Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
6c8702c6 DL |
2 | /* |
3 | * SR-IPv6 implementation | |
4 | * | |
5 | * Author: | |
6 | * David Lebrun <david.lebrun@uclouvain.be> | |
6c8702c6 DL |
7 | */ |
8 | ||
9 | #include <linux/types.h> | |
10 | #include <linux/skbuff.h> | |
11 | #include <linux/net.h> | |
12 | #include <linux/module.h> | |
13 | #include <net/ip.h> | |
5807b22c | 14 | #include <net/ip_tunnels.h> |
6c8702c6 DL |
15 | #include <net/lwtunnel.h> |
16 | #include <net/netevent.h> | |
17 | #include <net/netns/generic.h> | |
18 | #include <net/ip6_fib.h> | |
19 | #include <net/route.h> | |
20 | #include <net/seg6.h> | |
21 | #include <linux/seg6.h> | |
22 | #include <linux/seg6_iptunnel.h> | |
23 | #include <net/addrconf.h> | |
24 | #include <net/ip6_route.h> | |
6c8702c6 | 25 | #include <net/dst_cache.h> |
9baee834 DL |
26 | #ifdef CONFIG_IPV6_SEG6_HMAC |
27 | #include <net/seg6_hmac.h> | |
28 | #endif | |
6c8702c6 DL |
29 | |
30 | struct seg6_lwt { | |
6c8702c6 | 31 | struct dst_cache cache; |
6c8702c6 DL |
32 | struct seg6_iptunnel_encap tuninfo[0]; |
33 | }; | |
34 | ||
35 | static inline struct seg6_lwt *seg6_lwt_lwtunnel(struct lwtunnel_state *lwt) | |
36 | { | |
37 | return (struct seg6_lwt *)lwt->data; | |
38 | } | |
39 | ||
40 | static inline struct seg6_iptunnel_encap * | |
41 | seg6_encap_lwtunnel(struct lwtunnel_state *lwt) | |
42 | { | |
43 | return seg6_lwt_lwtunnel(lwt)->tuninfo; | |
44 | } | |
45 | ||
46 | static const struct nla_policy seg6_iptunnel_policy[SEG6_IPTUNNEL_MAX + 1] = { | |
47 | [SEG6_IPTUNNEL_SRH] = { .type = NLA_BINARY }, | |
48 | }; | |
49 | ||
bb4005ba WY |
50 | static int nla_put_srh(struct sk_buff *skb, int attrtype, |
51 | struct seg6_iptunnel_encap *tuninfo) | |
6c8702c6 DL |
52 | { |
53 | struct seg6_iptunnel_encap *data; | |
54 | struct nlattr *nla; | |
55 | int len; | |
56 | ||
57 | len = SEG6_IPTUN_ENCAP_SIZE(tuninfo); | |
58 | ||
59 | nla = nla_reserve(skb, attrtype, len); | |
60 | if (!nla) | |
61 | return -EMSGSIZE; | |
62 | ||
63 | data = nla_data(nla); | |
64 | memcpy(data, tuninfo, len); | |
65 | ||
66 | return 0; | |
67 | } | |
68 | ||
69 | static void set_tun_src(struct net *net, struct net_device *dev, | |
70 | struct in6_addr *daddr, struct in6_addr *saddr) | |
71 | { | |
72 | struct seg6_pernet_data *sdata = seg6_pernet(net); | |
73 | struct in6_addr *tun_src; | |
74 | ||
75 | rcu_read_lock(); | |
76 | ||
77 | tun_src = rcu_dereference(sdata->tun_src); | |
78 | ||
79 | if (!ipv6_addr_any(tun_src)) { | |
80 | memcpy(saddr, tun_src, sizeof(struct in6_addr)); | |
81 | } else { | |
82 | ipv6_dev_get_saddr(net, dev, daddr, IPV6_PREFER_SRC_PUBLIC, | |
83 | saddr); | |
84 | } | |
85 | ||
86 | rcu_read_unlock(); | |
87 | } | |
88 | ||
b5facfdb AA |
89 | /* Compute flowlabel for outer IPv6 header */ |
90 | static __be32 seg6_make_flowlabel(struct net *net, struct sk_buff *skb, | |
