Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * xfrm_input.c | |
4 | * | |
5 | * Changes: | |
6 | * YOSHIFUJI Hideaki @USAGI | |
7 | * Split up af-specific portion | |
a716c119 | 8 | * |
1da177e4 LT |
9 | */ |
10 | ||
acf568ee | 11 | #include <linux/bottom_half.h> |
f8c3d0dd | 12 | #include <linux/cache.h> |
acf568ee | 13 | #include <linux/interrupt.h> |
1da177e4 LT |
14 | #include <linux/slab.h> |
15 | #include <linux/module.h> | |
716062fd | 16 | #include <linux/netdevice.h> |
acf568ee | 17 | #include <linux/percpu.h> |
716062fd | 18 | #include <net/dst.h> |
1da177e4 LT |
19 | #include <net/ip.h> |
20 | #include <net/xfrm.h> | |
049f8e2e AD |
21 | #include <net/ip_tunnels.h> |
22 | #include <net/ip6_tunnel.h> | |
abc340b3 | 23 | #include <net/dst_metadata.h> |
1da177e4 | 24 | |
b3284df1 FW |
25 | #include "xfrm_inout.h" |
26 | ||
acf568ee | 27 | struct xfrm_trans_tasklet { |
4f492066 LJ |
28 | struct work_struct work; |
29 | spinlock_t queue_lock; | |
acf568ee HX |
30 | struct sk_buff_head queue; |
31 | }; | |
32 | ||
33 | struct xfrm_trans_cb { | |
9a3fb9fb SK |
34 | union { |
35 | struct inet_skb_parm h4; | |
36 | #if IS_ENABLED(CONFIG_IPV6) | |
37 | struct inet6_skb_parm h6; | |
38 | #endif | |
39 | } header; | |
acf568ee | 40 | int (*finish)(struct net *net, struct sock *sk, struct sk_buff *skb); |
7b380192 | 41 | struct net *net; |
acf568ee HX |
42 | }; |
43 | ||
44 | #define XFRM_TRANS_SKB_CB(__skb) ((struct xfrm_trans_cb *)&((__skb)->cb[0])) | |
45 | ||
2f32b51b | 46 | static DEFINE_SPINLOCK(xfrm_input_afinfo_lock); |
1475ee0a | 47 | static struct xfrm_input_afinfo const __rcu *xfrm_input_afinfo[2][AF_INET6 + 1]; |
2f32b51b | 48 | |
1995876a SK |
49 | static struct gro_cells gro_cells; |
50 | static struct net_device xfrm_napi_dev; | |
51 | ||
acf568ee HX |
52 | static DEFINE_PER_CPU(struct xfrm_trans_tasklet, xfrm_trans_tasklet); |
53 | ||
960fdfde | 54 | int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo) |
2f32b51b SK |
55 | { |
56 | int err = 0; | |
57 | ||
1475ee0a | 58 | if (WARN_ON(afinfo->family > AF_INET6)) |
2f32b51b | 59 | return -EAFNOSUPPORT; |
960fdfde | 60 | |
2f32b51b | 61 | spin_lock_bh(&xfrm_input_afinfo_lock); |
1475ee0a | 62 | if (unlikely(xfrm_input_afinfo[afinfo->is_ipip][afinfo->family])) |
f31e8d4f | 63 | err = -EEXIST; |
2f32b51b | 64 | else |
1475ee0a | 65 | rcu_assign_pointer(xfrm_input_afinfo[afinfo->is_ipip][afinfo->family], afinfo); |
2f32b51b SK |
66 | spin_unlock_bh(&xfrm_input_afinfo_lock); |
67 | return err; | |
68 | } | |
69 | EXPORT_SYMBOL(xfrm_input_register_afinfo); | |
70 | ||
960fdfde | 71 | int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo) |
2f32b51b SK |
72 | { |
73 | int err = 0; | |
74 | ||
2f32b51b | 75 | spin_lock_bh(&xfrm_input_afinfo_lock); |
1475ee0a XL |
76 | if (likely(xfrm_input_afinfo[afinfo->is_ipip][afinfo->family])) { |
77 | if (unlikely(xfrm_input_afinfo[afinfo->is_ipip][afinfo->family] != afinfo)) | |
2f32b51b SK |
78 | err = -EINVAL; |
79 | else | |
1475ee0a | 80 | RCU_INIT_POINTER(xfrm_input_afinfo[afinfo->is_ipip][afinfo->family], NULL); |
2f32b51b SK |
81 | } |
82 | spin_unlock_bh(&xfrm_input_afinfo_lock); | |
83 | synchronize_rcu(); | |
84 | return err; | |
85 | } | |
86 | EXPORT_SYMBOL(xfrm_input_unregister_afinfo); | |
87 | ||
1475ee0a | 88 | static const struct xfrm_input_afinfo *xfrm_input_get_afinfo(u8 family, bool is_ipip) |
2f32b51b | 89 | { |
960fdfde | 90 | const struct xfrm_input_afinfo *afinfo; |
2f32b51b | 91 | |
1475ee0a | 92 | if (WARN_ON_ONCE(family > AF_INET6)) |
2f32b51b | 93 | return NULL; |
960fdfde | 94 | |
2f32b51b | 95 | rcu_read_lock(); |
1475ee0a | 96 | afinfo = rcu_dereference(xfrm_input_afinfo[is_ipip][family]); |
