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Commit | Line | Data |
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6c8702c6 DL |
1 | /* |
2 | * SR-IPv6 implementation | |
3 | * | |
4 | * Author: | |
5 | * David Lebrun <david.lebrun@uclouvain.be> | |
6 | * | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/types.h> | |
15 | #include <linux/skbuff.h> | |
16 | #include <linux/net.h> | |
17 | #include <linux/module.h> | |
18 | #include <net/ip.h> | |
5807b22c | 19 | #include <net/ip_tunnels.h> |
6c8702c6 DL |
20 | #include <net/lwtunnel.h> |
21 | #include <net/netevent.h> | |
22 | #include <net/netns/generic.h> | |
23 | #include <net/ip6_fib.h> | |
24 | #include <net/route.h> | |
25 | #include <net/seg6.h> | |
26 | #include <linux/seg6.h> | |
27 | #include <linux/seg6_iptunnel.h> | |
28 | #include <net/addrconf.h> | |
29 | #include <net/ip6_route.h> | |
6c8702c6 | 30 | #include <net/dst_cache.h> |
9baee834 DL |
31 | #ifdef CONFIG_IPV6_SEG6_HMAC |
32 | #include <net/seg6_hmac.h> | |
33 | #endif | |
6c8702c6 DL |
34 | |
35 | struct seg6_lwt { | |
6c8702c6 | 36 | struct dst_cache cache; |
6c8702c6 DL |
37 | struct seg6_iptunnel_encap tuninfo[0]; |
38 | }; | |
39 | ||
40 | static inline struct seg6_lwt *seg6_lwt_lwtunnel(struct lwtunnel_state *lwt) | |
41 | { | |
42 | return (struct seg6_lwt *)lwt->data; | |
43 | } | |
44 | ||
45 | static inline struct seg6_iptunnel_encap * | |
46 | seg6_encap_lwtunnel(struct lwtunnel_state *lwt) | |
47 | { | |
48 | return seg6_lwt_lwtunnel(lwt)->tuninfo; | |
49 | } | |
50 | ||
51 | static const struct nla_policy seg6_iptunnel_policy[SEG6_IPTUNNEL_MAX + 1] = { | |
52 | [SEG6_IPTUNNEL_SRH] = { .type = NLA_BINARY }, | |
53 | }; | |
54 | ||
bb4005ba WY |
55 | static int nla_put_srh(struct sk_buff *skb, int attrtype, |
56 | struct seg6_iptunnel_encap *tuninfo) | |
6c8702c6 DL |
57 | { |
58 | struct seg6_iptunnel_encap *data; | |
59 | struct nlattr *nla; | |
60 | int len; | |
61 | ||
62 | len = SEG6_IPTUN_ENCAP_SIZE(tuninfo); | |
63 | ||
64 | nla = nla_reserve(skb, attrtype, len); | |
65 | if (!nla) | |
66 | return -EMSGSIZE; | |
67 | ||
68 | data = nla_data(nla); | |
69 | memcpy(data, tuninfo, len); | |
70 | ||
71 | return 0; | |
72 | } | |
73 | ||
74 | static void set_tun_src(struct net *net, struct net_device *dev, | |
75 | struct in6_addr *daddr, struct in6_addr *saddr) | |
76 | { | |
77 | struct seg6_pernet_data *sdata = seg6_pernet(net); | |
78 | struct in6_addr *tun_src; | |
79 | ||
80 | rcu_read_lock(); | |
81 | ||
82 | tun_src = rcu_dereference(sdata->tun_src); | |
83 | ||
84 | if (!ipv6_addr_any(tun_src)) { | |
85 | memcpy(saddr, tun_src, sizeof(struct in6_addr)); | |
86 | } else { | |
87 | ipv6_dev_get_saddr(net, dev, daddr, IPV6_PREFER_SRC_PUBLIC, | |
88 | saddr); | |
89 | } | |
90 | ||
91 | rcu_read_unlock(); | |
92 | } | |
93 | ||
b5facfdb AA |
94 | /* Compute flowlabel for outer IPv6 header */ |