91 | struct ipv6hdr *inner_hdr) | |
92 | { | |
93 | int do_flowlabel = net->ipv6.sysctl.seg6_flowlabel; | |
94 | __be32 flowlabel = 0; | |
95 | u32 hash; | |
96 | ||
97 | if (do_flowlabel > 0) { | |
98 | hash = skb_get_hash(skb); | |
3ee593ad | 99 | hash = rol32(hash, 16); |
b5facfdb AA |
100 | flowlabel = (__force __be32)hash & IPV6_FLOWLABEL_MASK; |
101 | } else if (!do_flowlabel && skb->protocol == htons(ETH_P_IPV6)) { | |
102 | flowlabel = ip6_flowlabel(inner_hdr); | |
103 | } | |
104 | return flowlabel; | |
105 | } | |
106 | ||
6c8702c6 | 107 | /* encapsulate an IPv6 packet within an outer IPv6 header with a given SRH */ |
32d99d0b | 108 | int seg6_do_srh_encap(struct sk_buff *skb, struct ipv6_sr_hdr *osrh, int proto) |
6c8702c6 | 109 | { |
8936ef76 DL |
110 | struct dst_entry *dst = skb_dst(skb); |
111 | struct net *net = dev_net(dst->dev); | |
6c8702c6 DL |
112 | struct ipv6hdr *hdr, *inner_hdr; |
113 | struct ipv6_sr_hdr *isrh; | |
114 | int hdrlen, tot_len, err; | |
b5facfdb | 115 | __be32 flowlabel; |
6c8702c6 DL |
116 | |
117 | hdrlen = (osrh->hdrlen + 1) << 3; | |
118 | tot_len = hdrlen + sizeof(*hdr); | |
119 | ||
bbb40a0b | 120 | err = skb_cow_head(skb, tot_len + skb->mac_len); |
6c8702c6 DL |
121 | if (unlikely(err)) |
122 | return err; | |
123 | ||
124 | inner_hdr = ipv6_hdr(skb); | |
6df93462 | 125 | flowlabel = seg6_make_flowlabel(net, skb, inner_hdr); |
6c8702c6 DL |
126 | |
127 | skb_push(skb, tot_len); | |
128 | skb_reset_network_header(skb); | |
129 | skb_mac_header_rebuild(skb); | |
130 | hdr = ipv6_hdr(skb); | |
131 | ||
132 | /* inherit tc, flowlabel and hlim | |
133 | * hlim will be decremented in ip6_forward() afterwards and | |
134 | * decapsulation will overwrite inner hlim with outer hlim | |
135 | */ | |
32d99d0b DL |
136 | |
137 | if (skb->protocol == htons(ETH_P_IPV6)) { | |
138 | ip6_flow_hdr(hdr, ip6_tclass(ip6_flowinfo(inner_hdr)), | |
b5facfdb | 139 | flowlabel); |
32d99d0b DL |
140 | hdr->hop_limit = inner_hdr->hop_limit; |
141 | } else { | |
b5facfdb | 142 | ip6_flow_hdr(hdr, 0, flowlabel); |
32d99d0b | 143 | hdr->hop_limit = ip6_dst_hoplimit(skb_dst(skb)); |
ef489749 YK |
144 | |
145 | memset(IP6CB(skb), 0, sizeof(*IP6CB(skb))); | |
32d99d0b DL |
146 | } |
147 | ||
6c8702c6 DL |
148 | hdr->nexthdr = NEXTHDR_ROUTING; |
149 | ||
150 | isrh = (void *)hdr + sizeof(*hdr); | |
151 | memcpy(isrh, osrh, hdrlen); | |
152 | ||
32d99d0b | 153 | isrh->nexthdr = proto; |
6c8702c6 DL |
154 | |
155 | hdr->daddr = isrh->segments[isrh->first_segment]; | |
a957fa19 | 156 | set_tun_src(net, dst->dev, &hdr->daddr, &hdr->saddr); |
6c8702c6 | 157 | |
9baee834 DL |
158 | #ifdef CONFIG_IPV6_SEG6_HMAC |
159 | if (sr_has_hmac(isrh)) { | |
160 | err = seg6_push_hmac(net, &hdr->saddr, isrh); | |
161 | if (unlikely(err)) | |
162 | return err; | |
163 | } | |
164 | #endif | |
165 | ||
6c8702c6 DL |