2f32b51b SK |
97 | if (unlikely(!afinfo)) |
98 | rcu_read_unlock(); | |
99 | return afinfo; | |
100 | } | |
101 | ||
2f32b51b SK |
102 | static int xfrm_rcv_cb(struct sk_buff *skb, unsigned int family, u8 protocol, |
103 | int err) | |
104 | { | |
1475ee0a XL |
105 | bool is_ipip = (protocol == IPPROTO_IPIP || protocol == IPPROTO_IPV6); |
106 | const struct xfrm_input_afinfo *afinfo; | |
2f32b51b | 107 | int ret; |
2f32b51b | 108 | |
1475ee0a | 109 | afinfo = xfrm_input_get_afinfo(family, is_ipip); |
2f32b51b SK |
110 | if (!afinfo) |
111 | return -EAFNOSUPPORT; | |
112 | ||
113 | ret = afinfo->callback(skb, protocol, err); | |
960fdfde | 114 | rcu_read_unlock(); |
2f32b51b SK |
115 | |
116 | return ret; | |
117 | } | |
118 | ||
4165079b | 119 | struct sec_path *secpath_set(struct sk_buff *skb) |
1da177e4 | 120 | { |
4165079b | 121 | struct sec_path *sp, *tmp = skb_ext_find(skb, SKB_EXT_SEC_PATH); |
1da177e4 | 122 | |
4165079b | 123 | sp = skb_ext_add(skb, SKB_EXT_SEC_PATH); |
1da177e4 LT |
124 | if (!sp) |
125 | return NULL; | |
126 | ||
4165079b FW |
127 | if (tmp) /* reused existing one (was COW'd if needed) */ |
128 | return sp; | |
54ef207a | 129 | |
4165079b | 130 | /* allocated new secpath */ |
f1193e91 | 131 | memset(sp->ovec, 0, sizeof(sp->ovec)); |
4165079b FW |
132 | sp->olen = 0; |
133 | sp->len = 0; | |
0ca64da1 FW |
134 | |
135 | return sp; | |
b0fcee82 SK |
136 | } |
137 | EXPORT_SYMBOL(secpath_set); | |
138 | ||
1da177e4 LT |
139 | /* Fetch spi and seq from ipsec header */ |
140 | ||
6067b2ba | 141 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq) |
1da177e4 LT |
142 | { |
143 | int offset, offset_seq; | |
44072500 | 144 | int hlen; |
1da177e4 LT |
145 | |
146 | switch (nexthdr) { | |
147 | case IPPROTO_AH: | |
44072500 | 148 | hlen = sizeof(struct ip_auth_hdr); |
1da177e4 LT |
149 | offset = offsetof(struct ip_auth_hdr, spi); |
150 | offset_seq = offsetof(struct ip_auth_hdr, seq_no); | |
151 | break; | |
152 | case IPPROTO_ESP: | |
44072500 | 153 | hlen = sizeof(struct ip_esp_hdr); |
1da177e4 LT |
154 | offset = offsetof(struct ip_esp_hdr, spi); |
155 | offset_seq = offsetof(struct ip_esp_hdr, seq_no); | |
156 | break; | |
157 | case IPPROTO_COMP: | |
158 | if (!pskb_may_pull(skb, sizeof(struct ip_comp_hdr))) | |
159 | return -EINVAL; | |
3e94c2dc | 160 | *spi = htonl(ntohs(*(__be16 *)(skb_transport_header(skb) + 2))); |
1da177e4 LT |
161 | *seq = 0; |
162 | return 0; | |
163 | default: | |
164 | return 1; | |
165 | } | |
166 | ||
44072500 | 167 | if (!pskb_may_pull(skb, hlen)) |
1da177e4 LT |
168 | return -EINVAL; |
169 | ||
3e94c2dc WC |
170 | *spi = *(__be32 *)(skb_transport_header(skb) + offset); |
171 | *seq = *(__be32 *)(skb_transport_header(skb) + offset_seq); | |
1da177e4 LT |
172 | return 0; |
173 | } | |
1e295370 | 174 | EXPORT_SYMBOL(xfrm_parse_spi); |
1da177e4 | 175 | |
b3284df1 FW |
176 | static int xfrm4_remove_beet_encap(struct xfrm_state *x, struct sk_buff *skb) |
177 | { | |
178 | struct iphdr *iph; | |
179 | int optlen = 0; | |
180 | int err = -EINVAL; | |
181 | ||
182 | if (unlikely(XFRM_MODE_SKB_CB(skb)->protocol == IPPROTO_BEETPH)) { | |
183 | struct ip_beet_phdr *ph; | |
184 | int phlen; | |
185 | ||
186 | if (!pskb_may_pull(skb, sizeof(*ph))) | |
187 | goto out; | |
188 | ||
189 | ph = (struct ip_beet_phdr *)skb->data; | |
190 | ||
191 | phlen = sizeof(*ph) + ph->padlen; | |
192 | optlen = ph->hdrlen * 8 + (IPV4_BEET_PHMAXLEN - phlen); | |
193 | if (optlen < 0 || optlen & 3 || optlen > 250) | |
194 | goto out; | |
195 | ||
196 | XFRM_MODE_SKB_CB(skb)->protocol = ph->nexthdr; | |
197 | ||
198 | if (!pskb_may_pull(skb, phlen)) | |