95 | static __be32 seg6_make_flowlabel(struct net *net, struct sk_buff *skb, | |
96 | struct ipv6hdr *inner_hdr) | |
97 | { | |
98 | int do_flowlabel = net->ipv6.sysctl.seg6_flowlabel; | |
99 | __be32 flowlabel = 0; | |
100 | u32 hash; | |
101 | ||
102 | if (do_flowlabel > 0) { | |
103 | hash = skb_get_hash(skb); | |
3ee593ad | 104 | hash = rol32(hash, 16); |
b5facfdb AA |
105 | flowlabel = (__force __be32)hash & IPV6_FLOWLABEL_MASK; |
106 | } else if (!do_flowlabel && skb->protocol == htons(ETH_P_IPV6)) { | |
107 | flowlabel = ip6_flowlabel(inner_hdr); | |
108 | } | |
109 | return flowlabel; | |
110 | } | |
111 | ||
6c8702c6 | 112 | /* encapsulate an IPv6 packet within an outer IPv6 header with a given SRH */ |
32d99d0b | 113 | int seg6_do_srh_encap(struct sk_buff *skb, struct ipv6_sr_hdr *osrh, int proto) |
6c8702c6 | 114 | { |
8936ef76 DL |
115 | struct dst_entry *dst = skb_dst(skb); |
116 | struct net *net = dev_net(dst->dev); | |
6c8702c6 DL |
117 | struct ipv6hdr *hdr, *inner_hdr; |
118 | struct ipv6_sr_hdr *isrh; | |
119 | int hdrlen, tot_len, err; | |
b5facfdb | 120 | __be32 flowlabel; |
6c8702c6 DL |
121 | |
122 | hdrlen = (osrh->hdrlen + 1) << 3; | |
123 | tot_len = hdrlen + sizeof(*hdr); | |
124 | ||
bbb40a0b | 125 | err = skb_cow_head(skb, tot_len + skb->mac_len); |
6c8702c6 DL |
126 | if (unlikely(err)) |
127 | return err; | |
128 | ||
129 | inner_hdr = ipv6_hdr(skb); | |
6df93462 | 130 | flowlabel = seg6_make_flowlabel(net, skb, inner_hdr); |
6c8702c6 DL |
131 | |
132 | skb_push(skb, tot_len); | |
133 | skb_reset_network_header(skb); | |
134 | skb_mac_header_rebuild(skb); | |
135 | hdr = ipv6_hdr(skb); | |
136 | ||
137 | /* inherit tc, flowlabel and hlim | |
138 | * hlim will be decremented in ip6_forward() afterwards and | |
139 | * decapsulation will overwrite inner hlim with outer hlim | |
140 | */ | |
32d99d0b DL |
141 | |
142 | if (skb->protocol == htons(ETH_P_IPV6)) { | |
143 | ip6_flow_hdr(hdr, ip6_tclass(ip6_flowinfo(inner_hdr)), | |
b5facfdb | 144 | flowlabel); |
32d99d0b DL |
145 | hdr->hop_limit = inner_hdr->hop_limit; |
146 | } else { | |
b5facfdb | 147 | ip6_flow_hdr(hdr, 0, flowlabel); |
32d99d0b | 148 | hdr->hop_limit = ip6_dst_hoplimit(skb_dst(skb)); |
ef489749 YK |
149 | |
150 | memset(IP6CB(skb), 0, sizeof(*IP6CB(skb))); | |
32d99d0b DL |
151 | } |
152 | ||
6c8702c6 DL |
153 | hdr->nexthdr = NEXTHDR_ROUTING; |
154 | ||
155 | isrh = (void *)hdr + sizeof(*hdr); | |
156 | memcpy(isrh, osrh, hdrlen); | |
157 | ||
32d99d0b | 158 | isrh->nexthdr = proto; |
6c8702c6 DL |
159 | |
160 | hdr->daddr = isrh->segments[isrh->first_segment]; | |
a957fa19 | 161 | set_tun_src(net, dst->dev, &hdr->daddr, &hdr->saddr); |
6c8702c6 | 162 | |
9baee834 DL |
163 | #ifdef CONFIG_IPV6_SEG6_HMAC |
164 | if (sr_has_hmac(isrh)) { | |
165 | err = seg6_push_hmac(net, &hdr->saddr, isrh); | |
166 | if (unlikely(err)) | |
167 | return err; | |