166 | skb_postpush_rcsum(skb, hdr, tot_len); |
167 | ||
168 | return 0; | |
169 | } | |
b04c80d3 | 170 | EXPORT_SYMBOL_GPL(seg6_do_srh_encap); |
6c8702c6 DL |
171 | |
172 | /* insert an SRH within an IPv6 packet, just after the IPv6 header */ | |
b04c80d3 | 173 | int seg6_do_srh_inline(struct sk_buff *skb, struct ipv6_sr_hdr *osrh) |
6c8702c6 DL |
174 | { |
175 | struct ipv6hdr *hdr, *oldhdr; | |
176 | struct ipv6_sr_hdr *isrh; | |
177 | int hdrlen, err; | |
178 | ||
179 | hdrlen = (osrh->hdrlen + 1) << 3; | |
180 | ||
bbb40a0b | 181 | err = skb_cow_head(skb, hdrlen + skb->mac_len); |
6c8702c6 DL |
182 | if (unlikely(err)) |
183 | return err; | |
184 | ||
185 | oldhdr = ipv6_hdr(skb); | |
186 | ||
187 | skb_pull(skb, sizeof(struct ipv6hdr)); | |
188 | skb_postpull_rcsum(skb, skb_network_header(skb), | |
189 | sizeof(struct ipv6hdr)); | |
190 | ||
191 | skb_push(skb, sizeof(struct ipv6hdr) + hdrlen); | |
192 | skb_reset_network_header(skb); | |
193 | skb_mac_header_rebuild(skb); | |
194 | ||
195 | hdr = ipv6_hdr(skb); | |
196 | ||
197 | memmove(hdr, oldhdr, sizeof(*hdr)); | |
198 | ||
199 | isrh = (void *)hdr + sizeof(*hdr); | |
200 | memcpy(isrh, osrh, hdrlen); | |
201 | ||
202 | isrh->nexthdr = hdr->nexthdr; | |
203 | hdr->nexthdr = NEXTHDR_ROUTING; | |
204 | ||
205 | isrh->segments[0] = hdr->daddr; | |
206 | hdr->daddr = isrh->segments[isrh->first_segment]; | |
207 | ||
9baee834 DL |
208 | #ifdef CONFIG_IPV6_SEG6_HMAC |
209 | if (sr_has_hmac(isrh)) { | |
210 | struct net *net = dev_net(skb_dst(skb)->dev); | |
211 | ||
212 | err = seg6_push_hmac(net, &hdr->saddr, isrh); | |
213 | if (unlikely(err)) | |
214 | return err; | |
215 | } | |
216 | #endif | |
217 | ||
6c8702c6 DL |
218 | skb_postpush_rcsum(skb, hdr, sizeof(struct ipv6hdr) + hdrlen); |
219 | ||
220 | return 0; | |
221 | } | |
b04c80d3 | 222 | EXPORT_SYMBOL_GPL(seg6_do_srh_inline); |
6c8702c6 DL |
223 | |
224 | static int seg6_do_srh(struct sk_buff *skb) | |
225 | { | |
226 | struct dst_entry *dst = skb_dst(skb); | |
227 | struct seg6_iptunnel_encap *tinfo; | |
32d99d0b | 228 | int proto, err = 0; |
6c8702c6 DL |
229 | |
230 | tinfo = seg6_encap_lwtunnel(dst->lwtstate); | |
231 | ||
6c8702c6 | 232 | switch (tinfo->mode) { |
6c8702c6 | 233 | case SEG6_IPTUN_MODE_INLINE: |
32d99d0b DL |
234 | if (skb->protocol != htons(ETH_P_IPV6)) |
235 | return -EINVAL; | |
236 | ||
6c8702c6 | 237 | err = seg6_do_srh_inline(skb, tinfo->srh); |
32d99d0b DL |
238 | if (err) |
239 | return err; | |
6c8702c6 | 240 | break; |
6c8702c6 | 241 | case SEG6_IPTUN_MODE_ENCAP: |
5807b22c DL |
242 | err = iptunnel_handle_offloads(skb, SKB_GSO_IPXIP6); |
243 | if (err) | |
244 | return err; | |
245 | ||
32d99d0b DL |
246 | if (skb->protocol == htons(ETH_P_IPV6)) |
247 | proto = IPPROTO_IPV6; | |
248 | else if (skb->protocol == htons(ETH_P_IP)) | |
249 | proto = IPPROTO_IPIP; | |
250 | else | |