199 | goto out; | |
200 | __skb_pull(skb, phlen); | |
201 | } | |
202 | ||
203 | skb_push(skb, sizeof(*iph)); | |
204 | skb_reset_network_header(skb); | |
205 | skb_mac_header_rebuild(skb); | |
206 | ||
207 | xfrm4_beet_make_header(skb); | |
208 | ||
209 | iph = ip_hdr(skb); | |
210 | ||
211 | iph->ihl += optlen / 4; | |
212 | iph->tot_len = htons(skb->len); | |
213 | iph->daddr = x->sel.daddr.a4; | |
214 | iph->saddr = x->sel.saddr.a4; | |
215 | iph->check = 0; | |
216 | iph->check = ip_fast_csum(skb_network_header(skb), iph->ihl); | |
217 | err = 0; | |
218 | out: | |
219 | return err; | |
220 | } | |
221 | ||
222 | static void ipip_ecn_decapsulate(struct sk_buff *skb) | |
223 | { | |
224 | struct iphdr *inner_iph = ipip_hdr(skb); | |
225 | ||
226 | if (INET_ECN_is_ce(XFRM_MODE_SKB_CB(skb)->tos)) | |
227 | IP_ECN_set_ce(inner_iph); | |
228 | } | |
229 | ||
230 | static int xfrm4_remove_tunnel_encap(struct xfrm_state *x, struct sk_buff *skb) | |
231 | { | |
232 | int err = -EINVAL; | |
233 | ||
b3284df1 FW |
234 | if (!pskb_may_pull(skb, sizeof(struct iphdr))) |
235 | goto out; | |
236 | ||
237 | err = skb_unclone(skb, GFP_ATOMIC); | |
238 | if (err) | |
239 | goto out; | |
240 | ||
241 | if (x->props.flags & XFRM_STATE_DECAP_DSCP) | |
242 | ipv4_copy_dscp(XFRM_MODE_SKB_CB(skb)->tos, ipip_hdr(skb)); | |
243 | if (!(x->props.flags & XFRM_STATE_NOECN)) | |
244 | ipip_ecn_decapsulate(skb); | |
245 | ||
246 | skb_reset_network_header(skb); | |
247 | skb_mac_header_rebuild(skb); | |
248 | if (skb->mac_len) | |
249 | eth_hdr(skb)->h_proto = skb->protocol; | |
250 | ||
251 | err = 0; | |
252 | ||
253 | out: | |
254 | return err; | |
255 | } | |
256 | ||
257 | static void ipip6_ecn_decapsulate(struct sk_buff *skb) | |
258 | { | |
259 | struct ipv6hdr *inner_iph = ipipv6_hdr(skb); | |
260 | ||
261 | if (INET_ECN_is_ce(XFRM_MODE_SKB_CB(skb)->tos)) | |
262 | IP6_ECN_set_ce(skb, inner_iph); | |
263 | } | |
264 | ||
265 | static int xfrm6_remove_tunnel_encap(struct xfrm_state *x, struct sk_buff *skb) | |
266 | { | |
267 | int err = -EINVAL; | |
268 | ||
b3284df1 FW |
269 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) |
270 | goto out; | |
271 | ||
272 | err = skb_unclone(skb, GFP_ATOMIC); | |
273 | if (err) | |
274 | goto out; | |
275 | ||
276 | if (x->props.flags & XFRM_STATE_DECAP_DSCP) | |
6028da3f | 277 | ipv6_copy_dscp(XFRM_MODE_SKB_CB(skb)->tos, ipipv6_hdr(skb)); |
b3284df1 FW |
278 | if (!(x->props.flags & XFRM_STATE_NOECN)) |
279 | ipip6_ecn_decapsulate(skb); | |
280 | ||
281 | skb_reset_network_header(skb); | |
282 | skb_mac_header_rebuild(skb); | |
283 | if (skb->mac_len) | |
284 | eth_hdr(skb)->h_proto = skb->protocol; | |
285 | ||
286 | err = 0; | |
287 | ||
288 | out: | |
289 | return err; | |
290 | } | |
291 | ||
292 | static int xfrm6_remove_beet_encap(struct xfrm_state *x, struct sk_buff *skb) | |
293 | { | |
294 | struct ipv6hdr *ip6h; | |
295 | int size = sizeof(struct ipv6hdr); | |
296 | int err; | |
297 | ||
298 | err = skb_cow_head(skb, size + skb->mac_len); | |
299 | if (err) | |
300 | goto out; | |
301 | ||
302 | __skb_push(skb, size); | |
303 | skb_reset_network_header(skb); | |
304 | skb_mac_header_rebuild(skb); | |
305 | ||
306 | xfrm6_beet_make_header(skb); | |
307 | ||
308 | ip6h = ipv6_hdr(skb); | |
309 | ip6h->payload_len = htons(skb->len - size); | |
310 | ip6h->daddr = x->sel.daddr.in6; | |
311 | ip6h->saddr = x->sel.saddr.in6; | |
312 | err = 0; | |
313 | out: | |
314 | return err; | |
315 | } | |
316 | ||
317 | /* Remove encapsulation header. | |
318 | * | |
319 | * The IP header will be moved over the top of the encapsulation | |
320 | * header. | |