168 | } | |
169 | #endif | |
170 | ||
6c8702c6 DL |
171 | skb_postpush_rcsum(skb, hdr, tot_len); |
172 | ||
173 | return 0; | |
174 | } | |
b04c80d3 | 175 | EXPORT_SYMBOL_GPL(seg6_do_srh_encap); |
6c8702c6 DL |
176 | |
177 | /* insert an SRH within an IPv6 packet, just after the IPv6 header */ | |
b04c80d3 | 178 | int seg6_do_srh_inline(struct sk_buff *skb, struct ipv6_sr_hdr *osrh) |
6c8702c6 DL |
179 | { |
180 | struct ipv6hdr *hdr, *oldhdr; | |
181 | struct ipv6_sr_hdr *isrh; | |
182 | int hdrlen, err; | |
183 | ||
184 | hdrlen = (osrh->hdrlen + 1) << 3; | |
185 | ||
bbb40a0b | 186 | err = skb_cow_head(skb, hdrlen + skb->mac_len); |
6c8702c6 DL |
187 | if (unlikely(err)) |
188 | return err; | |
189 | ||
190 | oldhdr = ipv6_hdr(skb); | |
191 | ||
192 | skb_pull(skb, sizeof(struct ipv6hdr)); | |
193 | skb_postpull_rcsum(skb, skb_network_header(skb), | |
194 | sizeof(struct ipv6hdr)); | |
195 | ||
196 | skb_push(skb, sizeof(struct ipv6hdr) + hdrlen); | |
197 | skb_reset_network_header(skb); | |
198 | skb_mac_header_rebuild(skb); | |
199 | ||
200 | hdr = ipv6_hdr(skb); | |
201 | ||
202 | memmove(hdr, oldhdr, sizeof(*hdr)); | |
203 | ||
204 | isrh = (void *)hdr + sizeof(*hdr); | |
205 | memcpy(isrh, osrh, hdrlen); | |
206 | ||
207 | isrh->nexthdr = hdr->nexthdr; | |
208 | hdr->nexthdr = NEXTHDR_ROUTING; | |
209 | ||
210 | isrh->segments[0] = hdr->daddr; | |
211 | hdr->daddr = isrh->segments[isrh->first_segment]; | |
212 | ||
9baee834 DL |
213 | #ifdef CONFIG_IPV6_SEG6_HMAC |
214 | if (sr_has_hmac(isrh)) { | |
215 | struct net *net = dev_net(skb_dst(skb)->dev); | |
216 | ||
217 | err = seg6_push_hmac(net, &hdr->saddr, isrh); | |
218 | if (unlikely(err)) | |
219 | return err; | |
220 | } | |
221 | #endif | |
222 | ||
6c8702c6 DL |
223 | skb_postpush_rcsum(skb, hdr, sizeof(struct ipv6hdr) + hdrlen); |
224 | ||
225 | return 0; | |
226 | } | |
b04c80d3 | 227 | EXPORT_SYMBOL_GPL(seg6_do_srh_inline); |
6c8702c6 DL |
228 | |
229 | static int seg6_do_srh(struct sk_buff *skb) | |
230 | { | |
231 | struct dst_entry *dst = skb_dst(skb); | |
232 | struct seg6_iptunnel_encap *tinfo; | |
32d99d0b | 233 | int proto, err = 0; |
6c8702c6 DL |
234 | |
235 | tinfo = seg6_encap_lwtunnel(dst->lwtstate); | |
236 | ||
6c8702c6 | 237 | switch (tinfo->mode) { |
6c8702c6 | 238 | case SEG6_IPTUN_MODE_INLINE: |
32d99d0b DL |
239 | if (skb->protocol != htons(ETH_P_IPV6)) |
240 | return -EINVAL; | |
241 | ||
6c8702c6 | 242 | err = seg6_do_srh_inline(skb, tinfo->srh); |
32d99d0b DL |
243 | if (err) |
244 | return err; | |
6c8702c6 | 245 | break; |
6c8702c6 | 246 | case SEG6_IPTUN_MODE_ENCAP: |
5807b22c DL |
247 | err = iptunnel_handle_offloads(skb, SKB_GSO_IPXIP6); |
248 | if (err) | |
249 | return err; | |
250 | ||
32d99d0b DL |
251 | if (skb->protocol == htons(ETH_P_IPV6)) |
252 | proto = IPPROTO_IPV6; | |
253 | else if (skb->protocol == htons(ETH_P_IP)) | |