251 | return -EINVAL; | |
252 | ||
253 | err = seg6_do_srh_encap(skb, tinfo->srh, proto); | |
254 | if (err) | |
255 | return err; | |
256 | ||
5807b22c DL |
257 | skb_set_inner_transport_header(skb, skb_transport_offset(skb)); |
258 | skb_set_inner_protocol(skb, skb->protocol); | |
38ee7f2d DL |
259 | skb->protocol = htons(ETH_P_IPV6); |
260 | break; | |
261 | case SEG6_IPTUN_MODE_L2ENCAP: | |
262 | if (!skb_mac_header_was_set(skb)) | |
263 | return -EINVAL; | |
264 | ||
265 | if (pskb_expand_head(skb, skb->mac_len, 0, GFP_ATOMIC) < 0) | |
266 | return -ENOMEM; | |
267 | ||
268 | skb_mac_header_rebuild(skb); | |
269 | skb_push(skb, skb->mac_len); | |
270 | ||
271 | err = seg6_do_srh_encap(skb, tinfo->srh, NEXTHDR_NONE); | |
272 | if (err) | |
273 | return err; | |
274 | ||
32d99d0b | 275 | skb->protocol = htons(ETH_P_IPV6); |
6c8702c6 DL |
276 | break; |
277 | } | |
278 | ||
6c8702c6 DL |
279 | ipv6_hdr(skb)->payload_len = htons(skb->len - sizeof(struct ipv6hdr)); |
280 | skb_set_transport_header(skb, sizeof(struct ipv6hdr)); | |
281 | ||
6c8702c6 DL |
282 | return 0; |
283 | } | |
284 | ||
bb4005ba | 285 | static int seg6_input(struct sk_buff *skb) |
6c8702c6 | 286 | { |
af4a2209 DL |
287 | struct dst_entry *orig_dst = skb_dst(skb); |
288 | struct dst_entry *dst = NULL; | |
289 | struct seg6_lwt *slwt; | |
6c8702c6 DL |
290 | int err; |
291 | ||
292 | err = seg6_do_srh(skb); | |
293 | if (unlikely(err)) { | |
294 | kfree_skb(skb); | |
295 | return err; | |
296 | } | |
297 | ||
af4a2209 DL |
298 | slwt = seg6_lwt_lwtunnel(orig_dst->lwtstate); |
299 | ||
af4a2209 DL |
300 | preempt_disable(); |
301 | dst = dst_cache_get(&slwt->cache); | |
302 | preempt_enable(); | |
af4a2209 | 303 | |
6c8702c6 | 304 | skb_dst_drop(skb); |
af4a2209 DL |
305 | |
306 | if (!dst) { | |
307 | ip6_route_input(skb); | |
af4a2209 DL |
308 | dst = skb_dst(skb); |
309 | if (!dst->error) { | |
310 | preempt_disable(); | |
311 | dst_cache_set_ip6(&slwt->cache, dst, | |
312 | &ipv6_hdr(skb)->saddr); | |
313 | preempt_enable(); | |
314 | } | |
af4a2209 DL |
315 | } else { |
316 | skb_dst_set(skb, dst); | |
317 | } | |
6c8702c6 | 318 | |
af3b5158 DL |
319 | err = skb_cow_head(skb, LL_RESERVED_SPACE(dst->dev)); |
320 | if (unlikely(err)) | |
321 | return err; | |
322 | ||
6c8702c6 DL |
323 | return dst_input(skb); |
324 | } | |
325 | ||
bb4005ba | 326 | static int seg6_output(struct net *net, struct sock *sk, struct sk_buff *skb) |
6c8702c6 DL |
327 | { |
328 | struct dst_entry *orig_dst = skb_dst(skb); | |
329 | struct dst_entry *dst = NULL; | |
330 | struct seg6_lwt *slwt; | |
331 | int err = -EINVAL; | |
332 | ||
333 | err = seg6_do_srh(skb); | |
334 | if (unlikely(err)) | |
335 | goto drop; | |
336 | ||
337 | slwt = seg6_lwt_lwtunnel(orig_dst->lwtstate); | |
338 | ||
fa79581e | 339 | preempt_disable(); |
6c8702c6 | 340 | dst = dst_cache_get(&slwt->cache); |