321 | * | |
322 | * On entry, the transport header shall point to where the IP header | |
323 | * should be and the network header shall be set to where the IP | |
324 | * header currently is. skb->data shall point to the start of the | |
325 | * payload. | |
326 | */ | |
327 | static int | |
328 | xfrm_inner_mode_encap_remove(struct xfrm_state *x, | |
b3284df1 FW |
329 | struct sk_buff *skb) |
330 | { | |
5f24f41e | 331 | switch (x->props.mode) { |
b3284df1 | 332 | case XFRM_MODE_BEET: |
5f24f41e HX |
333 | switch (XFRM_MODE_SKB_CB(skb)->protocol) { |
334 | case IPPROTO_IPIP: | |
335 | case IPPROTO_BEETPH: | |
b3284df1 | 336 | return xfrm4_remove_beet_encap(x, skb); |
5f24f41e | 337 | case IPPROTO_IPV6: |
b3284df1 | 338 | return xfrm6_remove_beet_encap(x, skb); |
5f24f41e | 339 | } |
b3284df1 FW |
340 | break; |
341 | case XFRM_MODE_TUNNEL: | |
5f24f41e HX |
342 | switch (XFRM_MODE_SKB_CB(skb)->protocol) { |
343 | case IPPROTO_IPIP: | |
b3284df1 | 344 | return xfrm4_remove_tunnel_encap(x, skb); |
5f24f41e | 345 | case IPPROTO_IPV6: |
b3284df1 FW |
346 | return xfrm6_remove_tunnel_encap(x, skb); |
347 | break; | |
5f24f41e | 348 | } |
b3284df1 FW |
349 | } |
350 | ||
351 | WARN_ON_ONCE(1); | |
352 | return -EOPNOTSUPP; | |
353 | } | |
354 | ||
c2d305e5 | 355 | static int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb) |
227620e2 | 356 | { |
5f24f41e | 357 | switch (x->props.family) { |
a269fbfc FW |
358 | case AF_INET: |
359 | xfrm4_extract_header(skb); | |
360 | break; | |
361 | case AF_INET6: | |
362 | xfrm6_extract_header(skb); | |
363 | break; | |
364 | default: | |
365 | WARN_ON_ONCE(1); | |
366 | return -EAFNOSUPPORT; | |
367 | } | |
227620e2 | 368 | |
5f24f41e HX |
369 | switch (XFRM_MODE_SKB_CB(skb)->protocol) { |
370 | case IPPROTO_IPIP: | |
371 | case IPPROTO_BEETPH: | |
4c203b04 FW |
372 | skb->protocol = htons(ETH_P_IP); |
373 | break; | |
5f24f41e | 374 | case IPPROTO_IPV6: |
4c203b04 | 375 | skb->protocol = htons(ETH_P_IPV6); |
1be451d9 | 376 | break; |
4c203b04 FW |
377 | default: |
378 | WARN_ON_ONCE(1); | |
379 | break; | |
733a5fac FW |
380 | } |
381 | ||
5f24f41e | 382 | return xfrm_inner_mode_encap_remove(x, skb); |
227620e2 | 383 | } |
c2d305e5 FW |
384 | |
385 | /* Remove encapsulation header. | |
386 | * | |
387 | * The IP header will be moved over the top of the encapsulation header. | |
388 | * | |
389 | * On entry, skb_transport_header() shall point to where the IP header | |
390 | * should be and skb_network_header() shall be set to where the IP header | |
391 | * currently is. skb->data shall point to the start of the payload. | |
392 | */ | |
393 | static int xfrm4_transport_input(struct xfrm_state *x, struct sk_buff *skb) | |
394 | { | |
c2d305e5 FW |
395 | int ihl = skb->data - skb_transport_header(skb); |
396 | ||
397 | if (skb->transport_header != skb->network_header) { | |
398 | memmove(skb_transport_header(skb), | |
399 | skb_network_header(skb), ihl); | |
400 | skb->network_header = skb->transport_header; | |
401 | } | |
402 | ip_hdr(skb)->tot_len = htons(skb->len + ihl); | |
403 | skb_reset_transport_header(skb); | |
404 | return 0; | |
c2d305e5 FW |
405 | } |
406 | ||
407 | static int xfrm6_transport_input(struct xfrm_state *x, struct sk_buff *skb) | |
408 | { | |
4c145dce | 409 | #if IS_ENABLED(CONFIG_IPV6) |
c2d305e5 FW |
410 | int ihl = skb->data - skb_transport_header(skb); |
411 | ||
412 | if (skb->transport_header != skb->network_header) { | |
413 | memmove(skb_transport_header(skb), | |
414 | skb_network_header(skb), ihl); | |
415 | skb->network_header = skb->transport_header; | |
416 | } | |
417 | ipv6_hdr(skb)->payload_len = htons(skb->len + ihl - | |