254 | proto = IPPROTO_IPIP; | |
255 | else | |
256 | return -EINVAL; | |
257 | ||
258 | err = seg6_do_srh_encap(skb, tinfo->srh, proto); | |
259 | if (err) | |
260 | return err; | |
261 | ||
5807b22c DL |
262 | skb_set_inner_transport_header(skb, skb_transport_offset(skb)); |
263 | skb_set_inner_protocol(skb, skb->protocol); | |
38ee7f2d DL |
264 | skb->protocol = htons(ETH_P_IPV6); |
265 | break; | |
266 | case SEG6_IPTUN_MODE_L2ENCAP: | |
267 | if (!skb_mac_header_was_set(skb)) | |
268 | return -EINVAL; | |
269 | ||
270 | if (pskb_expand_head(skb, skb->mac_len, 0, GFP_ATOMIC) < 0) | |
271 | return -ENOMEM; | |
272 | ||
273 | skb_mac_header_rebuild(skb); | |
274 | skb_push(skb, skb->mac_len); | |
275 | ||
276 | err = seg6_do_srh_encap(skb, tinfo->srh, NEXTHDR_NONE); | |
277 | if (err) | |
278 | return err; | |
279 | ||
32d99d0b | 280 | skb->protocol = htons(ETH_P_IPV6); |
6c8702c6 DL |
281 | break; |
282 | } | |
283 | ||
6c8702c6 DL |
284 | ipv6_hdr(skb)->payload_len = htons(skb->len - sizeof(struct ipv6hdr)); |
285 | skb_set_transport_header(skb, sizeof(struct ipv6hdr)); | |
286 | ||
6c8702c6 DL |
287 | return 0; |
288 | } | |
289 | ||
bb4005ba | 290 | static int seg6_input(struct sk_buff *skb) |
6c8702c6 | 291 | { |
af4a2209 DL |
292 | struct dst_entry *orig_dst = skb_dst(skb); |
293 | struct dst_entry *dst = NULL; | |
294 | struct seg6_lwt *slwt; | |
6c8702c6 DL |
295 | int err; |
296 | ||
297 | err = seg6_do_srh(skb); | |
298 | if (unlikely(err)) { | |
299 | kfree_skb(skb); | |
300 | return err; | |
301 | } | |
302 | ||
af4a2209 DL |
303 | slwt = seg6_lwt_lwtunnel(orig_dst->lwtstate); |
304 | ||
af4a2209 DL |
305 | preempt_disable(); |
306 | dst = dst_cache_get(&slwt->cache); | |
307 | preempt_enable(); | |
af4a2209 | 308 | |
6c8702c6 | 309 | skb_dst_drop(skb); |
af4a2209 DL |
310 | |
311 | if (!dst) { | |
312 | ip6_route_input(skb); | |
af4a2209 DL |
313 | dst = skb_dst(skb); |
314 | if (!dst->error) { | |
315 | preempt_disable(); | |
316 | dst_cache_set_ip6(&slwt->cache, dst, | |
317 | &ipv6_hdr(skb)->saddr); | |
318 | preempt_enable(); | |
319 | } | |
af4a2209 DL |
320 | } else { |
321 | skb_dst_set(skb, dst); | |
322 | } | |
6c8702c6 | 323 | |
af3b5158 DL |
324 | err = skb_cow_head(skb, LL_RESERVED_SPACE(dst->dev)); |
325 | if (unlikely(err)) | |
326 | return err; | |
327 | ||
6c8702c6 DL |
328 | return dst_input(skb); |
329 | } | |
330 | ||
bb4005ba | 331 | static int seg6_output(struct net *net, struct sock *sk, struct sk_buff *skb) |
6c8702c6 DL |
332 | { |
333 | struct dst_entry *orig_dst = skb_dst(skb); | |
334 | struct dst_entry *dst = NULL; | |
335 | struct seg6_lwt *slwt; | |
336 | int err = -EINVAL; | |
337 | ||
338 | err = seg6_do_srh(skb); | |
339 | if (unlikely(err)) | |
340 | goto drop; | |
341 | ||
342 | slwt = seg6_lwt_lwtunnel(orig_dst->lwtstate); | |
343 | ||
fa79581e | 344 | preempt_disable(); |
6c8702c6 | 345 | dst = dst_cache_get(&slwt->cache); |