fa79581e | 341 | preempt_enable(); |
6c8702c6 DL |
342 | |
343 | if (unlikely(!dst)) { | |
344 | struct ipv6hdr *hdr = ipv6_hdr(skb); | |
345 | struct flowi6 fl6; | |
346 | ||
1b4e5ad5 | 347 | memset(&fl6, 0, sizeof(fl6)); |
6c8702c6 DL |
348 | fl6.daddr = hdr->daddr; |
349 | fl6.saddr = hdr->saddr; | |
350 | fl6.flowlabel = ip6_flowinfo(hdr); | |
351 | fl6.flowi6_mark = skb->mark; | |
352 | fl6.flowi6_proto = hdr->nexthdr; | |
353 | ||
354 | dst = ip6_route_output(net, NULL, &fl6); | |
355 | if (dst->error) { | |
356 | err = dst->error; | |
357 | dst_release(dst); | |
358 | goto drop; | |
359 | } | |
360 | ||
fa79581e | 361 | preempt_disable(); |
6c8702c6 | 362 | dst_cache_set_ip6(&slwt->cache, dst, &fl6.saddr); |
fa79581e | 363 | preempt_enable(); |
6c8702c6 DL |
364 | } |
365 | ||
366 | skb_dst_drop(skb); | |
367 | skb_dst_set(skb, dst); | |
368 | ||
af3b5158 DL |
369 | err = skb_cow_head(skb, LL_RESERVED_SPACE(dst->dev)); |
370 | if (unlikely(err)) | |
371 | goto drop; | |
372 | ||
6c8702c6 DL |
373 | return dst_output(net, sk, skb); |
374 | drop: | |
375 | kfree_skb(skb); | |
376 | return err; | |
377 | } | |
378 | ||
30357d7d | 379 | static int seg6_build_state(struct nlattr *nla, |
6c8702c6 | 380 | unsigned int family, const void *cfg, |
9ae28727 DA |
381 | struct lwtunnel_state **ts, |
382 | struct netlink_ext_ack *extack) | |
6c8702c6 DL |
383 | { |
384 | struct nlattr *tb[SEG6_IPTUNNEL_MAX + 1]; | |
385 | struct seg6_iptunnel_encap *tuninfo; | |
386 | struct lwtunnel_state *newts; | |
387 | int tuninfo_len, min_size; | |
388 | struct seg6_lwt *slwt; | |
389 | int err; | |
390 | ||
32d99d0b DL |
391 | if (family != AF_INET && family != AF_INET6) |
392 | return -EINVAL; | |
393 | ||
8cb08174 JB |
394 | err = nla_parse_nested_deprecated(tb, SEG6_IPTUNNEL_MAX, nla, |
395 | seg6_iptunnel_policy, extack); | |
6c8702c6 DL |
396 | |
397 | if (err < 0) | |
398 | return err; | |
399 | ||
400 | if (!tb[SEG6_IPTUNNEL_SRH]) | |
401 | return -EINVAL; | |
402 | ||
403 | tuninfo = nla_data(tb[SEG6_IPTUNNEL_SRH]); | |
404 | tuninfo_len = nla_len(tb[SEG6_IPTUNNEL_SRH]); | |
405 | ||
406 | /* tuninfo must contain at least the iptunnel encap structure, | |
407 | * the SRH and one segment | |
408 | */ | |
409 | min_size = sizeof(*tuninfo) + sizeof(struct ipv6_sr_hdr) + | |
410 | sizeof(struct in6_addr); | |
411 | if (tuninfo_len < min_size) | |
412 | return -EINVAL; | |
413 | ||
414 | switch (tuninfo->mode) { | |
6c8702c6 | 415 | case SEG6_IPTUN_MODE_INLINE: |
32d99d0b DL |
416 | if (family != AF_INET6) |
417 | return -EINVAL; | |
418 | ||
6c8702c6 | 419 | break; |
6c8702c6 DL |
420 | case SEG6_IPTUN_MODE_ENCAP: |
421 | break; | |
38ee7f2d DL |
422 | case SEG6_IPTUN_MODE_L2ENCAP: |
423 | break; | |
6c8702c6 DL |
424 | default: |
425 | return -EINVAL; | |
426 | } | |
427 | ||
428 | /* verify that SRH is consistent */ | |