418 | sizeof(struct ipv6hdr)); | |
419 | skb_reset_transport_header(skb); | |
420 | return 0; | |
421 | #else | |
4c145dce FW |
422 | WARN_ON_ONCE(1); |
423 | return -EAFNOSUPPORT; | |
c2d305e5 FW |
424 | #endif |
425 | } | |
426 | ||
427 | static int xfrm_inner_mode_input(struct xfrm_state *x, | |
c2d305e5 FW |
428 | struct sk_buff *skb) |
429 | { | |
5f24f41e | 430 | switch (x->props.mode) { |
c2d305e5 FW |
431 | case XFRM_MODE_BEET: |
432 | case XFRM_MODE_TUNNEL: | |
433 | return xfrm_prepare_input(x, skb); | |
434 | case XFRM_MODE_TRANSPORT: | |
5f24f41e | 435 | if (x->props.family == AF_INET) |
c2d305e5 | 436 | return xfrm4_transport_input(x, skb); |
5f24f41e | 437 | if (x->props.family == AF_INET6) |
c2d305e5 FW |
438 | return xfrm6_transport_input(x, skb); |
439 | break; | |
440 | case XFRM_MODE_ROUTEOPTIMIZATION: | |
441 | WARN_ON_ONCE(1); | |
442 | break; | |
443 | default: | |
444 | WARN_ON_ONCE(1); | |
445 | break; | |
446 | } | |
447 | ||
448 | return -EOPNOTSUPP; | |
449 | } | |
227620e2 | 450 | |
716062fd HX |
451 | int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type) |
452 | { | |
733a5fac | 453 | const struct xfrm_state_afinfo *afinfo; |
bd235e3c | 454 | struct net *net = dev_net(skb->dev); |
716062fd HX |
455 | int err; |
456 | __be32 seq; | |
2cd08467 | 457 | __be32 seq_hi; |
3328715e | 458 | struct xfrm_state *x = NULL; |
1bf06cd2 | 459 | xfrm_address_t *daddr; |
049f8e2e | 460 | u32 mark = skb->mark; |
4ce3dbe3 | 461 | unsigned int family = AF_UNSPEC; |
716062fd | 462 | int decaps = 0; |
1bf06cd2 | 463 | int async = 0; |
7785bba2 | 464 | bool xfrm_gro = false; |
d77e38e6 SK |
465 | bool crypto_done = false; |
466 | struct xfrm_offload *xo = xfrm_offload(skb); | |
0ca64da1 | 467 | struct sec_path *sp; |
1bf06cd2 | 468 | |
1bf06cd2 | 469 | if (encap_type < 0) { |
00501121 | 470 | x = xfrm_input_state(skb); |
4ce3dbe3 AH |
471 | |
472 | if (unlikely(x->km.state != XFRM_STATE_VALID)) { | |
473 | if (x->km.state == XFRM_STATE_ACQ) | |
474 | XFRM_INC_STATS(net, LINUX_MIB_XFRMACQUIREERROR); | |
475 | else | |
476 | XFRM_INC_STATS(net, | |
477 | LINUX_MIB_XFRMINSTATEINVALID); | |
4944a4b1 XX |
478 | |
479 | if (encap_type == -1) | |
480 | dev_put(skb->dev); | |
4ce3dbe3 AH |
481 | goto drop; |
482 | } | |
483 | ||
5f24f41e | 484 | family = x->props.family; |
7785bba2 SK |
485 | |
486 | /* An encap_type of -1 indicates async resumption. */ | |
487 | if (encap_type == -1) { | |
488 | async = 1; | |
489 | seq = XFRM_SKB_CB(skb)->seq.input.low; | |
490 | goto resume; | |
491 | } | |
bcd1f8a4 | 492 | |
7785bba2 SK |
493 | /* encap_type < -1 indicates a GRO call. */ |
494 | encap_type = 0; | |
495 | seq = XFRM_SPI_SKB_CB(skb)->seq; | |
716062fd | 496 | |
bcd1f8a4 SK |
497 | if (xo && (xo->flags & CRYPTO_DONE)) { |
498 | crypto_done = true; | |
bcd1f8a4 SK |
499 | family = XFRM_SPI_SKB_CB(skb)->family; |
500 | ||
501 | if (!(xo->status & CRYPTO_SUCCESS)) { | |
502 | if (xo->status & | |
503 | (CRYPTO_TRANSPORT_AH_AUTH_FAILED | | |
504 | CRYPTO_TRANSPORT_ESP_AUTH_FAILED | | |
505 | CRYPTO_TUNNEL_AH_AUTH_FAILED | | |
506 | CRYPTO_TUNNEL_ESP_AUTH_FAILED)) { | |
507 | ||
508 | xfrm_audit_state_icvfail(x, skb, | |
509 | x->type->proto); | |
510 | x->stats.integrity_failed++; | |
511 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEPROTOERROR); | |
512 | goto drop; | |
513 | } | |
514 | ||
47ebcc0b YK |
515 | if (xo->status & CRYPTO_INVALID_PROTOCOL) { |
516 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEPROTOERROR); | |
517 | goto drop; | |
518 | } | |
519 | ||
bcd1f8a4 | 520 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINBUFFERERROR); |
d77e38e6 SK |