fa79581e | 346 | preempt_enable(); |
6c8702c6 DL |
347 | |
348 | if (unlikely(!dst)) { | |
349 | struct ipv6hdr *hdr = ipv6_hdr(skb); | |
350 | struct flowi6 fl6; | |
351 | ||
1b4e5ad5 | 352 | memset(&fl6, 0, sizeof(fl6)); |
6c8702c6 DL |
353 | fl6.daddr = hdr->daddr; |
354 | fl6.saddr = hdr->saddr; | |
355 | fl6.flowlabel = ip6_flowinfo(hdr); | |
356 | fl6.flowi6_mark = skb->mark; | |
357 | fl6.flowi6_proto = hdr->nexthdr; | |
358 | ||
359 | dst = ip6_route_output(net, NULL, &fl6); | |
360 | if (dst->error) { | |
361 | err = dst->error; | |
362 | dst_release(dst); | |
363 | goto drop; | |
364 | } | |
365 | ||
fa79581e | 366 | preempt_disable(); |
6c8702c6 | 367 | dst_cache_set_ip6(&slwt->cache, dst, &fl6.saddr); |
fa79581e | 368 | preempt_enable(); |
6c8702c6 DL |
369 | } |
370 | ||
371 | skb_dst_drop(skb); | |
372 | skb_dst_set(skb, dst); | |
373 | ||
af3b5158 DL |
374 | err = skb_cow_head(skb, LL_RESERVED_SPACE(dst->dev)); |
375 | if (unlikely(err)) | |
376 | goto drop; | |
377 | ||
6c8702c6 DL |
378 | return dst_output(net, sk, skb); |
379 | drop: | |
380 | kfree_skb(skb); | |
381 | return err; | |
382 | } | |
383 | ||
30357d7d | 384 | static int seg6_build_state(struct nlattr *nla, |
6c8702c6 | 385 | unsigned int family, const void *cfg, |
9ae28727 DA |
386 | struct lwtunnel_state **ts, |
387 | struct netlink_ext_ack *extack) | |
6c8702c6 DL |
388 | { |
389 | struct nlattr *tb[SEG6_IPTUNNEL_MAX + 1]; | |
390 | struct seg6_iptunnel_encap *tuninfo; | |
391 | struct lwtunnel_state *newts; | |
392 | int tuninfo_len, min_size; | |
393 | struct seg6_lwt *slwt; | |
394 | int err; | |
395 | ||
32d99d0b DL |
396 | if (family != AF_INET && family != AF_INET6) |
397 | return -EINVAL; | |
398 | ||
6c8702c6 | 399 | err = nla_parse_nested(tb, SEG6_IPTUNNEL_MAX, nla, |
9ae28727 | 400 | seg6_iptunnel_policy, extack); |
6c8702c6 DL |
401 | |
402 | if (err < 0) | |
403 | return err; | |
404 | ||
405 | if (!tb[SEG6_IPTUNNEL_SRH]) | |
406 | return -EINVAL; | |
407 | ||
408 | tuninfo = nla_data(tb[SEG6_IPTUNNEL_SRH]); | |
409 | tuninfo_len = nla_len(tb[SEG6_IPTUNNEL_SRH]); | |
410 | ||
411 | /* tuninfo must contain at least the iptunnel encap structure, | |
412 | * the SRH and one segment | |
413 | */ | |
414 | min_size = sizeof(*tuninfo) + sizeof(struct ipv6_sr_hdr) + | |
415 | sizeof(struct in6_addr); | |
416 | if (tuninfo_len < min_size) | |
417 | return -EINVAL; | |
418 | ||
419 | switch (tuninfo->mode) { | |
6c8702c6 | 420 | case SEG6_IPTUN_MODE_INLINE: |
32d99d0b DL |
421 | if (family != AF_INET6) |
422 | return -EINVAL; | |
423 | ||
6c8702c6 | 424 | break; |
6c8702c6 DL |
425 | case SEG6_IPTUN_MODE_ENCAP: |
426 | break; | |
38ee7f2d DL |
427 | case SEG6_IPTUN_MODE_L2ENCAP: |
428 | break; | |
6c8702c6 DL |
429 | default: |
430 | return -EINVAL; | |
431 | } | |
432 | ||
433 | /* verify that SRH is consistent */ | |