429 | if (!seg6_validate_srh(tuninfo->srh, tuninfo_len - sizeof(*tuninfo))) | |
430 | return -EINVAL; | |
431 | ||
432 | newts = lwtunnel_state_alloc(tuninfo_len + sizeof(*slwt)); | |
433 | if (!newts) | |
434 | return -ENOMEM; | |
435 | ||
436 | slwt = seg6_lwt_lwtunnel(newts); | |
437 | ||
191f86ca | 438 | err = dst_cache_init(&slwt->cache, GFP_ATOMIC); |
6c8702c6 DL |
439 | if (err) { |
440 | kfree(newts); | |
441 | return err; | |
442 | } | |
6c8702c6 DL |
443 | |
444 | memcpy(&slwt->tuninfo, tuninfo, tuninfo_len); | |
445 | ||
446 | newts->type = LWTUNNEL_ENCAP_SEG6; | |
38ee7f2d DL |
447 | newts->flags |= LWTUNNEL_STATE_INPUT_REDIRECT; |
448 | ||
449 | if (tuninfo->mode != SEG6_IPTUN_MODE_L2ENCAP) | |
450 | newts->flags |= LWTUNNEL_STATE_OUTPUT_REDIRECT; | |
451 | ||
6c8702c6 DL |
452 | newts->headroom = seg6_lwt_headroom(tuninfo); |
453 | ||
454 | *ts = newts; | |
455 | ||
456 | return 0; | |
457 | } | |
458 | ||
6c8702c6 DL |
459 | static void seg6_destroy_state(struct lwtunnel_state *lwt) |
460 | { | |
461 | dst_cache_destroy(&seg6_lwt_lwtunnel(lwt)->cache); | |
462 | } | |
6c8702c6 DL |
463 | |
464 | static int seg6_fill_encap_info(struct sk_buff *skb, | |
465 | struct lwtunnel_state *lwtstate) | |
466 | { | |
467 | struct seg6_iptunnel_encap *tuninfo = seg6_encap_lwtunnel(lwtstate); | |
468 | ||
469 | if (nla_put_srh(skb, SEG6_IPTUNNEL_SRH, tuninfo)) | |
470 | return -EMSGSIZE; | |
471 | ||
472 | return 0; | |
473 | } | |
474 | ||
475 | static int seg6_encap_nlsize(struct lwtunnel_state *lwtstate) | |
476 | { | |
477 | struct seg6_iptunnel_encap *tuninfo = seg6_encap_lwtunnel(lwtstate); | |
478 | ||
479 | return nla_total_size(SEG6_IPTUN_ENCAP_SIZE(tuninfo)); | |
480 | } | |
481 | ||
482 | static int seg6_encap_cmp(struct lwtunnel_state *a, struct lwtunnel_state *b) | |
483 | { | |
484 | struct seg6_iptunnel_encap *a_hdr = seg6_encap_lwtunnel(a); | |
485 | struct seg6_iptunnel_encap *b_hdr = seg6_encap_lwtunnel(b); | |
486 | int len = SEG6_IPTUN_ENCAP_SIZE(a_hdr); | |
487 | ||
488 | if (len != SEG6_IPTUN_ENCAP_SIZE(b_hdr)) | |
489 | return 1; | |
490 | ||
491 | return memcmp(a_hdr, b_hdr, len); | |
492 | } | |
493 | ||
494 | static const struct lwtunnel_encap_ops seg6_iptun_ops = { | |
495 | .build_state = seg6_build_state, | |
6c8702c6 | 496 | .destroy_state = seg6_destroy_state, |
6c8702c6 DL |
497 | .output = seg6_output, |
498 | .input = seg6_input, | |
499 | .fill_encap = seg6_fill_encap_info, | |
500 | .get_encap_size = seg6_encap_nlsize, | |
501 | .cmp_encap = seg6_encap_cmp, | |
88ff7334 | 502 | .owner = THIS_MODULE, |
6c8702c6 DL |
503 | }; |
504 | ||
505 | int __init seg6_iptunnel_init(void) | |
506 | { | |
507 | return lwtunnel_encap_add_ops(&seg6_iptun_ops, LWTUNNEL_ENCAP_SEG6); | |
508 | } | |
509 | ||
510 | void seg6_iptunnel_exit(void) | |
511 | { | |
512 | lwtunnel_encap_del_ops(&seg6_iptun_ops, LWTUNNEL_ENCAP_SEG6); | |
513 | } |