521 | goto drop; |
522 | } | |
523 | ||
ad57dae8 | 524 | if (xfrm_parse_spi(skb, nexthdr, &spi, &seq)) { |
bcd1f8a4 SK |
525 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINHDRERROR); |
526 | goto drop; | |
527 | } | |
d77e38e6 SK |
528 | } |
529 | ||
7785bba2 | 530 | goto lock; |
1bf06cd2 | 531 | } |
716062fd | 532 | |
3328715e SK |
533 | family = XFRM_SPI_SKB_CB(skb)->family; |
534 | ||
049f8e2e | 535 | /* if tunnel is present override skb->mark value with tunnel i_key */ |
1625f452 AK |
536 | switch (family) { |
537 | case AF_INET: | |
538 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) | |
049f8e2e | 539 | mark = be32_to_cpu(XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4->parms.i_key); |
1625f452 AK |
540 | break; |
541 | case AF_INET6: | |
542 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) | |
049f8e2e | 543 | mark = be32_to_cpu(XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6->parms.i_key); |
1625f452 | 544 | break; |
049f8e2e AD |
545 | } |
546 | ||
0ca64da1 FW |
547 | sp = secpath_set(skb); |
548 | if (!sp) { | |
b0fcee82 SK |
549 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINERROR); |
550 | goto drop; | |
b2aa5e9d HX |
551 | } |
552 | ||
716062fd | 553 | seq = 0; |
ad57dae8 | 554 | if (!spi && xfrm_parse_spi(skb, nexthdr, &spi, &seq)) { |
f203b76d | 555 | secpath_reset(skb); |
59c9940e | 556 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINHDRERROR); |
716062fd | 557 | goto drop; |
0aa64774 | 558 | } |
716062fd | 559 | |
cb79a180 FW |
560 | daddr = (xfrm_address_t *)(skb_network_header(skb) + |
561 | XFRM_SPI_SKB_CB(skb)->daddroff); | |
716062fd | 562 | do { |
2294be0f FW |
563 | sp = skb_sec_path(skb); |
564 | ||
565 | if (sp->len == XFRM_MAX_DEPTH) { | |
f203b76d | 566 | secpath_reset(skb); |
59c9940e | 567 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINBUFFERERROR); |
716062fd | 568 | goto drop; |
0aa64774 | 569 | } |
716062fd | 570 | |
049f8e2e | 571 | x = xfrm_state_lookup(net, mark, daddr, spi, nexthdr, family); |
0aa64774 | 572 | if (x == NULL) { |
f203b76d | 573 | secpath_reset(skb); |
59c9940e | 574 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINNOSTATES); |
afeb14b4 | 575 | xfrm_audit_state_notfound(skb, family, spi, seq); |
716062fd | 576 | goto drop; |
0aa64774 | 577 | } |
716062fd | 578 | |
9b42c1f1 SK |
579 | skb->mark = xfrm_smark_get(skb->mark, x); |
580 | ||
2294be0f | 581 | sp->xvec[sp->len++] = x; |
b2aa5e9d | 582 | |
0152eee6 SK |
583 | skb_dst_force(skb); |
584 | if (!skb_dst(skb)) { | |
585 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINERROR); | |
586 | goto drop; | |
587 | } | |
588 | ||
7785bba2 | 589 | lock: |
716062fd | 590 | spin_lock(&x->lock); |
4c4d41f2 | 591 | |
0aa64774 | 592 | if (unlikely(x->km.state != XFRM_STATE_VALID)) { |
dc0565ce LR |
593 | if (x->km.state == XFRM_STATE_ACQ) |
594 | XFRM_INC_STATS(net, LINUX_MIB_XFRMACQUIREERROR); | |
595 | else | |
596 | XFRM_INC_STATS(net, | |
597 | LINUX_MIB_XFRMINSTATEINVALID); | |
716062fd | 598 | goto drop_unlock; |
0aa64774 | 599 | } |
716062fd | 600 | |
3de77cf2 DM |
601 | if ((x->encap ? x->encap->encap_type : 0) != encap_type) { |
602 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEMISMATCH); | |
603 | goto drop_unlock; | |
604 | } | |
605 | ||
adfc2fdb | 606 | if (xfrm_replay_check(x, skb, seq)) { |
59c9940e | 607 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATESEQERROR); |
716062fd | 608 | goto drop_unlock; |
0aa64774 | 609 | } |
716062fd | 610 | |
0aa64774 | 611 | if (xfrm_state_check_expire(x)) { |
59c9940e | 612 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEEXPIRED); |
716062fd | 613 | goto drop_unlock; |