434 | if (!seg6_validate_srh(tuninfo->srh, tuninfo_len - sizeof(*tuninfo))) | |
435 | return -EINVAL; | |
436 | ||
437 | newts = lwtunnel_state_alloc(tuninfo_len + sizeof(*slwt)); | |
438 | if (!newts) | |
439 | return -ENOMEM; | |
440 | ||
441 | slwt = seg6_lwt_lwtunnel(newts); | |
442 | ||
191f86ca | 443 | err = dst_cache_init(&slwt->cache, GFP_ATOMIC); |
6c8702c6 DL |
444 | if (err) { |
445 | kfree(newts); | |
446 | return err; | |
447 | } | |
6c8702c6 DL |
448 | |
449 | memcpy(&slwt->tuninfo, tuninfo, tuninfo_len); | |
450 | ||
451 | newts->type = LWTUNNEL_ENCAP_SEG6; | |
38ee7f2d DL |
452 | newts->flags |= LWTUNNEL_STATE_INPUT_REDIRECT; |
453 | ||
454 | if (tuninfo->mode != SEG6_IPTUN_MODE_L2ENCAP) | |
455 | newts->flags |= LWTUNNEL_STATE_OUTPUT_REDIRECT; | |
456 | ||
6c8702c6 DL |
457 | newts->headroom = seg6_lwt_headroom(tuninfo); |
458 | ||
459 | *ts = newts; | |
460 | ||
461 | return 0; | |
462 | } | |
463 | ||
6c8702c6 DL |
464 | static void seg6_destroy_state(struct lwtunnel_state *lwt) |
465 | { | |
466 | dst_cache_destroy(&seg6_lwt_lwtunnel(lwt)->cache); | |
467 | } | |
6c8702c6 DL |
468 | |
469 | static int seg6_fill_encap_info(struct sk_buff *skb, | |
470 | struct lwtunnel_state *lwtstate) | |
471 | { | |
472 | struct seg6_iptunnel_encap *tuninfo = seg6_encap_lwtunnel(lwtstate); | |
473 | ||
474 | if (nla_put_srh(skb, SEG6_IPTUNNEL_SRH, tuninfo)) | |
475 | return -EMSGSIZE; | |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
480 | static int seg6_encap_nlsize(struct lwtunnel_state *lwtstate) | |
481 | { | |
482 | struct seg6_iptunnel_encap *tuninfo = seg6_encap_lwtunnel(lwtstate); | |
483 | ||
484 | return nla_total_size(SEG6_IPTUN_ENCAP_SIZE(tuninfo)); | |
485 | } | |
486 | ||
487 | static int seg6_encap_cmp(struct lwtunnel_state *a, struct lwtunnel_state *b) | |
488 | { | |
489 | struct seg6_iptunnel_encap *a_hdr = seg6_encap_lwtunnel(a); | |
490 | struct seg6_iptunnel_encap *b_hdr = seg6_encap_lwtunnel(b); | |
491 | int len = SEG6_IPTUN_ENCAP_SIZE(a_hdr); | |
492 | ||
493 | if (len != SEG6_IPTUN_ENCAP_SIZE(b_hdr)) | |
494 | return 1; | |
495 | ||
496 | return memcmp(a_hdr, b_hdr, len); | |
497 | } | |
498 | ||
499 | static const struct lwtunnel_encap_ops seg6_iptun_ops = { | |
500 | .build_state = seg6_build_state, | |
6c8702c6 | 501 | .destroy_state = seg6_destroy_state, |
6c8702c6 DL |
502 | .output = seg6_output, |
503 | .input = seg6_input, | |
504 | .fill_encap = seg6_fill_encap_info, | |
505 | .get_encap_size = seg6_encap_nlsize, | |
506 | .cmp_encap = seg6_encap_cmp, | |
88ff7334 | 507 | .owner = THIS_MODULE, |
6c8702c6 DL |
508 | }; |
509 | ||
510 | int __init seg6_iptunnel_init(void) | |
511 | { | |
512 | return lwtunnel_encap_add_ops(&seg6_iptun_ops, LWTUNNEL_ENCAP_SEG6); | |
513 | } | |
514 | ||
515 | void seg6_iptunnel_exit(void) | |
516 | { | |
517 | lwtunnel_encap_del_ops(&seg6_iptun_ops, LWTUNNEL_ENCAP_SEG6); | |
518 | } |