nft_tunnel_obj_type;
559static const struct nft_object_ops nft_tunnel_obj_ops = {
560 .type = &nft_tunnel_obj_type,
561 .size = sizeof(struct nft_tunnel_obj),
562 .eval = nft_tunnel_obj_eval,
563 .init = nft_tunnel_obj_init,
564 .destroy = nft_tunnel_obj_destroy,
565 .dump = nft_tunnel_obj_dump,
566};
567
568static struct nft_object_type nft_tunnel_obj_type __read_mostly = {
569 .type = NFT_OBJECT_TUNNEL,
570 .ops = &nft_tunnel_obj_ops,
571 .maxattr = NFTA_TUNNEL_KEY_MAX,
572 .policy = nft_tunnel_key_policy,
573 .owner = THIS_MODULE,
574};
575
576static int __init nft_tunnel_module_init(void)
577{
Pablo Neira Ayusoaaecfdb2018-08-02 20:51:46 +0200578 int err;
579
580 err = nft_register_expr(&nft_tunnel_type);
581 if (err < 0)
582 return err;
583
584 err = nft_register_obj(&nft_tunnel_obj_type);
585 if (err < 0)
586 nft_unregister_expr(&nft_tunnel_type);
587
588 return err;
Pablo Neira Ayusoaf308b92018-08-02 20:51:39 +0200589}
590
591static void __exit nft_tunnel_module_exit(void)
592{
593 nft_unregister_obj(&nft_tunnel_obj_type);
Pablo Neira Ayusoaaecfdb2018-08-02 20:51:46 +0200594 nft_unregister_expr(&nft_tunnel_type);
Pablo Neira Ayusoaf308b92018-08-02 20:51:39 +0200595}
596
597module_init(nft_tunnel_module_init);
598module_exit(nft_tunnel_module_exit);
599
600MODULE_LICENSE("GPL");
601MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
Pablo Neira Ayusoaaecfdb2018-08-02 20:51:46 +0200602MODULE_ALIAS_NFT_EXPR("tunnel");
Pablo Neira Ayusoaf308b92018-08-02 20:51:39 +0200603MODULE_ALIAS_NFT_OBJ(NFT_OBJECT_TUNNEL);