0aa64774 | 614 | } |
716062fd | 615 | |
0ebea8ef HX |
616 | spin_unlock(&x->lock); |
617 | ||
68c11e98 AD |
618 | if (xfrm_tunnel_check(skb, x, family)) { |
619 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEMODEERROR); | |
620 | goto drop; | |
621 | } | |
622 | ||
2cd08467 SK |
623 | seq_hi = htonl(xfrm_replay_seqhi(x, seq)); |
624 | ||
1ce3644a | 625 | XFRM_SKB_CB(skb)->seq.input.low = seq; |
2cd08467 | 626 | XFRM_SKB_CB(skb)->seq.input.hi = seq_hi; |
1bf06cd2 | 627 | |
071d36bf | 628 | dev_hold(skb->dev); |
3bc07321 | 629 | |
d77e38e6 SK |
630 | if (crypto_done) |
631 | nexthdr = x->type_offload->input_tail(x, skb); | |
632 | else | |
633 | nexthdr = x->type->input(x, skb); | |
0ebea8ef | 634 | |
1bf06cd2 HX |
635 | if (nexthdr == -EINPROGRESS) |
636 | return 0; | |
1bf06cd2 | 637 | resume: |
071d36bf | 638 | dev_put(skb->dev); |
639 | ||
0ebea8ef | 640 | spin_lock(&x->lock); |
afcaf61b | 641 | if (nexthdr < 0) { |
9dd3245a HX |
642 | if (nexthdr == -EBADMSG) { |
643 | xfrm_audit_state_icvfail(x, skb, | |
644 | x->type->proto); | |
668dc8af | 645 | x->stats.integrity_failed++; |
9dd3245a | 646 | } |
59c9940e | 647 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEPROTOERROR); |
716062fd | 648 | goto drop_unlock; |
668dc8af | 649 | } |
716062fd | 650 | |
716062fd HX |
651 | /* only the first xfrm gets the encap type */ |
652 | encap_type = 0; | |
653 | ||
25cfb8bc | 654 | if (xfrm_replay_recheck(x, skb, seq)) { |
bcf66bf5 SK |
655 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATESEQERROR); |
656 | goto drop_unlock; | |
657 | } | |
658 | ||
c7f87783 | 659 | xfrm_replay_advance(x, seq); |
716062fd HX |
660 | |
661 | x->curlft.bytes += skb->len; | |
662 | x->curlft.packets++; | |
f7fe25a6 | 663 | x->lastused = ktime_get_real_seconds(); |
716062fd HX |
664 | |
665 | spin_unlock(&x->lock); | |
666 | ||
60d5fcfb HX |
667 | XFRM_MODE_SKB_CB(skb)->protocol = nexthdr; |
668 | ||
5f24f41e | 669 | if (xfrm_inner_mode_input(x, skb)) { |
59c9940e | 670 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEMODEERROR); |
716062fd | 671 | goto drop; |
0aa64774 | 672 | } |
716062fd | 673 | |
c9500d7b | 674 | if (x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL) { |
716062fd HX |
675 | decaps = 1; |
676 | break; | |
677 | } | |
678 | ||
1bf06cd2 HX |
679 | /* |
680 | * We need the inner address. However, we only get here for | |
681 | * transport mode so the outer address is identical. | |
682 | */ | |
683 | daddr = &x->id.daddr; | |
5f24f41e | 684 | family = x->props.family; |
1bf06cd2 | 685 | |
716062fd | 686 | err = xfrm_parse_spi(skb, nexthdr, &spi, &seq); |
0aa64774 | 687 | if (err < 0) { |
59c9940e | 688 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINHDRERROR); |
716062fd | 689 | goto drop; |
0aa64774 | 690 | } |
782710e3 | 691 | crypto_done = false; |
716062fd HX |
692 | } while (!err); |
693 | ||
3328715e SK |
694 | err = xfrm_rcv_cb(skb, family, x->type->proto, 0); |
695 | if (err) | |
696 | goto drop; | |
697 | ||
895b5c9f | 698 | nf_reset_ct(skb); |
716062fd HX |
699 | |
700 | if (decaps) { | |
2294be0f FW |
701 | sp = skb_sec_path(skb); |
702 | if (sp) | |
703 | sp->olen = 0; | |
abc340b3 EB |
704 | if (skb_valid_dst(skb)) |
705 | skb_dst_drop(skb); | |
1995876a | 706 | gro_cells_receive(&gro_cells, skb); |
716062fd HX |
707 | return 0; |
708 | } else { | |
7785bba2 SK |
709 | xo = xfrm_offload(skb); |
710 | if (xo) | |
711 | xfrm_gro = xo->flags & XFRM_GRO; | |
712 | ||
733a5fac FW |
713 | err = -EAFNOSUPPORT; |
714 | rcu_read_lock(); | |
5f24f41e | 715 | afinfo = xfrm_state_afinfo_get_rcu(x->props.family); |
733a5fac FW |
716 | if (likely(afinfo)) |
717 | err = afinfo->transport_finish(skb, xfrm_gro || async); | |
718 | rcu_read_unlock(); | |
7785bba2 | 719 | if (xfrm_gro) { |
2294be0f FW |
720 | sp = skb_sec_path(skb); |
721 | if (sp) | |
722 | sp->olen = 0; | |
abc340b3 EB |
723 | if (skb_valid_dst(skb)) |
724 | skb_dst_drop(skb); | |
7785bba2 SK |
725 | gro_cells_receive(&gro_cells, skb); |
726 | return err; | |
727 | } | |
728 | ||
729 | return err; | |
716062fd HX |
730 | } |
731 | ||
732 | drop_unlock: | |
733 | spin_unlock(&x->lock); | |
716062fd | 734 | drop: |
3328715e | 735 | xfrm_rcv_cb(skb, family, x && x->type ? x->type->proto : nexthdr, -1); |
716062fd HX |
736 | kfree_skb(skb); |
737 | return 0; | |
738 | } | |
739 | EXPORT_SYMBOL(xfrm_input); | |
740 | ||
1bf06cd2 HX |
741 | int xfrm_input_resume(struct sk_buff *skb, int nexthdr) |
742 | { | |
743 | return xfrm_input(skb, nexthdr, 0, -1); | |
744 | } | |
745 | EXPORT_SYMBOL(xfrm_input_resume); | |
746 | ||
4f492066 | 747 | static void xfrm_trans_reinject(struct work_struct *work) |
acf568ee | 748 | { |
4f492066 | 749 | struct xfrm_trans_tasklet *trans = container_of(work, struct xfrm_trans_tasklet, work); |
acf568ee HX |
750 | struct sk_buff_head queue; |
751 | struct sk_buff *skb; | |
752 | ||
753 | __skb_queue_head_init(&queue); | |
4f492066 | 754 | spin_lock_bh(&trans->queue_lock); |
acf568ee | 755 | skb_queue_splice_init(&trans->queue, &queue); |
4f492066 | 756 | spin_unlock_bh(&trans->queue_lock); |
acf568ee | 757 | |
4f492066 | 758 | local_bh_disable(); |
acf568ee | 759 | while ((skb = __skb_dequeue(&queue))) |
7b380192 SD |
760 | XFRM_TRANS_SKB_CB(skb)->finish(XFRM_TRANS_SKB_CB(skb)->net, |
761 | NULL, skb); | |
4f492066 | 762 | local_bh_enable(); |
acf568ee HX |
763 | } |
764 | ||
7b380192 SD |
765 | int xfrm_trans_queue_net(struct net *net, struct sk_buff *skb, |
766 | int (*finish)(struct net *, struct sock *, | |
767 | struct sk_buff *)) | |
acf568ee HX |
768 | { |
769 | struct xfrm_trans_tasklet *trans; | |
770 | ||
771 | trans = this_cpu_ptr(&xfrm_trans_tasklet); | |
772 | ||
5dcd08cd | 773 | if (skb_queue_len(&trans->queue) >= READ_ONCE(netdev_max_backlog)) |
acf568ee HX |
774 | return -ENOBUFS; |
775 | ||
7b380192 SD |
776 | BUILD_BUG_ON(sizeof(struct xfrm_trans_cb) > sizeof(skb->cb)); |
777 | ||
acf568ee | 778 | XFRM_TRANS_SKB_CB(skb)->finish = finish; |
7b380192 | 779 | XFRM_TRANS_SKB_CB(skb)->net = net; |
4f492066 | 780 | spin_lock_bh(&trans->queue_lock); |
d16b46e4 | 781 | __skb_queue_tail(&trans->queue, skb); |
4f492066 LJ |
782 | spin_unlock_bh(&trans->queue_lock); |
783 | schedule_work(&trans->work); | |
acf568ee HX |
784 | return 0; |
785 | } | |
7b380192 SD |
786 | EXPORT_SYMBOL(xfrm_trans_queue_net); |
787 | ||
788 | int xfrm_trans_queue(struct sk_buff *skb, | |
789 | int (*finish)(struct net *, struct sock *, | |
790 | struct sk_buff *)) | |
791 | { | |
792 | return xfrm_trans_queue_net(dev_net(skb->dev), skb, finish); | |
793 | } | |
acf568ee HX |
794 | EXPORT_SYMBOL(xfrm_trans_queue); |
795 | ||
1da177e4 LT |
796 | void __init xfrm_input_init(void) |
797 | { | |
1995876a | 798 | int err; |
acf568ee | 799 | int i; |
1995876a SK |
800 | |
801 | init_dummy_netdev(&xfrm_napi_dev); | |
802 | err = gro_cells_init(&gro_cells, &xfrm_napi_dev); | |
803 | if (err) | |
804 | gro_cells.cells = NULL; | |
805 | ||
acf568ee HX |
806 | for_each_possible_cpu(i) { |
807 | struct xfrm_trans_tasklet *trans; | |
808 | ||
809 | trans = &per_cpu(xfrm_trans_tasklet, i); | |
4f492066 | 810 | spin_lock_init(&trans->queue_lock); |
acf568ee | 811 | __skb_queue_head_init(&trans->queue); |
4f492066 | 812 | INIT_WORK(&trans->work, xfrm_trans_reinject); |
acf568ee | 813 | } |
1da177e4 | 814 | } |